Power storage device

Abstract

To provide a power storage device with high safety, the power storage device comprising a connector to / from which an external wire is attachable / detachable.SOLUTION: A power storage device comprises: power storage elements 20A-20H; a first wire 65a which is electrically connected with the power storage elements; a flat and rectangular wire holding member 50 which holds the first wire; and a first connector 85 which is connected with the first wire, the first connector being mounted to the wire holding member and an external wire being attachable thereto / detachable therefrom. The wire holding member includes a regulation part which is a claw-like portion or a projection-like portion, and the regulation part holds the first wire. The first connector includes a connection port disposed in a second direction crossing a first direction which is an arrangement direction of the wire holding member and the first connector, and in a view in the first direction, the regulation part is positioned in the second direction of the connection port.SELECTED DRAWING: Figure 4A

Description

[Technical Field]

[0001] The present invention relates to an electric storage device including an electric storage element and a wiring holding member that holds wiring electrically connected to the electric storage element. [Background technology]

[0002] Conventionally, there have been monitoring devices that monitor the state of a power storage device that includes one or more power storage elements. For example, Patent Document 1 discloses a battery monitoring device that includes a high-voltage side connector that is electrically connected to a battery and a low-voltage side connector that is connected to a host microcontroller. In this battery monitoring device, the high-voltage side connector and the low-voltage side connector are arranged on opposing sides of a housing in a plan view. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-115647 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, a power storage device connected to an external device such as the battery monitoring device is also provided with a connector for connecting to external wiring. Because this connector is an electrical connection point between the power storage device and the external device, when the power storage device is mounted on a mobile object such as an electric vehicle (EV) for driving or starting the mobile object, it is necessary to devise a way to protect it from impacts, etc. In particular, a high level of safety is required for the connector electrically connected to the power storage element of the power storage device.

[0005] Therefore, if a connector electrically connected to the storage element is placed at the end of the housing (the outer casing of the storage device), as in the above-mentioned conventional battery monitoring device, there may be a problem in that the connector is susceptible to impact.

[0006] The present invention was made by the present inventors by focusing on the above-mentioned problem, and aims to provide a highly safe energy storage device that is equipped with a connector that can be attached and detached to external wiring. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, an energy storage device according to one embodiment of the present invention comprises an energy storage element, a first wiring electrically connected to the energy storage element, a flat rectangular wiring holding member that holds the first wiring, and a first connector connected to the first wiring, the first connector being attached to the wiring holding member and allowing external wiring to be attached and detached, wherein the wiring holding member has a regulating portion that is a claw-shaped portion or a protrusion-shaped portion, the regulating portion holds the first wiring, the first connector has a connection port arranged in a second direction that intersects with a first direction that is the arrangement direction of the wiring holding member and the first connector, and the regulating portion is located in the second direction of the connection port when viewed from the first direction. Furthermore, an energy storage device according to another aspect of the present invention may include an energy storage element, a first wiring electrically connected to the energy storage element, a flat, rectangular wiring holding member that holds the first wiring, a first connector connected to the first wiring, the first connector attached to the wiring holding member and to which an external wiring can be detachably attached, and an inner lid disposed between the energy storage element and the wiring holding member, wherein the inner lid holds the wiring holding member and also holds the energy storage element. Furthermore, an energy storage device according to another aspect of the present invention may include an energy storage element, a first wiring electrically connected to the energy storage element, the wiring holding member that holds the first wiring, and a first connector connected to the first wiring, the first connector being located in a central portion of the wiring holding member and to which an external wiring can be detachably attached.

[0008] According to this configuration, the first wiring electrically connected to the energy storage element is provided in the energy storage device while being held by the wiring holding member. Therefore, for example, during manufacturing (assembly) of the energy storage device, the first wiring can be incorporated into the energy storage device while being held by the wiring holding member. This, for example, makes it less likely that the first wiring will be pinched between components. Also, for example, compared to when the first wiring has a high degree of freedom of movement, the possibility of defects such as disconnection of the first wiring is reduced. Furthermore, since the first connector is located in the center of the wiring holding member, the possibility of damage to the first connector that is electrically connected to the energy storage element is reduced, for example, in the event of a collision accident involving a mobile body equipped with the energy storage device. In other words, the occurrence of unsafe events such as external short circuits due to damage to the first connector is suppressed. As such, the energy storage device according to this aspect is a highly safe energy storage device that includes a connector to which external wiring can be detached.

[0009] Furthermore, the energy storage device according to one aspect of the present invention may further include a second wiring that is a wiring for a lower voltage than the first wiring, the second wiring being held by the wiring holding member, and a second connector that is connected to the second wiring and is located at an end of the wiring holding member.

[0010] According to this configuration, as described above, in an energy storage device in which the possibility of damage to the first high-voltage connector is reduced in the event of a collision accident, for example, external wiring can be easily attached and detached to the second low-voltage connector at the end of the wiring holding member.

[0011] If an excessive external force is applied to the connector due to a collision between a moving body equipped with the power storage device and an object, or due to the external wiring being forcibly attached or detached from the connector, the connector may be damaged. If the connector is damaged, the state of the power storage device may not be properly checked, or safety issues such as an external short circuit may occur.

[0012] Therefore, in the electricity storage device according to this aspect, the first connector to which a relatively high voltage is applied is less likely to be damaged in an emergency such as a collision, and the second connector to which a relatively low voltage is applied is less likely to be damaged when the external wiring is attached or detached (at least one of when the external wiring is attached and detached), thereby providing a highly safe electricity storage device.

[0013] Furthermore, in an energy storage device according to one aspect of the present invention, the wiring holding member may have a regulating portion that regulates the first wiring and the second wiring to a position aligned within the first region in a direction that intersects with the alignment direction of the energy storage element and the wiring holding member.

[0014] According to this configuration, for example, when the wiring holding member is disposed on the energy storage element, the first wiring and the second wiring do not overlap each other vertically at least in the first region, thereby suppressing an increase in the vertical size. Furthermore, when a cover or the like is disposed to cover the wiring holding member, the possibility of the first wiring or the second wiring being broken by pressure from the cover is reduced.

[0015] Furthermore, the energy storage device according to one embodiment of the present invention may further include a cover member that covers the wiring holding member from the side opposite the energy storage element, and the cover member may have a lower surface portion formed at a position opposite the first region that forms an outer surface closer to the wiring holding member than other portions.

[0016] With this configuration, the space formed by the recessed lower surface of the cover member can be used to arrange external wiring or electrical equipment such as a control board, thereby ensuring the safety of the power storage device and making effective use of the space around the power storage device.

[0017] In the energy storage device according to one aspect of the present invention, the first wiring and the second wiring may be arranged to bypass a second region on an opening side of the first connector.

[0018] This configuration ensures ease of attachment and detachment of the external wiring to the first connector disposed in the center of the wiring holding member, thereby reducing the possibility of damage to the first connector when the external wiring is attached to or detached from the first connector.

[0019] In the energy storage device according to one aspect of the present invention, the wire holding member may have a wall portion that stands along at least a part of a periphery of the second region.

[0020] According to this configuration, the wall portion makes it possible to forcibly position the first wiring and the second wiring outside the second region when or after arranging the first wiring and the second wiring on the wiring holding member, thereby more reliably facilitating attachment and detachment of the external wiring to and from the first connector, for example.

[0021] The present invention can be realized not only as an electricity storage device, but also as a wiring holding member included in the electricity storage device. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a highly safe electricity storage device that includes a connector to which external wiring can be attached and detached. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing the appearance of a power storage device according to an embodiment; [Figure 2] 1 is a first exploded perspective view illustrating components of an electricity storage device according to an embodiment when the device is disassembled. FIG. [Figure 3] FIG. 2 is a second exploded perspective view showing the components of the electricity storage device according to the embodiment when disassembled. [Figure 4A] FIG. 2 is a plan view showing a layout of first wiring according to the embodiment. [Figure 4B] FIG. 10 is a plan view showing a layout of second wiring according to the embodiment. [Figure 5]FIG. 2 is an enlarged perspective view of a portion of the harness plate according to the embodiment. [Figure 6] 1 is a plan view showing a first configuration example of a battery pack according to an embodiment. [Figure 7] FIG. 10 is a plan view showing a second configuration example of the battery pack according to the embodiment. [Figure 8] FIG. 10 is a cross-sectional view showing a configuration around a lid of an electricity storage device according to a modified example of the embodiment. [Figure 9] FIG. 10 is a plan view showing the configuration of an electricity storage device according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, with reference to the drawings, a description will be given of an energy storage device according to an embodiment of the present invention. Note that the embodiments described below are comprehensive or specific examples. The numerical values, shapes, materials, components, component placement positions, and connection forms shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept will be described as optional components. Furthermore, the dimensions and the like in each drawing are not strictly illustrated.

[0025] In the following description and drawings, the X-axis direction is defined as the direction in which the electrode terminals of one energy storage element are aligned, the direction in which the short side surfaces of the container of the energy storage element face each other, or the direction in which the long side surfaces of the exterior body of the energy storage device face each other. The Y-axis direction is defined as the direction in which the multiple energy storage elements are aligned, the direction in which the long side surfaces of the container of the energy storage element face each other, the thickness direction of the container, or the direction in which the short side surfaces of the exterior body of the energy storage device face each other. The Z-axis direction is defined as the direction in which the exterior body main body, the energy storage element, the inner lid, the harness plate, and the lid of the energy storage device are aligned, the direction in which the container main body of the energy storage element and the lid are aligned, or the up-down direction. The X-axis direction, Y-axis direction, and Z-axis direction intersect each other (orthogonal in this embodiment). Depending on the usage mode, the Z-axis direction may not be the up-down direction. However, for convenience of explanation, the Z-axis direction will be described below as the up-down direction. In the following description, for example, the positive X-axis direction refers to the direction of the arrow on the X-axis, and the negative X-axis direction refers to the opposite side to the positive X-axis direction. The same applies to the Y-axis and Z-axis directions.

[0026] (Embodiment) First, the configuration of an energy storage device 10 according to an embodiment will be described. Fig. 1 is a perspective view showing the appearance of the energy storage device 10 according to the embodiment. Fig. 2 is a first exploded perspective view showing each component when the energy storage device 10 according to the embodiment is disassembled. Fig. 3 is a second exploded perspective view showing each component when the energy storage device 10 according to the embodiment is disassembled. Note that in Fig. 3, the exterior body 11 and the inner lid 30 are omitted from the illustration in order to clearly show the relationship between the harness plate 50 and the members fixed to the harness plate 50.

[0027] The power storage device 10 is a device that can be charged with electricity from an external source and can discharge electricity to an external source. For example, the power storage device 10 is a battery module used for power storage purposes, power supply purposes, etc. Specifically, the power storage device 10 is used as a battery for driving or starting the engine of a mobile object 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, agricultural machinery, or construction machinery.

[0028] As shown in Figures 1 and 2, the energy storage device 10 includes an exterior body 11 consisting of a lid body 100 and an exterior body main body 200, and a plurality of energy storage elements 20, an inner lid 30, a plurality of bus bars 40, a harness plate 50, internal wiring 65, etc. housed inside the exterior body 11.

[0029] The exterior body 11 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the energy storage device 10. In other words, the exterior body 11 is disposed outside the energy storage elements 20 and the harness plate 50, etc., and positions the energy storage elements 20, etc. in predetermined positions to protect them 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. The exterior body 11 thereby prevents the energy storage elements 20, etc. from coming into contact with metal members, etc.

[0030] The exterior body 11 has a flat, rectangular lid body 100 that constitutes the lid (outer lid) of the exterior body 11, and an exterior body main body 200 that constitutes the main body of the exterior body 11. The lid body 100 is an example of a cover member that covers the harness plate 50 from the side opposite the energy storage device 20. The exterior body main body 200 is a rectangular cylindrical housing with a bottom and an opening formed therein. In other words, the lid body 100 is arranged so as to close the opening of the exterior body main body 200. The lid body 100 and the exterior body main body 200 may be made of the same material or may be made of different materials.

[0031] Furthermore, opening 100a, which is a rectangular through-hole, is formed in the center of lid 100, and openings 100b, which are rectangular notches, are formed in the corners of lid 100 on the positive side in the X-axis direction and on both sides of the Y-axis direction. Opening 100c, which is a rectangular notch, is further formed in lid 100 at the center of lid 100 in the X-axis direction and on the negative side in the Y-axis direction. Furthermore, lid 100 is formed with a bottom surface portion 105 that forms an outer surface closer to harness plate 50 than other portions.

