Voltage equalizing device for storage battery pack

The invention discloses a voltage equalizing device for a storage battery pack. The voltage equalizing device for a storage battery pack is connected to the positive and negative ends of a single battery in the storage battery pack; the voltage equalizing device for a storage battery pack comprises a sampling comparison loop, a current amplification loop and an indication circuit. The first end and the second end of the sampling comparison loop are respectively connected to the positive and negative ends of the single battery. The sampling comparison loop is used for collecting positive and negative voltages of the single battery and controlling the working state of the current amplification loop. The current amplification loop comprises a first end, a second end, a control end and an indication signal output end. The first end and the second end of the current amplification loop are connected to the positive end and the negative end of the single battery respectively, the control endis connected with the con