Batteries are an integral part of modern life, powering everything from our mobile devices to electric
 cars. However, their operation and safety are often taken for granted. One critical safety feature of
 batteries that is often overlooked is the tab. In this article, we will explore the importance of tabs in
 preventing cell failure and increasing battery safety.

Overcharging a battery can cause it to catch fire and destroy homes and businesses. This is due to
 the increased generation of heat which can cause the electrolyte to degrade and produce gas,
 making the pouch swell. The adhesion strength of the polymer sealant to the metal tab is critical in
containing the pressurised electrolyte. If the tab cannot withstand the forces imparted on it by the
 pressurised pouch, then it will leak flammable electrolyte that may be ignited by the increased 
temperature.

To ensure that tabs can withstand the required forces, extensive testing is performed to characterise 
the peel strength of the polymer sealant component of the tab design. At ABM, the peel strength of
 the tab is beyond the threshold value that a cell manufacturer will specify. ABM strives to provide
 higher levels of safety for exceptional instances of cell operation. Part of their research and
 development efforts focus on achieving peel results beyond industry standards to increase battery
 safety and longevity.

Swelling of batteries can occur due to various reasons such as overcharging, overheating, battery
 aging, or exposure to moisture. In all cases, the swelling increases the force incident at the weakest
 point of the pouch cell, the tab. Therefore, it is critical that the tab seal is strong enough to
 withstand the forces introduced by swelling and contain the dangerous electrolyte contents.
 Overheating a lithium-ion pouch cell can also have severe consequences such as capacity loss,
 swelling, and thermal runaway, where the battery releases large amounts of heat leading to swelling 
and fires. Containing the gases and dissipating heat away from the cell is a function of a well-
performing tab, aiding in the prevention of thermal runaway.

ABM aims to produce tabs that are beyond the minimum peel strength required by most cell
 manufacturers. Their tabs are made of highly thermally conductive materials that dissipate thermal
 energy introduced by overcharging, exposure to high temperatures, and thermal runaway.
 In conclusion, tabs are a critical safety feature in batteries that prevent cell failure and increase 
battery safety. ABM’s extensive research and development efforts focus on producing tabs that are
 beyond industry standards to increase battery safety and longevity. By understanding the 
importance of tabs, we can ensure that batteries are operated safely and efficiently, minimising the
 risk of catastrophic failure.

To learn more about ABM and their battery tabs, visit www.avocetbattery.com