CN112424015A - 用于对电动车充电的dc电压充电桩 - Google Patents
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Abstract
本发明描述了一种用于对电动车充电的DC电压充电桩(100;200;300)。DC电压充电桩(100;200;300)包括两个DC电压充电桩输入连接(102,104),用于具有由中央单元提供的第一电压范围的输入DC电压(VE);第一DC电压转换器(106;302),用于将所述输入DC电压(VE)转换成具有第二电压范围的输出DC电压(VA);两个DC电压充电桩输出连接(108,110),用于将所述输出DC电压(VA)提供给所述电动车;以及控制单元(112),所述控制单元具有用于所述DC电压充电桩(100;200;300)与所述中央单元之间的通信的第一通信接口(114)。
Description
技术领域
本发明涉及用于对电动车充电的DC电压充电桩。
背景技术
为了使用电能对电动车进行充电,一般而言使用充电设备。在家用领域中,这些被称为“壁挂式充电箱(wallbox)”,因为它们通常固定在房屋墙壁。在公共空间,经常设立所谓的充电桩。壁箱和充电桩通常具有一个或若干个插座。插座也被描述为充电点。带插头的充电电缆可连接到插座,或者已经安装好并将电动车与充电设备进行电气连接。
不同的插入式连接类型是已知的,诸如举例而言:
-Schuko插头
-IEC 62196-2type 1(IEC 62196-2类型1),单相AC电流连接;
-IEC 62196-2type 2(IEC 62196-2类型2),单相和三相AC电流连
接;以及
-IEC 62196-2type 3(IEC 62196-2类型3),带保护机构的单相和三相AC电流连接。
Type-2插入式连接大多在欧洲使用,并且还准许用带最高120kW的功率输出的DC电流来充电(Type-2 Tesla(特斯拉)——经由Type-2插头进行DC充电)。
当用AC电流充电时,电动车中通常配备有转换器,它将AC电流转换成电池充电所必需的DC电流。然而,不利的是,为了使用高功率的快速充电,在每一电动车中大且昂贵的转换器都将是必需的。出于这一原因,为了进行快速充电,业界日益关注DC电压或DC电流充电桩,也称为DC桩、DC充电桩或DC快速充电器。
到目前为止,以下快速充电器插入式连接已确立了其自身的地位:
-CCS,组合充电系统,是由德国汽车制造商开发的标准并且自2014年以来在欧盟范围是强制性的,它描述了使用AC电流和DC电流的充电。在此,用于AC电流充电的电动车侧插头配备有type-2插头,而用于DC电流充电的电动车侧插头配备有两个附加的高功率DC电流充电插针。
-Chademo是特别由日本汽车制造商开发的标准。
-Tesla Supercharger(特斯拉超级充电桩)是属于特斯拉的专有技术,用于为特斯拉电动车充电。
根据德国专利申请DE102015110023,还知悉了在充电桩处为插入式机动车充电的充电站或中央单元,其中这一充电站包括功率变压器、若干整流器模块和可再生的缓冲蓄电器。
发明目的
因而,本发明的目标包括改进带中央单元的DC电压充电桩的交互。
发明内容
根据本发明,如权利要求1所述的DC电压充电桩被提供用于对电动车充电。
根据本发明的DC电压充电桩优选地包括用于具有第一电压范围的输入DC电压的两个DC电压充电桩输入连接,其中输入DC电压由中央单元提供。此外,根据本发明的DC电压充电桩包括用于将输入DC电压转换成具有第二电压范围的输出DC电压的第一DC电压转换器,以及用于向电动车提供输出DC电压的两个DC电压充电桩输出连接。根据本发明的DC电压充电桩还可包括控制单元,其具有用于DC电压充电桩和中央单元之间的通信的第一通信接口。
DC电压充电桩例如还被描述为DC电流充电桩、DC桩、DC充电桩或DC快速充电器。
术语“电动车”应当优选地包括以下含义:
-纯电动车,纯用电池电流驱动,英文描述是Battery Electric Vehicle(电池电动车),
-带有电驱动和增程器的车辆;
-混合车辆,英文术语是Hybrid Electric Vehicle(混合电动车);
-插电式混合,英文术语是Plug-In Hybrid Electric Vehicle(插电式混合电动车),以及
