WO2012104954A1 - 非接触充電モジュール及び非接触充電機器 - Google Patents
非接触充電モジュール及び非接触充電機器 Download PDFInfo
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- WO2012104954A1 WO2012104954A1 PCT/JP2011/007346 JP2011007346W WO2012104954A1 WO 2012104954 A1 WO2012104954 A1 WO 2012104954A1 JP 2011007346 W JP2011007346 W JP 2011007346W WO 2012104954 A1 WO2012104954 A1 WO 2012104954A1
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- slit
- magnetic sheet
- charging module
- sheet
- coil
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- 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
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- 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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- 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
- H01F27/2823—Wires
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- 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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
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- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
Definitions
- the present invention relates to a non-contact charging module and a non-contact charging device having a planar coil portion around which a conductive wire is wound and a magnetic sheet.
- a power transmission coil is arranged on the charger side
- a power reception coil is arranged on the main device side
- electromagnetic induction is generated between the two coils to transmit power from the charger side to the main device side. It has also been proposed to apply a mobile terminal device or the like as the main device.
- the main device such as the portable terminal device and the charger are required to be thin and small.
- a planar coil portion as a power transmission coil or a power reception coil and a magnetic sheet as in (Patent Document 1).
- the winding start or winding end of the coil is located inside the coil. May end up.
- a portion where the coil is wound and a portion between the coil winding start or winding end and the terminal overlap in the thickness direction.
- the non-contact charging module cannot be thinned.
- some magnetic sheets are conductive, and in that case, it is important to insulate the conductive wire from the magnetic sheet.
- an object of the present invention is to achieve a reduction in thickness in a state in which insulation between a conductive wire and a magnetic sheet is ensured.
- the present invention is provided in a planar coil portion around which a conducting wire is wound, a magnetic sheet having the planar coil portion placed through an insulating sheet, and having conductivity, and the magnetic sheet.
- a concave portion or a slit extending from the winding start point of the planar coil portion to an end portion of the magnetic sheet, and the conductor of the planar coil portion pushes the insulating sheet into the concave portion or slit.
- the non-contact charging module is characterized in that it is housed in a slit and the conductive wire of the planar coil portion is insulated from the conductive magnetic sheet by the insulating sheet.
- the invention described in claim 1 is provided on the magnetic sheet, the planar coil portion around which the conductive wire is wound, the planar coil portion placed via an insulating sheet, and having conductivity.
- a concave portion or a slit extending from the winding start point of the planar coil portion to an end portion of the magnetic sheet, and the conductor of the planar coil portion pushes the insulating sheet into the concave portion or the slit to thereby form the concave portion or the slit.
- the conductive wire of the planar coil portion is housed in a non-contact charging module that is insulated from the conductive magnetic sheet by the insulating sheet, and in a state of ensuring insulation between the conductive wire and the magnetic sheet, Thinning can be achieved.
- the invention according to claim 2 is the non-contact charging module according to claim 1, wherein the width of the concave portion or the slit is at least three times the wire diameter of the conducting wire, and the conducting wire is surely expanded and contracted by the insulating sheet. Therefore, thinning can be achieved in a state where insulation between the conductor and the magnetic sheet is ensured.
- the invention according to claim 3 is the non-contact charging module according to claim 1, wherein a wire diameter of the conducting wire is smaller than 0.3 mm, and a thickness of the insulating sheet is 5 to 20 mm. Since the insulating sheet is accommodated in the recess due to the stretchability of the insulating sheet, it is possible to achieve a reduction in thickness while ensuring the insulation between the conductor and the magnetic sheet.
- the invention according to claim 4 is the non-contact charging module according to claim 1, wherein a through-hole smaller than the wire diameter of the conducting wire is formed in a portion of the insulating sheet facing the recess or slit. Even if the sheet does not have enough elasticity, the conductor is securely stored in the recess due to the elasticity of the insulating sheet, so that the insulation between the conductor and the magnetic sheet is ensured to achieve thinning. Can do.
- the invention according to claim 5 is the non-contact charging module according to claim 1, wherein the dimensional expansion / contraction ratio of the insulating sheet is 0.05% to 0.1%, wherein the hole or the like Even if not formed, the conductive wire is accommodated in the recess due to the stretchability of the insulating sheet. Therefore, it is possible to achieve a reduction in thickness while ensuring the insulation between the conductive wire and the magnetic sheet.
- the insulating sheet includes a cut at a position corresponding to the recess or the slit, and the conductive wire is arranged so that the insulating sheet intervenes between the conductive wire and the magnetic sheet.
