About a year ago Samsung SDI started manufacturing 5th generation batteries for electric vehicles using a stacking method instead of the usual “jelly roll” method. This way the battery components can be packed more tightly, resulting in higher capacity for the same volume. Now The Elet reports that the company is preparing to use this method for smartphone batteries as well.
Batteries manufactured using the stacking method have at least 10% higher capacities than traditional roll design. This means that a 5,000mAh battery like the one in the Galaxy S22 Ultra could have a capacity of over 5,500mAh instead. Alternatively, the phones can be made thinner and lighter while maintaining the same battery capacity.
Flat roll batteries cannot be packed tightly as the natural swelling that occurs when the battery is charged and discharged can bend the electrodes, damaging them in the process. The stacked design solves this problem and allows you to fill in the dead space inside the battery.
The new batteries will reportedly be manufactured at the Cheonan plant in Korea, the company is also expected to convert one of the lines at its Tianjin plant in China to use the new method as well.
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