Solder strip pressing device and series connection machine

Abstract

The utility model provides a welding strip pressing device and a series connection machine. The welding strip pressing device comprises a frame, a pressing plate and a pressing plate, the at least two pressing needle rows are arranged on the frame, each pressing needle row comprises a plurality of pressing needles which are arranged at intervals, and each pressing needle comprises a needle body, a first pressing foot and a second pressing foot which are oppositely arranged on the two sides of the pressing end of the needle body; in the same pressing needle row, the first pressing feet of all the pressing needles are located on a first straight line and are used for pressing a welding strip onto a battery piece; the second pressing feet of all the pressing needles are located on a second straight line parallel to the first straight line and used for pressing the other welding strip to the battery piece. And the two welding strips pressed by the same needle pressing row are adjacent to each other. According to the welding strip pressing device, the first pressing foot and the second pressing foot are oppositely arranged on the two sides of the pressing end of the pressing needle body, so that each pressing needle row can press two adjacent welding strips, the number of pressing needles on the welding strip pressing device can be greatly reduced, the installation workload of the pressing needles is reduced, and the structure of the welding strip pressing device is simplified.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production, and specifically to a welding strip pressing device and a stringing machine. Background Art

[0002] In the production process of battery assemblies, there is a process of stacking battery cells and welding ribbons and connecting them in series to form a battery string. When the battery cells and welding ribbons are stacked, a welding ribbon clamping device is required to clamp and position the welding ribbons.

[0003] The traditional solder strip clamping device usually includes a frame and a plurality of pressure pin rows installed on the frame, and each pressure pin row is used to clamp a corresponding solder strip. In order to be able to clamp all the solder strips, it is necessary to install pressure pin rows that match the number of solder strips to be clamped on the frame. Since each pressure pin row includes a plurality of pressure pins arranged in a straight line, when there are many solder strips to be clamped on the battery cell, such as 18 or 24 solder strips to be clamped, the number of pressure pins on the traditional solder strip clamping device will be very large, and the arrangement will be dense, resulting in a large workload for pressure pin installation and a complex device structure. Utility Model Content

[0004] In view of the above technical problems existing in the traditional solder strip clamping device, the present application provides a solder strip clamping device, and its detailed technical solution is as follows:

[0005] A welding strip pressing device, comprising:

[0006] frame;

[0007] At least two pressing needle rows are arranged on the frame, each pressing needle row includes a plurality of pressing needles arranged at intervals, and the pressing needle includes a needle body and a first pressing foot and a second pressing foot which are arranged on both sides of a pressing end of the needle body;

[0008] In the same row of press pins, the first press pins of all press pins are located on a first straight line, for pressing a solder strip onto a battery cell; the second press pins of all press pins are located on a second straight line parallel to the first straight line, for pressing another solder strip onto a battery cell;

[0009] The two solder strips pressed by the same pin row are adjacent.

[0010] The solder strip pressing device provided in the present application has a first pressing foot and a second pressing foot arranged on both sides of the pressing end of the pressing needle body. In this way, each row of pressing needles can press two adjacent solder strips. In this way, the number of pressing needles on the solder strip pressing device can be greatly reduced, thereby reducing the installation workload of the pressing needles and simplifying the structure of the solder strip pressing device.

[0011] In some embodiments, in each row of presser needles, the first presser feet of all the presser needles are arranged equidistantly along a first straight line, and the second presser feet of all the presser needles are arranged equidistantly along a second straight line.

[0012] The uniformity of the pressing of the pressure pin row on the corresponding two soldering strips at each position is improved, and finally the connection effect between the soldering strip and the battery cell is ensured.

[0013] In some embodiments, in each row of presser needles, the presser needles located at both ends have at least two first presser feet and at least two second presser feet.

[0014] The pressing effect of the pressure pin row on the ends of the corresponding two welding strips is improved, and finally the connection strength between the ends of the two welding strips and the battery cell is ensured.

[0015] In some embodiments, in each row of presser needles, among two adjacent presser needles located in the middle, one presser needle has two first presser feet and one second presser foot, and the other presser needle has one first presser foot and two second presser feet.

