The invention discloses a battery pack fault battery online replacement circuit and a battery pack fault battery online replacement method, and relates to battery energy storage. The battery pack fault battery online replacement circuit comprises a plurality of battery pack circuit modules; the plurality of battery pack circuit modules are sequentially connected in series; and each of the batterypack circuit modules comprises a first diode D1, a second diode D2, a third diode D3, a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a battery pack P, a first potentiometer R1 and a second potentiometer R2. According to the circuit of the invention, under the condition that the voltage of the battery pack is not suddenly changed, the online replacement function of afaulty battery (or battery module) is realized, the stability of the online operation voltage of the battery pack can be effectively guaranteed, the cost is saved, the complexity of the device is simplified, and the situation that the voltage or the current is interrupted is avoided while the purpose of online replacement of the faulty battery (or battery module) is achieved.

Battery pack fault battery online replacement circuit and method

The invention discloses a battery pack online equalization circuit for removing a fault battery and relates to an energy storage battery technology. The battery pack online equalization circuit comprises a plurality of equalization circuit modules, wherein a plurality of equalization circuit modules are sequentially connected in series, the equalization circuit module comprises a first diode D11,a second diode D12, a third diode D13, a first switch S11, a second switch S12, a third switch S13, a fourth switch S14 and a battery pack P. The battery pack online equalization circuit is advantagedin that for an online equalization/fault battery removal circuit of a battery pack, double functions of online equalization and fault battery removal are realized, circuit operation is simple, the method is easy to implement and can effectively guarantee consistency and safety of online operation of the battery pack, compared with a conventional equalization circuit which needs to be additionallyprovided with a fault battery for removal, the equalization circuit saves the cost, simplifies the complexity of the device, does not damage a health state of the battery to be equalized while achieving the equalization purpose, and facilitates safe and economic operation of the energy storage battery.

Battery pack online equalization circuit for removing fault battery

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Battery pack online equalization circuit for removing fault battery

Battery pack fault battery online replacement circuit and method