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WO2019231223A1 - Appareil de transmission d'énergie sans fil ayant une performance exothermique améliorée - Google Patents

Appareil de transmission d'énergie sans fil ayant une performance exothermique améliorée Download PDF

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Publication number
WO2019231223A1
WO2019231223A1 PCT/KR2019/006412 KR2019006412W WO2019231223A1 WO 2019231223 A1 WO2019231223 A1 WO 2019231223A1 KR 2019006412 W KR2019006412 W KR 2019006412W WO 2019231223 A1 WO2019231223 A1 WO 2019231223A1
Authority
WO
WIPO (PCT)
Prior art keywords
main frame
coil
heat sink
wireless power
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/006412
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English (en)
Korean (ko)
Inventor
고범갑
김철호
박신호
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Publication of WO2019231223A1 publication Critical patent/WO2019231223A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Definitions

  • the present invention relates to a charger, and more particularly, to a wireless power transmission apparatus with improved heat generation performance.
  • Mobile terminals such as mobile phones, personal digital assistants (PDAs), and smart phones are battery-powered and equipped with rechargeable batteries.
  • PDAs personal digital assistants
  • a charger provided separately from the mobile terminal is required.
  • a typical charger is a wired charger, in which the charger and the mobile terminal are provided with contact terminals for connecting two devices.
  • the charger and the mobile terminal are interconnected by wires (eg, cables) through contact terminals, and are charged by supplying electricity to the battery of the mobile terminal from the charger.
  • wireless chargers capable of supplying power wirelessly to mobile terminals have been developed and are increasingly used.
  • the wireless charger and the mobile terminal do not need to configure contact terminals for interconnection, and the charging may be performed at a predetermined distance from each other.
  • Charging methods of the wireless charger may be classified into a magnetic induction method, a magnetic resonance method, and a short wavelength wireless power transmission method.
  • magnetic flux causes electromotive force to the other coil. That is, in the magnetic induction method, when the current is applied to the transmitting coil, charging is performed while the induced current is generated at the same frequency by the non-radial electromagnetic waves generated at the same frequency as the applied current.
  • the magnetic induction method has been commercialized as a wireless charging technology for mobile devices, that is, mobile terminals in accordance with the Qi regulations of the Wireless Power Consortium (WPC), and its range of application is increasing with traffic cards, RFID, and NFC systems.
  • WPC Wireless Power Consortium
  • Such a magnetic induction method has an advantage that it is easy to implement and has a very good permeability to a non-magnetic material, which can be used in the ground or in the water, but has a disadvantage of having a very short transmission distance and a low degree of freedom in alignment between coils.
  • the magnetic resonance method is characterized by using an electric or magnetic field instead of using electromagnetic waves or current.
  • Self-resonance method has the advantage of being safe to other electronic devices or human body because it is hardly affected by the electromagnetic wave problem, but can be utilized only in a limited distance and space, and has a disadvantage that the energy transfer efficiency is rather low.
  • the short wavelength wireless power transmission method takes advantage of the fact that energy can be directly transmitted and received in the form of a radio wave.
  • This technology is also called RF because it uses rectenna, a device that converts RF power directly into direct current power (a compound word of antenna and rectifier).
  • the RF method is a technology that converts AC radio waves to DC and uses them. Recently, research on commercialization has been actively conducted as efficiency is improved.
  • the wireless charger employing the above-described wireless charging schemes increases the temperature of the wireless charger while generating heat in the coil and the internal device during charging.
  • the heating of the wireless charger side affects the temperature rise of the mobile terminal, which may reduce the charging speed of the mobile terminal or stop charging.
  • an embodiment of the present invention is to provide a wireless power transmission apparatus capable of providing fast and stable wireless charging by improving heat generation performance.
  • Embodiments include a main frame having a coil seat and a cutout groove; An upper case disposed on the main frame; A PCB substrate disposed under the main frame; And a coil part electrically connected to the PCB substrate and seated on the coil seating part through the cutting groove. It provides a wireless power transmission apparatus comprising a.
