CN115735126A - 具有改进的电压感测部件的组装结构的电池模块和包括该电池模块的电池组 - Google Patents
具有改进的电压感测部件的组装结构的电池模块和包括该电池模块的电池组 Download PDFInfo
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Abstract
根据本发明的一种电池模块包括:单体堆,所述单体堆由在一个方向上堆叠的多个电池单体构成;和感测模块,所述感测模块被布置在所述单体堆的前部或后部处,以用于所述电池单体的电压感测和电连接,其中,所述感测模块包括:主框架,所述主框架被形成为覆盖所述单体堆的前部或后部,并且具有多个引线抽出孔,所述电池单体的电极引线能够通过所述多个引线抽出孔被抽出;多个汇流条,所述多个汇流条被布置在所述主框架上,以沿着一个方向彼此间隔开;和刚性材料的印刷电路板,所述印刷电路板被附接到所述主框架,并且具有多个感测尖端,所述多个感测尖端被设置成能够附接到对应的汇流条并且能够从对应的汇流条拆卸。
Description
技术领域
本公开涉及一种电池模块,更特别地,涉及一种具有改进的电压感测部件的组装结构的电池模块,所述电压感测部件诸如为电池单体的电压感测所要求的汇流条、感测构件和连接器。
本申请要求2020年11月10日在韩国提交的韩国专利申请第10-2020-0149664号的优先权,其公开内容通过引用并入本文。
背景技术
能够将电能转换成化学能并且重复进行充电和放电的半永久电池被称作二次电池,以能够区别于在使用一次之后便不可再使用的一次电池。
二次电池的示例包括锂二次电池、镍镉(Ni-Cd)电池、铅酸电池、镍金属氢化物(Ni-MH)电池、锌空气电池和碱锰电池。其中,铅酸电池和锂二次电池可能是商业化程度最高的二次电池。
特别地,由于能量密度高、重量轻、体积小、安全性优良、放电率低并且寿命长的优点,锂二次电池近来已经被积极地用作用于电动车辆的电池。作为参考,锂二次电池通常根据制造形状被分类成圆柱形、方形和袋型电池,并且除了用作用于电动车辆的电池,还可以用作用于能量存储系统(ESS)和其他电气装置的电池。
当前,可能无法从仅仅一个锂二次电池(单体)获得足够的输出来驱动电动车辆。为了应用二次电池作为用于电动车辆的能源,应该构造多个锂离子电池单体被串联和/或并联连接的电池模块,并且通常构造电池组,该电池组包括用于串联连接电池模块并且在功能上维持电池模块的电池管理系统(BMS)、冷却系统、电池断开单元(BDU)、线束等。
当电池模块如在图1中所示地包括袋型二次电池单体时,为了二次电池单体的串联和/或并联连接,该袋型二次电池单体的电极引线1a、1b被焊接到位于电池模块的前部或者前部和后部上的汇流条3。
为了二次电池单体的电压感测,柔性印刷电路板(FPCB)5被连接到每一个汇流条3。二次电池单体的电压信息通过安装在FPCB 5上的连接器7被传输到BMS(未示出),并且BMS监测每一个二次电池单体的状态并且基于二次电池单体的电压信息来控制充电和放电。
在根据现有技术的电池模块中,每一个汇流条3被激光焊接到每一个FPCB的对应的感测端子5a,以将FPCB 5连接到汇流条3。在此情形中,发生很多焊接缺陷,并且不容易进行焊接质量管理。在上述组装过程中,通常比印刷电路板(PCB)更昂贵的FPCB经常由于焊接缺陷而被废弃。而且,连接器的连接器引脚被钎焊在FPCB上。在此情形中,连接器的安装过程也不容易,并且认为包括钎焊在FPCB上的连接器引脚的连接器易受冲击或振动所影响。
发明内容
技术问题
本公开被设计成解决相关技术的问题,并且因此本公开旨在提供一种电池模块,在该电池模块中,与相关技术相比,用于电压感测的汇流条、感测构件和连接器的组装结构更容易并且更稳固。