[0032] The energy storage elements 20 are secondary batteries (single cells) that can charge and discharge electricity, and more specifically, are non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries. The energy storage elements 20 have a flattened rectangular parallelepiped (square) shape, and in this embodiment, eight energy storage elements 20 (energy storage elements 20A to 20H) are arranged in the Y-axis direction. The shape of the energy storage elements 20 and the number of energy storage elements 20 arranged are not limited. Furthermore, the energy storage elements 20 are not limited to non-aqueous electrolyte secondary batteries, and may be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, or primary batteries that allow stored electricity to be used without the user having to charge them.

[0033] Specifically, the energy storage element 20 includes a metal container 21, and a positive electrode terminal 22 and a negative electrode terminal 23, which are metal electrode terminals, are provided on the lid of the container 21. The lid of the container 21 may be provided with a liquid injection section for injecting an electrolyte solution, a gas exhaust valve for releasing gas when the pressure inside the container 21 increases, and the like. Inside the container 21, an electrode assembly (also referred to as an electricity storage element or a power generation element), current collectors (positive electrode current collector and negative electrode current collector), and the like are arranged, and an electrolyte solution (nonaqueous electrolyte) and the like are sealed inside, but a detailed description thereof will be omitted.

[0034] In this embodiment, the positive electrode terminal 22 and the negative electrode terminal 23 are bolt terminals having threaded bolt portions that are disposed so as to protrude from the lid portion of the container 21 toward the lid body 100 (upward, i.e., toward the positive side in the Z-axis direction). The negative electrode terminal 23 of the energy storage element 20A and the positive electrode terminal 22 of the energy storage element 20H, which are the outermost electrode terminals of the multiple energy storage elements 20, are disposed so as to be exposed from openings 100b formed in corners of the lid body 100 on the positive side in the X-axis direction and on both sides in the Y-axis direction. These outermost electrode terminals are connected to external terminals (not shown) or function as external terminals, thereby enabling the energy storage device 10 to charge with electricity from the outside and discharge electricity to the outside.

[0035] The inner lid 30 is a flat, rectangular member that constitutes the inner lid of the exterior body 11 and has the function of reinforcing the exterior body main body 200. The inner lid 30 is disposed between the harness plate 50 and the energy storage device 20, and holds the harness plate 50 from below and holds the energy storage device 20 from above. The inner lid 30 is made of an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. Openings 31 are formed in the inner lid 30 at corners on the positive side in the X-axis direction and on both sides in the Y-axis direction. A thermistor 63 and a detection terminal 80, which will be described later, are disposed in the openings 31.

[0036] The bus bar 40 is a rectangular plate-like member disposed on the plurality of energy storage elements 20 (on the inner lid 30) and electrically connects the electrode terminals of the plurality of energy storage elements 20 to each other. The bus bar 40 is formed of a conductive metal member such as copper, a copper alloy, aluminum, or an aluminum alloy. Specifically, through holes are formed in the bus bar 40, and bolt portions of the electrode terminals of the energy storage elements 20 are inserted into the through holes. Nuts 90 (see FIG. 3 ) are fastened to the bolt portions, thereby connecting the bus bar 40 to the electrode terminals. In this embodiment, the bus bar 40 connects the positive electrode terminals 22 of one of two adjacent energy storage elements 20 to the negative electrode terminals 23 of the other. As a result, the eight energy storage elements 20 are connected in series. Note that the manner in which the energy storage elements 20 are connected is not limited to the above, and any combination of series connection and parallel connection may be used.

[0037] In the present embodiment, detection terminals 80, which are terminals for detecting voltage, are arranged in contact with each of the plurality of bus bars 40. Specifically, detection terminals 80 are arranged on the upper surfaces of bus bars 40, and bus bars 40 and detection terminals 80 are fastened together by nuts 90. In other words, nuts 90 that secure bus bars 40 to electrode terminals of energy storage elements 20 secure detection terminals 80 in contact with bus bars 40.

[0038] As described above, thermistors 63 are disposed at detection terminals 80 that are respectively disposed at negative terminal 23 of energy storage element 20A and positive terminal 22 of energy storage element 20H, which are the outermost electrode terminals of the plurality of energy storage elements 20. In other words, thermistors 63 measure the temperatures of positive terminal 22 of energy storage element 20H, which is the overall positive terminal of the energy storage element unit made up of energy storage elements 20A to 20H connected in series in this embodiment, and negative terminal 23 of energy storage element 20A, which is the overall negative terminal of the energy storage element unit.

[0039] The harness plate 50 is an example of a wiring holding member, and is a flat rectangular member on which electrical components such as the internal wiring 65, the first connector 85, and the second connector 86 are arranged. The harness plate 50 is arranged between the energy storage device 20 and the lid 100.

[0040] The harness plate 50 is made of an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. That is, the harness plate 50 is placed on the inner cover 30, holds the internal wiring 65, the first connector 85, the second connector 86, etc., insulates the internal wiring 65, etc. from other components, and regulates the position of the internal wiring 65, etc.

[0041] The internal wiring 65 has a first wiring 65a that electrically connects each electrode terminal of the energy storage element 20 to the first connector 85, and a second wiring 65b that electrically connects the two thermistors 63 to the second connector 86, and is attached to the harness plate 50. The internal wiring 65 is held in the harness plate 50 by, for example, being hooked onto a first restricting portion 51 that is a claw-shaped portion provided on the harness plate 50. Details of the attachment structure of the internal wiring 65 to the harness plate 50 will be described later with reference to FIG. 5.

[0042] In this embodiment, the first connector 85 is a connector having a plurality of pins in the connection port 85a, and the second connector 86 is a connector having a plurality of pins in the connection port 86a. That is, connectors having a plurality of pin holes provided at the ends of external wiring are inserted into the connection port 85a of the first connector 85 and the connection port 86a of the second connector 86, respectively.

[0043] The first connector 85 is attached to the harness plate 50 with its rear end supported by the first connector support portion 55a of the harness plate 50. The second connector 86 is attached to the harness plate 50 with its rear end supported by the second connector support portion 55b of the harness plate 50. The rear end of each of the first connector 85 and the second connector 86 opposite the connection port (85a or 85b) is supported by the connector support portion (55a or 55b), thereby preventing the first connector 85 and the second connector 86 from floating up.

