Equalization circuit

The utility model discloses an equalization circuit, comprising a switch circuit controlled by a control unit and used for opening or closing a charging and discharging channel under the control of the control unit; the charging switching unit is controlled by the control unit and comprises equalization channels which are connected with the battery cell strings in the battery cell array in a one-to-one correspondence manner; the charging path switching circuit can be controlled to open one of the equalization channels; and the control unit controls the switching circuit to open the charging and discharging channels at the beginning of equalization, and opens the corresponding equalization channels based on the battery cell strings needing to be charged, so that the charging and discharging channels are communicated with the equalization channels, and the charging of the corresponding battery cell strings is realized. According to the utility model, active equalization can be realized while passive equalizatio