JP2021132016A - Power storage device - Google Patents

Abstract

To provide a power storage device capable of easily attaching an insulating member arranged on an electrode terminal side of a power storage element to the power storage element.SOLUTION: A power storage device 10 includes a power storage element 210 having an electrode terminal 210b protruding in a first direction, a pair of end plates 230 arranged at positions sandwiching the power storage element 210 in a second direction intersecting the first direction, and an insulating member (bus bar frame 260) arranged in the first direction of the power storage element 210, and the insulating member includes frame mounting portions 263 and 264 that are attached to the plate member, which is at least one end plate 230 of the pair of end plates 230.SELECTED DRAWING: Figure 7

Description

The present invention relates to a power storage device including a power storage element having an electrode terminal and an insulating member arranged on the electrode terminal side of the power storage element.

Conventionally, there is known a power storage device having a power storage element having an electrode terminal and an insulating member arranged on the electrode terminal side of the power storage element, and having an insulating member attached to the power storage element. For example, Patent Document 1 discloses a secondary battery device (power storage device) having a configuration in which a top cover (insulating member) on the electrode terminal side of a secondary battery cell (storage element) is attached to a case body. ..

Japanese Unexamined Patent Publication No. 2012-248482

In the power storage device, it may be difficult to attach the insulating member to the case as in the conventional power storage device due to space or layout. However, from the viewpoint of space saving (miniaturization) and reduction of the number of parts, it may be difficult to arrange a member for attaching the insulating member to the power storage element. As described above, in the power storage device, it may be difficult to attach the insulating member to the power storage element.

The present invention has been made by the inventor of the present application with a new focus on the above-mentioned problems, and provides a power storage device capable of easily attaching an insulating member arranged on the electrode terminal side of the power storage element to the power storage element. The purpose is to do.

In order to achieve the above object, the power storage device according to one aspect of the present invention has a power storage element having an electrode terminal protruding in the first direction and a position where the power storage element is sandwiched in a second direction intersecting the first direction. A plate comprising a pair of end plates arranged in the above and an insulating member arranged in the first direction of the power storage element, wherein the insulating member is at least one end plate of the pair of end plates. It has a mounting part that can be attached to a member.

According to this, in the power storage device, the insulating member arranged in the first direction (electrode terminal side) of the power storage element is at least one end plate of a pair of end plates sandwiching the power storage element in the second direction. It has a mounting part that can be mounted on a plate member. In this way, by attaching the insulating member to at least one end plate of the pair of end plates, the insulating member can be easily attached to the power storage element.

Further, the power storage device includes a plurality of the power storage elements arranged in the first direction and a third direction intersecting the second direction, and the pair of end plates sandwich the plurality of power storage elements in the second direction. It may be arranged in a position.

According to this, in the power storage device, the pair of end plates are arranged at positions where a plurality of power storage elements arranged in the third direction are sandwiched in the second direction. As described above, when a plurality of power storage elements are arranged in the third direction, the length of the pair of end plates sandwiching the plurality of power storage elements in the second direction becomes long in the third direction. As a result, the length of the side of the end plate facing the insulating member becomes longer, which makes it easier to attach the insulating member to the end plate, so that the insulating member can be easily attached to the power storage element.

Further, one of the mounting portion and the plate member may have a first protrusion protruding toward the other, and the other may have an opening into which the first protrusion is inserted.

According to this, one of the mounting portion and the plate member of the insulating member has a first protrusion, and the other has an opening into which the first protrusion is inserted. By inserting the first protrusion of one of the mounting portion and the plate member into the opening of the other in this way, the insulating member can be mounted on the plate member with a simple structure. As a result, the insulating member can be easily attached to the power storage element.

Further, the one has a second protrusion protruding from the first protrusion in the first direction and a third direction intersecting with the second direction, and the other has a second protrusion in the first direction. It may have an engaging portion that engages with.

According to this, one of the mounting portion and the plate member of the insulating member has a second protrusion protruding from the first protrusion in the third direction, and the other engages with the second protrusion in the first direction. It has an engaging part. By engaging the second protrusion of one of the mounting portion and the plate member with the engaging portion of the other in this way, the insulating member can be mounted on the plate member with a simple structure. As a result, the insulating member can be easily attached to the power storage element.

Further, the insulating member has a plurality of the mounting portions, a plurality of the second protrusions are arranged corresponding to the plurality of mounting portions, and the plurality of the second protrusions are in opposite directions in the third direction. It may have at least two second protrusions protruding from the surface.

According to this, at least two second protrusions projecting in opposite directions in the third direction are arranged corresponding to the plurality of mounting portions of the insulating member. That is, at least two second protrusions on one side of the mounting portion and the plate member project in opposite directions in the third direction. Therefore, when the insulating member is displaced in the third direction with respect to the plate member, even if one second protrusion is disengaged from the engaging portion, the other second protrusion is engaged with the engaging portion. Can be maintained. As a result, the insulating member can be made difficult to come off from the plate member with a simple configuration, so that the insulating member can be easily attached to the power storage element in a state where it is hard to come off.

Further, a bus bar connected to the electrode terminal may be provided, and the mounting portion may be arranged in the second direction of the bus bar when viewed from the first direction.

According to this, the mounting portion of the insulating member is arranged in the second direction of the bus bar. By arranging the mounting portion on the side (second direction) of the bus bar in this way, the insulating member is mounted on the side of the bus bar with respect to the power storage element, so that the position of the insulating member with respect to the bus bar may shift. It is possible to prevent the insulating member from floating on the side of the bus bar. This makes it possible to suppress problems such as the insulating member becoming an obstacle when the bus bar is connected to the electrode terminal of the power storage element.

The present invention can be realized not only as a power storage device but also as a combination of the insulating member and the plate member.

According to the power storage device of the present invention, the insulating member arranged on the electrode terminal side of the power storage element can be easily attached to the power storage element.

It is a perspective view which shows the appearance of the power storage device which concerns on embodiment. FIG. 5 is a perspective view showing the inside of the exterior body by separating the main body and the lid of the exterior body in the power storage device according to the embodiment. It is an exploded perspective view which shows by disassembling the component inside the exterior body of the power storage device which concerns on embodiment. It is an exploded perspective view which shows each component by disassembling the power storage unit which concerns on embodiment. It is an exploded perspective view which shows each component by disassembling the power storage element which concerns on embodiment. It is a perspective view which shows the structure of the bus bar frame which concerns on embodiment. It is a perspective view which shows the structure of the end plate and the bus bar frame which concerns on embodiment.

