CN101669238B - 用于电池的负极板栅 - Google Patents
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Abstract
本发明的示范性实施例涉及生产电池负极板栅的方法,其包括提供电池板栅材料带以及在电池板栅材料上执行冲孔操作以除去材料形成板栅。冲孔操作产生具有由框架限定的多个板栅线材的负极电池板栅。电池板栅包括顶部框架构件。第一侧部框架构件在其第一端处与顶部框架构件结合。第二侧部框架构件在其第二端处与顶部框架构件结合。底部框架构件与顶部框架构件间隔并结合到第一侧部框架构件和第二侧框架构件。负极板栅不包括当负极板栅设置在隔离器中时可能刺穿聚合物隔离器的暴露的线材端。
Description
相关专利申请的交叉参考
本申请要求2007年3月2日提交的美国临时申请NO.60/904,404的优先权和利益,其全文内容结合在此引做参考。
技术领域
本申请大体上涉及电池领域(例如用于例如汽车的车辆的铅酸启动、照明和点火电池)。更具体地,本申请涉及用于这种电池的负极板栅和制造这种负极板栅的方法。
背景技术
铅酸电池一般包括若干电池单元元件,所述电池单元元件设置在包含硫酸电解质的容器的隔离舱室中。每个电池单元元件包括至少一个正极板或者板栅、至少一个负极板或者板栅、和设置在每个正极板和负极板之间的多孔隔离器(例如,聚合物隔离器)。所述正极板和负极板每个包括支承电化学活性材料(称为电池糊料)的铅或者铅合金板栅。活性材料是涂敷到板栅上的铅基材料(即,在电池不同充电/放电阶段的PbO、PbO2、Pb或者PbSO4)。板栅在正极和阴极活性材料之间提供可以使电流导电的电接触。
按照惯例,用不同的工艺制造正极和负极板栅。例如,可以使用若干不同的方法制造正极板栅。一种方法涉及使用传统的重力铸造叠箱铸型(gravity cast book mold)操作。另一个更新近的方法,涉及在连续工艺中生产板栅,其中之前铸造的连续的金属(例如,铅合金)带被引入到模具中在冲孔操作(例如,使用顺序冲模)中从其中除去材料以形成板栅的结构。可以使用特别改装的模具使板栅的个别线材变形或者“被精压”以改进电池糊料的粘附性。这样的工艺在下列美国专利中更详细地描述,其全部内容结合在此引做参考:美国专利No.5,582,936;美国专利NO.5,989,749;美国专利No.6,203,948;美国专利No.6,274,274;和美国专利NO.6,953,641。
相反,负极板栅一般使用扩张金属工艺(expanded metal process)形成。由铸造(即,铸造带)或者由铸造和滚压(即,可锻带)制造铅合金带,所述带随后被切开并且扩张以在互连电池板栅的带中产生预期的板栅图案。
期望提供一种用于生产在铅酸电池中使用的负极板栅的改良方法。也期望提供具有改进其可制造性和性能的特征部的负极板栅。期望提供包括任何一个或多个这些或其它有利特征部的板栅和/或生产板栅的方法,这对于评述本公开的人将变得显而易见。
发明内容
本发明的示范性实施例涉及生产电池负极板栅的方法,其包括提供电池板栅材料带以及在电池板栅材料上执行冲孔操作以除去材料形成板栅。冲孔操作产生具有由框架限定的多个板栅线材的负极电池板栅。电池板栅包括顶部框架构件。第一侧部框架构件在其第一端处与顶部框架构件结合。第二侧部框架构件在其第二端处与顶部框架构件结合。底部框架构件与顶部框架构件间隔并结合到第一侧部框架构件和第二侧框架构件。负极板栅不包括当负极板栅设置在聚合物隔离器中时可能刺穿聚合物隔离器的暴露的线材端。
附图说明
图1是根据示范性实施例的电池的切开透视图。
图2是由扩张金属工艺生产的用于铅酸电池的现有技术负极电池板栅的平面图。
图3是根据示范性实施例的负极电池板栅的平面图。
