JP2017152373A - Energy storage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy storage apparatus which can assume a state where electricity cannot be inputted to or outputted from the energy storage apparatus.SOLUTION: An energy storage apparatus includes: a plurality of energy storage elements disposed in a row in a first direction; and a bus bar configured to connect external terminals 13 of energy storage elements to each other. The bus bar includes: a first member 55 having a first connection portion 551 connected to the external terminal 13 of one energy storage element and a first extension portion extending from the first connection portion 551; and a second member 56 having a second connection portion 561 connected to the external terminal 13 of another energy storage element and a second extension portion extending from the second connection portion 561. The first extension portion has a first conductive surface, and the second extension portion has a second conductive surface which is made to overlap with the first conductive surface in a separable manner in a state where the second conductive surface faces the first conductive surface.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a power storage device including a power storage element having an external terminal and a bus bar connected to the external terminal.

  Conventionally, an assembled battery including a plurality of battery cells is known (see Patent Document 1). Specifically, the assembled battery includes a plurality of battery cells each having an electrode terminal composed of a positive electrode terminal and a negative electrode terminal, and a plurality of bus bars connecting the electrode terminals so as to connect all the battery cells in series. Is provided.

  In the assembled battery, an end portion of the bus bar to which the positive electrode terminal of the battery cell located at one end of a path through which electricity flows is connected to a positive electrode side terminal as a total terminal of the entire assembled battery. Further, the end portion of the bus bar to which the negative electrode terminal of the battery cell located at the other end of the path through which electricity flows is connected to a negative electrode side terminal as a total terminal of the entire assembled battery.

  In the above assembled battery, the bus bar is connected (fixed) to the electrode terminal by laser welding or arc welding. For this reason, the bus bar cannot be easily removed from the electrode terminal. Accordingly, in the assembled battery, the positive terminal (positive terminal) and the negative terminal (negative terminal) Electric input / output is always possible. For this reason, in the assembled battery, the positive electrode side terminal and the negative electrode side terminal can be connected to the device where the assembled battery is installed, etc. The state in which electricity can be input and output is maintained.

  When the bus bar is connected to the electrode terminal by a bolt or the like, the bus bar can be detached from the electrode terminal. However, if torque at the time of connection by the bolt or the like is generated many times at the electrode terminal, the airtightness of the battery cell may be affected. For this reason, it is desired that the battery cell can be in a state where electricity cannot be input and output from the positive electrode side terminal and the negative electrode side terminal in the assembled battery other than the electrode terminal.

JP 2013-120690 A

  Therefore, an object of the present embodiment is to provide a power storage device that can be in a state where electricity cannot be input and output.

The power storage device of this embodiment is
A plurality of power storage elements each having an external terminal and arranged in the first direction;
A bus bar for connecting the external terminals of different power storage elements, and
The bus bar is connected to at least a first member connected to the external terminal of a predetermined power storage element of the plurality of power storage elements and the external terminal of another power storage element of the plurality of power storage elements. A second member,
The first member and the second member are directly or indirectly conducted to form a conduction path,
The conduction path is configured to be separated or divided along the way.

  According to such a configuration, the power storage device can be made in a state where it cannot input and output electricity by separating or dividing the middle of the conduction path.

In the power storage device,
The first member has a first connection part connected to the external terminal of a predetermined power storage element among the plurality of power storage elements, and a first extending part extending from the first connection part,
The second member has a second connection part connected to the external terminal of another power storage element among the plurality of power storage elements, and a second extension part extending from the second connection part,
The first extending portion has a first conduction surface,
The second extending portion may have a second conduction surface that is detachably superimposed on the first conduction surface in a state of facing the first conduction surface.

  According to such a configuration, since the first conduction surface and the second conduction surface are detachably stacked, the power storage device is electrically connected by separating the first conduction surface and the second conduction surface. I / O can be disabled.

in this case,
Each of the first conductive surface and the second conductive surface may be a plane including a first direction.

  According to such a configuration, since both conductive surfaces are planes orthogonal to the second direction, even if a manufacturing error or the like occurs in the interval (interval in the first direction) between the storage elements to which the external terminals are connected by the bus bar. The first conduction surface and the second conduction surface can be relatively moved in the first direction in a surface contact state. Thereby, even if the said manufacturing error etc. arise, a 1st conduction | electrical_connection surface and a 2nd conduction | electrical_connection surface can be reliably conduct | electrically_connected (a surface contact).

In the power storage device,
At least one of the first extension part and the second extension part is closer to the first connection part or to the second connection part than the first conduction surface or the part including the second conduction surface. You may have the site | part bent in the near position.

  By having such a bent part, even if the interval in the first direction of the power storage element to which the external terminals are connected by the bus bar is changed, the bent part is expanded or more bent, It is possible to suppress the stress caused by the change in the distance from concentrating on the parts (first and second connection portions) connected to the external terminals in the member and the second member. Thereby, the damage resulting from the change of the said space | interval is prevented in a 1st member and a 2nd member.

In the power storage device,
An adjacent member disposed between the power storage elements adjacent in the first direction;
An attachment member detachably attached to the adjacent member,
The bus bar connects the external terminals of the electricity storage elements arranged on both sides of the adjacent member in the first direction,
The mounting member includes a first conduction part that is a part including the first conduction surface of the first extension part, and a second conduction part that is a part including the second conduction surface of the second extension part. Is pressed against the adjacent member,
Each of the first conduction surface and the second conduction surface may be a plane that intersects the direction in which the mounting member presses the first conduction portion and the second conduction portion toward the adjacent member.

  According to such a configuration, the first conduction portion and the second conduction portion are pressed against the adjacent member by the mounting member, so that the first conduction surface and the second conduction surface are pressed against each other, thereby vibrating the power storage device. Even if etc. are added, the conduction | electrical_connection state of a 1st conduction | electrical_connection part and a 2nd conduction | electrical_connection part can be maintained reliably.

In the power storage device,
The bus bar includes a third member that is overlapped with the first extending portion and the second extending portion from the side opposite to the adjacent member,
The adjacent member has a female screw portion at a position overlapping the bus bar in the second direction,
The mounting member is a male screw that is screwed into the female screw portion in a state of passing through the first extending portion, the second extending portion, and the third member in an overlapping state from the side of the third member. Part
The third member may have a contact portion that contacts the adjacent member in a rotation direction when the male screw portion is screwed into the female screw portion.

  According to this configuration, since the third member that sandwiches the first member and the second member between the adjacent members has the contact portion that contacts the adjacent member in the rotation direction of the external thread portion, the external thread portion is It is possible to prevent the torque when screwed into the female thread portion from being transmitted to the first member and the second member by the third member. Thereby, it can prevent that the stress resulting from the said torque is added to the connection part connected to the external terminal.

In the power storage device,
You may provide the insulating member inserted so that extraction is possible between said 1st conduction surface and said 2nd conduction surface.

  According to this configuration, by inserting or extracting the insulating member between the first conduction surface and the second conduction surface, it is possible to switch between a state where electricity can be input and output from the power storage device and a state where electricity cannot be input. That is, when the insulating member is inserted between the first conduction surface and the second conduction surface, the conduction between the first conduction portion and the second conduction portion is interrupted, and the power storage device cannot input and output electricity. On the other hand, when the insulating member is pulled out, the first conduction portion and the second conduction portion are conducted (the first conduction surface and the second conduction surface are in surface contact), and the power storage device conducts electricity. It will be ready for input / output.

In the power storage device,
The first extending portion has a first guide portion extending from an edge of the first conduction surface,
The second extending portion has a second guide portion extending from a position corresponding to the first guide portion at an edge of the second conduction surface,
The distance between the first guide part and the second guide part may increase as the distance from the first conduction surface and the second conduction surface increases.

  According to such a configuration, the distance between the first guide portion and the second guide portion decreases as the first conductive surface and the second conductive surface overlap each other, so the first conductive surface and the second conductive surface When a member such as an insulating member is inserted between the conductive surface, the member is guided by the first guide portion and the second guide portion, whereby the member is interposed between the first conductive surface and the second conductive surface. Is easier to insert.

In the power storage device,
An adjacent member disposed between the storage elements adjacent in the first direction,
The bus bar has a connection member that connects the first member and the second member so as to be conductive, and connects the external terminals of the power storage elements arranged on both sides in the first direction of the adjacent member,
The connecting member may be in contact with at least one of the first member and the second member so as to be separable.

  According to such a configuration, since the conduction path is divided in the middle by separating the connection member from at least one of the first member and the second member, the power storage device can be made in a state where electricity cannot be input and output.

In addition, the power storage device of the present embodiment is
A storage element having an external terminal;
Total terminals used for input and output of electricity to the outside,
A bus bar for electrically connecting the external terminal and the total terminal;
The bus bar is
A first member having a first connecting portion connected to the external terminal, and a first extending portion extending from the first connecting portion;
A second member having a second connecting portion connected to the total terminal, and a second extending portion extending from the second connecting portion;
Have
The first extending portion has a first conduction surface,
The second extending portion has a second conduction surface that is detachably overlapped with the first conduction surface in a state of facing the first conduction surface.

  According to such a configuration, since the first conduction surface and the second conduction surface are detachably stacked, the power storage device is electrically connected by separating the first conduction surface and the second conduction surface. I / O can be disabled.

  As mentioned above, according to this embodiment, the electrical storage apparatus which can be made into the state which cannot input / output electricity can be provided.

