Welding conveying device, battery stringing equipment and stringing method

Abstract

The invention provides a welding conveying device, battery stringing equipment and a stringing method.The welding conveying device comprises a base, a supporting plate, a driving roller set, a conveying belt and a cooling mechanism, the driving roller set is arranged on the base, and the conveying belt is connected to the driving roller set in a sleeving mode; the supporting plate is arranged on the seat body, the supporting plate is used for supporting the conveying surface of the conveying belt, the driving roller set is configured to drive the conveying belt to convey, and a battery piece laying station, a pressing tool laying station and a series connection station are sequentially arranged on the conveying belt in the conveying direction; and the cooling mechanism is configured to at least cool the battery piece laid to the battery piece laying station, so that the temperature of the battery piece is lower than the initial curing temperature of the thermosetting adhesive on the battery piece. According to the welding conveying device, the laid battery piece can be cooled, so that the temperature of the battery piece is lower than the initial curing temperature of the thermosetting adhesive on the battery piece, and the thermosetting adhesive on the battery piece is prevented from being cured before a pressing tool is placed.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic module production equipment, and specifically to a welding conveying device, a battery stringing device and a stringing method. Background Art

[0002] In the process of gluing and stringing cells, when the glue points applied to the cell strip laying path are thermosetting glue, the cell and the strip group are laid on the conveyor belt of the welding conveyor according to the stringing rules of the cell string, and the conveyor belt conveys the laid cell and the strip group to the heating mechanism, which heats the cell to solidify the glue points, thereby bonding the strip group to the cell through the solidified glue points to form a cell string. In order to prevent the strip from moving relative to the cell during the conveying process, during the laying process, the cell is first placed on the cell laying station on the conveyor belt, and then the cell is stepped to the presser laying station. After the strip group is laid, the presser is laid on the cell to press the strip group onto the cell.

[0003] Since the conveyor belt is cyclically transported, the conveyor belt is heated at the heating mechanism and then cyclically transported, resulting in a relatively high overall temperature of the conveyor belt. After the battery cells are placed on the battery cell laying station, the thermosetting adhesive on the battery cells is easily heated by the conveyor belt and solidifies to a certain extent, resulting in the soldering tape group being unable to fully engage with the glue points after the press is laid, thereby affecting the bonding effect of the subsequent glue points on the soldering tape. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a welding conveying device, and its technical solution is as follows:

[0005] A welding conveying device comprises a seat body, a support plate, a driving roller group, a conveying belt and a cooling mechanism, wherein:

[0006] The driving roller group is arranged on the base body, and the driving roller group at least comprises rollers arranged at both ends of the base body, and the conveyor belt is sleeved on the driving roller group;

[0007] The support plate is arranged on the seat body, and the support plate is used to support the conveying surface of the conveyor belt. The driving roller group is configured to drive the conveyor belt to convey. The conveyor belt is provided with a battery cell laying station, a press laying station and a serial connection station in sequence along the conveying direction;

[0008] The cooling mechanism is configured to cool down at least the battery cells laid at the battery cell laying station, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells.

[0009] The welding conveying device provided in the present application is provided with a cooling mechanism, which can cool the battery cells after laying, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells, thereby preventing the thermosetting adhesive on the battery cells from curing before the press is placed, and ultimately ensuring that after the press is laid, the welding ribbon group can be fully bonded with the glue point, thereby ensuring the quality of the string.

[0010] In some embodiments, the cooling mechanism is configured to cool the battery cells on the conveying path from the battery cell laying station to the press laying station so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells.

[0011] The battery cells laid at the battery cell laying station are continuously cooled during the transportation process, ensuring that the temperature of the battery cells is always lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed, thereby avoiding the thermosetting adhesive on the battery cells from curing before the press is placed.

[0012] In some embodiments, the return surface of the conveyor belt is located below and on the side of the support plate, and the cooling mechanism includes at least one first blowing member arranged on the outside and / or inside of the return surface of the conveyor belt, and the first blowing member is configured to blow air to cool the return surface of the conveyor belt.

[0013] By arranging a first blowing member on the outer side and / or inner side of the return surface of the conveyor belt, the return surface of the conveyor belt is cooled by blowing air, so that the temperature of the return surface of the conveyor belt is lower when it is circulated back to the battery cell laying station, thereby cooling the battery cells laid thereon, and ultimately ensuring that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed.

[0014] In some embodiments, the first blowing member includes a blowing block, an air cavity is provided in the blowing block, a blowing hole connected to the air cavity is provided on the blowing block, and an air connecting head connected to the air cavity is also provided on the blowing block, and the air connecting head is connected to a compressed air source; the compressed air output by the compressed air source enters the air cavity through the air connecting head, and is blown to the return surface of the conveyor belt through the blowing hole; or, the first blowing member is a fan, and the fan is configured to blow air toward the return surface of the conveyor belt.

