| 摘要 |
If a protection voltage (or setting voltage value) is continuously exceeded for two times (three times) by all of the voltage values of a battery block that are read periodically at a period of 250 ms, it is determined that the voltage of the battery block exceeds the protection voltage value of 4.32 V (or setting voltage value of 4.30 V) so that a target value of charging current is reduced to 0.1 C (or reduced to a value smaller than the currently-set target value) at the first determination. Every when it is detected that the voltage value exceeds the setting voltage value, the target value is reduced at a predetermined reduction rate. As a result, charging current is exponentially reduced whereby keeping the charging operation. At the second determination where the voltage of the battery block exceeds the protection voltage, a circuit breaker cuts off the charging current. |
