KR20210085280A - Solid wireless power transmission module and charging apparatus for charging electric transportation means - Google Patents

Abstract

The present invention relates to a three-dimensional wireless power transmission/reception module and charging device for charging an electric movement means for an electric movement means moved by an electric power such as a personal electric locomotive, an electric vehicle, and the like. Provided is the three-dimensional wireless power transmission/reception module comprising: a magnetic induction core having a three-dimensional shape in which an inner side becomes a core coil winding part and forming a magnetic induction flow path; a tubular bobbin wrapped around the core coil winding part so as to form a bobbin coil winding part and coupled to the magnetic induction core; and a transmission/reception core module formed of a coil wound around the bobbin coil winding part. Therefore, the present invention is capable of providing an effect of further significantly improving an efficiency of wireless charging.

Description

Three-dimensional wireless power transmission/reception module and charging device for charging electric vehicles {SOLID WIRELESS POWER TRANSMISSION MODULE AND CHARGING APPARATUS FOR CHARGING ELECTRIC TRANSPORTATION MEANS}

The present invention relates to a wireless charging device for an electric mobile means, and more particularly, a three-dimensional wireless power transmission/reception module and charging device for charging an electric mobile means for an electric mobile means moved by electric power such as a personal electric vehicle or an electric vehicle is about

Recently, environmental problems such as global warming and abnormal temperature due to the use of fossil fuels are occurring, and research on transportation means using electric power is actively conducted along with the development of eco-friendly energy technology to respond to this, thereby In addition, the spread of transportation means using electric power is also being actively made.

Accordingly, it has been required to easily charge the power that is the power of the electric vehicle, and in order to meet this demand, wireless charging using RF wireless power transmission technology, for example, a technology for wirelessly transmitting power by magnetic induction method. devices were provided.

The above-described magnetic induction type wireless power transmission technology is advantageous in designing to have high charging efficiency, and in order to apply the magnetic induction method, it is required to develop a high-efficiency magnetic field induction material. In the case of the prior art, a transmission/reception pad that generates a magnetic field for wireless power transmission was manufactured in a plate shape using a ferrite material with high relative magnetic permeability such as MnZn ferrite material. , it has the disadvantage of being broken by vibration or impact.

Accordingly, there is a demand for the development of a non-ferritic or soft magnetic polymer composite material for manufacturing a pad for wireless power transmission and reception that has excellent processability and moldability and does not cause damage during driving. are doing

In addition, in the case of wireless power charging devices using magnetic induction of the prior art, the magnetic flux focusing efficiency is lowered by manufacturing the transmission/reception pad in a plate shape, and the strength is weak, resulting in greater effort and cost for developing the transmission/reception pad material there was

Republic of Korea Patent Publication No. 10-2019-0023217

Accordingly, the technical problem of the present invention is to solve the problems of the prior art described above, and three-dimensional wireless power for charging electric mobile means having a three-dimensional structure that improves magnetic flux focusing efficiency and improves wireless power transfer efficiency by magnetic induction method It is a task to be solved to provide a transmission/reception module and a charging device.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical object, an embodiment of the present invention includes a magnetic induction core having a three-dimensional shape in which the inner side is a core coil winding portion and forming a magnetic induction flow path; a tubular bobbin wrapped around the core coil winding to form a bobbin coil winding portion and coupled to the magnetic induction core; and a coil wound around the bobbin coil winding unit; provides a three-dimensional wireless power transmission/reception module, characterized in that it comprises a transmission/reception core module formed of.

The magnetic induction core is characterized in that it has a 'U'-shaped three-dimensional shape in which both upper and lower end portions function as a transmission/reception pad, and a region between the upper and lower portions serves as the core coil winding portion.

The magnetic induction core is characterized in that it is made of a magnetic induction core of a soft magnetic polymer composite material.

The magnetic induction core may further include a ferritic magnetic induction core positioned inside the soft magnetic polymer composite magnetic induction core in a shape corresponding to the shape of the magnetic induction core.

The magnetic induction core may further include one or more ferritic block magnetic induction cores disposed inside the soft magnetic polymer composite magnetic induction core to have the shape of the magnetic induction core.

The three-dimensional wireless power transmission/reception module of the electric moving means includes: a core module mounting groove in which the core module is mounted; and a pair of magnetic alignment body mounting grooves positioned on both sides of the core module mounting groove and mounted with an alignment magnetic body; characterized in that it further includes a case formed thereon.

