Glue-free honeycomb fireproof heat dissipation structure and preparation method thereof

Abstract

The invention provides a glue-free honeycomb fireproof heat dissipation structure and a preparation method thereof. The preparation method of the glue-free honeycomb fireproof heat dissipation structure comprises the following steps: obtaining the honeycomb metal framework; and carrying out multiple dipping-thermocuring operations on the honeycomb metal framework by adopting a macromolecular thermal expansion fireproof heat dissipation material so as to form a fireproof heat-conducting expansion supporting coating on the inner wall of a honeycomb hole of the honeycomb metal framework, thereby obtaining the glue-free honeycomb fireproof heat dissipation structure. According to the method, heat conduction surface glue is not needed, the structure is simplified, and the heat dissipation performance of the glue-free honeycomb fireproof heat dissipation structure is improved; the thickness of the glue-free honeycomb fireproof heat dissipation structure is reduced; the overall weight of the glue-free honeycomb fireproof heat dissipation structure is reduced; and when the fireproof heat-conducting expansion supporting coating is in a high-temperature state, the fireproof heat-conducting expansion supporting coating subjected to thermal expansion can effectively plug honeycomb holes, so that flames and high-temperature flue gas cannot penetrate through the honeycomb holes, and good fireproof plugging performance is achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fire prevention and heat dissipation in the field of new energy applications, and in particular to a glue-free honeycomb fire prevention and heat dissipation structure and a preparation method thereof. Background Art

[0002] New energy vehicles and energy storage systems are currently the hottest areas for new energy applications. Energy storage systems are generally energy storage power stations. At present, energy storage power stations and new energy vehicles mostly rely on battery modules or battery packs to provide power sources. Common battery modules usually include a battery shell and multiple lithium batteries arranged at intervals. Multiple compartments are formed in the battery shell, and a lithium battery is placed in each compartment. Then, multiple lithium batteries are connected in series or in parallel to form a battery module, thereby providing sufficient power requirements for new energy vehicles.

[0003] However, due to the limitation of the loading space of the battery module, when the battery module is running for a long time, the dense arrangement of lithium batteries in the middle of the battery module causes serious heat accumulation in the middle, making the battery module prone to thermal runaway, thus affecting the safety and reliability of the operation of new energy vehicles.

[0004] Therefore, thermal management of the battery module is required. For example, Chinese patent document No. CN 113363618 A discloses a liquid-cooled battery module with a bottom plate having a honeycomb heat dissipation channel. However, the bottom plate of the honeycomb heat dissipation channel in the document only serves as a simple heat dissipation function and cannot provide good fire protection performance.

[0005] For this reason, Chinese patent document No. CN 204998060 U has appeared on the market, which discloses a fireproof and heat-dissipating aluminum honeycomb panel, which uses an aluminum sheet layer combined with a nickel-plated copper sheet layer and a heat-dissipating copper sheet, thereby improving the thermal conductivity and structural strength of the aluminum honeycomb panel; at the same time, with the high thermal conductivity and insulation performance of the thermally conductive double-sided adhesive, the aluminum sheet layer and the nickel-plated copper sheet can fit tightly, effectively improving the fireproof and high-temperature resistance of the aluminum honeycomb panel.

[0006] However, the structure of the aluminum honeycomb panel is relatively complex, and under long-term high temperature conditions, the thermal conductive double-sided adhesive is prone to adhesive failure, resulting in the aluminum sheet layer and the nickel-plated copper sheet layer falling off. Figure 1 It can be seen that the aluminum honeycomb panel is stacked, resulting in a high overall thickness and bulkiness, which cannot be well applied to the development of lightweight battery modules. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a structure that does not require the use of a thermally conductive surface adhesive, which not only simplifies the structure of a glue-free honeycomb fireproof heat dissipation structure, but also improves the heat dissipation performance of the glue-free honeycomb fireproof heat dissipation structure; it also reduces the thickness of the glue-free honeycomb fireproof heat dissipation structure; it also reduces the overall weight of the glue-free honeycomb fireproof heat dissipation structure; it also ensures that when the fire-proof thermally conductive expansion support coating is in a high temperature state, the fire-proof thermally conductive expansion support coating after thermal expansion can effectively block the honeycomb holes, making it impossible for flames and high-temperature smoke to penetrate, thereby achieving a glue-free honeycomb fireproof heat dissipation structure with excellent fireproof performance and a preparation method thereof.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A method for preparing a glue-free honeycomb fireproof heat dissipation structure comprises the following steps:

[0010] Obtain a honeycomb metal skeleton;

[0011] The honeycomb metal skeleton is subjected to multiple dipping-heat curing operations using a polymer thermal expansion fireproof heat dissipation material to form a fireproof heat-conducting expansion support coating on the inner wall of the honeycomb holes of the honeycomb metal skeleton to obtain the glue-free honeycomb fireproof heat dissipation structure.

[0012] In one embodiment, the step of using a polymer thermal expansion fireproof and heat dissipation material to perform multiple impregnation-heat curing operations on the honeycomb metal skeleton includes the following specific steps:

[0013] Placing the honeycomb metal frame in a mold frame to obtain a honeycomb component A to be dipped;

[0014] The honeycomb component A to be impregnated is impregnated with a polymer thermal expansion fireproof heat dissipation material to form the fireproof heat conductive expansion support coating on the inner wall of the honeycomb hole of the honeycomb metal skeleton to obtain a honeycomb fireproof heat dissipation component A;

[0015] Performing a thermal curing operation on the honeycomb fireproof heat dissipation component A to obtain a honeycomb fireproof heat dissipation component B;

[0016] Repeat the above-mentioned impregnation operation and the high-temperature curing operation on the honeycomb fireproof heat dissipation component B in sequence to complete the impregnation-heat curing operation multiple times to obtain a honeycomb fireproof heat dissipation component C;

[0017] The honeycomb fireproof heat dissipation component C is demolded to obtain the glue-free honeycomb fireproof heat dissipation structure.

[0018] In one embodiment, when the above-mentioned dipping operation and the high-temperature curing operation are repeated sequentially on the honeycomb fireproof heat dissipation component B, the number of repetitions is 2 to 5 times; and / or,

[0019] After the step of impregnating the honeycomb component A to be impregnated with a polymer thermal expansion fireproof heat dissipation material and before the step of heat curing the honeycomb fireproof heat dissipation component A, the method for preparing the glue-free honeycomb fireproof heat dissipation structure further comprises the following steps:

[0020] The honeycomb fireproof heat dissipation component A is drained.

[0021] In one embodiment, the conditions of the impregnation operation are: the honeycomb component A to be impregnated is completely immersed in the polymer thermal expansion fireproof and heat dissipation material; the time of the impregnation operation is 0.5min to 3min; the impregnation temperature is 30℃ to 50℃.

[0022] In one embodiment, the conditions of the thermal curing operation are: temperature of 100° C. to 200° C.; time of 5 min to 20 min.

[0023] In one embodiment, 2kg to 10kg of the polymer thermal expansion fireproof and heat dissipation material is used per square meter of the honeycomb holes; and / or,

[0024] The thickness of the fireproof heat-conducting expansion support coating does not exceed 400 μm.

[0025] In one embodiment, the polymer thermal expansion fireproof heat dissipation material includes the following mass fractions:

[0026]

[0027] Wherein, the expansion multiple of the polymer thermal expansion fireproof and heat dissipation material is 15 to 21 times.

[0028] In one embodiment, the heat dissipation filler includes at least one of iron powder, boron nitride, aluminum nitride, silicon carbide, silicon nitride, silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, zirconium oxide and graphite; and / or,

[0029] The thermosetting resin includes at least one of epoxy resin, phenolic resin, polyurethane resin and unsaturated polyester resin; and / or,

[0030] The inorganic flame retardant includes at least one of expandable graphite, aluminum hydroxide, magnesium hydroxide, antimony trioxide, ammonium polyphosphate, 1,3,5-triazine-2,4,6-triamine, sorbitol, starch and pentaerythritol; and / or,

[0031] The organic flame retardant includes at least one of tert-butylated aryl phosphate, hexaphenoxy cyclotriphosphazene, resorcinol bis(diphenyl phosphate) and polysiloxane.

