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Long-storage lifetime lithium-ion battery and treatment method therefor

A lithium-ion battery, storage life technology, applied in the direction of secondary batteries, battery components, circuits, etc., can solve the problems of battery performance degradation, etc., to achieve the effect of reducing self-discharge rate, ensuring stability, and improving storage life

Inactive Publication Date: 2016-05-04
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the storage process of lithium-ion batteries, the battery performance will be partially degraded due to self-discharge.

Method used

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  • Long-storage lifetime lithium-ion battery and treatment method therefor
  • Long-storage lifetime lithium-ion battery and treatment method therefor
  • Long-storage lifetime lithium-ion battery and treatment method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A lithium-ion battery with long shelf life, processed by:

[0029] Using polyvinylidene fluoride (PVDF) as a binder, nitrogen methylpyrrolidone (NMP) as a solvent, using a mixer to prepare the above materials into a glue solution, wherein the mass ratio of each material is as follows: binder: solvent = 6:94 , the glue solid content is 6%.

[0030] Apply the above glue on the inner wall of the 18650 battery steel case, spread evenly and dry. The thickness of the coating is less than or equal to 5 μm, thus completing the insulation treatment of the shell.

Embodiment 2

[0032] A lithium-ion battery with long shelf life, processed by:

[0033] Using polyvinylidene fluoride as a binder, nitrogen methylpyrrolidone (NMP) as a solvent, using a mixer to prepare the above materials into glue, wherein the mass ratio of each material is as follows: binder:solvent=6:94, the glue The liquid-solid content is 6%.

[0034] Apply the above glue on the inner wall of the 18650 battery steel case, spread evenly and dry. The thickness of the coating is 10 μm, thereby completing the insulation treatment of the shell.

Embodiment 3

[0036] A lithium-ion battery with long shelf life, processed by:

[0037] Adopt carboxymethyl cellulose (CMC) as binding agent, nitrogen methylpyrrolidone (NMP) is solvent, adopt agitator that above-mentioned material is formulated into glue solution, wherein each material mass ratio is as follows: binding agent: solvent=2 :98, the glue solid content is 2%.

[0038] Apply the above glue on the inner wall of the 18650 battery steel case, spread evenly and dry. The thickness of the coating is 10 μm, thereby completing the insulation treatment of the shell.

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Abstract

The invention relates to a long-storage lifetime lithium-ion battery and a treatment method therefor, and belongs to the technical field of lithium-ion batteries. The long-storage lifetime lithium-ion battery is characterized in that the inner wall of a steel shell for the long-storage lifetime lithium-ion battery is coated with an insulating coating. The treatment method for the long-storage lifetime lithium-ion battery is characterized by comprising the following treatment processes: coating the inner wall of the steel shell for the lithium-ion battery with the insulating coating; drying the insulating coating and finishing insulating treatment of the shell; and assembling the shell and a battery core. By a coating technology, the stability of the steel shell for the lithium-ion battery during storage and long-term cycle can be ensured; the lifetime characteristics of the battery are greatly improved; meanwhile, the safety performance of the battery is improved; and the long-storage lifetime lithium-ion battery has the advantages of being simple in structure, convenient to operate and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a long storage life lithium ion battery and a processing method thereof. Background technique [0002] At present, as an advanced battery developed in the early 1990s, lithium-ion batteries have a series of advantages such as high specific energy, high voltage, wide operating temperature range, low self-discharge rate and no memory effect. , Space power supply field, especially the field of civilian electric vehicles have been widely used. With the continuous expansion and deepening of application fields, the requirements for lithium-ion batteries are also getting higher and higher. [0003] At the same time, there are not only related requirements for the specific energy and specific power of lithium-ion batteries, but also high requirements for the performance of lithium-ion batteries during storage. During the storage process of lithium-ion batteries, the batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/0525H01M50/116H01M50/119H01M50/121
CPCH01M10/0525H01M50/124Y02E60/10
Inventor 罗萍王炜娜郑见杰付丽霞王盼
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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