Battery pack air tightness detection device

Abstract

The utility model belongs to the technical field of battery pack air tightness detection, and particularly relates to a battery pack air tightness detection device, which comprises a transparent detection box, an inner box fixedly mounted in the transparent detection box, detection mechanisms arranged on two sides of the transparent detection box, a pressure gauge fixedly mounted on one side of the inner box, and a controller fixedly mounted on the front side of the transparent detection box. The new energy automobile battery pack detection device is characterized by further comprising two first electric push rods, the two first electric push rods are fixedly installed on the left side and the right side of the transparent detection box respectively, and a connecting block is fixedly installed at the output end of one first electric push rod. The surface of the new energy automobile battery pack can be effectively prevented from being abraded and scratched, the sealing cover can be fixed more stably, the situation that the sealing cover shakes due to collision or vibration is avoided, and it is guaranteed that the sealing performance of the inner box is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack air tightness detection, and in particular relates to a battery pack air tightness detection device. Background Art

[0002] The battery pack of new energy vehicles is one of the core components of new energy vehicles. It provides power to the vehicle's electric motor and determines key indicators such as the vehicle's range, performance and service life.

[0003] For example, the Chinese patent with the announcement number CN218496355U discloses an airtightness detection device for a new energy vehicle battery pack, which specifically relates to the field of airtightness detection technology, including a transparent detection box, a cavity is opened inside the transparent detection box, and the cavity extends to the top of the transparent detection box. A bottom box is fixedly provided at the bottom end of the transparent detection box, a control panel is fixedly provided on the front side of the transparent detection box, a first detection mechanism and a second detection mechanism are provided on both sides of the transparent detection box, and a pickup mechanism is provided inside the bottom box. The utility model performs an airtightness detection on the battery pack of a new energy vehicle after it is fixed in position, so as to prevent the battery pack of the new energy vehicle from becoming unstable in position after being subjected to gas pressure, thereby causing the pressure gauge to read unstable. It also prevents the new energy vehicle battery pack with unqualified airtightness from entering the market, thereby protecting the lives and property of consumers. The airtightness detection of the inner box can also be performed to ensure the accuracy of the detection of the battery pack of the new energy vehicle.

[0004] The above patent has the following problems:

[0005] This patent has some shortcomings when used. For example, when the device removes the new energy vehicle battery pack, the two extrusion plates contact the surface of the new energy vehicle battery pack, which causes friction between the extrusion plates and the surface of the new energy vehicle battery pack, which can easily cause wear and scratches on the surface of the new energy vehicle battery pack. At the same time, the device uses four first magnets and four second magnets to fix the cover plate to the transparent inspection box. If the cover plate is slightly impacted or vibrated, it is easy to become unstable, which will affect the sealing of the inner box. In view of this, we propose a battery pack airtightness detection device. Utility Model Content

[0006] The purpose of the present utility model is to provide a battery pack air tightness detection device to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a battery pack air tightness detection device, comprising a transparent detection box, an inner box is fixedly installed in the transparent detection box, detection mechanisms are provided on both sides of the transparent detection box, a pressure gauge is fixedly installed on one side of the inner box, and a controller is fixedly installed on the front side of the transparent detection box, and also includes: two electric push rods 1, the two electric push rods 1 are fixedly installed on the left and right sides of the transparent detection box respectively, one of the electric push rods 1 is fixedly installed with a connecting block at the output end, and the other electric push rod 1 is fixedly installed with a fixed block at the output end of the other electric push rod 1, a sealing cover is rotatably installed on the connecting block, a limiting groove is provided on the sealing cover, and a T-shaped rod that is plugged into the limiting groove is rotatably installed on the fixed block; a movable plate, the movable plate is located in the inner box, and extrusion plates are provided in the inner box and on four sides of the movable plate respectively, a groove is provided on the side of the extrusion plate close to the movable plate, a plurality of rollers are rotatably installed in the groove, and a plurality of telescopic rods fixed to the inner wall of the inner box are fixedly installed on the other side of the extrusion plate, a spring is sleeved on the telescopic rod, and a sealing gasket fixed to the sealing cover is provided on the top of the inner box.

