Series welding machine

Abstract

The utility model relates to a series welding machine which comprises a conveying mechanism, pressing tools and a welding mechanism, the conveying mechanism bears at least one set of to-be-welded battery strings arranged in the first direction, a plurality of pressing tools are placed on each set of battery strings, and each pressing tool presses a welding strip set stacked in the battery strings and battery pieces; the conveying mechanism further conveys the borne battery string with the pressing tool to the welding station in the first direction. The welding mechanism is installed above the welding station and provides heat for the pressing tool located on the welding station. And the pressing tool transmits the received heat to the welding strip group and the battery piece which are pressed, contacted and stacked, so that the welding strip group and the battery piece which are stacked are welded and fixed. The battery string to be welded is pressed on the conveying mechanism through the pressing tool, heat of the welding mechanism is transmitted to the battery string through the pressing tool so that the battery string can be welded, the heat of a welding heat source can be fully utilized, and the welding efficiency is improved.

Description

Technical Field

[0001] This application relates to equipment for manufacturing solar cells, and more specifically to a string welding machine. Background Art

[0002] A solar cell string is formed by stacking solder tapes and solar cells in a predetermined order and welding the solder tapes to the main grid lines of the solar cells. A common welding process for solar cell string welding is to use a conveying mechanism to receive a group of solar cells and a group of solder tapes at the loading station, and stack the group of solar cells and the group of solder tapes into a solar cell string at the loading station; then move the solar cell string to be welded to the welding station, and use a welding mechanism to weld and fix the solar cell string; then, move the welded solar cell string to the unloading station.

[0003] In order to ensure that the solder tape group of the solar cell string stacked at the loading station is closely attached to the surface of the solar cell group, in the prior art, the solder tape group is generally pressed against the solar cell group by a tooling. Since the welding mechanism is located above the tooling to heat the solar cell string, the tooling will absorb part of the heat released by the welding mechanism, thereby affecting the welding efficiency. Summary of the Utility Model

[0004] This application aims at the problem that the existing tooling affects the welding efficiency, and provides a string welding machine that can improve the welding efficiency.

[0005] The technical solution of this application is as follows: A string welding machine includes a conveying mechanism, a pressing tooling, and a welding mechanism, where:

[0006] The conveying mechanism is configured to carry at least one group of solar cell strings to be welded arranged along a first direction, and a plurality of pressing toolings are placed on each group of solar cell strings. Each pressing tooling is configured to press a stacked group of solder tapes and solar cells in the solar cell string;

[0007] The conveying mechanism is further configured to convey the solar cell string with the pressing tooling placed thereon along the first direction to the welding station;

[0008] The welding mechanism is installed above the welding station, and the welding mechanism is configured to provide heat to the pressing tooling at the welding station;

[0009] The pressing tooling is configured to conduct the received heat to the stacked solder tape group and solar cells in contact therewith, so that the stacked solder tape group and solar cells are welded and fixed.

[0010] By pressing the solar cell string to be welded against the conveying mechanism with the pressing tooling, and making the heat of the welding mechanism transfer to the solar cell string through the pressing tooling for welding, the heat of the welding heat source can be fully utilized to improve the welding efficiency.

[0011] Optionally, the pressing tooling includes a bracket and a plurality of pressing components installed on the first side of the bracket, where:

[0012] A number of pressing components are arranged in a matrix, and each pressing component includes a pressing member and at least one set of elastic members;

[0013] Each set of elastic members is configured to push the pressing member away from the bracket, so that the pressing member presses the battery string to be welded below;

[0014] A number of relief openings corresponding to the positions of each pressing member are provided on the bracket, and the relief openings allow the welding heat source on the second side of the bracket to pass through to transfer heat to the pressing member;

[0015] The pressing member is made of a heat-conducting material, and the pressing member is configured to conduct the received heat to the contacted battery string, so that the solder tape in the battery string is welded and fixed to the battery cell.

[0016] The battery string to be welded is pressed by a number of pressing components, the welding heat source passes through the bracket through the relief openings on the bracket to irradiate and heat the pressing member, and the pressing member made of a heat-conducting material transfers the heat to the battery string, which can further make full use of the heat of the welding heat source and improve the welding efficiency.

[0017] Optionally, a row of pressing components arranged along the width direction of the bracket is used to jointly press at least two solder tapes, and the length direction of the pressing member is perpendicular to the length direction of the solder tape group.

[0018] The length direction of the pressing member is configured to be perpendicular to the length direction of the solder tape: First, the pressing member is short, and each pressing member is floatingly mounted on the fixing plate through an elastic member, so the pressing member is not easily stuck; Second, the pressing member is in approximate point-to-point contact with the solder tape, and the pressing member does not heat the entire solder tape, avoiding the situation of warping of the battery cell caused by uneven heating of the battery cell and the solder tape; Third, whether the pressing member presses on the battery cell or directly presses on the solder tape, it will not cause the solder tape to deflect. When the pressing member directly presses on the solder tape, since the pressing member presses on the upper surfaces of at least two solder tapes at the same time, a plane will be formed on the upper surfaces of at least two solder tapes to bear the pressure of the pressing member at the same time. Therefore, the reaction forces of at least two solder tapes will act on the pressing member evenly and will not cause the pressing member to deflect.

