CN116552331A - 电池温度调节系统 - Google Patents
电池温度调节系统 Download PDFInfo
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- CN116552331A CN116552331A CN202310081142.4A CN202310081142A CN116552331A CN 116552331 A CN116552331 A CN 116552331A CN 202310081142 A CN202310081142 A CN 202310081142A CN 116552331 A CN116552331 A CN 116552331A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 72
- 239000003507 refrigerant Substances 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 10
- 238000004378 air conditioning Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本发明提供一种能够在不损害便利性的情况下预先避免对电池的输出进行限制的电池温度调节系统。电池温度调节系统(10)的控制装置(20)具备行驶预定计划获取部(23)、通常电池冷却控制计划部(25)和电池温度调节计划制定部(26)。在预测到通常电池冷却控制中的预测电池温度超过规定温度的过冲将要发生时,电池温度调节计划制定部(26)导出使电池(BAT)的温度变为规定温度以下所需的电池温度调节量,根据电池温度调节电路(19)的温度调节能力,在过冲发生之前分配该电池温度调节量。
Description
技术领域
本发明涉及一种搭载在车辆上的电池温度调节系统。
背景技术
近年来,作为针对地球的气候变动的具体对策,实现低碳社会或者脱碳社会的努力正变得活跃。对于车辆,也强烈要求CO2排放量的削减和能源效率的提高,驱动源的电动化正在飞速发展。具体而言,正在推进电动汽车(Electrical Vehicle)或者混合动力电动汽车(Hybrid Electrical Vehicle)这样的具备以下部件的车辆的开发:作为车辆的驱动源的电动机;以及作为二次电池的电池,其能够向该电动机供给电力。
在这样的车辆中,能够进行与外部电源连接而对电池进行充电的普通充电、和流通比普通充电大的电流以对电池进行充电的快速充电(例如,专利文献1)。由于电池在充放电过程中会发热,因此需要对其进行适当的冷却。特别是在进行快速充电时,电池更容易发热。如果电池发热达到规定温度以上,从安全性的角度考虑,充电输出会受到限制。
另一方面,在专利文献1所记载的工业车辆的电池温度调节系统中,在集装箱用无人搬运车沿行驶路径进行环绕时,控制电池温度调节装置以从预充电时刻到充电时刻将电池冷却到预充电目标温度。
现有技术文献
专利文献
专利文献1:日本特开2021-48737号公报
然而,如果想要将专利文献1所记载的电池温度调节系统搭载在一般车辆上,即使希望将电池冷却至预充电目标温度,根据空调装置(空调器)的使用情况等,电池温度调节装置的冷却能力也可能不足,可能无法将电池冷却至预充电目标温度。另一方面,如果为了冷却电池而限制空调装置(空调器)的使用,则便利性降低。此外,不仅在充电期间,在高负荷行驶期间,电池的发热也可能引起限制输出。
发明内容
本发明提供一种能够在不损害便利性的情况下预先避免对电池的输出进行限制的电池温度调节系统。
本发明的电池温度调节系统,其具备:
电池,其能够利用来自外部电源的电力进行充电;
电池温度调节装置,其调节所述电池的温度;以及
