JP7451934B2 - Energy storage equipment - Google Patents

Description

The present invention relates to power storage equipment.

BACKGROUND ART Conventionally, a power storage device (capacitor module) including a plurality of power storage elements (capacitors) is supported by a support member (wiring board) (for example, see Patent Document 1). The power storage device is housed in a rack of power storage equipment. Specifically, the power storage device is provided with a protrusion (leg) that is bent toward the support member in the rack, and the tip of the protrusion engages with the through hole of the support member. , the power storage device and the support member are positioned.

JP2013-98206A

Here, when engaging the tip of the protrusion with the through hole of the support member, the tip and the through hole must be positioned in advance. During this work, the worker lifts the power storage device on the support member, but if the power storage device becomes heavy, it becomes difficult to lift it, and as a result, positioning work becomes difficult.

Therefore, an object of the present invention is to provide a power storage facility that can facilitate positioning of a power storage device and a support member.

In order to achieve the above object, a power storage facility according to one embodiment of the present invention includes a power storage device including a plurality of power storage elements, and a support member that supports the power storage device, the power storage device including: The support member includes a protrusion that protrudes in the predetermined direction from one end surface of the power storage device in the predetermined direction, and the support member includes a support hole into which the protrusion is inserted from the predetermined direction.

According to this, since the protrusion provided on one end surface of the power storage device protrudes from the one end surface, the protrusion can be easily supported when the power storage device is accommodated by sliding it from a predetermined direction with respect to the support member. It can be inserted into the hole. Positioning work is difficult at one end, which is the back side during insertion, due to spatial constraints, but if the protrusion can be inserted into the support hole by simply sliding as described above, positioning work can be made easier. .

Further, after insertion, since the protrusion is in contact with the support hole, movement of the power storage device can be restricted. In this way, movement of the power storage device relative to the support member can be easily restricted.

The power storage device may have a casing that covers the plurality of power storage elements, and the storage casing may include a protrusion.

According to this, the protrusion provided on the housing can be inserted into the support hole. Therefore, positioning can be performed using a protrusion that has a function other than positioning, which was originally provided in the housing. In other words, one protrusion can serve multiple functions, and the number of parts, size, and weight can be reduced compared to the case where dedicated members are provided for each. Thereby, handling of the power storage device itself during positioning work can be facilitated.

The protrusion may have a tapered shape that becomes thinner toward the tip.

According to this, since the protrusion has a tapered shape, the protrusion can be easily inserted into the support hole. This improves the operability during insertion, so that the protrusion can be inserted into the support hole more reliably.

The protrusion may include an elastic body that is pressed by the support hole when the protrusion is inserted into the support hole.

According to this, since the protrusion is provided with an elastic body that is pressed by the support hole, when the protrusion is inserted into the support hole, the elastic body is elastically deformed and engaged with the support hole. becomes. Thereby, positioning with respect to the support hole can be strengthened. Therefore, it is possible to more reliably restrict movement of the power storage device with respect to the support member.

A periphery of the support hole may be provided with an uneven structure that contacts the protrusion.

According to this, since the uneven structure of the peripheral edge of the support hole comes into contact with the protrusion, it is possible to further strengthen the bond between the protrusion and the support hole. Therefore, it is possible to more reliably restrict movement of the power storage device with respect to the support member.

The other end of the power storage device in a predetermined direction may be fixed to the support member.

According to this, since the other end of the power storage device is fixed to the support member, when the power storage device is accommodated by sliding it from a predetermined direction with respect to the support member, the other end becomes the front side. The other end can be easily screwed to the support member. In addition, since it is possible to fix to the support member at the other end, which has fewer spatial constraints than the one end (back side), it is also possible to facilitate the fixing work.

According to the power storage equipment of the present invention, positioning work between the power storage device and the support member can be facilitated.

1 is a perspective view showing the appearance of a power storage facility according to Embodiment 1. FIG. 1 is a perspective view showing the appearance of a power storage facility according to Embodiment 1. FIG. 1 is a perspective view showing a schematic configuration of a stopper according to Embodiment 1. FIG. 1 is a perspective view showing the appearance of a power storage device according to Embodiment 1. FIG. FIG. 2 is an exploded perspective view showing each component when the power storage unit according to Embodiment 1 is disassembled. FIG. 2 is an exploded perspective view showing a schematic configuration of an exhaust section and a busbar frame according to the first embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of an exhaust section and an exterior body lid according to the first embodiment. FIG. 2 is a cross-sectional view showing a schematic configuration of an exhaust section and a power storage element according to Embodiment 1. FIG. FIG. 2 is a side view showing a schematic configuration of an exhaust port according to Embodiment 1. FIG. It is a side view which shows the gas discharged|emitted from the exhaust port part which is a comparative example. 2 is a plan view showing a schematic configuration of a protrusion according to Embodiment 1. FIG. FIG. 3 is a perspective view showing a schematic configuration of an exhaust port according to Embodiment 2. FIG. FIG. 7 is a cross-sectional view showing a schematic configuration of a wall according to Embodiment 3. FIG. 7 is a top view showing a schematic configuration of a wall according to Embodiment 3; It is a side view which shows the schematic structure of the protrusion part based on a modification.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a power storage facility according to an embodiment of the present invention (including variations thereof) will be described with reference to the drawings. Note that the embodiments described below are all inclusive 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 do not limit the present invention. Further, in each figure, dimensions etc. are not strictly illustrated.

In addition, in the following explanation and drawings, the direction in which a plurality of power storage devices are arranged on one shelf, the direction in which a pair of electrode terminals (positive electrode side and negative electrode side) in one power storage element are arranged, the direction in which the container of the power storage element is arranged, etc. The direction in which the short sides face each other or the direction in which the long sides of the exterior body of the power storage unit face each other is defined as the X-axis direction. The direction in which the front cover and the back cover face each other, the insertion direction in which the power storage device is inserted into the shelf board, the direction in which a plurality of power storage elements are lined up, the direction in which the long sides of the container of the power storage device face each other, the direction in which the power storage unit's exterior body is The direction in which the short sides face each other is defined as the Y-axis direction. The direction in which a plurality of shelf boards are lined up, the direction in which the exterior support of the power storage unit and the cover body of the power storage unit are lined up, the direction in which the power storage elements and the bus bar are lined up, the direction in which the container body and the lid of the power storage element are lined up, or the top and bottom. The direction is defined as the Z-axis direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect with each other (orthogonal in this embodiment). Note that depending on the mode of use, the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described as the vertical direction below.

Furthermore, in the following description, for example, the X-axis plus direction indicates the arrow direction of the X-axis, and the X-axis minus direction indicates the opposite direction to the X-axis plus direction. The same applies to the Y-axis direction and the Z-axis direction. Furthermore, hereinafter, the Y-axis direction may also be referred to as the first direction, the X-axis direction may also be referred to as the second direction, and the Z-axis direction may also be referred to as the third direction. Furthermore, expressions indicating relative directions or orientations, such as parallel and orthogonal, include cases where the directions or orientations are not strictly speaking. For example, when two directions are orthogonal, it does not only mean that the two directions are completely orthogonal, but also that they are substantially orthogonal, that is, there is a difference of only a few percent, for example. It also means to include.

(Embodiment 1)
[1 Description of the configuration of power storage equipment]
First, the configuration of power storage equipment 900 in this embodiment will be described. The power storage equipment 900 is a stationary storage battery board that stores power generated by wind power generation, solar power generation, etc., and stably supplies power to external equipment.

1 and 2 are perspective views showing the appearance of power storage equipment 900 according to the first embodiment. FIG. 1 is a perspective view of power storage equipment 900 viewed from the front side, and FIG. 2 is a perspective view of power storage equipment 900 viewed from the back side.

As shown in FIG. 1, power storage equipment 900 includes a metal rack 901 and a plurality of power storage devices 1. 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. In FIG. 1, one of the pair of front covers 920 is not shown. In FIG. 2, illustration of one of the pair of back covers 930 is omitted. Although FIGS. 1 and 2 illustrate a case in which a total of three power storage devices 1 are installed on the plurality of shelf boards 940, the number of power storage devices 1 installed is not limited to this.

The rack main body 910 is, for example, a rectangular box made of metal, and openings are provided on the front and back surfaces thereof. The opening on the front side of the rack body 910 is covered by a pair of front covers 920. The pair of front covers 920 are arranged side by side in the X-axis direction and are attached to the front part of the rack body 910 so as to open and close the opening on the front side of the rack body 910. The opening on the back side of the rack body 910 is covered by a pair of back covers 930. The pair of back covers 930 are arranged side by side in the X-axis direction and are attached to the back of the rack body 910 so as to open and close the opening on the back side of the rack body 910.

