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Infineon has introduced an orderable high-voltage battery management system reference design built around its AURIX TC4x microcontroller. The design combines a battery management unit with pack and cell monitoring units, and Infineon says its added processing capacity can support advanced battery models; the reported lifetime, charging and cell-count benefits are company estimates, not independently verified results.
Infineon Technologies has introduced a high-voltage battery management system reference design built around its AURIX TC4x microcontroller, combining a computing-focused battery management unit with pack- and cell-monitoring units and software for BMS development. The design is aimed at engineers developing electric-vehicle battery systems, and gives them a platform for running more computationally intensive battery models directly on the battery management unit.
The battery management unit (BMU) uses the AURIX TC4x and its parallel processing unit, or PPU. Infineon says the PPU can deliver up to 30 times the processing performance of a standard CPU. The company says that capacity can support machine-learning, hybrid, electrochemical and equivalent-circuit models, as well as digital twins. The source report does not specify the CPU used as the comparison or provide test conditions for the performance figure.
Infineon says the modeling capability could enable optimized battery load profiles that extend battery lifetime by up to 30% in various application scenarios. It also says the BMU could support battery designs with up to 20% fewer cells, or provide longer driving range with the same battery configuration. The company puts the potential reduction in charging time at up to 20%. These are company-reported potential benefits; the supplied report does not identify the scenarios, baselines or independent test results behind them.
The BMU includes Ethernet, CAN, USB-C and isoUART connections, vehicle and laboratory power-supply inputs, MOTIX contactor drivers, EEPROM, a high-voltage interlock, and XENSIV pressure and gas sensors intended to help detect thermal runaway. The reference package also includes software for BMS development. Infineon says the BMU can use methods including electrochemical impedance spectroscopy, open-circuit-voltage measurement, coulomb counting, Kalman filtering and AI-based models to estimate battery conditions.
More Computing at the Battery Pack
Battery management systems monitor pack and cell conditions and inform control decisions, including how a battery is charged and discharged. Running more detailed models on the BMU could give developers additional ways to estimate state of charge, health, power and safety, along with internal cell temperature and indicators of lithium plating. Infineon says earlier identification of conditions associated with thermal runaway can give a BMS more time to start preventive or protective measures.
The potential commercial implications depend on whether the reported benefits hold under particular vehicle, cell and operating conditions. If fewer cells, longer range, longer service life or quicker charging can be achieved in a given application, those results could affect battery cost, performance and system design. The announcement, however, describes a reference design for development, not a demonstrated production battery or a verified improvement across EVs.
For engineering teams, the practical value is the integration of a high-performance controller with complementary monitoring hardware and interfaces. A reference design can provide a starting point for evaluating components and building a BMS, while teams still need to validate performance, safety and compatibility against their own battery and vehicle requirements.
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Three Units Form the Reference Design
The reference design spans the BMU and two monitoring layers. The pack monitoring unit (PMU) is based on Infineon’s PSOC 4 HVPA SPM 1.0 and is designed to meet ASIL D, the highest Automotive Safety Integrity Level in the ISO 26262 framework. Its stated functions include current sensing, high-voltage monitoring up to 1,000 volts, isolation-resistance measurement and coulomb counting. Connections include isoUART links to TLE9012 and TLE9018 devices, isolated CAN to the host microcontroller and a pyro-fuse interface.
The cell monitoring unit (CMU) uses the TLE9018DQK, an 18-channel lithium-ion battery monitoring and balancing IC that Infineon says is designed to meet ASIL D and ISO 26262. The IC can be powered directly from three to 18 cells, and hardware cascading supports up to 62 boards in a daisy chain. Infineon’s error-compensation approach allows a 19-wire analog front-end connection intended to reduce cell-level wiring. Those component and design specifications describe the platform; they do not, on their own, establish that a finished vehicle system meets all applicable safety requirements.
“The PPU can deliver up to 30 times the processing performance of a standard CPU.”
— Infineon, as reported by Charged EVs
Performance Claims Need Test Conditions
The announcement does not give the detailed benchmarks behind the 30-times processing comparison, including the standard CPU used as a baseline, workload or power conditions. It also does not identify the battery chemistries, pack configurations or operating scenarios used to estimate potential lifetime, cell-count, range and charging improvements. The stated percentages should be read as Infineon’s projected outcomes, not independently established results.
The source report does not specify pricing, shipping schedules, the exact contents or licensing of the software package, or which vehicle programs may use the design. It also does not describe validation results for a complete system. The PMU and CMU safety standards cited in the report are component or design specifications; the final safety case will depend on how customers integrate and validate the full BMS.
Evaluation and System Validation
Infineon says the reference design is available to order. The next step for interested developers is to obtain the design and assess its hardware, software and interfaces against their battery architecture. Any claims about improved lifetime, charging speed, range or reduced cell count will need to be tested under defined application conditions.
No customer deployment, production schedule or further validation milestone is included in the report. It remains unclear when the design might appear in a commercial vehicle program, or whether Infineon will publish additional benchmarks and test methods for its performance estimates.
Key Questions
What did Infineon announce?
Infineon introduced an orderable high-voltage BMS reference design built around the AURIX TC4x. It includes a battery management unit, pack and cell monitoring units, and software for BMS development.
What does the AURIX TC4x do in the design?
The TC4x serves as the BMU controller. Its parallel processing unit is intended to handle computationally intensive battery models, including machine-learning and electrochemical approaches.
Are the battery-life and charging improvements verified?
The supplied report attributes estimates of up to 30% longer battery life and up to 20% shorter charging times to Infineon. It does not provide independent test results or enough detail to establish those outcomes across applications.
What voltage and cell-monitoring capabilities are described?
The PMU is specified for high-voltage monitoring up to 1,000 volts. The CMU uses an 18-channel monitoring and balancing IC that can be powered from three to 18 cells, with hardware cascading for up to 62 boards.
When can developers get the reference design?
The source report says the reference design is available to order. It does not provide pricing, shipping timing or further details about the software package.
Source: chargedevs.com
