An online heating device for battery cell production

Abstract

The utility model belongs to the technical field of battery cell production, and specifically is an online heating device for battery cell production, comprising a sintering furnace shell, wherein a conveying structure is arranged in the sintering furnace shell; a temperature regulating structure is arranged on the side of the sintering furnace shell; in order to ensure that silicon slices are heated evenly during sintering, the power of electric heating tubes is adjusted; secondly, in order to better ensure the heating effect of the silicon slices, the spacing between the electric heating tubes and the silicon slices is adjusted; in order to adjust the spacing between the electric heating tubes and the silicon slices, a two-way motor is operated to drive a lead screw to rotate, so that movable blocks on both sides can slide; under the push and cooperation of a first connecting rod and a second connecting rod, an upper sliding plate can move upward or downward, and a lower sliding plate can move downward or upward, so that the spacing between the electric heating tubes and the silicon slices is expanded or reduced, and the heating spacing of the silicon slices is adjusted, so that the sintering effect of the silicon slices can be better ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery sheet production, in particular to an online heating device for battery sheet production. Background Art

[0002] The cell is the core component of the solar panel, and its main function is to convert light energy into electrical energy.

[0003] In the production process of solar cells, the rapid heating and sintering process requires online heating. The purpose of this step is to make the metal electrode material and the silicon wafer surface reach a suitable temperature, undergo a solid-phase or liquid-phase reaction, and form a good ohmic contact. The temperature of rapid heating and sintering is generally controlled between 800°C and 1000°C, and the time is usually between a few seconds and tens of seconds. The specific temperature and time will be optimized according to different electrode materials and battery structures to achieve the best sintering effect.

[0004] When sintering battery cells, the heating equipment in the sintering furnace is generally fixedly installed in the sintering furnace. During sintering, in order to improve the sintering temperature, only the sintering power can be adjusted, and the adjustment range is limited, which affects the sintering effect. Therefore, in view of the above problem, an online heating device for battery cell production is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, in order to improve the sintering temperature, only the sintering power can be adjusted, the adjustment range is limited, and the sintering effect is affected. The utility model proposes an online heating device for battery cell production. By adjusting the power of the electric heating tube, coordinating the adjustment of the distance between the electric heating tube and the silicon wafer, and adjusting the heated distance of the silicon wafer, the sintering effect of the silicon wafer can be better guaranteed.

[0006] The utility model solves the technical problem by adopting a technical solution of an online heating device for producing battery cells, comprising a sintering furnace shell, a protective plate is arranged at the bottom of the sintering furnace shell, and the side edges of the protective plate are respectively fixed on the bottom inner wall of the sintering furnace shell.

[0007] A temperature regulating structure is arranged on the side of the sintering furnace shell.

[0008] The temperature regulating structure comprises two upper sliding plates and two lower sliding plates, a first electric heating tube is installed between the two upper sliding plates, and a second electric heating tube is synchronously installed between the two lower sliding plates.

[0009] The guide plate is arranged on the inner wall of the sintering furnace shell in the vertical direction. The upper sliding plate and the lower sliding plate are provided with notches on the opposite sides of the inner wall of the sintering furnace shell. The side edges of the guide plate are clamped in the notches.

[0010] A bidirectional motor is installed on one inner wall of the sintering furnace shell, and a fixing plate is fixed on the inner wall of the sintering furnace shell. Screws are installed at two output ends of the bidirectional motor, and the ends of the screws are rotatably installed on the fixing plate.

[0011] A second connecting rod, a screw hole is opened in the second connecting rod, the screw rod rotates and passes through the screw hole of the second connecting rod, connecting seats are installed on the upper and lower sides of the second connecting rod, and fixed seats are installed on the bottom side of the upper sliding plate and the top side of the lower sliding plate. The two ends of the first connecting rod are respectively installed between the connecting seat and the fixed seat through a pin shaft, and the two ends of the second connecting rod are respectively installed between the connecting seat and the fixed seat through a pin shaft.

[0012] The temperature adjustment structure also includes a guide rail, which is fixed on the inner wall of the other side of the sintering furnace shell. The guide rail is arranged parallel to the screw rod. The other two second connecting rods are arranged at a position close to the inner wall of the other side of the sintering furnace shell. The other two second connecting rods are provided with sliding grooves, and the other two second connecting rods are slidably arranged on the guide rail.

