Hydrogen-oxygen combination valve for battery

Abstract

The invention relates to the technical field of battery combination valves, and discloses a hydrogen-oxygen combination valve for a battery, which comprises a valve body mounted at the upper part of the battery, the valve body partially extends into the battery and is communicated with the internal space of the battery, a catalyst rod is arranged in the valve body, and a catalyst capable of catalyzing hydrogen-oxygen gas is arranged in the catalyst rod. The catalyst is used for promoting the hydrogen-oxygen gas to generate catalytic reaction to generate water and gas; a valve cover covers the upper part of the valve body, gas generated after reaction floats upwards and is discharged through a gap between the upper part of the valve body and the valve cover, and water vapor generated after reaction falls back into the battery through the valve body after being condensed. According to the invention, the phenomenon of water loss and failure of the battery caused by water loss in the electrolyte due to long-time charging of the battery is prevented, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This invention relates to the field of battery composite valve technology, specifically a hydrogen-oxygen composite valve for batteries. Background Technology

[0002] Lead-acid batteries are widely used in automobiles, electric vehicles, energy storage devices, emergency power supplies, and other fields due to their low cost, large capacity, and high reliability. During the charge-discharge cycle of lead-acid batteries, especially during the charging stage, when the charging voltage reaches a certain threshold, the electrolyte inside the battery undergoes an electrolytic reaction, decomposing to produce hydrogen and oxygen. This electrolytic phenomenon is an unavoidable side reaction during the operation of lead-acid batteries. As the charging time increases, the hydrogen and oxygen gases produced by electrolysis continuously accumulate inside the battery, causing the internal pressure of the battery to gradually increase.

[0003] To prevent safety accidents such as battery explosions due to excessive internal pressure, existing lead-acid batteries are usually equipped with safety valves. When the internal pressure of the battery rises to the preset opening pressure of the safety valve, the safety valve will automatically open to discharge the hydrogen and oxygen mixture gas accumulated inside the battery to the external environment. After the internal pressure of the battery drops to a safe range, the safety valve will automatically close.

[0004] However, while this traditional safety valve structure can solve the safety problem of excessive internal battery pressure, it has many insurmountable drawbacks in practical applications. Traditional safety valves reduce internal pressure by directly releasing hydrogen and oxygen gases, which are generated by the electrolysis of water in the electrolyte. This gas release inevitably leads to a significant loss of water from the battery. As the number of charge-discharge cycles increases, water loss continues, and the electrolyte concentration gradually increases. This not only accelerates the corrosion of the internal electrodes but also causes rapid capacity decay, ultimately leading to battery failure due to severe water loss. This significantly shortens the lifespan of lead-acid batteries, especially in high-frequency charging and discharging applications, where this problem is even more pronounced. Furthermore, the gas emitted by the safety valve is a mixture of hydrogen and oxygen. Hydrogen is flammable and explosive, and when its volume fraction in the air reaches a certain threshold, it will form an explosive mixture. Once it encounters an ignition source such as an open flame or an electric spark, an explosion or combustion accident may occur. In enclosed or semi-enclosed spaces such as car engine compartments and electric vehicle battery compartments, the emitted hydrogen-oxygen mixture can easily accumulate, further increasing the risk of explosion and posing a serious threat to the personal and property safety of users.

[0005] Therefore, there is an urgent need in the field to improve the hydrogen-oxygen composite valve for batteries in order to overcome the shortcomings of the prior art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a hydrogen-oxygen composite valve for batteries, which prevents the loss of water in the electrolyte due to prolonged charging, thus preventing battery dehydration and failure and extending battery life.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen-oxygen composite valve for batteries, comprising a valve body installed on the upper part of the battery, wherein the valve body extends into the battery and communicates with the internal space of the battery, and a catalyst rod is provided in the valve body, wherein the catalyst rod contains a catalyst capable of catalyzing hydrogen and oxygen gas, and the catalyst is used to promote the catalytic reaction of hydrogen and oxygen gas to generate water and gas. The upper part of the valve body is covered with a valve cover. The gas generated after the reaction rises and is discharged through the gap between the upper part of the valve body and the valve cover. The water generated after the reaction is condensed and falls back into the battery through the valve body.

[0008] Preferably, the valve body includes a valve seat, the lower part of which is fixedly connected to a connecting ring for connection with a battery package, the upper part of which is provided with an upper convex ring located above the battery package, the lower part of which is connected to a chamber, the catalyst rod being housed in the chamber, the sidewalls of the chamber and the connecting ring being provided with multiple vent holes, the upper convex ring having a centrally located connecting ring adapted to the catalyst rod, the upper convex ring also having a gas discharge chamber, the valve cover being located on the top of the upper convex ring, the bottom of the chamber having a drain hole communicating with the chamber and the inside of the battery, the connecting ring having a condensate ring communicating with the chamber and the valve seat.

