Online double-track helium mass spectrum detection mechanism

Abstract

The invention discloses the technical field of power battery production, and particularly discloses an online double-track helium mass spectrometry detection mechanism which comprises a conveying mechanism, an upper sealing mechanism, a lower sealing mechanism and a cleaning mechanism, and the conveying mechanism comprises two conveying lines arranged in the transverse direction; the cleaning mechanism comprises a cleaning disc arranged on one longitudinal side of one conveying line, cleaning agent storage grooves formed in the two longitudinal sides of the cleaning disc respectively, a wiping groove and a plurality of air knives arranged on the cleaning disc on the two longitudinal sides of the wiping groove respectively. According to the helium mass spectrometer leak detection device, the material carrying tray loaded with the battery cover plates can be conveyed between the upper sealing pressure head and the lower sealing pressure head through the two conveying lines, online helium mass spectrometer leak detection is achieved under the cooperation of the upper sealing pressure head and the lower sealing pressure head, and in addition, the upper sealing pressure head can automatically move to the cleaning disc for automatic cleaning after detecting the multiple battery cover plates; therefore, air tightness detection failure caused by adhesion of aluminum powder to the upper sealing pressure head is avoided.

Description

Technical Field

[0001] This invention relates to the field of power battery production technology, and in particular to an online dual-track helium mass spectrometry detection mechanism. Background Technology

[0002] In battery production, helium mass spectrometry leak detection is required at the positive terminal, explosion-proof valve, and negative terminal positions of the battery cover to ensure the battery's sealing performance and to ensure that the produced batteries meet the required sealing performance.

[0003] The existing helium mass spectrometry leak detection method for battery covers has the following drawbacks:

[0004] First, in traditional helium mass spectrometry testing equipment, after the upper sealing head and lower sealing head have been used to test a certain number of battery covers, aluminum powder often adheres to the bottom sealing ring. If this aluminum powder is not cleaned regularly, it will lead to failure of the airtightness test.

[0005] Secondly, traditional testing methods involve manufacturing the battery cover plates first, and then placing them one by one into a helium mass spectrometer for testing. This method increases the number of times the battery cover plates are handled, making it difficult to achieve online testing and failing to improve work efficiency.

[0006] To address this issue, this application discloses an online dual-track helium mass spectrometry detection mechanism. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention discloses an online dual-track helium mass spectrometry detection mechanism.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is: an online dual-track helium mass spectrometry detection mechanism, comprising:

[0009] A conveying mechanism comprising two conveying lines arranged in a transverse direction;

[0010] The upper sealing mechanism includes a translation slide table mounted above two conveyor lines and driven to move along the longitudinal direction by a translation drive unit, an upper lifting platform mounted below the translation slide table and driven to rise and fall by a first lifting drive unit, an upper sealing pressure head mounted at the bottom of the upper lifting platform, and a vacuum tube mounted on the upper lifting platform and connected to the upper sealing pressure head.

[0011] The lower sealing mechanism includes a first lower lifting platform located between two conveyor lines and driven to rise and fall by a second lifting drive unit, a second lower lifting platform located above the first lower lifting platform, a lower sealing head located above the second lower lifting platform and cooperating with the upper sealing head, a helium nozzle on the lower sealing head, a helium discharge port, and a helium mass spectrometer located below the first lower lifting platform and connected to the lower sealing head.

[0012] The cleaning mechanism includes a cleaning tray located on one longitudinal side of one of the conveyor lines, a cleaning agent storage tank located on both longitudinal sides of the cleaning tray, a wiping tank, and multiple air knives located on both longitudinal sides of the wiping tank on the cleaning tray.

[0013] In a preferred embodiment, the translation drive unit includes two supports disposed on both sides of the longitudinal direction of the two conveyor lines, two sliding bases disposed on the top of the two supports respectively along the longitudinal direction, linear guide rails disposed on opposite sides of the two sliding bases respectively along the longitudinal direction, and a servo translation drive module disposed on one of the sliding bases.

[0014] The bottom of the longitudinal sides of the translation slide is provided with sliders that slide in contact with two linear guide rails, and the translation slide is connected to the drive unit of the servo translation drive module.

[0015] In a preferred embodiment, the first lifting drive unit includes two first cylinders respectively disposed above the lateral sides of the translation slide and whose piston rods pass through the upper translation slide and are connected to the upper lifting platform.

[0016] In a preferred embodiment, first guide sleeves are respectively provided inside the transverse sides of the translation slide, and first guide posts are respectively provided above the transverse sides of the lifting platform, passing through the first guide sleeves.

