Battery airtightness detection mechanism and equipment

Abstract

The utility model relates to the technical field of lithium battery manufacturing equipment, and particularly discloses a battery airtightness detection mechanism and equipment, the battery airtightness detection mechanism comprises a detection table and a helium detection module, one side of the detection table is provided with a detection part used for placing a battery to be detected, and the helium detection module and the detection part are oppositely arranged; the helium detection module comprises a helium pressing nozzle and a helium detection nozzle, the helium pressing nozzle and the helium detection nozzle are arranged at an interval, and the helium pressing nozzle is used for movably sealing and closing a sealing nail area of the battery to be detected and charging and discharging gas into the sealing nail area of the battery to be detected; and the helium detection nozzle is used for movably sealing and closing the sealing nail area of the battery to be detected. The beneficial effects of the utility model are that through the arrangement of the helium detection nozzle and the helium pressing nozzle, the sealing nail area of the battery to be detected can be directly sealed, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery manufacturing equipment, and particularly relates to a multi-battery airtightness detection mechanism and equipment. Background Art

[0002] Common lithium batteries come in various types, including blade batteries, square shell batteries, and cylindrical batteries, etc. After the battery sealing nails are welded, in order to ensure their stable performance and safety and reliability, the airtightness of the welds must be strictly detected.

[0003] When the existing detection mechanism is detecting, it first performs the process of injecting helium and inserting glue nails in the sealing nail area of the battery to be detected, and then places the battery into the sealed cavity, evacuates the cavity, and when the vacuum value reaches the rated value, opens the helium detection valve, and the helium detector is connected to the vacuum cavity to determine whether the battery leaks by detecting the helium concentration in the cavity. During the detection process, when there is a leak in the sealing nail area of the battery, it is easy to occur that the helium gas inside the battery to be detected has leaked out before the battery to be detected moves to the detection cavity, affecting the detection accuracy. The detection precision and accuracy are low, and its detection steps are complex and the detection efficiency is low. Content of the Utility Model

[0004] In order to solve the deficiencies of the existing technology described above, the utility model provides a battery airtightness detection mechanism and equipment.

[0005] In the first aspect, a battery airtightness detection mechanism is provided for detecting the airtightness of a battery to be detected. There is a sealing nail area on one side of the battery to be detected, which includes a detection table and a helium detection module. A detection part for placing the battery to be detected is arranged on one side of the detection table, and the helium detection module is arranged opposite to the detection part;

[0006] The helium detection module includes a helium pressing nozzle and a helium detection nozzle. The helium pressing nozzle and the helium detection nozzle are arranged at intervals. The helium pressing nozzle is used to actively seal the sealing nail area of the battery to be detected and charge and discharge gas to the sealing nail area of the battery to be detected, and the helium detection nozzle is used to actively seal the sealing nail area of the battery to be detected.

[0007] In some embodiments of the present application, the helium detection module further includes a helium detector, and the helium detector is connected to the helium detection nozzle through a pipeline.

[0008] In some embodiments of the present application, the cross-sectional area of the helium pressing nozzle is larger than the cross-sectional area of the sealing nail area.

[0009] In some embodiments of the present application, the cross-sectional area of the helium detection nozzle is larger than the cross-sectional area of the sealing nail area.

[0010] In some embodiments of the present application, a first moving module is further included. The mobile end of the first moving module is connected to the detection table to drive the detection table to move between the helium injection nozzle and the helium leak detection nozzle.

[0011] In some embodiments of the present application, the helium leak detection module further includes a first driving member. The first driving member is spaced apart from the detection portion, and the first driving member is drivingly connected to the helium leak detection nozzle to drive the helium leak detection nozzle to approach or move away from the detection portion.

[0012] In some embodiments of the present application, the helium leak detection module further includes a second driving member. The second driving member is spaced apart from the detection portion, and the second driving member is drivingly connected to the helium injection nozzle to drive the helium injection nozzle to approach or move away from the detection portion.

[0013] In some embodiments of the present application, an air knife is further included. The air knife is spaced apart from the detection portion, and the air knife is used to blow the sealing nail area of the battery under test.

[0014] In some embodiments of the present application, the helium injection nozzle is provided with a first sealing member, and the helium leak detection nozzle is provided with a second sealing member.

