Battery pack tray, battery pack and electric equipment

Abstract

The embodiment of the invention provides a battery pack tray, a battery pack and electric equipment. Relates to the technical field of batteries. The battery pack tray comprises a tray body and repairing liquid. The tray body is provided with a tray cavity for placing a battery module; an accommodating cavity is formed in the tray body; the repairing liquid is located in the containing cavity. The repair liquid comprises a curing material. According to the battery pack tray provided by the embodiment of the invention, the accommodating cavity is formed in the tray and is filled with the repairing liquid, so that when the tray body is broken due to external impact on the battery pack tray, the repairing liquid can flow out of the accommodating cavity to a damaged area and is cured, and a curing material flows to fill the damaged part. And the battery pack tray has self-repairing capability after being damaged, so that the use performance of the battery pack tray is improved.

Description

Technical Field

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

[0002] The battery pack tray is the core load-bearing structure of the electric vehicle battery system, and its anti-collision design is directly related to battery safety.

[0003] In related technologies, electric vehicles operate under extremely complex operating and road conditions. Flying rocks, foreign objects on the road, and impacts can all damage the battery pack tray. To improve the battery pack tray's collision resistance, high-strength materials such as steel and carbon fiber reinforced plastic are often used. Additionally, steel or composite protective plates are installed on the bottom of the battery pack tray.

[0004] However, existing battery pack trays have the problem of being unable to self-repair after being damaged. Summary of the Invention

[0005] The embodiments of the present application provide a battery pack tray, a battery pack, and an electrical device, which are used to achieve self-repair of the battery pack tray after damage, extend the service life of the battery pack tray, and improve the performance of the battery pack tray.

[0006] In a first aspect, an embodiment of the present application provides a battery pack tray, comprising:

[0007] The tray body has a tray cavity for placing the battery module; a receiving cavity is formed inside the tray body;

[0008] The repairing fluid is located in the accommodating cavity; the repairing fluid includes a curing material.

[0009] In some embodiments of the present application, the tray body includes side beams and a bottom plate, the side beams are connected to the bottom plate and arranged along the circumference of the bottom plate, and the bottom plate and the side beams surround to form a tray cavity for accommodating the battery module.

[0010] The bottom plate forms the accommodating cavity.

[0011] In some embodiments of the present application, the repair fluid further includes a thickening material.

[0012] In some embodiments of the present application, the curing material is in liquid state.

[0013] The thickening material is in granular form.

[0014] In some embodiments of the present application, the repair liquid is a suspension.

[0015] In some embodiments of the present application, the curing material includes at least one of silicone glue, cyanoacrylate, epoxy resin, and water-based acrylic acid.

[0016] In some embodiments of the present application, the thickening material includes at least one of polymethyl methacrylate, polystyrene, and polycarbonate.

[0017] In some embodiments of the present application, the volume of the thickening material is A, and the volume of the solidifying material is B, wherein A / (A+B)=C, and C satisfies: 45%≤C≤55%.

[0018] In some embodiments of the present application, the density of the solidified material is ρ1, and ρ1 satisfies: 1.0 g / cm 3 ≤ρ1≤1.2g / cm 3 .

[0019] And / or, the density of the thickening material is ρ2, ρ2 satisfies: 1.0g / cm 3 ≤ρ2≤1.2g / cm 3 .

[0020] In some embodiments of the present application, the size of the thickening material is smaller than the capillary size of the solidifying material.

[0021] In some embodiments of the present application, the size of the thickening material is D, and D satisfies: 10 μm≤D≤100 μm.

[0022] In some embodiments of the present application, the capillary size of the solidified material is E, and E satisfies: 0.8 mm ≤ E ≤ 1.3 mm.

[0023] In some embodiments of the present application, the repair fluid further includes a color developer.

[0024] In some embodiments of the present application, the color developer includes a fluorescent agent.

[0025] In some embodiments of the present application, the tray body is provided with a reinforcement structure, and the reinforcement structure is located on a side of the tray body facing away from the tray cavity.

[0026] In some embodiments of the present application, the reinforcement structure includes a plurality of reinforcement parts, and the plurality of reinforcement parts extend in the same direction and are arranged in sequence perpendicular to the extension direction.

[0027] In some embodiments of the present application, in the same reinforcement portion, relative to the two ends of the reinforcement portion along the direction perpendicular to the extension, the middle portion of the reinforcement portion along the direction perpendicular to the extension is concave toward the side close to the accommodating cavity.

