Casting and Welding Technology of Super Large Busbar for Nuclear 1e Grade Lead-Acid Battery

Abstract

The invention relates to a battery production process, and discloses a casting and welding process for a super-large busbar of a nuclear 1E-level lead-acid battery, which includes using a casting welding machine to perform casting welding. The core temperature is 140‑160℃; the lead pot of the casting and welding machine is heated to 440‑470℃; the lead liquid enters the mold cavity; after the lead liquid in the mold cavity is filled, the tabs are inserted into the busbars of the mold, and the tabs are connected to the busbars. When the temperature probe detects that the temperature of the mold core rises to 140-160°C, the cooling water channel enters the water for cooling until the temperature of the mold core drops to 140-160°C, and then stops cooling; demoulding. The invention can be applied to the casting and welding of large lead-acid batteries, and the cooling start point and end point of the cooling can be controlled by the temperature, so that the cooling effect of the busbar can be controlled, and the cooling speed can meet the shrinkage speed of the alloy when it is cooled, so as to prevent the occurrence of shrinkage holes; The heat of each busbar is consistent in each casting and welding, and the consistency of casting and welding effect is better.

Description

technical field [0001] The invention relates to a battery production process, in particular to a super-large busbar casting and welding process for a nuclear 1E-level lead-acid battery. Background technique [0002] At present, the time control method is generally used to determine the start cooling time and the stop cooling time when casting and welding the existing super-large busbars of lead-acid batteries. If the control is good, the welding effect is very good, but there are still the following defects: (1) Lead The temperature fluctuation of the lead liquid in the pot cannot be corrected during the cooling of casting and welding, and the same cooling time is used regardless of whether the lead liquid temperature is high or the lead liquid temperature is low, resulting in fluctuations in the casting welding quality and inconsistency; (2) Mold After a long time of use, the lead liquid in the lead channel will be oxidized, resulting in changes in the amount of lead suppli...

AI Technical Summary

Problems solved by technology

[0002] At present, the time control method is generally used to determine the start cooling time and stop cooling time when the existing lead-acid battery super-large busbar is cast-welded. If the control is good, the welding effect is very good, but there are still the following defects: (1) Lead The temperature fluctuation of the lead liquid in the pot cannot be corrected during the cooling of the casting welding, and the same cooling time is used regardless of whether the temperature of the lead liquid is high or the temperature of the lead liquid is low, resulting in fluctuations in the quality of the casting welding and inconsistencies; (2) the mold After a long time of use, the lead liquid in the lead channel will be oxidized, resulting in changes in the amount of lead supplied at regular intervals. False welding occurs; (3) When the equipment is turned on or the casting is restarted after a pause in the middle, the temperature of the mold core will be different from that of continuous production, and at this time the same time is still used to control the cooling, which will cause problems in the casting and welding quality. (4) The volume of the nuclear power battery busbar is generally relatively large, which is 10 times that of the general backup valve-regulated lead-acid battery. When the busbar is cooled, the layout is prone to overheating and overcooling, resulting in shrinkage cavities, cold welding, and over-melting and other issues, such as figure 1 , figure 2 shown

If a large mold is directly immersed in the lead pot, it will absorb a lot of heat instantly, the temperature will change suddenly, and it is difficult to control the temperature of the mold

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