Formation and aging combined method of soft package lithium ion battery and soft package lithium ion battery

A technology of ion battery and lithium ion, which is applied in the direction of secondary battery charging/discharging, secondary battery, electrochemical generator, etc., and can solve the problems affecting the cycle performance and long process of lithium ion battery

Active Publication Date: 2020-12-15
上海大学浙江嘉兴新兴产业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a combination method of formation and aging of a soft-packed lithium-ion battery and a soft-packed lithium-ion battery to solve or partially solve the long process of the existing formation method using small current charging, which affects the cycle of the lithium-ion battery performance technical issues

Method used

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  • Formation and aging combined method of soft package lithium ion battery and soft package lithium ion battery
  • Formation and aging combined method of soft package lithium ion battery and soft package lithium ion battery
  • Formation and aging combined method of soft package lithium ion battery and soft package lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Place the battery in the formation-aging integrated device to perform formation according to the following three stages of formation:

[0065] (1) Set the fixture temperature to 20°C and the fixture pressure to 0.05MPa. After the temperature and pressure reach the set value, let it stand for 5 minutes, and then charge it to 3.45V with a constant current of 0.05C;

[0066] (2) Set the temperature of the fixture to 30°C, the pressure of the fixture to 0.2MPa, raise the temperature, increase the pressure, let the temperature and pressure reach the set value, let it stand for 5 minutes, and then charge it with a constant current of 0.1C to 3.8V;

[0067] (3) Set the temperature of the fixture to 40°C, the pressure of the fixture to 0.4MPa, raise the temperature, increase the pressure, let the temperature and pressure reach the set value and let it stand for 5 minutes, and then charge it to 3.95V with a constant current of 0.2C;

[0068] The aging steps are as follows:

[0...

Embodiment 2

[0074] Place the battery in the formation-aging integrated device to perform formation in the following three stages:

[0075] (1) Set the fixture temperature to 20°C and the fixture pressure to 0.1MPa. After the temperature and pressure reach the set value, let it stand for 5 minutes, and then charge it to 3.25V with a constant current of 0.05C;

[0076] (2) Set the temperature of the fixture to 30°C, the pressure of the fixture to 0.3MPa, raise the temperature, increase the pressure, let the temperature and pressure reach the set value and let it stand for 5 minutes, and then charge it to 3.65V with a constant current of 0.1C;

[0077] (3) Set the temperature of the fixture to 40°C, the pressure of the fixture to 0.7MPa, raise the temperature and increase the pressure, let the temperature and pressure reach the set value and let it stand for 5 minutes, then charge it with a constant current of 0.2C to 3.95V;

[0078] The aging steps are as follows:

[0079] (1) Set the fixt...

Embodiment 3

[0084] Place the battery in the formation-aging integrated device to perform formation in the following three stages:

[0085] (1) Set the fixture temperature to 25°C and the fixture pressure to 0.05MPa. After the temperature and pressure reach the set value, let it stand for 5 minutes, and then charge it to 3.45V with a constant current of 0.05C;

[0086] (2) Set the fixture temperature to 35°C, the fixture pressure to 0.2MPa, raise the temperature and increase the pressure, let the temperature and pressure reach the set value and let it stand for 5 minutes, then charge it with a constant current of 0.1C to 3.8V;

[0087] (3) Set the temperature of the fixture to 45°C, the pressure of the fixture to 0.4MPa, raise the temperature and increase the pressure, let the temperature and pressure reach the set value and let it stand for 5 minutes, then charge it to 4.1V with a constant current of 0.2C;

[0088] The aging steps are as follows:

[0089] (1) Set the fixture temperature ...

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Abstract

The invention discloses a formation and aging combined method of a soft package lithium ion battery, which comprises the following steps: carrying out sectional formation on a soft package lithium ionbattery cell to be formed to obtain a formed soft package lithium ion battery cell, and carrying out constant-current charging to a first cut-off voltage according to a first formation temperature A1of 20-25 DEG C and a first formation pressure B1 of 0.05-0.15 MPa; performing constant-current charging to a second cut-off voltage according to a second formation temperature A2 of 26-35 DEG C and asecond formation pressure B2 of 0.16-0.30 MPa; performing constant-current charging to a third cut-off voltage according to a third formation temperature A3 of 36-45 DEG C and a third formation pressure B3 of 0.30-0.70 MPa; carrying out sectional aging on the formed soft package lithium ion battery cell, wherein the first aging temperature D1 is 25-30 DEG C and a first aging pressure E1 is 0.2-0.4 MPa; the second aging temperature D2 is 31-40 DEG C, and the second aging pressure E2 is 0.4-0.6 MPa; the third aging temperature D3 is 41-45 DEG C, and the third aging pressure E3 is 0.6-1.0 MPa; according to the method, the integrity of the SEI film and the cycle performance of the battery can be improved.

Description

technical field [0001] The present application relates to the technical field of soft-pack lithium-ion batteries, in particular to a combination method of formation and aging of soft-pack lithium-ion batteries and soft-pack lithium-ion batteries. Background technique [0002] Lithium-ion batteries are green, high-energy and environmentally friendly batteries that appeared in the 1990s. They have outstanding advantages such as high energy density, environmental friendliness, no memory effect, long cycle life, and less self-discharge. They are ideal for cameras, mobile phones, notebook computers, portable measurement It is an ideal power source for small and lightweight electronic devices such as instruments, and it is also an ideal light and high-energy power source for future electric vehicles and military applications. Therefore, lithium-ion batteries have become a hotspot of extensive research in the battery industry in recent years. [0003] Formation is an important pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/44H01M10/0525G01R31/392
CPCH01M10/058H01M10/446H01M10/0525G01R31/392Y02E60/10Y02P70/50
Inventor 施利毅张宁袁帅
Owner 上海大学浙江嘉兴新兴产业研究院
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