Balancing Strategy and Implementation for Battery Operation and Maintenance System Based on Mean Difference Capacity
The operation and maintenance system can achieve balanced management of battery energy storage power stations. To solve the SOC estimation problem caused by battery uncertainty,a hardware circuit of the operation and main-tenance system with CAN bus and battery pack recognition module is designed,and a SOC estimation method based on feature data extraction is proposed;On this basis,a balancing control module was developed using the battery pack as the energy source,and an active balancing strategy based on average difference capacity was studied to obtain balancing duration and current,thereby solving the problem of balancing failure easily caused by the average voltage method. The experimental results show that the battery operation and maintenance system can achieve data collection of multiple battery packs in energy storage power stations,and can continuously supplement power under conditions such as SOC differences of 5％,10％,and 15％. The maximum current reaches 1.5 A,effectively improving the consistency level of the internal batteries in the battery pack.
operation and maintenance systemvoltage-SOC relationshipmean difference capacity balancing strategyCAN bus
万方数据
维普
