Cooling system and solar cell series welding equipment

Abstract

The utility model relates to a cooling system and solar cell series welding equipment. The cooling system is used for cooling at least one supporting bottom plate of a welding conveyor in the solar cell series welding equipment. The cooling system comprises a cooling liquid barrel, a pump, a radiator and a cooling liquid flow channel arranged in the supporting bottom plate. The cooling liquid barrel, the pump, the cooling liquid flow channel and the radiator are connected through connecting pipes to form a cooling loop. The pump is configured to circulate the coolant within the coolant tub in the cooling circuit. The cooling system is installed on the supporting bottom plate, when the temperature of the supporting bottom plate is overheated, cooling liquid in the cooling liquid barrel can be pumped into the cooling liquid flow channel of the supporting bottom plate through the pump, the supporting bottom plate is cooled, the cooling liquid can be cooled through the radiator, the supporting bottom plate is cooled through circulation of the cooling liquid, the cooling effect is good, and the cooling effect is good. The temperature control precision is high, noise is avoided, the cooling medium is recycled, and the cost is low.

Description

Technical Field

[0001] This application relates to the field of solar photovoltaic cell production equipment, specifically a cooling system and solar cell string bonding equipment. Background Technology

[0002] In battery string welding equipment, battery cells and welding strips are laid, stacked, and welded together on a welding conveyor to form battery strings. A conventional welding conveyor includes a conveyor belt for carrying and transporting the battery cells, a support base plate below the conveyor belt for supporting the conveyor belt surface, and a heating lamp box above the conveyor belt for welding the welding strips onto the battery cells.

[0003] As the welding process progresses, the temperature of the support base plate rises due to heat transfer from the heating lamp box and the high-temperature solar cells. According to welding process requirements, the temperature of the support base plate needs to be controlled within a certain range. Therefore, cooling the support base plate is usually necessary to prevent over-welding of the solar cells and welding strips due to overheating. Currently, the common cooling method is to use a blower to cool the support base plate, but this method is ineffective, resulting in low temperature control accuracy. Furthermore, the blower generates significant noise, affecting the surrounding environment. Utility Model Content

[0004] This application addresses the problem of poor cooling effect of welding conveyors in existing stringing equipment by providing a cooling system with good cooling effect and a solar cell stringing equipment.

[0005] The technical solution of this application is as follows:

[0006] In a first aspect, this application provides a cooling system for cooling at least one support base plate of a welding conveyor used in solar cell stringing equipment. The cooling system includes a coolant tank, a pump, a radiator, and a coolant flow channel disposed within the support base plate. The coolant tank, pump, coolant flow channel, and radiator are connected by connecting pipes to form a cooling circuit. The pump is configured to circulate the coolant in the coolant tank within the cooling circuit.

[0007] By installing a cooling system on the support base plate, when the support base plate overheats, the pump can pump the coolant from the coolant tank into the coolant flow channel of the support base plate to cool the support base plate. The radiator can also cool the coolant. By circulating the coolant to cool the support base plate, the cooling effect is good, the temperature control accuracy is high, there is no noise, and the cooling medium is recycled, resulting in low cost.

[0008] Optionally, the coolant tank, pump, coolant channel, and radiator are connected in sequence through connecting pipes to form a cooling circuit. The coolant in the coolant tank is pumped into the coolant channel to cool the support base plate, and then cooled by the radiator before returning to the coolant tank.

[0009] By connecting the coolant tank, pump, coolant flow channel, and radiator in sequence, the high-temperature coolant flowing out from the support base plate is cooled by the radiator before returning to the coolant tank. This ensures that the coolant tank always contains low-temperature coolant, and the pump also draws out low-temperature coolant, thus avoiding contact between the pump and the high-temperature coolant and extending the pump's service life.

[0010] Optionally, the coolant flow channel is an I-shaped, bow-shaped, cross-shaped, zigzag-shaped, or curved channel formed within the support base plate.

