Exhaust cock of lead-acid storage battery

Abstract

The invention discloses a lead-acid storage battery vent bolt which comprises a bolt body, a cylindrical containing cavity is formed in the bolt body, a clamping groove used for being connected with a gas filtering piece in a clamping mode is formed in the end, corresponding to the containing cavity, of the bolt body, and a long-strip-shaped groove hole is formed in the side wall, corresponding to the other end of the containing cavity, of the bolt body; 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] The invention belongs to the technical field of lead-acid battery accessories, and in particular relates to a vent plug for a lead-acid battery. Background Art

[0002] Lead-acid batteries are a main type of battery currently used in automobiles. The battery shell consists of a battery slot, a battery cover, and a vent plug, which is sealed and fixed to the battery cover. During the operation of the battery, part of the hydrogen and oxygen generated is discharged to the outside of the battery through the vent plug, and part is gathered inside the battery. When the battery gas evolution is large, excessive gas pressure may cause acid to surge up. Ordinary vent plugs do not have an acid-blocking structure, and acid is easy to leak from the vent plug.

[0003] In addition, the design requirements of the single-layer cover of the lead-acid battery require that each cell support an independent exhaust system, and the existing exhaust plug cannot prevent the leakage of acid while taking into account the exhaust.

[0004] Therefore, how to provide a lead-acid battery vent plug is a problem that those skilled in the art urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a lead-acid battery vent plug, which can prevent electrolyte overflow and better vent.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a lead-acid battery exhaust plug, comprising:

[0007] A plug body, wherein the plug body has a cylindrical cavity inside, an end of the plug body corresponding to the cavity is provided with a slot for clamping the air filter, and a long slot hole is provided on the side wall of the other end of the plug body corresponding to the cavity;

[0008] A bolt core, the bolt core is detachably connected to the inside of the cavity, the bolt core is provided with a plurality of partitions arranged in sequence from one end to the other end, and there is a reverse inclination angle between adjacent partitions, and support columns are arranged between adjacent partitions, and the plurality of partitions divide the cavity from one end to the other end, and the adjacent cavities are connected to form gas circulation and electrolyte reflux channels, and a protrusion is provided on the partition away from one end of the card slot, and the protrusion is card-engaged with the long slot hole.

[0009] The beneficial effects of the present invention are as follows: the internal volume of the bolt body provides an installation basis for the bolt core, the bolt core is provided with a plurality of partitions, the partitions cooperate with the bolt body to form a plurality of interconnected partitions, the partitions relatively extend the gas and liquid passages inside the bolt body, play the role of blocking and storing acid, slow down the process of electrolyte flowing to the air filter, and avoid the risk of battery leakage; in addition, the bolt core and the bolt body are matched in a plug-in manner, and the bolt core can be smoothly installed only after the air filter is installed in place, and the fixed and matched installation can also play an error-proofing role.

[0010] Preferably, the support column is a T-shaped structure, flow gaps are formed on both side ends of the support column, and reinforcing ribs are provided on both side walls of the support column, and the reinforcing ribs are respectively fixedly connected to adjacent partitions.

[0011] The resulting technical effect is that adjacent partitions are connected by support columns, which adopt a T-shaped structure. The gaps on both sides of the T-shaped structure play a role in air and flow, and are the key to connecting adjacent compartments for air and liquid return. Strengthening the ribs can also improve the connection reliability between the partitions.

[0012] Preferably, the partition is an elliptical structure, a portion of one end of the partition 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, and the upper surface of the partition and the corresponding inclined upper section protrusion have a return slope.

[0013] The resulting technical effect is: since the partition is arranged at an angle in the cavity, considering the close fit between the partition and the inner wall of the cavity, the use of an elliptical partition is just enough to achieve a close fit between the partition and the inner wall of the cavity. Of course, considering the exhaust effect, adjacent cavities need to be connected. At this time, a portion of the inclined bottom end of the partition is cut off to form a flow port, which ensures that the gas can pass while also allowing the electrolyte to reflux. The reflux slope is conducive to the reflux of the electrolyte and is not easy to retain liquid.

[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 reflux 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 reflux slope is symmetrically arranged, and the bottoms of the slopes on both sides are close to the flow gaps on the corresponding sides, which is conducive to the reflux of the electrolyte.

