Battery top cover and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a battery monomer. The battery top cover comprises a cover plate sheet, a connecting piece and a pole, wherein the cover plate sheet is provided with a first pole hole; and the connecting piece is positioned above the cover plate sheet and is provided with a second pole hole. The pole comprises an abutting part, a penetrating part and a flanging part, the abutting part abuts against the lower surface of the cover plate piece, the penetrating part is connected to the upper portion of the abutting part and penetrates through the first pole hole and the second pole hole, a mounting groove is formed in the upper surface of the penetrating part, the top of the side wall of the mounting groove is bent outwards to form the flanging part, and the lower surface of the flanging part abuts against the upper surface of the connecting piece. According to the battery top cover, a welding process between the pole and the connecting piece can be omitted, the pole and the connecting piece can be assembled only through riveting, the structural strength of the battery top cover is guaranteed, meanwhile, the technological process of pole assembly is simplified, the production efficiency is improved, and the manufacturing cost of the battery top cover is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover and a battery cell. Background Art

[0002] As an energy storage device, the battery is widely used in various fields, creating great economic benefits for society and being conducive to environmental protection and emission reduction. For power batteries, in addition to key components such as battery cells and BMS, the battery housing structure is also an important factor in its safety. Among them, the pole column is an important part of the battery. In addition to being used to connect to the positive and negative electrodes of the battery cells inside the battery for conduction, it also needs to have corresponding structural strength.

[0003] Currently, when assembling the pole column of the battery, the riveting aluminum block is usually provided with a riveting hole adapted to the pole column, and a circle of riveting protrusions corresponding to the riveting hole is provided on the surface of the pole column body. After the pole column is riveted and fixed through the cooperation of the riveting hole of the riveting aluminum block and the riveting protrusion, the pole column and the riveting aluminum block are then welded and fixed, with a complex process and high cost.

[0004] Therefore, there is an urgent need for a battery top cover and a battery cell to solve the above problems. Summary of the Utility Model

[0005] An object of the utility model is to provide a battery top cover that can realize the assembly of the pole column and the cover plate only through riveting, simplify the assembly process of the battery top cover, and reduce the production cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provide a battery top cover, including:

[0008] A cover plate, the cover plate is provided with a first pole column hole;

[0009] A connecting piece, the connecting piece is located above the cover plate, and the connecting piece is provided with a second pole column hole;

[0010] A pole column, the pole column includes an abutting portion, a penetrating portion and a flanging portion. The abutting portion abuts against the lower surface of the cover plate. The penetrating portion is connected above the abutting portion and penetrates through the first pole column hole and the second pole column hole. An installation groove is provided on the upper surface of the penetrating portion, and the top of the side wall of the installation groove is bent outward to form the flanging portion. The lower surface of the flanging portion abuts against the upper surface of the connecting piece.

[0011] As an optional solution of the battery top cover, the pole column includes a main body portion and a protective layer. The protective layer is coated on the outer surface of the main body portion. The main body portion is made of copper material, and the protective layer is made of nickel material layer.

[0012] As an alternative solution for the battery top cover, the thickness of the protective layer is 1 to 10 micrometers.

[0013] As an alternative solution for the battery top cover, a stepped structure is further provided at the bottom of the through portion. The stepped structure passes through the first pole hole, and the connecting member is clamped between the top surface of the stepped structure and the flanging portion.

[0014] As an alternative solution for the battery top cover, the connecting member is further provided with a flanging groove. The flanging groove is provided on the upper surface of the connecting member. The flanging groove is used to accommodate the flanging portion, and the thickness of the flanging portion is less than or equal to the depth of the flanging groove.

[0015] As an alternative solution for the battery top cover, the battery top cover further includes an upper insulating member. The upper insulating member is sleeved on the through portion, and the upper insulating member is located between the cover plate and the connecting member.

[0016] As an alternative solution for the battery top cover, the battery top cover further includes a lower insulating member. The lower insulating member is sleeved on the through portion, and the lower insulating member is located between the cover plate and the abutting portion.

