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Lithium ion battery

A lithium-ion battery and molecular sieve technology, which is applied in secondary batteries, secondary battery gas removal, secondary battery repair/maintenance, etc., can solve the problem of increased cost of lithium-ion batteries, which have not yet entered industrial application, and the application of ternary cathode materials Problems such as unclear prospects can achieve the effect of improving cycle life, improving safety performance, and solving battery bulging

Pending Publication Date: 2020-07-17
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has been applied in ternary cathode materials with medium and low nickel content, but the application prospect of ternary cathode materials with high nickel content is not clear; the latter has not yet entered industrialization due to the high cost of lithium-ion batteries caused by expensive additives. application
On the other hand, even if the above strategies and methods are adopted, the occurrence of gas production cannot be avoided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The lithium-ion battery is a square battery, which consists of an electrode group, an aluminum case, a gas capture structural unit, a cover plate, tabs, and an explosion-proof valve. The pole group adopts the lamination or winding process to assemble the positive pole piece, negative pole piece and diaphragm in an orderly manner. The active material of the positive pole piece is nickel-cobalt lithium manganese oxide NCM811, the negative pole piece uses graphite as the active material, and the battery capacity is ~122A·h. The gas-trapping structural unit is composed of metal-organic framework (porous) materials and molecular sieve nanoparticles.

[0057] The gas trapping structural unit is prepared by the following process:

[0058] 1mmol of H 2 BTTA(2,5-di(1H-1,2,4-triazol-1-yl)terephthalic acid) ligand and 1mmol Cu(NO 3 ) 2 ·3H 2 O was reacted in a hydrothermal reactor for 48 h, cooled to room temperature and washed several times with deionized water and acetone, ...

Embodiment 2

[0065] The lithium-ion battery is a square battery, which consists of an electrode group, an aluminum case, a gas capture structural unit, a cover plate, tabs, and an explosion-proof valve. The pole group adopts the lamination or winding process to assemble the positive pole piece, negative pole piece and diaphragm in an orderly manner. The active material of the positive pole piece is nickel-cobalt lithium manganese oxide NCM811, the negative pole piece uses graphite as the active material, and the battery capacity is ~122A·h. The gas capture structural unit is composed of metal-organic framework (porous) materials, molecular sieves, cerium-zirconium solid solution, and barium oxide nanoparticles.

[0066] The gas trapping structural unit is prepared by the following process:

[0067] 1mmol of H 2 BTTA ligand and 1mmol of Cu(NO 3 ) 2 ·3H 2 O was reacted in a hydrothermal reactor for 48 h, cooled to room temperature and washed several times with deionized water and aceton...

Embodiment 3

[0076] The lithium-ion battery is a square battery, which consists of an electrode group, an aluminum case, a gas capture structural unit, a cover plate, tabs, and an explosion-proof valve. The pole group adopts the lamination or winding process to assemble the positive pole piece, negative pole piece and diaphragm in an orderly manner. The active material of the positive pole piece is nickel-cobalt lithium manganese oxide NCM811, the negative pole piece uses graphite as the active material, and the battery capacity is ~122A·h. The gas-trapping structural unit is composed of metal-organic framework (porous) material, molecular sieve, cerium-zirconium solid solution, barium oxide, and Pd-based molecular sieve nanoparticles.

[0077] The gas trapping structural unit is prepared by the following process:

[0078] 1mmol of H 2 BTTA ligand and 1mmol of Cu(NO 3 ) 2 ·3H 2 O was reacted in a hydrothermal reactor for 48 h, cooled to room temperature and washed several times with d...

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Abstract

The invention discloses a lithium ion battery. The lithium ion battery includes a shell; a gas trapping structure unit which is arranged at the inner side of the shell and is formed by at least one adsorption active material. In the lithium ion battery, the gas trapping structure unit arranged at the inner side of the shell can spontaneously adsorb the gas generated in the battery circulation process without the additional pushing force (such as pressure, etc.), the safety performance of the battery can be effectively improved by timely removing the generated gas in the charging and discharging cycle process, the battery bulge problem is solved, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of energy storage equipment, in particular, the invention relates to lithium ion batteries. Background technique [0002] Driven by energy transformation and environmental protection demands, battery technology has developed rapidly. In the field of transportation and travel, pure electric vehicles powered by lithium-ion batteries have entered commercialization and gained a certain market share. However, as the core component of pure electric vehicles, lithium-ion [0003] There are still many defects and deficiencies in the battery. From the perspective of technical application, lithium-ion batteries have two major pain points: the first is that the energy density cannot meet the needs of long mileage; the second is the safety problem caused by the thermal runaway of lithium-ion batteries. Although researchers have made a lot of efforts from the dimensions of cathode materials, electrochemical systems, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/52H01M10/0525
CPCH01M10/52H01M10/0525Y02E60/10
Inventor 朱金鑫拉杰什·麦加普拉杰什·PP李红朝王鹏飞苏强
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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