JP2018156932A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device capable of saving space even in a configuration in which a conductive member connected to a power storage unit is arranged.SOLUTION: A power storage device 1 includes a power storage unit 10 including an electric storage element 20, a bus bar 40 connected to an electrode terminal of the electric storage element 20, and an exterior body 11, and a conductive member 12 connected to the power storage unit 10, and the exterior body 11 includes a convex portion 110 in which the external surface disposed to face the bus bar 40 protrudes and a concave portion 120 in which the external surface disposed adjacent to the convex portion 110 is recessed. The conductive member 12 is provided in the concave portion 120.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a power storage device including a power storage unit having a power storage element and an exterior body, and a conductive member connected to the power storage unit.

  Conventionally, power storage devices having a configuration in which a conductive member such as an external wiring is connected to a power storage unit having a power storage element and an exterior body are widely known. For example, in Patent Document 1, a harness (conductive member) is connected to a battery module (power storage unit) having a battery cell (power storage element) and a cover member (exterior body), and the harness is connected to both ends of the cover member. There is disclosed a battery pack (power storage device) configured to be disposed between standing portions provided on the battery.

Japanese Patent Laid-Open No. 2006-51511

  However, the conventional power storage device has a problem in that it cannot save space because a space is provided in order to arrange the conductive member connected to the power storage unit. That is, in the conventional power storage device, since the standing portions are provided at both ends of the cover member in order to arrange the harness as the conductive member, the height of the standing portion is added to the height of the cover member. As a result, the height of the cover member is increased, and space saving cannot be achieved.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a power storage device that can save space even in a configuration in which a conductive member connected to a power storage unit is disposed.

  To achieve the above object, a power storage device according to one embodiment of the present invention includes a power storage element, a bus bar connected to an electrode terminal of the power storage element, a first power storage unit including an exterior body, and the first power storage. A first conductive member connected to the unit, and the exterior body includes a convex portion protruding from the outer surface disposed to face the bus bar, and a concave portion recessed from the outer surface disposed adjacent to the convex portion. The first conductive member is disposed in the recess.

  According to this, in the power storage device, the exterior body of the first power storage unit has the convex portion facing the bus bar and the concave portion adjacent to the convex portion, and is connected to the first power storage unit. The conductive member is disposed in the recess. That is, in the first power storage unit, since the portion where the bus bar is disposed protrudes outward, when the exterior body is formed along the bus bar, a convex portion is formed at a position facing the bus bar of the exterior body, A concave portion is formed at a position adjacent to the convex portion. Thereby, by arranging a conductive member such as an external wiring connected to the first power storage unit in the concave portion, the space in the concave portion can be effectively utilized and space saving can be achieved.

  Moreover, you may decide to have the 1st convex part arrange | positioned the said convex part facing the electrode terminal of the said electrical storage element.

  According to this, the convex part arrange | positioned facing the bus-bar in the exterior body of a 1st electrical storage unit has the 1st convex part arrange | positioned facing the electrode terminal of an electrical storage element. That is, since the electrode terminal of the energy storage element protrudes outward, when the exterior body is formed along the electrode terminal, the first convex portion is formed at a position facing the electrode terminal of the exterior body, and the first convex A concave portion is formed at a position adjacent to the portion. Thereby, by arranging a conductive member such as an external wiring connected to the first power storage unit in the concave portion, the space in the concave portion can be effectively utilized and space saving can be achieved.

  Moreover, you may decide to have the said 1st recessed part arrange | positioned between two said 1st convex parts arrange | positioned facing the electrode terminal of two different electrical storage elements.

  According to this, the 1st recessed part is formed in the exterior body of a 1st electrical storage unit between the two 1st convex parts facing the electrode terminal of two different electrical storage elements. That is, the first recesses are formed on the outer surface of the exterior body so as to face the gaps between the electrode terminals of the different power storage elements, and the conductive member is disposed in the first recesses, whereby the gaps between the electrode terminals of the different power storage elements. Can be effectively used to save space.

  Moreover, you may decide to have the said 2nd recessed part arrange | positioned between the said 2nd 1st convex parts which the said recessed part arrange | positions facing two electrode terminals of the same electrical storage element.

  According to this, the 2nd recessed part is formed in the exterior body of a 1st electrical storage unit between the two 1st convex parts facing two electrode terminals of the same electrical storage element. That is, facing the gap between the electrode terminals of the same power storage element, forming a second recess on the outer surface of the exterior body, and arranging a conductive member in the second recess, the electrode terminals of the same power storage element It is possible to save space by effectively utilizing the gap.

  The bus bar includes two terminal connection portions connected to electrode terminals of two different power storage elements, and an intermediate portion disposed between the two terminal connection portions, You may decide to have the 2nd convex part arrange | positioned facing an intermediate part.

  According to this, the exterior body of a 1st electrical storage unit has a 2nd convex part arrange | positioned facing the said intermediate part of a bus bar. That is, in the first power storage unit, generally, the intermediate portion of the bus bar protrudes outward, so that when the exterior body is formed along the intermediate portion, the position facing the intermediate portion of the exterior body A second convex portion is formed on the first convex portion, and a concave portion is formed at a position adjacent to the second convex portion. Thereby, by arranging a conductive member such as an external wiring connected to the first power storage unit in the concave portion, the space in the concave portion can be effectively utilized and space saving can be achieved.

  Moreover, you may decide to have the said recessed part which has a 3rd recessed part recessed rather than the said 2nd convex part arrange | positioned facing at least 1 terminal connection part of the said 2 terminal connection parts.

  According to this, the exterior body of a 1st electrical storage unit has the 3rd recessed part arrange | positioned facing the terminal connection part of a bus bar. That is, in the first power storage unit, generally, the terminal connection portion of the bus bar is recessed from the intermediate portion, so when the exterior body is formed along the bus bar, the third recess facing the terminal connection portion is formed. It is formed. Thereby, by arranging a conductive member such as an external wiring connected to the first power storage unit in the third recess, the space in the third recess can be effectively used, and space saving can be achieved.

  Further, the first conductive member is an external wiring connected to the first power storage unit, the first power storage unit further includes a connector to which the external wiring is connected, and the connection port of the connector is You may decide to open and arrange | position toward the direction along the bottom face of the said recessed part, and the inside of the said recessed part.

