Battery structure assembly and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery structure assembly and a battery, the battery structure assembly comprises a riveting block and a pole, a riveting through hole is formed in the riveting block, an annular groove is formed in the end face, deviating from the interior of the battery, of the riveting block, and the annular groove is arranged on the outer side of the riveting through hole in a surrounding mode. The pole is inserted into the riveting through hole, the pole is welded with the riveting block, and a welding area is positioned on the inner side of the annular groove. The annular groove is favorable for blocking peripheral warping deformation caused by welding shrinkage of the riveting block, namely the deformation mainly occurs in the area on the inner side of the annular groove of the riveting block, and the annular groove is also favorable for blocking welding heat transfer, so that the area, located on the outer side of the annular groove, of the riveting block is prevented from thermal deformation. The battery comprises a shell and the battery structure assembly, the cover plate of the battery structure assembly is located at the opening of the shell, and the cover plate is connected to the shell in a sealed mode to form a shell of the battery. According to the battery, the overall height and the flatness of the pole assembly can meet the requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to a battery structure component and a battery. Background Art

[0002] There are various ways to secure battery terminals to the cover plate. One method involves using a rivet block, which inserts the terminal through a rivet hole in the block and then rivets the terminal to the block. To further secure the terminal and the rivet block, the two are typically welded together. This welding process causes the rivet block to shrink toward the rivet hole, causing the sides of the rivet block to warp away from the battery interior. This can cause the overall height of the terminal assembly to exceed the upper limit and the flatness to not meet the required dimensions. Utility Model Content

[0003] One purpose of the present utility model is to provide a battery structure assembly that can help the overall height and flatness of the pole assembly meet requirements.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A battery structure assembly is provided, comprising:

[0006] A riveting block, wherein a riveting through hole is formed on the riveting block, and an annular groove is formed on the end surface of the riveting block facing away from the interior of the battery, and the annular groove is arranged around the outside of the riveting through hole;

[0007] A pole is inserted into the riveted through hole, the pole is welded to the riveted block, and the welding area is located inside the annular groove.

[0008] Optionally, the depth h of the annular groove satisfies 0.2 mm ≤ h ≤ 0.8 mm.

[0009] Optionally, the depth h of the annular groove is 0.5 mm.

[0010] Optionally, a radial dimension k of the annular groove satisfies 0.2 mm ≤ k ≤ 0.8 mm.

[0011] Optionally, the radial dimension k of the annular groove is 0.5 mm.

[0012] Optionally, the annular groove is a circular ring structure.

[0013] Optionally, the riveted through hole is a circular structure, and the annular groove is coaxially arranged with the riveted through hole.

[0014] Optionally, a step surface is provided on the inner wall of the riveted through hole, and the riveted deformed portion of the pole abuts against the step surface.

[0015] Optionally, the end surface of the rivet block facing away from the interior of the battery is flush with the end surface of the pole.

[0016] Another object of the present invention is to provide a battery that can help the overall height and flatness of the pole assembly meet requirements.

[0017] To achieve this purpose, the present invention adopts the following technical solutions:

[0018] A battery is provided, comprising a shell and the above-mentioned battery structure assembly, wherein a cover plate of the battery structure assembly is located at an opening of the shell, and the cover plate is sealed to the shell to form an outer shell of the battery.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a battery structure assembly, including a rivet block and a pole, a rivet through-hole is provided on the rivet block, an annular groove is provided on the end face of the rivet block facing away from the interior of the battery, and the annular groove is arranged around the outside of the rivet through-hole. The pole is inserted into the rivet through-hole, and the pole is welded to the rivet block, and the welding area is located on the inner side of the annular groove. The annular groove is conducive to blocking the surrounding warping deformation caused by the welding shrinkage of the rivet block, that is, the deformation mainly occurs in the area where the rivet block is located on the inner side of the annular groove, and the annular groove is also conducive to blocking the transfer of welding heat, avoiding thermal deformation of the area where the rivet block is located on the outer side of the annular groove. Therefore, the battery structure assembly helps to reduce the warping height, that is, it can help to ensure that the overall height of the pole assembly, that is, the pole and the rivet block, does not exceed the required range due to warping, and helps to ensure that the flatness of the pole assembly meets the requirements.

