Detection device and air tightness detection method

Abstract

The invention discloses a detection device and an air tightness detection method, and relates to the technical field of air tightness detection. The detection device comprises a mounting rack which is provided with a bearing position, and the bearing position is used for bearing a to-be-detected object; the pressing mechanism comprises a pressing module and a connecting pipeline, the pressing module is fixed on the mounting frame, a first port of the connecting pipeline is communicated with the pressing module, a second port of the connecting pipeline is used for being communicated with a hole opening of the communicating hole in the to-be-detected object, and the pressing module is used for pressing along the connecting pipeline; and the detection mechanism comprises a supporting seat and a detection module, the supporting seat is fixed on the mounting frame, and the detection module is fixed on the supporting seat and is used for detecting the deformation quantity of the outer wall of the object to be detected.

Description

Technical Field

[0001] The present application relates to the technical field of airtightness detection, and in particular, to a detection device and an airtightness detection method. Background Art

[0002] Rechargeable batteries, also known as rechargeable batteries or storage batteries, are batteries that can be recharged to activate the active materials and continue to be used after being discharged. The recyclable nature of secondary batteries has made them gradually become the main source of power for electrical equipment. As the demand for secondary batteries gradually increases, people's requirements for their performance in all aspects are also getting higher and higher, especially the requirements for service life.

[0003] In the related art, secondary batteries are usually composed of an end cap unit, an electrode assembly and a shell. The actual production process is to make the end cap unit, the electrode assembly and the shell separately, and then use metal adapters to weld the electrode column of the end cap unit and the electrode lug of the electrode assembly respectively, and then put the electrode assembly into the shell, and then cover the opening of the shell with the end cap unit and weld and seal it to form the basic structure of the secondary battery. After that, the electrolyte is added through the injection hole set on the end cap unit by manual injection, and the injection hole is welded and sealed after completion.

[0004] Among them, the end cover unit includes a cover plate, a rubber nail and a sealing nail. The rubber nail is located in the injection hole on the cover plate, and the sealing nail is welded to the cover plate to block the injection hole. Since the rubber nail is usually made of rubber material and is easily damaged after long-term use, it is necessary to ensure the seal of the sealing nail welded on the cover plate. At present, the airtightness detection method is carried out by helium detection. However, the detection device used for helium detection has a complex detection structure and a cumbersome detection process. Therefore, a detection device and a detection method with a simple structure are urgently needed. Summary of the invention

[0005] A main purpose of the present application is to provide a detection device and an airtightness detection method, which can simplify the structural composition and detection process.

[0006] In order to achieve the above application purpose, this application adopts the following technical solutions:

[0007] According to one aspect of the present application, a detection device is provided, which includes: a mounting frame, the mounting frame having a bearing position, the bearing position being used to bear an object to be detected; a pressing mechanism, including a pressing module and a connecting pipeline, the pressing module being fixed to the mounting frame, the first port of the connecting pipeline being connected to the pressing module, and the second port being used to connect to the opening of an air hole on the object to be detected, the pressing module being used to press along the connecting pipeline; a detection mechanism, including a support seat and a detection module, the support seat being fixed to the mounting frame, the detection module being fixed to the support seat, and being used to detect the deformation amount of the outer wall of the object to be detected.

[0008] In the implementation mode of the present application, the pressure module can be used to pressurize along the connecting pipeline to cause the outer wall of the object to be detected to bulge when the air hole is not sealed well, and then the deformation of the outer wall can be detected by the detection module to determine the reliability of the air hole sealing based on whether the outer wall is deformed. In this way, after the object to be detected flows to the bearing position, the airtightness detection can be completed without shifting the object to be detected, thereby simplifying the detection device, simplifying the airtightness detection process, and reducing the detection cost.

[0009] According to one embodiment of the present application, the pressing mechanism further includes an air suction module, the first port of the connecting pipeline is also connected to the air suction module, and the air suction module is used to perform vacuum along the connecting pipeline before the pressing module is pressed.

[0010] In the implementation manner of the present application, by setting up the vacuum module, after the second port of the connecting pipeline is connected to the orifice of the air hole, the vacuum module can be used to perform vacuum testing along the connecting pipeline to detect the sealing reliability of the connection between the second port of the connecting pipeline and the orifice of the air hole.

[0011] According to an embodiment of the present application, the second port of the connecting pipeline has a sealing member.

[0012] In the implementation manner of the present application, a seal is provided to ensure the sealing between the second port of the connecting pipeline and the orifice of the air hole when the second port is connected to the orifice of the air hole, thereby avoiding misjudgment caused by leakage of high-pressure gas during pressurization.

[0013] According to an embodiment of the present application, the detection device further includes a lifting mechanism, the lifting mechanism is fixed on the mounting frame, and the second port of the connecting pipeline is fixed on the lifting mechanism.

[0014] In the implementation manner of the present application, the second port can be controlled by setting a lifting mechanism, and the airtightness of the connection between the second port and the orifice of the air hole can be ensured under the limit of the lifting mechanism, further ensuring the sealing between the second port of the connecting pipeline and the orifice of the air hole.

[0015] According to one embodiment of the present application, the detection device also includes an image acquisition mechanism; the image acquisition mechanism is fixed on the mounting frame and connected to the lifting mechanism, the image acquisition mechanism is used to obtain image information of the object to be detected, and the lifting mechanism is used to control the lifting of the second port according to the image information.

[0016] In the implementation manner of the present application, through the setting of the image acquisition mechanism, it is possible to confirm whether the air holes on the object to be inspected are sealed, so as to avoid invalid detection when the air holes are not sealed. The position information of the air holes can also be determined based on the image information obtained by the image acquisition mechanism, and then the second port can be controlled by the lifting mechanism to accurately connect with the orifice of the air hole to improve the accuracy of the operation.

[0017] According to an embodiment of the present application, the detection module is a distance sensor, and the distance sensor is used to detect the distance between the sensor and the outer wall of the object to be detected.

[0018] According to one embodiment of the present application, the detection module includes a transmitter and a receiver; the support base includes a first bracket and a second bracket, the first bracket and the second bracket are both fixed on the mounting frame, the transmitter is fixed on the first bracket, the receiver is fixed on the second bracket, and the transmitter and the receiver are both located above the bearing position.