Although not shown, an electric circuit unit connected to a plurality of power storage devices 1 is provided inside the rack body 910. The electric circuit unit houses, for example, a wiring breaker (circuit breaker), a control circuit, and the like. The circuit breaker is placed on the main circuit through which the main current for charging and discharging each power storage device 1 flows, and the control circuit is connected to the board unit 20 (see FIG. 4) of each power storage device 1 by a signal line (not shown). It is connected.

Each front cover 920 and each rear cover 930 are provided with a plurality of slit groups 925 and 935 for ventilation. Specifically, the plurality of slit groups 925 are arranged in the Z-axis direction in the front cover 920. In one slit group 925, a plurality of slits that are long in the Z-axis direction are arranged along the X-axis direction. The plurality of slit groups 935 are arranged in the Z-axis direction in the back cover 930. In one slit group 935, a plurality of slits that are long in the Z-axis direction are arranged along the X-axis direction. The plurality of slit groups 925 and 935 ventilate the inside of the rack body 910 and prevent heat from building up inside the rack body 910.

[2 Shelf board]
Inside the rack body 910, a plurality of shelf boards 940 are arranged at predetermined intervals in the Z-axis direction. Shelf board 940 is an example of a support member that supports multiple power storage devices 1. Specifically, the shelf board 940 is a plate parallel to the XY plane, and a plurality of power storage devices 1 can be arranged and placed on one shelf board 940 in the X-axis direction. A slit group 925 faces the end of power storage device 1 placed on shelf board 940 on the Y-axis negative direction side. Similarly, a slit group 935 faces the end of power storage device 1 placed on shelf board 940 on the Y-axis positive direction side. Thereby, heat emitted from power storage device 1 can be smoothly discharged to the outside of rack 901 through slit groups 925 and 935.

A stopper 941 that protrudes upward is integrally provided at the end of the shelf board 940 in the Y-axis positive direction.

FIG. 3 is a perspective view showing a schematic configuration of the stopper 941 according to the first embodiment. As shown in FIG. 3, stopper 941 restricts movement of power storage device 1 in the Y-axis positive direction by contacting the end of power storage device 1 on the Y-axis positive direction side. Specifically, the stopper 941 is a plate parallel to the XZ plane and elongated in the X-axis direction. A plurality of support holes 942 are formed in the stopper 941 at predetermined intervals along the X-axis direction. The support hole 942 passes through the stopper 941 in the Y-axis direction. The support hole 942 is a rectangular hole that is elongated in the X-axis direction. One support hole 942 corresponds to one power storage device 1. A protrusion 180 provided at the end of the power storage device 1 on the Y-axis plus direction side is inserted into the support hole 942 from the Y-axis minus direction. A concavo-convex structure 943 that contacts the protrusion 180 is formed on the periphery of the support hole 942 in the stopper 941 .

Specifically, the uneven structure 943 is provided at the upper part of the support hole part 942 and at the edge of the central part. The uneven structure 943 is formed by alternately and repeatedly arranging a plurality of sets of recesses 944 and protrusions 945. Note that the uneven structure 943 only needs to have at least one concave portion 944 or one convex portion 945. The tip of the protrusion 945 is formed into an acute angle so as to fit into the protrusion 180. By bringing the tip of the convex portion 945 into contact with the protruding portion 180, movement of the power storage device 1 in the X-axis direction and the Y-axis direction can be restricted. Details of the protrusion 180 will be described later.

[3 Power storage device]
Next, the configuration of power storage device 1 in this embodiment will be explained. FIG. 4 is a perspective view showing the appearance of power storage device 1 according to the first embodiment. FIG. 5 is an exploded perspective view showing each component when power storage unit 10 according to the first embodiment is disassembled.

Power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and in this embodiment, has a substantially rectangular parallelepiped shape. For example, the power storage device 1 is used for power storage, power supply, or the like. Specifically, the power storage device 1 is used, for example, as a stationary battery or the like used in household or industrial power storage equipment. Moreover, the power storage device 1 is, for example, a battery for driving or starting an engine of a mobile object such as a car, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a railway vehicle for an electric railway. It can be used as, etc. Examples of the above-mentioned vehicle include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a gasoline vehicle. Examples of the above-mentioned railway vehicles for electric railways include electric trains, monorails, and linear motor cars.

As shown in FIGS. 4 and 5, power storage device 1 includes a power storage unit 10 and a board unit 20 attached to power storage unit 10. The power storage unit 10 is a battery module (battery assembly) having a substantially rectangular parallelepiped shape that is elongated in the Y-axis direction. Specifically, the power storage unit 10 includes a plurality of power storage elements 11, a busbar frame 12, an exhaust section 50, a plurality of busbars 13, an exterior main body 14, an exterior support 15, and an exterior body that accommodate these. It has an exterior body 18 consisting of a lid body 17. Further, a cable 30 is connected to the power storage unit 10. Note that the power storage unit 10 may include a restraining member (end plate, side plate, etc.) that restrains the plurality of power storage elements 11.

The power storage element 11 is a secondary battery (single battery) that can charge and discharge electricity, and more specifically, it is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. . The power storage elements 11 have a flat rectangular parallelepiped shape (prismatic shape), and in this embodiment, 16 power storage elements 11 are arranged side by side in the Y-axis direction. Note that the shape, arrangement position, number, etc. of the power storage elements 11 are not particularly limited. Further, the power 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 a capacitor. Furthermore, the power storage element 11 may be a primary battery that can use the stored electricity without having to be charged by the user, instead of being a secondary battery. Furthermore, the power storage element 11 may be a battery using a solid electrolyte. Further, the power storage element 11 may be a laminate type power storage element.

Specifically, the power storage element 11 includes a metal container 11a forming a main body, 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. That is, the positive terminal 11b and the negative terminal 11c are provided on the upper surface of the main body. A gas exhaust valve 111 (see FIG. 8) is provided on the lid of the container 11a between the positive terminal 11b and the negative terminal 11c, which discharges gas to release the pressure when the pressure inside the container 11a increases. The plurality of power storage elements 11 are arranged with their respective gas exhaust valves 111 facing in the same direction (Z-axis positive direction). Further, a flat spacer 11d having heat insulation properties is arranged between adjacent power storage elements 11. Note that the lid of the container 11a may be provided with a liquid injection part or the like for pouring the electrolyte. Further, inside the container 11a, an electrode body (also referred to as a power storage element or a power generation element), a current collector (a positive electrode current collector and a negative electrode current collector), etc. are arranged, and an electrolytic solution (non-aqueous electrolyte) etc. Although it is enclosed, detailed explanation will be omitted.

Here, the positive electrode terminal 11b and the negative electrode terminal 11c are arranged to protrude upward (in the Z-axis positive direction) from the lid of the container 11a. Then, the outermost positive terminals 11b and negative terminals 11c of the plurality of power storage elements 11 are connected to the cable 30, so that the power storage device 1 charges electricity from the outside and discharges electricity to the outside. be able to.

The cable 30 is an electric wire (also referred to as a power cable, a power cable, a power line, or a power line) through which a current (also referred to as a charge/discharge current or main current) for charging and discharging the power storage device 1 (power storage element 11) flows, and has a positive electrode. It has a positive power cable 31 on the side and a negative power cable 32 on the negative side. That is, the positive power cable 31 of the cable 30 is connected to the positive terminal 11b of the power storage element 11 at the end in the Y-axis positive direction among the plurality of power storage elements 11, and the positive electrode terminal 11b of the power storage element 11 at the end in the Y-axis negative direction A negative power supply cable 32 of the cable 30 is connected to the negative terminal 11c of the cable 30.

The busbar frame 12 is a flat rectangular member that can electrically insulate the busbar 13 from other members and regulate the position of the busbar 13. The busbar frame 12 is made of an insulating member such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), or the like. Specifically, the bus bar frame 12 is placed above the plurality of power storage elements 11 and positioned with respect to the plurality of power storage elements 11. Furthermore, a plurality of bus bars 13 are placed and positioned on the bus bar frame 12. Thereby, each bus bar 13 is positioned relative to the plurality of power storage elements 11 and joined to the positive electrode terminal 11b and negative electrode terminal 11c of the plurality of power storage elements 11. Details of the busbar frame 12 will be described later.