[0032] In one embodiment, the step of obtaining the honeycomb metal framework includes the following specific steps:

[0033] The honeycomb metal frame in the folded state is subjected to a hole-opening operation to form a plurality of heat dissipation holes in the longitudinal direction of the honeycomb metal frame.

[0034] A glue-free honeycomb fireproof heat dissipation structure is prepared by the method for preparing the glue-free honeycomb fireproof heat dissipation structure described in any of the above embodiments.

[0035] Compared with the prior art, the present invention has at least the following advantages:

[0036] 1) By using a honeycomb metal skeleton as the main skeleton, and then using a polymer thermal expansion fireproof heat dissipation material to perform multiple dipping-heat curing operations on the honeycomb metal skeleton, it is ensured that the thickness of the fireproof heat conductive expansion support coating formed after each dipping is relatively thin, thereby effectively reducing the problem of the fireproof heat conductive expansion support coating being easily deformed or cracked due to excessive release of the internal stress of the fireproof heat conductive expansion support coating during subsequent heat curing; and multiple dipping-heat curing operations can ensure that the polymer thermal expansion fireproof heat dissipation material can penetrate deeper and more evenly into the tiny pores of the honeycomb metal skeleton. The gaps are helpful to form a dense, uniform, thin, complete, rounded and highly connected fireproof thermal conductive expansion support coating, which not only improves the connection strength between the fireproof thermal conductive expansion support coating and the inner wall of the honeycomb hole, but also improves the fireproof performance of the fireproof thermal conductive expansion support coating; in this way, there is no need to add additional thermal conductive double-sided adhesive between the fireproof thermal conductive expansion support coating and the honeycomb metal skeleton, which effectively eliminates the use of thermal conductive double-sided adhesive, which not only simplifies the structure of the glue-free honeycomb fireproof heat dissipation structure; but also reduces the problem of aluminum sheet layer and nickel-plated copper sheet layer falling off due to the presence of thermal conductive double-sided adhesive in traditional aluminum honeycomb panels.

[0037] 2) Since the fire-proof thermally conductive expansion support coating is directly fixed and formed on the inner wall of the honeycomb hole, the honeycomb hole space of the honeycomb metal skeleton itself is fully utilized. In this way, without affecting the heat dissipation, the compactness of the honeycomb metal skeleton and the fire-proof thermally conductive expansion support coating structure can be improved, thereby effectively reducing the thickness of the glue-free honeycomb fire-proof heat dissipation structure; and since the weight of the fire-proof thermally conductive expansion support coating is lighter than the weight of the nickel-plated copper plate layer, the overall weight of the glue-free honeycomb fire-proof heat dissipation structure is effectively reduced, which is conducive to the development of lightweight glue-free honeycomb fire-proof heat dissipation structure, so as to be better suitable for the application of lightweight battery modules.

[0038] 3) Since the fireproof thermally conductive expansion support coating has excellent heat dissipation performance, thermal conductivity and thermal expansion performance, when the fireproof thermally conductive expansion support coating is at room temperature, it can not only improve the structural strength of the honeycomb metal skeleton, thereby improving the bending strength of the glue-free honeycomb fireproof heat dissipation structure; but also ensure that the glue-free honeycomb fireproof heat dissipation structure has excellent heat dissipation performance, so that the fireproof thermally conductive expansion support coating can quickly absorb the heat in the middle of the battery module to achieve rapid heat dissipation of the battery module; when the fireproof thermally conductive expansion support coating is in a high temperature state, the fireproof thermally conductive expansion support coating will expand when heated, and since the fireproof thermally conductive expansion support coating is located on the inner wall of the honeycomb hole, the volume of the fireproof thermally conductive expansion support coating after thermal expansion increases, and the fireproof thermally conductive expansion support coating after thermal expansion can effectively block the honeycomb hole, so that flames and high-temperature smoke cannot penetrate, achieving good fireproof performance, and effectively avoiding the problem of flames and high-temperature smoke spreading between adjacent compartments and causing the fire to worsen. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 This is a flow chart of a glue-free honeycomb fireproof heat dissipation structure according to an embodiment of the present invention;

[0041] Figure 2 A schematic structural diagram of a glue-free honeycomb fireproof heat dissipation structure in one direction according to an embodiment of the present invention;

[0042] Figure 3 for Figure 2 A cross-sectional view of the glue-free honeycomb fireproof heat dissipation structure in another direction;

[0043] Figure 4 A cross-sectional view of a glue-free honeycomb fireproof heat dissipation structure in one direction according to another embodiment of the present invention;

[0044] Figure 5 for Figure 4 A schematic structural diagram of the glue-free honeycomb fireproof heat dissipation structure in another direction;

[0045] Figure numerals: 10, glue-free honeycomb fireproof and heat dissipation structure; 100, honeycomb metal skeleton; 110, honeycomb hole; 120, heat dissipation hole; 200, fireproof and thermally conductive expansion support coating; 300, guide tube; 310, inlet; 320, outlet. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0047] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0049] The present disclosure provides a method for preparing a glue-free honeycomb fireproof and heat dissipation structure, comprising the following steps: obtaining a honeycomb metal skeleton; performing multiple impregnation-heat curing operations on the honeycomb metal skeleton using a polymer thermal expansion fireproof and heat dissipation material to form a fireproof and thermally conductive expansion support coating on the inner wall of the honeycomb holes of the honeycomb metal skeleton to obtain the glue-free honeycomb fireproof and heat dissipation structure.

[0050] The preparation method of the above-mentioned glue-free honeycomb fireproof heat dissipation structure uses a honeycomb metal skeleton as the main skeleton, and then uses a polymer thermal expansion fireproof heat dissipation material to perform multiple dipping-heat curing operations on the honeycomb metal skeleton to ensure that the thickness of the fireproof heat-conducting expansion support coating formed after each dipping is relatively thin, thereby effectively reducing the problem that the fireproof heat-conducting expansion support coating is prone to deformation or cracking due to excessive release of the internal stress of the fireproof heat-conducting expansion support coating during subsequent heat curing; and multiple dipping-heat curing operations can ensure that the polymer thermal expansion fireproof heat dissipation material can penetrate deeper and more evenly into the honeycomb metal skeleton. The tiny pores of the honeycomb metal skeleton help to form a dense, uniform, thin, complete, round and high-strength fire-proof thermal conductive expansion support coating, which not only improves the connection strength between the fire-proof thermal conductive expansion support coating and the inner wall of the honeycomb hole, but also improves the fireproof performance of the fire-proof thermal conductive expansion support coating; in this way, there is no need to add additional thermal conductive double-sided tape between the fire-proof thermal conductive expansion support coating and the honeycomb metal skeleton, which effectively eliminates the use of thermal conductive double-sided tape, which not only simplifies the structure of the glue-free honeycomb fire-proof heat dissipation structure; but also reduces the problem of aluminum sheet layer and nickel-plated copper plate layer falling off due to the presence of thermal conductive double-sided tape in traditional aluminum honeycomb panels. Furthermore, since the fireproof thermal conductive expansion support coating is directly fixed and formed on the inner wall of the honeycomb hole, the honeycomb hole space of the honeycomb metal skeleton itself is fully utilized. In this way, without affecting the heat dissipation, the compactness of the honeycomb metal skeleton and the fireproof thermal conductive expansion support coating structure can be improved, thereby effectively reducing the thickness of the glue-free honeycomb fireproof heat dissipation structure; and since the weight of the fireproof thermal conductive expansion support coating is lighter than the weight of the nickel-plated copper plate layer, the overall weight of the glue-free honeycomb fireproof heat dissipation structure is effectively reduced, which is conducive to the development of lightweight glue-free honeycomb fireproof heat dissipation structure, so as to be better suitable for the application of lightweight battery modules. Furthermore, since the fireproof thermally conductive expansion support coating has excellent heat dissipation performance, thermal conductivity and thermal expansion performance, when the fireproof thermally conductive expansion support coating is at room temperature, it can not only improve the structural strength of the honeycomb metal skeleton, thereby improving the bending strength of the glue-free honeycomb fireproof heat dissipation structure; but also ensure that the glue-free honeycomb fireproof heat dissipation structure has excellent heat dissipation performance, so that the fireproof thermally conductive expansion support coating can quickly absorb the heat in the middle of the battery module to achieve rapid heat dissipation of the battery module; when the fireproof thermally conductive expansion support coating is in a high temperature state, the fireproof thermally conductive expansion support coating will expand when heated, and since the fireproof thermally conductive expansion support coating is located on the inner wall of the honeycomb hole, the volume of the fireproof thermally conductive expansion support coating after thermal expansion increases, and the fireproof thermally conductive expansion support coating after thermal expansion can effectively block the honeycomb hole, so that flames and high-temperature smoke cannot penetrate, thereby achieving good fireproof performance, and effectively avoiding the problem of flames and high-temperature smoke spreading between adjacent compartments and causing the fire to worsen.

