Balanced bidirectional charging method of super capacitor

A technology of supercapacitor and charging method, which is applied in the direction of electrical components and electric energy storage systems, etc., and can solve problems such as poor actual effect and waste of charging energy
CN101728875AActive Publication Date: 2010-06-09TIG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIG TECH CO LTD
Publication Date
2010-06-09

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Abstract

The invention relates to a balanced bidirectional charging method of a super capacitor. The method comprises the following steps of: in a control unit, filtering out the harmonic voltage of the fully charged voltage of the super capacitor when being fully charged voltage through a low pass filter to obtain filtering voltage, and setting the filtering voltage as the threshold voltage of a transistor; starting a high-frequency charger to charge the super capacitor, controlling the control unit to control a chargeable battery and the bypass circuit to be in a disconnection state, controlling a variable voltage regulator and a charging circuit to be in a disconnection state, and monitoring the bypass current of the bypass circuit in real time by a detector; with the charging operation, when the voltage of the super capacitor is boosted to the threshold value which is achieved by filtering the fully charged voltage through the low pass filter, conducting the transistor and enabling the current to pass through the bypass circuit. The method n balances the charging of the super capacitor on the primise of saving electric energy.
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Description

technical field

[0001] The invention relates to a charging method for a supercapacitor, in particular to a bidirectional charging method and an equalized charging method for a supercapacitor. Background technique

[0002] Ultracapacitors are well known in the art and are currently being developed for use as power sources in high energy appliances such as in engine starting and as uninterruptible power supplies. In these applications, what is needed is a power supply that can be charged quickly and cycled many times, and this power supply often includes a supercapacitor instead of a conventional battery.

[0003] Supercapacitors are capable of delivering high specific power in a short time. The discharge (or charge) time performance of a supercapacitor is that it can transmit a specific power exceeding 1kW / kg within a few seconds or tens of seconds. Individual supercapacitors vary in capacitance from 1F to about 3500F, yet have very low resistance, typically less than 1mΩ. ...

Claims

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