Why do battery protection boards fail?

Although battery protection boards are crucial, some problems can poorly impact their functions. Such problems are typically attributed to design flaws, component failures, and environmental factors. One of the most frequent causes of battery protection circuit failures is improper design.

What is the battery protection board?

The battery unit is a lithium-ion soft pack battery model AEC653440, rated voltage: 4.2V, rated capacity: 900mAh (from AEC). The battery protection board is responsible for the overcharge, overdischarge, and overcurrent protection of the battery, and has the thermistor to detect the battery temperature.

What happens if a battery protection circuit fails?

The failure of a battery protection circuit can have far-reaching consequences, impacting both the performance of the battery and, more critically, the safety of the device or vehicle that relies on it. One of the primary functions of a battery protection circuit is to prevent overcharging and overdischarging.

What happens if a protection circuit fails?

If the protection circuit fails to detect the short circuit or overcurrent, it can lead to catastrophic failure. This not only damages the battery but can also harm the connected devices or even cause electrical fires. Thermal runaway is one of the most dangerous outcomes of a malfunctioning protection circuit.

What is battery protection circuit?

Battery protection circuit is applied to protect the battery from overcharging, over-discharging, short circuits and other dangerous conditions to ensure the longest battery life for its use and to ensure battery safety.

What makes a good battery protection circuit?

Using high-quality components is essential to the longevity and reliability of any battery protection circuit. This includes selecting durable MOSFETs, accurate current and thermal sensors, and robust connectors.