Hybrid electric vehicle hybrid power supply cooperative control considering battery state of charge
The coordinated control of compound power supply is an indispensable step in the normal driving process of hybrid electric vehicles.However,the cooperative control process is easily affected by problems such as battery performance,current effect,and vehicle speed,resulting in unstable current distribution of the composite power supply.Therefore,a hybrid electric vehicle hybrid power cooperative control method considering the state of charge of the battery is proposed.The method first obtains the estimated value of the battery state of charge by constructing a second-order RC equivalent circuit model,then calculates the efficiency characteristics of the hybrid power supply based on the estimated value,and finally uses the adaptive filter power allocation control algorithm to realize the power sharing between the supercapacitor and the battery by constructing the objective function and constraint conditions,thus completing the cooperative control of the hybrid power supply of the hybrid electric vehicle.The simulation results show that the current distribution of the proposed method is good,the energy consumption of the controlled vehicle is low,and the energy consumption is always controlled within the range of 0.6～2.7 k W/h.
second-order RC equivalent circuit modeldischarge efficiencyparameter optimizationcurrent compensationpower distribution control
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