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CAPACITY ESTIMATING METHOD FOR LITHIUM ION BATTERY, METHOD AND APPARATUS FOR JUDGING DETERIORATION AND LITHIUM ION BATTERY PACK
CAPACITY ESTIMATING METHOD FOR LITHIUM ION BATTERY, METHOD AND APPARATUS FOR JUDGING DETERIORATION AND LITHIUM ION BATTERY PACK
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机译:锂离子电池的容量估算方法,判断劣化和锂离子电池组的方法及装置
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摘要
PROBLEM TO BE SOLVED: To provide a simple method for estimating the capacity of a lithium ion battery, a simple method and an apparatus for judging the deterioration of the lithium ion battery, and a lithium ion battery pack provided with a means which estimates the capacity of the battery and gives warning of the deterioration of the battery as occasion demands. SOLUTION: A capacity estimating method for a lithium ion battery finds a time interval (t) from the point of time when a charging voltage in the course of constant-current(CC) charging by a charging current Ic reaches a preset voltage Vs, up to the point of time when a charging condition is switched from the constant current(CC) charging over to constant voltage (CV) charging, when the lithium ion battery is charged by a constant-current constant-voltage system; and calculates an estimated capacity C of the lithium ion battery using the time internal (t). A method and an apparatus are provided for judging the deterioration of the lithium ion battery by the method. A lithium ion battery pack provided with a means for executing the capacity estimating method is formed.
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