CN111357165A - 用于无线功率传输和通信的***和方法 - Google Patents
用于无线功率传输和通信的***和方法 Download PDFInfo
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Abstract
公开了一种***,其包括:无线功率接收器;电池充电***,其耦合到无线功率接收器并且被配置为使用从无线功率接收器接收的功率对电池进行充电;以及无线数据通信***,其耦合到无线功率接收器和电池充电***,无线数据通信***被配置为确定功率需求并且利用无线功率接收器发送功率需求。
Description
相关申请
本申请要求2017年9月18日提交的第62/560,155号美国临时专利申请的权益和优先权,该临时专利申请为了所有目的通过引用并入本文,如同在此完整阐述一样。
技术领域
本公开总地涉及无线功率传输和通信,更具体地涉及用于无线功率传输和通信的***和方法,其提供数据包格式和其他合适的特征以改善无线功率传输和通信。
背景技术
无线功率传输是已知的,但通常比较简单并且不包括附加功能。
发明内容
公开了一种***,其包括:无线功率接收器;电池充电***,其耦合到无线功率接收器并且被配置为使用从无线功率接收器接收的功率对电池进行充电;以及无线数据通信***,其耦合到无线功率接收器和电池充电***,无线数据通信***被配置为确定功率需求并且利用无线功率接收器发送功率需求。
通过检查以下附图和详细描述,本公开的其他***、方法、特征和优点对于本领域技术人员将是或变得显而易见。所有这样的附加***、方法、特征和优点均旨在被包括在本说明书中,在本公开的范围内,并由所附权利要求书保护。
附图说明
参考以下附图能够更好地理解本公开的各方面。附图中的部件可按比例绘制,但重点在于清楚地示出本公开的原理。此外,在附图中,相似的附图标记在多个视图中表示相应的部件,其中:
图1是示出根据本公开的示例性实施例的示例性数据包格式的示意图;
图2是根据本公开的示例性实施例的用于利用数据包格式的***的示意图;
图3是根据本公开的示例性实施例的滤波器电路的示意图;
图4是根据本公开的示例性实施例的用于控制接收器选择性地向发送器发送数据的示意图;以及
图5是根据本公开的示例性实施例的用于控制无线功率接收器处的电池的充电的算法的示意图。
具体实施方式
在下面的描述中,在整个说明书和附图中,相似的部件用相同的附图标记来标记。附图可按比例绘制,并且为了清楚和简洁起见,某些部件可以以一般性或示意性形式示出并且通过商业名称来标识。
无线功率接口可依赖于调谐的驱动器和调谐的接收器以使功率传输最大化。调制负载处的电压和电流驱动能力的通信可通过调制接收器侧的电容性负载来管理,从而将信号反射到发送器侧。然而,调制接收器会导致接收器复杂网络失谐,从而降低功率传输的效率。通过使接收器侧的通信所需的脉冲数最少化,可控制失谐。为了解决该先前未识别的问题,公开了一种使用通信包之间的频率和脉冲持续时间的新颖方法,该方法为当在同一信道上包括数据传输时功率传输失谐的问题提供了技术解决方案。
图1是示出根据本公开的示例性实施例的示例性数据包格式100的示意图。数据包格式100提供了特定于无线功率和通信***的功能,例如通过数据脉冲频率和持续时间的最小化来防止失谐。
数据包格式100包括每隔tsym周期发送一次的包102,其中,包持续时间基本小于tsym以便防止失谐。每个包102可包括以下比特中的一个或多个:
PRE–一个或多个脉冲的初始序列,每个脉冲具有合适的脉冲宽度例如20微秒,其中,如果存在两个或更多个脉冲,则每个脉冲可以以预定的时间段间隔开,例如250微秒,并且具有总预定时间,例如1000微秒。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
ST–一个或多个脉冲的开始序列,每个脉冲具有合适的脉冲宽度例如20微秒,以预定时间间隔开,并且具有总预定时间例如1000微秒。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
P1–具有合适的脉冲宽度例如20微秒并且具有总预定时间例如750微秒的功率比特。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
P0–具有合适的脉冲宽度例如20微秒并且具有总预定时间例如500微秒的功率比特。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
D0–具有合适的脉冲宽度例如20微秒并且具有总预定时间例如500微秒的数据比特。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
