Battery piece repairing device

Abstract

The utility model provides a battery piece repairing device. The battery piece repairing device comprises a heating bottom plate, a clamping mechanism and a mounting table arranged above the heating bottom plate. The clamping mechanism comprises a clamping body and a clamping arm, and the clamping body is mounted on the mounting table; the clamping arm is provided with a connecting end and a clamping end in the length direction, the connecting end is connected with the clamping body, and the clamping end is used for clamping a welding strip so that the relative position of the welding strip and a battery piece arranged on the heating bottom plate can be kept unchanged. Therefore, the solder strip can be prevented from deviating, and the repair efficiency of the battery piece is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell technology, and in particular to a cell repair device. Background Art

[0002] Solar cells usually use welding ribbons to connect multiple cells in series to form a cell string. After each cell is welded with the welding ribbon, EL (Electroluminescent) testing is required to detect whether there are problems such as welding ribbon leakage, cold welding, offset or hidden cracks in the cell during the welding process, and the unqualified cells are repaired. The traditional repair method is to first place the cell that needs to be repaired on the cell repair device, and then melt the PAD welding point between the cell and the welding ribbon to desolder and remove all the welding ribbons, and then replace the new cell and the welding ribbon for re-welding. However, due to the lack of welding ribbon positioning device in the cell repair device, the welding ribbon is prone to offset during the repair process, which will cause low repair efficiency.

[0003] In particular, BC (Back Contact) cells only weld the solder strips on the back of the cell. Since there is no electrode on the front of the cell, there is no need to weld the solder strips. Therefore, the front is basically unobstructed. Compared with the traditional double-sided cells formed by welding the solder strips on both the front and back of the cell, the solar absorption efficiency and photoelectric conversion efficiency of the cell are greatly improved. However, during the cell repair process of BC cells, due to the increase in the number of solder strips that need to be welded on the back of the cell, the distance between adjacent solder strips is small. If the solder strip is offset, it will also affect the welding process of other solder strips. Utility Model Content

[0004] The present application provides a battery cell repair device, which can prevent the soldering strip from shifting during the repair process, thereby improving the repair efficiency of the battery cell.

[0005] Specifically, the present application is implemented through the following technical solutions:

[0006] The present application provides a battery cell repair device, comprising:

[0007] A heating base plate, a clamping mechanism and a mounting platform arranged above the heating base plate; the clamping mechanism includes a clamping body and a clamping arm, and the clamping body is installed on the mounting platform; the clamping arm has a connecting end and a clamping end along the length direction, the connecting end is connected to the clamping body, and the clamping end is used to clamp the welding strip so that the relative position of the welding strip and the battery sheet placed on the heating base plate remains unchanged.

[0008] Optionally, the clamping body includes a bearing portion and a connecting portion connected to each other; the bearing portion is located below the connecting portion and is used to bear the welding strip; the connecting end is movably connected to the connecting portion, and the clamping end is used to cooperate with the bearing portion to clamp the welding strip.

[0009] Optionally, the bearing portion includes a first part and a second part extending upward from the first part; the first part is used to bear the welding strip, and the clamping end is rotatably connected to the second part; the clamping arm has a first state and a second state, and in the first state, the clamping end is rotated to be separated from the first part; in the second state, the clamping end is rotated to contact with the first part to clamp the welding strip.

[0010] Optionally, the heating base plate includes a base plate body and a plurality of solder strip installation grooves arranged on the base plate body; the plurality of solder strip installation grooves are arranged in sequence along the width direction of the base plate body, and each of the solder strip installation grooves extends along the length direction of the base plate body.

[0011] Optionally, the battery cell repair device further comprises a pressing member, which is arranged at at least one end of the base plate body along the length direction of the base plate body and is used to press the welding strip against the surface of the base plate body.

[0012] Optionally, the cell repair device further includes a horizontal adjustment mechanism and a press screen; the press screen is laid on the upper surface of the heating base plate, and the horizontal adjustment mechanism is arranged between the upper surface and the press screen to adjust the flatness of the press screen.