In order to achieve the above technical problem, another embodiment of the present invention is provided with a three-dimensional wireless power transmission and reception module, a wireless power transmitter for wirelessly transmitting power by electromagnetic induction; and a wireless power charging unit that includes the three-dimensional wireless power transmission/reception module and receives power from the wireless power transmission unit by electromagnetic induction to perform charging after being mounted on the electric moving means, wherein the three-dimensional wireless power transmission/reception module includes: , It provides a wireless power charging device, characterized in that the upper and lower both end portions are configured to include a magnetic induction core having a 'C'-shaped three-dimensional shape functioning as a transceiver pad.

Embodiments of the present invention, by improving the magnetic flux focusing efficiency by controlling the three-dimensional shape of the magnetic induction core for magnetic induction charging applied to the battery wireless charging device of the electric mobile means, the development of a separate magnetic induction new material is performed. Without this, it provides the effect of performing high-efficiency wireless power transmission.

In addition, the present invention solves the problem of brittleness of the ferritic material and compensates for the low specific permeability of the non-ferritic material by applying a composite of a ferrite material and a soft magnetic polymer composite material as a magnetic induction core material. Thus, it provides the effect of further significantly improving the wireless charging efficiency.

1 is a view showing a three-dimensional wireless power transmission/reception module 100 for electric movement means according to an embodiment of the present invention.
2 is a perspective view of a wireless power transmission/reception module case 150 .
3 is a SEM of the Fe-Si-Al flake (a) and the composite magnetic induction core 110 (b), which are the material of the composite magnetic induction part 111 configured in the three-dimensional wireless power transmission/reception module 100 of FIG. 1 . Picture.
4 is a perspective view of magnetic induction cores 110 , 110a , 110b according to an embodiment of the present invention.
5 is a view showing an assembly sequence of the three-dimensional wireless power transmission/reception module 100 of FIGS. 1 to 4 .
Figure 6 is a functional block diagram of the three-dimensional wireless charging device 20 for charging electric transportation means according to an embodiment of the present invention.
7 is a view showing a state in which the wireless power transmitter 200 and the wireless power charger 300 of FIG. 6 are mounted on the cradle 10 and the EPV 400 which is an embodiment of the electric moving means.
8 is a diagram illustrating a state in which the wireless power transmitter 200 and the wireless power charger 300 of the three-dimensional wireless power charging device 20 are close to each other.
9 is a diagram illustrating a process in which an EPV is aligned to a position for wireless power charging by an alignment magnetic material.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when it is said that a part "includes" a certain component, it means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram illustrating a three-dimensional wireless power transmission/reception module 100 of an electric moving means according to an embodiment of the present invention, and FIG. 2 is a perspective view of a wireless power transmission/reception module case 150 .

1 and 2, the wireless power transmission/reception module 100 has a three-dimensional shape in which an inner side is a core coil winding unit 112 and a magnetic induction core 110 forming a magnetic induction flow path, and a bobbin coil winding unit A transmission/reception core including a tubular bobbin 120 that surrounds the core coil winding unit 112 to form a 122 and is coupled to the magnetic induction core and a coil 130 wound around the bobbin coil winding unit 122 . It may be configured to include a module 201 and a case 150 in which the transmission/reception core module 201 is mounted.

In the above configuration, as having a structure for increasing the magnetic flux focusing efficiency of the magnetic induction core 110, as shown in FIG. 1, both upper and lower end portions function as transmission/reception pads, and the concave portion forms the core coil winding portion 112. It is characterized in that it has a C'-shaped three-dimensional shape. In this case, the magnetic induction core 110 may be manufactured to have a divided structure for moldability, transportability, storage, or assembling property, such as preventing damage during molding.

The magnetic induction core 110 may be made of a soft magnetic polymer composite material.

As an example, the material of the magnetic induction core 110 is manufactured by including FeSiAl flakes containing 8.5 to 9.5 wt% Si-4.5 to 5.8 wt% Al with respect to Fe, a binder, and a dispersant to increase the magnetic permeability to increase the magnetic permeability It may be configured to secure up to 3,000 μ.

3 is an SEM photograph of FeSiAl flakes (a) and composite magnetic induction cores 110 (b), which are materials of the composite magnetic induction part 111 configured in the three-dimensional wireless power transmission/reception module 100 of FIG. 1 .

3, the FeSiAl flakes made of the magnetic induction core 110 are bal. Grind a Sandus alloy of Fe-9.1%wtSi-5.3wt%Al composition and use an attrition mill at a rotation speed of 400r/min, a ball to powder ratio of 10:1, anhydrous ethanol (anhydrous ethanol) was used as a solvent and milled for 10 hours to prepare sandust flake powder having a thickness of 0.5 to 1.5 μm, as shown in FIG. 3 (a).