E5-E1–扩展比特,每个扩展比特具有合适的脉冲宽度例如20微秒并且具有总预定时间例如500微秒。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
E0–具有合适的脉冲宽度例如20微秒并且具有总预定时间例如750微秒的扩展比特。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
C2–具有合适的脉冲宽度例如20微秒并且具有总预定时间例如500微秒的控制记录校验比特。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
C1-C0–控制记录校验比特,每个控制记录校验比特具有合适的脉冲宽度例如20微秒并且具有总预定时间例如750微秒。脉冲可在预定时间开始时开始,可在预定时间结束时发生,或者可在预定时间期间的任何合适的点发生。
以下示例比特序列可用于对数据进行编码以供处理器使用,或者也可或替代地使用其他合适的比特序列:
功率比特数据
数据比特D0可被设置为例如“0”的预定值,以指示正在使用扩展包。扩展比特E5至E2可被设置为例如用于扩展包的“0 0 0 0”的预定值。
扩展比特数据
可基于合适的控制记录协议对控制记录校验比特进行编码,例如以对P1、P0、D0、E1和E0比特中的多个“1”比特或其他合适的数据进行编码。
包宽度不需要及时固定,并且可随着包内的不同通信需求而变化。每个比特值可由初始脉冲下降/上升沿和到下一个上升/下降沿脉冲的时间来确定,或者也可或替代地使用其他合适的编码过程。为了使被误读为脉冲沿的噪声瞬变最小化,可使用脉冲检测器来应用算法以确定脉冲何时具有预定的阈值特性,例如足够高和/或足够宽。脉冲检测器算法可使用模拟电路、数字滤波或两者的组合来实现,其取决于负载和观测到的检测电压或其他合适的参数。
通过修改或调整通信端口开关处的电容值,例如在给定时间对多个数据比特进行编码,可使接收器电路以不同的程度失谐。失谐可通过在发送侧提供更高幅度的脉冲来实现,其可随后被用作区别信号。对于多个接收器,也可利用适当的处理来区分哪个接收器正在与公共发送器侧通信。另外,可动态地调整通信开关处的电容器,以在通信协议中提供额外的灵活性,例如建立主接收器和从接收器。幅度调整还可用于在不增加附加脉冲的情况下在包流中发送附加电平的信息,例如通过使用四个电平而非两个电平(二进制)或其他合适的电平相关信令。
图2是根据本公开的示例性实施例的用于利用数据包格式100的***200的示意图。***200包括发送器204、接收器202和接收器主控制单元206,它们中的每一个均能够以硬件或以硬件和软件的适当组合来实现。
发送器204例如通过与接收器202形成谐振电路而将功率信号发送到接收器202,以允许无线功率的有效传输。另外,发送器204可例如通过对已经调制到无线功率传输信道上的数据进行解码而经由无线功率传输信道接收数据通信。因此,发送器204可包括用于控制谐振电路的形成、用于传输功率以及用于接收数据的一个或多个控制电路和***,例如一个或多个晶体管、电容器、电感器和一个或多个控制器,诸如已编程以执行预定功能并分析来自无线功率传输通道的编码数据的微控制器。
接收器202包括一个或多个电路和***,用于接收无线功率、形成和控制用于无线功率传输的谐振通信信道、对本地电池进行充电、从无线电源切换到作为电源的本地电池、对状态和运行条件数据进行编码以通过谐振通信信道传输到发送器,以及以降低谐振通信信道中的谐振损耗的格式传输编码数据。接收器202可包括在一种或多种算法的控制下运行的微控制器,以提供和协调最小负载208、半同步整流器210、频率检测212、com开关214、分频器216、发送器到接收器警报/重置218、数据调制器220、降压调节器222、充电控制器224、电流源230和232以及其他合适的功能。
接收器主控制单元206为接收器202提供一个或多个用户指示符或控件,例如充电使能控件、充电结束指示符、发送器到接收器警报、数据调制器使能等等。接收器主控制单元206可包括一个或多个电路和***,例如可编程微控制器。
***200调节SYSOUT处的恒定输出电压,该电压独立于电池电压VBAT,从而允许接收器202由电池供电。当电池电压降到预定电压以下时,施加交流电并且启用开关模式电源。充电控制器224调节ISP电流的电平,以在电池电压低时以较低的速率对电池进行线性充电,并且在电池电压等于或大于预定值时以加满充电速率对电池进行线性充电。
在操作的启动模式中,可使用最小负载开关208来管理提供给接收器202的PDC的电压以防止不希望的电压尖峰,最小负载开关208能够提供最小负载以防止这些尖峰。一旦操作处于稳定状态并且***处于闭环控制下,则最小负载开关208可被关闭,使得启动负载从***中被移除,从而提高从发送器204到接收器202的整体效率。。
