A Passive Balancing System Based on The SOC Sorting Technique

The novel battery cell monitoring and management scheme presented in this paper allows a significant reduction of the unbalance of battery pack based on the proposed passive SOC sorting balancing (PSSB) scheme. Further, due to economies of scale, it provides a cost effective approach. The proposed concept is verified with a SOC(state of charge) sorting with five series and two parallel connected battery, thus making the development of a battery SOC monitoring circuit for each battery cell type needless. The cost is reduced thanks to the SOC estimation for each battery cells integrating all the sensors of the monitoring electronics together with passive cell balancing and cell heating function. This paper describes the possibilities offered by the proposed concept and shows implementation examples of such a multiple connected battery system. This paper proposed a novel approach to the battery system, which is aimed to significantly reduce the component costs, the development time and the manufacturing costs of the battery system, while increasing its flexibility and reliability.