Method and apparatus for manufacturing extended lead electrodes of secondary battery

Abstract

A manufacturing method of expanded grid of the invention includes: (a) a step of supplying a thin plate of band form from the longitudinal direction, (b) a step of forming a plurality of intermittent cuts parallel to the edge in a first region, excluding the central portion, of the thin plate of band form, (c) a step of bending the central portion at a desired angle, and (d) a step of expanding and developing the cuts in the width direction, while moving sequentially in the longitudinal direction the thin plate having the first region forming the plurality of cuts and the central portion not having the cuts, in which the first track distance of the outermost side portion of the first region having the cuts developed and formed is nearly the same distance as the track distance of the central portion. In such the constitution, the plane distortion of the grid is eliminated, the width dimension of the grid is stable, and the quality of the electrode plate using such grid is enhanced. Further, local stress concentration of the grid is suppressed. As a result, the battery using the grid of the invention presents an excellent life characteristic, small performance fluctuation width, and a stable performance.

Description

technical field [0001] The present invention relates to a method of manufacturing extended battery grids for use in batteries. Background technique [0002] In general, the extended battery lead plate used as the core body of the battery electrode is manufactured through the following two processes: the central part of the strip-shaped thin plate made of metal such as lead or lead alloy is left, and the surface of the remaining area is staggered. A step of continuously forming intermittent cuts parallel to the width direction, and a step of expanding and expanding the cut sheet in the width direction. [0003] The expanded battery grid widely used as the battery grid of the electrode plate used for lead-acid batteries has excellent mass production performance compared with the cast battery grid, and is suitable for the mass-produced lead-acid batteries for automobiles etc. [0004] In recent years, batteries have been required to improve performance, and in order to improve...

AI Technical Summary

Problems solved by technology

[0008] Therefore, it takes a lot of time and effort to adjust the manufacturing conditions

[0009] Furthermore, the dimensional accuracy of the pole plate is unstable, resulting in an increase in mass error

[0010] In addition, because the lead plate of the battery produces local stress and strain, there is also the problem that the corrosion of the lead plate is easy to develop

Images