CN219416596U - Double-station helium detector for battery top cover plate - Google Patents
Double-station helium detector for battery top cover plate Download PDFInfo
- Publication number
- CN219416596U CN219416596U CN202320864256.1U CN202320864256U CN219416596U CN 219416596 U CN219416596 U CN 219416596U CN 202320864256 U CN202320864256 U CN 202320864256U CN 219416596 U CN219416596 U CN 219416596U
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- CN
- China
- Prior art keywords
- helium
- detecting
- top cover
- battery top
- cover plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000001307 helium Substances 0.000 title claims abstract description 185
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 185
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 238000001514 detection method Methods 0.000 claims abstract description 62
- 238000005507 spraying Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000001681 protective effect Effects 0.000 claims description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 235000004443 Ricinus communis Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- -1 helium ions Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a battery top cover plate double-station helium detector, which comprises: a body; the charging device is arranged on the machine body, the battery top cover plate is conveyed to the detection device through the charging device, and the battery top cover plate is conveyed out of the detection device through the charging device; the detecting device is arranged on the machine body, the detecting device is arranged right above the feeding device and comprises a lifting mechanism and a detecting component, the detecting component comprises a helium detecting upper die and a helium detecting lower die, the helium detecting upper die is connected with the lifting mechanism, the lifting mechanism drives the helium detecting upper die to ascend or descend, a placing cavity is arranged on the helium detecting lower die and is connected with the helium detecting instrument, a helium spraying cavity is arranged on the helium detecting upper die and is connected with the vacuum pump and the helium tank, and compressed air is injected into the helium spraying cavity for pressurization after the detecting device finishes spraying helium into the helium spraying cavity. The helium detector can achieve the purpose of detection under the condition of using less helium gas when detecting the top cover plate of the battery.
Description
Technical Field
The utility model relates to the technical field of helium detectors, in particular to a battery top cover plate double-station helium detector.
Background
The tightness of an explosion-proof valve and the like of the battery top cover plate has great influence on the use safety of the battery, and in order to ensure the tightness of the battery top cover plate, tightness detection is required in the production process of the battery top cover plate. Currently, a helium detector is generally used for detecting the tightness of a battery top cover in the market.
When the battery top cover is detected, the battery cover plate is generally placed in the feeding cavity, helium is filled into the feeding cavity, and the detection is carried out after the helium filling operation is completed. As disclosed in application number 2018211397884, the automatic helium leak detector for the top cover plate of the power battery is characterized in that when the automatic helium leak detector for the top cover plate of the power battery works, firstly, the battery cover plate is placed in a feeding cavity, then the feeding cavity is vacuumized through a vacuum pump, then helium is filled into the feeding cavity through a helium filling device, and after the helium filling operation is completed and the automatic helium leak detector is kept for a period of time, helium content detection is carried out on the feeding cavity. However, in the process of implementing the present utility model, the inventors found that the following problems exist in the prior art: when helium is filled into the feeding cavity, more helium is filled in order to ensure the pressure of the helium in the feeding cavity, and the purpose of detection can be achieved only by filling more helium.
Disclosure of Invention
Based on the above, the utility model aims to provide a battery top cover plate double-station helium detector, which can achieve the purpose of detection under the condition of using less helium gas when detecting the battery top cover plate.
The battery top cover plate double-station helium detector comprises:
a body;
the feeding device is arranged on the machine body, the battery top cover plate is conveyed to the detection device through the feeding device, and the battery top cover plate is conveyed out of the detection device through the feeding device;
the detecting device is arranged on the machine body, the detecting device is arranged right above the feeding device and comprises a lifting mechanism and a detecting component, the detecting component comprises a helium detecting upper die and a helium detecting lower die, the helium detecting upper die is connected with the lifting mechanism, the lifting mechanism drives the helium detecting upper die to ascend or descend, a placing cavity is arranged on the helium detecting lower die and is connected with the helium detecting instrument, a helium spraying cavity is arranged on the helium detecting upper die and is connected with the vacuum pump and the helium tank, and compressed air is injected into the helium spraying cavity for pressurization after the detecting device finishes spraying helium into the helium spraying cavity.
When the helium detector is used for detecting the battery top cover plate, the battery top cover plate is firstly placed in a placing cavity, the battery top cover plate is conveyed to the position below the helium detection upper die through a feeding device, and then the helium detection upper die is driven to descend through the lifting mechanism so as to enable the helium detection upper die to be matched with the helium detection lower die for sealing. And then pumping out air in the helium spraying cavity through a vacuum pump, generating negative pressure in the helium spraying cavity, and spraying helium into the helium spraying cavity after the helium detector pumps the leak rate in the placed cavity to a specified value. And then the helium detector detects the number of helium ions in the helium detection lower die, the number of the ions is more than the specified number and is unqualified, and compressed air is sprayed into the helium spraying cavity to further pressurize after the helium spraying is finished. The compressed air is sprayed in to ensure the pressure in the helium spraying cavity, reduce the content of the sprayed helium and achieve the same detection effect as the spraying of more helium. Meanwhile, after the helium spraying cavity is vacuumized to generate negative pressure, the filled helium can be ensured to be uniformly distributed in different cavities.
Further preferably, the machine body is provided with a workbench, the feeding device is arranged on the workbench, the feeding device comprises a feeding driving assembly, two sliding rails and a sliding plate, the two sliding rails are oppositely arranged on two opposite sides of the feeding driving assembly, the sliding plate is connected with the feeding driving assembly and the two sliding rails, and the feeding driving assembly drives the sliding plate to slide on the two sliding rails.
Further preferably, the lifting mechanism comprises a lifting fixing plate and a lifting driving piece, the lifting driving piece is fixed on the lifting fixing plate, a driving shaft of the lifting driving piece penetrates through the lifting fixing plate and then is connected with the helium inspection upper die, and the lifting driving piece drives the helium inspection upper die to ascend or descend relative to the feeding device.
Further preferably, the lifting mechanism further comprises a linear bearing guide rail, one end of the linear bearing guide rail is fixed on the lifting fixing plate, the helium detection upper die is arranged on the linear bearing guide rail in a penetrating mode, and the helium detection upper die is connected with the linear bearing guide rail in a sliding mode.
Further preferably, the lifting mechanism further comprises four fixing columns, the four fixing columns are fixed on the workbench, and the four fixing columns are respectively connected with four corners of the lifting fixing plate.
Still preferably, the machine body is further fixed with a protective cover assembly, the detection device is arranged in the protective cover assembly, the protective cover assembly comprises an upper protective cover and a lower protective cover, and a rear side plate of the upper protective cover is movably hinged with a rear side plate of the lower protective cover through a hinge.
Further preferably, a nitrogen spring is fixed on the machine body, one end of the nitrogen spring is connected with the left side plate and/or the right side plate of the lower protective cover, and the other end of the nitrogen spring is connected with the left side plate and/or the right side plate of the upper protective cover.
Further preferably, the feeding device and the detecting device are two, the two detecting devices are arranged side by side in the transverse direction of the machine body, and each detecting device comprises three lifting mechanisms and three detecting components.
Further preferably, the two detecting devices are respectively connected with the two helium detectors, or both detecting devices are connected with the same helium detector,
further preferably, the machine body is further provided with a touch screen, a warning lamp, a foot cup and a caster, wherein the touch screen and the warning lamp are fixed on the upper protective cover, and the foot cup and the caster are fixed at four corners of the bottom of the machine body.
Compared with the prior art, the battery top cover plate double-station helium detector has the following beneficial effects:
1. when the helium detector detects the top cover plate of the battery, the helium detector firstly vacuumizes the upper die for helium detection to generate negative pressure, then sprays a certain amount of helium, and then sprays compressed air of 0.2-0.3MPA for further pressurization. Because the vacuumizing operation is firstly carried out, the even distribution of the injected helium in the cavity can be ensured, and the detection accuracy is improved. After the helium spraying is finished, the aim of detecting the same effect as that of spraying more helium can be fulfilled on the premise of using less helium by pressurizing the sprayed compressed air.
2. The feeding device and the detecting device are two, and each detecting device comprises three detecting components. According to the utility model, the two feeding devices and the two detection devices are used for detecting simultaneously, so that the working efficiency is improved.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a battery top cover plate double-station helium detector.
FIG. 2 is another schematic diagram of a battery top cover plate dual-station helium detector.
Fig. 3 is a schematic diagram of a combination of a feeding device and a detection device.
Detailed Description
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible mentioned in this specification are defined with respect to their construction, and they are relative concepts. Therefore, the position and the use state of the device may be changed accordingly. These and other directional terms should not be construed as limiting terms.
The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of implementations consistent with aspects of the present disclosure.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, the battery top cover plate double-station helium detector comprises a machine body 1, a feeding device 2 and a detecting device 3, wherein a workbench 11 is arranged on the machine body 1, the feeding device 2 and the detecting device 3 are both fixed on the workbench 11, and the detecting device 3 is arranged right above the feeding device 2. The battery top cover plate is conveyed to the detection device 3 through the feeding device 2, and the detected battery top cover plate is conveyed out of the detection device 3 through the feeding device 2.
In order to realize the transportation of battery top cover plate, loading attachment 2 includes material loading drive assembly 21, two slide rails 22 and slide. The two slide rails 22 are oppositely arranged on two opposite sides of the feeding driving assembly 21, the slide plates are connected with the feeding driving assembly 21 and the two slide rails 22, and the feeding driving assembly 21 drives the slide plates to slide on the two slide rails 22. Preferably, the feeding driving assembly 21 is a sliding table cylinder, and the two sliding rails 22 are heavy-load sliding rails 22.
As shown in fig. 3, in order to realize the detection of the battery top cover, the detection device 3 includes a lifting mechanism 31 and a detection assembly 32. The detecting assembly 32 includes a helium detecting upper die 320, a helium detecting lower die 321, a helium detecting instrument, a vacuum pump, a helium tank, a gas path pipe, and the like. The helium detecting lower die 321 is transported by the feeding device 2. The helium detector, the vacuum pump, the helium tank and the like are all fixed at the lower part of the machine body 1, and are commonly used in the existing helium detector. The helium detecting upper die 320 is connected with the lifting mechanism 31, and the lifting mechanism 31 drives the helium detecting upper die 320 to ascend or descend. The helium detecting upper die 320 is provided with a helium spraying cavity, the helium detecting lower die 321 is provided with a placing cavity, and the helium detecting upper die 320 and the helium detecting lower die 321 are closed to form a seal. The placing cavity is connected with the helium detector, the helium spraying cavity is connected with the vacuum pump and the helium tank, and the detecting device 3 injects compressed air into the helium spraying cavity for pressurization after the helium spraying of the helium spraying cavity is finished.
The helium detector of the embodiment is provided with a detection device 3, the detection device 3 comprises a lifting mechanism 31 and a detection component 32, when the helium detector is used for detecting a battery top cover plate, the battery top cover plate is firstly placed in a placing cavity and conveyed to the position below the helium detection upper die 320 through a feeding device 2, and then the lifting mechanism 31 drives the helium detection upper die 320 to descend so that the helium detection upper die 320 and the helium detection lower die 321 are sealed in a film-closing manner. And then pumping out air in the helium spraying cavity by a vacuum pump, so that negative pressure is generated in the helium spraying cavity. And then helium is sprayed into the helium spraying cavity through a helium detector, and compressed air is sprayed into the helium spraying cavity for further pressurization after the helium spraying is finished. The compressed air is sprayed in to ensure the pressure in the cavity, reduce the content of the sprayed helium and achieve the same detection effect as the spraying of more helium. The helium gas can be uniformly distributed in different cavities after the helium gas is vacuumized in the helium checking upper die 320 to generate negative pressure.
In order to raise and lower the helium test upper mold 320, the raising and lowering mechanism 31 includes a raising and lowering fixing plate 311 and a raising and lowering driving member 312. The lifting driving piece 312 is fixed on the lifting fixing plate 311, and a driving shaft of the lifting driving piece 312 penetrates through the lifting fixing plate 311 and then is connected with the helium detecting upper die 320, and the lifting driving piece 312 drives the helium detecting upper die 320 to ascend or descend relative to the feeding device 2. Further, the lifting mechanism 31 further includes a linear bearing rail 313, one end of the linear bearing rail 313 is fixed on the lifting fixing plate 311, the helium detecting upper die 320 is inserted into the linear bearing rail 313, and the helium detecting upper die 320 is slidably connected with the linear bearing rail 313. When the lift driving member 312 drives the upper helium detecting die 320 to rise or fall, the upper helium detecting die 320 slides on the linear bearing guide 313.
