Preheating lamp box and battery piece welding device

Abstract

The utility model provides a preheating lamp box and a battery piece welding device.The preheating lamp box comprises a heating mechanism and an air supply mechanism, and the heating mechanism comprises a heating cavity and a heating assembly arranged in the heating cavity; the air supply mechanism comprises at least one flow amplifier installed outside the heating cavity, an air inlet of the flow amplifier communicates with outside air, and an air outlet of the flow amplifier communicates with the heating cavity. The flow amplifier is configured to blow airflow into the heating cavity, and the airflow is blown out from the downward face of the heating cavity. According to the preheating lamp box, the structural design is optimized, and a ventilation pipe is replaced by the flow amplifier, so that the space is saved, and mutual interference among mechanisms in equipment is reduced; moreover, the preheating lamp box is arranged in the battery piece welding device, the temperature of the battery piece can be gradually increased before the battery piece is welded, stress concentration caused by sudden temperature rise is avoided, and therefore the risk that the battery piece is cracked due to sudden heating is remarkably reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production, and more specifically, to a preheating light box and cell welding device. Background Art

[0002] In the photovoltaic module production process, heat curing is a critical step in forming cell strings. To ensure soldering quality, production equipment is often equipped with a light box to heat the stacked cells and solder ribbons. However, to regulate the temperature within the light box and remove flux fumes, manufacturers often install ventilation ducts to ventilate the interior.

[0003] However, as the functionality of photovoltaic module production equipment increases, the number of internal mechanisms also increases. These mechanisms and ventilation ducts can easily interfere with each other during production, leading to frequent equipment downtime for maintenance and thus impacting production efficiency. Therefore, optimizing the design of the light box to avoid interference between ventilation ducts and other mechanisms has become a critical technical issue in improving the reliability and efficiency of photovoltaic module production equipment. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a preheating light box and a battery cell welding device, which adopts the following technical solutions:

[0005] In a first aspect, the present application provides a preheating light box, which includes a heating mechanism and an air supply mechanism, wherein:

[0006] The heating mechanism includes a heating chamber and a heating component arranged in the heating chamber;

[0007] The air supply mechanism includes at least one flow amplifier installed outside the heating chamber, the air inlet of the flow amplifier is connected to the outside air, and the air outlet of the flow amplifier is connected to the heating chamber;

[0008] The flow amplifier is configured to blow air into the heating chamber, and the air is blown out from a downward side of the heating chamber.

[0009] The preheating light box has been optimized in terms of structural design. A flow amplifier is used instead of a ventilation pipe. This not only saves space but also avoids interference between various internal mechanisms of the equipment, effectively reducing the risk of ventilation pipe damage and system failure, and ensuring the stability and continuity of equipment operation.

[0010] In addition, the setting of the preheating light box can gradually increase the temperature of the battery cells before welding, significantly reducing the risk of hidden cracks in the battery cells due to sudden heating, and improving the reliability and service life of the photovoltaic modules.

[0011] Optionally, a guide assembly is further provided in the heating chamber, and the guide assembly includes at least one guide plate, which is provided on the air supply path between the air outlet of the flow amplifier and the heating assembly to guide the airflow to be evenly distributed in the heating chamber.

[0012] The introduction of the guide plate significantly improves the uniform distribution of airflow, ensuring that all areas in the heating chamber can obtain uniform airflow, which directly improves the welding quality of the battery cells; through uniform airflow distribution, the guide plate helps achieve temperature uniformity in the heating chamber, reduces local overheating, and improves heat transfer efficiency.

[0013] Optionally, the guide assembly includes a first guide plate and a second guide plate spaced apart from each other, wherein:

[0014] The first guide plate is provided with a plurality of first waist holes, and the second guide plate is provided with a plurality of second waist holes. The extension direction of the first waist holes is perpendicular to the extension direction of the second waist holes.

