High voltage distribution box control circuit of hydrogen fuel cell system

Abstract

The invention discloses a high voltage distribution box control circuit of a hydrogen fuel cell system. The high voltage distribution box control circuit comprises a fuel cell control module, an insulation detecting module, a high voltage branch module, a power cell interface circuit, an FCS-DCH output interface circuit, an FCS-DCH input interface circuit, an FC output interface circuit, a pre-charge circuit 1, a pre-charge circuit 2, a power diode 1 and a power diode 2, the power cell interface circuit is connected with a whole vehicle in an abutting mode, the FCS-DCH output interface circuitis a fuel cell system voltage increasing DCDC high voltage output interface, the circuit is connected with the power cell interface circuit in parallel, and the FC output interface circuit is an electricity energy output interface generated after chemical reaction of the fuel cell. According to the high voltage distribution box control circuit of the hydrogen fuel cell system, a fuse protector, acontactor, the insulation detecting module and the like are integrated in the high voltage distribution box, and thus high voltage safety of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cell vehicles, in particular to a control circuit for a hydrogen fuel cell system high voltage distribution box. Background technique [0002] New energy vehicles refer to all other energy vehicles except gasoline and diesel engines. Including pure electric vehicles, fuel cell vehicles, hybrid vehicles, hydrogen energy vehicles and solar vehicles, etc., the main function of the radiator in the cooling system of new energy vehicles is to dissipate part of the heat absorbed by the heated parts in time to ensure that the generator Work in the most suitable temperature state. At present, there are many radiators suitable for pure electric vehicles and hybrid vehicles, and the technology is relatively mature. [0003] There are two types of hydrogen energy vehicles. One is a hydrogen internal combustion engine vehicle (HICEV), which uses an internal combustion engine to burn hydrogen (usually o...

AI Technical Summary

Problems solved by technology

[0004] The current automotive fuel cell system circuit is relatively complex, the circuit integration is not high, and there are many matching interfaces with the vehicle, which is not conducive to resource integration. Secondly, when the most serious fault occurs in the vehicle electrical system, the vehicle controller will control the vehicle to shut down Turn on the high-voltage circuit. At this time, because the chemical reaction of the fuel cell is still going on, disconnecting the high-voltage circuit will easily damage the related components of the fuel cell.

Images