CN102983636A - 使用多天线进行无线电力传输的设备及其控制方法 - Google Patents

使用多天线进行无线电力传输的设备及其控制方法 Download PDF

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CN102983636A
CN102983636A CN2012103236106A CN201210323610A CN102983636A CN 102983636 A CN102983636 A CN 102983636A CN 2012103236106 A CN2012103236106 A CN 2012103236106A CN 201210323610 A CN201210323610 A CN 201210323610A CN 102983636 A CN102983636 A CN 102983636A
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wireless power
charged
electric power
power transmission
signal
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CN102983636B (zh
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李智炯
朴来赫
朴云圭
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LS Cable and Systems Ltd
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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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

本发明提供一种无线电力传输设备，包括：至少一个电力传输天线，用于通过使用彼此间具有不同带宽的谐振频率以磁谐振的方式传输无线电力信号；无线电力信号生成模块，用于生成所述无线电力信号；至少一个无线电力转换模块，用于对由所述无线电力信号生成模块生成的所述无线电力信号的电力电平进行转换，且具有与所述电力传输天线的谐振频率的带宽相对应且彼此不同的电力电平转换范围；复用器匹配模块，用于选择性地将所述无线电力转换模块连接至对应的电力传输天线；以及控制单元，用于根据待充电装置的需求电力选择性地连接所述电力传输天线和所述无线电力转换模块，以调整所述无线电力信号的电力电平。

Description

使用多天线进行无线电力传输的设备及其控制方法
相关申请的交叉引用
本申请要求于2011年9月5日在韩国提交的第10-2011-0089752号韩国专利申请的优先权，其全部内容通过援引合并于此处。
技术领域
本申请涉及一种用于无线电力传输的设备，其用来以无线方式将电力传输至便携电子装置或小型家用电器以供充电或操作这些装置，尤其涉及这样一种无线电力传输设备，其中负责电力传输的天线被配置为多天线（multiantenna），以针对需要充电的各种装置来优化电力传输效率。
背景技术
相关技术说明
为了提高用户使用的便利性，诸如移动通信终端、PDA、PMP和笔记本等便携电子装置通常都使用可充电蓄电池。通过使用这样的电池作为驱动电源，用户可摆脱有线电源的束缚从而更加便利地使用各种产品。
电池通过来自外部电源的充电来储存能量，并且为了对电池充电，通常要使用单独的有线充电装置将家用电力提供作为该电池可使用的额定输出（rated power）。
通常，在有线充电方法中，充电装置的端子物理地接触电池的端子以进行电性连接。
然而，由于上述方法中是通过物理接触来获得电性耦接，所以这种连接的可靠性会随着物理磨损而恶化。此外，由于接触端子常常暴露在外，接触状态会由于杂质所导致的污染而变差。另外，在潮湿或湿气重的环境中，诸如电性短路等问题会发生或会容易失去所充能量。
为了解决接触型充电方法的问题，揭示了一种非接触式充电系统，其中充电端子并不物理地接触电池的端子。这种非接触式充电方法利用了这样一种本领域所公知的现象，即，如果初级线圈中磁场的磁通量根据时间而变化，则与初级线圈相邻的次级线圈中会由于根据时间变化的磁场感生出电力。
图1为示出利用感生电动势的非接触式充电装置和电池的一般示意图。
参见图1，一般的非接触式充电装置10包括：高频电力生成单元30，用于从交流（AC）电源20处接收电力并输出高频AC电流；以及初级线圈40，用于从所述高频电力生成单元30处接收所述高频AC电流并形成磁场M。
