JP6556986B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including a power storage element and a spacer provided on a side of the power storage element.

  2. Description of the Related Art Conventionally, in a power storage device (power supply device) including a plurality of power storage elements (battery cells), a configuration is known in which an insulating member (separator) for insulation between the plurality of power storage elements is provided (patent) Reference 1). In Patent Document 1, a plurality of power storage elements and a plurality of insulating members are constrained by a constraining member (bind bar) in the arrangement direction thereof.

JP 2013-97888 A

  However, in the conventional power storage device, when vibration or impact is applied, any of the plurality of power storage elements and the plurality of insulating members may be shifted in a direction crossing the arrangement direction. That is, in the above power storage device, it is difficult to suppress the power storage element from moving in a direction that intersects the direction of the restraining force applied by the restraining member.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a power storage device that can suppress the power storage element from moving in a direction crossing the direction of the binding force applied by the binding member. To do.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention includes a power storage element, a second power supply element that is disposed on a first direction side of the power storage element and intersects the first direction with respect to the power storage element. A restraining member for imparting a restraining force in a direction, an insulating member disposed on the first direction side or the second direction side of the power storage element, and a filling disposed between the insulating member and the restraining member A member.

  According to this, since the filling member is provided between the insulating member and the restraining member provided on the side of the power storage element, even if the power storage device is subjected to vibration or impact, the power storage element becomes the restraining member. It can suppress moving toward. That is, with this configuration, it is possible to suppress the storage element from moving in a direction that intersects the direction of the restraining force applied by the restraining member.

  The insulating member may be disposed on the second direction side of the power storage element, and the restraining member may apply a restraining force in the second direction to the power storage element and the insulating member.

  According to this, since the filling member is provided between the insulating member and the restraining member, it is possible to prevent the insulating member from moving toward the restraining member even if vibration or impact is applied to the power storage device. .

  The insulating member and the filling member may be integrally formed.

  For this reason, the strength between the insulating member and the filling member can be improved. For this reason, even if a vibration or impact is given to the power storage device, the filling member can be prevented from shifting from a predetermined position between the insulating member and the restraining member.

  The insulating member includes a first plate-like member disposed on the second direction side of the power storage element, and a wall portion disposed on the first direction side of the power storage element, and the filling member May be provided on the wall.

  For this reason, it is an area | region between an insulating member and a restraint member, Comprising: The area | region where a filling member is arrange | positioned can be expanded. Thereby, it can suppress more reliably that an insulating member shifts toward a restraint member.

  The filling member may be provided on an extension line of the first plate member.

  For this reason, when a force directed from the restraining member toward the opposite side in the second direction is applied, the force can be efficiently transmitted to the first plate member. Thereby, it can suppress more reliably that an insulating member shifts toward a restraint member.

  Further, the restraining member may be fixed to the insulating member so as to apply a biasing force to the filling member.

  According to this, since the insulating member is pressed by the restraining member via the filling member, even if vibration or impact is applied to the power storage device, the insulating member is more reliably suppressed from moving toward the restraining member. it can.

  And a pair of clamping members that sandwich the power storage element and the insulating member in the second direction and that apply the restraining force from the restraining member between the power storage element and the insulating member. Each of the pair of clamping members is provided on the first direction side of at least one of the electricity storage element and the insulating member, and a second plate-like member provided on the second direction side of the electricity storage element, and A connecting portion to which the restraining member is connected, and the filling member may be provided between the pair of clamping members.

  According to this, even if a sandwiching member having a configuration in which a connection portion of the sandwiching member is provided between the restraining member and the insulating member or the storage element, the filling member is interposed between the restraining member and the insulating member. Since it is provided, the gap between the constraining member and the insulating member or the power storage element generated by providing the connection portion can be filled with the filling member. For this reason, even if a vibration or impact is applied to the power storage device, it is possible to more reliably suppress the insulating member from being displaced toward the restraining member.

  In addition, at least one of the pair of clamping members may further include a reinforcing portion provided across the second plate-like member and the connection portion.

  According to this, the reinforcement part which protrudes toward the inner side of a 2nd plate-shaped member and a connection part is provided, and the clamping member of the structure which a clearance gap produces between a restraint member and an insulation member is employ | adopted. However, since the filling member is provided between the restraining member and the insulating member, the gap can be filled with the filling member. For this reason, it can suppress more reliably that an insulating member shifts toward a restraint member, improving the intensity | strength of a clamping member.

  Further, the connection portion is formed by being bent from the second plate-shaped member toward the power storage element side, and the reinforcing portion is formed from the connection portion of the second plate-shaped member and the connection portion. You may protrude toward at least one of an insulating member and the said restraint member.

  According to this, since the reinforcing portion is formed between the connecting portion formed by bending and the second plate-like member, the connecting portion and the second portion against bending in the bent direction or the opposite direction are provided. The rigidity between the two plate-like members can be improved. Thereby, the intensity | strength of the bent part between a connection part and a 2nd plate-shaped member can be improved.

  The power storage device includes a plurality of the power storage elements arranged in the second direction, a plurality of the insulating members provided between the plurality of power storage elements, and the plurality of insulating members and the restraining members. A plurality of filling members provided, and the plurality of filling members may be provided side by side in a direction in which the restraining member extends in a state of being separated from each other.

  According to this, each of the plurality of filling members is discretely and independently provided between the restraining member and the plurality of insulating members. For this reason, deformation of one filling member among a plurality of filling members does not affect other filling members. Thus, each of the plurality of filling members can easily come into contact with the restraining member and the insulating member. For this reason, it can suppress more reliably that a some insulating member shifts toward a restraint member.

  The filling member may have a long shape extending in a third direction intersecting the first direction and the second direction.

  According to this, since the filling member has an elongated shape in a direction intersecting with the restraining member extending in the second direction, even if the insulating member is displaced from the restraining member in the third direction, the restraining member and the insulating member Can be located between. Thereby, even if a vibration or impact is applied to the power storage device, it is possible to more reliably suppress the insulating member from being displaced toward the restraining member.

  The filling member may further have an elongated shape extending in a direction intersecting with the third direction.

  For this reason, the intensity | strength of a filling member can be improved.

  Note that the present invention can be realized not only as such a power storage device but also as an insulating member included in the power storage device.

  According to the power storage device of the present invention, it is possible to suppress the power storage element from moving in a direction that intersects the direction of the restraining force applied by the restraining member.