[0013] Optionally, the battery cell repair device also includes a fastening structure; the width of the pressing net is greater than the width of the battery cell, the pressing net is provided with through holes on opposite sides along the width direction, the heating base plate is provided with fastening holes at positions corresponding to the through holes, and the fastening structure passes through the through holes and cooperates with the fastening holes.

[0014] Optionally, the battery cell repair device further includes a lifting mechanism, and the clamping body is mounted on the mounting platform via the lifting mechanism.

[0015] Optionally, the lifting mechanism includes a slide rail and a slider slidably connected to the slide rail; the lifting mechanism includes a slide rail and a slider slidably connected to the slide rail; one of the slider and the clamping body is provided with a strip hole extending in the horizontal direction, and the other is provided with a slide rod slidably matched with the strip hole.

[0016] Optionally, the battery cell repair device further includes an insertion and extraction pin, the heating base plate is provided with an insertion and extraction hole, and the insertion and extraction pin cooperates with the edge of the battery cell and is inserted into the insertion and extraction hole.

[0017] The technical solution provided by this application can achieve the following beneficial effects:

[0018] The present application provides a battery cell rework device, which installs a clamping mechanism on a mounting platform located above a heating base plate. After the battery cell is placed on the heating base plate, the clamping arm can clamp the soldering strip so that the relative position of the soldering strip and the battery cell placed on the heating base plate remains unchanged, which can prevent the soldering strip from shifting during the rework process, thereby improving the rework efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a battery cell repair device shown in an exemplary embodiment of the present application.

[0020] Figure 2 It is a structural schematic diagram showing an exemplary embodiment of the present application showing a clamping mechanism installed on a mounting platform.

[0021] Figure 3 is a front view of a clamping mechanism shown in an exemplary embodiment of the present application.

[0022] Figure 4 It is a schematic structural diagram of a heating base plate shown in an exemplary embodiment of the present application.

[0023] Figure 5 This is a diagram of the traditional placement of solder strips.

[0024] Figure 6 It is a schematic diagram of an improved placement method of the soldering strip shown in an exemplary embodiment of the present application; wherein i is the state of the soldering strip before the placement and cutting is completed, and ii is the state of the soldering strip after the placement and cutting is completed.

[0025] Figure 7 It is a schematic structural diagram of a fastener fastening press net shown in an exemplary embodiment of the present application.

[0026] Figure 8 It is a schematic diagram of a structure in which a pressing grid is pressed above a battery cell, shown as an exemplary embodiment of the present application.

[0027] 10. Heating base plate; 101. Base plate body; 102. Solder strip mounting groove; 103. Fastening hole; 104. Plug-in hole; 11. Clamping mechanism; 111. Clamping body; 1111. Bearing part; 1111a. First part; 1111b. Second part; 1112. Connecting part; 112. Clamping arm; 1121. Connecting end; 1122. Clamping end; 113. Elastic member; 114. Rotating shaft; 13. Mounting table; 14. Pressing member; 15. Horizontal adjustment mechanism; 16. Pressing net; 161. Through hole; 162. Pressing needle; 17. Fastening structure; 18. Lifting mechanism; 181. Slide rail; 182. Slider; 19. Strip hole; 20. Plug-in needle; 21. Solder strip; 210. Cutting position; 22. Battery cell; 100. Battery cell repair device. DETAILED DESCRIPTION

[0028] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings.

[0029] See also Figure 1 and Figure 2 The present application provides a cell rework device 100, comprising a heating base plate 10, a clamping mechanism 11 and a mounting platform 13 arranged above the heating base plate 10; the clamping mechanism 11 comprises a clamping body 111 and a clamping arm 112, the clamping body 111 is mounted on the mounting platform 13; the clamping arm 112 has a connecting end 1121 and a clamping end 1122 along the length direction, the connecting end 1121 is connected to the clamping body 111, and the clamping end 1122 is used to clamp a welding strip 21 so that the relative position between the welding strip 21 and the cell 22 placed on the heating base plate 10 remains unchanged. Thus, the welding strip 21 can be prevented from being offset during the rework process, so as to achieve rapid positioning of the welding strip 21 and improve the rework efficiency of the cell 22. Exemplarily, the clamping end 1122 of the clamping arm can be configured as a clamping claw structure for clamping the welding strip 21.

