CN108666078A - A kind of integrated car Wireless charging coil - Google Patents
A kind of integrated car Wireless charging coil Download PDFInfo
- Publication number
- CN108666078A CN108666078A CN201810496911.6A CN201810496911A CN108666078A CN 108666078 A CN108666078 A CN 108666078A CN 201810496911 A CN201810496911 A CN 201810496911A CN 108666078 A CN108666078 A CN 108666078A
- Authority
- CN
- China
- Prior art keywords
- protective plate
- skeleton
- wireless charging
- coil
- placing groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 85
- 238000010276 construction Methods 0.000 abstract description 11
- 230000001012 protector Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 229960001866 silicon dioxide Drugs 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000037237 body shape Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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
Abstract
The invention discloses a kind of integrated car Wireless charging coils, including skeleton, the middle part of the skeleton is equipped with perforative straight slot, and the closed placing groove around straight slot setting is equipped in the skeleton, the coil along placing groove extending direction coiling is equipped in the placing groove；Further include the connecting seat of the first protective plate and the second protective plate and connection the first protective plate and the second protective plate, the connecting seat passes through the straight slot, the first protective plate to be located at the top of skeleton, and the second protective plate is located at the lower section of skeleton.The structure of integral type of the present invention can protect coil, promote the reliability and anti-pressure ability of coil, and facilitate construction.
Description
Technical field
The present invention relates to wireless charging technical field, especially a kind of integrated car Wireless charging coil.
Background technology
The wireless charging technology of electric vehicle is emerging in recent years charging technique, and current charging measure is by wireless charging
Electric coil is embedded in underground, using electromagnetic induction principle, is charged the battery by receiving coil.In Specific construction process
In, it needs to place charge coil in orbit, then be laid with for protecting coil in coil top in provided underground track in advance
Resistance to compression backplate, this mode of operation is easily damaged coil in construction work, and work progress is relatively complicated, difficulty of construction compared with
It is high.
Invention content
The present invention provides a kind of integrated car Wireless charging coil, and the structure of integral type can protect coil, is promoted
The reliability and anti-pressure ability of coil.
The present invention provides a kind of integrated car Wireless charging coil, including skeleton, and the middle part of the skeleton, which is equipped with, to be passed through
The straight slot worn, the skeleton is interior to be equipped with the closed placing groove for surrounding straight slot setting, and the placing groove is interior equipped with along placement
The coil of slot extending direction coiling；Further include the first protective plate and the second protective plate and the first protective plate of connection and the second protection
The connecting seat of plate, the connecting seat pass through the straight slot, the first protective plate to be located at the top of skeleton, and the second protective plate is located at skeleton
Lower section.
Preferably, the upper surface of first protective plate is equipped with drainage channel, and the drainage channel sequentially passes through described the
One protective plate, connecting seat and the second protective plate.
Preferably, first protective plate, connecting seat and the second protective plate are flase floor.
Preferably, the skeleton is located within the scope of the upright projection of the first protective plate and the second protective plate.
Preferably, third protective plate is socketed on the outside of the skeleton, the third protective plate is arranged around the skeleton.
Preferably, the third protective plate is equipped with perforative osculum.
Preferably, the third protective plate is flase floor.
Preferably, the height of the connecting seat is identical as the height of the skeleton.
Preferably, the connecting seat is fixed in the straight slot.
Preferably, magnetic core is equipped in the placing groove, the magnetic core is located at the lower section of the coil.
Preferably, the bottom of the placing groove is equipped with multiple protectors along placing groove extending direction, and the magnetic core setting exists
In the protector.
Preferably, the protective layer for fixed magnetic core is equipped between the protector and magnetic core.
Preferably, the protective layer is thermal grease or silicagel pad.
Preferably, the protection groove upper cap is covered with protection board, and the coil is arranged on protection board.
Preferably, in the placing groove, casting glue is filled in the top of protection board.
Preferably, the magnetic core is sequentially uniformly distributed one by one along the extending direction of placing groove.