[0013] A conveying structure is arranged in the shell of the sintering furnace, and the conveying structure includes a conveying frame. Two groups of conveying frames are respectively arranged on both sides of the two ports of the shell of the sintering furnace. Transmission rollers are installed in the conveying frame through roller shafts. Two transmission belts are arranged on the transmission sleeves of the two transmission rollers. A wire mesh is connected between the two transmission belts. A driving motor is installed on the outer side of the conveying frame. The output shaft of the driving motor is connected to one end of the roller shaft of the driving roller, which can cooperate to realize the sintering loading of silicon wafers and convey and unload them after sintering.

[0014] Two support frames are installed in the middle of the inner wall of the sintering furnace shell, and thermocouples are installed on the two support frames respectively. The thermocouples are located on the upper and lower sides of the upper wire mesh respectively. The electric heating tube between the two upper sliding plates is arranged above the upper wire mesh, and the electric heating tube between the two lower sliding plates is arranged below the upper wire mesh, which can realize the detection of the upper and lower layer temperatures of the silicon wafer sintering.

[0015] A controller is installed on the outer wall of the sintering furnace shell. The controller is used to receive the temperature signal of the thermocouple, and the controller is used to control the power of the electric heating tube and the operating movement of the bidirectional motor. By receiving the monitored temperature signal, the controller can automatically adjust the power of the electric heating tube and the distance between the electric heating tube and the silicon wafer.

[0016] The utility model is beneficial in that:

[0017] In order to ensure that the silicon wafer is heated evenly during sintering, the power of the electric heating tube is adjusted. Secondly, in order to better ensure the heating effect of the silicon wafer, the distance between the electric heating tube and the silicon wafer is adjusted. In order to adjust the distance between the electric heating tube and the silicon wafer, a bidirectional motor is used to drive the lead screw to rotate so that the movable blocks on both sides can slide. Under the push and cooperation of the first connecting rod and the second connecting rod, the upper sliding plate can move upward or downward, and the lower sliding plate can move downward or upward, thereby expanding or reducing the distance between the electric heating tube and the silicon wafer, adjusting the heating distance of the silicon wafer, and better ensuring the sintering effect of the silicon wafer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure.

[0020] Figure 2 This is a schematic diagram showing the three-dimensional structure of the sintering furnace shell after cutting.

[0021] Figure 3 for Figure 2 Top view of the structure.

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA.

[0023] Figure 5 It is a schematic diagram of the overall half-section structure.

[0024] Figure 6 Schematic diagram of the spacing adjustment structure.

[0025] In the figure: 1. conveying frame, 2. driving motor, 3. sintering furnace shell, 4. protective plate, 5. guide plate, 6. electric heating tube, 7. upper sliding plate, 8. transmission belt, 9. wire mesh, 10. transmission roller, 11. controller, 12. guide rail, 13. support frame, 14. thermocouple, 15. lower sliding plate, 16. bidirectional motor, 17. first connecting rod, 18. fixed plate, 19. screw rod, 20. movable block, 21. second connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-6As shown, an online heating device for battery cell production includes a sintering furnace shell 3, a protective plate 4 is arranged at the bottom of the sintering furnace shell 3, and the side edges of the protective plate 4 are respectively fixed on the bottom inner wall of the sintering furnace shell 3.

[0028] A temperature regulating structure is provided on the side of the sintering furnace shell 3 .

[0029] The temperature adjustment structure includes two upper sliding plates 7 and two lower sliding plates 15 . A first electric heating tube 61 is installed between the two upper sliding plates 7 , and a second electric heating tube 62 is synchronously installed between the two lower sliding plates 15 .

[0030] The guide plate 5 is arranged on the inner wall of the sintering furnace shell 3 along the vertical direction. The upper sliding plate 7 and the lower sliding plate 15 are provided with notches on the opposite sides of the inner wall of the sintering furnace shell 3, and the side edges of the guide plate 5 are clamped in the notches.

