Battery case, single battery, battery pack, and electric device

Abstract

The utility model discloses a battery case, single battery, battery package and electric device, battery case includes: shell body, insulating coating, insulating coating is located at the outer surface of shell body, and the area of insulating coating is less than or equal to the area of the outer surface of shell body, insulating edge, and the edge of insulating coating is overlapped with the partial insulating edge and is located at the side of insulating coating away from shell body, and the partial insulating edge is directly pasted on the outer surface of shell body, and is used for fixing the edge of insulating coating on shell body. According to the battery case of the utility model, the adhesion between the edge of insulating coating and shell body can be enhanced, the risk that the edge of insulating coating appears warping and is separated from shell body can be reduced, thereby the problems of shell body corrosion and insulation failure are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery casing, a single battery cell, a battery pack, and an electrical device. Background Technology

[0002] In the battery industry, to prevent electrical short circuits and ensure personal safety, batteries are typically insulated externally. Insulating coatings, with their advantages of reducing materials and simplifying assembly processes, have become the mainstream battery insulation method. However, during the curing process, insulating coatings generate shrinkage stress. Furthermore, due to the difference in expansion coefficients between the substrate and the coating, the rigid coating is subjected to continuous stress under temperature and humidity changes. This can ultimately lead to edge lifting or complete detachment of the coating, resulting in battery corrosion and insulation failure. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery casing that can reduce the risk of edge curling and detachment of the insulating coating from the casing body.

[0004] This utility model also proposes a single battery cell, which includes the battery casing described above; This utility model also proposes a battery pack, which includes the battery casing or the individual battery cells described above.

[0005] This utility model also proposes an electrical device, which includes the above-mentioned single cell battery or the above-mentioned battery pack.

[0006] A battery casing according to an embodiment of the present invention includes: a casing body; an insulating coating, wherein the insulating coating is disposed on the outer surface of the casing body and the area of ​​the insulating coating is less than or equal to the area of ​​the outer surface of the casing body; and an insulating edge, wherein the insulating edge is partially stacked with the edge of the insulating coating and located on the side of the insulating coating away from the casing body, and partially extends beyond the insulating coating and is directly attached to the outer surface of the casing body, for fixing the edge of the insulating coating to the casing body.

[0007] According to the battery casing of this utility model embodiment, by providing an insulating seal on the edge of the insulating coating outside the casing body, the insulating seal is stacked with the edge of the insulating coating and located on the side of the insulating coating away from the casing body, and partly extends beyond the insulating coating and is directly bonded to the casing body, the adhesion between the edge of the insulating coating and the casing body can be enhanced, the risk of edge lifting of the insulating coating and detachment from the casing body can be reduced, thereby improving the problems of casing body corrosion and insulation failure.

[0008] According to some embodiments of the present invention, the outer surface of the shell body has a groove, at least a portion of the edge of the insulating coating is located within the groove, and at least a portion of the insulating seal is located within the groove and directly adheres to the inner wall of the groove.

[0009] In some embodiments of this utility model, the width of the groove is 0.2mm-10mm; and / or, the portion of the insulating coating located within the groove is adhered to the inner surface of the groove, and the insulating seal fills the remaining area within the groove.

[0010] In some embodiments of this utility model, the insulating coating includes: an adhesion layer disposed on the outer surface of the shell body; a protective layer disposed outside the adhesion layer, and the insulating edge sealing covers at least a portion of the edge portion of the protective layer.

[0011] In some embodiments of this utility model, the edge of the attachment layer extends beyond the edge of the protective layer or is flush with the edge of the protective layer; and / or, the width of the insulating seal covering the edge of the protective layer is 0.2mm-1mm; and / or, the attachment layer is polyurethane acrylate; and / or, the protective layer is epoxy resin; and / or, the thickness of the attachment layer is 10μm-50μm.

[0012] In some embodiments of this utility model, the insulating coating further includes an intermediate layer, which is disposed between the adhesion layer and the protective layer.

[0013] In some embodiments of this utility model, the thicknesses of the attachment layer, the intermediate layer, and the protective layer increase sequentially or are equal; and / or, the total thickness of the intermediate layer and the protective layer is 50μm-150μm.

