Battery string forming device and method

Abstract

The invention provides a battery string forming device and method, the battery string forming device comprises a series connection conveying line, a carrying device, a welding strip arranging device and a series connection device, a conveying path of the series connection conveying line is provided with a battery piece placing position, a temporary storage position and a welding strip placing position, and the series connection conveying line is configured to convey battery pieces in a stepping mode. When the ith battery piece is stepped to the solder strip placement position, the solder strip arrangement device drags the ith solder strip group to the ith battery piece, and the tail end of the ith solder strip group is put on the connecting strip on the (i + 1) th battery piece at the cache position; the carrying device places the ith hold-down tool on the ith welding strip group and places the (i + 2) th battery piece at the battery piece placing position, and the hold-down tools are used for tightly pressing the welding strip groups on the corresponding battery pieces; and the series connection device fixes the welding strip group to the corresponding battery piece. According to the invention, automatic bunching of the battery pieces with the solder strips on the first surfaces is realized, and the bunching efficiency of the battery pieces is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production, and more particularly to a battery stringing device and method. Background Art

[0002] As Figure 1 shown, in the existing battery string, adjacent two battery wafers 500 are connected in series by a continuous long solder ribbon group 200. The front section of the long solder ribbon group 200 is connected to the back surface of the front-side battery wafer 500, and the rear section of the long solder ribbon group 200 is partially connected to the front surface of the rear-side battery wafer 500. During the stringing process, the battery wafers 500 and the long solder ribbon group 200 are alternately stacked on a welding conveyor line, and then the long solder ribbon group 200 is fixed to the front and / or back surfaces of the corresponding battery wafers through a stringing device.

[0003] As Figure 2 shown, currently in the industry, a new type of battery wafer 100 has emerged. A group of solder ribbons 101 have been pre-welded on its first surface (such as the back surface), and a group of solder ribbons 101 on the first surface extend out of the battery wafer 100 and are interconnected by a connecting bar 102. The connecting bar 102 is, for example, a conductive copper bar. For this type of battery wafer 100, during the subsequent stringing process, a solder ribbon group (the length of which is about half of that of the long solder ribbon group 200) needs to be welded to the second surface of the battery wafer 100, and the tail end of the solder ribbon group is connected to the connecting bar 102 on the adjacent battery wafer. The existing battery stringing method is difficult to implement automatic stringing for this type of battery wafer. Summary of the Invention

[0004] In view of the above technical problems, the present application first provides a battery stringing device, and its detailed technical solution is as follows:

[0005] A battery stringing device for connecting N battery wafers with a group of solder ribbons on their first surfaces in series to form a battery string. All the solder ribbons on the first surface of the battery wafer extend out and are interconnected by a connecting bar. The battery stringing device includes a stringing conveyor line, a handling device, a solder ribbon arranging device, and a stringing device, wherein:

[0006] Continuous battery wafer placement positions, buffer positions, and solder ribbon placement positions are provided on the conveying path of the stringing conveyor line. The stringing conveyor line is configured to step-convey the battery wafers with their first surfaces facing downwards, so that the battery wafers located at the battery wafer placement positions step to the buffer positions and the solder ribbon placement positions in sequence;

[0007] When the i-th cell steps to the solder tape placement position, the solder tape dispensing device is configured to pull the i-th solder tape group onto the i-th cell located at the solder tape placement position, and cause the tail end of the i-th solder tape group to be placed on the connection bar of the (i + 1)-th cell located at the buffer position; the handling device is configured to place the i-th press tool on the i-th solder tape group, and place the (i + 2)-th cell with its first surface facing down at the cell placement position, and the press tool is used to press the solder tape group against the corresponding cell; where 1 ≤ i ≤ N - 2;

[0008] The series connection device is arranged downstream of the solder tape placement position and is configured to fix the solder tape group to the corresponding cell.

[0009] Using the battery stringing device provided by the present application, during the stringing process, the stringing conveyor line sequentially steps the cells to the solder tape placement position, and the solder tape dispensing device pulls the solder tape group onto the cell at the solder tape placement position, and causes the tail end of the solder tape group to be placed on the connection bar of the cell at the buffer position, thereby completing the laying and stringing of the cells and the solder tape group. In addition, during the laying and stringing process, the handling device places the press tool on the solder tape group to achieve pressing and positioning of the solder tape group, ultimately ensuring the stringing quality of the cells.

[0010] The battery stringing device provided by the present application realizes the automatic stringing of cells with solder tapes on the first surface, improves the stringing efficiency of such cells, and ensures the stringing quality.

[0011] In some embodiments, the handling device includes a first driving mechanism, a first mounting bracket, a first suction component, and a second suction component, where: the first mounting bracket is connected to the driving end of the first driving mechanism; the first suction component and the second suction component are arranged side by side and at intervals on the first mounting bracket; the first driving mechanism is at least configured to drive the first mounting bracket to translate and lift, so as to drive the first suction component to suck the cell and place the sucked cell with its first surface facing down at the cell placement position; and drive the second suction component to suck the press tool and place the sucked press tool on the solder tape group located at the solder tape placement position to press the solder tape group against the corresponding cell; the distance between the first adsorption component and the second adsorption component is not less than the length of a cell in the conveying direction of the stringing conveyor line.

[0012] By arranging the handling device to include a first suction component and a second suction component, the handling device can not only suck the battery cells and place the sucked battery cells at the battery cell placement position, but also suck the pressing tool and place the sucked pressing tool on the solder tape group located at the solder tape placement position. In particular, by setting the distance between the first adsorption component and the second adsorption component to be not less than the length of a battery cell in the conveying direction of the series connection conveying line, the handling device can simultaneously place the sucked battery cell and pressing tool at the battery cell placement position and on the solder tape group located at the solder tape placement position respectively, thereby improving the battery stringing efficiency.

[0013] In some embodiments, the distance between the first adsorption component and the second adsorption component is configured to be adjustable, and at least one of the first adsorption component and the second adsorption component is arranged on the first mounting bracket in a position-adjustable manner through the waist-shaped hole.

[0014] During the stringing process, the distance between the first adsorption component and the second adsorption component can be adaptively adjusted according to the actual size of the battery cell to ensure that when the first adsorption component places the sucked battery cell at the battery cell placement position, the second adsorption component can synchronously place the sucked tooling on the solder tape group located at the solder tape placement position.

[0015] In some embodiments, the battery stringing device further includes a solder tape supply device arranged on the front side of the input end of the series connection conveying line. The solder tape supply device is configured to cut several solder tapes released from the solder tape reel to obtain a solder tape group with a predetermined length; the solder tape laying device is configured to obtain the solder tape group from the solder tape supply device and place the solder tape group on the battery cell at the solder tape placement position.

[0016] By arranging the solder tape supply device on the front side of the input end of the series connection conveying line, the automatic preparation and supply of the solder tape group are realized, and the solder tape laying device can obtain the solder tape group required for stringing nearby, thereby improving the stringing efficiency.

[0017] In some embodiments, the battery stringing device further includes a cartridge conveying device, a chip picking device and a loading conveying line, wherein: the cartridge conveying device is configured to convey the cartridge filled with battery cells to the chip picking position; the chip picking device is configured to pick up the battery cells from the cartridge located at the chip picking position and place the battery cells with the first surface facing down on the loading conveying line; the loading conveying line is configured to convey the battery cells to the side of the battery cell placement position, and the handling device is configured to pick up the battery cells from the loading conveying line.

[0018] Through the cooperation of the cartridge conveying device, the chip picking device and the loading conveying line, the automatic loading of the battery cells is realized, and the handling device can obtain the battery cells required for stringing nearby, thereby improving the stringing efficiency.

[0019] In some embodiments, the cartridge conveying device includes a first conveying line, a second conveying line, and a transfer conveying line, wherein: the first conveying line is disposed above the second conveying line, and the conveying directions of the first conveying line and the second conveying line are opposite; the transfer conveying line is configured to lift between the output end of the first conveying line and the input end of the second conveying line, and dock with the output end of the first conveying line or the input end of the second conveying line; the first conveying line is configured to convey the cartridge filled with solar cells to the sheet taking position, and convey the emptied cartridge to the transfer conveying line docked with the output end of the first conveying line; the transfer conveying line is configured to convey the emptied cartridge to the second conveying line when docked with the input end of the second conveying line; the second conveying line is used to output the emptied cartridge.

[0020] Through the conveyance of the first conveying line, the cartridge filled with solar cells can be automatically conveyed to the sheet taking position. Through the cooperation of the transfer conveying line and the second conveying line, the emptied cartridge can be output from the sheet taking position in a timely manner. In this way, it can be ensured that the next cartridge filled with solar cells can enter the sheet taking position in a timely manner, preventing the shortage of solar cells.

[0021] In some embodiments, the sheet taking device includes a second driving mechanism, a second mounting bracket, and at least one third suction component, wherein: the second mounting bracket is connected to the driving end of the second driving mechanism; the third suction component is disposed on the second mounting bracket; the second driving mechanism is configured to drive the second mounting bracket to translate and lift, so as to drive each third suction component to suck the solar cells from the cartridge, and place the sucked solar cells on the loading conveying line.

[0022] A sheet taking device with a simple structure is provided. It drives the third suction component to move through the second driving mechanism, so as to drive the third suction component to suck the solar cells from the cartridge, and place the sucked solar cells on the loading conveying line. By providing a plurality of third suction components, the sheet taking device can suck a plurality of solar cells from the cartridge and place the plurality of solar cells on the loading conveying line at the same time, thereby improving the feeding efficiency of the solar cells.

[0023] In some embodiments, the third suction component includes a suction component and a pressing unit. The suction component and the pressing unit are both connected to the second mounting bracket. The suction component is configured to adsorb the solar cells. When the suction component places the solar cells on the loading conveying line, the pressing unit is configured to press down the middle part of the solar cells to flatten the solar cells.

[0024] Since a set of welding tapes are pre - arranged on the first surface of the cell, the middle part of the second surface of the cell is prone to arch upward under the traction of the welding tapes, resulting in a decrease in the flatness of the cell. By setting the third suction component to include a suction component and a pressing unit, when the third suction component places the cell on the loading conveyor via the suction component, the pressing unit can press down the middle part of the cell, thereby flattening the cell and improving the flatness of the cell.

[0025] In some embodiments, the cell stringing device further includes a fixture conveyor line and a fixture removal device, wherein: the fixture conveyor line is configured to convey the fixture to the side of the welding tape placement position, and the handling device is configured to pick up the fixture from the fixture conveyor line; the fixture removal device is arranged downstream of the stringing device, and the fixture removal device is configured to place the fixture on the welding tape group back onto the fixture conveyor line after the welding tape group is fixed to the corresponding cell.

[0026] By setting the fixture conveyor line, the fixture is automatically conveyed to the side of the welding tape placement position, enabling the handling device to pick up the fixture nearby. By setting the fixture removal device, the fixture can be automatically placed back onto the fixture conveyor line after the welding tape group is fixed to the corresponding cell, so as to realize the recycling of the fixture.

[0027] In some embodiments, the cell stringing device further includes a first welding tape guiding device located at the welding tape placement position; the first welding tape guiding device at least includes a first guiding plate, the first guiding plate is located above the junction of the buffer position and the welding tape placement position, and there is a first gap for the cell to pass between the first guiding plate and the conveying surface of the stringing conveyor line; when the welding tape laying device pulls the welding tape group towards the welding tape placement position, the first guiding plate is configured to guide the welding tape group, and a number of first guiding grooves are arranged on the first guiding plate, and each first guiding groove is used to accommodate one welding tape in the welding tape group.

[0028] Through the guiding of the first guiding plate, it is ensured that the welding tape laying device can accurately pull and lay the welding tape group to the target position on the cell located at the welding tape placement position, preventing the welding tape group from generating a position offset.

