Topcon battery sintering device and use method thereof

Abstract

The invention discloses a topcon battery sintering device and method, and relates to the technical field of solar battery production, the topcon battery sintering device comprises a conveying frame, a sintering furnace body, an electric heating tube and a cleaning structure, and a conveying motor is installed on the conveying frame to drive battery pieces to be conveyed; the sintering furnace body is provided with an electric heating tube for heating and is connected with the conveying frame through a supporting block, a locking screw rod and the like; the cleaning structure comprises an air inlet part and a slag removal part, dust and impurities in the electric heating tube can be cleaned, discharged and collected, and the using method comprises the steps of equipment inspection, operation starting, sintering and cleaning operation, temperature monitoring and calibration, follow-up cleaning and maintenance and the like. The sintering quality is guaranteed through multi-point temperature monitoring and calibration, the sintering efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell production, and in particular to a topcon cell sintering device and a method for using the same. Background Art

[0002] TOPCon cells, or tunneling oxide passivation contact cells, are an N-type silicon wafer cell technology. TOPCon cells use N-type silicon as a substrate, prepare an ultra-thin layer of silicon oxide on the back of the cell, and then deposit a thin layer of doped polysilicon, the two together forming a passivation contact structure.

[0003] In existing documents, for example, the publication number CN107328246A discloses an exhaust device for a battery cell sintering furnace, including a vertical exhaust duct, a movable block, and a main exhaust fan. A movable block is movably provided in the mounting groove, and a lower plug-in plate and an upper plug-in plate are fixed on the movable block, respectively, and an air outlet hole is provided in the upper plug-in plate, and a main exhaust fan is provided in the vertical exhaust duct. The present invention also discloses a sintering furnace, including the above-mentioned battery cell sintering furnace exhaust device, a furnace body, and an exhaust gas exhaust pipe connected to the furnace body, the exhaust gas exhaust pipe is plugged into the plug-in pipe of the battery cell sintering furnace exhaust device, and a deposition plate is fixed to the outer wall of the ventilation pipe. The present invention can effectively reduce the length of the exhaust pipe and save materials while effectively preventing organic matter from flowing back into the sintering furnace. It can also simply and effectively adjust the exhaust flow rate, solving the problem that the exhaust flow rate can only be adjusted by the power of the exhaust fan.

[0004] Based on the search of the above patents and combined with the equipment in the prior art, it was found that in the traditional TOPCon battery sintering device, the electric heating tubes are prone to accumulate dust and impurities after long-term use, which will seriously affect the sintering efficiency and battery quality. The previous cleaning method often relies on manual regular shutdown and cleaning, which not only consumes a lot of time and manpower costs, but may also cause equipment wear and incomplete cleaning. In addition, the previous sintering device temperature monitoring system has many shortcomings, such as limited detection points, which makes the monitoring data unable to accurately reflect the overall temperature distribution in the furnace, and the temperature control accuracy is not high. The detection probe in the sintering furnace environment for a long time may have detection errors. If it cannot be calibrated in time, it will further affect the accuracy of the sintering temperature, and thus have an adverse effect on the sintering quality of the battery. Summary of the Invention

[0005] The purpose of the present invention is to provide a topcon battery sintering device and a method for using the same, to solve the following technical problems: In traditional TOPCon battery sintering devices, electric heating tubes are prone to accumulate dust and impurities after long-term use, which will seriously affect the sintering efficiency and battery quality. Previous cleaning methods often rely on manual regular shutdown and cleaning, which not only consumes a lot of time and manpower costs, but may also cause equipment wear and incomplete cleaning. In addition, the previous sintering device temperature monitoring system has many shortcomings, such as limited detection points, which result in the monitoring data being unable to accurately reflect the overall temperature distribution in the furnace, the temperature control accuracy is not high, and the detection probe in the sintering furnace environment for a long time may have detection errors. If it cannot be calibrated in time, it will further affect the accuracy of the sintering temperature, and thus have an adverse effect on the sintering quality of the battery.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A topcon battery sintering device comprises a conveyor frame, a sintering furnace body being mounted on the top side of the middle portion of the conveyor frame, a mounting groove being formed on one inner wall of the sintering furnace body, a support block being fitted in the mounting groove, a connecting buckle being fixed to the outer side of the support block, and a mounting screw hole being formed on the outer side wall of the sintering furnace body, one end of a locking screw being screwed into the mounting screw hole, and the connecting buckle being fitted to the outer side of the conveyor frame via the locking screw;

[0008] Mounting seats are installed on the opposite sides of the sintering furnace body and the support block, and an electric heating pipe is installed between the two mounting seats;

[0009] A cleaning structure is installed on the electric heating tube, and the cleaning structure is divided into an air intake structure and a slag cleaning structure. The slag cleaning structure includes a movable plate, a movable hole is opened in the middle of the movable plate, and the electric heating tube is located in the movable hole. Cleaning annular knives are respectively provided on both sides of the movable plate. The cleaning annular knives are arranged on the periphery of the electric heating tube to perform sliding cleaning operations on the electric heating tube.

[0010] As a further solution of the present invention: the slag cleaning structure further includes a slag discharge pipe and an air inlet cylinder, and the movable plate further has two mounting holes, and the two mounting holes are respectively located on both sides of the movable hole, and the slag discharge pipe and the air inlet cylinder are respectively installed in the two mounting holes;

[0011] A connecting plate and a protective cover are connected between the slag discharge pipe and the air inlet cylinder, and the connecting plate and the protective cover are provided with an aperture for the electric heating pipe to pass through;

[0012] A driving bevel gear is rotatably mounted inside the slag discharge pipe, a partition plate is fixed at an equal angle on the circumferential surface of the driving bevel gear, and a rotating bevel gear is fixed at one end of the driving bevel gear;

[0013] A slag inlet is provided on the circumferential surface of the slag discharge pipe, and an air blast port is provided on the circumferential wall of the air inlet cylinder. The air blast port and the slag inlet are arranged along the same straight line, and both the slag inlet and the air blast port are located above the connecting plate.