[0014] In some embodiments of this utility model, the insulating coating is disposed around the shell body, the insulating coating has two annular edges located on both sides of the axial direction of the shell body, the insulating sealing edge is two corresponding to the two annular edges, both of the insulating sealing edges are disposed on the outer peripheral surface of the shell body or at least one of the two insulating sealing edges is disposed on the axial end face of the shell body.

[0015] The single-cell battery according to an embodiment of the present invention includes the battery casing described above.

[0016] According to the embodiment of the present invention, the single battery, by setting the battery casing as described above, provides an insulating seal on the edge of the insulating coating outside the casing body. The insulating seal is stacked with the edge of the insulating coating and located on the side of the insulating coating away from the casing body. Part of it extends beyond the insulating coating and is directly attached to the casing body. This can enhance the adhesion between the edge of the insulating coating and the casing body, reduce the risk of the edge of the insulating coating peeling off and detaching from the casing body, thereby improving the problems of casing corrosion and insulation failure.

[0017] The battery pack according to the present invention includes the battery casing or the individual battery described above.

[0018] According to the battery pack of this utility model embodiment, by setting the above-mentioned battery shell or the above-mentioned single battery, an insulating seal is provided on the edge of the insulating coating outside the shell body. The insulating seal is stacked with the edge of the insulating coating and located on the side of the insulating coating away from the shell body. Part of it extends beyond the insulating coating and is directly attached to the shell body. This can enhance the adhesion between the edge of the insulating coating and the shell body, reduce the risk of the edge of the insulating coating peeling off and detaching from the shell body, thereby improving the problems of shell body corrosion and insulation failure.

[0019] The electrical device according to the embodiments of the present invention includes the above-described single battery or the above-described battery pack.

[0020] According to the embodiments of the present invention, the electrical device, by setting the above-mentioned single battery or the above-mentioned battery pack, including the above-mentioned battery casing, provides an insulating seal on the edge of the insulating coating outside the casing body. The insulating seal is stacked with the edge of the insulating coating and located on the side of the insulating coating away from the casing body. Part of it extends beyond the insulating coating and is directly attached to the casing body. This can enhance the adhesion between the edge of the insulating coating and the casing body, reduce the risk of the edge of the insulating coating peeling off and detaching from the casing body, thereby improving the problems of casing body corrosion and insulation failure.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the battery casing of a single battery according to an embodiment of the present utility model; Figure 2 This is a perspective view of the battery casing of a single battery cell according to an embodiment of the present utility model from another angle; Figure 3 This is a front view of the battery casing of a single battery cell according to an embodiment of the present utility model; Figure 4 It is along Figure 3 A cross-sectional view of the CC line; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 yes Figure 4 Enlarged view of point B in the middle; Figure 7 This is a front view of the battery casing body of a single battery according to an embodiment of the present utility model; Figure 8 It is along Figure 7 Sectional view of the DD line; Figure 9 yes Figure 8 Enlarged view at point E in the middle; Figure 10 yes Figure 8 Enlarged view of point F in the middle.

[0023] Figure label: 100. Battery casing; 1. Shell body; 11. Groove; 12. Pole post; 13. Cylinder; 14. Sealing cover plate; 15. Sealing ring; 16. Protrusion; 17. Fixing groove; 2. Insulating coating; 21. Adhesion layer; 22. Protective layer; 3. Insulation sealing. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following is for reference. Figures 1-10 Description of a battery casing 100 according to an embodiment of the present utility model.

[0027] like Figures 1-3 As shown, the battery casing 100 is the casing of a single cell, and the single cell is a cylindrical cell. Of course, this utility model is not limited to this. The single cell can also be a square cell or a cell of other shapes. There are no restrictions here. The battery casing 100 can also be the casing of a battery pack.

[0028] like Figures 3-6 As shown, the battery casing 100 according to an embodiment of the present invention includes a casing body 1, an insulating coating 2, and an insulating edge seal 3.

