CN111180175A - Wireless charging transmitting coil and wireless charging structure - Google Patents
Wireless charging transmitting coil and wireless charging structure Download PDFInfo
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- CN111180175A CN111180175A CN201811340562.5A CN201811340562A CN111180175A CN 111180175 A CN111180175 A CN 111180175A CN 201811340562 A CN201811340562 A CN 201811340562A CN 111180175 A CN111180175 A CN 111180175A
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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
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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
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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
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- Computer Networks & Wireless Communication (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a wireless charging transmitting coil and a wireless charging structure, wherein the wireless charging transmitting coil at least comprises: at least three-layer coil cloth gang layer of arranging with stacking mode from top to bottom, wherein, first coil cloth gang layer in at least three-layer coil cloth gang layer includes: at least three first coils arranged on the same plane, wherein adjacent first coils are tangent to each other; the second coil cloth laying layer includes: at least one second coil disposed between the first coil arranging layer and the third coil arranging layer; the third coil cloth disposal layer includes: at least three third coils arranged on the same plane, and the adjacent third coils are tangent to each other; the centers of the three first coils which are tangent to each other and the centers of the three third coils which are tangent to each other respectively form an equilateral triangle, the centers of the two equilateral triangles are overlapped in the stacking direction and are overlapped with the center of a second coil in the stacking direction, and therefore the charging blind area of the wireless charging transmitting coil is reduced.
Description
Technical Field
The invention relates to the field of wireless charging, in particular to a wireless charging transmitting coil and a wireless charging structure.
Background
Wireless charging technology (Wireless charging technology) is derived from Wireless power transmission technology, and Wireless transmission of power is realized through electromagnetic induction. For the wireless charging technology, the coil positions of the transmitting terminal and the receiving terminal have great influence on the coupling performance of the coils, i.e. the misalignment of the coil of the transmitting terminal and the coil of the receiving terminal greatly influences the charging efficiency.
With the rapid development of the wireless charging market, higher demands are put on wireless charging equipment. And current wireless charger adopts the monocoil as the transmitting terminal mostly, and receiving terminal coil must be placed in transmitting terminal coil central point and put just can charge when this kind of structure charges for the charging area is limited, and transmitting terminal coil low-usage, thereby leads to the convenience of charging not enough far away.
Therefore, it is necessary to design a new wireless charging transmitting coil and a new wireless charging structure to solve the above technical problems.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a wireless charging transmitting coil and a wireless charging structure, which solve the problems of limited charging area and low coil utilization rate of the existing single-coil wireless charger.
To achieve the above and other related objects, the present invention provides a wireless charging transmitting coil, comprising: at least three coil arrangement layers arranged in an up-down stacking manner, wherein,
the first coil lay out layer in the at least three coil lay out layers includes: at least three first coils arranged on the same plane, wherein the adjacent first coils are tangent to each other;
the second coil cloth laying layer includes: at least one second coil disposed between the first coil arranging layer and the third coil arranging layer;
the third coil cloth disposal layer includes: at least three third coils arranged on the same plane, wherein the adjacent third coils are tangent to each other;
the centers of the three first coils which are tangent to each other and the centers of the three third coils which are tangent to each other respectively form an equilateral triangle, the centers of the two equilateral triangles are overlapped in the stacking direction and are overlapped with the center of the second coil in the stacking direction, and therefore the charging blind area of the wireless charging transmitting coil is reduced.
Optionally, any one of the three coil arranging layers further includes: the fourth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; any one of the other two coil arranging layers further comprises: the fifth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; and the fifth coil is arranged in a charging blind area generated after the other two layers of coils are arranged and laminated.
Optionally, the first coil cloth layer further comprises: the fourth coil is arranged on the outer side of the first coil, and adjacent coils are tangent to each other; the second coil cloth laying layer still includes: the fifth coil is arranged on the outer side of the second coil, and adjacent coils are tangent to each other; the third coil floorcloth layer further includes: at least one sixth coil arranged on the same plane with the third coil, wherein the sixth coil is arranged on the outer side of the third coil, and adjacent coils are tangent to each other; the sixth coil is arranged in a charging blind area generated after the first coil arrangement layer and the second coil arrangement layer are stacked.
