Battery stack plate

Abstract

To provide a plate for a battery stack that can suppress falling of a terminal.SOLUTION: A plate 50 for a battery stack includes: a plate-like connection terminal 80 to which an electric wire 85 is connected; and a plate-like housing 51 having a storing recessed part 53 for storing the connection terminal 80. The storing recessed part 53 is provided with a removal stopping hole 54, and the connection terminal 80 has a connection part 83 electrically connected to a conductive plate 40 and a removal stopping piece 84 inserted in the removal stopping hole 54 to engage with the removal stopping hole 54. The removal stopping hole 54 is provided with a wall part 58 between the removal stopping piece 84 and the connection part 83.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a plate for a battery stack. [Background technology]

[0002] Various types of electricity storage devices have been proposed in the past. For example, the electricity storage device disclosed in Patent Document 1 includes a plurality of stacked electricity storage modules and a plurality of plate-shaped members disposed between the electricity storage modules. The multiple power storage modules and multiple plate-like members are disposed between a pair of insulating plates and restrained by restraining tools to form a laminate (battery stack) formed into a substantially rectangular parallelepiped shape.

[0003] The energy storage module has a resin frame, a plurality of battery cells, and a plurality of current collecting plates. The plate-shaped member has a conductive portion (conductive plate) that electrically connects adjacent energy storage modules, and an insulating portion (battery stack plate) arranged on the outer periphery. By positioning the insulating portion on the outer periphery of the energy storage device, the plate-shaped member can reduce the amount of exposure of the conductive portion from the outer periphery of the energy storage device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-198211 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the power storage device configured as described above may be electrically connected to a detection circuit to detect the voltage value, current value, etc., of the power storage device. For example, the detection circuit is connected to a terminal provided on a plate-shaped member to detect the voltage value and current value of the power storage device. In this way, it is necessary to provide a terminal on the plate-shaped member, and Patent Document 1 discloses that a terminal is provided on an insulating portion of the plate-shaped member. However, Patent Document 1 does not specifically disclose how the terminal is provided.

[0006] In view of this, a method of providing a terminal in an insulating portion of a plate-like member may be considered, for example, by providing an accommodating recess capable of accommodating the terminal in the insulating portion of the plate-like member, and accommodating the terminal in the accommodating recess. However, simply placing the terminal in the accommodating recess may cause the terminal to fall off the plate-like member.

[0007] In view of this, it is conceivable to prevent the terminals from falling off by providing the plate-shaped member with a locking structure that presses the terminals downward from above. However, since the plate-shaped member may be sandwiched between a plurality of stacked energy storage modules as described above, there is a limit to the length of the plate-shaped member in the plate thickness direction, and providing a locking structure is itself difficult.

[0008] As described above, it has been difficult to configure conventional electricity storage devices in a manner that prevents the terminals from falling off.

[0009] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a plate for a battery stack that suppresses the falling off of terminals. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the plate for a battery stack according to the present invention has the following features [1] to [4]. [1] A plate for a battery stack comprising: a plate-shaped terminal to which an electric wire is connected; and a plate-shaped housing having an accommodating recess for accommodating the terminal, The receiving recess is provided with a stop hole, The terminal is A connection portion electrically connected to a counterpart member; a retaining piece that is inserted into the retaining hole and engaged with the retaining hole, The retaining hole is provided with a wall portion located between the retaining piece and the connection portion. It is a plate for battery stacks. [2] In the plate for a battery stack according to the above [1], The terminal is A first portion at an end of which the connection portion is provided; a second portion connected to the first portion on the opposite side to the end portion and to which the electric wire is connected; The first portion and the second portion have an L-shaped cross section. It is a plate for battery stacks. [3] In the plate for a battery stack according to the above [2], The retaining piece is provided at the second location so as to protrude toward the connection portion in an extension direction of the first location. It is a plate for battery stacks. [4] The plate for a battery stack according to any one of the items [1] to [3] above, an insulating cover attached to the housing so as to cover the accommodating recess; The insulating cover is the connecting portion is configured to be movable between a provisionally locked state in which the connecting portion is covered with the accommodating recess and a fully locked state in which the accommodating recess is entirely covered with the connecting portion, In the provisionally-retained state, the terminal is configured to cover at least a portion of the terminal. It is a plate for battery stacks.

