JP5590067B2 - Charge / discharge device - Google Patents

Description

  The present invention relates to a technology of a charging / discharging device that is a device for simultaneously charging and discharging a plurality of unit cells in a stacked state.

Conventionally, at the time of initial charging in the manufacturing process of the secondary battery, while forming a uniform film on the electrode surface, for the purpose of diffusing the gas generated accompanying the film formation, etc. It is necessary to pressurize the stacked battery group in the stacking direction.
In addition, the battery group pressurized in such a stacking direction is hereinafter referred to as a single battery unit.

  When such a single cell unit is initially charged (or when measuring the voltage of each single cell after the initial charge, etc.), it is necessary to simultaneously bring a plurality of probes into contact with the terminals of each single cell. is there.

A technique related to a device (hereinafter referred to as a charge / discharge device) for simultaneously charging / discharging a plurality of single cells constituting a single cell unit by simultaneously bringing a plurality of probes into contact with the terminals of each single cell is known. For example, the technique is disclosed in Patent Document 1 shown below and is publicly known.
In the charging / discharging device shown in Patent Document 1, the charging / discharging device is configured such that the unit cell unit is held in such a manner that the terminal of each unit cell protrudes upward, and the probe can be displaced in the vertical direction. In this configuration, each probe is brought into contact with each terminal by lowering each probe from a state in which each probe is arranged immediately above each terminal, and each single cell is charged and discharged simultaneously.

JP 2010-140844 A

The charging / discharging device shown in Patent Document 1 includes a restraining jig that is a jig for holding the unit cell unit.
And in such a restraining jig in the charging / discharging device, in order to ensure positioning accuracy in a direction orthogonal to the stacking direction of the single battery units (hereinafter referred to as the width direction), the restraining jig and the single battery unit The gap in the width direction is set small.

  However, if the gap in the width direction between the restraining jig and the single battery unit is set small, there is a problem that workability (transferability) when the single battery unit is transferred to the restraining jig is deteriorated.

  In addition, if the gap in the width direction between the restraining jig and the unit cell unit is increased, the transfer workability is improved, but each unit cell constituting the unit cell unit can be displaced in the width direction, and each unit cell can be displaced. Since the arrangement varies in the width direction, there is a problem that it is difficult to position the probe with respect to each terminal of each unit cell.

  The present invention has been made in view of such a problem of the present situation, and improves the transferability of the unit cell to the restraining jig and secures the positioning accuracy of each unit cell in the restraining jig in the width direction. It aims at providing the charging / discharging apparatus provided with the restraining jig which can do.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a plurality of single cells and a plurality of spacers are alternately arranged to be stacked in the thickness direction and pressurized in the stacking direction to restrain the plurality of single cells and the plurality of spacers. It is a charging / discharging device comprising a restraining jig that is a jig, wherein the restraining jig includes a pair of side plates that form wall portions along both side surfaces in the width direction of the plurality of spacers, and the pair of side plates. The first and second connection members, which are a pair of members connecting both ends in the stacking direction of the plurality of unit cells, and the second connection member can be displaced in the stacking direction of the plurality of unit cells. A movable wall that is a wall portion that is displaceable in a stacking direction of the plurality of single cells, and is pressed by a displacement member that is a member supported by the plurality of unit cells, and the pair of side plates are stacked In the width direction of the unit cell The first connecting member and the movable wall to narrow the plurality of single cells and the plurality of spacers with respect to the first connecting member, Stress toward the outside in the stacking direction of the plurality of single cells acts, and the second connecting member is interposed in the stacking direction of the plurality of single cells via the movable wall and the displacement member. When an outward stress is applied, the arc shape is deformed so as to be substantially linear, and a pair of substantially parallel wall portions are formed.

  As effects of the present invention, the following effects can be obtained.

  In Claim 1, a single cell can be easily transferred with respect to a charging / discharging apparatus, ensuring the positioning precision to the width direction of the several laminated | stacked single cell.