[0019] According to an embodiment of the present application, the detection device further includes a positioning mechanism, which is fixed on the mounting frame and is used to limit the position of the mechanism to be detected on the bearing position.

[0020] In the implementation manner of the present application, by setting the positioning mechanism, it is easy to achieve the positioning of the object to be detected on the carrying position, avoiding the displacement of the object to be detected during subsequent operations, thereby ensuring the accuracy of subsequent airtightness detection.

[0021] According to one aspect of the present application, an airtightness detection method is provided, the method being applied to the detection device described in the above aspect, the method comprising:

[0022] After the object to be detected flows to the supporting position on the mounting frame, the second port of the connecting pipeline is controlled to connect to the opening of the air hole on the object to be detected; the pressurizing module is controlled to pressurize along the connecting pipeline to a first preset pressure, wherein the first preset pressure is greater than or equal to 200 KPa and less than or equal to 1000 KPa, and the air pressure of the first preset pressure can open the air hole; the first deformation parameter of the object to be detected is obtained, and the first deformation parameter is obtained by the detection mechanism detecting the outer wall of the object to be detected under the first preset pressure; if it is determined based on the first deformation parameter that the outer wall of the object to be detected is deformed, it is confirmed that the air tightness of the object to be detected is unqualified.

[0023] In the implementation mode of the present application, after the object to be detected is transferred to the bearing position on the mounting frame, the sealing pin can be pressed to a first preset pressure along the connecting pipeline by the pressing module, so as to cause the outer wall of the object to be detected to bulge when the air hole is not sealed well, and then the deformation of the outer wall can be detected by the detection mechanism, so as to determine the reliability of the air hole sealing based on whether the outer wall is deformed based on the first deformation parameter. In this way, the airtightness detection can be completed without shifting the object to be detected on the bearing position, thereby simplifying the detection device, simplifying the airtightness detection process, and reducing the detection cost.

[0024] According to an embodiment of the present application, after obtaining the first deformation parameter of the object to be detected, the method further includes:

[0025] If it is determined based on the first deformation parameter that the outer wall of the object to be detected has not been deformed, then a first pressure drop value of the first preset pressure within a first preset time period is determined; if the first pressure drop value is less than a first reference value, then it is confirmed that the air tightness of the object to be detected is qualified.

[0026] According to an embodiment of the present application, wherein the first preset pressure is greater than or equal to 600 KPa and less than or equal to 1000 KPa, controlling the pressurizing module to pressurize along the connecting pipeline to the first preset pressure includes:

[0027] Control the pressurizing module to pressurize along the connecting pipeline to a second preset pressure, wherein the second preset pressure is greater than or equal to 200 KPa and less than 400 KPa; determine a second pressure drop value of the second preset pressure within a second preset time period; if the second pressure drop value is less than a second reference value, control the pressurizing module to continue pressurizing along the connecting pipeline to a third preset pressure, wherein the third preset pressure is greater than or equal to 400 KPa and less than 600 KPa; determine a third pressure drop value of the third preset pressure within a third preset time period; if the third pressure drop value is less than a third reference value, control the pressurizing module to continue pressurizing along the connecting pipeline to the first preset pressure.

[0028] In the implementation manner of the present application, multiple progressive pressurizations can reduce the possibility of direct explosion of the outer wall of the object to be detected.

[0029] According to an embodiment of the present application, before the control pressurizing module pressurizes along the connecting pipeline to the first preset pressure, it also includes:

[0030] Control the vacuum module to vacuum along the connecting pipeline to a fourth preset pressure; determine a fourth pressure drop value of the fourth preset pressure within a fourth preset time period; if the fourth pressure drop value is less than a fourth reference value, confirm that the second port is sealed and connected to the orifice of the air hole.

[0031] According to one embodiment of the present application, before the second end cover of the control connection pipeline is covered on the welded sealing pin, it also includes:

[0032] The positioning mechanism is controlled to clamp the energy storage device on the bearing position.

[0033] According to an embodiment of the present application, before the second port of the control connection pipeline is connected to the orifice of the air hole on the object to be detected, it also includes:

[0034] Acquire image information of the object to be detected; and determine, based on the image information, that the air-injection hole of the object to be detected is in a blocked state.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0037] Figure 1 is a schematic diagram of the axial structure of an energy storage device according to an exemplary embodiment.

[0038] Figure 2 yes Figure 1 The cross-sectional structure diagram of the energy storage device along line AA is shown.

[0039] Figure 3 yes Figure 2 A locally enlarged structural schematic diagram of the energy storage device shown.

[0040] Figure 4 It is a structural schematic diagram of an energy storage device during detection according to an exemplary embodiment.

[0041] Figure 5 It is a schematic structural diagram of a detection device according to an exemplary embodiment.

[0042] Figure 6 It is a schematic structural diagram of a detection device according to an exemplary embodiment.

[0043] Figure 7 The figure is a schematic diagram of a top view of the structure of an energy storage device before being pressed according to an exemplary embodiment.

[0044] Figure 8 It is a schematic diagram of a top view of the structure of an energy storage device after being compressed according to an exemplary embodiment.

[0045] Fig. 9 It is a structural schematic diagram of another energy storage device during detection according to an exemplary embodiment.

[0046] Fig.10 It is a flowchart of an airtightness detection method according to an exemplary embodiment.

[0047] The reference numerals are described as follows:

[0048] 10. Energy storage device; 20. Detection device;

[0049] 11. Shell; 12. Electrode assembly; 13. End cap assembly;

[0050] 111, accommodating chamber;

[0051] 131, cover plate; 132, injection hole; 133, glue nail; 134, sealing nail; 135, cavity;

[0052] 21. Mounting frame; 22. Pressing mechanism; 23. Detecting mechanism; 24. Lifting mechanism; 25. Image acquisition mechanism; 26. Positioning mechanism; 27. Controller;

[0053] 211, bearing position;

[0054] 221, pressure module; 222, air extraction module; 223, connecting pipeline; 224, sealing element; 225, first port; 226, second port;

[0055] 231. Support base; 232. Detection module; 233. Transmitter; 234. Receiver. DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0057] The embodiment of the present application provides an energy storage device 10, which can be a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the energy storage device 10 can be cylindrical, flat, rectangular, etc., which is not limited in the embodiment of the present application.

