CN116686143A - 用于安装到电气化机动车中的电蓄能器的电池单体 - Google Patents
用于安装到电气化机动车中的电蓄能器的电池单体 Download PDFInfo
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Abstract
本发明涉及一种用于具有多个电池单体的用于安装到电气化机动车中的电蓄能器的电池单体。电池单体由电芯和混合单体壳体组成。所述混合单体壳体设计为内部部分壳体与外部部分壳体的组合,其中,设置有保护装置,通过该保护装置能在(优选热)故障情况下将电芯连同内部部分壳体从外部部分壳体中抛出。特别优选地,外部部分壳体在相对于抛出方向的相反方向上具有气密的封闭部,通过该封闭部产生气密的空腔,在该空腔中例如在导致内部部分壳体破裂的事件中通过气体有针对性地产生压力,该压力用于沿抛出方向抛出内部部分壳体。
Description
技术领域
本发明涉及一种用于安装到电气化机动车(电动车辆或混合动力车辆)中的电蓄能器、特别是用于锂离子储存器的电池单体,所述电蓄能器用作车载电池、高压储存器或牵引电池。
背景技术
在本申请人的官方文件号为DE102020126424的未在先公开的德国专利申请中描述了一种蓄能器(以锂离子储存器的形式),该蓄能器具有带有多个电池单体(若干个储存器单体)的在壳体中的“单体包”,这些电池单体相对于车辆下侧竖直地定向。为了克服来自下方的力作用而稳定,这些电池单体集成在由多个支承元件构成的框架中,所述支承元件作为单体的吸收力的壳体延长部起作用。
本申请人的未在先公开的DE102021102017涉及一种用于安装到电气化机动车中的具有多个电池单体的电蓄能器,其中,每个电池单体由电芯和混合单体壳体组成,该混合单体壳体通过由电绝缘材料制成的以内部单体壁形式的内部部分壳体和由能导电且能导热的材料制成的以单体保持架形式的外部部分壳体构成。在此,第一部分壳体和第二部分壳体通过机械连接共同形成混合单体壳体(混合壳体)。
发明内容
本发明的任务是,在温度事件方面进一步改进开头所述类型的用于蓄能器的电池单体。
该任务通过权利要求1的特征来解决。从属权利要求是本发明的有利的进一步扩展方案。
本发明涉及一种用于具有多个电池单体(特别是用于安装到电气化机动车中)的电蓄能器的电池单体。根据本发明的电池单体由电芯和混合单体壳体组成。混合单体壳体设计为内部部分壳体与外部部分壳体的组合,其中设置有保护装置,通过该保护装置能在(优选热)故障情况下将电芯连同内部部分壳体从外部部分壳体中抛出。
特别优选地,外部部分壳体在相对于抛出方向的相反方向上具有封闭部,通过该封闭部产生气密的空腔,在该空腔中能通过引入气体(例如在导致具有气体出口的内部部分壳体破裂的事件中,或者在附加地使用“微型气囊”时,其在更下面更详细地定义)有针对性地建立压力,该压力用于沿抛出方向抛出内部部分壳体。
本发明基于以下考虑:
现有技术
本发明优选从在本申请人的未在先公开的DE102020126424中描述的单体系统出发。
问题
在电储存器单体中,故障可能导致短时释放具有不确定的损坏输出的大量能量。
本发明的技术方案
提出一种具有保护功能的单体系统。该保护功能在于,在由于释放大量能量并且由此导致电池单体过热而出现单体失效的情况下能够将该单体从单体堆或者说储存器系统中抛出。
为了减少重量,根据本发明的电池单体优选由电芯(具有任意设计方案,例如作为电极卷)和类似于未在先公开的DE102020126424的技术方案的混合单体壳体(混合壳体)组成。混合单体壳体构造有内部单体壁(内部部分壳体)和由能导热的金属制成的外部单体保持架(外部部分壳体)。因此,混合壳体由两个部分壳体组成。由塑料制成的内部部分壳体重量轻并且导致重量减少。外部部分壳体由能导热的金属制成并且因此适合于调温。两个部分壳体一起附加地有助于克服机械力而稳定。但根据本发明的电池单体也可以由两个其它类型的部分壳体组成。
用于蓄能器的电子控制器的运行策略可以通过与合适的传感装置的组合来保存被抛出的单体的定位或者标识。对通过单体保持架的电能流(能量输送或能量导出)的操控优选通过作为电子控制器中的软件程序模块的储存器管理来进行。
附图说明
在附图中示出本发明的实施例。在附图中:
图1示出根据本发明的具有用于在热故障情况下抛出的保护装置的电池单体的主要部件,
