Explosion-proof valve integrated on upper cover and battery pack

Abstract

The utility model discloses an explosion-proof valve integrated on an upper cover and a battery pack, and the explosion-proof valve comprises an upper cover body which is provided with an accommodating cavity; the explosion-proof valve body comprises a pressure relief pipeline and a breathable film, the pressure relief pipeline and the upper cover body are integrally formed, one end of the pressure relief pipeline is communicated with the interior of the containing cavity, the other end of the pressure relief pipeline is communicated with the exterior of the containing cavity, and the breathable film is assembled at one end of the pressure relief pipeline. According to the utility model, the explosion-proof valve body and the upper cover body can be integrated, so that the number of parts is reduced, the cost is reduced, the assembly procedures can be reduced, the production efficiency is improved, the problem of air tightness of assembly between the explosion-proof valve body and the upper cover body is avoided, the risk of leakage is reduced, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, and in particular to an explosion-proof valve integrated in an upper cover and a battery pack. Background Art

[0002] At present, battery packs in the industry usually use separate explosion-proof valves. This design has the following problems:

[0003] First, the separate explosion-proof valve component is expensive and requires additional materials and manufacturing processes, which increases the cost of the entire battery pack.

[0004] Secondly, the separate explosion-proof valve needs to be assembled with the upper cover of the battery pack, which increases the assembly process and complexity of the battery pack. During the assembly process, it is necessary to ensure the sealing performance between the explosion-proof valve and the upper cover to prevent gas leakage inside the battery pack. This requires additional processes and testing methods, increasing production costs and time. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art, the utility model provides an explosion-proof valve and a battery pack integrated in an upper cover, which can solve the problems of high component costs and multiple assembly processes.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] An explosion-proof valve integrated in an upper cover comprises: an upper cover body having a containing cavity; an explosion-proof valve body, the explosion-proof valve body comprising a pressure relief pipe and a breathable membrane, the pressure relief pipe and the upper cover body being integrally formed, one end of the pressure relief pipe being connected to the inside of the containing cavity, the other end of the pressure relief pipe being connected to the outside of the containing cavity, and the breathable membrane being assembled on one end of the pressure relief pipe.

[0008] By adopting the above solution, the explosion-proof valve body and the upper cover body can be integrated into one, thereby reducing the number of parts and reducing costs. It can also reduce the assembly process, improve production efficiency, avoid the problem of assembly airtightness between the two, and thus reduce the risk of leakage and improve reliability.

[0009] Furthermore, one side of the accommodating cavity is opened to form an opening, and the side of the accommodating cavity opposite to the opening is the end face of the upper cover body, and the pressure relief pipe includes a first pipe and a second pipe, the first pipe is vertically connected to the end face, and the second pipe is vertically connected to the first pipe.

[0010] By adopting the above scheme, the second pipe is vertically connected to the first pipe, so that the airflow encounters greater resistance when passing through the explosion-proof valve, thereby reducing the pressure of the airflow, and preventing the airflow from flowing back, thereby avoiding the explosion wave from propagating in the opposite direction from the explosion-proof valve. At the same time, the 90° bend can also reduce the noise generated when the airflow passes through the explosion-proof valve, thereby helping to improve the reliability of the explosion-proof valve and the safety of personnel.

[0011] Furthermore, the end surface of the upper cover body is connected to multiple side surfaces, the second pipe is passed through the side surface adjacent to it, and the second pipe is at least partially embedded in the side surface, and the end of the second pipe extending through the side surface to the outside of the accommodating cavity forms a pressure relief port.

[0012] By adopting the above solution, when the internal pressure of the battery pack exceeds the set value, the breathable membrane will be broken, and the pressure inside the battery pack can be released through the pressure relief port.

[0013] Furthermore, a reinforcement pipe is arranged in the second pipe, and the reinforcement pipe at least partially extends into the first pipe. An air outlet valve is arranged at one end of the reinforcement pipe close to the first pipe.