控制装置,其对所述电池和电池温度调节装置进行控制,
其中,所述控制装置具备:
行驶预定计划获取部,其获取车辆的行驶预定计划;
通常电池冷却控制计划部,其对通常电池冷却控制进行计划以使得所述电池的温度存在于目标温度范围内,并导出该通常电池冷却控制中的预测电池温度和所述电池温度调节装置的温度调节能力;以及
温度调节计划制定部,其制定所述电池的温度调节计划,
所述温度调节计划制定部
在预测到所述预测电池温度超过规定温度的过冲将要发生时,导出使所述电池的温度变为所述规定温度以下所需的电池温度调节量,
根据所述电池温度调节装置的温度调节能力,在所述过冲发生之前分配所述电池温度调节量。
根据本发明,能够在抑制便利性的降低的同时避免在出发后对电池的输出进行限制。
附图说明
图1是示出电池温度调节系统10的结构的图。
图2是示出温度调节装置16的结构的图。
图3是示出导航装置17的结构的图。
图4是说明行驶预定计划的一个例子和冷却能力分配控制的曲线图。
图5是说明所需的电池温度调节量的图。
图6是说明在行驶时的目标BAT温度的设定方法的图。
图7是说明在快速充电时的目标BAT温度的设定方法的图。
图8是说明电池温度调节装置的温度调节能力(冷却器除热量)的图。
图9是冷却能力分配控制的流程图。
--附图标记说明--
10 电池温度调节系统
18 空调装置
19 电池温度调节电路(电池温度调节装置)
20 控制装置
23 行驶预定计划获取部
24 目标电池温度设定部
25 通常电池冷却控制计划部
26 电池温度调节计划制定部(温度调节计划制定部)
50 外部电源
189 冷却器(热交换部)
BAT 电池
具体实施方式
以下,参考附图对本发明的电池温度调节系统的一个实施方式进行说明。
[电池温度调节系统]
如图1所示,电池温度调节系统10包括电池BAT、温度调节装置16、以及控制电池BAT和温度调节装置16的控制装置20,并且搭载在电动汽车等的车辆上。
[电池]
电池BAT例如是锂离子电池等的二次电池。电池BAT被配置为可利用从车辆外部的外部电源50、例如快速充电器导入的电力进行充电。电池BAT主要为未图示的驱动马达供电。此外,电池BAT被配置为也可利用在驱动马达的再生期间供给的电力进行充电。
[温度调节装置]
如图2所示,温度调节装置16包括空调装置(空调器)18和电池温度调节电路19。需要说明的是,以下,将空调装置18称为空调器18。空调器18具有制冷循环180,通过调整车室内的空气的状态来调整车室内的环境。空调器18由接受到驾乘人员(以下,也称为用户)的操作的后述的温度调节控制部21控制。电池温度调节电路19通过使制冷剂在制冷剂流路中流动来冷却或加热电池BAT等。温度调节控制部21基于电池温度调节电路19的温度调节能力控制电池温度调节电路19的动作,以使得电池BAT的温度存在于目标温度范围内。以下,将该控制称为通常电池冷却控制,但除了通常电池冷却控制以外,还可以通过后述的冷却能力分配控制来控制电池温度调节电路19的动作。
在温度调节装置16中,空调器18的制冷循环180和电池温度调节电路19被配置为彼此的制冷剂可以通过冷却器189进行热交换。
参照图2更具体地进行说明,空调器18的制冷循环180串联地具备压缩机181、冷凝器182、膨胀阀183和蒸发器184,另外,配置有膨胀阀183和蒸发器184的第一流路185a和配置有其他膨胀阀186和冷却器189的第二流路185b并联设置。此外,第一流路185a和第二流路185b的分支部185c与膨胀阀183之间设有切断阀187,通过使切断阀187处于ON状态,制冷剂流入第一流路185a和第二流路185b,通过使切断阀187处于OFF状态,制冷剂仅流入第二流路185b。
电池温度调节电路19串联连接有供给制冷剂的泵EWP、冷却器189、电池BAT和加热器30。