[0011] The battery stack plate having the configuration [1] above will be described below. The terminals are connected to electric wires and connected to a mating member at the connection parts. The terminals are accommodated in the accommodating recesses such that the retaining pieces provided on the terminals are inserted into and locked with the retaining holes provided in the accommodating recesses of the housing. As a result, the battery stack plate having this configuration can prevent the terminals from falling off without providing a member for preventing the terminals from falling off in the accommodating recesses.

[0012] Here, for example, when the prevention piece is inserted into the prevention hole, if the prevention piece is inserted in a state of contact with the prevention hole (particularly the inner surface of the hole), there is a risk of wear powder being generated due to sliding between the prevention piece and the prevention hole. If wear powder that may be generated when the prevention piece is inserted into the prevention hole in this way adheres to the connection part or gets between the connection part and the mating member, it may hinder electrical conduction between the connection part and the mating member. Therefore, the battery stack plate of this configuration is provided with a wall portion located between the prevention piece and the connection part in the prevention hole. As a result, the battery stack plate of this configuration is able to suppress adhesion of wear powder to the connection part and the intrusion of wear powder between the connection part and the mating member, and therefore has excellent reliability of electrical connection between the connection part and the mating member.

[0013] The battery stack plate having the above configuration [2] will be described below. The terminal has a first portion where a connection portion is provided at an end portion, and a second portion that is continuous with the first portion on the opposite side to the end portion where the connection portion is provided, and to which an electric wire is connected. The terminal has an L-shape due to the intersection of the first portion and the second portion. This allows the battery stack plate having this configuration to draw out an electric wire in a direction different from the direction in which the counter member is located.

[0014] The battery stack plate having the configuration [3] above will be described below. The retaining piece is provided at the second location so as to protrude toward the connection portion. This prevents the connection portion from floating up from the accommodating recess in the battery stack plate having this configuration, and therefore the reliability of the electrical connection between the connection portion and the mating member is superior to that in the case where the retaining piece is not provided at the second location so as to protrude toward the connection portion.

[0015] The battery stack plate having the configuration [4] above will be described below. The battery stack plate of this configuration further includes an insulating cover configured to be movable between a provisionally locked state in which the accommodating recess is covered so as to expose the connection portion, and a fully locked state in which the accommodating recess is covered in its entirety. The insulating cover is configured to cover at least a portion of the terminal in the provisionally locked state. In this way, in the battery stack plate of this configuration, the insulating cover presses the terminal in the provisionally locked state, so that the terminal is prevented from falling off. In other words, the retaining pieces and retaining holes prevent the terminal from falling off from the housing until the insulating cover is attached to the housing, and the retaining pieces and retaining holes, as well as the insulating cover, more appropriately prevent the terminal from falling off from the housing once the insulating cover is attached to the housing. Effect of the Invention

[0016] In this way, the present invention can provide a plate for a battery stack that prevents terminals from falling off.

[0017] The present invention has been briefly described above. The details of the present invention will become clearer by reading the detailed description of the invention described below with reference to the accompanying drawings. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is an exploded perspective view of a main portion of a battery stack according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of the battery stack plate shown in FIG. 1 with an insulating cover in a provisionally locked state. [Diagram 3] FIG. 3 is an exploded perspective view of a main part of the battery stack plate shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view showing a state in which the retaining piece of the connection terminal is inserted into the retaining hole of the housing and the connection terminal is accommodated in the housing. [Diagram 5] FIG. 5 is a top view of the embodiment shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view corresponding to FIG. [Figure 7] FIG. 7 is a top view of the embodiment shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] <Embodiment> DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a main portion of a battery stack 1 according to an embodiment of the present invention.

[0020] For the sake of convenience, the following definitions are made for the "front-rear direction", "up-down direction", "width direction", "front", "rear", "upper" and "lower" as shown in Figs. 1 to 7. The "front-rear direction", "width direction" and "up-down direction" are mutually perpendicular. The front-rear direction coincides with the extension direction of the housing 51 and the drawing direction of the electric wires 85. The up-down direction coincides with the plate thickness direction of the housing 51 and the connection terminal 80. The width direction coincides with the fitting direction between the side edges of the conductive plate 40 and the fitting grooves of the battery stack plates 50, 60, 70. The direction in which the battery stack plate 50 is brought close to the side edges of the conductive plate 40 is referred to as the "fitting direction". In other words, the fitting direction is also the insertion direction in which the retaining pieces 84 of the connection terminal 80 are inserted into the retaining holes 54 of the housing 51.

