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Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof

A nickel-cobalt lithium manganate, high-rate technology is applied to the high-safety nickel-cobalt lithium manganate cylindrical high-rate battery and its preparation field, and can solve the problems of increasing battery safety hazards and complex production processes.

Active Publication Date: 2013-11-27
河南比得力高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

However, in order to improve the rate performance of cylindrical lithium-ion batteries, the existing technology simply adds tab leads at will on the pole piece of traditional battery design, but the structure of the pole piece has no corresponding improvement of light foil and adhesive paper, and the electrolyte has no corresponding improvement. The change of the production process not only makes the production process complicated, but also increases the safety hazards in the process of using the battery.

Method used

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  • Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof
  • Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof
  • Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof

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preparation example Construction

[0036] A method for preparing a nickel-cobalt lithium manganese oxide cylindrical high-rate battery, comprising the steps of:

[0037] Step 1: Preparation of positive electrode active material: mixing the following raw materials in parts by weight: 1 to 3 parts of binder, 92 to 95 parts of nickel-cobalt lithium manganese oxide, 1 to 3 parts of conductive carbon black, 1 1-3 parts of conductive graphite and 33-82 parts of N-methylpyrrolidone;

[0038] Step 2: Preparation of negative electrode active material: mixing the following raw materials in parts by weight: 92 to 95 parts of graphite, 1 to 3 parts of conductive carbon black, 3 to 5 parts of binder and 100 to 150 parts Deionized water;

[0039] Step 3: Preparation of positive electrode sheet 6: Coating the positive electrode active material prepared in step 1 on the inner and outer ring surfaces of the aluminum foil respectively, and then placing it in a tunnel oven at a temperature of 70°C to 130°C Drying for 2 minutes...

Embodiment 1

[0053] A method for preparing a nickel-cobalt lithium manganese oxide cylindrical high-rate battery, comprising the steps of:

[0054] Step 1: Prepare the positive electrode active material: including the following raw materials mixed according to parts by weight: 2 parts of polyvinylidene fluoride, 93 parts of nickel cobalt lithium manganate, 3 parts of conductive carbon black, 2 parts of conductive graphite and 55 parts of N - methylpyrrolidone;

[0055] Step 2: Prepare the negative electrode active material: including the following raw materials mixed according to parts by weight: 93 parts of graphite, 3 parts of conductive carbon black, 4 parts of binder and 120 parts of deionized water; the binder is: A mixture of 1% to 2% sodium carboxymethyl cellulose and 2% to 3% butadiene rubber, wherein 1% to 2% sodium carboxymethyl cellulose is 1.5 parts, 2% to 3% butadiene This rubber is 2.5 parts.

[0056] Step 3: Preparation of positive electrode sheet 6: Coating the positive e...

Embodiment 2

[0070] A method for preparing a nickel-cobalt lithium manganese oxide cylindrical high-rate battery, comprising the steps of:

[0071] Step 1: Prepare the positive electrode active material: it is prepared by mixing the following raw materials in parts by weight: 1 part of binder, 92 parts of nickel-cobalt lithium manganese oxide, 1 part of conductive carbon black, 1 part of conductive graphite and 33 parts of N-formazan Base pyrrolidone;

[0072] Step 2: Prepare the negative electrode active material: it is prepared by mixing the following raw materials according to parts by weight: 92 parts of graphite, 1 part of conductive carbon black, 3 parts of binder and 100 parts of deionized water;

[0073] Step 3: Preparation of positive electrode sheet 6: Coating the positive electrode active material prepared in step 1 on the inner and outer ring surfaces of the aluminum foil respectively, and then placing it in a tunnel oven at a temperature of 70°C to 130°C Drying for 2 minutes,...

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Abstract

The invention belongs to a high-safety lithium nickel cobalt manganate cylindrical high-rate battery and a preparation method thereof. The battery comprises a nickel-plated steel case and a lithium ion battery cell in the nickel-plated steel case, wherein an upper insulating strip and a lower insulating strip are respectively arranged at the upper part and the lower part of the lithium ion battery cell; a cap is arranged on a mechanical seal port in the upper part of the nickel-plated steel case; the lithium ion battery cell comprises a positive plate, a first diaphragm, a negative plate and a second diaphragm which are superposed in sequence and reeled; by setting the positions of a positive pole leading-out end and a negative pole leading-out end and setting the sticking position and manner of a high-temperature adhesive tape, the battery production efficiency can be effectively improved and defects in a processing procedure can be reduced; as the first diaphragm and the second diaphragm are used in combination and electrolytes containing special additives are selected and used to coordinate with one another, the destructive safety performance test of the battery is 100% qualified. The battery has the advantages that the assembly is simple, the yield is high, the cycle performance is good, and the safety performance of resistance to overcharge, short circuit, needling, squeezing, impact and the like can be improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a high-safety nickel-cobalt lithium manganese oxide cylindrical high-rate battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the characteristics of high output voltage, high specific energy, stable discharge voltage and long cycle life. Therefore, lithium-ion batteries have been widely used in notebook computers, digital cameras, and mobile phones. And it has been applied more and more in the field of power and energy storage. In the field of power, when lithium-ion batteries are applied to electric tools, electric toys, and electric vehicles, the batteries need to have better high-current charge and discharge performance. [0003] At present, lithium-ion batteries that have been produced on a large scale include cylindrical steel-case batteries, square steel-aluminum-case batteries, and square soft-pack ...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M2/26H01M10/0525H01M10/0567H01M50/534H01M50/538
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 朱全健苑泽保张铭
Owner 河南比得力高新能源科技有限公司
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