Aluminum shell structure and battery

Abstract

The utility model relates to the technical field of aluminum shell insulation structures, and discloses an aluminum shell structure and a battery, and the aluminum shell structure comprises an aluminum shell body, an insulation adsorption layer and an insulation spraying layer. The insulation adsorption layer is located between the inner wall of the aluminum shell body and the insulation spraying layer, and the height of the insulation spraying layer is designed to be higher than that of the insulation adsorption layer, so that a seam between the insulation adsorption layer and the insulation spraying layer can be covered. According to the design, the insulating adsorption layer can be effectively fixed on the aluminum shell body after the insulating spraying layer is cured, so that the insulating protection and the structural integrity of the battery are enhanced. And on the other hand, through composite use of the insulating adsorption layer and the insulating spraying layer, the aluminum shell structure not only provides a stronger insulating effect, but also ensures the physical safety of internal components of the battery, and the battery can have high insulation and high stability by using the aluminum shell structure.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum shell insulation structures, and further to an aluminum shell structure and a battery. Background Art

[0002] In modern battery technology, aluminum-cased batteries are widely used in portable electronic devices, electric vehicles, and energy storage systems due to their lightweight, high energy density, and excellent thermal conductivity. The safety and performance of aluminum-cased batteries depend largely on their internal insulation structure. Traditional aluminum-cased battery insulation is typically achieved through a spray-on process, where liquid insulating material is sprayed onto the interior of the aluminum casing, forming a solid insulating layer that electrically isolates the aluminum casing from the bare battery cell.

[0003] However, the existing aluminum shell structure has several technical defects, which limit the further improvement of battery performance. The liquid insulating material needs to undergo a curing process to be converted into a solid state after spraying. During this process, the material often shrinks in volume, thereby forming microcracks or pores in the insulating layer. These defects will reduce the overall insulation performance of the insulating layer and may even cause local discharge or short circuit. Utility Model Content

[0004] In response to the above technical problems, the purpose of this application is to provide an aluminum shell structure and a battery, which reduces the risk of air holes and insulation failure caused by uneven spraying or curing shrinkage, and effectively improves the uniformity and continuity of the insulation layer.

[0005] In order to achieve the above-mentioned object, the present application provides an aluminum shell structure, comprising: an aluminum shell body, an insulating adsorption layer, and an insulating spray layer;

[0006] The insulating adsorption layer is located between the inner wall of the aluminum shell body and the insulating spray layer;

[0007] The height of the insulating spray layer is higher than that of the insulating adsorption layer, and is used to cover the joint between the insulating adsorption layer and the aluminum shell body, so that the insulating spray layer can fix the insulating adsorption layer to the aluminum shell body.

[0008] In some embodiments, the insulating adsorption layer covers the inner bottom wall of the aluminum shell body and at least a portion of the inner side wall of the aluminum shell body; the insulating spray layer is formed by spraying insulating material, making the insulating material adhere to the insulating adsorption layer and the inner wall of the aluminum shell body and curing.

[0009] In some embodiments, the aluminum shell body has an outline of a cuboid with one side open;

[0010] The insulating adsorption layer includes a bottom support portion, two side wing portions and two main body portions. The bottom support portion is arranged corresponding to the inner bottom wall of the aluminum shell body, each of the side wing portions is arranged corresponding to a narrow surface inside the aluminum shell body, and each of the main body portions is arranged corresponding to a wide surface inside the aluminum shell body.

[0011] In some embodiments, the lengths and widths of the two side wing portions are equal, and the surface area of each side wing portion is smaller than the area of the corresponding narrow surface;

[0012] and / or, the lengths and widths of the two main body portions are equal, and the surface area of each main body portion is smaller than the area of the corresponding wide surface;

[0013] And / or, the surface area of the bottom supporting portion is smaller than the area of the inner bottom wall of the aluminum shell body.

[0014] In some embodiments, the base portion is rectangular, and the two side wing portions and the two main body portions are respectively arranged on different sides of the base portion, so that the overall outline of the insulating adsorption layer is cross-shaped.

[0015] In some embodiments, the thickness of the insulating spray layer is greater than the thickness of the insulating adsorption layer.