此外，电池50包括：电池单元60，利用电能进行充电；次级线圈70，根据初级线圈40处所产生的磁场M的联系在该次级线圈70中感生出高频AC电流；整流器80，用于将次级线圈70中感生出的高频AC电流转换成DC电流；以及恒压/恒流供应单元90，用于向电池单元60施加经过整流器80整流的DC电流。这里，所述的恒压/恒流供应单元90是一种广泛用于电池充电装置的电路元件。恒压/恒流供应单元90在初始充电阶段向电池单元60供应恒定电流，且如果电池单元60的充电电压逐渐上升并超过特定参考值，恒压/恒流供应单元90维持电压恒定，并代以降低所供应的电流，直到电池单元60达到完全充电状态。
一般的非接触式充电装置10是这样配置的，即，提供包括用于产生感生电动势的初级线圈40的无线基座，并将具有对应于初级线圈40的次级线圈70的电池50置于该无线基座上。然而，在这一配置中，用于产生感生电动势的线圈应具有平面形状，且在电力传输侧与电力接收侧之间具有方向性。因此，其对于应被充电的电池50的选择有所限制。出于这一原因，充电效率会取决于待充电电池50的位置而变化。
此外，在有数个装置需要进行充电的场合，一般的非接触式充电装置10会额外包括用于传输适于数个装置的电力的电力转换模块，且该电力转换模块根据诸如时分控制算法等控制算法来向数个装置供应电力。然而，尽管电力可能会被传输到需要相同电力的数个装置，但为了对需要不同电力的数个装置进行充电，就要考虑复杂的控制算法。出于这一原因，电力有不必要的浪费，这恶化了电力传输效率。另外，在电力转换模块被设计成具有宽的电力转换范围时，该电力转换模块的效率有所恶化。
发明内容
本申请被设计用来解决现有技术的这些问题，因此本申请的目的在于提供一种使用多天线进行无线电力传输的设备，其通过将负责无线电力传输的天线配置为多天线而可针对各种待充电装置优化电力传输效率。本申请的目的还在于提供一种用于控制上述无线电力传输设备的方法。
在一个方面，本申请提供一种用于无线电力传输的设备，包括：至少一个电力传输天线，用于通过使用多个谐振频率以磁谐振的方式传输无线电力信号，所述多个谐振频率具有彼此不同的带宽；无线电力信号生成模块，用于生成所述无线电力信号；至少一个无线电力转换模块，用于对由所述无线电力信号生成模块生成的所述无线电力信号的电力电平进行转换，所述无线电力转换模块具有与所述电力传输天线的多个谐振频率的带宽相对应且彼此不同的电力电平转换范围；复用器匹配模块，用于选择性地将所述无线电力转换模块连接至对应的电力传输天线；以及控制单元，用于根据待充电装置的需求电力选择性地连接所述电力传输天线和所述无线电力转换模块，以调整所述无线电力信号的电力电平。
优选地，该设备还包括：无线通信模块，用于发送检测信号以检测所述待充电装置并执行与所述待充电装置的数据通信。
优选地，所述控制单元接收由所述无线通信模块检测到的所述待充电装置的充电状态信息。
优选地，所述控制单元基于所述待充电装置的充电状态信息计算所述待充电装置的需求电力。
优选地，所述待充电装置的充电状态信息包括用于区别地标识相应待充电装置的标识码和需求电力。
优选地，所述控制单元不断地监视所述待充电装置的充电状态信息，根据监视结果计算所述待充电装置的需求电力，并根据计算得到的需求电力调整所述无线电力信号的电力电平。
优选地，在所述待充电装置的数量为至少一个的情况下，所述控制单元通过时分控制的方式向每个待充电装置传输无线电力信号。
优选地，所述复用器匹配模块在所述无线电力转换模块与所述电力传输天线之间进行阻抗匹配。
在另一个方面，本申请提供一种用于控制无线电力传输的方法，包括：(a)选择电力传输天线和无线电力传输模块，所述电力传输天线的谐振频率的带宽能够传输与待充电装置的需求电力对应的无线电力信号，所述无线电力转换模块的电力电平转换范围与相应电力传输天线的谐振频率的带宽对应；(b)根据所述待充电装置的需求电力控制所选择的无线电力转换模块以调整所述无线电力信号的电力电平；以及(c)将所选择的无线电力转换模块连接至所述电力传输天线以传输所述无线电力信号。
优选地，在所述步骤(a)之前，该方法还包括：发送用于检测待充电装置的检测信号以便检测所述待充电装置；以及执行与检测到的待充电装置的数据通信并接收所述待充电装置的充电状态信息。
优选地，在所述步骤(a)中，所述待充电装置的需求电力是基于所述待充电装置的充电状态信息来计算的。
优选地，所述待充电装置的充电状态信息包括用于区别地标识相应待充电装置的标识码和所述需求电力。
优选地，在所述步骤(c)之后，该方法还包括：不断地监视所述待充电装置的充电状态信息；根据监视结果重新计算所述待充电装置的需求电力；以及根据重新计算得到的需求电力调整所述无线电力信号的电力电平。
优选地，所述步骤(a)中，在所述待充电装置的数量为至少一个的情况下，通过时分控制的方式向每个待充电装置传输所述无线电力信号。
优选地，所述步骤(c)中，在所述无线电力转换模块与所述电力传输天线之间进行阻抗匹配。
附图说明
