JP2017079101A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device by which cooling air supplied to a ventilation flue formed between power storage elements is less likely to be leaked to the exterior.SOLUTION: A power storage device comprises: at least one power storage element 1; and an internal spacer 2A adjacent to the power storage element, and that forms a ventilation flue 203A in which cooling air can circulate, between the power storage element and itself. The internal spacer has an opposed part 210A opposed to the adjacent internal spacer while interposing the power storage element, at a position that faces on the ventilation flue 203A and that is at a near side of the power storage element in a circulation direction of the cooling air in the ventilation flue. One of a pair of opposed parts of the internal spacers arranged at both sides of the power storage element has an extension part extended toward the other. The extension part is contacted with the other opposed part.SELECTED DRAWING: Figure 6

Description

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

  Since various devices such as electric vehicles require a large-capacity power source, a power storage device including a plurality of power storage elements is used. As shown in FIGS. 11 to 13, this type of power storage device includes a power storage element 50 and a spacer 51 adjacent to the power storage element 50. The spacer 51 has the power storage elements 50 arranged on both sides, and forms a ventilation path 510 through which cooling air can flow between the adjacent power storage elements 50. In addition, the spacer 51 is a position facing the ventilation path 510 and at a position on the near side of the storage element 50 in the flow direction of the cooling air in the ventilation path 510 formed between the adjacent storage elements 50. It has the opposing part 511 which opposes the spacer 51 adjacent on both sides.

  In this power storage device 5, between the facing portions 511 of the spacers 51 arranged on both sides of the power storage element 50, the end portion 511 extends from the end edge 512 on the ventilation path 510 side to the end edge 513 opposite to the ventilation path 510. A gap 514 is formed. For this reason, when the cooling air for cooling the electricity storage element 50 is supplied to the ventilation path 510, a part of the cooling air leaks from the ventilation path 514 to the outside of the electricity storage device 5 through the gap, whereby the electricity storage device 5. The cooling effect of the storage element 50 is reduced.

JP 2010-157450 A

  In view of the above problems, an object of the present invention is to provide a power storage device in which cooling air supplied to a ventilation path formed between power storage elements is less likely to leak to the outside.

The power storage device according to the present invention includes:
At least one power storage element;
A spacer that is adjacent to the electricity storage element, and that forms a ventilation path through which cooling air can flow between the electricity storage element, and
The spacer has a facing portion facing the adjacent spacer across the power storage element at a position facing the ventilation path and adjacent to the power storage element in the flow direction of the cooling air in the ventilation path. And
One of the opposing portions of the pair of opposing portions of the spacers disposed on both sides of the power storage element has an extending portion that extends toward the other opposing portion of the pair of opposing portions,
The extending portion is in contact with the other facing portion.

  According to such a configuration, the extended portion extending from one facing portion to the other facing portion between the pair of facing portions causes the edge between the facing portions to extend from the edge on the airflow path side of the facing portion to the edge opposite to the airflow path. The air flow toward is obstructed. Thereby, it is possible to suppress the cooling air from leaking outside the power storage device through the pair of facing portions.

In the power storage device,
The other facing portion has an inclined surface that is inclined with respect to a first direction in which the pair of facing portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The extending portion may be in contact with at least a part of the inclined surface.

  According to this configuration, the extending portion and the inclined surface are in contact with each other so that the contact portion between the extending portion and the inclined surface extends in a direction intersecting the second direction. Thereby, the flow of the air which goes to the edge on the opposite side to a ventilation path between the opposing parts from the edge by the side of the ventilation path of an opposing part is prevented more effectively.

In the power storage device,
It is preferable that the extending portion is elastically deformable by contact with the inclined surface.

  According to such a configuration, since the extending portion can be elastically deformed along the inclined surface, even if the interval between the opposing portions is narrow due to a manufacturing error or the like, the variation in the interval is absorbed by the elastic deformation. . That is, even if the interval between the facing portions is narrowed due to a manufacturing error or the like, the extended portion is elastically deformed along the contact surface, so that the state in contact with the inclined surface is maintained.

In the power storage device,
The other opposing portion has a pair of the inclined surfaces,
The pair of inclined surfaces face each other with an interval in the second direction so that the interval becomes narrower with distance from the one opposing portion along the direction in which the pair of opposing portions face each other.
The one facing portion has a pair of the extending portions at a position facing the pair of inclined surfaces,
The pair of extending portions includes a pair of inclined portions in which a distance between tips of the pair of extending portions is smaller than a distance between the inclined surfaces at an end portion on the one facing portion side of the pair of inclined surfaces. It is preferable to line up in the second direction so as to be larger than the interval between the inclined surfaces at the end of the surface opposite to the one opposing portion.

  According to such a configuration, as the distance between the facing parts becomes narrower, the pair of extending parts are elastically deformed so that the distance between the tips is narrowed by the pair of inclined surfaces. The power to return is stronger. As described above, since the adjacent spacers can be regarded as being connected by the elastic body, resistance to vibration in the power storage device is improved.

In the power storage device,
The one facing portion has a plurality of the extending portions,
The other facing portion may have a number of the inclined surfaces corresponding to the plurality of extending portions.

  According to such a configuration, the flow of air from the edge on the airflow path side of the facing portion toward the edge opposite to the airflow path is prevented between the pair of facing portions by the plurality of extending portions. Thereby, it is possible to more effectively suppress the cooling air from leaking outside the power storage device through the pair of opposed portions.

In the power storage device,
The extending portion has an inclined surface that is inclined with respect to a first direction in which the pair of opposed portions are opposed to each other and a second direction orthogonal to the flow direction of the cooling air,
The other facing portion is in contact with at least a part of the inclined surface of the extending portion.

  According to this configuration, the extending portion and the inclined surface are in contact with each other so that the contact portion between the inclined surface of the extending portion and the facing portion extends in a direction intersecting the second direction. Thereby, the flow of the air which goes to the edge on the opposite side to a ventilation path between the opposing parts from the edge by the side of the ventilation path of an opposing part is prevented more effectively.

