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Electric vehicle main power switch

A technology for electric vehicles and total power supply, applied in electromagnetic relays, detailed information of electromagnetic relays, circuits, etc., can solve problems such as unusable main power switches, and achieve the effect of preventing deformation and reducing temperature rise

Inactive Publication Date: 2016-04-06
CHANGZHOU BOMAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the existing main power switch of electric vehicles cannot be used under the condition of large input load, and it is necessary to design a main power switch of electric vehicles that can be used under the condition of large input load

Method used

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  • Electric vehicle main power switch
  • Electric vehicle main power switch
  • Electric vehicle main power switch

Examples

Experimental program
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Embodiment 1

[0035] The electric vehicle total power switch of the present embodiment comprises yoke iron 1, bobbin 2, coil 3, iron core 4, armature 5, extension spring 6, moving reed 7, moving contact 8, supporting piece 9, static reed 10. Static contacts 11, brush wires 12 and insulating materials.

[0036] The yoke 1 includes a horizontal portion 1-1 disposed horizontally and a vertical portion 1-2 disposed vertically. The coil bobbin 2 is fixed on the horizontal part 1-1 of the yoke 1, and the coil bobbin 2 includes a coil installation part 2-1 and a contact installation part 2-2. The coil 3 is wound on the coil installation part 2 - 1 of the coil bobbin 2 , and the two lead-out terminals 3 - 1 of the coil 3 are fixed on the coil installation part 2 - 1 of the coil bobbin 2 . The power consumption of the coil 3 is ≤5.5W. The iron core 4 is fixed at the center of the coil installation part 2 - 1 of the bobbin 2 . The middle part of the armature 5 is supported by the vertical part 1-2...

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Abstract

The invention discloses a main power switch of an electric vehicle. N movable contact springs are distributed side by side and are mutually insulated. One end of each movable contact spring is fixed to an armature in an insulating mode, and the other end of each movable contact spring extends into a contact installation portion of a coil framework and is fixedly provided with two movable contacts; N+1 static contact springs are arranged side by side and are insulated mutually; the static contact springs are fixed to the inner bottom of the contact installation portion of the coil framework, the static contact springs on the two sides of the contact installation portion of the coil framework are respectively and fixedly provided with a static contact, and other static contact springs are respectively provided with two static contacts; the static contacts and the movable contacts are in one-to-one correspondence in an up-down mode, and N is a natural number. By means of multiple sets of structures composed of two movable contacts and two static contacts, contact gaps can be increased by N times, the speed of switching on a switch is increased by N times, the difficulty of arc extinction is effectively solved, and the application requirements of the main power switch of the electric vehicle in high-voltage high-current loads are met.

Description

technical field [0001] The invention relates to a general power switch of an electric vehicle. Background technique [0002] When the main power switch of an electric vehicle is under a large input load, such as DC voltage ≥ 50V, current ≥ 50A load, when the vehicle is started and the main power switch is turned off, a blue arc that cannot be extinguished will appear between the moving and static contacts. Make the contacts burn out and fail. At present, the arc extinguishing method adopted by various manufacturers is to add an enhanced arc extinguishing circuit, usually by connecting capacitors in parallel at both ends of the contact to absorb the arc. However, the cost of the external arc extinguishing circuit is high and the reliability is low. When the current reaches a certain value, a large amount of back EMF will appear, and the capacitor cannot absorb the huge arc formed by the back EMF, and the main power switch of the electric vehicle will still fail. At the same...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H50/54H01H50/18H01H50/44
Inventor 李卫东钱兴娟
Owner CHANGZHOU BOMAI ELECTRONICS
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