FIG. 1 is a perspective view of a power storage device according to the present embodiment. FIG. 2 is an exploded perspective view in a state where a part of the configuration of the power storage device is omitted. 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 an enlarged perspective view of the first bus bar and its periphery in the power storage device. FIG. 6 is an exploded perspective view of the first bus bar and its periphery in the power storage device. FIG. 7 is an enlarged perspective view of the first bus bar and its periphery with the mounting member and the third member removed. FIG. 8 is a perspective view of the second bus bar. FIG. 9 is a perspective view of the end bus bar. FIG. 10 is a cross-sectional view taken along the line XX in FIG. 1 and is a cross-sectional view of the terminal block and its periphery. FIG. 11 is a perspective view of the insulating plate. FIG. 12 is an enlarged perspective view of the first bus bar and its surroundings with the insulating plate inserted between the first member and the second member with the mounting member and the third member removed. FIG. 13 is an exploded perspective view of a terminal block and its periphery in a power storage device according to another embodiment. FIG. 14 is an enlarged cross-sectional view of the terminal block and its periphery. FIG. 15 is a diagram for explaining a first bus bar according to another embodiment. FIG. 16 is a view for explaining a first bus bar according to another embodiment. FIG. 17 is a view for explaining a first bus bar according to another embodiment. FIG. 18 is a schematic diagram for explaining a detour unit according to another embodiment. FIG. 19 is a perspective view of an insulating plate according to another embodiment. FIG. 20 is a partially enlarged perspective view of the state in which the insulating plate according to another embodiment is inserted into the long hole of the bus bar plate. FIG. 21 is a perspective view of an insulating plate according to another embodiment. FIG. 22 is a view for explaining a state in which the insulating plate is disposed between the first member and the second member constituting the intermediate bus bar. FIG. 23 is a diagram for explaining a state in which an insulating plate according to another embodiment is disposed between a first member and a second member that constitute an intermediate bus bar.

  Hereinafter, an 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 plurality of power storage elements 10 each having an external terminal 13 and arranged in a predetermined direction, and a plurality of bus bars 5 that electrically connect the external terminals 13 of different power storage elements 10 to each other. And comprising. In addition, the power storage device 1 includes a plurality of adjacent members 2 adjacent to the power storage element 10, a holding member 3 that holds the plurality of power storage elements 10 and the plurality of adjacent members 2 together, a plurality of power storage elements 10 and a holding member. And an insulator 4 disposed between the two. The power storage device 1 of the present embodiment includes an attachment member 6 that is detachably attached to the adjacent member 2. The power storage device 1 also includes a pair of terminal blocks 7 having a total terminal 71 (see FIG. 10) used for external input / output of electricity.

  As shown in FIGS. 3 and 4, each of the plurality of power storage elements 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 electrodes disposed on the outer surface of the case 12. And an external terminal 13.

  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 12 of this embodiment has a rectangular parallelepiped shape.

  The case main body 120 includes a rectangular plate-shaped closing portion 123 and a cylindrical body portion 124 connected to the periphery of the closing portion 123. The trunk portion 124 has a rectangular tube shape along the outline of the closing portion 123, that is, a flat rectangular tube shape. One end of the body portion 124 is closed by the closing portion 123, and the other end is opened. That is, the case main body 120 has a flat bottomed 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 an outline corresponding to the opening peripheral edge of the case body 120 when viewed from the normal direction. A pair of external terminals 13 are attached to the lid plate 121 of the present embodiment in a state in which the pair of external terminals 13 are electrically connected to each electrode (positive electrode, negative electrode) of the electrode body 11. In the lid plate 121 of the present embodiment, the pair of external terminals 13 are arranged at intervals in the longitudinal direction of the rectangular lid plate 121.

  In the case 12 described above, the electrode body 11 is housed inside, and 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. A boundary portion between the cover plate 121 and the case body 120 is welded.

  In the power storage device 1 of the present embodiment, a plurality of power storage elements 10 configured as described above are arranged. Specifically, the plurality of power storage elements 10 are arranged so that the wide wall portions of the trunk portion 124 face each other. In the following description, the direction in which the power storage elements 10 are aligned (the direction in which the wide walls of the body portion 124 face each other: the first direction) is the X-axis direction in the orthogonal coordinate system. Further, the direction (third direction) in which the narrow wall portions of the body portion 124 of the energy storage device 10 face each other is the Y-axis direction in the orthogonal coordinate system, and the cover plate 121 and the closing portion 123 of the energy storage device 10 face each other. The direction (second direction) is the Z-axis direction of the orthogonal coordinate system. 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 adjacent member 2 is between the power storage elements 10 aligned in the X-axis direction or between the power storage element 10 and a member aligned in the X-axis direction with respect to the power storage element 10 (part of the holding member 3 in the example of the present embodiment). It is arranged between. As shown in FIG. 2, the adjacent member 2 includes a plurality of types of adjacent members. The adjacent member 2 of the present embodiment includes a first adjacent member (adjacent member) 21 adjacent to the power storage element 10 disposed in the middle of the power storage device 1 in the X-axis direction, and a plurality of power storage elements 10 arranged in the X-axis direction. A second adjacent member 22 adjacent to the power storage element 10 at the end of the first adjacent member 22, and a third adjacent member 23 adjacent to the power storage element 10 between the first adjacent member 21 and the second adjacent member 22. Including.

  The first adjacent member 21 is disposed between the power storage elements 10 adjacent in the X-axis direction. Thereby, a predetermined interval (creeping distance or the like) is secured between the power storage elements 10 arranged in the X-axis direction via the first adjacent member 21. The first adjacent member 21 is connected (fixed) to the holding member 3.

  Specifically, the first adjacent member 21 includes a main body portion (hereinafter referred to as “first main body portion”) 211 adjacent to the power storage element 10 (case main body 120) and a power storage element adjacent to the first main body portion 211. And a restricting portion (hereinafter referred to as “first restricting portion”) 212 that restricts movement of the tenth main body portion 211 with respect to the first body portion 211. The first adjacent member 21 includes a shaft portion 213 that engages with the holding member 3.

  The first main body 211 has a rectangular outline corresponding to the adjacent storage element 10 (case 12) when viewed from the X-axis direction, and is connected to fix (connect) the first main body 211 to the holding member 3. Part 2111 and bus bar support part 2112 for supporting bus bar 5. In addition, the first main body 211 forms a ventilation path 215 that allows a cooling fluid (air in the example of the present embodiment) to pass between the power storage elements 10 adjacent in the X-axis direction. Specifically, in the first main body portion 211, a plurality of convex portions 216 that protrude toward the adjacent storage element 10 (in the X-axis direction) and extend in the Y-axis direction are arranged at intervals in the Z-axis direction. Thereby, the ventilation path 215 is formed between the 1st adjacent member 21 and the electrical storage element 10 because the front-end | tip (protrusion direction front-end | tip) of the convex part 216 contact | abuts the adjacent electrical storage element 10. FIG. Moreover, in the 1st adjacent member 21 of this embodiment, the dimension of the X-axis direction of the 1st main-body part 211 is the X-axis of the site | part corresponded to the 1st main-body part 211 in the 2nd adjacent member 22 and the 3rd adjacent member 23. Greater than direction dimension.

  The connecting portion 2111 is provided at the end of the first main body portion 211 in the Y-axis direction. The connecting portions 2111 of this embodiment are provided at both ends of the first main body portion 211 in the Y-axis direction. The connecting portion 2111 is a portion that is screwed in a state where the bolt B penetrates the holding member 3. In the power storage device 1, the first main body portion 211 (first adjacent member 21) and the holding member 3 are connected by screwing the bolt B into the connecting portion 2111. The connecting portion 2111 of this embodiment is configured by a nut embedded in the end portion of the first main body portion 211 in the Y-axis direction.

  As shown in FIGS. 5 and 6, the bus bar support portion 2112 is one end of the first main body portion 211 in the Z-axis direction (the side corresponding to the cover plate 121 of the power storage element 10 in the example of the present embodiment). Provided in the section. The bus bar support portion 2112 is a portion that partially protrudes from the end surface on the one side of the first main body portion 211. The bus bar support portion 2112 of the present embodiment is a rectangular parallelepiped portion provided at a position overlapping with the bus bar 5 that conducts the external terminals 13 of the power storage elements 10 arranged on both sides of the first adjacent member 21 in the Z-axis direction. . The bus bar support portion 2112 has grooves 2112A extending in the Z-axis direction at both ends in the Y-axis direction. The groove 2112 </ b> A comes into contact with a part of the bus bar 5 extending across the first adjacent member 21.

  The bus bar support portion 2112 includes a fixing portion 2113 that fixes the bus bar 5. The fixing portion 2113 is a female screw portion. Specifically, the fixing portion 2113 is a female screw portion that opens in the Z-axis direction on the end surface in the protruding direction of the bus bar support portion 2112. The fixing part 2113 of this embodiment is a nut.

  The first restricting portion 212 extends in the X-axis direction from the first main body portion 211, and includes the storage element 10 (specifically, the case 12) adjacent to the first main body portion 211 and the YZ plane (Y-axis and Z-axis). The relative movement in the YZ plane direction with respect to the first main body portion 211 of the electricity storage element 10 is regulated by abutting from the outside in the (plane) direction. The first restricting portion 212 extends in the X-axis direction from at least each corner portion of the first main body portion 211, and extends in the YZ plane direction at the corner portion of the electric storage element 10 (case 12) adjacent to the first main body portion 211. It has a surface (contact surface) that contacts from the outside.

  The shaft portion 213 extends outward from the end of the first main body portion 211 in the Y-axis direction and engages with the holding member 3. The shaft portion 213 of the present embodiment extends outward from both ends of the first main body portion 211 in the Y-axis direction. Specifically, the shaft portion 213 extends in a columnar shape in the Y-axis direction from an intermediate position in the Z-axis direction at the end portion in the Y-axis direction of the first main body portion 211, and a portion corresponding to the shaft portion 213 in the holding member 3. Is inserted into a through-hole 3112 provided in. The shaft portion 213 of the present embodiment is used for positioning the first adjacent member 21 with respect to the holding member 3 when the first adjacent member 21 is connected (fixed) to the holding member 3 at the time of manufacturing the power storage device 1 or the like. .

  As illustrated in FIGS. 1 and 2, the second adjacent member 22 is disposed between the power storage element 10 and the holding member 3 in the X-axis direction. Thereby, a predetermined interval (creeping distance or the like) is ensured between the storage element 10 and the holding member 3 arranged in the X-axis direction via the second adjacent member 22.