[0028] In some embodiments of the present application, a liquid injection port is provided on a side of the bottom plate close to the side beam, and the liquid injection port is connected to the tray cavity. In some embodiments of the present application, a reinforcement structure is provided on a side of the bottom plate away from the tray cavity.

[0029] In a second aspect, an embodiment of the present application provides a battery pack, comprising a battery module and the above-mentioned battery pack tray.

[0030] The battery pack tray is formed with a tray cavity, and the battery module is located in the tray cavity.

[0031] In a third aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery pack.

[0032] In some embodiments of the present application, the electrical equipment includes a vehicle, and the length direction of the vehicle is the same as the extension direction of the multiple reinforcement parts of the battery pack tray of the battery pack.

[0033] The battery pack tray, battery pack and electrical equipment provided in the embodiment of the present application include a tray body and a repair liquid. The tray body has a tray cavity for placing the battery module; a receiving cavity is formed inside the tray body; the repair liquid is located in the receiving cavity; the repair liquid includes a curing material. The battery pack tray provided in the embodiment of the present application provides a receiving cavity inside the tray and fills it with a repair liquid. When the battery pack tray is subjected to an external impact and the tray body is broken, the repair liquid can flow out of the receiving cavity to the damaged area and solidify. The curing material flows to fill the damaged area, realizing a paradigm shift from "passive protection" to "active repair". The battery pack tray has the ability to self-repair after damage, which extends the service life of the battery pack tray and improves the performance of the battery pack tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] Figure 1 A schematic structural diagram of a battery pack tray from a first perspective provided in an embodiment of the present application;

[0036] Figure 2 A schematic structural diagram of a battery pack tray from a second perspective provided in an embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of a battery pack tray from a third perspective provided in an embodiment of the present application;

[0038] Figure 4 for Figure 3 Cross-sectional view in the AA direction;

[0039] Figure 5 An exploded view of a battery pack tray provided in an embodiment of the present application;

[0040] Figure 6 A schematic structural diagram of the tray body of the battery pack tray provided in an embodiment of the present application;

[0041] Figure 7 for Figure 6 Schematic diagram of area B in the middle;

[0042] Figure 8 A schematic diagram of the structure of a battery pack tray provided in an embodiment of the present application after the tray body is damaged;

[0043] Figure 9 for Figure 8 Schematic diagram of region C in the middle.

[0044] Description of reference numerals:

[0045] 100: tray body; 110: tray cavity; 120: liquid filling port;

[0046] 200: bottom plate; 210: receiving chamber;

[0047] 300: Repair fluid;

[0048] 400: solidified material;

[0049] 500: thickening material;

[0050] 600: color developer;

[0051] 700: Strengthen the structure.

[0052] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0054] The battery pack is the core and power source of electric vehicles. Traditional electronic devices like laptops and mobile phones, due to their relatively simple operating conditions, do not place high demands on battery safety. However, electric vehicles face extremely complex operating and road conditions. Flying rocks, foreign objects on the road, and the bottom of the vehicle can all cause impacts and scratches on the battery pack chassis, forcing the battery pack base to withstand significant blunt impact. If the battery pack chassis is scratched by blunt objects during driving, a large amount of foreign matter can enter the battery pack. This can easily cause a short circuit within the battery, generating significant heat, causing battery cell leakage and corrosion of the battery pack tray, threatening the safety and reliability of the electric vehicle.

[0055] In addition to electric vehicles, battery packs can also be used in electric bicycles, electric scooters, portable speakers, and portable generators. During the use of these devices, the battery packs may be scratched by blunt objects, causing a large amount of foreign matter to enter the battery pack, causing a short circuit in the battery and releasing a large amount of heat, affecting the safety of the electrical equipment.

[0056] In related technologies, in order to improve the anti-collision ability of the battery pack tray, the material of the battery pack tray is often selected from high-strength materials such as steel and carbon fiber reinforced materials; in addition, a steel plate or composite material guard plate is installed at the bottom of the battery pack tray.

[0057] However, to improve the battery pack tray's collision resistance, current battery pack trays mostly employ passive protection mechanisms. For example, steel battery pack trays rely on high strength and plastic deformation to absorb impact energy, but once deformed or cracked, they cannot be restored to their original structure. Another example is carbon fiber composite battery pack trays. While they have a high strength-to-weight ratio, they are also highly brittle, and damage can lead to irreversible fiber breakage or matrix cracking.

[0058] Therefore, the existing battery pack tray has the problem of being unable to self-repair after being damaged.