[0016] In some embodiments, the inner wall of the aluminum shell body is provided with a step surface, and the height of the insulating spray layer is smaller than the height of the step surface.

[0017] In some embodiments, the insulating spray coating is one of a polypropylamine resin coating, a thermally conductive plastic insulating coating, and a graphene thermally conductive plastic coating.

[0018] In some embodiments, the insulating adsorption layer is an electrostatic adsorption film, and the insulating adsorption layer is pre-fixed to the inner wall of the aluminum shell body by electrostatic adsorption.

[0019] Another aspect of the present application also provides a battery, comprising: a battery cell and the above-mentioned aluminum shell structure, wherein the battery cell is arranged in the aluminum shell structure.

[0020] Compared with the prior art, the aluminum shell structure and battery provided in this application have the following beneficial effects:

[0021] 1. The aluminum shell structure provided in this application has an insulating adsorption layer disposed between the aluminum shell body and the insulating spray coating, thereby forming a composite insulating layer structure, which significantly improves the reliability of the overall insulating structure. The insulating adsorption layer is tightly fitted to the inner wall of the aluminum shell body, thereby ensuring the uniform distribution and adhesion of the subsequent insulating spray coating, and effectively avoiding pores and cracks caused by uneven spraying or curing shrinkage. On the other hand, the insulating spray coating not only provides additional insulation protection, but also reinforces the insulating adsorption layer, improving the mechanical strength of the insulating layer, enabling it to better resist external impacts and internal pressure changes, thereby extending the service life of the battery.

[0022] 2. This application provides an aluminum shell structure in which the insulating adsorption layer utilizes an electrostatic adsorption film, which is pre-fixed to the inner wall of the aluminum shell body by electrostatic adsorption. Utilizing the properties of the electrostatic adsorption film, the insulating adsorption layer can be quickly and conveniently fixed to the inner wall of the aluminum shell body without the need for additional adhesives or mechanical fixation, thereby improving the efficiency and speed of the aluminum shell structure's molding. Furthermore, electrostatic adsorption ensures a perfect fit between the insulating adsorption layer and the inner wall of the aluminum shell body, effectively avoiding unevenness in the inner cavity caused by a loose fit, thereby improving the battery's overall insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application.

[0024] Figure 1 This is a schematic diagram of an explosion structure in one embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] Figure 3 is a partial cross-sectional view of an embodiment of the present application;

[0027] Figure 4 This is a schematic structural diagram of the insulating adsorption layer in one state in one embodiment of the present application;

[0028] Figure 5 It is a schematic structural diagram of the insulating adsorption layer in another state in one embodiment of the present application.

[0029] Description of the accompanying drawings: aluminum shell body 10; step surface 101; insulating adsorption layer 20; bottom support part 201; side wing part 202; main body part 203; insulating spray layer 30. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0031] To simplify the drawings, only the portions relevant to the application are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0032] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In modern battery technology, especially in the design and manufacture of rechargeable batteries like lithium-ion batteries, battery safety, reliability, and performance are crucial considerations. The battery's aluminum casing, as the outer protective structure, must not only provide physical protection against mechanical damage but also ensure electrical insulation between the internal cells and the external environment to prevent short circuits and leakage.

[0037] In traditional aluminum-cased battery designs, insulation between the aluminum casing and the battery cells is typically achieved by spraying insulating materials onto the inner surface of the aluminum casing. This method involves applying an insulating coating, such as epoxy resin, polyurethane, or other polymer materials, using automated spraying equipment to form a uniform insulating layer on the inner surface of the aluminum casing. However, this traditional design has inherent limitations and issues.

[0038] First, achieving uniformity in the spray coating is a challenge due to the limited internal space and irregular shape of the aluminum shell. Uneven spraying can result in varying thicknesses in the insulation layer, reducing insulation performance in certain areas. Furthermore, the sprayed liquid insulation material can shrink during the curing process, leading to the formation of micropores or cracks in the insulation layer. These defects can reduce the overall performance of the insulation layer and increase the risk of battery failure.

[0039] Based on the above situation, the present application provides an aluminum shell structure. The aluminum shell structure in the present application can reduce the risk of air holes and insulation failure caused by uneven spraying or curing shrinkage, thereby improving the safety performance of the battery.