The exhaust section 50 is arranged on the bus bar frame 12 and forms an exhaust path 59 (see FIG. 8) for gas exhausted from the gas exhaust valve 111 of each power storage element 11. One end of the exhaust section 50 in the Y-axis plus direction is an exhaust port section 51 through which gas is exhausted, and protrudes from one end of the exterior body 18 in the Y-axis plus direction. Details of the exhaust section 50 will be described later.

Each bus bar 13 is a rectangular plate-like member that is arranged on the plurality of power storage elements 11 (on the busbar frame 12) and electrically connects the electrode terminals of the plurality of power storage elements 11. The bus bar 13 is made of metal such as aluminum, aluminum alloy, copper, copper alloy, or nickel material, for example. In this embodiment, the bus bar 13 connects the 16 power storage elements 11 in series by connecting the positive terminals 11b and negative terminals 11c of adjacent power storage elements 11. The plurality of busbars 13 include a first busbar group arranged along the Y-axis direction on the X-axis positive direction side (one side) and a first busbar group arranged along the Y-axis direction on the X-axis minus direction side (other side). It is divided into a second busbar group. Note that the mode of connection of the power storage elements 11 is not limited to the above, and series connection and parallel connection may be combined in any manner.

Further, a detection line 13a is connected to the bus bar 13 or the electrode terminal of the power storage element 11. The detection line 13a is a cable for detecting the state of each power storage element 11. The detection line 13a is an electric wire (also referred to as a communication cable, a control cable, a communication line, or a control line) for measuring the voltage of the power storage element 11, for temperature measurement, or for voltage balance between the power storage elements 11. Note that a thermistor (not shown) for measuring the temperature of the power storage element 11 is arranged on the bus bar 13 or the electrode terminal of the power storage element 11, but a description thereof will be omitted. Furthermore, a connector 13b is connected to the end of the detection line 13a in the Y-axis minus direction. The connector 13b is a connector connected to a board of a board unit 20, which will be described later. That is, the detection line 13a transmits information such as the voltage and temperature of the power storage element 11 to the board of the board unit 20 via the connector 13b. Further, the detection line 13a also has a function of discharging the power storage elements 11 having a high voltage by controlling the board and balancing the voltages between the power storage elements 11.

The exterior body 18 is a rectangular (box-shaped) housing (module case) that constitutes the exterior body of the power storage unit 10 . That is, the exterior body 18 is disposed outside the power storage element 11 and the like, fixes the power storage element 11 and the like in a predetermined position, and protects the power storage element 11 and the like from impact and the like. Here, the exterior body 18 includes an exterior body 14 that constitutes the main body of the exterior body 18, an exterior body support 15 that supports the exterior body body 14, and an exterior body that constitutes the lid body (outer lid) of the exterior body 18. It has a body lid body 17.

The exterior body 14 is a bottomed rectangular cylindrical housing with an opening formed therein. The exterior body 14 is formed of an insulating member such as PC, PP, PE, etc., for example. The exterior main body 14 accommodates a plurality of power storage elements 11, an exhaust section 50, a bus bar frame 12, and the like. A notch 141 through which the exhaust port 51 of the exhaust section 50 passes is formed at the upper center of the end of the exterior body 14 on the Y-axis plus direction side. The cutout portion 141 is a rectangular cutout that is open at the top.

The exterior support 15 and the exterior lid 17 are members that protect (reinforce) the exterior body 14. The exterior body support 15 and the exterior body lid 17 are formed of metal members such as stainless steel, aluminum, aluminum alloy, iron, and plated steel plate, for example. Note that the exterior support 15 and the exterior lid 17 may be made of the same material, or may be made of different materials.

The exterior body support 15 is an example of a second reinforcing member that supports the exterior body body 14 from below (Z-axis negative direction), and is fixed to the bottom part 15a, the board unit mounting part 16, and the connecting parts 15b and 15c. 15d. The bottom portion 15 a is a flat rectangular portion that constitutes the bottom portion of the power storage device 1 and extends in the Y-axis direction and parallel to the XY plane, and is disposed below the exterior body body 14 . When power storage device 1 is installed on shelf board 940, the lower surface of bottom portion 15a comes into contact with the upper surface of shelf board 940. That is, the lower surface of the bottom portion 15a is an installation surface 159 installed on the shelf board 940.

The board unit attachment part 16 is a flat, rectangular part that stands upright in the Z-axis positive direction from the end of the bottom part 15a in the Y-axis negative direction, and the board unit 20 is attached thereto. The connecting portion 15b is a portion that is disposed at the end of the board unit mounting portion 16 in the Z-axis positive direction, projects in the Y-axis negative direction, and is connected to the exterior body lid 17. The connecting portion 15c is a portion that stands upright in the Z-axis positive direction from the end of the bottom portion 15a in the Y-axis positive direction and projects in the Y-axis positive direction, and is connected to the exterior body lid 17. The fixing part 15d is a flat, rectangular part that stands upright in the Z-axis minus direction from the end of the bottom part 15a in the Y-axis minus direction, and is fixed to the end of the shelf board 940 in the Y-axis minus direction. This is the end of the The fixing part 15d is arranged at the center of the bottom part 15a in the X-axis direction. In this embodiment, screws are used to fix the fixing portion 15d and the shelf board 940, but any fixing method may be used as long as it can be fixed and released freely.

The exterior body lid 17 is an example of a first reinforcing member that covers the upper part of the plurality of power storage elements 11. Specifically, the exterior lid 17 is a member disposed to close the opening of the exterior body 14, and includes a top surface portion 17a and connection portions 17b and 17c. The top surface portion 17a is a flat, rectangular portion that constitutes the top surface portion of the power storage device 1 and extends in the Y-axis direction and parallel to the XY plane, and is disposed above the exterior body 14. The connecting portion 17b is a portion that is disposed at the end of the top surface portion 17a in the Y-axis negative direction, projects in the Y-axis negative direction, and is connected to the connecting portion 15b of the exterior body support 15. The connecting portion 17c is a portion that extends from the end of the top surface portion 17a in the Y-axis positive direction in the Z-axis negative direction and projects in the Y-axis positive direction, and is connected to the connecting portion 15c of the exterior body support 15. . In this way, the exterior body support 15 and the exterior body lid 17 sandwich the exterior body body 14 from above and below, and the connecting portions 15b and 15c and the connecting portions 17b and 17c are connected by screws or the like. This makes it a fixed configuration. As a result, each member (the bus bar frame 12, the plurality of power storage elements 11, and the exhaust section 50) housed in the exterior body 14 is vertically held between the exterior body support 15 and the exterior body lid 17. . Furthermore, the connecting portion 15c and the connecting portion 17c that are connected to each other constitute a protruding portion 180. Details of the protrusion 180 will be described later.

In addition, the connecting portion 17c of the exterior lid 17 has an opening 171 (see FIG. 7, etc.) in the center of the upper end (end on the positive side of the Z-axis) through which the exhaust port 51 of the exhaust portion 50 passes. is formed. The opening 171 has a shape in plan view that corresponds to the external shape of the exhaust section 50. In this embodiment, the opening 171 has a rectangular shape in plan view. The exhaust port 51 of the exhaust section 50 projects from the exterior body 18 by passing through the opening 171 and the notch 141 of the exterior body body 14 .

As shown in FIG. 4, the board unit 20 is a device that can monitor the state of the power storage element 11 included in the power storage unit 10 and control the power storage element 11. In the present embodiment, the substrate unit 20 is a flat rectangular member that is attached to the end of the power storage unit 10 in the longitudinal direction, that is, to the side surface of the power storage unit 10 in the negative direction of the Y-axis. Specifically, the board unit 20 is rotatably attached to a board unit attachment portion 16 (see FIG. 5) provided on the exterior support 15 of the exterior body 18 of the power storage unit 10.

[4 Busbar frame]
Next, details of the busbar frame 12 will be explained. FIG. 6 is an exploded perspective view showing a schematic configuration of the exhaust section 50 and the busbar frame 12 according to the first embodiment. FIG. 6 is a perspective view of the exhaust section 50 and the busbar frame 12 viewed from above.

As shown in FIG. 6, the busbar frame 12 is an example of a busbar holding member that is disposed on the plurality of power storage elements 11 and holds the plurality of busbars 13. Specifically, the busbar frame 12 includes a first holding part 71, a second holding part 72, and a connecting part 73. Here, among the plurality of detection lines 13a, the plurality of detection lines 13a held by the first holding part 71 are referred to as first detection lines. Further, among the plurality of detection lines 13a, the plurality of detection lines 13a held by the second holding part 72 are referred to as second detection lines.