In the power storage device,
The extending portion has a first inclined surface that is inclined with respect to a first direction in which the pair of opposed portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The other facing portion has a second inclined surface that is inclined with respect to a first direction in which the pair of facing portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The first inclined surface may be in contact with at least a part of the second inclined surface.

  According to such a configuration, the extending portion (first inclined surface) and the other facing portion so that the contact portion between the first inclined surface and the second inclined surface extends in a direction intersecting the second direction. (Second inclined surface) contacts. Thereby, the flow of the air which goes to the edge on the opposite side to a ventilation path between the opposing parts from the edge by the side of the ventilation path of an opposing part is prevented more effectively.

When the first inclined surface and the second inclined surface are provided in the power storage device,
The angle α of the second inclined surface with respect to the first inclined surface is preferably 0 ° <α.

  If the first inclined surface and the second inclined surface are parallel, a gap may be generated between the first inclined surface and the second inclined surface due to a manufacturing error in manufacturing the spacer. However, as in the above configuration, if the angle α is larger than 0 °, that is, if the first inclined surface and the second inclined surface are not parallel, the generation of the gap due to the manufacturing error can be prevented. .

In the power storage device,
It is preferable that the extension portion contacts the other facing portion in the entire area of the other facing portion in the flow direction of the cooling air.

  According to such a configuration, in the entire region between the opposing portions in the flow direction of the cooling air, the flow of air from the end of the opposing portion toward the end opposite to the air passage is prevented between the opposing portions. Thereby, it is possible to more effectively suppress the cooling air from leaking outside the power storage device through the pair of opposed portions.

  As described above, according to the present invention, it is possible to provide a power storage device in which the cooling air supplied to the ventilation path formed between the power storage elements is difficult to leak to the outside.

FIG. 1 is a perspective view of a power storage device according to an embodiment of the present invention. FIG. 2 is a perspective view of a power storage element of the power storage device according to the embodiment. FIG. 3 is a front view of the power storage element of the power storage device according to the embodiment. FIG. 4 is an exploded perspective view of the power storage device according to the embodiment. FIG. 5 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. 6 is a side view of a power storage element and a spacer of the power storage device according to the embodiment. FIG. 7 is an enlarged view of the power storage device according to the embodiment, and is an enlarged view of a region VII in FIG. 6. FIG. 8 is an enlarged view of the power storage device according to the embodiment, and is an enlarged view of a region VIII in FIG. 6. FIG. 9 is an enlarged view of the power storage device according to the embodiment, and is an enlarged view of a region IX in FIG. 6. FIG. 10 is an enlarged view of a power storage device according to another embodiment of the present invention. FIG. 11 is a side view of a conventional power storage device. FIG. 12 is an enlarged view of a conventional power storage device, and is an enlarged view of a region in the vicinity of the facing portion of the spacer. FIG. 13 is an exploded perspective view of a conventional power storage device.

  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. 2 and 3, the power storage device 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. 3) 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 | drum 100b is opening. In the case 10, this opening is 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 that are orthogonal to each other and orthogonal to the direction in which the storage elements 1 are aligned (X-axis direction) is referred to as the Z-axis direction, and the remaining one direction is Y 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 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 two types of spacers 2 (2A and 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. 5, the inner spacer 2 </ b> A is a restriction that prevents a 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.

  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 elements 1, and a second surface opposite to the first surface, It has the 2nd surface facing the other electrical storage element 1 of 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 for allowing fluid (cooling fluid) to pass therethrough.

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

  Thereby, as shown in FIG. 6, in the power storage device, the surface of the first contact portion 200A opposite to the surface that contacts the power storage element 1 and the pair of connection portions 202A connected to the first contact portion 200A Thus, a ventilation path 203A is formed. Further, in the power storage device, the air passage 203A 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 connection portions 202A connected to the second contact portion 201A. The Therefore, in the power storage device, the cooling air flows through the base 20A of the inner spacer 2A between the first surface 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. A possible ventilation path 203A is formed.

  As described above, the inner spacer 2 </ b> A is disposed between two adjacent power storage elements 1. Therefore, the inner spacer 2A includes a restricting portion 21A extending toward the power storage element 1 adjacent to the first surface of the base 20A of the inner spacer 2A in order to restrict the relative movement of the two power storage elements 1 adjacent to the inner spacer 2A. And a restricting portion 21A extending 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. As shown in FIG. 5, the restricting portion 21A is formed at each corner of the base 20A of the inner spacer 2A.

  Each restricting portion 21A is a first restricting piece 210A connected to an outer edge extending in the Z-axis direction of the base 20A, the first restricting piece 210A extending from the base 20 in the X-axis direction, and the Y-axis of the base 20A A second restriction piece 211A connected to an outer edge extending in the direction, and a second restriction piece 211A extending from the base 20A in the X-axis direction.

  The first restricting piece 210A of the restricting portion 21A formed at the first corner is connected to the third end of the base 20A. The second restricting piece 211A of the restricting portion 21A formed at the first corner is connected to the first end of the base 20A.

  210 A of 1st control parts of 21 A of control parts formed in a 2nd corner | angular part are connected to the 4th end of base 20A. The second restricting piece 211A of the restricting portion 21A formed at the second corner is connected to the first end of the base 20A.

  The first restricting piece 210A of the restricting portion 21A formed at the third triangular portion is connected to the third end of the base 20A. The second restricting piece 211A of the restricting portion 21A formed on the third triangular portion is connected to the second end of the base 20A.

  The first restricting piece 210A of the restricting portion 21A formed at the fourth corner is connected to the fourth end of the base 20A. The second restricting piece 211A of the restricting portion 21A formed at the fourth corner is connected to the second end of the base 20A.

  As described above, the inner spacer 2A extends toward the power storage element 1 adjacent to the second surface of the base 20A of the inner spacer 2A and the regulating portion 21A extending toward the power storage element 1 adjacent to the first surface of the base 20A. And a restricting portion 21A that extends. Therefore, in each inner spacer 2A, each of the first restricting pieces 210A of the pair of restricting portions 21A constitutes a facing portion that faces both adjacent spacers 2 in the X-axis direction.

