KR20200034875A - Energy harvesting sheet for vehicles - Google Patents

Abstract

The present invention relates to a vehicle energy harvesting sheet disposed inside a vehicle seat, which includes: an elastic energy collection unit which is formed in the form of a fabric in which a first fiber and a second fiber are woven, wherein the first fiber is composed of a piezoelectric element to generate power when stress changes, and the second fiber is made of an elastic material to provide restoring force during compression; and a frictional electricity energy collection unit in which a film-shaped dielectric layer and a fiber layer made of a plurality of elastic materials are disposed to be adjacent to each other, wherein the dielectric layer and the fiber layer contain dielectric materials having different polarities to generate power according to a change in a contact area between the dielectric layer and the fiber layer during compression.

Description

Energy harvesting seat for vehicles {ENERGY HARVESTING SHEET FOR VEHICLES}

The present invention relates to an energy harvesting sheet for a vehicle having a high energy generation rate by simultaneously generating electricity by piezoelectric and triboelectric electricity by vibration of a vehicle by including an elastic energy collecting portion and a triboelectric energy collecting portion.

External power supplies, such as batteries for driving sensors and portable electronic devices, are subject to regular replacement, maintenance costs, and environmental issues. As one of the alternatives, an energy harvesting technique for supplying semi-permanent energy without an external power supply has been proposed.

Energy harvesting technology is a technology that collects various external energy such as sun, wind, waves, vibrations, and human body movements and converts them into electrical energy. Since these technologies convert external energy into electrical energy, they are excellent in stability, security and sustainability of energy supply, and are in the spotlight as eco-friendly energy technologies. Recently, attempts have been made to apply this energy harvesting technology to automobiles. Specifically, Toyota announced a technology to collect energy by receiving solar light while driving by installing a solar panel plate outside the vehicle. In addition, BMW announced a technology to capture energy by attaching a thermoelectric element to the exhaust pipe. However, conventional energy harvesting technologies for vehicles have limitations in capturing energy due to environmental factors outside the vehicle.

As an alternative to this, energy harvesting technology using vibration, friction, piezoelectricity, etc. generated in a vehicle has been proposed. Specifically, in the technique of collecting energy through vibration, the position of the coil and the magnet wrapped around some devices of the vehicle changes when the suspension vibrates, thereby changing the magnetic field and thereby generating electric energy using potential difference. In addition, in the technique of collecting energy through piezoelectricity, the electric field is formed by an electric dipole phenomenon in which positions of positive and negative charges are shifted as the material is deformed by an external force.

However, the collection of vibrational energy through a magnetic field has a disadvantage in that the voltage produced is very low compared to other energy harvesting techniques, and the energy harvesting technique using the piezoelectric technique is usually applied to tires, dampers, etc., when applied to tires There is a disadvantage that durability is poor due to continuous friction with the ground, and when applied to dampers, etc., there is a limit to large area.

KR 10-1813731 B1 KR 10-1023712 B1

The present invention has been proposed to solve this problem, and is intended to provide an energy harvesting sheet for a vehicle that can produce electric energy without being affected by environmental factors and has excellent durability by applying it to a seat inside a vehicle.

In order to achieve the above object, the energy harvesting sheet for a vehicle according to the present invention is in the form of a woven fabric in which the first fiber and the second fiber are woven, and the first fiber is composed of a piezoelectric element to perform power generation in the event of stress change. 2 The fiber is formed of an elastic material, and an elastic energy collecting part providing a restoring force upon compression; And a film-shaped dielectric layer and a fiber layer composed of a plurality of elastic materials are disposed to be adjacent to each other, and the dielectric layer and the fiber layer contain dielectric materials having different polarities, thereby generating friction according to a change in the contact area between the dielectric layer and the fiber layer during compression. Includes; electrical energy collection unit, is disposed inside the vehicle seat.

The energy harvesting seat for a vehicle may have an elastic energy collecting portion disposed on the upper portion and a triboelectric energy collecting portion disposed below the elastic energy collecting portion.

The elastic energy collecting unit may further include a skin layer disposed on the surface of the first fiber exposed to the outside.

The skin layer may be formed of a material having insulation and elasticity.

The second fiber is made of a material having insulation and elasticity, and may have a hollow structure.

