Automotive 12 V to 24 V battery management system (BMS)
Accurately monitors, protects, and optimizes electric vehicle (EV) battery performance, revolutionizing your driving experience and energy efficiency
Infineon’s 12 V to 24 V BMS accurately monitors, protects, and optimizes battery performance. This automotive battery management system features low-power standby modes for diagnostics, monitoring SOC, SOE, SOH, SOP, SOS, temperature, cell voltages, and currents (including quiescent currents) of cells and the vehicle.
Click the block diagram to check Infineon's highly integrated and space-saving offers, including supply IC, microcontroller, monitoring IC, balancing IC, pressure sensor, gate driver, power MOSFET, and transceivers.
Check out more details on Battery Management System (BMS)
Monitor, protect & optimize 12 V - 24 V electric vehicle (EV) battery
- Cell monitoring & balancing: Diagnose cell voltages & temperatures, balance cell characteristics, and communicate with the main controller using low-power housekeeping.
- Current sensing & coulomb counting: Measure SOC accurately and trigger battery disconnection with fast OCD using coulomb counting.
- Battery controlling: Calculate SoC, SoH, SoP, and SoS, communicate with the domain controller, and perform housekeeping and firmware updates.
- Battery passport & event logging: Log vital parameters, track malfunctions, support warranties clarification, and enable 'pay-per-use' models. Enhance battery performance and proactively condition it.
- Battery pack monitoring: Detect thermal runaway, monitor battery disconnection, isolation, and overcurrent. Trigger disconnection units when necessary.
- Battery disconnection & protection: Ensure EV safety during parking, charging, and discharging. Disconnect from charger and monitor disconnection state when triggered by failures or vehicle being off.
- Isolated communication: Transmit cell information reliably between high-voltage and low-voltage domains using wired (Iso-UART) and wireless (low-power Bluetooth) topologies.
Enable faster time to market with complete BMS chipset
Infineon offers a complete and scalable BMS chipset, production-ready complex device drivers with integrated safety libraries, and supports up to ASIL-D safety standards. The interoperability and flexibility help you to reduce design effort and speed up time to market.
Applications
- Vehicles: Light passenger vehicles, electric two wheelers, electric three wheelers, commercial and agricultural vehicles (CAV)
- Propulsion systems: All types of propulsion systems
Ensure battery availability and diagnosis with ultra-low standby power
Low-voltage 12 V and 24 V batteries are important for ensuring the power availability of the low-voltage bus in passenger and commercial vehicles. The key function of the low-voltage availability battery is to:
- Stabilize the low-voltage bus by ensuring the constant 12 V and 24 V supply during different operation modes.
- Ensure the availability of the low-voltage bus for safety-critical functions, in case of any loss of the main energy source (e.g., engine or traction battery). Such safety-critical operations included steering, braking, door locking or unlocking, and many others.
Prevent damaging from high cycle frequency and low recharge currents
The low-voltage BMS is especially important for xEVs, because of the following main characteristics:
High cycle frequency: Low-voltage battery is drained much more frequently on an EV than on an internal combustion engine (ICE) vehicle because it's always on to keep EV controlled remotely, maintain the charging of high-voltage (HV) battery and BMS communications.
Low recharge currents: The battery is not charged as frequently as on an ICE in order to save power for the HV battery, which allows for a longer range.
Best-in-class robustness with compact design and lowest PPM rates
Infineon's highly integrated products significantly decrease the footprint and help the customers to reduce costs by minimizing printed circuit board size. Besides, Infineon's Zero Defect Mindset is reflected in the lowest PPM rates in the market, and significantly reduces vehicle downtime and returns.
- Know how a typical battery protection switch works and the importance of MOSFET avalanche robustness
- Identify the best-in-class Infineon offerings of demo boards, MOSFETs and gate drivers
- Get an overview of the main features of this flexible EiceDRIVER™ device
- Understand its different integrated protection mechanisms