[0059] In view of this, an embodiment of the present application provides a battery pack tray, a battery pack and an electrical device. The battery pack tray includes a tray body and a repair fluid. The tray body has a tray cavity for placing the battery module; a receiving cavity is formed inside the tray body; the repair fluid is located in the receiving cavity; and the repair fluid includes a curing material. The battery pack tray provided in the embodiment of the present application, by providing a receiving cavity inside the tray and filling it with a repair fluid, when the battery pack tray is subjected to an external impact and causes the tray body to rupture, the repair fluid can flow out of the receiving cavity to the damaged area and solidify. The curing material flows to fill the damaged area, realizing a paradigm shift from "passive protection" to "active repair". The battery pack tray has the ability to self-repair after damage, which extends the service life of the battery pack tray and improves the performance of the battery pack tray.

[0060] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0061] First, refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, an embodiment of the present application provides a battery pack tray, comprising:

[0062] The tray body 100 has a tray cavity 110 for placing the battery module; a receiving cavity 210 is formed inside the tray body 100;

[0063] The repairing liquid 300 is located in the accommodating cavity 210 ; the repairing liquid 300 includes a curing material 400 .

[0064] For example, solidified material 400 refers to a material that transforms from a fluid, liquid, or paste-like state to a solid state through a physical or chemical process while maintaining a certain mechanical strength. The solidification process is typically accompanied by changes in molecular structure, such as cross-linking and polymerization, or physical state changes, such as solvent evaporation and cooling.

[0065] When the pallet body 100 is damaged, for example, when a crack or hole is formed in the pallet body 100, the repair fluid 300 can flow from the receiving cavity 210 to the damaged area. The curing material 400 in the repair fluid 300 solidifies in the damaged area, filling the crack or hole, thereby restoring the integrity and strength of the pallet body 100.

[0066] The battery pack tray provided in this embodiment features a cavity 210 filled with a repair fluid 300. When the battery pack tray is subjected to an external impact, causing the tray body 100 to rupture, the repair fluid 300 flows from the cavity 210 to the damaged area and solidifies. The solidified material 400 then flows and fills the damaged area, achieving a paradigm shift from "passive protection" to "active repair," extending the battery pack tray's service life and improving its performance.

[0067] As a feasible embodiment, the tray body 100 includes side beams and a bottom plate 200, the side beams are connected to the bottom plate 200 and the side beams are arranged along the circumference of the bottom plate 200, and the bottom plate 200 and the side beams surround to form a tray cavity 110 for accommodating the battery module.

[0068] The bottom plate 200 forms a receiving chamber 210 .

[0069] For example, the side beams are arranged along the circumference of the base plate 200 and connected to the base plate 200 to form an integral frame structure. This design provides good structural strength and rigidity, effectively protecting the battery module from external impact, vibration, and other physical damage.

[0070] When a battery pack tray is used on a vehicle, the base plate 200 is close to the road surface, and flying rocks, foreign objects on the road, and the bottom of the vehicle can cause impacts and scratches on the base plate 200. By filling the receiving cavity 210 of the base plate 200 with a repair fluid 300, when the base plate 200 is damaged, such as when cracks or perforations occur, the repair fluid 300 can flow from the receiving cavity 210 to the damaged area. The curing material 400 in the repair fluid 300 solidifies in the damaged area, filling the cracks or holes, thereby restoring the integrity and strength of the base plate 200.

[0071] As a feasible implementation method, refer to Figures 6 to 9 As shown, the repair fluid 300 further includes a thickening material 500 .

[0072] For example, the thickening material 500 can adjust the viscosity of the repair liquid 300. Appropriate viscosity helps ensure that the repair liquid 300 can effectively fill cracks or holes and stay in the damaged area long enough to cure. This ensures that when the pallet body 100 is damaged, the repair liquid 300 can flow properly to the damaged area without being too thin to leak or run off.

[0073] At the same time, the thickening material 500 helps the repair fluid 300 form a more stable coating on the damaged area, enhancing the strength of the damaged area after the repair is complete. This improves the adhesion and curing effect of the curing material 400, and enhances the battery tray's ability to withstand secondary impacts and shocks. This helps speed up the repair process, improves repair efficiency, and ensures that the battery tray regains its structural integrity in a short period of time.

[0074] For example, referring to Figure 8 and Figure 9 As shown, when the battery pack tray is scratched by foreign objects and exposed to the outside world, the sealed repair fluid 300 will slowly flow toward the damaged area under the action of gravity, filling the damaged area and isolating the battery pack tray cavity 110 from the outside world, thus maintaining the insulating environment of the tray cavity 110. At the same time, the repair fluid 300 in the damaged area will quickly solidify in the air, thus sealing the damaged area and preventing foreign objects from entering the pack and causing further damage.

