Most of the lithium-manganese dioxide batteries used today are coin-shaped and cylindrical, and the cylindrical battery has a coiled electrode core structure. The flexible package thin battery is a new product developed.
A typical open circuit voltage for a lithium manganese dioxide battery is 3.3V. The value of the operating voltage depends on the discharge rate and the ambient temperature of the discharge. The operating voltage at normal temperature is generally 2.5 to 2.8V. The termination voltage is generally taken as 2.0V. The battery of this system has the characteristics of flat discharge curve, good low temperature performance (40% of rated capacity at -20 °C), small drop in storage period (less than 1.5% annual capacity drop), and basically no voltage hysteresis. The capacity of a typical single battery is 0.025~10.SA.h.
Button cells generally only discharge at a small current, and the discharge curve is very flat and does not begin to fall until the end of capacity.
Carbon-clad batteries are commonly used in low-current, long-running equipment or instruments that deliver more capacity than coiled batteries of the same size, and the discharge curve is fairly flat during low-current discharges. The discharge curve is shown in Figure 6-12.
The wound battery is suitable for equipment that operates under high current discharge or low temperature conditions. During most of the discharge process, the discharge curve of the battery is flat, but the voltage platform is lower than the button and carbon pack batteries.
The discharge performance of the flexible packaging battery is the same as that of the cylindrical metal shell battery. The difference is that the pole piece is made thin, the inner part is a laminated piece or a plate type winding structure, and the battery case is made of a multi-composite film material without using a metal case.