[0029] Specifically, the casing body 1 can be a metal component. A metal casing body 1 enhances the structural strength of the battery casing 100 and improves its protection of internal components. An insulating coating 2 is applied to the outer surface of the casing body 1. This coating provides insulation between the casing body 1 and other components, ensuring the safety and reliability of the individual battery cells or battery packs using this casing 100. Furthermore, the area of ​​the insulating coating 2 is less than or equal to the area of ​​the outer surface of the casing body 1, thus saving on material costs while maintaining insulation performance. For example, when multiple individual battery casings 100 are arranged in a configuration, it can prevent short circuits caused by contact between two closely spaced battery casings 100, or short circuits caused by contact between a battery casing 100 and the battery pack housing.

[0030] The insulating coating 2 can be formed on the outer surface of the shell body 1 by spraying, dipping, coating, printing or vapor deposition, and the curing method is UV curing.

[0031] The insulating edge seal 3 is partially overlapped with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the shell body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the outer surface of the shell body 1, serving to fix the edge of the insulating coating 2 to the shell body 1. It can be understood that a portion of the insulating edge seal 3 covers the edge of the insulating coating 2 and connects to it, while another portion extends beyond the insulating coating 2 and is directly attached to the shell body 1. In this application, based on the inner surface of the insulating coating 2 being attached to the shell body 1, the insulating edge seal 3 further connects the edge of the insulating coating 2 to the shell body 1, improving the adhesion between the edge of the insulating coating 2 and the shell body 1. This reduces the risk of the edge of the insulating coating 2 peeling off and detaching from the shell body 1, thereby improving the problems of corrosion and insulation failure of the shell body 1.

[0032] During the processing of the battery casing 100, the insulating coating 2 is first attached to the outer surface of the casing body 1 and cured. Then, the insulating edge seal 3 is set on the edge of the insulating coating 2, part of which is stacked with the insulating coating 2 and located on the side of the insulating coating 2 away from the casing body 1, and the other part is directly attached to the casing body 1.

[0033] Among them, insulating edge sealing 3 can be formed by spraying or cold pressing sealing materials.

[0034] According to the battery casing 100 of this utility model embodiment, by providing an insulating seal 3 on the edge of the insulating coating 2 outside the casing body 1, the insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the casing body 1, and partially extends beyond the insulating coating 2 and is directly attached to the casing body 1, the adhesion between the edge of the insulating coating 2 and the casing body 1 can be enhanced, the risk of the edge of the insulating coating 2 peeling off and detaching from the casing body 1 can be reduced, thereby improving the problems of corrosion and insulation failure of the casing body 1.

[0035] In some embodiments of this utility model, such as Figures 4-6 As shown, combined with Figures 7-10 The outer surface of the shell body 1 has a groove 11, and at least part of the edge of the insulating coating 2 is located in the groove 11. It is understood that at least part of the edge of the insulating coating 2 terminates in the groove 11, which can protect the edge of the insulating coating 2 from external mechanical scratches and reduce the problem of the edge of the insulating coating 2 lifting or even detaching from the shell body 1.

[0036] Furthermore, at least a portion of the insulating edge seal 3 is located within the groove 11 and directly adheres to the inner wall of the groove 11. This allows the edge of the insulating coating 2 to be encapsulated within the groove 11 by the insulating edge seal 3, further enhancing the protection of the edge of the insulating coating 2 and reducing the risk of the edge of the insulating coating 2 lifting or even detaching from the shell body 1.

[0037] The groove 11 can be formed by a portion of the shell body 1 recessed into the shell body 1. The groove 11 can be an additionally provided groove 11, or it can be a groove when the battery shell 100 is sealed by a grooving method.

[0038] Optionally, depending on the molding process of the battery casing 100, the cross-sectional shape of the groove 11 along the axial direction can be an arc-shaped groove, a square groove, a U-shaped groove, a T-shaped groove, an L-shaped groove, or other groove structures. For example, in Figure 9 In the example shown, the cross-sectional shape of the groove 11 along the axial direction is similar to that of a circular arc groove. Figure 10 In the example shown, the cross-sectional shape of the groove 11 along the axial direction is similar to that of a U-shaped groove.

[0039] In some embodiments of this utility model, the width of the groove 11 is 0.2mm-10mm, depending on the thickness of the shell body 1 and the spatial layout of the internal structure of the battery shell 100. This satisfies the requirement that at least a portion of the insulating coating 2 and the insulating sealing edge 3 be disposed within the groove 11 to protect the edge of the insulating coating 2, while also improving the structural strength of the battery shell 100 and meeting the layout requirements of other internal structures of the battery shell 100.