-燃料电池车辆。
在此,充电优选地描述了向蓄电器提供电能以用于充电。蓄电器也可被描述为电池。它们在电动车中的用途优选地解释为驱动电池或牵引电池。
一般而言,能够对电池进行快速充电是合乎需要的。尤其是在超出电动车电池的范围的长行程上,快速充电是有利的。电池可以用低功率在长时间上被充电,或者用高功率在短时间内充电;充电能量等于功率乘以充电时间。
DC电压转换器(也称为DC-DC转换器)概括描述了将在输入处提供的DC电压转换成具有更高、更低或反相电压电平的DC电压的电气电路。DC电压转换器通常具有两个输入连接和两个输出连接。
在优选实施例中,控制单元经由第一通信接口传送或接收以下信息项中的至少一者:
-DC电压充电桩的状态,和/或
-与从DC电压充电桩输出的最大功率有关的数据,和/或
-充电能量值,和/或
-充电时间值,和/或
-电动车标识信息,和/或
-软件更新数据。
DC电压桩的状态在此包括例如:
-与电动车是否被连接用于充电有关的信息,和/或
-与电动车是否当前正在充电有关的信息,和/或
-与一个或若干个DC电压转换器的电路系统有关的信息,
-中央单元的可用能量、功率、电压、操作状态、以及将来操作状态(例如,基于供能连接(光伏电流、生物质电流生产)的能量可用性诊断)。
充电能量值优选地包括充电时间与充电功率的乘积。充电能量值和/或充电时间值可用作为计算电池充电销售价格的基础和/或用作为客户信息。
基于电动车标识信息,中央单元或DC电压充电桩可确定什么最大充电功率是相应连接的电动车所允许的,并可输出对应的最大功率且使其对DC电压充电桩可用。
中央单元可包括并控制一个或若干个DC电压充电桩。
根据本发明的DC电压充电桩还可提高能效。
根据又一优选实施例,控制单元可在第一通信接口处支持串行通信标准,尤其是以太网。有线通信(诸如以太网)对于中央单元和DC电压充电桩之间的无线通信可以是有利的,以便例如降低在DC电压充电桩或环境中生成的高频干扰的影响。以太网线缆、路由器和网卡一般不贵并且准许高数据速率;通常,PC和工业计算机已经作为标准配备了以太网接口并且可被用于控制单元或中央单元。对于以太网铜缆,有利地,最高约100米的链路长度是可能的,而以太网玻璃纤维线缆通常甚至更长。
在本发明的进一步有利的进一步发展中,控制单元包括用于DC电压充电桩和电动车之间的通信的第二通信接口。
经由第二通信接口,尤其是电动车的控制单元和电池管理系统可参考通信协议彼此通信。
电池管理系统可以向控制单元传送例如
-电动车电池的当前充电状态,和/或
-DC电压和最大充电电流强度或最大充电功率,和/或
-电池的瞬时电压,和/或
-电池温度。
经由第一通信接口,控制单元可以接收软件更新数据,以更新用于第二通信接口的通信协议。因而,DC电压充电桩还可例如在充电期间与最新电动车持续通信。
根据进一步发展,控制单元可在第二通信接口处支持至少两个不同通信协议,例如Chademo和/或CCS和/或Tesla Supercharger。在一个此类DC电压充电桩处,具有不同插入式连接的电动车因而可在一个充电点处充电。
又一优选实施例可包括DC电压充电桩配备有第二DC电压转换器,其选择性地并联或串联连接到第一DC电压转换器。
DC电压转换器的串联连接可以实现DC电压转换器的诸输出DC电压的相加。DC电压转换器的并联连接可以实现DC电压转换器的诸输出DC电流的增加。在相同输出DC电压下,输出DC电流的增加具有增加DC电压转换器的输出功率的效果。因而,DC电压充电桩可提供不同的充电电压和充电功率。例如,当对锂离子电池充电时,它最初以最大充电功率充电,并且在充电的进一步过程中,充电功率会降低。DC电压充电桩可包括若干个充电点。取决于过程,控制单元可将DC电压转换器从一个充电点切换到另一充电点。DC电压充电桩可包括第三、第四以及在适当情况下进一步的DC电压转换器。所有DC电压转换器的串联或并联连接基本上达到上述效果。根据本发明的DC电压充电桩因而可以按模块化方式设计并且因而能够被简单地扩展。这是有利的,例如在目前的公共或私人建筑基础设施中实施。
根据另一优选实施例,DC电压充电桩具有开关矩阵,所述开关矩阵连接到控制单元、每一DC电压转换器或至少若干DC电压转换器的至少一个输入连接以及DC电压充电桩输入连接。控制单元可以控制开关矩阵,以使所有DC电压变换器并联或串联连接。
