SPINOFF from Japan's Aerospace Technology

Application of UPS (Uninterruptible Power Supply) to AC output power storage devices

License (2009)
Original Technical Field: Space Science
Spin-Off Field: Environment and Energy

Voltage Equalization Control Technology (Patent)
  • Voltage equalization technology with simple switch configuration:
    - Equalizes the voltage of each battery cell in battery modules consisting of two or more in-line or parallel battery cells
  • Voltage control technology for preventing fluctuation in charging and discharging of capacitors:
    - Controls output voltage regulation within an arbitrary range while preventing fluctuation in charging and discharging of the capacitors in the capacitor module
  • DC / AC output power storage devices without special modules:
    - Output DC / AC power with low loss and noise, without requiring a special module
Application to
  • Enables power storage and equalization via a simple arrangement (only capacitor and switch needed)
  • Allows unstable power storage devices that rely on renewable energy sources to obtain maximum power via a power storage module with intermediate tap (eliminating the need for DC-DC converters)
  • Through use of a power storage module with intermediate tap, switching control technology of equalization circuits enables output of AC power with low loss and noise (eliminating the need for DC/AC inverters)

UPS (Uninterruptible Power Supply)

UPS (Uninterruptible Power Supply)

JCC (Japan Capacitor Industrial Co. Ltd.) has achieved superior effective voltage control and longer capacitor life using JAXA's Voltage Equalization Control Technology. Previously, capacitors could be used only for short periods because they spent large amounts of electricity on voltage control resulting from large voltage fluctuations. This new type of capacitor allows UPS devices to operate in a wide temperature range (-20℃~60℃) and achieve battery life more than three times longer than with standard battery technology.
Courtesy of Japan Capacitor Industrial Co. Ltd.

AC output power storage devices

AC output power storage devices

Power generation from renewable energy sources varies greatly depending on weather conditions. Consequently, power storage from renewable energy traditionally uses a lot of power to equalize input voltage fluctuation via a buck-boost circuit. This new power storage method, using JAXA's Voltage Equalization Control Technology, realizes high efficiency in power input and conversion for a wide range of input-output voltages, eliminating the need to use a buck-boost circuit for input voltage fluctuation.
Courtesy of Japan Capacitor Industrial Co. Ltd.

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