JP6571513B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including a terminal block used for connection to an external device, another power storage device, or the like.

  Conventionally, a battery system including a large number of battery cells is known (see Patent Document 1). Specifically, this battery system includes a battery block in which a plurality of battery cells having electrode terminals are stacked, and a pair of battery cells that are stacked on the opposite surface of the battery block and sandwiched in the stacking direction. An end plate, and a connector for connecting the pair of end plates.

  In this battery system, the output line is connected to the electrode terminal of the battery cell via the relay bus bar. Specifically, a set screw is screwed into a nut fixed to the end plate in a non-rotating state, and the relay bus bar and the connection terminal of the output line are connected by the set screw and the nut.

  In such a battery system, it is conceivable to attach a terminal block to an end plate or the like in order to increase the degree of design freedom with respect to the arrangement of connection parts (set screws and nuts) with connection terminals of the output line. As shown in FIG. 22, this terminal block includes external terminals to which the output line 800 and the like can be connected (corresponding to the nut 801 and set screw 802 in the battery system described above), the battery cell electrode terminals 803, and the external terminals. A relay bus bar 804 that connects the external terminals and the relay bus bar 804 in an insulated state with respect to the end plate 805 and the like. By setting the length, shape, etc. of the relay bus bar 804, the battery system in which the position of the connection portion with the connection terminal 800A of the output line 800 is set to a desired position without changing the design of the end plate 805, the coupling tool, etc. Is obtained.

  However, in a battery system including such a terminal block, for example, when mounted on a vehicle with a lot of vibration, the vibration of the vehicle or the like is transmitted to the terminal block via the end plate 805 or the like, and the relay bus bar 804 or the like vibrates. There is a case. When the relay bus bar 804 vibrates in this way, the vibration is transmitted to the electrode terminal 803 of the battery cell connected to the relay bus bar 804 and the peripheral members of the relay bus bar 804 (the battery cell to which the relay bus bar 804 is connected). The influence may be exerted on the electrode terminals 803).

JP 2010-80353 A

  Therefore, an object of the present invention is to provide a power storage device that can suppress displacement of a conductive member electrically connected to an output terminal in a terminal block attached to a termination member.

The power storage device according to the present invention includes:
A power storage element having a first external terminal;
A termination member adjacent to the electricity storage element;
A second external terminal, a conductive member that electrically connects the second external terminal and the first external terminal, a base portion that holds the conductive member, the conductive member, the base portion, and the termination member. A metal rivet to be fastened in a penetrating state, and a terminal block having an insulating member disposed between the rivet and an inner peripheral surface of a hole through which the rivet penetrates in the conductive member,
The base is
A support portion fixed to the termination member and supporting the conductive member on a side where the termination member is located with respect to the conductive member;
A pressing portion that sandwiches at least a part of the conductive member between the supporting portion and the supporting portion.

  According to such a configuration, in the base portion, at least part of the conductive member is supported between the supporting portion by the pressing portion while the conductive member is supported by the supporting portion (the terminating member side) fixed to the terminating member. Since they are sandwiched, the displacement of the conductive member (specifically, the displacement in the direction away from the terminal member) is effectively suppressed.

  Furthermore, according to this configuration, the conductive member is firmly fastened to the terminal member by the hard metal rivet while maintaining the insulation between the rivet and the conductive member by the insulating member. Can be more reliably suppressed.

In the power storage device,
The conductive member includes a first part that extends in a predetermined direction and is fixed to the terminal member via the support part, and a second part that extends from the first part in a direction intersecting the predetermined direction. Have
The pressing part sandwiches at least a part of the first part between the support part,
The second external terminal may have a screw portion protruding from the second part.

  According to such a configuration, the first part that is continuous with the second part due to the torque generated in the second part when a nut or the like is tightened on the screw portion in order to connect an external connection terminal or the like to the second external terminal. A part of the first part tends to be separated from the support part by tilting or the like, but since the first part is sandwiched between the support part by the pressing part, the separation of the first part due to the torque Can be prevented.

in this case,
The second portion of the conductive member has a non-circular outline in a direction view in which the screw portion protrudes,
It is preferable that the base portion has a contact surface that extends in a direction intersecting with a torque having the screw portion as a rotation axis and is in surface contact with at least a part of an end surface constituting the contour of the conductive member.

  According to such a configuration, when a nut or the like is tightened on the screw portion in order to connect an external connection terminal or the like to the second external terminal, torque is generated with the screw portion as the rotation axis in the second portion (conductive member). However, the contact surface spreading in the direction intersecting with the torque comes into surface contact with the peripheral end surface of the second portion and receives the torque, thereby preventing the rotation due to the torque of the second portion (conductive member). it can.

In the power storage device,
The terminal block may include a metal cylindrical member that surrounds the rivet between the insulating member and the rivet.

  According to such a configuration, since the metal cylindrical member is disposed so as to surround the portion that penetrates the conductive member, the base portion, and the termination member in the rivet, the insulating member disposed on the outside thereof It is possible to prevent the stress from the rivet from being transmitted to the rivet, thereby preventing the insulating member from being deformed by the stress.

In the power storage device,
The base part and the insulating member may be integrated.

  According to this configuration, the formation of a gap between the inner peripheral surface of the hole in the conductive member (the hole through which the rivet is inserted) and the insulating member is suppressed, whereby the gap between the rivet and the conductive member is suppressed. Insulation is effectively maintained.

In the power storage device,
The rivet has a shaft portion that penetrates the conductive member, the base portion, and the terminal member, and a surface direction perpendicular to the penetration direction at a position spaced in the penetration direction of the shaft portion in the shaft portion. Each having a pair of large-diameter portions that widen and sandwich the conductive member, the base portion, and the terminal member therebetween,
The insulating member is
The first cylindrical portion surrounding the periphery of the shaft portion, the one large diameter portion of the rivet and the conductive member, the base portion, or the terminal member adjacent to the one large diameter portion. A first member having a first flange extending from an end of the one cylinder portion,
A second cylindrical portion surrounding the first cylindrical portion between the first cylindrical portion and the inner peripheral surface of the hole through which the rivet passes; the other large diameter portion of the rivet; and the other large diameter portion And a second member having a second flange extending from the end of the second tube portion between the conductive member, the base portion, and the terminal member adjacent to each other.

  According to this configuration, the insulating member (the first insulating member or the second insulating member) is interposed between the large-diameter portion and a member (conductive member, base portion, or terminal member) adjacent to the large-diameter portion. Since the collar portion is disposed, a creeping distance between the rivet and the conductive member and between the rivet and the termination member can be sufficiently secured.

