Heating structure and preparation method thereof, battery pack and electric equipment

Abstract

The invention discloses a heating structure and a preparation method thereof, a battery pack and electric equipment, the heating structure comprises a heat-conducting glue piece, the heat-conducting glue piece comprises heat-conducting glue, ferrite nanoparticles and an induction coil, the ferrite nanoparticles and the induction coil are arranged in the heat-conducting glue, and the induction coil is communicated with an external power supply. According to the heating structure provided by the invention, the ferrite nanoparticles and the induction coil are arranged in the heat-conducting glue to form the heat-conducting glue piece, and the ferrite nanoparticles are uniformly dispersed in the heat-conducting glue, so that the temperature change consistency of the heat-conducting glue is improved, and the temperature change consistency of a part which exchanges heat with the heating structure is improved. Meanwhile, the heating structure is simple in structure and small in size, the applicability of the heating structure is improved, the distance between the heating structure and the surrounding parts can be reduced, and therefore the heat exchange efficiency of the heating structure and the surrounding parts is improved, and the heat loss of the heating structure is reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a heating structure and a preparation method thereof, a battery pack and electrical equipment. Background Art

[0002] The suitable operating temperature of the battery of an electric vehicle is 20℃~45℃. When the battery is in a low temperature environment, the internal resistance of the battery increases, the charging efficiency decreases, and forced high current charging can easily cause lithium deposition in the battery, causing permanent capacity loss, internal short circuit and fire hazards. Therefore, the battery needs to be heated in a low temperature environment to keep the battery at a suitable operating temperature, which can easily reduce the service life of the battery. In the related art, heating structures such as water heating or electric heating film heating are often used to heat the battery. However, the above-mentioned heating structure is large in size, and it is difficult to control the consistency of the heating temperature, and the cost is high. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first object of the present invention is to provide a heating structure to improve the consistency of temperature changes of components that exchange heat with the heating structure. At the same time, the heating structure has a relatively simple structure and a small volume, which increases the applicability of the heating structure.

[0004] The second object of the present invention is to provide a method for preparing a heating structure.

[0005] The third objective of the present invention is to provide a battery pack.

[0006] A fourth object of the present invention is to provide an electrical device.

[0007] According to the first aspect of the present invention, the heating structure of the embodiment includes: a thermally conductive adhesive member, the thermally conductive adhesive member includes thermally conductive adhesive, ferrite nanoparticles and an induction coil, the ferrite nanoparticles and the induction coil are arranged in the thermally conductive adhesive, and the induction coil is used to connect to an external power supply.

[0008] According to the heating structure of the embodiment of the present invention, by placing ferrite nanoparticles and an induction coil in a thermally conductive adhesive to form a thermally conductive adhesive member, the ferrite nanoparticles are evenly dispersed in the thermally conductive adhesive, which is conducive to improving the consistency of the temperature change of the thermally conductive adhesive, thereby improving the consistency of the temperature change of the components that exchange heat with the heating structure. At the same time, the structure of the heating structure is relatively simple and the volume is small, which increases the applicability of the heating structure and helps to reduce the distance between the heating structure and the surrounding components, thereby improving the heat exchange efficiency between the heating structure and the surrounding components and reducing the heat loss of the heating structure.

[0009] According to some embodiments of the present invention, the amount of the ferrite nanoparticles added to the thermally conductive adhesive is 5% to 30% by mass.

[0010] According to some embodiments of the present invention, the thermally conductive adhesive comprises epoxy resin thermosetting adhesive and / or polyurethane thermosetting adhesive, the heating temperature of the thermally conductive adhesive is T, wherein T satisfies: T≤45°C, and / or the ferrite nanoparticles are Mn x Zn x Fe2O4.

[0011] According to some embodiments of the present invention, the thermally conductive adhesive further includes a tackifier and / or a filler.

[0012] According to some embodiments of the present invention, the amount of the tackifier added is 30% to 40% by mass, and / or the amount of the filler added is 0% to 10% by mass.

[0013] According to some embodiments of the present invention, the filler comprises an alumina filler.

