JP6379590B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including one or more power storage elements and an exterior body disposed outside the one or more power storage elements.

  2. Description of the Related Art A power storage device including a power storage element is known in which an exhaust passage from a safety valve of the power storage element is formed. Here, in the case where a plurality of power storage devices are arranged, a flow path that can exhaust exhaust from all the power storage devices is required.

  For this reason, the structure which can form the flow path which discharges | emits the exhaust_gas | exhaustion from a some electrical storage apparatus is proposed (for example, refer patent document 1). In this configuration, a gas flow path from the battery is formed by connecting a plurality of batteries (power storage devices) with a joint such as a three-way joint or a four-way joint.

Japanese Patent Laid-Open No. 10-149806

  However, in the above-described conventional configuration, a plurality of power storage devices are connected by a joint to form an exhaust passage, and thus there is a problem that the configuration for forming the exhaust passage is complicated.

  The present invention has been made to solve the above problems, and an object thereof is to provide a power storage device that can form an exhaust passage with a simple configuration.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention is a power storage device including one or more power storage elements and an exterior body arranged outside the one or more power storage elements, A safety valve provided in any one of the one or more power storage elements, and the exterior body includes a first exhaust that is exhaust from the safety valve, or a safety valve provided in an adjacent power storage device It has two outer surfaces each formed with an opening through which the second exhaust, which is an exhaust, passes.

  According to this, in the power storage device, the exterior body has an opening through which the first exhaust that is exhaust from the safety valve of the power storage element or the second exhaust that is exhaust from the safety valve included in the adjacent power storage device is passed. It has two outer surfaces formed. That is, with respect to two adjacent power storage devices, the exhaust path can be formed by arranging the outer surfaces on which the openings are formed adjacent to each other so that the openings face each other. For this reason, it is not necessary to arrange a member such as a joint between the power storage devices, and an exhaust passage can be formed with a simple configuration.

  An opening formed on the first surface of the two outer surfaces discharges the first exhaust without discharging the second exhaust, and discharges the first exhaust. Instead, the second exhaust may be discharged, or the first exhaust or the second exhaust may be received.

  According to this, in the power storage device, since the first opening that mainly discharges the first exhaust is formed on the first surface, a flow path that efficiently discharges the first exhaust can be formed. it can. In addition, the first surface is formed with a second opening that is used for purposes other than the discharge of the first exhaust, so that a flow path for efficiently passing the exhaust for purposes other than the discharge of the first exhaust is formed. can do.

In addition, the opening formed on the second surface of the two outer surfaces allows the second exhaust without receiving the third exhaust that is the exhaust from the safety valve included in the power storage device adjacent to the adjacent power storage device. You may decide to have the 3rd opening part which receives, and the 4th opening part which receives the 3rd exhaust gas without receiving the 2nd exhaust gas, or discharges the 1st exhaust gas or the 2nd exhaust gas.

  According to this, in the power storage device, the second surface is formed with the third opening that mainly receives the second exhaust and the fourth opening that is used for other than the reception of the second exhaust. It is possible to form a flow path for efficiently passing the exhaust gas by distinguishing between receiving the second exhaust gas and not receiving the second exhaust gas.

  The opening formed on the first surface of the two outer surfaces and the opening formed on the second surface are formed at corresponding positions, and the first surface or the second surface May be arranged to face the second surface or the first surface of the adjacent power storage device.

  According to this, in the power storage device, the opening formed on the first surface or the second surface and the opening formed on the second surface or the first surface included in the adjacent power storage device are at corresponding positions. Since the first surface and the second surface are opposed to each other, the openings are connected to each other. Thereby, the exhaust flow path can be formed with a simple configuration.

  The exterior body includes a lid body provided with the two outer surfaces, and the lid body is disposed on the safety valve side of the one or more power storage elements, and the safety valve side of the one or more power storage elements. You may decide to regulate the movement to.

  According to this, since the exterior body has the lid body, and the exhaust passage can be formed by the lid body, the exhaust passage can be formed with a simple configuration. Further, since the exterior body can press the power storage element from above by the lid body, it is possible to suppress the power storage element from being shaken in the exterior body due to vibration or impact.

  Furthermore, an electrical device electrically connected to at least one of the one or more power storage elements may be provided, and the exterior body may hold the electrical device.

  According to this, the exterior body can also have the function to hold | maintain an electric equipment.

  The exterior body may include a wall portion disposed between any one of the openings formed on the two outer surfaces and the electric device.

  According to this, since the exterior body has a wall portion between the opening portion and the electric device, even if high-temperature exhaust gas flows from the opening portion, the heat of the exhaust gas is electrically generated by the wall portion. The influence on the device can be suppressed.

  In addition, the exterior body may be arranged so that the exterior surface of the adjacent power storage device and the outer surface are in contact with each other.

  According to this, since the adjacent power storage devices are arranged so that the outer surfaces of the exterior body are in contact with each other, it is not necessary to arrange piping or the like that allows exhaust from the safety valve to pass between the adjacent power storage devices. Therefore, the power storage device can be arranged with a simple configuration.

  Further, the outer surface on which the opening for allowing the first exhaust to pass may be disposed at a position facing the exhaust port outside the power storage device.

  According to this, the outer surface on which the opening portion through which the first exhaust gas is passed is formed at a position facing the exhaust port outside the power storage device. For this reason, the first exhaust is discharged with the flow direction changed to the opening direction of the opening, but after being discharged, the first exhaust flows smoothly to the exhaust port without changing the flow direction. Can do.

  The lid body is disposed between the first lid body provided with the two outer surfaces, the first lid body and the one or more power storage elements, and the safety valve side of the one or more power storage elements. You may decide to have the 2nd cover body which controls the movement to.

  According to this, the lid body is divided into two members, the first lid body that forms the exhaust passage and the second lid body that presses the power storage element from above, so that the lid body has a simple configuration. Can be formed.

  The wall portion may be arranged in an annular shape so as to surround the outer periphery of the electric device.

  According to this, since the wall portion is disposed so as to surround the electric device, it is possible to further suppress the influence of the heat of the high-temperature exhaust gas flowing from the opening on the electric device.

  According to the power storage device of the present invention, the exhaust passage can be formed with a simple configuration.

