Conveying device and tandem connection equipment

Abstract

The utility model relates to a conveying device and tandem connection equipment. The conveying device comprises a rack, a conveying belt, a bottom plate and a magnetic attraction assembly. The bottom plate is installed on the rack and located below the conveying face of the conveying belt, and the conveying face of the conveying belt is supported by the bottom plate. The conveying belt is arranged on the rack in a sleeving mode and conveys battery strings to be connected in series, the battery strings to be connected in series comprise welding strips and battery pieces which are stacked, and the welding strips are pressed and attached to the battery pieces through the pressing tool; the conveying belt is also used for conveying the battery strings to be connected in series to a series connection station; the magnetic attraction assembly is detachably installed on the bottom plate, and the magnetic attraction assembly attracts the pressing tool so that the pressing tool can be positioned on the conveying belt supported by the bottom plate. According to the conveying device, the magnets of different sizes and the installation base are assembled into the magnetic attraction assemblies of different magnetic attraction forces, the magnetic attraction assemblies are detachably installed on the bottom plate, when different pressing tools are attracted, only the magnetic attraction assemblies of different magnetic attraction forces need to be replaced, the whole bottom plate does not need to be replaced, the production cost is reduced, and the compatibility of the conveying device is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production equipment, and more specifically to a conveying device and a serial connection device. Background Art

[0002] When producing battery strings on a stringing machine, the cells, welding ribbons, and ribbon pressing fixtures are laid out and stacked on a conveyor. The conveyor consists of a welding base plate and a conveyor belt. The welding base plate is installed below the conveyor belt to support it, while the conveyor belt is used to carry and transport the cells, welding ribbons, and ribbon pressing fixtures. The ribbon pressing fixtures are used to press the ribbons onto the cells.

[0003] To ensure stable conveying of the ribbon clamping tool during conveyor belt operation, slots are typically cut in the welding base plate beneath the conveyor belt along the conveying direction. Magnets are installed in these slots, with the slots matching the magnets' size to secure them. During conveying, the magnets attract the ribbon clamping tool on the conveyor belt, positioning the ribbon on the cell. However, different sizes of magnets may be required to attract different ribbon clamping tools. Therefore, replacing magnets of different sizes requires replacing the welding base plate with slots of different sizes, which is costly. Utility Model Content

[0004] This application addresses the problem that existing conveying devices require replacement of different welding base plates for different welding ribbon pressing tooling, resulting in high replacement costs. It provides a conveying device and serial connection equipment that can be compatible with different welding ribbon pressing tooling at low cost.

[0005] In a first aspect, the present application provides a conveying device, comprising a frame, a conveyor belt, a bottom plate, and a magnetic attraction assembly; wherein:

[0006] The bottom plate is mounted on the frame and is located below the conveying surface of the conveyor belt, and the bottom plate is configured to support the conveying surface of the conveyor belt;

[0007] The conveyor belt is mounted on the frame and is configured to convey the battery strings to be connected in series. The battery strings to be connected in series include stacked welding ribbons and battery cells. The welding ribbons are pressed against the battery cells by a pressing tool. The conveyor belt is also configured to transport the battery strings to be connected in series to the connection station.

[0008] The magnetic attraction assembly is detachably mounted on the base plate, and the magnetic attraction assembly is configured to attract the pressing tooling to position the pressing tooling on the conveyor belt supported by the base plate;

[0009] The magnetic attraction assembly includes a mounting base, a magnet and a fixing piece. The magnet is installed in an opening on the upper surface of the mounting base, and the fixing piece is installed on the mounting base to press the magnet to position it on the mounting base.

[0010] By assembling magnets of different sizes and mounting bases into magnetic assemblies with different magnetic attraction forces, and detachably mounting the magnetic assemblies on the base plate, when adsorbing different pressing tooling, it is only necessary to replace the magnetic assemblies with different magnetic attraction forces without replacing the entire base plate, thereby reducing production costs and improving the compatibility of the conveying device.

[0011] Optionally, the fixing member is a cover plate, which is detachably mounted on the mounting seat to press the magnet tightly onto the mounting seat; or, the fixing member is a tape, which is bonded to the mounting seat to press the magnet tightly onto the mounting seat.

[0012] The fixing parts can be flexibly selected according to the actual situation on site. When the fixing parts are covered, the magnets can be reliably pressed; when the fixing parts are tapes, it is easy to disassemble and install, and the cost is low.

[0013] Optionally, a mounting slot is provided on the bottom plate, and the magnetic component is installed in the mounting slot;

[0014] Alternatively, a step is provided on the side of the bottom plate, and the magnetic component is installed on the step.

[0015] When the magnetic assembly is installed in the center of the base plate, it can be installed through the mounting slots; when the magnetic assembly is installed on the side of the base plate, it can be installed using the steps. By choosing the most convenient installation method for the magnetic assembly according to the different installation locations, production efficiency can be improved and costs can be reduced.

[0016] Optionally, after the magnetic assembly is installed in the mounting groove or on the step, the top surface of the fixing part is flush with the top surface of the base plate; or, after the magnetic assembly is installed in the mounting groove or on the step, the top surface of the fixing part is higher or lower than the top surface of the base plate, and the height difference between the top surface of the fixing part and the top surface of the base plate is less than or equal to 0.2 mm.

[0017] The positional relationship between the top surface of the fixing and the top surface of the base plate can be selected based on the actual required pressing force of the press pin. Configuring the top surface of the fixing and the top surface of the base plate to be flush can improve the flatness of the top surface of the base plate, will not hinder the operation of the conveyor belt, and requires a medium pressing force of the press pin. Configuring the top surface of the fixing to be higher than the top surface of the base plate requires a lower pressing force of the press pin. Configuring the top surface of the fixing to be lower than the top surface of the base plate requires a higher pressing force of the press pin. Controlling the height difference between the top surface of the fixing and the top surface of the base plate to be less than or equal to 0.2mm ensures that the press pin can effectively press the welding strip.

[0018] Optionally, the pressing tool includes a frame and a group of pressing pins arranged in an array on the frame; the pressing pin group is configured to press the welding ribbon onto the battery cell; the magnetic suction component is arranged on both sides of the bottom plate along the conveying direction of the conveyor belt, and is used to adsorb the two ends of the frame of the pressing tool.

[0019] The magnetic component can position the clamping tooling by adsorbing the two ends of the frame of the clamping tooling. At this time, the magnetic components are arranged on both sides of the base plate, corresponding to the positions of the two ends of the frame, to prevent the clamping tooling from deviating during transportation.

[0020] Optionally, the pressing tool includes a frame and a group of pressing pins arranged in an array on the frame; the pressing pin group is configured to press the solder ribbon onto the battery cell; the magnetic suction component is arranged in the middle of the base plate for adsorbing the pressing pin group of the pressing tool.

[0021] The magnetic component can position the pressing tooling by adsorbing the pressing pin group of the pressing tooling. At this time, the magnetic component is arranged in the middle of the base plate, corresponding to the position of the pressing pin group, which can ensure that the pressing pin can stably press the welding ribbon.

[0022] Optionally, a magnetic attraction component is arranged at least in the middle of the bottom plate at the serial connection station; or, a magnetic attraction component is arranged at least in the middle of the bottom plate at the serial connection station and in the middle of the bottom plate at the input end of the conveyor belt.

[0023] A magnetic suction component is set in the middle of the bottom plate of the serial connection station. The magnetic suction component is used to absorb the pressure pin group of the pressing tool to position the pressing tool, which can ensure that the pressure pin can effectively press the solder ribbon during the serial connection process and ensure the serial connection quality; a magnetic suction component is set in the middle of the bottom plate at the input end of the conveyor belt. The magnetic suction component is used to absorb the pressure pin group of the pressing tool to position the pressing tool, which can ensure that the pressure pin can effectively press the solder ribbon when the battery cell and the solder ribbon are stacked, and ensure the stacking quality of the battery cell and the solder ribbon.