可通过感测PDC电压然后生成用于通过COM1和COM2传输的通信包来管理到接收器202侧的功率管理,如所讨论的(最大功率、增加功率、降低功率、不变)。这些控制信号可用于使发送器204基于分组来调节输出到接收器202的功率。如果在PDC处测得的电压过低,则可对增加功率或发送最大功率的控制进行编码以使发送器204做出适当的响应,例如通过使用具有适当编程的微处理器对具有功率水平(power level)指示的数据信号进行解码,并且相应地调节发送的功率水平。发送器204被配置为接收编码的数据并对数据进行解码并且响应性地修改发送器204的子***的操作。如果在PDC处测得的电压过高,则发送较小功率或不发送功率的控制可被编码以用于数据包中的传输,以使发送器204做出响应。到发送器204的数据通信可通过使耦合到com开关214的电容器的谐振网络失谐来实现,或者以其他合适的方式来实现。
另外,***200可在中等负载条件下以更高的效率工作,例如通过使用半同步整流器210的半桥配置,可根据***的负载要求将半同步整流器210从半桥调制到全桥。
COM1和COM2端口处的带内通信可在高频率下执行,从而能够实现远距离的传输。这提供了不必使用替代通信链路例如蓝牙的附加益处,该替代通信链路可能会增加***的复杂性和成本。
Com开关214可由外部引脚控制,该外部引脚可连接到接收器202中的微控制器,使得微控制器可对要发送到发送器204的数据进行编码和调制,从而对从发送器204接收的数据进行解码或用于其他合适的目的。
可使用充电使能输入CHG_EN来控制电池的充电,并且可在EOC输出上指示充电结束状态。SYSOUT输出用于向由接收器202控制的***提供功率。电流源232驱动热敏电阻RTEMP,并且在每一个两端的差分电压达到所指示的阈值时触发警告指示器226和停机指示器228,该阈值可被调节以在温度升高或降低时适应不同电平的停机。通过TOP_SET引脚,例如通过从电流源230向RTop提供电流,可从外部设置充电控制器224的充电加满电压设置。
图3是根据本公开的示例性实施例的滤波器电路300的示意图。滤波器电路300包括电压源Vs、开关S1、S2和S3,电感器L1和L2以及电容C1、C2和C3,它们中的每一个可以是分立的部件、单个集成电路中的集成部件或分立和集成的电路和部件的适当组合。
当以给定的频率切换由S1和S2形成的半桥时,在LC1的输出端观测到增益。结果,可在输出线圈处获得更高的功率输出。另外,LC1以通过切入或切出额外的电容和/或电感来进行调谐,并且因此可调节在LC1输出端获得的增益。这对于例如用于磁共振***的高频操作非常有效。可选电容C3可用于在S3打开时设置增益。另外,半桥也可以是全桥。
图4是根据本公开的示例性实施例的用于控制接收器202选择性地向发送器204发送数据的示意图400。发送器204包括耦合到集成发送器控制器的两个晶体管,以及耦合到电感耦合机构的初级的三个电容的电感和电容网络。接收器202包括耦合到电感耦合机构的次级的晶体管桥、耦合到晶体管的电流源、耦合到COM1和COM2的晶体管以及在输出端耦合到电感器的晶体管,该输出端被示出为耦合到可选的电池充电器。图400的一个或多个部件可以等效于图2中所示的相应部件。
接收器202上的桥402可用作创建发送器功能的输出端。当接收器202用作发送器时,来自降压调节器222的输出可反向用作升压调节器以提供从电池VBAT到桥402的升压的PDC,在该状态下,其功率输出可由升压调节器通过调节PDC电压来控制。
图5是根据本公开的示例性实施例的用于控制无线功率接收器处的电池的充电的算法500的示意图。算法500可在一个或多个处理器上实现。
算法500从502开始,在502处,接收器处于空闲状态。在空闲状态下,可将电池耦合到***输出端,可接通用于控制电池充电的阻塞FET或其他合适的开关并且可采取其他合适的动作或者可实现状态。然后,该算法进行到504。
在504处,确定***工作电压PDC是否大于预定的欠压锁定电平。如果确定电压不大于欠压锁定电平,则算法返回到502,否则算法进行到506。
在506处,启用开关模式电源,并且算法进行到508,在508处,确定反馈电压是否大于***输出电压。如果反馈电压不大于***输出电压,则算法返回到506,否则算法进行到510,在510处,接通阻塞FET例如以允许对电池进行充电。然后,算法进行到512。