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 perspective view which shows the structure of the electrical storage unit which concerns on embodiment of this invention. It is a perspective view which shows the structure of the electrical storage unit which concerns on embodiment of this invention. It is a perspective view which shows the structure of the electrical storage element which concerns on embodiment of this invention. It is a perspective view which shows the structure of the spacer which concerns on embodiment of this invention. It is a perspective view which shows the structure of the spacer which concerns on embodiment of this invention. It is a top view which shows the structure of the spacer which concerns on embodiment of this invention. It is a perspective view which shows the structure of the clamping member which concerns on embodiment of this invention. It is a figure which shows the AA cross section of the component which isolate | separated the bus-bar frame and the bus-bar from the electrical storage unit of FIG. It is a figure which shows the BB cross section of the component which isolate | separated the bus-bar frame and the bus-bar from the electrical storage unit of FIG.

  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. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements 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 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.

  As shown in these drawings, the power storage device 1 includes an exterior body 10 including a first exterior body 11 and a second exterior body 12, and an electrical storage unit 30 and an electric device 40 accommodated inside the exterior body 10. ing.

  The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1 and is disposed outside the power storage unit 30 and the electric device 40. That is, the exterior body 10 arranges the power storage unit 30 and the electric device 40 at predetermined positions, and protects the power storage unit 30 and the electric device 40 from an impact or the like. Moreover, the exterior body 10 is comprised, for example with insulating resin, such as a polycarbonate and a polypropylene (PP), and avoids that the electrical storage unit 30 and the electric equipment 40 contact an external metal member etc.

  Here, the exterior body 10 includes a first exterior body 11 constituting a lid body of the exterior body 10 and a second exterior body 12 constituting a main body of the exterior body 10. The first exterior body 11 is a flat rectangular cover member that closes the opening of the second exterior body 12, and is provided with a positive external terminal 21 and a negative external terminal 22. The power storage device 1 charges electricity from the outside via the positive electrode external terminal 21 and the negative electrode external terminal 22, and discharges electricity to the outside. The second exterior body 12 is a bottomed rectangular cylindrical housing in which an opening is formed, and houses the power storage unit 30 and the electric device 40.

  In addition, 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.

  The power storage unit 30 includes a plurality of power storage elements, and is connected to the positive external terminal 21 and the negative external terminal 22 provided on the first exterior body 11. In the present embodiment, as shown in FIG. 2, the power storage unit 30 is stacked in the Z-axis direction and arranged in the second exterior body 12 with a plurality of power storage elements placed horizontally. The power storage unit 30 is accommodated inside the exterior body 10 by covering the first exterior body 11 from above. The detailed configuration of the power storage unit 30 will be described later.

  The electric device 40 is a rectangular device in which a circuit board, a relay, and the like are disposed inward, and is disposed on the side of the power storage unit 30 (X-axis direction plus side). In the present embodiment, as shown in FIG. 2, the electric device 40 is erected in the Z-axis direction with the circuit board placed vertically, and is disposed in the second exterior body 12. The electrical device 40 is accommodated inside the exterior body 10 by covering the first exterior body 11 from above.

  The circuit board provided in the electric device 40 is connected to the positive terminal or the negative terminal of each power storage element in the power storage unit 30 by wiring (lead wire). For example, the charge state or the discharge state (voltage) of the power storage element , Battery status such as temperature) is acquired, monitored, and controlled.

  Next, the configuration of the power storage unit 30 will be described in detail.

  3 and 4 are perspective views showing the configuration of the power storage unit 30 according to the embodiment of the present invention. Specifically, FIG. 3 is an exploded perspective view showing a configuration when the bus bar frame 500 and the bus bar 600 are separated from the power storage unit 30. FIG. 4 is an exploded perspective view showing each component when the components separating the bus bar frame 500 and the bus bar 600 from the power storage unit 30 are further disassembled.

  In these figures and the following figures, for convenience of explanation, the Y-axis direction is shown as the vertical direction, and there is a place where the Y-axis direction is described as the vertical direction. The Y-axis direction is not always the vertical direction.

  As shown in these drawings, the power storage unit 30 includes a plurality of power storage elements 100 (eight power storage elements 100 in the present embodiment), a plurality of spacers 200 (seven spacers 200 in the present embodiment), and A pair of clamping members 300, a plurality of restraining members 400 (four restraining members 410 to 440 in the present embodiment), a bus bar frame 500, and a plurality of bus bars 600 are provided.

  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 such as a lithium ion secondary battery. . The power storage element 100 has a flat rectangular shape and is disposed adjacent to the spacer 200. That is, each of the plurality of power storage elements 100 is alternately arranged with each of the plurality of spacers 200 and arranged in the Z-axis direction. In short, the spacer 200 is provided on the side of the power storage element 100.

  In the present embodiment, the power storage element 100 is disposed laterally inside the outer package 10 (see FIG. 2). However, in FIG. It has shown in the state arrange | positioned toward. 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. The detailed configuration of the power storage device 100 will be described later.

  The spacer 200 is disposed between two adjacent power storage elements 100 and has an insulating plate-like member formed of a resin or the like that insulates between the two power storage elements 100. That is, the spacer 200 is an insulating member. In the present embodiment, seven spacers 200 are arranged between the eight power storage elements 100. The spacer 200 is formed of an insulating resin such as polycarbonate or polypropylene (PP), but may be formed of any material as long as it is a member having an insulating property.

  Spacer 200 is formed so as to cover approximately half of the front side or back side of storage element 100 (substantially half when divided into two in the Z-axis direction). That is, a recess is formed on both the front side or the back side (both sides in the Z-axis direction) of the spacer 200, and approximately half of the power storage element 100 is inserted into the recess. With such a configuration, the two spacers 200 sandwiching the power storage element 100 cover most of the power storage element 100, so that the insulating property between the power storage element 100 and another conductive member is covered by the spacer 200. Can be improved. The detailed configuration of the spacer 200 will be described later.

  The sandwiching member 300 includes a pair of sandwiching members 310 and 320 that are flat plate-like members, and sandwiches and holds the plurality of power storage elements 100 from both sides in the arrangement direction (Z-axis direction) of the plurality of power storage elements 100.

  That is, the clamping member 310 is a flat plate member that is disposed on the positive side in the Z-axis direction with respect to the power storage element 100 a that is disposed on the most positive side in the Z-axis direction among the plurality of power storage elements 100. The sandwiching member 320 is a flat plate-like member disposed on the minus side in the Z-axis direction relative to the electricity storage element 100b disposed on the most minus side in the Z-axis direction among the plurality of power storage elements 100. The sandwiching member 310 and the sandwiching member 320 sandwich and hold the plurality of power storage elements 100 and the plurality of spacers 200 from both sides in the arrangement direction (Z-axis direction) of the plurality of power storage elements 100 and the plurality of spacers 200. .

