Power storage device

Abstract

An electrical storage device (1) comprising: an electrical storage unit (10) having an electrical storage element (11); a substrate (20) electrically connected to the electrical storage unit (10); a cover (120) arranged on one side of the substrate (200) in a first direction; and a cable (30) that has one end thereof electrically connected to the electrical storage unit (10) and is connected to a conductive member external to the electrically storage device (1). The cable (30) is arranged on one side, in the first direction, of at least part of the cover (120), in a state in which the cable (30) is connected to the external conductive member.

Description

[Technical Field]

[0001] The present invention relates to an energy storage device including an energy storage element and a substrate. [Background technology]

[0002] Conventionally, a power storage device including a power storage element and a substrate has been widely known. Patent Document 1 discloses a configuration (power storage device) including a battery pack that outputs a desired voltage by connecting a plurality of unit cells (power storage elements) in series, and a control substrate (substrate) that is housed in a substrate housing and controls the output voltage based on the voltage detection results of the plurality of unit cells. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-51190 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional energy storage device, the configuration allows work to be performed on the circuit board even when the connection between the energy storage device's cable and the external conductive member is not severed, so there is a need to improve safety.

[0005] An object of the present invention is to provide a power storage device that can improve safety. [Means for solving the problem]

[0006] An energy storage device according to one aspect of the present invention is an energy storage device including an energy storage unit having an energy storage element, and including a substrate electrically connected to the energy storage unit, a cover portion arranged on one side of the substrate in a first direction, and a cable having one end electrically connected to the energy storage unit and the other end connected to a conductive member external to the energy storage device, wherein the cable is arranged on one side of the first direction of at least a portion of the cover portion when the cable is connected to the external conductive member.

[0007] The present invention can be realized not only as an electricity storage device, but also as a cover portion or a combination of a cover portion and a cable. [Effects of the Invention]

[0008] According to the electricity storage device of the present invention, it is possible to improve safety. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing the configuration of the electricity storage device according to the embodiment when it is separated into an electricity storage unit and a substrate unit. [Figure 3] FIG. 3 is an exploded perspective view illustrating each component of the electricity storage unit according to the embodiment. [Figure 4] FIG. 4 is an exploded perspective view showing each component of the substrate unit according to the embodiment. [Figure 5] FIG. 5 is a perspective view, a cross-sectional view, and a side view showing the configuration of the substrate unit according to the embodiment. [Figure 6] FIG. 6 is a cross-sectional view showing the configuration of the substrate unit according to the embodiment. [Figure 7] FIG. 7 is a perspective view, a front view, and a side view showing the configuration of the board unit according to the embodiment with the cover portion open. [Figure 8]FIG. 8 is a perspective view and a cross-sectional view showing the configuration in a state where the board holding portion is rotated with respect to the board unit mounting portion of the exterior body supporting body according to the embodiment. [Figure 9] FIG. 9 is a perspective view showing a configuration in which a cable is placed in a cable placement section of a board unit according to an embodiment. [Figure 10] FIG. 10 is a front view showing a cable connection configuration of the electricity storage device according to the embodiment. [Figure 11] FIG. 11 is a perspective view showing the configuration of a cable placement portion of a cover according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] In an electric power storage device including a circuit board, when working on the circuit board, it is desirable to disconnect the cable of the electric power storage device from an external conductive member (such as a cable of an adjacent electric power storage device) before working on the circuit board in order to improve safety. However, in the conventional electric power storage device described above, the circuit board can be worked on even without disconnecting the connection, so there is a risk that the circuit board will be worked on without disconnecting the connection. Thus, the inventors of the present application have found that there is a need to further improve safety in the conventional electric power storage device described above.

[0011] An energy storage device according to one aspect of the present invention is an energy storage device including an energy storage unit having an energy storage element, and including a substrate electrically connected to the energy storage unit, a cover portion arranged on one side of the substrate in a first direction, and a cable having one end electrically connected to the energy storage unit and the other end connected to a conductive member external to the energy storage device, wherein the cable is arranged on one side of the first direction of at least a portion of the cover portion when the cable is connected to the external conductive member.

[0012] According to this, in the power storage device, when the cable is connected to an external conductive member, the cable is arranged on one side in the first direction of at least a portion of the cover portion that is arranged on one side in the first direction of the board. In this way, the cover portion is arranged outside the board, and when the cable is connected to an external conductive member (such as a cable of an adjacent power storage device), the cable is arranged outside at least a portion of the cover portion. As a result, the cable cannot be opened unless it is removed from the external conductive member and moved, making it impossible to perform work on the board. Therefore, the connection between the cable of the power storage device and the external conductive member is cut off before work on the board, thereby improving safety.

[0013] The storage unit may be arranged on the other side of the cover portion in the first direction, and the cable may protrude from the storage unit and extend to one side of the first direction, and may be arranged on one side of at least a portion of the cover portion in the first direction and connected to the external conductive member.

[0014] According to this, in the energy storage device, the cable protrudes from the energy storage unit and extends to one side in the first direction, crosses the cover portion to one side in the first direction, and is disposed on at least a portion of the cover portion to one side in the first direction and connected to an external conductive member. In this manner, the cable is disposed so as to wrap around (embrace) at least a portion of the cover portion. This makes it possible to prevent the cover portion from opening when the cable is connected to an external conductive member, thereby improving safety.

[0015] The cover portion may have a first recess recessed on one side in a second direction intersecting the first direction, and the cable may be disposed in the first recess.

[0016] According to this, by arranging the cable in the first recess that is recessed on one side of the cover in the second direction, the cable can be positioned relative to the cover, and the cable can be stably arranged on one side of at least a portion of the cover in the first direction. This makes it possible to prevent the cover from opening when the cable is connected to an external conductive member, thereby improving safety.

[0017] The cover portion may have a second recess recessed to one side of the first direction, and a third recess recessed from the second recess to one side or the other of a second direction intersecting the first direction, and the cable may be arranged in the third recess.

[0018] According to this, the cover portion is formed with a second recess recessed to one side in the first direction and a third recess recessed from the second recess to one side or the other in the second direction, and by arranging the cable in the third recess, a part of the cover portion is arranged on the other side of the cable in the first direction. This makes it possible to prevent the cover portion from opening when the cable is connected to an external conductive member, thereby improving safety.

[0019] The cover portion has a regulating portion that regulates movement of the cable, and by positioning the cable on one side of the regulating portion in a second direction that intersects with the first direction, the regulating portion may regulate movement of the cable to the other side of the second direction.

[0020] According to this, the cover portion restricts movement of the cable to the other side in the second direction using the restricting portion, thereby preventing the cable from moving from one side of the cover portion in the first direction. This prevents the cover portion from opening when the cable is connected to an external conductive member, thereby improving safety.

[0021] The apparatus may further comprise a substrate holding portion that holds the substrate and to which the cover portion is attached, and the cover portion may be rotatably attached to the substrate holding portion.

[0022] According to this, since the cover is rotatably attached to the board holding part, in order to open the cover and remove the board, it is necessary to rotate the cover with respect to the board holding part. However, if at least a portion of the cover is disposed on the other side of the cable in the first direction, the cover cannot be rotated. This improves safety because the cover cannot be opened unless the cable is detached from the external conductive member and moved.

[0023] Hereinafter, with reference to the drawings, a description will be given of an energy storage device according to an embodiment of the present invention (including modifications thereof). The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present invention. In each drawing, dimensions and the like are not strictly illustrated.

[0024] In the following description and drawings, the X-axis direction is defined as the direction in which a pair of electrode terminals (positive and negative) 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 unit face each other. The Y-axis direction is defined as the direction in which 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 direction in which the short side surfaces of the exterior body of the energy storage unit face each other, the direction in which the energy storage unit and the substrate unit face each other, or the direction in which the substrate holding portion, substrate, and cover of the substrate unit are aligned. The Z-axis direction is defined as the direction in which the exterior body support body and the exterior body lid of the energy storage unit are aligned, the direction in which the energy storage element and the bus bar are aligned, the direction in which the container body and the lid of the energy storage element 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.

[0025] In the following description, the positive X-axis direction refers to the direction of the X-axis arrow, and the negative X-axis direction refers to the direction opposite to the positive X-axis direction. The same applies to the Y-axis and Z-axis directions. Hereinafter, the Y-axis direction will also be referred to as the first direction, the negative Y-axis direction will also be referred to as one side of the first direction, and the positive Y-axis direction will also be referred to as the other side of the first direction. The Z-axis direction will also be referred to as the second direction, the negative Z-axis direction will also be referred to as one side of the second direction, and the positive Z-axis direction will also be referred to as the other side of the second direction. Expressions indicating relative directions or orientations, such as "parallel" and "orthogonal," may also include cases where the directions or orientations are not strictly those of the same kind. "Two directions being orthogonal" does not only mean that the two directions are completely orthogonal, but also means that the two directions are substantially orthogonal, i.e., there is a difference of a few percent.

[0026] (Embodiment) [1 General Description of the Energy Storage Device 1] First, the configuration of the energy storage device 1 according to the present embodiment will be described. Fig. 1 is a perspective view showing the appearance of the energy storage device 1 according to the present embodiment. Fig. 2 is a perspective view showing the configuration of the energy storage device 1 according to the present embodiment when separated into an energy storage unit 10 and a substrate unit 20. Fig. 3 is an exploded perspective view showing each component of the energy storage unit 10 according to the present embodiment when disassembled.

[0027] The power storage device 1 is a device that can be charged with electricity from an external source and can discharge electricity to an external source, and in this embodiment, has a substantially rectangular parallelepiped shape. The power storage device 1 is used for power storage purposes, power supply purposes, etc. Specifically, the power storage device 1 is used as a battery for driving or starting the engine of a moving object such as an automobile, a motorcycle, a personal watercraft, a ship, a snowmobile, agricultural machinery, construction machinery, or a railway vehicle for an electric railway. Examples of the automobile include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a gasoline-powered automobile. Examples of the railway vehicle for an electric railway include a train, a monorail, and a linear motor car. The power storage device 1 can also be used as a stationary battery for home use or for a power generator, etc.

[0028] As shown in these figures, the energy storage device 1 includes an energy storage unit 10 and a board unit 20 attached to the energy storage unit 10. First, the configuration of the energy storage unit 10 will be described in detail. The energy storage unit 10 is a battery module (battery assembly) having a generally rectangular parallelepiped shape that is elongated in the Y-axis direction. Specifically, the energy storage unit 10 includes a plurality of energy storage elements 11, a bus bar frame 12, a plurality of bus bars 13, and an exterior body 18 that houses these and is made up of an exterior body main body 14, an exterior body support 15, and an exterior body lid 17. A cable 30 is connected to the energy storage unit 10. The energy storage unit 10 may include restraining members (end plates, side plates, etc.) that restrain the plurality of energy storage elements 11.

[0029] The energy storage element 11 is a secondary battery (single cell) that can charge and discharge electricity, and more specifically, is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The energy storage element 11 has a flat rectangular parallelepiped (rectangular) shape, and in this embodiment, 16 energy storage elements 11 are arranged side by side in the Y-axis direction. The shape, arrangement position, number, etc. of the energy storage elements 11 are not particularly limited. The energy storage element 11 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor. The energy storage element 11 may not be a secondary battery, but may be a primary battery that allows stored electricity to be used without the user having to charge it. The energy storage element 11 may be a battery using a solid electrolyte. The energy storage element 11 may also be a pouch-type energy storage element.

