A two-component addition type heat-conducting gel, its preparation method and application

Abstract

The application provides a two-component addition type heat-conducting gel as well as a preparation method and application thereof. The two-component addition type heat-conducting gel comprises an A component and a B component. The preparation raw materials of the A component comprise vinyl silicone oil, hydrogen-terminated silicone oil, crosslinked hydrogen silicone oil, heat-conducting fillers and inhibitors. The preparation raw materials of the B component comprise vinyl silicone oil, heat-conducting fillers and catalysts. The heat-conducting fillers in the A component and the B component both comprise modified aluminum hydroxide and modified zinc oxide. The two-component addition type heat-conducting gel provided by the application can simultaneously have low density and high heat conductivity by introducing the modified aluminum hydroxide and the modified zinc oxide into the raw material system, can well meet the lightweight requirement of new energy vehicles, and has good extrudability and anti-settling property.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal conductive gels and relates to a two-component addition-type thermal conductive gel and a preparation method and application thereof. Background Art

[0002] With the development of new energy vehicles, the motor power of new energy vehicles is getting higher and higher, which brings with it the problem of battery heat dissipation. Therefore, it is necessary to improve the heat dissipation performance of the battery module to match the high power of the motor.

[0003] The existing thermal conductive adhesive can play a role in heat conduction and heat dissipation in battery modules, but the density of the current thermal conductive adhesive is too high. If the thermal conductivity is 2.0W·m -1 ·K -1 , then the density must be 2.5g·cm -3 The above shows that existing thermal conductive adhesives cannot achieve the characteristics of low density and high thermal conductivity.

[0004] Therefore, it is desired in the art to provide a thermally conductive gel that has low density, high thermal conductivity, good extrudability and anti-settling properties. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a two-component addition-type thermally conductive gel and a preparation method and application thereof.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a two-component addition-type thermally conductive gel, wherein the two-component addition-type thermally conductive gel comprises component A and component B;

[0008] The raw materials for preparing the A component include vinyl silicone oil, terminal hydrogen silicone oil, cross-linked hydrogen silicone oil, thermal conductive filler and inhibitor;

[0009] The raw materials for preparing the B component include vinyl silicone oil, thermal conductive filler and catalyst;

[0010] The thermal conductive fillers in the components A and B both include modified aluminum hydroxide and modified zinc oxide.

[0011] The two-component addition-type thermal conductive gel provided by the present invention introduces modified aluminum hydroxide and modified zinc oxide into the raw material system, so that the prepared thermal conductive gel has both low density and high thermal conductivity, which can well meet the lightweight requirements of new energy vehicles and has good extrusion and anti-settling properties.

[0012] Preferably, the surfaces of the modified aluminum hydroxide and the modified zinc oxide are both grafted with hydroxyethyl methacrylate and 3-methacryloxypropyltrimethoxysilane.

[0013] Preferably, the average particle size of the modified aluminum hydroxide is 6 to 10 μm, for example, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, 10 μm, etc.

[0014] Preferably, the average particle size of the modified zinc oxide is 5 to 10 μm, for example, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, 10 μm, etc.

[0015] Preferably, the modified aluminum hydroxide in component A accounts for 45 to 60 wt% of the total weight of the raw materials for preparing component A, for example, 45 wt%, 48 wt%, 50 wt%, 52 wt%, 54 wt%, 56 wt%, 58 wt%, 60 wt%, etc.

[0016] Preferably, the modified zinc oxide in component A accounts for 25-40wt% of the total weight of the raw materials for preparing component A, for example, 25wt%, 28wt%, 30wt%, 32wt%, 34wt%, 36wt%, 38wt%, 40wt%, etc.

[0017] Preferably, the modified aluminum hydroxide in the B component accounts for 45 to 60 wt% of the total weight of the raw materials for preparing the B component, for example, 45 wt%, 48 wt%, 50 wt%, 52 wt%, 54 wt%, 56 wt%, 58 wt%, 60 wt%, etc.

