| 摘要 |
PURPOSE:To provide an auxiliary battery charger for electric automobile in which overcharge (under high temperature) and undercharge (under low temperature) due to the temperature variation of the auxiliary battery are eliminated. CONSTITUTION:The auxiliary battery charger comprises a main battery 31 producing the driving power for traveling, an auxiliary battery 32 for operating the auxiliary machines in a vehicle, a DC-DC converter 1 for charging the auxiliary battery 32 with the voltage of the main battery 31, and a thermister 9 for detecting the temperature variation of the auxiliary battery 32, wherein an output signal from the thermister is fed to the DC-DC converter 1 and the output voltage therefrom is varied thus setting the charging voltage of the auxiliary battery 32 at a predetermined level corresponding to the temperature variation. |
