AI-Powered Cloud-connected battery management system for EVs
AI-powered digital twin models in the cloud aim to improve EVs battery range, efficiency, safety, and lifetime and herald multiple new applications.
NXP Semiconductors has developed a platform to connect its high-voltage battery management system (HVBMS) through its S32G GoldBox vehicle networking reference design to the cloud to leverage an artificial intelligence (AI) powered battery digital twin.
By utilising Electra Vehicles, EVE-Ai 360 Adaptive Controls technology, NXP unleashes the power of digital twin models in the cloud to better predict and control the physical BMS in real time, to improve battery performance, battery state of health of up to 12% and enable multiple new applications, such as EV fleet management. NXP will showcase a demo of the solution at this year’s electronica in Munich.
Why it matters
As batteries continue to be the costliest element in an electric vehicle (EV), AI-powered digital twin cloud services have a high potential to improve estimations of the battery’s state of health (SOH) and state of charge (SOC) for improved efficiency, lifetime and cost. Battery digital twins adapt to ongoing changes in battery health due to operating conditions and provide updated figures back to the BMS for continuously improving control decisions.
Carmakers can use the technology to provide driver insights, such as range and speed recommendations. In addition, adaptive battery control can improve the battery’s performance and safely extend its lifespan, reducing warranty costs for the carmaker.
Another potential application is EV fleet management, providing fleet operators with invaluable usage insights, such as vehicle charging times and battery predictive diagnostics. Battery care centres can also use this in-depth information to reduce downtimes with rapid diagnostics, and EV charging station operators can effectively optimise their charging service and energy efficiency.
As the EV market grows, so will the supply of second-life batteries. Although they may have reached the end of their ‘automotive life’, these batteries have a significant residual capacity of up to 80%. Tapping into that remaining useful battery life (RUL) in energy storage systems (ESS) for homes has the potential to reduce homeowners’ energy bills.
The AI-powered battery digital twin solution with Electra Vehicles offers a performance advantage thanks to highly accurate sensors, real-time closed-loop control of the BMS and network connectivity combined with predictive algorithms. The solution comprises three elements.
NXP’s S32K3-based HVBMS Reference Design offers high precision and accuracy to extend battery life safely. Having precise measurements of the battery’s SOH and SOC leverages the full potential of the battery and thus maximises driving range with accurate diagnostics.
The second element is NXP’s S32G-based vehicle networking processing solutions. NXP GoldBox offers safe high-performance computing capacity and real-time network performance with secure cloud connectivity for data-driven cloud-based automotive services. NXP is collaborating with Electra Vehicles, a specialist in AI-based onboard battery controls, data analytics and design, for the third and final element of the digital twin solution, which is to implement its EVE-A adaptive digital twin and connect its electrification solutions to the cloud.
“NXP's contribution to the digital twin technology lies in the access to accurate sensor data, real-time closed-loop control of the BMS, high-performance in-vehicle processing and secure connectivity to the cloud for services and over-the-air (OTA) updates. By integrating Electra’s EVE-Ai architecture, we address the two main challenges associated with the digital twin approach,” said Dr. Andreas Schlapka, Director & Segment Manager Battery Management Systems, NXP Semiconductors. “These are coping with the abundance of data from our electrification solutions, which requires cleansing and appropriate feature selection, and the variance of use cases, which requires model selection and adaptive training.”
“Electra has always been focused on using a software-first approach to address the electric vehicle battery industry’s most pressing range, lifetime, and safety concerns,” said Fabrizio Martini, Co-Founder and CEO at Electra Vehicles, Inc. “Now, we have the opportunity to demonstrate our core AI battery adaptive digital twin technology that powers EVE-Ai alongside NXP. NXP has proven to be the perfect partner in this endeavour as they provide cutting edge integration hardware that positions them as leaders in BMS digital twin and cloud connectivity technology for electrification.”
Electra’s EVE-Ai architecture processes the data to identify cycles (time series) and extracts features both at the battery and vehicle level. The adaptive cell modelling system technology then dynamically selects the most appropriate model for a specific usage profile.
NXP at electronica 2022
NXP will showcase a demo at electronica 2022 in Munich, of how AI can improve electric vehicle battery performance when EVs, equipped with Electra’s EVE-Ai, are connected through the cloud to AI-powered battery digital twins.