[0014] According to some embodiments of the present invention, the cross section of the thermally conductive adhesive member includes a first sub-thermal conductive adhesive area and at least one second sub-thermal conductive adhesive area, and at least one second sub-thermal conductive adhesive area is arranged adjacent to at least part of the first sub-thermal conductive adhesive area, wherein the amount of ferrite nanoparticles added in the first sub-thermal conductive adhesive area and / or the number of induction coils is not greater than the amount of ferrite nanoparticles added in the second sub-thermal conductive adhesive area and / or the number of induction coils. According to some embodiments of the present invention, the heating structure further includes an insulating thermally conductive adhesive layer, the insulating thermally conductive adhesive layer covers at least part of the surface of the thermally conductive adhesive member, and the insulating thermally conductive adhesive layer is arranged adjacent to the electrical component.

[0015] The method for preparing a heating structure according to the second embodiment of the present invention comprises the following steps: dispersing ferrite nanoparticles into a thermally conductive adhesive to obtain a flowable pre-product, setting an induction coil in the pre-product, and allowing it to stand.

[0016] According to some embodiments of the present invention, the preparation steps of the pre-product are as follows: after heating and mixing the thermal conductive adhesive and the tackifier, the ferrite nanoparticles and the filler are added, mixed, and vacuum cooled to obtain the pre-product.

[0017] A battery pack according to an embodiment of a third aspect of the present invention comprises: a tray and / or a cold plate; a battery cell, wherein the battery cell is arranged in the tray and / or the cold plate; and a heating structure, wherein the heating structure is the heating structure according to the embodiment of the first aspect of the present invention or the heating structure prepared by the preparation method according to the embodiment of the second aspect of the present invention, and the heating structure is arranged between the battery cell and the tray and / or the cold plate.

[0018] According to some embodiments of the present invention, the battery pack further comprises an insulating layer, wherein the insulating layer is disposed between the heating structure and the tray and / or the cold plate.

[0019] According to some embodiments of the present invention, the insulating layer is a thermally conductive adhesive insulating layer or a paint layer.

[0020] An electric device according to an embodiment of a fourth aspect of the present invention comprises a battery pack according to an embodiment of the third aspect of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of a heat-conducting adhesive member of a heating structure according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a heat-conducting adhesive member of a heating structure according to another embodiment of the present invention;

[0025] Figure 3 is a partial schematic diagram of a battery pack according to an embodiment of the present invention;

[0026] Figure 4 is a partial schematic diagram of a battery pack according to an embodiment of the present invention from another angle;

[0027] Figure 5 is a partial enlarged schematic diagram of a battery pack according to an embodiment of the present invention;

[0028] Figure 6 is a partial enlarged schematic diagram of a battery pack according to another embodiment of the present invention;

[0029] Figure 7 is a schematic diagram of temperature and time of the thermal conductive adhesive of the heating structure according to an embodiment of the present invention;

[0030] Figure 8 Schematic diagram of temperature and time under different ferrite nanoparticles of the thermal conductive adhesive of the heating structure according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100: heating structure;

[0033] 1: thermal conductive adhesive; 11: thermal conductive adhesive; 12: ferrite nanoparticles; 13: induction coil; 14: first sub-thermal conductive adhesive area; 15: second sub-thermal conductive adhesive area; 2: insulating thermal conductive adhesive layer;

[0034] 200: battery pack;

[0035] 201: tray (cold plate); 202: battery cell; 203: insulation layer;

[0036] 300: External power supply. DETAILED DESCRIPTION

[0037] Reference below Figure 1-Figure 8 A heating structure 100 according to an embodiment of a first aspect of the present invention is described.

[0038] like Figure 1-Figure 8 As shown, the heating structure 100 according to the embodiment of the present invention includes a thermally conductive adhesive 1. By passing an alternating current through the induction coil 13 to generate an alternating electric field, the ferrite nanoparticles 12 are heated, and then the thermally conductive adhesive 1 is heated as a whole, which is conducive to heat exchange with surrounding components (such as electrical components), and the heating effect of the heating structure 100 is exerted. Therefore, the structure of the heating structure 100 is relatively simple, and the ferrite nanoparticles 12 are well dispersed in the thermally conductive adhesive 11, so that the temperature consistency of the heating structure 100 is higher, and then the temperature change consistency of the surrounding components that exchange heat with the heating structure 100 is improved.