[0024] Optionally, a magnetic suction component installed in the middle of the base plate is used to adsorb at least a row of pressure pins at the front end and a row of pressure pins at the rear end of the pressing tooling; wherein, the front end of the pressing tooling is the front end along the conveying direction of the conveyor belt, and the rear end of the pressing tooling is the rear end along the conveying direction of the conveyor belt.

[0025] By using the magnetic suction component in the middle of the bottom plate to absorb at least the first and last row of pressure pins of the pressing tooling, it can at least ensure that the welding ribbon is reliably pressed by the pressing tooling to the first and last ends of the battery cell. This can not only ensure the connection quality between the welding ribbon and the first and last ends of the battery cell, making the connection reliable, but also reduce the number of magnetic suction components configured and reduce equipment costs.

[0026] Optionally, adsorption holes are provided on the top surface of the bottom plate, and the adsorption holes are connected to the negative pressure source; and through holes that can be connected to the adsorption holes are provided on the conveyor belt.

[0027] The adsorption holes on the bottom plate connected to the negative pressure source adsorb the battery cells and welding ribbons conveyed on the conveyor belt through the through holes on the conveyor belt, thereby realizing the positioning of the battery cells and welding ribbons on the conveyor belt.

[0028] Optionally, an adhesive sticker covering the top surface of the bottom plate and the top surface of the magnetic component is installed on the bottom plate, and an avoidance groove corresponding to the adsorption hole is opened on the adhesive sticker.

[0029] Covering the upper surface of the bottom plate with adhesive tape can prevent the bottom plate from being worn; by providing an avoidance groove on the adhesive tape, it can prevent the adhesive tape from clogging the adsorption holes and affecting the adsorption effect.

[0030] In a second aspect, the present application provides a stringing device, comprising a cell loading device, a solder ribbon loading device, a tooling handling device, a stringing device, and any conveying device as described in the first aspect; wherein:

[0031] The battery cell loading device is configured to transport the battery cells to the conveying device;

[0032] The solder ribbon feeding device is configured to transport the solder ribbon to the conveying device or the battery cells carried by the conveying device, so that the solder ribbon and the battery cells are stacked to form a battery string to be connected in series;

[0033] The tool handling device is configured to carry the pressing tool to the battery cell carried by the conveying device and press the welding ribbon onto the battery cell;

[0034] The conveying device is configured to convey the battery strings to be connected in series and the pressing tool to the stringing station below the stringing device;

[0035] The string connection device is configured to string the welding ribbons and the battery cells together to form a battery string at the string connection station.

[0036] By configuring a conveying device including a detachable magnetic attraction component on the serial connection device, and the magnetic attraction components with different magnetic attraction forces are assembled by magnets of different sizes and mounting bases, when the serial connection device requires different clamping tooling to press the welding strip, it is only necessary to replace the magnetic attraction components with different magnetic attraction forces without replacing the entire base plate of the conveying device, which not only reduces the production cost of the serial connection device, but also improves the compatibility of the serial connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic plan view of an optional embodiment of the serial connection device in the present application;

[0038] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of an optional embodiment of the conveying device in the serial connection device shown;

[0039] Figure 3 for Figure 2 A schematic diagram of a three-dimensional structure of an optional embodiment of the bottom plate;

[0040] Figure 4 for Figure 3 A top view of

[0041] Figure 5 for Figure 4 AA section view in;

[0042] Figure 6 for Figure 2 A schematic three-dimensional structural diagram of another optional embodiment of the bottom plate;

[0043] Figure 7 for Figure 6 A top view of

[0044] Figure 8 for Figure 7 BB cross-sectional view in;

[0045] Figure 9 for Figure 1 A front view of an optional embodiment of a pressing tool in the serial connection device shown;

[0046] Figure 10 for Figure 9 A top view of

[0047] Figure 11 for Figure 9 CC section view in.

