Safety switch for lithium ion battery

Details Safety switch for lithium ion battery Safety switch for lithium ion battery

1997-07-24

1999-06-01

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320136, H01M 1046, H02J 700

Patent

active

059091037

ABSTRACT:
A safety switch for a lithium ion cell to prevent exceeding voltage limits associated with over-discharge and over-charging of a lithium ion cell. The safety switch includes at least one insulated gate transistor device having a low gate threshold voltage and a high transconductance to provide a power switch having a very sharp transition from an electrically conductive state to an electrically non-conductive state. The safety switch includes at least one gate voltage control circuit that does not consume power during quiescent periods or period of non-use.

REFERENCES:
patent: 5539299 (1996-07-01), Fernandez et al.
patent: 5547782 (1996-08-01), Dasgupta et al.
patent: 5568039 (1996-10-01), Fernandez
patent: 5576611 (1996-11-01), Yoshida
patent: 5590419 (1996-12-01), Shimo
patent: 5604415 (1997-02-01), Vashi et al.
patent: 5629542 (1997-05-01), Sakamoto et al.
patent: 5635821 (1997-06-01), Smith
patent: 5672952 (1997-09-01), Szepesi
patent: 5686814 (1997-11-01), Wierzbicki

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