Electric energy transmission device and electric vehicle charging system

Abstract

The invention provides an electric energy transmission device, and the device comprises a pipeline and a cooling unit; the pipeline comprises a pipeline, a first conductive terminal and a second conductive terminal; the first conductive terminal and the second conductive terminal are tightly assembled at the two ends of the pipeline; the cooling unit is communicated with the pipeline, the pipeline of the cooling unit and the pipeline of the pipeline form a closed annular pipeline, and conductive liquid is arranged in an inner cavity of the annular pipeline. The electric energy is transmitted in the pipeline through the conductive liquid, and the conductive liquid circularly flows in the pipeline and flows through the cooling unit to realize heat exchange, so the conductive liquid can cool the first conductive terminal and the second conductive terminal while transmitting the electric energy, the cooling efficiency is improved, and a larger current can be safely borne; and the problem of complex manufacturing process of the existing power wire harness is also improved. The invention further relates to an electric automobile charging system adopting the electric energy transmission device, high-power charging of an electric automobile is safely achieved, meanwhile, the flexibility of a charging gun cable is improved, and easy charging operation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of high-power charging of electric vehicles, and in particular relates to an electric energy transmission device and an electric vehicle charging system using the electric energy transmission device. Background technique [0002] With the development of new energy vehicle technology, users have higher and higher requirements for the charging efficiency of electric vehicles, especially the network layout of charging piles on national highways, and the demand for high-power charging technology is becoming increasingly urgent. At present, the cross-section of the power transmission device (such as the power harness) of the DC charging gun has reached 70 square millimeters, which can only withstand a continuous charging current of 250A, which cannot meet the transmission needs of larger currents. In order to increase the current-carrying capacity of the charging equipment, the method of increasing the wire diame...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides an electric energy transmission device, which realizes high-power electric energy transmission through the conductive liquid in the pipeline, and at the same time, the conductive liquid circulating in the pipeline is cooled by the cooling unit and can cool the conductive terminals, effectively improving current There are problems such as complex manufacturing process of power wiring harness, low cooling efficiency and easy overheating

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