  Specifically, the second adjacent member 22 is adjacent to the power storage element 10 (case main body 120) between the power storage element 10 and the holding member 3 (hereinafter referred to as “second main body portion”) 221. And a restricting portion (hereinafter referred to as “second restricting portion”) 222 that restricts movement of the power storage element 10 adjacent to the second body portion 221 with respect to the second body portion 221.

  The second main body 221 has a rectangular outline corresponding to the adjacent storage element 10 (case 12) when viewed from the X-axis direction. In addition, the second main body portion 221 forms an air passage 225 that allows a cooling fluid (air in the example of the present embodiment) to pass between the power storage elements 10 adjacent in the X-axis direction. Specifically, in the second main body portion 221, a plurality of convex portions 226 that protrude toward the adjacent storage element 10 (in the X-axis direction) and extend in the Y-axis direction are arranged at intervals in the Z-axis direction. Thereby, the ventilation path 225 is formed between the 2nd adjacent member 22 and the electrical storage element 10 because the front-end | tip (protrusion direction front-end | tip) of the convex part 226 contact | abuts the adjacent electrical storage element 10. FIG.

  The second restricting part 222 extends in the X-axis direction from the second main body part 221, and comes into contact with the power storage element 10 (specifically, the case 12) adjacent to the second main body part 221 from the outside in the YZ plane direction. The relative movement of the power storage element 10 in the YZ plane direction with respect to the second main body portion 221 is restricted. The second restricting portion 222 extends in the X-axis direction from at least each corner portion of the second main body portion 221, and extends in the YZ plane direction at the corner portion of the electric storage element 10 (case 12) adjacent to the second main body portion 221. It has a surface (contact surface) that contacts from the outside.

  The third adjacent member 23 is arranged between the first adjacent member 21 and the second adjacent member 22 and between the power storage elements 10 adjacent in the X-axis direction. Accordingly, a predetermined interval (creeping distance or the like) is ensured between the power storage elements 10 arranged in the X-axis direction via the third adjacent member 23.

  Specifically, the third adjacent member 23 includes a main body part (hereinafter referred to as “third main body part”) 231 adjacent to the power storage element 10 (case main body 120) and a power storage element adjacent to the third main body part 231. 10, a restriction part (hereinafter referred to as “third restriction part”) 232 that restricts movement of the tenth main body part 231.

  The third main body 231 has a rectangular outline corresponding to the adjacent storage element 10 (case 12) when viewed from the X-axis direction. In addition, the first main body portion 211 forms a ventilation path 235 that allows a cooling fluid (air in the example of the present embodiment) to pass between the power storage elements 10 adjacent in the X-axis direction. Specifically, the third main body portion 231 has a rectangular corrugated cross-sectional shape. As a result, the third main body portion 231 comes into contact with the adjacent power storage element 10, so that the ventilation path 235 is formed between the third main body portion 231 and the power storage element 10.

  The third restricting portion 232 extends from the third body portion 231 in the X-axis direction, and comes into contact with the power storage element 10 (specifically, the case 12) adjacent to the third body portion 231 from the outside in the YZ plane direction. The relative movement of the power storage element 10 in the YZ plane direction with respect to the third main body portion 231 is restricted. The third restricting portion 232 extends in the X-axis direction from at least each corner portion of the third main body portion 231, and extends in the YZ plane direction at the corner portion of the power storage element 10 (case 12) adjacent to the third main body portion 231. It has a surface (contact surface) that contacts from the outside.

  The holding member 3 surrounds the periphery of the plurality of power storage elements 10 and the plurality of adjacent members 2, thereby holding the plurality of power storage elements 10 and the plurality of adjacent members 2 together. This holding member 3 is comprised by the member which has electroconductivity. Specifically, the holding member 3 includes a pair of termination members 30 disposed so that the plurality of power storage elements 10 are positioned therebetween in the X-axis direction, and a pair of the holding members 3 in a state facing the plurality of power storage elements 10 in the Y-axis direction. And an opposing member 31 that connects the terminal members 30 of each other. In the power storage device 1 of the present embodiment, the pair of termination members 30 are disposed in a state where the second adjacent member 22 is sandwiched between the pair of termination members 30 and the power storage element 10 disposed at the end in the X-axis direction. Are arranged on both sides in the Y-axis direction of the plurality of power storage elements 10 arranged in the X-axis direction.

  Each of the pair of termination members 30 extends in the YZ plane direction. Specifically, each of the pair of termination members 30 includes a main body 300 having a contour (rectangular contour in the present embodiment) corresponding to the power storage element 10, and a second main body portion 221 of the second adjacent member 22 from the main body 300. And a contact piece 301 that contacts the second adjacent member 22 and a support piece 302 to which the terminal block 7 is attached. The support piece 302 has a plate-like shape that extends in the X-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 (edges) constituting the outline of the main body 300. It is a part.

  Each of the pair of opposing members 31 includes a pair of beam portions 310 that extend in the X-axis direction and are spaced from each other in the Z-axis direction, and an intermediate position in the X-axis direction (in the example of this embodiment, the first adjacent member 31 A first connecting portion 311 for connecting the pair of beam portions 310 to each other at a position overlapping with the member 21 in the Y-axis direction, and a pair of second connecting portions 312 for connecting the ends of the pair of beam portions 310 to each other. . The facing member 31 of the present embodiment also includes a third connecting portion 313 that connects the pair of beam portions 310 between the first connecting portion 311 and the second connecting portion 312.

  Each of the pair of beam portions 310 extends along corners of the plurality of power storage elements 10 (cases 12) arranged in the X-axis direction. The first connecting portion 311 extends in the Z-axis direction, and through holes 3111 and 3112 are formed at positions corresponding to the connecting portion 2111 and the shaft portion 213 of the first adjacent member 21 (specifically, positions overlapping in the Y-axis direction). Have. A bolt B is inserted into the through hole 3111, and the bolt B is screwed into the connecting portion 2111 of the first adjacent member 21. Thereby, the opposing member 31 and the 1st adjacent member 21 are connected. Further, the shaft portion 213 of the first adjacent member 21 is inserted into the through hole 3112. The second connecting portion 312 extends in the Z-axis direction and is connected to the termination member 30. Thereby, the termination member 30 and the opposing member 31 are connected (coupled). The third connecting portion 313 extends in the Z-axis direction at a position overlapping the power storage element 10 in the Y-axis direction.

  The insulator 4 has an insulating property. The insulator 4 is disposed between the facing member 31 and the plurality of power storage elements 10 arranged in the X-axis direction. Specifically, the insulator 4 covers a region of the holding member 3 that faces at least the plurality of power storage elements 10. Thereby, the insulator 4 insulates between the opposing member 31 and the some electrical storage element 10 located in a line with the X-axis direction.

  The bus bar 5 is configured by a plate-like member having conductivity such as metal. The bus bar 5 includes a plurality of types of bus bars. The bus bar 5 of the present embodiment includes an intermediate bus bar 50 that connects the external terminals 13 of the power storage element 10 to each other, and an end bus bar 53 that connects the external terminal 13 of the power storage element 10 and the total terminal 71 of the power storage device 1. Including.

  A plurality of intermediate bus bars 50 are provided in the power storage device 1 (the number corresponding to the plurality of power storage elements 10). The plurality of intermediate bus bars 50 connect (conduct) all of the plurality of power storage elements 10 included in the power storage device 1 in series. The plurality of intermediate bus bars 50 electrically connect the external terminals 13 of the adjacent power storage elements 10 via the first adjacent member 21 (that is, connect across the first adjacent member 21), And a second bus bar 52 that electrically connects the external terminals 13 of the power storage elements 10 adjacent to each other through the third adjacent member 23 (that is, connects across the third adjacent member 23). The power storage device 1 of the present embodiment includes one first bus bar 51, a plurality of second bus bars 52, and a pair of end bus bars 53.

  As shown in FIGS. 5 and 6, first bus bar 51 is external to a predetermined power storage element 10 (hereinafter sometimes referred to as “first power storage element 10 </ b> A”) among a plurality of power storage elements 10. The terminal 13 is electrically connected to the external terminal 13 of another power storage element 10 (hereinafter also referred to as “second power storage element 10B”) among the plurality of power storage elements 10. In the example of the present embodiment, the first power storage element 10A is a power storage element adjacent to the first adjacent member 21 on one side (left side in FIG. 5) in the X-axis direction, and the second power storage element 10B is X The power storage element is adjacent to the first adjacent member 21 on the other axial side (the right side in FIG. 5). That is, the first bus bar 51 connects the external terminals 13 of the adjacent power storage elements 10 </ b> A and 10 </ b> B through the first adjacent member 21. This first bus bar 51 has a first power storage element so as to straddle the first adjacent member 21 in a state of being spaced from the first adjacent member 21 (that is, in a non-contact state with the first adjacent member 21). The external terminal 13 of 10A and the external terminal 13 of the 2nd electrical storage element 10B are connected. In addition, the specific number of 10 A of 1st electrical storage elements and the 2nd electrical storage element 10B which the 1st bus bar 51 conduct | electrically_connects (connects) is not limited.

  First bus bar 51 includes at least first member 55 connected to external terminal 13 of first power storage element 10A and second member 56 connected to external terminal 13 of second power storage element 10B. . The first member 55 and the second member 56 are directly or indirectly connected to form a conduction path, and the conduction path is configured to be separated or divided in the middle. In the first bus bar 51 of the present embodiment, the first member 55 and the second member 56 are used to connect the external terminal 13 of the first power storage element 10A and the external terminal 13 of the second power storage element 10B. Form. The first bus bar 51 of the present embodiment includes a first member 55 and a second member 56 that partially overlaps the first member 55. The first bus bar 51 of the present embodiment also includes a third member 57 that overlaps the first member 55 and the second member 56.

