High-hardness battery top cover plate

Abstract

The utility model discloses a high-hardness battery top cover plate which comprises a cover plate body, the cover plate body is a metal thin plate with the hardness of more than 80 HV, and the circumferential outer side part of the cover plate body is punched to form first recesses which are arranged continuously or at intervals; a first recess is formed in the horizontal surface of the cover plate body, so that a peripheral side wall located in the first recess and a step body located at one end of the peripheral side wall are formed on the circumferential outer side of the cover plate body, second recesses which are continuously or alternately arranged are formed in the horizontal surface of the cover plate body through stamping, and the second recesses are adjacent to the peripheral side wall in the first recess; the peripheral side wall is in a vertical state relative to the horizontal surface of the cover plate body. The structure increases the strength of the battery top cover plate, so that the battery top cover plate is stable in structure and not easy to deform.

Description

Technical Field

[0001] This utility model belongs to the technical field of components for new energy vehicle batteries, specifically relating to a high-hardness battery top cover. Background Technology

[0002] New energy vehicle batteries consist of cells, casing, and top cover. The cells are located inside the casing, and the top cover seals the casing to encapsulate the cells. The top cover itself consists of a top cover plate and terminals mounted on it. Therefore, the hardness of the top cover plate, as a crucial component of new energy vehicle batteries, is of great concern. Currently, the top cover plates used to construct the casing of new energy vehicle batteries are all made of aluminum. While aluminum plates are highly malleable and easy to stamp, they suffer from low hardness and poor corrosion resistance, thus requiring urgent improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a high-hardness battery top cover to overcome the shortcomings of the existing technology.

[0004] To achieve the above objectives, the present invention provides a high-hardness battery top cover, comprising a cover body, wherein the cover body is a thin metal sheet with a hardness of 80 HV or higher. The outer circumferential portion of the cover body is stamped to form continuous or spaced first recesses, thereby forming an outer peripheral sidewall located within the first recess and a step at one end of the outer peripheral sidewall. The horizontal surface of the cover body is stamped to form continuous or spaced second recesses, the second recesses being adjacent to the outer peripheral sidewall within the first recess. The outer peripheral sidewall is perpendicular to the horizontal surface of the cover body. The thin metal sheet with a hardness of 80 HV or higher is stainless steel or titanium.

[0005] According to the high-hardness battery top cover plate described above, the horizontal surface edge of the cover plate body is stamped with continuously arranged chamfers, and the chamfers are located between the outer peripheral sidewall and the second recess, so that the other end of the outer peripheral sidewall is connected to the chamfers, and the chamfers are rounded corners or bevels.

[0006] According to the high-hardness battery top cover plate described above, the first recess or the second recess or the step is continuously formed along the outer shape of the cover plate body, such that one of them is a ring structure, and the outer shape of the cover plate body is rectangular, square or circular.

[0007] According to the high-hardness battery top cover plate described above, the second recessed cross section is an isosceles trapezoidal structure or an isosceles triangular structure.

[0008] According to the high-hardness battery top cover plate described above, the step body is arranged perpendicularly to the outer peripheral sidewall so that the step body has a horizontal structure.

[0009] According to the high-hardness battery top cover plate described above, a plurality of recessed snap-fit ​​positions are formed on the horizontal surface of the cover plate body.

[0010] According to the high-hardness battery top cover plate described above, the step body is arranged perpendicularly to the outer peripheral sidewall so that the step body has a horizontal structure, and the inner wall of the step body and the outer peripheral sidewall are connected perpendicularly to each other.

[0011] This utility model provides a high-hardness battery top cover plate, which has the following beneficial effects:

[0012] First, the cover plate body is made of a thin metal sheet with a hardness of 80 HV or higher, which makes the battery top cover plate on the outer shell of new energy vehicle batteries have high hardness, thereby increasing the strength of the battery top cover plate, making the battery top cover plate structure stable and not easy to deform.

[0013] II. The cover plate body is made of stainless steel or titanium plate, giving the battery top cover plate the following characteristics:

[0014] 1. High strength and lightweight characteristics: The high strength of the battery top cover allows it to withstand the internal pressure generated by the new energy vehicle battery during use. At the same time, the relatively low internal structural density of the sheet material allows the battery top cover to reduce the weight of the battery while ensuring the structural strength of the battery. This is of great significance for improving the range of new energy vehicles, drones and other equipment.

