JP2017152165A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent adhesive agent for adhesively fixing a first exterior body and a second exterior body from damaging the external appearance of a power storage device.SOLUTION: An exterior body 10 of a power storage device 1 includes a first exterior body 11 and a second exterior body 12 disposed above the first exterior body 12. The first exterior body 11 has a first circumferential edge portion 113 forming a first opening 112 opening upwards. The second exterior body 12 has a second circumferential edge portion 123 which forms a second opening 122 opening downwards and confronts the first circumferential edge portion 113 from the outside. The upper end face 1131 of the first circumferential edge portion 113 and the second exterior body 12 are adhesively attached to each other with an adhesive agent 50. At least one of the outer surface of the first circumferential edge portion 113 which faces the second circumferential edge portion 123, and the inner surface of the second circumferential edge portion 123 which faces the first circumferential edge portion 113 is provided with a projection (first projection 114, second projection 127) projecting to the other surface.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a power storage device including a power storage element and an exterior body.

  Conventionally, a power storage device in which a plurality of power storage elements are housed in an exterior body is known (see, for example, Patent Document 1). The exterior body includes a first exterior body that is a container body having an opening and a second exterior body that is a lid body, and a plurality of power storage elements are accommodated in the first exterior body, and then the second exterior body The body is configured to seal the opening of the first exterior body.

Japanese Patent Laying-Open No. 2015-11849

  By the way, an adhesive may be used to fix the first exterior body and the second exterior body, but before the adhesive is cured, it hangs down on the outer surface of the first exterior body and is exposed to the outside. There is a risk of deteriorating the appearance of the power storage device itself.

  For this reason, an object of the present invention is to prevent the adhesive for bonding and fixing the first exterior body and the second exterior body from deteriorating the appearance of the power storage device.

  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 a power storage element and an exterior body, and the exterior body is located above the first exterior body and the first exterior body. A first exterior body having a first peripheral edge that forms a first opening opened upward, and the second exterior body is a second exterior opened downward. It has an opening and has a second peripheral edge that faces the first peripheral edge from the outside, and the upper end surface of the first peripheral edge and the second exterior body are bonded by an adhesive, and the first peripheral edge A protrusion projecting toward the other is formed on at least one of the outer surface facing the second peripheral edge of the portion and the inner surface facing the first peripheral edge of the second peripheral edge.

  According to this, at least one of the outer surface facing the second peripheral edge in the first peripheral edge and the inner surface facing the first peripheral edge in the second peripheral edge has a protrusion protruding toward the other. Since it is formed, even if the adhesive overflows from the upper end surface of the first peripheral edge, it is possible to prevent the adhesive from drooping downward.

  In addition, since the second peripheral edge portion is disposed outward from the first peripheral edge portion, the adhesive above the protrusion can be covered and the appearance of the power storage device itself can be improved.

  In addition, a first protrusion that is a protrusion is formed on the outer surface of the first peripheral edge, and the second peripheral edge includes a skirt that extends downward from the first protrusion, and the inner surface of the skirt has The second protrusion facing the lower surface of the first protrusion may be formed as a protrusion.

  According to this, since the first protrusion is formed on the outer side surface of the first peripheral portion of the first exterior body, even if the adhesive overflows from the upper end surface of the first peripheral portion, the first protrusion It is possible to suppress drooping downward. Further, since the skirt portion extends downward from the first protrusion, and the second protrusion is formed on the skirt portion so as to face the lower surface of the first protrusion, the adhesive attached to the first protrusion is applied to the skirt portion. Can be hidden. Therefore, the adhesive is hardly exposed from the appearance of the power storage device, and the appearance of the power storage device itself can be improved.

  In addition, since the second protrusion is provided opposite to the lower surface of the first protrusion, even if the second exterior body tries to float from the first exterior body, the second protrusion comes into contact with the first protrusion and the floating is suppressed. The Thereby, high waterproofness is securable after adhesion | attachment.

  A third protrusion, which is a protrusion, is formed on the outer surface of the first peripheral edge, and a fourth protrusion that is in contact with the upper surface of the third protrusion is formed as a protrusion on the inner surface of the second peripheral edge. The second peripheral edge portion may include a skirt portion extending downward from the third protrusion.

  According to this, since the third protrusion is formed on the outer peripheral surface of the first peripheral portion of the first exterior body, even if the adhesive overflows from the upper end surface of the first peripheral portion, the third protrusion It is possible to suppress drooping downward. Further, in the second exterior body, the skirt portion extends downward from the fourth projection abutting on the upper surface of the third projection, so that the third projection is covered by the skirt portion. Thereby, the adhesive agent adhering to the third protrusion can be hidden by the skirt portion. Therefore, the adhesive is hardly exposed from the appearance of the power storage device, and the appearance of the power storage device itself can be improved.

  In addition, since the fourth protrusion is in contact with the upper surface of the third protrusion and restricts the downward movement of the second exterior body, the position of the second exterior body relative to the first exterior body can be aligned and smoothly Assembly can be performed.

  In addition, a gap for accommodating an adhesive is formed between the second exterior body in a state where the third protrusion is in contact with the fourth protrusion and the upper end surface of the first peripheral edge of the first exterior body. Also good.

  According to this, the clearance gap which accommodates an adhesive agent is positively formed between the 2nd exterior body by which the downward movement was controlled by the 4th protrusion, and the upper end surface of a 1st peripheral part. Therefore, the adhesive can be held in this gap. Therefore, the adhesive strength between the first exterior body and the second exterior body can be stabilized.

  In addition, a first protrusion and a third protrusion, which is a protrusion different from the first protrusion, are arranged in a horizontal direction on the outer surface of the first peripheral edge, and are arranged on the inner surface of the second peripheral edge. The fourth protrusion that contacts the upper surface of the third protrusion may be disposed.

  According to this, since the first protrusion and the third protrusion are arranged side by side in the horizontal direction, dripping of the adhesive can be reliably suppressed by the first protrusion and the third protrusion. Moreover, since the 1st protrusion and the 3rd protrusion are located in a line with the horizontal direction, it can suppress that a 1st exterior body enlarges to an up-down direction.

  Moreover, since the 4th protrusion contact | abutted to the upper surface of a 3rd protrusion is arrange | positioned on the inner surface of a 2nd peripheral part, when a 4th protrusion contact | abuts the upper surface of a 3rd protrusion, The downward movement can be restricted.

  Moreover, the 3rd protrusion and the 1st protrusion which is protrusions different from the said 3rd protrusion may be arrange | positioned along with the horizontal direction in the outer surface of a 1st peripheral part.

  According to this, since the first protrusion and the third protrusion are arranged side by side in the horizontal direction, dripping of the adhesive can be reliably suppressed by the first protrusion and the third protrusion. Moreover, since the 1st protrusion and the 3rd protrusion are located in a line with the horizontal direction, it can suppress that a 1st exterior body enlarges to an up-down direction.

  Further, the lower surface of the second protrusion may be an inclined surface that is inclined outward as it goes downward.

