JP6603556B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including a power storage element.

  Since an electric vehicle or a hybrid electric vehicle requires a power source with a large capacity, a battery block including a plurality of battery cells is used.

  This type of battery block includes a plurality of battery cells arranged in a first direction, a plurality of separators inserted between adjacent battery cells, and a pair of ends sandwiching the plurality of battery cells and the plurality of separators in the first direction. A plate, and a bind bar fixed to each of the pair of end plates and contacting each of the plurality of separators.

  Each of the plurality of separators forms a ventilation gap for allowing a cooling fluid to flow between adjacent battery cells. Therefore, the said battery block is comprised so that each of several battery cells can be cooled by allowing the cooling fluid sent in the circumference | surroundings of the said battery block to pass through each ventilation space (for example, refer patent document 1). ).

  By the way, in the battery block, for example, a gap may be generated between the bind bar and the separator when the bind bar bends during assembly or use. In such a case, a part of the cooling fluid sent around the battery block passes through the gap between the separator and the bind bar. Therefore, in the battery block, the flow rate of the cooling fluid entering each air gap is reduced, and the cooling performance of the plurality of battery cells may be lowered.

JP 2010-287550 A

  Then, an object of this invention is to provide the electrical storage apparatus which can suppress that the fluid for cooling which flows through a ventilation path reduces in view of the said problem.

The power storage device according to the present invention includes:
A storage element;
A spacer disposed adjacent to the storage element in the first direction;
A holding member for holding the power storage element and the spacer;
An insulator disposed between the spacer and the holding member,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator is
A first insulating portion disposed between the holding member and the extended portion of the spacer in a state in contact with the holding member;
A first seal portion extending from the first insulating portion and abutting on the extension portion.

  According to this configuration, the first insulating portion of the insulator is in contact with the holding member, and the first seal portion continuous with the first insulating portion is in contact with the extension portion of the spacer. Therefore, in the power storage device, the cooling fluid that is about to flow between the holding member and the extended portion of the spacer can be blocked by the first insulating portion of the insulator and the first seal portion of the insulator.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member and the extended portion of the spacer can be circulated through each ventilation path. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

in this case,
The extending portion includes a contacted surface that contacts the first seal portion,
The first seal portion extends from the first insulating portion in a direction inclined with respect to the contacted surface.
You may do it.

  Even in this case, the first insulating portion of the insulator is in contact with the holding member, and the first seal portion continuous with the first insulating portion is in contact with the extending portion of the spacer. Therefore, in the power storage device, the cooling fluid that is about to flow between the holding member and the extended portion of the spacer can be blocked by the first insulating portion of the insulator and the first seal portion of the insulator.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member and the extended portion of the spacer can be circulated through each ventilation path. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

in this case,
The first seal part has elasticity and lower rigidity than the contacted surface,
You may do it.

  If it does in this way, the 1st seal part will be elastically deformed by contacting the contacted surface of the extension part. Thereby, an elastic force is generated in the first seal portion, and the first seal portion is difficult to be separated from the contacted surface. As a result, in the power storage device, the fluid that flows between the holding member and the extended portion of the spacer is more reliably blocked.

In the present invention,
The first seal portion of the insulator is
Extending in the second direction and contacting the contacted surface,
The contacted surface is inclined with respect to a direction in which the first seal portion extends;
You may do it.

  In this case, the first seal portion extending in the second direction is in contact with the contacted surface in an inclined state, so that the first seal portion is elastically deformed. Thus, in the power storage device, an elastic force can be generated in the first seal portion so that the first seal portion can hardly be separated from the contacted surface. Therefore, in the power storage device, the fluid that flows between the holding member and the extended portion of the spacer is more reliably blocked.

In the present invention,
The extending portion extends from each of both ends of the base in a third direction orthogonal to the first direction and the second direction,
The insulator has a pair of the first seal portions,
One first seal portion abuts on an extension formed at one end of the base in the third direction,
The other first seal portion is in contact with an extending portion formed at the other end of the base in the third direction.
You may do it.

  According to this configuration, in the power storage device, the fluid that tries to flow between the extending portions at both ends of the base in the third direction and the holding member is caused by the first insulating portion and the first sealing portion. Can be blocked. That is, in the power storage device, the fluid that is about to flow between the holding member and the spacer at both ends in the third direction can be blocked by the first insulating portion and the first seal portion.

  Therefore, in the power storage device, the fluid that is about to flow between each of the extending portions at both ends of the base in the third direction and the holding member can be circulated through each ventilation path. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

In the present invention,
A first seal portion of the insulator extends in a direction inclined with respect to the second direction and contacts the contacted surface;
The contacted surface extends in the first direction and a third direction orthogonal to the first direction and the second direction,
You may do it.

  Even in this case, the first seal portion extending in the direction inclined with respect to the second direction is brought into contact with the contacted surface in an inclined state, and the first seal portion is elastically deformed. Can be made. Therefore, in the power storage device, it is possible to make the first seal portion difficult to separate from the contacted surface by generating an elastic force in the first seal portion. Therefore, in the power storage device, the fluid that flows between the holding member and the extended portion of the spacer is more reliably blocked.

In the present invention,
A plurality of power storage elements aligned in the first direction;
A plurality of spacers arranged adjacent to the plurality of power storage elements, and
Each of the plurality of spacers is
A base that forms a ventilation path between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The first seal portion is a protrusion that contacts each of the extending portions.
You may do it.

  According to this configuration, in the power storage device, the cooling fluid that is about to flow between the holding member and the extended portions of the plurality of spacers is connected to the extended portions of the plurality of spacers and the first seal. Blocked by the part.

  Therefore, in the power storage device, a fluid that is about to flow between the holding member and each of the extending portions of the plurality of spacers can be circulated through each ventilation path. Therefore, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

in this case,
Among the plurality of spacers, the spacer disposed at the end in the first direction is a pair of extensions extending from both ends of the base in the third direction orthogonal to the first direction and the second direction. Having connecting edges connecting the parts,
The insulator is
A second insulating portion disposed between the holding member and a connection side of a spacer disposed at the end portion in a state of being in contact with the holding member;
A second seal portion extending from the second insulating portion, the second seal portion abutting against a connection side of a spacer disposed at the end,
The second seal portion is continuous with the first seal portion;
You may do it.

  According to this configuration, in the power storage device, the fluid that tries to flow between the connection side of the spacer disposed at the end portion in the first direction and the holding member is the second insulating portion and the second seal portion. And is blocked by. That is, in the power storage device, the fluid that is about to flow between the holding member and the spacer is blocked by the second insulating portion and the second seal portion at both ends in the first direction.

  Therefore, in addition to the fluid that is about to flow between the holding member and each of the extended portions of the plurality of spacers, the power storage device is provided between the connection sides of the spacers arranged at both ends and the holding member. The fluid to flow in can also be circulated through each ventilation path. Thereby, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be more reliably suppressed.

in this case,
The holding member has a frame that is long in the first direction;
The frame has a connection portion arranged to be adjacent to each of the extension portions of the plurality of spacers with the first seal portion of the insulator interposed therebetween,
The connecting portion of the frame is curved so that a central portion in the first direction is convex toward the insulator.
You may do it.

  In this way, the central portion of the insulator in the first direction is firmly sandwiched between the central portion of the connecting portion and the extension portion of the spacer in the first direction.

  That is, the central portion of the first insulating portion of the insulator in the first direction is more strongly pressed against the connection portion of the frame, and the central portion of the first seal portion in the first direction is the extended portion of the spacer. Is more strongly pressed.

  As described above, in the power storage device, the connection portion of the frame is bent, so that the first insulating portion is separated from the connection portion of the frame, or the first seal portion is separated from the contacted surface of the extension portion. Can be prevented more reliably.

  Accordingly, in the power storage device, the fluid that is about to flow between the holding member and each of the extending portions of the plurality of spacers is more reliably generated by the first insulating portion of the insulator and the first seal portion of the insulator. Blocked by. Therefore, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be more reliably suppressed.

In the present invention,
The contacted surface of the extension part is
A first abutted surface;
Including the first abutted surface and the second abutted surface arranged in the third direction,
The first seal portion is
A seal portion in contact with the first contacted surface;
A seal portion that contacts the second contacted surface,
You may do it.

