CN114899532A - Composite gasket for battery thermal management and preparation method thereof - Google Patents

Composite gasket for battery thermal management and preparation method thereof Download PDF

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Publication number
CN114899532A
CN114899532A CN202210678788.6A CN202210678788A CN114899532A CN 114899532 A CN114899532 A CN 114899532A CN 202210678788 A CN202210678788 A CN 202210678788A CN 114899532 A CN114899532 A CN 114899532A
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electrode layer
heat
battery
layer
composite gasket
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李涅
陈良伟
陈志斌
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Yundi New Energy Technology Suzhou Co ltd
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Yundi New Energy Technology Suzhou Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/145—Carbon only, e.g. carbon black, graphite
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention discloses a composite gasket for battery heat management and a preparation method thereof, and provides the following technical scheme aiming at the problems of complex structure and high implementation cost of the conventional battery heat management system. The preparation method comprises the following steps: s1, preparing a graphene network, S2, preparing a functional layer, S3, and S4, preparing a composite gasket. The composite gasket provided by the invention has the functions of heat conduction, heat storage and heating, meets the requirements of the power battery on heat management under different working conditions, and is simple in preparation method and low in manufacturing cost.

Description

Composite gasket for battery thermal management and preparation method thereof
Technical Field
The invention relates to the field of battery thermal management, in particular to a composite gasket for battery thermal management and a preparation method thereof.
Background
The battery thermal management is a new technology which is based on the influence of temperature on the battery performance, combines the electrochemical characteristics and the heat production mechanism of the battery, is based on the optimal charging and discharging temperature interval of the specific battery, is established on the basis of multiple disciplines and fields of materials science, electrochemistry, heat transfer science, molecular dynamics and the like through reasonable design, and aims to solve the problem of heat dissipation or thermal runaway caused by the fact that the battery works under the condition of overhigh or overlow temperature so as to improve the overall performance of the battery.
Currently, chinese patent publication No. CN107415717B discloses a battery thermal management system that includes a battery pack, a coolant subsystem including a cooler configured to cool the battery pack, and a refrigerant subsystem including at least one evaporator. The coolant subsystem is disposed in heat exchange relationship with the refrigerant subsystem within the chiller. A tap line extends from the at least one evaporator to the cooler.
Although the battery thermal management system can efficiently dissipate or heat the battery, the system has a complex structure and high manufacturing cost, so that the product adopting the system is high in selling price, and the sales volume of the product is not facilitated. Accordingly, there is room for improvement in such battery thermal management systems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the composite gasket for battery thermal management and the preparation method thereof, and the composite gasket has the advantages of being suitable for various working environments and working conditions of batteries and greatly simplifying a heat dissipation system of a power battery.
In order to achieve the purpose, the invention provides the following technical scheme:
a composite gasket for battery thermal management, comprising:
the functional layer is used for providing heat conduction, heat storage and heating functions;
the first electrode layer is arranged on the upper surface of the functional layer and used for providing electric conduction and heat conduction functions;
the second electrode layer is arranged on the lower surface of the functional layer and used for providing electric conduction and heat conduction functions;
the first heat-conducting adhesive layer is arranged on one surface, far away from the functional layer, of the first electrode layer, is formed by curing insulating heat-conducting adhesive during installation, and is used for providing heat conduction, insulation and functions;
the second heat-conducting adhesive layer is arranged on one surface, far away from the functional layer, of the second electrode layer, is formed by curing insulating heat-conducting adhesive during installation, and is used for providing heat conduction, insulation and functions;
the functional layer is a compound of graphene and a phase change heat storage material which are distributed in a network shape, and the thickness of the functional layer is 20-2000 mu m.
By adopting the technical scheme, the external circuit supplies power to the composite gasket, and the graphene network in the functional layer of the composite gasket is electrified to generate heat, so that the effect of heating the battery is achieved, and the battery reaches the optimal working temperature; the battery can instantly generate a large amount of heat under the instantaneous large-current working condition, the heat is conducted to the functional layer of the composite gasket through the first electrode layer and the second electrode layer, and the phase-change heat storage material in the functional layer can absorb the heat to prevent the battery from being instantly overheated; the graphene network, the first electrode layer and the second electrode layer in the functional layer can provide good heat conduction channels, so that the phase-change material can absorb heat fully; the battery continuously generates heat in a continuous working state, the generated heat can be transversely conducted through the first electrode layer, the functional layer and the second electrode layer, the heat is conducted to an external heat dissipation channel, and the battery is prevented from being overheated. The graphene network, the first electrode layer and the second electrode layer in the functional layer can provide good heat conducting channels.
