Power storage installation

Abstract

To provide a power storage installation capable of suppressing overheating of a power storage device.SOLUTION: A power storage installation comprises: a power storage device having a power storage element 100; and a shelf board 940 that is arranged to one side of a first direction of the power storage device. The power storage device comprises wall materials 321 and 521 that are arranged between the power storage element and the shelf board. The power storage element comprises a gas exhaust valve 131 that is opposite to each wall material. In each wall material, an open part 521b, and a lid part 521a that is a lid part for blocking the open part and is opened toward the shelf board are provided.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to an electricity storage facility. [Background technology]

[0002] Patent Document 1 discloses a battery module including multiple secondary batteries and a duct. The duct has multiple communication ports arranged opposite pressure release valves of the secondary batteries, and an exhaust passage inside the duct that communicates with the communication ports. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-99354 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the battery module disclosed in Patent Document 1, gas from the pressure release valve of the secondary battery is discharged through an exhaust passage in the duct. If the gas is hot, the gas may overheat the duct, which may result in the battery module overheating.

[0005] The present invention was made by the inventors of the present application by focusing on the above-mentioned problem, and has an object to provide an electricity storage facility that can prevent the electricity storage device from being overheated. [Means for solving the problem]

[0006] An energy storage facility according to one embodiment of the present invention comprises an energy storage device having an energy storage element, and a shelf board arranged on one side of a first direction of the energy storage device, wherein the energy storage device comprises a wall member arranged between the energy storage element and the shelf board, the energy storage element comprises a gas exhaust valve facing the wall member, and the wall member is provided with an opening and a lid portion that covers the opening and opens toward the shelf board. Effect of the Invention

[0007] According to the electricity storage facility of the present invention, it is possible to prevent the electricity storage device from being overheated. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the appearance of an electricity storage facility according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing an external appearance of the electricity storage device according to the embodiment. [Diagram 3] FIG. 3 is an exploded perspective view illustrating components of a power storage unit included in the power storage device according to the embodiment. [Figure 4] FIG. 4 is a perspective view showing a configuration of an energy storage element according to an embodiment. [Diagram 5] FIG. 5 is a plan view showing the configuration of a cover portion provided on the second wall member of a second upper exterior body and a guide portion provided on the first wall member of a first upper exterior body according to the embodiment. [Figure 6] FIG. 6 is a cross-sectional view showing the configuration of a cover portion provided on the second wall member of a second upper exterior body and a guide portion provided on the first wall member of a first upper exterior body according to the embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing the configuration of a cover portion provided on the second wall member of a second upper exterior body and a guide portion provided on the first wall member of a first upper exterior body according to the embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing the configuration of a shelf board according to the embodiment and the positional relationship between the shelf board and an electricity storage device. [Figure 9] FIG. 9 is a cross-sectional view showing the positional relationship between the shelf board and the electricity storage device according to the embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing the positional relationship between the shelf board and the electricity storage device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (1) An embodiment of the present invention provides an energy storage facility comprising: an energy storage device having an energy storage element; and a shelf board arranged on one side of the energy storage device in a first direction, the energy storage device comprising a wall member arranged between the energy storage element and the shelf board, the energy storage element comprising a gas exhaust valve facing the wall member, and the wall member having an opening and a lid portion that covers the opening and opens toward the shelf board.

[0010] According to this, in the energy storage facility, the energy storage device includes a wall member between the energy storage element and the shelf board that faces the gas exhaust valve of the energy storage element, and the wall member is provided with a lid portion that closes the opening and opens toward the shelf board. With this configuration, gas from the gas exhaust valve of the energy storage element is exhausted from the opening of the wall member toward the shelf board, so that even if the gas is high in temperature, the wall member can be prevented from being overheated by the gas. Therefore, the energy storage device can be prevented from being overheated.

[0011] (2) In the electricity storage facility described in (1) above, the opening may be disposed in a position facing the gas release valve.

[0012] According to this, the opening of the wall member is disposed opposite the gas release valve of the electricity storage element, so that gas from the gas release valve can be smoothly released toward the opening.

[0013] (3) In the storage equipment described in (1) or (2) above, the lid portion may open from an end in a second direction intersecting the first direction, and the length of the lid portion in the second direction may be greater than the distance between the opening and the shelf.

[0014] According to this, since the length of the lid of the wall member in the second direction is greater than the distance between the opening of the wall member and the shelf, when the lid is opened, the end of the lid is disposed near the shelf or contacts the shelf, thereby restricting the direction of gas flow, such as preventing the gas flowing in from the opening from flowing in the direction of a heat-sensitive member such as a substrate.

[0015] (4) In the energy storage facility described in (3) above, the energy storage device may include a plurality of the energy storage elements arranged in the second direction.

[0016] According to this, when the plurality of energy storage elements are arranged in the second direction, gas flows to one side in the second direction and gas flow to the other side in the second direction is suppressed, gas flow toward the adjacent energy storage elements on the other side in the second direction can be suppressed, thereby suppressing the adjacent energy storage elements on the other side in the second direction from being affected by the heat of the gas.

[0017] (5) In the energy storage equipment described in any one of (1) to (4) above, the shelf may have a pair of side walls protruding toward the other side of the first direction toward both sides of the opening in a third direction intersecting the first direction.

[0018] According to this, since the shelf board has a pair of side walls protruding toward both sides of the opening in the third direction, the pair of side walls can suppress the flow of gas in the third direction.

[0019] (6) In the energy storage equipment described in any one of (1) to (5) above, the energy storage device may further include a guide portion disposed between the energy storage element and the wall member and configured to guide gas from the gas exhaust valve to the opening.

[0020] According to this, since the electricity storage device includes the guide portion, the gas from the gas exhaust valve can be easily guided to the opening.

[0021] Hereinafter, a description will be given of an energy storage facility according to an embodiment (including modified examples) of the present invention with reference to the drawings. The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, the arrangement and connection forms of the components, manufacturing processes, the order of the manufacturing processes, and the like shown in the following embodiments are merely examples and are not intended to limit the present invention. In each drawing, the dimensions, etc. are not strictly illustrated. In each drawing, the same or similar components are given the same reference numerals.