- the conductive wire of the planar coil portion is housed in a recess or a slit, and is insulated from the conductive magnetic sheet by the insulating sheet. Even if it is used, it is possible to achieve a reduction in thickness while ensuring the insulation between the conductor and the magnetic sheet.
- the invention according to claim 7 is the non-contact charging module according to claim 6, wherein the wire diameter of the conductor of the planar coil portion is smaller than the thickness of the magnetic sheet, and the thickness of the magnetic sheet is 20 to 50 ⁇ m.
- the wire diameter of the conductor of the planar coil portion is smaller than the thickness of the magnetic sheet, and the thickness of the magnetic sheet is 20 to 50 ⁇ m.
- the invention according to claim 8 is the non-contact charging module according to claim 6, wherein the width of the concave portion or the slit is twice or more the wire diameter of the conducting wire, and the insulating sheet is surely magnetic with the conducting wire. Since it intervenes between the sheets, insulation between the conductive wire and the magnetic sheet can be ensured, and a reduction in thickness can be achieved.
- the invention according to claim 9 is the non-contact charging module according to claim 6, wherein the width of the concave portion or the slit is twice or more the thickness of the magnetic sheet, and the insulating sheet is reliably conductive and magnetic. Since it intervenes between the sheets, insulation between the conductive wire and the magnetic sheet can be ensured, and a reduction in thickness can be achieved.
- a tenth aspect of the present invention is a non-contact charging device including the non-contact charging module according to the first aspect, wherein the thinning is achieved in a state in which the insulation between the conducting wire and the magnetic sheet is ensured. Can do.
- Invention of Claim 11 is an electronic device provided with the non-contact charge module of Claim 1, Comprising: Thinning can be achieved in the state which ensured the insulation with a conducting wire and a magnetic sheet. .
- FIG. 1 is an assembly diagram of a contactless charging module according to an embodiment of the present invention
- FIG. 2 is a conceptual diagram of the contactless charging module according to an embodiment of the present invention
- (a) is a top view
- (b) is a cross-sectional view seen from the A direction in Fig. 2A
- Fig. 2C and Fig. 3D are cross-sectional views seen from the B direction in Fig. 2A
- 3A and 3B are conceptual diagrams of a magnetic sheet of the non-contact charging module according to the embodiment of the present invention, in which FIG. 3A is a top view
- FIG. 3B is a cross-sectional view viewed from the A direction in FIG.
- (d) is sectional drawing seen from the B direction of Fig.3 (a).
- the contactless charging module 1 of the present invention includes a planar coil portion 2 in which a conductive wire is wound in a spiral shape, and a magnetic sheet 3 provided so as to face the surface of the coil 21 of the planar coil portion 2.
- the planar coil section 2 includes a coil 21 in which a conductor is wound in a radial direction so as to draw a vortex on the surface, and terminals 22 and 23 provided at both ends of the coil 21.
- the coil 21 is obtained by winding a conductive wire in parallel on a plane, and a surface formed by the coil is called a coil surface.
- the thickness direction is a stacking direction of the planar coil portion 2 and the magnetic sheet 3.
- the coil 21 is wound outward from an inner diameter of 20 mm in diameter, and the outer diameter is 30 mm. That is, the coil 21 is wound in a donut shape.
- the coil 21 may be wound in a circular shape or may be wound in a polygonal shape. In the case of a polygon, the corner portion may be bent into a curved shape.
- the conducting wires are wound so as to leave a space between each other, the stray capacitance between the upper conducting wire and the lower conducting wire is reduced, and the AC resistance of the coil 21 can be kept small. Moreover, the thickness of the coil 21 can be suppressed by winding so that space may be packed.
- the cross-sectional area is a conducting wire having a circular shape, but a conducting wire having a rectangular shape or the like may be used.
- a gap is formed between adjacent conductors, so that the stray capacitance between the conductors is reduced, and the AC resistance of the coil 21 is reduced. Can do.
- the coil 21 is wound in one stage rather than being wound in two stages in the thickness direction, and the alternating current resistance of the coil 21 is lowered, and the transmission efficiency can be increased. This is because when a conducting wire is wound in two stages, stray capacitance is generated between the upper conducting wire and the lower conducting wire. Therefore, it is better to wind as many portions as possible in one stage, rather than winding the entire coil 21 in two stages. Moreover, it can reduce in thickness as the non-contact charge module 1 by winding in 1 step
- the inner diameter x inside the coil 21 shown in FIG. 1 is 10 mm to 20 mm, and the outer diameter is about 30 mm. As the inner diameter x is smaller, the number of turns of the coil 21 can be increased in the contactless charging module 1 of the same size, and the L value can be improved.