[0058] In some embodiments, Figure 1 and Figure 2 As shown, the energy storage device 10 includes: a shell 11, an electrode assembly 12 and an end cover assembly 13. The shell 11 has an open accommodating cavity 111. The electrode assembly 12 is accommodated in the accommodating cavity 111. The end cover assembly 13 seals the opening of the accommodating cavity 111.

[0059] like Figure 2 and Figure 3 As shown, the end cover assembly 13 includes a cover plate 131, a glue nail 133 and a sealing nail 134. The cover plate 131 seals the opening of the housing 11. The cover plate 131 is provided with a liquid injection hole 132. The glue nail 133 is located in the liquid injection hole 132 on the cover plate 131. The sealing nail 134 is welded to the opening of the liquid injection hole 132. In this way, the liquid injection hole 132 is firstly sealed by the glue nail 133, and secondarily sealed by the sealing nail 134, so as to ensure the reliability of sealing the liquid injection hole 132.

[0060] Among them, the glue nail 133 is usually sealed in the injection hole 132 with an interference fit to achieve the primary sealing of the injection hole 132, and the sealing nail 134 is usually welded to the orifice of the injection hole 132 to achieve the secondary sealing of the injection hole 132. In order to ensure the reliability of the sealing nail 134 sealing the injection hole 132, an airtightness test will be performed after the welding of the sealing nail 134 is completed. The detection device 20 in the related art is to perform helium pressure along the weld of the sealing nail 134 after the welding of the sealing nail 134 is completed, and then transferred to the helium detection chamber for helium detection to detect whether there is any helium leakage, so as to confirm the reliability of the sealing of the sealing nail 134.

[0061] The present application proposes a detection device 20, which is used to detect the air tightness of an object to be detected (including the energy storage device 10 described above).

[0062] like Figure 4 , Figure 5 and Figure 6 As shown, the detection device 20 includes: a mounting frame 21, a pressing mechanism 22 and a detection mechanism 23. The mounting frame 21 has a bearing position 211, and the bearing position 211 is used to bear the object to be detected (such as the energy storage device 10); the pressing mechanism 22 includes a pressing module 221 and a connecting pipeline 223. The pressing module 221 is fixed on the mounting frame 21, and the first port 225 of the connecting pipeline 223 is connected to the pressing module 221, and the second port 226 is used to connect to the opening of the air hole on the object to be detected (such as the weld covering the sealing pin 134 on the end cover assembly 13), and the pressing module 221 is used to press along the connecting pipeline 223; the detection mechanism 23 includes a support seat 231 and a detection module 232. The support seat 231 is fixed on the mounting frame 21, and the detection module 232 is fixed on the support seat 231, and is used to detect the deformation of the outer wall of the object to be detected (such as the shell 11 of the energy storage device 10).

[0063] In the embodiment of the present application, for the detection device 20 including the pressing mechanism 22 and the detection mechanism 23, the sealing pin 134 can be pressed along the connecting pipe 223 by the pressing module 221, so as to cause the shell wall of the shell 11 to bulge when the sealing pin 134 is not welded well, and then the deformation of the shell 11 can be detected by the detection module 232, so as to determine the reliability of the welding of the sealing pin 134 on the basis of determining whether the shell 11 is deformed. In this way, after the energy storage device 10 flows to the bearing position 211, the airtightness detection can be completed without shifting the energy storage device 10, thereby simplifying the detection device 20, simplifying the airtightness detection process, and reducing the detection cost.

[0064] Among them, the pressurizing module 221 can be a booster pump, etc., as long as it can provide a higher inflation pressure. When the pressurizing module 221 is used to pressurize along the connecting pipeline 223, the pressurized gas can be air, helium, etc., and the maximum pressure during pressurization should be less than the bearing limit of the object to be detected (such as the cover 131 of the energy storage device 10) to avoid deformation of the cover 131, and the air pressure during the pressurization process can open the inflation hole (such as pressing the glue nail 133 in the injection hole 132 into the accommodating cavity 111 of the shell 11) to ensure that when the inflation hole is not sealed (such as the welding of the sealing nail 134 at the mouth of the injection hole 132), the high-pressure gas can enter the object to be detected (such as the accommodating cavity 111 of the shell 11).

[0065] For example, the pressure of the pressing module 221 when pressing along the connecting pipeline 223 can be controlled between 200KPa-1000KPa, that is, the pressure during pressing is greater than or equal to 200KPa and less than or equal to 1000KPa, so as to avoid deformation of the cover plate 131 and ensure that the seal nail 133 can be pressed into the accommodating cavity 111 of the housing 11 when a weld appears at the welding joint of the sealing nail 134. For example, the pressure during pressing can be 200KPa, 300KPa, 400KPa, 500KPa, 600KPa, 700KPa, 800KPa, 900KPa, 1000KPa, etc.

[0066] It should be noted that if Figure 3 As shown, after the sealing pin 134 is welded to the opening of the injection hole 132, a cavity 135 is formed between the lower surface of the sealing pin 134 and the upper surface of the glue pin 133, so that when there is a weld at the welding point of the sealing pin 134, the high-pressure gas can enter the cavity 135 along the weld during pressurization and press the glue pin 133 into the accommodating cavity 111 of the shell 11.

[0067] In addition, when the pressure module 221 is controlled to pressurize along the connecting pipe 223, it can be pressed to a higher pressure at one time, or it can be pressed progressively, that is, pressed to a higher pressure by pressing multiple times. In this way, the shell 11 can be prevented from exploding due to its weak pressure bearing capacity by pressing progressively.

[0068] The detection module 232 can perform detection during each pressurization process or after each pressurization is completed; if the shell 11 is detected to be deformed during the pressurization process, the pressurization can be terminated to save subsequent operations and reduce the risk of the shell 11 exploding. In addition, in the case of multiple pressurizations, the detection can be performed for each pressurization or after multiple pressurizations are completed. As long as the detection module 232 detects that the shell 11 is deformed, it can be determined that the airtightness of the energy storage device 10 is unqualified, so that the subsequent pressurization operation can be terminated, and the risk of the shell 11 exploding can be reduced.