  • a lower portion of the main frame may include a plurality of spacers for separating the PCB substrate.
  • the apparatus may further include at least one through hole (air passing hole) formed through the main frame.
  • a heat dissipation plate disposed between the main frame and the upper case so as to be adjacent to the coil unit, and having a heat dissipation space between the upper case and the upper case.
  • the heat sink is spaced apart from the upper case (edge) exposed to the outside (exposed); A bottom part having a coil through hole into which the coil part is inserted; And an inclined portion extending the bottom portion and the edge portion (exposed portion).
  • the inclined portion may extend to be inclined with respect to the bottom portion, and the edge portion (exposed portion) may extend from the inclined portion.
  • Through holes may be formed in the bottom portion.
  • the lower case may further include a lower case disposed below the main frame and having at least one through hole (air inlet hole) formed therein.
  • an embodiment includes a main frame having a coil seat; A coil part seated on the coil seating part; An upper case disposed on the main frame; And a heat dissipation plate disposed between the main frame and the upper case so as to be adjacent to the coil unit and having an edge portion (exposed portion) spaced apart from the upper case and exposed to the outside.
  • the PCB may further include a PCB substrate disposed below the main frame and connected to the coil unit.
  • the coil seating portion may be positioned on an upper portion of the main frame, and a cutaway groove may be formed at one side of the main frame so that the coil portion connected to the PCB substrate is installed as the coil seating portion.
  • the main frame may further include a plurality of support protrusions fixedly supporting the coil unit at an outer side of the coil seat.
  • the apparatus may further include at least one through hole (air passing hole) formed through the main frame.
  • the heat sink is a bottom portion having a coil through hole in which the coil portion is inserted; And an inclined portion extending the bottom portion and the edge portion (exposure portion).
  • the inclined portion may extend to be inclined with respect to the bottom portion, and the edge portion (exposed portion) may extend inclined from the inclined portion.
  • the bottom portion may communicate with a through hole (air passage hole) of the main frame.
  • the upper case may include a charging pad exposed to the outside; And an edge cover supporting the charging pad and spaced apart from the heat sink from the main frame.
  • the adhesive tape may have a ring shape having a hollow hole, and one side may be cut to have an opening.
  • the lower case may further include a lower case disposed below the main frame and having at least one through hole (air inlet hole) formed therein.
  • the embodiment includes a main frame having a coil seating portion, a cutting groove and a spacer; A PCB substrate disposed under the main frame; A coil part connected to the PCB board and seated on the coil seating part through the cutting groove; An upper case having a charging pad and disposed above the main frame; And a bottom portion adjacent to the coil portion, an inclined portion extending from the bottom portion, an edge portion (exposed portion) extending from the inclined portion and spaced apart from the upper case to be exposed to the outside, and And a heat sink disposed between the upper cases.
  • the apparatus may further include at least one through hole (air through hole) formed through at least one of the main frame and the heat sink.
  • the main frame may further include a plurality of support protrusions fixedly supporting the coil unit at an outer side of the coil seat.
  • the lower case may further include a lower case disposed below the main frame and having at least one through hole (air inlet hole) formed therein.
  • the coil unit is spaced apart from the PCB substrate through the main frame, and the heat dissipation area is increased by increasing the heat dissipation area through the heat sink, thereby rapidly improving the wireless charging speed. By not using it can provide a quiet, comfortable and stable charging environment.
  • FIG. 1 is a perspective view of a wireless power transmission apparatus according to an embodiment.
  • FIG. 2 is an exploded perspective view of the wireless charger of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1.
  • FIG. 4 is a partially combined perspective view of the main part of FIG. 2.
  • FIG. 5 is an enlarged view of the heat sink of FIG. 4.
  • FIG. 6 is a plan view of the heat sink of FIG. 4.
  • FIG. 7 is an operation diagram for the heat radiation of the wireless charger of FIG.
  • FIG. 10 is a graph showing a charging time and a temperature change of the wireless charger of the embodiment.
