Battery shell, single battery, battery pack and power utilization device

Abstract

The invention discloses a battery shell, a single battery, a battery pack and a power utilization device. The battery shell comprises a shell body and a battery cover, the insulating coating is arranged on the outer surface of the shell body; and the insulation sealing edge is partially laminated with the edge of the insulation coating and is positioned on one side, deviating from the shell body, of the insulation coating, and the insulation sealing edge partially exceeds the insulation coating, is directly attached to the outer surface of the shell body and is used for fixing the edge of the insulation coating to the shell body. According to the battery shell disclosed by the invention, the insulating sealing edge is arranged outside the shell body and at the edge part of the insulating coating, the insulating sealing edge part and the edge of the insulating coating are laminated and positioned on one side, deviating from the shell body, of the insulating coating, and the insulating sealing edge part exceeds the insulating coating and is directly attached and connected with the shell body; the adhesive force between the edge of the insulating coating and the shell body can be enhanced, and the risk that the edge of the insulating coating warps and is separated from the shell body can be reduced, so that the problems of corrosion and insulation failure of the shell body are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery shell, a single battery, a battery pack and a power device. BACKGROUND

[0002] In the related art, in the battery industry, in order to prevent electrical short circuit and protect personal safety, the battery is generally insulated on the outside, and the insulation coating has the characteristics of reducing materials and simplifying assembly process, and becomes the mainstream battery insulation method. However, the insulation coating will produce shrinkage stress in the curing process, and due to the difference in expansion coefficient between the substrate and the coating, the coating with strong rigidity will be continuously stressed when the temperature and humidity change, which will eventually cause the coating to be warped or directly debonded, thereby causing battery corrosion and insulation failure. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery shell which can reduce the risk of warping and separation of the edge of the insulation coating from the shell body.

[0004] The present application also provides a single battery comprising the above-mentioned battery shell. The present application also provides a battery pack comprising the above-mentioned battery shell or the above-mentioned single battery.

[0005] The present application also provides a power device comprising the above-mentioned single battery or the above-mentioned battery pack.

[0006] The battery shell according to the embodiments of the present application comprises a shell body, an insulation coating provided on the outer surface of the shell body, and an insulation sealing edge partially laminated with the edge of the insulation coating and located on the side of the insulation coating away from the shell body, partially exceeding the insulation coating and directly attached to the outer surface of the shell body, for fixing the edge of the insulation coating to the shell body.

[0007] The battery shell according to the embodiments of the present application, by providing an insulation sealing edge on the edge of the insulation coating outside the shell body, the insulation sealing edge is partially laminated with the edge of the insulation coating and located on the side of the insulation coating away from the shell body, and partially exceeds the insulation coating and is directly attached to the shell body, can enhance the adhesion between the edge of the insulation coating and the shell body, reduce the risk of warping and separation of the edge of the insulation coating from the shell body, and improve the problems of corrosion and insulation failure of the shell body.

[0008] According to some embodiments of the present application, the outer surface of the shell body has a groove, at least part of the edge of the insulating coating is located in the groove, and at least part of the insulating sealing edge is located in the groove and directly abuts the inner wall of the groove.

[0009] In some embodiments of the present application, the width of the groove is 0.2mm-10mm; and / or, the part of the insulating coating located in the groove abuts the inner surface of the groove, and the insulating sealing edge fills the remaining area in the groove.

[0010] In some embodiments of the present application, the insulating coating comprises: an adhesion layer provided on the outer surface of the shell body; a protective layer provided outside the adhesion layer, and the insulating sealing edge covers at least part of the edge of the protective layer.

[0011] In some embodiments of the present application, the edge of the adhesion layer is beyond or flush with the edge of the protective layer; and / or, the width of the edge of the protective layer covered by the insulating sealing edge is 0.2mm-1mm; and / or, the adhesion layer is polyurethane acrylate; and / or, the protective layer is epoxy resin; and / or, the thickness of the adhesion layer is 10μm-50μm.

