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Lithium ion battery casing, its manufacturing method and battery

A technology of lithium-ion batteries and manufacturing methods, which is applied to the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve problems such as life-threatening, easy to tear, and safety issues, and achieve safety and yield , Improved safety and yield, high accuracy and safety effects

Active Publication Date: 2006-05-10
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current battery production process, there are still some problems that seem to be details that actually affect the overall yield and quality of the battery to a large extent.
For example, due to the short circuit between the battery cell and the battery case, the battery is scrapped or a safety hazard is caused
There are many reasons for the short circuit between the battery cell and the battery shell, such as the exposed edge of the current collector at both ends of the battery cell, the peeling or damage of the insulating tape on the outer layer of the battery cell used to paste the end of the winding pole piece, etc., which may easily cause the battery to fail. short circuit fault
Among these causes, especially after the wound battery cell is put into the shell, the conductive terminals drawn out from the pole piece are most likely to cause a short circuit in the finished battery, because the length of the conductive terminal of the pole piece is not easy to control, and it is not easy to be welded to the cover if it is too short If it is too long, it will easily bend at the opening of the battery case and contact the battery case, causing a short circuit of the battery, which will lead to the scrapping of the battery. life safety

Method used

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  • Lithium ion battery casing, its manufacturing method and battery
  • Lithium ion battery casing, its manufacturing method and battery
  • Lithium ion battery casing, its manufacturing method and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of lithium-ion battery case, combined with figure 1 , including a battery case 1 and a high-temperature adhesive tape 2 as an insulating layer. The high-temperature tape 2 is pasted on the inner wall of the battery case near the opening of the battery case 1, and the distance between the high-temperature tape 2 and the cutout 3 of the battery case is 1 mm.

[0018] When manufacturing a lithium-ion battery, the battery cell 4 is put into the battery case 1 . Note that the welding curved surface of the conductive terminal 5 connecting the battery cell 4 to the cover plate 6 corresponds to the insulating layer 2 on the battery case 1, because the curved part of the conductive terminal 5 is the closest part to the inner wall of the battery case 1 . Then another conductive terminal 8 is welded to the other side of the cover plate as the positive lead. The parts where the conductive terminal 5 and the conductive terminal 8 are welded on the cover plate ...

Embodiment 2

[0023] Embodiment 2, another kind of lithium-ion battery case, combined with figure 2 , its structure is basically the same as that of Embodiment 1, except that an insulating layer is also provided on the inner wall of the housing opposite to the position where the insulating layer is provided in Embodiment 1. The insulating layer 7 is formed by coating high temperature resistant insulating glue at this position.

[0024] Comparative analysis:

[0025] Using the battery case in Example 2, the finished lithium-ion battery model 053048A1 was manufactured according to the conventional process as 3 groups.

[0026] Table 2

[0027]

[0028] It can be seen from Table 1 and Table 2 that the short-circuit rate of the lithium-ion battery using the battery case of the present invention is significantly reduced, indicating that the battery case of the present invention has a good effect of improving battery yield and safety. It can also be fou...

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Abstract

This invention discloses one lithium ion battery shell, which comprises battery shell and cover board with isolation layer inside wall. This invention discloses the battery shell process method and the lithium ion battery in use of battery shell. The advantages of this invention comprise the following: the battery shell inside wall is set with isolation layer to lower the shortcut rate of local battery to improve battery safety and product rate.

Description

【Technical field】 [0001] The invention relates to high-energy battery technology, in particular to a lithium ion battery case, a manufacturing method of the battery case and a battery using the battery case. 【Background technique】 [0002] Lithium-ion battery is a high-performance secondary battery, which has the advantages of high working voltage, high volume and energy density, long life, low self-discharge rate, no memory effect and good for the environment. It is widely used in mobile communication equipment, notebook Computers, camcorders, PDAs (personal digital assistants), digital cameras, power tools, torpedoes, missiles and other fields. All countries in the world have expressed great interest and enthusiasm for the application of lithium-ion secondary batteries in the field of communications, portable electronic products, electric vehicles, and aerospace, and conducted research on the performance and manufacturing process of lithium-ion secondary batteries. Contin...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058H01M50/102
CPCY02E60/10Y02P70/50
Inventor 邵戈张志文高学宝邓燕邓华利王申
Owner ZHENGZHOU BAK BATTERY CO LTD
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