从以下参照说明书附图的实施例说明，本申请的其他目的及方面将变得明显，这些说明书附图中：
图1为示出利用一般感生电动势方式的非接触式充电装置和电池的示意图；
图2为示出根据本申请的无线电力传输设备的示意图；
图3为示出根据本申请的无线电力传输设备的方框图；以及
图4为示出根据本申请的无线电力传输设备的无线电力传输方法的流程图。
附图标记
100：无线电力传输设备
110A、110B、110N：电力传输天线
120：无线电力信号生成模块
130A、130B、130N：电力转换模块
140：复用器匹配模块
150：无线通信模块
160：控制单元
具体实施方式
下文将参照附图对本申请的优选实施例加以详细说明。在说明之前，应注意说明书和权利要求书中使用的术语不应理解为限于其通用及字典上的含义，而应在允许发明人为了最佳解释而适当限定这些术语的原则下基于本申请的技术角度所对应的含义及概念进行解读。因此，此处的说明仅仅是为了阐释的目的而提供的优选示例而已，并非意于限制本申请的范围，所以应当理解在不脱离本申请的精神和范围条件下可进行其他的等效变化和修改。
图2为示出根据本申请的无线电力传输设备的示意图，图3为示出根据本申请的无线电力传输设备的方框图，以及图4为示出根据本申请的无线电力传输设备的无线电力传输方法的流程图。
参见图2和图3，根据本申请的无线电力传输设备100以无线方式将电力传输至诸如便携电子装置和小型家用电器的待充电装置201、202、203，以对相应的待充电装置201、202、203的电池充电或者操作这些装置。
在本申请中，无线电力传输设备100包括至少一个用于无线电力传输的电力传输天线110A、110B、110N。
电力传输天线110A、110B、110N通过使用多个谐振频率以磁谐振的方式来传输无线电力信号，并且被设计成使这些谐振频率具有不同的带宽。虽然一般的无线电力传输设备包括单个电力传输天线和单个无线电力转换模块，但根据本申请的无线电力传输设备100包括了多个具有不同谐振频率的带宽的电力传输天线110A、110B、110N以及多个无线电力转换模块130A、130B、130N，这些无线电力转换模块具有针对多个电力传输天线110A、110B、110N的谐振频率的带宽而言最佳的电力电平转换范围（power levelconversion range）。因此，在将电力传输至多个具有不同需求电力的待充电装置时一般无线电力传输设备效率差，以及电力转换模块必须被设计成具有大电力转换范围等诸如此类的问题在本申请的无线电力传输设备中不会出现。换言之，由于根据本申请的无线电力传输设备100可从多个具有不同谐振频率的带宽的电力传输天线110A、110B、110N和多个与之对应的无线电力转换模块130A、130B、130N中选择电力传输天线110A、110B、110N以及针对需求电力而言最佳的无线电力转换模块130A、130B、130N，并且可使用它们来控制无线电力信号的电力电平，因而可优化无线电力信号的传输效率。
下文将参照图3对根据本申请的无线电力传输设备100的详细配置加以详细说明。
根据本申请的无线电力传输设备100包括：至少一个电力传输天线110A、110B、110N，无线电力信号生成模块120，至少一个无线电力转换模块130A、130B、130N，复用器匹配模块140，无线通信模块150，以及用于控制上述组件的控制单元160。
电力传输天线110A、110B、110N为非辐射天线，其是一种用于通过使用谐振频率以磁谐振的方式传输无线电力信号的信号传输媒介。多个电力传输天线110A、110B、110N被设置为使得谐振频率具有不同的带宽。
无线电力信号生成模块120生成无线电力信号以便执行无线电力传输。
无线电力转换模块130A、130B、130N对无线电力信号生成模块120所生成的无线电力信号的电力电平进行转换。多个无线电力转换模块130A、130B、130N被设置为具有与电力传输天线110A、110B、110N的谐振频率的带宽相对应的不同电力电平转换范围。
复用器匹配模块140选择性地将无线电力转换模块130A、130B、130N连接至对应的电力传输天线110A、110B、110N，并在彼此连接的无线电力转换模块130A、130B、130N与电力传输天线110A、110B、110N之间进行阻抗匹配。
无线通信模块150发送检测信号以检测待充电装置201、202、203，并执行与待充电装置201、202、203的数据通信。
