Mobility system that charges a drive battery of an electrically drivable motor vehicle

Abstract

A mobility system includes an electrically drivable motor vehicle and an electrically drivable battery transport cart. A rechargeable drive battery of the motor vehicle is received in the battery transport cart. The battery transport cart can be releasably inserted into a downwardly open region of a supporting structure of the motor vehicle. The disclosure also relates to a battery transport cart, an electrically drivable motor vehicle and a method to charge a rechargeable drive battery of an electrically drivable motor vehicle.

Claims

1. A mobility system comprising: an electrically drivable motor vehicle having a downwardly open region of a supporting structure; and an electrically drivable battery transport cart configured to receive a rechargeable drive battery of the motor vehicle, and releasably insert into the downwardly open region of the supporting structure, wherein the battery transport cart comprises an upper part articulatably connected to a lower part, the upper part is constructed for releasable insertion into the downwardly open region of the supporting structure, and the lower part comprises a chassis, wherein the upper part is vertically adjustable relative to the lower part.

2. The mobility system as claimed in claim 1 further comprising a holding device that holds the battery transport cart in the downwardly open region of the supporting structure of the motor vehicle.

3. The mobility system as claimed in claim 2, wherein the battery transport cart is adjustable in the vertical direction via the holding device.

4. The mobility system as claimed in claim 1, wherein the upper part is pivotable about a longitudinal or a transverse axis with respect to the lower part such that the upper part is orientable at a first incline angle while the lower part is oriented at a second incline angle.

5. The mobility system as claimed in claim 1, wherein the upper part is adjustable with respect to the lower part with at least two lifting cylinders.

6. The mobility system as claimed in claim 1, wherein the chassis of the battery transport cart has at least two crawlers.

7. The mobility system as claimed in claim 6, wherein the at least two crawlers are each pivotable about an axis parallel to the longitudinal axis of the battery transport cart.

8. The mobility system as claimed in claim 1, wherein a drive of the battery transport cart is powered by the drive battery of the motor vehicle.

9. The mobility system as claimed in claim 1, wherein the battery transport cart is controlled by an external control device via a wireless connection and is autonomously movable.

10. The mobility system as claimed in claim 1, wherein the battery transport cart comprises at least one drive motor of the motor vehicle, which can be coupled to at least one drive shaft of the motor vehicle.

11. An electrically drivable motor vehicle having a rechargeable drive battery comprising: an electrically driven battery transport cart that has an upper part articulatably adjustable with respect to a lower part in a vertical direction such that the upper part is orientable at a first incline angle while the lower part is oriented at a second incline angle; and a supporting structure of the motor vehicle that has a downwardly open region into which the battery transport cart can be releasably inserted via the upper part.

12. The electrically drivable motor vehicle as claimed in claim 11 further comprising a holding device that holds the battery transport cart in the downwardly open region of the supporting structure of the motor vehicle.

13. The electrically drivable motor vehicle as claimed in claim 11, wherein the chassis of the battery transport cart has at least two crawlers, each pivotable about an axis parallel to a longitudinal axis of the cart.

14. The electrically drivable motor vehicle as claimed in claim 11, wherein the cart is controlled by an external control device via a wireless connection.

15. A method to charge a vehicle rechargeable drive battery comprising: receiving the drive battery in an electrically driven battery transport cart that has an upper portion articulatably connected to a chassis; and inserting the cart into a downwardly open region of a supporting structure by: lowering the chassis onto a roadway while the upper portion is fixedly secured to the supporting structure, releasing the battery transport cart from the downwardly open region of the supporting structure, vertically adjusting the upper portion relative to the chassis to align the chassis upon the roadway, moving the battery transport cart to a charging connection, charging the drive battery, moving the battery transport cart to a vehicle, vertically adjusting the upper portion to align with the support structure, inserting the battery transport cart into the downwardly open region of the supporting structure, and lifting the chassis off the roadway.

16. The method to charge a vehicle rechargeable drive battery as claimed in claim 15 further comprising holding the cart in the downwardly open region of the supporting structure of the motor vehicle via a holding device.

17. The method to charge a vehicle rechargeable drive battery as claimed in claim 15 further comprising controlling the cart by an external control device via a wireless connection.

18. The method to charge a vehicle rechargeable drive battery as claimed in claim 15 further comprising powering a drive of the battery transport cart by the drive battery.