  In addition, the sandwiching member 300 (the sandwiching members 310 and 320) is formed of a metal (conductive) member such as stainless steel or aluminum from the viewpoint of strength or the like. The insulating member is disposed to ensure insulation from the power storage element 100. Note that the clamping member 300 is not limited to a metal (conductive) member, and may be formed of, for example, an insulating member having high strength. Further, the sandwiching member 310 and the sandwiching member 320 may be formed of members of the same material, or may be formed of members of different materials.

  The restraining member 400 is a member that is attached to the sandwiching member 300 at both ends and restrains the plurality of power storage elements 100. That is, the restraining member 400 is disposed so as to straddle the plurality of power storage elements 100, and applies a restraining force in the arrangement direction (Z-axis direction) of the plurality of power storage elements to the plurality of power storage elements 100. The restraining member 400 is preferably formed of a metal member such as stainless steel or aluminum, for example, similarly to the clamping member 300, but may be formed of a member other than metal.

  Specifically, the restraining member 400 has one end attached to the holding member 310 and the other end attached to the holding member 320. Then, the restraining member 400 applies a restraining force in the arrangement direction of the plurality of power storage elements 100 and the plurality of spacers 200 to the plurality of power storage elements 100 and the plurality of spacers 200. Thereby, the clamping members 310 and 320 sandwich the plurality of power storage elements 100 and the plurality of spacers 200 in the Z-axis direction, and apply the restraining force from the restraining member 400 to the power storage elements 100 and the spacers 200.

  Here, the restraining member 400 includes restraining members 410 to 440. The restraining members 410 and 420 are disposed on both sides of the plurality of power storage elements 100 in the vertical direction (both sides in the Y-axis direction), and sandwich and restrain the plurality of power storage elements 100 from both sides. The restraining members 430 and 440 are arranged on both sides (both sides in the X-axis direction) of the plurality of power storage elements 100, and sandwich and restrain the plurality of power storage elements 100 from both sides.

  Specifically, the restraining member 410 and the restraining member 420 are a pair of long and flat members disposed on the plus side and the minus side in the Y-axis direction of the plurality of power storage elements 100. The restraining member 430 and the restraining member 440 are a pair of long and flat members disposed on the plus side and the minus side in the X-axis direction of the plurality of power storage elements 100. Each of the restraining member 410 and the restraining member 420 is a member formed by connecting two long and flat members arranged in the X-axis direction in the X-axis direction. In addition, each of the restraining member 430 and the restraining member 440 is formed of a single long and flat member, and is disposed at different positions in the Y-axis direction.

  The bus bar frame 500 is a member that can insulate the bus bar 600 from other members, protect various wirings disposed in the power storage device 1, and restrict the position of the bus bar 600. In particular, the bus bar frame 500 positions the bus bar 600 with respect to the plurality of power storage elements 100.

  Specifically, the bus bar frame 500 is placed above the plurality of power storage elements 100 (Y-axis direction plus side) and positioned with respect to the plurality of power storage elements 100. A bus bar 600 is placed on the bus bar frame 500. At this time, the protrusion of the bus bar frame 500 is inserted into the opening formed in the bus bar 600, whereby the bus bar 600 is positioned with respect to the bus bar frame 500. As a result, the bus bar 600 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 500 is formed of an insulating resin such as polycarbonate or polypropylene (PP), but may be formed of any material as long as it is an insulating member. The detailed configuration of the bus bar frame 500 and the detailed configuration in which the bus bar frame 500 positions the bus bar 600 will be described later.

  Bus bar 600 is a bus bar electrically connected to each of the plurality of power storage elements 100. That is, the bus bar 600 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.

  The bus bar 600 is made of, for example, aluminum as a conductive member, but the material of the bus bar 600 is not particularly limited. In addition, the bus bar 600 may be formed of a member made of the same material, or one of the bus bars may be formed of a member made of a different material.

  Next, the structure of the electrical storage element 100 is demonstrated in detail.

  FIG. 5 is a perspective view showing a configuration of power storage element 100 according to the embodiment of the present invention. Specifically, this figure is a perspective view showing the inside of the electricity storage device 100 through the container 110 of the electricity storage device 100.

  As shown in the figure, the electricity storage element 100 includes a container 110, a positive electrode terminal 120, and a negative electrode terminal 130. In addition, an electrode body 140, a positive electrode current collector 150, and a negative electrode current collector 160 are disposed inside the container 110. In addition, although liquids, such as electrolyte solution, are enclosed in the inside of the container 110, illustration of the said liquid is abbreviate | omitted.

  The container 110 is composed of a rectangular cylindrical body made of metal and having a bottom, and a metal lid that closes the opening of the body. The container 110 can seal the inside by welding the lid portion and the main body after the electrode body 140 and the like are accommodated therein.

  The electrode body 140 includes a positive electrode, a negative electrode, and a separator, and is a power generation element that can store electricity. Specifically, the electrode body 140 is a wound electrode body formed by winding what is arranged in layers so that a separator is sandwiched between a positive electrode and a negative electrode. The electrode body 140 may be a laminated electrode body in which flat plate plates are laminated.

  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 or the like. 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 energy storage device 100 are not particularly different from those conventionally used, and any known material can be used as long as the performance of the energy storage device 100 is not impaired. Further, the electrolyte solution (nonaqueous electrolyte) sealed in the container 110 is not particularly limited as long as it does not impair the performance of the power storage device 100, and various types can be selected.

  The positive electrode terminal 120 is an electrode terminal electrically connected to the positive electrode of the electrode body 140 via the positive electrode current collector 150, and the negative electrode terminal 130 is the negative electrode of the electrode body 140 via the negative electrode current collector 160. The electrode terminal is electrically connected to. In other words, the positive electrode terminal 120 and the negative electrode terminal 130 lead the electricity stored in the electrode body 140 to the external space of the power storage element 100, and also store the electricity in the internal space of the power storage element 100 in order to store the electricity in the electrode body 140. It is an electrode terminal made of metal for introducing.