Hereinafter, the power storage device according to the embodiment of the present invention (including a modification thereof) will be described with reference to the drawings. It should be noted that all of the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, manufacturing processes, order of manufacturing processes, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, in each figure, the dimensions and the like are not exactly shown. Further, in each figure, the same or similar components are designated by the same reference numerals.

Further, in the following description and drawings, the longitudinal direction of the exterior body of the power storage device, the arrangement direction of the power storage unit and the electric device, the arrangement direction of the pair of side plates, the extension direction of the pair of end plates, and the container of the power storage element. The opposite direction of the short side surfaces of the above, or the arrangement direction of the pair of electrode terminals in one power storage element is defined as the X-axis direction. The alignment direction of the power storage element and the bus bar or the bus bar frame, the lineup direction of the container body and the lid of the power storage element, or the protruding direction of the electrode terminal of the power storage element is defined as the Y-axis direction. The direction in which the main body and the lid of the exterior of the power storage device are arranged, the direction in which the pair of end plates are arranged, the direction in which the energy storage element and the end plate are arranged, the direction in which the long side surface of the container of the power storage element is opposed to each other, the flat direction of the power storage element, and the power storage The stacking direction or the vertical direction of the electrode plates of the electrode body of the element is defined as the Z-axis direction. These X-axis directions, Y-axis directions, and Z-axis directions are directions that intersect each other (orthogonally in the present embodiment). Depending on the usage mode, the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.

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

(Embodiment)
[1 General description of power storage device 10]
First, a schematic configuration of the power storage device 10 according to the present embodiment will be described. FIG. 1 is a perspective view showing the appearance of the power storage device 10 according to the present embodiment. FIG. 2 is a perspective view showing the inside of the exterior body 100 by separating the main body and the lid of the exterior body 100 in the power storage device 10 according to the present embodiment. FIG. 3 is an exploded perspective view showing the inner components of the exterior body 100 of the power storage device 10 according to the present embodiment in an exploded manner.

The power storage device 10 is a device capable of charging electricity from the outside and discharging electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment. For example, the power storage device 10 is a battery module (assembled battery) used for power storage, power supply, and the like. Specifically, the power storage device 10 is used for driving a moving body such as an automobile, a motorcycle, a watercraft, a ship, a snow mobile, an agricultural machine, a construction machine, or a railroad vehicle for an electric railway, or for starting an engine. It is used as a battery or the like. Examples of the above-mentioned automobiles include electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and gasoline vehicles. Examples of the railway vehicle for the electric railway include a train, a monorail, and a linear motor car. The power storage device 10 can also be used as a stationary battery or the like used for home use, a generator, or the like.

As shown in FIGS. 1 to 3, the power storage device 10 includes an exterior body 100, a power storage unit 200 housed in the exterior body 100, a mounting member 300, an electric device 400, and a bus bar unit 500. In addition to the above components, the power storage device 10 is connected to an exhaust unit for exhausting the gas discharged from the power storage unit 200 to the outside of the exterior body 100 and an electric device 400 by an electric wire or the like to the outside. It may be provided with a connector or the like for transmitting a signal with.

The exterior body 100 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the exterior body of the power storage device 10. That is, the exterior body 100 is arranged outside the power storage unit 200, the electric device 400, etc., and these power storage units 200, the electric device 400, etc. are fixed at predetermined positions to protect them from impacts and the like. The exterior body 100 includes, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (including modified PPE). PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene / perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin, or , It is formed of an insulating member such as a composite material thereof, or an insulating coated metal or the like. As a result, the exterior body 100 prevents the power storage unit 200, the electric device 400, and the like from coming into contact with external metal members and the like. The exterior body 100 may be made of a conductive member such as metal as long as the electrical insulation of the power storage unit 200 and the electric device 400 is maintained.

The exterior body 100 includes an exterior body body 110 that constitutes the main body of the exterior body 100, and an exterior body lid body 120 that constitutes the lid body of the exterior body 100. The exterior body body 110 is a bottomed rectangular tubular housing (housing) having an opening, and accommodates a power storage element 210, an electric device 400, and the like. The exterior body lid 120 is a flat rectangular member that closes the opening of the exterior body body 110. The exterior body lid 120 is preferably airtightly or watertightly bonded to the exterior body body 110 by an adhesive, heat seal, ultrasonic welding, or the like. Further, the exterior body lid 120 is provided with an external terminal 130 which is a pair of module terminals (total terminals) on the positive electrode side and the negative electrode side. The power storage device 10 charges electricity from the outside and discharges electricity to the outside through the pair of external terminals 130. The external terminal 130 is formed of, for example, a conductive member made of a metal such as aluminum, an aluminum alloy, copper, or a copper alloy.

The power storage unit 200 is flat and X-axis in the Z-axis direction by being stacked flat in the Z-axis direction and arranged in the X-axis direction in a state where a plurality of power storage elements 210 are laid horizontally (sideways). It has a long shape in the direction. Specifically, the power storage unit 200 has a plurality of power storage elements 210 arranged in the Z-axis direction and the X-axis direction, and a pair of end plates 230 and a pair of side plates 240 are arranged in the Z-axis direction and the X-axis together with spacers 220 and 223. It has a structure that sandwiches it in the direction. Further, a bus bar 250 is arranged on the bus bar frame 260 and is connected to the power storage element 210. A more detailed description of the configuration of the power storage unit 200 will be described later.

The electric device 400 is a device capable of monitoring the state of the power storage element 210 included in the power storage unit 200 and controlling the power storage element 210, and is attached to the power storage unit 200. In the present embodiment, the electric device 400 is a flat rectangular member arranged at the end of the power storage unit 200 in the longitudinal direction, that is, in the X-axis plus direction of the power storage unit 200. The electric device 400 has, for example, electrical components (electrical components) such as a circuit board, a shunt resistor, and a connector that monitor the charge state and discharge state of the power storage element 210 and control the charge / discharge state of the power storage element 210. ing. The electrical device 400 has a configuration in which these electrical components are housed in an insulating cover member.

The attachment member 300 is a member that attaches the electric device 400 to the power storage unit 200. That is, the mounting member 300 is a flat plate-shaped member that is arranged between the power storage unit 200 and the electric device 400, is mounted on the power storage unit 200, and the electric device 400 is mounted. The mounting member 300 is made of, for example, any electrically insulating resin material that can be used for the exterior body 100.

