Intelligent temperature control thermal management phase change material and preparation method and application thereof

Abstract

The invention relates to the technical field of safety materials, in particular to an intelligent temperature control thermal management phase change material and a preparation method thereof. The raw materials comprise carbon nanotubes, an inorganic or organic phase change material, an auxiliary agent, a solvent, a pH regulator, a humectant, a thickener and a structure enhancer. According to the invention, the tunnel effect of the carbon nanotube, the large pi bond structure and the heat absorption and heat dissipation characteristics of the phase change material are combined, the heating and heat dissipation functions are integrated, the energy conversion efficiency is obviously improved, and the constant temperature state is realized. The method is mainly applied to the field of energy storage, such as pipeline heat preservation, cold-chain logistics, new energy power batteries, energy storage system safety, data center energy conservation and safety construction and the like. And the packaging process adopts simplified packaging, so that not only is the product performance improved, but also the equipment investment and the production cost are reduced, and double improvements of performance and economic benefits are brought to the field of temperature control thermal management.

Description

Technical Field

[0001] The present application relates to the technical field of safety materials, and more specifically, to an intelligent temperature-controlled thermal management phase change material and a preparation method and application thereof. Background Art

[0002] Intelligent temperature regulation thermal management phase change material is an advanced composite material that can absorb or release a large amount of latent heat during the phase change process to achieve energy storage and release. The working principle of this material is as follows: when the temperature of the surrounding environment exceeds its phase change point, the material absorbs and stores heat to reduce the ambient temperature; conversely, when the ambient temperature is lower than the phase change point, the material releases the previously stored heat to increase the ambient temperature. Under extremely low temperature conditions, the material can also generate heat under low voltage to ensure that the ambient temperature is maintained at a constant level, thereby maintaining the excellent performance of the product and effectively controlling the temperature of the surrounding environment.

[0003] With the development of new energy vehicles, both over-cold and over-heated temperatures in winter and summer are not very friendly to batteries. Considering how to keep the battery in a stable and comfortable environment, creating an excellent working environment is an important factor for the battery to maximize its advantages, regardless of the cold or hot seasons. There is a lack of effective control measures for thermal runaway and thermal management of batteries. Battery thermal runaway is caused by multiple uncontrollable reasons. Once thermal runaway occurs, it will cause immeasurable safety accidents, and current fire-fighting measures cannot be used effectively: in extremely cold conditions, the battery power cannot be used efficiently, which is the biggest disadvantage in the cold season.

[0004] The existing energy storage and heat preservation of batteries generally use aerogel structures for heat insulation. The aerogel structure sacrifices heat dissipation to maintain thermal runaway, which is not conducive to normal use and the dissipation of battery self-heating, which makes thermal runaway more likely. In addition, the thermal insulation performance of aerogel mainly depends on its internal nanoporous structure. In practical applications, this structure may be affected by many factors, such as temperature, pressure, humidity, etc., which will cause the direction of the thermal insulation effect to deviate. When the temperature of the battery is too high due to thermal runaway, the aerogel structure will collapse and melt, resulting in the failure of the thermal insulation performance; however, the battery cannot be started in extremely cold conditions (<-5℃).

[0005] Therefore, there is an urgent need to develop an "air conditioner" that can keep the battery warm before it is started and provide a temperature-controlled "air conditioner" for the battery, which can play the role of "warm in winter and cool in summer". That is, it can dissipate heat when the operating temperature is high and play a heating role in a colder environment. This intelligent temperature control thermal management material has great research value and commercial value. Summary of the invention

[0006] The present application provides an intelligent temperature control thermal management phase change material and a preparation method thereof, which can realize intelligent switching of temperature control, heat absorption, energy storage, and heat insulation, create an excellent working environment for the battery, and ensure that the battery can achieve the maximum advantage.

[0007] In order to achieve the above objectives, the present application provides an intelligent temperature control thermal management phase change material, including carbon nanotubes, inorganic or organic phase change materials, additives, solvents, pH regulators, moisturizers, thickeners and structure enhancers.

[0008] Furthermore, the carbon nanotubes are one or more of single-walled or multi-walled carbon nanotubes.

