CN117480066A - 电动作业车辆的热管理 - Google Patents
电动作业车辆的热管理 Download PDFInfo
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- CN117480066A CN117480066A CN202280042496.1A CN202280042496A CN117480066A CN 117480066 A CN117480066 A CN 117480066A CN 202280042496 A CN202280042496 A CN 202280042496A CN 117480066 A CN117480066 A CN 117480066A
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- 239000012530 fluid Substances 0.000 claims abstract description 141
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000002826 coolant Substances 0.000 claims description 23
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
一种在电动作业车辆连接到充电模块时对电动作业车辆进行优先级管理的方法。基于时间优先级决定(140)使用制动持续时间、目标温度、目标充电状态、最小上升持续时间和最小充电持续时间确定充电开始时间(160)和热交换开始时间(150)。做出时间优先级决定(140),使得第一流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间;实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间;并且实际充电速度低于阈值充电速度。
Description
技术领域
本发明涉及电动作业车辆领域。
背景技术
作业车辆在车辆的各种部件中包含流体,诸如液压油和用于供暖、通风和空调(HVAC)的冷却剂回路。这些流体的温度的管理对于作业车辆的有效操作是关键的。例如,冷的和粘性的液压流体可能导致寄生损失。
为了使作业车辆准备好供操作者使用,车辆必须具有足够的燃料,并且流体优选地接近其最佳作业温度。已知在作业车辆开始作业之前进行流体的热管理。对于柴油动力机器,这种热管理通常需要操作者打开作业车辆并且运行发动机一段时间以通过来自柴油发动机的排热来加热流体。在预热期间,操作者通常在现场但不能作业,并且运行的发动机仅为了产生热量而使用燃料。
准备电动作业车辆以备操作者使用涉及对电动作业车辆充电,这可能是比填充柴油燃料箱更耗时的过程。可能存在有限的可用于时间长度,其中在需要使用电动作业车辆之前对电池充电。此外,电池充电的速度和充电的定时会影响电池的健康。同样优选的是,电动作业车辆中的流体在使用电动作业车辆之前被加热,类似于柴油动力作业车辆中的流体。最佳的流体温度允许诸如电池、马达、逆变器、DC-DC转换器和充电器的部件的更可靠的操作。然而,电动作业车辆不具有与内燃发动机相同的固有排热,因此经由专用加热元件主动地加热流体。
通常,电动作业车辆将在操作者不在时被充电,使得操作者将返回到已充电但冷的电动作业车辆。在开始作业之前,操作者将开始加热流体并且等待流体温度接近它们的最佳作业温度。加热过程可以从电动作业车辆的电池汲取功率。类似于柴油动力车辆,以这种方式加热流体浪费了操作者作业的时间,并且是车辆动力的低效使用。在操作者返回到车辆之前预热流体对于节省时间是优选的,但是存在功率和时间从对电池充电转移的风险。这可能导致电池没有被充分充电以供使用,或者如果以不适当的速度或温度进行充电,则可能导致电池健康恶化。
发明内容
针对该背景技术,提供了一种在电动作业车辆连接到充电模块时对电动作业车辆进行优先级管理的方法。该方法包括确定电动作业车辆的预期开始时间,在预期开始时间处电动车辆预期从充电模块断开,其中预期开始时间用于确定制动持续时间。该方法还包括确定预期使用电动作业车辆的第一流体的预期流体使用时间。该方法还包括在预期流体使用时间处确定第一流体的目标温度。该方法还包括在预期开始时间处确定电池的目标充电状态。该方法还包括确定要从初始温度调节到阈值温度的第一流体的实际温度的最小上升持续时间。该方法还包括确定将以第一充电速度从初始充电状态充电到阈值充电状态的电池的最小充电持续时间。该方法还包括使用制动持续时间、目标温度、目标充电状态、最小上升持续时间和最小充电持续时间来基于时间优先级决定确定充电开始时间和热交换开始时间。该方法还包括在充电开始时间处以第一充电速度启动对电池充电,并且在热交换开始时间处启动调节第一流体的第一温度。做出时间优先级决定,使得第一流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间,实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