[0075] As a feasible implementation, the solidifying material 400 is in liquid state.

[0076] The thickening material 500 is in a granular form.

[0077] For example, the liquid curing material 400 has fluidity and wettability, allowing it to fill micron-sized cracks and achieve precise penetration into damaged areas. When the curing material 400 is in a liquid state, it can quickly flow to the damaged area when the tray body 100 is damaged and begin to solidify upon contact with air, forming a solid repair layer.

[0078] Granular thickening material 500 can be suspended in the repair fluid 300 to provide appropriate viscosity adjustment. These particles can be evenly distributed in the liquid solidifying material 400, helping to control its fluidity. Furthermore, the granular thickening material 500 can form a physical barrier in the damaged area, slowing the flow of the liquid solidifying material 400 and allowing it to remain in the damaged area longer, thereby improving the repair effect. Furthermore, the presence of granular thickening material 500 can increase the filling capacity of the repair fluid 300, allowing it to better adapt to injuries of varying shapes and sizes.

[0079] Furthermore, the granular thickening material 500 can remain stable under different temperature and humidity conditions, helping the repair fluid 300 maintain its performance in various environments.

[0080] For example, when the liquid curing material 400 flows, it will exert a shear force on the entire repair fluid 300, which will cause shear thickening or blocking in rheology. The thickening material 500 will then form a force chain at the damaged area, preventing other rotating liquids from flowing out, thereby better curing and repairing the damaged area.

[0081] As a feasible implementation, the repair liquid 300 is a suspension.

[0082] Exemplarily, when the granular thickening material 500 is distributed in the liquid curing material 400 , the repairing liquid 300 is a suspension.

[0083] In order to improve the uniformity of the repair layer after the damaged area is repaired, the thickening material 500 needs to be evenly distributed in the solidifying material 400. By setting the repairing liquid 300 as a suspension, the solid particles in the suspension can be evenly distributed in the liquid solidifying material 400.

[0084] The repair liquid 300 needs to have the function of flowing or staying. By adjusting the concentration and size of the granular thickening material 500, the fluidity of the suspension can be controlled.

[0085] As a feasible implementation method, refer to Figure 1 、 Figure 3 and Figure 5 As shown, a liquid injection port 120 is provided on one side of the bottom plate 200 close to the side beam, and the liquid injection port 120 is communicated with the tray cavity 110 .

[0086] For example, the repair fluid 300 can be easily injected through the injection port 120, making the maintenance and repair process of the battery pack tray more convenient. By providing the injection port 120 on the bottom plate 200, this design allows for quick replenishment of the repair fluid 300 when needed, adapting to different operating conditions and requirements.

[0087] As a feasible implementation, the curing material 400 includes at least one of silicone glue, cyanoacrylate, epoxy resin, and water-based acrylic acid.

[0088] For example, silicone adhesive has adhesive properties, so that it can adhere to the damaged area to form a repair layer. Silicone adhesive is flexible, weather-resistant, and temperature-resistant, so that it can ensure that the battery pack tray maintains stable performance under extreme temperature conditions.

[0089] Cyanoacrylate is a fast-curing adhesive, curing within seconds to minutes. It offers strong adhesion to a wide variety of materials. Similarly, cyanoacrylate adheres to damaged areas, forming a repair layer.

[0090] Epoxy resins offer mechanical strength, chemical resistance, and adhesion. After curing, they form a hard, solid material that provides excellent structural support. They also adhere to damaged areas, forming a repair layer.

[0091] Water-based acrylic is an environmentally friendly material that offers excellent adhesion and weather resistance. It is easy to clean and apply. This allows water-based acrylic to adhere to damaged areas, creating a repair layer while minimizing environmental impact.

[0092] In some embodiments, the curing material 400 is silicone adhesive.

[0093] In other embodiments, the curable material 400 is cyanoacrylate.

[0094] In some other embodiments, the curing material 400 is epoxy resin.

[0095] In yet other embodiments, the curing material 400 is water-based acrylic.

[0096] In some other embodiments, the curing material 400 includes any two of silicone adhesive, cyanoacrylate, epoxy resin, and water-based acrylic acid. When the curing material 400 includes any two of silicone adhesive, cyanoacrylate, epoxy resin, and water-based acrylic acid, the present embodiment does not limit the mass ratio of the two.

[0097] In some other embodiments, the curing material 400 includes any three of silicone adhesive, cyanoacrylate, epoxy resin, and water-based acrylic acid. When the curing material 400 includes any three of silicone adhesive, cyanoacrylate, epoxy resin, and water-based acrylic acid, the present embodiment does not limit the mass ratio of any three.

