07. Juni 2019, 08:24 Uhr | Stefanie Eckardt
The dual voltage battery management system combines 48 V and 12 V in one product and is connected via a 48 V line to the belt-driven starter generator in mild hybrids.
With the new products Dual Voltage Battery Management System and PowerPack 48 Volt, Hella is offers battery module solutions for mild hybrid vehicles. The new solutions enable savings of 5 to 6 grams of CO2 per kilometer and thus help to achieve CO2 targets in the short term.
Starting 2020, newly registered vehicles in the EU will not be allowed to exceed a limit value of 95 grams of CO2 per kilometer. »However, the internal combustion engine will not disappear overnight. In order to achieve the specified limit values, the vehicles must be electrified«, says Björn Twiehaus, Head of Product Center Energy Management and member of the Executive Board of the Electronics business division at Hella. For example, the supplier has developed the Dual Voltage Battery Management System for the compact and mid-range class. The system allows vehicles with internal combustion engines to be converted to a mild hybrid. It combines the conventional separate core elements such as 48 V battery, 12 V battery and a DC-DC converter within a single product in the package space of a conventional lead-acid battery. This makes it easy to integrate the system into the existing vehicle architecture. Another advantage: The Dual Voltage Battery Management System eliminates the need for a lead-acid battery in the car. The innovative system consists of lithium-ion cells that are switched intelligently depending on the application. Thus the capacity can be used specifically in the 12-V- or 48-V vehicle electrical system.
Hella has designed the PowerPack 48 Volt for vehicles in higher power rating classes. It combines a 48-volt lithium-ion battery pack including battery management and DC-DC converter. In addition to the 12-volt battery, the PowerPack 48 is also drawn into the vehicle. It enables hybrid functions such as recuperation or active coasting as well as other comfort functions for the luxury class. These include ambient lighting, automatic climate control and active chassis control.
The new products primarily serve the growing market of 48 V mild hybrids. According to studies by the London-based analysis company IHS Markit, the annual share of new registrations in this area will rise worldwide from 6 million in 2020 to 35 million in 2030.