还提供了一种电动作业车辆,该电动作业车辆包括优先级控制器,该优先级控制器经配置在使用电动作业车辆之前执行电动作业车辆的热管理,同时电动作业车辆被连接到充电模块。优先级控制器经配置确定电动作业车辆的预期开始时间,在该预期开始时间电动车辆被预期从充电模块断开,其中该预期开始时间被用于确定制动持续时间。优先级控制器还经配置确定预期使用电动作业车辆的第一流体的预期流体使用时间。优先级控制器还经配置在预期流体使用时间处确定第一流体的目标温度。优先级控制器还经配置在预期开始时间处确定电池的目标充电状态。优先级控制器还经配置确定要从初始温度调节到阈值温度的第一流体的实际温度的最小上升持续时间。优先级控制器还经配置确定将以第一充电速度从初始充电状态充电到阈值充电状态的电池的最小充电持续时间。优先级控制器还经配置基于时间优先级决定使用制动持续时间、目标温度、目标充电状态、最小上升持续时间和最小充电持续时间确定充电开始时间和热交换开始时间。优先级控制器还经配置在充电开始时间处以第一充电速度启动对电池的充电,并且在热交换开始时间处启动对第一流体的第一温度的调节。做出时间优先级决定,使得第一流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间,实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
这样,制动持续时间可以用于准备电动作业车辆以准备使用。可以做出时间优先级决定以确保电池在预期开始时间处被充分充电并且第一流体在预期流体使用时间处被充分加热。
附图说明
现在将参照附图仅以示例的方式描述本发明的实施例,其中:
图1是示出根据本发明的实施例的电动作业车辆的优先级管理方法的流程图。
图2是示出根据本发明的实施例的电动作业车辆的优先级管理方法的流程图。
具体实施方式
根据本发明的实施例,提供了一种在电动作业车辆连接到充电模块时对电动作业车辆进行优先级管理的方法。确定电动作业车辆的预期开始时间,在预期开始时间处,电动车辆预期从充电模块断开。预期开始时间可以是预期电动作业车辆的用户返回作业并且使用电动作业车辆的时间。预期开始时间用于确定电动作业车辆的制动持续时间。制动持续时间可以是准备电动作业车辆以准备使用的可用于时间。可以做出关于如何最佳地使用制动持续时间的时间优先级决定,使得电动作业车辆准备在预期开始时间处使用。为了准备使用,电动作业车辆应该经充分充电并且其流体应该接近适当的温度。为了实现这一点,可以调节充电时间、加热时间和充电速度中的至少一个。
电动作业车辆可以包括电池,对于该电池确定在预期开始时间处的目标充电状态。目标充电状态可以是在预期开始时间处的期望充电状态,并且可以高于阈值充电状态。阈值充电状态可以是高于其可以使用电动作业车辆的充电状态。确定最小充电持续时间,其中最小充电持续时间是将电池以第一充电速度从初始充电状态充电到阈值充电状态所花费的时间。确定预期流体使用时间,在该时间预期使用电动作业车辆的第一流体,并且确定第一流体在预期流体使用时间处的目标温度。目标温度可以是在预期开始时间处的期望温度,并且可以与可以使用第一流体的阈值温度不同。对于要从初始温度调节到阈值温度的第一流体的实际温度,确定最小上升持续时间。
基于时间优先级决定,然后使用制动持续时间、目标温度、目标充电状态、最小上升持续时间和最小充电持续时间确定充电开始时间和热交换开始时间。在充电开始时间处以第一充电速度启动对电池充电,并且在热交换开始时间处启动调节第一流体的第一温度。做出时间优先级决定,使得第一流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间,实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
图1示出了根据本发明的实施例的电动作业车辆的优先级管理方法。车辆使用信息110、温度信息120和充电信息130可以用于做出时间优先级决定140。时间优先级决定140在步骤150确定热交换开始时间,并且在步骤160确定充电开始时间。在热交换开始时间处启动热交换(步骤170),并且在充电开始时间处启动充电(步骤180)。
参照图2,车辆使用信息110可以包括预期开始时间211和预期流体使用时间212。温度信息120可以包括最小上升持续时间221、目标温度222和阈值温度223。最小上升持续时间221可以使用阈值温度223、初始温度224和第一热交换速度225确定。充电信息130可以包括最小充电持续时间231、目标充电状态232和阈值充电状态233。最小充电持续时间可以使用阈值充电状态233、初始充电状态234和第一充电速度235确定。