Furthermore, the thickness of the first electrode layer and the second electrode layer is 10-50 μm.
Further, the thickness of the first heat-conducting adhesive layer and the thickness of the second heat-conducting adhesive layer are both 100-1000 microns.
Further, the phase change heat storage material includes, but is not limited to, a mixture of one or more of a hydrated salt phase change material, a high molecular phase change material and a paraffin phase change material.
By adopting the technical scheme, the phase change heat storage materials have good heat absorption and heat storage effects, are low in price, and contribute to reducing the cost while not influencing the heat management effect of the composite gasket.
Furthermore, the first electrode layer and the second electrode layer are made of metal with good electric and thermal conductivity.
By adopting the technical scheme, the first electrode layer and the second electrode layer are made of metal with good electric and thermal conductivity, so that the electric conduction and thermal conduction effects of the electrode layers can be guaranteed.
Further, the form of the material of the first electrode layer and the second electrode layer is selected from one or more of a combination of a metal foil, a metal mesh, a metal tape, a metal wire, and a metal wire braid.
By adopting the technical scheme, the flexibility of the electrode layer can be ensured, the composite gasket is more convenient to mount, and the composite gasket is favorably combined with a power battery.
Furthermore, the first heat-conducting adhesive layer and the second heat-conducting adhesive layer both adopt silicone adhesives.
By adopting the technical scheme, the silicone adhesive has excellent heat conduction and insulation effects after being cured, and the heat conduction adhesive layer has excellent elasticity after being cured, can cope with collision to a certain degree, and is beneficial to protecting the power battery wrapped by the silicone adhesive.
A method of making a composite gasket for battery thermal management, comprising the steps of:
s1, preparing a graphene network: mixing graphene, a carbon-forming polymer and a foaming agent, foaming, drying, and carbonizing at 800-2000 ℃ for 0.5-4 h to obtain a graphene network;
s2, preparing a functional layer: heating the phase-change material to a molten state, injecting the phase-change material into the graphene network, cooling, and then cutting and rolling to obtain a functional layer;
s3, preparing an electrode layer: rolling the material of the electrode layer into a sheet to obtain a first electrode layer and a second electrode layer;
s4, preparing a composite gasket: and (3) carrying out hot rolling on the functional layer prepared in the step (S2), the first electrode layer prepared in the step (S3) and the second electrode layer at the temperature of 60-120 ℃ to obtain the composite gasket.
Further, graphene in S1: carbon-forming polymer: the foaming agent has a weight ratio (0.1-1): 1:0.1.
Further, the carbon-forming polymer is selected from one or a mixture of polyvinyl alcohol, polyurethane, polyimide, polymethyl methacrylate and polyvinyl chloride.
By adopting the technical scheme, the preparation method has fewer steps and the price of the adopted materials is lower, so that the production cost can be reduced, and the economic benefit can be improved.
In conclusion, the invention has the following beneficial effects:
1. the composite gasket provided by the invention can absorb heat generated by the power battery during working, so that the battery reaches the optimal working temperature;
2. the composite gasket provided by the invention can heat the power battery at a lower temperature, so that the battery reaches the optimal working temperature;
3. the preparation method provided by the invention has fewer steps, the cost of the selected raw materials is lower, the production cost can be effectively reduced, and the economic benefit is improved.
Drawings
Fig. 1 is a schematic diagram of a composite gasket for battery thermal management according to the present invention.
In the figure: 1. a functional layer; 2. a first electrode layer; 3. a second electrode layer; 4. a first heat-conducting adhesive layer; 5. a second heat-conducting adhesive layer; 6. a first conductive line; 8. a second conductive line; 9. a power source.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1
A composite gasket for battery thermal management is shown in figure 1 and comprises a functional layer 1, wherein the functional layer 1 is a composite of graphene and phase-change thermal storage paraffin which are distributed in a network shape, and the thickness of the functional layer 1 is 20 microns. The upper surface of the functional layer 1 is fixedly provided with a first electrode layer 2, the lower surface of the functional layer 1 is fixedly provided with a second electrode layer 3, and the thicknesses of the first electrode layer 2 and the second electrode layer 3 are both 10 micrometers. The side of the first electrode layer 2, which is far away from the functional layer 1, is provided with a first heat-conducting adhesive layer 4, the side of the second electrode layer 3, which is far away from the functional layer 1, is provided with a second heat-conducting adhesive layer 5, and the thicknesses of the first heat-conducting adhesive layer 4 and the second heat-conducting adhesive layer 5 are both 100 micrometers.
