KR101663991B1 - Apparatus for charging hybrid type - Google Patents

Apparatus for charging hybrid type Download PDF

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Publication number
KR101663991B1
KR101663991B1 KR1020150113596A KR20150113596A KR101663991B1 KR 101663991 B1 KR101663991 B1 KR 101663991B1 KR 1020150113596 A KR1020150113596 A KR 1020150113596A KR 20150113596 A KR20150113596 A KR 20150113596A KR 101663991 B1 KR101663991 B1 KR 101663991B1
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South Korea
Prior art keywords
unit
power
voltage
input
energy storage
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KR1020150113596A
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Korean (ko)
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심언규
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주식회사 경일그린텍
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    • H02J7/042—
    • H02J7/027—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

According to the present invention, disclosed is a hybrid charging apparatus capable of charging a hybrid energy storage unit with the maximum generation electricity of input power by using a power converter. The apparatus comprises: an input power detection unit to detect characteristics of input power supplied from a power supply unit; a power conversion unit boosting or lowering voltage supplied from the power supply unit to output the boosted or lowered voltage to an energy storage unit; an output power detection unit to detect characteristics of output power outputted from the power conversion unit; a storage voltage detection unit to detect voltage stored in the energy storage unit; a charging control unit to control operation of the power conversion unit according to power characteristics inputted from the input power detection unit and the output power detection unit depending on a charging condition; an output display unit to display an operation and a setting state of the charging control unit; and a key input unit to set the charging condition in the charging control unit and to select a function of the charging control unit.

Description

[0001] APPARATUS FOR CHARGING HYBRID TYPE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid charging apparatus, and more particularly, to a hybrid charging apparatus that allows a hybrid type energy storage unit including a battery and a capacitor to be charged using a power converter.

In general, as a result of global climate change, the crisis of environmental degradation and high oil prices, as well as the crisis of resource depletion, and the depletion of petroleum energy and the accelerated environmental pollution, the Kyoto Protocol to prevent global warming becomes effective. Accordingly, new and renewable energy and development for suppressing CO2 emissions are emerging as urgent tasks.

Under these circumstances, the direction of technology development focuses on the development of new and renewable energy using natural energy such as wind, tidal, solar, and hydro power. It also stores renewable energy as well as regenerative energy generated during braking of automobiles and electric trains The energy system or device which is treated as a loss in the storage system is improved and the loss rate is minimized.

The energy storage method is largely compressed by the energy storage method consisting of a capacitor, especially a super capacitor module, and an energy storage method using a battery, in particular, a lithium ion battery, both of which have advantages and disadvantages.

That is, since the energy storage system composed of the super capacitor module is difficult to reduce the peak power and can discharge only for a short time compared to the battery type during discharging, the energy storage efficiency is much lowered, but the response speed is high, .

On the other hand, the energy storage method using a battery has a problem in that the power factor compensation is not easy due to a slow response speed, but has an advantage that the peak power can be easily reduced and the energy can be stored for a long time.

Related prior arts are "Hybrid energy storage device and method in railway power system ", Korea Publication No. 2013-0074691 (Apr.

It is an object of the present invention to provide a hybrid type energy storage unit comprising a battery and a condenser, And a charging device.