[0015] 2. High safety: Stainless steel or titanium plates have high temperature resistance and corrosion resistance. In the event of high temperature or leakage of internal chemical substances during the charging and discharging process of new energy vehicle batteries, stainless steel or titanium plates can remain stable and are not prone to deformation, cracking or corrosion. This effectively prevents the leakage of flammable and explosive substances inside the battery and reduces safety risks.

[0016] 3. Long lifespan: Due to the good corrosion resistance and stability of stainless steel or titanium plates, they can maintain good performance throughout the entire lifespan of new energy vehicle batteries. They are not prone to aging or damage due to corrosion, which helps to extend the overall lifespan of the battery and reduce usage costs.

[0017] Third, the forming of the second recess solves the problem of deformation of the outer peripheral sidewall caused by the stamping of the first recess on the high-hardness battery top cover. This makes the outer peripheral sidewall flat, improving the welding efficiency when the edge of the battery casing is inserted into the first recess and avoiding poor welding of the battery top cover at the opening of the battery casing. It also solves the problem of poor welding between the battery top cover and the aluminum casing due to unevenness. Attached Figure Description

[0018] Figure 1 This is a full sectional view of the top cover of a high-hardness battery.

[0019] Figure 2 This is a schematic diagram of the structure of the top cover plate of a high-hardness battery (I).

[0020] Figure 3 This is a schematic diagram of the structure of the top cover plate of a high-hardness battery (II).

[0021] Figure 4 This is a schematic diagram of the structure of the top cover plate of a high-hardness battery (III).

[0022] Figure 5 This is a cross-sectional view of the location of a terminal mounting hole on the top cover of a high-hardness battery.

[0023] Among them, 1. Cover plate body; 10. Horizontal surface; 11. First recess; 12. Outer peripheral sidewall; 13. Step body; 14. Chamfer; 15. Second recess; 16. Inner recessed buckle; 17. Protrusion; 18. Pole post mounting hole; 19. Outer surface. Detailed Implementation

[0024] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model, and the specific and direct descriptions of related structures are merely for the convenience of understanding the present utility model; the specific features do not necessarily or directly limit the scope of implementation of the present utility model. Conventional choices and substitutions made by those skilled in the art under the guidance of the present utility model should all be considered within the scope of protection claimed by this utility model.

[0025] Example:

[0026] like Figures 1-4As shown, the high-hardness battery top cover described in this embodiment includes a cover body 1, which is a thin metal sheet with a hardness of 80 HV or higher. The thin metal sheet with a hardness of 80 HV or higher is a stainless steel sheet or a titanium sheet, preferably a titanium sheet. The thickness of the stainless steel sheet or titanium sheet is generally between 0.5mm and 1.5mm, and is generally preferred to be 0.8mm and 1.0mm. "HV" refers to Vickers hardness.

[0027] The outer circumferential portion of the cover plate body 1 is stamped to form continuous or spaced first recesses 11, so that the outer circumferential portion of the cover plate body 1 forms an outer peripheral sidewall 12 located within the first recesses 11 and a step body 13 located at one end of the outer peripheral sidewall 12. The formation of the first recesses 11 on the cover plate body 1 makes the battery top cover structure easily adaptable to the corresponding battery casing. Therefore, when the battery top cover is welded to the opening of the battery casing, the portion of the cover plate body 1 with the outer peripheral sidewall 12 is inserted into the opening of the battery casing, so that the outer peripheral sidewall 12 is in close contact with the inner wall of the opening of the battery casing, and the inner wall of the step body 13 is in close contact with the edge surface of the opening of the battery casing. Then, the inner wall of the step body 13 and the edge surface of the opening of the battery casing are welded together to fix them to each other.

[0028] The horizontal surface 10 of the cover plate body 1 is stamped to form continuous or spaced second recesses 15, so as to flatten the outer peripheral sidewall 12. The outer peripheral sidewall 12 is perpendicular to the horizontal surface 10 of the cover plate body 1. The second recess 15 is adjacent to and corresponding to the outer peripheral sidewall 12 in the first recess 11. This improves the welding efficiency when the edge of the battery casing is inserted into the first recess 11 and welding is performed, avoiding the occurrence of poor welding of the battery top cover at the opening of the battery casing.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, the horizontal surface 10 of the cover plate body 1 is stamped with a continuously arranged chamfer 14, and the chamfer 14 is located between the outer peripheral sidewall 12 and the second recess 15, so that the other end of the outer peripheral sidewall 12 is connected to the chamfer 14. The chamfer 14 can be rounded or beveled depending on the actual situation, preferably beveled. The forming of the chamfer 14 makes it easier for the part of the battery top cover plate with the outer peripheral sidewall 12 to be inserted into the opening of the battery casing, thereby playing a guiding role during insertion. The size range of the chamfer 14 is 15%-25% of the thickness of the cover plate body 1, preferably 20% of the thickness of the cover plate body 1.