- the terminals 22 and 23 may be close to each other or may be disposed apart from each other, the contactless charging module 1 is easier to mount if they are disposed apart.
- the magnetic sheet 3 is provided in order to improve the power transmission efficiency of non-contact charging using electromagnetic induction action, and corresponds to the flat portion 31 and the inner diameter of the coil 21 at the center as shown in FIG.
- the center part 32 to perform and the recessed part 33 are provided.
- the center part 32 does not necessarily need to be convex.
- the recess 33 may be a slit 34, and the recess 33 or the slit 34 is not necessarily required.
- FIGS. 2 (c) and 2 (d) by providing the recess 33 or the slit 34, the conductive wire from the winding end of the coil 21 to the terminal 23 can be accommodated in the recess 33 or the slit 34. Therefore, it can be made thinner.
- the concave portion 33 or the slit 34 is formed so as to be substantially perpendicular to the end portion of the magnetic sheet 3 and overlap with the tangent line on the outer periphery of the central portion 32.
- the terminals 22 and 23 can be formed without bending the conducting wire.
- the length of the recess 33 or the slit 34 is about 15 mm to 20 mm.
- the length of the recess 33 or the slit 34 depends on the inner diameter of the coil 21.
- the concave portion 33 or the slit 34 may be formed in a portion where the end of the magnetic sheet 3 and the outer periphery of the central portion 32 are closest.
- the formation area of the recessed part 33 or the slit 34 can be suppressed to the minimum, and the transmission efficiency of the non-contact charging module 1 can be improved.
- the length of the recess 33 or the slit 34 is about 5 mm to 10 mm.
- the inner end of the recess 33 or the slit 34 is connected to the center 32.
- all the turns in the radial direction of the coil 21 are made into a one-stage structure, or one part is made into a one-stage structure and the other part is made into a two-stage structure. It is possible to do. Therefore, one of the terminals 22 and 23 can be pulled out from the outer periphery of the coil 21, but the other must be pulled out from the inside. Therefore, the portion around which the coil 21 is wound and the foot 24 (see FIG. 4) always overlap in the thickness direction. Accordingly, the concave portion 33 or the slit 34 may be provided in the overlapping portion, and the foot portion 24 may be accommodated therein.
- the foot portion 24 refers to a portion from the end of winding of the coil 21 to the terminal 22 or 23.
- the magnetic sheet 3 can be easily formed.
- it is the recessed part 33, as shown in FIG.4 (c), it is not limited to the recessed part 33 in which a cross-sectional shape becomes a square shape, You may form circular arc shape or roundness.
- a Ni—Zn ferrite sheet, a Mn—Zn ferrite sheet, a Mg—Zn ferrite sheet, or the like can be used as the magnetic sheet 3.
- the ferrite sheet can reduce the AC resistance of the coil 21 as compared with the amorphous metal magnetic sheet.
- the magnetic sheet 3 has at least a high saturation magnetic flux density material 3a and a high magnetic permeability material 3b laminated. Even when the high saturation magnetic flux density material 3a and the high magnetic permeability material 3b are not laminated, it is preferable to use the high saturation magnetic flux density material 3a having a saturation magnetic flux density of 350 mT or more and a thickness of at least 300 ⁇ m.
- the coil 21 has a one-stage structure as much as possible. In that case, all the turns in the radial direction of the coil should be a one-stage structure, or a part may be a one-stage structure and the other part a two-stage structure. Conceivable. Therefore, one of the terminals 22 and 23 can be pulled out from the outer periphery of the coil 21, but the other must be pulled out from the inside. Accordingly, the portion around which the coil 21 is wound and the foot portion 24 always overlap in the thickness direction.
- the concave portion 33 or the slit 34 is provided linearly in the overlapping portion.
- a linear recess 33 or slit that is parallel to the tangential line of the inner circumference of the coil 21 surface and extends at the shortest distance from the start or end of winding of the coil surface to the end of the magnetic sheet 3.
- the concave tangent 33 or the slit 34 extends from the vicinity of the outer periphery of the inner peripheral circle of the coil 21 surface, and the concave portion 33 or the slit 34 is the inner periphery of the coil 21 surface. It is the tangent of the circumference of the inner circumference circle at a location approaching the outer circumference of the circle.
