Battery cover with integrated safety valve

Abstract

The utility model relates to a battery cover with a one-piece safety valve, which comprises a battery cover, and the one-piece safety valve is arranged in the battery cover; the one-piece valve comprises a safety valve and a plurality of valve bodies communicated with one another, and an air pressure balance structure is formed between the safety valve and the valve bodies. The one-piece valve is adopted, so that gas in each valve body can be uniformly exhausted through the arranged safety valve, the purpose of uniform exhaust can be realized only by arranging one safety valve, the consistency of each battery monomer is also ensured, the service life of the battery is prolonged, and the whole structure is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover with a connected safety valve. Background Art

[0002] The interior of the battery is composed of lead electrodes and electrolyte. When the battery is in the process of charging and discharging, the positive and negative electrodes react with the electrolyte at the same time, and oxygen and hydrogen will be produced in the process. Most of the gases will recombine inside the battery to form water and be recycled repeatedly. However, as charging progresses, the battery voltage increases and the air pressure also increases. When it reaches a certain value, a small amount of gas will be discharged to the outside through the safety valve. When the air pressure drops, the safety valve will also close, so that the air pressure inside the battery is controlled at a relatively safe and stable position. In actual use, batteries that require a voltage of 4V or higher require two or more small single-cell batteries connected in series, and 12V requires six single-cell batteries connected in series. When the number of series connections is large, air pressure will be generated between each single cell in the battery and the air pressure between each single cell is uneven, which can easily lead to high and low air pressure. During the charging process, the amount and time of gas generated by the reaction between the electrode and the electrolyte are different. Therefore, the amount and time of gas discharged to the outside by each single cell are different, resulting in different air pressures between each single cell in the battery at the same time, and different amounts of gas discharged to the outside. Therefore, there are certain differences in water loss in the battery, which affects the consistency of the battery during recycling. For example, in the comparative document CN210156438U, a safety valve seat is provided on the cover plate, a safety valve hole is provided in the middle of the safety valve seat, and a safety valve is provided on the safety valve hole. Each battery single cell requires a safety valve for control. In the comparative document, there are problems such as uneven air pressure in each battery single cell and different gas emissions, which affects the consistency of the battery during recycling. Utility Model Content

[0003] The utility model aims at the problems of uneven air pressure and different gas exhaust volumes in battery cells in the prior art, and provides a battery cover with a one-piece safety valve that ensures consistency in the battery cells, specifically, the exhaust volume and exhaust time of each valve body are consistent.

[0004] A battery cover with a one-piece safety valve, wherein a one-piece valve is arranged in the battery cover; the one-piece valve comprises a safety valve and a plurality of valve bodies connected to each other, and a pressure balance structure is formed between the safety valve and the valve bodies. The valve bodies in the one-piece valve are connected together, and the gas inside the valve bodies is exchanged through the connection, so that the air pressure inside the one-piece valve is uniform; when the overall air pressure inside the one-piece valve is too high, the gas is exhausted to the outside through a safety valve arranged in the one-piece valve; thus, only one safety valve can be designed to achieve the purpose of uniform exhaust, and the air pressure of each battery cell is ensured to be uniform, thereby ensuring the consistency of the battery during the cycle use process.

[0005] Preferably, the safety valve is arranged in the middle of the one-piece valve, and the valve body on the one-piece valve is arranged in a symmetrical structure with the installation valve as the center. The one-piece valve is a symmetrical structure, and a safety valve is arranged in the middle, so that the gas generated by each valve body in the one-piece valve can be exhausted to the outside through the safety valve arranged in the middle; the safety valve is arranged in the middle to facilitate gas discharge, because the total path of gas movement is the shortest, and it also avoids accidents caused by excessive pressure on one side.

[0006] Preferably, the one-piece valve is provided with an one-piece valve seat, the safety valve is provided on the one-piece valve seat, and the safety valve is provided with an one-piece valve cover sheet. The safety valve is connected with each valve body in the one-piece valve, and when the air pressure inside the one-piece valve is too high, the safety valve can discharge the gas.