The dielectric layer may include an insulating layer made of an insulating material, an electrode disposed on one surface of the insulating layer, and a dielectric material layer disposed on the other surface of the insulating layer and formed of a dielectric material.

The triboelectric energy collection unit may have a fiber layer formed on the dielectric material layer.

The triboelectric energy collection unit includes a form in which a plurality of fiber layers are overlapped, and adjacent fiber layers may include dielectric materials having different polarities.

The triboelectric energy collection unit may be provided with a dielectric layer on each outer surface of the outermost fiber layer.

The fiber layer may be formed of a plurality of elastic bodies formed of an elastic material and coated with a dielectric material.

The triboelectric energy collection unit includes a form in which a plurality of fiber layers are superimposed, and each fiber layer is formed by arranging a plurality of elastic bodies in parallel, and adjacent fiber layers may intersect the direction in which the elastic bodies are disposed.

The triboelectric energy collection unit may further include a protective layer made of a material having insulation properties on one surface and the other surface of the outermost parts.

The vehicle energy harvesting seat may include a plurality of triboelectric energy collection units.

The energy harvesting sheet for a vehicle of the present invention includes an elastic energy collecting portion and a triboelectric energy collecting portion, so that the generation of piezoelectric and triboelectric electricity simultaneously occurs due to vibration of the vehicle, resulting in a high energy collection rate. In addition, the energy harvesting seat for a vehicle of the present invention is capable of energy collection even when a large external force is applied, and is applied to a seat inside a vehicle to continuously collect energy without being restricted by time and environmental factors.

1 is a cross-sectional view of a vehicle energy harvesting sheet according to an embodiment of the present invention.
2 and 4 are cross-sectional views of an elastic energy collection unit according to an embodiment of the present invention.
3 is a photograph of an elastic energy trap according to an embodiment of the present invention.
5 and 7 are cross-sectional views of a triboelectric energy collection unit according to an embodiment of the present invention.
6 is a photograph of a triboelectric energy collection unit according to an embodiment of the present invention.
8 and 10 are graphs of the relationship between the applied force and the collected voltage in the elastic energy collector and the triboelectric energy collector of Example 1 of the present invention.
9 and 11 are graphs showing the relationship between the applied force and the collected current in the elastic energy trap and the triboelectric energy trap in Example 1 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and the contents described in other drawings may be cited and described under these rules, and repeated contents that are deemed to be obvious to those skilled in the art or may be omitted.

“Including” in the present specification means that other components may be further included unless otherwise specified. In addition, it should be understood that all numbers and expressions indicative of the amount of ingredients, reaction conditions, and the like described in this specification are modified in all cases with the term "about" unless otherwise specified.

1 is a cross-sectional view of an energy harvesting sheet for a vehicle according to an embodiment of the present invention, FIGS. 2 and 4 are cross-sectional views of an elastic energy collection unit according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. According to the elastic energy capture portion photograph, Figures 5 and 7 is a cross-sectional view of the friction battery energy collecting portion according to an embodiment of the present invention, Figure 6 is a photograph of a triboelectric energy collecting portion according to an embodiment of the present invention.

Referring to Figure 1, the vehicle energy harvesting sheet 10 according to the present invention is a first fiber 110 and the second fiber 120 is a woven fabric form, the first fiber 110 is composed of a piezoelectric element The elastic energy collection unit 100 which is formed to be elastic when the stress is changed, and the second fiber 120 is formed of an elastic material to provide resilience upon compression; And the film-shaped dielectric layers 211 and 212 and the fiber layers 260 composed of a plurality of elastic materials are disposed to be adjacent to each other, and the dielectric layers 211 and 212 and the fiber layers 260 are compressed by including dielectric materials having different polarities. Includes; a friction electric energy collecting unit 200 for generating power according to the change in the contact area between the city dielectric layers 211 and 212 and the fiber layer 260, and is disposed inside the vehicle seat.

Referring to FIG. 1, the energy harvesting sheet 10 for a vehicle may have an elastic energy collecting part 100 disposed at an upper portion, and a triboelectric energy collecting portion 200 disposed at a lower portion of the elastic energy collecting portion 100. have.