  According to this, the first power storage unit has a connector to which external wiring as the first conductive member is connected, and the connection port of the connector extends in the direction along the bottom surface of the recess of the exterior body and within the recess. It is arranged to open toward the direction. Thus, since the connection port of the connector opens toward the recess of the exterior body, the external wiring can be arranged in the recess and connected to the connector. Thereby, since the said recessed part can be effectively utilized as a space for connecting external wiring to a connector, space saving can be achieved.

  In addition, the connector may be disposed at a central portion of the exterior body.

  According to this, the connector and the external wiring connected thereto can be protected from an external impact or the like by arranging the connector at the center of the exterior body. In other words, by arranging the connector in the concave portion located in the central portion of the exterior body, a convex portion is arranged outside the connector, so that the connector and external wiring interfere with external members by the convex portion. Is suppressed, and the connector and the external wiring can be effectively protected. For example, if the external wiring is electrically connected to the electrode terminal of the power storage element, the external wiring may come into contact with each other to cause a short circuit, which can be protected. Thus, by arranging the connector in the central portion of the exterior body, the connector and the external wiring can be effectively protected while saving space.

  In addition, the exterior body may include a holding portion that holds the first conductive member in the recess.

  According to this, since the exterior body has the holding portion that retains the first conductive member in the recess, the conductive member is held in the recess of the exterior body, and the conductive member is lifted from the recess or from the exterior body. It can suppress that it comes off. Thus, space saving can be achieved by holding the first conductive member in the recess so as not to protrude from the recess.

  Further, the power storage device further includes a second power storage unit different from the first power storage unit, and a second conductive member connected to the second power storage unit, wherein the second conductive member is the concave portion of the first power storage unit. May be arranged.

  According to this, the power storage device further includes the second power storage unit and the second conductive member connected to the second power storage unit, and the second conductive member is in the recess of the exterior body of the first power storage unit. Be placed. Thus, space can be saved by effectively utilizing the space in the recess of the exterior body of the first power storage unit as a space for arranging the second conductive member connected to the second power storage unit. .

  Further, the first power storage unit further includes a harness plate in which an internal wiring is disposed between the power storage element and the exterior body, and the exterior body has the portion where the recess is not formed, You may decide to have the rib which opposes a harness plate.

  According to this, the exterior body is provided with ribs that face the harness plate in a portion where no recess is formed. That is, since a gap is formed between the outer body and the harness plate, the rib is disposed between the harness plate and the harness plate. Thus, even if the recess for arranging the conductive member is formed in the exterior body, the rib can fill the gap between the harness plate and the associated harness plate, so that the wiring on the harness plate and the harness plate The connector or the like can be prevented from floating.

  The first power storage unit may further include a thermistor, and the rib may be disposed at a position that closes an opening adjacent to the thermistor.

  According to this, since the rib of the exterior body is arranged at a position that closes the opening adjacent to the thermistor, the thermistor is affected by the external temperature by closing the opening near the thermistor with the rib of the exterior body. Can be suppressed. Thus, the rib of the exterior body that fills the gap between the harness plate can be used as a rib that closes the opening in the vicinity of the thermistor.

  Note that the present invention can be realized not only as a power storage device but also as an exterior body included in the power storage device.

  According to the power storage device of the present invention, space can be saved even in the configuration in which the conductive member connected to the power storage unit is arranged.

It is a perspective view which shows the external appearance of the electrical storage unit which concerns on embodiment. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage unit which concerns on embodiment. It is a perspective view which shows the structure of the cover body of the electrical storage unit which concerns on embodiment. It is sectional drawing which shows the structure around the cover body of the electrical storage unit which concerns on embodiment. It is sectional drawing which shows the structure around the cover body of the electrical storage unit which concerns on embodiment. It is a top view which shows the structure of the electrical storage apparatus which concerns on embodiment. It is sectional drawing which shows the structure around the cover body of the electrical storage unit which concerns on the modification of embodiment. It is a top view which shows the structure of the electrical storage apparatus which concerns on the modification of embodiment.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below show comprehensive or specific examples. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. In each drawing, dimensions and the like are not strictly illustrated.

  In the following description and drawings, the direction in which the electrode terminals are arranged in one power storage element, the facing direction of the short side surface of the container of the power storage element, or the facing direction of the long side surface of the exterior body of the power storage unit Define. In addition, an arrangement direction of the plurality of power storage elements, a facing direction of the long side surface of the container of the power storage element, a thickness direction of the container, or a facing direction of the short side surface of the exterior body of the power storage unit is defined as a Y axis direction. Further, the alignment direction of the exterior body body and the outer lid of the energy storage unit, the alignment direction of the energy storage element, the inner lid, the harness plate and the outer lid, the alignment direction of the container body and the lid of the energy storage element, or the vertical direction It is defined as the axial direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect (orthogonal in this embodiment). Although the case where the Z-axis direction does not become the vertical direction may be considered depending on the usage mode, the Z-axis direction will be described below as the vertical direction for convenience of explanation. In the following description, for example, the X axis direction plus side indicates the arrow direction side of the X axis, and the X axis direction minus side indicates the opposite side to the X axis direction plus side. The same applies to the Y-axis direction and the Z-axis direction.

(Embodiment)
First, the structure of the electrical storage unit 10 with which the electrical storage apparatus 1 (refer FIG. 6) in this Embodiment is provided is demonstrated. FIG. 1 is a perspective view showing an external appearance of a power storage unit 10 according to the present embodiment. FIG. 2 is an exploded perspective view showing each component when the power storage unit 10 according to the present embodiment is disassembled.

  The power storage unit 10 is a device that can charge electricity from the outside and discharge electricity to the outside. For example, the power storage unit 10 is a battery module used for power storage use, power supply use, and the like. Specifically, the power storage unit 10 is, for example, an automobile such as an electric vehicle (EV), a hybrid electric vehicle (HEV), or a plug-in hybrid electric vehicle (PHEV), a motorcycle, a watercraft, a snowmobile, an agricultural machine, a construction It is used as a battery for driving a moving body such as a machine or starting an engine.

  As shown in FIG. 1 and FIG. 2, the power storage unit 10 includes an exterior body 11 including a lid body 100 and an exterior body body 200, a plurality of electrical storage elements 20 accommodated inside the exterior body 11, an inner lid 30, and a plurality. Bus bar 40, harness plate 50, internal wiring 60, and the like.

