CN106230062B - 无线电力接收器及其控制方法 - Google Patents
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
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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
- 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
- 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
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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
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- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- 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
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Abstract
提供控制用于以无线方式接收电力的无线电力接收器的方法和装置。该方法包括:接收具有第一量级的第一电力;向无线电力发送器发送第一信号;在接收第一电力期间与该无线电力发送器建立通信连接,其中该通信连接与第一信号关联;在接收第一电力期间加入由该无线电力发送器控制的无线电力网络;以及在加入该无线电力网络之后接收具有第二量级的第二电力,其中第二量级比第一量级大。
Description
本申请为申请日为2012年9月7日、申请号为201280043154.8的发明名称为“无线电力接收器及其控制方法”的申请案的分案申请。
技术领域
本发明一般涉及无线电力接收器及其控制方法,且更具体地,涉及能够以预定义方式通信的无线电力接收器及其控制方法。
背景技术
诸如例如蜂窝电话机或个人数字助理(PDA)的移动终端由可充电电池供电。为了给可充电电池充电,使用单独的充电设备向移动终端的电池提供电力。通常,充电设备和电池都提供有单独的外部接触端子,以使得通过建立外部接触端子之间的接触而将充电设备和电池电连接。
然而,接触型充电方法的问题在于,所述接触端子由于向外突出而可以被外来物质污染,从而导致不适当的电池充电。此外,当接触端子暴露于湿气中时,电池充电被不适当地执行。
已经开发无线充电、或无接触充电技术并且应用于许多电子产品以便解决上述问题。
无线充电技术使用无线电力发送/接收,其示例包括可以通过将蜂窝电话机置于充电垫上来自动对蜂窝电话机的电池进行充电而无需将蜂窝电话机连接到单独的充电连接器的系统。采用该技术的电子产品例如包括无线电动牙刷和无线电动剃须刀,这是通常为公众所知的。无线充电技术的优点在于,它可以通过以无线方式对电子产品充电来改善电子产品的防水功能。无线充电技术的优点还在于,它可以增强电子产品的便携性,因为它没有必要使用有线充电器。
无线充电技术大致分为使用线圈的电磁感应耦合方法、使用共振的磁共振耦合方法、以及通过电能转换的微波来发送电能的射频(RF)/微波辐射方法。
电磁感应耦合方法一直是无线充电的主流方法,但是国内外最近已经成功实现通过使用微波在几十米的距离上以无线方式发送电力的一系列实验。
电磁感应耦合方法在初级线圈和次级线圈之间传送电力。当磁体相对于电线线圈移动时产生感应电流。利用该原理,在发送端产生磁场,并且根据磁场的变化在接收端感应出电流以产生能量。该效应被称为磁感应效应。使用磁感应效应的电力传递方法的能量发送效率优异。
磁共振耦合方法起源于通过使用基于耦合模式理论的磁共振电力传递原理甚至可以在几米的距离从充电设备以无线方式传送电力的系统。无线充电系统使用共振的物理概念,即,酒杯按照与相邻的共振音叉相同的振荡频率共振的现象。代替声音,使得携带电能的电磁波共振。由于仅当存在具有共振频率的设备时才直接传送该共振电磁波,并且其未使用的部分被重新吸收到电磁场中而非在空气中散布,所以认为,不同于其他电磁波,共振电磁波对周边的机器或人体将没有影响。
发明内容
技术问题
已经积极开展关于无线充电技术的研究,但尚未提出建立用于无线充电优先级、无线电力发送器/接收器搜索、无线电力发送器与无线电力接收器之间的通信频率选择、无线电力控制、匹配电路选择、一个充电周期中用于每个无线电力接收器的通信时间分配等的标准。
解决方案
诸如例如蜂窝电话机或个人数字助理(PDA)的移动终端由可充电电池供电。为了给可充电电池充电,使用单独的充电设备向移动终端的电池提供电力。通常,充电设备和电池都提供有单独的外部接触端子,以使得通过建立外部接触端子之间的接触而将充电设备和电池电连接。
然而,接触型充电方法的问题在于,所述接触端子由于向外突出而可以被外来物质污染,从而导致不适当的电池充电。此外,当接触端子暴露于湿气中时,电池充电被不适当地执行。
已经开发无线充电、或无接触充电技术并且应用于许多电子产品以便解决上述问题。
无线充电技术使用无线电力发送/接收,其示例包括可以通过将蜂窝电话机置于充电垫上来自动对蜂窝电话机的电池进行充电而无需将蜂窝电话机连接到单独的充电连接器的系统。采用该技术的电子产品例如包括无线电动牙刷和无线电动剃须刀,这是通常为公众所知的。无线充电技术的优点在于,它可以通过以无线方式对电子产品充电来改善电子产品的防水功能。无线充电技术的优点还在于,它可以增强电子产品的便携性,因为它没有必要使用有线充电器。
无线充电技术大致分为使用线圈的电磁感应耦合方法、使用共振的磁共振耦合方法、以及通过电能转换的微波来发送电能的射频(RF)/微波辐射方法。
电磁感应耦合方法一直是无线充电的主流方法,但是国内外最近已经成功实现通过使用微波在几十米的距离上以无线方式发送电力的一系列实验。
电磁感应耦合方法在初级线圈和次级线圈之间传送电力。当磁体相对于电线线圈移动时产生感应电流。利用该原理,在发送端产生磁场,并且根据磁场的变化在接收端感应出电流以产生能量。该效应被称为磁感应效应。使用磁感应效应的电力传递方法的能量发送效率优异。
磁共振耦合方法起源于通过使用基于耦合模式理论的磁共振电力传递原理甚至可以在几米的距离从充电设备以无线方式传送电力的系统。无线充电系统使用共振的物理概念,即,酒杯按照与相邻的共振音叉相同的振荡频率共振的现象。代替声音,使得携带电能的电磁波共振。由于仅当存在具有共振频率的设备时才直接传送该共振电磁波,并且其未使用的部分被重新吸收到电磁场中而非在空气中散布,所以认为,不同于其他电磁波,共振电磁波对周边的机器或人体将没有影响。