[0015] In a second aspect, a battery airtightness detection device is provided, including the battery airtightness detection mechanism, a feeding device, and a discharging device in any of the above technical solutions. The feeding device and the discharging device are respectively arranged on one side of the battery airtightness detection mechanism;

[0016] The feeding device includes a second moving module. A first handling member is drivingly connected to the mobile end of the second moving module to move the battery under test to the detection portion through the first handling member;

[0017] The discharging device includes a third moving module. A second handling member is drivingly connected to the mobile end of the third moving module to discharge the battery under test on the detection portion.

[0018] In summary, the present utility model has the following advantages:

[0019] The utility model is provided with a helium pressing nozzle and a helium detecting nozzle. The helium pressing nozzle and the helium detecting nozzle are installed above the detecting part. The helium pressing nozzle and the helium detecting nozzle can be directly attached to the sealing nail area of the battery to be detected respectively to form a sealed space. At the same time, by inflating and deflating the helium pressing nozzle, a detecting gas can be filled into the sealing nail area of the battery to be detected, and the detecting gas on the surface of the sealing nail area of the battery to be detected can be discharged and removed in time. In addition, by additionally providing a helium detecting nozzle, the sealing nail area of the battery to be detected after inflation and deflation can be attached and sealed again, and then the sealing nail area of the battery to be detected after inflation and deflation can be subjected to gas detection by an external detecting device, so as to detect whether there is a weld seam in the sealing nail area of the battery to be detected and detect its airtightness. In this way, the helium pressing nozzle performs inflation and deflation operations, and the helium detecting nozzle performs detection operations, which can avoid the helium detecting nozzle from introducing gas and avoid the helium detecting nozzle from being polluted by gas, thereby greatly improving the detection accuracy during detection. Moreover, the structure is simple and the operation is convenient. The sealing nail area of the battery to be detected can be detected in time, and the detection accuracy and efficiency can be improved. Description of the Drawings

[0020] Figure 1 It is a schematic structural view of the sealing nail of the lithium battery in the embodiment of the present application.

[0021] Figure 2 It is a front view of the battery airtightness detecting mechanism in the embodiment of the present application.

[0022] Figure 3 It is a schematic structural view of the battery airtightness detecting mechanism in the embodiment of the present application.

[0023] Figure 4 It is a schematic structural view of the helium detecting nozzle and the helium pressing nozzle in the embodiment of the present application.

[0024] Figure 5 It is a top view of the battery airtightness detecting device in the embodiment of the present application.

[0025] Markings in the figure:

[0026] 100, feeding device; 110, second moving module; 120, first handling member;

[0027] 200, discharging device; 210, third moving module; 220, second handling member;

[0028] 310, detecting table; 311, detecting part;

[0029] 320, helium detecting module; 321, helium pressing nozzle; 322, helium detecting nozzle; 323, first driving member; 324, second driving member; 325, air knife;

[0030] 330, first moving module;

[0031] 400, NG pallet;

[0032] 10, cover plate; 20, sealed aluminum nail; 30, sealed rubber nail; 40, cavity area. Specific implementation mode

[0033] To make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some but not all of the embodiments of the present utility model.

[0034] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0035] Embodiment 1

[0036] Please refer to the attached Figures 1-4 , this embodiment provides a battery airtightness detection mechanism 300 for detecting the airtightness of the battery. Specifically, it detects the airtightness of the weld seam after the battery sealing nails are welded, and judges whether the airtightness of the battery is good by judging the airtightness of the weld seam. Among them, the battery to be detected can be common batteries such as blade batteries, square shell batteries, and cylindrical batteries. The battery injection hole includes an external injection hole provided on the surface of the cover plate 10 and an internal injection hole provided inside the battery opposite to the external injection hole. When sealing the battery to be tested, first use the sealed rubber nail 30 to seal the internal injection hole, and then use the sealed aluminum nail 20 to seal the external injection hole of the battery. The injection hole on the surface of the cover plate 10 is sealed by the sealed aluminum nail 20, and a cavity area is formed between the sealed aluminum nail 20 and the sealed rubber nail 30. The sealed nail area in this embodiment refers to the weld seam area formed between the battery cover plate 10 and the sealed aluminum nail 20, and helium detection is carried out by sealing this area.