The side view (Y-axis direction view) schematic diagram which shows the whole structure of the charging / discharging apparatus which concerns on one Embodiment of this invention. The front (X-axis direction view) schematic diagram which shows the whole structure of the charging / discharging apparatus which concerns on one Embodiment of this invention. The schematic diagram which shows the relationship between the cell and the spacer in the charging / discharging apparatus which concerns on one Embodiment of this invention, (a) Side surface (Y-axis direction view) schematic diagram, (b) Plane (Z-axis direction view) schematic diagram. The schematic diagram which shows the restraint jig | tool which comprises the charging / discharging apparatus which concerns on one Embodiment of this invention, (a) Front (X-axis direction view) schematic diagram, (b) Partial perspective schematic diagram. The plane schematic diagram which shows the restraint jig (before restraint-at the time of restraint) which comprises the charging / discharging apparatus which concerns on one Embodiment of this invention. The schematic diagram which shows the positioning condition of the cell using the charging / discharging apparatus which concerns on one Embodiment of this invention, (a) The schematic diagram which shows the condition of the battery pallet before positioning, (b) The condition of the battery pallet at the time of positioning FIG.

Next, embodiments of the invention will be described.
First, the whole structure of the charging / discharging apparatus which concerns on one Embodiment of this invention is demonstrated using FIGS. 1-3.
In the following description, for convenience of explanation, an XYZ coordinate system consisting of a horizontal and orthogonal X-axis and Y-axis and a vertical Z-axis as shown in FIGS. The XYZ coordinate axes according to this definition are also displayed as appropriate in the subsequent drawings.

  As shown in FIG. 1 and FIG. 2, a charging / discharging device 1 which is a charging / discharging device according to an embodiment of the present invention is a device for charging / discharging a plurality of single cells 2. A pallet 3 and a charge / discharge unit 4 are provided.

Here, first, the configuration of the battery pallet 3 will be described.
The battery pallet 3 is a jig for holding a plurality of single cells 2... In a predetermined posture, and includes a restraining jig 5, a plurality of spacers 6, 6.

  The restraining jig 5 is a jig for restraining a plurality of unit cells 2, 2... Stacked in the thickness direction (that is, forming a unit cell unit). The frame is formed by a pair of side plates 7 and 7 and a pair of connecting members 8 and 9, and a movable wall 10, a displacement member 11 and the like are further attached to the frame.

  The spacer 6 is a member that electrically and thermally insulates the adjacent unit cells 2 and 2 in a restrained state to protect each unit cell 2. , A recess 6b, a guide 6c, and the like.

  The groove 6 a is a part for positioning the single cell 2 adjacent to the spacer 6 with reference to the spacer 6, and the recess 6 b is a part for contacting the side plate 7. The guide 6c is a part for guiding the displacement direction of the spacer 6 itself when the spacer 6 is displaced along the side plates 7 and 7.

  In the battery pallet 3, the spacers 6 are arranged in front and rear in the stacking direction of the single cells 2, 2..., So that the number of the single cells 2, 2. It is set as the structure provided with several spacer 6 * 6 ... which is at least one more number.

  And in the battery pallet 3, as shown in FIG. 1, while arrange | positioning each cell 2 * 2 ... between the connection member 8 and the movable wall 10, before and after each cell 2 * 2 ... In the state where the spacers 6 and 6 are arranged, the movable wall 10 is displaced to the connecting member 8 side, so that the single cells 2 and 2... And the spacers 6 and 6. ··· is configured to narrow pressure.

  That is, in the charging / discharging device 1, a plurality of unit cells 2, 2... And a plurality of units are applied to the unit cells 2, 2. The spacers 6, 6... Are integrally restrained.

And in the charging / discharging apparatus 1, it is set as the structure which arrange | positions the battery pallet 3 so that the stacking direction of each restrained single cell 2 * 2 ... (single cell unit) may become parallel with respect to an X-axis. .
Further, in the charging / discharging device 1, when the plurality of unit cells 2, 2... Are restrained using the battery pallet 3, the width direction of each unit cell 2, 2. And the height direction of each cell 2 * 2 ... is parallel to the Z-axis.

