AUTOMATED STORAGE AND RETRIEVAL SYSTEM USING AN AUTOMATED LOADER AND METHODS OF REPLACING POWER SUPPLIES

Abstract

An automated storage and retrieval system includes at least one container handling vehicle, a horizontal rail system for the container handling vehicle to run on, and a charging station for recharging a replaceable power source of the container handling vehicle. The container handling vehicle includes a power supply compartment for accommodating a replaceable power supply when the container handling vehicle is in use. The charging station includes one or more charging racks. Each charging rack provides a column of charging positions for recharging replaceable power supplies and each charging position is configured to accommodate a replaceable power supply during a recharging process. The charging station includes an automated loader including a power supply support. The automated loader is arranged to move vertically and horizontally for exchanging and transporting a replaceable power supply between the charging rack and the power supply compartment of the container handling vehicle.

Claims

1. A container handling vehicle for use in an automated storage system, the container handling vehicle comprising: at least one compartment for a storage container; and a power supply compartment for accommodating a replaceable power supply, wherein the power supply compartment is arranged to receive the replaceable power supply via an opening facing in a direction in which the container handling vehicle is configured to move.

2. The container handling vehicle of claim 1, wherein the power supply compartment comprises a power supply locking assembly arranged to hold the replaceable power supply in place within the power supply compartment, the power supply locking assembly pivotably connected to an upper part of the container handling vehicle, such that the power supply locking assembly is configured to pivot between a first position, in which the power supply locking assembly is configured to hold the replaceable power supply in place, and a second position, wherein the replaceable power supply is configured to be moved.

3. The container handling vehicle of claim 2, wherein the power supply locking assembly is locked in the first position by a releasable locking mechanism.

4. The container handling vehicle of claim 3, wherein the releasable locking mechanism comprises a release mechanism arranged at or near the opening.

5. The container handling vehicle of claim 3, wherein the releasable locking mechanism comprises a protruding release mechanism.

6. The container handling vehicle of claim 2, wherein the power supply locking assembly comprises locking elements, wherein the locking elements are arranged to interact with the replaceable power supply, when the replaceable power supply is arranged in the power supply compartment and the power supply locking assembly is in the first position, such that the replaceable power supply is prevented from moving in at least a lateral direction.

7. The container handling vehicle of claim 6, wherein the locking elements are arranged on two longitudinal sidewalls interconnected by a structural element, such that the two longitudinal sidewalls are fixed relative to each other.

8. The container handling vehicle of claim 1, further comprising a lifting device arranged to transport the storage container vertically between a storage position in a stack and a transport position in a storage space.

9. The container handling vehicle of claim 8, the lifting device comprising: a gripping device, configured to releasably grip the storage container; and a lifting motor configured to raise and lower the gripping device relative to the storage space.

10. The container handling vehicle of claim 1, further comprising a wheel assembly for guiding the container handling vehicle along a track system in X and Y directions, wherein the X and Y directions are substantially orthogonal.

11. The container handling vehicle of claim 10, wherein the wheel assembly comprises a first set of wheels, arranged to engage with a first set of tracks of the track system, and a second set of wheels, arranged to engage with a second set of tracks of the track system, the first set of wheels can be moved between an upper position and a lower position, such that the first set of wheels engage with the first set of tracks in the lower position and the second set of wheels engage with the second set of tracks in the upper position.

12. The container handling vehicle of claim 11, wherein the power supply compartment is arranged to receive the replaceable power supply via the opening facing in the direction in which the container handling vehicle is configured to move when the first set of wheels are in the lower position.

13. The container handling vehicle of claim 1, wherein the opening is above the at least one compartment for the storage container.

14. An automated storage and retrieval system comprising: the container handling vehicle of claim 1; and an automated loader comprising a power supply support, the power supply support arranged to retrieve a first replaceable power supply out from the power supply compartment and to insert a second replaceable power supply into the power supply compartment.

15. The automated storage and retrieval system of claim 14, wherein the power supply support comprises two laterally extending guide arms configured to support one of the first replaceable power supply or the second replaceable power supply.

16. The automated storage and retrieval system of claim 15, wherein at least one of the two laterally extending guide arms comprises an end for interaction with a releasable locking mechanism or a power supply locking assembly.

17. The automated storage and retrieval system of claim 14, further comprising a horizontal rail system for the container handling vehicle to run on, wherein the container handling vehicle is configured to move upon the horizontal rail system in a first direction and a second direction perpendicular to the first direction.

18. The automated storage and retrieval system of claim 17, wherein the automated loader is configured to move in said first direction and said second direction for exchanging and transporting the second replaceable power supply between a charging rack and the power supply compartment of the container handling vehicle by: retrieving the first replaceable power supply from the power supply compartment and inserting the first replaceable power supply into a charging position of the charging rack; and retrieving the second replaceable power supply from the charging rack and inserting the second replaceable power supply into the power supply compartment of the container handling vehicle by the automated loader extending into said charging rack and said power supply compartment.