[0016] In each row of presser pins, the number of first presser pins located on the first straight line is equal to the number of second presser pins located on the second straight line, thereby ensuring consistency in the pressing effect of each row of presser pins on the corresponding two solder strips.

[0017] In some embodiments, a plurality of light-transmitting holes are provided on the frame, and when the solder ribbon pressing device presses the solder ribbon, the light-transmitting holes are used to expose at least a partial length of the solder ribbon segment.

[0018] The section to be welded of the compressed welding ribbon is exposed from the light-transmitting hole, so that welding light can be irradiated onto the section to be welded of the welding ribbon through the light-transmitting hole, thereby ensuring that the welding ribbon can be welded to the battery cell.

[0019] In some embodiments, a plurality of glue dot rows are provided on the surface of the battery cell, each glue dot row includes a plurality of glue dots arranged at intervals, the soldering tape corresponds to the glue dot rows one by one and is laid on the glue dot rows; the first pressure foot and the second pressure foot both avoid the glue dots and press the corresponding soldering tape; a plurality of light-transmitting holes are provided on the frame, and when the soldering tape pressing device presses the soldering tape, the light-transmitting holes are used to expose at least one glue dot.

[0020] Since at least one glue spot under the solder strip is exposed from the light-transmitting hole, light can be irradiated to the glue spot under the solder strip through the light-transmitting hole, so that the solder strip is bonded to the battery cell after the glue spot is cured. The first pressing foot and the second pressing foot of the pressing needle avoid the glue spot and press on the corresponding solder strip to prevent the pressing foot from covering the glue spot or bonding on the glue spot.

[0021] In some embodiments, multiple glue points are arranged on each soldering strip at intervals along the length direction; the first pressure foot and the second pressure foot both avoid the glue points and press the corresponding soldering strip; a plurality of light-transmitting holes are provided on the frame, and when the soldering strip pressing device presses the soldering strip, the light-transmitting holes are used to expose at least one glue point.

[0022] Since at least one glue spot on the soldering ribbon is exposed from the light-transmitting hole, light can be irradiated to the glue spot on the soldering ribbon through the light-transmitting hole, so that the soldering ribbon is bonded to the battery cell after the glue spot is cured. The first pressing foot and the second pressing foot of the pressing needle avoid the glue spot and press on the corresponding soldering ribbon to prevent the pressing foot from covering the glue spot or bonding on the glue spot.

[0023] In some embodiments, light-transmitting holes are used to expose all glue dots.

[0024] All glue points are exposed from the light-transmitting holes, so that light can be irradiated to all glue points through the light-transmitting holes, thereby ensuring that all glue points can be fully cured and improving the bonding strength between the solder ribbon and the battery cell.

[0025] In some embodiments, the needle body is a cylindrical structure, the upper end of the needle body is connected to the frame, the lower end of the needle body is a clamping end, and a pressing plate is connected to the clamping end; the first presser foot is integrally formed on the pressing plate and extends outward toward the first side of the needle body; the second presser foot is integrally formed on the pressing plate and extends outward toward the second side of the needle body, the second side is opposite to the first side, and the bottom surface of the second presser foot is flush with the bottom surface of the first presser foot.

[0026] By setting the pressing needle, on the one hand, the structural strength of the first pressing foot and the second pressing foot is guaranteed, and finally the pressing force of the first pressing foot and the second pressing foot on the welding strip is ensured; on the other hand, the distance between the first pressing foot and the second pressing foot is made large enough so that the pressing needle can press two adjacent welding strips.

[0027] In some embodiments, the upper end of the needle body of the pressing needle passes through the frame and can move up and down relative to the frame, and a baffle is provided at the top of the needle body passing through the frame to prevent the needle body from falling off the frame downward; a spring is provided on the needle body, the upper end of the spring rests on the frame, and the lower end of the spring rests on the raised portion at the lower end of the needle body; below the raised portion of the needle body is the clamping end, which is located below the frame.

