Large-cylinder high-rate battery steel shell structure and battery

Abstract

The utility model discloses a large-cylinder high-magnification battery steel shell structure which comprises a cylindrical battery shell, one end of the battery shell is provided with an opening, the battery shell comprises a bottom wall and a side wall, the bottom wall and the side wall are integrally connected, the side wall comprises a thickened part and a shoulder part, and the thickened part and the shoulder part are integrally connected. The shoulder part is provided with an opening, the thickened part is arranged above the shoulder part and close to the opening, the thickness of the thickened part is larger than that of the shoulder part, a transition section is arranged between the thickened part and the shoulder part, the transition section is provided with an inclined slope, and the thickness of the transition section is gradually increased from the shoulder part to the thickened part. According to the utility model, the thickness distribution of the battery shell 1 is optimized, so that the aims of reducing the mass of the steel shell and improving the energy density of the battery are fulfilled on the premise of ensuring the stability of the punching groove and the sealing effect of the seal, and the overall performance of the battery is further improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a large cylindrical high-rate battery steel shell structure and a battery. Background Art

[0002] With the development of the industry, the application scenarios of lithium (sodium) ion batteries are becoming more and more extensive. With the development of the new energy industry, lithium (sodium) ions have penetrated into various fields. The requirements for batteries are comprehensive indicators such as capacity, life, safety, environmental adaptability, model, and rate. Cylindrical batteries are widely used in various fields such as energy storage, power supply, and electric vehicles due to their low production cost, high production efficiency, and good safety.

[0003] In the field of battery manufacturing, the design and manufacture of battery steel shells have a crucial impact on the performance and quality of batteries. The overall thickness of traditional battery steel shells is consistent, which can easily cause deformation at the opening of the battery shell when the battery shell is notched, affecting the sealing effect of the battery. Since the thickness of the steel shell affects the energy density of the battery, if the overall thickness of the battery shell is too thick, it will increase the weight and reduce the energy density of the battery. Therefore, how to reduce the quality of the steel shell and improve the energy density of the battery while ensuring the stability of the notching and the sealing effect of the sealing is an urgent problem to be solved. Utility Model Content

[0004] The utility model aims to provide a large cylindrical high-rate battery steel shell structure and a battery that solves the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large cylindrical high-rate battery steel shell structure comprises a cylindrical battery shell, one end of which is provided with an opening, the battery shell comprising a bottom wall and a side wall, the bottom wall and the side wall being integrally connected, the side wall comprising a thickened portion and a shoulder, the thickened portion being arranged above the shoulder and close to the opening, the thickness of the thickened portion being greater than that of the shoulder, a transition section being arranged between the thickened portion and the shoulder, the transition section being provided with an inclined slope, and the thickness of the transition section gradually increasing from the shoulder to the thickened portion.

[0007] Preferably, the length of the thickened portion is 15-25 mm, and the thickness of the thickened portion is 0.45-0.65 mm.

[0008] Preferably, the thickness of the shoulder is 0.35-0.55 mm, and the thickness of the bottom wall is 0.45-0.65 mm.

[0009] Preferably, the inner wall of the battery housing is provided with an insulating layer for preventing internal short circuit of the battery.

[0010] Preferably, the battery housing is made of steel.

[0011] Preferably, the battery housing is integrally formed by stamping.

[0012] The utility model also comprises a battery, which comprises a battery core and a cover cap. The battery shell wraps the battery core, and the cover cap is sealed and connected to the battery shell.