[0069] It should be noted that the pressing pressure of the pressing module 221, the detection timing of the detection module 232, the result judgment of the detection module 232, etc. can be controlled manually and can be controlled by the controller 27. Figure 5 As shown, the detection device 20 also includes a controller 27, such as a programmable logic controller. The controller 27 is electrically connected to the pressing module 221 and the detection module 232, respectively, so as to control the pressing pressure of the pressing module 221 through the controller 27, and control the detection module 232 to perform detection after the pressing is completed, and determine whether the air tightness is qualified based on the detected deformation parameters, etc., so as to reduce human participation and improve the degree of automation of the detection device 20.

[0070] During the actual testing process, the maximum pressure of the pressurizing module 221 is 800 KPa, and the pressurization is performed in three times. As an example: after the energy storage device 10 flows to the bearing position 211, the second port 226 of the connecting pipeline 223 is covered on the sealing pin 134, and the pressurizing module 221 is controlled to perform the first pressurization along the connecting pipeline 223 to 300 KPa; then the second pressurization is performed to 500 KPa; then the third pressurization is performed to 800 KPa. Take the inspection after the third pressurization as an example: if the welding of the sealing nail 134 is poor (that is, there is a weld), the high-pressure gas during pressurization can enter the injection hole 132 along the weld and press the glue nail 133 into the accommodating cavity 111 of the shell 11. At this time, the high-pressure gas enters the accommodating cavity 111 of the shell 11 and causes the shell 11 to bulge; if the welding of the sealing nail 134 is good (that is, there is no weld), the high-pressure gas during pressurization will not enter the injection hole 132 and will not cause the shell 11 to bulge; after the completion of After the third pressurization, the deformation parameters of the shell 11 are detected by the detection module 232. If it is determined based on the deformation parameters that the shell 11 is deformed, it indicates that the high-pressure gas enters the accommodating cavity 111 of the shell 11, and it can be determined that there is a weld after the sealing pin 134 is welded, that is, the airtightness of the energy storage device 10 is unqualified; if it is determined based on the deformation parameters that the shell 11 is not deformed, it indicates that the high-pressure gas does not enter the accommodating cavity 111 of the shell 11, and it can be determined that there is no weld after the sealing pin 134 is welded, that is, the airtightness of the energy storage device 10 is qualified.

[0071] Among them, when it is shown that the high-pressure gas has not entered the accommodating cavity 111 of the shell 11, in addition to the fact that there is no weld after the sealing nail 134 is welded, it is also possible that there is a seam between the second port 226 of the connecting pipeline 223 and the cover plate 131, and the high-pressure gas leaks along the seam, resulting in the failure to enter the accommodating cavity 111 of the shell 11. Therefore, before finally confirming that there is no weld after the sealing nail 134 is welded, it is also possible to determine the pressure drop value within a preset time after completing the third pressurization. If the pressure drop value is less than the reference pressure, it indicates that there is a seam between the second port 226 of the connecting pipeline 223 and the cover plate 131, so it can be determined that the high-pressure gas has not entered the accommodating cavity 111 of the shell 11, and there is no weld after the sealing nail 134 is welded.

[0072] In addition, when the pressurization is performed three times, a pressure drop test can be performed after each pressurization to determine whether there is a weld after the sealing pin 134 is welded, based on the deformation parameters of the shell 11, without leakage of high-pressure gas between the second port 226 of the connecting pipe 223 and the cover plate 131 during each pressurization process.

[0073] In some embodiments, Figure 4 or Figure 5 ,as well as Figure 6 As shown, the second port 226 of the connecting pipe 223 has a sealing member 224. Thus, the sealing member 224 is provided to ensure the sealing between the second port 226 of the connecting pipe 223 and the opening of the air-injection hole when the second port 226 of the connecting pipe 223 is connected to the air-injection hole of the object to be detected, thereby avoiding misjudgment caused by leakage of high-pressure gas during pressure injection.

[0074] In view of the fact that the object to be detected is the energy storage device 10 , the seal 224 provided at the second port 226 of the connecting pipeline 223 abuts against the cover plate 131 of the energy storage device 10 , thereby ensuring the sealing between the second port 226 and the cover plate 131 .

[0075] The seal 224 is a cylindrical structure, and is sleeved on the second port 226 of the connecting pipe 223 to ensure the stability of the seal 224 when assembled on the connecting pipe 223, and to ensure the sealing performance between the seal 224 and the second port 226 of the connecting pipe 223 during assembly.

[0076] Optionally, the axial portion of the seal 224 extends out of the end surface of the second port 226 of the connecting pipe 223, so that when the second port 226 of the connecting pipe 223 abuts against the cover plate 131, the sealing performance of the abutment with the cover plate 131 can be ensured by the deformation of the portion of the seal 224 extending out of the second port 226.

[0077] Optionally, the outer wall of the second port 226 of the connecting pipeline 223 is a threaded structure, which can increase the contact area between the seal 224 and the outer wall of the second port 226, thereby ensuring the sealing between the seal 224 and the second port 226 when the seal 224 is sleeved on the second port 226.

[0078] In some embodiments, Figure 5 and Figure 6 As shown, the detection device 20 further includes a lifting mechanism 24 , which is fixed on the mounting frame 21 , and the second port 226 of the connecting pipeline 223 is fixed on the lifting mechanism 24 .

[0079] In this way, through the setting of the lifting mechanism 24, the second port 226 can be controlled, and under the limit of the lifting mechanism 24, the abutment force between the second port 226 and the object to be detected (such as the cover plate 131) can be guaranteed, and the sealing between the second port 226 of the connecting pipe 223 and the object to be detected (such as the cover plate 131) can be further guaranteed.

[0080] In combination with the controller 27 described above, the lifting mechanism 24 can be connected to the controller 27 to realize automatic lifting of the lifting mechanism 24 through the controller 27, thereby improving the automation level of the detection device 20.

