Welding equipment

Abstract

The utility model provides welding equipment, relates to the technical field of batteries, and can reduce thermal stress of welded solar cells. The welding equipment comprises a bearing platform, a welding device and a vibration device, the bearing platform is used for bearing a to-be-welded object, the welding device is located outside the bearing platform and faces the bearing platform, the welding device is used for welding the to-be-welded object, and the vibration device is used for vibrating the bearing platform and driving the welded to-be-welded object to vibrate.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to welding equipment. Background Technology

[0002] During the battery manufacturing process, the busbars need to be soldered to the back of the solar cell using solder.

[0003] The existing solution involves heating the solder, busbar, and solar cell to a certain temperature to weld the busbar to the back of the solar cell. Due to the high welding temperature, the solar cell experiences significant thermal stress after welding, resulting in severe warping, microcracks, and a high risk of breakage. Utility Model Content

[0004] This application provides a welding device that can reduce the thermal stress of solar cells after welding.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A welding device is provided, including a support platform, a welding device, and a vibration device. The support platform is used to support the workpiece to be welded. The welding device is located outside the support platform and faces the support platform. The welding device is used to weld the workpiece to be welded. The vibration device is used to vibrate the support platform, causing the welded workpiece to vibrate.

[0007] Based on this scheme, the welding equipment includes a support platform for carrying the workpiece to be welded, a welding device for welding the workpiece, and a vibration device. Since the vibration device vibrates the support platform, it causes the workpiece to vibrate after welding. By causing the workpiece to vibrate after welding, the thermal stress in the workpiece can be released and reduced.

[0008] Preferably, the welding equipment further includes a preheating device located outside the support platform, which is used to preheat the workpiece to be welded.

[0009] Based on this scheme, since the thermal stress of the workpiece is related to its heating rate, the higher the heating rate, the greater the thermal stress. Without a preheating device, heating the workpiece to the welding temperature at a high rate shortens the heating time but results in higher thermal stress. Conversely, heating it to the welding temperature at a low rate reduces thermal stress but prolongs the heating time, leading to lower welding efficiency. Compared to schemes without a preheating device, this invention uses a preheating device to preheat the workpiece, allowing the welding device to heat it from a higher starting temperature. Compared to schemes without a preheating device, at a constant heating rate, the workpiece can be heated to the welding temperature quickly, shortening the heating time. Furthermore, at a constant heating time, a lower heating rate can be used to reach the welding temperature, reducing thermal stress.

[0010] Preferably, the preheating device includes a first laser emitter facing the support platform.

[0011] Preferably, the emission power of the first laser emitter is in the range of (0W, 40W).

[0012] Preferably, the preheating device includes a heating plate located on the upper surface of the support platform.

[0013] Preferably, the welding apparatus includes a second laser emitter, the second laser emitter having a higher emission power than the first laser emitter.

[0014] Preferably, the emission power of the second laser emitter is in the range of [40W, 80W].

[0015] Preferably, the vibration device includes an ultrasonic transmitter facing the support platform.

[0016] Preferably, the power range of the ultrasonic transmitter is [350W, 380W]. Preferably, the vibration device includes a vibration motor connected to the support platform. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a welding device provided in this application;

[0018] Figure 2 A structural schematic diagram of yet another welding device provided in this application;

[0019] Figure 3 A structural schematic diagram of yet another welding device provided in this application;

[0020] Figure 4A structural schematic diagram of yet another welding device provided in this application;

[0021] Figure 5 A structural schematic diagram of yet another welding device provided in this application;

[0022] Figure 6 This is a structural schematic diagram of another welding device provided in this application. Detailed Implementation

[0023] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0024] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being better or more advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0025] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0026] It is understood that in this application, "when," "if," and "if" all refer to the corresponding processing that will be carried out under certain objective circumstances, and are not limited to a specific time, nor do they require that there must be a judgment action when implemented, nor do they imply any other limitations.

[0027] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0028] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments and implementation methods of the various embodiments in this application, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the implementation methods of the various embodiments are consistent and can be mutually referenced. The technical features in different embodiments and between the implementation methods of the various embodiments can be combined according to their inherent logical relationships to form new embodiments, implementation methods, implementation methods, or implementation approaches. The following embodiments of this application do not constitute a limitation on the scope of protection of this application.

[0029] During the battery manufacturing process, the busbars need to be soldered to the back of the solar cell using solder.

[0030] The existing solution involves heating the solder, busbar, and solar cell to a certain temperature to weld the busbar to the back of the solar cell. Due to the high welding temperature, the thermal stress on the welded solar cell is large, resulting in severe warping, microcracks, and a high risk of breakage.

[0031] To solve the above problems, this utility model provides a welding device. Figure 1 A schematic diagram of the structure of a welding device provided by this utility model is shown below. Figure 1 As shown, the welding equipment 10 includes a support platform 11, a welding device 12, and a vibration device 13.

[0032] The support platform 11 is used to support the workpiece to be welded. The welding device 12 is located outside the support platform 11 and faces the support platform 11. The welding device 12 is used to weld the workpiece to be welded. The vibration device 13 is used to vibrate the support platform 11 and drive the workpiece to be welded to vibrate after welding.

[0033] For example, such as Figure 1 As shown, the materials to be soldered may include solar cells, solder, and busbars. Of course, the materials to be soldered may also be other materials, and this invention does not impose specific limitations on them.

[0034] A solar cell is a device that can directly convert sunlight into electrical energy. It is mainly made of semiconductor materials such as silicon. Depending on the materials and manufacturing processes, solar cells can be classified into various types, including monocrystalline silicon solar cells and polycrystalline silicon solar cells.

[0035] Solder has good electrical conductivity, corrosion resistance and welding performance. For example, solder can be silver paste, copper wire, tinned copper wire, tin solder, etc. Of course, solder can also be other materials, and this utility model does not make specific restrictions on them.

[0036] Busbars can collect the DC power generated by solar cells, and also have the functions of transmitting power, splitting power, and dissipating heat.

[0037] like Figure 1 As shown, a silicone film can also be placed around the object to be welded.

[0038] Silicone film is a membrane made of silicone rubber or other related materials, possessing excellent elasticity and sealing properties. In the battery industry, silicone film is commonly used for encapsulating and protecting solar cells, as well as bonding them to other components. Silicone films can be categorized into various types, such as silicone rubber films and specialty films.

[0039] In the embodiments provided by this utility model, by providing a silicone film around the workpieces to be soldered, the movement between the workpieces to be soldered can be reduced.

[0040] Optionally, the welding device 12 includes a second laser emitter.

[0041] The second laser emitter can be a fiber laser welder, a solid-state laser welder, a laser brazing machine, or a pulsed laser welder. Of course, the second laser emitter can also be other types of laser welding devices 12, and this utility model does not impose specific limitations on this.

[0042] The laser emitted by the second laser emitter can completely cover the object to be welded, welding all areas of the object at once. Alternatively, the laser emitted by the second laser emitter can also cover part of the object to be welded, allowing each area of ​​the object to be welded to be welded individually by moving the second laser emitter.

[0043] The emission power of the second laser emitter is in the range of [40W, 80W]. For example, the emission power of the second laser emitter can be 40W, 50W, 60W, 70W, or 80W.

[0044] Optionally, the vibration device 13 can be an ultrasonic transmitter 131 facing the support platform 11.

[0045] An ultrasonic transmitter 131 is a device capable of generating ultrasonic waves, typically consisting of a piezoelectric crystal or other type of transducer capable of generating high-frequency vibrations.

[0046] The ultrasonic transmitter 131 can be a piezoelectric ultrasonic transmitter 131, a magnetostrictive ultrasonic transmitter 131, or a magnetic ultrasonic transmitter 131. Of course, the ultrasonic transmitter 131 can also be other types of ultrasonic transmitters 131, and this utility model does not impose specific limitations on it.

[0047] The piezoelectric ultrasonic transmitter 131 utilizes the piezoelectric effect of piezoelectric materials. When a high-frequency sinusoidal AC voltage is applied to the piezoelectric material, the piezoelectric material will generate electrostrictive motion, thereby generating ultrasonic waves.

[0048] The magnetostrictive ultrasonic transmitter 131 is based on the magnetostrictive effect of ferromagnetic materials. In an alternating magnetic field, ferromagnetic materials will stretch or contract along the direction of the magnetic field, thereby generating mechanical vibration and ultrasonic waves.

[0049] The magnetic ultrasonic transmitter 131 generates ultrasonic waves through electromagnetic induction. The electromagnetic transmitter converts electric current into a magnetic field, and then converts the magnetic field into mechanical vibration, thereby generating ultrasonic waves.

[0050] The power range of the ultrasonic transmitter 131 is [350W, 380W]. For example, the power of the ultrasonic transmitter 131 is 350W, 360W, 370W, or 380W. In the case where the vibration device 13 is an ultrasonic transmitter 131 facing the support platform 11, Figure 2 A schematic diagram of the structure of another welding device 10 provided by this utility model is shown below. Figure 2 As shown, the ultrasonic transmitter 131 in the welding equipment 10 is located at a certain distance below the support platform 11. The ultrasonic transmitter 131 faces the support platform 11 and vibrates the support platform 11 by emitting ultrasonic waves, which in turn causes the welded object to vibrate.

[0051] Optionally, the vibration device 13 can also be a vibration motor connected to the support platform 11.

[0052] The vibration motor 132 can be a rotor motor, a linear motor, an iron-core vibration motor, or a linear vibration motor. Of course, the vibration motor 132 can also be other types of vibration motors. This utility model does not impose any specific limitations on this.

[0053] When the vibration device 13 is a vibration motor connected to the bearing platform 11, Figure 3 A schematic diagram of the structure of another welding device 10 provided by this utility model is shown below. Figure 3 As shown, the vibration motor 132 in the welding equipment 10 is connected to the support platform 11. The vibration of the vibration motor 132 can vibrate the support platform 11, causing the welded object to vibrate.

[0054] Based on this scheme, the welding equipment 10 includes a support platform 11 for carrying the workpiece to be welded, a welding device 12 for welding the workpiece to be welded, and a vibration device 13. Since the vibration device 13 can vibrate the support platform 11, it can cause the workpiece to be welded to vibrate after welding. By causing the workpiece to be welded to vibrate, the thermal stress in the workpiece can be released, thereby reducing the thermal stress in the workpiece.

[0055] In one design, Figure 4 A schematic diagram of the structure of another welding device 10 provided by this utility model is shown below. Figure 4 As shown, the welding equipment 10 also includes a preheating device 14, which is located outside the support platform 11 and is used to preheat the workpiece to be welded.

[0056] Optionally, the preheating device 14 can be a first laser emitter 141 facing the support platform 11.

[0057] The first laser emitter 141 can be a fiber laser emitter, a solid-state laser emitter, or a pulsed laser emitter. Of course, the first laser emitter 141 can also be other types of laser emitting devices, and this utility model does not impose specific limitations on them.

[0058] The laser emitted by the first laser emitter 141 can completely cover the workpiece to be soldered, preheating all areas of the workpiece at once. Alternatively, the laser emitted by the first laser emitter 141 can also cover a portion of the workpiece to be soldered, preheating each area of ​​the workpiece to be soldered one by one by moving the first laser emitter 141.

[0059] The second laser emitter has a higher emission power than the first laser emitter. The emission power of the first laser emitter 141 ranges from 0W to 40W. For example, the emission power of the first laser emitter 141 is 10W, 20W, or 30W.

[0060] Taking the preheating device 14 as an example, which is the first laser emitter 141 facing the support platform 11, Figure 5 A schematic diagram of the structure of another welding device 10 provided in this application is shown below. Figure 5 As shown, the first laser emitter 141 is located above the support platform 11 and faces the support platform 11.

[0061] Optionally, the preheating device 14 may also be a heating plate 142 located on the upper surface of the support platform 11.

[0062] The heating wire in the heating plate 142 can be made of silver, copper, aluminum or iron. Of course, the heating wire in the heating plate 142 can also be made of one or more metals. This utility model does not make any specific restrictions on this.

[0063] The heating wire of the heating plate 142 can be circular, rectangular or any shape, and this application does not impose any specific restrictions on it.

[0064] Taking the preheating device 14 as an example, which can be a heating plate 142 located on the upper surface of the support platform 11, Figure 6 A schematic diagram of the structure of another welding device 10 provided in this application is shown below. Figure 6As shown, the heating plate 142 is located on the upper surface of the support platform 11.

[0065] Based on this scheme, since the thermal stress of the workpiece is related to its heating rate, the higher the heating rate, the greater the thermal stress. Without the preheating device 14, heating the workpiece to the welding temperature at a high rate shortens the heating time but results in higher thermal stress. Conversely, heating it to the welding temperature at a low rate reduces thermal stress but lengthens the heating time, leading to lower welding efficiency. Compared to the scheme without the preheating device 14, this invention uses the preheating device 14 to preheat the workpiece, allowing the welding device 12 to heat it from a higher starting temperature. Compared to the scheme without the preheating device 14, at a constant heating rate, the workpiece can be heated to the welding temperature quickly, shortening the heating time and improving welding efficiency. Furthermore, at a constant heating time, a lower heating rate can be used to heat the workpiece to the welding temperature, reducing thermal stress.

[0066] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding apparatus characterized by comprising: The welding device comprises a bearing platform, a welding device and a vibration device, the bearing platform is used for bearing a to-be-welded object, the welding device is located outside the bearing platform and faces the bearing platform, the welding device is used for welding the to-be-welded object, and the vibration device is used for vibrating the bearing platform to drive the to-be-welded object after welding to vibrate; the to-be-welded object is provided with a silica gel film at the periphery, and the to-be-welded object comprises a solar cell, solder and a bus bar; The welding device further comprises a preheating device, the preheating device is located outside the bearing platform, and the preheating device is used for preheating the to-be-welded object. The preheating device comprises a first laser emitter facing the bearing platform. The welding device comprises a second laser emitter, and the emission power of the second laser emitter is greater than the transmission power of the first laser emitter.

2. The welding apparatus of claim 1, wherein, The emission power of the first laser emitter ranges from 0 W to 40 W.

3. The welding apparatus of claim 1, wherein, The preheating device comprises a heating plate located on the upper surface of the bearing platform.

4. The welding apparatus of claim 1, wherein, The emission power of the second laser emitter ranges from 40 W to 80 W.

5. The welding apparatus of any of claims 1-3, wherein, The vibration device comprises an ultrasonic emitter facing the bearing platform.

6. The welding apparatus of claim 5, wherein, The power of the ultrasonic emitter ranges from 350 W to 380 W.

7. The welding apparatus of any of claims 1-3, wherein, The vibration device comprises a vibration motor connected to the bearing platform.

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