19. The method to charge a vehicle rechargeable drive battery as claimed in claim 15 further comprising adjusting a chassis of a lower part of the cart via at least two lifting cylinders in a vertical direction with respect to an upper part of the cart.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1A to 1F are a first exemplary embodiment of a battery transport cart according to the disclosure in different views;

(2) FIG. 2 depicts a use of a battery transport cart to negotiate slopes, by way of example;

(3) FIGS. 3A to 3F depict insertion of the battery transport cart into a motor vehicle according to the first exemplary embodiment of the disclosure in a transparent side view;

(4) FIGS. 4A to 4D depict insertion of the battery transport cart into a motor vehicle according to the first exemplary embodiment of the disclosure in a sectional view;

(5) FIGS. 5A to 5C depict insertion of the battery transport cart into a motor vehicle according to the first exemplary embodiment of the disclosure in a partially transparent plan view;

(6) FIGS. 6A and 6B depict motor vehicle and a battery transport cart according to a second exemplary embodiment of the disclosure; and

(7) FIG. 7 depicts a motor vehicle and a battery transport cart according to a third exemplary embodiment of the disclosure.

DETAILED DESCRIPTION

(8) As required, detailed embodiments of the present disclosure are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present disclosure.

(9) In FIGS. 1A to 1F, a first exemplary embodiment of a battery transport cart 1 according to the disclosure is illustrated in different views. FIG. 1A here shows a view from the front, FIG. 1B shows a side view, FIG. 1C shows a partially sectional view from the rear and FIG. 1D shows a plan view from above. FIGS. 1E and 1F show the battery transport cart 1 with a lifted upper part in views which correspond to FIGS. 1B and 1C.

(10) The battery transport cart 1 comprises an upper part 2 and a lower part 3. The upper part 2 is constructed as a platform 4 with a fitted hood 5, which comprises two hood parts 6, 6 that are pivotably connected to the platform 4 in an articulated manner. Loads that can be transported by the battery transport cart 1 are received on the platform 4 or in the hood 5. The division of the hood 5 into two hood parts 6, 6 is not illustrated in all figures.

(11) The lower part 3 of the battery transport cart 1 comprises a chassis frame 7, which supports a chassis formed by two crawlers 8, 8. The crawlers 8, 8 each have a flexible crawler track 9, 9, for example made of rubber, and corresponding rollers for guidance and for driving the crawler tracks 9, 9. To drive the crawler tracks 9, 9, a respective electric motor M is furthermore provided. The lower part 3 furthermore comprises the drive battery 10 of an electrically drivable motor vehicle, which is in particular an accumulator. The drive battery can be a high voltage battery and have for example a capacity of 8 to 14 kWh, which is, in particular, sufficient for a plug-in hybrid electric vehicle (PHEV).

(12) The upper part 2 and the lower part 3 are connected to one another via an adjusting mechanism 11, which comprises four lifting cylinders 12, 12, 13, 13 that cooperate in pairs and are each connected to the lower part 3 and the upper part 2, or to the chassis frame 7 and the platform 4 in an articulated manner via a swivel joint. As can be seen in particular in FIGS. 1D and 1F, the upper part 2 can be adjusted in the vertical direction through an equal change in length of the lifting cylinders 12, 12 13, 13.

(13) It is shown in FIG. 2 how the battery transport cart 1 can negotiate a slope and gradients, in particular steps. To drive the crawler tracks 9, 9, the electric motors M (see above) here are supplied with power by the drive battery 10 of the motor vehicle, as is a drive of the lifting cylinder 12, 12, 13, 13. Through an unequal change in length of the lifting cylinders 12, 13 and 12, 13, the platform 4 can also be held in a horizontal position when negotiating slopes. It is thus possible to transport sensitive items on the platform 4 or within the hood 5 and likewise to optionally transport people on a seat (not illustrated) that is mounted on the platform 4 instead of the hood 5. The battery transport cart 1 has a control device with corresponding sensor and processor means, which is constructed in a manner known per se.

(14) FIGS. 3A to 3F illustrate the integration of the battery transport cart 1 with a charged drive battery 10 into a motor vehicle 14 that is to be operated by the drive battery 10. The individual steps are controlled by the control device of the battery transport cart 1 and a control device of the motor vehicle 14, which communicate with one another via a wireless connection. As shown in FIG. 3A, the battery transport cart 1 with the charged drive battery 10 approaches the motor vehicle 14 from the rear. Shortly before reaching the motor vehicle 14, through an adjustment of the lifting cylinders 12, 12, 13, 13, the upper part 2 of the battery transport cart is lifted to a height that corresponds approximately to that of a trunk floor of the motor vehicle 14. At the same time, the trunk lid 15 of the motor vehicle 14 opens (see FIG. 3B). The battery transport cart 1 then moves into a cut-away indentation in the trunk floor of the motor vehicle 14, which corresponds to a corresponding, downwardly open region of a supporting structure of the motor vehicle 14 (FIG. 3C). The upper part 2 is supported against the supporting structure of the motor vehicle 14 and is secured by inserting locking bolts (not illustrated) into the platform 4. An electrical connection between the drive battery 10 and the electrical system of the motor vehicle 14 is moreover automatically produced, for instance through the insertion of a corresponding plug of the motor vehicle 14 into a socket of the battery transport cart 1. By shortening the lifting cylinders 12, 12, 13, 13, the lower part 3 with the chassis and the crawlers 8, 8 is lifted and the trunk lid 15 is closed (see FIGS. 3D, 3E). The motor vehicle 14 is now operational (FIG. 3F). It is additionally optionally possible for the two hood parts 6, 6 to be folded apart to enable the trunk of the motor vehicle 14 to be used in its entirety.