[0030] Specifically, the energy storage element 11 includes a metal container 11a, and a positive electrode terminal 11b and a negative electrode terminal 11c, which are metal electrode terminals, are provided on the lid of the container 11a. A spacer 11d is disposed between adjacent energy storage elements 11. The lid of the container 11a may be provided with a liquid injection section for injecting an electrolyte solution, and a gas exhaust valve for releasing the pressure by discharging gas when the pressure inside the container 11a increases. Inside the container 11a, 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), etc. are disposed, and an electrolyte solution (nonaqueous electrolyte) etc. is sealed inside, but a detailed description thereof will be omitted.

[0031] The positive electrode terminal 11b and the negative electrode terminal 11c are disposed so as to protrude upward (in the positive direction of the Z axis) from the lid of the container 11a. The outermost positive electrode terminals 11b and negative electrode terminals 11c of the multiple energy storage elements 11 are connected to a cable 30, thereby enabling the energy storage device 1 to charge with electricity from the outside and discharge electricity to the outside. The cable 30 is an electric wire (also referred to as a main circuit cable, power cable, electric power cable, power line, or power line) through which a current (also referred to as a charge / discharge current or main current) for charging and discharging the energy storage device 1 (energy storage elements 11) flows, and includes a positive electrode power cable 31 on the positive electrode side and a negative electrode power cable 32 on the negative electrode side. In other words, the positive power cable 31 of the cable 30 is connected to the positive terminal 11b of the storage element 11 at the end of the multiple storage elements 11 in the positive direction of the Y axis, and the negative power cable 32 of the cable 30 is connected to the negative terminal 11c of the storage element 11 at the end of the multiple storage elements 11 in the negative direction of the Y axis.

[0032] The busbar frame 12 is a flat, rectangular member that electrically insulates the busbars 13 from other members and can position the busbars 13. The busbar frame 12 is formed of an insulating member, such as polycarbonate (PC), polypropylene (PP), or polyethylene (PE), similar to the materials listed for the substrate accommodating portion 100 of the substrate unit 20, which will be described later. Specifically, the busbar frame 12 is placed above the plurality of energy storage elements 11 and positioned relative to the plurality of energy storage elements 11. The busbars 13 are placed and positioned on the busbar frame 12. As a result, the busbars 13 are positioned relative to the plurality of energy storage elements 11 and are joined to the positive terminals 11b and negative terminals 11c of the plurality of energy storage elements 11. The busbar frame 12 also functions as an inner lid for the exterior body 18, reinforcing the exterior body main body 14.

[0033] Busbar 13 is a rectangular plate-like member that is disposed on multiple energy storage elements 11 (on busbar frame 12) and electrically connects electrode terminals of multiple energy storage elements 11 together. Busbar 13 is formed of a metal such as aluminum, aluminum alloy, copper, copper alloy, or stainless steel. In this embodiment, busbar 13 connects positive electrode terminal 11b and negative electrode terminal 11c of adjacent energy storage elements 11, thereby connecting 16 energy storage elements 11 in series. The manner in which energy storage elements 11 are connected is not limited to the above, and any combination of series connection and parallel connection may be used.

[0034] A cable 13a is connected to the bus bar 13 or the electrode terminal of the energy storage element 11. The cable 13a is an electric wire (also referred to as a communication cable, control cable, communication line, or control line) for measuring the voltage or temperature of the energy storage element 11 or for balancing the voltage between the energy storage elements 11. A thermistor (not shown) for measuring the temperature of the energy storage element 11 is disposed on the bus bar 13 or the electrode terminal of the energy storage element 11, but a description thereof will be omitted. A connector 13b is connected to the end of the cable 13a facing the negative Y-axis direction. The connector 13b is a connector connected to a board 200 of the board unit 20, which will be described later. In other words, the cable 13a transmits information such as the voltage and temperature of the energy storage element 11 to the board 200 of the board unit 20 via the connector 13b. The cable 13a also has the function of discharging the energy storage element 11 with a high voltage under the control of the board 200, thereby balancing the voltage between the energy storage elements 11.

[0035] Exterior body 18 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of energy storage unit 10. In other words, exterior body 18 is disposed outside energy storage elements 11, etc., fixes energy storage elements 11, etc. in predetermined positions, and protects them from impacts and the like. Exterior body 18 has exterior body main body 14 that constitutes the main body of exterior body 18, exterior body support 15 that supports exterior body main body 14, and exterior body lid 17 that constitutes the lid (outer lid) of exterior body 18.

[0036] The exterior body main body 14 is a rectangular cylindrical housing with a bottom and an opening formed on the top surface. The exterior body main body 14 is made of insulating materials such as PC, PP, PE, etc., similar to the materials listed for the board accommodating section 100 of the board unit 20 described below. The exterior body support 15 and the exterior body lid 17 are members that protect (reinforce) the exterior body main body 14. The exterior body support 15 and the exterior body lid 17 are made of metal members such as stainless steel, aluminum, aluminum alloy, iron, and plated steel sheet. The exterior body support 15 and the exterior body lid 17 may be made of members made of the same material or different materials.

[0037] The exterior body support 15 is a member that supports the exterior body main body 14 from below (in the negative Z-axis direction) and has a bottom 15a, a board unit mounting portion 16, and connection portions 15b and 15c. The bottom 15a is a flat, rectangular portion that constitutes the bottom of the energy storage device 1 and is parallel to the XY plane and extends in the Y-axis direction. The bottom 15a is disposed below the exterior body main body 14. The board unit mounting portion 16 is a flat, rectangular portion that stands in the positive Z-axis direction from the end of the bottom 15a on the negative Y-axis side. The board unit 20 is attached to the board unit mounting portion 16. The connection portion 15b is disposed at the end of the board unit mounting portion 16 on the positive Z-axis side, protrudes in the negative Y-axis direction, and is connected to the exterior body lid 17. The connection portion 15c stands in the positive Z-axis direction from the end of the bottom 15a on the positive Y-axis side, protrudes in the positive Y-axis direction, and is connected to the exterior body lid 17.

[0038] Exterior body cover 17 is a member arranged to cover the opening on the top surface of exterior body main body 14, and has top surface 17a and connection portions 17b and 17c. Top surface 17a is a flat, rectangular portion that constitutes the top surface of power storage device 1 and is parallel to the XY plane and extends in the Y-axis direction, and is arranged above exterior body main body 14. Connection portion 17b is arranged at the end of top surface 17a on the negative Y-axis side, extends in the negative Z-axis direction, and protrudes in the negative Y-axis direction, and is connected to connection portion 15b of exterior body support body 15. Connection portion 17c is a portion that extends in the negative Z-axis direction from the end of top surface 17a on the positive Y-axis side, protrudes in the positive Y-axis direction, and is connected to connection portion 15c of exterior body support body 15. In this way, the exterior body support 15 and the exterior body lid 17 are configured to sandwich the exterior body main body 14 from above and below, and are fixed by connecting the connection parts 15b and 15c to the connection parts 17b and 17c with screws or the like.

[0039] The board unit 20 is a device capable of monitoring the state of the energy storage elements 11 included in the energy storage unit 10 and controlling the energy storage elements 11. In the present embodiment, the board unit 20 is a flat rectangular member attached to an end of the energy storage unit 10 in the longitudinal direction, i.e., to a side surface of the energy storage unit 10 on the negative Y-axis direction side. Specifically, the board unit 20 is rotatably attached to a board unit attachment portion 16 provided on an exterior body support 15 included in an exterior body 18 of the energy storage unit 10. The configuration of this board unit 20 will be described in detail below.

[0040] [2. Description of the configuration of the board unit 20] FIG. 4 is an exploded perspective view showing each component of the board unit 20 according to the present embodiment when disassembled. FIG. 5 is a perspective view, a cross-sectional view, and a side view showing the configuration of the board unit 20 according to the present embodiment. Specifically, FIG. 5(a) is a perspective view showing the configuration of the board unit 20 shown in FIG. 2 in a state where it is attached to the board unit attachment portion 16 of the exterior body support 15. FIG. 5(b) is a cross-sectional view showing the attachment configuration between the board unit attachment portion 16 and the board holding portion 110. FIG. 5(c) is a side view showing the attachment configuration between the board holding portion 110 and the cover portion 120. FIG. 6 is a cross-sectional view showing the configuration of the board unit 20 according to the present embodiment. Specifically, FIG. 6 is a cross-sectional view showing the configuration when the board unit 20 of FIG. 5(a) is cut along the VI-VI cross section.

[0041] Fig. 7 is a perspective view, a front view, and a side view showing the configuration of the board unit 20 according to this embodiment with the cover portion 120 in an open state. Specifically, Fig. 7(a) is a perspective view showing the configuration of the board unit 20 shown in Fig. 5 with the cover portion 120 rotated relative to the board holding portion 110. Fig. 7(b) is a partial front view showing the configuration of the through-hole 230 of the board 200 and the fixing portion 116 of the board holding portion 110 as viewed from the negative Y-axis direction. Fig. 7(c) is a partial side view showing the mounting configuration of the board holding portion 110 and the cover portion 120, and corresponds to Fig. 5(c).

[0042] Fig. 8 is a perspective view and a cross-sectional view showing the configuration in a state where the board holding part 110 has been rotated relative to the board unit mounting part 16 of the exterior body support body 15 according to this embodiment. Specifically, (a) of Fig. 8 is a perspective view showing the configuration in a state where the board holding part 110 has been rotated as far as possible relative to the board unit mounting part 16 (until the rotation of the board holding part 110 is restricted). (b) of Fig. 8 is a cross-sectional view showing the mounting configuration between the board unit mounting part 16 and the board holding part 110, and corresponds to (b) of Fig. 5.

[0043] As shown in these figures, the substrate unit 20 includes a substrate accommodating section 100 and a substrate 200 accommodated within the substrate accommodating section 100. In other words, the substrate accommodating section 100 accommodates the substrate 200, fixes it in a predetermined position, and protects the substrate 200 from impacts and the like. The substrate accommodating section 100 is formed from an insulating material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin, or a composite material thereof, or a metal with an insulating coating. The substrate accommodating section 100 prevents the substrate 200 from coming into contact with external metal components and the like. As long as the electrical insulation of the substrate 200 is maintained, the substrate accommodating portion 100 may be formed of a conductive material such as metal.

[0044] The substrate accommodating section 100 is rotatably attached in an upright position to a side surface (substrate unit mounting section 16 of exterior body support 15) in the horizontal direction (specifically, in the negative Y-axis direction (one side in the first direction)) of the exterior body 18 of the energy storage unit 10. The substrate accommodating section 100 has a substrate holding section 110 that holds the substrate 200, and a cover section 120 that is attached to the substrate holding section 110. In other words, the substrate 200 and the substrate accommodating section 100 (substrate holding section 110 and cover section 120) are arranged in the negative Y-axis direction (one side in the first direction) of the energy storage unit 10 in an upright position. In other words, the energy storage unit 10 is arranged in the positive Y-axis direction (the other side in the first direction) of the substrate 200 and the substrate accommodating section 100 (substrate holding section 110 and cover section 120). The configurations of the substrate 200, and the substrate holding part 110 and cover part 120 of the substrate accommodation part 100 will be described in detail below.

