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A High-Efficiency 5.5kW Battery Backup Unit for OCP Open Rack V3 Using Partial Power Conversion
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| Author(s) |
Martin WATTENBERG, Lars BOHLAENDER, Matthias J. KASPER, Ulf SCHWALBE, Gerald DEBOY |
| Abstract |
Battery Backup Units (BBUs) are key components in modern, AI-centric data centers where uptime, efficiency, and high-power capability are critical.This paper presents a highly efficient BBU based on a 5.5 kW DC-DC converter using a partial power concept. The output power can be maintained for a battery voltage from 35 to 62 V according to OCP V3 (50V). A power density of 290 W/inch3 is achieved with a converter size of 75 x 128 x 36 mm while maintaining an efficiency above 99\%. A prototype has been built, and experimental resultsare presented. |
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| Filename: | 0108-epe2025-full-16213560.pdf |
| Filesize: | 4.14 MB |
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| Type |
Members Only |
| Date |
Last modified 2025-08-31 by System |
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