The mounting member 300 is arranged so as to face a surface of the electricity storage unit 200 that is different from the surface on which the electrode terminals of the electricity storage element 210 are arranged. Specifically, the mounting member 300 is arranged in the X-axis direction of the power storage unit 200. In the present embodiment, the mounting member 300 is mounted on the side surface of the power storage unit 200 in the plus direction of the X axis, so that the electric device 400 is erected (a posture parallel to the YZ plane) of the power storage unit 200. Attach to the side surface in the plus direction of the X axis. Further, the mounting member 300 is mounted on at least one of a pair of end plates 230 of the power storage unit 200 and a side plate 240 connecting the pair of end plates 230. In this embodiment, the mounting member 300 is mounted on both of the pair of end plates 230 and on the side plates 240 in the plus direction of the X axis.

The bus bar unit 500 electrically connects the power storage unit 200 and the electric device 400, electrically connects the electric device 400 and the external terminal 130, and electrically connects the power storage unit 200 and the external terminal 130. It is a member to be used. The bus bar unit 500 has a bus bar 510 and a relay 520.

The bus bar 510 connects the bus bar 250 and the electric device 400, which will be described later, of the power storage unit 200, connects the electric device 400 and the external terminal 130, connects the bus bar 250 and the relay 520, and connects with the relay 520. It is a plate-shaped member that connects to the external terminal 130. In the present embodiment, the bus bar 510 is connected (joined) to the bus bar 250, the electric device 400, the external terminal 130, or the relay 520 by bolt fastening, but may be connected (joined) by welding, caulking joining, or the like. The bus bar 510 is formed of, for example, a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, nickel, or a combination thereof, or a conductive member other than metal. The relay 520 is a relay (relay) arranged between the power storage unit 200 and the external terminal 130 via a bus bar 510.

[2 Explanation of configuration of power storage unit 200]
Next, the configuration of the power storage unit 200 will be described in detail with reference to FIG. 4 in addition to FIG. FIG. 4 is an exploded perspective view showing each component by disassembling the power storage unit 200 according to the present embodiment. In FIG. 4, the bus bar 250 and the bus bar frame 260 of the power storage unit 200 are omitted.

As shown in FIGS. 3 and 4, the power storage unit 200 includes a power storage element 210 (211 and 212), spacers 220 (221 and 222) and 223, an end plate 230 (231 and 232), and a side plate 240 (. It has 241 and 242, 243), a bus bar 250, and a bus bar frame 260.

The power storage element 210 is a secondary battery (cell battery) capable of charging electricity and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. .. The power storage element 210 has a flat rectangular parallelepiped shape (square shape), and in the present embodiment, the eight power storage elements 210 are laid horizontally (sideways) (the long side surface of the power storage element 210 is Z). They are arranged in the Z-axis direction and the X-axis direction (in the state of facing the axial direction). Specifically, the four first power storage elements 211 on the minus direction side of the X axis are stacked (flat stack) in the Z axis direction, and the four second power storage elements 212 on the plus direction side of the X axis are stacked in the Z axis direction (pile). (Flat stacking). Then, the four first power storage elements 211 and the four second power storage elements 212 are arranged side by side in the X-axis direction. A detailed description of the configuration of the power storage element 210 will be described later.

The number of power storage elements 210 is not particularly limited as long as they are arranged in the X-axis direction, and any number of power storage elements 210 may be stacked (flatly stacked) in the Z-axis direction. A plurality of power storage elements 210 may be arranged in the X-axis direction. Further, the shape of the power storage element 210 is not limited to the above-mentioned prismatic shape, and may be a polygonal pillar shape, a cylindrical shape, an elliptical pillar shape, a long cylindrical shape, or the like. Further, the power storage element 210 is not limited to the non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, or may be a capacitor. Further, the power storage element 210 may be a primary battery that can use the stored electricity without being charged by the user, instead of the secondary battery. Further, the power storage element 210 may be a battery using a solid electrolyte. Further, the power storage element 210 may be a laminated type power storage element.

The spacers 220 (221, 222) and 223 are arranged adjacent to the power storage element 210 on the side (Z-axis direction or X-axis direction) of the power storage element 210, and electrically insulate the power storage element 210 from other members. It is a flat plate-shaped and rectangular member. The spacers 220 and 223 are formed of, for example, any electrically insulating resin material that can be used for the exterior body 100.

Specifically, the spacer 221 is an intermediate spacer (inter-cell spacer) arranged in the Z-axis direction of the power storage element 210. That is, the spacer 221 is arranged between two adjacent power storage elements 210 (between the two first power storage elements 211 and between the two second power storage elements 212), and is between the two power storage elements 210. Is electrically insulated. In the present embodiment, three spacers 221 are arranged corresponding to the four first power storage elements 211, but when the number of the first power storage elements 211 is other than four, the number of spacers 221 is also increased. It is appropriately changed according to the number of the first power storage elements 211. The same applies to the second power storage element 212.

The spacer 222 is an end spacer arranged in the Z-axis direction of the power storage element 210 at the end. That is, the spacer 222 is arranged between the power storage element 210 at the end (first power storage element 211 and second power storage element 212 at the end) and the end plate 230 (231, 232), and the power storage element at the end. Electrically insulate between 210 and the end plate 230 (231, 232). That is, two spacers 222 are arranged on both sides of the four first storage elements 211 in the Z-axis direction, and two spacers 222 are arranged on both sides of the four second storage elements 212 in the Z-axis direction.

The spacer 223 is arranged between the power storage element 210 and the side plate 240 (241, 242, 243), and electrically insulates between the power storage element 210 and the side plate 240 (241, 242, 243). That is, two spacers 223 are arranged between the four first power storage elements 211 and the side plates 241 and 243 on both sides of the four first power storage elements 211 in the X-axis direction. Further, two spacers 223 are arranged between the four second power storage elements 212 and the side plates 242 and 243 on both sides of the four second power storage elements 212 in the X-axis direction.

The end plate 230 and the side plate 240 are members (constraining members) that press (constrain) the power storage element 210 from the outside in the Z-axis direction. That is, the end plate 230 and the side plate 240 press the respective power storage elements 210 and the plurality of spacers 220 from both sides in the Z-axis direction by sandwiching the plurality of power storage elements 210 and the plurality of spacers 220 from both sides in the Z-axis direction. (to restrict. The end plate 230 and the side plate 240 are made of metal members such as stainless steel, aluminum, aluminum alloy, iron, and galvanized steel sheet, but may be made of insulating members such as highly rigid resin. good.