[0015] Two first blowing members with simple structures are provided, both of which can implement blowing and cooling of the return surface of the conveyor belt.

[0016] In some embodiments, the cooling mechanism includes a second blowing member disposed above the battery cell laying station and / or the press laying station, and the second blowing member is configured to blow air to cool the battery cell.

[0017] By providing a second blowing member, direct blowing cooling of the battery cells located at the battery cell laying station and / or the press laying station is achieved, thereby improving the cooling effect and ensuring that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed.

[0018] In some embodiments, the temperature reduction mechanism includes a first cooling channel disposed in at least one roller in the driving roller set.

[0019] By setting a first cooling channel in at least one roller of the driving roller group, when the conveyor belt passes through the roller provided with the first cooling channel, the roller can cool the conveyor belt, thereby preventing the conveyor belt from having a thermal impact on the thermosetting adhesive on the battery cell before the press is placed.

[0020] In some embodiments, the support plate includes a first support plate and a second support plate arranged in sequence along the conveying direction of the conveyor belt, wherein the battery cell laying station and the press laying station are located above the first support plate, and the series connection station is located above the second support plate; the cooling mechanism includes a second cooling channel arranged in the first support plate, or the cooling mechanism includes a cooling plate arranged at the bottom of the first support plate and in contact with the first support plate; and / or the cooling mechanism includes an insulation plate arranged between the first support plate and the second support plate.

[0021] By setting the support plate as a disconnected first support plate and a second support plate, independent temperature control of the first support plate and the second support plate can be achieved, so that the first support plate maintains a relatively low temperature, so that the battery cells located at the battery cell laying station and the press laying station can be cooled, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells before the press is placed. The second support plate can be maintained at a relatively high temperature, so that the second support plate can cooperate with the series connection mechanism at the series connection station to heat and series connect the battery strings, so as to improve the series connection efficiency.

[0022] In some embodiments, the first support plate is provided with adsorption holes connected to the vacuum device, and the conveyor belt is provided with air holes. The vacuum device draws air from the air holes through the adsorption holes, so that the conveying surface of the conveyor belt located on the first support plate generates adsorption force.

[0023] The adsorption and positioning of the battery cells laid at the battery cell laying station is realized, and the battery cells are prevented from being misplaced during the process of being transported from the battery cell laying station to the press laying station.

[0024] In some embodiments, the first support plate includes a battery cell laying section and a press laying section arranged in sequence along the conveying direction of the conveyor belt, the battery cell laying station is located above the battery cell laying section, and the press laying station is located above the press laying section; the adsorption holes include a first adsorption hole and a second adsorption hole, the first adsorption hole is arranged on the battery cell laying section, and the second adsorption hole is arranged on the press laying section; the first support plate also includes a first air pumping block and a second air pumping block, wherein: the first air pumping block is arranged at the bottom of the battery cell laying section, and a first air pumping cavity connected to the first adsorption hole is arranged on the first air pumping block, and the first air pumping cavity is connected to the air pumping device, and the air pumping device pumps air to the first adsorption hole through the first air pumping cavity, so that the first adsorption hole generates an adsorption force; the second air pumping block is arranged at the bottom of the press laying section, and a second air pumping cavity connected to the second adsorption hole is arranged on the second air pumping block, and the second air pumping cavity is connected to the air pumping device, and the air pumping device pumps air to the second adsorption hole through the second air pumping cavity, so that the second adsorption hole generates an adsorption force.

[0025] By configuring the first support plate to include a battery cell laying section and a press laying section, and independently exhausting the adsorption holes on the battery cell laying section and the press laying section through the first and second air exhaust blocks, the uniformity and stability of the adsorption force of the conveyor belts at the battery cell laying station and the press laying station can be improved, thereby improving the adsorption effect of the conveyor belt on the battery cells.

[0026] In some embodiments, the first support plate also includes a first sealing plate and a second sealing plate, wherein: the first sealing plate sealing gasket is arranged between the battery cell laying section and the first vacuum block, and the first sealing plate is provided with a first through hole connecting the first adsorption hole and the first vacuum cavity; the second sealing plate sealing gasket is arranged between the press laying section and the second vacuum cavity, and the second sealing plate is provided with a second through hole connecting the second adsorption hole and the second vacuum cavity.

[0027] By setting the first sealing plate, the sealing performance of the contact between the battery cell laying section and the first air pumping block is improved, the air pumping effect of the first air pumping block on the first adsorption hole is ensured, and air leakage at the contact between the first air pumping block and the first adsorption hole is prevented, resulting in too small an adsorption force of the first adsorption hole. By setting the second sealing plate, the sealing performance of the contact between the press laying section and the second air pumping block is improved, the air pumping effect of the second air pumping block on the second adsorption hole is ensured, and air leakage at the contact between the press laying section and the second air pumping block is prevented, resulting in too small an adsorption force of the second adsorption hole.