[0029] In some embodiments, the first guide plate is configured to be able to move parallel to the conveying path of the serial conveyor line to achieve movement and switching between a guiding position close to the welding tape placement position and an avoidance position away from the welding tape placement position; the first welding tape guiding device also includes a first support plate and a second support plate located on both sides of the welding tape placement position, and the first support plate and the second support plate are configured to be able to synchronously lift and switch between the supporting position and the release position, wherein the supporting position is higher than the release position; after the welding tape device pulls the welding tape group to the battery cell located at the welding tape placement position, the tail end of the welding tape group is supported on the first guide plate located at the guiding position; the first support plate When the first support plate and the second support plate rise to the supporting position, they respectively support the two side end plates of the press placed on the welding ribbon group by the conveying device, so that the first type of pressure needles at both ends of the press do not contact the welding ribbon group, and the second type of pressure needles in the middle of the press press the welding ribbon group onto the battery cell, wherein, in the non-pressing state, the bottom surface of the first type of pressure needles is higher than the bottom surface of the second type of pressure needles; when the welding ribbon device releases the leading end of the welding ribbon group, the first guide plate is configured to move to the avoidance position to release the tail end of the welding ribbon group, and the first support plate and the second support plate are configured to synchronously descend to the releasing position, so that the first type of pressure needles at both ends of the press press the tail end and the leading end of the welding ribbon group onto the battery cell respectively.

[0030] After the welding tape group is pulled onto the battery cell at the welding tape placement position, the tail end of the welding tape group is supported on the first guide plate at the guide position, and the head end remains clamped by the welding tape cloth device. When the handling device places the press onto the welding tape group, the first support plate and the second support plate at the support position support and raise the two side end plates of the press, so that the first type of pressure needles at both ends of the press do not contact the welding tape group, and the second type of pressure needles in the middle of the press press the welding tape group onto the battery cell. When the welding tape cloth device releases the head end of the welding tape group and the first guide plate releases the tail end of the welding tape group, the first support plate and the second support plate are synchronously lowered to the release position, so that the first type of pressure needles at both ends of the press press respectively press the tail end and the head end of the welding tape group downward. In this way, the upturned ends of the welding tape group can be prevented from being bent and upturned by the press.

[0031] In some embodiments, the first welding ribbon guiding device further includes a first supporting arm, a second supporting arm, a first lifting assembly, a second lifting assembly, a first elastic pressing assembly, a second elastic pressing assembly and a third driving mechanism, wherein:

[0032] The first support arm and the second support arm are arranged on both sides of the serially connected conveyor line, and are both connected to the third driving mechanism in a transmission manner. The two ends of the first guide plate are respectively connected to the first support arm and the second support arm. The first support arm and the second support arm are sequentially provided with a first support surface and a second support surface in a direction away from the first guide plate, wherein the first support surface is higher than the second support surface.

[0033] The third driving mechanism is configured to drive the first support arm and the second support arm to move parallel to the conveying path of the tandem conveyor line, so as to drive the first guiding plate to move and switch between the guiding position and the avoiding position;

[0034] The first lifting assembly is slidably connected to the first side wall of the tandem conveyor line in a liftable manner, and the second lifting assembly is slidably connected to the second side wall of the tandem conveyor line in a liftable manner. The first support plate is connected to the first lifting assembly, and the second support plate is connected to the second lifting assembly;

[0035] The first elastic pressing assembly is connected to the first side wall of the tandem conveyor line, and the second elastic pressing assembly is connected to the second side wall of the tandem conveyor line;

[0036] When the first guiding plate moves to the guiding position, the first elastic pressing assembly is configured to elastically press the first lifting assembly against the first supporting surface of the first support arm, and the second elastic pressing assembly is configured to elastically press the second lifting assembly against the first supporting surface of the second support arm. The first support plate and the second support plate are located at the supporting position;

[0037] When the first guiding plate moves to the avoiding position, the first elastic pressing assembly is configured to elastically press the first lifting assembly against the second supporting surface of the first support arm, and the second elastic pressing assembly is configured to elastically press the second lifting assembly against the second supporting surface of the second support arm. The first support plate and the second support plate are located at the releasing position.

[0038] By setting the first solder tape guiding device, the linkage of the first support plate, the second support plate and the first guiding plate is realized. Specifically, when the third driving mechanism drives the first guiding plate to the guiding position through the first support arm and the second support arm, the first lifting assembly and the second lifting assembly rise under the jacking of the first support arm and the second support arm, so that the first support plate and the second support plate rise to the supporting position. When the third driving mechanism drives the first guiding plate to the avoiding position through the first support arm and the second support arm, the first lifting assembly and the second lifting assembly descend under the pushing of the first elastic pressing assembly and the second elastic pressing assembly, so that the first support plate and the second support plate descend to the releasing position. In this way, it is realized that only one driving mechanism needs to be set to synchronously drive the first guiding plate, the first support plate and the second support plate, reducing the driving cost. In addition, the action synchronization degree of the first guiding plate with the first support plate and the second support plate is improved, ensuring that when the first guiding plate switches to the guiding position, the first support plate and the second support plate switch to the supporting position, and when the first guiding plate switches to the avoiding position, the first support plate and the second support plate switch to the releasing position.

[0039] In some embodiments, the second lifting assembly has the same structure as the first lifting assembly, and the second elastic clamping assembly has the same structure as the first elastic clamping assembly; the first lifting assembly includes a slider and a roller, wherein the slider is slidably connected to the first side wall of the serial conveyor line via a vertical slide rail, the roller is arranged on the slider and supported on the first support arm, and the first support plate is connected to the top of the slider; the first elastic clamping assembly includes a pressure block and a spring, wherein the pressure block is fixed on the first side wall of the serial conveyor line and is located above the roller, the upper end of the spring abuts on the pressure block, and the lower end of the spring abuts on the slider; when the first guide plate moves from the avoidance position to the guide position, the roller slides from the second support surface of the first support arm to the first support surface of the first support arm, the slider slides upward, so that the first support plate rises to the support position, and the spring is compressed; when the first guide plate moves from the guide position to the avoidance position, the roller slides from the first support surface of the first support arm to the second support surface of the first support arm, the spring loses pressure and rebounds, pushing the slider to slide downward, so that the first support plate drops to the release position.

[0040] The first lifting assembly and the second lifting assembly are configured as a lifting structure consisting of a slider and a roller, so that the first lifting assembly and the second lifting assembly can smoothly slide up and down relative to the serial conveyor line, and smoothly slide horizontally along the supporting surfaces of the first support arm and the second support arm, thereby avoiding jamming and affecting the supporting stability of the first support plate and the second support plate.

[0041] In some embodiments, the battery stringing equipment also includes a second welding tape guide device, the second welding tape guide device includes a second guide plate and a fourth driving mechanism, wherein: the second guide plate is located above the serial conveyor line and in front of the first guide plate, and there is a second gap between the second guide plate and the conveying surface of the serial conveyor line for the battery cell to pass through; the second guide plate is transmission-connected to the fourth driving mechanism, and the fourth driving mechanism is configured to drive the second guide plate to move parallel to the conveying path of the serial conveyor line, so that the second guide plate moves and switches between a first intersection position away from the first guide plate and a second intersection position close to the first guide plate; when the second guide plate moves to the first intersection position, the welding tape group pulled by the cloth welding tape device falls onto the second guide plate, and when the second guide plate moves to the second intersection position, the welding tape group transitions to the first guide plate under the traction of the cloth welding tape device; a plurality of second guide grooves are arranged on the second guide plate, and each second guide groove is used to accommodate a welding tape in the welding tape group.

[0042] By providing a second guide plate driven by the fourth driving mechanism, it is achieved that when the cloth welding tape device pulls the welding tape group toward the first guide plate, the second guide plate can move toward the first guide plate synchronously with the cloth welding tape device to support the welding tape group from below, thereby achieving guided positioning of the welding tape group, and ultimately ensuring that each welding tape in the welding tape group can accurately enter the corresponding first guide groove on the first guide plate.

[0043] In some embodiments, the second welding tape guiding device also includes a third support arm and a fourth support arm, wherein: the third support arm and the fourth support arm are relatively arranged on both sides of the serial conveyor line, and are both transmission-connected to the fourth driving mechanism, and the two ends of the second guide plate are respectively connected to the third support arm and the fourth support arm; the fourth driving mechanism is configured to drive the third support arm and the fourth support arm to move parallel to the conveying path of the serial conveyor line, so as to drive the second guide plate to move and switch between the first intersection position and the second intersection position.

[0044] The two ends of the second guide plate are respectively connected to the third support arm and the fourth support arm, and the fourth driving mechanism drives the third support arm and the fourth support arm to move parallel to the conveying path of the serial conveyor line, thereby driving the second guide plate to move and switch between the first intersection position and the second intersection position, so that the second guide plate maintains a stable horizontal state, ensuring the guiding effect of the second guide plate on the welding strip group.

[0045] The second aspect of the present application also provides a battery series connection method, the detailed technical solution of which is as follows:

[0046] A battery stringing method is used to connect N battery cells with welding strips on the first surface into a battery string, wherein all welding strips on the first surface of the battery cell extend outward and are interconnected through a connecting strip, and the battery stringing method comprises:

[0047] After placing the first battery cell with the first surface facing downward at the battery cell placement position, the first battery cell is stepped forward to the cache position to vacate the battery cell placement position;

[0048] After placing the second battery cell with the first surface facing downward at the battery cell placement position, the first and second battery cells are stepped forward simultaneously, so that the second battery cell is stepped forward to the cache position, and the first battery cell is stepped forward to the solder strip placement position, leaving the battery cell placement position empty;

[0049] Set the initial value of i to 1, and determine whether i is greater than N-2. If i is not greater than N-2, pull the i-th solder ribbon group to the i-th battery cell at the solder ribbon placement position, and make the tail end of the i-th solder ribbon group overlap the connecting strip on the i+1-th battery cell at the cache position;

[0050] Placing the i-th presser on the i-th welding ribbon group, and placing the i+2-th battery cell with the first surface facing downward at the battery cell placement position;

[0051] All cells are stepped forward simultaneously, so that the i+2th cell is stepped forward to the cache position, and the i+1th cell is stepped forward to the solder strip placement position, leaving the cell placement position vacant; i+1 is changed to execute the step of determining whether i is greater than N-2;

[0052] If i is greater than N - 2, then the (N - 1)-th solder tape group is pulled to the (N - 1)-th solar cell located at the solder tape placement position, and the tail end of the (N - 1)-th solder tape group is placed on the connection bar of the N-th solar cell located at the buffer position;

[0053] The (N - 1)-th press tool is placed on the (N - 1)-th solder tape group;

[0054] The N-th solar cell is stepped forward to the solder tape placement position, the N-th solder tape group is pulled to the N-th solar cell, and the N-th press tool is placed on the N-th solder tape group;

[0055] Wherein: the solar cell placement position, the buffer position, and the solder tape placement position are successively and continuously arranged along the first direction;

[0056] Fix each solder tape group to the corresponding solar cell.

[0057] In the battery stringing device provided by the present application, during the stringing process, the solar cells are successively stepped and conveyed to the solder tape placement position. Whenever a solar cell reaches the solder tape placement position, the solder tape group is pulled to the solar cell at the solder tape placement position, and the tail end of the solder tape group is placed on the connection bar of the solar cell at the buffer position until the laying of the solar cells and the solder tape groups into a string is completed. In addition, during the laying into a string process, a press tool is placed on the solder tape group to realize the pressing and positioning of the solder tape group.

[0058] The battery stringing method provided by the present application realizes the automatic stringing of solar cells with solder tapes on the first surface, improves the stringing efficiency of such solar cells, and ensures the stringing quality.

[0059] In some embodiments, placing the i-th press tool on the i-th solder tape group is synchronously implemented with placing the first surface of the (i + 2)-th solar cell facing down at the solar cell placement position.

[0060] The simultaneous laying of the press tool and the solar cell is realized, thereby further improving the stringing efficiency of the solar cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic structural diagram of an existing battery string;

[0062] Figure 2 It is a schematic structural diagram of a solar cell with a solder tape fixedly connected to the first surface;

[0063] Figure 3 It is a schematic structural diagram of the battery stringing device in the embodiment of the present application;

[0064] Figure 4 It is a schematic diagram of the battery stringing process of the battery stringing device in the embodiment of the present application;

[0065] Figure 5 Schematic structural diagram of the handling device in the embodiment of the present application;

[0066] Figure 6 Schematic structural diagram of the chip picking device in the embodiment of the present application;

[0067] Figure 7 Schematic structural diagram of the fixture removal device in the embodiment of the present application;

[0068] Figure 8 Top view structural diagram of the first solder tape guiding device in the embodiment of the present application;

[0069] Figure 9 Schematic diagram of the supporting effect of the first solder tape guiding device on the fixture in the embodiment of the present application;

[0070] Figure 10 Bottom view structural diagram of the first solder tape guiding device in the embodiment of the present application;

[0071] Figure 11 Schematic structural diagram of the second solder tape guiding device and the first solder tape guiding device in the embodiment of the present application

[0072] Figure 12 Assembly schematic diagram of the second solder tape guiding device, the first solder tape guiding device and the series-connected conveyor line in the embodiment of the present application;

[0073] Figure 13 Schematic structural diagram of the solder tape laying device in the embodiment of the present application;

[0074] Figure 14 Cross-sectional view of the fixture used in the embodiment of the present application;

[0075] Figure 15 Schematic diagram of the cooperation working process of the first guide plate and the second guide plate in the embodiment of the present application.

[0076] Figures 1 to 15 It includes:

[0077] Series-connected conveyor line 1;

[0078] Handling device 2:

[0079] First mounting bracket 21, first suction component 22, second suction component 23;

[0080] Solder tape laying device 3:

[0081] Translation driving part 31, lifting driving part 32, clamping part 33;

[0082] Series connection device 4;

[0083] Welding tape supply device 5;

[0084] Cartridge conveying device 6:

[0085] First conveying line 61, second conveying line 62, transfer conveying line 63;

[0086] Chip picking device 7:

[0087] Second driving mechanism 71, second mounting bracket 72, third suction component 73, adsorption component 731,

[0088] Lower pressing unit 732, cylinder 7321, pressing plate 7322;

[0089] Loading conveying line 8;

[0090] Pressing tool conveying line 9;

[0091] Pressing tool removal device 10:

[0092] Fifth driving mechanism 1001, fourth suction component 1002;

[0093] First welding tape guiding device 110:

[0094] First guiding plate 111, first supporting plate 112, second supporting plate 113, first supporting arm 114, second supporting arm 115, first lifting component 116, second lifting component 117, first elastic pressing component 118, second elastic pressing component 119, third driving mechanism 1120, mounting block 1130, first supporting surface a, second supporting surface b, first guiding groove 1111, slider 1161, roller 1162, first translation driving module 1121, first connecting plate 1122;

[0095] Second welding tape guiding device 120:

[0096] Second guiding plate 121, fourth driving mechanism 122, third supporting arm 123, fourth supporting arm 124, second translation driving module 1221, second connecting plate 1222, second guiding groove 1211;

[0097] Battery cell placement position A, buffer position B, welding tape placement position C;

[0098] Battery cell 100, welding tape 101, connecting bar 102, long welding tape group 200, welding tape group 400;

[0099] Pressing tool 300: First type of pressing needle 301, second type of pressing needle 302. Specific implementation method

[0100] To make the above objects, features, and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0101] As described in the background art section, for a battery cell with a set of welding tapes pre-welded on the first surface (e.g., the back surface), during the subsequent stringing process, the welding tape set needs to be welded to the second surface of the battery cell, and the tail end of the welding tape set is connected to the connecting bar on the adjacent battery cell. The existing battery stringing methods are difficult to implement automatic stringing for this type of battery cell.

[0102] In view of this, the present application provides a battery stringing device for stringing Figure 2 the N battery cells 100 with a set of welding tapes 101 on the first surface shown in the figure into a battery string, and all the welding tapes 101 on the first surface of the battery cell 100 extend outwards and are interconnected by a connecting bar 102.

[0103] As Figures 3 to 4 shown, the battery stringing device of the present application includes a stringing conveyor line 1, a handling device 2, a welding tape laying device 3, and a stringing device 4, where:

[0104] Continuous battery cell placement positions A, buffer positions B, and welding tape placement positions C are provided on the conveying path of the stringing conveyor line 1. The stringing conveyor line 1 is configured to step-convey the battery cells 100 with the first surface facing downwards, so that the battery cells located at the battery cell placement position A step to the buffer position B and the welding tape placement position C in sequence.

[0105] When the i-th battery cell 100 steps to the welding tape placement position C, the welding tape laying device 3 is configured to pull the i-th welding tape set 400 onto the i-th battery cell 100 located at the welding tape placement position C, and make the tail end of the i-th welding tape set 400 rest on the connecting bar 102 of the (i + 1)-th battery cell 100 located at the buffer position B. The handling device 2 is configured to place the i-th pressing tool 300 onto the i-th welding tape set 400, and place the (i + 2)-th battery cell 100 with the first surface facing downwards at the battery cell placement position A. The pressing tool 300 is used to press the welding tape set 400 onto the corresponding battery cell 100; where 1 ≤ i ≤ N - 2.

[0106] The stringing device 4 is arranged after the welding tape placement position C and is configured to fix the welding tape set 400 to the corresponding battery cell 100.

[0107] To enable those skilled in the art to more clearly understand the working process of the battery stringing device in the embodiments of the present invention, the laying processes of the battery cells, the solder tape groups, and the pressing tools in the embodiments of the present invention will be described exemplarily below in conjunction with Figure 4 , taking N = 4 as an example (that is, the battery string to be obtained is composed of 4 battery cells 100), the laying processes of the battery cells, the solder tape groups, and the pressing tools in the embodiments of the present invention will be described exemplarily.

[0108] As shown in (a) of Figure 4 , the handling device 2 lays the first battery cell 100 with its first surface facing down at the battery cell placement position A.

[0109] As shown in (b) of Figure 4 , the series connection conveyor line 1 is controlled to step forward once, so that the first battery cell 100 steps forward to the buffer position B, vacating the battery cell placement position A. Subsequently, the handling device 2 lays the second battery cell 100 with its first surface facing down at the battery cell placement position A.

[0110] As shown in (c) of Figure 4 , the series connection conveyor line 1 is controlled to step forward once, so that the second battery cell 100 steps forward to the buffer position B, the first battery cell 100 steps forward to the solder tape placement position C, vacating the battery cell placement position A. Subsequently, the solder tape laying device 3 pulls the first solder tape group 400 to the first battery cell 100 located at the solder tape placement position C, and makes the tail end of the first solder tape group 400 rest on the connection bar 102 of the second battery cell 100 located at the buffer position B.

[0111] As shown in (d) of Figure 4 , the handling device 2 places the first pressing tool 300 on the first solder tape group 400, and places the third battery cell 100 with its first surface facing down at the battery cell placement position A. The pressing tool 300 is used to press the first solder tape group 400 onto the first battery cell 100.

[0112] As shown in (e) of Figure 4 , the series connection conveyor line 1 is controlled to step forward once, so that the third battery cell 100 steps forward to the buffer position B, the second battery cell 100 steps forward to the solder tape placement position C, vacating the battery cell placement position A. Subsequently, the solder tape laying device 3 pulls the second solder tape group 400 to the second battery cell 100 located at the solder tape placement position C, and makes the tail end of the second solder tape group 400 rest on the connection bar 102 of the third battery cell 100 located at the buffer position B.

[0113] As shown in (f) of Figure 4As shown in (f), the handling device 2 places the second press tool 300 onto the second solder tape group 400, and places the fourth solar cell 100 with its first surface facing down at the solar cell placement position A. The press tool 300 is used to press the second solder tape group 400 onto the second solar cell 100.

[0114] As Figure 4 shown in (g), the series connection conveyor line 1 is controlled to step forward once, so that the fourth solar cell 100 steps forward to the buffer position B, the third solar cell 100 steps forward to the solder tape placement position C, leaving the solar cell placement position A empty. Subsequently, the solder tape laying device 3 pulls the third solder tape group 400 onto the third solar cell 100 located at the solder tape placement position C, and makes the tail end of the third solder tape group 400 rest on the connection bar 102 of the fourth solar cell 100 located at the buffer position B.

[0115] As Figure 4 shown in (h), the handling device 2 places the third press tool 300 onto the third solder tape group 400. The press tool 300 is used to press the third solder tape group 400 onto the third solar cell 100.

[0116] As Figure 4 shown in (i), the series connection conveyor line 1 is controlled to step forward once, so that the fourth solar cell 100 steps forward to the solder tape placement position C. Subsequently, the solder tape laying device 3 pulls the fourth solder tape group 400 onto the fourth solar cell 100 located at the solder tape placement position C, and the handling device 2 places the fourth press tool 300 onto the fourth solder tape group 400. The press tool 300 is used to press the fourth solder tape group 400 onto the fourth solar cell 100.

[0117] Thus, the laying of the four solar cells 100 into a string is completed.

[0118] Finally, the solder tape group 400 is fixed to the corresponding solar cell 100 through the series connection device 4.

[0119] Using the solar cell stringing device provided by this application, during the stringing process, the series connection conveyor line 1 sequentially steps and conveys the solar cells 100 to the solder tape placement position C. The solder tape laying device 3 then pulls the solder tape group 400 onto the solar cell 100 at the solder tape placement position C, and makes the tail end of the solder tape group 400 rest on the connection bar 102 of the solar cell 100 at the buffer position B, thereby completing the laying and stringing of the solar cells 100 and the solder tape group 400. In addition, during the stringing process, the handling device 2 places the press tool 300 onto the solder tape group 400 to press and position the solder tape group 400, thereby ensuring the stringing quality.

[0120] The battery stringing device provided by the present application realizes the automatic stringing of the battery chips 100 with solder tapes on the first surface, improves the stringing efficiency of such battery chips 100, and ensures the stringing quality.

[0121] As Figure 5 shown, optionally, the handling device 2 includes a first driving mechanism (not shown in the figure), a first mounting bracket 21, a first suction component 22 and a second suction component 23, wherein: the first mounting bracket 21 is connected to the driving end of the first driving mechanism. The first suction component 22 and the second suction component 23 are arranged side by side and at intervals on the first mounting bracket 21. The first driving mechanism is at least configured to drive the first mounting bracket 21 to translate and lift, so as to drive the first suction component 22 to suck the battery chip 100, and place the sucked battery chip 100 with the first surface facing down at the battery chip placement position A, and drive the second suction component 23 to suck the pressing tool 300, and place the sucked pressing tool 300 on the solder tape group 400 located at the solder tape placement position C, so as to press the solder tape group 400 onto the corresponding battery chip 100. The distance between the first suction component 22 and the second suction component 23 is not less than the length of one battery chip 100 in the conveying direction of the series connection conveying line 1.

[0122] Specifically, under the drive of the first driving mechanism, the first suction component 22 and the second suction component 23 respectively suck a battery chip 100 to be placed and a pressing tool 300 to be placed. Subsequently, under the drive of the first driving mechanism, the first suction component 22 places the sucked battery chip 100 at the battery chip placement position A, and the second suction component 23 places the sucked pressing tool 300 on the solder tape group 400 at the solder tape placement position C.

