CN220753478U - Laminated cell pole piece laser cleaning equipment - Google Patents
Laminated cell pole piece laser cleaning equipment Download PDFInfo
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- CN220753478U CN220753478U CN202322173488.5U CN202322173488U CN220753478U CN 220753478 U CN220753478 U CN 220753478U CN 202322173488 U CN202322173488 U CN 202322173488U CN 220753478 U CN220753478 U CN 220753478U
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- roller
- pole piece
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- adjusting
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- 238000004140 cleaning Methods 0.000 title claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 57
- 238000010329 laser etching Methods 0.000 claims abstract description 35
- 230000007306 turnover Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims description 64
- 238000005530 etching Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 9
- 238000007599 discharging Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Cleaning In General (AREA)
Abstract
The utility model discloses laser cleaning equipment for laminated battery cell pole pieces, which comprises a frame, wherein one end of the frame is provided with an unreeling roller, the other end of the frame is provided with a reeling roller, a first connection platform, a tension adjusting mechanism, a first driving roller, a first air knife cleaning mechanism, a front laser etching module, a plurality of material belt turn-over guide rollers, a reverse laser etching module, a second air knife cleaning mechanism, a CCD detection mechanism, a second driving roller, a NG rubberizing mechanism and a second connection platform are sequentially arranged between the unreeling roller and the reeling roller; according to the utility model, through reasonable layout of all mechanisms and combined operation of all mechanisms, the cleaning efficiency of the large-size pole piece belt and the cleaning effect of the pole pieces are improved, the production capacity of the device is obviously improved by the continuous pole piece laser cleaning device, the double-sided cleaning work of the pole pieces can be finished by unreeling and reeling the pole pieces, the production and manufacturing cost is reduced, and the production efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of pole piece production equipment, in particular to laser cleaning equipment for a laminated battery cell pole piece.
Background
Lithium ion batteries have been receiving much attention because of their high energy density, long life, light weight, environmental friendliness, etc., and have been widely used in various products such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, and new energy automobiles. The pole piece is used as an important component of the lithium ion battery, and plays a vital role in the performance of the lithium ion battery. The front and back sides of the pole piece of the battery are covered with the coating after being coated, and the coating on the front and back sides of the welding position of the pole lug can seriously influence the production and the manufacturing of the welding of the pole lug and the safety performance of the battery after the pole piece is stripped. The existing pole piece cleaning device is single in function, the pole piece is mostly cleaned only by a single working position, the cleaning effect is poor, dust collection is not centralized, deviation occurs easily to the position of the pole piece during cleaning, the cleaning effect is not ideal, and the dust remained on the pole piece after cleaning also affects the welding effect of the subsequent tab.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide laser cleaning equipment for laminated electrode core pole pieces. The laser cleaning equipment is used for cleaning and etching the large-size battery cell pole piece belt.
The aim of the utility model is achieved by the following technical scheme: the laser cleaning equipment for the laminated battery cell pole pieces comprises a frame, wherein an unreeling roller is arranged at one end of the frame, a winding roller is arranged at the other end of the frame, a first connection platform, a tension adjusting mechanism, a first driving roller, a first air knife cleaning mechanism, a front laser etching module, a plurality of material belt turn-over guide rollers, a back laser etching module, a second air knife cleaning mechanism, a CCD (charge coupled device) detection mechanism, a second driving roller, a NG rubberizing mechanism and a second connection platform are sequentially arranged between the unreeling roller and the winding roller;
the laser etching device comprises a front laser etching module and a back laser etching module, wherein the front laser etching module and the back laser etching module comprise etching guide rollers, dust removal rollers and a plurality of laser etching mechanisms arranged at intervals, the laser etching mechanisms are located above the etching guide rollers, the dust removal rollers are located on one sides of the etching guide rollers, dust removal pipelines are arranged on the other sides of the etching guide rollers, dust collection plates are arranged on the dust removal pipelines, and dust collection air nozzles are arranged on the dust collection plates. The laser etching mechanism etches and simultaneously the dust removal roller cleans dust on the surface of the pole piece belt, and the dust collection plate collects the dust. A plurality of laser etching mechanisms are used for etching simultaneously, so that the etching cleaning of the large-size pole piece belt can be met.