It is a perspective view which shows the external appearance of the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows each component at the time of disassembling the unit module which concerns on embodiment of this invention. It is a perspective view which shows the inside of the electrical storage element which concerns on embodiment of this invention seeing through. It is a perspective view which shows the structure of the 1st cover body which concerns on embodiment of this invention. It is sectional drawing which shows the structure at the time of cut | disconnecting the unit module which concerns on embodiment of this invention to an up-down direction. It is a top view which shows the structure at the time of seeing the unit module which concerns on embodiment of this invention from upper direction. It is a top view which shows the structure at the time of seeing the module group which concerns on embodiment of this invention from upper direction. It is a top view which shows the structure at the time of seeing the state by which the some electrical storage apparatus which concerns on embodiment of this invention is arrange | positioned from upper direction. It is a perspective view which shows the structure of the 1st cover body which concerns on the modification 1 of embodiment of this invention. It is a perspective view which shows the structure of the 1st cover body which concerns on the modification 2 of embodiment of this invention. It is a perspective view which shows the structure of the 1st cover body which concerns on the modification 3 of embodiment of this invention. It is a top view which shows the structure of the 1st cover body which concerns on the modification 4 of embodiment of this invention. It is a perspective view which shows the structure of the 1st cover body which concerns on the modification 5 of embodiment of this invention.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

(Embodiment)
First, the configuration of the power storage device 1 will be described.

  FIG. 1 is a perspective view showing an appearance of power storage device 1 according to the embodiment of the present invention. FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment of the present invention is disassembled.

  In these figures, the Z-axis direction is shown as the vertical direction, and the Z-axis direction will be described below as the vertical direction. However, depending on the usage, the Z-axis direction may not be the vertical direction. The axial direction is not limited to the vertical direction. The same applies to the following drawings.

  The power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside. For example, the power storage device 1 is a high-voltage battery module used for power storage applications, power supply applications, and the like.

  As shown in these drawings, the power storage device 1 includes a module group 10 having a plurality of unit modules 11, 12, and 13, a lower connecting member 20, and an upper connecting member 30. The power storage device 1 may have a configuration including only one unit module. In addition, the power storage device 1 may be configured to include a cooling device such as a cooling fan that allows a cooling medium (air or the like) to flow into the inside of the module group 10 at the end on the plus side in the X-axis direction, for example. .

  The module group 10 includes a plurality of unit modules 11, 12, and 13 arranged in a line in the X-axis direction. The unit module 11 is provided with a positive external terminal cover 11a which is a cover for a positive external terminal described later and a negative external terminal cover 11b which is a cover for a negative external terminal described later. The power storage device 1 charges electricity from the outside via the positive electrode external terminal in the positive electrode external terminal cover 11a and the negative electrode external terminal in the negative electrode external terminal cover 11b, and discharges electricity to the outside.

  The unit modules 11, 12, and 13 are rectangular modules in which one or more power storage elements are accommodated in the exterior body 14, and each has the same configuration. Moreover, the positive electrode terminal and negative electrode terminal of the adjacent unit modules among the unit modules 11, 12, and 13 are electrically connected, so that all the power storage elements in the unit modules 11, 12, and 13 are connected in series. Has been. The detailed configuration of the unit modules 11, 12 and 13 will be described later. The unit module 11, 12 or 13 is also referred to as a power storage device.

  The lower connecting member 20 and the upper connecting member 30 are members that connect the plurality of unit modules 11, 12, and 13. The lower connecting member 20 is a lower connecting member, and the upper connecting member 30 is an upper connecting member. It is. That is, the unit modules 11, 12, and 13 are coupled by fixing the unit modules 11, 12, and 13 between the lower coupling member 20 and the upper coupling member 30.

  Specifically, the lower connecting member 20 and the upper connecting member 30 are flat members, and are formed of, for example, metal. Thereby, the unit modules 11, 12, and 13 can be firmly and stably fixed. In addition, an outer package 14 included in each of the plurality of unit modules 11, 12, and 13 is placed on the lower connection member 20.

  Next, the detailed configuration of the unit modules 11, 12, and 13 included in the module group 10 will be described. Since the unit modules 11, 12 and 13 have the same configuration, the unit module 11 will be described below, and the description of the configuration of the unit modules 12 and 13 will be omitted.

  FIG. 3 is an exploded perspective view showing each component when the unit module 11 according to the embodiment of the present invention is disassembled.

  As shown in the figure, the unit module 11 is accommodated in the exterior body 14 including the exterior body main body 100, the first lid body 500, the second lid body 300, and the third lid body 700, and the exterior body 14. A plurality of power storage elements 200 (four power storage elements 200 in the figure) and a substrate 600 are provided. Note that the number of power storage elements 200 accommodated in the exterior body 14 is not limited to a plurality, and a configuration in which only one power storage element 200 is accommodated may be employed.

  The exterior body 14 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the unit module 11 and is disposed outside the power storage element 200. The exterior body 14 arranges the plurality of power storage elements 200, the substrate 600, and the like at predetermined positions, and protects the plurality of power storage elements 200, the substrate 600, and the like from impact and the like. The exterior body 14 is made of an insulating material such as a resin such as polycarbonate or polypropylene (PP), for example, and prevents the power storage element 200 or the substrate 600 from coming into contact with an external metal member or the like.

  Here, the exterior body 14 includes an exterior body main body 100, a first lid body 500, a second lid body 300, and a third lid body 700. The exterior body 100 is a member constituting the body of the exterior body 14, and the first lid 500, the second lid 300, and the third lid 700 are members constituting the lid of the exterior body 14. The first lid 500 and the second lid 300 are members constituting the inner lid of the exterior body 14, and the third lid 700 is a member constituting the outer lid of the exterior body 14.

  The exterior body main body 100 is a bottomed rectangular cylindrical member having an opening formed in the upper part, and a plurality of power storage elements 200 are inserted and accommodated from the opening in the upper part. In addition, a plurality of rectangular openings are annularly formed on the outer surface of the exterior body main body 100 along the inner periphery in order to dissipate the heat generated from the power storage element 200 to the outside of the exterior body main body 100. . Also, exterior body main body openings 121 and 122 through which exhaust from a safety valve 221 of the electricity storage element 200 described later is formed on two outer surfaces facing the exterior body main body 100.

  A partition member 110 is disposed inside the exterior body main body 100.

  The partition member 110 is a member disposed on the side of one of the power storage elements 200 included in the unit module 11. That is, the partition member 110 is a plate-like member that is disposed between two adjacent power storage elements 200 and partitions between the two power storage elements 200. In the present embodiment, three partition members 110 are arranged between four power storage elements 200.

  Here, the partition member 110 is a member having heat insulation properties, and is formed of, for example, a heat insulating material made of mica. Specifically, as an example of the heat insulating material forming the partition member 110, a damma material configured by accumulating and bonding mica pieces can be given. That is, the partition member 110 has a function of suppressing heat transmitted from the power storage element 200 from being transmitted to the adjacent power storage element 200.

