Integrated estimation method for health state of retired power lithium battery
A technology of health status and lithium battery, applied in the direction of genetic law, design optimization/simulation, genetic model, etc., to ensure the accuracy of estimation, simplify the quantity, and increase the diversity.
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[0071] Such as figure 1 As shown, the present invention provides an integrated estimation method for the state of health of a decommissioned power lithium battery, and its implementation method is as follows:
[0072] S1. Obtain the aging characteristics of the lithium battery, specifically: extract the aging characteristics of the battery from the voltage response curve of the current pulse test, and use it for estimating the state of health of the decommissioned power lithium battery. The extracted aging features include: the voltage values of the four inflection points of the voltage response curve and the voltage vector formed by the diagonal lines. A combined pulse is applied at a plurality of different states of charge SOC, the combined pulse comprising a series of current pulses of different magnitudes.
[0073] In this embodiment, in order to be conveniently applied in electric vehicles, the present invention obtains the aging characteristics of the power lithium ba...
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