[0044] The first wiring 65a and the second wiring 65b will be described with reference to FIGS. 4A and 4B in addition to FIG. 3. FIG. 4A is a plan view showing the layout of the first wiring 65a according to the embodiment, and FIG. 4B is a plan view showing the layout of the second wiring 65b according to the embodiment. Note that, to make the layout of the first wiring 65a and the second wiring 65b easier to see, dashed lines are drawn on the first wiring 65a in FIG. 4A, and dashed lines are drawn on the second wiring 65b in FIG. 4B. Furthermore, to make the positions of the detection terminal 80 and the thermistor 63 easier to see, the detection terminal 80 is drawn with diagonal lines in FIG. 4A, and the thermistor 63 is drawn with a dot in FIG. 4B.

[0045] The first wiring 65a is a wiring for a relatively high voltage that is electrically connected to each of the multiple energy storage elements 20. Specifically, as shown in FIGS. 3 and 4A, the first wiring 65a is a wiring that connects nine detection terminals 80 (80a to 80i) and a first connector 85. As shown in FIGS. 3 and 4B, the second wiring 65b is a wiring that connects two thermistors 63 and a second connector 86. In other words, the second wiring 65b is a wiring through which a current for temperature detection flows, and is therefore a wiring for a lower voltage than the first wiring 65a.

[0046] 4A and 4B, the first connector 85 is disposed in the center of the harness plate 50, and the second connector 86 is disposed at an end of the harness plate 50. External wiring is detachably connected to each of the first connector 85 and the second connector 86. For example, a control device that controls the energy storage device 10 can measure the voltage of each energy storage element 20 of the energy storage device 10 and the temperature of the energy storage device 10 via the first connector 85, the second connector 86, and the external wiring connected to each of these connectors.

[0047] In this embodiment, of the nine detection terminals 80, the two outermost detection terminals 80, detection terminals 80a and 80i, are each connected to an electrode terminal of energy storage element 20. Specifically, detection terminal 80a is connected to negative electrode terminal 23 of energy storage element 20A, and detection terminal 80i is connected to positive electrode terminal 22 of energy storage element 20H. Note that detection terminal 80a and detection terminal 80i are each fixed to the electrode terminal by a nut not shown in FIG. 3 etc.

[0048] 3 and 4A, each of the detection terminals 80b to 80h is connected to a bus bar 40. Specifically, each of the detection terminals 80b to 80h is fixed in contact with one bus bar 40 by a nut 90 as described above. One bus bar 40 is connected to the positive electrode terminal 22 of one of two adjacent energy storage elements 20 and the negative electrode terminal 23 of the other. That is, each of the detection terminals 80b to 80h is electrically connected to the positive electrode terminal 22 of one of the corresponding two energy storage elements 20 and the negative electrode terminal 23 of the other. For example, the detection terminal 80b is electrically connected to the positive electrode terminal 22 of the energy storage element 20A and the negative electrode terminal 23 of the energy storage element 20B.

[0049] With the above configuration, the control device connected to the first connector 85 can measure the voltage of, for example, one of the storage elements 20 by measuring the potential difference between the two detection terminals 80. For example, the voltage of the storage element 20B is measured by measuring the potential difference between the detection terminal 80b and the detection terminal 80c.

[0050] The first wiring 65a can also be used as wiring for equalizing the voltages of the energy storage elements 20. For example, when the voltage of the energy storage element 20B is higher than the voltages of the other energy storage elements 20, the control device connected to the first connector 85 can discharge the energy storage element 20B by connecting the detection terminal 80b and the detection terminal 80c via a discharge circuit (balancing circuit). This reduces the voltage of the energy storage element 20B. In other words, the voltages of the multiple energy storage elements 20 are equalized.

[0051] 4B , a thermistor 63 is attached to each of the detection terminals 80a and 80i, and the two thermistors 63 are connected to the second connector 86 via second wiring 65b. Specifically, a pair of electric wires is connected to each of the two thermistors 63 as the second wiring 65b. A control device connected to the second connector 86 can measure the resistance value of the thermistor 63 via the pair of electric wires, thereby measuring the temperature of the power storage device 10 thermally connected to the thermistor 63.

[0052] As described above, the energy storage device 10 according to this embodiment includes an energy storage element 20, a first wiring 65a electrically connected to the energy storage element 20, a harness plate 50 that holds the first wiring 65a, and a first connector 85 that is connected to the first wiring 65a, is located in the center of the harness plate 50, and is capable of attaching and detaching external wiring.

[0053] According to this configuration, the first wiring 65a electrically connected to the energy storage elements 20 is provided in the energy storage device 10 while being held by the harness plate 50. Therefore, for example, during manufacturing (assembly) of the energy storage device 10, the first wiring 65a can be incorporated into the energy storage device 10 while being held by the harness plate 50. This makes it less likely for the first wiring 65a to be pinched between components. Also, for example, compared to a case where the first wiring 65a has a high degree of freedom of movement, the possibility of malfunctions such as disconnection of the first wiring 65a or severance of the connection between the first wiring 65a and the detection terminal 80 is reduced. Furthermore, since the first connector 85 is located in the center of the harness plate 50, the possibility of damage to the first connector 85, which is electrically connected to the energy storage elements 20, is reduced, for example, in the event of a collision accident involving a mobile body on which the energy storage device 10 is mounted. In other words, the occurrence of unsafe events such as an external short circuit due to damage to the first connector 85 is suppressed.

[0054] Here, assume that the energy storage device 10 is disposed in a vehicle such as an EV or PHEV, with the harness plate 50 positioned above the plurality of energy storage elements 20, i.e., with the positive side in the Z-axis direction in this embodiment facing upward. In this case, for example, when the traveling vehicle collides with an object, the energy storage device 10 is subjected to impact mainly from the side (a direction parallel to the XY plane). Under this condition, a portion of the harness plate 50 is always present on the side of the first connector 85, which is located in the center of the harness plate 50 in a plan view (when viewed from the direction in which the harness plate 50 and the plurality of energy storage elements 20 are arranged). Therefore, for example, a portion of the harness plate 50 that is located around the first connector 85 functions as a buffer member that absorbs impact. As a result, impact applied to the first connector 85 is suppressed. In other words, it can be said that the first connector 85 is disposed in a position on the harness plate 50 that is less likely to receive impact resulting from a collision accident or the like.

[0055] As described above, the power storage device 10 according to this embodiment is provided with the first connector 85 to which external wiring can be attached and detached, and is a highly safe power storage device 10.