[0009] Preferably, a rubber cap valve is provided above the connecting ring, and the rubber cap valve is configured to be electrically connected to the battery to perform opening and closing actions according to the internal air pressure of the battery.

[0010] Preferably, filter plates are provided in the upper part of the gas discharge chamber and the upper part of the condensate ring, and the filter plates are located above the rubber cap valve.

[0011] Preferably, a buffer pad is provided at the bottom of the chamber, the buffer pad being elastic and used to support and cushion the catalyst rod.

[0012] Preferably, the side of the connecting ring is provided with a plurality of L-shaped snap-fit ​​brackets, the shape of which is adapted to the mounting part of the battery package, and one side of which is an inclined guide surface.

[0013] Preferably, a first elastic snap ring and a second elastic snap ring are respectively provided on two adjacent sides of each snap ring, and both the first elastic snap ring and the second elastic snap ring have elastic deformation capability.

[0014] Preferably, a plurality of limiting ribs are fixedly connected to the lower surface of the valve cover, and a positioning rib extends from the bottom end of each limiting rib. The top surface of the upper convex ring is provided with a connecting hole that matches the positioning rib.

[0015] Preferably, a sealing ring is fitted on the side of the connecting ring, and the sealing ring is an elastic sealing element.

[0016] Preferably, the upper convex ring has multiple reinforcing ribs on its side, and the reinforcing ribs are connected to the valve seat.

[0017] To address the shortcomings of existing technologies, this invention provides a hydrogen-oxygen composite valve for batteries, overcoming these deficiencies. The beneficial effects of this invention are as follows: 1. In this invention, by setting a catalyst rod in the valve body, hydrogen and oxygen gas are gathered into the interior of the composite valve body through the vent hole. Hydrogen and oxygen react with the catalyst in the catalyst rod. The gas generated after the reaction floats up and is discharged through the gap between the upper part of the valve body and the valve cover. The water vapor generated by the reaction is condensed and falls back into the battery through the valve body, preventing the battery from losing water and failing due to prolonged charging, and extending the battery's service life.

[0018] 2. In this invention, by setting a gas filter, the gas filter allows gas to be discharged while blocking the leakage of water vapor and electrolyte particles, thereby reducing battery water loss and extending service life. The gas filter can effectively filter acidic mist droplets in the discharged gas, avoiding corrosion of surrounding components or environmental pollution. At the same time, it can also prevent external sparks or flames from entering the battery, reducing the risk of battery explosion due to internal gas accumulation and improving safety.

[0019] 3. In this invention, by setting up several snap-fit ​​brackets, and one side of the snap-fit ​​brackets is inclined, it plays a guiding and limiting role. Together with the first elastic snap-fit ​​ring and the second elastic snap-fit ​​ring, it is convenient to install or disassemble the valve body later.

[0020] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] Figure 1 This is a structural schematic diagram of the overall appearance of the present invention; Figure 2This is a structural schematic diagram of the overall appearance of the invention from another perspective; Figure 3 This is a schematic cross-sectional view of the entire structure of the present invention; Figure 4 This is a structural schematic diagram showing the entire invention from another perspective; Figure 5 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 3 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the valve body of the present invention mounted on a battery.

