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A method for forming a long-life flexible packaging battery

A soft-packed battery and chemical formation method technology, which is applied in secondary batteries, electrochemical generators, non-aqueous electrolyte batteries, etc. The effect of small air volume and long life expectancy

Active Publication Date: 2019-01-04
江门市力源电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of soft-packed lithium-ion batteries, as the use time increases, the internal gas gradually increases, which leads to deformation of the soft-packed battery shell, and the separation between the positive and negative electrodes in the electrode core, thus affecting the life of the battery.

Method used

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  • A method for forming a long-life flexible packaging battery
  • A method for forming a long-life flexible packaging battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Place the liquid-injected soft-packaged battery between the splints, place the battery in a glove box, vacuumize, inject protective gas, seal the battery and take it out;

[0036] 2) Charge the battery with a constant current of 0.04C at room temperature to 3.0V;

[0037] 3) Heat the battery to 45°C and charge it at a constant voltage of 3.0V until the current drops below 0.01C;

[0038] 4) Perform constant current charging and discharging cycles between 3.0V and 2.8V at room temperature for 3 times, and the charging and discharging current is 1.5 times the current in step 2;

[0039] 5), put the battery into the glove box, cut the mouth, evacuate and exhaust, pass in protective gas, seal the battery and take it out;

[0040] 6) At room temperature, pulse charge the battery to 3.5V with a pulse current, the magnitude of the pulse current is 0.5C, the pulse action time is 600s, and the interval is 30s;

[0041] 7) Heat the battery to 40°C, pulse charge the battery t...

Embodiment 2

[0050] 1) Place the liquid-injected soft-packaged battery between the splints, place the battery in a glove box, vacuumize, inject protective gas, seal the battery and take it out;

[0051] 2) Charge the battery with a constant current of 0.02C at room temperature to 2.9V;

[0052] 3) Heat the battery to 40°C and charge it at a constant voltage of 2.9V until the current drops below 0.01C;

[0053] 4) Perform constant current charging and discharging cycles between 2.9V and 2.7V at room temperature for 3 times, and the charging and discharging current is 1.5 times the current in step 2;

[0054] 5), put the battery into the glove box, cut the mouth, evacuate and exhaust, pass in protective gas, seal the battery and take it out;

[0055] 6) At room temperature, pulse charge the battery to 3.4V with a pulse current, the magnitude of the pulse current is 0.1C, the pulse action time is 100s, and the interval is 10s;

[0056] 7) Heat the battery to 35°C, pulse charge the battery to ...

Embodiment 3

[0065] 1) Place the liquid-injected soft-packaged battery between the splints, place the battery in a glove box, vacuumize, inject protective gas, seal the battery and take it out;

[0066] 2) Charge the battery with a constant current of 0.03C at room temperature to 2.9V;

[0067] 3) Heat the battery to 45°C and charge it at a constant voltage of 2.9V until the current drops below 0.01C;

[0068] 4) Perform constant current charge and discharge cycles between 2.9V and 2.7V for 5 times at room temperature, and the charge and discharge current is 1.5 times the current in step 2;

[0069] 5), put the battery into the glove box, cut the mouth, evacuate and exhaust, pass in protective gas, seal the battery and take it out;

[0070] 6) At room temperature, pulse charge the battery to 3.5V with a pulse current, the magnitude of the pulse current is 0.3C, the pulse action time is 200s, and the interval is 20s;

[0071] 7) Heat the battery to 40°C, pulse charge the battery to 3.8V w...

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Abstract

The invention provides a forming method of a long-life flexible packaging battery, which comprises the steps of exhaust the battery in stages during the forming process and a step-by-step forming process, thereby forming a stable SEI film and avoiding the gas production of the battery during the use process and causing the expansion and deformation of the battery.

Description

technical field [0001] The invention relates to the technical field of soft-packaged lithium-ion batteries, in particular to a formation method for long-life soft-packaged lithium-ion batteries. Background technique [0002] As an important means of lightweight and high-energy lithium-ion batteries, soft-pack technology is expected to continue to increase penetration in new capacity expansions, thereby achieving an investment growth rate higher than the scale of industry expansion. Compared with hard-shell batteries (square and cylindrical), soft-pack batteries have the characteristics of flexible design, light weight, small internal resistance, not easy to explode, many cycles, and high energy density, which can improve the energy of power batteries at the current technical level Density, further narrowing the gap with fuel vehicles in terms of cruising range. Flexible packaging, as a means of making batteries lightweight and high-energy, will occupy a relatively high prop...

Claims

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Application Information

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IPC IPC(8): H01M10/44H01M10/058
CPCH01M10/058H01M10/446Y02E60/10Y02P70/50
Inventor 邓丽萍
Owner 江门市力源电子有限公司
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