- the terminals 22 and 23 can be formed without bending the conducting wire on the magnetic sheet 3. That is, in order to provide the concave portion 33 or the slit 34 and insert the conductive wire into the concave portion 33 or the slit 34, the conductive wire must be refracted in the thickness direction from the flat portion 31 toward the concave portion 33 or the slit 34. Therefore, since the conducting wire is not bent on the magnetic sheet 3 in the portion where the conducting wire is fitted from the flat portion 31 toward the recess 33 or the slit 34, it is possible to achieve a reduction in thickness while maintaining the strength of the conducting wire. In this case, the length of the straight portion 33b is about 15 mm to 20 mm.
- the coil 21 may be wound in a polygonal shape.
- the coil 21 is parallel to the shape of the space formed by the inner end of the surface of the coil 21 or the tangent line thereof, and is the point at which the coil surface starts or ends. It is preferable to provide the recess 33 or the slit 34 in a straight line extending at the shortest distance from to the end of the magnetic sheet 3.
- the magnetic sheet 3 has a recess 33 that is perpendicular to the tangent to the inner circumference of the coil 21 surface and extends at the shortest distance from the start or end of winding of the coil surface to the end of the magnetic sheet 3.
- the slit 34 may be formed. Thereby, the formation area of the recessed part 33 or a slit can be suppressed to the minimum, and the transmission efficiency of the non-contact charge module 1 can be improved. That is, by providing the concave portion 33 or the slit 34, a part of the magnetic sheet 3 is missing or thinned. Therefore, the magnetic flux leaks from the recess 33 or the slit 34, and the power transmission efficiency of the non-contact charging module may be somewhat reduced.
- the length of the straight portion 33b is about 5 mm to 10 mm.
- the shape is parallel to the end portion 3 a of the magnetic sheet 3 in order to provide the shortest distance to the end portion of the magnetic sheet 3.
- the coil 21 may be wound in a polygonal shape, and in that case, the coil 21 may be perpendicular to the shape of the space formed by the inner end of the surface of the coil 21 or its tangent line.
- the concave portion 33 or the slit 34 may be provided in a straight line extending from the end point to the end of the magnetic sheet 3 at the shortest distance.
- the coil 21 since the coil 21 is wound in a planar shape from the inside to the outside, the coil 21 becomes a recess 33 or a slit 34 that extends from the winding start point to the end of the magnetic sheet 3.
- the magnetic sheet 3 of the present embodiment is square.
- the shape of the magnetic sheet 3 is not limited to a square, and various shapes such as a circle and a polygon can be considered. Therefore, for example, the shape of the magnetic sheet 3 is polygonal, and the concave portion 33 or the slit 34 is perpendicular to the side against which one end of the concave portion 33 or the slit 34 abuts. The area of 33 or the slit 34 can be minimized.
- the shape of the magnetic sheet 3 is square, parallel to one pair of opposing end sides of the magnetic sheet 3 and perpendicular to the other pair of opposing end sides, In the rectangular magnetic sheet that is easy to use, the area of the recess 33 or the slit 34 can be minimized.
- the concave portion 33 or the slit 34 is provided in a portion where the coil 21 and the foot portion 24 overlap each other, and the surface of the coil 21 is provided on the flat portion 31.
- the concave portion 33 or the slit 34 may be provided to be somewhat longer or shorter, but it is preferable that at least 80% or more of the portion where the coil 21 and the foot portion 24 overlap can be covered.
- the magnetic sheet 3 is approximately 33 mm ⁇ 33 mm.
- the thickness d1 of the center part 32 shown in FIG.2 (c) is 0.2 mm.
- d2 shown in FIG. 3C is the thickness of the magnetic sheet 3, which is 0.6 mm, d3 is 0.15 mm, and d4 is 0.45 mm.
- the thicknesses of the high magnetic permeability materials 3b are set and laminated.
- the magnetic sheet 3 is conductive
- the insulation between the magnetic sheet 3 and the planar coil portion 2 will be described.
- the magnetic sheet 3 does not need to be conductive in all parts of the magnetic sheet 3.
- 3 a is a conductive sheet
- 3 b is non-conductive.
- the case where at least a part of the magnetic sheet 3 is conductive so as to be a conductive sheet is also included.
- FIG. 4A and 4B are diagrams of the magnetic sheet and the planar coil portion in which the concave portion is formed according to the embodiment of the present invention.
- FIG. 4A is a cross-sectional view of the concave portion of the magnetic sheet
- FIG. 4C is a cross-sectional view of the magnetic sheet and the insulating sheet after bonding
- FIG. 4D is a cross-sectional view of the foot of the insulating sheet and the coil.
