CN108109822A - Antenna assembly and the system for wireless charging/power supply - Google Patents

Abstract

The present invention relates to an antenna device and a system for wireless charging/power supply, the antenna device includes: an air-core coil, which can be connected to a power source or a capacitor; On one end surface of the air-core coil, wherein the sheet-like component has a slot extending from the inside of the sheet-like component to an edge of the sheet-like component and cutting through the sheet-like component. Utilizing the antenna device and system, not only can the charging/supply current be increased to improve the charging/supplying efficiency of the implanted medical instrument, but also the implanted medical instrument and the corresponding charging/supplying system can The calorific value is within a reasonable range.

Description

Antenna device and system for wireless charging/power supply

technical field

The invention relates to the field of medical instruments, in particular to an antenna device, a system for wireless charging/power supply, a medical system and a method for manufacturing the antenna device.

Background technique

An implantable medical device is a device that is placed in a patient's body to provide treatment for a disease to the patient. In order to enable the implantable medical instrument to work continuously, a wireless charging/power supply solution is usually used to provide power to it.

According to the current wireless charging/power supply scheme, the implantable medical instrument YL includes a rechargeable power supply/capacitor DY and a coil SX as a secondary coil, and is set outside the patient's body for wireless charging/power supply to the implantable medical instrument YL The charging/power supply system CD includes a coil FX as a primary coil, wherein a ferrite core is inserted into the coil FX as a magnetically permeable material to increase inductance. When the coil FX of the charging/power supply system CD is connected to the power supply and supplied with alternating current, the coil FX will generate an electromagnetic signal, and the coil SX of the implantable medical instrument YL will generate a current through the electromagnetic signal generated by the induction coil FX, and then the coil SX will generate A current of is supplied to the rechargeable power source/capacitor DY of the implantable medical instrument YL to charge/power it. Here, supplying power to a rechargeable power source is called charging, and supplying power to a capacitor is called power supply.

When the implantable medical device YL is a device with small power consumption such as a rechargeable brain pacemaker, vagus nerve stimulator, and sacral nerve stimulator, even if a small charge/supply current is used to The instrument YL is charged/powered, and the implantable medical instrument YL can also be charged/supplied quickly. Therefore, at present, a small charge/supply current is usually generated to charge/supply the implantable medical instrument YL. In this case, the heat generated by the implantable medical instrument YL and the charging system CD during the charge/supply can be within a reasonable range.

With the widespread application of implantable medical devices YL that consume a lot of power, such as spinal cord stimulators, generating a larger charging/supply current to improve the charging/supplying efficiency of implantable medical devices YL has become an urgent need. However, increasing the charge/supply current will cause the implantable medical instrument YL and the charging system CD to generate more heat during the charge/supply process, which is outside the reasonable range.

Contents of the invention

The solution of the present invention provides an antenna device, a system for wireless charging/power supply, a medical system and a method for manufacturing the antenna device, which can not only reduce the volume, but also increase the charging/supplying current to improve the charging of implanted medical instruments. / power supply efficiency, and can also make the heat generation of implantable medical instruments and corresponding charging / power supply systems in the process of charging / power supply within a reasonable range.

An antenna device according to an embodiment of the present invention, comprising: an air-core coil, which can be connected to a power source or a capacitor; and, a sheet member made of soft magnetic material, which is located on one of the end faces of the air-core coil , wherein the sheet member has a slot extending from the interior of the sheet member to an edge of the sheet member and cutting through the sheet member.

A system for wireless charging/power supply according to an embodiment of the present invention includes: the foregoing antenna device; and a controller configured to control the supply of alternating current to the antenna device.

A medical system according to an embodiment of the present invention includes: an implantable medical instrument, which includes a rechargeable power supply/capacitor and an antenna device, wherein the antenna device generates a current to feed the Rechargeable power supply/capacitor charging/power supply; the aforementioned antenna device placed outside the human body, wherein the air-core coil in the antenna device generates the electromagnetic signal when supplied with alternating current; and, a controller for controlling The AC power is supplied to the air-core coil of the antenna device for control.

