WO2019100708A1 - 无线充电器 - Google Patents

无线充电器 Download PDF

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Publication number
WO2019100708A1
WO2019100708A1 PCT/CN2018/092152 CN2018092152W WO2019100708A1 WO 2019100708 A1 WO2019100708 A1 WO 2019100708A1 CN 2018092152 W CN2018092152 W CN 2018092152W WO 2019100708 A1 WO2019100708 A1 WO 2019100708A1
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WO
WIPO (PCT)
Prior art keywords
bottom cover
circuit board
wireless charger
heat
disposed
Prior art date
Application number
PCT/CN2018/092152
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English (en)
French (fr)
Inventor
桑堇馨
Original Assignee
深圳市蓝禾技术有限公司
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Publication of WO2019100708A1 publication Critical patent/WO2019100708A1/zh

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Classifications

    • 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
    • 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

Definitions

  • the utility model relates to the field of radio technology, in particular to a wireless charger.
  • the wireless charger transmits power by using a magnetic field generated between the coils, avoiding the use of a charging power cord, and is convenient to use.
  • Electronic devices such as mobile phones will heat up during the charging process, and currently the wireless chargers on the market have almost no heat dissipating components, or only the metal backplane is used for heat dissipation, resulting in poor heat dissipation. Therefore, the accumulation of heat that cannot be dissipated in time easily leads to an increase in the temperature of the device itself, affecting the work efficiency and safety of the electronic device and the wireless charger.
  • a wireless charger comprising a top cover, a bottom cover and a wireless charging module disposed between the top cover and the bottom cover, wherein the wireless charging module comprises a circuit board and a coil, The coils are placed on the circuit board or laterally side by side, and a heat conducting element is disposed between the circuit board and the bottom cover, the heat conducting element comprising a metal substrate and a heat conductive film.
  • the metal substrate has an upper surface facing the top cover and a lower surface facing the bottom cover, and the heat conductive film is disposed on an upper surface or a lower surface of the metal substrate.
  • the heat conductive film is a nano heat conductive film or a non-nano heat conductive film
  • the nano heat conductive film includes one or a combination of a carbon nanotube film, a graphene film, a carbon fiber film, and a nano paint film.
  • the carbon nanotube film includes a plurality of vertically aligned carbon nanotube arrays that are in direct contact with the circuit board.
  • the carbon nanotube film further includes a heat conductive substrate covering each of the carbon nanotubes.
  • the thermally conductive substrate is a polymer material, including one or a combination of a silica gel series, a polyethylene glycol, a polyester, an epoxy resin series, an anoxic glue series or an acrylic glue series.
  • the bottom cover extends toward the sidewall of the wireless charging module, and the sidewall is provided with a heat dissipation hole.
  • the inner surface of the bottom cover is coated with a heat-dissipating paint.
  • the metal substrate of the heat conductive element is directly disposed on the inner surface of the bottom cover.
  • the wireless charger provided by the present invention is provided with a heat-conducting component, which can conduct heat from the wireless charging module and the circuit board to the bottom cover, thereby being radiated to the outside to avoid heat accumulation. Causes the temperature to rise.
  • the wireless charger of the utility model has good heat dissipation effect, high work efficiency, safety and stability.
  • FIG. 1 is a schematic structural diagram of a wireless charger according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view 1 of the heat conducting element shown in FIG. 1.
  • FIG. 3 is a schematic structural view 2 of the heat conducting element shown in FIG. 1.
  • FIG. 4 is a schematic structural view of the bottom cover shown in FIG. 1.
  • Wireless charger 100 Top cover 10
  • Bottom cover 20 Vents twenty one Wireless charging module 30
  • Circuit board 31 Coil 32
  • Thermal element 40 Metal substrate 41
  • Thermal film 42 Carbon nanotube 421 Thermal substrate 422
  • the wireless charger 100 in one embodiment of the present invention is a wireless charging device that transmits electric energy through a magnetic field generated by a coil, such as a mobile phone charger, etc., and its function is to avoid using a charging power line, and is convenient to use.
  • the wireless charger 100 includes a top cover 10, a bottom cover 20, and a wireless charging module 30 disposed between the top cover 10 and the bottom cover 20.
  • the wireless charging module 30 includes a circuit board 31 and a coil 32.