  The facing portion 210A is disposed at a position facing the ventilation path 203A and adjacent to the power storage element 1 in the flow direction of the cooling air in the ventilation path 203A. In addition, the opposing portions 210A are arranged in a line in the X-axis direction.

  As shown in FIG. 7, in the inner spacer 2 </ b> A, the facing portion 210 </ b> A is in contact with the facing portion 210 </ b> A of the adjacent inner spacer 2 </ b> A via the power storage element 1 on one side in the X-axis direction.

  This will be described more specifically. One facing portion 210A has an extending portion 212A extending from the facing portion 210A to one side in the X-axis direction. The other facing portion 210A is an inclined surface 216A formed on the facing portion 210A, and has an inclined surface 216A in contact with the extending portion 212A of the facing portion 210A adjacent on the other side in the X-axis direction.

  The extending portion 212A is in contact with the inclined surface 216A of the adjacent facing portion 210A in the X-axis direction. The extending portion 212A has a surface that is in contact with at least a part of the inclined surface 216A of the opposing portion 210A adjacent in the X-axis direction.

  The extending portion 212A according to the present embodiment has an inclined surface 213A that faces the inclined surface 216A of the opposing portion 210A adjacent in the X-axis direction in the Z-axis direction. The extending portion 212A has an extending surface 214A that extends straight from the inclined surface 213A in the X-axis direction.

  The inclined surface 213A is a surface that is inclined with respect to the X-axis direction and the Z-axis direction. The extending surface 214A is a surface that extends in the X-axis direction and the Y-axis direction.

  Therefore, in the extending portion 212A of the facing portion 210A, the surface that is in contact with at least a part of the inclined surface 216A of the facing portion 210A adjacent in the X-axis direction is bent at an intermediate position in the X-axis direction. In the present embodiment, the following description may be made with the surface including the inclined surface 213A and the extending surface 214A as the contact surface 215A.

  Furthermore, in the facing portion 210A according to the present embodiment, the pair of extending portions 212A are arranged with a gap in the Z-axis direction. Each of the pair of extending portions 212A is arranged in a direction opposite to the contact surface 215A of each other in the Z-axis direction. Each of the pair of extending portions 212A has elasticity.

  The inclined surface 216A of the facing portion 210A is inclined with respect to the X-axis direction and the Z-axis direction (directions orthogonal to the directions in which the pair of facing portions 210A face each other and the cooling air flow direction). That is, the inclined surface 216A of the facing portion 210A is formed so as to incline with respect to a plane extending in the X-axis direction and the Y-axis direction and to extend straight in the Y-axis direction.

  The inclined surface 216A according to the present embodiment is a recess 217A formed in the other first restricting piece 210A, and is configured by a part of the recess 217A that opens toward the facing portion 210A adjacent in the X-axis direction. . Therefore, the facing portion 210A has a pair of inclined surfaces 216A that face each other with a gap in the Z-axis direction.

  Each of the pair of inclined surfaces 216A is arranged at a position aligned with each of the pair of extending portions 212A in the X-axis direction.

  The pair of inclined surfaces 216 </ b> A are formed such that the interval between the pair of inclined surfaces 216 </ b> A becomes narrower as the distance from the adjacent facing portion 210 </ b> A in the X axis direction increases.

  Further, in the facing portion 210A, each of the portions on the opening side of the recessed portion 217A in each inclined surface 216A has a mutual interval larger than the interval between the tip portions of the pair of extending portions 212A (interval between the contact surfaces 215A). Line up to grow.

  Further, in the facing portion 210A, each of the portions on the bottom surface side of the concave portion 217A in each of the pair of inclined surfaces 216A has a distance between the end portions on the front end side of the pair of extending portions 212A (contact). Are arranged so as to be smaller than the interval between the surfaces 215A.

  Next, the external spacer 2B will be described. As shown in FIG. 5, the outer spacer 2 </ b> B includes a base (hereinafter, referred to as a first surface facing the power storage element 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.

  In the external spacer 2 </ b> B according to the present embodiment, the base 20 </ b> B and a termination member 30 described later of the holding member 3 are opposed to each other. That is, the external spacer 2B is disposed between the power storage element 1 and the termination member 30 (see FIG. 4).

  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. The outer spacer 2B is a shaft portion 23B for determining the position of the termination member 30 with respect to the base 20B, and has a shaft portion 23B protruding from the second surface of the base 20B.

  The base 20B of the outer spacer 2B extends in the Y-axis direction and the Z-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 a direction orthogonal to 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 for allowing fluid to pass is formed between the first surface of the base 20B and the power storage element 1.

  This will be described more specifically. The outer spacer 2B is a protrusion 200B that protrudes from the first surface of the base 20B toward the power storage element 1, and has a protrusion (hereinafter referred to as an internal contact part) 200B that contacts the power storage element 1. The internal contact portion 200B extends from the first surface of the base 20B toward the case 10 (the first wall 100c of the case body 100) of the energy storage device 1.

  The internal contact portion 200B is long in the Y-axis direction. As shown in FIG. 6, the base 20B of the external spacer 2B according to the present embodiment has a plurality of internal 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. Accordingly, the base 20B of the outer spacer 2B has a connecting portion 201B that is connected to each of the protruding portions 200B adjacent in the Z-axis direction. Thereby, a plurality of ventilation paths 202B through which cooling air can flow are formed between the base 20B of the external spacer 2B and the power storage element 1.

  As described above, the first surface of the outer spacer 2B is adjacent to the power storage element 1. Therefore, the outer spacer 2B includes a restricting portion 21B extending toward the power storage element 1 adjacent to the first surface of the base 20B of the outer spacer 2B in order to restrict the relative movement of the power storage element 1 adjacent to the first surface.

  This will be described more specifically. As shown in FIG. 5, the restricting portion 21B is formed at each corner of the base 20B of the outer spacer 2B.