控制单元160充当类似微处理器的作用，并整体上来执行对每个组件进行控制的处理以确保无线电力传输。在使用控制单元160进行的无线电力传输处理中，与无线通信模块150检测到的待充电装置201、202、203执行数据通信，以接收待充电装置201、202、203的充电状态信息，并且基于接收到的充电状态信息来计算相应待充电装置201、202、203的需求电力。这之后，控制单元160选择电力传输天线110A、110B、110N和与之对应的无线电力转换模块130A、130B、130N以使与计算得到的需求电力对应的无线电力信号得以传输，并调整该无线电力信号的电力电平。这之后，控制单元160控制复用器匹配模块140选择性地将无线电力转换模块130A、130B、130N连接至电力传输天线110A、110B、110N，由此通过该电力传输天线110A、110B、110N来传输所述无线电力信号。这里，从待充电装置201、202、203接收到的充电状态信息包括用来区别地标识对应待充电装置201、202、203的标识码以及所述的需求电力。
另外，控制单元160不断地执行与待充电装置201、202、203的数据通信，以监视对应待充电装置201、202、203的充电状态信息。控制单元160根据监视结果重新计算待充电装置201、202、203的需求电力，并控制无线电力转换模块130A、130B、130N以对应重新计算得到的需求电力，且调整无线电力信号的电力电平以将无线电力信号保持在最佳状态，直到待充电装置201、202、203被完全充满电。
同时，在待充电装置201、202、203的数量至少为一个的情况下，控制单元160还控制以使得可通过时分控制的方式将无线电力信号传输到每个待充电装置201、202、203。这种情况下，在本申请中，由于设置有多个无线电力转换模块130A、130B、130N和多个电力传输天线110A、110B、110N，因而可根据每个待充电装置201、202、203的需求电力来选择性地控制这些无线电力转换模块130A、130B、130N和电力传输天线110A、110B、110N，从而优化无线电力信号的传输效率。例如，在同时检测到笔记本（需求电力为20W）和移动通信终端（需求电力为5W）需要充电的情况下，分别选择对应于20W和5W的无线电力转换模块130A、130B、130N和电力传输天线110A、110B、110N，用以通过时分控制的方式对它们进行充电，从而提高电力传输效率。
作为可替代的选择，即使上述实施例中已经说明电力传输天线110A、110B、110N来传输无线电力，但本申请并不仅限于此，电力传输天线110A、110B、110N还可执行与待充电装置201、202、203的数据通信。在这种情况下，可将无线局域网（WLAN）、蓝牙、无线个域网（Zigbee）、磁场通信模块等单独地连接到每个电力传输天线110A、110B、110N。
图4为示出根据本申请的无线电力传输设备的无线电力传输方法的流程图。
下文将参照图4对根据本申请的无线电力传输设备的无线电力传输方法加以说明。
首先，在步骤S10中，控制单元160控制无线通信模块150发送用于检测待充电装置201、202、203的检测信号以使待充电装置201、202、203得以被检测到。换言之，控制单元160通过无线通信模块150周期性地发送探索信号（ping signal）作为检测信号，并基于其中收到的反射信号的大小来确定是否检测到待充电装置201、202、203。
在步骤S20中，控制单元160执行与待充电装置201、202、203的数据通信，以接收待充电装置201、202、203的充电状态信息。换言之，控制单元160传输指令信号，该信号指示无线通信模块150所检测到的待充电装置201、202、203发送充电状态信息，并且，如果待充电装置201、202、203发送了所述充电状态信息作为响应，则控制单元160接收该充电状态信息。这里，充电状态信息可包括用来区别地标识对应的待充电装置201、202、203的标识码以及需求电力信息。在这种情况下，控制单元160首先接收所述标识码以识别该待充电装置，然后，如果识别出该待充电装置，则控制单元160接收所述的需求电力信息。
在步骤S30中，控制单元160基于待充电装置201、202、203的充电状态信息来计算待充电装置201、202、203的需求电力。
在步骤S40中，控制单元160选择谐振频率的带宽能够传输与计算得到的需求电力对应的无线电力信号的电力传输天线110A、110B、110N，以及与之对应的无线电力转换模块130A、130B、130N。
在步骤S50中，控制单元160控制无线电力转换模块130A、130B、130N以对应待充电装置201、202、203的需求电力，以使无线电力信号的电力电平得以调整。
在步骤S60中，控制单元160控制复用器匹配模块140选择性地将无线电力转换模块130A、130B、130N（无线电力信号的电力电平在其中被加以调整）连接至与之对应的电力传输天线110A、110B、110N，并传输所述无线电力信号。此时，复用器匹配模块140在彼此连接的无线电力转换模块130A、130B、130N与电力传输天线110A、110B、110N之间进行阻抗匹配，从而提高无线电力信号的传输效率。