[0098] In some other embodiments, the curing material 400 includes silicone glue, cyanoacrylate, epoxy resin, or water-based acrylic.

[0099] As a feasible implementation, the thickening material 500 includes at least one of polymethyl methacrylate, polystyrene, and polycarbonate.

[0100] For example, polymethyl methacrylate (PMMA) has good resistance to UV rays and environmental factors, making it suitable for use outdoors or in harsh environments. PMMA has rigidity and strength, providing an effective thickening effect. Thus, when PMMA is used as thickening material 500, it can improve the stability of the repair layer.

[0101] Polystyrene (PS) is easy to process and form, is a relatively low-cost material, and is suitable for large-scale production. Thus, when polystyrene is used as the thickening material 500, the cost of the repair fluid 300 can be reduced.

[0102] Polycarbonate (PC) is impact-resistant and can maintain integrity under mechanical stress. It also has excellent high-temperature tolerance and dimensional stability. Therefore, when polycarbonate is used as thickening material 500, it can improve the impact resistance and stability of the repair layer.

[0103] In some embodiments, the thickening material 500 is polymethyl methacrylate.

[0104] In other embodiments, the thickening material 500 is polystyrene.

[0105] In yet other embodiments, the thickening material 500 is polycarbonate.

[0106] In some other embodiments, the thickening material 500 includes any two of polymethyl methacrylate, polystyrene, and polycarbonate. When the thickening material 500 includes any two of polymethyl methacrylate, polystyrene, and polycarbonate, the embodiment of the present application does not limit the mass ratio of the two.

[0107] In some embodiments, the curing material 400 is epoxy resin, the thickening material 500 is polystyrene, and the volume ratio of the epoxy resin to the polystyrene is 45:55.

[0108] As a feasible implementation, the volume of the thickening material 500 is A, and the volume of the solidifying material 400 is B, wherein A / (A+B)=C, and C satisfies: 45%≤C≤55%.

[0109] For example, the volume of the thickening material 500 accounts for 45% to 55% of the total volume of the solidifying material 400 and the thickening material 500, which can significantly increase the viscosity of the repair fluid 300. This helps control the fluidity of the repair fluid 300, allowing it to effectively fill and remain in the damaged area when damage occurs.

[0110] Within this ratio range, the thickening material 500 helps maintain the particles in suspension in the liquid, preventing them from settling, thereby ensuring the uniformity of the repair fluid 300 during storage and use. The presence of the thickening material 500 can enhance the filling capacity of the repair fluid 300, allowing it to better adapt to damages of different shapes and sizes, thereby improving the integrity and effectiveness of the repair.

[0111] For example, when the volume fraction of thickening material 500 is between 45% and 55%, shear blockage occurs when the repair fluid 300 encounters the pores. When this occurs, a force chain forms between the granular thickening material 500, preventing further leakage of the liquid curing material 400 due to capillary action until the damaged area is completely cured.

[0112] As a feasible implementation, the density of the solidified material 400 is ρ1, and ρ1 satisfies: 1.0 g / cm 3 ≤ρ1≤1.2g / cm 3 .

[0113] In some embodiments, the density of the thickening material 500 is ρ2, and ρ2 satisfies: 1.0 g / cm 3 ≤ρ2≤1.2g / cm 3 .

[0114] For example, selecting solidifying material 400 and thickening material 500 of similar density helps ensure uniform suspension of thickening particles in liquid solidifying material 400. This reduces the likelihood of particle sedimentation, thereby improving the stability of the suspension.

[0115] When the densities of the solidifying material 400 and the thickening material 500 are close, the buoyancy and gravity of the particles in the liquid tend to balance, reducing the tendency of the particles to settle. This helps maintain the uniformity and stability of the suspension. Density matching helps ensure consistent performance throughout the repair fluid 300 during use. This is crucial for ensuring that the repair fluid 300 can flow evenly and fill the damaged area when damage occurs.

[0116] As a feasible implementation, the size of the thickening material 500 is smaller than the capillary size of the solidifying material 400 .

[0117] For example, capillary action refers to the phenomenon in which liquid spontaneously rises or penetrates in narrow channels or gaps due to surface tension. The fluidity, surface tension, and wettability of the solidified material 400 jointly affect its capillary properties.

[0118] The solidified material 400 can penetrate into the tiny gaps and pores of the material through capillary action. This effect is due to the interaction force between the solidified material 400 and the material surface, such as the adhesion force, being greater than the cohesive force between the molecules of the solidified material 400.

