PASSIVE SOH BALANCING SCHEME FOR LITHIUM BATTERY BASED ON SWITCHING SHUNT RESISTANCE

Wu Qingfeng; Yang Kaiyi; Yang Yitao; Liu Liqun; Fan Yamin; Bo Liming

doi:10.19912/j.0254-0096.tynxb.2023-1310

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (12) : 520-527. DOI: 10.19912/j.0254-0096.tynxb.2023-1310

PASSIVE SOH BALANCING SCHEME FOR LITHIUM BATTERY BASED ON SWITCHING SHUNT RESISTANCE

Wu Qingfeng¹, Yang Kaiyi¹, Yang Yitao¹, Liu Liqun¹, Fan Yamin¹, Bo Liming²

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Abstract

The existing passive balancing schemes for the state of health （SOH） of lithium batteries focus on the state of charge （SOC） of lithium batteries, and mature SOH balancing technologies have not yet been formed. To address this issue,a passive SOH balancing scheme between lithium battery packs based on shunt resistance is proposed. The principle of SOH balancing is analyzed,and the calculation of shunt resistance value and the connection removal rule are studied. This achieves SOH balancing of the lithium batteries,enabling all lithium batteries to retire simultaneously and reducing maintenance costs. Finally,the effectiveness of the proposed scheme is validated through simulation and experimental verification using Matlab simulation software and an experimental platform.

Key words

battery pack / switching circuits / power control / passive balancing / state of health / depth of discharge

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Wu Qingfeng, Yang Kaiyi, Yang Yitao, Liu Liqun, Fan Yamin, Bo Liming. PASSIVE SOH BALANCING SCHEME FOR LITHIUM BATTERY BASED ON SWITCHING SHUNT RESISTANCE[J]. Acta Energiae Solaris Sinica. 2024, 45(12): 520-527 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1310

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