[0012] In some embodiments of the present application, the insulating coating further comprises: an intermediate layer provided between the adhesion layer and the protective layer.

[0013] In some embodiments of the present application, the thickness of the adhesion layer, the intermediate layer and the protective layer increases in turn or is equal; and / or, the total thickness of the intermediate layer and the protective layer is 50μm-150μm.

[0014] In some embodiments of the present application, the insulating coating is arranged around the shell body, the insulating coating has two annular edges located on the axial two sides of the shell body, the insulating sealing edge is two corresponding to the two annular edges, and both of the two insulating sealing edges are provided on the outer circumferential surface of the shell body or at least one of the two insulating sealing edges is provided on the axial end surface of the shell body.

[0015] The single battery according to the embodiments of the present application comprises the battery shell as described above.

[0016] According to the battery shell of the embodiment of the present application, the insulating edge is arranged at the edge of the insulating coating outside the shell body, the insulating edge is arranged in a laminated manner with the edge of the insulating coating and located at the side of the insulating coating away from the shell body, and the insulating edge is directly connected with the shell body beyond the insulating coating, so that the adhesion between the edge of the insulating coating and the shell body is enhanced, the risk of edge lifting of the insulating coating and separation from the shell body is reduced, and the problems of corrosion of the shell body and insulation failure are improved.

[0017] According to the battery pack of the embodiment of the present application, the insulating edge is arranged at the edge of the insulating coating outside the shell body, the insulating edge is arranged in a laminated manner with the edge of the insulating coating and located at the side of the insulating coating away from the shell body, and the insulating edge is directly connected with the shell body beyond the insulating coating, so that the adhesion between the edge of the insulating coating and the shell body is enhanced, the risk of edge lifting of the insulating coating and separation from the shell body is reduced, and the problems of corrosion of the shell body and insulation failure are improved.

[0018] According to the battery pack of the embodiment of the present application, the insulating edge is arranged at the edge of the insulating coating outside the shell body, the insulating edge is arranged in a laminated manner with the edge of the insulating coating and located at the side of the insulating coating away from the shell body, and the insulating edge is directly connected with the shell body beyond the insulating coating, so that the adhesion between the edge of the insulating coating and the shell body is enhanced, the risk of edge lifting of the insulating coating and separation from the shell body is reduced, and the problems of corrosion of the shell body and insulation failure are improved.

[0019] According to the electric device of the embodiment of the present application, the insulating edge is arranged at the edge of the insulating coating outside the shell body, the insulating edge is arranged in a laminated manner with the edge of the insulating coating and located at the side of the insulating coating away from the shell body, and the insulating edge is directly connected with the shell body beyond the insulating coating, so that the adhesion between the edge of the insulating coating and the shell body is enhanced, the risk of edge lifting of the insulating coating and separation from the shell body is reduced, and the problems of corrosion of the shell body and insulation failure are improved.

[0020] According to the electric device of the embodiment of the present application, the insulating edge is arranged at the edge of the insulating coating outside the shell body, the insulating edge is arranged in a laminated manner with the edge of the insulating coating and located at the side of the insulating coating away from the shell body, and the insulating edge is directly connected with the shell body beyond the insulating coating, so that the adhesion between the edge of the insulating coating and the shell body is enhanced, the risk of edge lifting of the insulating coating and separation from the shell body is reduced, and the problems of corrosion of the shell body and insulation failure are improved.