[0011] The shape of the coolant flow channel can be selected according to the actual situation of the supporting base plate, providing a variety of options.

[0012] Optionally, the boiling point of the coolant is higher than the maximum operating temperature of the support base plate.

[0013] Setting the boiling point of the coolant to be higher than the maximum operating temperature of the support base plate can prevent the coolant from vaporizing and generating steam when cooling the support base plate, which would affect the welding quality. This ensures that the coolant in the coolant channel is always in a liquid state, thus guaranteeing the cooling effect.

[0014] Optionally, when the cooling system is used to cool at least two support base plates, the cooling system further includes a first manifold block and a second manifold block; the inlet of the first manifold block is connected to the outlet of the pump, and the outlet of the first manifold block is connected to the inlet of the coolant flow channel in each support base plate; the outlet of the second manifold block is connected to the inlet of the radiator, and the inlet of the second manifold block is connected to the outlet of the coolant flow channel in each support base plate.

[0015] When at least two support base plates need cooling, at least two coolant flow channels are connected in parallel through two manifold blocks, so that the coolant tank, pump and radiator can be shared, saving equipment costs.

[0016] Optionally, each coolant flow channel has at least one inlet and at least one outlet; a solenoid valve or a pneumatic valve is installed on the connecting pipe between the inlet of each coolant flow channel and the first manifold block.

[0017] By installing solenoid valves or pneumatic valves on the connecting pipes of each coolant flow channel inlet, the opening and closing of each coolant flow channel can be controlled individually. When the support base plate overheats, the solenoid valve or pneumatic valve at the corresponding coolant flow channel inlet is opened to cool the support base plate; when the support base plate cools down to the required temperature, the corresponding solenoid valve or pneumatic valve is closed to prevent the support base plate from becoming too cold.

[0018] Secondly, this application provides a solar cell string bonding device, including a welding conveyor, which includes a conveyor belt and multiple supporting base plates. The multiple supporting base plates are installed below the conveying surface of the conveyor belt and are arranged sequentially along the conveying direction of the conveyor belt. The multiple supporting base plates are used to cooperate in supporting the conveying surface of the conveyor belt. At least one supporting base plate is equipped with a cooling system.

[0019] By installing a cooling system on at least one support plate of the welding conveyor of the solar cell string welding equipment, the corresponding support plate can be cooled in time to prevent over-welding of the cells and welding strips due to overheating of the support plate, thereby ensuring the welding quality of the cell string.

[0020] Optionally, the solar cell stringing equipment also includes a welding light box, which is set on the conveying path of the welding conveyor and located above the conveyor belt; a supporting base plate located directly below the welding light box is a welding base plate, and a supporting base plate located behind the welding light box and adjacent to the welding base plate is a cooling base plate, and a cooling system is installed on the cooling base plate or the welding base plate.

[0021] Because the temperature control requirements for the cooling base plate and welding base plate on the welding conveyor are high, installing a cooling system on the cooling base plate or welding base plate can prevent the cooling base plate or welding base plate from overheating and improve the welding quality.

[0022] Optionally, the solar cell stringing equipment also includes a welding light box, which is set on the conveying path of the welding conveyor and located above the conveyor belt; a supporting base plate located directly below the welding light box is the welding base plate, and a supporting base plate located behind the welding light box and adjacent to the welding base plate is the cooling base plate. A cooling system is installed on both the cooling base plate and the welding base plate.

[0023] Because the temperature control requirements for the cooling base plate and welding base plate on the welding conveyor are high, installing a cooling system on both the cooling base plate and welding base plate can prevent them from overheating and further improve the welding quality.

[0024] Optionally, a heating rod and a temperature sensor are also installed inside the support base plate where the cooling system is installed.