[0021] 1, a battery stack 1 according to this embodiment includes a plurality of stacked energy storage modules 10 (four in this example) and a plurality of plate-like members 20, 30 disposed between the plurality of energy storage modules 10. The battery stack 1 is disposed between a pair of insulating plates (not shown) and configured into a substantially rectangular parallelepiped shape by restraining members (not shown).

[0022] The power storage module 10 is configured, for example, in the shape of a rectangular plate having a plurality of battery cells, a plurality of current collector plates, and a resin frame. The battery cells are configured to have a positive electrode mixture layer formed of nickel hydroxide or the like, a negative electrode mixture layer formed of a hydrogen-absorbing alloy or the like, a separator formed of a porous film formed of a polyolefin resin, and an electrolyte.

[0023] The power storage module 10 can be formed of a single battery cell, and the battery cell configuration is not limited to the above-mentioned configuration and can adopt various known battery configurations.

[0024] As shown in FIG. 1, the plate-like member 20 of this embodiment is configured in a rectangular flat plate shape including a conductive plate 40, and a battery stack plate 50 and a battery stack plate 60 respectively fitted to both side edges of the conductive plate 40.

[0025] The plate-like member 30 of this embodiment is configured in a rectangular flat plate shape and includes a conductive plate 40, and a battery stack plate 50 and a battery stack plate 70 fitted respectively to both side edges of the conductive plate 40.

[0026] The conductive plate 40 is made of a metal such as aluminum alloy or copper and has a long and narrow rectangular shape, with both longitudinal edge portions formed into thin convex pieces (not shown). The both longitudinal edge portions of the conductive plate 40 are fitted into the fitting groove 56 of the battery stack plate 50 and the fitting grooves (not shown) of the battery stack plates 60 and 70, respectively.

[0027] The conductive plate 40 is a conductive part that electrically connects adjacent power storage modules 10 and also serves as a heat sink that cools the adjacent power storage modules 10.

[0028] Fig. 2 is a perspective view showing a provisionally locked state of the battery stack plate 50. Fig. 3 is an exploded perspective view of a main portion of the battery stack plate 50.

[0029] As shown in Figures 2 and 3, the battery stack plate 50 of this embodiment includes a housing 51 in the form of a rectangular plate that is elongated in the front-to-rear direction, a connection terminal 80 accommodated in the housing 51, an electric wire 85 connected to a front terminal of the connection terminal 80, and an insulating cover 52.

[0030] 3, the housing 51 according to the present embodiment is provided with an accommodating recess 53 recessed downward from an upper plate surface. The accommodating recess 53 has a terminal accommodating recess 53a in which the connection terminal 80 is accommodated, and an electric wire accommodating recess 53b in which the electric wire 85 is accommodated.

[0031] The terminal accommodating recess 53a has a shape corresponding to the outer circumferential shape of the connection terminal 80. The terminal accommodating recess 53a is provided with a retaining hole 54 into which a retaining piece 84 of the connection terminal 80 is inserted. Specifically, the retaining hole 54 is provided so as to be recessed from a wall portion on the tip side of the terminal accommodating recess 53a in the mating direction toward the tip side in the mating direction.

[0032] The terminal accommodating recess 53a has an inclined surface 55 that is inclined from the base end side in the mating direction toward the tip end side in the mating direction (i.e., along the insertion direction) so that the plate thickness of the housing 51 decreases. In other words, the inclined surface 55 is inclined downward from the base end side in the mating direction toward the tip end side in the mating direction. The inclined surface 55 is provided near the opening of the retaining hole 54 (see FIG. 4). Specifically, the inclined surface 55 is provided so as to be located inside the retaining hole 54.

[0033] The retaining hole 54 is provided with a wall portion 58 extending in the width direction between the retaining piece 84 and the connection portion 83. In other words, the wall portion 58 is one of the walls that define the retaining hole 54 (see FIG. 6). As shown in FIG. 6, the tip edge of the wall portion 58 in the fitting direction is located closer to the tip side in the fitting direction than the tip edge of the retaining piece 84 in the fitting direction. The end of the wall portion 58 on the base end side in the fitting direction defines the opening of the retaining hole 54 together with the housing 51.

[0034] The terminal accommodating recess 53a has a notch 57 formed by cutting out a portion corresponding to the connecting portion 83 of the connecting terminal 80 along the width direction. The notch 57 is located on the same side in the width direction as the fitting groove 56. In other words, the notch 57 is provided on the tip side in the fitting direction.

