Lug, rolled lithium ion cell and soft-package rolled lithium ion battery

A lithium-ion battery and cell technology, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as poor consistency of batch batteries, poor electrical connection firmness, thicker battery thickness, etc., to achieve Ensure consistent shape, consistent tension, and improve the effect of consistency

Inactive Publication Date: 2012-01-25
SHENZHEN GREPOW BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of winding the lithium-ion battery, in order to wind the whole wound battery core, the separator 203 is in a tensioned state during the winding process, and because it is in a tensioned state during the winding process, the winding battery core At this value, there will be a certain gap at the fixed part of the strip-shaped tab. After the winding is completed, the tension of the separator 203 will be different, resulting in an "S"-shaped uneven surface of the wound cell, which will lead to softness. The surface of the package lithium-ion battery is uneven "S" shape, resulting in thicker assembled battery thickness, and poor consistency of batch batteries in the production process
[0007] Especially, when the thickness of the tab main body 101 of straight strip shape is about thick, above-mentioned problem is just more outstanding.
However, if the thickness of the straight tab main body 101 is blindly reduced, the internal resistance of the battery will be large and the firmness of its internal electrical connection will be poor.

Method used

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  • Lug, rolled lithium ion cell and soft-package rolled lithium ion battery
  • Lug, rolled lithium ion cell and soft-package rolled lithium ion battery
  • Lug, rolled lithium ion cell and soft-package rolled lithium ion battery

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046] This embodiment provides a tab for a soft-pack lithium-ion battery. see image 3 As shown, the tab 300 of this embodiment can be used as the positive tab 4041 and the negative tab 4042 .

[0047] The tab 300 is composed of a metal foil 301 and tab glue 302. The difference between the tab 300 of this embodiment and the straight tab 100 in the prior art is that:

[0048]The metal foil 301 of the tab 300 in this embodiment is not a long and narrow straight strip, but consists of two sections with different widths: an elongated section 3011 and a wide rectangular section 3012, wherein the width of the elongated section 3011 W1 is less than the width W2 of wide rectangular segment 3012 .

[0049] The tab glue 302 is pasted on the two surfaces of the predetermined section on the elongated section 3011, and the tab glue 302 has a certain distance from the wide rectangular section 3012, so that the PP layer on the surface of the tab glue 302 is heat-sealed with the outer pack...

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Abstract

The invention relates to the field of lithium ion battery designs, and discloses a lug, a rolled lithium ion cell and a soft-package rolled lithium ion battery. The lug comprises a foil and lug adhesive, the foil consists of a lathy section and a rectangular section, wherein the width of the rectangular section is larger than the width of the lathy section; and the lug adhesive is stuck on both surfaces of one predetermined section of the lathy section, and is a predetermined distance away from the rectangular section. The lug applied in the soft-package rolled lithium ion battery can help to improve the smoothness of the surfaces of the rolled cell and the soft-package rolled lithium ion battery and increase the convenience of production.

Description

technical field [0001] The invention relates to the field of lithium ion battery design, in particular to a pole piece, a wound lithium ion battery cell and a battery. Background technique [0002] Due to the advantages of light weight, small size, large capacity and fast charging speed, lithium-ion batteries are widely used in various digital and communication products such as laptop lights. [0003] Winding lithium-ion battery is a kind of lithium-ion battery commonly used at present, see figure 1 , 2 As shown, the manufacturing process of a common winding lithium-ion battery is mainly as follows: [0004] A predetermined active material is coated on the metal substrate to form the negative electrode sheet 202 or the positive electrode sheet 201, and the straight negative electrode ear 2042 and the positive electrode ear 2041 are respectively drawn out by welding or riveting on the negative electrode sheet 202 and the positive electrode sheet 201, and the positive electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M2/26
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 张继锋何安轩胡远升
Owner SHENZHEN GREPOW BATTERY CO LTD
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