TWI472116B - Structure and Process of Induction Plate for Wireless Power Transmission - Google Patents

Description

Wireless power transmission sensor board structure and its manufacturing process

The invention relates to a wireless power transmission induction board structure and a manufacturing process thereof, in particular to a wireless power transmission induction board, wherein the thickness of the positioning magnet does not exceed the thickness of the coil, and does not affect the structure of the magnetic force and the coil sensing capability and the manufacturing process thereof.

Press, in handheld electronic devices, such as mobile phones, PDAs (personal digital assistants), palmtop computers, notebook computers or tablets, etc., all powered by batteries, so that users can use them when there is no mains. And these electronic devices are equipped with a wired power supply to facilitate battery charging or power supply using the mains.

Due to advances in technology, a new type of wireless power transmission system has been developed to transmit power by electromagnetic induction to power the handheld electronic devices or to charge the batteries of the handheld electronic devices. The wireless power transmission system includes a power transmission module 1 and a power receiving module 2, as shown in FIG.

The power transmission module 1 and the power receiving module 2 both have a coil 11 and a sensor board 12. When the two are close to each other, the power transmission module 10 can input a power and convert it into an electromagnetic field, and the power is converted. The receiving module 20 can sense the electromagnetic field and convert it into an electrical output.

One end of the induction plate 12 is provided with a magnet 13 and the other end of the induction plate 12 is provided with an iron block 14. When the two are close to each other, the magnet 13 can magnetically absorb the iron block 14 so that the coils 11 at both ends can be exhausted. Possible close proximity maximizes the power sensed by the coil.

Due to cost considerations, the magnet 13 is designed in a direction that minimizes volume, minimizes volume, and maximizes magnetic force. Therefore, the magnet 13 is generally placed at the center of the coil 11 and the center of the coil 11 at the other end is placed with iron. Block 14, such that the thickness of the magnet 13 becomes one of the important factors affecting the magnitude of the surface magnetic force. In order for the magnet 13 to generate a large magnetic force to absorb the magnet block 14, a certain thickness is required, so that the magnet 13 is caused. The thickness exceeds the thickness of the coil 11.

However, the thickness of the magnet 13 exceeds the thickness of the coil 11, which in turn causes an increase in the overall thickness of the entire wireless power transmission module, which not only wastes space, increases manufacturing cost, but also affects magnetic field induction of transmitting and receiving coils and core plates at both ends. Capability, because the closer the distance between the two ends, the better the magnetic field induction, the better the power transmission, and vice versa.

Therefore, the inventor of the present invention proposes a wireless power transmission induction board structure, so that the magnet 13 can have a certain volume and thickness, and can be equal to the coil 11 without affecting the magnetic attraction of the magnet 13, and can reduce wireless power transmission. The overall thickness of the module can shorten the distance between the transmitting and receiving ends and optimize the inductive power transmission.

The main technical feature of the present invention is to provide a wireless power transmission induction board structure, which comprises at least: a core plate, which is provided with at least one groove on a surface; at least one induction coil is centrally hollowed out, and is disposed on The core plate, and the hollow portion corresponds to the groove; and at least one magnetic member is disposed at a hollow portion of the induction coil, and a lower portion thereof is embedded in the groove, so that the magnetic member and the magnetic member The height of the core plate is not greater than the height at which the induction coil is coupled to the core plate.

A second technical feature of the present invention is to provide a wireless power induction board process, which first prepares a core plate and opens at least one groove on one surface of the core plate; and then prepares at least one central hollowed-out induction a coil, the induction coil is adhered to the core plate, and the center of the induction coil is hollowed out corresponding to the groove of the core plate; finally, at least one magnetic member is disposed, and the magnetic member is placed in the center of the induction coil And bonding a portion of the lower portion of the magnetic member to the recess, such that a height of the magnetic member coupled to the core plate is less than or equal to a height at which the induction coil is coupled to the core plate.

The detailed description of the present invention and the accompanying drawings are not to be construed as limiting the invention.

Please refer to FIG. 2 , which is a perspective exploded view of the structure of the wireless power transmission sensing board of the present invention, and FIG. 3 is a combined perspective view of FIG. 2 , and FIG. 4 is a side view of the cross section of FIG. 3AA′. The power transmission sensing board 20 of the present invention may be a power transmission module or a power receiving module, and includes at least a core board 21, an induction coil 22 and a magnetic member 23, wherein the core board 21 has a first thickness H1. At least one groove 24 is provided on a surface. Preferably, the ratio of the depth D of the groove 24 of the core plate 21 to the thickness of the core plate 21 may be 1:1.15~6.3. Preferably, the core plate 21 is made of a magnet core. The material is pressed and can be made into a flexible flexible core plate. The structure and method for manufacturing the flexible core plate of the present invention will be described later.

