Battery with charge control circuitry

Details Battery with charge control circuitry Battery with charge control circuitry

1997-05-05

1999-05-25

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320148, H01M 1044, H01M 1046

Patent

active

059072326

ABSTRACT:
Circuitry is added to charge storage devices including batteries which creates or enhances a minus delta V type of termination signal pattern to trigger a battery charger to terminate the battery charging. Circuitry, which is responsive either to a voltage or to a temperature, causes a switch to connect a load across the terminals of a battery to cause a voltage drop. The voltage drop triggers circuitry within the battery charger to terminate charging. For some applications, additional circuitry is added to cause a second switch to open to remove the load from the terminals upon the occurrence of a second specified event. The second specified event si defined by a specified voltage, temperature, or elapsed time value.

REFERENCES:
patent: 5140251 (1992-08-01), Wu
patent: 5349282 (1994-09-01), McClure
patent: 5518832 (1996-05-01), Fernandez et al.
patent: 5717314 (1998-02-01), Wakefield
Garrett, S.; "Apparatus for Charging a Lithium Ion Battery in a Nickel System Charger"; Motorola Technical Developments; Aug. 1996.

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