Further, the power storage device according to the present invention includes:
A power storage element having a first external terminal;
A termination member adjacent to the electricity storage element;
A terminal block having a second external terminal, a conductive member that electrically connects the second external terminal and the first external terminal, and a base portion that holds the conductive member;
The base is
A support portion fixed to the termination member and supporting the conductive member on a side where the termination member is located with respect to the conductive member;
A holding part that sandwiches at least a part of the conductive member between the support part, and
The second external terminal has a screw portion protruding from the conductive member,
The conductive member is a plate-like member that spreads in a plane direction orthogonal to the screw portion, and has a non-circular outline in a direction view in which the screw portion protrudes,
The base portion has an abutting surface that extends in a direction intersecting with a torque having the screw portion as a rotation axis and is in surface contact with at least a part of an end surface constituting the contour of the conductive member;
The contact surface is in surface contact with the peripheral end surface of the plate-like conductive member over the entire periphery and is configured integrally with the pressing portion.

  According to such a configuration, even when a torque with the screw portion as a rotation axis is generated in the conductive member when a nut or the like is tightened on the screw portion in order to connect an external connection terminal or the like to the second external terminal, the torque and An abutting surface having a portion extending in the intersecting direction abuts the conductive member having a non-circular contour over the entire circumference (surface contact with the peripheral end surface of the conductive member), and receives the torque, whereby the conductive member The rotation caused by the torque can be prevented.

  In addition, since the pressing portion and the contact surface are integrated, the end surface of the plate-like conductive member (that is, the peripheral end surface having a small dimension in the thickness direction) and the contact surface of the base portion are all of the peripheral end surface. The pressing portion securely sandwiches the conductive member with the support portion while making surface contact over the circumference. Thereby, the rotation of the conductive member due to the torque generated when connecting the external connection terminal or the like to the second external terminal is more reliably prevented.

In the power storage device,
The terminal block is
Fastening and penetrating the conductive member, the base portion and the terminal member, and a metal rivet,
An insulating member disposed between the rivet and an inner peripheral surface of a hole through which the rivet passes in the conductive member.

  According to this configuration, while maintaining the insulation between the rivet and the conductive member by the insulating member, the conductive member and the base portion are firmly fastened to the terminal member by the hard metal rivet, thereby vibrating the conductive member. Can be suppressed more reliably.

In the power storage device,
The terminal block may be an insert molded product in which the conductive member and the base portion are integrated.

  According to such a configuration, since the pressing portion can be reliably brought into contact with the conductive member, the displacement of the conductive member can be more reliably suppressed.

  As mentioned above, according to this invention, the electrical storage apparatus which can suppress the displacement of the electrically-conductive member electrically connected with an output terminal in the terminal block attached to a termination | terminus member can be provided.

FIG. 1 is a perspective view of the power storage device according to the first embodiment. FIG. 2 is an exploded perspective view of the power storage device. FIG. 3 is a perspective view of a power storage element used in the power storage device. FIG. 4 is an exploded perspective view of the power storage element. FIG. 5 is a perspective view of a terminal block and a termination member in the power storage device. FIG. 6 is a perspective view of the terminal block and the terminal member with the terminal cover open. FIG. 7 is a perspective view of the terminal block and the terminal member. FIG. 8 is a perspective view of the termination member. FIG. 9 is a plan view of the terminal block and the termination member with the terminal cover removed. 10 is a cross-sectional view taken along the line XX in FIG. FIG. 11 is a cross-sectional view of the terminal block and its peripheral portion at the position of the line XI-XI in FIG. FIG. 12 is a perspective view of the power storage device according to the second embodiment. FIG. 13 is an exploded perspective view of the power storage device. FIG. 14 is a perspective view of a terminal block and a termination member in the power storage device. FIG. 15 is a perspective view of the terminal block and the terminal member. FIG. 16 is a plan view of the terminal block and the termination member. 17 is a cross-sectional view taken along line XVII-XVII in FIG. FIG. 18 is a cross-sectional view of a connection portion between a terminal member and a terminal block according to another embodiment. FIG. 19 is a cross-sectional view of a connection portion between a terminal member and a terminal block according to another embodiment. FIG. 20 is a cross-sectional view of a connection portion between a terminal member and a terminal block according to another embodiment. FIG. 21 is a cross-sectional view of a connection portion between a terminal member and a terminal block according to another embodiment. FIG. 22 is a perspective view of a peripheral part of a terminal block of a conventional battery system.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In addition, the name of each component (each component) of this embodiment is a thing in this embodiment, and may differ from the name of each component (each component) in background art.

  As shown in FIGS. 1 and 2, the power storage device includes a power storage element 10 having an external terminal (first external terminal) 13, a termination member 30 adjacent to the power storage element 10, and a bus bar connected to the external terminal 13. 5 and a terminal block (terminal portion) 6 attached to the termination member 30 and having an external terminal (second external terminal) 61. In addition, power storage device 1 includes spacers 2 </ b> A and 2 </ b> B adjacent to power storage element 10. In the power storage device 1 of the present embodiment, the termination member 30 is included in the holding member 3 that holds the power storage element 10 and the spacers 2A and 2B together. That is, the power storage device 1 includes the holding member 3 that includes the termination member 30 and holds the power storage element 10. The holding member 3 is made of a conductive member such as metal. Accordingly, the power storage device 1 includes an insulator 4 disposed between the power storage element 10 and the holding member 3.

  Hereinafter, the external terminal of the power storage element 10 is referred to as “cell terminal 13”, and the external terminal provided on the terminal block 6 of the power storage device 1 is referred to as “module terminal 61”.

  As shown in FIGS. 3 and 4, the power storage element 10 includes an electrode body 11 including a positive electrode and a negative electrode, a case 12 that houses the electrode body 11, and a pair of cell terminals 13 disposed on the outer surface of the case 12. And comprising. The power storage element 10 also includes an insulating member 15 and the like disposed between the electrode body 11 and the case 12.

  The case 12 includes a case main body 120 having an opening and a lid plate 121 that closes the opening of the case main body 120.

  The case main body 120 includes a plate-like closing part 123 and a cylindrical body part 124 connected to the periphery of the closing part 123.

  The body portion 124 includes a pair of first walls 125 that face each other with a space therebetween, and a pair of second walls 126 that face each other across the pair of first walls 125. Each of the first wall 125 and the second wall 126 has a rectangular shape. The first wall 125 and the second wall 126 are adjacent to each other with their end edges abutted against each other. The edges of the adjacent first wall 125 and second wall 126 are connected over the entire length. Thereby, the trunk | drum 124 becomes a rectangular tube shape. One end of the body portion 124 is closed by the closing portion 123, and the other end of the body portion 124 is opened. That is, the case main body 120 has a bottomed rectangular tube shape. The trunk portion 124 of the present embodiment is formed in a flat rectangular tube shape.

  The lid plate 121 is a plate-like member that closes the opening of the case main body 120. Specifically, the cover plate 121 has a contour shape corresponding to the peripheral edge of the opening of the case body 120 when viewed in the normal direction. That is, the cover plate 121 is a rectangular plate material that is long in one direction (a direction in which the pair of second walls 126 face each other) when viewed in the normal direction.

  In the case 12 of this embodiment, the periphery of the cover plate 121 is overlapped with the opening periphery of the case body 120 to close the opening of the case body 120. In this state, the cover plate 121 and the case body 120 The boundary is welded.

  As described above, the power storage device 1 of the present embodiment includes the plurality of power storage elements 10 aligned in one direction. Each of the plurality of power storage elements 10 is aligned with the first wall 125 of the case 12 oriented in one direction.

  In the following description, the direction (first direction) in which the power storage elements 10 are aligned is defined as the X-axis direction in orthogonal coordinates. Further, the direction (second direction) in which the second wall 126 of the power storage element 10 faces is the Y-axis direction in the orthogonal coordinates, and the direction (third direction) in which the cover plate 121 and the closing portion 123 face each other is Z in the orthogonal coordinates. Axial direction. Accordingly, in each drawing, orthogonal coordinate axes corresponding to the X-axis direction, the Y-axis direction, and the Z-axis direction are supplementarily illustrated.

  The power storage device 1 of this embodiment includes two types of spacers 2A and 2B. Specifically, the power storage device 1 includes an inner spacer 2A disposed between two adjacent power storage elements 10, an outer spacer 2B adjacent to the power storage element 10 at the end of the plurality of power storage elements 10, Is provided.

  As shown in FIG. 2, the inner spacer 2A includes a base 20A adjacent to the power storage element 10 (specifically, the first wall 125 of the case body 120) and the base 20A of the two power storage elements 10 adjacent to the base 20A. And a restricting portion 21 </ b> A that prevents positional deviation with respect to the position.

  The base 20A of the inner spacer 2A extends in the direction orthogonal to the X-axis direction (YZ plane (plane including the Y-axis and Z-axis)) between the power storage elements 10 and is adjacent on both sides in the X-axis direction. A flow path through which a fluid (for example, a fluid for adjusting the temperature of the power storage element 10) can flow is formed between at least one of the power storage elements 10. The base 20A has a substantially rectangular outline when viewed in the X-axis direction. This outline is substantially the same size as the first wall 125 of the electricity storage element 10 when viewed in the X-axis direction.

  The restricting portion 21A extends from the base 20A toward both sides in the X-axis direction along an end portion in the Y-axis direction of the power storage element 10 adjacent to the base 20A. Specifically, the restricting portion 21A is formed at each corner of the base 20A. That is, the inner spacer 2A has a plurality (four in the example of the present embodiment) of restricting portions 21A. As described above, these restricting portions 21A prevent the displacement of the two energy storage elements 10 adjacent to the base 20A in the YZ plane direction with respect to the base 20A. Accordingly, the restricting portion 21A restricts relative movement in the YZ plane direction of the two energy storage elements 10 adjacent to the inner spacer 2A.

  The outer spacer 2B is disposed adjacent to the inner spacer 2A via the power storage element 10. The power storage device 1 of the present embodiment includes a pair of external spacers 2B. Each of the pair of external spacers 2 </ b> B is adjacent to the power storage element 10 at the end of the plurality of power storage elements 10. That is, a pair of external spacers 2B are provided so as to sandwich a plurality of power storage elements 10 aligned in the X-axis direction.

  Specifically, the outer spacer 2B includes a base 20B that spreads in the YZ plane direction, and a restricting portion 21B that restricts the displacement of the power storage element 10 adjacent to the base 20B. The base 20 </ b> B of the outer spacer 2 </ b> B of the present embodiment faces (adjacent) the terminal member 30 included in the holding member 3. That is, the external spacer 2 </ b> B is disposed between the power storage element 10 and the termination member 30.

  The base 20B of the external spacer 2B includes a plate-like base body 201B extending in the YZ plane direction, and an external contact portion 202B that protrudes from one surface of the base body 201B toward the termination member 30 and contacts the termination member 30. And an internal contact portion 203B (see FIG. 1) that protrudes from the other surface of the base 20B toward the power storage element 10 and contacts the power storage element 10.

  The base 20 </ b> B forms a flow path for allowing the fluid to pass between the base 20 </ b> B and the adjacent storage element 10 by the internal contact portion 203 </ b> B. Further, the base 20B forms a gap between the base main body 201B and the termination member 30 by the external contact portion 202B.

  The restricting portion 21B extends toward the power storage element 10 adjacent to the base 20B. The restricting portion 21B is formed at each corner of the base 20B (specifically, the base body 201B). As described above, the restricting portion 21B prevents the displacement of the energy storage element 10 adjacent to the base 20B in the YZ plane direction with respect to the base 20B. That is, the restricting portion 21B restricts relative movement in the YZ plane direction between the outer spacer 2B and the power storage element 10 adjacent to the outer spacer 2B.

  As shown in FIGS. 1 and 2, the holding member 3 includes a pair of termination members 30 disposed at positions adjacent to the external spacers 2 </ b> B, and a frame 31 that connects each of the pair of termination members 30. .

  Each of the pair of termination members 30 extends in the YZ plane direction as shown in FIGS. Each of the pair of termination members 30 protrudes from the main body 300 having a contour (rectangular contour in the present embodiment) corresponding to the power storage element 10 toward the base 20B of the external spacer 2B and from the base 20B. It has a pressure contact portion 301 that contacts the extended external contact portion 202 </ b> B, a support piece 302 to which the terminal block 6 is attached, and a stay 303 that supports the terminal block 6. As described above, the termination member 30 of the present embodiment is made of metal.

  The support piece 302 extends in the X-axis direction and the Y-axis direction and is long in the Y-axis direction from the side corresponding to the cover plate 121 of the power storage element 10 among the four sides (end edges) constituting the outline of the main body 300. It is a plate-shaped part.