[0051] See also Figure 1In order to better understand the technical solution and beneficial effects of the present disclosure, the present disclosure is further described in detail below in conjunction with specific embodiments. A method for preparing a glue-free honeycomb fireproof heat dissipation structure in one embodiment includes some or all of the following steps:

[0052] S101, obtaining a honeycomb metal frame 100 for future use.

[0053] It can be understood that since the honeycomb metal skeleton 100 is distributed with a plurality of honeycomb holes 110 in a matrix, Figure 2 and Figure 4 As shown, the honeycomb metal skeleton 100 has a better buffering effect, and the matrix distribution of multiple honeycomb holes 110 also ensures that the lateral strength of the honeycomb metal skeleton 100 is high, so that the honeycomb metal skeleton 100 can be used as an anti-buffering partition plate of the battery module to ensure that when the battery module faces severe impact conditions, the honeycomb metal skeleton 100 can provide a good buffering effect for the lithium batteries in the adjacent compartments, and effectively avoid the problem of damage caused by collision between the lithium batteries and the partition plates without anti-buffering.

[0054] In one embodiment, the honeycomb metal frame 100 is a foldable honeycomb metal frame 100, so as to ensure that the honeycomb metal frame 100 is lightweight and easy to fold, which is conducive to the subsequent preparation of a lightweight glue-free honeycomb fireproof heat dissipation structure 10. In addition, the foldable honeycomb metal frame 100 facilitates the subsequent rapid batch opening operation, thereby improving the opening efficiency of the honeycomb metal frame 100.

[0055] It can be understood that the multiple honeycomb holes 110 distributed in a matrix of the honeycomb metal skeleton 100 only improve the heat dissipation performance of the vertical Z plane in the thickness direction of the glue-free honeycomb fireproof heat dissipation structure 10, but cannot improve the heat dissipation performance of the horizontal plane in the thickness direction of the glue-free honeycomb fireproof heat dissipation structure 10, especially for the glue-free honeycomb fireproof heat dissipation structure 10 with a relatively large length and width, the heat inside the glue-free honeycomb fireproof heat dissipation structure 10 cannot be circulated quickly, that is, the heat stays in the glue-free honeycomb fireproof heat dissipation structure 10 for a relatively long time, which causes the local performance of the glue-free honeycomb fireproof heat dissipation structure 10 to become low, affecting the need to replace the glue-free honeycomb fireproof heat dissipation structure 10, that is, shortening the service life of the glue-free honeycomb fireproof heat dissipation structure 10.

[0056] Therefore, in one embodiment, the step of obtaining the honeycomb metal skeleton 100 includes the following specific steps: performing a hole-opening operation on the honeycomb metal skeleton 100 in a folded state, so as to quickly complete the hole-opening operation on the honeycomb metal skeleton 100 in batches, thereby forming a plurality of heat dissipation holes 120 in the longitudinal direction of the honeycomb metal skeleton 100, such as Figure 2 , Figure 3 and Figure 4As shown, in this way, it is ensured that the vertical Z plane and the horizontal plane in the thickness direction of the glue-free honeycomb fireproof heat dissipation structure 10 prepared subsequently have heat dissipation performance, so that the internal heat of the glue-free honeycomb fireproof heat dissipation structure 10 can quickly diffuse to the outside, thereby improving the service life of the glue-free honeycomb fireproof heat dissipation structure 10.

[0057] It can be understood that if the proportion of the multiple honeycomb holes 110 in the honeycomb metal skeleton 100 is less than 90%, rapid heat dissipation cannot be achieved. If the proportion of the multiple honeycomb holes 110 in the honeycomb metal skeleton 100 is higher than 98%, the honeycomb metal skeleton 100 cannot effectively guarantee the overall structural strength of the honeycomb metal skeleton 100 due to the high proportion of the multiple honeycomb holes 110. Therefore, in one of the embodiments, the thickness of the honeycomb metal skeleton 100 is 3mm to 25mm; the length is 10cm to 300cm; the width is 10cm to 120cm; the honeycomb hole 110 is a regular polygon, and the aperture of the honeycomb hole 110 is 4mm to 16mm; the wall thickness of the honeycomb hole 110 is 0.03mm to 0.5mm; to ensure that the plurality of honeycomb holes 110 account for 90% to 98% of the honeycomb metal skeleton 100, which is conducive to the subsequent preparation of a lightweight glue-free honeycomb fireproof heat dissipation structure 10 with high heat dissipation performance, good fireproof performance, good anti-buffering effect and simple structure, which is particularly suitable for the application of battery modules of high-power new energy electric vehicles.

[0058] It can also be understood that since the multiple honeycomb holes 110 account for 90% to 98% of the honeycomb metal skeleton 100, the highly distributed honeycomb holes 110 can effectively reduce the thickness of the honeycomb metal skeleton 100 after folding, which is beneficial for the drill bit to pass through quickly, accurately and labor-savingly during batch processing, which not only ensures the efficiency of drilling, but also ensures the accuracy of drilling, and effectively avoids the problem of large drilling deviation or deformation of the honeycomb metal skeleton 100 caused by the offset of the drill bit due to the thick thickness during batch processing.

[0059] In a preferred embodiment, the proportion of the plurality of honeycomb holes 110 in the honeycomb metal skeleton 100 is 95% to 98%. Specifically, the proportion of the plurality of honeycomb holes 110 in the honeycomb metal skeleton 100 may be 95%, 96%, 97%, or 98%.

[0060] It can be understood that if the proportion of the multiple heat dissipation holes 120 in the honeycomb metal skeleton 100 is less than 20%, a rapid heat dissipation effect cannot be achieved; if the proportion of the multiple heat dissipation holes 120 in the honeycomb metal skeleton 100 is higher than 50%, the honeycomb metal skeleton 100 will be unable to effectively guarantee the overall structural strength of the honeycomb metal skeleton 100 due to the high proportion of the multiple heat dissipation holes 120. Therefore, in one of the embodiments, when the honeycomb metal skeleton 100 in the folded state is subjected to the hole opening operation, the spacing between each heat dissipation hole 120 is controlled to be 5 mm to 30 mm, and the aperture of the heat dissipation hole 120 is 3 mm to 10 mm, so that the multiple heat dissipation holes 120 can be evenly distributed in the longitudinal direction of the honeycomb metal skeleton 100, so as to ensure that the multiple heat dissipation holes 120 account for 20% to 50% of the honeycomb metal skeleton 100, especially when the multiple honeycomb holes 110 account for 95% to 98% of the honeycomb metal skeleton 100. In this way, while improving the heat dissipation effect of the honeycomb metal skeleton 100, it is also ensured that the overall structural strength of the honeycomb metal skeleton 100 will not decrease.

[0061] In a preferred embodiment, the plurality of heat dissipation holes 120 account for 30% to 40% of the honeycomb metal skeleton 100. Specifically, the plurality of heat dissipation holes 120 account for 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40% of the honeycomb metal skeleton 100.

[0062] In one of the embodiments, every two adjacent heat dissipation holes 120 are staggered so that one of the heat dissipation holes 120 is close to the first side of the honeycomb metal skeleton 100, and the other heat dissipation hole 120 is close to the second side of the honeycomb metal skeleton 100. In this way, the multiple heat dissipation holes 120 can form mutually staggered heat dissipation channels in the horizontal X-plane in the thickness direction of the glue-free honeycomb fire-proof heat dissipation structure 10 to achieve faster heat dissipation.