2 and 3, the elastic energy collecting unit 100 is a woven fabric in which the first fiber 110 composed of a piezoelectric element and the second fiber 120 formed of an elastic material are woven. Specifically, the elastic energy collection unit 100 may be in the form of a woven fabric in which the first fiber 110 and the second fiber 120 cross each other. That is, any one of the first fiber 110 and the second fiber 120 may be weft, and the other may be in the form of a fabric woven from warp yarn.

Referring to FIG. 4, when vertical vibration occurs due to an external force, the elastic energy collecting unit 100 is woven with the second fiber 120 and is generated while the first fiber 110 of the convex shape is unfolded flatly. Electrical energy may be generated between the electrodes 140 disposed on both sides of the first fiber 110 by the piezoelectric phenomenon due to stress. In addition, the stress applied to the first fiber 110 changes while the elastic energy collection unit 100 is stretched and bent due to vibration generated in the vehicle, and thus AC voltage / current may occur.

Referring to FIG. 3, the elastic energy collection unit 100 may include a form in which a plurality of first fibers 110 are arranged to be spaced apart from each other in parallel.

For example, the piezoelectric element of the first fiber 110 may include a piezoelectric film or a mixture of piezoelectric powder and polymer. Specifically, the first fiber 110 may be composed of a piezoelectric film including any one or more of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT).

Further, examples of the piezoelectric powder include lead zirconate titanate (PZT), barium titanate (BaTiO ₃ ), and polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE). Furthermore, the piezoelectric element may include a piezoelectric nanocomposite in which the piezoelectric powder and silicon-based elastomer are mixed, or a nanowire such as the piezoelectric nanocomposite and carbon nanotube (CNT) or silver nanowires (Ag NWs). You can also use mixed composites.

The polymer mixable with the piezoelectric powder includes, for example, polydimethylsiloxane (PDMS).

Electrodes 140, 141, and 142 may be formed on both surfaces of the first fiber 110. Specifically, the first fiber 110 may have a first electrode 141 on one surface and a second electrode 142 on the other surface. The first electrode 141 and the second electrode 142 may perform a function of providing electrical energy generated by the first fiber 110 to the external circuit from deformation due to external force.

In addition, the first electrode 141 and the second electrode 142 are electrically connected, and may further include a storage circuit (not shown) for storing electrical energy produced by the elastic energy collecting unit 100 (FIG. 4). Specifically, the first electrode 141 and the second electrode 142 may provide electrical energy generated by the first fiber 110 from deformation due to external force to the storage circuit (not shown).

The first electrode 141 and the second electrode 142 may be formed of various conductive materials. For example, the material of the first electrode 141 and the second electrode 142 may include metal, conductive polymer, and the like. In addition, the first electrode 141 and the second electrode 142 may be disposed on the surface of the first fiber 110 in various forms capable of providing the external circuit with the electric energy generated by the first fiber 110. have.

The second fiber 120 is made of a material having insulation and elasticity and may have a hollow structure. Specifically, the second fiber 120 may have a tube shape, and more specifically, may be a silicone tube.

In addition, the second fiber 120 may include one or more selected from the group consisting of natural fibers and artificial fibers. Natural fibers include, for example, plant fibers such as cotton, coir, flax, ramie grass, jute, hemp, animal fibers such as wool, goat hair, camel hair, cashmere, or mineral fibers such as asbestos. have. Artificial fibers include, for example, inorganic fibers such as metal fibers and glass fibers, or organic fibers such as polyamide fibers, acrylic fibers, and polyester fibers.

The elastic energy collection unit 100 may further include a skin layer 130 disposed on the surface of the first fiber 110 exposed to the outside.

Referring to FIG. 2, the first fiber 110 has a tensile stress in a convex upward portion and a contraction stress, that is, an opposite stress, in the concave portion downward, so that the first fiber 110 is caused by external force. As it spreads, a problem may arise in which charges cancel. Therefore, by forming the skin layer 130 on the surface of the first fiber 110 exposed to the outside, the same stress may be generated in the convex portion above and the concave portion below the first fiber 110.

The skin layer 130 may be formed of a material having insulation and elasticity. For example, the skin layer 130 may include OHP film, polycarbonate film, polypropylene film, polyethylene film, and the like.

In addition, the thickness of the skin layer 130 may be greater than the thickness of the first fiber 110.

