Battery aluminum shell and secondary battery

Abstract

The utility model discloses a battery aluminum shell and a secondary battery, the battery aluminum shell comprises a square aluminum shell, the square aluminum shell comprises two oppositely arranged first side panels and two oppositely arranged second side panels, and the width of the first side panels is greater than that of the second side panels; the first side panel comprises a first area panel with a first thickness and a second area panel with a second thickness, the first thickness is larger than the second thickness, and the first area panel is used for being in welded connection with a top cover assembly of the secondary battery. According to the embodiment of the invention, the first area panel with the first thickness and the second area panel with the second thickness are arranged on the first side panel with the larger width, so that the first area panel with the larger thickness is used for being in welded connection with the top cover assembly of the secondary battery; therefore, the stable welding quality between the top cover assembly and the square aluminum shell is ensured, the welding yield is improved, the material consumption of the aluminum shell is effectively reduced through the second area panel with the small thickness, and therefore the battery manufacturing cost is reduced.

Description

Technical Field

[0001] This application belongs to the field of secondary battery technology, and particularly relates to a battery aluminum shell and a secondary battery. Background Technology

[0002] In the field of secondary battery technology, the structure of a secondary battery typically includes an aluminum casing (referred to as "aluminum casing") and a matching top cover assembly, wherein the top cover assembly and the aluminum casing are stably connected by a welding process.

[0003] However, the aluminum casings used in current mainstream technologies generally have an excessively large overall thickness. This design feature not only increases the consumption of raw materials required for aluminum casing manufacturing, but also directly leads to a significant increase in battery manufacturing costs, especially in terms of aluminum casing material costs.

[0004] Given that material costs account for a significant proportion of the total battery cost, how to effectively reduce the amount of aluminum casing material to lower the overall cost, while ensuring stable welding quality and improving welding yield between the top cover assembly and the aluminum casing, has become a pressing technical problem to be solved in this field. Utility Model Content

[0005] In view of this, this application provides an aluminum battery casing and a secondary battery to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0007] The first aspect of this application provides a battery aluminum casing, including a square aluminum casing with an opening. The square aluminum casing includes two opposing first side panels and two opposing second side panels, wherein the width of the first side panels is greater than the width of the second side panels.

[0008] The first side panel includes a first region panel with a first thickness and a second region panel with a second thickness, the first thickness being greater than the second thickness, and the first region panel being used for welding connection to the top cover assembly of the secondary battery.

[0009] In some embodiments, the first side panel further includes a ramp area panel for transitionally connecting the first area panel and the second area panel, wherein the outer surface of the ramp area panel is a plane and the inner surface is a ramp.

[0010] In some embodiments, the ratio of the first thickness to the second thickness is 1.05 to 1.2.

[0011] In some embodiments, the difference between the first thickness and the second thickness is 0.05 to 0.15 mm.

[0012] In some embodiments, the first thickness is 0.2 to 2 mm.

[0013] A second aspect of this application provides a secondary battery, including a top cover assembly and the aforementioned aluminum battery casing.

[0014] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0015] This application provides a battery aluminum shell and a secondary battery. By providing a first area panel with a first thickness and a second area panel with a second thickness on a first side panel with a larger width, the thicker first area panel is used for welding connection with the top cover assembly of the secondary battery. This ensures stable welding quality and improves welding yield between the top cover assembly and the square aluminum shell. The thinner second area panel effectively reduces the material usage of the aluminum shell, thereby reducing battery manufacturing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This paper shows a schematic diagram of the structure of an aluminum battery casing according to an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of the first side panel provided in an embodiment of this application is shown;

[0019] Figure 3 It shows Figure 2 The right view of the first side panel shown.

[0020] Illustration:

[0021] 10. Square aluminum shell; 11. Opening; 12. First side panel; 121. First area panel; 122. Second area panel; 123. Sloping area panel; 13. Second side panel. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] This application provides an electrode post structure with a smart chip, a top cover assembly, and a secondary battery. By opening a mounting hole in the middle of the electrode post for installing the smart chip, the real-time performance and accuracy of the smart chip's temperature monitoring can be improved, while also enabling monitoring of the internal pressure and temperature of the battery.

