Polar welding has two types of manual (air welding) welding, cast welding (COS), and weld a polar group. Since hand-free welding cannot overcome the corrosion problem of negative generals, it is easy to cause short circuits for battery. More and more use of casting soldering instead of hand welding.1 The co-welding alloy generally used in the cast welding alloy is a lead alloy of 2% SN, which is suitable for PB-CA plates; 3% Sb lead alloy is cast for a total plate of the PS-SB gate.
2 Casting welding process is generally monospoically junction and the welting welding of the welting welding between the single slot, the welding of the wall is welded, and the convergence of the polar group in single slot is used as a casting welding process, usually the casting process The process is as follows: The plate stack (according to the negatively arranged) polar plate is placed in a clamp application pressure, clean the surface of the plate to be welded, and apply flux to a cleaned panel surface. , Then apply Sn preheating, insert the polar ear into the mold comb, tighten fixed, especially payment, the plate ear is inserted into the depth (insertional deeper depth), pay attention to the mold temperature (insertion Ministry, melt, and make the liquid metal in the cavity filled with the barrel, re-cast the casting welding liquid, should cause the casting to be raised, otherwise the recessed flow surface is caused. This means that the welding is not prior or easy to crack corrosion. At present, the domestic and foreign is more popular is to use the welders of the casting welding machine and Xiangxiang, a welfare metal of Xiangxiang, which can ensure the quality and performance of polar coil soldering. It greatly improves the service life of the battery!
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