Welding assembly and battery string welding device

Abstract

The utility model discloses a welding assembly and a battery string welding device, the welding assembly comprises a heating unit for heating a to-be-welded piece and further comprises an intervention welding jig, the intervention welding jig is arranged between the heating unit and the to-be-welded piece so as to shield part of heat heated by the heating unit, and the intervention welding jig is used for welding the to-be-welded piece. The to-be-welded part is placed on the surface of the bearing table, and the intervention welding jig can move relative to the to-be-welded part so that the position of the intervention welding jig on the to-be-welded part can be kept unchanged. According to the welding assembly, the intervention welding jig is arranged between the heating unit and the to-be-welded parts, so that the structure at the gap of the adjacent to-be-welded parts cannot be heated by the heating unit, and the structure between the to-be-welded parts is prevented from being damaged. In the field of battery string welding, the welding intervention jig can protect a welding strip between adjacent battery pieces from being heated by high temperature, and the welding strip at the position is effectively prevented from being deformed or warped due to high temperature.

Description

Technical Field

[0001] The present application relates to the technical field of battery string welding, and in particular to a welding assembly and a battery string welding device. Background Art

[0002] In the field of photovoltaic technology, in the related technology of welding battery cells and welding ribbons into battery strings, or fixing welding ribbons on battery cells with adhesive films and then heating and welding them to form battery strings, when laying battery cells, the battery cells are laid one by one on the battery cell conveyor belt, and there are two types of spacing between adjacent battery cells, one is the conventional cell spacing, and the other is the sub-string spacing. The conventional cell spacing refers to the preset spacing between adjacent battery cells in a battery string, and the value is generally small, or it is a negative spacing; the sub-string spacing refers to the preset spacing between adjacent battery strings, that is, the so-called string spacing, and the length of the welding ribbon at the string spacing ranges from 10-40mm.

[0003] During welding, the laid-out battery string to be welded is heated multiple times to securely connect the soldering ribbon to the battery cell. When it comes to the string spacing, this part of the soldering ribbon does not need to be connected to the battery cell. Multiple high-temperature heating causes the soldering ribbon to deform or warp after welding. When the temperature is too high, the solder on the soldering ribbon at that position may peel off. In addition, after high-temperature welding is completed and the ribbon is cut off from the string spacing, the end of the soldering ribbon at the string spacing will warp, seriously affecting the subsequent welding of the busbar and further affecting the quality of the string making. Utility Model Content

[0004] The embodiments of the utility model provide a welding assembly and a battery string welding device, which can solve the problems in the above-mentioned prior art.

[0005] In the first aspect, the utility model provides a welding assembly, including a heating unit for heating a workpiece to be welded, and also including an interference welding jig, wherein the interference welding jig is arranged between the heating unit and the workpiece to be welded to block part of the heat heated by the heating unit, and the workpiece to be welded is placed on the surface of a receiving platform; the interference welding jig can move relative to the workpiece to be welded to maintain an unchanged position on the workpiece to be welded.

[0006] Optionally, the interference welding jig includes a baffle, a mounting seat, and a driving device, wherein the baffle is arranged between the heating unit and the workpiece to be welded to shield a local area of ​​the workpiece to be welded; the baffle is detachably connected to the mounting seat, and the driving device drives the mounting seat to drive the interference welding jig to move.

[0007] Optionally, the driving device controls the baffle to move synchronously with the workpiece to be welded; and the orthographic projection of the baffle of the interference welding fixture covers the gap space between two specific workpieces to be welded.

[0008] Optionally, the intervention welding jig further includes a reinforcing plate, and the reinforcing plate is welded or riveted to the baffle.

[0009] Optionally, the baffle is made of stainless steel or other light-proof and temperature-resistant materials.

[0010] Optionally, the mounting seats include two, and are respectively arranged on two opposite sides of the position of the parts to be welded, and the two ends of the baffle are respectively connected to the two mounting seats.

[0011] Optionally, a heat dissipation unit may be further included, wherein the heat dissipation unit is arranged on the heating unit to cool the heating unit.

