Photovoltaic module welding device and photovoltaic module

Abstract

The utility model belongs to the technical field of photovoltaic module production, and provides a photovoltaic module welding device and a photovoltaic module, the photovoltaic module welding device comprises a plurality of conveyor belts which are sequentially arranged along the production direction, and a welding interval is arranged between any two adjacent conveyor belts; the at least one pair of laser probe groups are oppositely arranged on the two sides of the welding interval, any laser probe group comprises a plurality of laser probes, and the plurality of laser probes and the grid lines of the battery string are the same in number and are in one-to-one correspondence; the control end of the control mechanism is connected with the conveying belt and the laser probe, the control mechanism has a first control mode and a second control mode which can be switched, in the first control mode, the battery string moves relative to the laser probe in the production direction, and in the second control mode, the battery string is fixed relative to the laser probe. The laser probe is turned on only when the battery string is fixed relative to the laser probe. According to the utility model, the energy consumption can be reduced, the use cost is saved, and the production welding effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic component production, and in particular relates to a photovoltaic component welding device and a photovoltaic component. Background Art

[0002] The welding process of photovoltaic modules is a key step in module production. The traditional welding method is as follows: the arranged battery strings are baked and heated with lamps to melt the soldering tape and the slurry on the surface of the battery cells and fuse them together, and then pressed to achieve a tight combination of the two.

[0003] However, this requires the lamp to be constantly heated, wasting a lot of energy. Furthermore, since it is difficult to control the temperature of the lamp, the heat dissipated can damage other adjacent equipment, especially the solar cells, which often suffer irreversible damage. Therefore, a photovoltaic module welding device is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a photovoltaic module welding device and a photovoltaic module to solve the above problems, thereby reducing energy consumption, saving use costs, and improving production welding effects.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: a photovoltaic module welding device, comprising:

[0006] A plurality of conveyor belts are arranged in sequence along the production direction for conveying battery strings, and a welding zone is provided between any two adjacent conveyor belts;

[0007] At least one pair of laser probe groups are arranged opposite to each other on both sides of the welding zone, and the output ends of the pair of laser probe groups are configured to act perpendicularly on the battery string in forward and reverse directions respectively;

[0008] Wherein, any one of the laser probe groups includes a plurality of laser probes, and the number of the plurality of laser probes is the same as the number of the battery string grid lines and corresponds one to one;

[0009] The control mechanism is configured to have control ends connected to the conveyor belt and the laser probe respectively, and has a switchable first control mode and a second control mode. In the first control mode, the battery string moves along the production direction relative to the laser probe. In the second control mode, the battery string is fixed relative to the laser probe, wherein the laser probe is turned on only when the battery string is fixed relative to the laser probe.

[0010] Preferably, the control mechanism includes:

[0011] A central controller is communicatively connected to the conveyor belt and the laser probe respectively;

[0012] A photoelectric sensor is used to obtain a movement signal of the battery string on the conveyor belt, wherein the photoelectric sensor is communicatively connected to the central controller, and the photoelectric sensor and the central controller cooperate to intermittently switch between the first control mode and the second control mode, so that the battery string can be welded at the same movement distance relative to the laser probe.

[0013] Preferably, the width of the welding zone is 2-4 mm, and the length is the same as the width of the battery string.

[0014] Preferably, the control mechanism further includes:

[0015] A display screen is communicatively connected to the central controller.

[0016] Preferably, the vertical distance between the laser probe and the surface of the battery string is 4.5-5.5 cm.

[0017] A photovoltaic assembly is also provided, comprising a cell string prepared by the photovoltaic assembly welding device described in any one of the above.

[0018] Preferably, the battery string comprises:

[0019] Several battery cells are arranged in sequence along the production direction;

[0020] The soldering strips are respectively adhered to the front and back sides of two adjacent solar cells, and the number of soldering strips is the same as that of the grid lines and they correspond one to one.

[0021] Preferably, a portion of any one of the welding strips located on the gate line defines a plurality of welding points, and a distance between two adjacent welding points is not less than one fifth of the width of the battery cell.

