CN104508859B - 无人搬运车的电池组单元 - Google Patents
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Abstract
无人搬运车的电池组单元具备:壳体,其安装于无人搬运车的车体;电池组,其被收容于壳体;控制基板,其被收容于壳体,构成用于监视电池组的充放电状态的充放电监视器;以及电气部件,其被收容于壳体,与电池组电连接。电池组以电池组的底面与壳体的底面分离的状态配置于壳体内。
Description
技术领域
本发明涉及一种将电池组用作电源的无人搬运车的电池组单元。
背景技术
在工厂、仓库内使用的无人搬运车利用电动机进行行驶,通常使用铅酸蓄电池作为电动机的驱动源的电池组。在日本JP1991-37967A中公开了一种在设于工厂、仓库内的充电站中将电池组满充电之后使用的无人搬运车。另外,在日本JP2007-74800A中公开了一种将并非满充电而是部分充电也能够使用的锂离子电池设为电池组的无人搬运车。
日本JP2007-74800A所公开的无人搬运车利用由锂离子电池构成的电池组的电力来行驶。在构成电池充放电管理系统的充电站中对无人搬运车的电池组充电。在充电站中,在电池组的剩余容量成为充电开始容量时开始充电,在电池组的剩余容量成为充电停止容量时停止充电。
发明内容
在将锂离子电池用作电池组的无人搬运车中,将电池组、用于监视电池组的充放电状态的充放电监视器等控制基板、其它电气部件集中到一起而收容到电池组壳体内,由此构成电池组单元。在这种电池组单元中,由于电池组壳体内的湿度、温度、气候条件等,有时在电池组壳体内表面产生结露。当该结露沿着电池组壳体内表面流下等而附着于电池组、电气部件等时,有可能产生电气故障。
本发明的目的在于,提供一种无人搬运车的电池组单元,能够避免电池组壳体内的结露附着于电池组、电气部件。
根据本发明的某一方式,无人搬运车的电池组单元具备:壳体,其安装于无人搬运车的车体;电池组,其被收容于壳体;控制基板,其被收容于壳体,构成用于监视电池组的充放电状态的充放电监视器;以及电气部件,其被收容于壳体,与电池组电连接。电池组以电池组的底面与壳体的底面分离的状态配置于壳体内。
附图说明
图1是例示本发明的实施方式的无人搬运车的行驶路径的图。
图2是本实施方式的无人搬运车的概要结构图。
图3是表示充电时的无人搬运车的电池组单元与充电站的连接的图。
图4是搭载于无人搬运车的电池组单元的俯视图。
图5是电池组单元的侧视图。
图6是电池组单元的俯视图。
图7是沿图6的VII-VII线的剖面图。
图8是沿图6的VIII-VIII线的剖面图。
具体实施方式
下面,参照附图说明本实施方式的无人搬运车的电池组单元。
如图1所示,无人搬运车1沿着行驶路线R行驶,行驶路线R是以通过保管有部件等的拣货站(PickingStation)PS和生产线的组装站BS的方式设定的环行轨道。无人搬运车1使用搭载于车辆的轨道传感器来检测行驶路线R而行驶,因此能够以无人状态行驶。
在拣货站PS中,将组装站BS所需的部件装载于无人搬运车1。无人搬运车1在行驶路线R上行驶,将所装载的部件搬运到组装站BS。在组装站BS中,将无人搬运车1所装载的部件卸下。之后,无人搬运车1再次在行驶路线R上行驶,返回到拣货站PS。这样,无人搬运车1在拣货站PS与组装站BS之间循环行驶。在环行轨道的行驶路线R外侧且拣货站PS与组装站BS之间配置有充电站CS。
充电站CS具备设备侧控制装置2以及由该设备侧控制装置2控制的自动充电器3。另外,在行驶路线R里侧且组装站BS的入口位置和出口位置设有基站4,用于执行无人搬运车1与设备侧控制装置2之间的信号的发送和接收。
如图2所示,无人搬运车1具备:车体6;脚轮9,其配置于车体6的四角的下部;两个支承轴7,其从车体6的前侧下部和后侧下部朝向地面沿铅直方向延伸;驱动单元8,其以可转动的方式设于支承轴7;驱动轮10,其与驱动单元8相邻配置;以及控制器(未图示),其控制驱动单元8。
