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Infineon has introduced an orderable high-voltage battery management system reference design built around its AURIX TC4x microcontroller. The package includes a battery management unit, pack and cell monitoring units, and software; performance and battery-life figures cited by Infineon are potential benefits, not reported test results for every application.
Infineon Technologies has introduced an orderable high-voltage battery management system (BMS) reference design built around the AURIX TC4x microcontroller. The design combines a battery management unit (BMU), pack and cell monitoring units, and software for BMS development, with the BMU intended to run computationally intensive battery models directly on the control hardware.
The BMU uses the AURIX TC4x and its parallel processing unit, or PPU. Infineon says the PPU can provide up to 30 times the processing performance of a standard CPU. The added computing capacity is intended to support machine-learning, hybrid, electrochemical and equivalent-circuit models, as well as digital twins. The supplied description does not identify the CPU used as the performance comparison baseline.
According to Infineon, battery models could help optimize load profiles and extend battery life by up to 30% in various application scenarios. The company also says the modeling may allow battery designs with up to 20% fewer cells, or greater driving range with the same battery configuration, and that increased processing performance may reduce charging times by up to 20%. Those are company-stated potential outcomes; the announcement does not provide test conditions, vehicle-level results or a comparison methodology for the figures.
The BMU includes Ethernet, CAN, USB-C and isoUART connectivity, power inputs for vehicle and laboratory use, MOTIX contactor drivers, EEPROM storage and a high-voltage interlock. It also incorporates XENSIV pressure and gas sensors for thermal-runaway detection. The design supports several approaches to estimating battery conditions, including electrochemical impedance spectroscopy, open-circuit-voltage measurement, coulomb counting, Kalman filtering and AI-based models.
Onboard Models Could Change BMS Workloads
Running more demanding battery models on the BMU itself could give developers a platform to test estimation and prediction methods without relying solely on simpler calculations or off-board computing. Infineon says these methods can estimate internal cell temperature, state of charge, state of health, state of power and state of safety, and identify indicators of lithium plating. The reference design is relevant to engineers evaluating how those functions might be integrated into high-voltage battery systems.
The stated benefits—potentially longer battery life, fewer cells, more range or faster charging—could affect pack design and vehicle performance if validated in specific applications. The source does not establish that the design delivers those improvements in a production vehicle. Its immediate significance is as a development platform bringing processing, sensing and monitoring hardware together, rather than a confirmed change to batteries already in use.
Infineon also describes earlier detection of conditions associated with thermal runaway as a way to give a BMS more time to initiate preventive or protective measures. That is a safety-related capability, but the announcement does not report a certification or test result for the complete reference design. Component-level safety specifications in the design should not be read as proof that every system built from it meets a particular vehicle-level safety requirement.
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Three Units Form the Reference Platform
The design is divided among the BMU, pack monitoring unit (PMU) and cell monitoring unit (CMU). The PMU is based on Infineon’s PSoC 4 HVPA SPM 1.0 and is designed to meet ASIL D. Its stated pack-level functions include current sensing, voltage monitoring up to 1,000 volts, isolation-resistance measurement and coulomb counting. It also has isoUART links to TLE9012 and TLE9018 devices, an isolated CAN interface to the host microcontroller and a pyro-fuse interface.
The CMU uses the TLE9018DQK, an 18-channel lithium-ion battery monitoring and balancing IC designed to meet ASIL D and ISO 26262. Infineon says it can be powered directly from three to 18 cells, while hardware cascading supports as many as 62 boards in a daisy chain. The company’s error-compensation approach enables a 19-wire analog front-end connection intended to reduce cell-level wiring. These details describe the reference design’s components and architecture; they do not specify a finished vehicle battery configuration.
The announcement was reported by Charged EVs on October 30, 2026, citing Infineon Technologies. The reference design is available to order, according to the report. It is presented as a resource for BMS development, including laboratory work, rather than as a production-ready battery pack.
“The AURIX TC4x parallel processing unit can deliver up to 30 times the processing performance of a standard CPU.”
— Infineon Technologies, as reported by Charged EVs
Performance Claims Need Test Conditions
The announcement does not provide independent test data demonstrating the claimed battery-life, cell-count, range or charging-time outcomes. It also does not give the application scenarios, operating assumptions, comparison baselines or measurement methods behind the percentages. The CPU baseline for the stated up-to-30-times processing comparison is not identified in the source report.
It is also unclear which battery chemistries, pack configurations or vehicle programs the reference design has been tested with, and whether Infineon has customers using it in production development. The report describes safety-related features and component design targets, but does not establish certification of the complete system or report validation against a specific vehicle’s safety requirements.
Developers Can Order the Design
Infineon says the reference design is available to order, giving BMS developers a platform to evaluate its hardware and software. The source report does not list pricing, delivery timing, software contents, documentation availability or ordering terms.
Further details that would help assess the design include test results for the performance claims, supported battery configurations, and validation or certification information for the assembled system. Until those details are available, the reported percentage gains should be treated as Infineon’s projections, not guaranteed outcomes for vehicles or battery packs.
Key Questions
What did Infineon announce?
Infineon introduced an orderable high-voltage BMS reference design built around an AURIX TC4x microcontroller. It includes a BMU, pack and cell monitoring units, and software for BMS development.
What is the AURIX TC4x used for in the design?
The AURIX TC4x powers the BMU, whose parallel processing unit is intended to run computationally intensive battery models. Infineon lists machine-learning, electrochemical, hybrid and equivalent-circuit models, as well as digital twins.
Are the claimed battery-life and charging improvements confirmed?
No independent results are provided in the source report. Infineon cites potential gains of up to 30% in battery life and up to 20% shorter charging times, but the report does not state the test conditions or comparison baselines.
What voltage and cell-monitoring capabilities are described?
The PMU is specified for pack monitoring up to 1,000 volts. The CMU uses an 18-channel monitoring and balancing IC and supports hardware cascading of up to 62 boards, according to Infineon.
Can developers order the reference design now?
The report says the reference design is available to order. It does not give pricing, shipping dates or ordering conditions.
Source: chargedevs.com