- the side wall 33a and the bottom surface 33c of the recess 33 are also conductive. Therefore, the conducting wire and its foot 24 should not contact either the side wall 33a or the bottom surface 33c of the recess 33. Therefore, the insulating sheet 4 is bonded to at least the coil 21 side of the magnetic sheet 3. Then, the planar coil portion 2 is placed on the insulating sheet 4. At this time, the foot 24 is housed in the recess 33 by pushing down the insulating sheet 4 corresponding to the recess 33 downward. By doing so, the foot 24 can be brought into contact with the coil 21 and stored in the recess 33.
- the insulating sheet 4 insulates the planar coil part 2 and the magnetic sheet 3, at least the planar coil part 2 is provided on the part on which the magnetic sheet 3 is placed.
- the insulating sheet 4 may be configured to cover the entire surface of the magnetic sheet 3, thereby ensuring insulation.
- the insulating sheet 4 not only bonds the planar coil portion 2 and the magnetic sheet 3 but also insulates the planar coil portion 2 and the magnetic sheet 3 from each other. I have to intervene.
- base materials PET, PEN, acrylic, and polyester may be used for acrylic and silicone adhesives.
- the dimensional expansion / contraction rate is preferably 0.05% to 0.1%.
- the dimension expansion / contraction ratio is expressed by (length after treatment ⁇ length before treatment) / length before treatment, and treatment means that the insulating sheet 4 is stretched by the feet 24.
- the wire diameter of a conducting wire is about 0.3 mm.
- a small hole may be formed in order to remove air between the concave portion 33 and the insulating sheet 4 to increase the contractibility of the insulating sheet 4.
- the size of the hole is preferably 200 ⁇ m or more. Moreover, it is better to be closer to the center side end of the recess 33 or the slit 34, and it is preferable to make a hole in the range of the center side 1 ⁇ 2 of the slit length.
- the slit width Da1 is 1.34 mm
- the thickness Db1 of the magnetic sheet 3 is 0.6 mm
- the wire diameter Dc of the conducting wire is 0.25 mm
- the depth Dd1 of the recess 33 is 0.3 mm.
- the magnetic sheet 3 is provided with a recess 33 instead of the slit 34.
- the wire diameter Dc of the conducting wire is less than 75% of the thickness Db1 of the magnetic sheet 3.
- the wire diameter Dc of the conducting wire is preferably smaller than 50% of the thickness Db1 of the magnetic sheet 3.
- the width Da1 of a slit is 3 times or more of the wire diameter Dc1 of conducting wire. Since the width Da1 of the slit is three times or more the wire diameter Dc1 of the conducting wire, the insulating sheet 4 can sufficiently accommodate the foot portion 24 in the recess 33.
- the conducting wire is accommodated in the first slit 34 through the insulating sheet 4.
- Such a structure is particularly useful for the secondary side non-contact charging module on the receiving side. That is, in the secondary side non-contact charging module, since the voltage of the current flowing through the coil and the value of the current are relatively small, a thin conductive wire with a wire diameter of 0.25 mm is sufficient. On the other hand, since the housing of the secondary side non-contact charging module itself is desired to be downsized, the distance between the metal closest to the planar coil unit 2 and the planar coil unit 2 is smaller than that of the primary side non-contact charging module. And very close. Therefore, in order to sufficiently prevent the influence of metal, the magnetic sheet 3 becomes thicker than the primary side non-contact charging module.
- the concave portion 33 is often formed in the magnetic sheet 3.
- the insulating sheet 4 is provided with the slits 41, the insulating sheet 4 needs to be stretchable.
- the insulating sheet 4 is set to be as thin as 10 ⁇ m, and is preferably 5 to 20 ⁇ m or less.
- a flat coil portion in which a conducting wire is wound in a spiral shape a magnetic sheet provided so as to face the coil surface via an insulating sheet, and a magnetic sheet provided at the beginning or end of winding of the coil surface
- a recess or slit extending from the point to the end of the magnetic sheet, wherein the magnetic sheet is electrically conductive at least part of the portion where the recess or slit is formed, and the conductive wire passes the insulating sheet into the recess or slit. Since it is pushed in and accommodated in the recess or slit, it is possible to achieve a reduction in thickness while ensuring insulation between the conductor and the magnetic sheet.
- the width of the concave portion is three times or more the wire diameter of the conductive wire, the conductive wire is surely stored in the concave portion due to the stretchability of the insulating sheet, so that the insulation between the conductive wire and the magnetic sheet is ensured. Thinning can be achieved.
