CN111555395A - Heat conduction method of wireless charging receiving coil module and module thereof - Google Patents
Heat conduction method of wireless charging receiving coil module and module thereof Download PDFInfo
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- CN111555395A CN111555395A CN202010427468.4A CN202010427468A CN111555395A CN 111555395 A CN111555395 A CN 111555395A CN 202010427468 A CN202010427468 A CN 202010427468A CN 111555395 A CN111555395 A CN 111555395A
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- heat
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- wireless charging
- heat conduction
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a heat conduction method of a wireless charging receiving coil module and the module thereof. The wireless receiving coil module that charges includes: a coil layer; a magnetic shield layer adhered to the coil layer; a thermally conductive layer adhered to the magnetic shield layer; a thermal insulation layer adhered to the thermally conductive layer. According to the invention, by utilizing the excellent capability of the aerogel for blocking the heating source, the aerogel material is implanted into the wireless charging receiving coil module, the heat conduction direction is changed, the heat generated by the coil is conducted to the shell or other heat dissipation devices, the coil is blocked from transferring heat to the battery, the time of the battery heating to the set protection temperature is prolonged, and further, the high-power wireless charging time is prolonged, so that more electric energy can be charged into the battery in the same time.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a heat conduction method of a wireless charging receiving coil module and the wireless charging receiving coil module.
Background
At present, the wireless charging power of mainstream wireless charging equipment in the market is higher and higher, and some wireless charging equipment reach 25-40W, but the charging power is reduced after high-power charging (>15W) for only a few minutes, and the most important reason is as follows: when high-power wireless charging is carried out, the receiving coil generates heat seriously, the wireless charging receiving coil is tightly attached to the battery, heat is easily conducted to the battery, and the service life of the battery can be shortened due to overhigh temperature. In order to protect the service life of the battery, the current method is to charge for a period of time with high power and charge with reduced power, and the current charging protection mechanism method prolongs the charging time of the battery, so that the charging experience of consumers is poor.
Disclosure of Invention
The invention aims to provide a heat conduction method of a wireless charging receiving coil module and the wireless charging receiving coil module, which isolate heat generated by a receiving coil from a battery by changing the heat conduction direction and prolong the high-power wireless charging time.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a heat conduction method for wireless charging receiving coil module is characterized in that aerogel is used in the module to guide the heat generated by the coil to a shell or other heat dissipation devices.
Furthermore, in the heat conduction method of the wireless charging receiving coil module, the coil layers are connected in parallel by adopting a multi-layer coil, so that the impedance of the coil is reduced.
Further, in the heat conduction method of the wireless charging receiving coil module, the heat conduction material of the heat conduction layer is graphite, heat conduction glue or heat conduction material with the function of assisting heat conduction coated or adhered on the surface.
Furthermore, in the heat conduction method of the wireless charging receiving coil module, the magnetic shielding layer is ferrite, nanocrystalline, copper foil and metal conductor.
Furthermore, the heat insulation layer in the heat conduction method of the wireless charging receiving coil module is a heat insulation material with the heat transfer rate of less than 1W/(m.K).
Further, in the heat conduction method of the wireless charging receiving coil module, any one of the heat conduction layer and the heat insulation layer can be repeatedly superposed behind the coil layer for many times.
As an option, the wireless charging receiving module can cancel the heat conducting layer, directly contacts with the mobile phone back shell through the coil, and radiates heat through the shell, so that the cost and the module thickness are saved.
A wireless receiving coil module that charges, it includes: a coil layer; a magnetic shielding layer adhered to the coil layer for isolating a magnetic field; the heat conduction layer is bonded on the magnetic shielding layer and used for temperature equalization; and the heat insulation layer is bonded to the heat conduction layer and is used for separating heat generated by the coil and the magnetic separation sheet.
The coil of the coil layer is bonded with the magnetic shielding sheet (as a magnetic shielding layer) through the double faced adhesive tape, and the magnetic shielding sheet has lower magnetic resistance, so that magnetic lines of force generated by the coil during working return through a low-magnetic-resistance channel of the magnetic shielding sheet, and the magnetic shielding sheet plays a role in isolating a magnetic field.
Furthermore, each structural layer in the wireless charging receiving coil module is bonded through a double-sided adhesive tape.
Further, the graphite flake adopted in the heat conducting layer is larger than the magnetic separation sheet adopted by the magnetic shielding layer, and the heat conducting layer is attached to the rear shell of the mobile phone or other heat radiating devices.
