Cooling structure, battery assembly, battery pack and electric equipment

Abstract

The invention relates to the technical field of batteries, in particular to a cooling structure, a battery assembly, a battery pack and electric equipment. The cooling structure comprises a plurality of first protection plates which are arranged in sequence, a containing space for containing a battery cell is formed between every two adjacent first protection plates, and a heat conduction connecting piece is arranged on one side of each first protection plate; the second protection plate is arranged on one side of the first protection plate, the second protection plate is provided with a heat conduction matching piece, and the heat conduction matching piece is arranged on the face, facing the first protection plate, of the second protection plate and is opposite to the heat conduction connecting piece; and the heat conduction connecting piece is connected with the heat conduction matching piece, so that the first protection plate is connected with the second protection plate. Heat absorption and heat exchange are carried out by utilizing the heat conduction connecting piece and the heat conduction matching piece, so that the first protection plate with a larger contact area with the battery cell can guide heat into the second protection plate, and the heat is released on the second protection plate, so that the heat generated by the battery cell can be effectively absorbed and released, and the heat dissipation efficiency of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cooling structure, a battery assembly, a battery pack, and an electrical device. Background Art

[0002] With the continuous development of electric vehicles, the requirements for their battery packs are also increasing. To ensure the safe use of battery packs, liquid cooling plates are often installed to dissipate heat from the battery cells. Specifically, heat insulation, heat absorption, heat dissipation, and heat-dissipating materials are placed between adjacent battery cells, combined with the heat dissipation structure of the liquid cooling plate to achieve heat dissipation from the battery pack.

[0003] However, the heat dissipation structure in the existing battery pack has poor heat dissipation effect due to its own structural limitations. Summary of the Invention

[0004] The present application provides a cooling structure, a battery assembly, a battery pack and an electrical device to improve the heat dissipation efficiency of a battery cell.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In one aspect, the present application provides a cooling structure for use in a battery assembly, wherein a plurality of battery cells in the battery assembly are sequentially arranged along a first direction, comprising:

[0007] A plurality of first protective plates are sequentially arranged along a first direction, with an accommodation space for accommodating the battery cells formed between adjacent first protective plates. A heat-conducting connector is provided on one side of the first protective plate along a second direction, and an angle is formed between the second direction and the first direction;

[0008] A second protective plate is provided on one side of the first protective plate along the second direction and extends along the first direction. The second protective plate is provided with a heat conducting fitting. The heat conducting fitting is provided on a side of the second protective plate facing the first protective plate and opposite to the heat conducting connector.

[0009] The heat-conducting connecting piece is connected to the heat-conducting matching piece to connect the first protective plate to the second protective plate.

[0010] In a possible implementation, the thermally conductive connecting piece includes a connecting portion, the thermally conductive fitting is provided with a connecting groove, and the connecting portion is accommodated in the connecting groove.

[0011] In one possible implementation, the thermally conductive connector also includes a clamping portion, which connects the clamping portion and the first protective plate. The thermally conductive fitting is also provided with a clamping groove connected to the connecting groove. The connecting groove is located on the side of the clamping groove facing the first protective plate, and the clamping portion is accommodated in the clamping groove.

[0012] In a possible implementation, the heat-conducting connector extends along the third direction, and is slidably disposed in the heat-conducting fitting along the third direction. The first direction, the second direction, and the third direction are arranged at angles to each other.

[0013] In a possible implementation, a cross-sectional shape of the thermally conductive connector perpendicular to the first direction includes at least one of a circle and a polygon.

[0014] In a possible implementation, the first protective plate includes a first shell and a first material filled in the first shell.

[0015] In a possible implementation, the first shell includes at least one of an aluminum-plastic film, a polymer film, and a metal film.

[0016] In a possible implementation, the thickness of the first shell is L1, and L1 satisfies: 0.02 mm ≤ L1 ≤ 0.25 mm.

[0017] In a possible implementation, the first material includes a phase change material, a gel, or a composite of a phase change material and a heat insulation material.

[0018] In one possible implementation, the phase change material includes at least one of water, fluoride liquid, silicone oil, silica sol, aluminum sol, zirconium sol, silica aluminum sol, silica zirconium sol, aluminum zirconium sol, silica aluminum zirconium sol, paraffin, calcium chloride hexahydrate solution, sodium sulfate decahydrate solution, barium hydroxide octahydrate solution, and magnesium chloride hexahydrate solution, and the thermal insulation material includes at least one of aerogel, glass fiber, zirconium oxide fiber, mullite fiber, silica fiber, alumina fiber, rock wool, aluminum silicate fiber, and pre-oxidized silk fiber.

[0019] In a possible implementation, the thickness of the first material is L2, and L2 satisfies: 0.5 mm ≤ L2 ≤ 6 mm.

[0020] In a possible implementation, the first protective plate further includes a heat conducting rod, which is disposed in the first shell and extends along the second direction.

[0021] In a possible implementation, the heat conducting rod is connected to the heat conducting connector.

[0022] In a possible implementation, the heat conducting rod and the heat conducting connector are integrally formed.

[0023] In a possible implementation, along the first direction, the number of heat conducting rods on the first protective plate located in the middle of the multiple battery cells is greater than the number of heat conducting rods on the first protective plate located on both sides of the multiple battery cells.

[0024] In a possible implementation, the heat conducting rod includes a metal material, an inorganic non-metallic material, or a composite material.

[0025] In a possible implementation, the second protective plate includes a second shell and a second material filled in the second shell, and the thermally conductive fitting is provided on the second shell.

[0026] In a possible implementation, the second shell is provided with a fixing groove, and the heat-conducting fitting is provided in the fixing groove.

[0027] In a possible implementation, the thickness of the second shell is L3, and L3 satisfies: 0.02 mm ≤ L3 ≤ 0.25 mm.

[0028] In a possible implementation, the second shell includes at least one of an aluminum-plastic film, a polymer film, and a metal film.

[0029] In a possible implementation, the thickness of the second material is L4, and L4 satisfies: 5 mm ≤ L4 ≤ 35 mm.

[0030] In a possible implementation, the second material includes at least one of a fire extinguishing material, an insulating material, a heat absorbing material, and a heat conducting material.

[0031] In a possible implementation, the thermally conductive fitting is an elastic member.

[0032] In a possible implementation, the thermally conductive connector includes a thermally conductive core and a connector covering the thermally conductive core.

[0033] In a possible implementation, a heat conducting rod is further provided in the first protective plate. The heat conducting rod extends along the second direction and is connected to the heat conducting core.

[0034] In a possible implementation, the thermal conductivity of the first protection plate is higher than the thermal conductivity of the second protection plate.

[0035] On the other hand, the present application provides a battery assembly comprising a plurality of battery cells and the above-mentioned cooling structure.

[0036] On the other hand, the present application provides a battery pack comprising the above-mentioned battery assembly.

