Lithium battery pole piece, lithium battery cell and preparation method of lithium battery pole piece

A lithium battery and pole piece technology is applied in the preparation of lithium battery cells and lithium battery pole pieces, and in the field of lithium battery pole pieces, and can solve the problems of high cost, complex equipment structure, and difficulty in battery stacking or assembly. , to achieve the effect of eliminating powder, simple equipment, and reducing the risk of puncturing the diaphragm

Pending Publication Date: 2022-05-27
BATTERO TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a preparation method for lithium battery pole pieces, lithium battery cells and lithium battery pole pieces, which is used to solve the problem of overhang during battery assembly in the prior art, Battery safety issues, difficulty in lamination or assembly, complex equipment structure, and high cost

Method used

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  • Lithium battery pole piece, lithium battery cell and preparation method of lithium battery pole piece
  • Lithium battery pole piece, lithium battery cell and preparation method of lithium battery pole piece
  • Lithium battery pole piece, lithium battery cell and preparation method of lithium battery pole piece

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preparation example Construction

[0063] The invention provides a novel preparation method of lithium battery pole piece, which adopts continuous direct coating to reduce the difficulty of coating, and adopts intermittent direct coating and split coating, which can greatly save electrode slurry, and the preparation process uses The equipment is simple, which greatly reduces the waste of pole pieces caused by rolling broken strips, slitting, die-cutting, wrinkling, etc., and greatly reduces the cost; in addition, a frame-shaped material ring is set on the periphery of the electrode coating, so that During slitting, it can avoid burrs on the pole piece and reduce the risk of burrs piercing the diaphragm; wrapping the electrode slurry in the frame-shaped material ring can greatly solve the risk of battery slurry powder dropping; the frame-shaped material ring has insulation As a result, the safety of lithium batteries is greatly improved; the assembly of lithium battery cells adopts different methods for stacking ...

Embodiment 1

[0097] This embodiment provides a preparation method of a lithium battery pole piece, the preparation method comprising the following steps:

[0098] S1. Refer to figure 1 As shown, a metal substrate 10 is provided, and electrode slurry and ceramic slurry are coated on both sides of the metal substrate 10 to form a frame-shaped bead 20 and an electrode coating 30 located in the frame-shaped bead 20 to obtain double-sided Coated pole piece; wherein, the electrode slurry and the ceramic slurry are coated on both sides of the metal substrate 10, specifically including the following steps: S11, directly coating the ceramic slurry along the horizontal continuity of the metal substrate 10 to form multiple A first ceramic edge 21; S12, intermittently directly coating ceramic slurry and electrode slurry along the longitudinal direction of the metal substrate 10 to form a plurality of second ceramic edges 22, and two second ceramic edges 22 adjacent to each other laterally Vertically ...

Embodiment 2

[0105] This embodiment provides a method for preparing lithium battery pole pieces. The difference between this preparation method and Embodiment 1 is that in step S1, refer to figure 2 As shown, when the electrode slurry and the ceramic slurry are coated on both sides of the metal substrate 10, the ceramic slurry is applied intermittently along the horizontal direction of the metal substrate 10 in step S11, and the ceramic slurry is directly applied along the vertical direction of the metal substrate 10 in S12. The ceramic slurry and the electrode slurry are applied intermittently directly, and the width of the formed first ceramic edge 21 and the second ceramic edge 22 is 5 mm, and the thickness of the first ceramic edge 21 and the second ceramic edge 22 is 10 μm. Other methods and steps are the same as those in Embodiment 1, and will not be repeated here.

[0106] This embodiment also provides a lithium battery pole piece. The lithium battery pole piece includes a positive...

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Abstract

The invention provides a lithium battery pole piece, a lithium battery cell and a preparation method of the lithium battery pole piece, the preparation method comprises the following steps: S1, providing a metal base material, coating electrode slurry and ceramic slurry on both sides of the metal base material to form a frame-shaped material ring and an electrode coating positioned in the frame-shaped material ring to obtain a double-sided coating pole piece; s2, rolling is conducted; s3, carrying out slitting and forming die cutting on the rolled double-sided coating pole piece, and cutting out a pole lug; s4, compounding the diaphragm with the double-sided coating pole piece with the tab; and S5, slicing the compounded pole piece to form the lithium battery pole piece. The positive plate and the negative plate prepared by the preparation method are assembled into a lithium battery cell. The equipment used in the invention is simple, the electrode slurry is saved, and the waste and cost of the pole piece are reduced; and due to the arrangement of the frame-shaped material rings, burrs are prevented from being generated on the pole pieces, the safety of the lithium battery is improved, the problem of overhang during battery assembly is prevented, and the difficulty of lamination assembly is reduced.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a preparation method of a lithium battery pole piece, a lithium battery cell and a lithium battery pole piece. Background technique [0002] In the lithium battery industry, the manufacturing process of lithium batteries is many and complicated, and each process of lithium battery production is very important. It is generally divided into electrode section, assembly section, and testing section. The electrode section includes slurry, coating, and baking. , rolling, slitting, die-cutting, etc. Among them, the coating process is very critical, and the coating effect has an important impact on battery capacity, internal resistance, cycle life and safety, so it is necessary to ensure uniform coating of the foil. The choice of coating method and control parameters have an important impact on the performance of lithium-ion batteries. If the drying temperature is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/13H01M4/04H01M4/06H01M4/08H01M6/14H01M10/052
CPCH01M4/139H01M4/0402H01M4/0435H01M4/13H01M4/06H01M4/08H01M6/14H01M10/052Y02P70/50
Inventor 张卫龙周中心刘朝阳
Owner BATTERO TECH CORP LTD
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