  Each restricting portion 21B is a first restricting piece 210B connected to an outer edge extending in the Z-axis direction of the base 20B, the first restricting piece 210B extending from the base 20 in the X-axis direction, and the Y-axis of the base 20B A second restriction piece 211B connected in the direction, and extending from the base 20B in the X-axis direction.

  The first restricting piece 210B of the restricting portion 21B formed at the first corner is connected to the third end of the base 20B. The second restricting piece 211B of the restricting portion 21B formed at the first corner is connected to the first end of the base 20B.

  The first restricting piece 210B of the restricting portion 21B formed at the second corner is connected to the fourth end of the base 20B. The second restricting piece 211B of the restricting portion 21B formed at the second corner is connected to the first end of the base 20B.

  The first restricting piece 210B of the restricting portion 21B formed at the third triangular portion is connected to the third end of the base 20B. The second restricting piece 211B of the restricting portion 21B formed at the third triangular portion is connected to the second end of the base 20B.

  The first restricting piece 210B of the restricting portion 21B formed at the fourth corner is connected to the fourth end of the base 20B. The second restriction piece 211B of the restriction portion 21B formed at the fourth corner is connected to the second end of the base 20B.

  As described above, the outer spacer 2B includes the restricting portion 21B that extends toward the power storage element 1 adjacent to the first surface of the base 20B. Therefore, in the outer spacer 2B, each of the first restricting pieces 210B of the restricting portion 21B constitutes a facing portion 210A that faces the adjacent inner spacer 2A in the X-axis direction.

  The facing portion 210B of the outer spacer 2B is disposed at a position facing the ventilation path 202B and adjacent to the power storage element 1 in the flow direction of the cooling air in the ventilation path 202B. Further, the facing portion 210B of the outer spacer 2B is arranged so as to be aligned with the facing portion 210A of each inner spacer 2A in the X-axis direction.

  As shown in FIG. 6, in the outer spacer 2B, the facing portion 210B of the outer spacer 2B is in contact with the facing portion 210A of the adjacent inner spacer 2A via the power storage element 1 in the X-axis direction.

  As described above, the outer spacer 2 </ b> B according to the present embodiment is disposed so as to be 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.

  Therefore, as shown in FIG. 8, the facing portion 210B of one outer spacer 2B has an extending portion 212B extending from the first restricting piece 210B to one side in the X-axis direction.

  The extending portion 212B is in contact with the inclined surface 216A of the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction. Therefore, the extending part 212B has a surface in contact with at least a part of the inclined surface 216A of the facing part 210A of the inner spacer 2A adjacent in the X-axis direction.

  The extending portion 212B according to the present embodiment has an inclined surface 213B facing the inclined surface 216A of the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction in the Z-axis direction. The extending part 212B has an extending surface 214B extending straight from the inclined surface 213B in the X-axis direction.

  The inclined surface 213B is a surface that is inclined with respect to the X-axis direction and the Z-axis direction. The extending surface 214B is a surface that extends in the X-axis direction and the Y-axis direction.

  Therefore, in the extending portion 212B of the facing portion 210B, the surface that is in contact with at least a part of the inclined surface 216A of the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction is bent at an intermediate position in the X-axis direction. In the present embodiment, the following description may be made with the surface including the inclined surface 213B and the extending surface 214B as the contact surface 215B.

  Further, in the present embodiment, in the facing portion 210B of the outer spacer 2B, the pair of extending portions 212B are arranged with an interval in the Z-axis direction. Each of the pair of extending portions 212B is disposed in a direction opposite to the contact surface 215B of each other in the Z-axis direction. In addition, each of the pair of extending portions 212B has elasticity.

  As shown in FIG. 9, the facing portion 210B of the other outer spacer 2B is an inclined surface 216B that is in contact with the extending portion 212A of the facing portion 210A of the adjacent inner spacer 2A on the other side in the X-axis direction. Inclining with respect to the direction and the Z-axis direction (direction in which the facing portion 210B of the outer spacer 2B and the facing portion 210A of the inner spacer 2A face each other and the direction orthogonal to the flow direction of the cooling air) It has surface 216B.

  As described above, the inclined surface 216B of the facing portion 210B of the other outer spacer 2B is inclined with respect to the X-axis direction and the Z-axis direction. That is, the inclined surface 216B of the facing portion 210B of the outer spacer 2B is formed so as to incline with respect to a plane extending in the X-axis direction and the Y-axis direction and to extend straight in the Y-axis direction.

  The inclined surface 216B according to the present embodiment is a recess 217B formed in the first restricting piece 210B, and is configured by a part of the recess 217B that opens toward the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction. Is done. Therefore, the facing portion 210B of the outer spacer 2B has a pair of inclined surfaces 216B that face each other with a gap in the Z-axis direction.

  Each of the pair of inclined surfaces 216B is disposed at a position aligned with each of the pair of extending portions 212A of the inner spacer 2A in the X-axis direction.

  The pair of inclined surfaces 216 </ b> B are formed such that the distance between the pair of inclined surfaces 216 </ b> B decreases as the distance from the facing portion 210 </ b> A of the adjacent inner spacer 2 </ b> A increases in the X-axis direction.

  Further, in the facing portion 210B of the outer spacer 2B, each of the portions on the opening side of the concave portion 217B on each inclined surface 216B is spaced from each other (abutting between the tips of the pair of extending portions 212A of the inner spacer 2A). Are arranged so as to be larger than the interval between the surfaces 215A.

  Further, in the facing portion 210B of the outer spacer 2B, each of the portions on the bottom surface side of the recess 217B of each of the pair of inclined surfaces 216B is spaced from each other at the tip side of the pair of extending portions 212A of the inner spacer 2A. It is formed to be smaller than the interval between the end portions (interval between the contact surfaces 215A).

  In the present embodiment, the holding member 3 is made of metal. As shown in FIG. 4, 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. Each of the pair of termination members 30 has a pressure contact portion 300 that contacts the base 20B of the outer spacer 2B.

  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.