脚轮9是支承车辆的重量的车轮,构成为跟随车辆的移动方向而转动。驱动单元8被设为能够绕支承轴7的轴转动,在驱动单元8的左右两侧配置有驱动轮10。对一个驱动单元8配置两个的驱动轮10分别由内置于驱动单元8内的一对驱动电动机独立地驱动。此外,在驱动单元8的前侧和后侧设有支架,在这些支架上设置有用于检测行驶路线R的轨道传感器(未图示)。
用于使驱动单元8的驱动电动机进行驱动的电源即电池组B以被收容于电池组单元5的电池组壳体BC内的状态搭载于车体6的中央位置。
如图3所示,在电池组壳体BC内收容了由锂离子二次电池构成的电池组B以及将电池组B的电力提供给各驱动单元8的驱动电动机的功率继电器等电气部件。并且,在电池组壳体BC内收容了用于监视电池组B的状态的充放电监视器11、充放电监视器11的控制基板11A(参照图7)以及通信单元14等,该通信单元14与自动充电器3、设备侧控制装置2的基站4之间发送和接收信号。
电池组B由三个电池模组BM构成,这些电池模组BM通过母线BB进行串联连接。电池模组BM的数量并不限定于三个,根据需要任意地设定。电池模组BM是通过将多个单电池串联连接而构成的。在本实施方式中,电池组B由三个电池模组BM构成,满充电状态的电池组B的输出电压为25V左右。
在电池组B的供电线12的端部设有受电触点13。受电触点13以暴露于外部的方式设置于电池组壳体BC的壳体壁面。通过将充电站CS的自动充电器3所具备的供电触点23与受电触点13连接来对电池组B进行充电。此外,供电触点23构成为相对于自动充电器3伸缩自由。
充放电监视器11每隔规定时间(例如10msec)对电池组B的充电容量(电池组电压)、各单电池的充电容量(单电池电压)、各电池模组BM的充电容量、电池组B的输入输出电流量、电池组B的异常历史记录等各种电池组状态信息进行监视并存储,并且显示这些电池组状态信息。充放电监视器11经由以暴露于外部的方式设于电池组壳体BC的壳体壁面的通信单元14将电池组状态信息发送到设备侧控制装置2、自动充电器3。电池组单元5的通信单元14、设备侧控制装置2的基站4以及自动充电器3的通信单元24利用光通信等通信方法来发送和接收信息。
充放电监视器11在判断为构成电池组B的各电池模组BM的充电容量(电压)为关机阈值(例如2.8V~3V)以下即处于过放电状态的情况下,显示电池组B处于异常状态的情况并且使无人搬运车1异常停止。关机阈值为根据无人搬运车1的行驶状态等变更的阈值,通常设定为3.0V。但是,在无人搬运车1通过行驶路线R的组装站BS时,关机阈值被设定为低于3.0V的设定值、例如2.8V。
也就是说,充放电监视器11在经由通信单元14接收到从设置于组装站BS的入口位置的基站4发送的关机禁止命令时,将关机阈值从3.0V变更为2.8V。另外,充放电监视器11在经由通信单元14接收到从设置于组装站BS的出口位置的基站4发送的关机禁止解除命令时,将关机阈值从2.8V变更为3.0V。通过这样变更关机阈值,能够抑制无人搬运车1在组装站BS区域内的异常停止的发生频率。
无人搬运车1利用电池组B的电力来行驶,因此伴随着行驶而电池组B的充电容量(电池组电压)下降。因此,使无人搬运车1在充电站CS中临时停止,由自动充电器3对电池组B进行充电。如图3所示,自动充电器3具备:直流电源21,其能够使电压升压至电池组B的上限电压(例如25.02V);充电控制装置20,其控制从直流电源21提供给电池组B的充电电流值和充电电压值;以及通信单元24,其能够与无人搬运车1的通信单元14进行通信。通信单元24与无人搬运车1的通信单元14之间交换各种电池组状态信息。
根据无人搬运车1的电池组B的电池组电压来判断是否进行充电。更具体地说,充电站CS判断当前电池组B的电池组电压是否需要充电、即电池组电压是否低于不需充电阈值电压。在判断为需要充电的情况下,由自动充电器3对无人搬运车1的电池组B进行充电。
