KR20170008449A - Triboelectric generator based on contact-electrification using powder motion and method for manufacturing the generator - Google Patents

Triboelectric generator based on contact-electrification using powder motion and method for manufacturing the generator Download PDF

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Publication number
KR20170008449A
KR20170008449A KR1020150099649A KR20150099649A KR20170008449A KR 20170008449 A KR20170008449 A KR 20170008449A KR 1020150099649 A KR1020150099649 A KR 1020150099649A KR 20150099649 A KR20150099649 A KR 20150099649A KR 20170008449 A KR20170008449 A KR 20170008449A
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South Korea
Prior art keywords
housing
powder
electrode
contact charging
contact
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KR1020150099649A
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Korean (ko)
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KR101775116B1 (en
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최양규
김대원
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한국과학기술원
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
    • H02N1/04—Friction generators

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

According to the present invention, in a triboelectric generator with powder contact electrification, powder charged when being in contact with the inside of the housing is placed. As the charged powder moves, an asymmetrical potential difference between electrodes located in all directions of the housing to generate induced current is generated. So, external physical energy can be more easily converted into electrical energy. Also, it is possible to increase the durability of the triboelectric generator by using one of two electrification bodies required for contact electrification in the type of powder, not a solid planar structure, and to obtain high efficiency for small physical stimulation by using relatively more movable powder in response to an external physical stimulus.

Description

TECHNICAL FIELD [0001] The present invention relates to a contact charging power generator using powder motion and a method of manufacturing the same. BACKGROUND ART < RTI ID = 0.0 > [0002]

The present invention relates to a contact charging power generator, and more particularly, to a contact charging power generator, which comprises a housing receiving external physical energy, and a powder inserted in the housing and moving according to external physical energy and generating contact charging with the inner wall of the housing, To a contact charging power generator for converting physical energy into electrical energy, and a manufacturing method thereof.

In recent years, energy harvesting technology has attracted great interest due to continuous energy exhaustion and environmental pollution caused by conventional fossil fuels.

Energy Harvesting is a technology that converts the energy of solar energy, heat, physical kinetic energy, etc., which are abandoned around, into electrical energy. It is efficient in that the energy conversion process harvests environmentally friendly and abandoned energy. In addition, energy harvesting technology is also emerging as a way to supply electric power to wireless devices or remote places where it is difficult to directly supply electricity.

Recently, a new kinetic energy harvesting device called a triboelectric generator based on the contact-electrification phenomenon has been proposed. In such contact charging generators, positive charge is induced on one surface and negative charge is induced on the other surface due to contact charging phenomenon when two different surfaces are in contact. When these two surfaces are separated, a potential difference is generated by the induced charge, The flow of electrons is induced between the electrodes connected to the two surfaces. Also, when the equilibrium state is reached and the two surfaces come close to each other again, a potential difference opposite to the former is formed and the electron flow in the opposite direction is induced, so that repeated contact and separation of the two large surfaces generates repetitive voltage and current .

As described above, a contact charging generator of various structures has been proposed, which utilizes the surface charge of the two solid materials to harvest the actual physical energy. At this time, such vibration is a movement that can easily cause contact and separation, and the vibration is generated by a method in which the two planes of the solid plane structure are contacted and separated. However, when the two large bodies required for contact charging have a solid plane structure, there is a problem in that the durability of the generator due to continuous contact separation and the vibration direction capable of being converted into electric energy are limited to one direction due to the nature of the plane.

Accordingly, when the polymer powder is used instead of the existing solid plane by a method of generating an induced current, it is possible to greatly improve the durability of the contact charging power generator and to convert vibrations in various directions into electric energy, It is expected to be.

(Patent Literature)

Korean Patent Publication No. 10-2011-0132758 (published on December 09, 2011)

Therefore, in the present invention, the charged material forming the sealed housing and the housing, and the powder inserted into the housing and moving according to the physical energy to generate contact charging with the inner wall of the housing, And a method of manufacturing the same.