[0037] On the other hand, the present application provides an electrical device including the above-mentioned battery assembly or the above-mentioned battery pack.

[0038] The present application provides a cooling structure, battery assembly, battery pack and electrical equipment. By arranging a first protective plate between adjacent battery cells, and arranging a second protective plate on one side of the first protective plate, and connecting it to a heat-conducting fitting through a heat-conducting connector, heat can be absorbed by the first protective plate from the side of the battery cell and transferred to the heat-conducting connector. The heat of the first protective plate is effectively transferred to the heat-conducting fitting through the heat-conducting fitting connected to the heat-conducting connector. The heat-conducting fitting is arranged on the second protective plate, and the heat-conducting fitting exchanges heat with the second protective plate, thereby effectively transferring heat to the second protective plate, and further dissipating heat through the second protective plate. By utilizing the heat-conducting connector and the heat-conducting fitting to absorb and exchange heat, the first protective plate having a larger contact area with the battery cell can conduct heat to the second protective plate, and release heat on the second protective plate. It can effectively absorb and release the heat generated by the battery cell, improve the heat dissipation efficiency of the battery cell, reduce the risk of battery overheating, thereby extending the service life of the battery, and improving the performance and safety of the battery. By creating accommodation spaces between adjacent first protective plates, space can be effectively utilized, maximizing the density of battery cells while ensuring that each cell receives adequate cooling. The combined design of multiple first and second protective plates allows the cooling structure to be compactly integrated into the battery assembly, eliminating the need for additional space while providing effective cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A schematic diagram of the cooling structure provided in an embodiment of the present application;

[0041] Figure 2 for Figure 1 One of the structural schematic diagrams of the first protective plate of the cooling structure shown;

[0042] Figure 3 for Figure 1 A schematic structural diagram of the second protective plate of the cooling structure shown;

[0043] Figure 4 for Figure 1 A schematic structural diagram of the connection between the first protective plate and the second protective plate is shown;

[0044] Figure 5 for Figure 1 The second structural diagram of the first protective plate of the cooling structure shown;

[0045] Figure 6 for Figure 1 The third structural diagram of the first protective plate of the cooling structure shown;

[0046] Figure 7 A schematic structural diagram of a second protective plate of a cooling structure provided by another embodiment of the present application;

[0047] Figure 8 A schematic structural diagram of a first protective plate of a cooling structure provided in another embodiment of the present application;

[0048] Figure 9 for Figure 7 and Figure 8 A schematic structural diagram of the connection between the first protective plate and the second protective plate is shown;

[0049] Figure 10 A schematic structural diagram of the connection between the first protective plate and the second protective plate provided in yet another embodiment of the present application.

[0050] Description of reference numerals:

[0051] 100-cooling structure; 10-first protective plate; 11-thermal conductive connector; 111-connecting portion; 112-clamping portion; 113-thermal conductive core; 114-connecting member; 12-first shell; 13-first material; 14-thermal conductive rod; 20-second protective plate; 21-thermal conductive fitting; 211-connecting groove; 212-clamping groove; 22-second shell; 221-fixing groove; 23-second material; 101-accommodating space. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0053] With the continuous development of electric vehicles, the requirements for their battery packs are also increasing. To ensure the safe use of battery packs, liquid cooling plates are often installed to dissipate heat from the battery cells. Specifically, heat insulation, heat absorption, heat dissipation, and heat-dissipating materials are placed between adjacent battery cells, combined with the heat dissipation structure of the liquid cooling plate to achieve heat dissipation from the battery pack.

[0054] However, the heat dissipation structure in the existing battery pack has poor heat dissipation effect due to its own structural limitations.

[0055] To overcome the shortcomings of the prior art, after repeated reflection and verification, the inventors discovered that if a first plate disposed between adjacent battery cells fully absorbs the heat generated by the battery cells, and a heat conductor with good thermal conductivity is disposed on the first plate, and a heat conductor with similarly good thermal conductivity is disposed on the second plate, the two heat conductors are in close contact, achieving efficient heat transfer. Furthermore, by connecting the second plate to the first plate via the two heat conductors, the first protective plate, which has a larger contact area with the battery cells, can transfer heat to the second protective plate, which then releases the heat. This effectively absorbs and releases heat generated by the battery cells, improving the heat dissipation efficiency of the battery cells.

[0056] In view of this, the present application provides a cooling structure for use in a battery assembly, wherein a plurality of battery cells in the battery assembly are arranged sequentially along a first direction, comprising:

[0057] A plurality of first protective plates are sequentially arranged along a first direction, with an accommodation space for accommodating the battery cells formed between adjacent first protective plates. A heat-conducting connector is provided on one side of the first protective plate along a second direction, and an angle is formed between the second direction and the first direction;

[0058] A second protective plate is provided on one side of the first protective plate along the second direction and extends along the first direction. The second protective plate is provided with a heat conducting fitting. The heat conducting fitting is provided on a side of the second protective plate facing the first protective plate and opposite to the heat conducting connector.

[0059] The heat-conducting connecting piece is connected to the heat-conducting matching piece to connect the first protective plate to the second protective plate.

[0060] By placing a first protective plate between adjacent battery cells and a second protective plate on one side of the first protective plate, connected to a thermally conductive fitting via a thermally conductive connector, heat is absorbed from the side of the battery cells by the first protective plate and transferred to the thermally conductive connector. The thermally conductive fitting, connected to the thermally conductive connector, effectively transfers the heat from the first protective plate to the thermally conductive fitting. The thermally conductive fitting is placed on the second protective plate and exchanges heat with the second protective plate, effectively transferring the heat to the second protective plate while further dissipating the heat through the second protective plate. By utilizing the thermally conductive connector and the thermally conductive fitting to absorb and exchange heat, the first protective plate, which has a larger contact area with the battery cells, can transfer heat to the second protective plate, where it is released. This effectively absorbs and releases heat generated by the battery cells, improving the heat dissipation efficiency of the battery cells, reducing the risk of battery overheating, thereby extending the battery life and improving battery performance and safety. By forming a storage space between adjacent first protective plates, space can be effectively utilized, maximizing the battery cell density while ensuring that each battery cell is adequately cooled. The combined design of multiple first protective plates and second protective plates enables the cooling structure to be compactly integrated into the battery assembly without taking up additional space while providing an effective cooling function.

[0061] The contents of this application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of this application more clearly and in detail.

[0062] The specific structure of the cooling structure and various possible implementation methods are described in detail below.

