Safety valve for double-sealed lead-acid storage battery

Abstract

The invention discloses a dual-seal safety valve for a lead-acid storage battery, and relates to the technical field of lead-acid storage batteries, the dual-seal safety valve comprises a battery cover, the top of the battery cover is sequentially provided with a first lower step surface, a second lower step surface and an internal thread surface from top to bottom; a first upper step surface, a second upper step surface and an external thread surface are sequentially arranged at the bottom of the valve body from top to bottom, the first upper step surface and the first lower step surface are arranged in a matched mode, the second upper step surface and the second lower step surface are arranged in a matched mode, a cavity is formed in the valve body, and an opening is formed in the top of the cavity; a valve cover; an acid filtering sheet; the outer sealing rubber ring is arranged between the first upper step surface and the first lower step surface in a sealing manner; and the inner sealing rubber ring is arranged between the second upper step surface and the second lower step surface in a sealing manner. The device can solve the problem of poor sealing effect caused by single sealing of the safety valve of the high-magnification lead-acid storage battery in the prior art, and ensures the reliability and safety of the lead-acid storage battery.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid batteries, and more particularly to a double-sealed safety valve for lead-acid batteries. Background Art

[0002] The safety valve is an important component of valve-regulated high-rate lead-acid batteries. Common safety valves generally have only one sealing rubber ring for sealing, which is a single sealing structure with poor sealing effect. During the installation of the safety valve or the use of the battery, the sealing rubber ring is often not compressed to the designed compression ratio or the sealing rubber ring is deformed or damaged, which reduces or fails the sealing effect of the safety valve, resulting in the overall sealing effect of the lead-acid battery being reduced or failed.

[0003] Moreover, when the overall sealing effect of the lead-acid battery is reduced or fails, the following effects will occur: 1. The safety valve is loose, and there is a gap between the valve body and the battery cover, causing the acid mist inside the lead-acid battery to overflow and cause the battery to lose water; 2. The safety valve cannot be opened and closed normally, and the pressure required for oxygen recombination inside the lead-acid battery cannot be guaranteed; 3. It causes problems such as leakage and crystallization at the safety valve mouth of the lead-acid battery. The above problems all affect the reliability and safety of high-rate lead-acid batteries.

[0004] In summary, how to solve the problem of poor sealing effect caused by the single seal of the high-rate lead-acid battery safety valve in the prior art and ensure the reliability and safety of the lead-acid battery is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a double-sealed safety valve for lead-acid batteries, which can solve the problem of poor sealing effect caused by the single seal of the high-rate lead-acid battery safety valve in the prior art, and ensure the reliability and safety of the lead-acid battery.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A double-sealed safety valve for a lead-acid battery, comprising:

[0008] A battery cover, which is used to cover the battery box, wherein the top of the battery cover is provided with a first lower step surface, a second lower step surface and an internal thread surface in sequence from top to bottom;

[0009] The valve body has a first upper step surface, a second upper step surface and an external threaded surface in sequence from top to bottom at its bottom, the first upper step surface and the first lower step surface are matched, the second upper step surface and the second lower step surface are matched, the external threaded surface and the internal threaded surface are threadedly connected, a cavity is provided inside the valve body, and an opening is provided at the top of the cavity;

[0010] A valve cover, used for covering the opening;

[0011] An acid filter sheet, which is arranged in the cavity and is used to prevent the acid mist flowing into the cavity from the battery from overflowing outward;

[0012] An outer sealing rubber ring, which is sealingly arranged between the first upper step surface and the first lower step surface;

[0013] An inner sealing rubber ring is sealingly arranged between the second upper step surface and the second lower step surface.

[0014] In one embodiment, the valve cover is mounted in the opening by ultrasonic welding.

[0015] In one embodiment, at least one exhaust hole is provided on the valve cover where it is assembled with the valve body.

[0016] In one embodiment, the acid filter plate includes an upper acid filter plate and a lower acid filter plate, the upper acid filter plate is horizontally arranged between the upper part of the cavity and the valve cover, and the lower acid filter plate is horizontally arranged at the lower part of the cavity.