[0007] As a preferred method, the intervals between the valve bodies are consistent. Because the battery cover valve seats correspond to the valve bodies one by one, the intervals between the battery cover valve seats are also consistent, and the size and shape of each cell are the same, which facilitates the production of parts.

[0008] Preferably, a groove is provided in the battery cover, and a battery cover valve seat connected to the battery inner cavity is provided in the groove, and the battery cover valve seat is a through cylinder with a groove at the upper end. A groove adapted to the one-piece valve is provided on the battery cover, and a plurality of battery cover valve seats are provided inside the groove, and the one-piece valve can be installed on the battery cover valve seat.

[0009] Preferably, the battery cover valve seat corresponds to the valve body in the one-piece valve. Each battery valve seat corresponds to a valve body of the one-piece valve, and the channel in the battery cover valve seat can pass the generated gas, so that the gas can pass through the flow channel to the safety valve, and the safety valve then discharges the excess gas.

[0010] Preferably, each valve body in the connected valve is connected by a connecting pipe, and an air passage connecting each valve body is provided inside the connecting pipe. A connecting pipe is provided between the valve bodies, and the air passage provided in the connecting pipe allows gas to flow therethrough, connecting each valve body so that the air pressure in the device is balanced, thereby ensuring the consistency during the battery cycle.

[0011] Preferably, the integrated valve is sealed by a battery cover. A sealed environment can be formed by the matching sealing cover and sealing cover, so that the integrated valve is in a sealed environment.

[0012] The beneficial effects of the utility model are as follows: the air pressure inside the valve bodies is the same, and they are interconnected through connecting pipes, so that excess gas can be discharged through only one safety valve; the exhaust time of each valve body is the same; thereby, the utility model has consistency during the process of cyclic use, and only one safety valve is used to simplify the operation and increase safety; the consistency of the lifting device can also extend the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structural installation of the utility model.

[0014] Figure 2 It is a cross-sectional view of the utility model.

[0015] Figure 3 It is a structural diagram of the one-piece valve in the utility model.

[0016] Figure 4 This is a structural diagram of the utility model after installation.

[0017] In the figure: 1. battery cover; 2. battery cover; 3. battery cover valve seat; 4. one-piece valve; 5. one-piece valve seat; 6. safety valve; 7. one-piece valve cover; 8. valve body; 9. connecting pipe; 10. airway. DETAILED DESCRIPTION

[0018] Embodiment 1:

[0019] As the instruction manual Figure 1 As shown in , a battery cover with a one-piece safety valve, wherein the one-piece valve 4 is provided in the battery cover;

[0020] The one-piece valve includes a safety valve 6 and six valve bodies 8 that are interconnected, and an air pressure balance structure is formed between the safety valve and the valve body. The safety valve is arranged in the middle position of the one-piece valve, and the valve body on the one-piece valve is arranged in a symmetrical structure with the installation valve as the center. The one-piece valve is provided with a one-piece valve seat 5, the safety valve is arranged on the one-piece valve seat, and the safety valve is provided with a one-piece valve cover sheet 7. The intervals between the valve bodies are consistent. A groove is arranged in the battery cover, and a battery cover valve seat 3 that is connected to the inner cavity of the battery is arranged in the groove. The battery cover valve seat is a through cylinder with a groove at the upper end.

[0021] The battery cover valve seat corresponds to the valve body in the one-piece valve. The valve bodies in the one-piece valve are connected by a connecting pipe 9, and an air passage 10 connecting the valve bodies is provided inside the connecting pipe. The one-piece valve is sealed by a battery cover sheet 1. The valve bodies in the one-piece valve are connected together, and the gas inside the valve body is exchanged through the connection, so that the air pressure inside the one-piece valve is unified; when the overall air pressure inside the one-piece valve is too high, the gas is exhausted to the outside through a safety valve provided in the one-piece valve; thus, only one safety valve can be designed to achieve the purpose of unified exhaust, and the air pressure of each battery cell is ensured to be uniform, which ensures the consistency of the battery during the cycle use.