[0009] Furthermore, the inorganic phase change material is a crystalline hydrated salt.

[0010] Furthermore, the organic phase change material is one or more of paraffin, fatty acid, and polyol.

[0011] Furthermore, the auxiliary agent is one or more of silicate, silicon oxide and silicon hydroxide.

[0012] Furthermore, the solvent is one or more of methyl acetate, cyclohexane, cyclohexanone, deionized water, dilute acid, and dilute alkali.

[0013] Furthermore, the pH adjuster is one or more of hydrochloric acid, sulfuric acid, acetic acid, sodium hydroxide, sodium carbonate, ammonia water, and ethanolamine.

[0014] Furthermore, the moisturizing agent is one or more of glycerol, polyethylene glycol, and sodium tripolyphosphate.

[0015] Furthermore, the thickener is one or more of modified starch, gelatin, sodium carboxymethyl cellulose, and cellulose.

[0016] Furthermore, the structural enhancer is one or more of floating beads, glass microbeads, and hollow ceramic microbeads.

[0017] Furthermore, the inorganic or organic phase change material: the auxiliary agent: the carbon nanotubes: the moisturizing agent: the thickener: the structure enhancer: the pH adjuster is 1:(1-2):(0.1-0.5):(0.1-0.3):(0.1-0.3):(0.1-0.3):(0.3-0.8).

[0018] Furthermore, the ratio of the auxiliary agent to the solvent is 1:(0.5-2).

[0019] Furthermore, the phase change temperature of the intelligent temperature control thermal management phase change material is 90-120°C.

[0020] Furthermore, the flame retardant temperature of the intelligent temperature control thermal management phase change material is greater than 1200°C.

[0021] Furthermore, the tolerance pressure of the intelligent temperature control thermal management phase change material is greater than 2.0 MPa.

[0022] In addition, the present application also provides a method for preparing an intelligent temperature control thermal management phase change material, which is characterized in that it includes the following steps: taking raw materials, configuring them according to a ratio, and mixing them evenly.

[0023] Furthermore, the mixing conditions are: a rotation speed of 600-1500 r / min and a temperature of 30-60°C.

[0024] In addition, the present application also provides an application of an intelligent temperature control thermal management phase change material in the field of energy storage.

[0025] The present invention provides an intelligent temperature control thermal management phase change material and a preparation method thereof, which has the following beneficial effects:

[0026] 1. The intelligent temperature control thermal management phase change material of this application adopts a combination of controllable temperature and phase change technology, and utilizes the tunnel effect of carbon nanotubes, large π bond structure and heat absorption and heat dissipation characteristics of phase change materials to realize the integration of heating and heat dissipation functions, realize heating at extremely cold temperatures, and realize rapid absorption and release of energy under high temperature conditions, thereby significantly improving the energy conversion efficiency and achieving a constant temperature state. Under extremely cold conditions (-20°C), the ambient temperature can be quickly raised to increase the temperature. When thermal runaway occurs, the stored heat can be quickly released by phase change. In the traditional solid-liquid phase change process, the liquid still has a high thermal conductivity after the phase change and cannot prevent the occurrence of thermal runaway of the battery. When the phase change occurs in the intelligent temperature control thermal management phase change material of this application, a certain amount of gas is generated inside it to reduce its thermal conductivity. When the gas is completely released, a loose porous material is generated inside it under the action of the additive, thereby further playing a role and resisting the further spread of heat to prevent the occurrence of thermal runaway. The intelligent temperature control thermal management phase change material of this application can withstand high temperatures exceeding 1600°C.

[0027] 2. The intelligent temperature control thermal management phase change material of this application has a high thermal conductivity and a large thermal enthalpy value. Its raw materials are compounded into a gel texture with a high thermal conductivity. The use of a phase change material with a high enthalpy value can quickly transfer the heat from the heat source to the phase change material. Its phase change temperature is 90-120°C, the flame retardant temperature is greater than 1200°C, and the pressure resistance is greater than 2.0Mpa. In a low temperature environment, it can achieve self-heating to keep the temperature within a certain range and achieve a constant temperature effect; in a high temperature environment, the phase change material absorbs a large amount of heat through phase change, thereby maintaining the internal temperature of the system at a lower level.