Specifically, the first electrode layer 2 and the second electrode layer 3 are flexible copper sheets formed by weaving and rolling copper wires. The first heat-conducting adhesive layer 4 and the second heat-conducting adhesive layer 5 are elastic insulating heat-conducting layers formed by curing silicone adhesives.
Referring to fig. 1, the composite gasket may be mounted at the bottom or the side of the battery during mounting, and is tightly attached to the battery through the thermal conductive adhesive layer, the first wire 6 and the second wire 8 are respectively connected to the first electrode layer 2 and the second electrode layer 3, and the first wire 6 and the second wire 8 are electrically connected to an external power supply 9.
The preparation method of the composite gasket for battery thermal management comprises the following steps:
s1, preparing a graphene network: mixing 0.1 part by weight of graphene, 1 part by weight of polyurethane and 0.1 part by weight of foaming agent, foaming, drying to obtain graphene carbon-forming polymer composite foam, drying at the temperature of 80 ℃, and carbonizing at the temperature of 1200 ℃ for 2 hours to obtain a graphene network.
S2, preparing a functional layer 1: and heating the phase change heat storage material to a high enough temperature to melt the phase change heat storage material, pouring the phase change heat storage material into the graphene network, and cooling and shaping the graphene network to obtain the graphene network composite phase change heat storage material. And then cutting and rolling the graphene network composite phase change heat storage material to obtain a sheet with the thickness of 20 microns, so as to obtain the functional layer 1.
S3, preparing an electrode layer: the copper wires are woven into a net shape, rolled into a sheet with the thickness of 10 mu m, and then cut to obtain the first electrode layer 2 and the second electrode layer 3.
S4, preparing a composite gasket: and (3) carrying out hot rolling on the functional layer 1 prepared in the step S2 and the first electrode layer 2 and the second electrode layer 3 prepared in the step S3 at the temperature of 70 ℃ to obtain the composite gasket.
The working process of the composite gasket is as follows:
under the low-temperature working condition of the battery: the external circuit supplies power to the composite gasket, and the graphene network in the composite gasket functional layer 1 is electrified to generate heat, so that the effect of heating the battery is achieved, and the battery reaches the optimal working temperature;
secondly, under the working condition of instantaneous large current of the battery: a large amount of heat can be instantly generated under the instantaneous large-current working condition of the battery, the heat is conducted to the functional layer 1 of the composite gasket through the first electrode layer 2 and the second electrode layer 3, and the phase-change heat storage material in the functional layer 1 can absorb the heat to prevent the battery from being instantaneously overheated; the graphene network, the first electrode layer 2 and the second electrode layer 3 in the functional layer 1 can provide good heat conduction channels, so that the phase-change material can absorb heat fully;
thirdly, under the working condition that the battery continuously works and releases heat: the battery continuously generates heat in a continuous working state, the generated heat can be transversely conducted through the first electrode layer 2, the functional layer 1 and the second electrode layer 3, the heat is conducted out to an external heat dissipation channel, and the battery is prevented from being overheated. The graphene network, the first electrode layer 2 and the second electrode layer 3 in the functional layer 1 can provide good heat conduction channels.
Example 2
A composite gasket for thermal management of a battery, having a layer structure relationship in accordance with example 1, has a functional layer 1 having a thickness of 1000 μm, first and second electrode layers 2 and 3 having a thickness of 30 μm, and first and second thermal conductive adhesive layers 4 and 5 having a thickness of 500 μm.
The preparation method comprises the following steps:
s1, preparing a graphene network: mixing 0.6 part by weight of graphene, 1 part by weight of polyurethane and 0.1 part by weight of foaming agent, foaming, drying to obtain graphene carbon-forming polymer composite foam, drying at the temperature of 80 ℃, and carbonizing at the temperature of 1200 ℃ for 2 hours to obtain a graphene network.
S2, preparing a functional layer 1: and heating the phase change heat storage material to a high enough temperature to melt the phase change heat storage material, pouring the phase change heat storage material into the graphene network, and cooling and shaping the graphene network to obtain the graphene network composite phase change heat storage material. And then cutting and rolling the graphene network composite phase change heat storage material to obtain a sheet with the thickness of 1000 microns, thereby obtaining the functional layer 1.