[0017] In a preferred embodiment, the translation slide has a slot for the vacuum tube to pass through upwards, and a vacuum valve is connected to the vacuum tube.

[0018] In a preferred embodiment, the second lifting drive unit includes a second cylinder disposed at the bottom of the first lower lifting platform and having its piston rod connected to the first lower lifting platform.

[0019] In a preferred embodiment, a guide platform fixed to the two conveyor lines is provided above the first lower lifting platform. Second guide sleeves are respectively provided inside the horizontal sides of the guide platform. Second guide posts are respectively provided above the horizontal sides of the first lower lifting platform, passing through the two second guide sleeves and connecting to the second lower lifting platform.

[0020] In a preferred embodiment, a first silicone sealing ring is provided at the bottom of the upper sealing head, and a second silicone sealing ring is provided on the outer ring of the lower sealing head.

[0021] In a preferred embodiment, a fixing groove is provided above the support along the lateral direction, and the cleaning tray is installed inside the fixing groove.

[0022] In a preferred embodiment, the interior of the cleaning agent storage tank and the wiping tank are respectively provided with sponges.

[0023] The present invention achieves the following beneficial effects:

[0024] This application uses two conveyor lines to transport the material tray containing the battery cover to between the upper and lower sealing heads, and achieves online helium mass spectrometry leak detection with the cooperation of the upper and lower sealing heads. In addition, after the upper sealing head detects multiple battery covers, it can automatically move to the cleaning tray for automatic cleaning. In this way, the upper sealing head will not fail the airtightness test due to aluminum powder adhesion.

[0025] Other features and advantages of the invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the disclosure of this invention and, together with the description, serve to explain the principles of this disclosure.

[0027] Figure 1 This is a schematic diagram of the overall structure disclosed in this invention;

[0028] Figure 2 This is a schematic diagram of the conveying mechanism structure disclosed in this invention;

[0029] Figure 3 This is a schematic diagram of the upper sealing mechanism structure disclosed in this invention;

[0030] Figure 4 This is a schematic diagram of the bottom of the upper sealing mechanism disclosed in this invention;

[0031] Figure 5 This is a schematic diagram of the lower sealing mechanism structure disclosed in this invention;

[0032] Figure 6 This is a schematic diagram of the cleaning mechanism structure disclosed in this invention;

[0033] In the diagram: 10. Conveying mechanism; 11. Conveying line;

[0034] 20. Upper sealing mechanism; 21. Translation drive unit; 211. Support; 212. Sliding base; 213. Linear guide rail; 214. Servo translation drive module; 22. Translation slide; 221. Slider; 222. First guide sleeve; 23. First lifting drive unit; 231. First cylinder; 24. Upper lifting platform; 24. First guide post; 25. Upper sealing pressure head; 251. First silicone sealing ring; 26. Vacuum tube; 261. Vacuum valve;

[0035] 30. Lower sealing mechanism; 31. Second lifting drive unit; 311. Second cylinder; 32. First lower lifting platform; 321. Second guide column; 33. Second lower lifting platform; 34. Lower sealing head; 341. Helium nozzle; 342. Helium discharge port; 343. Second silicone sealing ring; 35. Helium mass spectrometer; 36. Guide platform; 361. Second guide sleeve;

[0036] 40. Cleaning mechanism; 41. Cleaning tray; 411. Cleaning agent storage tank; 412. Wiping tank; 413. Air knife;

[0037] d. Material tray. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0040] Example

[0041] To address the issue that existing helium mass spectrometry leak detection equipment for battery covers cannot perform online testing, increasing the number of times the battery cover needs to be handled and thus reducing work efficiency, and that after testing a certain number of battery covers, the sealing head 25 of the helium mass spectrometry detection device, in conjunction with the sealing head 34 of the helium mass spectrometry detection device, often accumulates aluminum powder on its bottom sealing ring, which can lead to airtightness test failure if this aluminum powder is not cleaned regularly, reference should be made to… Figures 1-6 As shown, this application discloses an online dual-track helium mass spectrometry detection mechanism, including a delivery mechanism 10, an upper sealing mechanism 20, a lower sealing mechanism 30, and a cleaning mechanism 40;

[0042] The conveying mechanism 10 includes two conveying lines 11 arranged in the transverse direction; used to move a material tray d (the material tray d is used to hold the battery cover plate produced on the production line);

[0043] The upper sealing mechanism 20 includes a translation slide 22 mounted above two conveyor lines 11 and driven to move along the longitudinal direction by a translation drive unit 21, an upper lifting platform 24 located below the translation slide 22 and driven to rise and fall by a first lifting drive unit 23, an upper sealing pressure head 25 located at the bottom of the upper lifting platform 24, and a vacuum tube 26 located on the upper lifting platform 24 and connected to the upper sealing pressure head 25. In specific implementation, the translation drive unit 21 can drive the upper lifting platform 24 to move back and forth between the lower sealing mechanism 30 and the cleaning mechanism 40. Under the drive of the first lifting drive unit 23, the upper sealing pressure head 25 can descend and cooperate with the lower sealing mechanism 30 to seal and press the battery cover. Under the drive of the first lifting drive unit 23, the upper sealing pressure head 25 can descend into the cleaning mechanism 40 for automatic cleaning.

