CN106458052B - 用于在电动车辆与充电站之间建立关联连接的连接单元和方法 - Google Patents
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Abstract
按照本发明的方案规定,当在电动车辆EV和充电站EVSE之间构建关联连接时,设置具有全向传输特性以及具有定向传输特性的发射器对(TR1、TR2)。在构造定向无线电连接的情况下构建关联连接之后,在全向发射器(TR2)参与的情况下检验所述关联连接。所述措施使得能够禁止与折衷型发送器的不期望的关联连接。
Description
技术领域
本发明涉及用于在电动车辆和感应式充电站之间建立关联连接(Assoziationsverbindung)的装置和方法。
背景技术
为了在充电站处给电动车辆充电,感应式充电系统是已知的。在此情况下,线圈系统不仅位于电动车辆的下侧处,而且位于地面侧充电站中。能量经由穿过所述线圈系统的交变磁场以感应方式从充电站被传输到电动车辆。
可以在将电动车辆在充电站上定位之后执行感应式充电过程,而为此不需要车辆驾驶员下车或者利用充电电缆连接。为了交换定位信息、标识信息和结算信息,在充电站和电动车辆之间的通信连接证明有效,所述通信连接在起动过程期间以及当电动车辆停止时在充电过程期间保持维持。
为了以低损耗和小散射以感应方式对电动车辆充电,有必要的是将充电站的线圈系统和电动车辆的线圈系统尽可能精确地重叠地定位。此外,必须在电动车辆和充电站之间进行明确的分配。所述明确的分配或者“关联连接”是需要的,以便确保:仅与应当在预先确定的充电站上以感应方式被充电的该电动车辆的通信连接被保持(unterhalten)。
为了保证在电动车辆和所设置的充电站之间的明确的分配,方法已经是已知的。按照申请人的在出版物DE 102012012860 A1 中公开的提议规定,经由车辆侧天线与充电站侧天线的耦合来提供在电动车辆和充电站之间的关联连接,其中通过相对于充电站侧天线布置车辆侧天线应当保证:仅所述两个天线可以构建共同的连接。为此,充电站侧天线的方向特性被形成,使得由充电站侧天线所发射的信号仅仅能够在围绕两个天线之间的直接照准线的可预先给定的区域中被接收。此外规定,只有在到达可预先给定的区域、尤其充电位置时才将充电站侧天线的运行激活,以便使关联连接的折衷(Kompromittieren)变得困难。
在上述出版物中所谈及的关联连接折衷的问题领域在进一步的现场试验中证明是问题。因此存在以下风险,即在充电站的无线电区域中的发送器以恶意的方式起作用(vorgibt),假装为要构建的关联连接的对方站,并且为此以其自身的发射功率超过充电站的本身设置的天线的发射功率。
发明内容
本发明的任务是提供以下措施,所述措施保证电动车辆与为了对电动车辆充电而设置的充电站的防折衷式关联连接。
按照本发明,通过用于在电动车辆和充电站之间建立关联连接的方法来解决所述任务。
按照本发明设置用于在电动车辆和充电站之间建立(Herstellung)关联连接的方法,所述方法包括随后阐述的步骤。在第一步骤中,在构造定向无线电连接的情况下在电动车辆和充电站之间构建(Aufbau)关联连接。定向无线电连接可被理解为以下无线电连接,即其中不仅在发送器侧而且在接收器侧在预定义的方向上设置方向特性。定向无线电连接例如棒状地从放置于充电站的地面附近的发送器朝电动车辆的下侧方向延伸。在第二步骤中,与全向发射器共同作用地检验在电动车辆和充电站之间的关联连接。所述的全向发射器可被理解为具有非定向、也即例如球状方向特性的发射器、也即例如天线。
已经预先已知的定向无线电连接如下支持电动车辆的定位,即例如在车辆侧测量的传输强度随着累进(fortschreitend)接近所设置的充电位置由于方向特性累进地增加,并且最终在到达所设置的充电位置时采取最大值,而利用在车辆侧测量的传输强度单独地基于定向无线电连接不能区别:无线电连接是由对此设置的充电站还是由另一折衷型发送器引起的。与全向发射器共同作用地检验在电动车辆和充电站之间的关联连接的按照本发明的该步骤消除所述缺点。在使用全向发射器的情况下利用优选地在电动车辆侧测量的传输强度使得能够在全向无线电连接的传输强度和定向无线电连接的传输强度之间比较。
此外,通过用于在电动车辆和充电站之间建立关联连接的连接单元解决所述任务。
