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Preparation process of flame retardant battery

A preparation process and battery technology, applied in the direction of batteries, electrolyte battery manufacturing, battery pack components, etc., can solve the problems of battery or material explosion, combustion, burning of battery shells, etc., and achieve the effect of increasing safety and avoiding losses.

Inactive Publication Date: 2014-11-26
SHANDONG XINGYU ENTERPRISE S&T
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  • Abstract
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Problems solved by technology

[0002] During the use of the current lithium-ion battery, when the operating voltage exceeds the battery safety voltage of 4.2V or a short circuit occurs inside or outside the battery, the heat generated is greater than the escape heat, which will cause the components in the electrolyte to decompose. And burning, and then burning the battery case, after the battery case burns, there will be a joint combustion phenomenon, that is, the burning of one battery causes the burning of other batteries or substances to cause an explosion

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  • Preparation process of flame retardant battery

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Embodiment Construction

[0014] Such as figure 1 As shown, a flame-retardant battery preparation process, the slurry prepared by the following sequential steps is coated on the surface of the battery casing, and the coating thickness is 5-10um; the preparation steps of the slurry are as follows:

[0015] A According to the mass percentage of glass fiber 50%-80%, solvent 18%-43%, binder 0.2%-10%, measure raw materials;

[0016] B put the raw materials measured in step A in a mixer, and stir at a speed of 2000-4000 rpm to disperse the material evenly and control the viscosity at 1000-4000; the solid content is controlled at 40-70%;

[0017] C coating the slurry prepared in step B on the outer surface of the battery casing with a coating thickness of 5-10um, and the battery casing is made of aluminum-plastic film, metal aluminum casing, metal steel casing, or plastic casing. The solvent is nitrogen methyl pyrrolidone or purified water or a combination of the two, and the binder is one or more combinatio...

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Abstract

The invention relates to a preparation process of a flame retardant battery, which comprises the step of coating the surface of a battery shell with pulp, with the coating thickness of 5 to 10 microns, wherein the pulp is prepared by the following steps in sequence: (A) weighing following raw materials in mass percent: 50% to 80% of glass fiber, 18% to 43% of solvent and 0.2% to 10% of bonding agent; (B) putting the raw materials weighed in the step (A) into a mixer, and mixing at the rotating speed of 2,000 to 4,000 revolutions, so that the materials are uniformly dispersed, the viscosity is controlled in a range of 1,000 to 4,000, and the solid content is controlled in a range of 40% to 70%; and (C) coating the outer surface of the battery shell with the pulp prepared in the step (B), wherein the coating thickness is 5 to 10 microns. By virtue of a flame retardant material applied to the battery shell, the phenomenon of joint combustion of other batteries caused by combustion of a single battery is effectively prevented, thereby increasing the safety of the battery and avoiding unnecessary loss.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery manufacturing, and in particular relates to a flame-retardant battery that prevents the joint combustion of the battery under special circumstances. Background technique [0002] During the use of the current lithium-ion battery, when the operating voltage exceeds the battery safety voltage of 4.2V or a short circuit occurs inside or outside the battery, the heat generated is greater than the escape heat, which will cause the components in the electrolyte to decompose. And burning, and then burning the battery case, after the battery case is burned, there will be a joint combustion phenomenon, that is, the burning of one battery causes the burning of other batteries or materials to cause an explosion. Contents of the invention [0003] In order to overcome the shortcomings of the current prior art and prevent the joint combustion reaction in special circumstances, the present invention prevent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M2/02H01M50/10
CPCH01M10/058H01M2200/00H01M50/124H01M50/1245Y02E60/10Y02P70/50
Inventor 赵海刚吕浩孔德杰李浩
Owner SHANDONG XINGYU ENTERPRISE S&T