A method for manufacturing an antenna device according to an embodiment of the present invention, comprising: obtaining a sheet-shaped part made of soft magnetic material, wherein the sheet-shaped part has a an edge of the sheet member and cut through the sheet member; and disposing the sheet member on one of the end faces of the air-core coil to obtain an antenna device.

As can be seen from the above description, the solutions of the embodiments of the present invention use soft magnetic materials as magnetic permeable materials to increase inductance. Compared with ferrite cores, soft magnetic materials with smaller volume and weight can increase the same inductance. Therefore, the solutions of the embodiments of the present invention can use soft magnetic materials with smaller volumes as magnetic permeable materials, greatly reducing the weight of medical instruments, and increasing the flexibility of volume and structural design. Therefore, during the charging/power supply process of implantable medical instruments and corresponding charging/power supply systems, the energy transmission efficiency of wireless charging/power supply is improved due to the strong gathering of magnetic force lines by soft magnetic materials, and the division of nanocrystalline magnetic sheets can Reduce the loss of eddy current on it, and further improve the energy transmission efficiency. Therefore, in the case of ensuring that the heat generated by the implanted medical instrument and the corresponding charging/power supply system during the charging/power supply process is within a reasonable range, a larger charging/supplying current can be generated for the implanted medical instrument. For charging/power supply. Therefore, compared with the prior art, the solution of the embodiment of the present invention can not only increase the charge/supply current to improve the charge/supply efficiency of the implantable medical instrument and reduce its weight and volume, but also make the implantable medical instrument The heat generated by the medical instrument and the corresponding charging/power supply system during the charging/power supply process is within a reasonable range.

Description of drawings

Other objects, features and benefits of the present invention will become more apparent through the following detailed description in conjunction with the accompanying drawings.

Fig. 1 shows a schematic diagram of a medical system according to an embodiment of the present invention.

2A-2C show schematic diagrams of an antenna arrangement according to one embodiment of the present invention.

Fig. 3 shows a schematic diagram of an antenna arrangement according to an embodiment of the present invention.

Fig. 4 shows a schematic diagram of a system for wireless charging/power supply according to an embodiment of the present invention.

Fig. 5 shows a schematic diagram of a medical system according to an embodiment of the present invention.

FIG. 6 shows a flow chart of a method for producing an antenna arrangement according to an exemplary embodiment of the invention.

Detailed ways

Traditional ferrite materials are made into thin sheets, which is difficult to process, and the material is brittle, making it difficult for industrialization. New magnetic materials such as nanocrystalline materials can be applied industrially due to the mature preparation methods. Nanocrystalline soft magnetic material is a kind of soft magnetic material with ultra-fine grain size (about 10nm) obtained after proper crystallization and annealing of amorphous alloy. Its outstanding advantage is that it has the high saturation magnetic induction of iron-based amorphous alloy. The strength and high magnetic permeability of cobalt-based amorphous alloys, the saturation magnetostriction coefficient close to zero, and certain electrical conductivity can be made into flexible ultra-thin strips. These new materials bring opportunities to further reduce eddy current loss, increase the charging power of implanted devices, and reduce the volume of devices.

At the same time, the strong concentration of magnetic field lines by nanocrystalline materials can further improve energy transmission efficiency. The division of the nanocrystalline magnetic sheet can reduce the eddy current loss of the eddy current on it, and further improve the energy transmission efficiency.

In the following, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a medical system according to an embodiment of the present invention. As shown in FIG. 1 , a medical system 100 may include an implantable medical instrument 110 and a charging/power supply system 150 for wireless charging/power supply.

The implantable medical device 110 can be placed in the patient's body, which can be, but not limited to, a rechargeable brain pacemaker, a vagus nerve stimulator, a sacral nerve stimulator, or a spinal cord stimulator. The implantable medical device 110 may include an antenna device 114 and a rechargeable power source/capacitor 118 connected to the antenna device 114 . The antenna device 114 may be an air-core coil for generating current to charge or power the rechargeable power supply/capacitor 118 when an electromagnetic signal is sensed. The rechargeable power supply/capacitor 118 is used to provide working power to the implantable medical device 110 . In one aspect, the implantable medical device 110 may be encapsulated within a titanium shell when placed within the patient's body.