An example of the sandust flakes is based on the total weight of Si 9.1 wt%, Al 5.3 wt%, O < 0.2 wt%, C <0.08 wt%, P < 0.03 wt%, S < 0.002 wt%, Mn < 0.08 wt%, and the remainder may have a composition of Fe (bal.) and unavoidable impurities.

The permeability characteristics according to the powder form of Sandust are superior to flakes, and in the embodiment of the present invention, based on the Sandust composition, which can have the highest magnetic permeability in the frequency band to be finally used for wireless power transmission, A flake powder was prepared. The wireless power transmission/reception module 110 was manufactured using a composite material having excellent impact resistance manufactured by mixing the prepared flake powder with a binder and a solvent and then heating and compression molding.

In addition, the magnetic powder constituting the soft magnetic polymer composite material may include sendust, Fe-Si-Cr, Ni-Mo-Fe (molypermalloy powder, MPP), or Fe-Ni. In addition, the binder may include Ethylene Propylene Diene Monomer (EPDM), acrylonitrile-butadiene rubber (NBR), advanced composite material (ACM), chlorinated polyethylene (CPE), an acryl-based compound or a urethane-based compound.

In the three-dimensional wireless power transmission/reception module 100 for charging electric mobile means of an embodiment of the present invention of the configuration of FIGS. 1 to 3 described above, the magnetic induction core 110 has various structures to increase wireless power transmission efficiency. can

4 is a perspective view of the magnetic induction cores 110 , 110a , 110b according to an embodiment of the present invention.

The magnetic induction core 110 may be manufactured as a composite material magnetic induction core 111 having a three-dimensional shape of a 'C' only with a soft magnetic polymer composite material, as shown in FIG. 4A .

Alternatively, the magnetic induction core may be molded to further include a ferrite-based core in the soft magnetic polymer composite magnetic induction core 111 in order to increase the magnetic permeability.

Specifically, as shown in FIG. 4(b), the magnetic induction core has a shape corresponding to the shape of the magnetic induction core 110, and the soft magnetic polymer composite material magnetic induction core 111 made of the soft magnetic polymer composite material. ) may be composed of a magnetic induction core (110b) further comprising a ferritic magnetic induction core (113) positioned inside.

In addition, as shown in (c) of FIG. 4 , the magnetic induction core is at least one ferritic which is disposed inside the magnetic induction core 111 of the soft magnetic polymer composite material to have the shape of the magnetic induction core 110 . It may be configured as a magnetic induction core 110c including block magnetic induction cores 115 .

4, the soft magnetic polymer composite material provides workability, formability, ductility, and the like by a plurality of heterogeneous material core arrangement structures of the magnetic induction cores 110, 110a, and 110b as shown in FIG. 4, and the ferritic magnetic induction core 113 or The ferritic block magnetic induction cores 115 provide high relative magnetic permeability to compensate for the low relative magnetic permeability of the soft magnetic polymer composite material.

In addition, as shown in FIGS. 1 to 3 , the magnetic induction cores 110 , 110a , 110b have a 'C'-shaped three-dimensional shape without being restricted in thickness, and magnetic flux at the ends of the upper and lower ends of the 'C' shape. Since the outgoing and coming in, the leakage of magnetic flux is reduced compared to the conventional flat pad structure, and the magnitude of the magnetic flux is also increased, thereby remarkably improving the wireless power transmission efficiency.

In the above configuration, the material of the ferritic magnetic induction core 113 and the ferritic block magnetic induction core 115 may be Mn-Zn, Ni-Zn-based ferrite, flexible or ferrite.

Due to the three-dimensional structure of the magnetic induction cores 110, 110a, and 110b as described above and the composite application structure of the ferritic material and the soft magnetic polymer composite material, without performing the development of a new material with high specific permeability, conventional development It is possible to manufacture a wireless power transmission/reception module with improved wireless power transmission efficiency by concentrating magnetic flux and compensating for non-permeability while applying the materials used.

5 is a diagram illustrating an assembly sequence of the three-dimensional wireless power transmission/reception module 100 of FIGS. 1 to 4 .

In the case of the embodiment of the present invention, the bobbin 120 shields the magnetic field to reduce magnetic flux leakage of the magnetic induction core 110 , and is manufactured in a tubular shape and the core coil winding part 112 of the magnetic induction core 110 . ) is bound to In this case, the bobbin 120 may be manufactured in a vertically divided structure in order to facilitate coupling with the magnetic induction core 110 .