Optionally, the first coil cloth layer comprises: the three first coils and the three fourth coils are arranged on the same plane and in four rows, wherein the first row comprises two first coils, the second row comprises one first coil, the third row comprises two fourth coils, the fourth row comprises one fourth coil, and adjacent coils are tangent to each other;
the second coil cloth laying layer includes: the second coil and the three fifth coils are arranged on the same plane in three rows, wherein the first row comprises one second coil, the second row comprises two fifth coils, the third row comprises one fifth coil, and adjacent coils are tangent to each other;
the third coil arranging layer includes: the three third coils and the three sixth coils are arranged on the same plane and in four rows, wherein the first row comprises one third coil, the second row comprises two third coils, the third row comprises one sixth coil, the fourth row comprises two sixth coils, and adjacent coils are tangent to each other.
Optionally, the ratio of the overlapping area of any coil in the wireless charging and transmitting coil to the total area of the coils is 0.47-0.71.
Optionally, any coil fabric arrangement layer further includes: the coil comprises a substrate and substrate positioning holes, wherein the substrate positioning holes are formed in the edges of two sides of the substrate and penetrate through the upper surface and the lower surface of the substrate, and the coil is formed in the substrate and has a preset distance with the substrate positioning holes.
Optionally, the thickness of any coil arrangement layer is 0.31mm to 0.41mm, and the total thickness of the wireless charging transmitting coil is 1mm to 1.16 mm.
The invention also provides a wireless charging structure, which comprises:
a base;
a magnetic shielding layer mounted on the upper surface of the base;
the wireless charging transmitting coil is arranged on the upper surface of the magnetic shielding layer;
the PCBA board is arranged on the lower surface of the base;
and the wire ends of the coils in the wireless charging transmitting coil are electrically connected with the bonding pads on the PCBA board.
Optionally, the base comprises a base body, positioning columns and mounting columns, the positioning columns are arranged at edges of two sides of the upper surface of the base body, and the mounting columns are arranged on the lower surface of the base body;
the magnetic shielding layer is provided with a magnetic shielding positioning hole penetrating through the upper surface and the lower surface of the magnetic shielding layer, and the magnetic shielding layer is installed on the upper surface of the base body in an adaptive mode through the magnetic shielding positioning hole and the positioning column;
any coil arrangement layer in the wireless charging transmitting coil comprises a substrate, substrate positioning holes and coils, wherein the substrate positioning holes are formed in the edges of the two sides of the substrate and penetrate through the upper surface and the lower surface of the substrate, the coils are formed in the substrate and have preset intervals with the substrate positioning holes, and the wireless charging transmitting coil is mounted on the upper surface of the magnetic shielding layer in an adaptive mode through the substrate positioning holes and the positioning columns;
the PCBA board is provided with mounting holes penetrating through the upper surface and the lower surface of the PCBA board, and the PCBA board is mounted on the lower surface of the base body through the mounting holes and the mounting columns in an adaptive mode.
Optionally, a connector electrically connected to the pad is disposed on the PCBA board, and a wire end of each coil in the wireless charging transmitting coil is electrically connected to the pad through the connector.
As described above, the wireless charging transmitting coil and the wireless charging structure of the present invention have the following advantages: according to the invention, through the position design of each coil in the first coil arrangement layer, the second coil arrangement layer and the third coil arrangement layer, the charging blind area is minimized, the charging area is maximized, the problems of charging efficiency reduction and charging incapability caused by dislocation of the transmitting end coil and the receiving end coil during wireless charging are avoided, the charging efficiency is improved, and the position freedom degree of the wireless charging equipment is also improved. The wireless charging structure can be suitable for different portable electronic devices and has the advantages of strong universality, high charging efficiency and the like.
Drawings
Fig. 1 is a schematic diagram of a wireless charging transmitting coil according to an embodiment.
Fig. 2 is a schematic diagram showing a coil arrangement of each coil arrangement layer in the wireless charging transmitting coil shown in fig. 1.
Fig. 3 is a schematic diagram of another wireless charging transmitting coil according to the first embodiment.