- the wire diameter is smaller than 0.3 mm and the thickness of the insulating sheet is 5 to 20 ⁇ m, the conductive wire is reliably accommodated in the recess due to the stretchability of the insulating sheet, so that the insulation between the conductive wire and the magnetic sheet is possible. It is possible to achieve a reduction in thickness while ensuring the above.
- the conductive wire can be surely expanded and contracted even when the insulating sheet lacks elasticity. Therefore, thinning can be achieved in a state where insulation between the conductor and the magnetic sheet is ensured.
- the slit 34 is provided in the case of the slit 34.
- the same method as the above-described concave portion 33 may be used, or the slit 34 can be insulated by the method described below. Further, although the method described below can be applied to the concave portion 33, the above method is preferable.
- FIG. 5 is an enlarged cross-sectional view of a magnetic sheet and a flat coil portion in which slits are formed in the embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a magnetic sheet having a slit and a planar coil portion in the embodiment of the present invention, and FIG. 6 (a) is a CC line when the concave portion of FIG. 3 (a) is a slit.
- FIG. 6B is a cross-sectional view taken along the line DD when the concave portion of FIG. 3A is a slit.
- the non-contact charging module 1 in the present embodiment includes a planar coil portion 2 in which a conducting wire is wound in a spiral shape, a magnetic sheet 3 provided so as to face the coil 21 surface via an insulating sheet 4, and a magnetic A first slit 34 provided on the sheet and extending from the beginning or end of winding of the coil surface to the end of the magnetic sheet 3, and the insulating sheet 4 corresponds to the first slit 34 (
- a second slit 41 (cut) is provided at a position facing (opposite), and the foot portion 24 of the conducting wire is accommodated in the first slit 34 via the insulating sheet 4.
- the insulating sheets 4 are provided on both surfaces of the magnetic sheet 3, respectively. Since the second slit 41 is a cut, the first slit 34 is thicker than the second slit 41.
- the magnetic sheet 3 is conductive, the magnetic sheet 3 and the conducting wire are electrically connected, and the non-contact charging module 1 does not function. Therefore, by providing the insulating sheet 4 between the planar coil portion 2 and the magnetic sheet 3, the planar coil portion 2 and the magnetic sheet 3 can be insulated. At this time, since the side wall 34a of the slit 34 is also conductive, if the conductive wire and the side wall 34a come into contact with each other, the non-contact charging module 1 will not function. Therefore, the insulating sheet 4 is provided with a second slit 41 at a position corresponding to (opposing to) the first slit 33. In FIG. 5, the adhesive sheet 5 is provided between the insulating sheet 4 and the conductor, and the adhesive sheet 5 can be bonded on both sides, so that the magnetic sheet 3 and the conductor can be fixed.
- the slit width Da2 is 1.34 mm
- the magnetic sheet 3 thickness Db2 is 0.46 mm
- the wire diameter Dc2 is 0.35 mm
- the slit width Da2 (1.34 mm) is magnetic. It becomes twice or more the thickness Db2 (0.46 mm) of the sheet 3 and the wire diameter Dc2 (0.35 mm) of the conducting wire. That is, the thickness of the side wall 34a is the thickness Db2 (0.46 mm) of the magnetic sheet 3, and the side wall 34a exists on both the left and right sides of the conductive wire, so that the portion pushed into the slit 34 of the insulating sheet 4 is required to be twice or more. Because it becomes.
- the conducting wire is accommodated in the first slit 34 through the insulating sheet 4.
- Such a structure is particularly useful for the primary side non-contact charging module on the transmitting side. That is, in the primary side non-contact charging module, since the voltage of the current flowing through the coil and the value of the current are large, the conducting wire becomes thick with a wire diameter of 0.35 mm. On the other hand, since the housing of the primary side non-contact charging module is large, the distance between the metal closest to the planar coil unit 2 and the planar coil unit 2 is larger than that of the secondary side non-contact charging module. Therefore, the magnetic sheet 3 becomes thinner compared to the secondary side non-contact charging module.
- the wire diameter of the conducting wire is larger than that of the secondary-side non-contact charging module, and the thickness of the magnetic sheet 3 is thin, so that the slit 34 is often formed in the magnetic sheet 3.
- the bottom surface of the magnetic sheet 3 does not exist below the conductor even when the conductor is pushed into the slit 34 as compared with the case where the recess is formed (in this embodiment, the insulation in which the slit 41 is formed).
- An insulating sheet 4 different from the sheet 4 is adhered).