[0081] In some embodiments, Figure 5 and Figure 6 As shown, the detection device 20 also includes an image acquisition mechanism 25, which is fixed on the mounting frame 21 and connected to the lifting mechanism 24. The image acquisition mechanism 25 is used to obtain image information of the object to be detected (such as the cover 131), and the lifting mechanism 24 is used to control the lifting of the second port 226 according to the image information of the cover 131.

[0082] In this way, through the setting of the image acquisition mechanism 25, it is possible to confirm whether the air holes on the object to be inspected are sealed (for example, whether the sealing pin 134 on the injection hole 132 is welded) to ensure the reliability of the airtightness detection, and the position information of the air hole (such as the sealing pin 134) can be determined according to the image information obtained by the image acquisition mechanism 25, and then the second port 226 is controlled by the lifting mechanism 24 to be accurately connected with the orifice of the air hole (for example, accurately covered on the sealing pin 134) to improve the accuracy of the operation.

[0083] In combination with the controller 27 described above, the image acquisition mechanism 25 is connected to the lifting mechanism 24 through the controller 27, that is, the image acquisition mechanism 25 can transmit the acquired image information of the cover plate 131 to the controller 27, and the controller 27 determines the position of the sealing pin 134 on the cover plate 131 according to the image information of the cover plate 131, and then controls the lifting and lowering of the lifting mechanism 24 according to the position of the sealing pin 134, so as to control the second port 226 of the connecting pipeline 223 to cover the sealing pin 134. In addition, the lifting mechanism 24 can be a general structural component with only the lifting function, or a structural component with the functions of lifting and swinging arms, so as to ensure that the lifting mechanism 24 can drive the second port 226 of the connecting pipeline 223 to move arbitrarily and accurately cover the sealing pin 134.

[0084] In some embodiments, Figure 4 or Figure 5 As shown, the detection device 20 further includes a positioning mechanism 26 , which is fixed on the mounting frame 21 . The positioning mechanism 26 is used to limit the position of the object to be detected (such as the energy storage device 10 ) on the bearing position 211 .

[0085] In this way, by setting the positioning mechanism 26 , it is easy to position the energy storage device 10 on the bearing position 211 , avoiding displacement of the energy storage device 10 during subsequent operations, thereby ensuring the accuracy of subsequent airtightness testing.

[0086] The positioning mechanism 26 can be a positioning clamp, etc., as long as it can limit the energy storage device 10. In addition, in combination with the controller 27 described above, the positioning mechanism 26 is connected to the controller 27 to control the positioning mechanism 26 through the controller 27, thereby realizing the automation of the detection device 20.

[0087] In some embodiments, Figure 5 and Figure 6 As shown, the pressing mechanism 22 further includes an air extraction module 222 , and the first port 225 of the connecting pipeline 223 is also connected to the air extraction module 222 , and the air extraction module 222 is used to perform vacuuming along the connecting pipeline 223 before the pressing module 221 performs pressing.

[0088] In this way, through the setting of the vacuum module 222, after the second port 226 of the connecting pipe 223 is connected to the opening of the air hole (such as the sealing pin 134 covered on the cover plate 131), the vacuum detection can be performed along the connecting pipe 223 through the vacuum module 222 to detect the sealing reliability of the connection between the second port 226 of the connecting pipe 223 and the opening of the air hole (such as detecting the sealing reliability of the abutment with the cover plate 131).

[0089] Among them, the vacuum module 222 can be a vacuum pump, etc. When performing vacuum detection, the reliability of the sealing between the second port 226 of the connecting pipe 223 and the cover plate 131 can be determined by checking whether the pressure drop value of the connecting pipe 223 is greater than a reference value after vacuuming.

[0090] Among them, the first port 225 of the connecting pipeline 223 can be connected to the pressure module 221 and the air extraction module 222 through a three-way electromagnetic valve to ensure the connection between the pressure module 221 and the connecting pipeline 223 during pressure application, and the connection between the air extraction module 222 and the connecting pipeline 223 during air extraction. In combination with the controller 27 described above, the air extraction module 222 is connected to the controller 27 so that the air extraction module 222 can be controlled by the controller 27, thereby realizing the automation of the detection device 20; in addition, after the air extraction module 222 is vacuumed, it is convenient to determine the reliability of the abutment and sealing between the second port 226 of the connecting pipeline 223 and the cover plate 131 according to the pressure drop value through the controller 27.

[0091] In the implementation manner of the present application, the detection module 232 included in the detection mechanism 23 is mainly used to detect whether the outer wall of the object to be detected (such as the shell 11 of the energy storage device 10) is deformed.

[0092] In some embodiments, the detection module 232 is a distance sensor, and the distance sensor is used to detect the distance between the sensor and the outer wall of the object to be detected.

[0093] In this way, the distance between the outer wall of the shell 11 can be detected by the distance sensor before and after pressing to confirm whether the detected distance becomes smaller after pressing. If the detected distance becomes smaller after pressing, it means that the shell wall of the shell 11 bulges toward the distance sensor, and it can be confirmed that the shell 11 is deformed.

[0094] Among them, the detection mechanism 23 may include multiple distance sensors, all of which are fixed on the support seat 231, and the detection ends of the multiple distance sensors are all facing the energy storage device 10 carried on the carrying position 211 (they can all be facing the shell wall with the largest area on the same side of the shell 11, or they can be facing the shell walls on different sides of the shell 11 respectively), so as to ensure the accuracy of detection through multiple distance sensors and avoid misjudgment due to local deformation of the shell 11.

[0095] In other embodiments, Figure 7 or Figure 8 As shown, the detection module 232 includes a transmitter 233 and a receiver 234, and the support base 231 includes a first bracket (not shown in the figure) and a second bracket (not shown in the figure), and the first bracket (not shown in the figure) and the second bracket (not shown in the figure) are both fixed on the mounting frame 21, the transmitter 233 is fixed on the first bracket, and the receiver 234 is fixed on the second bracket, and the transmitter 233 and the receiver 234 are both located above the bearing position 211.

