Inflation device for explosion-proof valve of battery pack

Abstract

The invention discloses a battery pack explosion-proof valve inflation device, and relates to the technical field of explosion-proof valve inflation, the battery pack explosion-proof valve inflation device comprises an inflation device, the side surface of the inflation device is provided with a group of inflation holes, the outer surface of the top of the inflation device is provided with a hexagonal limiting groove, and the hexagonal limiting groove is internally provided with a hexagonal limiting block; a fixing nut is arranged on the outer surface of the side, away from the inflation device, of the hexagonal limiting block, an anti-explosion valve limiting head is arranged on the outer surface of the side, close to the inflation device, of the hexagonal limiting block, a movable handle is arranged at the tail of the inflation device, and a sliding part is arranged in the inflation device. A set of rubber layers are evenly arranged on the inner surface of the side, close to the hexagonal limiting block, of the sliding piece, the outer surface of the anti-explosion valve limiting head is tightly attached to the inner surface of the hexagonal limiting block, through cooperation of the structure, the plugging capacity of the butt joint position of the anti-explosion valve and the inflation device can be effectively enhanced, the air tightness is effectively improved, and the service life of the anti-explosion valve is prolonged. And the efficiency of the battery pack air tightness test is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of explosion-proof valve inflation, and in particular relates to an explosion-proof valve inflation device for a battery pack. Background Art

[0002] With the popularization of new energy storage, the demand for battery packs is also increasing. Battery packs are an important component of energy storage and one of the key factors in determining the quality of energy storage. In order to better manage the production of battery packs, various tests must be conducted on the battery packs. One of the tests is the battery pack air tightness test to detect the dust and water resistance of the battery pack. The traditional test is to inflate the battery pack. The battery pack is normally equipped with an explosion-proof valve. During the test, the inflation pipe of the air tightness test device is connected to the explosion-proof valve, and the gas enters the battery pack from the explosion-proof valve.

[0003] In the process of implementing this application, it was found that the technology has the following problems: when connecting the traditional inflation device and the explosion-proof valve, the connection between the inflation tube and the explosion-proof valve must be reinforced with adhesive material, which takes a lot of time to apply and clean the adhesive material, reducing the test efficiency and consuming time and effort.

[0004] For this purpose, a battery pack explosion-proof valve inflation device is proposed. Summary of the invention

[0005] The purpose of the present invention is to effectively enhance the sealing ability of the joint between the explosion-proof valve and the inflation device, effectively improve the airtightness, and greatly improve the efficiency of the battery pack airtightness test. The present application provides a battery pack explosion-proof valve inflation device.

[0006] The technical solution adopted by the present invention is as follows: A battery pack explosion-proof valve inflation device, comprising an inflation device, a group of inflation holes are opened on the side of the inflation device, a hexagonal limit groove is arranged on the outer surface of the top of the inflation device, a hexagonal limit block is arranged inside the hexagonal limit groove, the inner surface of the hexagonal limit groove is limitedly engaged with the hexagonal limit block, and a fixing nut is arranged on the outer surface of the hexagonal limit block away from the inflation device; An explosion-proof valve limit head is arranged on the outer surface of one side of the hexagonal limit block close to the inflation device, a movable handle is arranged at the tail of the inflation device, a sliding member is arranged inside the inflation device, a group of rubber layers are evenly arranged on the inner surface of one side of the sliding member close to the hexagonal limit block, and the outer surface of the explosion-proof valve limit head is tightly fitted with the inner surface of the hexagonal limit block.

[0007] Furthermore, the outer surface of the sliding member is slidably connected to the inner surface of the inflatable device, three groups of second limiting rings are arranged in parallel on the periphery of the sliding member, and three groups of first limiting rings are evenly arranged on the inner surface of the inflatable device. A sealing layer is arranged on the inner surface of the inflatable device away from the hexagonal limiting groove, and the inner surface of the sealing layer is tightly fitted with the outer surface of the sliding member.

[0008] Furthermore, a plurality of groups of springs are arranged between the three groups of the first limiting rings and the corresponding second limiting rings.

[0009] Furthermore, an extrusion piece is arranged on the periphery of the movable handle close to the inflatable device, and an extrusion groove is arranged on the periphery of one side of the inflatable device close to the movable handle, and an outer surface of one side of the extrusion piece after rotation abuts against an end surface of the extrusion groove.

[0010] Furthermore, the hexagonal limiting block, the fixing nut and the explosion-proof valve limiting head are configured as an integrally formed structure.

