A wetting method of a hard shell lithium ion battery

A lithium-ion battery, hard case technology, applied in secondary batteries, battery pack parts, non-aqueous electrolyte batteries, etc., can solve problems such as electrolyte spillage, reduce spillage, avoid electrolyte spillage, and improve infiltration efficiency Effect

Inactive Publication Date: 2019-01-18
DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for infiltration of hard-shell lithium-ion batteries, which can solve the problem that the electrolyte is easily spilled when vacuuming the lithium-ion batteries quickly

Method used

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  • A wetting method of a hard shell lithium ion battery
  • A wetting method of a hard shell lithium ion battery
  • A wetting method of a hard shell lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The infiltration method of the hard shell lithium ion battery of the present embodiment includes the following steps:

[0041] 1) After placing the open aluminum shell lithium-ion battery in the sealed chamber, evacuated the sealed chamber to -60KPa gauge pressure, and maintained the pressure for 2 minutes; then depressurized the sealed chamber to normal pressure and injected dry nitrogen to the gauge pressure is 0.2MPa, and the pressure is maintained for 2min;

[0042] 2) After step 1) is completed, the airtight chamber is depressurized to normal pressure, vacuumed again to a gauge pressure of -80KPa, and the pressure is maintained for 3 minutes; then the airtight chamber is depressurized to normal pressure and then injected into dry nitrogen to a gauge pressure of 0.4 MPa, holding pressure for 3min;

[0043] 3) After step 2) is completed, the airtight chamber is depressurized to normal pressure again, the airtight chamber is evacuated to a gauge pressure of -99KPa, a...

Embodiment 2

[0046] The infiltration method of the hard shell lithium ion battery of the present embodiment includes the following steps:

[0047] 1) After placing the open aluminum shell lithium-ion battery in the sealed chamber, vacuum the sealed chamber to a gauge pressure of -70KPa, and keep the pressure for 2 minutes; then continue to vacuum the sealed chamber to -99KPa, and keep the pressure for 2 minutes; then seal the After the cabin is depressurized to normal pressure, fill in dry nitrogen until the gauge pressure is 0.6MPa, and keep the pressure for 2min;

[0048] 2) Repeat step 1) 10 times, the infiltration process is completed, open the sealed hatch, and remove the battery for blanking.

Embodiment 3

[0050] The infiltration method of the hard shell lithium ion battery of the present embodiment includes the following steps:

[0051] 1) After placing the open aluminum shell lithium ion battery in the sealed chamber, evacuated the sealed chamber to the gauge pressure of -30KPa, and maintained the pressure for 0.2min; The pressure is 0.1MPa, and the pressure is maintained for 0.2min;

[0052] 2) After step 1) is completed, the airtight chamber is depressurized to normal pressure, evacuated again to a gauge pressure of -40KPa, and the pressure is maintained for 3 minutes; then the airtight chamber is depressurized to normal pressure and then injected into dry nitrogen to a gauge pressure of 0.2 MPa, holding pressure for 3min;

[0053] 3) After step 2) is completed, the airtight chamber is depressurized to normal pressure again, the airtight chamber is evacuated to a gauge pressure of -50KPa, and the pressure is maintained for 5min; then the airtight chamber is depressurized to...

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Abstract

The invention relates to a wetting method of a hard shell lithium ion battery, and belongs to the technical field of lithium ion battery preparation. The wetting method of the hard shell lithium ion battery comprises the following steps: 1) vacuumizing the injected hard shell lithium ion battery to a gauge pressure of-70 To -30KPa, keeping pressure, discharging vacuum; 2) carrying out circulatingstatic position according to that following method: vacuuming the hard shell lithium ion battery until the gauge pressure is less than or equal to 30KPa than the gauge pressure of the adjacent previous vacuum pumping, keeping the pressure, relieving the vacuum, injecting an inert gas to keep the pressure, relieving the pressure. The wetting method of the present invention, By controlling the gaugepressure in the hard-shell cell after electrolyte injection, At that initial stage, the electrolyte can be avoid from overflowing when there is much overflow gas in the cell, and the gauge pressure of the vacuum can be reduced with the decrease of the overflowing gas in the circulate static process, the wetting process is accelerated and the electrolyte cannot be overflowed, the wetting efficiency is improved, and the overflowing of the electrolyte is greatly reduced at the same time.

Description

technical field [0001] The invention relates to an infiltration method for a hard-shell lithium ion battery, and belongs to the technical field of lithium ion battery preparation. Background technique [0002] The square aluminum shell lithium-ion battery has the advantages of high platform voltage, high energy density, many cycles, long storage time, small size and weight, and high charging efficiency, and has been widely used in the field of new energy vehicles. [0003] In the production and manufacture of square aluminum-shell lithium-ion batteries, it is a very important process to stand after injection. In order to make the electrolyte fully infiltrate the positive and negative materials of the battery and the battery separator, the battery needs to consume a long time after the electrolyte is injected. time to complete the infiltration of the electrolyte inside the battery. When the electrolyte fully infiltrates the positive and negative electrode materials and the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M2/36H01M10/0525H01M50/60
CPCH01M10/0525H01M10/058H01M50/668Y02E60/10Y02P70/50
Inventor 赵永锋雷华旺许飞李云峰马红涛尼亚琼李杰武艳勇刘振东孙高霖
Owner DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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