[0044] The lower sealing mechanism 30 includes a first lower lifting platform 32 located between two conveyor lines 11 and driven to rise and fall by a second lifting drive unit 31; a second lower lifting platform 33 located above the first lower lifting platform 32; a lower sealing head 34 located above the second lower lifting platform 33 and cooperating with the upper sealing head 25; a helium nozzle 341 and a helium discharge port 342 opened on the lower sealing head 34; and a helium mass spectrometer 35 located below the first lower lifting platform 32 and connected to the lower sealing head 34. In specific implementation, the second lifting drive unit 31 needs to first drive the first lower lifting platform 32 and the second lower lifting platform 33 to lift until the lower sealing head 34 is lifted from the bottom of the material tray d. The upper sealing head 25 is lowered to press against the battery cover plate inside the material tray d. Then, the first lifting drive unit 23 drives the upper sealing head 25 to press against the battery cover plate inside the material tray d from above. With the cooperation of the upper sealing head 25 and the lower sealing head 34, a sealed cavity can be formed. During the helium mass spectrometry leak detection process, the upper sealing head 25 is first evacuated, and the helium nozzle 341 of the lower sealing head 34 is then injected with a set amount of helium. The helium mass spectrometer 35 is used to analyze whether there is any leakage. In this way, the sealing performance of the battery cover plate can be detected. After the entire helium mass spectrometry detection work is completed, the helium emission port 342 needs to discharge the helium for subsequent helium mass spectrometry leak detection of other battery covers.

[0045] The cleaning mechanism 40 includes a cleaning tray 41 located on one longitudinal side of one of the conveyor lines 11, a cleaning agent storage tank 411 and a wiping tank 412 respectively opened on both longitudinal sides of the cleaning tray 41, and multiple air knives 413 respectively opened on the cleaning tray 41 on both longitudinal sides of the wiping tank 412. After the upper sealing head 25 and the lower sealing head 34 cooperate to perform helium mass spectrometry leak detection on multiple battery covers, the translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing head 25 is positioned above one of the air knives 413 on the cleaning tray 41, and blows away the aluminum powder adhering to its bottom through the air knife 413. Then, the translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing head 25 is positioned above one of the air knives 413 on the cleaning tray 41, and blows away the aluminum powder adhering to its bottom through the air knife 413. Then, the translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing head 25 is positioned above one of the air knives 413 on the cleaning tray 41. Positioned above the cleaning agent storage tank 411 of the cleaning tray 41, the first lifting drive unit 23 drives the upper sealing pressure head 25 to descend into the cleaning agent storage tank 411 for cleaning with cleaning agent. After that, the translation drive unit 21 moves the upper lifting platform 24 so that the upper sealing pressure head 25 is positioned above an air knife 413 of the cleaning tray 41 and the air knife 413 blows away the excess cleaning agent at the bottom. Finally, the translation drive unit 21 moves the upper lifting platform 24 so that the upper sealing pressure head 25 is positioned above the wiping groove 412 of the cleaning tray 41. After that, the first lifting drive unit 23 drives the upper sealing pressure head 25 to descend into the wiping groove 412 for wiping.

[0046] It should be noted that the present application has multiple upper sealing pressure head 25, lower sealing pressure head 34, cleaning agent storage tank 411, wiping tank 412, and helium mass spectrometer 35, and the material tray d has multiple slots (not shown) for placing the battery cover plate.

[0047] Based on the above structure, the general workflow of the online dual-track helium mass spectrometry detection mechanism provided in this application is as follows:

[0048] Step 1: The two conveyor lines 11 drive the material tray d to the set position;

[0049] In the second step, the second lifting drive unit 31 drives the first lower lifting platform 32 and the second lower lifting platform 33 to lift up until the lower sealing head 34 presses against the battery cover plate inside the material tray d from the bottom of the material tray d.

[0050] The third step is to drive the upper lifting platform 24 to move above the material tray d by the translation drive unit 21 and drive the upper sealing head 25 to descend and press the battery cover plate inside the material tray d from above.

