Sealing structure between storage battery pole and cover plate

Abstract

The utility model relates to a sealing structure between a storage battery pole and a cover plate. A through hole for the pole to penetrate through is vertically formed in the cover plate. The outer wall of the lower end of the pole is provided with a flange, and the pole is sleeved with a lower sealing ring which is pressed on the flange and the cover plate; a counter bore is coaxially formed in the upper end of the through hole, and an upper sealing ring, a clamping ring and a pressing ring are sequentially arranged in the counter bore from bottom to top; the inner ring of the clamping ring is clamped in an annular groove formed in the outer wall of the pole, and a preset interval is formed between the outer wall of the clamping ring and the inner wall of the counter bore; a fixed connection structure is arranged between the outer wall of the hold-down ring and the inner wall of the counter bore, and a preset interval is formed between the inner wall of the hold-down ring and the outer wall of the pole; the upper sealing ring is compressed between the bottom face of the clamping ring and the bottom face of the counter bore, and the inner ring surface of the upper sealing ring is attached to the outer wall of the pole. According to the scheme, the pole has moving spaces in the axial direction and the radial direction, the sealing effect between the pole and the cover plate can be guaranteed through the upper sealing ring and the lower sealing ring when the pole moves, and electrolyte leakage is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of the connection structure of battery poles of a storage battery, and particularly relates to a sealing structure between a pole of a storage battery and a cover plate. Background Art

[0002] In a lead-acid storage battery, positive and negative poles are usually connected to an electrical device through terminals. The poles usually penetrate through the cover plate of the storage battery housing. In order to prevent the electrolyte in the storage battery from leaking, a sealing structure is usually provided between the pole and the cover plate. The commonly used sealing structures at present include:

[0003] A sealing structure formed by injecting adhesives such as epoxy resin and polyurethane glue into the contact part between the pole and the cover plate; there is also a sealing structure in which the pole is fixedly connected to the cover plate by brazing. The above sealing structures will form a fixed connection structure between the pole and the cover plate. Once the pole is bumped, it is easy to cause cracks in the sealed part, resulting in electrolyte leakage. Content of the Utility Model

[0004] To solve the deficiencies of the prior art, the utility model provides a sealing structure between a pole of a storage battery and a cover plate. The pole has a moving space both axially and radially, and when the pole moves, the upper sealing ring and the lower sealing ring can be used to ensure the sealing effect between the pole and the cover plate, preventing electrolyte leakage.

[0005] To achieve the purpose of the utility model, the following scheme is proposed:

[0006] A sealing structure between a pole of a storage battery and a cover plate, wherein a through hole is vertically opened on the cover plate, and the inside thereof is used for penetrating the pole.

[0007] There is a predetermined interval between the outer wall of the pole and the inner wall of the through hole;

[0008] A flange is provided on the outer wall at the lower end of the pole, and a lower sealing ring is sleeved on the pole, and it is pressed between the top surface of the flange and the bottom surface of the cover plate;

[0009] A counterbore coaxially arranged is provided at the upper end of the through hole. An upper sealing ring, a snap ring and a pressing ring are sequentially arranged in the counterbore from bottom to top; wherein, the inner ring of the snap ring is clamped in an annular groove opened on the outer wall of the pole, and there is a predetermined interval between the outer wall of the snap ring and the inner wall of the counterbore; the outer wall of the pressing ring is fixedly connected to the inner wall of the counterbore, and there is a predetermined interval between the inner wall of the pressing ring and the outer wall of the pole; the upper sealing ring is compressed between the bottom surface of the snap ring and the bottom surface of the counterbore, and the inner ring surface of the upper sealing ring fits with the outer wall of the pole.

[0010] The beneficial effects of the present utility model are as follows: At least two sealing contacts are formed between the terminal post and the cover plate by using the upper sealing ring and the lower sealing ring to ensure a good sealing effect. Moreover, by utilizing the compression performance of the upper sealing ring and the lower sealing ring, the sealing effect can be effectively ensured even when the terminal post moves radially and axially, avoiding the leakage of electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are only for illustrating the selected embodiments, not all possible implementation schemes, and are not intended to limit the scope of the present utility model.