[0031] A bidirectional motor 16 is installed on one inner wall of the sintering furnace shell 3 , and a fixing plate 18 is fixed on the inner wall of the sintering furnace shell 3 . Screws 19 are installed at two output ends of the bidirectional motor 16 , and the ends of the screws 19 are rotatably mounted on the fixing plate 18 .

[0032] A second connecting rod 21 is provided with a screw hole, and the screw rod 19 rotates and passes through the screw hole of the second connecting rod 21. Connecting seats are installed on the upper and lower sides of the second connecting rod 21, and fixed seats are installed on the bottom side of the upper sliding plate 7 and the top side of the lower sliding plate 15. The two ends of the first connecting rod 17 are respectively installed between the connecting seat and the fixed seat through a pin shaft, and the two ends of the second connecting rod 21 are respectively installed between the connecting seat and the fixed seat through a pin shaft.

[0033] The temperature regulating structure also includes a guide rail 12, which is fixed on the inner wall of the other side of the sintering furnace shell 3. The guide rail 12 is arranged in parallel with the screw 19. The other two second connecting rods 21 are arranged at a position close to the inner wall of the other side of the sintering furnace shell 3. The other two second connecting rods 21 are provided with slide grooves, and the other two second connecting rods 21 are slidably arranged on the guide rail 12. When sintering the battery cell, in order to ensure the sintering effect, it is necessary to ensure that the temperature of the silicon wafer is heated is stable. In order to ensure that the silicon wafer is heated evenly during sintering, the electric The power of the heat pipe 6. Secondly, in order to better ensure the heating effect of the silicon wafer, the distance between the electric heating pipe 6 and the silicon wafer can be adjusted. In order to adjust the distance between the electric heating pipe 6 and the silicon wafer, the bidirectional motor 16 is operated to drive the screw 19 to rotate, so that the movable blocks 20 on both sides can slide. When the movable blocks 20 on both sides slide outward at the same time, under the push and cooperation of the first connecting rod 17 and the second connecting rod 21, the upper sliding plate 7 can move upward and the lower sliding plate 15 can move downward, which can expand the distance between the electric heating pipe 6 and the silicon wafer.

[0034] When the two movable blocks 20 slide inward, with the cooperation of the first connecting rod 17 and the second connecting rod 21, the upper sliding plate 7 moves downward and the lower sliding plate 15 moves upward, which can reduce the distance between the electric heating tube 6 and the silicon wafer and better ensure the sintering effect of the silicon wafer.

[0035] A conveying structure is provided in the sintering furnace shell 3, and the conveying structure includes a conveying frame 1. Two groups of conveying frames 1 are respectively arranged on both sides of the two ports of the sintering furnace shell 3. A transmission roller 10 is installed in the conveying frame 1 through the roller shaft. Two transmission belts 8 are provided on the transmission sleeves of the two transmission rollers 10. A wire mesh 9 is connected between the two transmission belts 8. A driving motor 2 is installed on the outer side of the conveying frame 1. The output shaft of the driving motor 2 is connected to one end of the roller shaft of the driving roller 10. When sintering silicon wafers, the silicon wafers need to be transported to the sintering furnace shell 3. During transportation, the silicon wafers are placed on the wire mesh 9. The driving motor 2 works, and with the cooperation of the transmission roller 10, the transmission belt 8 is rotated, which drives the wire mesh 9 to rotate, so as to realize the loading and sintering of the silicon wafers. After sintering, the material is discharged.

[0036] Two support frames 13 are installed in the middle position of the inner wall of the sintering furnace shell 3, and thermocouples 14 are respectively installed on the two support frames 13, and the thermocouples 14 are respectively located on the upper and lower sides of the upper wire mesh 9. The electric heating tube 6 between the two upper sliding plates 7 is arranged above the upper wire mesh 9, and the electric heating tube 6 between the two lower sliding plates 15 is arranged below the upper wire mesh 9. A controller 11 is installed on the outer wall of the sintering furnace shell 3, and the controller 11 is used to receive the temperature signal of the thermocouple 14, and the controller 11 is used to control the power of the electric heating tube 6 and the operating movement of the bidirectional motor 16. At the same time, thermocouples are set to monitor the upper and lower temperatures of the silicon wafer. When there is a temperature difference between the monitored temperature and the temperature required for sintering, the sintering power of the electric heating tube 6 is adjusted through temperature information feedback, and the distance between the electric heating tube 6 and the silicon wafer can be adjusted at the same time to adjust the sintering temperature so as to achieve a better heating effect.

