CN114537216A - 基于弯道预测的电动车能量管理方法、终端设备及存储介质 - Google Patents
基于弯道预测的电动车能量管理方法、终端设备及存储介质 Download PDFInfo
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Abstract
本发明涉及一种基于弯道预测的电动车能量管理方法、终端设备及存储介质。该方法包括以下步骤:S1.统计车辆减速的平均加速度av;S2.通过电子地平线***获取前方道路的弯道信息;S3.根据弯道信息和车辆的最高过弯速度来预测过弯时的能量回收量;S4.根据预测的过弯能量回收量调整当前行驶的逻辑门限值。本发明的方法能根据前方过弯时可能回收的能量,提前让超级电容多输出能量,以腾出能量回收空间,在过弯时再回收能量,能减少电池的功率输出,保证能量回收,起到减少损耗,节能控制的积极作用。
Description
技术领域
本发明涉及电动车领域,具体地涉及一种基于弯道预测的电动车能量管理方法、终端设备及存储介质。
背景技术
现代纯电动车能量***一般为B+C***(B=动力电池,C=超级电容),能量回收先由充放电效率更高的超级电容完成,而在能量输出管理上,传统的方法是基于逻辑门限规则的能量管理策略,对逻辑门限以下的功率输出需求由锂电池提供,超过逻辑门限的功率输出需求由超级电容提供,这样可以充分利用超级电容适合快速充放电的特性,有效保护锂电池,提高其寿命。但传统的能量管理方法一般都不具有预测性,即没有根据车辆行驶前方路况提前进行能量管理优化。因此,虽然基于逻辑门限规则或其它传统能量管理方法在当前往往是适用的,但对于未来路况不一定是最优的。
发明内容
本发明旨在提供一种基于弯道预测的电动车能量管理方法、终端设备及存储介质,以解决上述问题。为此,本发明采用的具体技术方案如下:
根据本发明的一方面,提供了一种基于弯道预测的电动车能量管理方法,其包括以下步骤:
S1.统计车辆减速的平均加速度av;
S2.通过电子地平线***获取前方道路的弯道信息;
S3.根据所述弯道信息计算车辆的最高过弯速度和预测过弯时的能量回收量;
S4.根据所述能量回收量调整当前行驶的逻辑门限值。
进一步地,S3的具体过程如下:
进一步地,λ在0.4至0.6之间。
进一步地,S4的具体过程为:
S43.将车辆从距离入弯前D米到入弯前D2米这段距离内的逻辑门限调整为PL-P,其中,PL为传统固定逻辑门限。
根据本发明的另一方面,还提供了一种终端设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,其中,所述处理器执行所述计算机程序时实现如上所述方法的步骤。
根据本发明的又一方面,还提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,其特征在于,所述计算机程序被处理器执行时实现如上所述方法的步骤。
本发明采用上述技术方案,具有的有益效果是:本发明的方法能根据前方过弯时可能回收的能量,提前让超级电容多输出能量,以腾出能量回收空间,在过弯时再回收能量,能减少电池的功率输出,保证能量回收,起到减少损耗,节能控制的积极作用。
附图说明
为进一步说明各实施例,本发明提供有附图。这些附图为本发明揭露内容的一部分,其主要用以说明实施例,并可配合说明书的相关描述来解释实施例的运作原理。配合参考这些内容,本领域普通技术人员应能理解其他可能的实施方式以及本发明的优点。图中的组件并未按比例绘制,而类似的组件符号通常用来表示类似的组件。
图1是本发明的一种基于弯道预测的电动车能量管理方法的流程图。
具体实施方式
现结合附图和具体实施方式对本发明进一步说明。
如图1所示,一种基于弯道预测的电动车能量管理方法包括以下步骤:
S2.通过电子地平线***获取前方道路的弯道信息。
S3.根据弯道信息计算车辆的最高过弯速度和预测过弯时的能量回收量。具体过程如下:
S32.预测过弯时的能量回收量。车辆在过弯时,至少会前当前车速v0降低到极限侧滑车速vs以下,因此预测过弯时相对车辆当前车速状态,会减少的动能至少为根据相关的制动能量回收文献,在平均制动强度下,能量回收的效率(即能量回收系数λ)约为0.4~0.6,取平均值约为0.5。因此大概估计减少的动能E可被转化为电能回收量约为0.5E。
获得超级电容当前状态,得到超级电容剩余可存储的能量Er(公知方法,通过超级电容的SOC状态可换算得到)。如果Er<0.5E,说明超级电容剩余空间可能不足以回收进入弯道前因制动而可回收的能量。
S4.根据预测的能量回收量调整当前行驶的逻辑门限值。具体过程如下:
S41.计算理论上开始减速的位置离入弯点的距离D2:
表示离入弯点距离D2时,以平均加速度av从当前车速度v0减速到入弯时的车辆速度至少为最高过弯车速vs。
