Electric power storage device

Abstract

The invention relates to an electric power storage device. The device comprises a capacitor array, a detection control switch module, and a switch set. The capacitor array includes multiple parallelly connected capacitors. The capacitor array is connected with an input terminal of an external power supply and is used for electric power storage. The detection control switch module is used for detecting an output voltage of the capacitor array and for transmitting a control signal to the switch set when the output voltage is smaller than a reference voltage. The switch set is used for connection or disconnection switching according to the control signal transmitted by the detection control switch module so as to change a connection method of each capacitor in the capacitor array to increase the output voltage of the capacitor array. The device can fully utilize energy stored in a backup capacitor, improves the use efficiency and conversion efficiency of electric power, and increases backup power supply time, so that data safety and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an electric energy storage device. Background technique [0002] With the development of demand and the advancement of technology, more and more capacitor backup power is used on motherboards such as servers or storage. Through a certain backup power mechanism, the energy stored in the backup capacitor is used to power the system suddenly at the input end of the main power supply. Instantly provide power, so that the power supply can maintain effective output within a certain period of time. This period of retention time can be regarded as a life-saving time for key data. During this period of time, key data can be saved to permanent storage media in time, thereby improving data security and reliability. [0003] Backup capacitors can be supercapacitors or tantalum capacitors, etc. Most of the existing backup capacitors use a large number of supercapacitors or tantal...

AI Technical Summary

Problems solved by technology

At this time, there is still a large amount of electric energy remaining in each capacitor of the capacitor array 1 that cannot be effectively utilized, resulting in a waste of energy stored in the capacitor

Moreover, as the capacitor continues to discharge and the VIN voltage continues to decrease, the efficiency of the power converter T1 also decreases during this process, and the power usage efficiency decreases accordingly.

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