CN209773731U - solar cell busbar laser welding equipment - Google Patents
solar cell busbar laser welding equipment Download PDFInfo
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- CN209773731U CN209773731U CN201920584037.1U CN201920584037U CN209773731U CN 209773731 U CN209773731 U CN 209773731U CN 201920584037 U CN201920584037 U CN 201920584037U CN 209773731 U CN209773731 U CN 209773731U
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Abstract
the utility model relates to a solar cell busbar laser welding equipment contains: the laser outputs a laser beam to provide welding energy for the bus bar welding strip; a beam focusing system for focusing the laser beam to the welding region; the prepressing mechanism applies prepressing force near the area needing welding; a Z-axis movement unit for focusing and defocusing control of the laser beam; and the one-dimensional electric control motion platform drives the welding head to move along the bus bar direction, so that the welding of the whole welding strip is realized. The method comprises the following steps of (1) realizing thermal conduction welding or penetration welding, heating a welding strip by adopting a continuous laser, and realizing interconnection among tin layers by heating and hot melting a tin layer on the surface layer of the welding strip when the heating temperature is higher than a tin melting point, so as to realize thermal conduction welding; the pulse laser is focused on the welding strip, the action area forms extremely strong laser energy density, tin on the surface layer and internal copper are gasified, a cavity is formed in the bus bar welding strip so that internal copper materials are tightly occluded, and copper layers of two layers of welding strips are directly welded to form extremely high welding strength and penetration welding.
Description
Technical Field
The utility model relates to a solar cell busbar laser welding is equipped belongs to laser beam machining technical field.
Background
Currently, with the rapid development of global technology and economy, more and cleaner energy is increasingly needed to meet demand. Solar energy resources are free from carbon dioxide emission at the time of power generation and have a small environmental burden, and thus solar (e.g., photovoltaic) cells are vigorously developed as energy sources in many countries and regions.
Monolithic solar cells have limited utility and solar modules are a better choice. The solar cell module is to realize the function of generating electricity by connecting single solar cells into a whole. At present, bus bars are used as connecting and converging purposes in the packaging process of solar cell modules.
The bus bar solder strip is a tin-coated copper strip. The current main method of bus bar welding is by electric soldering iron. After the solar cells are subjected to series welding, a plurality of series of cells need to be connected through the bus bars, the cell pieces are connected in series through the bus bars, current flows through the rear junction box through the bus bars, and then the positive and negative outgoing lines are divided, so that the solar cell assembly with higher power is finally formed. The conventional welding method is to thermally weld the end lead of each string of batteries to the bus bar by using an electric iron manually or automatically by an apparatus. Firstly, preheating a welding strip to be welded to a certain temperature before welding; secondly, soldering fluxes such as solder wires or solder paste are required to be filled between the soldered solder strips; thirdly, controlling the current of the electric soldering iron and the temperature of a welding head to ensure the welding effect; and finally, applying the electric soldering iron to the position of the solder strip to be soldered with a certain pressure and keeping the position for a certain time to ensure the soldering strength. The welding method has the disadvantages of complex welding procedure, consumable cost such as soldering flux and the like, poor welding easily caused by material residue and oxidation problems of the end welded by the electric soldering iron for a long time, and the like, and is not suitable for the development requirements of intelligent, high-efficiency and high-quality manufacturing of the solar cell module.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art existence, provide a solar cell busbar laser welding equipment.
The purpose of the utility model is realized through the following technical scheme:
Solar cell busbar laser welding equipment, the characteristics are: comprises the following steps:
The laser outputs a laser beam to provide welding energy for the bus bar welding strip;
A beam focusing system for focusing the laser beam to the welding region;
The prepressing mechanism applies prepressing force near the area needing welding;
a Z-axis movement unit for focusing and defocusing control of the laser beam;
and the one-dimensional electric control motion platform drives the welding head to move along the bus bar direction, so that the welding of the whole welding strip is realized.
Further, according to the solar cell bus bar laser welding equipment, the light beam focusing system is arranged on the output light path of the laser, the light beam focusing system comprises the beam expanding lens, the reflecting mirror and the laser welding head, the beam expanding lens, the reflecting mirror and the laser welding head are arranged along the light path, laser beams expanded by the beam expanding lens enter the laser welding head through the reflecting mirror, and the laser welding head focuses the laser beams on a welding sample.