  The first member 55 includes a first connection portion 551 connected to the external terminal 13 of the first power storage element 10 </ b> A, and a first extension portion 552 extending from the first connection portion 551. The first member 55 of the present embodiment is connected to the positive external terminal 13 of the first power storage element 10A, and is formed by bending a rectangular plate-like member.

  The first connection portion 551 is a portion that is rectangular when viewed in the Z-axis direction and spreads in the XY plane (a plane that includes the X-axis and the Y-axis). The first connection portion 551 has a through hole 551A in the center. The first connection portion 551 of the present embodiment is connected to the external terminal 13 by being welded along the periphery of the through hole 551A.

  The first extending portion 552 includes a first conductive portion (first conductive portion) 553 that is electrically connected to the second member 56, a first bypass portion 554 that is provided closer to the first connecting portion 551 than the first conductive portion 553, Have

  The first conduction portion 553 has a first conduction surface 553A that intersects the Z-axis direction. That is, the first conduction portion 553 is a portion including the first conduction surface 553A in the first extension portion 552. The first conductive portion 553 overlaps with the bus bar support portion 2112 of the first adjacent member 21 in the Z-axis direction. The first conductive portion 553 of the present embodiment is a portion having a rectangular shape as viewed in the Z-axis direction extending in the XY plane direction, and is centered (specifically, in the Z-axis direction at the end surface in the protruding direction of the bus bar support portion 2112). A through-hole 553B is provided in the opening of the female screw portion (fixed portion 2113) and a position overlapping with the Z-axis direction). Further, the first conduction surface 553A of the present embodiment is a plane that is orthogonal to the Z-axis direction (that is, spreads in the XY plane direction toward the second member 56).

  The first bypass unit 554 connects the first connection unit 551 and the first conduction unit 553. In other words, the first bypass portion 554 is disposed at a position closer to the first connection portion 551 than the first conduction portion 553 in the first extension portion 552. The first detour portion 554 is a bent portion. Specifically, as shown in FIG. 7, the first detour portion 554 extends so that the entire portion from the first connection portion 551 to the first conduction portion 553 or a part thereof detours when viewed from the Y-axis direction. ing. The first detour portion 554 of the present embodiment has a first standing portion 5541 rising from the end of the first connection portion 551 (extending in the Z-axis direction), and the first standing portion 5541 and the first standing portion 5541 spaced apart in the X-axis direction. A second upright portion 5542 rising from the end of the conducting portion 553 (extending in the Z-axis direction), a tip of the first upright portion 5541, and a front end of the second upright portion 5542 are connected, and an arc-shaped curve is seen from the Y-axis direction. Part 5543.

  The second member 56 includes a second connection portion 561 connected to the external terminal 13 of the second power storage element 10 </ b> B, and a second extending portion 562 extending from the second connection portion 561. The second member 56 of the present embodiment is connected to the negative external terminal 13 of the second power storage element 10 </ b> B, and is formed by bending a rectangular plate-like member like the first member 55. .

  The second connection portion 561 is a portion that is rectangular when viewed in the Z-axis direction and spreads in the XY plane direction. The second connection portion 561 has a through hole 561A in the center. The through hole 561A of the second connection portion 561 is larger than the through hole 551A of the first connection portion 551. The second connection portion 561 of the present embodiment is connected to the external terminal 13 by being welded along the periphery of the through hole 561A.

  The second extending portion 562 includes a second conducting portion (second conducting portion) 563 that conducts with the first member 55 (specifically, the first conducting portion 553), and the second connecting portion 563 side from the second conducting portion 563. 2nd detour part (detour part) 564 provided in.

  The second conduction portion 563 has a second conduction surface 563A that is detachably overlapped with the first conduction surface 553A in a state of facing the first conduction surface 553A (see FIG. 6). That is, the second conducting portion 563 is a portion including the second conducting surface 563A in the second extending portion 562. The second conducting portion 563 of the present embodiment is a portion that is rectangular when viewed in the Z-axis direction and extends in the XY plane direction, and overlaps the first conducting portion 553 in the Z-axis direction. The second conducting portion 563 has the same or substantially the same size as the first conducting portion 553, and extends in the Z-axis direction from the through hole 553B of the first conducting portion 553 and the internal thread portion (fixed portion 2113) of the bus bar support portion 2112. A through hole 563B is provided at the overlapping position. The through hole 563B has the same or substantially the same size as the through hole 553B, and is slightly larger than the female screw portion (fixed portion 2113) of the bus bar support portion 2112. In addition, the second conduction surface 563A of the present embodiment is a plane that is orthogonal to the Z-axis direction.

  The second bypass unit 564 connects the second connection unit 561 and the second conduction unit 563. In other words, the second bypass portion 564 is disposed at a position closer to the second connection portion 561 than the second conduction portion 563 in the second extension portion 562. The second detour portion 564 is a bent portion. Specifically, the second detour portion 564 extends so that the entire portion from the second connection portion 561 to the second conduction portion 563 or a part thereof detours when viewed from the Y-axis direction. The second detour portion 564 of the present embodiment rises from the end of the second connection portion 561 (extends in the Z-axis direction), the first upright portion 5641, and the first upright portion 5641 and the second upright portion with an interval in the X-axis direction. A second upright portion 5642 rising from the end of the conducting portion 563 (extending in the Z-axis direction), a tip of the first upright portion 5541, and a front end of the second upright portion 5642 are connected, and an arc-shaped curve is seen from the Y-axis direction. Part 5643.

  When the first member 55 and the second member 56 configured as described above are inserted an insulating plate (insulating member) 8 (see FIG. 11) described later between the first conducting surface 553A and the second conducting surface 563A. And a guide portion for guiding the insulating plate 8. The guide part of this embodiment includes a first guide part 555 included in the first extension part 552 and a second guide part 565 included in the second extension part 562.

  The first guide portion 555 extends from the edge of the first conduction surface 553A, and the second guide portion 565 extends from a position corresponding to the first guide portion 555 at the edge of the second conduction surface 563A. The distance between the first guide part 555 and the second guide part 565 (in the example of this embodiment, the distance in the Z-axis direction) increases as the distance from the first conductive surface 553A and the second conductive surface 563A increases.

  In the first bus bar 51 of the present embodiment, the first guide portion 555 is configured by a pair of protruding pieces 555A that protrude from the outer edge of the first conducting portion 553 in the Y-axis direction, and the second guide portion 565 is The second conducting portion 563 is constituted by a pair of projecting pieces 565A that project from the outer edge in the Y-axis direction. The pair of projecting pieces 555A and 565A project at an interval in the X-axis direction. The corresponding protruding piece 555A of the first guide portion 555 and the protruding piece 565A of the second guide portion 565 (in the example of this embodiment, the position overlapping in the Z-axis direction) are the first conductive surface 553A or the second conductive surface. Opposing surfaces 555B and 565B that extend from 563A and curve so that the distance between the first conducting surface 553A and the second conducting surface 563A increases as they move away from each other.

  The third member 57 is overlapped with the first extending portion 552 and the second extending portion 562 from the side opposite to the first adjacent member 21. The third member 57 includes a third member main body 571 that overlaps the first conductive portion 553 and the second conductive portion 563, and a contact portion 572 that extends from the third member main body 571 and contacts the first adjacent member 21. .

  The third member main body 571 is a plate-like portion that extends in the XY plane direction, and has a rectangular outline that is substantially the same as the first conductive portion 553 and the second conductive portion 563. In the Z-axis direction, the third member main body 571 overlaps with the female threaded portion (fixed portion 2113) of the bus bar support portion 2112, the through hole 553B of the first conductive portion 553, and the through hole 563B of the second conductive portion 563. It has a through hole 571A. This through hole 571A is the same or substantially the same size as the through holes 553B and 563B, and is slightly larger than the screw hole of the female screw portion (fixed portion 2113) of the bus bar support portion 2112.

  The contact portion 572 is a rotation direction (a female screw portion is a screw portion such as a bolt (in the example of the present embodiment, the male screw of the mounting member 6) with the central axis of the female screw portion (fixed portion 2113) of the bus bar support portion 2112 as a rotation center. The first adjacent member 21 (in the example of this embodiment, the inner surface of the groove 2112A of the bus bar support portion 2112) in the rotation direction of the screw portion when the portion 61) is screwed. Specifically, the contact portion 572 extends along the groove 2112A (downward in FIG. 5) from a position corresponding to the groove 2112A of the bus bar support portion 2112 in the third member main body 571. The cross-sectional shape along the XY plane of the contact portion 572 corresponds to the cross-sectional shape of the groove 2112A. The contact portion 572 of the present embodiment extends from both ends of the third member main body 571 in the Y-axis direction. That is, the third member 57 has a pair of contact portions 572.

  As shown in FIGS. 1, 2, and 8, the second bus bar 52 has a substantially rectangular plate shape extending in the X-axis direction (specifically, extending in the XY plane direction), and has both ends in the X-axis direction. The part has two through holes 52A. The sizes of these two through holes 52A are different. In the power storage device 1 of the present embodiment, the portion (end portion) where the large through hole 52A of the second bus bar 52 is provided is connected to the negative external terminal 13 and the portion (end portion) where the small through hole 52A is provided. ) Is connected to the external terminal 13 of the positive electrode.

  Each of the pair of end bus bars 53 includes one terminal block 7 (total terminal 71) and one of a plurality of power storage elements 10 connected in series, as shown in FIG. 1, FIG. 2, and FIG. A plurality of power storage elements 10 connected in series with the other terminal block 7 (total terminal 71) are made conductive with the external terminal 13 of the power storage element 10 disposed at the end on the pole (for example, positive electrode) side. Is electrically connected to the external terminal 13 of the electricity storage element 10 disposed at the end of the other electrode (for example, the negative electrode).