  In this way, the cooling fluid which is about to flow between the holding member and the extended portion of the spacer is contacted with the portion where the first contact surface and the seal portion are in contact with each other, It can block | interrupt with the part which a contact surface and a seal | sticker part contact. Therefore, in the power storage device, the fluid that flows between the holding member and the extended portion of the spacer is more reliably blocked. Therefore, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be more reliably suppressed.

in this case,
The first abutted surface is disposed at a position closer to the ventilation path than the second abutted surface, and the protruding length of the seal portion that contacts the first abutted surface is the first Larger than the protruding length of the seal portion that contacts the second contacted surface,
You may do it.

  If it does in this way, it will become easy to stick a seal part to the 1st contacted surface arrange | positioned in the position near a ventilation path rather than a 2nd contacted surface. Therefore, in the power storage device, the fluid that flows between the holding member and the extended portion of the spacer can be blocked more reliably, and the cooling fluid flowing through the ventilation path can be more reliably reduced. It can be suppressed.

Another power storage device according to the present invention is:
A storage element;
A spacer disposed adjacent to the power storage element in the first direction;
A holding member that holds the power storage element and the spacer;
An insulator disposed between the spacer and the holding member,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
A pair of extending portions extending in the first direction from the base and extending from both ends of the third direction orthogonal to the first direction and the second direction;
A connecting side connecting the pair of extending portions,
The insulator is
An insulating portion disposed between the holding member and a connection side of the spacer in a state of being in contact with the holding member;
And a seal portion that extends from the insulating portion and contacts the connection side.

  According to this configuration, the insulating portion of the insulator is in contact with the holding member, and the seal portion continuous with the insulating portion is in contact with the connecting piece of the spacer. Therefore, in the power storage device, the cooling fluid that is about to flow between the holding member and the connection side of the spacer can be blocked by the insulating portion of the insulator and the sealing portion of the insulator.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member and the connection side of the spacer can be circulated through each ventilation path. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

Another power storage device according to the present invention is as follows.
A storage element;
A spacer disposed adjacent to the power storage element in the first direction;
A holding member that holds the power storage element and the spacer;
An insulator disposed between the spacer and the holding member,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator has an insulating portion disposed between the holding member and the extending portion in a state of being in contact with the holding member,
The extension portion has a seal portion that comes into contact with the insulating member.

  According to this configuration, the insulating portion of the insulator is in contact with the holding member and is in contact with the seal portion of the extended portion of the spacer. Therefore, in the power storage device, the cooling fluid that is about to flow between the holding member and the extended portion of the spacer can be blocked by the insulating portion of the insulator.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member and the extended portion of the spacer can be circulated through each ventilation path. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation path can be suppressed.

Another power storage device according to the present invention is as follows.
A storage element;
A spacer disposed adjacent to the power storage element in the first direction;
A holding member that holds the power storage element and the spacer;
An insulator disposed between the spacer and the holding member;
A seal member disposed between the spacer and the insulator,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator has an insulating portion disposed between the holding member and the extending portion in a state of being in contact with the holding member,
The seal member is sandwiched between the extension portion and the insulating portion.

  According to this configuration, the seal member contacts the insulating portion of the insulator and also contacts the extended portion of the spacer. Therefore, in the power storage device, the cooling fluid that is about to flow between the extended portion of the spacer and the insulator can be blocked by the seal member.

  As mentioned above, according to this invention, the electrical storage apparatus which can suppress that the fluid for cooling which flows through a ventilation path can be suppressed can be provided.

FIG. 1 is a perspective view of a power storage device according to an embodiment of the present invention. FIG. 2 is a side view of the power storage device according to the embodiment. FIG. 3 is a perspective view of a power storage element according to the power storage device according to the embodiment. FIG. 4 is a front view of the power storage element according to the power storage device according to the embodiment. FIG. 5 is an exploded perspective view in a state where a part of the configuration of the power storage device according to the embodiment is omitted. FIG. 6 is a perspective view of the inner spacer, the outer spacer, and the power storage element of the power storage device according to the embodiment. FIG. 7 is a perspective view of the internal spacer, one external spacer, and the electrical storage element of the electrical storage device according to the embodiment. FIG. 8 is a perspective view of the internal spacer, the other external spacer, and the electrical storage element of the electrical storage device according to the embodiment. FIG. 9 is a cross-sectional view of the power storage device according to the embodiment, and is a cross-sectional view of the power storage device to which a duct is attached. FIG. 10 is a cross-sectional view of the power storage device according to the embodiment, and is a cross-sectional view taken along line XX in FIG. 5. 11 is a cross-sectional view of the power storage device according to the embodiment, and is a cross-sectional view taken along line XI-XI in FIG. 5. 12 is a cross-sectional view of the power storage device according to the embodiment, and is a cross-sectional view taken along line XII-XII in FIG. 5.

  Hereinafter, an embodiment of a power storage device of the present invention will be described with reference to the drawings. In addition, the name of each structural member of this embodiment is in this embodiment, and may differ from the name of each structural member in background art.

  As shown in FIG. 1, the power storage device includes a power storage element 1, a spacer 2 adjacent to the power storage element 1, and a holding member 3 that holds the power storage element 1 and the spacer 2 together. The holding member 3 is formed of a conductive material. Accordingly, the power storage device includes an insulator 4 disposed between the power storage element 1 and the holding member 3.

  As shown in FIGS. 3 and 4, the storage element 1 includes an electrode body including a positive electrode and a negative electrode, a case 10 that houses the electrode body, and a pair of external terminals 11 that are disposed on the outer surface of the case 10. .

  The case 10 includes a case main body 100 having an opening, and a cover plate 101 that closes the opening of the case main body 100, and a pair of external terminals 11 are disposed on the outer surface.

  The case main body 100 includes a closing part 100a (see FIG. 4) and a cylindrical body part 100b connected to the periphery of the closing part 100a so as to surround the closing part 100a.

  The trunk portion 100b includes a pair of first walls 100c that face each other with a space therebetween, and a pair of second walls 100d that face each other across the pair of first walls 100c.

  Each of the first wall 100c and the second wall 100d is formed in a rectangular shape. That is, each surface of the first wall 100c and the second wall 100d is a flat surface and is a quadrangular region. The first wall 100c and the second wall 100d are arranged adjacent to each other with their edges abutted against each other. In connection with this, the edge of the adjacent 1st wall 100c and the edge of the 2nd wall 100d are connected over the full length. Thereby, the trunk | drum 100b is formed in the square cylinder shape. One end of the trunk portion 100b is closed by the closing portion 100a. On the other hand, the other end of the trunk portion 100 b is opened and closed by the lid plate 101.

  In the present embodiment, the surface area of the first wall 100c is larger than the surface area of the second wall 100d. Accordingly, the body 100b is formed in a flat rectangular tube shape.

  The power storage device according to the present embodiment includes a plurality of power storage elements 1. Each of the plurality of power storage elements 1 is aligned in one direction. In the present embodiment, each of the plurality of power storage elements 1 is aligned with the first wall 100c of the case 10 oriented in one direction. The power storage device includes a bus bar that electrically connects the external terminals 11 of two adjacent power storage elements 1.

  In the following description, for convenience, the direction (first direction) in which the power storage elements 1 are aligned is referred to as the X-axis direction. In addition, one direction (second direction) of the two axial directions orthogonal to the direction in which the storage elements 1 are aligned (X-axis direction) is referred to as the Y-axis direction, and the remaining one direction (third direction) is the Z-direction. It shall be the axial direction. Accordingly, in each drawing, three orthogonal axes (coordinate axes) corresponding to the X-axis direction, the Y-axis direction, and the Z-axis direction are supplementarily illustrated.

  The spacer 2 has an insulating property. Spacer 2 has a base adjacent to case 10 (first wall 100c of body portion 100b) of power storage element 1, and a restricting portion that prevents displacement of power storage element 1 adjacent to the base. The spacer 2 has an extending portion that extends from the base in the X-axis direction.

  The spacer 2 can be made of a material such as polypropylene, polyphenylene sulfide, or polybutylene terephthalate. These materials preferably contain fibers such as glass fibers or aramid fibers so that the rigidity is increased. The spacer 2 which concerns on this embodiment is comprised by the polypropylene containing glass fiber.

  The spacer 2 will be described more specifically. The power storage device includes a plurality of power storage elements 1 as described above. Accordingly, the power storage device includes a plurality of spacers 2 that are arranged so as to be adjacent to the power storage element 1 in the X-axis direction. In addition, the power storage device includes two types of spacers 2 (2A, 2B) as shown in FIG. That is, the power storage device includes, as spacers 2, a spacer (hereinafter referred to as an internal spacer) 2 </ b> A disposed between two power storage elements 1 and a spacer adjacent to the power storage element 1 at the end of the plurality of power storage elements 1. 2B (hereinafter referred to as an external spacer).