[0028] By setting the installation method of the needle body of the press needle on the frame, arranging a baffle at the top of the needle body, and arranging a spring between the needle body and the frame, the presser foot of the press needle can be elastically pressed on the corresponding welding strip.

[0029] In some embodiments, the pressure needles at the head end of each pressure needle row are all first-type pressure needles, and the pressure needles at non-head ends of each pressure needle row include second-type pressure needles and the first-type pressure needles, or both, and the length of the first-type pressure needles is shorter than that of the second-type pressure needles.

[0030] When the solder strip clamping device is used to clamp the solder strip clamped by the clamp of the solder strip traction mechanism, by controlling the height of the solder strip clamping device, it can be ensured that the longer second-type pressure pins in the pressure pin row are pressed onto the solder strip first, and the shorter first-type pressure pins at the head end of each pressure pin row do not contact the head end of the solder strip, thereby achieving the clamping and positioning of the solder strip on the one hand, and avoiding the head end of the solder strip in a raised state from being pressed and deformed on the other hand; when the solder strip traction mechanism releases the head end of the solder strip, the solder strip clamping device is controlled to continue to descend, so that the shorter first-type pressure pins at the head end of each pressure pin row are finally pressed onto the head end of the solder strip, thereby effectively avoiding the occurrence of the head warping phenomenon.

[0031] In some embodiments, the pressure needles at the tail end of each pressure needle row are all first-type pressure needles.

[0032] In this way, during press-fitting, there is no need to distinguish between the head end and the tail end of the press pin row, and either the head end or the tail end of the press pin row can be placed close to the head end of the solder strip.

[0033] The present application also provides a stringing machine, which includes a stringing conveying device having a conveyor belt and a solder tape pressing device as described in any one of the above items, the stringing conveying device is used to convey battery cells and solder tapes laid on the conveyor belt, and each row of pressure needles of the solder tape pressing device presses two adjacent solder tapes onto the battery cells.

[0034] By using the serial connection machine provided in the present application, all the soldering ribbons can be pressed onto the battery cells using fewer pressing needles before serial connection of the soldering ribbons to the corresponding battery cells, thereby ensuring the serial connection quality of the soldering ribbons and preventing false connections.

[0035] In some embodiments, the stringing machine further includes a welding mechanism, which is disposed above a conveyor belt, and the conveyor belt is used to transport the stacked battery cells, welding ribbons, and welding ribbon pressing devices to the bottom of the welding mechanism, and the welding mechanism is used to weld the welding ribbons to the battery cells; or,

[0036] The serial connection machine also includes a heating device, which is arranged above the conveyor belt. Hot melt adhesive spots are arranged on the battery cells or the soldering strips. The conveyor belt is used to transport the stacked battery cells, the soldering strips and the soldering strip pressing device to the bottom of the heating device. The heating device is used to heat the hot melt adhesive spots to melt the hot melt adhesive spots. After the hot melt adhesive spots are solidified, the soldering strips are bonded to the battery cells; or,

[0037] The stringing machine also includes a UV light box, which is arranged at least one of the above and below the conveyor belt. UV glue spots are arranged on the battery cells or welding strips. The conveyor belt is used to transport the stacked battery cells, welding strips and welding strip pressing devices to the UV light box. The UV light box is used to irradiate the UV glue spots so that the welding strips are bonded to the battery cells through the cured UV glue spots.

[0038] For solder strips with solder coated on the surface, a welding mechanism is provided to melt the solder on the surface of the solder strip, thereby welding the solder strip to the battery cell; for hot melt adhesive spots on the battery cell or solder strip, a heating device is provided to heat the hot melt adhesive spots, thereby bonding the solder strip to the battery cell when the hot melt adhesive spots are melted by heat and then solidified; for UV adhesive spots on the battery cell or solder strip, a UV light box is provided to bond the solder strip to the battery cell after the UV adhesive spots are solidified. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the top view of the structure of the welding strip pressing device in the embodiment of the present application;

[0040] Figure 2 It is a bottom view structural schematic diagram of the welding ribbon pressing device in the embodiment of the present application;

[0041] Figure 3 It is a side structural schematic diagram of the welding ribbon pressing device in the embodiment of the present application;