[0040] It should be noted that the width of the groove 11 is the width of the opening of the groove 11.

[0041] Optionally, the width of the groove 11 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, or 10mm, etc.

[0042] In some embodiments of this utility model, such as Figures 4-6 As shown, the portion of the insulating coating 2 located within the groove 11 adheres to the inner surface of the groove 11, thereby enhancing the adhesion of the portion of the insulating coating 2 located within the groove 11. This reduces the risk of edge lifting of the insulating coating 2 and detachment from the shell body 1, thus improving the problems of corrosion and insulation failure of the shell body 1.

[0043] Furthermore, the insulating seal 3 fills the remaining area of ​​the groove 11 except for the edge portion of the insulating coating 2. This increases the adhesion area of ​​the insulating seal 3, improves its adhesion, ensures protection of the edge of the insulating coating 2, and prevents electrolyte leakage inside the battery casing 100 or other impurities in the environment from accumulating inside the groove 11 and corroding the insulating seal 3.

[0044] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the insulating coating 2 includes an adhesion layer 21 and a protective layer 22. The adhesion layer 21 can be directly applied to the outer surface of the shell body 1, and the protective layer 22 is applied outside the adhesion layer 21. The insulating edge seal 3 covers at least part of the edge portion of the protective layer 22. The adhesion layer 21 is made of a flexible material with high adhesion and high insulation (e.g., epoxy zinc-rich primer), and the protective layer 22 is made of a weather-resistant material (e.g., acrylic polyurethane topcoat).

[0045] Both the adhesion layer 21 and the protective layer 22 can be formed by spraying, dipping, coating, printing or vapor deposition, and the curing method is UV curing.

[0046] In addition, before spraying the adhesion layer 21, plasma can be used to clean the oil stains on the surface of the shell body 1 to improve the adhesion of the adhesion layer 21 on the surface of the shell body 1. The protective layer 22 can be made using a multi-layer thin spraying process to ensure uniform coating quality and reduce internal stress of the coating.

[0047] In this application, the insulating coating 2 includes an adhesion layer 21 and a protective layer 22, which can improve the adhesion of the insulating coating 2 to the surface of the shell body 1 and improve the insulation effect of the insulating coating 2. The insulating edge seal 3 covers at least part of the edge of the protective layer 22, which can completely cover the edge of the protective layer 22 and the edge of the adhesion layer 21, while protecting the protective layer 22 and the adhesion layer 21, reducing the risk that either the protective layer 22 or the adhesion layer 21 will peel off or detach from the shell body 1.

[0048] Additionally, it should be noted that when a groove 11 is provided on the shell body 1, and at least a portion of the edge of the insulating coating 2 is located within the groove 11, the edges of both the attachment layer 21 and the protective layer 22 must terminate inside the groove 11, that is, the edges of both the protective layer 22 and the attachment layer 21 must be located inside the groove 11.

[0049] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the edge of the adhesion layer 21 extends beyond the edge of the protective layer 22 or is flush with the edge of the protective layer 22. This avoids the edge of the protective layer 22 extending beyond the adhesion layer 21 and being spaced apart from the shell body 1, thus ensuring that the edge of the protective layer 22 is always in contact with the adhesion layer 21, ensuring the adhesion of the edge of the protective layer 22, reducing the risk of the edge of the protective layer 22 lifting, and thus reducing the risk of the edge of the insulating coating 2 lifting.

[0050] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the width of the insulating edge seal 3 covering the edge of the protective layer 22 is 0.2mm-1mm. It can be understood that the overlap between the insulating edge seal 3 and the edge of the protective layer 22 is 0.2mm-1mm. This ensures that the insulating edge seal 3 covers the protective layer 22 sufficiently, guaranteeing effective protection of the edge of the protective layer 22 and reducing the risk of the edge of the protective layer 22 lifting, thereby reducing the risk of the edge of the insulating coating 2 lifting. It also avoids excessive coverage of the protective layer 22 by the insulating edge seal 3, which helps reduce costs and improve production efficiency.