[0008] The U-shaped handle on the T-shaped rod can be turned by hand to drive the T-shaped rod to rotate, so that the T-shaped rod rotates 90 degrees, and then it can be rotated upward to open the sealing cover. The staff puts the new energy vehicle battery pack into the inner box and locates it on the top of the rubber pad. At this time, the elastic force generated by the compression of the spring squeezes and fixes the new energy vehicle battery pack, so that the several rollers on the extrusion plate will be in close contact with the new energy vehicle battery pack, and under the action of the telescopic rod, the telescopic rod can be extended and retracted, so that the extrusion plate is more stable during the displacement process. When taking out the new energy vehicle battery pack, the new energy vehicle battery pack moves upward. At this time, the roller in contact with the new energy vehicle battery pack will rotate, so that the surface of the new energy vehicle battery pack will not be worn or scratched during the upward displacement.

[0009] Then, rotate and close the sealing cover, and then turn the U-shaped handle on the T-shaped rod again to drive the T-shaped rod to rotate, so that the T-shaped rod rotates 90 degrees again, and then, the two electric push rods 1 can be started to move the output shafts of the two electric push rods 1 downward, and then, the output shafts of the two electric push rods 1 will respectively drive the connecting block and the fixed block to move downward, and the fixed block will drive the T-shaped rod to move downward, so that the T-shaped rod will be inserted into the limit groove again, thereby causing the sealing cover to move downward, and then, the sealing gasket at the bottom of the sealing cover will be inserted into the top of the inner box, and at the same time, the bottom of the sealing gasket will contact the top of the new energy vehicle battery pack, so that the new energy vehicle battery pack is fixed more stably, and the sealing gasket will not cause wear to the new energy vehicle battery pack, at this time, the sealing cover is in close contact with the top of the transparent inspection box, thereby sealing the inner box;

[0010] Through the controller, one of the detection mechanisms can detect the air tightness of the new energy vehicle battery pack, and the other detection mechanism can be used to detect the air tightness of the inner box to ensure the accuracy of the new energy vehicle battery pack detection.

[0011] In the above technical solution, further, a U-shaped handle is fixedly installed on the top of the T-shaped rod.

[0012] In this technical solution, it is ensured that the T-shaped rod can be rotated through the U-shaped handle, which is more convenient.

[0013] In the above technical solution, further comprising:

[0014] An electric push rod 2 is fixedly installed on the bottom of the transparent detection box. The output end of the electric push rod 2 passes through the bottom of the transparent detection box and the bottom of the inner box and is tightly welded to the movable plate. The output shaft of the electric push rod 2 is slidably connected to the transparent detection box and the inner box.

[0015] In this technical solution, when taking out the new energy vehicle battery pack, the staff starts the electric push rod 2, so that the output shaft of the electric push rod 2 drives the movable plate to move upward, and then the movable plate will drive the rubber pad to move upward, so that the new energy vehicle battery pack will also move upward. At this time, the roller in contact with the new energy vehicle battery pack will rotate, so that the surface of the new energy vehicle battery pack will not be worn during the upward displacement of the new energy vehicle battery pack.

[0016] In the above technical solution, further, a rubber pad is fixedly installed on the top of the movable plate.

[0017] In this technical solution, the material of the rubber pad is relatively soft, which can avoid wear on the bottom of the new energy vehicle battery pack.

[0018] In the above technical solution, further, the plurality of rollers in the groove are linearly and evenly distributed, and the distance between each two rollers is 0.2-0.5 cm.

[0019] In this technical solution, it is ensured that the new energy vehicle battery pack can drive several rollers to rotate during the upward displacement process, thereby avoiding wear and scratches on the surface of the new energy vehicle battery pack.

