2kWh lithium ion battery (12v)

Building a DIY 2kWh Lithium-Ion Battery Pack for 12V DC Applications

Introduction: In this article, we will delve into the process of building a DIY 2kWh lithium-ion battery pack capable of delivering 12V DC power. The battery pack consists of small lithium-ion cells from My Sky Power, arranged in a configuration of parallel and series connections. With a total of 216 cells, each providing 9.25Wh power, the battery pack is configured as 3S72P, offering a total of 2kWh of battery power. To ensure safety and protection, two 100Amp Battery Management Systems (BMS) are employed. This battery pack can output a continuous current of 200Amps and can be charged up to 100Amps.

Understanding the Lithium-Ion Battery Pack Configuration: The DIY 2kWh lithium-ion battery pack is built using My Sky Power's small lithium-ion cells. These cells are connected in a configuration of parallel and series connections to achieve the desired voltage and capacity. The 3S72P configuration means that three cells are connected in series, resulting in a total voltage of 12V, while 72 sets of parallel connections are made to increase the overall capacity.
Calculating the Total Battery Capacity: Each individual cell provides 9.25Wh of power. By multiplying this by the total number of cells in the battery pack (216 cells), we obtain a total capacity of 2kWh (2000Wh). This capacity allows the battery pack to store a significant amount of energy for various applications.
Ensuring Safety with Battery Management Systems (BMS): To protect the battery pack and enhance its safety features, two 100Amp BMS units are incorporated. The BMS monitors the battery pack's voltage, current, and temperature, ensuring that it operates within safe limits. It also safeguards against overcharging, over-discharging, and excessive current draw, preventing potential damage to the battery cells and ensuring a longer lifespan for the battery pack.
Power Output and Charging Capabilities: The DIY 2kWh lithium-ion battery pack can output a continuous current of 200Amps. This high current rating makes it suitable for applications that require substantial power, such as electric vehicles, off-grid solar systems, or marine applications. Additionally, the battery pack can be charged with a current of up to 100Amps, allowing for faster charging times.
Manufacturing and Supplier Information: The battery pack is made by Ali in My Sky Power, a trusted supplier of lithium-ion cells and battery components. My Sky Power is known for its quality products and adherence to safety standards. By sourcing the cells from a reputable supplier, you can ensure the reliability and performance of your DIY battery pack.

Conclusion: Building a DIY 2kWh lithium-ion battery pack for 12V DC applications can be a rewarding and cost-effective endeavor. By carefully configuring the cells in parallel and series connections, utilizing Battery Management Systems for protection, and sourcing high-quality components, you can create a reliable and powerful battery pack capable of delivering 2kWh of energy. This DIY project opens up possibilities for various applications, providing a sustainable and efficient power solution.