[0021] Additional aspects and advantages of the present application will be made apparent by the following description of embodiments of the present application, given as a non-restrictive example with reference to the attached drawings wherein: BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which: Figure 1 is a perspective view of a battery shell of a single battery according to an embodiment of the present application; Figure 2 is a perspective view of another angle of a battery shell of a single battery according to an embodiment of the present application; Figure 3is a front view of a battery case of a single battery according to an embodiment of the present application; Figure 4 is a sectional view along Figure 3 line C-C in FIG. 1; Figure 5 is a sectional view along Figure 4 line A in FIG. 1; Figure 6 is a sectional view along Figure 4 line B in FIG. 1; Figure 7 is a front view of a case body of a battery case of a single battery according to an embodiment of the present application; Figure 8 is a sectional view along Figure 7 line D-D in FIG. 2; Figure 9 is a sectional view along Figure 8 line E in FIG. 2; Figure 10 is a sectional view along Figure 8 line F in FIG. 2.

[0023] Reference numerals: 100: battery case 1: case body; 11: recess; 12: pole; 13: cylinder; 14: sealing cover plate; 15: sealing ring; 16: protrusion; 17: fixing groove 2: insulating coating; 21: adhesion layer; 22: protection layer 3: insulating edge DETAILED DESCRIPTION

[0024] Embodiments of the present application are described in detail below with reference to the attached drawings, which are given as examples only and thus are not limitative of the present application, and wherein the same or similar components are denoted by the same or similar reference numerals throughout several figures. Embodiments described below are exemplary and are set forth merely to explain the present application and should not be construed to limit the present application.

[0025] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In the description of the present application, it needs to be understood that the terms "mounting", "connecting", "connection" should be understood in a broad sense unless otherwise explicitly specified and limited, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Reference will now be made to the drawings Figures 1-10 The battery shell 100 according to the embodiment of the present application is described.

[0027] As shown in Figures 1-3 The battery shell 100 is a battery shell of a single battery, and the single battery is a cylindrical battery. Of course, the present application is not limited thereto, and the single battery can also be a square battery or other shaped battery, which is not limited herein, and the battery shell 100 can also be a shell of a battery pack.

[0028] As shown in Figures 3-6 The battery shell 100 according to the embodiment of the present application includes a shell body 1, an insulating coating 2 and an insulating edge 3.

[0029] Specifically, the shell body 1 can be a metal piece, and the metal shell body 1 can enhance the structural strength of the battery shell 100 and improve the protection capability of the battery shell 100 to the internal components. The insulating coating 2 is arranged on the outer surface of the shell body 1, and the insulating coating 2 can realize the insulation between the shell body 1 and other components, so as to ensure the safety and reliability of the single battery or the battery pack using the battery shell 100. For example, when a plurality of battery shells 100 of single batteries are arranged, the contact between two battery shells 100 close to each other can be avoided to cause short circuit, or the contact between the battery shell 100 and the box of the battery pack can be avoided to cause short circuit.

[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 is cured by UV light.

[0031] The insulating edge 3 is arranged on 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, so as to fix the edge of the insulating coating 2 to the shell body 1. It can be understood that part of the insulating edge 3 covers the edge of the insulating coating 2 and is connected to the insulating coating 2, and the other part extends beyond the insulating coating 2 and is directly attached to the shell body 1. In this application, on the basis of the attachment of the inner surface of the insulating coating 2 to the shell body 1, the insulating edge 3 further connects the edge of the insulating coating 2 to the shell body 1, thereby improving the adhesion between the edge of the insulating coating 2 and the shell body 1, reducing the risk of edge lifting of the insulating coating 2 and separation from the shell body 1, and thus improving the corrosion and insulation failure of the shell body 1.

[0032] In the process of processing the battery shell 100, the insulating coating 2 is first attached to the outer surface of the shell body 1 and cured, and then the insulating edge 3 is arranged on the edge of the insulating coating 2, part of which is arranged on the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the shell body 1, and the other part is directly attached to the shell body 1.

[0033] The insulating edge 3 can be formed by spraying or cold pressing a sealing material.

[0034] According to the battery shell 100 of the embodiment of the application, the insulating edge 3 is arranged on the edge of the insulating coating 2 outside the shell body 1, part of which is arranged on the edge of the insulating coating 2 and located on the side of the insulating coating 2 away from the shell body 1, and the other part extends beyond the insulating coating 2 and is directly attached to the shell body 1, thereby enhancing the adhesion between the edge of the insulating coating 2 and the shell body 1, reducing the risk of edge lifting of the insulating coating 2 and separation from the shell body 1, and thus improving the corrosion and insulation failure of the shell body 1.

