Manufacturing method of high-temperature resistant ternary lithium ion battery

A technology of lithium-ion battery and production method, which is applied in the production field of high-temperature-resistant ternary lithium-ion batteries, can solve the problems of battery loss of use function, battery cell swelling, etc., and achieve improved pass rate, good high-temperature resistance performance, and product pass rate high effect

Inactive Publication Date: 2018-08-14
MEIZHOU LIANGNENG NEW ENERGY SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps identify if there were any problems with batteries after they have been charged up or used for some time without being fully functional again when needed. It also makes it easier to determine whether these batteries meet certain standards before use them on their intended purpose.

Problems solved by technology

The technical problem addressed by these inventors relates how to enhance the thermal stability of laminar LiCoO/graphite composite material during charging or discharging cycles while maintain its effectiveness over time under extreme conditions like those found inside portable devices.

Method used

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  • Manufacturing method of high-temperature resistant ternary lithium ion battery
  • Manufacturing method of high-temperature resistant ternary lithium ion battery
  • Manufacturing method of high-temperature resistant ternary lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: positive and negative electrode sheet production method is the same as comparative example, positive electrode sheet is soaked 3mins with the acetone solution that contains 1% vinyltriethoxysilane, 0.3%HOAc after making sheet, then takes out positive electrode sheet and puts Put it in a 60-degree oven for 5 minutes. After the acetone on the surface of the positive electrode is completely evaporated, take it out and make the battery according to the normal process of lithium-ion batteries.

Embodiment 2

[0029] Embodiment 2: the method for making the positive and negative plates is the same as that of the comparative example. The positive plate is soaked for 3mins with the acetone solution containing 2% vinyltriethoxysilane and 0.3% HOAc after the film is finished, and then the positive plate is taken out and placed in Put it in a 60-degree oven for 5 minutes. After the acetone on the surface of the positive electrode is completely evaporated, take it out and make the battery according to the normal process of lithium-ion batteries.

Embodiment 3

[0030] Embodiment 3: the positive and negative electrode sheet production method is the same as the comparative example, and the positive electrode sheet is soaked for 3mins with the acetone solution containing 3% vinyltriethoxysilane and 0.3% HOAc after making the sheet, and then the positive electrode sheet is taken out and placed in Put it in a 60-degree oven for 5 minutes. After the acetone on the surface of the positive electrode is completely evaporated, take it out and make the battery according to the normal process of lithium-ion batteries.

[0031] test:

[0032] Take each group of comparative example and embodiment batteries, and test the capacity, voltage, internal resistance, and thickness of the batteries. After fully charging (charging to 4.2V), store them at a high temperature of 85 degrees for 4 hours and 24 hours respectively. The test data are as follows:

[0033]

[0034]

[0035] Judging from the capacity and internal resistance of the fabricated cells,

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Abstract

The invention discloses a manufacturing method of a high-temperature resistant ternary lithium ion battery, and relates to the technical field of the battery manufacturing. The method comprises the following steps: stirring raw materials, respectively placing the anode raw material and the cathode raw material of the battery in a vacuum planet stirrer after passing the detection, stopping stirringafter the raw materials are stirred into the slurry; coating electrode, placing the stirred raw material into an electrode coating machine, and uniformly coating the slurry on the cathode and anode metal foils of the battery; making electrode plate, rolling the metal foils after coating the slurry, and then slicing and welding to manufacture electrode plates, and baking the electrode plate at high temperature for further use; winding the electrode plate, placing the baked electrode plate into a semi-automatic winding machine to be wound as the battery; shell processing, packaging the batteryafter performing shell punching and trimming on the battery shell material, and then performing corner pressing and pad pasting processing, and performing flaring processing after performing short-circuit detection; injecting liquid; formation processing; and packaging. The high-temperature resistant ternary lithium ion battery prepared through the manufacturing method disclosed by the invention is good in high temperature resistance and high in product percent of pass.

Description

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Claims

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Application Information

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Owner MEIZHOU LIANGNENG NEW ENERGY SCI & TECHCO
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