Fig. 4 is a schematic diagram showing a coil arrangement of each coil arrangement layer in the wireless charging transmitting coil shown in fig. 3.
Fig. 5 is a schematic diagram of another wireless charging transmitting coil according to the first embodiment.
Fig. 6 is a schematic diagram showing a coil arrangement of each coil arrangement layer in the wireless charging transmitting coil shown in fig. 5.
Fig. 7 is a schematic structural diagram of the wireless charging transmitting coil according to the first embodiment.
Fig. 8 is a schematic diagram of the wireless charging structure according to the second embodiment.
Fig. 9 is a circuit block diagram of a circuit structure on the PCBA board according to the second embodiment.
Description of the element reference numerals
1 Wireless charging structure
10 wireless charging transmitting coil
100 first coil cloth layer
101 first coil
102 fourth coil
103 substrate
104 substrate positioning hole
200 second coil arrangement layer
201 second coil
202 fifth coil
203 substrate
204 substrate positioning hole
300 third coil arrangement layer
301 third coil
302 sixth coil
303 base plate
304 substrate positioning hole
20 base
21 base body
22 positioning column
30 magnetic shield layer
31 magnetic shield positioning hole
40 PCBA board
41 mounting hole
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 9. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example one
As shown in fig. 1 and fig. 2, the present embodiment provides a wireless charging transmitting coil, where the wireless charging transmitting coil 10 at least includes: at least three coil arrangement layers arranged in an up-down stacking manner, wherein,
a first coil lay-out layer 100 of the at least three coil lay-out layers includes: at least three first coils 101 arranged on the same plane, and the adjacent first coils 101 are tangent to each other;
the second coil layout layer 200 includes: at least one second coil 201 disposed between the first coil arranging layer 100 and the third coil arranging layer 300;
the third coil arranging layer 300 includes: at least three third coils 301 arranged on the same plane, and the adjacent third coils 301 are tangent to each other;
the centers of the three mutually tangent first coils 101 and the centers of the three mutually tangent third coils 301 respectively form an equilateral triangle, the centers of the two equilateral triangles coincide in the stacking direction and coincide with the center of the second coil 201 in the stacking direction, so that the charging blind area of the wireless charging transmitting coil is reduced, the minimization of the charging blind area is realized, and the charging area is maximized.
Note that, in the present embodiment, the coils in each coil arrangement layer are circular coils, and the diameters of the circular coils are the same. In order to reduce the dead zone of the wireless charging transmitting coil, in this embodiment, three first coils 101 tangent to each other in the first coil arrangement layer 100 are disposed opposite to three third coils 301 tangent to each other in the third coil arrangement layer 300 (for example, the three first coils 101 are arranged in two rows, wherein the first row includes two first coils, the second row includes one first coil, and the three third coils are arranged in two rows, wherein the first row includes one third coil, and the second row includes two third coils).
As an example, any one of the three coil arranging layers further includes: the fourth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; any one of the other two coil arranging layers further comprises: the fifth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; and the fifth coil is arranged in a charging blind area generated after the other two layers of coils are arranged and laminated. Specifically, the fourth coil is disposed in the first coil arrangement layer 100, and the fifth coil is disposed in the second coil arrangement layer 200; or the fourth coil is disposed in the first coil arranging layer 100, and the fifth coil is disposed in the third coil arranging layer 300; or the fourth coil is disposed in the second coil arranging layer 200, and the fifth coil is disposed in the third coil arranging layer 300; the fourth coils may be arranged in the row direction, the column direction, or both the row direction and the column direction; the fifth coils may be arranged in the row direction, the column direction, or both the row direction and the column direction. Alternatively, as shown in fig. 3 and 4, the fourth coil 102 is disposed in the first coil arrangement layer 100 and arranged along the row direction; the fifth coil 202 is disposed in the second coil arrangement layer 200 and arranged along the row direction.