[0051] It should be noted that the width of the insulating edge seal 3 covering the edge of the protective layer 22 refers to the width of the protective layer 22 covered by the insulating edge seal 3 in a direction perpendicular to the extension direction of the edge of the protective layer 22. For example, in Figure 5 and Figure 6 In the example shown, the width of the edge of the insulating seal 3 covering the protective layer 22 is the dimension of the insulating seal 3 covering the protective layer 22 along the extension direction of the protective layer 22 in the cross section.

[0052] Optionally, the width of the edge of the insulating sealing edge 3 covering the protective layer 22 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.

[0053] In some embodiments of this utility model, the adhesion layer 21 is polyurethane acrylate. Polyurethane acrylate (PUA) is a radiation-cured material containing acrylic functional groups and urethane bonds. It combines the high flexibility, abrasion resistance, adhesion, high peel strength, and excellent low-temperature resistance of polyurethane with the excellent optical properties and weather resistance of polyacrylate, which can improve the adhesion of the insulating coating 2 to the surface of the shell body 1.

[0054] In some embodiments of this utility model, the protective layer 22 is epoxy resin. Epoxy resin has the characteristics of strong adhesion, excellent mechanical properties, good chemical resistance, weather resistance, good electrical insulation and dimensional stability, which can improve the insulation effect and service life of the insulating coating 2.

[0055] In some embodiments of this invention, the thickness of the adhesion layer 21 is 10μm-50μm, which can improve the adhesion of the adhesion layer 21 to the surface of the shell body 1 and also improve the insulation effect of the insulating coating 2. For example, the thickness of the adhesion layer 21 can be 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm or 50μm.

[0056] In some embodiments of this invention, the insulating coating 2 may further include an intermediate layer disposed between the adhesion layer 21 and the protective layer 22. The intermediate layer is optional and serves to enhance interlayer adhesion. Furthermore, the material of the intermediate layer may differ from that of the adhesion layer 21 and the protective layer 22. Additionally, the edge of the intermediate layer extends beyond the edge of the protective layer 22 or is flush with the edge of the protective layer 22, and the edge of the adhesion layer 21 extends beyond the edge of the intermediate layer or is flush with the edge of the intermediate layer. This avoids situations where the edge of the protective layer 22 extends beyond the intermediate layer and is spaced apart from the adhesion layer 21, and where the intermediate layer extends beyond the adhesion layer 21 and is spaced apart from the shell body 1, thus ensuring adhesion between the protective layer 22 and the intermediate layer.

[0057] In some embodiments of this invention, the thicknesses of the adhesion layer 21, the intermediate layer, and the protective layer 22 increase sequentially or are equal, with the outer layer being thicker than the inner layer. This enhances the resistance to impact, wear, and environmental corrosion. Having multiple layers of equal thickness simplifies the manufacturing process, ensures uniform stress distribution, and helps reduce costs.

[0058] In some embodiments of this invention, the total thickness of the intermediate layer and the protective layer 22 is 50μm-150μm. This improves the adhesion between the protective layer 22 and the adhesion layer 21, and also enhances the insulation and protective effects of the insulating coating 2. For example, the total thickness of the intermediate layer and the protective layer 22 can be 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, 100μm, 105μm, 110μm, 115μm, 120μm, 125μm, 130μm, 135μm, 140μm, 145μm, or 150μm.

[0059] Additionally, it should be noted that when there is no intermediate layer, the thickness of the protective layer 22 can be 50μm-150μm.

[0060] In some embodiments of this utility model, such as Figures 4-6 As shown, the insulating coating 2 surrounds the shell body 1, and the insulating coating 2 has two annular edges located on both sides of the axial direction of the shell body 1. The insulating sealing edge 3 consists of two corresponding annular edges, and the insulating sealing edge 3 is annular. Further, both insulating sealing edges 3 are provided on the outer peripheral surface of the shell body 1, or at least one of the two insulating sealing edges 3 is provided on the axial end face of the shell body 1.

[0061] It is understood that both insulating edges 3 can be located on the outer peripheral surface of the shell, or one of the two insulating edges 3 can be located on the outer peripheral surface of the shell body 1 and the other on the axial end face of the shell body 1, or the two insulating edges 3 can be located on the two axial end faces of the shell body 1 respectively.

