Understanding and Making a 2S 7.4V LiPo Battery Pack

As a leading LiPo battery manufacturer, we are committed to providing comprehensive information about our products, ensuring customers have the knowledge they need to use them safely and efficiently. In this post, we’ll explore the 2S 7.4V LiPo battery pack, its applications, and a step-by-step guide on creating one yourself. Please remember that working with LiPo batteries can be dangerous if not handled correctly, so always follow safety precautions and best practices.

What is 2S LiPo Battery Pack?

A 2S 7.4V LiPo pouch battery pack refers to a specific configuration of a Lithium Polymer (LiPo) battery, where two LiPo cells are connected in series within a flexible, flat pouch-style casing. The term “2S” indicates that there are two cells connected in series, which means their voltages add up while the capacity remains the same as that of a single cell. Each cell in a LiPo battery typically has a nominal voltage of 3.7 volts. In a 2S configuration, the voltages of the two cells add up, resulting in a combined nominal voltage of 7.4 volts (3.7V + 3.7V). However, the overall capacity (measured in milliampere-hours, or mAh) remains the same as that of the individual cells.
LiPo pouch batteries are widely used in various applications, including radio-controlled (RC) devices, drones, electric vehicles, and portable electronics, due to their lightweight design, high energy density, and the ability to be manufactured in various shapes and sizes. 

How to make a 7.4v LiPo Battery Pack?

Before attempting to make a 7.4v 2s LiPo battery pack, ensure you have the necessary knowledge, experience, and safety precautions in place. The process involves the following steps:

Gather materials

Two 3.7V LiPo cells, a compatible connector, a 2S balance connector, soldering iron and solder, and other necessary tools. If you need lipo cells, you can order them from us. We provide rectangular lipo battery, ultra-thin lipo battery, round lipo battery, cylinder lipo battery, 18650 battery, high rate 18650 battery, curved lipo battery, high discharge rate lipo battery, micro round lipo battery, hard case lithium-ion battery, rc lipo battery.

Prepare the LiPo cells

Make sure both cells have the same capacity and are in good condition. Charge the cells to the same voltage level to avoid imbalances when connecting them in series.

Connect the cells in series

Solder the positive terminal of one cell to the negative terminal of the other cell. Insulate the solder joint with electrical tape or heat shrink tubing.

Attach the main connector

Solder the main connector’s positive and negative wires to the remaining positive and negative terminals of the connected cells, respectively. Insulate both solder joints.

Attach the balance connector(if need)

Solder the balance connector’s ground, middle, and positive wires to the appropriate terminals, as detailed in the previous response. Insulate all solder joints. Generally, the 2s lipo battery does not need to add a balance connector.

Inspect and test the battery pack

Ensure all connections are secure and insulated. Check the overall voltage and balance connector using a multimeter, battery checker, or balance charger.

Wrap and protect the battery pack

Use heat shrink tubing, electrical tape, or another suitable material to wrap and protect the entire battery pack, ensuring all connections are insulated and secure.

Understanding and making a 2S 7.4V LiPo battery pack can be a rewarding experience for DIY enthusiasts or those looking for a customized solution. However, it is crucial to prioritize safety and follow best practices when handling, charging, and storing LiPo batteries. If you lack experience with LiPo batteries or soldering, consider seeking help from an experienced professional or purchasing a pre-built 2S 7.4V LiPo battery pack from a reputable manufacturer like us.

2S 7.4V LiPo Battery Models