Rechargeable Lithium-Ion (Li-ion) batteries are everywhere and, if not properly protected, every one of them can cause serious damage if an overcurrent fault condition occurs.
TE Circuit Protections Barry Brents explains how a PolySwitch PPTC resettable device are placed inside a battery cell or in parallel in a battery pack to protect lower current applications (smart phones, tablets, etc.) from external short circuits or heating events.
And for larger battery packs, Barry talks about how the MHP, a novel device that combines a PPTC and bimetallic circuit breaker in parallel, is a great answer for large battery pack, high current applications like (LEVs) and energy storage systems.
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