[0028] In some embodiments, the second cooling channel is disposed in the battery cell laying section and avoids the first adsorption hole, and / or the second cooling channel is disposed in the press laying section and avoids the second adsorption hole.

[0029] By arranging the second cooling channel in the battery cell laying section and / or the press laying section, the first support plate can be cooled.

[0030] The present application also provides a battery stringing device, which includes the welding conveying device, battery cell laying mechanism, solder tape laying mechanism, press laying mechanism and serial connection mechanism described in any of the above items, wherein: the battery cell laying mechanism is configured to lay the battery cell to the battery cell laying station, the solder tape laying mechanism and the press laying mechanism are configured to lay the solder tape group and the press in sequence on the battery cell located at the press laying station, so that the press presses the solder tape group onto the battery cell; the welding conveying device is configured to convey the laid battery cell and solder tape group to the serial connection station; the serial connection mechanism is arranged at the serial connection station, and the serial connection mechanism is configured to heat the thermosetting adhesive on the battery cell, so that the thermosetting adhesive is cured to bond the solder tape group to the corresponding battery cell.

[0031] Through the cooperation of welding conveying device, battery cell laying mechanism, solder tape laying mechanism, press laying mechanism and serial connection mechanism, the battery stringing equipment realizes the automatic stringing of battery cells and ensures that the solder tape group can be fully engaged with the glue point, thereby ensuring the stringing quality.

[0032] The present application also provides a stringing method, which includes: laying the battery cells and the solder strip group on the conveying surface of the stringing conveying device according to a predetermined stringing rule, and providing a thermosetting adhesive on the battery cells; cooling the battery cells to be pressed before the press is laid, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive; laying the press on the battery cells to press the solder strip group on the battery cells; heating the battery cells after the press is laid to cure the thermosetting adhesive and bond the solder strip group to the battery cells.

[0033] The stringing method provided in the present application cools down the battery cells to be pressed before the press is laid, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive before the press is laid, ultimately ensuring that the welding ribbon group can be bonded to the battery cells after the press is laid, thereby ultimately ensuring the quality of the stringing.

[0034] In some embodiments, the battery cells to be pressed are cooled before the press is laid, including: blowing air toward the battery cells to cool the battery cells; and / or cooling the conveying surface of the serial conveying device located in front of the press laying position, and cooling the battery cells by the cooled conveying surface.

[0035] The laid battery cells can be cooled by directly blowing air to cool the battery cells, or by cooling the conveying surface of the conveyor belt and then indirectly cooling the battery cells by the cooled conveying surface, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells, thereby preventing the thermosetting adhesive on the battery cells from curing before the press is placed, and ultimately ensuring that the welding ribbon group can fully engage with the glue point after the press is laid, thereby ensuring the quality of the string. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a structural schematic diagram of a welding conveying device in an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of the welding conveying device in the embodiment of the present application after the conveying belt is omitted;

[0038] Figure 3 This is a schematic structural diagram of the first blowing member in the embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the three-dimensional structure of the first support plate in the embodiment of the present application;

[0040] Figure 5 This is a schematic diagram of the structure of the first support plate in the embodiment of the present application after the first air pumping block and the second air pumping block are omitted;

[0041] Figure 6 This is a schematic diagram of the structure of the first support plate in the embodiment of the present application after the first air pumping block, the second air pumping block, the first sealing plate and the second sealing plate are omitted;

[0042] Figure 7 This is a schematic diagram of the side structure of the first support plate in the embodiment of the present application;

[0043] Figure 8 for Figure 7 AA section view;

[0044] Fig. 9 for Figure 7 BB cross-sectional view.

[0045] Figures 1 to 9 Included:

[0046] First support plate 1:

[0047] The first supporting section 11: a first adsorption hole 111 and a first adsorption groove 112;

[0048] The second supporting section 12: a second adsorption hole 121, a second adsorption groove 122, and a second cooling channel 123;

[0049] First air pumping block 15: first air pumping cavity 151;

[0050] Second air pumping block 16: second air pumping cavity 161;

[0051] First sealing plate 17: first through hole 171;

[0052] Second sealing plate 18: second through hole 181;

[0053] A second supporting plate 2;

[0054] Driving roller group 3: active roller 31, driven roller 32, tensioning roller 33;

[0055] Conveyor belt 4;

[0056] The first blowing component 5 includes a blowing block 51, a blowing hole 52, and an air connection head 53;

[0057] Heat insulation board 6;

[0058] base 8;

[0059] Battery cell laying station A, press laying station B, and series connection station C. DETAILED DESCRIPTION

[0060] 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.