  The positive electrode current collector 150 is a member that is disposed between the positive electrode of the electrode body 140 and the side wall of the container 110 and has electrical conductivity and rigidity that are electrically connected to the positive electrode terminal 120 and the positive electrode. The positive electrode current collector 150 is made of aluminum, an aluminum alloy, or the like, like the positive electrode current collector foil of the positive electrode. The negative electrode current collector 160 is disposed between the negative electrode of the electrode body 140 and the side wall of the container 110, and has conductivity and rigidity that are electrically connected to the negative electrode terminal 130 and the negative electrode of the electrode body 140. It is a member. Note that the negative electrode current collector 160 is formed of copper, a copper alloy, or the like, similarly to the negative electrode current collector foil.

  Next, the configuration of the spacer 200 will be described in detail.

  6A and 6B are perspective views showing the configuration of the spacer 200 according to the embodiment of the present invention. FIG. 6A includes an enlarged view for explaining the configuration of the cross protrusion 231. FIG. 7 is a plan view showing the configuration of the spacer 200 according to the embodiment of the present invention.

  As shown in these drawings, the spacer 200 includes a plate-like member 210 as a first plate-like member disposed on the Z-axis direction side of the power storage element 100, both sides of the power storage element 100 in the X-axis direction, and the Y-axis direction. And wall portions 220 disposed on both sides of the main body.

  The spacer 200 includes a compression protrusion 211, an annular protrusion 212, and hollow protrusions 213 and 214 that protrude from the plate-like member 210 toward both sides in the Z-axis direction. The plate-like member 210 is a rectangular plate-like member that is formed along the XY plane and is long in the X-axis direction. The compression protrusion 211, the annular protrusion 212, and the plurality of hollow protrusions 213 and 214 are in contact with the power storage element 100 in a state where a restraining force is applied between the power storage element 100 and the spacer 200 by the restraining member 400. It is a protrusion.

  The pressing protrusion 211 presses the power storage element 100 by contacting the power storage element 100. The compression protrusion 211 is formed near the center of the plate-like member 210 and protrudes in a rectangular shape that is long in the X-axis direction when viewed from the Z-axis direction. That is, the pressing protrusion 211 is provided at a position facing the center of the side surface of the power storage element 100.

  The annular protrusion 212 protrudes in an annular shape toward the electricity storage element 100 and abuts against the electricity storage element 100 so as to seal the annular inner space. The annular projecting portion 212 projects from the outer peripheral portion of the plate-like member 210 toward both sides in the Z-axis direction. That is, the spacer 200 has two annular protrusions 212 that protrude toward the two power storage elements 100 provided on both sides of the plate-like member 210. The annular protrusion 212 is formed so as to surround the compression protrusion 211 along the inside of the wall 220. That is, the compression protrusion 211 is formed in the inner space of the annular protrusion 212. In addition, the annular protrusion 212 is formed along the outer peripheral portion of the side surface of the electricity storage element 100.

  The plurality of hollow protrusions 213 and 214 protrude toward the power storage element 100 so that a space is formed inward. The plurality of hollow projecting portions 213 and 214 have a shape in which the opposite side of the projecting portion is recessed so as to follow the projecting shape. That is, in the plurality of hollow projecting portions 213 and 214, a space formed by recessing the opposite side of the projecting portion is formed inward. The plurality of hollow protrusions 213 and 214 have a shape that is inclined so that the distance in the direction perpendicular to the protrusion direction becomes smaller toward the tip. That is, the plurality of hollow projecting portions 213 and 214 project in a substantially truncated cone shape.

  The plurality of hollow projecting portions 213 and 214 include a plurality of first hollow projecting portions 213 projecting from the plate-like member 210 to the Z-axis direction plus side and a plurality of hollow projecting portions 213 and 214 projecting from the plate-like member 210 to the Z-axis direction minus side. A second hollow protrusion 214. That is, the first hollow protrusion 213 protrudes toward one of the two power storage elements 100 provided on both sides of the spacer 200. The second hollow protrusion 214 protrudes toward the other of the two power storage elements 100. The first hollow projecting portion 213 and the second hollow projecting portion 214 differ only in projecting toward opposite sides, and the projecting and recessed shapes are the same. The plurality of hollow protrusions 213 and 214 are arranged in an annular shape in the inner space of the annular protrusion 212 so as to surround the compression protrusion 211. In addition, each of the plurality of first hollow protrusions 213 and each of the plurality of second hollow protrusions 214 are alternately arranged.

  Wall portion 220 extends from the outer edge of plate-like member 210 toward both sides in the Z-axis direction, and is formed so as to surround the four sides of power storage element 100. That is, a recess that covers substantially half of the spacer 200 on the front side or the back side of the power storage element 100 is formed by the plate-like member 210 and the wall 220. Wall portion 220 is provided on wall portion 221 provided on the Y axis direction plus side of power storage element 100, wall portion 222 provided on the Y axis direction minus side of power storage device 100, and on the X axis direction plus side of power storage device 100. Wall portion 223 and a wall portion 224 provided on the minus side in the X-axis direction of power storage element 100.

  The wall 220 is formed with a cross protrusion 230 that protrudes in a cross shape from the wall 220 toward the outside of the wall 220. Specifically, the wall portion 221 is formed with two cross protrusion portions 231 that protrude to the Y axis direction plus side, and the wall portion 222 has two cross protrusion portions that protrude to the Y axis direction minus side. 232 is formed, a cross protrusion 233 protruding to the X axis direction plus side is formed on the wall 223, and a cross protrusion 234 protruding to the X axis direction negative side is formed on the wall 224. Is formed.

  The shape of the cross protrusion part 231 is demonstrated using the enlarged view of FIG. 6A. The other cruciform protrusions 232 to 234 are different from the cruciform protrusion 231 only in the projecting direction and have the same shape, and thus the description thereof is omitted. As shown in the enlarged view of FIG. 6A, the cross protrusion 231 has a main protrusion 231a having an elongated shape in the X-axis direction. That is, the cross protrusion 231 protrudes toward the Y axis direction plus side so that a long main protrusion 231a extending in a direction parallel to the plate member 210 is formed. The cross protrusion 231 further includes a long-shaped sub-projection 231b that intersects the long-shaped main protrusion 231a. That is, the sub protrusion 231b has a long shape extending in the Z-axis direction. Specifically, the cross protrusion 231 is formed such that the sub protrusions 231b extending from the main protrusion 231a toward both sides in the Z-axis direction are formed at two positions on both ends in the X-axis direction of the main protrusion 231a. It protrudes toward the Y axis direction plus side. That is, the cross protrusion 231 has a long shape along the X-axis direction and the Z-axis direction. In other words, the cross protrusion 231 protrudes in a cross shape in the Y-axis direction. Thus, since the cross protrusion 230 is formed on the wall 220, the spacer main body including the plate-like member 210 and the wall 220, the restraint member 400, and the restraint member 400. Can be filled with the cross protrusion 230. That is, the cross protrusion 230 functions as a filling member disposed between the spacer body and the restraining member 400. Moreover, since the cross protrusion part 230 is formed so that it may protrude from the wall part 220, the spacer main-body part and the filling member are integrally formed.