[0123] Particularly, by setting the distance between the first suction component 22 and the second suction component 23 to be not less than the length of one battery chip 100 in the conveying direction of the series connection conveying line 1, the first suction component 22 and the second suction component 23 can simultaneously place the sucked battery chip 100 and pressing tool 300 at the battery chip placement position A and the solder tape group 400 located at the solder tape placement position C, thereby improving the battery stringing efficiency.

[0124] The first driving mechanism can adopt various existing driving devices capable of driving the first mounting bracket 21 to translate and lift. For example, the first driving mechanism is a robotic arm, and the first mounting bracket 21 is connected to the end of the robotic arm, and the robotic arm drives the first mounting bracket 21 to translate and lift. Another example is that the first driving mechanism includes a first translation driving part and a first lifting driving part. The first lifting driving part is connected to the driving end of the first translation driving part, and the first mounting bracket 21 is connected to the driving end of the first lifting driving part. The first translation driving part is used to drive the first mounting bracket 21 to translate, and the first lifting driving part is used to drive the first mounting bracket 21 to lift. The first translation driving part and the first lifting driving part can both adopt various existing types of linear driving modules, such as linear motor modules, ball screw modules, etc.

[0125] The first adsorption assembly 22 is, for example, a suction cup assembly composed of several suction cups. Since the material of the conventional press tool 300 is generally magnetic metal (such as stainless steel), the second adsorption assembly 23 can adopt an electromagnet assembly.

[0126] Optionally, the distance between the first adsorption assembly 22 and the second adsorption assembly 23 is configured to be adjustable. For example, at least one of the first adsorption assembly 22 and the second adsorption assembly 23 is arranged on the first mounting bracket 21 with its position finely adjustable through a waist-shaped hole. For example, the first adsorption assembly 22 and the second adsorption assembly 23 are arranged side by side on the first mounting bracket 21 in the first direction. The first adsorption assembly 22 is provided with a waist-shaped hole extending in the first direction, and the first mounting bracket 21 is provided with a screw hole corresponding to the waist-shaped hole. The first adsorption assembly 22 is fixedly connected to the first mounting bracket 21 through a bolt passing through the waist-shaped hole and the screw hole. When it is necessary to adjust the distance between the first adsorption assembly 22 and the second adsorption assembly 23, first loosen the bolt, then push the first adsorption assembly 22 to slide towards or away from the second adsorption assembly 23. After the first adsorption assembly 22 is adjusted in place, tighten the bolt again.

[0127] Since the distance between the first adsorption assembly 22 and the second adsorption assembly 23 can be finely adjusted, in actual production, the distance between the first adsorption assembly 22 and the second adsorption assembly 23 can be adaptively adjusted according to the actual size of the battery cell 100, so as to ensure that when the first adsorption assembly 22 places the sucked battery cell at the battery cell placement position A, the second adsorption assembly 23 can synchronously place the sucked press tool 300 on the solder strip group 400 located at the solder strip placement position C.

[0128] Such as Figure 3As shown, optionally, the battery stringing device in the embodiments of the present application further includes a solder tape supply device 5 disposed on the front side of the input end of the series connection conveyor line 1. The solder tape supply device 5 is configured to cut a plurality of solder tapes released from a solder tape reel to obtain a solder tape group 400 with a predetermined length. The solder tape laying device 3 is configured to obtain the solder tape group 400 from the solder tape supply device 5 and place the solder tape group 400 on the battery cell 100 at the solder tape placement position C.

[0129] By arranging the solder tape supply device 5 on the front side of the input end of the series connection conveyor line 1, the automatic preparation and supply of the solder tape group are realized, and the solder tape laying device 3 can obtain the solder tape group 400 required for stringing nearby, thereby improving the stringing efficiency.

[0130] Optionally, the solder tape supply device 5 includes an unwinding part, a pressing part and a cutting part arranged in sequence along the conveying direction of the series connection conveyor line 1. Among them, the unwinding part is used to install the solder tape reel and drive the solder tape reel to rotate to release a plurality of solder tapes. The free end of the solder tape passes through the pressing part and then enters the cutting part. The pressing part presses the solder tape so that the free end of the solder tape remains in the cutting part. The solder tape laying device 3 first clamps the free end of the solder tape from the cutting part, and the pressing part immediately releases the solder tape. Then, the solder tape laying device 3 pulls the solder tape towards the solder tape placement position C. When the solder tape of the predetermined length passes through the cutting part, the pressing part presses the solder tape again, and the cutting part cuts the solder tape, and the solder tape laying device 3 obtains a solder tape group 400. Since the solder tape supply device 5 is an existing device, its specific structure will not be described in detail here.

[0131] As Figure 3 shown, optionally, the battery stringing device in the embodiments of the present application further includes a cartridge conveying device 6, a chip picking device 7 and a loading conveyor line 8, where: the cartridge conveying device 6 is configured to convey a cartridge filled with battery cells 100 to the chip picking position. The chip picking device 7 is configured to pick up the battery cell 100 from the cartridge located at the chip picking position and place the battery cell 100 with the first surface facing down on the loading conveyor line 8. The loading conveyor line 8 is configured to convey the battery cell 100 to the side of the battery cell placement position A, and the handling device 2 is configured to pick up the battery cell 100 from the loading conveyor line 8.

[0132] It can be seen that through the cooperation of the cartridge conveying device 6, the chip picking device 7 and the loading conveyor line 8, the present application realizes the automatic loading of the battery cells 100, so that the handling device 2 can obtain the battery cells 100 required for stringing nearby, thereby improving the stringing efficiency.

[0133] As Figure 3As shown, optionally, the cassette conveying device 6 includes a first conveying line 61, a second conveying line 62, and a transfer conveying line 64, where: The first conveying line 61 is disposed above the second conveying line 62, and the conveying directions of the first conveying line 61 and the second conveying line 62 are opposite. For example, the first conveying line 61 conveys towards the sheet taking device 7, and the second conveying line 62 conveys away from the sheet taking device 7.

[0134] The transfer conveying line 63 is configured to lift between the output end of the first conveying line 61 and the input end of the second conveying line 62, and can alternately dock with the output end of the first conveying line 61 or the input end of the second conveying line 62. The first conveying line 61 is configured to convey the cassette filled with battery cells 100 to the sheet taking position, and convey the emptied cassette to the transfer conveying line 63 docked with the output end of the first conveying line 61. The transfer conveying line 63 is configured to convey the emptied cassette to the second conveying line 62 when docked with the input end of the second conveying line 62. The second conveying line 62 is used to output the emptied cassette.

[0135] The optional working process of the cassette conveying device 6 is as follows:

[0136] The first conveying line 61 conveys the cassette filled with battery cells 100 to the sheet taking position.

[0137] After the battery cells 100 in the cassette at the sheet taking position are emptied by the sheet taking device 7, the transfer conveying line 63 rises to the high position and docks with the output end of the first conveying line 61. The first conveying line 61 conveys the emptied cassette to the transfer conveying line 63. At this time, the sheet taking position is vacated, and the first conveying line 61 can convey a new cassette filled with battery cells 100 to the sheet taking position, enabling the sheet taking device 7 to continuously obtain battery cells 100 from the sheet taking position.

[0138] The transfer conveying line 63 descends to the low position and docks with the input end of the second conveying line 62. The transfer conveying line 63 conveys the emptied cassette to the second conveying line 62.

[0139] The second conveying line 62 outputs the emptied cassette.

[0140] It can be seen that through the cooperation of the first conveying line 61, the second conveying line 62, and the transfer conveying line 63, the cassette conveying device 6 can timely and continuously convey the cassette filled with battery cells 100 to the sheet taking position, preventing the shortage of battery cells.

[0141] Such as Figure 3 And Figure 6As shown, optionally, the wafer picking device 7 includes a second driving mechanism 71, a second mounting bracket 72, and at least one third suction component 73, where: The second mounting bracket 72 is connected to the driving end of the second driving mechanism 71. The third suction component 73 is arranged on the second mounting bracket 72. The second driving mechanism 71 is configured to drive the second mounting bracket 72 to translate and lift, so as to drive each third suction component 73 to pick up the battery wafers 100 from the cassette, and place the picked-up battery wafers 100 onto the loading conveyor line 8.

[0142] Figure 3 In this case, the cassette on the first conveyor line 61 includes three accommodating cavities, and the three accommodating cavities are arranged in sequence along the conveying direction of the first conveyor line 61. Each accommodating cavity is used to stack the battery wafers 100. Correspondingly, Figure 6 In the illustrated embodiment, the third suction components 73 are arranged in 3 in parallel. In this way, each of the 3 third suction components 73 in the wafer picking device 7 can pick up one battery wafer 100 from the three accommodating cavities of the cassette each time. That is, the wafer picking device 7 can pick up 3 battery wafers 100 at a single time, and simultaneously load the 3 picked-up battery wafers 100 onto the loading conveyor line 8, improving the loading efficiency of the battery wafers 100. Of course, the number of accommodating cavities of the cassette can also be set to 1, 2, 4, or other values. Correspondingly, the number of the third suction components 73 can also be set to 1, 2, 4, or other values. The number of the third suction components 73 and the number of accommodating cavities of the cassette need to be kept consistent to ensure that all the third suction components 73 can pick up the battery wafers 100 in all the accommodating cavities at the same time.

[0143] Since the solder tape is pre-set on the downward-facing first surface of the battery wafer 100, under the pulling of the solder tape, the middle part of the second surface of the battery wafer 100 is prone to arch upwards, reducing the flatness of the battery wafer 100. To solve this problem, optionally, as Figure 6 shown, the third suction component 73 includes a suction component 731 and a pressing unit 732. Among them, both the suction component 731 and the pressing unit 732 are connected to the second mounting bracket 72. The suction component 731 is configured to adsorb the battery wafer 100. When the suction component 731 places the battery wafer 100 onto the loading conveyor line 8, the pressing unit 732 is configured to press down the middle part of the battery wafer 100 to flatten the battery wafer 100, thereby improving the flatness of the battery wafer 100.

[0144] As Figure 6As shown in the figure, the adsorption assembly 731 includes two groups of suction cups. The two groups of suction cups are located on both sides of the pressing unit 732. After the two groups of suction cups adsorb the battery cell 100, the pressing unit 732 is located above the middle area of the battery cell 100. With this setting, it can be ensured that when the adsorption assembly 731 places the battery cell 100 on the loading conveyor 8, the pressing unit 732 can press down the middle part of the battery cell 100. Of course, the adsorption assembly 731 can also be composed of several suction cups surrounding the periphery of the pressing unit 732. In this way, it can also be ensured that when the adsorption assembly 731 places the battery cell 100 on the loading conveyor 8, the pressing unit 732 can press down the middle part of the battery cell 100.

[0145] Optionally, the pressing unit 732 includes a cylinder 7321 and a pressing plate 7322. The cylinder 7321 is arranged on the second mounting bracket 72, and the pressing plate 7322 is connected to the lower end of the telescopic rod of the cylinder 7321.

[0146] When the adsorption assembly 731 adsorbs the battery cell 100, the telescopic rod of the cylinder 7321 retracts upward, and the bottom surface of the pressing plate 7322 is higher than the bottom surface of the adsorption assembly 731 to avoid the battery cell 100.

[0147] After the adsorption assembly 731 places the battery cell 100 on the loading conveyor 8, the telescopic rod of the cylinder 7321 extends downward, so that the pressing plate 7322 presses against the battery cell 100 to press down the arched part in the middle of the battery cell 100, making the whole battery cell 100 flat.

