BATTERY CASE
First Claim
1. A battery case in which a breakage groove for a safety valve is formed in a plate part constituting any surface of a case formed by machining a metal plate, the battery case comprising:
- a first recessed part, which is indented inward with respect to the case and is formed in the plate part, andwherein the breakage groove is formed in a middle or substantially the middle of a bottom part of the first recessed part.
1 Assignment
0 Petitions
Accused Products
Abstract
A battery case provided with a safety valve (4) in which a breakage groove (45) is used, wherein in order to stabilize the operation pressure, a lid (2) of the battery case has formed thereon: a thin plate portion (30) obtained by thinning a plate part (3); and a first recessed part (40) comprising a curved part (44) in which the thin plate portion (30) is indented inward, with respect to the case, in a curved shape. The breakage groove (45) for the safety valve (4) is formed at the bottom part (440) of the curved part (44). A first connecting portion (46) and a second connecting portion (47) of the plate part (3), which connect to the curved part (44) on both sides flanking the curved part (44), are at positions protruding toward the outside of the case from the plate part (3).
-
Citations
13 Claims
-
1. A battery case in which a breakage groove for a safety valve is formed in a plate part constituting any surface of a case formed by machining a metal plate, the battery case comprising:
-
a first recessed part, which is indented inward with respect to the case and is formed in the plate part, and wherein the breakage groove is formed in a middle or substantially the middle of a bottom part of the first recessed part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification