| 摘要 |
A voltage equalizer for a battery pack includes equalization switches (SW1 to SW3) provided corresponding to respective battery blocks (BT1 to BT3, BT11 to BT13) that construct the battery pack (23, 23a), an equalization controlling unit (15), and an equalization diagnostic unit (14). The equalization diagnostic unit obtains an equalization control signal outputted from the equalization controlling unit, and an equalization detection signal detected at connection points (P1 to P3) of the equalization switches. Then, the equalization diagnostic unit compares the equalization control signal and the equalization detection signal, and diagnoses whether or not equalization processing in each of the battery blocks is executed in conformity based on a result of the comparison. For example, the equalization diagnostic unit determines that the equalization processing is conformity when the equalization control signal and the equalization detection signal coincide with each other, and that the equalization processing is nonconformity when both of the signals do not coincide with each other. |
