Charging and discharging control and management method and device for SC-Li-SC hybrid energy storage

A charge-discharge control and hybrid energy storage technology, applied in circuit devices, battery circuit devices, circuit monitoring/indication, etc., can solve problems such as complex power management strategies, increase the number of charge and discharge cycles, stabilize the discharge voltage, and reduce electric energy The effect of the loss

Pending Publication Date: 2021-02-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the advantages of a hybrid energy storage system composed of supercapacitors and rechargeable batteries are compelling, the complex power management strategies of the system itself require further exploration.

Method used

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  • Charging and discharging control and management method and device for SC-Li-SC hybrid energy storage
  • Charging and discharging control and management method and device for SC-Li-SC hybrid energy storage
  • Charging and discharging control and management method and device for SC-Li-SC hybrid energy storage

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Embodiment Construction

[0051] In order to enable those skilled in the art to further understand the features and technical content of the present invention, the following describes the embodiments of the present invention in detail in conjunction with the flow chart and the implementation manner.

[0052] Step 1: Switch to supercapacitor charging mode 1: Use supercapacitor SC1 to receive unstable power from new energy generation (charging SC1)

[0053] Step 2: Detect whether the supercapacitor SC1 is full, if not, go to step 3; if yes, go to step 4.

[0054] Step 3: Continue charging the supercapacitor SC1.

[0055] Step 4: Stop charging the supercapacitor SC1 and go to step 5.

[0056] Step 5: Switch to supercapacitor charging mode 2: Use supercapacitor SC2 to receive unstable electric energy generated by wind power (charging SC2).

[0057] Step 6: Switch the entire device to the rechargeable battery charging mode 1: The supercapacitor SC2 stops discharging to charge the rechargeable battery, and...

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Abstract

The invention discloses a charging and discharging control and management method and device for SC-Li-SC hybrid energy storage, and belongs to the field of hybrid energy storage. The device comprisessuper capacitors, a rechargeable battery, a voltage stabilizing device, a current sensor, and a controller. The method comprises a method of smoothing charging power with strong randomness and large fluctuation amplitude, a method of judging whether a single super capacitor finishes charging the rechargeable battery, a method of switching the super capacitors to enable the super capacitors to performing charging and discharging efficiently, and a method of realizing the approximate voltage-stabilizing discharging of the rechargeable battery. The current sensor is used for detecting the currentwhen the super capacitors charge the rechargeable battery; the controller controls the working states of the super capacitor SC1 and the super capacitor SC2 according to the current between the supercapacitors and the rechargeable battery. According to the charging and discharging control and management method and device of the invention, through a corresponding control strategy, a whole hybridenergy storage device can stably and safely charge and discharge energy under the conditions of unstable new energy generation power and large fluctuation amplitude by utilizing respective performanceadvantages of the super capacitors and the rechargeable battery.

Description

technical field [0001] The invention relates to the field of hybrid energy storage, in particular to a SC-Li-SC hybrid energy storage charging and discharging control and management method and device. Background technique [0002] With the continuous increase in the installed capacity of new energy power generation in my country, new energy is connected to the grid as a distributed energy source. Among them, wind and solar energy are used as new energy for power generation. , will inevitably bring negative impacts on grid operation, scheduling, control, etc. Therefore, the development of energy storage technology has become an effective means to solve this problem. A single energy storage device can no longer be safely and efficiently applied to new energy power generation and energy storage. [0003] Rechargeable batteries have high energy density and long service life, and can be used in current grids as energy storage devices, but their excellent performance is premised o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34H02J7/00
CPCH02J7/345H02J7/0048H02J7/00712H02J7/00714H02J7/0068
Inventor 智鹏飞杨晔朱琬璐邱海洋王慧朱志宇
Owner JIANGSU UNIV OF SCI & TECH
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