Packaging method of soft-package lithium ion battery

A technology of lithium ion battery and packaging method, which is applied in non-aqueous electrolyte storage battery, electrolyte storage battery manufacturing, sustainable manufacturing/processing and other directions, can solve problems such as deviation of electrolyte extraction amount, deviation of electrolyte holding amount, and pollution of battery, etc. Improves consistency, reduces drawout, and reduces contamination and corrosion effects

Active Publication Date: 2010-12-22
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of packaging method is easy to cause the electrolyte to be drawn out and flow out naturally, and the amount of electrolyte extracted from different batteries has a large deviation, which will not only cause the ele...

Method used

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  • Packaging method of soft-package lithium ion battery
  • Packaging method of soft-package lithium ion battery
  • Packaging method of soft-package lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, place the battery to be packaged between the front clamp 5 and the rear clamp 6 of the battery fixing fixture 1 with the air bag 8 facing upwards. The angle between the battery body 7 and the horizontal plane is 90 degrees, and the air bag 8 and the battery body 7 The connection part of the battery is always higher than the battery body 7; then, the battery fixing fixture 1 and the battery to be packaged are sent into the vacuum chamber 3 together, the air bag 8 is pierced with the bayonet 2, and the vacuum chamber 3 is evacuated in a vacuum pumping manner , to reach a vacuum degree of -90KPa; finally, the battery is thermally sealed with the heat sealing jig 4, thereby completing the exhaust packaging process of the battery to be packaged.

[0023] By weighing the weight of the battery before and after venting packaging, the electrolyte extraction amount can be calculated, that is, the electrolyte extraction amount = the weight of the battery before venting packa...

Embodiment 2

[0025] The steps of exhausting the battery to be packaged in this embodiment are basically the same as those in Example 1, the only difference being that when the battery to be packaged is fixed between the front clamp 5 and the rear clamp 6, the angle between the battery body 7 and the horizontal plane is 45 degrees, The air bag 8 is at the higher end of the battery body 7 . Moreover, the vacuuming of the vacuum chamber 3 is carried out in three incremental steps, and the vacuum degrees achieved three times are respectively -10Kpa to -40Kpa, -40Kpa to -70Kpa and -70Kpa to -101.325Kpa.

[0026] According to the method of this embodiment, the packaging of 30 batteries to be packaged is completed, and the data of the amount of electrolyte extracted is calculated and recorded. Example 3

Embodiment 3

[0027] The steps of degassing and packaging the battery to be packaged in this embodiment are basically the same as those in Embodiment 1, the only difference being that the vacuuming of the vacuum chamber 3 is carried out in three incremental steps, and the degree of vacuum achieved three times is from -30Kpa to - 40Kpa, -60Kpa to -70Kpa and -80Kpa to -90Kpa.

[0028] According to the method of this embodiment, the packaging of 30 batteries to be packaged is completed, and the data of the amount of electrolyte extracted is calculated and recorded. comparative example

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Abstract

The invention discloses a packaging method of a soft-package lithium ion battery, comprising the following steps: fixing a battery to be packaged; piercing an air bag of the battery to be packaged, and vacuumizing the air bag; and packaging the battery to be packaged, wherein, a joint part between the air bag of the battery to be packaged and a main body of the battery is always higher than the main body of the battery. By adopting the packaging method of soft-package lithium ion battery for packaging the battery, the joint part between the air bag of the battery to be packaged and the main body of the battery is always higher than the main body of the battery, so electrolyte returns to the main body of the battery and is not easily extracted in vacuum, thus effectively avoiding an external packaging material of the battery from being polluted and corroded by the electrolyte, and obviously improving consistency of battery performance.

Description

technical field [0001] The invention relates to a battery packaging method, in particular to a soft-pack lithium-ion battery packaging method capable of improving battery performance consistency. Background technique [0002] Lithium-ion batteries have developed rapidly in just over ten years since they were developed in the 1990s. Soft-pack lithium-ion batteries have the advantages of higher energy density and better cycle life, so they are favored. [0003] At present, the exhaust packaging process after the formation of soft-pack lithium-ion batteries generally adopts the method of fixing the battery horizontally, and then piercing, pumping, and packaging it. However, this kind of packaging method is easy to cause the electrolyte to be drawn out and flow out naturally, and the amount of electrolyte extracted from different batteries has a large deviation, which will not only cause the electrolyte to pollute the packaging materials on the outer surface of the battery, but...

Claims

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Application Information

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IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张正德邓勇强王国强朱建华吴翔
Owner DONGGUAN AMPEREX TECH
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