5.5V 4F super capacitor
Working temperature range
Rated discharge capacitance
High temperature load
High temperature storage
1) The lifetime is 200000cycles.
2) Warranty time is with 8 years comprehensive warranty.
3) The delivery time is 7 business days.
Although many users choose uninterruptible power supply (UPS) as a remedial device for power supply when the grid is powered off or the grid voltage is instantaneously dropped, the UPS appears to be overkill for voltage transient drops. The UPS is powered by the battery and the working time lasts for a long time. However, due to the shortcomings of the battery itself (regular maintenance and short life), the UPS needs to pay attention to the state of the battery during operation. The duration of the power system voltage drop is often very short (10ms ~ 60s), so the advantage of using supercapacitors in this case is more obvious than the UPS: its output current can rise to hundreds of amps with almost no delay, and the charging speed Fast, energy storage can be achieved in a few minutes, so it can be used in the next power failure . Therefore, although the energy storage capacity of the supercapacitor can be maintained for a short time, when the usage time is about 1 min, it has an unparalleled advantage - 500,000 cycles, no need for care, and economy. In Singapore, ABB's dynamic voltage recovery device (DVR) using supercapacitor energy storage is installed in a 4MW semiconductor factory to achieve a low voltage span of 160ms.
Problems to be aware of during use
In the use of supercapacitors, the following issues should be noted:
1 Supercapacitors have a fixed polarity and should be confirmed before use.
2 Supercapacitors should be used at nominal voltage. Because when the capacitor voltage exceeds the nominal voltage, the electrolyte will be decomposed, and the capacitor will heat up, the capacity will decrease, and the internal resistance will increase, which will shorten its life.
3 Due to the existence of ESR, supercapacitors cannot be used in circuits with high frequency charge and discharge.
4 When the supercapacitors are used in series, there is a voltage equalization problem between the cells. Simple series connection can cause one or several single capacitors to be damaged due to overvoltage, thus affecting their overall performance.