Marelli has been awarded a contract to supply Battery Management Systems (BMS) for the future BEV (Battery Electric Vehicles) comprising small and medium size cars of a major global carmaker from 2026.
Within the project, Marelli will provide both the hardware and the boot loader software of the BMS for A, B, and C-segment electric vehicles. Hannes Prenn, President, Marelli’s Electric Powertrain division, noted that the supply represents a significant achievement in terms of production volumes.
He said, “This further reinforces our collaboration with global carmakers and recognises the consolidated experience achieved by Marelli over the years in the development of BMS with different architectures to fit the specific needs of our customers and co-create with them the vehicles of tomorrow.”
The awarded BMS will be developed and tested by Marelli Electric Powertrain teams in Italy and Japan. The start of production is planned for 2026, supplying various plants of the carmaker.
The BMS will be based on a distributed architecture, requiring reduced harnesses. The system – which, in brief, has the role of monitoring and controlling the battery – incorporates all the lithium battery cell-related hardware on a Cell Module Controller (CMC) placed directly on the cell module being monitored. This solution alleviates the bulk of the cabling, which is limited to a few sensor wires and communication wires between adjacent CMC modules. Consequently, each CMC is more self-contained and handles measurements and communications as required.
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