图4-8是根据多个示范性实施例的板栅线材的剖面图。
图9是根据另一个示范性实施例的负极电池板栅的平面图。
图10-11是图9所示的部分板栅的细节图。
图12是根据另一个示范性实施例的负极板栅的平面图。
图13是根据另一个示范性实施例的负极板栅的平面图。
具体实施方式
图1是电池10的切开透视图,所述电池10包括外壳者容器12和结合到外壳12的盖子或罩14。端子或者接线柱16,18从盖14的顶部表面伸出。根据示范性实施例,端子16是正极端子,端子18是负极端子。根据其它示范性实施例,端子可以设置在其它位置(例如,位于容器的前表面,如在侧端子电池中)。
外壳12的内部由壁或者隔离件22分成隔离的空间20。在每个空间20内设置电池单元元件30,电池单元元件30由交替的正极板32(例如,电极、板栅)和负极板34(例如,电极、板栅)组成。正极板和负极板被多孔聚合物隔板或隔离器36隔开(例如,将负极板设置在隔离器的封套中将它们与相邻的正极板分开,如美国专利6,001,503所述)。从正极板32伸出的凸片33结合到连接片40,并且从负极板34伸出的凸片35结合到连接片42。然后正极连接片结合到正极端子16,负极连接片结合到负极端子18。
图2示出现有技术的负极板栅或者板100的平面图。板栅100包括顶部框架构件或元件110,元件110具有形式为从元件110伸出的集流凸片的构件120。板栅100还包括底部框架构件或元件112。在顶部框架构件110和底部框架构件112之间为多个互连线材,互连线材被设置为菱形图案。节点132设置在线材交叉处。
按照惯例,例如图2所示的负极板栅用扩张金属工艺(expandedmetal process)制成,其中金属片材在各种点上被刀片切开并在片材相反端拉开以将金属片材的切开部分扩张为多个板栅线材。如图2中所示,在扩张工艺中拉开顶部和底部框架元件以形成互连线材。扩张完成之后,金属片材被切开形成板栅,所述板栅沿其横向侧留下暴露的线材端(例如,图2所示线材端134)。这样装置的一个难题是沿负极板栅侧部的板栅线材端可能刺穿隔离器封套从而使线材端与邻近的正极板接触,这会导致电池内部短路并且潜在地明显缩短电池的使用寿命。
根据示范性实施例,不采用扩张金属工艺形成板栅,代之以顺序冲孔(progressive punching)操作形成板栅,其中金属片材(例如,铅合金)被顺序冲模贯穿,除去材料形成如图3所示的板栅形状。根据示范性实施例,传统的铅或者铅合金电池板栅材料(例如一铅-钙-锡合金)被熔化并且连续铸造以形成连续板栅材料带。然后连续带可以被滚压或者锻造以修改带的厚度或者晶粒结构。然后通过从连续带中冲孔去除板栅材料形成系列互连电池板栅。
在冲孔操作期间,维持所述带为连续的带并且以顺序冲孔操作形成互连的板栅形状(即,通过几个冲孔操作使特征部被增加到电池板栅中)。每块互连的电池板栅具有由如图3所示和如上描述的框架限定的板栅网格。
在冲孔操作或者形成具有互连板栅的带的工艺之后,可以在冲压或者精压操作或者工艺中可选择地处理带的电池板栅线材区段。如图4-7中所示,冲压操作或者工艺用来变形或者精压板栅线材从而使板栅线材在节点之间具有的修改的剖面。例如,冲压操作或者工艺可以包括使冲孔好的板栅的板栅线材的矩形剖面变成如图4中所示的八边形剖面的模具。可替换地,可以使用压模使板栅线材元件的中间部分关于板栅线材在线材和节点相交的相对端部的剖面旋转大约20度到大约70度,如图5所示相交。如图6-7所示,还可进行其它修改。
