Exhaust cock of lead-acid storage battery

Abstract

The utility model discloses a lead-acid storage battery vent bolt which comprises a bolt body, a cylindrical containing cavity is arranged inside the bolt body, a clamping groove used for clamping a gas filtering piece is arranged at the end of the bolt body corresponding to the containing cavity, and a long-strip-shaped groove hole is arranged on the side wall of the other end of the bolt body corresponding to the containing cavity. The suppository core is detachably connected into the containing cavity, a plurality of partition plates are sequentially and obliquely arranged on the suppository core at intervals from one end to the other end, a reverse inclination angle is formed between every two adjacent partition plates, supporting columns are arranged between every two adjacent partition plates, and the partition plates divide a plurality of partition cavities in the containing cavity from one end to the other end. According to the single-layer cover of the lead-acid storage battery, the risk of liquid overflow can be reduced, the single-layer cover is convenient to disassemble and use, and the requirement of an exhaust system for mutually independent unit cells required by the design of a single-layer cover of the lead-acid storage battery is met.

Description

Technical Field

[0001] This utility model belongs to the technical field of lead-acid battery accessories, specifically relating to a lead-acid battery vent plug. Background Technology

[0002] Lead-acid batteries are currently the main type of battery used in automobiles. Their casing consists of a battery case, a battery cover, and a vent plug, which is sealed and fixed to the battery cover. During battery operation, some of the hydrogen and oxygen produced are released outside the battery through the vent plug, while some accumulates inside. When the amount of gas produced is large, the excessive gas pressure may cause acid to rise to the surface. Ordinary vent plugs lack acid-blocking structures, making it easy for acid to leak from them.

[0003] In addition, the design requirements of the single-layer cover of lead-acid batteries require that each cell support an independent venting system, but the existing vent plugs cannot prevent acid leakage while venting.

[0004] Therefore, how to provide a lead-acid battery vent plug is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a lead-acid battery vent plug that can prevent electrolyte leakage and also allow for better venting.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a lead-acid battery vent plug, comprising:

[0007] The plug body has a cylindrical cavity inside. The end of the plug body corresponding to the cavity is provided with a slot for engaging the filter plate. The side wall of the other end of the plug body corresponding to the cavity is provided with an elongated slot.

[0008] The core is detachably connected to the inside of the cavity. The core has multiple partitions arranged at intervals from one end to the other, with adjacent partitions having opposite tilt angles. A support column is arranged between adjacent partitions. The multiple partitions divide the cavity into multiple compartments from one end to the other. Adjacent compartments are connected to form a gas flow and electrolyte return channel. A protrusion is provided on the partition at the end away from the slot, and the protrusion engages with the elongated slot.

[0009] The beneficial effects of this utility model are as follows: the internal cavity of the plug body provides an installation base for the plug core, the plug core is provided with multiple baffles, and the baffles and the plug body cooperate to form multiple interconnected cavities. The cavities relatively extend the gas and liquid passages inside the plug body, playing the role of blocking and storing acid, slowing down the process of electrolyte flowing to the filter plate, and avoiding the risk of battery leakage. In addition, the plug core and the plug body adopt a plug-in type fit, and the plug core can be installed smoothly only after the filter plate is installed in place, which is fixed firmly. The fit-in installation can also play a role in preventing mistakes.

[0010] Preferably, the support column has a T-shaped structure, with flow-through notches formed at both ends of the support column, and reinforcing ribs provided on both side walls of the support column, the reinforcing ribs being fixedly connected to adjacent partitions respectively.

[0011] The resulting technical effect is that adjacent partitions are connected by support columns, which adopt a T-shaped structure. The notches at both ends of the T-shaped structure serve to facilitate air and fluid flow, which is the key to connecting adjacent cavities for air and liquid return. The reinforcing ribs also improve the reliability of the connection between partitions.

[0012] Preferably, the partition is an elliptical structure, with a portion cut off at one end of the elliptical structure to form a flow outlet. The flow outlet is located at the inclined bottom end of the partition, and the upper surface of the partition, corresponding to the inclined upper section, has a return slope.

[0013] The resulting technical effect is that, since the partition is arranged at an angle in the cavity, considering the close contact between the partition and the inner wall of the cavity, the elliptical partition can be used to achieve a close fit between the partition and the inner wall of the cavity. Of course, considering the exhaust effect, the adjacent cavities need to be connected. At this time, the bottom end of the inclined partition is cut off to form an outlet, which ensures the passage of gas while also realizing the return of electrolyte. The return slope is conducive to the return of electrolyte and makes it less likely for liquid to accumulate.

[0014] Preferably, the bottom of the return slope is close to the flow gap of the support column.