[0035] As shown in FIG. 3, the connection terminal 80 in this embodiment is configured in a generally L-shape having a first portion 81 extending along the width direction and a second portion 82 extending along the front-rear direction and continuous with the first portion 81.

[0036] The connection terminal 80 has a connection portion 83 electrically connected to the conductive plate 40 at the leading end side of the first part 81 in the mating direction. Since the cutout portion 57 is located below the connection portion 83 in the terminal accommodating recess 53a, when the connection terminal 80 is accommodated in the terminal accommodating recess 53a, the connection portion 83 is exposed downward.

[0037] When the side edge of the conductive plate 40 is fitted into the fitting groove 56 of the battery stack plate 50, the side edge of the conductive plate 40 enters the cutout portion 57. In other words, since the side edge of the conductive plate 40 enters below the connection portion 83, the connection portion 83 and the side edge of the conductive plate 40 come into contact with each other, and the conductive plate 40 and the battery stack plate 50 are electrically connected. In this embodiment, the conductive plate 40 corresponds to the counterpart member.

[0038] The connection terminal 80 has a retaining piece 84 at the second location 82. The retaining piece 84 is provided at a position corresponding to the retaining hole 54 and is provided so as to protrude from a side edge on the tip side in the mating direction of the second location 82 toward the tip side in the mating direction. In the battery stack plate 50, the retaining piece 84 is inserted into the retaining hole 54, thereby preventing the connection terminal 80 from falling off the housing 51.

[0039] An electric wire 85 is connected to a front end of the second point 82. In this embodiment, the electric wire 85 is housed in the electric wire housing recess 53b and is drawn out from the front of the housing 51 in the front-rear direction (see FIG. 1). The electric wire 85 has one end connected to the second point 82 and the other end opposite the other end connected to the second point 82, and is connected to, for example, a voltage detection circuit or the like. This allows the voltage value and the like of the battery stack 1 to be detected.

[0040] Fig. 4 is a cross-sectional view showing a state in which the retaining piece 84 of the connection terminal 80 is inserted into the retaining hole 54 of the housing 51 and the connection terminal 80 is accommodated in the housing 51. Fig. 5 is a view seen from above of the state shown in Fig. 4. Fig. 6 is a cross-sectional view corresponding to Fig. 5.

[0041] When the connection terminal 80 is accommodated in the terminal accommodating recess 53a, the retaining piece 84 is inserted into the retaining hole 54 from the base end side in the mating direction toward the tip end side in the mating direction (from the right side of the paper to the left side of the paper in the width direction of FIG. 4). For example, the retaining piece 84 is inserted into the retaining hole 54 in a state in which the connection terminal 80 is inclined so that the retaining piece 84 is positioned lower than the side edge of the second portion 82 on the base end side in the mating direction.

[0042] When the retaining piece 84 is completely inserted into the retaining hole 54 and the connection terminal 80 is accommodated in the terminal accommodating recess 53a, the retaining piece 84 and the retaining hole 54 are engaged with each other, as shown in Figures 4 and 5. Specifically, as shown in Figure 4 in particular, the upper plate surface 84a of the connection terminal 80 and the hole inner surface 54a of the upper wall portion of the retaining hole 54 are adjacent to each other in the vertical direction. This restricts the upward displacement of the connection terminal 80. In other words, the connection terminal 80 is prevented from falling off the housing 51.

[0043] When the retaining piece 84 is inserted into the retaining hole 54, the retaining piece 84 may be inserted in a state where it is in contact with the retaining hole 54 (particularly the hole inner surface 54a). At this time, there is a risk of wear powder being generated due to sliding between the retaining piece and the retaining hole. For example, if wear powder is generated, and the wear powder adheres to the connection portion 83 or gets between the connection portion 83 and the side edge portion of the conductive plate 40, it may hinder conduction between the connection terminal 80 and the conductive plate 40.

[0044] Therefore, in the battery stack plate 50 of this embodiment, a wall portion 58 is provided so as to be located between the retaining piece 84 and the connection portion 83. This prevents wear powder from adhering to the connection portion 83 and from entering between the connection portion 83 and the conductive plate 40.

[0045] FIG. 7 is a top view of the battery stack plate 50 with the insulating cover 52 in the provisionally locked state.