The end plates 230 (231, 232) include a plurality of power storage elements 210 (plurality of first power storage elements 211 and a plurality of second power storage elements 212) and a plurality of storage elements 210 in the Z-axis direction (second direction intersecting the first direction). It is a pair of flat plate-shaped members that are arranged at positions that sandwich the spacer 220 of the above and sandwich these in the Z-axis direction. As a result, the pair of end plates 230 collectively constrain the plurality of storage elements 210 and the plurality of spacers 220 in the Z-axis direction (second direction) (the plurality of storage elements 210 and the plurality of spacers 220 in the Z-axis direction). The binding force in is given collectively). The end plate 231 is the end plate 230 on the Z-axis minus direction side of the pair of end plates 230, and the end plate 232 is the end plate 230 on the Z-axis plus direction side. A detailed description of the configuration of the end plate 230 (end plates 231 and 232) will be described later.

The side plates 240 (241, 242, 243) have a flat plate shape in which both ends are attached to a pair of end plates 230 and the pair of end plates 230 are connected to restrain a plurality of power storage elements 210 and a plurality of spacers 220. It is a member of. That is, the side plates 240 are arranged so as to extend in the Z-axis direction so as to straddle the plurality of power storage elements 210 and the plurality of spacers 220, and are arranged in these arrangement directions (Z-axis direction) with respect to the plurality of power storage elements 210 and the like. ) Is given a binding force.

In the present embodiment, the side plate 241 is arranged in the X-axis minus direction of the first power storage element 211, the side plate 242 is arranged in the X-axis plus direction of the second power storage element 212, and the first power storage element 211 and the second A side plate 243 is arranged between the power storage elements 212. Each of the side plates 241, 242, and 243 is attached to both ends and the center of the pair of end plates 230 in the X-axis direction at both ends in the Z-axis direction. The side plate 240 is formed with a through hole penetrating in the Y-axis direction for weight reduction and the like, but the through hole may not be formed.

In this way, the end plate 230 and the side plate 240 sandwich and restrain the plurality of power storage elements 210 and the plurality of spacers 220 from both sides in the X-axis direction and both sides in the Z-axis direction. Further, the end plates 230 (231 and 232) and the respective side plates 240 are connected (joined) to each other by a plurality of connecting members 230a (231a and 232a) arranged in the Y-axis direction. In the present embodiment, the connecting member 230a is a bolt, penetrates the end plate 230, and is screwed with the female screw portion formed on the side plate 240 to hold the end plate 230 and the side plate 240. Connect (conclude). The arrangement position and number of the connecting members 230a are not particularly limited. Further, the method of connecting the end plate 230 and the side plate 240 may be another method, for example, welding, caulking joining, adhesion, welding or the like.

The bus bar 250 is a flat plate-shaped member connected to the power storage element 210. Specifically, the bus bar 250 is arranged in the negative direction of the Y-axis of the plurality of power storage elements 210, and is connected (joined) to the electrode terminals of the plurality of power storage elements 210 and the bus bar 510. That is, the bus bar 250 connects the electrode terminals of the plurality of power storage elements 210 to each other, and also connects the electrode terminals of the power storage element 210 at the end to the bus bar 510. In the present embodiment, the bus bar 250 and the electrode terminals of the power storage element 210 are connected (joined) by welding, but may be connected (joined) by bolt fastening or the like. The bus bar 250 is made of, for example, any material that can be used for the bus bar 510. Further, in the present embodiment, in the bus bar 250, two power storage elements 210 are connected in parallel to form four sets of power storage element groups, and the four sets of power storage element groups are connected in series. May have all eight power storage elements 210 connected in series, or may have other configurations.

Further, an electric wire 251 for detecting voltage or the like is connected to the bus bar 250. The electric wire 251 is also connected to the electric device 400, and transmits information such as the voltage of the power storage element 210 to the electric device 400. The electric wire 251 is also connected to the thermistor 252, and the temperature information of the power storage element 210 is also transmitted to the electric device 400.

The bus bar frame 260 is a flat rectangular insulating member capable of electrically insulating the bus bar 250 from other members and restricting the position of the bus bar 250. The bus bar frame 260 is formed of, for example, any electrically insulating resin material that can be used for the exterior body 100. The bus bar frame 260 is arranged in the Y-axis minus direction (first direction) of the plurality of power storage elements 210, and is positioned with respect to the plurality of power storage elements 210. Further, the bus bar 250, the electric wire 251 and the thermistor 252 are positioned on the bus bar frame 260. As a result, the bus bar 250 is positioned with respect to the plurality of power storage elements 210 and is joined to the electrode terminals of the plurality of power storage elements 210.

Specifically, the bus bar frame 260 is attached to a plate member which is at least one end plate 230 of the pair of end plates 230. That is, the plate member refers to either one of the pair of end plates 230 (end plate 231 or end plate 232) or both of the pair of end plates 230, and the bus bar frame 260 is attached to the plate member. In the present embodiment, since the bus bar frame 260 is attached to both of the pair of end plates 230, the plate member indicates both of the pair of end plates 230. A detailed description of the configuration of the bus bar frame 260 will be described later.

[3 Explanation of configuration of power storage element 210]
Next, the configuration of the power storage element 210 will be described in detail. FIG. 5 is an exploded perspective view showing each component by disassembling the power storage element 210 according to the present embodiment. Specifically, FIG. 5 shows an exploded view of each part of the power storage element 210 shown in FIG. 4 in a vertically placed (standing) state. Since the eight power storage elements 210 (four first power storage elements 211 and four second power storage elements 212) all have the same configuration, the configuration of one power storage element 210 will be described below. ..

As shown in FIG. 5, the power storage element 210 includes a container 210a, a pair of electrode terminals 210b (positive electrode side and negative electrode side), and a pair of upper gaskets 210c (positive electrode side and negative electrode side). Further, a pair (positive electrode side and negative electrode side) lower gasket 210d, a pair (positive electrode side and negative electrode side) current collector 210e, and an electrode body 210f are housed inside the container 210a. An electrolytic solution (non-aqueous electrolyte) is sealed inside the container 210a, but the illustration is omitted. The type of the electrolytic solution is not particularly limited as long as it does not impair the performance of the power storage element 210, and various types can be selected. Further, in addition to the above components, even if a spacer arranged on the side or below of the electrode body 210f, an insulating film wrapping the electrode body 210f or the like, or an insulating sheet covering the outer surface of the container 210a is arranged. good.