[0019] Optionally, the welding mechanism includes a number of laser generators, the number of laser generators are arranged at intervals along the first direction, the length direction of the battery string to be welded is the same as the first direction, and each laser generator provides heat to at least one pressing tooling located at the welding station respectively.

[0020] The welding mechanism is configured to include multiple laser generators, which can weld multiple groups of battery strings at the same time, further improving the welding efficiency.

[0021] Optionally, the welding mechanism further includes a first driving member, and a plurality of laser generators are installed at intervals along a first direction on the driving end of the first driving member. The first driving member is configured to drive the plurality of laser generators to synchronously slide along the first direction;

[0022] After the plurality of laser generators provide heat to the pressing tooling below, the first driving member drives the plurality of laser generators to move along the first direction to other pressing tooling that still needs to be heated, so that the plurality of laser generators can provide heat to other pressing tooling that still needs to be heated.

[0023] By configuring the first driving member for the welding mechanism, the first driving member can drive the laser generator to move in the first direction, enabling the welding mechanism to operate continuously.

[0024] Optionally, each laser generator provides heat to two adjacent pressing tooling in sequence.

[0025] Each laser generator provides heat to two adjacent pressing tooling in sequence, which can shorten the moving distance of the laser generator, save the welding preparation time, and improve the welding efficiency.

[0026] Optionally, the conveying mechanism includes a conveyor belt and a driving assembly, wherein:

[0027] The driving assembly is configured to drive the conveyor belt to move. Along the first direction, a loading station, a welding station, and an unloading station are sequentially arranged on the moving path of the conveyor belt;

[0028] The conveyor belt is used to carry the battery string to be welded and the pressing tooling at the loading station, and convey the battery string and the pressing tooling to the welding station;

[0029] The conveyor belt is also used to move the welded battery string from the welding station to the unloading station.

[0030] The conveying mechanism adopts a conveyor belt, which has a simple structure and low cost.

[0031] Optionally, the conveying mechanism includes a transfer platform and a sliding assembly, wherein:

[0032] The sliding assembly is configured to drive the transfer platform to move, so that the transfer platform sequentially passes through the loading station, the welding station, and the unloading station along the first direction;

[0033] The transfer platform is configured to carry the battery string to be welded and the pressing tooling at the loading station, and convey the battery string and the pressing tooling to the welding station;

[0034] The transfer platform is also configured to move the welded battery string from the welding station to the unloading station.

[0035] The conveying mechanism adopts a transfer platform with good rigidity, which can stably and accurately convey the battery string and the pressing tooling.

[0036] Optionally, the conveying mechanism includes two transfer platforms arranged at intervals in the second direction, where the second direction is perpendicular to the first direction in the horizontal plane;

[0037] The sliding assembly is configured to drive the two transfer platforms to move cyclically between the loading station, the welding station, and the unloading station respectively.

[0038] The conveying mechanism adopts two transfer platforms, which can act alternately, saving the preparation time for welding.

[0039] Optionally, the welding mechanism includes a welding heat source and a second driving member, where:

[0040] The welding station includes a first station and a second station arranged at intervals in the second direction. The sliding assembly is configured to drive the first transfer platform to move cyclically between the loading station, the first station, and the unloading station, and the sliding assembly is also configured to drive the second transfer platform to move cyclically between the loading station, the second station, and the unloading station;

[0041] When the sliding assembly drives the first transfer platform to move to the first station, the second driving member is configured to drive the welding heat source to horizontally slide along the second direction to directly above the first station, and the welding heat source is configured to provide heat to a plurality of pressing tools at the first station;

[0042] When the sliding assembly drives the second transfer platform to move to the second station, the second driving member is further configured to drive the welding heat source to horizontally slide along the second direction to directly above the second station, and the welding heat source is further configured to provide heat to a plurality of pressing tools at the second station.

[0043] By configuring the second driving member, the welding mechanism can switch between two welding stations, and the two welding stations can operate continuously, shortening the preparation and waiting time.

[0044] Optionally, the string welding machine further includes a battery cell supply mechanism, a solder tape group supply mechanism, and an unloading mechanism, where:

[0045] The bearing surface of the conveying mechanism sequentially passes through the loading station, the welding station, and the unloading station along the first direction;

[0046] The solder tape group supply mechanism is used to place a plurality of solder tape groups on the bearing surface of the conveying mechanism at the loading station, and the battery cell supply mechanism is used to place a plurality of battery cells on the bearing surface of the conveying mechanism at the loading station, so that a plurality of battery cells and a plurality of solder tape groups form a battery string;

[0047] The conveying mechanism is used to convey the battery string at the loading station to the welding station, and the conveying mechanism is also used to convey the welded battery string at the welding station to the unloading station, and the unloading mechanism is used to take away the welded battery string at the unloading station.