本领域普通技术人员将容易理解,本公开的其他目的能够通过在以下描述和权利要求中示出的手段及其组合来实现。
技术方案
根据本公开的实施例,一种电池模块包括:单体堆,所述单体堆包括在一个方向上堆叠的多个电池单体;和感测模块,所述感测模块位于所述单体堆的前部或后部上,以用于所述多个电池单体的电压感测和电连接,其中,所述感测模块包括:主框架,所述主框架被形成为覆盖所述单体堆的前表面或后表面,并且包括多个引线孔,所述多个电池单体的电极引线通过所述多个引线孔被抽出;多个汇流条,所述多个汇流条位于所述主框架上,以在一个方向上彼此间隔开;和印刷电路板,所述印刷电路板由刚性材料形成,所述印刷电路板包括多个感测尖端,所述多个感测尖端被可拆卸地设置在对应的汇流条上,并且所述印刷电路板被附接到所述主框架。
所述主框架可以包括:汇流条安装部,所述汇流条安装部凹进以对应于所述多个汇流条中的每一个汇流条;和板安装部,所述板安装部被设置在所述汇流条安装部的上方,并且凹进以对应于所述印刷电路板。
所述多个感测尖端中的每一个感测尖端可以包括:基部,所述基部被钎焊到所述印刷电路板;和连接部,所述连接部从所述基部以一定长度延伸,并且通过向前或向后旋转而被附接到所述汇流条或者从所述汇流条拆卸。
所述连接部可以包括被弯曲的端部,其中,所述汇流条包括狭缝,所述连接部的所述端部被挤压装配到所述狭缝中。
所述连接部的所述端部可以包括一个或多个凸部,所述一个或多个凸部被形成为凸形样式。
所述汇流条可以被设置成框架形状,以包围所述引线孔的外部。
所述感测模块可以进一步包括直接连接器,所述直接连接器被直接地连接到所述印刷电路板的边缘。
所述直接连接器可以包括:连接器外罩,所述连接器外罩包括上板部和下板部,所述上板部接触所述印刷电路板的表面,所述下板部接触所述印刷电路板的另一个表面并且与所述印刷电路板的所述边缘接合;和连接器端子,所述连接器端子被设置在所述连接器外罩中,并且接触被设置在所述印刷电路板的表面上的导线。
空的空间可以被设置在所述印刷电路板的所述边缘的一部分与所述主框架的前表面之间,以连接所述连接器外罩。
根据本公开的另一个方面,一种电池组包括所述电池模块。
有利效果
根据本公开的一个方面,可以提供一种电池模块,在该电池模块中,与相关技术相比,用于电压感测的汇流条、感测构件和连接器的组装结构更容易并且更稳固。
根据本公开,因为使用刚性的印刷电路板作为感测构件,并且该刚性的印刷电路板的感测尖端可以被可拆卸地挤压装配到汇流条中,所以感测尖端和汇流条可以容易组装并且当有必要时可以执行再加工。
而且,根据本公开,因为组装结构被形成为使得连接器不被安装而是与印刷电路板机械接合,所以与在现有技术中相比,连接器可以被更容易且牢固地组装在刚性的印刷电路板上。
通过本公开的以下实施例,将更清楚地理解本公开的效果。还将容易理解,本公开的效果能够通过在本公开的权利要求中示出的手段及其组合来实现。
附图说明
图1是图示根据现有技术的电池模块的前表面的一部分的局部立体图。
图2是图示根据本公开的实施例的电池模块的构造的立体图。
图3是图示根据本公开的实施例的感测模块的立体图。
图4是图示图3的感测模块的分解立体图。
图5是图示根据本公开的实施例的在感测尖端和汇流条被连接之前的状态的视图。
图6是图示根据本公开的实施例的在感测尖端和汇流条被连接之后的状态的截面视图。
图7是图6的局部放大视图。
图8是图示根据本公开的实施例的在刚性的印刷电路板和连接器之间的组装结构的放大视图。
具体实施方式
在下文中,将参考附图详细描述本公开的优选实施例。在描述之前,应该理解,在说明书和所附权利要求中使用的术语不应该被理解为被限制于一般的和词典的含义,而是在允许本发明人为了最佳解释而适当地定义术语的原则的基础上,基于对应于本公开的技术方面的含义和概念来解释。因此,本文中提出的描述只是仅仅为了说明的目的的优选示例,而非旨在限制本公开的范围,从而应该理解,能够在不偏离本公开的范围的情况下对其做出其他等同和修改。
