Method for monitoring and controlling the charging of gastight alkaline rechargeable batteries
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United States of America Patent
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May 21, 2002
Grant Date -
Mar 21, 2002
app pub date -
Aug 29, 2001
filing date -
Sep 15, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method for monitoring the charging of gastight alkaline rechargeable batteries, the characteristics of the critical charging voltage (U.sub.crit) on a rechargeable battery are determined as a function of the charging current (I) for various temperatures (T) and are linearized by means of a function in the form A(I).times.T+B(I). The value pairs A and B are stored as parameter arrays in a battery management system, and during operation of a physically identical rechargeable battery which is to be monitored, the associated critical charging voltage is calculated by measuring the temperature and charging current and is used to control the charging of the rechargeable battery. On reaching the critical charging voltage (U.sub.crit) which corresponds to the critical state of charge (LZ.sub.crit), the value of the critical state of charge can be calculated by measuring the current (I) and temperature (T).
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