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Winding cells and batteries

A wound-type battery technology, which is applied in the field of wound-type batteries and batteries with said wound-type batteries, can solve problems such as tearing, wrinkles, short-circuit hazards, current collector burrs or sharp corners, etc. Achieve the effect of improving safety and reducing the probability of short circuit occurrence

Active Publication Date: 2022-07-15
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the battery is dropped or impacted by external force, the current collector of the outer ring of the battery inside the battery is prone to tearing, wrinkles and other damages, and the current collector will produce burrs or sharp corners, which will cause a short circuit hazard

Method used

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  • Winding cells and batteries
  • Winding cells and batteries
  • Winding cells and batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] using as figure 2 The shown wound battery core 20 is filled with liquid, packaged, and chemically formed to obtain 20 finished batteries. Wherein, the head of the second adhesive member 30 is connected with the tail of the first adhesive member 28 shown, and the first adhesive member 28 completely covers the first current collector area 2313 and the second current collector area 2323 , the second adhesive member 30 completely covers the third current collector region 2324 . The head of the first adhesive member 28 is disposed on the first active material layer 236 . Along the winding direction W, the length of the first adhesive member 28 on the first active material layer 236 is 5 mm, and the total length of the first adhesive member 28 and the second adhesive member 30 is L2 +5, the length of the first adhesive member 28 and the second adhesive member 30 in the longitudinal direction of the wound battery core 20 is L3.

[0079] Example 1

[0080]using as figure...

Embodiment 2

[0082] using as Figure 4 The shown wound battery core 20 is filled with liquid, packaged, and chemically formed to obtain 20 finished batteries. The head of the first adhesive member 28 is connected to the tail of the insulating glue 80, and the head of the second adhesive member 30 is connected to the tail of the first adhesive member 28, so the The first adhesive member 28 completely covers the first current collector area 2313 and the second current collector area 2323 , and the second adhesive member 30 completely covers the third current collector area 2324 . The head of the first adhesive member 28 is disposed on the first active material layer 236 . Along the winding direction W, the length of the insulating adhesive 80 on the first active material layer 236 is 2 mm, the total length of the insulating adhesive 80 is 10 mm, the first adhesive member 28 and the second adhesive The total length of the connecting member 30 is L2-8, and the length of the first bonding mem...

Embodiment 3

[0084] using as figure 2 The shown wound battery core 20 is filled with liquid, packaged, and chemically formed to obtain a 20-component battery. Wherein, the head of the second adhesive member 30 is connected with the tail of the first adhesive member 28, and the first adhesive member 28 completely covers the first current collector area 2313 and the second current collector In the region 2323, the second adhesive member 30 partially covers the third current collector region 2324. The head of the first adhesive member 28 is disposed on the first active material layer 236 . Along the winding direction W, the length of the first adhesive member 28 on the first active material layer 236 is 2 mm, and the total length of the first adhesive member 28 and the second adhesive member 30 is L1 +5, the length of the first adhesive member 28 and the second adhesive member 30 in the longitudinal direction L of the wound battery core 20 is L3. The glue of the first adhesive member 28 a...

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Abstract

The present application provides an impact-resistant wound battery core, including a first pole piece. The first pole piece includes a first surface and a second surface. The first surface is provided with a first active material region and a first current collector region; the second surface is provided with a second active material region and a second current collector region. The first current collector area is located inside the outermost ring of the wound battery core. In the first pole piece, the second current collector area and the first current collector area are adjacent to and opposite to each other, and the first current collector area and the second current collector area are bonded by first bonding Piece bonding. The present application also provides a battery using the above-mentioned wound cell.

Description

technical field [0001] The present application relates to the field of electrochemical devices, and in particular, to a wound cell and a battery having the wound cell. Background technique [0002] Due to its high energy density, batteries can be widely used in various portable devices, such as notebooks, mobile phones, drones, and power banks. When the battery is dropped or hit by an external force, the outer ring current collector of the battery cell is prone to tearing, wrinkling and other damage, and the current collector will produce burrs or sharp corners, resulting in a short circuit hazard. SUMMARY OF THE INVENTION [0003] Based on the above deficiencies of the prior art, the present application provides a wound cell and battery capable of reducing the risk of short circuit. [0004] An embodiment of the present application provides a wound battery core, including: [0005] first pole piece, including [0006] a first surface, comprising a first active material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/10H01M10/04H01M10/0587
CPCH01M6/10H01M10/0431H01M10/0587H01M2220/30H01M10/052H01M10/4235H01M50/105H01M50/126H01M50/474H01M50/461Y02P70/50Y02E60/10
Inventor 苏辛如李保章陈晓石长川
Owner NINGDE AMPEREX TECH