The induction coil 22 has a second thickness H2, which is centrally hollowed out, and is disposed on the core plate 21, and the hollow portion of the coil 22 corresponds to the groove 24 of the core plate 21, and the area of the induction coil 22 The induction coil 22 has at least one lead wire 221 for referring to an induced current. Preferably, the lead wire 221 is provided with a strip at a position corresponding to the magnet core plate 21. The groove 211 is shaped such that the lead wire 221 can be buried in the groove 211 to prevent the lead wire 221 from affecting the height of the induction coil.

The magnetic member 23 of the present invention has a third thickness H3, which can be accommodated in the central hollow of the induction coil 22. A portion of the lower portion of the magnetic member 23 is embedded in the recess 24, so that the magnetic member 23 and the magnetic member 23 are The height of the core plate 21 is less than or equal to the height at which the induction coil 22 is coupled to the core plate 21, that is, H1-D+H3≦H1+H2.

Preferably, the groove 24 of the core plate 21 is circular, and the appearance of the magnetic member 23 is also cylindrical corresponding to the groove 24, as shown in FIG. 5, the first of the core plate and the magnetic member. As shown in the embodiment, preferably, the groove 24 and the groove 211 may have a gap partition wall 241, which is accommodated in the gap between the magnetic member 23 and the induction coil 22; or the recess of the core plate 21 The groove 24 is rectangular, and the appearance of the magnetic member 23 is also rectangular corresponding to the groove 24. As shown in the second embodiment of the core plate and the magnetic member of the present invention, the groove 211 is preferably The core plate 21 is penetrated.

Preferably, the magnetic member 23 can be a magnet having its own magnetic force, or can be a core without a magnetic force, but an electromagnetic force can be generated by an electric current flowing through the induction coil 22 surrounding the core.

The inductive coil 22 is adhered to the core plate 21 by an adhesive member 25 made of a non-conductive material, and the magnetic member 23 is also adhered to the recess 24 of the core plate 21 by the adhesive member 25, The adhesive member 25 can be a double-sided tape or an adhesive.

Please refer to FIG. 7 as a schematic diagram of the process of the wireless power transmission sensing board process of the present invention. The wireless power transmission sensing board process of the present invention first prepares a core board 21 (101) and is on a surface of the core board 21. At least one groove 23 (102) is opened, and then at least one induction coil 22 (103) is disposed. The induction coil 22 is centrally hollowed, and the induction coil 22 is adhered to the core plate 21 by an adhesive member 25. (104), and the center of the induction coil 22 is hollowed out corresponding to the groove 24 of the core plate 21.

Then, at least one magnetic member 23 (105) is disposed, and the magnetic member 23 is placed in the center hollow of the induction coil 22, and finally a portion of the lower portion of the magnetic member 23 is adhered to the recess 24 by the adhesive member 25. (106), such that the height of the magnetic member 23 combined with the core plate 32 is not greater than the height at which the induction coil 22 is coupled to the core plate 21.

Please refer to FIG. 8 , which is a schematic perspective view of the structure of the flexible iron core plate produced by the present invention, and FIG. 9 is a schematic diagram of the process flow thereof. The core plate 21 of the present invention may be formed by pressing a core material. In order to make the core plate flexible, the process first prepares the core plate 21 (201), and then performs a pattern on at least one surface of the core plate 21. The patterning process is performed on both sides, and a patterned multi-groove 41 (202) is formed on the surface of the core sheet 21.

However, the present invention can use a punching machine for patterning the core plate 21. As shown in the schematic diagram of FIG. 10, a plurality of toothed jigs are provided on the machine table, and when the core plate 21 is stamped by the jig, A patterned plurality of grooves 41 may be formed on the surface of the core plate 21, and the grooves 41 may have a concave triangular shape, an arc shape or a trapezoidal shape.

Next, the present invention breaks the core plate 21 according to the grooves 41, so that the core plate 21 becomes a plurality of independent core blocks (203), and the patterned groove 41 can be a horizontally long strip or a straight strip. As shown in FIG. 11A and FIG. 11B, the core plate 21 can be broken into a plurality of elongated core blocks, or the patterned grooves 41 can be in the shape of a horizontally staggered square, such as As shown in FIG. 11C, the core plate 21 is broken into a plurality of square-shaped core blocks, or the horizontally staggered portions of the checkered grooves 41 are separated by a gap without grooves, as shown in FIG. 11D. As shown, the patterned groove 41 may be in the form of a honeycomb, as shown in FIG. 11E, or other irregular geometric shapes and the like.