  The power storage element 200 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. . The power storage element 200 is disposed between the two inner partition members 110 of the exterior body main body 100 or between the partition member 110 and the wall surface of the exterior body main body 100, and is accommodated in the exterior body main body 100.

  Each power storage element 200 includes a safety valve 221 on the upper surface. That is, each power storage element 200 is accommodated in the exterior body 100 so that the safety valve 221 faces upward, and releases gas from the safety valve 221 upward when the internal pressure rises. In addition, it is not limited to all the electrical storage elements 200 of the electrical storage elements 200 with which the unit module 11 is provided being provided with the safety valve 221, and the at least 1 electrical storage element 200 should just be provided with the safety valve 221.

  In addition, the storage element 200 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery or a capacitor. A detailed description of the storage element 200 will be described later.

  The second lid 300 is a flat rectangular member and is disposed above the plurality of power storage elements 200. That is, the second lid 300 is disposed between the power storage element 200 and the first lid 500. Specifically, the second lid 300 is a member disposed between the plurality of power storage elements 200 and the first lid 500 so as to straddle the plurality of power storage elements 200.

  The second lid 300 has a second lid opening 310 at a position facing the safety valve 221 of the electricity storage device 200. That is, in the second lid 300, four second lid openings 310 are formed corresponding to the safety valves 221 of the four power storage elements 200.

  The second lid opening 310 is a circular through-hole formed larger than the safety valve 221 of the electricity storage device 200, and when the gas is discharged from the safety valve 221, the second lid 300 opens the gas below the second lid 300. From above. The second lid opening 310 may be a large through hole corresponding to two or more safety valves 221, or may be a notch instead of a through hole.

  As described above, the second lid body 300 is disposed on the safety valve 221 side of the electricity storage element 200 and has a function of regulating movement of the electricity storage element 200 toward the safety valve 221 in the exterior body main body 100. . That is, the second lid body 300 is fitted inside the exterior body main body 100 and presses the plurality of power storage elements 200 from above to fix the plurality of power storage elements 200 to the exterior body main body 100.

  Further, the positive electrode external terminal 410, the negative electrode external terminal 420, the bus bar 430, the external wiring connection part 440, and the wiring path forming part 450 are arranged on the second lid 300.

  The positive external terminal 410 is a positive external terminal arranged in the positive external terminal cover 11a shown in FIG. 2, and the negative external terminal 420 is arranged in the negative external terminal cover 11b shown in FIG. The external terminal on the negative electrode side. The positive external terminal 410 and the negative external terminal 420 are electrode terminals for the power storage device 1 to charge electricity from the outside and to discharge electricity to the outside. That is, the power storage device 1 charges electricity from the outside via the positive electrode external terminal 410 and the negative electrode external terminal 420 and discharges electricity to the outside.

  The bus bar 430 is a member disposed above the second lid body 300. The bus bar 430 is a conductive member such as a metal, and electrically connects the plurality of power storage elements 200 to each other. Specifically, bus bar 430 connects the positive electrode terminal or the negative electrode terminal of one power storage device 200 and the negative electrode terminal or the positive electrode terminal of another power storage device 200 in adjacent power storage devices 200.

  The external wiring connection unit 440 is a connector connected to an external wiring, and connects the external wiring and a wiring connected to at least one power storage element 200 among the plurality of power storage elements 200.

  The wiring path forming unit 450 is a member that is arranged so as to straddle between two unit modules between two unit modules, and forms a wiring path for passing wiring between the two unit modules.

  The first lid 500 is a flat rectangular member and is disposed above the second lid 300. That is, the first lid body 500 is disposed between the second lid body 300 and the third lid body 700, and forms an exhaust passage from the safety valve 221 of the power storage element 200. Specifically, the first lid 500 has two outer surfaces each formed with an opening through which the exhaust from the safety valve 221 of the power storage element 200 passes, and guides the exhaust from the safety valve 221 outward. .

  The first lid 500 holds a substrate 600 described later. That is, the first lid 500 is disposed so as to cover the surface of the substrate 600 on the safety valve 221 side. As described above, the first lid 500 forms a flow path for exhaust from the safety valve 221 of the power storage element 200, holds the substrate 600, and also has a function of protecting the substrate 600 from exhaust of the safety valve 221. ing. The detailed description of the first lid 500 will be described later.

  The substrate 600 is an electrical device that is electrically connected to at least one of the power storage elements 200 included in the unit module 11. Specifically, the substrate 600 is a substrate that can acquire, monitor, and control the state of the plurality of power storage elements 200, and is connected to the positive terminal or the negative terminal of the plurality of power storage elements 200 by wiring (lead wire). It is connected.

  Specifically, the substrate 600 is a control substrate for monitoring the charging state and discharging state (battery state such as voltage and temperature) of the plurality of power storage elements 200. For example, the substrate 600 is provided with a control circuit (not shown) for performing the monitoring, controlling the ON / OFF of the relay, and communicating with other devices.

  Further, the substrate 600 is disposed on the first lid body 500 and is disposed so as to be covered with the third lid body 700. That is, the substrate 600 is disposed so as to be protected by the first lid body 500 and the third lid body 700 by being sandwiched between the first lid body 500 and the third lid body 700. Moreover, assembling and maintenance of the power storage device 1 are improved by integrating the electrical components in the upper portion as described above.

  In addition, the board | substrate 600 does not need to be provided in each unit module, For example, the structure provided only in the unit module 11 may be sufficient. Further, the unit module may have a configuration in which other electrical devices such as fuses are arranged on the first lid 500 instead of the substrate 600 as the electrical device.

  The third lid 700 is a flat rectangular member that closes the opening of the exterior body 100. Specifically, a plurality of power storage elements 200, a second lid 300, a first lid 500, a substrate 600, and the like are arranged in this order on the inside of the exterior body 100, and the opening of the exterior body 100 is a third lid. The body 700 is closed. Thus, the stability of the unit module 11 is improved by arranging the plurality of power storage elements 200 that are heavy objects at the bottom.

  Next, the configuration of power storage element 200 will be described in detail.

  FIG. 4 is a perspective view showing power storage element 200 according to the embodiment of the present invention as seen through the inside.

  As shown in the figure, the electricity storage device 200 includes a container 210, a positive terminal 230, and a negative terminal 240, and the container 210 includes a container lid portion 220 that is an upper wall. Further, an electrode body 250, a positive electrode current collector 260, and a negative electrode current collector 270 are disposed inside the container 210, and a safety valve 221 is formed in the container lid portion 220. Note that a liquid such as an electrolytic solution is sealed in the container 210, but the liquid is not shown.