As shown in FIG. 5A , the core coil winding part 112 of the magnetic induction core 110 ( 110b , 110c ) is inserted and mounted in the lower bobbin 120 of the manufactured bobbin 120 . Thereafter, as shown in FIG. 5B , the core coil winding unit 112 of the magnetic induction core 110 is shielded by coupling the upper bobbin 120 with the lower bobbin 120 to shield the core coil winding unit 112 . ) to reduce magnetic flux leakage. Next, as shown in FIG. 5C , by winding the coil around the bobbin coil winding unit 122 , the transmission/reception core module 101 is manufactured. The manufactured transmission/reception core module 101 is manufactured as a three-dimensional wireless power transmission/reception module 100 by being mounted in the transmission/reception core module mounting groove 151 of the case 150, as shown in FIG. Thereafter, the magnetic alignment body 160 is inserted and mounted in each of the alignment magnetic body mounting grooves 153 of the case 150 so that the alignment for charging is automatically performed.

The three-dimensional wireless power transmission/reception module 100 having the configuration of FIGS. 1 to 5 described above is mounted in the wireless power transmission unit 200 and the wireless power charging unit 300 of the wireless charging device, respectively, to transmit and receive wireless power to wirelessly charge power. It is manufactured as a wireless power charging device that performs

6 is a functional block diagram of the three-dimensional wireless charging device 20 for charging electric transportation means according to an embodiment of the present invention.

6 and the wireless power charging device 20 of an embodiment of the present invention is installed on a cradle or a charging mechanism to transmit wireless charging power by electromagnetic induction, and is installed on the wireless power transmitter 200 and the electric movement means for electromagnetic induction It is characterized in that it is configured to include a wireless power charging unit 300 that performs charging by receiving power from the wireless power transmitting unit 200 by the action.

The wireless power transmitter 200 receives commercial power and performs compensation such as power factor improvement, then converts it into a primary DC current for charging and outputs the primary converter 210, and receives the primary DC current A primary inverter unit 220 for converting and outputting primary AC current for wireless power transmission, and a wireless power transmission module (second unit 230) for transmitting the primary AC power of the primary inverter unit 220 in an electromagnetic induction method ) and a transmitter control unit 201 for controlling the operation of the wireless power transmitter 200 may be configured.

In addition, the wireless power charging unit 300 includes a wireless power receiving module 330 that receives and outputs the charging power transmitted from the wireless power transmitting unit 200 by electromagnetic induction, and the wireless power receiving module 330. In order to increase the power transfer capacity of the charging power, the secondary converter unit 320 converts and outputs the secondary DC current for charging after performing compensation for adjusting the LC resonance cycle, and receives the secondary DC current and receives the rechargeable battery A charging connection unit 360 configured to include a charging circuit unit 310 for performing charging, and connected to a rechargeable battery 350 that is additionally formed integrally or a rechargeable battery of an external electric moving means to perform charging. ) may be configured to further include any one of.

The primary converter unit 210 receives a commercial AC 220 V or 380 V input, converts it into a primary DC current such as DC 300 V for charging, and outputs it, and uses a magnetic induction method (IPT: Inductive Wireless Power Transfer). In power transmission, it may be configured to compensate for reactive power so that efficient power transmission can be performed.

The primary inverter unit 220 is configured to include an inverter switch and a gate drive circuit to convert the primary DC current into primary AC current for wireless power transmission after receiving the primary DC current.

The secondary converter unit 320 receives AC power whose power capacity is increased by LC resonance from the secondary compensation circuit unit 330 and converts it into DC power having a charging voltage such as 42V for charging the rechargeable battery. can be configured to

The charging circuit unit 310 is configured to include a charging protection circuit and a rectifying circuit including an overvoltage or overcurrent blocking circuit therein, and a rechargeable battery 34 using the charging power output from the secondary converter unit 320, 450).

The transmitter control unit 201 controls switching of switches for output power modulation (voltage, current modulation) of the primary converter unit 210 or the primary inverter unit 220 configured in the wireless power transmission unit 200, It is configured to detect the occurrence of an abnormal signal in the circuit and perform a corresponding control. For example, the transmitter control unit 201 may include a PWM circuit for performing switching control of switches for output power modulation and a trip circuit for detecting and responding to circuit abnormalities.

The charging unit control unit 301 performs switching control of switches for modulating the output power of the secondary converter unit 320 configured in the wireless power charging unit 300 , and detecting and corresponding control when an abnormal signal is generated in the circuit. configured to do For example, the charging unit control unit 301 may include a PWM circuit for controlling switching of the switches of the secondary converter unit 320 for output power modulation and a trip circuit for detecting and responding to circuit abnormalities. The trip circuits may include an over voltage trip (OVT) circuit for each voltage and an over current trip (OCT) circuit for each current.

