Automotive battery management system

Accelerate automotive battery management system design with Infineon's complete BMS chipset — ASIL-D safety and 12 V–1200 V scalability.

nobutton

About

Automotive BMS: Monitor, protect & optimize EV battery performance

Infineon's automotive battery management system solutions monitor, protect, and optimize electric vehicle (EV) battery performance across all key BMS subsystems:

  • Cell monitoring unit (CMU): Measures cell voltages and temperatures, balances cells, and detects over/undertemperature and voltage events.  Ideal fit: Battery Management ICs 
  • Battery management unit (BMU): Calculates SoC, SoH, SoP, and SoS battery states, communicates with the domain controller, and performs firmware updates. Ideal fit: AURIX™ TC4x 
  • Pack monitoring unit (PMU): Accurately measures current for coulomb counting and over-current detection (OCD); detects thermal runaway and monitors isolation. Ideal fit: Smart Battery Pack Monitor PSOC™ 4 HVPA-SPM 1.0
  • Battery disconnect unit (BDU): Ensures EV safety during parking, charging, and discharging; disconnects from charger on fault or vehicle-off. Ideal fit: CoolSiC
  • Isolated communication: Reliably transmits cell data between high- and low-voltage domains via wired (Iso-UART, TLE9015DQU) and wireless (AIROC™ BLE) topologies. Ideal fit: iso UART or Airoc(TM) BLE

Complete automotive BMS chipset for fast time-to-market

Accelerate time-to-market with Infineon's complete automotive BMS chipset — trusted by engineers worldwide and rigorously tested for the broadest range of vehicle applications.

Our BMS platform covers 12 V to 24 V, 48 V to 72 V, and high-voltage architectures including 400 V, 800 V, and 1200 V battery systems. We offer a scalable automotive battery management system chipset with production-ready complex device drivers, integrated safety libraries, and support for safety standards up to ASIL-D (ISO 26262).

Interoperability and flexibility reduce design effort and speed time-to-market across:

  • Passenger cars
  • Commercial vehicles (construction, agricultural, truck, bus)
  • Light electric vehicles (electric rickshaw, electric motorcycle, electric motor scooter, e-bikes, electric kick scooter)
  • Battery energy storage systems (BESS)
  • Robotics

Best-in-class robustness & compact design for automotive BMS

Infineon's highly integrated automotive BMS products deliver best-in-class robustness and compact form factors, helping engineers reduce system costs by minimizing printed circuit board (PCB) size.

Our zero-defect mindset is reflected in the lowest PPM rates in the market, significantly reducing vehicle downtime and warranty returns. The commitment to quality means rigorous testing processes ensure the highest standards of performance and reliability across the full operating temperature range.

All automotive BMS products are available up to ASIL-D (ISO 26262) compliance, giving you the right solution for even the most demanding automotive safety requirements.

Automotive-grade BMS ICs — ISO 26262 ASIL-D
CoolSiC™ power devices for EV BDU

Ready for the future: What's next in automotive BMS

Infineon's automotive battery management system is designed to be future-ready today, addressing next-generation BMS requirements:

Battery passport: Log vital parameters, track malfunctions, support warranties, and enable battery second-life models. Proactively condition battery performance to maximize range and extend service life.

AI in BMS: AI-driven BMS algorithms and digital twins provide deep cell-level visibility — monitoring temperature, electrochemical state, SoC, and SoH in real time. This empowers pack makers to increase vehicle range by up to 10%, reduce charging time by up to 20%, and extend battery life, powered by AURIX™ TC4x.

AURIX™ TC4x for AI-enabled BMS

Automotive BMS: Monitor, protect & optimize EV battery performance

Infineon's automotive battery management system solutions monitor, protect, and optimize electric vehicle (EV) battery performance across all key BMS subsystems:

  • Cell monitoring unit (CMU): Measures cell voltages and temperatures, balances cells, and detects over/undertemperature and voltage events.  Ideal fit: Battery Management ICs 
  • Battery management unit (BMU): Calculates SoC, SoH, SoP, and SoS battery states, communicates with the domain controller, and performs firmware updates. Ideal fit: AURIX™ TC4x 
  • Pack monitoring unit (PMU): Accurately measures current for coulomb counting and over-current detection (OCD); detects thermal runaway and monitors isolation. Ideal fit: Smart Battery Pack Monitor PSOC™ 4 HVPA-SPM 1.0
  • Battery disconnect unit (BDU): Ensures EV safety during parking, charging, and discharging; disconnects from charger on fault or vehicle-off. Ideal fit: CoolSiC
  • Isolated communication: Reliably transmits cell data between high- and low-voltage domains via wired (Iso-UART, TLE9015DQU) and wireless (AIROC™ BLE) topologies. Ideal fit: iso UART or Airoc(TM) BLE

Complete automotive BMS chipset for fast time-to-market

Accelerate time-to-market with Infineon's complete automotive BMS chipset — trusted by engineers worldwide and rigorously tested for the broadest range of vehicle applications.

Our BMS platform covers 12 V to 24 V, 48 V to 72 V, and high-voltage architectures including 400 V, 800 V, and 1200 V battery systems. We offer a scalable automotive battery management system chipset with production-ready complex device drivers, integrated safety libraries, and support for safety standards up to ASIL-D (ISO 26262).

Interoperability and flexibility reduce design effort and speed time-to-market across:

  • Passenger cars
  • Commercial vehicles (construction, agricultural, truck, bus)
  • Light electric vehicles (electric rickshaw, electric motorcycle, electric motor scooter, e-bikes, electric kick scooter)
  • Battery energy storage systems (BESS)
  • Robotics

Best-in-class robustness & compact design for automotive BMS

Infineon's highly integrated automotive BMS products deliver best-in-class robustness and compact form factors, helping engineers reduce system costs by minimizing printed circuit board (PCB) size.

Our zero-defect mindset is reflected in the lowest PPM rates in the market, significantly reducing vehicle downtime and warranty returns. The commitment to quality means rigorous testing processes ensure the highest standards of performance and reliability across the full operating temperature range.

All automotive BMS products are available up to ASIL-D (ISO 26262) compliance, giving you the right solution for even the most demanding automotive safety requirements.

Automotive-grade BMS ICs — ISO 26262 ASIL-D
CoolSiC™ power devices for EV BDU

Ready for the future: What's next in automotive BMS

Infineon's automotive battery management system is designed to be future-ready today, addressing next-generation BMS requirements:

Battery passport: Log vital parameters, track malfunctions, support warranties, and enable battery second-life models. Proactively condition battery performance to maximize range and extend service life.

AI in BMS: AI-driven BMS algorithms and digital twins provide deep cell-level visibility — monitoring temperature, electrochemical state, SoC, and SoH in real time. This empowers pack makers to increase vehicle range by up to 10%, reduce charging time by up to 20%, and extend battery life, powered by AURIX™ TC4x.

AURIX™ TC4x for AI-enabled BMS

Block diagram

Documents