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A kind of formation method of polymer lithium ion battery

A technology of lithium ion battery and formation method, applied in the field of polymer lithium ion battery manufacturing, can solve the problems such as displacement of the electrode winding core and aluminum plastic film of the battery, shortening of the formation voltage and formation time, and the battery cannot be loaded into the mobile phone compartment, etc. To achieve the effect of no hidden quality problems, good hardness, and low pressure

Active Publication Date: 2021-09-03
深圳市启明新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when pressure formation is used, due to the unreasonable design of pressure and temperature at each stage, it is easy to cause displacement between the electrode winding core and the aluminum-plastic film of the battery, resulting in the scrapping of the battery
At the same time, due to the pursuit of production efficiency only, the formation voltage is reduced and the formation time is shortened, resulting in the battery softening after formation, and even the peeling phenomenon of the negative electrode active material and the base copper foil (more serious after cycling), making the battery surface Bulging, poor thickness, resulting in the battery not being able to be put into the mobile phone compartment, or the phenomenon of opening the screen of the mobile phone during use in the mobile phone compartment, causing the mobile phone to be scrapped

Method used

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  • A kind of formation method of polymer lithium ion battery
  • A kind of formation method of polymer lithium ion battery
  • A kind of formation method of polymer lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 356290PL300FY 4.4V battery high temperature formation process

[0049] (1) After vacuumizing the battery liquid injection, after aging at a high temperature of 50±5°C for 24 hours, put the battery on the pressure forming cabinet;

[0050] (2) After the temperature of the pressure forming cabinet reaches the set temperature of 50°C, the battery is compressed, the layer spacing of the pressure forming cabinet is reduced, the closing speed between the layers is 0.5cm / s, and the closing pressure is 0.50kg / cm 2 , closing time is 10min.

[0051] (3) Send parameter formation, use 2 stages of step charging and 3 stage discharge, and use 4 stages of different pressures, the specific formation pressure and formation parameter settings are shown in Table 1-1 and 1-2.

[0052] (4) After the pressure is turned into pressure, immediately remove the battery and put it in a low temperature environment of 0°C for rapid cooling for 3 hours;

[0053] (5) Vacuumize and seal the battery a...

Embodiment 2

[0060] 356290PL300FY 4.4V battery high temperature formation process

[0061] (1) After vacuuming the injection liquid, after aging at a high temperature of 85°C±5°C for 4h, put the cell on the pressure forming cabinet;

[0062] (2) After the temperature of the pressure forming cabinet reaches the set temperature of 70°C, the battery is compressed, the layer spacing of the pressure forming cabinet is reduced, the closing speed between the layers is 0.5cm / s, and the closing pressure is 0.50kg / cm 2 , closing time is 10min.

[0063] (3) Send parameter formation, use 2 stages of step charging and 3 stage discharge, and use 4 stages of different pressures, the specific formation pressure and formation parameter settings are shown in Table 2-1 and 2-2.

[0064] (4) Immediately after the pressure forming is completed, remove the battery and place it in a low temperature environment of 0°C for rapid cooling for 3 hours;

[0065] (5) Vacuum seal the battery after cooling, and the ele...

Embodiment 3

[0072] 356290PL300FY 4.4V battery high temperature formation process

[0073] (1) After vacuuming the injection liquid, after aging at a high temperature of 50°C±5°C for 4h, put the cell on the pressure forming cabinet;

[0074] (2) After the temperature of the pressure forming cabinet reaches the set temperature of 70°C, the battery is compressed, the layer spacing of the pressure forming cabinet is reduced, the closing speed between the layers is 0.5cm / s, and the closing pressure is 0.50kg / cm 2 , closing time is 10min. .

[0075] (3) Send parameter formation, use 2 stages of step charging and 3 stage discharge, and use 4 stages of different pressures, the specific formation pressure and formation parameter settings are shown in Table 3-1 and 3-2.

[0076] (4) Immediately after the pressure forming is completed, remove the battery and place it in a low temperature environment of 0°C for rapid cooling for 3 hours;

[0077] (5) Vacuum seal the battery after cooling, and the ...

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Abstract

The invention belongs to the field of polymer lithium-ion batteries, and in particular relates to a method for forming a polymer lithium-ion battery, comprising the following steps: (1) aging the battery injected into a vacuum at 50-85°C; (2) setting Set the temperature and press the battery tightly; (3) Form the battery, using 2 stages of step charging and 3 stages of step discharge, using a total of 4 stages of different pressures; (4) Take off the battery, rapidly cool it, vacuum seal it, and age it Get unqualified products. The invention can improve the displacement of the electrode core and the aluminum-plastic film produced when the lithium-ion battery is formed under pressure, and can improve the hardness and thickness of the battery and the peeling phenomenon of the negative electrode active material and the base copper foil, and through the use of high temperature The high-humidity method promptly picks out batteries with bad problems, which not only improves the performance of the batteries, but also ensures the quality of product shipments.

Description

technical field [0001] The invention belongs to the field of polymer lithium-ion battery manufacturing, in particular to a chemical formation method capable of improving the hardness, thickness and cycle performance of high-energy-density polymer lithium-ion batteries. Background technique [0002] With the demand for high energy density and portability in the market, lithium-ion batteries have developed from the original steel shell and aluminum shell batteries to polymer lithium-ion batteries. Polymer lithium-ion batteries have high energy density, small size, good safety performance, The advantages of flexible shape design are widely used in 3C digital products. Especially in recent years, with the rapid development of 4G and 5G, people have more requirements for the experience of mobile phones, not only higher energy density, but also faster charging. This puts higher demands on the manufacture of lithium-ion batteries. [0003] In the production process of polymer lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058H01M10/446Y02E60/10Y02P70/50
Inventor 刘亚明左志良杨纪荣
Owner 深圳市启明新能源科技有限公司
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