Control method based on fuel cell vehicle energy distribution

Abstract

The invention discloses a control method based on fuel cell vehicle energy distribution. The method comprises the steps that S1, a vehicle control unit VCU obtains the current state of a fuel cell controller FCU, the battery remaining capacity SOC and the current vehicle speed through a bus, and judges whether the complete vehicle is in a high-voltage state or not according to data of a battery and a motor; and S2, after the obtained current state of the fuel cell controller FCU, the obtained current vehicle speed and the obtained high-voltage state of the complete vehicle are processed through a logic gate, the operation mode of the complete vehicle is divided into a parking charging mode, a pure electric mode, a hybrid power mode and a fuel cell system shutdown mode. According to the method, the required power is distributed according to the battery remaining capacity and the operation mode of the complete vehicle, the dynamic property and safety of the vehicle can be guaranteed, thedischarge power of the battery can be effectively reduced, and the battery utilization efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of automotive electronics applications, and in particular relates to a control method based on fuel cell vehicle energy distribution. Background technique [0002] In today's increasingly severe situation of energy and environmental protection, the development of new energy vehicles has received more and more attention, and fuel cell vehicles have been extensively studied by developers with their unique advantages in energy conservation and environmental protection. Fuel cell vehicles usually use fuel cells and lithium-ion power battery packs as vehicle power sources. Therefore, research on complete energy management control strategies to achieve energy distribution and flow of multi-power source systems to improve vehicle performance has become the key to the development of fuel cell vehicles And hot issues. [0003] In the current international situation, the application example of the structure of "fuel cell + ...

AI Technical Summary

Problems solved by technology

[0003] In the current world, the application example of the "fuel cell + power battery + super capacitor" structure is Honda's FCHV-4, etc., which adds a super capacitor on the basis of the "fuel cell + power battery" structure and improves the recycling system. The effect of kinetic energy, however, this structure is relatively complex, and the difficulty of control increases accordingly

[0004] Most of the existing patents on fuel cell vehicle energy management use SOC as the basis for judging the working mode of fuel cell vehicles. Although this can improve battery life and avoid battery overcharging, it will be obvious that SOC is used as a basis for judging the working mode of fuel cell vehicles. Reduce fuel cell energy utilization efficiency and reduce vehicle dynamics

[0005] As far as the applicant knows, the Chinese patent CN201710526477.7 "Energy Control Method and Device for Fuel Cell Vehicle and Fuel Cell Vehicle" uses the battery SOC as a single input as the basis for judging the working mode of the fuel cell vehicle. Although this can improve the service life of the battery and avoid The battery is overcharged, but using the battery SOC as the judgment of the working mode of the fuel cell vehicle will reduce the energy utilization efficiency of the fuel cell to a certain extent, and at the same time reduce the power performance of the vehicle

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