Further, the solar cell bus bar laser welding equipment comprises a laser welding head, wherein the laser welding head comprises a focusing mirror and a temperature feedback system coaxially arranged on the focusing mirror and used for monitoring the temperature of a laser welding area, the focal length of the focusing mirror is 5 mm-10000 mm, the focusing mirror forms laser beams into converged beams and focuses the converged beams on a welding sample, the temperature feedback system receives heat radiation reflected light in the welding process, the heat radiation reflected light passes through the focusing mirror and transmits the heat radiation reflected light to the temperature feedback system through a reflecting mirror, and the temperature feedback system collects welding heat radiation beams, converts the welding heat radiation beams into temperature information and calibrates the temperature of the welding area.
Further, according to the solar cell bus bar laser welding device, the laser welding head is mounted on the first Z-axis movement unit and can translate up and down to adjust the focal point of the laser welding head and the size of the laser welding spot.
Further, in the above laser welding equipment for solar cell bus bars, the first Z-axis movement unit is mounted on the one-dimensional electric control movement platform.
Furthermore, the solar cell bus bar laser welding equipment further comprises a visual image system for detecting the position of the welding strip, wherein the visual image system is mounted on the second Z-axis movement unit and can move up and down to adjust the focus of the visual image and identify the position information of the welding sample.
Further, in the above solar cell bus bar laser welding equipment, the second Z-axis movement unit is mounted on the one-dimensional electric control movement platform.
Further, in the above solar cell bus bar laser welding device, the visual image system includes a camera, and an image lens and an illumination light source connected thereto.
Further, foretell solar cell busbar laser welding equipment, wherein, prepressing mechanism contains L type grudging post, deflector and guide bar, erects an installation deflector on the side of L type grudging post, has seted up the guide way along vertical on the deflector, is equipped with the axial hole on the diaphragm of L type grudging post, and the guide bar is arranged in the axial hole, can slide from top to bottom along it, and a guide block is installed to the upper end of guide bar, and the guide block cooperates in the guide way of deflector, can slide from top to bottom along the guide way, and a spring is put to the hypomere cover of guide bar, and a pinch roller seat is installed to the lower tip of guide bar, and the upper end of spring is bottom surface looks butt under the diaphragm of L type grudging post, and the lower extreme of spring is mutually supported with the pinch roller seat, installs the pinch roller on the.
Further, according to the solar cell bus bar laser welding device, the laser welding head is a scanning galvanometer, a fixed welding head or a swinging welding head.
Further, in the above laser welding equipment for a solar cell bus bar, the laser is a continuous laser or a pulse laser, and the continuous laser heats the welding strip to heat the surface tin layer of the welding strip to realize the interconnection of tin layers, which is thermal conduction welding; the pulse laser is focused on the welding strip, strong laser energy density is formed in an action area to gasify the materials, a cavity is formed in the materials to enable the materials to be tightly occluded, and copper layers of two layers of welding strips are welded to form extremely high welding strength, so that penetration welding is realized.
Further, the solar cell bus bar laser welding equipment is characterized in that the continuous laser is a gas laser, a semiconductor laser or a fiber laser with the wavelength of 400 nm-3000 nm or 9000 nm-11000 nm and the average power of more than 10W.
Further, the laser welding equipment for the solar cell bus bar is characterized in that the pulse laser is a pulse laser with a central wavelength of 400-3000 nm or 9000-11000 nm, an average power of more than 10W, a repetition frequency of 1 Hz-10 MHz, a power of more than 10W and a pulse duration of 10 fs-10 ms.