Preferably, the bottom of the placing groove is equipped with the convex block of multiple protrusions, and the guarantor is formed between two neighboring convex block
Protecting groove.
Preferably, the skeleton is square ring structure.
In the present invention, coil is placed into closed placing groove, is implemented to protect to coil by skeleton, can be prevented coil
Damage, meanwhile, skeleton is socketed on connecting seat, and the first protective plate is located at the top of skeleton, and the second protective plate is located under skeleton
Side forms the safeguard structure of integral type, promotes the reliability and anti-pressure ability of Wireless charging coil itself.It, can be direct when construction
The automobile Wireless charging coil of the present invention is placed on preset track, no longer needs to install protection or pressure-resisting plate additional, greatly
It shortens the construction time and improves the convenience of maintenance.
Other advantageous effects will be described in detail in specific embodiment part possessed by of the invention.
Description of the drawings
Fig. 1 is the structural schematic diagram of the skeleton of an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the integrated car Wireless charging coil of an embodiment of the present invention.
Specific implementation mode
Below by specific implementation mode combination attached drawing, invention is further described in detail.
Before the integrated car to the present invention is illustrated with Wireless charging coil, it is necessary to institute of the embodiment of the present invention
The skeleton being related to carries out as described below：
It is made as shown in Figure 1, hard material can be used in skeleton 1, can be specifically steel plate, plastic plate etc., but from insulation
Angle considers, the hard material preferably to insulate, such as rigid plastics etc., using as support construction.It is set at the middle part of the skeleton 1
There is perforative straight slot 10 so that skeleton 1 forms the ring-like structure around straight slot 10.In the present embodiment, 1 appearance profile of skeleton
To be rectangular, straight slot 10 is also rectangular so that the generally square ring structure of skeleton 1.Certainly, according to actual needs, skeleton 1 also may be used
To be circular or regular polygon structure.
Be equipped with the placing groove 11 being arranged around the straight slot 10 in skeleton 1, placing groove 11 can in the shape of a spiral or other
Arbitrarily around the structure of shape, to surround the setting of straight slot 10.Coil (not illustrating coil in figure) is provided in placing groove 11, coil will
It is arranged around straight slot 10 along the extending direction of placing groove 11 so that coil has multiple cyclic structures, so as to generate magnetic
Intensity is felt, with conduct power.Stablize to make magnetic induction intensity caused by coil keep unified, placing groove 11 is set as head and the tail
Connected structure forms the endless groove of cycle connection, and the body shape of placing groove 11 can be with the body shape phase of skeleton 1
Match, the size and shape for allowing for every circle coil matches, and can generate the magnetic induction intensity of unified stabilization.Coil can not be with
The inner wall of placing groove 11 contacts, and can also be wound on the inner wall of placing groove 11.
Placing groove 11 is set as sealing structure, and when preventing construction, external object, which enters, damages coil in placing groove 11.
Specifically, placing groove 11 can be opened in the top of skeleton 1, after being put into coil, casting mass is filled in placing groove 11, with
Placing groove 11 is sealed.Certainly, since coil needs to be connected with power supply, the conducting wire being connected with coil is needed from placing groove 11
Sealing structure in draw, with the loading power on two conducting wires.
Similar to the structure setting of the prior art, magnetic core 2 is additionally provided with below coil, magnetic core 2 can increase the magnetic of coil
Sensibility reciprocal, intensified charging effect.
Further, multiple protectors 12, protection are equipped with along 11 extending direction of placing groove in the bottom of the placing groove 11
Slot 12 may extend over the slot bottom of entire placing groove 11, spaced apart between two neighboring protector 12.And the ruler of protector 12
It is very little to be slightly larger than magnetic core 2, magnetic core 2 to be arranged in protector 12.The protection for being exclusively used in placing magnetic core 2 is provided in placing groove 11
Slot 12 allows magnetic core 2 not squeezed by coil or Embedding Material, reduces suffered stress, it is ensured that export stable electricity
Pressure and electric current, can protect coil, can also extend the service life of rechargeable battery.