The first holding portion 71 is a portion of the busbar frame 12 on the X-axis positive direction side (one side), and is a portion that holds the first busbar group and the positive power cable 31. In addition, the first holding part 71 is connected to an electrode terminal (positive electrode terminal 11b or negative electrode terminal 11c) in the X-axis positive direction of each power storage element 11 or a plurality of first detection terminals connected to the bus bar 13 included in the first bus bar group. It also holds the lines.

The first holding portion 71 is arranged in the positive direction of the X-axis with respect to the gas discharge valve 111 of each power storage element 11 . The first holding part 71 has a first outer wall part 711 that surrounds the outer periphery of the first holding part 71, and a first surrounding wall 712 that surrounds each bus bar 13 together with the first outer wall part 711.

A pair of first cutouts 711a and 711b are formed at the end of the first outer wall portion 711 in the Y-axis minus direction. The positive electrode power cable 31 and the plurality of first detection lines are arranged to pass through one of the pair of first cutouts 711a and 711b, the first cutout 711a. Moreover, the negative electrode power cable 32 is arranged so as to pass through the other first cutout 711b.

The first surrounding wall 712 is disposed within the first outer wall portion 711 on the positive side of the X-axis, and is elongated in the Y-axis direction. The end of the first surrounding wall 712 in the Y-axis positive direction is arranged between the power storage element 11 at the end in the Y-axis positive direction and the power storage element 11 adjacent thereto. The end of the first surrounding wall 712 in the negative Y-axis direction extends to the vicinity of the first cutout 711a of the first outer wall portion 711.

Inside the first surrounding wall 712, a plurality of first partition walls 713 arranged between each bus bar 13 and a plurality of first partitions 714 arranged between each power storage element 11 are provided. The first partition wall 713 has a flat plate shape parallel to the XZ plane, and its upper end surface is flush with the upper end surface of the first outer wall portion 711. The first partition portion 714 is a portion that is elongated in the X-axis direction and is lower in height than the first partition wall 713. Each bus bar 13 is arranged so as to straddle the corresponding first partition portion 714.

In the first outer wall portion 711, a region further in the negative X-axis direction than the first surrounding wall 712 is a first cable path portion 715 that is penetrated along the Y-axis direction. The first cable path section 715 is arranged between the gas exhaust valve 111 of each power storage element 11 and each bus bar 13 included in the first bus bar group. In this way, the first cable path portion 715 is arranged inside the first busbar group in the X-axis direction within the busbar frame 12.

In the first cable path section 715, the positive power supply cable 31 and a plurality of first detection lines are arranged. The first cable route section 715 forms a route for the positive power supply cable 31 and the plurality of first detection lines. By being arranged in the first cable path section 715, the plurality of first detection lines and the positive power cable 31 avoid being between the first holding section 71 and the second holding section 72, that is, on the connecting section 73. It is arranged as follows.

The second holding portion 72 is a portion of the bus bar frame 12 on the X-axis negative direction side (the other side). The second holding part 72 is connected to the second busbar group, the electrode terminal (positive terminal 11b or negative electrode terminal 11c) in the X-axis negative direction of each power storage element 11, or the busbar 13 included in the second busbar group. and a plurality of second detection lines.

The second holding portion 72 is arranged in the negative direction of the X-axis relative to the gas exhaust valve 111 of each power storage element 11 . The second holding part 72 has a second outer wall part 721 that surrounds the outer periphery of the second holding part 72, and a second surrounding wall 722 that surrounds each bus bar 13 together with the second outer wall part 721.

A second notch 721a is formed at the end of the second outer wall portion 721 in the Y-axis minus direction. A plurality of second detection lines are arranged to pass through the second notch 721a.

The second surrounding wall 722 is disposed within the second outer wall portion 721 on the negative side of the X-axis, and is elongated in the Y-axis direction. The end of the second surrounding wall 722 in the Y-axis plus direction is continuous with the end of the second outer wall 721 in the Y-axis plus direction. Further, the end of the second surrounding wall 722 in the Y-axis minus direction extends to the vicinity of the second notch 721a of the second outer wall portion 721.

In the region of the second surrounding wall 722 on the X-axis minus direction side, a plurality of second partition walls 723 arranged between each bus bar 13 and a plurality of second partitions 724 arranged between each power storage element 11 are provided. and is provided. The second partition wall 723 has a flat plate shape parallel to the XZ plane, and its upper end surface is flush with the upper end surface of the second outer wall portion 721. The second partition portion 724 is a portion that is elongated in the X-axis direction, and is lower in height than the second partition wall 723. Each bus bar 13 is arranged so as to straddle the corresponding second partition portion 724.

In the second outer wall portion 721, a region on the X-axis plus direction side of the second surrounding wall 722 is a second cable path portion 725 that is penetrated along the Y-axis direction. The second cable path section 725 is arranged between the gas exhaust valve 111 of each power storage element 11 and each bus bar 13 included in the second bus bar group. In this way, the second cable path section 725 is arranged inward in the X-axis direction within the busbar frame 12 from the second busbar group.

A plurality of second detection lines are arranged in the second cable path section 725. The plurality of second detection lines are arranged in the second cable path section 725 so as to avoid between the first holding section 71 and the second holding section 72, that is, on the connecting section 73. .

As shown in FIG. 6, the connecting part 73 is a part that connects the first holding part 71 and the second holding part 72. Specifically, the connecting portion 73 includes a plurality of beam portions 731 that are elongated in the X-axis direction and have one end connected to the first holding portion 71 and the other end connected to the second holding portion 72. ing. The plurality of beam portions 731 are arranged at predetermined intervals in the Y-axis direction. The exhaust section 50 is arranged on the plurality of beam sections 731. Among the plurality of beam portions 731, the beam portion 731 at the end in the Y-axis negative direction is arranged outside the power storage element 11 at the end in the Y-axis negative direction. Furthermore, the beam portion 731 at the end in the Y-axis positive direction is arranged outside the power storage element 11 at the end in the Y-axis positive direction. Beam portions 731 other than these are arranged between a pair of adjacent power storage elements 11. In this way, the plurality of beam parts 731 are arranged at positions retracted from the gas exhaust valve 111 of each power storage element 11. In other words, the gas exhaust valve 111 of each power storage element 11 is exposed from the plurality of beam portions 731 when viewed from above.

[5 Exhaust part]
FIG. 7 is an exploded perspective view showing a schematic configuration of the exhaust section 50 and the exterior body lid 17 according to the first embodiment. Specifically, FIG. 7 is a perspective view of the exhaust section 50 and the exterior body lid 17 viewed from below. FIG. 8 is a cross-sectional view showing a schematic configuration of exhaust section 50 and power storage element 11 according to the first embodiment.

As shown in FIGS. 6 to 8, the exhaust section 50 includes an exhaust member 60 and a lid member 65. The exhaust member 60 is disposed directly above the gas exhaust valve 111 of each power storage element 11 while being supported by the bus bar frame 12 as a whole. The exhaust member 60 is formed in a U-shape with an open top when viewed in the Y-axis direction, and is a resin-made member that is elongated in the Y-axis direction. The length of the exhaust member 60 in the Y-axis direction corresponds to the entire length of the exterior body body 14 in the Y-axis direction. Therefore, the entire exhaust member 60 can be housed within the exterior body main body 14.

At the bottom of the exhaust member 60, a pair of walls 601 are provided on the upper surface of both ends in the X-axis direction. Each wall portion 601 is formed substantially parallel to the YZ plane. A groove 602 extending along the Y-axis direction is formed near each wall portion 601 on the upper surface of the bottom portion. Each wall portion 652 of the lid member 65 is arranged within each groove 602 .

Furthermore, a plurality of holes 61 are formed in the center of the bottom of the exhaust member 60 in the X-axis direction to expose the gas exhaust valves 111 of each power storage element 11 . A plurality of contact portions 62 are provided on the outer bottom surface of the exhaust member 60 and protrude so as to continuously surround the entire circumference of each hole portion 61 . A flat elastic body 621 made of, for example, rubber is laminated on the lower surface of each contact portion 62 . Each contact portion 62 has a substantially rectangular outer shape in plan view. The contact portions 62 are arranged at predetermined intervals in the Y-axis direction, and groove portions 63 extending in the X-axis direction are formed between the contact portions 62 . By forming this groove portion 63, each contact portion 62 can be divided, and a convex contact portion 62 can be easily formed.