  The exterior body 11 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage unit 10. That is, the exterior body 11 is disposed outside the power storage element 20, the harness plate 50, and the like, and the power storage element 20 is disposed at a predetermined position to protect it from impacts and the like. The exterior body 11 is made of an insulating material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polybutylene terephthalate (PBT), or ABS resin. Thus, the exterior body 11 avoids the storage element 20 and the like from coming into contact with a metal member or the like.

  Here, the exterior body 11 includes a flat rectangular lid body 100 that constitutes a lid body (outer lid) of the exterior body 11 and an exterior body body 200 that constitutes the main body of the exterior body 11. The exterior body 200 is a bottomed rectangular cylindrical housing in which an opening is formed. That is, the lid body 100 is arranged so as to close the opening of the exterior body main body 200. Note that the lid 100 and the exterior body 200 may be formed of members of the same material, or may be formed of members of different materials. An opening 100a, which is a rectangular through hole, is formed at the center of the lid 100, and rectangular notches are formed at the corners of the lid 100 on the X axis plus side and on both sides in the Y axis. An opening 100b that is a rectangular cutout is formed at the center in the X-axis direction and on the minus side in the Y-axis direction. A detailed description of the configuration of the lid 100 will be described later.

  The storage element 20 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. . The power storage element 20 has a flat rectangular parallelepiped shape (square shape), and in this embodiment, eight power storage elements 20 (power storage elements 20A to 20H) are arranged in the Y-axis direction. In addition, the shape of the electrical storage element 20 and the number of the electrical storage elements 20 arranged are not limited. The storage element 20 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, a capacitor, or a user charging a battery. The battery may be a primary battery that can use the stored electricity without having to perform the operation.

  Specifically, the electricity storage element 20 includes a metal container 21, and a lid portion of the container 21 is provided with a positive electrode terminal 22 and a negative electrode terminal 23 that are metal electrode terminals. The lid portion of the container 21 may be provided with a liquid injection part for injecting an electrolytic solution, a gas discharge valve for discharging gas and releasing the pressure when the pressure in the container 21 rises. In addition, an electrode body (also referred to as a power storage element or a power generation element), a current collector (a positive electrode current collector and a negative electrode current collector), and the like are disposed inside the container 21, and an electrolytic solution (nonaqueous electrolyte) or the like Although it is enclosed, detailed description is omitted.

  Here, the positive electrode terminal 22 and the negative electrode terminal 23 are arranged to protrude from the lid portion of the container 21 toward the lid body 100 (upward, that is, toward the positive side in the Z-axis direction), and are formed with threads. A bolt terminal having a bolt portion. Then, the negative electrode terminal 23 of the electricity storage element 20A, which is the outermost electrode terminal of the plurality of electricity storage elements 20, and the positive electrode terminal 22 of the electricity storage element 20H are the corners on the X axis direction plus side and the Y axis direction both sides of the lid 100. It is exposed from the opening 100b formed. The outermost electrode terminal is connected to an external terminal (not shown), or the outermost electrode terminal functions as an external terminal, so that the power storage unit 10 is charged with electricity from the outside. Electricity can be discharged to the outside.

  The inner lid 30 is a flat rectangular member that constitutes the inner lid of the exterior body 11, and has a function of reinforcing the exterior body main body 200. Further, the inner lid 30 is disposed between the harness plate 50 and the power storage element 20, holds the harness plate 50 from below, and holds the power storage element 20 from above. The inner lid 30 is made of an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. Moreover, the opening part 31 is formed in the corner | angular part of the X-axis direction plus side and the Y-axis direction both sides of the inner cover 30. FIG. The opening 31 is an opening through which a connecting member 41 that connects a thermistor 63 described later and an electrode terminal of the power storage element 20 is inserted.

  The bus bar 40 is a rectangular plate-like member that is disposed on the plurality of power storage elements 20 (on the inner lid 30) and electrically connects the electrode terminals of the plurality of power storage elements 20 to each other. The bus bar 40 is formed of a conductive member made of metal such as copper, copper alloy, aluminum, aluminum alloy, for example. Specifically, a through hole is formed in the bus bar 40, and a bolt part of an electrode terminal of the power storage element 20 is inserted into the through hole, and a nut is fastened to the bolt part, whereby the bus bar 40 The electrode terminal is connected. In the present embodiment, bus bar 40 connects eight power storage elements 20 in series by connecting positive electrode terminal 22 and negative electrode terminal 23 of adjacent power storage elements 20. In addition, the connection aspect of the electrical storage element 20 is not limited to the above, The serial connection and the parallel connection may be combined in any way.

  Further, as described above, the connecting member 41 is disposed at a position corresponding to the negative electrode terminal 23 of the power storage element 20A and the positive electrode terminal 22 of the power storage element 20H, which are the outermost electrode terminals of the plurality of power storage elements 20. . The connection member 41 is a member that connects the outermost electrode terminal and the thermistor 63. That is, through holes are formed in the connection member 41, bolt portions of these outermost electrode terminals are inserted into the through holes, and the thermistor 63 is connected to the tip of the connection member 41. The temperature of the electrode terminal can be measured. In addition, the connection member 41 has a distal end inserted into the opening 31 of the inner lid 30, and a portion connected to the electrode terminal other than the distal end is an opening formed at a corner of the lid 100. It is exposed from 100b.

  The harness plate 50 is a flat rectangular member on which electrical components such as the internal wiring 60, the connectors 61 and 62, and the thermistor 63 are disposed, and is disposed between the power storage element 20 and the lid 100. The harness plate 50 is made of, for example, an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. That is, the harness plate 50 is placed on the inner lid 30 to hold the internal wiring 60, the connectors 61 and 62, the thermistor 63, and the like, and to insulate the internal wiring 60 and the like from other members, and The position of the internal wiring 60 etc. is regulated.

  The internal wiring 60 is an internal harness including wiring for making various connections such as wiring for connecting each electrode terminal of the power storage element 20 and the connector 61, and wiring for connecting the thermistor 63 and the connector 62, for example. The harness plate 50 is attached.