[0020] In the above technical solution, further, both ends of the spring are tightly welded to the other side of the drum and the inner wall of the inner box respectively.

[0021] In this technical solution, the structural stability of the spring is ensured.

[0022] In the above technical solution, further, the detection mechanism includes:

[0023] Two fixed shells, the two fixed shells are respectively fixedly installed on the left and right sides of the transparent detection box, and a booster pump and a vacuum pump are respectively fixedly installed in the two fixed shells. The air inlet ends of the booster pump and the vacuum pump are fixedly installed with connecting pipes, one end of the connecting pipe passes through one side of the fixed shell and one side of the transparent detection box and is fixed to the inner box, and the connecting pipe is connected to the inner cavity of the inner box, and a one-way valve is fixedly installed on the connecting pipe.

[0024] In this technical solution, the booster pump is started by the controller. The operation of the booster pump opens one of the one-way valves, and the pressure inside the inner box increases. After the specified pressurization time, the booster pump stops working, and one of the one-way valves closes. The pressure value on the pressure gauge at this time is recorded, and the pressure value on the pressure gauge is observed through the transparent detection box to see whether it drops. If the pressure value drops, it means that gas has entered the new energy vehicle battery pack, proving that there is a problem with the airtightness of the new energy vehicle battery pack. Otherwise, the airtightness of the new energy vehicle battery pack is qualified.

[0025] After taking the new energy vehicle battery pack out of this device, close the sealing cover and start the vacuum pump. The operation of the vacuum pump opens the other one-way valve. Observe the pressure value inside the inner box through the pressure gauge until the vacuum pump draws a vacuum inside the inner box and then turns off the vacuum pump. If the pressure value on the pressure gauge does not change, the airtightness of the inner box is qualified. This device can test the airtightness of the inner box to ensure the accuracy of the new energy vehicle battery pack detection.

[0026] The beneficial effects of the utility model are:

[0027] 1. The battery pack air tightness detection device, through the cooperation between the extrusion plate, groove, spring, roller and telescopic rod, can effectively prevent the surface of the new energy vehicle battery pack from being worn and scratched when the new energy vehicle battery pack moves upward.

[0028] 2. The battery pack air tightness detection device ensures that the sealing cover can be fixed more stably through the cooperation between the two electric push rods, the fixing block, the connecting block and the T-shaped rod, and will not shake due to collision or vibration, thereby ensuring that the sealing of the inner box will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure inside the transparent detection box of the present invention;

[0031] Figure 3 This is a schematic diagram of the regional structure of the extruded plate in the present utility model;

[0032] Figure 4 This is a schematic structural diagram of the extruded plate in the present utility model;

[0033] Figure 5 This is a schematic diagram of the regional structure of the fixed block in the utility model;

[0034] Figure 6 This is a schematic diagram of the regional structure of the connecting block in the present utility model;

[0035] Figure 7 This is a schematic diagram of the regional structure of the movable plate in the present utility model;

[0036] Figure 8 This is a schematic structural diagram of the sealing cover and sealing gasket in the present invention;

[0037] Figure 9 This is a schematic structural diagram of the sealing cover in the present invention;

[0038] Figure 10 For this utility model Figure 9 A in the middle is an enlarged structural diagram;

[0039] Figure 11 This is a structural diagram of the transparent detection box and the pressure gauge in the present utility model.

[0040] The marks in the figure are:

[0041] 1. Transparent inspection box; 2. Sealing cover; 3. Electric push rod 1; 4. Fixed block; 5. T-shaped rod; 6. Rubber pad; 7. Electric push rod 2; 8. Extrusion plate; 9. Roller; 10. Inner box; 11. Connecting block; 12. Telescopic rod; 13. Spring; 14. Groove; 15. Pressure gauge; 16. Booster pump; 17. Moving plate; 18. Sealing pad; 19. Limit groove; 20. Connecting pipe; 21. Controller; 22. One-way valve; 23. Fixed shell; 24. Vacuum pump. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0043] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0044] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0046] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0047] Example 1:

[0048] See also Figure 1 - Figure 11 As shown, this embodiment provides a battery pack air tightness detection device, including a transparent detection box 1, an inner box 10 is fixedly installed in the transparent detection box 1, detection mechanisms are provided on both sides of the transparent detection box 1, a pressure gauge 15 is fixedly installed on one side of the inner box 10, and a controller 21 is fixedly installed on the front side of the transparent detection box 1. It also includes:

[0049] Two electric push rods 3 are fixedly installed on the left and right sides of the transparent detection box 1 respectively. A connecting block 11 is fixedly installed on the output end of one electric push rod 3, and a fixing block 4 is fixedly installed on the output end of the other electric push rod 3. A sealing cover 2 is rotatably installed on the connecting block 11, and a limiting groove 19 is provided on the sealing cover 2. A T-shaped rod 5 that is plugged into the limiting groove 19 is rotatably installed on the fixing block 4;

[0050] The movable plate 17 is located in the inner box 10. The inner box 10 is provided with an extrusion plate 8 on each of the four sides of the movable plate 17. A groove 14 is provided on the side of the extrusion plate 8 close to the movable plate 17. A number of rollers 9 are rotatably installed in the groove 14. A number of telescopic rods 12 fixed to the inner wall of the inner box 10 are fixedly installed on the other side of the extrusion plate 8. A spring 13 is provided on the telescopic rod 12. A sealing gasket 18 fixed to the sealing cover 2 is provided on the top of the inner box 10.

[0051] Among them, when in use, the staff starts the two electric push rods 3, and the output shafts of the two electric push rods 3 will respectively drive the fixing block 4 and the connecting block 11 to move upward, and then the sealing cover 2 will move upward for a distance. At this time, the T-shaped rod 5 will be disengaged from the limit groove 19, and then the U-shaped handle on the T-shaped rod 5 can be turned by hand to drive the T-shaped rod 5 to rotate, so that the T-shaped rod 5 rotates 90°, and then it can be rotated upward to open the sealing cover 2. The staff puts the new energy vehicle battery pack into the inner box 10 and is located on the top of the rubber pad 6. At this time, the elastic force generated by the compression of the spring 13 squeezes and fixes the new energy vehicle battery pack, so that the several rollers 9 on the extrusion plate 8 will be in close contact with the new energy vehicle battery pack, and under the action of the telescopic rod 12, the telescopic rod 12 can be extended and retracted, so that the extrusion plate 8 is more stable during the displacement process. When the new energy vehicle battery pack is taken out, the new energy vehicle battery pack moves upward. At this time, the roller 9 in contact with the new energy vehicle battery pack will rotate, so that the surface of the new energy vehicle battery pack will not be worn or scratched during the upward displacement.

[0052] Afterwards, rotate and close the sealing cover 2, and then turn the U-shaped handle on the T-shaped rod 5 again to drive the T-shaped rod 5 to rotate, so that the T-shaped rod 5 rotates 90 degrees again. Then, the two electric push rods 3 can be started to move the output shafts of the two electric push rods 3 downward. Subsequently, the output shafts of the two electric push rods 3 will respectively drive the connecting block 11 and the fixing block 4 to move downward, and the fixing block 4 will drive the T-shaped rod 5 to move downward, so that the T-shaped rod 5 will be inserted into the limit groove 19 again, thereby causing the sealing cover 2 to move downward. Subsequently, the sealing gasket 18 at the bottom of the sealing cover 2 will be inserted into the top of the inner box 10. At the same time, the bottom of the sealing gasket 18 will contact the top of the new energy vehicle battery pack, making the new energy vehicle battery pack more stably fixed, and the sealing gasket 18 will not cause wear to the new energy vehicle battery pack. At this time, the sealing cover 2 is in close contact with the top of the transparent detection box 1, thereby sealing the inner box 10;

[0053] Through the controller 21, one of the detection mechanisms can detect the air tightness of the new energy vehicle battery pack, and the other detection mechanism can detect the air tightness of the inner box 10 to ensure the accuracy of the new energy vehicle battery pack detection.

