Patent ID: 9030167
Filing Date: 2015-05-12
Classification: H01M,H02J,Y02E

Abstract:
1. A power source apparatus comprising: a plurality of battery packs having a plurality of battery cells connected in parallel; a plurality of battery units having the plurality of battery packs connected in series; and a plurality of battery units connected in parallel with respect to each other; first equalizing circuits that control remaining charge capacity variation between each battery unit; second equalizing circuits that control remaining charge capacity variation among battery packs that make up each battery unit; parallel connecting switches between each battery unit and an output line; and a switch control circuit that controls the parallel connecting switches and first equalizing switches, wherein each first equalizing circuit is made up of a first current limiting resistor connected in series with one of the first equalizing switches, and each first equalizing circuit is connected between each battery unit and the output line in parallel with each parallel connecting switch, wherein at the time of connection of battery units to a load, when a detected current from the battery units to the load is greater than a set value, the switch control circuit turns the parallel connecting switches OFF and turns the first equalizing circuits ON to limit surge current with the first current limiting resistors, and when the detected current is less than or equal to the set value, the switch control circuit turns the parallel connecting switches ON and turns the first equalizing circuits OFF.