Charging and discharging system with adjustable bidirectional currents and voltages of supercapacitor

A supercapacitor, current and voltage technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of inflexible application of supercapacitors and limited use of supercapacitors

Inactive Publication Date: 2014-07-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will cause the charging power supply of the supercapacitor to be only higher than the voltage of the supercapacitor, and the working voltage required by the discharge device of the supercapacitor can only be close to or lower than the voltage of the supercapacitor.
This not only makes the application of supercapacitors inflexible, but also limits the use of supercapacitors

Method used

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  • Charging and discharging system with adjustable bidirectional currents and voltages of supercapacitor
  • Charging and discharging system with adjustable bidirectional currents and voltages of supercapacitor
  • Charging and discharging system with adjustable bidirectional currents and voltages of supercapacitor

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Effect test

Embodiment 1

[0022] The idea of ​​the present invention is to adjust the input and output voltages of the supercapacitor by using a switchable step-up and step-down circuit, and then charge and discharge the supercapacitor stably.

[0023] The bidirectional charging and discharging system with adjustable current and voltage of the present invention has U1 and U2 dual ports (such as figure 1 shown), consists of four IGBT modules (Q1, Q2, Q3, Q4) connected in parallel with diodes opposite to their conduction directions, two dual-unit IGBT drive modules (D1, D2), a current storage inductor (L1), It consists of two intermediate energy storage capacitors (C1, C2) at the input and output terminals, two voltage acquisition modules (Vm1, Vm2), two current acquisition modules (Cm1, Cm2) and a microprocessor (M1).

[0024] Between the positive terminal of U1 and the positive terminal of U2, there is a first current collection module Cm1 connected in series in sequence, the collector terminal is conn...

Embodiment 2

[0027] Taking supercapacitor charging as an example, U1 is used as the input terminal of the charging power supply, and U2 is used as the input terminal of the supercapacitor. When the U1 voltage is higher than the U2 voltage, the microprocessor M1 only controls the closing and opening of the pulse width modulation for Q1, and gives the opening signal control for Q2, Q3, and Q4. At this time, the IGBT modules Q2, Q3, Q4 acts like a diode. When Q1 is closed, the system circuit can be simplified as figure 2 In the circuit shown, the role of module Q1 is equivalent to that of a wire. At this time, the current storage inductor L1 in the circuit is in the energy storage stage, and the U1 terminal provides energy for the current storage inductor L1 and the intermediate energy storage capacitor C2, and then supplies power to the U2 terminal; when Q1 When disconnected, the whole circuit can be simplified as image 3In the circuit shown, the function of the module Q1 is equivalent t...

Embodiment 3

[0031] Taking the supercapacitor discharge as an example again, the U2 terminal is used as the supercapacitor access terminal, and the U1 terminal is used as the power output terminal. When the output terminal voltage requirement is lower than the supercapacitor voltage, the microprocessor M1 only conducts pulse width modulation control on Q2, and gives off signal control to Q1, Q3, and Q4. At this time, the IGBT modules Q1, Q3, and Q4 Acts like a diode. When Q2 is closed, the system circuit can be simplified as Image 6 In the circuit shown, the current storage inductor L1 in the circuit is in the energy storage stage at this time, and the U2 terminal provides energy for the current storage inductor L1 and the intermediate energy storage capacitor C1, and then supplies power to the U1 terminal; when Q2 is disconnected, the system circuit can be simplified For such Figure 7 In the circuit shown, at this time, the current storage inductor L1 in the circuit releases energy to...

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Abstract

The invention discloses a charging and discharging system with adjustable bidirectional currents and voltages of a supercapacitor and belongs to the technical field of charging and discharging of the supercapacitor. The charging and discharging system is composed of four IGBI modules (Q1, Q2, Q3 and Q4) with backward diodes, a current accumulation inductor (L1), two input and output end middle energy storage capacitors (C1 and C2), two voltage collecting modules (Vm1 and Vm2), two current collecting modules (Cm1 and Cm2), two double-unit IGBI drive modules (D1 and D2) and an STM32103VE microprocessor (M1) produced by the STMicroelectronics enterprise. The charging and discharging system has the prominent advantages that the purpose of charging and discharging in the wide voltage range of the supercapacitor can be achieved with few devices, and the problem that due to the fact that the charging and discharging voltage is mismatched with the impedance, a power source or power devices are damaged is solved.

Description

technical field [0001] The invention belongs to the technical field of charging and discharging of supercapacitors, and in particular relates to a charging and discharging system with adjustable bidirectional current and voltage for supercapacitors. Background technique [0002] The maturity of supercapacitor production technology and the rapid development of supercapacitor application research have brought the possibility of new power storage devices. As an energy supply device with high power density, supercapacitor has an irreplaceable position in the future. However, the charging of the supercapacitor bank requires a power supply whose voltage changes with the voltage at both ends of the supercapacitor, so the requirements for the supercapacitor charging power supply become higher, and the voltage of the charging power supply must be higher than the voltage at both ends of the supercapacitor. Capacitor charging; and the discharge of the super capacitor also reduces the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 韩炜付成伟闫文龙
Owner JILIN UNIV
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