CN108725203B - 在检测到辅助电池故障的情况下维持高电压电池充电的***和方法 - Google Patents
在检测到辅助电池故障的情况下维持高电压电池充电的***和方法 Download PDFInfo
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Abstract
一种使用配置为通过安装软件、固件、硬件、或其组合来执行特定操作的计算机的***。一个方面包括编程为从辅助电池传感器接收故障信号的***。***还确定低电压设定点是否大于主电池电压,并且如果低电压设定点大于主电池电压值,则将开路开关信号发送到电池隔离开关。***将辅助设定点信号发送到辅助电池充电器以保持低电压。***将从辅助电池传感器接收电流信号以指示辅助电池电流值。***还确定辅助电池电流是否高于最大电流值,并向辅助电池充电器发送禁用辅助电池维持信号。
Description
技术领域
本发明大体涉及电池充电,并且更具体地,涉及在检测到辅助电池故障的情况下维持高电压电池充电的***和方法。
背景技术
电动车辆在现有技术中是已知的。这种车辆的两种常见变体包括:纯电动车辆,又称为具有可充电电池和用于驱动车轮的电动马达的电池电动车辆(BEV)。另一种类型的车辆是插电式混合动力电动车辆(PHEV),其包括用于将动力传递到车辆的车轮的电动马达和内燃发动机驱动能力的组合。
对于BEV和PHEV两者来说,一个共同的问题是对具有多个低电压
(LV)电池的PHEV和BEV车辆的不完全高电压(HV)充电。LV电池通常是连接到车辆的低电压***的12.6伏的铅酸电池,但LV电池可以使用任何的电池化学成分。当在一个或多个LV电池中检测到故障时,对HV电池的充电提前停止。提前停止对HV充电也通常会发生在LV***检测到一个或多个LV电池出现故障时。当12.6伏电池出现问题时会发生这种情况,例如过热或电池板接触并短路电池内的电池单元。
因此,当一个或多个LV电池发生故障时,需要特别处理低电压***。
发明内容
一种***包括具有处理器和存储器的计算机。存储处理器可执行的指令的存储器使得计算机编程为从可通信地连接到电池的电池传感器接收故障信号。该***从可通信地连接到主电池的电压传感器接收电压信号,其中电压信号指示主电池电压值并且确定低电压设定点值是否大于主电池电压值。如果低电压设定点大于主电池电压值,则***向电池隔离开关发送开路开关信号,并且向辅助电池充电器发送辅助设定点信号,以在电动车辆(EV)的低电压总线上维持低电压值。该***从可通信地连接到辅助电池的辅助电池电流传感器接收电流信号,其中电流信号指示辅助电池电流值。然后***将确定辅助电池电流值是否高于辅助电池最大电流值,并向辅助电池充电器发送禁用辅助电池维持信号。本发明的这些和其它目的将由以下对优选实施例的描述而变得更加明显。
根据本发明,提供一种电动车辆(EV)辅助电池电流故障***,包括:
电池维护电子控制单元(ECU);
可通信地连接到辅助电池和电池维护ECU的辅助电池传感器;
可通信地连接到主电池和电池维护ECU的电压传感器;
电池隔离开关;
低电压总线,低电压总线可通信地连接到主电池、辅助电池、电池隔离开关、以及DC至DC转换器中的至少一个;和
可通信地连接到辅助电池和电池维护ECU的辅助电池传感器和控制器。
根据本发明的一个实施例,***还包括二极管,二极管可通信地连接到电池隔离开关,以防止主电池在电池隔离开关打开时放电。
根据本发明的一个实施例,DC至DC转换器将高电压转换为低电压。
根据本发明的一个实施例,电池维护ECU还包括处理器和存储器。
根据本发明的一个实施例,电池维护ECU可通信地连接到EV的网络。
根据本发明的一个实施例,网络是控制器局域网(CAN)总线。
根据本发明的一个实施例,辅助电池传感器和控制器包括用于确定故障信号的安培传感器、温度传感器、电压传感器、和计时器传感器中的至少一个。
根据本发明,提供一种***,包括具有处理器和存储器的计算机,存储器存储可由处理器执行使得计算机编程为执行以下步骤的指令:
从可通信地连接到辅助电池的辅助电池传感器和控制器接收故障信号;
从可通信地连接到主电池的电压传感器接收电压信号,其中电压信号指示主电池电压值;
