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. 28, 2023
Filed:
Dec. 06, 2019
Lg Chem, Ltd., Seoul, KR;
Han Young Lee, Daejeon, KR;
Ji Su Lee, Daejeon, KR;
Abstract
A secondary battery according to an embodiment of the present invention for solving the above problems includes: an electrode assembly formed by alternately stacking an electrode and a separator; a battery case accommodating the electrode assembly within a cup part of the battery case; a piezoelectric element disposed outside the cup part, the piezoelectric element being configured to receive a pressure when the battery case expands in volume, thereby supplying power to the piezoelectric element; and a punching part that has a sharp end that extends toward a target location on the battery case, the punching part being configured to punch a hole in the target location of the battery case when the power is applied to the piezoelectric element.