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Method and apparatus for battery vacuum sealing

A vacuum sealing and battery technology, which is applied to secondary batteries, battery pack components, battery boxes/jackets, etc., can solve problems such as affecting the capacity of the battery cells, poor appearance of the battery shell, and wetting, etc., and achieves low cost and implementation. easy effect

Inactive Publication Date: 2005-12-07
广东风华新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the flattening of the cell basically uses a mold to shape the cell after the opening is formed. Although this method can discharge the gas in the cell to a certain extent, there will still be more gas left in the cell. As a result, the electrolyte is blocked by the gas between the pole pieces and it is difficult to fully and comprehensively wet the pole pieces, so that the pole pieces at the air bubbles cannot be activated well. In the process of charging and discharging in the future, it is easy to produce lithium precipitation, which will affect the capacity of the battery cell; in addition, the method of adding a mold to a pneumatic cylinder is often used when the battery cell is flattened and sealed, which is more affected by the precision of the mold and human factors. The consistency of core thickness is difficult to achieve, and it is easy to cause poor appearance of the battery case

Method used

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  • Method and apparatus for battery vacuum sealing

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Effect test

Embodiment 1

[0019] like figure 1 A vacuum sealing method for a circular battery and an embodiment of the sealing device thereof are shown, the vacuum sealing device includes a vacuum chamber 1, a concave clamp 3 for holding the battery 2, and a stainless steel ball for sealing the liquid injection hole (not shown in detail) 4. The surface of the stainless steel ball 4 is smooth, and the diameter is slightly larger than the liquid injection hole, and the vacuum chamber 1 is also equipped with a cylinder press 5, and the wall of the vacuum chamber 1 is provided with a gas pipe 6 that passes through the press 5. Dense hole 1-0, air release port 1-1 and air extraction port 1-2; air pipe 6 is connected with foot switch 7 for controlling air flow, and pressure rod 5-1 of press machine 5 passes through rigid plate body 8 to cover vertically. 4 on a plurality of stainless steel balls. The female clamp 3 comprises a bottom surface 3-0 and three clamping sides 3-1, 3-2, 3-3. The concave fixture 3...

Embodiment 2

[0022] like figure 1 The sealing device embodiment solution shown can also be used for vacuum sealing of rectangular batteries, and its specific structure and schematic diagram can be fully referred to as figure 1 The vacuum sealing device shown is Embodiment 1, and will not be described again here.

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Abstract

This invention refers to a cell vacuum seal method and device thereof, which contains 1, fixing upward the liquid filling hole in concave clamp after cell being charged, 2, putting curve surface block having diameter greater than that of liquid filling hole on the hole, 3, vertically connecting the press lever to curve surface block, 4, vacuumizing cell, concave clamp and press in vacuum chamber, 5, when reaching special vacuum degree, closing liquid filling hole by acting press lever down to press the curve surface block, 6, relieving the vacuum state of vacuum state to obtain the gas discharged and sealed cell. Said invention can reduce gas in cell core, raise cell size concordance ratio and cell capacity.

Description

【Technical field】 [0001] The present invention relates to an ion battery, more specifically, the present invention relates to an ion battery and its sealing process and device. 【Background technique】 [0002] Ion batteries, represented by lithium-ion batteries, are increasingly becoming important and indispensable power accessories for communication products such as mobile phones, mobile DVDs, and handheld computers. The core of lithium batteries is the battery cell, which is composed of electrodes, electrolytes, etc. It is composed of a shell and a cover plate to shape and protect the outside. [0003] At present, lithium batteries on the market generally adopt a rectangular structure, and the shell is generally flat, and the shell material is generally stainless steel or aluminum. The development trend of lithium batteries is rectangular aluminum shell lithium batteries. However, in the production process of aluminum shell lithium batteries, no matter whether the opening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38H01M50/103H01M50/107H01M50/183
CPCY02E60/10Y02P70/50
Inventor 冼可枝曹伟建王建明韩建国广开能
Owner 广东风华新能源股份有限公司