Further, the thermal-insulating layer adopts an aerogel film.
Further, the heat conducting layer can be made of heat conducting materials such as graphite flakes, heat conducting silicone grease and phase change energy storage materials.
Compared with the prior art, the invention has the advantages that: according to the invention, by utilizing the excellent capability of the aerogel for blocking the heating source, the aerogel material is implanted into the wireless charging receiving coil module, the heat conduction direction is changed, the heat generated by the coil is conducted to the shell or other heat dissipation devices, the coil is blocked from transferring heat to the battery, the time of the battery heating to the set protection temperature is prolonged, and further, the high-power wireless charging time is prolonged, so that more electric energy can be charged into the battery in the same time.
Drawings
Fig. 1 is a schematic view of a heat conduction method of a wireless charging receiving coil module according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a wireless charging coil module in embodiment 2 of the present invention.
Fig. 3 is an exploded view of a wireless charging coil module according to embodiment 2 of the present invention.
Detailed Description
The technical solution adopted by the present invention will be further explained with reference to the schematic drawings.
In a first embodiment of the present invention, a heat conduction method for a wireless charging receiving coil module is provided, in which an aerogel is used to guide heat generated by a coil to a housing or other heat dissipation device, referring to fig. 1, the coil and a magnetic shielding sheet generate a heat source 10, the heat (indicated by an arrow P) of the heat source 10 is expanded to be uniformly heated as a whole through a heat dissipation material 11, the heat dissipation material can also be connected to the heat dissipation device to conduct the heat out, a heat insulation material 12 can block the heat source 10, only a small amount of heat can reach a battery 13, and the method changes the direction of heat conduction, so that the heat at the position where the heat source 10 reaches the battery 13 is greatly reduced, and the service life of the battery 13 is.
In another embodiment, the wireless charging receiving module in the method can cancel the heat conduction layer, directly contact with the mobile phone back shell through the coil, and radiate heat through the shell, so as to save cost and module thickness.
And the coil layer formed by the coil can adopt a mode of connecting a plurality of layers of coils in parallel to reduce the impedance of the coil.
The heat dissipation material 11 includes, but is not limited to, graphite, heat conductive glue, surface coating or adhering with heat conductive material to assist heat conduction.
The magnetic shielding layer attached to the back of the coil includes but is not limited to ferrite, nanocrystal, copper foil, metal conductor and other shielding materials.
The thermal insulation material 12 in the method is a thermal insulation material with thermal conductivity less than 1W/(m.K), such as aerogel and thermal insulation foam.
A second embodiment of the present invention provides a wireless charging receiving coil module (see fig. 2 to 3), which includes: coil layer 1, magnetic shield layer 3, heat-conducting layer 5, insulating layer 7.
In this embodiment, the coil in the coil layer 1 is a litz wire wound coil or a PCB or FPC coil, and the coil layer herein is formed by connecting a plurality of coils in parallel. The magnetic shield layer 3 for isolating a magnetic field and adhering to the coil layer uses ferrite or nanocrystalline material. The heat conducting layer 5 for temperature equalization and adhesion in the magnetic shielding layer adopts heat conducting materials such as graphite flakes, heat conducting silicone grease, phase change energy storage materials and the like, and the heat insulating layer 7 for isolating the heat generated by the coil and the magnetic isolation sheet and adhesion in the heat conducting layer adopts heat insulating materials such as aerogel, foam and the like.
The heat conduction material of the heat conduction layer in the wireless charging receiving coil module can be other heat conduction materials which assist in heat conduction and are coated or pasted on the surface of the heat conduction layer besides graphite and heat conduction glue.
The magnetic shielding layer can be made of copper foil and metal conductors besides ferrite and nanocrystalline.
It should be noted that any one of the heat conduction layer and the heat insulation layer can be repeatedly superposed behind the coil layer for multiple times to achieve a better heat insulation effect.
Each structural layer bonds through the double faced adhesive tape among this wireless receiving coil module that charges, the double faced adhesive tape who bonds between coil layer 1 and the magnetism shielding layer 3 in the figure 3 is injectd as first double faced adhesive tape 2, the double faced adhesive tape who bonds between magnetism shielding layer 3 and the heat-conducting layer 5 is injectd as second double faced adhesive tape 4, the double faced adhesive tape who bonds between heat-conducting layer 5 and the insulating layer 7 is injectd as third double faced adhesive tape 6, the graphite flake pastes the back at the magnetism isolating piece (magnetism shielding layer 3 adopts magnetism isolating piece) through second double faced adhesive tape, plays the effect of equal.
