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High-voltage relay ceramic closed cavity structure, high-voltage relay and its working method

A high-voltage relay, closed cavity technology, applied in relays, electromagnetic relays, electromagnetic relay details, etc., can solve the problems of unreliable contact and failure of relays, and improve the ability to resist extreme large current shocks and reverse voltage capabilities. , to ensure the effect of contact reliability

Active Publication Date: 2021-09-07
SHANGHAI HUGONG AUTO ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One is: the directional problem of requiring external loads due to the addition of permanent magnets
[0006] The second is: due to the electromagnetic force generated by the super-large current in the magnetic field, the contact piece bounces off, resulting in unreliable contact or even failure of the relay.

Method used

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  • High-voltage relay ceramic closed cavity structure, high-voltage relay and its working method
  • High-voltage relay ceramic closed cavity structure, high-voltage relay and its working method
  • High-voltage relay ceramic closed cavity structure, high-voltage relay and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment one (comparative example):

[0048] Examples of arc extinguishing work for existing relays:

[0049] For the convenience of introduction, the structure here is simplified, see Figure 3-6 : The permanent magnets of existing products are arranged on both sides of the contact point rod in the Y direction, such as Figure 3-4 Shown, the arc extinguishing magnetic field produced by the permanent magnet, continue to refer to Figure 5-6 , when the external high-voltage and high-current load of the relay flows forward as shown in the figure, the arc between the contact piece and the contact rod is pulled to both sides of the contact rod according to the left-hand rule under the action of the magnetic field formed by the permanent magnet , in order to achieve the purpose of thinning the arc and extinguishing it quickly, such as Figure 6 shown; on the contrary, as Figure 7-8 As shown, if the external high-voltage and large current is reversed, that is, when it ...

Embodiment 2

[0053] For the convenience of introduction, the structure here is simplified, see Figure 9-13 :

[0054] The relay sets its permanent magnets on the left and right sides of the contact rod in the X direction, such as Figure 10 As shown, the arc extinguishing magnetic field produced by the permanent magnet is as follows Figure 9 As shown, when the external high-voltage and high-current load of the relay is pressed Figure 12 In the forward direction, the arc between the contact piece and the contact rod is under the action of the magnetic field formed by the permanent magnet. According to the left-hand rule, the arc of the left contact rod 3 is pulled to the left, and the arc of the right contact rod 4 is pulled to the left. The arc is pulled to the right to achieve the purpose of thinning the arc and extinguishing it quickly, such as Figure 11-13 Conversely, if the external high-voltage and large current is reversed, the arc of the right contact rod 3 is pulled to the r...

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Abstract

The invention relates to a ceramic closed cavity structure of a high-voltage relay. The direction of the line connecting the axes of a pair of contact rods is the X direction, and the direction perpendicular to the line connecting the axes of the pair of contact rods is the Y direction; A pair of permanent magnets are arranged on both sides of a pair of contact rods; the two ends of the contact piece used to make the contact rod conduction are added with an upper magnetic conduction ring and a lower magnetic conduction ring, and the upper magnetic conduction ring is fixed to the shaft of the pull rod Connection; the top of the rod shaft is fixedly connected with the upper magnetic ring, and the lower magnetic ring has a small hole for the rod shaft to pass through freely. The lower magnetic ring is supported by an overtravel spring. One end of the overtravel spring is fixed, and the other end can drive down The magnetic ring floats; when the contact piece has an extremely large current passing through, the upper and lower magnetic rings around the contact piece form a closed circular magnetic circuit, and the lower magnetic ring has an upward thrust on the contact piece under the action of electromagnetic attraction, overcoming And counteract the downward separation force generated by the extremely large current on the contact piece.

Description

technical field [0001] The invention relates to a high-voltage relay and belongs to the technical field of relays. Background technique [0002] The high-voltage relay is the connection channel between the new energy vehicle battery system and the motor controller, and is the necessary and core electronic control basic component in the medium and high voltage system of the new energy vehicle. Its function is to turn on or off the high-voltage and high-current load. Due to the small installation space on the car, the high-voltage relay for the car must have the basic functions of high voltage resistance, load resistance, impact resistance, arc extinguishing ability and breaking ability. In addition, it also needs to be small in size and compact in structure. Whether the above requirements can be realized depends on the structural design of the key component of the high voltage relay - the ceramic sealed cavity. [0003] In the process of connecting or disconnecting high-vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H50/02H01H50/56H01H50/64
CPCH01H50/023H01H50/56H01H50/641
Inventor 黄国忠席杰明王晓兰
Owner SHANGHAI HUGONG AUTO ELECTRIC
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