Lithium battery liquid injection system and lithium battery liquid injection method

A liquid injection and liquid injection technology for lithium batteries, which is applied in the manufacture of battery pack components, non-aqueous electrolyte batteries, and electrolyte batteries, etc., can solve the problems of low capacity, time-consuming, short life, etc., and achieve efficient liquid injection , prolong the service life and improve the safety performance

Pending Publication Date: 2019-05-28
江西力能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the production process of lithium batteries, electrolyte needs to be injected through the liquid injection holes opened on it. It takes a certain amount of time to inject liquid into lithium batteries, and the existing liquid injection method generally uses liquid injection first. After vacuuming, this method of liquid injection battery cells has certain defects, such as low capacity and short life

Method used

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  • Lithium battery liquid injection system and lithium battery liquid injection method
  • Lithium battery liquid injection system and lithium battery liquid injection method
  • Lithium battery liquid injection system and lithium battery liquid injection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like figure 1 , 2 As shown, a lithium battery liquid injection system includes a conveyor and a work frame 16 for fixing the conveyor. The system also includes a liquid injection device 100, a charging device 300, and a vacuum device 200. The conveying of the conveyor Trays 12 are placed at intervals on the belt 1; a number of battery cells 13 are placed on the tray 12;

[0047] like image 3 , 4 As shown, the liquid injection device 100 includes a liquid injection frame 9, and a moving mechanism is fixed below the liquid injection frame 9 through a connecting block 901. The moving mechanism includes a moving screw 902, and one end of the moving screw 902 is connected to a motor 903. The mobile screw rod 902 is threadedly connected with a moving frame 10, and the moving frame 10 is connected with several liquid injection heads 11, and the liquid injection heads 11 are connected to the liquid injection pump through a hose, and the inlet end of the liquid injection pum...

Embodiment 2

[0058] like Figure 8 Shown, a kind of liquid injection method of lithium battery comprises the following steps:

[0059] S0: Equipped with the lithium battery liquid injection system of Embodiment 1, the specific implementation is not limited to the liquid injection system of Embodiment 1;

[0060] S1: one-time liquid injection: place the battery cell 13 in the tray, use the liquid injection device 100, and start injecting liquid into the battery cell 13, and the liquid injection volume is 15% of the capacity of the battery cell;

[0061] S2: One-time vacuuming: start the conveyor, transport the battery cell 13 after the first liquid injection to the position corresponding to the vacuuming device 200, start the vacuum pump, and perform one-time vacuuming. The vacuum pressure value is -20Kpa, and keep for 30s;

[0062] S3: Secondary liquid injection: the conveyor continues to transfer the battery cell after the primary vacuum to the liquid injection device 100 for secondary l...

Embodiment 3

[0076] like Figure 8 Shown, a kind of liquid injection method of lithium battery comprises the following steps:

[0077] S1: One-time liquid injection: place the battery cell in the tray, use the liquid injection device, and start injecting liquid into the battery cell 13 with the liquid injection head 11, and the liquid injection volume is 15% of the capacity of the battery cell;

[0078] S2: One-time vacuuming: start the conveyor, transport the battery cell 13 after the first liquid injection to the position corresponding to the vacuuming device 200, start the vacuum pump, and perform one-time vacuuming, the vacuum pressure value is -25Kpa, and keep for 40s;

[0079] S3: secondary liquid injection: the conveyor continues to transfer the battery cells 13 after primary vacuuming to the liquid injection device, and the liquid injection head 11 performs secondary liquid injection, and the liquid injection volume is 20% of the capacity of the battery cells;

[0080] S4: Seconda...

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Abstract

The invention discloses a lithium battery liquid injection system and a lithium battery liquid injection method. The lithium battery liquid injection system comprises a conveyor and a working frame for fixing the conveyor, the system also comprises a liquid injection device, a charging device and a vacuumizing device, and trays are arranged on a conveyor belt of the conveyor at intervals; and a plurality of battery cells are placed on each tray. According to the liquid injection method of the system, reasonable liquid injection and vacuumizing times are adopted, and after the charging procedure is added, the chemical electrolyte reacts in advance, so that gas in the battery is effectively discharged, the internal pressure of the battery is reduced, the battery is safer, the battery capacity is increased, the circulating charging and discharging times are increased, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of battery processing, in particular to a lithium battery liquid injection system and a liquid injection method. Background technique [0002] With the development of modern society, the application of lithium batteries is becoming more and more extensive. During the production process of lithium batteries, electrolyte needs to be injected through the liquid injection holes opened on it. It takes a certain amount of time to inject liquid into lithium batteries, and the existing liquid injection method generally uses liquid injection first. After vacuuming, the liquid-injected battery cells in this method have certain defects, such as low capacity and short life. Therefore, it is urgent to design a new liquid injection method and liquid injection system. Contents of the invention [0003] In order to solve the above existing problems, the present invention discloses a lithium battery liquid injection syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M10/058H01M10/44H01M50/609
CPCY02E60/10Y02P70/50
Inventor 侯伟侯民郭农庆
Owner 江西力能新能源科技有限公司
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