[0061] like Figure 1 to Figure 2 As shown, the welding conveying device in the embodiment of the present application includes a seat body 8, a support plate, a driving roller group 3, a conveying belt 4 and a cooling mechanism, wherein:

[0062] The driving roller group 3 is arranged on the base 8, and the driving roller group 3 at least includes rollers arranged at both ends of the base 8, and the conveyor belt 4 is sleeved on the driving roller group 3. For example, the rollers at both ends of the base 8 are respectively an active roller 31 arranged at one end of the base 8 and a driven roller 32 arranged at the other end of the base 8, and the driving roller group 3 may also include a tensioning roller 33, which can move along the conveying direction to tension the conveyor belt 4.

[0063] The support plate is arranged on the seat body 8, and the support plate is used to support the conveying surface of the conveyor belt 4. The driving roller group 3 is configured to drive the conveyor belt 4 for conveying. The battery cell laying station A, the press laying station B and the serial connection station C are arranged in sequence on the conveying direction of the conveyor belt 4.

[0064] The cooling mechanism is configured to cool down at least the battery cells laid at the battery cell laying station A, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells.

[0065] It can be seen that the welding conveying device in the embodiment of the present application is provided with a cooling mechanism, which can cool the battery cells after laying, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells, thereby preventing the thermosetting adhesive on the battery cells from curing before the press is placed, and ultimately ensuring that after the press is laid, the soldering tape group can be fully bonded with the glue point, thereby ensuring the quality of the string.

[0066] The press can adopt various existing structures of solder strip pressing tooling that can press the solder strip onto the battery cell. For example, the press includes a frame and several rows of pressing pins installed at the bottom of the frame, and each row of pressing pins is used to press a solder strip onto the battery cell.

[0067] Optionally, the cooling mechanism is configured to cool the battery cells on the conveying path from the battery cell laying station A to the press laying station B, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells. In other words, during the process of conveying the battery cells from the battery cell laying station A to the press laying station B, the cooling mechanism continuously cools the battery cells, thereby ensuring that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed.

[0068] Since the conveyor belt 4 is sleeved on the driving roller group 3, the conveyor belt 4 performs circular conveying under the drive of the driving roller group 3. The part of the conveyor belt 4 currently supported on the upper side of the support plate is the conveying surface of the conveyor belt, and the remaining parts of the conveyor belt 4 (i.e., the parts located below and on the sides of the support plate) are all return surfaces of the conveyor belt 4.

[0069] like Figure 1 As shown, in an optional embodiment, the cooling mechanism includes at least one first blowing member 5 arranged on the outer side of the return surface of the conveyor belt 4, and the first blowing member 5 is configured to blow air to cool the return surface of the conveyor belt 4. Of course, the first blowing member 5 can also be arranged on the inner side of the return surface of the conveyor belt 4. Alternatively, the first blowing member 5 is arranged on both the inner side and the outer side of the return surface of the conveyor belt 4.

[0070] By arranging a first blowing member 5 on the outer side and / or inner side of the return surface of the conveyor belt 4, the return surface of the conveyor belt 4 is cooled by blowing. In this way, when the return surface of the conveyor belt 4 is circulated back to the battery cell laying station A and switched to the conveying surface, the battery cells laid thereon can be cooled, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed.

[0071] like Figure 3 As shown, optionally, the first blowing member 5 includes a blowing block 51, an air cavity is provided in the blowing block 51, a blowing hole 52 connected to the air cavity is provided on the blowing block 51, and an air connection head 53 connected to the air cavity is also provided on the blowing block 51, and the air connection head 53 is connected to a compressed air source. The compressed air output by the compressed air source enters the air cavity through the air connection head 53, and is blown to the return surface of the conveyor belt 4 through the blowing hole 52. In order to extend the blowing length of the conveyor belt 4, optionally, the blowing block 51 is in the shape of a long strip, the length direction of the blowing block 51 is perpendicular to the conveying direction of the conveyor belt 4, and a plurality of blowing holes 51 are arranged at intervals along the length direction on the blowing block 51. Optionally, a plurality of first blowing members 5 are arranged at intervals along the length direction of the return surface.

[0072] Of course, the first blowing member 5 may also be a blowing device with other structures such as a fan that can blow air to cool the return surface of the conveyor belt 4 .

[0073] In another optional embodiment, the cooling mechanism includes a second blowing member disposed above the cell laying station A and / or the press laying station B, and the second blowing member is configured to blow air to cool the cell. In other words, the second blowing member directly blows air to cool the cell located at the cell laying station A and / or the press laying station B to ensure that the temperature of the cell is lower than the initial curing temperature of the thermosetting adhesive on the cell before the press is placed.