[0048] By configuring the battery cell supply mechanism to supply battery cells, the solder tape group supply mechanism to supply solder tapes, and the blanking mechanism to blank the welded battery strings, the whole process of battery string welding from loading to blanking can be automated, greatly improving the production efficiency.

[0049] Optionally, the string welding machine includes a first handling component, a second handling component, and a conveyor line, where:

[0050] The conveyor line is parallel to the conveying mechanism, and the conveyor line is used to convey the pressing tooling in the direction opposite to the first direction;

[0051] The first handling component is used to move the pressing tooling on the conveyor line to the battery string to be welded on the conveying mechanism;

[0052] The second handling component is used to move the pressing tooling on the welded battery string on the conveying mechanism to the conveyor line.

[0053] By configuring a conveyor line that runs in the opposite direction to the conveying mechanism, the recycling of the pressing tooling can be realized, and the utilization rate of the pressing tooling can be improved. Description of the Drawings

[0054] Figure 1 It is a three-dimensional structural schematic diagram of an optional embodiment of the present application;

[0055] Figure 2 is Figure 1 front view of;

[0056] Figure 3 It is the front view of another optional embodiment of the present application;

[0057] Figure 4 It is the front view of yet another optional embodiment of the present application;

[0058] Figure 5 It is a three-dimensional structural schematic diagram of an optional embodiment of the pressing tooling in the present application;

[0059] Figure 6 is Figure 5 top view of.

[0060] Figures 1 to 6 In, it includes:

[0061] String welding machine 1;

[0062] Pressing tooling 10, bracket 11, support 111, fixing plate 112, relief opening 113, pressing component 12, pressing piece 121, boss 131, elastic piece 122, support rod 141, spring 142, locking component 143, conveying mechanism 20, conveyor belt 21, drive component 22, transfer platform 23, sliding component 24;

[0063] Welding mechanism 30, first driving member 31, second driving member 32, laser generator 33;

[0064] First handling component 41, second handling component 42;

[0065] Conveyor line 50;

[0066] Battery string 100, battery cell 101, welding tape 102;

[0067] Loading station 201, welding station 202, unloading station 203;

[0068] First direction 301, second direction 302. Detailed implementation manner

[0069] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0070] As Figures 1 to 4 shown, the present application is a string welding machine 1 for welding battery cells into a battery string. Figure 1 、 Figure 2 Shown is an embodiment of the present application, Figure 3 Shown is another embodiment, Figure 4 Shown is yet another embodiment.

[0071] The string welding machine 1 in the above various embodiments all includes a conveying mechanism 20, a pressing tooling 10, and a welding mechanism 30.

[0072] Among them: The conveying mechanism 20 is configured to carry at least one group of battery strings to be welded arranged along the first direction 301. A plurality of pressing toolings 10 are placed on each group of battery strings, and each pressing tooling 10 is configured to press a stacked group of welding tapes in the battery string against the battery cells;

[0073] The conveying mechanism 20 is further configured to convey the battery string carrying the pressing tooling 10 along the first direction 301 to the welding station 202;

[0074] The welding mechanism 30 is installed above the welding station 202, and the welding mechanism 30 is configured to provide heat to the pressing tooling 10 at the welding station 202;

[0075] The pressing tooling 10 is configured to conduct the received heat to the stacked group of welding tapes and the battery cells in pressing contact therewith, so that the stacked group of welding tapes and the battery cells are welded and fixed.

[0076] The battery string to be welded is pressed on the conveying mechanism 20 by the pressing tooling 10, and the heat of the welding mechanism 30 is transferred to the battery string through the pressing tooling 10 to weld it, which can make full use of the heat of the welding heat source and improve the welding efficiency.

[0077] As an alternative implementation, as Figure 5 , Figure 6 shown, the pressing tooling 10 includes a bracket 11 and a plurality of pressing components 12 installed on the first side of the bracket 11 ( Figure 5 the lower side in ).

[0078] Among them: the plurality of pressing components 12 are arranged in a matrix, and each pressing component 12 includes a pressing member 121 and at least one set of elastic members 122;

[0079] Each set of elastic members 122 is configured to push the pressing member 121 away from the bracket 11, so that the pressing member 121 presses the battery string 100 to be welded below;

[0080] A plurality of relief openings 113 corresponding to the positions of each pressing member 121 are formed on the bracket 11, and the relief openings 113 allow the welding heat source located on the second side of the bracket 11 ( Figure 5 the upper side in ) to pass through and transfer heat to the pressing member 121;

[0081] The pressing member 121 is made of a heat-conducting material, and the pressing member 121 is configured to conduct the received heat to the contacted battery string 100, so that the solder tape 102 in the battery string 100 is welded and fixed to the battery cell 101.

[0082] The battery string 100 to be welded is pressed by a plurality of pressing components 12, the welding heat source passes through the bracket 11 through the relief openings 113 on the bracket 11 to irradiate and heat the pressing member 121, and the heat is transferred to the battery string assembly through the pressing member 121 made of a heat-conducting material to weld it, which can make full use of the heat of the welding heat source and improve the welding efficiency. The heat provided by the welding heat source is not directly provided to the battery string assembly, but the heat is transferred by means of a heat-conducting material, avoiding damage to the battery string assembly with a lower heat resistance than the heat-conducting material.