按照本发明设置用于在电动车辆和充电站之间建立关联连接的连接单元,其包括随后阐述的功能组。连接单元拥有到至少一个第一发射器的第一接口,所述第一发射器具有基本上定向的传输特性。此外,连接单元拥有到至少一个第二发射器的第二接口,所述第二发射器具有基本上全向的、也即非定向的传输特性。连接单元与第一发射器共同作用地被设立用于在电动车辆和充电站之间构建关联连接,以及此外被设立用于与第二发射器共同作用地检验所述关联连接。
此外,本发明包括具有按照本发明的连接单元的电动车辆以及具有按照本发明的连接单元的充电站。
按照本发明的一种优选构型规定,在充电站侧布置的定向发射器和在电动车辆侧布置的定向发射器之间进行定向无线电连接。
按照本发明的另一构型规定,全向发射器布置在电动车辆侧。
可替代地,以下构型是有利的,即在所述构型情况下全向发射器不仅布置在电动车辆侧而且布置在充电站侧。上述构型保证在两侧、也就是说在充电站侧和在电动车辆侧对称地进行传输、也即分别相对的发送运行和接收运行。所述有利的措施使得能够不仅在电动车辆的侧上而且在充电站的侧上设置相同的连接单元。
按照本发明的另一构型规定,定向发射器以距全向发射器小的距离布置。所述构型优选地涉及电动车辆,可替代地也涉及充电站。由于按照所述构型小的距离,关联连接的检验如下被简化,即基本上类似的运行条件不仅对于定向无线电连接而且对于全向无线电连接占优势,所述运行条件使关联连接的检验容易。
按照本发明的另一构型规定,为了检验关联连接,将定向无线电连接的传输强度与经由全向发射器传输或者确定的传输强度比较。按照本发明的该构型,因此将全向无线电连接的传输强度、也即信号强度或者场强与定向无线电连接的传输强度比较。传输强度的检验在此是关联连接的最有利的检验。
按照本发明的另一构型规定,为了检验关联连接,如果利用全向发射器传输的或者确定的传输强度的传输强度超过定向无线电连接的传输强度,那么输出负的结果。因为在该情况下可以认为,另外的折衷型发送器出于恶意的意图试图将由充电站发送的无线电信号否决。
按照本发明的另一构型规定,由于所述在上面阐述的负的结果而解除关联连接和/或输出误差信息。在关联连接检验的负的结果的情况下,因此电动车辆与对此设置的充电站的已经开始的关联连接被解除,以便避免由于折衷型发送器而有错误的分配。
附图说明
以下根据附图进一步阐述本发明的其它实施例和优点。在此:
图1示出驶向充电站的电动车辆的示意图;和
图2示出与充电站侧连接单元共同作用的按照本发明的电动车辆侧连接单元的示意图。
具体实施方式
图1示出电动车辆EV,所述电动车辆EV除了(未示出的)其它功能组件外具有车辆侧感应线圈C1以及车辆侧连接模块AU1,所述车辆侧感应线圈C1和所述车辆侧连接模块AU1例如分别被布置在电动车辆EV的下侧处。在接着的论述中假设,电动车辆EV接近感应式充电站EVSE,以便在电动车辆EV停止之后或者在缓慢行驶过程中执行电动车辆EV的(未示出的)蓄电池的感应式充电。
感应式充电站EVSE除了(未示出的)其它功能组件外具有充电站侧连接模块AU2以及充电站侧感应线圈C2。两个最后提及的功能组件AU2、C2位于将近公路水平面SFC之上或者之下的高度中。
在到达充电位置之后,经由关联连接来执行电动车辆EV和充电站EVSE的关联,以便防止给无权的车辆充电。
图2示出车辆侧连接模块AU1和充电站侧连接模块AU2的细节图示,所述充电站侧连接模块AU2按照附图布置在公路水平面SFC之下。在图2中所示出的两个连接模块AU1、AU2的布置对应于所设置的停车位置,其中两个连接模块沿着其主轴对准。在这样的停车位置中,车辆侧感应线圈C1也直接地在充电站侧感应线圈C2之上以及基本上与充电站侧感应线圈C2叠合地布置。
电动车辆侧连接模块AU1包括连接单元CU、第一发射器TR1或者天线TR1和第二发射器TR2或者天线TR2。充电站侧连接模块AU2包括连接单元CU以及第一发射器TR1或者天线TR1。相应的第一发射器TR1具有基本上定向的传输特性,第二发射器TR2具有基本上全向的传输特性。
在按照图2阐述的实施例中,充电站侧连接模块AU2具有仅仅一个第一定向发射器TR1。然而在可替代的(未示出的)实施方式中,充电站侧连接模块AU2的与电动车辆侧连接模块AU1基本上相同的构型也是可能的,其中因此充电站侧连接模块AU2也包括具有基本上全向的传输特性的第二发射器TR2。