  First, the inner spacer 2A will be described. As shown in FIG. 6, the inner spacer 2 </ b> A is a restriction that prevents displacement of the base 20 </ b> A adjacent to the power storage element 1 (the first wall 100 c of the case body 100) and the two power storage elements 1 adjacent to the base 20 </ b> A. Part 21A. Furthermore, the inner spacer 2A has an extending portion 22A that extends from the base 20A in the X-axis direction (see FIG. 6).

  The base 20 </ b> A of the inner spacer 2 </ b> A is sandwiched between the two power storage elements 1. Therefore, the base 20A of the inner spacer 2A is a first surface facing one of the two adjacent power storage devices 1 and a second surface opposite to the first surface, It has the 2nd surface which opposes the other electrical storage element 1 among the two electrical storage elements 1. FIG.

  The base 20 </ b> A of the inner spacer 2 </ b> A is a first end disposed at a position corresponding to the cover plate 101 of the electricity storage device 1, and a second end opposite to the first end, and is a closed portion of the electricity storage device 1. And a second end disposed at a position corresponding to 100a. The base 20A of the inner spacer 2A is a third end disposed at a position corresponding to one second wall 100d of the power storage element 1, and a fourth end opposite to the third end. And a fourth end disposed at a position corresponding to the other second wall 100d of the element 1.

  The base 20A of the inner spacer 2A has a first corner portion that is a portion where the first end and the third end of the base 20A are connected, and a second portion where the first end and the fourth end are connected. With corners. Further, the base 20A of the inner spacer 2A has a fourth triangular portion which is a portion where the second end and the fourth end are connected to each other, and a second triangular portion which is a portion where the second end and the third end are connected. Part.

  Note that the first end and the second end of the base 20A of the inner spacer 2A extend in the Y-axis direction. The third end and the fourth end of the base 20A of the inner spacer 2A extend in the Z-axis direction. Therefore, the base 20A of the inner spacer 2A is formed in a substantially rectangular shape. In addition, the base 20 </ b> A of the inner spacer 2 </ b> A is formed with a size approximately the same as the first wall 100 c of the electricity storage device 1.

  In the power storage device according to the present embodiment, between at least one of the first surface of the base 20A of the inner spacer 2A and the power storage element 1 and between the second surface of the base 20A of the inner spacer 2A and the power storage element 1. Is formed with an air passage 23A for allowing fluid (cooling fluid) to pass therethrough. That is, the base 20A of the inner spacer 2A forms the ventilation path 23A between the power storage elements 1 adjacent in the X-axis direction (in the present embodiment, between each power storage element 1 adjacent in the X-axis direction). .

  This will be described more specifically. In the electricity storage device 1 according to the present embodiment, the base 20A of the inner spacer 2A is formed in a rectangular wave shape. The base 20 </ b> A of the inner spacer 2 </ b> A includes a first contact portion 200 </ b> A that contacts only one of the two adjacent power storage elements 1 and the other power storage element 1 of the two adjacent power storage elements 1. 2nd contact part 201A which contacts only. Accordingly, the base 20A of the inner spacer 2A has a continuous portion 202A connected to the first contact portion 200A and the second contact portion 201A.

  The first contact portion 200A is long in the Y-axis direction. The second contact portion 201A is long in the Y-axis direction.

  The base 20A of the inner spacer 2A has a plurality of first contact portions 200A and a plurality of second contact portions 201A. The first contact portions 200A and the second contact portions 201A are alternately arranged in the direction in which the first end and the second end of the base 20A of the inner spacer 2A are arranged.

  Thus, in the power storage device, the ventilation path 23A is formed by the surface of the first contact portion 200A opposite to the surface that contacts the power storage element 1 and the pair of connecting portions 202A connected to the first contact portion 200A. It is formed. Further, in the power storage device, the air passage 23A is formed by the surface of the second contact portion 201A opposite to the surface that contacts the power storage element 1 and the pair of connecting portions 202A connected to the second contact portion 201A. Is done. Therefore, in the power storage device, ventilation paths 23A are formed between the first surface of the base 20A of the inner spacer 2A and the power storage element 1, and between the second surface of the base 20A of the inner spacer 2A and the power storage element 1, respectively. Is done.

  Accordingly, in the power storage device, the base 20A of the inner spacer 2A forms a ventilation path 23A that communicates both ends in the Y-axis direction. Therefore, in the power storage device, the cooling fluid sent to the periphery flows from one end to the other end in the Y-axis direction through the ventilation path 23A (the ventilation path 23A formed by the base 20A of the internal spacer 2A).

  As shown in FIG. 9, the power storage device according to the present embodiment is disposed on each of one side of the plurality of power storage elements 1 in the Y-axis direction and the other side of the plurality of power storage elements 1 in the Y-axis direction. The duct 5 is further provided.

  Therefore, one duct 5 is arranged at a position adjacent to one end in the Y-axis direction of each of the plurality of ventilation paths 23A. The other duct 5 is disposed at a position adjacent to the other end in the Y-axis direction of each of the plurality of ventilation paths 23A.

  Further, an intake fan (not shown) is connected to one duct 5. Therefore, in the power storage device, the cooling fluid sucked into one duct 5 by the intake fan flows from one end to the other end of the ventilation path 23 </ b> A in the Y-axis direction and is discharged from the other duct 5. ing.

  As described above, the inner spacer 2 </ b> A is disposed between two adjacent power storage elements 1. Therefore, as shown in FIG. 6, the restricting portion 21 </ b> A includes the power storage element 1 adjacent to the first surface of the base 20 </ b> A of the inner spacer 2 </ b> A to restrict the relative movement of the two power storage elements 1 adjacent to the inner spacer 2 </ b> A , And extends toward the power storage element 1 adjacent to the second surface of the base 20A of the inner spacer 2A.

  This will be described more specifically. The restricting portion 21A is formed at each corner of the base 20A of the inner spacer 2A. The inner spacer 2A includes, as the restricting portion 21A, a first restricting portion 210A formed at the first corner, a second restricting portion 211A formed at the second corner, and a third restriction formed at the third triangular portion. 212A and a fourth restricting portion 213A formed at the fourth corner.

  The first restricting portion 210A and the second restricting portion 211A are directed to the power storage element 1 adjacent to the first surface of the base 20A of the inner spacer 2A and the power storage element 1 adjacent to the second surface of the base 20A of the inner spacer 2A. Extend.

  210 A of 1st control parts contact | abut each cover plate 101 of the electrical storage element 1 arrange | positioned on both sides of the base 20A of the inner spacer 2A, and one second wall 100d of the trunk | drum 100b. The second restricting portion 211A comes into contact with the respective cover plates 101 of the power storage element 1 disposed on both sides of the base 20A of the inner spacer 2A and the other second wall 100d of the trunk portion 100b.

  The third restricting portion 212A and the fourth restricting portion 213A are directed toward the power storage element 1 adjacent to the first surface of the base 20A of the inner spacer 2A and the power storage element 1 adjacent to the second surface of the base 20A of the inner spacer 2A. Extend.

  212 A of 3rd control parts contact | abut to each closure part 100a of the electrical storage element 1 arrange | positioned on both sides of the base 20A of the inner spacer 2A, and one second wall 100d of the trunk | drum 100b. The other fourth restricting portion 213A is in contact with the closing portion 100a of the power storage element 1 disposed on both sides of the base 20A of the inner spacer 2A and the other second wall 100d of the trunk portion 100b.

  In the inner spacer 2A according to the present embodiment, the extending portion 22A is formed integrally with the restricting portion 21A. That is, the inner spacer 2A includes an extending portion 22A as the restricting portion 21A (in other words, in the inner spacer 2A of the present embodiment, the restricting portion 21A and the extending portion 22A are a common part).

  This will be described more specifically. As shown in FIGS. 7 and 8, the extending portion 22A is bent. The insulator 4 is in contact with the outer corner surface of the extending portion 22A.

  The outer corner surface of the extension 22A includes a reference surface 220A that extends in the X-axis direction and the Z-axis direction. Further, the outer corner surface of the extending portion 22A includes a pair of contacted surfaces 221A and 222A extending from both ends of the reference surface 220A in the Z-axis direction. In the description of the power storage device according to the present embodiment, one contacted surface 221A is referred to as a first contacted surface 221A, and the other contacted surface 222A is described as a second contacted surface 222A. There are things to do.