[0054] Example 2:

[0055] This embodiment provides a battery pack air tightness detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: a U-shaped handle is fixedly installed on the top of the T-shaped rod 5.

[0056] Among them, it is ensured that the T-shaped rod 5 can be rotated by the U-shaped handle, which is more convenient.

[0057] Example 3:

[0058] This embodiment provides a battery pack airtightness detection device. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0059] An electric push rod 2 7 is fixedly installed at the bottom of the transparent detection box 1. The output end of the electric push rod 2 7 passes through the bottom of the transparent detection box 1 and the bottom of the inner box 10 and is tightly welded to the movable plate 17. The output shaft of the electric push rod 2 7 is slidably connected to the transparent detection box 1 and the inner box 10.

[0060] Among them, when taking out the new energy vehicle battery pack, the staff starts the electric push rod 2 7, so that the output shaft of the electric push rod 2 7 drives the movable plate 17 to move upward, and then the movable plate 17 will drive the rubber pad 6 to move upward, so that the new energy vehicle battery pack will also move upward. At this time, the roller 9 in contact with the new energy vehicle battery pack will rotate, so that the surface of the new energy vehicle battery pack will not be worn during the upward displacement of the new energy vehicle battery pack.

[0061] Example 4:

[0062] This embodiment provides a battery pack air tightness detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: a rubber pad 6 is fixedly installed on the top of the movable plate 17.

[0063] Among them, the material of the rubber pad 6 is relatively soft, which can avoid wear on the bottom of the new energy vehicle battery pack.

[0064] Example 5:

[0065] This embodiment provides a battery pack air tightness detection device. In addition to the technical solutions of the above embodiments, it also has the following technical features: the plurality of rollers 9 in the groove 14 are linearly and evenly spaced, and the distance between each two rollers 9 is 0.2-0.5 cm.

[0066] Among them, it is ensured that the new energy vehicle battery pack can drive the plurality of rollers 9 to rotate during the upward displacement process, thereby avoiding wear and scratches on the surface of the new energy vehicle battery pack.

[0067] Example 6:

[0068] This embodiment provides a battery pack air tightness detection device. In addition to the technical solutions of the above embodiments, it also has the following technical features: the two ends of the spring 13 are tightly welded to the other side of the roller 9 and the inner wall of the inner box 10 respectively.

[0069] Herein, the structural stability of the spring 13 is ensured.

[0070] Example 7:

[0071] This embodiment provides a battery pack airtightness detection device. In addition to the technical solutions of the above embodiments, it also has the following technical features. The detection mechanism includes:

[0072] Two fixed shells 23 are respectively fixedly installed on the left and right sides of the transparent detection box 1. The booster pump 16 and the vacuum pump 24 are respectively fixedly installed in the two fixed shells 23. The air inlet ends of the booster pump 16 and the vacuum pump 24 are fixedly installed with a connecting pipe 20. One end of the connecting pipe 20 passes through one side of the fixed shell 23 and one side of the transparent detection box 1 and is fixed to the inner box 10. The connecting pipe 20 is connected to the inner cavity of the inner box 10, and a one-way valve 22 is fixedly installed on the connecting pipe 20.

[0073] The booster pump 16 is started by the controller 21. The operation of the booster pump 16 opens one of the one-way valves 22. At this time, the pressure inside the inner box 10 increases. After the specified pressurization time, the booster pump 16 stops working. At this time, one of the one-way valves 22 is closed. The pressure value on the pressure gauge 15 is recorded at this time. The pressure value on the pressure gauge 15 is observed through the transparent detection box 1 to see whether it decreases. If the pressure value decreases, it means that gas has entered the new energy vehicle battery pack, indicating that there is a problem with the airtightness of the new energy vehicle battery pack. Otherwise, the airtightness of the new energy vehicle battery pack is qualified.

