Method for manufacturing lithium ion battery

A technology of lithium-ion batteries and manufacturing methods, which is applied in the direction of electrolyte battery manufacturing, secondary batteries, and battery pack parts, etc., which can solve the problems of wasting packaging bag materials, aluminum-plastic composite film packaging materials, damaging battery performance, and general low-vacuum pumping. Gas heat sealing equipment and other issues, to achieve the effect of simple process flow and improved manufacturing process

Inactive Publication Date: 2009-09-16
林道勇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this manufacturing method: First, the aluminum-plastic composite film used as the airbag needs to be cut off and treated as waste, which wastes the expensive aluminum-plastic composite film; seal, high equipment cost, low versatility
This method is cumbersome to operate, it is difficult to ensure uniform pressure, and some gas will stay inside the battery during formation
[0008] Therefore, using traditional methods to manufacture soft-pack lithium-...

Method used

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  • Method for manufacturing lithium ion battery
  • Method for manufacturing lithium ion battery
  • Method for manufacturing lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as image 3 Shown, the embodiment one of the manufacturing method of the lithium-ion battery provided by the present invention comprises the following steps:

[0045] Step 301: Preheat sealing of the packaging bag: put the battery core into the packaging bag, heat seal the other heat-sealed sides of the packaging bag tightly, and then place the opening of one end of a hollow tube in the heat-sealed side of the packaging bag , the other end opening is placed outside the packaging bag, a metal wire is built into the hollow tube when heat sealing, and the metal wire can be removed after sealing, so that the packaging bag only communicates with the outside world through the hollow tube;

[0046] Step 302: Vacuuming: Connect the hollow tube to the exhaust pipe of the vacuum equipment, and vacuumize the packaging bag. When the vacuum degree in the packaging bag meets the requirements of the lithium-ion battery manufacturing process, clamp the hollow tube and disconnect i...

Embodiment 2

[0053] Such as Figure 4 As shown, this embodiment is the same as other steps of the method described in the above-mentioned embodiment 1, the difference is:

[0054] Step 401: During the pre-heat sealing process, in addition to communicating with the outside world through the hollow tube, a heat-sealed side is also reserved as a liquid injection side or a liquid injection hole is reserved on a heat-sealed side for liquid injection ;

[0055] Step 402: Vacuuming: Seal the hollow tube with a rubber cap, and then connect the vacuuming device to the packaging bag through the reserved liquid injection edge or liquid injection hole to perform vacuuming;

[0056] Step 403 is: filling dry gas, and then completing the liquid injection process through the reserved liquid injection edge or the liquid injection through hole, and heat sealing the liquid injection edge or the liquid injection through hole after the liquid injection is completed.

[0057] Step 405: Open the rubber cap of ...

Embodiment 3

[0059] Such as Figure 5 , Image 6 As shown, this embodiment is the same as the other steps of the method described in the above-mentioned embodiment 1 or embodiment 2, the difference is that in the formation step, the battery is formed and vacuum is applied at the same time, so that the residual in the battery can be removed during the formation. The gas and the newly generated gas during the formation process are discharged to realize the formation in a vacuum state. When the battery is formed, the pressure is uniform, and the residual gas in the battery or the gas generated by the formation is effectively prevented from accumulating in the battery, thereby achieving the effect of improving battery performance.

[0060] The manufacturing method of the above-mentioned lithium-ion battery is applicable to the production of soft-packed lithium-ion batteries of various capacities, shapes and sizes. The process is simple and the equipment cost is low, which can effectively save...

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PUM

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Abstract

The invention relates to a method for manufacturing lithium ion battery, which includes steps of packaging at least one hollow pipe on a package bag of a battery, and vacuumizing the battery through the hollow pipe. The invention also provides a package bag for the lithium ion battery, wherein the hollow pipe is arranged at side edge of the package bag for vacuumizing in battery manufacturing process. The invention can be used to manufacture flexible package lithium ion battery with different sizes, shapes and capacities, has simple process and production equipment, and is favorable to improve battery performance.

Description

technical field [0001] The invention relates to a manufacturing method of a lithium-ion battery, in particular to a manufacturing method of a soft-packed lithium-ion battery. Background technique [0002] Since the successful development of lithium-ion batteries in the 1990s, due to their unique advantages such as high energy, long cycle life, high working voltage, and no pollution, they have been widely used in mobile phones, digital cameras, notebook computers and other electronic devices. Electrical appliances, and gradually expand applications to electric bicycles, electric vehicles, backup power and other fields. Lithium-ion batteries can be divided into two types according to the packaging form of the battery case, one is hard-packed lithium-ion batteries, usually packaged in steel or aluminum shells; the other is soft-packaged lithium-ion batteries, usually packaged in soft aluminum-plastic composite films Packaging is also divided into two types: liquid flexible pac...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M2/02H01M50/105H01M50/119H01M50/121H01M50/129H01M50/627
CPCY02E60/122H01M2/36H01M10/0525H01M10/058H01M2/0267H01M2/0275Y02E60/10Y02P70/50H01M50/121H01M50/627H01M50/129H01M50/119
Inventor 林道勇
Owner 林道勇
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