[0083] In one of the embodiments, optionally, the pressing member 121 is a long strip-shaped plate member, and the length direction of the pressing member 121 is the same as the length direction of the bracket 11.

[0084] The pressing member 121 is arranged as a long strip plate extending along the length direction of the bracket 11, which can make the relief opening 113 on the bracket 11 correspondingly longer, allowing more heat of the welding heat source to pass through, and further improving the welding efficiency. The length direction of the pressing member 121 is perpendicular to the length direction of the solder tape 102 of the lower battery string 100. Therefore, the pressing member 121 only partially contacts or is partially close to the solder tape 102, and the pressing member 121 does not heat the entire solder tape 102. Therefore, the solder tape 102 does not heat the part of the battery cell in contact with itself, avoiding warping of the battery cell due to uneven heating.

[0085] Optionally, a row of pressing assemblies 12 arranged along the width direction of the bracket 11 are used to jointly press at least two solder tapes 102.

[0086] In the prior art, the length direction of the pressing member is the same as the length direction of the solder tape. The length of the pressing member is slightly shorter than that of the solder tape, and the pressing member presses the solder tape along the length direction of the solder tape. The pressing member with this structure has the following disadvantages: 1. After long-term operation, if the spring is fatigued and damaged, it is easy to cause inconsistent elastic forces on both sides, resulting in a situation where one side of the pressing member is high and the other side is low, leading to the situation of virtual pressing of the solder tape and affecting the heat conduction efficiency of the pressing member; 2. Since the pressing member presses the entire solder tape in the same direction, the heat absorbed by the pressing member will be quickly transferred to the entire solder tape, causing the overall temperature of the solder tape to rise. And the pressing member is not in contact with the battery cell. Therefore, the temperature of the part of the battery cell in contact with the solder tape will be higher than other parts. And the solder tape basically spans the width direction of the battery cell. Therefore, there will be multiple linear parts with high temperature on the battery cell, resulting in the situation that the battery cell is prone to warping or curling; 3. The cross-section of the solder tape is a circular, triangular or flat and other various three-dimensional structures, and the width of the pressing member is generally much larger than the width of the solder tape itself. In addition, the pressing member is floatingly installed on the fixed plate. Therefore, when the pressing member presses the solder tape downward along the length direction of the solder tape, the pressing member may be deflected under the reaction force of the solder tape. When the deflected pressing member presses the solder tape downward, it may rub the solder tape, causing the solder tape to shift, and the soldered battery string will show a white exposed situation.

[0087] In the present application, the length direction of the pressing member 121 is perpendicular to the length direction of the welding tape 102, overcoming the disadvantages of the pressing members in the prior art: First, the pressing member 121 in the present application is relatively short, and each pressing member 121 is floatingly mounted on the fixing plate 112 through an elastic member 122, so the pressing member 121 is not easily stuck; Second, the pressing member 121 is in approximate point-to-point contact with the welding tape 102, and the pressing member 121 does not heat the entire welding tape 102, avoiding the warping of the battery chip caused by uneven heating of the battery chip 101 and the welding tape 102; Third, whether the pressing member 121 presses on the battery chip 101 or directly presses on the welding tape 102, it will not cause the welding tape 102 to skew. When the pressing member 121 directly presses on the welding tape 102, since the pressing member 121 presses on the upper surfaces of at least two welding tapes 102 at the same time, a plane will be formed on the upper surfaces of at least two welding tapes 102, and the pressure of the pressing member 121 will be borne at the same time. Therefore, the reaction forces of at least two welding tapes 102 will act on the pressing member 121 evenly and will not cause the pressing member 121 to skew.

[0088] In one of the embodiments, optionally, the edge of the lower pressing surface of the pressing member 121 is chamfered.

[0089] The edge of the lower pressing surface of the pressing member 121 is provided with a chamfer, which can prevent the edge of the lower pressing surface of the pressing member from scratching the battery chip 101.

[0090] Optionally, the bracket 11 includes a fixing plate 112 and two supports 111. A plurality of pressing assemblies 12 and a plurality of relief openings 113 are arranged on the fixing plate 112. The two supports 111 are respectively installed at both ends of the fixing plate 112 along its own length direction. The two supports 111 are used to support the fixing plate 112, and a receiving space for the lifting of the pressing assembly 12 is formed below the two supports 111 and the fixing plate 112 on the first side of the fixing plate 112.

[0091] The fixing plate 112 is supported by the two supports 111, and a receiving space is formed below the fixing plate 112, which can prevent the fixing plate 112 from interfering with the battery chip 101 or the welding tape 102. The weight of the fixing plate is borne by the two supports, and the weight of the entire pressing tooling will not be applied to the battery string assembly, avoiding the pressing tooling from pressing and damaging the battery chip.

[0092] In one of the embodiments, optionally, the two supports 111 are made of ferromagnetic material.

[0093] The support 111 is made of ferromagnetic material and can be directly adsorbed by magnetic force, which is convenient for the fixing and handling of the tooling.