[0063] Figure 1 A schematic diagram of the cooling structure provided in an embodiment of the present application. Figure 2 for Figure 1 One of the structural schematic diagrams of the first protective plate of the cooling structure shown. Figure 3 for Figure 1 Schematic diagram of the structure of the second protective plate of the cooling structure shown. Figure 4 for Figure 1 The diagram shows the structure of the connection between the first protective plate and the second protective plate. Figure 5 for Figure 1 The second structural schematic diagram of the first protective plate of the cooling structure shown. Figure 6 for Figure 1 The third structural schematic diagram of the first protective plate of the cooling structure shown. Figure 7 A schematic structural diagram of a second protective plate of a cooling structure provided in another embodiment of the present application. Figure 8 A schematic structural diagram of a first protective plate of a cooling structure provided in another embodiment of the present application. Figure 9 for Figure 7 and Figure 8The diagram shows the structure of the connection between the first protective plate and the second protective plate. Figure 10 A schematic structural diagram of the connection between the first protective plate and the second protective plate provided in yet another embodiment of the present application.

[0064] like Figure 1 As shown, the cooling structure 100 provided in the embodiment of the present application is used in a battery assembly to dissipate heat from the battery cells in the battery assembly. The multiple battery cells in the battery assembly are arranged in sequence along a first direction x.

[0065] Please also see Figure 2 and Figure 3 The cooling structure 100 includes a plurality of first protective plates 10 and a second protective plate 20. The plurality of first protective plates 10 are arranged in sequence along the first direction x, and an accommodating space 101 for accommodating battery cells is formed between adjacent first protective plates 10. Along the second direction y, a thermally conductive connector 11 is provided on one side of the first protective plate 10. Along the second direction y, the second protective plate 20 is provided on one side of the first protective plate 10 and extends along the first direction x. The second protective plate 20 is provided with a thermally conductive fitting 21. The thermally conductive fitting 21 is provided on a side of the second protective plate 20 facing the first protective plate 10, and is opposite to the thermally conductive fitting 11.

[0066] The heat-conducting connecting member 11 is connected to the heat-conducting matching member 21 to connect the first protective plate 10 to the second protective plate 20 .

[0067] In one possible implementation, the thermally conductive connector 11 abuts against the thermally conductive fitting 21. The thermally conductive connector 11 and the thermally conductive fitting 21 have high thermal conductivity. The abutment allows the thermally conductive connector 11 and the thermally conductive fitting 21 to be in close contact, thereby achieving efficient heat transfer.

[0068] There is an angle between the second direction y and the first direction x.

[0069] In a possible implementation, the second direction y and the first direction x are perpendicular to each other.

[0070] The first protective plate 10 is a heat absorber between adjacent battery cells. The second protective plate 20 is perpendicular to the first protective plate 10 and realizes functions such as heat absorption, heat dissipation, and temperature uniformity.

[0071] By installing a first protective plate 10 between adjacent battery cells and positioning a second protective plate 20 on one side of the first protective plate 10, connected to a thermally conductive fitting 21 via a thermally conductive connector 11, heat is absorbed from the side of the battery cells by the first protective plate 10 and transferred to the thermally conductive connector 11. The thermally conductive fitting 21, which abuts the thermally conductive connector 11, effectively transfers the heat from the first protective plate 10 to the thermally conductive fitting 21. The thermally conductive fitting 21 is positioned on the second protective plate 20, exchanging heat with the second protective plate 20, effectively transferring heat to the second protective plate 20 while further dissipating heat through the second protective plate 20. By utilizing the heat-conducting connector 11 and the heat-conducting fitting 21 to absorb and exchange heat, the first protective plate 10, which has a larger contact area with the battery cell, can conduct heat to the second protective plate 20 and release the heat on the second protective plate 20. This effectively absorbs and releases the heat generated by the battery cell, improves the heat dissipation efficiency of the battery cell, reduces the risk of battery overheating, thereby extending the battery life and improving the battery performance and safety. By forming a storage space 101 between adjacent first protective plates 10, the space can be effectively utilized, the arrangement density of the battery cells can be maximized, and at the same time, each battery cell can be adequately cooled. The combined design of multiple first protective plates 10 and second protective plates 20 enables the cooling structure to be compactly integrated into the battery assembly without taking up additional space while providing an effective cooling function.

[0072] In a possible implementation, a soft and lightweight second protective plate 20 may be used in combination with a liquid cooling device to further improve the heat dissipation efficiency of the battery cell.

[0073] In a possible implementation, the thermal conductivity of the first protection plate 10 is higher than the thermal conductivity of the second protection plate 20 .

[0074] Please also see Figure 4 In one possible implementation, the thermally conductive connector 11 includes a connecting portion 111 and a clamping portion 112. The connecting portion 111 connects the clamping portion 112 to the first protective plate 10. The thermally conductive fitting 21 has a connecting groove 211 and a clamping groove 212 that communicate with each other. The connecting groove 211 is located on the side of the clamping groove 212 that faces the first protective plate 10. The connecting portion 111 is accommodated in the connecting groove 211, and the clamping portion 112 is accommodated in the clamping groove 212.

[0075] The design of the connecting portion 111 and the clamping portion 112 ensures close contact between the thermally conductive connector 11 and the thermally conductive mating component 21. The connecting portion 111 is accommodated in the connecting groove 211, and the clamping portion 112 is accommodated in the clamping groove 212, providing a direct heat conduction path, helping to more efficiently transfer heat from the first protective plate 10 to the second protective plate 20. At the same time, the clamping portion 112 is accommodated in the clamping groove 212, providing a stable mechanical connection, ensuring a tight connection between the first protective plate 10 and the second protective plate 20, reducing the risk of loosening under vibration or impact conditions, and improving the stability of the overall structure.

[0076] The design of the connecting portion 111, the clamping portion 112, the connecting groove 211, and the clamping groove 212 allows for quick and reliable assembly and disassembly of the first protective plate 10 and the second protective plate 20. The coordination of the clamping portion 112 and the clamping groove 212 allows for easy installation and removal of the assembly, reducing the complexity and cost of production and maintenance. Furthermore, automatic positioning is achieved, ensuring that the thermally conductive connector 11 is automatically aligned with the thermally conductive mating component 21 during installation, reducing the possibility of installation errors and improving production efficiency.

[0077] In a possible implementation, the first protective plate 10 is provided with a heat-conducting connector 11 .

[0078] In a possible implementation, the heat-conducting connector 11 extends along the third direction z, and the heat-conducting connector 11 is slidably disposed in the heat-conducting fitting 21 along the third direction z.

[0079] The first direction x, the second direction y and the third direction z are arranged to form an angle with each other.

[0080] In a possible implementation, the first direction x, the second direction y, and the third direction z are perpendicular to each other.

[0081] The heat conductive connector 11 extends along the third direction z, increasing the contact area between the first protective plate 10 and the second protective plate 20 for heat conduction, helping to improve the heat conduction efficiency and allowing heat to be transferred from the first protective plate 10 to the second protective plate 20 more quickly.