[0022] In the following description and drawings, the X-axis direction is defined as the arrangement direction of multiple energy storage devices arranged on one shelf, the arrangement direction of a pair of terminals (positive and negative) in one energy storage element, the opposing direction of short side surfaces of the container of the energy storage element, or the short side direction of the energy storage device. The Y-axis direction is defined as the opposing direction of the front cover and rear cover of the rack, the insertion direction in which the energy storage device is inserted into the shelf, the arrangement direction of multiple energy storage elements included in the energy storage device, the opposing direction of long side surfaces of the container of the energy storage element, or the longitudinal direction of the energy storage device. The Z-axis direction is defined as the arrangement direction of multiple shelves, the arrangement direction of the energy storage element and the bus bar included in the energy storage device, the arrangement direction of the main body and the lid of the container of the energy storage element, the arrangement direction of the main body and the lid of the exterior body (first exterior body, second exterior body) of the energy storage device, or the up-down direction. The X-axis direction, the Y-axis direction, and the Z-axis direction intersect each other (orthogonal in this embodiment).

[0023] 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 opposite direction to the positive X-axis direction. When simply referring to the X-axis direction, it refers to both or either of the positive X-axis direction and the negative X-axis direction. The same applies to the Y-axis and Z-axis directions. Hereinafter, the Z-axis direction is also referred to as 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), the Y-axis direction is also referred to as the second direction, and the X-axis direction is also referred to as the third direction. Expressions indicating relative directions or attitudes, such as parallel and perpendicular, also include cases where the directions or attitudes are not strictly the same. Two directions being parallel not only means that the two directions are completely parallel, but also means that the directions are substantially parallel, that is, that there is a difference of about a few percent. In the following description, when the word "insulation" is used, it means "electrical insulation". An insulating material has a volume resistivity of 1×10 10 It is preferable that the material used is one having a resistance of Ωm or higher.

[0024] (Embodiment) [1 Explanation of the power storage facility 900] First, a general description will be given of a power storage facility 900 according to this embodiment. Fig. 1 is a perspective view showing the external appearance of a power storage facility 900 according to this embodiment.

[0025] The power storage facility 900 is a facility that charges and discharges electricity and supplies power to an external power load, and in this embodiment, has a rectangular parallelepiped shape. A rectangular parallelepiped is a hexahedron with all faces formed of rectangles or squares. The power storage facility 900 is used for power storage purposes or power supply purposes. Specifically, the power storage facility 900 is used as a stationary battery for home or business use. In this embodiment, the power storage facility 900 is a stationary storage battery panel that stores power generated by wind power generation or solar power generation, and stably supplies power to external facilities. The power stored by the power storage facility 900 is not limited to power derived from these renewable energies, and may store power from a power system or regenerative power in a railway system. The power storage facility 900 can also be used as a battery for driving or starting an engine of a large moving object such as a ship or a railway car for an electric railway. Examples of the above-mentioned electric railway vehicles include electric trains, monorails, linear motor cars, and hybrid electric trains equipped with both a diesel engine and an electric motor.

[0026] 1, the power storage facility 900 includes a rack 901 and a plurality of power storage devices 1. The rack 901 is a rectangular parallelepiped container that houses the plurality of power storage devices 1, and is formed from metal members such as stainless steel, aluminum, aluminum alloy, iron, and plated steel plate. The shape of the rack 901 is not limited to a rectangular parallelepiped, and may be a polygonal prism shape other than a rectangular parallelepiped, an elongated cylindrical shape, an elliptical cylindrical shape, a cylindrical shape, or the like. The rack 901 is not limited to being made of metal, and any of the members constituting the rack 901 may be made of resin or the like, but it is preferable that the rack 901 be formed from a member having high strength and heat resistance.

[0027] The rack 901 includes a rack body 910, a pair of front covers 920, a pair of rear covers 930, and a plurality of shelf boards 940. A pair of front covers 920 aligned in the X-axis direction are arranged on the front of the rack body 910, but in FIG. 1, the front cover 920 in the positive direction of the X-axis is omitted from the illustration. A plurality of power storage devices 1 are arranged (placed) aligned in the X-axis direction on each shelf board 940, but in FIG. 1, three power storage devices 1 are illustrated for simplicity. The number of power storage devices 1 arranged on each shelf board 940 is not particularly limited, and a large number of power storage devices 1 may be arranged, only one power storage device 1 may be arranged, or there may be a shelf board 940 on which no power storage device 1 is arranged.

[0028] The rack body 910 is a rectangular box body having a flat, rectangular rack bottom wall 911 in the negative Z-axis direction, a flat, rectangular rack top wall 912 in the positive Z-axis direction, and a pair of flat, rectangular rack side walls 913 on both sides in the X-axis direction. As a result, openings are provided on the front (surface in the negative Y-axis direction) and back (surface in the positive Y-axis direction) of the rack body 910. The front opening of the rack body 910 is covered (closed) by a pair of front covers 920. The pair of front covers 920 are flat, rectangular members aligned in the X-axis direction, and are attached to the front of the rack body 910 in an openable (openable and closable) manner so as to open and close the front opening of the rack body 910. The rear opening of the rack body 910 is covered (closed) by a pair of rear covers 930. The pair of rear covers 930 are flat, rectangular members aligned in the X-axis direction, and are attached to the rear of the rack body 910 in an openable / closable manner (openable / closable manner) so as to open and close the opening on the rear side of the rack body 910.

[0029] The shelf board 940 is a support member on which a plurality of power storage devices 1 are arranged (placed) above (positive direction of Z axis) and supports the plurality of power storage devices 1 from below (negative direction of Z axis). Inside the rack body 910, a plurality of shelf boards 940 are arranged in the Z axis direction (first direction) at a predetermined interval. The shelf board 940 is a flat rectangular member parallel to the XY plane, and a plurality of power storage devices 1 can be arranged in the X axis direction and placed on one shelf board 940. As described later, the shelf board 940 is preferably formed of a non-flammable member having high heat resistance because the gas discharged from the power storage device 1 passes through the shelf board 940. In other words, the shelf board 940 is preferably formed of a member of a material that does not melt (or does not deform) at the temperature of the high-temperature gas discharged from the power storage device 1. Furthermore, the shelf board 940 is preferably formed of a member having high heat dissipation properties. Therefore, the shelf board 940 may be formed from a material that has higher heat resistance than the other members of the rack 901 other than the shelf board 940, or may be formed from a material that has higher heat dissipation properties.