  According to this, since the lower surface of the second protrusion of the second exterior body is an inclined surface that inclines outward as it goes downward, when attaching the second exterior body to the first exterior body, When the inclined surface of the second protrusion of the body slides on the first protrusion, the second peripheral edge of the second exterior body spreads outward. Since the second protrusion gets over the first protrusion by this spreading, the second protrusion can be smoothly arranged below the first protrusion.

  Further, the upper surface of the first protrusion may be an inclined surface that is inclined outward as it goes downward.

  According to this, since the upper surface of the first protrusion is an inclined surface that is inclined outward as it goes downward, the second protrusion of the second exterior body is attached when the second exterior body is attached to the first exterior body. Slides on an inclined surface provided on the first protrusion. Accordingly, the second protrusion can be easily disposed below the first protrusion.

  Moreover, the guide part which guides the 1st peripheral part of a 1st exterior body to an adhesion | attachment position may be provided inward rather than the 2nd peripheral part in a 2nd exterior body.

  According to this, since the guide portion guides the first peripheral portion of the first exterior body to the bonding position, the first peripheral portion of the first exterior body can be smoothly smoothed when the second exterior body is attached to the first exterior body. Can be guided to the bonding position.

  Further, the power storage element may be a non-aqueous electrolyte power storage element.

  Here, the nonaqueous electrolyte storage element generally has more internal members built in the storage device than the water electrolyte storage element. That is, when a nonaqueous electrolyte power storage element is used, the number of members affected by water immersion increases, but the power storage device has the above-described configuration, and thus the above-described effects can be suitably achieved.

  A method for manufacturing a power storage device according to one embodiment of the present invention is a method for manufacturing a power storage device including a power storage element and an exterior body, and the exterior body is disposed above the first exterior body and the first exterior body. The first exterior body has a first peripheral edge portion forming a first opening opened upward, and the second exterior body has a second opening opened downward. None, having a second peripheral edge facing the first peripheral edge from the outside, facing the second peripheral edge of the first peripheral edge and the first peripheral edge of the second peripheral edge A protrusion protruding toward the other is formed on at least one of the inner side surface, and the manufacturing method includes a step of housing the electricity storage element in the first opening of the first exterior body, and a second exterior body. Applying the adhesive and attaching the second exterior body to the first exterior body in which the electricity storage element is accommodated, Including an upper end surface of the first peripheral portion of the Ichigaiso body, and a step of bonding by an adhesive and a second outer body.

  According to this, there can exist an effect equivalent to the above-mentioned electrical storage apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the adhesive agent for adhesive-fixing a 1st exterior body and a 2nd exterior body impairs the external appearance of an electrical storage apparatus.

It is a perspective view which shows the external appearance of the electrical storage apparatus which concerns on embodiment. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage unit which concerns on embodiment. It is a top view which shows schematic structure of the 1st exterior body which concerns on embodiment. It is sectional drawing which shows the assembly state of the 1st exposure port which concerns on embodiment, and a closure member. It is a bottom view which shows schematic structure of the 2nd exterior body which concerns on embodiment. It is sectional drawing which shows the engagement state of the 1st protrusion and 2nd protrusion which concern on embodiment. It is sectional drawing which shows the contact state of the 3rd protrusion and 4th protrusion which concern on embodiment. It is a flowchart which shows the manufacturing method of the electrical storage apparatus which concerns on embodiment. 10 is a top view illustrating a schematic configuration of a first exterior body according to Modification Example 1. FIG. It is sectional drawing which shows the engagement state of the 3rd protrusion and 2nd protrusion which concern on the modification 2. 10 is a cross-sectional view illustrating a schematic configuration of a third protrusion according to Modification Example 3. 10 is a cross-sectional view illustrating a schematic configuration of a second protrusion according to Modification Example 4.

  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. In each drawing, dimensions and the like are not strictly illustrated.

(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 battery module used for power storage use, power supply use, and the like. In particular, in the present embodiment, power storage device 1 is preferably used as a battery for starting an engine of a moving body such as an automobile, a motorcycle, a watercraft, a snowmobile, an agricultural machine, a construction machine, and the like. In this case, the power storage device 1 is installed in an exposed state where it can be easily touched, such as in the hood or trunk of the mobile body, for example, to facilitate maintenance or replacement work. The power storage device 1 can supply power to an external load by itself (single unit) or can be charged from an external power source by itself (single unit). In other words, there is a configuration in which a plurality of battery modules (power storage devices) are connected as a power source for power such as an electric vehicle or a plug-in hybrid electric vehicle and housed in a case to form a battery pack, but the power storage device 1 in the present embodiment is This is different from such a configuration. Note that a battery pack may be configured by electrically connecting a plurality of power storage devices 1 according to an external load or an external power source.

  As illustrated in FIGS. 1 and 2, the power storage device 1 includes an exterior body 10 including a first exterior body 11 and a second exterior body 12. In addition, the power storage device 1 includes a power storage unit 20, a holding member 30, and bus bars 41 and 42 that are accommodated inside the exterior body 10.

  The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1, and can be communicated with the outside only in part and is almost sealed (semi-sealed state). Used in. That is, the exterior body 10 is disposed outside the power storage unit 20, the holding member 30, and the bus bars 41 and 42, and the power storage unit 20 and the like are disposed at predetermined positions to protect the power storage unit 20 and the like from impacts. The exterior body 10 is made of an insulating resin material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polybutylene terephthalate (PBT), or ABS resin. Yes. Thus, the outer package 10 avoids the storage unit 20 and the like from coming into contact with an external metal member or the like.

  Here, the exterior body 10 includes a first exterior body 11 constituting the main body of the exterior body 10 and a second exterior body 12 constituting the lid body of the exterior body 10. The second exterior body 12 is a flat rectangular cover member that closes the opening of the first exterior body 11. The second exterior body 12 is provided with a positive external terminal 13 and a negative external terminal 14. . The power storage device 1 charges electricity from the outside via the positive electrode external terminal 13 and the negative electrode external terminal 14 and discharges electricity to the outside. The first exterior body 11 is a bottomed rectangular cylindrical housing having an opening, and houses the power storage unit 20, the holding member 30, the bus bars 41 and 42, and the like.

  The 1st exterior body 11 and the 2nd exterior body 12 may be formed with the member of the same material, and may be formed with the member of a different material.

  In addition, the specific structure of the 1st exterior body 11 and the 2nd exterior body 12 is mentioned later.

  The power storage unit 20 includes a plurality of power storage elements 100 (in this embodiment, twelve power storage elements 100) and a plurality of bus bars 200, and a positive external terminal 13 provided on the second exterior body 12; It is electrically connected to the negative external terminal 14. That is, the positive electrode terminal of any one of the plurality of power storage elements 100 is electrically connected to the positive external terminal 13 via the bus bar 200. In addition, the negative electrode terminal of any one of the plurality of power storage elements 100 is electrically connected to the negative electrode external terminal 14 via the bus bar 200.

  In addition, the power storage units 20 are arranged in the first exterior body 11 in the X-axis direction in a state where the plurality of power storage elements 100 are vertically arranged. The power storage unit 20 is housed inside the exterior body 10 by covering the second exterior body 12 from above. The detailed configuration of the power storage unit 20 will be described later.

  The holding member 30 is a member that holds the bus bars 41, 42, other wiring members for control, a temperature sensor, and the like. The holding member 30 is a member that can insulate the bus bars 41 and 42 from other members and regulate the positions of the bus bars 41 and 42. In particular, the holding member 30 positions the bus bars 41 and 42 with respect to the bus bar 200 in the power storage unit 20.

  Specifically, the bus bars 41 and 42 are first assembled on the inner surface side of the second exterior body. Next, the holding member 30 is placed above the power storage unit 20 (Z-axis direction plus side) and positioned with respect to the power storage unit 20. Thereafter, the second exterior body 12 is disposed on the holding member 30. At this time, the bus bars 41 and 42 are positioned on the holding member 30 and positioned with respect to the bus bar 200 in the power storage unit 20.

  The holding member 30 is formed of an insulating resin material such as PC, PP, PE, PPS, PBT, or ABS resin. However, the holding member 30 is formed of any material as long as it is an insulating member. It doesn't matter.

  The bus bars 41 and 42 electrically connect the bus bar 200 in the power storage unit 20 to the positive external terminal 13 and the negative external terminal 14 provided on the second exterior body 12. That is, the bus bar 41 is a conductive member that electrically connects the bus bar 200 disposed at one end in the power storage unit 20 and the positive external terminal 13, and the bus bar 42 is disposed at the other end in the power storage unit 20. This is a conductive member that electrically connects the bus bar 200 and the negative external terminal 14.

  The bus bars 41 and 42 are made of, for example, copper as a conductive member, but the material of the bus bars 41 and 42 is not particularly limited. Further, the bus bars 41 and 42 may be formed of members made of the same material, or may be formed of members made of different materials.

  Next, the configuration of the power storage unit 20 will be described in detail.

  FIG. 3 is an exploded perspective view showing each component when the power storage unit 20 according to the embodiment of the present invention is disassembled.

  As shown in the figure, the power storage unit 20 includes a plurality of power storage elements 100, a plurality of bus bars 200, a plurality of spacers 300 (a plurality of first spacers 310, a pair of second spacers 320, and a pair of third spacers 330). ), A pair of clamping members 400, a plurality of restraining members 500, a bus bar frame 600, and a heat shield plate 700.

  The storage element 100 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery (non-lithium battery such as a lithium ion secondary battery). Water electrolyte storage element). A water-based electrolyte battery such as a nickel metal hydride battery or a nickel cadmium battery may be used. The power storage element 100 has a flat rectangular shape and is disposed adjacent to the first spacer 310. That is, each of the plurality of power storage elements 100 is alternately arranged with each of the plurality of first spacers 310 and arranged in the X-axis direction. In the present embodiment, twelve power storage elements 100 are arranged adjacent to eleven first spacers 310 alternately. In addition, the electrical storage element 100 is not limited to a nonaqueous electrolyte secondary battery, A secondary battery other than a nonaqueous electrolyte secondary battery may be sufficient, and a capacitor may be sufficient as it.

  As shown in the figure, the electricity storage device 100 includes a container 110, a positive electrode terminal 120, and a negative electrode terminal 130. An electrode body (power generation element), a current collector (a positive electrode current collector and a negative electrode current collector), and the like are disposed inside the container 110, and a liquid such as an electrolytic solution (nonaqueous electrolyte) is enclosed therein. However, detailed description is omitted.

  The container 110 is composed of a casing main body having a rectangular cylindrical shape made of metal and having a bottom, and a metal lid that closes an opening of the casing main body. In addition, the container 110 can be hermetically sealed by welding the lid and the housing body after accommodating the electrode body and the like inside. As described above, the container 110 is a rectangular parallelepiped having a lid on the positive side in the Z-axis direction, a long side surface on the side surfaces on both sides in the X-axis direction, a short side surface on the side surfaces on both sides in the Y-axis direction, It is a container of shape. The material of the container 110 is not particularly limited, but is preferably a weldable metal such as stainless steel, aluminum, or aluminum alloy.

  The positive electrode terminal 120 is an electrode terminal electrically connected to the positive electrode of the electrode body through a positive electrode current collector, and the negative electrode terminal 130 is electrically connected to the negative electrode of the electrode body through a negative electrode current collector. These are connected electrode terminals, both of which are attached to the lid of the container 110. That is, the positive electrode terminal 120 and the negative electrode terminal 130 lead the electricity stored in the electrode body to the external space of the power storage element 100, and introduce electricity into the internal space of the power storage element 100 in order to store electricity in the electrode body. This is a metal electrode terminal. In the present embodiment, power storage element 100 is arranged with positive electrode terminal 120 and negative electrode terminal 130 facing upward.

  Bus bar 200 is a bus bar that is electrically connected to each of the plurality of power storage elements 100 in power storage unit 20. That is, the bus bar 200 is a conductive member that is electrically connected to each electrode terminal included in the plurality of power storage elements 100, and any one of the electrode terminals included in the plurality of power storage elements 100 is electrically connected to each other. To do. Specifically, the bus bar 200 is disposed on the surface of each electrode terminal included in the plurality of power storage elements 100 and connected (joined) to the electrode terminal.

  In the present embodiment, five bus bars 200 are arranged, and twelve power storage elements 100 include four sets of three power storage elements 100 connected in parallel by the five bus bars 200. The configuration is connected in series. In addition, the bus bar 200 disposed at the end is connected to the above-described bus bars 41 and 42, and is thereby electrically connected to the positive external terminal 13 and the negative external terminal 14.

  The bus bar 200 is made of, for example, aluminum as a conductive member, but the material of the bus bar 200 is not particularly limited. Further, the bus bars 200 may all be formed of members of the same material, or any of the bus bars 200 may be formed of members of different materials.

  The spacer 300 includes a plurality of first spacers 310, a pair of second spacers 320, and a pair of third spacers 330. For example, insulating properties such as PC, PP, PE, PPS, PBT, or ABS resin are used. It is formed with resin. The first spacer 310, the second spacer 320, and the third spacer 330 may be formed of any material as long as they are insulating members, and all are formed of the same material. Alternatively, any one of the spacers may be formed of a member made of a different material.

  The first spacer 310 is a plate-like member that is disposed on the side (X-axis direction plus side or minus side) of the electricity storage element 100 and insulates the electricity storage element 100 from other members. That is, the first spacer 310 is disposed between two adjacent power storage elements 100 and insulates between the two power storage elements 100. In the present embodiment, eleven first spacers 310 are arranged between each of the twelve power storage elements 100.

  In addition, the first spacer 310 is formed so as to cover approximately half of the power storage element 100 on the front side or the back side (substantially half when divided into two in the X-axis direction). That is, a concave portion is formed on both the front side or the back side (both sides in the X-axis direction) of the first spacer 310, and approximately half of the power storage element 100 is inserted into the concave portion. With such a configuration, the first spacer 310 on the side of the power storage element 100 covers most of the power storage element 100, so that the first spacer 310 connects the power storage element 100 and other conductive members. The insulation between them can be improved.