[0045] 2.1 Description of the substrate 200 The board 200 is a circuit board (monitoring board) electrically connected to the energy storage unit 10. Specifically, the board 200 is electrically connected to the energy storage element 11 via the above-mentioned cable 13a and connector 13b, thereby acquiring information such as the voltage and temperature of the energy storage element 11 and monitoring the state of charge and discharge of the energy storage element 11. The board 200 also functions as a control board that discharges the energy storage element 11 using the cable 13a to balance the voltage between the energy storage elements 11. Components (not shown) are mounted on both the surface of the board 200 facing the positive direction of the Y axis and the surface of the board facing the negative direction of the Y axis. The board 200 may be configured to only monitor the state of the energy storage element 11 without controlling the energy storage element 11.

[0046] More specifically, the substrate 200 has connectors 210 and 220 and a through hole 230. The connectors 210 and 220 are arranged at an end of the outer periphery of the substrate 200 that is different from the negative Z-axis side (the side on which an axis about which a cover unit 120, described later, rotates relative to the substrate holding unit 110 is located). In this embodiment, two connectors 210 are arranged side by side in the X-axis direction on both sides of the end of the substrate 200 on the positive Z-axis side, and two connectors 220 are arranged side by side in the Z-axis direction on the negative Z-axis side of the end of the substrate 200 on the negative X-axis side.

[0047] Connector 210 is disposed on the surface of substrate 200 on the negative Y-axis side with its socket facing the positive Z-axis direction (parallel to the surface of substrate 200), and is configured so that connector 13b described above can be attached to and detached from the socket (see FIG. 7(a)). Connector 220 is disposed on the surface of substrate 200 on the negative Y-axis side with its socket facing the negative Y-axis direction, and is configured so that an external connector (not shown) can be attached and detached to and from the socket via opening 124 of cover 120 (see FIGS. 5(a) and 7(a)). Opening 124 is a rectangular through-hole formed on the negative Z-axis side of the end of cover 120 on the negative X-axis direction side, at a position corresponding to connector 220.

[0048] The through holes 230 are rectangular through holes that penetrate the substrate 200 in the Y-axis direction. In this embodiment, a plurality of (six) through holes 230 are arranged on the outer periphery of the substrate 200. That is, three through holes 230 are arranged side by side in the X-axis direction at the end of the substrate 200 on the positive side of the Z-axis, and three through holes 230 are arranged side by side in the X-axis direction at the end of the substrate 200 on the negative side of the Z-axis. Specifically, as shown in FIG. 7(b), the through holes 230 are formed so that their length is longer in the X-axis direction than in the Z-axis direction, and the fixing portion 116 of the substrate holding unit 110 is inserted (press-fitted) into the through holes 230. A detailed description of the configuration in which the fixing portion 116 is inserted (press-fitted) into the through holes 230 will be given later.

[0049] [2.2 Explanation of the substrate holding part 110 and the cover part 120] The board holding part 110 is a box-shaped member that is disposed between the energy storage unit 10 and the board 200, is open in the negative Y-axis direction, and is open in the positive Z-axis direction, and holds the board 200. As described above, the board holding part 110 is rotatably attached to the board unit attachment part 16 of the exterior body support 15 of the energy storage unit 10 in an upright position. The board holding part 110 has a holder main body 111, a grip part 115 having a first board-side attachment part 112, a first holding part-side attachment part 113, an upper attachment part 114, and a fixing part 116.

[0050] The cover unit 120 is disposed in the negative Y-axis direction of the substrate 200 (one side in the first direction) and is a member that serves as a lid that closes the opening of the substrate holding unit 110, and is attached to the substrate holding unit 110 so as to be freely opened and closed. The cover unit 120, together with the substrate holding unit 110, serves as a cover that protects the substrate 200 from dust or mechanical or electrical damage. The cover unit 120 serves as a cover for the access surface during work such as maintenance of the substrate 200. The cover unit 120 serves as a cover for the surface on which the connectors 210 and 220 on the substrate 200 are inserted and removed, or where electrical measurement work is performed during work such as maintenance. Specifically, the cover unit 120 is attached to the substrate holding unit 110 so as to be rotatable. In addition to the opening 124 described above, the cover part 120 has a cover part main body 121, a first cover side mounting part 122, a second cover side mounting part 123, a cable placement part 125, and a board regulating part 126 (see Figures 6, 7, etc.).

[0051] [2.2.1 Description of the holding part body 111 and the cover part body 121] The holder main body 111 is a portion that constitutes the main body of the substrate holder 110 and has a first holder wall 111a and a second holder wall 111b. The first holder wall 111a is a flat, rectangular portion that is arranged between the substrate unit mounting portion 16 and the substrate 200 and is parallel to the XZ plane. The second holder wall 111b is a flat, rectangular portion that protrudes from the outer periphery of the first holder wall 111a in the negative Y-axis direction and surrounds the periphery of the substrate 200. In this embodiment, the second holder wall 111b is arranged so as to surround both sides of the substrate 200 in the X-axis direction, the negative Z-axis side, and a portion of the positive Z-axis side.

[0052] The cover unit main body 121 is a portion that constitutes the main body of the cover unit 120 and has a first cover wall portion 121a and a second cover wall portion 121b. The first cover wall portion 121a is a flat, rectangular portion parallel to the XZ plane and is disposed at a position where the substrate 200 is sandwiched between the first cover wall portion 121a and the first holding unit wall portion 111a of the holding unit main body 111. The second cover wall portion 121b is a flat, substantially rectangular portion that protrudes from the outer periphery of the first cover wall portion 121a in the positive direction of the Y axis and surrounds the periphery of the substrate 200 and the periphery of the second holding unit wall portion 111b. In this embodiment, the second cover wall portion 121b is disposed so as to surround both sides in the X axis direction and the positive direction of the Z axis of the substrate 200 and the second holding unit wall portion 111b.

[0053] [2.2.2 Description of first board side mounting portion 112] The first board-side mounting portion 112 is disposed on the board holding portion 110 on the side of the bottom 15a of the energy storage device 1 (the negative Z-axis direction side), and is rotatably mounted to the energy storage unit 10. Specifically, the two first board-side mounting portions 112 are disposed on the negative Z-axis direction side and at both ends in the X-axis direction of the board holding portion 110. The board unit mounting portion 16 of the energy storage unit 10 has first power-storage-side mounting portions 16a to which the first board-side mounting portions 112 are attached. In other words, the two first power-storage-side mounting portions 16a are disposed at positions corresponding to the two first board-side mounting portions 112 on the negative Z-axis direction side and at both ends in the X-axis direction of the board unit mounting portion 16.

[0054] Specifically, as shown in FIGS. 5A and 5B, the first board-side mounting portion 112 is a columnar shaft extending in the X-axis direction and has a circular or cross-shaped (+-shaped or X-shaped) cross section when cut in the YZ plane. The first power-storage-side mounting portion 16a is a portion that extends in the Z-axis positive direction from the end of the bottom portion 15a of the exterior body support 15 on the Y-axis negative side, is bent in the Y-axis negative direction, and is also bent in the Z-axis negative direction. That is, the first power-storage-side mounting portion 16a has a shape in which the surface on the Z-axis positive side protrudes in the Z-axis positive direction and the surface on the Z-axis negative side is recessed in the Z-axis positive direction. In other words, the first power-storage-side mounting portion 16a has an inverted U-shape when viewed from the X-axis direction, with the portion on the Z-axis negative side open and recessed in the Z-axis positive direction.

[0055] The first board-side mounting portion 112 is inserted into the recessed portion of this first power-storage-side mounting portion 16a. In other words, the first power-storage-side mounting portion 16a is arranged on both sides in the Y-axis direction and on the positive Z-axis direction side of the first board-side mounting portion 112 so as to surround both sides in the Y-axis direction and the positive Z-axis direction side of the first board-side mounting portion 112. As a result, the first board-side mounting portion 112 is arranged closer to the bottom 15a of the power storage device 1 (the negative Z-axis side) than the first power-storage-side mounting portion 16a.

[0056] 8, the first board-side mounting portion 112 is configured to be rotatable (rotatable) with respect to the first power-storage-side mounting portion 16a. That is, when the first board-side mounting portion 112 rotates with respect to the first power-storage-side mounting portion 16a, the board holding portion 110 rotates with respect to the board unit mounting portion 16 about the first board-side mounting portion 112 as an axis. When an inclined surface 115a of a gripping portion 115 (described later) abuts against a wall portion 16b provided at the bottom of the board unit mounting portion 16, the rotation of the board holding portion 110 with respect to the board unit mounting portion 16 is restricted. The wall portion 16b is a flat, rectangular portion extending in the negative Z-axis direction from between the two first storage side mounting portions 16a at the end of the bottom portion 15a of the exterior body support 15 on the negative Y-axis side, and is used to mount the storage device 1 on a shelf 2 (see Figure 10) of a rack (a component that houses multiple storage devices 1) or the like.

[0057] As a result, rotation of the board holding portion 110 is restricted in a state where the board holding portion 110 has rotated approximately 45° relative to the board unit mounting portion 16, and in this state, the board holding portion 110 can be removed from the board unit mounting portion 16. Specifically, while rotating the board holding portion 110 relative to the board unit mounting portion 16, a second board side mounting portion 114a of the upper mounting portion 114 (described later) is removed from a second power storage side mounting portion 16c of the board unit mounting portion 16 (described later). After rotating the board holding portion 110 approximately 45° relative to the board unit mounting portion 16, the board holding portion 110 can be removed from the board unit mounting portion 16 by moving the board holding portion 110 in the negative direction of the Z axis.

[0058] When attaching the board holding part 110 to the board unit mounting part 16, the first board-side mounting part 112 is inserted into the first power-storage-side mounting part 16a from the negative direction of the Z axis with the board holding part 110 tilted at approximately 45° with respect to the board unit mounting part 16. The board holding part 110 is rotated so as to approach the board unit mounting part 16, and the second board-side mounting part 114a of the upper mounting part 114 is attached to the second power-storage-side mounting part 16c of the board unit mounting part 16. In this manner, the board holding part 110 can be attached to or detached from the power storage unit 10 (the board unit 20 can be attached or detached). The angle at which the board holding part 110 is restricted with respect to the board unit mounting part 16 is not limited to 45° and may be any angle as long as the angle allows the board holding part 110 to be attached to or detached from the board unit mounting part 16.

[0059] [2.2.3 Explanation of the first holding portion side mounting portion 113 and the first cover side mounting portion 122] The first holding unit side attachment portion 113 is disposed on the bottom 15a side (negative Z-axis direction side) of the energy storage device 1 in the substrate holding unit 110, and is a portion to which the cover unit 120 is attached. Specifically, the two first holding unit side attachment portions 113 are disposed on the negative Z-axis direction side of the substrate holding unit 110 and outside the first substrate side attachment portions 112 at both ends in the X-axis direction. The first cover side attachment portion 122 of the cover unit 120 is attached to the first holding unit side attachment portion 113.

