Energy storage device

Abstract

This power storage device comprises a power storage element unit containing multiple power storage elements, an exterior body for accommodating the power storage element unit, and a plate-like reinforcement member. The reinforcement member is fixed in an attitude along a fixation surface, that is, an inner surface or an outer surface of the exterior body. When viewed from a direction perpendicular to the fixation surface, the reinforcement member has a larger outer shape than the outer shape of the power storage element unit.

Claims

1. The device comprises a power storage element unit including multiple power storage elements, an outer casing housing the power storage element unit, and a plate-shaped reinforcing member fixed in a position along a fixed surface which is the inner or outer surface of the outer casing. When viewed from a direction perpendicular to the fixed surface, the outer shape of the reinforcing member is larger than the outer shape of the energy storage element unit. The exterior body has a protrusion integrally provided with the exterior body, the protrusion having a projection that extends from the fixed surface, The reinforcing member has an opening that opens to the opposing surface which is the surface opposite to the fixing surface, and the protrusion is inserted into the opening and fixed to the fixing surface. Energy storage device.

2. When viewed from a direction perpendicular to the fixed surface, the outer shape of the exterior body is larger than the outer shape of the reinforcing member. The energy storage device according to claim 1.

3. The fixing surface is the inner surface of the exterior body, and the reinforcing member is disposed inside the exterior body. The energy storage device according to claim 1 or 2.

4. The aforementioned protrusion has a base portion that protrudes from the fixed surface and a tip portion that further protrudes from the base, When the protrusion is viewed from the direction of its projection, the outer shape of the tip is smaller than the outer shape of the base. The opening of the reinforcing member is formed to a size into which the tip portion can be inserted, but into which the base portion cannot be inserted. The energy storage device according to claim 1 or 2.

5. As the reinforcing member is supported by the base, a gap is formed between the reinforcing member and the fixing surface. Furthermore, it includes an adhesive member that is placed in the gap and bonds the reinforcing member and the fixing surface, The energy storage device according to claim 4.

6. The aforementioned opening is provided by penetrating the reinforcing member in the thickness direction, The aforementioned protrusion is formed to a size that protrudes from the opening when inserted into the opening, and is positioned opposite the energy storage element. The energy storage device according to claim 1 or 2.

7. The aforementioned opening is provided by penetrating the reinforcing member in the thickness direction, The aforementioned protrusion is formed to a size that does not protrude from the opening when inserted into the opening. The energy storage device according to claim 1 or 2.

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