CN110954275B - A lithium battery sealing cover sealing detection device and detection method - Google Patents
A lithium battery sealing cover sealing detection device and detection method Download PDFInfo
- Publication number
- CN110954275B CN110954275B CN201911086206.XA CN201911086206A CN110954275B CN 110954275 B CN110954275 B CN 110954275B CN 201911086206 A CN201911086206 A CN 201911086206A CN 110954275 B CN110954275 B CN 110954275B
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- detection channel
- vacuum box
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 70
- 238000001514 detection method Methods 0.000 title claims abstract description 65
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000003825 pressing Methods 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 9
- 239000001307 helium Substances 0.000 claims description 7
- 229910052734 helium Inorganic materials 0.000 claims description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
本发明实施例公开了一种锂电池密封盖密封性检测装置，包括真空箱、密封压板、移动机构、真空泵、气体供给机构和检漏仪；所述真空箱内设置有工件放置区，所述密封压板设置在所述真空箱内，所述密封压板与所述移动机构连接，所述移动机构可带动所述密封压板向所述工件放置区移动；所述密封压板设置有检漏通道以及与所述检漏通道连通的通道出口；所述真空泵、所述气体供给机构和所述检漏仪连通至所述检漏通道；所述气体供给机构可向所述检漏通道通入标识气体。本发明的一种锂电池密封盖密封性检测装置结构简单，操作方便，检测效率高。
The embodiment of the present invention discloses a lithium battery sealing cover sealing detection device, including a vacuum box, a sealing plate, a moving mechanism, a vacuum pump, a gas supply mechanism and a leak detector; a workpiece placement area is provided in the vacuum box, the sealing plate is provided in the vacuum box, the sealing plate is connected to the moving mechanism, and the moving mechanism can drive the sealing plate to move toward the workpiece placement area; the sealing plate is provided with a leak detection channel and a channel outlet connected to the leak detection channel; the vacuum pump, the gas supply mechanism and the leak detector are connected to the leak detection channel; the gas supply mechanism can introduce a marking gas into the leak detection channel. The lithium battery sealing cover sealing detection device of the present invention has a simple structure, convenient operation and high detection efficiency.
Description
Technical Field
The invention relates to a device and a method for detecting tightness of a sealing cover of a lithium battery.
Background
A lithium battery is a primary battery using a nonaqueous electrolyte solution with lithium metal or lithium alloy as a negative electrode material, unlike a rechargeable battery lithium ion battery and a lithium ion polymer battery. The chemical characteristics of lithium metal are very active, so that the processing, storage and use of lithium metal have very high requirements on environment. The lithium battery comprises a sealing cover and a shell, and the sealing performance of the sealing cover of the lithium battery is poor, so that the lithium battery is easy to air-bulge, and the explosion risk of the lithium battery is increased. No special device for detecting the tightness of the sealing cover exists in the prior art.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the embodiment of the invention discloses a device for detecting the tightness of a sealing cover of a lithium battery, which comprises a vacuum box, a sealing pressing plate, a moving mechanism, a vacuum pump, a gas supply mechanism and a leak detector; the vacuum box is internally provided with a workpiece placing area, the sealing pressing plate is arranged in the vacuum box and connected with the moving mechanism, and the moving mechanism can drive the sealing pressing plate to move towards the workpiece placing area; the sealing pressing plate is provided with a leakage detection channel and a plurality of channel outlets communicated with the leakage detection channel, the channel outlets are arranged at the bottom of the sealing pressing plate, and the inlet of the leakage detection channel is arranged at the side surface of the sealing pressing plate; the vacuum pump, the gas supply mechanism and the leak detector are communicated to an inlet of the leak detection channel; the gas supply mechanism can be used for introducing identification gas into the leak detection channel; the positioning seat is arranged in the workpiece placing area, and a plurality of parallel positioning grooves are formed in the positioning seat for placing a plurality of workpieces.
As a further improvement of the embodiment of the invention, the moving mechanism comprises a driving cylinder, and a piston rod of the driving cylinder is fixed with the sealing pressing plate so as to drive the sealing pressing plate to approach or separate from the workpiece placing area.
As a further improvement of the embodiment of the invention, the moving mechanism further comprises a guide mounting plate and a guide post, wherein the guide mounting plate is fixed with the end part of the piston rod of the driving cylinder, the guide post is arranged beside the workpiece placing area, and the guide post penetrates through the guide mounting plate; the sealing pressing plate is fixed with the guide mounting plate.
As a further improvement of the embodiment of the present invention, the identification gas is helium.
As a further improvement of the embodiment of the invention, the vacuum pump is communicated with the vacuum box and can vacuumize the vacuum box.
