CN212750989U - 一种纽扣电池 - Google Patents

一种纽扣电池 Download PDF

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CN212750989U
CN212750989U CN202021994145.5U CN202021994145U CN212750989U CN 212750989 U CN212750989 U CN 212750989U CN 202021994145 U CN202021994145 U CN 202021994145U CN 212750989 U CN212750989 U CN 212750989U
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卢芸东
邝怀概
陈克顺
黄艳平
杨孝彬
唐泰春
李程
黄世东
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Zhuhai Xunda Communication Technology Co ltd
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Abstract

本实用新型公开了一种纽扣电池，包括上盖板、极柱、绝缘套、底壳、电池卷芯和密封球体，上盖板上设有注液孔和上小下大的阶梯通孔；极柱的上下两端分别为圆柱部和头部；绝缘套套设于极柱上，极柱穿设于阶梯通孔内，且头部和阶梯通孔的下端相对应，圆柱部和阶梯通孔的上端相对应；底壳上设有开口，上盖板盖设于开口处并与底壳形成内腔，注液孔和内腔连通；电池卷芯设于内腔内，电池卷芯的两极分别与底壳和极柱电性连接；密封球体设于上盖板上并密封注液孔。由于头部埋进阶梯通孔内，上盖板下方的空间未被极柱侵占，使得纽扣电池绝大部分的内部空间可用于容纳电池卷芯，可以使用体积和容量更大的电池卷芯，从而提高纽扣电池的容量。

