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Battery, battery case and battery case welding method

A welding method and battery case technology, which is applied to battery pack components, circuits, electrical components, etc., can solve the problems of battery safety, poor sealing and heat dissipation, and achieve the effect of high reliability and small gaps

Active Publication Date: 2021-01-22
SHENZHEN TATFOOK QUAINTFAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a battery, a battery case, and a battery case welding method to solve the technical problems of poor battery safety, sealing and heat dissipation in the prior art

Method used

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  • Battery, battery case and battery case welding method
  • Battery, battery case and battery case welding method
  • Battery, battery case and battery case welding method

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Effect test

Embodiment 1

[0044] Please also refer to figure 2 and Figure 4 , Figure 4 is a structural schematic diagram of the first embodiment of the battery case welding method of the present invention, that is figure 2Partial enlarged view of the structure A of the welding part in the embodiment; in this embodiment, the welding edges (215 and 225) on both sides of the welding part of the battery case are parallel to the sides of the battery case, overlapping and closely arranged, and the welding edge 215 of the upper case 210 The top surface of the upper shell is bent at right angles, and the welding edge 225 of the lower shell 220 is a straight edge, which is equivalent to the welding edge 215 of the upper shell 210 enclosing the welding edge 225 of the lower shell 220, and the laser welding lines 202 are welded on both sides. Wavy distribution on the outer side of the overlapping surface.

[0045] Of course, the wavy shape of the laser welding lines 202 is not limited to the straight line ...

Embodiment 2

[0050] Please also refer to Figure 6 and Figure 7 , Figure 6 It is a structural schematic diagram of the second embodiment of the battery case welding method of the present invention; Figure 7 yes Figure 6 Partial enlarged view of structure B at the welding site in the embodiment. In this embodiment, the welding edges (215, 225) on both sides of the welding part of the battery case extend outward along the side of the battery case, and the welding edges (215, 225) on both sides are overlapped and arranged closely, and the laser welding lines 202 are on both sides. The outer sides of the overlapping surfaces of the welding edges (215, 225) are distributed in waves.

[0051] Preferably, the welding edges (215, 225) on both sides are bent at right angles to the side of the battery case. Also preferably, the material of the battery case 200 (including the upper case 210 and the lower case 220) is 0.07 mm thick stainless steel, laser The spot diameter of welding is 0.08mm...

Embodiment 3

[0054] see Figure 8 , Figure 8 It is an enlarged schematic diagram of the structure of the welding part of the third embodiment of the battery case welding method of the present invention, in Figure 6 In the embodiment, since the welding edges (215, 225) on both sides are bent at right angles relative to the side of the battery case, the welding edges protrude outward relative to the case, which will increase the peripheral size of the battery case. Therefore, this embodiment as Figure 6 A modification of the embodiment, in Figure 6 On the basis of the embodiments, the welded overlapping faces are bent in a direction parallel to the side of the battery case, so as to reduce the peripheral size of the battery case and make the battery case more beautiful as a whole.

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Abstract

A battery, a battery case (200), and a battery case (200) welding method, the welding method is to form a sealed cavity by laser full-circle corrugation welding of a battery case (200) composed of at least two parts; specifically: The welding edges (215, 225) on both sides of the welding part of the battery case (200) are parallel to the sides of the battery case (200), overlapping and closely arranged, and the laser welding lines (202) are on the overlapping surface of the welding edges (215, 225) on both sides Wavy distribution on the outside. Metal material is selected as the battery shell (200), and a sealed cavity is formed by laser full-circle corrugation welding. The battery shell (200) has small gaps between the upper and lower shells (210, 220) during assembly, and the reliability of laser welding is relatively high. High, good sealing performance and the overall appearance of the battery case (200) is beautiful.

Description

【Technical field】 [0001] The invention relates to the technical field of battery packaging, in particular to a battery, a battery case and a battery case welding method. 【Background technique】 [0002] As a commonly used energy supply unit, batteries have always been concerned about their safety. Traditional battery packaging structures such as figure 1 as shown, figure 1 It is a partial cross-sectional view of a commonly used battery packaging structure in the prior art. The battery packaging structure is as follows: the battery core 4 is put into the metal tube 2, the riveting compression port 5 is produced by riveting the metal tube 2, and the sealing end cover 3 Buckle and press in the metal tube 2 to form a sealed battery. This battery package has the following drawbacks: [0003] 1. The sealing performance of the riveted compression port 5 is poor, and once the electrolyte in the battery is heated and expanded, it will leak from here. [0004] 2. The heat dissipat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/119H01M50/186H01M50/30H01M50/10H01M50/103
CPCY02E60/10H01M50/30H01M50/103H01M50/186
Inventor 文洁何自坚
Owner SHENZHEN TATFOOK QUAINTFAB CO LTD
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