[0037] The battery airtightness detection mechanism includes a detection table 310 for placing the battery to be tested. The detection table 310 is in a block shape, and a detection part 311 is arranged on one side of the detection table 310. Exemplarily, the detection part 311 is arranged at the end of the detection table 310. The detection part 311 can be a groove at the end of the detection table 310, and the groove is adapted to the battery to be tested; it can also be to fix the battery to be tested by setting a limiting block at the end of the detection table 310, etc. The specific design method is not specifically limited in this embodiment. Among them, the helium detection module 320 is arranged opposite to the detection part 311, and the helium detection module 320 is used to detect the airtightness of the battery. For the convenience of description, a frame is introduced. The detection table 310 is arranged at the bottom of the frame, and the helium detection module 320 is arranged at the top of the frame.

[0038] The helium detection module 320 includes a helium pressing nozzle 321 and a helium detection nozzle 322. The helium pressing nozzle 321 and the helium detection nozzle 322 are arranged at intervals. The helium pressing nozzle 321 is used to movably seal the sealing nail area of the battery to be tested and charge and discharge gas to the sealing nail area of the battery to be tested. The helium detection nozzle 322 is used to movably seal the sealing nail area of the battery to be tested.

[0039] Among them, the helium pressing nozzle 321 can be connected to the equipment for charging and discharging gas outside through a pipeline, such as a vacuum pump, a helium gas cylinder, etc., to realize the function of charging and discharging gas. Exemplarily, it can also include a solenoid valve control component. The helium pressing nozzle 321 is connected to the helium gas cylinder, the vacuum pump and the nitrogen gas cylinder through pipelines respectively. The solenoid valve control component is arranged between the pipelines and is used to control the opening and closing of the helium gas cylinder pipeline, the vacuum pump pipeline and the nitrogen gas cylinder pipeline. By controlling the opening and closing of the helium gas cylinder pipeline, the vacuum pump pipeline and the nitrogen gas cylinder pipeline, the type of gas recharged and discharged in the sealing nail area by the helium pressing nozzle 321 can be controlled. During use, the helium pressing nozzle 321 is pressed to the sealing nail area to form a separate sealing space between the helium pressing nozzle 321 and the sealing nail area, so as to perform the operation of charging and discharging gas on the sealing nail area. The helium detection nozzle 322 is used to detect helium gas in the sealing nail area. During use, the helium detection nozzle 322 is pressed to the sealing nail area to form a separate sealing space between the helium detection nozzle 322 and the sealing nail area for helium gas detection. Among them, the helium pressing nozzle 321 performs all the gas charging and discharging operations, and the helium detection nozzle 322 does not perform the air extraction operation. This setting can keep the helium detection nozzle 322 clean and avoid gas residue during the gas charging and discharging process, which affects the detection result.

[0040] In this embodiment, a helium charging nozzle 321 and a helium leak detection nozzle 322 are provided. The helium charging nozzle 321 and the helium leak detection nozzle 322 are installed above the detection part 311. The helium charging nozzle 321 and the helium leak detection nozzle 322 can be directly attached to the sealing nail area of the battery under test respectively to form a sealed space. At the same time, by inflating and deflating the helium charging nozzle 321, a detection gas can be filled into the sealing nail area of the battery under test, and the detection gas on the surface of the sealing nail area of the battery under test can be discharged and removed in time. Additionally, by providing the helium leak detection nozzle 322, the sealing nail area of the battery under test after inflation and deflation can be re-sealed by fitting. Then, an external detection device is used to detect the gas in the sealing nail area of the battery under test after inflation and deflation, so as to detect whether there is a weld in the sealing nail area of the battery under test and detect its airtightness. In this way, the helium charging nozzle 321 performs the inflation and deflation operations, and the helium leak detection nozzle 322 performs the detection operation, which can avoid the introduction of gas into the helium leak detection nozzle 322 and prevent the helium leak detection nozzle 322 from being contaminated by the gas. Thus, the detection accuracy during detection can be greatly improved, and the structure is simple and the operation is convenient. The sealing nail area of the battery under test can be detected in time, and the detection accuracy and efficiency can be improved.

[0041] Preferably, the cross-sectional area of the helium charging nozzle 321 is larger than the cross-sectional area of the sealing nail area, which can enable the helium charging nozzle 321 to better seal the sealing nail area, improve the accuracy and sealing rate of the sealing process between the helium charging nozzle 321 and the sealing nail area, and further improve the detection speed.

[0042] Preferably, the cross-sectional area of the helium leak detection nozzle 322 is larger than the cross-sectional area of the sealing nail area. This can enable the helium leak detection nozzle 322 to better seal the sealing nail area, improve the accuracy and sealing rate of the sealing process between the helium leak detection nozzle 322 and the sealing nail area, and further improve the detection speed.