[0018] Preferably, the modified zinc oxide in the B component accounts for 25-40wt% of the total weight of the raw materials for preparing the B component, for example, 25wt%, 28wt%, 30wt%, 32wt%, 34wt%, 36wt%, 38wt%, 40wt%, etc.

[0019] The invention increases the usage ratio of aluminum hydroxide, can achieve high thermal conductivity and relatively low density, and adds zinc oxide to improve the anti-settling property of the system.

[0020] Preferably, the modified aluminum hydroxide or the modified zinc oxide is prepared by the following method:

[0021] (1) using a vinyl silane coupling agent hydrolyzate to modify the surface of aluminum hydroxide or zinc oxide to obtain a modified intermediate product;

[0022] (2) adding the modified intermediate product to an emulsifier aqueous solution, mixing, then adding hydroxyethyl methacrylate and part of the initiator, and performing a primary polymerization under heating conditions; after the reaction is completed, adding the remaining initiator and 3-methacryloxypropyltrimethoxysilane, performing a secondary polymerization, filtering, washing, and drying to obtain the modified aluminum hydroxide or the modified zinc oxide.

[0023] In the present invention, although the addition of zinc oxide can improve the anti-settling property of the thermal conductive gel, excessive addition of zinc oxide will make the colloid unstable and the gel will become soft after one or two months. In the present invention, on the basis of adding zinc oxide, the above-mentioned method is simultaneously used to modify aluminum hydroxide and zinc oxide. The synergistic effect of the two can improve the anti-settling property of the thermal conductive gel.

[0024] Preferably, the viscosity of the vinyl silicone oil in component A and component B is each independently 100 to 10,000 mPa·s, for example, 100 mPa·s, 300 mPa·s, 500 mPa·s, 800 mPa·s, 1,000 mPa·s, 2,000 mPa·s, 3,000 mPa·s, 5,000 mPa·s, 8,000 mPa·s, 10,000 mPa·s, etc., and the vinyl content is each independently 0.05 to 0.4 mmol / g, for example, 0.05 mmol / g, 0.08 mmol / g, 0.1 mmol / g, 0.2 mmol / g, 0.3 mmol / g, 0.4 mmol / g, etc.

[0025] Preferably, the viscosity of the end-hydrogen silicone oil and the cross-linked hydrogen silicone oil is independently 5 to 500 mPa·s, for example, 5 mPa·s, 10 mPa·s, 30 mPa·s, 50 mPa·s, 80 mPa·s, 100 mPa·s, 200 mPa·s, 300 mPa·s, 400 mPa·s, 500 mPa·s, etc.

[0026] Preferably, the silicon hydrogen content in the terminal hydrogenated silicone oil is 0.15 to 2 mmol / g, for example, 0.15 mmol / g, 0.3 mmol / g, 0.5 mmol / g, 0.8 mmol / g, 1 mmol / g, 1.3 mmol / g, 1.5 mmol / g, 1.8 mmol / g, 2 mmol / g, etc.

[0027] Preferably, the content of silicon hydrogen groups in the cross-linked hydrogen silicone oil is 1 to 10 mmol / g, for example, 1 mmol / g, 2 mmol / g, 3 mmol / g, 5 mmol / g, 8 mmol / g, 10 mmol / g, etc.

[0028] Preferably, the molar ratio of the silicon-hydrogen groups in the hydrogen-terminated silicone oil to the vinyl groups in the preparation raw material system is 0.6 to 0.9, such as 0.6, 0.7, 0.8, 0.9, etc.

[0029] Preferably, the molar ratio of the silicon hydrogen group in the cross-linked hydrogen silicone oil to the vinyl group in the preparation raw material system is 0.05 to 0.3, for example, 0.05, 0.08, 0.1, 0.2, 0.3, etc.

[0030] Preferably, the molar ratio of silyl groups to vinyl groups in the raw material system is 0.65 to 0.95, for example, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, etc.

