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|1. (WO2015045761) BATTERY SYSTEM|
|Applicants:||NISSAN MOTOR CO., LTD.
A battery system comprises: a main battery (1) that can be charged and discharged; a cartridge (2) including an air battery (8) that is in an inactive state; a cartridge holder (3) for detachably holding the cartridge (2) and outputting the power of the air battery (8); a battery activation means (4) for activating the air battery (8) in the cartridge (2) held by the cartridge holder (3); and a system control means (6). Since the battery system is equipped with the main battery (1) and the replaceable air battery (8) that can be arbitrarily started to be discharged, the battery system can be used in a long term and is enhanced in convenience.