[0014] By adopting the above solution, the thickness of the second pipeline can be increased by arranging a reinforcing pipeline, thereby increasing its own strength, thereby improving the safety and reliability of the explosion-proof valve.

[0015] Furthermore, the air outlet valve comprises at least one supporting beam, and an air vent is formed between the supporting beam and the reinforcing pipe.

[0016] By adopting the above solution, the support beam of the gas outlet valve is used to increase the stability and reliability of the explosion-proof valve, and is usually composed of two crossed metal support beams or three crossed metal support beams.

[0017] Furthermore, a conical block is provided on one side of the support beam facing the accommodating cavity.

[0018] By adopting the above scheme, the conical block is used to control the flow and direction of the airflow. When the airflow passes through the conical structure, the speed of the airflow will increase, thereby reducing the pressure of the airflow, so that the airflow is dispersed by the support beam and discharged through multiple vents, achieving the effect of reducing the pressure of the airflow.

[0019] Furthermore, a stepped assembly platform is formed between one end of the reinforcement pipe facing the accommodating cavity and the first pipe, and the air-permeable membrane is arranged on the stepped assembly platform.

[0020] By adopting the above scheme, the assembly of the breathable membrane is facilitated.

[0021] Furthermore, the opening edge of the accommodating cavity is provided with a mounting lip plate extending out of the accommodating cavity, and the end of the second pipe passing through the side surface does not protrude beyond the end of the mounting lip plate.

[0022] By adopting the above solution, the pressure relief port of the second pipeline can be protected, and the risk of touching the pressure relief port can be reduced, so that it will not be easily bumped and cause damage to the explosion-proof valve.

[0023] Furthermore, the radius of the inner wall of the second pipe gradually increases in a direction away from the accommodating cavity.

[0024] By adopting the above solution, the flow area of ​​the pressure relief port can be increased, thereby accelerating the speed of pressure release and improving the response speed and efficiency of the explosion-proof valve.

[0025] A battery pack comprises a battery module, a battery box and an explosion-proof valve integrated in an upper cover, wherein the battery module comprises a plurality of battery cells and a pressure relief valve mounted on the battery cells, and the pressure relief valve is connected to one end of the pressure relief pipe.

[0026] By adopting the above solution, the integrated design of the explosion-proof valve and the upper cover body can improve the production efficiency of the battery pack, reduce production costs, and reduce assembly processes.

[0027] In summary, the explosion-proof valve and battery pack integrated in the upper cover provided by the utility model have the following technical effects:

[0028] 1. Reduce the number of parts: By integrating the explosion-proof valve body with the upper cover body, the number of parts can be reduced and the cost can be reduced. This can reduce the time and cost of manufacturing and assembly and improve production efficiency.

[0029] 2. Improve reliability: Integrating the explosion-proof valve body and the upper cover body can avoid the problem of airtightness between the two, reduce the risk of leakage, and improve reliability. This can improve the quality and safety of the product and reduce the cost of failure and maintenance.

[0030] 3. Improve production efficiency: Integrating the explosion-proof valve body and the upper cover body can reduce assembly processes and improve production efficiency. This can reduce production cycles and costs and improve product competitiveness.

[0031] 4. Improve user experience: Integrating the explosion-proof valve body with the upper cover body can reduce the volume and weight of the product and improve user experience. This can make the product more portable and easy to use, and improve user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the outer structure of the upper cover body of an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the inner structure of the upper cover body of the embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the enlarged structure of the explosion-proof valve body of an embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the partial disassembly structure of the explosion-proof valve body of the embodiment of the utility model;

[0036] Figure 5 It is a schematic cross-sectional structure diagram of the explosion-proof valve body according to an embodiment of the utility model.

