Charge and discharge control method and system for reconfigurable super-capacitor stack based on temperature suppression

A charge-discharge control and supercapacitor technology, applied in charge equalization circuits, battery circuit devices, current collectors, etc., can solve problems such as limiting the service life of supercapacitor stacks, and achieve the effect of good life balance, prolong life and low cost.

Active Publication Date: 2019-09-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a supercapacitor bank formed by connecting multiple supercapacitor cells in series, its overall life depends on the most aging cell, so the imbalance problem will greatly limit the service life of the supercapacitor stack

Method used

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  • Charge and discharge control method and system for reconfigurable super-capacitor stack based on temperature suppression
  • Charge and discharge control method and system for reconfigurable super-capacitor stack based on temperature suppression
  • Charge and discharge control method and system for reconfigurable super-capacitor stack based on temperature suppression

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with examples. see figure 1 , The charge and discharge control system of a reconfigurable supercapacitor stack based on temperature suppression provided in this embodiment includes: a reconfiguration control module, a signal drive module, a sensor acquisition module and a power supply module. Such as image 3 As shown, the supercapacitor stack includes supercapacitor cells connected in series and parallel and an auxiliary controllable switch for each supercapacitor cell. In this embodiment, the signal for opening and closing the controllable switch is a PWM signal, so the switch can use an existing semiconductor switch. The supercapacitor stack is reconfigured through series controllable switches and parallel controllable switches, that is, whether to connect supercapacitor cells to control the charging and discharging state of supercapacitors or the rising trend of temperature.

[0054] Among them,...

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Abstract

The invention discloses a charge and discharge control method and system for a reconfigurable super capacitor stack based on temperature suppression. The method comprises the following steps: periodically acquiring the temperature of each super-capacitor monomer in a charge and discharge process, wherein the super-capacitor monomers are connected in series and in parallel through a controllable switch; 2, carrying out temperature suppression processing in real time according to the temperature of each super-capacitor monomer collected each time, wherein the temperature suppression process comprises the step: calculating the difference value between the currently collected temperature of each super-capacitor monomer and the average temperature; obtaining a reconstruction control signal of each super-capacitor monomer according to the difference value information; and controlling the on-off of a controllable switch of each super-capacitor monomer according to the reconstruction control signal of each super-capacitor monomer. According to the invention, the temperature suppression is realized by controlling access and cut-out of the super-capacitor monomers in the charging and discharging process, so that the service life of the whole super-capacitor stack is prolonged, and the service lives of all the single super-capacitor stacks are consistent.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a reconfigurable supercapacitor stack charging and discharging control method and system based on temperature suppression. Background technique [0002] In a supercapacitor stack energy system composed of a large number of supercapacitors connected in series and parallel, different supercapacitors have different states (such as terminal voltage and internal resistance) and different degrees of aging. During the charge and discharge process, the difference of these parameters often affects the performance of the system during charge and discharge. For example, a severely aged supercapacitor cell will generate large heat energy during charging and discharging, which may damage the supercapacitor cell and make the entire supercapacitor stack unable to work normally. Secondly, the capacity of a severely aging supercapacitor cell when it is discharged ( The termin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34H02J7/00
CPCH02J7/0016H02J7/0019H02J7/0091H02J7/345
Inventor 黄志武李恒蒋富刘勇杰杨迎泽刘伟荣彭军张晓勇周艳辉
Owner CENT SOUTH UNIV
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