CN110539658B - Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle - Google Patents
Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle Download PDFInfo
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- CN110539658B CN110539658B CN201910835407.9A CN201910835407A CN110539658B CN 110539658 B CN110539658 B CN 110539658B CN 201910835407 A CN201910835407 A CN 201910835407A CN 110539658 B CN110539658 B CN 110539658B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a wireless charging emitter compression-resistant device capable of realizing convection heat dissipation for an electric vehicle, which comprises a closed installation cavity made of a heat conduction material, and a pressure-bearing cavity positioned at the upper part of the installation cavity and covering the installation cavity; an inner core layer is arranged in the mounting cavity, the bottom layer of the pressure-bearing cavity is formed by the top layer of the mounting cavity, and a heat dissipation channel communicated with the pressure-bearing cavity and the outside is arranged on the side wall of the pressure-bearing cavity; the top surface of the mounting cavity is provided with a convex part for supporting the inner top surface of the pressure-bearing cavity, and the bottom surface of the mounting cavity is flush with the bottom surface of the side wall of the pressure-bearing cavity and is simultaneously supported on the ground. This device structural strength is high, heat dispersion is good.
Description
Technical Field
The invention relates to the field of wireless charging equipment, in particular to a wireless charging emitter compression-resistant device capable of achieving convection heat dissipation for an electric vehicle.
Background
The wireless charging transmitter housing is an important component in a wireless charging system, and the function of the wireless charging transmitter housing is to install and protect the internal coil and the chip circuit of the wireless charging transmitter. Currently, wireless charging transmitter devices that are more widely used are classified into a ground type and an underground type. The ground type shell device is mostly of an engineering plastic integral forming structure, the device is sealed, the engineering plastic has poor heat dissipation performance, heat generated by long-time work of a coil at a wireless charging transmitting end cannot be rapidly discharged, so that the internal temperature of the device is very high, the wireless charging transmitter is damaged, the service life is influenced, the bearing capacity of the engineering plastic is limited, external load is transmitted to the inner core of the wireless charging transmitter through the surface of the device, and the inner core of the wireless charging transmitter is easily damaged; the underground structure mainly pre-embeds the wireless charging transmitter under the floor, and the floor is provided with the compression-resistant panel to bear load.
Chinese document CN 209000734U discloses an integrated transmission wire coil based on wireless charging application of an electric vehicle, in the scheme, a sealed chamber is used for installing a coil, and a buffer layer is filled in the chamber, so that the coil has a large heat productivity during working for a long time, and in a sealed environment, the buffer layer is added, which makes heat dissipation more difficult and affects the service life of the product.
Chinese document CN 109017419 a discloses a pressure-resistant structure for a wireless charging transmitter, which mainly strengthens the structural strength by changing the frame structure, but does not consider the problem of heat dissipation; moreover, the pressure is concentrated on the bearing layer, and the bearing layer is subjected to overlarge pressure, so that the service life is easily shortened.
Disclosure of Invention
In view of the above, there is a need for a wireless charging transmitter pressure-resistant device with high structural strength and good heat dissipation performance for an electric vehicle capable of convectively dissipating heat.
In order to solve the technical problems, the technical scheme of the invention is as follows: a wireless charging emitter compression-resistant device capable of achieving convection heat dissipation for an electric vehicle comprises a closed installation cavity made of heat conducting materials and a pressure-bearing cavity located on the upper portion of the installation cavity and covering the installation cavity; an inner core layer is arranged in the mounting cavity, the bottom layer of the pressure-bearing cavity is formed by the top layer of the mounting cavity, and a heat dissipation channel communicated with the pressure-bearing cavity and the outside is arranged on the side wall of the pressure-bearing cavity; the top surface of the mounting cavity is provided with a convex part for supporting the inner top surface of the pressure-bearing cavity, and the bottom surface of the mounting cavity is flush with the bottom surface of the side wall of the pressure-bearing cavity and is simultaneously supported on the ground.
Furthermore, the top surface of the inner core layer is attached to the inner top surface of the installation cavity, and the bottom surface of the inner core layer is attached to the inner bottom surface of the installation cavity.
