Novel fuel cell vehicle control system and control method

Abstract

The invention provides a novel fuel cell vehicle control system and control method. A fuel cell controller is additionally arranged on the basis of an existing fuel cell vehicle control system, the starting and stopping state of a fuel cell engine is controlled by a whole vehicle controller through the fuel cell controller, and when the fuel cell engine is started, a target power is selected frompreset minimum power of a high-efficiency area, the maximum power of the high-efficiency area and available maximum power through residual electric quantity of a power cell and vehicle speed; and thepower output of the fuel cell engine is controlled by limiting the target power according to the working conditions of the whole vehicle. Based on the novel fuel cell vehicle control system, preferentially satisfaction is realized when the whole vehicle has a high power demand, and thus the dynamic property of the whole vehicle is ensured; and the target power is further limited to reduce the occurrence of overcharging of the power cell by the fuel cell engine and prolong the service life of the power cell.

Description

technical field [0001] The invention relates to the technical field of automobiles, and more specifically relates to a novel fuel cell automobile control system and control method. Background technique [0002] The emergence of extended-range electric vehicles, especially fuel cell vehicles, has alleviated people's anxiety about the range of electric vehicles. [0003] figure 1 Shows the existing fuel cell vehicle control system, the control system includes a battery manager 10, a motor controller 20 and a vehicle controller 30, wherein the battery manager is used to manage the power battery 40, the motor controller 20 is used to manage the motor 50, The fuel cell engine 60 often adopts a thermostat control strategy, that is, after the fuel cell engine 60 is turned on, it always charges the power battery 40 at the optimum power point ( figure 1 The dotted line part is the high voltage connection, and the solid line part is the low voltage connection). [0004] When the ve...

AI Technical Summary

Problems solved by technology

[0004] When the vehicle is matched, the rated power of the power battery engine is low, so the power at the best power point is bound to be lower, but the power battery needs to meet most working conditions. The power is relatively high

Therefore, charging at the best power point of the fuel cell engine will cause the power battery to be in a low state of charge for a long time, which will affect the life of the power battery and limit the power of the vehicle.

Images