确定低电压设定点值是否大于主电池电压值;
如果低电压设定点大于主电池电压值,则向电池隔离开关发送开路开关信号;
将辅助设定点信号发送到辅助电池充电器以在电动车辆(EV)的低电压总线上保持低电压值;
从可通信地连接到辅助电池的辅助电池电流传感器接收电流信号,
其中电流信号指示辅助电池电流值;
确定辅助电池电流值是否高于辅助电池最大电流值;并且
向辅助电池充电器发送禁用辅助电池维持信号。
根据本发明的一个实施例,***还包括二极管,二极管可通信地连接到电池隔离开关,以防止主电池在电池隔离开关打开时放电。
根据本发明的一个实施例,高电压(HV)电池在辅助电池充电器被禁用时继续充电。
根据本发明的一个实施例,处理器和存储器位于电池充电计算机中。
根据本发明的一个实施例,电池充电计算机可通信地连接到EV的网络。
根据本发明的一个实施例,网络是控制器局域网(CAN)总线。
根据本发明的一个实施例,辅助电池传感器和控制器包括用于确定故障信号的安培传感器、温度传感器、电压传感器、和计时器传感器中的至少一个。
根据本发明,提供一种方法,包括:
从可通信地连接到辅助电池的辅助电池传感器和控制器接收故障信号;
从可通信地连接到主电池的电压传感器接收电压信号,其中电压信号指示主电池电压值;
确定低电压设定点值是否大于主电池电压值;
如果低电压设定点大于主电池电压值,则向电池隔离开关发送开路开关信号;
将辅助设定点信号发送到辅助电池充电器以在电动车辆(EV)的低电压总线上保持低电压值;
从可通信地连接到辅助电池的辅助电池电流传感器接收电流信号,
其中电流信号指示辅助电池电流值;
确定辅助电池电流值是否高于辅助电池最大电流值;并且
向辅助电池充电器发送禁用辅助电池维持信号。
根据本发明的一个实施例,方法还包括:利用可通信地连接到电池隔离开关的二极管来防止主电池在电池隔离开关打开时放电。
根据本发明的一个实施例,方法还包括在辅助电池充电器被禁用时继续对高电压(HV)电池进行充电。
根据本发明的一个实施例,处理器和存储器位于电池充电计算机中。
根据本发明的一个实施例,电池充电计算机可通信地连接到EV的控制器局域网(CAN)总线。
根据本发明的一个实施例,方法还包括从用于确定故障信号的安培传感器、温度传感器、电压传感器、和计时器传感器中的至少一个来确定故障信号。
附图说明
图1是电动车辆(EV)电池***的简化示意图;
图2是示例性EV***总线和相关电子控制单元(ECU)的框图;
图3是可以在图1的***的计算机和相关硬件部件中实现的示例性过程的流程图。
具体实施方式
参考附图,其中相同的附图标记在几个视图中表示相同的部件,图1示出了电动车辆(EV)辅助电池电流故障***10的简化示意图。高电压(HV)电池22可通信地连接到直流(DC)到DC转换器20的输入端。HV电池22还可通信地连接到HV插座32,以在EV要充电时允许EV***。DC到DC转换器20可以是将DC电源从一个电压电平转换到另一个电压电平的电子电路。例如,HV电池22可以是150伏电池组,并且DC至DC转换器20将150伏转换为(如附接到EV的低电压总线24的元件所需求的)大约12.6-13.8伏。换句话说,DC到DC转换器20将高电压转换为低电压。
连接到总线24的一个这种元件是辅助电池16,并且辅助电池传感器和控制器18可通信地连接到总线24和辅助电池16。辅助电池传感器和控制器18可以包括安培传感器(电流)、温度传感器、电压传感器、和计时器传感器。另外,辅助电池传感器和控制器18可以控制辅助电池16的充电和放电。
总线24还可通信地连接到配件组14。配件组14可以包括无线电、供暖和空调控制器、照明***等以及其它。
二极管26和电池隔离电路(BIC)28位于配件组14和主电池12之间,并且也位于总线24上。尽管未示出,但电压传感器可以可通信地连接到主电池12,以向如图2所示的电池维护ECU 54发送电压信号。
如果未检测到故障,则BIC 28通常闭合并且因此绕过二极管26。当检测到故障时,BIC 28打开并且二极管26防止主电池12通过故障辅助电池16放电。在EV是PHEV的情况下,位于总线24上的还有起动马达30。