[0011] Furthermore, an explosion-proof valve air inlet is provided on each outer surface of the hexagonal limit block, an explosion-proof valve air outlet is provided at the center of the fixing nut, and the gas passages of each group of the explosion-proof valve air inlet are connected with the gas passages of the explosion-proof valve air outlet.

[0012] Furthermore, a group of rotating rods are arranged between the inner surface of one side of the inflation device close to the movable handle, and a group of rotating limit blocks are arranged at the ends of both sides of the rotating rods.

[0013] Furthermore, the two groups of rotation limit blocks are rotationally connected to the inner surface of the inflatable device, the other end of the movable handle is fixedly connected to the outer periphery of the rotation rod, and a connection port is provided at the intersection of the rotation rod and the outer periphery of the movable handle.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, when the battery pack needs to be tested for air tightness, the movable handle is rotated to gradually straighten it downward, the extrusion piece squeezes the corresponding sliding piece and gradually pushes it forward, the rubber layer on the inner surface of the sliding piece fits tightly with the outer surface of the explosion-proof valve limit head, the rubber material will not damage the explosion-proof valve, so that the explosion-proof valve is compressed to effectively prevent air leakage, the inner surface of the hexagonal limit groove at the top of the inflation device is directly inserted into the hexagonal limit block to effectively enhance the sealing capacity of the joint between the explosion-proof valve and the inflation device, effectively improve the air tightness, and greatly improve the efficiency of the battery pack air tightness test.

[0015] 2. In the present invention, when the movable handle is rotated, the rotating limit blocks at both ends of the corresponding rotating rod are driven to rotate inside the inflation device, and the connecting port is used to ensure a stable connection between the rotating rod and the movable handle. When the movable handle is bent downward to a certain degree, one end face of the extrusion piece abuts against one end face of the extrusion groove and stops rotating. After the airtightness test is completed, the movable handle is rotated back, and due to the elastic effect of the spring, the second limit ring will gradually rebound, thereby gradually separating from the explosion-proof valve. The battery pack airtightness test device can realize the rapid and accurate docking of the battery pack explosion-proof valve and the inflation device, and can effectively enhance the sealing capacity of the docking point, effectively improve the airtightness, and the operation of the present invention is convenient and labor-saving, and the inflation device has a small size and can be operated in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the components after installation of the present invention; Figure 3 It is a structural schematic diagram of the explosion-proof valve assembly of the present invention; Figure 4 It is a structural schematic diagram of the clamping assembly of the present invention; Figure 5 is a cross-sectional view of some components of the present invention; Figure 6 For the present invention Figure 5 Detail of point A in the middle.

[0017] In the figure: 1-inflating device; 2-explosion-proof valve air inlet; 3-hexagonal limit block; 4-fixing nut; 5-movable handle; 6-explosion-proof valve limit head; 7-movable groove of sliding member; 8-hexagonal limit groove; 9-sliding member; 10-extrusion member; 11-inflating hole; 12-extrusion groove; 13-spring; 14-first limit ring; 15-second limit ring; 16-rotation limit block; 17-rotation rod; 18-connection port; 19-rubber layer; 20-explosion-proof valve outlet; 21-explosion-proof valve outlet; 22-sealing layer. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] Reference Figure 1-Figure 6, a battery pack explosion-proof valve inflation device, comprising an inflation device 1, a group of inflation holes 11 are opened on the side of the inflation device 1, a hexagonal limiting groove 8 is arranged on the outer surface of the top of the inflation device 1, a hexagonal limiting block 3 is arranged inside the hexagonal limiting groove 8, the inner surface of the hexagonal limiting groove 8 is limitedly engaged with the hexagonal limiting block 3, a fixing nut 4 is arranged on the outer surface of the hexagonal limiting block 3 away from the inflation device 1, an explosion-proof valve limiting head 6 is arranged on the outer surface of the hexagonal limiting block 3 close to the inflation device 1, a movable handle 5 is arranged at the tail of the inflation device 1, a sliding member 9 is arranged inside the inflation device 1, a group of rubber layers 19 are evenly arranged on the inner surface of the side of the sliding member 9 close to the hexagonal limiting block 3, and the outer surface of the explosion-proof valve limiting head 6 is tightly fitted with the inner surface of the hexagonal limiting block 3, specifically, through the cooperation of the above structure, the sealing ability of the joint between the explosion-proof valve and the inflation device can be effectively enhanced, the air tightness can be effectively improved, and the efficiency of the battery pack air tightness test can be greatly improved.

