Safety valve for double-sealed lead-acid storage battery

Abstract

The utility model discloses a safety valve for a double-sealed lead-acid storage battery, which relates to the technical field of lead-acid storage batteries and comprises a battery cover, a first lower step surface, a second lower step surface and an internal thread surface are sequentially arranged at the top of the battery cover 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] This utility model relates to the field of lead-acid battery technology, and more specifically, to a safety valve for a double-sealed lead-acid battery. Background Technology

[0002] The safety valve is a crucial component of valve-regulated high-rate lead-acid batteries. Common safety valves typically use only one sealing ring, resulting in a single-seal structure and relatively poor sealing performance. During installation or use, the sealing effect of the safety valve in high-rate lead-acid batteries often decreases or fails due to factors such as the sealing ring not being compressed to the designed compression ratio, deformation, or damage. This, in turn, reduces or eliminates the overall sealing performance of the lead-acid battery.

[0003] Furthermore, a reduction or failure in the overall sealing performance of a lead-acid battery can have the following effects: 1. The safety valve becomes loose, creating a gap between the valve body and the battery cover, causing acid mist to leak out of the lead-acid battery and resulting in water loss; 2. The safety valve cannot open and close properly, failing to guarantee the pressure required for oxygen recombination inside the lead-acid battery; 3. This can cause leakage and crystallization at the safety valve port of the lead-acid battery. All of these problems 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 safety valve in high-rate lead-acid batteries in the existing technology, and ensure the reliability and safety of lead-acid batteries, is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model 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 in the existing high-rate lead-acid battery safety valve, and ensure the reliability and safety of lead-acid batteries.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

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

[0008] A battery cover for closing 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 from top to bottom;

[0009] The valve body has a first upper step surface, a second upper step surface, and an external thread surface arranged sequentially from top to bottom at its bottom. The first upper step surface and the first lower step surface are fitted together, the second upper step surface and the second lower step surface are fitted together, and the external thread surface and the internal thread surface are threaded together. The valve body has a cavity inside, and the top of the cavity has an opening.

[0010] A valve cover, used to close the opening;

[0011] An acid filter, which is disposed in the cavity, is used to prevent acid mist flowing into the cavity from the battery from overflowing outwards;

[0012] An external sealing ring is disposed between the first upper step surface and the first lower step surface;

[0013] The inner sealing ring is located between the second upper step surface and the second lower step surface.

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

[0015] In one embodiment, the valve cover has at least one vent hole at the part for mate assembly with the valve body.

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

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

[0018] In one embodiment, the valve body is provided with a circular tube structure boss, which is a conical structure that is thicker at the bottom and thinner at the top. The top of the circular tube structure boss is provided with at least one groove, and a rubber cap is fitted on the outer periphery of the circular tube structure boss. The rubber cap is located in the cavity.

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

[0020] In one embodiment, the volume of the inner sealing ring is greater 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 side where the battery cover and the lower surface of the inner sealing ring meet.

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

[0023] When using the double-sealed safety valve for lead-acid batteries provided by this invention, firstly, the battery cover can be placed over the lead-acid battery to protect it. Then, an acid filter can be placed inside the valve body cavity, and the valve cover can be used to close the valve body opening to prevent acid mist flowing from the battery into the cavity from overflowing. Finally, the valve body and battery cover are assembled, so that the first upper and lower stepped surfaces cooperate to clamp the outer sealing ring, and the second upper and lower stepped surfaces cooperate to clamp the inner sealing ring, with the external threaded surface of the valve body and the internal threaded surface of the battery cover threadedly connected. After the valve body and battery cover are assembled, the inner and outer sealing rings simultaneously provide a seal, providing a double seal function. This ensures a good sealing effect for the lead-acid battery, effectively solving the problem of previous battery safety valves having a single sealing structure and poor sealing effect, and improving the reliability and safety of high-rate lead-acid batteries.

[0024] In summary, the double-sealed safety valve for lead-acid batteries provided by this utility model can solve the problem of poor sealing effect caused by the single seal in the safety valve of high-rate lead-acid batteries in the prior art, thus ensuring the reliability and safety of lead-acid batteries. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of the valve body of the double-sealed safety valve for lead-acid batteries provided by this utility model;

[0027] Figure 2 This is a schematic diagram of the valve body's appearance.