[0042] Figure 4 for Figure 3 AA section view;

[0043] Figure 5 It is a schematic diagram of the structure of the pressing pins at both ends of the pressing pin row in the embodiment of the present application;

[0044] Figure 6 Schematic diagram of the structure of the pressing pin at the middle position of the pressing pin row in the embodiment of the present application;

[0045] Figure 7 This is a schematic diagram of the effect of the solder strip pressing device in the embodiment of the present application being pressed onto a battery cell with glue dots disposed on the surface;

[0046] Figure 8 for Figure 7 Enlarged view of area B;

[0047] Figures 1 to 8 Included:

[0048] Frame 1;

[0049] Needle pressing row 2;

[0050] Pressing needle 3: needle body 31, first pressing foot 32, second pressing foot 33, pressing plate 34, protruding part 36;

[0051] Light transmission hole 4;

[0052] First type of press needle 3A, second type of press needle 3B;

[0053] Solder ribbon 100, battery cell 200, glue dot 300. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0055] like Figure 1 and Figure 2 As shown, the solder strip pressing device in the embodiment of the present application includes a frame 1 and at least two (for example, 12 in the figure) pressure pin rows 2. Each pressure pin row 2 is arranged on the frame 1 at intervals along a first horizontal direction (such as the X-axis direction in the figure). Each pressure pin row 2 includes a plurality of (for example, 15 in the figure) pressure pins 3 arranged at intervals along a second horizontal direction (such as the Y-axis direction in the figure). The pressure pin 3 includes a needle body 31 and a first pressure foot 32 and a second pressure foot 33 arranged on both sides of the pressing end of the needle body 31.

[0056] In the same pressing pin row 2, the first pressing feet 32 ​​of all pressing pins 3 are located on the first straight line, which is used to press one solder strip 100 onto the battery cell. The second pressing feet 32 ​​of all pressing pins 2 are located on the second straight line parallel to the first straight line, which is used to press another solder strip 100 onto the battery cell.

[0057] Two solder strips 100 pressed by the same pressing pin row 2 are adjacent.

[0058] Since the first pressing foot 32 and the second pressing foot 33 are relatively arranged on both sides of the pressing end of the needle body 31 of the pressing needle 3, each pressing needle row 2 can press two adjacent solder strips 100, thereby greatly reducing the number of pressing needles on the solder strip pressing device in the embodiment of the present application, ultimately reducing the installation workload of the pressing needles and simplifying the structure of the solder strip pressing device.

[0059] Optionally, in each pin row 2, the first pins 32 of all pins 3 are arranged equidistantly along the first straight line, and the second pins 33 of all pins 3 are arranged equidistantly along the second straight line. In this way, the uniformity of the pressing of each pin row 2 on the corresponding two solder strips at each position can be ensured.

[0060] like Figure 2 and Figure 5 As shown, optionally, in each pressure pin row 2, the pressure pins 3 at the two end positions have at least two (for example, two in the figure) first pressure feet 32 ​​and at least two (for example, two in the figure) second pressure feet 33. Such an arrangement can improve the compression effect of the pressure pin row 2 on the ends of the corresponding two solder strips, and ultimately ensure the connection strength between the ends of the solder strips and the battery cell.

[0061] like Figure 2 and Figure 6As shown, optionally, in each pin row 2, among two adjacent pins 3 located in the middle position (i.e., other positions except the two end positions), one pin 3 has two first presser feet 32 ​​and one second presser foot 33, and the other pin 3 has one first presser foot 32 and two second presser feet 33. By arranging the pins 3 in the middle position in this way, it can be achieved that: in each pin row 2, the number of first presser feet 32 ​​located on the first straight line is equal to the number of second presser feet 33 located on the second straight line, thereby ensuring that each pin row 2 has equal pressing effect on the corresponding two solder strips 100.