[0056] 1, for example, an opening 100a is provided in the center of the cover 100 that covers the harness plate 50. Therefore, even when the cover 100 is placed above the harness plate 50, the connection port 85a of the first connector 85 (the opening through which the end of the external wiring is inserted and removed) is exposed from the opening 100a. Therefore, the external wiring can be attached to and removed from the first connector 85.

[0057] In the present embodiment, the harness plate 50 is disposed between the positive electrode terminal 22 and the negative electrode terminal 23 of each of the plurality of (eight in the present embodiment) energy storage elements 20. In other words, the harness plate 50 is disposed by utilizing the space between the positive electrode terminal 22 and the negative electrode terminal 23 that are provided to protrude from the container 21 of the energy storage element 20.

[0058] That is, the harness plate 50 is located at the center of the power storage device 10, for example, in the arrangement direction (X-axis direction) of the positive electrode terminal 22 and the negative electrode terminal 23. Therefore, for example, when an impact is applied to the power storage device 10 from the side in the X-axis direction, the effect of the impact on the harness plate 50 is reduced. As a result, for example, the first connector 85 is more reliably protected against the impact.

[0059] In the present embodiment, the length of harness plate 50 in the arrangement direction (Y-axis direction) of multiple energy storage elements 20 is approximately the same as the width in the Y-axis direction of an energy storage element unit made up of multiple energy storage elements 20 (see, for example, FIG. 4A ). Therefore, it can also be said that first connector 85 is located in the center of energy storage device 10, and second connector 86 is located at an end of energy storage device 10 in a plan view.

[0060] The energy storage device 10 according to this embodiment also includes a second wiring 65b, which is a wiring for a lower voltage than the first wiring 65a, and is held by the harness plate 50, and a second connector 86 connected to the second wiring 65b and located at the end of the harness plate 50.

[0061] According to this configuration, as described above, in the energy storage device 10 in which the possibility of damage to the high-voltage first connector 85 in the event of a collision accident or the like is reduced, the ease of attaching and detaching external wiring to the low-voltage second connector 86 at the end of the harness plate 50 is ensured.

[0062] Here, if an excessive external force is applied to the connector due to a collision between a moving body equipped with the power storage device 10 and an object, or due to the external wiring being forcibly attached or detached from the connector, the connector may be damaged. If the connector is damaged, the state of the power storage device 10 may not be checked correctly, or a safety problem may occur, such as an external short circuit.

[0063] Therefore, in the electricity storage device 10 according to this embodiment, the first connector 85, to which a relatively high voltage is applied, is reduced in the possibility of damage in an emergency such as a collision accident. Furthermore, the second connector 86, to which a relatively low voltage is applied, is ensured to be easy to attach and detach external wiring, thereby reducing the possibility of damage to the second connector 86 when attaching and detaching external wiring. This provides an electricity storage device with high safety.

[0064] Furthermore, the harness plate 50 according to this embodiment has a structure for regulating the position of the internal wiring 65, which tends to become complicated. This structure will be described with reference to Fig. 5 in addition to Figs. 4A and 4B described above.

[0065] Fig. 5 is an enlarged perspective view of a portion of the harness plate 50 according to the embodiment. Specifically, Fig. 5 shows an enlarged view of the portion of the harness plate 50 in front of the first connector 85 (the connection port 85a side).

[0066] As shown in Figure 5, the harness plate 50 of this embodiment has regulating portions (51, 52) that regulating the first wiring 65a and the second wiring 65b to a position aligned in a direction intersecting the alignment direction (Z-axis direction) of the storage element 20 and the harness plate 50 within the first region 56a (see Figures 4A and 4B).

[0067] Specifically, the harness plate 50 is provided with first restricting portions 51, which are claw-shaped portions, and second restricting portions 52, which are protrusion-shaped portions, as restricting portions according to the present embodiment. Each of the multiple first restricting portions 51 hooks and holds the first wiring 65a or the second wiring 65b. Furthermore, one set of the multiple second restricting portions 52 sandwiches and holds the first wiring 65a or the second wiring 65b. The first wiring 65a and the second wiring 65b are restricted by at least one of the first restricting portion 51 and the second restricting portion 52 to positions aligned in a direction (a direction along the XY plane) along the upper surface of the harness plate 50 (one surface of the internal wiring 65). As a result, in the first region 56a of the harness plate 50, the first wirings 65a do not overlap each other vertically, the second wirings 65b do not overlap each other vertically, and the first wirings 65a and the second wirings 65b do not overlap each other vertically.

[0068] As described above, with the harness plate 50 according to the present embodiment, the first wiring 65a and the second wiring 65b do not overlap each other vertically at least in the first region 56a, thereby suppressing an increase in the size in the vertical direction. Specifically, with the harness plate 50 according to the present embodiment, the first wiring 65a and the second wiring 65b can be held by utilizing the space between the plurality of energy storage devices 20 and the lid 100 and without wasting that space. More specifically, as described above, the harness plate 50 is disposed in the space between the positive electrode terminal 22 and the negative electrode terminal 23. Therefore, an increase in the size of the energy storage device 10 due to the presence of the harness plate 50 inside the energy storage device 10 is suppressed.

[0069] Furthermore, even when the cover 100 (see FIGS. 1 and 2) is disposed above the harness plate 50, the possibility of the first wiring 65a or the second wiring 65b being broken due to pressure from the cover 100 is reduced. This contributes to improving the safety of the power storage device 10.

[0070] In this embodiment, the heights of the first restricting portions 51 and the second restricting portions 52 (heights from the arrangement surface 50a of the harness plate 50 on which the internal wiring 65 is arranged) are the same (including approximately the same). Furthermore, the bottom surface 105 of the lid body 100, which faces the first region 56a, is located at a height position at which it abuts against the first restricting portions 51 and the second restricting portions 52. Therefore, the first restricting portions 51 and the second restricting portions 52 also function as supports to prevent the lid body 100 (bottom surface portion 105) from pressing against the first wiring 65a and the second wiring 65b.

[0071] Furthermore, in the present embodiment, the first wiring 65a and the second wiring 65b (more specifically, each of the plurality of electric wires constituting the first wiring 65a and the second wiring 65b) have a portion (coated portion) between both end portions held by a restricting portion (at least one of the first restricting portion 51 and the second restricting portion 52) of the harness plate 50. Therefore, the posture or position of each of the flexible first wiring 65a and the second wiring 65b inside the exterior body 11 can be stably maintained.

