The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2015
Filed:
Nov. 29, 2011
Jinsoo Lee, Daejeon, KR;
Kilyoung Lee, Daejeon, KR;
Jin Kim, Daejeon, KR;
Soonho Ahn, Seoul, KR;
Joo-hwan Sung, Daejeon, KR;
Jinsoo Lee, Daejeon, KR;
Kilyoung Lee, Daejeon, KR;
Jin Kim, Daejeon, KR;
Soonho Ahn, Seoul, KR;
Joo-Hwan Sung, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
A prismatic secondary battery includes an electrode assembly having a cathode, an anode, and a separator mounted in a prismatic battery case in a sealed state, the battery case including a hexahedral case body open at the top thereof, the hexahedral case body being made of a metal material, and a case cap coupled to the open top of the case body, the case cap having an electrode terminal, wherein the case body is provided at a region exhibiting a stress distribution equivalent to 40% or less of the maximum stress of the case in a high pressure state with a line-shaped safety groove configured to be ruptured when high pressure occurs in the battery, and the safety groove is configured such that a residual thickness of the case body is decreased toward the middle from opposite ends of the safety groove in the longitudinal direction.