The tightness detection device for the lithium battery sealing cover is simple in structure, convenient to operate and high in detection efficiency.
The embodiment of the application also discloses a method for detecting the tightness of the sealing cover of the lithium battery, which adopts the device for detecting the tightness of the sealing cover of the lithium battery according to any one of the embodiments of the application, and comprises the following steps:
s1) placing a workpiece in a vacuum box;
S2) the moving mechanism drives the sealing pressing plate to press the workpiece, and the channel outlet pressure of the leak detection channel of the sealing pressing plate
Tightly adhering to the surface of the workpiece;
s3) vacuumizing the leak detection channel by a vacuum pump until the set vacuum degree is reached;
S4) the gas supply mechanism fills the identification gas into the leak detection channel until the gas pressure in the leak detection channel reaches the set value
Setting a value;
s5) taking out the workpiece and purifying the surface of the workpiece;
s6) placing the workpiece into a vacuum box, compacting the workpiece according to the step S2, vacuumizing the vacuum box and the leak detection channel, and detecting the leak detection channel by the leak detector.
As a further improvement of the embodiment of the invention, the moving mechanism is a driving air cylinder, and a piston rod of the driving air cylinder is fixed with the sealing pressing plate.
As a further improvement of the embodiment of the invention, a positioning seat for placing the workpiece is arranged in the vacuum box.
The detection method disclosed by the embodiment of the invention has the advantages of simple steps and high detection efficiency.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Referring to fig. 1, the embodiment of the invention discloses a device for detecting tightness of a sealing cover of a lithium battery, which comprises a vacuum box 100, a sealing pressing plate 200, a moving mechanism, a vacuum pump 400, a gas supply mechanism 500, a leak detector 600 and a positioning seat 110; a workpiece 700 placement area is arranged in the vacuum box 100, the sealing pressing plate 200 is connected with the moving mechanism, and the moving mechanism can drive the sealing pressing plate 200 to move towards the workpiece 700 placement area; the sealing pressing plate 200 is provided with a leakage detection channel 210 and a channel outlet 220 communicated with the leakage detection channel 210; the vacuum pump 400, the gas supply mechanism 500, and the leak detector 600 communicate to the leak detection channel 210. The workpiece 700 is vacuumized and filled with the identification gas through the leak detection channel 210, the identification gas is removed from the surface of the workpiece 700, then the workpiece 700 is placed into the vacuum box 100, the concentration of the identification gas in the leak detection channel 210 is detected through the leak detector 600, and therefore whether the workpiece 700 leaks gas or not is judged, and the leak detection process is rapid and simple and has low labor intensity.
The vacuum box 100 is provided with a cover body, and the work 700 is put in or taken out by opening and closing the cover body.
In this embodiment, the moving mechanism is fixed in the vacuum box 100 by a bracket. In other embodiments, the moving mechanism may be partially disposed outside the vacuum box 100, and the sealing platen 200 is driven to move only by the connecting rod penetrating into the vacuum box 100.
In this embodiment, the moving mechanism includes a driving cylinder 310, a guiding mounting plate 320, and a guiding column 330, where a piston rod of the driving cylinder 310 is fixed to the sealing platen 200, so as to drive the sealing platen 200 to approach or separate from the placing area of the workpiece 700. The guide mounting plate 320 is fixed to the end of the piston rod of the driving cylinder 310, the guide post 330 is disposed beside the placement area of the workpiece 700, and the guide post 330 passes through the guide mounting plate 320; the seal platen 200 is fixed to the guide mounting plate 320. In this embodiment, the placement area of the workpiece 700 is disposed at the bottom surface of the vacuum box 100, the guide columns 330 are perpendicular to the placement area of the workpiece 700, the driving air cylinders 310 are located above the placement area of the workpiece 700, the four corners of the guide mounting plate 320 are all provided with through holes, the four guide columns 330 respectively penetrate through the four through holes of the guide mounting plate 320, the end parts of the piston rods of the driving air cylinders 310 are fixed with the guide mounting plate 320, and the bottoms of the guide mounting plate 320 are fixed with the sealing pressing plate 200. In other embodiments, the moving mechanism can be replaced by an oil cylinder, a motor, a worm gear and worm drive mode and the like.
In this embodiment, the plurality of channel outlets 220 of the sealing platen 200 are provided at the bottom, the inlets of the leak detection channels 210 are provided at the sides of the sealing platen 200, and the inlets of the leak detection channels 210 are connected to the vacuum pump 400, the gas supply mechanism 500, and the leak detector 600 through pipes. In this embodiment, the identification gas is helium, and in other embodiments, the identification gas may be other inert gases.
In this embodiment, the vacuum pump 400 is connected to the vacuum box 100 and can vacuum the vacuum box 100. In addition, the vacuum pump 400 may also evacuate the leak detection channel 210 without the sealing platen 200 pressing against the workpiece 700, thereby evacuating the vacuum chamber 100.
In this embodiment, the positioning seat 110 is disposed in the placement area of the workpiece 700, and the positioning seat 110 is provided with a positioning groove 111 for placing the workpiece 700. The plurality of positioning grooves 111 are arranged in parallel so that the plurality of work pieces 700 are placed in parallel with each other in the work piece 700 placement area.
The tightness detection device for the lithium battery sealing cover is simple in structure, convenient to operate and high in detection efficiency.
The invention also discloses a method for detecting the tightness of the sealing cover of the lithium battery, which is used according to the detection device and comprises the following steps: s1) placing the workpiece 700 in the vacuum box 100; s2) the moving mechanism drives the sealing pressing plate 200 to press the workpiece 700, and the channel outlet 220 of the leak detection channel 210 of the sealing pressing plate 200 is pressed on the surface of the workpiece 700; s3) the vacuum pump 400 vacuumizes the leak detection channel 210 until reaching the set vacuum degree; s4) the gas supply mechanism 500 fills the identification gas into the leak detection channel 210 until the gas pressure in the leak detection channel 210 reaches a set value; s5) taking out the workpiece 700 and purifying the surface of the workpiece 700; s6) placing the workpiece 700 into the vacuum box 100 and pressing the workpiece 700 in accordance with step S2, and evacuating the vacuum box 100 and the leak detection channel 210, the leak detector 600 detects the leak detection channel 210.
In this embodiment, in the above detection method, the moving mechanism is a driving cylinder 310, a piston rod of the driving cylinder 310 is fixed to the sealing platen 200, and a positioning seat 110 for placing the workpiece 700 is disposed in the vacuum box 100.
When detecting the workpiece 700, the workpiece 700 is firstly mounted on the positioning seat 110, then the vacuum box 100 is closed, the piston rod of the driving cylinder 310 extends out, so that the guiding mounting plate 320 drives the sealing pressing plate 200 to move downwards, and the channel outlet 220 of the sealing pressing plate 200 is clamped on the top surface of the sealing cover workpiece 700, so that the positioning and clamping of the workpiece 700 are completed. The vacuum pump 400 then evacuates the vacuum box 100 and leak detection channel 210 until a specified vacuum level is reached. Then, the gas supply mechanism 500 charges the leak detection passage 210 with high-pressure helium gas, and after a certain period of time, the piston rod of the driving cylinder 310 is retracted, and then the vacuum box 100 is opened to take out the workpiece 700. After the workpiece 700 is purified, the workpiece 700 enters a leak detection step, the workpiece 700 is placed back into the vacuum box 100, the sealing pressing plate 200 is used for pressing the workpiece 700, the channel outlet 220 is pressed on the top surface of the workpiece 700, then the leak detection channel 210 and the vacuum box 100 are pumped, if a leak exists in the workpiece 700, the gas in the workpiece 700 can be forced to flow out by utilizing the pressure difference, then the leak detector 600 is used for detecting the helium concentration in the leak detection channel 210, and if the helium concentration detected by the leak detector 600 exceeds a set value, the leak exists in the workpiece 700.
The work 700 may be purged with dry nitrogen or the like, or helium adsorbed on the outer surface of the work 700 may be removed by a static means.
The positioning seat 110 can be provided with a plurality of workpieces 700, so that the detection device can detect the plurality of workpieces 700 at the same time, and the production efficiency is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention is not limited to the above-described embodiments, but, if various modifications or variations of the present invention are not departing from the spirit and scope of the present invention, the present invention is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.
Claims (7)
1. The utility model provides a sealed tightness detection device of lithium cell, its characterized in that: the device comprises a vacuum box, a sealing pressing plate, a moving mechanism, a vacuum pump, a gas supply mechanism and a leak detector; the vacuum box is internally provided with a workpiece placing area, the sealing pressing plate is arranged in the vacuum box and connected with the moving mechanism, and the moving mechanism can drive the sealing pressing plate to move towards the workpiece placing area; the vacuum pump is communicated with the vacuum box and can vacuumize the vacuum box; the sealing pressing plate is provided with a leakage detection channel and a plurality of channel outlets communicated with the leakage detection channel, the channel outlets are arranged at the bottom of the sealing pressing plate, and the inlet of the leakage detection channel is arranged at the side surface of the sealing pressing plate; the vacuum pump, the gas supply mechanism and the leak detector are communicated to an inlet of the leak detection channel; the gas supply mechanism can be used for introducing identification gas into the leak detection channel; the positioning seat is arranged in the workpiece placing area, and a plurality of parallel positioning grooves are formed in the positioning seat for placing a plurality of workpieces.