[0094] Optionally, the outer lower ends of the two supports 111 are respectively recessed inward to form support steps, and the support steps have step surfaces.

[0095] The outer lower end of the support 111 is provided with a support step, which can prevent the pressing tool 10 from being directly placed on the battery cell 101, thus avoiding the risk of crushing the battery cell 101. There is a bearing mechanism on both sides of the conveyor line. The bearing end of the bearing mechanism cooperates with the step surface of the pressing tool 10 to bear the tool, and through rotation or lateral movement, the tool is gradually placed on the battery cell 101, which can avoid crushing the battery cell 101.

[0096] In one embodiment, optionally, each set of elastic members 122 includes a support rod 141, a spring 142 and a locking member 143. The first end of the support rod 141 is fixed on the pressing member 121, the second end of the support rod 141 is slidably installed on the bracket 11 and limited by the locking member 143, and the spring 142 is sleeved on the support rod 141 between the pressing member 121 and the bracket 11.

[0097] The spring 142 is installed between the pressing member 121 and the bracket 11. By the elastic force of the spring 142, the pressing member 121 is pressed against the battery string 100, which can make the pressing member 121 better fit the battery string 100.

[0098] In one embodiment, optionally, a boss 131 is arranged on the side of the pressing member 121 close to the bracket 11, and the first end of the support rod 141 is fixed on the boss 131.

[0099] The boss 131 is arranged on the pressing member 121, which can increase the local strength of the pressing member 121 and prevent the support rod 141 from damaging the pressing member 121 under the elastic force of the spring 142.

[0100] In one embodiment, optionally, each pressing assembly 12 includes two sets of elastic members 122, and the two sets of elastic members 122 are arranged at intervals along the length direction of the pressing member 121.

[0101] Each pressing assembly 12 presses against the pressing member 121 through two sets of elastic members 122, so that the pressing member 121 fits well with the battery string 100, and the situation that one side of the pressing member 121 is high and the other side is low will not occur, and the pressing member 121 is not easily stuck.

[0102] In one embodiment, optionally, each relief opening 113 extends along the length direction of the bracket 11.

[0103] The relief opening 113 is arranged to extend along the length direction of the bracket 11, which is consistent with the length direction of the pressing member 121, so as to maximize the transfer of the heat of the welding heat source to the pressing member 121 and improve the utilization rate of heat.

[0104] In one embodiment, optionally, the pressing member 121 is graphite, graphite copper foil, diamond, diamond aluminum, diamond copper, aluminum alloy, stainless steel, aluminum matrix composite, copper matrix composite, ceramic, alumina ceramic, zirconia ceramic, aluminum nitride ceramic, silicon carbide material or quartz.

[0105] The above materials have relatively high thermal conductivity, and the material of the pressing member 121 can be selected according to the actual situation, increasing the flexibility of material selection.

[0106] In one embodiment, optionally, at least two limiting grooves are formed on the lower pressing surface of the pressing member 121, and each limiting groove is for partially clamping a welding tape 102.

[0107] The limiting grooves provided on the lower pressing surface of the pressing member 121 can clamp the welding tape 102 therein, preventing the position of the welding tape 102 from moving.

[0108] In one embodiment, optionally, the cross-sectional shape of the limiting groove is triangular, semi-circular, square, U-shaped, trapezoidal or semi-elliptical.

[0109] The cross-sectional shape of the limiting groove can be selected according to the cross-sectional shape of the welding tape 102, which can better fix the welding tape 102.

[0110] As an optional implementation manner, as Figures 1 to 3 shown, optionally, the welding mechanism 30 includes a plurality of laser generators 33, and the plurality of laser generators 33 are arranged at intervals along the first direction 301. The length direction of the battery string to be welded is the same as the first direction 301, and each laser generator 33 provides heat to at least one pressing tool 10 located at the welding station 202. Specifically, the welding mechanism 30 shown in the figure includes three laser generators 33.

[0111] It should be noted that when the welding mechanism 30 adopts the method of releasing laser by the laser generator 33 and irradiating on the pressing tool 10, the light spot of the laser generator 33 irradiating on the pressing member 121 of the pressing tool 10 can be in the shape of a strip, a quadrilateral or a spot, etc. If the light spot is a strip, it can irradiate a row of pressing members 121 perpendicular to the first direction at one time. After heating a row of pressing members 121 perpendicular to the first direction, the laser generator 33 controls the light spot to move along the first direction to the next row of pressing members 121, so as to realize the heating of the heat conduction tool 10. If the light spot is a small light spot such as a quadrilateral or a spot, it can be as Figure 6 shown in the path, irradiate and heat a row of pressing members 121 in turn along the direction perpendicular to the first direction, then move down to the second row of pressing members 121 along the first direction, and then irradiate and heat each pressing member 121 in the second row in turn in the reverse direction, finally realizing the heating of the heat conduction tool 10. The respective working modes of the above laser generators 33 can be selected according to the actual production conditions.