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

[0029] Figures 1-3 middle:

[0030] 1 is the valve cover, 11 is the first boss, 2 is the upper filter plate, 3 is the valve body, 31 is the first upper step surface, 32 is the second upper step surface, 33 is the external thread surface, 34 is the assembly step, 35 is the round tube structure boss, 36 is the cylindrical channel, 4 is the outer sealing ring, 5 is the inner sealing ring, 6 is the rubber cap, 7 is the lower filter plate, 8 is the battery cover, 81 is the first lower step surface, 82 is the second lower step surface, 83 is the internal thread surface, 84 is the valve port sealing line, and 9 is the vent hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The core of this 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 in the existing high-rate lead-acid battery safety valve, thus ensuring the reliability and safety of lead-acid batteries.

[0033] This specific embodiment provides a double-sealed safety valve for lead-acid batteries. Please refer to [link / reference]. Figure 3 , Figure 3 This diagram illustrates the connection between the valve body and the battery cover of a double-sealed safety valve for lead-acid batteries. The double-sealed safety valve for lead-acid batteries includes:

[0034] 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 arranged sequentially from top to bottom at its bottom. The first upper step surface 31 and the first lower step surface 81 are fitted together, the second upper step surface 32 and the second lower step surface 82 are fitted together, and the external thread surface 33 and the internal thread surface 83 are threaded together. The valve body 3 has a cavity inside, and the top of the cavity has an opening.

[0036] Valve cover 1, which is used to close the opening;

[0037] An acid filter, located inside the cavity, is used to prevent acid mist flowing into the cavity from the battery from overflowing outwards.

[0038] The outer sealing ring 4 is located between the first upper step surface 31 and the first lower step surface 81.

[0039] The inner sealing ring 5 is located 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, primarily used to protect the battery from external environmental damage and also to facilitate battery replacement. The battery cover 8 can be made of various materials, commonly including metal, plastic, and fiberglass. This application, by providing an inner sealing ring 5 and an outer sealing ring 4 at the connection between the battery cover 8 and the valve body 3, effectively prevents the safety valve from loosening, thus avoiding gaps between the valve body 3 and the battery cover 8, which could lead to acid mist leakage from the lead-acid battery and cause water loss.

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

[0042] When using the double-sealed safety valve for lead-acid batteries provided by this utility model, firstly, the battery cover 8 can be placed on the lead-acid battery to protect it. Then, an acid filter can be placed inside 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 acid mist flowing from the battery into the cavity from overflowing outwards. Finally, the valve body 3 and the battery cover 8 are assembled, such that the first upper step surface 31 and the first lower step surface 81 cooperate to clamp the outer sealing ring 4, and the second upper step surface 32 and the second lower step surface 82 cooperate to clamp the inner sealing ring 5, and the external thread surface 33 of the valve body 3 and the internal thread surface 83 of the battery cover 8 are threadedly connected. After the valve body 3 and the battery cover 8 are assembled, the inner sealing ring 5 and the outer sealing ring 4 simultaneously provide a sealing function, ensuring a good sealing effect for the lead-acid battery. This effectively solves the problem of the previous battery safety valves having a single sealing structure and poor sealing effect, improving the reliability and safety of high-rate lead-acid batteries.

[0043] In summary, the double-sealed safety valve for lead-acid batteries provided by this utility model can solve the problem of poor sealing effect caused by the single seal in the safety valve of high-rate lead-acid batteries in the prior art, thus ensuring the reliability and safety of lead-acid batteries.

[0044] In one embodiment, the valve cover 1 is installed inside 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 to the opening of the valve body 3 to cover the opening and prevent acid mist flowing from the battery into the cavity of the valve body 3 from overflowing outward.

[0045] In one embodiment, please refer to Figure 2 The diagram shows the external appearance of the valve body. The valve cover 1, which is used to mate with the valve body 3, has at least one vent hole 9. For example, three vent holes 9 can be evenly spaced around the circumference of the valve cover 1 to facilitate the discharge of gas from 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 disposed between the upper part of the cavity and the valve cover 1, and the lower acid filter 7 is horizontally disposed at the lower part of the cavity, which effectively prevents acid mist flowing from the battery into the valve body 3 from overflowing outward.