  The end bus bar 53 of the present embodiment is a plate-like member that extends in the X-axis direction, and has a bent portion at an intermediate position in the X-axis direction. Specifically, the end bus bar 53 includes a third detour portion 531 that extends so as to detour when viewed from the Y-axis direction. More specifically, the end bus bar 53 includes a third connection portion 533 connected to the terminal block 7, a fourth connection portion 534 connected to the external terminal 13 of the power storage element 10, a third connection portion 533, And a third bypass unit 531 that connects the four connection units 534. The third connection portion 533 and the fourth connection portion 534 are rectangular plate-shaped portions that spread in the XY plane direction. The third connection portion 533 has a through hole 533A, and the fourth connection portion 534 has a through hole 534A. The sizes of the through holes 533A and 534A are different. The configuration of the third bypass unit 531 of the present embodiment is the same as the first bypass unit 554 and the second bypass unit 564 of the first bus bar 51. That is, the third detour portion 531 rises from the end of the third connection portion 533 (extends in the Z-axis direction), and the fourth connection portion is spaced from the third stand-up portion 5311 in the X-axis direction. A fourth standing part 5312 rising from the end of 534 (extending in the Z-axis direction), a curved part 5313 connecting the tip of the third standing part 5311 and the tip of the fourth standing part 5312 and having an arc shape in the Y-axis direction; Have.

  The attachment member 6 is detachably attached to the first adjacent member 21. Specifically, as illustrated in FIGS. 5 and 6, the attachment member 6 includes a first extending portion 552, a second extending portion 562, and a third member main body 571 that overlap in the Z-axis direction. It has a male screw portion 61 that is screwed into a fixing portion (female screw portion) 2113 of the first adjacent member 21 while penetrating from the third member 57 side.

  The mounting member 6 of the present embodiment is a bolt, and has a male screw part 61 extending in the Z-axis direction and a head provided at the end of the male screw part 61 and having a larger size in the XY plane direction than the male screw part 61. 62. Then, the male screw portion 61 is screwed into the fixing portion 2113 of the bus bar support portion 2112 in a state where the male screw portion 61 is inserted through the through hole 571A of the third member main body 571, the through hole 563B of the second conduction portion 563, and the through hole 553B of the first conduction portion 553. As a result, the head 62 presses the third member main body 571, the second conduction portion 563, and the first conduction portion 553 toward the bus bar support portion 2112.

  As shown in FIGS. 1, 2, and 10, the terminal block 7 is attached to the external device, another power storage device 1, and the like and the holding member 3 to support the total terminal 71. A base portion 72. The terminal block 7 of the present embodiment also includes a terminal cover 73 that covers the total terminals 71 in order to prevent the total terminals 71 from coming into contact with people, other members, and the like when the power storage device 1 is not used. The total terminal 71 of the present embodiment includes a plate-like member 711 to which the end bus bar 53 (specifically, the third connection portion 533) is connected (fixed) and a screw member 712 used to fix a terminal of an external device or the like. And having.

  The plate-like member 711 has conductivity. The plate-like member 711 of this embodiment is an L-shaped member as viewed from the Y-axis direction, that is, a plate-like member bent at an intermediate position. Specifically, the plate-like member 711 includes a first part 7111 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 72, and a first part A second portion 7112 extending from 7111 in a direction intersecting the predetermined direction (Z-axis direction in the example of this embodiment).

  The screw member 712 protrudes from the plate-like member 711 (in the example of the present embodiment, the second portion 7112). Specifically, the screw member 712 includes a male screw portion 7121 that extends from the second portion 7112 in the X-axis direction, and a head portion 7122 that extends in the YZ plane direction at one end of the male screw portion 7121.

  The base portion 72 is fixed to the terminal member 30 and supports the plate member 711 on the side where the terminal member 30 is located with respect to the plate member 711. The base portion 72 has a pair of side wall portions 721 that face each other such that a male screw portion 7121 (screw member 712) that penetrates the second portion 7112 of the plate-like member 711 is located therebetween. A terminal cover 73 is attached to an end portion (upper end portion in FIG. 10) of the pair of side wall portions 721 so as to be rotatable about a predetermined axis C extending in the Y-axis direction. In a state where the terminal cover 73 is closed (a state where the terminal cover 73 is stretched between the edges of the pair of side wall portions 721), the total terminals 71 (specifically, the plate-like member 711) are formed by the pair of side wall portions 721 and the terminal cover 73. The second portion 7112 and the screw member 712) are enclosed. On the other hand, in a state in which the terminal cover 73 is open (a state in which the terminal cover 73 is rotated about the predetermined axis C: see the two-dot chain line in FIGS. 2 and 10), the tip end side of the screw member 712) is in an open state. .

  In the power storage device 1 configured as described above, when the input / output of electricity is unnecessary, such as during transportation or maintenance of a device or the like on which the power storage device 1 is mounted, the input / output of electricity from the total terminal 71 is performed. Insulating plate (insulating member) is attached so that it is not possible.

  The insulating plate is insulative and has a shape that can be inserted between conductive surfaces between the first conductive surface 553A of the first conductive portion 553 and the second conductive surface 563A of the second conductive portion 563. As shown in FIG. 11, the insulating plate 8 of this embodiment is a plate-shaped member.

  As shown in FIG. 12, the insulating plate 8 includes the first conducting surface 553 </ b> A of the first member 55 and the second conducting surface 563 </ b> A of the second member 56 with the attachment member 6 and the third member 57 removed. Between. As a result, the electrical path connecting the pair of total terminals 71 is blocked at the position of the first bus bar 51, so that the power storage device 1 is in a state where electricity cannot be input / output from the pair of total terminals 71.

  On the other hand, when the power storage device 1 is used, the insulating plate 8 is pulled out from between the first conductive surface 553A and the second conductive surface 563A, and the third member 57 is the first conductive portion 553 and the second conductive portion 563. The male threaded portion 61 of the attachment member 6 is screwed into the fixing portion 2113 of the bus bar support portion 2112 in a state of being overlaid on (see FIG. 5). Thereby, the first member 55 and the second member 56 are brought into conduction, and the power storage device 1 is in a state where electricity can be input and output from the pair of total terminals 71.

  According to the power storage device 1 described above, the first member 55 and the second member 56 are respectively connected to the corresponding external terminals 13 (in the example of this embodiment, welded), but the first conduction surface 553A and the first member 55 are connected to each other. Since the two conducting surfaces 563A are in a state of being separated from each other, the first conducting surface 553A and the second conducting surface 563A can be separated from each other to make the power storage device 1 unable to input and output electricity. it can.

  In the power storage device 1 of the present embodiment, each of the first conduction surface 553A and the second conduction surface 563A is a plane orthogonal to the Z-axis direction (including the X-axis). For this reason, even if a manufacturing error or the like occurs in the interval (interval in the X-axis direction) between the power storage elements 10 to which the external terminals 13 are connected by the first bus bar 51, the first conductive surface 553A and the second conductive surface 563A are Relative movement in the X-axis direction is possible with surface contact. For this reason, even if the manufacturing error or the like occurs, the first conductive surface 553A and the second conductive surface 553A and the second conductive surface 553A and the second conductive surface 563A and the second conductive surface 563A do not generate stress due to surface contact. The conduction surface 563A can be reliably conducted (surface contact).

  Further, in the power storage device 1 of the present embodiment, the first member 55 has a first bypass portion (bent portion) 554, and the second member 56 has a second bypass portion (bent portion) 564. ing. For this reason, even if the space | interval of the X-axis direction of the electrical storage element 10 to which the external terminals 13 are connected by the 1st bus bar 51 changes, the 1st detouring part 554 and the 2nd detouring part 564 expand or narrow (in detail, The curved portions 5543 and 5634 expand and contract (the curvature of the curved portions 5543 and 5634 decreases or increases), and the first upright portions 5541 and 5641 and the second upright portions 5542 and 5642 expand or narrow). Thereby, the stress resulting from the change in the interval is concentrated on the portion (the first connection portion 551, the second connection portion 561 and the periphery thereof) connected to the external terminal 13 in the first member 55 and the second member 56. It is suppressed to do. Thereby, in the 1st member 55 and the 2nd member 56, the damage resulting from the change of the said space | interval is prevented.

  Moreover, in the electrical storage apparatus 1 of this embodiment, the attachment member 6 presses the 1st conduction | electrical_connection part 553 and the 2nd conduction | electrical_connection part 563 to the 1st adjacent member 21 (in the example of this embodiment, the bus bar support part 2112). doing. For this reason, even if the 1st conduction surface 553A and the 2nd conduction surface 563A are pressed mutually, and vibration etc. are added to the electrical storage apparatus 1, the conduction state of the 1st conduction part 553 and the 2nd conduction part 563 is carried out. It is reliably maintained.

  In the power storage device 1 of the present embodiment, the third member 57 that sandwiches the first member 55 and the second member 56 between the first adjacent member 21 is the first adjacent member in the rotation direction of the external thread portion 61 of the mounting member 6. 21 (specifically, a contact portion 572 that contacts the inner surface of the groove 2112A of the bus bar support portion 2112). For this reason, it is possible to prevent the torque when the male screw portion 61 is screwed into the fixing portion (female screw portion) 2113 of the bus bar support portion 2112 from being transmitted to the first member 55 and the second member 56 by the third member 57. Thereby, it can prevent that the stress resulting from the said torque is added to the 1st connection part 551 and the 2nd connection part 561 which are connected to the external terminal 13. FIG.

  Further, in the power storage device 1 of the present embodiment, the external thread portion 61 of the mounting member 6 passes through the first conducting portion 553, the second conducting portion 563, and the third member 57 (specifically, the third member main body 571). ing. For this reason, the 1st conduction | electrical_connection part 553 and the 2nd conduction | electrical_connection part 563 which overlap with the 1st conduction | electrical_connection surface 553A and the 2nd conduction | electrical_connection surface 563A in the surface contact state are the 1st adjacent member 21 and the 3rd member 57 by the attachment member 6. Tightened between. Thereby, the 1st conduction | electrical_connection part 553 (1st conduction | electrical_connection surface 553A) and the 2nd conduction | electrical_connection part 563 (2nd conduction | electrical_connection surface 563A) adhere more firmly.

  Moreover, in the electrical storage apparatus 1 of this embodiment, the insulating plate 8 inserted so that extraction is possible between 1st conduction surface 553A and 2nd conduction surface 563A is used. By switching the insulating plate 8 between the first conductive surface 553A and the second conductive surface 563A or pulling it out, the power storage device 1 switches between a state where electricity can be input / output from the total terminal 71 and a state where electricity cannot be input / output. Can do. That is, when the insulating plate 8 is inserted between the first conduction surface 553A and the second conduction surface 563A, the conduction between the first conduction portion 553 and the second conduction portion 563 is interrupted and the power storage device 1 Will not be able to input or output electricity. On the other hand, when the insulating plate 8 is pulled out, the first conducting portion 553 and the second conducting portion 563 are conducted (the first conducting surface 553A and the second conducting surface 563A are in surface contact), and the power storage device 1 Will be able to input and output electricity.

  Moreover, in the electrical storage apparatus 1 of this embodiment, in the 1st bus bar 51, the space | interval of the 1st guide part 555 and the 2nd guide part 565 becomes large as it leaves | separates from the 1st conduction surface 553A and the 2nd conduction surface 563A. In other words, the distance between the first guide portion 555 and the second guide portion 565 decreases as the position approaches the position where the first conductive surface 553A and the second conductive surface 563A overlap. For this reason, when the insulating plate 8 is inserted between the first conductive surface 553A and the second conductive surface 563A, the insulating plate 8 is guided to the first guide portion 555 and the second guide portion 565, thereby It becomes easy to insert the insulating plate 8 between the first conductive surface 553A and the second conductive surface 563A.

  It should be noted that the power storage device and the insulating member of the present invention are 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 power storage device 1 of the above embodiment, the first member 55 and the second member 56 of the first bus bar 51 are brought into contact with and separated from each other to switch between a state where electricity can be input / output from the total terminal 71 and a state where electricity cannot be input / output. It is not limited to the configuration. For example, the power storage device 1 may have a configuration in which the end bus bar 53 includes a plurality of members and switches between a state in which electricity can be input / output from the total terminal 71 and a state in which electricity cannot be input / output by the contact and separation of these members.

  Specifically, as shown in FIGS. 13 and 14, the end bus bar 53 </ b> A includes a first connection portion 911 connected to the external terminal 13 and a first extension portion 912 extending from the first connection portion 911. And a second member 92 having a second connecting portion 921 connected to the total terminal 71 and a second extending portion 922 extending from the second connecting portion 921. The first extending portion 912 has a first conducting surface 913A that intersects the Z-axis direction, and the second extending portion 922 faces the first conducting surface 913A while facing the first conducting surface 913A. It has the 2nd conduction surface 922A piled up so that separation is possible. More details are as follows.

  The base portion 72 of the terminal block 7 has a bus bar support portion 722 that protrudes from the end surface on the end bus bar 53 side in the Z-axis direction.

  The bus bar support portion 722 is a rectangular parallelepiped-shaped portion provided at a position overlapping the end bus bar 53 that connects the total terminal 71 and the external terminal 13 of the power storage device 10 in the Z-axis direction. The bus bar support portion 722 includes a fixing portion 723 that fixes the end bus bar 53. The fixing portion 723 of this embodiment is a female screw portion. Specifically, the fixing portion 723 is a female screw portion that opens in the Z-axis direction on the end surface of the bus bar support portion 722 in the protruding direction. The fixing portion 723 of this embodiment is a nut.

  The end bus bar 53 </ b> A includes a first member 91 connected to the external terminal 13 of the electricity storage device 10 adjacent to the termination member 30, and a second member 92 connected to the total terminal 71 and partially overlapping the first member 91. And having. The end bus bar 53 </ b> A also includes a third member 93 that overlaps the first member 91 and the second member 92.

  The first member 91 is a rectangular plate-shaped member that extends in the XY plane direction. The dimension of the first member 91 in the Y-axis direction corresponds to the dimension of the bus bar support portion 722 in the Y-axis direction. The first member 91 has a first connection portion 911 connected to the external terminal 13 of the power storage element 10 and a first extending portion 912 extending from the first connection portion 911.

  The first connection portion 911 has a through hole 911A. The first connection portion 911 is connected to the external terminal 13 by being welded along the periphery of the through hole 911A.

  The first extending portion 912 includes a first conductive portion 913 that is electrically connected to the second member 92, and a third bypass portion (a bypass portion) 914 that is provided closer to the first connection portion 911 than the first conductive portion 913. .

  The first conduction portion 913 has a first conduction surface 913A that intersects the Z-axis direction. That is, the first conduction part 913 is a part including the first conduction surface 913A in the first extension part 912. The first conductive portion 913 overlaps with the bus bar support portion 722 of the termination member 30 in the Z-axis direction. The first conducting portion 913 of the present embodiment has a through hole 913 </ b> B at a position overlapping with the female screw portion (fixed portion 723) opening in the Z-axis direction on the end surface in the protruding direction of the bus bar support portion 722. The first conductive surface 913A is a plane that is orthogonal to the Z-axis direction (that is, spreads in the XY plane direction toward the second member 92).

  The third bypass unit 914 connects the first connection unit 911 and the first conduction unit 913. In other words, the third bypass portion 914 is disposed at a position closer to the first connection portion 911 than the first conduction portion 913 in the first extension portion 912. The third detour part 914 is a bent part. Specifically, the third detouring portion 914 extends so that the entire portion from the first connecting portion 911 to the first conducting portion 913 or a part thereof detours when viewed from the X-axis direction. The third bypass unit 914 has the same configuration as the third bypass unit 531 of the end bus bar 53 in the above embodiment. That is, the third detour portion 914 rises from the end of the first connection portion 911 (extends in the Z-axis direction), the third standing portion 9141, and the third standing portion 9141 spaced from the first standing portion 9141 in the X-axis direction. The fourth upright portion 9142 rising from the end of 913 (extending in the Z-axis direction), the tip of the third upright portion 9141 and the tip of the fourth upright portion 9142 are connected, and an arcuate curved portion 9143 is seen from the Y-axis direction. And having.

  The second member 92 is a rectangular plate-like member, and includes a second connection portion 921 connected to the total terminal 71 and a second extending portion 922 extending from the second connection portion 921. The dimension of the second member 92 in the Y-axis direction corresponds to the dimension of the bus bar support portion 722 in the Y-axis direction. The second member 92 is connected to the total terminal 71 by being formed integrally with the total terminal 71.

  The second extending portion 922 has a second conductive surface 922A that is detachably overlapped with the first conductive surface 913A in a state of facing the first conductive surface 913A. The second extending portion 922 of this embodiment overlaps the first conducting portion 913 in the Z-axis direction. The second extending portion 922 has a through hole 922B at a position overlapping with the through hole 913B of the first conduction portion 913 and the female screw portion (fixing portion 723) of the bus bar support portion 722 in the Z-axis direction. The through hole 922B has the same or substantially the same size as the through hole 913B, and is slightly larger than the female screw portion (fixed portion 723) of the bus bar support portion 722. The second conduction surface 922A is a plane orthogonal to the Z-axis direction.

  When the first member 91 and the second member 92 configured as described above are inserted with the insulating plate (insulating member) 8 (see FIG. 11) between the first conductive surface 913A and the second conductive surface 922A, A guide portion for guiding the insulating plate 8 is provided. The guide part includes a first guide part 915 included in the first extension part 912 and a second guide part 925 included in the second extension part 922.

  The first guide portion 915 extends from the edge of the first conduction surface 913A, and the second guide portion 925 extends from a position corresponding to the first guide portion 915 at the edge of the second conduction surface 922A. The distance between the first guide portion 915 and the second guide portion 925 increases as the distance from the first conductive surface 913A and the second conductive surface 922A increases.

  The third member 93 is overlapped with the first extending portion 912 and the second extending portion 922 from the side opposite to the base portion 72. The third member 93 includes a third member main body 931 that overlaps the first conducting portion 913 and the second extending portion 922, and a base portion 72 that extends from the third member main body 931 and is fixed to the terminal member 30. An abutting portion 932 in contact therewith.

  The third member main body 931 is a plate-shaped part that spreads in the XY plane direction. The dimension in the Y-axis direction of the third member main body 931 corresponds to the dimension in the Y-axis direction of the first conducting portion 913 and the second extending portion 922. In the Z-axis direction, the third member main body 931 is positioned so as to overlap with the female thread portion (fixed portion 723) of the bus bar support portion 722, the through hole 913B of the first conduction portion 913, and the through hole 922B of the second extension portion 922. And a through hole 931A. The through-hole 931A is the same or substantially the same size as the through-holes 913B and 922B, and is slightly larger than the screw hole of the female screw portion (fixed portion 723) of the bus bar support portion 722.

  The contact portion 932 is a base portion 72 (in the example shown in FIGS. 13 and 14, Y of the bus bar support portion 722) in the rotation direction with the central axis of the female screw portion (fixed portion 723) of the bus bar support portion 722 as the rotation center. (Side surface in the axial direction). Specifically, the contact portion 932 extends along the side surface (downward in FIG. 13) from a position corresponding to the side surface of the bus bar support portion 722 in the third member main body 931. The contact portions 932 extend from both ends of the third member main body 931 in the Y-axis direction.

  The plate-like member 711 of the total terminal 71 is integrally formed with the second member 92 as described above. That is, in a rectangular plate member that is bent at an intermediate position when viewed from the Y-axis direction, a portion that extends in the XY plane direction constitutes the second member 92, and a portion that extends in the YZ plane direction is the plate-like member 711. Configure.

