Study on Battery Management System and Lithium-ion Battery

This paper mainly discusses a distributed battery management system (BMS) that used for hybrid electrical vehicle (HEV) and the research on Lithium-ion battery based on the model of PNGV The BMS presented is composed with the distributed and integrated module, the distributed modules(DM) takes charge of measuring the parameters of voltage and temperature accurately and in time, communicate with the integrated module(IM) by CAN bus. The IM takes charge of estimating Lithium-ion batteries' state of charge (SOC) based on the data of DM and PNGV model. According to the complicated electromagnetism condition the anti-jamming methods are used between every part of the BMS to have the characters of robustness and reliability. According to the non-liner feature of Lithium-ion battery, PNGV model has the high accuracy to reflect the open circuit voltage (OCV) and SOC. Results show that the BMS has the characteristics of easy to expansion, high precision, working reliability and the PNGV model is suitable for Lithium-ion battery.