在冷却器189中,制冷循环180的制冷剂与电池温度调节电路19的制冷剂进行热交换。因此,在温度调节装置16中,空调器18的制冷循环180的冷却能力被分配给用于空调器和用于电池冷却。即,当不使用空调器18时(空调器OFF),切断阀187变为OFF状态,制冷循环180的全部冷却能力都可以用于电池冷却。另一方面,当使用空调器18时(空调器ON),切断阀187变为ON状态,制冷循环180的冷却能力中的可用于电池冷却的冷却能力减少了分配给用于空调器的冷却能力的量。因此,制冷循环180的冷却能力中的可用于电池冷却的冷却能力取决于空调器18的ON/OFF。需要说明的是,当加热电池BAT时,将加热器30设置为ON即可。
[导航装置]
接下来,参照图3对导航装置17的结构的一个例子进行说明。如图3所示,导航装置17具备处理器171、存储器172、GPS单元173、显示部174、操作部175和接口176。此外,构成部171~176分别由总线177连接。
处理器171例如是控制整个导航装置17的CPU。存储器172例如包括RAM等主存储器和作为非易失性存储器的闪存等辅助存储器。主存储器被用作处理器171的工作区域。辅助存储器存储用于操作导航装置17的各种程序。存储在辅助存储器中的程序被加载到主存储器中,并且由处理器171执行。
此外,导航装置17的辅助存储器还存储用于确定车辆的当前位置、到目的地的路径引导等的地图数据。虽然省略了详细说明,但是地图数据包括表示车辆可以行驶的道路的道路数据、表示关于每个设施的信息的设施数据等。
GPS单元173接收来自GPS卫星的GPS信号(电波),并且定位车辆的当前位置。在确定车辆的当前位置时使用由GPS单元173定位的当前位置。
显示部174包括显示文字、图像的显示器、控制整个显示器的图形控制器、以及用于临时记录要在显示器上显示的图像的图像数据的VRAM(Video RAM)等的缓冲存储器。显示器例如是液晶显示器、有机EL显示器。
操作部175将对应于从用户接收到的操作的操作信号输入到导航装置17的内部(例如,处理器171)。操作部175例如是触摸面板。此外,操作部175也可以是具备多个键的遥控器、键盘、鼠标等。
接口176控制导航装置17与外部(例如电池信息获取部22、行驶预定计划获取部23)之间的数据的输入和输出。接口176由处理器171控制。需要说明的是,导航装置17的功能的一部分或全部可以通过例如车辆的用户拥有的智能手机、平板终端等的终端装置的功能来实现。
导航装置17例如参照地图数据等来确定从作为车辆的当前所在地的本车位置到由车辆的用户设定的目的地的路径。此外,导航装置17从电池信息获取部22获取电池BAT的SOC(State Of Charge、充电率)信息,当需要充电时,制定将在充电站的充电编入引导路径的行驶预定计划,并且通过在显示器上显示制定的行驶预定计划来引导用户。
[控制装置]
如图1所示,控制装置20具备温度调节控制部21、电池信息获取部22、行驶预定计划获取部23、目标电池温度设定部24、通常电池冷却控制计划部25和电池温度调节计划制定部26。控制装置20由具备处理器、存储器、接口等的ECU(Electronic Control Unit)来实现。需要说明的是,每个功能部可以构成为分别独立的控制装置。
温度调节控制部21根据用户的要求等控制空调器18,并且通过通常电池冷却控制和冷却能力分配控制来控制电池温度调节电路19。
电池信息获取部22从未示出的传感器装置获取当前的电池BAT的温度和电池单元电压,并且根据各种信息来估计SOC。
行驶预定计划获取部23从导航装置17获取行驶预定计划。图4示出行驶预定计划的一个例子,例如,是包括车辆从时刻t1到时刻t2以时速120km常速行驶、从时刻t2到时刻t3在充电站进行快速充电的行驶计划的行驶预定计划。