[0030] The front cover 920 is provided with a plurality of openings 925 for ventilation. The openings 925 are slits arranged in the front cover 920 in the X-axis direction and the Z-axis direction and are long in the Z-axis direction. Similarly, the rear cover 930 is provided with openings (not shown). The openings 925 of the front cover 920 face the end of the power storage device 1 placed on the shelf board 940 in the negative direction of the Y-axis, and the openings of the rear cover 930 face the end of the power storage device 1 in the positive direction of the Y-axis. This allows the heat released from the power storage device 1 to be smoothly discharged from these openings to the outside of the rack 901. In particular, the openings of the rear cover 930 are used as exhaust ports for discharging gas to the outside of the rack 901 when the gas is discharged from the power storage device 1.

[0031] In addition to the multiple power storage devices 1, an electric circuit unit (not shown) connected to the multiple power storage devices 1 and the like are housed inside the rack body 910. The electric circuit unit houses a circuit breaker, a control circuit, and the like. The circuit breaker is disposed on a main circuit through which a main current flows for charging and discharging each power storage device 1, and the control circuit is connected to the board unit 20 (see FIG. 2) of each power storage device 1 by a signal line (not shown).

[0032] The power storage device 1 is a device that can be charged with electricity from an external source and can discharge electricity to the outside, and is used for power storage purposes, power supply purposes, etc. In this embodiment, the power storage device 1 is a battery module (battery assembly) that is substantially rectangular parallelepiped-shaped and elongated in the Y-axis direction. The configuration of the power storage device 1 will be described in detail below.

[0033] [2. Description of the storage device 1] Fig. 2 is a perspective view showing the appearance of the energy storage device 1 according to the present embodiment. Fig. 3 is an exploded perspective view showing each component of the energy storage unit 10 included in the energy storage device 1 according to the present embodiment.

[0034] As shown in FIG. 2, the energy storage device 1 includes an energy storage unit 10 and a board unit 20 attached to the energy storage unit 10. The energy storage unit 10 has a generally rectangular parallelepiped shape that is elongated in the Y-axis direction. The board unit 20 is a device that can monitor the state of the energy storage elements 100 included in the energy storage unit 10 and control the energy storage elements 100, and includes a circuit board and the like inside. In this embodiment, the board unit 20 is a flat rectangular member that is attached to the end of the energy storage unit 10 in the longitudinal direction, that is, the side surface of the energy storage unit 10 in the negative Y-axis direction. As shown in FIG. 3, the energy storage unit 10 includes a plurality of energy storage elements 100, a plurality of spacers 200, an exterior body 600 including a first exterior body 300 and a second exterior body 500, a plurality of bus bars 400, and cables 410 and 420. The energy storage unit 10 may include a restraining member (end plate, side plate, etc.) that restrains the plurality of energy storage elements 100.

[0035] The energy storage element 100 is a secondary battery (single cell) capable of charging and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The energy storage element 100 has a flat rectangular parallelepiped shape (rectangular shape), and in this embodiment, a plurality (14 pieces) of the energy storage elements 100 are arranged in the Y-axis direction. The size, shape, and number of the energy storage elements 100 arranged are not limited, and only one energy storage element 100 may be arranged. The energy storage element 100 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 100 may be a primary battery. The energy storage element 100 may be a battery using a solid electrolyte. The energy storage element 100 may be a pouch-type energy storage element. A detailed description of the configuration of the energy storage element 100 will be given later.

[0036] The spacers 200 (210, 220) are disposed adjacent to the energy storage elements 100 in the Y-axis direction and are flat, rectangular members (insulating or insulating plates) that insulate and / or insulate the energy storage elements 100 from other members. The spacer 210 of the spacers 200 is a flat, rectangular spacer (middle spacer) parallel to the XZ plane that is disposed between two adjacent energy storage elements 100 and provides thermal insulation and / or insulation between the two energy storage elements 100. The spacer 210 is not limited to being disposed between all the energy storage elements 100, and may be configured such that the spacer 210 is not disposed between any of the energy storage elements 100. The spacer 220 of the spacers 200 is a flat, rectangular spacer (end spacer) parallel to the XZ plane that is disposed between the end energy storage elements 100 and the side wall of the second exterior body 500 and provides thermal insulation and / or insulation between them. The spacers 200 (210, 220) are formed of a material having thermal insulation properties, such as glass wool or mica, or a material having insulating properties, such as any resin material that can be used for the first exterior body 300 described below. The spacers 200 (210, 220) may all be formed of materials made of the same material, or any of them may be formed of materials made of different materials.

[0037] The exterior body 600 is disposed outside the multiple energy storage elements 100 and the multiple spacers 200, and is a member (case) that constitutes a housing (outer shell of the energy storage unit 10) that covers the multiple energy storage elements 100, etc. As described above, the exterior body 600 includes a first exterior body 300 and a second exterior body 500. The first exterior body 300 is a member (inner case) that constitutes the inner housing (outer shell) of the exterior body 600, and the second exterior body 500 is a member (outer case) that constitutes the outer housing (outer shell) of the exterior body 600. The exterior body 600 accommodates the multiple energy storage elements 100 and the multiple spacers 200 by the first exterior body 300 and the second exterior body 500.

[0038] The first exterior body 300 is disposed on both sides of the energy storage elements 100 in the Z-axis direction so as to sandwich the energy storage elements 100 and the spacers 200 in the Z-axis direction, and covers both ends of the energy storage elements 100, etc. in the Z-axis direction. In this way, the first exterior body 300 fixes the energy storage elements 100 and the spacers 200 at predetermined positions. The first exterior body 300 is formed of an insulating member 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), polyamide (PA), ABS resin, or a composite material thereof, or a metal with an insulating coating. The first exterior body 300 thereby prevents the energy storage elements 100 and the like from coming into contact with external metal members, etc. The first exterior body 300 may be formed of a conductive member such as a metal as long as the insulating properties of the energy storage elements 100 and the like are maintained.

[0039] The first exterior body 300 includes a first lower exterior body 310 and a first upper exterior body 320. The first lower exterior body 310 is a lower member of the first exterior body 300, and constitutes the main body of the first exterior body 300. The first upper exterior body 320 is an upper member of the first exterior body 300, and constitutes a lid body of the first exterior body 300. The first lower exterior body 310 and the first upper exterior body 320 may be formed from members made of the same material, or may be formed from members made of different materials.

