Top cover structure and battery

Abstract

This utility model relates to the field of energy storage equipment technology, and more particularly to a top cover structure and a battery. The top cover structure includes a cover plate, terminals, and a sealing ring. The cover plate has mounting holes, and the terminals are inserted into these holes. The sealing ring is fitted onto the terminals and sandwiched between the terminals and the cover plate. The sealing ring is made of potting compound to bond the terminals and cover plate together for sealing. The sealing ring of this top cover structure is made of potting compound, which utilizes the adhesiveness of the potting compound to achieve a seal between the terminals and the cover plate. This eliminates the problem of compression rebound and avoids issues such as uneven compression and localized seal failure. Therefore, this top cover structure has higher sealing performance. The battery includes a casing and the aforementioned top cover structure. The top cover structure covers the opening of the casing to form the battery's outer shell. This battery's top cover structure has good sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a top cover structure and a battery. Background Technology

[0002] To ensure the sealing performance of the battery's top cover structure, a sealing ring is usually installed at the terminal post. Current sealing rings are mostly made of fluororubber, utilizing its compressibility to achieve a seal. However, in high and low temperatures and in irregularly shaped structures, the compressibility of fluororubber is affected by temperature rise and structural changes, leading to phenomena such as rebound and uneven sealing compression, causing seal failure. Utility Model Content

[0003] One objective of this invention is to provide a top cover structure that ensures sealing performance.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A top cover structure is provided, comprising:

[0006] A cover plate, wherein an assembly hole is provided on the cover plate;

[0007] A terminal post, wherein the terminal post portion is inserted into the assembly hole;

[0008] A sealing ring is fitted onto the electrode post and sandwiched between the electrode post and the cover plate. The sealing ring is made of potting compound to bond the electrode post and the cover plate together to achieve a seal.

[0009] Optionally, the sealing ring is made of silicone, epoxy resin or polyurethane.

[0010] Optionally, the terminal post has a first annular end face facing the inside of the battery, the cover plate has a first end face facing the outside of the battery, and the sealing ring is sandwiched between the first annular end face and the first end face.

[0011] Optionally, a first annular groove is formed on the first annular end face, and a second annular groove is formed on the first end face.

[0012] Optionally, the first end face is not provided with a covering portion corresponding to the sealing ring. The covering portion is provided around the assembly hole. The covering portion partially covers the side wall of the electrode post, and the covering portion partially abuts against the second annular end face of the electrode post facing the outside of the battery.

[0013] Optionally, it further includes a first insulating member, which is sleeved on the pole post and at least partially sandwiched between the pole post and the covering portion.

[0014] Optionally, the second end face of the electrode protrudes from the cover portion towards the outside of the battery.

[0015] Optionally, it may also include a second insulating element, which is at least partially located between the pole and the wall of the mounting hole.

[0016] Another objective of this invention is to provide a battery that can ensure the sealing performance of the top cover structure.

[0017] To achieve this objective, the present invention adopts the following technical solution:

[0018] A battery is provided, including a housing and the aforementioned top cover structure, the top cover structure covering an opening in the housing to form the outer casing of the battery.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a top cover structure, including a cover plate, an electrode post, and a sealing ring. The cover plate has an assembly hole into which the electrode post is inserted. The sealing ring is fitted onto the electrode post and sandwiched between the electrode post and the cover plate. The sealing ring is made of potting compound to bond the electrode post and the cover plate together for a seal. Because the sealing ring in this top cover structure is made of potting compound, the adhesive properties of the potting compound achieve a seal between the electrode post and the cover plate, eliminating the problem of compression rebound and thus avoiding issues such as uneven compression and localized seal failure. Therefore, this top cover structure has higher sealing performance.

