CN110112011A - 一种电化学储能器件 - Google Patents

一种电化学储能器件 Download PDF

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CN110112011A
CN110112011A CN201910502336.0A CN201910502336A CN110112011A CN 110112011 A CN110112011 A CN 110112011A CN 201910502336 A CN201910502336 A CN 201910502336A CN 110112011 A CN110112011 A CN 110112011A
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罗俊强
董光勇
陈德忠
向杰
赵方辉
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Chengdu Concave Amperex Technology Ltd
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Chengdu Concave Amperex Technology Ltd
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Priority to CN201910502336.0A priority Critical patent/CN110112011A/zh
Publication of CN110112011A publication Critical patent/CN110112011A/zh
Priority to AU2020291058A priority patent/AU2020291058A1/en
Priority to US17/618,529 priority patent/US20220351918A1/en
Priority to PCT/CN2020/094924 priority patent/WO2020248939A1/zh
Priority to KR1020227000851A priority patent/KR20220032553A/ko
Priority to JP2021574181A priority patent/JP2022537282A/ja
Priority to EP20822217.4A priority patent/EP3985699A4/en
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Abstract

本发明公开了一种电化学储能器件，属于电化学储能器件技术领域。包括：盖板,包括引出柱和固定板,所述引出柱为导电体,所述固定板为绝缘体,所述引出柱上下贯穿固定在所述固定板上；外壳,呈筒形且至少一端设置开口,所述固定板与所述外壳的开口通过密封圈密封连接；卷芯,设置于所述外壳的内腔,所述卷芯通过上连接片与所述引出柱侧面焊接实现导电连接,通过下连接片与所述外壳的另一引出端导电连接；所述上连接片的外缘设有用于套住卷芯的上卷边，引出柱的外缘与上连接片的上卷边通过侧面激光焊接固定。本发明的内阻小，强度高，稳定性好，在使用过程中能增加抗震性。

Description

一种电化学储能器件
技术领域
本发明涉及电化学储能器件技术领域，更具体的说是涉及一种电化学储能器件。
背景技术
超级电容器又称为电化学电容器,是通过极化电解质来储能的一种电化学元件,具有很高的功率密度,充电时问短,使用寿命长,作为辅助能源在电动汽车及智能电网的存储系统中得到了起来越多的重视。电容器的正极与负极位于外壳同一端的结构称为一端引出电容；大中型电容器通常采用两端引出形态,两端引出结构的超级电容内阻相较于一端引出结构的内阻低很多,可以实现更大的电流放电,从而提升超级电容的功率性能。
目前两端引出电容的电极通常采用铝质的盖板,外部的外壳也为铝质结构,盖板与外壳之间需要保持密封连接,在两者之间需要设置绝缘垫,但盖板与外壳仍然可能出现相互导通的风险,造成整个电容器失效。
发明内容