The triboelectric energy collection unit 200 is disposed under the elastic energy collection unit 100, and usually serves to replace a sponge filling the inside of a vehicle seat. In addition, the triboelectric energy collecting unit 200 collects electric energy using charge charging and electrostatic induction (see FIG. 7).

1, 5 and 6, the triboelectric energy collecting unit 200 is disposed such that the film-shaped dielectric layers 211 and 212 and the fiber layers 260 made of a plurality of elastic materials are adjacent to each other.

The dielectric layers 211 and 212 and the fiber layer 260 include dielectric materials having different polarities, so that power generation is performed according to a change in the contact area between the dielectric layers 211 and 212 and the fiber layer 260 during compression. Referring to FIG. 7, when the external force is applied, the triboelectric energy collection unit 200 may collect electrical energy generated by contact and separation between the dielectric layers 211 and 212 and the fiber layer 260.

Referring to FIG. 4, dielectric layers 211 and 212 include insulating layers 231 and 232 made of an insulating material, electrodes 221 and 222 disposed on one surface of insulating layers 231 and 232, and insulating layers 231. , 232) and may be composed of dielectric material layers 241 and 242 formed of a dielectric material. In addition, the triboelectric energy collection unit 200 may be formed with a fiber layer (260, 261, 262) on the dielectric material layer (241, 242).

Specifically, the triboelectric energy collection unit 200 is in contact with and pressurized the dielectric material of the dielectric material layers 241 and 242 and the dielectric material of the fiber layer 260 by external force, and the positive charge (+) and It is charged with a negative charge (-) ((a) → (b)). Thereafter, when the external force is removed and the contact area between the dielectric material layers 241 and 242 and the fiber layer 260 is increased, electrons move by electrostatic induction between the dielectric material layers 241 and 242 and the electrodes 221 and 222. ((b) → (c)). At this time, the electron can move until it returns to the initial state ((c) → (d)). Then, when a force is applied again, electrons move in the opposite direction ((d) → (e)). The triboelectric energy collection unit 200 may collect electrical energy by repeating the above-described steps.

In addition, due to vibration generated in the vehicle, the dielectric layers 211 and 212 and the fiber layer 260 are repeatedly contacted and separated, so that the direction of movement of electrons is changed, which causes AC voltage / current to the triboelectric energy collection unit 200. Can occur. Furthermore, since the energy collection in the triboelectric energy collection unit 200 is generated by DC voltage / current, a bridge rectifier can be attached to the electrode to generate DC voltage / current.

The triboelectric energy collection unit 200 may include a plurality of dielectric layers 211 and 212. Specifically, the triboelectric energy collection unit 200 may include a fiber layer 260 and dielectric layers 211 and 212 formed on both sides of the fiber layer 260. That is, the triboelectric energy collection unit 200 includes a first dielectric layer 211 on the upper portion, a fiber layer 260, 261, 262 formed under the first dielectric layer 211, and a lower portion of the fiber layers 260, 261, and 262. It may include a second dielectric layer 212 formed on.

The insulating layers 231 and 232 may be made of a material having insulating properties, for example, may be made of a material having insulating properties and stretchability. For example, the insulating layers 231 and 232 may be made of an elastomer such as polyvinyl chloride (PVC) or polyimide (PE).

The electrodes 221 and 222 disposed on one surface of the insulating layers 231 and 232 may be formed of various conductive materials, for example, metal or a conductive polymer. In addition, the electrodes 221 and 222 may be disposed in various forms capable of providing electrical energy generated by contact and separation between the dielectric layers 211 and 212 and the fiber layer 260 to an external circuit.

Specifically, the triboelectric energy collection unit 200 is provided on the lower portion of the first dielectric layer 211, the fiber layers 260, 261, 262 formed under the first dielectric layer 211, and the fiber layers 260, 261, 262. The formed second dielectric layer 212 may be included, and the third electrode 221 of the first dielectric layer 211 and the fourth electrode 222 of the second dielectric layer 212 may be electrically connected (see FIG. 7).

In addition, the first dielectric material layer 241 and the fiber layers 260 and 261 of the first dielectric layer 211, and the second dielectric material layer 242 and the fiber layers 260 and 262 of the second dielectric layer 212 are mutually It may contain dielectric materials of different polarity. For example, when the first dielectric material layer 241 includes a negatively charged dielectric material, the first fiber layer 261 contacting the first dielectric material layer 241 may include a positively charged dielectric material. In addition, when the second dielectric material layer 242 includes a positively charged dielectric material, the second fiber layer 262 in contact with the second dielectric material layer 242 may include a negatively charged dielectric material.

