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 lithium batteries with different voltages be grouped in series?

Do not let lithium batteries with different voltages in series. Due to the problem of consistency of lithium batteries, they are grouped in series under the same system (such as ternary or lithium iron), and they also need to be selected with the same voltage, internal resistance, and capacity.

What happens if you wire a lithium ion battery in series?

Either way, once you wire a set of lithium-ion batteries in series, it will form an open-ended chain. At the ends of the chain, you will find your main negative and positive connections. When battery cells are wired in series, their voltages are added but their amp hours are not.

What if the battery configuration is in series?

If we connect the positive (+) terminal of battery to negative (-) and negative to positive terminal as shown in the below fig, then the batteries configuration would be in series.

Are lithium-ion batteries wired in series?

In fact, every battery pack we sell consists of a collection of cells that have been wired in series (and often in parallel, too). In this guide, we'll walk you through the steps of safely wiring lithium-ion batteries in series to create a higher voltage battery pack for your projects.

What happens if a lithium battery reaches the overcharge protection voltage?

When charging in series, if the voltage of a single lithium battery reaches the overcharge protection voltage, the battery management system will cut off the entire series charging circuit and stop charging to prevent the single battery from being overcharged, which will cause other lithium batteries to be unable to be fully charged.