As an improvement of the laser cleaning equipment for the laminated battery cell pole pieces, each laser etching mechanism comprises a lifting servo drive and a lifting plate controlled to move by the lifting servo drive, and a laser head is arranged at the end part of the lifting plate.
As an improvement of the laminated battery cell pole piece laser cleaning equipment, the first air knife cleaning mechanism and the second air knife cleaning mechanism comprise a plurality of cleaning guide rollers and two L-shaped dust collecting plates which are arranged in a staggered mode at an upper and lower interval, the two L-shaped dust collecting plates are respectively positioned at two sides of the cleaning guide rollers, air blowing plates are respectively arranged on the two L-shaped dust collecting plates, a plurality of air blowing nozzles are arranged on the air blowing plates at intervals, dust exhaust pipelines are arranged at the bottoms of the two L-shaped dust collecting plates, and the two L-shaped dust collecting plates are arranged in a staggered mode.
As an improvement of the laminated battery cell pole piece laser cleaning equipment, the tension adjusting mechanism comprises two correspondingly arranged turnover plates, one ends of the two turnover plates are connected through tensioning rollers, the other ends of the two turnover plates are connected through connecting rods, the two turnover plates are controlled to rotate by one turnover control cylinder, the two turnover control cylinders are horizontally arranged, and the two turnover control cylinders simultaneously control the turnover adjusting angles of the two turnover plates.
As an improvement of the laminated battery cell pole piece laser cleaning equipment, the first driving roller and the second driving roller both comprise a main driving roller and a pressing roller, the main driving roller is connected with a driving motor through a coupler, the pressing roller is controlled to move by a pressurizing cylinder, the pressurizing cylinder is arranged on a cylinder bracket, and a pole piece belt passes through the space between the main driving roller and the pressing roller.
As an improvement of the laminated battery cell pole piece laser cleaning equipment, two sides of the first connecting platform and the second connecting platform are respectively provided with two positioning cylinders, the two positioning cylinders on the same side simultaneously control a pressing plate to move, dust exhaust holes are formed in the middle parts of the first connecting platform and the second connecting platform, dust exhaust pipelines are arranged at the bottoms of the first connecting platform and the second connecting platform, and the dust exhaust pipelines are communicated with the dust exhaust holes. When the unwinding roller unwinds the pole piece belt to the tail end, the tail end of the pole piece belt can be fixed on the pole piece belt connecting platform, the head of the pole piece belt newly unwound by the unwinding roller is also fixed on the pole piece belt connecting platform, the connection of the two pole piece belts is completed on the pole piece belt connecting platform, when the winding roller winds the tail end, the tail end of the pole piece belt can be fixed on the pole piece belt connecting platform, the head of the newly transmitted pole piece belt is also fixed on the pole piece belt connecting platform, and the connection of the two pole piece belts is completed on the pole piece belt connecting platform.
As an improvement of the laser cleaning equipment for the laminated battery cell pole pieces, the CCD detection mechanism comprises a CCD detection machine head and a servo module for controlling the CCD detection machine head to move left and right, and when the servo module controls the CCD detection machine head to move, the CCD detection machine head continuously photographs the pole piece belt. And the NG rubberizing mechanism labels the position with the defect on the surface of the polar plate according to the detection result of the CCD detection mechanism.
As an improvement of the laser cleaning equipment for the laminated battery cell pole pieces, one ends of the unreeling roller and the reeling roller are connected with a servo motor through a synchronous wheel and a synchronous belt.
As an improvement of the laminated battery core pole piece laser cleaning equipment, the utility model further comprises a regulating roller, wherein the regulating roller is arranged at two ends of the frame, a pole piece belt unreeled by the unreeled roller is conveyed to a first connection platform after passing through the regulating roller, and the winding roller passes through the regulating roller before winding the pole piece belt; one end of the adjusting roller is connected to the adjusting component. The adjusting component can adjust the conveying offset position of the pole piece belt. One end of the regulating roller is a movable end, and the height position is regulated by the regulating assembly, so that the offset position of the pole piece belt is regulated.
As an improvement of the laminated battery cell pole piece laser cleaning equipment, the adjusting assembly comprises an adjusting frame, the adjusting frame is connected with a lifting slide block through a sliding rail, one end of an adjusting roller is connected to the middle of the lifting slide block, an adjusting screw is arranged at the upper end of the adjusting frame, and one end of the adjusting screw is connected to the lifting slide block.