[0012] In the second aspect, the utility model provides a battery string welding device, which includes any of the aforementioned welding assemblies, and also includes: a receiving platform, a conveyor mesh belt, and a press, the conveyor mesh belt is sleeved with the receiving platform, the press is used to be placed on the upper surface of the battery string to be welded, the battery string to be welded is laid on the conveyor mesh belt and moved by the conveyor mesh belt; the battery string to be welded includes a plurality of battery cells and welding strips connecting the battery cells, the intervention welding jig is used to be placed above the spacing between some adjacent battery strings, and the intervention welding jig moves with the battery string.

[0013] Optionally, the receiving platform includes a horizontal section and a vertical section, and a plurality of wheels, and the wheels between the horizontal section and the vertical section are used to absorb the back film.

[0014] Optionally, the battery string welding device further comprises a string laying mechanism, which is used to simultaneously grab the battery cells, welding strips and positive film and lay them on the back film on the receiving platform.

[0015] Optionally, the heating unit includes a heating source, an outer cover and a heat insulation plate, the heat insulation plate is attached to the outer cover, the heating source is arranged inside the outer cover, and the heat dissipation holes on the top surface of the outer cover are connected to the heat dissipation unit.

[0016] Optionally, the interference welding jig is connected to the bracket, or connected to the fixing piece of the heating unit.

[0017] The beneficial effects of the utility model are:

[0018] In the welding assembly of the utility model, an interference welding jig is arranged between the heating unit and the workpiece to be welded, so that the structure at the gap between the adjacent workpieces to be welded will not be heated by the heating unit; when the workpieces to be welded are heated and welded during movement, the interference welding jig moves with the workpieces to be welded to maintain the position above the workpieces to be welded unchanged, thereby avoiding damage to the structure between the workpieces to be welded. Applied in the field of battery string welding, the interference welding jig can protect the welding strips between adjacent battery cells from being heated by high temperatures, effectively avoiding deformation or warping thereof.

[0019] In addition, the utility model also provides a battery string welding device, which is designed to automatically weld battery strings based on the aforementioned welding assembly, and the welding strips at the string spacing position will not be damaged by the heated welding head, or the ends of the welding strips will not be warped after being deformed by heat, thereby improving the quality of the welded battery strings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram showing an application device of a welding assembly provided in an embodiment of the present application;

[0021] Figure 2 A three-dimensional schematic diagram showing a welding assembly provided in an embodiment of the present application;

[0022] Figure 3 express Figure 2 The enlarged schematic diagram of point A in the middle;

[0023] Figure 4 Another structural schematic diagram of the welding assembly in this application is shown.

[0024] Reference numerals:

[0025] 1: Intervention welding fixture; 11: Baffle; 12: Mounting seat; 13: Conveyor belt; 14: Driving device; 15: Reinforcement plate; 2: Receiving platform; 21: Horizontal section; 22: Vertical section; 23: Wheel; 3: Conveyor mesh belt. DETAILED DESCRIPTION

[0026] The technical solutions in the application embodiments will be described clearly and completely below in conjunction with the accompanying drawings in the application embodiments. In addition, the phrases "in one embodiment" or "in an embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics may be combined in one or more embodiments in any suitable manner.

[0027] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0028] Reference Figures 1 to 4 As shown, an embodiment of the utility model provides a welding assembly and a battery string welding device.

[0029] In the first aspect, the utility model provides a welding assembly, including a heating unit for heating a workpiece to be welded, and also including an intervention welding jig 1, wherein the intervention welding jig 1 is used between the heating unit and the workpiece to be welded to shield part of the heat heated by the heating unit, and the workpiece to be welded is placed on the surface of a receiving table 2; the intervention welding jig 1 can move relative to the workpiece to be welded to maintain an unchanged position above the workpiece to be welded.