[0035] In some embodiments of the application, as shown in Figures 4-6 , in combination 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 can be understood that at least part of the edge of the insulating coating 2 ends inside the groove 11, so that the edge of the insulating coating 2 is protected and is not easily scratched by external mechanical forces, thereby reducing the risk of edge lifting of the insulating coating 2 and separation from the shell body 1.

[0036] In addition, at least part of the insulation edge 3 is located in the groove 11 and directly adheres to the inner wall of the groove 11. In this way, the edge of the insulation coating 2 can be encapsulated inside the groove 11 by the insulation edge 3, further improving the protection of the edge of the insulation coating 2, and reducing the problem of the edge of the insulation coating 2 being warped or even separated from the shell body 1.

[0037] The groove 11 can be formed by the part of the shell body 1 being recessed towards the inside of the shell body 1, the groove 11 can be an additionally arranged groove 11, or the groove 11 can be a rolling groove when the battery shell 100 is sealed in a rolling groove manner.

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

[0039] In some embodiments of the present application, according to the thickness of the shell body 1 and the spatial layout of the internal structure of the battery shell 100, the width of the groove 11 is 0.2mm-10mm. In this way, the edge of the insulation coating 2 and at least part of the insulation edge 3 can be arranged in the groove 11 to protect the edge of the insulation coating 2, and the structural strength of the battery shell 100 can be improved and the layout requirements of other structures inside the battery shell 100 can be met.

[0040] It should be noted that the width of the groove 11 is the width at 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 the present application, as shown in Figures 4-6 the part of the insulation coating 2 located in the groove 11 adheres to the inner surface of the groove 11, thereby enhancing the adhesion of the part of the insulation coating 2 located in the groove 11, reducing the risk of the edge of the insulation coating 2 being warped and separated from the shell body 1, and improving the problem of corrosion of the shell body 1 and insulation failure.

[0043] Further, the insulating edge 3 fills the rest of the groove 11 except the edge part of the insulating coating 2. In this way, the adhesion area of the insulating edge 3 can be increased, the adhesion of the insulating edge 3 can be improved, the protection effect on the edge of the insulating coating 2 can be ensured, and the internal electrolyte of the battery shell 100 or other impurities in the environment can be prevented from leaking into the groove 11 to corrode the insulating edge 3.

[0044] In some embodiments of the present application, as shown in Figure 5 and Figure 6 The insulating coating 2 includes an adhesion layer 21 and a protective layer 22. The adhesion layer 21 can be directly arranged on the outer surface of the shell body 1, and the protective layer 22 is arranged outside the adhesion layer 21. The insulating edge 3 covers at least part of the edge of the protective layer 22. The adhesion layer 21 is made of a flexible material with high adhesion and high insulation (for example, epoxy zinc-rich primer), and the protective layer 22 is made of a material resistant to weather (for example, acrylic polyurethane topcoat).

[0045] The adhesion layer 21 and the protective layer 22 can be formed by spraying, dipping, coating, printing or vapor deposition, and cured by UV light.

[0046] In addition, before spraying the adhesion layer 21, the surface of the shell body 1 can be cleaned by plasma to improve the adhesion of the adhesion layer 21 on the surface of the shell body 1. The protective layer 22 can be sprayed in multiple thin layers to ensure uniform coating quality and reduce internal stress of the coating.

[0047] In the present application, the insulating coating 2 includes the adhesion layer 21 and the protective layer 22, which can improve the adhesion of the insulating coating 2 on the surface of the shell body 1, and can improve the insulation effect of the insulating coating 2. The insulating edge 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, and protect the protective layer 22 and the adhesion layer 21, thereby reducing the risk of edge lifting or separation of any one of the protective layer 22 and the adhesion layer 21 from the shell body 1.

