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Multi-parallel-and-serial super capacitor system balancing method

A technology for supercapacitor and system equalization, which is applied in the direction of storage of electric energy, electrical components, etc., can solve the problem of low overall performance of supercapacitors, and achieve the effect of simple equalization scheme, good equalization effect, and improvement of overall performance

Active Publication Date: 2013-01-02
HUIZHOU EPOWER ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a multi-parallel supercapacitor system equalization method to solve the technical problem that there is no suitable equalization strategy for supercapacitors in the prior art, and the overall performance of supercapacitors is low

Method used

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 The above is the system topology diagram of the embodiment of the present invention. The supercapacitor is composed of multiple single capacitors combined in series and / or in parallel, and the system includes:

[0041] Supercapacitors and controllers, a discharge resistor is connected in parallel at both ends of each single capacitor 1n (n=1,2,3,…), each discharge resistor is connected in series with a field effect transistor 2n (n=1,2,3 ,…), each FET 2n is connected to the isolation module 3n (n=1, 2, 3,…), all the isolation modules 3n are connected to the serial conversion module 4 and the controller 5 in turn, and the FET 2n is connected to The controller 5 controls on or off, thereby controlling the on and off of the discharge circuit.

[0042] Such as figure 2 Shown is a module structure diagram of th...

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Abstract

The invention relates to the relevant technical field of capacitor balancing, and in particular relates to a multi-parallel-and-serial super capacitor system balancing method. A super capacitor is formed by the combination of a plurality of monomer capacitors in a serial and / or parallel mode. The system comprises the super capacitor and a controller; a discharge resistor is connected in parallel to two ends of each monomer; each discharge resistor is connected with a switch module in series; and each switch module is connected with the controller, and is conducted or stopped by the control of the controller, thus the connection and disconnection of a discharge loop are controlled. According to the invention, by designing a passive balancing circuit, an appropriate balanced strategy is matched, the integral performance of a capacitor group is improved, the capacitor using rate is improved, and the service life of the capacitor group is prolonged. The balancing scheme provided by the invention is simple and reliable, and is high in interference prevention capability; and by means of a serial communication module, pin resources of the controller are saved greatly.

Description

technical field [0001] The invention relates to the technical field related to capacitor equalization, in particular to a system equalization method for multi-parallel supercapacitors in series. Background technique [0002] Supercapacitors are used as auxiliary power sources in electric vehicles and smart grid energy storage systems. Due to the differences in the manufacturing process of individual capacitors (manufacturing process, screening process, matching method, etc.), during use, groups of individual capacitors The inconsistency between them will gradually show up. Without external measures, the inconsistency will become larger and larger, which will further affect the overall performance of the capacitor system and further decline. [0003] When supercapacitors are used in vehicles or smart power stations, the capacitor management system generally does not have the capacitor equalization function, but only completes the collection of capacitor state data and perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00
Inventor 刘飞文锋阮旭松邓锦炽
Owner HUIZHOU EPOWER ELECTRONICS
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