As shown in FIG. 8, the contact portion 62 is a convex portion that protrudes toward the power storage element 11, and its tip surface (lower end surface) is in contact with the lid of the container 11a of the power storage element 11. Specifically, the contact portion 62 is in close contact with the lid portion of the container 11a with the elastic body 621 being compressed. The contact portion 62 surrounds the entire circumference of the gas exhaust valve 111 provided in the lid, and an elastic body 621 seals the boundary between the gas exhaust valve 111 and the hole 61 . The hole 61 is formed to be longer than the gas exhaust valve 111 in the direction in which the plurality of electrode terminals (the positive electrode terminal 11b and the negative electrode terminal 11c) of the power storage element 11 are arranged (X-axis direction). Note that the hole 61 may have the same shape as the gas exhaust valve 111.

Here, the size of the power storage element 11 in the Y-axis direction is smaller than the size in the X-axis direction. In other words, it is difficult to enlarge the hole 61 in the Y-axis direction. On the other hand, in the X-axis direction, the hole 61 is made longer than the gas exhaust valve 111 because it is easy to make the hole 61 larger. Thereby, when the gas exhaust valve 111 is opened, it is possible to prevent the opening from being blocked by the hole 61, and smooth gas discharge is possible. Note that if the hole portion 61 as a whole has a larger shape than the gas exhaust valve 111, smoother gas exhaustion is possible.

Further, the peripheral edge of the hole 61 on the Z-axis plus direction side is an annular portion 64 that protrudes toward the lid member 65 over the entire circumference. The annular portion 64 is continuous over the entire circumference. The annular portion 64 not only reinforces the periphery of the hole 61 but also prevents the entire periphery of the hole 61 from melting even if exposed to high temperature gas.

The exhaust member 60 may be made of a resin having higher heat resistance than the busbar frame 12. For example, if the busbar frame 12 is made of PP, the exhaust member 60 may be made of polyphenylene sulfide (PPS), which has higher heat resistance than PP. Here, when the busbar frame and the exhaust member are integrally molded from a single resin, it is necessary to mold them all from a resin with high heat resistance. Since only the exhaust member 60 of the body needs to be made of a resin with high heat resistance, the amount of the resin used can be suppressed.

As shown in FIGS. 6 to 8, the lid member 65 is disposed above the exhaust member 60 and closes the open portion of the exhaust member 60. Specifically, the lid member 65 is made of metal and has higher heat dissipation than the exhaust member 60. The lid member 65 is formed in a U-shape with an open bottom when viewed in the Y-axis direction, and is a member that is elongated in the Y-axis direction.

The lid member 65 includes a top plate portion 651 and a pair of wall portions 652. The top plate section 651 is a long rectangular plate section parallel to the XY plane. The pair of wall portions 652 are provided on the lower surface of both ends of the top plate portion 651 in the X-axis direction. Each wall portion 652 is formed parallel to the YZ plane. The lower end of each wall portion 652 is in contact with the bottom surface of the groove 602 of the exhaust member 60. In this way, since the lower end of each wall portion 652 is accommodated in the groove 602 and is in contact with the bottom surface of the groove 602, compared to the case where the lower end of each wall portion 652 is in contact with a flat surface, The airtightness between each wall portion 652 and the exhaust member 60 can be improved. In this state, the top plate portion 651 of the lid member 65 is located above the pair of wall portions 601 of the exhaust member 60. Therefore, the top plate portion 651 of the lid member 65 is pressed downward by the top surface portion 17a of the exterior body lid body 17. This pressing force presses the pair of wall portions 652 of the lid member 65 against the bottom surface of the groove 602, so that higher sealing performance can be achieved. Further, when gas is discharged from the gas discharge valve 111 of the power storage element 11, the lid member 65 receives the gas, so that the lid member 65 may float. Since the lid member 65 receives a downward pressing force from the exterior body lid 17, lifting of the lid member 65 due to gas discharge can be suppressed.

Further, since a downward pressing force is applied to the exhaust member 60 from the pair of wall portions 652 of the lid member 65, the exhaust member 60 presses the plurality of power storage elements 11 downward. Thereby, the elastic body 621 of the exhaust member 60 can be reliably compressed, and higher adhesion can be exhibited. Further, by this pressing force, it is also possible to suppress vertical displacement of the plurality of power storage elements 11.

The length of the lid member 65 in the Y-axis direction is longer than the total length of the exhaust member 60 in the Y-axis direction. Therefore, one end of the lid member 65 on the Y-axis plus direction side can be made to protrude from the exhaust member 60.

One end of the lid member 65 in the positive direction of the Y-axis projects from the exhaust member 60 and is open at the bottom and at the tip. On the other hand, the other end of the lid member 65 is closed to prevent gas from being discharged. The lid member 65 is housed in the exhaust member 60 and forms a gas exhaust path 59 together with the exhaust member 60 . Gas is exhausted from the open portion at one end of the lid member 65 mentioned above. That is, one end portion of the lid member 65 is the exhaust port portion 51 through which gas is exhausted. As a result, the exhaust port portion 51 has a U-shape when viewed in the gas traveling direction (as viewed in the Y-axis direction). Specifically, the exhaust port portion 51 has a U-shape with the open portion facing downward.

FIG. 9 is a side view showing a schematic configuration of the exhaust port section 51 according to the first embodiment. In FIG. 9, two power storage devices 1 arranged vertically are shown in a side view, and a shelf board 940 and a back cover 930 are shown in a cross-sectional view.

The exhaust port portion 51 projects outward from the ends of the bus bar frame 12 and the exterior body 18 in the Y-axis positive direction. Further, the exhaust port portion 51 projects outward from the end of the shelf board 940 in the Y-axis positive direction.

The gas discharged from the gas exhaust valve 111 of each power storage element 11 enters the exhaust path 59 formed by the exhaust member 60 and the lid member 65 through the hole 61 of the exhaust member 60 . Thereafter, the gas passes through the exhaust path 59 and is discharged to the outside of the power storage unit 10 from the exhaust port 51 located outside the exterior body 18 . As described above, since the exhaust port section 51 is open at its tip and bottom, the gas G1 is released from these open sections.

Here, FIG. 10 is a side view showing the gas G2 discharged from the exhaust port portion 51e, which is a comparative example. FIG. 10 is a diagram corresponding to FIG. 9. The exhaust port portion 51e of the comparative example differs from the exhaust port portion 51 according to the present embodiment in that the lower portion is closed and only the tip portion is open. Therefore, the gas G2 is vigorously ejected from the tip of the exhaust port 51e. Due to this force, gas G2 hits other devices (such as other power storage equipment, etc.) in the vicinity of power storage equipment 900 through slit group 935 of back cover 930. This may cause the gas G2 to have an adverse effect on other devices.

On the other hand, as shown in FIG. 9, in the exhaust port section 51 according to the present embodiment, the gas G1 is discharged from the open tip and lower part, so that the force at the time of discharge is dispersed. This makes it difficult for the gas G1 to reach other devices, making it possible to suppress adverse effects on other devices.

[6 Projection]
Next, details of the protrusion 180 will be explained. FIG. 11 is a plan view showing a schematic configuration of protrusion 180 according to the first embodiment. As shown in FIGS. 3, 9, and 11, the protruding portion 180 is an example of an eaves portion that protrudes in the Y-axis positive direction from one end surface 99 of the power storage device 1 in the Y-axis positive direction. As described above, the protruding portion 180 is a portion formed by connecting the connecting portion 15c of the exterior body support 15 and the connecting portion 17c of the exterior body lid 17. The connecting portion 15c and the connecting portion 17c are fastened together by screws 181 in a vertically stacked state. Specifically, the connecting portion 15c and the connecting portion 17c each have a rectangular plate-shaped portion that is parallel to the XY plane and elongated in the X-axis direction. An elastic body 151 made of, for example, rubber is attached to the upper surface of the connecting portion 17c. The elastic body 151 is arranged at a position corresponding to the uneven structure 943 of the shelf board 940. The elastic body 151 is a triangular prism-shaped member that is elongated in the X-axis direction. The elastic body 151 is arranged so as to taper on the connecting portion 17c. That is, the elastic body 151 has an inclined surface 151a that approaches the upper surface of the connecting portion 17c as it goes in the positive direction of the Y-axis. As a result, the protruding portion 180 has a tapered shape that becomes thinner in the thickness direction (Z-axis direction) as it goes toward the tip. For example, when the power storage device 1 is set on the shelf board 940, the power storage device 1 is slid on the shelf board 940 from the Y-axis negative direction with respect to the support hole 942, so that the protrusion 180 is inserted into the support hole 942. If the protrusion 180 has a tapered shape, it can be smoothly inserted into the support hole 942, thereby improving operability during insertion.

Further, the elastic body 151 is provided in a longer range than the uneven structure 943 in the X-axis direction. As a result, when the protrusion 180 is inserted into the support hole 942 of the shelf board 940, the entire uneven structure 943 meshes with the elastic body 151.