Next, the configuration of the charge / discharge unit 4 will be described.
The charging / discharging unit 4 is a device for energizing a plurality of single cells 2, 2... Constrained by the battery pallet 3 at the same time, and a plurality of probes 22, 22 as shown in FIGS. ..., and a plurality of support members 23, 23, etc. are provided.
The charging / discharging unit 4 includes main body frames 25 and 25 that form a skeleton of the charging / discharging unit 4. The main body frames 25 and 25 support the pair of rails 24 and 24.

The probe 22 is a member for electrically connecting the terminal 2 a of the single battery 2 to a power supply device (not shown) provided in the charging / discharging device 1.
Further, the support member 23 is a member for supporting the probe 22, and a pair of two for each single cell 2 corresponding to each of the terminals 2 a and 2 a existing at two locations in one single cell 2. The configuration is arranged.

The pair of support members 23 and 23 are arranged to be separated from each other by a predetermined distance in the Y-axis direction, and are configured to be supported by separate rails 24.
Each of the pair of support members 23, 23 is provided with a number of sets corresponding to the number of the single cells 2, and a plurality of support members 23, along the rail 24 (number corresponding to the number of the single cells 2). 23... Are supported while being arranged at predetermined intervals in the X-axis direction.

The rail 24 is configured to be supported by the body frames 25 and 25 in a manner that the rail 24 is parallel to the X axis.
The plurality of support members 23, 23... Supported by the rail 24 can be reciprocally displaced along the rail 24 (that is, in a direction parallel to the X axis).

The probe 22 is supported by a holder 23 a attached to the support member 23 so as to protrude vertically downward.
Further, the positions of the probes 22, 22... Relative to the Y-axis direction are the respective terminals 2 a, 2 a,. It corresponds (substantially matches) the position of the base 2b) of 2a with respect to the Y-axis direction.

Furthermore, the charge / discharge unit 4 is supported in a state in which it can be displaced in the Z-axis direction (that is, in the vertical direction) by a displacement device (not shown).
2, the battery pallet 3 is disposed at a predetermined position below the charging / discharging unit 4, and the entire charging / discharging unit 4 is displaced vertically downward to thereby each of the probes 22, 22 ... Can be brought into contact with the corresponding terminals 2a, 2a (more specifically, the base 2b of the terminal 2a) from above.

In the charging / discharging device 1 exemplified in the present embodiment, the probe 22 is brought into contact with the base portion 2b of the terminal 2a from above by bringing the charging / discharging unit 4 closer to the battery pallet 3 from above. However, the charging / discharging device according to the present invention is not limited by the contact direction of the probe with respect to the terminal.
That is, in the charging / discharging device according to the present invention, the probe may be brought into contact with the terminal by bringing the charging / discharging unit closer to the battery pallet, for example, obliquely or laterally.

Here, the relationship between the unit cell 2 and the spacer 6 in the charge / discharge device 1 will be described with reference to FIG.
As shown in FIGS. 3 (a) and 3 (b), grooves on both side surfaces in the stacking direction of the spacer 6 have a width (but slightly larger) that is parallel to the Z-axis direction and substantially equal to the width of the unit cell 2. 6a is formed.
The unit cell 2 can be fitted into the groove 6 a of the spacer 6.
That is, the unit cell 2 and the spacer 6 have a so-called inlay structure, and the unit cell 2 and the spacer 6 are positioned relative to each other in the Y-axis direction by fitting the unit cell 2 in the groove 6a. ing.

When the spacer 6 is displaced in the Y-axis direction, the groove 6a engages the unit cell 2, so that the unit cell 2 is displaced in the Y-axis direction as the spacer 6 is displaced.
Further, when the spacer 6 is displaced to the X axis direction negative side, the spacer 6 and the unit cell 2 can be separated from each other. When the spacer 6 is displaced to the X axis direction positive side, the unit cell 2 is pressed by the spacer 6. be able to.