[0048] Figures 1 to 11 Including:

[0049] Serial device 1;

[0050] Conveying device 10, frame 11, conveyor belt 12, through hole 121, bottom plate 13, mounting groove 131, step 132, adsorption hole 133, support column 134, magnetic attraction assembly 14, mounting base 141, magnet 142, fixing member 143, adhesive 15, avoidance groove 151, driving mechanism 16;

[0051] Pressing fixture 20, frame 21, pressing pin group 22, a row of pressing pins at the head end 23, a row of pressing pins at the tail end 24, and a welding ribbon extension direction 25;

[0052] Cell loading device 30, solder ribbon loading device 40, tool handling device 50, stringing device 60, cell conveying device 70, tool conveying device 80, tool unloading device 90;

[0053] Solar cell 101, solder ribbon 102, and serial connection station 103. 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] like Figure 1As shown, the present application provides a stringing device 1 for stringing cells 101 into a cell string via a solder ribbon 102. The device mainly comprises a cell loading device 30, a solder ribbon loading device 40, a tooling handling device 50, a stringing device 60 and a conveying device 10.

[0056] Wherein: the battery cell loading device 30 is configured to transport the battery cell 101 to the conveying device 10;

[0057] The solder ribbon loading device 40 is configured to transport the solder ribbon 102 onto the conveyor device 10 or onto the battery cell 101 carried by the conveyor device 10, so that the solder ribbon 102 and the battery cell 101 are stacked to form a battery string to be connected in series;

[0058] The tool handling device 50 is configured to carry the pressing tool 20 to the battery cell 101 carried by the conveying device 10 and press the welding ribbon 102 onto the battery cell 101;

[0059] The conveying device 10 is configured to convey the battery strings to be connected in series and the pressing tool 20 to the stringing station 103 below the stringing device 60;

[0060] The stringing device 60 is configured to string the solder ribbons 102 and the battery cells 101 together to form a battery string at the stringing station 103 .

[0061] Optionally, the stringing device 1 may further include a cell conveying device 70, a tool conveying device 80, and a tool unloading device 90. The cell conveying device 70 is used to convey the cell 101, the tool conveying device 80 is used to convey the pressing tool 20, and the tool unloading device 90 is used to transfer the pressing tool 20 from the conveying device 10 to the tool conveying device 80, so that the pressing tool 20 can be recycled.

[0062] The term "connection" in this application includes welding or gluing. Welding refers to soldering the soldering ribbon 102 to the cell 101; gluing refers to applying glue or printing glue on the cell 101, which is then cured in the connection station 103 to adhere the soldering ribbon 102 to the cell 101.

[0063] In the embodiment of the stringing device 1 described above, the cell loading device 30, the ribbon loading device 40, the tool handling device 50, the stringing device 60, the cell conveying device 70, the tool conveying device 80, and the tool unloading device 90 can all employ any available structure in the prior art and are not described in detail here. Optionally, the cell loading device 30 and the tool handling device 50 can share a common drive system.

[0064] The present application mainly improves the conveying device 10 in the serial connection device 1 , and the conveying device 10 is described in detail below.

[0065] like Figure 2As shown, an optional embodiment of the conveying device 10 includes a frame 11, a conveyor belt 12, a bottom plate 13 and a magnetic attraction component 14 (see Figure 3 and Figure 6 ).

[0066] Wherein: the bottom plate 13 is installed on the frame 11 and is located below the conveying surface of the conveyor belt 12. The bottom plate 13 is configured to support the conveying surface of the conveyor belt 12;

[0067] The conveyor belt 12 is mounted on the frame 11 and is configured to convey the battery strings to be connected in series. The battery strings to be connected in series include stacked solder ribbons 102 and battery cells 101. The solder ribbons 102 are pressed against the battery cells 101 by the pressing tool 20. The conveyor belt 12 is also configured to transport the battery strings to be connected in series to the connecting station 103.