  The second spacer 320 is a plate-like member that is disposed between the clamping member 400 described later and the exterior body 10 and insulates between the clamping member 400 and the exterior body 10. The second spacer 320 also has a function as a buffer member that protects the power storage unit 20 when an external impact is applied to the exterior body 10. In other words, the pair of second spacers 320 are disposed between the pair of sandwiching members 400 and the exterior body 10 so as to sandwich the pair of sandwiching members 400 from both sides, and the power storage elements 100 and the like in the power storage unit 20 are arranged. Insulate and protect from external shocks.

  The third spacer 330 is a plate-like member that is disposed on the outermost side in the X-axis direction of the plurality of power storage elements 100 and insulates the plurality of power storage elements 100 from other members. Specifically, among the plurality of power storage elements 100, the outer surfaces of the pair of outermost power storage elements 100 are not covered by the first spacer 310. The outer surface of the electricity storage element 100 is covered. As a result, the pair of third spacers 330 are disposed between the plurality of power storage elements 100 and the sandwiching member 400, and the plurality of power storage elements 100 and the sandwiching member 400 are insulated.

  The clamping member 400 and the restraining member 500 are members that press the power storage element 100 from the outside in the stacking direction of the electrode bodies of the power storage element 100. That is, the sandwiching member 400 and the restraining member 500 press the respective power storage elements 100 included in the plurality of power storage elements 100 from both sides by sandwiching the plurality of power storage elements 100 from both sides in the stacking direction. Note that the stacking direction of the electrode bodies of the power storage element 100 is a direction in which the positive electrode, the negative electrode, and the separator of the electrode body are stacked, and is the same direction as the arrangement direction (X-axis direction) of the plurality of power storage elements 100. That is, the plurality of power storage elements 100 are arranged in the stacking direction.

  Specifically, the clamping member 400 is a flat plate member (end plate) disposed on both sides in the X-axis direction of the plurality of power storage elements 100, and includes the plurality of power storage elements 100, the plurality of first spacers 310, and the third spacer. 330 is sandwiched and held from both sides in the arrangement direction (X-axis direction) of the plurality of power storage elements 100, the plurality of first spacers 310, and the third spacers 330. The sandwiching member 400 is formed of a metal (conductive) member such as steel or stainless steel from the viewpoint of strength or the like, but is not limited thereto, and is formed of an insulating member having high strength, for example. May be.

  The restraining member 500 is a long and flat member (constraint bar) that is attached to the sandwiching member 400 at both ends and restrains the plurality of power storage elements 100. That is, the restraining member 500 is disposed so as to straddle the plurality of power storage elements 100, the plurality of first spacers 310, and the pair of third spacers 330, and the plurality of power storage elements 100, the plurality of first spacers 310, and the third A restraining force in these alignment directions (X-axis direction) is applied to the spacer 330.

  In the present embodiment, two restraining members 500 are arranged on both sides (Y-axis direction both sides) of the plurality of power storage elements 100, and the plurality of power storage elements 100 are separated from the both sides by the two restraining members 500. Hold and restrain. The restraining member 500 is preferably formed of a metal member such as steel or stainless steel as in the case of the sandwiching member 400, but may be formed of a member other than metal.

  The bus bar frame 600 is a member that can insulate the bus bar 200 from other members and regulate the position of the bus bar 200. In particular, the bus bar frame 600 positions the bus bar 200 with respect to the plurality of power storage elements 100 in the power storage unit 20.

  Specifically, bus bar frame 600 is placed above the plurality of power storage elements 100 (Z-axis direction plus side) and positioned with respect to the plurality of power storage elements 100. In addition, the bus bar 200 is placed and positioned on the bus bar frame 600. As a result, the bus bar 200 is positioned with respect to the plurality of power storage elements 100 and joined to the respective electrode terminals of the plurality of power storage elements 100. The bus bar frame 600 is formed of an insulating resin material such as PC, PP, PE, PPS, PBT, or ABS resin. However, the bus bar frame 600 is formed of any material as long as it is an insulating member. It doesn't matter.

  The heat shield plate 700 is a plate-like member having heat insulation disposed inside the exhaust passage of the safety valve of the power storage element 100. Specifically, heat shield plate 700 is disposed above bus bar frame 600 so as to be positioned above the safety valve of power storage element 100. In other words, the heat shield plate 700 protects electrical equipment such as a circuit board disposed above the power storage unit 20 from the heat of the gas when gas is discharged from the safety valve of the power storage element 100 in an abnormal state or the like. In this embodiment, the heat shield plate 700 is formed of a metal material such as stainless steel having low thermal conductivity. However, the present invention is not limited to this, and any material that has high heat resistance and low thermal conductivity may be used. For example, it may be formed of a resin such as PPS or PBT reinforced with glass fiber, or ceramic.

  In the power storage device 1 configured as described above, the configuration of the first exterior body 11 and the second exterior body 12 will be described in detail based on FIGS. 4 and 6 and the like. In addition, although mentioned later for details, the 1st exterior body 11 is equipped with the 1st protrusion 114 and the 3rd protrusion 115, and the 2nd exterior body 12 is equipped with the 2nd protrusion 127, the 4th. A projection 128 is provided. When the second exterior body 12 is attached to the first exterior body 11, the first protrusion 114 and the second protrusion 127 are engaged, and the third protrusion 115 and the fourth protrusion 128 are in contact with each other. It will be in contact.

  First, the first exterior body 11 will be described.

  FIG. 4 is a top view illustrating a schematic configuration of the first exterior body 11 according to the embodiment.

  As shown in FIG. 4, the first exterior body 11 includes a bottom plate 111 having a rectangular shape in plan view, and a first opening that is erected from the periphery of the bottom plate 111 over the entire periphery of the bottom plate 111 and is opened upward. 112 and a first peripheral edge portion 113. That is, the first peripheral edge 113 is the outer peripheral wall of the first exterior body 11.

  On the outer surface in the vicinity of the upper portion of the first peripheral edge 113, first protrusions 114 and third protrusions 115 protruding outward are arranged alternately in the horizontal direction with no gap therebetween. Specifically, the first protrusion 114 and the third protrusion 115 are arranged at the same height position on the outer surface of the first peripheral edge 113. Two first protrusions 114 are provided at predetermined intervals with respect to each of the pair of long side surfaces of the first peripheral edge portion 113. The third protrusion 115 is provided on the outer surface of the first peripheral edge 113 and is continuously provided in a region where the first protrusion 114 is not provided.

  Next, the second exterior body 12 will be described.

  As shown in FIGS. 1 and 2, the second exterior body 12 is a lid that closes the opening of the first exterior body 11. The second exterior body 12 is formed with a hollow housing protrusion 80 that protrudes upward in a substantially T shape when viewed from above, and a circuit board (not shown) or a relay (not shown) is formed in the internal space of the housing protrusion 80. Electrical equipment such as an illustration (not shown) and wiring (not shown) connected to these are accommodated.