  The spacer 200 includes a plurality of protrusions 241 and 242 as second protrusions that are disposed at positions that contact the surface intersecting the surface of the electricity storage element 100 with which the annular protrusion 212 contacts. In the present embodiment, the spacer 200 includes four protrusions 241 formed so as to straddle the end on the negative side in the X-axis direction of the plate-like member 210 and the wall portion 224, and the Y of the plate-like member 210. It has four protrusions 242 formed so as to straddle the end portion on the positive side in the axial direction and the wall portion 221.

  When the power storage element 100 is disposed at a predetermined position on the side of the spacer 200, the plurality of protrusions 241 contact the power storage element 100 in the X-axis direction by contacting the negative surface of the power storage element 100 in the X-axis direction. Energize toward the plus side. Since the storage element 100 is urged toward the plus side in the X-axis direction by the plurality of protrusions 241, the side surface on the plus side in the X-axis direction of the storage element 100 comes into contact with the wall part 223. That is, the storage element 100 is positioned in the X-axis direction with respect to the spacer 200 by the plurality of protrusions 241 and the wall part 223.

  When the power storage element 100 is arranged at a predetermined position on the side of the spacer 200, the plurality of protrusions 242 contact the power storage element 100 on the positive side surface in the Y axis direction, thereby causing the power storage element 100 to move in the Y axis direction. Energize toward the minus side. Since the storage element 100 is biased toward the minus side in the Y-axis direction by the plurality of protrusions 242, the side surface on the minus side in the Y-axis direction of the storage element 100 abuts the wall portion 222. That is, the storage element 100 is positioned in the Y-axis direction with respect to the spacer 200 by the plurality of protrusions 242 and the wall 222.

  Thus, since the spacer 200 has a configuration in which the plurality of protrusions 241, 242, the wall 222, and the wall 223 are formed, the X-axis direction and the Y-axis direction between the storage element 100 and the spacer 200 are configured. Can be easily positioned.

  The spacer 200 is integrally formed. That is, the plate-like member 210, the wall 220, the protrusions 211, 212, 213, 214, 230 and the plurality of protrusions 241 and 242 included in the spacer 200 are integrally formed of the above-described material (resin). It is formed by.

  Next, the structure of the clamping member 300 will be described in detail.

  FIG. 8 is a perspective view showing the configuration of the clamping member 310 according to the embodiment of the present invention. In the present embodiment, the sandwiching member 320 has the same shape as that of the sandwiching member 310 except for the direction of the sandwiching member 310, and the description thereof will be omitted.

  The sandwiching member 310 is a plate-like member 311 as a rectangular second plate-like member that is formed along the XY plane and is long in the X-axis direction, and extends from the plate-like member 311 to the negative side in the Z-axis direction. And connection portions 312 to 315 arranged on both sides in the X-axis direction and both sides in the Y-axis direction of the electricity storage device 100. The sandwiching member 310 is a dual structure member configured by overlapping a resin member on the negative side in the Z-axis direction of a metal member. Instead of a double-structured clamping member, a single-structured clamping member may be employed.

  Connection portions 312 to 315 extend from the outer edge of plate-shaped member 311 toward the negative side in the Z-axis direction, and surround four sides of power storage element 100a arranged on the positive side in the Z-axis direction among a plurality of power storage elements 100. Formed. Here, connection portion 312 is provided on the positive side in the Y-axis direction of power storage element 100a. Connection portion 313 is provided on the negative side in the Y-axis direction of power storage element 100a. Connection portion 314 is provided on the positive side in the X-axis direction of power storage element 100a. Connection portion 315 is provided on the minus side in the X-axis direction of power storage element 100a.

  Screw holes 312a and 314a (screw holes corresponding to the connecting portions 313 and 315 are not shown) for connecting the restraining member 400 are formed in the connecting portions 312 to 315, respectively. That is, the restraining members 410 to 440 are screw holes provided in the connection portions 312 to 315 using fastening members 411 to 441 (see FIG. 9) such as bolts in a direction intersecting with the connection portions 312 to 315. It is connected to 312a, 314a.

  The connecting portions 312 to 315 are formed by bending at a portion of the clamping member 310 that is made of a metal member. That is, in the part comprised by the metal members of the clamping member 310, the plate-shaped member 311 and the connection parts 312 to 315 are bent by press working on a single metal plate-shaped member. It is formed by being done. In addition, the clamping member 310 is formed in each connection part 312-315 by being driven along the direction which cross | intersects with respect to the line which the plate-shaped member 311 and each of the connection parts 312-315 cross | intersect. Reinforcing portions 312b to 315b are provided. That is, the plurality of reinforcing portions 312b to 315b protrude from the connecting portions 312 to 315 toward the spacer 200 side. The plurality of reinforcing portions 312b to 315b are formed so as to straddle the inner surfaces of the plate member 311 and the connecting portions 312 to 315. That is, the plurality of reinforcing portions 312b to 315b are along a direction intersecting with a line where the plate-like member 311 and each of the connection portions 312 to 315 intersect (that is, a bending direction in which bending is performed). Since it protrudes, the section modulus in the said direction can be improved. Thereby, the intensity | strength of the bending process part between the plate-shaped member 311 and each connection part 312-315 can be improved.

  Next, the relationship between the restraining member 400 and the spacer 200 will be described with reference to FIGS.

  FIG. 9 is a cross-sectional view taken along line AA of the components in FIG. 3 in which the bus bar frame 500 and the bus bar 600 are separated from the power storage unit 30. FIG. 10 is a diagram showing a BB cross section of the components of FIG. 3 in which the bus bar frame 500 and the bus bar 600 are separated from the power storage unit 30. FIG. 10 includes an enlarged view in which the region A1 is enlarged.

  As shown in these drawings, cross protrusions 231 to 234 are arranged between the restraining member 400 arranged on the positive side in the Y-axis direction of the electricity storage element 100 and the spacer main body. Since the cross protrusions 231 to 234 are arranged in this way, the restraining member 400 applies the urging force (the white arrow in FIGS. 9 and 10) to the cross protrusions 231 to 234. It is fixed to it.

