Normally open high-current relay for vehicle

Abstract

The invention discloses a normally open high-current relay for a vehicle. The relay comprises an electromagnetic mechanism, a connection base and a shell, wherein the electromagnetic mechanism consists of an armature component and a yoke component; the armature component consists of a moving contact assembly, an armature, a reed, a conducting strip and a tension spring; the moving contact assembly is spot-welded on the conducting strip; the conducting strip is riveted on the reed; the reed is connected with the yoke component through the tension spring; and the reed is made of a stainless steel material of 0.4mm and the conducting strip is made of a pure copper material. By improving the conventional high-capacity high-current new-energy normally open relay for the vehicle, the relay solves the problems of difficult spot welding of copper stranded wires, specific requirement on equipment for spot welding and unnecessary high accuracy requirement on parts, simplifies the design of the parts, improves the qualification rate of products and saves the cost of the products.

Description

technical field [0001] The invention relates to the technical field of automotive electronic components, in particular to a normally open high-current relay for a vehicle. Background technique [0002] With the rapid development of the automobile industry, especially the development of new energy vehicles in recent years, new requirements have been put forward for automotive relays, such as high-capacity current 100A ~ 300A, or even larger, and the coil voltage has also increased from 12VDC / 24VDC To 42VDC, the load voltage is even higher to 400VDC, etc., resulting in some new requirements for relay structure and technology, such as bridge contact structure, magnetic blowing technology, sealed contact chamber filled with protective gas, etc. Such as figure 1 The one shown is a product of American Tyco Company, which uses a bridge contact structure. image 3 It is a three-dimensional structural schematic diagram of its armature assembly. The moving contact group 1 is connec...

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Problems solved by technology

The moving contact group 1 is connected by spot welding of copper strands 13, but the cross-sectional area of ​​such copper strands is 8-10mm 2 , requires high-capacity spot welding equipment, and requires cooling or anti-oxidation treatment during spot welding, and the operation is more complicated and difficult; the material of the reed 15 is 0.4mm stainless steel and has an L-shaped integral structure. The size requirements of the process and parts are very high, because the hardness of 0.4mm stainless steel is very hard in the relay industry, and the L shape determines that there is no room for adjustment, which is not suitable for mass production of small and medium-sized enterprises

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