  The connector 61 is a high voltage connector connected to each electrode terminal of the electricity storage element 20. The connector 61 is attached to the harness plate 50 and is exposed from the opening 100a formed at the center of the lid 100. The connector 62 is a low voltage connector connected to the thermistor 63. The connector 62 is attached to the harness plate 50 and is exposed from the opening 100c formed at the center in the X-axis direction and on the minus side in the Y-axis direction of the lid 100. As a result, the connector 61 is disposed at the center of the exterior body 11, and the connector 62 is disposed at the end of the exterior body 11. Further, the connectors 61 and 62 are arranged with connection ports opened outward, and external wiring is connected to the connection ports.

  The thermistor 63 is a temperature sensor that is attached to the harness plate 50 and connected to the electrode terminal of the electricity storage element 20 via the connection member 41 and measures the temperature of the electrode terminal (that is, measures the temperature of the electricity storage element 20). is there. In the present embodiment, two thermistors 63 are arranged, but the number of thermistors 63 is not particularly limited.

  Next, the configuration of the lid 100 of the power storage unit 10 and the configuration around the lid 100 will be described in detail. FIG. 3 is a perspective view showing a configuration of lid 100 of power storage unit 10 according to the present embodiment. Specifically, FIG. 3A is an enlarged perspective view showing the configuration of the lid 100 shown in FIG. 2, and FIG. 3B is the lid of FIG. It is a perspective view at the time of seeing the body 100 from diagonally downward. 4 and 5 are cross-sectional views showing the configuration around the lid 100 of the power storage unit 10 according to the present embodiment. Specifically, FIG. 4 is a cross-sectional view showing a configuration around the lid 100 when the power storage unit 10 shown in FIG. 1 is cut along a plane parallel to the XZ plane including the IV-IV line. FIG. 5 is a cross-sectional view showing a configuration around the lid 100 when the power storage unit 10 shown in FIG. 1 is cut along a plane parallel to the YZ plane including the VV line.

  As shown in these drawings, the lid 100 has a convex part 110 with an outer surface protruding facing the bus bar 40 and a concave part 120 with an outer surface recessed adjacent to the convex part 110. doing. In the present embodiment, convex portion 110 is a convex portion that is disposed to face the electrode terminal of power storage element 20. The convex portion 110 is an example of a first convex portion.

  Specifically, the convex part 110 has convex parts 111 and 112 at positions facing the negative electrode terminal 23 and the positive electrode terminal 22 of the power storage element 20B. That is, the convex part 110 has the convex parts 111 and 112 at positions facing the bus bar 40 connected to the negative electrode terminal 23 of the power storage element 20B and the bus bar 40 connected to the positive electrode terminal 22 of the power storage element 20B. ing. The convex portion 110 has convex portions 113 and 114 at positions facing the positive electrode terminal 22 and the negative electrode terminal 23 of the power storage element 20C. That is, the convex part 110 has the convex parts 113 and 114 at positions facing the bus bar 40 connected to the positive electrode terminal 22 of the power storage element 20C and the bus bar 40 connected to the negative electrode terminal 23 of the power storage element 20C. ing.

  Similarly, the convex portion 110 has a convex portion 115 at a position facing the respective electrode terminals of the negative electrode terminal 23 and the positive electrode terminal 22 of the energy storage device 20D and the positive electrode terminal 22 and the negative electrode terminal 23 of the energy storage device 20E. ~ 118. That is, the protrusion 110 includes a bus bar 40 connected to the negative electrode terminal 23 of the energy storage device 20D, a bus bar 40 connected to the positive electrode terminal 22 of the energy storage device 20D, a bus bar 40 connected to the positive electrode terminal 22 of the energy storage device 20E, and The convex portions 115 to 118 are provided at positions facing the bus bar 40 connected to the negative electrode terminal 23 of the electricity storage device 20E.

  The convex portions 111 and 112 are connected together with the convex portion facing the positive electrode terminal 22 of the power storage element 20 </ b> A to form one large convex portion 101. An opening 100b is formed at a position of the convex portion 101 facing the negative electrode terminal 23 of the power storage element 20A. The convex portions 117 and 118 are connected together with the convex portions facing the positive electrode terminal 22 and the negative electrode terminal 23 of the power storage elements 20F and 20G and the negative electrode terminal 23 of the power storage element 20H to form one large convex portion 102. ing. An opening 100b is formed at a position of the convex portion 102 facing the positive electrode terminal 22 of the power storage element 20H.

  Here, the convex portion 110 (the convex portions 111 to 118) is a portion having a concavo-convex structure in which the outer surface of the lid 100 protrudes and the inner surface is recessed, and the electrode of the power storage element 20 is formed on the recessed portion of the inner surface. Terminal bolts and nuts are arranged. That is, the convex part 110 is arrange | positioned so that the circumference | surroundings and upper part of the upper part of the electrode terminal of the electrical storage element 20 may be covered.

  Moreover, the recessed part 120 has the 1st recessed parts 121-126 arrange | positioned between the two convex parts 110 arrange | positioned facing the electrode terminal of two different electrical storage elements 20. FIG. Specifically, the first concave portion 121 is a convex portion that is two convex portions 110 facing the negative electrode terminal 23 of the electric storage element 20B and the positive electrode terminal 22 of the electric storage element 20C, which are electrode terminals of two adjacent electric storage elements 20. It is a recess disposed between 111 and 113. Similarly, the 1st recessed part 122 is a recessed part arrange | positioned between the convex parts 112 and 114 facing the positive electrode terminal 22 of the electrical storage element 20B, and the negative electrode terminal 23 of 20 C of electrical storage elements. The same applies to the first recesses 123 to 126.

  In addition, the recess 120 includes second recesses 127 to 129 that are disposed between the two protrusions 110 that are disposed to face the two electrode terminals of the same power storage element 20. Specifically, the second concave portion 127 is a concave portion disposed between the convex portions 111 and 112 that are the two convex portions 110 facing the negative electrode terminal 23 and the positive electrode terminal 22 of the power storage element 20B. Similarly, the second concave portion 128 is between the convex portions 113 and 114 facing the positive electrode terminal 22 and the negative electrode terminal 23 of the power storage device 20C, and the second concave portion 129 is facing the negative electrode terminal 23 and the positive electrode terminal 22 of the power storage device 20D. It is a recessed part arrange | positioned between the convex parts 115 and 116 which were made.