The utility model has the beneficial effects that: according to the utility model, through reasonable layout of all mechanisms and combined operation of all mechanisms, the cleaning efficiency of the large-size pole piece belt and the cleaning effect of the pole pieces are improved, the production capacity of the device is obviously improved by the continuous pole piece laser cleaning device, the double-sided cleaning work of the pole pieces can be finished by unreeling and reeling the pole pieces, the production and manufacturing cost is reduced, and the production efficiency is improved.
Drawings
FIG. 1 is a perspective view of the present utility model;
FIG. 2 is another directional perspective view of the present utility model;
FIG. 3 is a schematic diagram of the front side laser etching module or the back side laser etching module according to the present utility model;
FIG. 4 is a schematic structural view of a first air knife cleaning mechanism or a second air knife cleaning mechanism according to the present utility model;
FIG. 5 is a schematic view of the tension adjusting mechanism of the present utility model;
FIG. 6 is a schematic view of the configuration of the first or second drive roll of the present utility model;
FIG. 7 is a schematic view of the structure of the first docking platform or the second docking platform of the present utility model;
FIG. 8 is a schematic diagram of a CCD detection mechanism of the present utility model;
FIG. 9 is a schematic view of the unwind or wind-up roll configuration of the present utility model;
fig. 10 is a schematic view of the dancer roll configuration of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiments of the present utility model, all directional indicators (such as up, down, left, right, front, and rear … …) are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are correspondingly changed.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present utility model.
As shown in fig. 1-10, the laser cleaning device for the laminated battery cell pole piece comprises a frame 1, wherein one end of the frame 1 is provided with an unreeling roller, the other end of the frame 2 is provided with a reeling roller 3, and a first connection platform 4, a tension adjusting mechanism 5, a first driving roller 6, a first air knife cleaning mechanism 7, a front laser etching module 8, a plurality of material belt turnover guide rollers 9, a back laser etching module 10, a second air knife cleaning mechanism 11, a CCD detection mechanism 12, a NG rubberizing mechanism 14, a second driving roller 13 and a second connection platform 15 are sequentially arranged between the unreeling roller 2 and the reeling roller 3;
the front laser etching module 8 and the back laser etching module 10 respectively comprise an etching guide roller 81, a dust removal roller 82 and a plurality of laser etching mechanisms 83 which are arranged at intervals, wherein the laser etching mechanisms 83 are positioned above the etching guide roller 81, the dust removal roller 82 is positioned on one side of the etching guide roller 81, a dust removal pipeline 84 is arranged on the other side of the etching guide roller 81, a dust collection plate 85 is arranged on the dust removal pipeline 84, and a dust collection tuyere 86 is arranged on the dust collection plate 85. The laser etching mechanism 83 etches the dust while the dust removing roller cleans the dust on the surface of the pole piece belt, and the dust collecting plate collects the dust. A plurality of laser etching mechanisms are used for etching simultaneously, so that the etching cleaning of the large-size pole piece belt can be met. The two ends of the dust removing roller 82 are respectively provided with an abutting cylinder 87, and the abutting cylinders 87 can drive the dust removing roller 82 to move.
Preferably, each laser etching mechanism 83 includes a lift servo drive 831 and a lift plate 832 controlled to move by the lift servo drive, and a laser head 833 is provided at an end of the lift plate.
Preferably, the first air knife cleaning mechanism 7 and the second air knife cleaning mechanism 11 comprise a plurality of cleaning guide rollers 71 and two L-shaped dust collecting plates 72 which are arranged in a staggered mode at an upper and lower interval, the two L-shaped dust collecting plates 72 are respectively positioned at two sides of the cleaning guide rollers 71, air blowing plates 73 are respectively arranged on the two L-shaped dust collecting plates 72, a plurality of air blowing nozzles 74 are arranged on the air blowing plates 73 at intervals, dust discharging pipelines 75 are respectively arranged at the bottoms of the two L-shaped dust collecting plates 72, and the two L-shaped dust collecting plates 72 are arranged in a staggered mode up and down.
Preferably, the tension adjusting mechanism 5 includes two corresponding turnover plates 51, one ends of the two turnover plates 51 are connected through a tensioning roller 52, the other ends are connected through a connecting rod 53, the two turnover plates 51 are controlled to rotate by one turnover control cylinder 54, the two turnover control cylinders 54 are horizontally arranged, and the two turnover control cylinders 54 simultaneously control turnover adjusting angles of the two turnover plates 51.