According to an aspect of the present invention, there is provided a hybrid charging apparatus including: an input power detector for detecting a characteristic of an input power supplied from a power source by solar power generation; A power conversion unit for stepping up or stepping down the voltage supplied from the power supply unit and outputting the voltage to the energy storage unit; An output power detector for detecting a characteristic of the output power outputted from the power converter; A storage voltage detecting unit for detecting a voltage stored in the energy storing unit; A charge controller for controlling the operation of the power converter according to the characteristics of the input power supplied from the input power detector and the power characteristics input from the output power detector according to charging conditions; An output display unit for displaying an operation state and a setting state of the charge control unit; And a key input unit for setting a charging condition in the charge control unit and selecting a function of the charge control unit,
The energy storing unit is a hybrid type in which a capacitor and a capacitor connected in series are connected in parallel so that a plurality of summed voltages are larger than a voltage of the battery,
The charging condition includes a charging end voltage, a maximum charging voltage, a maximum power point of the input power source, and a minimum discharge voltage of the energy storage unit,
Further comprising a load switch interrupted between the energy storage unit and the load to interrupt the output of the energy storage unit,
The charge control unit drives the power conversion unit to increase or decrease the voltage supplied from the power supply unit to output to the energy storage unit when the input voltage inputted from the input power detection unit exceeds the set voltage, And a control unit for controlling the power supply unit so that a voltage supplied from the power supply unit is output to the energy storage unit, The load switch is turned off and the chargeable state of the energy storage unit is determined based on the voltage value input from the storage voltage detection unit and outputted. Further comprising a smoothing portion for suppressing power Further comprising a filter unit for removing noise generated in the affected part and outputting a power from the energy storage unit to the charge control unit, And a control power supply unit for supplying the control power.

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The charge control unit controls the drive of the power conversion unit by comparing the input voltage inputted from the input power detection unit and the output voltage inputted from the output power detection unit so that the maximum power point of the input power is maintained.

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In the present invention, the output display unit may include an LCD display device for displaying an operation state and a setting state of the charge control unit on an LCD panel; And an LED display unit for displaying an operation state of the charge control unit with an LED.

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The hybrid charging apparatus according to the present invention can charge a hybrid type energy storage unit including a battery and a capacitor with a maximum generated power of an input power source using a power converter.

In addition, since the battery and the capacitor can be simultaneously charged through the hybrid charging apparatus according to the present invention, the advantages of the battery and the capacitor can be utilized to the maximum, and the original service life of each battery can be maintained.

1 is a block diagram showing a hybrid charging apparatus according to an embodiment of the present invention.
2 is a table for explaining a configuration of an energy storage unit of a hybrid charging apparatus according to an embodiment of the present invention.

Hereinafter, a hybrid charging apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram showing a hybrid charging apparatus according to an embodiment of the present invention, and FIG. 2 is a table for explaining a configuration of an energy storage unit of a hybrid charging apparatus according to an embodiment of the present invention.

1, a hybrid charging apparatus according to an embodiment of the present invention includes an input power detecting unit 20, a power converting unit 40, an application power detecting unit 70, a storage voltage detecting unit 130, A display unit 110, an output display unit 150, and a key input unit 160.

The input power detecting unit 20 detects an input voltage and an input current, which are characteristics of an input power supplied from the power supply unit 10, and provides the detected input voltage and the input current to the charge control unit 110.

At this time, the input power detecting unit 20 may measure the open voltage of the power supply unit 10 by measuring the input voltage in a no-load state, if necessary. The open-circuit voltage is used to determine the maximum power point for solar power generation.

Here, the power unit 10 may include renewable energy using natural energy such as wind power, tidal power, photovoltaic power generation, and hydroelectric power as well as commercial power, and regenerative energy generated when braking an automobile or an electric vehicle.

The present embodiment will be described based on solar power generation.

The power conversion unit 40 boosts or downsteps the voltage supplied from the power supply unit 10 and outputs the voltage to the energy storage unit 80.

The power conversion unit 40 boosts or reduces the output voltage by controlling PWM (Pulse Width Modulation) of a MOSFET (Metal Oxide Silicon Field Effect Transistor) switch of the buck-boost circuit.

Therefore, the maximum output of the solar module (not shown) can be obtained by adjusting the output voltage so as to maintain the maximum power point in the solar power generation through the power conversion unit 40, thereby increasing the efficiency of the solar module The charging efficiency can be increased.

The output power detection unit 70 detects an output voltage that is a characteristic of the output power output from the power conversion unit 40 and provides the detected output voltage to the charge control unit 110.