[0039] Specifically, the thermal conductive adhesive member 1 includes a thermal conductive adhesive 11 , ferrite nanoparticles 12 and an induction coil 13 . The ferrite nanoparticles 12 and the induction coil 13 are disposed in the thermal conductive adhesive 11 , and the induction coil 13 is used to communicate with the external power source 300 .

[0040] For example, in Figure 1-Figure 4 In the example, the ferrite nanoparticles 12 are well dispersed in the thermally conductive adhesive 11, and the induction coil 13 is also arranged in the thermally conductive adhesive 11. Among them, the ferrite nanoparticles 12 are easy to generate heat under the action of the alternating magnetic field. Therefore, the heating structure 100 uses the heat generated by the ferrite nanoparticles 12 to increase the temperature of the thermally conductive adhesive 1, thereby achieving the purpose of saving energy. At the same time, the ferrite nanoparticles 12 are evenly dispersed in the thermally conductive adhesive 11, which is conducive to improving the consistency of the temperature change of the thermally conductive adhesive 11, thereby improving the consistency of the temperature change of the components that exchange heat with the thermally conductive adhesive 1.

[0041] For example, the external power source 300 may be a vehicle-mounted oscillator. However, the invention is not limited thereto. The vehicle-mounted oscillator generates high-frequency alternating current, and generates an alternating magnetic field through the induction coil 13. The alternating magnetic field acts on the ferrite nanoparticles 12 in the thermally conductive adhesive 1, generating eddy currents in the ferrite nanoparticles 12, causing the ferrite nanoparticles 12 to generate heat, which is then transferred to surrounding components through the thermally conductive adhesive 11, thereby heating the surrounding components.

[0042] In addition, the heating structure 100 has a relatively simple structure and a small volume, which increases the applicability of the heating structure 100 and helps to reduce the distance between the heating structure 100 and surrounding components, thereby improving the heat exchange efficiency between the heating structure 100 and surrounding components and reducing the heat loss of the heating structure 100.

[0043] According to the heating structure 100 of the embodiment of the present invention, by arranging the ferrite nanoparticles 12 and the induction coil 13 in the thermally conductive adhesive 11 to form the thermally conductive adhesive member 1, the ferrite nanoparticles 12 are evenly dispersed in the thermally conductive adhesive 11, which is conducive to improving the consistency of the temperature change of the thermally conductive adhesive 11, thereby improving the consistency of the temperature change of the components that exchange heat with the heating structure 100. At the same time, the structure of the heating structure 100 is relatively simple and the volume is small, which increases the applicability of the heating structure 100, and is conducive to reducing the distance between the heating structure 100 and the surrounding components, thereby improving the heat exchange efficiency between the heating structure 100 and the surrounding components and reducing the heat loss of the heating structure 100.

[0044] According to some embodiments of the present invention, the amount of ferrite nanoparticles 12 added to the thermally conductive adhesive 1 is 5% to 30% by mass. Therefore, the amount of ferrite nanoparticles 12 added to the thermally conductive adhesive 1 is relatively reasonable, which is beneficial to the temperature rise stability and reliability of the thermally conductive adhesive 1, meets the heat exchange requirements of the surrounding components for the heating structure 100, and avoids the high temperature of the thermally conductive adhesive 1 causing the high temperature of the thermally conductive adhesive 11 to melt, thereby improving the structural reliability and stability of the thermally conductive adhesive 1, improving the temperature reliability of the heating structure 100, and improving the service life of the thermally conductive adhesive 1.

[0045] Furthermore, the thermally conductive adhesive 11 includes epoxy resin thermosetting adhesive and / or polyurethane thermosetting adhesive. Among them, epoxy resin thermosetting adhesive has high strength, chemical stability, heat resistance and electrical insulation. The use of epoxy resin thermosetting adhesive as the thermally conductive adhesive 11 is conducive to reducing the melting deformation of the thermally conductive adhesive 11 during the heating process, improving the structural stability of the heating structure 100, and improving the usability of the heating structure 100. At the same time, the use of epoxy resin thermosetting adhesive as the thermally conductive adhesive 11 avoids the influence of the heating structure 100 on electrical components (such as the battery pack 200), which is conducive to the use of the heating structure 100 in electrical components. Polyurethane thermosetting adhesive is a high-performance adhesive with excellent bonding strength, and good flexibility, weather resistance and waterproofness. Therefore, the use of polyurethane thermosetting adhesive as the thermally conductive adhesive 11 is conducive to improving the stability of the thermally conductive adhesive 11 covering the induction coil 13, thereby improving the structural stability of the thermally conductive adhesive part 1.