  As described above, the recess 120 is one large recess formed by connecting the first recesses 121 to 126 and the second recesses 127 to 129, and has a bottom surface 103. An opening 100 a is formed at the boundary position between the bottom surface 103 of the concave portion 120 and the convex portion 102. And the connector 61 is arrange | positioned at the opening part 100a. As a result, as shown in FIG. 4, the connection port 61 a of the connector 61 is disposed so as to open in a direction along the bottom surface 103 of the recess 120 and inward of the recess 120.

  The exterior body 11 includes ribs 130 and 131 that face the harness plate 50 in a portion where the recess 120 is not formed. That is, the rectangular ribs 130 and 131 protruding downward (Z-axis direction minus side) are arranged on the inner surface (Z-axis direction minus side surface) of the projection 110 (projections 101 and 102) of the lid 100. ing. Specifically, as shown in FIG. 5, the rib 130 protrudes toward the harness plate 50 and is disposed at a position where the tip abuts against the upper surface of the harness plate 50.

  The rib 131 protrudes toward the inner lid 30 and is disposed at a position that closes the opening 31 of the inner lid 30. That is, the rib 131 is disposed at a position that closes the opening 31 that is an opening adjacent to the thermistor 63. In the present embodiment, the rib 131 is disposed so as to abut on the upper surface of the distal end portion of the connection member 41 connected to the thermistor 63, presses the thermistor 63 from above, and at least the opening 31 near the thermistor 63. Some parts are blocked.

  In addition, the lid body 100 is provided with holding portions 113 a and 114 a that hold external wiring in the recess 120. The holding parts 113a and 114a are convex parts formed continuously between the convex parts 113 and 114 between the convex part 113 and the convex part 114, and a through hole is formed at the tip part. That is, the external wiring is connected to the power storage unit 10, the external wiring is disposed in the concave portion 120, and is held in the concave portion 120 by the holding portions 113a and 114a. These will be described in detail below. FIG. 6 is a plan view showing a configuration of power storage device 1 according to the present embodiment.

  As shown in the figure, the power storage device 1 includes a first power storage unit 10A, which is three power storage units 10, a second power storage unit 10B and a third power storage unit 10C, and a first conductive member 12A which is three conductive members 12. The second conductive member 12B and the third conductive member 12C are provided. The first conductive member 12A is an external wiring (external harness) connected to the first power storage unit 10A. Similarly, the second conductive member 12B and the third conductive member 12C are external wirings (external harnesses) connected to the second power storage unit 10B and the third power storage unit 10C.

  The first conductive member 12A is connected to the connector 61 of the first power storage unit 10A, the second conductive member 12B is connected to the connector 61 of the second power storage unit 10B, and the third conductive member 12C is connected to the third power storage unit 10B. It is connected to the connector 61 of the unit 10C. At this time, the first conductive member 12A is disposed in the recess 120 of the first power storage unit 10A, and the second conductive member 12B is disposed in the recess 120 of the first power storage unit 10A and the recess 120 of the second power storage unit 10B. . Similarly, the third conductive member 12C is disposed in the recess 120 of the first power storage unit 10A, the recess 120 of the second power storage unit 10B, and the recess 120 of the third power storage unit 10C.

  Specifically, the first conductive member 12A is disposed in the first recess 125 of the first power storage unit 10A. The second conductive member 12B is disposed in the first recesses 123 and 124 of the first power storage unit 10A and the first recess 123 and the second recess 129 of the second power storage unit 10B. Similarly, the third conductive member 12C includes the first recesses 121 and 122 of the first power storage unit 10A, the first recesses 121 and 122 of the second power storage unit 10B, the first recess 121 of the third power storage unit 10C, the first Located in the two recesses 128 and 129. Note that these conductive members 12 (external wiring) are connected to a substrate or the like, and control and the like of charging / discharging of the power storage element 20 in the power storage device 1 are performed.

  Each power storage unit 10 includes a harness cover 70 that covers the conductive member 12. That is, the holding parts 113 a and 114 a are provided on the lid body 100 of the exterior body 11 of each power storage unit 10. The conductive member 12 is held in the recess 120 by placing and fixing the harness cover 70 on the holding portions 113a and 114a. For example, the harness cover 70 is fixed to the lid 100 by inserting (fitting) projections provided on the harness cover 70 into through holes formed in the holding portions 113a and 114a.

  As described above, according to the power storage device 1 according to the embodiment of the present invention, the exterior body 11 of the power storage unit 10 includes the convex portion 110 facing the bus bar 40 and the concave portion 120 adjacent to the convex portion 110. The conductive member 12 connected to the power storage unit 10 is disposed in the recess 120. That is, in the power storage unit 10, the portion where the bus bar 40 is disposed protrudes outward. Therefore, when the exterior body 11 is formed along the bus bar 40, the convex portion 110 is formed at a position facing the bus bar 40 of the exterior body 11. The recess 120 is formed at a position adjacent to the protrusion 110. Thereby, by arranging the conductive member 12 such as the external wiring connected to the power storage unit 10 in the concave portion 120, the space in the concave portion 120 can be effectively utilized and space saving can be achieved.

  In addition, since the electrode terminal of the power storage element 20 protrudes outward, when the exterior body 11 is formed along the electrode terminal, the convex portion 110 is formed at a position facing the electrode terminal of the exterior body 11, A recess 120 is formed at a position adjacent to the portion 110. Thereby, by arranging the conductive member 12 such as the external wiring connected to the power storage unit 10 in the concave portion 120, the space in the concave portion 120 can be effectively utilized and space saving can be achieved.

  In addition, in the exterior body 11 of the power storage unit 10, first concave portions 121 to 126 are formed between two convex portions 110 facing the electrode terminals of two different power storage elements 20. That is, the first recesses 121 to 126 are formed on the outer surface of the exterior body 11 so as to face the gap between the electrode terminals of the different power storage elements 20, and the conductive member 12 is disposed in any one of the first recesses 121 to 126. By doing so, the space between the electrode terminals of the different power storage elements 20 can be effectively utilized, and space saving can be achieved.

  Further, in the exterior body 11 of the power storage unit 10, second concave portions 127 to 129 are formed between the two convex portions 110 facing the two electrode terminals of the same power storage element 20. That is, the second recesses 127 to 129 are formed on the outer surface of the exterior body 11 so as to face the gap between the electrode terminals of the same power storage element 20, and the conductive member 12 is placed in any one of the second recesses 127 to 129. By disposing, the space between the electrode terminals of the same power storage element 20 can be effectively used, and space saving can be achieved.

