Method for evaluating health state and residual life of power battery of electric vehicle
An electric vehicle and state-of-health technology, which is used in electric vehicles, battery/fuel cell control devices, and measurement of electricity. and other issues, to achieve the effect of improving accuracy, clear meaning, and detailed theoretical basis
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[0028] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.
[0029] like figure 1As shown, the method for evaluating the health status and remaining life of the power battery of an electric vehicle in this embodiment forms a series of charging segment data by reasonably splitting and constructing the vehicle operation data, and combining the discrete capacity increments based on these segment data The analysis method is used to construct the capacity increment curve of the power battery in the current state, and the ratio of the capacity increment corresponding to the overlapped part of the abscissa voltage of the two discrete capacity increment curves before and after is calculated in turn, so as to evaluate the change of SOH. A SOH change curve is obtained, which describes the change of battery SOH from the initial moment or mileage to the current moment or mileage stage. After obtaining the SOH change curve...
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