[0031] Preferably, the inhibitor includes any one of 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane, 1,1,3,3-tetramethyl-1,3-divinylsiloxane, 3-methyl-1-butyn-3-ol, 1-ethynylcyclohexanol, 3-phenyl-1-butyn-3-ol, 3-propyl-1-butyn-3-ol, and 3-octyl-1-butyn-3-ol, or a combination of at least two thereof.

[0032] Preferably, the catalyst comprises a platinum catalyst (organic platinum complex).

[0033] Preferably, the catalyst comprises any one or a combination of at least two of an alcohol solution of chloroplatinic acid, a platinum catalyst coordinated with tetrahydrofuran, and a platinum catalyst coordinated with divinyltetramethylsiloxane.

[0034] Preferably, the amount of the catalyst added is 1 to 10 ppm of the total weight of all the raw materials for preparing component A and component B, such as 1 ppm, 3 ppm, 5 ppm, 8 ppm, 10 ppm, etc.

[0035] Preferably, the raw materials for preparing component B also include color paste, and the added amount is preferably 0.01-0.5% (based on the total weight of all the raw materials for preparing components A and B).

[0036] Preferably, the weight ratio of component A to component B is (0.8-1.2):1, wherein 0.8-1.2 can be, for example, 0.8, 0.9, 1, 1.1, 1.2, etc.

[0037] The present invention selects a suitable oil-powder ratio and selects suitable powder and oil (wherein the powder refers to the thermal conductive filler and the oil refers to the remaining other components) to make the thermal conductive gel have a suitable viscosity, facilitate extrusion construction, and have a low density and a high thermal conductivity coefficient.

[0038] In addition, the thermally conductive gel provided by the present invention is not prone to oil precipitation, and its thermal conductivity is stable for a long time after curing. By controlling the molar ratio of the cross-linked hydrogen silicone oil, the terminal hydrogen silicone oil, and the overall silicon-hydrogen group to vinyl group of the thermally conductive gel, a thermally conductive gel with moderate adhesion to the substrate and appropriate hardness can be obtained. This allows for easy peeling and rework while ensuring the buffering and shock-absorbing effects of the thermally conductive gel.

[0039] In a second aspect, the present invention provides a method for preparing the two-component addition-type thermally conductive gel as described in the first aspect, the preparation method comprising the following steps:

[0040] (1) mixing vinyl silicone oil, end-hydrogen silicone oil, cross-linked hydrogen silicone oil, thermal conductive filler and inhibitor to obtain the A component;

[0041] (2) mixing vinyl silicone oil, thermal conductive filler, and catalyst to obtain the B component;

[0042] (3) Component A and component B are mixed to obtain the two-component addition-type thermal conductive gel.

[0043] In a third aspect, the present invention provides an application of the two-component addition-type thermal conductive gel as described in the first aspect in a new energy battery assembly.

[0044] Compared with the prior art, the present invention has at least the following beneficial effects:

[0045] The two-component addition-type thermal conductive gel provided by the present invention introduces modified aluminum hydroxide and modified zinc oxide into the raw material system, so that the prepared thermal conductive gel has a low density (1.887-1.987 g·cm -3 ) and high thermal conductivity (2.096~2.185W·m -1 ·K -1 ), which can well meet the lightweight requirements of new energy vehicles, and at the same time has good extrudability (5.68 ~ 6.14g) and anti-settling properties. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0047] Unless otherwise specified, some of the raw materials used in the following preparation examples of the present invention are as follows:

[0048] Fatty alcohol polyoxyethylene ether: brand number 68439509.