In one embodiment, the protective layer for fixed magnetic core 2, protection are equipped between the protector 12 and magnetic core 2
Layer prevents magnetic core 2 from arbitrarily sliding, at the same time it can also buffer 2 bottom of magnetic core and side for magnetic core 2 to be fixed in protector 12
Face pressure.
Specifically, the protective layer is thermal grease or silicagel pad, silica gel has good insulating properties, and can make line
Heat on circle and magnetic core 2 distributes as early as possible.
In one embodiment, 12 upper cover of the protector is covered with protection board 3, and the coil is arranged on protection board 3,
Retarder and magnetic core 2, it is ensured that coil is not direct to be contacted with magnetic core 2, to further prevent being expressed to magnetic core 2.Protection board 3 can be with
Capping protector 12 completely, so that Embedding Material will not be seeped into the surface of magnetic core 2.Protection board 3 can be and 11 shape of placing groove
The entire plate to match covers all protectors 12, with the structural strength that enhancing is whole.
Further, in the placing groove 11, it is filled with casting glue in the top of protection board 3, casting glue can be by coil, guarantor
Backplate 3 is firmly fixed together with skeleton 1, prevents the position of each component from arbitrarily changing, enhancing structure intensity.
On the basis of the above embodiments, magnetic core 2 is individually sequentially uniformly distributed along the extending direction of placing groove 11, ensures magnetic
Induction is throughout relatively uniform.Wherein, the bottom of the placing groove 11 is equipped with the convex block 13 of multiple protrusions, two neighboring convex
The protector 12 is formed between block 13.
Above to be of the invention to a kind of explanation of skeleton, the present embodiment on the basis of the above embodiments, provides one kind one
Body formula automobile Wireless charging coil comprising any one skeleton of above-described embodiment, as shown in Fig. 2, further including first anti-
Backplate 51 and the second protective plate 52 and the connecting seat 6 for connecting the first protective plate 51 and the second protective plate 52, the connecting seat 6 will
Across the straight slot 10 of skeleton 1 so that skeleton 1 is socketed on connecting seat 6, the first protective plate 51 then be located at skeleton 1 top, second
Protective plate 52 is then located at the lower section of skeleton 1.
Wherein, skeleton 1, the first protective plate 51 and the second protective plate 52 can be arranged in parallel each other, keep overall structure more flat
It is whole, facilitate construction in later period.Protective plate used in the prior art may be used in first protective plate 51 and the second protective plate 52, tool
Body may be used hard material and be made.According to the appearance profile of skeleton 1, the first protective plate 51 and the second protective plate 52 can be set
It is set to the square structure to match with skeleton 1.First protective plate 51, the second protective plate 52 and connecting seat 6 can be passed through in the later stage
The modes such as welding, stickup are fastened to each other, and can also be integrated structure.
As a result of the safeguard structure of this integral type, Wireless charging coil is not easy to be damaged, and can promote wireless charging
The reliability and anti-pressure ability of electric coil itself.When construction, directly the automobile Wireless charging coil of the present embodiment can be placed
Onto preset track, no longer needs to install protection or pressure-resisting plate additional, greatly shorten the construction time and improve maintenance
Convenience.
In one embodiment, the upper surface of first protective plate 51 is equipped with drainage channel, and the drainage channel is successively
Through first protective plate 51, connecting seat 6 and the second protective plate 52, the lower surface of the second protective plate 52 is extended to.By
It is embedded in underground in the automobile Wireless charging coil of the present embodiment, when there are ponding for underground, if Wireless charging coil is long-term
It impregnates in water, is likely to result in coil short, influence charging effect, or even cause dangerous.The draining of the present embodiment setting is logical
Ponding can be discharged from drainage channel for road, and the first protective plate 51 and the second protective plate 52 by the top and bottom of skeleton 1 with
Soil is isolated, and water can only be discharged from drainage channel, it is ensured that will not intake in skeleton 1, ensure the safe handling of Wireless charging coil.