[0015] By arranging the first and second guide plates spaced apart and making the extension direction of the waist holes vertical, the distribution of the airflow in the heating chamber can be significantly improved; this can avoid the airflow from being concentrated in a certain area and ensure the uniform distribution of the airflow;

[0016] The staggered arrangement of the guide plates creates a more optimal flow pattern for the airflow within the heating chamber, thereby achieving more uniform heat transfer. This uniform heating effect can improve the quality and consistency of battery cell welding.

[0017] Optionally, the heating assembly includes several infrared lamp tubes, and a corresponding number of cooling tubes are arranged on the sides of the infrared lamp tubes. A plurality of blowing holes are provided on the side of the cooling tubes facing the infrared lamp tubes, and the cooling tubes are used to blow air to the infrared lamp tubes.

[0018] The design of the cooling tube can effectively remove the heat generated by the infrared lamp and reduce the operating temperature of the infrared lamp; this helps prevent the infrared lamp from overheating and improves the stability and efficiency of the heating component.

[0019] Optionally, the heating mechanism further includes a heat insulation plate arranged around the heating component.

[0020] By installing thermal insulation panels around the heating component, heat loss can be effectively reduced and heating efficiency can be improved. This design can effectively maintain the operating temperature of the heating component, help improve production efficiency, and enhance overall energy efficiency.

[0021] Optionally, the flow amplifier includes an air supply pipe, a nozzle, and an air injection unit, wherein:

[0022] The diameter of the air supply pipe is larger than that of the nozzle, and the air outlet of the air supply pipe is connected to the heating chamber;

[0023] The air inlet end of the nozzle is connected to the air injection unit, and the air outlet end of the nozzle extends into the air inlet of the air supply pipe. The air injection unit pressurizes the external air into the nozzle;

[0024] The nozzle is configured to inject high-pressure airflow into the air inlet of the air supply pipe to form a low-pressure area at the air outlet end of the nozzle, so that the air around the air inlet of the air supply pipe is sucked into the air supply pipe due to the pressure difference.

[0025] The airflow amplification design of the flow amplifier can reduce energy consumption because it can increase the airflow without increasing additional energy consumption, optimizing the energy efficiency of the overall system.

[0026] Optionally, the preheating light box further includes a lifting mechanism for driving the heating mechanism to move up and down, the lifting mechanism including a support frame and a driving unit provided on the support frame, wherein:

[0027] The heating mechanism is slidably connected to the support frame and is transmission-connected to a driving unit arranged on the support frame. The driving unit is used for driving the heating mechanism to slide and rise and fall along the support frame.

[0028] The lifting mechanism enables the heating mechanism to move up and down according to actual needs, providing flexible adjustment of the heating position, which helps to adapt to the needs of different heating heights and improve the applicability of the equipment.

[0029] In a second aspect, the present application further proposes a cell welding device, which includes a welding conveying mechanism, a heat curing light box, and the above-mentioned preheating light box;

[0030] The conveying path of the welding conveyor mechanism is provided with a preheating station and a serial connection station in sequence. The welding conveyor mechanism is used to convey the battery cells and welding ribbons laid out according to the predetermined stringing rules;

[0031] The preheating light box is set at the preheating station, and is used to preheat the battery cells and solder strips that are laid out according to a predetermined string rule at the preheating station;

[0032] The heat curing light box is set at the serial connection station, and is configured to heat the preheated battery cells and welding strips located at the serial connection station, so that the welding strips are cured on the battery cells after being heated.

[0033] Through the two-stage heating treatment of preheating and thermal curing, the adhesion quality of the solder ribbon on the battery cell can be effectively improved, ensuring the strength and stability of the solder joint; in addition, stable preheating and curing temperature control can ensure consistent welding quality between each batch of battery cells and solder ribbons, reducing variability and defect rate in the production process.

[0034] The automated welding conveying mechanism can improve the operating efficiency of the production line, reduce manual intervention and operation time, and achieve efficient battery cell welding production.

[0035] Optionally, a stacking station located in front of the preheating station is further provided on the conveying path of the welding conveying mechanism, and the cell welding device further includes a cell laying mechanism and a welding ribbon laying mechanism;

[0036] The cell placement mechanism and the solder ribbon placement mechanism are configured to place the cell and solder ribbon at the stacking station according to a predetermined stringing rule.