Here, two cross protrusions 231 are arranged between each of the two long and flat members that constitute the restraining member 410 and are arranged in the X-axis direction and the wall portion 221 of the spacer 200. The two cross protrusions 232 are formed between each of the two long and flat members arranged in the X-axis direction and constituting the restraining member 420 and the wall portion 222 of the spacer 200. Has been placed. That is, two long and flat members and two cross protrusions 231 and 232 corresponding to the two members are arranged at both ends of the storage element 100 and the spacer 200 in the Y-axis direction. ing.

  Further, the two restraining members 430 and 440 arranged at both ends in the X-axis direction of the power storage element 100 and the spacer 200 are arranged at different positions in the Y-axis direction, and are provided corresponding to the restraining members 430 and 440. The cross protrusions 233 and 234 of the spacer 200 are also arranged at different positions in the Y-axis direction. More specifically, the restraining member 430 and the cross protrusion 233 are disposed at positions on the power storage element 100 and the spacer 200 from the plus side in the Y-axis direction, and the restraining member 440 and the cross protrusion 234 are included in the power storage element 100. And the spacer 200 is disposed at a position from the Y axis direction minus side. In addition, the two restraining members 430 and 440 and the cross protrusions 233 and 234 provided corresponding thereto are arranged at positions that are substantially symmetrical with respect to the center of the power storage element 100. That is, the two restraining members 430 and 440 and the cross protrusions 233 and 234 provided corresponding to these are arranged at staggered positions so as not to face each other in the X-axis direction.

  As shown in FIG. 10, cross-projections 231 and 232 are disposed between the restraining members 410 and 420 and each of the plurality of spacers 200 disposed between the plurality of power storage elements 100. . That is, a plurality of cross protrusions 231 and 232 are disposed between the restraining members 410 and 420 and the plurality of spacers 200. The plurality of cross protrusions 231 and 232 are provided side by side in the direction in which the restraining members 410 and 420 extend (that is, the Z-axis direction) in a state of being separated from each other.

  The cross protrusion 231 is provided on an extension line of the plate member 210. In other words, the cross protrusion 231 is provided at a position where the plate-like member 210 is extended to the Y axis direction plus side. Although not shown, the other cross protrusions 232 to 234 are also provided at positions where the plate-like members 210 are extended to the Y axis direction minus side, the X axis direction plus side, and the X axis direction minus side, respectively. ing.

  The cross protrusions 231 and 232 are provided on the negative side in the Z-axis direction of the connecting portion 312 and the reinforcing portion 312b of the clamping member 310. The cross protrusions 231 and 232 are provided on the positive side in the Z-axis direction of the connecting portion and the reinforcing portion of the clamping member 310. Further, although not shown, the other cross protrusions 233 and 234 are similarly provided on both sides in the Z-axis direction of the connecting portions and the reinforcing portions provided at both ends of the holding members 310 and 320 in the X-axis direction, respectively. It is done.

  As described above, the power storage device 1 according to the embodiment of the present invention has the cross protrusion 230 as a filling member disposed between the spacer body and the restraining member 400. In other words, since the cross protrusion 230 is formed between the spacer main body and the restraining member 400, the spacer 200 may be displaced toward the restraining member 400 even if vibration or impact is applied to the power storage device 1. Can be suppressed.

  The spacer 200 and the cross protrusion 230 as a filling member are integrally formed. For this reason, the strength between the spacer 200 and the cross protrusion 230 can be improved. For this reason, even if vibration or impact is applied to the power storage device 1, it is possible to suppress the cross protrusion 230 from being displaced from a predetermined position between the spacer 200 and the restraining member 400.

  In addition, the cross protrusion 230 is a part of the spacer 200 and is provided on the wall 220 arranged on both sides in the X-axis direction and both sides in the Y-axis direction of the power storage element 100. For this reason, it is possible to widen an area between the spacer 200 and the restraining member 400 where the cross protrusion 230 is disposed. Thereby, it can suppress more reliably that the spacer 200 shifts toward the restraint member 400.

  The cross protrusion 230 is provided on an extension line of the plate member 210. For this reason, when a force directed to the spacer 200 is applied from the restraining member 400, the force can be efficiently transmitted to the plate-like member 210. Thereby, it can suppress more reliably that the spacer 200 shifts toward the restraint member 400.

  The cross protrusion 230 has a main protrusion having a long shape in a direction parallel to the plate-like member 210. That is, since the cross protrusion 230 has a long shape in a direction intersecting with the restraining member 400 extending in the Z-axis direction, the restraint member 400 and the spacer even when the main protrusion is displaced from the restraining member 400 in the extending direction. 200. Thereby, even if a vibration or impact is applied to the power storage device 1, the spacer 200 can be more reliably suppressed from being displaced toward the restraining member 400.

  In addition, the cross protrusion 230 has a sub-projection having a shape provided so as to intersect with the long main projection. For this reason, the strength of the cross protrusion 230 can be improved.

  Further, the restraining member 400 is fixed to the spacer 200 so as to apply a biasing force to the cross protrusion 230. That is, since the spacer 200 is pressed by the restraining member 400 via the cross protrusion 230, the spacer 200 is more likely to be displaced toward the restraining member 400 even if vibration or impact is applied to the power storage device 1. It can be reliably suppressed.

  In addition, the sandwiching member 310 of the pair of sandwiching members 310 and 320 that sandwich the storage element 100 and the spacer 200 in the Z-axis direction includes a plate-like member 311 provided on the plus side (or minus side) of the storage element 100 in the Z-axis direction, It has connection parts 312 to 315 provided on both sides in the X-axis direction and both sides in the Y-axis direction of at least one of the power storage element 100 and the spacer 200 and to which the restraining member 400 is connected. In addition, the clamping member 320 has the same configuration as that of the clamping member 310. In other words, even if the connection portion of the clamping member 300 is provided between the restraining member 400 and the spacer 200 or the power storage element 100, the cross protrusion 230 is provided between the restraining member 400 and the spacer 200. Therefore, the gap between the restraining member 400 and the spacer 200 or the power storage element 100 generated by providing the connection portion can be filled with the cross protrusion 230. For this reason, even if a vibration or impact is applied to the power storage device 1, the spacer 200 can be more reliably suppressed from being displaced toward the restraining member 400.

