Design and research of lithium battery parameters identification model

Dianzi Jishu Yingyong

Chen Yong¹  Sun Tao²  Gong Guoqing² 

[1] Beijing Laboratory for New Energy Vehicle，Beijing 100192，China;School of Mechanical and Electrical Engineering，Beijing Information Science and Technology University，Beijing 100192，China;

关键词: power battery;    temperature and state of charge;    model parameters identification;   

DOI  :  10.16157/j.issn.0258-7998.181783

来源: DOAJ

【 摘 要 】

Electric vehicle battery internal parameters vary with load and working conditions, so it is necessary to establish an accurate power battery model. Based on the equivalent circuit model of lithium battery and considering the influence of operating temperature and state of charge(SOC) on component parameters, this paper relied on charge and discharge method, combined hybrid pulse power characteristic(HPPC) tests and least squares method to realize each component parameter identification. The power battery model and the charge and discharge model were constructed by Simulink platform. The above models realized the accurate estimation of SOC by the ampere-hours measurement method and considering temperature influence. The results show that the lithium battery parameters identification model can accurately simulate operating characteristics of the power battery under various load conditions. The design can be applied to testing and developing power batteries.

【 授权许可】

Unknown