已经积极开展关于无线充电技术的研究,但尚未提出建立用于无线充电优先级、无线电力发送器/接收器搜索、无线电力发送器与无线电力接收器之间的通信频率选择、无线电力控制、匹配电路选择、一个充电周期中用于每个无线电力接收器的通信时间分配等的标准。
根据本发明的一方面,提供一种控制用于以无线方式接收电力的无线电力接收器的方法。该方法可以包括:接收具有第一量级的第一电力;向无线电力发送器发送第一信号;在接收第一电力期间与该无线电力发送器建立通信连接,其中该通信连接与第一信号关联;在接收第一电力期间加入由该无线电力发送器控制的无线电力网络;以及在加入该无线电力网络之后接收具有第二量级的第二电力,其中第二量级比第一量级大。
根据本发明的另一方面,提供一种用于以无线方式接收电力的无线电力接收器。该无线电力接收器可以包括:通信单元,配置来向无线电力发送器发送第一信号;电力接收单元,配置来接收具有第一量级的第一电力。其中该通信单元还配置来在接收第一电力期间与该无线电力发送器建立通信连接并且加入由该无线电力发送器控制的无线电力网络,其中该通信连接与第一信号关联,其中该电力接收单元还配置来在加入该无线电力网络之后接收具有第二量级的第二电力,其中第二量级比第一量级大。
附图说明
通过结合附图的详细描述,本发明的以上和其他方面、特征、和优点将变得更加明显,其中:
图1是示出根据本发明的实施例的无线充电系统的整体操作的图;
图2a是示出根据本发明的实施例的无线电力发送器和无线电力接收器的结构的框图;
图2b是示出根据本发明的实施例的无线电力接收器的具体结构的框图;
图3a是示出根据本发明的实施例的控制无线电力接收器的方法的流程图;
图3b是示出根据本发明的另一实施例的控制无线电力接收器的方法的流程图;
图4是根据本发明的实施例的无线电力网络的时序图;
图5a示出根据本发明的实施例的用于无线电力接收器和Wi-Fi通信的频率之间的比较;
图5b是示出根据本发明的实施例的无线电力接收器执行信道扫描的顺序的图;
图6是示出根据本发明的实施例的无线电力接收器加入无线电力网络的过程的时序图;
图7是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的信号发送/接收的时序图;
图8是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的信号发送/接收的图;
图9是根据本发明的实施例的用于无线电力网络的MAC层位于数据结构中的图;
图10是根据本发明的实施例的无线电力接收器处于检测状态时的时序图;
图11是根据本发明的实施例的无线电力接收器处于搜索状态时的时序图;
图12是根据本发明的实施例的无线电力接收器处于登记状态时的时序图;
图13是根据本发明的实施例的无线电力接收器处于待机状态时的时序图;
图14是根据本发明的实施例的无线电力接收器处于充电状态时的时序图;以及
图15a和15b是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的通信的时序图。
具体实施方式
参照附图详细地描述本发明的实施例。相同或相似的元件可以由相同或相似的参考编号指代,虽然它们在不同附图中示出。另外,虽然说明书中提供了数字限制,但是应当注意,这样的数字限制仅作为示例提供。另外,为了避免模糊本发明的主题,可以省去本领域公知的构造或过程的具体描述。
图1是示出根据本发明的实施例的无线充电系统的整体操作的图。如图1所示,无线充电系统包括无线电力发送器100以及至少一个无线电力接收器110-1、110-2、...、110-n。
无线电力发送器100分别向至少一个无线电力接收器110-1、110-2、...、110-n以无线方式发送电力。更具体地,无线电力发送器100仅向已经完成给定验证过程的经验证的无线电力接收器以无线方式发送电力。
无线电力发送器100与每个无线电力接收器110-1、110-2、...、110-n实现电连接。例如,无线电力发送器100以电磁波的形式向每个无线电力接收器110-1、110-2、...、110-n以无线方式发送电力。
此外,无线电力发送器100与每个无线电力接收器110-1、110-2、...、110-n执行双向通信。无线电力发送器100以及每个无线电力接收器110-1、110-2、...、110-n处理或发送/接收包括预定帧的分组。将在下面更详细地说明该帧。具体地,每个无线电力接收器110-1、110-2、...、110-n可以通过移动通信终端、PDA、个人媒体播放器(PMP)、智能电话机等实现。
无线电力发送器100向多个无线电力接收器110-1、110-2、...、110-n以无线方式提供电力。例如,无线电力发送器100通过使用磁共振耦合方法向多个无线电力接收器110-1、110-2、...、110-n发送电力。当无线电力发送器100采用磁共振耦合方法时,无线电力发送器与多个无线电力接收器110-1、110-2、...、110-n之间的距离优选地小于或等于30米。当无线电力发送器100采用电磁感应耦合方法时,无线电力发送器100与多个无线电力接收器110-1、110-2、...、110-n之间的距离优选地小于或等于10厘米。
每个无线电力接收器110-1、110-2、...、110-n从无线电力发送器100接收电力以执行其中提供的电池的充电。而且,无线电力接收器110-1、110-2、...、110-n向无线电力发送器100发送关于无线电力发送的请求信号、关于无线电力接收的信息、无线电力接收器状态信息、无线电力发送器控制信息等。下面更详细地描述这样的信号或信息。
每个无线电力接收器110-1、110-2、...、110-n向无线电力发送器100发送指示其充电状态的消息。
无线电力发送器100包括诸如例如液晶显示器的显示部件,并且基于从每个无线电力接收器110-1、110-2、...、110-n接收的消息来显示每个无线电力接收器110-1、110-2、...、110-n的状态。此外,除了每个无线电力接收器110-1、110-2、...、110-n的状态之外,无线电力发送器100还显示直到无线电力接收器110-1、110-2、...、110-n完成其充电为止预期的时间段。
无线电力发送器100可以向每个无线电力接收器110-1、110-2、...、110-n发送用于禁止无线充电功能的控制信号。当接收到用于禁止无线充电功能的控制信号时,无线电力接收器禁止无线充电功能。