[0072] Also, as shown in Figures 4A, 4B and 5, in the harness plate 50 of this embodiment, the first wiring 65a and the second wiring 65b are arranged to bypass the second region 56b on the opening (connection port 85a) side of the first connector 85.

[0073] The second region 56b is a region on the side of the first connector 85 in a plan view, on the side where the connection port 85a is provided. For example, the size and shape of the second region 56b are determined by the size and shape of a connector provided at the end of the external wiring to be inserted into the connection port 85a.

[0074] This configuration ensures ease of attachment and detachment of external wiring, for example, also for the first connector 85 disposed in the center of the harness plate 50. Therefore, for example, the possibility of damaging the first connector 85 when attaching or detaching external wiring to or from the first connector 85 is reduced. In other words, for example, the possibility of performing an operation that applies unnecessary stress to the first connector 85, such as inserting external wiring obliquely into the connection port 85a due to a lack of space in front of the connection port 85a of the first connector 85, is reduced.

[0075] Furthermore, in the present embodiment, the connection port 85a of the first connector 85 opens in a direction along the arrangement surface 50a of the harness plate 50, on which the internal wiring 65 is arranged. In other words, when an external wiring is inserted into the connection port 85a of the first connector 85, the external wiring protrudes from the first connector 85 in a direction along the arrangement surface 50a. Therefore, for example, the external wiring can be connected to the first connector 85 in a position that prevents the external wiring from protruding from the power storage device 10. This can reduce the possibility of damage to the external wiring or the first connector 85 due to an external force being applied to the external wiring, for example.

[0076] The harness plate 50 also has a wall portion 54 erected along at least a portion of the periphery of the second region 56b. The presence of the wall portion 54 on the harness plate 50 thus makes it possible to forcibly position the first wiring 65a and the second wiring 65b outside the second region 56b during or after the first wiring 65a and the second wiring 65b are arranged on the harness plate 50. This further ensures that the external wiring can be easily attached to and detached from the first connector 85. This further reduces the possibility of damage to the first connector 85 when the external wiring is attached to and detached from the first connector 85.

[0077] In the present embodiment, the wall portion 54 is disposed in the harness plate 50 so as to surround the second region 56b. This allows the first wiring 65a and the second wiring 65b to be substantially completely removed from the second region 56b. Furthermore, for example, when a worker attaches or detaches external wiring to or from the first connector 85 after the lid 100 has been placed, the worker's fingers are prevented from touching the first wiring 65a or the second wiring 65b. In other words, safety is improved when attaching or detaching external wiring to or from the first connector 85.

[0078] Here, it is possible to configure one battery pack by combining a plurality of power storage devices 10 according to this embodiment. Therefore, the battery pack 1 according to this embodiment will be described with reference to Figs. 6 and 7.

[0079] Fig. 6 is a plan view showing a first configuration example of the battery pack 1 according to the embodiment, and Fig. 7 is a plan view showing a second configuration example of the battery pack 1 according to the embodiment. In Fig. 7, external wiring is schematically represented by thick lines.

[0080] As described above, the lid 100 included in the energy storage device 10 according to this embodiment has the bottom surface portion 105 formed therein, which forms an outer surface that is closer to the harness plate 50 than other portions. The bottom surface portion 105 is located at a position facing the first region 56a of the harness plate 50 (see FIGS. 4A and 4B).

[0081] That is, as explained using FIG. 5, in the first region 56a, the first wiring 65a and the second wiring 65b are arranged so as not to overlap in the vertical direction, and therefore it is possible to form the lower surface portion 105 at a position opposite the first region 56a.

[0082] In this embodiment, the lower surface portion 105 is provided as a recessed portion in the lid body 100 between the protruding portion 101 and the protruding portion 102, and this recessed portion can be used to arrange external wiring as shown in Figure 6.

[0083] 6 includes three power storage devices 10, namely, a first power storage device 10A, a second power storage device 10B, and a third power storage device 10C, and three conductive members 12, namely, a first conductive member 12A, a second conductive member 12B, and a third conductive member 12C. The first conductive member 12A is an external wiring (external harness) connected to the first power storage device 10A. Similarly, the second conductive member 12B and the third conductive member 12C are external wiring (external harness) connected to the second power storage device 10B and the third power storage device 10C.

[0084] The first conductive member 12A is connected to the first connector 85 of the first power storage device 10A, the second conductive member 12B is connected to the first connector 85 of the second power storage device 10B, and the third conductive member 12C is connected to the first connector 85 of the third power storage device 10C. In this case, the first conductive member 12A is arranged on the bottom surface 105 of the first power storage device 10A, and the second conductive member 12B is arranged on the bottom surface 105 of the first power storage device 10A and the bottom surface 105 of the second power storage device 10B. Similarly, the third conductive member 12C is arranged on the bottom surface 105 of the first power storage device 10A, the bottom surface 105 of the second power storage device 10B, and the bottom surface 105 of the third power storage device 10C.

[0085] Each power storage device 10 is provided with, for example, a harness cover 210 (the outline of which is shown by a dashed line in FIG. 6) that covers the conductive member 12. The harness cover 210 allows, for example, the convex portion 101 and the convex portion 102 to be connected flush with each other.

[0086] In this way, when the energy storage devices 10 according to this embodiment are arranged so that the bottom surfaces 105 of the energy storage devices 10 are aligned, a passage for one or more external wirings is formed by the bottom surfaces 105 of the energy storage devices 10. By arranging one or more external wirings in this passage, the battery pack 1 can be configured without increasing the size in the height direction (Z-axis direction).

[0087] Furthermore, since the first connectors 85 of each of the multiple energy storage devices 10 provided in the battery pack 1 are located inside the end of the battery pack 1 in a plan view, even if a mobile body equipped with the battery pack 1 is involved in a collision accident or the like, the first connectors 85 are unlikely to be damaged.

[0088] Furthermore, when a power storage device row configured by arranging a plurality of power storage devices 10 in the X-axis direction is arranged in the Y-axis direction, the power storage device rows can be arranged close to each other as shown in FIG.

[0089] Specifically, in a plan view of the power storage device 10 according to the present embodiment, the first connector 85 is disposed in the center and the second connector 86 is disposed at an end. Therefore, for example, when two power storage devices 10 are arranged in the direction in which the first connectors 85 and second connectors 86 are aligned (Y-axis direction), the two power storage devices 10 are arranged so that the second connectors 86 of each are oriented in opposite directions.