[0014] The movable plate is fixed to the bottom side of the furnace cover, and a flip motor is installed on the top side of the furnace cover. A transmission shaft is installed on the output shaft of the flip motor, and a drive shaft is installed at the bottom end of the transmission shaft. The drive shaft is vertically meshed with the rotating bevel gear.

[0015] As a further solution of the present invention: the air intake structure includes a draft fan, which is installed on a side wall of the sintering furnace body and is connected to the chamber cavity of the sintering furnace body. The draft fan is connected to an air intake main pipe, and the air intake main pipe is connected to a second diversion air pipe. An air intake hole is opened at one end of the air intake cylinder, and the other end of the second diversion air pipe is connected to the air intake hole of the air intake cylinder, which can collect the ash and impurities generated by cleaning through air intake.

[0016] As a further solution of the present invention: slag cleaning holes are synchronously opened at both ends of the slag discharge pipe, one of the slag cleaning holes is connected to the middle part of the second diversion air pipe through a diversion pipe, and a sliding buckle is installed on the bottom side of the connecting plate, and a collection box is slidably assembled in the sliding buckle, wherein the sliding buckle and the collection box are synchronously opened with guide holes, when the sliding buckle is combined with the collection box, the two guide holes are aligned, and the guide hole on the sliding buckle is connected to the other slag cleaning hole on the slag discharge pipe through a guide pipe.

[0017] As a further solution of the present invention: a screw hole is provided on the movable plate, a reciprocating motor is installed on one side outer wall of the sintering furnace body, a reciprocating screw is assembled on the output shaft of the reciprocating motor, and the reciprocating screw rotates through the screw hole in the movable plate, which can cooperate to realize the movement of the cleaning component and realize the cleaning and maintenance of the electric heating tube.

[0018] As a further solution of the present invention: an L-shaped matching isolation plate is fixed to the bottom side of the connecting plate, and a movable detection probe is installed on the bottom side of the matching isolation plate. A temperature control calibration structure is installed on one side of the sintering furnace body. The temperature control calibration structure includes an isolation frame. A movable hole is opened on the side wall of the sintering furnace body. The chamber of the isolation frame is aligned with the movable hole. The isolation frame is fixed to the inner side of the sintering furnace body. A calibration detection head is installed on the top hole wall of the movable hole of the sintering furnace body. An L-shaped opening is opened on the isolation frame, and the opening on the isolation frame is arranged corresponding to the matching isolation plate.

[0019] As a further solution of the present invention: a sliding block is slidingly arranged in the movable hole, an extrusion plate and a sliding rod are fixed to one end of the sliding block respectively, a socket is provided on the bottom side wall of the isolation frame, the sliding rod is arranged through the socket, a limiting cap is provided at the end of the sliding rod, a spring is fixed between the limiting cap and the outer side wall of the isolation frame, the extrusion plate is located in the L-shaped opening, and a calibration detection head is fixed to the other end of the sliding block, and the calibration detection head is used for sealing the movable hole.

[0020] As a further solution of the present invention: a control box is installed on the outside of the sintering furnace body, and the control box is used for conveying motors, induced draft fans, reciprocating motors, and start and stop control of reciprocating motors, and can synchronously control multiple reciprocating motors and the synchronous operation of multiple reciprocating motors. The control box is used to receive temperature detection data from active detection probes and calibration detection heads, and can cooperate to realize the detection of temperature movement in the cavity during the sintering process, and at the same time pass self-test to ensure the accuracy of the detection data.

[0021] As a further solution of the present invention: the conveying frame has rotating roller shafts at both ends, conveying rollers are installed on the outer sides of the roller shafts, and the outer sides of the two conveying rollers are equipped with wire meshes. A conveying motor is installed on the outer side of one end of the conveying frame, and the output shaft of the conveying motor is connected to one of the roller shafts through a coupling, and the conveying motor is used to drive one of the roller shafts;

[0022] A method for using a topcon battery sintering device, the operating steps comprising:

[0023] S1: Check the appearance and connection of the equipment: comprehensively check whether the conveyor frame, sintering furnace body and other components of the sintering device are damaged, confirm that the connection parts between the support block and the sintering furnace body, conveyor frame and other components are fastened, and ensure that the locking screws are tightened; at the same time, check the installation of the cleaning structure and air intake structure components and the connection of the pipelines; check the installation of the temperature control and calibration structure components to ensure that the movable detection probe and calibration detection head can move normally; check the correctness of the power connection and the firmness of the electrical connection between the control box and each motor;

[0024] Confirm that the temperature detection system is ready, check whether the active detection probe and calibration detection head are installed in the correct position to ensure that they can sense the temperature normally and there is no obstruction or interference. Confirm that the signal transmission line between the control box and the temperature detection probe is connected normally without looseness, breakage or short circuit to ensure that the temperature data can be accurately and stably transmitted to the control box;

[0025] S2: Turn on the main power of the equipment and turn on the power switch of the control box. The control box is powered on and starts. At this time, the control box starts to initialize and prepares to receive and process various signals. The conveying motor is started through the control box. The motor drives the roller shaft to rotate, so that the conveying roller and the wire mesh start to operate and prepare for the conveying of the battery cells. The reciprocating motors on both sides of the sintering furnace body are started. The reciprocating motors drive the reciprocating screws to rotate, so that the movable plate moves horizontally in the sintering furnace body. The furnace cover plate moves horizontally synchronously to achieve protection inside the sintering furnace body cavity.

[0026] S3: During the cell sintering process, the topcon cells to be sintered are placed on the wire mesh at one end of the conveyor rack. Driven by the conveyor motor, the wire mesh drives the cells to move into the sintering furnace. After the cells enter the sintering furnace, the electric heating tubes begin to heat. According to the preset sintering process curve, the electric heating tubes gradually increase the temperature to the temperature range required for sintering. The battery sintering temperature is between 800°C and 900°C. The control box monitors the temperature of the electric heating tubes in real time and accurately controls the sintering temperature by adjusting the power of the electric heating tubes to ensure that the cells are sintered at the appropriate temperature.

[0027] During the cleaning of the electric heating tube, the movable plate slides along the electric heating tube driven by the reciprocating motor, and the cleaning ring knife slides around the outer periphery of the electric heating tube to remove accumulated dust and impurities, thus ensuring the heating efficiency and radiation uniformity of the electric heating tube.