[0062] In some embodiments, the surface of the solder strip used is coated with solder. When the soldering light (such as infrared light, laser, etc.) irradiates the solder strip, the solder on the surface of the solder strip melts, thereby welding the solder strip to the battery cell. In order to ensure that the soldering light can pass through the solder strip clamping device of the present application and irradiate onto the clamped solder strip 100, as shown in FIG. Figure 2 As shown, optionally, a plurality of light-transmitting holes 4 are provided on the frame 1. When the soldering ribbon pressing device presses the soldering ribbon 100, the light-transmitting holes 4 are used to expose at least a partial length of the soldering ribbon segment, and the exposed soldering ribbon segment is the soldering ribbon segment of the soldering ribbon 100 to be welded.

[0063] Since the section of the soldering tape 100 to be welded is exposed from the light-transmitting hole 4, the welding light can be irradiated to the section of the soldering tape 100 to be welded through the light-transmitting hole 4, and finally the solder on the section of the soldering tape 100 to be welded is melted, thereby welding the soldering tape 100 to the battery cell.

[0064] In other embodiments, Figure 7 As shown, the surface of the battery cell 200 is along the first horizontal direction (eg Figure 7 A plurality of glue dot rows are arranged along the second horizontal direction (such as the X-axis direction in FIG. 1 ), each glue dot row includes a plurality of glue dot rows along the second horizontal direction (such as Figure 7 The plurality of glue dots 300 are arranged at intervals (in the Y-axis direction in FIG. 1 ). The soldering ribbons 100 correspond to the glue dot rows one by one and are laid on the glue dot rows. In addition, the width of the glue dots 300 is greater than the width of the soldering ribbons 100, and the soldering ribbons 100 will not completely cover the glue dots 300 when laid on the glue dots 300. The glue dots can be any glue in the prior art, as long as it can achieve bonding the soldering ribbon to the battery cell after curing, such as hot melt glue, UV glue, etc.

[0065] In order to ensure that light can pass through the solder tape pressing device of the present application and irradiate the glue spot 300 to solidify the glue spot, and then bond the solder tape 100 to the battery cell 200, optionally, a plurality of light-transmitting holes 4 are provided on the frame 1. When the solder tape pressing device presses the solder tape 100, the light-transmitting holes 4 are used to expose at least one glue spot 300 under the solder tape 100, so that light can pass through the light-transmitting holes 4 and irradiate at least one glue spot 300 under the solder tape 100, so that the irradiated glue spot is solidified, and the solder tape 100 is bonded to the battery cell 200.

[0066] In some other embodiments, the glue spots are not arranged on the battery cells, but are pre-arranged on the soldering tape 100, that is, a plurality of glue spots 300 are arranged at intervals along the length direction on each soldering tape 100. After the soldering tape 100 is laid on the battery cells 200, the soldering tape 100 can be glued to the battery cells 200 by curing the glue spots 300 on the soldering tape 100.

[0067] Similarly, in order to ensure that light can pass through the solder tape pressing device of the present application and irradiate the glue point 300 to solidify the glue point 300, and then bond the solder tape 100 to the battery cell 200, a plurality of light-transmitting holes 4 are provided on the frame 1. When the solder tape pressing device presses the solder tape 100, the light-transmitting holes 4 are used to expose at least one glue point 300 on the solder tape 100, so that light can pass through the light-transmitting holes 4 and irradiate at least one glue point 300 on the solder tape 100, so that the irradiated glue point 300 is solidified, and finally the solder tape 100 is bonded to the battery cell 200.

[0068] Of course, by further setting the number and setting positions of the light-transmitting holes 4, the light-transmitting holes 4 can expose all the glue spots 300 on the battery cell 200 or the soldering tape 100, so that light can be irradiated to all the glue spots 300 through the light-transmitting holes 4, thereby further improving the bonding uniformity and bonding strength between each soldering tape 100 and the battery cell 200.

[0069] In order to prevent the first presser foot 32 and the second presser foot 33 from covering the glue spot 300 or adhering to the glue spot 300 , optionally, the first presser foot 32 and the second presser foot 33 both avoid the glue spot 300 and press the corresponding welding strip 100 .