Furthermore, an annular first weight reduction groove is formed in the bottom of the side wall of the pressure bearing chamber, and a plurality of reinforcing ribs are arranged in the first weight reduction groove.
Further, the heat dissipation channel is communicated with the first weight reduction groove.
Further, the convex portion is an annular convex portion provided on the peripheral side of the top surface of the mounting chamber.
Further, the side wall of the pressure-bearing chamber is provided with heat dissipation holes, the convex portion is provided with heat dissipation grooves in butt joint with the heat dissipation holes, and the heat dissipation holes and the heat dissipation grooves form heat dissipation channels.
Furthermore, the heat dissipation channels are arranged on two opposite side walls of the pressure-bearing chamber, and the rest side walls are not provided with the heat dissipation channels.
Furthermore, the outer side wall of the pressure-bearing chamber is an inclined plane.
Furthermore, the installation chamber comprises a supporting layer and a sealing layer, a lower groove is formed in the bottom of the supporting layer, the sealing layer is embedded into the lower groove, the bottom surface of the sealing layer is flush with the bottom surface of the side wall of the lower groove, and the inner core layer is arranged in the lower groove.
Furthermore, the pressure-bearing chamber comprises an annular buffer outer frame covering the support layer and a bearing layer arranged at the top of the buffer outer frame, the support layer forms a bottom layer of the pressure-bearing chamber, and the bottom surface of the installation chamber is flush with the bottom surface of the side wall of the buffer outer frame.
Further, the bearing layer is made of toughened glass.
Furthermore, the outer side wall of the buffering outer frame is an inclined plane.
Compared with the prior art, the invention has the following beneficial effects:
1. this device encapsulates the protection to the inner core layer through one adopts heat conduction material preparation and inclosed installation cavity, gives pressure-bearing chamber and ground with the heat conduction simultaneously, and radiating channel and intercommunication pressure-bearing chamber and outside air strengthen the radiating efficiency.
2. This device supports the bearer layer simultaneously through buffering frame and supporting layer, and structural strength is high, and the pressure that the bearer layer bore is shared by buffering frame and supporting layer, disperses pressure, improves the life of product.
3. This device is applicable to as the shell of the wireless transmitter that charges of ground type, can be in electric automobile's wheel roll fine protection inner core layer down, wireless transmitter inner coil and the chip circuit that charges promptly.
4. Through the cooperation of the pressure-bearing chamber and the heat dissipation channel, the working temperature of the device is 16 ℃ lower than that of a shell without a heat dissipation design.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of a top surface according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a bottom surface according to an embodiment of the present invention.
Fig. 3 is an exploded view of an embodiment of the present invention.
Fig. 4 is a cross-sectional view of an embodiment of the present invention.
In the figure: 1-bearing layer, 2-buffer outer frame, 21-heat dissipation holes, 22-first concave part, 23-first lightening groove, 24-reinforcing rib, 3-supporting layer, 31-heat dissipation groove, 32-annular convex part, 33-second lightening groove, 4-inner core layer, 5-sealing layer and 51-placing groove.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 to 4, a wireless charging emitter compression-resistant device capable of dissipating heat convectively for an electric vehicle comprises a mounting chamber made of a heat-conducting material and sealed, and a pressure-bearing chamber located at the upper part of the mounting chamber and covering the mounting chamber; the installation cavity includes supporting layer 3 and sealing layer 5, and 3 bottoms of supporting layer are provided with the low groove, and the embedding of sealing layer 5 is in the low groove, and the bottom surface of sealing layer 5 and the bottom surface looks parallel and level of low groove lateral wall, and 5 upper portions of sealing layer are provided with standing groove 51, and interior sandwich layer 4 sets up in the low groove, and the top surface is laminated mutually in 4 top surfaces of interior sandwich layer and the low groove, and the bottom surface is laminated mutually in 4 bottom surfaces of interior sandwich layer and standing groove 51. The pressure-bearing chamber is including the cyclic annular buffering frame 2 that covers supporting layer 3, the setting is at the bearer layer 1 at buffering frame 2 top, supporting layer 4 constitutes the bottom of pressure-bearing chamber, 3 top surface week sides of supporting layer are provided with the annular convex part 32 that is used for supporting the bearer layer bottom surface, 2 inside wall tops of buffering frame are provided with annular first concave part 22, bearer layer 1 is placed on first concave part 22, bearer layer 1 upper surface and 2 top surface parallel and level of buffering frame, convex part 32 top surface and first concave part 22 bottom surface parallel and level, the bottom surface and the 3 low groove lateral wall bottom surfaces of supporting layer of buffering frame 2 lateral walls support in subaerial simultaneously.