  And the press-contact part 300 has the insertion hole 300a formed in the position corresponding to the axial part 23B of the external spacer 2B. Further, the press contact part 300 has a plurality of (four in this embodiment) through holes 300b formed at each corner.

  The frame 31 is a first connection part 310 extending between the pair of termination members 30, and the first connection part 310 disposed at a position corresponding to the cover plate 101 of the power storage device 1, and the pair of termination members 30. It has the 2nd connection part 311 extended in the middle, Comprising: It has the 2nd connection part 311 arrange | positioned in the position corresponding to the obstruction | occlusion part 100a of the electrical storage element 1. FIG.

  The frame 31 has a support portion 312 that is connected to the first connection portion 310 and the second connection portion 311.

  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, which are arranged on one side of the power storage element in the direction orthogonal to the X-axis direction (hereinafter referred to as the Y-axis direction), A member having the support portion 312 is a first frame 31A, and a member having a first connection portion 310, a second connection portion 311 and a support portion 312 disposed on the other side of the storage element in the Y-axis direction is a second frame 31B. The following explanation may be given.

  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 the longitudinal direction and a second end opposite to the first end.

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

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

  The second connection portion 311 is bent along a direction orthogonal to the longitudinal direction. The second connection portion 311 is arranged such that one part with the bent part as a boundary is disposed at a position corresponding to the cover plate 101 of the power storage element 1, and the other part with the bent part as a boundary is the second part of the power storage element 1. It arrange | positions in the position corresponding to the wall 100d.

  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 1st connection part 310 is connected with this termination | terminus member 30 by screwing a nut to the volt | bolt penetrated to the through hole 300b of the termination | terminus member 30 and the 1st hole 313c of the 1st fixing | fixed 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 2nd connection part 311 is connected with this termination | terminus member 30 by screwing a nut to the volt | bolt penetrated to the through-hole 300b of the termination | terminus member 30 and the 2nd hole 313d of the 2nd fixing | fixed part 313b.

  The insulator 4 is made of an insulating material. The insulator 4 includes a pair of first insulating portions 40 disposed between each of the pair of first connection portions 310 and the spacer 2 (the inner spacer 2A and the outer spacer 2B), and a pair of second connection portions. 311 and a pair of second insulating portions 41 disposed between the spacers 2 (inner spacer 2A and outer spacer 2B).

  The first insulating portion 40 is long in the X-axis direction. The first insulating portion 40 is disposed between the power storage element 1 and the first connection portion 310 of the frame 3. That is, the first insulating portion 40 is bent in a direction orthogonal to the longitudinal direction. Then, one portion of the first insulating portion 40 with the bent portion as a boundary contacts one portion with the bent portion of the first connection portion 310 as a boundary. In addition, the other portion of the first insulating portion 40 with the bent portion as a boundary contacts the other portion with the bent portion of the first connecting portion 310 as a boundary.

  The second insulating portion 41 is long in the X-axis direction. The second insulating portion 41 is disposed between the power storage element 1 and the second connection portion 311 of the frame 3. That is, the second insulating portion 41 bends along a direction orthogonal to the longitudinal direction. Then, one portion of the second insulating portion 41 with the bent portion as a boundary comes into contact with one portion with the bent portion of the second connection portion 311 as the boundary. The other part of the second insulating portion 41 with the bent portion as a boundary contacts the other portion with the bent portion of the second connection portion 311 as the boundary.

  The insulator 4 according to the present embodiment has two third insulating portions 42. This will be described more specifically. In the insulator 4, the first end of the first insulating portion 40 and the first end of the second insulating portion 41, and the second end of the first insulating portion 40 and the second end of the second insulating portion 41 are the third insulating portion 42. Connected by

  As described above, according to the power storage device according to the present embodiment, the extending portion 212A of the facing portion 210A in the inner spacer 2A is adjacent in the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction or in the X-axis direction. It extends to the opposing portion 210B of the outer spacer 2B. Therefore, the extending portion 212A of the inner spacer 2A is in contact with the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction or the facing portion 210B of the outer spacer 2B adjacent in the X-axis direction.

  Further, the extending portion 212B of the facing portion 210B in the outer spacer 2B extends to the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction. Therefore, the extension part 212B of the facing part 210B of the outer spacer 2B is in contact with the facing part 210A of the adjacent inner spacer 2A in the X-axis direction.

  Thereby, the power storage device flows between the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction and between the facing portion 210A of the inner spacer 2A adjacent in the X-axis direction and the facing portion 210B of the outer spacer 2B. The cooling air is blocked by the extending portion 212A of the facing portion 210A in the inner spacer 2A and the extending portion 212B of the facing portion 210B of the outer spacer 2B.

  Therefore, in the power storage device, the flow of air from the end edge of the facing portion 210A of each spacer 2 toward the air flow path 203A, 202B side edge to the end edge of the facing portion 210A of each spacer 2 opposite to the airflow path 203A, 202B side is. Be disturbed. Thus, in the power storage device, the cooling air supplied to the ventilation paths 203A and 202B formed between the power storage elements 1 can be made difficult to leak to the outside.

  Further, in the power storage device according to the present embodiment, the portion where the extending portion 212A of the inner spacer 2A and the inclined surface 216A of the inner spacer 2A are in contact, and the extending portion 212A of the inner spacer 2A and the inclined surface 216B of the outer spacer 2B Each of the portions in contact with each other is inclined with respect to the Z-axis direction.

  Therefore, the power storage device further flows the air flow from the edge on the side of the ventilation path 203A, 202B of the facing portion 210A of each spacer 2 toward the edge on the opposite side of the ventilation path 203A, 202B of the facing portion 210A of each spacer 2. Can effectively block.

  And the extension part 212A of the opposing part 210A of the inner spacer 2 and the extension part 212B of the opposing part 210B of the outer spacer 2B have elasticity. Therefore, even if the interval between the opposing portions 210A of the internal spacer 2A or the interval between the opposing portion 210A of the internal spacer 2A and the opposing portion 210B of the external spacer 2B is narrow due to a manufacturing error or the like, The variation in the interval is absorbed by elastic deformation of the extension portion 212A of the opposite portion 210A and elastic deformation of the extension portion 212B of the opposite portion 210B of the outer spacer 2B.