[0030] It should be noted that the clamping body 111 can be detachably assembled to the mounting platform 13, for example, including but not limited to snap-fitting; of course, the clamping body 111 can also be fixedly assembled to the mounting platform 13, for example, including but not limited to riveting. In addition, the connecting end 1121 is connected to the clamping body, and can be integrally formed, or can be separately processed and then detachably connected or fixedly connected together.

[0031] Please continue reading Figure 1 and Figure 2In one embodiment, the cell repair device 100 further includes a lifting mechanism 18, and the clamping body 111 is mounted on the mounting table 13 via the lifting mechanism 18. Thus, the clamping mechanism 11 can be moved up and down in the vertical direction relative to the heating base plate 10, and the clamping arm 112 can be adjusted to a suitable position to clamp the welding ribbon 21. Exemplarily, the power source of the lifting mechanism 18 can be a cylinder, which drives the slider 182 to slide relative to the slide rail 181. Of course, in other examples, the power source of the lifting mechanism 18 can also be a motor.

[0032] In one embodiment, the lifting mechanism 18 includes a slide rail 181 and a slider 182 slidably connected to the slide rail 181; one of the slider 182 and the clamping body 111 is provided with a strip hole 19 extending in the horizontal direction, and the other is provided with a slide bar slidably matched with the strip hole 19. Thus, the clamping mechanism 11 can be finely adjusted left and right along the extending direction of the strip hole 19 according to the position of the welding strip 21, so as to improve the clamping accuracy of the clamping mechanism.

[0033] It should be noted that the number of clamping arms can be adaptively adjusted according to the number of welding strips 21 .

[0034] See also Figure 2 and Figure 3 In one embodiment, the clamping body 111 includes a bearing portion 1111 and a connecting portion 1112 connected to each other; the bearing portion 1111 is located below the connecting portion 1112 and is used to bear the soldering strip 21; the connecting end 1121 is movably connected to the connecting portion 1112, and the clamping end 1122 is used to cooperate with the bearing portion 1111 to clamp the soldering strip 21. Thus, the soldering strip 21 can be clamped between the clamping end 1122 and the bearing portion 1111, thereby improving the clamping stability of the soldering strip 21.

[0035] Exemplarily, the connection end 1121 of the clamping arm 112 can be rotatably connected to the connection portion 1112 of the clamping body 111 via a rotation shaft sleeved with a torsion spring. When the connection end 1121 of the clamping arm 112 rotates around the rotation shaft, a gap is formed between the clamping end 1122 and the bearing portion 1111 for inserting the welding ribbon 21. After the welding ribbon 21 is placed on the bearing portion 1111, the torsion spring can cause the clamping arm 112 to twist to restore to the original position, so that the clamping end 1122 of the clamping arm 112 abuts against the bearing portion 1111 to clamp the welding ribbon 21.

[0036] Please continue reading Figure 3In one embodiment, the bearing portion 1111 includes a first portion 1111a and a second portion 1111b extending upward from the first portion 1111a; the first portion 1111a is used to bear the solder strip 21, and the clamping end 1122 is rotatably connected to the second portion 1111b; the clamping arm 112 has a first state and a second state, in the first state, the clamping end 1122 rotates to separate from the first portion 1111a; in the second state, the clamping end 1122 rotates to contact with the first portion 1111a to clamp the solder strip 21. Thus, the rotation process of the clamping arm can be made more stable, and the clamping stability of the solder strip 21 is improved.

[0037] Exemplarily, the connection end 1121 of the clamping arm 112 is connected to the connection portion 1112 of the clamping body 111 through an elastic member 113 such as a spring. In the first state, the clamping end 1122 of the clamping arm 112 rotates counterclockwise around the rotation axis 114 to rotate until there is a gap between the arc-shaped end surface of the clamping end 1122 and the first portion 1111a for inserting the soldering ribbon 21. After the soldering ribbon 21 is placed on the first portion 1111a, the clamping arm 112 switches from the first state to the second state, that is, the clamping end 1122 rotates clockwise around the rotation axis 114 to rotate until the arc-shaped end surface of the clamping end 1122 contacts the first portion 1111a, so as to clamp the soldering ribbon 21 between the clamping end 1122 and the first portion 1111a.

