Contact function-equipped multichannel charge/discharge power supply with voltage measurement

Abstract

A contact function-equipped multichannel charge/discharge power supply has: first and second charge/discharge probes respectively connected to positive and negative electrodes of secondary batteries and first and second voltage-measurement probes, respectively connected to the positive and negative electrodes of the batteries; and charge/discharge means each provided for each of the batteries and each connected to a pair of the first and second charge/discharge probes. The power supply includes: trays each having a right-angled-quadrilateral shape in plan view, in which the batteries are arranged longitudinally and laterally at predetermined intervals; and substrates each having the charge/discharge means provided along the batteries arranged in each line in one direction, wherein the substrates are each provided with the first and/or second charge/discharge probes corresponding to the batteries arranged in each line in the one direction.

Claims

1. A contact function-equipped multichannel charge/discharge power supply for performing charge/discharge testing of secondary batteries, the contact function-equipped multichannel charge/discharge power supply comprising: a casing, into which a plurality of the secondary batteries are carried in a tray in a state where the secondary batteries are arranged longitudinally and laterally in lines at regular intervals in a plan view of the tray; first and second charge/discharge probes respectively connected to positive and negative electrodes of the secondary batteries and first and second voltage-measurement probes respectively connected to the positive and negative electrodes of the secondary batteries; charge/discharge means each provided for each of the secondary batteries, each of the charge/discharge means being connected to a pair of the first and second charge/discharge probes; substrates, each of the substrates extending longitudinally in the plan view of the tray for each line of the secondary batteries arranged longitudinally in the plan view of the tray, the substrates being arranged side by side laterally in the plan view of the tray, with gaps between each side by side pair of the substrates; charge/discharge units formed by integrating, by one each, the charge/discharge means and the first and/or second charge/discharge probes each connected to each of the charge/discharge means, the charge/discharge units being arranged side by side longitudinally in the plan view of the tray on each of the substrates, with each of the charge/discharge units corresponding to each of the secondary batteries arranged longitudinally in the plan view of the tray; and fans provided on one side of each of the gaps, each of the fans being provided at one end of each of the gaps extending longitudinally in the plan view of the tray, the fans suppressing heat energy generated by each of the charge/discharge means from interfering with the charge/discharge testing of the secondary batteries.

2. The contact function-equipped multichannel charge/discharge power supply according to claim 1, wherein the positive and negative electrodes of each of the secondary batteries are provided on an upper side of the secondary battery, and the first and second charge/discharge probes are disposed above the secondary batteries, each integrated together with a corresponding one of the charge/discharge means, and provided on the substrates.

3. The contact function-equipped multichannel charge/discharge power supply according to claim 1, wherein each of the charge/discharge means is thermally insulated from the first and second charge/discharge probes corresponding thereto and from the first and second voltage-measurement probes corresponding thereto.

4. The contact function-equipped multichannel charge/discharge power supply according to claim 2, wherein each of the charge/discharge means is thermally insulated from the first and second charge/discharge probes corresponding thereto and from the first and second voltage-measurement probes corresponding thereto.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is an explanatory drawing illustrating a contact function-equipped multichannel charge/discharge power supply according to a first embodiment of the present invention.

(2) FIG. 2 is a plan view of FIG. 1.

(3) FIG. 3 is an explanatory drawing illustrating a contact function-equipped multichannel charge/discharge power supply according to a second embodiment of the present invention.

(4) FIG. 4 is a plan view of FIG. 3.

(5) FIG. 5 is an explanatory drawing illustrating a charge/discharge evaluation apparatus for secondary batteries according to a conventional example.

DESCRIPTION OF EMBODIMENTS

(6) Embodiments of the present invention will be described next with reference to the accompanying drawings to provide an understanding of the present invention.

(7) As shown in FIG. 1, a contact function-equipped multichannel charge/discharge power supply (i.e. a charge/discharge test apparatus for secondary batteries) 10 according to the first embodiment of the present invention includes: first charge/discharge probes 12 and first voltage-measurement probes 14 connected to positive electrodes of, e.g., a plurality of cylindrical secondary batteries 11; second charge/discharge probes 13 and second voltage-measurement probes 15 connected to negative electrodes of the secondary batteries 11; and charge/discharge means 16 each provided for each of the secondary batteries 11 and each connected to a pair of the first and second charge/discharge probes 12, 13. With the contact function-equipped charge/discharge power supply 10, good test results can be obtained, the adverse effects caused by using the cables can be resolved, and additionally, the apparatus structure can be made more compact. More detailed explanations will be provided below.