  As described above, the power storage device has an inner space even if the distance between the facing portions 210A of the inner spacer 2A or the distance between the facing portion 210A of the inner spacer 2A and the facing portion 210B of the outer spacer 2B is reduced due to a manufacturing error or the like. Maintaining the state where the extended portion 212A of the spacer 2A is in contact with the facing portion 210A of the inner spacer 2A or the facing portion 210B of the outer spacer 2B, and the state where the extending portion 212B of the outer spacer 2B is in contact with the facing portion 210A of the inner spacer 2A Can do.

  Further, in the facing portion 210A of each internal spacer 2A, the pair of inclined surfaces 216A are formed such that the distance between them becomes narrower toward the bottom surface side of the recess 217A. Therefore, the inner spacer 2A becomes smaller as the distance between the facing portion 210A of the inner spacer 2A and the facing portion 210A of another inner spacer 2A adjacent in the other in the X-axis direction or the facing portion 210B of the outer spacer 2B becomes narrower. The pair of extending portions 212A or the pair of extending portions 212B of the outer spacer 2B are elastically deformed so that the distance between the tips of each other becomes narrow.

  Further, in the facing portion 210B of the other outer spacer 2B, the pair of inclined surfaces 216B are formed so that the distance between them becomes narrower toward the bottom surface side of the recess 217B. Therefore, as the distance between the facing portion 210B of the other outer spacer 2B and the facing portion 210A of another inner spacer 2A adjacent on the other side in the X-axis direction becomes narrower, the pair of extending portions 212A of the inner spacer 2A becomes closer to each other. It is elastically deformed so that the distance between the tips of the two becomes narrow.

  Therefore, as the distance between the facing portion 210A of the inner spacer 2A and the facing portion 210B of the outer spacer 2B becomes narrower, the power storage device has the extension portion 212A of the inner spacer 2A and the outer spacer 2B of the outer spacer 2B trying to return to the original spacing. The force of the extension part 212B becomes strong. Therefore, the power storage device is in a state where it can be viewed as if the spacers 2 adjacent in the X-axis direction are connected by the elastic body, and resistance to vibration is improved.

  The opposing portion 210A of the inner spacer 2A includes a plurality of (in this embodiment, two) extending portions 212A.

  Therefore, in the power storage device, the two extending portions 212A of the inner spacer 2A allow the air flowing between the pair of facing portions 210A from the edge on the airflow path 203A side of the facing portion 210A to the edge on the opposite side of the airflow path 203A. The flow is obstructed. Thereby, it is possible to more effectively suppress the cooling air from leaking to the outside of the power storage device through the pair of facing portions 210A.

  Further, the facing portion 210B of the outer spacer 2B includes a plurality (two in this embodiment) of extending portions 212B.

  Therefore, in the power storage device, the plurality of extending portions 212B of the outer spacer 2B are connected between the facing portion 210B of the outer spacer 2B and the facing portion 210A of the inner spacer 2A from the end edge on the airflow path 202B side of the facing portion 210B. Air flow toward the edge opposite to 202B is impeded. Thereby, it is possible to more effectively suppress the cooling air from leaking outside the power storage device through the space between the facing portion 210B of the outer spacer 2B and the facing portion 210A of the inner spacer 2A.

  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-described embodiment, the base 20A of the inner spacer 2A has a rectangular wave shape, thereby forming the ventilation path 203A between the base 20A and the power storage element 1. However, if the base 20A of the inner spacer 2A allows fluid to pass between the first surface and the electricity storage device 1 (between the second surface and the electricity storage device 1), the shape of the base 20A is a rectangular wave shape. It is not limited to a certain thing. Moreover, when it is not necessary to form the ventilation path 203A between the base 20A of the inner spacer 2A and the power storage element 1, the base 20A of the inner spacer 2A may be formed in a flat plate shape.

  In the above embodiment, each restricting portion 21A of the inner spacer 2A is formed at each corner of the base 20A. However, as long as the restricting portion 21A of the inner spacer 2A can determine the position of the power storage element 1 with respect to the base 20A, the position formed on the base 20A is not limited.

  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 attitude of the adjacent power storage element 1 and the attitude 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 facing portion 210A of the inner spacer 2A includes the pair of extending portions 212A, but is not limited thereto. For example, the facing portion 210A of the inner spacer 2A may include one extending portion 212A or three or more extending portions 212A. Furthermore, the facing portion 210A of the inner spacer 2A may include a plurality of pairs of extending portions 212A.

  Moreover, although the opposing part 210B of the external spacer 2B was provided with a pair of extended part 212B, it is not limited to this. For example, the facing portion 210B of the outer spacer 2B may include one extending portion 212B or three or more extending portions 212B. Further, the facing portion 210B of the outer spacer 2B may include a plurality of pairs of extending portions 212B.

  In the embodiment described above, the inclined surface 216A of the inner spacer 2A is inclined with respect to the X-axis direction and the Z-axis direction, but is not limited thereto. The inclined direction 216A of the inner spacer 2A is not particularly limited as long as the extending portion 212A of the inner spacer 2A or the extending portion 212B of the outer spacer 2B can contact the inclined surface 216A.

  In the above embodiment, the inclined surface 216B of the external spacer 2B is inclined with respect to the X-axis direction and the Z-axis direction, but the present invention is not limited to this. The inclined direction of the outer spacer 2B is not particularly limited as long as the extended portion 212A of the inner spacer 2A can contact the inclined surface 216B.

  In the above embodiment, the extending portion 212A of the inner spacer 2A is configured to contact the inclined surface 216A of the inner spacer 2A, but is not limited thereto. For example, the extending portion 212A of the inner spacer 2A may be configured such that the tip end abuts against the facing portion 210A of the inner spacer 2A (the bottom surface of the recess 217A) in the X-axis direction.