不需充电阈值电压被设定为在电池组B的过充电电压与过放电电压之间的电压,例如24.9V。在电池组B的电池组电压低于这样设定的不需充电阈值电压时判断为电池组B需要充电,在电池组电压高于不需充电阈值电压时判断为电池组B不需要充电。此外,通过使过放电电压与不需充电阈值电压的电压差充分大,能够防止电池组B成为过放电状态,从而能够保护电池组B。
在对电池组B进行充电时,使自动充电器3的供电触点23朝向无人搬运车1的受电触点13伸长,供电触点23与受电触点13连接。通过这样供电触点23与受电触点13连接,从自动充电器3的直流电源21对电池组B提供充电电力。充电控制装置20不仅构成为能够执行恒定电流-恒定电压方式的普通充电,还构成为能够执行将比普通充电时的充电电流大的充电电流提供给电池组B的恒定电流-恒定电压方式的快速充电。快速充电适合于需要短时间充电的无人搬运车1的电池组充电,在本实施方式中,充电控制装置20执行快速充电。
充电控制装置20还能够在电池组B变为满充电之前使充电停止。例如,充电控制装置20进行在无人搬运车1的电池组电压上升至不需充电阈值电压的时间点停止对电池组B充电的部分充电。另外,充电控制装置20进行执行恒定电流-恒定电压方式的充电预先设定的规定时间并在规定时间经过时停止对电池组B充电的部分充电。
另外,在搭载于无人搬运车1的电池组单元5中,由于电池组壳体BC内的湿度、温度、气候条件等,有时在电池组壳体BC内表面产生结露。当该结露沿着电池组壳体BC的内表面流下等而附着于电池组B、电气部件等时,有可能产生电气故障。
因此,本实施方式的无人搬运车1的电池组单元5构成为能够避免电池组壳体BC内的结露附着于电池组B、电气部件等这一情况。
图4是表示搭载于无人搬运车1的车体6的电池组单元5的样子的俯视图。
如图4所示,在无人搬运车1的车体6的中央位置处,由沿车辆前后方向等延伸的车架分隔而形成有搭载空间6A,在该搭载空间6A内收纳了电池组单元5。利用未图示的固定单元将电池组单元5固定于搭载空间6A。电池组单元5具有电池组壳体BC,电池组壳体BC通过壳体壁形成为箱状。
此外,在充电时,与自动充电器3相对置的电池组壳体BC的车辆右侧面侧的壳体壁(壳体侧壁面)如图5所示那样从车体6的搭载空间6A暴露于外部。在电池组壳体BC的壳体侧壁面以暴露的状态配置受电触点13、通信单元14以及用于显示电池组B的状态的显示装置15。
如图6和图7所示,在电池组壳体BC内部设置有作为分隔内部空间的纵壁的纵壁支架25。纵壁支架25是以相对于电池组壳体BC的底面沿铅直方向竖立的方式固定并且沿车辆前后方向延伸的壁部件。在电池组壳体BC内部且与纵壁支架25相比靠里侧的区域(由纵壁支架25分隔的区域中的远离壳体侧壁面一侧的区域)中沿上下方向并列设置构成电池组B的电池模组BM。另外,在电池组壳体BC内部且与纵壁支架25相比靠近前侧的区域(由纵壁支架25分隔的区域中的接近壳体侧壁面一侧的区域)中,在远离电池组壳体BC的底面的位置处配置有受电触点13、通信单元14、显示装置15以及功率继电器26等电气部件。
如图7和图8所示,在纵壁支架25的上部设有一对横梁支架27。一对横梁支架27在车辆前后方向上隔着规定间隔平行地配置。构成为,横梁支架27的基端部固定于纵壁支架25的上部,横梁支架27的前端向电池组壳体BC的里侧延伸。在一对横梁支架27的上表面设有一个支承板材28,在支承板材28的上表面载置有构成充放电监视器11的控制基板11A等。此外,在横梁支架27的下方配置有电池模组BM,支承板材28构成为覆盖电池组B的上方。
三个电池模组BM沿上下方向层叠,在上下相邻的电池模组BM彼此的前侧端之间和后侧端之间插入隔件29。各电池模组BM隔着隔件29层叠,因此在相邻的电池模组BM之间形成有间隙。利用该间隙能够允许由于电池模组BM的充电、放电导致温度上升而引起的层叠方向的热膨胀。另外,空气通过电池模组BM之间的间隙,因此能够促进与电池模组BM的温度上升相伴随的散热。