  The first abutted surface 221A and the second abutted surface 222A are displaced toward one side in the Y-axis direction as they extend from the reference surface 220A. That is, the first abutted surface 221A and the second abutted surface 222A are inclined with respect to a plane extending in the X-axis direction and the Z-axis direction. The first abutted surface 221A is disposed at a position closer to the ventilation path 23A than the second abutted surface 222A.

  As described above, the restricting portion 21A is formed at each corner of the base 20A of the inner spacer 2A. That is, the base 20A of the inner spacer 2A has a plurality (four) of extended portions 22A formed at each corner. Of the plurality of extending portions 22A, each of the pair of extending portions 22A arranged in the Z-axis direction is arranged such that the first contacted surfaces 221A are adjacent to each other in the Z-axis direction.

  Since the power storage device according to this embodiment includes a plurality of power storage elements 1 as described above, the internal spacers 2 </ b> A are disposed between the adjacent power storage elements 1. That is, the power storage device includes a plurality of internal spacers 2A.

  Each extending portion 22A of the plurality of inner spacers 2A is adjacent to the extending portion 22A of the inner spacer 2A adjacent in the X-axis direction. Therefore, each of the reference surfaces 220A of the extending portions 22A adjacent in the X-axis direction is located on the same surface or substantially the same surface. Moreover, each of the first contact surfaces 221A of the extending portions 22A adjacent in the X-axis direction is located on the same surface or substantially the same surface. Furthermore, each of the second contacted surfaces 222A of the extending portions 22A adjacent in the X-axis direction is located on the same surface or substantially the same surface.

  Next, the external spacer 2B will be described. The outer spacer 2 </ b> B is a spacer 2 (spacer 2 disposed on the outermost side in the X-axis direction) that is disposed at the end in the X-axis direction among the plurality of spacers 2.

  As shown in FIG. 6, the outer spacer 2 </ b> B includes a base having a first surface facing the power storage device 1 (the first wall 100 c of the case body 100) and a second surface opposite to the first surface (hereinafter, 20B and a restricting portion (hereinafter referred to as a restricting portion) 21B that determines the position of the power storage element 1 adjacent to the base 20B.

  Further, the base 20 </ b> B of the external spacer 2 </ b> B according to the present embodiment faces a termination member 30 (described later) of the holding member 3. That is, the external spacer 2 </ b> B is disposed between the power storage element 1 and the termination member 30. Accordingly, the outer spacer 2B has a fitting portion 22B that fits the termination member 30 at a position facing the termination member 30 of the base 20B. That is, the outer spacer 2B is a fitting portion 22B for determining the position of the termination member 30 with respect to the base 20B, and has a fitting portion 22B formed on the second surface of the base 20B.

  Furthermore, the outer spacer 2B has an extending portion 23B extending in the X-axis direction from the base 20A.

  In the present embodiment, the external spacer 2 </ b> B is an internal contact portion 200 </ b> B that protrudes from the first surface of the base 20 </ b> B toward the power storage device 1, and has an internal contact portion 200 </ b> B that contacts the power storage device 1.

  The base 20B of the outer spacer 2B extends in the Y axis direction and the Z axis direction orthogonal to the X axis direction. That is, the base 20B is formed in a plate shape. The base 20 </ b> B of the outer spacer 2 </ b> B is a first end disposed at a position corresponding to the cover plate 101 of the power storage device 1, and a second end opposite to the first end, and is a closed portion of the power storage device 1. And a second end disposed at a position corresponding to 100a. Further, the base 20B of the outer spacer 2B is a third end disposed at a position corresponding to one second wall 100d of the power storage element 1, and a fourth end opposite to the third end. And a fourth end disposed at a position corresponding to the other second wall 100d of the element 1.

  The base 20B of the outer spacer 2B includes a first corner that is a portion where the first end and the third end are connected, and a second corner that is a portion where the first end and the fourth end are connected. Have. In addition, the base 20B of the outer spacer 2B has a fourth triangular portion which is a portion where the second end and the fourth end are connected to each other, and a fourth triangle which is a portion where the second end and the third end are connected. Part.

  The first end and the second end of the base 20B of the outer spacer 2B extend in the Y-axis direction. The third end and the fourth end of the base 20B of the outer spacer 2B extend in the Z-axis direction. Therefore, the base 20B of the outer spacer 2B has a substantially rectangular shape. Further, the base 20 </ b> B of the outer spacer 2 </ b> B is approximately the same size as the first wall 100 c of the electricity storage device 1.

  On the first surface of the base 20B of the outer spacer 2B, an air passage 24B for allowing fluid to pass between the first surface of the base 20B and the power storage element 1 is formed. That is, the base 20B of the external spacer 2B forms the ventilation path 24B between the power storage elements 1 adjacent in the X-axis direction (see FIG. 1).

  This will be described more specifically. The base 20B of the outer spacer 2B has an internal contact portion 200B extending from the first surface of the base 20B toward the case 10 of the power storage device 1 (the first wall 100c of the case body 100).

  The internal contact portion 200B is elongated in the Y-axis direction. The base 20B of the outer spacer 2B according to the present embodiment has a plurality of inner contact portions 200B. And each of the some internal contact part 200B is arrange | positioned at intervals in the direction orthogonal to a longitudinal direction. Thereby, a plurality of ventilation paths 24B are formed between the base 20B of the outer spacer 2B and the power storage element 1.

  Therefore, in the power storage device, the base 20B of the external spacer 2B forms a ventilation path 24B that communicates both ends in the Y-axis direction. Therefore, in the power storage device, the cooling fluid sent to the periphery flows from one end to the other end in the Y-axis direction through the ventilation path 24B.

  Note that, as described above, the power storage device according to the present embodiment has ducts arranged on one side of the plurality of power storage elements 1 in the Y-axis direction and on the other side of the plurality of power storage elements 1 in the Y-axis direction. 5 (see FIG. 9).

  Therefore, one duct 5 is disposed at a position adjacent to one end in the Y-axis direction of each of the plurality of ventilation paths 24B. The other duct 5 is disposed at a position adjacent to the other end in the Y-axis direction of each of the plurality of ventilation paths 24B.

  Therefore, in the power storage device, the cooling fluid sucked into one duct 5 by the intake fan flows from one end of the ventilation path 24B in the Y-axis direction to the other end and is discharged from the other duct 5. ing.

  As described above, the first surface of the outer spacer 2B is adjacent to the power storage element 1. The restricting portion 21B extends toward the power storage element 1 adjacent to the first surface of the base 20B of the outer spacer 2B so as to restrict the relative movement of the power storage element 1 adjacent to the first surface of the outer spacer 2B.

  This will be described more specifically. The outer spacer 2B includes a restricting portion 21B formed at the first end of the base 20B and a restricting portion 21B formed at the second end of the base 20B as the restricting portion 21B.

  The outer spacer 2B includes, as the restricting portion 21B, a first restricting portion 210B formed at the first corner portion, a second restricting portion 211B formed at the second corner portion, and a third restriction formed at the third triangular portion. Part 212B and a fourth restricting part 213B formed at the fourth corner part.

  As described above, the first surface of the base 20 </ b> B of the outer spacer 2 </ b> B faces the power storage element 1. Therefore, the 1st control part 210B and the 2nd control part 211B are extended toward the electrical storage element 1 adjacent to the 1st surface of the base 20B of the external spacer 2B.

  The first restricting portion 210B comes into contact with the first end of the cover plate 101 of the power storage element 1 adjacent to the first surface of the base 20B of the outer spacer 2B and the second wall 100d of the trunk portion 100b. And the 2nd control part 211B contact | abuts to the 2nd end of the cover plate 101 of the electrical storage element 1 adjacent to the 1st surface of the base 20B of the external spacer 2B, and the 2nd wall 100d of the trunk | drum 100b.

  As described above, the first surface of the base 20 </ b> B of the outer spacer 2 </ b> B faces the power storage element 1. Therefore, the 3rd control part 212B and the 4th control part 213B are extended toward the electrical storage element 1 adjacent to the 1st surface of the base 20B of the external spacer 2B.

  The third restricting portion 212B comes into contact with the first end of the closing portion 100a of the power storage element 1 adjacent to the first surface of the base 20B of the outer spacer 2B and the second wall 100d of the trunk portion 100b. And the 4th control part 213B contact | abuts to the 2nd end 100d of the obstruction | occlusion part 100a of the electrical storage element 1 adjacent to the 1st surface of the base 20B of the external spacer 2B, and the trunk | drum 100b.

  The restricting portion 21B has an extending portion 23B that extends from the second surface of the base 20B of the outer spacer 2B toward the holding member 3 (an end member 30 described later).