[0040] Specifically, the first lower exterior body 310 is a rectangular tray (box) whose entire surface in the positive Z-axis direction is open and whose surface in the negative Z-axis direction is closed. The first lower exterior body 310 is disposed in the negative Z-axis direction of the multiple energy storage elements 100 and the multiple spacers 200, and is a box-shaped (flattened, approximately rectangular parallelepiped) tray that is long in the Y-axis direction and shallow in depth, supporting the multiple energy storage elements 100 and the multiple spacers 200. The first lower exterior body 310 is placed on a second lower exterior body 510 of the second exterior body 500, which will be described later.

[0041] The first lower exterior body 310 includes a first bottom wall 311, a pair of first lower side walls 312, and a pair of first lower side walls 313. The first bottom wall 311 is a flat, rectangular portion parallel to the XY plane and extending in the Y-axis direction, and constitutes the bottom wall of the first exterior body 300. The first bottom wall 311 is disposed between the plurality of energy storage elements 100 and the plurality of spacers 200 and a second bottom wall 511 of the second lower exterior body 510 described later, and supports the plurality of energy storage elements 100 and the plurality of spacers 200 from below. The pair of first lower side walls 312 are flat, rectangular portions that protrude in the Z-axis positive direction from both ends of the first bottom wall 311 in the Y-axis direction, and extend in the X-axis direction parallel to the XZ plane, and constitute the short side walls of the first lower exterior body 310. The pair of first lower side walls 312 are disposed at positions sandwiching the plurality of energy storage elements 100 and the plurality of spacers 200 in the Y-axis direction. The pair of first lower side walls 313 are long, flat plate-like portions that protrude in the positive Z-axis direction from both ends of the first bottom wall 311 in the X-axis direction, are parallel to the YZ plane, and extend in the Y-axis direction, and constitute long side walls of the first lower exterior body 310. The pair of first lower side walls 313 are disposed at positions sandwiching the multiple energy storage elements 100 and the multiple spacers 200 in the X-axis direction.

[0042] The first upper exterior body 320 is disposed in the Z-axis positive direction of the energy storage elements 100 and the spacers 200, and is a box-shaped (flattened, approximately rectangular parallelepiped) member that is elongated in the Y-axis direction and supported by the energy storage elements 100. The first upper exterior body 320 is disposed between the energy storage elements 100 and a second upper exterior body 520 of the second exterior body 500 described later, and therefore can also be said to be an inner lid of the energy storage unit 10. In this embodiment, the first upper exterior body 320 is a bus bar frame (also referred to as a bus bar holder or a bus bar plate), and insulates the bus bar 400 from other members, and regulates the position of the bus bar 400. Specifically, the first upper exterior body 320 is disposed on the energy storage elements 100 and positioned relative to the energy storage elements 100, and the bus bars 400 are positioned relative to the first upper exterior body 320. As a result, each bus bar 400 is positioned relative to the multiple energy storage elements 100 and joined to the terminals 140 provided on the multiple energy storage elements 100.

[0043] The first upper exterior body 320 includes a first wall member 321 and a pair of first upper side walls 322. The first wall member 321 is a flat, rectangular portion parallel to the XY plane and extending in the Y-axis direction, and constitutes an upper wall of the first exterior body 300. The first wall member 321 is disposed between the plurality of energy storage elements 100 and the plurality of spacers 200 and a second wall member 521 of the second upper exterior body 520 of the second exterior body 500 described later, and is supported from below by the plurality of energy storage elements 100. The first wall member 321 includes a plurality of guide portions 321a arranged in the Y-axis direction. A detailed description of the configuration of the guide portions 321a will be given later. The pair of first upper side walls 322 are elongated flat portions that protrude from both ends of the first wall member 321 in the X-axis direction on both sides in the Z-axis direction and extend in the Y-axis direction in the YZ plane. The pair of first upper side walls 322 are disposed at positions sandwiching the plurality of energy storage elements 100 in the X-axis direction (see FIG. 6).

[0044] The second exterior body 500 is a member that supports and protects (reinforces) the first exterior body 300. The second exterior body 500 is formed of metal members such as stainless steel, aluminum, aluminum alloy, iron, plated steel sheet, etc. The second exterior body 500 includes a second lower exterior body 510 and a second upper exterior body 520. The second lower exterior body 510 is a lower member of the second exterior body 500 and constitutes the main body of the second exterior body 500. The second upper exterior body 520 is an upper member of the second exterior body 500 and constitutes a lid of the second exterior body 500. The second lower exterior body 510 and the second upper exterior body 520 may be formed of members made of the same material or may be formed of members made of different materials.

[0045] Specifically, the second lower exterior body 510 is a member on which the first lower exterior body 310 is disposed and which supports the first lower exterior body 310 from below. The second lower exterior body 510 includes a second bottom wall 511, connection parts 512 and 513, and a pair of second lower side walls 514. The second bottom wall 511 is a flat, rectangular part parallel to the XY plane and extending in the Y-axis direction, and constitutes the bottom wall of the second exterior body 500. The second bottom wall 511 is disposed in the Z-axis negative direction of the first bottom wall 311 of the first lower exterior body 310, and supports the first lower exterior body 310 from below. The connection part 512 is a plate-shaped part that rises in the Z-axis positive direction from the Y-axis negative end of the second bottom wall 511 and protrudes in the Y-axis negative direction, and is connected to the second upper exterior body 520. The connecting portion 513 is a plate-like portion that rises in the Z-axis positive direction from the Y-axis positive direction end of the second bottom wall 511 and protrudes in the Y-axis positive direction, and is connected to the second upper exterior body 520. The pair of second lower side walls 514 are long, flat plate-like portions that protrude in the Z-axis positive direction from both ends of the second bottom wall 511 in the X-axis direction and extend in the Y-axis direction parallel to the YZ plane. The pair of second lower side walls 514 are disposed at positions sandwiching the pair of first lower side walls 313 in the X-axis direction (see FIG. 6).

[0046] The second upper exterior body 520 is a member that presses and supports the first upper exterior body 320 from above the first upper exterior body 320. The second upper exterior body 520 includes a second wall member 521, connection portions 522 and 523, and a pair of second upper side walls 524. The second wall member 521 is a flat, rectangular portion that is parallel to the XY plane and extends in the Y-axis direction, and is disposed in the Z-axis positive direction of the first upper exterior body 320 to form an upper wall (upper surface portion (outer lid) of the power storage unit 10) of the second exterior body 500 (exterior body 600). The second wall member 521 is provided with a plurality of lid portions 521a aligned in the Y-axis direction. A detailed description of the configuration of the lid portions 521a will be given later.

