CN107968167A - 用于牵引电池的袋型电池单元组件 - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Chemical & Material Sciences (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
本公开涉及用于牵引电池的袋型电池单元组件。一种用于牵引电池的袋型电池单元组件包括壳体、第一中间端子构件和第一端子极耳。壳体限定有腔。第一中间端子构件至少部分地设置在所述壳体内,并限定有通向所述壳体的外部和所述腔的进出口,所述进出口的尺寸可适于电解质注入。第一端子极耳嵌入在第一中间端子构件内。压敏释放机构可设置在所述进出口内以选择性地从所述腔排出气体。第二中间端子构件可至少部分地设置在所述壳体内,第二端子极耳可嵌入在第二中间端子构件内。
Description
技术领域
本公开涉及用于在车辆中使用的牵引电池的电池单元组件。
背景技术
袋型电池单元用于为电气化车辆的部件供电。袋型电池单元可以以阵列的方式彼此电连接。在袋型电池单元的使用和制造中,电极极耳处的密封鲁棒性、排气口控制以及电解质填充是存在挑战的三个方面。
发明内容
一种用于牵引电池的袋型电池单元组件包括壳体、第一中间端子构件和第一端子极耳。壳体限定有腔。第一中间端子构件至少部分地设置在所述壳体内,并限定有通向所述壳体的外部和所述腔的进出口。第一端子极耳嵌入在第一中间端子构件内。压敏释放机构可设置在所述进出口内以选择性地从所述腔排出气体。第二中间端子构件可至少部分地设置在所述壳体内,第二端子极耳可嵌入在第二中间端子构件内。第一中间端子构件和第二中间端子构件可以是单个部件。所述进出口的尺寸可适于使气体从所述腔排出。所述进出口的尺寸可适于接收电解质的注入以将电解质输送到所述腔内。密封件可设置在第一中间端子构件和所述壳体之间。
一种袋型电池单元组件包括壳体、中间端子结构和一对端子极耳。壳体限定有腔。中间端子结构至少部分地设置在所述壳体内,并包括第一构件和第二构件以及连接所述第一构件和所述第二构件的中间部分,所述中间部分限定通向所述壳体的外部和所述腔的进出口。每个端子极耳嵌入在所述第一构件和所述第二构件中的一个内,并从所述腔延伸到所述壳体外部的位置。所述端子极耳和所述中间端子结构可彼此布置为使得每个端子极耳与所述进出口等距地间隔开。所述中间端子结构可以是注射成型的。排气机构可设置在所述进出口内以选择性地从所述腔排出气体。所述进出口的尺寸可适于接收电解质的注入以将电解质输送到所述腔内。所述第一构件和所述第二构件中的每个构件可以呈杏仁状、泪滴状或细长的菱形形状。所述壳体可以由真空密封的铝层压板或保形聚合物制成。
一种车辆包括用于选择性地对车辆的部件供电的牵引电池。牵引电池包括袋型电池单元组件的阵列。每个袋型电池单元组件包括壳体、中间端子结构和一对端子极耳。壳体限定有腔。中间端子结构至少部分地设置在所述壳体内并限定有进出口。所述一对端子极耳中的每个端子极耳嵌入在所述中间端子结构内。所述中间端子结构和所述壳体彼此布置为使得所述进出口通向所述腔和所述壳体外部的位置。所述中间端子结构可包括第一构件和第二构件,所述第一构件被注射成型以接纳所述一对端子极耳中的一个,所述第二构件被注射成型以接纳所述一对端子极耳中的另一个。密封件可设置在所述中间端子结构和所述壳体之间。所述中间端子结构和所述壳体还可彼此布置为使得所述一对端子极耳中的每个端子极耳从所述腔延伸到所述壳体外部的位置。排气机构可设置在所述进出口内以选择性地从所述腔释放气体。所述壳体可由真空密封的铝层压板/保形聚合物制成。
附图说明
图1A是描绘电动车辆的示例的示意图。
图1B是部分分解地示出的并包括袋型电池单元的牵引电池的一部分的示例的透视图。
图1C是图1B的牵引电池总成的袋型电池单元的示例的透视图。
图1D是分解地示出的图1C的袋型电池单元的示例的透视图。
图2是示出有两个端子组件的示例的袋型电池单元的示例的透视图。
图3是图2的袋型电池单元的截面形式的主视图。
图4是图2的两个端子组件中的一个的一部分的分解视图。
图5是图2的端子组件中的一个的一部分的透视图。
图6是用于图2的袋型电池单元的端子组件的另一示例的透视图。
具体实施方式
在此描述本公开的实施例。然而,应当理解的是,所公开的实施例仅为示例并且其它实施例可以采用各种可替代形式。附图不一定按比例绘制;可夸大或最小化一些特征以示出特定部件的细节。因此,在此公开的具体结构和功能细节不应被解释为限制,而仅仅作为用于教导本领域技术人员以多种形式利用本公开的实施例的代表性基础。如本领域普通技术人员将理解的,参照任一附图示出和描述的各个特征可以与在一个或更多个其它附图中示出的特征进行组合以产生未明确示出或描述的实施例。示出的特征的组合为典型应用提供代表性实施例。然而,与本公开的教导一致的特征的各种组合和变型可期望用于特定应用或实施方式。
图1A描绘了电气化车辆(在此总体上称为车辆12)的示例的示意图。车辆12可包括机械地连接至混合动力传动装置16的一个或更多个电机14。电机14能够作为马达或发电机运转。此外,混合动力传动装置16机械地连接至发动机18。混合动力传动装置16还机械地连接至驱动轴20,驱动轴20机械地连接至车轮22。电机14可在发动机18开启或关闭时提供推进和减速能力。电机14还用作发电机并且可以通过回收在摩擦制动系统中通常将作为热损失的能量而提供燃料经济性效益。由于在特定状况下车辆12可以以电动模式或混合动力模式运转以减少车辆12的总燃料消耗,因此电机14还可提供减少的污染排放。
牵引电池或电池组24存储并提供可由电机14使用的能量。牵引电池24通常从牵引电池24内的一个或更多个电池单元阵列(有时称为电池单元堆)提供高电压DC输出。电池单元阵列可包括一个或更多个电池单元。电池单元的示例包括袋型电池单元和棱柱型电池单元。牵引电池24通过一个或更多个接触器(未示出)电连接至一个或更多个电力电子模块26。一个或更多个接触器在断开时将牵引电池24与其它部件隔离并在闭合时将牵引电池24连接至其它部件。电力电子模块26还电连接至电机14并在牵引电池24和电机14之间提供双向传输电能的能力。例如,典型的牵引电池24可提供DC电压而电机14可能需要三相AC电压来运转。电力电子模块26可以将DC电压转换为电机14需要的三相AC电压。在再生模式中,电力电子模块26可将来自用作发电机的电机14的三相AC电压转换为牵引电池24需要的DC电压。对于纯电动车辆,混合动力传动装置16可以是连接至电机14的齿轮箱并且可以没有发动机18。
牵引电池24除了提供用于推进的能量之外,还可为其它车辆电气系统和部件提供能量。系统的示例包括DC/DC转换器模块28,DC/DC转换器模块28将牵引电池24的高电压DC输出转换为与其它车辆负载兼容的低电压DC供应。其它高电压负载(诸如,压缩机和电加热器)可直接连接到高电压而不使用DC/DC转换器模块28。在典型的车辆中,低电压系统电连接至辅助电池30(例如,12V电池)。
电池电气控制模块(BECM)33可与牵引电池24通信。BECM 33可用作牵引电池24的控制器并且还可包括管理每个电池单元的温度和荷电状态的电子监测系统。牵引电池24可具有温度传感器31,诸如热敏电阻或其它温度计。温度传感器31可与BECM 33通信以提供关于牵引电池24的温度数据。温度传感器31还可位于牵引电池24内的电池单元上或其附近。还可以设想可使用一个以上的温度传感器31监测电池单元的温度。
车辆12可以是(例如)可通过外部电源36对牵引电池24进行再充电的电动车辆(诸如,插电式电动车辆(“PHEV”)、轻度混合动力电动车辆(“MHEV”)或电池电动车辆(“BEV”))。外部电源36可以连接至电插座。外部电源36可电连接至电动车辆供电设备(EVSE)38。EVSE38可提供调节和管理电源36和车辆12之间的电能传输的电路和控制。外部电源36可将DC或AC电功率提供至EVSE 38。EVSE 38可具有用于插入到车辆12的充电端口34中的充电连接器40。充电端口34可以是配置为将电力从EVSE 38传输至车辆12的任何类型的端口。充电端口34可电连接至充电器或车载电力转换模块32。电力转换模块32可调节从EVSE 38供应的电力以将适合的电压和电流水平提供至牵引电池24。电力转换模块32可以与EVSE 38交互以协调至车辆12的电力输送。EVSE连接器40可具有与充电端口34的对应凹入(recess)匹配的插脚。