[0017] In one embodiment, the valve body is provided with an assembly step on the joint side with the lower surface of the upper acid filter plate, and the valve cover is provided with a first boss on the joint side with the upper surface of the upper acid filter plate, so that a gap is left between the valve cover and the upper acid filter plate.

[0018] In one embodiment, a circular tube structure boss is provided in the valve body, and the circular tube structure boss is a conical structure that is thick at the bottom and thin at the top. At least one groove is provided on the top of the circular tube structure boss, and a rubber cap is provided on the outer periphery of the circular tube structure boss, and the rubber cap is located in the cavity.

[0019] In one embodiment, a cylindrical channel is provided in the circular tube structure boss, and the lower acid filter sheet is installed in the cylindrical channel by interference fit.

[0020] In one embodiment, the volume of the inner sealing rubber ring is larger than the volume of the gap formed between the valve body and the battery cover.

[0021] In one embodiment, a valve port sealing line is provided on the joint side between the battery cover and the lower surface of the inner sealing rubber ring.

[0022] In one embodiment, the outer diameter of the valve body is greater than the outer diameter of the outer sealing rubber ring.

[0023] When using the double-sealed lead-acid battery safety valve provided by the present invention, first, the battery cover can be used to cover the lead-acid battery to protect the lead-acid battery. Then, the acid filter can be arranged in the cavity of the valve body, and the valve cover can be used to cover the opening of the valve body to prevent the acid mist flowing into the cavity from the battery from overflowing. Finally, the valve body and the battery cover are assembled so that the first upper step surface and the first lower step surface cooperate to clamp the outer sealing rubber ring, the second upper step surface and the second lower step surface cooperate to clamp the inner sealing rubber ring, and the outer threaded surface of the valve body and the inner threaded surface of the battery cover are threadedly connected. After the valve body and the battery cover are assembled in place, the inner sealing rubber ring and the outer sealing rubber ring play a sealing role at the same time, and have the function of double sealing, ensuring that the sealing effect of the lead-acid battery is good, effectively solving the problem of the single sealing structure and poor sealing effect of the previous battery safety valve, and improving the reliability and safety of high-rate lead-acid batteries.

[0024] In summary, the double-sealed lead-acid battery safety valve provided by the present invention can solve the problem of poor sealing effect caused by the single seal of the high-rate lead-acid battery safety valve in the prior art, thereby ensuring the reliability and safety of the lead-acid battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 This is a schematic structural diagram of a valve body of a double-sealed lead-acid battery safety valve provided by the present invention;

[0027] Figure 2 Schematic diagram of the appearance of the valve body;

[0028] Figure 3 The figure is a schematic diagram showing the connection between the valve body and the battery cover of a double-sealed lead-acid battery safety valve.

[0029] Figure 1-Figure 3 middle:

[0030] 1 is a valve cover, 11 is a first boss, 2 is an upper acid filter, 3 is a valve body, 31 is a first upper step surface, 32 is a second upper step surface, 33 is an external thread surface, 34 is an assembly step, 35 is a circular tube structure boss, 36 is a cylindrical channel, 4 is an external sealing rubber ring, 5 is an internal sealing rubber ring, 6 is a rubber cap, 7 is a lower acid filter, 8 is a battery cover, 81 is a first lower step surface, 82 is a second lower step surface, 83 is an internal thread surface, 84 is a valve port sealing line, and 9 is an exhaust hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The core of the present invention is to provide a double-sealed safety valve for lead-acid batteries, which can solve the problem of poor sealing effect caused by single sealing of high-rate lead-acid battery safety valves in the prior art, and ensure the reliability and safety of lead-acid batteries.

