WO2014187130A1 - 一种应用于锂离子电池的正极耳卷带 - Google Patents

一种应用于锂离子电池的正极耳卷带 Download PDF

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Publication number
WO2014187130A1
WO2014187130A1 PCT/CN2013/090265 CN2013090265W WO2014187130A1 WO 2014187130 A1 WO2014187130 A1 WO 2014187130A1 CN 2013090265 W CN2013090265 W CN 2013090265W WO 2014187130 A1 WO2014187130 A1 WO 2014187130A1
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aluminum metal
tab
ion battery
metal strip
lithium ion
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PCT/CN2013/090265
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English (en)
French (fr)
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凌万秾
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江门市拓联电子科技有限公司
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Publication of WO2014187130A1 publication Critical patent/WO2014187130A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a lithium ion battery, and more particularly to a positive ear coil for a lithium ion battery.
  • the positive electrode of the lithium ion battery The ear is generally made of metal aluminum. Because the affinity of aluminum to metal tin is very poor, it is not easy to directly solder on the positive electrode of aluminum. Therefore, the lithium ion battery needs to be welded with a nickel on the exposed end of the positive electrode.
  • Belt or aluminum-nickel composite tape (ie, nickel) makes it easy to solder between the protection circuit board or the wire, but the nickel transfer operation is troublesome, the process is complicated, and the nickel transfer efficiency is low, which greatly affects the positive ear nickel speed and the lithium ion battery.
  • an object of the present invention is to provide a positive electrode ear coil which is simple in structure, can improve the production efficiency and the yield of a lithium ion battery, and can accelerate the nickel output rate of the positive electrode.
  • a positive ear coil for a lithium ion battery comprising a main body of a reel with aluminum as a material, wherein one or both sides of the main body of the reel are welded with a non-aluminum metal strip which is easy to be tinned, adjacent A non-aluminum metal strip is disposed between the tab rubber covering the sides of the web of the web, and one side of the tab rubber covers the solder joint between the web of the web and the strip of non-aluminum metal.
  • one side of the tab rubber covers a soldering position where the strip main body and the non-aluminum metal strip overlap, and one end of the non-aluminum metal strip is located on the side of the tab soft rubber.
  • a hot melt material for fixing the other end of the non-aluminum metal strip to the main body of the tape is disposed between the adjacent tab rubbers, and the hot melt material is not An aluminum metal strip and a web of the tape overlapping the non-aluminum metal strip at the end are wrapped therein.
  • the invention has the beneficial effects that: according to the invention, a non-aluminum metal strip which is easy to be tinned is welded on the positive electrode ear of the lithium ion battery, and a soft rubber is provided between the adjacent non-aluminum metal strips. It can be applied to the fully automatic winding machine to realize the fully automatic production of the positive electrode ear with aluminum metal strip on the pole piece of the battery, which avoids the nickel-ion battery manufacturer to turn the nickel by itself, greatly improving the lithium ion battery manufacturer.
  • the production efficiency of the finished battery also reduces the breakage of the positive electrode tab body during the nickel-transfer process of the lithium-ion battery manufacturer, and also avoids the long-term soldering process and high temperature on the circuit board during the soldering process. The occurrence of burns caused by the battery cells helps to improve the yield of finished products of lithium ion battery manufacturers.
  • Figure 1 is a schematic view showing the appearance of the present invention
  • FIG. 2 is a schematic view showing the structure of one end of the non-aluminum metal strip of the present invention in the soft rubber of the ear;
  • Fig. 3 is a schematic view showing the appearance of a hot melt material provided in the present invention.
  • a positive ear coil for a lithium ion battery comprising a tape main body 1 made of aluminum, and a non-aluminum metal strip 2 which is easy to be tinned is welded on one side or both sides of the tape main body 1
  • the non-aluminum metal strip 2 may be separately welded on the side of the web main body 1, or the non-aluminum metal strip 2 may be welded on both sides of the web main body 1, and the strip may be wound by two non-aluminum metal strips 2 The main body 1 is clamped between the two.
  • one side of the tape main body 1 is welded with a non-aluminum metal strip 2, and the non-aluminum metal strip 2 which is easy to be tinned may be a nickel metal strip.
  • the spacing between the two can be determined according to the size of the battery using the positive electrode; one side of the soft rubber 3 covers the welding position 4 between the tape main body 1 and the non-aluminum metal strip 2, the above non-aluminum
  • the web main body 1 of the metal strip 2 end can be connected by integral molding, that is, the web main body 1 is connected intermittently; non-aluminum metal
  • the tape body 1 at both ends may also be connected by a non-aluminum metal strip 2, that is, the tape body 1 itself is broken, where the non-
  • one side of the tab soft rubber 3 covers one end of the non-aluminum metal strip 2 when the soldering position 4 overlaps between the web main body 1 and the non-aluminum metal strip 2 Located in the tab rubber 3 on the side, one end of the non-aluminum metal strip 2 is located in the side tab soft rubber 3, which can increase the mechanical strength of the positive ear, and prevent the positive electrode from being broken during welding or moving. . .
  • a hot melt material 5 for fixing the other end of the non-aluminum metal strip 2 to the web main body 1 is disposed between adjacent tab rubbers 3, said heat
  • the molten material 5 encloses the end non-aluminum metal strip 2 and the web main body 1 overlapping the end non-aluminum metal strip 2, and the hot-melt material 5 overlaps one end of the non-aluminum metal strip 2 and the end
  • the tape main body 1 is wrapped therein, and when the positive ear roll is bent, the break of the non-aluminum metal strip 2 at the end damages the tape main body 1 made of aluminum.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