优选地,DC电压充电桩包括绝缘测量单元,其连接到DC电压充电柱输入连接并且连接到地或接地,其中绝缘测量单元测量DC电压充电桩对地的绝缘,并取决于该测量将DC电压充电桩从电动车断开电连接。绝缘测量单元可以用于评估DC电压充电桩的功能性和安全性,并可进一步在早期阶段标识缺陷。
中央单元可包括中央DC电压源、变压器和/或缓冲蓄电器或来自光伏发电的直接馈电,其生成输入DC电压并使得一个或若干个DC电压充电桩可用。绝缘测量单元可有利地布置在每一单个DC电压充电桩中,并且仅确定相应DC电压充电桩中的局部绝缘,并在适当的情况下将其与电动车断开连接。
此外,根据前述任一权利要求所述的DC电压充电桩可配备有功率测量单元,该功率测量单元连接至DC电压充电桩输入连接并且确定输出到电动车的功率和/或充电时间。充电能量值优选地包括充电时间或充电时间值与充电功率的乘积。充电能量值和/或充电时间值可用作为计算电池充电销售价格的基础和/或用作为客户信息。
此外,DC电压充电桩可包括温度测量单元,该温度测量单元被配置成因变于测得温度来控制DC电压充电桩的功率输出。DC电压充电桩应当优选地能够在-20℃至45℃的环境温度范围内输出全功率。根据焦耳第一定律,DC电压充电桩的电流传导组件生成一定的热能。如果温度测量单元确定高于预定阈值的环境温度或DC电压充电桩温度,则温度测量单元可以借助控制单元降低DC电压充电柱的功率输出,并从而降低电流传导组件的功率输出,以例如防止组件过热、熔化或着火。
根据进一步的发展,DC电压充电桩包括主开关,该主开关串联连接在第一DC电压转换器和DC电压充电桩输入连接之一之间,其中主开关被配置成将第一DC电压转换器选择性地连接到DC电压充电桩输入连接之一或将其从DC电压充电桩输入连接断开。在这方面,可以取决于紧急停止信号、系统错误信号或DC电压充电桩对地的绝缘来控制至少一个主开关。DC电压充电桩可以包括由DC电压充电桩用户操作并生成紧急停止信号的紧急开关。在发生故障的情形中,控制单元和/或中央单元可以生成系统错误信号。绝缘测量单元可取决于测得的绝缘来控制主开关。此外,可为每一DC电压充电桩输入连接提供一个主开关。
术语“连接”优选地包括含义“电连接”、“连接以便导电”以及“耦合”。
附图说明
本发明的实施例是参考附图和以下描述来解释的。
图1示出了根据本发明的DC电压充电桩,
图2示出了根据本发明的又一DC电压充电桩,
图3示出了根据本发明的又一DC电压充电桩,
具体实施方式
图1示出了用于对电动车的电池充电的DC电压充电桩100。DC电压充电桩100包括两个DC电压充电桩输入连接102、104,用于具有第一电压范围0V到200V或0V到920V的输入DC电压VE,其中接地电势0V被施加到DC电压充电桩输入连接104。输入DC电压由中央单元提供,并且在DC总线供电的上下文中可被配置为对地+1000V或对地±500V。
此外,图1示出了形成第一DC电压转换器的DC电压转换器106,其用于将输入DC电压VE转换成具有第二电压范围1000V的输出DC电压VA。DC电压转换器106还具有两个DC电压充电桩输出连接108、110,用于将输出DC电压VA提供给电动车,其中向DC电压充电桩输出连接180施加500V的电势,并向DC电压充电桩输出连接110施加-500V的电势。
DC电压充电桩106还具有控制单元112,其具有用于DC电压充电桩106和中央单元之间的通信的以太网接口114。
图2示出了DC电压充电桩200,其包括DC电压充电桩100的组件102至114以及系统错误开关202、紧急关闭开关204、以及绝缘开关206和两个主开关208、210。开关202到206连接到控制单元112。在每一情形中,主开关208、210串联连接在DC电压充电柱输入连接102、100和DC电压转换器106之间。如果开关202至206之一被致动,则它们生成致动主开关208、210的信号,使得DC电压转换器106从DC电压充电桩输入连接102、104断开电连接或电绝缘。DC电压充电桩200包括绝缘测量单元212,其测量DC电压充电桩200对地的绝缘。如果测得的绝缘超过预定阈值,则绝缘测量单元212直接致动绝缘开关206,即不涉及控制单元,其中绝缘开关206进而生成致动主开关208、210的绝缘信号,使得DC电压转换器106与DC电压充电桩输入连接102、104断开电连接或电绝缘。