[0148] Figure 3 and Figure 6 In the illustrated embodiment, the second driving mechanism 71 is composed of a translation module and a lifting module. Among them, the lifting module is connected to the moving part of the translation module, and the second mounting bracket 72 is connected to the moving part of the lifting module. The translation module is used to drive the second mounting bracket 72 to translate, and the lifting module is used to drive the second mounting bracket 72 to lift. The translation module and the lifting module can both adopt various existing linear driving modules, such as pulley driving modules, lead screw driving modules, etc.

[0149] The second driving mechanism 71 can also adopt a robotic arm. The second mounting bracket 72 is connected to the end of the robotic arm, and the robotic arm drives the second mounting bracket 72 to translate and lift.

[0150] Such as Figure 3As shown, optionally, the battery stringing device in the embodiments of the present application further includes a fixture conveying line 9 and a fixture removing device 10, where: the fixture conveying line 9 is configured to convey the fixture 300 to the side of the solder tape placement position C, and the handling device 2 is configured to pick up the fixture 300 from the fixture conveying line 9. The fixture removing device 10 is arranged downstream of the stringing device 4, and the fixture removing device 10 is configured to place the fixture 300 on the solder tape group 400 back onto the fixture conveying line 9 after the solder tape group 400 is fixed to the corresponding battery cell 100.

[0151] By providing the fixture conveying line 9, the fixture 300 is automatically conveyed to the side of the solder tape placement position C, enabling the handling device 2 to pick up the fixture nearby. By providing the fixture removing device 10, after the solder tape group 400 is fixed to the corresponding battery cell 100, the fixture 300 can be automatically placed back onto the fixture conveying line 9, and the fixture conveying line 9 conveys the recycled fixture 300 back to the side of the solder tape placement position C to achieve the recycling of the fixture 300.

[0152] As Figure 7 shown, optionally, the fixture removing device 10 includes a fifth driving mechanism 1001 and a fourth suction component 1002. The fourth suction component 1002 is connected to the moving part of the fifth driving mechanism 1001, and the fifth driving mechanism 1001 drives the fourth suction component 1002 to translate and lift, so as to drive the fourth suction component 1002 to pick up and handle the fixture 300.

[0153] The fifth driving mechanism 1001 can adopt various existing driving devices capable of driving the fourth suction component 1002 to translate and lift. For example, the fifth driving mechanism 1001 includes a second translation driving part and a second lifting driving part. The second lifting driving part is connected to the driving end of the second translation driving part, and the fourth suction component 1002 is connected to the driving end of the second lifting driving part. The second translation driving part is used to drive the fourth suction component 1002 to translate, and the second lifting driving part is used to drive the fourth suction component 1002 to lift. The second translation driving part and the second lifting driving part can both adopt various existing types of linear driving modules, such as cylinders, linear motor modules, ball screw modules, etc.

[0154] The fifth driving mechanism 1001 can also be a robotic arm, and the fourth suction component 1002 is connected to the end of the robotic arm, and the robotic arm drives the fourth suction component 1002 to translate and lift. The fourth suction component 1002 can be, for example, an electromagnet component.

[0155] As Figure 1 and Figures 8 to 10 shown, optionally, the battery stringing device in the embodiments of the present application further includes a first solder tape guiding device 110 located at the solder tape placement position C.

[0156] The first solder tape guide device 110 includes at least a first guide plate 111, which is located above the junction of the buffer position B and the solder tape placement position C. There is a first gap between the first guide plate 111 and the conveying surface of the serial conveyor line 1 for the battery cell 100 to pass through. When the solder tape device 3 pulls the solder tape group 400 toward the solder tape placement position C, the first guide plate 111 is configured to guide the solder tape group 400. Specifically, a plurality of first guide grooves 1111 are provided on the first guide plate 111, and each first guide groove 1111 is used to accommodate and guide a solder tape in the solder tape group 400.

[0157] It can be seen that, through the guidance of the first guide plate 111, it can be ensured that the welding tape device 3 can accurately pull the welding tape group 400 and lay it to the target position on the battery cell 100 located at the welding tape placement position C, thereby preventing the welding tape group 400 from being shifted during traction and laying, thereby affecting the quality of the battery string.

[0158] When the welding tape device 3 pulls the welding tape group 400 onto the battery cell 100 at the welding tape placement position C, the head end of the welding tape group 400 is still clamped by the welding tape device 3, that is, the head end of the welding tape group 400 is tilted upward. Conventional pressing tools have pressure pins of equal length, so conventional pressing tools are used to press the welding tape group 400. Since the head end of the welding tape group 400 is at a high position and is still clamped by the welding tape device 3, when the pressing tool 300 presses the welding tape group 400 and the welding tape device 3 releases the head end of the welding tape group 400, the head end of the welding tape group 400 will be deformed by pressure and become tilted, affecting the subsequent series connection.

[0159] The applicant of the present application disclosed a welding strip clamping tool (i.e., a press for clamping welding strip groups) in the Chinese utility model patent with publication number CN202320560561.1, which is achieved by setting the elastic pressing pins at both ends of the press as shorter first-type pressing pins, and the elastic pressing pins in the middle as longer second-type pressing pins. When the welding strip group is pulled and laid on the battery cell by the welding strip traction mechanism (equivalent to the cloth welding strip device 3 in the present application), the end plates at both ends of the press are lifted, so that the second-type pressing pins first press the non-head end of the welding strip group. When the welding strip traction mechanism releases the welding strip group, the press is controlled to fall completely, and the first-type pressing pin presses the head end of the welding strip group, so as to prevent the head end of the welding strip group from being bent or warped.

[0160] The present application uses the pressing tool to implement the pressing of the welding ribbon group 400. Specifically, Figure 14 As shown, the pressing tool 300 includes first-type pressing pins 301 at both ends and second-type pressing pins 302 in the middle, wherein, in a non-pressed state, the bottom surface of the first-type pressing pins 301 is higher than the bottom surface of the second-type pressing pins 302. In other words, in a non-pressed state, the first-type pressing pins 301 are shorter than the second-type pressing pins 302.

[0161] Optionally, the first guiding plate 111 of the first solder tape guiding device 110 is configured to be movable parallel to the conveying path of the series connection conveying line 1, so as to realize the switching movement between the guiding position close to the solder tape placement position C and the avoidance position far from the solder tape placement position C. As Figures 8 to 10 shown, the first solder tape guiding device 110 further includes a first support plate 112 and a second support plate 113 located on both sides of the solder tape placement position C. The first support plate 112 and the second support plate 113 are configured to be able to synchronously lift and switch between the support position and the release position, wherein the support position is higher than the release position.

[0162] After the solder tape laying device 3 pulls the solder tape group 400 to the battery cell 100 located at the solder tape placement position C, the tail end of the solder tape group 400 is supported on the first guiding plate 111 located at the guiding position. When the first support plate 112 and the second support plate 113 rise to the support position, they respectively support the two side end plates of the pressing tool 300 placed on the solder tape group 400 by the handling device 2, so that the first type of pressing needles 310 at both ends of the pressing tool 300 do not contact the head end and the tail end of the solder tape group 400, and the second type of pressing needles 302 in the middle of the pressing tool 300 press the solder tape group 400 tightly to the battery cell 100.

[0163] When the solder tape laying device 3 releases the head end of the solder tape group 400, the first guiding plate 111 is configured to move to the avoidance position to release the tail end of the solder tape group 400, and the first support plate 112 and the second support plate 113 are configured to synchronously descend to the release position, so that the first type of pressing needles 301 at both ends of the pressing tool 300 press the tail end and the head end of the solder tape group 400 tightly to the battery cell 100 respectively.

[0164] It can be seen that when the welding ribbon group 400 is pulled onto the battery cell 100 located at the welding ribbon placement position C, the tail end of the welding ribbon group 400 is supported on the first guide plate 111 located at the guide position, and the head end remains clamped by the welding ribbon device 3. When the handling device 2 places the press 300 on the welding ribbon group 400, the first support plate 112 and the second support plate 113 located at the support position support and raise the end plates on both sides of the press 300, so that the first type of pressing needles 301 at both ends of the press 300 do not contact the head and tail ends of the welding ribbon group 400, and the second type of pressing needles 302 in the middle of the press 300 press the non-end part of the welding ribbon group 200 onto the battery cell 100. When the cloth welding tape device 3 releases the head end of the welding tape group 400 and the first guide plate 111 releases the tail end of the welding tape group 400, the first support plate 112 and the second support plate 113 are simultaneously lowered to the release position, so that the first type of pressure needles 301 at both ends of the press 300 press the head end and the tail end of the welding tape group 400 downward respectively. In this way, the upturned two ends of the welding tape group 400 can be prevented from being bent by the press 300, resulting in upturning, and it is ensured that both ends of the welding tape group 400 can be accurately stacked at the target position of the battery cell 100.

[0165] Optionally, the first welding ribbon guiding device 110 further includes a first supporting arm 114, a second supporting arm 115, a first lifting assembly 116, a second lifting assembly 117, a first elastic pressing assembly 118, a second elastic pressing assembly 119 and a third driving mechanism 1120, wherein:

[0166] The first support arm 114 and the second support arm 115 are relatively arranged on both sides of the serial conveyor line 1, and are both connected to the third driving mechanism 1120 in transmission. The two ends of the first guide plate 111 are respectively connected to the first support arm 114 and the second support arm 115. The first support arm 114 and the second support arm 115 are respectively provided with a first support surface a and a second support surface b in the direction away from the first guide plate 111, wherein the first support surface a is higher than the second support surface b.

[0167] The third driving mechanism 1120 is configured to drive the first support arm 114 and the second support arm 115 to move parallel to the conveying path of the serial conveyor line 1, so as to drive the first guide plate 111 to move and switch between the guide position and the avoidance position. Optionally, in order to implement the translational guidance of the first support arm 114 and the second support arm 115, guide rails parallel to the conveying path of the serial conveyor line 1 are provided on both sides of the serial conveyor line 1, and the first support arm 114 and the second support arm 115 are slidably mounted on the guide rails on the corresponding sides.

[0168] The first lifting assembly 116 is connected to the first side wall of the serial conveyor line 1 in a lifting and sliding manner, the second lifting assembly 117 is connected to the second side wall of the serial conveyor line 1 in a lifting and sliding manner, the first support plate 112 is connected to the first lifting assembly 116, and the second support plate 113 is connected to the second lifting assembly 117.

[0169] The first elastic pressing assembly 118 is connected to the first side wall of the serial conveying line 1 , and the second elastic pressing assembly 119 is connected to the second side wall of the serial conveying line 1 .

[0170] When the first guide plate 111 moves to the guiding position, the first elastic clamping assembly 118 is configured to elastically press the first lifting assembly 116 onto the first supporting surface a of the first supporting arm 114, and the second elastic clamping assembly 119 is configured to elastically press the second lifting assembly 117 onto the first supporting surface a of the second supporting arm 115, and the first support plate 112 and the second support plate 113 are located in the supporting position.

[0171] When the first guide plate 111 moves to the avoidance position, the first elastic clamping assembly 118 is configured to elastically press the first lifting assembly 116 onto the second support surface b of the first support arm 114, and the second elastic clamping assembly 119 is configured to elastically press the second lifting assembly 117 onto the second support surface b of the second support arm 115, and the first support plate 112 and the second support plate 113 are in the release position.

[0172] It can be seen that by setting the first welding ribbon guiding device 110, the linkage of the first supporting plate 112, the second supporting plate 113 and the first guiding plate 111 is realized. Specifically:

[0173] When the third driving mechanism 1120 drives the first guide plate 111 to the guide position via the first support arm 114 and the second support arm 115, the first lifting assembly 116 and the second lifting assembly 117 move to the first support surface a of the first support arm 114 and the second support arm 115, thereby being lifted up, so that the first support plate 112 and the second support plate 113 rise to the support position. At the same time, the first elastic pressing assembly 118 and the second elastic pressing assembly 119 are compressed to produce vertical contraction.