[0040] Reference Manual Figures 1 to 3 The present application provides an aluminum shell structure, comprising an aluminum shell body 10, an insulating adsorption layer 20, and an insulating spray layer 30. The insulating adsorption layer 20 is located between the inner wall of the aluminum shell body 10 and the insulating spray layer 30. The insulating spray layer 30 is higher than the insulating adsorption layer 20 and is used to cover the joint between the insulating adsorption layer 20 and the aluminum shell body 10 and fix the insulating adsorption layer 20 to the aluminum shell body 10.

[0041] In this embodiment, the insulating spray coating 30 secures the insulating adsorption layer 20, enhancing the stability and reliability of the overall insulation structure. The insulating spray coating 30 is higher than the insulating adsorption layer 20, ensuring effective insulation coverage at the joint between the insulating adsorption layer 20 and the aluminum shell body 10, thereby reducing the risk of short circuits caused by insufficient insulation at the joint. Furthermore, the reinforcement provided by the insulating spray coating 30 improves the mechanical stability of the insulating adsorption layer 20, making it more resistant to the various mechanical stresses that may occur during battery assembly and long-term use.

[0042] In addition, in the present application, the aluminum shell body 10, the insulating adsorption layer 20, and the insulating spray layer 30 form a composite aluminum shell structure. By combining the insulating spray layer 30 with the insulating adsorption layer 20, a more uniform and stable insulating layer is provided, which significantly improves the insulation performance of the battery. Compared with the design in the prior art of only spraying an insulating layer on the inner wall of the aluminum shell body 10, the design in the present application is more stable and reliable.

[0043] In one embodiment, the insulating adsorption layer 20 is an electrostatic adsorption film, and the insulating adsorption layer 20 is pre-fixed to the inner wall of the aluminum shell body 10 by electrostatic adsorption to ensure that the insulating adsorption layer 20 is flatly attached to the aluminum shell body 10 .

[0044] The insulating adsorption layer 20 is pre-fixed evenly to the inner wall of the aluminum shell body 10 using the principle of electrostatic adsorption. If the insulating adsorption layer 20 does not adhere evenly to the inner wall of the aluminum shell body 10, the inner wall of the aluminum shell body 10 may become uneven. During the subsequent insulation material spraying process, this will not only affect the placement of the electrolyte or bare cells inside the battery, but may also scratch the bare cells, affecting the performance and safety of the battery.

[0045] After the insulating adsorption layer 20 is evenly pre-fixed to the inner wall of the aluminum shell body 10, the insulating material is sprayed to form the insulating spray layer 30. Because the insulating adsorption layer 20 is already evenly attached to the inner wall of the aluminum shell body 10, the insulating spray layer 30 can also be sprayed evenly on the insulating adsorption layer 20, thereby improving the overall insulation performance of the battery.

[0046] Optionally, for the setting form in this embodiment, before electrostatic adsorption, the operator can pre-treat the inner wall of the aluminum shell body 10, such as cleaning or polishing, to improve the effect of electrostatic adsorption; in addition, for the factory, automated equipment can also be used for electrostatic adsorption and insulation spraying processes to improve production efficiency and quality control.

[0047] Furthermore, the insulating adsorption layer 20 covers the inner bottom wall of the aluminum shell body 10, and also covers at least a portion of the inner bottom wall of the aluminum shell body 10. This layer serves as a basic insulation layer, providing preliminary electrical isolation within the battery. The insulating spray coating 30 is sprayed with an insulating material evenly onto the insulating adsorption layer 20 and the inner wall of the aluminum shell body 10 through a spraying process, and then solidifies to form a second insulating layer.

[0048] By utilizing the close fit between the insulating adsorption layer 20 and the aluminum shell body 10, as well as the uniform coverage of the insulating spray layer 30, comprehensive insulation of the inner wall of the aluminum shell is achieved. The laying of the insulating adsorption layer 20 ensures the pre-insulation of the inner wall of the aluminum shell and provides an ideal base for the subsequent spraying process. The spraying and curing of the insulating spray layer 30 further enhances the insulation effect and ensures electrical isolation between the interior of the battery and the aluminum shell.