In order to fix the lifting fixing plate 311, the lifting mechanism 31 further includes four fixing columns 314, the four fixing columns 314 are fixed to the table 11, and the four fixing columns 314 are connected to four corners of the lifting fixing plate 311, respectively.
In order to protect the detection device 3, a protective cover assembly 4 is also fixed on the workbench 11, and the detection device 3 is arranged inside the protective cover assembly 4. The cover assembly 4 includes an upper cover 41 and a lower cover 42, and a rear side plate of the upper cover 41 is movably hinged with a rear side plate of the lower cover 42 through a hinge. The upper shield 41 can be opened or closed with respect to the lower shield 42.
Two nitrogen springs 9 are also fixed on the machine body 1, and the two nitrogen springs 9 are respectively positioned on the left side plate and the right side plate of the lower protective cover 42. One end of the nitrogen spring 9 is connected with the left side plate and/or the right side plate of the lower protective cover 42, and the other end of the nitrogen spring 9 is connected with the left side plate and/or the right side plate of the upper protective cover 41. The left side plate and the right side plate of the upper protective cover 41 are respectively connected and fixed through the nitrogen spring 9.
The upper protective cover 41 is provided with a touch screen 5 and a warning lamp 6, and parameters of the helium detector can be set and checked through the touch screen 5. The warning lamp 6 is a three-color warning lamp 6, and when the detection result is unqualified, the warning lamp 6 is used for warning. The bottom four corners of the machine body 1 are provided with a foot cup 7 and a castor 8, and the movement of the helium detector is facilitated by the arrangement of the castor 8.
In order to improve the detection efficiency of the helium detector, the number of the feeding device 2 and the detection device 3 is two, and the two detection devices 3 are arranged side by side in the transverse direction of the machine body 1. Each detecting device 3 comprises three lifting mechanisms 31 and three detecting components 32, and each detecting device 3 can detect three products simultaneously. The three elevating mechanisms 31 are connected to helium detecting upper dies 320 of the three detecting units 32, respectively. Preferably, the lifting driving members 312 of the lifting driving mechanism are cylinders with a cylinder diameter of 80, and each lifting driving member 312 independently drives the helium detecting upper die 320 to move so as to ensure the sealing of the battery top cover plate in the placing cavity.
The two detection devices 3 are respectively connected with two helium detectors, and the two helium detectors are used for detecting the helium. The two detection devices 3 can also be connected with the same helium detector, and the detection is carried out by one helium detector.
When the helium detector detects the battery top cover plate, the battery top cover plate is firstly placed in a placing cavity of the helium detection lower die 321, and then the helium detection lower die 321 is moved to the position below the helium detection upper die 320 through the feeding device 2. Then, the upper helium detecting die 320 is driven by the lifting mechanism 31 to descend, and the placing cavity is sealed by the upper helium detecting die 320. During detection, the helium injection cavity of the helium detection upper die 320 is vacuumized to generate negative pressure, then a certain amount of helium is injected, and after the injection of the helium is finished, compressed air of 0.2-0.3MPA is injected for further pressurization. Because the vacuumizing operation is firstly carried out, the even distribution of the injected helium in the cavity can be ensured, and the detection accuracy is improved. After the helium spraying is finished, the aim of detecting the same effect as that of spraying more helium can be fulfilled on the premise of using less helium by pressurizing the sprayed compressed air. When the detection is qualified, the feeding device 2 withdraws the battery top cover plate from the detection device 3 to the feeding position, and when the detection is unqualified, the unqualified battery top cover plate is kept at the detection position and sends out an alarm through the warning lamp 6. Before the battery top cover plate is inspected, it is necessary to first confirm whether the helium detector is in an inspection state.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. Machine is examined to battery top cover board duplex position helium, its characterized in that includes:
a body;
the charging device is arranged on the machine body, the battery top cover plate is conveyed to the detection device through the charging device, and the battery top cover plate is conveyed out of the detection device through the charging device;
the detecting device is arranged on the machine body, the detecting device is arranged right above the feeding device and comprises a lifting mechanism and a detecting component, the detecting component comprises a helium detecting upper die and a helium detecting lower die, the helium detecting upper die is connected with the lifting mechanism, the lifting mechanism drives the helium detecting upper die to ascend or descend, a placing cavity is arranged on the helium detecting lower die and is connected with the helium detecting instrument, a helium spraying cavity is arranged on the helium detecting upper die and is connected with the vacuum pump and the helium tank, and compressed air is injected into the helium spraying cavity for pressurization after the detecting device finishes spraying helium into the helium spraying cavity.
