| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem in which even when discharge power of a high-voltage battery 10 is limited by discharge power boundary values Wout10s and Wout2s, at least one of terminal voltages across battery cells C11-Cnm may be lower than a lower-limit voltage VthL. <P>SOLUTION: In a guard processing device for a battery pack, a battery ECU 52 calculates a minimum value of absolute values of currents with which the battery cells C11-Cnm reach a lower-limit voltage VthL respectively, on the basis of terminal voltages across the battery cells C11-Cnm and a charging/discharging current I, and then calculates the respective terminal voltages across the battery cells C11-Cnm when the currents having the minimum value flow and sums up the voltages, and then multiplies the total voltage by the minimum value to calculate a discharge power boundary base value BWout. The discharge power boundary base values Wout10s and Wout2s as final discharge power are defined as values subjected to guard processing using the discharge power boundary base value BWout. <P>COPYRIGHT: (C)2013,JPO&INPIT |