[0068] The magnetic attraction assembly 14 is detachably mounted on the base plate 13 , and the magnetic attraction assembly 14 is configured to attract the pressing tool 20 to position the pressing tool 20 on the conveyor belt 12 supported by the base plate 13 ;

[0069] See also Figure 5 and Figure 8 The magnetic assembly 14 includes a mounting base 141, a magnet 142, and a fixing member 143. The magnet 142 is installed in an opening on the upper surface of the mounting base 141. The fixing member 143 is installed on the mounting base 141 to press the magnet 142 tightly and position it on the mounting base 141. As needed, the magnet 142 can have various sizes, correspondingly forming magnetic assemblies 14 with various magnetic attraction forces.

[0070] By assembling magnets 142 of different sizes with mounting bases 141 into magnetic assemblies 14 with different magnetic attraction forces, and detachably mounting the magnetic assemblies 14 on the base plate 13, when adsorbing different clamping tooling 20, only the magnetic assemblies 14 with different magnetic attraction forces need to be replaced without replacing the entire base plate 13, thereby reducing production costs and improving the compatibility of the conveying device 10.

[0071] In one embodiment, the conveyor belt 12 is driven by a drive mechanism 16. The drive mechanism 16 generally includes a motor, a driving roller, and a driven roller. The motor is connected to the driving roller, and the conveyor belt 12 is mounted on the driving roller and the driven roller. The motor drives the driving roller to rotate, thereby driving the conveyor belt 12.

[0072] In one embodiment, the base plate 13 is divided into a plurality of modules connected end to end along the conveying direction of the conveyor belt 12, and each module is fixed to the frame 11 by a plurality of support columns 134 (generally four). Of course, the base plate 13 can also be a single piece, and the entire base plate 13 is fixed to the frame 11 by a plurality of support columns 134.

[0073] The fixing member 143 of the magnetic assembly 14 can be flexibly selected according to the actual situation on site, for example, it can be a cover plate or tape.

[0074] When the fixing member 143 is a cover plate, the cover plate can be detachably mounted on the mounting seat 141 to press and position the magnet 142 on the mounting seat 141; or, when the fixing member 143 is a tape, the tape is adhered to the mounting seat 141 to press and position the magnet 142 on the mounting seat 141.

[0075] When the fixing member 143 is a cover plate, the magnet 142 can be reliably pressed; when the fixing member 143 is an adhesive tape, it is easy to assemble and disassemble and has low cost.

[0076] There are many installation positions of the magnetic assembly 14, such as being located on both sides of the base plate 13 or the base plate 13 module, or being located in the middle of the base plate 13 or the base plate 13 module.

[0077] like Figures 3 to 5 As shown, when the magnetic components 14 are located on both sides of the bottom plate 13 , steps 132 are provided on the side edges of the bottom plate 13 , and the magnetic components 14 are installed on the steps 132 .

[0078] Or, as Figures 6 to 8 As shown, when the magnetic assembly 14 is located in the middle of the bottom plate 13 , a mounting groove 131 is defined on the bottom plate 13 , and the magnetic assembly 14 is mounted in the mounting groove 131 .

[0079] Of course, magnetic components 14 can also be installed in the middle and both sides of the bottom plate 13 module. Figure 6 shown.

[0080] When the magnetic assembly 14 is installed in the center of the base plate 13, it can be installed through the installation slot 131. When the magnetic assembly 14 is installed on the side of the base plate 13, it can be installed through the step 132. By selecting the most convenient installation method for the magnetic assembly 14 according to different installation locations, production efficiency can be improved and costs can be reduced.