[0028] 3. After the intelligent temperature control and thermal management phase change material of the present application fails due to absorbing a large amount of heat, a porous inorganic structure is generated. The porous structure can further prevent heat transfer and the spread of fire, thereby playing a role in preventing heat transfer.

[0029] 4. The phase change material of the intelligent temperature control thermal management of this application has strong thermal insulation and heat insulation performance, and is mainly used in the field of energy storage, such as pipeline insulation, cold chain logistics, new energy power batteries, energy storage system safety, data center energy saving and safety construction, etc. Its packaging process adopts simplified packaging, which not only improves product performance, but also reduces equipment investment and production costs, bringing a double improvement in performance and economic benefits to the field of temperature control thermal management. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0031] Figure 1 a is a product diagram of an intelligent temperature control thermal management phase change material provided according to an embodiment of the present application;

[0032] Figure 1 b is a diagram of the intelligent temperature control thermal management phase change material product provided in an embodiment of the present application after thermal runaway testing;

[0033] Figure 2 It is a schematic diagram of the cold surface and hot surface of the intelligent temperature control thermal management phase change material prepared according to the embodiment of the present application;

[0034] Figure 3 It is the differential scanning calorimeter (DSC) test result of the intelligent temperature control thermal management phase change material prepared according to the embodiment of the present application;

[0035] Figure 4 This is the thermal runaway test result of the intelligent temperature control thermal management phase change material prepared according to the embodiment of the present application (I);

[0036] Figure 5 This is the thermal runaway test result (II) of the intelligent temperature control thermal management phase change material prepared according to the embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0041] In addition, the term "plurality" shall mean two or more.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] The technical problem to be solved by this application is that there is a lack of effective control means for thermal runaway and thermal management of batteries. Thermal runaway of batteries is caused by multiple uncontrollable reasons. Once thermal runaway occurs, it will cause immeasurable safety accidents, and current firefighting means cannot effectively extinguish the fire. In extremely cold conditions, the battery power cannot be efficiently utilized, which is the biggest disadvantage in the cold season. Existing energy storage and thermal insulation for batteries generally use aerogel structures for thermal insulation. The aerogel structure sacrifices heat dissipation to achieve the purpose of maintaining thermal runaway, which is not conducive to normal use and the dissipation of battery self-heating, which is more likely to cause thermal runaway. Furthermore, the thermal insulation performance of aerogel mainly depends on its internal nanoporous structure. In practical applications, this structure may be affected by a variety of factors, such as temperature, pressure, humidity, etc., which will cause the direction of the thermal insulation effect to deviate, and when the temperature of the battery thermal runaway is too high, the aerogel structure will collapse and melt, resulting in the failure of the thermal insulation performance; however, the battery cannot be started in extremely cold conditions (<-5°C).

[0044] Therefore, the present application has developed an intelligent temperature control thermal management material that can keep the battery warm before it is started and act as a temperature-controllable "air conditioner" for the battery, playing the role of "warm in winter and cool in summer", that is, it can dissipate heat when the operating temperature is high and play a heating role in a colder environment.

[0045] This application adopts a combination of controllable temperature and phase change technology to achieve heating and heat release under different conditions. Different from the traditional aerogel series products that reduce the impact of thermal runaway by sacrificing heat dissipation, the intelligent temperature control thermal management phase change material of this application stores heat at a lower temperature with a higher thermal conductivity and heat capacity absorption, thereby preventing the temperature of the heat source from further increasing. At a higher temperature, through the phase change of the phase change material, a large amount of heat is absorbed to prevent heat transfer when thermal runaway occurs. At the same time, after the phase change material fails to absorb heat, a porous inorganic structure is generated, and the porous structure still plays a role in preventing heat transfer.

[0046] The intelligent temperature control thermal management phase change material of this application has a high thermal conductivity and a large thermal enthalpy value, and can quickly transfer the heat from the heat source to the phase change material. In a low temperature environment, it can achieve self-heating to keep the temperature within a certain range and achieve a constant temperature effect. In a high temperature environment, the phase change material absorbs a large amount of heat through phase change, thereby maintaining the internal temperature of the system at a lower level. Even after it fails due to a large amount of heat absorption, it produces a porous structure, which can further prevent heat transfer and fire spread.