本发明的目的在于提供一种电化学储能器件，盖板具有良好的绝缘效果，且上连接片和下连接片分别和外壳、盖板采用激光焊接，具有内阻小的优点。
为了实现上述目的，本发明采用以下技术方案：
一种电化学储能器件，包括：盖板,包括引出柱和固定板,所述引出柱为导电体,所述固定板为绝缘体,所述引出柱上下贯穿固定在所述固定板上；外壳,呈筒形且至少一端设置开口,所述固定板与所述外壳的开口通过密封圈密封连接；卷芯,设置于所述外壳的内腔,所述卷芯通过上连接片与所述引出柱侧面焊接实现导电连接,通过下连接片与所述外壳的另一引出端导电连接；所述上连接片的外缘设有用于套住卷芯的上卷边，引出柱的外缘与上连接片的上卷边通过侧面激光焊接固定。
进一步的，所述下连接片的外缘设有用于套住卷芯的下卷边；外壳的下端内壁向内凸出形成凸起，用于与下连接片的下卷边紧配合定位，在外壳的侧壁上与凸起相对的位置处开设有凹槽，下卷边与凸起在凹槽处通过激光穿透焊接固定，导电连接。
进一步的，所述盖板呈圆环形的台阶状,所述引出柱设置于所述固定板的中心。
进一步的，所述固定板呈由上到下逐渐变大的台阶状，在固定的台阶上开设有密封槽，密封槽内设有密封圈，绝缘的固定板与外壳的开口通过密封圈密封连接；引出柱的上端为第一圆柱,第一圆柱的直径小于固定板的台阶直径，第一圆柱的顶面高出固定板的外表面；引出柱的下端为第二圆柱，第二圆柱的直径小于固定板外径，高出固定板的内表面。
进一步的，所述引出柱为铝柱,所述固定板为树脂板，所述上连接片和下连接片均为铝片。
进一步的，所述上连接片中心设置上卷边的上定位孔，所述下连接片的中心设置有用于穿入卷芯的中心卷针孔起定位和固定卷芯的下卷边的下定位孔。
进一步的，所述引出柱上贯通设置有用于向所述卷芯注入电解液的注液孔；所述注液孔通过密封件保持内外隔绝密封，引出柱内表面中心设有与注液孔相连通且用于与上连接片的上定位孔定位的定位柱。
进一步的，所述注液孔在靠近第一圆柱的一端开设有与注液孔同轴的安装孔，所述安装孔的直径大于注液孔的直径，注液孔内依次设有橡胶塞和铝塞,且铝塞固定在安装孔内，所述铝塞与所述引出柱的第一圆柱之间通过激光焊接。
进一步的，所述上连接片上开设有若干用于卷芯吸收电解液的上通孔，所述下连接片上开设有若干用于卷芯吸收电解液的下通孔。
进一步的，所述上连接片的外面包裹耐高温绝缘热缩套管，外壳开口处设有用于固定盖板的扩口。
本发明与现有技术相比具有的有益效果是：
1、本发明提供了一种电化学储能器件,包括盖板、外壳、卷芯等结构,其中盖板包括引出柱和固定板,引出柱为导电体,固定板为绝缘体,引出柱上下贯穿固定在固定板上；外壳呈筒形且至少一端设置开口，绝缘的固定板与外売的开口密封连接；卷芯设置于外壳的内腔；卷芯通过上连接片与引出柱导电连接，下连接片与外壳的另一引出端导电连接；卷芯分别与上连接片和下连接片激光焊接，引出柱的外缘与上连接片的上卷边通过侧面激光焊接固定、下连接片的下卷边与外壳的凸起在凹槽处通过激光穿透焊接固定，此种结构能保证产品的低内阻特性；上连接片与下连接片分别引出电容器的正负极,将正负极引向外部。盖板由引出柱和固定板构成,两者固定为一体结构,引出柱与外壳之间通过固定板绝缘,不需要使用其他的绝缘材料,可起到更好的绝缘效果。
2、本发明的注液孔在靠近第一圆柱的一端开设有与注液孔同轴的安装孔，所述安装孔的直径大于注液孔的直径，注液孔内依次设有橡胶塞和铝塞,且铝塞固定在安装孔内，所述铝塞与所述引出柱的第一圆柱之间通过激光焊接。此种结构的设计，在焊接铝塞时，激光的焊接路线会避开橡胶塞，避免损伤橡胶塞，并且焊接也更牢固。
3、本发明的外壳下端内侧向内凸出形成凸起，用于和下连接片紧配合，凸起外对应的外壳表面有凹槽，利于外壳和下连接片焊接，下连接片通过此种结构的焊接在外壳的内壁上，而不是端部的底面上，内阻小，强度高，稳定性好，在使用过程中能增加下连接片与外壳的牢固性，抗震性好。
附图说明
图1是本发明的一种电化学储能器件的爆炸结构图；
图2是本发明的一种电化学储能器件安装配后的结构示意图；
图3是图2中A的局部放大示意图；
图4是图2中B的局部放大示意图；
图5是本发明的一种电化学储能器件的盖板的结构示意图；
图6是本发明的一种电化学储能器件的上连接片的示意图；
图7是本发明的一种电化学储能器件的上连接片的结构示意图；
图8是本发明的一种电化学储能器件的下连接片的结构示意图；
图9是本发明的一种电化学储能器件的下连接片的结构示意图；
图10是本发明的一种电化学储能器件的外壳的结构示意图。
