A stringer and a stringing method

Abstract

The application discloses a stringing machine and a stringing method. The stringing machine comprises a stringing conveying device, the stringing conveying device comprising a conveying belt, a battery piece feeding device, a welding strip feeding device, a stringing device and a battery string discharging device. The battery piece feeding device and the welding strip feeding device stack battery pieces and welding strip groups in a predetermined manner on the conveying belt. The conveying belt drives the stacked battery pieces and welding strip groups to be conveyed to the stringing device and the battery string discharging device in sequence. The stringing device strings the stacked battery pieces and welding strip groups on the conveying belt into a battery string. The battery string discharging device removes the stringed battery string on the conveying belt from the conveying belt. The battery piece feeding device and the welding strip feeding device are arranged to stack the welding strip and the battery piece on the conveying belt. The stringed battery string is directly conveyed to the battery string discharging device through the arrangement of the conveying belt, so that the battery piece is prevented from being damaged due to the connection and conveying between the front and rear conveying belts.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic equipment technology, specifically relating to a series connection machine and a series connection method. Background Technology

[0002] Traditional stringing machines consist of two interconnected conveyor systems. The first conveyor system receives the battery cells and transports them to the welding station to be welded into battery strings. After welding, the strings are transported between the two conveyor systems, where a cutter cuts them to the required length. The second conveyor system then transports the strings to the bottom suction station, where the bottom suction station picks up the battery strings, flips them over, and passes them to the top suction station. The top suction station picks up the battery strings and places them at the unloading station to discharge them.

[0003] However, current back-contact battery strings are produced individually, with no continuity between the two strings. This eliminates the need for cutting. Furthermore, back-contact battery cells are typically attached face-down directly to the conveyor during production. The arrangement of the two conveyor devices means that the front of the battery cells needs to slide between them during transport, which can easily cause scratches on the surface of the cells and affect the quality of the battery strings. Summary of the Invention

[0004] To address the problems in related technologies, this application provides a series connection machine capable of continuous production and unloading of battery strings, avoiding damage to the battery cells caused by the transfer of battery strings between production and unloading stations. It also provides a series connection method capable of connecting, cooling, and conveying battery strings.

[0005] To address the aforementioned problems, this application provides a stringing machine, which includes a stringing conveyor device comprising a conveyor belt. The stringing machine further includes a cell feeding device and a welding strip feeding device disposed upstream of the conveyor belt, and a stringing device and a battery string unloading device sequentially disposed along the conveyor belt's conveying direction. The cell feeding device provides cell sheets to the conveyor belt; the welding strip feeding device provides welding strips to the conveyor belt; the cell feeding device and the welding strip feeding device stack the cell sheets and welding strips on the conveyor belt in a predetermined manner; the conveyor belt sequentially transports the stacked cell sheets and welding strips to the stringing device and the battery string unloading device; the stringing device strings the stacked cell sheets and welding strips on the conveyor belt into battery strings; and the battery string unloading device removes the stringed battery strings from the conveyor belt.

[0006] The installation of the cell feeding device and the welding strip feeding device enables the welding strip and cell to be stacked on the conveyor belt. The conveyor belt enables the cell and welding strip to be received and transported. The stringing device enables the cell and welding strip to be welded into a string. At the same time, the conveyor belt enables the stringed cells to be directly transported to the string unloading device, avoiding cell damage caused by the connection and transport of the string between two conveyor belts.

[0007] Preferably, the series conveying device further includes a support roller, a drive roller, a heating base plate, and a drive device; the conveyor belt is fitted onto the support roller and the drive roller, and the drive roller is used to drive the conveyor belt to rotate; the drive end of the drive device is connected to the drive roller to drive the drive roller to rotate; the heating base plate is located below the conveying surface of the first half of the conveyor belt, and the heating base plate is used to support the conveyor belt and heat the battery cells conveyed on the conveyor belt; the conveyor belt is provided with through holes, and the heating base plate is provided with adsorption holes, and the heating base plate adsorbs and positions the battery cells at a predetermined position on the conveyor belt through the adsorption holes and through holes; the support base plate is located below the conveying surface of the second half of the conveyor belt, and the support base plate is used to support the conveyor belt.