在512处,确定电池电压是否大于预定电压电平。如果确定电池电压不大于该电平,则算法进行到514,在514处,选择电池充电的预充电水平,例如较低的水平。另外,电池状态数据可被编码并调制到无线谐振功率传输信道或其他合适的通信介质上。否则,算法进行到516,在516处,执行正常的电池充电水平。然后,算法进行到518。
在518处,确定反馈电压是否等于预定端电压。如果反馈电压不等于预定端电压,则算法返回到516,否则算法进行到520,在520处,对90%的充电控制信号进行编码并将其从接收器传输到发送器。然后,算法进行到522。
在522处,例如通过根据端电压电平或以其他合适的方式调节***输出的电压电平来执行充电结束协议。另外,可将充电结束数据编码并调制到无线谐振功率传输信道或其他合适的通信介质上。然后,算法进行到524。
在524处,确定电池电流是否小于预定水平。如果否,则算法返回到522,否则算法进行到526,在526处,对100%的充电控制信号进行编码并将其从接收器传输到发送器。然后,算法进行到528。
在528处,执行终止协议。在一个示例性实施例中,可将***输出电压调节到端电压,可禁用充电,可断开电池的连接,可向充电结束输出指示器提供信号,可将电池/充电或其他状态数据编码并调制到无线谐振功率传输信道或其他合适的通信介质上,并且也可以或替代地使用其他合适的过程。然后,算法进行到530。
在530处,确定电池电压是否小于端电压减去预定量,例如60mV。如果否,则算法返回到528,否则算法返回到522。
尽管算法500显示为流程图,但本领域普通技术人员将理解,其可被实现为一个或多个单独的流程图、状态机或以其他合适的方式来实现。
为了提供本公开的非限制性示例,还提供了附加的示例性实施例。就公开了用于部件、电路部件、电路布置等的任何特定值而言,这些值是示例性的,并且将被本领域技术人员理解为适用于利用本文公开的发明构思的其他设计。
如本文所使用的,单数形式“一”,“一个”和“该”也意图包括复数形式,除非上下文另有明确说明。还将理解的是,在本说明书中使用时,术语“包括”和/或“包含”规定了所述特征、整数、步骤、操作、元件和/或部件的存在,但并不排除存在或增加一个或多个其他特征、整数、步骤、操作、元件、部件和/或其组合。如本文所使用的,术语“和/或”包括一个或多个相关所列项的任意一个和所有组合。如本文所使用的,例如“X和Y之间”和“大约X和Y之间”的短语应被解释为包括X和Y。如本文所使用的,例如“大约X和Y之间”的短语是指“大约X和大约Y之间”。如本文所使用的,例如“大约X到Y”的短语是指“大约X到大约Y”。
如本文所使用的,“硬件”可包括分立部件、集成电路、专用集成电路、现场可编程门阵列或其他合适的硬件的组合。如本文所使用的,“软件”可包括在一个或多个处理器(其中处理器包括一个或多个微型计算机或其他合适的数据处理单元、存储设备、输入输出设备、显示器、数据输入设备例如键盘或鼠标、***设备例如打印机和扬声器、关联的驱动器、控制卡、电源、网络设备、扩展坞设备或在软件***的控制下结合处理器或其他设备运行的其他合适的设备)上的一个或多个对象、代理、线程、代码行、子例程、单独的软件应用程序、在两个或更多个软件应用程序中运行的两行或更多行代码或其他合适的软件结构或其他合适的软件结构。在一个示例性实施例中,软件可包括在通用软件应用程序例如操作***中运行的一行或多行代码或其他合适的软件结构,以及在专用软件应用程序中运行的一行或多行代码或其他合适的软件结构。如本文所使用的,术语“耦合”及其关联术语,例如“耦合了”和“耦合的”,可包括物理连接(例如铜导体)、虚拟连接(例如通过数据存储设备的随机分配的存储器位置)、逻辑连接(例如通过半导体设备的逻辑门)、其他合适的连接或所述连接的合适组合。术语“数据”可指用于使用、传输或存储数据的合适结构,例如数据字段、数据缓冲器、具有数据值以及发送方/接收方地址数据的数据消息、具有数据值以及使接收***或部件使用数据执行功能的一个或多个运算符的控制消息,或用于数据的电子处理的其他合适的硬件或软件部件。