[0022] Preferably, a spacing is provided between the two welding points located at the head and tail of any one of the welding strips and the adjacent ends of the welding strips, and the spacing is less than 2 mm.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] The utility model uses a laser probe group to replace the original lamp tube heating welding, and the laser probe group is composed of several laser probes with the same number of grid lines and one-to-one correspondence, and divides the traditional conveyor belt into several conveyor belts arranged in sequence along the production line direction. While ensuring the function of conveying the battery string, a gap is formed between two adjacent conveyor belts to constitute a welding interval, so that a pair of laser welding head groups can weld the battery string in both positive and negative directions at the same time, thereby accelerating the welding efficiency, and using a control mechanism to control the laser probe and the conveyor belt respectively, and the control mechanism is used to switch between the first control mode and the second control mode respectively, so that when welding, the battery string can move through the conveyor belt in the first control mode, and then by switching to the second control mode, the battery string is fixed relative to the laser probe, and the laser probe is controlled to start welding at this time, thereby realizing interval welding of the battery string, effectively saving energy consumption in the process, enhancing the control of temperature during welding, and improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work:

[0026] Figure 1 This is the position relationship diagram between the conveyor belt and the laser probe;

[0027] Figure 2 The position relationship diagram of the battery cell and the welding ribbon;

[0028] Figure 3 The relationship diagram between the solder joint and the battery cell;

[0029] Among them, 1. Conveyor belt; 2. Battery string; 3. Photoelectric sensor; 4. Central controller; 5. Display screen; 6. Welding ribbon; 7. Battery cell; 8. Laser probe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] Example: Refer to Figure 1-Figure 3 , a photovoltaic module welding device, comprising:

[0033] A plurality of conveyor belts 1 are arranged in sequence along the production direction for conveying battery strings 2, and a welding zone is provided between any two adjacent conveyor belts 1;

[0034] At least one pair of laser probe groups are arranged opposite to each other on both sides of the welding zone, and the output ends of the pair of laser probe groups are configured to act perpendicularly on the battery string 2 in the forward and reverse directions respectively;

[0035] Wherein, any laser probe group includes a plurality of laser probes 8, and the number of the plurality of laser probes 8 is the same as the number of grid lines of the battery string 2 and corresponds one to one;

[0036] The control mechanism is configured so that the control ends are respectively connected to the conveyor belt 1 and the laser probe 8, and have a switchable first control mode and a second control mode. In the first control mode, the battery string 2 moves along the production direction relative to the laser probe 8. In the second control mode, the battery string 2 is fixed relative to the laser probe 8, wherein the laser probe 8 is turned on only when the battery string 2 is fixed relative to the laser probe 8.

[0037] The utility model uses a laser probe group to replace the original lamp tube heating welding, and the laser probe group is composed of several laser probes 8 with the same number of grid lines and one-to-one correspondence, and divides the traditional conveyor belt 1 into several conveyor belts 1 arranged in sequence along the production line direction. While ensuring the function of conveying the battery string 2, a gap is formed between two adjacent conveyor belts 1 to constitute a welding interval, so that a pair of laser welding head groups can weld the battery string 2 in both positive and negative directions at the same time, thereby accelerating the welding efficiency, and using a control mechanism to control the laser probe 8 and the conveyor belt 1 respectively, and the control mechanism is used to switch between the first control mode and the second control mode respectively, so that when welding, the battery string 2 can move through the conveyor belt 1 in the first control mode, and then by switching to the second control mode, the battery string 2 is fixed relative to the laser probe 8, and only then is the laser probe 8 controlled to start welding, thereby realizing intermittent welding of the battery string 2, effectively saving energy consumption in the process, enhancing the control of temperature during welding, and improving the welding effect.

[0038] Furthermore, the control mechanism includes:

[0039] The central controller 4 is communicatively connected to the conveyor belt 1 and the laser probe 8 respectively;

[0040] The photoelectric sensor 3 is used to obtain the movement signal of the battery string 2 on the conveyor belt 1. The photoelectric sensor 3 is communicatively connected to the central controller 4. The photoelectric sensor 3 and the central controller 4 cooperate to intermittently switch between the first control mode and the second control mode, so that the battery string 2 can be welded at the same movement distance relative to the laser probe 8.

