Mercedes Unveils Power Converter to Provide Constant 800-Volt Supply in Electric Vehicles

Mercedes is developing an innovative Power Converter technology designed to deliver a consistent voltage of up to 800 volts in electric vehicles, regardless of the battery’s state of charge or age. Traditionally, electric vehicle batteries experience voltage drops as they discharge or age, but Mercedes’ approach uses multiple small programmable converters that manage energy flow from individual or grouped battery cells. This parallel operation enables a stable direct current supply to the drivetrain, optimizing performance even as battery conditions vary.

The new system can assess the condition of each battery cell, allowing for improved load management and efficiency. By maintaining a higher voltage, the system reduces the current required for the same power output—for instance, only 250 amps are needed at 800 volts compared to 500 amps at 400 volts. This reduction in current leads to less heat generation and permits the use of lighter, thinner wiring, beneficial for vehicle design and efficiency.

Additionally, Mercedes’ Power Converter integrates multiple functions by handling both alternating current (AC) and direct current (DC) conversions and supports bi-directional charging capabilities such as vehicle-to-load (V2L), vehicle-to-home (V2H), and vehicle-to-grid (V2G). This consolidation of functions enhances the versatility and efficiency of electric vehicle power management systems.

This technological advancement offers promising improvements in electric vehicle battery management and overall efficiency, positioning Mercedes at the forefront of addressing key challenges in electric mobility.