[0020] Reference Figure 1-Figure 6 The outer surface of the sliding member 9 is slidably connected to the inner surface of the inflatable device 1. Three groups of second limiting rings 15 are arranged in parallel on the periphery of the sliding member 9. Three groups of first limiting rings 14 are evenly arranged on the inner surface of the inflatable device 1. A sealing layer 22 is arranged on the inner surface of the inflatable device 1 away from the hexagonal limiting groove 8, and the inner surface of the sealing layer 22 is tightly fitted with the outer surface of the sliding member 9. Specifically, three groups of second limiting rings 15 are arranged on the periphery of the sliding member 9, which cooperate with the three groups of first limiting rings 14 on the inner surface of the inflatable device 1 to achieve precise rebound. The specific inner surface of the inflatable device 1 is also provided with a sealing layer 22, which enhances the sealing performance and ensures the stability and safety of the inflation process. Several groups of springs 13 are arranged between the three groups of first limiting rings 14 and the corresponding second limiting rings 15. Specifically, after the air tightness test is completed, the movable handle 5 is rotated. Due to the elastic effect of the spring 13, the second limiting ring 15 will gradually rebound, thereby gradually separating from the explosion-proof valve.

[0021] Reference Figure 1-Figure 6 , an extrusion piece 10 is arranged on the periphery of the movable handle 5 near the inflator 1, and an extrusion groove 12 is provided on the periphery of one side of the inflator 1 near the movable handle 5. The outer surface of one side of the extrusion piece 10 after rotation is aligned with the end surface of the extrusion groove 12. Specifically, by rotating the movable handle 5 to gradually straighten it downward, the extrusion piece 10 squeezes the corresponding sliding piece 9 and gradually pushes it forward. The hexagonal limit block 3, the fixing nut 4 and the explosion-proof valve limit head 6 are configured as an integrally formed structure. Specifically, during the test, the inflator 1 of the airtightness test device is connected to the explosion-proof valve, and the gas enters the battery pack from the explosion-proof valve.

[0022] Reference Figure 1-Figure 6, each side outer surface of the hexagonal limit block 3 is provided with an explosion-proof valve air inlet 2, and the center of the fixed nut 4 is provided with an explosion-proof valve air outlet 20, and the gas passage of each group of explosion-proof valve air inlet 2 is connected with the gas passage of the explosion-proof valve air outlet 20. Specifically, the center of the fixed nut 4 is provided with an explosion-proof valve air outlet 20. This design ensures that the gas passage of each group of explosion-proof valve air inlet 2 and the gas passage of the explosion-proof valve air outlet 20 are unobstructed. A group of rotating rods 17 are provided between the inner surfaces of one side of the inflatable device 1 close to the movable handle 5, and a group of rotating limit blocks 16 are provided at both ends of the rotating rod 17. Specifically, when the movable handle 5 is rotated, the corresponding rotating limit blocks 16 at both ends of the rotating rod 17 are driven to rotate inside the inflatable device 1. Both sets of rotation limit blocks 16 are rotationally connected to the inner surface of the inflatable device 1, the other end of the outer peripheral movable handle 5 of the rotating rod 17 is fixedly connected, and a connecting port 18 is provided at the intersection of the rotating rod 17 and the outer periphery of the movable handle 5. Specifically, when the movable handle 5 is rotated, the rotation limit blocks 16 at the corresponding ends of the rotating rod 17 are driven to rotate inside the inflatable device 1, and the connecting port 18 is used to ensure a stable connection between the rotating rod 17 and the movable handle 5.

[0023] The implementation principle of the battery pack explosion-proof valve inflation device embodiment of the present application is: When the battery pack needs to be tested for air tightness, the movable handle 5 is rotated to gradually straighten it downward, and the extrusion piece 10 squeezes the corresponding sliding piece 9 and gradually pushes it forward. The rubber layer 19 on the inner surface of the sliding piece 9 fits tightly with the outer surface of the explosion-proof valve limit head 6. The rubber material will not damage the explosion-proof valve, so that the explosion-proof valve is compressed to effectively prevent air leakage. The inner surface of the hexagonal limit groove 8 at the top of the inflation device 1 is directly inserted into the hexagonal limit block 3 to effectively enhance the sealing ability of the joint between the explosion-proof valve and the inflation device, effectively improve the air tightness, and greatly improve the efficiency of the battery pack air tightness test.