[0090] 7, when a power storage device row including a first power storage device 10A and a second power storage device 10B is arranged next to a power storage device row including a fourth power storage device 10D and a fifth power storage device 10E, the two power storage device rows are arranged so that the second connectors 86 in each power storage device row face outward. This allows the two power storage device rows to be arranged close to each other, and also ensures that external wiring (conductive members 13) can be easily attached to and detached from the second connectors 86.

[0091] There is no particular limitation on the number of power storage devices 10 included in the battery pack 1. For example, the number of power storage devices 10 may be determined depending on the specifications of a mobile object in which the battery pack 1 is mounted. Although not shown in Figs. 6 and 7, the battery pack 1 may also include a housing that houses the multiple power storage devices 10 included in the battery pack 1.

[0092] (Variation) Next, a modification of the above embodiment will be described. In the above embodiment, the electrode terminals of energy storage elements 20 are bolt terminals having bolt portions, and the electrode terminals of energy storage elements 20 and bus bar 40 are connected to each other by inserting the bolt portions into through holes in bus bar 40 and fastening nuts to the bolt portions. However, in this modification, the electrode terminals of the energy storage elements do not have bolt portions, but are welded terminals that are connected (joined) to the bus bar by welding.

[0093] Fig. 8 is a cross-sectional view showing the configuration around lid body 300 of an energy storage device according to a modified example of the present embodiment. Fig. 9 is a plan view showing the configuration of an energy storage device according to a modified example of the present embodiment. As shown in Figs. 8 and 9, energy storage elements 20 (energy storage elements 20I to 20K in Fig. 8) in this modified example have positive terminal 24 and negative terminal 25 instead of positive terminal 22 and negative terminal 23 of energy storage elements 20 in the above-described embodiment. Furthermore, bus bar 42 in this modified example has terminal connection portion 42a and intermediate portion 42b.

[0094] The positive electrode terminal 24 and the negative electrode terminal 25 are welded terminals that are connected (joined) to the bus bar 42 by welding. Specifically, the positive electrode terminal 24 and the negative electrode terminal 25 are joined to the terminal connection portion 42a of the bus bar 42 by welding. For example, the positive electrode terminal 24 of the energy storage element 20I is joined to one terminal connection portion 42a of the bus bar 42 by welding, and the negative electrode terminal 25 of the energy storage element 20J is joined to the other terminal connection portion 42a of the bus bar 42 by welding.

[0095] That is, terminal connection portion 42a is a portion of bus bar 42 that is connected to the electrode terminal of energy storage element 20, and two terminal connection portions 42a that are connected to the electrode terminals of two different energy storage elements 20 are arranged on one bus bar 42. Furthermore, intermediate portion 42b is a portion that is arranged between the two terminal connection portions 42a. Note that intermediate portion 42b is a curved portion (hinge portion) that is provided so that bus bar 42 can expand and contract in the Y-axis direction and the Z-axis direction, and is provided so as to protrude from the two terminal connection portions 42a on the positive side in the Z-axis direction.

[0096] Furthermore, instead of the concave-convex structure of cover 100 in the above embodiment that is formed to accommodate multiple bolt terminals, cover 300 in this modification has convex portions 310 and concave portions 320. That is, convex portion 310 is a convex portion with a protruding outer surface that is disposed opposite bus bar 42, and concave portion 320 is a concave portion with a concave outer surface that is disposed adjacent to convex portion 310.

[0097] Here, the protrusion 310 has a first protrusion 311 arranged to face the electrode terminals of the energy storage elements 20 (in the figure, the positive electrode terminals 24 and negative electrode terminals 25 of the energy storage elements 20I to 20K). That is, the first protrusion 311 is arranged to face the terminal connection portion 42a of the bus bar 42. Specifically, the first protrusion 311 is arranged to cover the electrode terminals of the energy storage elements 20 and the upper side (the positive side in the Z-axis direction) of the terminal connection portion 42a, and has a shape (a rectangular shape in the figure) corresponding to the electrode terminals and terminal connection portion 42a in a top view (as viewed from the Z-axis direction). Furthermore, the first protrusion 311 is arranged to protrude further than a first recess 321 and a second recess 322 of a recess 320, which will be described later.

[0098] Furthermore, the protrusion 310 has a second protrusion 312 disposed opposite the intermediate portion 42b of the busbar 42. Specifically, the second protrusion 312 is disposed so as to cover the upper side (the positive side in the Z-axis direction) of the intermediate portion 42b, and has a shape (rectangular in the figure) corresponding to the intermediate portion 42b in a top view (as viewed from the Z-axis direction). Furthermore, the second protrusion 312 is formed to protrude further than the first protrusion 311.

[0099] The recess 320 has a first recess 321 disposed between two first protrusions 311 disposed opposite electrode terminals of two different energy storage elements 20 (for example, the negative electrode terminal 25 of energy storage element 20J and the positive electrode terminal 24 of energy storage element 20K). Specifically, the first recess 321 is disposed opposite the lid portion of the container 21 of the energy storage element 20 between two adjacent bus bars 42, and has a shape (rectangular in the figure) corresponding to the space between the two bus bars 42 in top view (as viewed from the Z-axis direction).

[0100] The recess 320 also has a second recess 322 arranged between two first protrusions 311 arranged opposite two electrode terminals of the same storage element 20 (for example, the positive terminal 24 and the negative terminal 25 of the storage element 20I).

[0101] Furthermore, recess 320 has a third recess 323 that is disposed opposite at least one of two terminal connection portions 42a and is recessed more than second protrusion 312. In this modification, third recess 323 is the above-described first protrusion 311. That is, first protrusion 311 is a protrusion relative to first recess 321 and second recess 322, but is a recess relative to second protrusion 312, and therefore can also be referred to as third recess 323.

[0102] 6, the conductive member 12 is disposed in the recess 320. 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.

[0103] Here, for example, when the conductive member 12 is arranged to extend in the X-axis direction (such as the second conductive member 12B or the third conductive member 12C in Figure 6), if the conductive member 12 is arranged in the first recess 321 and extends in the X-axis direction, the conductive member 12 will interfere with the second convex portion 312.