[0046] The heating temperature of the thermal conductive adhesive 11 is T, where T satisfies: T≤45°C. The heating temperature of the thermal conductive adhesive 11 T≤45°C is reasonable, which is conducive to reducing the risk of melting and deformation of the thermal conductive adhesive 11 at a high temperature. Figure 7 The curve of the change of the thermal conductive adhesive 11 with temperature and time shows that the thermal conductive adhesive 11 softens when the temperature is 45℃~80℃; when the temperature is greater than 80℃, the thermal conductive adhesive 11 is easy to decompose; when the temperature reaches 160℃, the magnetic heating capacity of the ferrite nanoparticles 12 reaches the maximum. Therefore, controlling the temperature of the thermal conductive adhesive 11 to be less than or equal to 45℃ is conducive to delaying the aging of the thermal conductive adhesive 11 and extending the service life of the thermal conductive adhesive 11 and the thermal conductive adhesive component 1 using the thermal conductive adhesive 11.

[0047] Among them, pulse heating (a technology that heats materials through short and powerful current pulses) can be used to allow enough time for heat to be exchanged to surrounding components, so as not to overheat the thermal conductive adhesive 11. The actual pulse time used can be determined through calibration tests, that is, the pulse time is adjusted in a gradient to explore the most suitable pulse time range.

[0048] In addition, refer to Figure 8 , controlling the amount of ferrite nanoparticles 12 added to the thermally conductive adhesive 1 will also affect the temperature rise rate of the thermally conductive adhesive 11. When the amount of ferrite nanoparticles 12 added is 10%, 20% and 30%, the temperature rise rate increases successively within the same pulse time; to achieve the same temperature, the pulse time required decreases successively when the amount of ferrite nanoparticles 12 added is 10%, 20% and 30%. Therefore, the heating temperature of the thermally conductive adhesive 11 can be reduced by reducing the amount of ferrite nanoparticles 12 added to the thermally conductive adhesive 1.

[0049] The ferrite nanoparticles 12 are Mn x Zn xFe2O4. When Mn x Zn x When x in Fe2O4 is of different values, it corresponds to different ferrite nanoparticles 12. The above ferrite nanoparticles 12 all have good magnetic thermal conductivity, so that the thermal conductive adhesive 1 as a whole is heated by the alternating current of the external power supply 300, which is conducive to heat exchange with surrounding components to increase the temperature of the surrounding components until the temperature of the surrounding components reaches a suitable working temperature, thereby improving the working efficiency of the surrounding components.

[0050] According to some embodiments of the present invention, the thermally conductive adhesive 11 further includes a tackifier and / or a filler. Among them, the tackifier can be used to improve the adhesion, fluidity and durability (i.e., weather resistance, heat resistance and chemical resistance) of the thermally conductive adhesive 11, thereby facilitating the coating reliability of the thermally conductive adhesive 11 on the induction coil 13, and at the same time extending the service life of the thermally conductive adhesive 11. Fillers refer to solid particles dispersed in the thermally conductive adhesive 11, which can significantly improve the physical and chemical properties of the thermally conductive adhesive 11. For example, the filler can improve the mechanical strength of the thermally conductive adhesive 11, change the rheological properties of the thermally conductive adhesive 11, increase the barrier properties of the thermally conductive adhesive 11, and reduce the cost of the thermally conductive adhesive 11.

[0051] Furthermore, the amount of the thickener added is 30% to 40% by mass percentage. When the amount of the thickener added is less than 30%, the amount of the thickener added is less, so the improvement effect of the thickener on the thermal conductive adhesive 11 is poor; when the amount of the thickener added is greater than 40%, the amount of the thickener added is more, which is easy to increase the volume of the thermal conductive adhesive 11, resulting in a higher viscosity of the thermal conductive adhesive 11. Therefore, by setting the amount of the thickener added to 30% to 40%, the amount of the thickener added is more reasonable, which is conducive to meeting the thickening requirements of the thermal conductive adhesive 11, improving the coating reliability of the thermal conductive adhesive 11 on the induction coil 13, and extending the service life of the thermal conductive adhesive 1.