[0082] The sliding design of the thermal connector 11 provides excellent pull-off and frictional forces in the first and second directions (x and y), while providing weaker pull-off forces in the third direction (z), facilitating the connection between the first and second protective plates 10 and 20. This allows for fine-tuning during installation to ensure optimal contact and alignment between the first and second protective plates 10 and the battery cells, simplifying the installation process and improving the quality and performance of the final product. While providing flexibility, the sliding design of the thermal connector 11 also ensures stability under vibration or mechanical shock, reducing the risk of loosening and displacement and improving the reliability of the overall structure.

[0083] In a possible implementation, along the third direction z, the length of the thermally conductive connector 11 is the same as the length of the first protective plate 10 .

[0084] In one possible implementation, the cross-sectional shape of the thermally conductive connector 11 perpendicular to the first direction x includes at least one of a circle, a polygon, and a special shape. The polygon can be a regular polygon such as a triangle, a square, or a regular pentagon, or other polygons such as a T-shape. Special shapes can include ellipses, irregular circles, and the like. The shape of the thermally conductive fitting 21 matches that of the thermally conductive connector 11 to ensure stable connection between the first and second protective plates 10, 20. The shape can be set to a "T" shape to increase the cross-sectional area in the heat transfer direction.

[0085] The cross-sectional shape of the thermal connector 11 can be optimized based on specific application requirements and space constraints, allowing the cooling structure 100 to achieve an optimal balance between thermal management and mechanical performance. T-shaped, circular, triangular, and square shapes generally offer good structural strength and stability, as well as a large heat transfer area.

[0086] Among them: The T-shaped cross-section provides a larger contact area, increases the cross-sectional area perpendicular to the heat conduction direction, helps improve heat conduction efficiency, and can provide additional mechanical support in specific directions; the circular cross-section is symmetrical, can evenly disperse heat, and adapt to multi-directional thermal expansion. The circular cross-section can also rotate freely within a limited space; the triangular cross-section can provide good structural strength while optimizing the heat conduction path in a specific direction; the square cross-section provides a uniform contact surface and is suitable for application scenarios that require structural symmetry. T-shaped and square cross-sections can provide higher bending strength, while the triangular cross-section excels in withstanding compressive forces.

[0087] Please also see Figure 5 In a possible implementation, the first protective plate 10 includes a first shell 12 and a first material 13 filled in the first shell 12 .

[0088] The first housing 12 provides external mechanical support and protection and can withstand external physical impact and pressure. The material and structural design of the first housing 12 can be optimized according to application requirements to provide the necessary strength and rigidity.

[0089] The first material 13 filled in the first shell 12 can be a material with high thermal conductivity, such as thermally conductive adhesive or metal powder. This helps improve the overall thermal conductivity efficiency of the first protective plate 10 and quickly transfers the heat generated by the battery cells to the cooling structure 100. By selecting a lightweight material as the first material 13, the overall weight of the cooling structure 100 can also be effectively controlled. If the first material 13 is a material with thermal insulation properties, it can also effectively reduce heat transfer between the battery cells, prevent overheating, and improve the safety and efficiency of the battery assembly.

[0090] The first shell 12 and the first material 13 can be made of different material combinations according to specific application requirements. For example, the first shell 12 can be made of metal to improve strength, while the first filling material 13 can be made of polymer to reduce weight.

[0091] In a possible implementation, the first material 13 is encapsulated in the first shell 12. The thermally conductive connector 11 is connected to the first shell 12 at an edge of the encapsulation portion on one side of the first shell 12.

[0092] In a possible implementation, the first shell 12 may be in any shape, including but not limited to a rectangle or a square.

[0093] Optionally, the first shell 12 can be set to maintain the same or similar size as the adjacent battery cells to save the space occupied by the first protective plate 10 when assembling the module and improve volume utilization.

[0094] In a possible implementation, the first housing 12 is made of an insulating packaging material, including at least one of an aluminum-plastic film, a polymer film, and a metal film, wherein the polymer may be nylon, polyimide, polypropylene, polyethylene, polyvinyl chloride, or the like.

[0095] These membrane materials are typically lightweight, helping to reduce the overall weight of the structure. Furthermore, they are easy to process and form, suitable for complex design requirements, and can be easily assembled through methods such as heat sealing and bonding. They also offer excellent barrier properties, chemical resistance, electrical insulation, and a certain degree of mechanical strength and flexibility. Furthermore, these membrane materials are relatively low-cost, suitable for large-scale production, and can effectively reduce manufacturing costs.

[0096] Among them, aluminum-plastic film has excellent barrier properties, effectively preventing the penetration of moisture and oxygen, protecting internal materials and battery cells from environmental influences. Nylon film offers good wear resistance and barrier properties, suitable for applications requiring additional mechanical protection. Polyimide film has excellent chemical resistance and high temperature resistance, suitable for battery components that need to operate in harsh environments. Polypropylene film and polyethylene film provide good chemical corrosion resistance and are suitable for use in a variety of chemical environments. Nylon film and polyimide film also provide high strength and good flexibility, able to withstand mechanical stress and deformation. Polyvinyl chloride film has good flexibility and impact resistance, suitable for applications requiring a certain degree of elasticity. Polyimide film and polyvinyl chloride film have excellent electrical insulation properties, which can effectively prevent electrical short circuits and improve the safety of battery components.

[0097] In a possible implementation, the thickness of the first shell 12 is L1, and L1 satisfies: 0.02 mm ≤ L1 ≤ 0.25 mm.

[0098] The thickness range of 0.02 mm to 0.25 mm can provide sufficient mechanical strength to protect the battery cells and the first material 13 inside the battery assembly, while maintaining a certain flexibility to allow it to withstand certain mechanical stress and deformation during installation and use.

[0099] A thinner first housing 12, such as 0.05 mm, 0.1 mm, or 0.25 mm, helps reduce the weight of the overall structure, while a moderate thickness, such as 0.25 mm, provides mechanical protection while allowing for effective heat conduction, helping to dissipate heat and prevent battery overheating.

[0100] At the same time, the 0.02mm-0.25mm thickness range offers low material costs, making it suitable for large-scale production and effectively reducing manufacturing costs while ensuring product performance. Furthermore, materials within this thickness range are easy to process and form, suitable for complex shape designs, and can be easily assembled through methods such as heat sealing and bonding.

[0101] In one possible implementation, the first material 13 is a liquid working fluid capable of phase change, including but not limited to phase change materials, gels, and composites of phase change materials and thermal insulation materials. The phase change material includes at least one of water, fluorinated liquid, silicone oil, silica sol, aluminum sol, zirconium sol, silica-alumina sol, silica-zirconium sol, aluminum-zirconium sol, silica-alumina-zirconium sol, paraffin wax, calcium chloride hexahydrate solution, sodium sulfate decahydrate solution, barium hydroxide octahydrate solution, and magnesium chloride hexahydrate solution. The thermal insulation material includes at least one of aerogel, glass fiber, zirconia fiber, mullite fiber, silica fiber, aluminum oxide fiber, rock wool, aluminum silicate fiber, and pre-oxidized silk fiber.