Description

一种纽扣电池
技术领域
本实用新型涉及储能设备领域，特别涉及一种纽扣电池。
背景技术
锂离子纽扣电池具有体积小，电压平稳，工作温度范围广，储存寿命长等特点，广泛地应用于电脑主板、计算器、智能手表、遥控器、智能手环、TWS蓝牙耳机以及电子玩具等各种产品内。
纽扣电池一般包括外壳和穿设在外壳上极柱，现阶段的纽扣电池的外壳和极柱体积较大，尤其是极柱伸进外壳内，严重占用了纽扣电池的内部空间，造成纽扣电池内部空间小且无法有效利用内部空间，进而导致电池卷芯体积小以及容量低，不能有效发挥纽扣电池体积小，能量密度高的优势；同时延伸的极柱会导致卷芯金属带与之焊接困难，极柱容易从卷芯金属带上脱落，给纽扣电池带来一定的安全隐患。且纽扣电池内部发生化学反应，纽扣电池容易发生泄漏。
实用新型内容
本实用新型旨在至少解决现有技术中存在的技术问题之一。为此，本实用新型提出一种纽扣电池，结构紧凑，容量大且密封性好。
根据本实用新型的实施例的一种纽扣电池，包括上盖板、极柱、绝缘套、底壳、电池卷芯和密封球体，上盖板上设有注液孔和上小下大的阶梯通孔；极柱的上下两端分别为圆柱部和头部；绝缘套套设于极柱上，极柱穿设于阶梯通孔内，且头部和阶梯通孔的下端相对应，圆柱部和阶梯通孔的上端相对应；底壳上设有开口，上盖板盖设于开口处并与所述底壳形成内腔，所述注液孔和所述内腔连通；电池卷芯设于内腔内，电池卷芯的两极分别与底壳和极柱电性连接；所述密封球体设于所述上盖板上并密封所述注液孔。
根据本实用新型实施例的一种纽扣电池，至少具有如下有益效果：上盖板、极柱和绝缘套组成盖板结构，由于头部埋进阶梯通孔内，盖板结构的整体厚度较小，体积也小，上盖板下方的空间未被极柱侵占，使得纽扣电池绝大部分的内部空间可用于容纳电池卷芯，可以使用体积和容量更大的电池卷芯，从而提高纽扣电池的容量。绝缘套使得上盖板和极柱之间绝缘，整个盖板结构和整个纽扣电池的结构紧凑和结构巧妙。通过注液孔可以往内腔注进电解液，电池卷芯化成产生的气体可通过注液孔排走，然后通过密封球体将注液孔密封，保证纽扣电池的密封性。
根据本实用新型的一些实施例，所述圆柱部的上端外圆表面上设有环状的第一凸缘，所述绝缘套的上表面和所述第一凸缘的下表面抵接。
根据本实用新型的一些实施例，所述圆柱部的外圆表面上设有环状的限位凹槽，所述绝缘套的内壁上设有与所述限位凹槽相匹配的环状凸起。
根据本实用新型的一些实施例，所述电池卷芯包括正极片、负极片和隔膜，所述正极片和所述负极片卷绕在隔膜内，所述正极片和所述负极片分别与所述极柱和所述底壳电性连接。
根据本实用新型的一些实施例，所述上盖板的上端外圆表面上设有环状的第二凸缘，所述上盖板伸进所述开口且所述第二凸缘的下表面和所述开口的侧壁抵接。
根据本实用新型的一些实施例，所述绝缘套为PP制品或PE制品，所述上盖板为不锈钢或铝或铝合金材质，所述极柱为镍材质。
根据本实用新型的一些实施例，所述上盖板的厚度可为0.5～3.0mm，所述注液孔的直径可为0.1～1.5mm，所述圆柱部的直径可为1～4mm，所述头部的直径可为3～8mm，所述阶梯通孔的所述下端的高度可为0.2～0.5mm。
本实用新型的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本实用新型的实践了解到。
附图说明
本实用新型的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本实用新型实施例一种纽扣电池的俯视示意图；
图2为本实用新型实施例一种纽扣电池的侧视示意图；
图3为图1所示的盖板结构的半剖示意图；
图4为图3中A处的局部放大示意图。
附图标记：
上盖板100、注液孔110、阶梯通孔120、第二凸缘130、极柱200、圆柱部210、头部220、第一凸缘211、限位凹槽212、绝缘套300、环状凸起310、底壳400、电池卷芯500、正极片510、负极片520、隔膜530、密封球体600。
具体实施方式
下面详细描述本实用新型的实施例，实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本实用新型，而不能理解为对本实用新型的限制。
在本实用新型的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系可为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。
在本实用新型的描述中，有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
本实用新型的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本实用新型中的具体含义。
参照图1和图2，本发明公开了一种纽扣电池，包括上盖板100、极柱200、绝缘套300、底壳400、电池卷芯500和密封球体600，上盖板100上设有注液孔110和上小下大的阶梯通孔120；极柱200的上下两端分别为圆柱部210和头部220(220)；绝缘套300套设于极柱200上，极柱200穿设于阶梯通孔120内，且头部220和阶梯通孔120的下端相对应，圆柱部210和阶梯通孔120的上端相对应；底壳400上设有开口，上盖板100盖设于开口处并与底壳400形成内腔，注液孔110和内腔连通；电池卷芯500设于内腔内，电池卷芯500的两极分别与底壳400和极柱200电性连接；密封球体600设于上盖板100上并密封注液孔110。
上盖板100、极柱200和绝缘套300组成盖板结构，圆柱部210可携带着绝缘套300插进阶梯通孔120并伸出上盖板100，头部220隔着绝缘套300抵在阶梯通孔120的内壁上，使得极柱200和上盖板100相对固定。由于头部220埋进阶梯通孔120内，盖板结构的整体厚度较小，体积也小，上盖板100下方的空间未被极柱200侵占，使得纽扣电池绝大部分的内部空间可用于容纳电池卷芯500，可以使用体积和容量更大的电池卷芯500，从而提高纽扣电池的容量。绝缘套300使得上盖板100和极柱200之间绝缘，整个盖板结构和整个纽扣电池的结构紧凑和结构巧妙。通过注液孔110可以往内腔注进电解液，电池卷芯500化成产生的气体可通过注液孔110排走，然后通过密封球体600将注液孔110密封，保证纽扣电池的密封性。
可以理解的是，头部220的下表面和上盖板100的下表面平齐，使得极柱200不会往下侵占电池卷芯500所需的空间，保证纽扣电池具有足够大的内部空间用于设置容量较大的电池卷芯500；且极柱200的下表面平整，有利于电池卷芯500和极柱200焊接。圆柱部210的上表面可以和上盖板100的上表面平齐，当然，圆柱部210也可伸至上盖板100外，使得圆柱部210突出于上盖板100上。
参见图3和图4，圆柱部210的上端外圆表面上设有环状的第一凸缘211，绝缘套300的上表面抵接第一凸缘211的下表面。第一凸缘211可限制绝缘套300在圆柱部210上往上移动，从而避免绝缘套300从极柱200上脱落，进而保证极柱200和上盖板100之间的绝缘。应当理解的是，第一凸缘211的直径较阶梯通孔120的最小直径小，这样才能保证极柱200的上端伸至上盖板100的上方；第一凸缘211上没套设有绝缘套300，第一凸缘211伸出上盖板100外，这样才能减小第一凸缘211与上盖板100之间形成短路的风险。
另一些实施例中，圆柱部210的外圆表面上设有环状的限位凹槽212，绝缘套300的内壁上设有与限位凹槽212相匹配的环状凸起310。环状凸起310卡进限位凹槽212内，可避免绝缘套300在极柱200上发生上下滑移的现象，保证极柱200和上盖板100之间的绝缘。
本发明的一些实施例中，电池卷芯500包括正极片510、负极片520和隔膜530，正极片510和负极片520卷绕在隔膜530内，正极片510和负极片520分别与极柱200和底壳400电性连接。正极片510和负极片520相间布置形成内芯，隔膜530卷绕包裹内芯形成电池卷芯500。正极片510由正极活性物质、粘结剂和导电碳黑组成，其中正极活性物质可以为钴酸锂、锰酸锂、镍钴锰酸锂、镍钴铝酸锂、磷酸铁锂中的一种或多种组成；负极片520由负极活性物质、粘结剂和导电碳黑组成，其中负极活性物质可以为石墨、钛酸锂、硅酸负极和合金负极等，将正极片510、负极片520以及隔膜530卷绕成所需要的电池卷芯500。
本发明的一些实施例中，上盖板100的上端外圆表面上设有环状的第二凸缘130，上盖板100伸进开口且第二凸缘130的下表面抵接开口的侧壁。通过第二凸缘130和开口的配合，上盖板100呈现卡接在底壳400的状态，便于上盖板100和底壳400的快速连接。
本发明的一些实施例中，上盖板100上设有注液孔110，注液孔110与底壳400和上盖板100所形成的内腔连通，注液孔110可供电解液穿过，通过预留的注液孔110可方便快捷地往底壳400和上盖板100所形成的内腔内注进电解液。
本发明的一些实施例中，绝缘套300为PP制品或PE制品，PP制品和PE制品属于塑料品，取材方便且价格低廉。PP和PE可通过低温注塑的方式形成绝缘套300。上盖板100为不锈钢或铝或铝合金材质，不锈钢、铝和铝合金的结构强度好且为常用的材料，取材容易且易加工。极柱200为镍材质。密封球体600可为钢球。
本发明的一些实施例中，上盖板100的厚度可为0.5～3.0mm，注液孔110的直径可为0.1～1.5mm，圆柱部210的直径可为1～4mm，头部220的直径可为3～8mm，阶梯通孔120下端的高度可为0.2～0.5mm。
本实施例中，上盖板100的厚度为1.0mm，注液孔110的直径为1.0mm，圆柱部210的直径为3mm，头部220的直径为5mm，密封球体600的直径可比注液孔110的直径大0.2～0.3mm。
上面结合附图对本实用新型实施例作了详细说明，但是本实用新型不限于上述实施例，在所属技术领域普通技术人员所具备的知识范围内，还可以在不脱离本实用新型宗旨的前提下作出各种变化。

