Cover plate structure and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a cover plate structure and a battery, the cover plate structure comprises a top cover, a pole post, a sealing ring and a support ring, the pole post penetrates through a through hole of the top cover, a bottom plate of the pole post is positioned on one side of the top cover facing the inside of the battery, the sealing ring and the support ring are both coaxially arranged and sleeved on the pole post, and the support ring is arranged on the top cover. The sealing ring comprises a first annular part, the first annular part is clamped between the bottom plate and the end face, facing the interior of the battery, of the top cover, the supporting ring comprises a second annular part, the second annular part is clamped between the sealing ring and the end face, deviating from the interior of the battery, of the bottom plate, and the second annular part is made of metal. The battery comprises a shell and the cover plate structure, the top cover is located at the opening of the shell, and the top cover is in sealed connection with the shell to form a shell of the battery. The battery can prevent the sealing ring from deforming or tilting, and the air tightness of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially, relates to a cover plate structure and battery. BACKGROUND

[0002] The cover plate structure generally includes a pole and a top cover, and further includes a sealing ring and other sealing and insulating components. The sealing ring is sleeved on the pole and partially clamped between the inner wall of the through hole of the pole and the top cover to ensure that the gap between the pole and the top cover is blocked and the sealing performance of the battery is ensured. However, due to the difference in the bending shape of the pole, the sealing ring compressed in the shell is prone to deformation or warping, resulting in unstable air tightness of the battery. SUMMARY

[0003] One object of the utility model is to provide a cover plate structure that can prevent the sealing ring from deforming or warping and ensure the air tightness of the battery.

[0004] To achieve this object, the utility model adopts the following technical solutions:

[0005] A cover plate structure is provided, which includes a top cover, a pole, a sealing ring, and a support ring. The pole is inserted into the through hole of the top cover, and the bottom plate of the pole is located on the side of the top cover facing the inside of the battery. The sealing ring and the support ring are coaxially arranged with the pole and sleeved on the pole. The sealing ring includes a first annular part, which is clamped between the bottom plate and the end face of the top cover facing the inside of the battery. The support ring includes a second annular part, which is clamped between the sealing ring and the end face of the bottom plate facing away from the inside of the battery. The material of the second annular part is metal.

[0006] Optionally, the support ring further includes a first tubular part connected to the second annular part. The first tubular part is coaxially arranged with the pole and sleeved on the pole.

[0007] Optionally, a limiting groove is formed in the circumferential wall of the pole, and the first tubular part is located in the limiting groove.

[0008] Optionally, the material of the second annular part is stainless steel.

[0009] And / or, the material of the first tubular part is stainless steel.

[0010] Optionally, the end of the first tubular part facing the inside of the battery is connected to the second annular part.

[0011] Optionally, the thickness a of the first tubular part is in the range of 0.3mm-0.4mm.

[0012] And / or, the first tubular part has a length b along its own axial direction in a range of 0.85mm-1mm.

[0013] Optionally, the second annular part has a thickness c in a range of 0.3mm-0.4mm.

[0014] And / or, the second annular part has a difference d between its outer diameter and inner diameter in a range of 3.15mm-4mm.

[0015] And / or, the outer diameter of the second annular part is larger than that of the first annular part, and the inner diameter of the first annular part is larger than that of the second annular part.

[0016] Optionally, the sealing ring further comprises a second tubular part connected to the first annular part, the second tubular part is sleeved on the pole, and the second tubular part is partially clamped between the pole and the inner wall of the through hole.

[0017] Optionally, the side wall of the pole is circumferentially provided with a stepped surface facing the inside of the battery, and the end surface of the second tubular part away from the first annular part abuts against the stepped surface.

[0018] Another purpose of the utility model is to provide a battery which can prevent the sealing ring from deforming or lifting and ensure the air tightness of the battery.

[0019] To achieve the purpose, the utility model adopts the following technical scheme:

[0020] The utility model provides a battery which comprises a shell and the cover plate structure, the top cover is located at the opening of the shell, and the top cover is in sealing connection with the shell to form the shell of the battery.

[0021] The utility model has the advantages of:

[0022] The utility model provides a cover plate structure which comprises a top cover, a pole, a sealing ring and a supporting ring, the pole is arranged in the through hole of the top cover, the bottom plate of the pole is located at the side of the top cover facing the inside of the battery, the sealing ring and the supporting ring are coaxially arranged with the pole and are sleeved on the pole, the sealing ring comprises a first annular part, the first annular part is clamped between the bottom plate and the end surface of the top cover facing the inside of the battery, the supporting ring comprises a second annular part, the second annular part is clamped between the sealing ring and the end surface of the bottom plate away from the inside of the battery, and the second annular part is made of metal. The second annular part made of metal can support the first annular part of the sealing ring, when the bending shapes of the bottom plates of different poles are different, the second annular part of the supporting ring between the sealing ring and the bottom plate can prevent the sealing ring from deforming or lifting directly due to the influence of the pole, so that the air tightness of the battery can be ensured.