Here, the electrolyte may be discharged from the gas discharge valve 111 of the power storage element 11, or the discharged gas may be cooled in the exhaust path 59 and returned to the electrolyte. That is, the electrolytic solution L may fall from the open portion at the bottom of the exhaust port portion 51, as shown in FIG. Since the protrusion 180 is disposed between the installation surface 159 of the power storage device 1 and the exhaust port 51, the protrusion 180 can receive the electrolyte L. Specifically, since the elastic body 151 provided on the protrusion 180 is disposed below the exhaust port 51, the inclined surface 151a of the elastic body 151 receives the electrolyte L. The electrolytic solution L is guided in the positive direction of the Y-axis by the inclined surface 151a of the elastic body 151. As a result, the heated electrolytic solution L separates from one end surface 99 of power storage device 1 .

Further, depending on the situation, it is also assumed that the electrolyte L flows on the protrusion 180 in the negative direction of the Y-axis. However, since the protruding part 180 is formed by the connecting part 17c of the exterior body lid 17 that covers the upper part of the power storage element 11, electrolysis occurs on the protruding part 180 toward the Y-axis negative direction side (the power storage element 11 side). Even if the liquid L flows, the exterior body lid 17 itself acts as a wall, and further progress can be suppressed. Even if the electrolytic solution L comes into contact with the exterior lid 17, the electrolytic solution L does not advance to the members (power storage element 11, exterior body 14, etc.) located inside the exterior lid 17.

In particular, in this embodiment, since the exhaust port portion 51 projects further outward than the protruding portion 180, the gas G1 and electrolyte L that have passed through the exhaust path 59 are discharged at a position away from the protruding portion 180. . Specifically, the electrolyte L may gradually move downward while moving in the positive direction of the Y-axis on the inner surface of the exhaust port 51 under the force of the gas G1. In other words, the heated electrolyte L is less likely to be discharged near the power storage device 1 and less likely to fall onto the protrusion 180. Therefore, combustion of the power storage device 1 caused by the electrolyte L can be suppressed, and safety can be further improved.

As shown in FIG. 11, when one end surface 99 of the power storage device 1 is viewed from above, when the center P of the one end surface 99 is taken as a reference, the protrusion 180 is disposed below the center P, and the exhaust port The portion 51 is arranged above the center P. In this way, since the exhaust port 51 is arranged at the upper part of the one end surface 99 and the protrusion 180 is arranged at the lower part, the fall path of the electrolyte L from the exhaust port 51 to the protrusion 180 is fixed. can be made longer. Therefore, the time during which the electrolytic solution L is exposed to air can be increased, and the electrolytic solution L can be cooled as much as possible. Thereby, the temperature when the electrolytic solution L contacts the protrusion 180 can be lowered, and thermal deformation of the protrusion 180 can be suppressed.

[7 Explanation of effects]
As described above, according to the power storage device 1 according to the present embodiment, the power storage equipment 900 includes the power storage device 1 including the plurality of power storage elements 11 and the shelf board 940 (support member) that supports the power storage device 1. The power storage device 1 includes a protrusion 180 that protrudes in a predetermined direction from one end surface 99 of the power storage device 1 in a predetermined direction, and the shelf board 940 is a support into which the protrusion 180 is inserted from the predetermined direction. A hole 942 is provided.

According to this, since the protruding portion 180 provided on one end surface 99 of power storage device 1 protrudes from one end surface 99, when storing power storage device 1 by sliding it from a predetermined direction with respect to shelf board 940, The protrusion 180 can be easily inserted into the support hole 942. At the time of insertion, it is difficult to position the protrusion 180 at one end, which is the rear side, due to spatial restrictions.However, as described above, if the protrusion 180 can be inserted into the support hole 942 by simply sliding the protrusion 180, the positioning work can be made easier. Can be done.

Further, after insertion, since protrusion 180 is in contact with support hole 942, movement of power storage device 1 can be restricted. In this way, movement of power storage device 1 with respect to shelf board 940 can be easily restricted.

Further, since the protrusion 180 can be used as a handle, a member dedicated to the handle is not required.

Further, the power storage device 1 has an exterior body 18 (housing) that covers the plurality of power storage elements 11 , and the exterior body 18 includes a protrusion 180 .

According to this, the protrusion 180 provided on the exterior body 18 can be inserted into the support hole 942. Therefore, positioning can be performed using the protrusion 180 that has a function other than positioning, which was originally provided in the exterior body 18. In other words, one protrusion 180 can serve multiple functions, and the number of parts, size, and weight can be reduced compared to the case where dedicated members are provided for each. Thereby, handling of power storage device 1 itself during positioning work can be facilitated.

Further, the protrusion 180 has a tapered shape that becomes thinner toward the tip.

According to this, since the protrusion 180 has a tapered shape, the protrusion 180 can be easily inserted into the support hole 942. This improves the operability during insertion, so that the protrusion 180 can be inserted into the support hole 942 more reliably.

Furthermore, the protrusion 180 includes an elastic body 151 that is pressed by the support hole 942 when the protrusion 180 is inserted into the support hole 942 .

According to this, since the protrusion 180 is provided with the elastic body 151 that is pressed by the support hole 942, when the protrusion 180 is inserted into the support hole 942, the elastic body 151 is elastically deformed. It will mesh with the support hole 942. Thereby, positioning with respect to the support hole 942 can be strengthened. Therefore, it is possible to more reliably restrict movement of power storage device 1 with respect to shelf board 940.

Furthermore, an uneven structure 943 that contacts the protrusion 180 is provided on the periphery of the support hole 942 .

According to this, the uneven structure 943 on the peripheral edge of the support hole 942 comes into contact with the protrusion 180, so that the connection between the protrusion 180 and the support hole 942 can be made stronger. Therefore, it is possible to more reliably restrict movement of power storage device 1 with respect to shelf board 940.

Further, in the power storage device 1, the fixing portion 15d (the end on the other end side in the predetermined direction) is fixed to the shelf board 940 material.

According to this, since the fixing portion 15d, which is the end on the other end side, of the power storage device is fixed to the shelf board 940, the power storage device 1 is slid from a predetermined direction with respect to the shelf board 940. The fixing portion 15d, which is on the near side when stored, can be easily screwed to the shelf board 940. Further, since it can be fixed to the shelf board 940 using the fixing portion 15d on the other end side, which has fewer spatial restrictions than the one end side (back side), it is also possible to facilitate the fixing work.

Further, according to the power storage device 1 according to the present embodiment, the plurality of power storage elements 11 are arranged along a predetermined direction and each has a gas exhaust valve 111, and each of the plurality of power storage elements 11 has a gas exhaust valve 111. A power storage device including an exhaust section 50 disposed above and forming an exhaust path 59 for gas discharged from the gas discharge valve 111, and an exterior lid 17 (first reinforcing member) that covers the top of the plurality of power storage elements 11. In the device 1, one end surface 99 of the power storage device 1 in a predetermined direction includes an exhaust port portion 51 of the exhaust path 59, and a protrusion portion 180 (eaves portion) protruding from the one end surface 99 in a predetermined direction. The protruding portion 180 is formed by the connecting portion 17c (one end portion) of the exterior body lid 17, and is disposed between the exhaust port portion 51 and the installation surface 159 of the power storage device 1. ing.

According to this, since the protrusion 180 is disposed between the exhaust port 51 and the installation surface 159, the protrusion 180 can receive the electrolyte L discharged from the exhaust port 51. The electrolytic solution L is guided in a predetermined direction by the protrusion 180 so that it leaves the one end surface 99 of the power storage device 1 . Therefore, it is possible to make it difficult for the heated electrolytic solution L to touch one end surface 99 of the power storage device 1.

Furthermore, since the protrusion 180 is formed by the connection part 17c of the exterior cover 17 that covers the upper part of the plurality of power storage elements 11, it is assumed that the electrolyte L flows toward the power storage element 11 on the protrusion 180. However, the exterior body lid 17 itself becomes a wall, and further progress can be suppressed. Even if the electrolytic solution comes into contact with one end surface 99 of the power storage device 1, the electrolytic solution L does not advance to the members (power storage element 11, main body 14, etc.) located inward of the exterior lid 17. For these reasons, ignition of power storage device 1 caused by electrolyte L can be suppressed, and safety can be improved.

Further, the exterior body 18 has a protruding portion 180 (eaves portion) that protrudes from one end surface 99 where the exhaust port portion 51 is disposed and is disposed between the exhaust port portion 51 and the shelf board 940. The portion 51 protrudes further outward than the protruding portion 180.