  • 11 is a graph showing the charging time and the temperature change of the wireless charger of the comparative example.
  • each layer (region), region, pattern, or structure is “on” or “under” the substrate, each layer (film), region, pad, or pattern.
  • “up” and “under” include both “directly” or “indirectly” formed through another layer. do.
  • the criteria for up / down or down / down each layer will be described with reference to the drawings.
  • the device equipped with the function of transmitting wireless power on the wireless charging system is a wireless charger, wireless power transmitter, wireless power transmitter, wireless power transmitter, wireless power transmitter, transmitter, transmitter for convenience of description.
  • a transmitter, a transmitter, a wireless power transmitter, and a wireless power transmitter are used interchangeably.
  • a representation of a device equipped with a function for receiving wireless power from a wireless power transmitter for convenience of description, a mobile terminal, a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a receiver terminal, A receiver, a receiver, a receiver, and the like may be used interchangeably.
  • the transmitter may be configured in a pad form, a cradle form, an access point (AP) form, a small base station form, a stand form, a ceiling buried form, a wall-hung form, and the like, and one transmitter is used to power a plurality of wireless power receivers. Can also be transmitted.
  • the transmitter may comprise at least one wireless power transmission means.
  • the wireless power transmission means may use various wireless power transmission standards based on an electromagnetic induction method that generates a magnetic field in the power transmitting end coil and charges using the electromagnetic induction principle in which electricity is induced in the receiving end coil under the influence of the magnetic field.
  • the wireless power transmission means may include an electromagnetic induction wireless charging technology defined by the Wireless Power Consortium (WPC) and the Power Matters Alliance (PMA), which are wireless charging technology standard organizations.
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • the receiver according to an embodiment of the present invention may be provided with at least one wireless power receiving means, and may simultaneously receive wireless power from two or more transmitters.
  • the wireless power receiving means may include an electromagnetic induction wireless charging technology defined in the Wireless Power Consortium (WPC) Qi standard and the Power Matters Alliance (PMA) standard, which is a wireless charging technology standard organization.
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • the mobile terminal as a wireless power receiver having a wireless power receiving means is a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric toothbrush, electronic tag, lighting device, remote control, fishing gear, electronic devices such as wearable devices such as smart watches, and the like, but are not limited thereto. That is, the mobile terminal may include all devices equipped with a wireless power receiver and capable of charging the battery.
  • FIG. 1 is a perspective view of a wireless power transmission apparatus according to an embodiment.
  • the wireless power transmitter 1 of the embodiment may wirelessly charge a battery of a mobile terminal (eg, a smartphone) capable of wireless charging. That is, the wireless power transmitter 1 and the mobile terminal M may each include a wireless power transmitter and a wireless power receiver to configure a wireless charging system.
  • a mobile terminal eg, a smartphone
  • the mobile terminal M and the wireless power transmitter 1 may perform a charging operation when located at a predetermined distance.
  • the wireless power transmitter 1 has a charging pad 620 on the upper case 600, and the mobile terminal M is placed on the charging pad 620 to be in contact with each other or adjacent to each other by a predetermined distance. Charging operation may be performed.
  • the wireless power transmitter 1 may charge not only one mobile terminal M but also several electronic devices at the same time.
  • the wireless power transmitter 1 may charge the battery of the mobile terminal M.
  • the wireless power transmitter 1 may use one or more of an electromagnetic induction method using an electromagnetic induction phenomenon and a magnetic resonance method for carrying power at a specific frequency.
  • the embodiment efficiently improves heat generation of the wireless power transmitter 1 generated while wirelessly charging the battery of the mobile terminal M, thereby rapidly improving the charging speed and providing a stable and comfortable charging environment.
  • FIG. 2 is an exploded perspective view of the wireless charger of FIG. 1
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1
  • FIG. 4 is a partially coupled perspective view of the main part of FIG. 2
  • FIG. 5 is a heat sink of FIG. 4.
  • 6 is a plan view of the heat sink of FIG. 4
  • FIG. 7 is an operation view of heat radiation of the wireless charger of FIG. 1.