  The clamping member 310 includes reinforcing portions 312 b to 315 b that are provided across the plate-like member 311 and the connection portions 312 to 315 and project toward the spacer 200. In addition, the clamping member 320 has the same configuration as that of the clamping member 310. In other words, even if a sandwiching member having a configuration in which a reinforcing portion that protrudes toward the spacer 200 is provided and a gap is further generated between the restraining member 400 and the spacer 200 is adopted, Since the cross protrusion 230 is provided, the gap can be filled with the cross protrusion 230. For this reason, it can suppress more reliably that the spacer 200 shifts | deviates toward the restraint member 400, improving the intensity | strength of the clamping member 300. FIG.

  In addition, a plurality of cross protrusions 230 are provided between the plurality of spacers 200 and the restraining member 400 of the power storage device 1, and the plurality of cross protrusions 230 are separated from each other, They are arranged side by side in the extending direction (that is, the Z-axis direction). That is, the plurality of cross protrusions 230 are discretely and independently provided between the restraining member 400 and the plurality of spacers 200. For this reason, the deformation of one cross protrusion 230 of the plurality of cross protrusions 230 does not affect the other cross protrusion 230. Thereby, each of the plurality of cross protrusions 230 can easily come into contact with the restraining member 400 and the spacer 200. For this reason, it can suppress more reliably that the some spacer 200 shifts toward the restraint member 400. FIG.

  The power storage device 1 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.

  For example, in the above embodiment, the cross protrusion 230 as the filling member is formed integrally with the spacer 200. However, the present invention is not limited to this, and a separate filling member is provided between the restraining member and the spacer. It may be a configuration. Moreover, the electrical storage apparatus with which the restraint member in which the protrusion part as a filling member protrudes toward a spacer may be employ | adopted. In this case, the spacer may not be provided with a protruding portion as a filling member, or both the spacer and the restraining member may be provided with a filling member. The protruding portion as the filling member formed on the restraining member may be formed by projecting a metal member constituting the restraining member, or may be integrated by joining another member made of resin. May be formed. Note that the filling member is preferably made of a resin rather than a metal so that the power storage element 100 is not easily damaged even when an external force is applied.

Moreover, in the said embodiment, although the cross protrusion parts 231-234 as a filling member are formed between the spacer 200 as an insulating member, and the restraint member 400, a filling member is the spacer 200 and the restraint member 400. It may not be formed between .

  Moreover, in the said embodiment, although the restraint member 400 is being fixed with respect to the spacer 200 in the state which provided the urging | biasing force to the cross protrusion part 230 as a filling member, not only this but the restraint member 400 is filling The member may be configured such that the member is not in contact with the urging force but is in contact with the member, or the spacer 200 is filled with the restraining member 400 as long as the spacer 200 is restricted from moving toward the restraining member 400. It is not always necessary to contact the member.

  Moreover, in the said embodiment, although the cross protrusion part 230 as a filling member is the structure provided in the wall part 220 of the spacer 200, it is not restricted to this. For example, in the case of a spacer in which a wall portion is not formed, it is sufficient that a filling member is disposed between the spacer and the restraining member.

  In the above embodiment, the cross protrusion 230 as the filling member is provided on the extension line of the plate-like member 210. However, the present invention is not limited to this, and the filling member is interposed between the spacer and the restraining member. As long as it is arrange | positioned, it does not need to be arrange | positioned on the extension line | wire of a plate-shaped member.

  Further, in the above embodiment, the cross projecting portion 230 that protrudes in a cross shape is formed as the filling member, but it does not have to protrude in the cross shape, and may be a rectangular shape, a polygonal shape, a circular shape, an elliptical shape, or the like. You may protrude in various shapes.

  In the above embodiment, the sandwiching member 300 is formed with a reinforcing portion that protrudes toward the spacer 200 (that is, toward the inside of the connection portion between the plate-like member 311 and the connection portions 312 to 315). However, the present invention is not limited to this, and a holding member in which a reinforcing portion that protrudes toward the restraining member 400 (that is, the outside of the connection portion between the plate-like member and the connection portion) is formed may be employed. In addition, the reinforcement part which protrudes toward the outer side of the connection part of a plate-shaped member and a connection part may be formed by driving in toward the outer side, or the plate-shaped member provided with the thick part is made into meat. You may form by bending so that a thick part may become an outer side. In addition, when forming the reinforcement part by driving, it is preferable to drive inward because it is easier to make. The thick part may be formed by being thickened by welding. The thick portion can also be applied to a reinforcing portion provided inside the connection portion between the plate-like member and the connection portion. In addition, the reinforcing part may project the inner part of the connecting part of the plate-like member and the connecting part, rather than the part formed by projecting inward rather than projecting outward. Since it can do, the structure of a clamping member can be made compact.

  Moreover, in the said embodiment, although the reinforcement part is formed in the clamping member 300, a reinforcement part may be formed in a restraint member. In addition, as a reinforcement part formed in a restraint member, the protrusion part of the protrusion extended in the direction where a restraint member extends can be considered. This reinforcement part may be provided in the part connected with the connection part of the clamping member which is the part to which stress is most easily applied among the restraining members. Thereby, even if a vibration and an impact are given to an electrical storage device, it can reduce that a restricting member changes in the portion concerned. Moreover, even if it is a restraint member in which such a reinforcement part was formed, since it is the structure by which a filling member is provided between a restraint member and a spacer, it prevents that an electrical storage element moves toward a restraint member. be able to.

  Further, the present invention can be realized not only as such a power storage device 1 but also as a spacer 200 provided in the power storage device 1.

  In addition, embodiments constructed by arbitrarily combining the constituent elements included in the above-described embodiment and its modifications are also included in the scope of the present invention.

  The present invention is useful as a power storage device including a power storage element and a spacer disposed on the side of the power storage element.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Exterior body 11 First exterior body 12 Second exterior body 21 Positive external terminal 22 Negative external terminal 30 Electrical storage unit 40 Electrical device 100, 100a, 100b Electrical storage element 110 Container 120 Positive electrode terminal 130 Negative electrode terminal 140 Electrode body 150 Positive electrode Current collector 160 Negative electrode current collector 200 Spacer 210 Plate-like member 211 Compression protrusion 212 Ring protrusion 213 First hollow protrusion 214 Second hollow protrusion 220, 221, 222, 223, 224 Wall 230, 231, 232 233, 234 Cross projection 231a Main projection 231b Sub projection 241 242 Projection 300, 310, 320 Clamping member 311 Plate member 312, 313, 314, 315 Connection portion 312a, 314a Screw hole 400, 410, 420 430, 440 Restraint member 500 bar Bar frame 600 bus bar

Claims (9)