[0012] Figure 1 A partial cross-sectional view showing the connection part between the terminal post and the cover plate of the present application is shown.

[0013] Figure 2 A structural schematic diagram of the snap ring and the pressing ring is shown.

[0014] Reference numerals in the figures: cover plate - 1, through hole - 11, counterbore - 12, terminal post - 2, flange - 21, annular groove - 22, lower sealing ring - 3, upper sealing ring - 4, snap ring - 5, pressing ring - 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will describe the embodiments of the present utility model in detail with reference to the drawings. However, the embodiments described herein are only a part of the embodiments of the present utility model, not all of the embodiments.

[0016] As Figure 1 , Figure 2 shown, for a sealing structure between a battery terminal post and a cover plate, a through hole 11 is vertically formed on the cover plate 1, and the terminal post 2 is used to pass through its interior.

[0017] There is a predetermined gap between the outer wall of the terminal post 2 and the inner wall of the through hole 11.

[0018] A flange 21 is provided on the outer wall of the lower end of the terminal post 2, and a lower sealing ring 3 is sleeved on the terminal post 2, which is pressed between the top surface of the flange 21 and the bottom surface of the cover plate 1, and the end face sealing structure is used to prevent the electrolyte from entering between the terminal post 2 and the through hole 11.

[0019] The upper end of the through hole 11 has a counterbore 12 arranged coaxially. An upper sealing ring 4, a snap ring 5 and a pressing ring 6 are successively arranged in the counterbore 12 from bottom to top. Among them, the inner ring of the snap ring 5 is clamped in the annular groove 22 formed on the outer wall of the pole column 2, and there is a predetermined interval between the outer wall of the snap ring 5 and the inner wall of the counterbore 12. The outer wall of the pressing ring 6 and the inner wall of the counterbore 12 are in a fixed connection structure. Specifically, after interference installation, glue bonding can be used. There is a predetermined interval between the inner wall of the pressing ring 6 and the outer wall of the pole column 2. The upper sealing ring 4 is compressed between the bottom surface of the snap ring 5 and the bottom surface of the counterbore 12 to prevent the electrolyte from flowing from the inside to the outside of the upper sealing ring 4, and the inner ring surface of the upper sealing ring 4 fits the outer wall of the pole column 2 to prevent the electrolyte from flowing upward.

[0020] This solution uses the lower sealing ring 3 and the upper sealing ring 4 to establish two sealing structures between the pole column 2 and the cover plate 1, which can effectively prevent electrolyte leakage. At the same time, the upper sealing ring 4 and the lower sealing ring 3 are respectively arranged on the upper and lower sides of the cover plate 1 and are restricted by the snap ring 5 and the flange 21 on the pole column 2. This not only keeps the upper sealing ring 4 and the lower sealing ring 3 in a compressed state at all times to ensure the sealing state, but also uses the compression amounts of the upper sealing ring 4 and the lower sealing ring 3 to provide a space for the pole column 2 to move relative to the cover plate 1 along the axial direction. Even when the pole column 2 is under pressure or tension, the sealing structure will not be damaged. Moreover, the interval between the pole column 2 and the through hole 11, the interval between the snap ring 5 and the counterbore 12, and the interval between the pole column 2 and the pressing ring 6 provide a space for the pole column 2 to swing radially. And when the pole column 2 swings, the upper sealing ring 4 and the lower sealing ring 3 can also ensure good sealing performance.

[0021] Preferably, as Figure 1 shown, a middle section of the outer wall of the lower sealing ring 3 is provided with an annular groove. This structure can ensure that its top surface and bottom surface have sufficient areas to contact the cover plate 1 and the flange 21, thus ensuring the sealing effect. At the same time, it can also increase the compression amount of the lower sealing ring 3 along the axial direction of the pole column 2, thereby providing a larger axial movement space for the cover plate 1.

