CN218160285U - Battery piece back and side borosilicate glass remove device and chain equipment - Google Patents
Battery piece back and side borosilicate glass remove device and chain equipment Download PDFInfo
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- CN218160285U CN218160285U CN202222392581.0U CN202222392581U CN218160285U CN 218160285 U CN218160285 U CN 218160285U CN 202222392581 U CN202222392581 U CN 202222392581U CN 218160285 U CN218160285 U CN 218160285U
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
The utility model provides a battery piece back and side borosilicate glass remove device and chain equipment belongs to photovoltaic solar cell technical field, include: the hot air spraying unit comprises a hot air pipe and a plurality of spraying heads which are communicated with the hot air pipe in parallel, wherein the hot air pipe is arranged above the water film spraying groove and the etching groove, and the spraying heads correspond to the water film spraying groove and the etching grooves one by one; the heating unit is arranged between the water film spraying groove and the etching groove and is positioned below the transmitted battery piece. The utility model discloses a mode of hot-blast spraying unit and heating unit directly heats the battery piece, rather than adopting the concentration to the liquid medicine heating or promote the liquid medicine, greatly reduced the consumption of hydrofluoric acid liquid medicine, when promoting battery piece back and side borosilicate glass and get rid of, promote sculpture speed, promote production efficiency, the protection battery piece is openly not corroded, greatly reduced the consumption of resource, reduced the manufacturing cost of enterprise.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic solar cell, concretely relates to battery piece back and side borosilicate glass remove device and chain equipment.
Background
The N-type monocrystalline silicon solar cell has gradually become a mainstream product in the current photovoltaic industry due to the advantages of high cell conversion efficiency, stable generated energy and the like. The process for preparing an N-type solar cell generally comprises: texturing, boron diffusion, etching, LPCVD/PVD-ALD-PECVD-printing sintering and the like. The boron diffusion is a key step for preparing the PN junction, and is limited by the current process, a layer of borosilicate glass is formed on the front surface, the back surface and the side surface of the cell sheet by the boron diffusion, the front PN junction is only required to be reserved, the borosilicate glass on the back surface and the side part is required to be removed, and the main purpose of the etching in the third procedure is to remove the borosilicate glass.
The borosilicate glass on the back surface and the side part of the battery piece is generally removed by adopting chain type equipment, and the prior process for removing the borosilicate glass by groove type etching comprises the following steps: loading a battery piece → protecting a water film (a water film spraying groove) → HF etching (a plurality of etching grooves) → washing with water → drying. Wherein:
(1) And (4) loading the battery pieces, and sequentially placing the battery pieces subjected to boron diffusion into a working channel of the chain type etching machine through an automatic unloading device.
(2) And water film protection, namely spraying a layer of water film on the front surface of the cell through an upper spraying pipe to prevent hydrofluoric acid from sputtering to corrode the front surface, and the water film protection is a protection layer for the PN junction of the front surface.
The main chemical reagent used for etching is hydrofluoric acid, and the adopted process principle is as follows:
SiO 2 +4HF＝SiF 4 +H 2 O
however, this etching method has several problems as follows:
firstly, the solid solubility of boron in silicon dioxide is higher than that of silicon, so that in the process of preparing PN junction at high temperature, the silicon dioxide has boron absorption effect, so that a large amount of boron impurities exist in the silicon dioxide, and the boron impurities form covalent bonds with oxygen in a substitutional mode, so that the structural strength of the silicon dioxide is enhanced, and the reaction speed of hydrofluoric acid and the silicon dioxide is reduced.
Secondly, the boiling point of hydrofluoric acid itself is relatively low, which is only 19.51 ℃, the chemical reaction process needs to be carried out at normal temperature, and if the reaction temperature is raised by heating hydrofluoric acid, the hydrofluoric acid can be volatilized in a large amount, so that the reaction concentration is reduced and the hydrofluoric acid is wasted.