[0033] This specific embodiment provides a double-sealed lead-acid battery safety valve, please refer to Figure 3 , Figure 3 The figure is a connection diagram of the valve body and the battery cover of a double-sealed lead-acid battery safety valve. The double-sealed lead-acid battery safety valve includes:

[0034] The battery cover 8 is used to cover the battery box. The top of the battery cover 8 is provided with a first lower step surface 81, a second lower step surface 82 and an internal thread surface 83 from top to bottom;

[0035] The valve body 3 has a first upper step surface 31, a second upper step surface 32 and an external thread surface 33 on its bottom from top to bottom, the first upper step surface 31 and the first lower step surface 81 are matched, the second upper step surface 32 and the second lower step surface 82 are matched, the external thread surface 33 and the internal thread surface 83 are threadedly connected, a cavity is provided inside the valve body 3, and an opening is provided at the top of the cavity;

[0036] A valve cover 1, which is used to cover the opening;

[0037] An acid filter sheet is disposed in the cavity to prevent the acid mist flowing into the cavity from the battery from overflowing outward;

[0038] An outer sealing rubber ring 4, which is sealed between the first upper step surface 31 and the first lower step surface 81;

[0039] The inner sealing rubber ring 5 is sealingly disposed between the second upper step surface 32 and the second lower step surface 82 .

[0040] It should be noted that the battery cover 8 is an important component widely used in various devices, mainly used to protect the battery from damage by the external environment, and also convenient for users to replace the battery. The battery cover 8 has various materials to choose from, and the common ones are metal, plastic, fiberglass, etc. The present application provides an inner sealing rubber ring 5 and an outer sealing rubber ring 4 at the connection between the battery cover 8 and the valve body 3, which can effectively prevent the safety valve from loosening, and the valve body 3 and the battery cover 8 form a gap, causing the acid mist inside the lead-acid battery to overflow, causing the battery to lose water, etc.

[0041] In actual use, the shape, structure, size, material, position, etc. of the battery cover 8, valve body 3, valve cover 1, acid filter sheet, outer sealing rubber ring 4 and inner sealing rubber ring 5 can be determined according to actual conditions and actual needs.

[0042] When using the double-sealed lead-acid battery safety valve provided by the present invention, first, the battery cover 8 can be used to cover the lead-acid battery to protect the lead-acid battery. Then, the acid filter can be arranged in the cavity of the valve body 3, and the valve cover 1 can be used to cover the opening of the valve body 3 to prevent the acid mist flowing into the cavity from the battery from overflowing. Finally, the valve body 3 and the battery cover 8 are assembled so that the first upper step surface 31 and the first lower step surface 81 cooperate to clamp the outer sealing rubber ring 4, the second upper step surface 32 and the second lower step surface 82 cooperate to clamp the inner sealing rubber ring 5, and the outer thread surface 33 of the valve body 3 and the inner thread surface 83 of the battery cover 8 are threadedly connected. After the valve body 3 and the battery cover 8 are assembled in place, the inner sealing rubber ring 5 and the outer sealing rubber ring 4 play a sealing role at the same time, have the function of double sealing, ensure the good sealing effect of the lead-acid battery, effectively solve the problem of the single sealing structure and poor sealing effect of the previous battery safety valve, and improve the reliability and safety of the high-rate lead-acid battery.

[0043] In summary, the double-sealed lead-acid battery safety valve provided by the present invention can solve the problem of poor sealing effect caused by the single seal of the high-rate lead-acid battery safety valve in the prior art, thereby ensuring the reliability and safety of the lead-acid battery.

[0044] In one embodiment, the valve cover 1 is installed in the opening by ultrasonic welding. That is, the valve cover 1 is provided above the valve body 3, and the valve cover 1 can be ultrasonically welded at the opening of the valve body 3 to cover the opening to prevent the acid mist flowing into the cavity of the valve body 3 from the battery from overflowing.

[0045] In one embodiment, please refer to Figure 2 , which is a schematic diagram of the appearance of the valve body, the valve cover 1 is provided with at least one exhaust hole 9 at the position for matching and assembling with the valve body 3. For example, three exhaust holes 9 can be provided at equal intervals in the circumferential direction of the valve cover 1 to facilitate the exhaust of the gas in the valve body 3.