19. A method of transferring a replaceable power supply accommodated within a power supply compartment of a container handling vehicle to an unoccupied charging position in a charging rack of a charging station using an automated loader comprising a power supply support, the method comprising: maneuvering the container handling vehicle and/or the automated loader into position where the power supply support is at least partly protruding into the power supply compartment containing the replaceable power supply; loading the replaceable power supply onto the power supply support; and transferring the replaceable power supply on the power supply support from the container handling vehicle to the unoccupied charging position in the charging rack of the charging station.

20. The method of claim 19, wherein the transferring of the replaceable power supply from the power supply compartment of the container handling vehicle to the power supply support is achieved by adjusting a height of the power supply support of the automated loader relative the power supply compartment.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0111] Following drawings are appended to facilitate the understanding of the invention. The drawings show embodiments of the invention, which will now be described by way of example only, where:

[0112] FIG. 1 is a perspective view of a grid of a prior art automated storage and retrieval system.

[0113] FIG. 2 is a perspective view of a prior art container handling vehicle having a centrally arranged cavity for containing storage containers therein.

[0114] FIG. 3 is a perspective view of a prior art container handling vehicle having a cantilever for containing storage containers underneath.

[0115] FIG. 4 is a top view of a prior art single rail system.

[0116] FIG. 5 is a top view of a prior art double rail system.

[0117] FIG. 6 is a top view of a track system of the automated storage and retrieval system according to FIG. 1.

[0118] FIG. 7 is a perspective view of an automated storage and retrieval system comprising two container handling vehicles according to one exemplary embodiment of the invention.

[0119] FIG. 8 is a top view of the automated storage and retrieval system of FIG. 7.

[0120] FIG. 9 is a side view of the automated storage and retrieval system according to FIGS. 7 and 8.

[0121] FIG. 10 is a perspective view of a container handling vehicle according to FIGS. 7 to 9, in which view a top cover and a side panel of the vehicle are removed.

[0122] FIG. 11 is a side view of the container handling vehicle according to FIG. 10.

[0123] FIG. 12 is a cross-sectional side view of the container handling vehicle according to FIGS. 10 and 11.

[0124] FIG. 13 shows an automated loader which can be used in transferring power supply between container handling vehicle and a charging position in a charging rack;

[0125] FIGS. 14A, 14B, 14C, 14D, and 14E show in sequence a power storage source being transferred from the automated loader to a power storage source compartment of the vehicle;

[0126] FIG. 15 is a side view of an exemplary automated storage and retrieval system showing one example of a sequence for inserting a charging station mounted power storage source into the power storage source compartment of the vehicle;

[0127] FIG. 16 is a side view of a container handling vehicle releasably connected to an automated loader in accordance with one embodiment of the invention;

[0128] FIG. 17 is a perspective view of a chargeable power storage source.

[0129] FIG. 18 is a cross sectional view along the X direction of the chargeable power storage source of FIG. 17 arranged in operative position within a power supply compartment of a container handling vehicle.

[0130] FIG. 19 is a perspective view of a container handling vehicle according to a second embodiment of the invention;

[0131] FIGS. 20A and 20B are perspective side views of a container handling vehicle of a third embodiment of the invention;

[0132] FIGS. 21A and 21B are perspective views of a first embodiment of a charging station according to the invention;

[0133] FIGS. 22A, 22B, and 22C are perspective views of a second embodiment of a charging station according to the invention;

[0134] FIG. 23 is a detailed view of a single charging rack;

[0135] In the drawings, like reference numerals have been used to indicate like parts, elements or features unless otherwise explicitly stated or implicitly understood from the context.

DETAILED DESCRIPTION OF THE INVENTION

[0136] In the following, embodiments of the invention will be discussed in more detail with reference to the appended drawings. It should be understood, however, that the drawings are not intended to limit the invention to the subject-matter depicted in the drawings.

[0137] The framework 100 of the automated storage and retrieval system 1 is constructed in accordance with the prior art framework 100 described above in connection with FIGS. 1-6, i.e. a number of upright members 102 and a number of horizontal members 103, which are supported by the upright members 102, and further that the framework 100 comprises a rail system 108 of parallel tracks 110,111 in X direction and Y direction arranged across the top of storage columns 105/grid columns 112. The horizontal area of a grid column 112, i.e. the area along the X and Y directions, may be defined by the distance between adjacent tracks 110 and 111, respectively (see FIGS. 4-6).

[0138] In FIG. 1 the grid 104 is shown with a height of eight cells. It is understood, however, that the grid 104 in principle can be of any size. In particular it is understood that grid 104 can be considerably wider and/or longer and/or deeper than disclosed in FIG. 1. For example, the grid 104 may have a horizontal extent of more than 700700 grid cells and a depth of more than twelve grid cells.

[0139] One embodiment of the automated storage and retrieval system according to the invention will now be discussed in more detail with reference to FIGS. 7 to 12.

[0140] The exact configuration of the container handling vehicle 3 shown in the figures may vary. However, all vehicles 3 of of the automated storage and retrieval system 1 comprise a vehicle body 17 and a wheel assembly 18 (or any other rolling means/rolling device) arranged in a lower section or part 17a (see FIG. 12) of the vehicle body 17 to enable the lateral movement of the container handling vehicle 3, i.e. the movement of the vehicle 3 in the X and Y directions (see FIGS. 7-8).