For example, the negatively charged dielectric material may include a material for forming a negative electron affinity self-assembled monolayer, such as halogen-alkylsilane, halogenated silane, and fluorosilane. Halogen-alkylsilanes include, for example, fluoroalkylsilane (FAS), fluoroalkyltrichlorosilane, tridecafluoro-1,1,2,2-tetrahydrooxyl trichlorosilane ( and tridecafluoro-1,1,2,2-tetrahydrooctyl trichlorosilane), 1H, 1H, 2H, 2H-perfluorododecyl trichlorosilane (1H, 1H, 2H, 2H-perfluorododecyltrichlorosilane, FOTS). Moreover, a halogenated silane, for example, fluorosilane, chlorosilane, etc. are mentioned.

For example, positively charged dielectric materials include 3-aminopropyltriethoxysilane (APTES), 3-glycidoxypropyltriethoxysilane (GPTES), and 4-aminothiophenol (4-aminothiophenol). ), Cysteamine hydrochloride, and the like.

The triboelectric energy collection unit 200 includes a form in which a plurality of fiber layers 260, 261, and 262 overlap, and adjacent fiber layers 260, 261, and 262 may include dielectric materials having different polarities. 1 and 5, the triboelectric energy collection unit 200 is a type in which the first dielectric layer 211, the first fiber layer 261, the second fiber layer 262, and the second dielectric layer 212 are sequentially arranged. Including, the first fiber layer 261 and the second fiber layer 262 may include dielectric materials having different polarities.

In addition, the triboelectric energy collection unit 200 may have dielectric layers 211 and 212 disposed on outer surfaces of the outermost fiber layers 261 and 262, respectively. Specifically, the first dielectric material layer 241 and the first fiber layer 261 of the first dielectric layer 211, and the second dielectric material layer 242 and the second fiber layer 262 of the second dielectric layer 212 are Dielectric materials of different polarities may be included.

The fiber layers 260, 261, and 262 are made of an elastic material and include a dielectric material. Specifically, the fiber layers 260, 261, and 262 may be formed of a plurality of elastic bodies formed of an elastic material and coated with a dielectric material. More specifically, the fiber layers 260, 261, and 262 are made of a material having insulating properties and elasticity, and have a hollow structure and a surface may be composed of a plurality of elastic bodies coated with a dielectric material. More specifically, the fiber layers 260, 261, and 262 may be tubes coated with a dielectric material, and preferably, silicon tubes coated with a dielectric material.

Dielectric materials that may be included on the surfaces of the fiber layers 260, 261, and 262 are as described in the dielectric layers 211, 212.

In addition, the triboelectric energy collection unit 200 includes a form in which a plurality of fiber layers 261 and 262 overlap, and each fiber layer 261 and 262 is formed by arranging a plurality of elastic bodies in parallel, and adjacent fiber layers ( 261 and 262, the placement direction of the elastic body may cross each other (see FIG. 6).

Referring to FIGS. 5 and 7, the triboelectric energy collection unit 200 may further include protective layers 281 and 282 made of a material having insulation properties on one surface and the other surface of the outermost parts.

The protective layers 281 and 282 are made of an insulating material, and for example, may be made of an insulating material and a stretchable material. For example, the protective layers 281 and 282 may be made of an elastomer such as polyvinyl chloride (PVC) or polyimide (PE).

The vehicle energy harvesting sheet 10 may include a plurality of triboelectric energy collection units 200. Specifically, referring to FIGS. 1 and 5, the vehicle energy harvesting sheet 10 includes a first protective layer 281, a first dielectric layer 211, a fiber layer 260, a second dielectric layer 212, and a second protection. The layer 282 may include two triboelectric energy collection units 200 sequentially arranged.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, these examples are only for illustrating the present invention, it will be said that the scope of the present invention is not to be construed as limited by these examples.