(8) The contact function-equipped charge/discharge power supply (hereinafter, also referred as just to “the charge/discharge power supply”) 10 includes a casing (not shown in the figure) that is capable of accommodating a plurality of trays 11a (one of the trays 11a is shown in FIG. 1), in each of the trays 11a a plurality of the secondary batteries 11 are arranged in lines, in a manner where the trays 11a are placed at intervals in the height direction (where the trays 11a are placed in a plurality of stages in the height direction).

(9) An open/close door is provided on the front side of the casing, and the trays 11a can be carried into and out from the casing by opening and closing the door. Note that although the carrying into/out of the trays 11a is done by sliding the trays 11a using, e.g., a carrying means, the present invention is not limited to it. Additionally, the casing may be an open type one without the open/close door.

(10) Each of the trays 11a is a frame body that has a right-angled-quadrilateral (rectangular or square) shape in plan view (see FIG. 2), and also has openings at its top and bottom. Each of the trays 11a accommodates and holds a plurality of the secondary batteries 11 in a manner where the secondary batteries 11 are arranged longitudinally and laterally (in the depth and lateral directions of FIG. 1, i.e., in a matrix state with columns and rows) at regular intervals (predetermined intervals). More concretely, with each of the trays 11a, holding frames (holders) for holding and positioning the secondary batteries 11 are provided longitudinally and laterally such that gaps are formed between the secondary batteries 11 next to one another. (The number of the holding frames is equal to the maximum number of the secondary batteries 11 that can be accommodated.)

(11) In FIG. 1, one of the lines of the secondary batteries 11 in the depth direction (one line in one direction) is set as a column, and a state where a plurality of the columns of the secondary batteries 11 are arranged in the lateral direction is illustrated (only one row) (it is also the case in FIG. 3 described below).

(12) Although ways to arrange the secondary batteries in the trays 11a are not particularly limited, the secondary batteries can be arranged by a plural number each, e.g., 16 each, at intervals in the depth and lateral directions of FIG. 1 (in this case, 16×16=256, 256 of the secondary batteries are arranged).

(13) Above each of the trays 11a inside the casing, a plurality of charge/discharge units 17 each provided for each of the secondary batteries 11 are disposed.

(14) Each of the charge/discharge units 17 is placed over a corresponding one of the secondary batteries 11, and is formed by integrating: one of the charge/discharge means 16 that are CC-CV (Constant Current-Constant Voltage) type ones; one each of the first charge/discharge probes 12 and the first voltage-measurement probes 14 both connected to the one of the charge/discharge means 16 and connectable to the positive electrode of the corresponding one of the secondary batteries 11. Therefore, the charge/discharge units 17 (each of which has the charge/discharge means 16, the first charge/discharge probe 12, and the first voltage-measurement probe 14) exist by the number corresponding to the maximum number of the secondary batteries 11 accommodated by one of the trays 11a (i.e., the number of the charge/discharge units 17 is the same as the number of the secondary batteries 11 that each of the trays 11a can accommodate).

(15) Incidentally, the charge/discharge units 17 are attached to below-described substrates 17a so as to be un-detachable from the substrates 17a; however, they may be attached so as to be detachable and re-attachable.

(16) Furthermore, the first charge/discharge probe 12 and the first voltage-measurement probe 14 in each of the charge/discharge units 17 are separately independently provided; however, they may be configured (made common) as one probe.

(17) The charge/discharge units 17 are arranged in a plurality of columns so as to be corresponding to positions of the secondary batteries 11 arranged in a plurality of the columns (an arrow “a” in FIG. 2 shows the direction of the columns). A plurality of the charge/discharge units 17 (charge/discharge means 16) composing each of the columns (and corresponding to the secondary batteries 11 in each of the columns) are formed on a substrate 17a. That is, the secondary batteries 11 are arranged in lines in one direction, the substrates 17a are each provided along the secondary batteries 11 arranged in each of the lines, and each of the substrates 17a has the charge/discharge means 16, the first charge/discharge probes 12, and the first voltage-measurement probes 14, all of which are corresponding to the secondary batteries 11 arranged in each of the lines in the one direction. Therefore, a plurality of the substrates 17a are disposed with gaps 17b in the lateral direction.