[0046] When the connection terminals 80 and the electric wires 85 are accommodated in the accommodating recesses 53, the insulating cover 52 is attached to the housing 51. The insulating cover 52 is configured to be movable between a provisionally locked state (see FIGS. 2 and 7) in which the insulating cover 52 covers the accommodating recesses 53 so as to expose the connection portions 83, and a fully locked state in which the insulating cover 52 covers the entire accommodating recesses 53.

[0047] 2 and 7, when the connection terminals 80 and the electric wires 85 are accommodated in the accommodating recesses 53, the insulating cover 52 is attached to the housing 51 in a provisionally-engaged state. In the provisionally-engaged state of the insulating cover 52, at least a part of the first portion 81 and the second portion 82, excluding the connection portion 83, is covered. That is, the insulating cover 52 presses down the above-mentioned portions of the connection terminals 80 in the provisionally-engaged state. This further restricts the upward displacement of the connection terminals 80. That is, the connection terminals 80 are more appropriately prevented from falling off the housing 51.

[0048] <Actions and Effects> According to the battery stack plate 50 of this embodiment, the retaining piece 84 of the connection terminal 80 is inserted into the retaining hole 54 provided in the terminal accommodating recess 53a of the housing 51, thereby engaging the retaining piece 84 with the retaining hole 54. As a result, the connection terminal 80 accommodated in the terminal accommodating recess 53a is prevented from falling off from the housing 51.

[0049] Furthermore, according to the battery stack plate 50 of this embodiment, the prevention hole 54 is provided with the wall portion 58 located between the prevention piece 84 and the connection portion 83, which prevents wear powder that may be generated when the prevention piece 84 is inserted into the prevention hole 54 from adhering to the connection portion 83 and from entering between the connection portion 83 and the conductive plate 40. As a result, the battery stack plate 50 of this embodiment has excellent reliability of electrical connection between the connection portion 83 and the conductive plate 40.

[0050] Furthermore, according to the battery stack plate 50 of this embodiment, the terminal accommodating recess 53a has an inclined surface 55 near the opening of the retaining hole 54 (inside the hole in this example), so that when the connection terminal 80 is accommodated in the terminal accommodating recess 53a, the retaining piece 84 can be easily inserted into the retaining hole 54 by inserting the retaining piece 84 into the retaining hole 54 while aiming the inclined surface 55. For example, when the insertion angle of the retaining piece 84 with respect to the retaining hole 54 is equal to or larger than the inclination angle of the inclined surface 55 (and is equal to or smaller than 90 degrees), the retaining piece 84 is guided by the inclined surface 55 and inserted into the retaining hole 54.

[0051] If the terminal accommodating recess 53a did not have the inclined surface 55 near the opening of the retaining hole 54, there was a risk that the plate surface of the terminal accommodating recess 53a and the retaining piece 84 would interfere with each other when the retaining piece 84 was inserted into the retaining hole 54, and the retaining piece 84 would not be easily inserted into the retaining hole 54. However, in the configuration of this embodiment, the terminal accommodating recess 53a has an inclined surface, so that the retaining piece 84 can be easily inserted into the retaining hole 54, as described above.

[0052] Furthermore, according to the battery stack plate 50 of this embodiment, the connection terminal 80 has an L-shape due to the intersection of the first location 81 and the second location 82, so that the electric wire 85 can be drawn out in a direction different from the direction in which the conductive plate 40 is located.

[0053] Furthermore, according to the battery stack plate 50 of this embodiment, the retaining piece 84 is provided at the second location 82 so as to protrude toward the tip end in the mating direction, which prevents the connection portion 83 from floating up from the terminal accommodating recess 53a. This provides more reliable electrical connection between the connection portion 83 and the conductive plate 40 than when the retaining piece 84 is not provided at the second location 82 so as to protrude toward the tip end in the mating direction.

[0054] In addition, since the anti-pullout piece 84 is positioned so as to be aligned in the fore-and-aft direction with the first location 81 including the connection portion 83, by providing a wall portion 58 between the anti-pullout piece 84 and the connection portion 83 in the fore-and-aft direction, it is possible to easily prevent wear powder from adhering to the connection portion 83 and from entering between the connection portion 83 and the conductive plate 40.

[0055] Furthermore, the battery stack plate 50 of this embodiment is movable between a temporary engagement state and a full engagement state, and includes the insulating cover 52 that covers at least a portion of the connection terminal 80 in the temporary engagement state, so that in the temporary engagement state the insulating cover 52 presses the connection terminal 80. As a result, the retaining pieces 84 and the retaining holes 54 prevent the connection terminal 80 from falling off the housing 51 until the insulating cover 52 is attached to the housing 51, and once the insulating cover 52 is attached to the housing 51, the retaining pieces 84, the retaining holes 54, and the insulating cover 52 more appropriately prevent the connection terminal 80 from falling off the housing 51.

