Fuel cell power system for vehicle

Abstract

The invention provides a fuel cell power system for a vehicle. The fuel cell power system comprises a fuel cell stack, a hydrogen supply system, an air supply system, a DC / DC converter, a power cell pack and a main driving motor system. By combining the characteristics of an electric air compressor, a driving motor and the vehicle travelling working condition, a motor of the electric air compressor and a main driving motor are combined in use, so that the motor of the air compressor and a motor controller are omitted; and energy is supplied to the air compressor through the main driving motorsystem when the fuel cell pack operates, so that the air compressor supplies air meeting the requirement of the working condition to the fuel cell stack. Through assisting of the power cell pack, preheating preparation of the fuel cell stack is carried out at the time of starting of the vehicle. Thus, structural simplification and control simplification of the fuel cell power system are achieved,the occupied space and weight of the system are reduced, waiting is not needed at the time of starting of the vehicle, and accordingly energy consumption of the system is further reduced.

Description

Technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a vehicle fuel cell power system and a new energy electric vehicle applied thereto. Background technique [0002] The fuel cell stack uses the electrochemical reaction between the hydrogen stored in the gas cylinder and the oxygen from the air to generate electricity, which provides a source of power for electrical equipment. [0003] Generally, the fuel cell power system needs to match the electric air compressor according to the power size. The electric air compressor includes compressor components, a motor, and a motor controller. When the electric air compressor is started, an external vehicle low-voltage 12 / 24V power supply is required to provide starting energy, and the low-voltage power supply needs to be converted to the high-voltage DC-DC converter required by the electric air compressor motor controller. After waiting for a period of time, the fuel cell stack can reach t...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a fuel cell power system for vehicles, which can avoid the excessive number of electric air compressor components in the fuel cell power system in the prior art; secondly, when it is applied to the whole vehicle, it can effectively solve the problem of complex structure and start-up waiting time. too long problem

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