[0021] The utility model also provides a battery comprising a housing and the aforementioned battery structure assembly, wherein a cover plate of the battery structure assembly is located at an opening of the housing and is sealed to the housing to form a battery outer shell. The battery can help the overall height and flatness of the terminal assembly meet requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a battery structure assembly provided by an embodiment of the present utility model;

[0023] Figure 2 It is a partial enlarged view of the battery structure assembly provided by the embodiment of the present utility model;

[0024] Figure 3 This is a partial exploded view of a battery structure assembly provided by an embodiment of the present utility model;

[0025] Figure 4 It is a partial cross-sectional view of a battery structure assembly provided by an embodiment of the present utility model.

[0026] In the picture:

[0027] 1. Riveting block; 11. Riveting through hole; 12. Annular groove; 13. Welding area; 14. Step surface;

[0028] 2. Pole;

[0029] 3. Upper plastic; 4. Sealing ring; 5. Lower plastic; 6. Cover. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention, and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] There are various ways to secure battery terminals to the cover plate. One method involves using a rivet block, which inserts the terminal through a rivet hole in the block and then rivets the terminal to the block. To further secure the terminal and the rivet block, the two are typically welded together. This welding process causes the rivet block to shrink toward the rivet hole, causing the sides of the rivet block to warp away from the battery interior. This can cause the overall height of the terminal assembly to exceed the upper limit and the flatness to not meet the required dimensions.

[0034] Therefore, this embodiment provides a battery structure assembly to solve the above-mentioned problem, and the battery structure assembly can help the overall height and flatness of the pole assembly meet the requirements.

[0035] like Figures 1-4 As shown, the battery structure assembly of this embodiment includes a rivet block 1 and a terminal 2. The rivet block 1 has a rivet through-hole 11. An annular groove 12 is formed on the end surface of the rivet block 1 facing away from the interior of the battery. The annular groove 12 is arranged outside the rivet through-hole 11. The terminal 2 is inserted into the rivet through-hole 11 and welded to the rivet block 1. The welding area 13 is located inside the annular groove 12.

[0036] The annular groove 12 helps prevent warping deformation of the surrounding area caused by welding shrinkage of the riveted block 1. That is, deformation mainly occurs in the area of ​​the riveted block 1 located inside the annular groove 12. The annular groove 12 also helps block the transfer of welding heat, preventing thermal deformation of the area of ​​the riveted block 1 located outside the annular groove 12. Therefore, this battery structural assembly helps reduce the warping height, that is, it helps ensure that the overall height of the terminal assembly, namely the terminal 2 and the riveted block 1, does not exceed the required range due to warping, and helps ensure that the flatness of the terminal assembly meets the requirements.

[0037] Optionally, the depth h of the annular groove 12 satisfies 0.2 mm ≤ h ≤ 0.8 mm. A depth h of the annular groove 12 that is too small will affect the deformation blocking effect. The maximum depth h of the annular groove 12 is limited by the thickness of the riveted block 1. If the depth h of the annular groove 12 is too high as a proportion of the thickness of the riveted block 1, it will affect the structural strength of the riveted block 1 and may cause cracks in the annular groove 12. Preferably, the depth h of the annular groove 12 is 0.5 mm, which can ensure the deformation blocking effect without affecting the structural strength of the riveted block 1.

[0038] Optionally, the radial dimension k of the annular groove 12 satisfies 0.2 mm ≤ k ≤ 0.8 mm. The radial dimension k of the annular groove 12 is the radial distance between the inner and outer sidewalls of the annular groove 12. An excessively large radial dimension of the annular groove 12 will affect the surface area of ​​the upper end face of the rivet block 1, while an excessively small radial dimension of the annular groove 12 will make machining difficult. Preferably, the radial dimension k of the annular groove 12 is 0.5 mm.

[0039] Optionally, the annular groove 12 is a circular ring structure, and the inner ring side wall and the outer ring side wall are concentric, and the radial distance between the two is consistent at all locations.

[0040] Optionally, the riveted through-hole 11 is circular, and the annular groove 12 is coaxially arranged with the riveted through-hole 11. In this embodiment, the welding area 13 is located at the junction of the terminal 2 and the riveted block 1, and on the end surfaces of both facing away from the interior of the battery. Therefore, the shape of the welding area 13 is consistent with the shape of the riveted through-hole 11 and is also circular. The annular groove 12 is also configured as a circular ring structure and is coaxially arranged with the riveted through-hole 11. This ensures that deformation of the inner area of ​​the annular groove 12 is more uniform along the circumference, avoiding excessive deformation stress in any particular area.

