What is a lithium-ion battery protection board?
A lithium-ion battery protection board, as the name suggests, is used to protect lithium-ion batteries. It prevents problems such as overcharging, over-discharging, overcurrent, and short circuits. Some boards also include smart chips to record battery usage and status.
A lithium-ion battery pack protection board provides charge and discharge protection for a series-connected lithium-ion battery pack. It detects overvoltage, undervoltage, overcurrent, short circuit, and overtemperature conditions in each individual cell, protecting and extending battery life. For example, when a battery is discharging, the protection board protects it from over-discharge and damage. This adds an extra layer of protection to the lithium-ion battery, making the battery pack safer and extending its lifespan. Without a protection board, battery life would be affected, and in severe cases, dangerous situations could occur.
Can lithium-ion batteries be charged without a protection board?
The reason why some people believe that lithium-ion batteries don't need protection boards is largely due to the emergence of lithium iron phosphate (LFP) batteries. Because there were claims that LFP batteries are not afraid of overcharging or over-discharging, the argument arose that lithium-ion batteries can function without protection boards.
However, to date, no manufacturer has publicly declared that it does not use lithium-ion battery protection boards. Since this issue is controversial, let's first return to the protection board itself, its meaning and purpose, in order to gain our own understanding of whether lithium-ion batteries can function without it.
A lithium-ion battery protection board, as the name suggests, is used to protect lithium-ion batteries. Its functions include protecting the battery from over-discharge, over-charge, and over-current, as well as providing output short-circuit protection.
People who believe lithium-ion batteries don't need protection boards think that lithium-ion batteries will fail regardless of whether they have a protection board or not, and that the protection board will completely discharge lithium-ion batteries that haven't been used for a long time. This idea clearly stems from a lack of understanding of the purpose of protection boards. The purpose of a protection board for lithium-ion batteries is to provide an extra layer of protection; its sole purpose is to ensure the safety of lithium-ion batteries and extend their lifespan. Without a protection board, not only is the lifespan difficult to guarantee, but it is also extremely dangerous.