[0037] The automated operation of the cell placement mechanism and the solder ribbon placement mechanism can significantly improve the speed and efficiency of cell and ribbon placement. The setting of the stacking station ensures that the cell and ribbon are stacked according to predetermined rules, thereby improving the accuracy and consistency of the materials and avoiding errors caused by human operation.

[0038] Optionally, the cell welding device further includes an exhaust mechanism, which is installed on at least one of the thermal curing light box, the preheating light box, and the welding conveying mechanism, and is used to exhaust the preheating station and / or the serial connection station.

[0039] The exhaust mechanism can extract the waste gas generated during the heating process and assist in cooling, thereby improving the working environment and protecting the health of the operators. Moreover, through the negative pressure effect of the exhaust mechanism, the air flow in the heating area can be reduced, thereby improving the heating efficiency.

[0040] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0041] 1. The preheating light box of this utility model has been optimized in structural design. The flow amplifier is used to replace the ventilation pipe, which not only saves space but also avoids the mutual interference between the internal mechanisms of the equipment, effectively reduces the risk of ventilation pipe damage and system failure, and ensures the stability and continuity of equipment operation;

[0042] 2. A preheating light box is installed in the cell welding device to gradually increase the temperature of the cell before welding, avoiding stress concentration caused by sudden temperature rise, thereby significantly reducing the risk of hidden cracks in the cell due to sudden heating and improving the reliability and service life of the photovoltaic module;

[0043] 3. A guide plate is installed in the preheating light box to further improve the uniformity of the airflow, avoid local overheating or uneven temperature, and ensure the consistency of the heating temperature;

[0044] 4. A cooling pipe is installed on the side of the heating component, and air is blown to the heating component through the blowing hole to effectively control the temperature of the heating component, prevent overheating, and extend the service life of the heating component;

[0045] 5. By setting up heat insulation panels around the heating components, heat loss is effectively reduced and heating efficiency is improved;

[0046] 6. Through the sleeve structure design of the air supply pipe and the nozzle, the air pressure difference is used to ensure the stability of the air flow in the air supply pipe, effectively improving the air intake efficiency and air supply effect, and ensuring the stability and consistency of the air flow in the heating chamber;

[0047] 7. Through the setting of the lifting mechanism, the lifting and lowering adjustment of the heating mechanism is realized to adapt to the objects to be welded of different sizes and thicknesses, thereby improving the applicability and operational flexibility of the equipment;

[0048] 8. The setting of the exhaust mechanism can effectively remove the residual gas in the preheating station and / or the cascade station, prevent the welding quality from being affected by gas retention, and improve the cleanliness of the heating environment and the reliability of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the three-dimensional structure of the preheating light box provided in an embodiment of the present application;

[0050] Figure 2 yes Figure 1 The three-dimensional structure diagram of the preheating light box after removing part of the heat insulation board is shown;

[0051] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the preheating light box from another perspective is shown;

[0052] Figures 1 to 3 The following reference numerals are included:

[0053] Heating chamber 1, flow amplifier 2, heat insulation plate 3, guide plate 4, infrared lamp 5, cooling tube 6. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0055] Prior art cell welding equipment typically lacks preheating equipment and instead directly uses a heat-curing light box to weld the cell and ribbon. This method allows the ribbon to cure on the cell after direct heating. However, the sudden increase in temperature during the heat-curing process can easily cause hidden cracks in the cell, which reduces the lifespan of the photovoltaic module. Furthermore, as the functionality of photovoltaic module production equipment continues to increase, the number of internal mechanisms has also increased accordingly. These complex mechanisms and ventilation ducts are prone to interference in actual production, resulting in frequent equipment downtime for maintenance, further affecting production efficiency.

[0056] In view of these problems, this application proposes a preheating light box, which has been optimized in structural design and uses a flow amplifier instead of a ventilation pipe, aiming to solve the shortcomings of the existing technology and ensure the stable operation of the equipment and the high-quality production of photovoltaic modules.