Next, the configuration of the restraining jig 5 in the charge / discharge device 1 will be described in more detail with reference to FIGS. 1, 4, and 5.
As shown in FIG. 1, the side plate 7 constituting the frame of the restraining jig 5 is larger than the length in the stacking direction of the plurality of single cells 2, 2... And the plurality of spacers 6, 6. It is a member produced | generated from a long flat member.
In addition, the side plate 7 according to the present embodiment is configured to be generated from a metal flat plate.

  As shown in FIGS. 4 (a) and 4 (b), the side plate 7 is formed by bending the flat plate with a fold parallel to the length direction, and a convex portion 7a, which is a concavo-convex portion substantially parallel to the length direction, and a guide. A groove 7b, a lower end 7c, and the like are formed.

  Further, the side plate 7 is used by being arranged substantially in parallel so that the protruding directions of the convex portions 7a and 7a of the pair of side plates 7 and 7 face each other, and a plurality of side plates 7 stacked by a pair of lower end portions 7c and 7c facing each other. Are configured to be supported from below.

  In the restraining jig 5, the lower surfaces 7c and 7c of the side plates 7 and 7 and the upper surfaces of the projections 7a are parallel to the XY plane (that is, horizontal), and the connecting members 8 and 9 are X It arrange | positions so that it may become the direction substantially orthogonal to an axis | shaft.

The convex portion 7 a of the side plate 7 is a portion that is bent into a convex shape so as to protrude toward the side surface of the spacer 6, and is a portion that is brought into contact with the concave portion 6 b formed on the side surface of the spacer 6.
The guide groove 7b is formed to guide the spacer 6 so that the spacer 6 is accurately displaced in the X-axis direction when the spacer 6 is displaced in the length direction of the side plate 7 (that is, the X-axis direction). It is a groove-like portion, and has a height (position in the Z-axis direction) corresponding to the guide portion 6c formed on the side surface of the spacer 6 with a width (however slightly larger) substantially equal to the height of the guide portion 6c. Forming.

  The side plates 7 and 7 have a pair of convex portions 7a and 7a in which a plurality of unit cells 2 and 2 and a plurality of spacers 6 and 6 are stacked. It arrange | positions so that it may be located in the outer side in the width direction of this, and it is set as the structure which controls the position in the Y-axis direction of several spacers 6 * 6 ... by each convex part 7a * 7a.

  Further, at this time, the pair of guide grooves 7b and 7b in the side plates 7 and 7 are formed in the guide portions 6c and 6c formed on the outer side in the width direction of the plurality of stacked spacers 6 and 6. The spacers 6, 6... Can be displaced in the X-axis direction along the guide grooves 7b, 7b.

As shown in FIG. 5, of the pair of connection members 8 and 9, the connection disposed at one end in the length direction (each end on the most negative side in the X-axis direction) with respect to the pair of side plates 7 and 7. The member 8 (hereinafter referred to as the first connecting member 8) is a member that connects one end portions of the pair of side plates 7 and 7.
The first connecting member 8 is the most negative in the X-axis direction of the stacked body when the restraining jig 5 restrains the plurality of single cells 2... And the plurality of spacers 6. It is also a member that plays a role in regulating the position of the side.

Further, the other connecting member 9 (hereinafter referred to as the second connecting member 9) disposed at the other end in the length direction of the pair of side plates 7, 7 (each end on the most positive side in the X-axis direction). Is a member for connecting each end on the most positive side in the X-axis direction to the pair of side plates 7.
Further, the second connecting member 9 is configured such that when the plurality of single cells 2... And the plurality of spacers 6, 6. It plays the role which supports the displacement member 11 which is a member for pressurizing from above so that a displacement is possible.
In the restraining jig 5, as shown in FIG. 1, the displacement member 11 pressurizes the plurality of single cells 2, 2... And the plurality of spacers 6, 6. It is said.