  The container 210 includes a casing main body having a rectangular cylindrical shape made of metal and having a bottom, and a metal container lid portion 220 that closes an opening of the casing main body. In addition, the container 210 can be hermetically sealed by, for example, welding the container lid 220 and the housing body after accommodating the electrode body 250 and the like inside. The material of the container 210 is not particularly limited, but is preferably a weldable metal such as stainless steel or aluminum.

  The electrode body 250 includes a positive electrode, a negative electrode, and a separator, and is a power generation element that can store electricity. Specifically, the electrode body 250 is a wound type formed by winding a layered arrangement so that a separator is sandwiched between a positive electrode and a negative electrode so that the whole becomes an oval shape. It is an electrode body. The electrode body 250 may be a stacked electrode body in which flat plate plates are stacked.

  Here, the positive electrode is an electrode plate in which a positive electrode active material layer is formed on the surface of a long strip-like conductive positive electrode current collector foil made of aluminum or an aluminum alloy, and the negative electrode is made of copper or a copper alloy. It is an electrode plate in which a negative electrode active material layer is formed on the surface of a long strip-like conductive negative electrode current collector foil, and the separator is a microporous sheet. Note that the positive electrode, the negative electrode, and the separator used for the power storage element 200 are not particularly different from those conventionally used, and any known material can be used as long as it does not impair the performance of the power storage element 200. Further, as the electrolytic solution (nonaqueous electrolyte) sealed in the container 210, there is no particular limitation on the type thereof as long as it does not impair the performance of the power storage element 200, and various types can be selected.

  The positive electrode terminal 230 is an electrode terminal electrically connected to the positive electrode of the electrode body 250 via the positive electrode current collector 260, and the negative electrode terminal 240 is the negative electrode of the electrode body 250 via the negative electrode current collector 270. The electrode terminals are electrically connected to the container lid part 220 and are all attached to the container lid part 220. That is, the positive electrode terminal 230 and the negative electrode terminal 240 lead the electricity stored in the electrode body 250 to the external space of the power storage element 200, and in order to store the electricity in the electrode body 250, It is an electrode terminal made of metal for introducing.

  Specifically, among the plurality of power storage elements 200 provided in the power storage device 1, the positive electrode terminal 230 of the power storage element 200 disposed on the positive electrode external terminal 410 side is connected to the positive electrode external terminal 410, and the negative electrode of the power storage element 200 Terminal 240 is connected to positive electrode terminal 230 of adjacent power storage element 200. Similarly, among the plurality of power storage elements 200, the negative electrode terminal 240 of the power storage element 200 arranged on the negative electrode external terminal 420 side is connected to the negative electrode external terminal 420, and the positive electrode terminal 230 of the power storage element 200 is connected to the adjacent power storage element. It is connected to the negative terminal 240 of the element 200. Further, the positive electrode terminal 230 or the negative electrode terminal 240 of the other power storage element 200 is connected to the negative electrode terminal 240 or the positive electrode terminal 230 of the adjacent power storage element 200.

  The positive electrode current collector 260 is a member that is disposed between the positive electrode of the electrode body 250 and the side wall of the container 210 and has electrical conductivity and rigidity that are electrically connected to the positive electrode terminal 230 and the positive electrode. Note that the positive electrode current collector 260 is formed of aluminum or an aluminum alloy, as in the positive electrode current collector foil of the positive electrode. The negative electrode current collector 270 is disposed between the negative electrode of the electrode body 250 and the side wall of the container 210, and has conductivity and rigidity that are electrically connected to the negative electrode terminal 240 and the negative electrode of the electrode body 250. It is a member. The negative electrode current collector 270 is formed of copper, a copper alloy, or the like, like the negative electrode current collector foil.

  Next, the first lid 500 will be described in detail. FIG. 5 is a perspective view showing the configuration of the first lid 500 according to the embodiment of the present invention.

  As shown in the figure, the first lid 500 has a bottom surface portion 510, a side surface portion 520, a wall portion 530, and an exhaust path forming portion 540.

  The bottom surface portion 510 is a rectangular and flat portion that forms the bottom surface of the first lid 500. In the bottom surface portion 510, wiring openings 511 and exhaust openings 541 are formed, and substrate protrusions 512 are provided.

  The wiring opening 511 is a through hole into which a wiring such as a lead wire connected to the positive electrode terminal or the negative electrode terminal of the power storage element 200 is inserted in order to connect the substrate 600. That is, the wiring is inserted into the wiring opening 511 to connect the power storage element 200 below the bottom surface portion 510 and the substrate 600 above the bottom surface portion 510. Note that the size and shape of the wiring opening 511 are not particularly limited as long as the wiring can be inserted.

  The exhaust opening 541 is a through hole through which exhaust from the safety valve 221 of the electricity storage element 200 passes. In the present embodiment, the exhaust opening 541 is a rectangular through-hole, but the exhaust opening 541 has any shape such as a polygonal shape other than a square, a circular shape, or an elliptical shape. It doesn't matter. Further, the exhaust opening 541 has an upper opening covered with an exhaust path forming part 540 described later.

  The substrate projection 512 is a projection for placing the substrate 600 thereon. In this embodiment, six substrate projections 512 are provided, and each substrate projection 512 is inserted into a through-hole formed in the substrate 600 so that the substrate 600 is placed on the bottom surface 510. And fixed. The number and shape of the substrate projections 512 are not particularly limited as long as the substrate 600 can be placed and fixed on the bottom surface 510.

  The side surface portion 520 is a portion that forms the side surface of the first lid body 500 and is a rectangular tube-shaped portion that includes four rectangular and flat side surfaces that cover the four sides of the bottom surface portion 510. The side part 520 has a first surface 520a and a second surface 520b which are two outer surfaces facing each other. In the present embodiment, the first surface 520a is the outer surface on the X axis direction plus side of the four outer surfaces of the side surface portion 520, and the second surface 520b is the X axis direction minus side of the four outer surfaces. It is the outer surface.

  Here, the first surface 520a and the second surface 520b are exhausted from the first exhaust, which is exhaust from the safety valve 221 of the power storage element 200, or from the safety valve provided in the unit module (power storage device) adjacent to the unit module 11. These are two outer surfaces on which openings for allowing the second exhaust to pass are respectively formed.

  Specifically, a first opening 542 and two second openings 543 are formed on the first surface 520a, and a third opening 521 and two second openings 543 are formed on the second surface 520b. Four openings 522 are formed.