[0174] When the third driving mechanism 1120 drives the first guide plate to the avoidance position via the first support arm 114 and the second support arm 115, the first lifting assembly 116 and the second lifting assembly 117 move to the second support surface b of the first support arm 114 and the second support arm 115. At the same time, the first elastic clamping assembly 118 and the second elastic clamping assembly 119 push the first lifting assembly 116 and the second lifting assembly 117 downward after losing pressure, thereby causing the first support plate and the second support plate to drop to the release position.

[0175] The above-mentioned setting mode, on the one hand, realizes that only one driving mechanism is required to implement synchronous driving of the first guide plate 111, the first support plate 112, and the second support plate 113, thereby reducing the driving cost. On the other hand, it ensures that the first guide plate 111 is synchronously moved with the first support plate 112 and the second support plate 113. When the first guide plate 111 switches to the guiding position, the first support plate 112 and the second support plate 113 switch to the supporting position. When the first guide plate 111 switches to the avoiding position, the first support plate 112 and the second support plate 113 switch to the releasing position.

[0176] Of course, in other embodiments, the first guide plate 111, the first support plate 112 and the second support plate 113 can also be driven independently by different driving mechanisms. For example, the first guide plate 111 is connected to a translation drive device, and the first support plate 112 and the second support plate 113 are connected to a lifting drive device. When the translation drive device drives the first guide plate 111 to translate to the guide position, the lifting drive device drives the first support plate 112 and the second support plate 113 to rise to the support position. When the translation drive device drives the first guide plate 111 to translate to the avoidance position, the lifting drive device drives the first support plate 112 and the second support plate 113 to descend to the release position. The translation drive device can adopt an existing horizontal cylinder, a linear module, etc. The lifting drive device can adopt an existing vertical cylinder, a linear module, etc.

[0177] Optionally, the second lifting assembly 117 has the same structure as the first lifting assembly 116, and the second elastic clamping assembly 119 has the same structure as the first elastic clamping assembly 118. Taking the first lifting assembly 116 and the first elastic clamping assembly 118 as an example, Figures 8 to 9 As shown, the first lifting assembly 116 includes a slider 1161 and a roller 1162, wherein the slider 1161 is connected to the first side wall of the serial conveyor line 1 in a lifting and sliding manner via a vertical slide rail, the roller 1162 is arranged on the slider 1161 and supported on the first support arm 114, and the first support plate 112 is connected to the top of the slider 1161. The first elastic clamping assembly 118 includes a pressure block and a spring, wherein the pressure block is fixed on the first side wall of the serial conveyor line 1 and is located above the roller 1162, the upper end of the spring abuts on the pressure block, and the lower end of the spring abuts on the slider 1161.

[0178] When the first guide plate 111 moves from the avoidance position to the guide position under the drive of the third driving mechanism 1120, the roller 1162 slides from the second support surface b of the first support arm 114 to the first support surface a of the first support arm 114, thereby driving the slider 1161 to slide upward, so that the first support plate 112 rises to the supporting position and the spring is compressed.

[0179] When the first guide plate 111 moves from the guiding position to the avoiding position, the roller 1162 slides from the first supporting surface a of the first supporting arm 114 to the second supporting surface b of the first supporting arm 114. The spring decompresses and rebounds, pushing the slider 1161 to slide downward, so that the first supporting plate 112 descends to the releasing position. To ensure the smooth movement of the roller 1162 between the first supporting surface a and the second supporting surface b, the first supporting surface a and the second supporting surface b are in smooth transition.

[0180] The first lifting assembly 116 and the second lifting assembly 117 are arranged as a lifting structure composed of the slider 1161 and the roller 1162, so that the first lifting assembly 116 and the second lifting assembly 117 can slide up and down smoothly relative to the series-connected conveyor line 1, and slide horizontally smoothly along the supporting surfaces of the first supporting arm 114 and the second supporting arm 115, avoiding jamming and affecting the supporting stability of the first supporting plate 112 and the second supporting plate 113.

[0181] For the convenience of disassembly and assembly of the slider 1161 and the side wall of the series-connected conveyor line 1. As Figure 8 shown, optionally, the slider 1161 is fixed to the side wall of the series-connected conveyor line 1 through the mounting block 1130. For example, the mounting block 1130 is provided with a vertical guide rail, and the slider 1161 is slidably connected to the mounting block 1130 through the vertical guide rail. The mounting block 1130 is provided with a connection hole, and the mounting block 1130 is fixedly connected to the side wall of the series-connected conveyor line 1 through the connection hole thereon. Of course, the slider 1161 can also be directly slidably connected to the side wall of the series-connected conveyor line 1 through a vertical slide rail.

[0182] As Figures 8 to 9 shown, optionally, the third driving mechanism 1120 includes a first translation driving module 1121 and a first connecting plate 1122, wherein: the first connecting plate 1122 is connected to the driving end of the first translation driving module 1121 and is located below the conveying surface of the series-connected conveyor line 1, and both ends of the first connecting plate 1122 are connected to the first supporting arm 114 and the second supporting arm 115 respectively.

[0183] With such a setting, on the premise of ensuring that the third driving mechanism 1120 can implement synchronous translation driving of the first supporting arm 114 and the second supporting arm 115, the avoidance of the series-connected conveyor line 1 is realized, so that the third driving mechanism 1120 and the series-connected conveyor line 1 do not interfere with each other.

[0184] The first translation driving module 1121 can adopt various existing linear driving modules capable of driving the first connecting plate 1122 to translate, such as a cylinder, or a lead screw driving module composed of a servo motor, a lead screw and a lead screw nut, etc.

[0185] As Figure 1 and Figures 11 to 12As shown, optionally, the battery stringing device in the embodiment of the present application further includes a second welding tape guide device 120, and the second welding tape guide device 120 includes a second guide plate 121 and a fourth drive mechanism 122, wherein: the second guide plate 121 is located above the serial conveyor line 1 and in front of the first guide plate 11, and there is a second gap between the second guide plate 121 and the conveying surface of the serial conveyor line 1 for the battery sheet 100 to pass through. The second guide plate 121 is transmission-connected to the fourth drive mechanism 122, and the fourth drive mechanism 122 is configured to drive the second guide plate 121 to move parallel to the conveying path of the serial conveyor line 1, so that the second guide plate 121 moves and switches between a first intersection position away from the first guide plate 111 and a second intersection position close to the first guide plate 111.

[0186] When the second guide plate 121 moves to the first handover position, the welding tape group 400 pulled by the cloth welding tape device 3 falls onto the second guide plate 121. When the second guide plate 121 moves to the second handover position, the welding tape group 400 transitions to the first guide plate 111 under the traction of the cloth welding tape device 3. In particular, a plurality of second guide grooves 1211 are provided on the second guide plate 121, and each second guide groove 1211 is used to accommodate one welding tape in the welding tape group 400.

[0187] The following will be combined Figure 15 , an exemplary description is given of the cooperation and guiding process of the second welding tape guiding device 120 and the first welding tape guiding device 110 in the embodiment of the present invention.

[0188] like Figure 15 As shown in (a), the second guide plate 121 is located at the second intersection position, and the first guide plate 11 is located at the guide position. The first battery cell 100 is laid at the battery cell placement position A with the first surface facing downward.

[0189] like Figure 15 As shown in (b), the serial conveyor line 1 is controlled to step forward once, so that the first battery cell 100 steps forward to the buffer position B, leaving the battery cell placement position A. Then, the second battery cell 100 is placed at the battery cell placement position A with the first surface facing downward.

[0190] like Figure 15 As shown in (c) in FIG. 1 , the second guide plate 121 moves to the first handover position, ready to receive the first welding tape group pulled by the cloth welding tape device 3 .

[0191] like Figure 15As shown in (d) therein, the control series connection conveyor line 1 is stepped forward once, so that the second battery cell 100 steps forward to the buffer position B, the first battery cell 100 steps forward to the solder tape placement position C, and the battery cell placement position A is vacated. The solder tape laying device 3 pulls the first solder tape group to the first battery cell 100 located at the solder tape placement position C. During the pulling process, the second guide plate 121 moves synchronously with the solder tape laying device 3 to the second handover position, and the first solder tape group transitions from the second guide plate 121 to the first guide plate 111. After the first solder tape group is pulled in place, the tail end of the first solder tape group is finally supported on the first guide plate 111.

[0192] As Figure 15 shown in (e) therein, the handling device 2 places the first pressing tool to the solder tape placement position C, and places the third battery cell 100 with the first surface facing down to the battery cell placement position A. The second type of pressing pins of the first pressing tool press the first solder tape group onto the first battery cell 100. Subsequently, the first guide plate 11 moves to the avoidance position, and the solder tape laying device 3 releases the head end of the first solder tape group, and the first type of pressing pins of the pressing tool press the tail end and the head end of the first solder tape group.

[0193] As Figure 15 shown in (f) therein, the control series connection conveyor line 1 is stepped forward once, so that the third battery cell 100 steps forward to the buffer position B, the second battery cell 100 steps forward to the solder tape placement position C, and the battery cell placement position A is vacated. At the same time, the second guide plate 121 moves to the first handover position to prepare to receive the second solder tape group pulled by the solder tape laying device 3.

[0194] Repeat the laying process as Figure 15 shown in (d) therein to Figure 15 shown in (f) therein until the battery stringing is completed.

[0195] It can be seen that by setting the second guide plate 121 driven by the fourth driving mechanism 122, when the solder tape laying device 3 pulls the solder tape group towards the first guide plate 111, the second guide plate 121 can move synchronously with the solder tape laying device 3 towards the first guide plate 111 to support the solder tape group from below, so as to realize the guiding and positioning of the solder tape group, and finally ensure that each solder tape in the solder tape group can accurately enter the corresponding first guide groove 1111 on the first guide plate 111.

[0196] Optionally, the second welding strip guiding device 120 further includes a third support arm 123 and a fourth support arm 124, wherein: the third support arm 123 and the fourth support arm 124 are relatively arranged on both sides of the serial conveyor line 1, and are both connected to the fourth driving mechanism 122 in transmission connection, and the two ends of the second guide plate 121 are respectively connected to the third support arm 123 and the fourth support arm 124. The fourth driving mechanism 122 is configured to drive the third support arm 123 and the fourth support arm 124 to move parallel to the conveying path of the serial conveyor line, so as to drive the second guide plate 121 to move and switch between the first handover position and the second handover position. Optionally, in order to implement the translational guidance of the third support arm 123 and the fourth support arm 124, guide rails parallel to the conveying path of the serial conveyor line 1 are arranged on both sides of the serial conveyor line 1, and the third support arm 123 and the fourth support arm 124 are slidably mounted on the guide rails on the corresponding sides.

[0197] The two ends of the second guide plate 121 are respectively connected to the third support arm 123 and the fourth support arm 124, and the fourth driving mechanism 122 drives the third support arm 123 and the fourth support arm 124 to move parallel to the conveying path of the serial conveyor line 1, thereby driving the second guide plate 121 to move and switch between the first intersection position and the second intersection position, so that the second guide plate 121 maintains a stable horizontal state, ensuring the guiding effect of the second guide plate 121 on the welding strip group.

[0198] like Figure 11 As shown, optionally, the fourth driving mechanism 122 includes a second translation driving module 1221 and a second connecting plate 1222, wherein: the second connecting plate 1222 is connected to the driving end of the second translation driving module 1221 and is located at the lower side of the conveying surface of the serial conveying line 1. The two ends of the second connecting plate 1222 are respectively connected to the third support arm 123 and the fourth support arm 124.