[0047] The connection portion 522 is a portion that extends in the negative Z-axis direction from the negative Y-axis end of the second wall member 521 and protrudes in the negative Y-axis direction, and is connected to the connection portion 512 of the second lower exterior body 510. The connection portion 523 is a portion that extends in the negative Z-axis direction from the positive Y-axis end of the second wall member 521 and protrudes in the positive Y-axis direction, and is connected to the connection portion 513 of the second lower exterior body 510. The pair of second upper side walls 524 are elongated flat plate-shaped portions that protrude in the negative Z-axis direction from both ends of the second wall member 521 in the X-axis direction, and extend in the Y-axis direction parallel to the YZ plane. The pair of second upper side walls 524 are disposed at positions sandwiching the pair of first upper side walls 322 in the X-axis direction (see FIG. 6).

[0048] In this manner, the second lower exterior body 510 and the second upper exterior body 520 are configured to be fixed by connecting (joining) the connection parts 512 and 513 and the connection parts 522 and 523 with screws or the like in a state in which the first lower exterior body 310 and the first upper exterior body 320 are sandwiched in the Z-axis direction. In this manner, the second exterior body 500 supports (holds) the first exterior body 300.

[0049] The bus bar 400 is a rectangular plate-like member disposed on the plurality of energy storage elements 100 and electrically connects the terminals 140 of the plurality of energy storage elements 100 to each other. In the present embodiment, the bus bar 400 and the terminals 140 are connected (joined) with bolts, but may be connected (joined) by welding or the like. The bus bar 400 is formed of a conductive member made of metal such as aluminum, an aluminum alloy, copper, a copper alloy, nickel, or a combination thereof, or a conductive member other than a metal. In the present embodiment, the bus bar 400 connects the terminals 140 of the adjacent energy storage elements 100 to each other, thereby connecting the 14 energy storage elements 100 in series, but the connection mode of the energy storage elements 100 is not limited to the above, and any combination of series connection and parallel connection may be used.

[0050] The terminals 140 of the energy storage elements 100 located at both ends in the Y-axis direction among the multiple energy storage elements 100 are connected to the cables 410 and 420, so that the energy storage device 1 can charge with electricity from the outside and discharge electricity to the outside. The cables 410 and 420 are positive and negative electric wires (power cables) through which current flows for charging and discharging the energy storage device 1 (energy storage elements 100).

[0051] [3. Description of the Energy Storage Element 100] Next, the configuration of the energy storage element 100 will be described in detail. Fig. 4 is a perspective view showing the configuration of the energy storage element 100 according to the present embodiment. Fig. 4 shows an enlarged external view of one of the energy storage elements 100 shown in Fig. 3. Since the multiple energy storage elements 100 all have the same configuration, the configuration of one energy storage element 100 will be described in detail below.

[0052] As shown in FIG. 4, the energy storage element 100 includes a container 110 and a pair of terminals 140 (positive and negative electrodes). The container 110 contains an electrode body, a pair of current collectors (positive and negative electrodes), and an electrolyte (non-aqueous electrolyte), but these are not shown in the figure. The electrolyte is not particularly limited in type as long as it does not impair the performance of the energy storage element 100, and various electrolytes can be selected. The energy storage element 100 includes an insulating gasket that insulates and seals between the container 110 and the terminals 140 and the current collectors, but this is also not shown in the figure. In addition to the above-mentioned components, the energy storage element 100 may include a spacer disposed on the side or below the electrode body, an insulating film that wraps the electrode body, and the like. An insulating film (shrink tube, etc.) that covers the outer surface of the container 110 may be disposed around the container 110.

[0053] The container 110 is a rectangular parallelepiped (angular or box-shaped) case including a container body 120 with an opening formed therein and a container lid 130 that closes the opening of the container body 120. The container body 120 is a rectangular cylindrical member with a bottom that constitutes the main body of the container 110, and an opening is formed on the surface in the positive direction of the Z axis. The container lid 130 is a rectangular plate-like member that is long in the X-axis direction and constitutes the lid of the container 110, and is disposed in the positive direction of the Z axis of the container body 120. The material of the container 110 (the container body 120 and the container lid 130) is not particularly limited, and may be a weldable (joinable) metal such as stainless steel, aluminum, aluminum alloy, iron, or plated steel sheet, but may also be a resin. The container 110 is structured such that the inside is sealed by accommodating an electrode body or the like inside the container body 120 and then joining the container body 120 and the container lid 130 by welding or the like. The container 110 has a pair of long sides 111 on both sides in the Y-axis direction, a pair of short sides 112 on both sides in the X-axis direction, and a bottom surface 113 in the negative Z-axis direction. The long sides 111 are rectangular flat surfaces parallel to the XZ plane. The short sides 112 are rectangular flat surfaces parallel to the YZ plane. The bottom surface 113 is a rectangular flat surface parallel to the XY plane.

[0054] The container lid 130 is provided with a gas exhaust valve 131. The gas exhaust valve 131 is a part for releasing pressure when the pressure inside the container 110 rises excessively. In the present embodiment, the gas exhaust valve 131 is disposed between a pair of terminals 140 in an orientation facing upward (positive direction of the Z axis). The multiple energy storage elements 100 are arranged with the respective gas exhaust valves 131 facing in the same direction (positive direction of the Z axis). The container lid 130 may be provided with a liquid injection section or the like for injecting an electrolyte into the container 110.

[0055] The terminals 140 are electrode terminals (positive and negative terminals) of the energy storage element 100 arranged on the container lid 130, and are electrically connected to the positive and negative plates of the electrode body via current collectors. A pair of terminals 140 are arranged to protrude upward from the container lid 130. The terminals 140 are metallic (conductive) members for conducting electricity stored in the electrode body to the external space of the energy storage element 100 and for introducing electricity into the internal space of the energy storage element 100 to store electricity in the electrode body. The terminals 140 are formed of aluminum, an aluminum alloy, copper, a copper alloy, or the like.

[0056] The electrode body is an electric storage element (power generating element) formed by laminating a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is a positive electrode active material layer formed on a current collector foil made of a metal such as aluminum or an aluminum alloy. The negative electrode plate is a negative electrode active material layer formed on a current collector foil made of a metal such as copper or a copper alloy. As the active material used in the positive electrode active material layer and the negative electrode active material layer, any known material can be used as long as it can absorb and release lithium ions. The separator can be a microporous sheet or nonwoven fabric made of a resin. In this embodiment, the electrode body is formed by laminating electrode plates (positive electrode plate and negative electrode plate) in the Y-axis direction. The electrode body may be any type of electrode body, such as a wound type electrode body formed by winding electrode plates (positive electrode plate and negative electrode plate), a stack type electrode body formed by stacking a plurality of flat electrode plates, or a bellows type electrode body in which the electrode plates are folded in a bellows shape.