应该理解可以选择任何数量的修改的板栅线材形状,以便为负极板栅提供优于冲压工艺生产的矩形剖面的负极板栅的改善的糊料的粘附特性。根据各种示范性实施例,修改的板栅线材大体上具有菱形、平行四边形、六边形、八边形或者椭圆形的形状。当在冲压操作台中使板栅线材变形时,可以改变在每个板栅线材区段的相对端之间沿板栅线材长度的变形区域。例如,根据示范性实施例,在板栅线材的相对端之间大约90%长度的板栅线材在冲压操作台处经受变形(例如,靠近板栅线材区段一端大约5%长度的板栅线材具有矩形剖面,板栅线材中心90%长度的板栅线材具有大体上八边形剖面,并且在板栅线材区段另一端附近的大约5%长度的板栅线材具有矩形剖面)。根据其它示范性实施例,可以修改线材的不同百分比。
根据其它示范性实施例,板栅线材可以不被冲压或者精压,并且将具有如图8所示的剖面形状(例如,未修改的矩形剖面)。
尽管优选为节点保持不变形,但在某些情况下可以有利地在冲压操作台中变形或者精压节点。由于节点和板栅线材的精压倾向于使板栅带为非平面的,因此倾向于将糊料比另一端更厚地涂到板的一端的涂敷操作可得益于这个效应。然后可以定向板栅带以使糊料可以更容易地流到薄涂敷的表面,即所述板栅进入涂敷机器使得凹侧面对被薄涂敷的方向,一般是底部。
也应注意全部或者部分板栅可以被包覆金属合金(例如,铅合金)以提供各种优点,包括例如改善的电池糊料粘附性。这种包覆层的例子在美国专利No.6,953,641中描述,其全部公开内容结合在此列为参考。
然后互连的板栅被处理为涂上电池糊料并切开带以形成多个电池板。可替换地,互连的板栅可以在涂敷之前被切割成多个板栅并且存储起来以备后用。使用例如在此描述的板栅替代扩张金属板栅的一个有利特征是当扩张金属板栅不能被固定孔口涂敷器涂敷时(由于卷曲线材不平的干扰),而冲压的板栅不受这种限制。
根据示范性实施例,负极板栅200具有在大约0.010英寸和0.050英寸之间的未涂敷厚度。用扩张金属工艺生产的传统负极板栅具有在大约0.022英寸和0.035英寸之间的带厚度,并且具有在大约0.030英寸和0.045英寸之间的扩张网眼厚度。提供使用更薄负极板栅的电池的优点是,由于每个负极板栅占据更少空间,因此使用这种板栅的电池可以显示出更高的能量密度(例如,附加的板栅可以增加到电池中或者电池可以被制造得更小)。
参照图3,根据示范性实施例示出改进的负极板栅200。板栅200包括顶部框架构件或元件210(具有从其伸出的集流凸片220)、底部框架构件或元件212、第一侧部框架构件或元件214和第二侧部框架构件或元件216。侧部框架构件214,216结合到顶部框架构件210和底部框架构件212的相对侧形成大致长方形的闭合区域。多个板栅线材230被设置为菱形图案在节点232处相交。
仍然参考图3,板栅线材230在多个交叉点处(例如,板栅线材230与顶部框架构件210相交处)结合到顶部框架构件210。这些交叉点可以具有提高在板栅线材230和顶部框架构件210之间界面电导率的特征部250。提高电导率的特征部允许相对薄的板栅线材230以相当有效的方式结合到顶部框架构件210(即,使用尽可能少的材料),并且还在板栅线材230和顶部框架构件210之间提供坚固的连接。如图3所示,随着板栅线材230接近顶部框架构件210,板栅线材逐渐变宽。除随板栅线材接近顶部框架构件210板栅线材230的逐渐变宽之外,交叉点还在其任一侧上变弯。曲线或者圆角(radii)仅能通过使用冲孔操作,而不能在扩张金属工艺中获得。侧部和底部框架构件212,214,216也可以在板栅线材230结合到侧部和底部框架构件212,214,216的交叉点处具有相似的特征部。
仍然参考图3,侧部、顶部和/或底部框架构件210,212,214,216可以包括一个或多个特征部260(例如,切口、凹口、凹槽等)以在电池中板栅的使用期间帮助控制和/或补偿板栅生长(参见例如图3示出的形成在侧部框架构件214,216中的切口)。特征部260提供局部弱化区域,使得如果板栅200在使用期间需要生长,特征部260将破坏和限制和/或控制板栅生长。根据其它示范性实施例,如在美国专利申请No.11/984,666(其全部公开内容在此列为参考)中示出和描述的约束或者控制板栅生长的特征部可以结合到在此描述的板栅中。
