Polar post and lead bushing structure and fusion welding method as well as storage battery employing structure

Abstract

The invention relates to a polar post and lead bushing structure and a fusion welding method as well as a storage battery employing the structure. The polar post and lead bushing structure comprises a lead bushing, a polar post and fusion welding bodies formed by welding the polar post, wherein the polar post and a bushing hole of the lead bushing are in clearance fit, a fusion welding end of the polar post penetrates out from the bushing hole, an inner hole wall at the upper end of the bushing hole and an outer peripheral face of the polar post form a fusion welding groove with an upper opening in an enclosure manner, and the fusion welding bodies are distributed on the surface of the polar post, the surface of the lead bushing and the interior of the fusion welding groove so as to connecting the polar post and the lead bushing into a whole through fusion welding. According to the invention, the fusion welding groove is arranged between the outer peripheral face of the polar post and the inner hole wall at the upper end of the bushing hole of the lead bushing, and flowing fusant produced during fusion welding of the polar post flows into the fusion welding groove to increase the fusion welding area between the polar post and the lead bushing. Upon differences in the depth and size of the fusion welding grooves, the finally formed fusion welding areas are different, so that an operator can design the depth and size of the fusion welding groove according to the needs of a practical situation so as to meet different technological requirements.

Description

technical field [0001] The invention relates to the field of accumulator manufacturing, in particular to a pole and lead sleeve structure and welding method, and an accumulator applying the structure. Background technique [0002] In the manufacturing process of batteries, the welding process of lead sleeves and positive and negative poles is very important, especially for batteries that need to be discharged with high current. For example, in the production process of automobile batteries, if the welding and welding of positive and negative poles and lead sleeves If the quality is not good, the welding area is small, which will lead to poor conductivity, and it will easily melt when a large current is discharged or when the car is started. [0003] Please refer to figure 1 and figure 2 , the structure of the pole and the lead sleeve used in the existing vehicle battery is usually two kinds, one such as figure 1 As shown, the pole 11 and the lead sleeve 12 are in clearan...

AI Technical Summary

Problems solved by technology

However, on the one hand, the improvement effect of the process control is not enough, and its welding area does not fully meet the process requirements, and this process control has high requirements for operators. The middle position of the welding pole makes the cold lead of the pole quickly bury the gap between the pole and the lead sleeve, resulting in such Figure 4 The welding effect, the welding area in the figure only includes the pole welding area 112 and the welding body area 111, so that the welding area between the lead sleeve 12 and the pole 11 is small, the welding quality is poor, and it is difficult to inspect during the production process. The welding area of ​​the column melts and leaks lead when a large current is discharged or the car is started. After the lead is leaked, a short circuit is likely to occur, so that there may be a hidden danger of battery fire, resulting in a large number of defective products

Images