  Even in this case, the extended portion 212A of the inner spacer 2A contacts the facing portion 210A, so that the cooling air can hardly leak from between the facing portions 210A of the adjacent inner spacer 2A in the X-axis direction.

  Further, the extended portion 212B of the outer spacer 2B is also configured to contact the inclined surface 216A of the inner spacer 2A, but is not limited thereto. For example, the extending portion 212B of the outer spacer 2B may be configured such that the tip end abuts against the facing portion 210A of the inner spacer 2A (the bottom surface of the recess 217A) in the X-axis direction.

  Even in this case, since the extended portion 212B of the outer spacer 2B contacts the facing portion 210A of the inner spacer 2A, the cooling air hardly leaks between the facing portion 210B of the outer spacer 2B and the facing portion 210A of the inner spacer 2A. Become.

  In the embodiment described above, the inclined surface 216A of the inner spacer 2A is inclined with respect to the X-axis direction and the Z-axis direction, but is not limited thereto. For example, the inclined surface 216A of the inner spacer 2A may be configured by a plane in which a portion where the extending portion 212A of the inner spacer 2A or the extending portion 212B of the outer spacer 2B is in contact extends in the X-axis direction and the Y-axis direction.

  That is, the inclined surface 216A of the inner spacer 2A may be orthogonal to the Z-axis direction as long as the extended portion 212A of the inner spacer 2A or the extended portion 212B of the outer spacer 2B can contact.

  Furthermore, in the said embodiment, although the inclined surface 216B of the external spacer 2B was inclined with respect to the X-axis direction and the Z-axis direction, it is not limited to this. For example, in the inclined surface 216B of the outer spacer 2B, the portion of the inner spacer 2A that is in contact with the extending portion 212A may be configured by a plane that extends in the X-axis direction and the Y-axis direction.

  That is, the inclined surface 216A of the inner spacer 2A may not be inclined with respect to the X-axis direction and the Z-axis direction as long as the extended portion 212A of the inner spacer 2A can contact.

  In the above embodiment, the extending portion 212A of the inner spacer 2A has elasticity, but is not limited thereto. For example, the extension 212A of the inner spacer 2A may not have elasticity.

  In the above-described embodiment, the extending portion 212A of the inner spacer 2A has the contact surface 215A bent at an intermediate position in the X-axis direction, but is not limited thereto. For example, the extending portion 212A of the inner spacer 2A may be inclined with respect to the X-axis direction and the Z-axis direction throughout. That is, the contact surface 215A of the extending portion 212A of the inner spacer 2A may be configured by only the inclined surface 216A.

  In the above-described embodiment, the contact surface 215B is bent at an intermediate position in the X-axis direction in the extended portion 212B of the outer spacer 2B, but is not limited thereto. For example, the extending portion 212B of the outer spacer 2B may be inclined with respect to the X-axis direction and the Z-axis direction throughout. That is, the contact surface 215B of the extending portion 212B of the external spacer 2B may be configured only by the inclined surface 216B.

  Although not particularly mentioned in the above embodiment, the facing portion 210A of the inner spacer 2A may be configured to be in contact with the inclined surface 213A of the extending portion 212A. In addition, the facing portion 210A of the inner spacer 2A includes an inclined surface 213A of the extending portion 212A and an inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction (or an inclined surface 216B of the outer spacer 2B adjacent in the X-axis direction). Are preferably configured so as to be in contact with each other.

  Further, the facing portion 210B of the outer spacer 2B may also be configured to contact the inclined surface 213B of the extending portion 212B. Further, the facing portion 210B of the outer spacer 2B is preferably configured such that the inclined surface 213B of the extending portion 212B and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction are in contact with each other.

  In this way, the extending portion 212B and the inclined surface are formed such that the contact portion between the inclined surface 213B of the extending portion 212B of the outer spacer 2B and the facing portion 210A of the inner spacer 2A extends in a direction intersecting the Z-axis direction. 216A contacts. Accordingly, the air flow between the facing portions 212B and 210A from the end edge of the facing portion 210A on the side of the ventilation path 203A toward the edge on the side opposite to the ventilation path 203A is more effectively prevented.

  Further, the inclined surface 213A of the extending portion 212A and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction (or the inclined surface 216B of the outer spacer 2B adjacent in the X-axis direction) are brought into contact with each other, and the outer spacer When the inclined surface 216B of the extending portion 212B and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction are brought into contact with each other, the facing portion 210B of 2B has the inclined surfaces 213A, 216B and the inclined surface 216A. The extending portion (first inclined surface) and the other facing portion 210A (second inclined surface) are in contact with each other so that the contact portion extends in a direction intersecting the second direction. Thereby, the flow of the air from the edge on the airflow path 203A side of the facing part 210A toward the edge on the opposite side of the airflow path 203A is more effectively prevented between the facing parts 210A.

  In this case, as shown in FIG. 10, the extending portion 212 </ b> A of the inner spacer 2 </ b> A has an inclined surface 213 </ b> A and an inclined surface 216 </ b> A of the inner spacer 2 </ b> A adjacent in the X-axis direction (or the outer spacer 2 </ b> B adjacent in the X-axis direction). It is preferable that the angle α formed with the inclined surface 216B) is configured such that 0 ° <α.

  Further, the extending portion 212B of the outer spacer 2B is configured such that an angle α formed by the inclined surface 213B and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction is 0 ° <α. preferable.

  When the inclined surfaces 212A and 213B and the inclined surface 216A are parallel, a gap may be generated between the inclined surfaces 212A and 213B and the inclined surface 216A due to a manufacturing error in manufacturing the spacer. However, as in the above configuration, if the angle α is larger than 0 °, that is, if the first inclined surfaces 212A and 213B and the inclined surface 216A are not parallel, the generation of the gap due to the manufacturing error can be prevented. it can.

  Further, the extending portion 212A of the inner spacer 2A is an angle formed by the inclined surface 213A and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction (or the inclined surface 216B of the outer spacer 2B adjacent in the X-axis direction). More preferably, α is configured such that 0 ° <α ≦ 15 °.