  In addition, the power storage unit 10 includes a connector 61 to which external wiring as the conductive member 12 is connected, and the connection port 61a of the connector 61 extends in the direction along the bottom surface 103 of the recess 120 of the exterior body 11 and the recess 120. It is arranged to open inward. Thus, since the connection port 61a of the connector 61 opens toward the recess 120 of the exterior body 11, external wiring can be arranged in the recess 120 and connected to the connector 61. Thereby, since the recessed part 120 can be effectively used as a space for connecting the external wiring to the connector 61, space saving can be achieved.

  In addition, by arranging the connector 61 at the center of the exterior body 11, the connector 61 and the external wiring (conductive member 12) connected thereto can be protected from external impacts and the like. That is, by arranging the connector 61 in the concave portion located in the central portion of the exterior body 11, the convex portion 110 is arranged outside the connector 61. Interference with the member is suppressed, and the connector 61 and the external wiring can be effectively protected. For example, if the external wiring is electrically connected to the electrode terminal of the power storage element 20, the external wiring may come into contact with each other to cause a short circuit, which can be protected. Thus, by arranging the connector 61 in the central portion of the exterior body 11, the connector 61 and the external wiring can be effectively protected while saving space.

  The exterior body 11 includes holding portions 113 a and 114 a that hold the conductive member 12 in the recess 120. That is, the conductive member 12 is held in the recess 120 by the harness cover 70 being held by the holding portions 113 a and 114 a of the lid 100. For this reason, it is possible to hold the conductive member 12 in the recess 120 of the exterior body 11 and to prevent the conductive member 12 from being lifted from the recess 120 or detached from the exterior body 11. In this way, space can be saved by holding the conductive member 12 in the recess 120 so as not to protrude from the recess 120.

  The power storage device 1 includes a first power storage unit 10A and a second power storage unit 10B that are power storage units 10, and a first conductive member 12A and a second conductive member 12B that are conductive members 12, and the like. The two conductive members 12B are disposed in the recesses 120 of the exterior body 11 of the first power storage unit 10A. Thus, space is saved by effectively utilizing the space in the recess 120 of the exterior body 11 of the first power storage unit 10A as a space for arranging the second conductive member 12B connected to the second power storage unit 10B. Can be achieved.

  The exterior body 11 is provided with ribs 130 and 131 facing the harness plate 50 in a portion where the recess 120 is not formed. That is, since a gap is formed between the exterior body 11 and the harness plate 50 at a portion where the recess 120 is not formed, the ribs 130 and 131 are disposed between the exterior body 11 and the harness plate 50. Thus, even if the recess 120 for disposing the conductive member 12 is formed in the exterior body 11, the ribs 130 and 131 can fill the gap between the conductive plate 12 and the harness plate 50. In addition, the internal wiring 60 and the connectors 61 and 62 on the harness plate 50 can be prevented from floating.

  Further, since the rib 131 of the exterior body 11 is disposed at a position that closes the opening 31 adjacent to the thermistor 63, the thermistor 63 is externally closed by closing the opening 31 near the thermistor 63 with the rib 131 of the exterior body 11. It is possible to suppress the influence of the temperature. As described above, the rib 131 of the exterior body 11 that fills the gap between the harness plate 50 and the opening 31 near the thermistor 63 can be used as a rib.

(Modification)
Next, a modification of the above embodiment will be described. In the above embodiment, the electrode terminal of the electricity storage element 20 is a bolt terminal having a bolt part, and the bolt part is inserted into the through hole of the bus bar 40 and the nut is fastened to the bolt part, whereby the electricity storage element 20. The electrode terminal and the bus bar 40 were connected. However, in this modification, the electrode terminal of the electricity storage element does not have a bolt part, and is a welding terminal connected (joined) to the bus bar by welding.

  FIG. 7 is a cross-sectional view showing a configuration around the lid 300 of the power storage unit according to the modification of the present embodiment. FIG. 8 is a plan view showing a configuration of a power storage unit according to a modification of the present embodiment. 7 is a diagram corresponding to a part of FIG. 5, and FIG. 8 is a diagram corresponding to a part of FIG.

  As shown in FIGS. 7 and 8, the electricity storage device 20 (in this figure, electricity storage devices 20I to 20K) in this modification is replaced with the positive electrode terminal 22 and the negative electrode terminal 23 of the electricity storage device 20 in the above embodiment, A positive terminal 24 and a negative terminal 25 are provided. Further, the bus bar 42 in this modification has a terminal connection part 42a and an intermediate part 42b.

  The positive terminal 24 and the negative terminal 25 are welding terminals that are connected (joined) to the bus bar 42 by welding. Specifically, the positive terminal 24 and the negative terminal 25 are joined to the terminal connection part 42a of the bus bar 42 by welding. For example, the positive terminal 24 of the power storage element 20I is welded and joined to one terminal connection part 42a of the bus bar 42, and the negative terminal 25 of the power storage element 20J is welded and joined to the other terminal connection part 42a of the bus bar 42. Is done.

  That is, the terminal connection portion 42 a is a portion of the bus bar 42 that is connected to the electrode terminal of the power storage element 20, and is connected to the electrode terminals of two different power storage elements 20 with respect to one bus bar 42. Two terminal connection portions 42a are arranged. Moreover, the intermediate part 42b is a site | part arrange | positioned between the two terminal connection parts 42a. The intermediate portion 42b is a curved portion (hinge portion) provided so that the bus bar 42 can expand and contract in the Y-axis direction and the Z-axis direction, and protrudes from the two terminal connection portions 42a to the positive side in the Z-axis direction. Is provided.

  Moreover, the cover body 300 in this modification has the convex part 310 and the recessed part 320 instead of the convex part 110 and the recessed part 120 of the cover body 100 in the said embodiment. In other words, the convex portion 310 is a convex portion with an outer surface protruding facing the bus bar 42, and the concave portion 320 is a concave portion with an outer surface disposed adjacent to the convex portion 310.