图2a是示出根据本发明的实施例的无线电力发送器和无线电力接收器的结构的框图。
如图2a所示,无线电力发送器200包括电力发送单元211、控制单元212、和通信单元213。无线电力接收器250包括电力接收单元251、控制单元252、和通信单元253。
电力发送单元211提供无线电力发送器200所需的电力,并以无线方式发送电力到无线电力接收器250。电力发送单元211利用交流(AC)电力波形直接给无线电力接收器250供电,或者通过提供直流(DC)电力波形并且使用逆变器将DC电力波形转换为AC电力波形来向无线电力接收器250提供AC电力波形。电力发送单元211也可以实现为内部电池或用于从外部源接收电力并向其他组件提供所接收的电力的电力接收接口的形式。本领域的技术人员将容易明白,对电力发送单元211没有限制,只要它能够提供一定的AC电力波形。
电力发送单元211还以电磁波的形式向无线电力接收器250提供交流电力波形。电力发送单元211进一步包括环形线圈,因而发送或接收预定电磁波。当电力发送单元211由环形线圈实现时,该环形线圈具有可变电感(L)。本领域的技术人员将容易明白,对电力发送单元211没有限制,只要它能够发送/接收电磁波。
控制单元212控制无线电力发送器200的整体操作。控制单元212通过使用从存储单元读出的用于控制所需的算法、程序、或应用来控制无线电力发送器200的整体操作。控制单元212可以以中央处理器(CPU)、微处理器、小型计算机等形式实现。下面更详细地说明控制单元212的具体操作。
通信单元213按照预定方式与无线电力接收器250执行通信。通信单元213通过使用近场通信(NFC)、紫蜂通信、红外通信、可见光通信、蓝牙通信、蓝牙低能量通信等与无线电力接收器250的通信单元253执行通信。根据本发明的实施例,通信单元213通过使用IEEE802.15.4紫蜂通信执行通信。下面更详细地描述用于选择由通信单元213使用的频率和信道的配置。上述通信方案仅仅是例示性的,并且本发明的范围不限于通信单元213执行的具体通信方案。
此外,通信单元213发送包含关于无线电力发送器200的信息的信号。通信单元213可以单播、组播、或广播该信号。表1示出根据本发明的实施例的从无线电力发送器200发送的信号的数据结构。无线电力发送器200在预定周期中发送具有如下面表1所示的帧的信号。该信号被称为“通知信号”。
【表1】
表1中,“Frame Type”是指示信号类型的字段,并且指示相应信号是通知信号。“Protocol Version”是指示通信协议类型的字段,并且可以分配例如4比特。“SequenceNumber”是指示对应信号的序列的字段,并且可以分配例如1字节。作为示例,“SequenceNumber”可以对应于信号发送/接收步骤增加1。“Network ID”是指示无线电力发送器200的网络标识符(ID)的字段,并且可以分配例如1字节。“RX to Report(schedule mask)”是指示要向无线电力发送器200发送报告的无线电力接收器的字段,并且可以分配例如1字节。表2示出根据本发明的实施例的RX to Report(schedule mask)字段。
【表2】
表2中,Rx1到Rx8可以对应于无线电力接收器1到8。RX to Report(schedulemask)可以被实现为使得其schedule mask数字是1的无线电力接收器向无线电力发送器200发送报告。
再参照表1,“Reseved”是保留供将来使用的字段,并且可以分配例如5字节。“Number of RX”是指示无线电力发送器200周围的无线电力接收器的数目的字段,并且可以分配例如3比特。
具有表1所示的帧格式的信号可以以分配给IEEE802.15.4数据结构的WPT的格式实现。表3示出IEEE 802.15.4数据结构。
【表3】
Preamble | SFD | Frame Length | WPT | CRC16 |
如表3所示,IEEE802.15.4数据结构可以包括“Preamble”、“SFD”、“FrameLength”、“WPT”、和“CRC16”字段,并且表1的数据结构可以被包括在WPT字段中。
通信单元213从无线电力接收器250接收电力信息。电力信息可以包括无线电力接收器250的容量、电池等级、充电计数、电池使用量、电池容量、以及电池百分比的至少一个。而且,通信单元213发送用于控制无线电力接收器250的充电功能的充电功能控制信号。充电功能控制信号可以是用于控制特定的无线电力接收器250的电力接收单元251启用或禁止无线电力接收器250的充电功能的控制信号。
通信单元213还可以从其他无线电力发送器以及无线电力接收器250接收信号。作为示例,通信单元213可从其他无线电力发送器接收具有表1的帧的通知信号。
虽然图2a示出电力发送单元211和通信单元213为不同的硬件单元,因而无线电力发送器200执行带外通信,但这仅仅是例示性的。根据本发明的实施例,也可以将电力发送单元211和通信单元213实现为单个硬件单元,因而无线电力发送器执行带内通信。
无线电力发送器200和无线电力接收器250发送/接收各种信号,这允许无线电力接收器250执行加入在无线电力发送器200控制下的无线电力网络的过程以及通过无线电力发送/接收的充电过程。将在下文中更详细地描述这些过程。
图2b是示出根据本发明的实施例的无线电力接收器的具体结构的框图。
如图2b所示,无线电力接收器250包括电力接收单元251、控制单元252、通信单元253、整流单元254、DC/DC转换单元255、开关单元256、和充电单元257。
结合图2a来描述电力接收单元251、控制单元252、和通信单元253。整流单元254将电力接收单元251以无线方式接收的电力整流为直流电力,并且可以例如以桥接二极管的形式实现。DC/DC转换单元255按预定增益来转换已整流的电力。例如,DC/DC转换单元255转换已整流的电力以使得输出级259处的电压为5V。此外,可以施加到DC/DC转换单元255的输入级258的电压具有预定的最大和最小值。该信息被记录在“请求加入”信号的“InputVoltage MIN”和“Input Voltage MAX”字段中,如下面详细描述。此外,施加到DC/DC转换单元255的输出级259的额定电压值和传导到DC/DC转换单元255的输出级259的额定电流值被分别记录在“请求加入”信号的“Typical Output Voltage”和“Typical Output Current”字段中。
开关单元256将DC/DC转换单元255连接到充电单元257。开关单元256在控制单元252的控制下维持ON/OFF(接通/断开)状态。当开关单元处于ON状态时,充电单元257存储从DC/DC转换单元255输入的已转换的电力。