As another example, the first coil arrangement layer 100 further includes: at least one fourth coil 102 disposed on the same plane as the first coil 101, wherein the fourth coil 102 is disposed outside the first coil 101, and adjacent coils are tangent to each other; the second coil layering layer 200 further includes: at least one fifth coil 202 arranged on the same plane with the second coil 201, wherein the fifth coil 202 is arranged on the outer side of the second coil 201, and adjacent coils are tangent to each other; the third coil arranging layer 300 further includes: at least one sixth coil 302 arranged on the same plane as the third coil 301, wherein the sixth coil 302 is arranged on the outer side of the third coil 301, and adjacent coils are tangent to each other; the sixth coil 302 is disposed in a charging blind area generated after the first coil laying layer 100 and the second coil laying layer 200 are stacked. Specifically, the fourth coils 102 may be arranged along a row direction, a column direction, or both the row direction and the column direction; the fifth coils 202 may be arranged in a row direction, a column direction, or both the row direction and the column direction; the sixth coils 302 may be arranged in a row direction, a column direction, or both the row direction and the column direction.
Optionally, in this embodiment, as shown in fig. 5 and 6, the first coil cloth layer 100 includes: three first coils 101 and three fourth coils 102 which are arranged on the same plane and in four rows, wherein the first row comprises two first coils 101, the second row comprises one first coil 101, the third row comprises two fourth coils 102, the fourth row comprises one fourth coil 102, and adjacent coils are tangent to each other;
the second coil layering 200 includes: a second coil 201 and three fifth coils 202 disposed on the same plane and arranged in three rows, wherein the first row includes one second coil 201, the second row includes two fifth coils 202, the third row includes one fifth coil 202, and adjacent coils are tangent to each other;
the third coil arranging layer 300 includes: three third coils 301 and three sixth coils 302 arranged in four rows and disposed on the same plane, wherein the first row includes one third coil 301, the second row includes two third coils 301, the third row includes one sixth coil 302, the fourth row includes two sixth coils 302, and adjacent coils are tangent to each other.
By way of example, the ratio of the overlapping area of any coil in the wireless charging transmitting coil to the total area of the coils is 0.47-0.71, so that the charging efficiency is prevented from being reduced due to the fact that the overlapping area is too large, and meanwhile, the charging blind area is prevented from being easily generated due to the fact that the overlapping area is too small.
As an example, as shown in fig. 7, each coil lay-out layer further includes: the circuit board positioning structure comprises a substrate 103/203/303 and substrate positioning holes 104/204/304, wherein the substrate positioning holes are formed in two side edges of the substrate and penetrate through the upper surface and the lower surface of the substrate, and the coil is formed in the substrate and has a preset distance with the substrate positioning holes; the embodiment utilizes the substrate to position the coils so as to arrange the coils on the same layer or different layers, and is matched with the substrate positioning holes so as to assemble the coil arrangement layers in multiple layers to manufacture the wireless charging structure. Specifically, any one of the coil arrangement layers is manufactured through an FPC process. It should be noted that the preset distance is set as long as the coil is not in contact with the substrate positioning hole, and the specific value of the preset distance is not limited in this embodiment.
Specifically, the thickness of any coil arrangement layer is 0.31 mm-0.41 mm, and the total thickness of the wireless charging transmitting coil is 1 mm-1.16 mm.
Example two
As shown in fig. 8, the present embodiment provides a wireless charging structure, where the wireless charging structure 1 includes:
a base 20;
a magnetic shielding layer 30 mounted on the upper surface of the base 20 for electromagnetically shielding the wireless charging transmitting coil and the PCBA board;
the wireless charging transmitting coil 10 according to the first embodiment, which is installed on the upper surface of the magnetic shielding layer 30, is used in cooperation with a receiving coil in a device to be charged, so as to wirelessly charge the device to be charged;
the PCBA board 40 is mounted on the lower surface of the base 20 and used for selecting a corresponding coil from the wireless charging transmitting coils as a working coil according to the position of the device to be charged, so that the device to be charged is wirelessly charged through the working coil, and meanwhile, the wireless charging process is controlled;
wherein, the wire ends (not shown) of each coil in the wireless charging and transmitting coil 10 are electrically connected with the pads (not shown) on the PCBA board 40.