The charging system 150 can be placed outside the patient's body to generate an electromagnetic signal when charging/powering the implantable medical device 110, and the antenna device 114 of the implantable medical device 110 will induce the electromagnetic signal to generate a current for the implantable medical device 110. The rechargeable power supply/capacitor 118 charges or supplies power. The charging/power supply system 150 may include an antenna arrangement 154 and a controller 158 . The antenna assembly 154 is used to generate an electromagnetic signal when connected to a power source and supplied with an alternating current. The controller 158 is used to control the supply of AC power to the antenna device 154, for example, but not limited to, allowing the supply of AC power to the antenna device 154, stopping the supply of AC power to the antenna device 154, or adjusting all The size of the alternating current provided, etc.

2A-2C show schematic diagrams of an antenna arrangement according to one embodiment of the present invention. As shown in FIGS. 2A-2C , the antenna assembly 154 may include an air core coil 162 and a sheet member 164 made of nanocrystals.

The air-core coil 162 can be connected to a power source to be supplied with AC power, wherein the power source provides AC power to the air-core coil 162 under the control of the controller 158 .

The hollow coil 162 is a hollow cylindrical coil. On each of the two end faces D1 and D2 of the air-core coil 162 , the air-core coil 162 has an annular solid portion S1 and a circular hollow portion S2 .

The sheet component 164 is located on the end face D1 of the air-core coil 162 and acts as a magnetically permeable material to provide inductance to the air-core coil 162 . Wherein, compared with the end surface D2 of the air-core coil 162 , the end surface D1 of the air-core coil 162 is farther away from the antenna device 114 of the implantable medical instrument 110 .

The sheet member 164 includes a first portion F1 and a second portion F2. The first portion F1 of the sheet member 164 is located on the solid portion S1 of the end face D1 of the air-core coil 162 . The first part F1 of the sheet component 164 has the same shape as the solid part S1 of the end face D1 of the air-core coil 162, but is smaller than the solid part S1 of the end face D1 of the air-core coil 162 in the radial direction, for example, 1-5 mm smaller, etc. . The second portion F2 of the sheet member 164 is located on the hollow portion S2 of the end face D1 of the air-core coil 162 .

The sheet member 164 has a cutout QC extending from the inside of the second portion F2 of the sheet member 164 to the edge of the first portion F1 , which cuts through the sheet member 164 . The first portion F1 of the sheet member 164 has a cutout QC (that is, a cutout QC on the first portion F1 of the sheet member 164) having a width of 0.5-10 mm, and the second portion of the sheet member 164 F2 has a ratio of the surface area of the cutout QC (ie, the cutout QC on the second portion F2 of the sheet member 164 ) to the total surface area of the second portion F2 greater than 50%.

In the second part F2 of the sheet member 164, the solid part remaining after being cut off by the notch QC is a spiral structure LX, the width of the spiral of which is 0.5-5 mm.

The antenna device 154 can be manufactured according to the following method: first, the sheet member 164 is made of nanocrystals; Cutting groove QC on the edge of the second part F2 of the shaped part 164; finally, the thin part 164 is arranged on one of the end faces D1 of the air-core coil 162 to obtain the antenna device 154.

It can be seen from the above description that, in the embodiment of the present invention, the charging/power supply system 150 uses nanocrystals instead of ferrite cores as a magnetically permeable material to increase inductance. Due to the fact that under the same area, nanocrystals can provide greater inductance than ferrite cores (for example, for the same air-core coil, the increased inductance of annular nanocrystal sheets with a thickness of about 20 μm, an outer diameter of 60 mm, and an inner diameter of 45 mm can reach the increased inductance of a ferrite core with a diameter of 45mm, a thickness of 7mm and a weight of 50g), therefore, compared with the ferrite core, the charging/power supply system 150 requires a smaller area of nanocrystals to provide same inductance. Because nanocrystals, as soft magnetic materials, strongly gather the magnetic field lines, which improves the energy transmission efficiency of wireless power supply/charging. Therefore, compared with using ferrite cores as magnetic conductors, the charging/power supply system 150 uses nanocrystals as conductors. The magnetic material can increase the charge/supply current generated in the implantable medical instrument 110 to improve the implantable medical The charging/power supply of the instrument 110 improves the charging/power supply efficiency of the implantable medical instrument 110 . Moreover, using nanocrystals with a smaller volume and weight as a magnetically conductive material can easily make the implantable medical device 110 and the charging/power supply system 150 smaller and lighter, so that it is easy for patients to wear and use.