[0023] The utility model also provides a battery, including casing and the cover plate structure above, top cap is located the opening of casing, and top cap is sealedly connected with casing, to form the shell of battery. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of battery provided by the utility model embodiment;

[0025] Figure 2 It is the sectional view of battery provided by the utility model embodiment;

[0026] Figure 3 It is Figure 2 The enlarged view of A in

[0027] In the drawing,

[0028] 1, top cap;2, pole;21, bottom plate;22, step face;23, riveting portion;

[0029] 3, sealing ring;31, first annular portion;32, second tubular portion;

[0030] 4, support ring;41, second annular portion;42, first tubular portion;

[0031] 5, upper plastic;6, lower plastic;

[0032] 100, cover plate structure;200, casing. DETAILED DESCRIPTION

[0033] The technical scheme of the utility model will be further explained in connection with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings, not all.

[0034] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, also can be detachable connection, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] 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.

[0036] like Figures 1-3 As shown, the cover structure 100 of this embodiment includes a top cover 1, a terminal post 2, a sealing ring 3, and a support ring 4. The terminal post 2 passes through the through hole of the top cover 1. The bottom plate 21 of the terminal post 2 is located on the side of the top cover 1 facing the inside of the battery. The sealing ring 3 and the support ring 4 are both coaxially arranged with the terminal post 2 and sleeved on the terminal post 2. The sealing ring 3 includes a first annular portion 31, which is sandwiched between the bottom plate 21 and the end face of the top cover 1 facing the inside of the battery. The support ring 4 includes a second annular portion 41, which is sandwiched between the sealing ring 3 and the end face of the bottom plate 21 facing away from the inside of the battery. The material of the second annular portion 41 is metal. The second annular portion 41 made of metal can provide support for the first annular portion 31 of the sealing ring 3. When the bending shape of the base plate 21 of different pole posts 2 is different, the second annular portion 41 of the support ring 4 between the sealing ring 3 and the base plate 21 can prevent the sealing ring 3 from being directly affected by the pole post 2 and deformed or lifted, thereby ensuring the airtightness of the battery.

[0037] Optionally, the support ring 4 further includes a first tubular portion 42, which is connected to the second annular portion 41. The first tubular portion 42 is coaxially arranged with the pole post 2 and sleeved on the pole post 2. Optionally, the inner wall of the first tubular portion 42 is aligned with the inner ring wall of the second annular portion 41, that is, the overall cross-section of the support ring 4 is L-shaped. The first tubular portion 42 can restrict the second annular portion 41 to a certain extent, preventing the second annular portion 41 from tilting, which helps to ensure that the plate surface of the second annular portion 41 is perpendicular to the axial direction of the pole post 2.

[0038] Optionally, a limiting groove is provided circumferentially on the side wall of the pole post 2, and the first tubular part 42 is located in the limiting groove, which can prevent the support ring 4 from moving along the axial direction of the pole post 2. The position of the limiting groove plays a limiting role for the support ring 4.

[0039] Optionally, in this embodiment, the second annular portion 41 is made of stainless steel. Optionally, the first tubular portion 42 is also made of stainless steel, that is, the entire support ring 4 is made of stainless steel. More preferably, the support ring 4 is made of SUS stainless steel. Stainless steel not only has high structural strength, but also does not react or corrode when in contact with electrolyte, thus ensuring its service life. In other embodiments, the support ring 4 may also be made of other electrolyte-resistant metals, which will not be elaborated here.

[0040] Optionally, in this embodiment, the end of the first tubular portion 42 facing the inside of the battery is connected to the second annular portion 41, that is, the first tubular portion 42 is closer to the outside of the battery than the second annular portion 41. In other embodiments, the first tubular portion 42 may also be disposed around the base plate 21 of the terminal post 2, that is, closer to the inside of the battery than the second annular portion 41, and the first tubular portion 42 is connected to the middle of the first annular portion 31.

[0041] Optionally, the thickness 'a' of the first tubular portion 42 can be in the range of 0.3mm-0.4mm. If it is too thin, the structural strength will be insufficient; if it is too thick, it will affect the compressible space of the sealing ring 3.

[0042] Optionally, the length b of the first tubular portion 42 along its own axial direction ranges from 0.85mm to 1mm. In this embodiment, the length of the first tubular portion 42 along its own axial direction is smaller than the length of the sealing ring 3 along its axial direction, as long as it serves to limit the second annular portion 41.

[0043] Optionally, the thickness c of the second annular portion 41 can be in the range of 0.3mm-0.4mm. Similarly, if it is too thin, the structural strength will be insufficient, and if it is too thick, it will affect the compressible space of the sealing ring 3.