In addition, in the present invention, a powder contact charging electricity generator for generating charged electric charges by moving the charged powder to generate an asymmetrical potential difference between the electrodes placed on the outer surface of the housing, thereby generating an induced current, and And to provide a manufacturing method thereof.

Further, in the present invention, by using powder that is not a solid planar structure as one of the two large bodies required for contact charging, the durability of the contact charging generator is increased and the vibration of the powder within the housing is free, The present invention is to provide a powder contact-type charging generator capable of achieving high efficiency even with small physical stimulation by using a powder that is relatively easy to move relative to an external physical stimulus.

The present invention relates to a contact charging power generator using the movement of a powder, comprising: a housing; upper and lower electrodes coupled to upper and lower portions of the housing to seal the housing; Powder, at least one additional electrode formed on the outer surface of the housing, and a wiring connecting the upper electrode and the lower electrode to the additional electrode, respectively, and the housing is moved by the external physical stimulation to move the powder inside the housing Contact charging is caused by friction with the powder.

In addition, when contact charging occurs due to friction between the housing and the powder, an asymmetrical potential difference is generated between the upper electrode and the lower electrode or between mutually opposing additional electrodes formed on the outer surface of the housing, .

In addition, the powder is formed of PTFE (Polytetrafluoroethylene) or a PDMS material.

The predetermined amount is calculated and set in advance as a capacity at which the electrostatic charge is generated most by the friction with the wall inside the housing when the powder flows inside the housing.

The physical stimulation is characterized by wind, vibration or shock applied to the housing.

The upper and lower electrodes and the additional electrode may be formed of any one metal of gold (Au), copper (Cu), aluminum (Al), chrome (Cr), or nickel (Ni) As shown in FIG.

Further, the housing is characterized by being formed in a cylindrical shape or a polygonal shape.

According to another aspect of the present invention, there is provided a method of manufacturing a contact charging power generator using powder movement, comprising the steps of: forming a housing; fabricating an upper electrode and a lower electrode coupled to upper and lower portions of the housing; Inserting a predetermined amount of powder for generating contact charging; sealing the housing by coupling the upper electrode and the lower electrode to the upper and lower portions of the housing; and inserting at least one additional electrode And connecting the upper electrode, the lower electrode, and the additional electrode to each other by wiring.

According to the present invention, in the powder contact charging electric generator, by placing the powder to be charged when contacting the surface inside the housing and generating an asymmetrical potential difference between the electrodes placed on the housing surface as the charged powder moves, There is an advantage in that it is possible to convert the physical energy of the light source into electrical energy more easily.

In addition, the durability of the contact charging power generator can be increased by using powder, which is not a solid plane structure, as one of the two large magnets required for contact charging, and since vibration of powder in the housing is free, And the use of a powder that is more movable relative to an external physical stimulus has an advantage of achieving high efficiency for small physical stimulation.

1 is a perspective view of a contact charging power generator using movement of a powder according to an embodiment of the present invention,
FIG. 2 is a flow chart of a process of manufacturing a contact charging power generator according to an embodiment of the present invention,
FIGS. 3A and 3B are conceptual diagrams of induction current generation of a contact charging power generator according to an embodiment of the present invention; FIG.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

1 is a perspective view of a contact charging power generator using a movement of a powder according to an embodiment of the present invention.

1, a contact charging power generator according to the present invention includes a housing 100, a first electrode 110, a second electrode 111, a third electrode 112, a fourth electrode 113, A fifth electrode 114, a sixth electrode 115, and the like.

The housing 100 is a device for generating contact charging in the contact charging electric generator and enclosing the powder 120. In FIG. 1, the housing 100 is formed in a cylindrical shape, but the present invention is not limited thereto. That is, the housing 100 may be formed in a polygonal shape.

Also, the housing 100 may be made of, for example, a material having a relatively low electrical conductivity or an insulating material, and may be made of a material such as compressed acrylic or PVC.