In addition, there is a slit QC extending from the inside of the sheet member 164 to the edge of the sheet member 164 and cutting through the sheet member 164 in the sheet member 164 made of nanocrystals, which can increase the inductance sufficiently. In this case, the heat generated by the medical instrument 110 and the charging/power supply system 150 can be further reduced. Moreover, the division of the sheet-shaped component 164 made of nanocrystalline magnetic sheets can reduce the loss of eddy currents on the sheet-shaped component 164 during wireless charging/power supply, and further improve energy transmission efficiency. Moreover, tests have shown that when the width of the groove QC positioned on the first part F1 of the chip part 164 is 0.5-10 mm, the surface area of the groove QC positioned on the second part F2 of the chip part 164 is the same as that of the second part F2. When the ratio of the total surface area of the medical device 110 and the charging/power supply system 150 is greater than 50%, and the solid part of the second part F2 of the sheet-like part 164 is a spiral structure and the width of the spiral is 0.5-5 mm, the medical instrument 110 and the charging/power supply system 150 The heat generated during charging/power supply is relatively small.

In addition, the first portion F1 of the sheet member 164 is 1 mm smaller than the solid portion S1 of the end face D1 of the air-core coil 162 in the radial direction, and the size of the first portion F1 of the sheet member 164 is equal to or larger than the end face D1 of the air-core coil 162 Compared with the size of the physical part S1 of the , the heat generated by the medical instrument 110 and the charging/supplying system 150 during the charging/supplying process can be further reduced with a small reduction in the increased inductance.

other variants

Those skilled in the art should understand that, although in the above embodiment, the width of the slot QC on the first part F1 of the chip part 164 is 0.5-10 mm, the slot QC on the second part F2 of the chip part 164 The ratio of the surface area of the QC to the total surface area of the second part F2 is greater than 50%, and the solid part of the second part F2 of the sheet member 164 is a helical structure and the width of the helix is 0.5-5 mm, so that The heat generated by the medical instrument 110 and the charging/power supply system 150 during the charging/power supply process is relatively small, however, the present invention is not limited thereto. In some other embodiments of the present invention, under the condition that the heat generated by the medical instrument 110 and the charging/power supply system 150 during the charging/power supply process is within a reasonable range, the slot on the first part F1 of the sheet member 164 The width of the QC may not be 0.5-10 mm, the ratio of the surface area of the cut groove QC on the second part F2 of the sheet-like part 164 to the total surface area of the second part F2 may be less than or equal to 50%, and/or, the sheet-shaped The width of the spiral of the solid part of the second part F2 of the part 164 is not 0.5-5 mm.

Those skilled in the art should understand that although in the above embodiment, the solid portion of the second portion F2 of the sheet member 164 is a spiral structure, the present invention is not limited thereto. In some other embodiments of the present invention, the solid portion of the second portion F2 of the sheet member 164 may also be a structure of other suitable shapes besides the spiral structure.

Those skilled in the art should understand that although in the above embodiment, the first portion F1 of the sheet member 164 is smaller in the radial direction than the solid portion S1 of the end face D1 of the air-core coil 162, however, the present invention is not limited thereto . In some other embodiments of the present invention, the size of the first part F1 of the sheet member 164 can also be It is equal to or larger than the size of the solid portion S1 of the end face D1 of the air-core coil 162 .

Those skilled in the art should understand that although in the above embodiments, the sheet member 164 is located on the end face D1 of the air-core coil 162 farther away from the implantable medical device 110 , the present invention is not limited thereto. In some other embodiments of the present invention, the sheet component 164 may also be located on the end face of the air-core coil 162 that is closer to the implantable medical instrument 110 .