  Here, the circuit board acquires, monitors, and controls various information such as the charging state and discharging state of the storage element 100, the voltage value, the current value, and the temperature, and controls the on / off of the relay. Or a control circuit for communicating with other devices.

Further, on the inner surface side of the second exterior body 12, the positive external terminal 13 and the bus bar 41 are connected, and the negative external terminal 14 and the bus bar 42 are connected. The power storage unit 20 is electrically connected to the positive external terminal 13 and the negative external terminal 14 via the bus bars 41 and 42.
The upper surface of the housing protrusion 80 is connected to a first exposure port 81 for exposing a connection portion between the bus bar 41 connected to the positive external terminal 13 and the bus bar 200 of the power storage unit 20, and the negative external terminal 14. A second exposure port 82 is provided for exposing a connection portion between the bus bar 42 and the bus bar 200 of the power storage unit 20. The first exposure port 81 and the second exposure port 82 are blocked by blocking members 83 and 84 after the connection portion is connected. The closing members 83 and 84 are joined to the housing projection 80 by an adhesive, and the first exposure port 81 and the second exposure port 82 are sealed after assembly.

  FIG. 5 is a cross-sectional view showing an assembled state of the first exposure port 81 and the closing member 83 according to the embodiment. Specifically, FIG. 5 is a cross-sectional view of a cut surface including a VV line in FIG. Since the assembled state of the second exposure port 82 and the closing member 84 is substantially the same as the engaged state of the first exposure port 81 and the closing member 83, the description thereof is omitted.

  As shown in FIG. 5, the housing protrusion 80 is provided with a peripheral wall 85 that forms a first exposure port 81. On the inner peripheral surface of the peripheral wall 85, a plurality of engaging claws 811 are formed at predetermined intervals in the circumferential direction. The engaging claw 811 protrudes inward of the first exposure port 81 and has an inclined surface that inclines inwardly as its upper surface goes downward. The lower surface of the engaging claw 811 is a horizontal plane. In addition, an outer peripheral groove 812 that extends along the periphery of the first exposure port 81 is formed on the housing projection 80 outside the peripheral wall 85.

  The closing member 83 includes a plate portion 831 formed in a shape for closing the first exposure port 81, a wall portion 832 hanging from the periphery of the plate portion 831 over the entire periphery of the plate portion 831, and a plate portion 831. A protruding piece 833 that is inward of the wall portion 832 and extends downward from a position corresponding to the engaging claw 811 is provided.

  The protrusion 833 is formed with an engagement hole 834 that engages with the engagement claw 811. In a state where the engaging claw 811 is engaged with the engaging hole 834, the lower surface of the engaging claw 811 overlaps and abuts against the lower surface of the engaging hole 834 when the closing member 83 attempts to float upward. Thereby, the upward movement (floating) of the closing member 83 is restricted.

  On the other hand, the lower surface 8321 of the wall portion 832 is in contact with the bottom surface 8121 of the outer peripheral groove 812. In this state, the upper end surface 851 of the peripheral wall 85 is separated from the bottom surface 8311 of the plate portion 831 to form a gap 86. The gap 86 is an adhesion region, and an adhesive 87 for adhering the upper end surface 851 of the peripheral wall 85 to the bottom surface 8311 of the plate portion 831 is disposed.

  For example, when attaching the closing member 83 to the first exposure port 81, the adhesive 87 is first applied between the wall portion 832 and the protruding piece 833 of the closing member 83. Thereafter, the closing member 83 is pushed into the first exposure port 81. At this time, the lower end portion of the projecting piece 833 slides on the upper surface of the engaging claw 811, and the entire projecting piece 833 is bent inwardly, overcoming the engaging claw 811 and finally into the engaging hole 834. On the other hand, the engaging claw 811 is engaged. On the other hand, since the adhesive 87 is applied between the upper end surface 851 of the peripheral wall 85 and the bottom surface 8311 of the plate portion 831, the peripheral wall 85 and the plate portion 831 can be firmly bonded.

  FIG. 6 is a bottom view showing a schematic configuration of the second exterior body 12 according to the embodiment.

  As shown in FIG. 6, the second exterior body 12 includes a top plate 121 having a rectangular shape in plan view and a second top body 121 that hangs down from the periphery of the top plate 121 over the entire circumference of the top plate 121 and opens downward. And a second peripheral edge 123 that forms two openings 122. That is, the second peripheral edge 123 is the outer peripheral wall of the second exterior body 12. In addition, an inner peripheral wall 124 formed over the entire periphery of the top plate 121 is formed inside the second peripheral edge 123 of the top plate 121. The second peripheral edge 123 and the inner peripheral wall 124 are double wall bodies. The upper end portion of the first peripheral portion 113 of the first exterior body 11 is accommodated in the annular region in plan view between the second peripheral portion 123 and the inner peripheral wall 124, and the upper end portion is bonded. For this reason, an annular region in plan view between the second peripheral edge 123 and the inner peripheral wall 124 is defined as an adhesive region 125. The adhesion region 125 is a region where the adhesive 50 (see FIGS. 7 and 8) is disposed when the first exterior body 11 and the second exterior body 12 are adhered. That is, the side surface of the inner peripheral wall 124 on the bonding region 125 side and the side surface of the second peripheral edge 123 on the bonding region 125 side face each other.

  On the side surface of the inner peripheral wall 124 on the bonding region 125 side, a plurality of guide portions 126 that guide the upper end portion of the first exterior body 11 to the bonding position are arranged at predetermined intervals in the circumferential direction.

  A plurality of second protrusions 127 and a plurality of fourth protrusions 128 are provided on the side surface of the second peripheral edge 123 on the bonding region 125 side. Each of the plurality of second protrusions 127 is disposed so as to correspond to each of the plurality of first protrusions 114 when the second exterior body 12 is attached to the first exterior body 11. The plurality of fourth protrusions 128 are spaced apart in the circumferential direction so as to correspond to the third protrusions 115 of the first exterior body 11 when the second exterior body 12 is attached to the first exterior body 11. Are arranged.

  Next, the engagement state between the first protrusion 114 and the second protrusion 127 when the second exterior body 12 is attached to the first exterior body 11 will be described.

  FIG. 7 is a cross-sectional view showing an engaged state between the first protrusion 114 and the second protrusion 127 according to the embodiment. Specifically, FIG. 7 is a cross-sectional view corresponding to the position of line VII-VII in FIG.

  As shown in FIG. 7, the upper part of the first peripheral edge 113 is accommodated in the adhesion region 125 of the second exterior body 12. And the upper surface 1141 of the 1st protrusion 114 becomes an inclined surface which inclines outward as it goes below. The upper surface 1141 of the first protrusion 114 and the upper end surface 1131 of the first peripheral edge 113 are continuous. Further, the lower surface 1142 of the first protrusion 114 is formed in a substantially horizontal surface whose outer side is slightly inclined upward.

  The second peripheral edge 123 includes a skirt portion 129 as an extension extending downward from the first protrusion 114. A second protrusion 127 is formed on the side surface (inner surface) of the skirt portion 129 on the bonding region 125 side so as to face the lower surface 1142 of the first protrusion 114. The upper surface 1271 of the second protrusion 127 is a horizontal plane and faces the lower surface 1142 of the first protrusion 114. The lower surface 1272 of the second protrusion 127 is an inclined surface that is inclined outward as it goes downward.