In addition, it is preferable that the housing 100 is made of a material resistant to physical stimulation from the outside, and it is preferable that the powder 120 inserted into the housing 100 is sealed so as not to leak to the outside. Here, the physical stimulus may mean physical energy such as vibration or shock applied from the outside to the housing 100.

The housing 100 may be formed of a charging material that generates contact charging upon contact with the powder 120 in the contact charging generator and may contact the powder 120 inserted therein to induce a large amount of electrostatic charge It is preferable to use materials such as PTFE and PDMS which are located relatively lower in the charging column.

The first electrode 110, the second electrode 111, the third electrode 112, the fourth electrode 113, the fifth electrode 114 and the sixth electrode 115 are formed of a metal having a relatively high conductivity, An oxide, a semiconductor doped with a high concentration, or the like is preferably used. The first electrode 110, the second electrode 111, the third electrode 112, the fourth electrode 113, the fifth electrode 114 and the sixth electrode 115 may be formed of, for example, gold Au, Cu, Al, Cr, or Ni, or an oxide including ITO.

The powder 120 may be inserted into the interior of the housing 100 and the amount of the powder 120 may be generated by electrostatic charge generated by friction with the inner wall of the housing 100 when the powder 120 flows inside the housing 100 Can be calculated and set in advance as the largest capacity.

Also, it is preferred that the powder 120 use a chargeable material that can contact the housing 100 to induce a relatively large amount of charge, which can induce a large amount of electrostatic charge upon contact with the housing 100 Materials such as polytetrafluoroethylene (PTFE), PDMS, and the like, which are located relatively lower in the charging column, may be used. However, the present invention is not limited thereto.

2 is a flowchart illustrating a manufacturing process of the contact charging power generator using the movement of the powder according to the embodiment of the present invention. Hereinafter, the manufacturing process of the contact charging power generator of the present invention will be described in detail with reference to FIG.

First, a cylindrical housing 100 is manufactured (S200), and a first electrode 110 and a second electrode 111 are formed to seal the inside of the housing 100 (S202).

At this time, the housing 100 is a device for enclosing the powder 120 that generates contact charging in the contact charging electric generator. The housing 100 can be manufactured in a structure in which air can smoothly flow in and out as described with reference to FIG. 1, For example, a material having a relatively low electrical conductivity such as compressed acrylic or PVC, or an insulating material.

Then, a predetermined amount of powder is inserted into the housing 100 (S204), and then the first electrode 110 and the second electrode 111 are disposed above and below the housing 100 to form the housing 100 (S206). The third electrode 112, the fourth electrode 113, the fifth electrode 114, and the sixth electrode 115 are formed on the front, back, left, and right sides of the housing 100 as additional electrodes, (S208). In this case, in the embodiment of the present invention, four electrodes such as the third electrode 112, the fourth electrode 113, the fifth electrode 114, and the sixth electrode 115 are additionally disposed as additional electrodes. For example, However, the present invention is not limited thereto.

Next, a wire (not shown) is connected to each electrode (S210), and a charged current is accumulated as electric energy through the wiring connected to each electrode as the contact between the powder 120 and the housing 100 occurs .

FIGS. 3A and 3B illustrate an operation concept in which an induction current is generated in a contact charging generator using the movement of a powder according to an embodiment of the present invention. Hereinafter, an operation in which an induction current is generated when an external physical stimulus is applied to the contact charging generator according to an embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3B.

First, as shown in FIG. 1, when a physical stimulation from the outside is given to cause a contact charging phenomenon through contact between the powder and the housing 100, the housing 100 is positively charged, and the powder 120 is negatively charged do.

3A, when the powder 120 positioned inside the housing 100 is directed to the first electrode 110 by external physical stimulation, the negative charge of the powder 120 is screening The amount of positive charge of the second electrode 111 is reduced. As a result, a potential difference occurs between the first electrode 110 and the second electrode 111, and electrons move from the first electrode 110 to the second electrode 111 in order to achieve an equilibrium state.