[0048] In addition, it should be noted that when the groove 11 is arranged on the shell body 1 and at least part of the edge of the insulating coating 2 is located in the groove 11, the edges of the adhesion layer 21 and the protective layer 22 should end in the groove 11, that is, the edge of the protective layer 22 and the edge of the adhesion layer 21 should be located in the groove 11.

[0049] In some embodiments of the present application, as shown in Figure 5 and Figure 6As shown, the edge of the adhesion layer 21 is beyond or flush with the edge of the protective layer 22. In this way, the edge of the protective layer 22 can be prevented from being beyond the adhesion layer 21 and spaced apart from the shell body 1, so that the edge of the protective layer 22 is always attached to the adhesion layer 21, the adhesion of the edge of the protective layer 22 is ensured, and the risk of the edge of the protective layer 22 being warped is reduced, thereby reducing the risk of the edge of the insulating coating 2 being warped.

[0050] In some embodiments of the present application, as shown in Figure 5 and Figure 6 As shown, the width of the insulating edge 3 covering the edge of the protective layer 22 is 0.2mm-1mm. It can be understood that the width of the insulating edge 3 overlapping the edge of the protective layer 22 is 0.2mm-1mm. In this way, the width of the insulating edge 3 covering the protective layer 22 can be ensured to be sufficient, the protection effect of the edge of the protective layer 22 is ensured, the risk of the edge of the protective layer 22 being warped is reduced, thereby reducing the risk of the edge of the insulating coating 2 being warped, and the insulating edge 3 covering the protective layer 22 too much can be avoided, which is conducive to reducing costs and improving production efficiency.

[0051] It should be noted that the width of the insulating edge 3 covering the edge of the protective layer 22 refers to the width of the protective layer 22 covered by the insulating edge 3 in the direction perpendicular to the extension direction of the edge of the protective layer 22. For example, in the example shown in Figure 5 and Figure 6 As shown, the width of the insulating edge 3 covering the edge of the protective layer 22 is the size of the insulating edge 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 insulating edge 3 covering the edge of 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 the present application, the adhesion layer 21 is polyurethane acrylate. Polyurethane acrylate (PUA) is a radiation-curable material containing acrylic functional groups and urethane bonds, which has high flexibility, wear resistance, adhesion, high peel strength, excellent low-temperature resistance of polyurethane, and excellent optical performance and weather resistance of polyacrylate. The adhesion of the insulating coating 2 to the surface of the shell body 1 can be improved.

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

[0055] In some embodiments of the present 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 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 the present 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 is used to enhance interlayer adhesion. Furthermore, the material of the intermediate layer may be different 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 the present 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, abrasion, 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 the present invention, the total thickness of the intermediate layer and the protective layer 22 is 50 μm-150 μm. 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 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm, 120 μm, 125 μm, 130 μm, 135 μm, 140 μm, 145 μm, or 150 μm.

[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 the present invention, 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 can be understood that the two insulation edges 3 can be located on the outer circumferential surface of the shell body, or one of the two insulation edges 3 is located on the outer circumferential surface of the shell body 1, and the other is located on the axial end surface of the shell body 1, or the two insulation edges 3 are located on the two axial end surfaces of the shell body 1, respectively.

[0062] In Figures 4-6 In the example shown, one of the two edges of the insulation coating 2 terminates on the end surface of the axial one end of the shell body 1, and one of the two corresponding insulation edges 3 is arranged on the same end surface of the axial one end of the shell body 1, and the axial end surface of the shell body 1 is provided with a groove 11 recessed inwardly into the shell body 1, one edge of the insulation coating 2 is located in the groove 11, and the same side insulation edge 3 is filled in the groove 11. The other edge of the insulation coating 2 terminates on the outer circumferential surface of the shell body 1, and the other insulation edge 3 is located on the outer circumferential surface of the shell body 1, and the axial other end of the shell body 1 has a formed roll groove when the shell body 1 is sealed, the roll groove is formed on the outer circumferential surface, and the edge of the insulation coating 2 is located in the roll groove, and the other insulation edge 3 is located in the roll groove.