[0022] As the instruction manual Figure 2As shown in the figure, the gas flows out from the battery cover valve body 3 arranged in the groove of the battery cover 2, and the gas circulates with each other through the flow channel formed by the conjoined valve 4 and the battery cover valve body and the air channel 10 arranged in the connecting pipe 9; when the gas pressure inside the conjoined valve is too high, the gas generated by each valve body 8 will flow out from the set safety valve 6, and the safety valve is installed on the conjoined valve seat 5, and is sealed with a conjoined valve cover sheet 7; the valve caps of each valve body in the conjoined valve are connected, and a connecting hole is designed on the valve cap, and the connecting hole is connected to the connecting pipe, so that the various valve bodies are connected together to form a conjoined valve; the connecting pipe and each valve body are sealed, and the connecting pipe and the valve body are integrally formed to avoid leakage due to cracks; an air channel is arranged in the connecting pipe, which is connected with the inside of the valve body and the inside of the safety valve, and the gas can flow through the through pipe body in the battery cover valve seat through the channel and flow into the safety valve; when the internal air pressure of the safety valve is too high, the safety valve uniformly discharges the gas.

[0023] The utility model can be used in environments with different voltages to balance the consistency between cells; the environment in which it is used requires a battery with a voltage exceeding 4V and a cell number of more than 2 cells. Because the utility model uses a conjoined valve 4 to solve the problem of different air pressures between multiple cells, it needs to be used in batteries with multiple cells.

[0024] In the use of 12V series batteries, 6 valve bodies 8 are required, and the safety valve 6 is arranged between the 6 valve bodies, with 3 valve bodies on the left and right, forming a symmetrical structure; the valve bodies and the safety valve are arranged linearly, and are connected by a connecting pipe 9 to form an integrated structure; the valve body is arranged on the battery cover valve seat 3, and the gas will flow into the valve bodies through the battery cover valve seat, and the valve body will transport the gas to the safety valve in the middle of the connected valve through the air channel 10 set in the connecting pipe, and the safety valve will discharge the gas, so that the air pressure of each valve body of the connected valve is consistent, ensuring the consistency between the valve bodies; improving the consistency of the battery can improve the battery cycle life.

[0025] Setting the safety valve 6 in the middle position of the one-piece valve 4 can protect the safety of the entire one-piece valve and avoid accidents caused by excessive pressure on one side; and installing it in the middle position can ensure that there are no dead corners in the one-piece valve, which will affect the normal operation of the one-piece valve; therefore, installing the safety valve in the center position of the one-piece valve can ensure the sensitivity and working efficiency of the safety valve, and at the same time can better protect the overall safety of the one-piece valve.

[0026] The battery cover 2 is provided with a groove adapted to the one-piece valve 4, and there are several battery cover valve seats 3 inside the groove, on which the one-piece valve can be installed; the battery cover valve seat is 6 through cylinders with grooves, the groove on the upper end face of the through cylinder is through, and a non-through long strip groove is arranged under the through groove; the through cylinder can discharge gas from the hole in the middle, and the gas can be exchanged through the channel formed by the groove and the one-piece valve, so that the air pressure inside the one-piece valve is uniform; the one-piece valve is connected to the safety valve 6. The groove on the battery cover for placing the one-piece valve can also play the role of reinforcing ribs to improve the structural strength of the device; and all edges on the battery cover are rounded to reduce stress concentration and protect the safety of users.

[0027] Each valve body 8 is connected by a connecting pipe 9, which allows the gas to flow between the valve bodies; the connecting pipe is a through-pipe with an airway 10 inside, which is connected to each valve body and a safety valve 6 to balance the air pressure generated by each monomer when each monomer is charged; the inner wall of the airway in the connecting pipe is smooth, which reduces the friction generated by the gas with the inside of the connecting pipe when the gas passes through, so that the gas can quickly reach the safety valve.