The storage voltage detector 130 detects the voltage stored in the energy storage unit 80 and provides the detected voltage to the charge controller 110.

The energy storing unit 80 may be configured as a hybrid type battery and a capacitor connected in parallel, as shown in FIG.

That is, in the case of the 12V charging apparatus, the energy storage unit can be constituted by connecting a 12V battery and a 15V capacitor formed by connecting six 2.5V capacitors in series in parallel.

In the case of the charging device for 24V, the energy storage section can be constituted by connecting a 24V battery and a 30V capacitor constituted by connecting twelve 2.5V capacitors in series in parallel. Accordingly, even in the case of 48 V or more, the energy storage unit 80 can be constituted by such a combination.

The storage voltage detected by the storage voltage detector 130 is provided to the charge controller so as to perform overcharge control in comparison with the charge end voltage during charging, To the charging control unit 110.

The charge control unit 110 controls the operation of the power conversion unit 40 according to the power characteristics inputted from the input power detection unit 20 and the output power detection unit 70 according to the charging condition to supply power to the energy storage unit 80 Charge.

Here, the charging condition may include at least one of a charging end voltage, a maximum charging voltage, a maximum power point of the input power source, and a minimum discharge voltage of the energy storage unit 80.

The charging end voltage means an end voltage charged in the energy storage unit 80 to prevent overcharging during charging, the maximum charging voltage means a maximum voltage that can be input to the energy storage unit 80, Means a minimum voltage for preventing overdischarge of the energy storage unit 80.

In addition, the maximum power point means a point where the power unit 10 can output the maximum efficiency. In the case of the photovoltaic power generation, the maximum power point is 78% of the maximum voltage when the load is not connected.

Therefore, the charge controller 110 compares the input voltage inputted from the input power detector 20 and the output voltage inputted from the output power detector 70 so that the maximum power point of the input power is maintained, and drives the power converter 40 The charging efficiency can be increased.

The charge controller 110 receives the storage voltage from the storage voltage detector 130, performs overcharge control by comparing the stored voltage with the charge end voltage during charging, and performs over discharge control by comparing the stored discharge voltage with the minimum discharge voltage during discharge.

When the input voltage inputted from the input power detecting unit 20 is lower than the set voltage, for example, when the input voltage such as the day or the rainy day in the solar power generation is lowered below the set voltage, It is also possible to supply the input voltage directly to the energy storing unit 80 without passing through the capacitor 40.

On the other hand, the charge controller 110 may determine the chargeable state of the energy storage unit 80 based on the voltage value input from the storage voltage detector 130 at the beginning of charging, and may provide battery exchange information.

The output display unit 150 displays the operation state and the setting state of the charge control unit 110 so that the user can recognize the state of charge.

The output display unit 150 may include an LCD display unit 152 for displaying an operation state and a setting state of the charge control unit 110 on an LCD panel, And a display unit 155 may be provided.

When the LCD display device 152 is provided, the key input unit 160 may be provided with a display switch (not shown) for turning the LCD display device 152 on and off. Therefore, when the display switch is operated, the amount of discharge of the energy storage unit 80 may be minimized by operating the LCD display unit 152 only for the set time. At this time, the operation time of the LCD display device 152 may be arbitrarily set by the user through the charge control unit 110. [

The key input unit 160 sets a charging condition in the charge control unit 110 and selects a function in the charge control unit 110. [

In this way, various parameters for operating the charging controller 110 can be set in addition to the charging conditions through the key input unit 160. [ The charging controller 110 stores the charging conditions and the parameters thus set in the storage unit 120.

The charging control unit 110 controls the charging operation of the charging control unit 110 through the key input unit 160 through the LCD display unit 152 of the output display unit 150, The open-circuit voltage, the operation state of the power conversion unit 40, the storage voltage of the energy storage unit 80, and the discharge state.

When the manual operation function of the charge control unit 110 is activated through the key input unit 160, the user directly sets the PWM control value of the power conversion unit 40 or turns on the discharge of the energy storage unit 80 .