  In the outer spacer 2B according to the present embodiment, the extending portion 23B is formed integrally with the restricting portion 21B. That is, the outer spacer 2B includes an extending portion 23B as the restricting portion 21B (in other words, in the outer spacer 2B of the present embodiment, the restricting portion 21B and the extending portion 23B are a common part).

  This will be described more specifically. The extending part 23B is bent. The insulator 4 abuts on the outer corner surface of the extending portion 23B.

  As illustrated in FIGS. 7 and 8, the outer angle surface of the extending portion 23 </ b> B includes a reference surface 230 </ b> B that extends in the X-axis direction and the Z-axis direction. Further, the outer corner surface of the extending portion 23B includes a pair of contacted surfaces 231B and 232B extending from both ends of the reference surface 230B in the Z-axis direction. In the description of the power storage device according to this embodiment, one contacted surface 231B is referred to as a first contacted surface 231B, and the other contacted surface 232B is described as a second contacted surface 232B. There are things to do.

  The first abutted surface 231B and the second abutted surface 232B are displaced to one side in the Y-axis direction as they extend from the reference surface 230B. That is, the first abutted surface 231B and the second abutted surface 232B are inclined with respect to a plane extending in the X-axis direction and the Z-axis direction. The first abutted surface 231B is disposed at a position closer to the ventilation path 23A than the second abutted surface 232B.

  As described above, the restricting portion 21A is formed at each corner of the base 20B of the outer spacer 2B. That is, the base 20B of the outer spacer 2B has a plurality (four) of extended portions 23B formed at each corner. Of the plurality of extending portions 23B, each of the pair of extending portions 23B arranged in the Z-axis direction is disposed such that the first contacted surfaces 231B are adjacent to each other in the Z-axis direction. Accordingly, the outer spacer 2B is continuous over the extending portion 23B formed at one end of the base 20B in the Z-axis direction and the extending portion 23B formed at the other end of the base 20B in the Z-axis direction. It has a connection side 25B.

  The connection side 25B has a reference surface 250B extending in the X-axis direction and the Z-axis direction, and a pair of pressed surfaces 251B and 252B formed at both ends of the reference surface 250B in the X-axis direction. In the description of the power storage device according to the present embodiment, one pressed surface 251B may be described as the first pressed surface 251B, and the other pressed surface 252B may be described as the second pressed surface 252B. .

  The reference surface 250B of the connection side 25B is continuous with the reference surface 230B of one extension portion 23B and the reference surface 230B of the other extension portion 23B.

  The first pressed surface 251B and the second pressed surface 252B of the connection side 25B are displaced toward one side in the Y-axis direction as they extend from the reference surface 250B. That is, the first pressed surface 251B and the second pressed surface 252B are inclined with respect to a plane extending in the X-axis direction and the Z-axis direction.

  The first pressed surface 251B is disposed at a position closer to the ventilation path 24B than the second pressed surface 252B.

  In the outer spacer 2B, the first pressed surface 251B of the connection side 25B is continuous with the first contacted surface 231B of one extension portion 23B and the contacted surface 231B of the other extension portion 23B. To do. In the outer spacer 2B, the second pressed surface 252B of the connection side 25B includes a second contacted surface 232B of one extension portion 23B and a second contacted surface 232B of the other extension portion 23B. It is continuous.

  As described above, the outer spacer 2 </ b> B according to the present embodiment is disposed adjacent to the inner spacer 2 </ b> A via the power storage element 1. That is, the power storage device includes a pair of external spacers 2B. The outer spacer 2 </ b> B is adjacent to the power storage element 1 at the end of the plurality of power storage elements 1. That is, a pair of external spacers 2B are provided so as to sandwich a plurality of aligned storage elements 1.

  Each of the pair of external spacers 2 </ b> B faces the case body 100 of the electricity storage device 1 as described above. Therefore, each of the pair of external spacers 2B is disposed such that the first surfaces of the bases 20B of the external spacers 2B face each other. Therefore, in the power storage device, each of the pair of external spacers 2B is disposed so as to be symmetrical with each other in the direction in which the plurality of power storage elements 1 are aligned (hereinafter referred to as the X-axis direction).

  Each extending portion 23B of each of the plurality of outer spacers 2B is adjacent to the extending portion 22A of the inner spacer 2A adjacent in the X-axis direction. Therefore, each of the reference surfaces 230B of the extending portions 23B of the outer spacers 2B adjacent in the X-axis direction and each of the reference surfaces 220A of the extending portions 22A of the inner spacer 2A are on the same surface or substantially the same surface. Located on the top. Also, each of the first abutted surfaces 231B of the extending portions 23B of the outer spacers 2B adjacent in the X-axis direction and each of the first abutted surfaces 221A of the extending portions 22A of the inner spacer 2A. Is located on the same plane or substantially the same plane. Further, each of the second abutted surfaces 232B of the extending portions 23B of the outer spacers 2B adjacent in the X-axis direction and each of the second abutted surfaces 222A of the extending portions 22A of the inner spacer 2A. Is located on the same plane or substantially the same plane.

  Therefore, as shown in FIG. 2, at both ends of the power storage device in the Y-axis direction, the first contacted surface 221A of the extending portion 22A of each inner spacer 2A and the first of the extending portion 23B of each outer spacer 2B Each of the contacted surface 231B and the first pressed surface 251B of the connection side 25B of each external spacer 2B includes a ventilation path 23A formed by the base 20A of each internal spacer 2A and the base of each external spacer 2B. They are arranged side by side so as to surround the ventilation path 24B formed by 20B.

  Therefore, at both ends of the power storage device in the Y-axis direction, the second abutted surface 222A of the extending portion 22A of each inner spacer 2A, the second abutted surface 232B of the extending portion 23B of each outer spacer 2B, Each of the second pressed surfaces 252B of the connection side 25B of each outer spacer 2B includes a first contacted surface 221A of the extending portion 22A of each inner spacer 2A and an extending portion 23B of each outer spacer 2B. The first contacted surface 231B and the first pressed surface 251B of the connection side 25B of each external spacer 2B are arranged side by side so as to surround each.

  In the present embodiment, the holding member 3 is made of metal. The holding member 3 holds a plurality of power storage elements 1 and a plurality of spacers 2 (inner spacer 2A and outer spacer 2B). This will be described more specifically. As shown in FIG. 5, the holding member 3 includes a pair of termination members 30 disposed at positions adjacent to the external spacers 2 </ b> B, and a frame 31 that connects each of the pair of termination members 30.

  Each of the pair of termination members 30 has a first surface facing the outer spacer 2B and a second surface opposite to the first surface.

  The end member 30 is disposed at a position corresponding to the cover plate 101 of the power storage element 1 and a second end opposite to the first end (at a position corresponding to the closing portion 100a of the power storage element 1). A second end). In addition, the termination member 30 includes a third end disposed at a position corresponding to the second wall 100d of the power storage element 1, and a fourth end opposite to the third end (the other end of the power storage element 1). Second wall 100d and a fourth end disposed at a corresponding position).

  Accordingly, the termination member 30 includes a first corner portion that is a portion where the first end and the third end are connected, and a second corner portion that is a portion where the first end and the fourth end are connected. Have Moreover, the termination | terminus member 30 has the 4th triangle part which is a part to which each of a 2nd end and a 4th end is connected, and the 4th triangle part which is a part to which a 2nd end and a 3rd end are connected. Have.

  The frame 31 has a connection portion that extends across the pair of termination members 30. In this embodiment, it has the 1st connection part 310 arrange | positioned in the position corresponding to the cover plate 101 of the electrical storage element 1, and the 2nd connection part 311 arrange | positioned in the position corresponding to the obstruction | occlusion part 100a of the electrical storage element 1. . That is, the frame 31 has a pair of connection portions 310 and 311 that are arranged with a gap in the Z-axis direction.

  The frame 31 according to the present embodiment is formed in a frame shape by connecting the support portion 312 to the first connection portion 310 and the second connection portion 311. Accordingly, in the power storage device according to the present embodiment, the first connection unit 310, the second connection unit 311 that are arranged on one side of the power storage element 1 in the direction orthogonal to the X-axis direction (hereinafter referred to as the Y-axis direction), The member having the support portion 312 is a first connecting member 31A, and the first connecting portion 310, the second connecting portion 311 and the member having the supporting portion 312 that are disposed on the other side of the storage element in the Y-axis direction are the second connecting members. The following description may be given as 31B.

  The frame 31 has a fixing portion 313 that is connected to the terminal member 30.

  The first connecting portion 310 has a first end in a longitudinal direction and a second end opposite to the first end.