[0060] The first cover side attachment portion 122 is disposed on the bottom 15a side (negative Z-axis direction side) of the power storage device 1 in the cover portion 120, and is attached rotatably to the substrate holding portion 110. Specifically, the two first cover side attachment portions 122 are disposed on the negative Z-axis direction side of the cover portion 120 and at both end portions in the X-axis direction, at positions corresponding to the two first holding portion side attachment portions 113. In other words, the first cover side attachment portions 122 are disposed at the end portions on the negative Z-axis direction side of the side wall portions on both sides in the X-axis direction of the second cover wall portion 121b.

[0061] Specifically, as shown in FIGS. 5A and 5C, the first holding unit side mounting portion 113 is a cylindrical shaft extending in the X-axis direction and has a circular shape when viewed in the X-axis direction. The first cover side mounting portion 122 has an inverted C shape when viewed in the X-axis direction, with an opening on the negative Y-axis side and a recess in the positive Y-axis direction. The first holding unit side mounting portion 113 is inserted into the recessed portion of the first cover side mounting portion 122. In other words, the first cover side mounting portion 122 is disposed on both sides of the first holding unit side mounting portion 113 in the Z-axis direction and on the positive Y-axis side so as to surround both sides of the first holding unit side mounting portion 113 in the Z-axis direction and on the positive Y-axis side. As a result, the first cover side mounting portion 122 is disposed closer to the first holding unit side mounting portion 113 in the direction from the cover unit 120 toward the substrate holding unit 110 (the positive Y-axis direction).

[0062] 7(a) and 7(c), the first cover side attachment portion 122 is configured to be rotatable (rotatable) relative to the first holding part side attachment portion 113. In other words, when the first cover side attachment portion 122 rotates relative to the first holding part side attachment portion 113, the cover portion 120 rotates relative to the board holding part 110 around the first holding part side attachment portion 113 as an axis. A rotation restricting portion 127 (see FIG. 7(c)) provided near the first cover side attachment portion 122 comes into contact with the board holding part 110, thereby restricting the rotation of the cover portion 120 relative to the board holding part 110. In other words, the rotation control portion 127 is a planar portion arranged on the lower end surface of the first cover wall portion 121a of the cover portion main body 121, and by abutting against the surface on the negative Y-axis side of the lower portion of the substrate holding portion 110 (such as the gripping portion 115), it controls the rotation of the cover portion 120 relative to the substrate holding portion 110.

[0063] As a result, in the present embodiment, rotation of the cover portion 120 is restricted when the cover portion 120 is rotated 90° relative to the substrate holding portion 110, and in this state, the substrate 200 can be attached to and detached from the substrate holding portion 110. Specifically, while rotating the cover portion 120 relative to the substrate holding portion 110, the second cover side attachment portion 123, which will be described later, is removed from the second holding portion side attachment portion 114b of the upper attachment portion 114. After the cover portion 120 has been rotated approximately 90° relative to the substrate holding portion 110, the substrate 200 can be attached to and detached from the substrate holding portion 110. As a result, the substrate 200 can be attached to and detached from the substrate holding portion 110 without removing the cover portion 120 from the substrate holding portion 110.

[0064] In this state, the cover portion 120 can be removed from the substrate holding portion 110 by moving the cover portion 120 in the positive direction of the Z axis. When the cover portion 120 is removed from the substrate holding portion 110, the cover portion 120 can be attached to the substrate holding portion 110 by inserting the first holder-side attachment portion 113 into the first cover-side attachment portion 122 from the negative direction of the Z axis while the cover portion 120 is perpendicular to the substrate holding portion 110. When the cover portion 120 is rotated so as to approach the substrate holding portion 110, the second cover-side attachment portion 123 can be attached to the second holder-side attachment portion 114b. In this manner, the cover portion 120 can be attached to and detached from the substrate holding portion 110. The angle at which the cover portion 120 is restricted relative to the substrate holding portion 110 is not limited to 90° and may be any angle, such as 90°±10°, as long as the angle allows the cover portion 120 to be attached to and detached from the substrate holding portion 110. If the angle is greater than 90°, the substrate 200 can be easily replaced, and if the angle is less than 90°, the substrate 200 can be prevented from falling.

[0065] [2.2.4 Explanation of the upper mounting portion 114 and the second cover mounting portion 123] The upper attachment portion 114 is disposed in the center of the substrate holding portion 110 in the X-axis direction on the positive side of the Z-axis (opposite the bottom portion 15a), and is attached so as to be able to engage with the power storage unit 10 and the cover portion 120. Specifically, the upper attachment portion 114 has a second substrate-side attachment portion 114a that is attached to the power storage unit 10 by engaging with it, and a second holding portion-side attachment portion 114b that is attached to the cover portion 120 by engaging with it.

[0066] As shown in FIG. 6 and other figures, the second board-side mounting portion 114a is disposed on the negative Z-axis side of the upper mounting portion 114 and is a protrusion that protrudes in the negative Z-axis direction. The board unit mounting portion 16 of the energy storage unit 10 has a second power-storage-side mounting portion 16c to which the second board-side mounting portion 114a is attached, at a position corresponding to the second board-side mounting portion 114a at the center in the X-axis direction on the positive Z-axis side. A rectangular opening 16d is formed in the second power-storage-side mounting portion 16c. The second board-side mounting portion 114a is inserted into the opening 16d from the positive Z-axis direction and engages with the edge of the opening 16d on the negative Y-axis side, thereby engaging with the second power-storage-side mounting portion 16c. This allows the board holding portion 110 and the energy storage unit 10 to engage with each other on the positive Z-axis side.

[0067] The second holding unit side mounting portion 114b is disposed on the positive side of the upper mounting portion 114 in the Z-axis direction and is a protrusion that protrudes in the negative direction of the Z-axis, to which the second cover side mounting portion 123 of the cover unit 120 is attached. The second cover side mounting portion 123 is a portion that is disposed in the center of the cover unit 120 in the X-axis direction on the positive side of the Z-axis (opposite the bottom portion 15a) of the cover unit 120 and has a protrusion 123a that protrudes in the positive direction of the Z-axis. This protrusion 123a is disposed on the positive side of the second holding unit side mounting portion 114b in the Y-axis direction and engages with the second holding unit side mounting portion 114b in the Y-axis direction, thereby engaging the cover unit 120 and the board holding unit 110 on the positive side of the Z-axis. In this way, the second cover side mounting portion 123 is attached to the board holding unit 110 by engaging with it.

[0068] [2.2.5 Explanation of gripping portion 115] The grip portion 115 is a handle for gripping the energy storage device 1, and is arranged in the center of the substrate holding portion 110 in the X-axis direction on the bottom 15a side of the energy storage device 1 (the negative Z-axis side). Specifically, the grip portion 115 is a portion that is long in the X-axis direction and has the above-mentioned first substrate-side mounting portion 112 at both ends. That is, as described above, at least a portion of the grip portion 115 (first substrate-side mounting portion 112) is arranged closer to the bottom 15a of the energy storage device 1 than at least a portion of the energy storage unit 10 (first power-storage-side mounting portion 16a). In this embodiment, the grip portion 115 is formed integrally with the substrate holding portion 110.

[0069] In this way, the grip portion 115 functions as a handle on the negative Y-axis side of the energy storage device 1. On the positive Y-axis side of the energy storage device 1, the portion where the connection portion 15c of the exterior body support 15 and the connection portion 17c of the exterior body lid 17 of the energy storage unit 10 are connected functions as a handle (second grip portion) (see FIG. 2). The definition of this second grip portion is not particularly limited, and only the connection portion 15c may be referred to as the second grip portion, instead of both the connection portion 15c and the connection portion 17c. Alternatively, the center portion of the connection portion 15c or the connection portions 15c and 17c in the X-axis direction may be referred to as the second grip portion. Alternatively, other portions may be referred to as the second grip portion. The second grip portion is formed by folding the metal plate downward so that it does not become an edge when the worker grips it. The area where connection portion 15b of exterior body support 15 and connection portion 17b of exterior body lid 17 are connected is covered with cover portion 120.

[0070] The gripping portion 115 has an inclined surface 115a on the side facing the power storage unit 10 (positive Y-axis direction) that is inclined in the opposite direction (negative Y-axis direction) from the power storage unit 10 as it approaches the bottom 15a of the power storage device 1 (negative Z-axis direction). That is, the surface of the gripping portion 115 facing the negative Y-axis direction is parallel to the XZ plane, while the surface facing the positive Y-axis direction is inclined from the XZ plane. The inclination angle of the inclined surface 115a is not particularly limited, but it is preferably inclined at an angle that allows (or makes it easy to insert) the fingers of an operator's hand into the positive Y-axis direction side of the gripping portion 115 so that the gripping portion 115 can be held (or is easy to hold). In this embodiment, the inclined surface 115a is inclined at an angle of approximately 45° with respect to the vertical direction.

[0071] The grip portion 115 has a grip portion recess 115b formed on its surface facing the power storage unit 10 (positive Y-axis direction) that is recessed in the opposite direction from the power storage unit 10 (negative Y-axis direction) (see FIG. 6 ). That is, the grip portion recess 115b is a recess formed by recessing the inclined surface 115a of the grip portion 115 in the negative Y-axis direction. In this embodiment, two grip portion recesses 115b are formed on the inclined surface 115a of the grip portion 115, aligned in the X-axis direction. Alternatively, it can be said that inclined surfaces 115a are formed between the two grip portion recesses 115b and on both sides of the two grip portion recesses 115b in the X-axis direction. In other words, walls are arranged between the two grip portion recesses 115b and on both sides of the two grip portion recesses 115b in the X-axis direction (edge ​​portions of the grip portion 115), and the inclined surfaces 115a are formed on the walls. The size, shape and number of the gripping portion recesses 115b are not particularly limited, but it is preferable that the size, shape and number are such that the fingers of the operator's hand can be inserted (or can be easily inserted) so that the gripping portion 115 can be gripped (or can be easily gripped).

[0072] The tip of the gripping portion 115 in the negative Z-axis direction protrudes forward (in the negative Y-axis direction), and the tip has an R-shape, which prevents the edge of the gripping portion 115 from digging into the worker's hand when the worker grasps the gripping portion 115.

[0073] [2.2.6 Explanation of the fixing portion 116 and the board restricting portion 126] Fixing portion 116 is a portion that fixes substrate 200 in an orientation in which the plate surface of substrate 200 faces a direction intersecting the vertical direction (Z-axis direction), and in this embodiment, fixes substrate 200 in an orientation in which the plate surface of substrate 200 faces a horizontal direction (Y-axis direction). Specifically, fixing portion 116 is a protrusion that protrudes in the negative Y-axis direction from the surface of substrate holding portion 110 that faces substrate 200 (the surface on the negative Y-axis direction side of first holding portion wall portion 111a of holding portion main body 111), and fixes substrate 200 in a press-fit state. Fixing portion 116 is not electrically connected to substrate 200, and fixes substrate 200 in a non-conductive state.