如图3所示的示范性实施例的一个有利特征是因为框架元件210,212,214和216围绕板栅200的整个外缘形成边界或框架,因此没有可以刺穿电池隔离器并且引起电池内部短路的暴露线材端。这本身又可以帮助延长电池的寿命(例如,防止短路等)。
应当注意尽管图3根据示范性实施例示出了负极板栅200,但是其它构造也是可以的。图9-13示出了根据其它示范性实施例的其它可能构造(图9-13中的附图标记与图3中的附图标记相似)。如上所述的各种特征部(例如,帮助电导率的特征部;帮助控制和/或补偿板栅生长的切口或者凹口;冲压使线材剖面变形,给全部或者部分板栅包覆上例如铅合金的合金等)也可以选择性地用于如图9-13所示的实施例。
例如,在图9-11中示出的板栅300,其中板栅线材的菱形图案比图3所示的图案更细长(例如,菱形图案在交叉的线材之间不形成大体上方形的开口)。这类细长的菱形图案不能使用扩张金属工艺获得。顶部、侧部和/或底部框架元件或者构件可以包括帮助在板栅线材和框架构件(参见,例如,图9,示出了形成在板栅线材330和顶部框架构件310之间的特征部350)之间的界面电导率的特征部(例如,在板栅线材与框架构件的交叉点附近逐渐加宽板栅线材等)。特征部350可以在板栅线材和框架构件之间的每个交叉点处产生(参见,例如图9,示出的特征部350),或者仅在某些交叉点产生(例如,仅在凸片320左边的交叉点的左侧上,和仅在凸片320右边的交叉点的右侧上)。另外,侧部、顶部和/或底部框架元件或者构件还可以包括帮助控制和/或补偿在板栅使用期间板栅生长的特征部(例如,切口、生长限制装置等)(参见,例如,图9示出形成在侧部框架元件314,316中的特征部360)。
图12示出板栅400的示范性实施例,其中线材被设置为在线材之间形成大体上六边形的开口(例如,获得“蜂窝”构造)。顶部、侧部和/或底部框架元件或者构件可以包括帮助板栅线材和框架构件之间的界面电导率的特征部(在板栅线材与框架构件的交叉点附近逐渐加宽板栅线材等)(参见,例如,图12,示出形成在板栅线材430和顶部框架构件410之间的特征部450)。特征部450可以在板栅线材和框架构件之间的每个交叉点处产生,或者仅在某些交叉点产生。另外,侧部、顶部和/或底部框架元件或者构件还可以包括帮助控制和/或补偿在板栅使用期间板栅的生长的特征部(例如,切口、生长限制装置等)(参见,例如,图12,示出形成在侧部框架元件414,416中的特征部460)。如图12所示的设计的一个有利特征是每个节点432具有三个汇集到节点的线材,相反,例如,图9所示的设计,其中每个节点332中具有四个汇集到节点的线材。这种构造的一个好处是在节点处使用更少的材料。
图13示出板栅500的示范性实施例,其中线材设置为在线材之间形成大体上矩形的开口。竖直线材在顶部或者上部框架元件510和底部或者下部框架元件512之间连续延伸,水平线材在相邻的竖直线材之间延伸,使它们不能从左到右连续延伸过在侧部框架元件514和516之间的板栅。根据如图13所示的示范性实施例,每个完整的矩形开口是基本上相同的尺寸(部分矩形的开口具有不同尺寸,这取决于它们位于板栅中的位置)。根据其它示范性实施例,完整的矩形开口可以有不同尺寸。顶部、侧部和/或底部框架元件或者构件可以包括帮助板栅线材和框架构件之间的界面电导率的特征部(例如,在板栅线材与框架构件的交叉点附近逐渐加宽的板栅线材等)(参见,例如,图13,示出形成在板栅线材530和顶部框架构件510之间的特征部550)。特征部550可以在板栅线材530和框架构件之间的每个交叉点处产生,或者仅在某些交叉点产生。侧部、顶部和/或底部框架元件还可以包括帮助控制和/或补偿在板栅使用期间板栅生长的特征部(未示出)。