[0037] Among them, the meanings of the figure numbers are as follows: 1. upper cover body; 11. accommodating cavity; 12. opening; 13. end face; 14. side; 15. assembly lip plate; 2. explosion-proof valve body; 21. pressure relief pipe; 211. first pipe; 212. second pipe; 22. breathable membrane; 23. pressure relief port; 3. reinforcement pipe; 31. air outlet valve; 311. support beam; 312. vent; 32. conical block; 4. stepped assembly table. DETAILED DESCRIPTION

[0038] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] The embodiments of the present invention refer to Figure 1-Figure 5 As shown, an explosion-proof valve integrated in an upper cover is disclosed, including an upper cover body 1 and an explosion-proof valve body 2 that are integrally formed. The integrated design reduces the number of parts and reduces costs. It can also reduce assembly steps, improve production efficiency, avoid assembly airtightness issues between the two, and thereby reduce the risk of leakage and improve reliability.

[0043] In a specific embodiment, see Figure 1-2 As shown, the upper cover body 1 has a housing cavity 11, one side of the housing cavity 11 is open to form an opening 12, and the side of the housing cavity 11 opposite to the opening 12 is the end face 13 of the upper cover body 1, and the explosion-proof valve body 2 includes a pressure relief pipe 21 and a breathable membrane 22, one end of the pressure relief pipe 21 is connected to the inside of the housing cavity 11, and the other end of the pressure relief pipe 21 is connected to the outside of the housing cavity 11, and the breathable membrane 22 is assembled on one end of the pressure relief pipe 21. For details, refer to Figure 4 As shown, the pressure relief pipe 21 includes a first pipe 211 and a second pipe 212, the first pipe 211 is vertically connected to the end face 13, and the second pipe 212 is vertically connected to the first pipe 211. The vertical connection of the second pipe 212 to the first pipe 211 can make the airflow encounter greater resistance when passing through the explosion-proof valve, thereby reducing the pressure of the airflow, and can also prevent the airflow from flowing back, thereby avoiding the explosion wave from propagating in the opposite direction from the explosion-proof valve. At the same time, the 90° bend can also reduce the noise generated when the airflow passes through the explosion-proof valve, thereby helping to improve the reliability of the explosion-proof valve and the safety of personnel.

[0044] See also Figure 1 and Figure 4 As shown, the end face 13 of the upper cover body 1 is adjacent to a plurality of side faces 14, the second pipe 212 is arranged through the side face 14 adjacent thereto, and the second pipe 212 is at least partially embedded in the side face 14, and the end of the second pipe 212 extending through the side face 14 to the outside of the accommodating cavity 11 forms a pressure relief port 23, when the internal pressure of the battery pack exceeds the set value, the air permeable membrane 22 will be broken, and the pressure inside the battery pack can be released through the pressure relief port 23. In some embodiments, the second pipe 212 is vertically connected to the side face 14, when the angle between the side face 14 and the end face 13 is greater than 90°, the angle between the first pipe 211 and the second pipe 212 can be appropriately adjusted to correspond to the angle between the side face 14 and the end face 13, so as to achieve a better adaptation effect, of course, in other embodiments, the angle between the side face 14 and the end face 13 may not correspond to the angle between the first pipe 211 and the second pipe 212, and can be changed according to actual conditions, and this implementation does not make specific limitations.

[0045] In some embodiments, see Figure 4 As shown, in order to improve the pressure relief strength of the second pipe 212 to avoid explosion during pressure relief, a reinforcement pipe 3 is provided in the second pipe 212, and the reinforcement pipe 3 at least partially extends into the first pipe 211. An outlet valve 31 is provided at one end of the reinforcement pipe 3 close to the first pipe 211. The thickness of the second pipe 212 can be increased by providing the reinforcement pipe 3, and its own strength can be provided, thereby improving the safety and reliability of the explosion-proof valve. In one embodiment, the reinforcement pipe 3 and the second pipe 212 are integrally manufactured and formed, which can save assembly processes. In other embodiments, the specific assembly method between the reinforcement pipe 3 and the second pipe 212 is not limited.