[0057] like Figure 1 As shown, the preheating light box in the embodiment of the present application includes a heating mechanism and an air supply mechanism, wherein:

[0058] The heating mechanism includes a heating chamber 1 and a heating component arranged in the heating chamber 1;

[0059] The air supply mechanism includes at least one flow amplifier 2 installed outside the heating chamber 1, the air inlet of the flow amplifier 2 is connected to the outside air, and the air outlet of the flow amplifier 2 is connected to the heating chamber 1;

[0060] The flow amplifier 2 is configured to blow air into the heating chamber 1 , and the air is blown out from a downward side of the heating chamber 1 .

[0061] It can be seen that the preheating light box of the present application has been optimized in structural design. The flow amplifier 2 is used to replace the ventilation pipe, which not only saves space but also reduces the mutual interference between the various internal mechanisms of the equipment, effectively reduces the risk of ventilation pipe damage and system failure, and ensures the stability and continuity of equipment operation.

[0062] In addition, the setting of the preheating light box can gradually increase the temperature of the battery cells before welding, avoiding stress concentration caused by sudden temperature increase, thereby significantly reducing the risk of hidden cracks in the battery cells due to sudden heating, and improving the reliability and service life of photovoltaic modules.

[0063] Among them, the heating component is mainly responsible for providing the required heat to ensure effective heating of the battery cell and the solder strip; in addition to using traditional infrared heaters (such as infrared lamps 5), the heating component can also use resistance wire heaters, ceramic heaters, hot air gun heaters, etc.

[0064] Among them, the flow amplifier 2 is a device for increasing the air flow, which has the advantages of easy installation, low energy consumption and large air volume. It can effectively introduce external air into the heating chamber 1 and improve the ventilation effect of the equipment.

[0065] During operation, the heating assembly generates heat and transfers it into heating chamber 1. Simultaneously, flow amplifier 2 in the air supply mechanism draws in external air and delivers it into heating chamber 1. The airflow is blown out from the downward side of heating chamber 1, transferring the heat from within chamber 1 to the solar cells. Furthermore, the airflow removes flux waste gases from the heating process, ensuring a clean environment within heating chamber 1.

[0066] like Figure 2As shown, the heating mechanism also includes a heat insulation plate 3 ( Figure 2 Only the insulation panels 3 on the adjacent two sides are shown as an example).

[0067] The insulation board 3 is used to surround the heating component to prevent heat loss and improve heating efficiency. It can adopt mineral wool insulation board, aluminum silicate insulation board, foam glass insulation board, ceramic fiber insulation board, insulation foam board, carbon fiber insulation board, etc., or a combination of at least two of the above; and additional insulation materials (such as insulation blankets or insulation coatings) can be added to the insulation board 3 to improve the insulation effect.

[0068] By placing heat shields 3 around the heating element, heat loss can be effectively reduced, improving heating efficiency. This design effectively maintains the operating temperature of the heating element, helping to improve production efficiency and overall energy efficiency. Furthermore, the heat shields 3 prevent heat from escaping and damaging the various circuits and electronic components within the machine.

[0069] like Figure 3 As shown, a flow guide assembly is further provided in the heating chamber 1, and the flow guide assembly includes at least one flow guide plate 4;

[0070] The guide plate 4 is arranged on the air supply path between the air outlet of the flow amplifier 2 and the heating component to guide the air flow to be evenly distributed in the heating chamber 1.

[0071] When the flow amplifier 2 sends air into the heating chamber 1, the guide plate 4 guides the flow path of the airflow through its specific shape and installation angle; the guide plate 4 can disperse the airflow to ensure that the airflow is evenly distributed in the entire heating chamber 1.

[0072] Among them, the guide plate 4 is a device for guiding the airflow, which is made of high-temperature resistant and corrosion-resistant materials, such as stainless steel, aluminum alloy or high-temperature resistant plastic; it is a flat or curved plate installed in the airflow channel; the main function of the guide plate 4 is to change the flow direction of the airflow, which can effectively reduce the turbulence or instability of the airflow, thereby achieving uniform distribution of the airflow.