[0028] Dust cleaning and gas circulation: the cleaned dust falls into the space formed by the air inlet and the protective cover; the induced draft fan is started, which transports the excess hot air in the sintering furnace body through the air inlet main pipe to the second branch air pipe, and then into the air inlet cylinder; the hot air is ejected from the tuyere, bringing the dust gas into the slag discharge pipe, and the dust is discharged and introduced into the collection box through the rotation of the partition plate and the blowing of the gas. The gas is filtered in the collection box and then flows back. At the same time, the electric heating tube reheats the gas, improving the gas flow and heat diffusion effect in the furnace;

[0029] S4: Temperature monitoring and calibration; sintering process temperature monitoring. During the sintering process, the connecting plate drives the movable detection probe to move horizontally in the sintering furnace to achieve multi-point temperature monitoring. The movable detection probe sends temperature data to the control box at regular intervals. The control box displays the temperature change curves at different positions in the furnace in real time, so that the operator can intuitively understand the sintering temperature. When the temperature in the furnace is lower than or higher than the set sintering temperature range, the control box will issue an alarm. The operator can adjust the heating power of the electric heating tube according to the actual situation to ensure that the sintering process is carried out under the optimal temperature conditions.

[0030] Active detection probe calibration: When calibration is required, as the cleaning component moves, the isolation plate is brought close to the isolation frame, and the isolation plate is snapped into the joint. The bottom of the isolation plate pushes the extrusion plate, the sliding block is pushed out, the protective plate is separated from the active hole, and the calibration detection head and the active detection probe are placed in the external air at the same time;

[0031] The calibration detection head and the activity detection probe simultaneously detect the temperature and transmit the data to the control box. The control box compares the two sets of temperature data. If the deviation between the detection temperature of the activity detection probe and the standard temperature of the calibration detection head exceeds the allowable range, it is determined that the activity detection probe needs to be calibrated or replaced. This comparison self-test ensures the accuracy of the activity detection probe.

[0032] After calibration, work is resumed. After calibration is completed, the isolation plate is separated from the isolation frame, the spring pushes the sliding block to reset, and the protective plate re-closes the movable hole to reduce the temperature loss of the sintering furnace chamber. The movable detection probe continues to perform multi-point detection of the temperature in the sintering furnace chamber to provide accurate temperature data support for the sintering process.

[0033] S5; Follow-up work: Clean the collection box, pull out the collection box, clean the dust and impurities, and ensure it is clean for next use;

[0034] Equipment maintenance inspection and temperature data recording; regular and comprehensive inspection of equipment and maintenance of parts; recording the temperature data of this sintering, including the sintering temperature set value, actual temperature curve, temperature changes at each monitoring point, analysis of the sintering process, optimization of temperature control parameters, and improvement of topcon battery sintering quality.

[0035] Beneficial effects of the present invention:

[0036] The cooperation of the conveying motor, roller, conveying roller and wire mesh realizes the stable conveying of the battery cells. At the same time, the electric heating tube sintering the battery cells, and the reciprocating motor drives the movable plate to move horizontally in the sintering furnace body. The furnace cover and the sintering furnace body cooperate to realize the protection of the furnace cavity, thus ensuring the sintering environment of the battery cells in many aspects and improving the sintering efficiency and quality.

[0037] During the movement of the cleaning structure on the movable plate, the cleaning ring knife cleans the dust and impurities accumulated on the electric heating tube. The cleaned impurities fall into a specific space. Through the cooperation of the induced draft fan, the air intake main pipe, the second branch air pipe, etc., gas is blown in, so that the dust is discharged in the slag discharge pipe and filtered by the collection box, thereby realizing automatic cleaning and maintenance of the electric heating tube, maintaining the sintering efficiency and quality inside the sintering furnace, reducing external maintenance losses, and saving costs.

[0038] Through the coordination of structures such as slag cleaning holes, slag discharge pipes, collection boxes and guide holes, the gas circulates in the furnace. The secondary heating of the electric heating tube improves the gas flow effect and heat flow diffusion effect in the furnace, promotes uniform temperature distribution in the furnace, and provides a more stable thermal environment for battery cell sintering.

[0039] By moving the movable detection probe on the connecting plate horizontally within the sintering furnace, multi-point monitoring is achieved, improving the accuracy of detection data. In conjunction with the isolation plate and isolation frame, the calibration detection head and the movable detection probe perform simultaneous detection and comparison, calibrating the accuracy of the movable detection probe, and then precisely controlling the operating power of the electric heating tube to achieve better sintering results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] Figure 1 It is a schematic diagram of the overall first three-dimensional structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the overall second three-dimensional structure of the present invention;

[0043] Figure 3 It is a schematic diagram of the internal structure of the sintering furnace body of the present invention;

[0044] Figure 4 It is a schematic diagram of the position structure of the reciprocating screw rod in the present invention;

[0045] Figure 5 This is a schematic diagram of the position structure of the temperature control calibration structure inside the sintering furnace body in the present invention;

[0046] Figure 6 This is a schematic diagram showing the installation position of the activity detection probe in the present invention;

[0047] Figure 7 It is a three-dimensional schematic diagram of the cleaning structure of the present invention;

[0048] Figure 8 This is a structural diagram of the cleaning annular knife in the present invention;

[0049] Figure 9 It is a cross-sectional structural diagram of the cleaning structure in the present invention;

[0050] Figure 10 This is a schematic diagram of the installation of the collection box in the cleaning structure of the present invention;

[0051] Figure 11 It is a temperature control calibration structure diagram of the present invention;

[0052] In the figure: 1. conveying frame, 2. sintering furnace body, 3. roller, 4. screen, 5. conveying roller, 6. control box, 7. cleaning structure, 8. air intake pipe, 9. furnace cover, 10. conveying motor, 11. air induction fan, 12. temperature control calibration structure, 13. mounting base, 14. electric heating pipe, 15. connecting buckle, 16. locking screw, 17. support block, 18. movable detection probe, 19. matching isolation plate, 20. reciprocating motor, 21. reciprocating screw, 71. air intake cylinder, 72. second diversion air pipe, 73. movable plate, 74 , slag discharge pipe, 75, air inlet, 76, rotating bevel gear, 77, driving shaft, 78, driving bevel gear, 79, protective cover, 710, transmission shaft, 711, cleaning ring knife, 712, sliding buckle, 713, collecting box, 714, slag inlet, 715, connecting plate, 716, blast port, 717, partition plate, 718, flip motor, 121, protective plate, 122, calibration detection head, 123, sliding block, 124, spring, 125, slide rod, 126, extrusion plate, 127, isolation frame, 128, splicing interface. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 any creative efforts shall fall within the scope of protection of the present invention.