Finally, the present invention combines the core blocks into a flat shape, and at least one surface of the core piece assembly of the flat plate is adhered or covered with at least one flexible material 50 to form the induction plate (204), wherein the flexible plate is formed. The material 50 can use a non-conductive PET tape or an adhesive. If PET tape is used, the two adjacent core blocks can be closely spaced without gaps. If an adhesive is used, between two adjacent core blocks can be used. There is a small gap for receiving the adhesive.

The job is that the wireless power transmission sensing board structure and the manufacturing process thereof have the following advantages:

1. According to the foregoing structure of the present invention, the present invention has a groove in the core plate to embed a part of the magnetic member, so that the thickness of the magnetic member and the core plate can be combined not less than the thickness of the combination of the induction coil and the core plate, so that the whole wireless The sensing module for power transmission is as documented as possible.

2. The structure of the present invention can shorten the distance from the other end to maximize the transmitted power.

3. The structure of the present invention allows the magnetic member to be minimized, minimized in volume, and has maximum magnetization to save cost.

4. The invention can use the induction coil to form a magnetic member around a core. When the current flows through the induction coil, not only can the electric field transmit power, but also electromagnetic force can be generated to absorb the iron block at the other end.

The present invention is capable of providing a design that is quite different from the prior art by the above-mentioned disclosed technology, which can improve the overall use value, and is not found in the publication or public use before the application, and has already met the requirements of the invention patent. , 提出 filed an invention patent application in accordance with the law.

1. . . Power transmission module

2. . . Power receiving module

11. . . Coil

12. . . Sensor board

13. . . magnet

14. . . Iron block

20. . . Power transmission sensor board

twenty one. . . Iron core board

211. . . Trench

twenty two. . . Induction coil

221. . . Lead line

twenty three. . . Magnetic parts

twenty four. . . Groove

241. . . Gap partition

25. . . Adhesive

41. . . Trench

50. . . Flexible material

Figure 1 is a schematic diagram of a conventional power transmission system;

2 is a perspective exploded view of the wireless power transmission sensing board of the present invention;

Figure 3 is a schematic perspective view of the combination of Figure 2;

Figure 4 is a side elevational view of the cross section of Figure AA-A';

Figure 5 is a perspective view showing the first embodiment of the core plate and the magnetic member of the present invention;

Figure 6 is a perspective view showing a second embodiment of the core plate and the magnetic member of the present invention;

FIG. 7 is a schematic diagram of a process flow of the wireless power transmission sensing board of the present invention.

Figure 8 is a perspective view showing the structure of the flexible core plate produced by the present invention.

Figure 9 is a schematic view showing the process flow of the flexible core plate of the present invention.

Figure 10 is a schematic view of the present invention using a stamping machine for patterning and processing a core plate.

11A to E are schematic views of an embodiment of a patterned groove of the present invention.

20‧‧‧Power transmission sensor board

21‧‧‧ iron core board

211‧‧‧ trench

22‧‧‧Induction coil

221‧‧‧ lead line

23‧‧‧Magnetic parts

24‧‧‧ Groove

241‧‧‧ clearance wall

25‧‧‧Adhesive parts

Claims (34)