紧急关闭开关204可以在紧急情况下由DC电流充电桩用户致动。紧急关闭开关204生成致动主开关208、210的紧急关闭信号,使得DC电压转换器106从DC电压充电桩输入连接102、104断开电连接或电绝缘。
系统错误开关202可由控制单元112致动,并生成致动主开关208、210的系统错误信号,使得DC电压转换器106从DC电压充电桩输入连接102、104断开电连接或电绝缘。
来自图2的控制单元112还包括电动车通信接口214,其形成用于DC电压充电桩200与电动车的通信的第二通信接口。电动车通信接口包括用于CCS协议216、用于Chademo协议218和用于Tesla-Supercharger协议220的三个协议接口。这三个协议接口被实现为计算机222。计算机222和/或控制单元112包括微型PC或车载计算机,例如Raspberry Pi、Arduino或类似物。
DC电压充电桩200还包括功率测量单元224,功率测量单元224连接到DC电压充电桩输入连接102和104并确定输出到电动车的功率和/或充电时间。充电能量值包括充电时间或充电时间值与充电功率的乘积。充电能量值和/或充电时间值用作为计算电池充电的销售价格的基础和/或用作为客户信息。
图3示出了DC电压充电桩300,其包括DC电压充电桩100的组件102至114、DC电压充电桩200的组件202至224以及第二DC电压转换器302。第二DC电压转换器302被操作来选择性地并联或串联连接到DC电压转换器106。
DC电压充电桩300包括形成开关矩阵308的两个开关304、306。开关304连接到DC电压转换器106的第一输入连接并且将DC电压转换器106的第一输入连接选择性地连接到DC电压转换器302的第一输入连接或者DC电压桩输入连接104。
开关306连接到DC电压转换器302的第一输入连接并且将DC电压转换器302的第一输入连接选择性地连接到DC电压转换器106的第一输入连接或者DC电压桩输入连接102。
开关304和306由控制单元112致动,使得DC电压转换器106、302并联或串联连接。
DC电压转换器106、302的串联连接实现DC电压转换器106、302的诸输出DC电压的相加。DC电压转换器106、302的并联连接实现DC电压转换器106、302的诸输出DC电流的增加。在相同输出DC电压VA下,输出DC电流的增加具有增加DC电压转换器106、302的输出功率的效果。因而,DC电压充电桩300可提供不同的充电电压和充电功率。例如,当对锂离子电池充电时,充电最初以最大充电功率进行,并且充电功率在进一步的充电过程中降低。
所有开关202到210和304、306可被设计为继电器、触点或半导体开关,例如FET或双极晶体管。
权利要求书(按照条约第19条的修改)
1.一种中央单元,所述中央单元包括并控制用于对电动车充电的若干DC电压充电桩(100;200;300),其中所述DC电压充电桩(100;200;300)在每一情形中包括:
-两个DC电压充电桩输入连接(102,104),用于具有由所述中央单元提供的第一电压范围的输入DC电压(VE);
-第一DC电压转换器(106;302),用于将所述输入DC电压(VE)转换成具有第二电压范围的输出DC电压(VA);
-两个DC电压充电桩输出连接(108,110),用于将所述输出DC电压(VA)提供给所述电动车;
其特征在于,
所述DC电压充电桩(100;200;300)在每一情形中包括控制单元(112),所述控制单元具有用于所述DC电压充电桩(100;200;300)与所述中央单元之间的通信的第一通信接口(114)。
2.如权利要求1所述的中央单元,其特征在于,所述控制单元(112)经由所述第一通信接口(114)传送或接收以下信息项中的至少一者:
-所述DC电压充电桩的状态,
-与从所述DC电压充电桩输出的最大功率有关的数据,
-充电能量值,
-充电时间值,
-电动车标识信息,
-软件更新数据。
3.如权利要求1或2所述的中央单元,其特征在于,所述控制单元在所述第一通信接口(114)处支持串行通信标准,尤其是以太网。
4.如前述权利要求中的任一项所述的中央单元,其特征在于,所述控制单元(112)包括用于所述DC电压充电桩(100;200;300)与所述电动车之间的通信的第二通信接口(214)。