[0017] As an alternative solution for the battery top cover, the battery top cover further includes a sealing ring. The sealing ring is provided between the through portion and the inner wall of the first pole hole.

[0018] As an alternative solution for the battery top cover, the installation groove is a tapered groove, and the cross-sectional area of the installation groove gradually decreases from top to bottom.

[0019] Another object of the present invention is to provide a battery cell with simple assembly process and low production cost.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] Provide a battery cell, including an electric core, a housing, and the above-mentioned battery top cover. The electric core is disposed in the housing, and the battery top cover is hermetically connected to the opening of the housing.

[0022] The beneficial effects of the present invention:

[0023] The present utility model provides a battery top cover. The pole post includes an abutting portion, a penetrating portion, and a flanging portion. The penetrating portion sequentially penetrates through a first pole post hole and a second pole post hole from bottom to top, such that the upper surface of the abutting portion abuts against the lower surface of the cover plate. An installation groove is provided at the top of the penetrating portion. Align the middle protrusion of the flanging riveting needle above the installation groove, and drive the flanging riveting needle to move towards the penetrating portion through a riveting machine. After the middle of the flanging riveting needle enters the installation groove, it extrudes the side wall of the installation groove outwards, causing the side wall of the installation groove to bend outwards to form a flanging portion. Stop the movement of the flanging riveting needle until the lower surface of the flanging portion tightly abuts against the upper surface of the connecting piece, thus completing the assembly of the pole post, the cover plate, and the connecting piece. This battery top cover eliminates the welding process between the pole post and the connecting piece, and can achieve the assembly of the pole post only through riveting. While ensuring the structural strength of the battery top cover, it simplifies the process flow of assembling the pole post, improves production efficiency, and reduces the manufacturing cost of the battery top cover.

[0024] The present utility model also provides a battery cell, including a battery core, a housing, and the above-mentioned battery top cover. This battery cell simplifies the assembly process of the battery top cover, reduces the manufacturing cost, and improves production efficiency. Description of the Drawings

[0025] Figure 1 is a partial cross-sectional view of the battery top cover provided by the present utility model;

[0026] Figure 2 is a schematic structural diagram of the assembled battery top cover provided by the present utility model;

[0027] Figure 3 is a schematic structural diagram of the battery top cover before assembly provided by the present utility model.

[0028] In the figure:

[0029] 1. Cover plate; 11. First pole post hole;

[0030] 2. Connecting piece; 21. Second pole post hole; 22. Flanging groove;

[0031] 3. Pole post; 31. Abutting portion; 32. Penetrating portion; 321. Installation groove; 322. Step structure; 33. Flanging portion;

[0032] 4. Upper insulating part;

[0033] 5. Lower insulating part;

[0034] 6. Sealing ring;

[0035] 100. Flanging riveting needle; 110. Protrusion part; 120. Groove. Detailed Embodiments

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Such as Figures 1 to 2As shown in the figure, the battery top cover of this embodiment includes a cover plate 1, a connecting member 2, and a terminal post 3. The cover plate 1 is provided with a first terminal post hole 11. The connecting member 2 is located above the cover plate 1. Optionally, a limiting groove is provided on the upper surface of the cover plate 1, and the connecting member 2 is limited in the limiting groove, which is convenient for positioning the connecting member 2. The connecting member 2 is provided with a second terminal post hole 21, and the second terminal post hole 21 is correspondingly arranged with the first terminal post hole 11. The terminal post 3 includes an abutting portion 31, a penetrating portion 32, and a flanging portion 33. The abutting portion 31 abuts against the lower surface of the cover plate 1. The penetrating portion 32 is connected above the abutting portion 31 and penetrates through the first terminal post hole 11 and the second terminal post hole 21. An installation groove 321 is provided on the upper surface of the penetrating portion 32. The top of the side wall of the installation groove 321 bends outward to form the flanging portion 33, and the lower surface of the flanging portion 33 abuts against the upper surface of the connecting member 2.