  • the wireless power transmitter 1 of the embodiment includes a main frame 100, a PCB substrate 200, a coil unit 300, a lower case 400, and a heat sink.
  • 500, the upper case 600, the adhesive tape 700, and the like may be configured.
  • the upper case 600 may be referred to as a first case
  • the lower case 400 may be referred to as a second case.
  • the main frame 100 may be disposed at an internal center so that various components constituting the wireless power transmitter 1 may be mounted.
  • the main frame 100 may be made of a plastic material and electrically insulated from various components.
  • a plurality of coupling holes 104 may be formed in the main frame 100 to couple components such as the lower case 400, the PCB substrate 200, the heat sink 500, and the upper case 600.
  • the coupling hole 104 may be referred to as a bolt hole.
  • At least one through hole 103 or 106 may be formed through the main frame 100.
  • the through holes 103 and 106 of the main frame 100 may be referred to as air passage holes.
  • the through holes 103 and 106 are formed of a total of four slits in a pair of left and right sides around the coil seat 130, but the number and shape may be modified.
  • the through holes 103 and 106 of the main frame 100 may be in communication with the through holes 503 and 506 of the heat sink 500, respectively.
  • the through holes 503 and 506 of the heat sink 500 may be referred to as air passage holes.
  • the through holes 103, 106, 503, and 506 may help to cool the coil part 300 by providing a flow of air when the coil part 300 generates heat. This will be described later.
  • the coil seat 130 is provided on an upper portion of the main frame 100.
  • the coil part 300 is seated on the coil seating part 130.
  • the coil seating unit 130 may have various shapes in a predetermined region of the main frame 100 in consideration of the shape and size of the coil unit 300.
  • the coil seating unit 130 may have a circular shape at the upper center of the main frame 100 so that the circular coil unit 300 is seated.
  • the main frame 100 may be provided with a plurality of support protrusions 140 for fixing and supporting the coil unit 300 on the outside of the coil seat 130.
  • the support protrusion 140 may protrude by a predetermined height to an upper portion of the main frame 100.
  • the support protrusion 140 may protrude as much as the height of the coil unit 300.
  • the plurality of support protrusions 140 may be fixed to support the coil unit 300 such that the coil unit 300 is not separated from the coil seat 130 while being spaced apart at a predetermined interval to surround the coil seat 130. .
  • the number, shape, and distance of the plurality of support protrusions 140 described above may be variously modified in consideration of the position fixing and the heat generation of the coil unit 300.
  • One side of the main frame 100 is formed with a cutting groove 101.
  • the cutting groove 101 may be located in a recessed form from one side edge of the main frame 100 to the coil seat 130.
  • the coil part 300 connected to the PCB substrate 200 through the cutout 101 of the main frame 100 is a coil that is an upper part of the main frame 100 from an edge of the main frame 100.
  • the substrate 130 may be positioned while moving to the seating unit 130, and the PCB substrate 200 may be positioned below the main frame 100.
  • a lower portion of the main frame 100 may be provided with a plurality of spacer protrusions 120 for separation from the PCB substrate 200 as shown in FIG.
  • a plurality of spacer protrusions 120 may be arranged at regular intervals to support the PCB substrate 200 in a balanced manner.
  • the spacer protrusion 120 may have a protrusion shape or various shapes, sizes, and heights such as a bar and a block.
  • the main frame 100 may allow the PCB substrate 200 to operate smoothly even when the coil unit 300 generates heat by separating / separating the coil unit 300 and the PCB substrate 200 from each other. Therefore, the charging of the wireless power transmitter 1 may be stopped or the charging performance may be prevented by the heat of the coil unit 300.
  • the PCB substrate 200 includes a controller (for example, a microprocessor, etc.) for controlling the overall operation of the wireless power charging device 1, and the AC power signal to be transmitted through the coil unit 300 under the control of the controller. It may be configured to include an AC power generator (for example, an inverter, etc.) to generate a.
  • a controller for example, a microprocessor, etc.