[0057] The current collectors are conductive members (positive and negative current collectors) electrically connected to the terminal 140 and the electrode body. The positive current collector is made of aluminum or an aluminum alloy, etc., like the current collector foil of the positive electrode plate, and the negative current collector is made of copper or a copper alloy, etc., like the current collector foil of the negative electrode plate.

[0058] [4. Description of the lid portion 521a and the guide portion 321a] Next, the configuration of the lid portion 521a provided on the second wall member 521 of the second upper exterior body 520 and the guide portion 321a provided on the first wall member 321 of the first upper exterior body 320 will be described in detail. FIG. 5 is a plan view showing the configuration of the lid portion 521a provided on the second wall member 521 of the second upper exterior body 520 and the guide portion 321a provided on the first wall member 321 of the first upper exterior body 320 according to the present embodiment. FIG. 5 is a view of the energy storage device 1 (energy storage unit 10) seen from the positive direction of the Z axis, but shows a simplified view in which the bus bar 400 and the cable 410 are omitted. FIGS. 6 and 7 are cross-sectional views showing the configuration of the lid portion 521a provided on the second wall member 521 of the second upper exterior body 520 and the guide portion 321a provided on the first wall member 321 of the first upper exterior body 320 according to the present embodiment. Fig. 6 is a cross-sectional view showing the configuration of the power storage device 1 (power storage unit 10) shown in Fig. 5 when cut along a plane including line VI-VI and parallel to the XZ plane. Fig. 7 is a cross-sectional view showing the configuration of the power storage device 1 (power storage unit 10) shown in Fig. 5 when cut along a plane including line VII-VII and parallel to the YZ plane.

[0059] As shown in FIG. 5 to FIG. 7, the lid portion 521a is a plate-like portion that is provided on the second wall member 521 of the second upper exterior body 520 and has a quadrangular (square) shape when viewed from the Z-axis direction. The lid portion 521a is formed by cutting out three sides of the quadrangular (square) shape in the second wall member 521. In this embodiment, the three sides of the quadrangular (square) shape are cut out except for the side of the end 521c in the negative Y-axis direction, so that the second wall member 521 is provided with a quadrangular (square) opening 521b and the lid portion 521a that closes the opening 521b. As a result, the lid portion 521a is configured to open from the end 521d in the Y-axis direction (second direction intersecting with the first direction). In this embodiment, the end 521d is the end of the lid portion 521a in the positive Y-axis direction.

[0060] The gas exhaust valve 131 provided in the container 110 of the energy storage element 100 is disposed at a position facing the second wall member 521, and the opening 521b and the lid portion 521a are disposed at a position facing the gas exhaust valve 131. A plurality of sets of openings 521b and lid portions 521a are disposed aligned in the Y axis direction (second direction) corresponding to the gas exhaust valves 131 provided in the plurality of energy storage elements 100 aligned in the Y axis direction (second direction). The openings 521b and the lid portion 521a are larger in size than the gas exhaust valve 131 as viewed from the Z axis direction, and are disposed so as to cover the entire gas exhaust valve 131. The lid portion 521a is disposed apart from the gas exhaust valve 131, and the guide portion 321a is disposed between the lid portion 521a and the gas exhaust valve 131.

[0061] The guide portion 321a is provided on the first wall member 321 of the first upper exterior body 320, and is a cylindrical portion that is annular when viewed from the Z-axis direction and extends in the Z-axis direction. The guide portion 321a is arranged so as to surround the periphery of the gas release valve 131 when viewed from the Z-axis direction. In the present embodiment, the guide portion 321a is a cylindrical portion that is annular when viewed from the Z-axis direction and extends in the Z-axis direction so as to surround the periphery of the gas release valve 131 that is circular when viewed from the Z-axis direction. A plurality of guide portions 321a are arranged in the Y-axis direction (second direction) in correspondence with the respective gas release valves 131 provided on the plurality of energy storage elements 100 arranged in the Y-axis direction (second direction).

[0062] Guide portion 321a protrudes in the negative Z direction from the surface of first wall member 321 in the negative Z direction and is in contact with container 110 of energy storage element 100 or is arranged in the vicinity of container 110. Guide portion 321a protrudes in the positive Z direction from the surface of first wall member 321 in the positive Z direction and is in contact with lid portion 521a of second wall member 521 or is arranged in the vicinity of lid portion 521a. In this manner, guide portion 321a is arranged between energy storage element 100 and second wall member 521, and guides gas from gas discharge valve 131 to opening 521b.

[0063] The guide portion 321a is not limited to a cylindrical shape, and may be appropriately changed to an elongated cylindrical shape, an elliptical cylindrical shape, a square cylindrical shape, or other polygonal cylindrical shape, etc., depending on the shape of the gas exhaust valve 131, etc. The guide portion 321a is not limited to a cylindrical shape, and may be a plate-shaped member, etc. The guide portion 321a may not protrude in the negative Z-axis direction from the surface of the first wall member 321 in the negative Z-axis direction, or may not protrude in the positive Z-axis direction from the surface of the first wall member 321 in the positive Z-axis direction. The shapes of the opening 521b and the lid portion 521a are not limited to a square shape, and may be appropriately changed to a rectangular shape, other polygonal shapes, a circular shape, an oval shape, an elliptical shape, etc., depending on the shape of the guide portion 321a, etc.

[0064] [5. Description of the Configuration of the Shelf Board 940 and its Positional Relationship with the Electricity Storage Device 1] Next, the configuration of the shelf board 940 and the positional relationship between the shelf board 940 and the energy storage device 1 will be described in detail. FIG. 8 is a cross-sectional view showing the configuration of the shelf board 940 according to this embodiment and the positional relationship between the shelf board 940 and the energy storage device 1. FIGS. 9 and 10 are cross-sectional views showing the positional relationship between the shelf board 940 and the energy storage device 1 according to this embodiment. FIGS. 8 and 9 are cross-sectional views showing a configuration in which the energy storage device 1 is arranged on a plurality of shelf boards 940, cut along a plane corresponding to FIGS. 6 and 7. FIG. 10 shows two shelf boards 940 and one energy storage device 1 of the configuration shown in FIG. 9. FIG. 10 shows a state in which gas is discharged from one energy storage element 100.