The container 210a is a rectangular parallelepiped (square or box-shaped) case having a container body 210a1 having an opening formed therein and a container lid portion 210a2 for closing the opening of the container body 210a1. With such a configuration, the container 210a has a structure capable of sealing the inside by accommodating the electrode body 210f and the like inside the container body 210a1 and then welding the container body 210a1 and the container lid 210a2 or the like. It has become. The materials of the container body 210a1 and the container lid 210a2 are not particularly limited, but are preferably weldable metals such as stainless steel, aluminum, aluminum alloy, iron, and plated steel plate.

The container main body 210a1 is a rectangular cylindrical member having a bottom that constitutes the main body portion of the container 210a, and has an opening formed on the negative side of the Y-axis. That is, the container body 210a1 has a pair of rectangular and flat (flat) long side surfaces on both side surfaces in the Z-axis direction, and a pair of rectangular and flat (flat) side surfaces on both side surfaces in the X-axis direction. ) It has a short side surface and a rectangular and flat (flat) bottom surface on the positive side of the Y-axis. The container lid portion 210a2 is a rectangular plate-shaped member constituting the lid portion of the container 210a, and is arranged so as to extend in the Y-axis minus direction side of the container body 210a1 in the X-axis direction.

The electrode body 210f is a power storage element (power generation element) formed by laminating a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is a positive electrode active material layer formed on a positive electrode base material layer which is a current collecting foil made of a metal such as aluminum or an aluminum alloy. The negative electrode plate is a negative electrode active material layer formed on a negative electrode base material layer which is a current collecting foil made of a metal such as copper or a copper alloy. As the active material used for the positive electrode active material layer and the negative electrode active material layer, known materials can be appropriately used as long as they can occlude and release lithium ions. In the present embodiment, the electrode body 210f is formed by winding the electrode plate (positive electrode plate and negative electrode plate) around a winding axis (virtual axis parallel to the X-axis direction) extending in the X-axis direction. It is a type (so-called vertical winding type) electrode body.

Here, since the electrode plates (positive electrode plate and negative electrode plate) of the electrode body 210f are laminated in the Z-axis direction, the Z-axis direction is also referred to as a stacking direction. That is, the electrode body 210f is formed by laminating electrode plates in the laminating direction. The electrode body 210f has a pair of flat portions 210f1 arranged in the Z-axis direction and a pair of curved portions 210f2 arranged in the Y-axis direction by winding the electrode plate. The stacking direction is the stacking direction of the electrode plates in the flat portion 210f1. The flat portion 210f1 is a flat portion connecting the ends of the pair of curved portions 210f2, and the curved portion 210f2 is a portion curved in a semicircular shape or the like so as to project in the Y-axis direction. Further, the direction in which the flat surface of the flat portion 210f1 faces or the direction in which the pair of flat portions 210f1 face each other can be defined as the stacking direction. Therefore, it can be said that the plurality of first power storage elements 211 are lined up in the stacking direction, and it can be said that the plurality of second power storage elements 212 are also lined up in the stacking direction. Further, the X-axis direction in which the first power storage element 211 and the second power storage element 212 are arranged is also referred to as an arrangement direction. The stacking direction is an example of a second direction, and the arrangement direction is an example of a third direction intersecting the first direction and the second direction. That is, the first power storage element 211 and the second power storage element 212 are arranged in the arrangement direction (third direction) intersecting the stacking direction.

Further, in the electrode body 210f, the positive electrode plate and the negative electrode plate are wound so as to be displaced from each other in the X-axis direction. It has a portion (active material layer non-forming portion) where the base material layer is exposed without being (coated). That is, the electrode body 210f projects from the flat portion 210f1 and the curved portion 210f2 to both sides in the X-axis direction at both ends in the X-axis direction, and the active material layer non-forming portions of the positive electrode plate and the negative electrode plate are laminated to collect electricity. It has a connecting portion 210f3 connected to the body 210e.

The electrode body 210f is a so-called horizontal winding type electrode body formed by winding an electrode plate around a winding axis extending in the Y-axis direction, and a laminate formed by laminating a plurality of flat plate-shaped electrode plates. Any form of electrode body such as a type (stack type) electrode body or a bellows type electrode body in which an electrode plate is folded in a bellows shape may be used. In the case of the horizontal winding type electrode body, the flat part other than the curved part and the connection part (tab) with the current collector is the flat part, and in the case of the laminated type (stack type) and the bellows type electrode body, the flat part is the flat part. The flat part other than the connection part (tab) with the current collector is the flat part.

The electrode terminals 210b are terminals (positive electrode terminal and negative electrode terminal) of the power storage element 210, and are arranged on the container lid portion 210a2 so as to project in the negative direction (first direction) of the Y axis. The electrode terminal 210b is electrically connected to the positive electrode plate and the negative electrode plate of the electrode body 210f via the current collector 210e. The electrode terminal 210b is formed of a conductive member such as a metal such as aluminum, an aluminum alloy, copper, or a copper alloy.

The current collector 210e is a conductive member (positive electrode current collector and negative electrode current collector) that is electrically connected to the connection portion 210f3 of the electrode terminal 210b and the electrode body 210f. The current collector 210e is made of aluminum, an aluminum alloy, copper, a copper alloy, or the like. The upper gasket 210c and the lower gasket 210d are flat plate-shaped sealing members having electrical insulating properties, which are arranged between the container lid portion 210a2, the electrode terminal 210b, and the current collector 210e. The upper gasket 210c and the lower gasket 210d are formed of, for example, any electrically insulating resin material that can be used for the exterior body 100.

[4 Description of the configuration of the end plate 230 and the bus bar frame 260]
Next, the configurations of the end plate 230 (231, 232) and the bus bar frame 260 will be described in detail with reference to FIGS. 6 and 7 in addition to FIGS. 3 and 4. FIG. 6 is a perspective view showing the configuration of the bus bar frame 260 according to the present embodiment. Specifically, FIG. 6A is a perspective view showing a configuration in which the back surface (the surface on the Y-axis plus direction side) of the bus bar frame 260 shown in FIG. 3 is directed upward. 6 (b) and 6 (c) are enlarged perspective views showing the portion within the broken line in FIG. 6 (a) in an enlarged manner. FIG. 7 is a perspective view showing the configuration of the end plate 230 and the bus bar frame 260 according to the present embodiment. Specifically, FIG. 7A is a perspective view showing a configuration in which the front surface (the surface on the negative direction side of the Y-axis) of the power storage unit 200 shown in FIG. 2 is directed upward. 7 (b) and 7 (c) are enlarged perspective views showing the portion within the broken line in FIG. 7 (a) in an enlarged manner.