  • AC power generator for example, an inverter, etc.
  • the PCB substrate 200 may be disposed below the main frame 100 and may be connected to the coil unit 300.
  • the coil unit 300 may be positioned to be spaced apart from the PCB substrate 200 and may be connected to the PCB substrate 200 through the connection terminal 250. Therefore, as described above, the PCB substrate 200 may be positioned to be spaced apart from the lower part of the main frame 100, and the coil part 300 may be located at the coil seating part 130 provided at the upper part of the main frame 100. have.
  • the main frame 100 may serve to block heat generated by the coil unit 300 from being transferred to the PCB substrate 200.
  • the coil unit 300 may generate an electromagnetic field and transmit a wireless power signal when power is applied.
  • the coil unit 300 may include a plurality of flat coils and shielding sheets at least partially disposed to overlap each other.
  • the plurality of flat coils may include a transmitting coil.
  • the transmission coil serves as a power transmission coil for transmitting a radio frequency signal and transmitting power to the mobile terminal (M) side, it may be referred to as a transmission coil.
  • the mobile terminal M includes a receiving coil which is provided to correspond to the transmitting coil and receives power from the transmitting coil by electromagnetic induction.
  • Such flat coils may be wound in a clockwise or counterclockwise direction to have a spiral shape such as circular, elliptical, and square having a plurality of turns.
  • the flat coils may be wound such that the central part has an empty space such as a circular, elliptical or rectangular opening.
  • the shielding sheet may be formed of a plate-like member having a predetermined area and supporting the flat coil.
  • the shielding sheet serves to shield a magnetic field generated by a radio frequency signal generated from a flat coil while being seated on a seating portion of the main frame 100.
  • One side of the coil unit 300 may be provided with a connection terminal 250 for electrically connecting both ends of the flat coil.
  • the coil unit 300 may be electrically connected to the PCB substrate 200 by the connection terminal 250, and the shielding sheet may be disposed on the coil seat 130 of the main frame 100 described above, and the coil unit 300.
  • the PCB substrate 200 may form a physical separation section with the main frame 100 interposed therebetween.
  • the lower case 400 may be disposed under the main frame 100, that is, under the PCB substrate 200.
  • the lower case 400 may protect the main frame 100, the PCB board 200, and the like from the outside with the upper case 600 to be described later.
  • the lower case 400 may have various shapes according to the appearance of the wireless power transmitter 1, and coupling parts such as bolts 404 may be installed by forming fastening grooves for connecting to other components. have.
  • At least one through hole 410 may be formed in the lower case 400 to allow air to be introduced from the outside.
  • the through hole 410 of the lower case 400 may be referred to as an air inlet hole.
  • the through hole 410 has a long hole shape and a plurality of through holes 410 may be formed in the lower side region of the lower case 400. The shape, size, and arrangement positions of the through holes 410 may be variously performed.
  • a rubber pad may be further attached to the bottom surface of the lower case 400 so as to be seated without slipping from the bottom surface of the desk or table.
  • the upper case 600 may be disposed above the main frame 100 to form a housing of the wireless power transmitter 1 together with the lower case 400. It may have various shapes according to the external shape of the wireless power transmitter 1 of the upper case 600.
  • the upper case 600 may include a charging pad 620 exposed to the outside and an edge cover 610 supporting the charging pad 620.
  • the mobile terminal M to be charged may be placed on the charging pad 620.
  • the charging pad 620 may be attached to the upper surface of the edge cover 610, and may be widely positioned on the front surface of the upper case 600.
  • the charging pad 620 may have various shapes such as a circle, an ellipse, and a rectangle.
  • the edge cover 610 may be coupled to the main frame 100 to support the charging pad 620 to be exposed to the front.
  • the edge cover 610 may be provided at both sides with a coupling hook 605 for coupling with the main frame 100.
  • the edge cover 610 may have a size smaller than the size of the heat sink 500 so as to be spaced apart from the outer surface of the heat sink 500. Therefore, as shown in FIG. 3, a heat dissipation space S for heat dissipation may be formed between the edge cover 600 and the heat sink 300.
  • the heat sink 500 may emit heat generated from the coil unit 300.
  • the heat sink 500 may be disposed between the main frame 100 and the upper case 600 to be adjacent to the coil unit 300.
  • the heat sink may be made of metal such as aluminum.
  • the heat sink 500 may be formed as a plate having a shape of a circle, an oval, a rectangle, or the like according to the shape of the wireless power transmitter 1.
  • the heat sink 500 may have a three-dimensional plate shape including a bottom portion 530, an inclined portion 520, and an exposed portion 510 according to a position.
  • the bottom part 530 may have a through hole 502 to be adjacent to the coil part 300 while being inserted, and may form a bottom surface of the heat sink 500.
  • the through hole 502 of the bottom portion 530 may be referred to as a coil insertion hole.
  • the through hole 502 has a shape (for example, elliptical) corresponding to the shape of the coil part 300, and the coil seating part 130 of the main frame 100 to increase the heat transfer efficiency with the coil part 300. May be greater than or equal to
  • the through holes 502 of the bottom part 530 may be configured with coupling holes 104, 204, and 504, and the bottom part 530 communicates with the through holes 103 and 106 of the main frame 100.
  • Hook through holes 505 through which the coupling hooks 605 of the through holes 503 and 506 and the upper case 600 are inserted may be formed.
  • the above-mentioned coupling holes 104, 204, and 504 may be referred to as bolt holes.
  • the inclined portion 520 extends the bottom portion 530 and the edge portion 510.
  • the inclined portion 520 may extend to be inclined upward with respect to the bottom portion 530, and the edge portion 510 may further extend outward from the inclined portion 520.
  • the edge portion 510 may be spaced apart from the upper case 600 described above and exposed to the outside with the heat dissipation space S interposed therebetween.
  • the edge 510 may be referred to as an exposed portion.
  • the vertical height H1 of the edge portion 510 may be greater than the vertical height H2 of the inclined portion 520, and the vertical height H3 of the bottom portion 530 may be the smallest. .
  • the heat dissipation plate 500 having the above-described configuration may increase the heat dissipation effect on the coil unit 500 by widening an air contact area between heat emitted from the coil unit 500 and the outside.
  • the adhesive tape 700 may attach the heat sink 500 to the main frame 100.
  • the adhesive tape 700 may contact at least one of the inclined portion 520 and the edge portion 510 of the heat sink 500.
  • the adhesive tape 700 may have a ring shape having a hollow hole, and one side may be cut to have an opening.
  • the adhesive tape 700 may not be included as necessary and may be modified to include various forms in which the heat sink 500 may be stably mounted on the main frame 100.
  • the wireless power transmitter 1 of the embodiment including the detailed configurations as described above includes a through-hole (air) of the lower case 400 when the coil unit 300 generates heat during wireless charging. External air may flow into the wireless power transmitter 1 through the inlet hole 410.
  • the introduced outside air passes through the through holes 103 and 106 of the main frame 100 and the through holes 503 and 506 of the heat sink 500 and is disposed between the heat sink 500 and the upper case 600. It has a flow to move to the outside through the space (S).
  • the heat dissipation plate 500 may be more effectively discharged to the outside using the above-described air flow.
  • the PCB substrate 200 positioned below the main frame 100 while being connected to the coil unit 300 and the connection terminal 250 is further spaced downward by the spacer protrusions 120 of the main frame 100. Because it is positioned so that it can operate stably while reducing the adverse effect of the heat release of the coil unit 300.
  • the wireless power transmitter 1 may emit heat to the outside through the heat sink 500.
  • the heat generated from the coil unit may be discharged through the through hole 410 of the lower case through the through hole 503, and the heat generated from the coil unit may be outside the coil unit (or the upper case) through the heat sink. Can be delivered.
  • Figure 8 shows the temperature distribution during charging for the wireless charger of the embodiment
  • Figure 9 shows the temperature distribution during charging for the wireless charger of the comparative example.