所讨论的各个部件可具有控制和监测部件的操作的一个或更多个关联的控制器。控制器可以经由串联总线(例如,控制器局域网(CAN))或经由离散导体进行通信。
电池单元可包括将储存的化学能转换为电能的电化学电池单元。每个电池单元可包括壳体、正极(阴极)和负极(阳极)。电解质可允许离子在放电期间在阳极和阴极之间移动并且在再充电期间返回。端子可允许电流从电池单元流出以供车辆12使用。当以多个电池单元成阵列的方式布置电池单元时,每个电池单元的端子可以与彼此相邻的相对端子(正和负)对齐,并且汇流条可有助于促进多个电池单元之间的串联连接。电池单元还可并联布置使得相似端子(正和正,或负和负)彼此相邻。例如,两个电池单元可以布置为使正端子彼此相邻,接下来的两个电池单元可以布置为使负端子彼此相邻。在这个示例中,汇流条可接触所有四个电池单元的端子。可以使用液体热管理系统、空气热管理系统或本领域已知的其它方法对牵引电池24进行加热和/或冷却。
图1B示出了包括袋型电池单元的牵引电池总成(在此总体上称为牵引电池总成50)的一部分的示例。牵引电池总成50包括具有多个袋型电池单元的电池单元阵列54。每个袋型电池单元可包括保持件,保持件围绕电池单元的主侧并辅助将袋型电池单元固定在电池单元阵列54内。控制板58可设置在电池单元阵列54的一侧上。例如,控制板58可设置在电池单元阵列54的端子侧上。控制板58可包括用于接纳每个袋型电池单元的端子的插槽。端子经由焊接、钎焊或其它方式与控制板58的高电压总线电连接。控制板58与一个或更多个车辆控制器电连接。牵引电池总成50还包括围绕牵引电池总成50的内部部件的壳体。壳体可包括底部60、顶部62和前盖64。
图1C和图1D示出了袋型电池单元(在此称为袋型电池单元70)的示例。袋型电池单元70可具有位于袋72中的层叠结构。袋型电池单元70包括具有电池极耳或端子极耳76的阴极结构74、具有电池极耳或端子极耳80的阳极结构78以及设置在阴极结构74和阳极结构78之间的分隔件82。在将层叠的层组装在一起并将其插入到袋72中之后,对袋72填充电解质,并随后以使得端子极耳76和端子极耳80延伸到袋72外部的方式进行密封。袋型电池单元70可以是具有电解质的锂离子电池。阴极结构74可包含Al箔或Ni箔集电器(currentcollector),阳极结构78可包含铜箔或镍箔集电器。
图2和图3示出了用于牵引电池的电池单元组件(在此总体上称为电池单元组件100)的示例。电池单元组件100可以被构造为袋型电池单元组件或棱柱型电池单元组件。多于一个的电池单元组件100可以以阵列的方式对齐,使汇流条与并联或串联的电池单元组件100互连以为车辆部件提供电力。例如,多个电池单元组件100可以在牵引电池(诸如,上文描述的牵引电池24)内彼此电连通。
电池单元组件100可包括壳体104、第一中间端子构件108和第二中间端子构件110。第一中间端子构件108和第二中间端子构件110可以呈杏仁状(almond shaped),其中,两个翼从相对的端部延伸。或者,中间端子构件可限定包括柔和的过渡轮廓的其它形状(诸如,泪滴状、细长菱形或其它适合的形状)。密封件112可位于壳体104和第一中间端子构件108之间,并位于壳体104和第二中间端子构件110之间。此外,壳体104的上部和壳体104的下部可被密封到彼此。壳体104可限定尺寸适于保持电池单元活性材料(诸如,阳极、阴极、分隔件和电解质)的腔114。用于袋型电池单元的壳体104可以由围绕电池单元活性材料真空密封的铝层压板或保形聚合物制成。例如,两个分开堆叠的层叠片可以在所有四个边上密封,或者对半折叠的单个层叠片可以沿着三个边或所有四个边密封。这种构造与直接围绕端子的传统密封工艺相比提供了使所提出的端子壳体能够实现更紧密的接合和更高质量的密封的保形形状。