[0049] Preparation Example 1-A

[0050] In this preparation example, a modified aluminum hydroxide is provided, which is prepared according to the following method:

[0051] (1) Add 10 g of vinyltrimethoxysilane to 5 L of aqueous solution at pH 3, stir for 10 min, then add 1 kg of aluminum hydroxide to perform surface modification, filter and wash with water until neutral to obtain a modified intermediate product;

[0052] (2) 200 g of fatty alcohol polyoxyethylene ether was added to 10 L of water and stirred until the solution became clear. 1 kg of the modified intermediate product prepared above was added and stirred for 30 min. 4 kg of hydroxyethyl methacrylate and 0.4 kg of an aqueous solution of ammonium persulfate (10 wt%) were then added dropwise under stirring conditions. The mixture was reacted at a constant temperature of 80° C., and the primary polymerization was completed after 6 h. 1.5 kg of 3-methacryloyloxypropyltrimethoxysilane and 0.2 kg of an aqueous solution of ammonium persulfate (10 wt%) were then added dropwise under stirring at 80° C. for secondary polymerization. The reaction was completed after 5 h. The mixture was filtered, washed, and dried to obtain the modified aluminum hydroxide.

[0053] Preparation Example 1-B

[0054] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 1-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0055] Preparation Example 2-A

[0056] In this preparation example, a modified aluminum hydroxide is provided, which is prepared according to the following method:

[0057] (1) Add 15 g of vinyltriethoxysilane to 5 L of aqueous solution at pH 5, stir for 10 min, then add 1 kg of aluminum hydroxide to perform surface modification, filter and wash with water until neutral to obtain a modified intermediate product;

[0058] (2) 300 g of fatty alcohol polyoxyethylene ether was added to 10 L of water and stirred until the solution became clear. 1 kg of the modified intermediate product prepared above was added and stirred for 20 min. 3 kg of hydroxyethyl methacrylate and 0.5 kg of an aqueous solution of ammonium persulfate (10 wt%) were then added dropwise under stirring conditions. The mixture was kept at 85° C. for constant temperature reaction and the primary polymerization was completed after 5 h. 2 kg of 3-methacryloyloxypropyltrimethoxysilane and 0.2 kg of an aqueous solution of ammonium persulfate (10 wt%) were then added dropwise under stirring at 85° C. for secondary polymerization. The reaction was completed after 5 h. The mixture was filtered, washed, and dried to obtain the modified aluminum hydroxide.

[0059] Preparation Example 2-B

[0060] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 2-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0061] Preparation Example 3-A

[0062] In this preparation example, a modified aluminum hydroxide is provided, which is prepared according to the following method:

[0063] (1) Add 15 g of vinyltriethoxysilane to 5 L of aqueous solution at pH 4, stir for 10 min, then add 1 kg of aluminum hydroxide to perform surface modification, filter and wash with water until neutral to obtain a modified intermediate product;

[0064] (2) Add 250g of fatty alcohol polyoxyethylene ether to 10L of water and stir until the solution becomes clear. Then, add 1kg of the modified intermediate product prepared above and stir for 30min. Then, dropwise add 5kg of hydroxyethyl methacrylate and 0.75kg of ammonium persulfate aqueous solution (10wt%) under stirring, and react at 80°C for 6h to complete the primary polymerization. Then, continue to add 1kg of 3-methacryloxypropyltrimethoxysilane and 0.2kg of ammonium persulfate aqueous solution (10wt%) under stirring at 80°C to carry out secondary polymerization. After 6h, the reaction is completed. The modified aluminum hydroxide is filtered, washed, and dried to obtain the modified aluminum hydroxide.

[0065] Preparation Example 3-B

[0066] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 3-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0067] Preparation Example 4-A

[0068] In this preparation example, a modified aluminum hydroxide is provided, which differs from Preparation Example 1-A only in that, in step (2), an equal amount of 3-methacryloxypropyltrimethoxysilane is used instead of hydroxyethyl methacrylate.

[0069] Preparation Example 4-B

[0070] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 4-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0071] Preparation Example 5-A

[0072] In this preparation example, a modified aluminum hydroxide is provided, which differs from Preparation Example 1-A only in that, in step (2), an equal amount of hydroxyethyl methacrylate is used instead of 3-methacryloyloxypropyltrimethoxysilane.