[0063] In one embodiment, the honeycomb metal skeleton 100 is a soft and hard honeycomb metal skeleton 100, so as to ensure that the soft and hard honeycomb metal skeleton 100 has both softness and good hardness, which is convenient for folding the soft and hard honeycomb metal skeleton 100 on the one hand; on the other hand, it is ensured that the soft and hard honeycomb metal skeleton 100 after unfolding has good mechanical properties and stability, so as to provide good support for the fireproof thermal conductive expansion support coating 200. In addition, the structural strength of the soft and hard honeycomb metal skeleton 100 is relatively moderate, which is conducive to the rapid, accurate and labor-saving penetration of the drill bit during batch processing, which not only ensures the efficiency of drilling, but also ensures the accuracy of drilling, and effectively avoids the problem of large drilling deviation or deformation of the honeycomb metal skeleton 100 caused by the offset of the drilling due to the thick thickness of the drill bit during batch processing.

[0064] In one of the embodiments, since the soft and hard honeycomb metal skeleton 100 can be a 5 series aluminum-magnesium alloy honeycomb metal skeleton or a 4 series aluminum-silicon alloy honeycomb metal skeleton, it is ensured that the soft and hard honeycomb metal skeleton 100 has good soft and hard properties, thereby ensuring that the soft and hard honeycomb metal skeleton 100 has good folding performance. At the same time, it is also convenient for the operator to quickly complete batch drilling operations, thereby avoiding the problem of deformation of the soft and hard honeycomb metal skeleton 100 during drilling operations.

[0065] Specifically, in one of the embodiments, the 5 series aluminum-magnesium alloy honeycomb metal frame is 5052; and the 4 series aluminum-silicon alloy honeycomb metal frame is 4043.

[0066] In one embodiment, the heat dissipation holes 120 are arranged through the horizontal Y plane in the thickness direction of the honeycomb metal skeleton 100 to form a continuous heat dissipation channel, so as to achieve faster heat dissipation of the glue-free honeycomb fireproof heat dissipation structure 10.

[0067] like Figure 4 and Figure 5 As shown, in one embodiment, the plurality of heat dissipation holes 120 can also be used to install the guide tube 300, especially in conjunction with the application of the liquid cooling system, to achieve a faster heat dissipation effect for the battery module. In addition, when used in conjunction with the soft and hard honeycomb metal skeleton 100, it is convenient for the operator to bend and install the guide tube 300, thereby reducing the difficulty of the operator to install the guide tube 300 due to the hardness of the soft and hard honeycomb metal skeleton 100 being too high or too low.

[0068] In one embodiment, the flow guide tube 300 is a metal flow guide tube 300. Further, the metal flow guide tube 300 is an aluminum alloy flow guide tube 300.

[0069] In one embodiment, the metal flow guide tube 300 includes an inlet 310 and an outlet 320. The inlet 310 is used for the liquid cooling medium to enter, and the outlet 320 is used for the liquid cooling medium to flow out. In this way, the circulation flow of the liquid cooling medium is achieved, further improving the heat dissipation cycle performance of the glue-free honeycomb fireproof heat dissipation structure 10.

[0070] like Figure 2 and Figure 3 As shown, in some other embodiments, a plurality of heat dissipation holes 120 are used in conjunction with an external air cooling system to achieve a faster heat dissipation effect for the battery module.

[0071] In one embodiment, the soft and hard honeycomb metal frame 100 is a soft and hard honeycomb aluminum frame. Since aluminum is light and strong compared to other metals, it is not only easy for operators to fold, but also conducive to preparing a lightweight and glue-free honeycomb fireproof heat dissipation structure 10.

[0072] S102, using a polymer thermal expansion fireproof heat dissipation material to perform multiple dipping-heat curing operations on the honeycomb metal skeleton 100 to form a fireproof heat-conducting expansion support coating 200 on the inner wall of the honeycomb hole 110 of the honeycomb metal skeleton 100, so as to obtain the glue-free honeycomb fireproof heat dissipation structure 10.

[0073] It should be noted that if the honeycomb metal skeleton 100 is impregnated for a long time with a polymer thermal expansion fireproof and heat dissipation material and then subjected to a heat curing operation, not only will there be a problem of uneven impregnation, but the long-term impregnation will also form a thicker fireproof and heat-conductive expansion support coating 200, which will lead to excessive release of the internal stress of the fireproof and heat-conductive expansion support coating 200 during the subsequent heat curing, causing the fireproof and heat-conductive expansion support coating 200 to be easily deformed or cracked. Therefore, in the present disclosure, the honeycomb metal skeleton 100 is impregnated and heat-cured with a polymer thermal expansion fireproof and heat dissipation material for multiple times to ensure that the thickness of the fireproof and heat-conductive expansion support coating 200 formed after each impregnation is relatively thin, thereby effectively reducing the problem of the fireproof and heat-conductive expansion support coating 200 being easily deformed or cracked due to excessive release of the internal stress of the fireproof and heat-conductive expansion support coating 200 during the subsequent heat curing; and multiple impregnation and heat curing operations can ensure that the polymer thermal expansion fireproof and heat dissipation material can penetrate deeper and more evenly into the tiny pores of the honeycomb metal skeleton 100, which is helpful The formation of a dense, uniform, thin, complete, round, and highly connected fireproof thermal expansion support coating 200 not only improves the connection strength between the fireproof thermal expansion support coating 200 and the inner wall of the honeycomb hole 110, but also improves the fireproof performance of the fireproof thermal expansion support coating 200. In this way, there is no need to add additional thermal conductive double-sided adhesive between the fireproof thermal conductive expansion support coating 200 and the honeycomb metal skeleton 100, which effectively eliminates the need for using the thermal conductive double-sided adhesive. This not only simplifies the structure of the glue-free honeycomb fireproof heat dissipation structure 10, but also reduces the problem of aluminum sheet layers and nickel-plated copper sheet layers falling off due to the presence of thermal conductive double-sided adhesive in traditional aluminum honeycomb panels.

[0074] It can also be understood that since the fire-proof thermally conductive expansion support coating 200 is directly fixed and formed on the inner wall of the honeycomb hole 110, the honeycomb hole 110 space of the honeycomb metal skeleton 100 itself is fully utilized. In this way, without affecting the heat dissipation, the compactness of the structure of the honeycomb metal skeleton 100 and the fire-proof thermally conductive expansion support coating 200 can be improved, thereby effectively reducing the thickness of the glue-free honeycomb fire-proof heat dissipation structure 10; and since the weight of the fire-proof thermally conductive expansion support coating 200 is lighter than the weight of the nickel-plated copper plate layer, the overall weight of the glue-free honeycomb fire-proof heat dissipation structure 10 is effectively reduced, which is conducive to the development of lightweight glue-free honeycomb fire-proof heat dissipation structure 10, so as to be better suitable for the application of lightweight battery modules.

[0075] It can also be understood that since the fireproof thermally conductive expansion support coating 200 has excellent heat dissipation performance, thermal conductivity and thermal expansion performance, when the fireproof thermally conductive expansion support coating 200 is at room temperature, it can not only improve the structural strength of the honeycomb metal skeleton 100, thereby improving the bending strength of the glue-free honeycomb fireproof heat dissipation structure 10; but also ensure that the glue-free honeycomb fireproof heat dissipation structure 10 has excellent heat dissipation performance, so that the fireproof thermally conductive expansion support coating 200 can quickly absorb the heat in the middle of the battery module to achieve rapid heat dissipation of the battery module; when the fireproof When the fire-proof thermal expansion supporting coating 200 is in a high temperature state, the fire-proof thermal expansion supporting coating 200 will expand when heated, and because the fire-proof thermal expansion supporting coating 200 is located on the inner wall of the honeycomb hole 110, the volume of the fire-proof thermal expansion supporting coating 200 after thermal expansion increases, and the fire-proof thermal expansion supporting coating 200 after thermal expansion can effectively block the honeycomb hole 110, so that flames and high-temperature smoke cannot penetrate, thereby achieving good fireproof performance and effectively avoiding the problem of flames and high-temperature smoke spreading between adjacent compartments and causing the fire to worsen.

