Innovative Incremental Capacity Analysis Implementation for C/LiFePO4 Cell State-of-Health Estimation in Electrical Vehicles

Batteries

卷:5

Frédéric Meniere¹  Elie Riviere¹  Yann Bultel²  Pascal Venet³  Ali Sari³ 

[1] Battery Management System Department, EVE System (Electric Vehicles Engineering), 69440 Taluyers, France;

[2] Univ Grenoble Alpes, Univ Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000 Grenoble, France;

[3] Univ Lyon, Université Claude Bernard Lyon 1, Ecole Centrale de Lyon, INSA Lyon, CNRS, Ampère, F-69000 Lyon, France;

关键词: accelerated ageing;    battery management system;    battery management system (BMS);    calendar ageing;    cycling ageing;    electric vehicle;    embedded algorithm;    incremental capacity analysis;    incremental capacity analysis (ICA);    lithium-ion battery;    lithium iron phosphate;    LFP;    LiFePO₄;    remaining capacity;    state of health (SoH);   

DOI  :  10.3390/batteries5020037

来源: DOAJ

【 摘 要 】

This paper presents a fully embedded state of health (SoH) estimator for widely used C/LiFePO₄ batteries. The SoH estimation study was intended for applications in electric vehicles (EV). C/LiFePO₄ cells were aged using pure electric vehicle cycles and were monitored with an automotive battery management system (BMS). An online capacity estimator based on incremental capacity analysis (ICA) is developed. The proposed estimator is robust to depth of discharge (DoD), charging current and temperature variations to satisfy real vehicle requirements. Finally, the SoH estimator tuned on C/LiFePO₄ cells from one manufacturer was tested on C/LiFePO₄ cells from another LFP (lithium iron phosphate) manufacturer.

【 授权许可】

Unknown