[0046] In one embodiment, the acid filter includes an upper acid filter 2 and a lower acid filter 7. The upper acid filter 2 is horizontally arranged between the upper part of the cavity and the valve cover 1, and the lower acid filter 7 is horizontally arranged at the lower part of the cavity, which effectively prevents the acid mist flowing into the valve body 3 from the battery from overflowing outward.

[0047] It should be noted that the acid filter sheet is a filter element for filtering acidic substances and is widely used in different fields. In batteries, the acid filter sheet can be used as an explosion-proof sheet to play a role in filtering and explosion-proofing. That is, the upper acid filter sheet 2 and the lower acid filter sheet 7 of the present application have the functions of filtering and explosion-proofing.

[0048] In one embodiment, please refer to Figure 1 , which is a schematic diagram of the structure of the valve body of the double-sealed lead-acid battery safety valve provided by the present invention, the valve body 3 is provided with an assembly step 34 on the joint side with the lower surface of the upper acid filter 2, wherein the assembly step 34 is used to limit the upper acid filter 2. The valve cover 1 is provided with a first boss 11 on the joint side with the upper surface of the upper acid filter 2, so that there is a gap between the valve cover 1 and the upper acid filter 2, so as to avoid direct contact between the valve cover 1 and the upper acid filter 2 and affect the normal use of the upper acid filter 2.

[0049] In one embodiment, a circular tube structure boss 35 is provided in the valve body 3. The circular tube structure boss 35 is a conical structure that is thick at the bottom and thin at the top. At least one groove is provided on the top of the circular tube structure boss 35. A rubber cap 6 is provided on the outer periphery of the circular tube structure boss 35, and the rubber cap 6 is located in the cavity.

[0050] It should be noted that a circular tube structure boss 35 with a thick bottom and a thin top is provided in the valve body 3, and a rubber cap 6 is installed on the upper part of the circular tube structure boss 35. The taper of the circular tube structure boss 35 needs to be set according to the opening and closing valve pressure value of the safety valve. At the same time, a number of grooves of a certain width are opened on the top plane of the circular tube structure boss 35 to ensure that the installed rubber cap 6 can be opened and closed normally under the set opening and closing valve pressure value, so as to avoid the safety valve being unable to open and close normally and being unable to provide the pressure required for oxygen recombination inside the lead-acid battery.

[0051] In one embodiment, a cylindrical channel 36 is provided in the cylindrical tube structure boss 35, and the lower acid filter sheet 7 is installed in the cylindrical channel 36 by interference fit. That is, the acid mist flowing from the battery into the cylindrical channel 36 of the cavity can be blocked by the lower acid filter sheet 7 to prevent the acid mist from overflowing.

[0052] In one embodiment, the volume of the inner sealing rubber ring 5 is larger than the volume of the gap formed between the valve body 3 and the battery cover 8, so that the inner sealing rubber ring 5 is fully squeezed and deformed by the valve body 3 and the battery cover 8, ensuring that the valve body 3 and the battery cover 8 are effectively sealed and connected by the inner sealing rubber ring 5.

[0053] In one embodiment, a valve port sealing line 84 is provided on the joint side between the battery cover 8 and the lower surface of the inner sealing rubber ring 5 to ensure that the compression ratio of the inner sealing rubber ring 5 meets the sealing requirements of the valve body 3 and the battery cover 8 .

[0054] In one embodiment, the outer diameter of the valve body 3 is greater than the outer diameter of the outer sealing rubber ring 4 to ensure effective sealing between the first upper step surface 31 and the first lower step surface 81 .

[0055] The present application can effectively solve the problem of poor sealing effect caused by a single seal of the safety valve of a high-rate lead-acid battery in the prior art by providing components such as an inner sealing rubber ring 5, an outer sealing rubber ring 4, a lower acid filter plate 7 and an upper acid filter plate 2, avoid problems such as leakage and crystallization at the safety valve port of the lead-acid battery, and effectively ensure the reliability and safety of the lead-acid battery.

