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Battery positive plate and manufacturing method thereof, and lithium ion battery and manufacturing method thereof

A battery positive electrode and battery negative electrode technology, which is applied in the manufacture of lithium-ion batteries and in the field of lithium-ion batteries, can solve the problems of small capacity of lithium-ion batteries, and achieve the effects of outstanding rate performance, improved adhesion, and long cycle life

Inactive Publication Date: 2019-02-15
SHENZHEN ZHUONENG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to provide a battery positive plate, which aims to solve the technical problem of low capacity of existing lithium-ion batteries

Method used

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  • Battery positive plate and manufacturing method thereof, and lithium ion battery and manufacturing method thereof
  • Battery positive plate and manufacturing method thereof, and lithium ion battery and manufacturing method thereof
  • Battery positive plate and manufacturing method thereof, and lithium ion battery and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0128] The preparation of the battery negative plate 3: first mix the suspending agent CMC dry powder and deionized water with a weight percentage of 2.0%wt to make a suspension agent glue with a solid content of 2.0%, and add graphite powder, 1.0% graphite powder, 1.0% by weight % conductive graphite and 2.0% SBR were mixed, then deionized water was added and mixed evenly to prepare a negative electrode slurry with a solid content of 50%. The negative electrode slurry is gap-coated on a metal copper foil with a thickness of 8 μm, dried at a temperature of 100-130 ° C, and then rolled into a second sheet with a thickness of about 130 μm. The design compaction density of the second sheet is Not higher than 1.7g / cm 3 , cut into long strips, the width of the cut piece is 96 mm, and the negative electrode tab 31 is welded at the gap foil to make the negative electrode sheet 3 of the battery.

[0129] The preparation of battery positive electrode sheet 1: first mix the binder PVDF...

Embodiment 2

[0133] The preparation of the battery negative plate 3: first mix the suspending agent CMC dry powder and deionized water with a weight percentage of 2.2%wt to make a suspending agent glue with a solid content of 2.0%, and add a weight percentage of 94.8% graphite powder, 0.8 % conductive graphite and 2.2% SBR were mixed, then deionized water was added and mixed evenly to prepare negative electrode slurry with a solid content of 50%. The negative electrode slurry is gap-coated on a metal copper foil with a thickness of 8 μm. After drying at a temperature of 100-130° C., it is rolled into a second sheet with a thickness of about 126 μm. The design compaction density of the second sheet is not Higher than 1.7g / cm 3 . The second sheet was cut into long strips with a width of 96 mm, and the negative tab 31 was welded to the gap foil to make the battery negative sheet 3 .

[0134] The preparation of battery positive electrode sheet 1: first mix the binder PVDF dry powder of 2.1%w...

Embodiment 3

[0138] The preparation of the battery negative plate 3: first mix the suspending agent CMC dry powder and deionized water with a weight percentage of 2.4%wt to make a suspending agent glue with a solid content of 2.0%, and add a weight percentage of 94.5% graphite powder, 0.9 % conductive graphite and 2.2% SBR were mixed, then deionized water was added and mixed evenly to prepare negative electrode slurry with a solid content of 50%. The negative electrode slurry is gap-coated on a metal copper foil with a thickness of 8 μm. After drying at a temperature of 100-130° C., it is rolled into a second sheet with a thickness of about 123 μm. The design compaction density of the second sheet is not Higher than 1.7g / cm 3 . The second sheet was cut into long strips with a width of 96 mm, and the negative tab 31 was welded to the gap foil to make the battery negative sheet 3 .

[0139] The preparation of battery positive sheet 1: first mix the binder PVDF dry powder of 2.3%wt by weigh...

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Abstract

The invention is applicable to the field of batteries and discloses a battery positive plate, a manufacturing method of the battery positive plate, a lithium ion battery and a manufacturing method ofthe lithium ion battery. The width of the battery positive plate is 94.5+ / -5mm; the battery positive plate comprises a positive metal substrate, a positive lug conductively connected with the positivemetal substrate, and a positive coating coated outside the positive metal substrate, wherein the positive coating comprises the following components in parts by weight: 80.0-98.6% of a positive active material, 1.0-7.0% of a positive adhesive, and 0.4-16.0% of a positive conductive agent; and the positive active material is at least one of lithium cobaltate, lithium manganate, nickel-cobalt lithium manganate and lithium iron phosphate, and the positive conductive agent comprises at least one of a granular positive conductive agent and a fibrous positive conductive agent. In the invention, thecapacity of the lithium ion battery reaches 3350mAh, and the lithium ion battery also has the advantages of long cycle life, outstanding rate capability and reliable safety performance.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery positive electrode sheet, a method for manufacturing the battery positive electrode sheet, a lithium ion battery with the battery positive electrode sheet, and a manufacturing method for the lithium ion battery. Background technique [0002] From the production of lithium-ion batteries to their application in electronic products, there is a core link in the middle-packaging (PACK). No matter what type of lithium-ion battery cells, they must be packaged into groups and passed the inspection before they can be finally used in electronic products. With the continuous development of the lithium-ion battery industry, 18650 lithium-ion batteries (battery diameter 18mm, height 65mm) have become the preferred model in the field of battery packaging due to their standardized size and flexible grouping methods. In the prior art, the width of the positive plate of the 18650-type lithium-...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/131H01M4/139H01M4/1391H01M10/0525H01M10/058
CPCH01M4/13H01M4/131H01M4/139H01M4/1391H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 黄国文李亮欧瑞先赖日旺
Owner SHENZHEN ZHUONENG NEW ENERGY TECH
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