Compared with the prior art, the utility model have apparent advantage and beneficial effect, the concrete aspect that embodies is in following:
Firstly, the utility model adopts laser to weld the bus bar, realizes thermal conduction welding or penetration welding, adopts a continuous laser to heat the welding strip, and when the heating temperature is higher than the melting point of tin (232 ℃), the tin layer on the surface layer of the welding strip is heated and melted to realize the interconnection between the tin layers, namely the thermal conduction welding; pulse laser is focused on the welding strip, extremely strong laser energy density is formed in an action area, tin on the surface layer and copper inside the welding strip are directly gasified, a cavity is formed inside the bus bar welding strip, so that copper materials inside the welding strip are tightly occluded, and copper layers of the two layers of welding strips are directly welded to form extremely high welding strength, namely penetration welding;
Secondly, the utility model uses the bus bar of the laser welding solar battery component, the welding process is simple, and preheating is not needed; the welding cost is low, and consumable materials such as soldering flux and the like are not needed; the welding quality is high, non-contact welding is realized, the welding strength is high, the welding spot is small, and traceless welding can be realized;
welding stability is good, and laser instrument heating efficiency is high, and process control is more accurate.
additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: the structure of the utility model is shown schematically;
FIG. 2: the structural schematic diagram of the pre-pressing mechanism;
FIG. 3: a process schematic of a thermal conduction weld;
FIG. 4: a process schematic diagram of penetration welding;
FIG. 5: a schematic view of a fixed spot weld;
FIG. 6: a schematic view of a straight type weld;
FIG. 7: schematic illustration of 8-shaped welding.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the solar cell bus bar laser welding device of the present invention mainly comprises:
The laser 10 outputs laser beams to provide welding energy for the bus bar welding strip, and realizes hot-melt welding or penetration welding;
a beam focusing system for focusing the laser beam to the welding region;
The prepressing mechanism 50 applies prepressing force near the area needing welding to ensure that two layers of welding strips are in full contact;
A Z-axis movement (up-down movement) unit for focusing and defocusing control of the laser beam;
The one-dimensional electric control motion platform 70 drives the welding head to move along the bus bar direction, so that the welding of the whole welding strip is realized;
the temperature feedback system 32 is used for synchronously monitoring the temperature of the laser welding area and monitoring the laser welding quality;
The visual image system 40 is used for detecting the position of the welding strip in advance, adjusting the welding track according to the position of the welding strip and accurately controlling the welding position;
The control system 90 synchronously controls the laser switch light and the one-dimensional electric control platform, can adjust laser parameters (such as laser power and the like), can adjust parameters of the motion platform (such as motion speed and the like), and can collect data of the temperature feedback system to monitor the welding effect.
A beam focusing system is arranged on an output light path of the laser 10, the beam focusing system comprises a beam expanding lens 20, a reflecting mirror 101 and a laser welding head 30 which are arranged along the light path, a laser beam output by the laser 10 passes through the beam expanding lens 20 to carry out beam expanding control on the diameter of the laser beam, the laser beam expanded by the beam expanding lens 20 enters the laser welding head 30 through the reflecting mirror 101, and the laser welding head 30 focuses the laser beam on a welding sample 60.
the laser welding head 30 comprises a focusing mirror 31 and a temperature feedback system 32 coaxially arranged on the focusing mirror 31 and used for monitoring the temperature of a laser welding area, the focal length of the focusing mirror 31 is 5 mm-10000 mm, the focusing mirror 31 forms laser beams into converged beams and focuses the converged beams on a welding sample 60, the temperature feedback system 32 receives heat radiation reflected light in the welding process, the heat radiation reflected light passes through the focusing mirror 31 and is transmitted to the temperature feedback system 32 through a reflecting mirror 101, and the temperature feedback system 32 collects welding heat radiation beams, converts the welding heat radiation beams into temperature information and calibrates the temperature of the welding area. The laser welding head 30 is mounted on the first Z-axis moving unit 81 and can be moved up and down to adjust the focal point of the laser welding head and the size of the laser welding spot. The first Z-axis movement unit 81 is mounted on the one-dimensional electronically controlled movement platform 70.
the visual image system 40 for detecting the position of the welding strip is mounted on the second Z-axis moving unit 82, and can move up and down to adjust the focus of the visual image and identify the position information of the welding sample 60. The second Z-axis motion unit 82 is mounted on the one-dimensional electronically controlled motion stage 70. The visual image system 40 includes a camera 41, and an image lens 42 and an illumination light source 43 connected thereto. The visual image system 40 can pre-determine the position of the bus bar solder strip, acquire the position information into the control system 90, and correct the welding position through the control system, thereby improving the accuracy of the welding position.