[0023] In the diagram: 1. Valve seat; 2. Connecting ring; 3. Upper convex ring; 4. Communicating ring; 5. Gas discharge chamber; 6. Valve cover; 7. Chamber; 8. Catalyst rod; 9. Vent hole; 10. Drain hole; 11. Cap valve; 12. Filter plate; 13. Buffer pad; 14. Snap-fit ​​bracket; 15. First elastic snap-fit ​​ring; 16. Second elastic snap-fit ​​ring; 17. Limiting rib; 18. Positioning rib; 19. Connecting hole; 20. Sealing ring; 21. Reinforcing rib; 22. Condensate ring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-7A hydrogen-oxygen composite valve for batteries includes a valve body mounted on the upper part of the battery, with the valve body extending into the battery and communicating with the internal space of the battery. A catalyst rod 8 is disposed within the valve body, containing a catalyst capable of catalyzing hydrogen and oxygen gases. The catalyst promotes a catalytic reaction between the hydrogen and oxygen gases to produce water and gas. A valve cover 6 is provided on the upper part of the valve body. The gas generated after the reaction rises and is discharged through the gap between the upper part of the valve body and the valve cover 6. The water generated after the reaction is condensed and falls back into the battery through the valve body. The valve body includes a valve seat 1, with a connecting ring 2 fixedly connected to the lower part of the valve seat 1 for connection to the battery package. An upper protruding ring 3 is provided on the upper part of the valve seat 1 above the battery package. A chamber 7 is connected to the lower part of the connecting ring 2, and the catalyst rod 8 is housed within it. Inside the chamber 7, multiple vent holes 9 are provided on the side walls of the chamber 7 and the side walls of the connecting ring 2. A connecting ring 4 adapted to the catalyst rod 8 is centrally located inside the upper convex ring 3. A gas discharge chamber 5 is also formed inside the upper convex ring 3. A valve cover 6 is located on the top of the upper convex ring 3. A drain hole 10 communicating with the chamber 7 and the inside of the battery is provided at the bottom of the chamber 7. A condensate ring 22 is provided inside the connecting ring 2. The condensate ring 22 communicates with the chamber 7 and the valve seat 1. A rubber cap valve 11 is provided above the connecting ring 4. The rubber cap valve 11 is configured to be electrically connected to the battery to perform opening and closing actions according to the internal gas pressure of the battery. A filter plate 12 is provided on the upper part of the gas discharge chamber 5 and the upper part of the condensate ring 22. The filter plate 12 is located above the rubber cap valve 11.

[0026] Specifically, the valve body is installed on the battery package, with chamber 7 located inside the battery. During charging, the lead-acid battery ionizes the water in the electrolyte into hydrogen and oxygen. These two gases accumulate inside the battery and rise to the top, then gather inside the composite valve body through the vent 9. The hydrogen and oxygen then pass through the catalyst rod 8 inside the valve body, contacting the active material within the catalyst rod 8. The catalyst rod 8 is a porous ceramic rod containing a catalyst. At room temperature, the catalyst can react the hydrogen and oxygen gases to generate water. The catalyst can be a platinum-based or palladium-based catalyst, etc. The porous ceramic catalyst rod 8 fixes the catalyst within its internal pores. The catalytic reaction generates water vapor, which heats up during the catalytic process. The water vapor rises to the condensation ring 22 and is condensed by the condensation ring 22. The condensation ring 22 is a frustum shape, wider at the top and narrower at the bottom, with a water collection channel in the middle. The condensed water flows downwards through this channel and returns to chamber 7 under gravity. At the bottom, water flows back into the battery through the drain hole 10 to replenish the electrolyte, preventing water loss and battery failure caused by prolonged charging, thus extending battery life. The cap valve 11 controls the internal pressure of the battery. It automatically opens when the internal pressure reaches a certain value and closes when it is below the peak value. When the cap valve 11 is opened, the exhaust gas from the reaction between the catalyst and hydrogen-oxygen gas moves upward through the connecting ring 4 to the gas exhaust chamber 5, and is filtered by the filter plate 12 before being discharged outside the battery. The filter plate 12 is made of waterproof and breathable material (such as polytetrafluoroethylene membrane or porous structure), allowing gas to be discharged while blocking water vapor and electrolyte particles from leaking out, thereby reducing battery water loss and extending service life. The filter plate 12 can effectively filter acidic droplets in the discharged gas, avoiding corrosion of surrounding components or environmental pollution. At the same time, it can also prevent external sparks or flames from entering the battery, reducing the risk of battery explosion due to internal gas accumulation and improving safety.

[0027] As a technical optimization of the present invention, a buffer pad 13 is provided at the bottom of the chamber 7. The buffer pad 13 is elastic and is used to support and buffer the catalyst rod 8. Multiple L-shaped snap-fit ​​brackets 14 are provided on the side of the connecting ring 2. The shape of the snap-fit ​​bracket 14 is adapted to the installation position of the battery package, and one side of it is inclined guide surface. A first elastic snap-fit ​​ring 15 and a second elastic snap-fit ​​ring 16 are respectively provided on two adjacent sides of each snap-fit ​​bracket 14. Both the first elastic snap-fit ​​ring 15 and the second elastic snap-fit ​​ring 16 have elastic deformation capability. The battery package shell position is provided with an installation port adapted to the connecting ring 2 and the snap-fit ​​bracket 14. The connecting ring 2 is inserted by plugging and the valve body is rotated by rotation. The inclined side of the snap-fit ​​bracket 14 has a guiding and pressing effect. The first elastic snap-fit ​​ring 15 and the second elastic snap-fit ​​ring 16 are snapped into the inner side wall of the installation port, which facilitates the installation of the valve body.