  Even with the above configuration, the first member 91 is connected to the external terminal 13 and the second member 92 is connected to the total terminal 71, but the first conduction surface 913A and the second conduction surface 922A can be separated from each other. Since they are in an overlapped state, the power storage device 1 can be brought into a state where electricity cannot be input / output by separating the first conductive surface 913A and the second conductive surface 922A. Various effects obtained in the power storage device 1 of the above-described embodiment can also be obtained from the power storage device having this configuration (the power storage device in which the end bus bar 53 is composed of a plurality of members). Moreover, also in the terminal block 7 of this electrical storage apparatus 1, by removing the attachment member 6 and the third member 93, the insulating plate 8 is detachably inserted between the first conductive surface 913A and the second conductive surface 922A. Can do.

  Moreover, although the 1st bus bar 51 of the said embodiment is comprised by two members, the 1st member 55 and the 2nd member 56, it is not limited to this structure. For example, as shown in FIG. 15, the first bus bar 51 has a conduction path α that allows the external terminals 13 of different power storage elements 10 to conduct with each other by three or more members including the first member 55 and the second member 56. It may be formed. Specifically, the 1st bus bar 51 may have the 1st member 55, the 2nd member 56, and the connection member 58 which connects the 1st member 55 and the 2nd member 56 so that conduction is possible. . In the example shown in FIG. 15, the connection member 58 is a rectangular plate-like conductive member that is long in the first direction. The connecting member 58 includes a first conducting portion 553 of the first member 55 and a second member 56 of the second member 56 between both ends in the longitudinal direction (first direction) of the connecting member 58 and the first adjacent member 21. It fixes to the 1st adjacent member 21 with fastening members (or fixing members) 59, such as a volt | bolt, so that the conduction | electrical_connection part 563 may be inserted | pinched. In the example shown in FIG. 15, a region (part) where the first conducting portion 533 and the second conducting portion 563 do not exist between the connecting member 58 and the first adjacent member 21 in the connecting member 58 is a fastening member. 59, as shown in FIG. 16, in the connection member 58, the region where the connection member 58 and the first conduction portion 553 overlap, and the region where the connection member 58 and the second conduction portion 563 overlap. A configuration in which the fastening member 59 penetrates each of them may be used.

  In the example shown in FIGS. 15 and 16, the connecting member 58 and the first member 55 and the connecting member 58 and the second member 56 are electrically connected to each other by overlapping in the thickness direction. Not. As shown in FIG. 17, the end of the connection member 58 and the end of the first member 55, and the end of the connection member 58 and the end of the second member 56 come into contact with each other (so-called butting). You may conduct. In other words, the connection member 58, the first member 55, and the second member 56 only need to be in contact with each other so as to be conductive.

  In addition, the power storage device 1 has, for example, a configuration in which the connection member 58 is eliminated in the configuration of FIG. 17, that is, an end portion of the first member 55 and an end portion of the second member 56 by a conductive member such as the fastening member 59. May be fixed to the first adjacent member 21 and the first member 55 and the second member 56 may be electrically connected by the conductive member.

  In the example illustrated in FIGS. 15 to 17, the connection member 58 is a single member, but may be configured by a plurality of members (members having conductivity).

  In the power storage device 1 of the above embodiment, the first bus bar 51 includes the first bypass unit 554 and the second bypass unit 564, but is not limited to this configuration. The first bus bar 51 may have a configuration without a detour portion, or may have only one of the first detour portion 554 and the second detour portion 564.

  Moreover, the specific structure of the detour part provided in the bus bar 5 is not limited. The first to third bypass portions 554, 564, and 531 of the above-described embodiment extend in a detour so as to protrude in the Z-axis direction when viewed from the Y-axis direction. For example, as illustrated in FIG. The structure etc. which detour and extend so that it may protrude in an axial direction may be sufficient. Further, the detour portion may be configured to detour and extend so as to protrude a plurality of times. That is, the detour portion includes one or a plurality of bent portions, a curved portion, and the like, so that when the interval in the X-axis direction of the power storage elements 10 connected by the bus bar 5 is changed, this change is absorbed and the bus bar 5 Any structure may be used as long as stress is prevented from concentrating on the connection portion between the external terminal 13 and the external terminal 13.

  Moreover, in the electrical storage apparatus 1 of the said embodiment and said other embodiment, although the 1st bus bar 51 and the edge part bus bar 53A have the 1st-3rd members 51-53, 91-93, It is not limited. For example, the first bus bar 51 and the end bus bar 53A may have only the first members 55 and 91 and the second members 56 and 92, that is, the configuration without the third members 57 and 93. Even in such a configuration, the first conductive surfaces 553A and 913A and the second conductive surfaces 563A and 922A are pressed against each other by disposing the mounting member 6, so that even if vibration or the like is applied to the power storage device 1, the first member The conduction state between 55 and 91 and the second members 56 and 92 can be reliably maintained.

  Moreover, in the electrical storage apparatus 1 of the said embodiment, although the attachment member 6 has penetrated the 1st conduction | electrical_connection part 553 and the 2nd conduction | electrical_connection part 563, it is not limited to this structure. If the attachment member 6 is a structure which presses the 1st conduction | electrical_connection part 553 and the 2nd conduction | electrical_connection part 563 to the 1st adjacent member 21, you may penetrate the other site | part of the 1st member 55 and the 2nd member 56, It is not necessary to penetrate the first member 55 and the second member 56.

  Although the insulating plate (insulating member) 8 of the said embodiment is a rectangular plate shape, it is not limited to this structure. For example, as shown in FIG. 19, the insulating plate 8 </ b> A includes a plate-like main body 81 that can be inserted between the first conductive surface 553 </ b> A and the second conductive surface 563 </ b> A, and a protrusion that protrudes from the main body 81. The structure provided with the part 82 may be sufficient. In addition, in the example shown in FIG. 19, although the protrusion part 82 is cylindrical shape, it is not limited to this structure. The protrusion 82 may not be hollow but may be solid. Further, the projecting portion 82 may have a column shape having another cross-sectional shape such as a prism.

  In this case, the dimension of the main body 81 in the insertion direction between the conduction surfaces 553A and 563A is larger than at least one of the dimension of the first conduction surface 553A and the second conduction surface 563A in the insertion direction, and the protruding portion 82. However, when the main body 81 is inserted between the conductive surfaces 553A and 563A, the main body 81 is disposed at a portion protruding from between the conductive surfaces 553A and 563A.

  In this case, as shown in FIG. 20, the power storage device 1 includes a bus bar plate 100 that holds the bus bar 5, and the bus bar plate 100 has a position where the first conductive surface 553 </ b> A and the second conductive surface 563 </ b> A overlap. And a long hole 101 at a position corresponding to (in the example shown in FIG. 20, a position overlapping in the Y-axis direction), and an engaging portion 102 that engages with the protruding portion 82. The long hole 101 has such a size that the body 81 of the insulating plate 8 can be inserted, and the engaging portion 102 has a force that the protrusion 82 has a predetermined size or larger when the insulating plate 8 is inserted into the long hole 101. Is engaged with the protrusion 82. A specific configuration of the engaging portion 102 is not limited. That is, the engaging part 102 should just be the structure engaged with the protrusion part 82 so that the insulation plate 8 can be pulled out.

  According to this configuration, when the main body 81 is inserted between the first conductive surface 553A and the second conductive surface 563A of the bus bar 5 having the first member 55 and the second member 56, the protruding portion 82 is connected to the power storage device 1. (Specifically, by engaging with the engaging portion 102 of the bus bar plate 100), the main body 81 of the insulating plate 8 is unlikely to fall out between the first conductive surface 553A and the second conductive surface 563A. Thereby, even if shaking, a vibration, etc. are added with respect to the electrical storage apparatus 1 to which the insulating plate 8 was attached, the state which cannot input / output electricity of the electrical storage apparatus 1 can be maintained. Note that the part (member) with which the protruding portion 82 of the insulating plate 8 is engaged in the power storage device 1 is not limited to the bus bar plate 100 and may be a part of the power storage device 1. That is, the engaging portion 102 may be provided in a portion (member) other than the bus bar plate in the power storage device 1.

  For example, as shown in FIGS. 21 and 22, the insulating plate 8B includes a plate-like main body 81 that can be inserted between conductive surfaces between the first conductive surface 553A and the second conductive surface 563A, and the main body 81. One end portion (the end portion on the first member 55 side in the X-axis direction when the main body 81 is inserted between the conductive surfaces 553A and 563A) extends from the one surface side (upward in FIG. 22) of the main body 81. The other surface of the main body 81 from the first protrusion 83 and the other end of the main body 81 (the end on the second member 56 side in the X-axis direction when the main body 81 is inserted between the conductive surfaces 553A and 563A) And a second convex portion 84 extending to the side (downward in FIG. 22). In this case, the first protrusion 83 is formed between the end surface (left end surface in FIG. 22) of the second conductive portion 563 including the second conductive surface 563A and the member (part) facing the end surface. It extends from the main body 81 so as to block the gap. The 2nd convex part 84 interrupts | blocks between the end surface (end surface of the right end in FIG. 22) of the 1st conduction | electrical_connection part 553 containing the 1st conduction | electrical_connection surface 553A and the member (part | part) facing this end surface. Extends from the main body 81. Here, the first convex portion 83 and the second convex portion 84 are plate-like in the example shown in FIG. 21, but are not limited to this configuration. For example, as shown in FIG. You may form the 1st convex part 83 and the 2nd convex part 84 by making the thickness dimension of an edge part larger than the thickness dimension of another site | part. In the insulating plate 8B shown in FIG. 21, the first convex portion 83 and the second convex portion 84 are continuous in the direction in which the edge of the main body 81 extends in the X-axis direction (Y-axis direction). It is not limited to, The 1st convex part 83 and the 2nd convex part 84 may be intermittent in the direction where the said edge extends.

