Battery case and battery
A battery case includes a case main body ( 20 ), a sealing body that seals an opening of the main body, and an insulating body ( 40 ) that is disposed at a part where the case body ( 20 ) and the sealing body are in contact with each other. In the battery case, an open end ( 22 ) of the case body ( 20 ) is crimped to the sealing body, and a dent ( 36 ) is formed in the sealing body by pressing the open end ( 22 ) against the sealing body.
1. A battery case comprising:
a case main body;
a sealing body that seals an opening of the case main body; and
an insulating body that is disposed at a part where the case main body and the sealing body are in contact with each other,
wherein an open end of the case main body is crimped into a dent in the sealing body.
2. The battery case according to claim 1 , wherein the insulating body contains filler harder than the sealing body.
3. The battery case according to claim 1 , wherein the insulating body is a resin coating film applied to the inner surface of the case main body.
4. The battery case according to claim 1 , wherein a recess into which the open end is fitted is formed in advance in a part of the sealing body against which the open end is pressed.
5. The battery case according to claim 1 , wherein a corner of the open end that is pressed against the sealing body is chamfered.
6. A battery comprising:
a battery case according to claim 1 ;
an electrode assembly housed in the battery case; and
an electrolyte housed in the battery case.
7. The battery case according to claim 1 , wherein the sealing body has an upper surface and an annular dent is formed in said upper surface.
8. The battery case according to claim 1 , wherein the case main body has a degree of hardness and wherein the sealing body has a degree of hardness that is less than or equal to the degree of hardness of the case main body.
9. The battery case according to claim 1 , wherein the case main body has a degree of hardness and wherein the filler has a degree of hardness that is higher than the degree of hardness of the case main body.
10. The battery case according to claim 1 , wherein the insulating body has a total volume and wherein the filler has a contained amount of 5 vol % to 70 vol % of the total volume of the insulating body.