As an example, as shown in fig. 8, the base includes a base body 21, positioning pillars 22 and mounting pillars (not shown in the figure), the positioning pillars 22 are disposed at two side edges of the upper surface of the base body 21, and the mounting pillars are disposed at the lower surface of the base body 21;
the magnetic shielding layer 30 is provided with a magnetic shielding positioning hole 31 penetrating through the upper surface and the lower surface of the magnetic shielding layer, and the magnetic shielding layer 30 is fittingly installed on the upper surface of the base body 21 through the magnetic shielding positioning hole 31 and the positioning column 22;
any one coil arrangement layer in the wireless charging transmitting coil 10 comprises a substrate 103/203/303, substrate positioning holes 104/204/304 and coils, wherein the substrate positioning holes are formed in the edges of two sides of the substrate and penetrate through the upper surface and the lower surface of the substrate, the coils are formed in the substrate and have a preset distance with the substrate positioning holes, and the wireless charging transmitting coil is fittingly installed on the upper surface of the magnetic shielding layer through the substrate positioning holes and positioning columns;
the PCBA board 40 is provided with a mounting hole 41 penetrating through the upper surface and the lower surface of the PCBA board 40, and the PCBA board 40 is mounted on the lower surface of the base body 21 through the mounting hole 41 and the mounting column in an adaptive mode.
As an example, the base 20, the magnetic shielding layer 30, the first coil arrangement layer 100, the second coil arrangement layer 200, and the third coil arrangement layer 300 in the wireless charging transmitting coil 10 are all fixed by a glue layer, wherein the glue layer is a double-sided glue layer; as before, a double-sided adhesive layer is attached to the upper surface of the base body 21, and then the magnetic shield layer 30 is mounted on the upper surface of the base body 21 through the positioning posts 22 and the magnetic shield positioning holes 31. The base 20 and the PCBA board 40 are fixed through screws, wherein threads matched with the screws are arranged on the mounting columns. Optionally, the positioning column and the mounting column may be of the same structure, that is, the mounting column penetrates through the base body and extends upward and downward at the same time.
For example, a connector (not shown) electrically connected to the pad is provided on the PCBA board 40, and the wire ends of the coils in the wireless charging transmitting coil 10 are electrically connected to the pad through the connector.
As an example, as shown in fig. 9, the circuit structure on the PCBA board 40 includes:
the direct current power supply input circuit is connected with an external power supply and used for outputting direct current to the wireless charging structure so as to supply power to the wireless charging structure;
the wireless charging control circuit is connected with the direct-current power supply input circuit and used for controlling the direct-current power supply input circuit to supply power to a working coil in the wireless charging transmitting coil according to charging information fed back by the demodulation circuit and working coil information fed back by the coil selector; the charging operation of the wireless charging structure is turned off according to an overcurrent protection signal, an overvoltage protection signal or an overtemperature protection signal fed back by the current monitoring circuit, the voltage monitoring circuit or the temperature monitoring circuit, so that overcurrent, overvoltage or overtemperature protection is realized;
the coil selector is connected between the wireless charging control circuit and the wireless charging transmitting coil and used for detecting the position of equipment to be charged, selecting a corresponding coil from the wireless charging transmitting coil as a working coil according to the position information of the equipment to be charged and feeding back the information of the working coil to the wireless charging control circuit;
the resonant circuit is connected between the wireless charging control circuit and the wireless charging transmitting coil and used for converting direct current into alternating current so as to enable the wireless charging transmitting coil to generate an alternating magnetic field, and magnetic field coupling is carried out through the alternating magnetic field to excite a receiving end coil in the equipment to be charged, so that wireless charging of the equipment to be charged is realized;
the demodulation circuit is connected between the wireless charging control circuit and the wireless charging transmitting coil and is used for communicating with the equipment to be charged so as to acquire charging information of the equipment to be charged and feed back the charging information to the wireless charging control circuit;
the current monitoring circuit is connected between the wireless charging control circuit and the wireless charging transmitting coil and used for monitoring the working current of a working coil in the wireless charging transmitting coil, judging that the current is in an abnormal state when the working current is greater than a preset current, and feeding back an overcurrent protection signal to the wireless charging control circuit;
the voltage monitoring circuit is connected between the wireless charging control circuit and the wireless charging transmitting coil and is used for monitoring the working voltage of a working coil in the wireless charging transmitting coil in real time, judging that the working voltage is in an abnormal voltage state at the moment when the working voltage is greater than a preset voltage and feeding an overvoltage protection signal back to the wireless charging control circuit; and
the temperature monitoring circuit is connected between the wireless charging control circuit and the wireless charging transmitting coil and used for monitoring the temperature of the working coil in the wireless charging transmitting coil in real time, judging that the working coil is in an abnormal temperature state at the moment when the monitoring temperature is higher than a preset temperature, and feeding back an over-temperature protection signal to the wireless charging control circuit.