[0008] The conveyor belt is supported by the support rollers, driven by the drive rollers, supported and heated by the heating base plate, and the battery cells and welding strips are positioned by the combination of the through holes on the conveyor belt and the adsorption holes on the heating base plate.

[0009] Preferably, the support base plate is provided with a negative pressure hole and a negative pressure switch. The negative pressure hole is used to adsorb and position the battery string at a predetermined position on the conveyor belt; the negative pressure switch is used to control the ventilation and de-ventilation of the negative pressure hole.

[0010] The negative pressure holes on the support base plate enable the positioning and conveying of the battery strings at the discharge station. The negative pressure switch controls the negative pressure holes. When the battery string unloading device moves the battery string, the negative pressure switch closes, releasing the battery string. When the battery string is conveyed from the stringing device to the battery string unloading device, the negative pressure switch opens, and the support base plate holds the battery string at a specific position on the conveyor belt, preventing the battery string from shifting during conveyor belt transport.

[0011] Preferably, the conveyor belt is a Teflon belt or a steel belt.

[0012] Using Teflon belts for the conveyor belt can extend its service life and prevent damage from high temperatures. Teflon belts also have anti-stick properties, making them easy to clean. Using steel belts for the conveyor belt facilitates guidance and allows for better belt alignment.

[0013] Preferably, multiple heating plates are arranged in parallel, and the temperature of each heating plate can be adjusted individually.

[0014] The individually adjustable temperature of the heating base plate allows for gradual heating of the battery string before it is delivered to the stringing device, preventing damage caused by direct contact of the battery cells with high temperatures.

[0015] Preferably, the heating base plate is provided with a heating section, a cooling section and a temperature measuring section; the heating section is used to heat the base plate, the temperature measuring section is used to sense the temperature of the heated base plate, and the cooling section is used to cool the heated base plate.

[0016] The heating base plate is equipped with a heating section, a cooling section, and a temperature measuring section, which enables precise and rapid temperature adjustment.

[0017] Preferably, the stringing machine further includes a strip processing device for processing the strip segments into strip groups. The strip processing device provides strip groups to the strip feeding device. The strip processing device includes multiple first strip clamping assemblies, multiple second strip clamping assemblies, multiple first cutters, multiple second cutters, a first moving device, a second moving device, and a third moving device. The first strip clamping assemblies are used to clamp the odd-numbered strips in the strip segment, and the second strip clamping assemblies are used to clamp the even-numbered strips in the strip segment. The multiple first strip clamping assemblies are mounted on the first moving device. A movable device is used to adjust the spacing of a plurality of first solder strip clamping assemblies, and a first cutter for cutting the odd-numbered solder strips is provided between two adjacent first solder strip clamping assemblies; a plurality of second solder strip clamping assemblies are mounted on a second movable device, and the second movable device is used to adjust the spacing of the plurality of second solder strip clamping assemblies, and a second cutter for cutting the even-numbered solder strips is provided between two adjacent second solder strip clamping assemblies; a first movable device or a second movable device is mounted on a third movable device, and the third movable device is used to drive the first movable device or the second movable device to move relative to each other.

[0018] The first and second welding strip clamping components enable the clamping, misalignment, and spacing of the welding strip. The first and second cutters enable the welding strip segments to be cut at predetermined positions to form multiple welding strip groups required for producing battery strings.

[0019] Preferably, the stringing machine further includes a tooling feeding device, which includes a tooling conveying device and a tooling unloading device; the tooling conveying device and the stringing conveying device are arranged in parallel, and the tooling unloading device is arranged between the stringing device and the battery string unloading device; the tooling unloading device is used to transport and place the tooling on the battery string as a whole to the tooling conveying device in one go, and the tooling conveying device is used to convey the tooling to the welding strip feeding device; the welding strip feeding device grabs the tooling and welding strip assembly and places it on the battery cells carried on the conveyor belt.