First, the configuration of the bus bar frame 260 will be described in detail. As shown in FIGS. 3, 6 and 7, the bus bar frame 260 includes a frame main body 261, a bus bar arranging portion 262, frame mounting portions 263 and 264, and an electric wire arranging portion 265. The bus bar frame 260 is an example of an insulating member, and the frame mounting portions 263 and 264 are examples of mounting portions of the insulating member.

The frame main body 261 is a flat plate-shaped and rectangular portion constituting the main body portion of the bus bar frame 260. The bus bar arranging portion 262 is a portion where the bus bar 250 is arranged and has a plurality of through holes. The through hole is formed in the frame body 261 at a position facing each electrode terminal 210b in order to connect (join) the bus bar 250 with the electrode terminal 210b of the power storage element 210, in the Y-axis direction of the frame body 261. It is a rectangular through hole that penetrates through. The electric wire arranging portion 265 is a portion where the electric wire 251 is arranged, and has a groove portion extending in the X-axis direction in which the electric wire 251 is accommodated.

The frame mounting portions 263 and 264 are projecting portions projecting from both ends in the Z-axis direction of the frame main body 261 in the positive direction of the Y-axis, and are mounted on a plate member which is at least one end plate 230 of the pair of end plates 230. Be done. The bus bar frame 260 has a plurality of frame mounting portions 263 and 264. In the present embodiment, the bus bar frame 260 has three frame mounting portions 263 and three frame mounting portions 264.

Specifically, one frame mounting portion 263 is arranged at the end of the frame body 261 in the X-axis minus direction and the Z-axis plus direction, and 1 is arranged at the end of the frame body 261 in the X-axis minus direction and the Z-axis minus direction. Two frame mounting portions 263 are arranged. Further, one frame mounting portion 263 is arranged at the end portion of the frame main body 261 on the X-axis minus direction side and the Z-axis minus direction from the center portion in the X-axis direction. Further, one frame mounting portion 264 is arranged at the end of the frame body 261 in the X-axis plus direction and the Z-axis plus direction, and one frame mounting portion is arranged at the end of the frame body 261 in the X-axis plus direction and the Z-axis minus direction. Section 264 is arranged. Further, one frame mounting portion 264 is arranged at the end portion of the frame main body 261 on the X-axis positive direction side and the Z-axis negative direction from the central portion in the X-axis direction.

In this way, since the frame mounting portions 263 and 264 are arranged so as to avoid the electric wire arranging portion 265, the number of the frame mounting portions 263 and 264 differs between the end portion in the Z-axis plus direction and the end portion in the Z-axis minus direction of the frame body 261. ing. Further, the three frame mounting portions 263 are arranged at positions corresponding to the first power storage element 211, and the three frame mounting portions 264 are arranged at positions corresponding to the second power storage element 212. Specifically, the frame mounting portion 263 is arranged at a position adjacent to the bus bar arranging portion 262 in which the bus bar 250 connected to the first power storage element 211 is arranged. Further, the frame mounting portion 264 is arranged at a position adjacent to the bus bar arranging portion 262 in which the bus bar 250 connected to the second power storage element 212 is arranged.

In other words, the frame mounting portion 263 is arranged in the Z-axis direction (second direction) of the bus bar 250 connected to the first power storage element 211 when viewed from the Y-axis direction (first direction). Further, the frame mounting portion 264 is arranged in the Z-axis direction (second direction) of the bus bar 250 connected to the second power storage element 212 when viewed from the Y-axis direction (first direction). The frame mounting portion 263 or 264 may be arranged at a position overlapping the bus bar 250 when viewed from the Z-axis direction, or may be arranged at a position slightly deviated from the bus bar 250 in the Y-axis direction.

Here, the frame mounting portions 263 and 264 are hook-shaped portions extending (protruding) along the XY plane. Specifically, the frame mounting portion 263 has a first protrusion 263a and a second protrusion 263b, and the frame mounting portion 264 has a first protrusion 264a and a second protrusion 264b. The first protrusions 263a and 264a are prismatic portions that project from the frame body 261 toward the end plate 230 (plate member) in the positive direction of the Y axis. That is, the first protrusions 263a and 264a on the Z-axis minus direction side project from the frame body 261 toward the end plate 231, and the first protrusions 263a and 264a on the Z-axis plus direction side protrude from the frame body 261 toward the end plate 232. Protrude toward.

The second protrusions 263b and 264b are portions of the first protrusions 263a and 264a that protrude in the X-axis direction (third direction) from the ends (tips) in the Y-axis plus direction. The second protrusions 263b and 264b have a substantially triangular prism shape (tapered shape) in which the width in the X-axis direction decreases toward the plus direction of the Y-axis. The second protrusions 263b and 264b are provided on all the frame mounting portions 263 and 264. That is, a plurality of second protrusions 263b and 264b are arranged corresponding to the plurality of frame mounting portions 263 and 264.

Specifically, the second protrusion 263b projects in the X-axis minus direction from the ends of the first protrusion 263a in the Y-axis plus direction and the X-axis minus direction. The second protrusion 264b projects in the X-axis plus direction from the ends of the first protrusion 264a in the Y-axis plus direction and the X-axis plus direction. That is, the second protrusions 263b and 264b project in opposite directions in the X-axis direction (third direction). As described above, the plurality of frame mounting portions 263 and 264 have at least two second protrusions 263b and 264b that project in opposite directions in the X-axis direction (third direction).

Next, the configuration of the end plate 230 (231, 232) will be described in detail. As shown in FIGS. 3, 4 and 7, in the end plate 230 (plate member), the plate openings 230c and 230d into which the frame mounting portions 263 and 264 are inserted are engaged with the frame mounting portions 263 and 264. It has a plate engaging portion 230e and a plate engaging portion 230e. The plate openings 230c and 230d are examples of openings into which the first protrusions are inserted, and the plate engaging portions 230e are examples of engaging portions that engage with the second protrusions.