[0021] This utility model also provides a battery, including a casing and the aforementioned top cover structure, the top cover structure being disposed over the opening of the casing to form the battery casing. The top cover structure of this battery has good sealing performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the top cover structure provided in this embodiment of the utility model;

[0023] Figure 2 This is an exploded view of the top cover structure provided in this embodiment of the utility model;

[0024] Figure 3 This is a cross-sectional view of the top cover structure provided in this embodiment of the utility model;

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the pole provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Cover plate; 11. Assembly hole; 12. First end face; 121. Second annular groove; 13. Covering part; 131. Pressing end; 132. Covering side wall;

[0029] 2. Pole post; 21. First annular end face; 211. First annular groove; 22. Second end face; 23. Second annular end face;

[0030] 3. Sealing ring; 4. First insulating component;

[0031] 5. Second insulating component; 51. Annular protrusion; 6. Explosion-proof component. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1-5 As shown, the top cover structure of this embodiment includes a cover plate 1, an electrode post 2, and a sealing ring 3. The cover plate 1 has an assembly hole 11, and the electrode post 2 is partially inserted into the assembly hole 11. The sealing ring 3 is sleeved on the electrode post 2 and sandwiched between the electrode post 2 and the cover plate 1. The sealing ring 3 is made of potting compound to bond the electrode post 2 and the cover plate 1 together, thus achieving a seal.

[0036] The sealing ring 3 of this top cover structure is made of potting compound, which utilizes the adhesiveness of the potting compound to achieve a seal between the pole 2 and the cover plate 1. There is no issue of compression rebound, thus avoiding problems such as uneven compression and localized seal failure. Therefore, this top cover structure has higher sealing performance. Furthermore, the potting compound is resistant to high and low temperatures and electrolyte corrosion, ensuring sealing performance even in high-temperature, low-temperature, and electrolyte environments.

[0037] Optionally, the sealing ring 3 is made of silicone, epoxy resin, or polyurethane. Optionally, the sealing ring 3 is applied between the electrode post 2 and the cover plate 1 and then extruded to ensure that the potting compound fills the sealing space between the electrode post 2 and the cover plate 1.

[0038] Optionally, the electrode post 2 has a first annular end face 21 facing the inside of the battery, and the cover plate 1 has a first end face 12 facing the outside of the battery. The sealing ring 3 is sandwiched between the first annular end face 21 and the first end face 12. Optionally, the electrode post 2 includes a main body and a limiting part. One end of the main body along the axial direction of the electrode post 2 passes through the mounting hole 11 of the cover plate 1 and is electrically connected to the electrode assembly. The other end is located outside the battery and is electrically connected to the outside. The limiting part is arranged around the side wall of the main body, and the first annular end face 21 is the end face of the limiting part facing the inside of the battery. Since the first annular end face 21 is in contact with the first end face 12, the first end face 12 can restrict the movement of the electrode post 2 toward the inside of the battery.

[0039] Since the shape of the sealing ring 3 is directly related to the shape of the contacting surfaces, it is possible that, for example... Figure 5 As shown, a first annular groove 211 is formed on the first annular end face 21, so that a first limiting protrusion is formed on the surface of the sealing ring 3 facing the pole post 2. A second annular groove 121 is formed on the first end face 12, so that a second limiting protrusion is formed on the surface of the sealing ring 3 facing the cover plate 1. Optionally, two second annular grooves 121 are formed at intervals on the first end face 12, with one second annular groove 121 located in the area enclosed by the other second annular groove 121. Correspondingly, two second limiting protrusions are formed on the surface of the sealing ring 3 facing the cover plate 1. Both second limiting protrusions are annular, and one is located in the area enclosed by the other. The concave-convex fit between the sealing ring 3 and the pole post 2 and the cover plate 1 can further increase the contact area between the sealing ring 3 and the pole post 2, and between the sealing ring 3 and the cover plate 1, further improving the bonding area and improving the sealing performance of the sealing ring 3.

[0040] Optionally, a covering portion 13 is provided on the first end face 12 at the location not corresponding to the sealing ring 3. The covering portion 13 surrounds the assembly hole 11, partially covering the sidewall of the terminal post 2, and partially pressing against the second annular end face 23 of the terminal post 2 facing outwards from the battery. The covering portion 13 includes a pressing end 131 and a covering sidewall 132. The covering sidewall 132 circumferentially covers the sidewall of the terminal post 2, and the pressing end 131 presses against the second annular end face 23 of the terminal post 2 facing outwards from the battery. The second annular end face 23 is located on the side of the limiting portion facing outwards from the battery. The covering portion 13 can restrict the movement of the terminal post 2 outwards from the battery. Combined with the limiting of the terminal post 2 by the first end face 12, it can ensure that the terminal post 2 cannot move along its own axial direction, and the covering sidewall 132 of the covering portion 13 can further prevent the terminal post 2 from moving radially.