Since the reaction rate of the HF solution with the borosilicate glass is slow, in order to improve the production efficiency, the reaction is generally performed using the HF solution having a high concentration, and the consumption of chemicals is high. However, even the use of HF stock solution (49% concentration) still cannot meet the capacity demand, and becomes a bottleneck of capacity.
Based on the existing chain type etching equipment, some equipment manufacturers push a tank body with a heating function, namely, the HF tank is heated, and the reaction rate is improved by heating liquid medicine, however, the boiling point of HF is only 19.51 ℃, and the heating is easy to cause the volatilization of the liquid medicine, and the consumption is increased.
Based on the above two points, the etching process of borosilicate glass has become a bottleneck process of the whole N-type solar cell preparation, and the exertion of productivity is restricted.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a battery piece back and side borosilicate glass remove device and chain equipment aims at solving and improves hydrofluoric acid concentration and heating hydrofluoric acid and all has the wasting of resources's problem.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a borosilicate glass heating remove device in solar cell back and side, chain equipment based on solar cell sculpture includes:
the hot air spraying unit comprises a hot air pipe and a plurality of spraying heads which are communicated with the hot air pipe in parallel, wherein the hot air pipe is arranged above the water film spraying groove and the etching groove, the length direction of the hot air pipe is consistent with that of the water film spraying groove and the etching groove, and the spraying heads are in one-to-one correspondence to the upper parts of the water film spraying groove and each etching groove; and/or
And the heating unit is arranged between the water film spraying groove and the etching groove and is positioned below the transmitted battery piece.
In a possible implementation manner, the hot air spraying unit comprises a plurality of spraying pipes connected in parallel with the hot air pipe, and the spraying head is arranged at the lower end of the spraying pipes.
In a possible implementation manner, the distance between the lower surface of the spray header and the upper surface of the lower battery piece is greater than or equal to 10mm.
In a possible implementation manner, the spraying area of the lower surface of the spraying head completely covers the battery piece below.
In a possible implementation manner, the shape of the spray surface of the lower surface of the spray header is consistent with the shape of the battery piece below.
In a possible implementation manner, a plurality of air outlet holes are uniformly distributed on the spray header.
In a possible implementation manner, the hot air pipe is a round pipe or a square pipe.
In a possible implementation manner, the heating unit includes a heating groove and a heating wire disposed in the heating groove.
In a possible implementation manner, the shape of the heating groove is consistent with the shape of the battery piece above, and at least one battery piece is covered by the heating groove.
In a second aspect, the present invention further provides a chain type apparatus, comprising a borosilicate glass removing device for the back and the side of the battery piece.
The utility model provides a battery piece back and side borosilicate glass remove device and chain equipment compares with prior art, and beneficial effect lies in: through promoting the principle of cell piece reaction temperature in order to accelerate reaction rate, to the restriction that can not heat hydrofluoric acid, adopt reverse thinking design to invent the mode that carries out the heating to the cell piece, the cell piece after being heated contacts with hydrofluoric acid, has formed quick chemical reaction process on the cell piece surface, and etching rate promotes by a wide margin, has also promoted the transmission rate of cell piece greatly, has promoted the sculpture speed of cell piece.
The main innovative scheme of the invention is that hot air is adopted to replace a cold water film, so that the front side of the cell is protected and the temperature of the cell is increased; a high-temperature gas film is adopted to replace a water film, so that the temperature of the battery piece is quickly raised while the front side of the battery piece is protected; or set up the heating unit in the below of battery piece, heat the battery piece before the battery piece gets into the sculpture process, promote the temperature of battery piece, battery piece back and side after being heated contact with hydrofluoric acid, formed quick chemical reaction process on the battery piece surface, and then promote the etching speed, and then promote battery piece back and side borosilicate glass's removal rate, also shortened the sculpture time, promoted production efficiency.
Adopt hot-blast spraying unit and heating unit's mode directly to heat the battery piece, rather than adopting the mode to the liquid medicine heating or promote the concentration of liquid medicine to reach the purpose of temperature rise, greatly reduced the consumption of hydrofluoric acid liquid medicine, when promoting battery piece back and side borosilicate glass and get rid of, promote etching rate, promote production efficiency, greatly reduced the consumption of resource, reduced the manufacturing cost of enterprise.
