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Soft packing lithium ion battery and method of producing same

A technology of lithium-ion battery and manufacturing method, which is applied in the manufacture of soft-packaged lithium-ion batteries and in the field of soft-packaged lithium-ion batteries, can solve the problem of difficult control of the center distance between the positive and negative tabs, difficulty in matching the center distance of the battery cell with the center distance of the protective plate, and difficulty in positive , the precise positioning of the negative tab, etc., to meet the requirements of the center distance of the tab, reduce inventory, and improve the pass rate

Active Publication Date: 2010-03-24
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to accurately position the positive and negative tabs in the flexible packaging process, making it difficult to control the center distance between the positive and negative tabs
However, when the center distance of the pads of the protection board is fixed, the center distance of the positive and negative tabs of the battery is only allowed to fluctuate within a fixed range. The accuracy of the flexible packaging packaging process determines the center distance of the positive and negative tabs of the battery. It is difficult to match the center distance of the pads of the protection board

Method used

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  • Soft packing lithium ion battery and method of producing same
  • Soft packing lithium ion battery and method of producing same
  • Soft packing lithium ion battery and method of producing same

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: Manufacturing method of flexible packaging lithium-ion battery

[0043] see figure 1 , shows the structure of the formed cell 1; the positive tab is made of a nickel strip 3 welded on an aluminum strip 2, and the positive tab is welded on the positive sheet; the negative tab is a nickel strip 4, and the negative tab is welded on the negative sheet The positive electrode sheet and the negative electrode sheet are wound or laminated to form the battery core 1, and a small part of the aluminum strip 2 and the nickel strip 3 of the positive tab are exposed outside the battery core 1, and the nickel strip 4 of the negative tab is also partially exposed on the battery core. 1 outside.

[0044] see figure 2 The nickel strip 4 of the negative tab is used as the base strip, and the exposed part of the base strip 4 outside the cell 1 is cut into a suitable shape and size. The so-called suitable shape and size means that the remaining exposed part matches the adj...

Embodiment 2

[0048] Example 2: Flexible packaging lithium-ion battery

[0049] The battery cell 1 is provided with a positive pole ear and a negative pole ear, and the positive pole ear and the negative pole ear are set with a sealing ring 7 near the battery core 1; The nickel strip 3 on the exposed part of the aluminum strip 2; the negative tab is cut into a suitable shape and size by cutting the exposed part of the base strip 4 made of the nickel metal strip outside the battery core 1, and then adjusting the nickel metal strip. The strip 5 is electrically connected to the remaining exposed part of the base strip 4 by welding to form a new negative tab. The center distance of the positive and negative tabs fluctuates within the specified range to ensure a high pass rate of the product.

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Abstract

The invention provides a soft packing lithium ion battery and a method of producing the same. The electrical core of the lithium ion battery is provided with two electrode lugs, and the parts of the electrode lugs, which are exposed outside the electrical core of the lithium ion battery, meet the connection requirements. An adjusting belt with matchable shape and size is electrically connected with the parts of the electrode lugs, which are exposed outside the electrical core of the lithium ion battery, to form a new electrode lug. The soft packing lithium ion battery can better meet the requirement of the center distance between the electrode lugs, and the method of producing the soft packing lithium ion battery is easy and feasible and can be operated on the existing equipment of the battery manufacturer. The method of producing the soft packing lithium ion battery can be also used for modifying the structure of the prior soft packing lithium ion battery so as to ensure that the center distance between a positive electrode lug and a negative electrode lug of the manufactured or modified soft packing lithium ion battery is in a specified fluctuation range, thus the qualification rate of the electrical core of the lithium ion battery is improved, the materials in stock are reduced and the cost is lowered.

Description

【Technical field】 [0001] The invention relates to a method for manufacturing a soft-packaged lithium-ion battery, in particular to a method for manufacturing a soft-packaged lithium-ion battery that ensures accurate center distances of tabs. [0002] The invention relates to a soft-packaged lithium ion battery, in particular to a soft-packaged lithium-ion battery with precise lug center distance. 【Background technique】 [0003] As lithium-ion batteries are used in many consumer electronics products, such as mobile phones, notebook computers, PDA products, audio and video players, etc., the safety performance of lithium-ion batteries has attracted more and more attention from the industry and consumers. Therefore, the industry proposes to install a protection board on the battery cell of the lithium-ion battery to realize protection including but not limited to overcharge protection, over-discharge protection, short-circuit protection, etc., so as to improve the safety perfor...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M2/20H01M50/536
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 黄东张持朝刘金山
Owner ZHENGZHOU BAK BATTERY CO LTD
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