Next, if the powder 120 located in the housing 100 by the physical stimulation is directed to the second electrode 111 as shown in FIG. 3B, the negative charge of the powder 120 is applied to the first electrode So that the amount of positive charge on the substrate 110 is reduced. As a result, a potential difference occurs between the first electrode 110 and the second electrode 111, and electrons move from the second electrode 111 to the first electrode 110 in order to achieve an equilibrium state.

Asymmetric screening occurs according to the movement of the powder due to the repetitive external physical stimulation. Asymmetric screening induces the flow of electrons between the first electrode 110 and the second electrode 111, It is possible to produce electricity continuously. That is, in the present invention, by placing the powder 120 to be charged when the housing 100 is in contact with the wall of the inside of the housing 100, the charged powder 120 is attracted to the housing 100 The third electrode 112, the fourth electrode 113, and the fifth electrode 114 located on the outer surface of the housing 100. The first electrode 110 and the second electrode 111 are formed on the outer surface of the housing 100, ) And the sixth electrode 115 are generated to generate an inductive current, so that continuous power generation is possible.

The operation between the first electrode 110 and the second electrode 111 may be performed between the third electrode 112 and the fourth electrode 113 and between the fifth electrode 114 and the sixth electrode 115 Respectively, and power is produced through corresponding inter-electrode interaction.

As described above, according to the present invention, in the powder contact-type electrification generator, the powder to be charged when contacting the inside of the housing is positioned and an asymmetrical potential difference is generated between the electrodes positioned above and below the housing, The external physical energy can be more easily converted into electrical energy. It is also possible to increase the durability of the contact charging generator by using powder that is not a solid planar structure by using one of the two large bodies required for contact charging and by using a fluid that is relatively more movable relative to the external physical stimulus, .

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

100: housing 110: first electrode
111: second electrode 112: third electrode
113: fourth electrode 114: fifth electrode
115: sixth electrode 120: powder

Claims (6)

A housing,
Upper and lower electrodes coupled to upper and lower portions of the housing to seal the housing,
A predetermined amount of powder for generating contact charging located inside the housing,
At least one additional electrode formed on the outer surface of the housing
And a wiring for connecting the upper / lower electrode and the additional electrode respectively
In the housing, contact electrification occurs due to friction with the powder during the movement of the powder within the housing by external physical stimulation
Contact charging generator.
The method according to claim 1,
Wherein when a contact charging occurs due to friction between the housing and the powder, a potential difference is generated between the upper and lower electrodes or between mutually opposing additional electrodes formed on the outer surface of the housing to generate an induced current. Daejeon generator.
The method according to claim 1,
The powder,
PTEE (Polytetrafluoroethylene) or a PDMS material.
The method according to claim 1,
Preferably,
Wherein the powder is previously calculated and set as a capacity at which electrostatic charge is most generated by friction with a wall inside the housing when the powder flows inside the housing.
The method according to claim 1,
Wherein the physical stimulation comprises:
Vibration or shock applied to the housing.
Forming a housing,
Fabricating an upper electrode and a lower electrode coupled to upper and lower portions of the housing,
Inserting a predetermined amount of powder for generating contact charge into the housing;
Closing the housing by coupling the upper electrode and the lower electrode to the upper and lower portions of the housing, respectively,
Forming at least one additional electrode on the outer surface of the housing,
Connecting the upper electrode, the lower electrode, and the additional electrode by wires,
Wherein the contact charging means is a contact charging device.
KR1020150099649A 2015-07-14 2015-07-14 Triboelectric generator based on contact-electrification using powder motion and method for manufacturing the generator KR101775116B1 (en)

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Publication number Priority date Publication date Assignee Title
KR20110132758A (en) 2010-06-03 2011-12-09 삼성전자주식회사 Surface having superhydrophobic and superhydrophilic region

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KR101476742B1 (en) 2013-11-14 2014-12-29 포항공과대학교 산학협력단 Method for manufacturing nano generator
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Publication number Priority date Publication date Assignee Title
KR20110132758A (en) 2010-06-03 2011-12-09 삼성전자주식회사 Surface having superhydrophobic and superhydrophilic region

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