[0074] In this embodiment, a plurality of (six) fixing portions 116 are arranged on the outer periphery of the first holding portion wall 111a. That is, three fixing portions 116 are arranged side by side in the X-axis direction at the end of the first holding portion wall 111a on the positive side of the Z-axis, and three fixing portions 116 are arranged side by side in the X-axis direction at the end of the first holding portion wall 111a on the negative side of the Z-axis. That is, the fixing portions 116 are arranged at positions corresponding to the through-holes 230 formed in the substrate 200.

[0075] Specifically, as shown in FIGS. 6 and 7(b), the fixing portion 116 is a protrusion that tapers toward its tip, and is inserted into and press-fitted into the through-hole 230 of the substrate 200 to fix the substrate 200. That is, the fixing portion 116 has a tapered shape in which its width in the X-axis direction and the Z-axis direction decreases toward the negative Y-axis direction. The fixing portion 116 has a cross shape (+ shape) when viewed from the Y-axis direction, and abuts against the inner surface of the through-hole 230 in the Z-axis direction, is compressed, and is press-fitted into the through-hole 230. The fixing portion 116 is configured not to abut against the inner surface of the through-hole 230 in the X-axis direction so that it can be inserted into the through-hole 230 even if its position with respect to the through-hole 230 is misaligned. The fixing portion 116 fixes the substrate 200 at a position spaced apart from the surface facing the substrate 200 (the surface of the first holding portion wall portion 111a on the negative Y-axis direction side). That is, a space is formed between the substrate 200 and the first holding portion wall 111a.

[0076] The size and shape of the fixing portion 116 and the through hole 230 are not particularly limited as long as the fixing portion 116 can be inserted into the through hole 230 in a press-fit state. The fixing portion 116 and the through hole 230 may be circular, elliptical, oval, triangular, or other polygonal shape when viewed in the Y-axis direction, and the fixing portion 116 may also abut against the inner surface of the through hole 230 in the X-axis direction and be compressed. The number and arrangement positions of the fixing portions 116 and the through holes 230 are also not particularly limited.

[0077] The substrate restricting portion 126 of the cover portion 120 is disposed on the negative Y-axis side of the substrate 200. The substrate restricting portion 126 is a protrusion that protrudes in the positive Y-axis direction from the surface of the first cover wall portion 121a of the cover portion main body 121 on the positive Y-axis side, and restricts movement of the substrate 200 in the direction toward the cover portion 120 (the negative Y-axis direction). When the substrate 200 attempts to move in the negative Y-axis direction, the tip of the substrate restricting portion 126 abuts against the substrate 200, thereby restricting movement of the substrate 200 in the negative Y-axis direction. In other words, the fixing portion 116 restricts movement of the substrate 200 in the positive Y-axis direction, and therefore movement of the substrate 200 in both directions in the Y-axis direction is restricted by the fixing portion 116 and the substrate restricting portion 126.

[0078] In this embodiment, a plurality of (four) cylindrical board restriction portions 126 are arranged on the outer periphery of the first cover wall portion 121a. That is, the board restriction portions 126 are arranged on the outer periphery of the board 200 at positions that do not overlap with the fixing portion 116 when viewed from the Y-axis direction. The size, shape, number, arrangement position, etc. of the board restriction portions 126 are not limited to those described above.

[0079] [2.2.7 Explanation of cable placement section 125] Next, the configuration of the cable placement portion 125 of the cover portion 120 will be described with reference to Figs. 9 and 10. Fig. 9 is a perspective view showing the configuration in a state in which the cable 30 is placed in the cable placement portion 125 of the board unit 20 according to this embodiment. Specifically, Fig. 9 is a perspective view showing an enlarged view of the end portion of the energy storage device 1 shown in Fig. 1 on the negative Y-axis side. Fig. 10 is a front view showing the connection configuration of the cable 30 of the energy storage device 1 according to this embodiment. Specifically, Fig. 10 shows the configuration when two energy storage devices 1 are lined up in the Z-axis direction and the cables 30 are connected, as viewed from the negative Y-axis side.

[0080] The cable placement portion 125 is disposed at the end of the cover portion 120 on the positive X-axis direction side opposite the bottom portion 15a of the power storage device 1 (positive Z-axis direction side), and is a portion where the positive power cable 31 of the cable 30 is placed. As shown in Figures 4, 5, 9, etc., the cable placement portion 125 has a first recess 125a, an opening / closing restricting portion 125b, an inclined portion 125c, and a cable restricting portion 125d.

[0081] The first recess 125a is a recess formed by recessing an end portion of the upper surface of a wall portion (also referred to as a third cover wall portion) on the positive side of the Z axis of the cover portion 120 on the positive side of the X axis in the negative direction of the Z axis (one side of a second direction intersecting with the first direction). The first recess 125a can also be said to be a recess formed by recessing the front surface (surface on the negative direction of the Y axis) of the first cover wall portion 121a. Specifically, the first recess 125a is a recess formed to extend in the Y axis direction so as to penetrate the cover portion 120 in the Y axis direction, and the positive power cable 31 is disposed inside.

[0082] The opening / closing restricting portion 125b is a flat, rectangular wall portion parallel to the XZ plane and disposed in the positive direction of the X-axis of the first recess 125a. That is, the opening / closing restricting portion 125b is a portion extending in the positive direction of the Z-axis from the end of the first cover wall 121a on the positive side of the Z-axis and the positive side of the X-axis, or a portion of the end of the first cover wall 121a on the positive side of the Z-axis and the positive side of the X-axis. The opening / closing restricting portion 125b restricts the cover 120 from opening or closing relative to the board holding portion 110 by disposing the positive power cable 31 in the negative direction of the Y-axis. Specifically, the opening / closing restricting portion 125b restricts the cover 120 from rotating relative to the board holding portion 110. In this case, the opening / closing restricting portion 125b also restricts the board holding portion 110 from rotating relative to the board unit mounting portion 16.

[0083] The inclined portion 125c is disposed between the first recess 125a and the opening / closing restricting portion 125b, and is a flat, rectangular wall portion inclined with respect to the opening / closing restricting portion 125b. Specifically, the inclined portion 125c is disposed so as to be inclined toward the negative Y-axis direction as it approaches the positive X-axis direction. When the positive power cable 31 disposed in the first recess 125a is disposed in the negative Y-axis direction of the opening / closing restricting portion 125b, the positive power cable 31 is also disposed in the negative Y-axis direction of the inclined portion 125c.

[0084] The cable regulating portion 125d is a flat wall portion parallel to the XY plane, located between the first recess 125a and the opening / closing restricting portion 125b and in the positive direction of the Z axis of the inclined portion 125c. That is, the cable regulating portion 125d is located in the positive direction of the Z axis (upward) of the space of the first recess 125a, protruding in the negative direction of the X axis and the negative direction of the Y axis. When the positive power cable 31 located in the first recess 125a is located in the negative direction of the Y axis of the opening / closing restricting portion 125b, the positive power cable 31 is located in the negative direction of the Z axis of the cable regulating portion 125d. As a result, the cable regulating portion 125d restricts movement of the positive power cable 31 in the positive direction of the Z axis (the other side of the second direction intersecting with the first direction). By positioning the positive power cable 31 in the negative Z-axis direction (one side of the second direction) of the cable regulating portion 125d, the cable regulating portion 125d regulates movement of the positive power cable 31 in the positive Z-axis direction (the other side of the second direction).

[0085] 10, a plurality of power storage devices 1 are attached to shelves 2 of a rack, and a positive power cable 31 of one power storage device 1 (for example, power storage device 1a) is connected to a negative power cable 32 of another power storage device 1 (for example, power storage device 1b). Specifically, in two power storage devices 1a and 1b arranged side by side in the Z-axis direction, a connector 33 connected to the positive power cable 31 of the power storage device 1a is connected to a connector 34 connected to the negative power cable 32 of the power storage device 1b.

[0086] In this case, the length and the like of the positive power cable 31 of the power storage device 1a is adjusted so that it cannot be connected to the negative power cable 32 of the power storage device 1b unless it passes through the opening / closing regulator 125b in the negative direction of the Y axis. In other words, one end of the positive power cable 31 is electrically connected to the power storage unit 10 of one power storage device 1, and the other end is connected to a conductive member external to the one power storage device 1 (the negative power cable 32 of the other power storage device 1). The opening / closing regulator 125b is disposed in the positive direction of the Y axis of the positive power cable 31 when the positive power cable 31 is connected to the external conductive member.

[0087] In this manner, when the positive power cable 31 is connected to an external conductive member, at least a portion of the cover 120 (the opening / closing restricting portion 125b) is configured to be disposed in the positive direction of the Y axis (the other side in the first direction) of the positive power cable 31. That is, the positive power cable 31 protrudes from the power storage unit 10, extends in the negative direction of the Y axis (one side in the first direction), and is disposed within the first recess 125a. The positive power cable 31 is disposed in the negative direction of the Y axis (one side in the first direction) of at least a portion of the cover 120 (the inclined portion 125c and the opening / closing restricting portion 125b) and is connected to an external conductive member. This restricts the opening / closing (rotation) of the cover 120 relative to the board holding portion 110, and the cable restricting portion 125d also restricts movement of the positive power cable 31 in the positive direction of the Z axis.

[0088] [3 Explanation of effects] As described above, according to the energy storage device 1 according to the embodiment of the present invention, when the positive power cable 31 is connected to an external conductive member of the energy storage device 1, the positive power cable 31 is disposed in the negative Y-axis direction (one side of the first direction) of at least a portion of the cover portion 120. In this manner, when the cover portion 120 is disposed on the outside of the substrate 200 and the positive power cable 31 is connected to an external conductive member (such as the negative power cable 32 of an adjacent energy storage device 1), the positive power cable 31 is disposed outside (in the negative Y-axis direction) of at least a portion of the cover portion 120 (the opening / closing restricting portion 125b). As a result, the positive power cable 31 is present in the middle of the path of rotation of the cover portion 120, and therefore, when the cover portion 120 is opened, the positive power cable 31 gets in the way and prevents the cover portion 120 from being opened. In other words, the cover portion 120 cannot be opened unless the positive power cable 31 is removed from the external conductive member (in the above embodiment, the connector 34 of the negative power cable 32 of the other energy storage device 1) and the positive power cable 31 is moved, and therefore work on the board 200 cannot be performed. Therefore, before work on the board 200 is performed, the connection between the positive power cable 31 of the energy storage device 1 and the external conductive member is cut off, thereby improving safety. In other words, when a power storage facility is configured by connecting multiple energy storage devices 1, each having multiple energy storage elements 11 connected in series, the total voltage of the power storage facility will be high, for example, from several hundred to several thousand volts. When performing work such as maintenance under such high voltage, the power cable can be reliably removed, thereby improving safety.