图3a是示出根据本发明的实施例的控制无线电力接收器的方法的流程图。
无线电力接收器250在步骤S301确定从中以无线方式接收电力的无线电力发送器200。例如,无线电力接收器250基于从无线电力发送器200接收的搜索响应信号的接收信号强度指示符(RSSI)来确定从中以无线方式接收电力的无线电力发送器200,下面详细描述。
无线电力接收器250在步骤S303加入在无线电力发送器200控制下的无线电力网络。例如,无线电力接收器250发送加入请求信号,并且基于响应于加入请求信号接收的接入响应信号加入无线电力网络,下面详细描述。
无线电力接收器250在步骤S305响应于从无线电力发送器200接收的命令信号发送报告信号。当无线电力接收器250从无线电力发送器200接收包含充电命令的命令信号时,它在步骤S309执行充电。相反,当无线电力接收器250未从无线电力发送器200接收包含充电命令的命令信号时,它在步骤S305向无线电力发送器200发送报告。
图3b是示出根据本发明的另一实施例的控制无线电力接收器的方法的流程图。
无线电力接收器250在步骤S311开机或布置在无线电力发送器的附近。无线电力接收器250在步骤S313搜索无线电力发送器,并与搜索到的无线电力发送器当中的一个无线电力发送器200建立通信网络。无线电力接收器250向各无线电力发送器发送无线电力发送器搜索信号,并基于从各无线电力发送器接收的搜索响应信号来确定一个无线电力发送器200。无线电力接收器250通过其网络ID来识别每个无线电力发送器。
无线电力接收器250在步骤S315加入在所确定的无线电力发送器200控制下的无线电力网络。例如,无线电力接收器250发送加入请求信号到无线电力发送器200,并且基于响应于加入请求信号接收的接入响应信号而加入无线电力网络。当无线电力接收器250加入在无线电力发送器200控制下的无线电力网络时,无线电力发送器200向无线电力接收器250分配会话ID。
无线电力接收器250在步骤S317在执行充电之前维持待机状态。无线电力接收器250从无线电力发送器200接收命令信号,并响应于命令信号向无线电力发送器200发送报告信号。当从无线电力发送器200接收包含充电命令的命令信号时,无线电力接收器250在步骤S319开始充电。例如,无线电力接收器250通过控制使开关单元256处于ON状态来执行充电。当无线电力接收器250的充电完成、或发送的电力不够将无线电力接收器250的充电单元完全充电时,无线电力发送器200控制使无线电力接收器250处于待机状态。此外,控制无线电力接收器250以使得它必须总是在从登记状态转变到充电状态之前进入待机状态。
图4是根据本发明的实施例的无线电力网络的时序图。具体地,图4是说明无线电力接收器(RX)440搜索多个无线电力发送器(TX)411、421、422、431并且确定与之建立配对的无线电力发送器的过程的时序图。
无线电力接收器440在步骤S451在IEEE802.15.4信道11 410上发送无线电力发送器搜索信号。IEEE802.15.4标准涵盖信道11至信道26。IEEE802.15.4标准中信道与频率之间的关系如下表4所示。表4中,所有的频率单位为kHz。
【表4】
频率 | 信道 |
2405 | 11 |
2410 | 12 |
2415 | 13 |
2420 | 14 |
2425 | 15 |
2430 | 16 |
2435 | 17 |
2440 | 18 |
2445 | 19 |
2450 | 20 |
2455 | 21 |
2460 | 22 |
2465 | 23 |
2470 | 24 |
2475 | 25 |
2480 | 26 |
无线电力接收器440可以产生无线电力发送器搜索信号,并且在步骤S451向信道11 410的无线电力发送器411发送所产生的无线电力发送器搜索信号。无线电力发送器搜索信号可以具有如下表5所示的数据结构,并且被称为“搜索信号”。
【表5】
表5中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是搜索信号。“Protocol Version”是指示通信协议类型的字段,并且分配例如4比特。“SequenceNumber”是指示对应信号的序列的字段,并且分配例如1字节。作为示例,“SequenceNumber”可以对应于信号发送/接收步骤而增加1。具体地,如果表1的通知信号具有序列号1,则表5的搜索信号具有序列号2。“Company ID”是指示无线电力接收器440的制造商信息的字段,并且分配例如1字节。“Product ID”是指示无线电力接收器440的产品信息的字段,而且例如无线电力接收器440的序列号信息被记录在该字段中。“Product ID”字段分配例如4字节。“Impedance”是指示无线电力接收器440的阻抗信息的字段,并且分配例如4比特。“Class”是指示无线电力接收器440的额定功率信息的字段,并且分配例如4比特。
无线电力发送器411在步骤S451接收该搜索信号,并响应于搜索信号产生无线电力发送器搜索响应信号。无线电力发送器搜索响应信号具有如下面表6所示的数据结构,并且被称为“响应搜索信号”。
【表6】
表6中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是响应搜索信号。“Sequence Number”是指示对应信号的序列的字段,并且分配例如1字节。例如,“Sequence Number”可以对应于信号发送/接收步骤而增加1。“Protocol Version”是指示协议版本的字段,并且分配例如1字节。“HW Version”是指示无线电力发送器的硬件版本的字段,并且分配例如1字节。“Network ID”是指示无线电力发送器411的网络标识符(ID)的字段,并且分配例如1字节。“Company ID”是指示制造商信息的字段,并且分配例如1字节。“Product ID”是指示无线电力发送器的设备信息的字段,并且分配例如4字节。“Class”是指示无线电力发送器的功率类别的信息的字段,并且分配例如1字节。
无线电力接收器440在步骤S452接收响应搜索信号,并且存储响应搜索信号的RSSI信息。当完成执行信道11 410的操作时,无线电力接收器440执行到信道m 420的信道改变,并重复上述操作。更具体地,无线电力接收器440在步骤S453发送搜索信号。存在于信道m 420中的无线电力发送器421、422各自在步骤S454和S455向无线电力接收器440发送响应搜索信号。无线电力接收器440存储在步骤S454和S455中接收的响应搜索信号的RSSI信息。