[0041] Optionally, a step surface 14 is provided on the inner wall of the riveted through hole 11, and the riveted deformed portion of the pole 2 abuts against the step surface 14. Optionally, the end face of the riveted block 1 facing away from the interior of the battery is flush with the end face of the pole 2 to ensure flatness.

[0042] Optionally, the battery structure assembly further includes a cover plate 6, an upper plastic 3, a sealing ring 4 and a lower plastic 5. The pole 2 is passed through the assembly through-hole of the cover plate 6, and the connecting portion of the pole 2 is located on the side of the cover plate 6 facing the interior of the battery, and the connecting portion is used to connect the battery cell tab. An inner plastic is provided on the side of the cover plate 6 facing away from the interior of the battery, and the inner plastic is clamped between the cover plate 6 and the rivet block 1 to ensure insulation between the two. The sealing ring 4 is sleeved on the pole 2 and clamped between the pole 2 and the inner wall of the assembly through-hole of the cover plate 6 to ensure insulation between the pole 2 and the cover plate 6. The outer plastic is attached to the side of the cover plate 6 facing the interior of the battery, and is partially clamped between the connecting portion and the cover plate 6 to further ensure insulation between the pole 2 and the cover plate 6.

[0043] Optionally, in this embodiment, both the positive electrode post and the negative electrode post are disposed on the cover plate 6, and the rivet blocks 1 at the positive electrode post and the negative electrode post are each provided with an annular groove 12. Of course, in other embodiments, only the positive electrode post or the negative electrode post may be disposed on the cover plate 6, or the electrode post assembly including the electrode post 2 and the rivet block 1 may be disposed on the housing, without limitation herein.

[0044] This embodiment also provides a battery comprising a housing and the aforementioned battery structure assembly. A cover plate 6 of the battery structure assembly is located at the opening of the housing and is sealed to the housing to form the battery housing. The battery cells are disposed within the housing. In this embodiment, the battery is a prismatic battery; however, in other embodiments, the battery may also be a cylindrical battery. This battery can help ensure that the overall height and flatness of the terminal assembly meet the requirements.

[0045] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery structure assembly, characterized in that: include: A riveting block (1), wherein a riveting through hole (11) is provided on the riveting block (1), an annular groove (12) is provided on the end surface of the riveting block (1) facing away from the interior of the battery, and the annular groove (12) is arranged around the outside of the riveting through hole (11); A pole (2) is inserted into the riveting through hole (11), the pole (2) is welded to the riveting block (1), and the welding area (13) is located inside the annular groove (12).

2. The battery structure assembly according to claim 1, characterized in that: The depth h of the annular groove (12) satisfies 0.2 mm ≤ h ≤ 0.8 mm.

3. The battery structure assembly according to claim 2, characterized in that: The depth h of the annular groove (12) is 0.5 mm.

4. The battery structure assembly according to claim 1, characterized in that: The radial dimension k of the annular groove (12) satisfies 0.2 mm ≤ k ≤ 0.8 mm.

5. The battery structure assembly according to claim 4, characterized in that: The radial dimension k of the annular groove (12) is 0.5 mm.

6. The battery structure assembly according to any one of claims 1 to 5, characterized in that: The annular groove (12) is a circular ring structure.

7. The battery structure assembly according to claim 6, characterized in that: The riveted through hole (11) is a circular structure, and the annular groove (12) is coaxially arranged with the riveted through hole (11).

8. The battery structure assembly according to any one of claims 1 to 5, characterized in that: A step surface (14) is provided on the inner wall of the riveted through hole (11), and the riveted deformed portion of the pole (2) abuts against the step surface (14).

9. The battery structure assembly according to any one of claims 1 to 5, characterized in that: The end surface of the riveting block (1) facing away from the interior of the battery is flush with the end surface of the pole (2).

10. A battery, characterized in that The battery structure assembly comprises a shell and a battery structure assembly according to any one of claims 1 to 9, wherein a cover plate (6) of the battery structure assembly is located at an opening of the shell, and the cover plate (6) is sealed to the shell to form an outer shell of the battery.

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