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Sealing assembly and battery negative pressure formation and secondary liquid supplementing method

A technology for sealing components and batteries, which is applied to battery components, circuits, electrical components, etc., and can solve problems such as polluting the environment, small size of sealing nails, and affecting battery performance

Pending Publication Date: 2021-09-14
SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size of the sealing nail, it is difficult to hold the mechanical fixture, and the precision of the equipment is high. In addition, during the plugging and unplugging process, the air in the environment is easy to enter the inside of the battery, which affects the electrolyte reaction and battery performance. The liquid vapor is also easy to overflow with the insertion and removal of the sealing nail, polluting the environment

Method used

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  • Sealing assembly and battery negative pressure formation and secondary liquid supplementing method
  • Sealing assembly and battery negative pressure formation and secondary liquid supplementing method
  • Sealing assembly and battery negative pressure formation and secondary liquid supplementing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as Figure 1-Figure 5 As shown, this embodiment provides a sealing assembly for the formation and liquid replenishment process of the battery 100. The upper cover 101 of the battery 100 is provided with a liquid injection hole 1011 that is wide at the top and narrow at the bottom. The sealing assembly includes a sealing nail cylinder 1 And the external pipeline 2, the sealing nail cylinder 1 is made of silica gel or rubber, the sealing nail cylinder 1 can be inserted into the liquid injection hole 1011 and can shrink and deform under the action of the inner wall of the liquid injection hole 1011, wide at the top and narrow at the bottom The liquid injection hole 1011 is convenient to squeeze the sealing nail cylinder 1 to close the through hole 11 left by the external pipeline 2 on the sealing nail cylinder 1; the lower end of the external pipeline 2 can be inserted into the sealing nail cylinder 1 and extend into In the battery 100 , the upper end of the external ...

Embodiment 2

[0083] Such as Figure 6 As shown, this embodiment provides a sealing assembly, which differs from the sealing assembly provided in Embodiment 1 in that:

[0084] In the sealing assembly provided in this embodiment, the number of external pipelines 2 is multiple, and the multiple external pipelines 2 include a vacuum tube 24 and a liquid injection tube 25. The vacuum tube 24 and the liquid injection tube 25 are arranged side by side and can be inserted and sealed. The nail cylinder 1 extends into the battery 100, the upper end of the vacuum tube 24 is used to communicate with the vacuum pump, and the upper end of the liquid injection tube 25 is used to communicate with the pressurizing equipment.

[0085] Optionally, the vacuum tube 24 and the liquid injection tube 25 are arranged side by side and fixedly connected, so as to insert both into the sealing nail cylinder 1 at the same time.

[0086] Optionally, the upper end of the vacuum tube 24 is provided with a vacuum pump co...

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Abstract

The invention relates to the technical field of battery liquid injection sealing, in particular to a sealing assembly and a battery negative pressure formation and secondary liquid supplementing method. The sealing assembly is used for the battery formation and liquid supplementing process, a liquid injection hole with the wide upper portion and the narrow lower portion is formed in an upper cover of a battery, the sealing assembly comprises a sealing nail column body and an external pipeline, and the sealing nail column body is made of silica gel or rubber, can be plugged into the liquid injection hole and can contract and deform under the action of the inner wall of the liquid injection hole; through the liquid injection hole, it is convenient to extrude the sealing nail column body so as to seal a through hole, left on the sealing nail column body, of the external pipeline; the lower end of the external pipeline can be inserted into the sealing nail column body and extends into the battery, and the upper end of the external pipeline can be communicated with a vacuum pump or pressurizing equipment, so that the battery is in a negative pressure state or the battery is filled with electrolyte. According to the battery negative pressure formation and secondary liquid supplementing method, by applying the sealing assembly, the problems that air enters the battery, electrolyte steam overflows and the like can be avoided, the cost is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of battery liquid injection sealing, in particular to a sealing assembly and a battery negative pressure formation and secondary liquid replenishment method. Background technique [0002] In order to form an effective solid electrolyte interface film (solid electrolyte interface, referred to as SEI film) on the negative electrode of the battery, the battery needs to be formed. After the formation, due to factors such as electrolyte reaction and outflow, the amount of electrolyte in the battery is likely to be insufficient. Process requirements require secondary rehydration. Lithium batteries are generally sealed with sealing nails and then left to stand at high temperature. During the standing process, the battery will also produce gas, which will cause the battery to bulge and affect the product quality. Therefore, the battery needs to be in a negative pressure environment all the time. [0003] The tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/645H01M50/609
CPCH01M50/645H01M50/609Y02E60/10
Inventor 李峥冯玉川李胜前陈凯何泓材
Owner SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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