Formation and aging combined method of soft-pack lithium-ion battery and soft-pack lithium-ion battery

An ion battery, lithium ion technology, applied in the direction of secondary battery charging/discharging, secondary battery, electrochemical generator, etc. Avoid damage and improve the effect of dense uniformity

Active Publication Date: 2022-02-11
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-pack lithium-ion battery and soft-pack lithium-ion battery
  • Formation and aging combined method of soft-pack lithium-ion battery and soft-pack lithium-ion battery
  • Formation and aging combined method of soft-pack lithium-ion battery and soft-pack lithium-ion battery

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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 combination method of formation and aging of a soft-packed lithium-ion battery, which includes: performing segmented formation of the soft-packed lithium-ion battery to be formed: according to the first formation temperature A1: 20-25°C, the first formation Pressure B1: 0.05-0.15MPa constant current charge to the first cut-off voltage: 3.20-3.45V; according to the second formation temperature A2: 26-35℃, the second formation pressure B2: 0.16-0.30MPa constant current charge to the second cut-off Voltage: 3.60-3.80V; according to the third formation temperature A3: 36-45℃, the third formation pressure B3: 0.30-0.70MPa constant current charging to the third cut-off voltage: 3.95-4.10V; the formed soft-packed lithium Ion cells are subjected to segmental aging; the above method can improve the integrity of the SEI film and the cycle performance of the battery.

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 Patents(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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