Hybrid power vehicle SOC preserved energy management method

Abstract

The invention discloses a hybrid power vehicle SOC preserved energy management method, and relates to a management method. The hybrid power vehicle SOC preserved energy management method comprises the steps of calculating demanded driving power; calculating demanded battery power; determining an engine working point; determining an electric generator working point; determining a motor working point. According to the hybrid power vehicle SOC preserved energy management method, starting by keeping the battery SOC at a higher level, energy managing and distributing are conducted to make a battery have higher power and energy margin, so that a motor can assist the engine at a larger power and longer time under the working conditions that large driving power is needed by fast acceleration and the like, and a higher dynamic performance index of a heavy vehicle is achieved; on the premise that basic requirements such as fuel economic efficiency and vehicle drive are met, the proposed control strategy realizes the function of series-parallel hybrid system energy management and expected battery SOC retentive goal.

Description

technical field [0001] The present invention relates to a management method, in particular to a hybrid vehicle SOC maintenance energy management method; Background technique [0002] Hybrid power includes various structural types such as series, parallel, and hybrid. Through control technology, the engine and the motor work together to work in the best efficiency state, thereby improving the problems of low efficiency and heavy pollution of pure internal combustion engine drive; the control strategy is The key to realizing the performance of the hybrid power system, its performance directly affects the important performances such as the power and fuel economy of the vehicle; the integrated controllers currently on the market are mainly aimed at light passenger vehicles, with fuel economy as the main goal. Mode switching and energy distribution control, the battery work mainly serves the fuel economy target, and the battery state of charge (SOC) may change greatly; heavy-duty...

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Problems solved by technology

[0002] Hybrid power includes various structural types such as series, parallel, and hybrid. Through control technology, the engine and the motor work together to work in the best efficiency state, thereby improving the problems of low efficiency and heavy pollution of pure internal combustion engine drive; the control strategy is The key to realizing the performance of the hybrid power system, its performance directly affects the important performances such as the power and fuel economy of the vehicle; the integrated controllers currently on the market are mainly aimed at light passenger vehicles, with fuel economy as the main goal. Mode switching and energy distribution control, the battery work mainly serves the fuel economy target, and the battery state of charge (SOC) may change greatly; heavy-duty vehicles with large drive power requirements have their special torque for acceleration and climbing Requirements, the battery needs to maintain a high SOC for the motor to assist, which is difficult for general integrated controllers to meet;

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