Specifically, the end plate 231 has two plate openings 230c at positions corresponding to the two frame mounting portions 263 on the Z-axis minus direction side of the bus bar frame 260, and corresponds to the two frame mounting portions 264. It has two plate openings 230d at the positions where it is formed. Further, the end plate 231 has four plate engaging portions 230e at positions corresponding to the two frame mounting portions 263 and the two frame mounting portions 264. Further, the end plate 232 has one plate opening 230c at a position corresponding to one frame mounting portion 263 on the Z-axis plus direction side of the bus bar frame 260, and is located at a position corresponding to one frame mounting portion 264. It has one plate opening 230d. Further, the end plate 231 has two plate engaging portions 230e at positions corresponding to the one frame mounting portion 263 and the one frame mounting portion 264.

The plate openings 230c and 230d are recesses (notches) in which the ends of the end plate 230 in the minus direction of the Y axis penetrate in the direction of the Z axis and are recessed in the plus direction of the Y axis, and the frame mounting portions 263 and 264. Is inserted from the minus direction of the Y axis. The end plate 230 is thicker than the frame mounting portions 263 and 264 in the Z-axis direction. Therefore, the frame mounting portions 263 and 264 are arranged within the thickness of the end plate 230 without protruding from the plate openings 230c and 230d in the Z-axis direction. That is, the frame mounting portions 263 and 264 have a hook shape, but the first protrusions 263a and 264a and the second protrusions 263b and 264b are along the plane direction of the end plate 230 (231, 232). It is extended (protruding). As a result, the frame mounting portions 263 and 264 can be accommodated within the thickness of the end plate 230 (231, 232) even if they have a hook shape.

Specifically, the first protrusions 263a and 264a and the second protrusions 263b and 264b of the frame mounting portions 263 and 264 are inserted into the plate openings 230c and 230d. That is, the plate opening 230c is an L-shaped recess (notch) that extends from the end edge of the end plate 230 in the minus direction of the Y axis in the plus direction of the Y axis and is bent in the minus direction of the X axis. Then, the first protrusion 263a is arranged at the portion of the plate opening 230c extending in the positive direction of the Y axis, and the second protrusion 263b is arranged at the portion of the plate opening 230c bent in the negative direction of the X axis. Similarly, the plate opening 230d is an L-shaped recess (notch) extending from the end edge of the end plate 230 in the minus direction of the Y axis in the plus direction of the Y axis and bent in the plus direction of the X axis. Then, the first protrusion 264a is arranged at the portion of the plate opening 230d extending in the Y-axis plus direction, and the second protrusion 264b is arranged at the portion of the plate opening 230d bent in the X-axis plus direction.

With such a configuration, the plate engaging portion 230e is arranged in the Y-axis minus direction of the second protrusions 263b and 264b. Specifically, the plate engaging portion 230e formed by the plate opening 230c is arranged in the X-axis minus direction of the first protrusion 263a and in the Y-axis minus direction of the second protrusion 263b. Similarly, the plate engaging portion 230e formed by the plate opening 230d is arranged in the X-axis positive direction of the first protrusion 264a and in the Y-axis negative direction of the second protrusion 264b. As a result, the plate engaging portion 230e engages with the second protrusions 263b and 264b in the Y-axis direction (first direction).

[5 Explanation of effect]
As described above, according to the power storage device 10 according to the embodiment of the present invention, the insulating member (bus bar frame 260) is arranged in the first direction (Y-axis minus direction, electrode terminal 210b side) of the power storage element 210. ing. Then, the insulating member has frame mounting portions 263 and 264 attached to the plate member which is at least one end plate 230 of the pair of end plates 230 sandwiching the power storage element 210 in the second direction (Z-axis direction). doing. In this way, by attaching the insulating member to at least one end plate 230 of the pair of end plates 230, the insulating member can be easily attached to the power storage element 210. The insulating member may be firmly attached to the plate member, or the insulating member may be simply attached to the plate member as a temporary fixing until the bus bar 250 is joined to the power storage element 210. good.

Further, in the power storage device 10, the pair of end plates 230 are positioned so as to sandwich a plurality of power storage elements 210 (first power storage element 211 and second power storage element 212) arranged in the third direction (X-axis direction) in the second direction. Be placed. As described above, when the plurality of power storage elements 210 are arranged in the third direction, the length of the pair of end plates 230 sandwiching the plurality of power storage elements 210 in the second direction becomes long in the third direction. As a result, the length of the side of the end plate 230 facing the insulating member becomes longer, which makes it easier to attach the insulating member to the end plate 230. Therefore, the insulating member can be easily attached to the power storage element 210. Can be done.

Further, the frame mounting portions 263 and 264 of the insulating member have first protrusions 263a and 264a, and the plate member has plate openings 230c and 230d into which the first protrusions 263a and 264a are inserted. .. By inserting the first protrusions 263a and 264a of the frame mounting portions 263 and 264 into the plate openings 230c and 230d of the plate member in this way, the insulating member can be mounted on the plate member with a simple configuration. As a result, the insulating member can be easily attached to the power storage element 210.

Further, when the insulating member is attached to the power storage element 210, it is not necessary to provide a fastening member such as a bolt, so that the number of parts can be reduced, the weight can be reduced, and the space can be saved. In particular, it is possible to reduce problems such as bolts sticking into the power storage element 210 when the power storage device 10 is deformed due to a crash or the like. In addition, there are problems when the insulating member is attached to the power storage element 210 by joining such as heat caulking (a special tool is required, or when an assembly failure occurs, it cannot be removed and reassembled, etc.) ) Can also be resolved.

Further, the frame mounting portions 263 and 264 have second protrusions 263b and 264b protruding in the third direction from the first protrusions 263a and 264a, and the plate member engages with the second protrusions 263b and 264b in the first direction. It has a plate engaging portion 230e to be formed. By engaging the second protrusions 263b and 264b of the frame mounting portions 263 and 264 with the plate engaging portion 230e of the plate member in this way, the insulating member can be attached to the plate member with a simple configuration. As a result, the insulating member can be easily attached to the power storage element 210.

Further, at least two second protrusions 263b and 264b that project in opposite directions in the third direction are arranged corresponding to the plurality of frame mounting portions 263 and 264. That is, at least two second protrusions 263b and 264b of the frame mounting portions 263 and 264 project in opposite directions in the third direction. Therefore, when the insulating member is displaced in the third direction with respect to the plate member, even if one second protrusion (for example, the second protrusion 263b) is disengaged from the plate engaging portion 230e, the other second protrusion (for example) For example, the state in which the second protrusion 264b) is engaged with the plate engaging portion 230e can be maintained. As a result, the insulating member can be made difficult to come off from the plate member with a simple configuration, so that the insulating member can be easily attached to the power storage element 210 in a state where it is hard to come off.

