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Lithium ion battery pole piece coated with ceramic paste and preparation process thereof

A lithium-ion battery and ceramic slurry technology, which is applied in electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve problems such as easy generation of burrs, easy puncture of batteries, and increased defect rate in assembly processes, and achieve reduction Effects of internal short-circuit rate, improvement of safety performance, and reduction of probability of glitches

Inactive Publication Date: 2018-02-09
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is prone to burrs in the process of laser cutting the tabs, so that the pole pieces are easy to pierce or scratch the diaphragm during the winding and assembly process, resulting in an internal short circuit of the battery, which greatly increases the defective rate of the assembly process.

Method used

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  • Lithium ion battery pole piece coated with ceramic paste and preparation process thereof

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Effect test

Embodiment 1

[0027] A lithium-ion battery pole piece coated with ceramic slurry, comprising a positive / negative current collector, a positive / negative active material coating and a positive / negative ceramic slurry coating coated on the surface of the positive / negative current collector, The positive / negative electrode ceramic slurry coating is coated on the side of the positive / negative electrode active material coating.

[0028] The preparation process of the lithium-ion battery pole piece coated with ceramic slurry comprises the following steps:

[0029] S1, coating the positive / negative electrode active material on the surface of the positive / negative electrode current collector;

[0030] S2. Coating the positive / negative electrode ceramic slurry on the side of the positive / negative electrode active material coating, and drying to obtain the positive / negative electrode sheet of the lithium ion battery.

Embodiment 2

[0032] A lithium-ion battery pole piece coated with ceramic slurry, comprising a positive / negative current collector, a positive / negative active material coating and a positive / negative ceramic slurry coating coated on the surface of the positive / negative current collector, The positive / negative electrode ceramic slurry coating is coated on the side of the positive / negative electrode active material coating;

[0033] Wherein, the width of the positive / negative electrode ceramic slurry coating is 3 mm.

[0034] The preparation process of the lithium-ion battery pole piece coated with ceramic slurry comprises the following steps:

[0035] S1, coating the positive / negative electrode active material on the surface of the positive / negative electrode current collector;

[0036] S2. Apply the positive / negative electrode ceramic slurry to the side of the positive / negative electrode active material coating, and dry to obtain the positive / negative electrode sheet of the lithium ion bat...

Embodiment 3

[0039] A lithium-ion battery pole piece coated with ceramic slurry, comprising a positive / negative electrode current collector, a positive / negative electrode active material coating and a positive / negative electrode ceramic slurry coating coated on the surface of the positive / negative electrode current collector, The positive / negative electrode ceramic slurry coating is coated on the side of the positive / negative electrode active material coating;

[0040] Wherein, the width of the positive / negative electrode ceramic slurry coating is 6mm;

[0041] The positive electrode ceramic slurry includes the following raw materials in parts by weight: 40 parts of nano-sized alumina, 10 parts of the first binder, and 60 parts of the first solvent;

[0042] The negative electrode ceramic slurry includes the following raw materials in parts by weight: 40 parts of nano-sized alumina, 10 parts of a second binder, 0.1 part of a dispersant, and 60 parts of a second solvent;

[0043] The secon...

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Abstract

The present invention discloses a lithium ion battery pole piece coated with a ceramic paste. The battery pole piece comprises a positive / negative electrode current collector, a positive / negative electrode active material coating layer and a positive / negative electrode ceramic paste coating layer coating on the surface of the positive / negative electrode current collector. The positive / negative electrode ceramic paste coating layer coats the side part of the positive / negative electrode active material coating layer. The present invention also discloses a preparation process of the lithium ion battery pole piece coated with the ceramic paste. According to the lithium ion battery pole piece coated with the ceramic paste, the side part of the positive / negative electrode active material coatinglayer is coated with the positive / negative electrode ceramic paste, so that the probability of generating burrs in the process of laser cutting polar ears is reduced, the phenomenon that the generated burrs pierce or scratch diaphragms is prevented, the rate of battery internal short circuit is reduced, and thus the safety performance is improved when the lithium ion battery is used.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery manufacturing, in particular to a lithium ion battery pole piece coated with ceramic slurry and a preparation process thereof. Background technique [0002] At present, in the existing lithium-ion battery manufacturing technology, the positive / negative electrode sheets often use aluminum foil or carbon-coated aluminum foil or copper foil as the current collector, and the positive / negative electrode slurry is coated on the current collector by transfer coating or spray coating. , and then dried and laser cut tabs to prepare positive / negative pole pieces. This method is prone to burrs in the process of laser cutting the tabs, which makes it easy for the pole pieces to pierce or scratch the diaphragm during the winding and assembly process, resulting in an internal short circuit of the battery, which greatly increases the defective rate of the assembly process. Contents of the invention...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139H01M4/04H01M4/62H01M10/0525H01M10/42
CPCH01M4/0404H01M4/0409H01M4/0411H01M4/0471H01M4/13H01M4/139H01M4/628H01M10/0525H01M10/4235Y02E60/10
Inventor 王珉云
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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