The hot air spray unit that this embodiment provided has replaced the mode that conventional water film sprayed protection battery piece positive surface when using hot air spray heating battery piece, comes from the hot-blast that has certain pressure and speed of top, blows to the battery piece surface perpendicularly, then scatters to all around, can play simultaneously and block the positive effect of hydrofluoric acid sputter to the battery piece around to the protection battery piece is positive not corroded.
Drawings
Fig. 1 is a schematic structural diagram of a borosilicate glass removing apparatus for the back and side surfaces of a battery piece according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a borosilicate glass removing apparatus for the back and side surfaces of a battery piece according to an embodiment of the present invention;
description of the reference numerals:
1. a roller; 2. a hot air pipe; 3. a spray pipe; 4. a shower head; 5. a battery piece; 6. a heating tank; 7. heating wires; 8. a feeding trough; 9. etching a groove; 10. a water film; 11. a water pipe; 12. a water spray nozzle; 13. and a water film spraying groove.
Detailed Description
In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, a borosilicate glass removing apparatus for the back and side surfaces of a battery cell according to the present invention will now be described. The borosilicate glass removing device for the back and the side of the cell piece is based on chain type equipment etched by a solar cell, and comprises: the hot air spraying unit comprises a hot air pipe 2 and a plurality of spraying heads 4 which are communicated with the hot air pipe 2 in parallel, wherein the hot air pipe 2 is arranged above the etching grooves 9, the length direction of the hot air pipe is consistent with that of the etching grooves 9, and the spraying heads 4 correspond to the upper parts of the etching grooves 9 one by one; and/or
And the heating unit is arranged between the water film spraying groove 13 and the etching groove 9 and is positioned below the transmitted battery piece.
The foregoing embodiment and/or means that the removing apparatus provided in this embodiment may use a hot air spraying unit alone (as shown in fig. 1), may also use only a heating unit, may further use a hot air spraying unit disposed on the battery piece, and a heating unit disposed below the battery piece 5, and the two units are used in combination (as shown in fig. 2).
It should be noted that the cell shown in the figure is a silicon wafer after boron diffusion, that is, borosilicate glass is provided on the back surface and the side surface of the cell, and needs to be removed.
It should be further explained that, when the hot air spraying unit is adopted above the chained equipment, the hot air spraying unit replaces the water film spraying of the existing equipment, and can keep the water film spraying groove 13 (the water film spraying groove is an empty groove) required by the water film spraying, and meanwhile, the hot air pipe can extend to the water film spraying groove, so that the modification can reduce the workload of modification, keep the basic appearance of the chained equipment and reduce the modification to the original equipment; when the heating unit is additionally arranged on the chain type equipment, the heating groove is arranged between the water film spraying groove and the etching groove, and the water film is sprayed to heat the battery piece.
The chain type equipment adopts the roller 1 to convey the battery piece, and the battery piece passes through the groove bodies with different functions to achieve the final purpose.
Aiming at the prior art, the reaction speed is improved by mainly adopting the modes of improving the concentration of hydrofluoric acid and heating a hydrofluoric acid tank body. The utility model provides a battery piece back and side borosilicate glass remove device, compared with the prior art, beneficial effect lies in: through promoting the principle of cell piece reaction temperature in order to accelerate reaction rate, to the restriction that can not heat hydrofluoric acid, adopt reverse thinking design to invent the mode that carries out the heating to the cell piece, the cell piece after being heated contacts with hydrofluoric acid, has formed quick chemical reaction process on the cell piece surface, and etching rate promotes by a wide margin, has also promoted the transmission rate of cell piece greatly, has promoted the sculpture speed of cell piece.
The main innovative scheme of the device is that hot air is adopted to replace a cold water film, so that the front side of the cell is protected, and the temperature of the cell is increased; a high-temperature gas film is adopted to replace a water film, so that the temperature of the battery piece is quickly raised while the front side of the battery piece is protected; or set up the heating unit in the below of battery piece, heat the battery piece before the battery piece gets into the sculpture process, promote the temperature of battery piece, the battery piece after being heated contacts with hydrofluoric acid, has formed quick chemical reaction process on the battery piece surface, and then has promoted the sculpture speed.
Adopt the mode of hot-blast unit and heating unit to directly heat the battery piece, rather than adopting the mode to the liquid medicine heating or promote the concentration of liquid medicine to reach the purpose of temperature rise, greatly reduced the consumption of hydrofluoric acid liquid medicine, when promoting battery piece back and side borosilicate glass and get rid of, promote etching rate, promote production efficiency, greatly reduced the consumption of resource, reduced the manufacturing cost of enterprise.
The utility model discloses when using hot-blast spray heating battery piece, replaced the mode that conventional water film sprayed protection battery piece positive surface, come from the hot-blast that has certain pressure and speed of top, blow the battery piece surface perpendicularly, then to scattering all around, in heating battery piece, can play simultaneously and block hydrofluoric acid around and sputter the positive effect of battery piece to the protection is openly not corroded.
In some embodiments, referring to fig. 1, the hot blast spray unit comprises a plurality of spray pipes 3 connected in parallel to the hot blast pipe 2, and a spray header 4 is disposed at a lower end of the spray pipes 3.
In some embodiments, the distance between the lower surface of the shower head 4 and the upper surface of the lower cell 5 is greater than or equal to 10mm. When the distance from the spray header 4 to the battery piece 5 is short, the air supply pressure is small; when the distance from the spray head 4 to the battery piece is long, the pressure of air supply is large, the pressure of air supply is adjusted according to the distance from the spray head 4 to the battery piece, the air pressure to the battery piece is kept constant, and the problem that the battery piece is damaged due to too large or too small air pressure blown to the battery piece is solved.
In some embodiments, the spray area of the lower surface of the showerhead 4 completely covers the underlying cell 5.
In some embodiments, the spray face of the lower surface of the showerhead 4 is shaped to conform to the shape of the cell below. For example, the rectangular battery piece is also rectangular corresponding to the lower surface (or cross section) of the upper spray header 4; when the battery piece is circular, the lower surface of the shower head 4 is also circular.
In some embodiments, the shower head 4 has a plurality of air outlets uniformly distributed thereon. The even distribution of hot-blast that blows on the battery piece is guaranteed.
In some embodiments, the hot blast pipe 2 is a round pipe or a square pipe.
The following explains the technical features of the hot air spray unit in detail:
(1) The hot air supply system of the hot air spraying unit comprises: the purpose of the system is to generate hot air and to feed it into the hot blast pipe 2 by means of a device that creates a pressure difference, including but not limited to the following possibilities:
according to the first scheme, hot air is generated by means of heat exchange between a heating resistance wire and air.
And in the second scheme, the heat exchanger and the air exchange heat in a mode of an energy converter, a heat exchanger and the like to generate hot air.
And in the third scheme, a vortex tube with a Lanke-Huxley effect is used for generating hot air.
Scheme four, the hot-blast device of production of other physics, chemical process.
And a fifth scheme, namely equipment for conveying gas by utilizing a pressure difference principle, such as air pumps and the like.
(2) A hot air pipe 2: the hot blast pipe 2 has a pipe shape having a certain diameter and length.
(1) The material can be made of metal, PVC and the like.
(2) The material should have the properties of resisting high temperature of about 50-200 ℃, resisting 3-20 atmospheric pressures, resisting acid mist corrosion and the like.
(3) The diameter of the hot blast pipe 2 can be properly selected to be about 50-200mm according to the installation space of the equipment.
(4) The length of the hot air pipe 2 is selected according to the total length of the chain type equipment or the length of the hydrofluoric acid etching groove.
(3) A spray pipe 3: has a tubular structure with a certain diameter and length, and the upper end is connected with the hot blast pipe 2.
(1) The material can be made of metal, PVC and the like.