As shown in FIG. 1, the displacement member 11 is a member for pressing the movable wall 10 to the negative side in the X-axis direction. It is a shaft-shaped member.
With such a configuration, the first connecting member 8 and the movable wall 10 narrow the plurality of single cells 2... And the plurality of spacers 6. When stress toward the positive side in the direction acts, the stress acts on the second connecting member 9 via the displacement member 11.

As described above, the restraining jig 5 is configured to form a substantially rectangular frame in a plan view by the pair of side plates 7 and 7 and the pair of connection members 8 and 9.
As shown in FIG. 5, in the restraining jig 5, the side plates 7 and 7 are curved so as to bulge outward in the width direction of the restraining jig 5 in a steady state.

Such a side plate 7 can be generated by, for example, pressing a linear shape (side plate) and plastically deforming it into a predetermined arc shape.
As shown in the upper diagram of FIG. 5, the side plate 7 has a substantially arc shape in a steady state (a state where no moment or the like is applied to the side plate 7), and both ends of the side plate 7. When a bending moment is generated in the portion, as shown in the lower diagram of FIG. 5, it can be elastically deformed into a substantially linear shape.

In the restraining jig 5, the connecting members 8 and 9 that connect the side plates 7 and 7 are also configured as members having a substantially arc shape that curves in the length direction of the restraining jig 5. .
And each connection member 8 * 9 is set as the structure joined by techniques, such as welding, so that the angle which each member may make may be kept constant in the connection part with each side plate 7 * 7, as shown in FIG. .
In the present embodiment, the angle formed by the first connecting member 8 and the side plates 7 and 7 is 90 degrees (right angle), and the angle formed by the second connecting member 9 and the side plates 7 and 7 is 90 degrees (right angle). ).

  In the restraining jig 5 having such a configuration, when the plurality of single cells 2 ··· and the plurality of spacers 6 · 6 ··· are narrowed between the first connection member 8 and the movable wall 10, The first connecting member 8 is pressed so as to bend to the negative side in the X-axis direction by the reaction force received from the laminate, and the second connecting member 9 is pressed so as to be bent to the positive side in the X-axis direction.

  For this reason, each connection member 8 and 9 is maintaining a substantially circular arc-shaped shape in the steady state (the state where each cell 2, 2... Is not narrowed between the connection members 8 and 9). When each unit cell 2, 2... Is narrowed, it is elastically deformed in a substantially straight line, and is configured so that bending moments M and M can be applied to the members connected to both ends of each connection member 8 and 9, respectively. Has been.

Then, in the restraining jig 5, as shown in the lower diagram of FIG. Can act.
Then, in the restraining jig 5, the side plates 7 and 7 are deformed by the bending moment M and M so as to be substantially linear (that is, the side plates 7 and 7 are not curved). The side plates 7, 7 can be made substantially parallel to each other.

In addition, in this embodiment, although the case where each 1st and 2nd connection member 8 * 9 is the curved shape is illustrated, the connection member in the restraint jig which comprises the charging / discharging apparatus which concerns on this invention is illustrated. The embodiment is not limited to this.
That is, for example, each connection member is configured by a member having a linear shape that is not curved, and when each connection member is subjected to stress toward the outside in the stacking direction of the unit cells, It is good also as a structure which gives a bending moment to the both ends of a pair of side plate by making it deform | transform so that it may curve toward the outer side.

In this way, each connecting member may be configured so that the angle formed between the side plate and the connecting member can be kept constant at the connecting portion between the side plate and the connecting member, and the angle formed between the side plate and the connecting member at this time is not necessarily 90 degrees ( It does not have to be a right angle), and may be an aspect that can impart a bending moment to both end portions of the side plate.
Here, “the angle formed can be kept constant” does not mean that the angle formed between the side plate and the connecting member is strictly constant in the connection portion, and the side plate can be deformed into a substantially linear shape. As long as the angle at which the bending moment can be applied can be maintained, the connecting member may be elastically deformed with respect to the side plate at the connecting portion, and the angle formed by the side plate and the connecting member may slightly vary.

