How Power Banks Are Made: The fires involving power banks have reignited a debate about their safety. Meanwhile, it's important to understand how power banks are made and what could cause a fire.

How Power Bank Is Made: How is a power bank made?

How Power Bank Is Made: A power bank caught fire on an Indigo flight at Chandigarh airport . Fortunately, the flight had already landed by then, and no one was injured. Due to these incidents, the use of power banks on flights has been banned. Following this incident in Chandigarh, the issue of power banks and their safety has once again come under discussion. Today, we will explore how a power bank is made and the various factors that can cause a fire.

How is a power bank made?

A power bank can be thought of as a battery wrapped in a plastic or metal cover. The top layer is the positive side, while the bottom layer is the negative side. Between them is a middle film, which is paper-thin and acts as a divider between the negative and positive sides. Inside, a flammable liquid (electrolyte) is filled, which moves electricity. This pack is tightly packed under pressure. When it's charged, the ions move from one side to the other through the liquid and return to their original position as soon as it's unplugged. This happens very quickly.

What are the reasons for fire in a power bank?

Power banks or batteries don't suddenly explode. First, something goes wrong, and then the explosion occurs. There are several reasons why a power bank can catch fire:

Heat- If the power bank is kept in a hot place or it overheats due to use, then there is a risk of it exploding.
Damage due to a fall- If the power bank falls hard, then the divider fitted in it can get damaged, which can cause disturbance in the chemical reaction, which can lead to a fire. 
Bad charger- Bad or low quality chargers can also cause a fire. Due to such chargers, the voltage cannot be regulated and gradually they can damage the divider fitted in the power bank. 
Old battery- If the power bank or battery is too old, then gas is created in it. Due to this, the power banks swell, and there is a risk of them catching fire when used.

When the divider is damaged or otherwise defective, its negative and positive sides can touch. This causes electricity to travel the wrong way, heating the electrolytes. This causes pressure to build up, and when the gas tries to escape, it can ignite.