The one-dimensional electric control motion platform 70 can drive the laser welding head 30 and the visual image system 40 to move together, the welding sample 60 is fixed on a flat welding plate, and the bus bar welding strip 61 and the interconnection bar welding strip 62 are kept in a mutually overlapped state.
The control system 90 is interconnected with the laser 10 to control the on-off of the laser, the power of the laser and other parameter settings, is interconnected with the temperature feedback system 32 to acquire the current temperature of the welding area, further can judge the welding effect according to the physical characteristics of the welding material, is interconnected with the visual image system 40 to acquire the position information of the welding sample, is interconnected with the one-dimensional electric control motion platform 70 to control the setting of the parameters of the one-dimensional electric control motion platform 70 such as the motion start and stop, the motion speed and the like. When the welding method is applied to specific welding, firstly, the visual image system 40 collects the position information of the welding sample 60 and transmits the position information to the control system 90, the laser welding track is determined according to the collected position information of the welding sample 60, then the control system 90 respectively sends a laser switch instruction and a starting instruction and a stopping instruction of the motion platform to the laser 10 and the one-dimensional electric control motion platform 70, laser welding is carried out, the temperature feedback system 32 collects the temperature of a welding area in real time in the laser welding process, and the collected temperature is compared with the melting point of a welding material to judge the welding effect.
as shown in fig. 2, the prepressing mechanism 50 includes an L-shaped stand 56, a guide plate 51 and a guide rod 53, wherein the guide plate 51 is vertically installed on a side surface of the L-shaped stand 56, a guide groove is vertically formed on the guide plate 51, an axial hole is formed on a transverse plate of the L-shaped stand 56, the guide rod 53 is placed in the axial hole and can slide up and down along the axial hole, a guide block 52 is installed on an upper end portion of the guide rod 53, the guide block 52 is fitted in the guide groove of the guide plate 51 and can slide up and down along the guide groove, a spring 54 is sleeved on a lower portion of the guide rod 53, a press wheel seat is installed on a lower end portion of the guide rod 53, an upper end of the spring 54 abuts against a lower bottom surface of the transverse plate of the L-shaped stand 56, a lower end of the spring 54 abuts against the press wheel. An air cylinder is in driving connection with the L-shaped stand 56 to drive the L-shaped stand to move up and down, when the L-shaped stand is driven to preload downwards, the spring 54 on the guide rod 53 is compressed, and the larger the preloading displacement is, the larger the preloading pressure is. During prepressing, a pressing wheel 55 on the pressing wheel seat is in contact with a welding strip, the pressing wheel 55 is in rolling contact along the welding strip direction during laser welding, the welding effect is ensured, and the pressing wheel 55 is kept in front of a laser welding head in the welding advancing direction.
the prepressing mechanism 50 applies prepressing force in the vertical direction to the surface of the welding sample 60 near the welding position before welding to ensure that the welding position of the welding sample is tightly attached, the distance between the pressing position of the prepressing mechanism 50 and the welding sample 60 and the welding area is adjustable in the process of welding, and the prepressing force in the vertical direction applied to the surface of the welding sample 60 by the prepressing mechanism 50 is adjustable. During welding, the welding prepressing mechanism 50 can slide along with the one-dimensional electric control motion platform 70 and the surface prepressing of the welding sample.
The pre-pressing mechanism 50 can be controlled to lift and lower, so as to ensure that pre-pressing force along the vertical direction of the surface of the welding strip is arranged near the laser welding area, and ensure that the welding strips in the welding area are precisely attached, and the pre-pressing force can be single-point pre-pressing or multi-point pre-pressing, can be adjusted with the welding strip, can be a fixed structure which keeps the relative position with the welding strip unchanged, and can also be a moving structure which slides on the surface of the welding strip.
The laser welding head 30 may employ a scanning galvanometer, a fixed welding head, or a swing welding head. During laser welding, the laser welding may be performed by a fixed spot welding or by swing welding in a moving track.