一种应用于锂离子电池的正极耳卷带，包括以铝作为材质的卷带主体（1），所述的卷带主体的一侧或两侧上间隔焊接有易于上锡的非铝金属条（2），所述相邻的非铝金属条之间设置有一个覆盖于卷带主体两侧的极耳软胶（3），所述极耳软胶的一侧覆盖在卷带主体与非铝金属条之间重叠的焊接位（4）上。通过在锂离子电池的正极耳上间隔焊接有易于上锡的非铝金属条，同时相邻的非铝金属条之间还设置有极耳软胶，使其可应用在全自动卷绕机上，实现带有铝金属条的正极耳焊接在电池的极片上的全自动生产，避免了锂离子电池生产厂家自行转镍，大大的提高了锂离子电池生产厂家成品电池的生产效率。

Description

一种应用于锂离子电池的正极耳卷带
技术领域
本发明涉及锂离子电池，特别是一种应用于锂离子电池的正极耳卷带。
背景技术
目前，国内的锂离子电池一般都采用铝塑膜袋作为包装袋，采用铝塑膜袋包装锂离子电池时，都要使用以极耳软胶为封口及绝缘材料的极耳作为电芯的导电集流体，此种极耳导电部分金属材料的焊接性能直接影响到成品锂离子电池的生产效率和成品良率。
在生产或使用锂离子电池时，都需要将锂离子电池的电芯同保护电路板或电线进行焊接，即将锂离子电池的极耳焊接在保护电路板或电线上，目前，锂离子电池的正极耳一般都采用金属铝制成，因为铝材同金属锡的亲和力很差，不容易在铝制的正极耳上直接进行焊锡，所以锂离子电池在使用时需要在正极耳露出端上焊接一段镍带或铝镍复合带（即转镍）使其与保护电路板或电线间容易焊锡，但是转镍操作麻烦，过程复杂，转镍效率低下，大大的影响了正极耳转镍速率和锂离子电池厂家的生产效率；另外转镍后的正极耳极易胶焊且易折断，从而影响了锂离子电池的正常生产，另外还会缩短了产品的正常使用寿命。
发明内容
为了解决上述问题，本发明的目的在于提供一种结构简单，既可以提高锂离子电池的生产效率及成品良率，还可以加快正极耳转镍速率的正极耳卷带。
本发明为解决其技术问题而采用的技术方案是：
一种应用于锂离子电池的正极耳卷带，包括以铝作为材质的卷带主体,所述的卷带主体的一侧或两侧上间隔焊接有易于上锡的非铝金属条，相邻的非铝金属条之间设置有一个覆盖于卷带主体两侧的极耳软胶，所述极耳软胶的一侧覆盖在卷带主体与非铝金属条之间重叠的焊接位上。
作为上述技术方案的改进，所述极耳软胶的一侧覆盖在卷带主体与非铝金属条之间重叠的焊接位上时，该非铝金属条的一端位于该侧的极耳软胶内。
作为上述技术方案的进一步改进，相邻的极耳软胶之间设置有用于将非铝金属条另一端固定贴合在卷带主体上的热熔材料，所述的热熔材料将该端非铝金属条及与该端非铝金属条重叠的卷带主体包裹在其内。