5.如权利要求4所述的中央单元,其特征在于,所述控制单元(112)在一个充电点处在所述第二通信接口(114)处支持至少两个不同的通信协议(216,218,220)。
6.如前述权利要求中的任一项所述的中央单元,其特征在于,具有第二DC电压转换器(302),其选择性地并联或串联连接到所述第一DC电压转换器(106)。
7.如权利要求5所述的中央单元,其特征在于,具有第三和第四DC电压转换器(106;302),其中所有DC电压转换器(106;302)选择性地并联或串联连接。
8.如权利要求6或7所述的中央单元,其特征在于,具有开关矩阵(308),所述开关矩阵与所述控制单元(112)、与每一DC电压转换器(106;302)的至少一个输入连接、以及与所述DC电压充电桩输入连接(102,104)相连接,其中所述控制单元(112)控制所述开关矩阵(308),使得所有DC电压转换器(106;302)并联或串联连接。
9.如前述权利要求中的任一项所述的中央单元,其特征在于,具有连接到所述DC电压充电桩输入连接(102,104)和连接到地的绝缘测量单元(212),其中所述绝缘测量单元(212)测量所述DC电压充电桩(100;200;300)到地的绝缘,并且取决于该测量将所述DC电压充电桩(100;200;300)与所述电动车断开电连接。
10.如前述权利要求中的任一项所述的中央单元,其特征在于,具有功率测量单元(224),所述功率测量单元连接至所述DC电压充电桩输入连接(102,104)并且确定输出到所述电动车的功率和/或充电时间。
11.如前述权利要求中的任一项所述的中央单元,其特征在于,具有温度测量单元,所述温度测量单元被配置成取决于测得的温度来控制所述DC电压充电桩(100;200;300)的功率输出。
12.如前述权利要求中的任一项所述的中央单元,其特征在于,具有串联连接在所述第一DC电压转换器(106;302)和所述DC电压充电桩输入连接(102,104)之一之间的至少一个主开关(208,210),其中所述主开关(208,210)被配置成将所述第一DC电压转换器(106;302)选择性地连接到所述DC电压充电桩输入连接(102,104)之一或将其与之断开连接。
13.如权利要求12所述的中央单元,其特征在于,所述至少一个主开关(208,210)是取决于紧急关闭信号、系统错误信号或所述DC电压充电桩(100;200;300)到地的绝缘来被控制的。
Claims (13)
1.一种用于对电动车充电的DC电压充电桩(100;200;300),包括:
-两个DC电压充电桩输入连接(102,104),用于具有由中央单元提供的第一电压范围的输入DC电压(VE);
-第一DC电压转换器(106;302),用于将所述输入DC电压(VE)转换成具有第二电压范围的输出DC电压(VA);
-两个DC电压充电桩输出连接(108,110),用于将所述输出DC电压(VA)提供给所述电动车;
其特征在于,
所述DC电压充电桩(100;200;300)包括控制单元(112),所述控制单元具有用于所述DC电压充电桩(100;200;300)与所述中央单元之间的通信的第一通信接口(114)。
2.如权利要求1所述的DC电压充电桩(100;200;300),其特征在于,所述控制单元(112)经由所述第一通信接口(114)传送或接收以下信息项中的至少一者:
-所述DC电压充电桩的状态,
-与从所述DC电压充电桩输出的最大功率有关的数据,
-充电能量值,
-充电时间值,
-电动车标识信息,
-软件更新数据。
3.如权利要求1或2所述的DC电压充电桩(100;200;300),其特征在于,所述控制单元在所述第一通信接口(114)处支持串行通信标准,尤其是以太网。
4.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,所述控制单元(112)包括用于所述DC电压充电桩(100;200;300)与所述电动车之间的通信的第二通信接口(214)。
5.如权利要求4所述的DC电压充电桩,其特征在于,所述控制单元(112)在一个充电点处在所述第二通信接口(114)处支持至少两个不同的通信协议(216,218,220)。