[0020] The tooling feeding device enables the recycling of tooling, the welding strip feeding device grasps the tooling and welding strip group to realize the feeding and positioning of welding strip, and the tooling unloading device transports the whole string to the tooling conveyor device, which can improve the handling efficiency of tooling, while extending the dwell time of tooling on the battery string and improving the string connection quality of battery string.

[0021] Preferably, the stringing machine further includes a battery string detection device, and the battery string unloading device further includes a rotating part for driving the battery string to rotate; the battery string unloading device drives the battery string to move to the battery string detection device, the rotating part drives the battery string to rotate toward the battery string detection device, and the battery string detection device detects the battery string.

[0022] The battery string feeding device enables the feeding of battery strings, and the rotating part enables the battery string to be rotated to the battery string detection device for detection.

[0023] This application also provides a stringing method using the aforementioned stringing machine. The stringing method includes: controlling a cell feeding device to place cells on a conveyor belt at predetermined intervals; controlling a welding ribbon feeding device to stack welding ribbons onto the cells to form a battery string; controlling a conveyor belt to transport the battery string to a stringing device for stringing; controlling a conveyor belt to move the stringed battery string to a cooling station after the stringing device for cooling; and controlling a conveyor belt to transport the cooled battery string to a battery string unloading fixture for unloading.

[0024] The conveyor belt enables the transport of battery strings, cooling of the connected battery strings, and unloading of the cooled battery strings. When the battery strings are connected in series by the connecting device, the battery strings at the cooling station can be cooled simultaneously, which extends the cooling time of the battery strings and avoids damage caused by rapid heating and cooling of the battery strings.

[0025] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0027] Figure 1 This is a schematic diagram of a serial converter structure provided in one embodiment of this application;

[0028] Figure 2 This is a three-dimensional schematic diagram of a serial converter structure provided in one embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the welding strip processing device in an embodiment of the present utility model;

[0030] Figure 4 for Figure 3 A magnified view of region A in the image;

[0031] Figure 5 for Figure 3 A magnified view of region B in the image.

[0032] The accompanying figure is labeled as follows:

[0033] 1. Conveyor belt; 2. Welding strip feeding device; 3. Series connection device; 4. Battery string unloading device; 5. Welding strip processing device; 511. First welding strip clamping assembly; 512. First cutter; 513. First moving device; 521. Second welding strip clamping assembly; 522. Second cutter; 523. Second moving device; 531. Third moving device; 6. Tooling conveying device; 7. Tooling unloading device. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0035] This application provides a serial converter, such as Figure 1 and Figure 2 As shown, the stringing machine includes a stringing conveyor device, which includes a conveyor belt 1. The stringing machine also includes a cell feeding device and a welding strip feeding device 2 located in front of the conveyor belt 1, as well as a stringing device 3 and a battery string unloading device 4 arranged sequentially along the conveying direction of the conveyor belt 1. The cell feeding device provides cell sheets to the conveyor belt 1; the welding strip feeding device 2 provides welding strips to the conveyor belt 1; the cell feeding device and the welding strip feeding device 2 stack the cell sheets and welding strips on the conveyor belt 1 in a predetermined manner; the conveyor belt 1 drives the stacked cell sheets and welding strips to be conveyed sequentially to the stringing device 3 and the battery string unloading device 4; the stringing device 3 strings the cell sheets and welding strips stacked on the conveyor belt 1 into battery strings; the battery string unloading device 4 removes the battery strings connected in series from the conveyor belt 1.

[0036] In one implementation, the series connection device 3 can be implemented using an infrared lamp box for welding, where the infrared lamps in the infrared lamp box heat and weld the battery cells and solder strips into a string. Alternatively, the series connection device 3 can be implemented using a hot press plate to press and connect the battery cells and solder strips into a battery string. Of course, the series connection device 3 can also be implemented using a light irradiation method, where photosensitive adhesive pre-coated on the battery cells or solder strips is irradiated to cause the photosensitive adhesive to bond the solder strips and battery cells into a battery string.