  • the coils 32 are placed above the circuit board 31 or laterally side by side, and a heat conducting element 40 is disposed between the circuit board 31 and the bottom cover 20, the heat conducting element 40 including a metal substrate 41 and a heat conductive film 42.
  • the heat conducting element 40 is used to transfer heat to dissipate it in time.
  • the top cover 10 is an outer cover of the wireless charging module 30 , and is combined with the bottom cover 20 to form a closed casing.
  • the top cover 10 has a disk shape and is disposed on the top cover 10 .
  • the top of the wireless charger 100 is an outer cover of the wireless charging module 30 , and is combined with the bottom cover 20 to form a closed casing.
  • the top cover 10 has a disk shape and is disposed on the top cover 10 .
  • the top of the wireless charger 100 is an outer cover of the wireless charging module 30 , and is combined with the bottom cover 20 to form a closed casing.
  • the top cover 10 has a disk shape and is disposed on the top cover 10 .
  • the top of the wireless charger 100 is an outer cover of the wireless charging module 30 , and is combined with the bottom cover 20 to form a closed casing.
  • the wireless charging module 30 includes a circuit board 31 and a coil 32 disposed on the circuit board 31.
  • the key working component for wireless charging is mainly an electromagnetic induction principle, and energy coupling is performed through the coil 32.
  • the coil 32 and the circuit board 31 are in the shape of a disk, and the coil 32 is fixed to a central position on the circuit board 31.
  • a magnetic conductive sheet is disposed between the coil 32 and the circuit board 31.
  • the bottom surface of the circuit board 31 is provided with electronic components for transferring heat under the circuit board 31 while transmitting magnetic lines of force toward the coil 32.
  • the coils 32 may be disposed laterally side by side with the circuit board 31.
  • the heat conducting component 40 is disposed between the circuit board 31 and the bottom cover 20 .
  • the heat conducting component 40 has a circular cross section and includes a metal substrate 41 and a heat conductive film 42 .
  • the metal substrate 41 is directly disposed on the inner surface of the bottom cover 20.
  • the metal substrate 41 has an upper surface facing the top cover 10 and a lower surface facing the bottom cover 20, and the heat conductive film 42 is disposed on an upper surface of the metal substrate 41.
  • the heat conductive film 42 is a carbon nanotube film, and includes a plurality of arrays of vertically aligned carbon nanotubes 421 , and the array of carbon nanotubes 421 is in direct contact with the circuit board 31 .
  • the heat generated by the circuit board 31 is sequentially transmitted to the bottom cover 20 via the carbon nanotubes 421 and the metal substrate 41, and then emitted.
  • the heat conductive film 42 further includes a heat conductive substrate 422 of an epoxy resin series, and the heat conductive substrate 422 covers each of the carbon nanotubes 421.
  • the heat conducting component 40 is disposed between the circuit board 31 and the bottom cover 20, and the heat conducting component 40 has a circular cross section, and includes a metal substrate 41 and a heat conductive film 42.
  • the metal substrate 41 has an upper surface facing the top cover 10 and a lower surface facing the bottom cover 20, and the heat conductive film 42 is disposed on a lower surface of the metal substrate 41.
  • the heat conductive film 42 is a carbon nanotube film, and includes a plurality of arrays of vertically aligned carbon nanotubes 421, the array of carbon nanotubes 421 is in direct contact with the bottom cover 20, the metal substrate 41 and the circuit board 31 direct contact.
  • the heat generated by the circuit board 31 is sequentially transmitted to the bottom cover 20 via the metal substrate 41 and the carbon nanotubes 421, and then emitted.
  • the heat conductive element 40 may have other shapes in cross section; the heat conductive substrate 422 may include a silicone series, a polyethylene glycol, a polyester, an epoxy series, an anoxic glue series, or a press. One or a combination of the series of adhesives.
  • the heat conductive film 42 may also be a nano heat conductive film of a carbon nanotube, a graphene film, a carbon fiber film, a nano coating film, or a combination thereof, or a non-nano heat conductive film such as a graphite sheet or the like.
  • the bottom cover 20 is in the shape of a hollow disk.
  • the bottom cover 20 extends toward the sidewall of the wireless charging module 30 , and the sidewall is provided with a heat dissipation hole. 21, the number is four, and the ring is symmetrically distributed.
  • the heat dissipation holes 21 may be randomly distributed; the heat dissipation holes 21 may also be formed on the bottom surface of the bottom cover 20; the inner surface of the bottom cover 20 may be coated with a heat dissipation coating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本实用新型提供一种无线充电器，包括顶盖，底盖以及设置于顶盖和底盖之间的无线充电模组，所述无线充电模组包括电路板和线圈，所述线圈置于所述电路板上或横向并排设置，在所述电路板和所述底盖之间设有导热元件。所述导热元件可以将无线充电模组和电路板上的热量传导到所述底盖，从而散出到外界，避免热量聚集而致温度升高。本实用新型的无线充电器的散热效果好，工作效率高，安全稳定。