如图2所示,各种车辆模块和/或电子控制单元(ECU)可以彼此可通信地连接,以及与车辆控制计算机52可通信地连接。车辆控制计算机52可以包括编程以监视和控制各种车辆模块和ECU以及任何其它车辆部件。
车辆控制计算机52、电池维护ECU 54、以及下面讨论的其它ECU和模块可以具有至少一个处理器并且通常具有存储器,例如包括各种类型的永久和瞬态存储器(例如已知的用于存储计算机指令、寄存器值、以及临时和永久变量的永久和瞬态存储器)。此外,ECU和模块通常可以包括用于交换数据的指令(例如发送和接收车辆的驾驶者或操作者的数据)。例如,通过移动设备、智能电话、便携式计算机、用户设备、和/或车辆内的人机界面,其可以是交互式语音应答(IVR)***、包括触摸屏等的图形用户界面(GUI)等中的一个或多个。
电池维护ECU 54通常通过车辆网络连接到其它模块。一个例子是已知的控制器局域网(CAN)总线。其它有线和无线通信可以被包括在车辆网络中,例如以太网、无线保真(Wi-Fi)等。此外,车辆可以如下所述地与其它网络或车辆通信,并且可以包括无线联网技术,例如蜂窝、 近场通信(NFC)、有线和/或无线分组网络等。
导航ECU 62可以接收例如来自全球导航卫星***(GNSS)的信号来确定车辆的位置。导航ECU 62还可以规划到达目的地(例如乘坐者的拾取位置)的路线,并且将路线建议(turn by turn)指令发送到车辆控制计算机52来实施路线建议。
推进ECU 60可以监视和控制发动机和马达以及车辆的动力传动***。在当前情况下,推进***可以包括具有内燃发动机和/或电动马达的动力传动***等。
提供远程信息处理单元58等,用于向远程网络(未示出)发送和接收信息以允许车辆通过全球移动通信***(GSM)、通用分组无线业务(GPRS)、Wi-Fi、全球微波接入互操作性(WiMAX)、或长期演进(4GLTE)技术与网络(例如互联网)进行移动通信。
制动ECU 64可以监测和控制车辆的制动器以及影响车辆停止的任何参数。例如,当前向传感器检测到车辆前方的物体时,制动ECU 64可以通过激活固定到车辆的车轮和车轴的制动装置使车辆停止或减速。
通信和娱乐ECU 56可以提供车辆对外部网络(例如蜂窝网络或因特网)的访问。通信和娱乐ECU 56还可以为乘客提供车内娱乐***(例如卫星广播或电影播放器)。
工艺流程
图3是示出可以根据电池维护ECU 54中的编程执行以检测电池故障并隔离故障电池并保持HV充电的示例性过程100的流程图。
过程100从框110开始,在框110中电池维护ECU 54从辅助电池传感器和控制器18接收到故障信号。故障信号可以从辅助电池传感器和控制器18中推送并且触发电池维护ECU 54中的中断,或者可替代地,电池维护ECU 54可以轮询辅助电池传感器和控制器18是否存在故障。
接下来在框115中,电池维护ECU 54根据故障信号确定辅助电池16是否存在故障。如果检测到故障,则接下来执行框125。如果未检测到故障,则接下来执行框120。
在框120中,电池维护ECU 54将不会改变EV电池***10的任何参数,并且过程100返回到框110。
在框125中,电池维护ECU 54确定低电压设定点(LVSP)值是否大于主电池电压值。LVSP的电压值低于主电池12的标称电压值,例如LVSP可以设定为12.0伏,并且主电池的标称值通常在12.6伏到13.8伏之间。因此总线24的电压值应该是相应的12.6伏到13.8伏。一旦电池维护ECU 54确定LVSP值大于总线24的电压或主电池电压,则过程100接下来继续执行框125。如果LVSP值不大于总线24的电压或主电池电压,则过程100接下来继续执行框135。
在框130中,指示BIC关闭(如果尚未关闭的话),并使得主电池12充电或继续充电,并且过程100接下来继续执行框140。
在框135中,打开BIC以防止主电池放电,并且过程100接下来继续执行框140。
在可以从框130或框135进入的框140中,电池维护ECU 54将设置设定点(SP)值,SP值将总线24或主电池12保持在大约12.0伏特到13.8伏特,以将各种汽车配件维持在其正常操作电压。电池维护ECU 54可以可选地试图通过辅助电池传感器和控制器18维持流过辅助电池16的零电流。过程100接下来继续执行框145。
