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Cylindrical-structure lithium ion battery and preparation method thereof

A lithium ion, cylindrical technology, applied in the field of lithium ion cylindrical structure battery and its preparation, can solve the problems of large energy density limitation, large occupied space, small utilization space, etc., to improve safety, service life, convenience The effect of storing packaging and improving utilization

Active Publication Date: 2016-06-01
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a lithium-ion cylindrical structure battery and its preparation method to solve the technical problems in the prior art that the overall space occupied by the battery is large, the actual space used is relatively small, and there are relatively large restrictions on improving the energy density of the battery.

Method used

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  • Cylindrical-structure lithium ion battery and preparation method thereof
  • Cylindrical-structure lithium ion battery and preparation method thereof
  • Cylindrical-structure lithium ion battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as Figure 2-7 As shown, a lithium-ion cylindrical structure battery includes a cylindrical cell 1, the cell 1 is wrapped with a packaging film 2, and the positive tab 11 and the negative tab 12 of the cell 1 pass through the packaging film 2;

[0035] On the side wall of the battery cell 1 with the positive tab 11 and the negative tab 12 , the axes of the positive tab 11 , the negative tab 12 and the cell 1 are parallel to each other and have the same orientation.

[0036] The positive tab 11 and the negative tab 12 are located on the same circumference, and the outer wall of the packaging film 2 is provided with a circular sealing edge 3 for encapsulating the positive tab 11 and the negative tab 12 .

[0037] The positive tab 11 and the negative tab 12 are located on the same circumference, wherein, preferably, the positive tab 11 and the negative tab 12 are located at the same height on the side wall of the cell 1 , and are both arranged at the center of the cel...

Embodiment 2

[0043] Such as Figure 2-7 Shown, a kind of preparation method of lithium-ion cylindrical structure battery comprises the following steps:

[0044] The positive pole piece 13 and the negative pole piece 14 are respectively connected with the positive pole tab 11 and the negative pole pole piece 12. After that, the positive pole piece 13, the separator 15, the negative pole piece 14, and the membrane 15 are superimposed and wound into a cell 1, wherein the positive pole piece 11 and the negative pole piece 12 set at the tail end of the winding;

[0045] Respectively bend the positive tab 11 and the negative tab 12 into a horizontal state;

[0046] Stamping the packaging film 2 with grooves through the mold, placing the battery cell 1 in the packaging film 2 for packaging, and then sequentially performing liquid injection, chemical formation, molding, volume separation, and cutting and edge sealing;

[0047] After cutting and sealing, carry out shaping processing on the positi...

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Abstract

The invention discloses a cylindrical-structure lithium ion battery and a preparation method thereof. The cylindrical-structure lithium ion battery comprises a cylindrical cell externally coated with a packaging film; a positive tab and a negative tab of the cell penetrate through the packaging film; the positive tab and the negative tab are arranged on the side wall of the cell and parallel with the axis of the cell and has the same orientation with the cell axis. Adoption of the cylindrical-structure lithium ion battery and the preparation method thereof abandons steel shell structure batteries with high cost, heavy weight and poor safety and soft-packaged batteries with a low energy ratio; the cylindrical-structure lithium ion battery and the preparation method thereof have the advantages of higher safety and energy ratio and longer service life.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion cylindrical structure battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, fast charging and discharging, recyclable use, and long life. They have become the mainstream of the battery energy market and are widely used in military and civilian products. With the development of society, people's requirements for lithium-ion batteries are not limited to the reliability and safety of batteries, but also have higher and higher requirements for the performance and structure of batteries. [0003] With the rise of wearable products, the miniaturization and diversification of battery products are becoming more and more obvious. At the same time, due to the higher and higher requirements for equipment battery life, this requires manufacturers to improve as much as possible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/058H01M50/547
CPCH01M10/058H01M50/531Y02E60/10Y02P70/50
Inventor 李木坚葛辉明吕正中刘金成
Owner EVE ENERGY CO LTD
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