  Thus, since the lower surface 1272 of the second protrusion 127 is an inclined surface that is inclined outward as it goes downward, the second exterior body 12 is attached when the second exterior body 12 is attached to the first exterior body 11. The lower surface 1272 of the second protrusion 127 slides on the first protrusion 114. Thereby, the 2nd peripheral part 123 of the 2nd exterior body 12 spreads outward. Since the second protrusion 127 gets over the first protrusion 114 by this spreading, the second protrusion 127 can be smoothly arranged below the first protrusion 114.

  Furthermore, since the upper surface 1141 of the first protrusion 114 is an inclined surface that is inclined outward as it goes downward as described above, when the second exterior body 12 is attached to the first exterior body 11, the second protrusion The lower surface 1272 slides on the upper surface 1141 of the first protrusion 114. Thus, the 1st protrusion 114 and the 2nd protrusion 127 slide by surface contact, and the 2nd protrusion 127 can be arrange | positioned under the 1st protrusion 114 more easily.

  Even if the upper surface 1141 of the first protrusion 114 is not an inclined surface, at least the lower surface 1272 of the second protrusion 127 may be an inclined surface. Further, the lower surface of the second protrusion 127 may be a horizontal surface, and the upper surface 1141 of the first protrusion 114 may be an inclined surface.

  Next, a contact state between the third protrusion 115 and the fourth protrusion 128 when the second exterior body 12 is attached to the first exterior body 11 will be described.

  FIG. 8 is a cross-sectional view showing a contact state between the third protrusion 115 and the fourth protrusion 128 according to the embodiment. Specifically, FIG. 8 is a cross-sectional view corresponding to the position of line VIII-VIII in FIG.

  As shown in FIG. 8, the upper part of the first peripheral edge 113 is accommodated in the adhesion region 125 of the second exterior body 12. The third protrusion 115 is disposed at a predetermined interval downward from the upper end surface 1131 of the first peripheral edge 113. The upper surface 1151 and the lower surface 1152 of the third protrusion 115 are horizontal surfaces. The lower surface 1152 of the third protrusion 115 is flush with the lower surface 1142 of the first protrusion 114.

  The skirt portion 129 of the second peripheral edge portion 123 extends below the third protrusion 115. Further, a fourth protrusion 128 that abuts on the upper surface 1151 of the third protrusion 115 is formed on the side surface (inner surface) of the second peripheral edge portion 123 on the bonding region 125 side. The fourth protrusion 128 extends continuously downward from the top plate 121. The lower surface 1282 of the fourth protrusion 128 is a horizontal surface and is in contact with and overlaps the upper surface 1151 of the third protrusion 115. In this way, since the fourth protrusion 128 is in contact with the third protrusion 115, the downward movement of the second exterior body 12 is restricted.

  In a state where the third protrusion 115 is in contact with the fourth protrusion 128, an adhesive is provided between the lower surface 1211 of the top plate 121 of the second exterior body 12 and the upper end surface 1131 of the first peripheral edge 113. A gap 51 for accommodating 50 is formed. The gap 51 is provided over the entire circumference of the bonding region 125 (see FIGS. 7 and 8). When such a gap 51 is formed, the adhesive 50 can be held over the entire circumference of the bonding region 125. Further, even if the adhesive 50 hangs from the upper end surface 1131 of the first peripheral edge 113, the first protrusion 114 and the third protrusion 115 block further sag. Further, since the skirt portion 129 of the second peripheral edge portion 123 is positioned below the first protrusion 114 and the third protrusion 115, the adhesive 50 attached to the first protrusion 114 and the third protrusion 115 is removed from the skirt portion. 129 can be hidden. In addition, although the adhesive agent 50 may hang down from the inner surface of the 1st peripheral part 113, since the internal surface of the 1st peripheral part 113 is not exposed outside originally, it inhibits the external appearance property of the electrical storage apparatus 1. There is no.

  Further, as shown in FIG. 8, an inclined surface 1261 that is inclined inward as it goes downward is formed on the side surface of the guide portion 126 on the bonding region 125 side. When attaching the second exterior body 12 to the first exterior body 11, the upper portion of the first peripheral edge portion 113 slides on the inclined surface 1261 and is guided into the adhesion region 125. That is, the inclined surface 1261 is a guide surface that guides the upper portion of the first peripheral edge portion 113 to the bonding position.

  Next, a method for manufacturing the power storage device 1 will be described.

  FIG. 9 is a flowchart illustrating a method for manufacturing power storage device 1 according to the embodiment.

  As shown in FIG. 9, in the housing step, the worker houses the power storage unit 20, the holding member 30, the bus bars 41, 42, etc. in the first opening 112 of the first exterior body 11 (S <b> 101). Thereby, the electrical storage element 100 is accommodated in the first exterior body 11. In addition, the worker connects the electric devices such as the bus bars 41 and 42, the circuit board and the relay, and the power storage element 100 in the power storage unit 20 to the inner surface side of the second exterior body 12. (Not shown).

  Next, in the application process, the operator applies an adhesive to the adhesive region 125 of the second exterior body 12 and the wall portion 832 and the protruding piece 833 of the closing member 83 (S102).

  In the bonding step, the operator attaches the second exterior body 12 to the first exterior body 11 in which the power storage element 100 is accommodated, and the upper end surface 1131 of the first peripheral edge 113 of the first exterior body 11. And the 2nd exterior body 12 is adhere | attached with the adhesive agent 50 (S103). At the time of attachment, since the first peripheral edge 113 of the first exterior body 11 slides on the inclined surface 1261 of the guide 126 and is guided to the bonding position, the upper end surface 1131 of the first peripheral 113 is bonded. The agent 50 will be touched.

  Thereafter, the bus bars 41, 42 and the bus bar 200 are joined at the first exposure port 81 and the second exposure port 82, and then the first exposure port 81 and the second exposure port 82 are closed with respect to the second exterior body 12. Thus, the assembly of the power storage device 1 is completed by attaching and bonding the closing members 83 and 84.

  As described above, according to the power storage device 1 according to the embodiment of the present invention, the outer peripheral surface of the first peripheral edge 113 facing the second peripheral edge 123 and the first peripheral edge 113 of the second peripheral edge 123 are arranged. Since at least one of the opposed inner side surfaces is formed with protrusions (first protrusion 114, second protrusion 127, and third protrusion 115) protruding toward the other, the adhesive 50 is applied to the first peripheral edge 113. Even if it overflows from the upper end surface, it is possible to suppress the drooping downward from the protrusion.

  Moreover, since the 2nd peripheral part 123 is arrange | positioned outward from the 1st peripheral part 113, the adhesive agent 50 above a protrusion can be covered, and the external appearance property of electrical storage apparatus 1 itself can be improved. .