根据示范性实施例,电池可以使用在冲压和/或精压工艺中形成的正极和负极板或板栅制造。
根据示范性实施例,根据在此描述的任何示范性实施例的负极板栅由包括如表格1所示的成分的铅合金制成。
表1
元素 | 百分比范围 |
钙 | 0.05到0.50% |
锑 | 0.01到2.5% |
锡 | 0.01到2.0% |
铜 | 0.001到0.1% |
砷 | 0.001到0.25% |
铋 | 0.01到0.05% |
银 | 0.003到0.01% |
铅 | 余量 |
根据另一个示范性实施例,根据在此描述的任何示范性实施例的负极板栅由包括如表格2所示的成分的铅合金制成。
表2
元素 | 百分比范围 |
钙 | 0.05到0.15% |
锑 | <0.002% |
锡 | >0.5% |
铜 | <0.005% |
砷 | <0.002% |
铋 | <0.02% |
银 | <0.005% |
铅 | 余量 |
用如上所述的这种方式形成负极板栅的一个有利特征是这种板栅比用扩张金属工艺生产的板栅需要更少的材料。因此,使用如上所述的这种板栅可以实现重量和材料成本的节约。
值得注意的是各种示范性实施例所示的电池板栅的结构和装置仅是说明性的。虽然在本公开中仅详细描述了本发明的几个实施例,评述本公开的本领域技术人员将容易理解在实质上不背离在此公开的主体的新颖性教导和优势的情况下可以做出多种修改(例如,各种尺寸、大小、结构、形状和各种元素的比例、参数值、安装装置、使用的材料、颜色、方位等的变化)。相应地,所有这些修改意在包括在附带的权利要求所限定的本发明的范围中。根据可替换的实施例,任何工艺或者方法步骤的次序或者顺序可以被改变或者重新排序。可以在不背离本发明范围的情况下对各种示范性实施例的设计、操作条件和装置做其它代替、修改、变化和省略。
Claims (19)
1.用于生产用于电池的负极板栅的方法,包括:
提供电池板栅材料带;
在所述电池板栅材料上执行冲孔操作以除去材料并形成负极电池板栅,负极电池板栅具有通过所述冲孔操作而形成的多个板栅线材,所述多个板栅线材形成以框架为边界的板栅线材均匀图案,所述框架包括:
顶部框架构件;
在所述顶部框架构件的第一端处结合到所述顶部框架构件的第一侧部框架构件;
在所述顶部框架构件的第二端处结合到所述顶部框架构件的第二侧部框架构件;
底部框架构件,其与所述顶部框架构件间隔开并结合到所述第一侧部框架构件和所述第二侧部框架构件;
其中,所述多个板栅线材在多个交叉点处连接到所述顶部框架构件、第一侧部框架构件、第二侧部框架构件或底部框架构件的其中一个,所述多个交叉点具有构造成帮助在所述多个板栅线材和框架之间导电的导电增强特征;
其中,通过逐渐加宽所述多个板栅线材中的在所述多个交叉点的每个交叉点附近的板栅线材来形成导电增强特征,
其中所述交叉点在所述顶部框架构件和所述多个板栅线材之间设置有圆角以提高在所述顶部框架构件和所述多个板栅线材之间的导电,以及
其中所述负极板栅不包括暴露的线材端以在所述负极板栅设置在聚合物隔离器中时防止刺穿聚合物隔离器。
2.根据权利要求1所述的方法,其中所述冲孔操作为顺序冲孔操作。
3.根据权利要求1所述的方法,其中所述电池板栅材料为连续铸造铅合金带,其被处理以改变所述连续铸造铅合金带的厚度和晶粒结构的至少其中之一。
4.根据权利要求3所述的方法,其中所述电池板栅具有在0.010英寸到0.050英寸范围中的厚度。
5.根据权利要求3所述的方法,其中通过从所述连续铸造铅合金带中冲孔去除所述板栅材料形成系列互连电池板栅。
6.根据权利要求1所述的方法,其中多个线材被设置为选自由菱形、蜂窝形和矩形构成的组的图案。