S3, preparing an electrode layer: the copper wires are woven into a net shape, rolled into a sheet with the thickness of 30 mu m, and then cut to obtain the first electrode layer 2 and the second electrode layer 3.
S4, preparing a composite gasket: and (3) carrying out hot rolling on the functional layer 1 prepared in the step S2 and the first electrode layer 2 and the second electrode layer 3 prepared in the step S3 at the temperature of 70 ℃ to obtain the composite gasket.
Example 3
A composite gasket for thermal management of a battery, having a layer structure relationship in accordance with example 1, has a functional layer 1 having a thickness of 2000 μm, first and second electrode layers 2 and 3 having a thickness of 50 μm, and first and second thermal conductive adhesive layers 4 and 5 having a thickness of 1000 μm.
The preparation method comprises the following steps:
s1, preparing a graphene network: mixing 1 part by weight of graphene, 1 part by weight of polyurethane and 0.1 part by weight of foaming agent, foaming, drying to obtain graphene carbon-forming polymer composite foam, drying at the temperature of 80 ℃, and carbonizing at the temperature of 1200 ℃ for 2 hours to obtain a graphene network.
S2, preparing a functional layer 1: and heating the phase change heat storage material to a high enough temperature to melt the phase change heat storage material, pouring the phase change heat storage material into the graphene network, and cooling and shaping the graphene network to obtain the graphene network composite phase change heat storage material. And then cutting and rolling the graphene network composite phase change heat storage material to obtain a sheet with the thickness of 1000 mu m, thereby obtaining the functional layer 1.
S3, preparing an electrode layer: the copper wires are woven into a net shape, rolled into a sheet with the thickness of 50 mu m, and then cut to obtain the first electrode layer 2 and the second electrode layer 3.
S4, preparing a composite gasket: the functional layer 1 prepared in S2, and the first electrode layer 2 and the second electrode layer 3 prepared in S3 were hot rolled at a temperature of 70 ℃ to obtain a composite gasket.
Comparative example 1
The preparation method of example 3 was followed based on example 3, except that no phase change thermal storage paraffin was added to the functional layer 1 in comparative example 1.
Experimental example 1
The composite gaskets of examples 1-3 and comparative example 1 were respectively mounted on the side surfaces of 4 300kw power batteries, and in order to ensure the experimental scientificity, a battery without the composite gasket was taken as a blank set, and the power batteries were tested for battery temperature after the power battery rated power output titration time at room temperature of 26 ℃, and the test results are shown in the following table.
TABLE 1 summary of the results of the heat dissipation test in examples 1-3 and comparative example 1
Figure BDA0003697498080000071
From the data in table 1, it can be seen that, comparing examples 1-3 and the blank group, it is demonstrated that the power battery generates heat during operation, and the composite gasket is indeed effective in dissipating heat of the power battery; compared with the examples 1 to 3, after the thickness of each functional layer is increased, the heat dissipation effect of the composite gasket on the power battery is gradually improved, and particularly, the functional layer has good heat absorption and heat storage effects, and the thicker the thicknesses of the first electrode layer and the second electrode layer are, the better the heat conduction effect is; comparing example 3 with comparative example 1, it is further confirmed that example 3 with the phase change heat storage material has a significantly better temperature maintenance effect on the power battery than comparative example 1, and further confirms the heat absorption and storage effects of the functional layer.
Experimental example 2
The composite mats of examples 1-3 were tested for surface temperature after a period of energization at a temperature of-10/° c, with the results shown in the table below.
Table 2 summary of the results of the heating effect tests of examples 1-3
Figure BDA0003697498080000081
As can be seen from the data in table 2, the composite gasket can indeed generate heat after being electrified, and the power battery can reach the working temperature when the air temperature is low.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.

Claims (10)

1. A composite gasket for thermal management of a battery, comprising:
the graphene composite material comprises a functional layer (1) with heat conduction, heat storage and heating functions, wherein the functional layer (1) is a layered composite formed by injecting a molten phase-change heat storage material into graphene in a network-shaped distribution and then cooling, cutting and rolling, and the thickness of the functional layer (1) is 20-2000 mu m.