[0141] The wheel assembly/rolling device 18 comprises a first set of wheels 19, which is arranged to engage with a pair of tracks 110a, 110b of the first set of tracks 110, and a second set of wheels 20, which is arranged to engage with a pair of tracks 111a, 111b of the second set of tracks 111 (see FIG. 8). At least one of the set of wheels 19, 20 can be lifted and lowered, so that the first set of wheels 19 and/or the second set of wheels 20 can be brought to engage with the respective set of tracks 110, 111 at any one time. The lifting/lowering procedure can for example be performed by lifting side plates 25 (see FIG. 12) attached to the respective wheels 19,20 by use of a lifting motor arranged in the upper part 17b of the vehicle 3.

[0142] Each set of wheels 19, 20 comprises four wheels 19a, 19b, 19c, 19d; 20a, 20b, 20c, 20d arranged along the sides of the vehicle 3. The wheels 19a and 19b are arranged in a first vertical plane, and the wheels 19c and 19d are arranged in a second vertical plane which is parallel to the first vertical plane and arranged at a distance from the first vertical plane which corresponds to the distance between tracks 110a and 110b (see e.g. FIG. 8). The wheels 20a and 20b are arranged in a third vertical plane, which is orthogonal to the vertical planes in which the wheels 19a, 19b, 19c and 19d are arranged, and the wheels 20c and 20d are arranged in a fourth vertical plane which is parallel to the third vertical plane and arranged at a distance from the third vertical plane which corresponds to the distance between the tracks 111a and 111b.

[0143] At least one of the wheels in each set 19, 20 is motorized in order to propel the vehicle 3 along the rail system 108. Advantageously, the at least one motorized wheel in each set 19, 20 comprises a hub motor, i.e. an electric motor that is coupled to, or incorporated into, the hub of a wheel and drives the wheel directly. An example of a container handling vehicle with such a motor is disclosed in WO2016/120075A1, the contents of which are incorporated herein by reference.

[0144] Each container handling vehicle 3 comprises a storage compartment or bin storage space 24 arranged within the lower part 17a of the vehicle body 17 (see FIG. 12) for receiving and holding a storage container 106 when transporting the storage container 106 across the rail system 108 (see FIG. 8). The bin storage space 24 can be accessed from below, i.e. from an opening at the bottom of the container handling vehicle 3. In the particular vehicle configuration shown in FIGS. 7-16, the bin storage space 24 is arranged centrally or substantially centrally within the vehicle body 17.

[0145] Each container handling vehicle 3 also comprises a lifting device 21 (see FIGS. 10 and 12) for vertical transportation of a storage container 106, e.g. lifting a storage container 106 from a storage column 105 and bringing it into the bin storage space 24, and also for lowering a storage container 106 from the storage space 24 into a storage column 105. The lifting device 21 comprises a gripping device 22 which is arranged to releasably engage with a storage container 106. The lifting device 21 also comprises a motorized lifting mechanism 23 for lowering and raising the gripping device 22 so that the position of the gripping device 22 with respect to the vehicle body 17 can be adjusted in a third direction Z, i.e. orthogonal the first direction X and the second direction Y (see also FIG. 7). In the vehicle configuration illustrated in FIGS. 10 and 12 the gripping device 22 comprises remotely operated claws 22a attached underneath a lifting plate 22b. The lifting plate 22b may be connected to a plurality belts (not shown) constituting part of the motorized lifting mechanism 23.

[0146] The motorized lifting mechanism 23 is arranged in the upper part 17b of the vehicle body 17 (see FIG. 12), below a battery cover or house 27 for mounting of a chargeable power supply 28 (see FIG. 10) and above the lower part 17a with the bin storage space 24.

[0147] When a storage container 106 stored in the storage grid 104 is to be accessed, one of the container handling vehicles 3 is instructed to retrieve the target storage container 106 from its position in the storage grid 104 and to transport the target storage container 106 to an access station (not shown) where it can be access from outside of the storage grid 104 or transferred out of the storage grid 104. This operation involves moving the container handling vehicle 3 to the grid cell 122 above the storage column 105 in which the target storage container 106 is positioned and retrieving the storage container 106 from the storage column 105 using the container handling vehicle's lifting device 21. The lifting device 21 lifts the storage container 106 from the storage column 105 through the grid opening 115 of the grid cell 122 and into the storage space 24 of the vehicle 3.

[0148] If the target storage container 106 is located deep within a stack 107 (shown in FIG. 1), i.e. with one or a plurality of other storage containers positioned above the target storage container 106, the operation also involves temporarily moving the above-positioned storage containers prior to lifting the target storage container 106 from the storage column 105. This step, which is sometimes referred to as digging within the art, may be performed with the same container handling vehicle 3 that is subsequently used for transporting the target storage container 106 to the access station, or with one or a plurality of other cooperating container handling vehicles 3. Alternatively, or in addition, the automated storage and retrieval system 1 may have container handling vehicles specifically dedicated to the task of temporarily removing storage containers from a storage column 105, for example the multi-container handling vehicle 5 shown in FIG. 19. Once the target storage container 106 has been removed from the storage column 105, the temporarily removed storage containers can be repositioned into the original storage column 105. The removed storage containers may alternatively, or in addition, be relocated to other storage columns.