  The first opening 542 is a rectangular through hole disposed in the central portion of the first surface 520a. The first opening 542 discharges the first exhaust that is the exhaust from the safety valve 221 of the electricity storage element 200. Specifically, the first opening 542 discharges the first exhaust without discharging the second exhaust that is exhaust from the safety valve provided in the adjacent unit module (power storage device). Details will be described later. The first opening 542 has an opening inside the first lid 500 covered with an exhaust path forming unit 540 described later.

  The second opening 543 is a rectangular through-hole disposed on both sides (Y axis direction plus side and minus side) of the first opening 542. The second opening 543 discharges the second exhaust without discharging the first exhaust, or receives the first exhaust or the second exhaust. Details will be described later.

  The third opening 521 is a rectangular through hole disposed in the central portion of the second surface 520b. The third opening 521 accepts the second exhaust without accepting the third exhaust that is the exhaust from the safety valve provided in the unit module (power storage device) adjacent to the adjacent unit module. Details will be described later.

  The fourth opening 522 is a rectangular through-hole disposed on both sides (Y-axis direction plus side and minus side) of the third opening 521. The fourth opening 522 receives the third exhaust without receiving the second exhaust, or discharges the first exhaust or the second exhaust. Details will be described later.

  The first opening 542, the second opening 543, the third opening 521, or the fourth opening 522 may have any shape such as a polygonal shape other than a quadrangle, a circular shape, or an elliptical shape. It doesn't matter. The first opening 542 or the third opening 521 may have two or more openings, and the second opening 543 or the fourth opening 522 has one or three or more openings. You may have an opening part.

  The wall portion 530 is a flat wall protruding upward from the bottom surface portion 510, and is arranged in an annular shape so as to surround the outer periphery of the substrate 600. Specifically, the wall portion 530 is a quadrangular cylindrical portion including four rectangular and flat side surfaces covering the four sides of the substrate 600. In the present embodiment, the wall portion 530 is formed such that the wall width is longer in the Y-axis direction than in the X-axis direction.

  That is, the wall portion 530 is a wall disposed between one of the openings formed on the first surface 520 a and the second surface 520 b that are the two outer surfaces of the first lid 500 and the substrate 600. Wall portion 530 is formed to have the same height as side surface portion 520 in order to prevent exhaust from safety valve 221 of power storage element 200 from flowing into substrate 600.

  The wall portion 530 is formed with a semicircular wall portion side opening 531 into which wiring is inserted. That is, after a wiring such as a lead wire connected to the storage element 200 is inserted into the wiring opening 511 formed in the bottom surface portion 510, the wiring is also inserted into the wall-side opening 531, and the wiring is connected to the substrate. 600. The size and shape of the wall side opening 531 are not particularly limited as long as the wiring can be inserted.

  The exhaust path forming portion 540 is a member having an arc shape in a cross section (a cross section when cut along the XZ plane) that forms an exhaust path for discharging the first exhaust that is exhaust from the safety valve 221 of the power storage element 200. The exhaust path forming portion 540 has both ends connected to the bottom surface portion 510 and the side surface portion 520 and is formed so as to cover the exhaust opening 541 and the first opening 542.

  That is, the exhaust path forming unit 540 is formed so as to cover the upper opening of the exhaust opening 541 and the inner opening of the first opening 542, and the exhaust opening 541 and the first opening 542 are covered. Thus, the inner side and the outer side of the first lid body 500 do not communicate with each other. As a result, the inner side and the outer side of the first lid body 500 are cut off, so that the exhaust from the safety valve 221 of the power storage element 200 that has passed through the exhaust opening 541 flows into the inner side of the first lid body 500. Without passing through, the first opening 542 is discharged to the outside of the first lid 500.

  Next, the exhaust flow from the safety valve 221 of the electricity storage element 200 in the unit module 11 will be described in detail.

  FIG. 6 is a cross-sectional view showing a configuration when the unit module 11 according to the embodiment of the present invention is cut in the vertical direction. FIG. 7 is a plan view showing a configuration when the unit module 11 according to the embodiment of the present invention is viewed from above. In the figure, the third lid 700 is seen through.

  As shown in these drawings, when the first exhaust is discharged from the safety valve 221 of the electricity storage element 200, the first exhaust passes through the second lid opening 310 formed in the second lid 300, It flows into the space between the first lid 500 and the second lid 300. Then, the first exhaust flows through the exhaust opening 541 and flows into the space in the exhaust path forming unit 540, and is discharged from the first opening 542 to the outside of the first lid 500.

  Here, the first exhaust is discharged from the first opening 542 to the outside of the first lid 500 without flowing into the first lid 500 by the exhaust path forming portion 540. Further, the exhaust path forming portion 540 prevents any exhaust other than the first exhaust from flowing into the space between the first lid 500 and the second lid 300 from the outside of the first lid 500. For this reason, the first opening 542 discharges the first exhaust without discharging exhaust other than the first exhaust.

  In addition, the first exhaust is not discharged from the second opening 543, but exhaust other than the first exhaust flowing into the first lid 500 from the outside of the first lid 500 is discharged, or First exhaust or exhaust other than the first exhaust flows.

  Further, the second exhaust discharged from the first opening 542 of the adjacent unit module flows from the third opening 521. Here, since the first opening 542 of the adjacent unit module discharges the second exhaust without discharging the exhaust other than the second exhaust, the exhaust other than the second exhaust flows from the third opening 521. The second exhaust flows in without doing so.

  From the fourth opening 522, the second exhaust does not flow, but exhaust other than the second exhaust flows, or exhaust other than the second exhaust or the second exhaust is discharged.

  In the present embodiment, the exterior body main body opening 121 of the exterior body main body 100 is one large opening that covers the third opening 521 and the two fourth openings 522, but the third opening 521 and Three openings corresponding to the two fourth openings 522 may be formed. Similarly, the exterior body main body opening 122 of the exterior body main body 100 is one large opening that covers the first opening 542 and the two second openings 543, but the first opening 542 and the two second openings 543. Three openings corresponding to the opening 543 may be formed.

  Next, the flow of exhaust from the safety valve 221 of the electricity storage element 200 between the plurality of unit modules will be described in detail.

  FIG. 8 is a plan view showing a configuration when the module group 10 according to the embodiment of the present invention is viewed from above. In the figure, the third lid 700 of each unit module is seen through.

  As shown in the figure, the unit modules 11, 12 and 13 are adjacent to each other so that the outer surfaces of the exterior body 14 (the outer surface of the exterior body main body 100 in the figure) of two adjacent unit modules are in contact with each other. Has been placed. The two adjacent unit modules may be arranged adjacent to each other so that the outer surfaces of the first lid 500 are in contact with each other.