[0054] Example 1

[0055] See also Figure 1-3 As shown, the present invention is a topcon battery sintering device, comprising a conveyor frame 1, a sintering furnace body 2 is mounted on the top side of the middle portion of the conveyor frame 1, a mounting groove is provided on one inner wall of the sintering furnace body 2, a support block 17 is fitted in the mounting groove, a connecting buckle 15 is fixed to the outer side of the support block 17, and a mounting screw hole is provided on the outer side wall of the sintering furnace body 2, one end of a locking screw 16 is screwed into the mounting screw hole, and the connecting buckle 15 is fitted to the outer side of the conveyor frame 1 through the locking screw 16;

[0056] Mounting seats 13 are installed on the opposite sides of the sintering furnace body 2 and the support block 17, and an electric heating pipe 14 is installed between the two mounting seats 13;

[0057] See also Figure 8-9As shown, a cleaning structure is installed on the electric heating tube 14. The cleaning structure is divided into an air intake structure and a slag cleaning structure. The slag cleaning structure includes a movable plate 73. A movable hole is opened in the middle of the movable plate 73. The electric heating tube 14 is located in the movable hole. Cleaning annular knives 711 are respectively provided on both sides of the movable plate 73. The cleaning annular knives 711 are arranged on the periphery of the electric heating tube 14 to perform sliding cleaning operations on the electric heating tube 14.

[0058] The slag cleaning structure further includes a slag discharge pipe 74 and an air inlet cylinder 71. The movable plate 73 further has two mounting holes, and the two mounting holes are respectively located on both sides of the movable hole. The slag discharge pipe 74 and the air inlet cylinder 71 are respectively installed in the two mounting holes.

[0059] See also Figure 7 As shown, a connecting plate 715 and a protective cover 79 are connected between the slag discharge pipe 74 and the air inlet cylinder 71. The protective cover 79 is provided with an aperture for the electric heating pipe 14 to pass through;

[0060] A driving bevel gear 78 is rotatably mounted inside the slag discharge pipe 74 , a partition plate 717 is fixed at an equal angle on the circumferential surface of the driving bevel gear 78 , and a rotating bevel gear 76 is fixed at one end of the driving bevel gear 78 ;

[0061] A slag inlet 714 is provided on the circumferential surface of the slag discharge pipe 74 , and a blast port 716 is provided on the circumferential wall of the air inlet cylinder 71 . The blast port 716 and the slag inlet 714 are arranged along the same straight line, and both the slag inlet 714 and the blast port 716 are located above the connecting plate 715 .

[0062] See also Figure 7 As shown, the movable plate 73 is fixed on the bottom side of the furnace cover 9, and a flip motor 71 is installed on the top side of the furnace cover 9. A transmission shaft 710 is installed on the output shaft of the flip motor 71, and a drive shaft 77 is installed at the bottom end of the transmission shaft 710. The drive shaft 77 is vertically meshed with the rotating bevel gear 76.

[0063] See also Figure 2 、 Figure 7 As shown, the air intake structure includes a draft fan 11, which is installed on a side wall of the sintering furnace body 2, and the draft fan 11 is connected to the chamber cavity of the sintering furnace body 2. The draft fan 11 is connected to an air intake main pipe 8, and the air intake main pipe 8 is connected to a second branch air pipe 72. An air intake hole 75 is opened at one end of the air intake cylinder 71, and the other end of the second branch air pipe 72 is connected to the air intake hole 75 of the air intake cylinder 71.

[0064] Slag cleaning holes are synchronously opened at both ends of the slag discharge pipe 74, one of the slag cleaning holes is connected to the middle part of the second diversion air pipe 72 through a diversion pipe, and a sliding buckle 712 is installed on the bottom side of the connecting plate 715, and a collection box 713 is slidably assembled in the sliding buckle 712, wherein the sliding buckle 712 and the collection box 713 are synchronously opened with guide holes. When the sliding buckle 712 is combined with the collection box 713, the two guide holes are aligned, and the guide hole on the sliding buckle 712 is connected to the other slag cleaning hole on the slag discharge pipe 74 through a guide pipe.

[0065] The movable plate 73 is provided with a screw hole. A reciprocating motor 20 is mounted on an outer wall of one side of the sintering furnace body 2 . A reciprocating screw 21 is mounted on the output shaft of the reciprocating motor 20 . The reciprocating screw 21 rotates through the screw hole in the movable plate 73 .

[0066] When sintering the topcon battery, in order to better adjust the sintering of the battery, during the sintering process of the battery cell, the conveying motor 10 operates to drive the roller shaft 3 to rotate. With the cooperation of the two conveying rollers 5, the screen 4 can be rotated to realize the conveying of the battery cell. When the battery cell is sintered through the electric heating tube 14, during the sintering process, the reciprocating motor 20 operates to drive the reciprocating screw 21 to rotate, so as to realize the horizontal movement of the movable plate 73 in the sintering furnace body 2. During the movement of the movable plate 73, the furnace cover plate 9 moves horizontally and cooperates with the sintering furnace body 2 to realize the protection of the cavity of the sintering furnace body 2.

[0067] When the movable plate 73 slides along the electric heating tube 14, with the cooperation of the cleaning annular knife 711, the dust and impurities accumulated on the electric heating tube 14 can be cleaned during the reciprocating movement;

[0068] The cleaned impurities and dust fall into the space formed by the air inlet 75 and the protective cover 79. When the impurities and dust are cleaned, the exhaust fan 11 can be used to drain the excess hot air inside the chamber of the sintering furnace body 2. With the cooperation of the air inlet main pipe 8, the hot air can be transported to the second branch air pipe 72. The hot air is transported to the inside of the air inlet cylinder 71 through the second branch air pipe 72. The hot air inside the air inlet cylinder 71 is transported to the chamber formed by the connecting plate 715 and the protective cover 79 through the blast port 716. The gas ejected through the blast port 716 enters the slag inlet 714 through the blast port 716.