[0096] Among them, Figure 7 As shown, the transmitter 233 is used to emit a light beam (such as laser, infrared light, etc.), and the receiver 234 is used to receive the light beam emitted by the transmitter 233. The light beam is parallel to one side of the outer wall of the object to be detected (such as the large shell surface of the housing 11), and there is a certain gap between the light beam and the outer wall of the object to be detected, so as to ensure that the receiver 234 can normally receive the light beam emitted by the transmitter 233 before the pressing module 221 presses; Figure 8 As shown, after the outer wall of the object to be detected (such as the large shell surface of the shell 11 ) is deformed, the light beam can be blocked by the protrusion of the shell, so that the receiver 234 cannot receive the light beam emitted by the transmitter 233 .

[0097] In this way, when the transmitter 233 and the receiver 234 are used for detection, it can be directly determined whether the shell 11 bulges after being pressed based on whether the receiver 234 can receive the light beam emitted by the transmitter 233, and then it can be confirmed whether the shell 11 is deformed.

[0098] The detection mechanism 23 may include a plurality of detection modules 232, that is, a plurality of pairs of transmitters 233 and receivers 234. The straight lines where the light beams in each pair of transmitters 233 and receivers 234 are located may be parallel to each other or may intersect. Fig. 9As shown, the detection mechanism 23 includes two pairs of transmitters 233 and receivers 234. The light beam between the first pair of transmitters 233 and receivers 234 is parallel to the shell wall with the largest area on the shell 11 in the horizontal direction, and the light beam between the second pair of transmitters 233 and receivers 234 is along the diagonal direction of the shell wall with the largest area on the shell 11 and is parallel to the shell wall.

[0099] It should be noted that the detection module 232 can be other devices in addition to the distance sensor, or the transmitter 233 and the receiver 234 described above, as long as it can detect that the shell 11 is deformed. For example, the detection module 232 is a resistance detector, and specifically the resistance detector includes a connection circuit and an electrode sheet. After the energy storage device 10 flows to the bearing position 211, there is a certain distance between the shell wall of the shell 11 and the electrode sheet, and then the resistance between the electrode sheet and the shell wall of the shell 11 can be detected before and after pressing to confirm whether the resistance detected after pressing becomes smaller. If the resistance detected after pressing becomes smaller, it means that the shell wall of the shell 11 bulges toward the electrode sheet, and it can be confirmed that the shell wall of the shell 11 is deformed.

[0100] The embodiment of the present application provides an airtightness detection method, which is applied to the detection device 20 described in the above embodiment and is used to perform airtightness detection on an object to be detected (such as the energy storage device 10 described above). Fig.10 As shown, the method includes steps S110 to S140.

[0101] Step S110 , after the object to be detected is transferred to the carrying position 211 on the mounting frame 21 , the second port 226 of the connecting pipe 223 is controlled to be connected to the opening of the air hole on the object to be detected.

[0102] Step S120, control the pressurizing module 221 to pressurize along the connecting pipeline 223 to a first preset pressure, the first preset pressure is greater than or equal to 200 KPa and less than or equal to 1000 KPa, and the air pressure of the first preset pressure can open the air hole.

[0103] Step S130 , obtaining a first deformation parameter of the object to be detected, where the first deformation parameter is obtained by the detection mechanism 23 detecting the outer wall of the object to be detected under a first preset pressure.

[0104] Step S140: If it is determined based on the first deformation parameter that the outer wall of the object to be inspected is deformed, it is confirmed that the airtightness of the object to be inspected is unqualified.

[0105] In the embodiment of the present application, after the object to be detected flows to the bearing position 211 on the mounting frame 21, the sealing pin 134 can be pressed to a first preset pressure along the connecting pipe 223 by the pressing module 221, so as to cause the outer wall of the object to be detected to bulge when the air hole is not sealed well, and then the deformation amount of the outer wall can be detected by the detection mechanism 23, so as to determine the reliability of the air hole sealing based on whether the object to be detected is deformed based on the first deformation parameter. In this way, after the object to be detected flows to the bearing position 211, the airtightness detection can be completed without shifting, thereby simplifying the detection device 20, simplifying the airtightness detection process, and reducing the detection cost.

[0106] In the above step S110, the object to be detected can be transferred to the carrying position 211 of the mounting frame 21 by means of a conveyor belt or the like, or can be transferred to the carrying position 211 of the mounting frame 21 by means of a carrying arm or the like. In addition, one object to be detected can be transferred to the carrying position 211, or multiple objects to be detected distributed in an array can be transferred to the carrying position 211, so as to perform synchronous detection on multiple objects to be detected to improve detection efficiency.

[0107] After the object to be detected is transferred to the bearing position 211 on the mounting frame 21, the second port 226 of the connecting pipe 223 can be directly controlled to connect to the opening of the air hole; the positioning mechanism 26 can also be controlled to clamp the object to be detected on the bearing position 211, and then the second port 226 of the connecting pipe 223 can be controlled to connect to the opening of the air hole on the object to be detected. In this way, the positioning mechanism 26 clamps the object to be detected to achieve the position limit of the object to be detected, so that when the second end of the connecting pipe 223 is controlled, the displacement of the object to be detected can be avoided.

[0108] Furthermore, in combination with the image acquisition mechanism 25 described in the above embodiment, after the object to be inspected flows to the carrying position 211, the image information of the object to be inspected can also be obtained first, so as to determine whether the air holes of the object to be inspected are in a blocked state based on the image information, so as to ensure the effectiveness of the airtightness detection of the object to be inspected.

[0109] In addition, after obtaining the image information of the object to be detected, the position information of the air hole can also be determined based on the image information, and then the second port 226 of the connecting pipe 223 and the orifice of the air hole can be controlled based on the position information of the air hole to ensure the accuracy of the connection between the second port 226 of the connecting pipe 223 and the air hole.

[0110] In the above step S120, the first preset pressure of the pressing module 221 is controlled to be greater than or equal to 200 KPa and less than or equal to 1000 KPa. For example, the first preset pressure is 200 KPa, 300 KPa, 400 KPa, 500 KPa, 600 KPa, 700 KPa, 800 KPa, 900 KPa, 1000 KPa, etc.

