Rectangular lithium ion battery ear-pole and its making method, battery

A lithium-ion battery and tab technology, which is applied in the field of square lithium-ion battery tabs and lithium-ion batteries, can solve the problem of increasing the difficulty of welding or riveting between tabs and cover plates, welding or riveting is not firm, positive and negative electrodes Short circuit and other problems, to achieve the effect of reducing internal resistance drift, reducing the possibility of short circuit phenomenon, and good contact

Active Publication Date: 2007-09-12
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current battery manufacturing process, strip-shaped lugs of equal width are welded to the pole piece, and then the winding and flattening of the battery core are performed. When the lug and the cover plate are welded, because the length of the lug is not easy to control, it is easy to contact with the battery case and cause a short circuit. Therefore, our company has developed such a battery, that is, the lug (positive lug or negative lug) On the narrower side of the wound battery core body, the shortcomings of the above-mentioned batteries are overcome

Method used

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  • Rectangular lithium ion battery ear-pole and its making method, battery
  • Rectangular lithium ion battery ear-pole and its making method, battery
  • Rectangular lithium ion battery ear-pole and its making method, battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Embodiment 1. A manufacturing method of a square lithium ion battery pole lug and a square lithium ion battery pole lug. One end of the pole lug used to connect with the cover plate is made wide enough so that it can be easily and electrically connected to the cover plate. , the other end of the tab used for connecting with the positive or negative plate is made narrow enough to avoid puncturing the diaphragm paper when making the battery and to facilitate the battery to be inserted into the shell. As shown in Figure 1, the tabs of the square lithium-ion battery are bar tabs 1. The bar tabs 1 are composed of segments 2 and 3. The segment 2 near the upper end of the bar tab is wider, and the segment 3 near the lower end is wider. Narrow, each of equal width segment 2 and segment 3 are connected as a whole.

Example Embodiment

[0016] Example 2: Manufacture 1000 square steel shell lithium-ion battery cell bodies with model number 033448S, as shown in Figures 1 and 2, including the cell body 5, the positive electrode tab 1, the negative electrode tab 6 and the cover plate 4 1. The structure of the positive electrode lug 1 is a bar-shaped lug as shown in Figure 1. The wider upper section 2 of the positive electrode lug 1 is welded or riveted to the cover plate 4, and the lower section 3 of the positive electrode lug 1 is narrower and the positive electrode piece. Welded and located on the narrow side of the cell body 5 , the negative electrode tab 6 is welded on the negative electrode sheet (not numbered) of the cell body 5 . Then, the lithium-ion battery was obtained according to the conventional production method, set as group 1, and its short-circuit rate was measured.

[0017] 1000 lithium-ion batteries of the same type were manufactured in the same way using tabs of equal width, set as group 2, an...

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Abstract

This invention discloses one rectangle lithium ion battery ear and its process method, wherein, the ear is of bar electrode ear with different width, one is wider nearly and the other is thinner. The process method comprises the following steps: processing one end of electrode ear wide enough connected to cover board to be connected to cover board easily; processing the other end thin enough of ear to avoid pore through isolation film in process. This invention discloses one rectangle lithium ion battery comprising electrode slices, bar electrode ear and cover board with one end wider and the other end thinner.

Description

【Technical field】 [0001] The invention relates to a square lithium ion battery tab and the lithium ion battery. 【Background technique】 [0002] Lithium-ion secondary batteries have outstanding characteristics such as high working voltage, large specific energy, small self-discharge, wide application temperature range, stable working voltage, and long storage life. Products, electric vehicles, and aerospace applications have shown great interest and enthusiasm, and have continued to explore and improve the performance and manufacturing process of lithium-ion secondary batteries. [0003] In the current battery manufacturing process, strip-shaped lugs of equal width are welded to the pole piece, and then the winding and flattening of the battery core are performed. When the lug and the cover plate are welded, because the length of the lug is not easy to control, it is easy to contact with the battery case and cause a short circuit. Therefore, our company has developed such a ...

Claims

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Application Information

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IPC IPC(8): H01M2/30H01M10/40H01M2/26H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 黄加军邵戈高学宝邓燕邓华利王申
Owner ZHENGZHOU BAK BATTERY CO LTD
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