[0104] Specifically, it is possible to place the conductive member 12 in a groove-shaped portion formed by the first recess 321 and the second recess 322 that are arranged to face each other between the negative electrode terminal 25 of the energy storage element 20J and the positive electrode terminal 24 of the energy storage element 20K. However, for the conductive member 12 (the second conductive member 12B and the third conductive member 12C in FIG. 6 ) that is arranged to extend straight in the X-axis direction across adjacent energy storage devices 10, the second convex portion 312 and the conductive member 12 that are arranged to face each other between the positive electrode terminal 24 of the energy storage element 20J and the negative electrode terminal 25 of the energy storage element 20K are arranged to overlap in the Z-axis direction, which increases the height dimension of the entire unit.

[0105] In such a case, by arranging the conductive member 12 in the third recess 323 (and the second recess 322) on both sides in the X-axis direction, the conductive member 12 can be arranged parallel to the X-axis direction. Furthermore, as shown in Fig. 6, when the conductive member 12 is connected to the first connector 85, the conductive member 12 can also be arranged in the first recess 321. For example, the first conductive member 12A in Fig. 6 can also be arranged in the first recess 321 without any problems.

[0106] As for the second conductive member 12B and the third conductive member 12C in FIG. 6, another solution to the problem of interference in the Z-axis direction described above is possible, for example, by bending the conductive member 12 between the second recess 322 or adjacent energy storage devices 10, and positioning the conductive member 12 in the first recess 321 while avoiding the second protrusion 312.

[0107] The other configurations of this modified example are the same as those of the above embodiment, and therefore detailed description thereof will be omitted.

[0108] Although the power storage device 10 and the battery pack 1 according to the embodiment of the present invention have been described above, the present invention is not limited to the above embodiment. In other words, the embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims rather than the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0109] For example, in the above embodiment, the energy storage device 10 is provided with the harness plate 50 as a wiring holding member, but the wiring holding member does not have to be a member generally recognized as a "plate." For example, it may be a member with a frame structure that holds the internal wiring 65, the first connector 85, and the second connector 86.

[0110] Furthermore, the member electrically connected to the second connector 86 via the second wiring 65b does not have to be the thermistor 63. For example, an electrical component other than the thermistor 63 may be connected to the second wiring 65b, such as a liquid leakage sensor that detects liquid leakage from the energy storage elements 20, and the voltage applied via the second wiring 65b is smaller than the rated voltage of the energy storage device 10. Furthermore, an electrical device connected by one or more electric wires as the second wiring 65b, and that transmits a signal indicating the state of the energy storage device 10 to an external control device via the one or more electric wires and the second connector 86, may be connected to the one or more electric wires.

[0111] Furthermore, the number of components such as thermistors that are included in the power storage device 10 and electrically connected to the second connector 86 via the second wiring 65b is not limited to "2." The number of such components may be one or more. Furthermore, different types of components (for example, a thermistor and a liquid leakage sensor) may be electrically connected to the second connector 86 via the second wiring 65b.

[0112] Furthermore, although the first connector 85 and the second connector 86 each have a plurality of pins for connection to external wiring, there are no particular limitations on the shape and type of the first connector 85 and the second connector 86. For example, the first connector 85 or the second connector 86 may have a plurality of pin holes into which a plurality of pins of a connector at the end of the external wiring are inserted.

[0113] Furthermore, the shape of the energy storage elements 20 included in the energy storage device 10 does not need to be rectangular. The shape of the energy storage elements 20 may be, for example, a circle, an ellipse, an oval, a polygon other than a rectangle, or a shape that combines curves and straight lines in a plan view. In any case, the effects of the harness plate 50 according to the present embodiment, such as improved safety, as described above, can be achieved.

[0114] In the above embodiment, the electrode terminals (positive terminal 22 and negative terminal 23) of energy storage element 20 have bolt portions, and the bolt portions are inserted into through holes in bus bar 40 and nuts are fastened to the bolt portions, thereby connecting the electrode terminals of energy storage element 20 to bus bar 40. However, the electrode terminals of energy storage element 20 may not have bolt portions, and the electrode terminals may be connected (joined) to bus bar 40 by welding. Furthermore, the method of joining detection terminal 80 to the electrode terminal or bus bar 40 is not limited to fastening with nuts, and may be joined by welding.

[0115] Furthermore, configurations constructed by arbitrarily combining the components included in the above-described embodiments and their modifications are also included within the scope of the present invention.

[0116] The present invention can be realized not only as the power storage device 10 but also as a wiring holding member (harness plate 50 in the embodiment) included in the power storage device 10. [Industrial Applicability]

[0117] The present invention can be applied to an electricity storage device including an electricity storage element such as a lithium ion secondary battery. [Explanation of symbols]

[0118] 10. Energy storage device 10A first power storage device 10B Second power storage device 10C Third power storage device 10D Fourth power storage device 10E Fifth power storage device 12, 13 Conductive member 12A First conductive member 12B Second conductive member 12C Third conductive member 20, 20A~20K storage element 50 Harness Plate 51 First Regulatory Department 52 Second Regulatory Department 54 Wall 56a First area 56b Second area 65a First wiring 65b Second wiring 85 First Connector 85a, 86a connection ports 86 Second Connector 100, 300 lid 105 Lower part

Claims

1. A storage element; a first wiring electrically connected to the energy storage element; a flat rectangular wiring holding member that holds the first wiring; a first connector connected to the first wiring, the first connector being attached to the wiring holding member and allowing an external wiring to be attached and detached; the wiring holding member has a restricting portion which is a claw-shaped portion or a protrusion-shaped portion, and the restricting portion holds the first wiring; the first connector has a connection port arranged in a second direction intersecting a first direction in which the first connector is attached to the wiring holding member, The restricting portion is located in the second direction of the connection port when viewed from the first direction. Energy storage device.

2. the first wiring is arranged to bypass a second region of the wiring holding member on the connection port side of the first connector, The power storage device according to claim 1 .

3. the wiring holding member has a wall portion erected along at least a part of the periphery of the second region; The power storage device according to claim 2 .

4. the restricting portion restricts the first wirings to positions within the first region where they do not overlap with each other in an arrangement direction of the energy storage elements and the wiring holding member. The power storage device according to claim 1 .

5. The first wiring is connected to an electrode terminal of the energy storage element or a bus bar connected to the energy storage element. The electricity storage device according to any one of claims 1 to 4.

6. Further, a second wiring which is a wiring for a lower voltage than the first wiring and is held by the wiring holding member is provided. The electricity storage device according to any one of claims 1 to 5.

7. Further, a second connector connected to the second wiring is attached to the wiring holding member. The power storage device according to claim 6.

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