2. The composite gasket for thermal management of a battery of claim 1, wherein: the upper surface of functional layer (1) sets up first electrode layer (2) that contain electrically conductive, heat conduction function, the lower surface of functional layer (1) sets up second electrode layer (3) that contain electrically conductive, heat conduction function, the thickness of first electrode layer (2), second electrode layer (3) is 10 ~ 50 mu m.
3. The composite gasket for thermal management of a battery of claim 2, wherein: one side that functional layer (1) was kept away from in first electrode layer (2) sets up first heat-conducting glue layer (4) that contains heat conduction, insulation, function, first heat-conducting glue layer (4) are glued the solidification by insulating heat conduction when the installation and are formed, the one side that functional layer (1) was kept away from in second electrode layer (3) sets up second heat-conducting glue layer (5) that contain heat conduction, insulation, function, second heat-conducting glue layer (5) are glued the solidification by insulating heat conduction when the installation and are formed, the thickness of first heat-conducting glue layer (4) and second heat-conducting glue layer (5) is 100 ~ 1000 mu m.
4. A composite gasket for thermal management of a battery as claimed in any one of claims 1 to 3, wherein: the phase change heat storage material comprises but is not limited to one or more of a hydrated salt phase change material, a high molecular phase change material and a paraffin phase change material.
5. The composite gasket for thermal management of a battery of claim 2, wherein: the first electrode layer (2) and the second electrode layer (3) are made of metal with good electric and thermal conductivity.
6. The composite gasket for battery thermal management according to claim 5, wherein the material of the first electrode layer (2) and the second electrode layer (3) is in the form of one or more selected from the group consisting of metal foil, metal mesh, metal tape, metal wire, and metal wire braid.
7. A composite gasket for thermal management of a battery as defined in claim 3, wherein: the first heat-conducting adhesive layer (4) and the second heat-conducting adhesive layer (5) are formed by curing a silicone adhesive.
8. A method of making a composite gasket for thermal management of a battery as claimed in any one of claims 1 to 7, comprising the steps of:
s1, preparing a graphene network: mixing graphene, a carbon-forming polymer and a foaming agent, foaming, drying, and carbonizing at 800-2000 ℃ for 0.5-4 h to obtain a graphene network;
s2, preparing functional layer (1): heating the phase-change material to a molten state, injecting the phase-change material into the graphene network, cooling, cutting and rolling to obtain a functional layer (1);
s3, preparing an electrode layer: rolling the material of the electrode layer into a sheet to obtain a first electrode layer (2) and a second electrode layer (3);
s4, preparing the composite gasket: and (3) carrying out hot rolling on the functional layer (1) prepared in the S2, the first electrode layer (2) prepared in the S3 and the second electrode layer (3) at the temperature of 60-120 ℃ to obtain the composite gasket.
9. The method of making a composite gasket for thermal management of a battery of claim 8, wherein: graphene in the S1: carbon-forming polymer: the foaming agent has a weight ratio (0.1-1): 1:0.1.
10. The method of making a composite gasket for thermal management of a battery of claim 8, wherein: the carbon-forming polymer is selected from one or a mixture of polyvinyl alcohol, polyurethane, polyimide, polymethyl methacrylate and polyvinyl chloride.
CN202210678788.6A 2022-06-16 2022-06-16 Composite gasket for battery thermal management and preparation method thereof Pending CN114899532A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104871640A (en) * 2012-12-21 2015-08-26 乐金华奥斯有限公司 Heating sheet for battery module and battery module including same
CN105018041A (en) * 2015-06-11 2015-11-04 贵州新碳高科有限责任公司 Porous graphene film, and phase-changing energy-storing composite material
CN106190038A (en) * 2016-06-29 2016-12-07 同济大学 A kind of preparation method of Graphene cross-linked network phase-change thermal storage/conducing composite material
US11339316B1 (en) * 2020-12-24 2022-05-24 Guangdong University Of Technology Method and device for preparing graphene-based polyethylene glycol phase change material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104871640A (en) * 2012-12-21 2015-08-26 乐金华奥斯有限公司 Heating sheet for battery module and battery module including same
CN105018041A (en) * 2015-06-11 2015-11-04 贵州新碳高科有限责任公司 Porous graphene film, and phase-changing energy-storing composite material
CN106190038A (en) * 2016-06-29 2016-12-07 同济大学 A kind of preparation method of Graphene cross-linked network phase-change thermal storage/conducing composite material
US11339316B1 (en) * 2020-12-24 2022-05-24 Guangdong University Of Technology Method and device for preparing graphene-based polyethylene glycol phase change material

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