[0119] Capillary size affects the adsorption and absorption capacity of the material. A smaller capillary size usually means a higher specific surface area, thereby enhancing the adsorption capacity of the material.

[0120] The smaller the capillary size, the greater the ability of liquid to penetrate the material, as capillary action is more pronounced in smaller pores. This is very important for liquid transport in self-healing materials.

[0121] The capillary size of the curing material 400 refers to the maximum critical dimension at which the curing material 400 penetrates into gaps or pores in the material through capillary action. The lower the surface tension of the curing material 400, the easier it is to wet the material and penetrate into small pores. The lower the viscosity of the curing material 400, such as water-based adhesives or low-viscosity epoxies, the stronger its capillary penetration ability. The smaller the contact angle between the curing material 400 and the substrate, the more significant the capillary effect.

[0122] When the size of the thickening material 500 is smaller than the capillary size of the solidifying material 400, the particles can more easily penetrate into tiny cracks and pores. This helps to improve the filling capacity of the repair fluid 300, allowing it to more effectively cover and repair the damaged area.

[0123] The smaller particle size of the thickening material 500 helps keep the particles suspended in the liquid, reducing the possibility of sedimentation. This is critical to ensure the uniformity of the suspension during storage and use.

[0124] By controlling the particle size of the thickening material 500 , the rheological properties of the repair fluid 300 can be optimized so that the repair fluid 300 maintains good fluidity and adhesion under different environmental conditions.

[0125] As a feasible implementation, the size of the thickening material 500 is D, and D satisfies: 10 μm≤D≤100 μm.

[0126] For example, particles with a size ranging from 10 μm to 100 μm are generally able to effectively penetrate into tiny cracks and pores in the material, which helps improve the filling capacity of the repair fluid 300, enabling it to more effectively cover and repair the damaged area.

[0127] The appropriate particle size helps to keep the thickening material 500 particles suspended in the liquid and reduces the possibility of sedimentation. This is crucial to ensure the uniformity of the suspension during storage and use.

[0128] For example, when the size of the thickening material 500 is less than 10 μm, the undersized thickening material 500 is prone to flow blockage. When the size of the thickening material 500 is greater than 100 μm, the size of the thickening material 500 is too large and the gravity is too large. The thickening material 500 will be deposited at the bottom of the liquid solidifying material 400 and cannot form a whole with the solidifying material 400. Therefore, in the embodiment of the present application, the size of the thickening material 500 is between 10-100 μm.

[0129] As a feasible implementation, the capillary size of the solidified material 400 is E, and E satisfies: 0.8 mm ≤ E ≤ 1.3 mm.

[0130] For example, the capillary size is in the range of 0.8 mm to 1.3 mm, which means that the solidified material 400 can effectively allow liquid to penetrate into larger pores or cracks. This is crucial to ensure that the repair fluid 300 can fully fill and cover the damaged area.

[0131] The appropriate capillary size can ensure the effective distribution of the repair fluid 300 in the damaged area, improving the integrity and effectiveness of the repair, which helps to achieve more reliable self-repair performance.

[0132] As a feasible implementation manner, the repairing liquid 300 further includes a developer 600 .

[0133] For example, a color developer 600 is provided in the repair fluid 300, and the damaged area can be found by color comparison using the human eye or a magnifying glass, so that maintenance personnel can later detect and identify the damaged point of the bottom tray of the battery pack, thereby further repairing the damaged point.

[0134] The color developing agent 600 includes a chromophore color developing agent 600. The molecule of the color developing agent 600 contains a chromophore such as an azo group or anthraquinone. The color developing agent 600 includes Congo red and methylene blue.

[0135] As a feasible implementation, the color developer 600 includes a fluorescent agent.

[0136] For example, a fluorescent agent is provided in the repair fluid 300, and the damaged area can be found by simply irradiating it with an ultraviolet lamp, so that maintenance personnel can later detect and find out the damaged point of the bottom tray of the battery pack, thereby further maintaining the damaged point.

[0137] Fluorescent agents are substances that absorb ultraviolet light or short-wavelength visible light and emit longer-wavelength visible light.

[0138] Fluorescent agents include coumarins, fluoresceins, and rhodamines.

[0139] Coumarins include 7-hydroxy-4-methylcoumarin and pyranocoumarin.

[0140] Fluoresces include sodium fluorescein and fluorescein isothiocyanate (FITC).

[0141] Rhodamines include Rhodamine B and Rhodamine 6G.