[0149] Once the target storage container 106 has been brought into the storage space 24 of the container handling vehicle 3, the vehicle 3 transports the storage container 106 to the access station where it is unloaded. The access station may typically comprise a grid location at the periphery of the storage grid 104 where the storage container 106 can be accessed manually or transported further using a suitable conveyor system (not shown).

[0150] When a storage container 106 is to be stored in the storage grid 104, one of the container handling vehicles 3 is instructed to pick up the storage container 106 from a pick-up station (not shown), which may also double as an access station, and transport it to a grid cell 122 above the storage column 105 where it is to be stored. After any storage containers positioned at or above the target position within the storage column stack 107 have been removed, the container handling vehicle 3 positions the storage container 106 at the desired position. The removed storage containers may then be lowered back into the storage column 105 or relocated to other storage columns within the storage grid 104.

[0151] For monitoring and controlling the automated storage and retrieval system 1 so that a desired storage container 106 can be delivered to the desired location at the desired time without the container handling vehicles 3 colliding with each other, the automated storage and retrieval system 1 comprises a control system, which typically is computerised and comprises a database for monitoring and controlling e.g. the location of the respective storage containers 106 within the storage grid 104, the content of each storage container 106 and the movement of the container handling vehicles 3. Each vehicle 3 should thus be equipped with onboard control and communication system 35 comprising suitable transmission and receiving means (i.e. a transmitter-receiver system) to enable transmission and receival of signals from and to the remotely situated control system. The container handling vehicles 3 typically communicates with the control system via wireless communication means, e.g. via a WLAN operating under an IEEE 802.11 (WiFi) standard and/or utilising a mobile telecommunication technology such as 4G or higher.

[0152] Each container handling vehicle 3 comprises a power supply 28 (i.e. a replaceable power supply) which provides power to onboard equipment, including the motorised rolling device 18, the motorised lifting mechanism 23 and the onboard control and communications systems 35.

[0153] Each of the container handling vehicles 3 shown in FIGS. 7-12 and FIGS. 14-16 has a footprint, i.e. a contact area against the rail system 108, which has a horizontal extension or area which is equal to or less than the horizontal area of a grid cell 122. In other words, when the vehicle 3 is positioned above a grid cell 122, e.g. for lifting a storage container 106 from or lowering a container 106 into a storage column 105, the footprint of the vehicle 3 will not extend beyond the grid cell 122 into a neighbouring grid cell 122. The wheels 19a-19d, 20a-20d are arranged around the periphery of the bin storage space 24, and the footprint of the vehicle 3 is larger than the storage space 24 only enough to accommodate the wheels 19a-19d, 20a-20d. In this way, the footprint of the vehicle 3 takes up the minimum possible amount of space in the X-Y plane. Since the bin storage space 24 is positioned between the pair of wheels, i.e. the pairs 19a and 19b, 19c and 19d, 20a and 20b and 20c and 20d, the centre of gravity of the vehicle 3 will be located within the footprint 30 also when a storage bin 106 is raised into the storage space 24.

[0154] Further, the vehicle 3 comprises generally vertical side walls 26a-26d (see FIGS. 7, 9-11 and 14-16), which are co-planar to the vertical planes in which the wheels 19a-19d; 20a-20d are arranged. Consequently, the lower part of the container handling vehicle 3 has a generally cuboid shape.

[0155] By arranging the battery cover 27 and the power supply 28 fully above the bin storage space 24, within the upper part 17b, the power supply 28 may be placed deeper into the vehicle 3 without causing a significant reduction in the available storage space for the bin 106. In addition to enable the use of larger power supplies/batteries 28, a deeper arrangement of the batteries compared to the prior art solutions where the batteries are arranged at the vehicles' side walls, increases the overall stability conditions for the vehicle 3. The term deeper is herein defined relative to the outermost perimeter of the vehicle 3 in the X-Y directions, that is, in a lateral direction towards the vertical axis going through the vehicle's 3 centre of gravity.

[0156] In the rail system 108 shown in FIGS. 5 and 8, each horizontal member making up the track system comprises two tracks. Consequently, each horizontal member is capable of accommodating two or more wheels in parallel. In such a rail system 108, the borders between neighbouring grid cells 122 run along the centre-line of the horizontal members, as is indicated in FIG. 5.

[0157] FIG. 13 shows an automated loader 40 which can be used in transferring power supply between a container handling vehicle and a charging position in a charging rack.

[0158] An automated storage and retrieval system 1 as described herein may comprise a plurality of such automated loaders 40. The automated loader 40 is arranged to move horizontally by first and second sets of wheels 19a-d, 20a-d arranged on the base 40. The operation of the first and second sets of wheels of the automated loader 40 to drive in the X and Y directions are preferably similar to the operation of the first and second wheels of the container handling vehicles and its operation will not be repeated. A mainly vertical column 42 extends upwardly from the base, along which column 42 a power supply support 43 may travel in a vertical direction. The combination of the first and second sets of wheels and the vertical column 42 provide for the possibility of moving the power supply support 43 of the automated loader 40 in the XYZ directions (i.e. both vertical and horizontal movement). This manoeuvrability ease the replacement of power supplies 28 between the power supply compartment 27a of the container handling vehicles 3-5 and the charging rack by retrieving a replaceable power supply 28 from and inserting a replaceable power supply 28 into a charging position of the charging rack and by retrieving a replaceable power supply from and inserting a replaceable power supply into the power supply compartment 27a of the container handling vehicle by the automated loader extending into said charging rack 40 and power supply compartment 27a.