Further, the exhaust port portion 51 is disposed above the center P of the one end surface 99 of the power storage device 1 when viewed from above, and the protrusion portion 180 is arranged above the center P of the one end surface 99 of the power storage device 1. It is arranged below the center P of the one end surface 99 when viewed from above.

According to this, since the exhaust port part is arranged at the upper part of the one end surface 99 and the protrusion part 180 is arranged at the lower part, the falling path of the electrolyte solution L from the exhaust port part 51 to the protrusion part 180 is arranged. can be made longer. Therefore, the time during which the electrolytic solution L is exposed to air can be increased, and the electrolytic solution L can be cooled as much as possible. Thereby, the temperature when the electrolytic solution L contacts the protrusion 180 can be lowered, and thermal deformation and combustion of the protrusion 180 can be suppressed. Therefore, safety can be further improved.

In addition, the power storage device 1 includes an exterior body support 15 (second reinforcing member) that is disposed below the plurality of power storage elements 11 and reinforces the plurality of power storage elements 11 together with the exterior body lid 17, A connecting portion (connecting portions 15c and 17c) connecting one end of the exterior body lid 17 and the exterior body support 15 is a protruding portion 180, and the exhaust portion 50 is pressed by the exterior body lid 17. .

According to this, since the exhaust part 50 is pressed by the exterior body lid 17, even if the exhaust part 50 tries to float due to gas being discharged from the gas discharge valve 111, the exterior body lid 17 This makes it possible to suppress floating of the exhaust section 50. In this way, the exterior lid body 17 has both the function of an eaves part and the function of suppressing floating of the exhaust part 50, so the number of parts can be reduced compared to the case where dedicated members are provided for each. can. If the number of parts can be reduced, the number of combustible parts will also be reduced, increasing safety.

Further, the exhaust section 50 presses the plurality of power storage elements 11 by the pressing force received from the exterior body lid 17.

According to this, since the plurality of power storage elements 11 are pressed by the pressing force that the exhaust part 50 receives from the exterior body lid 17, it is possible to suppress vertical positional displacement of the plurality of power storage elements 11. In this way, the exterior lid body 17 has the function of an eaves part, the function of suppressing the floating of the exhaust part 50, and the function of suppressing the displacement of the power storage element 11, so that dedicated members are used for each. The number of parts can also be reduced compared to the case where such a structure is provided. If the number of parts can be reduced, the number of combustible parts will also be reduced, improving safety.

Further, according to the power storage device 1 according to the present embodiment, the plurality of power storage elements 11 each having a gas discharge valve 111 and arranged in a posture such that the gas discharge valves 111 face in the same direction, and the plurality of power storage elements Exhaust part 50 which is arranged on each gas exhaust valve 111 of 11 and forms an exhaust path 59 of gas G1 discharged from the gas exhaust valve 111, and exterior body 18 that accommodates a plurality of power storage elements 11 and exhaust part 50. (casing), a part of the exhaust part 50 is an exhaust port part 51 that protrudes from the exterior body 18 and forms an exit part of the exhaust path 59, and the exhaust port part 51 is It is U-shaped and protrudes outward beyond the shelf board 940 (supporting member) that supports the power storage element 11 from below.

According to this, the exhaust port portion 51 is U-shaped when viewed in the direction of movement of the gas G1. That is, since it has a partially open shape, the gas G1 is also discharged from the open part. Therefore, since the gas G1 can be diffused and discharged to the outside, it is possible to prevent the gas G1 from being intensively ejected to other devices adjacent to the power storage device 1. Therefore, it is possible to suppress an adverse effect on other devices during gas discharge, and it is possible to suppress combustion of the other devices. Thereby, safety at the time of gas discharge can be improved.

Further, since deposits caused by the gas G1 are less likely to accumulate inside the exhaust port portion 51, clogging of the exhaust path 59 can be suppressed, and smooth discharge of the gas G1 can be maintained. Therefore, it is possible to provide highly safe power storage device 1.

Furthermore, since the exhaust port 51 projects further outward than the shelf board 940, the gas G1 and the electrolyte L can be guided by the exhaust port 51 to a position away from the shelf board 940. In other words, the heated electrolytic solution L is less likely to be discharged near the power storage device 1 and less likely to fall onto the shelf board 940. Therefore, combustion in the power storage device 1 caused by the electrolyte L can be suppressed.

Further, the U-shaped opening in the exhaust port 51 faces downward.

According to this, since the U-shaped opening in the exhaust port 51 faces downward, the discharged electrolyte L can easily fall below the exhaust port 51. Therefore, deposits coming out of the power storage element 11 are less likely to accumulate inside the exhaust port portion 51, so that clogging of the exhaust path 59 can be suppressed more reliably. Therefore, safety can be further improved.

According to this, since the exhaust port portion 51 projects further outward than the protruding portion 180, the protruding portion 180 can receive the electrolytic solution L dripping from the open portion of the exhaust port portion 51. The electrolytic solution L is guided further outward by the protruding portion 180 and is separated from the one end surface 99 of the exterior body 18 . That is, it is possible to make it difficult for the heated electrolytic solution to touch one end surface 99 of the exterior body 18, and it is possible to suppress the ignition of the exterior body 18 caused by the electrolytic solution L. Therefore, safety can be further improved.

(Embodiment 2)
In the first embodiment, the exhaust port 51 has a U-shape with the opening facing downward when viewed in the gas traveling direction. In Embodiment 2, a case will be exemplified in which the exhaust port part is U-shaped with the open part facing upward when viewed in the gas traveling direction. In the following description, parts equivalent to those in the first embodiment may be given the same reference numerals and the description thereof may be omitted.

FIG. 12 is a perspective view showing a schematic configuration of an exhaust port portion 51a according to the second embodiment. Specifically, FIG. 12 is a diagram corresponding to FIG. 3. As shown in FIG. 12, one end of the exhaust member 60a protrudes from an opening 171 of the exterior lid 17, and one end of the lid member 65a is housed within the exterior lid 17. One end of the exhaust member 60a protruding from the opening 171 is the exhaust port 51a. In this example, the exhaust rear part 51a is fixed to the exterior body lid 17 by welding, screwing, or the like. Therefore, the exhaust port portion 51a has a U-shape with an open top when viewed in the Y-axis direction. Note that the exhaust port portion 51a may have a structure that is open at the top, and is not limited to its material, structure, or manufacturing method. For example, separate U-shaped members may be connected by welding, screwing, or the like.

According to this, the exhaust port portion 51a protrudes outward from the shelf board 940, and the U-shaped open portion of the exhaust port portion 51a faces upward, so that the exhaust port portion 51a extends to a position away from the shelf board 940. Gas and electrolyte can be guided through the portion 51a. Since the gas easily rises, immediately after passing through the opening 171, the gas is diffused and exhausted at the opening above the exhaust port 51a. Thereby, it is possible to make it more difficult to apply gas to other devices adjacent to power storage equipment 900.

Furthermore, if the gas and electrolyte can be guided through the exhaust port 51a to a position away from the shelf board 940, the heated electrolyte L will be difficult to be discharged near the power storage device 1, and the electrolyte L will be difficult to discharge onto the shelf board 940. Less likely to fall. Therefore, combustion of the power storage device 1 caused by the electrolyte L can be suppressed, and safety can be further improved.

Note that the U-shaped opening in the exhaust port may be oriented in a direction other than upward or downward. For example, other orientations of the U-shaped opening in the exhaust port include an X-axis positive direction, an X-axis negative direction, and the like.

(Embodiment 3)
In the first embodiment described above, the case where one end surface 99 of the power storage device 1 is exposed within the rack 901 is illustrated. In this third embodiment, a power storage facility 900B in which a wall 980 covering one end surface 99 of power storage device 1 is provided in rack 901 will be described.

FIG. 13 is a sectional view showing a schematic configuration of a wall 980 according to the third embodiment. Specifically, FIG. 13 is a diagram corresponding to FIG. 9. In FIG. 13, two power storage devices 1 arranged vertically are shown in a side view, and a shelf board 940, a back cover 930, and a wall 980 are shown in a cross-sectional view. FIG. 14 is a top view showing a schematic configuration of a wall 980 according to the third embodiment.

