Extended Data Fig. 7: Internal inhomogeneous strain in different layers of cylindrical batteries.
From: Wireless transmission of internal hazard signals in Li-ion batteries
a–f, Internal strain in different winding layers during cycles at the rate of 0.2 C: 4th and 15th layers (a); 5th and 15th layers (b); 9th and 15th layers (c); 11th and 15th layers (d); 13th layer (e); 14th layer (f). g, The spiral-wound structure geometric model of cylindrical batteries. h, Schematic diagram of load and constraints. i, Circumferential strain contour of Al current collector by simulation.