[0073] The guide plate 4 can be installed by means of a bracket, bolts or welding. The bracket installation method can make the position of the guide plate 4 easier to adjust, while bolts or welding can provide a more stable fixing method.

[0074] The introduction of the guide plate 4 significantly improves the uniform distribution of the airflow, ensuring that each area in the heating chamber 1 can obtain uniform airflow, which directly improves the welding quality of the battery cells; through uniform airflow distribution, the guide plate 4 helps to achieve temperature uniformity in the heating chamber 1, reduces local overheating, and improves heat transfer efficiency.

[0075] Specifically, the guide assembly includes a first guide plate and a second guide plate arranged at intervals, wherein:

[0076] The first guide plate is provided with a plurality of first waist holes, and the second guide plate is provided with a plurality of second waist holes. The extension direction of the first waist holes is perpendicular to the extension direction of the second waist holes.

[0077] Among them, the first waist hole and the second waist hole are long strips.

[0078] When the airflow enters the heating chamber 1 from the outlet of the flow amplifier 2, it first passes through the first guide plate. The first waist holes on the first guide plate allow the airflow to pass through and provide preliminary guidance to the airflow. Due to the specific arrangement direction of these holes, the airflow will be adjusted and dispersed to a certain extent when passing through the first guide plate.

[0079] After passing through the first guide plate, the airflow reaches the second guide plate; the second waist hole on the second guide plate is perpendicular to the extension direction of the first waist hole. This setting can further adjust the direction of the airflow so that the airflow forms a staggered flow pattern in the heating chamber 1; this can avoid the airflow from being concentrated in the heating chamber 1 and ensure full coverage of the airflow.

[0080] By providing the first guide plate and the second guide plate spaced apart and making the first waist hole and the second waist hole extend in a perpendicular direction, the distribution of the airflow in the heating chamber 1 can be significantly improved; this can avoid the airflow from being concentrated in a certain area and ensure the uniform distribution of the airflow;

[0081] The staggered arrangement of the guide plates 4 allows the airflow to form a more optimal flow pattern in the heating chamber 1, thereby achieving more uniform heat transfer. This uniform heating effect can improve the quality and consistency of battery cell welding.

[0082] Continue to refer Figure 3 As shown, the heating assembly includes several infrared lamp tubes 5, and a corresponding number of cooling tubes 6 are arranged on the sides of the infrared lamp tubes 5. The cooling tubes 6 are provided with several blowing holes on the side facing the infrared lamp tubes 5, and the cooling tubes 6 are used to blow air to the infrared lamp tubes 5.

[0083] The cooling tube 6 is closely attached to the side of the infrared lamp 5 and maintains an appropriate distance from the edge of the infrared lamp 5 to ensure that the cooling airflow can effectively blow to the surface of the infrared lamp 5. The cooling tube 6 is connected to a gas supply system, which can be an air compressor or an air supply pipeline to provide a stable cooling airflow.

[0084] The design of the cooling tube 6 can effectively remove the heat generated by the infrared lamp 5 and reduce the operating temperature of the infrared lamp 5; this helps prevent the infrared lamp 5 from overheating, improves the stability and efficiency of the heating component, and extends the service life of the infrared lamp 5.

[0085] Specifically, the flow amplifier 2 includes an air supply pipe, a nozzle and an air injection unit, wherein:

[0086] The diameter of the air supply pipe is larger than that of the nozzle, and the air outlet of the air supply pipe is connected to the heating chamber 1;

[0087] The air inlet end of the nozzle is connected to the air injection unit, and the air outlet end of the nozzle extends into the air inlet of the air supply pipe. The air injection unit pressurizes the external air into the nozzle;

[0088] The nozzle is configured to inject high-pressure airflow into the air inlet of the air supply pipe to form a low-pressure area at the air outlet end of the nozzle, so that the air around the air inlet of the air supply pipe is sucked into the air supply pipe due to the pressure difference.

[0089] The gas injection unit may be an air compressor, a gas pump, an air amplifier, etc. The gas injection unit is used to pressurize the external air to the air inlet end of the nozzle.