在可以从框140或框150进入的框145中,辅助电池传感器和控制器18测量流过辅助电池16的电流。辅助电池传感器和控制器18向电池维护ECU 54发送电流信号,并且过程100接下来继续执行框150。
在框150中,电池维护ECU 54确定流入或流出辅助电池的电流是否高于辅助电池最大电流值。在一种情况下,流向辅助电池的电流为50安培并且辅助电池最大电流值为25安培。在这种情况下,过程100接下来继续执行框155。如果流向辅助电池的电流是20安培并且辅助电池最大电流值是25安培,则过程100将返回框145。
在框155中,电池维护ECU 54将使电流停止流向辅助电池16,例如电池维护ECU 54将指示辅助电池传感器和控制器18停止对辅助电池充电。可替代地,电池维护ECU 54将通过打开辅助电池16与总线24之间的电路路径来指示辅助电池传感器和控制器18完全分离辅助电池16。
结论
在本文中,用来修饰形容词的副词“大体”是指,由于材料、加工、制造、传感器测量、计算、处理时间、通讯时间等方面的不完善,形状、结构、测量、数值、计算等可以偏离精确描述的几何形状、距离、测量值、值、计算等。
例如本文所描述的那些计算设备通常各自包括可由一个或多个计算设备(例如上述确定的那些计算设备)执行的指令,并且执行上述过程的框或步骤。计算机可执行指令可以由使用各种编程语言和/或技术(包括但不限于单独使用或组合使用的JavaTM、C、C++、C#、Visual Basic、Python、Java Script、Perl、HTML、PHP等)创建的计算机程序进行编译或解释。通常,处理器(例如微处理器)例如从存储器、计算机可读介质等处接收指令并执行这些指令,从而执行包括本文所述的一个或多个步骤的一个或多个过程。可以使用各种计算机可读介质来存储并发送这种指令和其它数据。计算设备中的文件通常是存储在计算机可读介质上的数据集合,例如存储装置介质、随机存取存储器等。
计算机可读介质包括参与提供可由计算机读取的数据(例如指令)的任何介质。这种介质可以采取许多形式,包括但不限于非易失性介质、易失性介质等。非易失性介质包括例如光盘或磁盘、以及其它持久存储器。易失性介质包括通常构成主存储器的动态随机存取存储器(DRAM)。计算机可读介质的常见形式包括例如软盘、可折叠磁盘、硬盘、磁带、任何其它磁介质、CD-ROM、DVD、任何其它光学介质、穿孔卡片、纸带、任何其它设有孔的物理介质、RAM、PROM(可编程只读存储器)、EPROM(可擦可编程只读存储器)、闪存EEPROM(电可擦可编程只读存储器)、任何其它存储器芯片或盒式磁盘、或计算机可读取的任何其它介质。
关于本文所述的媒介、过程、***、方法等应当理解,尽管已经将这些过程的步骤等描述为根据某个有序序列发生,但是可以使用除本文所述的顺序之外的顺序来执行描述的步骤来实施这些过程。还应当理解,可以同时执行某些步骤,可以添加其它步骤,或者可以省略本文描述的某些步骤。换言之,出于说明某些实施例的目的而提供本文的***和/或过程描述,并且不应将其解释为限制所公开的主题。
因此应当理解,上述描述旨在说明而非限制。在阅读上述描述之后,除所提供的实施例之外的许多实施例和应用对本领域技术人员而言将是显而易见的。本发明获得权利的范围不应该是参考上述描述确定,而应该参照所附权利要求和基于本发明的非临时专利申请中包括的权利要求、以及这些权利要求的等同物的全部范围来确定。可以预计和意在将在本文讨论的领域中发生的未来的发展,并且所公开的***和方法将并入到未来的实施例中。总之应该理解,所公开的主题能够修改和变化。
Claims (14)
1.一种电动车辆(EV)辅助电池电流故障***,包括:
电池维护电子控制单元(ECU);
可通信地连接到主电池和所述电池维护电子控制单元的电压传感器;
电池隔离开关;
低电压总线,所述低电压总线可通信地连接到所述主电池、所述辅助电池、所述电池隔离开关、以及DC至DC转换器中的至少一个;
可通信地连接到所述辅助电池和所述电池维护电子控制单元的辅助电池传感器和控制器;以及
二极管,所述二极管可通信地连接到所述电池隔离开关,以防止所述主电池在所述电池隔离开关打开时放电。