当完成执行信道m 420的操作时,无线电力接收器440执行到信道26430的信道改变并重复上述操作。更具体地,无线电力接收器440在步骤S456发送搜索信号。存在于信道26 430中的无线电力发送器431在步骤S457向无线电力接收器440发送响应搜索信号。无线电力接收器440存储在步骤S457中接收的响应搜索信号的RSSI信息。
无线电力接收器440将具有最小RSSI值的无线电力发送器确定为从中接收电力的无线电力发送器。
无线电力接收器440按照如图5a和5b所示的方式执行信道改变。无线电力接收器440按照例如信道11、信道24、信道15、和信道20的顺序执行信道扫描。近来的无线电力接收器(例如,智能手机)包括独立于用于与无线电力发送器通信的通信模块的Wi-Fi模块。Wi-Fi通信使用如图5a中所示的频带。图5a比较用于无线电力接收器和Wi-Fi通信的频率。
图5a上边的曲线图示出IEEE 802.15.4通信使用的频率和信道的概念,如表4所示。类似于表4,IEEE802.15.4频率与信道之间的关系在上边的曲线图中示出。
图5a下边的曲线图示出Wi-Fi通信中使用的频率和信道。Wi-Fi 1 511信道使用大约2402到2422kHz的频率,Wi-Fi信道6 512使用大约2427到2447kHz的频率,而Wi-Fi信道11513使用大约2452到2472kHz的频率。
具体地,可以确认不对应于Wi-Fi通信中使用的频率或对应于相对较弱的Wi-Fi信号的IEEE802.15.4信道是信道11、15、20、和24,例如,由参考标号521和522所示。
因此,无线电力接收器440可以对信道11、15、20、和24执行信道扫描。
图5b是示出无线电力接收器440执行信道扫描的顺序的图。无线电力接收器440扫描信道11 531、信道24 532、信道15 533、然后信道20 534。无线电力接收器开始信道扫描的信道可以改变。
以上描述了无线电力接收器440确定从中以无线方式接收电力的无线电力发送器的配置。下文中,提供无线电力接收器440加入在所确定的无线电力发送器控制下的无线电力网络的过程的描述。
图6是示出根据本发明的实施例的无线电力接收器加入无线电力发送器控制的无线电力网络的过程的时序图。
无线电力接收器620在步骤S631向无线电力发送器610发送加入请求信号。
无线电力接收器620产生加入请求信号(以下称为“请求加入信号”)并且发送产生的请求加入信号。无线电力接收器620在步骤S632从无线电力发送器610接收加入响应信号(以下称为“响应加入信号”),因而可以确定是否允许其加入无线电力网络。无线电力接收器620在步骤S633向无线电力发送器610发送确认(ACK)信号。然而,无线电力接收器620也可以省略ACK信号的发送。
基于所接收的请求加入信号,无线电力发送器610确定是否允许无线电力接收器620加入无线电力网络。例如,无线电力发送器610确定无线电力接收器620所需的电力量是否超过无线电力发送器610的可能的输出电力量,从而确定是否允许无线电力接收器620加入无线电力网络。无线电力发送器610产生包含关于是否允许无线电力接收器620加入无线电力网络的信息的响应加入信号,并且向无线电力接收器620发送所产生的响应加入信号。
请求加入信号和响应加入信号分别具有下面表7和8所示的数据结构。
【表7】
表7中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是请求加入信号。“Reserved”是保留用于将来使用的字段,并且分配例如4比特。“Sequence Number”是指示对应信号的序列的字段,并且分配例如1字节。作为示例,“Sequence Number”对应于信号发送/接收步骤而增加1。“Network ID”是指示无线电力发送器610的网络ID的字段,并且分配例如1字节。“Product ID”是指示无线电力接收器620的产品信息的字段,例如,无线电力接收器620的序列号信息被记录在该字段中。“Product ID”字段分配例如4字节。“InputVoltage MIN”是指示施加到无线电力接收器620的DC/DC转换单元的输入级的最小电压值的字段,并且分配例如1字节。“Input Voltage MAX”是指示施加到无线电力接收器620的DC/DC转换单元的输入级的最大电压值的字段,并且分配例如1字节。“Typical OutputVoltage”是指示施加到无线电力接收器620的DC/DC转换单元的输出级的额定电压值的字段,并且分配例如1字节。“Typical Output Current”是指示传导到无线电力接收器620的DC/DC转换单元的输出级的额定电流值的字段,并且分配例如1字节。
【表8】
Frame Type | Reserved | Sequence Number | Network ID | Permission | Session ID |
响应加入 | 4比特 | 1字节 | 1字节 | 4比特 | 4比特 |
表8中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是响应加入信号。“Reserved”是保留用于将来使用的字段,并且分配例如4比特。“Sequence Number”是指示对应信号的序列的字段,并且分配例如1字节。例如,“Sequence Number”可以对应于信号发送/接收步骤而增加1。“Network ID”是指示无线电力发送器610的网络ID的字段,并且分配例如1字节。“Permission”是指示是否允许无线电力接收器620加入无线电力网络的字段,并且分配例如4比特。作为示例,当Permission字段被设置为1时,其指示允许无线电力接收器620加入无线电力网络。但是,当允许字段被设置为0时,其指示不允许无线电力接收器620加入无线电力网络。“Session ID”是指示无线电力发送器610告知无线电力接收器620以便控制无线电力网络的会话ID的字段,并且分配例如4比特。
无线电力接收器620继续发送请求加入信号直到它从无线电力发送器610接收到响应加入信号。另外,无线电力发送器610继续发送响应加入信号直到它从无线电力接收器620接收到ACK信号。
图7是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的信号发送/接收的时序图。具体地,图7的时序图对应于无线电力接收器处于待机状态的情况。