[0052] The amount of filler added is 0% to 10%. Therefore, the amount of filler added is relatively reasonable, which is conducive to adding filler according to the heat conduction needs of the thermal conductive adhesive 11, giving full play to the role of the filler, and avoiding the viscosity of the thermal conductive adhesive 11 decreasing due to too much filler, which is conducive to improving the performance of the thermal conductive adhesive 11.

[0053] Furthermore, the filler includes an aluminum oxide filler. The aluminum oxide filler is beneficial to improving the mechanical strength of the thermal conductive adhesive 11, improving the wear resistance of the thermal conductive adhesive 11, increasing the thermal conductivity of the thermal conductive adhesive 11, improving the chemical resistance of the thermal conductive adhesive 11, and improving the thermal stability of the thermal conductive adhesive 11, and also has certain flame retardant properties, thereby reducing the combustion risk of the thermal conductive adhesive 11 and extending the service life of the thermal conductive adhesive 11.

[0054] According to some embodiments of the present invention, referring to Figure 1 and Figure 2, the cross section of the thermally conductive adhesive member 1 includes a first sub-thermal conductive adhesive area 14 and at least one second sub-thermal conductive adhesive area 15, and the at least one second sub-thermal conductive adhesive area 15 is arranged adjacent to at least part of the first sub-thermal conductive adhesive area 14. Among them, the amount of ferrite nanoparticles 12 added in the first sub-thermal conductive adhesive area 14 and / or the number of induction coils 13 is not greater than the amount of ferrite nanoparticles 12 added in the second sub-thermal conductive adhesive area 15 and / or the number of induction coils 13. That is, referring to Figure 1 and Figure 2 The amount of ferrite nanoparticles 12 added and / or the number of induction coils 13 in the first thermal conductive adhesive sub-area 14 is less than or equal to the amount of ferrite nanoparticles 12 added and / or the number of induction coils 13 in the second thermal conductive adhesive sub-area 15 .

[0055] Reference Figure 1 The addition amount of the ferrite nanoparticles 12 and the number of the induction coils 13 in the first sub-thermal conductive adhesive area 14 and the second sub-thermal conductive adhesive area 15 are the same, and the quality uniformity of the thermal conductive adhesive member 1 is good.

[0056] Reference Figure 2 The cross section of the thermally conductive adhesive member 1 includes a first sub-thermal conductive adhesive area 14 and two second sub-thermal conductive adhesive areas 14. The amount of ferrite nanoparticles 12 added and / or the number of induction coils 13 in the two second sub-thermal conductive adhesive areas 15 are both relatively large, so that the second sub-thermal conductive adhesive area 15 can be away from the side of the first sub-thermal conductive adhesive area 14 and close to the surrounding components that require heat exchange, thereby giving full play to the heating effect of the heating structure 100 on the surrounding components. At the same time, the amount of ferrite nanoparticles 12 added and / or the number of induction coils 13 in the first sub-thermal adhesive area 14 away from the surrounding components are reduced, so that the thermally conductive adhesive component 1 has different heating powers in at least different areas of the cross section, which is beneficial to achieving the effect of temperature balance of the thermally conductive adhesive component 1 (the second sub-thermal conductive adhesive area 15 has more heat exchange with the surrounding components, and the first sub-thermal conductive adhesive area 14 has less heat exchange with the surrounding components, so it is easy to make the temperature of the entire thermally conductive adhesive component 1 roughly the same after cooling), which is beneficial to avoid aging or deterioration caused by local overheating of the thermally conductive adhesive component 1 due to slow heat dissipation of the first sub-thermal conductive adhesive area 14.

[0057] In addition, refer to Figure 5 and Figure 6 The heating structure 100 further includes an insulating thermally conductive adhesive layer 2, which covers at least a portion of the surface of the thermally conductive adhesive member 1, and the insulating thermally conductive adhesive layer 2 is disposed adjacent to the electrical component.