[0049] It should be noted that the shape and outline of the aluminum shell body 10 are usually designed according to the model and application requirements of the battery. Common shapes include cylindrical, square or rectangular, etc. Each shape has its own specific application scenarios and advantages. Therefore, in this embodiment, there is no specific limitation on the shape and outline of the aluminum shell body 10. Each shape of the aluminum shell body 10 can be provided with the insulating structure in this application, which plays a role in enhancing the insulation performance and structural stability of the battery, as well as improving the overall safety and production efficiency of the battery.

[0050] In the manufacture of lithium-ion batteries, the design of aluminum-cased batteries must balance safety, space efficiency, and production costs. The aluminum casing body 10 typically adopts a rectangular parallelepiped structure to provide ample space for battery cells and other components while maintaining structural compactness. In one embodiment, based on the above, the aluminum casing body 10 is configured as a rectangular parallelepiped with one side open to facilitate battery assembly and maintenance while ensuring the battery's overall mechanical strength.

[0051] like Figure 4 and Figure 5 As shown, the insulating adsorption layer 20 includes a base portion 201, two side wing portions 202, and two main portions 203 to adapt to the inner shape of the aluminum shell body 10. The base portion 201 is provided corresponding to the inner bottom wall of the aluminum shell body 10, ensuring the insulation of the bottom wall; each side wing portion 202 is provided corresponding to a narrow surface of the inner side of the aluminum shell body 10, and each main portion 203 is provided corresponding to a wide surface of the inner side of the aluminum shell body 10, so that the insulating adsorption layer 20 can closely fit all surfaces inside the aluminum shell body 10.

[0052] Understandably, in traditional aluminum-cased battery manufacturing, installing the insulating layer often requires complex alignment and adjustment steps to ensure the insulating material is properly positioned on the inner wall of the aluminum casing. However, in the design of this embodiment, the base portion 201, side wing portions 202, and main body portion 203 of the insulating adsorption layer 20 correspond one-to-one with the inner bottom wall, narrow side, and wide side of the aluminum casing body 10, significantly simplifying the installation process.

[0053] Specifically, since each part of the insulating adsorption layer 20 corresponds one-to-one to the inner shape of the aluminum shell body 10, the insulating layer can be placed quickly and accurately during production, reducing the time for alignment and adjustment. At the same time, it also reduces possible errors in production, such as misalignment or uneven coverage of the insulating layer, thereby improving the consistency and reliability of the product. Through this precise installation of the insulating layer, the risk of short circuit caused by insufficient insulation is reduced, and the safety performance of the battery is enhanced.

[0054] In one embodiment, the two side wing portions 202 are equal in length and width, and the surface area of each side wing portion 202 is smaller than the area of the corresponding narrow side. The two main body portions 203 are also equal in length and width, and the surface area of each main body portion 203 is smaller than the area of the corresponding wide side. The surface area of the bottom support portion 201 is smaller than the area of the inner bottom wall of the aluminum shell body 10. This design prevents the insulating adsorption layer 20 from overlapping or accumulating at the inner corners of the aluminum shell body 10 during coating, thereby improving the insulation layer's fit and insulation performance.

[0055] Understandably, the uniformity and integrity of the insulating layer are crucial during the aluminum shell manufacturing process. If the insulating adsorption layer 20 overlaps or accumulates at corners during lamination, it can result in locally excessive thickness or gaps in the insulating layer. These defects can pose a risk of battery short circuits and performance degradation. By precisely designing the size and shape of each component of the insulating adsorption layer 20, this embodiment effectively avoids these issues, ensuring the uniformity and integrity of the insulating layer.

[0056] On the other hand, since the installation of the insulation layer no longer requires additional cutting or adjustment, the production efficiency of the aluminum shell structure is improved, while reducing material waste and production costs.

[0057] However, the design of this embodiment also allows for a certain degree of flexibility to accommodate specific production requirements or battery designs. For example, the length and width limits of the wing portions 202, main body portion 203, and base portion 201 can be independently adjusted to accommodate aluminum housings 10 of varying sizes or specific insulation requirements. This flexibility allows manufacturers to optimize the dimensions of the insulating adsorption layer 20 based on specific application scenarios to achieve optimal insulation and production efficiency.