  Further, in the present embodiment, the connecting member is configured to eliminate the curved shape of the side plate by applying a bending moment to the end portion of the side plate. For example, the connecting member is displaced in a direction parallel to the X axis. Thus, it is possible to eliminate the curved shape of the side plate by applying tension in the direction parallel to the X axis to the end of the side plate.

  Although the side plate 7 shown in the present embodiment is made of metal, the material of the side plate in the restraining jig constituting the charge / discharge device according to the present invention is not limited to this, and a predetermined arc shape can be formed. In addition, any material having rigidity sufficient to withstand the stress generated when each unit cell is pressed may be used. For example, the side plate may be made of resin.

Next, the positioning situation of each single cell 2 in the charging / discharging device 1 will be described with reference to FIG.
As shown in FIG. 6 (a), a plurality of unit cells 2, 2,... And a plurality of spacers 6, 6,. In the previous situation, the side plates 7 are curved so as to bulge outward in the width direction of the single cells 2.

  In this state, the distance between the convex portions 7a and 7a facing each other on the side plates 7 and 7 has a margin as compared to the width between the concave portions 6b and 6b of the spacer 6 (so that the spacer 6 can be displaced in the Y-axis direction). Has been expanded).

  Therefore, in this state, the unit cell 2 and the spacer 6 can be easily transferred (inserted / removed) from / to the restraining jig 5, and the charging / discharging device 1 can charge / discharge a plurality of unit cells 2, 2,. In the case of performing the above, the transfer operation of the unit cell 2 with respect to the restraining jig 5 can be easily performed.

Further, in this state, the arrangement of the single cells 2 in the Y-axis direction varies, and the terminals 2a 2a in the single cells 2 2. The position of 2b (see FIG. 2) also varies.
Therefore, for example, when the terminals 2a, 2a,... Are in an arrangement state as shown in FIG. 6A, the probes 22, 22 ... provided in the charge / discharge unit 4 (FIGS. 1, 2). It is difficult to reliably contact each of the bases 2b, 2b... Of the corresponding terminals 2a, 2a.

Next, as shown in FIG. 6B, the displacement member 11 is displaced to the negative side in the X-axis direction, and the plurality of single cells 2... And the plurality of spacers 6. The pressure is narrowed between 10 and the first connecting member 8.
In this way, when a predetermined pressure is applied to each of the single cells 2... And the spacers 6, 6..., The connection members 8 and 9 are deformed so as to be substantially linear, and each side plate Bending moments M and M are applied to both ends of 7 and 7 from the connecting members 8 and 9, respectively.

Then, at this time, the side plates 7 and 7 are deformed so that the curved shape is eliminated, and the convex portions 7a and 7a of the side plates 7 and 7 are both deformed into a substantially linear shape, and are substantially the same with respect to the X axis. Parallel.
In this state, the distance between the convex portions 7 a and 7 a facing each other in the restraining jig 5 is reduced so as to substantially match the width between the concave portions 6 b and 6 b of the spacer 6.

Then, at this time, the spacers 6, 6... Are pressed in the Y-axis direction by the convex portions 7 a, 7 a of the side plates 7, 7. It is positioned at a position along.
As each spacer 6... Is positioned, each unit cell 2... That is locked by each spacer 6. The arrangement is corrected.
Further, at this time, since the convex portions 7a and 7a are deformed so as to be substantially parallel to the X axis, the terminals 2a, 2a, and the like whose arrangement is corrected along the convex portions 7a and 7a. .. is also modified so that it is substantially parallel to the X axis.

In the state shown in the lower part of FIG. 6, the arrangement of the single cells 2, 2... In the Y-axis direction is aligned, and the positions of the terminals 2 a, 2 a. Are aligned on a substantially straight line.
Then, by arranging the terminals 2a, 2a, etc. in this way, the bases of the corresponding terminals 2a, 2a,. 2b, 2b (see FIG. 2) can be reliably brought into contact with each other.