[0065] 8 and 9, when the energy storage device 1 is accommodated in the rack 901, the shelf board 940 is arranged in the positive direction of the Z axis of the energy storage device 1 (one side in the first direction). As a result, the second wall member 521 of the energy storage device 1 is arranged between the energy storage elements 100 and the shelf board 940. The second wall member 521 is an example of a wall member arranged between the energy storage elements 100 and the shelf board 940. In other words, the opening portion 521b and the lid portion 521a of the second wall member 521 are arranged between the gas discharge valve 131 of the energy storage element 100 and the shelf board 940.

[0066] As shown in FIG. 8, the shelf board 940 includes a shelf board main body 941 and a pair of side walls 942. The shelf board main body 941 is a flat, rectangular part parallel to the XY plane, and the power storage device 1 is placed (placed) on the upper part thereof to support the power storage device 1. The pair of side walls 942 are elongated flat parts that protrude in the negative Z-axis direction from the shelf board main body 941 and extend in the Y-axis direction parallel to the YZ plane. The pair of side walls 942 protrude in the negative Z-axis direction (the other side of the first direction) toward both sides (outsides) of the opening 521b in the X-axis direction (a third direction intersecting the first direction and the second direction). That is, the pair of side walls 942 are disposed on both sides (outsides) of the opening 521b in the X-axis direction when viewed from the Z-axis direction. In the present embodiment, the pair of side walls 942 protrude in the negative Z direction toward both sides (outsides) of the energy storage device 1 in the X direction (disposed on both sides of the energy storage device 1 in the X direction when viewed from the Z direction). The pair of side walls 942 extend continuously from one end to the other end of the energy storage unit 10 in the Y direction. The pair of side walls 942 protrude in the negative Z direction to a position in the negative Z direction beyond the surface of the second wall member 521 in the positive Z direction.

[0067] 9, the length of lid portion 521a in the Y-axis direction (second direction) is greater than the distance between opening 521b and shelf 940. The length of lid portion 521a in the Y-axis direction is the length of lid portion 521a in the Y-axis direction when lid portion 521a covers opening 521b. In other words, the length of lid portion 521a in the Y-axis direction is the length between end 521c and end 521d of lid portion 521a, which is length A in FIG. 9. The distance between opening 521b and shelf 940 is the distance (shortest distance) between opening 521b and shelf 940 in the Z-axis direction, which is distance B in FIG. 9.

[0068] In this configuration, when gas is discharged from gas discharge valve 131 of energy storage element 100, as shown in FIG. 10, the gas is guided to lid portion 521a by guide portion 321a. As a result, the gas pushes up lid portion 521a, and lid portion 521a opens toward shelf plate 940. Specifically, lid portion 521a bends at end 521c in the negative Y-axis direction, and end 521d in the positive Y-axis direction moves upward, thereby opening upward from end 521d. At this time, since the length between end 521c and end 521d of lid portion 521a (length A in FIG. 9) is greater than the distance between opening 521b and shelf plate 940 (distance B in FIG. 9), lid portion 521a does not open more than 90°. As a result, the gas that has passed through the opening 521b is prevented from flowing in the negative Y-axis direction by the cover 521a, and flows between the shelf body 941 of the shelf 940 and the second wall member 521 in the positive Y-axis direction.

[0069] [6 Explanation of Effects] As described above, according to the energy storage facility 900 of the present embodiment, the energy storage device 1 includes the second wall member 521 (an example of a wall member) between the energy storage element 100 and the shelf board 940, facing the gas discharge valve 131 of the energy storage element 100. The second wall member 521 is provided with the lid portion 521a that closes the opening portion 521b and opens toward the shelf board 940. With this configuration, the gas from the gas discharge valve 131 of the energy storage element 100 is discharged from the opening portion 521b of the second wall member 521 toward the shelf board 940, so that even if the gas is high in temperature, the second wall member 521 can be prevented from being overheated by the gas. Therefore, the energy storage device 1 can be prevented from being overheated.

[0070] If the energy storage device 1 can be prevented from being overheated, it is possible to prevent the thermal effects on components near the energy storage element 100 from which gas has been discharged (such as other adjacent energy storage elements 100). It is also possible to prevent the thermal effects on components near the energy storage device 1 (such as other adjacent energy storage devices 1). Since the shelf boards 940 can be used to form a gas discharge path, it is possible to simplify the structure of the energy storage equipment 900 (energy storage device 1) and reduce the size (space) of the energy storage equipment 900 (energy storage device 1).

[0071] By arranging the opening 521b of the second wall member 521 opposite the gas exhaust valve 131 of the energy storage element 100, the gas from the gas exhaust valve 131 can be smoothly exhausted toward the opening 521b.

[0072] The length of lid portion 521a of second wall member 521 in the Y-axis direction (second direction) is greater than the distance between opening 521b of second wall member 521 and shelf board 940, so that when lid portion 521a is opened, end portion 521d of lid portion 521a is disposed near shelf board 940 or comes into contact with shelf board 940. This makes it possible to restrict the direction of gas flow, for example by preventing gas flowing in from opening 521b from flowing in the direction of a heat-sensitive member such as a substrate.

[0073] By arranging a plurality of energy storage elements 100 in the Y-axis direction (second direction), when gas flows in the positive Y-axis direction (one side in the second direction) and gas flow in the negative Y-axis direction (the other side in the second direction) is suppressed, gas flow toward adjacent energy storage elements 100 in the negative Y-axis direction (the other side in the second direction) can be suppressed. This makes it possible to suppress the thermal effect of gas on adjacent energy storage elements 100 in the negative Y-axis direction (the other side in the second direction).

[0074] Since the shelf board 940 has a pair of side walls 942 protruding toward both sides of the opening 521b in the X-axis direction (third direction), the pair of side walls 942 can suppress the flow of gas in the X-axis direction (third direction).

[0075] Since the power storage device 1 includes the guide portion 321a, the gas from the gas exhaust valve 131 can be easily guided to the opening 521b.

[0076] By providing the opening 521b and the lid 521a in the wall (second wall member 521) of the exterior body 600 of the electricity storage device 1, the gas from the gas exhaust valve 131 can be exhausted to the outside with a simple configuration.