图11是本发明的一种电化学储能器件的卷芯的结构示意图。
图中标记：1-外壳，2-下连接片，3-卷芯，4-上连接片，5-绝缘热缩套管，6-盖板，7-橡胶塞，8-铝塞，9-密封圈，11-凹槽，12-凸起，13-扩口，21-下定位孔，22-下卷边，23-下通孔，31-卷针孔，41-上定位孔，42-上卷边，43-上通孔，61-引出柱，62-固定板，611-注液孔，612-定位柱，613-安装孔。
具体实施方式
下面结合实施例对本发明作进一步的描述，所描述的实施例仅仅是本发明一部分实施例，并不是全部的实施例。基于本发明中的实施例，本领域的普通技术人员在没有做出创造性劳动前提下所获得的其他所用实施例，都属于本发明的保护范围。
实施例1:
如图1-3所示，一种电化学储能器件，包括：盖板6,包括引出柱61和固定板62,所述引出柱61为导电体,所述固定板62为绝缘体,所述引出柱61上下贯穿固定在所述固定板62上；引出柱61末端有螺柱或者光柱，便于单体之间连接；外壳1,呈筒形且至少一端设置开口,所述固定板62与所述外壳1的开口通过密封圈密封连接；卷芯3,设置于所述外壳1的内腔,所述卷芯3通过上连接片4与所述引出柱61侧面焊接实现导电连接,通过下连接片2与所述外壳1的另一引出端导电连接；如图6和7所示，所述上连接片4的外缘设有用于套住卷芯3的上卷边42，所述上连接片4中心设置上卷边42的上定位孔41，上定位孔41卷边放入卷芯3孔，引出柱61的外缘与上连接片4的上卷边42通过侧面激光焊接固定。
本实施例中，所述盖板6呈圆环形的台阶状,所述引出柱61设置于所述固定板62的中心。在本实施例中，所述引出柱61为铝柱,所述固定板62为树脂板，所述上连接片4和下连接片2均为铝片。外壳1也为铝制材料制成。
如图5所示，本实施例中，所述固定板62呈由上到下逐渐变大的台阶状，在固定的台阶上开设有密封槽，密封槽内设有密封圈9，引出柱61的上端为第一圆柱,第一圆柱的直径小于固定板62的台阶直径，第一圆柱的顶面高出固定板62的外表面；引出柱61的下端为第二圆柱，第二圆柱的直径小于固定板62外径，高出固定板62的内表面。所述上连接片4的外面包裹耐高温绝缘热缩套管5，绝缘热缩套管5连上接连片与引出柱61的焊接处一起包住，避免上连接片4与外壳1接触，外壳1开口处设有用于固定盖板6的扩口13。扩口13也便于绝缘热缩套管5放入。
在本实施例中，引出柱61的外缘与上连接片4的上卷边42通过侧面激光焊接固定，此种结构的焊接在引出柱61的外缘，而不是采用常规的紧配合，强度高，稳定性好，并且内阻小，抗震性好。
实施例2：
本实施是在实施例1的基础上进一步优化，本实施例重点阐述与实施例1相比的改进之处，相同之处不再赘述，在本实施例中，如图8和9所示，所述下连接片2的中心设置下定位孔21，下定位孔21的卷边放入卷芯的卷针孔31，下连接片2的外缘设有用于套住卷芯3的下卷边22。如图4和10所示，外壳1的下端内壁向内凸出形成凸起12，用于与下连接片2的下卷边22紧配合定位，在外壳1的侧壁上与凸起12相对的位置处开设有凹槽11，下卷边22与凸起12在凹槽11处通过激光穿透焊接固定，导电连接。
本实施例的外壳1下端内侧向内凸出形成凸起12，用于和下连接片2紧配合，凸起12外对应的外壳1表面有凹槽11，利于外壳1和下连接片2焊接，下连接片2通过此种结构的焊接在外壳1的内壁上，而不是端部的底面上，内阻小，强度高，稳定性好，在使用过程中能增加下连接片2与外壳1的牢固性，抗震性好。更为优选的是，凸起12为环形凸起12，焊接面更大，内阻值更小，焊接强度更高，抗震性更好。凹槽11的设置，降低了焊接处的外壳1的厚度，降低了生产制造工艺的难度，便于生产。
本实施例中，上连接片4的上卷边42、下连接片2的下卷边22分别包住卷芯3，上连接片4的耐高温绝缘热缩套管5与外壳1内壁紧配合，下连接片2的下卷边22和外壳1向内收缩的环形凸起12紧配合，使产品能更好的抗震动。
实施例3：
如图3所示，本实施是在实施例2的基础上进一步优化，本实施例重点阐述与实施例2相比的改进之处，相同之处不再赘述，在本实施例中，所述引出柱61上贯通设置有用于向所述卷芯3注入电解液的注液孔611；当电解液加注完成后，所述注液孔611通过密封件保持内外隔绝密封，引出柱61内表面中心设有与注液孔611相连通且用于与上连接片4的上定位孔41定位的定位柱612。定位柱612的设计便于定位。
实施例4：
如图3所示，本实施是在实施例3的基础上进一步优化，本实施例重点阐述与实施例3相比的改进之处，相同之处不再赘述，在本实施例中，所述注液孔611在靠近第一圆柱的一端开设有与注液孔611同轴的安装孔613，所述安装孔613的直径大于注液孔611的直径，注液孔611内依次设有橡胶塞7和铝塞8,且铝塞8固定在安装孔613内，所述铝塞8与所述引出柱61的第一圆柱之间通过激光焊接。
优选的，所述上连接片4上开设有若干用于卷芯3吸收电解液的上通孔43，所述下连接片2上开设有若干用于卷芯3吸收电解液的下通孔23，便于电解液渗透。
在外壳1的侧壁上设置有防爆阀，通过防爆阀避免外壳1内部的压力过高。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

1.一种电化学储能器件，包括：盖板(6),包括引出柱(61)和固定板(62),所述引出柱(61)为导电体,所述固定板(62)为绝缘体,所述引出柱(61)上下贯穿固定在所述固定板(62)上；外壳(1),呈筒形且至少一端设置开口,所述固定板(62)与所述外壳(1)的开口通过密封圈(9)密封连接；卷芯(3),设置于所述外壳(1)的内腔,所述卷芯(3)通过上连接片(4)与所述引出柱(61)侧面焊接实现导电连接,通过下连接片(2)与所述外壳(1)的另一引出端导电连接；其特征在于：所述上连接片(4)的外缘设有用于套住卷芯(3)的上卷边(42)，引出柱(61)的外缘与上连接片(4)的上卷边(42)通过侧面激光焊接固定。
2.根据权利要求1所述的一种电化学储能器件，其特征在于：所述下连接片(2)的外缘设有用于套住卷芯(3)的下卷边(22)；外壳(1)的下端内壁向内凸出形成凸起(12)，用于与下连接片(2)的下卷边(22)紧配合定位，在外壳(1)的侧壁上与凸起(12)相对的位置处开设有凹槽(11)，下卷边(22)与凸起(12)在凹槽(11)处通过激光穿透焊接固定，导电连接。
3.根据权利要求1或2所述的一种电化学储能器件，其特征在于：所述盖板(6)呈圆环形的台阶状,所述引出柱(61)设置于所述固定板(62)的中心。
4.根据权利要求3所述的一种电化学储能器件，其特征在于：所述固定板(62)呈由上到下逐渐变大的台阶状，在固定的台阶上开设有密封槽，密封槽内设有密封圈(9)，引出柱(61)的上端为第一圆柱,第一圆柱的直径小于固定板(62)的台阶直径，第一圆柱的顶面高出固定板(62)的外表面；引出柱(61)的下端为第二圆柱，第二圆柱的直径小于固定板(62)外径，高出固定板(62)的内表面。
5.根据权利要求3所述的一种电化学储能器件，其特征在于：所述引出柱(61)为铝柱,所述固定板(62)为树脂板，所述上连接片(4)和下连接片(2)均为铝片。
6.根据权利要求3所述的一种电化学储能器件，其特征在于：所述上连接片(4)中心设置上卷边(42)的上定位孔(41)，所述下连接片(2)的中心设置有用于穿入卷芯(3)的中心卷针孔(31)起定位和固定卷芯(3)的下卷边(22)的下定位孔(21)。
7.根据权利要求3所述的一种电化学储能器件，其特征在于：所述引出柱(61)上贯通设置有用于向所述卷芯(3)注入电解液的注液孔(611)；所述注液孔(611)通过密封件保持内外隔绝密封，引出柱(61)内表面中心设有与注液孔(611)相连通且用于与上连接片(4)的上定位孔(41)定位的定位柱(612)。
8.根据权利要求7所述的一种电化学储能器件，其特征在于：所述注液孔(611)在靠近第一圆柱的一端开设有与注液孔(611)同轴的安装孔(613)，所述安装孔(613)的直径大于注液孔(611)的直径，注液孔(611)内依次设有橡胶塞(7)和铝塞(8),且铝塞(8)固定在安装孔(613)内，所述铝塞(8)与所述引出柱(61)的第一圆柱之间通过激光焊接。
9.根据权利要求3所述的一种电化学储能器件，其特征在于：所述上连接片(4)上开设有若干用于卷芯(3)吸收电解液的上通孔(43)，所述下连接片(2)上开设有若干用于卷芯(3)吸收电解液的下通孔(23)。
10.根据权利要求3所述的一种电化学储能器件，其特征在于：所述上连接片(4)的外面包裹耐高温绝缘热缩套管(5)，外壳(1)开口处设有用于固定盖板(6)的扩口(13)。
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