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What is Cell Balancing?

Cell balancing is done to increase the battery’s performance, security, and dependability while also extending its lifespan. Let us dive deeper to understand the concepts of cell balancing that are widely used in EVs.

Given below are the following topics we are going to discuss:

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What do you understand from Cell Balancing?

Cell balancing is an essential procedure that guarantees the best performance and security of rechargeable battery packs. A battery pack is often made up of several individual cells, and over time, these cells may discharge or charge at varying rates due to numerous factors such as variations in internal resistance, temperature, or manufacturing variability.

As a result, certain cells can experience overcharging while others might experience undercharging, which can result in decreased battery capacity, power output, and longevity.

Battery management systems (BMS), which are used in electric vehicles, renewable energy storage systems, and other applications that rely on rechargeable batteries, are fundamentally dependent on cell balance. The performance, safety, and lifetime of the battery are maximized by a well-designed BMS, which makes sure that each cell in the battery pack is at an ideal SOC level.

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Need for Cell Balancing

Cell balancing is a crucial step in ensuring the best performance and durability of battery packs. Over time, batteries can become imbalanced, with some cells holding more charge than others, resulting in a reduction in capacity and a reduction in the total battery life.

A battery can suffer irreparable harm and lose performance if it is overcharged or over-discharged. By ensuring that each cell in the battery pack is charged and discharged to the same amount, cell balancing helps in the prevention of these problems.

In addition to improve performance and ensuring the safety of the battery pack, this increases battery life. In every application that demands great performance and dependability from battery packs, cell balancing is therefore a crucial step.

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How Cell Balancing Works?

For battery packs to operate at their best and last as long as possible, cell balancing is a crucial operation. Cell balancing helps in transferring the charge across the cells in a battery pack such that they are all at the same level of charge.

Cell balancing may be done in a variety of ways, including passive, active, and hybrid balance. The simplest way of balancing is passive, which includes adding a resistor to the circuit to drain the overcharged cell’s extra charge.

Contrarily, active balancing employs a circuit to transfer energy from the overcharged cell to the undercharged cell. To obtain the best performance, hybrid balancing blends passive and active balancing techniques.

Types of Cell Balancing

Let us now see the three types of cell balancing that are commonly used in electric vehicles:

Types of Cell Balancing

Applications of Cell Balancing

Here are some of the most common applications of cell balancing that are commonly used in real life:

Applications of Cell Balancing

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Cell balancing is critical in any application that relies on battery packs for power as it helps to ensure that the battery pack provides optimal performance, longevity, and safety. The value of cell balancing is only going to increase in the future with the rising need for battery-powered systems and devices.

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