在实施例中,第一流体的上升持续时间可以基于可用的总热量输入、热量损失的估计、第一流体的特性和流体将被加热到的第一温度来确定。总热量输入可以从加热器的特性计算,该特性包括加热器功率、加热器效率和加热器功率管理限制中的至少一个。可以从第一流体的温度和环境温度估计热量损失。第一流体的特性可以包括第一流体体积和第一流体比热容。
在实施例中,加热器可以直接从充电模块(而不是从电池)汲取功率。加热器功率管理限制可以基于电池的充电状态、电池的电流限制和充电模块电源容量来确定。
在另一个实施例中,优先级管理的方法还可以包括功率优先级决定。在加热器和充电模块正从同一电源汲取功率的情况下,可以做出功率优先级决定,使得第一流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间,实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
上述实施例做出关于第一流体的热交换和电池充电的时间优先级决定。时间优先级决定可以与多种流体的热交换和电池的充电有关。对于多种流体可以存在多个预期流体使用时间。例如,电动作业车辆可以包括液压油;电池冷却剂回路;加热、通风和空调(HVAC)冷却剂回路以及马达或逆变器冷却剂回路中的一个或多个。可以做出时间优先级决定,使得对于多种流体中的每一种,流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间。还可以做出时间优先级决定,使得实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
在做出功率优先级决定的情况下,可以做出与多种流体的热交换和电池的充电有关的功率优先级决定。可以做出功率优先级决定,使得对于多种流体中的每一种,流体的实际温度在预期流体使用时间处在阈值温度和目标温度之间。还可以做出功率优先级决定,使得实际充电状态在预期开始时间处在阈值充电状态和目标充电状态之间,并且实际充电速度低于阈值充电速度。
在实施例中,用于多种流体的热交换可以经由主冷却剂回路进行。主冷却剂回路可以包括经由阀连接到主冷却剂回路的多个副冷却剂回路。可以使用单个加热器。在另一个实施例中,用于多种流体的热交换可以经由多个分开的冷却剂回路和/或多个加热器来进行。冷却剂回路可以用于增加或降低流体的温度。
在实施例中,可以为多种流体中的每一种确定多个上升持续时间。多个上升持续时间中最长的上升持续时间可以用于时间优先级决定和功率优先级决定中的至少一个,以确定主热交换开始时间。主热交换开始时间和多个上升持续时间可以用于确定每个其它流体的多个副热交换开始时间。对应于多个上升持续时间中最长的上升持续时间的流体的加热可以在主热交换开始时间处启动。每个其它流体的加热可以在每个副热交换开始时间处启动。在用于多种流体的热交换经由包括副冷却剂回路的主冷却剂回路进行的情况下,每种流体可以由副冷却剂回路加热,其中副冷却剂回路在对应于该流体的副热交换开始时间处经由一个或多个阀连接到主冷却剂回路。
在用于多种流体的热交换可以经由多个单独的冷却剂回路和/或多个加热器进行的情况下,可以做出进一步的功率优先级决定以确定可以同时加热多少流体。在不是所有的多种流体可以同时加热的情况下,多种流体中的一种或多种可以在预期流体使用时间之前达到在阈值温度和目标温度之间的最终温度。实际温度可以保持在最终温度处直到预期流体使用时间。当确定阈值温度时,可以考虑在流体已经达到最终温度之后到环境的热量损失。
在实施例中,多种流体可以被分配多个等级。时间优先级决定和功率优先级决定中的至少一个可以基于多个等级,使得具有较高等级的流体的热交换优先于具有较低等级的流体的热交换。
阈值充电状态可以包括电动作业车辆用于下一作业时段所需的电池的充电状态。阈值充电状态可以包括电动作业车辆用于下一作业时段并且返回到充电模块所需的电池的充电状态。阈值充电状态可以是预定值,或者可以基于电动作业车辆的先前使用数据确定。
预期流体使用时间可以包括特定时间,或者可以包括与其它预期流体使用时间、充电开始时间或预期的返回作业时间相比的顺序。例如,可以在充电开始时间之前或在预期的返回作业时间之前加热流体。
在实施例中,可以加热第一流体以便在充电之前加热电池。在该实施例中,第一流体的预期流体使用时间可以在充电开始时间之前或之时。在充电开始时间之后,可能存在具有预期流体使用时间的其它流体。第一流体和其它流体的热交换开始时间可以由时间优先级决定确定。
在实施例中,多种流体可以具有不同的预期流体使用时间。多种流体可以经由主冷却剂回路或经由多个冷却剂回路或多个加热器被加热。一个或多个冷却剂回路或加热器可以在第一热交换开始时间处启动第一流体的热交换,并且在第一流体的第一预期流体使用时间之后停止热交换。一个或多个冷却剂回路或加热器可以在第二热交换开始时间处重新开始第二流体的热交换,并且在第二流体的第二预期流体使用时间之后停止热交换。在另一个实施例中,一个或多个冷却剂回路或加热器可以在第一预期流体使用时间之后将第一流体的温度保持在第一预期流体使用时间处达到的温度值。在另一个实施例中,第二热交换开始时间可以在第一预期流体使用时间之前,使得用于第一流体的热交换和用于第二流体的热交换重叠。
