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N‑fatty acylglutamic acid as a gelling factor to enhance the safety of lithium batteries

A technology of fatty acylglutamic acid and gel factor, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, electrolyte batteries, etc., can solve the problems of battery explosion and achieve the effect of ensuring safety

Active Publication Date: 2017-05-24
吉林省东驰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] The invention discloses a method for improving the safety of lithium batteries by using N-fatty acylglutamic acid as a gel factor, which solves the problem of safety accidents such as combustion and explosion of the battery caused by the leakage of the electrolyte solution in the surplus free state during the use of the battery, and ensures Ensure the safety of lithium batteries during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] According to the lithium battery production process (pulping-coating-slicing-rolling-lamination-sealing-formation) to produce a lithium battery with a capacity of 40Ah, inject 240 grams of electrolyte. After the formation is completed, add 1.2 gram of N-fatty acyl glutamic acid (addition ratio is 0.5% of the electrolyte), heated to 50°C-55°C, and kept for 24 hours, so that the gelling factor is heated and dissolved in the organic solvent of the electrolyte, and then cooled to room temperature. this invention.

Embodiment 2

[0020] According to the lithium battery production process (pulping-coating-slicing-rolling-lamination-sealing-formation) to produce a lithium battery with a capacity of 60Ah, inject 360 grams of electrolyte. After the formation is completed, add 10.8 gram of N-fatty acyl glutamic acid (addition ratio is 3% of the electrolyte), heated to 50°C-55°C, and kept for 30 hours, so that the gelling factor is heated and dissolved in the organic solvent of the electrolyte, and then cooled to room temperature. this invention.

[0021] Test case

[0022] Under the same manufacturing process conditions, put the battery without N-fatty acylglutamic acid and the product of the present invention at a temperature of 50-60°C for 10-15 hours, then cool to room temperature, and place them in the glove box after 24 hours Open the safety valves of the two batteries and pour out the electrolyte. The battery without N-fatty acylglutamic acid can pour out 45 grams of free electrolyte, and the battery...

Embodiment 3

[0025] According to the lithium battery production process (pulping-coating-slicing-rolling-lamination-sealing-formation) to produce a lithium battery with a capacity of 100Ah, inject 600 grams of lithium hexafluorophosphate. After the formation is completed, add 30 grams to the electrolyte N-fatty acyl glutamic acid (addition ratio is 5% of the electrolyte), heated to 50 ℃ ~ 55 ℃, heat preservation for 30 hours, so that the gelling factor is heated and dissolved in the organic solvent of the electrolyte, and then cooled to room temperature to obtain this product invention.

[0026] Test case

[0027] Under the same manufacturing process conditions, put the battery without N-fatty acylglutamic acid and the product of the present invention at a temperature of 50-60°C for 10-15 hours, then cool to room temperature, and place them in the glove box after 24 hours Open the safety valve of the two batteries and pour out the electrolyte. The battery without N-fatty acylglutamic acid...

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PUM

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Abstract

The invention provides a method for improving the safety of lithium batteries by using N-fatty acylglutamic acid as a gel factor. After the battery is formed, N-fatty acylglutamic acid gel is added to the electrolyte in a ratio of 0.5 to 5 wt%. factor, heated to 50°C to 55°C, and kept warm for more than 24 hours, so that the gelling factor is heated and dissolved in the organic solvent of the electrolyte, and then cooled to room temperature. N-fatty acylglutamic acid is used as the gelling factor to convert the excess free electrolyte into a gel electrolyte. After the free electrolyte is consumed, the gel electrolyte can be transformed into Free electrolyte; to prevent the leakage of excess free electrolyte during the use of the battery, which will cause safety accidents such as combustion and explosion of the battery, so as to ensure the safety of the lithium battery during use.

Description

technical field [0001] The invention provides a method for improving the safety of lithium batteries by using N-fatty acylglutamic acid as a gelling factor. The gelling factor N-fattyylglutamic acid is added inside the battery to change the excess free electrolyte into a gel state The electrolyte and the method for improving the safety of lithium batteries belong to the technical field of power battery production methods. [0002] technical background [0003] Lithium-ion batteries have the advantages of high energy density, no memory effect, wide operating temperature range, long cycle life, and environmental friendliness. They are rechargeable batteries (secondary batteries) with the best comprehensive performance available for selection. At present, commercial lithium-ion batteries mostly use liquid organic substances with high freezing point and low viscosity as solvents, and lithium salts are added to them as electrolytes to form liquid electrolytes. The use of liquid e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0525H01M10/0565H01M10/4235H01M2300/0085Y02E60/10Y02P70/50
Inventor 谢海明康书文王荣顺孙立群
Owner 吉林省东驰新能源科技有限公司