12-V Lithium-Ion Battery Pack
Forvia Hella Integrates Li-Ion Cells and BMS into a Single Product
Forvia Hella’s first fully integrated 12-V lithium-ion battery pack addresses the growing demand for a reliable and intelligent low-voltage power supply in electric and hybrid vehicles.
By integrating lithium-ion cells and a battery management system, the battery pack reduces both weight and system complexity while simultaneously increasing the safety and reliability of the vehicle’s power supply. Forvia Hella has already received series production orders in the low to mid three-digit million-euro range from various international automakers for the 12-V battery pack. Series production is expected to begin in China next summer.
A reliable, stable 12-V power supply is also a key requirement in electric and hybrid vehicles: On the one hand, electric cars also use numerous different 12-V components related to safety and comfort, such as driver assistance systems and infotainment systems. On the other hand, the 12-V electrical system serves as a redundant power supply in the event that the power supply from the high-voltage electrical system fails, ensuring that systems such as steering and brakes remain operational.
Integration of lithium-ion cells and a battery management system into a single subsystem
To ensure the safe and reliable operation of lithium-ion batteries, Forvia Hella’s 12-V battery pack uses state-of-the-art multidimensional algorithms that precisely measure current, voltage, temperature, and other parameters. This enables highly accurate monitoring of both the state of charge (SoC) and the state of health (SoH)—even under demanding real-world conditions and throughout the battery’s entire service life.
The integration of lithium-ion cells and the battery management system into a single subsystem also reduces the required installation space and simplifies system interfaces. This allows for easier and more flexible integration into the vehicle architecture. The 12-V battery pack is also approximately 20 percent lighter than conventional lead-acid batteries.
Redundant Power Supply
Together with a high-voltage converter—also supplied by Forvia Hella—the 12-V battery pack provides a redundant power supply for safety-critical functions up to ASIL D. Initially, the high-voltage converter serves as the primary source, supplying power to the 12-V loads from the high-voltage electrical system. If the high-voltage electrical system fails, the 12-V battery pack takes over and ensures an uninterrupted power supply.