[0076] In one embodiment, the step of using the polymer thermal expansion fireproof and heat dissipation material to perform multiple impregnation-heat curing operations on the honeycomb metal skeleton 100 includes the following specific steps:

[0077] S1021, placing the honeycomb metal skeleton 100 in a mold frame to obtain a honeycomb component A to be dipped.

[0078] It can be understood that if the honeycomb metal skeleton 100 is directly impregnated, the honeycomb metal skeleton 100 is prone to swing during the impregnation process due to the easy folding of the honeycomb metal skeleton 100, resulting in a large impregnation blind area on the inner wall of the honeycomb hole 110, which causes the inner wall of the honeycomb hole 110 to be unable to form a complete fireproof heat-conducting expansion support coating 200. Therefore, in the present disclosure, the honeycomb metal skeleton 100 is placed in a mold frame to obtain a honeycomb component A to be impregnated, so as to ensure that the honeycomb metal skeleton 100 can be fully expanded, thereby reducing the impregnation blind area of ​​the inner wall of the honeycomb hole 110, on the one hand, improving the impregnation efficiency of the honeycomb metal skeleton 100; on the other hand, ensuring that a complete fireproof heat-conducting expansion support coating 200 is formed on the inner wall of the honeycomb hole 110.

[0079] In one of the embodiments, the honeycomb metal skeleton 100 is fully expanded and then placed on the lower frame of the mold frame, and then the upper frame of the mold frame is tightly covered on top of the honeycomb metal skeleton 100, and all the honeycomb holes 110 of the honeycomb metal skeleton 100 are exposed to ensure that all the honeycomb holes 110 of the honeycomb metal skeleton 100 can be completely immersed in the polymer thermal expansion fireproof and heat dissipation material.

[0080] In one embodiment, the mold frame includes an upper frame and a lower frame that are snap-fitted together, and the upper frame or the lower frame is correspondingly formed with a hollow mounting groove so that when the honeycomb metal skeleton 100 is clamped between the upper frame and the lower frame, all the honeycomb holes 110 of the honeycomb metal skeleton 100 are exposed.

[0081] In one embodiment, the upper frame and the lower frame are detachably arranged by threads, so that the operator can disassemble and assemble them.

[0082] S1022, using a polymer thermal expansion fireproof heat dissipation material to impregnate the honeycomb component A to be impregnated, so as to preliminarily form the fireproof heat-conducting expansion support coating 200 on the inner wall of the honeycomb hole 110 of the honeycomb metal skeleton 100, and obtain the honeycomb fireproof heat dissipation component A.

[0083] S1023, performing a thermal curing operation on the honeycomb fireproof heat dissipation component A, so that the fireproof thermal conductive expansion support coating 200 can be fixedly formed on the inner wall of the honeycomb hole 110, and obtaining the honeycomb fireproof heat dissipation component B.

[0084] S1024, repeating the above-mentioned impregnation operation and the high-temperature curing operation on the honeycomb fireproof heat dissipation component B in sequence to complete multiple impregnation-heat curing operations to obtain a honeycomb fireproof heat dissipation component C.

[0085] It can be understood that when the honeycomb fireproof and heat dissipation component B repeats the above-mentioned dipping operation and the high-temperature curing operation in sequence, the newly impregnated polymer thermal expansion fireproof and heat dissipation material can penetrate well into the newly cured fireproof and thermal conductive expansion support coating 200 each time, which helps to form a dense, thin, complete and round fireproof and thermal conductive expansion support coating 200.

[0086] S1025, demolding the honeycomb fireproof heat dissipation component C to obtain the glue-free honeycomb fireproof heat dissipation structure 10. It can be understood that after the honeycomb fireproof heat dissipation component C completes multiple impregnations and multiple thermal curings, the operator manually loosens the upper frame and then takes out the glue-free honeycomb fireproof heat dissipation structure 10.

[0087] If the number of multiple dipping-heat curing operations is too many, the thickness of the fire-proof thermal conductive expansion support coating 200 will be too thick, resulting in smaller remaining gaps in the honeycomb holes 110 and affecting the heat dissipation performance of the glue-free honeycomb fire-proof heat dissipation structure 10 at room temperature; if the number of multiple dipping-heat curing operations is too few, a dense fire-proof thermal conductive expansion support coating 200 cannot be formed in the honeycomb holes 110, resulting in the fire-proof performance of the glue-free honeycomb fire-proof heat dissipation structure 10 at high temperatures. Therefore, in one of the embodiments, when the above-mentioned dipping operation and the high-temperature curing operation are repeated in sequence on the honeycomb fireproof heat dissipation component B, the number of repetitions is 2 to 5 times; to ensure that a fireproof thermal conductive expansion support coating 200 with a thickness not exceeding 400 μm is formed on the honeycomb hole 110, especially in conjunction with the use of the polymer thermal expansion fireproof heat dissipation material with an expansion multiple of 15 to 21 times, while ensuring that the glue-free honeycomb fireproof heat dissipation structure 10 has a higher heat dissipation performance at room temperature, it also ensures that the glue-free honeycomb fireproof heat dissipation structure 10 can better seal the honeycomb hole 110 at a high temperature to achieve good fireproof performance.

[0088] After the step of impregnating the honeycomb component A to be impregnated with the polymer thermal expansion fireproof and heat dissipation material, and before the step of heat curing the honeycomb fireproof and heat dissipation component A, the preparation method of the glue-free honeycomb fireproof and heat dissipation structure 10 also includes the following steps: draining the honeycomb fireproof and heat dissipation component A to reduce the residue of the polymer thermal expansion fireproof and heat dissipation material, which is conducive to forming a dense, uniform, thin, complete and round fireproof thermal conductive expansion support coating 200 with high connection strength, and reducing the waste of polymer thermal expansion fireproof and heat dissipation materials.

[0089] In one embodiment, the conditions of the dipping operation are as follows: the honeycomb component A to be dipped is completely immersed in the polymer thermal expansion fireproof heat dissipation material to ensure that a fireproof heat conductive expansion support coating 200 is formed in all honeycomb holes 110 of the honeycomb metal skeleton 100, especially when the dipping operation time is 0.5min to 3min; the dipping temperature is 30°C to 50°C to ensure that the polymer thermal expansion fireproof heat dissipation material can penetrate deeply and evenly into the inner wall of the honeycomb hole 110, thereby facilitating the formation of a dense, uniform, thin, complete, rounded and high-connection-strength fireproof heat conductive expansion support coating 200, while also ensuring the high efficiency of the dipping.

[0090] It should be noted that if the honeycomb fireproof heat dissipation component B after the heat curing operation is directly impregnated, since the temperature of the honeycomb fireproof heat dissipation component B after the first impregnation-heat curing operation is relatively high, and the impregnation temperature is 30°C~50°C, the temperature difference when the honeycomb fireproof heat dissipation component B is subjected to the second impregnation-heat curing operation is relatively large, which can easily cause the fireproof thermal conductive expansion support coating 200 formed by the heat curing to crack in the polymer thermal expansion fireproof heat dissipation material with a large temperature difference, or the polymer thermal expansion fireproof heat dissipation material just immersed will directly solidify and cause unevenness. Therefore, in the present disclosure, after each heat curing operation is completed, the honeycomb fireproof heat dissipation component B needs to be cooled. After the honeycomb fireproof heat dissipation component B is cooled to room temperature, the honeycomb fireproof heat dissipation component B is immediately placed in a polymer thermal expansion fireproof heat dissipation material for the next round of impregnation-heat curing operation. In this way, it is ensured that the polymer thermal expansion fireproof heat dissipation material can penetrate deeply and evenly into the inner wall of the honeycomb hole 110 to form a dense, uniform, thin, complete, round and high-connection-strength fireproof thermal expansion support coating 200, which is beneficial for the preparation of a lightweight glue-free honeycomb fireproof heat dissipation structure 10.