As another embodiment, the graphite sheet may be designed to be slightly larger than the magnetic shield sheet (magnetic shield layer 3) and attached to the rear case of the mobile phone or other heat dissipating device, so as to accelerate the heat dissipation of the coil and the magnetic shield sheet by the rear case of the mobile phone or other heat dissipating device.
Adopt thermal-insulated film's insulating layer 7 to paste behind the graphite flake through third double faced adhesive tape 6, thermal-insulated film can adopt the aerogel film, and the aerogel has good heat-proof quality, separates the harmful effects that the heat that coil and magnetism-isolating sheet produced caused the battery.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A heat conduction method of a wireless charging receiving coil module is characterized in that heat generated by a coil is guided to a shell or other heat dissipation devices by utilizing aerogel.
2. The method of claim 1, wherein the coil layers are connected in parallel by multiple layers of coils.
3. The heat conduction method of the wireless charging receiving coil module according to claim 1, wherein the heat conduction layer is made of graphite, heat conduction glue or heat conduction material coated or adhered with surface coating for assisting heat conduction.
4. The heat conduction method of the wireless charging receiving coil module as claimed in claim 1, wherein the magnetic shielding layer is ferrite, nanocrystal, copper foil, or metal conductor.
5. The method for transferring heat of a wireless charging receiver coil module of claim 1, wherein the thermal insulation layer is a thermal insulation material with a heat transfer rate of less than 1W/(m-K).
6. The heat conduction method of the wireless charging receiving coil module according to any one of claims 1 to 6, wherein any one of the heat conduction layer and the heat insulation layer in the module can be repeatedly stacked behind the coil layer for a plurality of times.
7. A wireless receiving coil module that charges, its characterized in that, it includes:
a coil layer;
a magnetic shielding layer adhered to the coil layer for isolating a magnetic field;
the heat conduction layer is bonded on the magnetic shielding layer and used for temperature equalization;
and the heat insulation layer is bonded to the heat conduction layer and is used for separating heat generated by the coil and the magnetic separation sheet.
8. The wireless charging receiver coil module of claim 7, wherein the structural layers of the wireless charging receiver coil module are bonded together by double-sided adhesive tape.
9. The wireless charging receiving coil module as claimed in claim 7, wherein the graphite sheet used in the heat conducting layer is larger than the magnetic separation sheet used in the magnetic shielding layer, and the heat conducting layer is attached to the rear case of the mobile phone or other heat dissipating device.
10. The wireless charging receiving coil module as claimed in claim 7, wherein the thermal insulation layer is made of aerogel film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010427468.4A CN111555395A (en) | 2020-05-19 | 2020-05-19 | Heat conduction method of wireless charging receiving coil module and module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010427468.4A CN111555395A (en) | 2020-05-19 | 2020-05-19 | Heat conduction method of wireless charging receiving coil module and module thereof |
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| Publication Number | Publication Date |
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| CN111555395A true CN111555395A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010427468.4A Pending CN111555395A (en) | 2020-05-19 | 2020-05-19 | Heat conduction method of wireless charging receiving coil module and module thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115678449A (en) * | 2022-10-27 | 2023-02-03 | 东莞市恒易电子科技有限公司 | Wireless charging nanocrystalline material processing technology suitable for automobiles and application thereof |
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| CN208285022U (en) * | 2018-01-19 | 2018-12-25 | 郭子龙 | Multi-application wireless charger |
| CN208423894U (en) * | 2018-08-10 | 2019-01-22 | Oppo广东移动通信有限公司 | Wireless charger |
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2020
- 2020-05-19 CN CN202010427468.4A patent/CN111555395A/en active Pending
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| US20140254819A1 (en) * | 2008-04-10 | 2014-09-11 | Apple Inc. | Deformable controller for electronic device |
| CN105874628A (en) * | 2013-11-08 | 2016-08-17 | 飞利浦灯具控股公司 | Battery module, battery pack, and system comprising a battery module |
| KR20150141402A (en) * | 2014-06-10 | 2015-12-18 | 주식회사 아모센스 | Heat radiation and insulation sheet and portable terminal equipment having the same |
| CN208285022U (en) * | 2018-01-19 | 2018-12-25 | 郭子龙 | Multi-application wireless charger |
| CN208423894U (en) * | 2018-08-10 | 2019-01-22 | Oppo广东移动通信有限公司 | Wireless charger |
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