提供这些实施例使得该公开将是彻底的且完整的,并且将向本领域普通技术人员充分地传达本公开的范围。相应地,为了清楚起见,绘图中所示的每一个元件的厚度和尺寸可能被夸大、省略或者示意性地绘制。相应地,每一个元件的尺寸不完全反应实际尺寸或比率。
图2是图示根据本公开的实施例的电池模块的构造的立体图。图3是图示根据本公开的实施例的感测模块的立体图。图4是图示图3的感测模块的分解立体图。
参考图2到图4,根据本公开的实施例的一种电池模块包括单体堆100、感测模块200、前盖300和后盖400。
单体堆100可以是一组电池单体110。例如,单体堆100可以通过在上下方向上竖立电池单体110并且在左右方向上堆叠电池单体来形成。电池单体110是指袋型电池单体110。本实施例的电池单体110是双向引线型袋型电池单体,在该双向引线型袋型电池单体中,正电极引线和负电极引线被定位成彼此相反。
袋型电池单体110包括电极组件、电解溶液以及用于封装电极组件和电解溶液的袋外壳。电极组件具有如下结构:正电极板、分隔件和负电极板被重复地堆叠,并且正电极板和负电极板中的每一个包括电极接线片。在袋外壳的内部,一个或多个电极接线片被连接到电极引线111,并且电极引线111延伸到袋外壳的外部,以在功能上用作电池单体110的电极端子。
用于密封和容纳电极组件和电解溶液的袋外壳可以包括金属薄膜,例如铝薄膜,以补充电化学性能并且改进电极组件和电解溶液的散热。铝薄膜可以位于内部粘结层和由绝缘材料形成以确保电绝缘的绝缘层之间。
感测模块200被安装在每一个电池单体110的电极引线111所位于的单体堆10的前部和后部上。
用于电池单体110的电连接以及电压和温度感测的感测模块200包括主框架210、多个汇流条220、印刷电路板230和直接连接器240。
作为板形结构的主框架210可以具有与单体堆100的前部(或后部)对应的面积,并且可以被设置成覆盖单体堆100的前表面(或后表面)。主框架210可以通过注射模制由诸如塑料的绝缘材料形成。
单体堆100的前部(或后部)可以由主框架210覆盖,并且每一个电池单体110的电极引线111可以通过被形成在主框架210中的多个引线孔213被抽出,并且可以被焊接到对应的汇流条220。
根据本实施例的主框架210在前表面上包括汇流条安装部211、板安装部212和连接器连接部O。汇流条安装部211、板安装部212和连接器连接部O被设置用于汇流条220与下文描述的感测尖端231之间的连接和分离、刚性的印刷电路板230的稳定安设以及直接连接器240的连接空间的确保。
汇流条安装部211被布置在主框架210的在左右方向上的中央部分处,并且均凹进以对应于将被安装的汇流条220的形状。即,汇流条安装部211具有与汇流条220的宽度和厚度对应的宽度和深度。对应于汇流条安装部211的每一个汇流条220被插入,从而在主框架210的表面和汇流条220的表面之间不形成阶形部分。换言之,当汇流条220被插入汇流条安装部211中时,汇流条220不突出到主框架210的表面的外部。
印刷电路板230将被组装在此处的板安装部212可以被设置在汇流条安装部211的上方或下方。在本实施例中,板安装部212被形成在汇流条安装部211的正上方。板安装部212凹进以对应于印刷电路板230的形状。即,板安装部212具有与印刷电路板230的宽度和厚度对应的宽度和深度。类似于汇流条安装部211,印刷电路板230被插入板安装部212中,从而在主框架210的表面和印刷电路板230的表面之间不形成阶形部分。当印刷电路板230被插入板安装部212中时,印刷电路板230可以通过使用螺栓B或者通过使用粘结剂或胶带而不是螺栓来固定。