如图7所示,无线电力发送器710在步骤S731、S733、和S735向加入无线电力发送器710控制的无线电力网络的每个无线电力接收器721、722、723发送命令信号。命令信号指示无线电力发送器710命令对应的无线电力接收器执行的操作。下文中将该信号称为“命令信号”。命令信号具有如下表9中所示的数据结构。
【表9】
表9中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是命令信号。“Session ID”是指示无线电力发送器710告知每个无线电力接收器721、722、723以便控制无线电力网络的会话ID的字段,并且分配例如4比特。“Sequence Number”是指示对应信号的序列的字段,并且分配例如1字节。例如,“Sequence Number”可以对应于信号发送/接收步骤而增加1。“Network ID”是指示无线电力发送器710的网络ID的字段,并且分配例如1字节。“Command Type”是指示命令类型的字段,并且分配例如4比特。“Variable”是用于补充Command字段的字段,并且分配例如4比特。Command和Variable字段可以包括如下表10所示的各种示例。
【表10】
“Charge Start”是相应的无线电力接收器开始充电的命令。“Charge Finish”是相应的无线电力接收器完成充电的命令。“Request Report”是相应的无线电力接收器发送报告信号的命令。“Reset”是初始化命令。“Channel Scan”是相应的无线电力接收器执行信道扫描的命令。“Channel Change”是相应的无线电力接收器执行信道改变的命令。
图7的实施例中,无线电力发送器710向每个无线电力接收器721、722、723发送命令类型对应于“请求报告”的命令信号。
当从无线电力发送器710接收命令信号时,每个无线电力接收器721、722、723在步骤S732、S734、和S736发送报告信号或ACK信号。更具体地,当接收其命令类型对应于“请求报告”的命令信号时,相应的无线电力接收器发送报告信号。相反,当接收其命令类型对应于“请求报告”之外的任何命令类型的命令信号时,相应的无线电力接收器发送ACK信号。报告信号是用于向无线电力发送器710报告对应的无线电力接收器的当前状态的信号,并且被称为“报告信号”。报告信号具有如下表11所示的数据结构。
【表11】
在表11中,“Frame Type”是指示信号类型的字段,并且指示相应的信号是报告信号。“Session ID”是指示无线电力发送器710告知每个无线电力接收器721、722、723以便控制无线电力网络的会话ID的字段,并且分配例如4比特。“Sequence Number”是指示对应信号的序列的字段,并且分配例如1字节。例如,“Sequence Number”可以对应于信号发送/接收步骤而增加1。“Network ID”是指示无线电力发送器710的网络ID的字段,并且分配例如1字节。“Input Voltage”是指示施加到每个无线电力接收器721、722、723的DC/DC转换单元的输入级的电压值的字段,并且分配例如1字节。“Output Voltage”是指示施加到每个无线电力接收器721、722、723的DC/DC转换单元的输出级的电压值的字段,并且分配例如1字节。“Output Current”是指示传导到每个无线电力接收器721、722、723的DC/DC转换单元的输入级的电流值的字段,并且可以分配例如1字节。
无线电力发送器710继续发送命令信号,直到它接收来自每个无线电力接收器721、722、723的报告信号或ACK信号为止。当无线电力发送器710未能在预定的时间段内从特定的无线电力接收器中接收响应于命令信号的报告信号或ACK信号时,它在竞用时段期间重发命令信号给相应的无线电力接收器。
图8是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的信号发送/接收的图。如图8所示,无线电力发送器810在步骤S831、S832和S833向每个无线电力接收器821、822、823发送通知信号。通告信号具有如表1所示的数据结构。无线电力发送器810定期性地发送通知信号,并且无线电力发送器810发送通知信号的周期可以被称为“1超帧周期”。该通知信号被用作在1超帧周期的各期间的同步信号。另外,如表1所示,通知信号包括要Rx to Report(schedule mask)字段。因此,当新周期开始时,无线电力发送器810指定对其执行通信的无线电力接收器。例如,下面表12中示出其中通知信号的Rx to Report字段被填充的情形。
【表12】
当通知信号的Rx to Report(schedule mask)字段如表12所示被填充时,第一无线电力接收器821和第n无线电力接收器823在对应周期期间与无线电力发送器810执行通信,但是第二无线电力接收器822不与无线电力发送器810执行通信。
图9是根据本发明的实施例的位于数据结构中的用于无线电力网络的MAC层的图。
参照图9,物理层包括前导码序列字段911、帧起始定界符(SFD)字段912、帧长度字段913、以及MAC协议数据单元(MPDU)字段914,如上表3所述。此外,MAC协议数据单元(MPDU)字段914包含帧控制字段901、数据序列号字段902、帧有效载荷字段903、和CRC-16字段904。根据本发明的各种信号可以使用帧控制字段901、数据序列号字段902、和帧有效载荷字段903。
上面已经描述无线电力发送器与无线电力接收器之间各种信号的发送/接收。下文中,将与施加的电力一起描述无线电力发送器与无线电力接收器之间的各种信号的发送/接收。具体地,在下面的描述中,无线电力接收器的状态将被分为检测状态、搜索状态、登记状态、待机状态、和充电状态。
图10是根据本发明的实施例的无线电力接收器处于检测状态时的时序图。
如图10所示,无线电力发送器1061维持检测状态,在其中它在每个固定的检测周期(tdet_per)的有效检测时段(tdet)发送检测电力(Pdet)1071、1081、1091。依赖于无线电力发送器1061通过感测在其电力发送单元或谐振器的负载值的变化以检测在其覆盖范围内的候选设备的存在或不存在所需的最小电力和时间来确定该检测电力的大小和有效检测时段的长度。具体地,由于仅需要感测谐振器的负载的变化来检测候选设备(诸如,例如金属物体),可以通过在足够感测谐振器的负载值的短时间内定期性地产生低电压正弦波来最小化检测状态下的功耗。此外,在有效检测时段期间维持检测状态直到检测到新设备为止。
