Auxiliary energy system of hydrogen fuel cell vehicle

Abstract

The invention discloses an auxiliary energy system of a hydrogen fuel cell vehicle, and relates to the technical field of auxiliary energy systems of hydrogen fuel cell vehicles. The auxiliary energysystem specifically comprises a main energy system, an auxiliary energy system body, a power distribution unit (PDU) and vehicle electric equipment (VEE); the main energy system comprises a fuel cellengine system (FCES) and a boost DCDC; and the auxiliary energy system body comprises a super-capacitor system (SCS), a bidirectional DCDC and a nickel hydride battery system (NiMH BS). According to the auxiliary energy system of the hydrogen fuel cell vehicle, an auxiliary energy framework is optimized, the system structure is a multi-structure, the super-capacitor energy system and the nickel hydride battery energy system are included and make good for deficiency, and thus the whole auxiliary energy system can meet normal work of the vehicle under any operating condition.

Description

technical field [0001] The invention relates to the technical field of auxiliary energy systems for hydrogen fuel cell vehicles, in particular to an auxiliary energy system for hydrogen fuel cell vehicles. Background technique [0002] With the increasing awareness of environmental protection, the development of hydrogen fuel vehicles is urgently accelerated. How to improve the safety and reliability of the whole vehicle while reducing the cost is one of the problems faced by hydrogen fuel vehicles. Optimizing the power system architecture is the main solution for current applications. One of the options. [0003] Whether it is a hydrogen fuel cell commercial vehicle or a hydrogen fuel cell passenger vehicle, the main power source includes the main power source (hydrogen fuel cell system and boost DCDC) and auxiliary energy. At this stage, the dynamic response of the hydrogen fuel cell engine is slow. , in the face of the fact that it is impossible to follow the opening rat...

AI Technical Summary

Problems solved by technology

[0003] Whether it is a hydrogen fuel cell commercial vehicle or a hydrogen fuel cell passenger vehicle, the main power source includes the main power source (hydrogen fuel cell system and boost DCDC) and auxiliary energy. At this stage, the dynamic response of the hydrogen fuel cell engine is slow. , in the face of the fact that it is impossible to follow the opening rate of the accelerator pedal, there are still the following problems: slow start-up, the intervention of auxiliary energy is required before the battery stack is turned on, and it is for the whole vehicle to run; the power of the fuel cell engine cannot be quickly increased; the fuel cell cannot be quickly reduced Battery engine power; shutdown is slow, when the vehicle has no demand for power, an auxiliary energy system is required to absorb the power from the fuel cell engine

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