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Graphene heating film suitable for power cell bag and graphite alkene heating film assembly

A technology of ene heating film and graphene, which is applied in the direction of heating element materials, ohmic resistance heating, electrical components, etc., can solve the problems of heat resistance, wear resistance, moisture resistance and safety, the heating circuit does not have good flexibility, Large radiation heat loss and other problems, to achieve the effect of soft texture, fast heating speed, high electric heating efficiency

Pending Publication Date: 2018-05-29
SHENZHEN HOVERBIRD ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high resistance of the heating film, it needs a very high voltage to achieve the heating effect, and the radiation heat loss is very large, and the heating circuit does not have good flexibility, and it is easy to break the circuit during the bending process. poor security

Method used

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  • Graphene heating film suitable for power cell bag and graphite alkene heating film assembly
  • Graphene heating film suitable for power cell bag and graphite alkene heating film assembly
  • Graphene heating film suitable for power cell bag and graphite alkene heating film assembly

Examples

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preparation example Construction

[0040] (II) the preparation method of this graphene conductive paste

[0041] The preparation method of this graphene conductive paste comprises the following steps:

[0042] Epoxy functionalization of graphene powder: epoxy functionalization of graphene powder with epoxy resin, wherein the weight ratio of the epoxy resin to the graphene powder is 1:4-3:1;

[0043] Epoxy modification of siloxane: modify siloxane with epoxy resin, wherein the weight ratio of the epoxy resin to the siloxane is 1:3-2:1;

[0044] Mixing: 1-10 parts by weight of the surface-functionalized graphene powder, 2-6 parts by weight of the epoxy-modified siloxane, 4-15 parts by weight of the epoxy resin, and epoxy reactive diluent 2-6 parts by weight and 0.1-0.8 parts by weight of latent curing agent are subjected to low-speed dispersion stirring, high-speed dispersion stirring, and vacuum defoaming to prepare the graphene conductive paste.

[0045] Preferably, the epoxy resin is an epoxy resin with a π ...

preparation example 1

[0055] In this preparation example, the epoxy resin for epoxy functionalization of graphene, the epoxy resin for epoxy modification of siloxane and the epoxy resin as one of the main components of graphene conductive paste are all used Bisphenol A type epoxy resin. The bisphenol A epoxy resin was purchased from Shenzhen Jiadida Chemical Co., Ltd., and the model was NPEL-128E.

[0056] Add 2g of graphene powder (highly conductive graphene powder prepared by Shenzhen Shiwang New Material Technology Co., Ltd.), 3.5g of bisphenol A epoxy resin and 200g of absolute ethanol into the medium and high-speed rotating chamber testing machine middle. The high-speed rotating cavity testing machine is equipped with an ultrasonic generator and a heating constant temperature device. The mixture is rotated at 20-120°C, 1600rpm at high speed and 2000W, frequency 80KHz ultrasonic waves are shaken for 1-8h for 1-8 hours, then vacuum filtered and dried at a temperature lower than 50°C, and the s...

preparation example 2

[0060] In this preparation example, the epoxy resin for epoxy functionalization of graphene, the epoxy resin for epoxy modification of siloxane and the epoxy resin as one of the main components of graphene conductive paste are all used Bisphenol F type epoxy resin replaces the bisphenol A type epoxy resin in Preparation Example 1, and the rest are the same as Preparation Example 1. The bisphenol F epoxy resin was purchased from Shenzhen Jiadida Chemical Co., Ltd., and the model was NPEF-170. Preparation example 3

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Abstract

The invention discloses a graphene heating film and a grapheme heating film assembly. The graphene heating film comprises an organic polymer base film and a heating line disposed on at least one surface of the organic polymer base film. The heating line is formed by applying grapheme conductive slurry to at least one surface and conducting solidification. The graphene heating film assembly is composed of the graphene heating film, a thermal conductive silicone, a graphene heat conductive piece, the organic polymer insulation film and a temperature sensor. The graphene heating film assembly isadvantageous in that the high conductivity, high thermal conductivity, high mechanical strength and high flexibility of the grapheme can be utilized; heating voltage is low, heating speed is fast, electro-thermal efficiency is high, heating surface is even, no redness or hotness exists, winding performance is good, quality is soft, light and thin, and conformity is good; teat source can be provided for the power cell bag, and the influence of low-temperature charging and discharging on cell performance can be resolved.

Description

technical field [0001] The present application relates to the technical field of graphene and the technical field of heating components, in particular to a graphene heating film and a graphene heating film assembly, especially a graphene heating film and a graphene heating film assembly suitable for power battery packs. Background technique [0002] At present, the obvious feature of electric vehicle power battery charging at low temperature is that the voltage rises rapidly. Charging at low temperature will cause the positive electrode lithium to fall off quickly and the negative electrode lithium insertion speed to be slow, resulting in the accumulation of lithium metal on the electrode surface to form dendrites, which are easy to break through the battery. separator, shorting the battery and posing a safety hazard. Therefore, under low temperature conditions, the power battery should be heated so that the battery can be charged and discharged at room temperature (20-30°C)...

Claims

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Application Information

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IPC IPC(8): H05B3/34H05B3/10C09D11/52C09D11/102C09D11/03H01M10/615H01M10/625H01M10/653H01M10/6571
CPCH01M10/615H01M10/625H01M10/653H01M10/6571H05B3/10H05B3/34C09D11/03C09D11/102C09D11/52Y02P20/10Y02E60/10Y02B30/00
Inventor 刘斌王田军黄小华杜野吴菲罗平
Owner SHENZHEN HOVERBIRD ELECTRONICS TECH CO LTD
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