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

[0017] The resulting technical effects are as follows: The annular protrusion is the basis for ensuring the stable installation of the air filter sheet in the card slot. Only after the air filter sheet passes over the annular protrusion and enters the card slot can the bolt core be installed in place, and it can also prevent the air filter sheet from vibrating and falling off. Specifically, the bottom of the card slot is provided with an exhaust hole that penetrates the top of the bolt body. The gas inside the battery cell can be discharged through the exhaust hole after passing through the bolt core and the air filter sheet.

[0018] Preferably, a limiting contact surface is provided on the partition plate at one end of the bolt core close to the card slot, and the limiting contact surface abuts against the annular protrusion.

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

[0020] Preferably, the bolt body is an integrally formed injection molded body. A rubber pad is provided on the top cap portion of the bolt body. On one side of the card slot close to the top cap portion, the rubber pad is in close contact with the top surface of the battery cover. A threaded portion for mating and connecting with the battery cover is provided on the outer side wall of the bolt body and corresponding to the lower part of the top cap portion.

[0021] The resulting technical effects are: When the exhaust bolt is installed, it has an interference fit with the battery cover, and the rubber pad is in close contact with the battery cover to ensure that the seal is leak-proof around.

[0022] Preferably, an angular positioning notch is provided at one end of the outer side wall of the bolt body, and the angular positioning notch is located directly below the long slot hole.

[0023] The resulting technical effect is: The angular positioning notch is used to position the installation of the bolt core. Only at the positioning angle of the angular positioning notch can the bolt core be snap-connected to the bolt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall structure diagram of an exhaust bolt for a lead-acid battery of the present invention;

[0025] Figure 2 It is the cross-sectional view of the bolt body of an exhaust bolt for a lead-acid battery of the present invention;

[0026] Figure 3 It is the top view of the bolt body of an exhaust bolt for a lead-acid battery of the present invention;

[0027] Figure 4 It is the structure diagram of the bolt core of an exhaust bolt for a lead-acid battery of the present invention;

[0028] Figure 5 It is the side view of the bolt core of an exhaust bolt for a lead-acid battery of the present invention;

[0029] Figure 6 It is the schematic diagram of multiple partition chambers of an exhaust bolt for a lead-acid battery of the present invention.

[0030] 1 Plug body, 11 Cavity, 12 Card slot, 13 Top cap part, 2 Rubber gasket, 3 Ring convex, 4 Plug core, 41 Partition board, 42 Support column, 43 Flow-through notch, 44 Reinforcing rib plate, 45 Protrusion, 46 Limiting contact surface, 47 Return slope surface, 5 Angular positioning notch, 6 Long strip slot hole, 7 Air filter sheet, 8 Partition cavity. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Refer to the attached drawings of the present invention Figures 1 to 6 , according to an exhaust plug of a lead-acid battery in an embodiment of the present invention, it includes:

[0033] A plug body 1, the inside of the plug body 1 has a columnar cavity 11, one end of the plug body 1 corresponding to the cavity 11 is provided with a card slot 12 for clamping an air filter sheet 7, and a long strip slot hole 6 is provided on the side wall of the plug body 1 corresponding to the other end of the cavity. The slot direction of the long strip slot hole corresponds to the axial direction of the plug body;

[0034] A plug core 4, the plug core 4 is detachably connected inside the cavity 11. Four partition boards 41 are arranged at intervals and obliquely from one end to the other end of the plug core 4. There is a reverse inclination angle between adjacent partition boards 41. Support columns 42 are arranged between adjacent partition boards 41. The multiple partition boards 41 divide four partition cavities 8 in the cavity from one end to the other end, which can relatively extend the distance of the gas passage, play a role in blocking acid and storing acid, thereby slowing down the flow of the electrolyte to the air filter sheet and avoiding the risk of battery leakage. The adjacent partition cavities 8 are communicated and form a gas circulation and electrolyte return channel. It can be understood that the four partition cavities form a looped and tortuous channel that progresses towards the exhaust port direction. A protrusion 45 is provided on the partition board 41 far from the card slot end, and the protrusion 45 is in clamping fit with the long strip slot hole 6.

[0035] In some other embodiments, the support column 42 is of a T-shaped structure. Flow-through notches 43 are formed at both side ends of the support column 42, which provide a channel for the return of the electrolyte and are also the basis for the adjacent upper and lower partition cavities. Reinforcing rib plates 44 are provided on both side walls of the support column 42, and the reinforcing rib plates 44 are fixedly connected to the adjacent partition boards 41 respectively, thereby improving the overall stability of the plug core.