[0041] Reference Figure 1 , a photoelectric sensor 3 is set at the motor position on the conveyor belt 1, and the motor rotation angle is detected by the photoelectric sensor 3 to detect the moving distance of the battery string 2, thereby obtaining the movement signal of the battery string 2 on the conveyor belt 1, and the photoelectric sensor 3 is used to communicate with the central controller 4. After the photoelectric sensor 3 receives the specific angle of rotation of the motor of the conveyor belt 1, it can be determined that the battery string 2 has moved a fixed distance. The photoelectric sensor 3 can transmit the movement signal to the central controller 4, and the central controller 4 calculates and processes the signal to obtain the command signal for controlling the conveyor belt 1 to stop and the laser probe 8 to start. The command signal is transmitted to the conveyor belt 1 and the laser probe 8 respectively through the PLC control system, so that the conveyor belt 1 drives the battery string 2 to stop relative to the laser probe 8, and the laser probe 8 is turned on for laser welding. When the preset welding time is reached, the central controller 4 automatically switches back to the first control mode, drives the battery string 2 to move the next section of the same distance, and then switches back to the second control mode to repeat the welding of the battery string 2. It can be understood that the welding time can be controlled by a timer connected to the central controller 4 for communication. Its control principle is the existing technology and is not described in detail.

[0042] The central controller 4 is preferably, but not limited to, a computer.

[0043] Furthermore, the control mechanism also includes:

[0044] The display screen 5 is in communication connection with the central controller 4 .

[0045] It is convenient for personnel to operate and control the computer, improving convenience.

[0046] Furthermore, the vertical distance between the laser probe 8 and the surface of the battery string 2 is 4.5-5.5 cm.

[0047] While ensuring the normal welding operation of the laser probe 8, it prevents the laser probe 8 from being too close to the battery cell 7 to affect the structure of the battery string 2, thereby improving the welding effect.

[0048] In one embodiment of the present invention, when the grid line is a gourd string structure, a pair of laser probe groups can be arranged relatively in the welding interval, and when the required grid line is a straight line structure, two to three pairs of laser probe groups can be set in the welding interval, and the spacing between adjacent laser probe groups is maintained within the range of 5±1mm, thereby improving the applicability of the welding device.

[0049] Furthermore, the width of the welding zone is 2-4 mm, and the length is the same as the width of the battery string 2 .

[0050] Furthermore, this technical solution proposes a photovoltaic assembly, comprising a cell string 2 prepared by the above-mentioned photovoltaic welding device.

[0051] Furthermore, the battery string 2 includes:

[0052] Several battery cells 7;

[0053] The soldering strips 6 are respectively adhered to the front and back surfaces of two adjacent battery cells 7, and the number of the soldering strips 6 is the same as the number of the gate lines and they correspond one to one.

[0054] Furthermore, a portion of any welding strip 6 located on the gate line defines a plurality of welding points, and a distance between two adjacent welding points is not less than one-fifth of the width of the battery cell 7 .

[0055] By bonding the same welding ribbon 6 to the grid lines on the front and back surfaces of two adjacent battery cells 7 one by one, welding is directly performed by the laser probe 8 during the movement of the battery string 2, thereby improving the welding efficiency, and the distance between two adjacent welding points is the distance that the conveyor belt 1 drives the battery string 2 to move.

[0056] Furthermore, a distance is set between the two welding points located at the head and tail of any welding strip 6 and the ends of the adjacent welding strips 6, and the distance is less than 2 mm.

[0057] Understandable, refer to Figure 3 , the welding distance is determined according to the number of welding points required on a single grid line. Taking a single grid line with five welding points as an example, when the central controller 4 runs in the first control mode for four times and the second control mode for five times, the system determines that the last welding point of the previous welding process is completed and needs to enter the first welding point position of the next welding process. At this time, the central controller 4 switches to the third control mode, that is, the control of the moving distance of the conveyor belt 1 is: the sum of the distance between the ends of the two adjacent welding strips 6 on the same side of the two adjacent battery cells 7 and the adjacent welding points plus the width of the welding interval, to ensure that the laser probe 8 can correspond to the position of the first welding point on the next welding strip 6, thereby improving the welding effect. The moving distance of the conveyor belt 1 is controlled by the photoelectric sensor 3 in combination with the central controller 4, and the above principle can be referred to. The setting method of switching to the third control mode after the corresponding number of switching between the first control mode and the second control mode is set in the computer is the existing technology and will not be described in detail.

