| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery system including controlling means for stably coupling batteries, and a battery coupling method.SOLUTION: A battery rack 220 which is a module configured by coupling a plurality of battery trays in parallel, includes: a first switch 231 provided on a path between a second battery tray 211-2 and the battery rack 220; a second switch 233 coupled to the first switch 231 in parallel; a resistance element 235 coupled to the second switch 233 in series; and a battery management portion BMS which turns on the second switch 233 so as to couple the second battery tray and the module, and turns on the first switch 231 when voltage difference between the voltage of a second battery and the module reaches a value set in advance. |