通常电池冷却控制计划部25按照行驶预定计划基于电池温度调节电路19的温度调节能力设定通常电池冷却控制,以使得电池BAT的温度存在于目标温度范围内。需要说明的是,在本实施方式中,该目标温度范围是T2(℃)~T3(℃)。此外,电池温度调节电路19的温度调节能力是在冷却电池BAT时温度调节装置16中可用于电池冷却的冷却能力,是冷却器189能够降低电池温度调节电路19的制冷剂的热的热量。以下,将该热量称为冷却器除热量。
电池温度调节电路19的温度调节能力、即冷却器除热量是根据车辆的状态和空调器18的状态来确定的。如图8所示,车辆的状态例如分为五个阶段:车辆以未插电的状态停放(Plug-out停放(IG-OFF))的状态、正在行驶、正在进行普通充电、正在进行快速充电、以及车辆以插电的状态停放(Plug-in停放(IG-ON))的状态。此外,空调器18的状态分为三个阶段:空调器18关闭状态(A/C_OFF)、空调器18处于空调优先模式的状态(空调优先模式)、以及空调器18开启状态(A/C_ON)。空调优先模式是在车辆启动时主动调节车室温度的模式。
然后,根据车辆的状态和空调器18的状态的组合将其分类为五种冷却器冷却模式。冷却器冷却模式由无冷却模式、空调优先模式、A/C运转时的冷却器冷却模式、停车且A/C运转时的冷却器冷却模式、冷却器单独运转时的模式和停车且冷却器单独运转时的模式的六个阶段构成。为这六个阶段的模式分别设定冷却能力(0<W1<W3<W2<W5<W4)。因此,电池温度调节计划制定部26能够根据行驶预定计划计算预测电池温度以及此时的电池温度调节电路19的冷却能力、即冷却器除热量。
通常电池冷却控制计划部25计算在行驶预定计划中进行通常电池冷却控制时的预测电池温度和此时的冷却器除热量。图4示出了行驶预定计划,以及由通常电池冷却控制计划部25计算出的预测电池温度和冷却器除热量(图中A~C)。在图8中,A/C表示空调器,IG表示点火装置。
目标电池温度设定部24根据行驶预定计划计算电池BAT的SOC推移(以下,称为SOC推移)和要求BAT输出。
进一步,目标电池温度设定部24根据计算出的电池BAT的SOC推移和要求BAT输出设定目标BAT温度。例如,如图6所示,在行驶预定计划中的行驶期间,目标电池温度设定部24根据所获取的电池BAT的SOC推移和要求BAT输出,参照SOC-电池温度映射,设定满足未来要求的BAT输出的目标BAT温度。此外,如图7所示,在行驶预定计划中的充电时,目标电池温度设定部24从导航装置17、服务器装置获取预定进行充电的充电站的充电器的电流(设备电流)和闭路电压CCV(Closed circuit voltage)推移,参照CCV-电池温度映射,以不限制BAT再生的方式设定行驶预定计划中的充电时的目标BAT温度。需要说明的是,该目标BAT温度低于电池BAT进行省电的省电温度,并且高于或者等于通常电池冷却控制的高温侧目标温度(T3(℃))。
电池温度调节计划制定部26制定电池BAT的温度调节计划。电池温度调节计划制定部26将通常电池冷却控制计划部25运算出的预测电池温度与目标电池温度设定部24设定的目标BAT温度进行比较,当预测电池温度超过目标BAT温度(发生所谓的过冲)时,计算出不足的电池冷却量。不足的电池冷却量是指使预测电池温度变为目标BAT温度以下所需的电池冷却量。
当用曲线图表示不足的电池冷却量的最小值时,如图5所示,该最小值对应于从发生过冲的时刻到预测温度的拐点之间的预测电池温度和目标BAT温度之间的区域(图5中的D)。
当将要发生过冲时,电池温度调节计划制定部26在发生过冲之前分配不足的电池冷却量。通过使用上述不足的电池冷却量的最小值,可以以最小的消耗电力抑制过冲。
电池温度调节计划制定部26将不足的电池冷却量分配到发生过冲之前且在通常电池冷却控制中电池冷却量为零的区域,即对应于无冷却模式的区域(以下,称为冷却器非运行区域)。
