DC contactor and automobile

Abstract

The invention provides a DC contactor and an automobile. The DC contactor comprises a shell, a first static contact and a second static contact fixed to the shell, and a first moving contact and a second moving contact located in the shell. A driving mechanism comprises an insulating rod connected with the first moving contact and the second moving contact, a driving assembly for driving the insulating rod to drive the first moving contact and the second moving contact to synchronously move towards the first static contact and the second static contact, and a pressing assembly used for pushingthe moving contact to be pressed on the static contact. Through the description, only two pairs of contacts are adopted to achieve on-off of a two-pole circuit, the total contact resistance is reduced by half compared with the prior art, and the problem that in the prior art, the through-current loss is large is solved. Meanwhile, half of coil driving power consumption is reduced; and only a single driving mechanism is needed to drive the two contacts, so that the difficulty of realizing the on-off synchronism of the two-pole contacts is greatly reduced.

Description

technical field [0001] This application relates to the field of electric power technology, in particular to a DC contactor and an automobile. Background technique [0002] The high-voltage DC contactor is an important power distribution control device for the DC charging circuit of new energy vehicles. With the increase in the demand for battery life of new energy vehicles, the capacity of on-board batteries is also increasing, so the market's requirements for the voltage and current level of on-board DC contactors are also getting higher and higher (currently, the rated voltage of on-board contactors is up to 800Vd. c.~1000Vd.c., rated current is 200A~400A). The size and cost of a DC contactor are determined by the rated voltage and rated current level of the contactor. The increase in voltage and current will inevitably lead to an increase in size and cost. [0003] In the current DC fast charging circuit, whether it is the power supply side of the DC fast charging devic...

AI Technical Summary

Problems solved by technology

[0003] In the current DC fast charging circuit, whether it is the power supply side of the DC fast charging device or the inside of the power distribution box (PDU) on the car, due to safety regulations (after the car is fully charged, there must be isolation between the charging port / charging gun and the live power supply fracture), and a high-voltage DC contactor is installed on the positive and negative pole lines, which greatly increases the total cost and volume of the charging circuit device

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