Fuel cell system starting control method and device

Abstract

The invention provides a fuel cell system starting control method and device, which are applied to the technical field of fuel cells. The method comprises the steps: responding to a starting instruction, adjusting air supply parameters, hydrogen supply parameters and cooling liquid supply parameters of a fuel cell stack, and under the condition that all the supply parameters reach a preset currentloading condition, enabling the controller to increase the output current of the fuel cell stack according to a preset current slope, maintaining the current state of the system after the output current of the fuel cell stack reaches a preset current threshold value and the rotating speed of the air compressor reaches a preset rotating speed threshold value of the air compressor, and accumulatingthe heating value based on the output current of the fuel cell stack; and finishing cold start until the heating value of the fuel cell stack reaches a preset heating value threshold. According to the control method, low-temperature cold start can be quickly completed on the premise of canceling a heating device, the optimization of vehicle user experience is facilitated, and the overall cost ofthe fuel cell system is reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell system starting control method and device. Background technique [0002] When the fuel cell system is in an extremely low temperature environment, such as -30°C, after sufficient cooling, the fuel cell stack and coolant will be below 0°C. If the fuel cell system is started at the preset current value in this case, due to the The battery stack and cooling liquid have large heat capacity and slow temperature rise, and a large amount of water generated during the reaction process will freeze at low temperature, which will block the reaction gas transmission channel, and eventually lead to the failure of the fuel cell system to start. [0003] In order to solve this problem, most of the existing fuel cell systems are additionally equipped with heating devices, such as PTC heaters. Start after a low temperature state to achieve the purpose of improving the ...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing technology, by adding an additional heating device to assist the fuel cell system to complete the cold start, it will inevitably increase the overall cost of the fuel cell system, which is not conducive to the cost control of the fuel cell system, and the heating power of the existing additional heating device Small, long duration, poor user experience

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