第一端子极耳116可嵌入在第一中间端子构件108内,第二端子极耳120可嵌入在第二中间端子构件110内。每个端子极耳可经由(例如)注射成型、3D打印或铸造嵌入在各个中间端子构件内。在各个中间端子构件和壳体104之间的密封件112可减轻因相关材料引起的与将各个端子极耳密封到壳体104相关联的困难。因此,各个中间端子构件的上表面可以与壳体104的上表面齐平或者可以相对于壳体104的上表面偏移。
中间端子构件中的一个可限定通向腔114的进出口。例如,进出口130可由第一中间端子构件108限定。或者可以设想,第二中间端子构件110可限定通向腔114的进出口。
图4示出了电池单元组件100的一部分的分解视图。圆柱形间隔件140、中间构件间隔件141和第一端子极耳116可以彼此布置为促进中间端子结构中的一个(诸如,第一中间端子构件108)的注射成型。例如,圆柱形间隔件和第一端子极耳116可被定位在由中间构件间隔件141限定的腔142内。可用于注射成型第一中间端子构件108的材料的示例包括对电解质具有耐化学性并具有电隔离性的各种塑料和纤维。可将材料供给到加热的料筒中,然后将材料注射到腔142中。一旦材料硬化,可将第一端子极耳116嵌入在材料中,并且可去掉圆柱形间隔件140以提供进出口(诸如,进出口130)。
进出口130可以提供将电解质注入腔114内的导管。例如,可以在电池单元制造或电池单元成型期间将电解质注入到腔114中。如图5中所示,进出口130还可提供接纳排气机构146的位置。可在最终密封操作期间将排气机构146安装在进出口130内。在一个示例中,排气机构146是压敏释放机构。排气机构146可辅助控制气体从腔114内释放。例如,在诸如过充电和短路的特定故障状况下,排气机构146可选择性地释放多余的气体以减轻膨胀并防止电池单元组件100的故障模式。
图6示出了电池单元组件(在此总体上称为电池单元组件200)的另一示例。电池单元组件200可被构造为袋型电池单元组件或棱柱型电池单元组件。多于一个的电池单元组件200可以以阵列的方式对齐,使汇流条与并联或串联的电池单元组件200互连以为车辆部件供电。例如,多个电池单元组件200可以在牵引电池(诸如,上文描述的牵引电池24)内彼此电连通。
电池单元组件200包括壳体202和中间端子结构204。壳体202可限定尺寸适于保持电解质的腔206。中间端子结构204包括第一构件208、第二构件210和中间部分212。中间部分212将第一构件208和第二构件210连接。中间部分212可限定通向腔206的进出口220。虽然在这个示例中中间部分212限定进出口220,但是可以设想第一构件和第二构件中的任一个可限定通向腔206的进出口。
第一构件208和第二构件210可以呈杏仁状,其中,两个翼从相对的端部延伸。或者,第一构件208和第二构件210可限定包括柔和的过渡轮廓的其它形状(诸如泪滴状、细长菱形或其它适合形状)。密封件230可位于壳体202和中间端子结构204之间。
第一端子极耳216可嵌入在第一构件208内,第二端子极耳221可嵌入在第二构件210内。每个端子极耳可经由(例如)注射成型嵌入在各个构件内。位于各个构件和壳体202之间的密封件230可以减轻因相关材料引起的与将各个端子极耳密封到壳体202相关联的困难。因此,各个构件的上表面可以与壳体202的上表面齐平或者可以相对于壳体202的上表面偏移。第一端子极耳216和第二端子极耳221可以与中间端子结构204布置为使得每个端子极耳从进出口220等距地间隔开。
进出口220可提供用于将电解质注入腔206内的导管。例如,可在电池单元制造或电池单元成型期间将电解质注入到腔206中。进出口220还可提供用于接纳排气机构246的位置。可以在最终的密封操作期间将排气机构246安装在进出口220内。在一个示例中,排气机构246是压敏释放机构。排气机构246可辅助控制气体从腔206内释放。例如,在诸如过充电和短路的特定故障状况下,排气机构246可选择性地释放多余的气体以减轻膨胀并防止电池单元组件200的故障模式。
如上文所描述的,与之前的设计相比,将端子极耳嵌入在中间结构内可有助于改善袋型电池单元的中间结构和壳体之间的接触。在电池单元成型期间对由壳体限定的腔增设进出口为电解质注入提供导管,并且还为用于在袋型电池单元使用期间辅助释放气体的排气机构提供位置。