[0058] The working process of this embodiment is as follows:

[0059] A number of battery cells 7 are arranged in sequence on a conveyor belt 1, and the front and back surfaces of two adjacent battery cells 7 are adhered with the same welding tape 6. The conveyor belt 1 is started to transport the battery string 2 composed of the battery cells 7 and the welding tape 6. During the process, the moving distance of the conveyor belt 1 is monitored by the photoelectric sensor 3. After the battery string 2 moves the set distance, the photoelectric sensor 3 is combined with the central controller 4 to shut down the conveyor belt 1, and the laser probe 8 is turned on at the same time to perform welding operations on the front and back surfaces of the corresponding welding area, thereby improving welding efficiency, reducing working energy consumption, and improving welding effect.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A photovoltaic module welding device, characterized in that: include: A plurality of conveyor belts (1) arranged in sequence along a production direction, for conveying battery strings (2), wherein a welding zone is provided between any two adjacent conveyor belts (1); At least one pair of laser probe groups are arranged opposite to each other on both sides of the welding zone, and the output ends of the pair of laser probe groups are configured to act perpendicularly on the battery string (2) in forward and reverse directions respectively; Wherein, any one of the laser probe groups comprises a plurality of laser probes (8), and the number of the plurality of laser probes (8) is the same as the number of grid lines of the battery string (2) and corresponds one to one; The control mechanism is configured such that the control ends are respectively connected to the conveyor belt (1) and the laser probe (8), and have a switchable first control mode and a second control mode. In the first control mode, the battery string (2) moves along the production direction relative to the laser probe (8). In the second control mode, the battery string (2) is fixed relative to the laser probe (8), wherein the laser probe (8) is turned on only when the battery string (2) is fixed relative to the laser probe (8).

2. The photovoltaic module welding device according to claim 1, characterized in that: The control mechanism comprises: A central controller (4) is communicatively connected to the conveyor belt (1) and the laser probe (8) respectively; A photoelectric sensor (3) is used to obtain a movement signal of the battery string (2) on the conveyor belt (1), wherein the photoelectric sensor (3) is communicatively connected to the central controller (4), and the photoelectric sensor (3) cooperates with the central controller (4) to switch between the first control mode and the second control mode, so that the battery string (2) can be welded at the same moving distance relative to the laser probe (8).

3. The photovoltaic module welding device according to claim 1, characterized in that: The width of the welding zone is 2-4 mm, and the length is the same as the width of the battery string (2).

4. The photovoltaic module welding device according to claim 2, characterized in that: The control mechanism also includes: The display screen (5) is communicatively connected with the central controller (4).

5. The photovoltaic module welding device according to claim 1, characterized in that: The vertical distance between the laser probe (8) and the surface of the battery string (2) is 4.5-5.5 cm.

6. A photovoltaic module, characterized in that: A battery string (2) prepared by the photovoltaic module welding device according to any one of claims 1 to 5.

7. The photovoltaic module according to claim 6, characterized in that: The battery string (2) comprises: A plurality of battery cells (7) are arranged in sequence along a production direction; The welding strips (6) are respectively adhered to the front and back surfaces of two adjacent battery cells (7), and the number of the welding strips (6) is the same as that of the grid lines and they correspond one to one.

8. The photovoltaic module according to claim 7, characterized in that: A plurality of welding points are defined on the portion of any one of the welding strips (6) located on the grid line, and the distance between two adjacent welding points is not less than one fifth of the width of the battery cell (7).

9. The photovoltaic module according to claim 8, characterized in that: A spacing is provided between the two welding points located at the head and tail of any welding strip (6) and the ends of adjacent welding strips (6), and the spacing is less than 2 mm.

Images