(15) The steps shown in FIGS. 3C to 3F are illustrated again in FIGS. 4A to 4D in a cross-section of the motor vehicle 14. To fix the battery transport cart 1 within the supporting structure 16, locking bolts 17, 17 are provided that are still in a retracted position (FIG. 4A) when the battery transport cart 1 is moved into a downwardly open region of the supporting structure 16 of the motor vehicle 14, which is formed by the clearance between two side members. The lower part 3 of the battery transport cart is lifted after the battery transport cart has moved into the region of the supporting structure 16. The platform 4 of the battery transport cart 1 is supported on corresponding projections of the supporting structure 16 here. The upper side of the platform 4 terminates approximately with a trunk floor 18 of the motor vehicle (FIG. 4B). The locking bolts 17, 17 are inserted into corresponding receiving means of the upper part 2 of the battery transport cart 1 (FIG. 4C). Finally, the hood parts 6, 6 are folded apart to produce a uniform, readily usable trunk (FIG. 4D).

(16) The steps shown in FIGS. 3C to 3E and 4A to 4C are illustrated again in FIGS. 5A to 5C in plan view. As can be seen in particular in FIG. 5A, the battery transport cart moves into a downwardly open region of the supporting structure 16 of the motor vehicle 14, which corresponds to a cut-away portion 19 of the trunk floor 18. In the exemplary embodiment shown, four locking bolts 17, 17, 17, 17 are provided to lock the upper part 2 of the battery transport cart 1 to the supporting structure 16 of the motor vehicle 14. In FIGS. 5A to 5C, a connector plug 20 to connect the drive battery 10 to the electrical system of the motor vehicle 14 is likewise indicated. The electrical connection produced via the connector plug 20 is suitable to transmit a sufficient current strength and voltage to drive the motor vehicle.

(17) The release of the battery transport cart 1 from the motor vehicle 14 takes place in corresponding steps as described above, which are executed in reverse sequence. The release of the battery transport cart 1 can be initiated by a control device of the motor vehicle 14 or by a separate control device, for instance a smartphone having a corresponding app., and can be controlled in conjunction with a control device of the battery transport cart 1, as with the steps to connect the battery transport cart 1 to the motor vehicle 14.

(18) FIGS. 6A and 6B illustrate that, according to a second embodiment of the disclosure, the battery transport cart 21 comprises two electric drive motors 22, 22 of the motor vehicle 23, which are powered by the drive battery 10. The drive motors 22, 22 can also serve to drive the crawler tracks 9, 9 or can be additional motors adapted in particular for the drive of the motor vehicle 23. When the battery transport cart 21 is connected to the supporting structure of the motor vehicle 23, the drive motors 22, 22 are coupled to the drive wheels 26, 26 of the motor vehicle 23 via coupling pieces 24, 24 into which drive shafts 25, 25 of the drive wheels 26, 26 are inserted (FIG. 6A). To release the battery transport cart 21, the drive shafts 25, 25 are pulled out of the coupling pieces 24, 24 (FIG. 6B). In this embodiment, the production of an electrical connection between the battery transport cart 21 and the motor vehicle 23 is unnecessary or can be effected in a simplified form since there is no need to transmit drive power, but merely the much lower currents for powering other electrical consumers of the motor vehicle 23. The battery transport cart 21 and the motor vehicle 23 are moreover constructed according to the first embodiment, as described above.

(19) As illustrated in a cross-section in FIG. 7, the crawlers 8, 8 can, according to a third embodiment of the disclosure, be pivotably connected to the chassis frame of the battery transport cart 27 in an articulated manner and be pivoted upwards to lift off the floor (arrows 28, 28). To facilitate the upward pivoting, it is furthermore provided in this embodiment that the battery transport cart 27 is lifted (arrow 30) as or after it is integrated and locked in the supporting structure of the motor vehicle 29. In this embodiment of the disclosure, the battery transport cart 27 can be designed without an adjusting mechanism and the upper part together with the lower part can form a unit to which the hood parts 6, 6 are connected in an articulated manner. The battery transport cart 27 and the motor vehicle 29 are moreover constructed according to the first exemplary embodiment, as described above.

(20) For the sake of clarity, not all reference signs are illustrated in all figures. Reference signs that are not explained with reference to a figure have the same significance as in the other figures.

(21) While exemplary embodiments are described above, it is not intended that these embodiments describe all possible forms of the disclosure. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure. Additionally, the features of various implementing embodiments may be combined to form further embodiments of the disclosure.