[0069] When the dust enters the space formed by the two partition plates 717, and the partition plates 717 are provided with filter holes for gas to pass through, when the dust gas enters the slag inlet 714, the partition plates 717 are operated at this time, driving the transmission shaft 710 to rotate, realizing the rotation of the drive shaft 77, and with the rotation cooperation of the rotating bevel gear 76, it can drive the driving bevel gear 78 to rotate, thereby realizing the rotation of the partition plate 717. During the rotation of the partition plate 717, the dust can be carried and rotated. After the dust chamber rotates to the position connected to the air inlet 75, the blowing gas in the second diversion air pipe 72 is diverted through the diversion pipe into the dust chamber. In the chamber cavity, under the action of horizontal blowing, the dust is ejected in a straight line, and the dust gas is discharged through the slag discharge pipe 74, and the dust gas is introduced into the collection box 713 through the slag cleaning hole. After being filtered by the collection box 713, the reflux gas is discharged, and the inner chamber cavity of the sintering furnace body 2 can be heated under the secondary heating of the electric heating tube 14, which can improve the gas flow effect in the sintering furnace and the heat flow diffusion effect. At the same time, through the cooperation of the mobile cleaning structure and the air intake structure, the daily cleaning and maintenance of the electric heating tube 14 can be achieved, which can effectively maintain the sintering efficiency inside the sintering furnace, ensure the sintering quality, reduce the loss of external maintenance, and save costs.

[0070] Example 2

[0071] See also Figure 4-5 、 Figure 11 As shown, an L-shaped matching isolation plate 19 is fixed to the bottom side of the connecting plate 715, and a movable detection probe 18 is installed on the bottom side of the matching isolation plate 19. A temperature control calibration structure 12 is installed on one side of the sintering furnace body 2. The temperature control calibration structure 12 includes an isolation frame 127. A movable hole is provided on the side wall of the sintering furnace body 2. The chamber of the isolation frame 127 is aligned with the movable hole. The isolation frame 127 is fixed to the inner side of the sintering furnace body 2. A calibration detection head 122 is installed on the top hole wall of the movable hole of the sintering furnace body 2. An L-shaped opening is provided on the isolation frame 127, and the opening on the isolation frame 127 is arranged corresponding to the matching isolation plate 19.

[0072] A sliding block 123 is slidably provided in the movable hole, and an extrusion plate 126 and a slide rod 125 are fixed to one end of the sliding block 123 respectively. A socket is provided on the bottom side wall of the isolation frame 127, and the slide rod 125 is provided through the socket. A limit cap is provided at the end of the slide rod 125, and a spring 124 is fixed between the limit cap and the outer side wall of the isolation frame 127. The extrusion plate 126 is located in the L-shaped opening. A calibration detection head 122 is fixed to the other end of the sliding block 123, and the calibration detection head 122 is used to seal the movable hole;

[0073] During the sintering process, in order to better monitor the sintering temperature in the sintering furnace and to better regulate the temperature in the furnace, the movable detection probe 18 is driven to move horizontally in the sintering furnace during the movement of the connecting plate 715, so as to achieve multi-point monitoring, more monitoring points and more accurate detection data;

[0074] When calibrating the active detection probe 18, as the connecting plate 715 in the cleaning assembly moves, when the matching isolation plate 19 is close to the isolation frame 127, the matching isolation plate 19 is stuck in the joint 128. At this time, the bottom of the matching isolation plate 19 acts on the extrusion plate 126 to push the sliding block 123 out, so that the protective plate 121 can be separated from the active hole. Under the combination of the isolation frame 127 and the matching isolation plate 19, the calibration detection head 122 and the active detection probe 18 are simultaneously located in the external air. The calibration detection head 122 and the active detection probe 18 are used for synchronous detection. The temperature comparison of the calibration detection head 122 and the active detection probe 18 is used to judge the accuracy of the detection of the active detection probe 18 that has been wandering in the chamber of the sintering furnace body 2 for a long time. The calibration detection head 122 and the active detection probe 18 are GD700 series thermocouple probes.

[0075] After the isolation plate 19 is combined with the isolation frame 127, the extrusion plate 126 is pushed and the synchronous slide rod 125 is also pulled to compress the spring 124. When the temperature in the chamber of the sintering furnace body 2 is subsequently detected by the active detection probe 18, the spring 124 expands, driving the sliding block 123 to reset, so that the protective plate 121 closes the active hole, reducing the temperature loss in the sintering chamber of the sintering furnace body 2. Through comparative self-inspection, the accuracy of temperature detection can be guaranteed. During the active detection process, multi-point detection can be achieved to improve the accuracy of detection, and the operating power of the electric heating tube 14 can be adjusted to achieve better sintering effect.

[0076] A control box 6 is installed on the outside of the sintering furnace body 2. The control box 6 is used to control the start and stop of the conveying motor 10, the induced draft fan 11, the reciprocating motor 20, and the flipping motor 718, and can synchronously control the synchronous operation of multiple reciprocating motors 20 and multiple flipping motors 718. The control box 6 is used to receive temperature detection data from the active detection probe 18 and the calibration detection head 122.

[0077] The conveying frame 1 has rotating rollers 3 at both ends, and conveying rollers 5 are installed on the outside of the rollers 3. The outsides of the two conveying rollers 5 are equipped with screens 4. A conveying motor 10 is installed on the outside of one end of the conveying frame 1. The output shaft of the conveying motor 10 is connected to one of the rollers 3 through a coupling. The conveying motor 10 is used to drive one of the rollers 3. During the sintering process of the battery cells, the conveying motor 10 operates to drive the rollers 3 to rotate. With the cooperation of the two conveying rollers 5, the screen 4 can be rotated to realize the conveying of the battery cells.