[0043] In some embodiments, the helium leak detection module 320 further includes a helium leak detector, and the helium leak detector is connected to the helium leak detection nozzle 322 through a pipeline. Specifically, the helium leak detector is an instrument for detecting the helium concentration. It is based on the physical properties of helium under specific conditions and realizes the detection of helium by measuring the helium concentration. During use, the helium leak detector is connected to the helium leak detection nozzle 322, and the helium leak detection nozzle 322 is arranged opposite to the detection part 311.

[0044] During the detection process, first place the battery to be tested into the detection unit 311 and fix it. Then, control the helium pressing nozzle 321 to be hermetically attached to the sealing nail area of the battery to be tested. The solenoid valve control component opens the nitrogen cylinder pipeline, and controls the helium pressing nozzle 321 to fill nitrogen into the sealing nail area and the weld. After the nitrogen filling is completed, the airtightness of the sealing nail area can be preliminarily judged by observing the change in pressure in the sealing nail area. It can be understood that other gases in the sealing nail area can also be removed by filling nitrogen, so as to discharge other gases in the sealing nail area and improve the accuracy of the subsequent helium leak detection process. After the preliminary judgment, the qualified batteries to be tested enter the next detection process, and the unqualified ones are removed from the detection unit 311 manually or by means of a robotic arm movement. Subsequently, the solenoid valve control component controls the nitrogen cylinder pipeline to close, opens the vacuum pump pipeline, evacuates the sealing nail area, closes the vacuum pump pipeline after the evacuation is completed, then opens the helium cylinder pipeline, fills helium into the sealing nail area, and then the helium leak detection nozzle 322 moves to the detection unit 311 and is hermetically attached to the sealing nail area of the battery to be tested. The helium leak detection of the sealing nail area is carried out by judging the helium atom leakage rate value through a helium leak detector to determine its airtightness.

[0045] Embodiment 2

[0046] The difference between Embodiment 2 and Embodiment 1 is that in this embodiment, the battery airtightness detection mechanism is further optimized. Refer to Figures 2-4 , and it further includes a first moving module 330. The moving end of the first moving module 330 is connected to the detection table 310 to drive the detection table 310 to move between the helium pressing nozzle 321 and the helium leak detection nozzle 322. Specifically, the first moving module 330 can be a lead screw guide rail, a rack and pinion, a cylinder, a moving module, etc. Exemplarily, the first moving module 330 is a servo module, and the moving end is a moving block, which controls the lead screw to rotate through a motor, thereby driving the moving block on the lead screw to move. The detection table 310 is arranged on the moving block so that it can move towards the direction of the helium pressing nozzle 321 or the helium leak detection nozzle 322. Setting the first moving module 330 can improve the automation degree of the equipment, reduce manual intervention, and improve the detection efficiency. At the same time, it can also enable the equipment to detect batteries of different specifications, improving the universality of the equipment.

[0047] In some embodiments, another moving module may also be included. The moving ends of the another moving module are respectively connected to the helium pressing nozzle 321 and the helium leak detection nozzle 322 to drive the helium pressing nozzle 321 and the helium leak detection nozzle 322 to approach or move away from the detection portion 311. Among them, the another moving module may be a cylinder, a rack and pinion, a lead screw guide rail, etc., and no specific limitation is made in this embodiment. Exemplarily, the another moving module in this embodiment is a lead screw guide rail, the moving end is a moving plate, the helium pressing nozzle 321 and the helium leak detection nozzle 322 are respectively arranged on the same side of the moving plate, the moving plate is arranged on the lead screw, and the guide rails are arranged on both sides of the lead screw for guiding. By rotating the lead screw, the moving plate is driven to move along the direction of the guide rail, and further the helium pressing nozzle 321 and the helium leak detection nozzle 322 are driven to move.

[0048] In some embodiments, the helium leak detection module 320 further includes a first driving member 323. The first driving member 323 is arranged at an interval from the detection portion 311, and the first driving member 323 is drivingly connected to the helium leak detection nozzle 322 to drive the helium leak detection nozzle 322 to approach or move away from the detection portion 311;

[0049] The helium leak detection module 320 further includes a second driving member 324. The second driving member 324 is arranged at an interval from the detection portion 311, and the second driving member 324 is drivingly connected to the helium pressing nozzle 321 to drive the helium pressing nozzle 321 to approach or move away from the detection portion 311.

