Infineon High Voltage BMS Reference Design Brings Advanced Battery Modeling
Infineon Technologies AG has introduced a high-voltage battery management system (BMS) reference design, announced on October 27, 2026. This innovative solution brings advanced battery modeling, monitoring, and control capabilities directly to the Battery Management Unit (BMU), enabling the execution of computationally intensive battery models at the edge rather than solely relying on remote processing. This approach is designed to enhance battery performance and management directly within the vehicle.
The reference design integrates an AURIX™ TC4x microcontroller, which features a parallel processing unit (PPU). This PPU provides the necessary computing performance to execute advanced battery-management functions directly on the BMU. The complete solution combines three primary hardware components a Battery Management Unit, a Pack Monitoring Unit (PMU), and a Cell Monitoring Unit (CMU) along with a comprehensive software package, offering a coordinated platform for high-voltage BMS development.
A key differentiator of this design is the processing capability of the AURIX™ TC4x microcontroller's PPU. Infineon states that the PPU can deliver up to 30 times higher processing performance for workloads compared to a standard CPU. This significant computing capacity supports computationally intensive battery models, including machine learning, hybrid models, electrochemical models, digital twins, and equivalent circuit models, facilitating more detailed battery-state estimation and prediction.
These advanced modeling capabilities enable optimization of battery load profiles, charging strategies, cell utilization, and driving range. Infineon highlights potential benefits such as extending battery lifetime by up to 30 percent, enabling battery designs with up to 20 percent fewer cells, or supporting longer driving range with an unchanged battery configuration. Furthermore, the additional processing performance may allow charging times to be reduced by up to 20 percent in various application scenarios.
Source Link: Press Release
Specifications
| Product | BMU Microcontroller | PPU Performance | CMU Monitoring IC | CMU Channels | CMU Scalability | Potential Battery Lifetime Improvement | Potential Cell Reduction | Potential Charging Time Reduction |
|---|---|---|---|---|---|---|---|---|
| High-voltage BMS Reference Design | AURIX™ TC4x | Up to 30x CPU workload performance | TLE9018DQK | 18 | Up to 62 boards (daisy chain) | Up to 30% | Up to 20% | Up to 20% |
Key Features
- Advanced processing architecture: The BMU is based on an AURIX™ TC4x microcontroller incorporating a parallel processing unit (PPU), offering up to 30 times higher processing performance for workloads than a standard CPU.
- Integrated battery management platform: The reference design combines the BMU, Pack Monitoring Unit, and Cell Monitoring Unit with a comprehensive software package for high-voltage BMS development.
- Multiple communication interfaces: The BMU provides Ethernet, CAN, USB-C, and iso UART connectivity.
- Integrated power and control interfaces: The BMU includes vehicle and laboratory power-supply inputs, MOTIX™ contactor drivers, a high-voltage interlock, and EEPROM.
- Thermal-runaway detection: XENSIV™ pressure and gas sensors are integrated into the BMU reference design for thermal-runaway detection.
- Comprehensive battery-state estimation: Supports electrochemical impedance spectroscopy, open-circuit-voltage measurement, coulomb counting, Kalman filtering, equivalent circuit models, electrochemical models, digital twins, AI-based models, and other data-driven approaches.
- Battery parameter estimation and prediction: Estimates internal cell temperature, state of charge, state of health, state of power, state of safety, and identifies indicators of lithium plating.
- Reduced cloud-processing requirements: Executes advanced battery models directly in the vehicle, reducing data transfer to the cloud and potentially cloud-infrastructure requirements and processing latency.
- ASIL D-compliant pack monitoring: The PMU, based on the PSOC™ 4 HVPA SPM 1.0, provides ASIL D-compliant current sensing, high-voltage monitoring up to 1000 V, isolation-resistance measurement, and coulomb counting.
- PMU communication and protection interfaces: The PMU offers iso UART connectivity to TLE9012 and TLE9018 devices, an isolated CAN interface, SPI interfaces for pressure sensors, and a pyro-fuse interface.
- Multichannel cell monitoring and balancing: The CMU integrates the TLE9018DQK, an 18-channel lithium-ion battery monitoring and balancing IC compliant with ASIL D and ISO 26262, with ultra-low power consumption allowing direct supply from three to 18 cells.
- Scalable cell-monitoring architecture: Supports hardware cascading of up to 62 CMU boards in a daisy chain, with a 19-wire AFE connection and module-to-module current and power matching.
Applications
- High-voltage battery management: Intended for high-voltage BMS development and evaluation, combining battery control, pack monitoring, cell monitoring, and protection functions.
- Battery management during vehicle operation: Supports battery management while the vehicle is driving.
- Battery charging and fast charging: Optimizes charging strategies and manages batteries during conventional charging and fast charging.
- Battery management during parking: Supports battery-state estimation and prediction methods for managing the battery during vehicle parking.
- Cell balancing: Supports battery management during cell balancing, with an integrated 18-channel lithium-ion battery monitoring and balancing IC.
- Battery lifetime and cell-utilization optimization: Optimizes load profiles, charging strategies, and cell utilization to extend battery lifetime (up to 30%).
- Battery-state monitoring and lithium-plating identification: Estimates internal cell temperature, state of charge, state of health, state of power, state of safety, and identifies indicators of lithium plating.
- Thermal-runaway detection and protection: Uses integrated pressure and gas sensors for early thermal-runaway detection, enabling preventive or protective measures.
Avaliablity
Infineon’s high-voltage battery management system (BMS) reference design is available to order now. The solution integrates the AURIX™ TC4x microcontroller, Battery Management Unit (BMU), Pack Monitoring Unit (PMU), and Cell Monitoring Unit (CMU), along with a comprehensive software package for advanced battery modeling, monitoring, and protection.