[0112] The welding mechanism 30 is configured to include a plurality of laser generators 33, which can weld multiple groups of battery strings simultaneously, further improving the welding efficiency.

[0113] Optionally, the welding mechanism 30 further includes a first driving member 31, and a plurality of laser generators 33 are installed at intervals along a first direction 301 at the driving end of the first driving member 31. The first driving member 31 is configured to drive the plurality of laser generators 33 to synchronously slide along the first direction 301.

[0114] After the plurality of laser generators 33 provide heat to the pressing tooling 10 below, the first driving member 31 drives the plurality of laser generators 33 to move along the first direction 301 to other pressing tooling 10 that still need to be heated, so that the plurality of laser generators 33 can provide heat to other pressing tooling 10 that still need to be heated.

[0115] By configuring the first driving member 31 for the welding mechanism 30, the first driving member 31 can drive the laser generator 33 to move in the first direction 301, enabling the welding mechanism 30 to operate continuously.

[0116] Optionally, each laser generator 33 provides heat to two adjacent pressing tooling 10 in sequence.

[0117] Each laser generator 33 provides heat to two adjacent pressing tooling 10 in sequence, which can shorten the moving distance of the laser generator 33, save the welding preparation time, and improve the welding efficiency.

[0118] It should be noted that the number of pressing tooling 10 irradiated and heated by each laser generator 33 is mainly considered in relation to the duration of the welding process and the duration of other processes. On the premise that the duration of the welding process is not more than the duration of other processes, according to the time required for each laser generator 33 to irradiate and heat a single pressing tooling 10, the number of pressing tooling 10 that each laser generator 33 should heat during the welding process is determined, thereby determining the number of laser generators 33 that the welding mechanism 30 needs to be equipped with.

[0119] As an alternative embodiment, as Figure 3 shown, the conveying mechanism 20 includes a conveyor belt 21 and a driving assembly 22, where:

[0120] The driving assembly 22 is configured to drive the conveyor belt 21 to move. Along the first direction 301, a loading station 201, a welding station 202, and an unloading station 203 are sequentially arranged on the moving path of the conveyor belt 21.

[0121] The conveyor belt 21 is used to carry the battery strings to be welded and the pressing tooling 10 at the loading station 201, and convey the battery strings and the pressing tooling 10 to the welding station 202.

[0122] The conveyor belt 21 is also used to move the welded battery string from the welding station 202 to the blanking station 203.

[0123] The conveying mechanism 20 adopts a conveyor belt 21, which has a simple structure and low cost.

[0124] As another alternative embodiment, as Figure 1 、 Figure 2 shown, the conveying mechanism 20 includes a transmission platform 23 and a sliding assembly 24, wherein:

[0125] The sliding assembly 24 is configured to drive the transmission platform 23 to move, so that the transmission platform 23 sequentially passes through the loading station 201, the welding station 202 and the blanking station 203 along the first direction 301;

[0126] The transmission platform 23 is configured to carry the battery string to be welded and the pressing tool 10 at the loading station 201, and convey the battery string and the pressing tool 10 to the welding station 202;

[0127] The transmission platform 23 is also configured to move the welded battery string from the welding station 202 to the blanking station 203.

[0128] The conveying mechanism 20 adopts a transmission platform 23 with good rigidity, which can stably and accurately convey the battery string and the pressing tool 10.

[0129] In this embodiment, optionally, the conveying mechanism 20 includes two transmission platforms 23 (not shown in the figure) arranged at intervals along the second direction 302, and the second direction 302 is perpendicular to the first direction 301 in the horizontal plane;

[0130] The sliding assembly 24 is configured to drive the two transmission platforms 23 to move cyclically between the loading station 201, the welding station 202 and the blanking station 203 respectively.

[0131] The conveying mechanism 20 adopts two parallel transmission platforms 23, which can act alternately and save the preparation time for welding.

[0132] When the conveying mechanism 20 includes two transmission platforms 23 arranged at intervals along the second direction 302, the welding mechanism 30 includes a welding heat source (such as a laser generator 33) and a second driving member 32, wherein:

[0133] The welding station 202 includes a first station and a second station arranged at intervals along the second direction 302. The sliding assembly 24 is configured to drive the first transmission platform 23 to move cyclically between the loading station 201, the first station and the blanking station 203, and the sliding assembly 24 is also configured to drive the second transmission platform 23 to move cyclically between the loading station 201, the second station and the blanking station 203;

[0134] When the sliding component 24 drives the first transfer platform 23 to move to the first working station, the second driving member 32 is configured to drive the welding heat source to horizontally slide along the second direction 302 to directly above the first working station, and the welding heat source is configured to provide heat to a plurality of pressing tools 10 at the first working station;

[0135] When the sliding component 24 drives the second transfer platform 23 to move to the second working station, the second driving member 32 is further configured to drive the welding heat source to horizontally slide along the second direction 302 to directly above the second working station, and the welding heat source is further configured to provide heat to a plurality of pressing tools 10 at the second working station.

[0136] By configuring the second driving member 32, the welding mechanism 30 can be switched between two welding working stations 202, and the two welding working stations 202 can operate continuously, shortening the preparation and waiting time.