[0089] In the energy storage device 1, the positive power cable 31 protrudes from the energy storage unit 10 and extends in the negative Y-axis direction, crossing the cover part 120 in the negative Y-axis direction and being disposed in the negative Y-axis direction of at least a portion of the cover part 120, and connected to an external conductive member. In this manner, the positive power cable 31 is disposed so as to wrap around (embrace) at least a portion of the cover part 120. This prevents the cover part 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

[0090] By arranging the positive power cable 31 in the first recess 125a recessed in the negative Z-axis direction (one side in the second direction) of the cover part 120, the positive power cable 31 can be positioned relative to the cover part 120. Therefore, the positive power cable 31 can be stably arranged in the negative Y-axis direction of at least a portion of the cover part 120. This makes it possible to prevent the cover part 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

[0091] The cable restricting portion 125d of the cover portion 120 restricts movement of the positive power cable 31 in the positive direction of the Z axis (the other side of the second direction), thereby preventing the positive power cable 31 from moving from the negative direction of the Y axis of the cover portion 120. This prevents the cover portion 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

[0092] Because the cover part 120 is rotatably attached to the substrate holding part 110, in order to open the cover part 120 and remove the substrate 200, the cover part 120 must be rotated relative to the substrate holding part 110. However, if at least a portion of the cover part 120 is positioned in the positive Y-axis direction of the positive power cable 31, the cover part 120 cannot be rotated. This means that the positive power cable 31 must be removed from the external conductive member and moved in order to open the cover part 120, thereby improving safety.

[0093] The energy storage device 1 includes an energy storage unit 10 having energy storage elements 11, and a board unit 20 having a board 200 and a board accommodating portion 100 and attached to the energy storage unit 10. The board accommodating portion 100 of the board unit 20 has a gripping portion 115 for gripping the energy storage device 1. By providing the gripping portion 115 on the board accommodating portion 100 of the board unit 20 in this manner, the board unit 20 does not get in the way and make it difficult to grip the energy storage device 1, or a complicated structure is required to grip the energy storage device 1 while avoiding the board unit 20. This allows the energy storage device 1 to be easily gripped using the gripping portion 115, making it easy to move (lift, pull out, etc.) the energy storage device 1. As shown in FIG. 10 , the task of lifting the energy storage device 1 to carry it to a shelf 2 of a rack and the task of pushing or pulling out the energy storage device 1 after placing it on the shelf 2 can be easily performed.

[0094] In the energy storage device 1, if a gripping portion could be provided on the exterior body support 15 by sheet metal processing, the gripping portion could be provided easily, but in order to attach the energy storage device 1 to a shelf board 2 of a rack or the like, wall portion 16b is provided on the exterior body support 15. For this reason, it was not easy to provide a gripping portion on the exterior body support 15, and it was necessary to attach a gripping portion of a separate member, for example. For this reason, by providing the gripping portion 115 on the board accommodating portion 100 of the board unit 20, the number of parts is not increased and the gripping portion 115 can be easily configured.

[0095] In the substrate unit 20, the substrate 200 is fixed to the substrate holding part 110 by press-fitting. Therefore, even if the substrate unit 20 is slightly deformed by gripping the gripping part 115, the substrate 200 can move relative to the substrate holding part 110, so that the substrate 200 can be prevented from being damaged, such as deformed.

[0096] By attaching the board unit 20 to the end of the electricity storage unit 10 in the longitudinal direction (Y-axis direction), the gripping portion 115 is also attached to the end of the electricity storage unit 10 in the longitudinal direction. This allows the electricity storage device 1, which is a heavy object, to be gripped in the longitudinal direction, so that the electricity storage device 1 can be stably held and can be easily moved.

[0097] At least a part of the gripping portion 115 of the board unit 20 (first board-side mounting portion 112) is disposed closer to the bottom 15a of the power storage device 1 than at least a part of the power storage unit 10 (first power-storage-side mounting portion 16a). This restricts the gripping portion 115 from moving relative to the power storage unit 10, for example, when an attempt is made to lift the power storage device 1 by holding the gripping portion 115. Restricting the gripping portion 115 from moving relative to the power storage unit 10 prevents the board unit 20 from coming off the power storage unit 10. In this way, when the power storage device 1 is moved by holding the gripping portion 115, the board unit 20 can be prevented from coming off the power storage unit 10, and therefore the power storage device 1 can be moved easily.

[0098] Because the board unit 20 is connected to the power storage unit 10 on the bottom 15a side, the fulcrum of the force acting when gripping the grip portion 115 to move the power storage device 1 is located on the bottom 15a side of the board unit 20, that is, at a location away from the board 200. In this case, by positioning the point of force in the negative Z-axis direction (downward) from the fulcrum, the point of action becomes a location in the positive Z-axis direction (upward) from the fulcrum. The position of the first board-side mounting portion 112 (the position of the first power-storage-side mounting portion 16a) is the fulcrum, and the position of the pad of the fingertip inserted by the operator into the grip portion recess 115b is the point of force.

[0099] Assume a situation in which the energy storage device 1 is moved by being pulled toward the worker (negative direction of the Y axis) when replacing the energy storage device 1, for example. In this case, the worker inserts his / her finger into the gripping portion recess 115b of the gripping portion 115 of the board unit 20 and pulls it toward the worker, thereby moving the energy storage device 1. At this time, if the position (point of force) of the finger is located in the negative direction of the Z axis from the position (fulcrum) of the first board-side mounting portion 112, the upper part of the board unit 20 becomes the point of action, and the force acts in a direction pushing the energy storage unit 10 (positive direction of the Y axis). If the position (point of force) of the finger is located above the position (fulcrum) of the first board-side mounting portion 112, the board unit 20 will rotate and attempt to come off the energy storage unit 10, as shown in FIG. 8 . In contrast, when the position of the finger (point of force) is located below the position (fulcrum) of the first board side mounting portion 112, the board unit 20 presses against the storage unit 10, thereby preventing the board unit 20 from coming off the storage unit 10.

[0100] In order to position the position of the finger (point of force) below the position (fulcrum) of first board-side mounting portion 112, gripping portion recess 115b preferably recesses only to a relatively low position in the Z-axis direction. In this embodiment, gripping portion recess 115b recesses to a position slightly higher than first board-side mounting portion 112, but it may also recess only to the same height as the position of first board-side mounting portion 112 or to a position lower than the position of first board-side mounting portion 112.

[0101] The formation of the gripping portion recess 115b on the surface of the gripping portion 115 of the substrate unit 20 facing the power storage unit 10 makes it easy for an operator to insert the fingers of a hand between the gripping portion 115 and the power storage unit 10, making it easy to grasp the gripping portion 115. This makes it easy to grip the power storage device 1, and therefore, makes it easy to move the power storage device 1.

[0102] The inclined surface 115a is formed on the surface of the gripping portion 115 of the substrate unit 20 facing the power storage unit 10, which makes it easier for an operator to insert the fingers of a hand between the gripping portion 115 and the power storage unit 10, making it easier to grasp the gripping portion 115. This makes it easier to grip the power storage device 1, and therefore easier to move the power storage device 1.

[0103] The energy storage device 1 includes an energy storage unit 10 having energy storage elements 11, and a substrate unit 20 having a substrate 200 and a substrate accommodating portion 100 and attached to the energy storage unit 10. In the substrate accommodating portion 100, the cover portion 120 has a first cover-side attachment portion 122 that is rotatably attached to the substrate holding portion 110. Since the cover portion 120 is rotatably attached to the substrate holding portion 110 in this manner, the cover portion 120 can be easily rotated relative to the substrate holding portion 110, and therefore the cover portion 120 can be easily opened and closed relative to the substrate 200. This allows easy access to the substrate 200, facilitating maintenance work on the substrate 200 (such as installation, repair, or replacement of the substrate 200). This is extremely effective in assembly work and maintenance work when a large number of energy storage devices 1 are installed. The same applies to the following.

[0104] If the first cover side mounting portion 122 of the cover portion 120 is disposed on the opposite side (upper side) from the bottom 15a side of the energy storage device 1, it is necessary to lift the cover portion 120 when rotating the cover portion 120 relative to the substrate holding portion 110, which may make it difficult to perform work such as maintenance of the substrate 200. For this reason, the first cover side mounting portion 122 is disposed on the bottom 15a side (lower side) of the cover portion 120. This allows the first cover side mounting portion 122 to rotate on the bottom 15a side of the energy storage device 1, making it easy to perform work such as maintenance of the substrate 200.

[0105] In the substrate accommodating unit 100, the first cover side mounting portion 122 of the cover unit 120 is positioned further toward the direction from the cover unit 120 toward the substrate holding unit 110 than the first holding unit side mounting portion 113 of the substrate holding unit 110. As a result, even if the cover unit 120 attempts to detach from the substrate holding unit 110, the first holding unit side mounting portion 113 restricts the movement of the first cover side mounting portion 122, thereby preventing the cover unit 120 from detaching from the substrate holding unit 110. When the first cover side mounting portion 122 is rotated 90 degrees relative to the first holding unit side mounting portion 113, the first cover side mounting portion 122 is positioned above the first holding unit side mounting portion 113, thereby preventing the cover unit 120 from falling off the substrate holding unit 110.

[0106] The cover part 120 of the substrate accommodating part 100 has, in addition to the first cover side mounting part 122, a second cover side mounting part 123 that engages with the substrate holding part 110. This allows the cover part 120 to be attached to the substrate holding part 110 by both the first cover side mounting part 122 and the second cover side mounting part 123, making it possible to attach the cover part 120 to the substrate holding part 110 more firmly.

[0107] In the substrate accommodating unit 100, the cover unit 120 has a rotation restricting unit 127 that restricts rotation relative to the substrate holding unit 110, thereby restricting rotation of the cover unit 120 relative to the substrate holding unit 110. This prevents the cover unit 120 from rotating too much and coming into contact with other members or falling off the substrate holding unit 110, making it easier to perform maintenance work on the substrate 200.

[0108] The energy storage device 1 includes an energy storage unit 10 having energy storage elements 11, and a board unit 20 having a board 200 and a board holding portion 110 and attached to the energy storage unit 10, the board holding portion 110 having a first board-side attachment portion 112 that is rotatably attached to the energy storage unit 10. Since the board holding portion 110 of the board unit 20 is rotatably attached to the energy storage unit 10 in this manner, the board unit 20 can be easily rotated with respect to the energy storage unit 10. This allows the board unit 20 to be easily moved with respect to the energy storage unit 10 and attached / detached therefrom, making it easy to perform work on the board 200. This is extremely effective in assembly work, maintenance work, and the like when a large number of energy storage devices 1 are installed. The same applies to the following.

[0109] If the first substrate-side mounting portion 112 of the substrate holding portion 110 is disposed on the opposite side (upper side) from the bottom 15a side of the energy storage device 1, it will be necessary to lift up the substrate unit 20 when rotating the substrate unit 20 relative to the energy storage unit 10. For this reason, the first substrate-side mounting portion 112 is disposed on the bottom 15a side (lower side) of the energy storage device 1 in the substrate holding portion 110. As a result, the first substrate-side mounting portion 112 rotates on the bottom 15a side of the energy storage device 1, so that the substrate unit 20 can be easily moved relative to or attached / detached from the energy storage unit 10, and work on the substrate 200 can be easily performed.

