A method of estimating the state of charge of a traction battery of an electric vehicle
A power battery and state-of-charge technology, which is applied in the direction of measuring electricity, measuring electric variables, and measuring devices, can solve the problem of reducing the SOC estimation accuracy and stability of the power battery’s state of charge, filter estimation divergence, and low estimation accuracy And other issues
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[0146] Combine below Figure 1-5 The method for estimating the state of charge of the power battery of the electric vehicle in the present invention is described in detail.
[0147] Such as figure 1 As shown, the real-time data is collected from the battery management system (BMS) of the electric vehicle, and the system model of the power battery does not need to be established when using the ampere-hour integration method to estimate the SOC of the power battery It can be estimated directly, and the estimated value z of the state of charge SOC of the power battery can be obtained k,Ah ; When using the estimation method based on the system model of the power battery to estimate the state of charge SOC of the power battery, the state observer CDKF, AEKF and H infinity are used to cooperate with the system model of the power battery to estimate the SOC of the power battery. Estimated, the estimated values obtained are respectively z k,CDKF ,z k,AEKF and z k,Hinf , and fin...
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