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Electrolyte immersion method of soft package lithium ion battery

A technology of ion battery and electrolyte, applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, sustainable manufacturing/processing, etc., can solve the problems of not suitable for large-scale application, complicated operation steps, high equipment requirements, etc., and shorten the soaking time , strong operability and simple steps

Active Publication Date: 2017-12-12
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation steps of this infiltration method are complicated, require high equipment, are not easy to operate, and have high energy consumption, so it is not suitable for large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Put the soft-packed cell to be injected into the clamp between the two splints, vacuumize and inject the required amount of electrolyte, the clamping pressure of the splint is 0.05MPa, and the vacuum degree of the first vacuum is -0.085Mpa;

[0024] (2) Leave the pouch cell at 20°C for 6 hours;

[0025] (3) Roll the front and back of the soft-packed battery to drive the gas to the airbag side, and cut the opening on the airbag side to exhaust. The rolling pressure is controlled at 0.1MPa, and the front and back of the soft-packed battery are rolled once;

[0026] (4) Put the soft-packed battery cell between the two splints to clamp and fix it, and then vacuumize the battery cell for the second time, then fill it with dry air and keep the pressure, and then vacuumize the battery cell for the second time and carry out Sealing, the clamping pressure of the splint is 0.15Mpa, the vacuum degree of the second vacuuming and the third vacuuming are both -0.085Mpa, the pres...

Embodiment 2

[0029] (1) Put the soft-packed cell to be injected between the two splints and clamp and fix it, vacuumize and inject the required amount of electrolyte, the clamping pressure of the splint is 0.07MPa, and the vacuum degree of the first vacuum is -0.095Mpa;

[0030] (2) Leave the pouch cell at 25°C for 3 hours;

[0031] (3) Roll the front and back of the soft-packed battery to drive the gas to the side of the airbag, and cut the opening on the side of the airbag to exhaust. The rolling pressure is controlled at 0.2MPa, and the front and back of the soft-packed battery are rolled once;

[0032] (4) Put the soft-packed battery cell between the two splints to clamp and fix it, and then vacuumize the battery cell for the second time, then fill it with dry air and keep the pressure, and then vacuumize the battery cell for the second time and carry out Sealing, the clamping pressure of the splint is 0.2Mpa, the vacuum degree of the second vacuuming and the third vacuuming are both ...

Embodiment 3

[0035] (1) Put the soft-packed cell to be injected into the clamp between the two splints, vacuumize and inject the required amount of electrolyte, the clamping pressure of the splint is 0.06MPa, and the vacuum degree of the first vacuum is -0.09Mpa;

[0036] (2) Leave the pouch cell at 23°C for 5 hours;

[0037] (3) Roll the front and back of the soft-packed battery to drive the gas to the side of the airbag, and cut the opening on the side of the airbag to exhaust. The rolling pressure is controlled at 0.15MPa, and the front and back of the soft-packed battery are rolled once;

[0038] (4) Put the soft-packed battery cell between the two splints to clamp and fix it, and then vacuumize the battery cell for the second time, then fill it with dry air and keep the pressure, and then vacuumize the battery cell for the second time and carry out Sealing, the clamping pressure of the splint is 0.17Mpa, the vacuum degree of the second vacuuming and the third vacuuming are both -0.09...

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PUM

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Abstract

The invention discloses an electrolyte immersion method of a soft package lithium ion battery. By various steps of clamping, liquid injection, first vacuum pumping, standing, rolling, gas discharging, clamping, second vacuum pumping, air inflation, pressure maintaining, third vacuum pumping, sealing and standing, the electrolyte immersion time is greatly shortened, rapid immersion of a battery cell (particularly a high-pressure density pole plate) of a soft lithium ion battery is achieved, the influence of a high temperature on a part of electrolyte constituents is eliminated, the electrolyte immersion method is simple in step and high in maneuverability, the production efficiency is improved as well as the production energy consumption is reduced, and the electrolyte immersion method is suitable for industrial application.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery preparation, in particular to an electrolyte infiltration method for a soft-packed lithium-ion battery. Background technique [0002] In the production process of the existing soft-packed batteries, the normal pressure liquid injection sealing method is mainly adopted, and the long-term normal temperature and high temperature infiltration method is often used after the liquid injection to achieve the infiltration effect of the electrolyte. [0003] Among them, the step of soaking at room temperature is: after the cell is injected with liquid, the electrolyte is allowed to penetrate into the inside of the cell by standing at 23°C to 28°C for 40 to 48 hours, and then pre-charged to make the electrolyte soak into the inside of the pole piece coating . The steps of high-temperature soaking are: after the cell is injected with liquid, the electrolyte is allowed to penetrate into the inside...

Claims

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Application Information

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IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 单海鹏李明李凡群
Owner WANXIANG 123 CO LTD
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