Yes, you can charge batteries in series if they are identical 12V batteries. Each 12V battery has six cells, resulting in a total voltage of 24V when two batteries are connected.
How to connect lithium ion batteries in series?
Connecting battery cells in series is a pretty straightforward process, but there are some key elements that should be understood before doing so. To connect lithium-ion batteries in series, all you have to do is connect the positive connection of the first cell to the negative connection of the next one.
Can You charge lithium batteries in series?
Charging lithium battery cells while they are in a series configuration is not only possible but very common. It's how ebike, laptops, and just about any other battery chargers work. When charging lithium batteries in series, the charge voltage is divided among the number of cells in series.
How do you charge a lithium ion battery in series?
When charging lithium batteries in series, the charge voltage is divided among the number of cells in series. As long as each cell has about the same resistance, then the voltage will be split equally. An NMC lithium-ion battery cell has a max charge voltage of 4.2 volts.
When connecting lithium-ion batteries in series, an open-ended chain is formed that will have a free connection on either end. These end connections are the battery's main negative and main positive connections. Adding battery cells in series adds their voltages together while not changing the amp hours.
Can lithium batteries be wired in series?
So, in review, wiring lithium batteries in series is just as simple as wiring lithium cells in series. The difference is that lithium batteries have a BMS which contains MOSFETs that might not be able to handle the higher voltage that they would experience when one battery dies.
Why do lithium ion batteries need a battery management circuit?
If the cells are protected and one cell charges faster than the other it's protection will cut it off and current will not flow the other battery in series. That is the function of battery management circuits. Lithium ion batteries are fully charged at 4.2V, and discharged at about 3 V.