[0015] The resulting technical effect is that the bottom of the return slope is close to the flow gap of the support column, which can smoothly return the electrolyte in the compartment to the next compartment. In specific implementation, the return slope is symmetrically arranged, and the bottom of both sides of the slope is close to the flow gap on the corresponding side, which is conducive to the return of electrolyte.

[0016] Preferably, an annular protrusion is formed inside the plug body and between the corresponding slot and the cavity, the filter is a valve-controlled filter and is embedded in the slot beyond the annular protrusion, and there is a gap between the filter and the inner bottom surface of the plug body.

[0017] The resulting technical effect is that the annular protrusion is the foundation for ensuring the stable installation of the filter in the slot. Only after the filter passes through the annular protrusion and enters the slot can the plug core be installed in place. It also prevents the filter from vibrating and falling off. Specifically, the bottom of the slot is provided with an exhaust hole that penetrates the top of the plug body. The gas inside the battery cell can be discharged through the exhaust hole after passing through the plug core and the filter.

[0018] Preferably, the partition plate near the slot of the bolt core is provided with a limiting contact surface, which abuts against the annular protrusion.

[0019] The resulting technical effect is that the limiting contact surface can ensure that the top of the plug is installed in place.

[0020] Preferably, the plug body is an integrally molded injection molded body, the top cap of the plug body is provided with a rubber pad, the slot is close to the side of the top cap, the rubber pad is in close contact with the top surface of the battery cover, and the outer side wall of the plug body and the lower part corresponding to the top cap are provided with a threaded part for cooperating with and connecting the battery cover.

[0021] The resulting technical effect is that the vent plug is installed with an interference fit with the battery cover, and the rubber gasket is in close contact with the battery cover, ensuring a leak-proof seal around the perimeter.

[0022] Preferably, one end of the outer wall of the bolt body is provided with an angular positioning notch, which is located directly below the elongated slot.

[0023] The resulting technical effect is that the angular positioning notch is used for the installation of the positioning core, and the core can only be snapped onto the body when the angular positioning notch is at the positioning angle. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of a lead-acid battery vent plug according to the present invention;

[0025] Figure 2 This is a cross-sectional view of the vent plug of a lead-acid battery according to the present invention;

[0026] Figure 3 This is a top view of the vent plug of a lead-acid battery according to the present invention;

[0027] Figure 4 This is a schematic diagram of the core structure of a lead-acid battery vent plug according to the present invention;

[0028] Figure 5 This is a side view of the core of a lead-acid battery vent plug according to the present invention.

[0029] Figure 6 This is a schematic diagram of multiple cavities in a lead-acid battery vent plug according to the present invention.

[0030] 1. Bolt body, 11. Cavity, 12. Slot, 13. Top cap, 2. Rubber pad, 3. Ring protrusion, 4. Bolt core, 41. Partition plate, 42. Support column, 43. Flow notch, 44. Reinforcing rib, 45. Protrusion, 46. Limiting contact surface, 47. Return slope, 5. Angular positioning notch, 6. Long slot hole, 7. Air filter, 8. Partition cavity. 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] See appendix to this utility model Figures 1 to 6 According to an embodiment of the present invention, a lead-acid battery vent plug includes:

[0033] The plug body 1 has a cylindrical cavity 11 inside. The end of the plug body 1 corresponding to the cavity 11 is provided with a slot 12 for engaging the filter plate 7. The side wall of the other end of the plug body 1 corresponding to the cavity is provided with an elongated slot 6, and the slot of the elongated slot is oriented towards the axial direction of the plug body.

[0034] The core 4 is detachably connected inside the cavity 11. The core 4 has four partitions 41 arranged at intervals from one end to the other, with adjacent partitions 41 having opposite tilt angles. Support columns 42 are arranged between adjacent partitions. The multiple partitions 41 divide the cavity into four compartments 8 from one end to the other, which can relatively extend the distance of the gas passage, play the role of blocking and storing acid, thereby slowing down the flow of electrolyte to the filter plate and avoiding the risk of battery leakage. The adjacent compartments 8 are connected to form a gas flow and electrolyte return channel. It can be understood that the four compartments form a looping and tortuous channel that progresses towards the exhaust port. The partition 41 away from the slot is provided with a protrusion 45, which engages with the elongated slot 6.

[0035] In other embodiments, the support column 42 has a T-shaped structure, and flow gaps 43 are formed at both ends of the support column 42. This provides a channel for the return of electrolyte and is also the basis for the upper and lower adjacent cavities. Reinforcing ribs 44 are provided on both sides of the support column 42. The reinforcing ribs 44 are fixedly connected to the adjacent cavities 41 respectively, thereby improving the overall stability of the core.