[0078] Working principle: When sintering the topcon battery, in order to better adjust the sintering of the battery, during the sintering process of the battery cell, the conveying motor 10 operates to drive the roller 3 to rotate. With the cooperation of the two conveying rollers 5, the screen 4 can be rotated to realize the conveying of the battery cell. When the battery cell is sintered through the electric heating tube 14, during the sintering process, the reciprocating motor 20 operates to drive the reciprocating screw 21 to rotate, and the movable plate 73 can be moved horizontally in the sintering furnace body 2. During the movement of the movable plate 73, the furnace cover plate 9 moves horizontally and cooperates with the sintering furnace body 2 to realize the protection of the cavity of the sintering furnace body 2.

[0079] When the movable plate 73 slides along the electric heating tube 14, with the cooperation of the cleaning annular knife 711, the dust and impurities accumulated on the electric heating tube 14 can be cleaned during the reciprocating movement;

[0080] The cleaned impurities and dust fall into the space formed by the air inlet 75 and the protective cover 79. When the impurities and dust are cleaned, the exhaust fan 11 can be used to drain the excess hot air inside the chamber of the sintering furnace body 2. With the cooperation of the air inlet main pipe 8, the hot air can be transported to the second branch air pipe 72. The hot air is transported to the inside of the air inlet cylinder 71 through the second branch air pipe 72. The hot air inside the air inlet cylinder 71 is transported to the chamber formed by the connecting plate 715 and the protective cover 79 through the blast port 716. The gas ejected through the blast port 716 enters the slag inlet 714 through the blast port 716.

[0081] When the dust enters the space formed by the two partition plates 717, and the partition plates 717 are provided with filter holes for gas to pass through, when the dust gas enters the slag inlet 714, the partition plates 717 are operated at this time, driving the transmission shaft 710 to rotate, realizing the rotation of the drive shaft 77, and with the rotation cooperation of the rotating bevel gear 76, it can drive the driving bevel gear 78 to rotate, thereby realizing the rotation of the partition plate 717. During the rotation of the partition plate 717, the dust can be carried and rotated. After the dust chamber rotates to the position connected to the air inlet 75, the blowing gas in the second diversion air pipe 72 is diverted through the diversion pipe into the dust chamber. In the chamber cavity, under the action of horizontal blowing, the dust is ejected in a straight line, and the dust gas is discharged through the slag discharge pipe 74, and the dust gas is introduced into the collection box 713 through the slag cleaning hole. After being filtered by the collection box 713, the reflux gas is discharged, and the heating of the inner chamber of the sintering furnace body 2 can be achieved under the secondary heating of the electric heating tube 14, which can improve the gas flow effect in the sintering furnace and the heat flow diffusion effect. At the same time, through the cooperation of the mobile cleaning structure and the air intake structure, the daily cleaning and maintenance of the electric heating tube 14 can be achieved, which can effectively maintain the sintering efficiency inside the sintering furnace, ensure the sintering quality, reduce the loss of external maintenance, and save costs.

[0082] During the sintering process, in order to better monitor the sintering temperature in the sintering furnace and to better regulate the temperature in the furnace, the movable detection probe 18 is driven to move horizontally in the sintering furnace during the movement of the connecting plate 715, so as to achieve multi-point monitoring, more monitoring points and more accurate detection data;

[0083] When calibrating the active detection probe 18, as the connecting plate 715 in the cleaning assembly moves, when the matching isolation plate 19 is close to the isolation frame 127, the matching isolation plate 19 is clamped in the joint 128. At this time, the bottom of the matching isolation plate 19 acts on the extrusion plate 126 to push the sliding block 123 out, so that the protective plate 121 can be separated from the active hole. Under the combination of the isolation frame 127 and the matching isolation plate 19, the calibration detection head 122 and the active detection probe 18 are simultaneously located in the external air. Through the synchronous detection of the calibration detection head 122 and the active detection probe 18, the temperature detected by the calibration detection head 122 and the active detection probe 18 is compared to determine the accuracy of the detection of the active detection probe 18 that has been wandering in the chamber of the sintering furnace body 2 for a long time.

[0084] After the isolation plate 19 is combined with the isolation frame 127, the extrusion plate 126 is pushed and the synchronous slide rod 125 is also pulled to compress the spring 124. When the temperature in the chamber of the sintering furnace body 2 is subsequently detected by the active detection probe 18, the spring 124 expands, driving the sliding block 123 to reset, so that the protective plate 121 closes the active hole, reducing the temperature loss in the sintering chamber of the sintering furnace body 2. Through comparative self-inspection, the accuracy of temperature detection can be guaranteed. During the active detection process, multi-point detection can be achieved to improve the accuracy of detection, and the operating power of the electric heating tube 14 can be adjusted to achieve better sintering effect.

[0085] A method for using a topcon battery sintering device, the operating steps comprising:

[0086] S1: Check the appearance and connection of the device:

[0087] Thoroughly inspect the conveyor frame 1, sintering furnace body 2 and other components of the sintering device for damage, confirm that the connection parts between the support block 17 and the sintering furnace body 2, conveyor frame 1 and other components are tight, and ensure that the locking screw 16 is tightened; at the same time, check the installation of the cleaning structure 7 and the air intake structure components and the pipe connection; check the installation of the temperature control calibration structure 12 components to ensure that the movable detection probe 18 and the calibration detection head 122 can move normally; check the correctness of the power connection and the firmness of the electrical connection between the control box 6 and each motor;

[0088] Confirm that the temperature detection system is ready, check whether the installation position of the active detection probe 18 and the calibration detection head 122 is accurate, and ensure that they can sense the temperature normally without obstruction or interference; confirm that the signal transmission line between the control box 6 and the temperature detection probe is connected normally without looseness, breakage or short circuit, so as to ensure that the temperature data can be accurately and stably transmitted to the control box 6.

[0089] S2: Connect the main power supply to the equipment and turn on the power switch of the control box 6. The control box 6 then begins initialization, preparing to receive and process various signals. The conveyor motor 10 is activated through the control box 6, which drives the roller shaft 3 to rotate, causing the conveyor rollers and screen 4 to begin operating, preparing for cell conveying. The reciprocating motors 20 on both sides of the sintering furnace body 2 are activated. The reciprocating motors 20 rotate the reciprocating screws 21, causing the movable plate 73 to move laterally within the sintering furnace body 2. The furnace cover 9 then moves horizontally and synchronously, providing protection within the sintering furnace body 2.