[0025] By installing heating rods, when the equipment is started, the support base plate can be heated from room temperature to a set temperature range to meet the welding requirements. By installing temperature sensors, the temperature of the support base plate can be sensed in real time to prevent the support base plate from overheating or cooling. Attached Figure Description

[0026] Figure 1 This is a front view schematic diagram of an optional embodiment of the solar cell string bonding equipment in this application;

[0027] Figure 2 for Figure 1 Top view;

[0028] Figure 3 This is a schematic diagram of the cooling system in an embodiment of this application;

[0029] Figure 4 for Figure 1 A three-dimensional structural diagram of the supporting base plate;

[0030] Figure 5 for Figure 4 The main view;

[0031] Figure 6 for Figure 5 AA section view in the image.

[0032] Figures 1-6 Including:

[0033] Solar cell string bonding equipment 1;

[0034] 10 Welding conveyor, 11 conveyor belt, 12 supporting base plate, 121 welding base plate, 122 cooling base plate, 13 heating rod, 14 temperature sensor, 15 adsorption hole;

[0035] Cooling system 20, coolant tank 21, pump 22, coolant flow channel 23, inlet 231, outlet 232, plug 233, radiator 24, connecting pipe 25, first manifold block 26, second manifold block 27, solenoid valve 28;

[0036] Welding light box 30;

[0037] 100 solar cells. Detailed Implementation

[0038] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1 , Figure 2 As shown, this application discloses a solar cell stringing apparatus 1 for welding solar cells 100 into a string. The solar cell stringing apparatus 1 includes a welding conveyor 10, which includes a conveyor belt 11 and multiple supporting base plates 12. The multiple supporting base plates 12 are installed below the conveying surface of the conveyor belt 11 and are arranged sequentially along the conveying direction of the conveyor belt 11. The multiple supporting base plates 12 are used to support the conveying surface of the conveyor belt 11. At least one supporting base plate 12 is equipped with a cooling system 20. The cooling system 20 is used to cool at least one supporting base plate 12 of the welding conveyor 10.

[0040] By installing a cooling system 20 on the welding conveyor 10 of the solar cell string welding equipment 1, the support base plate 12 of the welding conveyor 10 can be cooled in time to prevent the cells from over-welding due to the overheating of the support base plate 12, thereby ensuring the quality of the cell string.

[0041] like Figure 3 As shown, the cooling system 20 of this application includes a coolant tank 21, a pump 22, a radiator 24, and a coolant flow channel 23 disposed in the support base plate 12; wherein: the coolant tank 21, the pump 22, the coolant flow channel 23, and the radiator 24 are connected by a connecting pipe 25 to form a cooling circuit; the pump 22 is configured to circulate the coolant in the coolant tank 21 in the cooling circuit.

[0042] By installing a cooling system 20 on the support base plate 12, when the support base plate 12 overheats, the pump 22 can pump the coolant in the coolant tank 21 into the coolant flow channel 23 of the support base plate 12 to cool the support base plate 12. The radiator 24 can cool the coolant. By circulating the coolant to cool the support base plate 12, the cooling effect is good, the temperature control accuracy is high, there is no noise, and the cooling medium is recycled, resulting in low cost.

[0043] In the cooling circuit, the positions of the coolant tank 21, pump 22, coolant flow channel 23 and radiator 24 should be arranged to avoid the flow of high-temperature coolant into the pump 22 as much as possible.

[0044] Optionally, in one embodiment, the coolant tank 21, the radiator 24, the pump 22, and the coolant channel 23 are sequentially connected by a connecting pipe 25 to form a cooling circuit; in another embodiment, the coolant tank 21, the coolant channel 23, the radiator 24, and the pump 22 are sequentially connected by a connecting pipe 25 to form a cooling circuit.

[0045] Optionally, in one embodiment, such as Figure 3 As shown, the coolant tank 21, pump 22, coolant flow channel 23 and radiator 24 are connected in sequence through connecting pipe 25 to form a cooling circuit. The coolant in the coolant tank 21 is sent into the coolant flow channel 23 by pump 22 to cool the support base plate 12, and then returned to the coolant tank 21 after being cooled by radiator 24.