(18) The substrates 17a are printed circuit boards; however, they may be flexible circuit boards, and this makes it possible to absorb slight discrepancies (deviations) between pitches (gaps) of the charge/discharge units 17 and that of the secondary batteries 11. Alternatively, those discrepancies in the pitches can be dissolved also by connecting with connecters the charge/discharge means 16, the first charge/discharge probe 12, and the first voltage-measurement probe 14 in each of the charge/discharge units 17.

(19) On each of the substrates 17a, electric wiring for transmitting and receiving of electric signals between each of the charge/discharge means 16 and a charge/discharge controller (an example of a control unit) 18 disposed outside is formed. Incidentally, the charge/discharge controller 18 is a computer disposed outside the casing, and manages charging currents, charging voltages, discharging currents, and discharging voltages for each of the secondary batteries 11.

(20) A connecting terminal (not shown in the figure) is formed at an end portion (on the deeper side of FIG. 1) of each of the substrates 17a. By attaching the connecting terminal to a socket (not shown in the figure) disposed in a fixed state on the deeper side (back side) inside the casing, the transmitting and receiving the electric signals between the charge/discharge means 16 and the charge/discharge controller 18 is made to be possible.

(21) Below each of the trays 11a inside the casing, contact units 19 are disposed.

(22) The contact units 19 are each placed under each of the secondary batteries 11, and each of the contact units 19 is formed by integrating one each of: the second charge/discharge probes 13 and the second voltage-measurement probes 15 both connectable to the negative electrode of a corresponding one of the secondary batteries 11. Therefore, the contact units 19 (each of which has the second charge/discharge probe 13 and the second voltage-measurement probe 15) exist by the number corresponding to the maximum number of the secondary batteries 11 accommodated by one of the trays 11a (i.e., the number of the contact units 19 is the same as the number of the secondary batteries 11 that each of the trays 11a can accommodate).

(23) Incidentally, the second charge/discharge probe 13 and the second voltage-measurement probe 15 in each of the contact units 19 are separately independently provided; however, they may be configured (made common) as one probe.

(24) The trays 11a for accommodating the secondary batteries 11, and the above-described contact units 19 can be each moved up and down with an independent lifting up/down means (not shown in the figure).

(25) This makes it possible to connect (attach) and detach the first charge/discharge probes 12 and the first voltage-measurement probes 14 to/from the positive electrodes of the secondary batteries 11, and also to connect (attach) and detach the second charge/discharge probes 13 and the second voltage-measurement probes 15 to/from the negative electrodes of the secondary batteries 11.

(26) Additionally, by positioning each of the first and second charge/discharge probes 12, 13 and each of the first and second voltage-measurement probes 14, 15 at a central portion of a corresponding one of the secondary batteries 11 in plan view, the probes can be connected to the electrodes with no fail even if some deviations occur in relative positions among the positive and negative electrodes of the secondary batteries 11, the first and second charge/discharge probes 12, 13, and the first and second voltage-measurement probes 14, 15. Note that it is preferred in this embodiment that the substrates 17a provided with the charge/discharge units 17 each formed, so as to be corresponding to the secondary batteries 11 arranged in each of the lines in the one direction, by integrating one each of: the first charge/discharge probes 12; the first voltage-measurement probes 14; and the charge/discharge means 16, be disposed in a fixed state. However, the substrates 17a with the charge/discharge units 17 formed may be made to be movable up and down.

(27) For the first charge/discharge probes 12 and the first voltage-measurement probes 14, an insulator 20 made from a resin or else is provided for each of the columns such that lower portions of the probes 12, 14 having penetrated the insulator 20 protrude toward the positive electrodes of the secondary batteries 11.

(28) Also, for the second charge/discharge probes 13 and the second voltage-measurement probes 15, an insulator 21 made from a resin or else is provided for each of the columns such that upper portions of the probes 13, 15 having penetrated the insulator 21 protrude toward the negative electrodes of the secondary batteries 11. Incidentally, the insulators 21 may not be provided.

(29) Since these insulators 20, 21 thermally insulate the charge/discharge means 16 from the first and second charge/discharge probes 12, 13 and the first and second voltage-measurement probes 14, 15, it is possible to suppress or moreover prevent heat energy generated by the charge/discharge means 16 from interfering with the secondary batteries 11.