6.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,具有第二DC电压转换器(302),其选择性地并联或串联连接到所述第一DC电压转换器(106)。
7.如权利要求5所述的DC电压充电桩,其特征在于,具有第三和第四DC电压转换器(106;302),其中所有DC电压转换器(106;302)选择性地并联或串联连接。
8.如权利要求6或7所述的DC电压充电桩,其特征在于,具有开关矩阵(308),所述开关矩阵与所述控制单元(112)、与每一DC电压转换器(106;302)的至少一个输入连接、以及与所述DC电压充电桩输入连接(102,104)相连接,其中所述控制单元(112)控制所述开关矩阵(308),使得所有DC电压转换器(106;302)并联或串联连接。
9.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,具有连接到所述DC电压充电桩输入连接(102,104)和连接到地的绝缘测量单元(212),其中所述绝缘测量单元(212)测量所述DC电压充电桩(100;200;300)到地的绝缘,并且取决于该测量将所述DC电压充电桩(100;200;300)与所述电动车断开电连接。
10.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,具有功率测量单元(224),所述功率测量单元连接至所述DC电压充电桩输入连接(102,104)并且确定输出到所述电动车的功率和/或充电时间。
11.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,具有温度测量单元,所述温度测量单元被配置成取决于测得的温度来控制所述DC电压充电桩(100;200;300)的功率输出。
12.如前述权利要求中的任一项所述的DC电压充电桩(100;200;300),其特征在于,具有串联连接在所述第一DC电压转换器(106;302)和所述DC电压充电桩输入连接(102,104)之一之间的至少一个主开关(208,210),其中所述主开关(208,210)被配置成将所述第一DC电压转换器(106;302)选择性地连接到所述DC电压充电桩输入连接(102,104)之一或将其与之断开连接。
13.如权利要求12所述的DC电压充电桩(100;200;300),其特征在于,所述至少一个主开关(208,210)是取决于紧急关闭信号、系统错误信号或所述DC电压充电桩(100;200;300)到地的绝缘来被控制的。
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EP18020275.6 | 2018-06-22 | ||
EP18020275.6A EP3587164B1 (de) | 2018-06-22 | 2018-06-22 | System mit zentraleinheit und mehreren gleichspannungsladesäulen zum laden von elektrofahrzuegen |
PCT/EP2019/025191 WO2019242891A1 (de) | 2018-06-22 | 2019-06-21 | Gleichspannungsladesaeule zum laden eines elektrofahrzeugs |
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US20210268925A1 (en) | 2021-09-02 |
EP3587164C0 (de) | 2023-12-20 |
WO2019242891A1 (de) | 2019-12-26 |
US11491886B2 (en) | 2022-11-08 |
EP4353515A1 (de) | 2024-04-17 |
EP3587164B1 (de) | 2023-12-20 |
KR20210024539A (ko) | 2021-03-05 |
EP3587164A1 (de) | 2020-01-01 |
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