Method for operating a motor vehicle designed as a fuel cell vehicle and controller

By detecting the electrical operating status of the high-voltage energy storage device and adjusting the electrical operating power of the fuel cell system, the power distribution of fuel cell vehicles is optimized, the risk of damage to the fuel cell system and the high-voltage energy storage device is resolved, and a stable supply of electrical power is achieved.

CN122143674APending Publication Date: 2026-06-05CHAFA FRIEDRICH SCHAFFEN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHAFA FRIEDRICH SCHAFFEN CO LTD
Filing Date
2025-11-27
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies struggle to optimize power distribution between fuel cell systems and high-voltage energy storage devices while meeting the electric power requirements of motor vehicles, thus avoiding the risk of damage to both.

Method used

By detecting the time period during which the electrical operating power of the high-voltage energy storage device exceeds the continuous power but is less than the maximum allowable peak power, the peak power is reduced to the continuous power using a predetermined time gradient, and the electrical operating power in the fuel cell system is adjusted to optimize power distribution, ensuring that the electrical power requirements are met in traction and coasting modes.

Benefits of technology

It achieves optimized power distribution between the fuel cell system and the high-voltage energy storage device, reduces the risk of damage, and ensures a stable supply of electric power to meet the needs of motor vehicles.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method and a controller for operating a motor vehicle designed as a fuel cell vehicle. The motor vehicle has a high-voltage system, an electric machine, a high-voltage energy store and a fuel cell system, the method having the following steps: When the high-voltage energy store is operated with an operating power which is greater in absolute terms than a continuous power and smaller in absolute terms than a maximum permissible peak power, a period of time is detected in which the high-voltage energy store is operated with the electrical power. When the detected period of time reaches a maximum permissible period of time, the maximum permissible peak power of the high-voltage energy store is reduced by a time gradient in absolute terms to the continuous power. When the difference between the maximum permissible peak power and the operating power reaches a threshold value, the electrical operating power of the fuel cell system is increased in a traction mode and reduced in a coasting mode, wherein the electrical operating power of the high-voltage energy store is reduced in absolute terms to less than the continuous power in order to provide the electrical power requirement of the motor vehicle in total.
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