Rapid low-loss voltage balancing system of super capacitor and its control method

A supercapacitor and voltage equalization technology, applied in the direction of protection/regulation hybrid/electric double layer capacitors, control/regulation systems, instruments, etc., can solve the problem of resistive elements affecting circuit equalization effect and safety, affecting circuit efficiency, and parallel resistance consumption Energy and other issues to achieve the effect of improving reliability and safety, increasing transfer channels, and reducing switching losses
CN103258651AInactive Publication Date: 2013-08-21SHANGHAI MARITIME UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI MARITIME UNIVERSITY
Publication Date
2013-08-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a rapid low-loss voltage balancing system of a super capacitor and a control method of the rapid low-loss voltage balancing system. A double-layer capacity voltage balancing circuit is used for performing voltage balancing on an energy storing unit, increasing energy transferring channels and improving balancing speeds and in addition, achieving zero-current on-off of a power switching element through a series resonance subcircuit based on a soft-switching technology and reducing loss in switching. With the voltage balancing circuit, a series connection super capacitor set can achieve voltage balancing in a short time. Reliability and safety of all units which works for a long time can be improved. Owning to the series connection resonance subcircuit, loss of switching of the circuit is little. As the control method can determine a working mode of the voltage balancing circuit, the voltage balancing circuit is little in power consumption in a standby state. The whole voltage balancing system is faster in speed, less in loss and higher in efficiency.
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Description

technical field

[0001] The invention relates to a fast and low-loss supercapacitor voltage equalization system and a control method thereof. Background technique

[0002] Supercapacitor (Super-capacitor) is a new type of energy storage device that uses the interface electric double layer capacitance formed between the electrode and the electrolyte to store energy. Compared with batteries and ordinary electrolytic capacitors, it has the advantages of high power density, fast charge and discharge speed, high efficiency, wide application temperature range, and long cycle life. At present, supercapacitors are widely used in renewable energy power generation systems, hybrid / pure electric vehicles, electric locomotive traction, uninterruptible power supply (UPS) and other fields. The rated voltage of a single supercapacitor is low (generally below 3V), so it needs to be used in series in order to meet the actual working voltage requirements. The difference in capacity of superca...

Claims

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