[0044] Optionally, the difference d between the outer diameter and the inner diameter of the second annular portion 41 is in the range of 3.15mm-4mm, and the radial dimension of the second annular portion 41 is large enough to ensure its structural strength.

[0045] Optionally, the outer diameter of the second annular portion 41 is larger than the outer diameter of the first annular portion 31, and the inner diameter of the first annular portion 31 is larger than the inner diameter of the second annular portion 41, that is, the second annular portion 41 completely covers the first annular portion 31 so as to provide support for all positions of the first annular portion 31.

[0046] Optionally, the sealing ring 3 further includes a second tubular portion 32, which is connected to the first annular portion 31. The second tubular portion 32 is sleeved on the pole post 2, and part of the second tubular portion 32 is sandwiched between the pole post 2 and the inner wall of the through hole.

[0047] Optionally, the side wall of the pole post 2 is provided with a stepped surface 22, which faces the inside of the battery. The end face of the second tubular portion 32 away from the first annular portion 31 abuts against the stepped surface 22 to form a seal.

[0048] Optionally, the cover structure 100 further includes an upper plastic 5 and a lower plastic 6. The upper plastic 5 is sandwiched between the riveting part 23 of the pole post 2 and the top cover 1. The lower plastic 6 is laid on the end face of the top cover 1 facing the inside of the battery, and the inner wall of the opening of the lower plastic 6 is aligned with the outer ring of the first annular part 31 of the sealing ring 3. The second annular part 41 of the support ring 4 partially compresses the lower plastic 6 to ensure that the lower plastic 6 and the top cover 1 are firmly connected at this point.

[0049] This embodiment also provides a battery, including a housing 200 and the aforementioned cover structure 100. A top cover 1 is located at the opening of the housing 200 and is sealed to the housing 200 to form the battery casing. The battery cell is disposed inside the casing. Optionally, the battery can be a cylindrical battery or a prismatic battery, and there is no limitation herein.

[0050] This battery can prevent the sealing ring 3 from deforming or lifting, ensuring the airtightness of the battery.

[0051] 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 cover structure, characterized by The application relates to a battery pole structure, which comprises a top cover (1), a pole (2), a sealing ring (3) and a supporting ring (4), the pole (2) is arranged in a through hole of the top cover (1), a bottom plate (21) of the pole (2) is located on a side of the top cover (1) facing the inside of a battery, the sealing ring (3) and the supporting ring (4) are coaxially arranged on the pole (2), the sealing ring (3) comprises a first annular part (31), the first annular part (31) is arranged between the bottom plate (21) and an end face of the top cover (1) facing the inside of the battery, the supporting ring (4) comprises a second annular part (41), the second annular part (41) is arranged between the sealing ring (3) and an end face of the bottom plate (21) away from the inside of the battery, and the second annular part (41) is made of metal.

2. The cover plate structure according to claim 1, wherein The supporting ring (4) further comprises a first tubular part (42), the first tubular part (42) is connected to the second annular part (41), and the first tubular part (42) is coaxially arranged on the pole (2).

3. The cover plate structure according to claim 2, wherein A limiting groove is formed in the side wall of the pole (2) in the circumferential direction, and the first tubular part (42) is located in the limiting groove.

4. The cover plate structure according to claim 2, wherein The second annular part (41) is made of stainless steel. The first tubular part (42) is made of stainless steel.

5. The cover plate structure according to claim 2, wherein An end of the first tubular part (42) facing the inside of the battery is connected to the second annular part (41).

6. The cover plate structure according to claim 2, wherein The thickness a of the first tubular part (42) is 0.3-0.4 mm. The length b of the first tubular part (42) along the axial direction of the first tubular part (42) is 0.85-1 mm.

7. The cover structure according to any one of claims 1 to 6, characterized in that The thickness c of the second annular part (41) is 0.3-0.4 mm. The difference d between the outer diameter and the inner diameter of the second annular part (41) is 3.15-4 mm. The outer diameter of the second annular part (41) is larger than that of the first annular part (31), and the inner diameter of the first annular part (31) is larger than that of the second annular part (41).

8. The cover structure according to any one of claims 1 to 6, characterized in that The sealing ring (3) further comprises a second tubular part (32), the second tubular part (32) is connected to the first annular part (31), the second tubular part (32) is arranged on the pole (2), and the second tubular part (32) is partially arranged between the pole (2) and the inner wall of the through hole.

9. The cover plate structure according to claim 8, wherein A stepped surface (22) is arranged on the side wall of the pole (2) in the circumferential direction, the stepped surface (22) faces the inside of the battery, and an end face of the second tubular part (32) away from the first annular part (31) abuts against the stepped surface (22).

10. A battery characterized by The application further relates to a battery, which comprises a shell (200) and the cover plate structure as claimed in any one of claims 1-9, the top cover (1) is arranged at an opening of the shell (200), and the top cover (1) is sealingly connected to the shell (200) to form a shell of the battery.

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