[0081] The positional relationship between the top surface of the fixing member 143 and the top surface of the bottom plate 13 can be selected according to the actual required pressing force of the indenter. The top surface of the fixing member 143 can be kept flush with the top surface of the bottom plate 13, or the top surface of the fixing member 143 can be higher or lower than the top surface of the bottom plate 13.

[0082] In one embodiment, optionally, after the magnetic assembly 14 is installed in the installation groove 131 or on the step 132 , the top surface of the fixing member 143 is flush with the top surface of the bottom plate 13 .

[0083] Configuring the top surface of the fixing member 143 to be flush with the top surface of the bottom plate 13 can improve the flatness of the top surface of the bottom plate 13, without hindering the operation of the conveyor belt 12, and the required pressing force of the pressing needle is medium.

[0084] In another embodiment, optionally, after the magnetic assembly 14 is installed in the mounting groove 131 or on the step 132, the top surface of the fixing member 143 is higher or lower than the top surface of the base plate 13, and the height difference between the top surface of the fixing member 143 and the top surface of the base plate 13 is less than or equal to 0.2 mm.

[0085] Configuring the top surface of the fixing member 143 higher than the top surface of the base plate 13 requires less pressing force from the press pins; configuring the top surface of the fixing member 143 lower than the top surface of the base plate 13 requires greater pressing force from the press pins. Keeping the height difference between the top surface of the fixing member 143 and the top surface of the base plate 13 to less than or equal to 0.2 mm ensures that the press pins can effectively press the solder ribbon.

[0086] like Figures 9 to 11 As shown, in one embodiment, optionally, the pressing tool 20 includes a frame 21 and a pressing needle group 22 arranged in an array on the frame 21; the pressing needle group 22 is configured to press the welding ribbon 102 onto the battery cell 101.

[0087] like Figures 3 to 5 As shown, when the magnetic components 14 are arranged on both sides of the bottom plate 13 along the conveying direction of the conveyor belt 12 , they are used to absorb and press the two ends of the frame 21 of the tooling 20 .

[0088] The magnetic component 14 can position the pressing tool 20 by adsorbing the two ends of the frame 21 of the pressing tool 20. At this time, the magnetic component 14 is arranged on both sides of the base plate 13, corresponding to the positions of the two ends of the frame 21, to prevent the pressing tool 20 from deviating during transportation.

[0089] like Figures 6 to 8 As shown, when the magnetic attraction component 14 is arranged in the middle of the bottom plate 13 , it is used to attract and press the pressing needle group 22 of the tooling 20 .

[0090] The magnetic component 14 can position the pressing tool 20 by adsorbing the pressure pin group 22 of the pressing tool 20. At this time, the magnetic component 14 is arranged in the middle of the base plate 13, corresponding to the position of the pressure pin group 22, to ensure that the pressure pin can stably press the welding strip 102.

[0091] like Figure 2 As shown, in one embodiment, optionally, a magnetic attraction component 14 is arranged at least in the middle of the bottom plate 13 at the serial connection station 103.

[0092] A magnetic component 14 is set in the middle of the bottom plate 13 of the serial connection station 103. The magnetic component 14 is used to absorb the pressing needle group 22 of the pressing tool 20 to position the pressing tool 20, which can ensure that the pressing needle can effectively press the welding strip 102 during the serial connection process to ensure the serial connection quality.

[0093] In another embodiment, optionally, a magnetic attraction component 14 is arranged at least in the middle of the bottom plate 13 at the serial connection station 103 and in the middle of the bottom plate 13 at the input end of the conveyor belt 12 .

[0094] A magnetic attraction component 14 is set in the middle of the bottom plate 13 at the input end of the conveyor belt 12. The magnetic attraction component 14 is used to absorb the pressing needle group 22 of the pressing tool 20 to position the pressing tool 20, thereby ensuring that the pressing needle can effectively press the solder ribbon 102 when the battery cell 101 and the solder ribbon 102 are stacked, thereby ensuring the stacking quality of the battery cell 101 and the solder ribbon 102.

