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maxwell超級電容ppt課件(已改無錯字)

2023-02-14 04:24:05 本頁面

　　

【正文】 determine dV/dt dV = I * (dt/C + ESR) ? 受控電力 ? Several ways to look at this: Pterm = I*Vcap –I2*ESR (solve quadratic for I) I = [Vcap sqrt(Vcap24*ESR*Pterm)]/(2*ESR) ? Solve for dV/dt as in currentcontrolled ? J=W*s=1/2CV2 Solve for C. Ultracapacitors l Microelectronics l HighVoltage Capacitors 帶單個儲能裝置的應用 ? Applications in which little total energy is required (. memory backup) ? Possibly used with other energy sources ? Short duration, high power (. pulse transmit) ? Long duration, low power ( UPS backup) ? Opportunities for high charge rates ( toys) Ultracapacitors l Microelectronics l HighVoltage Capacitors 帶兩個儲能裝置的應用 ? Power vs. Energy design trade when using two ponents ? 單原件與雙原件的比對 ? Engines/Fuel cells/Batteries/Solar Arrays are energy rich/power poor (or poor response) ? Size these ponents for enough energy, system may be limited in power ? Size these ponents for power, system may have surplus of energy ? Ultracapacitors are power rich/energy poor ? Size an ultracapacitor for enough energy, system may have a surplus of power ? Size an ultracapacitor for power, system may be limited in energy ? 雙元件 Two ponents ? A primary source for energy。 Ultracapacitor for power ? Requires appropriate definition of peak power vs. continuous power Ultracapacitors l Microelectronics l HighVoltage Capacitors 超級電容的老化 ? Unlike batteries, Ultracapacitors do not have a hard end of life criteria. ? Ultracapacitors degradation is apparent by a gradual loss of capacitance and a gradual increase in resistance. ? End of life is when the capacitance and resistance is out of the application range and will differ depending on the application. ? Therefore life prediction is easily done. Ultracapacitors l Microelectronics l HighVoltage Capacitors 電容和 ESR vs 頻率 Ultracapacitors l Microelectronics l HighVoltage Capacitors C and ESR Temperature Dependency Ultracapacitors l Microelectronics l HighVoltage Capacitors BCAP 自放電 Ultracapacitors l Microelectronics l HighVoltage Capacitors BCAP 循環能力 Ultracapacitors l Microelectronics l HighVoltage Capacitors BCAP Cycling 500’000 cycles between and V, 100 A ESR (1 Hz) increase 140 % ( to mOhm Capacitance decrease 38 % (2760 to 1780 F), 30% pared to rated capacitance Ultracapacitors l Microelectronics l HighVoltage Capacitors BCAP 直流壽命 DC Life Capacitance and ESR variation at U, T = 40 176。C Ultracapacitors l Microelectronics l High

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