[0090] The airflow amplification design of the Flow Amplifier 2 reduces energy consumption because it increases airflow without adding additional energy consumption, optimizing the energy efficiency of the overall system.

[0091] The preheating light box further includes a lifting mechanism for driving the heating mechanism to move up and down, the lifting mechanism including a support frame and a driving unit provided on the support frame, wherein:

[0092] The heating mechanism is slidably connected to the support frame and is transmission-connected to a driving unit arranged on the support frame. The driving unit is used for driving the heating mechanism to slide and rise and fall along the support frame.

[0093] The driving unit is responsible for providing power to enable the heating mechanism to slide and rise and fall along the support frame. The driving unit can be an electric motor, a pneumatic cylinder or a hydraulic cylinder.

[0094] The lifting mechanism enables the heating mechanism to move up and down according to actual needs, providing flexible adjustment of the heating position, which helps to adapt to different heating needs and improve the applicability of the equipment.

[0095] In a second aspect, the present application further proposes a cell welding device, which includes a welding conveying mechanism, a heat curing light box, and the above-mentioned preheating light box;

[0096] The conveying path of the welding conveyor mechanism is provided with a preheating station and a serial connection station in sequence. The welding conveyor mechanism is used to convey the battery cells and welding ribbons laid out according to the predetermined stringing rules;

[0097] The preheating light box is set at the preheating station, and is used to preheat the battery cells and solder strips that are laid out according to a predetermined string rule at the preheating station;

[0098] The heat curing light box is set at the serial connection station, and is configured to heat the preheated battery cells and welding strips located at the serial connection station, so that the welding strips are cured on the battery cells after being heated.

[0099] Among them, the welding conveying mechanism includes a conveyor belt, a roller and a driving device; the conveyor belt is used to carry the battery cells and welding ribbons, and the roller and driving device are responsible for driving the movement of the conveyor belt.

[0100] Through the two-stage heating treatment of preheating and thermal curing, the adhesion quality of the solder ribbon on the battery cell can be effectively improved, ensuring the strength and stability of the solder joint; in addition, stable preheating and curing temperature control can ensure consistent welding quality between each batch of battery cells and solder ribbons, reducing variability and defect rate in the production process.

[0101] The automated welding conveying mechanism can improve the operating efficiency of the production line, reduce manual intervention and operation time, and achieve efficient battery cell welding production.

[0102] The conveying path of the welding conveyor mechanism is also provided with a stacking station located in front of the preheating station. The battery cell welding device also includes a battery cell laying mechanism and a welding ribbon laying mechanism;

[0103] The cell placement mechanism and the solder ribbon placement mechanism are configured to place the cell and solder ribbon at the stacking station according to a predetermined stringing rule;

[0104] The stacking station is the precursor to the cell welding process, preparing for the preheating and welding process.

[0105] The automated operation of the cell placement mechanism and the solder ribbon placement mechanism can significantly improve the speed and efficiency of cell and ribbon placement. The setting of the stacking station ensures that the cell and ribbon are stacked according to predetermined rules, thereby improving the accuracy and consistency of the materials and reducing errors caused by human operation.

[0106] The cell welding device also includes an exhaust mechanism, which is installed on at least one of the thermal curing light box, the preheating light box, and the welding conveying mechanism. The exhaust mechanism is used to exhaust the preheating station and / or the serial connection station.

[0107] Among them, the exhaust mechanism can adopt industrial vacuum cleaners, fans, gas purification devices, exhaust pipes, etc.; if an exhaust pipe is used, the exhaust pipe needs to be connected to the exhaust fan to extract the gas from the preheating station and / or the serial connection station to the centralized processing system.

[0108] The exhaust mechanism can extract the waste gas generated during the heating process and assist in cooling, thereby improving the working environment and protecting the health of the operators. Moreover, through the negative pressure effect of the exhaust mechanism, the air flow in the heating area can be reduced, thereby improving the heating efficiency.

[0109] The present application has been described above in sufficient detail with certain specificity. Those skilled in the art will understand that the descriptions in the examples are merely illustrative, and that all modifications made without departing from the true spirit and scope of the present application are intended to be within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the description in the examples.