(30) Also, by providing a fan 22 on the deeper side (one side) of each of the gaps 17b between the substrates 17a next to one another, the heat energy can be suppressed or moreover prevented from interfering with the secondary batteries 11. Note that the fan 22 may not necessarily be provided on the deeper side of every one of the gaps 17b, but may be provided on the deeper side of only some (or one) of the gaps 17b.

(31) Furthermore, since the secondary batteries 11 next to one another have the gaps 17b therebetween, winds from the fan(s) 22 can pass through the gaps 17b.

(32) When using the charge/discharge power supply 10, the first charge/discharge probes 12 and the first voltage-measurement probes 14 are brought into contact to the positive electrodes of the secondary batteries 11, and the second charge/discharge probes 13 and the second voltage-measurement probes 15 are brought into contact to the negative electrodes of the secondary batteries 11.

(33) Subsequently, the charge/discharge controller 18 charges the secondary batteries 11 by applying a voltage power supply supplied from required power supplies to the first and second charge/discharge probes 12, 13 connected to the secondary batteries 11, and/or discharges electric charge having already been charged in the secondary batteries 11 through the first and second charge/discharge probes 12, 13. Also, when charging/discharging of the secondary batteries 11, the charge/discharge controller 18 measures the amount of electric currents flowing through the first and second voltage-measurement probes 14, 15 and inter-terminal voltages of the secondary batteries 11, that is, the electric voltages between the first and second voltage-measurement probes 14, 15.

(34) Here, the charge/discharge controller 18 can regenerate the discharged currents output from the secondary batteries 11 and prepare for the next supply of the charging currents.

(35) Further, charging/discharging patterns can be changed according to input signals input from, e.g., a control panel provided on the front surface of the casing and also according to programs of the charge/discharge controller 18.

(36) The charge/discharge controller 18 can also perform evaluations of the secondary batteries 11, that is, inspections of charge/discharge characteristics by taking data of during the above-described charging/discharging such as current values, voltage values, charging/discharging time or else, from output of the first and second voltage-measurement probes 14, 15.

(37) As described above, in the charge/discharge power supply 10, the charge/discharge means 16, the first charge/discharge probes 12, and the first voltage-measurement probes 14 are integrated by one each. Thus, the cables conventionally used can be eliminated. Also, especially regarding the secondary batteries 11 and the second charge/discharge probes 13 (also the second voltage-measurement probes 15 in some cases), the cables conventionally used can be shortened.

(38) This makes it possible to obtain good test results, resolve the adverse effects caused by using longer cables, and additionally, make the apparatus structure more compact.

(39) A method for performing charge/discharge tests of the secondary batteries using the contact function-equipped multichannel charge/discharge power supply 10 according to the first embodiment of the present invention will be explained next, with reference to FIG. 1.

(40) First, in a state where a plurality of the secondary batteries 11 to be test objects are arranged in the trays 11a, each of the trays 11a is carried into a region between the charge/discharge units 17 and the contact units 19 of the charge/discharge power supply 10 and moved up. This makes a plurality of the first charge/discharge probes 12 and a plurality of the first voltage-measurement probes 14 provided with the substrates 17a disposed above the trays 11a be connected to the positive electrodes of the secondary batteries 11, and this also makes a plurality of the second charge/discharge probes 13 and a plurality of the second voltage-measurement probes 15 composing the contact units 19 disposed below the trays 11a be oppositely placed with a gap with respect to the negative electrodes of the secondary batteries 11.

(41) Subsequently, by moving up the contact units 19 (lower fixtures), the second charge/discharge probes 13 and the second voltage-measurement probes 15 are brought into contact with (connected to) the negative electrodes of the secondary batteries 11 under a condition where the first charge/discharge probes 12 and the first voltage-measurement probes 14 are connected to the positive electrodes of the secondary batteries 11.

(42) Then, the secondary batteries 11 are charged and discharged repeatedly to be activated, and the inspections of the charge/discharge characteristics are performed.

(43) After having finished the charge/discharge tests of the secondary batteries 11, by moving down the contact units 19 (alternatively by moving up the substrates 17a), the first charge/discharge probes 12 and the first voltage-measurement probes 14 are detached from the positive electrodes of the secondary batteries 11, while the second charge/discharge probes 13 and the second voltage-measurement probes 15 are detached from the negative electrodes of the secondary batteries 11.

(44) Then, each of the trays 11a is pulled out from the region between the charge/discharge units 17 and the contact units 19 to be carried out from the charge/discharge power supply 10.