  Further, the first connection portion 310 is bent in a direction orthogonal to the longitudinal direction. In the first connection part 310, one part with the bent part as a boundary is arranged at a position corresponding to the cover plate 101 of the electricity storage device 1. In the first connection portion 310, the other with the bent portion as a boundary is disposed at a position corresponding to the second wall 100 d of the energy storage device 1.

  The second connection portion 311 has a first end and a second end opposite to the first end in a longitudinal direction.

  The second connection portion 311 is bent in a direction orthogonal to the longitudinal direction. The second connecting portion 311 is arranged such that one portion with the bent portion as a boundary is disposed at a position corresponding to the closed portion 100a of the power storage element 1, and the other portion with the bent portion as the boundary is the power storage device 1. It arrange | positions in the position corresponding to the 2nd wall 100d.

  In addition, it is preferable that the connection part (the 1st connection part 310 and the 2nd connection part 311) is curving so that the center part in a X-axis direction may become convex toward the insulator 4. FIG. In this way, the insulator 4 (the first insulating portion 40 and the first seal portion 41) is stronger by the central portion of the connecting portion in the X-axis direction and the extending portion 22A of the spacer 2 (spacer 2A). Sandwiched between.

  The support portion 312 includes a first support portion 312 a connected to the first end of the first connection portion 310 and the first end of the second connection portion 311, and a second end of the first connection portion 310 and the second connection portion 311. And a second support portion 312b connected to the second end.

  The fixing portion 313 is formed at a pair of first fixing portions 313 a formed at the first end and the second end of the first connection portion 310 and at the first end and the second end of the second connection portion 311. A pair of second fixing portions 313b.

  One first fixing portion 313a faces a portion around the through hole 300b of one terminal member 30. The other first fixing portion 313 a faces the portion around the through hole 300 b of the other end member 30. And each of a pair of 1st fixing | fixed part 313a has the 1st hole part 313c formed in the position corresponding to the through-hole 300b.

  Therefore, the first connection part 310 is coupled to the termination member 30 by screwing a nut into a bolt inserted into the through hole 300b of the termination member 30 and the first hole 313c of the first fixing part 313a. .

  One second fixing portion 313 b faces a portion around the through hole 300 b of one terminal member 30. The other second fixing portion 313b faces a portion around the through hole 300b of the other end member 30. And each of a pair of 2nd fixing | fixed part 313b has the 2nd hole part 313d formed in the position corresponding to the through-hole 300b.

  Therefore, the second connection portion 311 is coupled to the termination member 30 by screwing a nut into a bolt inserted into the through hole 300b of the termination member 30 and the second hole portion 313d of the second fixing portion 313b. .

  The insulator 4 is made of an insulating material. The insulator 4 can be made of a material such as polypropylene, polyethylene, or polystyrene. These materials preferably do not contain fibers such as glass fibers or aramid fibers. The insulator 4 according to this embodiment is made of polypropylene. The insulator 4 is disposed between each of the plurality of spacers 2 (inner spacer 2 </ b> A and outer spacer 2 </ b> B) and the holding member 3.

  Therefore, the insulator 4 is a first insulating portion 40 disposed between each of the extending portions of the plurality of spacers 2 and the holding member 3, and the first insulating portion 40 that contacts the holding member 3. And a first seal portion 41 that is continuous with the first insulating portion 40 and is in contact with each of the extending portions of the plurality of spacers 2 (see FIG. 2). Have.

  The insulator 4 includes a second insulating portion 42 disposed between the connection side 25B of the external spacer 2B (spacer 2 disposed at both ends in the X-axis direction) and the holding member 3, and the second insulation. The second seal portion 43 is continuous with the portion 42, and has a second seal portion 43 that abuts on the connection side 25B of the outer spacer 2B (see FIG. 2).

  The first insulating portion 40 is between the first connecting portion 310 and the spacer 2 (inner spacer 2A and outer spacer 2B), and between the second connecting portion 311 and the spacer 2 (inner spacer 2A and outer spacer 2B). Placed in each. That is, the insulator 4 has a pair of first insulating portions 40.

  Each first insulating portion 40 is elongated in the X-axis direction. One first insulating portion 40 is sandwiched between the first connecting portion 310 and the spacer 2. Therefore, one first insulating portion 40 abuts on the first connecting portion 310. The other first insulating portion 40 is sandwiched between the second connecting portion 311 and the spacer 2. Therefore, the other first insulating portion 40 abuts on the second connecting portion 311.

  The first seal portion 41 has elasticity. As described above, the spacer 2 is made of polypropylene containing glass fiber, and the insulator 4 is made of polypropylene. Therefore, the first seal portion 41 has lower rigidity than the contact surfaces 221A and 222A of the inner spacer 2A and the contact surfaces 231B and 232B of the outer spacer 2B.

  As shown in FIGS. 10 and 11, the first seal portion 41 includes the first contact surface 221A of the extended portion 22A of the inner spacer 2A and the first covered surface of the extended portion 23B of the outer spacer 2B. A seal portion 410 that abuts against the abutment surface 231B, a second abutment surface 222A of the extension portion 22A of the inner spacer 2A, and a second abutment surface 232B of the extension portion 23B of the outer spacer 2B And a seal portion 411 in contact with.

  10 is a cross-sectional view at a position corresponding to the region R1 in FIG. 9, and FIG. 11 is a cross-sectional view at a position corresponding to the region R2 in FIG.

  One seal portion 410 is formed in a ridge (in this embodiment, formed in a ridge that is long in the X-axis direction). One seal portion 410 extends in a direction inclined with respect to the first contacted surface 221A of each inner spacer 2A and the first contacted surface 231B of each outer spacer 2B.

  As described above, the first contacted surface 221A of each inner spacer 2A and the first contacted surface 231B of each outer spacer 2B are inclined with respect to the plane extending in the X-axis direction and the Z-axis direction. is doing. Along with this, one seal portion 410 extends straight in the Y-axis direction.

  The other seal portion 411 is formed in a ridge (in this embodiment, formed in a ridge that is long in the X-axis direction). The other seal portion 411 extends in a direction inclined with respect to the second contacted surface 222A of each inner spacer 2A and the second contacted surface 232B of each outer spacer 2B.

  As described above, the second abutted surface 222A of each inner spacer 2A and the second abutted surface 232B of each outer spacer 2B are inclined with respect to the plane extending in the X-axis direction and the Z-axis direction. is doing. Accordingly, the other seal portion 411 according to the present embodiment extends straight in the Y-axis direction.

  Thus, in the first seal portion 41, one seal portion 410 has the first contacted surface 221A of the extended portion 22A of the inner spacer 2A and the first covered surface of the extended portion 23B of the outer spacer 2B. The other seal portion 411 is in contact with the contact surface 231B, and the other seal portion 411 is the second contact surface 222A of the extension portion 22A of the inner spacer 2A and the second contact surface of the extension portion 23B of the outer spacer 2B. 232B abuts. Therefore, one seal part 410 is disposed at a position closer to the ventilation paths 23A and 24B than the other seal part 411.

  In the first seal portion 41 according to the present embodiment, the protruding length of one seal portion 410 (the amount of extension from the first insulating portion 40) is the same as or substantially the same as the protruding length of the other seal portion 411. It may be the same, may be longer than the protruding length of the other seal portion 411, or may be smaller than the protruding length of the other seal portion 411, but is longer than the protruding length of the other seal portion 411. Preferably it is.

  As shown in FIG. 5, the second insulating portion 42 is disposed between the first support portion 312a and the pair of external spacers 2B, and between the second support portion 312b and the pair of external spacers 2B. . That is, the insulator 4 has a pair of second insulating portions 42.

  Each second insulating portion 42 is elongated in the Z-axis direction. One second insulating part 42 contacts the first support part 312a. The other second insulating part 42 contacts the second support part 312b.

  The second seal portion 43 has elasticity. As described above, the spacer 2 is made of polypropylene containing glass fiber, and the insulator 4 is made of polypropylene. Therefore, the second seal portion 43 has lower rigidity than the pressed surfaces 251B and 252B of the outer spacer 2B.

  As shown in FIG. 12, the second seal portion 43 includes a seal portion 430 that contacts the first pressed surface 251B of the connection side 25B of the outer spacer 2B, and a second cover of the connection side 25B of the outer spacer 2B. And a seal portion 431 that contacts the pressing surface 252B.

  One seal portion 430 is formed on a ridge (in this embodiment, formed on a ridge that is long in the Z-axis direction). One seal portion 430 extends in a direction inclined with respect to the first pressed surface 251B.