[0056] It should be noted that the first upper step surface 31 and the first lower step surface 81, the second upper step surface 32 and the second lower step surface 82 mentioned in the present application document, where the first and the second are only used to distinguish the different positions, have no order of precedence.

[0057] In addition, it should be noted that the directions or positional relationships indicated by "up and down", "inside and outside", etc. in this application are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplifying the description and facilitating understanding, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0058] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. Any combination of all embodiments provided by the present invention is within the protection scope of this invention and will not be described in detail here.

[0059] The double-sealed safety valve for lead-acid batteries provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A double-sealed safety valve for lead-acid batteries, characterized in that: include: A battery cover (8) used for covering a battery box, wherein the top of the battery cover (8) is provided with a first lower step surface (81), a second lower step surface (82) and an internal thread surface (83) in sequence from top to bottom; A valve body (3), the bottom of which is provided with a first upper step surface (31), a second upper step surface (32) and an external threaded surface (33) in sequence from top to bottom, the first upper step surface (31) and the first lower step surface (81) are arranged in coordination, the second upper step surface (32) and the second lower step surface (82) are arranged in coordination, the external threaded surface (33) and the internal threaded surface (83) are threadedly connected, and a cavity is provided inside the valve body (3), and an opening is provided at the top of the cavity; A valve cover (1) for covering the opening; An acid filter sheet, which is arranged in the cavity and is used to prevent the acid mist flowing into the cavity from the battery from overflowing outward; An outer sealing rubber ring (4) which is sealingly disposed between the first upper step surface (31) and the first lower step surface (81); An inner sealing rubber ring (5) is sealingly disposed between the second upper step surface (32) and the second lower step surface (82).

2. The double-sealed lead-acid battery safety valve according to claim 1, characterized in that: The valve cover (1) is mounted in the opening by ultrasonic welding.

3. The double-sealed lead-acid battery safety valve according to claim 1, characterized in that: At least one exhaust hole (9) is provided at a location of the valve cover (1) for cooperating with the valve body (3).

4. The double-sealed lead-acid battery safety valve according to any one of claims 1 to 3, characterized in that: The acid filter sheet comprises an upper acid filter sheet (2) and a lower acid filter sheet (7), wherein the upper acid filter sheet (2) is horizontally arranged between the upper part of the cavity and the valve cover (1), and the lower acid filter sheet (7) is horizontally arranged at the lower part of the cavity.

5. The double-sealed lead-acid battery safety valve according to claim 4, characterized in that: An assembly step (34) is provided on the side where the valve body (3) is joined to the lower surface of the upper acid filter (2), and a first boss (11) is provided on the side where the valve cover (1) is joined to the upper surface of the upper acid filter (2), so that a gap is left between the valve cover (1) and the upper acid filter (2).

6. The double-sealed lead-acid battery safety valve according to claim 4, characterized in that: A circular tube structure boss (35) is provided in the valve body (3); the circular tube structure boss (35) is a conical structure that is thick at the bottom and thin at the top; at least one groove is provided at the top of the circular tube structure boss (35); a rubber cap (6) is sleeved on the outer periphery of the circular tube structure boss (35); and the rubber cap (6) is located in the cavity.

7. The double-sealed lead-acid battery safety valve according to claim 6, characterized in that: A cylindrical channel (36) is provided in the circular tube structure boss (35), and the lower acid filter sheet (7) is installed in the cylindrical channel (36) by interference fit.

8. The double-sealed lead-acid battery safety valve according to any one of claims 1 to 3, characterized in that: The volume of the inner sealing rubber ring (5) is greater than the volume of the gap formed between the valve body (3) and the battery cover (8).

9. The double-sealed lead-acid battery safety valve according to claim 8, characterized in that: A valve port sealing line (84) is provided on the joint side between the battery cover (8) and the lower surface of the inner sealing rubber ring (5).

10. The double-sealed lead-acid battery safety valve according to any one of claims 1 to 3, characterized in that: The outer diameter of the valve body (3) is greater than the outer diameter of the outer sealing rubber ring (4).

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