  In addition, since the first protrusion 114 is formed on the outer side surface of the first peripheral portion 113 of the first exterior body 11, even if the adhesive 50 overflows from the upper end surface 1131 of the first peripheral portion 113, It is possible to suppress the drooping downward from the one protrusion 114. Further, the skirt portion 129 extends downward from the first protrusion 114, and the skirt portion 129 is formed with a second protrusion 127 that faces the lower surface of the first protrusion 114, so that it adheres to the first protrusion 114. The adhered adhesive 50 can be hidden by the skirt portion 129. Therefore, the adhesive 50 is difficult to be exposed from the appearance of the power storage device 1, and the appearance of the power storage device 1 itself can be improved.

  Here, in the second exterior body 12, wiring, circuit boards, bus bars 41 and 42, etc. are mounted inside, but if water enters, these may cause problems such as corrosion and insulation failure. There is. However, when the second protrusion 127 facing the lower surface 1142 of the first protrusion 114 is provided, even if the second exterior body 12 tries to float from the first exterior body 11, the second protrusion 127 becomes the first protrusion 114. It abuts and floats are suppressed. For this reason, high waterproofness can be ensured after adhesion. Thereby, generation | occurrence | production of the malfunction resulting from the water in the wiring in the 2nd exterior body 12, a board | substrate, the bus bars 41 and 42, etc. can be suppressed.

  In addition, since the third protrusion 115 is formed on the outer side surface of the first peripheral portion 113 of the first exterior body 11, even if the adhesive 50 overflows from the upper end surface 1131 of the first peripheral portion 113, The drooping downward from the three protrusions 115 can be suppressed. In the second exterior body 12, since the skirt portion 129 extends downward from the fourth protrusion 128 that contacts the upper surface 1151 of the third protrusion 115, the third protrusion 115 is covered with the skirt portion 129. Thereby, the adhesive 50 attached to the third protrusion 115 can be hidden by the skirt portion 129. Therefore, the adhesive 50 is difficult to be exposed from the appearance of the power storage device 1, and the appearance of the power storage device 1 itself can be improved.

  Further, since the fourth protrusion 128 abuts on the upper surface 1151 of the third protrusion 115 to restrict the downward movement of the second exterior body 12, the position of the second exterior body 12 with respect to the first exterior body 11 is adjusted. Can be assembled smoothly.

  Further, a gap 51 for accommodating the adhesive 50 is positively formed between the second exterior body 12 whose movement downward is restricted by the fourth protrusion 128 and the upper end surface 1131 of the first peripheral edge 113. Therefore, the adhesive 50 can be held in the gap 51. Here, in a form in which no gap is formed when the second exterior body is covered with the first exterior body without applying the adhesive, even if the adhesive is applied, the second exterior body and the upper end surface of the first peripheral portion A little adhesive remains between the two. In this way, when the gap 51 is positively formed, more adhesive 50 is held by the gap 51, so that the adhesive strength between the first exterior body 11 and the second exterior body 12 is stabilized. be able to.

  Further, since the first protrusion 114 and the third protrusion 115 are arranged side by side in the horizontal direction, the dripping of the adhesive 50 can be reliably suppressed by the first protrusion 114 and the third protrusion 115. Moreover, since the 1st protrusion 114 and the 3rd protrusion 115 are located in a line with the horizontal direction, it can suppress that the 1st exterior body 11 enlarges to an up-down direction.

  In addition, since the lower surface 1272 of the second protrusion 127 of the second exterior body 12 is an inclined surface that inclines outward as it goes downward, when attaching the second exterior body 12 to the first exterior body 11, The inclined surface of the second protrusion 127 of the two exterior body 12 slides on the first protrusion 114. Thereby, the 2nd peripheral part 123 of the 2nd exterior body 12 spreads outward. Since the second protrusion 127 gets over the first protrusion 114 by this spreading, the second protrusion 127 can be smoothly arranged below the first protrusion 114.

  In addition, since the upper surface 1141 of the first protrusion 114 is an inclined surface that inclines outward as it goes downward, when the second exterior body 12 is attached to the first exterior body 11, The two protrusions 127 slide on an inclined surface provided on the first protrusion 114. Thereby, the second protrusion 127 can be easily disposed below the first protrusion 114.

  Moreover, since the guide part 126 guides the 1st peripheral part 113 of the 1st exterior body 11 to an adhesion | attachment position, when attaching the 2nd exterior body 12 to the 1st exterior body 11, the 1st peripheral edge of the 1st exterior body 11 The portion 113 can be smoothly guided to the bonding position.

  Here, the nonaqueous electrolyte power storage element generally has more internal members built in the power storage device than the aqueous electrolyte power storage element. That is, as described above, when a non-aqueous electrolyte power storage element is used, the number of members affected by water immersion increases, but the power storage device 1 has a configuration that improves waterproofness, and thus the above-described effects are achieved. It can play suitably.

  And it is preferable to join the 1st exterior body 11 and the 2nd exterior body 12 with the adhesive agent 50, since it does not have a thermal influence inside at the time of adhesion | attachment.

  The power storage device according to the embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. That is, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. 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.

  In the following, modifications will be described in detail, but the same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

  For example, in the above embodiment, the case where the first protrusions 114 and the third protrusions 115 are alternately arranged in the horizontal direction with respect to the first exterior body 11 has been described as an example. However, only the first protrusion 114 or the third protrusion 115 may be provided continuously over the entire circumference of the first exterior body 11.

[Modification 1]
FIG. 10 is a top view illustrating a schematic configuration of the first exterior body 11A according to the first modification. Specifically, FIG. 10 corresponds to FIG.

  As shown in FIG. 10, the 1st protrusion 114 or the 3rd protrusion 115 is continuously formed in the outer surface of the 1st peripheral part 113 of 11 A of 1st exterior bodies over the perimeter. Thus, since the 1st protrusion 114 or the 3rd protrusion 115 is provided over the perimeter of the 1st peripheral part 113, even if it is one protrusion (1st protrusion 114 or the 3rd protrusion 115), The dripping of the adhesive 50 can be reliably suppressed.

  For example, when the first protrusion 114 is provided over the entire circumference of the first peripheral edge portion 113 and the third protrusion 115 is not provided, the second protrusion 127 may be entirely or partially of the first protrusion 114. It suffices if it is provided so as to oppose. In the place where the second protrusion 127 exists, the first protrusion 114 and the second protrusion 127 have the form shown in FIG.

  In addition, when the third protrusion 115 is provided over the entire circumference of the first peripheral edge 113 and the first protrusion 114 is not provided, the fourth protrusion 128 may be the whole or a part of the third protrusion 115. It suffices if it is provided so as to oppose. In the place where the fourth protrusion 128 exists, the third protrusion 115 and the fourth protrusion 128 have the form shown in FIG.

[Modification 2]
FIG. 11 is a cross-sectional view illustrating an engagement state between the third protrusion 115 and the second protrusion 127 according to the second modification.