[0050] Specifically, the helium leak detection nozzle 322 is drivingly connected to the first driving member 323, and the first driving member 323 drives the helium leak detection nozzle 322 to move. The second driving member 324 is drivingly connected to the helium pressing nozzle 321, and the second driving member 324 drives the helium pressing nozzle 321 to move. This setting can enable the helium pressing nozzle 321 assembly and the detection assembly to move independently, which is convenient for subsequent detection of the battery to be tested, and can make the moving process more precise. The setting method may be that the helium leak detection nozzle 322 is connected to the first driving member 323 and the helium pressing nozzle 321 is fixed; or the helium leak detection nozzle 322 is fixed and the helium pressing nozzle 321 is connected to the second driving member 324; or the helium leak detection nozzle 322 is connected to the first driving member 323 and the helium pressing nozzle 321 is connected to the second driving member 324, and no specific limitation is made in this embodiment. Exemplarily, the first driving member 323 and the second driving member 324 may be a cylinder, a lead screw guide rail, a moving module, a rack and pinion, etc., and no specific limitation is made in this embodiment.

[0051] Embodiment 3

[0052] The difference between Embodiment 3 and Embodiment 1 is that in this embodiment, the battery airtightness detection mechanism is further optimized. Refer to Figures 2-4Furthermore, it also includes an air knife 325, which is spaced apart from the detection unit 311 and used to purge the sealing nail area of ​​the battery to be tested. The air knife 325 can purge the helium, nitrogen and other gases on the surface of the battery to prevent the gas on the surface of the battery from affecting the detection result and improve the accuracy of the detection.

[0053] In some embodiments, the helium pressure nozzle 321 may further include a pressure gauge, which is connected to the helium pressure nozzle 321 through a pipeline. By providing the pressure gauge, the air pressure at the sealing nail area of ​​the battery to be tested can be checked in real time during the detection process, thereby improving the detection efficiency.

[0054] In some embodiments, the helium pressure nozzle 321 is provided with a first seal, and the helium detection nozzle 322 is provided with a second seal. Specifically, the first seal and the second seal can be a rubber head, a sealing ring, etc., which are arranged on the helium pressure nozzle 321 and the helium detection nozzle 322 to improve the airtightness of the helium pressure nozzle 321 and the helium detection nozzle 322, and improve the sealing performance of the sealing nail area with the battery to be tested.

[0055] Example 4

[0056] This embodiment provides a battery air tightness detection device, please refer to Figure 5 , including a battery air tightness detection mechanism, which may also include a code scanning component, a mobile component, etc., for automated detection of the battery to be tested, wherein the mobile component may be provided in the form of a mobile module, a screw guide rail, a gear rack, etc., which is not specifically limited in this embodiment. The battery air tightness detection equipment of this embodiment can directly seal the sealing nail area of ​​the battery to be tested, so that it can form a closed space with the helium detection nozzle 322 and the helium pressure nozzle respectively. The detection efficiency is improved, and the detection accuracy is improved due to the small sealing space.

[0057] It includes a feeding device 100, a discharging device 200 and a battery air tightness detection mechanism, wherein the feeding device 100 and the discharging device 200 are respectively arranged on one side of the battery air tightness detection mechanism; the feeding device 100 is used to load the battery to be tested, and the feeding device 100 includes a second moving module 110, and a first transporting member 120 is transmission-connected to the moving end of the second moving module 110, so that the first transporting member 120 moves the battery to be tested to the detection part 311. Exemplarily, the second moving module 110 includes a guide rail, which is arranged along the direction of the battery air tightness detection mechanism, and a moving block is arranged on the guide rail. The first transporting member 120 is arranged on the moving block. The first transporting member 120 can be a manipulator, a material picking clamp, etc. The manipulator clamps the battery to be tested, moves along the guide rail direction through the moving block, and places the battery to be tested on the detection part 311 to complete the loading.

[0058] The discharging device 200 includes a third moving module 210. A second handling member 220 is drivingly connected to the moving end of the third moving module 210 to discharge the battery under test on the second handling member 220. Exemplarily, the third moving module 210 includes a guide rail and a slider. The second handling member 220 is a manipulator. The manipulator is arranged on the slider. The manipulator moves the battery after detection from the detection part 311 to the blanking position, improving the efficiency of battery detection.