[0063] As Figures 8-10 shown, the shell body 1 includes a cylinder 13 and a sealing cover plate 14, the axial one end of the cylinder 13 is open, and the sealing cover plate 14 is arranged at the open end of the cylinder 13, and a sealing ring 15 is arranged between the sealing cover plate 14 and the cylinder 13. Wherein, the outer circumferential wall of the one end of the cylinder 13 close to the open end has a roll groove recessed inwardly, and the inner circumferential wall of the cylinder 13 forms a protruding part 16 opposite to the roll groove, and the sealing cover plate 14 is arranged on the side of the protruding part 16 facing the outside of the open end. In addition, the open end of the cylinder 13 is bent towards the inside and forms a fixing groove 17 between the protruding part 16, and the sealing cover plate 14 is arranged in the fixing groove 17. In addition, as Figures 1-4 shown, the closed end of the cylinder 13 is provided with a pole 12.

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

[0065] The single battery according to the embodiment of the present application includes the battery shell 100 described above.

[0066] Wherein, the single battery can be a cylindrical battery, a square battery, etc., and the battery shell 100 can be provided with a pole group, and the pole group can be a stacked pole group or a wound pole group.

[0067] The single battery according to the embodiment of the present application, by setting the battery shell 100, the insulating edge 3 is set at the edge of the insulating coating 2 outside the shell body 1, the insulating edge 3 is partially stacked with the edge of the insulating coating 2 and located at the side of the insulating coating 2 away from the shell body 1, and partially exceeds the insulating coating 2 and directly connects with the shell body 1, so that the adhesion between the edge of the insulating coating 2 and the shell body 1 can be enhanced, the risk of edge warping and separation of the insulating coating 2 from the shell body 1 can be reduced, and the problems of corrosion and insulation failure of the shell body 1 can be improved.

[0068] A battery pack according to an embodiment of the present application is described below.

[0069] The battery pack according to the embodiment of the present application comprises the single battery described above.

[0070] It can be understood that the battery shell 100 described above serves as a shell of the battery pack, and the battery shell 100 described above can be internally provided with a battery module or the like.

[0071] The battery pack according to the embodiment of the present application, by setting the single battery described above, the insulating edge 3 is set at the edge of the insulating coating 2 outside the shell body 1, the insulating edge 3 is partially stacked with the edge of the insulating coating 2 and located at the side of the insulating coating 2 away from the shell body 1, and partially exceeds the insulating coating 2 and directly connects with the shell body 1, so that the adhesion between the edge of the insulating coating 2 and the shell body 1 can be enhanced, the risk of edge warping and separation of the insulating coating 2 from the shell body 1 can be reduced, and the problems of corrosion and insulation failure of the shell body 1 can be improved.

[0072] A battery pack according to another embodiment of the present application is described below.

[0073] The battery pack according to the embodiment of the present application comprises the single battery described above.

[0074] The single battery is arranged in the shell of the battery pack, and the single battery can be multiple.

[0075] The battery pack according to the embodiment of the present application, by setting the single battery described above, the insulating edge 3 is set at the edge of the insulating coating 2 outside the shell body 1, the insulating edge 3 is partially stacked with the edge of the insulating coating 2 and located at the side of the insulating coating 2 away from the shell body 1, and partially exceeds the insulating coating 2 and directly connects with the shell body 1, so that the adhesion between the edge of the insulating coating 2 and the shell body 1 can be enhanced, the risk of edge warping and separation of the insulating coating 2 from the shell body 1 can be reduced, and the problems of corrosion and insulation failure of the shell body 1 can be improved.

[0076] An electric device according to an embodiment of the present application is described below.

