Fuel cell braking energy recovery system of hydrogen energy automobile

Abstract

The invention provides a fuel cell braking energy recovery system of a hydrogen energy automobile. The system comprises a vehicle control unit (VCU), a motor control unit (MCU), a super capacitor+bidirectional DC component (SCMS) and a hydrogen fuel cell system (FCU); the SCMS is used for detecting the residual electric quantity (SOC, state of charge) of a super capacitor and the chargeable powerof the super capacitor; the FCU is used for controlling the output power of a fuel cell and controlling the fuel cell to charge power for the super capacitor; the MCU is used for obtaining the rotating speed of a motor and the maximum feedback torque of the motor and controlling the torque of the motor; and the VCU obtains an opening signal of an accelerator pedal as a trigger switch signal for energy recovery, obtains an opening signal of a brake pedal as a judgment basis for the energy recovery power, and obtains the SOC and rechargeable power of the SCMS, the motor rotating speed of the MCU, the maximum feedback torque of the motor and the working state of the fuel cell to recover the brake energy. The fuel cell braking energy recovery system has the beneficial effects that the energy utilization rate of the hydrogen energy fuel cell automobile is improved.

Description

Technical field [0001] The invention relates to the field of new energy vehicles, and in particular to a fuel cell braking energy recovery system for hydrogen energy vehicles. Background technique [0002] In order to cope with international environmental problems and energy crisis, new energy vehicles have been vigorously developed. Driving range is a major constraint on the development of new energy vehicles, so how to improve energy utilization is a very important issue. [0003] Under the current state of the art, there are many technical solutions for braking energy recovery; however, there are no relatively mature and suitable technical solutions for hydrogen fuel cells and other auxiliary energy sources (supercapacitors) for hydrogen fuel vehicles. Energy recovery Imperfect strategies will affect the life and performance of auxiliary energy, and have an impact on braking performance and driving experience. Contents of the invention [0004] In order to solve the a...

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Problems solved by technology

[0003] In the current state of the art, there are already many technical solutions for braking energy recovery; however, for hydrogen fuel vehicles with hydrogen fuel cells and other auxiliary energy sources (supercapacitors), there are still no relatively mature and suitable technical solutions. The imperfection of the strategy will affect the service life and performance of the auxiliary energy, and affect the braking performance and driving experience

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