Patent ID: 7884577
Filing Date: 2011-02-08
Classification: B60L,H01M,Y02E,Y02T

Abstract:
1. A vehicle battery pack equipped with a temperature controller for a secondary battery, comprising: a heating device for heating a secondary battery formed by combination of a plurality of battery modules; a temperature detection section for detecting a temperature of the secondary battery; a voltage change detection section for detecting the change in an open circuit voltage of the secondary battery within a predetermined period of time wherein a voltage change represents a differential value in voltage of a previously detected voltage and a currently detected voltage; and a heat quantity control section for activating the heating device when a temperature detected by the temperature detection section at the time of startup of the vehicle is a predetermined reference lower-limit temperature required for the secondary battery to exhibit desired recharging-and-discharging capability or less and for suppressing heating operation of the heating device when the voltage change exceeds an allowable value in accordance with the voltage change detected by the voltage change detection section after the heating device has performed heating.