Photovoltaic cell welding equipment

Abstract

The photovoltaic cell welding equipment comprises a heating table, a cooling table and a pressing mechanism, a plurality of heating pieces are distributed on the heating table at equal intervals, the heating pieces are perpendicular to the surface of the heating table, a plurality of avoiding holes are formed in the positions, corresponding to the heating pieces, of the cooling table, and the heating pieces penetrate through the avoiding holes; a plurality of guide grooves are formed in the side, away from the heating table, of the cooling table, the guide grooves are used for fixing a welding strip, the pressing mechanism comprises a flexible pressing plate and a cover plate, a guide hole is formed in the flexible pressing plate, a guide piece is arranged on the cover plate, the guide piece can enter the guide hole in a sliding mode, and the guide hole is used for guiding the welding strip. The side, away from the cover plate, of the flexible pressing plate makes contact with one side of a battery piece, and the other side of the battery piece makes contact with the cooling table. The photovoltaic cell welding equipment provided by the invention has the advantage of high welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic production equipment, and in particular to photovoltaic cell welding equipment. Background Art

[0002] The higher the battery welding temperature, the higher the battery cell warping, affecting the reliability and yield of the battery assembly. The lack of fixation of the soldering ribbon can easily affect the welding quality. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a photovoltaic cell welding device, which has the advantage of high welding quality.

[0005] According to the photovoltaic cell welding equipment of the embodiment of the present invention, the photovoltaic cell welding equipment includes a heating platform, a cooling platform and a pressing mechanism, a plurality of heating elements are evenly distributed on the heating platform, the heating elements are perpendicular to the surface of the heating platform, a plurality of avoidance holes are arranged on the cooling platform corresponding to the heating elements for the heating elements to pass through, a plurality of guide grooves are arranged on the side of the cooling platform away from the heating platform, the guide grooves are used to fix the welding strips, the pressing mechanism includes a flexible pressing plate and a cover plate, a guide hole is arranged on the flexible pressing plate, a guide member is arranged on the cover plate, the guide member can slide into the guide hole, the side of the flexible pressing plate away from the cover plate is in contact with one side of the battery cell, and the other side of the battery cell is in contact with the cooling platform.

[0006] The photovoltaic cell welding device according to the embodiment of the present invention has the advantage of high welding quality. In some embodiments, the flexible pressing plate includes a plurality of flexible airbags, the flexible airbags correspond to and communicate with the guide holes one by one, and the guide members are gap-matched with the guide holes.

[0007] In some embodiments, the flexible airbag is filled with silicone oil.

[0008] In some embodiments, a pressure sensor is disposed on the flexible pressure plate to detect the pressure of the flexible airbag.

[0009] In some embodiments, an air supply duct is provided on the heating element, and the air supply duct is used to transfer heat to the surface of the welding strip.

[0010] In some embodiments, a slide rail is disposed on the heating platform, the heating element is slidably connected to the slide rail, and the heating element is fixed to the heating platform via a connecting member.

[0011] In some embodiments, the connecting member is a magnetic member, and the magnetic member is fixed to the heating platform by magnetic adsorption.

[0012] In some embodiments, the depth of the guide groove is less than the thickness of the welding strip, and the shape of the cross section of the guide groove is adapted to the cross section of the welding strip.

[0013] In some embodiments, the guide groove is a V-shaped groove, and the width of the guide groove is greater than the width of the welding strip.

[0014] In some embodiments, the surface of the guide groove is coated with an anti-sticking layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the explosion of the structure of the photovoltaic cell welding equipment according to an embodiment of the present invention.