The laser 10 is a continuous laser or a pulse laser, and as shown in fig. 3, the continuous laser is used for heating the solder strip to heat and melt the surface tin layer of the solder strip to realize interconnection between tin layers, and the continuous laser is used for performing thermal conduction welding to realize thermal conduction connection of the surface tin layer of the solder strip, i.e. thermal conduction welding.
the penetration welding is carried out by adopting a pulse laser, as shown in figure 4, the pulse laser is focused on the welding strip, strong laser energy density is formed in an action area to gasify materials, the laser directly gasifies a tin layer on the surface of the welding strip and a copper layer in the welding strip, a cavity is formed in the materials to cause the materials to be tightly occluded, and the copper layers of the two layers of welding strips are welded to form extremely high welding strength, namely, the penetration welding, so that the high-strength welding is achieved.
The continuous laser is a gas laser, a semiconductor laser or a fiber laser with the wavelength of 400 nm-3000 nm or 9000 nm-11000 nm and the average power of more than 10W.
The pulse laser has a central wavelength of 400-3000 nm or 9000-11000 nm, an average power of more than 10W, a repetition frequency of 1 Hz-10 MHz, a power of more than 10W and a pulse duration of 10 fs-10 ms.
The control system 90 comprises a motion controller, an image acquisition card and an industrial computer, wherein the motion controller can adopt PLC TF5271-0080 or a motion control board GT-400-SG, the motion controller is respectively connected with the laser and the one-dimensional electric control motion platform in a control mode, the image acquisition card is connected with the visual image system, and the motion controller, the image acquisition card and the temperature feedback system are connected with the industrial computer.
The specific weld may be a fixed spot weld, as shown in fig. 5; or laser beam swing welding, the swing mode can be in-line welding as shown in figure 6, or 8-line welding as shown in figure 7, or other modes.
to sum up, the utility model discloses a laser carries out the busbar welding, realizes thermal conduction welding or penetration welding, and thermal conduction welding adopts continuous laser to heat the welding strip, when heating temperature is higher than tin melting point 232 ℃, makes the top layer tin layer of welding strip be heated the hot melt and realizes the interconnection between the tin layer; the penetration welding is that pulse laser is focused on the welding strip to form strong laser energy density in the action zone, so that the tin on the surface layer and the copper inside are directly gasified, a cavity is formed inside the bus bar welding strip to cause the copper materials inside to be tightly occluded, and the copper layers of the two welding strips are directly welded to form high welding strength.
The utility model uses the bus bar of the laser welding solar battery component, the welding process is simple, and preheating is not needed; the welding cost is low, and consumable materials such as soldering flux and the like are not needed; the welding quality is high, non-contact welding is realized, the welding strength is high, the welding spot is small, and traceless welding can be realized; the welding stability is good, and laser instrument heating efficiency is high, and process control is more accurate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (13)
1. solar cell busbar laser welding equipment, its characterized in that: comprises the following steps:
The laser outputs a laser beam to provide welding energy for the bus bar welding strip;
a beam focusing system for focusing the laser beam to the welding region;
The prepressing mechanism applies prepressing force near the area needing welding;
a Z-axis movement unit for focusing and defocusing control of the laser beam;
and the one-dimensional electric control motion platform drives the welding head to move along the bus bar direction, so that the welding of the whole welding strip is realized.
2. the solar cell bus bar laser welding apparatus according to claim 1, characterized in that: and a beam focusing system is arranged on an output light path of the laser, the beam focusing system comprises a beam expanding lens, a reflecting mirror and a laser welding head which are arranged along the light path, a laser beam expanded by the beam expanding lens enters the laser welding head through the reflecting mirror, and the laser welding head focuses the laser beam on a welding sample.
3. The solar cell bus bar laser welding apparatus according to claim 2, wherein: the laser welding head comprises a focusing mirror and a temperature feedback system which is coaxially arranged on the focusing mirror and used for monitoring the temperature of a laser welding area, the focal length of the focusing mirror is 5-10000 mm, the focusing mirror forms laser beams into converged beams and focuses the converged beams on a welding sample, the temperature feedback system receives heat radiation reflected light in the welding process, the heat radiation reflected light passes through the focusing mirror and transmits the heat radiation reflected light to the temperature feedback system through a reflecting mirror, and the temperature feedback system collects the welding heat radiation beams and converts the welding heat radiation beams into temperature information to calibrate the temperature of the welding area.
