Battery shell, battery and electrical equipment

Abstract

The utility model is applicable to the technical field of battery structures, and provides a battery shell, a battery and electrical equipment, the battery shell comprises a cylindrical shell and a bottom shell, an opening is formed in the top of the shell, the diameter of the opening is smaller than that of the shell, and the bottom shell is arranged at the bottom of the shell; a welding platform is arranged on the inner surface of the bottom shell and used for being connected with the roll core in a welded mode. Through the arrangement, the bottom shell is welded and connected with the roll core through the welding platform, so that the welding difficulty can be effectively reduced, the welding between the bottom shell and the roll core is stable and reliable, and the product yield is improved.

Description

Technical Field

[0001] This application belongs to the field of battery structure technology, and in particular relates to a battery casing, battery and electrical equipment. Background Technology

[0002] Existing cylindrical battery casing designs are typically double-through casings of equal diameter or single-through casings with a bottom, with the bottom and top cover welded together for sealing. Due to the high pressure resistance requirements of cylindrical batteries, the battery casing needs to be very strong to withstand the pressure.

[0003] The cylindrical batteries commonly found on the market use a concave design at the bottom of the casing. This shape can evenly distribute stress when subjected to pressure, reduce stress concentration, improve the strength of the battery casing, and achieve pressure resistance.

[0004] However, the concave design at the bottom of the shell is not conducive to welding between the bottom of the shell and the core, making welding difficult and prone to poor welding, resulting in low product yield. Utility Model Content

[0005] This application provides a battery casing that aims to solve the problems of high welding difficulty and low yield rate between existing battery casings and winding cores.

[0006] This application embodiment is implemented as follows: a battery casing is provided, comprising:

[0007] A cylindrical shell with an opening at the top, the diameter of which is smaller than the diameter of the shell; and

[0008] The bottom shell is located at the bottom of the casing;

[0009] The inner surface of the bottom shell is provided with a welding platform, which is used for welding connection with the core.

[0010] Furthermore, the welding platform is also used for welding connections with the manifold.

[0011] Furthermore, the center of the bottom shell is recessed inward and smoothly transitions outward from the center, and the welding platform is a plane set at the center of the bottom shell.

[0012] Furthermore, the bottom shell has an inclined surface at its edge, which is used for a transitional connection with the bottom of the shell.

[0013] Furthermore, the opening extends toward the axis of the shell and contracts to form a constriction.

[0014] Furthermore, it also includes a top cover, which is sealed at the constriction.

[0015] Furthermore, the connection between the top cover and the constricted opening can be any one of welding, mechanical sealing, or rotary sealing.

[0016] Furthermore, the thickness of the shell is 0.05 mm to 0.15 mm.

[0017] Secondly, this application also provides a battery, including the battery casing as described above.

[0018] Thirdly, this application also provides an electrical device, including the battery as described above.

[0019] The beneficial effects of this application are as follows: The battery casing provided by this application includes a cylindrical casing with an opening at the top, the diameter of which is smaller than the diameter of the casing, and a bottom casing disposed at the bottom of the casing; a welding platform is provided on the inner surface of the bottom casing for welding connection with the winding core. Through the above arrangement, the bottom casing is welded to the winding core via the welding platform, which effectively reduces the welding difficulty, makes the welding between the bottom casing and the winding core stable and reliable, and improves product yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery casing provided in this application;

[0021] Figure 2 This is a cross-sectional structural schematic diagram of one embodiment of the battery casing provided in this application;

[0022] Figure 3 This is a schematic diagram of another embodiment of the battery casing provided in this application;

[0023] Figure 4 This is a front view schematic diagram of another embodiment of the battery casing provided in this application.