[0102] Phase change materials regulate temperature through their phase transitions, while thermal insulation effectively reduces heat conduction, maintaining a stable temperature within the battery pack. Composite material designs can be customized to suit varying temperature and humidity conditions, ensuring the reliability of battery packs in a variety of environments.

[0103] With a variety of phase change materials and thermal insulation materials to choose from, you can select the right material combination based on specific application requirements and environmental conditions to achieve optimal thermal management performance. Battery components can operate at a higher energy efficiency level, thereby improving the performance of the overall system.

[0104] By regulating and stabilizing the temperature, the combination of phase change materials and thermal insulation materials can effectively reduce the risk of thermal runaway, improve the safety of battery components, help reduce the thermal stress of the battery, and thus extend the service life of the battery.

[0105] In a possible implementation, the thickness of the first material 13 is L2, and L2 satisfies: 0.5 mm ≤ L2 ≤ 6 mm, and its value is related to the capacity of the battery cell.

[0106] The thickness range of 0.5mm-6mm can provide greater heat capacity, help absorb or release more heat, keep the temperature of battery components stable, and at the same time, enhance the effect of thermal insulation materials, reduce heat conduction between battery cells, and maintain constant internal temperature.

[0107] Thicker first material 13, such as 1.5 mm, 2.5 mm, 4 mm, and 6 mm, allows for more phase change material to be present, thereby providing greater heat capacity, helping to absorb or release more heat during temperature changes and maintain a stable temperature of the battery assembly. Thinner first material 13, such as 0.5 mm and 1 mm, helps reduce the weight of the overall structure.

[0108] The thickness range of 0.5mm-6mm provides a certain degree of mechanical support and buffering capacity, which can absorb vibration and shock to a certain extent and protect battery components from physical damage. The thickness range of 0.5mm-6mm provides design flexibility, allowing for optimized design based on specific application requirements and space constraints to achieve optimal thermal management and mechanical performance.

[0109] In a possible implementation, the first protective plate 10 further includes a heat conducting rod 14 . The heat conducting rod 14 is disposed in the first shell 12 and extends along the second direction y.

[0110] The introduction of the heat conducting rod 14 provides an efficient heat conduction path, quickly transferring heat from the first housing 12 to the heat conducting connector 11, helping to more evenly distribute heat and prevent local overheating. By extending the heat conducting rod 14 along the second direction y, heat can be evenly distributed over a larger area, thereby improving the temperature uniformity of the entire battery assembly.

[0111] Furthermore, the heat conducting rod 14 not only provides a heat conduction function, but also increases the mechanical strength and stability of the first protective plate 10 , and can enhance the rigidity of the first protective plate 10 to a certain extent, and resist external impact and vibration.

[0112] In a possible implementation, the heat conducting rod 14 is connected to the heat conducting connector 11 .

[0113] By connecting the thermally conductive rod 14 to the thermally conductive connector 11, a continuous heat conduction path is formed, which can more efficiently transfer heat from the battery cell to the second protective plate 20, thereby improving the overall thermal management efficiency. Connecting the thermally conductive rod 14 and the thermally conductive connector 11 helps to evenly distribute heat over a larger range, reduce the formation of local hot spots, and thus improve the temperature uniformity of the battery assembly.

[0114] At the same time, this connection method can reduce the complexity of the thermal management system, optimize the internal structure layout, make the design more compact and efficient, and increase the mechanical strength and stability of the overall structure to resist external shock and vibration.

[0115] In a possible implementation, the heat-conducting connectors 11 include a plurality of heat-conducting connectors 11 , each corresponding to the heat-conducting rod 14 .

[0116] Please also see Figure 8 and Figure 9 In one possible implementation, the heat conducting rod 14 is integrally formed with the heat conducting connector 11. For example, the heat conducting connector 11 may be conical and directly inserted into the heat conducting fitting 21 to stably connect the first protective plate 10 and the second protective plate 20.

[0117] The one-piece design eliminates the interface between the heat-conducting rod 14 and the heat-conducting connector 11, thereby reducing thermal resistance and forming a continuous heat conduction path. This allows for more efficient heat transfer and improves overall thermal management performance. Furthermore, the one-piece structure is more robust, providing better mechanical strength and stability. This helps protect the battery components from external shock and vibration. One-piece molding also reduces the number of components and assembly steps, thereby simplifying the manufacturing process, improving production efficiency, and reducing production costs.

[0118] Please also see Figure 6 and Figure 7In one possible implementation, along the first direction x, the number of thermally conductive rods 14 on the first protective plate 10 located in the middle of the multiple battery cells is greater than the number of thermally conductive rods 14 on the first protective plate 10 located on both sides of the multiple battery cells.

[0119] The battery cells in the middle position are usually subject to heat accumulation from multiple directions, so more efficient thermal management is required. Increasing the number of heat-conducting rods 14 on the middle first protective plate 10 can more effectively disperse and conduct heat, prevent local overheating, and thus distribute heat more evenly, reduce temperature gradients, and improve the temperature uniformity of the entire battery assembly.

[0120] Furthermore, increasing the number of heat conducting rods 14 where needed and reducing the number of heat conducting rods 14 on the two sides where less heat is generated can achieve effective utilization of materials and resources, reduce costs, and achieve optimal thermal management performance.

[0121] In a possible implementation, the heat conducting rod 14 includes at least one of a metal material, an inorganic non-metallic material, and a composite material, wherein the inorganic non-metallic material may be graphite.

[0122] Metal materials all have excellent thermal conductivity. Metals such as copper and aluminum have extremely high thermal conductivity and can conduct heat quickly and efficiently, which makes metal thermal conductive rods very suitable for applications that require efficient thermal management; inorganic non-metallic materials such as graphite materials also have good thermal conductivity, especially anisotropic graphite sheets, which have very high thermal conductivity in the planar direction and are suitable for efficient heat conduction in specific directions.

[0123] Metals, inorganic non-metallic materials, and composite materials can be selected and optimized based on specific application requirements. For example, copper has extremely high thermal conductivity, while aluminum offers a good balance between weight and cost. Graphite offers excellent thermal conductivity and high-temperature resistance.

[0124] The metal thermal conductive rod also provides good mechanical strength and structural stability, and can resist external shock and vibration. The graphite material has good heat resistance and chemical stability.

[0125] In a possible implementation, the second protective plate 20 includes a second shell 22 and a second material 23 filled in the second shell 22 , and the thermally conductive fitting 21 is disposed on the second shell 22 .

