Laser welding method and device for battery component with bipolar structure

A technology of laser welding and concentrating devices, which is applied in laser welding equipment, electrical components, secondary batteries, etc., can solve problems such as imperfections, low yields, and high costs, and achieve extended service life, small welds, and improved finished products. rate effect

Inactive Publication Date: 2011-07-27
CHANGCHUN NETPOWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the imperfection of the welding process, many welding processes have shown the problems of high cost and low yield

Method used

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  • Laser welding method and device for battery component with bipolar structure
  • Laser welding method and device for battery component with bipolar structure
  • Laser welding method and device for battery component with bipolar structure

Examples

Experimental program
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Embodiment 1

[0084] The bipolar plate to be welded (polyethylene: carbon black: graphite=4:2:4, plane size is 470mm×470mm) is placed on the upper mold 25, and then the welded frame is placed on the upper mold, with One side of the flow channel faces up, the groove 21 of the frame coincides with the four sides of the bipolar plate, and the vacuum adsorption device is turned on to fix the position of the bipolar plate and the frame to be welded; call the welding program in the control software, and set the welding parameters , including a rectangular welding path, a welding length of 470mm, a welding width of 470mm, a laser welding power of 12W, and a speed of 2.8m / min. Click the start welding button in the program to start welding. After welding, the laser welding head returns to the original position, turns off the vacuum adsorption switch, and removes the welded product.

[0085]Observing the welded parts, the color of the weld seam of the electrode plate and the frame is relatively unifo...

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Abstract

The invention relates to a method for welding an insulated frame body and a bipolar plate/a microporous diaphragm of a battery with a bipolar structure by laser, wherein a laser from a laser source is focused on an opaque plate surface of the bipolar plate or the microporous diaphragm through the semitransparent frame body so as to melt an upper and a lower plastic plates of an irradiated part and thus to allow the two plates to be melted together under the effect of pressure. The method of the present invention improves the welding efficiency and greatly reduces reject rate. Besides, the method of the invention has the advantages of labor force saving and cost saving. The present invention also relates to a device of for welding the insulated frame body and the bipolar plate/the microporous diaphragm of the battery with a bipolar structure by laser.

Description

technical field [0001] The invention relates to the field of bipolar structure batteries, in particular to a welding method and device for bipolar structure battery components, especially bipolar plates or microporous diaphragm components. Background technique [0002] Those skilled in the art know that, compared with unipolar batteries, primary batteries of bipolar structure have smaller volume and weight, so they have higher mass specific energy and volume specific energy (energy density). At the same time, the primary battery with a bipolar structure can provide stable performance, and because the battery with a bipolar structure shortens the current flow distance, the internal resistance is reduced, and the use efficiency is increased. [0003] The so-called bipolar battery means that in a bipolar battery unit, it contains a conductive plate-bipolar plate that can separate each single battery and conduct current between adjacent single batteries. The bipolar plate usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38B23K26/24
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 孟琳吴正宇陈海龙
Owner CHANGCHUN NETPOWER TECH
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