[0074] The second blowing member can be Figure 3 The first blowing member 5 shown has the same structure. Of course, the second blowing member can also be a blowing member with other structures such as a fan that can blow air to cool the battery cell.

[0075] In another optional embodiment, the cooling mechanism includes a first cooling channel disposed in at least one roller in the driving roller group 3. The inlet and outlet of the first cooling channel are connected to an external cooling fluid (cooling water, cooling oil, etc.) supply device, and the cooling fluid supply device and the first cooling channel form a circulating cooling loop. When the cooling fluid flows in the roller, the roller is cooled, thereby reducing the temperature of the roller.

[0076] When the conveyor belt 4 passes through the roller provided with the first cooling channel, the roller with a lower temperature can cool the conveyor belt 4, thereby preventing the conveyor belt 4 from having a thermal impact on the thermosetting adhesive on the battery cell before the press is placed.

[0077] like Figure 1 and Figure 2 As shown, optionally, the support plate includes a first support plate 1 and a second support plate 2 arranged in sequence along the conveying direction of the conveyor belt 4, wherein the battery cell laying station A and the press laying station B are located above the first support plate 1, and the series connection station C is located above the second support plate 2.

[0078] By configuring the support plate to consist of a first support plate 1 and a second support plate 2, independent temperature control of the first support plate 1 and the second support plate 2 can be achieved, so that the first support plate 1 maintains a relatively low temperature (for example, lower than the initial curing temperature of the thermosetting adhesive), so that the battery cells located at the battery cell laying station A and the press laying station B can be cooled, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells before the press is placed. The second support plate 2 maintains a relatively high temperature (for example, higher than the initial curing temperature of the thermosetting adhesive), so that the second support plate 2 can cooperate with the series connection mechanism at the series connection station C to heat and series connect the battery strings, so as to improve the series connection efficiency.

[0079] In order to keep the first support plate 1 at a relatively low temperature, the cooling mechanism may optionally include a second cooling channel disposed in the first support plate 1. The inlet and outlet of the second cooling channel are connected to an external cooling fluid (cooling water, cooling oil, etc.) supply device, and the cooling fluid supply device and the second cooling channel form a circulating cooling loop. When the cooling fluid flows in the second cooling channel, the first support plate 1 is cooled, thereby reducing the temperature of the first support plate 1. The first support plate 1 cools the battery cells at the battery cell laying station A and the press laying station B, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells before the press is placed.

[0080] In another optional embodiment, the cooling mechanism includes a cooling plate disposed at the bottom of the first support plate 1 and in contact with the first support plate 1, and the cooling plate cools the first support plate 1 to reduce the temperature of the first support plate 1. The cooling plate may be, for example, a metal plate having a third cooling channel or a refrigerator disposed therein.

[0081] like Figure 1 As shown, optionally, the cooling mechanism may further include a heat insulation plate 6 disposed between the first support plate 1 and the second support plate 2. The heat insulation plate 6 is made of a heat insulation material, which implements thermal isolation between the first support plate 1 and the second support plate 2, and prevents the heat on the second support plate 2 from being transferred to the first support plate 1, thereby maintaining the first support plate 1 at a relatively low temperature.

[0082] Optionally, the first support plate 1 is provided with adsorption holes connected to the air extraction device, and the conveyor belt 4 is provided with air holes, and the air extraction device extracts air from the air holes on the conveyor belt 4 through the adsorption holes on the first support plate 1, so that the conveying surface of the conveyor belt 4 located on the first support plate 1 generates adsorption force. In this way, the adsorption positioning of the battery cell laid at the battery cell laying station A can be achieved, and the battery cell can be prevented from being misplaced during the process of being conveyed from the battery cell laying station A to the press laying station B.

[0083] like Figures 4 to 9 As shown, optionally, the first support plate 1 includes a cell laying section 11 and a press laying section 12 sequentially arranged along the conveying direction of the conveyor belt 4, the cell laying station A is located above the cell laying section 11, and the press laying station B is located above the press laying section 12. The adsorption holes include a first adsorption hole 111 and a second adsorption hole 121, the first adsorption hole 111 is arranged on the cell laying section 11, and the second adsorption hole 121 is arranged on the press laying section 12.

[0084] The first support plate 1 further comprises a first air pumping block 15 and a second air pumping block 16, wherein:

[0085] The first air pumping block 15 is arranged at the bottom of the battery cell laying section 11. The first air pumping block 15 is provided with a first air pumping cavity 151 connected with the first adsorption hole 111. The first air pumping cavity 151 is connected with the air pumping device. The air pumping device pumps air into the first adsorption hole 111 through the first air pumping cavity 151 so that the first adsorption hole 111 generates adsorption force.