[0030] In the welding assembly of the utility model, an interference welding jig 1 is arranged between the heating unit and the parts to be welded, so that the structure at the gap between the adjacent parts to be welded will not be heated by the heating unit; when the parts to be welded are heated and welded during movement, the interference welding jig 1 moves with the parts to be welded to maintain the position above the parts to be welded unchanged, avoiding damage to the structure between the parts to be welded. Applied in the field of battery string welding, the interference welding jig 1 can protect the welding strips between adjacent battery cells from being heated by high temperatures, effectively avoiding deformation or warping thereof.

[0031] Specifically, Figure 2 As shown, the aforementioned interference welding jig 1 includes a baffle 11, a mounting seat 12, and a driving device 14. The baffle 11 is arranged between the heating unit and the workpiece to be welded to shield a local area of ​​the workpiece to be welded; the baffle 11 and the mounting seat 12 are detachably connected, and the driving device 14 drives the mounting seat 12 to drive the interference welding jig 1 to move.

[0032] It can be implemented that the aforementioned driving device 14 can be a motor-controlled conveyor belt 13, or a cylinder, etc.

[0033] like Figure 1As shown, the baffle 11 is extended along the gap direction of the parts to be welded, the width of the baffle 11 matches the spacing between adjacent parts to be welded, and the baffle 11 is parallel to the parts to be welded, and the baffle 11 is used to absorb or reflect the heat applied by the heating unit to the area of ​​the parts to be welded. The movable intervention welding fixture 1 can take into account the welding conditions of the parts to be welded during the movement process. For example, when welding a battery string, the battery cells are laid out into a battery string to be welded. Therefore, when welding, after the battery string to be welded enters the welding assembly, the heating unit heats each battery cell according to the "on and off" light signal set in a cycle; the intervention welding fixture 1 is above the battery cell spacing, or above the battery string spacing, blocking the infrared light at this position, thereby preventing the welding strip at the spacing from being heated.

[0034] As mentioned above, the baffle 11 is disposed between two adjacent parts to be welded, so that the orthographic projection of the baffle 11 coincides with the gap between the two parts to be welded. The "two adjacent parts to be welded" can be between any two adjacent parts to be welded, or between two adjacent parts to be welded separated by a number of parts to be welded. In the battery string welding application, the position of the baffle 11 can be above the spacing between adjacent sheets, or the spacing between adjacent battery strings composed of multiple battery strings, which can be selected based on the size adaptability of the actual battery string sheet spacing.

[0035] In some embodiments, Figure 3 As shown, the interference welding fixture 1 also includes a reinforcing plate 15, which is welded or riveted to the baffle 11. When one end of the baffle 11 is connected to the mounting seat 12 and the other end is free, the baffle 11 may bend or deform during movement or after being heated. Under such conditions, the reinforcing plate 15 is provided on the baffle 11 to increase the tolerance of the baffle 11 and prevent it from shaking. The reinforcing plate 15 can be directly welded to the baffle 11, or the reinforcing plate 15 can be riveted to the baffle 11 using mortise and tenon technology. The specific selection can be made according to the actual use environment, spatial position, and the convenience of assembly. This embodiment does not make specific limitations on this.

[0036] In some embodiments, Figure 4 As shown, two mounting seats 12 connected to the baffle plate 11 can also be provided, and they are respectively provided on two opposite sides of the position of the to-be-welded parts, and the two ends of the baffle plate 11 are respectively connected to the two mounting seats 12. In this embodiment, it is equivalent to setting the baffle plate 11 at both ends of the to-be-welded parts, and this structure can not only stabilize the baffle plate 11, but also facilitate movement.

[0037] In addition, the aforementioned baffle 11 is used to block the heat of the heating unit. Therefore, the baffle 11 needs to be set to a temperature-resistant material. When the heating unit is infrared heating, the baffle 11 also needs to have a light-proof property. The reflective material can be appropriately selected so that the light at the sheet spacing or string spacing is reflected to the position of the battery sheet to improve the quality of the battery string welding.