[0095] In one embodiment, optionally, the magnetic attraction component 14 installed in the middle of the bottom plate 13 is used to at least attract and press the first row of pressure pins 23 and the tail row of pressure pins 24 of the tool 20 (such as Figure 10 wherein the head end of the compacting tool 20 is the front end along the conveying direction of the conveyor belt 12, and the tail end of the compacting tool 20 is the rear end along the conveying direction of the conveyor belt 12. Figure 10 The illustrated welding strip extension direction 25 coincides with the conveying direction of the conveyor belt 12 .

[0096] By using the magnetic attraction component 14 in the middle of the bottom plate 13 to absorb at least the row of pressure pins 23 at the front end and the row of pressure pins 24 at the rear end of the pressing tool 20, it can at least ensure that the welding ribbon 102 is reliably pressed by the pressing tool 20 on the front and rear ends of the battery cell 101, which can not only ensure the connection quality between the welding ribbon 102 and the front and rear ends of the battery cell 101, making the connection reliable, but also reduce the number of configurations of the magnetic attraction component 14 and reduce equipment costs.

[0097] In another embodiment, optionally, the magnetic attraction component 14 installed in the middle of the bottom plate 13 is used to attract and press all the pressing pins on the tooling 20 to further improve the quality of the serial connection between the solder ribbon and the battery cell.

[0098] like Figures 3 to 8 As shown, optionally, the top surface of the bottom plate 13 is provided with adsorption holes 133, which are connected to a negative pressure source; and the conveyor belt 12 is provided with through holes 121 that can be connected to the adsorption holes 133. The number and shape of the adsorption holes 133 and through holes 121 are determined as needed, and are typically arranged in a matrix.

[0099] The adsorption holes 133 on the bottom plate 13 connected to the negative pressure source adsorb the battery cells 101 and welding ribbons 102 conveyed on the conveyor belt 12 through the through holes 121 on the conveyor belt 12, thereby achieving the positioning of the battery cells 101 and welding ribbons 102 on the conveyor belt 12.

[0100] like Figure 2 As shown, optionally, a sticker 15 covering the top surface of the bottom plate 13 and the top surface of the magnetic assembly 14 is installed on the bottom plate 13 , and an avoidance groove 151 corresponding to the adsorption hole 133 is opened on the sticker 15 .

[0101] The upper surface of the bottom plate 13 is covered with the adhesive tape 15 to prevent the bottom plate 13 from being worn. By providing the avoidance groove 151 on the adhesive tape 15 , the adhesive tape 15 is prevented from blocking the adsorption holes 133 and affecting the adsorption effect.

[0102] The present application configures a conveying device 10 including a detachable magnetic attraction component 14 on the serial connection device 1, and the magnetic attraction components 14 with different magnetic attraction forces are assembled from magnets 142 of different sizes and mounting bases 141. When the serial connection device 1 requires different pressing tooling 20 to press the welding strip 102, it is only necessary to replace the magnetic attraction components 14 with different magnetic attraction forces without replacing the entire base plate 13 of the conveying device 10, which not only reduces the production cost of the serial connection device 1, but also improves the compatibility of the serial connection device 1.

[0103] 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 conveying device, characterized in that: The conveying device includes a frame, a conveyor belt, a bottom plate and a magnetic attraction component; wherein: The bottom plate is mounted on the frame and is located below the conveying surface of the conveyor belt, and the bottom plate is configured to support the conveying surface of the conveyor belt; The conveyor belt is mounted on the frame and is configured to convey a battery string to be connected in series. The battery string to be connected in series includes stacked welding ribbons and battery cells, and the welding ribbons are pressed against the battery cells by a pressing tool. The conveyor belt is also configured to transport the battery string to be connected in series to a connection station. The magnetic attraction component is detachably mounted on the bottom plate, and the magnetic attraction component is configured to attract the pressing tool to position the pressing tool on the conveyor belt supported by the bottom plate; The magnetic attraction assembly includes a mounting seat, a magnet and a fixing piece. The magnet is installed in an opening on the upper surface of the mounting seat. The fixing piece is installed on the mounting seat to press the magnet to position it on the mounting seat.