在配置于最下部的电池模组BM的下表面(底面)与电池组壳体BC的底面之间配置有柱套筒(collarsleeve)30,最下部的电池模组BM的下表面处于从电池组壳体BC的底面浮起的状态。这三个电池模组BM具有沿上下方向贯通的固定孔32,利用贯通各电池模组BM的固定孔32和柱套筒30的固定螺栓31来固定电池模组BM和电池组壳体BC。
如图8所示,层叠而成的电池模组BM通过母线BB进行电连结,与位于最上部和最下部的电池模组BM的输出端子相连接的母线BB连接于受电触点13。此外,将位于最上部和最下部的电池模组BM的输出端子与受电触点13连接的母线BB的一部分并未图示,但是构成为经由功率继电器26对驱动单元8提供电力。
在上述无人搬运车1的电池组单元5中,根据电池组壳体BC周围温度的变化、电池组壳体BC内的湿度等条件,有时在电池组壳体BC内表面产生结露。因此,在电池组单元5中,利用柱套筒30将在电池组壳体BC内设于最下部的电池模组BM以从壳体底面浮起的方式配置。因此,即使在电池组壳体BC内表面产生的结露流过电池组壳体BC内表面而积存于壳体底面,也能够防止结露水附着于电池模组BM的情况。另外,能够利用从电池模组BM产生的热使积存于壳体底面的结露水干燥。
并且,在无人搬运车1的电池组单元5中,功率继电器26、通信单元14、显示装置15等电气部件、控制基板11A也被配置在与电池组壳体BC的底面分离的位置。因而,也能够防止结露水附着于这些电气部件等的情况。
并且,在无人搬运车1的电池组单元5中,构成电池组B的电池模组BM被配置在由纵壁支架25、横梁支架27以及支承板材28分隔形成的空间内。因此,即使在从外部、特别是从电池组单元5的侧面侧受冲击的情况下,也能够防止配置于纵壁支架25的功率继电器26、通信单元14、显示装置15等的电气部件、配置于支承板材28的控制基板11A与电池模组BM接触。这样,能够使用纵壁支架25、横梁支架27以及支承板材28来保护电池模组BM,从而能够防止电池模组BM破损等。
并且,在无人搬运车1的电池组单元5中,纵壁支架25、横梁支架27以及支承板材28用于将作为配置电池模组BM的空间与配置功率继电器26等电气部件和控制基板11A的空间相分离的分隔壁而发挥功能。因而,能够防止这些电气部件、控制基板11A受到由电池模组BM的温度变化引起的影响。
根据上述本实施方式的无人搬运车1的电池组单元5,能够得到以下示出的效果。
(I)无人搬运车1的电池组单元5具备:电池组B;控制基板11A,其构成用于监视电池组B的充放电状态的充放电监视器11;与电池组B电连接的功率继电器26等电气部件;以及电池组壳体BC,其收容这些结构部件等。电池组B以电池组B的底面与电池组壳体BC的底面分离的方式配置于电池组壳体BC内。由此,即使在电池组壳体BC内产生的结露积存于壳体底面,也能够防止结露水附着于电池组B等情况。另外,利用从电池组B产生的热,能够使积存于壳体底面的结露水干燥。
(II)电池组B是层叠多个电池模组BM而构成的,在沿上下方向相邻的电池模组BM之间插入隔件29以形成间隙。由此,能够允许因电池模组BM的充电、放电导致温度上升而引起的层叠方向的热膨胀。另外,空气通过电池模组BM之间的间隙,因此能够促进与电池模组BM的温度上升相伴随的散热。
(III)无人搬运车1的侧部侧的电池组壳体BC的壳体壁(侧壁面)从车体6的搭载空间6A暴露于外部,在电池组壳体BC内以与侧壁面相对置的方式设置从壳体底面竖立的纵壁支架25。在与纵壁支架25相比靠电池组壳体BC的里侧的位置配置电池组B,在与纵壁支架25相比靠近前侧的位置配置电气部件。因此,即使在从暴露于外部的电池组壳体BC的侧壁面受冲击的情况下,也能够防止配置于纵壁支架25的功率继电器26等电气部件与电池模组BM接触的情况。因此,能够防止电池模组BM被破坏,从而能够保护电池模组BM。另外,能够防止这些电气部件、控制基板11A受到由电池模组BM的温度变化引起的影响。
(IV)在纵壁支架25的上部设有横梁支架27,在横梁支架27上配置有覆盖电池组B上方的支承板材28。构成充放电监视器11的控制基板11A被载置在支承板材28的上表面。因此,即使从暴露于外部的电池组壳体BC的侧壁面受冲击的情况下,也能够防止配置于支承板材28上的控制基板11A与电池模组BM接触的情况。因此,能够防止电池模组BM被破坏,从而能够保护电池模组BM。另外,能够防止控制基板11A受到由电池模组BM的温度变化引起的影响。