Claims

1. A preheating light box, characterized in that, The preheating light box includes a heating mechanism and an air supply mechanism, wherein: The heating mechanism includes a heating chamber and a heating component arranged in the heating chamber; The air supply mechanism includes at least one flow amplifier installed outside the heating chamber, the air inlet of the flow amplifier is connected to the outside air, and the air outlet of the flow amplifier is connected to the heating chamber; The flow amplifier is configured to blow air into the heating chamber, and the air is blown out from a downward side of the heating chamber.

2. The preheating light box according to claim 1, characterized in that: The heating chamber is also provided with a flow guide component, which includes at least one flow guide plate. The flow guide plate is arranged on the air supply path between the air outlet of the flow amplifier and the heating component to guide the air flow to be evenly distributed in the heating chamber.

3. The preheating light box according to claim 2, characterized in that: The guide assembly includes a first guide plate and a second guide plate that are spaced apart, wherein: The first guide plate is provided with a plurality of first waist holes, and the second guide plate is provided with a plurality of second waist holes. The extension direction of the first waist holes is perpendicular to the extension direction of the second waist holes.

4. The preheating light box according to claim 1, characterized in that: The heating assembly includes a plurality of infrared lamp tubes, and a corresponding number of cooling tubes are arranged on the sides of the plurality of infrared lamp tubes. The cooling tubes are provided with a plurality of blowing holes on the side facing the infrared lamp tubes, and the cooling tubes are used to blow air to the infrared lamp tubes.

5. The preheating light box according to claim 1, characterized in that: The heating mechanism also includes a heat insulation plate arranged around the heating component.

6. The preheating light box according to claim 1, characterized in that: The flow amplifier includes an air supply pipe, a nozzle and an air injection unit, wherein: The diameter of the air supply pipe is larger than that of the nozzle, and the air outlet of the air supply pipe is connected to the heating chamber; The air inlet end of the nozzle is connected to the air injection unit, and the air outlet end of the nozzle extends into the air inlet of the air supply pipe. The air injection unit pressurizes the external air into the nozzle; The nozzle is configured to inject high-pressure airflow into the air inlet of the air supply pipe to form a low-pressure area at the air outlet end of the nozzle, so that the air around the air inlet of the air supply pipe is sucked into the air supply pipe due to the pressure difference.

7. The preheating light box according to claim 1, characterized in that: The preheating lamp box further includes a lifting mechanism for driving the heating mechanism to move up and down, the lifting mechanism including a support frame and a driving unit provided on the support frame, wherein: The heating mechanism is slidably connected to the support frame and is transmission-connected to the driving unit provided on the support frame. The driving unit is used for driving the heating mechanism to slide and rise and fall along the support frame.

8. A battery cell welding device, characterized in that: The cell welding device comprises a welding conveying mechanism, a heat curing light box and the preheating light box according to any one of claims 1 to 7; The conveying path of the welding conveyor mechanism is sequentially provided with a preheating station and a serial connection station, and the welding conveyor mechanism is used to convey the battery cells and welding ribbons laid out according to a predetermined stringing rule; The preheating light box is arranged at the preheating station, and is used to preheat the battery cells and solder strips arranged according to a predetermined string rule at the preheating station; The heat curing light box is arranged at the serial connection station, and is configured to heat the preheated battery cells and solder strips located at the serial connection station, so that the solder strips are cured onto the battery cells after being heated.

9. The battery cell welding device according to claim 8, characterized in that: The conveying path of the welding conveyor mechanism is further provided with a stacking station located in front of the preheating station, and the cell welding device further includes a cell laying mechanism and a welding ribbon laying mechanism; The cell placement mechanism and the solder ribbon placement mechanism are configured to place the cell and solder ribbon on the stacking station according to the predetermined stringing rule.

10. The battery cell welding device according to claim 8, characterized in that: The battery cell welding device also includes an exhaust mechanism, which is installed on at least one of the thermal curing light box, the preheating light box, and the welding conveying mechanism. The exhaust mechanism is used to exhaust the preheating station and / or the serial connection station.

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