  As shown in FIG. 11, the second protrusion 127 may be provided at a position facing the third protrusion 115. Specifically, the upper surface 1271 of the second protrusion 127 overlaps and contacts the lower surface 1152 of the third protrusion 115. The second protrusion 127 may abut against the entire third protrusion 115 or may partially abut. Further, when the third protrusion 115 is formed over the entire circumference of the first exterior body 11A, the second protrusion 127 and the fourth protrusion 128 are in contact with the third protrusion 115 at different positions. It may be provided. In addition, since the skirt portion 129 of the second peripheral edge portion 123 is positioned below the third protrusion 115, the adhesive 50 attached to the third protrusion 115 can be hidden by the skirt portion 129.

[Modification 3]
FIG. 12 is a cross-sectional view illustrating a schematic configuration of the third protrusion 115 according to the third modification.

  As shown in FIG. 12, the first exterior body 11A has a third protrusion 115 formed over the entire circumference, but the second exterior body 12B has protrusions (a second protrusion 127 and a fourth protrusion 128). ) May not be provided. Even in this case, dripping of the adhesive 50 can be suppressed on the upper surface 1151 of the third protrusion 115. Moreover, it is preferable that the 3rd protrusion 115 is contact | abutting to the inner surface of the 2nd peripheral part 123 of the 2nd exterior body 12B. Thereby, it is possible to prevent the second peripheral edge portion 123 from overflowing the adhesive 50 from the third protrusion 115. In addition, since the skirt portion 129 of the second peripheral edge portion 123 is positioned below the third protrusion 115, the adhesive 50 attached to the third protrusion 115 can be hidden by the skirt portion 129.

  In place of the third protrusion 115, the first protrusion 114 may be formed over the entire circumference of the first exterior body 11A.

[Modification 4]
FIG. 13 is a cross-sectional view illustrating a schematic configuration of the second protrusion 127 according to the fourth modification.

  As shown in FIG. 13, the second exterior body 12A is formed with second protrusions 127 over the entire circumference, but the first exterior body 11B has protrusions (first protrusions 114 and third protrusions 115). ) May not be provided. Moreover, the 2nd protrusion 127 is contact | abutting on the outer surface of the 1st peripheral part 113 of the 1st exterior body 11B. Even in this case, dripping of the adhesive 50 can be suppressed by the upper surface 1271 of the second protrusion 127.

  In addition, you may combine each component with which the said embodiment and modification are provided arbitrarily.

  The present invention can be applied to a power storage device including a power storage element and an exterior body.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Exterior body 11, 11A, 11B First exterior body 12, 12A, 12B Second exterior body 13 Positive electrode external terminal 14 Negative electrode external terminal 20 Power storage unit 30 Holding members 41, 42, 200 Bus bars 50, 87 Adhesive 51 , 86 Gap 80 Housing projection 81 First exposure port 82 Second exposure port 83, 84 Closing member 85 Perimeter wall 100 Power storage device 110 Container 111 Bottom plate 112 First opening 113 First peripheral portion 114 First projection (projection)
115 Third protrusion (protrusion)
120 Positive electrode terminal 121 Top plate 122 Second opening 123 Second peripheral edge portion 124 Inner peripheral wall 125 Adhesive region 126 Guide portion 127 Second protrusion (protrusion)
128 Fourth protrusion (protrusion)
129 Skirt portion 130 Negative electrode terminal 300 Spacer 310 First spacer 320 Second spacer 330 Third spacer 400 Nipping member 500 Restraining member 600 Bus bar frame 700 Heat shield plate 811 Engaging claw 812 Outer groove 831 Plate portion 832 Wall portion 833 Projection piece 834 Engagement hole 851, 1131 Upper end surface 1141, 1151, 1271 Upper surface 1142, 1152, 1211, 1272, 1282, 8321 Lower surface 1261 Inclined surface 8121, 8311 Bottom surface

Claims (11)

A power storage device comprising a power storage element and an exterior body,
The exterior body includes a first exterior body and a second exterior body disposed above the first exterior body,
The first exterior body has a first peripheral edge portion forming a first opening opened upward,
The second exterior body has a second opening that opens downward, and has a second peripheral edge that faces the first peripheral edge from the outside,
The upper end surface of the first peripheral edge and the second exterior body are bonded with an adhesive,
A protrusion projecting toward the other is formed on at least one of the outer side surface of the first peripheral edge portion that faces the second peripheral edge portion and the inner side surface of the second peripheral edge portion that faces the first peripheral edge portion. Power storage device. A first protrusion that is the protrusion is formed on the outer surface of the first peripheral edge,
The second peripheral edge portion includes a skirt portion extending downward from the first protrusion,
The power storage device according to claim 1, wherein a second protrusion that faces the lower surface of the first protrusion is formed on the inner side surface of the skirt portion as the protrusion. A third protrusion, which is the protrusion, is formed on the outer surface of the first peripheral edge,
On the inner side surface of the second peripheral edge portion, a fourth protrusion that is in contact with the upper surface of the third protrusion is formed as the protrusion.
The power storage device according to claim 1, wherein the second peripheral edge portion includes a skirt portion that extends downward from the third protrusion. A gap for accommodating the adhesive between the second exterior body in a state in which the third protrusion is in contact with the fourth protrusion and the upper end surface of the first peripheral edge of the first exterior body. The power storage device according to claim 3. The first protrusion and a third protrusion that is the protrusion different from the first protrusion are arranged side by side in the horizontal direction on the outer side surface of the first peripheral edge.
The power storage device according to claim 2, wherein a fourth protrusion that abuts on an upper surface of the third protrusion is disposed on the inner side surface of the second peripheral edge. The said 3rd protrusion and the 1st protrusion which is the said protrusion different from the said 3rd protrusion are arrange | positioned along with the horizontal direction in the said outer surface of a said 1st peripheral part. Power storage device. The power storage device according to claim 2, wherein the lower surface of the second protrusion is an inclined surface that is inclined outward as it goes downward. The power storage device according to any one of claims 2, 5, 6, and 7, wherein an upper surface of the first protrusion is an inclined surface that is inclined outward as it goes downward. The guide part which guides the 1st peripheral part of a said 1st exterior body to an adhesion | attachment position is provided inside the said 2nd peripheral part in said 2nd exterior body. The power storage device according to item. The power storage device according to claim 1, wherein the power storage element is a non-aqueous electrolyte power storage element. A method of manufacturing a power storage device including a power storage element and an exterior body,
The exterior body includes a first exterior body and a second exterior body disposed above the first exterior body,
The first exterior body has a first peripheral edge portion forming a first opening opened upward,
The second exterior body has a second opening that opens downward, and has a second peripheral edge that faces the first peripheral edge from the outside,
A protrusion projecting toward the other is formed on at least one of the outer side surface of the first peripheral edge portion that faces the second peripheral edge portion and the inner side surface of the second peripheral edge portion that faces the first peripheral edge portion. Has been
The manufacturing method includes:
Accommodating the electricity storage element in the first opening of the first exterior body;
Applying an adhesive to the second exterior body;
The second exterior body is attached to the first exterior body in which the power storage element is accommodated, and the upper end surface of the first peripheral portion of the first exterior body and the second exterior body are bonded together. The manufacturing method of an electrical storage apparatus including the process of adhere | attaching with an agent.

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