TE Circuit Protection, a business unit of TE Connectivity, today announced a new Metal Hybrid PPTC (MHP) device offering Smart Activation (SA) functionality. The MHP-SA device provides a resettable, cost-effective and space-saving alternative to typical methods of protecting high-power lithium battery and module applications. These include cordless power tools, e-scooters and light electric vehicles (LEVs) and standby power and energy storage systems (ESSs).
The new MHP-SA device helps provide overcharge protection in large multi-cell battery packs and modules in which circuit protection devices interface with electronics as part of a sophisticated battery management system. The MHP-SA device’s Smart Activation design feature accomplishes this via a third terminal signal line that enables external activation.
In a typical scenario, an IC monitors the battery system’s temperature, current and voltage and, if an abnormality is detected, it switches on a FET and activates the heater element (PPTC) of the MHP-SA device to heat the bimetal. The bimetal contacts then open and cut contact to the main line. The first in a series of planned devices, the new MHP-SA50-400-M5 device has a 50A/400VDC maximum rating and its hold current is 50A on the main line. The device can be activated electronically with as little as 3A via the signal line.
TE Connectivity
www.circuitprotection.com