[0058] In one embodiment, Figure 5 As shown, based on the above embodiment, the aluminum shell body 10 is a cuboid with an opening on one side, and the shape outline of the bottom support portion 201 is correspondingly a rectangle, ensuring that the bottom support portion 201 can cover the inner bottom wall of the aluminum shell and provide a stable insulation layer for the bottom of the battery.

[0059] The two side wings 202 and the two main bodies 203 are respectively arranged on different sides of the base 201, so that the overall outline of the insulating adsorption layer 20 is cross-shaped, so that the side wings 202 extend along the narrow side of the aluminum shell body 10, while the main body 203 extends along the wide side, which helps to achieve comprehensive and uniform insulation coverage of the inner wall of the aluminum shell. During the production process of the aluminum shell structure, the insulating adsorption layer 20 can be arranged as a whole inside the aluminum shell body 10, and then adsorbed and fixed, which reduces the assembly steps and potential errors, and is conducive to improving production efficiency. At the same time, since the various parts of the insulating adsorption layer 20 can accurately match the inner shape of the aluminum shell body 10, material waste in the production process can also be minimized.

[0060] In addition, based on the above embodiments, please refer to the attached Figure 3 The thickness of the insulating spray layer 30 is greater than that of the insulating adsorption layer 20, which can establish a more reliable insulation barrier between the aluminum shell body 10 and the battery cell. In this embodiment, the thickened design of the insulating spray layer 30 provides additional safety.

[0061] First, the thicker insulating spray coating 30 enhances overall insulation performance. Even if the insulating adsorption layer 20 develops minor defects due to manufacturing tolerances, mechanical stress, or wear and tear during long-term operation, the insulating spray coating 30 can still maintain the necessary insulation strength to prevent electrical short circuits. Second, the thicker insulating spray coating 30 also provides additional mechanical protection for the battery, better resisting external impact and wear, thereby extending the battery's service life.

[0062] Compared to the insulating spray coating 30, the insulating adsorption layer 20 is thinner. This thinner insulating adsorption layer 20 is more likely to adhere tightly to the inner surface of the aluminum shell body 10. This is because the thinner layer of material can better adapt to the microstructure of the aluminum shell body 10 surface during physical adsorption. This helps avoid material overlap and accumulation during the coating process, ensuring the uniformity of the insulating layer, thereby improving the adsorption effect and electrical insulation performance. Furthermore, the thinner insulating adsorption layer 20 can reduce the overall material usage, reducing the volume of the insulating layer within the battery, and making the battery structure more compact.

[0063] It should be noted that, in actual production, the thickness of the insulating adsorption layer 20 can be fine-tuned according to the specific shape and size of the aluminum shell body 10 to achieve the best insulation effect and mechanical stability.

[0064] Furthermore, Figure 3 As shown, the inner wall of the aluminum shell body 10 is provided with a step surface 101. In some cases, the step surface 101 is tightly matched with the top cover to ensure that the top cover can stably close the opening portion of the aluminum shell.

[0065] Specifically, the stepped surface 101 forms a good sealing contact with the top cover, while providing sufficient mechanical support between the top cover and the aluminum shell. This structural design not only improves the overall mechanical stability of the battery, but also helps improve the battery's sealing performance, preventing electrolyte leakage and external environmental factors from affecting battery performance.

[0066] Furthermore, the design of stepped surface 101 simplifies the battery assembly process. On an automated production line, the top cover can be precisely positioned on the stepped surface 101 of the aluminum shell, enabling a quick and reliable connection through laser welding or other sealing technologies. This helps improve production efficiency, reduce human error, and ensure consistent quality across each battery batch.

[0067] Based on the above content and embodiments, the height of the insulating spray layer 30 is less than the height of the step surface 101, which means that the insulating spray layer 30 will not extend to the upper area of the step surface 101, ensuring that when the top cover is installed, the top cover can be smoothly placed on the step surface 101, and no assembly interference will occur due to the presence of the insulating spray layer 30, thereby ensuring the sealing and structural stability between the top cover and the aluminum shell body 10.

[0068] In one embodiment, the insulating spray coating 30 can be selected from one of a polypropylamine resin coating, a thermally conductive plastic insulating coating, or a graphene thermally conductive plastic coating, all of which have their own advantages.

