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Insulating paint containing calcium fluoride, and preparation method, insulating coating, battery pole piece and lithium-ion battery

An insulating coating and insulating coating technology, applied in the field of lithium ion batteries, can solve the problems of poor insulation effect of insulating coating, affecting the service life of pole piece slitting die, pole piece rolling and slitting equipment damage, etc. Insulation effect, reduced production cost and equipment maintenance cost, reduced wear effect

Active Publication Date: 2016-01-13
CHINA AVIATION LITHIUM BATTERY LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem in the prior art, the insulation effect of the insulating coating formed by the insulating coating is poor, and when it is applied to a lithium-ion battery, due to the high hardness of the insulating coating, the damage to the pole piece rolling and slitting equipment is large, which affects the pole piece slitting mold The problem of service life

Method used

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  • Insulating paint containing calcium fluoride, and preparation method, insulating coating, battery pole piece and lithium-ion battery
  • Insulating paint containing calcium fluoride, and preparation method, insulating coating, battery pole piece and lithium-ion battery
  • Insulating paint containing calcium fluoride, and preparation method, insulating coating, battery pole piece and lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The insulating coating containing calcium fluoride of the present embodiment is made up of water, insulating material and binder, and the mass ratio of insulating material and binder is 90:10; Wherein binder is styrene-butadiene rubber emulsion, and insulating material is Calcium fluoride, the solid content of the insulating coating is 20wt%.

[0031] The insulating coating containing calcium fluoride in this embodiment is composed of an insulating material and a binder, wherein the binder is a styrene-butadiene rubber emulsion, and the active ingredient of the binder accounts for 10% by mass of the insulating coating, and the balance is calcium fluoride.

[0032] The preparation method of the insulating coating containing calcium fluoride in this embodiment is obtained by adding calcium fluoride and styrene-butadiene rubber emulsion into water, stirring and dispersing evenly; the solid content of the insulating coating is 20 wt%. Apply the insulating paint to the area...

Embodiment 2

[0036] The insulating coating containing calcium fluoride in this embodiment is composed of N-methylpyrrolidone, insulating material and binder, and the mass ratio of insulating material to binder is 90:10; wherein the binder is Arkema HSV -900 type PVDF powder, the insulating material is calcium fluoride, and the solid content of the insulating coating is 25wt%.

[0037] The insulating coating containing calcium fluoride in this embodiment is composed of insulating material and binder, wherein the binder is Arkema HSV-900 type PVDF powder, and the binder accounts for 10% by mass of the insulating coating. The balance is calcium fluoride.

[0038] The preparation method of the insulating coating containing calcium fluoride in this embodiment is obtained by adding calcium fluoride and PVDF powder into N-methylpyrrolidone, stirring and dispersing evenly; the solid content of the insulating coating is 25 wt%. Apply the insulating paint to the area that needs to be insulated, and...

Embodiment 3

[0042] The insulating coating containing calcium fluoride in this embodiment is composed of N-methylpyrrolidone, insulating material and binder, and the mass ratio of insulating material to binder is 90:10; wherein the binder is Arkema HSV -900 type PVDF powder, the insulating material is a mixture of calcium fluoride and alumina, the mass ratio of calcium fluoride to alumina in the mixture is 9:1, and the solid content of the insulating coating is 30wt%.

[0043] The insulating coating containing calcium fluoride in this embodiment is composed of insulating material and binder, wherein the binder is Arkema HSV-900 type PVDF powder, and the binder accounts for 10% by mass of the insulating coating. The balance is insulating material; the insulating material is composed of calcium fluoride and aluminum oxide in a mass ratio of 9:1.

[0044] The preparation method of the insulating coating containing calcium fluoride in this embodiment is obtained by adding calcium fluoride, alu...

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Abstract

The invention discloses an insulating paint containing calcium fluoride, and a preparation method, an insulating coating, a battery pole piece and a lithium-ion battery. The insulating paint comprises an insulating material and a binder at the mass ratio of (80-98) to (2-20), wherein the insulating material is the calcium fluoride or a mixture of the calcium fluoride and at least one of aluminum oxide and silicon dioxide; the mass content of the calcium fluoride in the insulating material is 70%-100%; and the insulating paint coats a to-be-insulated region and is dried, so as to obtain the insulating coating. Through reasonable collocation of the binder and the insulating material containing the calcium fluoride, the hardness of the insulating coating is effectively lowered on the basis that a good insulating effect of the insulating coating is kept, so that abrasion of related equipment can be effectively reduced when the pole piece is rolled and cut; and the service lifetime of a pole piece slitting mold is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an insulating coating containing calcium fluoride and a preparation method thereof, an insulating coating, a battery pole piece and a lithium ion battery. Background technique [0002] Lithium-ion batteries have the advantages of large capacity, high energy density, small size, light weight, and environmental protection. They have been widely used in digital electronic products and electric vehicle industries. [0003] Lithium-ion batteries have high energy density, especially power batteries. Ensuring battery safety is the key to battery production and application. Battery thermal runaway caused by short circuit is one of the main factors affecting battery safety performance. There are mainly two ways to reduce the potential safety hazard of battery short circuit: one is to install protective devices on the battery during the battery production proces...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M10/0525H01M50/586H01M50/593
CPCH01M10/0525H01M50/116Y02E60/10
Inventor 贾海怀永建王海文张国军张海峰白莉
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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