[0137] As Figure 1 、 Figure 2 shown, optionally, the conveying mechanism 20 includes two transfer platforms 23 arranged at intervals along the first direction 301, and the sliding component 24 is configured to reciprocally drive the two transfer platforms 23 to move between the loading working station 201 and the welding working station 202, and between the welding working station 202 and the unloading working station 203. At this time, the loading working station 201 and the unloading working station 203 respectively have the functions of loading and unloading.

[0138] The conveying mechanism 20 adopts two series-connected transfer platforms 23, which can act alternately, saving the preparation time for welding.

[0139] As an optional implementation manner, the string welding machine 1 further includes a battery cell supply mechanism, a solder tape group supply mechanism, and an unloading mechanism, where:

[0140] The bearing surface of the conveying mechanism 20 sequentially passes through the loading working station 201, the welding working station 202, and the unloading working station 203 along the first direction 301;

[0141] The solder tape group supply mechanism is used to place a plurality of solder tape groups on the bearing surface of the conveying mechanism 20 at the loading working station 201, and the battery cell supply mechanism is used to place a plurality of battery cells on the bearing surface of the conveying mechanism 20 at the loading working station 201, so that a plurality of battery cells and a plurality of solder tape groups form a battery string;

[0142] The conveying mechanism 20 is used to convey the battery string at the loading working station 201 to the welding working station 202, the conveying mechanism 20 is further used to convey the welded battery string at the welding working station 202 to the unloading working station 203, and the unloading mechanism is used to take away the welded battery string at the unloading working station 203.

[0143] By configuring the battery cell supply mechanism to supply battery cells, the solder tape group supply mechanism to supply solder tapes, and the blanking mechanism to blank the welded battery string, the whole process of battery string welding from loading to blanking can be automated, greatly improving the production efficiency.

[0144] As an alternative implementation, as Figure 4 shown, the string welding machine 1 includes a first handling component 41, a second handling component 42, and a conveyor line 50, where:

[0145] The conveyor line 50 is parallel to the conveying mechanism 20, and the conveyor line 50 is used to convey the pressing tool 10 in the direction opposite to the first direction 301;

[0146] The first handling component 41 is used to move the pressing tool 10 on the conveyor line 50 to the battery string to be welded on the conveying mechanism 20;

[0147] The second handling component 42 is used to move the pressing tool 10 on the welded battery string on the conveying mechanism 20 to the conveyor line 50.

[0148] By configuring the conveyor line 50 that runs in the opposite direction to the conveying mechanism 20, the recycling of the pressing tool 10 can be realized, and the utilization rate of the pressing tool 10 can be improved.

[0149] The conveyor belt 21, the driving component 22, the sliding component 24, the first driving member 31, the second driving member 32, the first handling component 41, the second handling component 42, and the conveyor line 50 in this application can all adopt any available structure in the prior art, which will not be elaborated here.

[0150] In addition, in order to realize the rapid recycling of the pressing tool 10, there are a total of three groups of pressing tools 10 on the four devices of the conveying mechanism 20, the first handling component 41, the second handling component 42, and the conveyor line 50 involved in the pressing tool 10. Each group of pressing tools 10 corresponds to a string of battery strings to ensure that each device can use the pressing tool 10 in time without waiting for the completion of other processes.

[0151] The working process of this application is as follows: The pressing tool 10 presses the battery string 100 on the conveying surface of the conveying mechanism 20, and the conveying mechanism 20 conveys the battery string 100 and the pressing tool 10 to the welding station 202. The welding mechanism 30 emits heat (such as laser) to heat the battery cell 101 and the solder tape 102 pressed by one pressing tool 10 respectively.

[0152] The welding heat moves along the Figure 6 path indicated by the arrow in, and sequentially heats the pressing member 121. After the pressing member 121 absorbs the heat, it quickly conducts to the contacted battery cell 101 or solder tape 102 to heat it, so that the battery cell 101 and the solder tape 102 are fixed together.

[0153] The above description of the present application is detailed enough and has a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The scope to be protected by the present application is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A string welding machine, characterized in that: The string welding machine comprises a conveying mechanism, a pressing tool and a welding mechanism, wherein: The conveying mechanism is configured to carry at least one group of battery strings to be welded arranged along a first direction, and a plurality of pressing fixtures are placed on each group of battery strings, and each pressing fixture is configured to press a group of stacked welding ribbon groups and battery cells in the battery string; The conveying mechanism is further configured to convey the battery string with the pressing tool placed thereon to the welding station along the first direction; The welding mechanism is installed above the welding station, and the welding mechanism is configured to provide heat to the pressing tool at the welding station; The pressing tool is configured to conduct the received heat to the stacked welding ribbon group and the battery cell that are pressed and contacted, so that the stacked welding ribbon group and the battery cell are welded and fixed.

