Method for pretreating copper insert of copper-insert terminal of lead-acid storage battery before casting

Abstract

The invention provides a method for pretreating a copper insert before casting the copper insert of a copper-insert terminal of a lead-acid storage battery in a bus bar lead alloy bush seat, which comprises the following steps: (1) cleaning the surface of the copper insert; (2) tinning the copper insert; (3) preheating the copper insert; and (4) immersing the copper insert in molten lead alloy for a moment, taking the copper insert out, swinging the copper insert to remove lead alloy not firmly adhered to the surface of the lead alloy, immediately placing the copper insert into a cavity of a lead alloy bush seat of a bus bar casting mold, and casting lead alloy. In the pretreatment method, the copper insert casting process can make the joint of the interfaces of the copper insert and the bus bar lead alloy bush seat tight enough to greatly reduce slight leakage around the copper insert during use and prolong the service life of the battery to a maximum degree. The pretreatment method is simple in step and easy in operation, well solves critical problems in battery manufacturing and using industries, and has a great realistic significance.

Description

technical field [0001] The present invention relates to a method for manufacturing battery poles, in particular to a method for manufacturing copper core poles of lead-acid batteries, and more particularly to a method for casting copper inserts of copper core poles on busbar lead alloy sleeves. A method of pre-treating copper inserts before seating. Background technique [0002] The existing electrode terminals for lead-acid batteries include lead poles, copper core embedded poles and stainless steel bolts embedded poles. The copper core embedded pole is a copper insert with a threaded blind hole in the middle, which is cast in the lead alloy socket of the busbar and used as an electrode. This pole has high strength, large contact area, small contact resistance, and easy installation. Strong and easy to use, it is a kind of electrode terminal commonly used in lead-acid batteries in recent years. However, after using this kind of copper core embedded pole for a period of ti...

AI Technical Summary

Problems solved by technology

However, after using this kind of copper core embedded pole for a period of time, there will be acid oozing around the copper insert from time to time, that is, the phenomenon of acid mist rising. This is due to the gasification of the acidic electrolyte. The acid mist has strong permeability. Once the interface between the copper insert and the lead alloy seat of the bus bar is not tightly bonded, the acid mist will pass through the wall of the lead alloy seat of the bus bar and enter the interface between the copper insert and the lead alloy seat of the bus bar. interface, tiny leaks around this copper insert will eventually lead to the failure of the battery

Because this kind of leakage is difficult to detect, even if it is detected by the usual pressure method, it will only appear after a period of use, and once the leakage occurs, it is almost irreparable, so the copper core During the use of the embedded pole, there will be slight leakage around the copper insert from time to time, which has become a problem that has plagued the battery manufacturing and usage industry for a long time