Vehicle and fuel cell power control method and system

Abstract

The invention provides a vehicle and a fuel cell power control method and system, and belongs to the technical field of fuel cell vehicles. The fuel cell power control method comprises the following steps: acquiring the speed of a front vehicle; determining first power according to the whole vehicle mass of the current vehicle and the vehicle speed of the front vehicle, and taking the first poweras second power when the first power is smaller than the limited charging power of the power battery of a first set multiple, otherwise, taking the limited charging power of the power battery of the first set multiple as the second power; comparing the second power with the maximum power of the fuel cell of a second set multiple; and when the second power is smaller than the maximum power of the fuel cell of the second set multiple, taking the second power as the target power of the fuel cell to control the fuel cell, otherwise, taking the maximum power of the fuel cell of the second set multiple as the target power of the fuel cell to control the fuel cell. The target power of the fuel cell pre-estimated by the method better meets the power requirement of the whole 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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