图2示出根据本发明的电池单体在穿过障碍物(例如穿过蓄能器的底部)的抛出过程期间的第一状态,
图3示出根据本发明的电池单体在穿过障碍物的抛出过程期间的第二状态,以及
图4示出根据本发明的电池单体的特别是外部部分壳体在完全抛出之后的状态。
具体实施方式
图1示出具有混合壳体的电池单体1(储存器单元)的示意性结构。实施例涉及圆形的电池单体。但本发明也可以应用于其它的、例如棱柱形的电池单体。单体1例如具有两个能导电的接触导通盖5和6以及一个塑料圆柱体(例如PP、PTFE)作为混合单体壳体的内部部分壳体3。单体1的运行强度通过内部部分壳体3与以单体保持架形式的外部部分壳体4的组合来实现。
图1以侧视图示出内部部分壳体3到以单体保持架形式的外部部分壳体4中的示意性集成,所述内部部分壳体是电芯2的单体壁。
在该混合式单体结构中,优选在各圆柱体之间或者说在部分壳体3与4之间设置滑动层10、例如特氟龙PTFE,该滑动层在抛出的情况下能够减少摩擦。具有多个根据本发明的电池单体1的单体堆或者说储存器系统在此未整体示出,然而在图2至图4中示意性地示出这种单体堆或者说储存器系统的可能的底部。内圆柱体或者说部分壳体3在外圆柱体或者说部分壳体4中的电接触导通和锁定或者说固定优选借助环绕的、能导电的卷边11来实现。同样未示出多个电池单体接触导通并且布置成串联电路、例如变换的单体取向“…+-+-…”,因为这是已知的。非圆柱形的单体形状、例如棱柱形的单体形状同样被本发明所包括,然而在此没有特意示出。单体1的指向相对于抛出方向A的相反方向B的接触导通盖6优选设有额定断裂部位7,以便在故障情况下将流出的气体转向到上面的空腔9中。
图4描述在上面的气密的空腔9中的弹簧装置13。弹簧装置13可以以其预紧力在故障情况下辅助将内部部分壳体3的抛出。
在图1和图2中示出的云表示在故障情况下气体流出到空腔9中。
图1简示在故障情况下的气体压力的建立,并且图2至图4简示在单体抛出或电芯抛出的情况下内部部分壳体3的由此产生的运动。更准确地说,“单体抛出”是集成有电芯2的内部部分壳体3的抛出。
图2至图4示出在采用竖直储存器/单体结构的情况下储存器组件的底部14被内部部分壳体3穿过。
图1和图2在本发明的一个有利的进一步扩展方案中示出位于内部部分壳体3上的环绕的切割装置12,该切割装置用于辅助内部部分壳体3穿过底部14。
图2以点划线简示储存器系统的底部14中的额定断裂部位。该额定断裂部位同样辅助穿过底部14。
图3示出另一个有利的设计方案。在此,在底部14中设置具有膨胀材料、例如PU泡沫的储存器,其类似于应用于建筑的喷雾罐的工作方式,或者流出的滑动材料10设计为膨胀材料和/或粘接材料。在故障情况下,通过抛出开始膨胀,使得底部14在抛出之后再次封闭,以例如防止在抛出过程之后异物(例如水)的进入。图4简示由此实现的封闭。
图4同样示出储存器系统的紧急运行特性的产生。所述紧急运行特性在于有损坏的单体1的跨接或在抛出单体1、即移除单体1的情况下的电跨接接触导通。
图1中的弹簧装置13在松弛的状态下产生上面的和下面的环绕的卷边11的接触导通并且因此产生单体复合体内的电单体接触导通。因此,在故障情况下确保保持获得单体的串联电路。因此,储存器组件对于总电压降低了一个单体电压的紧急运行而言是有效的。这还可以通过传感装置(未详细示出)通知给能源管理系统。因此能够实现调整上级系统的运行策略。该上级系统可以是车辆的电驱动装置或者车辆的车载电网,其之后在所谓的“二次(second life)”使用的情况下也能用作建筑物的静态能量储存器系统。
能量管理系统的电子控制单元可以识别出抛出本身、单体抛出的位置和/或被抛出的单元1的标识。
下面借助图1至图4包括可能的有利的进一步扩展方案再次换句话来解释本发明的细节:
图1示出根据本发明的用于具有多个电池单体的电蓄能器的电池单体1,电蓄能器用于安装到电气化机动车中。电池单体1由电芯2和混合单体壳体组成,该混合单体壳体设计为由电绝缘材料制成的以内部单体壁形式的内部部分壳体3与由导电材料制成的以单体保持架形式的外部部分壳体4的组合。特别是,具有可选的额定断裂部位7的接触导通盖6、外部部分壳体4的壁和外部部分壳体4的气密封闭部8构成保护装置,通过该保护装置在(特别是热)故障情况下能将电芯2连同内部部分壳体3从外部部分壳体4中抛出。
