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Electrode sheet and manufacturing method thereof

A pole piece and current collector technology, applied in the pole piece and its manufacturing field, can solve problems that cannot be completely solved, achieve the effects of improving consistency, avoiding local excessive charge and discharge, increasing cycle life and energy conversion efficiency

Inactive Publication Date: 2016-02-10
MICROVAST POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This invention facilitates the movement of lithium ions and alleviates the problem of pole piece consistency to a certain extent, but it cannot completely solve this problem

Method used

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  • Electrode sheet and manufacturing method thereof
  • Electrode sheet and manufacturing method thereof
  • Electrode sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, this embodiment provides a pole piece, including a current collector layer and a slurry layer, the slurry layer is coated on the current collector layer, and small holes are distributed through the current collector layer, and the small holes are arranged parallel to the current collector layer. The columns of the sides of the fluid layer and the rows perpendicular to the sides of the current collector layer are distributed in three adjacent different rows and three adjacent different columns. The center of the four small holes is connected to form an equilateral quadrilateral, and the small holes can make The slurry particles with a diameter of 0.1mm pass through, and the four small holes distributed in three adjacent different rows and three adjacent different columns are connected at the center to form an equilateral quadrilateral with a side length of 0.5mm, distributed in two phases The quadrangle formed by connecting the centers of four ...

Embodiment 2

[0034] Such as figure 1 As shown, this embodiment provides a pole piece, including a current collector layer and a slurry layer, the slurry layer is coated on the current collector layer, and small holes are distributed through the current collector layer, and the small holes are arranged parallel to the current collector layer. The columns of the sides of the fluid layer and the rows perpendicular to the sides of the current collector layer are distributed in three adjacent different rows and three adjacent different columns. The center of the four small holes is connected to form an equilateral quadrilateral, and the small holes can make The slurry particles with a diameter of 0.15mm pass through, and the four small holes distributed in three adjacent different rows and three adjacent different columns are connected at the center to form an equilateral quadrilateral with a side length of 0.5mm, distributed in two phases The quadrilateral formed by connecting the centers of f...

Embodiment 3

[0036] Such as figure 2 As shown, this embodiment provides a pole piece, including a current collector layer and a slurry layer, the slurry layer is coated on the current collector layer, and small holes are distributed through the current collector layer, and the small holes are arranged parallel to the current collector layer. The columns of the sides of the fluid layer and the rows perpendicular to the sides of the current collector layer are distributed in three adjacent different rows and three adjacent different columns. The center of the four small holes is connected to form an equilateral quadrilateral, and the small holes can make The slurry particles with a diameter of 0.1mm pass through, and the four small holes distributed in three adjacent different rows and three adjacent different columns are connected at the center to form an equilateral quadrilateral with a side length of 0.5mm, distributed in two phases The quadrangle formed by connecting the centers of four...

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Abstract

The present invention provides an electrode sheet and a manufacturing method thereof. The electrode sheet comprises a current collector layer and a slurry layer, wherein the slurry layer is coated on the current collector layer, small through holes are distributed on the current collector layer. The electrode sheet is characterized in that the small through holes are arranged into the column parallel to the edge of the current collector layer and the row perpendicular to the edge of the current collector layer, and the centers of the four small through holes distributed on different adjacent three rows and different adjacent three columns are connected to form an equilateral quadrangle. With the technical scheme of the present invention, the uniformity of the slurry on the current collector layer is increased, the active material can be automatically balance through the small holes, the uniformity is improved, and the local excess charge and discharge is avoided so as to improve the safety performance; and the rate performance, the cycle life and the energy conversion efficiency of the battery are improved.

Description

technical field [0001] The invention discloses a pole piece for a lithium ion battery and a manufacturing method thereof. Background technique [0002] Lithium-ion battery is a kind of high energy density, high average output voltage, large output power, small self-discharge, no memory effect, wide operating temperature range (-20℃~60℃), excellent cycle performance, fast charge and discharge, Green battery with high charging and discharging efficiency, long service life and no pollution to the environment. It relies on the reciprocal intercalation and deintercalation of lithium ions between the positive and negative electrodes to complete the charging and discharging of the battery. [0003] In order to further increase the energy density of lithium-ion batteries, by adopting thinner current collectors and diaphragms, increasing the thickness of the coating layer, increasing the content of active materials in the pole piece, and increasing the compaction density of the pole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139
CPCY02E60/10
Inventor 邓国友
Owner MICROVAST POWER SYST CO LTD
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