In the above configuration, the wireless power transmission/reception module 100 according to an embodiment of the present invention described with reference to FIGS. 1 to 5 is mounted on the wireless power transmission module 230 and the wireless power reception module 330 .

7 is a view showing a state in which the wireless power transmitter 200 and the wireless power charging unit 300 of FIG. 6 are mounted on the cradle 10 and the EPV 400 as an embodiment of the electric moving means of the present invention, FIG. is a diagram illustrating a state in which the wireless power transmitter 200 and the wireless power charger 300 of the three-dimensional wireless power charging device 20 are in close proximity, and FIG. 9 is a process in which the EPV is aligned to a position for wireless power charging by an alignment magnetic material It is a drawing showing

As shown in FIG. 7 , the wireless power transmitter 200 of FIG. 6 may be mounted on the cradle 10 , etc., and the wireless power charging unit 300 may be mounted on the EPV 400 for charging a rechargeable battery.

As described above, when the user approaches the EPV 400 to the cradle 10 in the mounted state, the wireless power transmission/reception module 100 installed in the wireless power transmission unit 200 and the wireless power charging unit 300 as shown in FIG. 8 . ), the attractive force acts by the aligned magnetic materials, and the EPV 400 is guided to the charging position of the cradle 100, whereby the wireless power transmission/reception module installed in the wireless power transmission unit 200 and the wireless power charging unit 300 ( 100) are aligned for wireless power transmission and reception.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

10: cradle
20: three-dimensional wireless power charging device
100: three-dimensional wireless power transmission and reception module
101: transmit/receive core module
110, 110a, 110b: magnetic induction core
111: soft magnetic polymer composite material magnetic induction core
112: core coil winding part
113: ferritic magnetic induction core
115: ferritic block magnetic induction core
120: bobbin
122: bobbin coil winding portion
130: coil
150: case
151: Transceiver core module mounting groove
153: alignment magnetic body mounting groove
160: alignment magnetic material
200: wireless power transmitter
201: transmitter control unit
210: primary converter unit
220: primary inverter unit
230: wireless power transmission module
300: wireless power charging unit
301: charging part control unit
310: charging circuit unit
320: secondary converter unit
330: wireless power receiving module
350: rechargeable battery
360: charging connection
400: Electric Personal Vehicle (EPV)
450: EPV rechargeable battery

Claims (7)

a magnetic induction core having a three-dimensional shape whose inner side is a core coil winding portion and forming a magnetic induction flow path;
a tubular bobbin wrapped around the core coil winding to form a bobbin coil winding portion and coupled to the magnetic induction core; and
A three-dimensional wireless power transmission/reception module comprising a transmission/reception core module formed of a coil wound on the bobbin coil winding unit. According to claim 1, wherein the magnetic induction core,
A three-dimensional wireless power transmission/reception module, characterized in that it has a 'C'-shaped three-dimensional shape in which both upper and lower end portions function as transmitting/receiving pads and the region between the upper and lower portions serves as the core coil winding unit. According to claim 1, The magnetic induction core,
A three-dimensional wireless power transmission/reception module, characterized in that it is made of a magnetic induction core of a soft magnetic polymer composite material. According to claim 1, wherein the magnetic induction core,
A three-dimensional wireless power transmission/reception module, characterized in that it further comprises; a ferritic magnetic induction core positioned inside the magnetic induction core of the soft magnetic polymer composite material in a shape corresponding to the shape of the magnetic induction core. According to claim 1, The magnetic induction core,
One or more ferritic block magnetic induction cores disposed inside the soft magnetic polymer composite material magnetic induction core to have the shape of the magnetic induction core. According to claim 1,
a core module mounting groove in which the core module is mounted; and
A three-dimensional wireless power transmission/reception module, characterized in that it further includes a case in which; a pair of alignment magnetic body mounting grooves positioned on both sides of the core module mounting groove to which the alignment magnetic body is mounted. a wireless power transmission unit having a three-dimensional wireless power transmission/reception module to wirelessly transmit power by electromagnetic induction; and
A wireless power charging unit provided with the three-dimensional wireless power transmission/reception module to receive power from the wireless power transmission unit by electromagnetic induction and perform charging after being mounted on the electric moving means; and
The three-dimensional wireless power transmission/reception module,
Wireless power charging device, characterized in that the upper and lower both end portions are configured to include a magnetic induction core having a 'C'-shaped three-dimensional shape functioning as a transceiver pad.

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