[0077] The power consuming device according to the embodiment of the present application comprises the single battery as described above, wherein the single battery can be one or more.

[0078] The power consuming device according to the embodiment of the present application comprises the battery package as described above, and comprises the battery shell 100 or the single battery as described above. The insulating sealing edge 3 is arranged at the edge of the insulating coating 2 outside the shell body 1. The insulating sealing edge 3 is arranged in a manner of being partially laminated with the edge of the insulating coating 2 and located at the side of the insulating coating 2 away from the shell body 1. The insulating sealing edge 3 is partially directly attached to the shell body 1 beyond the insulating coating 2. The adhesion between the edge of the insulating coating 2 and the shell body 1 can be enhanced. The risk of the edge of the insulating coating 2 being warped or separated from the shell body 1 can be reduced. The problems of corrosion and insulation failure of the shell body 1 can be improved.

[0079] The power consuming device according to another embodiment of the present application is described below.

[0080] The power consuming device according to the embodiment of the present application comprises the battery package as described above.

[0081] The power consuming device according to the embodiment of the present application comprises the battery package as described above, and comprises the battery shell 100 or the single battery as described above. The insulating sealing edge 3 is arranged at the edge of the insulating coating 2 outside the shell body 1. The insulating sealing edge 3 is arranged in a manner of being partially laminated with the edge of the insulating coating 2 and located at the side of the insulating coating 2 away from the shell body 1. The insulating sealing edge 3 is partially directly attached to the shell body 1 beyond the insulating coating 2. The adhesion between the edge of the insulating coating 2 and the shell body 1 can be enhanced. The risk of the edge of the insulating coating 2 being warped or separated from the shell body 1 can be reduced. The problems of corrosion and insulation failure of the shell body 1 can be improved.

[0082] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A battery case characterized by comprising: The battery shell (100) comprises: a shell body (1); an insulating coating (2) provided on the outer surface of the shell body (1); an insulating edge (3) partially laminated 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 exceeding the insulating coating (2) and directly attached to the outer surface of the shell body (1) to fix the edge of the insulating coating (2) to the shell body (1).

2. The battery case according to claim 1, wherein The outer surface of the shell body (1) has a groove (11), at least part of the edge of the insulating coating (2) is located in the groove (11), and at least part of the insulating edge (3) is located in the groove (11) and directly attached to the inner wall of the groove (11).

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

4. The battery housing of any one of claims 1-3, wherein, The insulating coating (2) comprises: an adhesion layer (21) provided on the outer surface of the shell body (1); a protective layer (22) provided outside the adhesion layer (21), and the insulating edge (3) covers at least part of the edge of the protective layer (22).

5. The battery case of claim 4, wherein, The edge of the adhesion layer (21) exceeds or is flush with the edge of the protective layer (22); And / or, the width of the edge of the protective layer (22) covered by the insulating edge (3) 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 case of claim 4, wherein, The insulating coating (2) further comprises: an intermediate layer provided between the adhesion layer (21) and the protective layer (22).

7. The battery case of claim 6, wherein, The thicknesses of the adhesion layer (21), the intermediate layer, and the protective layer (22) increase in order or are equal; And / or, the total thickness of the intermediate layer and the protective layer (22) is 50μm-150μm.

8. The battery housing of any one of claims 1-3, wherein, The insulating coating (2) surrounds the shell body (1), and the insulating coating (2) has two annular edges located on both axial sides of the shell body (1), and the insulating edge (3) is two, Both of the insulating edges (3) are provided on the outer circumferential surface of the shell body (1), or at least one of the two insulating edges (3) is provided on the axial end surface of the shell body (1).

9. A single cell characterized by, The battery shell (100) according to any one of claims 1-8.

10. A battery pack, characterized by, The battery shell (100) according to any one of claims 1-8 or the single battery according to claim 9.

11. An electrical device, characterized by The single battery according to claim 9 or the battery pack according to claim 10.

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