Method and apparatus for controlling the charging of a rechargea

Details Method and apparatus for controlling the charging of a rechargea Method and apparatus for controlling the charging of a rechargea

1997-03-11

1999-01-26

Tso, Edward

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320153, H01M 1044

Patent

active

058642200

ABSTRACT:
In order to optimally control the charging of a rechargeable battery of one or more cells to ensure that full and rapid charge is achieved without damaging the battery, a maximum safe value (or sequence of values during the charging process) for one or more charging parameters is determined during a test charge, and subsequent charges of the battery are performed without exceeding the predetermined maximum value(s) for the charging parameter(s). Among the charging parameters contemplated for use are: the charging voltage potential placed across the battery terminals, the charging current supplied to the battery, the temperature of the battery cell and internal pressure of the battery cell as well as rates of changes of the parameters. In accordance with apparatus for practicing the invention, the value(s) of one or more predetermined maximum parameters are stored, and the corresponding actual charging parameter values are measured during the charging process and compared to the stored values to develop signals for controlling the charging process and thereby maintain the monitored parameter(s) no higher than the predetermined maximum value(s).

REFERENCES:
patent: 3852652 (1974-12-01), Jasinski
patent: 4755735 (1988-07-01), Inakagata
patent: 5122722 (1992-06-01), Goedken et al.
patent: 5686815 (1997-11-01), Reipur et al.
Delaney et al. "Development of Lead-Acid Battery Thermal Management System," Proceeding 19th Intersociety Energy Conversion Conference, San Francisco CA, p. 779, Aug. 1984.

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