[0110] By arranging the first board-side mounting portion 112 closer to the bottom 15a of the energy storage device 1 than the first power-storage-side mounting portion 16a of the energy storage unit 10, the first board-side mounting portion 112 is restricted from moving relative to the energy storage unit 10, for example, when an attempt is made to lift the energy storage device 1 by gripping the board unit 20. This makes it possible to prevent the first board-side mounting portion 112 from moving relative to the energy storage unit 10 and causing the board unit 20 to detach from the energy storage unit 10. The board unit 20 can be easily removed from the energy storage unit 10 by moving (pulling out) the first board-side mounting portion 112 from the first power-storage-side mounting portion 16a toward the bottom 15a.

[0111] The board holding part 110 has, in addition to the first board-side mounting part 112, a second board-side mounting part 114a that engages with the energy storage unit 10. This allows the board unit 20 to be mounted to the energy storage unit 10 by both the first board-side mounting part 112 and the second board-side mounting part 114a, making it possible to mount the board unit 20 to the energy storage unit 10 more firmly.

[0112] When the substrate unit 20 has a cover portion 120 attached to the substrate holding portion 110, it is preferable that the substrate 200 be easily accessible when performing work on the substrate 200. For this reason, the cover portion 120 is provided with a first cover-side attachment portion 122 that is rotatably attached to the substrate holding portion 110. This allows easy access to the substrate 200 by rotating the cover portion 120 relative to the substrate holding portion 110 to open or close it, making it easy to perform work on the substrate 200.

[0113] In the energy storage device 1, the substrate holding part 110 that holds the substrate 200 has a fixing part 116 that fixes the substrate 200 in a press-fit state. Fixing the substrate 200 to the substrate holding part 110 by press-fitting in this way eliminates the need for work such as attaching and removing screws, and therefore the substrate 200 can be easily attached to and detached from the substrate holding part 110. Fixing the substrate 200 to the substrate holding part 110 by press-fitting eliminates the need for members such as screws, and therefore the number of parts can be reduced.

[0114] Fixing portion 116 of substrate holding portion 110 is a protrusion that becomes thinner toward the tip, and when press-fitted into through-hole 230 of substrate 200, fixes substrate 200 at a position spaced apart from the opposing surface of substrate holding portion 110. In this way, by providing substrate holding portion 110 with a tapered protrusion and press-fitting this protrusion into through-hole 230 of substrate 200, substrate 200 can be easily attached to and detached from substrate holding portion 110 with a simple configuration. By fixing substrate 200 at a position spaced apart from the opposing surface of substrate holding portion 110, components can also be arranged on the back surface of substrate 200 (the surface on the opposing surface side).

[0115] When the plate surface of substrate 200 faces a direction intersecting the vertical direction, it is difficult to attach or detach substrate 200 to or from substrate holding part 110 if substrate 200 is fixed with screws or the like. Therefore, by fixing substrate 200 to substrate holding part 110 by press-fitting with fixing parts 116, substrate 200 can be easily attached or detached to or from substrate holding part 110 with a simple configuration. This is extremely effective in assembly work when there are a large number of energy storage devices 1, maintenance work, and the like.

[0116] Since the substrate 200 is fixed to the fixing portion 116 of the substrate holding portion 110 by press-fitting rather than by screws, there is a risk that the substrate 200 may come off the fixing portion 116. For this reason, the cover portion 120 attached to the substrate holding portion 110 is provided with a substrate restricting portion 126 that restricts movement of the substrate 200 toward the cover portion 120. This makes it possible to prevent the substrate 200, which is fixed to the fixing portion 116 of the substrate holding portion 110 by press-fitting, from coming off the fixing portion 116.

[0117] Because the cover part 120 is rotatably attached to the substrate holding part 110, the cover part 120 can be easily opened and closed relative to the substrate holding part 110 by rotating the cover part 120 relative to the substrate holding part 110. This allows the substrate 200 to be easily attached to and detached from the substrate holding part 110 even when the cover part 120 is attached to the substrate holding part 110.

[0118] The connectors 210 and 220 of the board 200 are arranged at an end on a side different from the side on which the axis about which the cover unit 120 rotates relative to the board holding unit 110 is located. This prevents the connectors 210 and 220 or the cables connected to the connectors 210 and 220 from getting in the way when rotating the cover unit 120. This allows the cover unit 120 to be rotated easily, for example, with the cables attached to the connectors 210 and 220, and therefore the board 200 can be easily attached to and detached from the board holding unit 110.

[0119] Connector 210 is disposed at the end of board 200 on the positive side of the Z axis, and the socket faces in the positive direction of the Z axis (parallel to the surface of board 200), so connector 13b can be easily attached and detached, and cable 13a is not disposed on the surface of board 200. This allows board 200 to be easily attached and detached to and from board holder 110.

[0120] [4 Explanation of Variations] (Variation) Next, a modified example of the above embodiment will be described. Fig. 11 is a perspective view showing the configuration of a cable placement section 125A of a cover section 120A according to a modified example of the present embodiment. Specifically, Fig. 11(a) is a perspective view showing the configuration of the cover section 120A, and Fig. 11(b) is a perspective view showing the configuration in a state where a positive power cable 31 is placed in the cable placement section 125A.

[0121] 11, the cover 120A of this modification has a cable routing portion 125A instead of the cable routing portion 125 of the cover 120 of the above embodiment. The cable routing portion 125A has an opening / closing restricting portion 125b, a cable restricting portion 125d, a second recess 125e, and a third recess 125f. The other configuration of this modification is the same as that of the above embodiment, so detailed description will be omitted.

[0122] Similar to the open / close restricting portion 125b in the above embodiment, the open / close restricting portion 125b in this modified example is a portion that restricts the cover portion 120A from opening or closing (rotating) relative to the substrate holding portion 110 by arranging the positive power cable 31 in the negative Y-axis direction. Specifically, the open / close restricting portion 125b is a wall portion that is parallel to the YZ plane and is arranged in the positive Z-axis direction of the second recess 125e and the positive Y-axis direction of the third recess 125f. In other words, the open / close restricting portion 125b is a portion that protrudes in the negative Z-axis direction and is provided at the end of the wall portion of the second cover wall portion 121b on the positive X-axis direction side, on the positive Z-axis side.

[0123] Similar to the cable regulating portion 125d in the above embodiment, the cable regulating portion 125d in this modification is a portion that regulates movement of the positive power cable 31 in the positive direction of the Z axis. Specifically, the cable regulating portion 125d is a wall portion that is arranged in the positive direction of the Z axis of the third recessed portion 125f and is parallel to the YZ plane.

[0124] The second recess 125e is a recess formed in the end portion of the wall portion of the second cover wall 121b on the positive side of the X axis in the positive direction of the Z axis, and recessed in the negative direction of the Y axis (one side in the first direction). Specifically, the second recess 125e is a recess formed to penetrate the wall portion of the second cover wall 121b in the X axis direction and extend in the Y axis direction.

[0125] The third recess 125f is recessed from the second recess 125e in the positive direction of the Z axis (the other side in the second direction intersecting with the first direction). That is, the third recess 125f is recessed in the positive direction of the Z axis from the end of the second recess 125e on the negative side of the Y axis, and is disposed in the negative direction of the Y axis of the open / close restricting portion 125b and the negative direction of the Z axis of the cable restricting portion 125d. As shown in FIG. 11(b), the positive power cable 31 is disposed inside the third recess 125f. That is, the positive power cable 31 is inserted into the second recess 125e from the positive direction of the Y axis and then lifted in the positive direction of the Z axis to connect to an external conductive member (such as a negative power cable 32 of another power storage device 1), thereby disposing the positive power cable 31 in the third recess 125f.

[0126] In this manner, when the positive power cable 31 is connected to an external conductive member, at least a portion of the cover 120A (the opening / closing restricting portion 125b) is disposed in the positive direction of the Y axis of the positive power cable 31. In other words, the positive power cable 31 protrudes from the power storage unit 10 and extends in the negative direction of the Y axis, then changes direction to the positive direction of the X axis and is disposed within the third recess 125f. As a result, the positive power cable 31 is disposed in the negative direction of the Y axis of the opening / closing restricting portion 125b and is connected to an external conductive member. As a result, opening / closing (rotation) of the cover 120A relative to the board holding portion 110 is restricted, and the movement of the positive power cable 31 in the positive direction of the Z axis is also restricted by the cable restricting portion 125d.

[0127] As described above, the energy storage device 1 according to this modification can achieve the same effects as the above-described embodiment. In particular, in this modification, the cover portion 120A is formed with the second recess 125e and the third recess 125f, and the positive power cable 31 is disposed in the third recess 125f, so that a part of the cover portion 120A (the opening / closing restricting portion 125b) is disposed in the positive direction of the Y-axis of the positive power cable 31. This prevents the cover portion 120A from opening when the positive power cable 31 is connected to an external conductive member (such as the negative power cable 32 of an adjacent energy storage device 1), thereby improving safety. The third recess 125f may be recessed from the second recess 125e in the negative direction of the Z-axis (to one side in the second direction).

[0128] (Other variations) Although the energy storage device 1 according to the present embodiment and its modifications have been described above, the present invention is not limited to the above-described embodiment and its modifications. In other words, the embodiment and its modifications disclosed herein are illustrative in all respects and are not restrictive, and the scope of the present invention includes all modifications within the meaning and scope equivalent to the claims.

[0129] In the above-described embodiment and its modified examples, the board unit 20 is attached to the end of the energy storage unit 10 in the longitudinal direction (Y-axis direction). However, the board unit 20 may be attached to the end of the energy storage unit 10 in the X-axis direction or Z-axis direction.

[0130] In the above embodiment and its modified examples, the first holding part side mounting part 113 of the substrate holding part 110 and the first cover side mounting part 122 of the cover part 120 or 120A (hereinafter referred to as the cover part 120, etc.) are arranged on the bottom part 15a side (the negative Z-axis direction side) of the energy storage device 1. However, the first holding part side mounting part 113 and the first cover side mounting part 122 may be arranged in any position, such as on the positive Z-axis direction side or in the center in the Z-axis direction.

[0131] In the above embodiment and its modified examples, the first holding unit side mounting portion 113 of the substrate holding unit 110 is a shaft and is inserted into the opening of the first cover side mounting portion 122 of the cover unit 120 or the like. However, the shapes of the first holding unit side mounting portion 113 and the first cover side mounting portion 122 are not particularly limited. The first cover side mounting portion 122 may be open in any direction, or may be a through hole without an opening into which the first holding unit side mounting portion 113 is inserted. Alternatively, the first holding unit side mounting portion 113 and the first cover side mounting portion 122 may have opposite configurations, i.e., the first cover side mounting portion 122 may be a shaft and inserted into the first holding unit side mounting portion 113. The cover unit 120 or the like does not need to be rotatably attached to the substrate holding unit 110.

[0132] In the above embodiment and its modified examples, the cover portion 120 etc. has the first cover side mounting portion 122 and the second cover side mounting portion 123 that are attached to the substrate holding portion 110. However, the cover portion 120 etc. does not have to have the second cover side mounting portion 123 or the first cover side mounting portion 122. The same applies to the substrate holding portion 110 side. The cover portion 120 etc. does not have to have the rotation restriction portion 127.