[0142] As a feasible implementation method, refer to Figure 2 As shown, the tray body 100 is provided with a reinforcement structure 700 , and the reinforcement structure 700 is located on a side of the tray body 100 facing away from the tray cavity 110 .

[0143] For example, because a battery pack tray needs to be able to carry heavy loads, the reinforcement structure 700 provided on the tray body 100 can improve the tray's overall strength and rigidity, enhancing its load-bearing capacity. The reinforcement structure 700 helps reduce deformation or bending that may occur during use, thereby maintaining the tray's shape stability and functional integrity.

[0144] As an achievable embodiment, the reinforcement structure 700 includes a plurality of reinforcement parts, which extend in the same direction and are arranged in sequence perpendicular to the extension direction. Figure 2 The direction indicated by Y is perpendicular to the extension direction. Figure 2 The direction indicated by X.

[0145] For example, the design of multiple reinforcements can effectively disperse and carry loads, thereby enhancing the overall strength of the pallet. The reinforcements extending in the same direction provide continuous support, thereby reducing stress concentration.

[0146] The arrangement of the reinforcements helps to increase the rigidity of the pallet and reduce deformation or bending that may occur during use.

[0147] As a feasible implementation, in the same reinforcement portion, relative to the two ends of the reinforcement portion along the direction perpendicular to the extension, the middle portion of the reinforcement portion along the direction perpendicular to the extension is concave toward the side close to the accommodating cavity 210 .

[0148] For example, the concave design can help optimize stress distribution. Under load, this shape can reduce stress concentration and reduce the risk of material fatigue and damage. By concave in the middle, the stability of the structure can be increased, preventing excessive deformation under load. This design helps maintain the balance and shape of the tray. The concave structure can reduce material usage without significantly reducing strength, thereby reducing the overall weight of the tray. In addition, the concave structure does not increase the risk of foreign objects hitting the bottom of the battery pack tray.

[0149] As a feasible implementation, the reinforcement structure 700 is disposed on a side of the bottom plate 200 facing away from the tray cavity 110 .

[0150] For example, since the working conditions on the side of the bottom plate 200 facing away from the tray cavity 110 are more complicated, flying rocks, foreign objects on the road, and bottom support may damage the bottom plate 200. Therefore, the reinforcement structure 700 is set on the side of the bottom plate 200 facing away from the tray cavity 110. The reinforcement structure 700 can effectively improve the impact resistance of the bottom plate 200 and reduce damage caused by flying rocks or foreign objects on the road. When supporting the bottom or in contact with the ground, the reinforcement structure 700 can provide additional protection and reduce the wear of the bottom plate 200. By increasing the structural strength and durability, the reinforcement structure 700 can extend the service life of the pallet as a whole and reduce the frequency of maintenance and replacement. The reinforcement structure 700 not only protects the bottom plate 200 itself, but also indirectly protects the accommodating cavity 210 and the liquid filling port 120 inside the pallet, ensuring that its function is not affected by external damage.

[0151] In a second aspect, an embodiment of the present application provides a battery pack, comprising a battery module and the above-mentioned battery pack tray.

[0152] The battery pack tray is formed with a tray cavity 110 , and the battery module is located in the tray cavity 110 .

[0153] Illustratively, the tray cavity 110 is used to house the battery module. The battery pack tray must possess sufficient strength and rigidity to support and protect the battery module. The battery module is securely placed in the tray cavity 110, ensuring its stability and fixation within the tray. The battery module is electrically connected to an external system, such as the electric vehicle's electrical system, and the electrical module is used to supply power to the external system.

[0154] It is understandable that since the battery pack of the present application adopts the technical solution of the above-mentioned battery pack tray embodiment, it at least has the beneficial effects brought by the technical solution of the above-mentioned battery pack tray embodiment, which will not be described one by one here.

[0155] In a third aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery pack.

[0156] As an achievable embodiment, the electric device includes a vehicle, and the length direction of the vehicle is the same as the extension direction of the multiple reinforcement parts of the battery pack tray of the battery pack. The length direction of the vehicle refers to the direction indicated by X in Figure 2.

[0157] It is understood that the battery pack tray provided in the embodiments of this application can be used not only in vehicles, but also in other electrical devices that may be subject to collisions. Examples include electric vehicles, electric bicycles, electric scooters, portable speakers, and portable generators. The embodiments of this application do not limit the specific type of electrical device.

[0158] For example, the vehicle's length direction refers to the direction from front to back, the primary axial direction of the vehicle, and the direction of travel. The reinforcement extends perpendicular to the vehicle's length direction. The reinforcement significantly increases the impact strength from the direction of travel, preventing foreign matter from entering the battery pack.