  • the wireless power transmitter 1 to which the heat sink 500 of the embodiment shown in FIG. 8 is applied has a lower surface temperature than the wireless charger of the comparative example in which the heat sink 500 of FIG. 9 is not applied. Can be observed.
  • the heat spreader 500 helps the heat dissipation of the coil unit 500 efficiently so that the blue range in which the temperature distribution on the front surface of the wireless power transmitter 1 is lowered is expanded. It can be confirmed visually.
  • FIG. 10 is a graph showing a charging time and a temperature change of the wireless charger of the embodiment
  • FIG. 11 is a graph showing a charging time and a temperature change of the wireless charger of the comparative example.
  • the charging time is reduced and the coil unit 300 is reduced compared to the wireless charger of the comparative example in which the heat sink 500 shown in FIG. 11 is not applied. It can be seen that the effect of the heat transfer of the decrease in the maximum temperature of the battery of the mobile terminal (M).
  • the coil unit is spaced apart from the PCB substrate through the main frame, and the heat dissipation area is increased by increasing the heat dissipation area through the heat sink, thereby rapidly improving the wireless charging speed. Without using it can provide a quiet, comfortable and stable charging environment.
  • the wireless power transmitter having improved heat generation performance of the present invention can be applied to a charger such as a mobile phone or a smart device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Un mode de réalisation de la présente invention concerne un appareil de transmission d'énergie sans fil comprenant : un cadre principal ayant une partie de logement de bobine et une rainure d'incision ; un boîtier supérieur disposé dans une partie supérieure du cadre principal ; un substrat de carte de circuit imprimé disposé dans une partie inférieure du cadre principal ; et une partie de bobine couplée électriquement au substrat de carte de circuit imprimé et logée dans la partie de logement de bobine à travers la rainure d'incision.
PCT/KR2019/006412 2018-05-30 2019-05-29 Appareil de transmission d'énergie sans fil ayant une performance exothermique améliorée Ceased WO2019231223A1 (fr)

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KR1020180061830A KR20190136303A (ko) 2018-05-30 2018-05-30 발열 성능이 개선된 무선 전력 송신 장치
KR10-2018-0061830 2018-05-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111106677A (zh) * 2020-01-20 2020-05-05 Oppo广东移动通信有限公司 无线充电设备及无线充电系统
CN113472084A (zh) * 2021-07-09 2021-10-01 上海华源磁业股份有限公司 一种无线发射线圈及无线充电器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160105014A (ko) * 2015-02-27 2016-09-06 삼성전자주식회사 무선전력 전송장치 및 무선 충전 방법
KR101690500B1 (ko) * 2015-07-20 2016-12-28 주식회사 아모센스 무선전력 송신모듈
US20170093198A1 (en) * 2015-09-30 2017-03-30 Apple Inc. Charging assembly for wireless power transfer
KR101733579B1 (ko) * 2016-04-28 2017-05-08 (주)우주일렉트로닉스 외부 자연 방열판을 구비하는 무선충전장치
KR101748835B1 (ko) * 2016-03-23 2017-06-21 안기훈 무선충전장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160105014A (ko) * 2015-02-27 2016-09-06 삼성전자주식회사 무선전력 전송장치 및 무선 충전 방법
KR101690500B1 (ko) * 2015-07-20 2016-12-28 주식회사 아모센스 무선전력 송신모듈
US20170093198A1 (en) * 2015-09-30 2017-03-30 Apple Inc. Charging assembly for wireless power transfer
KR101748835B1 (ko) * 2016-03-23 2017-06-21 안기훈 무선충전장치
KR101733579B1 (ko) * 2016-04-28 2017-05-08 (주)우주일렉트로닉스 외부 자연 방열판을 구비하는 무선충전장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111106677A (zh) * 2020-01-20 2020-05-05 Oppo广东移动通信有限公司 无线充电设备及无线充电系统
CN113472084A (zh) * 2021-07-09 2021-10-01 上海华源磁业股份有限公司 一种无线发射线圈及无线充电器

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