[0126] Filling the second housing 22 with the second material 23 effectively disperses and absorbs thermal stress, reducing structural damage caused by thermal expansion and contraction. Highly thermally conductive materials can be selected for the second material 23, effectively transferring heat from the thermally conductive fitting 21 to the external environment. This facilitates faster heat transfer and improves the cooling efficiency of the entire system. The second housing 22 provides the necessary mechanical strength and stability, protecting the second material 23 within.

[0127] The second material 23 can be selected and adjusted based on specific needs. For example, a material with phase change properties can be selected to further enhance the cooling effect, or a material with insulating properties can be selected to prevent heat from flowing back into the battery assembly. Alternatively, the second material 23 can be flame-retardant or high-temperature resistant. When an abnormality occurs in the battery assembly, the second material 23 is released to protect the battery cell, further improving system safety and preventing thermal runaway under extreme conditions.

[0128] The heat-conducting fitting 21 provided on the second shell 22 can efficiently transfer heat, thereby helping to quickly dissipate heat and maintain a stable temperature of the battery assembly.

[0129] In a possible implementation, the second shell 22 is provided with a fixing groove 221 , and the heat conducting fitting 21 is disposed in the fixing groove 221 .

[0130] In a possible implementation, the second material 23 is encapsulated in the second shell 22 .

[0131] In a possible implementation, the second shell 22 may be in any shape, including but not limited to a rectangle or a square.

[0132] Optionally, the second shell 22 can be set to maintain the same or similar dimensions as the cross-sectional shape of the battery cell and the first protective plate 10 after stacking, so as to save the space occupied by the second protective plate 20 when assembling the module and improve volume utilization.

[0133] In a possible implementation, the thickness of the second shell 22 is L3, and L3 satisfies: 0.02 mm ≤ L3 ≤ 0.25 mm.

[0134] The thickness range of 0.02 mm to 0.25 mm can provide sufficient mechanical strength to protect the thermally conductive fitting 21 and the second material 23 , while maintaining a certain degree of flexibility to allow it to withstand certain mechanical stress and deformation during installation and use.

[0135] A relatively thin second housing 22, such as 0.05 mm, 0.1 mm, or 0.25 mm, helps reduce the weight of the overall structure, while a moderate thickness, such as 0.25 mm, provides mechanical protection while allowing for effective heat conduction, helping to dissipate heat and prevent battery overheating.

[0136] At the same time, the 0.02mm-0.25mm thickness range offers low material costs, making it suitable for large-scale production and effectively reducing manufacturing costs while ensuring product performance. Furthermore, materials within this thickness range are easy to process and form, suitable for complex shape designs, and can be easily assembled through methods such as heat sealing and bonding.

[0137] In a possible implementation, the second housing 22 is made of an insulating packaging material, including at least one of an aluminum-plastic film, a polymer film, and a metal film, wherein the polymer may be nylon, polyimide, polypropylene, polyethylene, polyvinyl chloride, or the like.

[0138] These membrane materials are typically lightweight, helping to reduce the overall weight of the structure. Furthermore, they are easy to process and form, suitable for complex design requirements, and can be easily assembled through methods such as heat sealing and bonding. These membranes also offer excellent barrier properties, chemical resistance, electrical insulation, and a certain degree of mechanical strength and flexibility, allowing them to withstand mechanical stress and deformation while providing protection. Furthermore, these membrane materials are relatively low-cost, suitable for large-scale production, and can effectively reduce manufacturing costs.

[0139] Among them, aluminum-plastic film has excellent barrier properties, effectively preventing the penetration of moisture and oxygen, protecting internal materials and battery cells from environmental influences. Nylon film offers good wear resistance and barrier properties, suitable for applications requiring additional mechanical protection. Polyimide film has excellent chemical resistance and high temperature resistance, suitable for battery components that need to operate in harsh environments. Polypropylene film and polyethylene film provide good chemical corrosion resistance and are suitable for use in a variety of chemical environments. Nylon film and polyimide film also provide high strength and good flexibility, able to withstand mechanical stress and deformation. Polyvinyl chloride film has good flexibility and impact resistance, suitable for applications requiring a certain degree of elasticity. Polyimide film and polyvinyl chloride film have excellent electrical insulation properties, which can effectively prevent electrical short circuits and improve the safety of battery components.

[0140] In a possible implementation, the thickness of the second material 23 is L4, and L4 satisfies: 5 mm ≤ L4 ≤ 35 mm, and its value is related to the capacity of the battery cell.

[0141] The 5mm to 35mm thickness range offers a large thermal capacity and provides design flexibility, allowing for optimized designs based on specific application needs and space constraints for optimal thermal management and mechanical performance.

[0142] A larger thickness of the second material 23, such as 8mm, 12mm, 16mm, 25mm, or 35mm, allows for sufficient second material 23 to participate in the thermal management process, providing greater heat capacity. This helps absorb or release more heat during temperature fluctuations, maintaining a stable temperature for the battery assembly. A larger thickness of the second material 23 also enhances the thermal insulation effect of the material, reducing heat conduction to the outside world and maintaining a constant internal temperature.

[0143] The thickness of 5mm to 35mm provides certain mechanical support and buffering capabilities, which can absorb vibration and impact to a certain extent and protect battery components from physical damage.

[0144] In one possible implementation, the second material 23 includes at least one of a fire-extinguishing material, an insulating material, a heat-absorbing material, and a heat-conducting material. It can absorb, store, and dissipate heat when no leakage occurs, and provide insulation, cooling, and fire-extinguishing properties when a leak occurs. The material can include fluorinated liquid, superabsorbent resin, and the like.

[0145] These materials generally have good chemical stability and environmental tolerance, and can maintain stable performance under various operating conditions. They can be combined and optimized according to specific application requirements to achieve optimal thermal management, safety and electrical performance.

[0146] Fire-extinguishing materials can actively suppress the spread of flames in the event of thermal runaway or fire, reducing the severity of the accident and improving the overall safety of the battery assembly. Insulating materials can provide excellent electrical insulation, preventing the risk of electrical short circuits and leakage, and ensuring the safe operation of the battery assembly. Heat-absorbing materials can absorb large amounts of heat when the temperature rises, reducing the peak temperature of the battery assembly and preventing overheating. Thermally conductive materials can quickly disperse heat over a larger area or transfer it to the cooling system through efficient heat conduction, maintaining temperature uniformity across the battery.

[0147] In a possible implementation, the second material 23 is a liquid material with cooling and fire extinguishing properties. The second shell 22 is provided with a release port, which is used to open when subjected to a preset pressure to release the second material 23.

[0148] When thermal runaway occurs, the pressure on the release port increases, causing the release port to fail, thereby releasing the second material 23 in the second shell 22. The second material 23 can flow along the first protective plate 10, directly cooling the battery cell and extinguishing the fire, thereby quickly responding to emergency cooling and fire extinguishing needs, helping to quickly reduce the battery cell temperature and prevent further damage caused by the spread of fire, thereby improving the overall safety of the battery assembly.