[0073] Preparation Example 5-B

[0074] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 5-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0075] Preparation Example 6-A

[0076] In this preparation example, a modified aluminum hydroxide is provided, which differs from Preparation Example 1-A only in that, in step (2), an equal amount of methyl methacrylate is used instead of hydroxyethyl methacrylate.

[0077] Preparation Example 6-B

[0078] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 6-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0079] Preparation Example 7-A

[0080] In this preparation example, a modified aluminum hydroxide is provided, which differs from Preparation Example 1-A only in that, in step (2), an equal amount of glycidyl methacrylate is used instead of 3-methacryloyloxypropyltrimethoxysilane.

[0081] Preparation Example 7-B

[0082] In this preparation example, a modified zinc oxide is provided, which differs from Preparation Example 7-A only in that the aluminum hydroxide in step (1) is replaced by an equal amount of zinc oxide.

[0083] Example 1

[0084] In this embodiment, a two-component addition-type thermally conductive gel is provided. The two-component addition-type thermally conductive gel includes component A and component B. The preparation method includes the following steps:

[0085] (1) 12 g of a vinyl silicone oil having a viscosity of 1000 cs and a vinyl content of 0.12 mmol / g, 20 g of a vinyl silicone oil having a viscosity of 200 cs and a vinyl content of 0.27 mmol / g, 15 g of a terminal hydrogenated silicone oil having a viscosity of 40 cs and a hydrogen content of 0.8 mmol / g, 0.95 g of a cross-linked hydrogenated silicone oil having a viscosity of 30 cs and a hydrogen content of 2.0 mmol / g, 210 g of a modified aluminum hydroxide having a particle size of 6 μm (prepared in Preparation Example 1-A), 150 g of a modified zinc oxide having a particle size of 5 μm (prepared in Preparation Example 1-B), and 0.05 g of an inhibitor (2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane) were mixed uniformly to obtain component A;

[0086] (2) 47.6 g of vinyl silicone oil with a viscosity of 200 cs and a vinyl content of 0.27 mmol / g, 210 g of modified aluminum hydroxide with a particle size of 6 μm (prepared in Preparation Example 1-A), 150 g of modified zinc oxide with a particle size of 5 μm (prepared in Preparation Example 1-B), and 0.4 g of a platinum catalyst (an alcohol solution of chloroplatinic acid, with a platinum content of 1 wt%) were mixed to obtain component B;

[0087] (3) Component A and component B are mixed uniformly in a mass ratio of 1:1 to obtain the two-component addition-type thermal conductive gel.

[0088] Example 2-Example 6

[0089] The difference between Examples 2 to 6 and Example 1 is that the selection and dosage of specific raw materials are different, as shown in Table 1. The contents not shown in Table 1 are the same as those in Example 1.

[0090] Table 1

[0091]

[0092]

[0093] Example 7

[0094] The only difference between this embodiment and Example 1 is that the modified aluminum hydroxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified aluminum hydroxide provided in Preparation Example 4-A, and the modified zinc oxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified zinc oxide provided in Preparation Example 4-B.

[0095] Example 8

[0096] The only difference between this embodiment and Example 1 is that the modified aluminum hydroxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified aluminum hydroxide provided in Preparation Example 5-A, and the modified zinc oxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified zinc oxide provided in Preparation Example 5-B.

[0097] Example 9

[0098] The only difference between this embodiment and Example 1 is that the modified aluminum hydroxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified aluminum hydroxide provided in Preparation Example 6-A, and the modified zinc oxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified zinc oxide provided in Preparation Example 6-B.

[0099] Example 10

[0100] The only difference between this embodiment and Example 1 is that the modified aluminum hydroxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified aluminum hydroxide provided in Preparation Example 7-A, and the modified zinc oxide in step (1) and step (2) is replaced by the corresponding equivalent amount of modified zinc oxide provided in Preparation Example 7-B.

