VIRTUAL FIREWALL-BASED THERMAL SPREAD SUPPRESSION STRATEGY FOR ELECTROCHEMICAL ENERGY STORAGE SYSTEM

Zhang Xiaolong; Sun Chengzhang; Wang Xu; Wang Linfei; Yang Guojing; Xu Ruijie

doi:10.19912/j.0254-0096.tynxb.2024-0832

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 41-51. DOI: 10.19912/j.0254-0096.tynxb.2024-0832

VIRTUAL FIREWALL-BASED THERMAL SPREAD SUPPRESSION STRATEGY FOR ELECTROCHEMICAL ENERGY STORAGE SYSTEM

Zhang Xiaolong¹, Sun Chengzhang², Wang Xu¹, Wang Linfei¹, Yang Guojing¹, Xu Ruijie²

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Abstract

To reduce the fire-fighting pressure of the traditional extinguishant and inhibit the occurrence and spread of thermal runaway in energy storage power stations, a fast discharge strategy based on the virtual firewall joint sampling point Kalman filtering algorithm and model predictive control algorithm is proposed for the energy storage compartment fire-fighting system that is commonly used nowadays. Firstly, the battery hierarchical warning strategy is utilized to illustrate the pre-warning and post-safety protection of the battery. Secondly, based on the battery thermoelectric coupling model, the temperature and SOC inside the battery are estimated using the extended Kalman filter algorithm and the sampling point Kalman filter algorithm. Finally, the model predictive optimal control joint sampling point Kalman filter algorithm is formulated based on the state space equations, and the explicit constraints are set on the battery current, voltage, temperature, and SOC to achieve the effect of fast discharge of lithium battery. The simulation results show that the proposed strategy can improve the estimation accuracy of the internal variable parameters of the system and reduce the risk of thermal runaway disasters.

Key words

energy storage power station / model predictive control / lithium-ion battery / battery charge spread / thermal spread / equivalent-circuit model

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Zhang Xiaolong, Sun Chengzhang, Wang Xu, Wang Linfei, Yang Guojing, Xu Ruijie. VIRTUAL FIREWALL-BASED THERMAL SPREAD SUPPRESSION STRATEGY FOR ELECTROCHEMICAL ENERGY STORAGE SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 41-51 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0832

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