| 摘要 |
An MCU (4) classifies the levels of the voltages across both ends of respective unit cells (C1 to C5) into levels “long discharge”, “normal discharge”, “short discharge” and “no discharge”, and on/off controls switches so that the unit cell (C4) having the level “no discharge” closest to a reference voltage is not discharged and so that, among from the unit cells (C1 to C3 and C5) having the other levels, the unit cell having a level farther from the reference voltage is discharged longer. |
| 主权项 |
1. An equalization device for equalizing voltages across both ends of a plurality of unit cells mutually connected in series, the equalization device comprising:
a voltage detection section that detects the voltages across both ends of the respective unit cells; a plurality of discharge resistors that discharge the unit cells, each of the unit cells being provided for each of the unit cells; a plurality of switches configured to connect the unit cells to the discharge resistors; and an equalization section that equalizes the unit cells by controlling the switches, wherein the equalization section defines the lowest voltage of the voltages across both ends detected by the voltage detection section as a reference voltage, and comprises:
a classification section that classifies the voltages across both ends of the respective unit cells into 3 levels or more in accordance with the differences between the reference voltage and the voltages across both ends of the respective unit cells detected by the voltage detection sections; anda switch control section that on/off controls the switches so that the unit cell having the level closest to the reference voltage is not discharged and so that, among from the unit cells having the other levels, the unit cell having a level farther from the reference voltage is discharged longer. |