  The stay 303 is an L-shaped plate-like member extending from the vicinity of the side (edge) where the support piece 302 of the main body 300 extends. A hole 305 defined by a rectangular inner peripheral surface 304 as viewed from the Z-axis direction is provided at the tip of the stay 303 (a portion closer to the tip than the bent position). That is, the stay 303 has an inner peripheral surface 304 that defines a hole 305 penetrating in the Z-axis direction at the tip.

  As shown in FIGS. 1 and 2, the frame 31 extends in the X-axis direction and connects the pair of termination members 30 to each other. In the holding member 3 of the present embodiment, the frame 31 connects both ends of the pair of termination members 30 (main body 300) in the Y-axis direction. That is, the holding member 3 has a pair of frames 31.

  Specifically, the frame 31 corresponds to the first connection portion 310 extending in the X-axis direction at a position corresponding to the cover plate 121 of the power storage element 10 in the Z-axis direction, and the closing portion 123 of the power storage element 10 in the Z-axis direction. And a second connection portion 311 extending in the X-axis direction at the position. Further, the frame 31 has a pair of support portions 312 that extend in the Z-axis direction and connect the end portions in the X-axis direction of the first connection portion 310 and the second connection portion 311. The frame 31 includes a reinforcing portion 313 that extends in the Z-axis direction and connects intermediate portions of the first connecting portion 310 and the second connecting portion 311 in the X-axis direction. Thus, the frame 31 is formed in a frame shape by connecting the end portions of the first connection portion 310 and the second connection portion 311 to each other by the pair of support portions 312.

  The insulator 4 is made of an insulating material. The insulator 4 is disposed between the conductive frame 31 and the plurality of power storage elements 10. Specifically, the insulator 4 extends in the X-axis direction, extends in the X-axis direction, and extends in the X-axis direction, and extends in the X-axis direction, and is connected to the second connection. And a second insulating part 41 disposed between the part 311 and the plurality of power storage elements 10. Further, the insulator 4 has a pair of third insulating portions 42 that extend in the Z-axis direction and are disposed between the support portion 312 and the power storage element 10. Furthermore, the insulator 4 includes a fourth insulating portion 43 that extends in the Z-axis direction and is disposed between the reinforcing portion 313 and the power storage element 10. Each of the pair of third insulating portions 42 connects the end portions in the X-axis direction of the first insulating portion 40 and the second insulating portion 41. Further, the fourth insulating portion 43 connects the first insulating portion 40 and the second insulating portion 41 at a position corresponding to the reinforcing portion 313 in the X-axis direction.

  The bus bar 5 is a thin plate member made of a conductive member such as metal. The bus bar 5 of the present embodiment includes an intermediate bus bar 51 that connects the cell terminals 13 of the power storage element 10, and an end bus bar 52 that connects the cell terminal 13 of the power storage element 10 and the terminal block 6.

  5 to 11, the terminal block 6 includes a module terminal 61 connected to an external device, another power storage device, and the like, and a conductive member 62 that electrically connects the module terminal 61 and the cell terminal 13. And a base portion 63 that holds the conductive member 62 and has an insulating property. The terminal block 6 also includes a terminal cover 64 that covers the module terminal 61 in order to prevent the module terminal 61 from coming into contact with a person or other member when the power storage device 1 is not used. The terminal block 6 of this embodiment is formed by insert molding. For this reason, in the terminal block 6, the conductive member 62 and the base portion 63 are integrated.

  The conductive member 62 is a plate-like member having conductivity. The conductive member 62 of this embodiment is an L-shaped plate-like member as viewed from the Y-axis direction, that is, a plate-like member bent at an intermediate position. Specifically, the conductive member 62 includes a first part 621 that extends in a predetermined direction (X-axis direction in the example of the present embodiment) and is fixed to the terminal member 30 via the base 63, and a first part 621. A second portion 622 extending in a direction intersecting with the predetermined direction (in the example of the present embodiment, the Z-axis direction).

  The first portion 621 is a plate-like portion that extends in the XY plane (a plane that includes the X axis and the Y axis). The first part 621 of the present embodiment is a plate-like part that is long in the Y-axis direction (see FIG. 9). In the first part 621, a part of the first part 621 is covered with the base part 63, and the end bus bar 52 is connected (welded in the example of the present embodiment) to a part that is not covered with the base part 63. (See FIG. 1).

  The second part 622 is a plate-like part that extends from the edge of the first part 621 in the X-axis direction and extends in the YZ plane direction. The second portion 622 has a non-circular contour when viewed in the X-axis direction. This contour is constituted by the peripheral end face (end face) of the second portion 622. Specifically, the second portion 622 includes a rectangular portion 6221 from which the module terminal 61 protrudes and a tip of the rectangular portion 6221 (tip in the Z-axis direction), and extends from the rectangular portion 6221 in the Y-axis direction. And a small-sized insertion piece 6222 (see FIG. 10). The module terminal 61 protrudes from the center of the rectangular portion 6221.

  The module terminal 61 includes a screw portion 611 that protrudes from the conductive member 62 (second portion 622 in the example of the present embodiment). Specifically, the module terminal 61 includes a screw portion 611 extending in the X-axis direction and a head portion 612 that extends in the YZ plane direction at one end of the screw portion 611. The module terminal 61 is made of a conductive member such as metal.

  The base portion 63 is fixed to the end member 30 and between the support portion 630 and the support member 630 that supports the conductive member 62 on the side where the end member 30 is located with respect to the conductive member 62. A pressing portion 635 that sandwiches at least a part of the holding portion. The base part 63 of the present embodiment is made of resin in which a support part 630 and a pressing part 635 are integrally formed.

  The support part 630 includes a first support part 631 that supports the first part 621 of the conductive member 62 and a second support part 632 that supports the second part 622 of the conductive member 62.

  The first support portion 631 has a recess 633 into which the first portion 621 of the conductive member 62 is fitted. The recess 633 is provided with a support surface 6331 that supports the first part 621 so as to come into surface contact with the first part 621 from the end member 30 side in the Z-axis direction, and a first part that is erected from the periphery of the support surface 6331. And a contact surface 6332 that is in surface contact with at least a part of the peripheral end surface (end surface) 6210 of 621. The contact surface 6332 of this embodiment is in surface contact with the peripheral end surface 6210 of the first part 621 in the entire periphery of the first part 621 excluding the connection part with the second part 622.