[0037] In one implementation, the cell feeding device first picks up the cells needed for the entire battery string and places them above the conveyor belt according to the inter-string spacing. Then, the ribbon feeding device places the ribbon sets needed for the entire battery string production onto the cells, such that the latter half of the i-th ribbon set is stacked on the i-th cell, and the first half of the i-th ribbon set is stacked on the (i-1)-th cell, where i is any natural number greater than 1 and less than N+1. In actual production, the number of cells required for a battery string varies from 3 to 20, specifically 6, 7, 8, 9, 10, 11, 12, 13, 16, 18, etc. Of course, if the number of cells is too large, the cell feeding device and the ribbon feeding device can also provide the cells and ribbon sets needed for half a battery string at once.

[0038] The battery cell feeding device and the welding strip feeding device 2 enable the welding strip and battery cells to be stacked on the conveyor belt 1. The conveyor belt 1 enables the battery cells and welding strip to be received and transported. The stringing device 3 enables the battery cells and welding strip to be welded into a string. At the same time, the conveyor belt 1 enables the stringed battery cells to be directly transported to the battery string unloading device 4, avoiding damage to the battery cells caused by the connection and transport of the battery string between the two conveyor belts 1.

[0039] In one implementation, the tandem conveying device further includes a support roller, a drive roller, a heating base plate, a support base plate, and a drive device; the conveyor belt 1 is mounted on the support roller and the drive roller, the support roller is used to support the conveyor belt 1, and the drive roller is used to drive the conveyor belt 1 to rotate; the drive end of the drive device is connected to the drive roller to drive the drive roller to rotate, and in one implementation, the drive device can be a motor.

[0040] A heating base plate is positioned below the conveyor surface of the first half of conveyor belt 1. The heating base plate supports conveyor belt 1 and heats the battery cells conveyed on it. Conveyor belt 1 has through holes, and the heating base plate has suction holes. The heating base plate uses the suction holes and through holes to suction and position the battery cells at a predetermined position on conveyor belt 1. During conveyor belt 1 operation, the battery cells move towards the predetermined position. A negative pressure device connected to the suction holes can be directly installed on the heating base plate, and can be connected to the negative pressure device via a connecting pipe. A support base plate is positioned below the conveyor surface of the second half of conveyor belt 1. The support base plate supports conveyor belt 1. To ensure smooth operation of conveyor belt 1, the upper surfaces of the heating base plate and the support base plate are on the same horizontal plane.

[0041] The conveyor belt 1 is supported by the support rollers, driven by the drive rollers, supported and heated by the heating base plate, and the battery cells and welding strips are adsorbed and positioned by the cooperation between the through holes on the conveyor belt 1 and the adsorption holes on the heating base plate.

[0042] In one implementation, a negative pressure hole and a negative pressure switch are provided on the support base plate. The negative pressure hole is used to adsorb and position the battery string at a predetermined position on the conveyor belt 1; the negative pressure switch is used to control the ventilation and de-ventilation of the negative pressure hole.

[0043] The positioning and conveying of the battery string at the discharge station are achieved by setting negative pressure holes on the support base plate. The negative pressure holes are controlled by setting negative pressure switches. When the battery string unloading device 4 is transporting the battery string, the negative pressure switch is closed to release the battery string. When the battery string is conveyed from the stringing device 3 to the battery string unloading device 4, the negative pressure switch is opened, and the support base plate attracts the battery string to a specific position on the conveyor belt 1 to prevent the battery string from shifting when the conveyor belt 1 is conveying the battery string.

[0044] In one implementation, the conveyor belt 1 is a Teflon belt or a steel belt.