  That is, the charging / discharging device 1 according to an embodiment of the present invention stacks a plurality of single cells 2... And a plurality of spacers 6. , And a restraining jig 5 that is a jig for restraining each of the single cells 2, 2... And each of the spacers 6, 6. A pair of side plates 7 and 7 that form walls along both side surfaces (for example, recesses 6b and 6b, guide portions 6c and 6c, etc.) in the width direction of the spacers 6 and 6; The first and second connecting members 8 and 9 which are a pair of members for connecting both end portions in the stacking direction of the single cells 2 and 2. Each cell 2 is pressed by a displacement member 11 that is a member supported so as to be displaceable in the stacking direction. 2 and a movable wall 10 that is a wall portion that is displaceable in the stacking direction, and the side plates 7 and 7 are arranged on the outer side in the width direction of the stacked single cells 2. The first connecting member 8 and the movable wall 10 narrow the individual cells 2, 2... And the spacers 6, 6. On the other hand, the outward stress in the stacking direction of the individual cells 2, 2... Acts, and the individual cells are applied to the second connection member 9 via the movable wall 10 and the displacement member 11. When the outward stress in the stacking direction of 2 · 2 ··· acts, the arc shape is deformed so as to be substantially linear, and a pair of substantially parallel wall portions (that is, a pair of convex portions 7a). -7a) is formed.

  With such a configuration, the charging / discharging device 1 (more specifically, the battery pallet 3 of the battery pallet 3) is secured while ensuring the positioning accuracy in the width direction (that is, the Y-axis direction) of the plurality of stacked single cells 2. The single cells 2... Can be easily transferred to the restraining jig 5).

Moreover, the mechanism (in this embodiment, each connection member 8 * 9, the movable wall 10, the displacement member 11 etc.) which pressurizes each unit cell 2 * 2 ... in a lamination direction is provided also in the conventional charging / discharging apparatus. In the charging / discharging device 1, a mechanism for positioning the single cells 2, 2... With respect to the Y-axis direction is realized by utilizing this pressurizing mechanism.
For this reason, the structure of the charging / discharging apparatus 1 is a simple structure equivalent to the conventional charging / discharging apparatus.

  In the present embodiment, a charging / discharging device in which the side plate is made of metal is illustrated, and from the viewpoint of preventing heat bridge, a spacer made of resin is brought into contact with the side plate, and the unit cell is interposed by the side plate through the spacer. However, when the side plate is made of resin, the side plate and the unit cell may be directly contacted to position the unit cell.

DESCRIPTION OF SYMBOLS 1 Charging / discharging apparatus 2 Cell 3 Battery pallet 4 Charging / discharging unit 5 Restraint jig 6 Spacer 7 Side plate 7a Convex part 8 First connection member 9 Second connection member 10 Movable wall 11 Displacement member

Claims (1)

A restraining jig that is a jig for restraining the plurality of single cells and the plurality of spacers by laminating in the thickness direction while alternately arranging the plurality of single cells and the plurality of spacers,
A charging / discharging device comprising:
The restraining jig is
A pair of side plates forming walls along both side surfaces in the width direction of the plurality of spacers;
A first and a second connecting member that are a pair of members that connect both ends of the pair of side plates in the stacking direction of the plurality of unit cells;
A wall portion that is pressed by a displacement member that is supported by the second connection member so as to be displaceable in the stacking direction of the plurality of unit cells, and that is displaceable in the stacking direction of the plurality of unit cells. A movable wall,
With
The pair of side plates is
An arc shape protruding toward the outside in the width direction of the plurality of unit cells stacked,
The plurality of single cells and the plurality of spacers are narrowed by the first connection member and the movable wall, and are directed outward in the stacking direction of the plurality of single cells with respect to the first connection member. When stress acts and stress toward the outside in the stacking direction of the plurality of unit cells acts on the second connection member via the movable wall and the displacement member,
The arc shape is deformed so as to be substantially linear, and a pair of substantially parallel walls are formed.
A charge / discharge device characterized by the above.

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