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Aging method of lithium ion battery with flexible package after being precharged

A lithium-ion battery and flexible packaging technology, which is applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, sustainable manufacturing/processing, etc., can solve the problems of long production cycle and low efficiency, and achieve improved film quality, improved conductivity, The effect of shortening the aging time

Inactive Publication Date: 2011-05-04
惠州市博能新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process is simple, the production cycle is long and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The pre-charged soft-package lithium-ion battery is not put on the fixture for aging process, the aging environment temperature is 30 °C, and the aging time is 24h.

[0017] The 505060 type flexible packaging lithium-ion battery 500PCS was arbitrarily selected. After pre-charging, the splint was not installed, and the temperature was 30 °C for aging for 24 hours. The average internal resistance of the flexible packaging lithium ion battery was 37.5mΩ, and the average thickness of the flexible packaging lithium ion was 5.00mm.

Embodiment 2

[0019] The upper splint of the pre-charged flexible packaging lithium-ion battery is aging, the aging environment temperature is 30 °C, and the aging time is 24 hours.

[0020] Randomly select 500PCS type 505060 soft-packed lithium-ion battery, put a clamp on the battery after pre-charging, clamp the two sides of the battery with the clamping plates of the clamp, and age at an ambient temperature of 30 ℃ for 24 hours, the average internal resistance of the battery is 35.5mΩ, the thickness Average 4.90mm.

Embodiment 3

[0022] The pre-charged soft-package lithium-ion battery is aged with a fixture, and the aging environment temperature is 50°C for 12h.

[0023] The 505060 soft-packed lithium-ion battery 500PCS was arbitrarily selected, pre-charged and then placed on a fixture, aged for 12 hours at an ambient temperature of 50°C, the average internal resistance of the battery was 32.5mΩ, and the average thickness was 4.83mm.

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Abstract

The invention relates to a method for preparing a lithium ion battery with a flexible package, in particular to an aging process of a lithium ion battery with a flexible package after being precharged. The aging method of a lithium ion battery with a flexible package after being precharged comprises the following steps: putting the precharged lithium ion battery with the flexible package into the environment at the high temperature of 30-70 DEG C; aging; and standing for 6-24h. The invention optimizes the aging process of the lithium ion battery with the flexible package after being precharged, rapidly stabilizes the SEI (Solid Electrolyte Interface) film of the battery after being precharged by selecting the appropriate high-temperature environment, enhances the conductivity of electrolyte at the high temperature, strengths the activity, and accelerates the recombination course of the electrolyte and the SEI film. The aging process after precharge provided by the invention can enhance the filming quality of the lithium ion battery with the flexible package, can shorten the aging time and is beneficial to the thickness control of the battery at the same time. In the invention, a clamp is used for the lithium ion battery with the flexible package in the high-temperature aging course, and the clamp can exert the pressure on the plane of the battery so that the force of the whole plane is more uniform, and the thickness and shape of the battery are maintained by utilizing the clamp.

Description

technical field [0001] The invention relates to a preparation method of a soft-packed lithium-ion battery, in particular to an aging process for the soft-packed lithium-ion battery after precharging. Background technique [0002] The research on the electrochemical performance of flexible packaging lithium-ion batteries, such as rate discharge capacity, high and low temperature discharge capacity and battery cycle stability, shows that flexible packaging lithium-ion batteries have non-productive and high application value. Flexible packaging lithium-ion batteries are different from metal casing lithium-ion batteries and polymer lithium-ion batteries. Flexible packaging lithium-ion batteries have the advantages of high energy, good shape plasticity and simple production process. Flexible packaging lithium-ion batteries have the characteristics of arbitrary customization of shape, wide capacity design, light weight, and high safety. They are increasingly used in digital, toy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 郭明刘培松
Owner 惠州市博能新能源有限公司
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