[0111] In addition, when the pressure is applied along the connecting pipeline 223, the pressure may be applied to the first preset pressure at one time, or may be applied to the first preset pressure in multiple steps. When the first preset pressure is relatively high, the direct explosion of the outer wall of the object to be detected may be reduced by applying pressure in multiple steps. For example, the pressure may be applied to the first preset pressure twice, three times, or four times.

[0112] Optionally, the first preset pressure is greater than or equal to 600 KPa and less than or equal to 1000 KPa, and taking three progressive pressurizations as an example, step S120 includes: controlling the pressurization module 221 to pressurize along the connecting pipeline 223 to a second preset pressure, the second preset pressure is greater than or equal to 200 KPa and less than 400 KPa; determining a second pressure drop value of the second preset pressure within a second preset time length; if the second pressure drop value is less than a second reference value, controlling the pressurization module 221 to continue pressurizing along the connecting pipeline 223 to a third preset pressure, the third preset pressure is greater than or equal to 400 KPa and less than 600 KPa; determining a third pressure drop value of the third preset pressure within a third preset time length; if the third pressure drop value is less than a third reference value, controlling the pressurization module 221 to continue pressurizing along the connecting pipeline 223 to the first preset pressure.

[0113] For example, the first preset pressure may be 600 KPa, 700 KPa, 800 KPa, 900 KPa, etc., the second preset pressure may be 200 KPa, 250 KPa, 300 KPa, 350 KPa, etc., the corresponding second preset time length is 1-5 seconds, such as 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, etc., the second reference value is greater than or equal to 1 and less than or equal to 3 KPa, such as 1 KPa, 1.5 KPa, 2 KPa, 2.5 KPa, 3.0KPa, etc.; the third preset pressure can be 400KPa, 450KPa, 500KPa, 550KPa, etc., and the corresponding third preset time length is 1-10 seconds, such as 1 second, 2 seconds, 4 seconds, 6 seconds, 8 seconds, 10 seconds, etc., and the third reference value is greater than or equal to 2KPa and less than or equal to 5KPa, such as 2KPa, 2.5KPa, 3KPa, 3.5KPa, 4KPa, 4.5KPa, 5KPa, etc. After completing the pressurization of the second preset pressure and the third preset pressure, the reliability of the two progressive pressurizations can be determined according to the corresponding second pressure drop value and third pressure drop value, so as to avoid misjudgment due to leakage between the second port 226 of the connecting pipeline 223 and the orifice of the air hole.

[0114] In addition, in combination with the vacuum module 222 described in the above embodiment, before step S120, a vacuum test can also be performed through the vacuum module 222. Specifically, the vacuum module 222 is controlled to vacuum along the connecting pipeline 223 to a fourth preset pressure; a fourth pressure drop value of the fourth preset pressure within a fourth preset time period is determined; if the fourth pressure drop value is less than the fourth reference value, it is confirmed that the second port 226 is sealed and connected to the orifice of the air hole.

[0115] In this way, the fourth pressure drop value corresponding to the fourth preset pressure can be used to determine the sealing performance of the connection between the second port 226 of the connecting pipe 223 and the air hole after the second port 226 is connected to the orifice of the air hole, so as to avoid affecting the reliability of subsequent pressure testing due to sealing problems.

[0116] Among them, the fourth preset pressure can be 5-50KPa, such as 5KPa, 10KPa, 15KPa, 20KPa, 25KPa, 30KPa, 35KPa, 40KPa, 45KPa, 50KPa, etc., and the corresponding fourth reference value is greater than or equal to 50Pa and less than or equal to 1000Pa, such as 50Pa, 100Pa, 200Pa, 400Pa, 600Pa, 800Pa, 1000Pa, etc.

[0117] In the above step S130, the first deformation parameter obtained can be specifically determined according to the type of the detection module 232 described in the above embodiment. For example, if the detection module 232 is a distance sensor, the first deformation parameter is the distance between the distance sensor and the outer wall of the object to be detected after pressing; if the detection module 232 is a transmitter 233 and a receiver 234, the first deformation parameter is the signal fed back by the receiver 234 (the signal corresponding to the light beam is not received or the signal corresponding to the light beam is received).

[0118] It should be noted that, for the first deformation parameter obtained, combined with the above-mentioned multiple progressive pressing methods, the first deformation parameter can be obtained by real-time detection during each pressing process, or it can be obtained by detection after each pressing is completed, so as to shorten the airtightness detection time and improve the detection efficiency when the airtightness of the object to be detected is unqualified.

[0119] In the above step S140, for determining whether the outer wall of the object to be detected is deformed based on the first deformation parameter, at this time, when the detection module 232 is a distance sensor, the controller 27 pre-stores the distance between the distance sensor and the outer wall of the object to be detected before pressing. At this time, the distances between the two can be compared. If the distance measured after pressing is smaller than the distance before pressing, it indicates that the outer wall of the object to be detected is deformed. If the distance measured after pressing is equal to the distance before pressing, it indicates that the outer wall of the object to be detected is not deformed. When the detection module 232 includes a transmitter 233 and a receiver 234, the controller 27 can directly determine whether the shell 11 is deformed based on the signal fed back by the receiver 234.

[0120] In addition, step S130 also includes: if it is determined based on the first deformation parameter that the outer wall of the object to be detected is not deformed, then the first pressure drop value of the first preset pressure within the first preset time period can be further determined, and if the first pressure drop value is greater than the first reference value, it is confirmed that the air tightness of the object to be detected is qualified. In this way, it is determined that the high-pressure gas under the first preset pressure has not leaked and has not entered the object to be detected from the air-punching hole, thereby ensuring the sealing reliability of the air-punching hole, that is, the air tightness of the object to be detected is qualified.

[0121] For example, the first preset time length is 1-60 seconds, such as 1 second, 5 seconds, 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds, 60 seconds, etc., and the first reference value is greater than or equal to 3 KPa and less than or equal to 10 KPa, such as 3 KPa, 4 KPa, 5 KPa, 6 KPa, 7 KPa, 8 KPa, 9 KPa, 10 KPa, etc.

[0122] In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0123] In the description of the implementation methods of the present application, it needs to be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the implementation methods of the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the implementation methods of the present application.