2. The conveying device according to claim 1, characterized in that The fixing member is a cover plate, which is detachably mounted on the mounting seat to press the magnet tightly and position it on the mounting seat; or the fixing member is a tape, which is adhered to the mounting seat to press the magnet tightly and position it on the mounting seat.

3. The conveying device according to claim 1, characterized in that The bottom plate is provided with a mounting groove, and the magnetic attraction component is installed in the mounting groove; Alternatively, a step is provided on the side of the bottom plate, and the magnetic attraction component is installed on the step.

4. The conveying device according to claim 3, characterized in that After the magnetic assembly is installed in the mounting groove or on the step, the top surface of the fixing part is flush with the top surface of the base plate; or, after the magnetic assembly is installed in the mounting groove or on the step, the top surface of the fixing part is higher or lower than the top surface of the base plate, and the height difference between the top surface of the fixing part and the top surface of the base plate is less than or equal to 0.2 mm.

5. The conveying device according to claim 1, characterized in that The pressing tool includes a frame and a group of pressing needles arranged in an array on the frame; the pressing needle group is configured to press the welding ribbon onto the battery cell; the magnetic suction component is arranged on both sides of the bottom plate along the conveying direction of the conveyor belt, and is used to adsorb the two ends of the frame of the pressing tool. The conveying device according to claim 1 , wherein: The pressing tool includes a frame and a group of pressing pins arranged in an array on the frame; the pressing pin group is configured to press the solder ribbon onto the battery cell; the magnetic attraction component is arranged in the middle of the base plate for adsorbing the pressing pin group of the pressing tool.

7. The conveying device according to claim 6, characterized in that The magnetic attraction component is arranged at least in the middle of the bottom plate at the serial connection station; or, the magnetic attraction component is arranged at least in the middle of the bottom plate at the serial connection station and in the middle of the bottom plate at the input end of the conveyor belt.

8. The conveying device according to claim 7, characterized in that The magnetic suction component installed in the middle of the base plate is at least used to adsorb a row of pressure pins at the front end and a row of pressure pins at the rear end of the compacting tooling; wherein, the front end of the compacting tooling is the front end along the conveying direction of the conveyor belt, and the rear end of the compacting tooling is the rear end along the conveying direction of the conveyor belt.

9. The conveying device according to claim 1, characterized in that An adsorption hole is provided on the top surface of the bottom plate, and the adsorption hole is connected to the negative pressure source; and a through hole that can be connected to the adsorption hole is provided on the conveyor belt.

10. The conveying device according to claim 9, characterized in that An adhesive sticker covering the top surface of the bottom plate and the top surface of the magnetic attraction component is installed on the bottom plate, and an avoidance groove corresponding to the adsorption hole is opened on the adhesive sticker.

11. A serial connection device, characterized in that: The string connection device includes a cell loading device, a solder ribbon loading device, a tooling handling device, a string connection device, and a conveying device according to any one of claims 1 to 10; wherein: The battery cell loading device is configured to transport the battery cells to the conveying device; The solder ribbon feeding device is configured to transport the solder ribbon to the conveying device or the battery cells carried by the conveying device, so that the solder ribbon and the battery cells are stacked to form a battery string to be connected in series; The tool handling device is configured to carry the pressing tool to the battery cell carried by the conveying device and press the welding ribbon onto the battery cell; The conveying device is configured to convey the battery strings to be connected in series and the pressing tool to the stringing station below the stringing device; The string connection device is configured to string the welding ribbon and the battery cells together to form a battery string at the string connection station.

Images