| 摘要 |
PROBLEM TO BE SOLVED: To efficiently charge with power generated by a vehicle while having a simple circuit configuration, and efficiently supply power to be charged on a vehicle side.SOLUTION: In a vehicular battery system, a lead-acid battery 1 and a sub-battery 2 are connected to each other in parallel. In this battery system, the sub battery 2 has a character of open-circuit voltage/depth of discharge where the sub battery has a chargeable depth of discharge when the lead-acid battery 1 is at the upper limit voltage thereof, while the sub battery has a dischargeable depth of discharge when the lead-acid battery 1 is at the lower limit voltage thereof. |
