Method and device for controlling fuel cell hydrothermal system of electric vehicle
By obtaining the operating parameters of electric vehicles and the state of the fuel cell stack, controlling the gas metering ratio to adjust the water temperature and dry and wet state, the problem of difficulty in rapid adjustment of traditional water temperature control is solved, and the stable operation of the fuel cell is achieved.
CN119725625APending Publication Date: 2025-03-28FTXT ENERGY TECH CO LTD
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Patent Information
- Application Number
- CN202311256910.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-26
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
When electric vehicles generate power changes, it is difficult to quickly adjust the water temperature of the fuel cell stack, resulting in the fuel cell being unable to operate stably.
Method used
By obtaining the operating power of the electric vehicle, the water temperature and impedance of the fuel cell stack, the standard water temperature and dry and wet state are determined, and the gas metering ratio of the fuel cell stack is controlled to adjust the water temperature and dry and wet state.
Benefits of technology
It realizes the rapid adjustment of the water temperature of the fuel cell stack when the power of the electric vehicle changes, ensuring the stable operation of the fuel cell in a suitable dry and wet environment.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a method and a device for controlling a fuel cell hydrothermal system of an electric vehicle. The method comprises the steps that the running power of the electric vehicle at the current moment, the water temperature of a fuel cell stack and the impedance of the fuel cell stack are obtained; determining a standard water temperature at which the fuel cell stack operates under the operating power; determining a dry-wet state of the fuel cell stack according to the impedance of the fuel cell stack; according to the standard water temperature, the water temperature of the fuel cell stack and the dry-wet state of the fuel cell stack, the gas stoichiometric ratio of the fuel cell stack is controlled, and the gas stoichiometric ratio is the ratio of the parameter of the gas flowing through the fuel cell stack to the parameter of the gas needed by the reaction of the fuel cell stack. According to the method and the device, the technical problem that the fuel cell cannot work stably due to the fact that only the water temperature of the fuel cell system is controlled and the water temperature cannot quickly reach the preset temperature corresponding to the changed power when the power of the electric vehicle is changed in the related technology is solved.
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