[0047] The intelligent temperature control thermal management phase change material of this application can realize intelligent switching of temperature control, heat absorption, energy storage, and heat insulation, creating an excellent working environment for the battery and ensuring that the battery can achieve the maximum advantage.

[0048] The embodiment of the present application provides an intelligent temperature control thermal management phase change material, the raw materials of which include: carbon nanotubes, inorganic or organic phase change materials, additives, solvents, pH regulators, moisturizers, thickeners and structural enhancers.

[0049] Specifically, a certain amount of carbon nanotubes is added to the composite phase change material to enhance the heat absorption and thermal conductivity of the phase change material so that the ambient temperature is always in a relatively low stable state; the carbon nanotubes are one or more single-walled or multi-walled carbon nanotubes.

[0050] Specifically, the inorganic phase change material is a crystalline hydrated salt; the organic phase change material is one or more of paraffin, fatty acid, and polyol.

[0051] Specifically, the auxiliary agent is one or more of silicate, silicon oxide, and silicon hydroxide; the solvent is one or more of methyl acetate, cyclohexane, cyclohexanone, deionized water, dilute acid, and dilute alkali; the pH adjuster is one or more of hydrochloric acid, sulfuric acid, acetic acid, sodium hydroxide, sodium carbonate, ammonia water, and ethanolamine; the moisturizer is one or more of glycerol, polyethylene glycol, and sodium tripolyphosphate; the thickener is one or more of modified starch, gelatin, sodium carboxymethyl cellulose, and cellulose; the structure enhancer is one or more of floating beads, glass microbeads, and hollow ceramic microbeads.

[0052] Furthermore, the inorganic or organic phase change material: auxiliary agent: carbon nanotube: moisturizer: thickener: structure enhancer: pH adjuster is 1:(1-2):(0.1-0.5):(0.1-0.3):(0.1-0.3):(0.1-0.3):(0.3-0.8).

[0053] Furthermore, the ratio of auxiliary agent to solvent is 1:(0.5-2).

[0054] In addition, an embodiment of the present application also provides a method for preparing an intelligent temperature control thermal management phase change material, comprising the following steps: taking raw materials, configuring them according to a ratio, and mixing them evenly to obtain a solution.

[0055] Specifically, the mixing conditions are: a rotation speed of 600-1500 r / min and a temperature of 30-60°C.

[0056] The phase change temperature of the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application is 90-120°C, the flame retardant temperature is greater than 1200°C, and the withstand pressure is greater than 2.0Mpa.

[0057] The preferred embodiment of the present application provides an intelligent temperature control thermal management phase change material, the raw materials of which include: single-walled carbon nanotubes, sodium sulfate dodecahydrate, additives (potassium silicate: lithium silicate (0.4:0.2)), deionized water solvent, hydrochloric acid pH regulator, glycerol moisturizer, methyl cellulose thickener, and hollow ceramic microbead structure enhancer.

[0058] The preparation method of this preferred embodiment includes the following steps: weighing raw materials so that the ratio of sodium sulfate dodecahydrate: auxiliary agent: carbon nanotubes: humectant: thickener: structure enhancer: pH adjuster is 1:2:0.1:0.1:0.1:0.2:0.5, and the ratio of auxiliary agent: solvent is 1:0.5; mixing them evenly into a solution at 45°C and 600r / min to obtain an intelligent temperature control thermal management phase change material.

[0059] Experimental Example 1

[0060] A temperature rise test was performed on the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application.

[0061] Test method: Use a device with adjustable voltage of 0-220V, with the positive and negative poles of the device clamped at both ends of the heatable material, adjust the voltage to 220V, time for 1 minute, use a temperature gun to test the temperature change, and record the data. The test results are shown in Table 1 below.