Claims (7)

1.一种纽扣电池，其特征在于，包括：
上盖板(100)，所述上盖板(100)上设有注液孔(110)和上小下大的阶梯通孔(120)；
极柱(200)，所述极柱(200)的上下两端分别为圆柱部(210)和头部(220)；绝缘套(300)，所述绝缘套(300)套设于所述极柱(200)上，所述极柱(200)穿设于所述阶梯通孔(120)内，且所述头部(220)和所述阶梯通孔(120)的下端相对应，所述圆柱部(210)和所述阶梯通孔(120)的上端相对应；
底壳(400)，所述底壳(400)上设有开口，所述上盖板(100)盖设于所述开口处并与所述底壳(400)形成内腔，所述注液孔(110)和所述内腔连通；
电池卷芯(500)，所述电池卷芯(500)设于所述内腔内，所述电池卷芯(500)的两极分别与所述底壳(400)和所述极柱(200)电性连接；
密封球体(600)，所述密封球体(600)设于所述上盖板(100)上并密封所述注液孔(110)。
2.根据权利要求1所述的一种纽扣电池，其特征在于：所述圆柱部(210)的上端外圆表面上设有环状的第一凸缘(211)，所述绝缘套(300)的上表面和所述第一凸缘(211)的下表面抵接。
3.根据权利要求1或2所述的一种纽扣电池，其特征在于：所述圆柱部(210)的外圆表面上设有环状的限位凹槽(212)，所述绝缘套(300)的内壁上设有与所述限位凹槽(212)相匹配的环状凸起(310)。
4.根据权利要求1或2所述的一种纽扣电池，其特征在于：所述电池卷芯(500)包括正极片(510)、负极片(520)和隔膜(530)，所述正极片(510)和所述负极片(520)卷绕在隔膜(530)内，所述正极片(510)和所述负极片(520)分别与所述极柱(200)和所述底壳(400)电性连接。
5.根据权利要求1所述的一种纽扣电池，其特征在于：所述上盖板(100)的上端外圆表面上设有环状的第二凸缘(130)，所述上盖板(100)伸进所述开口且所述第二凸缘(130)的下表面和所述开口的侧壁抵接。
6.根据权利要求1所述的一种纽扣电池，其特征在于：所述绝缘套(300)为PP制品或PE制品，所述上盖板(100)为不锈钢或铝或铝合金材质，所述极柱(200)为镍材质。
7.根据权利要求1所述的一种纽扣电池，其特征在于：所述上盖板(100)的厚度可为0.5～3.0mm，所述注液孔(110)的直径可为0.1～1.5mm，所述圆柱部(210)的直径可为1～4mm，所述头部(220)的直径可为3～8mm，所述阶梯通孔(120)的所述下端的高度可为0.2～0.5mm。
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