- the insulating sheet 4 is provided with the slit 41 and does not need to be stretchable, in this embodiment, the insulating sheet 4 is set to be as thick as 30 ⁇ m, and preferably 20 ⁇ m to 50 ⁇ m so that the strength does not decrease even if the slit is formed. Further, the insulating sheet 4 is preferably made of an acrylic or silicone adhesive with a base material PET, PEN, acrylic or polyester. The wire diameter of the conducting wire is smaller than the thickness of the magnetic sheet.
- the planar coil portion in which the conductive wire is wound in a spiral shape the magnetic sheet provided so as to face the coil surface via the insulating sheet, the magnetic sheet, the winding start of the coil surface or A first slit extending from the end of winding to the end of the magnetic sheet, and at least part of the portion of the magnetic sheet in which the first slit is formed is conductive, and the insulating sheet includes a first slit.
- the second slit is provided at a position corresponding to the slit, and the conductive wire is accommodated in the first slit via the insulating sheet, so that the insulation between the conductive wire and the magnetic sheet is ensured and the thickness is reduced. Can be achieved.
- the insulating sheet reliably intervenes between the conducting wire and the magnetic sheet, so that the insulation between the conducting wire and the magnetic sheet is ensured and the thickness is reduced. Can be achieved.
- the insulating sheet reliably intervenes between the conductor and the magnetic sheet, so that the insulation between the conductor and the magnetic sheet is ensured and the thickness is reduced. Can be achieved.
- the insulating sheet reliably intervenes between the conductor and the magnetic sheet, so Insulation can be ensured and thinning can be achieved.
- the coil 21 is not limited to being annularly wound, and may be wound in a square shape or a polygonal shape.
- the inner side has a three-stage structure
- the outer side has a two-stage structure
- the inner side is wound in multiple stages
- the outer side is wound with a number of stages smaller than the number of stages wound on the inner side. An effect can be obtained.
- the non-contact power transmission device includes a charger including a power transmission coil and a magnetic sheet, and a main device including a power receiving coil and a magnetic sheet.
- the main device is an electronic device such as a mobile phone.
- the circuit on the charger side includes a rectifying / smoothing circuit unit, a voltage conversion circuit unit, an oscillation circuit unit, a display circuit unit, a control circuit unit, and the power transmission coil.
- the circuit on the main device side includes the power receiving coil, a rectifier circuit unit, a control circuit unit, and a load L mainly composed of a secondary battery.
- the power transmission from the charger to the main device is performed using an electromagnetic induction action between the power transmission coil of the charger on the primary side and the power receiving coil of the main device on the secondary side.
- the non-contact charging device of the present embodiment includes the non-contact charging module described above, the non-contact charging device is provided in a state in which the cross-sectional area of the planar coil portion is sufficiently secured to improve power transmission efficiency. It can be reduced in size and thickness.
- the non-contact charging module of the present invention since the non-contact charging module can be thinned in a state in which the cross-sectional area of the planar coil portion is sufficiently secured, a portable terminal such as a mobile phone or a portable computer, It is useful as a non-contact charging module for various electronic devices such as portable devices such as video cameras.