[0074] After taking the new energy vehicle battery pack out of this device, close the sealing cover 2 and start the vacuum pump 24. The operation of the vacuum pump 24 opens the other one-way valve 22. Observe the pressure value inside the inner box 10 through the pressure gauge 15 until the vacuum pump 24 evacuates the interior of the inner box 10 to a vacuum. Then, turn off the vacuum pump 24. If the pressure value on the pressure gauge 15 does not change, the airtightness of the inner box 10 is qualified. This device can test the airtightness of the inner box 10 to ensure the accuracy of the new energy vehicle battery pack detection.

[0075] It is worth noting that the surface of the roller 9 is made of rubber, which makes the roller 9 relatively soft and can avoid causing wear and scratches on the surface of the new energy vehicle battery pack.

[0076] Working principle: When in use, the staff starts the two electric push rods 3, and the output shafts of the two electric push rods 3 will respectively drive the fixing block 4 and the connecting block 11 to move upward, and then the sealing cover 2 will move upward for a distance. At this time, the T-shaped rod 5 will be disengaged from the limit groove 19, and then the U-shaped handle on the T-shaped rod 5 can be turned by hand to drive the T-shaped rod 5 to rotate, so that the T-shaped rod 5 rotates 90 degrees, and then it can be rotated upward to open the sealing cover 2. The staff puts the new energy vehicle battery pack into the inner box 10 and it is located on the top of the rubber pad 6. At this time, the elastic force generated by the compression of the spring 13 squeezes the new energy vehicle battery pack and fixes it. The rollers 9 on the extrusion plate 8 will be in close contact with the new energy vehicle battery pack, and under the action of the telescopic rod 12, the telescopic rod 12 can be extended and retracted, making the extrusion plate 8 more stable during the displacement process. When taking out the new energy vehicle battery pack, the staff starts the electric push rod 2 7, so that the output shaft of the electric push rod 2 7 drives the movable plate 17 to move upward. Subsequently, the movable plate 17 will drive the rubber pad 6 to move upward, so that the new energy vehicle battery pack will also move upward. At this time, the rollers 9 in contact with the new energy vehicle battery pack will rotate, so that the surface of the new energy vehicle battery pack will not be worn during the upward displacement process.

[0077] Afterwards, rotate and close the sealing cover 2, and then turn the U-shaped handle on the T-shaped rod 5 again to drive the T-shaped rod 5 to rotate, so that the T-shaped rod 5 rotates 90 degrees again. Then, the two electric push rods 3 can be started to move the output shafts of the two electric push rods 3 downward. Subsequently, the output shafts of the two electric push rods 3 will respectively drive the connecting block 11 and the fixing block 4 to move downward, and the fixing block 4 will drive the T-shaped rod 5 to move downward, so that the T-shaped rod 5 will be inserted into the limit groove 19 again, thereby causing the sealing cover 2 to move downward. Subsequently, the sealing gasket 18 at the bottom of the sealing cover 2 will be inserted into the top of the inner box 10. At the same time, the bottom of the sealing gasket 18 will contact the top of the new energy vehicle battery pack, making the new energy vehicle battery pack more stably fixed, and the sealing gasket 18 will not cause wear to the new energy vehicle battery pack. At this time, the sealing cover 2 is in close contact with the top of the transparent detection box 1, thereby sealing the inner box 10;

[0078] The booster pump 16 is started by the controller 21. The operation of the booster pump 16 opens one of the one-way valves 22. At this time, the pressure inside the inner box 10 increases. After the specified pressurization time, the booster pump 16 stops working. At this time, one of the one-way valves 22 is closed. The pressure value on the pressure gauge 15 is recorded at this time. The pressure value on the pressure gauge 15 is observed through the transparent detection box 1 to see if it decreases. If the pressure value decreases, it means that gas has entered the new energy vehicle battery pack, indicating that there is a problem with the airtightness of the new energy vehicle battery pack. Otherwise, the airtightness of the new energy vehicle battery pack is qualified.