[0062] exist Figures 4-6 In the example shown, one of the two edges of the insulating coating 2 terminates on the end face of one axial end of the shell body 1. One of the corresponding two insulating sealing edges 3 is located on the same end face of one axial end of the shell body 1. A groove 11 recessed into the shell body 1 is provided on this axial end face. One edge of the insulating coating 2 is located within this groove 11, and the insulating sealing edge 3 on the same side fills the groove 11. The other edge of the insulating coating 2 terminates on the outer peripheral surface of the shell body 1. The other insulating sealing edge 3 is located on the outer peripheral surface of the shell body 1. The other axial end of the shell body 1 has a groove formed during sealing. This groove is formed on the outer peripheral surface, and the edge of the insulating coating 2 is located within this groove, as is the other insulating sealing edge 3.

[0063] like Figures 8-10As shown, the shell body 1 includes a cylindrical body 13 and a sealing cover plate 14. One axial end of the cylindrical body 13 is open, and the sealing cover plate 14 covers the open end of the cylindrical body 13. A sealing ring 15 is provided between the sealing cover plate 14 and the cylindrical body 13. The outer peripheral wall of the cylindrical body 13 near the open end has an inwardly recessed groove, and the corresponding inner peripheral wall of the cylindrical body 13 forms a protrusion 16 opposite to the groove. The sealing cover plate 14 is located on the side of the protrusion 16 facing outward from the open end. Furthermore, the open end of the cylindrical body 13 is bent inward and forms a fixing groove 17 with the protrusion 16. The sealing cover plate 14 is located within the fixing groove 17. Additionally, as... Figures 1-4 As shown, the closed end of the cylinder 13 is provided with a pole post 12.

[0064] The following describes a single-cell battery according to an embodiment of the present invention.

[0065] The single-cell battery according to an embodiment of the present invention includes the battery casing 100 described above.

[0066] Among them, the single cell can be a cylindrical cell, a square cell, etc., and the battery casing 100 can be provided with an electrode group, which can be a stacked electrode group or a wound electrode group.

[0067] According to the single battery of this utility model embodiment, by setting the battery casing 100 described above, an insulating seal 3 is provided on the outer side of the casing body 1 and the edge of the insulating coating 2. The insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the casing body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the casing body 1. This can enhance the adhesion between the edge of the insulating coating 2 and the casing body 1, reduce the risk of the edge of the insulating coating 2 peeling off and detaching from the casing body 1, thereby improving the problems of corrosion and insulation failure of the casing body 1.

[0068] The following describes a battery pack according to an embodiment of the present invention.

[0069] The battery pack according to an embodiment of the present invention includes the battery housing 100 described above.

[0070] It is understood that the battery housing 100 serves as the housing of the battery pack, and the battery housing 100 may contain structures such as battery modules.

[0071] According to the battery pack of this utility model embodiment, by setting the battery housing 100 described above, an insulating seal 3 is provided on the edge of the insulating coating 2 outside the housing body 1. The insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the housing body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the housing body 1. This can enhance the adhesion between the edge of the insulating coating 2 and the housing body 1, reduce the risk of the edge of the insulating coating 2 peeling off and detaching from the housing body 1, thereby improving the problems of corrosion and insulation failure of the housing body 1.

[0072] The following describes a battery pack according to another embodiment of the present invention.

[0073] The battery pack according to an embodiment of the present invention includes the aforementioned single battery cell.

[0074] The individual cells are housed inside the battery pack casing, and there can be multiple individual cells.

[0075] According to the battery pack of this utility model embodiment, by setting the above-mentioned single battery, an insulating seal 3 is provided on the edge of the insulating coating 2 outside the shell body 1. The insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the shell body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the shell body 1. This can enhance the adhesion between the edge of the insulating coating 2 and the shell body 1, reduce the risk of the edge of the insulating coating 2 peeling off and detaching from the shell body 1, thereby improving the problems of corrosion and insulation failure of the shell body 1.

[0076] The following describes an electrical device according to an embodiment of the present invention.

[0077] The electrical device according to the present invention includes the above-described single battery, wherein there may be one or more single batteries.

