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Ternary high-magnification polymer lithium ion battery and manufacturing method thereof

A lithium-ion battery, polymer technology, applied in batteries, battery electrodes, secondary batteries, etc., can solve the problems of short cycle life, personal injury, poor safety performance, etc., to improve conductivity and capacity, good cycle performance, The effect of reducing the impedance value

Inactive Publication Date: 2020-04-24
华富(江苏)锂电新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional plant protection drones use lithium-ion batteries with lithium cobalt oxide as the positive electrode material. The price and cost of the positive electrode material are high, and this lithium-ion battery has defects such as short cycle life and poor safety performance in the application process. Use cost, even easy to cause personal injury

Method used

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  • Ternary high-magnification polymer lithium ion battery and manufacturing method thereof
  • Ternary high-magnification polymer lithium ion battery and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] a. Production of the positive electrode sheet: After stirring the ternary 111 material, conductive carbon black, single-walled carbon nanotubes and PVDF according to the mass ratio of 93.5:2:0.5:4, add NMP to prepare the positive electrode slurry, and then mix the positive electrode slurry The material is coated on the aluminum foil, followed by drying, rolling, and die-cutting to obtain a pole piece containing 1 tab, wherein the double-sided coating surface density of the positive pole piece is 280g / m2 during coating. 2 , when rolling, the compacted density of the positive electrode sheet is 3.25g / cm 3 .

[0031] B. the making of negative plate: the secondary broken carbon microspheres, conductive carbon black, PVDF, oxalic acid are mixed evenly according to the mass ratio of 93.7:2:4:0.3, add NMP to prepare the negative electrode slurry, the negative electrode slurry is coated to On the copper foil, it is dried in sequence, rolled at high temperature, and die-cut int...

Embodiment 2

[0035] a. Production of the positive electrode sheet: After stirring the ternary 111 material, conductive carbon black, single-walled carbon nanotubes and PVDF according to the mass ratio of 94:2:0.5:3.5, add NMP to prepare the positive electrode slurry, and then mix the positive electrode slurry coated on the aluminum foil, followed by drying, rolling, and die-cutting to obtain a pole piece containing 1 tab, wherein the double-sided coating surface density of the positive pole piece during coating is 270g / m 2 , when rolling, the compacted density of the positive electrode sheet is 3.30g / cm 3 .

[0036] b. Preparation of negative electrode sheet: Mix mesophase carbon microspheres, conductive carbon black, PVDF, and oxalic acid evenly according to the mass ratio of 93.7:1:5:0.3, add NMP to prepare negative electrode slurry, and apply the negative electrode slurry to copper Foil, sequentially dried, high-temperature rolling, die-cutting into sheets to obtain a negative electrod...

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Abstract

The invention discloses a ternary high-magnification polymer lithium ion battery and a manufacturing method thereof. The ternary high-magnification polymer lithium ion battery comprises a positive plate, a negative plate and a shell. The positive plate and the negative plate are stacked. The negative plate is laid firstly. A diaphragm is arranged between the adjacent positive plate and negative plate. The stacked positive plate and negative plate are placed in the shell, and electrolyte is arranged in the shell. The manufacturing method of the ternary high-magnification polymer lithium ion battery comprises the steps of 1 manufacturing the positive electrode; 2 manufacturing the negative electrode; 3 assembling the battery; and 4 forming and grading the battery. Compared with a traditionallithium cobalt oxide lithium ion battery which adopts a ternary material as a positive electrode material, the ternary high-magnification polymer lithium ion battery provided by the invention has theadvantages that the impedance value is reduced; the conductivity and the capacity are improved; the material cost is reduced; the rate capability is good; the cycle performance is good; and the safety is good.

Description

technical field [0001] The invention relates to a ternary high-rate polymer lithium-ion battery and a manufacturing method thereof, belonging to the technical field of lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high energy density and good rate performance, and have been widely used in agricultural plant protection drones to improve the spraying efficiency of pesticides. As a tool for spraying pesticides, plant protection drones have flight time and service life that are the focus of everyone's attention, and these aspects mainly depend on the performance of high-rate batteries, focusing on energy density, rate performance, cycle performance, safety performance, etc. aspect. [0003] Traditional plant protection drones use lithium-ion batteries with lithium cobalt oxide as the positive electrode material. The price and cost of the positive electrode material are high, and this lithium-ion battery has defects such as sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525H01M10/0585
CPCH01M4/505H01M4/525H01M10/0525H01M10/0585H01M2220/20Y02E60/10Y02P70/50
Inventor 王大林姜庆海吴战宇朱明海施晓渝
Owner 华富(江苏)锂电新技术有限公司
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