[ Example ]

Example  1. Vehicle energy Harvesting  Sheet production

1-1: Elastic energy Capture  Produce

Polyvinylidene fluoride (PVDF) is used as the first fiber 110, silicon tubes are used as the second fiber 120, and copper and nickel are deposited on both sides of the first fiber 110 by vacuum thin film deposition. Elasticity of 25cm × 25cm (width × length) in the form of a fabric by forming the first electrode 141 and the second electrode 142 and weaving the first fiber 110 and the second fiber 120 with electrodes formed on both sides An energy collecting unit 100 was prepared (see FIG. 3).

1-2: triboelectric energy Capture  Produce

A PVC film is used as the first protective layer 281, a third electrode 221 is formed of a conductive tape under the first protective layer 281, and a PVC film is formed under the third electrode 221. A first dielectric layer 211 was prepared by forming a first insulating layer 231 and forming a first dielectric material layer 241 by coating a lower portion of the first insulating layer 231 with FAS. A plurality of silicon tubes coated with APTES on the bottom of the first dielectric layer 211 are arranged in parallel to form a first fiber layer 261, and a silicon tube coated with FAS on the bottom of the first fiber layer 261 A plurality of fibers were arranged in parallel to form a second fiber layer 262. At this time, the arrangement direction of the first fiber layer 261 and the arrangement direction of the second fiber layer 262 were arranged to cross each other. Subsequently, a second dielectric material layer 242 is formed by coating with APTES under the second fiber layer 262, and a second insulating layer 232 is formed of a PVC film under the second dielectric material layer 242. , A second dielectric layer 212 was manufactured by forming a fourth electrode 222 with a conductive tape under the second insulating layer 232. Thereafter, a second protective layer 281 was formed of a PVC film on the lower portion of the fourth electrode 222 to manufacture the triboelectric energy collection unit 200. Thereafter, two triboelectric energy collectors 200 were disposed to be symmetrical with respect to the second protective layer 281 to produce a triboelectric energy collector of 20 cm × 20 cm (horizontal × vertical) (see FIGS. 5 and 6). ).

Test example  1. Measurement of power generation

1-1: applied frequency 1 Hz

A function generator, a voltage and current meter, a current meter, an exciter, an applied force meter, and the like are installed in the elastic energy collector 100 and the triboelectric energy collector of Example 1, and a frequency of 1 Hz is used. Then, while changing the voltage applied to the vibrator and the force of the vibrator as shown in Table 1, the voltage and current amount of the electric energy collected by the elastic energy collector 100 and the triboelectric energy collector for 1 hour were measured. At this time, the measured voltage and current collected are shown in Table 1.

Voltage applied to the exciter (V _{p -p} ) 2 4 6 8 10 Force of exciter (N) 2 3.5 4.8 6 7.2 Voltage captured Elastic energy collection part (mV) 43 72 121 137 195 Friction Electric Energy Collector (mV) 62 168 314 537 680 Current collected Elastic energy collection part 23 34 64 79 94 Friction Electric Energy Collector 0.2 0.31 0.54 0.77 1.1

As shown in Table 1, as the external force applied increased, the amount of voltage and current collected by the elastic energy collector and the triboelectric energy collector increased.

1-2: applied frequency 2 Hz

The voltage and current amount of the electric energy collected by the elastic energy collection unit 100 and the triboelectric energy collector were measured in the same manner as in Test Example 1-1, except that a frequency of 2 kHz was used, and the results are shown in Table 2 Showed on.

Voltage applied to the exciter (V _{p -p} ) One 2 3 4 Force of exciter (N) 4 6.2 7.1 8 Voltage captured Elastic energy collection part (mV) 74 125 139 165 Friction Electric Energy Collector (mV) 164 332 672 846 Current collected Elastic energy collection part 34 63 71 82 Friction Electric Energy Collector 0.33 0.74 1.05 1.31

As shown in Table 2, as the external force applied increased even when the used frequency was changed, the amount of voltage and current collected by the elastic energy collector and the triboelectric energy collector increased.

1-3: applied frequency 1 kHz to 2 kHz

Electricity collected by the elastic energy collection unit 100 and the triboelectric energy collector in the same manner as in Test Example 1-1, except that a frequency of 1 GHz, 1.5 GHz or 2 GHz, and a force of 100 N to 500 N was applied. The voltage and current amount of energy were measured. At this time, the result of measuring the open voltage of the electrical energy collected by the elastic energy collecting unit 100 is shown in FIG. 8, and the result of measuring the short-circuit current is shown in FIG. 9. 10, the short-circuit current measurement results are shown in FIG.