Further, first protective plate 51, connecting seat 6 and the second protective plate 52 are flase floor, can specifically be adopted
It is made of other materials such as fiberglass, Teflon or wear-resistant plastics, the first protective plate 51, connecting seat 6 and the second protective plate 52
Multiple vertically communicated grid holes 100 are respectively formed, and grid hole 100 may extend over the first protective plate 51, connecting seat 6 and second protects
Plate 52 plays the role of Quick drainage with increasing water discharge capacity.
In one embodiment, the skeleton 1 is located at the upright projection of the first protective plate 51 and the second protective plate 52
In range, i.e., the area of the first protective plate 51 and the second protective plate 52 is all higher than the area of skeleton 1, skeleton 1 is completely covered
Upper and lower surface, it is ensured that skeleton 1 is fully protected.
In one embodiment, the outside of the skeleton 1 is socketed with third protective plate 53, and the third protective plate 53 surrounds
The skeleton 1 is arranged.There is perforative card slot, skeleton 1 to be fixed in card slot at third protective plate 53 middle part so that third is anti-
Backplate 53 is implemented to protect from the outside of skeleton 1 to skeleton 1, and Wireless charging coil is more difficult to be damaged, and nothing can be further promoted
The reliability and anti-pressure ability of micro USB electric coil itself.
Wherein, protective plate used in the prior art may be used in third protective plate 53, can have and the first protection
52 identical material of plate 51 and the second protective plate.And can according to the appearance profile of the first protective plate 51 and the second protective plate 52, if
It is set to such as the direction structure in figure, and size is identical as the first protective plate 51 and the second protective plate 52, keeps whole uniformity
And stability.
Further, the third protective plate 53 is equipped with vertical perforative osculum, and the ponding of 1 side of skeleton passes through row
Water hole is discharged, without in lateral flow to skeleton 1, playing further waterproof action, further ensureing Wireless charging coil
Safe handling.
Further, the third protective plate 53 is flase floor, and fiberglass, Teflon or wear-resisting specifically may be used
The other materials such as plastics are made, and form multiple vertically communicated grid holes 100 on third protective plate 53, and grid hole 100 can be all over
The surface of cloth third protective plate 53 Quick drainage is played the role of with increasing water discharge capacity.
On the basis of the above embodiments, the height of the connecting seat 6 of the present embodiment is identical as the height of the skeleton 1, then
The upper and lower surface that first protective plate 51 and the second protective plate 52 will be tightly attached to skeleton 1 respectively is prevented so that skeleton 1 is clamped
Movement of the skeleton 1 on vertical, the overall structure that makes is compacter, stablizes.
On the basis of the above embodiments, the connecting seat 6 of the present embodiment is fixed in the straight slot 10.Specifically,
The size of connecting seat 6 can be slightly larger than straight slot 10, connecting seat 6 to be clamped in straight slot 10 by micro elastic deformation, to
It limits skeleton 1 to move with respect to connecting seat 6 so that skeleton 1 and connect 6 and be stably fixed at and further enhance whole knot together
Structure intensity.
The above content is combining, specific embodiment is made for the present invention to be further described, and it cannot be said that this hair
Bright specific implementation is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made.
Claims (10)
1. a kind of integrated car Wireless charging coil, it is characterised in that：
Including skeleton, the middle part of the skeleton is equipped with perforative straight slot, is equipped in the skeleton around the close of straight slot setting
The placing groove closed, the interior coil being equipped with along placing groove extending direction coiling of the placing groove；Further include the first protective plate and second
Protective plate and the connecting seat for connecting the first protective plate and the second protective plate, the connecting seat pass through the straight slot, the first protection
Plate is located at the top of skeleton, and the second protective plate is located at the lower section of skeleton.
2. Wireless charging coil according to claim 1, it is characterised in that：
The upper surface of first protective plate is equipped with drainage channel, and the drainage channel sequentially passes through first protective plate, connects
Joint chair and the second protective plate.
3. Wireless charging coil according to claim 2, it is characterised in that：
First protective plate, connecting seat and the second protective plate are flase floor.