[0149] Through the design of the release port, the system can automatically respond to thermal runaway events without the need for additional sensors or control systems, thereby improving the reliability and response speed of the system.

[0150] In a possible implementation, the release port may be any surface defect, including but not limited to a reduction in the package width of the second shell 22 , a reduction in the package thickness of the second shell 22 , or solder paste having a temperature corresponding to thermal runaway.

[0151] In a possible implementation, the release port is formed by reducing the thickness of a partial area of ​​the second shell 22 .

[0152] In another possible implementation, the release port is formed by solder paste that seals the second housing 22 .

[0153] By reducing the thickness of the second shell 22 or using solder paste, the strength and opening pressure of the release port can be precisely controlled, so that the system can reliably trigger the release under preset conditions, ensuring a quick response in emergency situations.

[0154] Furthermore, reducing the thickness of the second housing 22 and using solder paste are both relatively simple manufacturing processes that do not require complex mechanical components or additional assembly steps, helping to reduce production costs and simplify the manufacturing process. Depending on specific application requirements, the reduced thickness of the second housing 22 or the properties of the solder paste can be adjusted to accommodate varying pressure and temperature conditions, providing a flexible design solution.

[0155] In one possible implementation, the thermal connector 11 is a solid structure made of one or more of a high-thermal-conductivity metal, an inorganic non-metallic material, or a composite material. It is secured to the second protective plate 20 by snapping into the connection slot 211 and the snap-in slot 212 of the thermally conductive fitting 21. The thermally conductive rod 14 is directly or indirectly connected to the thermal connector 11 and can be made of one or more of a high-thermal-conductivity metal, an inorganic non-metallic material, or a composite material.

[0156] Please also see Figure 10 In a possible implementation, the thermally conductive connector 11 is a layered structure, including a thermally conductive core 113 and a connector 114 covering the thermally conductive core 113 .

[0157] By integrating the thermally conductive material internally and wrapping it with other materials, costs can be saved or the toughness of the contact surface of the thermally conductive connector 11 can be improved. This structural design facilitates installation and disassembly, simplifies system assembly and maintenance, and reduces maintenance costs and time. Different material combinations can be selected based on specific application requirements. For example, a high thermal conductivity material can be used for the thermal core 113, while a high-temperature or chemical-resistant material can be used for the connector 114.

[0158] At the same time, the heat-conducting core 113 has high heat conduction efficiency and is usually made of a high thermal conductivity material, such as copper or aluminum, which can conduct heat quickly and effectively, ensuring that heat can be quickly transferred from the first protective plate 10 to the second protective plate 20.

[0159] Connector 114 encases thermally conductive core 113, providing mechanical protection from external environmental damage, such as shock, vibration, or chemical corrosion. Connector 114 also enhances the overall stability of the structure. Connector 114 can be designed to have a certain degree of elasticity or flexibility to compensate for thermal expansion or contraction due to temperature changes, maintaining a stable mechanical connection and thermal contact.

[0160] In a possible implementation, the heat conducting rod 14 provided in the first protective plate 10 is connected to the heat conducting core 113 .

[0161] In a possible implementation, the heat-conducting fitting 21 is an elastic piece, and the material may be one or more of rubber and plastic that are high-temperature resistant, elastic, and have high thermal conductivity.

[0162] The elastic member can adapt to surface irregularities or slight deformations, ensuring good contact between the thermally conductive fitting 21 and the thermally conductive connector 11, thereby improving heat transfer efficiency. As materials typically expand or contract with temperature changes, the elastic member can compensate for these dimensional changes, maintaining stable thermal contact and mechanical connection.

[0163] At the same time, elastic parts have good shock absorption and buffering capabilities, which can absorb and relieve mechanical stress caused by vibration or impact, protect battery components and other sensitive components, reduce local stress concentration, and extend the service life of components.

[0164] Moreover, the elastic member is easy to install and disassemble, which simplifies the assembly and maintenance process of the system and reduces maintenance costs and time.

[0165] The cooling structure 100 provided in the embodiment of the present application includes a plurality of first protective plates 10 and a second protective plate 20. A plurality of first protective plates 10 are arranged in sequence along the first direction x, and an accommodating space 101 for accommodating battery cells is formed between adjacent first protective plates 10. Along the second direction y, a thermally conductive connector 11 is provided on one side of the first protective plate 10. Along the second direction y, the second protective plate 20 is provided on one side of the first protective plate 10 and extends along the first direction x. The second protective plate 20 is provided with a thermally conductive fitting 21. The thermally conductive fitting 21 is provided on a side of the second protective plate 20 facing the first protective plate 10 and is opposite to the thermally conductive fitting 11. The thermally conductive fitting 11 abuts against the thermally conductive fitting 21 to connect the first protective plate 10 with the second protective plate 20.

[0166] By installing a first protective plate 10 between adjacent battery cells and positioning a second protective plate 20 on one side of the first protective plate 10, connected to a thermally conductive fitting 21 via a thermally conductive connector 11, heat is absorbed from the side of the battery cells by the first protective plate 10 and transferred to the thermally conductive connector 11. The thermally conductive fitting 21, which abuts the thermally conductive connector 11, effectively transfers the heat from the first protective plate 10 to the thermally conductive fitting 21. The thermally conductive fitting 21 is positioned on the second protective plate 20, exchanging heat with the second protective plate 20, effectively transferring heat to the second protective plate 20 while further dissipating heat through the second protective plate 20. By utilizing the heat-conducting connector 11 and the heat-conducting fitting 21 to absorb and exchange heat, the first protective plate 10, which has a larger contact area with the battery cell, can conduct heat to the second protective plate 20 and release the heat on the second protective plate 20. This effectively absorbs and releases the heat generated by the battery cell, improves the heat dissipation efficiency of the battery cell, reduces the risk of battery overheating, thereby extending the battery life and improving the battery performance and safety. By forming a storage space 101 between adjacent first protective plates 10, the space can be effectively utilized, the arrangement density of the battery cells can be maximized, and at the same time, each battery cell can be adequately cooled. The combined design of multiple first protective plates 10 and second protective plates 20 enables the cooling structure to be compactly integrated into the battery assembly without taking up additional space while providing an effective cooling function.

[0167] The present application also provides a battery assembly including a plurality of battery cells and the cooling structure 100. The plurality of battery cells are arranged in sequence, a first protective plate 10 is provided between adjacent battery cells, and a second protective plate 20 is provided on one side of the plurality of battery cells.

[0168] Since the battery assembly in this embodiment includes the cooling structure 100 described in any of the above embodiments, the structure and beneficial effects of the battery assembly including the cooling structure 100 will not be further described in this embodiment.

[0169] An embodiment of the present application also provides a battery pack comprising the above-mentioned battery assembly.