[0101] Comparative Example 1

[0102] The only difference between this comparative example and Example 1 is that the modified aluminum hydroxide in step (1) and step (2) is replaced by unmodified aluminum hydroxide (D50 particle size 6 μm).

[0103] Comparative Example 2

[0104] The only difference between this comparative example and Example 1 is that the modified zinc oxide in step (1) and step (2) is replaced by unmodified zinc oxide (D50 particle size 5 μm).

[0105] The performance of the two-component addition-type thermally conductive gel provided in the examples and comparative examples was tested using the following method:

[0106] (1) Tensile strength and elongation at break test: measured in accordance with the provisions of GB / T 528;

[0107] (2) Shore 00 hardness test: Measured in accordance with the provisions of GB / T 531;

[0108] (3) Peel force test: Measured in accordance with the provisions of GB / T 7124;

[0109] (4) Thermal conductivity test: measured in accordance with ISO 22007-2;

[0110] (5) Density test: Determine in accordance with the provisions of GB / T 533;

[0111] (6) Extrusion test: Use a 30cc syringe, a 14# (1.54mm inner diameter) needle, and a pressure of 90psi to test the weight of the glue that flows out within 1 minute;

[0112] (7) Anti-settling (anti-oiling) performance test: Take 200g of component A and 200g of component B glue and put them into disposable plastic cups respectively. After placing them at room temperature (23±2℃) for one month, observe whether there is liquid oil precipitation on the surface; if there is no silicone oil precipitation on the surface, it means that its anti-settling (oiling) performance is good; if silicone oil precipitation is on the surface but cannot flow, it is considered that the anti-oiling performance is average; if silicone oil precipitation is on the surface and the silicone oil is large and can flow, it is considered that the anti-oiling performance is poor.

[0113] The performance test results are shown in Table 2.

[0114] Table 2

[0115]

[0116] As can be seen from Table 2, the two-component addition-type thermal conductive gels provided in Examples 1-6 of the present invention have low density (1.887-1.987 g·cm -3 ) and high thermal conductivity (2.096~2.185W·m -1 ·K -1 ), and also has good extrudability (5.68-6.14g) and anti-settling properties.

[0117] Compared with Example 1, the mechanical properties, extrudability and anti-settling properties of the two-component addition-type thermal conductive gel provided in Comparative Examples 1-2 are significantly worse.

[0118] The applicant states that the present invention uses the above-described embodiments to illustrate the two-component addition-type thermally conductive gel, its preparation method, and its application. However, the present invention is not limited to the above-described embodiments, nor does it necessarily rely on the above-described embodiments for implementation. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for various raw materials in the present invention, addition of auxiliary components, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A two-component addition-type thermally conductive gel, characterized in that: The two-component addition-type thermal conductive gel includes component A and component B; The raw materials for preparing the A component include vinyl silicone oil, terminal hydrogen silicone oil, cross-linked hydrogen silicone oil, thermal conductive filler and inhibitor; The raw materials for preparing the B component include vinyl silicone oil, thermal conductive filler and catalyst; The thermal conductive fillers in the components A and B both include modified aluminum hydroxide and modified zinc oxide; The modified aluminum hydroxide in the component A accounts for 45-60wt% of the total weight of the raw materials for preparing the component A, and the modified zinc oxide in the component A accounts for 25-40wt% of the total weight of the raw materials for preparing the component A; The modified aluminum hydroxide in the B component accounts for 45-60 wt % of the total weight of the raw materials for preparing the B component, and the modified zinc oxide in the B component accounts for 25-40 wt % of the total weight of the raw materials for preparing the B component; The surfaces of the modified aluminum hydroxide and the modified zinc oxide are grafted with hydroxyethyl methacrylate and 3-methacryloxypropyltrimethoxysilane; The modified aluminum hydroxide is prepared by the following method: (1) Using vinyl silane coupling agent hydrolyzate to modify the surface of aluminum hydroxide to obtain a modified intermediate product; (2) adding the modified intermediate product to an emulsifier aqueous solution, mixing, then adding hydroxyethyl methacrylate and a portion of the initiator, and performing a primary polymerization under heating conditions; after the reaction is completed, adding the remaining initiator and 3-methacryloxypropyltrimethoxysilane, performing a secondary polymerization, filtering, washing, and drying to obtain the modified aluminum hydroxide; The modified zinc oxide is prepared by the following method: (1) Using vinyl silane coupling agent hydrolyzate to modify the surface of zinc oxide to obtain a modified intermediate product; (2) adding the modified intermediate product to an emulsifier aqueous solution, mixing, then adding hydroxyethyl methacrylate and a portion of the initiator, and performing a primary polymerization under heating conditions; after the reaction is completed, adding the remaining initiator and 3-methacryloxypropyltrimethoxysilane, performing a secondary polymerization, filtering, washing, and drying to obtain the modified zinc oxide; The weight ratio of component A to component B is (0.8-1.2):