在这种构造中,汇流条220的表面和印刷电路板230的表面在同一平面上。在此情形中,汇流条220和感测尖端231可以容易被连接,这将在下文详细地描述。
连接器连接部O是板安装部212的边缘的凹进部分。因为设置了连接器连接部O,所以可以在印刷电路板230的边缘和主框架210之间确保一定空间,并且直接连接器240可以通过该空间被连接,以与印刷电路板230的边缘接合。
因为电池单体110的电极引线111的机械刚性不足,所以使用汇流条220用于电池单体110的稳定电连接。汇流条220可以由铜、铝或其覆层金属形成。
多个汇流条220可以通过被符合地插入主框架210的汇流条安装部211中来固定。虽然未示出,但是可以另外地使用粘结剂、挂钩或螺栓来固定汇流条220。
在本实施例中,六个汇流条220以相等的间隔被布置在单体堆100的前主框架210上,并且五个汇流条(未示出)以相等的间隔被布置在单体堆100的后主框架210上。汇流条220可以被形成为各种形状中的任一种,诸如直条形状、U形形状或者四边形框架形状。
其中,因为具有四边形框架形状的汇流条220可以被安装在主框架210上以包围引线孔213的外部,电极引线111可以被从引线孔213抽出,并且然后电极引线111中的一些电极引线可以被焊接到四边形框架的左部并且其余电极引线可以被焊接到四边形框架的右部,所以可以容易焊接大量的电极引线111。
相应地,在本实施例中,使用具有四边形框架形状的汇流条220。汇流条220中的两个汇流条用作电池模块的正电极端子和负电极端子。为此目的,正电极端子T1和负电极端子T2的形状被添加到作为前主框架210上的最外面的汇流条的第一汇流条220和第六汇流条220。
在这种构造中,第一组的电池单体110的正电极引线被焊接到前主框架210的第一汇流条220,并且第一组的电池单体110的负电极引线随同第二组的电池单体110的正电极引线一起被焊接到后主框架210的第一汇流条220。接着,第二组的电池单体110的负电极引线和第三组的电池单体110的正电极引线被焊接到前主框架210的第二汇流条220。以这种样式,最后一组的电池单体110的负电极引线被焊接到前主框架210的第六汇流条220。(第N组的电池单体110是指成捆的一个或多个电池单体110。)在此情形中,构成单体堆100的所有的电池单体110可以通过多个汇流条220被串联和/或并联连接。
如上所述,电池单体110以组或捆为单位通过汇流条220被串联连接。在此情形中,可以通过测量每一个汇流条220处的电压来确定被串联连接的电池单体110中的每一个电池单体的电压。
印刷电路板230可以被用作用于感测每一个汇流条220处的电压的感测构件。因为印刷电路板230可以在电池模块中占据小的空间的同时传输大量信号或电力,所以印刷电路板230可以被有效地用作电压感测构件。
在现有技术中,能够进行三维(3D)布线的柔性印刷电路板(FPCB)已经被广泛用作感测构件。然而,FPCB存在的问题在于,FPCB易受冲击影响并且昂贵,并且如在背景技术中描述地,当FPCB被连接到汇流条220时应该执行激光焊接。相应地,本公开使用可以被牢固地附接到主框架210的由刚性材料形成的印刷电路板230,而不是FPCB。
如在图3和图4中所示,根据本公开的实施例的由刚性材料形成的印刷电路板230可以包括被可拆卸地设置在汇流条220上的多个感测尖端231以及均被构造成传输每一个感测尖端231的信号的导线232,并且可以被固定地附接到板安装部212。在此情形中,因为印刷电路板230由刚性材料形成,所以印刷电路板230可以通过使用螺栓B被牢固地固定到板安装部212。
多个感测尖端231中的每一个感测尖端可以包括:基部231a,该基部231a被钎焊到印刷电路板230;和连接部231b,该连接部231b从基部231a以一定长度延伸,并且通过向前或向后旋转而被附接到汇流条220或者从汇流条220拆卸。