[0199] Such arrangement, under the premise of ensuring that the fourth driving mechanism 122 can implement synchronous translational driving of the third support arm 123 and the fourth support arm 124, avoidance of the serial conveyor line 1 is achieved, so that the fourth driving mechanism 122 and the serial conveyor line 1 do not interfere with each other.

[0200] The second translation driving module 1221 can adopt various existing linear driving modules capable of driving the second connecting plate 1222 to translate, such as a cylinder, or a screw driving module composed of a servo motor, a screw and a screw nut.

[0201] like Figure 13As shown, optionally, the cloth welding tape device 3 includes a third translation drive unit 31, a third lifting drive unit 32 and a clamping unit 33, wherein the third lifting drive unit 32 is connected to the driving end of the third translation drive unit 31, and the clamping unit 33 is connected to the driving end of the third lifting drive unit 32, and the third translation drive unit 31 and the third lifting drive unit 32 are respectively used to drive the clamping unit 33 to translate and lift, thereby driving the clamping unit 33 to clamp the welding tape group from the welding tape supply device 5, and to pull the welding tape group toward the welding tape placement position C.

[0202] The third translation driving unit 31 is, for example, a synchronous belt module composed of a motor, a synchronous belt and a slider, and the third lifting driving unit 32 is, for example, a ball screw module, a linear motor module, and the like.

[0203] In order to improve the efficiency of traction and laying of the welding tape group, optionally, the cloth welding tape device 3 is set to two groups, and the two groups of cloth welding tape devices 3 alternately clamp the welding tape group from the welding tape supply device 5, and alternately pull the welding tape group toward the welding tape placement position C. When one group of cloth welding tape devices 3 pulls the welding tape group to the welding tape placement position C, the first guide plate 111 supports and guides the welding tape group at the welding tape placement position C. The other group of cloth welding tape devices 3 will pull the next group of welding tape groups from the welding tape supply device 5, and the second guide plate 121 can cooperate with the other group of cloth welding tape devices 3 to guide the movement of the next group of welding tape groups.

[0204] Optionally, the serial connection device 4 may adopt various existing devices capable of fixing the welding ribbon group 400 to the battery cell 100. For example, the serial connection device 4 is a heating light box, which can heat the welding ribbon group 400 so that the solder on the surface of the welding ribbon group 400 melts and then is welded to the corresponding battery cell 100. A glue application device may also be provided between the welding ribbon placement position C and the serial connection device 4, and the glue application device is used to apply a thermosetting glue to the welding ribbon group 400. When the welding ribbon group 400 reaches below the heating light box, the heating light box radiates heat to the welding ribbon group 400, thereby curing the thermosetting glue on the welding ribbon group 400 and bonding the welding ribbon group 400 to the battery cell 100.

[0205] Based on the same inventive concept, the present application also provides a battery series connection method, which is used to Figure 2 As shown in the figure, N battery cells 100 with a group of welding strips on the first surface are connected in series to form a battery string. All welding strips 101 on the first surface of the battery cell 100 extend outward and are interconnected through a connecting strip 102.

[0206] The battery series connection method of the present application comprises the following steps:

[0207] After the first battery cell is placed with the first surface facing downward at the battery cell placement position, the first battery cell is stepped forward to the cache position to vacate the battery cell placement position.

[0208] After placing the first surface of the second cell downward at the cell placement position, step the first and second cells simultaneously, so that the second cell steps forward to the buffer position, the first cell steps forward to the solder tape placement position, and the cell placement position is vacated;

[0209] Set the initial value of i to 1, and determine whether i is greater than N - 2. If i is not greater than N - 2, then pull the i-th solder tape group to the i-th cell located at the solder tape placement position, and make the tail end of the i-th solder tape group rest on the connection bar on the (i + 1)-th cell located at the buffer position;

[0210] Place the i-th press tool on the i-th solder tape group, and place the first surface of the (i + 2)-th cell downward at the cell placement position;

[0211] Step all the cells simultaneously, so that the (i + 2)-th cell steps forward to the buffer position, the (i + 1)-th cell steps forward to the solder tape placement position, and the cell placement position is vacated; increment i by 1, and execute the step of determining whether i is greater than N - 2;

[0212] If i is greater than N - 2, then pull the (N - 1)-th solder tape group to the (N - 1)-th cell located at the solder tape placement position, and make the tail end of the (N - 1)-th solder tape group rest on the connection bar on the N-th cell located at the buffer position;

[0213] Place the (N - 1)-th press tool on the (N - 1)-th solder tape group;

[0214] Step the N-th cell forward to the solder tape placement position, pull the N-th solder tape group to the N-th cell, and place the N-th press tool on the N-th solder tape group;

[0215] Wherein: the cell placement position, the buffer position, and the solder tape placement position are successively and continuously arranged along the first direction;

[0216] Fix each solder tape group to the corresponding cell.

[0217] In order to enable those skilled in the art to more clearly understand the implementation process of the battery string connection method of the present application, the following still combines Figure 4 , taking N = 4 as an example, to describe the implementation process of the battery string connection method in the embodiments of the present application in more detail.

[0218] The battery string to be manufactured in this embodiment is formed by connecting 4 cells through 4 solder tape groups. With reference to Figure 4 , the specific stringing process of this battery string is as follows:

[0219] Place the first surface of the first cell 100 downward at the cell placement position A.

[0220] Step the first cell 100 forward to the buffer position B, leaving the cell placement position A empty.

[0221] After placing the second cell 100 face - down on the cell placement position A, step the first and second cells 100 simultaneously, so that the second cell 100 steps forward to the buffer position B, and the first cell 100 steps forward to the solder tape placement position C, leaving the cell placement position A empty.

[0222] Set the initial value of i to 1, and determine whether i is greater than N - 2 (= 2). Since i is not greater than N - 2, the first solder tape group 400 is pulled to the first cell 100 at the solder tape placement position C, and the end of the first solder tape group 400 is placed on the connection bar 102 of the second cell 100 at the buffer position B.

[0223] Place the first press tool 300 on the first solder tape group 400, and place the third cell 100 face - down at the cell placement position A.

[0224] Step all the cells 100 simultaneously, so that the third cell steps forward to the buffer position B, the second cell steps forward to the solder tape placement position C, leaving the cell placement position A empty.

[0225] Increment i by 1. At this time, i = 2. Determine whether i is greater than N - 2 (= 2). Since i is not greater than N - 2, the second solder tape group 400 is pulled to the second cell at the solder tape placement position C, and the end of the second solder tape group 400 is placed on the connection bar 102 of the third cell 100 at the buffer position B.

[0226] Place the second press tool 300 on the second solder tape group 400, and place the fourth cell 100 face - down at the cell placement position A.

[0227] Step all the cells 100 simultaneously, so that the fourth cell steps forward to the buffer position B, the third cell 100 steps forward to the solder tape placement position C, leaving the cell placement position A empty.

[0228] Increment i by 1. At this time, i = 3. Determine whether i is greater than N - 2 (= 2). Since i is greater than 2, the third solder tape group is pulled to the third cell 100 at the solder tape placement position, and the end of the third solder tape group 400 is placed on the connection bar 102 of the fourth cell 100 at the buffer position B.

[0229] Place the third press tool 300 on the third solder tape group 400.

[0230] Step the 4th cell forward to the solder tape placement position C, pull the 4th solder tape group 400 onto the 4th cell, and place the 4th press tool 300 on the 4th solder tape group 400.

[0231] Thus, the stringing of the cells 100 and the solder tape groups 400 is completed.

[0232] Fix each solder tape group 400 to the corresponding cell 100 to obtain a battery string.

[0233] It can be seen that in the battery stringing method provided by this application, during the stringing process, the cells 100 are stepwise conveyed to the solder tape placement position C in sequence. Whenever a cell 100 reaches the solder tape placement position C, the solder tape group 400 is pulled onto the cell 100 at the solder tape placement position C, and the tail end of the solder tape group 400 is placed on the connection strip 102 of the cell 100 at the buffer position B until the laying and stringing of the cells 100 and the solder tape groups 400 are completed. In addition, during the laying and stringing process, the press tool 300 is placed on the solder tape group 400 to realize the pressing and positioning of the solder tape group 400.

[0234] The battery stringing method provided by this application realizes the automatic stringing of cells with solder tapes on the first surface, which improves the stringing efficiency of such cells and ensures the stringing quality.

[0235] Optionally, during the stringing process, while placing the i-th press tool 300 on the i-th solder tape group 400, place the i + 2-th cell 100 with its first surface facing down at the cell placement position A. In this way, the simultaneous laying of the press tool 300 and the cell 100 can be realized, thereby further improving the stringing efficiency of the cell 100.

[0236] The battery stringing method in the embodiments of this application can be implemented by the battery stringing device in any of the previous embodiments. For further implementation details, reference can be made to the relevant descriptions of the battery stringing devices in the previous embodiments, which will not be elaborated here.

[0237] This application has been described in sufficient detail with certain particularities. Those of ordinary skill in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection required by this application is defined by the claims described, rather than by the above descriptions in the embodiments. On the premise of no contradiction, some optional components in one embodiment can also be used in another embodiment, and some preferred structures of the same component in one embodiment are also applicable to another embodiment. In addition, there may be slight differences in the literal expressions of the names of certain components in different embodiments, and these slight differences will not affect the understanding of the technical solutions of this specification by those skilled in the art.

Claims

1. A battery stringing device, characterized in that, For connecting N solar cells with a set of welding tapes on their first surfaces into a solar cell string, all the welding tapes on the first surface of the solar cell extend outwards and are interconnected by a connecting bar. The solar cell stringing device includes a stringing conveyor line, a handling device, a welding tape arranging device and a stringing device, wherein: Continuous solar cell placement positions, buffer positions and welding tape placement positions are provided on the conveying path of the stringing conveyor line. The stringing conveyor line is configured to step-convey the solar cells with their first surfaces facing downwards, so that the solar cells located at the solar cell placement positions step to the buffer positions and the welding tape placement positions in sequence; When the i-th solar cell steps to the welding tape placement position, the welding tape arranging device is configured to pull the i-th welding tape group onto the i-th solar cell located at the welding tape placement position, and make the tail end of the i-th welding tape group overlap on the connecting bar of the (i + 1)-th solar cell located at the buffer position; the handling device is configured to place the i-th press tool onto the i-th welding tape group, and place the (i + 2)-th solar cell with its first surface facing downwards at the solar cell placement position. The press tool is used to press the welding tape group onto the corresponding solar cell; wherein, 1 ≤ i ≤ N - 2; The stringing device is arranged downstream of the welding tape placement position and is configured to fix the welding tape group to the corresponding solar cell.

2. The battery stringing device according to claim 1, wherein, The handling device includes a first driving mechanism, a first mounting bracket, a first suction component and a second suction component, wherein: The first mounting bracket is connected to the driving end of the first driving mechanism; The first suction component and the second suction component are arranged side by side and at intervals on the first mounting bracket; The first driving mechanism is at least configured to drive the first mounting bracket to translate and lift, so as to drive the first suction component to suck a solar cell and place the sucked solar cell with its first surface facing downwards at the solar cell placement position; and drive the second suction component to suck a press tool and place the sucked press tool onto the welding tape group located at the welding tape placement position, so as to press the welding tape group onto the corresponding solar cell; The distance between the first suction component and the second suction component is not less than the length of one solar cell in the conveying direction of the stringing conveyor line.

3. The battery stringing device according to claim 2, characterized in that, The distance between the first suction component and the second suction component is configured to be adjustable, and at least one of the first suction component and the second suction component is arranged on the first mounting bracket with its position adjustable through a waist-shaped hole.