[0028] The volume and shape of each valve body 8 in the one-piece valve 4 are the same, all of which are cylindrical and adapted to the size of the battery cover valve seat 3; the battery cover valve seat and the valve bodies in the one-piece valve are located on the same straight line, and the linear design can facilitate the flow of gas in the airway 10 in the connecting pipe 9, and the flow rate of the gas will not be affected by the turning. The battery cover valve seat is a through cylinder as a whole, one end of which is located inside the battery cover 2 and is connected to the inner cavity of the battery. The gas generated in the inner cavity of the battery can flow into the valve body through the battery cover valve seat.

[0029] The utility model is designed with 6 valve bodies 8, which together with a safety valve 6 arranged in the middle form a conjoined valve 4; the 6 valve bodies correspond to 6 battery cover valve seats 3 one by one, and the valve bodies and the valve bodies and the safety valves are connected through connecting pipes 9; the conjoined valve is a symmetrical structure.

[0030] As the instruction manual Figure 3 The one-piece valve seat 5 shown in the figure is also a through cylinder with four through grooves on the upper end, which are evenly distributed on the one-piece valve seat; the size of the safety valve 6 is adapted to the one-piece valve seat, and a through hole is provided in the middle of the one-piece valve cover sheet 7, which is arranged above the safety valve, and is covered with a battery cover sheet 1, and the battery cover sheet and the battery cover 2 form a sealing structure.

[0031] The safety valve 6 is fixed relative to the battery cover 1, so that after the safety valve is assembled, it will not rise during the exhaust process, and the deformation is small, which can extend the service life of the safety valve; the safety valve can be installed at the same time as the battery cover, avoiding the situation where the safety valve is missed during production and maintenance.

[0032] There are many ways to fix the safety valve 6 on the battery cover 1. The bottom of the safety valve can be directly fixed on the battery cover with glue. However, in order to further reduce the volume of the battery and facilitate the disassembly and assembly of the safety valve, the back of the battery cover is provided with a mounting groove that matches the safety valve, and the top of the safety valve is embedded in the mounting groove. The opening edge of the safety valve is flush with the back of the cover. The safety valve is completely embedded in the cover, further reducing the overall size of the battery.

[0033] The battery cover 2 and the one-piece valve 4 are integrally formed, which can prevent cracks from appearing on the battery cover and the one-piece valve during processing, thereby affecting the sealing of the device; the one-piece forming simplifies the production steps of the battery cover and the battery cover sheet in the device. The overall design makes the manufacturing and installation process of the components simple, the structural sealing is good, and the yield rate is improved.

[0034] As the instruction manual Figure 4 As shown in the figure, the thickness of the battery cover sheet 1 is 2mm-3mm, and the depth of the mounting groove for mounting the battery cover sheet on the battery cover 2 is 2mm-2.5mm. The thickness of the battery cover sheet can be appropriately increased to facilitate the embedding of the safety valve. The battery cover sheet is embedded in the battery cover, making the structure of the device of the utility model more compact.

[0035] Embodiment 2:

[0036] A battery cover with a one-piece safety valve comprises a battery cover 2, wherein a one-piece valve 4 is arranged in the battery cover; the one-piece valve comprises a safety valve 6 and 12 valve bodies 8 which are interconnected, and a pressure balance structure is formed between the safety valve and the valve bodies. The safety valve is arranged in the middle of the one-piece valve, and the valve bodies on the one-piece valve are arranged in a symmetrical structure with the mounting valve as the center. A one-piece valve seat 5 is arranged on the one-piece valve, and the safety valve is arranged on the one-piece valve seat, and a one-piece valve cover sheet 7 is arranged on the safety valve. The intervals between the valve bodies are consistent. A groove is arranged in the battery cover, and a battery cover valve seat 3 which is connected to the inner cavity of the battery is arranged in the groove, and the battery cover valve seat is a through cylinder with a groove at the upper end. The battery cover valve seat corresponds to the valve body in the one-piece valve one by one. The valve bodies in the one-piece valve are connected through a connecting pipe 9, and an air passage 10 which is connected to the valve bodies is arranged inside the connecting pipe. The valve bodies in the one-piece valve are connected together, and the gas inside the valve body is exchanged through the connection point, so that the air pressure inside the one-piece valve is unified; when the overall air pressure inside the one-piece valve is too high, the gas is exhausted to the outside through a safety valve provided in the one-piece valve; thus, only one safety valve is designed to achieve the purpose of unified exhaust, and the uniform air pressure of each battery cell is ensured, thereby ensuring the consistency of the battery during recycling.