Preferably, the first driving roller 6 and the second driving roller 13 each comprise a main driving roller 61 and a pressing roller 62, the main driving roller 61 is connected with a driving motor 63 through a coupling, the pressing roller 62 is controlled to move by a pressurizing air cylinder 64, the pressurizing air cylinder 64 is arranged on an air cylinder bracket 65, and the pole piece belt passes between the main driving roller 61 and the pressing roller 62.
Preferably, two sides of the first connection platform 4 and the second connection platform 15 are respectively provided with two positioning cylinders 41, the two positioning cylinders 41 on the same side simultaneously control a pressing plate 42 to move, the middle parts of the first connection platform 4 and the second connection platform 15 are respectively provided with a dust discharging hole 43, and the bottoms of the first connection platform 4 and the second connection platform 15 are respectively provided with a dust discharging pipeline, and the dust discharging pipelines are communicated with the dust discharging holes 43. When the unwinding roller unwinds the pole piece belt to the tail end, the tail end of the pole piece belt can be fixed on the pole piece belt connecting platform, the head of the pole piece belt newly unwound by the unwinding roller is also fixed on the pole piece belt connecting platform, the connection of the two pole piece belts is completed on the pole piece belt connecting platform, when the winding roller winds the tail end, the tail end of the pole piece belt can be fixed on the pole piece belt connecting platform, the head of the newly transmitted pole piece belt is also fixed on the pole piece belt connecting platform, and the connection of the two pole piece belts is completed on the pole piece belt connecting platform.
Preferably, the CCD detection mechanism 12 comprises a CCD detection head 121 and a servo module 122 for controlling the CCD detection head 121 to move left and right, and when the servo module 122 controls the CCD detection head to move, the CCD detection head continuously photographs the pole piece belt. And the NG rubberizing mechanism labels the position with the defect on the surface of the polar plate according to the detection result of the CCD detection mechanism. The servo module 122 includes a transmission screw, a servo motor and a cross beam, the transmission screw and the servo motor are installed on the cross beam, the servo motor is connected with the transmission screw through a coupling, the transmission screw is connected with a traversing slide plate through a screw nut, and the CCD detection machine head 121 is fixed on the traversing slide plate.
Preferably, one end of the unreeling roller 2 and one end of the reeling roller 3 are connected with a servo motor 16 through synchronous wheels and synchronous belts.
Preferably, the device also comprises a regulating roller 17, wherein the regulating roller 17 is arranged at two ends of the frame 1, the pole piece belt unreeled by the unreeled roller 2 is conveyed to the first connection platform after passing through the regulating roller 17, and the winding roller 3 passes through the regulating roller before winding the pole piece belt; one end of the adjustment roller 17 is connected to an adjustment assembly 18. The adjustment assembly 18 is capable of adjusting the transport offset position of the pole piece strip. One end of the adjusting roller 17 is a movable end, and the height position is adjusted by the adjusting component, so that the offset position of the pole piece belt is adjusted.
Preferably, the adjusting assembly 18 comprises an adjusting frame 181, the adjusting frame 181 is connected with a lifting slide block 182 through a sliding rail, one end of the adjusting roller 17 is connected with the middle part of the lifting slide block 182, an adjusting screw 183 is arranged at the upper end of the adjusting frame 181, and one end of the adjusting screw 183 is connected with the lifting slide block 182.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and structure of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The laser cleaning equipment for the laminated battery cell pole pieces comprises a frame and is characterized in that an unreeling roller is arranged at one end of the frame, a wind-up roller is arranged at the other end of the frame, a first connection platform, a tension adjusting mechanism, a first driving roller, a first air knife cleaning mechanism, a front laser etching module, a plurality of material belt turn-over guide rollers, a back laser etching module, a second air knife cleaning mechanism, a CCD detection mechanism, a second driving roller, a NG rubberizing mechanism and a second connection platform are sequentially arranged between the unreeling roller and the wind-up roller;
the laser etching device comprises a front laser etching module and a back laser etching module, wherein the front laser etching module and the back laser etching module comprise etching guide rollers, dust removal rollers and a plurality of laser etching mechanisms arranged at intervals, the laser etching mechanisms are located above the etching guide rollers, the dust removal rollers are located on one sides of the etching guide rollers, dust removal pipelines are arranged on the other sides of the etching guide rollers, dust collection plates are arranged on the dust removal pipelines, and dust collection air nozzles are arranged on the dust collection plates.