4. the solar cell bus bar laser welding apparatus according to claim 2 or 3, wherein: the laser welding head is arranged on the first Z-axis movement unit and can translate up and down to adjust the focus of the laser welding head and the size of a laser welding spot.
5. The solar cell bus bar laser welding apparatus according to claim 4, wherein: the first Z-axis motion unit is arranged on the one-dimensional electric control motion platform.
6. The solar cell bus bar laser welding apparatus according to claim 1, characterized in that: the visual image system is arranged on the second Z-axis movement unit and can move up and down to adjust the focus of the visual image and identify the position information of the welding sample.
7. The solar cell bus bar laser welding apparatus according to claim 6, wherein: and the second Z-axis motion unit is arranged on the one-dimensional electric control motion platform.
8. the solar cell bus bar laser welding apparatus according to claim 6, wherein: the visual image system comprises a camera, an image lens and an illumination light source which are connected with the camera.
9. The solar cell bus bar laser welding apparatus according to claim 1, characterized in that: the prepressing mechanism comprises an L-shaped vertical frame, a guide plate and a guide rod, wherein the guide plate is vertically installed on the side surface of the L-shaped vertical frame, a guide groove is vertically formed in the guide plate, an axial hole is formed in a transverse plate of the L-shaped vertical frame, the guide rod is arranged in the axial hole and can slide up and down along the guide plate, a guide block is installed at the upper end of the guide rod, the guide block is matched in the guide groove of the guide plate and can slide up and down along the guide groove, a spring is sleeved on the lower section of the guide rod, a pressure wheel seat is installed at the lower end of the guide rod, the upper end of the spring is abutted against the lower bottom surface of the transverse plate of the L-shaped vertical frame, the lower end of the spring is abutted against the.
10. the solar cell bus bar laser welding apparatus according to claim 2, wherein: the laser welding head is a scanning galvanometer, a fixed welding head or a swinging welding head.
11. the solar cell bus bar laser welding apparatus according to claim 1, characterized in that: the laser is a continuous laser or a pulse laser, and the continuous laser heats the welding strip to heat and melt the surface tin layer of the welding strip to realize interconnection among tin layers, namely thermal conduction welding; the pulse laser is focused on the welding strip, strong laser energy density is formed in an action area to gasify the materials, a cavity is formed in the materials to enable the materials to be tightly occluded, and copper layers of two layers of welding strips are welded to form extremely high welding strength, namely penetration welding.
12. The solar cell bus bar laser welding apparatus according to claim 11, wherein: the continuous laser is a gas laser, a semiconductor laser or a fiber laser with the wavelength of 400 nm-3000 nm or 9000 nm-11000 nm and the average power of more than 10W.
13. The solar cell bus bar laser welding apparatus according to claim 11, wherein: the pulse laser has a central wavelength of 400-3000 nm or 9000-11000 nm, an average power of more than 10W, a repetition frequency of 1 Hz-10 MHz, a power of more than 10W and a pulse duration of 10 fs-10 ms.
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| CN201920584037.1U CN209773731U (en) | 2019-04-26 | 2019-04-26 | solar cell busbar laser welding equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878237A (en) * | 2021-10-28 | 2022-01-04 | 南京慧恪电气设备有限公司 | Lithium battery pole piece welding device and method thereof |
| CN117161561A (en) * | 2023-08-31 | 2023-12-05 | 广东芯聚能半导体有限公司 | Method and system for welding chip and copper frame and chip assembly |
-
2019
- 2019-04-26 CN CN201920584037.1U patent/CN209773731U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878237A (en) * | 2021-10-28 | 2022-01-04 | 南京慧恪电气设备有限公司 | Lithium battery pole piece welding device and method thereof |
| CN117161561A (en) * | 2023-08-31 | 2023-12-05 | 广东芯聚能半导体有限公司 | Method and system for welding chip and copper frame and chip assembly |
| CN117161561B (en) * | 2023-08-31 | 2024-04-09 | 广东芯聚能半导体有限公司 | Method and system for welding chip and copper frame and chip assembly |
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