Those skilled in the art should understand that although in the above embodiments, the magnetically permeable material used by the antenna device 154 is nanocrystals, the present invention is not limited thereto. In some other embodiments of the present invention, the magnetically permeable material used by the antenna device 154 may also be a soft magnetic material other than nanocrystals, such as an amorphous material.

Those skilled in the art should understand that, although in the above embodiment, the first part F1 and the second part F2 of the sheet member 164 are made of the same soft magnetic material (such as nanocrystalline or amorphous material, etc.), however , the present invention is not limited thereto. In some other embodiments of the present invention, the first portion F1 and the second portion F2 of the sheet component 164 may also be made of different soft magnetic materials.

Those skilled in the art should understand that although in the above embodiments, the antenna device 114 included in the implantable medical instrument 110 is an air-core coil, the present invention is not limited thereto. In some other embodiments of the present invention, the antenna device 114 included in the implantable medical instrument 110 may also be the antenna device 154 .

Those skilled in the art should understand that although in the above embodiments, the air-core coil 162 is a hollow cylindrical coil, the present invention is not limited thereto. In some other embodiments of the present invention, the air-core coil 162 may be a coil of any shape with a hollow center.

Fig. 3 shows a schematic diagram of an antenna arrangement according to an embodiment of the present invention. As shown in FIG. 3 , the antenna device 300 may include an air-core coil 310 that can be connected to a power supply or a capacitor, and a sheet component 320 made of soft magnetic material located on one end face of the air-core coil 310 , wherein the sheet component 320 There is a slot extending from the inside of the sheet member 320 to the edge of the sheet member 320 and cut through the sheet member 320 .

In the first aspect, the sheet member 320 may include a first portion and a second portion, wherein the first portion has substantially the same shape as a solid portion of the one end face of the air-core coil 310 and is located on the solid portion , and, the second portion is located on the hollow portion of one of the end faces of the air-core coil 310, and wherein, the first portion has a width of the slot of 0.5-10 mm, and/or, the The second portion has a ratio of the surface area of the slots to the total surface area of the second portion greater than 50%.

In a second aspect, the solid portion of the second portion may be a helical structure.

In a third aspect, the width of the spirals of the helical structure may be 0.5-5 mm.

In the fourth aspect, the first portion may be smaller than the solid portion of the one end surface of the air-core coil.

In a fifth aspect, the first part and the second part may be made of different soft magnetic materials.

In a sixth aspect, both the first part and the second part may be made of amorphous material or nanocrystals.

Fig. 4 shows a schematic diagram of a system for wireless charging/power supply according to an embodiment of the present invention. As shown in FIG. 4 , a system 400 for wireless charging/power supply may include the antenna device 300 shown in FIG. 3 and a controller 410 for controlling the supply of AC power to the antenna device 300 .

Fig. 5 shows a schematic diagram of a medical system according to an embodiment of the present invention. As shown in FIG. 5, the medical system 500 may include an implantable medical instrument 510, which includes a rechargeable power supply/capacitor and an antenna device, wherein the antenna device generates a current to charge the rechargeable device when it senses an electromagnetic signal. Type power supply/capacitor charging or power supply.

The medical system 500 may further include the antenna device 300 shown in FIG. 3 placed outside the human body, wherein the air-core coil 310 in the antenna device 300 generates the electromagnetic signal when supplied with alternating current.

The medical system 500 may further include a controller for controlling the supply of the AC power to the air-core coil 310 of the antenna device 300 .

In the first aspect, the one end surface of the air-core coil 310 is away from the antenna device relative to the other end surface of the air-core coil 310 .

In the second aspect, the antenna device may be a coil or the antenna device 300 shown in FIG. 3 .

FIG. 6 shows a flow chart of a method for producing an antenna arrangement according to an exemplary embodiment of the invention.

As shown in FIG. 6 , method 600 may include, at block 610, obtaining a sheet-like component made of a soft magnetic material, wherein the sheet-like component has a A slot at the edge of a component and cut through the sheet-like component.