[0059] In some embodiments, it may further include an NG tray 400 for placing defective products. The second moving module 110 can drive the first handling member 120 to move to the NG tray 400; and / or the third moving module 210 can drive the second handling member 220 to move to the NG tray 400. The NG tray 400 is arranged on one side of the battery airtightness detection mechanism. Both the first handling member 120 and the second handling member 220 can move the battery under test to the NG tray 400. When the battery under test being loaded by the first handling member 120 is a defective product, the defective product is placed on the NG tray 400; when the battery detected by the battery airtightness detection mechanism is a defective product, the second handling member 220 can place the defective product on the NG tray 400.

[0060] Exemplarily, a moving module is connected to the NG tray, which can drive the NG tray 400 to move back and forth, facilitating the picking of defective products. The battery airtightness detection device can also be provided with a plurality of battery transplanting jigs. When the feeding device 100 or the discharging device 200 loads or unloads materials, the battery under test is placed on the battery transplanting jig, and the subsequent work is completed through the battery transplanting jig. This design can improve the work efficiency and detect multiple batteries at one time. A moving module can also be connected to the battery transplanting jig to drive the battery transplanting jig to move in the direction of the first handling member 120, the second handling member 220 or the detection part 311.

[0061] In some embodiments, a scanning module for scanning the battery under test can be further arranged on one side of the feeding device 100. The scanning module is arranged on one side of the feeding device 100 to scan the battery under test. When the scanning fails, the first handling member 120 can place the battery under test with scanning failure on the NG tray 400.

[0062] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0063] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0064] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0065] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0066] Although the description of the present utility model is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications, and variations based on the above content. Therefore, all such substitutions, improvements, and variations are included within the spirit and scope of the appended claims.

Claims

1. A battery airtightness detection mechanism for detecting the airtightness of a battery to be tested, wherein there is a sealing nail area on one side of the battery to be tested, and it is characterized in that, It includes a detection table and a helium leak detection module. On one side of the detection table, there is a detection part for placing the battery to be tested, and the helium leak detection module is arranged opposite to the detection part; The helium leak detection module includes a helium pressing nozzle and a helium leak detection nozzle. The helium pressing nozzle and the helium leak detection nozzle are arranged at intervals. The helium pressing nozzle is used to movably seal and enclose the sealing nail area of the battery to be tested and charge and discharge gas to the sealing nail area of the battery to be tested. The helium leak detection nozzle is used to movably seal and enclose the sealing nail area of the battery to be tested.

2. The battery airtightness detection mechanism according to claim 1, wherein, The helium leak detection module further includes a helium leak detector, and the helium leak detector is connected to the helium leak detection nozzle through a pipeline.

3. The battery airtightness detection mechanism according to claim 1, characterized in that, The cross-sectional area of the helium pressing nozzle is larger than the cross-sectional area of the sealing nail area.

4. The battery airtightness detection mechanism according to claim 1, characterized in that, The cross-sectional area of the helium leak detection nozzle is larger than the cross-sectional area of the sealing nail area.

5. The battery airtightness detection mechanism according to claim 1, wherein It further includes a first moving module. The moving end of the first moving module is connected to the detection table to drive the detection table to move between the helium pressing nozzle and the helium leak detection nozzle.

6. The battery airtightness detection mechanism according to claim 1, characterized in that, The helium leak detection module further includes a first driving member. The first driving member is arranged at intervals with the detection part, and the first driving member is drivingly connected to the helium leak detection nozzle to drive the helium leak detection nozzle to approach or move away from the detection part.

7. The battery airtightness detection mechanism according to claim 1, characterized in that, The helium leak detection module further includes a second driving member. The second driving member is arranged at intervals with the detection part, and the second driving member is drivingly connected to the helium pressing nozzle to drive the helium pressing nozzle to approach or move away from the detection part.

8. The battery airtightness detection mechanism according to claim 1, wherein, It further includes an air knife. The air knife is arranged at intervals with the detection part, and the air knife is used to blow the sealing nail area of the battery to be tested.

9. The battery airtightness detection mechanism according to claim 1, wherein, The helium pressing nozzle is provided with a first sealing member, and the helium leak detection nozzle is provided with a second sealing member.

10. A battery airtightness detection device, characterized in that, It includes the battery airtightness detection mechanism, a feeding device and a discharging device according to any one of claims 1-9. The feeding device and the discharging device are respectively arranged on one side of the battery airtightness detection mechanism; The feeding device includes a second moving module. The moving end of the second moving module is drivingly connected with a first handling member to move the battery to be tested to the detection part through the first handling member; The discharging device includes a third moving module. The moving end of the third moving module is drivingly connected with a second handling member to discharge the battery to be tested on the detection part.

Images