An algorithm for predicting state of charge of lithium iron phosphate batteries

After some common algorithms for predicting SOC(state of charge) were analyzed for their limit of practicability or accuracy,a new algorithm was put forward which combined the relationship of VOC(voltage of charge) to SOC with the battery equivalent circuit model.Based on lithium iron phosphate batteries,the experiments of charging and discharging batteries were done.Then,the parameters of battery equivalent circuit model and the relationship of VOC to SOC were identified by it.Finally,the two results from the experiment were compared which were estimated by experiments and simulating.The results show that the new algorithm meets both the requirement of practicability and accuracy.