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Combined production method for flexible package lithium cell

A manufacturing method and technology for lithium batteries, which are applied in the manufacture of electrolyte batteries, secondary batteries, primary batteries, etc., can solve the problems of unsatisfactory battery performance consistency, waste, and low efficiency, and achieve good consistency, reduce waste, and improve The effect of production efficiency

Inactive Publication Date: 2010-10-06
SHENZHEN B&K TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the formation process of the battery, the aluminum-plastic film used as the air cavity 42 or the reserved exhaust cavity needs to be cut off and treated as waste, resulting in a great waste. At the same time, the entire production process is a single battery production, which is not efficient. high
[0004] In addition, in the current market, digital consumer products have higher and higher requirements for the consistency of electrochemical properties such as capacity, internal resistance, and voltage of combined batteries. However, in the current production process of a single battery, often due to process conditions , changes in environmental conditions, etc., the consistency of battery performance is not ideal

Method used

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  • Combined production method for flexible package lithium cell
  • Combined production method for flexible package lithium cell
  • Combined production method for flexible package lithium cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to Figure 1a , 1b , The combined manufacturing method of embodiment 1 flexible packaging lithium battery comprises the following steps:

[0035] Extend the half surface of an aluminum-plastic film 1 the size of an A4 paper with a multi-cavity film tool to extend out 6 battery cell accommodation cavities 2 and 1 air cavity 5, the 6 battery cell accommodation cavities are arranged in a line, and the air cavity 5. Located on the right side of all battery cell accommodating cavities, put processed battery cells 3 in all battery cell accommodating cavities, and make the tabs 4 of all battery cells face the same direction;

[0036] Fold the aluminum-plastic film 1 in half along the midline so that the other half surface (i.e. the half surface without the accommodating cavity and the air cavity) is covered on the half-surface aluminum-plastic film containing the battery core, and the position of the battery core is pressed with a pressing film tool, so that Make the u...

Embodiment 2

[0041] refer to Figure 2a , 2b , The combination manufacturing method of embodiment 2 flexible packaging lithium battery comprises the following steps:

[0042] Extend an aluminum-plastic film 1 the size of A4 paper with a multi-cavity film tool to extend out 12 battery cell accommodation cavities 2 and 1 air cavity 5, and arrange the 12 battery cell accommodation cavities in two rows, and the air cavity 5 is located in the On the right side of all the battery cell accommodating cavities, put the processed battery cells 3 in all the battery cell accommodating cavities, and make the tabs 4 of the six battery cells in the rear row face backward, and make the tabs 4 of the six battery cells in the front row face backward. ears facing forward;

[0043] Cover another aluminum-plastic film 6 the size of A4 paper on the aluminum-plastic film 1 containing the battery core, press the position of the battery core with a pressing film tool, so that the upper and lower aluminum-plastic...

Embodiment 3

[0048] refer to Figure 3a , 3b , The combined manufacturing method of embodiment 3 flexible packaging lithium battery comprises the following steps:

[0049] Extend a piece of aluminum-plastic film 1 with a multi-cavity film tool to extend out 24 battery cell accommodation cavities 2 and 1 air cavity 5. The 24 battery cell accommodation cavities are arranged in four rows, and the air cavity 5 is located in all battery cell storage chambers. On the right side of the cavity, put the processed battery cells 3 in all the battery cell accommodation cavities, and make the tabs 4 of the 6 battery cells in the rear row all face backward, and the tabs 4 of the 18 battery cells in the first 3 rows are all facing backward. forward;

[0050] Cover another aluminum-plastic film 6 of the same size on the aluminum-plastic film 1 containing the battery core, press the position of the battery core with a pressing film tool, so that the upper and lower aluminum-plastic films are combined smo...

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Abstract

The invention relates to a combined preparation method for a soft package lithium cell, which includes steps: extending a plurality of cell core containing cavities in which cell cores are arranged and a single gas cavity on a bottom layer aluminum plastic film by a multi-cavity die; covering the a upper layer aluminum plastic film on the bottom layer aluminum plastic film, heat-sealing and heat-welding a pole ear adhesive position of a heat cell core and other three edges of the upper layer aluminum plastic film and the bottom layer aluminum plastic film except position of the gas cavity arranged; vacuuming, filling electrolyte into all of the cell core containing cavities through the gas cavity, and standing for 3-6 h; chemically synthesizing all cells; vacuuming, heat-sealing and heat-welding all un-sealed side edges of the cells, cutting the cells to obtain a plurality of mono-cells. Advantages of the combined preparation method are that: production efficiency is high, waste of aluminum plastic film is decreased, production cost is reduced, and consistency of electrochemical performance such as capacity, internal resistance and voltage of the prepared cell is good.

Description

technical field [0001] The invention relates to the manufacturing technology of lithium batteries, in particular to a combined manufacturing method of soft-packaged lithium batteries. Background technique [0002] In recent years, flexible packaging lithium batteries have been widely used in mobile digital products due to their advantages of high energy density, light weight, good safety performance, and self-defined shape. At present, the soft outer packaging film used in the vast majority of flexible packaging batteries is aluminum-plastic film, which is mainly imported from abroad, and the price is high. [0003] The traditional production method of flexible packaging lithium batteries is single battery manufacturing, that is, the production process of punching a single battery on an aluminum-plastic film, sealing and welding a single battery, injecting liquid into a single battery, and forming a single battery. On the aluminum-plastic film 41 of the battery, a certain a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/38H01M6/00H01M6/14H01M10/058
CPCY02E60/10Y02P70/50
Inventor 梁百胜蓝俊方
Owner SHENZHEN B&K TECH