Dual-voltage battery management system enables mild hybridization

June 05, 2019 //By Christoph Hammerschmidt
Dual-voltage battery management system enables mild hybridization
From 2020, newly registered vehicles in the EU will not be allowed to exceed a limit value of 95 grams of CO2 per kilometre. In order to achieve this value even with combustion engines in the portfolio, as many vehicles as possible must be partially electrified. For this purpose, electronics supplier Hella KGaA has developed the Dual Voltage Battery Management System for the compact and mid-size classes.

The system allows vehicle designs with combustion engines to be converted to a mild hybrid. It combines the conventional separate core elements such as 48V battery, 12V battery and voltage converter (DC/DC converter) within a single product in the installation space of a conventional lead-acid battery. This makes it easy to integrate the system into the existing vehicle architecture. Another advantage is that the Dual Voltage Battery Management System eliminates the need for a lead-acid battery in the car. The innovative system consists entirely of lithium-ion cells that are switched intelligently depending on the application. Thus, the capacity can be used specifically in the 12V vehicle electrical system or 48V vehicle electrical system.

Hella has designed the PowerPack 48Volt for vehicles with higher performance classes. It combines a 48V lithium-ion battery block including battery management and DC/DC converter. The PowerPack 48 Volt draws in an additional 12V battery in the vehicle and enables hybrid functions such as recuperation of energy during braking or active sailing (the combustion engine is switched off while driving) as well as further comfort functions for the luxury class. These include ambient lighting, automatic air conditioning and active chassis control.

The new products primarily serve the growing 48V mild hybrid market. 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. "Hybridization with 48 volts is particularly promising because it requires only minor intervention in the vehicle architecture and at the same time offers efficient energy recovery methods and improved energy efficiency," says Björn Twiehaus, Head of Energy Management Product Center at Hella.

More information: https://www.hella.com/hella-com/en/index.html

Related articles:

Hella introduces electromobility strategy

48V/12V Dual Battery Automotive Systems Require Bi-Directional DC/DC Controllers

48V demo vehicle highlights potential of mild hybrid

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