Optimal Control Strategy for Hybrid Electric System Based on
Lithium Battery Degradation Model
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Published
2021-09-20
Issue Date
2025-06-06
Abstract
A optimal control strategy for hybrid electric system which concurrently accounts for fuel consumption as
well as fuel cell and lithium battery degradation model is introduced. The model is based on the factors of transient
power load, start/stop cycle, idle and performance loss caused by high power. An analytical solution is provided for
the decay of electrochemical surface area (ECSA) of fuel cells. The degradation mechanism of fuel cells is quantified
by using simplified electrochemical model. A validated empirical model is used to correlate capacity attenuationand
discharge rate of lithium battery. The experimental results demonstrate that the power load curve of fuel cell stack
based on different weight parameter α changes significantly, which affects its life performance.The smaller the
value of α is, the steeper the load following curve of fuel cell stack is. The greater the value of α is, the smoother
the power load following curve is.
WANG Qiu-ting, QI Wei.
Optimal Control Strategy for Hybrid Electric System Based on
Lithium Battery Degradation Model[J]. Control Engineering of China, 2021, 28(9): 1725-1730