[0086] The second vacuum block 16 is arranged at the bottom of the press laying section 12, and a second vacuum cavity 161 connected to the second adsorption hole 121 is arranged on the second vacuum block 16. The second vacuum cavity 161 is connected to the vacuum device, and the vacuum device exhausts air from the second adsorption hole 121 through the second vacuum cavity 161 so that the second adsorption hole 121 generates adsorption force.

[0087] By configuring the first support plate 1 to include a battery cell laying section 11 and a press laying section 12, and independently exhausting the first adsorption holes 111 and the second adsorption holes 121 on the battery cell laying section 11 and the press laying section 12 through the first exhaust block 15 and the second exhaust block 16, the uniformity and stability of the adsorption force of the conveyor belts at the battery cell laying station A and the press laying station B can be improved, thereby improving the adsorption effect of the conveyor belt 4 on the battery cells.

[0088] like Figure 4 As shown, optionally, a plurality of first adsorption grooves 112 are arranged at intervals along a first direction (such as the X direction) on the upper surface of the battery cell laying section 11, the first adsorption grooves 112 extend along a second direction (such as the Y direction), a plurality of first adsorption holes 111 are arranged in the first adsorption grooves 112, and the second direction is perpendicular to the first direction. A plurality of second adsorption grooves 122 are arranged at intervals along the first direction on the upper surface of the press laying section 12, the second adsorption grooves 122 extend along the second direction, and a plurality of second adsorption holes 121 are arranged in the second adsorption grooves 122.

[0089] Figure 4 In the illustrated embodiment, the first direction is parallel to the length direction of the first support plate 1, and the second direction is parallel to the width direction of the first support plate 1. Of course, in other embodiments, the first direction may be parallel to the width direction of the first support plate 1, and the second direction may be parallel to the length direction of the first support plate 1.

[0090] By setting a plurality of first adsorption grooves 112 on the upper surface of the battery cell laying section 11 and arranging the first adsorption holes 111 in each first adsorption groove 112, the adsorption area of ​​the upper surface of the battery cell laying section 11 can be increased to enhance the adsorption effect of the conveyor belt 4 on the battery cell laying section 11 on the battery cell.

[0091] Similarly, by setting a second adsorption groove 122 on the upper surface of the press laying section 12 and arranging the second adsorption hole 121 in the second adsorption groove 122, the adsorption area of ​​the upper surface of the press laying section 12 can be increased, thereby improving the adsorption effect of the conveyor belt 4 on the press laying section 12 on the battery cell.

[0092] like Figure 5 As shown, optionally, the first support plate 1 further includes a first sealing plate 17 and a second sealing plate 18, wherein: the first sealing plate 17 is provided as a sealing gasket between the battery cell laying section 11 and the first air extraction block 15, and the first sealing plate 17 is provided with a first through hole 171 connecting the first adsorption hole 111 and the first air extraction cavity 151. The second sealing plate 18 is provided as a sealing gasket between the press laying section 12 and the second air extraction cavity 161, and the second sealing plate 18 is provided with a second through hole 181 connecting the second adsorption hole 121 and the second air extraction cavity 161.

[0093] By setting the first sealing plate 17, the sealing performance of the contact point between the battery cell laying section 11 and the first vacuum block 15 is improved, ensuring the vacuum effect of the first vacuum block 15 on the first adsorption hole 111, and preventing air leakage at the contact point between the battery cell laying section 11 and the first vacuum block 15, which would cause the adsorption force of the first adsorption hole 111 to be too small.

[0094] Similarly, by providing a second sealing plate 18, the sealing performance at the contact point between the press laying section 12 and the second vacuum block 16 is improved, thereby ensuring the vacuum effect of the second vacuum block 16 on the second adsorption hole 121 and preventing air leakage at the contact point between the press laying section 12 and the second vacuum block 16, which would cause the adsorption force of the second adsorption hole 121 to be too small.

[0095] like Figure 6 As shown, optionally, the second cooling channel 123 is arranged in the press laying section 12 and avoids the second adsorption hole 121, so that the cooling fluid flowing in the second cooling channel 123 can cool the press laying section 12. Since the press laying section 12 and the battery cell laying section 11 are integrally formed, the battery cell laying section 11 is also cooled.

[0096] Of course, the second cooling channel can also be arranged in the battery cell laying section 11 and avoid the first adsorption hole 111, so that the cooling fluid flowing in the second cooling channel can cool down the battery cell laying section 11. Similarly, since the press laying section 12 is integrally formed with the battery cell laying section 11, the press laying section 12 is also cooled down.

[0097] In order to further improve the cooling effect on the first support plate 1 , second cooling channels may be provided in both the battery cell laying section 11 and the press laying section 12 .

