Battery cast-weld bottom-die mold

Abstract

The application discloses a battery cast-weld bottom-die mold. The battery cast-weld bottom-die mold comprises a positive electrode baseplate and a negative electrode baseplate, wherein the positive electrode baseplate is provided with a positive cylinder manifold mold cavity; the negative electrode baseplate is provided with a negative cylinder manifold mold cavity; the positive electrode baseplate is connected with the negative electrode baseplate; and the specific-heat capacity of the material of the positive electrode baseplate is greater than that of the material of the negative electrode baseplate. According to the battery cast-weld bottom-die mold, since the specific-heat capacity of the material adopted by the positive electrode baseplate is greater than that of the material adopted by the negative electrode baseplate, on the condition that the mass of the material adopted by the positive electrode baseplate is equal to that of the material adopted by the negative electrode baseplate, the heat is released by the positive electrode baseplate and used for melting a positive electrode tab is more than that released by the negative electrode baseplate and used for melting a negative electrode tab during cast-welding so as to meet the requirement that the melting of the positive electrode tab needs more heat than that of the positive electrode tab because the positive electrode tab is thicker than the negative electrode tab. Therefore, the battery cast-weld bottom-die mold can enable the positive electrode tab and the negative electrode tab to achieve the same cast-weld effect and solves the problems of insufficient welding and false welding.

Description

technical field [0001] The application relates to the field of battery manufacturing, in particular to a battery casting and welding bottom mold. Background technique [0002] Lead-acid batteries are widely used and are mainly used in important fields such as automobiles, motorcycles, railways, stations, docks, mine handling, ships, submarines, communications, aviation, water navigation marks, medical equipment, and national defense scientific research. an essential part. [0003] At present, the production by casting welding is the future development trend of lead-acid batteries. The essence of casting welding is the process of melting the lead alloy at the welded part of the battery tab and the lead alloy of the bus bar. The alloy melts for effective welding. However, due to the low specific heat of the lead alloy, the thermal energy of the lead alloy of the busbar is often not enough to melt the tabs during casting welding, resulting in false welding and false welding. ...

AI Technical Summary

Problems solved by technology

However, due to the low specific heat of the lead alloy, the heat energy of the busbar lead alloy is often not enough to melt the tabs during casting welding, resulting in false welding and false welding.

At the same time, because the negative tab of the battery is thinner than the positive tab, the heat required to melt the positive tab is more than the heat required to melt the negative tab

Usually, in order to solve this problem, the method of increasing the size of the positive busbar and appropriately reducing the size of the negative busbar is adopted, but this will increase the lead consumption of the battery and increase the cost

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