Technical Requirements For Solar Panel Welding

- Jul 10, 2017-

             1. Battery test: Because of the randomness of the production condition of the battery, production of the battery performance is not the same, so in order to effectively match the performance or similar battery pack together, so should be based on its performance parameters classification; The battery test classifies the battery's output parameters (current and voltage) by measuring their size. To improve the utilization of the battery, make the quality of the battery components.

             2, Front welding: is to solder the confluence to the battery Front (negative) of the main grid line, the confluence belt for tin-plated copper tape, we use the welding machine can be welded with a number of points in the form of spot welding in the main grid line. The heat source for welding is an infrared lamp (using infrared thermal effect). The length of the ribbon is about twice times that of the battery side. The extra solder strap is connected to the back of the back of the battery chip when soldering on the back. (Our company uses manual welding)

             3, on the back of the string: the back welding is 36 pieces of battery together to form a series of components, we currently use the process is manual, the location of the battery mainly rely on a membrane board, with 36 of the cells placed in the groove, the size of the slot and the size of the battery should be, slot position has been designed, different specifications of the components using different templates, the operator using the iron and solder wire "front battery" front electrode (negative) welding "back battery" on the back of the electrode (positive), In turn, the 36-piece string is connected together and the lead is soldered in the positive and negative poles of the assembly string.

             4, laminated laying: On the back of the string, and after passing the test, the assembly string, glass and cutting good eva, glass fiber, back plate in accordance with a certain level of laying good, ready to laminate. Glass is first coated with a reagent (primer) to increase the bonding strength of the glass and Eva. The laying of the battery string and glass to ensure the relative position of the material, adjust the distance between the battery, lay a good foundation for laminating. (Laying level: from bottom up: Glass, Eva, battery, Eva, glass fiber, back plate).

             5, Component lamination: The laying of a good battery into the laminating machine, by pumping the air in the components out of the vacuum, and then heating the Eva melting the battery, glass and the back plate together; Laminating process is a key step in assembly production, laminating temperature laminating time According to the nature of Eva. When we use fast curing Eva, the laminating cycle time is about 25 minutes. The curing temperature is 150 ℃.Solar Panel

             6, Trimming: laminating when the Eva melted due to pressure to extend the solidification to form burrs, so the lamination should be cut out.

             7, loading frame: similar to the glass frame, to the glass assembly aluminum frame, to increase the strength of the component, further sealing the battery components, to extend the life of the batteries. Gaps in the border and glass assemblies are filled with silicone resin. A corner key is connected between the borders.Solar Panel

              8. Welding junction box: Weld A box on the back of the Assembly to facilitate the connection between the battery and other devices or batteries.

             9, high-pressure test: high-voltage test refers to the component frame and electrode wire between the application of a certain voltage, test components of the pressure resistance and insulation strength, in order to ensure that the components in the harsh natural conditions (lightning, etc.) without damage.Solar Panel

             10, Component testing: The purpose of the test is to calibrate the output power of the battery, test its output characteristics and determine the quality level of the component.