  The second support portion 632 extends in the Z-axis direction along the stay 303 of the terminal member 30 from the end portion in the X-axis direction of the first support portion 631. The second support portion 632 supports the second portion 622 from the end member 30 side in the X-axis direction. Further, the second support portion 632 spreads in a direction intersecting with the torque having the screw portion 611 as the rotation axis, and forms a contour of the second portion 622 of the conductive member 62 and at least a part and a surface of the peripheral end surface (end surface) 6220. It has a contact surface 6320 that comes into contact. The second support portion 632 of this embodiment has an abutment surface 6320 that is in surface contact with the entire area of the peripheral end surface (end surface) 6220 excluding the connection portion with the first portion 621 in the second portion 622. Further, the distal end portion of the second support portion 632 (the end portion opposite to the first support portion 631 in the Z-axis direction) covers the insertion piece 6222 of the second portion 622 and is provided at the distal end portion of the stay 303. The insertion piece 6222 is inserted into the hole 305 (see FIG. 10). Further, the second support portion 632 has a pair of side wall portions 6321 facing each other such that a screw portion 611 (module terminal 61) protruding from the second portion 622 of the conductive member 62 is positioned therebetween (see FIG. 9). . At the end edge portion in the X-axis direction of one side wall portion 6321, the terminal cover 64 has a predetermined axis C (an axis extending in the Z-axis direction in the example of the present embodiment) C extending along the end edge portion as a rotation center. It is attached so that rotation is possible (refer FIG.5 and FIG.6). In a state where the terminal cover 64 is closed (a state where the terminal cover 64 is stretched between the edges of the pair of side wall portions 6321: see FIG. 5), the module terminal 61 is surrounded by the pair of side wall portions 6321 and the terminal cover 64. On the other hand, in a state where the terminal cover 64 is opened (a state where the terminal cover 64 is rotated around a predetermined axis C: see FIG. 6), the tip end side of the module terminal 61 is open.

  A part of the first portion 621 is sandwiched between the pressing portion 635 and the first support portion 631. The pressing portion 635 of the present embodiment is located between the end portion on one side in the Y-axis direction (center side of the terminal member in the Y-axis direction) and the outer side in the X-axis direction between the first support portion 631 and the first portion 621. The end is sandwiched.

  The base part 63 having the support part 630 and the pressing part 635 as described above is fixed to the support piece 302 of the terminal member 30 by a metal rivet 65 (see FIGS. 9 and 11). In other words, the rivet 65 has the base part 63 and the end member 30 in a state of passing through the base part 63 (specifically, the first support part 631) and the end member 30 (specifically, the support piece 302). It is concluded. The rivet 65 of the present embodiment penetrates a portion of the base portion 63 where the conductive member 62 is not disposed.

  According to the power storage device 1 described above, the conductive member 62 (specifically, the first portion 621) is provided on the support portion 630 (specifically, the first support portion 631) fixed to the termination member 30 in the base portion 63. Since at least a part of the support member 630 is sandwiched between the support portion 630 and the support member 630 in a supported state, displacement of the conductive member 62 (specifically, displacement in a direction away from the end member 30) is effective. Can be suppressed.

  The power storage device 1 of the present embodiment includes a holding member 3 that includes a termination member 30 and holds the power storage element 10. As described above, since the power storage device 1 includes the holding member 3, vibrations transmitted to each part of the holding member 3 including the terminal member 30 as well as the terminal member 30 are transmitted to the terminal block 6. For this reason, vibration or the like of the device or the like in which the power storage device 1 is mounted is easily transmitted by the terminal block 6, but at least a part of the conductive member 62 (a part of the first part 621 in the example of the present embodiment) is pressed down. Since the portion 635 is sandwiched between the support portion 630, the displacement of the conductive member 62 due to the vibration or the like is more effectively suppressed.

  In the power storage device 1 of the present embodiment, the conductive member 62 has a first part 621 extending in the X-axis direction and a second part 622 extending from the first part 621 in the Z-axis direction, and the screw portion 611 of the module terminal 61 is Projecting from the second portion 622. Further, in the base portion 63, the pressing portion 635 sandwiches at least a part of the first portion 621 with the support portion 630. Therefore, the first portion 621 that is continuous with the second portion 622 by the torque generated in the second portion 622 when a nut or the like is tightened on the screw portion 611 in order to connect an external connection terminal or the like to the module terminal 61. Is inclined with respect to the support portion 630, and a part thereof is about to be separated from the support portion 630. However, since the first portion 621 is sandwiched between the pressing portion 635 and the support portion 630, the separation (eg, rattling) of the first portion 621 due to the torque can be prevented.

  In the power storage device 1 of the present embodiment, the second portion 622 of the conductive member 62 has a non-circular contour when viewed in the X-axis direction, and the second support portion 632 of the base portion 63 uses the screw portion 611 as the rotation axis. A contact surface 6320 that extends in a direction intersecting with the torque and contacts the peripheral end surface 6220 constituting the contour of the second portion 622 (conductive member 62). For this reason, even if a torque with the screw portion 611 as the rotation axis is generated in the second portion 622 when a nut or the like is tightened on the screw portion 611 in order to connect an external connection terminal or the like to the module terminal 61, the torque and The contact surface 6320 that spreads in the intersecting direction comes into surface contact with the peripheral end surface 6220 of the second portion 622 and receives the torque. As a result, rotation due to the torque of the second portion 622 (conductive member 62) can be prevented.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the power storage device according to the present embodiment differs from the power storage device 1 of the first embodiment only in the configuration of the terminal block. Therefore, in the following, the same configuration as the power storage device 1 of the first embodiment is used. Detailed description will be omitted using the same reference numerals, and only terminal blocks having different configurations will be described in detail.

  As shown in FIGS. 12 and 13, the power storage device includes a power storage element 10 having a cell terminal (first external terminal) 13, spacers 2A and 2B adjacent to the power storage element 10, and power storage element 10 and spacers 2A and 2B. The holding member 3 having the terminal member 30, the bus bar 5 connected to the cell terminal 13, and the terminal block (terminal portion) 206 attached to the terminal member 30 are provided. Further, the power storage device 1 includes an insulator 4 disposed between the power storage element 10 and the holding member 3.

  14 to 17, the terminal block 206 includes a module terminal 61, a conductive member 262 that electrically connects the module terminal 61 and the cell terminal 13, and a base portion 263 that holds the conductive member 262. And having. The terminal block 206 of this embodiment is formed by insert molding. For this reason, in the terminal block 206, the conductive member 262 and the base portion 263 are integrated.