[0091] It should also be noted that when the honeycomb fireproof heat dissipation component B is immediately placed in a polymer thermal expansion fireproof heat dissipation material after it is cooled to room temperature, the honeycomb fireproof heat dissipation component B cooled to room temperature has a small amount of residual temperature, thereby ensuring the micro-expansion state of the newly solidified fireproof thermal conductive expansion support coating 200. This can better increase the area of ​​the newly solidified fireproof thermal conductive expansion support coating 200, which is beneficial for the polymer thermal expansion fireproof heat dissipation material to penetrate deeply and evenly into the gaps of the newly solidified fireproof thermal conductive expansion support coating 200, thereby facilitating the formation of a dense, uniform, thin, complete, rounded, and high-strength fireproof thermal conductive expansion support coating 200.

[0092] In one of the embodiments, in step S1024, when the above-mentioned impregnation operation and the high-temperature curing operation are repeated in sequence on the honeycomb fireproof heat dissipation component B, after completing a single impregnation-heat curing operation, the honeycomb fireproof heat dissipation component B needs to be cooled to room temperature and immediately placed in the next round of impregnation-heat curing operation, and this is repeated continuously to complete multiple impregnation-heat curing operations.

[0093] In one of the embodiments, the conditions of the heat curing operation are: temperature of 100°C to 200°C; time of 5min to 20min, so as to achieve rapid and sufficient curing of the polymer thermal expansion fireproof and heat dissipation material, which is conducive to forming a dense, uniform, thin, complete and round fireproof and heat-conductive expansion support coating 200 with high connection strength.

[0094] In one of the embodiments, 2kg to 10kg of the polymer thermal expansion fireproof and heat dissipation material is used per square meter of the honeycomb hole 110 to ensure that a small amount of the polymer thermal expansion fireproof and heat dissipation material can form a fireproof thermal conductive expansion support coating 200 with a thickness not exceeding 400μm after multiple dipping-heat curing operations. In this way, while saving the polymer thermal expansion fireproof and heat dissipation material, a dense, uniform, thin, complete and round fireproof thermal conductive expansion support coating 200 with high connection strength is formed on the inner wall of the honeycomb hole 110, thereby ensuring that the glue-free honeycomb fireproof and heat dissipation structure 10 has a higher heat dissipation performance at room temperature, and also ensuring that the glue-free honeycomb fireproof and heat dissipation structure 10 can better seal the honeycomb hole 110 at high temperature to achieve good fireproof performance.

[0095] In one embodiment, 5kg to 10kg of the polymer thermal expansion fireproof heat dissipation material is used per square meter of the honeycomb hole 110 to ensure that a small amount of the polymer thermal expansion fireproof heat dissipation material can form a fireproof heat conductive expansion support coating 200 with a thickness of 300μm to 400μm after multiple dipping-heat curing operations, especially with the use of the polymer thermal expansion fireproof heat dissipation material with an expansion multiple of 15 to 21 times. In this way, while effectively saving the polymer thermal expansion fireproof heat dissipation material, it is also ensured that a dense, uniform, thin, complete, rounded and strongly connected inner wall of the honeycomb hole 110 is formed. The high-strength fireproof thermal conductive expansion support coating 200 ensures that the glue-free honeycomb fireproof heat dissipation structure 10 has a high heat dissipation performance at room temperature, while ensuring that the glue-free honeycomb fireproof heat dissipation structure 10 can just completely block the honeycomb holes 110 at high temperatures, so that flames and high-temperature smoke cannot penetrate, so as to achieve good fireproof performance, and also reduces the squeezing force of the expanded fireproof thermal conductive expansion support coating 200 on the inner wall of the honeycomb hole 110, thereby ensuring that the honeycomb metal skeleton 100 can still maintain good structural strength under high temperature for a long time, thereby improving the fireproof performance of the glue-free honeycomb fireproof heat dissipation structure 10.

[0096] In one of the embodiments, the polymer thermal expansion fireproof and heat dissipation material includes the following parts by mass: 30 to 40 parts of thermosetting resin; 15 to 20 parts of inorganic flame retardant; 5 to 10 parts of organic flame retardant; 1 to 10 parts of smoke suppressant; 15 to 30 parts of heat dissipation filler; wherein the expansion multiple of the polymer thermal expansion fireproof and heat dissipation material is 15 to 21 times.

[0097] It can be understood that, since thermosetting resin is a thermally conductive interface material, it can penetrate deeply and evenly into the inner wall of the honeycomb hole 110, thereby reducing the thermal resistance of the fire-proof thermally conductive expansion support coating 200, thereby improving the thermal conductivity of the fire-proof thermally conductive expansion support coating 200; and since thermosetting resin has good adhesion and chemical corrosion resistance, the fire-proof thermally conductive expansion support coating 200 can also maintain good stability in high temperature and humid environments, so as to ensure that the battery module can be better suitable for applications in harsh environments such as high temperature and humid environments; especially in conjunction with the use of heat dissipation fillers, not only the thermal conductivity of the fire-proof thermally conductive expansion support coating 200 is improved, but also the addition of heat dissipation fillers can improve the structural strength of the fire-proof thermally conductive expansion support coating 200, thereby improving the overall bending strength of the glue-free honeycomb fireproof heat dissipation structure 10, and then ensuring that the prepared glue-free honeycomb fireproof heat dissipation structure 10 has good structural strength, so as to provide better support for the battery module, and ensure that the battery module is not easily deformed under severe impact.

[0098] It can also be understood that by compounding 30 to 40 parts of thermosetting resin, 15 to 20 parts of inorganic flame retardant, 5 to 10 parts of organic flame retardant, 1 to 10 parts of smoke suppressant and 15 to 30 parts of heat dissipation filler, the expansion multiple of the prepared polymer thermal expansion fireproof heat dissipation material can be ensured to be between 15 and 21 times. In this way, a thinner fireproof and thermally conductive expansion support coating 200 is formed to have higher heat dissipation performance at room temperature, while ensuring that the glue-free honeycomb fireproof heat dissipation structure 10 can better seal the honeycomb holes 110 at high temperatures to achieve good fireproof performance.

[0099] In one embodiment, the heat dissipation filler includes at least one of iron powder, boron nitride, aluminum nitride, silicon carbide, silicon nitride, silicon dioxide, aluminum oxide, zinc oxide and magnesium oxide, zirconium oxide and graphite, so as to ensure that the added heat dissipation filler has good heat dissipation performance and good structural strength, thereby improving the structural strength and heat dissipation performance of the fire-proof thermal conductive expansion support coating 200, thereby improving the overall bending strength and heat dissipation performance of the glue-free honeycomb fire-proof heat dissipation structure 10.

[0100] In one embodiment, the thermosetting resin includes at least one of epoxy resin, phenolic resin, polyurethane resin and unsaturated polyester resin, so as to ensure that the added thermosetting resin has good thermal conductivity and adhesion properties.

[0101] In one embodiment, the inorganic flame retardant includes at least one of expandable graphite, aluminum hydroxide, magnesium hydroxide, antimony trioxide, ammonium polyphosphate, 1,3,5-triazine-2,4,6-triamine, sorbitol, starch and pentaerythritol.

[0102] In one embodiment, the organic flame retardant includes at least one of tert-butylated aryl phosphate, hexaphenoxy cyclotriphosphazene, resorcinol bis(diphenyl phosphate) and polysiloxane.

[0103] In one embodiment, the smoke suppressant includes at least one of ferric oxide, furfuryl alcohol, carbodiimide, zinc stannate, magnesium-zinc complex and molybdate.

[0104] In one of the embodiments, the preparation of a polymer thermal expansion fireproof and heat dissipation material includes the following steps: adding a thermosetting plastic and an organic flame retardant into a vacuum stirring reactor and stirring at a low speed for 5 minutes to 20 minutes at normal pressure and a temperature of 50°C to 90°C, and then adding an inorganic flame retardant, a smoke suppressant and a heat dissipation filler and stirring at a high speed for 5 minutes to 15 minutes; after mixing, observing that there are no obvious solid particles on the surface of the mixture in the vacuum stirring reactor, turning on the vacuum stirring to control the vacuum degree to -0.085Mpa to -0.065Mpa, and maintaining high-speed stirring for 20 minutes to 30 minutes to remove bubbles in the mixture, thereby preparing a polymer thermal expansion fireproof and heat dissipation material that is evenly mixed and free of bubbles.

[0105] In one embodiment, the order of adding the inorganic flame retardant, the smoke suppressant and the heat dissipation filler is inorganic flame retardant, smoke suppressant, heat dissipation filler.