[0098] Based on the same inventive concept, the present application also provides a battery stringing device. The battery stringing device includes the welding conveying device provided in any of the above embodiments, and further includes a battery cell laying mechanism, a welding strip laying mechanism, a press laying mechanism and a series connection mechanism, wherein:

[0099] The cell laying mechanism is configured to lay the cell at the cell laying station A, and the solder tape laying mechanism and the press laying mechanism are configured to lay the solder tape group and the press in sequence on the cell located at the press laying station B, so that the press presses the solder tape group onto the cell.

[0100] The welding conveying device is configured to convey the laid-out battery cells and welding ribbon groups to the serial connection station C.

[0101] The serial connection mechanism is arranged at the serial connection station C, and is configured to heat the thermosetting adhesive on the battery cell, so that the thermosetting adhesive is cured and then the welding ribbon group is bonded to the corresponding battery cell.

[0102] It can be seen that through the cooperation of the welding conveying device, the battery cell laying mechanism, the solder tape laying mechanism, the press laying mechanism and the serial connection mechanism, the battery stringing equipment in the embodiment of the present application realizes the automatic stringing of the battery cells and ensures that the solder tape group can be fully engaged with the glue point to ensure the stringing quality.

[0103] Among them, the battery cell laying mechanism, the welding tape laying mechanism, and the press laying mechanism can adopt any existing structure as long as it can realize the transportation and laying of the battery cells, welding tapes and presses.

[0104] Optionally, the series connection mechanism is a heating light box to heat the thermosetting adhesive on the battery cell to solidify it.

[0105] Based on the same inventive concept, an embodiment of the present application also provides a stringing method, which includes: laying the battery cells and solder strip groups on the conveying surface of the stringing conveying device according to a predetermined stringing rule, and providing a thermosetting adhesive on the battery cells; cooling the battery cells to be pressed before the press is laid, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive; laying the press on the battery cells to press the solder strip group on the battery cells; heating the battery cells after the press is laid to cure the thermosetting adhesive, and bonding the solder strip group to the battery cells.

[0106] It can be seen that the stringing method provided in the embodiment of the present application cools the battery cells to be pressed before the press is laid, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive before the press is laid, ultimately ensuring that the solder tape group can be bonded to the battery cells after the press is laid, thereby ultimately ensuring the quality of the stringing.

[0107] Optionally, the battery cells to be pressed are cooled before the press is laid, including: blowing air toward the battery cells to cool them; and / or cooling the conveying surface of the serial conveying device located in front of the press laying position, and cooling the battery cells by the cooled conveying surface.

[0108] The laid battery cells can be cooled by directly blowing air to cool the battery cells, or by cooling the conveying surface of the conveyor belt and then indirectly cooling the battery cells by the cooled conveying surface, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells, thereby preventing the thermosetting adhesive on the battery cells from curing before the press is placed, and ultimately ensuring that the welding ribbon group can fully engage with the glue point after the press is laid, thereby ensuring the quality of the string.

[0109] The stringing method in the embodiment of the present application can be implemented by the battery stringing device in the embodiment of the present application.

[0110] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand 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, not by the above description in the embodiments. Moreover, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A welding conveying device, characterized in that: The welding conveying device comprises a seat body, a support plate, a driving roller group, a conveying belt and a cooling mechanism, wherein: The driving roller group is arranged on the base body, and the driving roller group at least comprises rollers arranged at both ends of the base body, and the conveyor belt is sleeved on the driving roller group; The support plate is arranged on the seat body, and the support plate is used to support the conveying surface of the conveyor belt. The driving roller group is configured to drive the conveyor belt to convey. The conveyor belt is provided with a battery cell laying station, a press laying station and a serial connection station in sequence along the conveying direction; The cooling mechanism is configured to cool down at least the battery cells laid at the battery cell laying station, so that the temperature of the battery cells is lower than the initial curing temperature of the thermosetting adhesive on the battery cells.

2. The welding conveying device according to claim 1, characterized in that: The cooling mechanism is configured to cool the battery cells on the conveying path from the battery cell laying station to the press laying station, so that the temperature of the battery cells is lower than the starting curing temperature of the thermosetting adhesive on the battery cells.

3. The welding conveying device according to claim 1, characterized in that: The return surface of the conveyor belt is located below and on the side of the support plate, and the cooling mechanism includes at least one first blowing member arranged on the outside and / or inside of the return surface of the conveyor belt, and the first blowing member is configured to perform air blowing cooling on the return surface of the conveyor belt.

4. The welding conveying device according to claim 3, characterized in that: The first blowing member comprises a blowing block, an air cavity is arranged in the blowing block, a blowing hole connected to the air cavity is arranged on the blowing block, an air connection head connected to the air cavity is also arranged on the blowing block, and the air connection head is connected to a compressed air source; the compressed air output by the compressed air source enters the air cavity through the air connection head and is blown to the return surface of the conveyor belt through the blowing hole; or, The first blowing member is a fan, and the fan is configured to blow air toward the return surface of the conveyor belt.

