High-voltage direct-current power distribution system for heavy-duty electric vehicle

Abstract

The invention provides a high-voltage direct-current power distribution system for a heavy-duty electric vehicle. The technical problem that existing high-voltage direct-current power distribution equipment is difficult to meet the use requirements of the system is solved. The system comprises a high-voltage direct-current power distribution unit used for forming a lower power supply interface tobe connected to a power battery pack, forming a lower load interface to be connected to a load device, and forming a forward interconnection interface and a backward interconnection interface to be connected with a direct-current bus respectively, and the direct-current bus which is used for accessing a high-voltage direct-current power supply and is connected with the forward interconnection interfaces and the backward interconnection interfaces of different high-voltage direct-current power distribution units. The power distribution requirement that the direct-current voltage grade is 500 VDC to 700 VDC is met. The system has the characteristics of distribution and modularization, is high in system redundancy and good in reliability, has a perfect protection function, and has fault diagnosis and fault isolation functions. The application of the system can improve the operation reliability of a heavy electric drive vehicle.

Description

technical field [0001] The invention relates to the technical field of power distribution, in particular to a high-voltage DC power distribution system for heavy-duty electric vehicles. Background technique [0002] In the prior art, a heavy-duty electric vehicle is usually jointly driven by a plurality of drive motors, and the equipment for providing electric energy on the vehicle generally includes a power battery pack and a generator set. Electrical equipment includes motor controllers, DCDC power supplies, inverters, etc. Due to the large variety and quantity of power supply equipment and power consumption equipment, the requirements for power distribution interfaces are relatively complex. A single high-voltage DC power distribution equipment is difficult to meet the needs of the system, and cannot guarantee the safety and stability of power supply. Contents of the invention [0003] In view of the above problems, an embodiment of the present invention provides a hig...

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Problems solved by technology

[0003] In view of the above problems, the embodiment of the present invention provides a high-voltage DC power distribution system for heavy-duty electric vehicles to solve the technical problem that the existing high-voltage DC power distribution equipment is difficult to meet the needs of the system.

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