  Here, the convex part 310 has the 1st convex part 311 arrange | positioned facing the electrode terminal (In the same figure, the positive electrode terminal 24 and the negative electrode terminal 25 of the electrical storage elements 20I-20K). . That is, the first convex portion 311 is disposed to face the terminal connection portion 42 a of the bus bar 42. Specifically, the first convex portion 311 is disposed so as to cover the electrode terminal of the electricity storage device 20 and the upper side of the terminal connection portion 42a (Z-axis direction plus side), and is a top view (viewed from the Z-axis direction). And a shape (rectangular shape in the figure) corresponding to the electrode terminal and the terminal connection portion 42a. Moreover, the 1st convex part 311 protrudes rather than the 1st recessed part 321 and the 2nd recessed part 322 of the recessed part 320 mentioned later.

  Moreover, the convex part 310 has the 2nd convex part 312 arrange | positioned facing the intermediate part 42b of the bus-bar 42. FIG. Specifically, the second convex portion 312 is disposed so as to cover the upper portion (Z-axis direction plus side) of the intermediate portion 42b, and corresponds to the intermediate portion 42b in a top view (viewed from the Z-axis direction). It has the shape (rectangular shape in the figure). The second convex portion 312 is formed so as to protrude from the first convex portion 311.

  The concave portion 320 is disposed between two first convex portions 311 disposed opposite to electrode terminals of two different power storage elements 20 (for example, the negative electrode terminal 25 of the power storage element 20J and the positive electrode terminal 24 of the power storage element 20K). The first recess 321 is provided. Specifically, the first recess 321 is disposed between two adjacent bus bars 42 so as to face the lid portion of the container 21 of the power storage element 20 and is viewed from above (viewed from the Z-axis direction). The shape corresponding to the space between the two bus bars 42 (rectangular shape in the figure). In addition, the 1st recessed part 321 has the structure similar to the 1st recessed parts 121-126 in the said embodiment.

  In addition, the concave portion 320 is disposed between two first convex portions 311 that are disposed to face two electrode terminals (for example, the positive electrode terminal 24 and the negative electrode terminal 25 of the electric storage device 20I) of the same electric storage device 20. The second recess 322 is provided. In addition, the 2nd recessed part 322 has the structure similar to the 2nd recessed parts 127-129 in the said embodiment.

  Furthermore, the recessed part 320 has the 3rd recessed part 323 dented rather than the 2nd convex part 312 arrange | positioned facing the at least 1 terminal connection part 42a of the two terminal connection parts 42a. In the present modification, the third concave portion 323 is the first convex portion 311 described above. In other words, the first convex portion 311 is a convex portion with respect to the first concave portion 321 and the second concave portion 322, but is a concave portion with respect to the second convex portion 312. it can.

  In the above configuration, the conductive member 12 is disposed in the recess 320 as described with reference to FIG. That is, the conductive member 12 is disposed in any one of the first recess 321, the second recess 322, and the third recess 323.

  Here, for example, when the conductive member 12 is arranged extending in the X-axis direction (in the case of the second conductive member 12B or the third conductive member 12C in FIG. 6), the conductive member 12 is moved to the first recess. If the conductive member 12 is disposed at 321 and extends in the X-axis direction, the conductive member 12 interferes with the second convex portion 312.

  Specifically, the groove-shaped portion formed by the first concave portion 321 and the second concave portion 322 disposed to face each other between the negative electrode terminal 25 of the energy storage device 20J and the positive electrode terminal 24 of the energy storage device 20K is electrically conductive. It is possible to arrange the member 12. However, with respect to the conductive member 12 (second conductive member 12B or third conductive member 12C in FIG. 6) arranged extending straight in the X-axis direction across the adjacent power storage units 10, the power storage element Since the second convex portion 312 and the conductive member 12 that are disposed to face each other between the positive terminal 24 of 20J and the negative terminal 25 of the storage element 20K are disposed so as to overlap in the Z-axis direction, The height dimension of the entire unit will increase.

  In such a case, the conductive member 12 can be arranged in parallel to the X-axis direction by arranging the conductive member 12 in the third recesses 323 (and the second recesses 322) on both sides in the X-axis direction. As shown in FIG. 6, when the conductive member 12 is connected to the connector 61, the conductive member 12 can also be disposed in the first recess 321. For example, the first conductive member 12A in FIG. 6 can be disposed in the first recess 321 without any problem.

  For the second conductive member 12B and the third conductive member 12C in FIG. 6, as another solution to the above-described interference problem in the Z-axis direction, for example, the conductive member between the second recess 322 or the adjacent power storage units 10. It is possible to arrange the conductive member 12 in the first concave portion 321 by bending 12 and avoiding the second convex portion 312.

  Other configurations in the present modification are the same as those in the above embodiment, and thus detailed description thereof is omitted.

  As described above, according to the power storage device according to this modification, the same effects as those of the above-described embodiment can be obtained. In particular, the exterior body (lid body 300) of the power storage unit has a second convex portion 312 that is disposed to face the intermediate portion 42 b of the bus bar 42. That is, when the intermediate portion 42b of the bus bar 42 protrudes outward, when the exterior body is formed along the intermediate portion 42b, the second convex portion 312 is formed at a position facing the intermediate portion 42b of the exterior body. A recess 320 is formed at a position adjacent to the second protrusion 312. Thereby, by arranging a conductive member such as an external wiring connected to the power storage unit in the concave portion 320, the space in the concave portion 320 can be effectively utilized and space saving can be achieved.

  In addition, the exterior body (cover body 300) of the power storage unit has a third recess 323 that is disposed to face the terminal connection portion 42a of the bus bar 42. That is, since the terminal connection part 42a of the bus bar 42 is recessed from the intermediate part 42b, when the exterior body is formed along the bus bar 42, a third recess 323 facing the terminal connection part 42a is formed. Thereby, by arranging a conductive member such as an external wiring connected to the power storage unit in the third recess 323, the space in the third recess 323 can be effectively used to save space.

  In the bus bar 42, the intermediate portion 42b is a curved portion provided to protrude from the terminal connection portion 42a to the plus side in the Z-axis direction. However, even in the case where the intermediate part 42b has a flat plate shape or the like that is not curved as described above, a voltage or temperature measurement harness or the like is connected to the intermediate part 42b, so that the connection part with the harness or the like is connected to the terminal When projecting from the portion 42a, the lid 300 has a convex portion similar to the above configuration. In this case, the same thing can be said as in the modification example, and the same effect as in the modification example can be obtained.