[0016] Figure numerals: 1. Heating platform; 2. Heating element; 3. Cooling platform; 4. Guide groove; 5. Avoidance hole; 6. Flexible pressure plate; 7. Cover plate; 8. Guide hole; 9. Guide element; 10. Flexible airbag; 11. Battery cell. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0018] According to the photovoltaic cell welding equipment of the embodiment of the present invention, the photovoltaic cell welding equipment includes a heating platform 1, a cooling platform 3 and a pressing mechanism. A plurality of heating elements 2 are evenly spaced on the heating platform 1, and the heating elements 2 are perpendicular to the surface of the heating platform 1. A plurality of avoidance holes 5 are provided on the cooling platform 3 corresponding to the heating elements 2 for the heating elements 2 to pass through. A plurality of guide grooves 4 are provided on the side of the cooling platform 3 away from the heating platform 1, and the guide grooves 4 are used to fix the welding strip. The pressing mechanism includes a flexible pressing plate 6 and a cover plate 7. A guide hole 8 is provided on the flexible pressing plate 6, and a guide element 9 is provided on the cover plate 7. The guide element 9 can slide into the guide hole 8. The side of the flexible pressing plate 6 away from the cover plate 7 contacts one side of the battery cell, and the other side of the battery cell contacts the cooling platform 3. The welding element on the heating platform 1 is used to complete the welding operation of the welding strip, and the cooling platform 3 is used to cool the battery cell to protect the battery cell from being deformed by heat. The flexible pressing plate 6 of the pressing mechanism is used to apply pre-pressure to the battery cell to reduce the deformation of the battery cell during the welding process and prevent the battery cell from warping and cracking. The cover plate 7 is used to apply pressure to the flexible pressing plate 6. The guide groove 4 can sort out the direction of the welding ribbon to prevent the welding ribbon from moving relative to the battery cell and affecting the welding accuracy.

[0019] The photovoltaic cell welding device according to the embodiment of the present invention has the advantage of high welding quality.

[0020] In some embodiments, the flexible pressure plate 6 includes a plurality of flexible airbags 10 , the flexible airbags 10 correspond to and are connected with the guide holes 8 one by one, and the guide members 9 and the guide holes 8 are clearance-fitted.

[0021] Specifically, the flexible airbag 10 can be arranged according to the size and shape of the battery cell. The flexible airbag 10 is connected to the guide hole 8. As the guide member 9 enters and exits the guide hole 8, the internal pressure of the flexible airbag 10 changes, causing the flexible airbag 10 to expand or contract, thereby changing the contact area between the flexible airbag 10 and the battery cell.

[0022] In some embodiments, the flexible airbag 10 is filled with silicone oil.

[0023] Specifically, the viscosity of the silicone oil can be selected according to the temperature of the welding process. The thermal conductivity of the silicone oil can dissipate heat at the welding point of the battery cell to a certain extent and protect the battery cell.

[0024] In some embodiments, a pressure sensor is disposed on the flexible pressure plate 6 to detect the pressure of the flexible airbag 10 .

[0025] Specifically, the pressure sensor is a capacitive pressure sensor, and the sensor can be arranged at the center and edge of the airbag to obtain a more comprehensive pressure monitoring result and better protect the battery cell.

[0026] In some embodiments, an air supply duct is provided on the heating element 2, and the air supply duct is used to transfer heat to the surface of the welding strip.

[0027] Specifically, the air supply duct supplies hot air to the surface of the solder strip for heat transfer, which can preheat the solder strip, improve the heating efficiency, reduce the subsequent heating time of the heating element 2, and further protect the battery cell.

[0028] In some embodiments, a slide rail is disposed on the heating platform 1, the heating element 2 is slidably connected to the slide rail, and the heating element 2 is fixed to the heating platform 1 via a connecting member.

[0029] Specifically, the heating element 2 can slide along the slide rail to adjust the distance between the heating element 2 and the adjacent heating element 2, which can adapt to the distribution requirements of the welding points of battery cells of different specifications and adapt to more products.

[0030] In some embodiments, the connecting member is a magnetic member, and the magnetic member is fixed to the heating platform 1 by magnetic adsorption.

[0031] Specifically, the magnetic attraction member is a neodymium iron boron magnet, which is fixed on the heating member 2. After the heating member 2 is moved to the target position, the magnetic attraction member and the heating platform 1 are magnetically adsorbed and fixed to prevent the relative movement of the heating member 2 from affecting the welding accuracy.