[0159] Moreover, the power supply support 43 may comprise two guiding pins (i.e. guiding arms) 43a,43b extending a distance L from an outer perimeter of the column 42.

[0160] The size of the base 70 is preferably similar to the size of a grid cell of an underlying rail system 108.

[0161] One possible power supply/battery exchange process will now be described with particular reference to FIGS. 14A-E, FIG. 15 and FIG. 16, where FIGS. 14A-E show in sequence a power storage source being transferred from the automated loader to a power storage source compartment of the vehicle, FIG. 15 is a side view of an exemplary automated storage and retrieval system showing one example of a sequence for inserting a charging station mounted power storage source into the power storage source compartment of the vehicle, and FIG. 16 is a side view of a container handling vehicle releasably connected to an automated loader in accordance with one embodiment of the invention.

[0162] Referring to FIG. 14A, the automated loader 40 has discarded the replaceable power source 28 from the power supply compartment 27a of the container vehicle 3. The replaceable power source 28 is carried by the power supply support 43 of the automated loader 40.

[0163] Comparing FIG. 14B with 14A, one can see that in FIG. 14B the container handling vehicle 3 stands at rest in the same cell as in FIG. 14A, while the automated loader 40 has moved away from the container handling vehicle 3. The movement of the automated loader 40 is rendered possible by operating the wheels 19a-19d in the X direction on the rail system 108.

[0164] In order to provide stable discard/retrieval and insert operations of the power supply 28 out from and into the power supply compartment 27a, as well as correctly align the replaceable power supply 28 during exchanging operations, all wheels 19a-19d, 20a-20d of the container handling vehicle 3 are preferably in contact with the underlying rail system 108 during these operations. Typical vertical displacement of the vehicle 3 is 5-15 mm, for example 10 mm.

[0165] Referring to FIG. 14C, the automated loader 40 has picked up a charged power supply 28, which power supply 28 is about to enter the power supply compartment 27a of the container handling vehicle 3. The charged power supply 28 is mounted/carried on the power supply support 43, which in the example shown is in form of two guiding pins 43a,43b (i.e. guiding arms) extending laterally/horizontally away from the base 70 of the automated loader 40.

[0166] When the automated loader 40 is contacting the vehicle 3 (see FIG. 14C), a release mechanism 50 (i.e. a releasable locking mechanism) is activated, allowing the battery cover 27 to be tilted around a rotational Y axis.

[0167] In the example shown in FIG. 14C, the release mechanism 50 comprises a pivot arm 51 arranged at each side of the opening of the power supply compartment 27a into which the replaceable power supply 28 is about to enter.

[0168] Further, each of the protruding ends of the guiding pins 43a,43b (constituting the power supply support 43) displays a tapered section 52. Upon contact between the pivot arm 51 and the guiding pins 43a,43b, a pivot arm contact element 51a of each pivot arm 51 is pushed towards the tapered section 52, thereby enforcing an upward directed pivoting movement of the pivot arm 51 (see FIGS. 14C, 14D, 14E). This pivot movements releases a security lock 51b (see FIGS. 14E and 16) allowing the above-mentioned tilt of the battery cover 27.

[0169] The operation of the release mechanism 50 is illustrated in each of the sequence drawings in FIGS. 14A-E. To increase clarity, enlarged area drawings of the release mechanism 50 is added in FIG. 14C and FIG. 16. The enlarged area drawings clearly show the activation of the pivot arm movement upon contact with the tapered section 52 moving the security lock 51b away from the battery cover 27 and the subsequent entry of the power supply 28.

[0170] When the guiding pins 43a,43b with the attached power supply 28 has entered a certain distance into the power supply compartment 27a, the guiding pins 43 releases a battery lock 27b, 27c that allows further entry until the power supply 28 is fully in its end position within the power supply compartment 27a (see FIG. 18).

[0171] In FIG. 18, the battery lock 27b,c (i.e. a power supply locking assembly) comprises a battery lock activator in the form of a wheel 27b and one or more blocking teeth 27c extending from the inner walls of the battery cover 27 (i.e. from the sidewalls 36 of the power supply locking assembly) and into the power supply compartment 27a. When the tapered ends 52 of the guiding pins 43a,b contact the wheel 27b, the battery cover 27 is tilted upwards, thereby displacing the one or more teeth 27c such that the power supply 28 and the guiding pins 43a,b may continue the movement deeper into the power supply compartment 27a. It is noted that the main function of the battery cover 27 is to act as a constructional element of the battery lock, providing rigidity to the two side walls on which the blocking teeth and the wheel is arranged. Thus, in other embodiments the battery cover may be any element able to provide adequate support/rigidity to the two side walls (or longitudinal elements) on which the blocking teeth and the wheel is arranged.