(2) The material should have the properties of resisting high temperature of about 50-200 ℃, resisting 3-20 atmospheric pressures, resisting acid mist corrosion and the like.
(3) The diameter of the spray pipe 3 is selected according to the diameter of the hot air pipe 2, and is equal to the diameter of the hot air pipe 2 or slightly smaller than the diameter of the hot air pipe 2.
(4) The length of the hot air pipe is selected according to the height of the hot air pipe 2 from the battery piece, and the spray header 4 is ensured to be above the battery piece.
(4) And (4) a spray header: is of a square tubular structure, and the upper end of the square tubular structure is connected with the spray pipe 3.
(1) The material can be made of metal, PVC and the like.
(2) The material should have the properties of resisting high temperature of about 50-200 ℃, resisting 3-20 atmospheric pressures, resisting acid mist corrosion and the like.
(3) The length and width of the spray surface of the spray header 4 are equal to the side length of the battery piece used below, i.e. the opening area is equal to the area of the battery piece.
(4) The perpendicular bisector of the spray surface is arranged in a centering way with the battery piece, and after the spray surface is connected with the spray pipe 3, the lower end of the spray surface has a safety distance of more than 10mm away from the battery piece.
(5) The spray header 4 is internally plugged with a capillary porous partition plate, and the aim is to uniformly blow the sent non-uniform air on the front surface of the battery piece after passing through the capillary porous partition plate.
(6) The capillary porous partition plate is made of materials with the properties of resisting high temperature of about 50-200 ℃, resisting 3-20 atmospheric pressures, resisting acid mist corrosion and the like.
(5) Parameter configuration of hot air spraying unit
(1) The pressure and temperature of the air supply are set according to the diameter and spray height of the hot air pipe 2.
(2) The larger the diameter of the hot air pipe 2 is, the higher the pressure required for air supply is. For example, when the diameter of the hot blast pipe 2 is about 100mm, the required air supply pressure is about 4 to 5 atmospheres.
(3) The higher the spray height, the higher the pressure and temperature required for the air supply. For example, when the spraying height is about 50mm, the temperature of the surface of the battery piece can reach about 100 ℃ at the air supply temperature of 120 ℃.
Optionally, a movable spray pipe 3 and a spray head 4 connected with the spray pipe 3 are arranged, the spray pipe 3 is connected below the hot air pipe 2 in a sliding mode through a sliding rail and can be communicated with the hot air pipe 2 through a hose, the moving speed of the spray pipe 3 is consistent with the speed of conveying the battery piece through the conveying belt, namely the sprayed hot air always faces the front surface of the battery piece until the etching is finished. The closed annular slide rail (which is an oval slide rail) is arranged, the spray pipe 3 can return to an initial position along the annular slide rail, and does not spray when returning from right to left, so that hot air is saved.
In some embodiments, referring to fig. 2, the heating unit includes a heating bath 6 and a heating wire 7 disposed in the heating bath 6.
In some embodiments, the heating groove 6 has a shape corresponding to the shape of the battery piece above, and covers at least one battery piece. Specifically, the heating groove 6 may cover a plurality of battery pieces in the longitudinal direction, that is, simultaneously heat the plurality of battery pieces conveyed above the conveying belt.
The heating groove 6 is mainly used for baking the battery piece in a heating wire heating mode and preheating the battery piece; the heating wire 7 may employ an intermittent pulse heating mode. And the preheated battery piece continuously enters an etching tank, a rinsing tank and a drying tank to finish the whole process operation.
Wherein, the upper hot air spray unit and the lower hot air groove can be selected to be used one by one or used at the same time.
The temperature of the air supply or the heating temperature is controlled to be about 50-200 ℃.
By using the heating mode provided by the embodiment, under the condition that the concentration of hydrofluoric acid is not changed, the temperature of the cell is raised through hot air spraying, the etching speed of the cell can be raised, the conveying speed of the cell can be further raised, and the production efficiency is improved; under the condition of not changing the conveying speed of the battery piece, the concentration of hydrofluoric acid can be reduced by heating the battery piece, and the consumption of the liquid medicine is reduced.