[0038] In the second aspect, the utility model provides a battery string welding device, which includes any of the aforementioned welding components, and also includes: a conveyor mesh belt 3, a press, the conveyor mesh belt 3 is sleeved with the receiving platform 2, the press is used to be placed on the upper surface of the battery string to be welded, the battery string to be welded is laid on the conveyor mesh belt 3 and is moved by the conveyor mesh belt 3; the battery string to be welded includes a plurality of battery cells and welding strips connecting the battery cells, the intervention welding jig 1 is used to be placed above the spacing between some adjacent battery cells, and the intervention welding jig 1 moves with the battery string.

[0039] As mentioned above, the utility model also provides a battery string welding device, which is designed on the basis of the aforementioned welding assembly to automatically weld battery strings, and the welding strips at the string spacing position will not be damaged by the heated welding head, or the ends of the welding strips will not be warped after being deformed by heat, thereby improving the quality of the welded battery strings.

[0040] like Figure 1 As shown, the battery string welded by the battery string welding device provided by the utility model can be a battery string in which the welding strip shown on the left side of the figure is welded to one side of the battery cell, that is, it is welded to the grid line on the surface of the battery cell; it can also be a battery string in which both the front and back sides of the battery cell include welding strips, that is, the welding strips are welded to the grid lines on the front and back sides of the battery cell; it can also be the aforementioned single-sided welding strip or double-sided welding strip, but it is a film-covered battery string in which the welding strip is fixed to the surface of the battery cell with a film.

[0041] For the aforementioned battery string, the conveyor mesh belt 3 is used to receive and lay the battery string during use. The string laying process is:

[0042] Lay the back film, solder tape, battery cells, solder tape, and front film;

[0043] Or, lay the battery cells and solder strips;

[0044] Or, lay the battery cells, lay the solder tape, and lay the positive film;

[0045] Or, lay the solder tape, lay the battery cells, lay the solder tape;

[0046] When laying the strings, the receiving table 2 serves as the plane for laying the strings, and the conveyor mesh belt 3 can be used to transfer the back film to the laying position, and then the string laying mechanism is used to move the battery cells, welding ribbons, positive film and press to the laying position, and the laying of the battery string to be welded is completed in one cycle. After passing through the aforementioned welding assembly, the welding ribbons at the string spacing and / or cell spacing are not heated by the high temperature of the infrared welding head, thereby avoiding bending, deformation or warping of the welding ribbons.

[0047] In some embodiments, the aforementioned receiving platform 2 may include a horizontal section 21 and a vertical section 22, as well as a plurality of rollers 23, and the rollers 23 between the horizontal section 21 and the vertical section 22 are used to absorb the back film. By setting the vertical section 22 and the horizontal section 21, the transmission of the back film can be separated from the pulling and laying of the welding tape, so that the film is transmitted from the vertical section 22 to the horizontal section 21, and the welding tape is directly pulled to the end of the horizontal section 21. Of course, it can also be a horizontal section 21 and an inclined section, that is, the angle between the two sections is greater than 90°, rather than 90°, which can be selected according to the actual form of welding tape transmission adaptability, and this embodiment does not make specific limitations on this.

[0048] The aforementioned string laying mechanism is used to simultaneously grab the battery cell, solder strip and positive film and lay them on the back film on the receiving platform 2, and can also be used to simultaneously grab the solder strip and press and lay them on the battery cell.

[0049] The aforementioned heating unit may include a heating source, an outer cover and a heat insulation board, wherein the heat insulation board is attached to the outer cover, and the heating source is arranged inside the outer cover, wherein the heating source may be an infrared lamp tube, and the front film and the back film are heated and attached to the surface of the battery cell by irradiating infrared light to the battery string. In addition, in order to prevent the heating source from overheating, a heat dissipation unit may be arranged above the heating source, and the heat dissipation hole on the top surface of the outer cover is connected to the heat dissipation unit to cool down the heating source in the outer cover, and the heat dissipation unit may be a fan or other heat dissipation device, and this embodiment does not make specific limitations on this.

[0050] In addition, the interference welding jig 1 is connected to the bracket, or connected to the fixing part of the heating unit. That is, the battery string welding device in this embodiment includes a bracket for fixing various structures and a fixing part for fixing the heating unit. The fixing part of the interference welding jig 1 can be connected to the aforementioned bracket, or connected to the fixing part of the heating unit. It only needs to meet the requirement that the baffle 11 can move synchronously with the battery string to be heated. This embodiment does not make specific limitations on this.

