Controllable capacitance energy release circuit

An energy discharge and voltage detection circuit technology, applied in the direction of regulating electrical variables, electrical components, control/regulating systems, etc., can solve problems such as endangering the service life of supercapacitors and overcharging of cells

Inactive Publication Date: 2018-11-13
湖北德普电气股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a controllable capacitive energy discharge circuit that overcomes the above problems or at least

Method used

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  • Controllable capacitance energy release circuit
  • Controllable capacitance energy release circuit
  • Controllable capacitance energy release circuit

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] Such as figure 2 As shown in the figure, a controllable capacitive energy discharge circuit is shown, including a rectification filter circuit, a bidirectional DC-DC converter, an inverter circuit, a controller, a voltage detection circuit, and an overvoltage protection circuit;

[0024] The rectification and filtering circuit, the bidirectional DC-DC converter, and the inverter circuit are connected in sequence, the inverter circuit is connected to the load, the rectification and filtering circuit is connected to an external power supply, and the bidirectional DC-DC converter passes through the overvoltage protection circuit A controller is connected, the control...

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Abstract

An embodiment of the invention provides a controllable capacitance energy release circuit. When an external power source supplies power normally, a voltage detection device detects electric quantity of a supercapacitor; if the voltage of a supercapacitor module is a rated value, a bidirectional DC-DC converter does not operate, and the supercapacitor module is not charged; if the voltage of a supercapacitor module is lower than the rated value, the bidirectional DC-DC converter operates to charge the supercapacitor module until the rated value is reached. When the external power source fails,a controller detects power failure through an external power failure detector, then the DC-DC converter is started, the supercapacitor module serves as a power source to supply power to a load throughan inverter, and when output voltage of the DC-DC converter is lower than the minimum voltage required by the inverter, outputting is terminated. The problem of serious damages of service lives of supercapacitors due to certain element overcharge caused by direct series connection in charging and discharging in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of capacitor charging and discharging, and more specifically, to a controllable capacitor energy discharge circuit. Background technique [0002] Supercapacitor is an efficient, environmentally friendly and practical energy storage device. It has great application value and potential in many fields such as green environmental protection, hybrid power, clean energy, consumer electronics, etc. It fills the gap between ordinary capacitors and batteries. Energy and specific power blank, with capacitance as high as thousands of Farads. Supercapacitor is a large-capacity energy storage device that has developed rapidly in recent years. It has the characteristics of high power density, short charge and discharge time, high efficiency, long service life, clean and environmentally friendly. The supercapacitor has a charge and discharge efficiency of more than 90%, the charge and discharge current can reach several a...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02M3/156H02M7/06H02M1/14H02M7/5387
CPCH02M1/14H02M1/32H02M3/156H02M7/06H02M7/53875H02M1/322
Inventor 李水冰朱万明程美红
Owner 湖北德普电气股份有限公司
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