[0090] S3: Cell sintering process

[0091] The topcon battery cells to be sintered are placed on the wire mesh 4 at one end of the conveyor rack 1. Driven by the conveying motor 10, the wire mesh 4 drives the battery cells to move into the sintering furnace body 2. After the battery cells enter the sintering furnace body 2, the electric heating tube 14 starts to heat. According to the preset sintering process curve, the electric heating tube 14 gradually increases the temperature to the temperature range required for sintering. The battery sintering temperature is between 800℃ and 900℃. The control box 6 will monitor the temperature of the electric heating tube 14 in real time and accurately control the sintering temperature by adjusting the power of the electric heating tube 14 to ensure that the battery cells are sintered at a suitable temperature.

[0092] During the cleaning operation of the electric heating tube 14 , the movable plate 73 slides along the electric heating tube 14 driven by the reciprocating motor 20 , and the cleaning annular knife 711 slides around the outer periphery of the electric heating tube 14 to remove accumulated dust and impurities, thereby ensuring the heating efficiency and radiation uniformity of the electric heating tube 14 .

[0093] Dust cleaning and gas circulation, the cleaned dust falls into the space formed by the air inlet 75 and the protective cover 79; the induced draft fan 11 is started, which transports the excess hot air in the sintering furnace body 2 to the second branch air pipe 72 through the air inlet main pipe 8, and then enters the air inlet cylinder 71. The hot air is ejected from the blast port 716, bringing the dust gas into the slag discharge pipe 74. The dust is discharged through the rotation of the partition plate 717, gas blowing, etc. and introduced into the collection box 713. The gas is filtered by the collection box 731 and refluxes. At the same time, the electric heating tube 14 reheats the gas to improve the gas flow and heat diffusion effect in the furnace.

[0094] S4: Temperature Monitoring and Calibration

[0095] Temperature monitoring during sintering: During the sintering process, the connecting plate 715 drives the movable detection probe 18 to move horizontally in the sintering furnace body 2 to achieve multi-point temperature monitoring. The movable detection probe 18 sends temperature data to the control box 6 at regular intervals. The control box 6 displays the temperature change curves at different positions in the furnace in real time, so that the operator can intuitively understand the sintering temperature. When the temperature in the furnace is lower than or higher than the set sintering temperature range, the control box 6 will issue an alarm. The operator can adjust the heating power of the electric heating tube 14 according to the actual situation to ensure that the sintering process is carried out under the optimal temperature conditions;

[0096] Calibration of the activity detection probe. When calibration is required, as the cleaning component moves, the isolation plate 19 is brought close to the isolation frame 127, and the isolation plate 19 is snapped into the joint 128. Its bottom pushes the extrusion plate 126, and the sliding block 123 is pushed out. The protective plate 121 is separated from the movable hole, and the calibration detection head 122 and the activity detection probe 18 are placed in the external air at the same time. The calibration detection head 122 and the activity detection probe 18 synchronously detect the temperature and transmit the data to the control box 6. The control box 6 compares the two sets of temperature data. If the deviation between the detection temperature of the activity detection probe 18 and the standard temperature of the calibration detection head 122 exceeds the allowable range, it is determined that the activity detection probe 18 needs to be calibrated or replaced. Through this comparative self-test, the accuracy of the activity detection probe 18 is guaranteed.

[0097] After calibration, work is resumed. After calibration is completed, the isolation plate 19 is separated from the isolation frame 127, the spring 124 pushes the sliding block 123 to reset, and the protective plate 121 recloses the movable hole to reduce the temperature loss of the sintering furnace chamber. The movable detection probe 18 continues to perform multi-point detection of the temperature in the sintering furnace chamber to provide accurate temperature data support for the sintering process.

[0098] S5: Follow-up work

[0099] Clean the collection box 713, pull out the collection box 713, clean the dust and impurities, and ensure that it is clean for next use.

[0100] Equipment maintenance inspection and temperature data recording

[0101] Regularly and comprehensively inspect the equipment and perform maintenance on the components; record the temperature data of this sintering, including the sintering temperature set value, actual temperature curve, and temperature changes at each monitoring point; analyze the sintering process, optimize the temperature control parameters, and improve the sintering quality of topcon batteries.

[0102] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A topcon battery sintering device, characterized in that: include: A conveying frame (1), wherein a sintering furnace body (2) is installed on the top side of the middle portion of the conveying frame (1), a mounting groove is provided on the inner wall of one side of the sintering furnace body (2), a support block (17) is fitted in the mounting groove, a connecting buckle (15) is fixed on the outer side of the support block (17), and a mounting screw hole is provided on the outer side wall of the sintering furnace body (2), one end of a locking screw (16) is screwed in the mounting screw hole, and the connecting buckle (15) is fitted on the outer side of the conveying frame (1) through the locking screw (16); Mounting seats (13) are installed on opposite sides of the sintering furnace body (2) and the support block (17), and an electric heating pipe (14) is installed between the two mounting seats (13); The electric heating tube (14) is equipped with a cleaning structure, which is divided into an air intake structure and a slag cleaning structure. The slag cleaning structure includes a movable plate (73). A movable hole is opened in the middle of the movable plate (73). The electric heating tube (14) is located in the movable hole. Cleaning annular knives (711) are respectively provided on both sides of the movable plate (73). The cleaning annular knives (711) are arranged on the periphery of the electric heating tube (14) to perform a sliding cleaning operation on the electric heating tube (14).

