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Winding type battery

A technology for batteries and battery casings, which is applied in the manufacture of secondary batteries, battery pack components, circuits, etc., can solve the problems of breaking or tearing between the connecting part 9' and the current collector, increasing the internal resistance of the battery, and falling off from welding, etc. Achieve the effect of avoiding the possibility of short circuit of battery cells, avoiding contact short circuit, and preventing welding from falling off

Inactive Publication Date: 2010-02-17
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is: because the battery unit will shake in the battery case, when the battery falls or is subjected to external impact, two situations often occur: a. The straight extension handle 8' is welded off with the inner wall of the battery, causing the battery The internal resistance of the internal battery increases, or even breaks; b. The connection part 9' and the current collector are broken or torn, resulting in an increase in internal resistance, or even a break

Method used

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  • Winding type battery
  • Winding type battery

Examples

Experimental program
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Embodiment

[0016] Embodiment, a kind of lithium ion battery of steel case, combine Figure 1-5 , including a cover plate 1 , a square cylindrical battery case 10 with a bottom, and a battery unit 6 sealed by the cover plate 1 , an electrolyte (not shown), and an insulating plate 2 housed inside the battery case 10 . Wherein the battery unit 6 comprises positive and negative electrode sheets and diaphragms that are overlapped and wound, and the diaphragm is positioned between the positive and negative electrode sheets to separate the two. The positive and negative active materials on both sides of the fluid, the positive tab 3 and the negative tab 4 are drawn out from the positive and negative current collectors respectively. The positive tab 3 is electrically connected to the conductive terminal 11 on the cover plate 1 . The negative pole tab 4 includes a connected collector connection part 9, a curved segment 12 and an extension handle 8. For the convenience of the negative pole tab 4 ...

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Abstract

Rolling type battery includes a cover board, tubular battery container with bottom, battery unit sealed by the cover board inside the battery container, and electrolyte. The battery unit includes lapped rolled positive, negative pole pieces, diaphragm, pole ear of positive pole, and pole ear of negative pole. One end of pole ear of positive pole is connected to positive pole piece, and one end ofpole ear of negative pole is connected to negative pole piece. The other end of one pole ear is connected to conductive terminal on the cover board electrically. The other end of the other pole ear iswelded to inner wall of the battery container or welded to connection seam between the cover board and the battery container. Through a forniciform segment, the other end of the said pole ear weldedto seam is connected to positive pole piece or negative pole piece. The disclosed battery provides more stable electrical connecting capability among pole ears, pole pieces, and battery container.

Description

technical field [0001] The invention relates to a battery, in particular to a metal shell ion battery. Especially suitable for lithium-ion batteries, nickel-hydrogen batteries, etc. Background technique [0002] Winding batteries, mainly lithium-ion batteries and nickel-metal hydride batteries, have been widely used in MP3, MP4, personal digital assistants, mobile phones, digital cameras, power tools, toys and other mobile products. Taking a square battery as an example, it includes a cover plate, a square cylindrical battery case with a bottom, and a battery unit sealed by the cover plate and electrolyte contained inside the battery case; figure 1 As shown, the battery cell includes overlapping winding positive and negative electrode sheets and a separator, and the separator is located between the positive and negative electrode sheets to separate the two. The positive and negative electrode sheets include positive and negative electrode current collectors and coated on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/06H01M2/26H01M2/36H01M10/04H01M50/172H01M50/533H01M50/59H01M50/593H01M50/595
CPCY02E60/10Y02P70/50
Inventor 邹延龙凌安璋陈华武
Owner ZHENGZHOU BAK BATTERY CO LTD
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