  In addition, a first opening 542 and two second openings 543 which are openings formed in the first surface 520a of the side surface portion 520 of the first lid 500, and an opening formed in the second surface 520b. A certain third opening 521 and two fourth openings 522 are formed at corresponding positions. Moreover, the 1st surface 520a or the 2nd surface 520b is arrange | positioned so that the 2nd surface 520b or the 1st surface 520a with which an adjacent unit module (electric storage apparatus) is provided may be opposed.

  Thereby, the 1st opening part 542 and the 3rd opening part 521 in two adjacent unit modules are connected. In addition, two second openings 543 and two fourth openings 522 in two adjacent unit modules are connected.

  Here, first, exhaust from the safety valve 221 of the power storage element 200 in the unit module 11 is referred to as first exhaust g1 and g2, and exhaust from the safety valve 221 of the power storage element 200 in the unit module 12 adjacent to the unit module 11 is second exhaust. Let g3 and g4. Further, the exhaust from the safety valve 221 of the power storage element 200 in the unit module 13 adjacent to the unit module 12 is referred to as a third exhaust g7.

  In this case, the first opening 542 of the unit module 11 discharges the first exhausts g1 and g2 without discharging the second exhausts g3 and g4. Further, the second opening 543 of the unit module 11 receives the first exhaust g1 and the second exhaust g3 without discharging the first exhaust g1 and g2. Further, the third opening 521 of the unit module 11 does not accept any exhaust. The fourth opening 522 of the unit module 11 discharges the first exhaust g1 and the second exhaust g3 (exhaust g5) without receiving the second exhausts g3 and g4.

  Next, exhaust from the safety valve 221 of the power storage element 200 in the unit module 12 is referred to as first exhaust g3 and g4, and exhaust from the safety valve 221 of the power storage element 200 in the unit module 11 and the unit module 13 adjacent to the unit module 12 is first. Two exhausts g1, g2, and g7 are set.

  In this case, the first opening 542 of the unit module 12 discharges the first exhaust g3, g4 without discharging the second exhaust g1, g2, g7. Further, the second opening 543 of the unit module 12 discharges the second exhaust g2 without receiving the first exhaust g3 and g4, and receives the first exhaust g3. Further, the third opening 521 of the unit module 12 receives the second exhausts g1 and g2 without receiving any exhaust other than the second exhausts g1 and g2. Further, the fourth opening 522 of the unit module 12 discharges the first exhaust g3 and the second exhaust g1 without receiving the second exhausts g1 and g2.

  Next, exhaust from the safety valve 221 of the power storage element 200 in the unit module 13 is referred to as first exhaust g7, and exhaust from the safety valve 221 of the power storage element 200 in the unit module 12 adjacent to the unit module 13 is referred to as second exhaust g3 and g4. To do. Further, exhaust from the safety valve 221 of the power storage element 200 in the unit module 11 adjacent to the unit module 12 is referred to as third exhaust g1 and g2.

  In this case, the first opening 542 of the unit module 13 discharges the first exhaust g7 without discharging the second exhausts g3 and g4. The second opening 543 of the unit module 13 discharges the second exhaust g4 and the third exhaust g2 (exhaust g6) without discharging the first exhaust g7. Further, the third opening 521 of the unit module 13 receives the second exhausts g3 and g4 without receiving the third exhausts g1 and g2. Moreover, the 4th opening part 522 of the unit module 13 receives the 3rd exhaust g2, without receiving the 2nd exhaust g3 and g4, and discharges the 2nd exhaust g3.

  As described above, in the unit modules 11 to 13, the first opening 542 discharges the first exhaust without discharging the second exhaust. The second opening 543 discharges the second exhaust without discharging the first exhaust, or receives the first exhaust or the second exhaust. Further, the third opening 521 receives the second exhaust without receiving the third exhaust. The fourth opening 522 receives the third exhaust without receiving the second exhaust, or discharges the first exhaust or the second exhaust.

  Next, the flow of exhaust from the safety valve 221 of the power storage element 200 when a plurality of power storage devices 1 are arranged will be described in detail.

  FIG. 9 is a plan view showing a configuration when the state in which the plurality of power storage devices 1 according to the embodiment of the present invention are arranged is viewed from above.

  As shown in the figure, the plurality of power storage devices 1 are accommodated in the power storage device container 2, and the exhaust G1 from the safety valve 221 of the power storage element 200 provided in the plurality of power storage devices 1 is exhausted by the fan 3. It is discharged to the outside of the power storage device container 2 as G2.

  Thus, the exhaust G1 in the plurality of power storage devices 1 is discharged to the outside of the power storage device container 2 by the air flow (flow from the X axis direction negative side to the positive side) by the fan 3. In addition, it may replace with the fan 3 and the structure provided with the exhaust port may be sufficient.

  That is, the first surface 520a, which is the outer surface on which an opening for allowing the exhaust (first exhaust) from the safety valve 221 of the power storage element 200 to pass, is an exhaust port outside the power storage device 1 (the exhaust where the fan 3 is disposed). It is arranged at a position facing the mouth.

  As described above, according to the power storage device (unit module) according to the embodiment of the present invention, the exterior body 14 includes the first exhaust that is the exhaust from the safety valve 221 of the power storage element 200 or the adjacent unit module. It has two outer surfaces each formed with an opening through which the second exhaust, which is the exhaust from the safety valve 221 provided, passes. That is, with respect to two adjacent unit modules, an exhaust path can be formed by arranging the outer surfaces on which the openings are formed adjacent to each other so that the openings face each other. For this reason, it is not necessary to arrange a member such as a joint between the unit modules, and an exhaust passage can be formed with a simple configuration.

  Further, in the unit module, since the first opening 542 that mainly discharges the first exhaust is formed on the first surface 520a, a flow path that efficiently discharges the first exhaust can be formed. .

  In the unit module (power storage device), the first surface 520a is formed with a second opening 543 that is used in addition to the discharge of the first exhaust, so that the exhaust for purposes other than the discharge of the first exhaust is performed. Can be formed.

  In the unit module (power storage device), the second surface 520b is formed with a third opening 521 that mainly receives the second exhaust, and a fourth opening 522 that is used for other than the reception of the second exhaust. Therefore, it is possible to form a flow path for efficiently passing the exhaust gas by distinguishing between receiving the second exhaust gas and not receiving the second exhaust gas.

  These exhaust flows can prevent the exhaust from the power storage element 200 from being hindered by the exhaust from the power storage elements 200 in other unit modules. Moreover, it can prevent that the electrical storage element 200 is heated by the exhaust_gas | exhaustion from the electrical storage element 200 in another unit module.

