Jelly Roll

Application ID: 105271

In a cylindrical or prismatic battery cell, the active layers, current collector metal foils and separators are wound into a “jelly roll”.

Additional tabs (metal strips) are welded to the current collector foils in order to conduct the current to the exterior of the cell can.

The interplay of the various dimensions of the layers and the tabs, in combination with the magnitude of the cell current, governs the temperature and current distribution in the battery cell.

This tutorial models the ohmic and activation losses, and the resulting temperature distribution, in a jelly roll for a pseudo-stationary case at a constant cell current.

This model example illustrates applications of this type that would nominally be built using the following products: