CN114614170A - 一种纽扣电池及其加工方法 - Google Patents
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Abstract
本发明公开了一种纽扣电池,属于电池技术领域;包括外壳本体、壳盖本体和电池卷芯,外壳本体设有电芯腔,电芯腔顶部的内侧壁上设有搭接台;壳盖本体包括电极本体和壳盖;壳盖的中间设有安装孔,安装孔的顶部设有环形槽;电极本体包括电极连接板和电极接头;电极接头穿出安装孔,电极连接板和电极接头均通过绝缘设置在壳盖上;壳盖本体固定安装在搭接台上;壳盖本体的外径与外壳本体的内径相等;电池卷芯置于电芯腔内,外壳本体的底部设有灌注孔,灌注孔通过密封钉密封。本发明能够减小纽扣电池的整体体积,有效提高纽扣电池的整体体积能量密度,电极与壳体之间的连接方式能够避免电池短路,有效保证纽扣电池的安全性,还便于灌注电解液和封装。
Description
技术领域
本发明涉及电池技术领域,具体地说是涉及一种纽扣电池及其加工方法。
背景技术
纽扣电池(Button Cell)通常也称扣式电池,是指外形类似纽扣的一类电池。纽扣电池的直径通常相对更大,而厚度相对更薄。纽扣电池包括钢壳、上盖和电芯组件,上盖盖设在钢壳上形成电芯腔,电芯组件设在电芯腔内。
纽扣电池包括钢壳、上盖和电芯组件,上盖盖设在钢壳上形成电芯腔,电芯组件设在电芯腔内。常规的组装常采用激光焊、点焊或超声焊等方式将各个组件按照一定的顺序和部位进行焊接,常见的一种纽扣电池,其上盖的半径大于钢壳的半径,虽然能够很好地进行焊接,但是焊接后的电池整体体积较大,影响其整体的能量密度,电子设备需要预留较大的空间来安装,对于较小的电子设备来说,是非常不便的。
另外,纽扣电池组装后需要向内部注入电解液,常规的方式通过电池上表面开孔而向下注液,然后进行封装,若封装的机构以及措施不到位,会影响纽扣电池的密封性,因而需要提供一种体积小,能量密度高,安全性好,便于灌注电解液以及封装,并且封装的密封性好的纽扣电池,已解决现有技术存在的技术问题。
发明内容
本发明要解决的技术问题是提供一种体积小,能量密度高,安全性好,便于灌注电解液以及封装,并且封装的密封性好的纽扣电池。
为了解决上述技术问题,本发明的技术方案为:一种纽扣电池,包括外壳本体、壳盖本体和电池卷芯,所述外壳本体设有电芯腔,所述电芯腔顶部的内侧壁上设有搭接台;所述壳盖本体包括电极本体和壳盖;所述壳盖的中间设有安装孔,所述安装孔的顶部设有环形槽,所述环形槽内设有绝缘材料;所述电极本体包括电极连接板和电极接头;所述电极接头穿出所述安装孔,所述电极连接板和电极接头均通过绝缘设置在所述壳盖上;所述壳盖本体固定安装在所述搭接台上;所述壳盖本体的外径与所述外壳本体的内径相等;所述电池卷芯置于所述电芯腔内,所述电池卷芯上设置有第一极耳和第二极耳,所述第一极耳与电极连接板连接;所述第二极耳与所述外壳本体连接;所述外壳本体的底部设有灌注孔,灌注孔通过密封钉密封。
优选地,所述壳盖本体通过激光焊接在所述搭接台上。
优选地,所述第一极耳通过激光焊接在电极连接板上;所述第二极耳通过激光焊接在所述外壳本体上。
优选地,所述电极连接板与所述壳盖之间设有绝缘材料;所述电极接头与所述安装孔之间设有绝缘材料。
优选地,所述密封钉包括一体成型的密封底板和密封端头。
优选地,所述密封钉为铝质材料制成。
优选地,所述灌注孔的周围设有底环形槽,底环形槽的厚度与所述密封底板的厚度相同。
优选地,所述密封底板通过激光焊接在所述底环形槽内。
本发明还公开了一种纽扣电池的加工方法,该方法包括如下步骤:
(1)选择适合外壳本体相匹配的电池卷芯,将电池卷芯的第一极耳通过激光焊接在壳盖本体的电极连接板上;将电池卷芯的第二极耳通过激光焊接在外壳本体内;
(2)将壳盖本体的壳盖通过激光焊接在电芯腔顶部内侧壁的搭接台上,使壳盖本体与外壳本体密封连接;
(3)向灌注孔内注入电解液,注液结束后,将密封钉通过激光焊接在灌注孔外部,使外壳本体底部密封。
与现有技术相比,本发明的有益效果是:
1、本发明通过在外壳本体的电芯腔顶部的内侧壁上设有搭接台;电芯腔用于放置电池卷芯;通过激光焊接,将壳盖本体固定安装在搭接台上,既能够将壳盖本体与外壳本体密封,纽扣电池整体密封性能好;将壳盖本体的外径与外壳本体的内径相等,组装后,形成一个整体的圆柱形,大大减小了纽扣电池的外部体积,有效提高纽扣电池的整体体积能量密度;减少电子设备安装空间;大大提高了纽扣电池的使用范围;
2、电极本体与壳盖之间的连接方式能够避免电池短路,有效保证纽扣电池的安全性;为减小电池体积提供了保障;
3、通过在外壳本体的底部设有灌注孔,便于纽扣电池组装完成后,向其内部注入电解液,灌注孔通过特制的密封钉密封,有效保证了灌注孔的密封,避免电解液外泄,提高了电池的安全性。
附图说明
图1为本发明纽扣电池的结构示意图;
图2为图1的结构爆炸图;
图3为图1的A-A方向剖面图。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明。在此需要说明的是,对于这些实施方式的说明用于帮助理解本发明,但并不构成对本发明的限定。此外,下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。
如图1至3所示,本发明一种纽扣电池,包括外壳本体1、壳盖本体2和电池卷芯3,外壳本体1设有电芯腔11,电芯腔11内用于盛装电解液和电池卷芯3,电芯腔11顶部的内侧壁上设有搭接台12,搭接台12上便于放置壳盖本体2。壳盖本体2包括电极本体21和壳盖22;壳盖22的中间设有安装孔221,安装孔221的顶部设有环形槽222,环形槽222内设有绝缘材料;以确保壳盖本体2与电极本体21不电连接,避免电池短路;电极本体21包括电极连接板211和电极接头212;电极接头212穿出安装孔221,电极连接板211和电极接头212均通过绝缘设置在壳盖22上,具体在电极连接板211与壳盖22之间设有绝缘材料;电极接头212与安装孔221之间设有绝缘材料,这样能够有效保证电极本体21与壳盖本体2不会电连接,有效避免电池短路,大大提高了纽扣电池的安全性;安装孔221用于安装电极本体21,由于在安装孔221与电极接头212之间要填充绝缘材料,因而需要预留一定的风险,因而其内径略大于电极接头212的外径;壳盖本体2固定安装在搭接台12上,具体地,壳盖本体2通过激光焊接在搭接台12上;壳盖本体2的外径与外壳本体1的内径相等;当壳盖本体2焊接在搭接台12上时候,使得整个外壳本体1与壳盖本体2形成一个圆柱体型,不会存在多余的边角,有效减小了纽扣电池的体积,有效提高了纽扣电池的能量密度;电池卷芯3置于电芯腔11内,电池卷芯3上设置有第一极耳31和第二极耳32,电池卷芯3为现有设计,它的结构是第一极片31和所述第二极片32之间绝缘设置并卷绕形成卷芯结构;第一极耳31与电极连接板211连接;第二极耳32与外壳本体1连接;本发明中,第一极耳31通过激光焊接在电极连接板211上;第二极耳32通过激光焊接在外壳本体1上;外壳本体1的底部设有灌注孔4,灌注孔4通过密封钉5密封。
如图2和3所示,本发明的密封钉5包括一体成型的密封底板51和密封端头52,密封钉5为铝质材料制成,便于焊接;为了更好地将灌注孔4密封,确保电解液不外漏,灌注孔4的周围设有底环形槽41,底环形槽41的厚度与密封底板51的厚度相同。密封的时候,将密封底板51通过激光焊接在底环形槽41内,密封端头52自然将灌注孔4堵住,由于密封钉5的密封底板51与底环形槽41通过激光焊焊接在一起,有效保证了密封性,使得外壳本体1的密封性良好,有效提高了纽扣电池的安全性。
综上述,本发明通过在外壳本体1的电芯腔11顶部的内侧壁上设有搭接台12;电芯腔11用于放置电池卷芯3;通过激光焊接,将壳盖本体2固定安装在搭接台12上,既能够将壳盖本体2与外壳本体1密封,纽扣电池整体密封性能好;将壳盖本体2的外径与外壳本体1的内径相等,组装后,形成一个整体的圆柱形,大大减小了纽扣电池的外部体积,有效提高纽扣电池的整体体积能量密度;减少电子设备安装空间;大大提高了纽扣电池的使用范围;电极本体21与壳盖22之间的连接方式能够避免电池短路,有效保证纽扣电池的安全性;为减小电池体积提供了保障;通过在外壳本体1的底部设有灌注孔4,便于纽扣电池组装完成后,向其内部注入电解液,灌注孔4通过特制的密封钉5密封,有效保证了灌注孔4的密封,避免电解液外泄,提高了电池的安全性。
本发明的纽扣电池的加工方法,包括如下步骤:
(1)选择适合外壳本体相匹配的电池卷芯,将电池卷芯的第一极耳通过激光焊接在壳盖本体的电极连接板上;将电池卷芯的第二极耳通过激光焊接在外壳本体内;
(2)将壳盖本体的壳盖通过激光焊接在电芯腔顶部内侧壁的搭接台上,使壳盖本体与外壳本体密封连接;
(3)向灌注孔内注入电解液,注液结束后,将密封钉通过激光焊接在灌注孔外部,使外壳本体底部密封。
以上结合附图对本发明的实施方式作了详细说明,但本发明不限于所描述的实施方式。对于本领域的技术人员而言,在不脱离本发明原理和精神的情况下,对这些实施方式进行多种变化、修改、替换和变型,仍落入本发明的保护范围内。最后需要说明的是,说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术,本领域技术人员无需付出创造性劳动即可实现,故在此不再赘述。
Claims (9)
1.一种纽扣电池,包括外壳本体(1)、壳盖本体(2)和电池卷芯(3),其特征在于,所述外壳本体(1)设有电芯腔(11),所述电芯腔(11)顶部的内侧壁上设有搭接台(12);所述壳盖本体(2)包括电极本体(21)和壳盖(22);所述壳盖(22)的中间设有安装孔(221),所述安装孔(221)的顶部设有环形槽(222),所述环形槽(222)内设有绝缘材料;所述电极本体(21)包括电极连接板(211)和电极接头(212);所述电极接头(212)穿出所述安装孔(221),所述电极连接板(211)和电极接头(212)均通过绝缘设置在所述壳盖(22)上;所述壳盖本体(2)固定安装在所述搭接台(12)上;所述壳盖本体(2)的外径与所述外壳本体(1)的内径相等;所述电池卷芯(3)置于所述电芯腔(11)内,所述电池卷芯(3)上设置有第一极耳(31)和第二极耳(32),所述第一极耳(31)与电极连接板(211)连接;所述第二极耳(32)与所述外壳本体(1)连接;所述外壳本体(1)的底部设有灌注孔(4),灌注孔(4)通过密封钉(5)密封。
2.根据权利要求1所述纽扣电池,其特征在于,所述壳盖本体(2)通过激光焊接在所述搭接台(12)上。
3.根据权利要求1所述纽扣电池,其特征在于,所述第一极耳(31)通过激光焊接在电极连接板(211)上;所述第二极耳(32)通过激光焊接在所述外壳本体(1)上。
4.根据权利要求1所述纽扣电池,其特征在于,所述电极连接板(211)与所述壳盖(22)之间设有绝缘材料;所述电极接头(212)与所述安装孔(221)之间设有绝缘材料。
5.根据权利要求1所述纽扣电池,其特征在于,所述密封钉(5)包括一体成型的密封底板(51)和密封端头(52)。
6.根据权利要求5所述纽扣电池,其特征在于,所述密封钉(5)为铝质材料制成。
7.根据权利要求5或6所述纽扣电池,其特征在于,所述灌注孔(4)的周围设有底环形槽(41),底环形槽(41)的厚度与所述密封底板(51)的厚度相同。
8.根据权利要求7所述纽扣电池,其特征在于,所述密封底板(51)通过激光焊接在所述底环形槽(41)内。
9.一种纽扣电池的加工方法,其特征在于,该方法包括如下步骤:
(1)选择适合外壳本体相匹配的电池卷芯,将电池卷芯的第一极耳通过激光焊接在壳盖本体的电极连接板上;将电池卷芯的第二极耳通过激光焊接在外壳本体内;
(2)将壳盖本体的壳盖通过激光焊接在电芯腔顶部内侧壁的搭接台上,使壳盖本体与外壳本体密封连接;
(3)向灌注孔内注入电解液,注液结束后,将密封钉通过激光焊接在灌注孔外部,使外壳本体底部密封。
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