2.根据权利要求1所述的***,其中所述DC至DC转换器将高电压转换为低电压。
3.根据权利要求1所述的***,其中所述电池维护电子控制单元还包括处理器和存储器。
4.根据权利要求3所述的***,其中所述电池维护电子控制单元可通信地连接到所述电动车辆的网络,并且其中所述网络是控制器局域网(CAN)总线。
5.根据权利要求1所述的***,其中所述辅助电池传感器和控制器包括用于确定故障信号的安培传感器、温度传感器、电压传感器、和计时器传感器中的至少一个。
6.一种用于电动车辆(EV)的***,包括具有处理器和存储器的计算机,所述存储器存储可由所述处理器执行使得所述计算机编程为执行以下步骤的指令:
从可通信地连接到辅助电池的辅助电池传感器和控制器接收故障信号;
从可通信地连接到主电池的电压传感器接收电压信号,其中所述电压信号指示主电池电压值;
确定低电压设定点值是否大于所述主电池电压值;
如果所述低电压设定点大于所述主电池电压值,则向电池隔离开关发送开路开关信号;
将辅助设定点信号发送到辅助电池充电器以在电动车辆(EV)的低电压总线上保持低电压值;
从可通信地连接到所述辅助电池的辅助电池电流传感器接收电流信号,其中所述电流信号指示辅助电池电流值;
确定所述辅助电池电流值是否高于辅助电池最大电流值;并且
向所述辅助电池充电器发送禁用辅助电池维持信号。
7.根据权利要求6所述的***,还包括二极管,所述二极管可通信地连接到所述电池隔离开关,以防止所述主电池在所述电池隔离开关打开时放电。
8.根据权利要求6所述的***,其中高电压(HV)电池在所述辅助电池充电器被禁用时继续充电。
9.根据权利要求6所述的***,其中所述处理器和所述存储器位于电池充电计算机中,并且其中所述电池充电计算机可通信地连接到所述电动车辆的网络。
10.根据权利要求9所述的***,其中所述网络是控制器局域网(CAN)总线。
11.一种用于电动车辆(EV)的方法,包括:
从可通信地连接到辅助电池的辅助电池传感器和控制器接收故障信号;
从可通信地连接到主电池的电压传感器接收电压信号,其中所述电压信号指示主电池电压值;
确定低电压设定点值是否大于所述主电池电压值;
如果所述低电压设定点大于所述主电池电压值,则向电池隔离开关发送开路开关信号;
将辅助设定点信号发送到辅助电池充电器以在电动车辆(EV)的低电压总线上保持低电压值;
从可通信地连接到所述辅助电池的辅助电池电流传感器接收电流信号,其中所述电流信号指示辅助电池电流值;
确定所述辅助电池电流值是否高于辅助电池最大电流值;并且
向所述辅助电池充电器发送禁用辅助电池维持信号。
12.根据权利要求11所述的方法,还包括:利用可通信地连接到所述电池隔离开关的二极管来防止所述主电池在所述电池隔离开关打开时放电。
13.根据权利要求11所述的方法,其中处理器和存储器位于电池充电计算机中,并且其中所述电池充电计算机可通信地连接到所述电动车辆的控制器局域网(CAN)总线。
14.根据权利要求11所述的方法,还包括从用于确定所述故障信号的安培传感器、温度传感器、电压传感器、和计时器传感器中的至少一个来确定所述故障信号。
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2017
- 2017-04-18 US US15/490,448 patent/US10112487B1/en active Active
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- 2018-04-16 CN CN201810338341.8A patent/CN108725203B/zh active Active
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US10112487B1 (en) | 2018-10-30 |
US20180297474A1 (en) | 2018-10-18 |
DE102018109007A1 (de) | 2018-10-18 |
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