2. A topcon battery sintering device according to claim 1, characterized in that: The slag cleaning structure also includes a slag discharge pipe (74) and an air inlet cylinder (71). The movable plate (73) is provided with two mounting holes, and the two mounting holes are respectively located on both sides of the movable hole. The slag discharge pipe (74) and the air inlet cylinder (71) are respectively installed in the two mounting holes; a connecting plate (715) and a protective cover (79) are connected between the slag discharge pipe (74) and the air inlet cylinder (71), and the protective cover (79) is provided with an aperture for the electric heating pipe (14) to pass through; a driving bevel gear (78) is rotatably installed inside the slag discharge pipe (74), a partition plate (717) is fixed at an equal angle on the circumferential surface of the driving bevel gear (78), and a rotating bevel gear (717) is fixed on one end of the driving bevel gear (78). 6); a slag inlet (714) is provided on the circumferential surface of the slag discharge pipe (74); a blast port (716) is provided on the circumferential wall of the air inlet cylinder (71); the blast port (716) and the slag inlet (714) are arranged along the same straight line; the slag inlet (714) and the blast port (716) are both located above the connecting plate (715); the movable plate (73) is fixed to the bottom side of the furnace cover (9); a turning motor (718) is installed on the top side of the furnace cover (9); a transmission shaft (710) is installed on the output shaft of the turning motor (718), and a drive shaft (77) is installed at the bottom end of the drive shaft (710); the drive shaft (77) is vertically meshed with the rotating bevel gear (76).

3. A topcon battery sintering device according to claim 1, characterized in that: The air intake structure includes an induced draft fan (11), which is installed on a side wall of the sintering furnace body (2) and is connected to the chamber of the sintering furnace body (2). The induced draft fan (11) is connected to an air intake main pipe (8), and the air intake main pipe (8) is connected to a second branch air pipe (72). An air intake hole (75) is opened at one end of the air intake cylinder (71), and the other end of the second branch air pipe (72) is connected to the air intake hole (75) of the air intake cylinder (71).

4. A topcon battery sintering device according to claim 3, characterized in that: Both ends of the slag discharge pipe (74) are synchronously provided with slag cleaning holes, one of which is connected to the middle of the second diversion air pipe (72) through a diversion pipe, and a sliding buckle (712) is installed on the bottom side of the connecting plate (715), and a collection box (713) is slidably assembled in the sliding buckle (712), wherein the sliding buckle (712) and the collection box (713) are synchronously provided with guide holes, and when the sliding buckle (712) and the collection box (713) are combined, the two guide holes are aligned, and the guide hole on the sliding buckle (712) is connected to the other slag cleaning hole on the slag discharge pipe (74) through a guide pipe.

5. A topcon battery sintering device according to claim 4, characterized in that: A screw hole is provided on the movable plate (73), a reciprocating motor (20) is installed on one side outer wall of the sintering furnace body (2), a reciprocating screw rod (21) is assembled on the output shaft of the reciprocating motor (20), and the reciprocating screw rod (21) rotates through the screw hole in the movable plate (73).

6. A topcon battery sintering device according to claim 5, characterized in that: An L-shaped matching isolation plate (19) is fixed to the bottom side of the connecting plate (715), and a movable detection probe (18) is installed on the bottom side of the matching isolation plate (19). A temperature control calibration structure (12) is installed on one side of the sintering furnace body (2), and the temperature control calibration structure (12) includes an isolation frame (127). A movable hole is opened on the side wall of the sintering furnace body (2), and the chamber of the isolation frame (127) is aligned with the movable hole. The isolation frame (127) is fixed to the inner side of the sintering furnace body (2), and a calibration detection head (122) is installed on the top hole wall of the movable hole of the sintering furnace body (2). An L-shaped opening is opened on the isolation frame (127), and the opening on the isolation frame (127) is arranged corresponding to the matching isolation plate (19).

7. A topcon battery sintering device according to claim 6, characterized in that: A sliding block (123) is slidably provided in the movable hole, and an extrusion plate (126) and a slide rod (125) are fixed to one end of the sliding block (123), respectively. A socket is provided on the bottom side wall of the isolation frame (127), and the slide rod (125) is arranged through the socket. A limiting cap is provided at the end of the slide rod (125), and a spring (124) is fixed between the limiting cap and the outer side wall of the isolation frame (127). The extrusion plate (126) is located in the L-shaped opening. A calibration detection head (122) is fixed to the other end of the sliding block (123), and the calibration detection head (122) is used for blocking the movable hole.

8. A topcon battery sintering device according to claim 7, characterized in that: A control box (6) is installed on the outside of the sintering furnace body (2). The control box (6) is used to control the start and stop of the conveying motor (10), the induced draft fan (11), the reciprocating motor (20), and the flip motor (718), and can synchronously control the synchronous operation of multiple reciprocating motors (20) and multiple flip motors (718). The control box (6) is used to receive temperature detection data from the active detection probe (18) and the calibration detection head (122).

9. A topcon battery sintering device according to claim 7, characterized in that: The conveying frame (1) has rotating roller shafts (3) at both ends, and conveying rollers (5) are installed on the outside of the roller shafts (3). The outsides of the two conveying rollers (5) are matched with wire meshes (4). A conveying motor (10) is installed on the outside of one end of the conveying frame (1), and the output shaft of the conveying motor (10) is connected to one of the roller shafts (3) through a coupling. The conveying motor (10) is used to drive one of the roller shafts (3).

10. A method for using a topcon battery sintering device, characterized in that: The following steps are involved: S1: Check the appearance and connection of the device: S2: Turn on the main power of the equipment; S3: Cell sintering The topcon battery cells to be sintered are placed on a wire mesh (4) at one end of a conveying frame (1). Driven by a conveying motor (10), the wire mesh (4) drives the battery cells to move into the sintering furnace body (2). After the battery cells enter the sintering furnace body (2), the electric heating tube (14) starts heating. The movable plate (73) slides along the electric heating tube (14) driven by the reciprocating motor (20), and the cleaning annular knife (711) slides to clean the outer periphery of the electric heating tube (14); The cleaned dust falls into the space formed by the air inlet (75) and the protective cover (79); the induced draft fan (11) is started to transport the excess hot air in the sintering furnace body (2) to the second branch air pipe (72) through the air inlet main pipe (8), and then enter the air inlet cylinder (71); the hot air is ejected from the blast port (716), bringing the dust gas into the slag discharge pipe (74), and the dust is discharged through the rotation of the partition plate (717) and the blowing effect of the gas and introduced into the collection box (713). The gas is filtered by the collection box (713) and then flows back. At the same time, the electric heating tube (14) reheats the gas to improve the gas flow and heat diffusion effect in the furnace; S4: Temperature Monitoring and Calibration S5: Follow-up work Clean the collection box (713), pull out the collection box (713), and clean the dust and impurities.

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