[0051] The fourth step involves first evacuating the upper sealing head 25, then injecting a set amount of helium gas into the helium nozzle 341 of the lower sealing head 34, and analyzing the gas through the helium mass spectrometer 35 to determine if any leakage has occurred.

[0052] Fifth, helium gas needs to be discharged through helium vent 342;

[0053] The sixth step is to move the upper lifting platform 24 with the translation drive unit 21 so that the upper sealing pressure head 25 is first positioned above a wind knife 413 to blow away aluminum powder.

[0054] Step 7: The translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing head 25 is above the cleaning agent storage tank 411 of the cleaning tray 41. After it is in place, the first lifting drive unit 23 drives the upper sealing head 25 to descend into the cleaning agent storage tank 411 for cleaning with cleaning agent.

[0055] Step 8: The translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing pressure head 25 is positioned above a wind knife 413 of the cleaning plate 41 and the excess cleaning agent at the bottom is blown away by the wind knife 413.

[0056] In the ninth step, the translation drive unit 21 drives the upper lifting platform 24 to move so that the upper sealing pressure head 25 is positioned above the wiping groove 412 of the cleaning tray 41. After it is in position, the first lifting drive unit 23 drives the upper sealing pressure head 25 to descend into the wiping groove 412 for wiping.

[0057] In this embodiment, the translation drive unit 21 of this application includes two supports 211 disposed on both sides of the longitudinal direction of the two conveyor lines 11, two sliding bases 212 disposed on the top of the two supports 211 respectively along the longitudinal direction, linear guide rails 213 disposed on opposite sides of the two sliding bases 212 respectively along the longitudinal direction, and a servo translation drive module 214 disposed on one of the sliding bases.

[0058] The bottom of the longitudinal sides of the translation slide 22 is provided with sliders 221 that are slidably connected to two linear guide rails 213, and the translation slide 22 is connected to the drive unit of the servo translation drive module 214.

[0059] In practice, the servo translation drive module 214 can drive the translation platform to move on the two linear guide rails 213, thereby causing the upper sealing head 25 to move back and forth between the cleaning disc 41 and the lower sealing mechanism 30.

[0060] In this embodiment, the first lifting drive unit 23 includes two first cylinders 231 respectively located above the horizontal sides of the translation slide 22 and whose piston rods pass through the upper translation slide 22 and are connected to the upper lifting platform 24. Before inspecting the battery cover, the two first cylinders 231 drive the upper lifting platform 24 to descend. When cleaning the upper sealing head 25, the two first cylinders 231 drive the upper lifting platform 24 to descend so that the upper sealing head 25 is located in the cleaning agent storage tank 411 or the wiping tank 412, where it is cleaned with cleaning agent and wiped dry with cleaning agent in the wiping tank 412.

[0061] In order to ensure that the upper lifting platform 24 can perform smooth lifting and lowering movements, the present application provides first guide sleeves 222 inside the transverse sides of the translation slide 22, and first guide posts 24 above the transverse sides of the upper lifting platform 24 passing through the first guide sleeves 222. When the two first cylinders 231 drive the upper lifting platform 24 to lift and lower, the two first guide posts 24 will move in the two second guide sleeves 361.

[0062] Furthermore, this application has a slot on the translation slide 22 for the vacuum tube 26 to pass through upwards, and a vacuum valve 261 is connected to the vacuum tube 26. It should be emphasized that the vacuum tube 26 of this application needs to be connected to an external vacuum pump (not shown in this application). When the vacuum valve 261 is open, the vacuum pump can perform vacuuming through the vacuum tube 26.

[0063] In this embodiment, the second lifting drive unit 31 includes a second cylinder 311 disposed at the bottom of the first lower lifting platform 32 and having its piston rod connected to the first lower lifting platform 32;

[0064] Furthermore, a guide platform 36 is provided above the first lower lifting platform 32 and fixed to the two conveyor lines 11. The guide platform 36 has a second guide sleeve 361 inside its horizontal sides. The first lower lifting platform 32 has a second guide post 321 above its horizontal sides, which passes through the two second guide sleeves 361 and connects to the second lower lifting platform 33. Driven by the second cylinder 311, the first lower lifting platform 32 and the second lower lifting platform 33 can achieve lifting and lowering movements. During this process, the two second guide posts 321 will move between the two second guide sleeves 361, which can ensure the stability of the first lower lifting platform 32 and the second lower lifting platform 33.