(45) After that, the above-described procedures, that is: carrying the trays 11a, in which the secondary batteries 11 to be newly inspected are arranged, into the casing of the charge/discharge power supply 10; and carrying the trays 11a out from the casing of the charge/discharge power supply 10 after finishing the charge/discharge tests, are repeatedly performed.

(46) Next, a contact function-equipped multichannel charge/discharge power supply (i.e. a charge/discharge test apparatus for secondary batteries) 30 according to the second embodiment of the present invention will be explained, with reference to FIG. 3 and FIG. 4. Since the contact function-equipped multichannel charge/discharge power supply 30 has a structure that is almost the same as that of the contact function-equipped multichannel charge/discharge power supply 10 according to the first embodiment of the present invention, identical reference signs will be given to common parts, and regarding these common parts, detailed explanations will be omitted.

(47) The contact function-equipped multichannel charge/discharge power supply (hereinafter, also referred as just to “the charge/discharge power supply”) 30 includes: first charge/discharge probes 12 and first voltage-measurement probes 14 connected to positive electrodes of a plurality of prismatic secondary batteries 31; second charge/discharge probes 13 and second voltage-measurement probes 15 connected to negative electrodes of the secondary batteries 31; and charge/discharge means 16 each provided for each of the secondary batteries 31 and each connected to a pair of the first and second charge/discharge probes 12, 13.

(48) The charge/discharge power supply 30 includes a casing (not shown in the figure) that is capable of accommodating a plurality of trays 31a (one of the trays 31a is shown in FIG. 3), in each of the trays 31a a plurality of the secondary batteries 31 are arranged, in a manner where the trays 31a are placed at intervals in the height direction. By means of an open/close door provided on the front side of the casing, the trays 31a are carried into and out. However, the casing may be an open type one without the open/close door. Each of the trays 31a is a frame body that has a right-angled-quadrilateral (rectangular or square) shape in plan view (see FIG. 4), and also has openings at its top and bottom. Each of the trays 31a accommodates and holds a plurality of the secondary batteries 31 in a manner where the secondary batteries 31 are arranged longitudinally and laterally (in the depth and lateral directions of FIG. 3 in the tray 31a at regular intervals (predetermined intervals). More concretely, with each of the trays 31a, holding frames (holders) for holding and positioning the secondary batteries 31 are provided longitudinally and laterally such that gaps are formed between the secondary batteries 31 next to one another. (The number of the holding frames is equal to the maximum number of the secondary batteries 31 that can be accommodated.)

(49) Above each of the trays 31a inside the casing, a plurality of charge/discharge units 32 each provided for each of the secondary batteries 31 are disposed.

(50) Each of the charge/discharge units 32 is placed over a corresponding one of the secondary batteries 31, and is formed by integrating: one of the charge/discharge means 16; one each of the first charge/discharge probes 12 and the first voltage-measurement probes 14 both connected to the one of the charge/discharge means 16 and connectable to the positive electrode of the corresponding one of the secondary batteries 31; and one each of the second charge/discharge probes 13 and the second voltage-measurement probes 15 both connected to the one of the charge/discharge means 16 and connectable to the negative electrode of the corresponding one of the secondary batteries 31. (The first and second charge/discharge probes 12, 13 and the first and second voltage-measurement probes 14, 15 are disposed above the secondary batteries 31.) Therefore, the charge/discharge units 32 (each of which has the charge/discharge means 16, the first and second charge/discharge probes 12, 13, and the first and second voltage-measurement probes 14, 15) exist by the number corresponding to the maximum number of the secondary batteries 31 accommodated by one of the trays 31a (i.e., the number of the charge/discharge units 32 is the same as the number of the secondary batteries 31 that each of the trays 31a can accommodate).

(51) The charge/discharge units 32 are arranged in a plurality of columns so as to be corresponding to positions of the secondary batteries 31 arranged in a plurality of the columns (an arrow “a” in FIG. 4 shows the direction of the columns). A plurality of the charge/discharge units 32 (charge/discharge means 16) composing each of the columns (and corresponding to the secondary batteries 31 in each of the columns) are formed on a substrate 32a. That is, the secondary batteries 31 are arranged in lines in one direction, the substrates 32a are each provided along the secondary batteries 31 arranged in each of the lines, and each of the substrates 32a has the charge/discharge means 16, the first and second charge/discharge probes 12, 13, and the first and second voltage-measurement probes 14, 15, all of which are corresponding to the secondary batteries 31 arranged in each of the lines in the one direction. Therefore, a plurality of the substrates 32a are disposed with gaps 32b in the lateral direction.