具体而言,如图4所示,在冷却器非运行区域E~G,从过冲发生时刻向车辆启动时刻,按照E、F、G的顺序进行分配。
图9是冷却能力分配控制的流程图。
首先,行驶预定计划获取部23从导航装置17获取行驶预定计划(S1)。接着,通常电池冷却控制计划部25运算在行驶预定计划中进行通常电池冷却控制时的预测电池温度和冷却器除热量(S2)。此外,目标电池温度设定部24根据行驶预定计划计算出电池BAT的SOC推移(以下称为SOC推移)和要求BAT输出(S3),并设定目标BAT温度(S4)。需要说明的是,步骤S2、步骤S3和步骤S4的顺序可以颠倒,也可以同时进行。
电池温度调节计划制定部26将预测电池温度与目标BAT温度进行比较(S5)。当没有发生预测电池温度超过目标BAT温度的过冲(在S6中为否)时,处理结束。
当将要发生预测电池温度超过目标BAT温度的过冲(在S6中为是)时,电池温度调节计划制定部26计算出不足的电池冷却量(S7),并在发生过冲之前分配不足的电池冷却量(S8)。电池温度调节计划制定部26重复该处理,直到在步骤S5至S8的所有行驶预定计划中都没有发生过冲。
以上,使用实施方式对用于实施本发明的方式进行了说明,但本发明完全不限于这样的实施方式,在不脱离本发明的主旨的范围内能够进行各种变形和置换。
此外,在本说明书中至少记载了以下的事项。需要说明的是,尽管在括号内示出了在上述实施方式中对应的构成要素等,但并不限于此。
(1)一种电池温度调节系统(电池温度调节系统10),其具备:
电池(电池BAT),其能够利用来自外部电源(外部电源50)的电力进行充电;
电池温度调节装置(电池温度调节电路19),其调节所述电池的温度;以及
控制装置(控制装置20),其对所述电池和电池温度调节装置进行控制,
其中,所述控制装置具备:
行驶预定计划获取部(行驶预定计划获取部23),其获取车辆的行驶预定计划;
通常电池冷却控制计划部(通常电池冷却控制计划部25),其对通常电池冷却控制进行计划以使得所述电池的温度存在于目标温度范围内,并导出该通常电池冷却控制中的预测电池温度和所述电池温度调节装置的温度调节能力;以及
温度调节计划制定部(电池温度调节计划制定部26),其制定所述电池的温度调节计划,
所述温度调节计划制定部
在预测到所述预测电池温度超过规定温度的过冲将要发生时,导出使所述电池的温度变为所述规定温度以下所需的电池温度调节量,
根据所述电池温度调节装置的温度调节能力,在所述过冲发生之前分配所述电池温度调节量。
根据(1),通过提前制定一个计划,即当在行驶预定计划中进行通常电池冷却控制时的预测电池温度超过规定温度时,导出使电池的温度变为规定温度以下所需的电池温度调节量,在过冲发生之前分配电池温度调节量,能够避免在出发后对电池的输出进行限制,延长到达目的地的时间。此外,由于根据电池温度调节装置的温度调节能力来分配所需的电池温度调节量,因此能够抑制便利性的降低。
(2)根据(1)所述的电池温度调节系统,其中,
所述温度调节计划制定部从所述过冲发生时刻向车辆启动时刻,按照顺序优先分配所述电池温度调节量,以使得不超过所述电池温度调节装置的温度调节能力。
根据(2),通过从过冲发生时刻向车辆启动时刻按照顺序优先分配电池温度调节量,能够更适当地避免过冲的发生。
(3)根据(1)或(2)所述的电池温度调节系统,还具备:
空调装置(空调装置18),其调节车室内的温度;以及
热交换部(冷却器189),其能够在该电池温度调节装置的制冷剂和该空调装置的制冷剂之间进行热交换。
根据(3),由于电池温度调节系统具备能够在电池温度调节装置的制冷剂和空调装置的制冷剂之间进行热交换的热交换部,因此能够抑制电池温度调节装置和空调装置的制冷循环的大型化。
(4)根据(3)所述的电池温度调节系统,其中,
分配所述电池温度调节量的分配目的地是在所述通常电池冷却控制下所述热交换部不运行的区域。