Description

无线充电器 技术领域
本实用新型涉及无线电技术领域，特别是指无线充电器。
 背景技术
无线充电器通过使用线圈之间产生的磁场传输电能，避免使用充电电源线，使用便捷。电子设备如手机等在充电过程都会发热，而目前市场上的无线充电器几乎未设置任何散热元件，或仅采用金属底板散热，导致其散热效果差。因此无法及时散发的热量积聚易导致设备自身的温度升高，影响电子设备和无线充电器的工作效率和安全性。
 技术问题
鉴于以上内容，有必要提供一种改进的无线充电器，其具有快速散热、工作效率高、安全稳定的特点。
 技术解决方案
本实用新型提供的技术方案为：一种无线充电器，包括顶盖，底盖以及设置于顶盖和底盖之间的无线充电模组，所述无线充电模组包括电路板和线圈，所述线圈置于所述电路板上或横向并排设置，在所述电路板和所述底盖之间设有导热元件，所述导热元件包括金属基底以及导热膜。
进一步地，所述金属基底具有朝向所述顶盖的上表面和朝向所述底盖的下表面，所述导热膜设置在所述金属基底的上表面或下表面。
进一步地，所述导热膜为纳米导热膜或非纳米导热膜，所述纳米导热膜包括碳纳米管膜、石墨烯膜、碳纤维膜、纳米涂料膜中的一种或组合。
进一步地，所述碳纳米管膜包括多个竖向排列的碳纳米管阵列，所述碳纳米管阵列与所述电路板直接接触。
进一步地，所述碳纳米管膜还包括导热基材，所述导热基材包覆每一碳纳米管。
进一步地，所述导热基材为聚合物材料，包括硅胶系列、聚乙烯乙二醇、聚酯、环氧树脂系列、缺氧胶系列或压克力胶系列中一种或组合。
进一步地，所述底盖朝向所述无线充电模组的方向延伸出侧壁，所述侧壁上开设有散热孔。
进一步地，所述底盖的内表面涂覆有散热涂料。
进一步地，所述导热元件的金属基底直接设置在所述底盖的内表面。
 有益效果
与现有技术相比，本实用新型提供的无线充电器设有导热元件，所述导热元件可以将无线充电模组和电路板上的热量传导到底盖，从而散出到外界，避免热量聚集而致温度升高。本实用新型的无线充电器的散热效果好，工作效率高，安全稳定。
 附图说明
下面结合附图和具体实施方式对本实用新型作进一步详细的说明。
图1是本实用新型一实施例提供的无线充电器的结构示意图。
图2是图1所示导热元件的结构示意图一。
图3是图1所示导热元件的结构示意图二。
图4是图1所示底盖的一结构示意图。
 