The smoothing unit 30 may be provided to suppress the input voltage variation of the power supply unit 10 supplied to the power conversion unit 40. [

The filter unit 50 may be installed to remove noise generated by the switching operation in the power conversion unit 40 and output the noise.

The reverse current prevention unit 60 may be provided to prevent current from flowing back from the energy storage unit 80 when the power input from the power supply unit 10 is insufficient.

The control power supply unit 140 receives power from the energy storage unit 80 and supplies driving power to the charge control unit 110.

The load switch 90 is interposed between the energy storage unit 80 and the load 100 to interrupt the output of the energy storage unit 80. Therefore, when the charge control unit 110 lowers the input voltage inputted from the input power detecting unit 20 to a voltage lower than the set voltage, for example, the operation of the solar street lamp or the solar light security lamp The load switch 90 is turned on to switch to the discharge state and the lamp or the security lamp is operated by the electric power charged in the energy storage unit 80. [

In addition, when the charge control unit 110 lowers the storage voltage inputted from the storage voltage detector 130 to the minimum discharge voltage or less, the discharge switch 90 can be shut off to prevent the over discharge.

As described above, according to the hybrid charging apparatus according to the embodiment of the present invention, the hybrid charging apparatus can charge the energy storage unit of the hybrid type including the battery and the capacitor with the maximum generated power of the input power by using the power converter The hybrid charging device allows the battery and the capacitor to be charged at the same time, maximizing the benefits of the battery and the capacitor, as well as maintaining their original service life.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: power supply unit 20: input power detection unit
30: Smoothing unit 40: Power conversion unit
50: filter section 60: reverse current blocking section
70: output power detection unit 80: energy storage unit
90: Load switch 100: Load
110: charge controller 120:
130: storage voltage detection unit 140: control power supply unit
150: output display 152: LCD display
155: LED display unit 160: key input unit

Claims (10)

An input power detecting unit for detecting a characteristic of an input power supplied from a power unit by solar power generation;
A power conversion unit for stepping up or down the voltage supplied from the power supply unit and outputting the voltage to the energy storage unit;
An output power detector for detecting a characteristic of the output power outputted from the power converter;
A storage voltage detecting unit for detecting a storage voltage stored in the energy storage unit;
A charge controller for controlling the operation of the power converter according to characteristics of an input power source input from the input power detector and the output power detector according to charging conditions;
An output display unit for displaying an operation state and a setting state of the charge control unit; And
And a key input unit for setting the charging condition to the charge control unit and selecting a function of the charge control unit,
Wherein the energy storage unit is a hybrid type in which a capacitor and a capacitor connected in series are connected in parallel so that a plurality of summed voltages are greater than a voltage of the battery,
Wherein the charging condition includes a charging end voltage, a maximum charging voltage, a maximum power point of the input power source, and a minimum discharge voltage of the energy storage unit,
Further comprising a load switch interposed between the energy storage unit and the load for interrupting the output of the energy storage unit,
Wherein the charge control unit drives the power conversion unit to increase or decrease the voltage supplied from the power supply unit and output to the energy storage unit when the input voltage inputted from the input power detection unit exceeds the set voltage, Wherein the power supply unit supplies a voltage to the energy storage unit when the voltage is equal to or lower than the set voltage and outputs a voltage supplied from the power supply unit to the energy storage unit, And a control unit for turning off the load switch when the storage voltage input from the storage voltage detector is lower than the minimum discharge voltage, determining a chargeable state of the energy storage unit based on a voltage value input from the storage voltage detector, .
Further comprising a smoothing unit for suppressing a variation of an input voltage of the power supply unit supplied to the power conversion unit,
Further comprising a filter unit for removing noise generated in the power conversion unit and outputting the noise,
And a reverse current blocking unit for blocking the current from flowing back from the energy storage unit,
And a control power supply unit for receiving power from the energy storage unit and supplying driving power to the charge control unit.
delete The charge control unit according to claim 1, wherein the charge control unit compares an input voltage input from the input power detection unit and an output voltage input from the output power detection unit so that a maximum power point of the input power is maintained, And a charging device for charging the battery.
delete delete delete delete delete 2. The apparatus of claim 1, wherein the output display unit displays an operation state and a setting state of the charge control unit on an LCD panel; And an LED display unit for displaying an operation state of the charge control unit with an LED.
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KR1020150113596A 2015-08-12 2015-08-12 Apparatus for charging hybrid type KR101663991B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018088688A1 (en) * 2016-11-09 2018-05-17 삼성에스디아이주식회사 Energy storage apparatus
KR20190028899A (en) * 2017-09-11 2019-03-20 주식회사 경일그린텍 Hybrid Energy storage system for charging and discharging Solor photovoltaic energy
KR20190076403A (en) * 2017-12-22 2019-07-02 주식회사 경일그린텍 Hybrid solar energy storage apparatus with charging and discharging
KR102033551B1 (en) * 2018-06-25 2019-10-17 주식회사 경신 Apparatus for charging solar energy and control method thereof
KR20200000831A (en) * 2019-10-04 2020-01-03 주식회사 경신 Apparatus for charging solar energy
KR102064433B1 (en) 2019-10-04 2020-01-10 주식회사 경신 Apparatus for charging solar energy

