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Thermal conductive pole piece and preparation method and use thereof

A pole piece and thermally conductive coating technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, structural parts, etc., can solve problems such as affecting the heat dissipation effect of the pole piece, and achieve improved heat dissipation effect, strong manufacturability, and thermal conductivity. high effect

Pending Publication Date: 2019-10-08
东莞维科电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium-ion battery thermal conductor is arranged between the pole piece and the diaphragm, which affects the heat dissipation effect of the pole piece

Method used

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  • Thermal conductive pole piece and preparation method and use thereof
  • Thermal conductive pole piece and preparation method and use thereof
  • Thermal conductive pole piece and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A method for preparing a thermally conductive pole piece comprises the steps of:

[0071] (1) Mix 0.6g silane coupling agent, 0.6g epoxy resin and 100g NMP at 1200rmp for 2h, then add 2.2g multi-walled carbon nanotubes (length is 2μm, diameter is 10nm, aspect ratio is 200) Sand milling and mixing for 1 hour to obtain a thermally conductive slurry with a viscosity of 220mPa.s;

[0072] (2) The heat-conducting slurry is gravure-coated on both sides of the positive electrode sheet respectively, and the side with a positive active material coverage rate of 92% is designated as the A side, and the side with a positive active material coverage rate of 80% is designated as the B side, The thickness of the thermally conductive coating on side A is 1 μm, and the surface density is 0.08 mg / cm 2 , the thickness of the B-side thermally conductive coating is 1 μm, and the surface density is 0.08 mg / cm 2 , dried at 120°C, tape running speed at 1m / min, and cold pressed at 210T press...

Embodiment 2

[0074] The difference from Example 1 is that the multi-walled carbon nanotubes in step (1) are replaced by an equal amount of graphene, and the size of the graphene is 5 μm.

Embodiment 3

[0076] The difference from Example 1 is that the multi-walled carbon nanotubes in step (1) are replaced by an equal amount of graphene, and the size of the graphene is 1 μm.

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Abstract

The invention relates to a thermal conductive pole piece. The thermal conductive pole piece comprises a positive electrode pole piece and a heat conductive coating arranged on both sides of the positive electrode pole piece. According to the invention, thermal conductive slurry is coated on the surface of the pole piece of a battery and directly contacts the pole piece; after cold pressing, the thermal conductive layer and the pole piece are in close contact; through heat conduction, heat generated during the operation of the battery can be quickly sent out; after the pole piece is rolled, thethermal conductive layer and the battery pole piece are tightly combined without falling off, which is more safe and reliable; at the same time, without passing through the casing body of the batteryor an external cooling pipe and the like, the efficiency of heat conduction is more high; and mass production, automated production and high manufacturability can be realized.

Description

technical field [0001] The invention belongs to the technical field of battery preparation, and in particular relates to a thermally conductive pole piece, a preparation method and application thereof. Background technique [0002] As a chemical energy storage device, batteries are widely used in many fields such as digital products, energy storage equipment, electric tools and electric vehicles. As a chemical energy storage system, lithium-ion batteries will generate a lot of heat during charging and discharging, especially in the process of charging and discharging at a high rate, the heat generated will rise sharply. [0003] At present, in the field of electric vehicles or energy storage, multiple single batteries are generally connected in series or in parallel to form a battery pack for use, and the heat generated during the working process is even more immeasurable. If the heat cannot be exported in time, it will accumulate inside the battery, and the electrolyte ins...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139H01M10/0525H01M10/613H01M10/653
CPCH01M4/13H01M4/139H01M10/0525H01M10/613H01M10/653Y02E60/10
Inventor 吕黠物李掌权朱坤庆计阳庞佩佩夏小勇占克军
Owner 东莞维科电池有限公司
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