Battery Cell Controller for Next Generation Electric Vehicles


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Battery Cell Controller for Next Generation Electric Vehicles

A new Battery Cell Controller portfolio was released by NXP, suitable for a wide range of automotive Battery Management Systems.  Designed to deliver industry leading measurement accuracy and flexible embedded functional safety mechanisms.  The new Battery Cell Controllers combined with NXP’s comprehensive portfolio of world-class automotive microcontrollers (MCUs), power management system basis chips (SBCs), and communication transceivers provide readily useable reference design platforms for controlling high-capacity energy storage in modern Electric Vehicles.


The platforms are designed to help carmakers deliver the next generation of hybrid and electric vehicles with greater speed and less development risk.NXP’s new Battery Cell Controller ICs pair with NXP’s full portfolio of functional safety System Basis Chips and Microcontrollers to enable scalable Battery Management Solutions based on their industry leading precision, robust communication and advanced functional safety up to ASIL-D. The new Battery Cell Controllers (MC33771B and MC33772B) advance the state-of-the-art in measurement capability and functional integration.


The features include:

  • Converts cell measurements of a 96-cell high voltage battery within < 546 us, and communicate data to the pack controller within 4.1ms with typical accuracies of +/-0.8mV after soldering over voltage, temperature, and lifetime.
  • Enables highly accurate cell impedance calculations for state-of-health monitoring using unique synchronized current sensing.
  • Integrates 0.8 Ohm MOSFETs with dedicated timers for each cell for effective and simultaneous charge-balancing of each cell
  • Provides embedded functional safety mechanisms and diagnostics to effectively support highest functional safety goals.

The samples of new Battery Cell Controllers (MC33771B and MC33772B) are available and can be ordered from NXP official website and distributors.

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