7.根据权利要求6所述的方法,其中所述多个线材形成菱形图案,其中所述线材以直角彼此交叉。
8.根据权利要求6所述的方法,其中所述多个线材形成细长的菱形图案,其中所述线材不以直角彼此交叉。
9.根据权利要求1所述的方法,其中顶部框架构件、第一侧部框架构件、第二侧部框架构件和底部框架构件中的至少其中之一包括意在补偿在所述板栅使用期间的板栅生长的特征部。
10.根据权利要求1所述的方法,其中所述多个板栅线材经受精压操作。
11.根据权利要求10所述的方法,其中所述精压操作产生具有选自八边形、平行四边形、六边形或椭圆形组成的组的形状的板栅线材剖面。
12.根据权利要求11所述的方法,其中所述形状是菱形。
13.根据权利要求10、11或12所述的方法,其中所述板栅线材在所述板栅线材的相对端处的节点之间沿所述板栅线材的90%长度变形。
14.根据权利要求13所述的方法,其中所述电池板栅的所述节点经受精压操作。
15.根据权利要求1所述的方法,其中所述负极电池板栅被包覆上铅合金。
16.根据权利要求1所述的方法,其中所述电池板栅材料是铅-钙-锡合金。
17.根据权利要求16所述的方法,其中所述电池板栅材料具有0.05%到0.50%的钙、0.001%到2.5%的锑、0.01%到2.0%的锡、0.001%到0.1%的铜、0.001%到0.25%的砷、0.01%到0.05%的铋、0.003%到0.01%的银和余量为铅的成分。
18.根据权利要求16所述的方法,其中电池板栅材料具有如下成分:0.05%到0.15%的钙、小于0.002%的锑、大于0.5%的锡、小于0.005%的铜、小于0.002%的砷、小于0.02%的铋、小于0.005%的银和余量的铅。
19.一种用于生产用于电池的负极板的方法,包括根据权利要求1所述的用于生产负极板栅的方法,以及给所述负极板栅包覆上活性材料。
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UA99126C2 (ru) | 2012-07-25 |
CN101669238A (zh) | 2010-03-10 |
AU2008223058A1 (en) | 2008-09-12 |
BRPI0808481A2 (pt) | 2014-07-01 |
RU2477549C2 (ru) | 2013-03-10 |
MX2009009385A (es) | 2009-10-12 |
CA2679909C (en) | 2015-05-05 |
KR20090125253A (ko) | 2009-12-04 |
WO2008109429A3 (en) | 2009-07-23 |
CA2679909A1 (en) | 2008-09-12 |
EP2122725B1 (en) | 2014-04-09 |
JP2010520607A (ja) | 2010-06-10 |
AU2008223058B2 (en) | 2014-05-29 |
RU2009136499A (ru) | 2011-04-10 |
US20100101078A1 (en) | 2010-04-29 |
EP2122725A2 (en) | 2009-11-25 |
US9577266B2 (en) | 2017-02-21 |
CO6231068A2 (es) | 2010-12-20 |
HK1139237A1 (en) | 2010-09-10 |
BRPI0808481B1 (pt) | 2018-12-26 |
WO2008109429A2 (en) | 2008-09-12 |
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