Nickel-cobalt-manganese-lithium power battery and manufacturing method thereof

A power battery, nickel-cobalt-manganese-lithium technology, used in battery electrodes, secondary batteries, battery pack components, etc., can solve the problems of electrical performance deterioration of cells, inability to achieve the safety performance of cells, and reduce thermal shrinkage. efficiency, improve high temperature performance and safety performance, and improve the effect of high temperature storage performance

Inactive Publication Date: 2015-03-04
YUNNAN TIN GROUP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The safety performance requirements of large-capacity energy storage power batteries are very strict, and various safety-improving materials are matched with each

Method used

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  • Nickel-cobalt-manganese-lithium power battery and manufacturing method thereof
  • Nickel-cobalt-manganese-lithium power battery and manufacturing method thereof
  • Nickel-cobalt-manganese-lithium power battery and manufacturing method thereof

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Experimental program
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Effect test

example 186590-10

[0019] Example of the present invention 186590-10Ah nickel cobalt manganese lithium lithium ion battery

Embodiment 1

[0021] 1. The positive active material is nickel cobalt lithium manganese oxide, and the D50 value is 8-10 μm. The negative electrode adopts one or two of mesophase carbon microspheres, artificial graphite and composite graphite.

[0022] 2. The diaphragm is made of Al 2-x B x o 3 / PP / PE / PP high-safety ceramic diaphragm. B = one or more of alkaline earth metal ions, rare earth metal ions, transition metal ions, x = 0.02-0.1.

[0023] 3. The electrolyte adopts high and low temperature solvent formula, containing 25% ethylene carbonate EC, 5% propylene carbonate PC, 30% fluorobenzene FB, 20% diethyl carbonate DEC, lithium salt is lithium hexafluorophosphate LiPF6, the concentration is 10% . Additives are ethylene carbonate VEC, vinylene sulfate, fluorinated hydrocarbons, maleic acid esters, and maleimide, accounting for 10% of the total electrolyte solution.

[0024] 4. The positive / negative pole pieces of the square aluminum shell lithium-ion battery are wound, and the cor...

Embodiment 2

[0029] 1. The positive active material is nickel cobalt lithium manganese oxide, and the D50 value is 8-10 μm. One or both of artificial graphite and composite graphite are used for the negative electrode.

[0030] 2. The diaphragm is made of Al 2 o 3 / PP / PE / PP high safety ceramic diaphragm.

[0031] 3. The electrolyte adopts a high and low temperature solvent formula, containing 25% EC, 5% PC, 30% FB, 20% DEC, and the lithium salt is LiPF6 with a concentration of 10%. Additives are VEC, vinylene sulfate, fluorinated hydrocarbons, maleic acid esters, and maleimides, accounting for 10% of the total amount of the electrolyte.

[0032] 4. The positive and negative plates of the square aluminum shell lithium-ion battery are wound, wound core, welded cover plate, shelled, baked, laser welded, secondary baked, liquid injected, formed, pumped, pressed steel ball, Volumetric, high temperature aging at 45°C to 75°C for 120h-24h high temperature thermal film formation. The higher t...

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Abstract

The invention discloses a nickel-cobalt-manganese-lithium power battery and a manufacturing method thereof. A positive electrode active substance with the diameter 50 being 8-10 microns adopts nickel-cobalt-manganese-lithium, and a negative electrode adopts one or two of a middle-phase carbon microsphere, artificial graphite and composite graphite; a diaphragm adopts a three-layer composite diaphragm of which the surface is coated with Al<2-x>BxO3 (x=0.02-0.1), namely an Al<2-x>BxO3/PP/PE/PP high-security ceramic diaphragm, wherein B is one or several of alkaline-earth metal ions, rare earth metal ions and transitional metal ions; electrolyte consists of 25-30 percent of acid-containing vinyl ester, 5-10 percent of propylene carbonate (PC), 25-30 percent of fluorobenzene (FB) and 10-15 percent of diethyl carbonate (DEC); lithium salt is lithium hexafluorophate (LiPF6) with the concentration being 10-12 percent; an additive is vinylethylene carbonate (VEC), sulfuric acid and vinyl resin, fluorinated hydrocarbon, biphenyl, maleate and maleimide and accounts for 10 percent of the total amount of the electrolyte; positive and negative plates of a profile aluminum shell lithium ion battery are subjected to winding, core lapping, cover plate welding, feeding into a shell, baking, laser welding, secondary baking, liquid injection, formation, gas extraction, steel ball pressing, partial containing, high-temperature aging under 45-75 DEG C and high-temperature heating for 120 hours to 24 hours for film forming.

Description

technical field [0001] The invention relates to an energy storage power battery, in particular to a nickel-cobalt lithium manganese oxide ion energy storage power battery. Background technique [0002] Nickel-cobalt manganese oxide lithium-ion energy storage power battery has excellent performances such as low cost, high energy density, and long life. However, the safety performance of nickel-cobalt lithium manganese oxide lithium-ion power batteries needs to be improved to ensure the application requirements. Common ways to improve safety performance: improve the structure of the pole piece of the battery cell, and use high-safety materials. [0003] The surface of the positive electrode is coated to reduce the catalytic reaction between the electrolyte and the positive electrode under high temperature conditions. The surface of the positive electrode or the negative electrode is coated with an alumina-based electronic isolation and ion conduction ceramic coating. Use an...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/525H01M4/583H01M2/16H01M10/0567H01M50/434H01M50/457
CPCH01M10/0525H01M10/0587H01M50/403H01M50/446Y02E60/10
Inventor 朱冠华吴彬杰叶尚云张平伟万伟超王家涛罗开燕周京明涂雪菲易锦文李锡力符泽卫
Owner YUNNAN TIN GROUP HLDG
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