A vehicle and fuel cell power control method and system

Abstract

The invention provides a vehicle and fuel cell power control method and system, belonging to the technical field of fuel cell vehicles. The fuel cell power control method includes the following steps: obtaining the vehicle speed of the vehicle ahead; determining the first power according to the vehicle mass of the current vehicle and the vehicle speed of the vehicle ahead; Use the first power as the second power, otherwise, use the power battery limited charging power of the first setting multiple as the second power; then compare the second power with the fuel cell maximum power of the second setting multiple, when the second When the power is less than the maximum fuel cell power of the second set multiple, the second power is used as the target power of the fuel cell to control the fuel cell; otherwise, the fuel cell maximum power of the second set multiple is used as the target power control of the fuel cell The fuel cell. The target power of the fuel cell estimated by this method is more in line with the power demand of the vehicle.

Description

technical field [0001] The invention relates to a vehicle and a fuel cell power control method and system, belonging to the technical field of fuel cell vehicles. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. Since the fuel cell needs a certain chemical reaction time to respond to the target power of the vehicle, it is not easy to follow the throttle opening to output the power required by the driver during the use of the fuel cell vehicle. Instead, it usually needs to be supplemented by the power battery. The power supply is used to make up for the defect that the fuel cell does not respond to power in time. [0003] At present, the control of fuel cell power is mostly determined according to the SOC (State Of Charge) value of the power battery. For example, the invention patent application document with the application publication number CN107264324A discloses an energy control met...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fuel cell power control method to solve the problem that currently only the SOC value of the power battery is used to determine the target power of the fuel cell, resulting in a large difference between the determined target power of the fuel cell and the power demand of the whole vehicle Problem; the present invention also provides a fuel cell power control system to solve the problem that currently only the SOC value of the power battery is used to determine the target power of the fuel cell, resulting in a large difference between the determined target power of the fuel cell and the power demand of the whole vehicle Problem; the present invention also provides a vehicle to solve the problem that currently only the SOC value of the power battery is used to determine the target power of the fuel cell, resulting in a large difference between the determined target power of the fuel cell and the power demand of the whole vehicle, resulting in vehicle driving experience bad question

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