  According to these structures, when the space | interval (space | interval of an X-axis direction) between the electrical storage elements 10 in which the 1st member 55 and the 2nd member 56 are connected to the external terminal 13 becomes small, the 1st conduction | electrical_connection part The second convex portion 84 inhibits contact of the tip of the tip of the second member 56 side of 553 with the tip (in the example shown in FIG. 22, the first standing portion 5641) facing the tip in the X-axis direction. Contact of the tip of the second conducting portion 563 on the first member 55 side with the tip (second rising portion 5542 in the example shown in FIG. 22) facing the tip in the X-axis direction is inhibited by the first convex portion 83. Is done. Accordingly, even when the interval between the power storage elements 10 is reduced, the first conductive portion 553 is reliably prevented from coming into contact with the second member 56, and the second conductive portion 563 contacts the first member 55. The contact is surely prevented.

  Although the electrical storage apparatus 1 of the said embodiment is equipped with the terminal block 7, it is not limited to this structure. The power storage device 1 may be configured without the terminal block 7. In this case, in the plurality of power storage elements 10 connected in series by the plurality of bus bars 5, the bus bar 5 connected to the external terminal 13 located at the extreme end (the positive side end and the negative side end) of the current path is Functions as a total terminal.

  In the power storage device 1 of the above embodiment, the first bus bar 51 in which the first conductive surface 553A and the second conductive surface 563A are detachably stacked is outside the adjacent power storage element 10 via the first adjacent member 21. Although the terminals 13 are connected (made conductive), the configuration is not limited to this. For example, the first bus bar 51 may connect the external terminals 13 of the adjacent power storage elements 10 via the second adjacent member 22.

  In the power storage device 1 of the above embodiment, the first bus bar 51 connects (conducts) the two external terminals 13 to each other, but is not limited to this configuration. The first bus bar 51 may connect three or more external terminals 13 to each other. For example, specifically, the first member 55 may be connected to two or more external terminals 13 on one side of the first adjacent member 21 in the X-axis direction, and the second member 56 is the first adjacent member in the X-axis direction. The other side of 21 may be connected to two or more external terminals 13.

  In the power storage device 1 of the embodiment or the other embodiment described above, the bus bars 5 in which the first conduction surfaces 553A and 913A and the second conduction surfaces 563A and 922A are detachably stacked are adjacent to each other via the adjacent member 2. Although the external terminals 13 of the electricity storage element 10 or the total terminals 71 adjacent to each other via the adjacent member 2 and the external terminal 13 of the electricity storage element 10 are connected, the present invention is not limited to this configuration. The bus bar 5 in which the first conductive surfaces 553A and 913A and the second conductive surfaces 563A and 922A are detachably overlapped connects the external terminals 13 of the adjacent power storage elements 10 without the adjacent member 2 positioned therebetween. It may be configured to be conductive.

  In the power storage device 1 of the above embodiment, the bus bar 5 is connected (fixed) to the external terminal 13 of the power storage element 10 by welding, but the configuration is not limited thereto. For example, the external terminal of the electricity storage element 10 is constituted by a bolt (in other words, a bolt terminal type electricity storage element is used), and a nut is screwed into the external terminal with the bolt type external terminal passing through the bus bar 5. By doing so, the bus bar 5 may be connected (fixed) to an external terminal. That is, the bus bar 5 may be detachably fixed (connected) to the external terminal of the power storage element 10.

  DESCRIPTION OF SYMBOLS 1 ... Power storage device, 2 ... Adjacent member, 21 ... 1st adjacent member (adjacent member), 211 ... 1st main-body part, 2111 ... Connection part, 2112 ... Bus bar support part, 2112A ... Groove, 2113 ... Fixing part, 212 ... First restricting portion, 213 ... shaft portion, 215 ... ventilation path, 216 ... convex portion, 22 ... second adjacent member, 221 ... second main body portion, 222 ... second restricting portion, 225 ... ventilation passage, 226 ... convex portion 23 ... 3rd adjacent member, 231 ... 3rd main-body part, 232 ... 3rd control part, 235 ... Ventilation path, 3 ... Holding member, 30 ... Termination member, 300 ... Main body, 301 ... Press-contact part, 302 ... Supporting piece 31 ... Opposing member, 310 ... Beam part, 311 ... First connecting part, 3111, 3112 ... Through hole, 312 ... Second connecting part, 313 ... Third connecting part, 4 ... Insulator, 5 ... Bus bar, 50 ... Middle Bus bar, 51 ... first bus bar, 52 ... second bus bar, 2A ... Through-hole, 53, 53A ... End bus bar, 531, 914 ... Third detour part, 5311, 9141 ... Third upright part, 5312, 9142 ... Fourth upright part, 5313, 9143 ... Curved part, 533 ... First Three connecting portions, 533A ... through hole, 534 ... fourth connecting portion, 534A ... through hole, 55, 91 ... first member, 551,911 ... first connecting portion, 551A, 911A ... through hole, 552,912 ... first. One extending portion, 553, 913 ... first conducting portion, 553A, 913A ... first conducting surface, 553B, 913B ... through hole, 554 ... first detour portion, 5541 ... first standing portion, 5542 ... second standing portion , 5543 ... curved portion, 555, 915 ... first guide portion, 555A ... protruding piece, 555B ... opposing surface, 56, 92 ... second member, 561, 921 ... second connecting portion, 561A ... through hole, 562, 922 …second Installation part, 563... Second conduction part, 563A, 922A... Part, 565, 925 ... second guide part, 565A ... projecting piece, 565B ... opposing surface, 57, 93 ... third member, 571, 931 ... third member body, 571A, 931A ... through hole, 572, 932 ... Connection part, 58 ... connection member, 59 ... fastening member, 6 ... mounting member, 61 ... male screw part, 62 ... head, 7 ... terminal block, 71 ... total terminal, 711 ... plate-like member, 7111 ... first part, 7112: Second part, 712 ... Screw member, 7121 ... Male screw part, 7122 ... Head part, 72 ... Base part, 721 ... Side wall part, 722 ... Bus bar support part, 723 ... Fixing part, 73 ... Terminal cover, 8, 8A ... Insulating plate (insulating member , 81 ... Main body, 82 ... Projection, 83 ... First convex, 84 ... Second convex, 10 ... Power storage element, 10A ... First power storage element, 10B ... Second power storage element, 11 ... Electrode body 12 ... Case, 120 ... Case body, 121 ... Cover plate, 123 ... Closing part, 124 ... Body part, 13 ... External terminal, 100 ... Busba plate, 101 ... Elongated hole, 102 ... Engagement part, B ... Bolt

Claims (10)

A plurality of power storage elements each having an external terminal and arranged in the first direction;
A bus bar for connecting the external terminals of different power storage elements, and
The bus bar is connected to at least a first member connected to the external terminal of a predetermined power storage element of the plurality of power storage elements and the external terminal of another power storage element of the plurality of power storage elements. A second member,
The first member and the second member are directly or indirectly conducted to form a conduction path,
The power storage device is configured such that the conduction path can be separated or divided in the middle. The first member has a first connection part connected to the external terminal of a predetermined power storage element among the plurality of power storage elements, and a first extending part extending from the first connection part,
The second member has a second connection part connected to the external terminal of another power storage element among the plurality of power storage elements, and a second extension part extending from the second connection part,
The first extending portion has a first conduction surface,
The power storage device according to claim 1, wherein the second extending portion has a second conduction surface that is detachably overlapped with the first conduction surface in a state of facing the first conduction surface.   The power storage device according to claim 2, wherein each of the first conduction surface and the second conduction surface is a plane including a first direction.   At least one of the first extension part and the second extension part is closer to the first connection part or to the second connection part than the first conduction surface or the part including the second conduction surface. The power storage device according to claim 2, wherein the power storage device has a bent portion at a close position. An adjacent member disposed between the power storage elements adjacent in the first direction;
An attachment member detachably attached to the adjacent member,
The bus bar connects the external terminals of the electricity storage elements arranged on both sides of the adjacent member in the first direction,
The mounting member includes a first conduction part that is a part including the first conduction surface of the first extension part, and a second conduction part that is a part including the second conduction surface of the second extension part. Is pressed against the adjacent member,
Each of said 1st conduction | electrical_connection surface and said 2nd conduction | electrical_connection surface is a plane which cross | intersects the direction which the said attachment member presses said 1st conduction | electrical_connection part and said 2nd conduction | electrical_connection part toward the said adjacent member. The electrical storage apparatus of any one of -4. The bus bar includes a third member that is overlapped with the first extending portion and the second extending portion from the side opposite to the adjacent member,
The adjacent member has a female screw portion at a position overlapping the bus bar in the second direction,
The mounting member is a male screw that is screwed into the female screw portion in a state of passing through the first extending portion, the second extending portion, and the third member in an overlapping state from the side of the third member. Part
The power storage device according to claim 5, wherein the third member has a contact portion that contacts the adjacent member in a rotation direction when the male screw portion is screwed into the female screw portion.   The electrical storage apparatus of any one of Claims 2-6 provided with the insulating member inserted so that extraction is possible between said 1st conduction surface and said 2nd conduction surface. The first extending portion has a first guide portion extending from an edge of the first conduction surface,
The second extending portion has a second guide portion extending from a position corresponding to the first guide portion at an edge of the second conduction surface,
The power storage device according to any one of claims 2 to 7, wherein a distance between the first guide portion and the second guide portion increases as the distance from the first conductive surface and the second conductive surface increases. An adjacent member disposed between the storage elements adjacent in the first direction,
The bus bar has a connection member that connects the first member and the second member so as to be conductive, and connects the external terminals of the power storage elements arranged on both sides in the first direction of the adjacent member,
The power storage device according to claim 1, wherein the connection member is in contact with at least one of the first member and the second member so as to be separable. A storage element having an external terminal;
Total terminals used for input and output of electricity to the outside,
A bus bar for electrically connecting the external terminal and the total terminal;
The bus bar is
A first member having a first connecting portion connected to the external terminal, and a first extending portion extending from the first connecting portion;
A second member having a second connecting portion connected to the total terminal, and a second extending portion extending from the second connecting portion;
Have
The first extending portion has a first conduction surface,
The power storage device, wherein the second extending portion has a second conduction surface that is detachably superimposed on the first conduction surface in a state of facing the first conduction surface.