  The conductive member 262 is a plate-like member having conductivity. The conductive member 262 of the present embodiment is a plate-like member that extends in the XY plane direction and is long in the Y-axis direction. In the conductive member 262, a part of the conductive member 262 is covered with the base portion 263, and the end bus bar 52 is connected to a portion not covered with the base portion 263 (in the example of the present embodiment, welding) ( (See FIG. 12). Further, the screw portion 611 of the module terminal 61 protrudes from the conductive member 262. The screw portion 611 of the present embodiment protrudes from the central portion of the conductive member 262 in the Z-axis direction. As shown in FIG. 16, the conductive member 262 has a non-circular contour when viewed from the direction in which the screw portion 611 protrudes. This contour is constituted by a peripheral end face (end face) 2620 of the conductive member 262.

  The base part 263 is fixed to the terminal member 30 and supports the conductive member 262 on the side where the terminal member 30 is located with respect to the conductive member 262 (see FIG. 17). A pressing portion 2635 that sandwiches at least a part of the conductive member 262 therebetween (see FIG. 16). The base part 263 of the present embodiment is made of resin in which a support part 2630 and a pressing part 2635 are integrally formed.

  The support portion 2630 has a concave portion 2633 into which the conductive member 262 is fitted. The concave portion 2633 includes a support surface 26331 that supports the conductive member 262 so as to come into surface contact with the conductive member 262 from the end member 30 side in the Z-axis direction, and a torque having a screw portion 611 generated in the conductive member 262 as a rotation axis. An abutment surface 26332 that extends in the intersecting direction and is in surface contact with at least a portion of the peripheral end surface 2620. The contact surface 26332 of this embodiment is provided upright from the periphery of the support surface 26331 and is in surface contact with the peripheral end surface 2620 of the conductive member 262 over the entire periphery.

  A part of the conductive member 262 is sandwiched between the pressing portion 2635 and the support portion 2630. In the present embodiment, the holding portion 2635 is between the support portion 2630 and one end portion of the conductive member 262 in the Y-axis direction (center side of the termination member 30 in the Y-axis direction) and the other end portion (module terminal). 61 on the opposite side with the screw portion 611 interposed therebetween.

  The base part 263 having the support part 2630 and the pressing part 2635 as described above is fixed to the support piece 302 of the terminal member 30 by a metal rivet 65 (see FIG. 16). That is, the rivet 65 fastens the base part 263 and the terminal member 30 in a state where the base part 263 and the terminal member 30 (supporting piece 302) pass through. Similarly to the first embodiment, the rivet 65 of the present embodiment also penetrates a portion of the base portion 263 where the conductive member 262 is not disposed.

  In the power storage device 1 described above, the conductive member 262 has a non-circular peripheral end surface 2620 that surrounds the screw portion 611 in the circumferential direction, and the base portion 263 extends in a direction intersecting with the torque having the screw portion 611 as a rotation axis, and The peripheral end surface 2620 has an abutting surface 26332 that is in surface contact with at least a part of a portion that spreads in a direction that is in tolerance with the torque. For this reason, even when a torque is generated on the conductive member 262 using the screw portion 611 as a rotation axis when a nut or the like is tightened on the screw portion 611 in order to connect a connection terminal or the like from the outside to the module terminal 61, it intersects with the torque. The contact surface 26332 that spreads in the direction in which the conductive member 262 contacts the peripheral end surface 2620 of the conductive member 262 and receives the torque, so that the rotation of the conductive member 262 due to the torque can be prevented.

  Moreover, in the power storage device 1 of this embodiment, since the terminal block 206 is an insert-molded product in which the conductive member 262 and the base portion 263 are integrated, the peripheral end surface (that is, the thickness) of the plate-shaped conductive member 262. The circumferential end surface 2620 having a small dimension in the direction and the contact surface 26332 of the base portion 263 are surely in surface contact over the entire circumference of the circumferential end surface 2620. Thereby, the rotation of the conductive member 262 due to the torque generated when connecting an external connection terminal or the like to the module terminal 61 can be prevented more reliably.

  The power storage device of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, the configuration of another embodiment can be added to the configuration of a certain embodiment, and a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment. Furthermore, a part of the configuration of an embodiment can be deleted.

  In the terminal blocks 6 and 206 of the first and second embodiments, the rivets 65 penetrate the base portions 63 and 263 and the terminal member 30 (support piece 302), and the base portions 63 and 263 Although the termination | terminus member 30 is fastened, it is not limited to this structure. For example, as shown in FIG. 18, a rivet 65 penetrates through the conductive members 62 and 262, the base portions 63 and 263, and the termination member 30, and these conductive members 62 and 262, the base portions 63 and 263, and the termination member. 30 may be used. In this case, the insulating member 70 is disposed between the rivet 65 and the inner peripheral surface 625 of the hole through which the rivet 65 passes in the conductive members 62 and 262. According to this configuration, the insulating member 70 maintains the insulation between the rivet 65 and the conductive members 62 and 262, and the conductive members 62 and 262 and the base portions 63 and 263 are terminated by the hard metal rivet 65. The member 30 can be firmly fastened. As a result, in the power storage device 1, the vibrations of the conductive members 62 and 262 can be more reliably suppressed.

  In this case (when the rivet 65 penetrates the conductive members 62 and 262, the base portions 63 and 263, and the termination member 30 and the insulating member 70 is disposed), as shown in FIG. 206 is a metal cylinder that surrounds the rivet 65 between the insulating member 70 and the rivet 65 (specifically, a shaft-like portion that penetrates the base portions 63 and 263 of the rivet 65 is surrounded in the circumferential direction). A shaped member 71 may be provided. In the example shown in FIG. 19, the cylindrical member 71 is cylindrical. As described above, the metallic cylindrical member 71 is arranged so as to surround the portions of the rivet 65 that penetrate the conductive members 62 and 262, the base portions 63 and 263, and the terminal member 30, and thus the outer side thereof. It is possible to prevent the stress from the rivet 65 (stress generated when the rivet 65 is caulked, etc.) from being transmitted to the insulating member 70 disposed on the surface. Thereby, it is possible to prevent the insulating member 70 from being deformed by the stress.