2. The laminated cell pole piece laser cleaning apparatus of claim 1, wherein each of the laser etching mechanisms includes a lift servo drive and a lift plate controlled to move by the lift servo drive, and a laser head is provided at an end of the lift plate.
3. The laminated battery cell pole piece laser cleaning device of claim 1, wherein the first air knife cleaning mechanism and the second air knife cleaning mechanism comprise a plurality of cleaning guide rollers and two L-shaped dust collecting plates which are arranged in a staggered mode at an upper and lower interval, the two L-shaped dust collecting plates are respectively positioned at two sides of the cleaning guide rollers, air blowing plates are respectively arranged on the two L-shaped dust collecting plates, a plurality of air blowing nozzles are arranged on the air blowing plates at intervals, dust exhaust pipelines are respectively arranged at the bottoms of the two L-shaped dust collecting plates, and the two L-shaped dust collecting plates are arranged in a staggered mode up and down.
4. The laminated cell pole piece laser cleaning device according to claim 1, wherein the tension adjusting mechanism comprises two correspondingly arranged turnover plates, one ends of the two turnover plates are connected through tensioning rollers, the other ends of the two turnover plates are connected through connecting rods, the two turnover plates are controlled to rotate by one turnover control cylinder, the two turnover control cylinders are horizontally arranged, and the two turnover control cylinders simultaneously control turnover adjusting angles of the two turnover plates.
5. The laminated cell pole piece laser cleaning apparatus of claim 1, wherein the first drive roller and the second drive roller each comprise a main drive roller and a press roller, the main drive rollers are connected to a drive motor through a coupling, the press rollers are controlled to move by a pressurizing cylinder, the pressurizing cylinder is mounted on a cylinder bracket, and a pole piece belt passes between the main drive rollers and the press rollers.
6. The laminated battery cell pole piece laser cleaning device of claim 1, wherein two sides of the first connection platform and the second connection platform are respectively provided with two positioning cylinders, the two positioning cylinders on the same side simultaneously control a pressing plate to move, dust exhaust holes are formed in the middle parts of the first connection platform and the second connection platform, dust exhaust pipelines are arranged at the bottoms of the first connection platform and the second connection platform, and the dust exhaust pipelines are communicated with the dust exhaust holes.
7. The laminated cell pole piece laser cleaning device according to claim 1, wherein the CCD detection mechanism comprises a CCD detection head and a servo module for controlling the CCD detection head to move left and right, and the CCD detection head continuously photographs the pole piece belt when the servo module controls the CCD detection head to move.
8. The laminated cell pole piece laser cleaning device of claim 1, wherein one end of the unreeling roller and one end of the reeling roller are connected with a servo motor through a synchronous wheel and a synchronous belt.
9. The laminated cell pole piece laser cleaning device according to claim 1, further comprising a regulating roller, wherein the regulating roller is arranged at two ends of the frame, pole piece strips unreeled by the unreeled roller pass through the regulating roller and then are conveyed to a first connection platform, and the regulating roller passes before the winding roller winds the pole piece strips; one end of the adjusting roller is connected to the adjusting component.
10. The laminated cell pole piece laser cleaning device according to claim 9, wherein the adjusting assembly comprises an adjusting frame, the adjusting frame is connected with a lifting slide block through a sliding rail, one end of the adjusting roller is connected to the middle of the lifting slide block, an adjusting screw is arranged at the upper end of the adjusting frame, and one end of the adjusting screw is connected to the lifting slide block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173488.5U CN220753478U (en) | 2023-08-14 | 2023-08-14 | Laminated cell pole piece laser cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173488.5U CN220753478U (en) | 2023-08-14 | 2023-08-14 | Laminated cell pole piece laser cleaning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220753478U true CN220753478U (en) | 2024-04-09 |
Family
ID=90558639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322173488.5U Active CN220753478U (en) | 2023-08-14 | 2023-08-14 | Laminated cell pole piece laser cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220753478U (en) |
-
2023
- 2023-08-14 CN CN202322173488.5U patent/CN220753478U/en active Active
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