2. The stringer according to claim 1, characterized in that: The clamping tool comprises a bracket and a plurality of clamping components installed on a first side of the bracket, wherein: A plurality of pressing components are arranged in a matrix, each of which comprises a pressing member and at least one group of elastic members; Each group of elastic members is configured to push the pressing member in a direction away from the bracket so that the pressing member presses the battery string to be welded below; The bracket is provided with a plurality of clearance openings corresponding to the position of each pressing member, wherein the clearance openings allow the welding heat source located on the second side of the bracket to pass through to transfer heat to the pressing member; The pressing member is made of a heat-conducting material and is configured to conduct the received heat to the contacting battery string so that the welding strips in the battery string are welded and fixed to the battery cells.

3. The stringer according to claim 2, characterized in that: A row of clamping components arranged along the width direction of the bracket is used to jointly clamp at least two welding strips, and the length direction of the clamping components is perpendicular to the length direction of the welding strip group.

4. The stringer according to claim 1, characterized in that: The welding mechanism includes a plurality of laser generators, which are arranged at intervals along a first direction. The length direction of the battery string to be welded is in the same direction as the first direction. Each laser generator provides heat to at least one pressing tool located at the welding station.

5. The stringer according to claim 4, characterized in that: The welding mechanism further includes a first driving member, a plurality of laser generators are installed at a driving end of the first driving member at intervals along the first direction, and the first driving member is configured to drive the plurality of laser generators to slide synchronously along the first direction; After the plurality of laser generators provide heat to the clamping tooling below, the first driving member drives the plurality of laser generators to move along the first direction to other clamping tooling that also needs to be heated, so that the plurality of laser generators provide heat to other clamping tooling that also needs to be heated.

6. The stringer according to claim 4 or 5, characterized in that: The laser generator provides heat to two adjacent pressing tools in sequence each time.

7. The stringer according to claim 4 or 5, characterized in that: The conveying mechanism comprises a conveyor belt and a driving assembly, wherein: The driving assembly is configured to drive the conveyor belt to move, and a loading station, the welding station and an unloading station are sequentially arranged along the first direction on the moving path of the conveyor belt; The conveyor belt is used to carry the battery string to be welded and the pressing tool at the loading station, and transport the battery string and the pressing tool to the welding station; The conveyor belt is also used to move the welded battery string from the welding station to the unloading station.

8. The stringer according to claim 1, characterized in that: The conveying mechanism includes a transmission platform and a sliding assembly, wherein: The sliding assembly is configured to drive the transmission platform to move so that the transmission platform passes through the loading station, the welding station and the unloading station in sequence along the first direction; The transport platform is configured to carry the battery string to be welded and the pressing tool at the loading station, and transport the battery string and the pressing tool to the welding station; The transport platform is further configured to move the welded battery string from the welding station to the unloading station.

9. The stringer according to claim 8, characterized in that: The conveying mechanism comprises two transmission platforms spaced apart along a second direction, wherein the second direction is perpendicular to the first direction in a horizontal plane; The sliding assembly is configured to respectively drive two transmission platforms to cyclically move between the loading station, the welding station and the unloading station.

10. The stringer according to claim 9, characterized in that: The welding mechanism comprises a welding heat source and a second driving member, wherein: The welding station comprises a first station and a second station arranged at intervals along a second direction, the sliding assembly is configured to drive the first transmission platform to cyclically move between the loading station, the first station and the unloading station, and the sliding assembly is further configured to drive the second transmission platform to cyclically move between the loading station, the second station and the unloading station; When the sliding assembly drives the first transmission platform to move to the first station, the second driving member is configured to drive the welding heat source to slide horizontally along the second direction to just above the first station, and the welding heat source is configured to provide heat to a plurality of pressing tools at the first station; When the sliding assembly drives the second transmission platform to move to the second workstation, the second driving member is also configured to drive the welding heat source to slide horizontally along the second direction to directly above the second workstation, and the welding heat source is also configured to provide heat to several clamping tools at the second workstation.

11. The stringer according to claim 1, characterized in that: The stringer also includes a battery cell supply mechanism, a welding ribbon group supply mechanism and a material unloading mechanism, wherein: The carrying surface of the conveying mechanism passes through the loading station, the welding station and the unloading station in sequence along the first direction; The welding ribbon group supply mechanism is used to place a plurality of welding ribbon groups on the carrying surface of the conveying mechanism located at the loading station, and the battery cell supply mechanism is used to place a plurality of battery cells on the carrying surface of the conveying mechanism located at the loading station, so that the plurality of battery cells and the plurality of welding ribbon groups form the battery string; The conveying mechanism is used to convey the battery string at the loading station to the welding station, and the conveying mechanism is also used to convey the welded battery string at the welding station to the unloading station, and the unloading mechanism is used to take away the welded battery string at the unloading station.

12. The stringer according to claim 1, characterized in that: The stringer comprises a first transport assembly, a second transport assembly and a conveyor line, wherein: The conveying line is parallel to the conveying mechanism, and the conveying line is used to convey the pressing tool in a direction opposite to the first direction; The first transport assembly is used to transport the pressing tool on the conveyor line to the battery string to be welded on the conveyor mechanism; The second transport assembly is used to transport the pressing tool on the battery string welded on the conveying mechanism to the conveying line.

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