[0069] First, polypropylamine resin coatings typically have excellent insulation properties and chemical stability, maintaining their performance under a variety of environmental conditions and being suitable for applications requiring high insulation strength. Thermally conductive plastic insulating coatings combine excellent insulation and thermal conductivity, helping to disperse heat within the battery, thereby improving the battery's thermal management efficiency. Graphene thermally conductive plastic coatings have excellent thermal conductivity and electrical insulation properties, providing an efficient heat conduction path while maintaining electrical isolation between battery components. In summary, by selecting the material for insulating spray coating 30, the aluminum shell structure in this embodiment not only provides reliable insulation protection but also optimizes the battery's thermal management, thereby improving battery performance and service life, enhancing the battery's overall competitiveness.

[0070] In one embodiment, according to another aspect of the present application, the present application further provides a battery, including a battery cell and the above-mentioned aluminum shell structure.

[0071] The corresponding drawings are not shown here, but it can be understood that the battery cell is arranged in the aluminum shell structure and forms a close fit with the aluminum shell structure. Through the relevant design of the above-mentioned aluminum shell structure, not only the battery cell is protected from external physical damage, but also the electrical safety of the battery is ensured through the design of its composite insulating layer, the electrical insulation inside the battery is ensured, the occurrence of short circuit and leakage is prevented, and the service life of the battery is extended.

[0072] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present application. It should be noted that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications should also be considered as the scope of protection of the present application.

Claims

1. An aluminum shell structure, characterized in that: include: Aluminum shell body, insulating adsorption layer, insulating spray layer; The insulating adsorption layer is located between the inner wall of the aluminum shell body and the insulating spray layer; The height of the insulating spray layer is higher than that of the insulating adsorption layer, and is used to cover the joint between the insulating adsorption layer and the aluminum shell body, so that the insulating spray layer can fix the insulating adsorption layer to the aluminum shell body.

2. The aluminum shell structure according to claim 1, characterized in that: The insulating adsorption layer covers the inner bottom wall of the aluminum shell body and at least part of the inner side wall of the aluminum shell body; the insulating spray layer is formed by spraying insulating material, making the insulating material adhere to the insulating adsorption layer and the inner wall of the aluminum shell body and solidifying.

3. The aluminum shell structure according to claim 2, characterized in that: The outline of the aluminum shell body is a cuboid with an opening on one side; The insulating adsorption layer includes a bottom support portion, two side wing portions and two main body portions. The bottom support portion is arranged corresponding to the inner bottom wall of the aluminum shell body, each of the side wing portions is arranged corresponding to a narrow surface inside the aluminum shell body, and each of the main body portions is arranged corresponding to a wide surface inside the aluminum shell body.

4. The aluminum shell structure according to claim 3, characterized in that: The lengths and widths of the two side wing portions are equal, and the surface area of each side wing portion is smaller than the area of the corresponding narrow surface; and / or, The length and width of the two main body parts are equal, and the surface area of each main body part is smaller than the area of the corresponding wide surface; and / or, The surface area of the bottom supporting portion is smaller than the area of the inner bottom wall of the aluminum shell body.

5. The aluminum shell structure according to claim 4, characterized in that: The bottom support portion is rectangular, and the two side wing portions and the two main body portions are respectively arranged on different sides of the bottom support portion, so that the overall outline of the insulating adsorption layer is cross-shaped.

6. The aluminum shell structure according to claim 1, characterized in that: The thickness of the insulating spray layer is greater than the thickness of the insulating adsorption layer.

7. The aluminum shell structure according to claim 1, characterized in that: The inner wall of the aluminum shell body is provided with a step surface, and the height of the insulating spray layer is smaller than the height of the step surface.

8. The aluminum shell structure according to claim 1, characterized in that: The insulating spray coating is one of a polypropylamine resin coating, a thermally conductive plastic insulating coating, and a graphene thermally conductive plastic coating.

9. The aluminum shell structure according to any one of claims 1 to 8, characterized in that: The insulating adsorption layer is an electrostatic adsorption film, and the insulating adsorption layer is pre-fixed on the inner wall of the aluminum shell body by electrostatic adsorption.

10. A battery, characterized in that: include: battery cells; The aluminum shell structure according to any one of claims 1 to 9, wherein the battery core is arranged in the aluminum shell structure.

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