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1. (WO1998050967) CURRENT INTERRUPT DEVICE FOR SECONDARY BATTERIES

Pub. No.:    WO/1998/050967    International Application No.:    PCT/US1998/008953
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Fri May 01 01:59:59 CEST 1998
IPC: H01M 2/34
Applicants: MOTOROLA INC.
Inventors: DECKER, Edward, V.
THOMAS, George
DESAI, Venus
MEADOWS, Vernon
BRESIN, Mark
Title: CURRENT INTERRUPT DEVICE FOR SECONDARY BATTERIES
Abstract:
A secondary battery (100) includes a cell (110) having a positive terminal (115) and a negative terminal (120), a device (130, 140) for coupling the positive terminal (115) to the negative terminal (120) in response to swelling of the cell (100), and a fuse (125) coupled between the positive terminal (115) and the negative terminal (120) in response to swelling of the cell (110). According to another aspect of the present invention, a secondary battery (700) has external contacts (150, 155) and includes a cell (110) having a positive terminal (115) and a negative terminal (120) that are coupled to the external contacts (150, 155) during normal cell operation. In response to swelling of the cell (110), a device (705, 720, 725, 730, 735) decouples at least one of the positive and negative terminals (115, 120) from at least one of the external contacts (150, 155) in response to swelling of the cell (110).