[0056] Furthermore, according to the battery stack plate 50 of this embodiment, by providing the housing 51 with the anti-pullout hole 54 and the connection terminal 80 with the anti-pullout piece 84, there is no need to provide the housing 51 with a locking structure or the like for preventing the connection terminal 80 from falling off, so that the battery stack plate 50 can be made low-profile, and thus the battery stack 1 can be made smaller.

[0057] <Other forms> The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0058] Here, the features of the embodiments of the plate for a battery stack according to the present invention described above will be briefly summarized and listed in the following [1] to [4]. [1] A plate (50) for a battery stack, comprising: a plate-shaped terminal (connection terminal 80) to which an electric wire (85) is connected; and a plate-shaped housing (51) having an accommodating recess (53) for accommodating the terminal, The receiving recess (53) is provided with a retaining hole (54), The terminal (connection terminal 80) is A connection portion (83) electrically connected to a counterpart member (conductive plate 40); a retaining piece (84) that is inserted into the retaining hole (54) and engaged with the retaining hole, The retaining hole (54) is provided with a wall portion (58) located between the retaining piece (84) and the connection portion (83). A plate for a battery stack (50). [2] In the plate for a battery stack (50) according to the above [1], The terminal (connection terminal 80) is A first portion (81) at an end of which the connection portion is provided; a second portion (82) connected to the first portion (81) on the opposite side to the end portion and to which the electric wire (85) is connected; The first portion (81) and the second portion (82) intersect to form an L-shape. A plate for a battery stack (50). [3] In the plate for a battery stack (50) described in [2] above, The retaining piece (84) is provided at the second location (82) so as to protrude toward the connection portion (83) in the extending direction of the first location. A plate for a battery stack (50). [4] In the plate for a battery stack (50) according to any one of the items [1] to [3], The housing further includes an insulating cover that is attached to the housing so as to cover the receiving recess. The insulating cover (52) is the connecting portion (83) is configured to be movable between a provisionally locked state in which the connecting portion (83) covers the accommodating recess (53) so as to expose the connecting portion (83) and a fully locked state in which the connecting portion (83) covers the entire accommodating recess (53), In the provisionally locked state, the terminal (connection terminal 80) is configured to cover at least a portion of the terminal. A plate for a battery stack (50). [Explanation of symbols]

[0059] 1 Battery stack 10 Energy storage module 20,30 Plate-shaped member 40 Conductive Plate 50 Battery stack plate 51 Housing 52 Insulating cover 53 Storage recess 53a Terminal receiving recess 53b Wire receiving recess 54 Locking hole 54a Hole inner surface 55 Slope 56 Fitting groove 57 Notch 58 Wall 60,70 Battery stack plate 80 Connection terminal 81 First Place 82 Second Place 83 Connection 84 Retaining piece 84a Upper plate surface 85 Electric wire

Claims

1. A plate for a battery stack comprising: a plate-shaped terminal to which an electric wire is connected; and a plate-shaped housing having an accommodating recess for accommodating the terminal, The receiving recess is provided with a stop hole, The terminal is A connection portion electrically connected to a counterpart member; a retaining piece that is inserted into the retaining hole and engaged with the retaining hole, The retaining hole is provided with a wall portion located between the retaining piece and the connection portion. Plate for battery stack.

2. The plate for a battery stack according to claim 1 , The terminal is A first portion at an end of which the connection portion is provided; a second portion connected to the first portion on the opposite side to the end portion and to which the electric wire is connected; The first portion and the second portion have an L-shaped cross section. Plate for battery stack.

3. The plate for a battery stack according to claim 2, The retaining piece is provided at the second location so as to protrude toward the connection portion in an extension direction of the first location. Plate for battery stack.

4. The plate for a battery stack according to any one of claims 1 to 3, an insulating cover attached to the housing so as to cover the accommodating recess; The insulating cover is the connecting portion is configured to be movable between a provisionally locked state in which the connecting portion is covered with the accommodating recess and a fully locked state in which the accommodating recess is entirely covered with the connecting portion, In the provisionally-retained state, the terminal is configured to cover at least a portion of the terminal. Plate for battery stack.

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