[0041] For the battery top cover provided in this embodiment, the terminal post 3 includes an abutting portion 31, a penetrating portion 32, and a flanging portion 33. The penetrating portion 32 sequentially penetrates through the first terminal post hole 11 and the second terminal post hole 21 from bottom to top, so that the upper surface of the abutting portion 31 abuts against the lower surface of the cover plate 1. An installation groove 321 is provided at the top of the penetrating portion 32. When assembling the terminal post 3, as Figure 3 shown in the figure, the convex portion 110 of the flanging riveting needle 100 is aligned above the installation groove 321. The flanging riveting needle 100 is driven by a riveting machine to move towards the penetrating portion 32. After the convex portion 110 enters the installation groove 321, it extrudes the side wall of the installation groove 321 outward, so that the side wall of the installation groove 321 bends outward to form the flanging portion 33. As the flanging riveting needle 100 continues to squeeze, the flanging portion 33 extends into the groove 120 and presses against the connecting member 2 along the inner wall of the groove 120 until the lower surface of the flanging portion 33 tightly abuts against the upper surface of the connecting member 2, then the movement of the flanging riveting needle 100 is stopped, and the assembly of the terminal post 3 with the cover plate 1 and the connecting member 2 is completed, realizing the tight engagement between the terminal post 3 and the connecting member 2. This battery top cover cancels the welding step between the terminal post 3 and the connecting member 2, and the assembly of the terminal post 3 can be realized only by riveting. While ensuring the structural strength of the battery top cover, the process flow of assembling the terminal post 3 is simplified, the production efficiency is improved, and the manufacturing cost of the battery top cover is reduced.

[0042] Optionally, the installation groove 321 is a tapered groove, and the cross-sectional area of the installation groove 321 gradually decreases from top to bottom. Such a setting can expand the opening of the installation groove 321, which is convenient for positioning and aligning the flanging riveting needle 100 with the installation groove 321. At the same time, the thickness of the side wall of the installation groove 321 gradually increases from top to bottom, strengthening the structural strength of the side wall of the installation groove 321 and preventing fracture when being squeezed by the flanging riveting needle 100. Of course, the installation groove 321 can also be set as a square groove or the like.

[0043] Further, a stepped structure 322 is also provided at the bottom of the penetrating portion 32. The stepped structure 322 penetrates through the first pole hole 11, and the connecting member 2 is clamped between the top surface of the stepped structure 322 and the flanging portion 33, further enhancing the clamping effect of the pole 3 on the connecting member 2 and ensuring the stable connection between the pole 3 and the connecting member 2.

[0044] Optionally, the connecting member 2 is further provided with a flanging groove 22. The flanging groove 22 is provided on the upper surface of the connecting member 2 and is used to accommodate the flanging portion 33. The thickness of the flanging portion 33 is less than or equal to the depth of the flanging groove 22. Such a setting can prevent the upper surface of the flanging portion 33 from protruding above the upper surface of the connecting member 2 and ensure the neatness of the overall structure of the battery top cover.

[0045] It should be noted that generally, the pole 3 includes a copper material portion and an aluminum material portion. When manufacturing the pole 3, friction welding is required to connect the copper material portion and the aluminum material portion, making the manufacturing process of the pole 3 relatively complex and not conducive to improving production efficiency. In the battery top cover proposed in this embodiment, the pole 3 includes a main body portion and a protective layer. The protective layer is coated on the outer surface of the main body portion. The main body portion is made of copper material, and the protective layer is made of a nickel material layer. Changing the pole 3 formed by welding copper material and aluminum material in the prior art to a main body portion made only of copper material can eliminate the friction welding process, simplify the process flow of manufacturing the pole 3, and since the resistivity of copper material is lower than that of aluminum material, it can improve the conductive effect of the pole and reduce the power loss of the pole 3. Coating the outer surface of the main body portion with a protective layer of nickel material can prevent the oxidation of the pole 3 and improve the service life of the pole 3.