[0172] When the power supply 28 is in its end position inside the battery cover 27 and in electrical contact with the corresponding electrical connector of the vehicle 3, the battery cover 27 tilts back to its initial position such that the teeth 27c physically lock or hold the power supply 28 within the power supply compartment 27a. As an example, the teeth 27c may enter dedicated recesses 49a within support rails 49 arranged at both sides of the power supply 28 (see FIG. 17).

[0173] The battery lock 27b,c may be any physical hindrance within the power supply compartment 27a. As an alternative to the above-mentioned teeth 27c, the battery lock may comprise one or more protruding wedges, pawls or cathces that the power supply 28 may surpass in one direction, but not in the other. In this configuration, the wedge shape would act as the battery lock activator 27b.

[0174] When the power supply 28 is in its end position and successfully locked into the power supply compartment 27a by the battery lock 27b,c, the power supply support 43 of the automated loader 40 is lowered relative the vehicle 3, thereby power supply 28 is hung off in the power supply compartment 27a and released from the engagement with the guiding pins 43a,43b. The power supply exchange operation is then complete and the container handling vehicle 3 can continue with its normal tasks. The guiding pins 43a, 43b of automated loader 40 are then moved out of the power supply compartment 27a either by moving the automated loader 40 or by moving the container handling vehicle 3. Instead of raising the power supply support 43 to release the power supply 28, it is possible to raise the wheels of the container handling vehicle to provide the relative movement of the power supply support 43 and the power supply compartment 27a.

[0175] Since now the battery lock 27b,c is locking the power supply 28 into the power supply compartment 27a, and the power supply 28 has been lifted free from the power supply support 43, a relative movement of the container handling vehicle 3 away from the automated loader 40 leaves the power supply 28 electrically connected to the vehicle 3.

[0176] In addition to allowing successful exchange of power supply 28, the blocking of the power supply 28 into the power supply compartment 27a has the advantage that the power supply 28 cannot be unintentionally displaced within the battery cover 27 during operation.

[0177] When the control system has sent an instruction to the automated loader 40 that the vehicle 3 is in need of a power supply 28 exchange, the steps for transferring the power supply 28 from the vehicle 3 to the charging station rack 40 are essentially equal or similar to the opposite sequence and direction of the above-mentioned steps of transferring the power supply 28 from the charging station rack 40 to the vehicle 3 using the automated loader 40.

[0178] Hence, the opening of the power source compartment 27a is aligned with the power supply 28 carried by the power supply support 43.

[0179] During the relative movement of the vehicle 3 and the automated loader 40, the tapered ends 52 of the first and second guiding pins 43a,b first activate the tilt of the battery cover 27 via the release mechanism 51, then active the battery lock 27b,c causing the battery cover 27 to tilt upwards, thereby removing the blocking teeth 27c from the corresponding recesses 49a in the support rail 49.

[0180] By lowering the vehicle 3 towards the rail system 108, the support rails 49 of the battery 28 mesh with the battery support 43. A subsequent retraction of the vehicle 3 would thus leave the power supply 28 on the guiding pins 43a,43b of the power supply support 43. Alternatively, the power supply support 43 can be raised relative the power supply compartment 27a, thereby releasing the power source 28 from the power supply compartment 27a.

[0181] In case there is a need of manual interference for removing the power supply 28 from the power supply compartment 27a, for example due to general maintenance or accidental power supply/battery jamming, a configuration with a protruding release mechanism 50 has an additional advantage in that it allows easy manual unlocking of the power supply 28. That is, the protruding arrangement allows for exertion of sufficient manual force on the release mechanism 50, an operation that would be difficult if for example the release mechanism 50 was arranged deep within the battery cover 27.

[0182] An example of a power supply in the form of a battery 28 is shown in perspective in FIG. 17. One of two support rails 49 is shown protruding from a side wall of the battery 28. And identical support rail is protruding from the opposite side wall. The purpose of the support rails 49 is to both ensure a stable support of the power supply 28 on the battery support/guiding pins 43 and to ensure an accurate guiding of the power supply 28 into and out of the power supply compartment 27a during exchange. FIG. 18 shows the power supply 28 with support rails 49 being inserted fully within the power supply compartment 27a. In the particular configuration shown in FIG. 18, the power supply 28 is approximately half the maximum allowable volume of a power supply.

[0183] FIG. 19 shows perspective view of a vehicle 4 on a framework structure 100 according a second. As for the vehicle 3 according to the first embodiment, the battery cover(s) 27 enclosing the power supply compartment(s) 27a is for the second and third embodiments arranged above the bin storage space 24.

[0184] FIGS. 20A and B shows an example of a vehicle 5 comprising two battery covers 27 arranged adjacent to another. In FIG. 20 B the outer walls and lid of the vehicle 5 have been removed. In order to inter alia improve weight distribution during lifting and transport, the vehicle 5 comprises six wheels for each wheel set.