A wireless power transmission sensing board structure includes at least: a core plate having at least one groove on a surface; at least one induction coil having at least one lead wire and having a central hollow shape disposed on the core plate And the hollow portion corresponds to the groove; and at least one magnetic member is disposed at a hollow portion of the induction coil, and a lower portion thereof is embedded in the groove, so that the magnetic member is combined with the core plate The height is not greater than the height of the induction coil and the core plate; wherein the ratio of the depth of the core plate groove to the thickness of the core plate is 1:1.15~6.3. The wireless power transmission sensing board structure of claim 1, further comprising: at least one adhesive member, which is a non-conductive material for adhering the induction coil to the core plate, and bonding the magnetic member The lower portion is incorporated into the groove of the core plate. The wireless power transmission induction board structure according to claim 2, wherein the adhesive member is a double-sided tape or an adhesive. The wireless power transmission induction board structure according to claim 1, wherein the induction coil has an area smaller than the core plate. The wireless power transmission induction board structure according to claim 1, wherein the groove of the core plate is circular, and the magnetic member also has a cylindrical shape corresponding to the groove. The wireless power transmission sensing board structure according to claim 1, wherein the groove of the core plate has a rectangular shape, and the magnetic member also has a rectangular shape corresponding to the groove. The wireless power transmission induction board structure according to claim 1, wherein the magnetic member is a magnet. The wireless power transmission sensing board structure according to claim 1, wherein the magnetic component is formed by the induction coil around a core, and an electromagnetic force is generated by a current flowing through the induction coil. The wireless power transmission sensing board structure according to claim 1, wherein the lead wire is provided with a long groove at a position corresponding to the magnet core plate, so that the lead wire can be buried in the groove. . The wireless power transmission sensing board structure of claim 9, wherein the groove extends through the magnet core plate. The wireless power transmission induction board structure according to claim 9, wherein the groove and the groove have a gap partition wall. The wireless power transmission induction board structure according to claim 1, wherein the core plate is pressed from a core material. The wireless power transmission induction board structure according to claim 1, wherein the core plate is patterned on at least one surface to form a patterned multi-groove, and then broken into a plurality of independent core blocks to form a flat plate. And formed by adhering or coating at least one surface of the core sheet with at least one flexible material. The wireless power transmission sensing board structure according to claim 13, wherein the gully is in a concave triangular shape, an arc shape or a trapezoidal shape. The wireless power transmission sensing board structure according to claim 13 , wherein the groove is in the form of a horizontal strip or a straight strip, so that the core sheet can be broken into a plurality of long strips. The wireless power transmission sensing board structure according to claim 13 , wherein the groove is in the shape of a square bar which is staggered in a straight line, so that the core plate is broken into a plurality of square shapes. The wireless power transmission induction board structure according to claim 13, wherein the flexible material is a non-conductive PET tape or an adhesive. A wireless power induction board process, the process comprising at least the following steps: preparing a core plate; opening at least one groove on a surface of the core plate; preparing at least one induction coil having a central hollow shape; bonding the induction coil to the a core plate, and the center of the induction coil is hollowed out corresponding to the groove of the core plate; at least one magnetic member is disposed; and the magnetic member is placed at the center of the induction coil and adhered to the lower portion of the magnetic member In the groove, the height of the magnetic member and the core plate is less than or equal to the height of the induction coil and the core plate; wherein the ratio of the depth of the core plate groove to the thickness of the core plate is 1:1.15~ 6.3. The wireless power induction board process of claim 18, wherein the step of adhering the induction coil to the core plate is performed by using a double-sided tape or an adhesive made of a non-conductive material. The wireless power induction board process of claim 18, wherein the step of adhering a portion of the lower portion of the magnet to the recess is performed by using a double-sided tape or an adhesive made of a non-conductive material. . The wireless power induction board process of claim 18, wherein the induction coil has an area smaller than the core plate. The wireless power induction board process of claim 18, wherein the groove of the core plate has a circular shape, and the magnetic member also has a cylindrical shape corresponding to the groove. The wireless power induction board process of claim 18, wherein the groove of the core plate has a rectangular shape, and the magnetic member also has a rectangular shape corresponding to the groove. The wireless power induction board process of claim 18, wherein the magnetic component is a magnet. The wireless power induction board process of claim 18, wherein the magnetic component is formed by the induction coil around a core, and an electromagnetic force is generated by a current flowing through the coil. The wireless power transmission sensing board process of claim 18, wherein the lead wire is provided with a strip-shaped groove corresponding to the position of the magnet core plate, so that the lead wire can be buried in the groove. . The wireless power transmission sensing board process of claim 26, wherein the trench is through or not through the magnet core. The wireless power transmission sensing board process of claim 26, wherein the groove and the groove have a gap partition wall. The wireless power transmission induction board process of claim 18, wherein the core plate is formed by pressing a core material. The wireless power transmission sensing board process of claim 18, wherein the core board is flexible, and the process further comprises: performing a pattern processing on at least one surface of the core board to form a patterned plurality of grooves. a groove; the core plate is broken according to the grooves to form a plurality of independent core blocks; and the core blocks are combined into a flat shape, and at least one surface is adhered or coated with at least one flexible material. The wireless power transmission sensing board process of claim 30, wherein the trench is in a concave triangular shape, an arc shape or a trapezoidal shape. The wireless power transmission sensing board process of claim 30, wherein the groove is in the form of a horizontal strip or a straight strip, so that the core sheet can be broken into a plurality of strips. The wireless power transmission sensing board process of claim 30, wherein the groove is in the shape of a square bar which is staggered in a straight line, so that the core plate is broken into a plurality of square shapes. The wireless power transmission sensing board process of claim 30, wherein the flexible material is a non-conductive PET tape or an adhesive.