[0038] See also Figure 4 In one embodiment, the heating base plate 10 includes a base plate body 101 and a plurality of welding strip installation grooves 102 disposed on the base plate body 101; the plurality of welding strip installation grooves 102 are arranged in sequence along the width direction y of the base plate body 101, and each welding strip installation groove 102 extends along the length direction x of the base plate body 101. Thus, the entire welding rod can be placed in the welding strip installation groove 102, thereby increasing the placement speed of the welding strip 21.

[0039] like Figure 5 As shown, the traditional way of placing the welding tape 21 is: first cut the welding tape 21 into multiple welding tape segments at the cutting position 210 of the welding tape 21, and then sequentially place the multiple welding tape segments in multiple installation grooves spaced apart along the length direction y of the bottom plate body 101, and then weld them with the battery cell 22. In this process, since there are a large number of cut welding tape segments, placing them in each installation groove in sequence will not only take up too much time, reduce maintenance efficiency, but also make the operation difficult. Therefore, the present application makes an improvement on the traditional heating base plate 10, and connects the multiple installation grooves spaced apart along the length direction x of the bottom plate body 101 to form a welding tape installation groove 102, so that the entire welding tape 21 can be placed in the welding tape installation groove 102 (such as Figure 6 The soldering tape 21 is placed in the state before cutting as shown in FIG. 1 ). Then the soldering tape 21 is cut into sections (such as Figure 6 ii shows the state where the soldering tape 21 is placed and cut. Thus, not only can the placement time of the soldering tape 21 be shortened, the repair efficiency is improved, but also the placement difficulty of the soldering tape 21 is reduced.

[0040] See also Figure 1 and Figure 7 In one embodiment, the cell repair device 100 further includes a holding member 14, which is disposed at at least one end of the base plate body 101 along the length direction of the base plate body 101, and is used to hold the welding strip 21 on the surface of the base plate body 101. In this way, the welding strip 21 located at the end of the base plate body 101 can be straightened to resist the thermal shrinkage force generated by the welding strip 21 during the welding process, thereby effectively reducing the warping of the battery string. Exemplarily, the holding member 14 can be configured as a strip structure extending along the width direction y of the heated base plate 10. Of course, the shape of the holding member 14 is not limited thereto. In other examples, the shape of the holding member 14 can also be designed as any symmetrical structure such as a square or other asymmetrical structure.

[0041] Please continue reading Figure 7 In one embodiment, the cell repair device 100 further includes a horizontal adjustment mechanism 15 and a press screen 16; the press screen 16 is laid on the upper surface of the heating base plate 10, and the horizontal adjustment mechanism 15 is disposed between the upper surface and the press screen 16, and is used to adjust the flatness of the press screen 16. Thus, by leveling the press screen 16 through the horizontal adjustment mechanism 15, the press screen 16 can be made flatter in the horizontal direction, and the insufficient flatness of the press screen 16 can be prevented from causing problems such as cold solder joints and hidden cracks in the cell 22. Exemplarily, the horizontal adjustment mechanism 15 can be an adjusting nut, which is disposed at the four corners of the press screen 16. Of course, the structure of the horizontal adjustment mechanism 15 is not limited to this.

[0042] Please continue reading Figure 7 The pressing net 16 is provided with a plurality of pressing pins 162 on the side facing the heating base plate 10 , and each pressing pin 162 is used to abut against the front surface of the battery cell 22 and the position corresponding to the PAD welding point to ensure reliable welding at the PAD welding point.

[0043] See also Figure 7 and Figure 8In one embodiment, the cell repair device 100 further includes a fastening structure 17; the width of the pressing net 16 is greater than the width of the cell 22, and the pressing net 16 is provided with through holes 161 on opposite sides along the width direction, and the heating base plate 10 is provided with fastening holes 103 at positions corresponding to the through holes 161, and the fastening structure 17 passes through the through holes 161 and cooperates with the fastening holes 103. Thus, the pressing net 16 can be fastened above the cell panel to achieve the positioning of the pressing net 16. Exemplarily, the fastening structure 17 can be a hand screw or a stud, but is not limited thereto.