通常,软件***是在处理器上运行以响应于预定数据字段执行预定功能的***。例如,***可通过其执行的功能及其执行功能所在的数据字段来定义。如本文所使用的,NAME***(其中NAME通常是由***执行的一般功能的名称)是指被配置为在处理器上运行并且在公开的数据字段上执行公开的功能的软件***。除非公开了特定算法,否则本领域技术人员已知的使用关联的数据字段执行功能的任何合适的算法均被视为落入本公开的范围内。例如,生成包括发件人地址字段、收件人地址字段和消息字段的消息的消息***将包含在处理器上运行的软件,该处理器可从处理器的合适***或设备(例如缓冲设备或缓冲***)获取发件人地址字段、收件人地址字段和消息字段,可将发件人地址字段、收件人地址字段和消息字段组合为合适的电子消息格式(例如电子邮件消息、TCP/IP消息或具有发件人地址字段、收件人地址字段和消息字段的其他任何的消息格式),并且可使用处理器的电子消息***和设备通过通信介质例如网络传输电子消息。本领域普通技术人员将能够基于旨在阐述本公开的示例性实施例的前述公开内容提供针对特定应用程序的特定编码,而不为本领域普通技术人员以下的人员例如不熟悉编程或使用合适编程语言的处理器的人员提供教程。用于执行功能的特定算法可以以流程图形式或以其他合适的形式来提供,其中,数据字段和相关功能可以以示例性的操作顺序来列出,其中,顺序可被适当地重新排列,而不旨在是限制性的,除非明确指出是限制性的。
应当强调的是,上述实施例仅是可能的实施方式的示例。在不脱离本公开的原理的情况下,可对上述实施例做出多种变型和改进。所有这些改进和变型均旨在被包含在本公开的范围内,并由所附权利要求保护。
Claims (18)
1.一种***,包括:
无线功率接收器;
电池充电***,其耦合到所述无线功率接收器并且被配置为使用从所述无线功率接收器接收的功率对电池进行充电;以及
无线数据通信***,其耦合到所述无线功率接收器和所述电池充电***,所述无线数据通信***被配置为确定功率需求并且利用所述无线功率接收器发送所述功率需求。
2.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将一个或多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号。
3.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将一个或多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,每个比特包括降低了谐振损耗的脉冲宽度。
4.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示应发送更大的功率。
5.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示不应对发送的功率水平进行任何改变。
6.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示应发送较小的功率。
7.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示不应再发送功率。
8.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示电池充电水平。
9.根据权利要求1所述的***,还包括数据编码***,所述数据编码***被配置为将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示控制记录检查。
10.一种方法,包括:
在无线功率接收器处接收功率;
使用从所述无线功率接收器接收的功率对电池进行充电;
确定功率需求;以及
使用所述无线功率接收器发送功率需求。
11.根据权利要求10所述的方法,还包括将一个或多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号。
12.根据权利要求10所述的方法,还包括将一个或多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,每个比特包括降低共振损耗的脉冲宽度。
13.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示应发送更大的功率。
14.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示不应对发送的功率水平进行任何改变。
15.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示应发送较小的功率。
16.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示不应再发送功率。
17.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示电池充电水平。
18.根据权利要求10所述的方法,还包括将两个或更多个比特编码为数据包以控制发送到所述无线功率接收器的功率信号,其中,至少两个比特用于指示控制记录检查。
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