In this embodiment, the bearing layer 1 is made of tempered glass.
In this embodiment, the bottom of the side wall 2 of the buffering outer frame is provided with an annular first weight-reducing groove 23, the first weight-reducing groove 23 is provided with a plurality of reinforcing ribs 24, the side wall of the buffering outer frame 2 is provided with heat dissipation holes 21, the convex portion 32 is provided with heat dissipation grooves 31 butted with the heat dissipation holes 21, the heat dissipation holes 21 and the heat dissipation grooves 31 form a heat dissipation channel, and the heat dissipation holes 21 are communicated with the first weight-reducing groove 23, so that the heat dissipation effect is enhanced.
In this embodiment, a slot and an insert block which are engaged with each other are arranged between the supporting layer 3 and the sealing layer 5, and a rubber strip is added in a gap between the slot and the insert block, so that waterproof and dustproof effects can be achieved. Of course, the sealing layer can also be welded to the support layer by means of welding.
In this embodiment, the outer sidewall of the buffer outer frame 2 is a slope. The impact buffer is used for buffering the impact of daily tire rolling.
In this embodiment, the heat dissipation channels are disposed on two opposite side walls of the pressure-bearing chamber, and the remaining side walls are not provided with the heat dissipation channels. The side wall without the heat dissipation channel is arranged towards the driving direction of the automobile, so that the side wall with the heat dissipation channel is prevented from being directly rolled by the wheels.
In this embodiment, the bottom of the outer sidewall of the support layer 3 is provided with a second lightening groove 33.
In this embodiment, a gap is left between the buffer outer frame 2 and the supporting layer 3, so that rainwater enters the pressure-bearing chamber along the heat dissipation channel, and the rainwater can flow out along the gap.
In this embodiment, inner core layer 4 laminates as wireless transmitter inner coil and chip circuit that charges, and its top surface laminates mutually with the interior top surface of low groove, and the bottom surface laminates mutually in bottom surface and the standing groove, can be abundant transmit the heat for pressure-bearing cavity and ground respectively through the installation cavity, through ground and radiating channel with the heat transfer, the radiating efficiency of this device of effectual improvement to play very good safeguard effect to inner core layer.
Although the present invention has been described with reference to the preferred embodiments, it should be understood 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 (7)
1. The utility model provides a but be used for electric vehicle convection current heat dissipation's wireless transmitter resistance to compression device that charges which characterized in that: the device comprises a closed installation cavity made of heat conducting materials and a pressure-bearing cavity which is positioned at the upper part of the installation cavity and covers the installation cavity; an inner core layer is arranged in the mounting cavity, the bottom layer of the pressure-bearing cavity is formed by the top layer of the mounting cavity, and a heat dissipation channel communicated with the pressure-bearing cavity and the outside is arranged on the side wall of the pressure-bearing cavity; the top surface of the mounting cavity is provided with a convex part for supporting the inner top surface of the pressure-bearing cavity, and the bottom surface of the mounting cavity is flush with the bottom surface of the side wall of the pressure-bearing cavity and is simultaneously supported on the ground;
the mounting chamber comprises a supporting layer and a sealing layer, a lower groove is formed in the bottom of the supporting layer, the sealing layer is embedded in the lower groove, the bottom surface of the sealing layer is flush with the bottom surface of the side wall of the lower groove, and the inner core layer is arranged in the lower groove;
the pressure-bearing chamber comprises an annular buffer outer frame covering a support layer and a bearing layer arranged at the top of the buffer outer frame, the support layer forms the bottom layer of the pressure-bearing chamber, and the bottom surface of the installation chamber is flush with the bottom surface of the side wall of the buffer outer frame;
a spacing space is arranged between the bearing layer and the supporting layer;
the side wall of the pressure-bearing cavity is provided with heat dissipation holes, the convex part is provided with heat dissipation grooves in butt joint with the heat dissipation holes, and the heat dissipation holes and the heat dissipation grooves form heat dissipation channels.
2. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 1, wherein: the top surface of interior sandwich layer and the interior top surface of installation cavity are laminated mutually, the bottom surface of interior sandwich layer and the interior bottom surface of installation cavity are laminated mutually.
3. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 1, wherein: and the bottom of the side wall of the pressure-bearing chamber is provided with an annular first weight-reducing groove.
4. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 3, wherein: the heat dissipation channel is communicated with the first weight reduction groove.
5. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 1, wherein: the convex part is an annular convex part arranged on the periphery side of the top surface of the mounting chamber.
6. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 1, wherein: the heat dissipation channels are arranged on two opposite side walls of the pressure-bearing chamber, and the rest side walls are not provided with the heat dissipation channels.
7. The wireless charging transmitter compression resistant device for convectively dissipating heat for electric vehicles of claim 1, wherein: the outer side wall of the pressure-bearing chamber is an inclined plane.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835407.9A CN110539658B (en) | 2019-09-05 | 2019-09-05 | Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle |
| PCT/CN2019/126603 WO2021042627A1 (en) | 2019-09-05 | 2019-12-19 | Wireless charging transmitter compression-resistant device capable of convection heat dissipation for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835407.9A CN110539658B (en) | 2019-09-05 | 2019-09-05 | Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110539658A CN110539658A (en) | 2019-12-06 |
| CN110539658B true CN110539658B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910835407.9A Active CN110539658B (en) | 2019-09-05 | 2019-09-05 | Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110539658B (en) |
| WO (1) | WO2021042627A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110539658B (en) * | 2019-09-05 | 2021-06-25 | 厦门理工学院 | Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6480256B2 (en) * | 2015-05-15 | 2019-03-06 | 矢崎総業株式会社 | Fixing structure and coil unit |
| CN110226209B (en) * | 2017-06-22 | 2022-04-15 | 株式会社Ihi | Coil device |
| CN207235347U (en) * | 2017-11-22 | 2018-04-13 | 深圳市蓝禾技术有限公司 | Wireless charger |
| CN207166198U (en) * | 2017-11-23 | 2018-03-30 | 深圳市蓝禾技术有限公司 | Wireless charger |
| DE102018200252A1 (en) * | 2018-01-10 | 2019-07-11 | Audi Ag | Inductive charging arrangement for a vehicle accumulator |
| CN208835779U (en) * | 2018-08-22 | 2019-05-07 | 深圳市一讯达科技有限公司 | A kind of wireless charging shell structure and wireless charging device |
| CN109017419B (en) * | 2018-08-31 | 2024-02-20 | 厦门理工学院 | Compression-resistant structure for wireless charging transmitter |
| CN208896887U (en) * | 2018-08-31 | 2019-05-24 | 厦门理工学院 | A kind of compression-resistant structure for wireless charging transmitter |
| CN208914978U (en) * | 2018-09-03 | 2019-05-31 | 广西电网有限责任公司电力科学研究院 | Anti-pressure wireless charging emitter |
| CN209000734U (en) * | 2018-11-22 | 2019-06-18 | 厦门新页科技有限公司 | A kind of integral type transmitting drum based on the application of electric car wireless charging |
| CN110539658B (en) * | 2019-09-05 | 2021-06-25 | 厦门理工学院 | Wireless charging emitter compression resistance device capable of achieving convection heat dissipation for electric vehicle |
-
2019
- 2019-09-05 CN CN201910835407.9A patent/CN110539658B/en active Active
- 2019-12-19 WO PCT/CN2019/126603 patent/WO2021042627A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN110539658A (en) | 2019-12-06 |
| WO2021042627A1 (en) | 2021-03-11 |
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