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1. (WO2018183828) OVERCHARGE PROTECTION OF BATTERIES USING CURRENT INTERRUPT DEVICES

Pub. No.:    WO/2018/183828    International Application No.:    PCT/US2018/025375
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Mar 31 01:59:59 CEST 2018
IPC: H01M 2/34
H01M 10/056
Applicants: 24M TECHNOLOGIES, INC.
FUKUSHIMA, Takaaki
CHENG, Junzheng
Inventors: FUKUSHIMA, Takaaki
CHENG, Junzheng
WOODFORD, William
OTA, Naoki
DISKO, Jeffry
Title: OVERCHARGE PROTECTION OF BATTERIES USING CURRENT INTERRUPT DEVICES
Abstract:
A battery system includes a main electrochemical cell that includes a cathode and an anode, a cathode tab electrically coupled to the cathode, and an anode tab electrically coupled to the anode. A second electrochemical cell is electrically coupled to the cathode tab and the anode tab. An interrupt device, such as a bi-stable metal disc, is operably coupled to the second electrochemical cell and at least one of the cathode tab or the anode tab. Upon overcharging of the main electrochemical cell, the voltage between the cathode tab and the anode tab causes the second electrochemical cell to generate gases that triggers the interrupt device, which in turn disconnects at least one of the cathode tab or the anode tab, thereby protecting the main electrochemical cell from further damages.