[0024] Explanation of reference numerals in the attached drawings: 100-shell, 110-recessed opening, 200-bottom shell, 210-sloping surface, 300-welding platform, 400-top cover. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. Examples of 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 application, and should not be construed as limiting this application. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0026] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference values ​​and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0031] The battery casing provided in this application includes a cylindrical casing with an opening at the top, the diameter of which is smaller than the diameter of the casing; and a bottom casing disposed at the bottom of the casing; a welding platform is provided on the inner surface of the bottom casing for welding connection with the winding core. Through the above arrangement, the bottom casing is welded to the winding core via the welding platform, which effectively reduces welding difficulty, ensures stable and reliable welding between the bottom casing and the winding core, and improves product yield.

[0032] like Figures 1 to 4 As shown, one embodiment of this application provides a battery casing, including:

[0033] A cylindrical housing 100, the top of which has an opening, the diameter of which is smaller than the diameter of the housing; and

[0034] The bottom shell 200 is located at the bottom of the housing 100;

[0035] The inner surface of the bottom shell 200 is provided with a welding platform 300, which is used for welding connection with the core.

[0036] The battery casing includes a housing 100 and a bottom shell 200. The housing 100 is cylindrical, with openings at both the top and bottom. The bottom of the housing 100 is connected to the bottom shell 200, which seals the bottom of the housing 100. Battery cells and other components can be inserted into the housing 100 through the opening at the top.

[0037] Optionally, the bottom shell 200 and the housing 100 can be connected by welding, mechanical sealing, or rotation, with welding being preferred, as the connection between the housing 100 and the bottom shell 200 is more stable and reliable.

[0038] Optionally, the bottom shell 200 and the shell 100 can also adopt an integral molding structure to ensure the structural reliability and structural strength of the battery shell.

[0039] The inner surface of the bottom shell 200 is provided with a welding platform 300, which is a welding pad provided on the bottom shell 200 so that the welding platform 300 can be welded to the core.

[0040] In some embodiments, the welding platform 300 is also used for welding connection with a manifold (not shown), which in turn is welded connection with the core, thereby realizing the electrical connection between the welding platform 300 and the core.

[0041] The current collector is a key component in a battery system. Its main function is to connect the positive and negative terminals of the battery to ensure smooth current transmission.

[0042] Alternatively, the manifold is typically made of metal sheet or metal foil, for example, the manifold is made of at least one of copper, aluminum and nickel, which have good electrical conductivity and mechanical strength.

[0043] During assembly, the collector plate and the core are first welded together, and then the assembly of the collector plate and the core is inserted into the housing 200 so that the collector plate and the welding platform 300 come into contact and are then welded.

[0044] A wound core refers to a battery cell assembled in a wound manner, and a battery composed of wound cores is called a wound battery.

[0045] As one possible implementation, solder paste or other solder materials can also be provided on the welding platform 300 to facilitate subsequent welding with the manifold and improve welding reliability.

[0046] Optionally, the thickness of the housing 100 is 0.05 mm to 0.15 mm, for example, the thickness of the housing 100 is any value from 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.05 mm to 0.15 mm, preferably 0.1 mm, without specific limitation, and has the characteristics of thin wall and high pressure resistance.

[0047] The battery casing provided in this application includes a cylindrical casing 100 with an opening at the top, the diameter of which is smaller than the diameter of the casing 100; and a bottom casing 200 disposed at the bottom of the casing 100; a welding platform 300 is provided on the inner surface of the bottom casing 200 for welding connection with the winding core. Through the above arrangement, the bottom casing 200 is welded to the winding core via the welding platform 300, which effectively reduces welding difficulty, ensures stable and reliable welding between the bottom casing 200 and the winding core, and improves product yield.

[0048] In some embodiments, the center of the bottom shell 200 is recessed inward and smoothly transitions outward from the center, and the welding platform 300 is a plane disposed at the center of the bottom shell 200.

[0049] The concave design of the housing 100 allows for uniform stress distribution when the battery casing is under pressure, reducing stress concentration. Furthermore, the central portion of the bottom shell 200 is flattened into a plane, which serves as the welding platform 300, eliminating the need for additional welding pads and resulting in a simple and reliable structure.

