Hydrogen system control method suitable for new energy hydrogen fuel cell vehicle

Abstract

The invention relates to a hydrogen system control method suitable for a new energy hydrogen fuel cell vehicle. A hydrogen system comprises a hydrogen fuel cell, a fuel cell controller, a hydrogen storage system, a hydrogen storage controller and a boosting DC-DC converter. A whole vehicle CAN communication network topology is formulated, and communication protocols and electrical interfaces of a fuel cell controller, a hydrogen storage controller, a boost DCDC converter and a whole vehicle controller are respectively compiled; and a control strategy is made for the vehicle control unit, and the vehicle control unit directly controls the fuel cell controller, the hydrogen storage controller and the boost DC-DC converter according to the control strategy. The vehicle control unit directly controls the fuel cell controller, the hydrogen storage controller and the boost DC-DC converter, so that the control flexibility of the vehicle to each system is improved, and the control dynamic response time is prolonged; the hydrogen fuel cell is independently controlled by the fuel cell controller, so that complex functions caused by the fact that the vehicle controller is compatible with the functions of the fuel cell controller are avoided.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a hydrogen system control method suitable for new energy hydrogen fuel cell vehicles. Background technique [0002] New energy hydrogen fuel cell vehicles are an important development direction of new energy vehicles. The hydrogen system of a new energy hydrogen fuel cell vehicle mainly includes a hydrogen fuel cell and a fuel cell controller (Fuel-Cell Engine Control Unit, FCU), a hydrogen storage system and a hydrogen storage controller (Hydrogen control unit, HCU), a booster DC- Systems and components such as DC converters. According to the different control objects, the existing new energy hydrogen fuel cell vehicles have various hydrogen system control methods. At present, the main control methods are as follows: [0003] (1) Control scheme 1: The hydrogen storage system, HCU, and boost DC-DC converter are integrated by the hydrogen fuel cell system supplier, a...

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Problems solved by technology

[0007] Based on the above content, it can be seen that the main problem of control scheme 1 and control scheme 2 is that because the OEM lacks HCU and boost DC-DC converter control technology, the hydrogen storage system, HCU, and boost DC-DC converter are powered by hydrogen fuel. Integration of battery system suppliers, the OEM cannot independently select the hydrogen storage system, HCU, and boost DC-DC converter, and at the same time, the VCU cannot directly control the HCU and boost DC-DC converter, which affects the HCU and boost DC-DC Dynamic Response Time of Converter Control

The problem with the third control scheme is that it is very difficult to control the internal systems of the hydrogen fuel cell, and it is necessary to have a professional R&D team and equipment. At the same time, the VCU integrates the FCU function, which increases the software and hardware configuration of the VCU, resulting in complex software and hardware of the VCU and difficult control. Big

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