Storage battery voltage control apparatus

摘要

Eight storage battery cells 111 to 118 making up a storage battery cell group 2 can be connected selectively to a voltage-correcting storage battery 12 through nine cell change-over switches 131 to 139, four polarity-inverting switches 141 to 144 and a current-limiting resistor 15. When the voltages of two or more of the storage battery cells 111 to 118 are different, the voltages of each of the storage battery cells 111 to 118 can be equalized by then transferring the charge from a storage battery cell high in voltage to the voltage-correcting storage battery 12 and by transferring the charge of that voltage-correcting storage battery 12 to a storage battery cell low in voltage. As a result, the voltage difference due to the performance variations among the individual storage battery cells 111 to 118 can be obviated thereby to increase the working voltage range of the storage battery cell group 2 as a whole.