  Moreover, when the cylindrical member 71 is arrange | positioned, as shown in FIG. 20, the base parts 63 and 263 and the insulating member 70 may be integral. In this case, the terminal blocks 6 and 206 may be insert molded products in which the conductive members 62 and 262, the base portions 63 and 263, and the insulating member 70 are integrated. According to such a configuration, it is possible to suppress the formation of a gap between the inner peripheral surface 625 of the hole in the conductive members 62 and 262 and the insulating member 70. As a result, the insulation between the rivet 65 and the conductive members 62 and 262 can be effectively maintained. In addition, even if it is the structure by which the cylindrical member 71 is not arrange | positioned, the base parts 63 and 263 and the insulating member 70 may be integral.

  Moreover, the specific shape of the cylindrical member 71 is not limited. For example, as shown in FIG. 21, the insulating member 70 may be configured by a plurality of members (two in the example shown in FIG. 21), or a part other than the cylindrical part (in the example shown in FIG. 21, a bowl shape). Or the like. The insulating member 70 is specifically as follows, for example.

  The rivet 65 has a shaft portion 651 that passes through the conductive members 62 and 262, the base portions 63 and 263, and the end member 30, and the penetrating direction at a position spaced in the penetrating direction of the shaft portion 651 in the shaft portion 651. And a pair of large-diameter portions 652 sandwiching the conductive members 62 and 262, the base portions 63 and 263, and the termination member 30 therebetween, respectively.

  The insulating member 70 includes a first member 75 and a second member 76.

  The first member 75 includes a first cylindrical portion 751 surrounding the shaft portion 651 of the rivet 65, one large diameter portion 652 of the rivet 65 (upward in the example shown in FIG. 21), and the one large diameter portion 652. First spreading from the end portion of the first cylindrical portion 751 between the adjacent conductive members 62 and 262, the base portions 63 and 263, or the terminal member 30 (the base portions 63 and 263 in the example shown in FIG. 21). And a collar portion 752. In the example shown in FIG. 21, the first member 75 also has a first standing portion 753 that rises (is erected) so as to surround the large-diameter portion 652 of the rivet 65 from the first flange portion 752.

  The second member 76 includes a second cylindrical portion 761 that surrounds the first cylindrical portion 751 between the first cylindrical portion 751 and the inner peripheral surface 625 of the hole through which the rivet 65 passes, and the other of the rivets 65 (see FIG. The large-diameter portion 652 in the lower portion in the example shown in FIG. 21 and the conductive members 62 and 262, the base portions 63 and 263 adjacent to the other large-diameter portion 652, or the termination member 30 (in the example shown in FIG. 21, the termination member) 30) and a second flange portion 762 extending from the end portion of the second cylindrical portion 761. In the example shown in FIG. 21, the second member 76 rises (is erected) from the second flange portion 762 so as to surround the large-diameter portion 652 of the rivet 65, similarly to the first member 75. A portion 763 is also included.

  According to this configuration, the flange portion of the insulating member 70 between the large diameter portion 652 and a member adjacent to the large diameter portion 652 (the conductive members 62 and 262, the base portions 63 and 263, or the termination member 30). Since the first flange 752 of the first member 75 or the second flange 762 of the second member 76 is disposed, the rivet 65 and the termination member 30 are disposed between the rivet 65 and the conductive members 62 and 262. A sufficient creepage distance can be secured. And when the 1st member 75 has the 1st standing part 753 and the 2nd member 76 has the 2nd standing part 763, the said creeping distance becomes larger.

  Moreover, the specific fixing method to the termination | terminus member 30 of the base parts 63 and 263 is not limited. For example, in the power storage devices 1 of the first and second embodiments, the base parts 63 and 263 are fixed to the terminal member 30 by the rivets 65, but may be fixed by other fixing members and fixing methods. For example, specifically, the base parts 63 and 263 may be fixed to the termination member 30 using bolts and nuts.

  In the power storage device 1 according to the first and second embodiments, the terminal blocks 6 and 206 are formed by insert molding, but are not limited to this configuration. After the base parts 63 and 263 are formed, the terminal blocks 6 and 206 may be formed by fitting the conductive members 62 and 262 into the recesses 633 and 2633 of the base parts 63 and 263.

  When the base parts 63 and 263 of the terminal blocks 6 and 206 include the holding parts 635 and 2635 and the contact surfaces 6332 and 26332, the terminal blocks 6 and 206 are connected to the conductive members 62 and 262 and the base parts 63 and 263, respectively. An insert-molded product in which the pressing portions 635 and 2635 and the contact surfaces 6332 and 26332 are integrated may be used. In the case where the conductive members 62 and 262 are fitted into the base portions 63 and 263, the conductive members 62 and 262 and the holding portions 635 and 2635 or the conductive members 62 and 262 and the contact surfaces 6332 and 26332 are interposed. If a gap is not formed, it will be difficult to fit. On the other hand, according to the above configuration (insert molded product), gaps are formed between the conductive members 62 and 262 and the holding portions 635 and 2635 and between the conductive members 62 and 262 and the contact surfaces 6332 and 26332. This can be suppressed. As a result, the rotation of the conductive members 62 and 262 caused by the displacement of the conductive members 62 and 262 and the torque having the screw portion 611 as the rotation axis can be effectively suppressed.

  The specific configuration of the conductive members 62 and 262 is not limited. As for the shape (contour, bending angle, number of bent portions, etc.) of the conductive members 62 and 262, a portion where the screw portion 611 of the module terminal 61 penetrates and a portion where the end bus bar 52 is connected are secured. It is set appropriately according to the state.

  In the power storage device 1 of the first and second embodiments, the support portions 630 and 2630 and the pressing portions 635 and 2635 are integrated in the terminal blocks 6 and 206, but may be separate.

  In the power storage device 1 of the first and second embodiments, the conductive members 62 and 262 and the end bus bar 52 may be integrated.

  In the power storage device 1 of the first and second embodiments, the module terminal 61 has the screw portion 611. However, the module terminal 61 does not have the screw portion 611 and may be connected to the output terminal by welding or the like.

  In the terminal block 206 of the second embodiment, the contact surface 26332 of the base portion 263 is in surface contact with the peripheral end surface 2620 of the conductive member 262 over the entire circumference, but the configuration is not limited thereto. If the conductive member 262 has a non-circular peripheral end surface 2620 and the contact surface 26332 of the base portion 263 extends in a direction intersecting with the torque having the screw portion 611 as the rotation axis, the corresponding contact surface 26332 is Further, only a part (including a plurality of locations) of the peripheral end surface 2620 of the conductive member 262 may be in surface contact. Even with such a configuration, even when a nut or the like is tightened on the screw portion 611 in order to connect a connection terminal or the like from the outside to the module terminal 61, the torque is generated even if a torque about the screw portion 611 is generated on the conductive member 262. The contact surface 26332 extending in the direction intersecting with the surface contacts the peripheral end surface 2620 of the conductive member 262 and receives the torque. Thereby, rotation resulting from the torque of the conductive member 262 can be prevented.