A plurality of power storage elements;
A plurality of insulating members arranged alternately in the second direction with the plurality of power storage elements;
The plurality of power storage elements and the plurality of insulating members are respectively disposed on one side and the other side of the first direction intersecting the second direction, and the second power supply unit is arranged with respect to the plurality of power storage elements and the plurality of insulating members. A first restraining member and a second restraining member for imparting restraining force in the direction;
A filling member arranged between the gap between the first restraining member and the plurality of insulating members,
The first restraining member and the second restraining member are respectively connected to one side and the other side of the second direction of the plurality of power storage elements and the plurality of insulating members, and the first restraining member and A first sandwiching member and a second sandwiching member that apply the restraining force from the second restraining member to the plurality of power storage elements and the plurality of insulating members,
The first restraining member is connected to the first clamping member and the second clamping member in the first direction, so that the plurality of insulating members are configured to apply a biasing force in the first direction to the filling member. A power storage device fixed to the member. The first clamping member has a pre-SL two first connecting portion provided on the one side and the other side of the first direction,
The second clamping member has two second connection portions provided on the one side and the other side in the first direction,
The first restraining member is connected to one of the two first connection portions and one of the two second connection portions in the first direction,
The power storage device according to claim 1, wherein the second restraining member is connected to the other of the two first connection portions and the other of the two second connection portions in the first direction. The first restraining member, the first clamping member and the second clamping member are connected to each other in the first direction by a first fastening member extending in the first direction,
The electrical storage according to claim 1 or 2, wherein the second restraining member, the first clamping member, and the second clamping member are connected to each other in the first direction by a second fastening member extending in the first direction. apparatus. A plurality of power storage elements in which electrode terminals are arranged on one side in the first direction;
A plurality of insulating members arranged alternately in the second direction intersecting the plurality of power storage elements and the first direction;
The plurality of power storage elements and the plurality of insulating members are respectively disposed on the one side and the other side in the first direction, and the binding force in the second direction is applied to the plurality of power storage elements and the plurality of insulating members. A first restraining member and a second restraining member to be applied;
The first restraining member and the second restraining member are respectively connected to one side and the other side of the second direction of the plurality of power storage elements and the plurality of insulating members, and the first restraining member and A first clamping member and a second clamping member that apply the binding force from the second binding member to the plurality of power storage elements and the plurality of insulating members;
Filled with a first filling member for restricting the movement of the plurality of insulating members to the one side of the first direction by being disposed between the gap between the first restraining member and the plurality of insulating members A power storage device. further,
The plurality of power storage elements and the plurality of insulating members are arranged on one side in a third direction intersecting the first direction and the second direction, and the first power supply element and the plurality of insulating members are Having a third restraining member that imparts restraining force in two directions;
The filling member is further third for restricting movement of the insulating member to the one side of the third direction being arranged between the gap of between the plurality of insulating members third restraining member The power storage device according to claim 4, further comprising a filling member. A plurality of power storage elements;
A plurality of insulating members arranged alternately in the second direction with the plurality of power storage elements;
Arranged on one side of the first direction intersecting the second direction of the plurality of power storage elements and the plurality of insulating members, the binding force in the second direction with respect to the plurality of power storage elements and the plurality of insulating members A first restraining member for providing
A second restraint that is disposed on the other side of the first direction of the plurality of power storage elements and the plurality of insulating members and applies a restraining force in the second direction to the plurality of power storage elements and the plurality of insulating members. Members,
The first restraining member and the second restraining member are respectively connected to one side and the other side of the second direction of the plurality of power storage elements and the plurality of insulating members, and the first restraining member and A first clamping member and a second clamping member that apply the binding force from the second binding member to the plurality of power storage elements and the plurality of insulating members;
The first filling member for restricting the movement of the plurality of insulating members to the one side of the first direction by being disposed between the gap between the first restraining member and the plurality of insulating members and, having a second filler member, for restricting the movement of the plurality of insulating members to the other side of the first direction by being disposed between the gap between the second constraining member and the plurality of insulating members A filling member,
The first restraining member and the second restraining member are disposed at different positions in a third direction intersecting the first direction and the second direction. A plurality of power storage elements;
A plurality of insulating members arranged alternately in the second direction with the plurality of power storage elements;
The plurality of power storage elements and the plurality of insulating members are respectively disposed on one side and the other side of the first direction intersecting the second direction, and the second power supply unit is arranged with respect to the plurality of power storage elements and the plurality of insulating members. A first restraining member and a second restraining member for imparting restraining force in the direction;
A filling member for restricting the movement of the plurality of insulating members to the one side of the first direction by being disposed between the gap between the first restraining member and the plurality of insulating members,
The plurality of power storage elements and the plurality of insulating members are sandwiched in the second direction, and the restraining force from the first restraining member and the second restraining member is applied to the plurality of power storage elements and the plurality of insulating members. A first clamping member and a second clamping member to be provided,
The first clamping member includes a first plate-like member provided on one side in the second direction of the plurality of power storage elements and the plurality of insulating members, and the plurality of power storage elements and the plurality of insulating members. Two first connection portions provided on the one side and the other side in the first direction of at least one member, respectively, and connected to the first restraining member and the second restraining member, respectively. ,
The second clamping member includes a second plate-like member provided on the other side in the second direction of the plurality of power storage elements and the plurality of insulating members, and the plurality of power storage elements and the plurality of insulating members. Two second connection portions provided on the one side and the other side of the first direction of at least one member, respectively, and connected to the first restraining member and the second restraining member, respectively. ,
At least one of the first clamping member and the second clamping member is further provided between each of the first plate-shaped member and the two first connection portions, and between the second plate-shaped member and the two second clamping members. Having a reinforcing part provided across at least one of the two connecting parts,
The filling member is provided between the first connection portion and the second connection portion in the second direction,
The first connection portion is formed by being bent from the first plate-shaped member toward the plurality of power storage elements,
The second connection portion is formed by being bent from the second plate-shaped member toward the plurality of power storage elements,
It said reinforcing portion includes: the first plate-shaped member and the two connecting portions of the first connecting portion, the second plate-shaped member and the two connecting portions of the second connecting portion, at least from one of these A power storage device that protrudes toward the inside of the connection portion or toward the outside of the connection portion . Each of the plurality of insulating members is disposed on a third plate-like member disposed on the one side in the second direction of the plurality of power storage elements, and on the one side in the first direction of the power storage elements. And a wall
The power storage device according to claim 1, wherein the filling member is provided on the wall portion. The power storage device according to claim 8, wherein the filling member is provided on an extension line of the third plate-like member.

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