  The power storage device according to the embodiment of the present invention and the modification thereof has been described above, but the present invention is not limited to the above-described embodiment and the modification. In other words, it should be considered that the embodiment and its modification disclosed this time are illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the above embodiment, a battery module including a plurality of power storage elements 20 is illustrated as the power storage unit 10, but a battery pack including a plurality of battery modules may be used as the power storage unit 10. The same applies to the modified example (the same applies to the following).

  Moreover, in the said embodiment, although the recessed part 120 formed in the cover body 100 shall be formed between the two convex parts 110, the recessed part (of the cover body 100 of the cover body 100) adjacent to one convex part 110 was assumed. The recess 120 may be a recess 120 whose outer surface is recessed stepwise.

  In the above embodiment, the conductive member 12 is an external wiring, but the conductive member 12 may be a conductive member other than the external wiring. For example, the conductive member 12 may be a substrate, a fuse, a relay, a thermistor, or other electrical components.

  In the above embodiment, the power storage device 1 has the three power storage units 10 arranged in a line. However, the number and arrangement of the power storage units 10 included in the power storage device 1 are limited to the above. Not. For example, only one power storage unit 10 may be disposed, and when a plurality of power storage units 10 are disposed, any number of power storage units 10 may be disposed at any position.

  Moreover, in the said embodiment, although the conductive member 12 was arrange | positioned in the position as shown in FIG. 6, each conductive member 12 is the recessed part 120 of the cover body 100 which each electrical storage unit 10 has. It may be arranged in any of the recesses.

  Moreover, in the said embodiment, the holding parts 113a and 114a were provided in the cover body 100, and the harness cover 70 was arrange | positioned. However, a configuration in which the harness cover 70 is disposed without the holding portions 113a and 114a being provided on the lid 100 may be employed, or a configuration in which the harness cover 70 is not disposed may be employed.

  Moreover, in the said embodiment, the electrical storage unit 10 is equipped with the connector 61 which has the connection port 61a opened toward the recessed part 120 in the center part of the cover body 100, and external wiring is connected to the connector 61. did. However, the connector 61 may be disposed at any position of the lid 100, and the connection port 61a of the connector 61 may be opened in any direction. Alternatively, the power storage unit 10 may not have the connector 61, and a wiring or the like extending from the opening 100a may be disposed in the recess 120.

  Further, in the above-described embodiment, the lid body 100 is provided with the rib 130 that contacts the harness plate 50 and the rib 131 that contacts the connecting member 41 and closes a part of the opening 31 near the thermistor 63. It was decided. However, the rib 130 may not contact the harness plate 50, and the rib 131 may not contact the connection member 41 or may block the entire opening 31. Alternatively, the lid 100 may have a configuration in which the ribs 130 and 131 are not provided. Alternatively, a configuration in which the harness plate 50 and the thermistor 63 are not arranged may be used.

  In addition, embodiments constructed by arbitrarily combining the constituent elements included in the above-described embodiment and its modifications are also included in the scope of the present invention.

  Note that the present invention can be realized not only as a power storage device but also as an exterior body (lid 100 or 300) included in the power storage device.

  The present invention can be applied to a power storage device including a power storage element such as a lithium ion secondary battery.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Power storage unit 10A First power storage unit 10B Second power storage unit 11 Exterior body 12 Conductive member 12A First conductive member 12B Second conductive member 20, 20A-20K Power storage element 22, 24 Positive electrode terminal 23, 25 Negative electrode terminal 31 Opening 40, 42 Bus bar 42a Terminal connection portion 42b Intermediate portion 50 Harness plate 60 Internal wiring 61, 62 Connector 61a Connection port 63 Thermistor 100, 300 Lid 101, 102, 110-118, 310 Protruding portion 103 Bottom surface 113a, 114a Holding Part 120, 320 Concave part 121-126, 321 First concave part 127-129, 322 Second concave part 130, 131 Rib 311 First convex part 312 Second convex part 323 Third concave part

Claims (12)

A power storage element, a bus bar connected to an electrode terminal of the power storage element, and a first power storage unit having an exterior body;
A first conductive member connected to the first power storage unit,
The exterior body is
A convex portion protruding from the outer surface disposed to face the bus bar;
A concave portion having a concave outer surface disposed adjacent to the convex portion,
The first conductive member is a power storage device disposed in the recess. The power storage device according to claim 1, wherein the convex portion includes a first convex portion that is disposed to face an electrode terminal of the power storage element. The power storage device according to claim 2, wherein the concave portion includes a first concave portion disposed between the two first convex portions disposed to face electrode terminals of two different power storage elements. The power storage device according to claim 2 or 3, wherein the recess has a second recess disposed between the two first protrusions disposed to face two electrode terminals of the same power storage element. The bus bar has two terminal connection portions connected to electrode terminals of two different power storage elements, and an intermediate portion disposed between the two terminal connection portions,
The power storage device according to any one of claims 1 to 4, wherein the convex portion includes a second convex portion that is disposed to face the intermediate portion. The power storage device according to claim 5, wherein the concave portion has a third concave portion which is disposed to face at least one terminal connecting portion of the two terminal connecting portions and is recessed from the second convex portion. The first conductive member is an external wiring connected to the first power storage unit,
The first power storage unit further includes a connector to which the external wiring is connected,
The power storage device according to any one of claims 1 to 6, wherein a connection port of the connector is disposed to open in a direction along a bottom surface of the concave portion and inward of the concave portion. The power storage device according to claim 7, wherein the connector is disposed in a central portion of the exterior body. The power storage device according to any one of claims 1 to 8, wherein the exterior body includes a holding portion that holds the first conductive member in the recess. further,
A second power storage unit different from the first power storage unit;
A second conductive member connected to the second power storage unit,
The power storage device according to any one of claims 1 to 9, wherein the second conductive member is disposed in the recess of the first power storage unit. The first power storage unit further includes a harness plate in which internal wiring is disposed between the power storage element and the exterior body,
The power storage device according to any one of claims 1 to 10, wherein the exterior body has a rib facing the harness plate in a portion where the recess is not formed. The first power storage unit further includes a thermistor,
The power storage device according to claim 11, wherein the rib is disposed at a position that closes an opening adjacent to the thermistor.

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