4. The battery stringing device according to claim 1, wherein, The solar cell stringing device further includes a welding tape supply device arranged on the front side of the input end of the stringing conveyor line. The welding tape supply device is configured to cut several welding tapes released from a welding tape coil to obtain a welding tape group with a predetermined length; The welding tape arranging device is configured to obtain the welding tape group from the welding tape supply device and place the welding tape group onto the solar cell located at the welding tape placement position.

5. The battery stringing device according to claim 1, wherein The solar cell stringing device further includes a cartridge conveying device, a wafer picking device and a loading conveyor line, wherein: The cartridge conveying device is configured to convey a cartridge filled with solar cells to the wafer picking position; The wafer picking device is configured to pick up wafers from a cassette located at the wafer picking position and place the wafers face down on the loading conveyor line; The loading conveyor line is configured to convey the wafers to the side of the wafer placement position, and the handling device is configured to pick up the wafers from the loading conveyor line.

6. The battery stringing device according to claim 5, characterized in that, The cassette conveying device includes a first conveyor line, a second conveyor line, and a transfer conveyor line, where: The first conveyor line is arranged above the second conveyor line, and the conveying directions of the first conveyor line and the second conveyor line are opposite; The transfer conveyor line is configured to lift between the output end of the first conveyor line and the input end of the second conveyor line and dock with the output end of the first conveyor line or the input end of the second conveyor line; The first conveyor line is configured to convey a cassette full of wafers to the wafer picking position and convey the emptied cassette to the transfer conveyor line docked with the output end of the first conveyor line; The transfer conveyor line is configured to convey the emptied cassette to the second conveyor line when docking with the input end of the second conveyor line; The second conveyor line is used to output the emptied cassette.

7. The battery stringing device according to claim 5, wherein, The wafer picking device includes a second driving mechanism, a second mounting bracket, and at least one third suction component, where: The second mounting bracket is connected to the driving end of the second driving mechanism; The third suction component is arranged on the second mounting bracket; The second driving mechanism is configured to drive the second mounting bracket to translate and lift, so as to drive each third suction component to pick up wafers from the cassette and place the picked-up wafers on the loading conveyor line.

8. The battery stringing device according to claim 7, wherein, The third suction component includes an adsorption component and a pressing unit, where both the adsorption component and the pressing unit are connected to the second mounting bracket; The adsorption component is configured to adsorb the wafers. When the adsorption component places the wafers on the loading conveyor line, the pressing unit is configured to press down the middle of the wafers to flatten the wafers.

9. The battery stringing device according to claim 1, wherein The battery stringing device further includes a jig conveyor line and a jig removal device, where: The jig conveyor line is configured to convey the jigs to the side of the solder tape placement position, and the handling device is configured to pick up the jigs from the jig conveyor line; The jig removal device is arranged downstream of the stringing device and is configured to place the jigs on the solder tape group back on the jig conveyor line after the solder tape group is fixed to the corresponding wafers.

10. The battery stringing device according to claim 1, characterized in that, The battery stringing device further includes a first solder tape guiding device located at the solder tape placement position; The first solder tape guiding device at least includes a first guiding plate. The first guiding plate is located above the junction of the buffer position and the solder tape placement position, and there is a first gap for the wafers to pass through between the first guiding plate and the conveying surface of the stringing conveyor line; When the cloth welding tape device pulls the welding tape group toward the welding tape placement position, the first guide plate is configured to guide the welding tape group, and a plurality of first guide grooves are provided on the first guide plate, each of which is used to accommodate a welding tape in the welding tape group.

11. The battery stringing device according to claim 10, characterized in that: The first guide plate is configured to be movable parallel to the conveying path of the serially connected conveying line to achieve movement and switching between a guiding position close to the solder strip placement position and a avoiding position away from the solder strip placement position; The first welding ribbon guiding device further comprises a first supporting plate and a second supporting plate located at both sides of the welding ribbon placement position, wherein the first supporting plate and the second supporting plate are configured to be able to be synchronously lifted and lowered between a supporting position and a releasing position, wherein the supporting position is higher than the releasing position; After the welding tape distribution device pulls the welding tape group onto the battery cell located at the welding tape placement position, the tail end of the welding tape group is supported on the first guide plate located at the guide position; When the first support plate and the second support plate rise to the supporting position, they respectively support the end plates on both sides of the press placed on the solder ribbon group by the transport device, so that the first type of press pins at both ends of the press do not contact the solder ribbon group, and the second type of press pins in the middle of the press press the solder ribbon group onto the battery cell, wherein, in the non-pressed state, the bottom surface of the first type of press pins is higher than the bottom surface of the second type of press pins; When the cloth welding tape device releases the leading end of the welding tape group, the first guide plate is configured to move to the avoidance position to release the trailing end of the welding tape group, and the first support plate and the second support plate are configured to be synchronously lowered to the release position so that the first type of pressure needles at both ends of the pressing tool press the trailing end and the leading end of the welding tape group onto the battery cell respectively.

12. The battery stringing device according to claim 11, characterized in that, The first welding strip guiding device further includes a first supporting arm, a second supporting arm, a first lifting assembly, a second lifting assembly, a first elastic pressing assembly, a second elastic pressing assembly and a third driving mechanism, wherein: The first support arm and the second support arm are arranged on both sides of the serially connected conveyor line, and are both connected to the third driving mechanism in a transmission manner. The two ends of the first guide plate are respectively connected to the first support arm and the second support arm. The first support arm and the second support arm are respectively provided with a first support surface and a second support surface in a direction away from the first guide plate, wherein the first support surface is higher than the second support surface. The third driving mechanism is configured to drive the first supporting arm and the second supporting arm to move parallel to the conveying path of the serially connected conveying line, so as to drive the first guide plate to move and switch between the guiding position and the avoiding position; The first lifting assembly is connected to the first side wall of the serially connected conveyor line in a lifting and sliding manner, the second lifting assembly is connected to the second side wall of the serially connected conveyor line in a lifting and sliding manner, the first support plate is connected to the first lifting assembly, and the second support plate is connected to the second lifting assembly; The first elastic pressing assembly is connected to the first side wall of the serially connected conveying line, and the second elastic pressing assembly is connected to the second side wall of the serially connected conveying line; When the first guide plate moves to the guide position, the first elastic pressing assembly is configured to elastically press the first lifting assembly onto the first supporting surface of the first supporting arm, and the second elastic pressing assembly is configured to elastically press the second lifting assembly onto the first supporting surface of the second supporting arm, and the first supporting plate and the second supporting arm are located at the supporting position; When the first guide plate moves to the avoidance position, the first elastic pressing assembly is configured to elastically press the first lifting assembly onto the second supporting surface of the first supporting arm, and the second elastic pressing assembly is configured to elastically press the second lifting assembly onto the second supporting surface of the second supporting arm, and the first support plate and the second support are located at the release position.

13. The battery stringing device according to claim 12, wherein, The second lifting assembly has the same structure as the first lifting assembly, and the second elastic pressing assembly has the same structure as the first elastic pressing assembly; The first lifting assembly includes a slider and a roller, wherein the slider is connected to the first side wall of the serial conveyor line via a vertical slide rail so as to be liftable and slidable, the roller is arranged on the slider and supported on the first support arm, and the first support plate is connected to the top of the slider; The first elastic clamping assembly includes a pressure block and a spring, wherein the pressure block is fixed on the first side wall of the serial conveyor line and is located above the roller, the upper end of the spring abuts against the pressure block, and the lower end of the spring abuts against the slider; When the first guide plate moves from the avoidance position to the guide position, the roller slides from the second support surface of the first support arm to the first support surface of the first support arm, and the slider slides upward, so that the first support plate rises to the support position, and the spring is compressed; When the first guide plate moves from the guide position to the avoidance position, the roller slides from the first support surface of the first support arm to the second support surface of the first support arm, and the spring rebounds after losing pressure, pushing the slider to slide downward, so that the first support plate drops to the release position.

14. The battery stringing device according to claim 10, characterized in that, The battery stringing device further includes a second welding ribbon guiding device, which includes a second guiding plate and a fourth driving mechanism, wherein: The second guide plate is located above the serially connected conveyor line and in front of the first guide plate, and a second gap for the battery sheet to pass through is provided between the second guide plate and the conveying surface of the serially connected conveyor line; The second guide plate is in transmission connection with the fourth driving mechanism, and the fourth driving mechanism is configured to drive the second guide plate to move parallel to the conveying path of the serial conveying line, so that the second guide plate moves and switches between a first intersection position away from the first guide plate and a second intersection position close to the first guide plate; When the second guide plate moves to the first handover position, the welding tape group pulled by the cloth welding tape device falls onto the second guide plate. When the second guide plate moves to the second handover position, the welding tape group transitions to the first guide plate under the pulling of the cloth welding tape device. The second guide plate is provided with a plurality of second guide grooves, and each of the second guide grooves is used for accommodating a welding strip in the welding strip group.

15. The battery stringing device according to claim 14, characterized in that, The second welding strip guiding device further comprises a third supporting arm and a fourth supporting arm, wherein: The third support arm and the fourth support arm are arranged on both sides of the serially connected conveyor line, and are both connected to the fourth driving mechanism in a transmission manner. Both ends of the second guide plate are connected to the third support arm and the fourth support arm respectively. The fourth driving mechanism is configured to drive the third support arm and the fourth support arm to move parallel to the conveying path of the serial conveying line, so as to drive the second guide plate to move and switch between the first handover position and the second handover position.

16. A method for stringing batteries, characterized in that, The method is used to connect N battery cells with welding strips on the first surface into a battery string, wherein all welding strips on the first surface of the battery cells extend outward and are interconnected through a connecting strip, and the battery stringing method comprises: After placing the first battery cell with the first surface facing downward at the battery cell placement position, the first battery cell is stepped forward to the cache position to vacate the battery cell placement position; After placing the second battery cell with the first surface facing downward at the battery cell placement position, the first and second battery cells are stepped forward simultaneously, so that the second battery cell is stepped forward to the buffer position, and the first battery cell is stepped forward to the solder strip placement position, leaving the battery cell placement position vacant; Set the initial value of i to 1, and determine whether i is greater than N-2. If i is not greater than N-2, pull the i-th solder ribbon group to the i-th battery cell located at the solder ribbon placement position, and make the tail end of the i-th solder ribbon group overlap the connecting strip on the i+1-th battery cell located at the cache position; Placing the i-th presser on the i-th welding ribbon group, and placing the i+2-th battery cell with the first surface facing downward at the battery cell placement position; All the cells are stepped forward simultaneously, so that the (i+2)th cell is stepped forward to the cache position, and the (i+1)th cell is stepped forward to the solder strip placement position, leaving the cell placement position vacant; i+1 is changed to execute the step of determining whether i is greater than N-2; If i is greater than N-2, the N-1th welding ribbon group is pulled to the N-1th battery cell located at the welding ribbon placement position, and the tail end of the N-1th welding ribbon group is placed on the connecting strip on the Nth battery cell located at the cache position; Placing the N-1th press onto the N-1th welding ribbon group; Stepping the Nth battery cell forward to the welding ribbon placement position, pulling the Nth welding ribbon group onto the Nth battery cell, and placing the Nth pressing tool onto the Nth welding ribbon group; Wherein: the battery cell placement position, the cache position, and the welding strip placement position are arranged successively along the first direction; Fix each welding ribbon group to the corresponding battery cell.

17. The battery stringing method according to claim 16, wherein, Placing the i-th press tool onto the i-th solder ribbon group is implemented synchronously with placing the first surface of the (i + 2)-th solar cell downward onto the solar cell placement position.

Images