Based on the same inventive concept, the embodiment of the application also provides chain type equipment which comprises the borosilicate glass removing device on the back surface and the side surface of the battery piece.
Chain equipment includes material loading groove 8, water film spray tank 13, sculpture groove 9, wash bowl and stoving groove, and the battery piece passes through the water film spray tank, and water film spray tank 13 is through 12 water sprayings of water spout to the battery piece to form the protection of water film 10 on the battery piece, all preheat like the heating again, and the battery piece after preheating continues to get into sculpture groove, wash bowl and stoving groove, accomplishes whole process operation. The water film spraying groove can be selected according to the situation, and the water pipe 11 is connected to the water spraying nozzle 12.
The utility model provides a borosilicate glass remove device has solved sculpture borosilicate glass and has used the difficult problem that high concentration hydrofluoric acid and hydrofluoric acid can not heat, has improved the temperature of reaction through the mode that adopts the heating battery piece for reaction rate, equipment productivity promotes more than 1 times.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a battery piece back and side borosilicate glass remove device, chain equipment based on solar cell sculpture which characterized in that includes:
the hot air spraying unit comprises a hot air pipe (2) and a plurality of spraying heads (4) which are communicated with the hot air pipe (2) in parallel, wherein the hot air pipe (2) is arranged above a water film spraying groove (13) and an etching groove (9), the length direction of the hot air pipe is consistent with that of the water film spraying groove (13) and the etching groove (9), and the spraying heads (4) correspond to the upper parts of the water film spraying groove (13) and each etching groove (9) one by one; and/or
And the heating unit is arranged between the water film spraying groove (13) and the etching groove (9) and is positioned below the transmitted battery piece (5).
2. The battery piece back and side borosilicate glass removing apparatus according to claim 1, wherein the hot air shower unit comprises a plurality of shower pipes (3) connected in parallel to the hot air pipe (2), and the shower head (4) is disposed at the lower end of the shower pipes (3).
3. The battery piece back and side borosilicate glass removing apparatus according to claim 1 wherein the distance from the lower surface of the shower head (4) to the upper surface of the battery piece below is 10mm or more.
4. The battery piece back and side borosilicate glass removing apparatus according to claim 1 wherein the spray area of the lower surface of the spray header (4) completely covers the underlying battery piece.
5. The battery piece back and side borosilicate glass removing apparatus according to claim 4, wherein the shape of the shower face of the lower surface of the shower head (4) is identical to the shape of the battery piece below.
6. The apparatus for removing borosilicate glass on the back and side surfaces of a battery cell according to claim 1, wherein a plurality of air vents are uniformly distributed on the shower head (4).
7. The battery piece back and side borosilicate glass removing apparatus according to claim 1 wherein the hot air duct (2) is a round or square pipe.
8. The battery cell back and side borosilicate glass removing apparatus according to claim 1, wherein said heating unit comprises a heating groove (6) and a heating wire (7) disposed in said heating groove (6).
9. The battery piece back and side borosilicate glass removing apparatus according to claim 8, wherein the shape of the heating groove (6) is identical to the shape of the battery piece above and covers at least one battery piece.
10. A chain apparatus comprising the cell back and side borosilicate glass removing apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222392581.0U CN218160285U (en) | 2022-09-08 | 2022-09-08 | Battery piece back and side borosilicate glass remove device and chain equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222392581.0U CN218160285U (en) | 2022-09-08 | 2022-09-08 | Battery piece back and side borosilicate glass remove device and chain equipment |
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| Publication Number | Publication Date |
|---|---|
| CN218160285U true CN218160285U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222392581.0U Active CN218160285U (en) | 2022-09-08 | 2022-09-08 | Battery piece back and side borosilicate glass remove device and chain equipment |
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| Country | Link |
|---|---|
| CN (1) | CN218160285U (en) |
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2022
- 2022-09-08 CN CN202222392581.0U patent/CN218160285U/en active Active
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