Battery and method for manufacturing the same

Abstract

To provide a battery having high tracking-resistance and a high insulation-performance and a method of fabricating the battery.SOLUTION: A battery comprises an outer shell 5 housing a power generation element. The outer shell 5 has a terminal port 15 at a part thereof. The battery comprises a terminal member 13 that is connected to the power generation element inside of the outer shell 5 and that has an exposed face 8 exposed to outside of the outer shell 5 at the terminal port 15, and an insulation resin 10 that insulates between the terminal member 13 at the terminal port and the outer shell 5 and closes the gap therebetween. The terminal member 13 has the exposed surface 8, a wall surface 16 facing an edge of the terminal port 15, and a boundary region 17 that is a boundary between the exposed surface 8 and the wall surface. The insulation resin 10 covers a whole circumstance of the edge of the terminal port 15 throughout an overall thickness of the outer shell 5, and covers a whole circumstance of at least a portion of the outer shell 5 of the wall surface 16 in the thickness direction but does not cover the boundary region 17.SELECTED DRAWING: Figure 3

Claims

1. A battery in which a power generation element is housed in an outer casing and a terminal port is formed in a part of the outer casing, A terminal member having an exposed surface that is connected to the power generation element inside the outer casing and exposed to the outside of the outer casing at the terminal opening, The terminal has an insulating resin that insulates the gap between the terminal member and the outer casing at the terminal opening and seals the gap between them. In addition to the exposed surface, the terminal member has The wall surface facing the edge of the terminal opening, It has a boundary region which is an inclined surface or a rounded shape at the boundary between the exposed surface and the wall surface, The insulating resin is The entire circumference of the edge of the terminal opening is covered over the entire thickness of the outer casing, At least a portion of the wall surface in the thickness direction of the exterior body is covered over its entire circumference, A battery having a shape that does not cover the aforementioned boundary region.

2. The battery according to claim 1, wherein the insulating resin is The top portion outside the outer surface of the aforementioned exterior body, A battery having a shape that is recessed inward from the top and has a recess that forms a groove shape around the entire circumference of the exposed surface between at least the boundary region of the terminal member and the recess.

3. The battery according to claim 2, The aforementioned insulating resin is a base resin containing glass fibers. A battery having a resin coating layer covered with the base resin on at least the portion of the surface of the insulating resin that faces the recess.

4. The battery according to claim 3, A battery having a hardened layer with higher hardness than the base resin on the surface of the insulating resin, excluding the recessed portion.

5. A method for manufacturing a battery in which a power generation element is housed in an outer casing and a terminal port is formed in a part of the outer casing, A terminal member connected to the power generation element and having an exposed surface is set relative to the terminal opening such that the exposed surface is exposed to the outside of the outer casing. An insulating resin is molded to insulate the gap between the terminal member and the outer casing at the terminal opening and seal the gap between them. In addition to the exposed surface, the terminal member has The wall surface facing the edge of the terminal opening, It has a boundary region which is an inclined surface or a rounded shape at the boundary between the exposed surface and the wall surface, During the molding of the insulating resin, the insulating resin is used The entire circumference of the edge of the terminal opening is covered over the entire thickness of the outer casing, The shape is such that at least a portion of the wall surface in the thickness direction of the exterior body is covered over its entire circumference, A method for manufacturing a battery, comprising, after molding the insulating resin, etching and removing a portion of the insulating resin that faces the wall surface by laser irradiation, thereby creating a shape that does not cover the boundary region.

6. A method for manufacturing a battery according to claim 5, During the molding of the insulating resin, a top portion is formed on the insulating resin that is outside the outer surface of the outer casing. A method for manufacturing a battery, wherein, during etching by laser irradiation, a recess is formed in the insulating resin that is recessed inward from the top and forms a groove shape around the entire circumference of the exposed surface between it and at least the boundary region of the terminal member.

7. A method for manufacturing a battery according to claim 6, As the insulating resin, a resin containing glass fibers in the base resin is used. A method for manufacturing a battery, wherein a resin coating layer covered with the base resin is formed on at least the portion of the surface of the insulating resin facing the recess by etching by laser irradiation.

8. A method for manufacturing a battery according to claim 7, A method for manufacturing a battery, comprising performing the laser irradiation etching on parts of the insulating resin other than the recesses, thereby forming a hardened layer on the surface of the insulating resin other than the recesses, which is harder than the base resin.

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