Specifically, as shown in fig. 9, the circuit structure on the PCBA board 40 further includes: and the LED control circuit is connected with the wireless charging control circuit and used for controlling the on and off of the LED lamp according to the working state of the wireless charging structure so as to display the working state of the wireless charging structure.
Specifically, as shown in fig. 9, the circuit structure on the PCBA board 40 further includes: and the voltage protection circuit is connected between the direct-current power supply input circuit and the wireless charging transmitting coil and is used for performing voltage protection on the wireless charging transmitting coil.
Specifically, as shown in fig. 9, the circuit structure on the PCBA board 40 further includes: and the I2C communication interface circuit is connected with the wireless charging control circuit and is used for being connected with external equipment so as to consult the working state and the working parameters of the wireless charging structure.
In summary, the wireless charging transmitting coil and the wireless charging structure of the invention have the following beneficial effects: according to the invention, through the position design of each coil in the first coil arrangement layer, the second coil arrangement layer and the third coil arrangement layer, the charging blind area is minimized, the charging area is maximized, the problems of charging efficiency reduction and charging incapability caused by dislocation of the transmitting end coil and the receiving end coil during wireless charging are avoided, the charging efficiency is improved, and the position freedom degree of the wireless charging equipment is also improved. The invention is suitable for different portable electronic devices and has the advantages of strong universality, high charging efficiency and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A wireless charging transmit coil, the wireless charging transmit coil comprising at least: at least three coil arrangement layers arranged in an up-down stacking manner, wherein,
the first coil lay out layer in the at least three coil lay out layers includes: at least three first coils arranged on the same plane, wherein the adjacent first coils are tangent to each other;
the second coil cloth laying layer includes: at least one second coil disposed between the first coil arranging layer and the third coil arranging layer;
the third coil cloth disposal layer includes: at least three third coils arranged on the same plane, wherein the adjacent third coils are tangent to each other;
the centers of the three first coils which are tangent to each other and the centers of the three third coils which are tangent to each other respectively form an equilateral triangle, the centers of the two equilateral triangles are overlapped in the stacking direction and are overlapped with the center of the second coil in the stacking direction, and therefore the charging blind area of the wireless charging transmitting coil is reduced.
2. The wireless charging transmitting coil of claim 1, wherein any one of the three coil layering layers further comprises: the fourth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; any one of the other two coil arranging layers further comprises: the fifth coil is arranged on the outer side of the coil, and adjacent coils are tangent to each other; and the fifth coil is arranged in a charging blind area generated after the other two layers of coils are arranged and laminated.
3. The wireless charging transmit coil of claim 1, wherein the first coil lay out layer further comprises: the fourth coil is arranged on the outer side of the first coil, and adjacent coils are tangent to each other; the second coil cloth laying layer still includes: the fifth coil is arranged on the outer side of the second coil, and adjacent coils are tangent to each other; the third coil floorcloth layer further includes: at least one sixth coil arranged on the same plane with the third coil, wherein the sixth coil is arranged on the outer side of the third coil, and adjacent coils are tangent to each other; the sixth coil is arranged in a charging blind area generated after the first coil arrangement layer and the second coil arrangement layer are stacked.
4. The wireless charging transmit coil of claim 3, wherein the first coil lay out layer comprises: the three first coils and the three fourth coils are arranged on the same plane and in four rows, wherein the first row comprises two first coils, the second row comprises one first coil, the third row comprises two fourth coils, the fourth row comprises one fourth coil, and adjacent coils are tangent to each other;
the second coil cloth laying layer includes: the second coil and the three fifth coils are arranged on the same plane in three rows, wherein the first row comprises one second coil, the second row comprises two fifth coils, the third row comprises one fifth coil, and adjacent coils are tangent to each other;
the third coil arranging layer includes: the three third coils and the three sixth coils are arranged on the same plane and in four rows, wherein the first row comprises one third coil, the second row comprises two third coils, the third row comprises one sixth coil, the fourth row comprises two sixth coils, and adjacent coils are tangent to each other.