[0026] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0027] Please see Figures 1 to 3 As shown, this application embodiment provides a battery aluminum casing, including a square aluminum casing 10 with an opening 11. The square aluminum casing 10 includes two opposing first side panels 12 and two opposing second side panels 13, the width of the first side panels 12 being greater than the width of the second side panels 13.

[0028] The first side panel 12 includes a first region panel 121 with a first thickness and a second region panel 122 with a second thickness. The first thickness is greater than the second thickness. The first region panel 121 is used for welding connection with the top cover assembly of the secondary battery.

[0029] The aforementioned battery aluminum casing, by providing a first area panel 121 with a first thickness and a second area panel 122 with a second thickness on the first side panel 12 with a larger width, allows the thicker first area panel 121 to be used for welding connection with the top cover assembly of the secondary battery, thereby ensuring stable welding quality and improving welding yield between the top cover assembly and the square aluminum casing 10, and the thinner second area panel 122 to effectively reduce the amount of aluminum casing material used, thereby reducing battery manufacturing costs.

[0030] In some embodiments, the first side panel 12 further includes a ramp area panel 123, which serves as a transitional connection between the first area panel 121 and the second area panel 122. The outer surface of the ramp area panel 123 is flat, and the inner surface is ramped. This configuration avoids obvious steps on the inner wall of the first side panel 12, thus preventing any impact on battery performance.

[0031] In some embodiments, the ratio of the first thickness to the second thickness is 1.05 to 1.2. In this embodiment, when the second thickness is a fixed value or a fixed range, the ratio is kept as low as possible. This can reduce the amount of aluminum shell material used, thereby reducing battery manufacturing costs, while ensuring stable welding quality and improving welding yield between the top cover assembly and the square aluminum shell 10.

[0032] In some embodiments, the difference between the first thickness and the second thickness is 0.05 to 0.15 mm. In this embodiment, when the second thickness is a fixed value or a fixed range, the difference is kept as low as possible. This can reduce the amount of aluminum shell material used, thereby reducing battery manufacturing costs, while ensuring stable welding quality and improving welding yield between the top cover assembly and the square aluminum shell 10.

[0033] In some embodiments, the first thickness is 0.2 to 2 mm.

[0034] This application also provides a secondary battery, including a top cover assembly and a battery aluminum casing as described in any of the above embodiments. The top cover assembly and the first region panel 121 of the battery aluminum casing are welded together. As an example, the secondary battery is a lithium-ion battery.

[0035] The aforementioned secondary battery also possesses the aforementioned beneficial effects, namely, it can effectively reduce the amount of aluminum shell material used to lower the overall cost, while ensuring stable welding quality and improving welding yield between the top cover assembly and the aluminum shell.

[0036] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery aluminum can, characterized by, The square aluminum case with an opening includes two oppositely arranged first side panels and two oppositely arranged second side panels, the width of the first side panel is greater than the width of the second side panel; The first side panel includes a first area panel with a first thickness and a second area panel with a second thickness, the first thickness is greater than the second thickness, and the first area panel is used for welding connection with a top cover assembly of a secondary battery.

2. The battery aluminum can according to claim 1, wherein, The first side panel further includes a slope area panel used for transition connection of the first area panel and the second area panel, the outer side of the slope area panel is a plane, and the inner side is an inclined surface.

3. A battery can according to claim 1 or 2, wherein The ratio of the first thickness to the second thickness is 1.05-1.

2.

4. The battery aluminum can according to claim 1 or 2, wherein, The difference between the first thickness and the second thickness is 0.05-0.15 mm.

5. The battery aluminum can according to claim 1 or 2, wherein The first thickness is 0.2-2 mm.

6. A secondary battery characterized by comprising: The battery aluminum case includes a top cover assembly and a battery aluminum case according to any one of claims 1-5.

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