[0044] Please continue reading Figure 7 and Figure 8 In one embodiment, the battery cell repair device 100 further includes an insertion pin 20, and the heating base plate 10 is provided with an insertion hole 104, and the insertion pin 20 cooperates with the edge of the battery cell 22 and is inserted into the insertion hole 104. In this way, the battery cell 22 can be positioned to prevent the battery cell 22 from being offset.

[0045] It should be noted that the cell repair device 100 provided in the present application can be applicable to a variety of solar cells, such as but not limited to heterojunction cells (HIJ cells), TOPCon cells, BC cells, etc.

[0046] The above embodiments can be combined with each other under the premise that the technical means recorded in each embodiment do not conflict with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A battery cell repair device, characterized in that: include: A heating base plate, a clamping mechanism and a mounting platform arranged above the heating base plate; the clamping mechanism includes a clamping body and a clamping arm, and the clamping body is installed on the mounting platform; the clamping arm has a connecting end and a clamping end along the length direction, the connecting end is connected to the clamping body, and the clamping end is used to clamp the welding strip so that the relative position of the welding strip and the battery sheet placed on the heating base plate remains unchanged.

2. The battery cell repair device according to claim 1, characterized in that: The clamping body includes a bearing portion and a connecting portion connected to each other; the bearing portion is located below the connecting portion and is used to bear the welding strip; the connecting end is movably connected to the connecting portion, and the clamping end is used to cooperate with the bearing portion to clamp the welding strip.

3. The battery cell repair device according to claim 2, characterized in that: The bearing portion includes a first portion and a second portion extending upward from the first portion; the first portion is used to bear the welding strip, and the clamping end is rotatably connected to the second portion; the clamping arm has a first state and a second state, and in the first state, the clamping end is rotated to be separated from the first portion; In the second state, the clamping end rotates to contact the first portion to clamp the welding ribbon.

4. The battery cell repair device according to claim 1, characterized in that: The heating base plate includes a base plate body and a plurality of welding strip installation grooves arranged on the base plate body; the plurality of welding strip installation grooves are arranged in sequence along the width direction of the base plate body, and each of the welding strip installation grooves extends along the length direction of the base plate body.

5. The battery cell repair device according to claim 4, characterized in that: The battery cell repair device also includes a pressing member, which is arranged at at least one end of the base plate body along the length direction of the base plate body and is used to press the welding strip on the surface of the base plate body.

6. The battery cell repair device according to any one of claims 1 to 5, characterized in that: The cell repair device also includes a horizontal adjustment mechanism and a press net; the press net is laid on the upper surface of the heating base plate, and the horizontal adjustment mechanism is arranged between the upper surface and the press net to adjust the flatness of the press net.

7. The battery cell repair device according to claim 6, characterized in that: The battery cell repair device also includes a fastening structure; the width of the pressing net is greater than the width of the battery cell, the pressing net is provided with through holes on opposite sides along the width direction, the heating base plate is provided with fastening holes at positions corresponding to the through holes, and the fastening structure passes through the through holes and cooperates with the fastening holes.

8. The battery cell repair device according to any one of claims 1 to 5, characterized in that: The battery cell repair device further includes a lifting mechanism, and the clamping body is mounted on the mounting platform via the lifting mechanism.

9. The battery cell repair device according to claim 8, characterized in that: The lifting mechanism comprises a slide rail and a slider slidably connected to the slide rail; one of the slider and the clamping body is provided with a strip hole extending in the horizontal direction, and the other is provided with a slide rod slidably matched with the strip hole.

10. The battery cell repair device according to any one of claims 1 to 5, characterized in that: The battery cell repair device also includes an insertion and extraction pin, the heating base plate is provided with an insertion and extraction hole, and the insertion and extraction pin cooperates with the edge of the battery cell and is inserted into the insertion and extraction hole.

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