[0037] When used in 24V series batteries, only one safety valve 6 is still required in the connected valve 4, and 12 valve bodies are required; the safety valve is arranged in the middle of the valve body, with 6 valve bodies on the left and right; the valve body and the safety valve in the connected valve are arranged linearly, and are connected by a connecting pipe 9 to form a connected structure.

[0038] The one-piece valve 4 is arranged on the battery cover valve seat 3, and each battery valve seat corresponds to the valve body 8 one by one; 12 battery cover valve seats are arranged on the battery cover; and the battery cover valve seats are arranged in the grooves in the battery cover.

[0039] The one-piece valve 4 is installed in the groove of the battery cover 2, and a battery cover sheet 1 is arranged on the top to seal the one-piece valve; thereby, external air, dust, water or harmful substances can be prevented from entering the battery body, and at the same time, the structure in the internal one-piece valve is effectively protected from the influence of external light and heat, preventing the aging of the structure and improving the service life of the battery.

[0040] The safety valve 6 is arranged on the integrated valve seat 5, and the air inlet of the safety valve is the air outlet of each valve body 8; the excess gas is discharged through the safety valve to prevent the battery from exploding, so that the internal pressure of the battery is within a reasonable range, ensuring the safety of the battery.

[0041] The battery cover valve seat 3 in the battery cover 2 corresponds one to one with each valve body 8 in the integrated valve 4; a plate group is distributed under the battery cover valve seat, and each valve body is separated by a partition; this design makes the performance of the plate group between each valve body stable and optimizes the current distribution of the plate.

[0042] The material of the battery cover 2 and the battery cover sheet 1 can be aluminum alloy, because aluminum alloy is light, strong and tough; using aluminum alloy as the material of the battery cover sheet and the battery cover can effectively reduce the weight of the battery; stainless steel can also be used as the material of the battery cover sheet and the battery cover. Stainless steel has the characteristics of high strength, high hardness and easy plasticity, which can make the battery cover have a very high structural strength and effectively protect the battery.

[0043] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. A battery cover with an integrated safety valve, comprising a battery cover (2), characterized in that: A conjoined valve (4) is provided in the battery cover; The one-piece valve comprises a safety valve (6) and a plurality of valve bodies (8) which are interconnected, and a gas pressure balance structure is formed between the safety valve and the valve bodies.

2. The battery cover with integrated safety valve according to claim 1, characterized in that: The safety valve (6) is arranged at the middle position of the one-piece valve (4), and the valve body on the one-piece valve is arranged in a symmetrical structure with the mounting valve as the center.

3. The battery cover with integrated safety valve according to claim 2, characterized in that: The one-piece valve (4) is provided with a one-piece valve seat (5), the safety valve (6) is provided on the one-piece valve seat, and the safety valve is provided with a one-piece valve cover sheet (7).

4. The battery cover with integrated safety valve according to claim 1, characterized in that: The intervals between the valve bodies (8) are consistent.

5. The battery cover with integrated safety valve according to claim 1, characterized in that: A groove is provided in the battery cover (2), and a battery cover valve seat (3) communicating with the inner cavity of the battery is provided in the groove. The battery cover valve seat is a through cylinder with a groove provided at the upper end.

6. The battery cover with integrated safety valve according to claim 5, characterized in that: The battery cover valve seat (3) corresponds one to one with the valve body (8) in the one-piece valve (4).

7. The battery cover with integrated safety valve according to claim 1, characterized in that: The valve bodies (8) in the connected valve (4) are connected via a connecting pipe (9), and an air passage (10) connecting the valve bodies is provided inside the connecting pipe.

8. The battery cover with integrated safety valve according to any one of claims 1 to 7, characterized in that: The integrated valve (4) is sealed by a battery cover (1).

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