作为示例,当无线电力接收器被布置在无线电力发送器1061上时,无线电力发送器1061可以检测负载的变化,从而识别其周围布置了物体。虽然图10示出无线电力发送器1061基于负载变化检测来检测物体,但这仅是例示性的,无线电力发送器1061可以通过检测各种条件(参数)(诸如,例如电压、电流、温度、和相位)中的变化来检测物体。
图11是根据本发明的实施例的无线电力接收器处于搜索状态时的时序图。
无线电力发送器1101维持检测状态,在其中它在每个固定的检测周期(tdet_per)的有效检测时段(tdet)发送检测电力(Pdet)1110、1111。当无线电力接收器1102布置在无线电力发送器1101附近时,无线电力发送器1101在发送检测电力1111的时段期间可以感测与之对应的负载变化并且掌握这样的情形。
当在有效检测时段内检测到设备时,无线电力发送器1101发送驱动电力(Preg)1114。驱动电力1114是可用于驱动无线电力接收器1102的控制单元或MCU的电力。无线电力接收器1102可以发送搜索信号1112,并且无线电力发送器1101可以响应于搜索信号1112而发送响应搜索信号1113。
图12是根据本发明的实施例的无线电力接收器处于登记状态时的时序图。
如上参照图11描述的,无线电力发送器1201施加驱动电力1211。无线电力接收器1202发送搜索信号1212,无线电力发送器1201响应于搜索信号1212而发送响应搜索信号1213。因此,建立无线电力发送器1201与无线电力接收器1202之间的配对。
无线电力接收器1202发送请求加入信号1214,而无线电力发送器1201在有效登记时段(treg)等待接收请求加入信号1214。
当接收到请求搜索信号时,无线电力发送器1201发送响应加入信号1215。如上所述,响应加入信号1215包括允许(Permission)字段,并且在允许字段中记录的值0或1指示是否允许无线电力接收器1202加入在无线电力发送器1201控制下的无线电力网络。当响应加入信号1215的允许字段具有0值时,无线电力接收器1202不被允许加入无线电力网络,并且可以处于待机状态。相反,当响应加入信号1215的允许字段具有值1时,无线电力接收器1202可以进入充电状态并接收充电电力1217。此外,无线电力发送器1201定期地发送通知信号1216。
图13是根据本发明的实施例的无线电力接收器处于待机状态时的时序图。如上所述,无线电力接收器1302优选地在进入充电状态之前进入待机状态。
在登记状态下,无线电力接收器1302可以发送请求加入信号1312,无线电力发送器1301响应于请求加入信号1312而发送响应加入信号1313。另外,如上所述,无线电力发送器1301以预定的周期(tcycle)发送通知信号1314、1317。在相对短的时间中发送通知信号1314、1317以便不影响整个周期(tcycle)。
无线电力发送器1301在分配给无线电力接收器1302的时间期间发送命令信号1315,并且接收响应于命令信号1315的报告信号1316或ACK信号。当无线电力发送器1301未能接收报告信号1316或ACK信号时,它在竞用时段期间重新发送命令信号。如上所述,命令信号1315包括命令类型(Command Type)字段,无线电力接收器1302可以在命令类型字段对应于“充电开始(Charge Start)”时进入充电状态。
图14是根据本发明的实施例的无线电力接收器处于充电状态时的时序图。
无线电力发送器1401在预定周期(tcycle)中发送通知信号1412、1413、1417、1420。在待机状态下,无线电力发送器1401发送命令信号1414,无线电力接收器1402响应于命令信号1414而发送报告信号1415。
无线电力发送器1401可以解析报告信号,从而确定是否向无线电力接收器1402发送充电电力(Pcharge)。例如,无线电力发送器1401通过报告信号解析无线电力接收器1402的当前电力信息,从而确定是否向无线电力接收器1402发送充电电力(Pcharge)。
当无线电力发送器1401确定发送充电电力(Pcharge)时,它将驱动电力1411增加到充电电力(Pcharge),然后施加增加的充电电力(Pcharge)。无线电力发送器1401发送其命令类型对应于“充电开始”的命令信号1418。
无线电力接收器1402解析命令信号1418,并且通过控制开关单元为ON状态来执行充电。命令信号1418包含命令无线电力接收器1402在接收命令信号1418后的预定时间执行充电的信息。由此,无线电力接收器1402在接收命令信号1418后的预定时间执行充电。无线电力接收器1402发送ACK信号1419。
图15a和15b是示出根据本发明的实施例的无线电力发送器与无线电力接收器之间的通信的时序图。图15a和15b是示出无线电力发送器与无线电力接收器之间使用蓝牙低能量进行通信的时序图。
无线电力发送器的控制单元1050周期性地输出检测电力1002。当无线电力接收器被布置在无线电力发送器上时,无线电力发送器的控制单元1050在步骤S1001检测负载大小的变化。通信单元1060在步骤S1003和S1009定期发送通知信号。然而,第一次,假定无线电力接收器没有布置在无线电力发送器上。无线电力发送器的控制单元1050无法检测到负载值的变化。
用户1095在步骤S1004将无线电力接收器放在无线电力发送器上。
无线电力发送器的控制单元1050在预定的周期后输出负载检测电力,并在步骤S1007检测负载值的突然变化。当无线电力发送器的控制单元1050在有效检测时段内检测到无线电力接收器时,无线电力发送器的控制单元1050发送驱动电力(Preg)。驱动电力具有用于驱动无线电力接收器的控制单元109的量级的电力,并具有比负载检测电力较大的量级1008。
通过驱动电力开启无线电力接收器的控制单元1090。无线电力接收器的控制单元1090在步骤S1006启动无线电力接收器的通信单元1080。
无线电力接收器的通信单元1080可以通过控制单元1090的控制使用第二信道。第二信道是不同于无线电力发送器的通信单元1060所使用的信道的由另一个无线电力发送器1070使用的信道。无线电力发送器的通信单元1060所使用的信道可以被称为第一信道。
可以确定用于确定控制单元1090的检测信道的顺序。可以在由蓝牙低能量方案定义的多个信道中随机地确定控制单元1090的第一检测信道。
通信单元1080在步骤1010在第二信道中发送搜索信号。搜索信号包含无线电力接收器的设备信息。搜索信号被称为无线电力接收器的设备信息。例如,无线电力接收器的设备信息可以包括无线电力接收器的ID和关于设备的信息。关于设备的信息可以包括以下至少一个:制造商信息、序列号、协议版本、硬件版本、以及关于无线电力接收器的充电参数。无线电力接收器的设备信息包括以下至少一个:协议版本、序列号、制造商信息、设备信息、阻抗信息、电力容量信息、设备ID信息、网络ID信息和无线充电服务配置文件。