[0058] Therefore, when the heating structure 100 is used for heating electrical components, the side of the thermally conductive adhesive 1 coated with the insulating thermally conductive adhesive layer 2 can be adjacent to the electrical components, thereby avoiding the influence of the heating structure 100 on the electrical components and improving the stability of the electrical components.

[0059] For example, the thermally conductive adhesive member 1 is coated with an insulating thermally conductive adhesive layer 2 on at least one side in the thickness direction, or the insulating layer 203 is coated with an insulating thermally conductive adhesive layer 2 on the periphery of the thermally conductive adhesive member 1. The thermally conductive adhesive member 1 may be a layered structure or a columnar structure, which is not specifically limited here.

[0060] Furthermore, when the heating structure 100 is used in the battery pack 200, the insulating thermally conductive adhesive layer 2 faces the battery core 202 in the battery pack 200. Thus, the battery core 202 and the heating structure 100 can be stably connected together through the insulating thermally conductive adhesive layer 2, thereby increasing the integrity of the battery pack 200 and preventing the ferrite nanoparticles 12 and the induction coil 13 of the heating structure 100 from affecting the battery core 202 during operation, thereby ensuring the operational stability of the battery pack 200.

[0061] The method for preparing the heating structure 100 according to the second aspect of the present invention comprises the following steps: dispersing ferrite nanoparticles 12 into a thermally conductive adhesive 11 to obtain a flowable pre-product, setting an induction coil 13 in the pre-product, and allowing it to stand.

[0062] According to the method for preparing the heating structure 100 of the embodiment of the present invention, the uniformity of the dispersion of the ferrite nanoparticles 12 in the thermally conductive adhesive 11 is firstly ensured, thereby improving the temperature change consistency of the thermally conductive adhesive 1. Then, by setting the induction coil 13 in the thermally conductive adhesive 11 in which the ferrite nanoparticles 12 are dispersed, the heating balance of the thermally conductive adhesive 1 can be improved.

[0063] Furthermore, the preparation steps of the pre-product are as follows: after the thermal conductive adhesive 11 and the tackifier are heated and mixed, the ferrite nanoparticles 12 and the filler are added, mixed, and vacuum cooled to obtain. In the heated state, the fluidity of the thermal conductive adhesive 11 and the tackifier is increased, which is beneficial to the uniformity of the thermal conductive adhesive 11, the tackifier, the ferrite nanoparticles 12 and the filler, and the uniformity of the prepolymer is improved. Finally, vacuum cooling is beneficial to avoid the formation of bubbles in the prepolymer, improve the quality of the prepolymer, and then improve the quality of the thermal conductive adhesive part 1.

[0064] The battery pack 200 according to the third aspect of the present invention comprises: a tray 201 and / or a cold plate 201; a battery cell 202, wherein the battery cell 202 is arranged in the tray 201 and / or the cold plate 201; and a heating structure 100, wherein the heating structure 100 is the heating structure 100 according to the first aspect of the present invention or the heating structure 100 prepared by the preparation method of the second aspect of the present invention, and the heating structure 100 is arranged between the battery cell 202 and the tray 201 and / or the cold plate 201.

[0065] According to the battery pack 200 of the embodiment of the present invention, a heating structure 100 is provided in the tray 201 and / or the cold plate 201, and the battery cell 202 is provided on the side of the heating structure 100 away from the tray 201 and / or the cold plate 201, thereby increasing the stability of the arrangement of the heating structure 100. Reducing the distance between the heating structure 100 and the battery cell 202 improves the efficiency of the temperature increase of the battery cell 202 in the battery pack 200, facilitates the use of the battery pack 200 at a suitable temperature, improves the charging and discharging efficiency of the battery pack 200, reduces the dangers of permanent capacity loss and internal short circuit fire of the battery pack 200, and prolongs the service life of the battery pack 200. At the same time, the heat transfer path between the heating structure 100 and the battery cell 202 is short and both are inside the battery pack 200, so the loss of heat dissipation to the surrounding environment is small, which is conducive to fully utilizing the heat energy of the heating structure 100.