根据(4),在空调装置和电池温度调节装置之间分配冷却能力的系统中,通过将电池温度调节量分配给热交换部不运行的区域,能够有效地利用热交换部的温度调节能力。
(5)根据(3)或(4)所述的电池温度调节系统,其中,
所述电池温度调节装置的冷却能力是根据所述车辆的状态和所述空调装置的状态来确定的。
根据(5),在空调装置和电池温度调节装置之间分配冷却能力的系统中,能够适当地掌握电池温度调节装置的冷却能力。
(6)根据(1)~(5)中任一项所述的电池温度调节系统,其中,
所述控制装置还具备目标电池温度设定部(目标电池温度设定部24),其设定作为所述规定温度的目标电池温度,
所述目标电池温度设定部根据所述行驶预定计划计算所述电池的SOC推移和要求BAT输出,并且根据计算出的所述电池的SOC推移和要求BAT输出来设定所述车辆的行驶时的所述目标电池温度。
根据(6),能够适当地设定用于判断过冲的车辆行驶时的目标电池温度。
(7)根据(1)~(6)中任一项所述的电池温度调节系统,其中,
所述控制装置还具备目标电池温度设定部,其设定作为所述规定温度的目标电池温度,
所述目标电池温度设定部从所述行驶预定计划中获取充电设备的信息,并根据所述充电设备的信息设定所述车辆的充电时的所述目标电池温度。
根据(7),能够适当地设定用于判断过冲的车辆充电时的目标电池温度。
Claims (7)
1.一种电池温度调节系统,其具备:
电池,其能够利用来自外部电源的电力进行充电;
电池温度调节装置,其调节所述电池的温度;以及
控制装置,其对所述电池和电池温度调节装置进行控制,
其中,所述控制装置具备:
行驶预定计划获取部,其获取车辆的行驶预定计划;
通常电池冷却控制计划部,其对通常电池冷却控制进行计划以使得所述电池的温度存在于目标温度范围内,并导出该通常电池冷却控制中的预测电池温度和所述电池温度调节装置的温度调节能力;以及
温度调节计划制定部,其制定所述电池的温度调节计划,
所述温度调节计划制定部
在预测到所述预测电池温度超过规定温度的过冲将要发生时,导出使所述电池的温度变为所述规定温度以下所需的电池温度调节量,
根据所述电池温度调节装置的温度调节能力,在所述过冲发生之前分配所述电池温度调节量。
2.根据权利要求1所述的电池温度调节系统,其中,
所述温度调节计划制定部从所述过冲发生时刻向车辆启动时刻按照顺序优先分配所述电池温度调节量,以使得不超过所述电池温度调节装置的温度调节能力。
3.根据权利要求1或2所述的电池温度调节系统,其中,还具备:
空调装置,其调节车室内的温度;以及
热交换部,其能够在该电池温度调节装置的制冷剂和该空调装置的制冷剂之间进行热交换。
4.根据权利要求3所述的电池温度调节系统,其中,
分配所述电池温度调节量的分配目的地是在所述通常电池冷却控制下所述热交换部不运行的区域。
5.根据权利要求3或4所述的电池温度调节系统,其中,
所述电池温度调节装置的冷却能力是根据所述车辆的状态和所述空调装置的状态来确定的。
6.根据权利要求1~5中任一项所述的电池温度调节系统,其中,
所述控制装置还具备目标电池温度设定部,其设定作为所述规定温度的目标电池温度,
所述目标电池温度设定部根据所述行驶预定计划计算所述电池的SOC推移和要求BAT输出,并且根据计算出的所述电池的SOC推移和要求BAT输出来设定所述车辆的行驶时的所述目标电池温度。
7.根据权利要求1~6中任一项所述的电池温度调节系统,其中,
所述控制装置还具备目标电池温度设定部,其设定作为所述规定温度的目标电池温度,
所述目标电池温度设定部从所述行驶预定计划中获取充电设备的信息,并根据所述充电设备的信息设定所述车辆的充电时的所述目标电池温度。
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