Infineon Boosts Power Density in Daihen’s Grid Storage Power Conditioner

How electronics aid in renewable energy systems. Video used courtesy of Infineon
 

Renewable energy sources have gained significant traction as alternatives to fossil fuels. However, integrating these sources into the grid presents several hurdles, notably in energy storage and power conditioning. Larger and more efficient storage solutions have increased the need for higher voltage and power density.

Daihen Corporation selected Infineon’s CoolSiC 2000 V modules for its new unit-type power conditioners for grid storage batteries. This technology enables more durable and compact storage units, reducing the footprint by 40%.

Example of Infineon’s CoolSiC technology. Image used courtesy of Infineon

Renewable Energy Landscape

Renewable energy’s intermittent nature remains a growing concern. Long-term energy storage has emerged as a solution for a reliable energy flow.

Renewables like solar panels generate DC electricity, generally optimized by a maximum power point tracking device to maintain peak efficiency. This optimized DC power goes through a DC-DC converter, which adjusts the voltage to a consistent level known as the DC link voltage. The inverter then converts this DC link voltage into AC power, matching frequency and voltage to allow proper integration within the larger grid. 

PV system with grid through power conditioner (inverter). Image used courtesy of Mohamed et al.

Finally, batteries store excess DC power and eventually feed it back into the DC link when renewable output is low. This integration allows for the smooth and reliable incorporation of renewable energy into the grid, with the DC link voltage ensuring optimal performance and stability.

Power conditioners regulate and stabilize the electricity flow from storage batteries to the grid. They convert DC to AC, control voltage levels, and protect against power surges. Today, the industry is widely adopting advanced power conditioners due to their ability to enhance efficiency, reliability, and power density.

Pioneering High Voltage Energy Solutions

Daihen has deployed Infineon’s CoolSiC 2000 V modules in their unit-type power conditioners for grid storage batteries. 

These power conditioners are designed to connect to storage batteries at a high DC link voltage of 1500 V, which Daihen claims facilitates large-capacity storage battery facilities and reduces the footprint of grid storage batteries by 40% compared to conventional products. This compactness is achieved through Infineon's 62 mm CoolSiC MOSFET 2000 V module, which is a half-bridge solution providing high voltage, thermal dissipation, and power density. 

Daihen’s power conditioner unit. Image used courtesy of Infineon

Moreover, these modules feature Infineon’s M1H trench technology, which extends the gate drive voltage range to handle a wider range of voltage inputs, enhancing its durability and operational stability under high-stress conditions. Overall, Infineon’s technology has helped Daihen achieve a more compact, efficient, and reliable power conditioner solution.

Toward Sustainability

The energy future will rely on continuous technological advancements to push the boundaries and drive us closer to a greener and more resilient power grid. Infineon and Daihen’s collaboration can enhance the reliability and efficiency of renewable energy systems.