S43.假设传统固定逻辑门限为PL,因此将车辆从距离入弯前D米到入弯前D2这段距离内的逻辑门限调整为PL-P。这样可以在入弯前更多的靠超级电容输出能量,不仅减少了动力电池的放电,而且使超级电容腾出的空间大约够回收入弯减速的能量;既保护了动力电池,又能取得比较好的整车能耗经济性。
本发明基于电子地平线***获取前方道路弯道的曲率半径并生成预测性的动态逻辑门限值,改变传统固定逻辑门限值不具有预测性最优化能量管理的缺陷,能量管理***按照预测性动态逻辑门限值,通过能量管理策略进行预测性能量管理,对电动车能耗降低和防止电池损耗,提高车辆经济性等能起到积极作用。
在本发明的实施例中,还提供了一种终端设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,其中,所述处理器执行所述计算机程序时实现如上所述方法的步骤S1-S4。
进一步地,该终端设备可以是桌上型计算机、笔记本、掌上电脑及云端服务器等计算设备。该终端设备可包括,但不仅限于,处理器、存储器。本领域技术人员可以理解,上述终端设备的组成结构仅仅是终端设备的示例,并不构成对终端设备的限定,可以包括比上述更多或更少的部件,或者组合某些部件,或者不同的部件,例如终端设备还可以包括输入输出设备、网络接入设备、总线等,本发明实施例对此不做限定。
进一步地,所称处理器可以是中央处理单元(Central Processing Unit,CPU),还可以是其他通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field-Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等,所述处理器是终端设备的控制中心,利用各种接口和线路连接整个终端设备的各个部分。
所述存储器可用于存储所述计算机程序和/或模块,所述处理器通过运行或执行存储在所述存储器内的计算机程序和/或模块,以及调用存储在存储器内的数据,实现的各种功能。所述存储器可主要包括存储程序区和存储数据区,其中,存储程序区可存储操作***、至少一个功能所需的应用程序等。此外,存储器可以包括高速随机存取存储器,还可以包括非易失性存储器,例如硬盘、内存、插接式硬盘,智能存储卡(Smart Media Card,SMC),安全数字(Secure Digital,SD)卡,闪存卡(Flash Card)、至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
本发明实施例还提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序被处理器执行时实现本发明实施例上述方法的步骤S1-S4。
终端设备集成的模块/单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明实现上述实施例方法步骤S1-S4中的全部或部分流程,也可以通过计算机程序来指令相关的硬件来完成,所述的计算机程序可存储于一计算机可读存储介质中,该计算机程序在被处理器执行时,可实现上述各个方法实施例的步骤。其中,所述计算机程序包括计算机程序代码,所述计算机程序代码可以为源代码形式、对象代码形式、可执行文件或某些中间形式等。所述计算机可读介质可以包括:能够携带所述计算机程序代码的任何实体或装置、记录介质、U盘、移动硬盘、磁碟、光盘、计算机存储器、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、电载波信号、电信信号以及软件分发介质等。需要说明的是,所述计算机可读介质包含的内容可以根据司法管辖区内立法和专利实践的要求进行适当的增减,例如在某些司法管辖区,根据立法和专利实践,计算机可读介质不包括电载波信号和电信信号。
尽管结合优选实施方案具体展示和介绍了本发明,但所属领域的技术人员应该明白,在不脱离所附权利要求书所限定的本发明的精神和范围内,在形式上和细节上可以对本发明做出各种变化,均为本发明的保护范围。
Claims (7)
1.一种基于弯道预测的电动车能量管理方法,其特征在于,包括以下步骤:
S1.统计车辆减速的平均加速度av;
S2.通过电子地平线***获取前方道路的弯道信息;
S3.根据所述弯道信息计算车辆的最高过弯速度和预测过弯时的能量回收量;
S4.根据所述能量回收量调整当前行驶的逻辑门限值。
4.如权利要求3所述的方法,其特征在于,λ在0.4至0.6之间。
6.一种终端设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现如权利要求1-5中任一项所述方法的步骤。
7.一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,其特征在于,所述计算机程序被处理器执行时实现如权利要求1-5中任一项所述方法的步骤。
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