[0159] It can be understood that since the electrical equipment of the present application adopts the technical solution of the above-mentioned battery pack embodiment, it at least has the beneficial effects brought by the technical solution of the above-mentioned battery pack embodiment, which will not be described one by one here.

[0160] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A battery pack tray, characterized in that: include: The tray body (100) has a tray cavity (110) for placing the battery module; a receiving cavity (210) is formed inside the tray body (100); A repair liquid (300), the repair liquid (300) is located in the accommodating cavity (210); the repair liquid (300) includes a solidifying material (400).

2. The battery pack tray according to claim 1, wherein: The tray body (100) comprises side beams and a bottom plate (200), the side beams being connected to the bottom plate (200) and arranged along the circumference of the bottom plate (200), and the bottom plate (200) and the side beams surrounding each other to form a tray cavity (110) for accommodating the battery module; The bottom plate (200) forms the accommodating cavity (210).

3. The battery pack tray according to claim 2, characterized in that: The repair fluid (300) further includes a thickening material (500).

4. The battery pack tray according to claim 3, characterized in that: The solidifying material (400) is in liquid form; and the thickening material (500) is in granular form.

5. The battery pack tray according to claim 4, characterized in that: The repairing liquid (300) is a suspension.

6. The battery pack tray according to claim 3, characterized in that: The curing material (400) includes at least one of silicone glue, cyanoacrylate, epoxy resin, and water-based acrylic acid.

7. The battery pack tray according to claim 3, characterized in that: The thickening material (500) includes at least one of polymethyl methacrylate, polystyrene, and polycarbonate.

8. The battery pack tray according to any one of claims 3 to 7, characterized in that: The volume of the thickening material (500) is A, and the volume of the solidifying material (400) is B, wherein A / (A+B)=C, and C satisfies: 45%≤C≤55%.

9. The battery pack tray according to any one of claims 3 to 7, characterized in that: The density of the solidified material (400) is ρ1, and ρ1 satisfies: 1.0 g / cm 3 ≤ρ1≤1.2g / cm 3 ; And / or, the density of the thickening material (500) is ρ2, and the ρ2 satisfies: 1.0 g / cm 3 ≤ρ2≤1.2g / cm 3 .

10. The battery pack tray according to any one of claims 3 to 7, characterized in that: The size of the thickening material (500) is smaller than the capillary size of the solidifying material (400).

11. The battery pack tray according to claim 10, characterized in that: The thickening material (500) has a size D, and D satisfies: 10 μm≤D≤100 μm.

12. The battery pack tray according to claim 11, wherein: The capillary size of the solidified material (400) is E, and E satisfies: 0.8 mm ≤ E ≤ 1.3 mm.

13. The battery pack tray according to any one of claims 3 to 7, characterized in that: The repairing liquid (300) further includes a color developer (600).

14. The battery pack tray according to claim 13, wherein: The color developer (600) includes a fluorescent agent.

15. The battery pack tray according to any one of claims 2 to 7, characterized in that: The tray body (100) is provided with a reinforcement structure (700), and the reinforcement structure (700) is located on a side of the tray body (100) facing away from the tray cavity (110).

16. The battery pack tray according to claim 15, characterized in that: The reinforcement structure (700) comprises a plurality of reinforcement parts, the plurality of reinforcement parts extending in the same direction and arranged in sequence perpendicular to the extension direction.

17. The battery pack tray according to claim 16, wherein: In the same reinforcement portion, relative to the two ends of the reinforcement portion along the direction perpendicular to the extension, the middle portion of the reinforcement portion along the direction perpendicular to the extension is concave toward a side close to the accommodating cavity (210).

18. The battery pack tray according to claim 15, wherein: A liquid injection port (120) is provided on one side of the bottom plate (200) close to the side beam, and the liquid injection port (120) is in communication with the tray cavity (110).

19. The battery pack tray according to claim 18, wherein: The reinforcement structure (700) is arranged on a side of the bottom plate (200) facing away from the tray cavity (110).

20. A battery pack, characterized in that: Comprising a battery module and a battery pack tray according to any one of claims 1 to 19; The battery pack tray is formed with a tray cavity (110), and the battery module is located in the tray cavity (110).

21. An electrical device, characterized in that: Including the battery pack according to claim 20.

22. The electrical equipment according to claim 21, characterized in that: The electrical equipment includes a vehicle, and a length direction of the vehicle is the same as an extension direction of the multiple reinforcement parts of the battery pack tray of the battery pack.

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