A multi-layer coiling column battery and its making technology

Abstract

A multilayer winding cylindrical cell and the fabrication process thereof comprise a separator, anode plates and cathode plates. The separator, the anode plates and the cathode plates are in multilayer, and the separator, the anode plates and the cathode plates are wound into a cylindrical roll core through layer lamination. The same electrode plates are connected in parallel with each other. The cylindrical cell fabricated by the invention through a multilayer winding technology can efficiently reduce the internal resistance of the cell owing to multilayer winding and mutual connection in parallel of the electrode plates. The size of the anode and the cathode plates using multilayer winding is shorter, and the work efficiency can be improved. The cell capacity can be infinitely increased through a parallel mode.

Description

technical field [0001] The invention relates to a large-capacity cylindrical battery and a manufacturing process thereof, in particular to a multilayer winding cylindrical battery and a manufacturing process thereof. Background technique [0002] With the development of the economy and the improvement of people's living standards, people's demand for large-capacity cylindrical batteries with high energy density is becoming stronger and stronger. Cylindrical batteries have obvious advantages over square batteries. Cylindrical batteries have higher space utilization. The effect is good, and the internal structure is compact, and the effective space is rationally used. [0003] At present, the winding of cylindrical batteries is limited to the use of a single-layer positive electrode sheet, a single-layer negative electrode sheet and a separator to separate the positive and negative electrode sheets. For small-capacity batteries, single-layer winding is advisable, but for large...

AI Technical Summary

Problems solved by technology

[0003] At present, the winding of cylindrical batteries is limited to the use of a single-layer positive electrode sheet, a single-layer negative electrode sheet and a separator to separate the positive and negative electrode sheets. For small-capacity batteries, single-layer winding is advisable, but for large-capacity batteries, the battery The outer diameter is relatively large. If single-layer winding is adopted, it is necessary to make long positive and negative electrodes, which causes certain difficulties in winding. There are certain difficulties, and the internal resistance of the produced battery is also relatively large

Images