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.
CN110289672AActive Publication Date: 2019-09-27CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2019-09-27

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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.
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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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