5. The welding conveying device according to claim 1, characterized in that: The cooling mechanism comprises a second blowing member disposed above the battery cell laying station and / or the press laying station, and the second blowing member is configured to perform air blowing cooling on the battery cell.

6. The welding conveying device according to claim 1, characterized in that: The temperature reduction mechanism includes a first cooling channel arranged in at least one roller in the driving roller group.

7. The welding conveying device according to claim 1, characterized in that: The support plate comprises a first support plate and a second support plate sequentially arranged along the conveying direction of the conveyor belt, wherein the cell laying station and the press laying station are located above the first support plate, and the serial connection station is located above the second support plate; The cooling mechanism includes a second cooling channel arranged in the first support plate, or the cooling mechanism includes a cooling plate arranged at the bottom of the first support plate and in contact with the first support plate; And / or, the cooling mechanism includes a heat insulation plate arranged between the first support plate and the second support plate.

8. The welding conveying device according to claim 7, characterized in that: The first support plate is provided with an adsorption hole connected to the air extraction device, and the conveyor belt is provided with an air vent. The air extraction device extracts air from the air vent through the adsorption hole, so that the conveying surface of the conveyor belt located on the first support plate generates an adsorption force.

9. The welding conveying device according to claim 8, characterized in that: The first support plate comprises a cell laying section and a press laying section sequentially arranged along the conveying direction of the conveyor belt, the cell laying station is located above the cell laying section, and the press laying station is located above the press laying section; The adsorption holes include a first adsorption hole and a second adsorption hole, the first adsorption hole is arranged on the battery sheet laying section, and the second adsorption hole is arranged on the press laying section; The first support plate further comprises a first air pumping block and a second air pumping block, wherein: The first air extraction block is arranged at the bottom of the battery sheet laying section, and the first air extraction block is provided with a first air extraction cavity connected with the first adsorption hole, and the first air extraction cavity is connected with the air extraction device, and the air extraction device extracts air from the first adsorption hole through the first air extraction cavity, so that the first adsorption hole generates adsorption force; The second vacuum block is arranged at the bottom of the press laying section, and a second vacuum cavity connected to the second adsorption hole is arranged on the second vacuum block. The second vacuum cavity is connected to the vacuum device, and the vacuum device evacuates the second adsorption hole through the second vacuum cavity so that the second adsorption hole generates adsorption force.

10. The welding conveying device according to claim 9, characterized in that: The first support plate further comprises a first sealing plate and a second sealing plate, wherein: The first sealing plate sealing gasket is arranged between the battery sheet laying section and the first air extraction block, and the first sealing plate is provided with a first through hole connecting the first adsorption hole and the first air extraction cavity; The second sealing plate sealing pad is arranged between the press laying section and the second air pumping cavity, and the second sealing plate is provided with a second through hole connecting the second adsorption hole and the second air pumping cavity.

11. The welding conveying device according to claim 9, characterized in that: The second cooling channel is arranged in the battery cell laying section and avoids the first adsorption hole, and / or the second cooling channel is arranged in the press laying section and avoids the second adsorption hole.

12. A battery string device, characterized in that: The battery stringing equipment comprises a welding conveying device, a battery sheet laying mechanism, a welding strip laying mechanism, a press laying mechanism and a stringing mechanism as claimed in any one of claims 1 to 11, wherein: The cell laying mechanism is configured to lay the cell at the cell laying station, and the soldering tape laying mechanism and the press laying mechanism are configured to lay the soldering tape group and the press in sequence on the cell located at the press laying station, so that the press presses the soldering tape group onto the cell; The welding conveying device is configured to convey the laid-out battery cells and welding ribbon groups to the serial connection station; The serial connection mechanism is arranged at the serial connection station, and is configured to heat the thermosetting adhesive on the battery cell, so that the thermosetting adhesive is solidified to bond the welding ribbon group to the corresponding battery cell.

13. A stringing method, characterized in that: The string forming method comprises: Laying the battery sheets and the welding ribbon group on the conveying surface of the stringing conveying device according to a predetermined stringing rule, wherein the battery sheets are provided with thermosetting glue; Cooling the battery cell to be pressed before the press is laid, so that the temperature of the battery cell is lower than the initial curing temperature of the thermosetting adhesive; Laying a press onto the battery cell to press the welding ribbon group on the battery cell; After the press is laid, the battery cell is heated to solidify the thermosetting adhesive, and the soldering ribbon group is bonded to the battery cell.

14. The string forming method according to claim 13, characterized in that: The step of cooling the battery cells to be pressed before the press is laid comprises: Blowing air toward the battery cell to cool the battery cell; and / or, The conveying surface of the serial conveying device located in front of the press laying position is cooled, and the battery cells are cooled by the cooled conveying surface.

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