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A kind of positive plate and battery

A positive electrode sheet and battery technology, applied in the direction of positive electrodes, battery electrodes, secondary batteries, etc., can solve the problems of low battery safety, increase the heat dissipation area, avoid the instability of the electrochemical system, and improve the safety effect

Active Publication Date: 2021-11-26
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a positive electrode sheet and a battery to solve the problem of low battery safety in the prior art

Method used

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  • A kind of positive plate and battery
  • A kind of positive plate and battery
  • A kind of positive plate and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment provides a lithium ion battery that reduces temperature rise and increase life cycle, the specific method is:

[0057] The mixture consisting of 97.8% lithium cobaltate, 1.1% conductive agent and 1.1% binder, is uniformly dispersed in N-methylpyrrolidone (NMP) solvent to form a positive slurry Pa; In the coater, coating, the coating method includes an extruded coating, a transfer coating, a roll coating coating, a vacuum foil having a laser cleaning width of PW2 for the coated die Regionally, a slurry Pb made of a ratio of 85% ceramic powder, 10% inorganic ionic material and 5% binder is applied to obtain a positive electrode plate; 96.5% graphite, 0.5% conductivity agent and A mixture of 3% adhesive composition is uniformly dispersed in an NMP solvent to prepare a negative slurry Na; the slurry Na is placed in a coater, and the coating is carried out, the coating method comprises extrusion coating, One type of transfer coating, roll coating coating, a vacuu...

Embodiment 2

[0060] A lithium-ion battery that reduces temperature rise and increase the life cycle, the difference from Example 1 is that the ceramic particle diameter is 25 microns.

Embodiment 3

[0062] A lithium ion battery that reduces temperature rise and increases life cycle, the difference from Example 1 is that the ceramic particle diameter is 30 microns.

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Abstract

The present invention provides a positive electrode sheet and a battery, wherein the positive electrode sheet includes a positive electrode current collector, and one or both sides of the positive electrode current collector are coated with a first coating area, a second coating area and a third coating area , the first coating area, the second coating area and the third coating area are distributed along a first direction, the first direction is the length direction of the positive electrode current collector; in the width direction of the positive electrode current collector above, the second coating area is located between the first coating area and the third coating area; the first coating area and the third coating area are coated with a positive electrode active material layer , the second coating area is coated with a porous material layer, the pore size of the porous material layer is greater than 50 nm, and the porosity is greater than 30%. The embodiments of the present invention can improve the safety of the battery.

Description

Technical field [0001] The present invention relates to the field of battery technology, and more particularly to a positive electrode sheet and a battery. Background technique [0002] Today, lithium-ion batteries are widely used in all walks of life. Consumer electronics's service life and fast charge ability for lithium secondary batteries are getting higher and higher. In order to meet customer needs, the larger the capacity of the lithium-ion battery is, the charging magnification is constantly increasing. [0003] In the prior art, the electrical and negative electrode active material between the pole sheets is generally required to apply a layer of active material, a positive electrode sheet and a positive electrode active material of the positive and negative electrode active material of the pole. However, when the battery capacity is increased and the charging magnification increases, it is easy to cause the temperature of the lithium-ion battery to rise during charge an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/74H01M10/0525H01M4/02
CPCH01M4/742H01M10/0525H01M4/0404H01M2004/028H01M2004/021Y02E60/10H01M4/366H01M2004/027
Inventor 李根宗彭冲
Owner ZHUHAI COSMX BATTERY CO LTD
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