[0046] In order to better divert and reduce the pressure of the decompressed gas, optional, refer to Figure 4 As shown, the outlet valve 31 includes at least one support beam 311, and a vent hole 312 is formed between the support beam 311 and the reinforcement pipe 3. The support beam 311 of the outlet valve 31 is used to increase the stability and reliability of the explosion-proof valve, and is usually composed of two crossed metal support beams 311 or three crossed metal support beams 311. In one embodiment, three support beams 311 are provided, one end of the three support beams 311 is connected to the axis of the reinforcement pipe 3, and the other end of the three support beams 311 is connected to the inner wall of the reinforcement pipe 3. The connection method of the two ends of the support beam 311 includes but is not limited to integral connection, welding or bonding. A conical block 32 is provided at the connection of the three support beams 311 on the side facing the accommodating cavity 11. The surface of the conical block 32 is provided with a diverter groove arranged along the axial direction of the conical block 32. The conical block 32 is used to control the flow and direction of the airflow. When the airflow passes through the conical structure, the speed of the airflow increases, thereby reducing the pressure of the airflow. The diverter groove disperses the airflow and discharges it through multiple vents 312, achieving the effect of reducing the pressure of the airflow. In other embodiments, the number of the support beams 311 is not specifically limited, so the shape of the spliced ​​support beams 311 includes but is not limited to a cross, a triangle or a tic-tac-toe shape.

[0047] See also Figure 4 As shown, a stepped assembly platform 4 is formed between the end of the reinforcement pipe 3 facing the accommodating cavity 11 and the first pipe 211, and the breathable membrane 22 is arranged on the stepped assembly platform 4, which facilitates the assembly of the breathable membrane 22. In some embodiments, the breathable membrane 22 is connected to the stepped assembly platform 4 by hot melting or ultrasonic welding.

[0048] In some embodiments, see Figure 1 , Figure 2 and Figure 5As shown, the edge of the opening 12 of the accommodating cavity 11 is provided with an assembly lip plate 15 extending out of the accommodating cavity 11. In order to make the assembly lip plate 15 protect the pressure relief port 23, the end of the second pipe 212 passing through the side surface 14 is designed not to protrude from the end of the assembly lip plate 15, which can protect the pressure relief port 23 of the second pipe 212 and reduce the risk of touching the pressure relief port 23, so that it will not be easily bumped and cause damage to the explosion-proof valve.

[0049] Optionally, in order to improve the response speed and efficiency of the explosion-proof valve, the inner wall radius of the second pipe 212 gradually increases in a direction away from the accommodating chamber 11. Figure 5 As shown, by only changing the inner wall radius of the portion of the second pipe 212 close to the pressure relief port 23, the flow area of ​​the pressure relief port 23 can be increased, thereby accelerating the speed of pressure release and improving the response speed and efficiency of the explosion-proof valve.

[0050] The utility model also relates to a battery pack, including a battery module, a battery box and an explosion-proof valve integrated in an upper cover, wherein the battery module includes a plurality of battery cells and a pressure relief valve mounted on the battery cells, wherein the pressure relief valve is connected to one end of the pressure relief pipe 21, and the explosion-proof valve and the upper cover body 1 are integrally designed to improve the production efficiency of the battery pack, reduce production costs, and reduce assembly processes.

[0051] In summary, the explosion-proof valve and battery pack integrated in the upper cover provided by the utility model have the following technical effects:

[0052] 1. Reduce the number of parts: By integrating the explosion-proof valve body 2 with the upper cover body 1, the number of parts can be reduced and the cost can be reduced. This can reduce the time and cost of manufacturing and assembly and improve production efficiency.

[0053] 2. Improve reliability: Integrating the explosion-proof valve body 2 and the upper cover body 1 into one body can avoid the problem of airtightness between the two, reduce the risk of leakage, and improve reliability. This can improve the quality and safety of the product and reduce the cost of failure and maintenance.

