Marelli presents improved battery management system
The BMS is intended to “elevate the standard for battery cell management by ensuring optimal operation and enhanced performance of the battery pack,” says Marelli. It provides “insights specifically into the lithium-ion batteries’ degradation, and related capacity reduction and increased resistance.” The company adds: “Such insights are essential for accurately determining the remaining useful life of the batteries and, therefore, their residual economic value.”
Electrochemical Impedance Spectroscopy (EIS) is one of the methods used by car manufacturers and cell manufacturers to test and check their batteries in the laboratory. According to Marelli, it has developed a cost-effective solution that is suitable for mass production and can be installed in every battery pack. The EIS allows individual batteries to be randomly analysed in the laboratory, and the data can also be used in real-time for battery management control.
Marelli describes the current version of his BMW as “EIS ready.” On the other hand, the version that is due to be launched on the market in 2025 is referred to as “Full EIS.” It should further improve the capabilities, enable higher frequency measurements and provide a comprehensive overview of the condition of each battery cell. Using cloud connectivity and AI applications, the real-time estimation of the state of charge (SoC) and performance status will also become more precise, as will the assessment of the remaining useful life (RUL) and the performance degradation of the battery.
“Marelli stands as a true pioneer in the field of innovative applications and cutting-edge BMS technology development, aiming to meet our customers’ needs while presenting them with new opportunities for technological excellence,” says Giovanni Mastrangelo, CTO of Marelli’s Propulsion Solutions division. “The adoption of EIS and AI in BMS technology is anticipated to grow substantially in the coming years, enhancing safety, reliability, and performance standards in battery management for electric vehicles.”
The Marelli Group was founded in 2019. It is the result of the merger of the Italian supplier Magneti-Marelli (which previously belonged to Fiat-Chrysler) and the Japanese company Calsonic Kansei (with roots in Nissan).
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