High-efficiency and high-power supercapacitor module voltage equalization device and method

Abstract

The invention discloses a device and method for balancing the voltage of an efficient high-power super capacitor module. The device comprises an energy management system and the super capacitor module composed of n super capacitor bodies C. The super capacitor bodies C in the super capacitor module are provided with DC / DC converting modules correspondingly one to one. An auxiliary power source, a sampling alarming circuit and a CAN bus communication module are further arranged in the device. The series connection total voltage of n super capacitor bodies C is adopted by the input side of the auxiliary power source, and the direct-current voltage at each level is output to be respectively supplied to the DC / DC converting modules, the sampling alarming circuit and the CAN bus communication module for use, voltage output of the auxiliary power source is received by the sampling alarming circuit, and temperature output data of the super capacitor bodies C are uploaded to the energy management system through the CAN bus communication module. The energy management system sends a control order to the DC / DC converting modules through the CAN bus communication module and the corresponding DC / DC converting module is triggered to be connected or disconnected through the control order.

Description

technical field [0001] The invention relates to the field of voltage equalization, in particular to a high-efficiency and high-power supercapacitor module voltage equalization device and method. Background technique [0002] Supercapacitor is a high power density energy storage device that uses activated carbon multi-air electrodes and electrolytes to form a double-layer structure to store electric energy. Its performance is between that of electrostatic capacitors and batteries. , fast charging and discharging, and environmental friendliness, the capacity of a single cell can reach tens of thousands of farads. [0003] In recent years, supercapacitors, as instantaneous, high-power-density energy storage devices, have been used in various occasions such as electric locomotive start-up, backup power supply, and urban public transport, and will play an important role in urban rail transit in the future. [0004] The single voltage of a supercapacitor is generally less than 2....

AI Technical Summary

Problems solved by technology

The energy recovery scheme reverses the excess energy of the high-voltage supercapacitor monomer to the general circuit through the first-stage DC / DC conversion circuit. Because the voltage of the supercapacitor monomer is less than 2.7V, the current will be very large when high power is required to transfer energy. High current will greatly increase the power loss on the DC / DC conversion circuit, and this type of solution is not suitable for high-power applications

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