  DESCRIPTION OF SYMBOLS 1 ... Power storage device, 10 ... Power storage element, 11 ... Electrode body, 12 ... Case, 120 ... Case main body, 121 ... Cover plate, 123 ... Closure part, 124 ... Trunk part, 125 ... First wall, 126 ... Second wall , 13 ... external terminal (cell terminal), 15 ... insulating member, 2A ... internal spacer, 20A ... base, 21A ... regulation part, 2B ... external spacer, 20B ... base, 201B ... base body, 202B ... external contact part, 203B ... Internal contact part, 21B ... Restriction part, 3 ... Holding member, 30 ... Termination member, 300 ... Main body, 301 ... Pressure contact part, 302 ... Supporting piece, 303 ... Stay, 304 ... Inner peripheral surface, 305 ... Hole, 31 ... Frame, 310 ... first connection part, 311 ... second connection part, 312 ... support part, 313 ... reinforcement part, 4 ... insulator, 40 ... first insulation part, 41 ... second insulation part, 42 ... third insulation part , 43 ... fourth insulating part 5 ... Bus bar, 51 ... Intermediate bus bar, 52 ... End bus bar, 6, 206 ... Terminal block, 61 ... External terminal (module terminal), 611 ... Screw part, 612 ... Head, 62, 262 ... Conductive member, 2620 ... Peripheral end face, 621 ... First part, 6210 ... Peripheral end face, 622 ... Second part, 6220 ... Peripheral end face (end face) of the second part, 6221 ... Rectangular part, 6222 ... Insertion piece, 625 ... Inner peripheral face , 63, 263 ... base part, 630, 2630 ... support part, 631 ... first support part, 632 ... second support part, 6321 ... side wall part, 633, 2633 ... recessed part, 6331, 26331 ... support surface, 6320, 6332, 26332 ... contact surface, 635, 2635 ... pressing part, 64 ... terminal cover, 65 ... rivet, 70 ... insulating member, 71 ... cylindrical member, 75 ... first member, 751 ... first cylindrical part, 752 ... First pass , 753 ... First standing part, 76 ... Second member, 761 ... Second cylinder part, 762 ... Second flange part, 763 ... Second standing part, 800 ... Output line, 800A ... Connection terminal, 801 ... Nut, 802 ... Set screw, 803 ... electrode terminal, 804 ... relay bus bar, 805 ... end plate, 806 ... base, C ... predetermined axis

Claims (9)

A power storage element having a first external terminal;
A termination member adjacent to the electricity storage element;
A second external terminal, a conductive member that electrically connects the second external terminal and the first external terminal, a base portion that holds the conductive member, the conductive member, the base portion, and the termination member. A metal rivet to be fastened in a penetrating state, and a terminal block having an insulating member disposed between the rivet and an inner peripheral surface of a hole through which the rivet penetrates in the conductive member,
The base is
A support portion fixed to the termination member and supporting the conductive member on a side where the termination member is located with respect to the conductive member;
A power storage device comprising: a pressing portion that sandwiches at least a part of the conductive member between the supporting portion and the support portion. The conductive member includes a first part that extends in a predetermined direction and is fixed to the terminal member via the support part, and a second part that extends from the first part in a direction intersecting the predetermined direction. Have
The pressing part sandwiches at least a part of the first part between the support part,
The power storage device according to claim 1, wherein the second external terminal has a screw portion protruding from the second portion. The second portion of the conductive member has a non-circular outline in a direction view in which the screw portion protrudes,
The said base part has a contact surface which spreads in the direction which cross | intersects the torque which uses the said thread part as a rotating shaft, and has surface contact with at least one part of the end surface which comprises the said outline of the said electrically-conductive member. The power storage device described.   The power storage device according to any one of claims 1 to 3, wherein the terminal block includes a metallic cylindrical member that surrounds the rivet between the insulating member and the rivet.   The power storage device according to claim 1, wherein the base portion and the insulating member are integrated. The rivet has a shaft portion that penetrates the conductive member, the base portion, and the terminal member, and a surface direction perpendicular to the penetration direction at a position spaced in the penetration direction of the shaft portion in the shaft portion. Each having a pair of large-diameter portions that widen and sandwich the conductive member, the base portion, and the terminal member therebetween,
The insulating member is
The first cylindrical portion surrounding the periphery of the shaft portion, the one large diameter portion of the rivet and the conductive member, the base portion, or the terminal member adjacent to the one large diameter portion. A first member having a first flange extending from an end of the one cylinder portion,
A second cylindrical portion surrounding the first cylindrical portion between the first cylindrical portion and the inner peripheral surface of the hole through which the rivet passes; the other large diameter portion of the rivet; and the other large diameter portion A second member having a second flange extending from an end portion of the second cylindrical portion between the conductive member, the base portion, or the terminal member adjacent to each other. The power storage device according to any one of 5. A power storage element having a first external terminal;
A termination member adjacent to the electricity storage element;
A terminal block having a second external terminal, a conductive member that electrically connects the second external terminal and the first external terminal, and a base portion that holds the conductive member;
The base is
A support portion fixed to the termination member and supporting the conductive member on a side where the termination member is located with respect to the conductive member;
A holding part that sandwiches at least a part of the conductive member between the support part, and
The second external terminal has a screw portion protruding from the conductive member,
The conductive member is a plate-like member that spreads in a plane direction orthogonal to the screw portion, and has a non-circular outline in a direction view in which the screw portion protrudes,
The base portion has an abutting surface that extends in a direction intersecting with a torque having the screw portion as a rotation axis and is in surface contact with at least a part of an end surface constituting the contour of the conductive member;
The power storage device, wherein the contact surface is in surface contact with the peripheral end surface of the plate-like conductive member over the entire circumference and is integrated with the pressing portion. The terminal block is
Fastening and penetrating the conductive member, the base portion and the terminal member, and a metal rivet,
The power storage device according to claim 7, further comprising: an insulating member disposed between the rivet and an inner peripheral surface of a hole through which the rivet passes in the conductive member.   The power storage device according to claim 1, wherein the terminal block is an insert-molded product in which the conductive member and the base portion are integrated.