What s mean Protection Circuits 2 ?

What's mean Protection Circuits (2)?

What's mean Protection Circuits (2)?
Commercial Li-ion packs contain one of the most exact protection circuits in the
href="http://good-battery.com">battery industry. These circuits assure safety under all

circumstances when in the hands of the public. Typically, a Field Effect Transistor (FET)

opens if the charge voltage of any cell reaches 4.30V and a fuse activates if the cell

temperature approaches 90 гC (194 гF). In addition, a disconnect switch in each cell

permanently interrupts the