5. The wireless charging transmitting coil of claim 1, wherein the ratio of the overlapping area of any coil to the total area of the coils is 0.47-0.71.
6. The wireless charging transmitting coil of any one of claims 1 to 5, wherein any one of the coil arrangement layers further comprises: the coil comprises a substrate and substrate positioning holes, wherein the substrate positioning holes are formed in the edges of two sides of the substrate and penetrate through the upper surface and the lower surface of the substrate, and the coil is formed in the substrate and has a preset distance with the substrate positioning holes.
7. The wireless charging transmitting coil according to claim 6, wherein the thickness of any coil laying layer is 0.31mm to 0.41mm, and the total thickness of the wireless charging transmitting coil is 1mm to 1.16 mm.
8. A wireless charging structure, characterized in that, wireless charging structure includes:
a base;
a magnetic shielding layer mounted on the upper surface of the base;
the wireless charging transmitting coil of any one of claims 1 to 7 mounted on the upper surface of the magnetic shielding layer;
the PCBA board is arranged on the lower surface of the base;
and the wire ends of the coils in the wireless charging transmitting coil are electrically connected with the bonding pads on the PCBA board.
9. The wireless charging structure according to claim 8, wherein the base comprises a base body, positioning columns and mounting columns, the positioning columns are arranged at two side edges of the upper surface of the base body, and the mounting columns are arranged at the lower surface of the base body;
the magnetic shielding layer is provided with a magnetic shielding positioning hole penetrating through the upper surface and the lower surface of the magnetic shielding layer, and the magnetic shielding layer is installed on the upper surface of the base body in an adaptive mode through the magnetic shielding positioning hole and the positioning column;
any coil arrangement layer in the wireless charging transmitting coil comprises a substrate, substrate positioning holes and coils, wherein the substrate positioning holes are formed in the edges of the two sides of the substrate and penetrate through the upper surface and the lower surface of the substrate, the coils are formed in the substrate and have preset intervals with the substrate positioning holes, and the wireless charging transmitting coil is mounted on the upper surface of the magnetic shielding layer in an adaptive mode through the substrate positioning holes and the positioning columns;
the PCBA board is provided with mounting holes penetrating through the upper surface and the lower surface of the PCBA board, and the PCBA board is mounted on the lower surface of the base body through the mounting holes and the mounting columns in an adaptive mode.
10. The wireless charging structure of claim 8 or 9, wherein the PCBA is provided with a connector electrically connected with the pad, and the wire end of each coil in the wireless charging transmitting coil is electrically connected with the pad through the connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340562.5A CN111180175A (en) | 2018-11-12 | 2018-11-12 | Wireless charging transmitting coil and wireless charging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340562.5A CN111180175A (en) | 2018-11-12 | 2018-11-12 | Wireless charging transmitting coil and wireless charging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111180175A true CN111180175A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811340562.5A Pending CN111180175A (en) | 2018-11-12 | 2018-11-12 | Wireless charging transmitting coil and wireless charging structure |
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| Country | Link |
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| CN (1) | CN111180175A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886722A (en) * | 2021-03-25 | 2021-06-01 | 深圳劲芯微电子有限公司 | Wireless charger and charging coil structure thereof |
| WO2022204496A1 (en) * | 2021-03-26 | 2022-09-29 | Aira, Inc. | Free positioning multi-device wireless charger |
-
2018
- 2018-11-12 CN CN201811340562.5A patent/CN111180175A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886722A (en) * | 2021-03-25 | 2021-06-01 | 深圳劲芯微电子有限公司 | Wireless charger and charging coil structure thereof |
| WO2022204496A1 (en) * | 2021-03-26 | 2022-09-29 | Aira, Inc. | Free positioning multi-device wireless charger |
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