(V)充放电监视器11监视构成电池组B的多个电池模组BM的电压,在任一个电池模组BM的电压变为预先设定的设定电压值以下的情况下,显示电池组B处于异常状态这一情况并且使无人搬运车1异常停止。在无人搬运车1在组装站BS的区域内行驶的情况下,与在其它区域内行驶的情况相比,减小设定电压值。因此,在无人搬运车1在组装站BS的区域内行驶期间,能够抑制无人搬运车1的异常停止产生频率。
以上,说明了本发明的实施方式,但是上述实施方式仅示出本发明的应用例的一部分,并非是意图将本发明的技术范围限定于上述实施方式的具体结构。
本申请主张2012年8月2日在日本专利局申请的日本JP2012-171715的优先权,并以此为基础提出申请,通过参照将这些申请的全部内容取入到本说明书。
Claims (3)
1.一种无人搬运车的电池组单元,具备:
壳体,其安装于上述无人搬运车的车体;
电池组,其被收容于上述壳体,具有沿上下方向贯通的孔;
控制基板,其被收容于上述壳体,构成用于监视上述电池组的充放电状态的充放电监视器;
电气部件,其被收容于上述壳体,与上述电池组电连接,
套筒,其配置于上述电池组的底面与上述壳体的底面之间以使上述电池组的底面与上述壳体的底面分离;以及
螺栓,其以穿过上述电池组的孔与上述套筒的状态来将上述电池组固定于上述壳体,
其中,上述壳体以上述壳体的侧壁面暴露于外部的方式配置于上述无人搬运车,
在上述壳体内,以与上述壳体的侧壁面相对置的方式设置有从上述壳体的底面竖立的纵壁支架,
上述电池组配置于与上述壳体的侧壁面分离、且与上述纵壁支架相比靠上述壳体的里侧的位置,
上述电气部件配置于接近上述壳体的侧壁面、且与上述纵壁支架相比靠上述壳体的近前侧的位置,
上述电气部件和上述控制基板配置在与上述壳体的底面分离的位置。
2.根据权利要求1所述的无人搬运车的电池组单元,其特征在于,
上述电池组是将由锂离子电池构成的多个电池模组层叠而构成的,
在相邻的上述电池模组之间插入隔件以形成间隙。
3.根据权利要求1所述的无人搬运车的电池组单元,其特征在于,
还具备:
横梁支架,其固定于上述纵壁支架的上部;以及
支承板材,其设于上述横梁支架,配置成覆盖上述电池组的上方,
其中,上述控制基板配置于上述支承板材的上表面。
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JPWO2014021379A1 (ja) | 2016-07-21 |
JP5994857B2 (ja) | 2016-09-21 |
RU2569935C1 (ru) | 2015-12-10 |
MY154359A (en) | 2015-06-01 |
MX338350B (es) | 2016-04-13 |
EP2882009A1 (en) | 2015-06-10 |
EP2882009A4 (en) | 2015-07-15 |
BR112015002201A2 (pt) | 2017-07-04 |
CN104508859A (zh) | 2015-04-08 |
US9698393B2 (en) | 2017-07-04 |
BR112015002201B1 (pt) | 2021-08-10 |
KR101741341B1 (ko) | 2017-05-29 |
MX2015001432A (es) | 2015-05-15 |
WO2014021379A1 (ja) | 2014-02-06 |
KR20150031329A (ko) | 2015-03-23 |
EP2882009B1 (en) | 2017-06-28 |
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