1.

2. The two-component addition-type thermal conductive gel according to claim 1, characterized in that: The average particle size of the modified aluminum hydroxide is 6 to 10 μm.

3. The two-component addition-type thermal conductive gel according to claim 1, characterized in that: The average particle size of the modified zinc oxide is 5 to 10 μm.

4. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The viscosity of the vinyl silicone oil in the component A and the component B is independently 100 to 10,000 mPa·s, and the vinyl content is independently 0.05 to 0.4 mmol / g.

5. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The viscosity of the hydrogen-terminated silicone oil and the cross-linked hydrogen silicone oil is independently 5 to 500 mPa·s.

6. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The content of silicon hydrogen groups in the hydrogen-terminated silicone oil is 0.15 to 2 mmol / g.

7. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The content of silicon hydrogen groups in the cross-linked hydrogen silicone oil is 1 to 10 mmol / g.

8. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The molar ratio of the silicon hydrogen groups in the hydrogen-terminated silicone oil to the vinyl groups in the preparation raw material system is 0.6 to 0.

9.

9. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The molar ratio of the silicon hydrogen groups in the cross-linked hydrogen silicone oil to the vinyl groups in the preparation raw material system is 0.05 to 0.

3.

10. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The molar ratio of silyl groups to vinyl groups in the raw material system is 0.65 to 0.

95.

11. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The inhibitor includes any one of 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane, 1,1,3,3-tetramethyl-1,3-divinylsiloxane, 3-methyl-1-butyn-3-ol, 1-ethynylcyclohexanol, 3-phenyl-1-butyn-3-ol, 3-propyl-1-butyn-3-ol, and 3-octyl-1-butyn-3-ol, or a combination of at least two thereof.

12. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The catalyst includes a platinum catalyst.

13. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The catalyst comprises any one of an alcohol solution of chloroplatinic acid, a platinum catalyst coordinated with tetrahydrofuran, and a platinum catalyst coordinated with divinyltetramethylsiloxane, or a combination of at least two of the above.

14. The two-component addition-type thermally conductive gel according to claim 1, characterized in that: The amount of the catalyst added is 1 to 10 ppm of the total weight of all the raw materials for preparing components A and B.

15. A method for preparing a two-component addition-type thermally conductive gel according to any one of claims 1 to 14, characterized in that: The preparation method comprises the following steps: (1) mixing vinyl silicone oil, terminal hydrogen silicone oil, cross-linked hydrogen silicone oil, thermal conductive filler and inhibitor to obtain the component A; (2) mixing vinyl silicone oil, thermal conductive filler, and catalyst to obtain the B component; (3) Component A and component B are mixed to obtain the two-component addition-type thermal conductive gel.

16. Use of the two-component addition-type thermally conductive gel according to any one of claims 1 to 14 in a new energy battery assembly.

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