The method 600 may further include, at block 620, disposing the sheet-like component on one of the end faces of the air-core coil to obtain an antenna device.

In a first aspect, block 610 may comprise: forming the sheet member from a soft magnetic material; and, cutting through the sheet member, a cut extending from the interior of the sheet member to the sheet The cutout on the edge of the shaped part.

In a second aspect, the sheet member includes a first portion and a second portion, wherein the first portion has substantially the same shape as a solid portion of the one end face of the air coil and is located on the solid portion , and, the second part is located on the hollow part of the one end surface of the air-core coil, and wherein the first part has a width of the slot of 0.5-10 mm, and/or, The second portion has a ratio of the surface area of the slots to the total surface area of the second portion greater than 50%.

In a third aspect, the solid portion of the second portion is a helical structure.

In a fourth aspect, the spirals of the helical structure have a width of 0.5-5 mm.

In a fifth aspect, the first portion is smaller than the solid portion of the one end surface of the air-core coil.

It should be understood by those skilled in the art that various modifications and changes can be made to the various embodiments disclosed above without the essence of the invention, and these modifications and changes should fall within the protection scope of the present invention. Therefore, the present invention The scope of protection will be defined by the appended claims.

Claims (13)

1. a kind of antenna assembly, including：

Air core coil may be connected to power supply/capacitance；And

The sheet component made of soft magnetic materials is located on one of end face of the air core coil,

Wherein, the sheet component has from the internal stretch of the sheet component and to the edge of the sheet component and cuts through The grooving of the sheet component.

2. antenna assembly as described in claim 1, wherein

The sheet component includes first portion and second portion, wherein

The first portion has shape substantially identical with the entity part of one of end face of the air core coil Shape and in the entity part and

The second portion is located on the hollow parts of one of end face of the air core coil,

Wherein, the width for the grooving that the first portion has for 0.5-10 millimeters and/or, the second portion has The ratio of total surface area of surface area and the second portion of the grooving be more than 50%.

3. antenna assembly as claimed in claim 2, wherein

The entity part of the second portion is spiral form structure.

4. antenna assembly as claimed in claim 3, wherein

The width of the helical of the spiral form structure is 0.5-5 millimeters.

5. antenna assembly as claimed in claim 2, wherein

The first portion is smaller than the entity part of one of end face of the air core coil.

6. antenna assembly as claimed in claim 2, wherein

The first portion and the second portion are made of different soft magnetic materials.

7. antenna assembly as claimed in claim 2, wherein

The first portion and the second portion be all by non-crystalline material or it is nanocrystalline made of.

8. a kind of system for wireless charging/power supply, including：

Any one of antenna assembly in claim 1-7；And

Controller, for controlling providing alternating current to the antenna assembly.

9. a kind of medical system, including：

Implantation medical equipment, including rechargeable type power supply/capacitance and antenna equipment, wherein, the antenna equipment is when sensing To electric current is generated during electromagnetic signal the rechargeable type power supply/capacitance to be given to charge or power supply；

Any one of antenna assembly in claim 1-7 out of the human body is placed, wherein, in the antenna assembly The air core coil generates the electromagnetic signal when being provided alternating current；And

Controller, for controlling providing the alternating current to the air core coil of the antenna assembly.

10. medical system as claimed in claim 9, wherein

One of end face of the air core coil is compared with another end face of the air core coil away from the antenna Equipment.

11. medical system as claimed in claim 9, wherein

The antenna equipment is any one of antenna assembly in coil or claim 1-7.

12. a kind of method of any one of antenna assembly in manufacturing claims 1-7, including：

The sheet component made of soft magnetic materials is obtained, wherein, the sheet component has to be prolonged from the inside of the sheet component It reaches the edge of the sheet component and cuts through the grooving of the sheet component；And

The sheet component is arranged on one of end face of air core coil, to obtain antenna assembly.

13. method as claimed in claim 12, wherein, obtaining the sheet component made of soft magnetic materials includes：

The sheet component is made using soft magnetic materials；

In a manner of cutting through the sheet component, cut from the internal stretch of the sheet component to the edge of the sheet component The grooving.