  In the unit module (power storage device), an opening formed on the first surface 520a or the second surface 520b and an opening formed on the second surface 520b or the first surface 520a included in the adjacent unit module are Since the first surface 520a and the second surface 520b are opposed to each other, the openings are connected to each other. Thereby, the exhaust flow path can be formed with a simple configuration.

  Moreover, the exterior body 14 has a lid body (inner lid) composed of the first lid body 500 and the second lid body 300, and an exhaust passage can be formed by the lid body. The exhaust passage can be formed with a simple configuration.

  Moreover, since the exterior body 14 can hold down the electrical storage element 200 from above by the lid body, the electrical storage element 200 can be prevented from shaking in the exterior body 14 due to vibration, impact, or the like.

  In addition, the lid body is divided into two members, that is, a first lid body 500 that forms an exhaust passage and a second lid body 300 that presses the storage element 200 from above, so that the lid body can be configured with a simple configuration. A lid can be formed.

  Moreover, the exterior body 14 can also have the function to hold | maintain the board | substrate 600 with the said cover body.

  In addition, since the first lid 500 has a wall portion 530 between the openings of the first surface 520a and the second surface 520b and the substrate 600, even if high-temperature exhaust gas flows from the openings. The wall portion 530 can suppress the influence of the heat of the exhaust gas on the substrate 600.

  In addition, since the wall portion 530 is disposed so as to surround the substrate 600, the influence of the high-temperature exhaust gas flowing from the opening on the substrate 600 can be further suppressed.

  Further, since the adjacent unit modules are arranged so that the outer surfaces of the exterior body 14 are in contact with each other, it is not necessary to arrange piping or the like that allows exhaust from the safety valve 221 to pass between the adjacent unit modules. For this reason, a unit module can be arrange | positioned with a simple structure.

  In addition, first surface 520 a formed with an opening through which the first exhaust gas is passed is disposed at a position facing the exhaust port outside power storage device 1. For this reason, the first exhaust is discharged with the flow direction changed to the opening direction of the opening, but after being discharged, the first exhaust flows smoothly to the exhaust port without changing the flow direction. Can do.

(Modification 1)
Next, Modification 1 of the above embodiment will be described. FIG. 10 is a perspective view showing the configuration of the first lid body 501 according to the first modification of the embodiment of the present invention. Specifically, this figure corresponds to FIG. 5 in the above embodiment.

  As shown in the figure, in the first lid 501 in the present modification, a first opening 542 and two second openings 543 are formed on the first surface 520a as in the above embodiment. In the second surface 520b, a third opening 521 and two fourth openings 522 are formed.

  Here, the two second openings 543, the third opening 521, and the two fourth openings 522 in the present modification are not through holes, but are notches. Also according to this configuration, by placing the third lid 700 on the first lid 501, the upper portions of the second opening 543, the third opening 521, and the fourth opening 522 can be closed. Therefore, the configuration is the same as in the above embodiment. Since the other configuration is the same as that of the first lid 500 in the above embodiment, detailed description thereof is omitted.

  As described above, according to the power storage device according to the first modification of the embodiment of the present invention, the same effects as those of the above embodiment can be obtained. In particular, by making the opening on the outer surface of the first lid 501 a notch, the opening area of the opening can be increased, so that the exhaust passage from the safety valve can be widened.

(Modification 2)
Next, a second modification of the above embodiment will be described. FIG. 11 is a perspective view showing the configuration of the first lid 502 according to the second modification of the embodiment of the present invention. Specifically, this figure corresponds to FIG. 5 in the above embodiment.

  As shown in the figure, the first lid 502 in this modification is not provided with the exhaust path forming portion 540 in the above embodiment. Since the other configuration is the same as that of the first lid 500 in the above embodiment, detailed description thereof is omitted.

  As described above, according to the power storage device according to the second modification of the embodiment of the present invention, the same effects as those in the above embodiment can be obtained. In particular, since the first lid 502 is not provided with the exhaust path forming portion 540, the flow path of the first exhaust from the safety valve 221 can be widened.

(Modification 3)
Next, Modification 3 of the above embodiment will be described. FIG. 12 is a perspective view showing a configuration of the first lid body 503 according to the third modification of the embodiment of the present invention. Specifically, this figure corresponds to FIG. 5 in the above embodiment.

  As shown in the figure, the first lid 503 in this modification has a wall 532 instead of the wall 530 of the first lid 500 in the above embodiment. The wall portion 532 is formed so as to cover approximately half of the second surface 520b side of the substrate 600. Since the other configuration is the same as that of the first lid 500 in the above embodiment, detailed description thereof is omitted.

  As described above, according to the power storage device according to Modification 3 of the embodiment of the present invention, the same effects as those in the above embodiment can be obtained. In particular, the configuration of the wall portion 532 can be simplified by covering only the second surface 520b side, on which the substrate 600 is easily affected by heat due to exhaust, so that productivity can be improved and costs can be reduced. .

  Note that the wall portion 532 may be configured by a single plate-like member formed so as to cover only the second surface 520b side of the substrate 600, or only a part of the second surface 520b side of the substrate 600. It may be formed so as to cover.

(Modification 4)
Next, Modification 4 of the above embodiment will be described. FIG. 13 is a plan view showing the configuration of the first lid body 504 according to the modification 4 of the embodiment of the present invention.

  As shown in the figure, the first lid 504 in this modification has a wall portion 533 instead of the wall portion 530 of the first lid 500 in the above embodiment.

  The wall portion 533 is formed in an annular shape so that the width of the wall is longer in the X-axis direction in which exhaust gas flows than in the Y-axis direction. That is, the substrate 601 is disposed on the first lid 504 so that the X-axis direction is longer than the Y-axis direction. Since the other configuration is the same as that of the first lid 500 in the above embodiment, detailed description thereof is omitted.

  As described above, according to the power storage device according to Modification 4 of the embodiment of the present invention, the same effects as those in the above embodiment can be obtained. In particular, since the wall portion 533 is formed so that the direction in which the exhaust flows is longer, the flow path through which the exhaust flows can be widened.

(Modification 5)
Next, Modification 5 of the above embodiment will be described. FIG. 14 is a perspective view showing a configuration of a first lid body 505 according to Modification 5 of the embodiment of the present invention. Specifically, this figure corresponds to FIG. 5 in the above embodiment.

  In the said embodiment, although the 1st surface 520a and the 2nd surface 520b of the 1st cover body 500 were arrange | positioned in the position which opposes, as shown to the figure, the 1st cover body 505 in this modification is The first surface 520a and the second surface 520b are disposed adjacent to each other.