[0070] like Figures 5 and 6As shown, optionally, the needle body 31 of the pressure needle 3 in the embodiment of the present application is a cylindrical structure, the upper end of the needle body 31 is mounted on the frame 1, and a pressing plate 34 is connected to the pressing end (i.e., the lower end) of the needle body 31. The first presser foot 32 is integrally formed on the pressing plate 34 and extends outward toward the first side of the needle body. The second presser foot 33 is integrally formed on the pressing plate 34 and extends outward toward the second side of the needle body 31, the second side is opposite to the first side, and the bottom surface of the second presser foot 33 is flush with the bottom surface of the first presser foot 32. Such a configuration ensures, on the one hand, the structural strength of the first presser foot 32 and the second presser foot 33, and ultimately ensures the pressing force of the first presser foot 32 and the second presser foot 33 on the welding strip 100, and on the other hand, the spacing between the first presser foot 32 and the second presser foot 33 is large enough, so that the pressure needle 3 can achieve the pressing of two adjacent welding strips 100.

[0071] like Figure 3 to Figure 4 As shown, optionally, the upper end of the needle body 31 of the pressing needle 3 passes through the frame 1 and can move up and down relative to the frame, and the top of the needle body 31 passing through the frame 1 is provided with a baffle (not shown in the figure) to prevent the needle body 31 from falling off the frame downward. A spring (not shown in the figure) is sleeved on the needle body 31, the upper end of the spring abuts against the frame 1, and the lower end of the spring abuts against the raised portion 36 at the lower end of the needle body 31. Below the raised portion 36 of the needle body 31 is the clamping end, which is located below the frame 1. When the first presser foot 32 and the second presser foot 33 of the pressing needle 3 are pressed on the welding strip, the spring is compressed to apply elastic force to the first presser foot 32 and the second presser foot 33.

[0072] As known to those skilled in the art, when laying the welding ribbon, the head end of the welding ribbon is pulled by the clamp of the welding ribbon pulling mechanism, and the tail end is clamped by the tail clamp. When the head end is pulled, the head end is lifted, and its position is higher than the tail end, and the welding ribbon as a whole is inclined upward. The lengths of all the pressure pins in the row of pressure pins on the existing welding ribbon clamping device are equal. When the welding ribbon clamping device is used to clamp the welding ribbon, since the head end of the welding ribbon is in a high position and is still clamped by the clamp, when the welding ribbon is clamped by the welding ribbon clamping device and the clamp is released, the welding ribbon at the head end will be deformed by compression and become tilted, affecting subsequent welding.

[0073] In view of this, optional, such as Figures 2 to 4 As shown, in the solder strip pressing device in the embodiment of the present application, the pressure pins at the head end of each pressure pin row 2 are all first-type pressure pins 3A, and the pressure pins at the non-head end of each pressure pin row 2 include the first-type pressure pins 3B and the first-type pressure pins 3A, or both, and the length of the first-type pressure pins 3A is shorter than that of the second-type pressure pins 3B.

[0074] That is to say, the pressing needles at the head end of each pressing needle row 2 are shorter first-type pressing needles 3A, and the non-head end pressing needles of each pressing needle row 2 can all be longer second-type pressing needles 3B, or a combination of the second-type pressing needles 3B and the first-type pressing needles 3A. When the non-head end pressing needles of each pressing needle row 2 are a combination of the second-type pressing needles 3B and the first-type pressing needles 3A, the number configuration and position arrangement of the second-type pressing needles 3B and the first-type pressing needles 3A can be arbitrary.

[0075] When the solder strip clamping device of the embodiment of the utility model is used to clamp the solder strip clamped by the clamp of the solder strip pulling mechanism, by controlling the height of the solder strip clamping device, it can be ensured that the first presser foot 32 and the second presser foot 33 of the longer second type presser 3B in each presser row 2 press the corresponding two solder strips, and the first presser foot 32 and the second presser foot 33 of the shorter first type presser 3A at the head end of each presser row 2 do not contact the head ends of the two solder strips, thereby preventing the head end of the solder strip in the raised state from being pressed and deformed. After the solder strip pulling mechanism releases the head end of the solder strip, the solder strip clamping device is controlled to continue to descend, and the first presser foot 32 and the second presser foot 33 of the shorter first type presser 3A at the head end of each presser row 2 finally press on the head ends of the two solder strips.