[0077] [7 Explanation of Variations] Although the power storage facility 900 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative and not restrictive in all respects, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0078] In the above embodiment, the rack 901 is provided with a plurality of shelves 940, but it may be provided with only one shelf 940 arranged in the positive direction of the Z axis of the power storage device 1.

[0079] In the above embodiment, the wall member arranged between the energy storage element 100 and the shelf 940 is part of the exterior body 600 provided in the energy storage device 1 (the second wall member 521 of the second upper exterior body 520), but the wall member may also be a plate-shaped member or the like provided in the energy storage device 1.

[0080] In the above embodiment, a plurality of sets of openings 521b and lid portions 521a are arranged in the Y-axis direction corresponding to the gas exhaust valves 131 of the plurality of energy storage elements 100 arranged in the Y-axis direction, but this is not limited to the above. In cases where the gas exhaust valves 131 are not arranged in the Y-axis direction, the openings 521b and lid portions 521a do not have to be arranged in the Y-axis direction. A configuration in which only one set of openings 521b and lid portions 521a is arranged may also be used. The same applies to the guide portion 321a.

[0081] In the above embodiment, the opening 521b and the cover portion 521a are arranged at positions facing the gas exhaust valve 131 of the energy storage element 100, but they may be arranged at positions not facing the gas exhaust valve 131. Similarly, the guide portion 321a may be arranged at a position not corresponding to the gas exhaust valve 131.

[0082] In the above embodiment, the cover 521a opens from the end 521d in the positive Y-axis direction, but it may open from the end 521c in the negative Y-axis direction or from the end in the X-axis direction.

[0083] In the above embodiment, the length of the cover portion 521a in the Y-axis direction (length A) is greater than the distance (distance B) between the opening portion 521b and the shelf 940, but the length A may be the same as the distance B or may be smaller than the distance B.

[0084] In the above embodiment, the energy storage elements 100 are arranged in the Y-axis direction, but may be arranged in the X-axis direction.

[0085] In the above embodiment, the pair of side walls 942 protrude toward both sides (outside) of the power storage device 1 in the X-axis direction, but may protrude toward both sides (outside) of the opening 521b in the X-axis direction. Alternatively, only one of the pair of side walls 942 may be disposed on the shelf board 940, or neither of the pair of side walls 942 may be disposed on the shelf board 940.

[0086] In the above embodiment, the first upper exterior body 320 is integrally provided with the guide portion 321a, but the first upper exterior body 320 may be provided with a separate guide portion 321a. The guide portion 321a may be provided on a member different from the first upper exterior body 320. The guide portion 321a does not have to be provided between the energy storage element 100 and the second wall member 521.

[0087] In the above embodiment, all the energy storage devices 1 and all the shelf boards 940 have the above configuration, but any of the energy storage devices 1 or any of the shelf boards 940 may not have the above configuration. Any of the multiple sets of openings 521b and lid portions 521a may not have the above configuration, any of the multiple guide portions 321a may not have the above configuration, and any of the multiple energy storage elements 100 may not have the above configuration.

[0088] In the above embodiment, the first exterior body 300 (the first lower exterior body 310 and the first upper exterior body 320) is a tray and a bus bar frame that sandwiches the multiple energy storage elements 100 and the multiple spacers 200 in the Z-axis direction, but is not limited thereto. The first upper exterior body 320 may be an insulating member or the like for arranging electrical equipment (electrical components) such as a board, a relay, a fuse, a thermistor, or a harness, instead of a bus bar frame. The first exterior body 300 may not be configured to sandwich the multiple energy storage elements 100, etc., but may be a box-shaped container including the first lower exterior body 310 as a housing that accommodates the multiple energy storage elements 100, etc., and the first upper exterior body 320 as a lid that closes the opening of the housing. Similarly, the second exterior body 500 may be a box-shaped container including the second lower exterior body 510 as a housing, and the second upper exterior body 520 as a lid that closes the opening of the housing. One or both of first lower exterior body 310 and first upper exterior body 320 may not be provided, and second lower exterior body 510 may not be provided.

[0089] In the above embodiment, the energy storage equipment 900 is arranged with the Z-axis direction as the up-down direction, but it may be arranged tilted from the Z-axis direction, or it may be arranged tilted so that the Z-axis direction is horizontal.

[0090] In the above embodiment, the power storage facility 900 is a relatively large facility, but it may be a small facility arranged in an automobile or the like.

[0091] Any combination of the components included in the above-described embodiment and its modified examples is also included within the scope of the present invention. [Industrial Applicability]

[0092] The present invention can be applied to an electricity storage facility in which an electricity storage device including an electricity storage element such as a lithium ion secondary battery is arranged on a shelf board. [Explanation of symbols]

[0093] 1. Energy storage device 10 Energy storage unit 100 Energy storage element 110 Container 131 Gas exhaust valve 140 Terminals 200, 210, 220 Spacer 300 First exterior body 310 First lower exterior body 311 First bottom wall 320 First upper exterior body 321 First wall member 321a Guide part 400 Busbar 500 Second exterior body 510 Second lower exterior body 511 Second bottom wall 512, 513, 522, 523 Connections 520 Second upper exterior body 521 Second wall member 521a Lid 521b opening 521c, 521d end 600 Exterior 900 Energy Storage Equipment 901 Rack 910 Rack body 920 Front cover 925 Opening 930 Back cover 940 Shelf 941 Shelf body 942 Side wall

Claims

1. A power storage device including a power storage element; A shelf board is provided on one side of the power storage device in the first direction, the power storage device includes a wall member disposed between the power storage element and the shelf board, the energy storage element includes a gas exhaust valve facing the wall member, The wall member is provided with an opening and a lid portion that closes the opening and opens toward the shelf board. Energy storage equipment.

2. The opening is disposed at a position opposite the gas exhaust valve. The power storage facility according to claim 1.

3. The lid portion opens from an end portion in a second direction intersecting with the first direction, The length of the cover portion in the second direction is greater than the distance between the opening and the shelf board. The power storage facility according to claim 1 or 2.

4. The power storage device includes a plurality of the power storage elements arranged in the second direction. The power storage facility according to claim 3.

5. The shelf board includes a pair of side walls protruding toward the other side in the first direction toward both sides of the opening in a third direction intersecting the first direction. The power storage facility according to claim 1 or 2.

6. The power storage device further includes a guide portion disposed between the power storage element and the wall member, the guide portion directing gas from the gas exhaust valve to the opening. The power storage facility according to claim 1 or 2.

Images