[0045] Using a Teflon belt for conveyor belt 1 can extend its service life and prevent it from being damaged by high temperature. At the same time, the Teflon belt has anti-stick properties, making it easy to clean. Using a steel belt for conveyor belt 1 can facilitate the guidance of conveyor belt 1 and better correct its deviation.

[0046] In one implementation, multiple heating base plates are arranged in parallel, and the temperature of each heating base plate can be adjusted independently. The heating base plates are arranged sequentially below the conveying surface of the conveyor belt 1 along the conveying direction of the conveyor belt 1. While supporting the conveyor belt 1, they can also heat the battery cells conveyed on the conveyor belt 1. At the same time, in order to avoid the temperature of the battery cells rising or falling suddenly, the heating base plates can be set to increase in temperature sequentially.

[0047] The individually adjustable temperature setting of the heating base plate enables gradual heating of the battery string before it is delivered to the series connection device 3, avoiding damage such as cracking caused by direct contact of the battery cells with high temperatures.

[0048] In one implementation, the heating base plate is internally provided with a heating section, a cooling section, and a temperature measuring section; the heating section is used to heat the base plate, the temperature measuring section is used to sense the temperature of the heated base plate, and the cooling section is used to cool the heated base plate. In another implementation, the heating section can be a heating rod, the cooling section can be an air pipe, and the temperature measuring section can be a thermocouple.

[0049] The heating base plate is equipped with a heating section, a cooling section, and a temperature measuring section, which enables precise and rapid temperature adjustment.

[0050] like Figure 3 , Figure 4 and Figure 5 As shown, in one implementation, the tandem welding machine further includes a welding strip processing device 5 for processing welding strip segments into welding strip groups. The welding strip processing device 5 is used to provide welding strip groups to the welding strip feeding device 2. The welding strip processing device 5 includes multiple first welding strip clamping assemblies 511, multiple second welding strip clamping assemblies 521, multiple first cutters 512, multiple second cutters 522, a first moving device 513, a second moving device 523, and a third moving device 531. The first welding strip clamping assemblies 511 are used to clamp the odd-numbered welding strips in the welding strip segment, and the second welding strip clamping assemblies 521 are used to clamp the even-numbered welding strips in the welding strip segment. The multiple first welding strip clamping assemblies 511 are mounted on the first moving device 513. The moving device 513 is used to adjust the spacing of the plurality of first solder strip clamping assemblies 511. A first cutter 512 for cutting the odd-numbered solder strips is provided between two adjacent first solder strip clamping assemblies 511. A plurality of second solder strip clamping assemblies 521 are mounted on a second moving device 523. The second moving device 523 is used to adjust the spacing of the plurality of second solder strip clamping assemblies 521. A second cutter 522 for cutting the even-numbered solder strips is provided between two adjacent second solder strip clamping assemblies 521. The first moving device 513 or the second moving device 523 is mounted on a third moving device 531. The third moving device 531 is used to drive the first moving device 513 or the second moving device 523 to move relative to each other.

[0051] Several first solder strip clamping assemblies 511 cooperate to clamp all the odd-numbered solder strips of multiple solder strips. A first solder strip cutter is provided between each adjacent first solder strip clamping assembly 511. Each first solder strip cutter is used to cut all the odd-numbered solder strips at the corresponding position to obtain several first solder strip groups.

[0052] Several second solder strip clamping assemblies 521 cooperate to clamp all the even-numbered solder strips of multiple solder strips. A second solder strip cutter is provided between each adjacent second solder strip clamping assembly 521. Each second solder strip cutter is used to cut all the even-numbered solder strips at the corresponding position to obtain several second solder strip groups.

[0053] Before all the odd-numbered solder strips are cut, a number of first solder strip clamping assemblies 511 and a number of second solder strip clamping assemblies 521 are moved relative to each other in the first horizontal direction. The first solder strip clamping assemblies 511 can be moved by a third moving device 531 or the second solder strip clamping assemblies 521 can be moved by a third moving device 531, so that all the odd-numbered solder strips are staggered from all the even-numbered solder strips by a predetermined distance in the solder strip length direction.