[0054] 3. Improve production efficiency: Integrating the explosion-proof valve body 2 and the upper cover body 1 into one can reduce assembly procedures and improve production efficiency. This can reduce production cycles and costs and improve product competitiveness.

[0055] 4. Improve user experience: Integrating the explosion-proof valve body 2 with the upper cover body 1 can reduce the volume and weight of the product and improve user experience. This can make the product more portable and easy to use, and improve user satisfaction.

[0056] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. An explosion-proof valve integrated in an upper cover, characterized in that: include: An upper cover body (1), the upper cover body (1) having a receiving cavity (11); An explosion-proof valve body (2), the explosion-proof valve body (2) comprising a pressure relief pipe (21) and a breathable membrane (22), the pressure relief pipe (21) and the upper cover body (1) being integrally formed, one end of the pressure relief pipe (21) being connected to the interior of the accommodating cavity (11), the other end of the pressure relief pipe (21) being connected to the exterior of the accommodating cavity (11), and the breathable membrane (22) being assembled on one end of the pressure relief pipe (21).

2. The explosion-proof valve integrated in the upper cover according to claim 1, characterized in that: One side of the accommodating cavity (11) is open to form an opening (12); the side of the accommodating cavity (11) opposite to the opening (12) is an end surface (13) of the upper cover body (1); the pressure relief pipe (21) comprises a first pipe (211) and a second pipe (212); the first pipe (211) is vertically connected to the end surface (13); and the second pipe (212) is vertically connected to the first pipe (211).

3. The explosion-proof valve integrated in the upper cover according to claim 2, characterized in that: The end surface (13) of the upper cover body (1) is adjacent to a plurality of side surfaces (14); the second pipe (212) is passed through the side surfaces (14) adjacent thereto, and the second pipe (212) is at least partially embedded in the side surfaces (14); the end portion of the second pipe (212) extending through the side surfaces (14) to the outside of the accommodating cavity (11) forms a pressure relief port (23).

4. The explosion-proof valve integrated in the upper cover according to claim 2, characterized in that: A reinforced pipe (3) is arranged in the second pipe (212), and the reinforced pipe (3) at least partially extends into the first pipe (211). An air outlet valve (31) is arranged at one end of the reinforced pipe (3) close to the first pipe (211).

5. The explosion-proof valve integrated in the upper cover according to claim 4, characterized in that: The air outlet valve (31) comprises at least one supporting beam (311), and a vent hole (312) is formed between the supporting beam (311) and the reinforced pipe (3).

6. The explosion-proof valve integrated in the upper cover according to claim 5, characterized in that: A conical block (32) is provided on one side of the support beam (311) facing the accommodating cavity (11).

7. The explosion-proof valve integrated in the upper cover according to claim 4, characterized in that: A stepped assembly platform (4) is formed between one end of the reinforcement pipe (3) facing the accommodating cavity (11) and the first pipe (211), and the air permeable membrane (22) is arranged on the stepped assembly platform (4).

8. The explosion-proof valve integrated in the upper cover according to claim 3, characterized in that: The edge of the opening (12) of the accommodating cavity (11) is provided with a mounting lip plate (15) extending outward from the accommodating cavity (11), and the end of the second pipe (212) passing through the side surface (14) does not protrude beyond the end of the mounting lip plate (15).

9. The explosion-proof valve integrated in the upper cover according to claim 2, characterized in that: The radius of the inner wall of the second pipe (212) gradually increases in a direction away from the accommodating chamber (11).

10. A battery pack, characterized in that: It comprises a battery module, a battery box and an explosion-proof valve integrated in the upper cover as described in any one of claims 1 to 9, wherein the battery module comprises a plurality of battery cells and a pressure relief valve mounted on the battery cells, and the pressure relief valve is connected to one end of the pressure relief pipe (21).

Images