Charging lithium ion batteries12/4/2023 Li-ion chemistry does not need to be maintained thanks to its low self-discharge level. Most manufacturers don’t recommend the floating mode as it damages the battery over time. Solar panel is a typical example of a floating mode application. Leaving a battery on a permanent charge under a floating current after the CV mode during the charging process is called the floating mode. You’ll have to find the right trade-off between the autonomy needed, the minimum voltage at which your device can operate and the longevity of the battery. The capacity of the battery depends directly on the end-of-charge voltage so lowering the voltage will lower the battery capacity. ![]() You may also decide to reach 4.1V only, thus preserving the electrodes’ elasticity and increasing the battery's lifetime. When reaching 4.2V, you maintain this voltage level by slowly decreasing the current to 100 mA or less and then stop it. ![]() When the current is too low, the charge is finished, and the current must be removed.įor instance, to bring your MP 176065 xtd back to its 4.2V end-of-charge voltage, you can apply a 5.6A current. Once the desired voltage is reached, CV charging begins and the current decreases. ![]() You might even decide to reduce the target voltage to preserve the electrode. A CC charge is first applied to bring the voltage up to the end-of-charge voltage level. Don’t just plug it on any power supply nor use a charger designed for another technology (Nickel-Cadmium or Lead), if you don’t want to face safety issues.Ĭharging properly a lithium-ion battery requires 2 steps: Constant Current (CC) followed by Constant Voltage (CV) charging. The charger you will select has here a key role as the way you will set up parameters impacts your battery lifetime. Top tip 2: Respect a CCCV charging process, especially when on floating mode (the charger is your best friend)Ĭharging a lithium-ion battery is not that simple. This article focuses on the charging best practices but we’ll go through the discharging ones in our next article.
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