[0054] After all the odd-numbered solder strips are cut, each first solder strip clamping component 511 clamps a corresponding first solder strip group. Each first solder strip clamping component 511 is separated by a predetermined distance along the length direction of the solder strip under the drive of the first moving device 513, so as to implement the separation of each group of first solder strips.

[0055] After all even-numbered weld strips are cut, each second weld strip clamping assembly 521 clamps a corresponding second weld strip group. Driven by the second moving device 523, each second weld strip clamping assembly 521 is separated by a predetermined distance along the length direction of the weld strip to implement the separation of each group of second weld strips.

[0056] In one implementation, both the first ribbon clamping assembly 511 and the second ribbon clamping assembly 521 include multiple clamping claws arranged in parallel along the direction perpendicular to the length of the ribbon, and each clamping claw is used to clamp one ribbon.

[0057] In one implementation, the third moving device 531 of the solder strip processing device 5 is a staggered slide rail, the first moving device 513 is a first solder strip group spacing slide rail, and the second moving device 523 is a second solder strip group spacing slide rail.

[0058] The misaligned slide rail is set on the base, and the first strip group is slidably connected to the misaligned slide rail. The first strip clamping assembly 511 and the first cutter 512 are both connected to the first strip group slid slide rail.

[0059] The second strip group spacing slide rail is set on the base, and the second strip clamping assembly 521 and the second cutter 522 are both connected to the second strip group spacing slide rail.

[0060] Before all the odd-numbered weld strips are cut, the first weld strip group is controlled to slide along the offset slide rail so that all the odd-numbered weld strips are offset from all the even-numbered weld strips in the first horizontal direction by a predetermined distance.

[0061] After all the odd-numbered solder strips are cut, each first solder strip clamping assembly 511 and each first cutter 512 are controlled to slide apart along the first solder strip group spacing slide rail, thereby adjusting the spacing between each group of first solder strips to a predetermined spacing.

[0062] After all even-numbered solder strips are cut, the second solder strip clamping assemblies 521 and the second cutters 522 are controlled to slide apart along the second solder strip group spacing slide rails, thereby adjusting the spacing between each group of second solder strips to a predetermined spacing. The clamping, misalignment, and spacing of the solder strips are achieved by the arrangement of the first solder strip clamping assembly 511 and the second solder strip clamping assembly 521, and the cutting of the solder strip segments at predetermined positions by the arrangement of the first cutter 512 and the second cutter 522 is achieved to form multiple solder strip groups required for producing battery strings.

[0063] In one implementation, the stringing machine further includes a tooling feeding device, which includes a tooling conveying device 6 and a tooling unloading device 7. The tooling conveying device 6 is arranged in parallel with the stringing conveying device, and the tooling unloading device 7 is arranged between the stringing device 3 and the battery string unloading device 4. The tooling unloading device 7 is used to transport and place the tooling on the battery string as a whole onto the tooling conveying device 6 in one go. The tooling conveying device 6 is used to convey the tooling to the welding strip feeding device 2. The welding strip feeding device 2 grabs the tooling and welding strip assembly and places them onto the battery cells carried on the conveyor belt 1.

[0064] In one implementation, the welding strip feeding device 2 includes a conveying and moving device, which is equipped with a chuck for conveying the welding strip and an adsorption component for conveying the tooling. The welding strip feeding device 2 first moves to the tooling conveying device 6 to pick up a certain number of tooling, specifically the tooling required for the production of the entire battery string. Then, it moves above the welding strip processing device 5 to pick up the first and second welding strip groups processed by the welding strip processing device 5. Then, it moves with the tooling and the first and second welding strip groups to the battery cells placed on the conveyor belt 1, and puts down the welding strip corresponding to the main grid line or solder pad on the battery cell. The tooling is pressed on top of the welding strip, thereby completing the positioning of the welding strip on the main grid line or solder pad on the battery cell, which facilitates the string welding of subsequent processes.