- Non-contact charge module Planar coil part 21 Coil 22,23 Terminal 24 Foot
Abstract
Description
以下、本発明の実施の形態について図面を用いて説明する。図1は、本発明の実施の形態における非接触充電モジュールの組立図、図2は、本発明の実施の形態における非接触充電モジュールの概念図であって(a)は上面図、(b)は図2(a)のA方向から見た断面図、(c)及び(d)は図2(a)のB方向から見た断面図である。図3は、本発明の実施の形態における非接触充電モジュールの磁性シートの概念図であり、(a)は上面図、(b)は図3(a)のA方向から見た断面図、(c)及び(d)は図3(a)のB方向から見た断面図である。
2 平面コイル部
21 コイル
22、23 端子
24 足部
3 磁性シート
31 平坦部
32 中心部
33 凹部
34 スリット(第1のスリット)
Claims (11)
- 導線が巻回された平面コイル部と、
前記平面コイル部を絶縁シートを介して載置し、導電性を有する磁性シートと、
前記磁性シートに設けられ、前記平面コイル部の巻始めの点から前記磁性シートの端部にまで伸びる凹部またはスリットと、を備え、
前記平面コイル部の導線は、前記絶縁シートを前記凹部またはスリット内に押し込んで前記凹部またはスリット内に収納され、
前記平面コイル部の導線は、前記絶縁シートにより前記導電性を有する磁性シートから絶縁される非接触充電モジュール。 - 前記凹部またはスリットの幅が、前記導線の線径の3倍以上である請求項1に記載の非接触充電モジュール。
- 前記導線の線径が0.3mmより小さく、前記絶縁シートの厚みが5~20mmである請求項1に記載の非接触充電モジュール。
- 前記絶縁シートの前記凹部またはスリットに対向する部分に、前記導線の線径よりも小さい貫通孔を開ける請求項1に記載の非接触充電モジュール。
- 前記絶縁シートの寸法伸縮率が、0.05%~0.1%である請求項1に記載の非接触充電モジュール。
- 前記絶縁シートは、前記凹部またはスリットに対応する位置に切れ目を備え、
前記導線は、前記絶縁シートが前記導線と前記磁性シートとの間に介入するように前記凹部またはスリット内に収納され、
前記平面コイル部の導線は、前記絶縁シートにより前記導電性を有する磁性シートから絶縁される請求項1に記載の非接触充電モジュール。 - 前記平面コイル部の導線の線径が磁性シートの厚みよりも小さく、前記磁性シートの厚みが20~50μmである請求項6に記載の非接触充電モジュール。
- 前記凹部またはスリットの幅が、前記導線の線径の2倍以上である請求項6に記載の非接触充電モジュール。
- 前記凹部またはスリットの幅が、前記磁性シートの厚みの2倍以上である請求項6に記載の非接触充電モジュール。
- 請求項1に記載の非接触充電モジュールを備えた非接触充電機器。
- 請求項1に記載の非接触充電モジュールを備えた電子機器。
Priority Applications (4)
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KR1020137016871A KR101326716B1 (ko) | 2011-02-01 | 2011-12-28 | 비접촉 충전 모듈 및 비접촉 충전 기기 |
EP20110857869 EP2631922B1 (en) | 2011-02-01 | 2011-12-28 | Non-contact charging module and non-contact charger |
CN201190000973.5U CN203415393U (zh) | 2011-02-01 | 2011-12-28 | 非接触充电模块、非接触充电设备以及受电侧电子设备 |
US13/990,901 US8729855B2 (en) | 2011-02-01 | 2011-12-28 | Non-contact charging module and non-contact charger |
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JP2011-019482 | 2011-02-01 | ||
JP2011019482A JP4835797B1 (ja) | 2011-02-01 | 2011-02-01 | 非接触充電モジュール及び非接触充電機器 |
JP2011019481A JP5031911B2 (ja) | 2011-02-01 | 2011-02-01 | 非接触充電モジュール及び非接触充電機器 |
JP2011-019481 | 2011-02-01 |
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WO2012104954A1 true WO2012104954A1 (ja) | 2012-08-09 |
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US (1) | US8729855B2 (ja) |
EP (1) | EP2631922B1 (ja) |
KR (1) | KR101326716B1 (ja) |
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WO (1) | WO2012104954A1 (ja) |
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KR101339486B1 (ko) * | 2012-03-29 | 2013-12-10 | 삼성전기주식회사 | 박막 코일 및 이를 구비하는 전자 기기 |
KR102017669B1 (ko) * | 2013-08-29 | 2019-10-21 | 주식회사 위츠 | 무선 전력 전송용 코일형 유닛, 무선 전력 전송장치, 전자기기 및 무선전력 전송용 코일형 유닛의 제조방법 |
KR101762778B1 (ko) | 2014-03-04 | 2017-07-28 | 엘지이노텍 주식회사 | 무선 충전 및 통신 기판 그리고 무선 충전 및 통신 장치 |
US10554078B2 (en) * | 2015-04-24 | 2020-02-04 | Intel Corporation | Method and apparatus for coil integration for uniform wireless charging |
CN110033931B (zh) * | 2018-01-12 | 2021-10-29 | 乾坤科技股份有限公司 | 电子装置及其制作方法 |
EP3786988A4 (en) * | 2018-06-11 | 2021-09-01 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | WIRELESS CHARGING COIL, WIRELESS CHARGING KIT AND ELECTRONIC DEVICE |
CN110518716B (zh) * | 2019-08-30 | 2023-11-03 | 中兴新能源汽车有限责任公司 | 一种无线充电装置及其无线充电器 |
CN113871155B (zh) * | 2021-09-18 | 2023-07-21 | 横店集团东磁股份有限公司 | 一种发射端磁芯及其制备方法 |
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US8729855B2 (en) | 2014-05-20 |
CN203415393U (zh) | 2014-01-29 |
EP2631922A1 (en) | 2013-08-28 |
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KR20130094845A (ko) | 2013-08-26 |
EP2631922B1 (en) | 2015-05-06 |
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