[0046] By sequentially connecting the coolant tank 21, pump 22, coolant flow channel 23, and radiator 24, the high-temperature coolant flowing out from the support base plate 12 is cooled by the radiator 24 before returning to the coolant tank 21. This ensures that the coolant tank 21 always contains low-temperature coolant, and the pump 22 also pumps out low-temperature coolant, thus avoiding contact between the pump 22 and the high-temperature coolant and extending the service life of the pump 22.

[0047] The shape of the coolant flow channel 23 within the support base plate 12 can be arbitrarily selected. As an optional embodiment, the coolant flow channel 23 is an I-shaped, bow-shaped, cross-shaped, zigzag-shaped, or curved channel formed within the support base plate 12.

[0048] The shape of the coolant flow channel 23 can be selected according to the actual situation of the supporting base plate 12, providing a variety of options.

[0049] Figures 4-6 The coolant flow channel 23 shown is I-shaped and has two coolant inlets 231 and two coolant outlets 232. Figure 6 The arrows indicate the direction of coolant flow. The coolant enters the I-shaped coolant channel 23 from the two coolant inlets 231 to cool the support base plate 12, and then flows out from the two coolant outlets 232.

[0050] When machining the coolant flow channel 23 in the support base plate 12, each branch of the flow channel is machined into a through hole for easy machining. Then, the outer end of the through hole is sealed by the plug 233 to form the coolant flow channel 23.

[0051] As an optional implementation method, such as Figures 1-2 As shown, the boiling point of the coolant is higher than the maximum operating temperature of the support base plate 12.

[0052] Setting the boiling point of the coolant to be higher than the maximum working temperature of the support base plate 12 can prevent the coolant from vaporizing and generating steam when cooling the support base plate 12, which would affect the welding quality. This ensures that the coolant in the coolant flow channel 23 is always in a liquid state, thereby ensuring the cooling effect.

[0053] Optionally, such as Figures 4-6 As shown, the upper surface of the support base plate 12 is provided with a plurality of adsorption holes 15, and an adsorption channel communicating with the adsorption holes 15 is provided inside the support base plate 12. The adsorption channel is connected to a negative pressure air source. Correspondingly, the conveyor belt 11 of the welding conveyor 10 has through holes, and the adsorption holes 15 cooperate with the through holes to more reliably adsorb the battery cells 100.

[0054] As an optional implementation method, such as Figure 3 As shown, when the cooling system 20 is used to cool at least two support base plates 12, the cooling system 20 also includes a first manifold block 26 and a second manifold block 27; the inlet of the first manifold block 26 is connected to the outlet of the pump 22, and the outlet of the first manifold block 26 is connected to the inlet 231 of the coolant flow channel 23 in each support base plate 12; the outlet 232 of the second manifold block 27 is connected to the inlet of the radiator 24, and the inlet of the second manifold block 27 is connected to the outlet 232 of the coolant flow channel 23 in each support base plate 12.

[0055] When at least two support base plates 12 need to be cooled, at least two coolant flow channels 23 are connected in parallel through two manifold blocks, so that the coolant tank 21, pump 22 and radiator 24 can be shared, saving equipment costs.

[0056] As an optional implementation, each coolant flow channel 23 has at least one inlet 231 and at least one outlet 232; a solenoid valve 28 or a pneumatic valve is installed on the connecting pipe 25 between the inlet 231 of each coolant flow channel 23 and the first manifold block 26.

[0057] By installing solenoid valves 28 or pneumatic valves on the connecting pipes 25 of each coolant flow channel 23 inlet 231, the opening and closing of each coolant flow channel 23 can be controlled individually. When a support base plate 12 overheats, the solenoid valve 28 or pneumatic valve at the corresponding coolant flow channel 23 inlet 231 is opened to cool down the support base plate 12; when the support base plate 12 cools down to the required temperature, the corresponding solenoid valve 28 or pneumatic valve is closed to prevent the support base plate 12 from overcooling. By individually controlling the opening and closing of each coolant flow channel 23, independent temperature control of each support base plate 12 can be achieved.