[0065] In one implementation, the tooling unloading device 7 includes a tooling unloading moving device and an unloading component. The unloading moving device is used to drive the unloading component to move back and forth between the tooling conveying device 6 and the conveyor belt 1. The unloading component can be an electromagnet, a suction cup, or an openable and closable claw. The unloading component is used to adsorb or clamp the tooling.

[0066] Conveyor belt 1 transports the battery strings that have been connected in series by the stringing device 3 to the tooling unloading device 7, and simultaneously transports the next battery string to be connected to the stringing device 3 for connection. The tooling unloading device 7 can either directly remove the tooling from the connected battery string, or wait for the stringing device 3 to complete the connection of the next battery string before removing it from the tooling, thus extending the time for the battery string to be compressed and cooled by the tooling and further improving the connection quality.

[0067] The tooling feeding device enables the cyclical use of tooling, and the welding strip feeding device 2 grasps the tooling and welding strip group to realize the feeding and positioning of welding strip after feeding.

[0068] In one implementation, the stringing machine further includes a battery string detection device, and the battery string unloading device 4 further includes a rotating part for driving the battery string to rotate; the battery string unloading device 4 drives the battery string to move to the battery string detection device, the rotating part drives the battery string to rotate toward the battery string detection device, and the battery string detection device detects the battery string.

[0069] A specific battery string inspection device includes a light source and a camera. The light source illuminates the battery string, and the camera takes pictures of the battery string for inspection. The light source can be a linear laser, and the camera takes pictures of the laser-illuminated battery cells to detect microcracks. Alternatively, the light source can be infrared light, and the camera can be an infrared camera, used to inspect the appearance and defects of the battery cells illuminated by infrared light.

[0070] The battery string feeding device 4 enables the feeding of battery strings, and the rotating part enables the battery strings to be rotated to the battery string detection device for detection.

[0071] This application also provides a stringing method using the aforementioned stringing machine. The stringing method includes: controlling a cell feeding device to place cell sheets on a conveyor belt 1 at predetermined intervals; controlling a welding ribbon feeding device 2 to stack welding ribbons onto the cell sheets to form a battery string; controlling the conveyor belt 1 to transport the battery string to a stringing device 3 for stringing; controlling the conveyor belt 1 to move the stringed battery string to a cooling station after the stringing device 3 for cooling; and controlling the conveyor belt 1 to transport the cooled battery string to a battery string unloading fixture for unloading.

[0072] The conveyor belt 1 enables the conveying of battery strings, cooling of the connected battery strings, and unloading of the cooled battery strings. When the battery strings are connected in series by the connecting device 3, the battery strings at the cooling station can be cooled simultaneously, which extends the cooling time of the battery strings and avoids damage caused by rapid heating and cooling of the battery strings.

[0073] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention described herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

[0074] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A series connection device, characterized in that, The serial connector includes a serial conveyor device, which includes a conveyor belt. The stringing machine also includes a cell feeding device and a welding strip feeding device disposed in front of the conveyor belt, as well as a stringing device and a battery string unloading device disposed sequentially along the conveying direction of the conveyor belt. The battery cell feeding device provides battery cells onto the conveyor belt; The welding strip feeding device provides welding strip sets onto the conveyor belt; The battery cell feeding device and the welding strip feeding device stack the battery cells and the welding strip group on the conveyor belt in a predetermined manner; The conveyor belt carries the stacked battery cells and welding strips to the stringing device and the battery string unloading device in sequence; The stringing device strings together the battery cells and welding ribbons stacked on the conveyor belt to form a battery string; The battery string unloading device removes the battery strings connected in series on the conveyor belt from the conveyor belt; The series conveying device also includes a support roller, a drive roller, a heated base plate, a support base plate, and a drive device; The conveyor belt is mounted on the support roller and the drive roller, and the drive roller is used to drive the conveyor belt to rotate. The drive end of the drive device is connected to the drive roller to drive the drive roller to rotate; The heating base plate is located below the conveying surface of the front half of the conveyor belt. The heating base plate is used to support the conveyor belt and heat the battery cells conveyed on the conveyor belt. The conveyor belt is provided with through holes, and the heating base plate is provided with adsorption holes. The heating base plate adsorbs and positions the battery cells at a predetermined position on the conveyor belt through the adsorption holes and the through holes. The support base plate is located below the conveyor surface of the rear half of the conveyor belt, and the support base plate is used to support the conveyor belt.