[0062] Table 1 Temperature rise test results of phase change materials for intelligent temperature control thermal management

[0063] Initial temperature(℃) Final temperature(℃) Experiment 1 19.4 26 Experiment 2 20.4 27 Experiment 3 20.5 26

[0064] As shown in Table 1, under a voltage of 220V, the temperature of the intelligent temperature control thermal management phase change material increases by an average of 6°C within 1 minute. This shows that the intelligent temperature control thermal management phase change material reaches the set temperature quickly.

[0065] Experimental Example 2

[0066] The DSC test was performed on the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application. The test results are as follows Figure 1 shown.

[0067] Differential Scanning Calorimeter (DSC) Test Method:

[0068] 1. Sample preparation: Choose the appropriate sample size. This product is a black or gray gel. The sampling method is scraping to ensure sample purity and avoid the influence of impurities on the test results to ensure the uniformity of heat transfer. The common sample size is between 10-50mg.

[0069] 2. Instrument settings: Set the appropriate temperature range and heating rate. The heating rate for this test is set at 10℃ / min.

[0070] 3. Test process: Before the test, place the sample and reference into the DSC instrument for temperature balance. After starting the DSC test, the instrument will heat according to the set program, record the heat changes of the sample and reference in real time, and form a DSC curve.

[0071] 4. Result analysis: Perform baseline correction on the DSC curve to eliminate the influence of instrument noise and sample weight difference; identify thermal events on the DSC curve and calculate heat capacity.

[0072] DSC test requirements:

[0073] 1. Sample requirements: The sample should be dry, pure and free of impurities. The block sample requires the test surface to be clean and flat. The sample dosage is generally 10mg to 50mg, and it cannot be overloaded.

[0074] 2. Instrument parameters: DSC testing requires attention to conditions such as heating rate, experimental atmosphere, sample dosage, etc. The selection of heating rate should be determined according to the nature of the sample and the purpose of the experiment. Too fast a heating rate may affect the accuracy of the test results.

[0075] 3. Experimental atmosphere: Select a suitable atmosphere according to the properties of the sample and the test requirements. This example uses air as the test atmosphere.

[0076] Test results:

[0077] See also Figure 3 In the differential scanning calorimeter (DSC) test, the starting point of the sample temperature was 126.39°C, the ending point was 182.17°C, and the peak value reached 139.9°C.

[0078] It can be seen that the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application has a relatively high enthalpy value of 2203 J / g, which can effectively absorb the heat generated by the battery due to charging and discharging, and maintain the battery temperature at a suitable operating temperature.

[0079] Experimental Example 3

[0080] The thermal runaway test was conducted on the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application. The test results are as follows: Figure 4 , Figure 5 shown.

[0081] Thermal runaway test method:

[0082] 1. Prepare experimental equipment and materials: single-sided heating pressure test bench, pressure tester, temperature controller, 16-channel temperature recorder, thermocouple, timer, DMA-T·PCM modified No. 1 sample.

[0083] 2. Experimental conditions:

[0084] The heating stage applies 3000N pressure.

[0085] 3. Testing process:

[0086] Ambient temperature: 25℃ Place the product in the oven → Apply 3000N pressure → Determine heating temperature and duration according to test requirements → Record hot and cold surface temperatures → End of experiment.

[0087] Test results:

[0088] See also Figure 4 During the battery thermal runaway test, the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application had an average temperature of the hot surface of up to 587.55°C and an average temperature of the cold surface of 200°C after 15 minutes. Then, the average temperature of the hot surface slowly dropped to 400°C and maintained for 1.5 hours. During this period, the average temperature of the cold surface remained at around 200°C, with a maximum of 210.15°C, which is lower than the runaway temperature of the ternary lithium battery on the market. It can be seen that the intelligent temperature control thermal management phase change material provided in the embodiment of the present application can effectively prevent battery thermal runaway.

[0089]

[0090]

[0091] See also Figure 5 During the battery thermal runaway test, the intelligent temperature control thermal management phase change material prepared in the embodiment of the present application has an average temperature of 400°C on the hot side and 103°C on the cold side within 30 minutes, and then the average temperature of the hot side rises to 650°C and then drops to 400°C and maintains for 40 minutes. During this period, the average temperature of the cold side is always maintained at around 180°C, with the highest being only 184.4°C. It can be seen that the intelligent temperature control thermal management phase change material can effectively prevent the occurrence of battery thermal runaway.