[0076] Optionally, the pressure pin at the tail end of the pressure pin row 2 can also be set to a shorter first-type pressure pin 3A. With this setting, there is no need to distinguish between the head and tail ends of the pressure pin row 2 during press-fitting. Either the head or tail end of the pressure pin row 2 can be placed close to the head end of the solder strip.

[0077] The present application also provides a stringing machine, which includes a stringing conveying device having a conveyor belt and a solder tape pressing device provided by any of the above embodiments, wherein the stringing conveying device is used to convey battery cells and solder tapes laid on the conveyor belt, and each row of pressure needles of the solder tape pressing device correspondingly presses two adjacent solder tapes onto the battery cells.

[0078] In some application scenarios, the surface of the solder strip is coated with solder, and the solder is melted at high temperature to weld the solder strip to the battery cell. Correspondingly, the serial connection machine in the embodiment of the present application also includes a welding mechanism, which is arranged above the conveyor belt, and the conveyor belt is used to convey the stacked battery cells, solder strips and solder strip clamping devices to the bottom of the welding mechanism, and the welding mechanism is used to weld the solder strip to the battery cell. Optionally, the welding mechanism is an infrared light box or a laser heater.

[0079] In other application scenarios, hot melt adhesive spots are provided on the battery cells or solder strips, and when the hot melt adhesive spots are heated and melted, the solder strips are soldered to the battery cells. Correspondingly, the serial connection machine in the embodiment of the present application also includes a heating device, which is provided above the conveyor belt, and the conveyor belt is used to convey the stacked battery cells, solder strips and solder strip pressing devices to the bottom of the heating device, and the heating device is used to heat the hot melt adhesive spots to melt the hot melt adhesive spots, and after the hot melt adhesive spots are cured, the solder strips are bonded to the battery cells, and the heating device can be, for example, an infrared light box.

[0080] In some other application scenarios, UV glue spots are provided on the battery cells or solder strips, and when the UV glue spots are cured, the solder strips are welded to the battery cells. Correspondingly, the serial connection machine in the embodiment of the present application also includes a UV light box, and the UV light box is arranged above or below the conveyor belt according to the orientation of the UV glue spots, or above and below the conveyor belt. The conveyor belt is used to transport the stacked battery cells, solder strips and solder strip clamping devices to the UV light box, and the UV light box is used to irradiate the UV glue spots so that the solder strips are bonded to the battery cells through the cured UV glue spots.

[0081] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A welding strip pressing device, characterized in that: The welding strip pressing device comprises: frame; At least two pressure needle rows are arranged on the frame, each of the pressure needle rows includes a plurality of pressure needles arranged at intervals, and the pressure needle includes a needle body and a first pressure foot and a second pressure foot arranged on both sides of a pressing end of the needle body; In the same row of press pins, the first press pins of all press pins are located on a first straight line, for pressing a solder strip onto a battery cell; the second press pins of all press pins are located on a second straight line parallel to the first straight line, for pressing another solder strip onto a battery cell; The two welding strips pressed by the same pressing needle row are adjacent.

2. The welding strip pressing device according to claim 1, characterized in that: In each of the pressing needle rows, the first pressing feet of all the pressing needles are arranged equidistantly along the first straight line, and the second pressing feet of all the pressing needles are arranged equidistantly along the second straight line.

3. The welding strip pressing device according to claim 1, characterized in that: In each of the pressing needle rows, the pressing needles located at both ends have at least two of the first pressing feet and at least two of the second pressing feet.

4. The welding strip pressing device according to claim 1, characterized in that: In each of the pressing needle rows, among the two adjacent pressing needles located in the middle, one pressing needle has two of the first pressing feet and one of the second pressing feet, and the other pressing needle has one of the first pressing feet and two of the second pressing feet.

5. The welding strip pressing device according to claim 1, characterized in that: The frame is provided with a plurality of light-transmitting holes, and when the soldering ribbon pressing device presses the soldering ribbon, the light-transmitting holes are used to expose at least a partial length of the soldering ribbon segment.