[0028] As a technical optimization of the present invention, a plurality of limiting ribs 17 are fixedly connected to the lower surface of the valve cover 6. Each limiting rib 17 has a positioning rib 18 extending from its bottom end. The top surface of the upper convex ring 3 is provided with a connecting hole 19 that matches the positioning rib 18. The positioning rib 18 is inserted into the connecting hole 19 and blocked by the limiting ribs 17, so that there is a gap between the valve cover 6 and the upper part of the upper convex ring 3 for exhaust gas to be discharged. A sealing ring 20 is sleeved on the side of the connecting ring 2. The sealing ring 20 is an elastic sealing element to improve the sealing effect. A plurality of reinforcing ribs 21 are provided on the side of the upper convex ring 3. The reinforcing ribs 21 are connected to the valve seat 1 to improve their own strength.

[0029] All of the electrical products mentioned above can be purchased from the market. They are mature technologies and have been fully disclosed, so they will not be repeated in the instruction manual. All of the electrical products mentioned above are equipped with power cords, and they are electrically connected to the external main controller and battery through the power cords. The main controller can be a conventional known device such as a computer that plays a control role.

[0030] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do 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, they should not be construed as limitations on this invention.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrogen-oxygen composite valve for batteries, characterized in that, Includes a valve body installed on the top of the battery, the valve body extending into the battery and communicating with the internal space of the battery, the valve body is provided with a catalyst rod (8), the catalyst rod (8) contains a catalyst that can catalyze hydrogen and oxygen gas, the catalyst is used to promote the catalytic reaction of hydrogen and oxygen gas to produce water and gas; The upper part of the valve body is covered with a valve cover (6). The gas generated after the reaction rises and is discharged through the gap between the upper part of the valve body and the valve cover (6). The water generated after the reaction is condensed and falls back into the battery through the valve body.

2. The hydrogen-oxygen composite valve for batteries according to claim 1, characterized in that, The valve body includes a valve seat (1), a connecting ring (2) for connecting to the battery package is fixedly connected to the lower part of the valve seat (1), an upper convex ring (3) located above the battery package is provided on the upper part of the valve seat (1), a chamber (7) is connected to the lower part of the connecting ring (2), the catalyst rod (8) is housed in the chamber (7), a plurality of vent holes (9) are provided on the side wall of the chamber (7) and the side wall of the connecting ring (2), a connecting ring (4) adapted to the catalyst rod (8) is provided in the center of the upper convex ring (3), a gas discharge chamber (5) is also formed inside the upper convex ring (3), a valve cover (6) is provided on the top of the upper convex ring (3), a drain hole (10) communicating with the chamber (7) and the inside of the battery is provided at the bottom of the chamber (7), a condensate ring (22) is provided inside the connecting ring (2), and the condensate ring (22) communicates with the chamber (7) and the valve seat (1).

3. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, A rubber cap valve (11) is provided above the connecting ring (4). The rubber cap valve (11) is configured to be electrically connected to the battery to perform opening and closing actions according to the internal air pressure of the battery.

4. A hydrogen-oxygen composite valve for batteries according to claim 3, characterized in that, A filter plate (12) is provided in the upper part of the gas discharge chamber (5) and the upper part of the condensate ring (22), and the filter plate (12) is located above the cap valve (11).

5. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, The bottom of the chamber (7) is provided with a buffer pad (13), which is elastic and is used to support and buffer the catalyst rod (8).

6. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, The side of the connecting ring (2) is provided with a plurality of L-shaped snap-fit ​​brackets (14), the shape of which is adapted to the mounting part of the battery package, and one side of which is an inclined guide surface.

7. A hydrogen-oxygen composite valve for batteries according to claim 6, characterized in that, Each of the snap-fit ​​brackets (14) has a first elastic snap-fit ​​ring (15) and a second elastic snap-fit ​​ring (16) respectively provided on two adjacent sides. Both the first elastic snap-fit ​​ring (15) and the second elastic snap-fit ​​ring (16) have elastic deformation capability.

8. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, The lower surface of the valve cover (6) is fixedly connected with a plurality of limiting ribs (17), and the bottom end of each limiting rib (17) extends with a positioning rib (18). The top surface of the upper convex ring (3) is provided with a connecting hole (19) that is compatible with the positioning rib (18).

9. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, The side of the connecting ring (2) is fitted with a sealing ring (20), which is an elastic sealing element.

10. A hydrogen-oxygen composite valve for batteries according to claim 2, characterized in that, The upper convex ring (3) has multiple reinforcing ribs (21) on its side, and the reinforcing ribs (21) are connected to the valve seat (1).

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