[0051] Finally, the utility model discloses a welding assembly and a battery string welding device, wherein the welding assembly includes a heating unit for heating the workpiece to be welded, and also includes an interference welding jig 1, wherein the interference welding jig 1 is arranged between the heating unit and the workpiece to be welded to shield part of the heat heated by the heating unit, and the workpiece to be welded is placed on the surface of a receiving table 2, and the interference welding jig 1 can move relative to the workpiece to be welded to maintain an unchanged position above the workpiece to be welded. In the welding assembly of the utility model, the interference welding jig 1 is arranged between the heating unit and the workpiece to be welded, so that the structure at the gap between adjacent workpieces to be welded will not be heated by the heating unit, thereby avoiding damage to the structure between the workpieces to be welded. In the field of battery string welding, the interference welding jig 1 can protect the welding strips between adjacent battery cells from being heated by high temperature, and effectively avoid deformation or warping of the welding strips at this position due to high temperature.

[0052] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A welding assembly, comprising a heating unit for heating a workpiece to be welded, characterized in that: It also includes an interference welding jig (1), which is used between the heating unit and the workpiece to be welded to shield part of the heat heated by the heating unit. The workpiece to be welded is placed on the surface of a receiving platform (2); the interference welding jig (1) can move relative to the workpiece to be welded to maintain an unchanged position on the workpiece to be welded.

2. The welding assembly according to claim 1, characterized in that: The interference welding jig (1) comprises a baffle (11), a mounting seat (12), and a driving device (14); the baffle (11) is arranged between the heating unit and the workpiece to be welded so as to shield a local area of ​​the workpiece to be welded; the baffle (11) and the mounting seat (12) are detachably connected; and the driving device (14) drives the mounting seat (12) to drive the interference welding jig (1) to move.

3. The welding assembly according to claim 2, characterized in that: The driving device (14) controls the baffle (11) to move synchronously with the workpiece to be welded; the orthographic projection of the baffle (11) of the interference welding jig (1) covers the gap space between two specific workpieces to be welded.

4. The welding assembly according to claim 2, characterized in that: The interference welding jig (1) further comprises a reinforcing plate (15), wherein the reinforcing plate (15) is welded or riveted to the baffle plate (11); and the two ends of the baffle plate (11) are respectively connected to the two mounting seats (12).

5. A battery string welding device, characterized in that: The battery string welding device comprises a welding assembly as described in any one of claims 1 to 4, and further comprises: a conveyor mesh belt (3) and a press, wherein the conveyor mesh belt (3) is sleeved with the receiving platform (2), the battery string to be welded is laid on the conveyor mesh belt (3) and moved by the conveyor mesh belt (3), and the press is used to be placed on the upper surface of the battery string to be welded; the intervention welding jig (1) is used to be placed above the spacing between some adjacent battery cells in the battery string to be welded, and the intervention welding jig (1) moves with the battery string to be welded.

6. The battery string welding device according to claim 5, characterized in that: The receiving platform (2) comprises a horizontal section (21) and a vertical section (22), and a plurality of wheels (23). The wheels (23) between the horizontal section (21) and the vertical section (22) are used to absorb the back film transmitted by the conveyor belt (3).

7. The battery string welding device according to claim 6, characterized in that: The battery string welding device further comprises a string laying mechanism, which is used to simultaneously grab the battery sheet, the welding ribbon and the front film and lay them on the back film.

8. The battery string welding device according to claim 7, characterized in that: The heating unit comprises a heating source, an outer cover and a heat insulation plate, wherein the heat insulation plate is attached to the outer cover, the heating source is arranged inside the outer cover, and the heat dissipation holes on the top surface of the outer cover are connected to the heat dissipation unit.

9. The battery string welding device according to claim 5, characterized in that: The interference welding jig (1) is connected to the bracket, or connected to the fixing part of the heating unit.

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