[0066] Furthermore, the insulating layer 203 is a thermally conductive adhesive insulating layer 203 or a paint layer. Thus, the thermally conductive adhesive insulating layer 203 can be used to connect the heating structure 100 with the tray 201 and / or the cold plate 201, further increasing the setting stability of the heating structure 100 and the battery cell 202 connected to the heating structure 100, thereby further improving the integrity and use stability of the battery pack 200. The setting method of the paint layer on the tray 201 and / or the cold plate 201 is relatively simple, and the use of the paint layer is conducive to improving the assembly efficiency of the battery pack 200.

[0067] The electric device according to the fourth embodiment of the present invention includes the battery pack 200 according to the third embodiment of the present invention.

[0068] According to the electric equipment (not shown) of the embodiment of the present invention, by adopting the above-mentioned battery pack 200, it is beneficial to improve the energy supply stability and reliability of the electric equipment, improve the smoothness of the movement of the electric equipment, thereby helping to improve the user experience of the electric equipment and improve the market competitiveness of the electric equipment.

[0069] Other structures and operations of the electrical equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0070] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “center”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “inside”, “outside”, and “circumferential” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heating structure, characterized in that: include: A thermally conductive adhesive component, the thermally conductive adhesive component comprises thermally conductive adhesive, ferrite nanoparticles and an induction coil, the ferrite nanoparticles and the induction coil are arranged in the thermally conductive adhesive, and the induction coil is used to be connected to an external power supply.

2. The heating structure according to claim 1, characterized in that: Calculated by mass percentage, the added amount of the ferrite nanoparticles in the thermal conductive adhesive is 5% to 30%.

3. The heating structure according to claim 2, characterized in that: The thermally conductive adhesive comprises epoxy resin thermosetting adhesive and / or polyurethane thermosetting adhesive, and the heating temperature of the thermally conductive adhesive is T, wherein T satisfies: T≤45° C., and / or, The ferrite nanoparticles are Mn x Zn x Fe2O4.

4. The heating structure according to claim 2 or 3, characterized in that: The thermally conductive adhesive further comprises a tackifier and / or a filler.

5. The heating structure according to claim 4, characterized in that: In terms of mass percentage, the added amount of the tackifier is 30% to 40%, and / or the added amount of the filler is 0% to 10%.

6. The heating structure according to claim 5, characterized in that: The filler includes an alumina filler.

7. The heating structure according to claim 2, characterized in that: The cross section of the thermally conductive adhesive member includes a first thermally conductive adhesive sub-area and at least one second thermally conductive adhesive sub-area, wherein at least one second thermally conductive adhesive sub-area is disposed adjacent to at least a portion of the first thermally conductive adhesive sub-area. The amount of the ferrite nanoparticles added in the first thermal conductive adhesive sub-area and / or the number of the induction coils is not greater than the amount of the ferrite nanoparticles added in the second thermal conductive adhesive sub-area and / or the number of the induction coils.

8. The heating structure according to claim 1, characterized in that: It also includes an insulating thermally conductive adhesive layer, which covers at least a portion of the surface of the thermally conductive adhesive member, and the insulating thermally conductive adhesive layer is arranged adjacent to the electrical component.

9. A method for preparing a heating structure according to any one of claims 1 to 8, characterized in that: The steps include: The ferrite nanoparticles are dispersed in the thermal conductive adhesive to obtain a flowable pre-product, in which an induction coil is arranged and the pre-product is allowed to stand.

10. The method for preparing a heating structure according to claim 9, characterized in that: The preparation steps of the pre-product are as follows: after heating and mixing the thermal conductive adhesive and the tackifier, the ferrite nanoparticles and the filler are added, mixed, and vacuum-cooled to obtain the pre-product.

11. A battery pack, characterized in that: include: Pallets and / or cold plates; A battery cell, wherein the battery cell is arranged in the tray and / or the cold plate; A heating structure, wherein the heating structure is a heating structure according to any one of claims 1-8, or a heating structure prepared by the preparation method according to any one of claims 9-10, and the heating structure is arranged between the battery cell and the tray and / or the cold plate.

12. The battery pack according to claim 11, characterized in that: An insulating layer is also included, and the insulating layer is disposed between the heating structure and the tray and / or the cold plate.

13. The battery pack according to claim 12, characterized in that: The insulating layer is a thermal conductive adhesive insulating layer or a paint layer.

14. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 11-13.

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