[0065] To ensure a seal on the battery cover, this application provides a first silicone sealing ring 251 at the bottom of the upper sealing head 25 and a second silicone sealing ring 343 on the outer ring of the lower sealing head 34. When the upper sealing head 25 presses against the battery cover, the first silicone sealing ring 251 seals the battery cover from above. When the lower sealing head 34 presses against the battery cover, the second silicone sealing ring 343 seals the battery cover from below. When cleaning the upper sealing head 25, the primary function is to clean the first silicone sealing ring 251 at the bottom of the upper sealing head 25.

[0066] To facilitate the installation of the cleaning tray 41, this application provides a fixing groove (not shown) above the support 211 along the horizontal direction. The cleaning tray 41 is installed inside the fixing groove. This installation method can reduce the space occupied by the entire device and has a better performance.

[0067] In this embodiment, sponges (not shown) are respectively provided inside the cleaning agent storage tank 411 and the wiping tank 412. In specific implementation, the sponge in the cleaning agent storage tank 411 absorbs the cleaning agent and is used to clean the upper sealing head 25, while the sponge in the wiping tank 412 is used to dry the upper sealing head 25.

[0068] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An online dual-track helium mass spectrometry detection mechanism, characterized in that, include: A conveying mechanism comprising two conveying lines arranged in a transverse direction; The upper sealing mechanism includes a translation slide table mounted above two conveyor lines and driven to move along the longitudinal direction by a translation drive unit, an upper lifting platform mounted below the translation slide table and driven to rise and fall by a first lifting drive unit, an upper sealing pressure head mounted at the bottom of the upper lifting platform, and a vacuum tube mounted on the upper lifting platform and connected to the upper sealing pressure head. The lower sealing mechanism includes a first lower lifting platform located between two conveyor lines and driven to rise and fall by a second lifting drive unit, a second lower lifting platform located above the first lower lifting platform, a lower sealing head located above the second lower lifting platform and cooperating with the upper sealing head, a helium nozzle on the lower sealing head, a helium discharge port, and a helium mass spectrometer located below the first lower lifting platform and connected to the lower sealing head. The cleaning mechanism includes a cleaning tray located on one longitudinal side of one of the conveyor lines, a cleaning agent storage tank located on both longitudinal sides of the cleaning tray, a wiping tank, and multiple air knives located on both longitudinal sides of the wiping tank on the cleaning tray.

2. The online dual-track helium mass spectrometry detection mechanism according to claim 1, characterized in that, The translation drive unit includes two supports on both sides of the longitudinal direction of the two conveyor lines, two sliding bases respectively set on the top of the two supports along the longitudinal direction, linear guide rails respectively set on opposite sides of the two sliding bases along the longitudinal direction, and a servo translation drive module set on one of the sliding bases. The bottom of the longitudinal sides of the translation slide is provided with sliders that slide in contact with two linear guide rails, and the translation slide is connected to the drive unit of the servo translation drive module.

3. The online dual-track helium mass spectrometry detection mechanism according to claim 1, characterized in that, The first lifting drive unit includes two first cylinders respectively located above the horizontal sides of the translation slide and whose piston rods pass through the upper translation slide and are connected to the upper lifting platform.

4. The online dual-track helium mass spectrometry detection mechanism according to claim 3, characterized in that, The translation slide is provided with first guide sleeves on both sides of the horizontal axis, and first guide posts are provided above the upper sides of the upper lifting platform, passing through the first guide sleeves.

5. The online dual-track helium mass spectrometry detection mechanism according to claim 3, characterized in that, The translation slide has a slot for the vacuum tube to pass through upwards, and a vacuum valve is connected to the vacuum tube.

6. The online dual-track helium mass spectrometry detection mechanism according to claim 1, characterized in that, The second lifting drive unit includes a second cylinder located at the bottom of the first lower lifting platform and whose piston rod is connected to the first lower lifting platform.

7. The online dual-track helium mass spectrometry detection mechanism according to claim 1, characterized in that, A guide platform is provided above the first lower lifting platform and fixed to the two conveyor lines. A second guide sleeve is provided inside the horizontal sides of the guide platform. A second guide post is provided above the horizontal sides of the first lower lifting platform and passes through the two second guide sleeves to connect with the second lower lifting platform.

8. The online dual-track helium mass spectrometry detection mechanism according to claim 1, characterized in that, The bottom of the upper sealing head is provided with a first silicone sealing ring, and the outer ring of the lower sealing head is provided with a second silicone sealing ring.

9. The online dual-track helium mass spectrometry detection mechanism according to claim 2, characterized in that, A fixing groove is provided above the support along the horizontal direction, and the cleaning tray is installed inside the fixing groove.

10. An online dual-track helium mass spectrometry detection mechanism according to claim 9, characterized in that, The cleaning agent storage tank and the wiping tank are each equipped with a sponge.

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