[0032] In some embodiments, the depth of the guide groove 4 is less than the thickness of the welding strip, and the shape of the cross section of the guide groove 4 is adapted to the cross section of the welding strip.

[0033] Specifically, the depth of the guide groove 4 is less than the thickness of the solder strip, which facilitates the subsequent movement of the solder strip and avoids too large a gap between the solder strip and the battery cell. The cross-sectional shape of the guide groove 4 is adapted to the cross-sectional shape of the solder strip, which can reduce the movement of the solder strip. The solder strip can be placed by passing the solder strip from one end of the guide groove 4 to the other end, thereby improving the efficiency of solder strip placement.

[0034] In some embodiments, the guide groove 4 is a V-shaped groove, and the width of the guide groove 4 is greater than the width of the welding strip.

[0035] Specifically, when the guide groove 4 is a V-shaped groove, the solder strip can be protruded from the low temperature platform, so as to prevent the solder strip from melting and adhering to the low temperature platform, and prevent the solder strip from shifting during the preheating and welding process. The design of the V-shaped groove can make the placement and removal of the solder strip more convenient and improve the operation efficiency. The width of the guide groove 4 is greater than the width of the solder strip, so as to ensure that the solder strip will not shift laterally in the groove and maintain a stable position.

[0036] In some embodiments, the surface of the guide groove 4 is coated with an anti-sticking layer.

[0037] Specifically, the anti-sticking layer is made of polytetrafluoroethylene or polyethylene to prevent the soldering ribbon from sticking to the guide groove 4, making it easier to remove the soldering ribbon.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A photovoltaic cell welding device, characterized in that: include: A heating platform, wherein a plurality of heating elements are evenly spaced and arranged perpendicular to the surface of the heating platform; A cooling platform, wherein a plurality of avoidance holes are arranged on the cooling platform corresponding to the heating element for the heating element to pass through, and a plurality of guide grooves are arranged on a side of the cooling platform away from the heating platform, and the guide grooves are used to fix the welding strip; A pressing mechanism, the pressing mechanism includes a flexible pressing plate and a cover plate, the flexible pressing plate is provided with a guide hole, the cover plate is provided with a guide member, the guide member can slide into the guide hole, the side of the flexible pressing plate away from the cover plate is in contact with one side of the battery cell, and the other side of the battery cell is in contact with the cooling platform.

2. The photovoltaic cell welding equipment according to claim 1, characterized in that: The flexible pressing plate includes a plurality of flexible airbags, the flexible airbags correspond to and are connected with the guide holes one by one, and the guide members are clearance-matched with the guide holes.

3. The photovoltaic cell welding equipment according to claim 2, characterized in that: The flexible airbag is filled with silicone oil.

4. The photovoltaic cell welding equipment according to claim 2, characterized in that: A pressure sensor is arranged on the flexible pressing plate to detect the pressure of the flexible airbag.

5. The photovoltaic cell welding equipment according to claim 1, characterized in that: The heating element is provided with an air supply duct, and the air supply duct is used for transferring heat to the surface of the welding strip.

6. The photovoltaic cell welding equipment according to claim 1, characterized in that: The heating platform is provided with a slide rail, the heating element is slidably connected to the slide rail, and the heating element is fixed to the heating platform via a connecting member.

7. The photovoltaic cell welding equipment according to claim 6, characterized in that: The connecting piece is a magnetic piece, and the magnetic piece is fixed to the heating platform by magnetic adsorption.

8. The photovoltaic cell welding equipment according to claim 1, characterized in that: The depth of the guide groove is less than the thickness of the welding strip, and the shape of the cross section of the guide groove is adapted to the cross section of the welding strip.

9. The photovoltaic cell welding equipment according to claim 8, characterized in that: The guide groove is a V-shaped groove, and the width of the guide groove is greater than the width of the welding strip.

10. The photovoltaic cell welding equipment according to claim 8, characterized in that: The surface of the guide groove is coated with an anti-sticking layer.

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