图15a中假定无线电力发送器1070使用第二信道。三个无线电力发送器1070的每一个在步骤S1011、S1014、S1017向通信单元1080发送响应搜索信号。通信单元1080在步骤1013、1016、和1019向三个无线电力发送器1070的每一个发送ACK信号。
通信单元1080进一步在步骤S1020、S1021、和S1022发送搜索信号。
控制单元1090将检测信道从第二信道改变为第一信道。控制单元1080在步骤S1023使用第一信道发送搜索信号。通信单元1060使用第一信道接收搜索信号,控制单元1050在步骤S1024保存无线电力接收器的ID以及RSSI值。控制单元1050在步骤1025将保存的RSSI值与阈值进行比较。控制单元1050在步骤S1026基于比较结果来确定是否响应。如果控制单元1050确定要响应,则通信单元1060在步骤S1028发送响应信号。响应信号包括无线电力发送器的设备信息。响应信号包括以下至少一个:协议版本、序列号、制造商信息、设备信息、阻抗信息、所需电量信息和无线充电配置文件。无线电力发送器的设备信息包括以下至少一个:协议版本、序列号、无线电力发送器的ID信息、无线电力接收器的ID信息、无线充电服务配置文件、设备ID信息以及电力级别。
控制单元1090在步骤S1032控制通信单元1080。通信单元1080在步骤S1029发送无线电力接收器的ID和设备信息。控制单元1050在步骤S1030接收无线电力接收器的ID和设备信息。控制单元1050在步骤S1031确定是否加入无线电力接收器。
当无线电力发送器确定要加入无线电力接收器时,在步骤S1033通信单元1060向通信单元1080发送连接信号。连接信号包含以下至少一个:连接的持续时间、无线电力发送器的地址以及无线电力接收器的地址。无线电力接收器在步骤S1034基于接收的连接信号得知无线电力发送器的ID和参数。
根据本发明的另一实施例,无线电力发送器可以直接地(即,在两个步骤中)接收搜索信号然后发送连接信号。
现在参照图15b,通信单元1060在步骤S1035向通信单元1080发送无线电力发送器的参数信号(TX参数)。无线电力发送器的参数信号(TX参数)包括以下至少一个:无线电力发送器的ID、无线电力接收器的ID、制造商信息、序列号、协议版本、硬件版本、无线电力发送器的电力容量、正在充电的无线电力接收器的数目、充电的电力容量、无线电力发送器的剩余电力容量。
通信单元1080在步骤S1036发送无线电力接收器的参数信号(RX参数)。
控制单元1050在步骤S1037得知无线电力接收器的参数信息。控制单元1050在步骤S1038确定是否将无线电力接收器加入到无线电力网络。控制单元1050在步骤S1039创建用于加入无线电力接收器的允许信号,并且在步骤S1040向通信单元1080发送允许信号。
控制单元1050定期检测负载值的变化。控制单元1050在步骤S1041检测到负载值无变化。通信单元1060在步骤S1043发送通知信号。控制单元1050将输出电力增加1042所示的量,并发送充电电力。通信单元1060在步骤S1044向通信单元1080发送充电开始信号。控制单元1090在步骤S1045基于充电开始信号开始充电。例如,控制单元1090在步骤S1046控制使开关为ON状态。通信单元1080在步骤S1047向通信单元1060发送报告信号或ACK。通信单元1060在步骤S1049发送请求报告信号。控制单元1090在步骤S1050检测充电状态。控制单元1090在步骤S1051基于检测的充电状态产生报告信号。通信单元1080在步骤S1052发送所产生的报告信号。如上所示,本发明提供基于蓝牙低能量方案的无线电力充电。
虽然已经参照其某些实施例示出和描述本发明,但是本领域的技术人员将理解,这里可以在形式和细节上进行各种改变而不脱离如所附权利要求限定的本发明的精神和范围。
Claims (6)
1.一种控制无线电力接收器的方法,该方法包括步骤:
从无线电力发送器接收作为启动无线电力接收器的通信单元的第一电力;
在启动通信单元后,向该无线电力发送器发送第一信号;
在接收第一电力期间从该无线电力发送器接收与第一信号对应的第二信号;
在接收第一电力期间,通过基于第一信号和第二信号在无线电力接收器和无线电力发送器之间建立的通信连接,加入与该无线电力发送器对应的无线电力网络;
从该无线电力发送器接收指示充电开始命令的第三信号;
基于接收第三信号,通过使用从该无线电力发送器接收的第二电力开始充电该无线电力接收器的电池。
2.如权利要求1所述的方法,还包括:
响应于接收第二信号向该无线电力发送器发送第四信号;以及
从该无线电力发送器接收第五信号,其中第五信号与第四信号对应。
3.如权利要求2所述的方法,其中第四信号包括该无线电力接收器的状态并且第五信号包括该无线电力发送器的能力。
4.一种无线电力接收器,该无线电力接收器包括:
电池;
通信单元;
电力接收单元,配置来接收作为启动该通信单元的第一电力;和
控制单元,配置为:
在启动通信单元后,通过该通信单元向无线电力发送器发送第一信号;
在接收第一电力期间通过该通信单元从该无线电力发送器接收与第一信号对应的第二信号;
在接收第一电力期间,通过基于第一信号和第二信号在无线电力接收器和无线电力发送器之间建立的通信连接,加入与该无线电力发送器对应的无线电力网络;
通过该通信单元从该无线电力发送器接收指示充电开始命令的第三信号;以及
基于接收第三信号,控制该无线电力接收器通过使用从该无线电力发送器接收的第二电力开始充电该电池。
5.如权利要求4所述的无线电力接收器,其中该通信单元还配置来响应于接收第二信号向该无线电力发送器发送第四信号,以及从该无线电力发送器接收第五信号,其中第五信号与第四信号对应。
6.如权利要求5所述的无线电力接收器,其中第四信号包括该无线电力接收器的状态并且第五信号包括该无线电力发送器的能力。
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WO2013036067A2 (en) | 2013-03-14 |
EP3627655B1 (en) | 2021-01-13 |
EP2568572A1 (en) | 2013-03-13 |
US20130063082A1 (en) | 2013-03-14 |
IN2014CN02466A (zh) | 2015-06-19 |
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