[0024] On the other hand, when the movable handle 5 is rotated, the rotating limit blocks 16 at both ends of the corresponding rotating rod 17 are driven to rotate inside the inflator 1, and the connecting port 18 is used to ensure a stable connection between the rotating rod 17 and the movable handle 5. When the movable handle 5 is bent downward at 90 degrees, one side end face of the extrusion piece 10 is against one side end face of the extrusion groove 12 and stops rotating. After the airtightness test is completed, by rotating the movable handle 5, due to the elastic action of the spring 13, the second limit ring 15 will gradually rebound, thereby gradually separating from the explosion-proof valve. The battery pack airtightness test device can realize the rapid and accurate docking of the battery pack explosion-proof valve and the inflator, and can effectively enhance the sealing ability of the docking point, effectively improve the airtightness, and the operation is convenient and labor-saving. In addition, the inflator has a small size and can be operated in a small space.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack explosion-proof valve inflation device, comprising an inflation device (1), characterized in that: A group of inflation holes (11) are provided on the side of the inflation device (1); a hexagonal limiting groove (8) is provided on the outer surface of the top of the inflation device (1); a hexagonal limiting block (3) is provided inside the hexagonal limiting groove (8); the inner surface of the hexagonal limiting groove (8) is limitedly engaged with the hexagonal limiting block (3); a fixing nut (4) is provided on the outer surface of the hexagonal limiting block (3) away from the inflation device (1); An explosion-proof valve limit head (6) is arranged on the outer surface of one side of the hexagonal limit block (3) close to the inflatable device (1), a movable handle (5) is arranged at the rear of the inflatable device (1), a sliding member (9) is arranged inside the inflatable device (1), a group of rubber layers (19) are evenly arranged on the inner surface of one side of the sliding member (9) close to the hexagonal limit block (3), and the outer surface of the explosion-proof valve limit head (6) is tightly fitted with the inner surface of the hexagonal limit block (3).

2. A battery pack explosion-proof valve inflation device as claimed in claim 1, characterized in that: The outer surface of the sliding member (9) is slidably connected to the inner surface of the inflatable device (1); three groups of second limiting rings (15) are arranged in parallel on the outer periphery of the sliding member (9); three groups of first limiting rings (14) are evenly arranged on the inner surface of the inflatable device (1); a sealing layer (22) is arranged on the inner surface of the inflatable device (1) away from the hexagonal limiting groove (8); and the inner surface of the sealing layer (22) is tightly fitted with the outer surface of the sliding member (9).

3. A battery pack explosion-proof valve inflation device as claimed in claim 2, characterized in that: A plurality of groups of springs (13) are arranged between the three groups of the first limiting rings (14) and the corresponding second limiting rings (15).

4. A battery pack explosion-proof valve inflation device as claimed in claim 1, characterized in that: An extrusion piece (10) is arranged on the periphery of the movable handle (5) close to the inflatable device (1), and an extrusion groove (12) is provided on the periphery of one side of the inflatable device (1) close to the movable handle (5), and an outer surface of one side of the extrusion piece (10) after rotation abuts against an end surface of the extrusion groove (12).

5. A battery pack explosion-proof valve inflation device as claimed in claim 1, characterized in that: The hexagonal limiting block (3), the fixing nut (4) and the explosion-proof valve limiting head (6) are configured as an integrally formed structure.

6. A battery pack explosion-proof valve inflation device as claimed in claim 5, characterized in that: An explosion-proof valve air inlet (2) is provided on the outer surface of each side of the hexagonal limit block (3), an explosion-proof valve air outlet (20) is provided at the center of the fixing nut (4), and the gas passages of each group of the explosion-proof valve air inlet (2) are connected to the gas passages of the explosion-proof valve air outlet (20).

7. A battery pack explosion-proof valve inflation device as claimed in claim 5, characterized in that: A group of rotating rods (17) are arranged between the inner surfaces of one side of the inflation device (1) close to the movable handle (5), and a group of rotating limit blocks (16) are arranged at both ends of the rotating rods (17).

8. A battery pack explosion-proof valve inflation device as claimed in claim 7, characterized in that: The two groups of rotation limit blocks (16) are both rotationally connected to the inner surface of the inflation device (1), the outer periphery of the rotation rod (17) is fixedly connected to the other end of the movable handle (5), and a connection port (18) is provided at the junction of the rotation rod (17) and the outer periphery of the movable handle (5).

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