[0030] In this embodiment, as Figure 2 and Figure 3As shown, the first recess 11 or the second recess 15 or the step body 13 is continuously formed along the outer shape of the cover plate body 1, so that one of them is a ring structure. The outer shape of the cover plate body 1 can be selected as a rectangle, square or circle according to the actual situation. The ring structure makes stamping more convenient and easier to form.

[0031] In this embodiment, as Figure 4 As shown, the cross-section of the second recess 15 is an isosceles trapezoidal structure or an isosceles triangle structure. The formation of this structure makes the outer peripheral sidewall 12 more effectively flattened, improving the reliability of product forming. The depth of the second recess 15 is 10%-45% of the thickness of the cover plate body 1, preferably 25% of the thickness of the cover plate body 1.

[0032] In this embodiment, as Figure 4 and Figure 5 As shown, a plurality of recessed snap positions 16 are formed on the horizontal surface 10 of the cover plate body 1. The cover plate body 1 is punched to form pole mounting holes 18. Since the recessed snap positions 16 are generally set on the side of the pole mounting holes 18, when the lower plastic is attached to the horizontal surface 10 of the cover plate body 1, each positioning post on the lower plastic is inserted into the plurality of recessed snap positions 16, and then each positioning post is fixed in the recessed snap positions 16 by heat fusion.

[0033] Furthermore, a protrusion 17 is formed on the outer surface 19 of the cover plate body 1 on the side opposite to the horizontal surface 10, which is coaxially arranged with the recessed buckle 16. The recessed buckle 16 and the protrusion 17 are generally circular, but can also be square depending on the actual situation. The outer surface 19 of the cover plate body 1 is parallel to the horizontal surface 10.

[0034] In this embodiment, as Figure 1 As shown, the step body 13 is arranged perpendicularly to the outer peripheral sidewall 12 so that the step body 13 has a horizontal structure. The inner wall of the step body 13 and the outer peripheral sidewall 12 are connected perpendicularly to each other, thereby making the fit with the opening structure of the battery casing higher.

Claims

1. A high-hardness battery top cover, characterized in that, The cover plate includes a cover plate body (1), which is a thin metal sheet with a hardness of 80 HV or higher. The outer circumferential part of the cover plate body (1) is stamped to form a first recess (11) that is continuously or intermittently arranged, so that an outer peripheral sidewall (12) located in the first recess (11) and a step body (13) located at one end of the outer peripheral sidewall (12) are formed on the outer circumferential sidewall (10) of the cover plate body (1). The horizontal surface (10) of the cover plate body (1) is stamped to form a second recess (15) that is continuously or intermittently arranged. The second recess (15) is adjacent to the outer peripheral sidewall (12) in the first recess (11). The outer peripheral sidewall (12) is perpendicular to the horizontal surface (10) of the cover plate body (1). The thin metal sheet with a hardness of 80 HV or higher is a stainless steel plate or a titanium plate.

2. The high-hardness battery top cover plate according to claim 1, characterized in that, The horizontal surface (10) edge of the cover plate body (1) is stamped with a continuously arranged chamfer (14), and the chamfer (14) is located between the outer peripheral sidewall (12) and the second recess (15) so that the other end of the outer peripheral sidewall (12) is connected to the chamfer (14), and the chamfer (14) is a rounded corner or a beveled corner.

3. The high-hardness battery top cover plate according to claim 1, characterized in that, The first recess (11) or the second recess (15) or the step (13) is continuously formed along the shape of the cover plate body (1) so that one of them is a ring structure. The cover plate body (1) is rectangular, square or circular in shape.

4. A high-hardness battery top cover plate according to claim 1, characterized in that, The second recess (15) has an isosceles trapezoidal structure or an isosceles triangle structure.

5. A high-hardness battery top cover plate according to claim 1 or 4, characterized in that, The step body (13) is arranged perpendicularly to the outer peripheral sidewall (12) so that the step body (13) has a horizontal structure.

6. A high-hardness battery top cover plate according to claim 1, characterized in that, Multiple recessed snap positions (16) are formed on the horizontal surface (10) of the cover plate body (1).

7. A high-hardness battery top cover plate according to claim 1, characterized in that, The step body (13) is arranged perpendicularly to the outer peripheral sidewall (12) so that the step body (13) has a horizontal structure and the inner wall of the step body (13) and the outer peripheral sidewall (12) are connected perpendicularly to each other.

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