(52) The substrates 32a have a structure that is basically the same as that of the substrates 17a used in the above-mentioned first embodiment of the present invention, and on each of the substrates 32a, electric wiring for transmitting and receiving of electric signals between each of the charge/discharge means 16 and a charge/discharge controller 18 is formed.

(53) Below each of the trays 31a inside the casing, a stage unit for lifting up/down 33 that can be moved up/down with a lifting up/down means (not shown in the figure) is disposed. By means of the stage units for lifting up/down 33, the trays 31a are moved up and down.

(54) This makes it possible to connect (attach) and detach the first charge/discharge probes 12 and the first voltage-measurement probes 14 to/from the positive electrodes of the secondary batteries 31, and the second charge/discharge probes 13 and the second voltage-measurement probes 15 to/from the negative electrodes of the secondary batteries 31.

(55) As described above, in the charge/discharge power supply 30, the charge/discharge units 32, which are each formed by integrating one each of: the charge/discharge means 16; the first and second charge/discharge probes 12, 13; and the first and second voltage-measurement probes 14, 15, are provided on each of the substrates 32a so as to be corresponding to the secondary batteries 11 in each of the columns. Therefore, the cables conventionally used can be partially omitted.

(56) This makes it possible to obtain good test results, resolve the adverse effects caused by using the cables, and additionally, make the apparatus structure more compact.

(57) The present invention has been described above with reference to the embodiments. However, the present invention is not limited to any of the structures described in the above embodiments, and includes other embodiments and modifications conceivable within the scope of the matters described in the scope of the claims. For example, cases where a part/parts of or entirety of the embodiments and modifications described above are combined to configure a contact function-equipped multichannel charge/discharge power supply according to the present invention are also included within the scope of rights of the present invention.

(58) In the above embodiments, lithium ion batteries are used as the secondary batteries. However, not limited to this, e.g., other secondary batteries such as nickel hydrogen batteries, capacitors such as electric dual layer capacitors, or else may be used.

(59) Also, although in one of the above embodiments the secondary batteries are disposed such that the positive electrodes come to upside while the negative electrodes come to downside, it may be opposite (the positive electrodes come to downside while the negative electrodes come to upside). In this opposite case, the charge/discharge units placed above the secondary batteries come to be each formed by integrating: one of the charge/discharge means; and one each of the second charge/discharge probes and the second voltage-measurement probes both connected to the one of the charge/discharge means and connectable to the negative electrode of a corresponding one of the secondary batteries.

(60) Incidentally, the charge/discharge units may be placed below the secondary batteries.

(61) Additionally, in the above embodiments the cases where the charge/discharge means, the first charge/discharge probes, and the second voltage-measurement probes (and moreover, the second charge/discharge probes and the second voltage-measurement probes) are integrated by one each, and provided on each of the substrates, are described. However, the first and second voltage-measurement probes may not necessarily be provided on each of the substrates (i.e., the first and/or second voltage-measurement probes may be provided on each of the substrates). In this case, it is also possible that separately-independent wiring or substrates be provided.

INDUSTRIAL APPLICABILITY

(62) Since the contact function-equipped multichannel charge/discharge power supply according to the present invention enables to eliminate or extremely shorten the cables conventionally used for connecting the power supply unit and the contact unit, good test results can be obtained, the adverse effects caused by using the cables can be resolved, and additionally, the apparatus structure can be made more compact. This makes it possible to respond the rapidly increasing demand for the secondary batteries used for IT appliances such as smart-phones or else and electric cars, and thereby contribute to the development of industry.

REFERENCE SIGNS LIST

(63) 10: contact function-equipped multichannel charge/discharge power supply, 11: secondary battery, 12: first charge/discharge probe, 13: second charge/discharge probe, 14: first voltage-measurement probe, 15: second voltage-measurement probe, 16: charge/discharge means, 17: charge/discharge unit, 18: charge/discharge controller (control unit), 19: contact unit, 20, 21: insulator, 30: contact function-equipped multichannel charge/discharge power supply, 31: secondary battery, 32: charge/discharge unit, 33: stage unit for lifting up/down