  The extending portion 212B of the outer spacer 2B is configured such that an angle α formed by the inclined surface 213B and the inclined surface 216A of the inner spacer 2A adjacent in the X-axis direction satisfies 0 ° <α ≦ 15 °. More preferably.

  Although not particularly mentioned in the above embodiment, the extended portion 212A of the inner spacer 2A is opposite to the one end from the one end in the Y-axis direction of the inclined surface 216A of the inner spacer 2A or the inclined surface 216B of the outer spacer 2B. It is preferable to contact over the other end.

  Further, it is preferable that the extended portion 212B of the outer spacer 2B is in contact with one end in the Y-axis direction of the inclined surface 216A of the inner spacer 2A from the other end opposite to the one end.

  In the above embodiment, the extending portion 212A of the inner spacer 2A is in contact with a part of the inclined surface 216A of the inner spacer 2A or a part of the inclined surface 216B of the outer spacer 2B. It is not a thing. For example, the extending portion 212A of the inner spacer 2A may be in contact with the entire area of the inclined surface 216A of the inner spacer 2A or the entire area of the inclined surface 216B of the outer spacer 2B.

  In this way, in the entire region between the opposing portions 210A in the cooling air flow direction, the air that travels between the opposing portions 210A from the edge on the airflow path 203A side of the opposing portion 210A toward the edge opposite to the airflow path 203A. Flow is hindered. Thereby, it is possible to more effectively suppress the cooling air from leaking outside the power storage device through the pair of opposed portions 210A.

  DESCRIPTION OF SYMBOLS 1 ... Power storage element, 2 ... Spacer, 2A ... Internal spacer, 2B ... External spacer, 3 ... Holding member, 4 ... Insulator, 10 ... Case, 11 ... External terminal, 20 ... Base, 20A ... Base, 20B ... Base, 21A ... regulator, 21B ... regulator, 22B ... fitting part, 23B ... shaft, 30 ... terminal member, 31 ... frame, 31A ... first frame, 31B ... second frame, 40 ... first insulating part, 41 ... 2nd insulation part, 42 ... 3rd insulation part, 100 ... Case main body, 100a ... Closure part, 100b ... Trunk part, 100c ... 1st wall, 100d ... 2nd wall, 101 ... Cover plate, 200A ... 1st contact Part, 200B ... projecting part (internal contact part), 201A ... second contact part, 201B ... connecting part, 202A ... connecting part, 202B ... ventilation path, 203A ... ventilation path, 210A ... first regulating piece, 210B ... first One regulation piece, 11A ... second restricting piece, 211B ... second restricting piece, 212A ... extended portion, 212B ... extended portion, 213A ... inclined surface (inclined surface of extending portion), 213B ... inclined surface (inclined surface of extending portion) ), 214A ... extended surface, 214B ... extended surface, 215A ... contact surface, 215B ... contact surface, 216A ... inclined surface, 216B ... inclined surface, 217A ... recessed portion, 217B ... recessed portion, 300 ... pressure contact portion, 300a ... inserted Insertion hole, 300b ... through hole, 310 ... first connection part, 311 ... second connection part, 312 ... support part, 312a ... first support part, 312b ... second support part, 313 ... fixed part, 313a ... first Fixing part, 313b ... second fixing part, 313c ... first hole part, 313d ... second hole part, α ... angle

Claims (9)

At least one power storage element;
A spacer that is adjacent to the electricity storage element, and that forms a ventilation path through which cooling air can flow between the electricity storage element, and
The spacer has a facing portion facing the adjacent spacer across the power storage element at a position facing the ventilation path and adjacent to the power storage element in the flow direction of the cooling air in the ventilation path. And
One of the opposing portions of the pair of opposing portions of the spacers disposed on both sides of the power storage element has an extending portion that extends toward the other opposing portion of the pair of opposing portions,
The power storage device, wherein the extension portion is in contact with the other facing portion. The other facing portion has an inclined surface that is inclined with respect to a first direction in which the pair of facing portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The power storage device according to claim 1, wherein the extending portion is in contact with at least a part of the inclined surface.   The power storage device according to claim 2, wherein the extension portion is elastically deformable by contact with the inclined surface. The other opposing portion has a pair of the inclined surfaces,
The pair of inclined surfaces face each other with an interval in the second direction so that the interval becomes narrower with distance from the one opposing portion along the direction in which the pair of opposing portions face each other.
The one facing portion has a pair of the extending portions at a position facing the pair of inclined surfaces,
The pair of extending portions includes a pair of inclined portions in which a distance between tips of the pair of extending portions is smaller than a distance between the inclined surfaces at an end portion on the one facing portion side of the pair of inclined surfaces. 4. The power storage device according to claim 3, wherein the power storage devices are arranged at an interval in the second direction so as to be larger than an interval between the inclined surfaces at an end portion of the surface opposite to the one opposing portion. The one facing portion has a plurality of the extending portions,
5. The power storage device according to claim 2, wherein the other facing portion has a number corresponding to the plurality of extending portions of the inclined surface. The extending portion has an inclined surface that is inclined with respect to a first direction in which the pair of opposed portions are opposed to each other and a second direction orthogonal to the flow direction of the cooling air,
The power storage device according to claim 1, wherein the other facing portion is in contact with at least a part of the inclined surface of the extending portion. The extending portion has a first inclined surface that is inclined with respect to a first direction in which the pair of opposed portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The other facing portion has a second inclined surface that is inclined with respect to a first direction in which the pair of facing portions face each other and a second direction orthogonal to the flow direction of the cooling air,
The power storage device according to claim 1, wherein the first inclined surface is in contact with at least a part of the second inclined surface.   The power storage device according to claim 7, wherein an angle α of the second inclined surface with respect to the first inclined surface is 0 ° <α.   The power storage device according to any one of claims 1 to 8, wherein the extending portion is in contact with the other facing portion in the entire area of the other facing portion in the flow direction of the cooling air.