[0050] In some embodiments, the bottom shell 200 has an inclined surface 210 at its edge, which is used for a transitional connection with the bottom of the housing 100. The inclined surface 210 is a transitional surface between the housings 100 and the housing 100. This arrangement can improve the structural strength of the battery casing and enhance its pressure resistance.

[0051] In some embodiments, the opening at the top of the housing 100 extends toward the axis of the housing 100 and narrows to form a constriction 110. The constriction 110 design provides good cushioning and improves the pressure resistance of the battery casing.

[0052] In some embodiments, the battery casing provided in this application further includes a top cover 400, which is disposed at the constriction 110. In practice, the top cover 400 and the constriction 110 can be sealed and connected by welding, mechanical sealing or rotation to achieve a seal between the top cover 400 and the constriction 110, strengthen the structure of the battery casing, and effectively improve the pressure resistance.

[0053] In some embodiments, this application also provides a battery, including the battery casing as described above.

[0054] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the structure and implementation principle of the battery described above can be referred to the corresponding structure and implementation principle in the foregoing embodiments, and will not be repeated here.

[0055] The battery casing provided in this application includes a cylindrical casing 100 with an opening at the top, the diameter of which is smaller than the diameter of the casing 100; and a bottom casing 200 disposed at the bottom of the casing 100; a welding platform 300 is provided on the inner surface of the bottom casing 200 for welding connection with the winding core. Through the above arrangement, the bottom casing 200 is welded to the winding core via the welding platform 300, which effectively reduces welding difficulty, ensures stable and reliable welding between the bottom casing 200 and the winding core, and improves product yield.

[0056] In some embodiments, this application also provides an electrical device including the battery as described above.

[0057] When implemented, electrical equipment includes, but is not limited to, communication equipment, smart devices, power supplies, or related components used in automotive electrical equipment, medical equipment, and household appliances, without limitation.

[0058] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the structure and implementation principle of the electrical equipment described above can be referred to the corresponding structure and implementation principle in the foregoing embodiments, and will not be repeated here.

[0059] The battery casing provided in this application includes a cylindrical casing 100 with an opening at the top, the diameter of which is smaller than the diameter of the casing 100; and a bottom casing 200 disposed at the bottom of the casing 100; a welding platform 300 is provided on the inner surface of the bottom casing 200 for welding connection with the winding core. Through the above arrangement, the bottom casing 200 is welded to the winding core via the welding platform 300, which effectively reduces welding difficulty, ensures stable and reliable welding between the bottom casing 200 and the winding core, and improves product yield.

[0060] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery casing, characterized in that, include: A cylindrical shell having an opening at the top, the diameter of which is smaller than the diameter of the shell. as well as A bottom shell, wherein the bottom shell is disposed at the bottom of the housing; The inner surface of the bottom shell is provided with a welding platform, which is used for welding connection with the core.

2. The battery casing as described in claim 1, characterized in that, The welding platform is also used for welding connections with the manifold.

3. The battery casing as described in claim 1, characterized in that, The center of the bottom shell is recessed inward and smoothly transitions outward from the center, and the welding platform is a plane located at the center of the bottom shell.

4. The battery casing as described in claim 1, characterized in that, The bottom shell has an inclined surface at its edge, which is used for transitional connection with the bottom of the shell.

5. The battery casing as described in claim 1, characterized in that, The opening extends toward the axis of the housing and narrows to form a constricted opening.

6. The battery casing as described in claim 5, characterized in that, It also includes a top cover, which is provided to seal the constricted opening.

7. The battery casing as described in claim 6, characterized in that, The connection between the top cover and the constricted opening can be any one of welding, mechanical sealing, or rotary sealing.

8. The battery casing as described in any one of claims 1 to 7, characterized in that, The thickness of the shell is 0.05 mm to 0.15 mm.

9. A battery, characterized in that, Includes the battery casing as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.

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