而且,如在图5中所示,连接部231b包括被以大约90°的角度弯曲的端部231c。汇流条220包括狭缝221,该狭缝221通过在厚度方向上以一定深度切割而形成。狭缝221被形成在当感测尖端231旋转时连接部231b的端部231c可以插入的位置处。
在这些构造中,如在图6中所示,通过在汇流条220和印刷电路板230被附接到主框架210的状态中旋转感测尖端231的连接部231b,连接部231b的端部231c可以被挤压装配到汇流条220的狭缝221中。
如上所述,汇流条220和印刷电路板230分别地位于汇流条安装部211和板安装部212上,使得汇流条220的表面和印刷电路板230的表面在同一平面上。相应地,当通过旋转感测尖端231的连接部231b而将连接部231b的端部231c插入汇流条220的狭缝221中时,连接部231b的其余部分可以以平行于连接部231b的表面的方式被紧密地附接。
而且,感测尖端231可以包括在连接部231b的端部231c上被形成为凸形样式的至少一个凸部231d。参考图7,根据本实施例的感测尖端231在连接部231b的端部231c上包括呈非平坦或凸形样式的凸部231d。当连接部231b的端部231c被插入汇流条220的狭缝221中时,凸部231d的一部分与狭缝221的内壁表面碰撞并且被压缩。在此情形中,施加了凸部231d的恢复力,使得强力地维持在狭缝221的内壁表面和凸部231d之间的接触。
而且,为了允许连接部231b的端部231c的一端被卡在狭缝221外部,连接部231b的端部231c的一端可以具有环形形状231e,使得连接部231b不容易从狭缝221分离。
在这种构造中,当感测尖端231和汇流条220被连接时,可以容易且快速地执行连接,并且当有必要时可以执行分离,因此与在感测尖端231和汇流条220之间进行激光焊接相比较,还能够更换汇流条220和印刷电路板230中的仅仅一个。
直接连接器240可以被用于将由印刷电路板230的感测尖端231感测的电池单体110的电压信息传输到电池管理系统(BMS)(未示出)。
如在图8中所示,根据本公开的实施例的直接连接器240可以被设置成被直接地连接到印刷电路板230的边缘。
详细地,直接连接器240可以包括:连接器外罩,该连接器外罩被插入印刷电路板230中并且与印刷电路板230接合;多个连接器端子,所述多个连接器端子被设置在连接器外罩中;和多个线缆244,所述多个线缆244以一对一方式被连接到多个连接器端子并且延伸到外部。
连接器外罩包括:上板部241a和下板部241b,该上板部241a和该下板部241b形成用于容纳连接器端子的空间;以及闩锁部242和板保持引线243,该闩锁部242和该板保持引线243形成用于印刷电路板230的锁定装置。
上板部241a和下板部241b可以形成连接器外罩的本体。上板部241a和下板部241b被形成为使得:前部以印刷电路板230的厚度彼此间隔开从而以一定深度插入印刷电路板230的边缘中,并且后部彼此连接以形成一体。
当连接器外罩被连接到印刷电路板230的边缘时,上板部241a的前侧接触印刷电路板230的前表面,并且下板部241b的前侧接触印刷电路板230的后表面,并且闩锁部242和板保持引线243被另外地联接到印刷电路板230,以防止直接连接器240的移动。插入孔可以被形成在上板部241a和下板部241b的后部中,连接器端子可以被单独地插入该插入孔中。
而且,在本实施例中,空的空间被设置在印刷电路板230的边缘的一部分与主框架210的前表面之间。该空的空间对应于主框架210的连接器连接部O。因为连接器外罩的下板部241b可以位于该空的空间中,所以直接连接器240可以被连接到印刷电路板230的边缘而不受主框架210的上端妨碍。