Further, the frame mounting portions 263 and 264 are arranged on the side (second direction) of the bus bar 250. As a result, the insulating member is attached to the power storage element 210 on the side of the bus bar 250, so that the position of the insulating member with respect to the bus bar 250 is prevented from shifting and the insulating member is prevented from floating on the side of the bus bar 250. Can be done. Therefore, when the bus bar 250 is connected to the electrode terminal 210b of the power storage element 210, problems such as the insulating member becoming an obstacle can be suppressed.

[Explanation of 6 modified examples]
Although the power storage device 10 according to the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. That is, the embodiments disclosed this time are exemplary and not restrictive in all respects, and the scope of the present invention is indicated by the claims and has the same meaning and scope as the claims. Includes all changes within.

For example, in the above embodiment, the power storage unit 200 has a plurality of power storage elements 210 (first power storage element 211 and second power storage element 212) arranged in the third direction (X-axis direction). bottom. However, the power storage elements 210 do not have to be arranged in the third direction. That is, the power storage unit 200 may have only a plurality of power storage elements 210 arranged in the second direction (Z-axis direction) or one power storage element 210.

Further, in the above embodiment, the bus bar frame 260 is exemplified as an example of the insulating member arranged in the first direction (Y-axis minus direction) of the power storage element 210. However, the insulating member may be a wiring frame in which wiring such as the electric wire 251 is arranged without arranging the bus bar 250, or may be another insulating member.

Further, in the above embodiment, the plate members are both of the pair of end plates 230, and the insulating members are attached to both of the pair of end plates 230. However, the plate member may be any one of the pair of end plates 230 (end plate 231 or end plate 232), and the insulating member may be attached only to the one end plate 230.

Further, in the above embodiment, the frame mounting portion 263 is arranged in the second direction (Z-axis direction) of the bus bar 250 when viewed from the first direction (Y-axis direction). However, even if the frame mounting portion 263 is arranged at a position deviated from the second direction (Z-axis direction) of the bus bar 250 (for example, a position deviated from the X-axis direction) when viewed from the first direction (Y-axis direction). good. That is, the arrangement position of the frame mounting portion 263 is not particularly limited. The number of frame mounting portions 263 is also not particularly limited. The same applies to the frame mounting portion 264.

Further, in the above embodiment, the frame mounting portion 263 has the first protrusion 263a and the second protrusion 263b, and the plate member has the plate opening 230c and the plate engaging portion 230e. However, the plate member may have protrusions such as a first protrusion and a second protrusion, and the frame mounting portion 263 may have an opening and an engagement portion into which the protrusions are inserted and engaged. .. That is, one of the frame mounting portion 263 and the plate member has a first protrusion and a second protrusion protruding toward the other, and the other engages with the opening and the second protrusion into which the first protrusion is inserted. It suffices to have an engaging portion to be engaged. The same applies to the frame mounting portion 264.

Further, in the above embodiment, the second protrusions 263b and 264b are supposed to protrude in opposite directions, but they may protrude in the same direction.

Further, in the above embodiment, the frame mounting portion 263 does not have the second protrusion 263b, or the plate member does not have the plate engaging portion 230e, so that the frame mounting portion 263 is engaged with the plate member. The configuration may not match. For example, the frame mounting portion 263 may be mounted on the plate member by fitting or press-fitting the first protrusion 263a into the plate opening 230c. That is, the insulating member may be attached to the plate member so as to prevent it from coming off. The same applies to the frame mounting portion 264.

Further, in the above embodiment, the frame mounting portion 263 is not inserted into the plate member because the frame mounting portion 263 does not have the first protrusion 263a or the plate member does not have the plate opening 230c. It may be configured. For example, the insulating member may be attached to the plate member by bolting, bonding, welding, welding, caulking, or the like.

Further, in the above embodiment, the frame mounting portion 263 of the plurality of frame mounting portions 263 does not have to have the above configuration, or any one of the plurality of frame mounting portions 264. The frame mounting portion 264 does not have to have the above configuration. The same applies to the plate openings 230c and 230d.

Further, the power storage device 10 does not need to include all the above-mentioned components. For example, the power storage device 10 may not include a spacer 220, 223, a thermistor 252, a mounting member 300, an electric device 400, a relay 520, or the like.

Further, a form constructed by arbitrarily combining the components included in the above-described embodiment and its modifications is also included in the scope of the present invention.

Further, the present invention can be realized not only as a power storage device 10, but also as a combination of the insulating member and the plate member.

The present invention can be applied to a power storage device including a power storage element such as a lithium ion secondary battery.

10 Power storage device 100 Exterior 200 Power storage unit 210 Power storage element 210a Container 210b Electrode terminal 210e Current collector 210f Electrode body 211 First power storage element 212 Second power storage element 230, 231, 232 End plate 230c, 230d Plate opening 230e Plate Joint part 240, 241, 242, 243 Side plate 250, 510 Bus bar 251 Electric wire 260 Bus bar frame 261 Frame body 262 Bus bar arrangement part 263, 264 Frame mounting part 263a, 264a First protrusion 263b, 264b Second protrusion 265 Electric wire arrangement part

Claims (6)

A power storage element having an electrode terminal protruding in the first direction,
A pair of end plates arranged at positions sandwiching the power storage element in the second direction intersecting the first direction,
An insulating member arranged in the first direction of the power storage element is provided.
The insulating member is a power storage device having a mounting portion attached to a plate member which is at least one end plate of the pair of end plates. The power storage device includes a plurality of the power storage elements arranged in the first direction and the third direction intersecting the second direction.
The power storage device according to claim 1, wherein the pair of end plates are arranged at positions sandwiching the plurality of power storage elements in a second direction. The power storage device according to claim 1 or 2, wherein one of the mounting portion and the plate member has a first protrusion protruding toward the other, and the other has an opening into which the first protrusion is inserted. .. One of the above further has a second protrusion protruding from the first protrusion in the first direction and a third direction intersecting the second direction.
The power storage device according to claim 3, wherein the other is an engaging portion that engages with a second protrusion in the first direction. The insulating member has a plurality of the mounting portions.
A plurality of the second protrusions are arranged corresponding to the plurality of mounting portions.
The power storage device according to claim 4, wherein the plurality of second protrusions have at least two second protrusions protruding in opposite directions in the third direction. Further, a bus bar connected to the electrode terminal is provided.
The power storage device according to any one of claims 1 to 5, wherein the mounting portion is arranged in the second direction of the bus bar when viewed from the first direction.

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