虽然上文描述了各个实施例,但是并不意味着这些实施例描述了权利要求涵盖的所有可能的形式。说明书中所使用的词语为描述性词语而非限制性词语,并且应理解的是,可在不脱离本公开的精神和范围的情况下做出各种改变。如之前所描述的,可组合各个实施例的特征以形成本公开的可能未被明确描述或示出的进一步的实施例。虽然各个实施例可能已被描述为提供优点或在一个或更多个期望的特性方面优于其他实施例或现有技术实施方式,但是本领域的普通技术人员应该认识到,根据具体应用和实施方式,一个或更多个特征或特性可被折衷,以实现期望的整体系统属性。因此,被描述为在一个或更多个特性方面不如其他实施例或现有技术实施方式合意的实施例并不在本公开的范围之外,并且可以期望用于特定应用。
Claims (20)
1.一种用于牵引电池的袋型电池单元组件,包括:
壳体,限定有腔;
第一中间端子构件,至少部分地设置在所述壳体内,并限定有通向所述腔和所述壳体的外部的进出口;
第一端子极耳,嵌入在第一中间端子构件内。
2.如权利要求1所述的袋型电池单元组件,还包括:压敏释放机构,设置在所述进出口内以选择性地从所述腔排出气体。
3.如权利要求1所述的袋型电池单元组件,还包括第二中间端子构件和第二端子极耳,第二中间端子构件至少部分地设置在所述壳体内,第二端子极耳嵌入在第二中间端子构件内。
4.如权利要求3所述的袋型电池单元组件,其中,第一中间端子构件和第二中间端子构件是单个部件。
5.如权利要求1所述的袋型电池单元组件,其中,所述进出口的尺寸适于使气体从所述腔排出。
6.如权利要求1所述的袋型电池单元组件,其中,所述进出口的尺寸适于接收电解质的注入以将电解质输送到所述腔内。
7.如权利要求1所述的袋型电池单元组件,还包括位于第一中间端子构件和所述壳体之间的密封件。
8.一种袋型电池单元组件,包括:
壳体,限定有腔;
中间端子结构,至少部分地设置在所述壳体内,所述中间端子结构包括第一构件和第二构件,并包括连接所述第一构件和所述第二构件的中间部分,所述中间部分限定通向所述腔和所述壳体的外部的进出口;
一对端子极耳,每个端子极耳嵌入在所述第一构件和所述第二构件中的一个内,并从所述腔延伸到所述壳体外部的位置。
9.如权利要求8所述的袋型电池单元组件,其中,所述端子极耳和所述中间端子结构彼此布置为使得每个端子极耳与所述进出口等距地间隔开。
10.如权利要求8所述的袋型电池单元组件,其中,所述中间端子结构是注射成型的。
11.如权利要求8所述的袋型电池单元组件,还包括:排气机构,设置在所述进出口内以选择性地从所述腔排出气体。
12.如权利要求8所述的袋型电池单元组件,其中,所述进出口的尺寸适于接收电解质的注入以将电解质输送到所述腔内。
13.如权利要求8所述的袋型电池单元组件,其中,所述第一构件和所述第二构件中的每个呈杏仁状、泪滴状或细长的菱形形状。
14.如权利要求8所述的袋型电池单元组件,其中,所述壳体由真空密封的铝层压板或保形聚合物制成。
15.一种车辆,包括:
牵引电池,选择性地对车辆的部件供电,并包括袋型电池单元组件的阵列,每个袋型电池单元组件包括:
壳体,限定有腔;
中间端子结构,至少部分地设置在所述壳体内并限定有进出口;
一对端子极耳,每个端子极耳嵌入在所述中间端子结构内,
其中,所述中间端子结构和所述壳体彼此布置为使得所述进出口通向所述腔和所述壳体外部的位置。
16.如权利要求15所述的车辆,其中,所述中间端子结构包括第一构件和第二构件,所述第一构件被注射成型以接纳所述一对端子极耳中的一个,所述第二构件被注射成型以接纳所述一对端子极耳中的另一个。
17.如权利要求15所述的车辆,还包括:密封件,设置在所述中间端子结构和所述壳体之间。
18.如权利要求15所述的车辆,其中,所述中间端子结构和所述壳体还彼此布置为使得所述一对端子极耳中的每个端子极耳从所述腔延伸到所述壳体外部的位置。
19.如权利要求15所述的车辆,还包括:排气机构,设置在所述进出口内以选择性地从所述腔释放气体。
20.如权利要求15所述的车辆,其中,所述壳体由真空密封的铝层压板/保形聚合物制成。
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