  As described above, the first pressed surface 251B is inclined with respect to a plane extending in the X-axis direction and the Z-axis direction. Along with this, one seal portion 430 extends straight in the Y-axis direction.

  The other seal portion 431 is formed in a ridge (in this embodiment, formed in a ridge that is long in the Z-axis direction). The other seal portion 431 extends in a direction inclined with respect to the second pressed surface 252B.

  As described above, the second pressed surface 252B of each external spacer 2B is inclined with respect to a plane extending in the X-axis direction and the Z-axis direction. Along with this, the other seal portion 431 extends straight in the Y-axis direction.

  As described above, in the outer spacer 2B, the first pressed surface 251B is disposed at a position closer to the ventilation path 24B than the second pressed surface 252B. Therefore, one seal part 430 is disposed at a position closer to the ventilation path 24 </ b> B than the other seal part 431.

  In the second seal portion 43 according to the present embodiment, the protruding length of one seal portion 431 (the amount of extension from the second insulating portion 42) is the same as or substantially the same as the protruding length of the other seal portion 431. It may be the same, may be longer than the protruding length of the other seal portion 431, or may be smaller than the protruding length of the other seal portion 431, but is longer than the protruding length of the other seal portion 431. Preferably it is.

  In the insulator 4, each seal portion 410 of the first seal portion 41 and each seal portion 430 of the second seal portion 43 are formed in a single connection. Further, in the insulator 4, each seal portion 411 of the first seal portion 41 and each seal portion 431 of the second seal portion 43 are formed in a single connection.

  Therefore, in the insulator 4, each seal portion 410 of the first seal portion 41 and each seal portion 430 of the second seal portion 43 are each sealed portion 411 of the first seal portion 41 and the second seal portion. It is surrounded by 43 seal portions 431.

  As described above, in the power storage device according to this embodiment, the first insulating portion 40 of the insulator 4 is in contact with the holding member 3, and the first seal portion 41 that is continuous with the first insulating portion 40 is the spacer 2. In contact with the extending portion (in this embodiment, the extending portion 22A of the inner spacer 2A and the extending portion 23B of the outer spacer 2B).

  Therefore, in the power storage device, the cooling fluid that is about to flow between the holding member 3 and the extended portion of the spacer 2 is supplied with the first insulating portion 40 of the insulator 4 and the first seal portion 41 of the insulator 4. Can be blocked by.

  This will be described more specifically. As described above, in the power storage device, the duct 5 is disposed at each of a position adjacent to one end of the ventilation paths 23A and 24B and a position adjacent to the other end of the ventilation paths 23A and 24B.

  Therefore, in the power storage device, between the insulator 4 and the spacer 2 (in this embodiment, between the outer corner surface of the extending portion 22A of the inner spacer 2A and the first insulating portion 40 of the insulator 4 and between the outer spacer 2B and the outer spacer 2B). The cooling fluid tends to flow into the outer corner surface of the extending portion 23B and the first insulating portion 40 of the insulator 4).

  However, in the power storage device according to this embodiment, the first seal portion 41 that is continuous with the first insulating portion 40 contacts the extension portion 22A of the inner spacer 2A and the extension portion 23B of the outer spacer 2B. Between the outer corner surface of the extending portion 22A of the spacer 2A and the first insulating portion 40 of the insulator 4, and between the outer corner surface of the extending portion 23B of the outer spacer 2B and the first insulating portion 40 of the insulator 4. The flow of the cooling fluid that is about to flow in can be blocked.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member 3 and the extended portion of the spacer 2 can be circulated through the ventilation paths 23A and 24B. In this manner, in the power storage device, a decrease in the cooling fluid flowing through the ventilation paths 23A and 24B can be suppressed.

  In addition, the first seal portion 41 has elasticity and has lower rigidity than each of the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B. Yes.

  Therefore, the first seal portion 41 is elastically deformed as it comes into contact with the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B. As a result, an elastic force acts on the first seal portion 41.

  In the present embodiment, the first seal portion 41 in the power storage device is inclined with respect to the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B. It extends to.

  Therefore, in the power storage device, the first seal portion 41 is brought into contact with the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B, thereby the first contact portion 221A. The seal part 41 is elastically deformed.

  This makes it difficult for the first seal portion 41 to be separated from the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B. Therefore, in the power storage device, the fluid that flows between the holding member 3 and the extended portion of the spacer 2 is more reliably blocked.

  In the power storage device, the first seal portion 41 abuts each of the extending portions 22A arranged in the Z-axis direction of the inner spacer 2A and each of the extending portions 23B arranged in the Z-axis direction of the outer spacer 2B. . Therefore, in the power storage device, each of the extending portions 22A arranged in the Z-axis direction of the inner spacer 2A and the holding member 3 and each of the extending portions 23B arranged in the Z-axis direction of the outer spacer 2B and the holding member 3 are arranged. The fluid that is about to flow into each of the gaps is blocked by the first seal portion 41. That is, in the power storage device, the fluid that tries to flow between the holding member 3 and the extended portion of the spacer 2 is blocked by the first seal portion 41 at both ends in the Z-axis direction.

  In the power storage device, the first seal portion 41 is formed on a protrusion that contacts each of the extending portion 22A of the inner spacer 2A and the extending portion 23B of the outer spacer 2B. Therefore, in the power storage device, the first seal portion 41 blocks the flow of the cooling fluid that is about to flow between the holding member 3 and the extended portions of the plurality of spacers 2.

  Therefore, in the power storage device, the fluid that is about to flow between the holding member 3 and the extending portions of the plurality of spacers 2 can be circulated through the ventilation paths 23A and 24B.

  Further, in the power storage device, one seal portion 430 of each of the pair of second seal portions 43 is in contact with the connection side 25B of the external spacer 2B. Therefore, in the power storage device, the fluid that tries to flow between the connection side 25 </ b> B of the external spacer 2 </ b> B and the holding member 3 is blocked by the second seal portion 43.

  As described above, in the power storage device, in addition to the fluid that is about to flow between each of the extending portions 22A of the inner spacer 2A and the holding member 3, the space between the connection side 25B of the outer spacer 2B and the holding member 3 is used. The fluid that is about to flow into can also be circulated through the ventilation paths 23A and 24B.

  The first seal portion 41 includes a seal portion 410 that contacts the first contacted surface 221A of the inner spacer 2A and the first contacted surface 231B of the outer spacer 2B, and the first seal portion 41 of the inner spacer 2A. A seal portion 411 that contacts each of the second contacted surface 222A and the second contacted surface 232B of the outer spacer 2B.

  Therefore, the cooling fluid that tends to flow between the holding member 3 and the extended portion of the spacer 2 can be blocked by the pair of seal portions 410 and 411 of the first seal portion 41. Therefore, in the power storage device, the fluid that is about to flow between the holding member 3 and the extended portion of the spacer 2 is more reliably blocked.

  In addition, the electrical storage apparatus which concerns on this invention is not limited to the said one Embodiment, Of course, in the range which does not deviate from the summary of this invention, various changes are made.

  In the above embodiment, the base 20 </ b> A of the inner spacer 2 </ b> A has a substantially rectangular shape, and is approximately the same size as the first wall 100 c of the electricity storage device 1. However, the base 20 </ b> A of the inner spacer 2 </ b> A is not limited to a substantially rectangular shape as long as the postures of the two adjacent power storage elements 1 can correspond to each other, and the first wall 100 c of the power storage element 1 It is not limited to what is a substantially equivalent magnitude | size.

  In the above embodiment, the base 20 </ b> B of the outer spacer 2 </ b> B has a substantially rectangular shape and is approximately the same size as the first wall 100 c of the power storage device 1. However, the base 20 </ b> B is not limited to the base 20 </ b> B formed in a substantially rectangular shape as long as the posture of the adjacent power storage element 1 and the posture of the termination member 30 can be matched. It is not limited to what is formed in the magnitude | size substantially equivalent to the 1st wall 100c of.

  In the above-described embodiment, the outer spacer 2B has the restricting portions 21B formed at the corners of the base 20B. However, as long as the restricting portion 21B can determine the position where the power storage element 1 is disposed with respect to the base 20B, the position formed on the base 20B is not limited.

  In the above embodiment, the first seal portion 41 of the insulator 4 extends straight in the Y-axis direction, and the contacted surfaces 221A and 222A of the extension portion 22A in each of the plurality of extension portions 22A are: The first seal portion 41 of the insulator 4 is formed so as to spread in a direction inclined with respect to the extending direction. However, the present invention is not limited to this. For example, the first seal portion 41 of the insulator 4 is formed. Extends in a direction inclined with respect to a second direction (Y-axis direction) orthogonal to the first direction (X-axis direction), and a contacted surface of the extending portion 22A in each of the plurality of spacers 2 221A and 222A may be formed so as to spread in the X-axis direction and the Z-axis direction.

