Cylindrical lithium battery series connection skills

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.

When should a lithium battery be connected in series?

You should connect lithium batteries in series when your device requires a higher voltage than a single battery can provide. For example, if your device operates at 7.4V, connecting two 3.7V batteries in series would be appropriate. This setup is commonly used in applications like electric scooters, drones, or other high-voltage devices.

What is a series battery connection?

A series connection involves linking batteries end-to-end to increase the total voltage while keeping the same capacity (measured in milliampere-hours, or mAh). For example, connecting two 3.7V 100mAh lithium cells in series will yield a total voltage of 7.4V, but the capacity remains 100mAh.

What are the characteristics of a series battery connection?

Characteristics of Series Connection: Voltage: Sum of individual voltages (e.g., 3.7V + 3.7V = 7.4V). Capacity: Remains the same (e.g., 100mAh). Usage: Suitable for devices requiring higher voltage. Connecting Batteries in Series Pros: Increased Voltage: Connecting batteries in series adds their voltages together.

What are the characteristics of series vs parallel battery connection?

Characteristics of Series-Parallel Connection: Voltage: Combined voltage of series sets (e.g., 7.4V). Capacity: Combined capacity of parallel sets (e.g., 200mAh). Usage: Suitable for devices needing both higher voltage and longer battery life. Batteries In Series Vs Parallel：Which Is Better? Part 4. How to connect lithium batteries in series?

What are the pros and cons of connecting batteries in series?

Connecting Batteries in Series Cons: No Increase in Capacity: While the voltage increases, the total capacity remains the same as a single battery. This may limit run time. Imbalance Risk: If one battery in the series is weaker or fails, it can affect the whole series, reducing performance or causing failure.