Step-by-Step Guide: Building a 36V Lithium Battery from Scratch
Lithium batteries have become increasingly popular due to their high energy density and long lifespan. If you’re looking to build your own 36V lithium battery from scratch, this step-by-step guide will walk you through the process. Building a lithium battery requires careful attention to detail and safety precautions, so it’s important to follow each step closely. First and foremost, gather all the necessary materials and tools before starting the construction process. You will need lithium battery cells, a battery management system (BMS), nickel strips, a spot welder, a soldering iron, heat shrink tubing, and a battery enclosure. It’s crucial to ensure that all the components are of high quality and compatible with each other. The first step is to determine the desired capacity of your battery. This will depend on your specific needs and the intended application. Once you have determined the capacity, calculate the number of lithium battery cells required. Each cell typically has a nominal voltage of 3.6V, so for a 36V battery, you will need ten cells connected in series. Next, prepare the battery cells by soldering nickel strips to their terminals. These strips will serve as the electrical connections between the cells. It’s important to ensure that the nickel strips are securely attached to the terminals to prevent any loose connections. After preparing the battery cells, it’s time to connect them in series. Connect the positive terminal of one cell to the negative terminal of the next cell using the nickel strips. Repeat this process until all the cells are connected in a series configuration. Double-check the connections to ensure they are secure and properly aligned. Once the cells are connected in series, it’s time to connect the BMS. The BMS is responsible for monitoring and balancing the individual cell voltages, as well as protecting the battery from overcharging or discharging. Follow the manufacturer’s instructions to connect the BMS to the battery cells. This usually involves soldering wires from the BMS to the positive and negative terminals of the battery pack. After connecting the BMS, it’s time to secure the battery pack in an enclosure. The enclosure should be made of a non-conductive material to prevent any accidental short circuits. Place the battery pack inside the enclosure and ensure that it fits securely. Use screws or other fasteners to secure the battery pack in place.
Finally, it’s time to insulate the battery pack to ensure safety and prevent any accidental short circuits. Use heat shrink tubing to cover the exposed terminals and connections. Apply heat to the tubing using a heat gun or a hairdryer to shrink it and create a tight seal around the connections.
Once the battery pack is insulated, it’s ready for use. However, it’s important to note that lithium batteries can be dangerous if mishandled or improperly used. Always follow safety guidelines and consult with experts if you have any doubts or concerns.
| Series | Lithium Voltage | LiFePO4 Voltage |
| 1S | 3.7V | 3.2V |
| 2S | 7.4V | 6.4V |
| 3S | 11.1V | 9.6V |
| 4S | 14.8V | 12.8V |
| 5S | 18.5V | 16V |
| 6S | 22.2V | 19.2V |
| 7S | 25.9V | 22.4V |
| 8S | 29.6V | 25.6V |
| 9S | 33.3V | 28.8V |
| 10S | 37V | 32V |
| 11S | 40.7V | 35.2V |
| 12S | 44.4V | 38.4V |
| 13S | 48.1V | 41.6V |
| 14S | 51.8V | 44.8V |
| 15S | 55.5V | 48V |
| 16S | 59.2V | 51.2V |
| 17S | 62.9V | 54.4V |
| 18S | 66.6V | 57.6V |
| 19S | 70.3V | 60.8V |
| 20S | 74V | 64V |
| 21S | 77.7V | 67.2V |
| 22S | 81.4V | 70.4V |
| 23S | 85.1V | 73.6V |