[0047] It should be noted that acid filter sheets are filter elements used to filter acidic substances and are widely used in various fields. In storage batteries, acid filter sheets can be used as explosion-proof sheets, serving both filtering and explosion-proof functions. That is, the upper acid filter sheet 2 and the lower acid filter sheet 7 of this application have both filtering and explosion-proof functions.

[0048] In one embodiment, please refer to Figure 1 This is a schematic diagram of the valve body of the double-sealed safety valve for lead-acid batteries provided by this utility model. The valve body 3 has an assembly step 34 that mates with the lower surface of the upper filter 2. The assembly step 34 is used to limit the movement of the upper filter 2. The valve cover 1 has a first protrusion 11 that mates with the upper surface of the upper filter 2, so that a gap is left between the valve cover 1 and the upper filter 2, preventing direct contact between the valve cover 1 and the upper filter 2 and thus affecting the normal use of the upper filter 2.

[0049] In one embodiment, the valve body 3 is provided with a circular tube structure boss 35, which is a tapered structure that is thicker at the bottom and thinner at the top. The top of the circular tube structure boss 35 is provided with at least one groove, and a rubber cap 6 is fitted on the outer periphery of the circular tube structure boss 35. The rubber cap 6 is located in the cavity.

[0050] It should be noted that the valve body 3 has a cylindrical protrusion 35 with a tapered shape, wider at the bottom and narrower at the top. A rubber cap 6 is installed on the upper part of the cylindrical protrusion 35. The taper of the cylindrical protrusion 35 needs to be set according to the opening and closing pressure value of the safety valve. At the same time, several grooves of a certain width are opened on the top plane of the cylindrical protrusion 35 to ensure that the rubber cap 6 can open and close normally under the set opening and closing pressure value after installation. This avoids the safety valve being unable to open and close normally, thus failing to guarantee the pressure required for oxygen recombination inside the lead-acid battery.

[0051] In one embodiment, a cylindrical channel 36 is provided inside the cylindrical tube boss 35, and the lower acid filter 7 is installed inside the cylindrical channel 36 by interference fit. That is, the acid mist flowing from the battery into the cylindrical channel 36 can be blocked by the lower acid filter 7, preventing the acid mist from overflowing outward.

[0052] In one embodiment, the volume of the inner sealing 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 ring 5 is fully compressed 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 ring 5.

[0053] In one embodiment, a valve port sealing line 84 is provided on the lower surface of the battery cover 8 and the inner sealing ring 5 to ensure that the compression ratio of the inner sealing 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 larger than the outer diameter of the outer sealing ring 4 to ensure an effective seal between the first upper step surface 31 and the first lower step surface 81.

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

[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 this application are only distinguished by their different positions and do not have any order of precedence.

[0057] In addition, it should be noted that the orientation or positional relationship indicated by "up and down" or "inside and outside" in this application is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of simplifying the description and making it easier to understand, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this utility model is within the protection scope of this utility model and will not be elaborated upon here.

[0059] The above provides a detailed description of the double-sealed safety valve for lead-acid batteries provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A safety valve for a double-sealed lead-acid battery, characterized in that, include: 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. The valve body (3) has a first upper step surface (31), a second upper step surface (32) and an external thread surface (33) arranged sequentially from top to bottom at its bottom. The first upper step surface (31) and the first lower step surface (81) are fitted together, the second upper step surface (32) and the second lower step surface (82) are fitted together, the external thread surface (33) and the internal thread surface (83) are threaded together, and the valve body (3) has a cavity inside, with an opening at the top of the cavity. Valve cover (1), which is used to close the opening; An acid filter, which is disposed in the cavity, is used to prevent acid mist flowing into the cavity from the battery from overflowing outwards; An outer sealing ring (4) is provided between the first upper step surface (31) and the first lower step surface (81); The inner sealing ring (5) is located between the second upper step surface (32) and the second lower step surface (82).

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

3. The safety valve for a double-sealed lead-acid battery according to claim 1, characterized in that, The valve cover (1) is provided with at least one vent hole (9) at the part for assembling with the valve body (3).

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

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

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

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

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

9. The safety valve for a double-sealed lead-acid battery according to claim 8, characterized in that, The battery cover (8) and the lower surface of the inner sealing ring (5) are provided with a valve port sealing line (84).

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

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