Claims (14)
1.一种在电动作业车辆连接到充电模块时对电动作业车辆进行优先级管理的方法,其中所述方法包括:
确定:
所述电动作业车辆的预期开始时间,在所述预期开始时间处所述电动车辆预期从所述充电模块断开,其中所述预期开始时间用于确定制动持续时间;
预期使用所述电动作业车辆的第一流体的预期流体使用时间;
在所述预期流体使用时间处的第一流体的目标温度;
在所述预期开始时间处的电池的目标充电状态;
要从初始温度调节到阈值温度的所述第一流体的实际温度的最小上升持续时间;以及
将以第一充电速度从初始充电状态充电到阈值充电状态的所述电池的最小充电持续时间;
使用所述制动持续时间、所述目标温度、所述目标充电状态、所述最小上升持续时间和所述最小充电持续时间来基于时间优先级决定确定充电开始时间和热交换开始时间;以及
在所述充电开始时间处以第一充电速度启动对所述电池充电,并且在所述热交换开始时间处启动调节所述第一流体的所述第一温度;
其中做出所述时间优先级决定,使得:
所述第一流体的所述实际温度在所述预期流体使用时间处在所述阈值温度和所述目标温度之间;
实际充电状态在所述预期开始时间处在所述阈值充电状态和所述目标充电状态之间;并且
实际充电速度低于阈值充电速度。
2.根据权利要求1所述的方法,其中所述阈值充电状态是所述目标充电状态值的充电百分比。
3.根据权利要求1所述的方法,其中所述阈值温度是所述第一目标温度的温度百分比。
4.根据权利要求1所述的方法,其中基于所述制动持续时间确定所述阈值充电速度。
5.根据权利要求1所述的方法,其中从所述电动作业车辆的多种流体达到多个阈值温度的多个上升持续时间中选择最小上升持续时间。
6.根据权利要求5所述的方法,其中所述多种流体被分配多个等级,并且其中基于第一等级选择所述第一流体的所述最小上升持续时间。
7.根据权利要求1所述的方法,其中所述第一流体的所述第一上升持续时间是基于以下各项中的至少一项确定的:
所述第一流体的第一初始温度;
所述第一目标温度;
所述第一热量输入值;
所述第一流体的第一体积;以及
所述第一流体的第一流体比热容。
8.根据权利要求7所述的方法,其中所述第一流体的所述第一上升持续时间还基于从环境温度计算的第一热量损失估计确定。
9.根据权利要求7所述的方法,其中所述第一热量输入值是基于以下各项确定的:
第一加热器功率;以及
第一加热器效率。
10.根据权利要求1所述的方法,还包括:
确定:
将所述第一流体调节到所述第一目标温度所需的第一功率;
所述电动作业车辆的电池达到目标充电状态值所需的充电功率;以及
可用的功率;
做出功率优先级决定,使得:
所述第一流体的所述实际温度在所述预期流体使用时间处在所述阈值温度和所述目标温度之间;
实际充电状态在所述预期开始时间处在所述阈值充电状态和所述目标充电状态之间;并且
实际充电速度低于阈值充电。
11.根据权利要求2所述的方法,还包括经由单个冷却剂回路调节所述多种流体的多个温度。
12.根据权利要求2所述的方法,还包括经由多个冷却剂回路调节所述多种流体的多个温度。
13.根据前述权利要求中任一项所述的方法,其中所述第一流体使用时间在所述充电开始时间之前或之时。
14.一种电动作业车辆,包括优先级控制器,其经配置在使用所述电动作业车辆之前执行所述电动作业车辆的热管理,同时所述电动作业车辆被连接到充电模块,其中所述优先级控制器经配置:
确定:
所述电动作业车辆的预期开始时间,在所述预期开始时间处所述电动车辆预期从所述充电模块断开,其中所述预期开始时间用于确定制动持续时间;
预期使用所述电动作业车辆的第一流体的预期流体使用时间;
在所述预期流体使用时间处的第一流体的目标温度;
在所述预期开始时间处的电池的目标充电状态;
要从初始温度调节到阈值温度的所述第一流体的实际温度的最小上升持续时间;以及
将以第一充电速度从初始充电状态充电到阈值充电状态的所述电池的最小充电持续时间;
基于时间优先级决定使用所述制动持续时间、所述目标温度、所述目标充电状态、所述最小上升持续时间和所述最小充电持续时间确定充电开始时间和热交换开始时间;以及
在所述充电开始时间处以第一充电速度启动对所述电池的充电,并且在所述热交换开始时间处启动对所述第一流体的所述第一温度的调节;
其中做出所述时间优先级决定,使得:
所述第一流体的所述实际温度在所述预期流体使用时间处在所述阈值温度和所述目标温度之间;
实际充电状态在所述预期开始时间处在所述阈值充电状态和所述目标充电状态之间;并且
实际充电速度低于阈值充电速度。
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