Cast welding process for ultra-large busbar of nuclear 1E-grade lead-acid storage battery

Abstract

The invention relates to a battery production process, and discloses a cast welding process for the ultra-large busbar of a nuclear 1E-grade lead-acid storage battery. The cast welding process comprises the following steps: cast-welding is carried out by adopting a cast-welding machine, and the temperature of a lead pan is set to be 440-470 DEG C and the temperature of a mold core to be 140-160 DEG C in the cast-welding process; a lead pan of the cast-welding machine is heated to 440-470 DEG C; the lead liquid enters a mold cavity; after the mold cavity is filled with the lead liquid, the tabs are inserted into the busbars of the mold, and the tabs are combined with the busbars; when a temperature probe detects that the temperature of the mold core rises to 140-160 DEG C, water enters a cooling water channel for cooling, and cooling is stopped until the temperature of the mold core falls back to 140-160 DEG C; and demolding is carried out. The cast welding process can be suitable for cast welding of a large lead-acid battery, the cooling starting point and the cooling ending point are well controlled through the temperature, the cooling effect of the busbar is controllable, meanwhile, the cooling speed conforms to the shrinkage speed during alloy cooling, and shrinkage cavities are completely eradicated; and the heat for cast welding of each busbar each time can be ensured to be consistent, and the cast welding effect consistency is good.

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 storage battery. Background technique [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 a...

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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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