2. The battery top cover plate duplex position helium detector of claim 1, wherein: the machine body is provided with a workbench, the feeding device is arranged on the workbench and comprises a feeding driving assembly, two sliding rails and a sliding plate, the two sliding rails are oppositely arranged on two opposite sides of the feeding driving assembly, the sliding plate is connected with the feeding driving assembly and the two sliding rails, and the feeding driving assembly drives the sliding plate to slide on the two sliding rails.
3. The battery top cover plate duplex position helium detector of claim 2, wherein: the lifting mechanism comprises a lifting fixing plate and a lifting driving piece, the lifting driving piece is fixed on the lifting fixing plate, a driving shaft of the lifting driving piece penetrates through the lifting fixing plate and then is connected with the helium inspection upper die, and the lifting driving piece drives the helium inspection upper die to ascend or descend relative to the feeding device.
4. A battery top cover plate duplex position helium detector according to claim 3, wherein: the lifting mechanism further comprises a linear bearing guide rail, one end of the linear bearing guide rail is fixed on the lifting fixing plate, the helium detection upper die penetrates through the linear bearing guide rail, and the helium detection upper die is in sliding connection with the linear bearing guide rail.
5. A battery top cover plate duplex position helium detector according to claim 3, wherein: the lifting mechanism further comprises four fixing columns which are fixed on the workbench and are respectively connected with four corners of the lifting fixing plate.
6. The battery top cover plate duplex position helium detector according to any one of claims 1-5, wherein: the machine body is also fixedly provided with a protective cover assembly, the detection device is arranged inside the protective cover assembly, the protective cover assembly comprises an upper protective cover and a lower protective cover, and the rear side plate of the upper protective cover is movably hinged with the rear side plate of the lower protective cover through a hinge.
7. The battery top cover plate duplex position helium detector of claim 6, wherein: the machine body is also fixedly provided with a nitrogen spring, one end of the nitrogen spring is connected with the left side plate and/or the right side plate of the lower protective cover, and the other end of the nitrogen spring is connected with the left side plate and/or the right side plate of the upper protective cover.
8. The battery top cover plate duplex position helium detector according to any one of claims 1-5, wherein: the feeding device and the detecting device are two, the two detecting devices are arranged side by side in the transverse direction of the machine body, and each detecting device comprises three lifting mechanisms and three detecting components.
9. The battery top cover plate duplex position helium detector of claim 8, wherein: the two detection devices are respectively connected with the two helium detectors, or both the two detection devices are connected with the same helium detector.
10. The battery top cover plate duplex position helium detector of claim 6, wherein: the machine body is also provided with a touch screen, a warning lamp, a foot cup and a caster, wherein the touch screen and the warning lamp are fixed on the upper protective cover, and the foot cup and the caster are fixed at four corners of the bottom of the machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320864256.1U CN219416596U (en) | 2023-04-17 | 2023-04-17 | Double-station helium detector for battery top cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320864256.1U CN219416596U (en) | 2023-04-17 | 2023-04-17 | Double-station helium detector for battery top cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219416596U true CN219416596U (en) | 2023-07-25 |
Family
ID=87236267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320864256.1U Active CN219416596U (en) | 2023-04-17 | 2023-04-17 | Double-station helium detector for battery top cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219416596U (en) |
-
2023
- 2023-04-17 CN CN202320864256.1U patent/CN219416596U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Battery top cover dual station helium detector Granted publication date: 20230725 Pledgee: Bank of China Co.,Ltd. Dongguan Branch Pledgor: Guangdong Lihong Precision Technology Co.,Ltd. Registration number: Y2024980014240 |