[0079] After taking the new energy vehicle battery pack out of this device, close the sealing cover 2 and start the vacuum pump 24. The operation of the vacuum pump 24 opens the other one-way valve 22. Observe the pressure value inside the inner box 10 through the pressure gauge 15 until the vacuum pump 24 evacuates the interior of the inner box 10 to a vacuum. Then, turn off the vacuum pump 24. If the pressure value on the pressure gauge 15 does not change, the airtightness of the inner box 10 is qualified. This device can test the airtightness of the inner box 10 to ensure the accuracy of the new energy vehicle battery pack detection.

[0080] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A battery pack air tightness detection device, comprising a transparent detection box (1), wherein an inner box (10) is fixedly installed in the transparent detection box (1), detection mechanisms are provided on both sides of the transparent detection box (1), a pressure gauge (15) is fixedly installed on one side of the inner box (10), and a controller (21) is fixedly installed on the front side of the transparent detection box (1), characterized in that: Also includes: Two electric push rods (3), the two electric push rods (3) are fixedly mounted on the left and right sides of the transparent detection box (1), respectively, the output end of one of the electric push rods (3) is fixedly mounted with a connecting block (11), the output end of the other electric push rod (3) is fixedly mounted with a fixing block (4), a sealing cover (2) is rotatably mounted on the connecting block (11), a limiting groove (19) is provided on the sealing cover (2), and a T-shaped rod (5) that is plugged into the limiting groove (19) is rotatably mounted on the fixing block (4); A movable plate (17), the movable plate (17) is located in the inner box (10), and extrusion plates (8) are provided in the inner box (10) and on four sides of the movable plate (17), a groove (14) is provided on one side of the extrusion plate (8) close to the movable plate (17), a plurality of rollers (9) are rotatably installed in the groove (14), a plurality of telescopic rods (12) fixed to the inner wall of the inner box (10) are fixedly installed on the other side of the extrusion plate (8), a spring (13) is provided on the telescopic rod (12), and a sealing gasket (18) fixed to the sealing cover (2) is provided on the top of the inner box (10).

2. The battery pack air tightness detection device according to claim 1, characterized in that: A U-shaped handle is fixedly mounted on the top of the T-shaped rod (5).

3. The battery pack air tightness detection device according to claim 1, characterized in that: Also includes: An electric push rod 2 (7) is fixedly installed at the bottom of the transparent detection box (1), and the output end of the electric push rod 2 (7) passes through the bottom of the transparent detection box (1) and the bottom of the inner box (10) and is tightly welded to the movable plate (17). The output shaft of the electric push rod 2 (7) is slidably connected to the transparent detection box (1) and the inner box (10).

4. The battery pack air tightness detection device according to claim 3, characterized in that: A rubber pad (6) is fixedly mounted on the top of the movable plate (17).

5. The battery pack air tightness detection device according to claim 1, characterized in that: The rollers (9) in the groove (14) are linearly and evenly spaced, and the distance between each two rollers (9) is 0.2-0.5 cm.

6. The battery pack air tightness detection device according to claim 1, characterized in that: The two ends of the spring (13) are tightly welded to the other side of the roller (9) and the inner wall of the inner box (10).

7. The battery pack air tightness detection device according to claim 1, characterized in that: The detection mechanism includes: Two fixed shells (23), the two fixed shells (23) are fixedly mounted on the left and right sides of the transparent detection box (1), respectively, and a booster pump (16) and a vacuum pump (24) are fixedly mounted in the two fixed shells (23), and a connecting pipe (20) is fixedly mounted on the air inlet ends of the booster pump (16) and the vacuum pump (24), one end of the connecting pipe (20) passes through one side of the fixed shell (23) and one side of the transparent detection box (1) and is fixed to the inner box (10), and the connecting pipe (20) is connected to the inner cavity of the inner box (10), and a one-way valve (22) is fixedly mounted on the connecting pipe (20).

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