8 to 11, as the applied force and the frequency used increased, the open voltage and short-circuit current of the electric energy collected by the elastic energy collecting unit 100 and the triboelectric energy collector also increased.

1-4: Estimated output when applied to actual driving vehicles

Assuming that a passenger with a weight of 50 kg sits on a seat, and assumes that the vehicle is traveling with an acceleration of ² m / s ² , calculating the force applied to the elastic energy collecting portion 100 and the triboelectric energy collecting machine results in 100N. At this time, the voltage, current, and power collected by the elastic energy collection unit 100 and the triboelectric energy collector for 1 hour were calculated using a frequency of 2 Hz, and the estimated values are shown in Table 3.

Voltage captured Elastic energy collection part (mV) 25 Friction Electric Energy Collector (mV) 25 Current collected Elastic energy collection part 20 Friction Electric Energy Collector 20 Power collected (mW) 0.3

10: vehicle energy harvesting sheet 100: elastic energy collection unit
110: first fiber 120: second fiber
200: triboelectric energy collection unit 211: first dielectric layer
212: second dielectric layer 221, 222: electrode
231, 232: insulating layer 241, 242: dielectric material layer
260, 261, 262: fiber layer

Claims (13)

The first fiber and the second fiber are woven fabrics, and the first fiber is composed of a piezoelectric element to perform power generation when stress is changed, and the second fiber is formed of an elastic material to collect elastic energy to provide resilience during compression. part; And
Friction electricity that performs power generation by changing the contact area between the dielectric layer and the fibrous layer when compressing by arranging the film-shaped dielectric layer and the fibrous layer composed of a plurality of elastic materials to be adjacent to each other and the dielectric layer and the fibrous layer containing dielectric materials of different polarities. Energy collecting unit; includes,
A vehicle energy harvesting seat disposed inside a vehicle seat. The method according to claim 1,
The energy harvesting sheet for a vehicle is an energy harvesting sheet for a vehicle, characterized in that an elastic energy collection part is disposed at an upper portion and a triboelectric energy collection portion is disposed at a lower portion of the elastic energy collection portion. The method according to claim 1,
The elastic energy collecting part is an energy harvesting sheet for a vehicle, further comprising a skin layer disposed on the surface of the first fiber exposed to the outside. The method according to claim 3,
The skin layer is an energy harvesting sheet for vehicles, characterized in that it is formed of a material having insulation and elasticity. The method according to claim 1,
The second fiber is composed of a material having insulation and elasticity, and has an energy harvesting seat for a vehicle, characterized in that it has a hollow structure. The method according to claim 1,
The dielectric layer comprises an insulating layer made of an insulating material, an electrode disposed on one surface of the insulating layer, and a dielectric material layer disposed on the other surface of the insulating layer and formed of a dielectric material. The method according to claim 6,
The frictional electrical energy collecting portion is an energy harvesting sheet for a vehicle, characterized in that a fiber layer is formed on the dielectric material layer. The method according to claim 1,
The triboelectric energy collecting unit includes a form in which a plurality of fiber layers are superimposed, and adjacent fiber layers include a dielectric material having different polarities. The method according to claim 8,
The frictional electrical energy collecting portion is an energy harvesting sheet for a vehicle, characterized in that a dielectric layer is disposed on an outer surface of the outermost fiber layer. The method according to claim 1,
The fiber layer is an energy harvesting sheet for a vehicle, which is formed of an elastic material and is composed of a plurality of elastic bodies coated with a dielectric material. The method according to claim 10,
The triboelectric energy collection unit includes a form in which a plurality of fiber layers are superimposed,
Each fiber layer is formed by arranging a plurality of elastic bodies in parallel, and adjacent fiber layers have an energy harvesting seat for a vehicle, characterized in that the arrangement directions of the elastic bodies intersect each other. The method according to claim 1,
The frictional electrical energy collecting part further includes a protective layer made of a material having insulation properties on one surface and the other surface of the outermost part, and has an energy harvesting sheet for a vehicle. The method according to claim 1,
The vehicle energy harvesting seat is a vehicle energy harvesting seat, characterized in that it comprises a plurality of triboelectric energy collection.

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