[0106] In one embodiment, the stirring speed of the low-speed stirring is 300 rpm / min to 500 rpm / min; the stirring speed of the high-speed stirring is 800 rpm / min to 1500 rpm / min.

[0107] The present disclosure also provides a glue-free honeycomb fireproof heat dissipation structure 10, which is prepared by the preparation method of the glue-free honeycomb fireproof heat dissipation structure 10 described in any of the above embodiments, and can form a dense, uniform, thin, complete and round fireproof thermal conductive expansion support coating 200 with high connection strength in the honeycomb holes 110 of the honeycomb metal skeleton 100, thereby ensuring that the glue-free honeycomb fireproof heat dissipation structure 10 has a high heat dissipation performance at room temperature, and also ensures that the glue-free honeycomb fireproof heat dissipation structure 10 can just completely block the honeycomb holes 110 at high temperatures, so that flames and high-temperature smoke cannot penetrate, so as to achieve good fireproof performance, and also reduce the squeezing force of the expanded fireproof thermal conductive expansion support coating 200 on the inner wall of the honeycomb hole 110, thereby ensuring that the honeycomb metal skeleton 100 can still maintain good structural strength under high temperature for a long time, thereby improving the fireproof performance of the glue-free honeycomb fireproof heat dissipation structure 10.

[0108] Some specific examples are given below, and if % is mentioned, it means percentage by weight. It should be noted that the following examples do not exhaust all possible situations, and the materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0109] Table 1 Recipe

[0110]

[0111] Preparation method of the glue-free honeycomb fireproof heat dissipation structure of Example 1:

[0112] S1. Preparation of polymer thermal expansion fireproof and heat dissipation materials:

[0113] S11, weighing according to the formula in Table 1, adding thermosetting resin (polyurethane resin, epoxy resin or phenolic resin) and organic flame retardant (tert-butylated aryl phosphate) into a vacuum stirring reactor, and stirring at a low speed of 300 rpm / min for 10 min at normal pressure and a temperature of 60° C.;

[0114] S12, adding inorganic flame retardant (expandable graphite, antimony trioxide), molybdate smoke suppressant and heat dissipation filler (iron powder, zirconium oxide and aluminum (magnesium) nitride) and stirring at 800 rpm / min for 12 min, observing that there are no obvious solid particles on the surface of the mixture in the vacuum stirring reactor, turning on vacuum stirring to control the vacuum degree to -0.085 MPa, maintaining high-speed stirring at 1000 rpm / min for 20 min to remove bubbles in the mixture, and preparing a polymer thermal expansion fireproof heat dissipation material that is evenly mixed and free of bubbles;

[0115] S13, transferring the prepared polymer thermal expansion fireproof and heat dissipation material into an immersion tank to prepare for the next step;

[0116] S2. Obtaining the honeycomb aluminum frame:

[0117] S21, the honeycomb aluminum skeleton is a folded soft and hard honeycomb aluminum skeleton (4 series 4043), with a thickness of 25 mm, a length of 30 cm, and a width of 20 cm; the honeycomb hole 110 is a regular hexagon, and the aperture of the honeycomb hole 110 is 10 mm, and the wall thickness of the honeycomb hole 110 is 0.06 mm; the honeycomb holes 110 account for 98% of the honeycomb aluminum skeleton as the main frame;

[0118] S22, perform batch hole opening operation on the honeycomb aluminum skeleton in the folded state, control the spacing of each heat dissipation hole 120 to be 10 mm, and the aperture of the heat dissipation hole 120 to be 6 mm, and every two adjacent heat dissipation holes 120 are staggered, so that the multiple heat dissipation holes 120 account for 30% of the honeycomb aluminum skeleton for backup.

[0119] S3, multiple dipping-heat curing operation:

[0120] S31, after the holes are fully opened, the aluminum honeycomb frame is placed on the lower frame of the mold frame, and then the upper frame of the mold frame is tightly covered on the top of the honeycomb metal frame 100, so that all the honeycomb holes 110 of the honeycomb metal frame 100 are exposed, and the honeycomb component A to be dipped is obtained;

[0121] S32, completely immersing the honeycomb component A to be immersed in an immersion tank containing a 30° C. polymer thermal expansion fireproof heat dissipation material for 1 minute to obtain a honeycomb fireproof heat dissipation component A;

[0122] S33, taking out and draining the honeycomb fireproof heat dissipation component A in step S32;

[0123] S34, transferring the drained honeycomb fireproof heat dissipation component A to a drying room at 120° C. for drying for 15 minutes, so that the fireproof heat-conducting expansion support coating 200 can be fixedly formed on the inner wall of the honeycomb hole 110, and obtaining the honeycomb fireproof heat dissipation component B;

[0124] S35, after naturally cooling the honeycomb fireproof heat dissipation component B after step S34 to room temperature, immediately proceed to step S32, and repeat steps S32 to S34 twice in sequence to form a fireproof heat-conductive expansion support coating 200 with a thickness of 300 μm on the inner wall of the honeycomb hole 110;

[0125] S36, demolding the honeycomb fireproof heat dissipation component C, and cutting and correcting the edges to obtain a glue-free honeycomb fireproof heat dissipation structure 10 of standard application size, so as to facilitate the side edge sealing of the glue-free honeycomb fireproof heat dissipation structure 10.

[0126] Example 2

[0127] The difference from Example 1 is that "repeat steps S32 to S34 twice" in step S35 is directly replaced with "repeat steps S32 to S34 three times", and the rest remains unchanged.

[0128] Example 3

[0129] The difference from Example 1 is that "repeat steps S32 to S34 twice" in step S35 is directly replaced with "repeat steps S32 to S34 four times", and the rest remains unchanged.

[0130] Example 4

[0131] The difference from Example 1 is that "repeat steps S32 to S34 twice" in step S35 is directly replaced with "repeat steps S32 to S34 five times", and the rest remains unchanged.

[0132] Comparative Example 1

[0133] The difference from Example 1 is that "repeat steps S32 to S34 twice" in step S35 is directly replaced with "repeat steps S32 to S34 once", and the rest remains unchanged.

[0134] Comparative Example 2

[0135] The difference from Example 1 is that "repeat steps S32 to S34 twice" in step S35 is directly replaced with "repeat steps S32 to S34 six times", and the rest remains unchanged.

[0136] Comparative Example 3

[0137] The difference from Example 1 is that the "complete immersion" in step S32 is directly replaced by "immersion 2 / 3", and the rest remains unchanged.

[0138] Comparative Example 4

[0139] The difference from Example 1 is that the "30°C" in step S32 is directly replaced by "55°C", and the rest remains unchanged.

[0140] Comparative Example 5

[0141] The difference from Example 1 is that "1 min" in step S32 is directly replaced by "0.1 min", and the rest remains unchanged.

[0142] Comparative Example 6

[0143] The difference from Example 1 is that steps S31 and S36 are directly omitted, and the completely opened honeycomb aluminum frame is directly put into steps S32 to S35, and the rest remain unchanged.

[0144] Comparative Example 7

[0145] The difference from Example 1 is that step S22 is directly omitted, and the rest remains unchanged.

[0146] Comparative Example 8

[0147] The difference from Example 1 is that the honeycomb aluminum frame is replaced with a folded soft honeycomb aluminum frame (1 series pure aluminum 1050), and the rest remains unchanged.

[0148] Comparative Example 9

[0149] The difference from Example 1 is that the "multiple honeycomb holes account for 98% of the honeycomb aluminum skeleton" in step S21 is directly replaced with "multiple honeycomb holes account for 88% of the honeycomb aluminum skeleton", and the rest remains unchanged.

[0150] Comparative Example 10

[0151] The difference from Example 1 is that "the proportion of the plurality of heat dissipation holes in the honeycomb aluminum skeleton is 30%" in step S22 is directly replaced by "the proportion of the plurality of heat dissipation holes in the honeycomb aluminum skeleton is 60%", and the rest remains unchanged.