全向发射器非定向地、也即在其主轴的方向上基本上球状地发送或者接收,并且优选地被实施为鞭形天线。指向(direktionale)或者定向发射器能够实现朝可预先给定的方向传输的取向(Ausrichtung)。所述指向或者定向发射器优选地被实施为具有对应几何形状的天线。通常所述指向或者定向发射器具有在其主轴方向上的棒状方向特性。
如果现在借助于(未示出的)折衷型发送器试图构建与车辆侧连接模块AU1的无线电连接,那么折衷型发送器可能会提高其自身的传输强度,使得所述传输强度超过充电站侧连接模块AU2的传输强度。在现有技术中,在电动车辆侧连接模块AU1中仅会包含具有定向传输特性的第一发射器TR1。然而单独利用这样定向发射器TR1不能进行评定:充电站EVSE或者折衷型发送器是否是关联连接的正确连接伙伴。
按照本发明,因此在电动车辆EV和充电站EVSE之间的关联连接的检验通过在电动车辆侧连接模块AU1中所设置的全向发射器TR2来设置。
如果从第二电动车辆侧发射器TR2所接收的传输强度具有比从第一电动车辆侧发射器TR1所接收的传输强度高的或者高得多的值,那么可以假定折衷型发送器。
在电动车辆EV占据了在其所分配的充电站EVSE的区域中的停车位置之后,在充电站EVSE与电动车辆EV之间的为了交换定位信息、标识信息和结算信息要设立的无线电连接优选地经由相应的第一定向发射器TR1来保持(unterhalten)。
为了实施本发明证明有利的是,用于保持与所谓的“无线接口芯片(WirelessInterfache Chip)”的无线电连接的常用控制单元支持多个发射器或者天线,并且支持在天线之间的动态转换。以这种方式,可以利用畅销组件实现按照本发明的装置。
按照本发明的方案概括地规定,在构建电动车辆EV和充电站EVSE之间的关联连接的情况下,设置具有全向传输特性以及定向传输特性的发射器对TR1、TR2。在构造定向无线电连接的情况下构建关联连接之后,所述关联连接在全向发射器TR2参与的情况下被检验。所述措施使得能够禁止与折衷型发送器的不期望的关联连接。
Claims (9)
1.用于在电动车辆(EV)和充电站(EVSE)之间建立关联连接的方法,包括以下步骤:
-在构造定向无线电连接的情况下在所述电动车辆(EV)和所述充电站(EVSE)之间构建所述关联连接;
-与全向发射器(TR2)共同作用地检验在所述电动车辆(EV)和所述充电站(EVSE)之间的所述关联连接,
其中为了检验所述关联连接,将所述定向无线电连接的传输强度与经由所述全向发射器(TR2)所传输的传输强度比较,其中进行评定:充电站(EVSE)是否是关联连接的正确连接伙伴。
2.按照权利要求1所述的方法,其特征在于,在充电站侧所布置的定向发射器(TR1)和在电动车辆侧所布置的定向发射器(TR1)之间进行所述定向无线电连接。
3.按照权利要求1或2所述的方法,其特征在于,所述全向发射器(TR2)布置在电动车辆侧。
4.按照权利要求2所述的方法,其特征在于,所述定向发射器(TR1)以距所述全向发射器(TR2)小的距离被布置。
5.按照权利要求1所述的方法,为了检验所述关联连接,如果经由所述全向发射器(TR2)所传输的传输强度超过所述定向无线电连接的传输强度,那么输出负的结果。
6.按照权利要求5所述的方法,所述关联连接由于负的结果被解除和/或误差信息被输出。
7.用于在电动车辆(EV)和充电站(EVSE)之间建立关联连接的连接单元,包括:
-到至少一个第一发射器(TR1)的接口,所述第一发射器(TR1)具有基本上定向的传输特性;和
-到至少一个第二发射器(TR2)的接口,所述第二发射器(TR2)具有基本上全向的传输特性;
其中所述连接单元(CU)与所述第一发射器(TR1)共同作用地被设立用于在所述电动车辆(EV)和所述充电站(EVSE)之间构建关联连接;和
其中所述连接单元(CU)与所述第二发射器(TR2)共同作用地被设立用于检验所述关联连接,
其中为了检验所述关联连接,将定向无线电连接的传输强度与经由所述第二发射器(TR2)所传输的传输强度比较,
其中进行评定:充电站(EVSE)是否是关联连接的正确连接伙伴。
8.电动车辆,其包括按照权利要求7所述的连接单元。
9.充电站,其包括按照权利要求7所述的连接单元。
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