  That is, the first surface 520a in which the first opening 542 and the two second openings 543 are formed, and the second surface 520b in which the third opening 521 and the two fourth openings 522 are formed. Are placed adjacent to each other. Since the other configuration is the same as that of the first lid 500 in the above embodiment, detailed description thereof is omitted.

  As described above, according to the power storage device according to Modification 5 of the embodiment of the present invention, the same effects as those in the above embodiment can be obtained. In particular, since the second surface 520b is disposed on the surface in the Y-axis direction, the unit modules can be disposed side by side in the Y-axis direction.

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

  For example, in the above-described embodiment and its modification, the first lid 500 and the second lid 300 are formed separately, but the first lid 500 and the second lid 300 are different from each other. It may be formed integrally.

  Moreover, in the said embodiment and its modification, suppose that the 1st surface 520a and the 2nd surface 520b which are two outer surfaces which have an opening part were provided in the 1st cover body 500. As shown in FIG. However, the first surface 520a and the second surface 520b, which are two outer surfaces having openings, may be provided on the exterior body main body 100, the third lid body 700, or the second lid body 300.

  Moreover, in the said embodiment and its modification, a plurality of unit modules (power storage devices) were arranged in contact with the outer surface. However, the plurality of unit modules (power storage devices) may not be arranged so that the outer surfaces are in contact with each other, and may be arranged with a small gap.

  The present invention can be applied to a power storage device in which one or more power storage elements are housed in an exterior body.

DESCRIPTION OF SYMBOLS 1 Power storage device 2 Power storage device container 3 Fan 10 Module group 11, 12, 13 Unit module 11a Positive electrode external terminal cover 11b Negative electrode external terminal cover 14 Exterior body 20 Lower side connection member 30 Upper side connection member 100 Exterior body main body 110 Partition member 121, 122 exterior body main body opening 200 power storage element 210 container 220 container lid 221 safety valve 230 positive electrode terminal 240 negative electrode terminal 250 electrode body 260 positive electrode current collector 270 negative electrode current collector 300 second lid body 310 second lid body opening 410 positive electrode External terminal 420 Negative electrode external terminal 430 Bus bar 440 External wiring connection portion 450 Wiring path forming portion 500, 501, 502, 503, 504, 505 First lid 510 Bottom surface portion 511 Wiring opening portion 512 Substrate projection portion 520 Side surface portion 520a First side 520b Second side 5 DESCRIPTION OF SYMBOLS 1 3rd opening part 522 4th opening part 530, 532, 533 Wall part 531 Wall part side opening part 540 Exhaust path formation part 541 Exhaust opening part 542 1st opening part 543 2nd opening part 600,601 Substrate 700 3rd Lid

Claims (8)

A power storage device comprising one or more power storage elements and an exterior body disposed outside the one or more power storage elements,
A safety valve that is provided in any one of the one or more power storage elements and discharges the first exhaust;
The exterior body includes a first opening that discharges the first exhaust, a third opening that receives a second exhaust that is exhaust from a safety valve included in an adjacent power storage device, and an opening that discharges the second exhaust. And having a second opening different from the first opening,
The first opening is disposed adjacent to a position facing a third opening included in the adjacent power storage device, or the third opening is opposed to a first opening included in the adjacent power storage device. A power storage device disposed adjacent to the position to be operated. The exterior body further includes an exhaust path forming portion that forms an exhaust path for discharging the first exhaust without flowing the second exhaust.
It said first opening is disposed in said exhaust path, and discharging the first exhaust without discharging the second exhaust,
Said second opening, said arranged outside the exhaust passage, the electric storage device according to claim 1 you discharging the second exhaust without discharging the first exhaust. The third opening is an exhaust path that discharges the second exhaust without allowing the third exhaust, which is exhaust from a safety valve included in the adjacent power storage device, to the adjacent power storage device to flow into the adjacent power storage device. is arranged opposite the opening disposed within, accept the second exhaust without receiving the third exhaust,
The exterior body further includes:
Arranged opposite to the opening disposed outside the exhaust path of the adjacent power storage device, accepts the third exhaust without accepting the second exhaust, or the first exhaust or the second exhaust the power storage device according to claim 1 or 2 having a fourth opening for discharging. A power storage device comprising one or more power storage elements and an exterior body disposed outside the one or more power storage elements,
A safety valve that is provided in any one of the one or more power storage elements and discharges the first exhaust;
The exterior body includes a first opening that discharges the first exhaust and a third opening that receives a second exhaust that is exhaust from a safety valve included in an adjacent power storage device, and the second opening Exhaust the exhaust,
The first opening is disposed adjacent to a position facing a third opening included in the adjacent power storage device, or the third opening is opposed to a first opening included in the adjacent power storage device. Placed adjacent to
The exterior body has a lid provided with the first opening and the third opening ,
The lid is disposed on the safety valve side of the one or more power storage elements, and restricts movement of the one or more power storage elements to the safety valve side.
A charge reservoir. A power storage device comprising one or more power storage elements and an exterior body disposed outside the one or more power storage elements,
A safety valve that is provided in any one of the one or more power storage elements and discharges the first exhaust;
The exterior body includes a first opening that discharges the first exhaust and a third opening that receives a second exhaust that is exhaust from a safety valve included in an adjacent power storage device, and the second opening Exhaust the exhaust,
The first opening is disposed adjacent to a position facing a third opening included in the adjacent power storage device, or the third opening is opposed to a first opening included in the adjacent power storage device. Placed adjacent to
The power storage device further includes:
An electrical device electrically connected to at least one of the one or more power storage elements;
The outer body, that holds the electrical equipment
A charge reservoir.   The exterior body has a wall portion disposed between any one of the openings formed on the outer surface of the exterior body and the electrical device.
  The power storage device according to claim 5. A power storage device comprising one or more power storage elements and an exterior body disposed outside the one or more power storage elements,
A safety valve that is provided in any one of the one or more power storage elements and discharges the first exhaust;
The exterior body includes a first opening that discharges the first exhaust and a third opening that receives a second exhaust that is exhaust from a safety valve included in an adjacent power storage device, and the second opening Exhaust the exhaust,
The first opening is disposed adjacent to a position facing a third opening included in the adjacent power storage device, or the third opening is opposed to a first opening included in the adjacent power storage device. Placed adjacent to
The outer surface of the exterior body where the first opening is formed is disposed at a position facing the exhaust port outside the power storage device.
A charge reservoir. The power storage device according to any one of claims 1 to 7, wherein the exterior body is disposed such that an exterior body included in an adjacent power storage device and outer surfaces are in contact with each other.

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