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Publication number Priority date Publication date Assignee Title
JP2003111301A (en) * 2001-09-28 2003-04-11 Sanyo Electric Co Ltd Power unit for solar battery
KR20040058151A (en) * 2004-06-11 2004-07-03 오진석 PV power generation by maximum power point tracking
JP2008061283A (en) * 2006-08-29 2008-03-13 Power System:Kk Capacitor charging apparatus
KR20120131627A (en) * 2011-05-26 2012-12-05 충북보건과학대학교 산학협력단 Solar Light System Regulating Voltage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003111301A (en) * 2001-09-28 2003-04-11 Sanyo Electric Co Ltd Power unit for solar battery
KR20040058151A (en) * 2004-06-11 2004-07-03 오진석 PV power generation by maximum power point tracking
JP2008061283A (en) * 2006-08-29 2008-03-13 Power System:Kk Capacitor charging apparatus
KR20120131627A (en) * 2011-05-26 2012-12-05 충북보건과학대학교 산학협력단 Solar Light System Regulating Voltage

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018088688A1 (en) * 2016-11-09 2018-05-17 삼성에스디아이주식회사 Energy storage apparatus
KR20190028899A (en) * 2017-09-11 2019-03-20 주식회사 경일그린텍 Hybrid Energy storage system for charging and discharging Solor photovoltaic energy
KR101979232B1 (en) * 2017-09-11 2019-05-16 주식회사 경일그린텍 Hybrid Energy storage system for charging and discharging Solor photovoltaic energy
KR20190076403A (en) * 2017-12-22 2019-07-02 주식회사 경일그린텍 Hybrid solar energy storage apparatus with charging and discharging
KR102050993B1 (en) * 2017-12-22 2019-12-03 (주)경일그린텍 Hybrid solar energy storage apparatus with charging and discharging
US10749352B2 (en) 2017-12-22 2020-08-18 Kyung Il Green Tech Co., Ltd. Hybrid charging/discharging solar energy storage apparatus
KR102033551B1 (en) * 2018-06-25 2019-10-17 주식회사 경신 Apparatus for charging solar energy and control method thereof
KR20200000831A (en) * 2019-10-04 2020-01-03 주식회사 경신 Apparatus for charging solar energy
KR102064433B1 (en) 2019-10-04 2020-01-10 주식회사 경신 Apparatus for charging solar energy
KR102077020B1 (en) 2019-10-04 2020-02-13 주식회사 경신 Apparatus for charging solar energy

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