[0041] To ensure insulation between the terminal post 2 and the cover plate 1, the top cover structure may optionally include a first insulating member 4, which is sleeved on the terminal post 2 and at least partially sandwiched between the terminal post 2 and the covering portion 13. Optionally, in this embodiment, the limiting portion of the terminal post 2 is further provided with a multi-layered annular stepped surface facing the outside of the battery, and the first insulating member 4 covers the sidewall of the limiting portion of the terminal post 2.

[0042] Optionally, the electrode post 2 is provided with a second end face 22 facing the outside of the battery protruding from the covering portion 13 so as to facilitate electrical connection between the electrode post 2 and the outside.

[0043] Optionally, the top cover structure further includes a second insulating member 5, which is at least partially located between the terminal post 2 and the wall of the mounting hole 11. The second insulating member 5 is attached to the end face of the cover plate 1 facing the inside of the battery, and the annular protrusion 51 of the second insulating member 5 is located between the main body of the terminal post 2 and the wall of the mounting hole 11 to form insulation protection at this location and prevent short circuit between the terminal post 2 and the cover plate 1. In this embodiment, the terminal post 2, the cover plate 1, the first insulating member 4, and the second insulating member 5 together form a sealed space, and the potting compound fills the sealed space to form a sealing ring 3.

[0044] Optionally, the top cover structure also includes an explosion-proof component 6, which is disposed at the explosion-proof through hole of the cover plate 1.

[0045] This embodiment also provides a battery, including a casing and the aforementioned top cover structure. The top cover structure covers the opening of the casing to form the battery casing. The top cover structure of this battery has good sealing performance.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A roof structure, characterized in that include: Cover plate (1), wherein an assembly hole (11) is provided on the cover plate (1); The pole (2) is partially inserted into the assembly hole (11); A sealing ring (3) is fitted on the pole post (2) and sandwiched between the pole post (2) and the cover plate (1). The material of the sealing ring (3) is potting compound so that the sealing ring (3) adheres to the pole post (2) and the cover plate (1) to achieve a seal.

2. The roof structure of claim 1, wherein, The sealing ring (3) is made of silicone, epoxy resin or polyurethane.

3. The roof structure of claim 1, wherein, The pole (2) has a first annular end face (21) facing the inside of the battery, the cover plate (1) has a first end face (12) facing the outside of the battery, and the sealing ring (3) is sandwiched between the first annular end face (21) and the first end face (12).

4. The roof structure of claim 3, wherein, A first annular groove (211) is provided on the first annular end face (21), and a second annular groove (121) is provided on the first end face (12).

5. A roof construction according to any of claims 3-4, c h a r a c t e r i s e d i n that The first end face (12) is provided with a covering part (13) corresponding to the sealing ring (3). The covering part (13) is provided around the assembly hole (11). The covering part (13) partially covers the side wall of the pole post (2), and the covering part (13) partially presses against the second annular end face (23) of the pole post (2) facing the outside of the battery.

6. The roof structure of claim 5, wherein, It also includes a first insulating element (4), which is sleeved on the pole post (2) and is at least partially sandwiched between the pole post (2) and the covering part (13).

7. The roof structure of claim 5, wherein, The pole post (2) is provided to protrude from the cover portion (13) on the second end face (22) facing the outside of the battery.

8. The top cover structure according to any one of claims 1-4, characterized in that, It also includes a second insulating element (5), which is at least partially located between the pole post (2) and the wall of the mounting hole (11).

9. A battery characterized by It includes a housing and a top cover structure as described in any one of claims 1-8, the top cover structure covering the opening of the housing to form the outer casing of the battery.

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