2. The serial connector according to claim 1, characterized in that, The support base plate is equipped with negative pressure holes and a negative pressure switch. The negative pressure hole is used to magnetically position the battery string at a predetermined position on the conveyor belt; The negative pressure switch is used to control the airflow and shut-off of the negative pressure hole.

3. The serial connector according to claim 1, characterized in that, The conveyor belt is a Teflon belt or a steel belt.

4. The serial connector according to claim 1, characterized in that, Multiple heating plates are arranged in parallel, and the temperature of each heating plate can be adjusted individually.

5. The serial connector according to claim 1, characterized in that, The heating base plate is internally equipped with a heating section, a cooling section, and a temperature measuring section; The heating unit is used to heat the base plate, the temperature measuring unit is used to sense the temperature of the heated base plate, and the cooling unit is used to cool the heated base plate.

6. The serial connector according to claim 1, characterized in that, The stringing machine also includes a solder strip processing device for processing solder strip segments into solder strip groups, the solder strip processing device being used to provide the solder strip groups to the solder strip feeding device. The welding strip processing device includes multiple first welding strip clamping assemblies, multiple second welding strip clamping assemblies, multiple first cutters, multiple second cutters, a first moving device, a second moving device, and a third moving device; The first solder strip clamping assembly is used to clamp the odd-numbered solder strips in the solder strip segment, and the second solder strip clamping assembly is used to clamp the even-numbered solder strips in the solder strip segment; Multiple first welding strip clamping assemblies are mounted on the first moving device. The first moving device is used to adjust the spacing between the multiple first welding strip clamping assemblies. A first cutter for cutting the odd-numbered welding strips is provided between two adjacent first welding strip clamping assemblies. Multiple second welding strip clamping assemblies are mounted on the second moving device, which is used to adjust the spacing between the multiple second welding strip clamping assemblies. A second cutter for cutting the even-numbered welding strips is provided between two adjacent second welding strip clamping assemblies. The first or second mobile device is mounted on the third mobile device, and the third mobile device is used to drive the first or second mobile device to move relative to each other.

7. The serial connector according to claim 1, characterized in that, The tandem machine also includes a tooling feeding device, which includes a tooling conveying device and a tooling unloading device. The tooling conveying device and the series conveying device are arranged in parallel, and the tooling unloading device is arranged between the series device and the battery string unloading device. The tooling unloading device is used to transport and place the tooling on the battery string as a whole to the tooling conveying device in one go. The tooling conveying device is used to convey the tooling to the welding strip feeding device. The welding strip feeding device grabs the tooling and the welding strip assembly and places them onto the battery cells carried on the conveyor belt.

8. The serial connector according to claim 1, characterized in that, The stringing machine also includes a battery string detection device, and the battery string unloading device also includes a rotating part for driving the battery string to rotate. The battery string feeding device moves the battery string to the battery string detection device, and the rotating part rotates the battery string toward the battery string detection device. The battery string detection device detects the battery string.

9. A series connection method, wherein the series connection method employs a series connection machine as described in any one of claims 1-8, characterized in that, The concatenation method includes: The control unit for feeding solar cells places the solar cells on the conveyor belt at predetermined intervals; The control strip feeding device stacks the strips onto the battery cells to form a battery string; The conveyor belt is controlled to transport the battery string to the stringing device for stringing. The conveyor belt is controlled to move the connected battery string to the cooling station after the connecting device for cooling. The conveyor belt is controlled to transport the cooled battery string to the battery string unloading device for unloading.

Images