Construction method of SOC (state of charge)-OCV (open-circuit voltage) model of lithium ion battery
A lithium-ion battery, state of charge technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of complex SOC-OCV model, low estimation accuracy, and difficult implementation, achieving small calculation and high overall accuracy , good adaptability effect
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[0027] The algorithm of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] like figure 1 As shown, a lithium-ion battery state-of-charge and open-circuit voltage model establishment method of the present invention is used to improve the ability to estimate the accuracy of the lithium-ion battery state-of-charge SOC. The method mainly includes the following processes and processing methods. Firstly, the SOC-OCV is processed in sections to reduce the fitting order and improve the fitting accuracy; The influence of health degree SOH and temperature T on the SOC-OCV model makes the SOC-OCV model more in line with the actual operation law. The SOC-OCV modeling method provided by the invention solves the problem of basic model mismatch in the SOC estimation process, and is beneficial to the follow-up management of the battery. This method can be used in various battery SOC estimation methods.
[0029] to combine figure 1...
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