[0185] FIGS. 21A and 21B are perspective views of the first embodiment of a charging station 90 according to the invention with an automated loader 40 with wheels operating on the rail system 108 where the container handling vehicles 3 operate. In FIG. 21A there is shown a container handling vehicle 3, a horizontal rail system 108 for the container handling vehicle 3 to run on, and a charging station 90 for recharging a replaceable power source 28 of the container handling vehicle 3. The charging station 90 is provided on or at the horizontal rail system 108 and is disclosed with a plurality of vertical charging racks 91, each charging rack 91 providing a column of charging positions 92 for recharging replaceable power supplies 28 and each charging position 92 being configured to accommodate a replaceable power supply 28 during a recharging process. The charging station 90 is further disclosed with an automated loader 40 with wheels operating on the rail system 108. The automated loader 40 is arranged to move vertically and horizontally in the X and Y directions using the wheels for exchanging and transporting a replaceable power supply 28 between the charging position 92 in the charging rack 91 and the power supply compartment 27a of the container handling vehicle 3 by retrieving a replaceable power supply 28 from and inserting a replaceable power supply 28 into a charging position 92 of the charging rack 91 and by retrieving a replaceable power supply 28 from and inserting a replaceable power supply 28 into the power supply compartment 27a of the container handling vehicle 3 by the power supply support 43 of the automated loader 40 extending into said charging position 92 in the charging rack 91 and the power supply compartment 27a of the container handling vehicle 3.

[0186] In the disclosed example of FIG. 21A, it is disclosed two automated loaders 40 and a row of charging racks 91 arranged side-by-side and one single charging rack arranged opposite the row of charging racks 91. The number of charging racks 91 as well as the number of charging positions 92 within each rack 91 can be varied depending on the needs. The charging racks 91 may be single modules with a charging position 92 at each level, or may comprise a number of modules with two or more charging positions 92 at each level. The charging rack 91 is preferably connected directly to the top or the side of the rail system 108.

[0187] Further referring to FIG. 21A, the automated loader 40 closest to the container handling vehicle 3 carries a power supply 28 using the power supply support 43, and is about to insert a charged power supply 28 into, or has retrieved a used power supply 28 out of, the power supply compartment 27a of the container handling vehicle 3.

[0188] FIG. 21B is a view of the charging station 90 of FIG. 21A from an opposite side. Furthermore, the disclosed charging station 90 is arranged close or adjacent to a service area 80, thereby it is easy to move the container handling vehicles 3 to the service area 80 in the event of failure during power supply/battery 28 change. A service area 80 is normally an area physically separated from the rail system 108 where operators may manually inspect, maintenance or repair container handling vehicles 3. As is seen in FIG. 21A barriers are provided between the rail system 108 and the service area 80, and a port 81 is provided in the barrier for container handling vehicles 3 to pass through said barriers.

[0189] FIGS. 22A-C are perspective views of a second embodiment of a charging station 90 according to the invention with an automated loader 40 on an independent rail system 71 arranged on the rail system 108 where the container handling vehicles 3 operate. In the embodiment in FIGS. 22A-C movement of the automated loader 40 in the XYZ directions is achieved by one set of rails 71 in the X or Y direction which enables horizontal movement in one of said directions, and a linear actuator 72 enables movement in the other X or Y direction, and a vertical column 42 configured for vertical guiding of the power supply support 42 which enables movement in the Z direction.

[0190] The automated loader 40 in FIGS. 22-23 may comprise a similar power supply support 43 as the automated loader 40 described above.

[0191] In the embodiment of FIG. 22A it is disclosed a row comprising four charging racks 91. The rail system 71 of the automated loader 40 is arranged such that relative the charging racks 91 that the power supply support 43 of the automated loader 40 can reach all storage positions 92 in the charging racks 91. In addition, the automated loader 40 is arranged such that the power supply support 43 can access a power supply compartment 27a of a container handling vehicle 3 positioned adjacent the rack. In FIG. 22A, the container handling vehicle 3 in need of a power supply 28 change, has been instructed by the control system to position itself next to the charging rack 91 (on the right hand side in the Figure), such that the automated loader 40 can access the power supply compartment 27a of the container handling vehicle 3 and can easily replace the power supply 28. In FIG. 22A, the guiding pins (not shown) of the power supply support 43 is arranged inside the power supply compartment 27a.

[0192] Referring to FIG. 22B, the automated loader 40 has retrieved the power supply 28 from the power supply compartment 27a and put the used power supply 28 into a charging position 92 in the charging rack 91 at the uppermost level in the charging rack 91 (the charging rack to the left in the Figure).

[0193] In FIG. 22C, the automated loader 40 has retrieved the power supply 28 from charging position 92 (charging position number three from below in the charging rack 91 to the left in the Figure). The automated loader 40 may then transfer the power supply 28 to the power supply compartment 27a of the container handling vehicle 3 positioned at the opposite end of the row of charging racks 91. The insertion of the power supply 28 into the power supply compartment 27a is performed as discussed above. Once a recharged power supply 28 has been successfully inserted in the container handling vehicle 3, the container handling vehicle 3 may return to its normal tasks of handling storage containers, and another container handling vehicle may arrive in the charging station 90 to have its power supply replaced.

[0194] Furthermore, as in FIGS. 21A-B, the disclosed charging station 90 in FIGS. 22A-C is arranged close or adjacent to a service area 80, thereby it is easy to move the container handling vehicles 3 to the service area 80 in the event of failure during power supply/battery 28 change.