6. The welding strip pressing device according to claim 1, characterized in that: A plurality of glue point rows are arranged on the surface of the battery cell, each of the glue point rows includes a plurality of glue points arranged at intervals, and the welding strips correspond to the glue point rows one by one and are laid on the glue point rows; The first presser foot and the second presser foot avoid the glue point and press the corresponding welding strip tightly; The frame is provided with a plurality of light-transmitting holes, and when the solder strip pressing device presses the solder strip, the light-transmitting holes are used to expose at least one of the glue points.

7. The welding strip pressing device according to claim 1, characterized in that: A plurality of glue spots are arranged at intervals along the length direction on each welding strip; The first presser foot and the second presser foot avoid the glue point and press the corresponding welding strip tightly; The frame is provided with a plurality of light-transmitting holes, and when the solder strip pressing device presses the solder strip, the light-transmitting holes are used to expose at least one of the glue points.

8. The welding strip pressing device according to claim 6 or 7, characterized in that: The light-transmitting holes are used to expose all of the glue dots.

9. The welding strip pressing device according to claim 1, characterized in that: The needle body is a cylindrical structure, the upper end of the needle body is connected to the frame, the lower end of the needle body is the pressing end, and the pressing end is connected to a pressing plate; The first presser foot is integrally formed on the pressing plate and extends outwardly toward the first side of the needle body; The second presser foot is integrally formed on the pressing plate and extends outwardly toward a second side of the needle body, the second side is opposite to the first side, and a bottom surface of the second presser foot is flush with a bottom surface of the first presser foot.

10. The welding strip pressing device according to claim 1, characterized in that: The upper end of the needle body of the pressing needle passes through the frame and can move up and down relative to the frame, and a blocking piece is provided at the top end of the needle body passing through the frame to prevent the needle body from falling off the frame downward; A spring is sleeved on the needle body, the upper end of the spring abuts against the frame, and the lower end of the spring abuts against the raised portion at the lower end of the needle body; The pressing end is located below the raised portion of the needle body, and the pressing end is located below the frame.

11. The welding strip pressing device according to claim 1, characterized in that: The pressure needles at the head end of each pressure needle row are all first-type pressure needles, and the pressure needles at non-head ends of each pressure needle row include second-type pressure needles and the first-type pressure needles or two thereof, and the length of the first-type pressure needles is shorter than that of the second-type pressure needles.

12. The welding strip pressing device according to claim 11, characterized in that: The pressure needles at the tail end of each pressure needle row are all the first type of pressure needles.

13. A serial connection machine, characterized in that: The stringing machine includes a stringing conveying device having a conveyor belt and a solder tape pressing device according to any one of claims 1 to 12, wherein the stringing conveying device is used to convey battery cells and solder tapes laid on the conveyor belt, and each row of pressing needles of the solder tape pressing device presses two adjacent solder tapes onto the battery cells.

14. The serial connection machine according to claim 13, characterized in that: The stringing machine further includes a welding mechanism, which is arranged above the conveyor belt, and the conveyor belt is used to transport the stacked battery cells, welding ribbons and the welding ribbon pressing device to the bottom of the welding mechanism, and the welding mechanism is used to weld the welding ribbons to the battery cells; or, The serial connection machine further includes a heating device, which is arranged above the conveyor belt. A hot melt adhesive spot is arranged on the battery cell or the soldering tape. The conveyor belt is used to transport the stacked battery cells, soldering tape and the soldering tape pressing device to the bottom of the heating device. The heating device is used to heat the hot melt adhesive spot to melt the hot melt adhesive spot. After the hot melt adhesive spot is solidified, the soldering tape is bonded to the battery cell. or, The stringing machine also includes a UV light box, which is arranged at least one of above and below the conveyor belt. UV glue spots are arranged on the battery cells or the soldering strips. The conveyor belt is used to transport the stacked battery cells, soldering strips and the soldering strip pressing device to the UV light box. The UV light box is used to irradiate the UV glue spots so that the soldering strips are bonded to the battery cells through the cured UV glue spots.

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