2. The sealing cover tightness detection device for lithium batteries according to claim 1, wherein: the moving mechanism comprises a driving air cylinder, and a piston rod of the driving air cylinder is fixed with the sealing pressing plate so as to drive the sealing pressing plate to approach or separate from the workpiece placing area.
3. The sealing cover tightness detection device for lithium batteries according to claim 2, wherein: the moving mechanism further comprises a guide mounting plate and a guide column, the guide mounting plate is fixed with the end part of a piston rod of the driving cylinder, the guide column is arranged beside the workpiece placing area, and the guide column penetrates through the guide mounting plate; the sealing pressing plate is fixed with the guide mounting plate.
4. The sealing cover tightness detection device for lithium batteries according to claim 1, wherein: the identification gas is helium.
5. A method for detecting tightness of a lithium battery sealing cover is characterized by comprising the following steps of: a lithium battery seal cap tightness detection device according to any one of claims 1 to 4, said method comprising the steps of:
s1) placing a workpiece in a vacuum box;
s2) the moving mechanism drives the sealing pressing plate to press the workpiece, and a channel outlet of a leak detection channel of the sealing pressing plate is pressed on the surface of the workpiece;
s3) vacuumizing the leak detection channel by a vacuum pump until the set vacuum degree is reached;
S4) the gas supply mechanism fills identification gas into the leak detection channel until the gas pressure in the leak detection channel reaches a set value;
s5) taking out the workpiece and purifying the surface of the workpiece;
s6) placing the workpiece into a vacuum box, compacting the workpiece according to the step S2, vacuumizing the vacuum box and the leak detection channel, and detecting the leak detection channel by the leak detector.
6. The method of claim 5, wherein: the moving mechanism is a driving air cylinder, and a piston rod of the driving air cylinder is fixed with the sealing pressing plate.
7. The method of claim 5, wherein: and a positioning seat for placing a workpiece is arranged in the vacuum box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911086206.XA CN110954275B (en) | 2019-11-08 | 2019-11-08 | A lithium battery sealing cover sealing detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086206.XA CN110954275B (en) | 2019-11-08 | 2019-11-08 | A lithium battery sealing cover sealing detection device and detection method |
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| CN110954275A CN110954275A (en) | 2020-04-03 |
| CN110954275B true CN110954275B (en) | 2024-11-26 |
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| CN112139062A (en) * | 2020-07-28 | 2020-12-29 | 安徽皖仪科技股份有限公司 | Automatic leakage detection equipment and method for cylindrical battery |
| CN111929006B (en) * | 2020-10-14 | 2021-01-05 | 江苏时代新能源科技有限公司 | Air tightness detection device and method thereof |
| CN112345163A (en) * | 2020-10-16 | 2021-02-09 | 天津七所高科技有限公司 | Device and method for detecting air leakage position of welding seam of lower cover of automobile battery box |
| CN112729711A (en) * | 2020-12-28 | 2021-04-30 | 南京三乐集团有限公司 | Device and method for detecting air tightness of vacuum electronic device |
| CN112629782B (en) * | 2020-12-30 | 2022-09-06 | 中国工程物理研究院激光聚变研究中心 | Self-sealing type vacuum detection system and vacuumizing leak detection method |
| CN113611925B (en) * | 2021-08-27 | 2022-12-27 | 广东嘉尚新能源科技有限公司 | Automatic fixed-distance conveying sealing performance detection device for soft-packaged lithium battery cells |
| CN113932986A (en) * | 2021-11-01 | 2022-01-14 | 广州新龙浩工业设备有限公司 | A vacuum leak detection device |
| CN114441110A (en) * | 2022-01-26 | 2022-05-06 | 苏州华工自动化技术有限公司 | A helium leak detection device for battery top cover and its working method |
| CN115265941B (en) * | 2022-09-22 | 2023-08-22 | 深圳市利和兴股份有限公司 | Soft package battery testing method, system and storage medium |
| CN115752934B (en) * | 2022-12-26 | 2025-12-16 | 广东水晶岛智能健康股份有限公司 | Cylinder body water-free detection device with single sealing structure and water-free detection method |
| CN116818226B (en) * | 2022-12-26 | 2026-04-14 | 广东水晶岛智能健康股份有限公司 | Water-free detection device and detection method for mobile swimming pool |
| CN115752935B (en) * | 2022-12-26 | 2025-10-14 | 广东水晶岛智能健康股份有限公司 | A water-free cylinder detection device and method with a double-sealed structure |
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