4. Wireless charging coil according to claim 1, it is characterised in that：
The skeleton is located within the scope of the upright projection of the first protective plate and the second protective plate.
5. according to claim 1-4 any one of them Wireless charging coils, it is characterised in that：
Third protective plate is socketed on the outside of the skeleton, the third protective plate is arranged around the skeleton.
6. Wireless charging coil according to claim 5, it is characterised in that：
The third protective plate is equipped with perforative osculum.
7. Wireless charging coil according to claim 6, it is characterised in that：
The third protective plate is flase floor.
8. according to claim 1-4 any one of them Wireless charging coils, it is characterised in that：
The height of the connecting seat is identical as the height of the skeleton.
9. according to claim 1-4 any one of them Wireless charging coils, it is characterised in that：
The connecting seat is fixed in the straight slot.
10. according to claim 1-4 any one of them Wireless charging coils, it is characterised in that：
Magnetic core is equipped in the placing groove, the magnetic core is located at the lower section of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496911.6A CN108666078A (en) | 2018-05-22 | 2018-05-22 | A kind of integrated car Wireless charging coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496911.6A CN108666078A (en) | 2018-05-22 | 2018-05-22 | A kind of integrated car Wireless charging coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108666078A true CN108666078A (en) | 2018-10-16 |
Family
ID=63777549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810496911.6A Pending CN108666078A (en) | 2018-05-22 | 2018-05-22 | A kind of integrated car Wireless charging coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108666078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113276514A (en) * | 2021-04-26 | 2021-08-20 | 昆山联友昌电子有限公司 | Flame-retardant protective film for wireless charging coil |
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|---|---|---|---|---|
| CN202997478U (en) * | 2012-12-10 | 2013-06-12 | 山西省电力公司检修分公司 | Transformer substation cable trench cover plate |
| CN205104926U (en) * | 2015-09-01 | 2016-03-23 | 中兴新能源汽车有限责任公司 | Wireless rechargeable receiver and electric automobile |
| US20170240057A1 (en) * | 2016-02-22 | 2017-08-24 | Ipt Technology Gmbh | Coil Unit of a Device for Inductive Transmission of Electrical Power |
| CN206775242U (en) * | 2017-06-13 | 2017-12-19 | 中惠创智无线供电技术有限公司 | Wireless charging transmitting, receive end structure |
| CN107627887A (en) * | 2017-09-27 | 2018-01-26 | 哈尔滨工业大学 | Magnetic coupling applied to wireless charging system for electric automobile |
| CN208548210U (en) * | 2018-05-22 | 2019-02-26 | 珠海拓锐德电子科技有限公司 | A kind of integrated car Wireless charging coil |
-
2018
- 2018-05-22 CN CN201810496911.6A patent/CN108666078A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202997478U (en) * | 2012-12-10 | 2013-06-12 | 山西省电力公司检修分公司 | Transformer substation cable trench cover plate |
| CN205104926U (en) * | 2015-09-01 | 2016-03-23 | 中兴新能源汽车有限责任公司 | Wireless rechargeable receiver and electric automobile |
| US20170240057A1 (en) * | 2016-02-22 | 2017-08-24 | Ipt Technology Gmbh | Coil Unit of a Device for Inductive Transmission of Electrical Power |
| CN206775242U (en) * | 2017-06-13 | 2017-12-19 | 中惠创智无线供电技术有限公司 | Wireless charging transmitting, receive end structure |
| CN107627887A (en) * | 2017-09-27 | 2018-01-26 | 哈尔滨工业大学 | Magnetic coupling applied to wireless charging system for electric automobile |
| CN208548210U (en) * | 2018-05-22 | 2019-02-26 | 珠海拓锐德电子科技有限公司 | A kind of integrated car Wireless charging coil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113276514A (en) * | 2021-04-26 | 2021-08-20 | 昆山联友昌电子有限公司 | Flame-retardant protective film for wireless charging coil |
| CN113276514B (en) * | 2021-04-26 | 2022-12-27 | 昆山联友昌电子有限公司 | Flame-retardant protective film for wireless charging coil |
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