[0152] The glue-free honeycomb fireproof heat dissipation structures prepared in the above Examples 1 to 4 and Comparative Examples 1 to 10 were tested for bending strength, appearance of the fireproof heat-conducting expansion support coating, thickness of the fireproof heat-conducting expansion support coating, fireproof expansion performance of the fireproof heat-conducting expansion support coating, and expansion multiple of the fireproof heat-conducting expansion support coating to obtain the experimental data in Table 2 below:

[0153] Bending strength test: Use a mechanical testing machine to test and calculate the bending strength of the specimen in accordance with the provisions of Chapter 10 of GB / T7019-2014.

[0154] Test of fireproof expansion performance of fireproof thermal expansion support coating: Use a micrometer to measure the thickness of the sample before expansion, then place the steel container with the sample in a resistance furnace at a temperature of 540±10℃, keep the temperature constant for 30 minutes, and then take it out. After sufficient cooling, measure the height of the sample after expansion. The ratio of the height of the sample after expansion to the height before expansion is the expansion multiple of the material.

[0155] Thickness detection of fire-resistant thermal conductive expansion support coating: using paint film thickness tester.

[0156] Appearance of the fireproof thermal conductive expansion support coating: directly cut the honeycomb holes of the glue-free honeycomb fireproof heat dissipation structure longitudinally, and then use a magnifying glass to observe the appearance of the fireproof thermal conductive expansion support coating in the glue-free honeycomb fireproof heat dissipation structure.

[0157] Table 2 Experimental data

[0158]

[0159]

[0160]

[0161]

[0162] From Examples 1 to 4 and Comparative Examples 1 to 5 in Table 2 above, it can be seen that when the thickness of the formed fireproof heat-conducting expansion support coating does not exceed 400 μm, it can not only effectively block the honeycomb holes, but also improve the bending strength of the glue-free honeycomb fireproof and heat dissipation structure; especially when the fireproof heat-conducting expansion support coating is 300 μm to 400 μm, combined with the use of polymer thermal expansion fireproof and heat dissipation materials with an expansion multiple of 15 to 21 times, 300 μm to 400 μm can completely block the honeycomb holes, and flames and high-temperature smoke cannot penetrate. For details, please refer to the comprehensive indicators of Examples 1 to 4. Among them, the comprehensive indicators of Examples 2 and 3 are better.

[0163] From the comparison between Example 1 and Comparative Example 6 in Table 2 above, it can be seen that since Comparative Example 6 does not use a mold frame, it is impossible to ensure that the folded soft and hard honeycomb aluminum skeleton remains in a fully expanded state during multiple impregnation processes, thereby affecting the thickness and appearance of the fire-resistant, thermally conductive, expansion-supporting coating, making the comprehensive indicators of Comparative Example 6 worse than those of Example 1.

[0164] From the comparison between Example 1 and Comparative Example 7 in Table 2 above, it can be seen that since Comparative Example 7 did not perform batch hole opening operations, the heat dissipation performance of Comparative Example 7 was poor, resulting in obvious bulging around the honeycomb aluminum skeleton, making the comprehensive indicators of Comparative Example 7 significantly worse than those of Example 1.

[0165] From the comparison between Example 1 and Comparative Example 8 in Table 2 above, it can be seen that since Comparative Example 8 adopts a folded soft honeycomb aluminum skeleton, it is not only not conducive to forming a dense, uniform, thin, complete and round fire-proof thermal conductive expansion support coating, but also affects the structural strength of the glue-free honeycomb fire-proof heat dissipation structure, resulting in the comprehensive indicators of Comparative Example 8 being significantly worse than those of Example 1.

[0166] From the comparison between Example 1 and Comparative Examples 9-10 in Table 2 above, it can be seen that when the multiple honeycomb holes in Example 1 account for 90%-98% of the honeycomb aluminum skeleton, and the multiple heat dissipation holes account for 20%-50% of the honeycomb aluminum skeleton, it helps to form a glue-free honeycomb fireproof heat dissipation structure with good heat dissipation, dense and uniform, thin, complete and round, and good fire-proof expansion performance, so that the comprehensive indicators of Example 1 are better than those of Comparative Examples 9-10.

[0167] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A method for preparing a glue-free honeycomb fireproof heat dissipation structure, characterized in that: The steps include: Obtain a honeycomb metal skeleton; The honeycomb metal skeleton is subjected to multiple dipping-heat curing operations using a polymer thermal expansion fireproof heat dissipation material to form a fireproof heat-conducting expansion support coating on the inner wall of the honeycomb holes of the honeycomb metal skeleton to obtain the glue-free honeycomb fireproof heat dissipation structure.

2. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 1, characterized in that: The step of using a polymer thermal expansion fireproof and heat dissipation material to perform multiple impregnation-heat curing operations on the honeycomb metal skeleton includes the following specific steps: Placing the honeycomb metal frame in a mold frame to obtain a honeycomb component A to be dipped; The honeycomb component A to be impregnated is impregnated with a polymer thermal expansion fireproof heat dissipation material to form the fireproof heat conductive expansion support coating on the inner wall of the honeycomb hole of the honeycomb metal skeleton to obtain a honeycomb fireproof heat dissipation component A; Performing a thermal curing operation on the honeycomb fireproof heat dissipation component A to obtain a honeycomb fireproof heat dissipation component B; Repeat the above-mentioned impregnation operation and the high-temperature curing operation on the honeycomb fireproof heat dissipation component B in sequence to complete the impregnation-heat curing operation multiple times to obtain a honeycomb fireproof heat dissipation component C; The honeycomb fireproof heat dissipation component C is demolded to obtain the glue-free honeycomb fireproof heat dissipation structure.

3. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 2, characterized in that: When the above-mentioned dipping operation and the high-temperature curing operation are sequentially repeated on the honeycomb fireproof heat dissipation component B, the number of repetitions is 2 to 5 times; and / or, After the step of impregnating the honeycomb component A to be impregnated with a polymer thermal expansion fireproof heat dissipation material and before the step of heat curing the honeycomb fireproof heat dissipation component A, the method for preparing the glue-free honeycomb fireproof heat dissipation structure further comprises the following steps: The honeycomb fireproof heat dissipation component A is drained.

4. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 2, characterized in that: The conditions of the immersion operation are: the honeycomb component A to be immersed is completely immersed in the polymer thermal expansion fireproof heat dissipation material; the immersion operation time is 0.5min to 3min; the immersion temperature is 30°C to 50°C.

5. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 1, characterized in that: The conditions of the heat curing operation are: temperature of 100° C. to 200° C.; time of 5 min to 20 min.

6. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 1, characterized in that: 2kg to 10kg of the polymer thermal expansion fireproof and heat dissipation material is used per square meter of the honeycomb holes; and / or, The thickness of the fireproof heat-conducting expansion support coating does not exceed 400 μm.

7. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 1, characterized in that: The polymer thermal expansion fireproof heat dissipation material includes the following parts by mass: Wherein, the expansion multiple of the polymer thermal expansion fireproof and heat dissipation material is 15 to 21 times.

8. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 7, characterized in that: The heat dissipation filler includes at least one of iron powder, boron nitride, aluminum nitride, silicon carbide, silicon nitride, silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, zirconium oxide and graphite; and / or, The thermosetting resin includes at least one of epoxy resin, phenolic resin, polyurethane resin and unsaturated polyester resin; and / or, The inorganic flame retardant includes at least one of expandable graphite, aluminum hydroxide, magnesium hydroxide, antimony trioxide, ammonium polyphosphate, 1,3,5-triazine-2,4,6-triamine, sorbitol, starch and pentaerythritol; and / or, The organic flame retardant includes at least one of tert-butylated aryl phosphate, hexaphenoxy cyclotriphosphazene, resorcinol bis(diphenyl phosphate) and polysiloxane.

9. The method for preparing the glue-free honeycomb fireproof heat dissipation structure according to claim 1, characterized in that: The steps of obtaining the honeycomb metal framework include the following specific steps: The honeycomb metal frame in the folded state is subjected to a hole-opening operation to form a plurality of heat dissipation holes in the longitudinal direction of the honeycomb metal frame.

10. A glue-free honeycomb fireproof heat dissipation structure, characterized in that: The structure is prepared by the method for preparing the glue-free honeycomb fireproof heat dissipation structure described in any one of claims 1 to 9.

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