[0195] Referring to FIG. 23 it is disclosed a detailed view of a charging station 90 with a single charging rack 91 with a plurality of vertical charging positions 92. It is disclosed one charging position 92 at each level in the charging rack 91. Each of the charging positions 92 in the charging rack 91 preferably comprises a charging socket (not shown) at an elevation in the charging position 92 at the same level as the position of corresponding charging plug 46 of the power supply 28. The charging socket is electrically connected to a power supply (not shown), possibly via a power transformer transforming the charging power to the desired power level.

[0196] The charging socket is further configured to receive a charging plug 46 on the power supply 28 installed on each vehicle 3 (see. FIG. 17), thereby allowing flow of electric power when the charging plug 46 is electrically coupled to the charging socket.

[0197] The charging socket may be resiliently attached to the charging position 92 in the charging station rack 42, such that the position of the charging socket is fixed in an upper (unloaded) position when no external force act on the charging socket and in a lower (loaded) position when the charging socket is exposed to the weight of the electrically connected power supply 28. This feature ensures that the charging socket and the charging plug 46 is at the same level relative to each other during connection and disconnection. Having the charging socket biased towards the upper position and able to move into a lower position due to the weight of the battery is a highly advantageous feature since it allows for the use of standard plug/socket charging connectors. Without the feature of having a biased charging socket, a plug and socket would have to be able to move vertically relative to each other while being fully connected (i.e. move relative to each other in a direction being perpendicular to the direction in which they move during connection). Although such plug/socket connectors may be envisioned, they would likely be unable to provide a secure connection having a required charging capacity and reliability.

[0198] The charging socket and the charging plug 46 may of course be interchanged.

[0199] In general, any kind of disconnectable electrical connections between the charging position 92 and the power supply 28 is possible.

[0200] In the preceding description, various aspects of a charging station and an automated storage and retrieval system according to the invention have been described with reference to the illustrative embodiment. However, this description is not intended to be construed in a limiting sense. Various modifications and variations of the illustrative embodiment, as well as other embodiments of the system, which are apparent to persons skilled in the art, are deemed to lie within the scope of the present invention as defined by the following claims.

TABLE-US-00001 1 Automated storage and retrieval system 3 Vehicle, first embodiment 3a First vehicle, first embodiment 3b Second vehicle, first embodiment 4 Vehicle, second embodiment 5 Vehicle, third embodiment 17 Vehicle body 17a Lower section of vehicle body 17 17b Upper section of vehicle body 17 18 Wheel assembly/rolling means/rolling device 19 First set of wheels 19a First wheel of the first set 19b Second wheel of the first set 19c Third wheel of the first set 19d Fourth wheel of the first set 20 Second set of wheels 20a First wheel of the second set 20b Second wheel of the second set 20c Third wheel of the second set 20d Fourth wheel of the second set 21 Lifting device 22 Gripping device 23 Lifting motor 24 Storage compartment, bin storage space 25 Side plate (attached to first or second set of wheels) 26 Side walls of vehicle 26a First side wall oriented in second direction (Y) 26b Second side wall oriented in second direction (Y) 26c Third side wall oriented in first direction (X) 26d Fourth side wall oriented in first direction (X) 27 Power supply cover/battery cover/battery house 27a Power supply compartment/power supply compartment 27b Battery lock activator 27c Blocking teeth 28 Power supply/main power supply; battery/main battery 29 Recessed section 30 Opening of power supply compartment 32 Profiled surface, (Protrusion on guiding pin) 35 Onboard control and communication system 36 Sidewall/longitudinal element 40 Automated loader with wheels 40 Automated loader with independent rail system 42 Column automated loader first embodiment 42 Column automated loader second embodiment 43 Power supply support/battery support/guiding means/guide/ guiding pins 43a First guiding pin 43b Second guiding pin 44 Power supply/power transformer 46 Power supply charging connection/charging socket 49 Support rail 49a Recess (in support rail 49) 50 Release mechanism 51 Pivot arm 51a Pivot arm contact element 52b Security lock (to hinder tilt of power supply cover 27) 52 Tapered section (of guiding pins) 70 Base of automated loader 71 Independent rail system X/Y 72 Linear actuator 80 Service area 81 Port 90 Charging station 91 Charging station rack 92 Charging position 100 Framework structure 102 Upright members of framework structure 103 Horizontal members of framework structure 104 Storage grid 105 Storage column 106 Storage container 106 Particular position of storage container 107 Stack 108 Rail system/track system 110 Parallel tracks in first direction (X) 110a First track of neighboring tracks 110 110b Second track of neighboring tracks 110 111 Parallel tracks in second direction (Y) 111a First track of neighboring tracks 111 111b Second track of neighboring tracks 111 112 Grid column 115 Grid opening 119 First port column/first port 120 Second port column/second port 122 Grid cell/storage cell 201 Prior art single cell storage container vehicle 201a Vehicle body of the storage container vehicle 101 201b Drive means/wheel arrangement, first direction (X) 201c Drive means/wheel arrangement, second direction (Y) 301 Prior art cantilever storage container vehicle 301a Vehicle body of the storage container vehicle 101 301b Drive means in first direction (X) 301c Drive means in second direction (Y) X First direction Y Second direction Z Third direction P Horizontal plane D Distance from termination of column's lower end to the lowermost part of the power supply support L Distance from the outer perimeter of the column to a geometrical size of the power supply and/or the horizontal center point of the vehicle under charge.