[0013] The beneficial effects of the utility model are as follows: the invention optimizes the thickness distribution of the battery shell and sets a thickened portion on the top of the battery shell, which not only enhances the stability of the battery shell punching groove, but also ensures the sealing effect of the battery seal, effectively prevents the leakage of the electrolyte inside the battery, and improves the safety performance of the battery. The thickness of the shoulder is less than that of the thickened portion, which effectively reduces the overall weight of the steel shell, thereby improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the partially enlarged structure of species A;

[0016] Among them, the battery housing 1 , the bottom wall 11 , the side wall 12 , the thickened portion 121 , the shoulder 122 , the transition section 123 , the inclined surface 124 , and the opening 2 . DETAILED DESCRIPTION

[0017] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 to Figure 2As shown, the utility model provides a large cylindrical high-rate battery steel shell structure, including a cylindrical battery shell 1, the material of the battery shell 1 is metal, such as steel. An opening 2 is opened at one end of the battery shell 1, and the battery shell 1 includes a bottom wall 11 and a side wall 12, and the bottom wall 11 and the side wall 12 are integrally connected. Among them, the side wall 12 includes a thickened portion 121 and a shoulder 122, and the thickened portion 121 is arranged above the shoulder 122, and the thickened portion 121 is arranged at a position close to the opening 2. The thickness of the thickened portion 121 is greater than that of the shoulder 122, and a transition section 123 is arranged between the thickened portion 121 and the shoulder 122, and the transition section 123 is provided with an inclined slope 124, and the thickness of the transition section 123 gradually increases from the shoulder 122 to the thickened portion 121.

[0020] The battery shell 1 of the utility model is integrally formed by stamping. Furthermore, the length of the thickened portion 121 of the utility model is 15-25mm, and the thickness of the thickened portion 121 is 0.45-0.65mm. By arranging the thickened portion on the top of the battery shell 1, the stability of the punching groove of the battery shell 1 can be ensured, and the sealing effect of the seal can be ensured at the same time. The thickness of the shoulder 122 of the utility model is 0.35-0.55mm, and the thickness of the shoulder 122 is less than the thickness of the thickened portion 121, which can reduce the weight of the battery steel shell 1, improve the battery energy density, and does not affect the battery punching groove, sealing ratio and other performance. The thickness of the bottom wall 11 of the utility model is 0.45-0.65mm.

[0021] Furthermore, an insulating layer is coated on the inner wall of the battery casing 1 to prevent short circuit inside the battery.

[0022] The utility model also includes a battery, which includes a battery cell (not shown) and a cap (not shown), wherein the battery cell is wrapped in a battery housing 1, and the cap is arranged at an opening 2 and is sealed and connected to the battery housing 1. The battery cell and the cap are common structures in the art, and the technical effect can be achieved.

[0023] The utility model optimizes the thickness distribution of the battery shell 1, thereby achieving the purpose of reducing the steel shell mass and improving the battery energy density while ensuring the stability of the punching groove and the sealing effect, thereby further improving the overall performance of the battery.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A large cylindrical high-rate battery steel shell structure, comprising a cylindrical battery shell, one end of which is provided with an opening, characterized in that: The battery housing includes a bottom wall and a side wall, the bottom wall and the side wall are integrally connected, the side wall includes a thickened portion and a shoulder, the thickened portion is arranged above the shoulder and close to the opening, the thickness of the thickened portion is greater than the shoulder, a transition section is arranged between the thickened portion and the shoulder, the transition section is provided with an inclined slope, and the thickness of the transition section gradually increases from the shoulder to the thickened portion.

2. The large cylindrical high-rate battery steel shell structure according to claim 1 is characterized in that: The length of the thickened portion is 15-25 mm, and the thickness of the thickened portion is 0.45-0.65 mm.

3. The large cylindrical high-rate battery steel shell structure according to claim 1 is characterized in that: The thickness of the shoulder is 0.35-0.55 mm, and the thickness of the bottom wall is 0.45-0.65 mm.

4. The large cylindrical high-rate battery steel shell structure according to claim 1 is characterized in that: The inner wall of the battery housing is provided with an insulating layer for preventing a short circuit inside the battery.

5. The large cylindrical high-rate battery steel shell structure according to claim 1 is characterized in that: The material of the battery casing is steel.

6. The large cylindrical high-rate battery steel shell structure according to claim 1, characterized in that: The battery housing is integrally formed by stamping.

7. A battery according to any one of claims 1 to 6, characterized in that: The invention comprises a battery core and a cap, wherein the battery core is wrapped by a battery casing, and the cap is sealed and connected to the battery casing.

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