When a custom battery pack that includes multiple lithium-ion cells is designed, it is important to ensure that its features provide a consistent balance to cell voltages. This is essential for battery performance and its lifecycle. Cell balancing provides a comprehensive framework for designing a battery with a much larger capacity and achieving a higher state of charge (SOC). Let’s take a deeper look at cell balancing and battery life.
Cell balancing is the process of equalizing or normalizing the voltage and state of charge between cells when they are at full charge. No two cells are identical and have slightly different features, especially SOCs, self-discharge rate, capacity, etc. Most battery chargers detect whether the battery is fully charged by examining the voltage of the entire cell string.
Individual voltages in cells can vary, and they need to ensure they don’t exceed the limits of overvoltage protection. That said, weak cells tend to dish out higher voltage than other cells. The higher voltage results in capacity degradation, lowering the battery life. This is why cell balancing is so important when creating robust batteries for energy storage.
Cell balancing is typically categorized into two different sections:
This is pretty straightforward. The process involves discharging the cells through a dissipative bypass route that can be involved in an integrated circuit (IC). Passive cell balancing is ideal for low-cost applications.
Active cell balancing is a more advanced process that uses capacitive or inductive capabilities, which shuttles and transfers charge between battery cells. It is more efficient because energy is transferred where it is needed most instead of wasted. However, the process is a bit more expensive than passive balancing.
BMS also plays an important role in battery charging and optimal operations. They provide a safety mechanism to ensure batteries operate within their parameters. These systems are fundamental to ensure constant current is provided to the battery.
These are some critical functions a battery management system performs to ensure that your batteries run smoothly and seamlessly. It provides proper indications to the user regarding the battery’s state of charge and health so that proper steps can be taken to ensure its longevity and capacity.
Cells are fundamental to the smooth running of batteries, and as a manufacturer, you should invest in high-quality batteries that ensure the longevity and operational excellence of your product. Working with the right supplier is fundamental to getting your desired raw cells.
If you’re looking for a premium supplier who can provide world-class products, check out Ezeal. We supply high-quality Lithium-ion batteries online to national and international consumers. In addition, our LiFePO4 prismatic cells can be used in various applications, and we offer a money-back guarantee for any faulty or damaged products. Visit our website to learn more about our product range or place an order!
