DC contactor and vehicle

Abstract

The embodiment of the invention provides a direct-current (DC) contactor and a vehicle. The direct-current contactor comprises a shell and two groups of contact assemblies arranged in the shell, eachcontact assembly comprises two moving contacts and two static contacts, wherein the two moving contacts are connected. The DC contactor also comprises a driving system used for driving the moving contacts to move towards or away from the static contacts so as to realize on-off of the moving contacts and the static contacts, wherein the shell is internally provided with an arc extinguishing cavity;the arc extinguishing cavity is divided into a first arc extinguishing chamber and a second arc extinguishing chamber by a first blocking piece in the arc extinguishing cavity; the contact assembliesare respectively positioned in the first arc extinguishing chamber and the second arc extinguishing chamber; two groups of contact assemblies are integrated into two arc extinguishing chambers of onearc extinguishing cavity, the on-off driving is carried out in a single driving system mode, the structure of the direct-current contactor is simplified, the on-off requirements of positive and negative pole circuits can be met by using one direct current contactor, a contactor does not need to be installed on each of the positive and negative poles, the size of a charging device is reduced, andthe manufacturing cost is reduced.

Description

technical field [0001] The embodiments of the present application relate to the field of electric power technology, and in particular to a DC contactor and a vehicle. Background technique [0002] The contactor is an "automatic switch" that uses a small current to control a large current. It plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. As a type of contactor, the DC contactor is mainly used in the DC circuit. With the continuous development of power technology, DC power supply systems with DC contactors are widely used in electric vehicles, construction machinery, solar energy, and wind energy equipment. For example, in the DC charging circuit of new energy vehicles, high-voltage DC The contactor becomes an important power distribution control device in this circuit. [0003] In the current DC fast charging circuit, whether it is on the power side of the DC fast charging device or in the power distribution box (PDU) on th...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a DC contactor and a vehicle, which solves the problem that a DC contactor is installed on each of the positive and negative pole lines in the existing DC fast charging circuit, resulting in a larger volume of the charging device and higher manufacturing costs.

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