As shown in FIG. 13, wall 980 is a fire-resistant plate material placed on stopper 941 of shelf board 940, and covers one end surface 99 of power storage device 1 from the Y-axis positive direction side. A through hole 981 is formed in the wall 980, through which the exhaust port 51 of each power storage element 11 passes. The wall 980 also covers the spaces between the shelf boards 940 that are vertically adjacent to each other. As shown in FIG. 14, wall 980 covers space S between adjacent power storage devices 1 in the X-axis direction from the Y-axis positive direction side. Thereby, wall 980 partitions, in rack 901b, first space S1 in which a plurality of power storage devices 1 are accommodated and second space S2 from which gas G1 is discharged. Thereby, the gas G1 discharged into the second space S2 can be blocked by the wall 980, and it is possible to suppress the gas G1 from entering the first space S1. Therefore, it is possible to suppress the plurality of power storage devices 1 housed in the rack 901b from being exposed to the gas G1, and it is possible to improve safety after the gas is discharged.

Furthermore, since the exhaust port 51 protrudes from the wall 980, the gas G1 exhausted from the exhaust port 51 is discharged to the outside of the wall 980. Here, since the wall 980 covers the space S from the exhaust port 51 side, the wall 980 blocks the flammable gas discharged from the exhaust port 51 from reaching the adjacent power storage device 1 from the space S. be able to. Therefore, it is possible to suppress the spread of fire to the adjacent power storage device 1, and it is possible to improve the safety after gas discharge.

Further, since a through hole 981 that exposes the exhaust port 51 is formed in a wall 980 that covers one end surface 99 of the power storage device 1, gas G1 exhausted by the power storage device 1 itself is exhausted from the through hole 981. . If power storage device 1 is exposed to this gas G1, there is a high possibility that power storage device 1 will burn, but since one end surface 99 of power storage device 1 is covered by wall 980, wall 980 blocks gas G1. That is, it is possible to suppress burning of the power storage device 1 itself that has discharged the gas G1. Thereby, safety after gas discharge can be further improved.

Furthermore, since the wall 980 is provided on the rack 901b, there is no need to provide a wall to the power storage device 1, and it is possible to suppress the increase in the size of the power storage device 1. Since the rack 901b has smaller space and weight restrictions than the power storage device 1, it is possible to install a highly heat-resistant wall 980. Therefore, it is possible to further improve safety after gas discharge.

Further, since the wall 980 has fire resistance, the wall 980 is less likely to be deformed by heat, and, for example, it is possible to suppress the formation of a hole in the wall 980. Therefore, combustion of power storage device 1 itself can be suppressed more reliably, and safety after gas discharge can be further improved.

Note that in this embodiment, a case is illustrated in which a space S between adjacent power storage devices 1 is covered by a wall 980. However, wall 980 only needs to cover the space between the power storage device and the adjacent portion adjacent thereto. In addition to the power storage device, the adjacent portion includes an electric circuit unit, a side wall of the rack 901b, a member other than the power storage device housed in the rack 901b, and the like.

(others)
Although the power storage device 1 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. In other words, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

For example, in the embodiment described above, the case where the protrusion 180 has the elastic body 151 and has a tapered shape is illustrated. However, the protrusion does not need to have an elastic body. In this case, at least one of the connection portion 15c of the exterior body support 15 and the connection portion 17c of the exterior body lid 17 may be shaped to taper in the thickness direction. FIG. 15 is a side view showing a schematic configuration of a protrusion 180c according to a modification. As shown in FIG. 15, among the connecting portion 15cc of the exterior body support 15 and the connecting portion 17cc of the exterior body lid 17, which form the protruding portion 180c, by folding back the tip of the connecting portion 17cc upward, the protruding portion The tip of 180c has a tapered shape in the thickness direction. Note that the protrusion may have a uniform shape in the thickness direction. The protrusion may have a shape tapered in the width direction (X-axis direction).

Further, in the embodiment described above, the case where the protruding portion 180 is formed by the connecting portion 15c of the exterior body support 15 and the connecting portion 17c of the exterior body lid 17 is illustrated. However, the protruding portion 180 may be formed from only a portion of the exterior body support portion or only a portion of the exterior body lid. The protruding portion 180 may be formed from a member attached later to the exterior body 18 (casing).

Further, in the above embodiment, the case where the protrusion part 180 is arranged below the center P of the end surface 99 is illustrated, but if the protrusion part is arranged below the exhaust port part 51, , may be arranged above the center P.

Further, the present invention can be realized not only as power storage equipment 900 but also as power storage device 1.

Furthermore, the scope of the present invention also includes a configuration constructed by arbitrarily combining each component included in the above embodiment and its modified examples.

INDUSTRIAL APPLICATION This invention is applicable to the electrical storage equipment etc. which have an electrical storage device equipped with electrical storage elements, such as a lithium ion secondary battery.

1 Power storage device 10 Power storage unit 11 Power storage element 11a Container 11b Positive terminal 11c Negative terminal 11d Spacer 12 Busbar frame 13 Busbar 13a Detection wire 13b Connector 14 Exterior body 15 Exterior body support (second reinforcing member)
15a Bottom part 15b Connection part 15c, 15cc Connection part (one end part)
15d Fixed part (other end side)
16 Board unit attachment part 17 Exterior body lid (first reinforcing member)
17a Top section 17b Connection section 17c, 17cc Connection section (one end)
18 Exterior body (casing)
20 Board unit 30 Cable 31 Positive electrode power cable 32 Negative electrode power cable 50 Exhaust portions 51, 51a Exhaust port portion 51e Exhaust port portion 59 Exhaust route 60, 60a Exhaust member 61 Hole portion 62 Contact portion 63 Groove portion 64 Annular portion 65, 65a Lid member 71 First holding part 72 Second holding part 73 Connecting part 99 One end surface 111 Gas discharge valve 141 Notch part 151 Elastic body 151a Inclined surface 159 Installation surface 171 Opening parts 180, 180c Projection part (eaves part)
181 Screw 601 Wall portion 602 Groove 621 Elastic body 651 Top plate portion 652 Wall portion 711 First outer wall portions 711a, 711b First cutout 712 First surrounding wall 713 First partition wall 714 First partition portion 715 First cable route portion 721 Second outer wall portion 721a Second notch 722 Second surrounding wall 723 Second partition wall 724 Second partition portion 725 Second cable route portion 731 Beam portions 900, 900B Power storage equipment 901, 901b Rack 910 Rack body 920 Front cover 925, 935 Slit Group 930 Back cover 940 Shelf board (supporting member)
941 Stopper 942 Support hole 943 Uneven structure 944 Recess 945 Convex 980 Wall 981 Through hole G1 Gas G2 Gas L Electrolyte P Center S Space S1 First space S2 Second space

Claims (5)

A power storage facility comprising a power storage device including a plurality of power storage elements and a support member that supports the power storage device,
The power storage device includes a protrusion that projects in the predetermined direction from one end surface of the power storage device in the predetermined direction,
The support member includes a support hole into which the protrusion is inserted from the predetermined direction ,
By sliding the power storage device while being supported by the support member, the protrusion of the power storage device is inserted into the support hole, and the power storage device and the support member are positioned;
The predetermined direction is a direction in which the power storage device supported by the support member can slide,
The protrusion has a tapered shape that becomes thinner toward the tip in a direction in which the support member supports the power storage device,
A portion of the protrusion disposed in the support hole has the tapered shape.
Electricity storage equipment. A power storage facility comprising a power storage device including a plurality of power storage elements and a support member that supports the power storage device,
The power storage device includes a protrusion that projects in the predetermined direction from one end surface of the power storage device in the predetermined direction,
The support member includes a support hole into which the protrusion is inserted from the predetermined direction,
By sliding the power storage device while being supported by the support member, the protrusion of the power storage device is inserted into the support hole, and the power storage device and the support member are positioned;
The predetermined direction is a direction in which the power storage device supported by the support member can slide,
The protrusion has an elastic body that is pressed by the support hole.
Electricity storage equipment. A power storage facility comprising a power storage device including a plurality of power storage elements and a support member that supports the power storage device,
The power storage device includes a protrusion that projects in the predetermined direction from one end surface of the power storage device in the predetermined direction,
The support member includes a support hole into which the protrusion is inserted from the predetermined direction,
By sliding the power storage device while being supported by the support member, the protrusion of the power storage device is inserted into the support hole, and the power storage device and the support member are positioned;
The predetermined direction is a direction in which the power storage device supported by the support member can slide,
A periphery of the support hole is provided with an uneven structure that contacts the protrusion.
Electricity storage equipment. The power storage device has a casing that covers the plurality of power storage elements,
The power storage equipment according to any one of claims 1 to 3, wherein the housing includes the protrusion. The power storage equipment according to any one of claims 1 to 4, wherein the power storage device has an end on the other end side in the predetermined direction fixed to the support member.

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