Chemistry: electrical current producing apparatus – product – and – Cell support for removable cell
Reexamination Certificate
2005-08-23
2010-06-29
Rhee, Jane (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Cell support for removable cell
C320S134000
Reexamination Certificate
active
07745040
ABSTRACT:
An object of the present invention is to provide the device for protecting a secondary battery safely from overvoltage and overheating caused by the overcharge by using simple safety device, which provides a contacted safety device which connects between a constant voltage element showing a discharge characteristic in the state of overvoltage and a MIT (metal insulator transition) element showing a discharge characteristic in the state of overheating. Each of the constant voltage element and the MIT element are connected in parallel between a cathode lead and an anode lead of the secondary battery. The contacted safety device has a characteristic combining a discharge/heat dissipation characteristic of the constant voltage element and a discharge characteristic of the MIT element which immediately responds to the heat dissipation of the constant voltage element, resulting in effect of preventing overcharge advantageously since the contacted safety device makes discharge in terms of 2 factors of voltage and temperature in case of overcharge.
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International Search Report; International Application No. PCT/KR2005/002356/ International Filing Date Jul. 21, 2005; Applicant's File Reference FPC05012-PCT; Date of Mailing Sep. 28, 2005; 3 pages.
European Supplementary Search Report for Application No. 05780781.0-2119; Dated: Jun. 6, 2008.
Chang Sung Kyun
Cho Jeong Ju
Ha Soo Hyun
Lee Jae Hyun
Lee Joon Hwan
Cantor & Colburn LLP
LG Chem Ltd.
Rhee Jane
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