[0058] See also Figure 1 , Figure 2 The solar cell string bonding equipment 1 also includes a welding lamp box 30, which is set on the conveying path of the welding conveyor 10 and located above the conveyor belt 11; a supporting base plate 12 located directly below the welding lamp box 30 is a welding base plate 121, and a supporting base plate 12 located after the welding lamp box 30 and adjacent to the welding base plate 121 is a cooling base plate 122, and a cooling system 20 is installed on the cooling base plate 122 or the welding base plate 121.

[0059] Optionally, when only cooling of the cooling base plate 122 is required, only the coolant flow channel 23 can be provided on the cooling base plate 122, and the coolant flow channel 23 of the cooling base plate 122 can be connected to the coolant tank 21, the pump 22 and the radiator 24 to form a cooling circuit.

[0060] Optionally, when only cooling is required for the welding base plate 121, a coolant flow channel 23 can be provided on the welding base plate 121, and the coolant flow channel 23 of the welding base plate 121 can be connected to the coolant tank 21, the pump 22 and the radiator 24 to form a cooling circuit.

[0061] Optionally, when both the cooling base plate 122 and the welding base plate 121 need to be cooled, the coolant flow channel 23 of the cooling base plate 122 and the coolant flow channel 23 of the welding base plate 121 can also be connected to a set of coolant tank 21, pump 22 and radiator 24 respectively to form two cooling circuits.

[0062] Since the temperature control requirements for the cooling base plate 122 and the welding base plate 121 on the welding conveyor 10 are high, the installation of the cooling system 20 on the cooling base plate 122 or the welding base plate 121 can prevent the cooling base plate 122 or the welding base plate 121 from overheating and improve the welding quality.

[0063] As an optional implementation, a cooling system 20 is installed on both the cooling base plate 122 and the welding base plate 121 in the solar cell string bonding equipment 1.

[0064] When both the cooling base plate 122 and the welding base plate 121 need to be cooled, in order to save equipment costs, the cooling base plate 122 and the welding base plate 121 can be installed in a single cooling circuit by setting the aforementioned first manifold block 26 and second manifold block 27 (e.g., ...). Figure 3 As shown), both can share the coolant tank 21, pump 22 and radiator 24. By configuring solenoid valves or pneumatic valves on the inlet pipes of the coolant flow channels 23 of the cooling base plate 122 and the welding base plate 121 respectively, independent cooling control of the cooling base plate 122 and the welding base plate 121 can also be achieved.

[0065] According to welding process requirements, the operating temperatures of the cooling base plate 122 and the welding base plate 121 are usually set differently. For example, the operating temperature of the welding base plate 121 is 120℃, and the operating temperature of the cooling base plate 122 is 110℃. In this case, the coolant can be silicone oil or automotive coolant with a boiling point higher than 120℃, thereby preventing coolant vaporization. For the welding base plate 121, when its temperature exceeds 120℃, the solenoid valve 28 or pneumatic valve on the connecting pipe 25 before the inlet 231 of its coolant flow channel 23 is opened to allow coolant to flow into its coolant flow channel 23 and lower its temperature to 120℃, and then the solenoid valve 28 or pneumatic valve is closed. For the cooling base plate 122, when its temperature exceeds 110℃, the solenoid valve 28 or pneumatic valve on the connecting pipe 25 before the inlet 231 of its coolant flow channel 23 is opened to allow coolant to flow into its coolant flow channel 23 and lower its temperature to 110℃, and then the solenoid valve 28 or pneumatic valve is closed. The welding base plate 121 and the cooling base plate 122 can be cooled separately.