外部部分壳体4沿抛出方向A是敞开的,但沿相对于抛出方向A的相反方向B例如以盖8气密地封闭。内部部分壳体3连同电芯2这样布置在外部部分壳体4中,使得在内部部分壳体3与封闭部8之间形成气密的空腔9,在该空腔中在导致内部部分壳体3破裂的热事件中由于逸出的热气体而产生压力,该压力能用于沿抛出方向A抛出内部部分壳体3。
也可设想在额定断裂部位7的区域中的产生附加气体的单元(“微型气囊”,也参见上文)。这例如可以是与气囊系统类似的点火器或者是在超过温度阈值的情况下产生附加气体(例如由于物质分解)的化学物质。这具有如下优点,即,能够在单体破裂之前已经由于不允许的过高温度而预测性地抛出单体,以便减少二次损坏。
内部部分壳体3沿抛出方向A具有不带材料削弱部的第一接触导通盖5,并且沿相反方向B具有带有材料削弱部(在此带有额定断裂部位7)的第二接触导通盖6。
优选地,在气密的空腔9中导电的弹簧装置13被预紧成,使得该弹簧装置在抛出之后在松弛的状态下用作接触跨接部(参见图4和在更上面对此的描述)。
在内部部分壳体3与外部部分壳体4之间可以引入滑动材料10,该滑动材料例如同时设计为具有预先给定的粘度和固化能力的膨胀材料和/或粘接材料,以便在抛出之后封闭底部14(参见图3和图4)。
在内部部分壳体3上分别设有用于正极(+)和负极(-)的卷边11,以用于与外部部分壳体4既保持锁紧、而且也电接触导通地锁紧。
当所述抛出不能无障碍地例如在收集容器中进行、而是例如必须以穿透单体包的底部14的方式进行时,内部部分壳体3可以沿抛出方向A具有切割装置12。
概括地,利用这种布置结构不仅能够防止在储存器系统和相邻系统和部件中较大损坏,而且能够有条件地保持功能性。后者例如在自主行驶的情况下提供安全优势。
Claims (8)
1.用于具有多个电池单体(1)的、特别是用于安装到电气化机动车中的电蓄能器的电池单体(1),所述电池单体(1)由电芯(2)和混合单体壳体组成,所述混合单体壳体设计为内部部分壳体(3)与外部部分壳体(4)的组合,其中,设置有保护装置,通过所述保护装置能在故障情况下将所述电芯(2)连同所述内部部分壳体(3)从所述外部部分壳体(4)中抛出。
2.权利要求1所述的电池单体(1),其特征在于,所述外部部分壳体(4)沿抛出方向(A)是敞开的,但沿相反方向(B)具有封闭部(8),并且所述内部部分壳体(3)连同所述电芯(2)设置在所述外部部分壳体(4)中,使得在所述内部部分壳体(3)与所述封闭部(8)之间形成气密的空腔(9),在所述空腔中能通过引入气体建立压力,所述压力能用于沿抛出方向(A)抛出所述内部部分壳体(3)。
3.根据前述权利要求中任一项所述的电池单体(1),其特征在于,所述内部部分壳体(3)沿抛出方向(A)具有不带材料削弱部的第一接触导通盖(5),并且沿相反方向(B)具有带有材料削弱部(7)的第二接触导通盖(6)。
4.根据前述权利要求中任一项所述的电池单体(1),其特征在于,在所述气密的空腔(9)中,导电的弹簧装置(13)被预紧成,使得该弹簧装置在抛出之后在松弛的状态下用作接触跨接部。
5.根据前述权利要求中任一项所述的电池单体(1),其特征在于,在所述内部部分壳体(3)与所述外部部分壳体(4)之间引入滑动材料(10)。
6.根据前项权利要求所述的电池单体(1),其特征在于,所述滑动材料(10)同时设计为膨胀材料和/或粘接材料并且在抛出时流出。
7.根据前述权利要求中任一项所述的电池单体(1),其特征在于,在所述内部部分壳体(3)上分别设置有卷边(11)或槽,以用于与所述外部部分壳体(4)并且与电极接头(+、-)既保持锁紧、而且也电接触导通地锁紧。
8.根据前述权利要求中任一项所述的电池单体(1),其特征在于,所述内部部分壳体(3)沿抛出方向(A)具有切割装置(12)。
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PCT/EP2022/057398 WO2022223213A1 (de) | 2021-04-22 | 2022-03-22 | Batteriezelle für einen elektrischen energiespeicher zum einbau in ein elektrifiziertes kraftfahrzeug |
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