[0170] In addition, embodiments of the present application further provide an electrical device comprising the aforementioned battery assembly or battery pack. The electrical device further comprises an electrical device. The battery assembly or battery pack is used to provide electrical energy to the electrical device.

[0171] The electrical equipment in the embodiments of the present application may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the electrical device may be the vehicle's drive mechanism or the vehicle's control system.

[0172] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0173] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0174] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0175] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes the meaning of “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0176] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling structure for a battery assembly, wherein a plurality of battery cells in the battery assembly are arranged sequentially along a first direction, characterized in that: include: A plurality of first protective plates (10) are sequentially arranged along a first direction, with an accommodation space (101) for accommodating the battery core formed between adjacent first protective plates (10), and a heat-conducting connector (11) is provided on one side of the first protective plate (10) along a second direction, with an angle being formed between the second direction and the first direction; A second protective plate (20), along the second direction, the second protective plate (20) is arranged on one side of the first protective plate (10) and extends along the first direction, the second protective plate (20) is provided with a heat-conducting fitting (21), the heat-conducting fitting (21) is arranged on a side of the second protective plate (20) facing the first protective plate (10) and opposite to the heat-conducting connecting piece (11); The heat-conducting connecting piece (11) is connected to the heat-conducting matching piece (21) to connect the first protective plate (10) to the second protective plate (20).

2. The cooling structure according to claim 1, characterized in that: The heat-conducting connecting piece (11) comprises a connecting portion (111), and the heat-conducting fitting (21) is provided with a connecting groove (211), wherein the connecting portion (111) is accommodated in the connecting groove (211).

3. The cooling structure according to claim 2, characterized in that: The heat-conducting connecting piece (11) further includes a clamping portion (112), wherein the connecting portion (111) connects the clamping portion (112) and the first protective plate (10), and the heat-conducting fitting (21) is further provided with a clamping groove (212) connected to the connecting groove (211), wherein the connecting groove (211) is located on a side of the clamping groove (212) facing the first protective plate (10), and the clamping portion (112) is accommodated in the clamping groove (212).

4. The cooling structure according to claim 1, characterized in that: The heat-conducting connecting piece (11) extends along a third direction, and the heat-conducting connecting piece (11) is slidably arranged in the heat-conducting matching piece (21) along the third direction, and the first direction, the second direction and the third direction are arranged at an angle to each other.

5. The cooling structure according to claim 1, characterized in that: The cross-sectional shape of the heat-conducting connecting member (11) perpendicular to the first direction includes at least one of a circle and a polygon.

6. The cooling structure according to any one of claims 1 to 5, characterized in that: The first protective plate (10) comprises a first shell (12) and a first material (13) filled in the first shell (12).

7. The cooling structure according to claim 6, characterized in that: The first shell (12) comprises at least one of an aluminum-plastic film, a polymer film and a metal film.

8. The cooling structure according to claim 6, characterized in that: The thickness of the first shell (12) is L1, and L1 satisfies: 0.02mm≤L1≤0.25mm.

9. The cooling structure according to claim 6, characterized in that: The first material (13) includes phase change material, gel, or a composite of phase change material and heat insulation material.

10. The cooling structure according to claim 9, characterized in that: The phase change material includes at least one of water, fluoride liquid, silicone oil, silica sol, aluminum sol, zirconium sol, silica aluminum sol, silica zirconium sol, aluminum zirconium sol, silica aluminum zirconium sol, paraffin, calcium chloride hexahydrate solution, sodium sulfate decahydrate solution, barium hydroxide octahydrate solution, and magnesium chloride hexahydrate solution; the thermal insulation material includes at least one of aerogel, glass fiber, zirconium oxide fiber, mullite fiber, silica fiber, aluminum oxide fiber, rock wool, aluminum silicate fiber, and pre-oxidized silk fiber.

11. The cooling structure according to claim 6, characterized in that: The thickness of the first material (13) is L2, and L2 satisfies: 0.5mm≤L2≤6mm.

12. The cooling structure according to claim 6, characterized in that: The first protective plate (10) further includes a heat conducting rod (14), which is disposed in the first shell (12) and extends along the second direction.

13. The cooling structure according to claim 12, characterized in that: The heat conducting rod (14) is connected to the heat conducting connecting piece (11).

14. The cooling structure according to claim 13, characterized in that: The heat conducting rod (14) and the heat conducting connector (11) are integrally formed.

15. The cooling structure according to claim 12, characterized in that: Along a first direction, the number of the heat-conducting rods (14) on the first protective plate (10) located in the middle of the plurality of battery cells is greater than the number of the heat-conducting rods (14) on the first protective plate (10) located on both sides of the plurality of battery cells.

16. The cooling structure according to claim 12, characterized in that: The heat conducting rod (14) comprises a metal material, an inorganic non-metallic material or a composite material.

17. The cooling structure according to any one of claims 1 to 5, characterized in that: The second protective plate (20) comprises a second shell (22) and a second material (23) filled in the second shell (22); the heat-conducting fitting (21) is arranged on the second shell (22).

18. The cooling structure according to claim 17, characterized in that: The second shell (22) is provided with a fixing groove (221), and the heat-conducting fitting (21) is arranged in the fixing groove (221).

19. The cooling structure according to claim 17, characterized in that The thickness of the second shell (22) is L3, and L3 satisfies: 0.02mm≤L3≤0.25mm.

20. The cooling structure according to claim 17, characterized in that The second shell (22) includes at least one of an aluminum-plastic film, a polymer film and a metal film.

21. The cooling structure according to claim 17, characterized in that The thickness of the second material (23) is L4, and L4 satisfies: 5mm≤L4≤35mm.

22. The cooling structure according to claim 17, characterized in that The second material (23) includes at least one of a fire extinguishing material, an insulating material, a heat absorbing material, and a heat conducting material.

23. The cooling structure according to any one of claims 1 to 5, characterized in that: The heat-conducting fitting (21) is an elastic piece.

24. The cooling structure according to any one of claims 1 to 5, characterized in that: The heat-conducting connecting piece (11) comprises a heat-conducting core (113) and a connecting piece (114) covering the heat-conducting core (113).

25. The cooling structure according to claim 24, characterized in that A heat conducting rod (14) is further provided in the first protective plate (10), the heat conducting rod (14) extending along the second direction, and the heat conducting rod (14) being connected to the heat conducting core (113).

26. The cooling structure according to any one of claims 1 to 5, characterized in that: The thermal conductivity of the first protection plate (10) is higher than the thermal conductivity of the second protection plate (20).

27. A battery assembly, characterized in that: The invention comprises a plurality of battery cells and a cooling structure (100) as claimed in any one of claims 1 to 26.

28. A battery pack, characterized in that: Comprising the battery assembly of claim 27.

29. An electrical device, characterized in that: Comprising the battery assembly as claimed in claim 27 or the battery pack as claimed in claim 28.

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