[0066] As an optional implementation method, such as Figure 1 , Figure 2 As shown, a heating rod 13 and a temperature sensor 14 are also installed inside the support base plate 12 where the cooling system 20 is installed.

[0067] By setting heating rod 13, when the equipment is started, the support base plate 12 can be heated from room temperature to the set temperature range through heating rod 13, so that it meets the welding requirements; by setting temperature sensor 14, the temperature of support base plate 12 can be sensed in real time to prevent support base plate 12 from overheating or overcooling.

[0068] The foregoing has provided a sufficiently detailed and specific description of this application. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection claimed in this application is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A cooling system, characterized in that, The cooling system is used to cool at least one supporting base plate of the welding conveyor, which is used in solar cell stringing equipment. The cooling system includes a coolant tank, a pump, a radiator, and coolant channels disposed within the supporting base plate; wherein: The coolant tank, the pump, the coolant flow channel, and the radiator are connected by connecting pipes to form a cooling circuit; the pump is configured to circulate the coolant in the coolant tank in the cooling circuit.

2. The cooling system according to claim 1, characterized in that, The coolant tank, the pump, the coolant channel, and the radiator are connected in sequence through the connecting pipe to form a cooling circuit. The coolant in the coolant tank is pumped into the coolant channel to cool the support base plate, and then cooled by the radiator before returning to the coolant tank.

3. The cooling system according to claim 1, characterized in that, The coolant flow channel is an I-shaped, bow-shaped, cross-shaped, zigzag-shaped, or curved channel formed within the support base plate.

4. The cooling system according to claim 1, characterized in that, The boiling point of the coolant is higher than the maximum operating temperature of the supporting base plate.

5. The cooling system according to claim 2, characterized in that, When the cooling system is used to cool at least two of the supporting base plates, the cooling system further includes a first manifold block and a second manifold block; The inlet of the first manifold block is connected to the outlet of the pump, and the outlet of the first manifold block is connected to the inlet of the coolant flow channel in each of the supporting base plates; the outlet of the second manifold block is connected to the inlet of the radiator, and the inlet of the second manifold block is connected to the outlet of the coolant flow channel in each of the supporting base plates.

6. The cooling system according to claim 5, characterized in that, Each of the coolant channels has at least one inlet and at least one outlet; a solenoid valve or a pneumatic valve is installed on the connecting pipe between the inlet of each coolant channel and the first manifold block.

7. A solar cell string bonding device, characterized in that, The solar cell string bonding equipment includes a welding conveyor, which comprises a conveyor belt and multiple supporting base plates. The multiple supporting base plates are installed below the conveying surface of the conveyor belt and are arranged sequentially along the conveying direction of the conveyor belt. The multiple supporting base plates are used to support the conveying surface of the conveyor belt; wherein: At least one of the support base plates is equipped with a cooling system as described in any one of claims 1-6.

8. The solar cell string bonding equipment according to claim 7, characterized in that, The solar cell string bonding equipment also includes a welding light box, which is arranged on the conveying path of the welding conveyor and located above the conveyor belt; A supporting base plate located directly below the welding light box is a welding base plate, and a supporting base plate located adjacent to the welding base plate at the rear of the welding light box is a cooling base plate. The cooling base plate or the welding base plate is equipped with a cooling system as described in any one of claims 1-4.

9. The solar cell string bonding equipment according to claim 7, characterized in that, The solar cell string bonding equipment also includes a welding light box, which is arranged on the conveying path of the welding conveyor and located above the conveyor belt; A supporting base plate located directly below the welding light box is a welding base plate, and a supporting base plate located adjacent to the welding base plate at the rear of the welding light box is a cooling base plate. The cooling base plate and the welding base plate are jointly equipped with the cooling system as described in claim 5 or 6.

10. The solar cell string bonding equipment according to claim 7, characterized in that, Heating rods and temperature sensors are also installed inside the support base plate where the cooling system is installed.

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