[0046] Optionally, the thickness of the protective layer is 1 μm - 10 μm, which can not only control the production cost but also ensure a good protective effect. Exemplarily, the thickness of the protective layer can be set to 1 μm, 2 μm, 5 μm, 8 μm or 10 μm, etc.

[0047] Further, the battery top cover further includes an upper insulating member 4. The upper insulating member 4 is sleeved on the penetrating portion 32, and the upper insulating member 4 is located between the cover plate 1 and the connecting member 2 to achieve insulation between the cover plate 1 and the connecting member 2.

[0048] Further, the battery top cover further includes a lower insulating member 5. The lower insulating member 5 is sleeved on the penetrating portion 32, and the lower insulating member 5 is located between the cover plate 1 and the abutting portion 31, thereby achieving insulation between the cover plate 1 and the abutting portion 31.

[0049] Further, the battery top cover further includes a sealing ring 6. The sealing ring 6 is provided between the penetrating portion 32 and the inner wall of the first pole hole 11 to ensure the sealed connection between the pole 3 and the cover plate 1.

[0050] This embodiment also provides a battery cell, which includes a battery core, a housing, and the above-mentioned battery top cover. The battery core is disposed in the housing, and the battery top cover is sealingly connected to the opening of the housing. This battery cell simplifies the assembly process of the battery top cover, reduces the manufacturing cost, and can improve the production efficiency.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery top cover, characterized in that, Comprising: A cover plate (1), the cover plate (1) being provided with a first pole hole (11); A connecting member (2), the connecting member (2) being located above the cover plate (1), the connecting member (2) being provided with a second pole hole (21); A pole (3), the pole (3) including an abutting portion (31), a penetrating portion (32) and a flanging portion (33), the abutting portion (31) abutting against the lower surface of the cover plate (1), the penetrating portion (32) being connected above the abutting portion (31) and penetrating through the first pole hole (11) and the second pole hole (21), an installation groove (321) being provided on the upper surface of the penetrating portion (32), the top of the side wall of the installation groove (321) being bent outward to form the flanging portion (33), the lower surface of the flanging portion (33) abutting against the upper surface of the connecting member (2).

2. The battery top cover according to claim 1, wherein The pole (3) includes a main body portion and a protective layer, the protective layer covering the outer surface of the main body portion, the main body portion being made of copper material, and the protective layer being a nickel material layer.

3. The battery top cover according to claim 2, characterized in that, The thickness of the protective layer is 1 to 10 micrometers.

4. The battery top cover according to claim 1, characterized in that, A step structure (322) is further provided at the bottom of the penetrating portion (32), the step structure (322) penetrating through the first pole hole (11), and the connecting member (2) being clamped between the top surface of the step structure (322) and the flanging portion (33).

5. The battery top cover according to claim 1, characterized in that, The connecting member (2) is further provided with a flanging groove (22), the flanging groove (22) being provided on the upper surface of the connecting member (2), the flanging groove (22) being used to accommodate the flanging portion (33), and the thickness of the flanging portion (33) being less than or equal to the depth of the flanging groove (22).

6. The battery top cover according to claim 1, wherein The battery top cover further includes an upper insulating member (4), the upper insulating member (4) being sleeved on the penetrating portion (32), and the upper insulating member (4) being located between the cover plate (1) and the connecting member (2).

7. The battery top cover according to claim 1, wherein The battery top cover further includes a lower insulating member (5), the lower insulating member (5) being sleeved on the penetrating portion (32), and the lower insulating member (5) being located between the cover plate (1) and the abutting portion (31).

8. The battery top cover according to claim 1, wherein The battery top cover further includes a sealing ring (6), the sealing ring (6) being provided between the penetrating portion (32) and the inner wall of the first pole hole (11).

9. The battery top cover according to claim 1, characterized in that The installation groove (321) is a tapered groove, and the cross-sectional area of the installation groove (321) gradually decreases from top to bottom.

10. A battery cell, characterized in that, Comprising an electric core, a housing and the battery top cover according to any one of claims 1-9, the electric core being disposed in the housing, and the battery top cover being hermetically connected to the opening of the housing.

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