如上所述,在根据本公开的电池模块中,因为印刷电路板230的感测尖端231可以被可拆卸地挤压装配到汇流条220中,所以感测尖端231和汇流条220可以容易组装,并且当有必要时可以执行再加工。而且,因为组装结构被形成为使得直接连接器240与印刷电路板230机械接合,所以与在现有技术中相比,连接器可以被更牢固且容易地安设。
根据本公开的一种电池组可以包括一个或多个根据本公开的电池模块。而且,除了所述电池模块,根据本公开的电池组可以进一步包括用于容纳电池模块的电池组外壳以及用于控制每一个电池模块的充电和放电的各种装置,例如主BMS、电流传感器和熔断器。
根据本公开的电池模块可以被应用于车辆,诸如电动车辆或者混合动力车辆。即,该车辆可以包括根据本公开的电池模块。
虽然已经参考实施例和附图描述了本公开的一个或多个实施例,但是本公开不限于此,并且本领域普通技术人员将会理解,在不偏离如由所附权利要求限定的本公开的范围的情况下,可以在其中做出形式和细节的各种变化。
本领域普通技术人员将会理解,当使用诸如上、下、左、右、前和后的指示方向的术语时,这些术语仅仅是为了解释方便,并且可以根据目标物体的位置、观察者的位置等而改变。
Claims (10)
1.一种电池模块,包括:
单体堆,所述单体堆包括在一个方向上堆叠的多个电池单体;和
感测模块,所述感测模块位于所述单体堆的前部或后部上,以用于所述多个电池单体的电压感测和电连接,
其中,所述感测模块包括:
主框架,所述主框架被形成为覆盖所述单体堆的前表面或后表面,并且包括多个引线孔,所述多个电池单体的电极引线通过所述多个引线孔被抽出;
多个汇流条,所述多个汇流条位于所述主框架上,以在一个方向上彼此间隔开;和
印刷电路板,所述印刷电路板由刚性材料形成,所述印刷电路板包括可拆卸地设置在对应的汇流条上的多个感测尖端,并且所述印刷电路板被附接到所述主框架。
2.根据权利要求1所述的电池模块,其中,所述主框架包括:
汇流条安装部,所述汇流条安装部凹进以对应于所述多个汇流条中的每一个汇流条;和
板安装部,所述板安装部被设置在所述汇流条安装部的上方,并且凹进以对应于所述印刷电路板。
3.根据权利要求1所述的电池模块,其中,所述多个感测尖端中的每一个感测尖端包括:
基部,所述基部被钎焊到所述印刷电路板;和
连接部,所述连接部从所述基部以一定长度延伸,并且通过向前或向后旋转而被附接到所述汇流条或者从所述汇流条拆卸。
4.根据权利要求3所述的电池模块,其中,所述连接部包括被弯曲的端部,
其中,所述汇流条包括狭缝,所述连接部的所述端部被挤压装配到所述狭缝中。
5.根据权利要求4所述的电池模块,其中,所述连接部的所述端部包括一个或多个凸部,所述一个或多个凸部被形成为凸形样式。
6.根据权利要求1所述的电池模块,其中,所述汇流条被设置成框架形状,以包围所述引线孔的外部。
7.根据权利要求1所述的电池模块,其中,所述感测模块进一步包括直接连接器,所述直接连接器被直接地连接到所述印刷电路板的边缘。
8.根据权利要求7所述的电池模块,其中,所述直接连接器包括:连接器外罩,所述连接器外罩包括上板部和下板部,所述上板部接触所述印刷电路板的表面,所述下板部接触所述印刷电路板的另一个表面并且与所述印刷电路板的所述边缘接合;和连接器端子,所述连接器端子被设置在所述连接器外罩中,并且接触被设置在所述印刷电路板的表面上的导线。
9.根据权利要求8所述的电池模块,其中,空的空间被设置在所述印刷电路板的所述边缘的一部分与所述主框架的前表面之间,以连接所述连接器外罩。
10.一种电池组,包括根据权利要求1到9中的任一项所述的电池模块。
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