[0036] In other embodiments, the partition 41 is an elliptical structure that fits the inner wall of the columnar cavity. A portion of the partition 41 corresponding to one end of 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 are protruded with a reflux slope 47. The protrusion height is 0.3 mm and it slows down symmetrically on both sides to facilitate the electrolyte to flow back to the downstream.

[0037] In some other embodiments, the bottom of the reflux slope 47 is close to the flow gap of the support column 42, which is conducive to the electrolyte being drained to the flow gap and refluxed toward the battery cell.

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

[0039] In other embodiments, a limit contact surface 46 is provided on the partition of the plug core 4 near one end of the slot 12, and the limit contact surface 46 abuts against the annular protrusion 3. If the air filter is not installed in place, the plug core cannot be installed smoothly.

[0040] In some other embodiments, the bolt body 1 is an integrally formed injection molded body, the top cap portion 13 of the bolt body 1 is provided with a rubber pad 2, the top cap portion has a cross groove for conveniently twisting the exhaust plug, the slot 12 is close to one side of the top cap portion 13, the rubber pad 2 is in close contact with the top surface of the battery cover, and a threaded portion for matching and connecting the battery cover is provided on the outer wall of the bolt body 1 and below the corresponding top cap portion.

[0041] In other embodiments, an angular positioning notch 5 is provided at one end of the outer side wall of the bolt body 1 , and the angular positioning notch 5 is located directly below the long slot 6 , so as to quickly realize the disassembly and connection of the bolt core.

[0042] The exhaust plug of the present invention reduces the risk of leakage and supports the independent exhaust system of each cell required by the single-layer cover design of the lead-acid battery.

[0043] As for the device and the method of use disclosed in the embodiment, since they correspond to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

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

Claims

1. A lead-acid battery vent plug, characterized in that: include: A plug body (1), wherein the plug body (1) has a columnar cavity (11) inside, an end of the plug body (1) corresponding to the cavity (11) is provided with a clamping groove (12) for clamping an air filter (7), and a long slot (6) is provided on the side wall of the other end of the plug body (1) corresponding to the cavity; A plug core (4), the plug core (4) is detachably connected to the interior of the cavity (11), the plug core (4) is provided with a plurality of partitions (41) arranged in an inclined manner from one end to the other end, adjacent partitions (41) have a reverse inclination angle, support columns (42) are arranged between adjacent partitions, the plurality of partitions (41) divide a plurality of compartments (8) from one end to the other end in the cavity, adjacent compartments (8) are connected to form gas circulation and electrolyte reflux channels, a convex block (45) is provided on the partition (41) at one end away from the card slot, the convex block (45) is card-engaged with the long slot hole (6).

2. A lead-acid battery vent plug according to claim 1, characterized in that: The support column (42) is a T-shaped structure, and flow gaps (43) are formed at both side ends of the support column (42). Reinforcement ribs (44) are provided on both side walls of the support column (42), and the reinforcement ribs (44) are respectively fixedly connected to adjacent partitions (41).

3. A lead-acid battery vent plug according to claim 1, characterized in that: The partition (41) is an elliptical structure. A portion of one end of the partition (41) corresponding to the elliptical structure is cut off to form a flow opening. The flow opening is located at the inclined bottom end of the partition. The upper surface of the partition (41) and the corresponding inclined upper section protrusion have a return slope (47).

4. A lead-acid battery vent plug according to claim 3, characterized in that: 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, characterized in that: An annular protrusion (3) is formed inside the plug body (1) and between the corresponding clamping groove and the cavity. The air filter (7) is a valve-controlled air filter and is embedded in the clamping groove beyond the annular protrusion. There is a gap between the air filter (7) and the inner bottom surface of the plug body (1).

6. A lead-acid battery vent plug according to claim 5, characterized in that: A limiting contact surface (46) is provided on a partition plate at one end of the bolt core (4) close to the clamping groove (12), and the limiting contact surface (46) abuts against the annular protrusion (3).

7. A lead-acid battery vent plug according to claim 1, characterized in that: The plug body (1) is an integrally formed injection molded body, the top cap portion (13) of the plug body (1) is provided with a rubber pad (2), the slot (12) is close to one side of the top cap portion (13), the rubber pad (2) is in close contact with the top surface of the battery cover, and a threaded portion for matching and connecting with the battery cover is provided on the outer wall of the plug body (1) and below the corresponding top cap portion.

8. A lead-acid battery vent plug according to claim 1, characterized in that: An angular positioning notch (5) is provided at one end of the outer side wall of the bolt body (1), and the angular positioning notch (5) is located directly below the long slot hole (6).

Images