附图标记说明:
无线充电器 100
顶盖 10
底盖 20
散热孔 21
无线充电模组 30
电路板 31
线圈 32
导热元件 40
金属基底 41
导热膜 42
碳纳米管 421
导热基材 422
如下具体实施方式将结合上述附图进一步说明本实用新型实施例。
 本发明的实施方式
为了能够更清楚地理解本实用新型实施例的上述目的、特征和优点，下面结合附图和具体实施方式对本实用新型进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本实用新型实施例，所描述的实施方式仅是本实用新型一部分实施方式，而不是全部的实施方式。基于本实用新型中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本实用新型实施例保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本实用新型实施例的技术领域的技术人员通常理解的含义相同。本文中在本实用新型的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本实用新型实施例。
本实用新型一实施例中的无线充电器100为通过线圈产生的磁场传输电能的无线充电设备，例如手机充电器等，其作用在于避免使用充电电源线，使用便捷。所述无线充电器100包括顶盖10，底盖20以及设置于顶盖10和底盖20之间的无线充电模组30，所述无线充电模组30包括电路板31和线圈32，所述线圈32置于所述电路板31上方或横向并排设置，在所述电路板31和所述底盖20之间设有导热元件40，所述导热元件40包括金属基底41以及导热膜42。所述导热元件40用于传递热量将其及时散发出去。
请参阅图1，所述顶盖10为所述无线充电模组30的外护件，与所述底盖20结合形成闭合的壳体，所述顶盖10为圆盘形，设于所述无线充电器100的顶部。
请参阅图1，所述无线充电模组30包括电路板31以及设置于电路板31上的线圈32，为实现无线充电的关键工作部件，主要采用电磁感应原理，通过所述线圈32进行能量耦合实现能量传递，所述线圈32和所述电路板31为圆盘形，所述线圈32固定于所述电路板31上的中心位置。所述线圈32和所述电路板31之间设有导磁片。所述电路板31的底面上设有电子元件，用于将热量传递至所述电路板31下方，同时将磁力线朝向所述线圈32方向传输。
在其他实施例中，所述线圈32可以与所述电路板31横向并排设置。
请一并参阅图1和图2，所述导热元件40设于所述电路板31和所述底盖20之间，所述导热元件40截面为圆形，包括金属基底41和导热膜42，所述金属基底41直接设置在所述底盖20的内表面。所述金属基底41具有朝向所述顶盖10的上表面和朝向所述底盖20的下表面，所述导热膜42设置在所述金属基底41的上表面。所述导热膜42为碳纳米管膜，包括多个竖向排列的碳纳米管421阵列，所述碳纳米管421阵列与所述电路板31直接接触。所述电路板31产生的热量依次经所述碳纳米管421和所述金属基底41传递至所述底盖20，继而散发出去。所述导热膜42还包括环氧树脂系列的导热基材422，所述导热基材422包覆每一所述碳纳米管421。
请一并参阅图1和图3，所述导热元件40设于所述电路板31和所述底盖20之间，所述导热元件40截面为圆形，包括金属基底41和导热膜42，所述金属基底41具有朝向所述顶盖10的上表面和朝向所述底盖20的下表面，所述导热膜42设置在所述金属基底41的下表面。所述导热膜42为碳纳米管膜，包括多个竖向排列的碳纳米管421阵列，所述碳纳米管421阵列与所述底盖20直接接触，所述金属基底41与所述电路板31直接接触。所述电路板31产生的热量依次经所述金属基底41、所述碳纳米管421传递至所述底盖20，继而散发出去。
在其他实施例中，所述导热元件40截面可以为其他形状；所述导热基材422可以为包括硅胶系列、聚乙烯乙二醇、聚酯、环氧树脂系列、缺氧胶系列或压克力胶系列中一种或组合。所述导热膜42还可以为碳纳米管、石墨烯膜、碳纤维膜、纳米涂料膜一种或组合的纳米导热膜，或者是非纳米导热膜，如石墨片等。
请一并参阅图1和图4，所述底盖20为中空圆盘形，所述底盖20朝向所述无线充电模组30的方向延伸出侧壁，所述侧壁上开设有散热孔21，数量为4个，环向对称分布。
在其他实施例中，所述散热孔21可随机分布；所述底盖20的底面上也可以开设所述散热孔21；所述底盖20的内表面可涂覆有散热涂料。
以上实施方式仅用以说明本实用新型实施例的技术方案而非限制，尽管参照以上较佳实施方式对本实用新型实施例进行了详细说明，本领域的普通技术人员应当理解，可以对本实用新型实施例的技术方案进行修改或等同替换都不应脱离本实用新型实施例的技术方案的精神和范围。

Claims (8)

  1. 一种无线充电器，包括顶盖，底盖以及设置于顶盖和底盖之间的无线充电模组，所述无线充电模组包括电路板和线圈，所述线圈置于所述电路板上或横向并排设置，其特征在于：在所述电路板和所述底盖之间设有导热元件，所述导热元件包括金属基底以及导热膜。
  2. 根据权利要求1所述的无线充电器，其特征在于：所述金属基底具有朝向所述顶盖的上表面和朝向所述底盖的下表面，所述导热膜设置在所述金属基底的上表面或下表面。
  3. 根据权利要求1所述的无线充电器，其特征在于：所述导热膜为碳纳米管膜，所述碳纳米管膜为包括多个竖向排列的碳纳米管阵列，所述碳纳米管阵列与所述电路板直接接触。
  4. 根据权利要求1所述的无线充电器，其特征在于：所述导热膜为石墨片。
  5. 根据权利要求3所述的无线充电器，其特征在于：所述碳纳米管膜还包括导热基材，所述导热基材包覆每一碳纳米管。
  6. 根据权利要求1所述的无线充电器，其特征在于：所述底盖朝向所述无线充电模组的方向延伸出侧壁，所述侧壁上开设有散热孔。
  7. 根据权利要求1所述的无线充电器，其特征在于：所述底盖的内表面涂覆有散热涂料。
  8. 根据权利要求1所述的无线充电器，其特征在于：所述导热元件的金属基底直接设置在所述底盖的内表面。
PCT/CN2018/092152 2017-11-22 2018-06-21 无线充电器 WO2019100708A1 (zh)

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CN207235347U (zh) * 2017-11-22 2018-04-13 深圳市蓝禾技术有限公司 无线充电器
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