[0022] Preferably, as Figure 1 shown, a middle section of the inner wall of the upper sealing ring 4 is provided with an annular groove. Two lips that fit the surface of the pole column 2 are formed on both sides of the inner ring of the upper sealing ring 4 corresponding to the annular groove. Two sealing structures are formed on the surface of the pole column 2 by using the two lips, so as to increase the sealing effect. And after the annular groove is opened, the upper sealing ring 4 has a larger compression amount along the axial direction, thereby providing a larger axial movement space for the cover plate 1.

[0023] Preferably, when the upper sealing ring 4 is pressed, its outer wall contacts the inner wall of the counterbore 12. When the upper sealing ring 4 is in its natural state, there is a predetermined gap between its outer wall and the inner wall of the counterbore 12, thereby providing sufficient compression space for the upper sealing ring 4. After being pressed and contacting the inner wall of the counterbore 12, the upper sealing ring 4 can buffer and support the pole column 2 when the pole column 2 swings, avoiding hard contact between the side wall of the pole column 2 and the inner wall of the through hole 11, thereby preventing damage to the pole column.

[0024] Preferably, as Figure 1 shown, the outer wall of the pressing ring 6 is threadedly connected to the inner wall of the counterbore 12.

[0025] Further preferably, as Figure 1 shown, the outer wall of the upper end of the pressing ring 6 is a hexagonal structure for connecting a wrench to facilitate rotation of the pressing ring 6.

[0026] The above are only the preferred embodiments of the present invention and do not represent the only or limit the present invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention all fall within the scope of protection of the present invention.

Claims

1. A sealing structure between a battery pole and a cover plate, wherein a through hole (11) is vertically opened on the cover plate (1), and the inside of the through hole is used to pass the pole (2), characterized in that ； There is a predetermined gap between the outer wall of the pole (2) and the inner wall of the through hole (11); The outer wall of the lower end of the pole (2) is provided with a flange (21), and the pole (2) is sleeved with a lower sealing ring (3) which is pressed tightly between the top surface of the flange (21) and the bottom surface of the cover plate (1); The upper end of the through hole (11) has a coaxially arranged countersunk hole (12), and an upper sealing ring (4), a clamping ring (5) and a clamping ring (6) are arranged in sequence from bottom to top in the countersunk hole (12); wherein the inner ring of the clamping ring (5) is clamped in an annular groove (22) provided on the outer wall of the pole (2), and a predetermined interval is provided between the outer wall of the clamping ring (5) and the inner wall of the countersunk hole (12); a fixed connection structure is formed between the outer wall of the clamping ring (6) and the inner wall of the countersunk hole (12), and a predetermined interval is provided between the inner wall of the clamping ring (6) and the outer wall of the pole (2); the upper sealing ring (4) is compressed between the bottom surface of the clamping ring (5) and the bottom surface of the countersunk hole (12), and the inner ring surface of the upper sealing ring (4) is in contact with the outer wall of the pole (2).

2. A sealing structure between a battery pole and a cover plate according to claim 1, characterized in that: An annular groove is provided in the middle section of the outer wall of the lower sealing ring (3).

3. A sealing structure between a battery pole and a cover plate according to claim 1, characterized in that: An annular groove is provided in the middle section of the inner wall of the upper sealing ring (4), and two lips are formed on both sides of the inner ring of the upper sealing ring (4) corresponding to the annular groove, which are in contact with the surface of the pole (2).

4. A sealing structure between a battery pole and a cover plate according to claim 1, characterized in that: When the upper sealing ring (4) is under pressure, its outer wall contacts the inner wall of the countersunk hole (12); when the upper sealing ring (4) is in a natural state, there is a predetermined gap between its outer wall and the inner wall of the countersunk hole (12).

5. The sealing structure between a battery pole and a cover plate according to claim 1, characterized in that: The outer wall of the clamping ring (6) and the inner wall of the counterbore (12) are threadedly connected.

6. A sealing structure between a battery pole and a cover plate according to claim 5, characterized in that: The outer wall of the upper end of the clamping ring (6) is a hexagonal structure.

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