| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply management device for electric vehicles, which can obtain high output characteristics without sacrificing the service life of a secondary battery. SOLUTION: The power supply management device 30 controls charging and discharging so that the charging rate of the secondary battery 10 is equal to a specified target rate or fall within a prescribed range between the upper- limit and the lower-limit. When the temperature of the secondary battery 10 rises, a battery temperature detecting means 33 detects this and the power supply management device 30 controls secondary battery 10, so as to reduce the target rate or the upper-limit. Thus since the secondary battery 10 tends to be discharged, average charging rate is reduced, its operating life is prolonged. Meanwhile, even though the average charging rate is reduced, since the battery temperature is high and the output density is high, the required high output is ensured.
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