步骤S70由接收无线电力信号的待充电装置201、202、203来执行，且处理继续到步骤S80以确定待充电装置201、202、203的充电状态。在步骤S80中，待充电装置201、202、203确定充电是否完成，并且如果完成充电，则结束处理。否则，如果充电没有完成，则处理继续到步骤S90。
在步骤S90中，待充电装置201、202、203更新充电状态信息。更新后的充电状态信息被再次传输到无线电力传输设备100的控制单元160。
控制单元160可不断地执行与待充电装置201、202、203的数据通信，以使得可重复步骤S20至S60直到待充电装置201、202、203被完全充满。
同时，在步骤S10中检测到至少一个待充电装置201、202、203的情况下，可通过时分控制的方式以多进程（process）来执行步骤S20至S60。
本申请已详细说明如上。然而，应当理解这些详细说明及具体示例虽然指出了本申请的优选实施例，但其仅以例示的方式给出，而基于该详细说明，对于本领域的技术人员当可显见各种落入本申请精神及保护范围内的变化及修改。

Claims (15)

1.一种用于无线电力传输的设备，包括：
至少一个电力传输天线，用于通过使用多个谐振频率以磁谐振的方式传输无线电力信号，所述多个谐振频率具有彼此不同的带宽；
无线电力信号生成模块，用于生成所述无线电力信号；
至少一个无线电力转换模块，用于对由所述无线电力信号生成模块生成的所述无线电力信号的电力电平进行转换，所述无线电力转换模块具有与所述电力传输天线的多个谐振频率的带宽相对应且彼此不同的电力电平转换范围；
复用器匹配模块，用于选择性地将所述无线电力转换模块连接至对应的电力传输天线；以及
控制单元，用于根据待充电装置的需求电力选择性地连接所述电力传输天线和所述无线电力转换模块，以调整所述无线电力信号的电力电平。
2.根据权利要求1所述的用于无线电力传输的设备，还包括：无线通信模块，用于发送检测信号以检测所述待充电装置并执行与所述待充电装置的数据通信。
3.根据权利要求2所述的用于无线电力传输的设备，其中所述控制单元接收由所述无线通信模块检测到的所述待充电装置的充电状态信息。
4.根据权利要求3所述的用于无线电力传输的设备，所述控制单元基于所述待充电装置的充电状态信息计算所述待充电装置的需求电力。
5.根据权利要求4所述的用于无线电力传输的设备，其中所述待充电装置的充电状态信息包括用于区别地标识相应待充电装置的标识码和需求电力。
6.根据权利要求4所述的用于无线电力传输的设备，其中所述控制单元不断地监视所述待充电装置的充电状态信息，根据监视结果计算所述待充电装置的需求电力，并根据计算得到的需求电力调整所述无线电力信号的电力电平。
7.根据权利要求1所述的用于无线电力传输的设备，其中，在所述待充电装置的数量为至少一个的情况下，所述控制单元通过时分控制的方式向每个待充电装置传输无线电力信号。
8.根据权利要求1所述的用于无线电力传输的设备，其中所述复用器匹配模块在所述无线电力转换模块与所述电力传输天线之间进行阻抗匹配。
9.一种用于控制无线电力传输的方法，包括：
(a)选择电力传输天线和无线电力传输模块，所述电力传输天线的谐振频率的带宽能够传输与待充电装置的需求电力对应的无线电力信号，所述无线电力转换模块的电力电平转换范围与相应电力传输天线的谐振频率的带宽对应；
(b)根据所述待充电装置的需求电力控制所选择的无线电力转换模块以调整所述无线电力信号的电力电平；以及
(c)将所选择的无线电力转换模块连接至所述电力传输天线以传输所述无线电力信号。
10.根据权利要求9所述的用于控制无线电力传输的方法，在所述步骤(a)之前，还包括：
发送用于检测待充电装置的检测信号以便检测所述待充电装置；以及
执行与检测到的待充电装置的数据通信并接收所述待充电装置的充电状态信息。
11.根据权利要求10所述的用于控制无线电力传输的方法，其中，在所述步骤(a)中，所述待充电装置的需求电力是基于所述待充电装置的充电状态信息来计算的。
12.根据权利要求11所述的用于控制无线电力传输的方法，其中所述待充电装置的充电状态信息包括用于区别地标识相应待充电装置的标识码和所述需求电力。
13.根据权利要求11所述的用于控制无线电力传输的方法，在所述步骤(c)之后，还包括：
不断地监视所述待充电装置的充电状态信息；
根据监视结果重新计算所述待充电装置的需求电力；以及
根据重新计算得到的需求电力调整所述无线电力信号的电力电平。
14.根据权利要求9所述的用于控制无线电力传输的方法，其中，在所述步骤(a)中，在所述待充电装置的数量为至少一个的情况下，通过时分控制的方式向每个待充电装置传输所述无线电力信号。
15.根据权利要求9所述的用于控制无线电力传输的方法，其中，在所述步骤(c)中，在所述无线电力转换模块与所述电力传输天线之间进行阻抗匹配。
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