[0092] time Average temperature of hot surface Average temperature of cold noodles 51min 399.10℃ 102.99℃ 63min 658.98℃ 182.00℃ 80min 422.32℃ 184.40℃ 102min 407.32℃ 182.00℃

[0093] In summary, the intelligent temperature control thermal management phase change material of this application adopts a combination of controllable temperature and phase change technology, and utilizes the tunneling effect of carbon nanotubes, large π bond structure and heat absorption and heat dissipation characteristics of phase change materials to achieve heating and heat dissipation functions in one. Heating is achieved at extremely cold temperatures, and rapid absorption and release of energy is achieved under high temperature conditions, thereby significantly improving energy conversion efficiency and achieving a constant temperature state.

[0094] The intelligent temperature control thermal management phase change material of this application has a high thermal conductivity and a large thermal enthalpy value, and can quickly transfer the heat of the heat source to the phase change material. Its phase change temperature is 90-120°C, the flame retardant temperature is greater than 1200°C, and the pressure resistance is greater than 2.0Mpa. In a low temperature environment, it can achieve self-heating to keep the temperature within a certain range and achieve a constant temperature effect; in a high temperature environment, the phase change material absorbs a large amount of heat through phase change, thereby maintaining the internal temperature of the system at a lower level. After failing due to a large amount of heat absorption, a porous inorganic structure is generated, which can further prevent heat transfer and the spread of fire, and play a role in preventing heat transfer.

[0095] The intelligent temperature control thermal management phase change material in this application has strong thermal insulation and heat insulation properties and is mainly used in the energy storage field, such as pipeline insulation, cold chain logistics, new energy power batteries, energy storage system safety, data center energy saving and safety construction, etc.

[0096] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An intelligent temperature control thermal management phase change material, characterized in that: Ingredients include: Carbon nanotubes, inorganic or organic phase change materials, additives, solvents, pH adjusters, moisturizers, thickeners and structure enhancers.

2. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The carbon nanotubes are one or more of single-walled carbon nanotubes and multi-walled carbon nanotubes.

3. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The inorganic phase change material is a crystalline hydrated salt; the organic phase change material is one or more of paraffin, fatty acid and polyol.

4. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The auxiliary agent is one or more of silicate, silicon oxide, and silicon hydroxide; the solvent is one or more of methyl acetate, cyclohexane, cyclohexanone, deionized water, dilute acid, and dilute alkali; the pH adjuster is one or more of hydrochloric acid, sulfuric acid, acetic acid, sodium hydroxide, sodium carbonate, ammonia water, and ethanolamine; the moisturizer is one or more of glycerol, polyethylene glycol, and sodium tripolyphosphate; the thickener is one or more of modified starch, gelatin, sodium carboxymethyl cellulose, and cellulose; the structure enhancer is one or more of floating beads, glass microbeads, and hollow ceramic microbeads.

5. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The inorganic or organic phase change material: the auxiliary agent: the carbon nanotubes: the moisturizing agent: the thickener: the structure enhancer: the pH adjuster are 1:(1-2):(0.1-0.5):(0.1-0.3):(0.1-0.3):(0.1-0.3):(0.3-0.8).

6. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The ratio of the auxiliary agent to the solvent is 1:(0.5-2).

7. The intelligent temperature control thermal management phase change material according to claim 1, characterized in that: The phase change temperature of the intelligent temperature control thermal management phase change material is 90-120° C., the flame retardant temperature is greater than 1200° C., and the pressure resistance is greater than 2.0 MPa.

8. A method for preparing the intelligent temperature control thermal management phase change material according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: taking raw materials, configuring them according to a proportion, and mixing them evenly.

9. The method for preparing the intelligent temperature control thermal management phase change material according to claim 6, characterized in that: The mixing conditions are: a rotation speed of 600-1500 r / min and a temperature of 30-60°C.

10. Application of the intelligent temperature control thermal management phase change material according to any one of claims 1 to 9 in the field of energy storage.

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