Rheinmetall’s NanoLam™ capacitors represent a leap forward in the realm of power management for inverters, charging systems, and DC-DC conversion. These capacitors boast a higher capacity density and higher temperature stability with ideal package options while maintaining very low inductivity.

Positioned directly upstream of the inverter, our DC-Link Capacitor acts as a short-term energy buffer for the traction motor. This design is critical in managing the fluctuating current demands that the distant battery cannot promptly adjust to.

Furthermore, the versatility of our capacitors is underscored by their adaptability, being equally effective when utilized in on-board chargers, DC-DC converters, or auxiliary drives, thereby ensuring seamless and efficient energy conversion across various applications.

Benefits

• A novel production process, based on the parallel deposition of metal and dielectric system in situ.
• Production process allows for ultra-thin layers with less restrictions, gaining direct advantages in terms of capacitance density and ohmic losses.
• The use of acrylic plastic as dielectric material, which provides advantages in:
  • terms of dielectric constant (εR=3.2)
  • breakdown voltage
  • temperature resistance
  • thermal conductivity
  • oxygen content for improved self-healing capabilities.
• The rectangular shape achieves a high package utilization, and allows for busbar structures with favorable cooling properties and low parasitic loop inductances.

Rheinmetall’s Solid State Relay is tailored to systems with a power requirement of around 500 kW. This semiconductor-based safety switch features a scalable design that covers a wide range of applications and ensures optimal performance and reliability. With a series of parallel unidirectional 1200 V SiC MOSFETs, it guarantees efficient energy management.

The switch has integrated autonomous overcurrent protection with a configurable trigger threshold and offers precise and reliable safety measures. Commanded switching and diagnostics are controlled and monitored via the battery management system (BMS). In addition, the design prevents arcing and has an integrated RC snubber circuit and freewheeling diode for improved protection.

Combining cutting-edge technology with robust safety features, this main switch is the ideal choice for high-performance systems.

Benefits

• Fastest possible disconnect with lowest fault currents
• Autonomous and commandable switching
• High-side and low-side topology
• Bidirectional current carrying, unidirectional current blocking
• Reproducible current cut-off characteristics
• Improved redundancy SSR+HVC vs. 2×HVC
• Wear-free switching
• Reduced requirements for other components (wear reduction, mech. shock immunity)
• Integrated current measurement and diagnosis
• Resettability

Rheinmetall’s SiC MOSFET half-bridge power module is the cornerstone of advanced e-traction inverter technology, designed for the forefront of electric vehicle propulsion. This power module is uniquely scalable for vehicle specific voltage and power requirements, with configurations available for both 750V and 1,200V systems. The agnostic design of the MOSFET ensures adaptability and compatibility with a wide range of electric vehicles, reflecting our commitment to innovation and excellence in meeting the diverse needs of the e-mobility market.

Benefits

• Dual Sided Direct Cooling (DSDC): very efficient transistor cooling.
• Parasitic impedance optimized electrical design: allowing for ultra fast switching with reduced losses.
• Due to improved thermal budget smaller SiC MOSFET die area for same current rating.