[0078] According to the embodiment of the present utility model, the electrical device, by setting the above-mentioned single battery, including the above-mentioned battery casing 100, provides an insulating seal 3 on the edge of the insulating coating 2 outside the casing body 1. The insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the casing body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the casing body 1. This can enhance the adhesion between the edge of the insulating coating 2 and the casing body 1, reduce the risk of the edge of the insulating coating 2 peeling off and detaching from the casing body 1, thereby improving the problems of corrosion and insulation failure of the casing body 1.

[0079] The following describes an electrical device according to another embodiment of the present invention.

[0080] The electrical device according to an embodiment of the present invention includes the battery pack described above.

[0081] According to the embodiment of the present utility model, the electrical device is provided with the above-mentioned battery pack, including the above-mentioned battery housing 100 or individual battery. An insulating seal 3 is provided on the edge of the insulating coating 2 outside the housing body 1. The insulating seal 3 is partially stacked with the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the housing body 1. Part of it extends beyond the insulating coating 2 and is directly attached to the housing body 1. This can enhance the adhesion between the edge of the insulating coating 2 and the housing body 1, reduce the risk of the edge of the insulating coating 2 peeling off and detaching from the housing body 1, thereby improving the problems of corrosion and insulation failure of the housing body 1.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery casing, characterized in that, include: Shell body (1); An insulating coating (2) is provided on the outer surface of the shell body (1), and the area of ​​the insulating coating (2) is less than or equal to the area of ​​the outer surface of the shell body (1). Insulating edge sealing (3), wherein the insulating edge sealing (3) is partially stacked with the edge of the insulating coating (2) and located on the side of the insulating coating (2) away from the shell body (1), and partially extends beyond the insulating coating (2) and is directly attached to the outer surface of the shell body (1), for fixing the edge of the insulating coating (2) to the shell body (1).

2. The battery casing according to claim 1, characterized in that, The outer surface of the shell body (1) has a groove (11), at least a portion of the edge of the insulating coating (2) is located in the groove (11), and at least a portion of the insulating sealing edge (3) is located in the groove (11) and directly adheres to the inner wall of the groove (11).

3. The battery casing according to claim 2, characterized in that, The width of the groove (11) is 0.2mm-10mm; And / or, the portion of the insulating coating (2) located within the groove (11) is attached to the inner surface of the groove (11), and the insulating seal (3) fills the remaining area within the groove (11).

4. The battery casing according to any one of claims 1-3, characterized in that, The insulating coating (2) comprises: An adhesion layer (21) is provided on the outer surface of the shell body (1); A protective layer (22) is disposed outside the attachment layer (21), and the insulating edge seal (3) covers at least part of the edge portion of the protective layer (22).

5. The battery casing according to claim 4, characterized in that, The edge of the attachment layer (21) extends beyond the edge of the protective layer (22) or is flush with the edge of the protective layer (22); And / or, the width of the insulating seal (3) covering the edge of the protective layer (22) is 0.2mm-1mm; And / or, the adhesion layer (21) is polyurethane acrylate; And / or, the protective layer (22) is epoxy resin; And / or, the thickness of the adhesion layer (21) is 10μm-50μm.

6. The battery casing according to claim 4, characterized in that, The insulating coating (2) further includes: An intermediate layer is disposed between the attachment layer (21) and the protective layer (22).

7. The battery casing according to claim 6, characterized in that, The thicknesses of the attachment layer (21), the intermediate layer, and the protective layer (22) increase sequentially or are equal; And / or, the total thickness of the intermediate layer and the protective layer (22) is 50μm-150μm.

8. The battery casing according to any one of claims 1-3, characterized in that, The insulating coating (2) is disposed around the shell body (1), and the insulating coating (2) has two annular edges located on both sides of the axial direction of the shell body (1). The insulating sealing edge (3) consists of two edges corresponding to the two annular edges. Both insulating edges (3) are provided on the outer peripheral surface of the shell body (1), or at least one of the two insulating edges (3) is provided on the axial end face of the shell body (1).

9. A single-cell battery, characterized in that, Includes the battery casing (100) according to any one of claims 1-8.

10. A battery pack, characterized in that, It includes the battery casing (100) according to any one of claims 1-8 or the single cell according to claim 9.

11. An electrical appliance, characterized in that, This includes the single cell according to claim 9 or the battery pack according to claim 10.

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