[0036] In other embodiments, the partition 41 is an elliptical structure adapted to the inner wall of the cylindrical cavity. One end of the partition 41 corresponding to the elliptical structure is cut off to form a flow port to ensure gas passage. The flow port 43 is located at the inclined bottom end of the partition. The upper surface of the partition 41 and the corresponding inclined upper section have a return slope 47 with a height of 0.3mm. The slope is symmetrically reduced to both sides to facilitate the return of electrolyte to the downstream.

[0037] In some other embodiments, the bottom of the return slope 47 is close to the overflow gap of the support column 42, which facilitates the electrolyte to flow to the overflow gap and back to the cell.

[0038] In some other specific embodiments, an annular protrusion 3 is formed inside the plug body 1 and between the corresponding slot and the cavity. The filter plate 7 is a valve-controlled filter plate and is embedded in the slot beyond the annular protrusion. The annular protrusion can prevent the filter plate from falling off due to battery vibration. There is a gap between the filter plate 7 and the inner bottom surface of the plug body 1. The plug body is provided with an exhaust hole above the filter plate. The gas passing through the filter plate is finally discharged from the exhaust hole, while the intercepted electrolyte flows back into the cell.

[0039] In other embodiments, a limiting contact surface 46 is provided on the partition plate near the end of the plug core 4 near the slot 12. The limiting contact surface 46 abuts against the annular protrusion 3. If the filter sheet is not installed properly, the plug core cannot be installed smoothly.

[0040] In some other embodiments, the plug body 1 is an integrally molded injection body. The top cap 13 of the plug body 1 is provided with a rubber pad 2. The top cap has a cross groove for easy unscrewing of the vent plug. The slot 12 is located on the side near the top cap 13. The rubber pad 2 is in close contact with the top surface of the battery cover. The outer side wall of the plug body 1 and the lower part corresponding to the top cap are provided with a threaded part for engaging and connecting the battery cover.

[0041] In other embodiments, one end of the outer wall of the plug body 1 is provided with an angular positioning notch 5, which is located directly below the elongated slot 6, thereby enabling quick disassembly and connection of the plug core.

[0042] This utility model's vent plug reduces the risk of leakage and supports the independent venting system required for each cell in a single-layer cover design of lead-acid batteries.

[0043] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lead-acid battery vent plug, characterized by, include: The plug body (1) has a cylindrical cavity (11) inside. The end of the plug body (1) corresponding to the cavity (11) is provided with a slot (12) for engaging the filter plate (7). The side wall of the other end of the plug body (1) corresponding to the cavity is provided with a long slot (6). The core (4) is detachably connected to the inside of the cavity (11). The core (4) has multiple partitions (41) arranged at intervals from one end to the other. Adjacent partitions (41) have opposite tilt angles. Support columns (42) are arranged between adjacent partitions. The multiple partitions (41) divide the cavity into multiple compartments (8) from one end to the other. Adjacent compartments (8) are connected to form a gas flow and electrolyte return channel. A protrusion (45) is provided on the partition (41) away from the slot. The protrusion (45) is engaged with the elongated slot (6).

2. A lead-acid battery vent plug according to claim 1, characterised in that, The support column (42) has a T-shaped structure. The two ends of the support column (42) form flow gaps (43). The two side walls of the support column (42) are provided with reinforcing ribs (44). The reinforcing ribs (44) are fixedly connected to the adjacent partitions (41).

3. A lead-acid battery vent plug according to claim 1, wherein, The partition (41) has an elliptical structure. One end of the partition (41) corresponding to the elliptical structure is cut off to form a flow port. The flow port is located at the inclined bottom end of the partition. The upper surface of the partition (41) and the corresponding inclined upper section have a return slope (47).

4. A lead-acid battery vent plug according to claim 3, wherein, The bottom of the return slope (47) is close to the flow gap of the support column (42).

5. A lead-acid battery vent plug according to claim 1, wherein, An annular protrusion (3) is formed inside the plug body (1) and between the corresponding slot and the cavity. The filter plate (7) is a valve-controlled filter plate and is embedded in the slot over the annular protrusion. There is a gap between the filter plate (7) and the inner bottom surface of the plug body (1).

6. A lead-acid battery vent plug according to claim 5, wherein, The bolt core (4) has a limiting contact surface (46) on the partition plate near the slot (12), and the limiting contact surface (46) abuts against the annular protrusion (3).

7. A lead-acid battery vent plug according to claim 1, wherein, The plug body (1) is an integrally molded injection body. The top cap (13) of the plug body (1) is provided with a rubber pad (2). The slot (12) is located on the side near the top cap (13). The rubber pad (2) is in close contact with the top surface of the battery cover. The outer side wall of the plug body (1) and the lower part of the top cap are provided with a threaded part for connecting the battery cover.

8. A lead-acid battery vent plug according to claim 1, wherein, The outer side wall of the bolt (1) is provided with an angular positioning notch (5), which is located directly below the elongated slot (6).

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