[0124] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the implementation of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0125] The above are only preferred embodiments of the implementation methods of the present application, and are not intended to limit the implementation methods of the present application. For those skilled in the art, the implementation methods of the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the implementation methods of the present application shall be included in the protection scope of the implementation methods of the present application.

Claims

1. A detection device, characterized in that: The detection device (20) comprises: A mounting frame (21), wherein the mounting frame (21) has a bearing position (211), and the bearing position (211) is used to bear an object to be detected; A pressing mechanism (22), comprising a pressing module (221) and a connecting pipeline (223), wherein the pressing module (221) is fixed on the mounting frame (21), a first port (225) of the connecting pipeline (223) is connected to the pressing module (221), and a second port (226) is used to connect to an opening of an air hole on the object to be detected, and the pressing module (221) is used to perform pressing along the connecting pipeline (223); The detection mechanism (23) comprises a support seat (231) and a detection module (232), wherein the support seat (231) is fixed on the mounting frame (21), and the detection module (232) is fixed on the support seat (231) and is used to detect the deformation amount of the outer wall of the object to be detected.

2. The detection device according to claim 1, characterized in that The pressing mechanism (22) further comprises an air extraction module (222), and the first port (225) of the connecting pipeline (223) is also connected to the air extraction module (222), and the air extraction module (222) is used to perform vacuum extraction along the connecting pipeline (223) before the pressing module (221) performs pressing.

3. The detection device according to claim 1, characterized in that: The second port (226) of the connecting pipeline (223) has a sealing member (224).

4. The detection device according to any one of claims 1 to 3, characterized in that: The detection device (20) further comprises a lifting mechanism (24), wherein the lifting mechanism (24) is fixed on the mounting frame (21), and the second port (226) of the connecting pipeline (223) is fixed on the lifting mechanism (24).

5. The detection device according to claim 4, characterized in that: The detection device (20) further comprises an image acquisition mechanism (25); The image acquisition mechanism (25) is fixed on the mounting frame (21) and connected to the lifting mechanism (24); the image acquisition mechanism (25) is used to acquire image information of the object to be detected; and the lifting mechanism (24) is used to control the lifting of the second port (226) according to the image information.

6. The detection device according to claim 1, characterized in that: The detection module (232) is a distance sensor, and the distance sensor is used to detect the distance between the sensor and the outer wall of the object to be detected.

7. The detection device according to claim 1, characterized in that: The detection module (232) includes a transmitter (233) and a receiver (234); The support seat (231) comprises a first bracket and a second bracket, the first bracket and the second bracket are both fixed on the mounting frame (21), the transmitter (233) is fixed on the first bracket, the receiver (234) is fixed on the second bracket, and the transmitter (233) and the receiver (234) are both located above the bearing position (211).

8. The detection device according to claim 1, characterized in that: The detection device (20) further comprises a positioning mechanism (26), wherein the positioning mechanism (26) is fixed on the mounting frame (21), and the positioning mechanism (26) is used to limit the position of the object to be detected on the bearing position (211).

9. A method for detecting air tightness, characterized in that: The method is applied to the detection device (20) according to any one of claims 1 to 8, and the method comprises: After the object to be detected flows to the carrying position (211) on the mounting frame (21), the second port (226) of the connecting pipeline (223) is controlled to be connected to the opening of the air hole on the object to be detected; Controlling the pressurizing module (221) to pressurize along the connecting pipeline (223) to a first preset pressure, wherein the first preset pressure is greater than or equal to 200 KPa and less than or equal to 1000 KPa, and the air pressure of the first preset pressure can open the air hole; Acquiring a first deformation parameter of the object to be detected, wherein the first deformation parameter is obtained by a detection mechanism (23) detecting an outer wall of the object to be detected under the first preset pressure; If it is determined based on the first deformation parameter that the outer wall of the object to be detected is deformed, it is confirmed that the air tightness of the object to be detected is unqualified.

10. The method according to claim 9, characterized in that After obtaining the first deformation parameter of the object to be detected, the method further includes: If it is determined based on the first deformation parameter that the outer wall of the object to be detected has not been deformed, determining a first pressure drop value of the first preset pressure within a first preset time period; If the first pressure drop value is less than a first reference value, it is confirmed that the air tightness of the object to be detected is qualified.

11. The method according to claim 9, characterized in that The first preset pressure is greater than or equal to 600 KPa and less than or equal to 1000 KPa, and controlling the pressurizing module (221) to pressurize along the connecting pipeline (223) to the first preset pressure comprises: Controlling the pressurizing module (221) to pressurize along the connecting pipeline (223) to a second preset pressure, wherein the second preset pressure is greater than or equal to 200 KPa and less than 400 KPa; Determine a second pressure drop value of the second preset pressure within a second preset time period; If the second pressure drop value is less than a second reference value, the pressurizing module (221) is controlled to continue pressurizing along the connecting pipeline (223) to a third preset pressure, wherein the third preset pressure is greater than or equal to 400 KPa and less than 600 KPa; Determining a third pressure drop value of the third preset pressure within a third preset time period; If the third pressure drop value is less than a third reference value, the pressurizing module (221) is controlled to continue pressurizing along the connecting pipeline (223) to the first preset pressure.

12. The method according to any one of claims 9 to 11, characterized in that: Before the pressure-pressing module (221) is controlled to pressurize along the connecting pipeline (223) to a first preset pressure, the method further comprises: Controlling the vacuum module (222) to vacuum along the connecting pipeline (223) to a fourth preset pressure; Determining a fourth pressure drop value of the fourth preset pressure within a fourth preset time period; If the fourth pressure drop value is less than a fourth reference value, it is confirmed that the second port (226) is sealed and connected to the orifice of the air hole.

13. The method according to claim 9, characterized in that Before the second port (226) of the control connection pipeline (223) is connected to the opening of the air hole on the object to be detected, the method further comprises: The positioning mechanism (26) is controlled to clamp the object to be detected on the carrying position (211).

14. The method according to claim 9, characterized in that Before the second port (226) of the control connection pipeline (223) is covered on the welded sealing pin (134), the method further comprises: Acquiring image information of the object to be detected; It is determined according to the image information that the air-injection hole of the object to be detected is in a blocked state.

Images