  In the said embodiment, although the insulator 4 was provided with the 1st seal part 41 and the 2nd seal part 43, it is not limited to this, For example, the insulator 4 is the 1st seal part 41. Or only the second seal portion 43 may be provided.

  In the above embodiment, the insulator 4 includes a pair of first seal portions 41 and a pair of first seal portions 410 and a pair of second seal portions 43 and a pair of first seal portions 430. Although each other seal part 411 of seal part 41 and each other seal part 431 of a pair of 2nd seal parts 43 were surrounded, it is not limited to this, For example, insulator 4 is Each of the pair of first seal portions 41 includes only one seal portion 410, and each of the pair of second seal portions 43 includes only one seal portion 430, or a pair of first seal portions Each of the portions 41 may include only the other seal portion 411, and each of the pair of second seal portions 43 may include only the other seal portion 431. There.

  In the embodiment described above, each of the pair of external spacers 2B has the connection side 25B, but is not limited thereto. For example, one outer spacer 2B of the pair of outer spacers 2B may have a connection side 25B. In this case, the insulator 4 may have one second insulating portion 42 and one second seal portion 43.

  Moreover, in the said embodiment, although the insulator 4 came to have the 1st insulating part 40, the 1st seal | sticker part 41, the 2nd insulating part 42, and the 2nd seal | sticker part 43, it is limited to this. Is not to be done. For example, the insulator 4 may have a second insulating portion 42 and a second seal portion 43. The first seal portion 41 may be in the extended portions 22A and 23B of the spacer 2, or between the extended portions 22A and 23B of the spacer 2 and the first insulating portion 40 of the insulator 4. There may be an independent seal member. Further, the insulator 4 and the holding member 3 may be integrated.

  In the above-described embodiment, the cooling fluid is flowed into the air passages 23A and 24B using the intake fan. However, the present invention is not limited to this. For example, an exhaust fan may be used instead of the intake fan, and a cooling fluid may be passed through the air passages 23A and 24B using a force for discharging the fluid.

  When the exhaust fan is used, fluid that does not contribute to cooling of the electricity storage element 1 (fluid that does not pass through the ventilation paths 23A and 24B) can be generated through the gap between the holding member 3 and the spacer 2. However, the fluid that passes through the gap between the holding member 3 and the spacer 2 can be suppressed by the first seal portion 41 and the second seal portion 43 of the insulator 4. Therefore, it can suppress that the cooling fluid which flows through ventilation path 23A, 24B reduces.

  DESCRIPTION OF SYMBOLS 1 ... Power storage element, 2 ... Spacer, 2A ... Internal spacer, 2B ... External spacer, 3 ... Holding member, 4 ... Insulator, 5 ... Duct, 10 ... Case, 11 ... External terminal, 20A ... Base, 20B ... Base, 21A ... regulating part, 21B ... regulating part, 22A ... extension part, 22B ... fitting part, 23A, 24B ... ventilation path, 23B ... extension part, 25B ... connection side, 30 ... terminal member, 31 ... frame, 31A ... 1st connecting member, 31B ... 2nd connecting member, 40 ... 1st insulating part, 41 ... 1st sealing part, 42 ... 2nd insulating part, 43 ... 2nd sealing part, 100 ... case main body, 100a ... occlusion part, 100b ... body part, 100c ... first wall, 100d ... second wall, 101 ... lid plate, 200A ... first contact part, 200B ... internal contact part, 201A ... second contact part, 202A ... Continuous arrangement part, 210A ... 1st regulation part, 10B: 1st restriction part, 211A: 2nd restriction part, 211B ... 2nd restriction part, 212A ... 3rd restriction part, 212B ... 3rd restriction part, 213A ... 4th restriction part, 213B ... 4th restriction part, 220A ... reference surface, 221A ... first contact surface, 222A ... second contact surface, 230B ... reference surface, 231B ... first contact surface, 232B ... second contact surface, 250B ... reference plane, 251B ... first pressed surface, 252B ... second pressed surface, 300b ... through hole, 310 ... first connecting portion, 311 ... second connecting portion, 312 ... supporting portion, 312a ... first Support part, 312b ... second support part, 313 ... fixed part, 313a ... first fixed part, 313b ... second fixed part, 313c ... first hole part, 313d ... second hole part, 410,411 ... seal part, 430, 431 ... seal part

Claims (8)

A storage element;
A spacer disposed adjacent to the storage element in the first direction;
A holding member for holding the power storage element and the spacer;
An insulator disposed between the spacer and the holding member,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator is
A first insulating portion disposed between the holding member and the extended portion of the spacer in a state in contact with the holding member;
Have a, a first seal portion abutting on and the extending portion extending from the first insulating portion,
The extending portion includes a contacted surface that contacts the first seal portion,
The first seal portion extends in the second direction from the first insulating portion, contacts the contacted surface, has elasticity, and has lower rigidity than the contacted surface,
The contacted surface is inclined with respect to a direction in which the first seal portion extends;
Power storage device. The extending portion extends from each of both ends of the base in a third direction orthogonal to the first direction and the second direction,
The insulator has a pair of the first seal portions,
One first seal portion abuts on an extension formed at one end of the base in the third direction,
The other first seal portion is in contact with an extending portion formed at the other end of the base in the third direction.
The power storage device according to claim 1 . A plurality of power storage elements aligned in the first direction;
A plurality of spacers arranged adjacent to the plurality of power storage elements, and
Each of the plurality of spacers is
A base that forms a ventilation path between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The first seal portion is a protrusion that contacts each of the extending portions.
The power storage device according to claim 1 or 2 . Among the plurality of spacers, the spacer disposed at the end in the first direction is
A connecting side connecting a pair of extending portions extending from both ends of the base in a third direction orthogonal to each of the first direction and the second direction;
The insulator is
A second insulating portion disposed between the holding member and a connection side of the spacer disposed at the end;
A second seal portion extending from the second insulating portion, the second seal portion abutting against a connection side of a spacer disposed at the end,
The second seal portion is continuous with the first seal portion;
The power storage device according to claim 3 . A plurality of power storage elements aligned in a first direction ;
A plurality of spacers arranged in case Migihitsuji next by the plurality of power storage device and the first direction,
A holding member for holding the plurality of power storage devices and said plurality of spacers,
An insulator disposed between the plurality of spacers and the holding member,
Each of the plurality of spacers is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator is
A first insulating portion disposed between the holding member and the extended portion of the spacer in a state in contact with the holding member;
Have a, a first seal portion abutting on and the extending portion extending from the first insulating portion,
The first seal part is a protrusion that contacts each of the extension parts,
The holding member has a frame that is long in the first direction;
The frame has a connection portion arranged to be adjacent to each of the extension portions of the plurality of spacers with the first seal portion of the insulator interposed therebetween,
The connecting portion of the frame is curved so that a central portion in the first direction is convex toward the insulator .
Power storage device. A storage element;
A spacer disposed adjacent to the storage element in the first direction;
A holding member for holding the power storage element and the spacer;
An insulator disposed between the spacer and the holding member,
The spacer is
A base that forms a ventilation path in a second direction orthogonal to the first direction between the storage elements adjacent in the first direction;
Extending from the base in the first direction,
The insulator is
A first insulating portion disposed between the holding member and the extended portion of the spacer in a state in contact with the holding member;
Have a, a first seal portion abutting on and the extending portion extending from the first insulating portion,
The extending portion includes a contacted surface that contacts the first seal portion,
The first seal portion extends from the first insulating portion in a direction inclined with respect to the contacted surface,
The contacted surface of the extension part is
A first abutted surface;
Including the first abutted surface and the second abutted surface arranged in the third direction,
The first seal portion is
A seal portion in contact with the first contacted surface;
To have a, and a seal portion that contacts the second abutted surface,
Power storage device. The first contacted surface is disposed at a position closer to the ventilation path than the second contacted surface,
The protruding length of the seal portion that contacts the first contacted surface is greater than the protruding length of the seal portion that contacts the second contacted surface,
The power storage device according to claim 6 . The first seal portion is
While having elasticity, the rigidity is lower than the contacted surface,
Extending in a direction inclined with respect to the second direction and contacting the contacted surface;
The contacted surface extends in the first direction and a third direction orthogonal to the first direction and the second direction,
The power storage device according to claim 6 or 7.