NXP Semiconductors has rolled out a next-generation battery cell controller IC designed for lifetime performance and battery pack safety in electric vehicles (EVs) and energy storage systems.
Called the MC33774, the IC has a measurement accuracy of 0.8 mV cell and maximum cell balancing capability over a wide temperature range. The device has an 18-channel analog front-end device that comes with ASIL D support for safety in voltage lithium-ion batteries.
Lithium-ion batteries are commonly used in EVs due to their high energy density, low maintenance, low self-discharge and ability to sustain thousands of charge/discharge cycles. They make up about 30% to 40% of the total cost of an EV. Because of this, it is critical to estimate the battery pack’s state of charge at any given temperature for the life of the battery.
NXP said the MC33774 is designed to deliver lifetime accurate cell measurement data in extreme temperatures ranging from -40° C to 125° C.
The chip is based on NXP’s SmartMOS silicon-on-isolator technology that helps ensure lifetime performance with both nickel manganese cobalt (NCM) and lithium iron phosphate (LFP) cell chemistries.