[0133] In the above embodiment and its modified examples, the positive power cable 31 is present in the middle of the path of rotation of the cover part 120 etc., and therefore when opening the cover part 120 etc., the positive power cable 31 directly gets in the way, making it impossible to open the cover part 120 etc. However, even if the positive power cable 31 does not directly get in the way, the cover part 120 etc. may have a protruding shape or the positive power cable 31 may have the protruding shape or the like so that it gets in the way when opening the cover part 120 etc.

[0134] In the above-described embodiment and its modified examples, the first substrate-side mounting portion 112 of the substrate holding portion 110 and the first power-storage-side mounting portion 16a of the power storage unit 10 are arranged on the bottom 15a side (the negative Z-axis direction side) of the power storage device 1. However, the first substrate-side mounting portion 112 and the first power-storage-side mounting portion 16a may be arranged at any position, such as on the positive Z-axis direction side or in the center in the Z-axis direction.

[0135] In the above-described embodiment and its modified examples, the first board-side mounting portion 112 of the board holding portion 110 is a shaft, the first power storage unit 16a of the energy storage unit 10 has an opening at a portion on the negative Z-axis direction side, and the first board-side mounting portion 112 is inserted into the first power storage unit 16a. However, the shapes of the first board-side mounting portion 112 and the first power storage unit 16a are not particularly limited. The first power storage unit 16a may have an opening at a portion in any direction, or may be a through-hole without an opening into which the first board-side mounting portion 112 is inserted. Alternatively, the first board-side mounting portion 112 and the first power storage unit 16a may have opposite configurations, i.e., the first power storage unit 16a may be a shaft and inserted into the first board-side mounting portion 112. The board holding portion 110 does not have to be rotatably attached to the energy storage unit 10.

[0136] In the above-described embodiment and its modified examples, the substrate holding part 110 has the first substrate-side mounting part 112 and the second substrate-side mounting part 114a that are attached to the energy storage unit 10. However, the substrate holding part 110 does not have to have the second substrate-side mounting part 114a, and it does not have to have the first substrate-side mounting part 112. The same applies to the energy storage unit 10 side.

[0137] In the above embodiment and its modifications, fixing portion 116 of substrate holding portion 110 is a protrusion that becomes thinner toward the tip, and fixes substrate 200 at a position spaced apart from the opposing surface of substrate holding portion 110. However, fixing portion 116 does not have to have a tapered shape, and substrate 200 may be fixed in a state where it is in contact with the opposing surface of substrate holding portion 110.

[0138] In the above embodiment and its modified examples, the substrate 200 is fixed in a position in which the plate surface faces in a direction intersecting the vertical direction. However, the substrate 200 may be fixed in a position in which the plate surface faces in the vertical direction (horizontally).

[0139] In the above embodiment and its modified examples, the cover portion 120 etc. has the board restricting portion 126. However, as long as the board 200 can be firmly fixed by the fixing portion 116, the cover portion 120 etc. does not have to have the board restricting portion 126. Alternatively, instead of the cover portion 120 etc. having the board restricting portion 126, the board 200 may be fixed to the fixing portion 116 etc. with an adhesive or the like.

[0140] In the above embodiment and its modified examples, the connectors 210 and 220 of the substrate 200 are arranged at the end on a side different from the side on which the axis about which the cover part 120 etc. rotates relative to the substrate holding part 110 is located, but they may also be arranged on the side on which the axis is located.

[0141] In the above embodiment and its modified examples, the substrate holding part 110 has the fixing part 116 that fixes the substrate 200 in a press-fit state. However, the substrate holding part 110 may fix the substrate 200 by screwing or the like instead of press-fitting the substrate 200.

[0142] In the above embodiment and its modified examples, the opening / closing restricting portion 125b of the cover portion 120 or the like is arranged in the positive direction of the Y axis (the other side of the first direction) of the positive power cable 31. However, the opening / closing restricting portion 125b may be arranged in the positive direction of the Y axis of a cable other than the positive power cable 31, such as the negative power cable 32 or a communication cable. Alternatively, the cover portion 120 or the like may not have the cable restricting portion 125d.

[0143] In the above embodiment and its modified examples, the negative power cable 32 of an adjacent energy storage device 1 is exemplified as an external conductive member to which the positive power cable 31 is connected. However, various other external conductive members can be exemplified, such as the positive power cable 31 of an adjacent energy storage device 1, the negative power cable 32 or the positive power cable 31 of a non-adjacent energy storage device 1, or an external control device that controls multiple energy storage devices 1.

[0144] In the above embodiment and its modified examples, the positive power cable 31 of the energy storage device 1 extends upward and is connected to the negative power cable 32 of the upper energy storage device 1. However, the positive power cable 31 of the energy storage device 1 may extend downward and be connected to the negative power cable 32 of the lower energy storage device 1. The negative power cable 32 connected to the positive power cable 31 of the upper energy storage device 1 can be extended directly upward by using an L-shaped crimp terminal. In this case, in the above embodiment, the positive power cable 31 extends downward from the first recess 125a and is disposed on the front surface of the cover body 121 (in the negative Y-axis direction of the first cover wall 121a). In the modified example shown in FIG. 11, the positive power cable 31 extends downward from the second recess 125e and is disposed on the side surface of the cover body 121 (in the positive X-axis direction of the second cover wall 121b). In the modification shown in FIG. 11, the third recess 125f may be recessed in the negative Z-axis direction from the second recess 125e.

[0145] In the above embodiment and its modified examples, the cover 120 and the like are configured to move (rotate) in the negative Y-axis direction to open, and at least a portion of the cover 120 and the like is disposed in the positive Y-axis direction of the positive power cable 31. However, the cover 120 and the like may be configured to move (slide) in the positive Z-axis direction to open, and at least a portion of the cover 120 and the like may be disposed in the negative Z-axis direction of the positive power cable 31 (the positive Z-axis direction of the circuit board 200). In other words, when the positive power cable 31 is connected to an external conductive member, the positive power cable 31 may be disposed in the positive Z-axis direction of at least a portion of the cover 120 and the like. In other words, when the positive power cable 31 is connected to an external conductive member, at least a portion of the cover 120 and the like may be disposed between the circuit board 200 and the positive power cable 31 in the Z-axis direction. In this case, the Z-axis direction is the first direction, the positive Z-axis direction is one side of the first direction, and the negative Z-axis direction is the other side of the first direction. Similarly, the negative Z-axis direction may be one side of the first direction, the positive X-axis direction may be one side of the first direction, or the negative X-axis direction may be one side of the first direction. In the above-mentioned case, even if the cover part 120 etc. is configured to be removed by a screw or the like rather than moved by a slide, the removal direction may be limited and the positive power cable 31 may be positioned in that limited path.

[0146] In the above embodiment and its modifications, the substrate accommodating unit 100 has the substrate holding unit 110, the cover unit 120, etc. However, the substrate accommodating unit 100 may not have the cover unit 120, etc. Alternatively, the substrate accommodating unit 100 may not have the substrate holding unit 110. In this case, the substrate 200 may be attached to the cover unit 120, etc., and the gripping unit 115 may be provided on the cover unit 120, etc. Even when the substrate accommodating unit 100 has the substrate holding unit 110, the substrate 200 may be attached to the cover unit 120, etc., and the gripping unit 115 may be provided on the cover unit 120, etc. In other words, the gripping unit 115 may be provided on the substrate accommodating unit 100.

[0147] In the above embodiment and its modified examples, the inclined surface 115a and the gripping portion recess 115b are formed on the gripping portion 115 of the board unit 20. However, the gripping portion 115 may not have at least one of the inclined surface 115a and the gripping portion recess 115b. Alternatively, the board unit 20 may not have the gripping portion 115.

[0148] Any combination of the components included in the above-described embodiments and their modifications is also included within the scope of the present invention.

[0149] The present invention can be realized not only as the electricity storage device 1, but also as the cover part 120 etc., or the cover part 120 etc. and a cable (positive power cable 31 etc.). [Industrial Applicability]

[0150] 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]

[0151] 1, 1a, 1b Energy storage device 2 shelves 10 Energy storage unit 11 Energy storage element 11a Container 11b Positive terminal 11c Negative terminal 11d spacer 12 Busbar frame 13 Busbar 13a, 30 cable 13b, 33, 34, 210, 220 connectors 14. Exterior body 15 Exterior body support 15a bottom 15b, 15c, 17b, 17c connection parts 16 Board unit mounting section 16a First storage battery side mounting portion 16b wall 16c Second storage battery side mounting part 16d, 124 opening 17 Exterior body lid 17a Top section 18 Exterior body 20 Circuit Board Unit 31 Positive power cable 32 Negative power cable 100 Substrate accommodating section 110 Board holding part 111 Holding unit body 111a First holding part wall part 111b Second holding part wall part 112 First board side mounting portion 113 First holding part side mounting part 114 Upper mounting part 114a Second board side mounting portion 114b Second holding portion side mounting portion 115 Gripping part 115a Slope 115b Grip recess 116 Fixed part 120, 120A cover 121 Cover body 121a First cover wall 121b Second cover wall 122 First cover side mounting part 123 Second cover side mounting part 123a protrusion 125, 125A cable placement section 125a First recess 125b Opening and closing control part 125c Slope 125d Cable management part 125e ​​Second recess 125f Third recess 126 PCB control section 127 Rotation control part 200 boards 230 Through hole

Claims

1. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, The cable extends from the other side of the cover portion in the first direction to one side in the first direction when the cable is connected to the external conductive member, and is arranged in a path where at least a part of the cover portion is opened on the one side in the first direction. Energy storage device.

2. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, the cable is disposed on one side in the first direction of at least a part of the cover portion in a state in which the cable is connected to the external conductive member; the power storage unit is disposed on the other side of the cover portion in the first direction, The cable protrudes from the power storage unit, extends to one side in the first direction, is disposed on the one side in the first direction of at least the part of the cover, and is connected to the external conductive member. Energy storage device.

3. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, the cable is disposed on one side in the first direction of at least a part of the cover portion in a state in which the cable is connected to the external conductive member; the cover portion has a first recess portion recessed to one side in a second direction intersecting the first direction, The cable is disposed in the first recess. Energy storage device.

4. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, the cable is disposed on one side in the first direction of at least a part of the cover portion in a state in which the cable is connected to the external conductive member; The cover portion is a second recess recessed toward one side in the first direction; a third recess recessed from the second recess toward one side or the other side in a second direction intersecting the first direction, The cable is disposed in the third recess. Energy storage device.

5. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, the cable is disposed on one side in the first direction of at least a part of the cover portion in a state in which the cable is connected to the external conductive member; the cover portion has a restricting portion that restricts movement of the cable, The cable is disposed on one side of the restricting portion in a second direction intersecting with the first direction, and the restricting portion restricts movement of the cable to the other side in the second direction. Energy storage device.

6. A power storage device including a power storage unit having a power storage element, a substrate electrically connected to the power storage unit; a cover portion disposed on one side of the substrate in a first direction; a cable having one end electrically connected to the power storage unit and the other end connected to a conductive member outside the power storage device, the cable is disposed on one side in the first direction of at least a part of the cover portion in a state in which the cable is connected to the external conductive member; the power storage device further includes a substrate holding portion that holds the substrate and to which the cover portion is attached, The cover is attached to the substrate holder so as to be rotatable. Energy storage device.

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