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A kind of impregnation method of high-pressure negative electrode power battery

A power battery, high-pressure compaction technology, applied in battery electrodes, secondary battery manufacturing, circuits, etc., can solve the problems of high liquid loss of batteries, low-porosity negative electrode sheet infiltration difficulties, etc., to improve battery life and calendar life The effect of enhancing and avoiding the phenomenon of lithium precipitation

Active Publication Date: 2017-05-17
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects that the low-porosity negative electrode sheet is generally difficult to infiltrate and the liquid loss of the battery cell is high due to the room temperature infiltration method of the current power battery, the present invention provides a method for infiltration of a high-pressure negative electrode power battery

Method used

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  • A kind of impregnation method of high-pressure negative electrode power battery
  • A kind of impregnation method of high-pressure negative electrode power battery

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The flow chart of infiltration method of the present invention sees figure 1 ,Specific steps are as follows:

[0025] A. Vacuum shelving: Place the battery cell that has just been injected with electrolyte but has not been sealed once in a vacuum box. The battery cell is placed at an angle of 60-90 degrees. Time 10 minutes to 15 minutes;

[0026] B. Shelving at high temperature: Aging the battery core after vacuum shelving and sealing once at a temperature of 33°C-38°C, placing the battery cell at an angle of 30-60 degrees, with the air bag of the battery cell upward, and the shelf time is 10 hours to 12 hours;

[0027] C. Degassing: Take out the battery cell after high temperature storage, and perform air extraction and edge sealing on the vacuum pumping equipment. The vacuum degree is -0.092MPa, and the pumping time is 2 seconds to reduce the internal pressure of the cell The liquid loss of the cell after gas is 0.2g~0.8g, while the liquid loss of the normal temper...

Embodiment 2

[0034] The flow chart of infiltration method of the present invention sees figure 1 ,Specific steps are as follows:

[0035] A. Vacuum shelving: Place the battery cell that has just been injected with electrolyte but has not been sealed once in a vacuum box. The battery cell is placed at an angle of 60-90 degrees. Time 10 minutes to 15 minutes;

[0036] B. Shelving at high temperature: Aging the battery core after vacuum shelving and sealing once at a temperature of 33°C-38°C, placing the battery cell at an angle of 30-60 degrees, with the air bag of the battery cell upward, and the shelf time is 10 hours;

[0037] C. Degassing: Take out the battery cell after high temperature storage, and perform air extraction and edge sealing on the vacuum pumping equipment. The vacuum degree is -0.092MPa, and the pumping time is 2 seconds to reduce the internal pressure of the cell The liquid loss of the cell after gas is 0.2g, while the liquid loss of the normal temperature immersion me...

Embodiment 3

[0044] The flow chart of infiltration method of the present invention sees figure 1 ,Specific steps are as follows:

[0045] A. Vacuum shelving: Place the battery cell that has just been injected with electrolyte but has not been sealed once in a vacuum box. The battery cell is placed at an angle of 60-90 degrees. Time 10 minutes to 15 minutes;

[0046] B. Shelving at high temperature: Aging the batteries after vacuum shelving and sealing once at a temperature of 33°C-38°C, placing the batteries at an angle of 30-60 degrees, with the airbag of the batteries facing upwards, and placing them for 12 hours;

[0047] C. Degassing: Take out the battery cell after high temperature storage, and perform air extraction and edge sealing on the vacuum pumping equipment. The vacuum degree is -0.092MPa, and the pumping time is 2 seconds to reduce the internal pressure of the cell The liquid loss of the cell after gas is 0.8g, while the liquid loss of the normal temperature immersion metho...

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Abstract

The invention provides a method for soaking a high-pressure negative electrode power battery. The method comprises the following steps: A. Vacuum shelving: place the battery core that has just been injected with electrolyte but has not been sealed once in a vacuum box, and the battery core is 60- Placed at an angle of 90 degrees, the vacuum degree of the vacuum box is controlled at -0.085MPa~-0.09MPa, and the shelf time is 10 minutes to 15 minutes; B, high temperature shelf; C, degassing; D, rolling; E, secondary high temperature shelf; F. Pre-charging: On the charging device, use 0.007C, 0.01C, 0.1C, and 0.2C to pre-charge the batteries after step E. The charging upper limit voltages are 3.17V, 3.17V, and 3.17V respectively. , 3.47V, the charging time is 50 minutes, 70 minutes, 120 minutes, and 300 minutes respectively; G, degassing; H, secondary rolling: the battery cell after the completion of step G is subjected to secondary rolling according to step D After pressing, the impregnation process of the high-pressure negative electrode power battery is completed. The method makes it easy to infiltrate the low-porosity negative electrode sheet generally, and the liquid loss of the electric core is low.

Description

technical field [0001] The invention relates to a method for preparing a battery, in particular to an infiltration method for a high-pressure negative electrode power battery. Background technique [0002] At present, the infiltration method of the power battery includes the following steps: 1. Infiltration at room temperature: After the cell is injected with liquid, it is left at 23°C to 28°C for 40 to 48 hours to allow the electrolyte to penetrate into the cell, and then through pre-charging, Make the electrolyte infiltrate the inside of the pole piece coating; 2. High temperature infiltration: After the cell is injected, it is left at 33°C to 38°C for 30 hours to 38 hours, so that the electrolyte penetrates into the inside of the cell, and then pre-charged , so that the electrolyte infiltrates the inside of the pole piece coating. [0003] Such as the application number: 201210581823.9 application date: 2012-12-27, a Chinese invention discloses a diaphragm infiltration m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04
CPCH01M4/04H01M4/139H01M10/04Y02E60/10Y02P70/50
Inventor 李凡群苏文俊谭歌朱修锋高新宝陈军
Owner WANXIANG 123 CO LTD
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