[0037] In the description of this specification, the basic principles, main features and advantages of the utility model are shown and described above. For those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model shall fall within the scope of the utility model claimed for protection.

Claims

1. An online heating device for battery cell production, characterized in that: include: A sintering furnace shell (3), wherein a protective plate (4) is provided at the bottom of the sintering furnace shell (3), and the side edges of the protective plate (4) are respectively fixed to the inner side walls of the bottom of the sintering furnace shell (3); A temperature regulating structure is provided on the side of the sintering furnace shell (3); The temperature regulating structure comprises two upper sliding plates (7) and two lower sliding plates (15), a first electric heating tube (61) is installed between the two upper sliding plates (7), and a second electric heating tube (62) is synchronously installed between the two lower sliding plates (15); A guide plate (5), the guide plate (5) being arranged on the inner wall of the sintering furnace shell (3) in a vertical direction, and notches are provided on the surfaces of the upper sliding plate (7) and the lower sliding plate (15) opposite to the inner wall of the sintering furnace shell (3), and the side edges of the guide plate (5) are clamped in the notches; A bidirectional motor (16) is mounted on an inner wall of one side of the sintering furnace shell (3), and a fixing plate (18) is fixed on the inner wall of the sintering furnace shell (3); screw rods (19) are mounted on two output ends of the bidirectional motor (16), and the ends of the screw rods (19) are rotatably mounted on the fixing plate (18); A second connecting rod (21), wherein a screw hole is provided in the second connecting rod (21), and the screw rod (19) is rotatably inserted through the screw hole of the second connecting rod (21), and connecting seats are installed on the upper and lower sides of the second connecting rod (21), and the bottom side of the upper sliding plate (7) and the top side of the lower sliding plate (15) are both installed with fixed seats, and the two ends of the first connecting rod (17) are respectively installed between the connecting seat and the fixed seat through a pin shaft, and the two ends of the second connecting rod (21) are respectively installed between the connecting seat and the fixed seat through a pin shaft.

2. The online heating device for battery cell production according to claim 1, characterized in that: The temperature regulating structure also includes a guide rail (12), the guide rail (12) being fixed to the inner wall of the other side of the sintering furnace shell (3), the guide rail (12) being arranged in parallel with the screw rod (19), the other two second connecting rods (21) being arranged at a position close to the inner wall of the other side of the sintering furnace shell (3), the other two second connecting rods (21) being provided with sliding grooves, and the other two second connecting rods (21) being slidably arranged on the guide rail (12).

3. The online heating device for battery cell production according to claim 2, characterized in that: A conveying structure is arranged in the sintering furnace shell (3), and the conveying structure comprises a conveying frame (1). Two sets of conveying frames (1) are arranged on both sides of two ports of the sintering furnace shell (3), respectively. A transmission roller (10) is installed in the conveying frame (1) through a roller shaft. Two transmission belts (8) are arranged on the transmission sleeves of the two transmission rollers (10), and a wire mesh (9) is connected between the two transmission belts (8).

4. The online heating device for battery cell production according to claim 3 is characterized in that: A drive motor (2) is installed on the outer side of the conveying frame (1), and an output shaft of the drive motor (2) is connected to one end of a roller shaft of a driving roller (10).

5. The online heating device for battery cell production according to claim 4, characterized in that: Two support frames (13) are installed at the middle position of the inner wall of the sintering furnace shell (3), and thermocouples (14) are respectively installed on the two support frames (13). The thermocouples (14) are respectively located on the upper and lower sides of the upper wire mesh (9). The electric heating tube (6) between the two upper sliding plates (7) is arranged above the upper wire mesh (9), and the electric heating tube (6) between the two lower sliding plates (15) is arranged below the upper wire mesh (9).

6. The online heating device for battery cell production according to claim 5, characterized in that: A controller (11) is installed on the outer wall of the sintering furnace shell (3), and the controller (11) is used to receive the temperature signal of the thermocouple (14). The controller (11) is also used to control the power of the electric heating tube (6) and the operating movement of the bidirectional motor (16).

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