本发明的有益效果是：由于本发明通过在锂离子电池的正极耳上间隔焊接有易于上锡的非铝金属条，同时相邻的非铝金属条之间还设置有极耳软胶，使其可应用在全自动卷绕机上，实现带有铝金属条的正极耳焊接在电池的极片上的全自动生产，避免了锂离子电池生产厂家自行转镍，大大的提高了锂离子电池生产厂家成品电池的生产效率，同时也降低了锂离子电池生产厂家在自行转镍过程中正极耳片体的断裂，同时也避免了在上锡焊接过程中因为焊接时间长、温度高而对线路板或电芯造成烫伤的现象的发生，有助于提高锂离子电池生产厂家的成品良率。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是本发明的外观结构示意图；
图2是本发明的非铝金属条一端位于极耳软胶内的结构示意图；
图3是本发明上设置有热熔材料的外观结构示意图。
具体实施方式
参照图1至图3， 一种应用于锂离子电池的正极耳卷带，包括以铝作为材质的卷带主体1,所述的卷带主体1的一侧或两侧上间隔焊接有易于上锡的非铝金属条2，这里，可以在卷带主体1一侧单独焊接上非铝金属条2，也可以在卷带主体1的两侧分别焊接上非铝金属条2，通过两条非铝金属条2将卷带主体1夹紧在两者之间，作为本发明的优选实施例，所述卷带主体1的一侧焊接有非铝金属条2，上述易于上锡的非铝金属条2可以为镍金属条、铜条或铝镍复合金属条等等，相邻的非铝金属条2之间设置有一个覆盖于卷带主体1两侧的极耳软胶3，每相邻的两非铝金属条2之间的间隔距离可根据使用正极耳的电池大小而定；所述极耳软胶3的一侧覆盖在卷带主体1与非铝金属条2之间重叠的焊接位4上，上述非铝金属条2端的卷带主体1可通过一体成型连接，即卷带主体1是连接间断的；非铝金属条2两端的卷带主体1也可以是通过非铝金属条2连接起来的，即卷带本体1本身是断开的，这里，焊接在卷带主体1上的非铝金属条2将其两端的卷带主体1连接起来构成锂离子电池正极耳卷带。
进一步，作为本发明的优选实施例，所述极耳软胶3的一侧覆盖在卷带主体1与非铝金属条2之间重叠的焊接位4上时，该非铝金属条2的一端位于该侧的极耳软胶3内，上述非铝金属条2的一端位于该侧极耳软胶3内，可以增加正极耳的机械强度，避免电池在焊接或移动过程中，正极耳被折断。。
作为本发明再进一步的优选实施例，相邻的极耳软胶3之间设置有用于将非铝金属条2另一端固定贴合在卷带主体1上的热熔材料5，所述的热熔材料5将该端非铝金属条2及与该端非铝金属条2重叠的卷带主体1包裹在其内，上述的热熔材料5将非铝金属条2的一端和与该端重叠的卷带主体1包裹在其内，可以避免正极耳卷带弯卷时，该端的非铝金属条2的断口损伤以铝作为材质的卷带主体1。
以上所述仅为本发明的优先实施方式，只要以基本相同手段实现本发明目的的技术方案都属于本发明的保护范围之内。

Claims (3)

  1. 一种应用于锂离子电池的正极耳卷带，包括以铝作为材质的卷带主体（1）,其特征在于：所述的卷带主体（1）的一侧或两侧上间隔焊接有易于上锡的非铝金属条（2），相邻的非铝金属条（2）之间设置有一个覆盖于卷带主体（1）两侧的极耳软胶（3），所述极耳软胶（3）的一侧覆盖在卷带主体（1）与非铝金属条（2）之间重叠的焊接位（4）上。
  2. 根据权利要求1所述的一种应用于锂离子电池的正极耳卷带，其特征在于：所述极耳软胶（3）的一侧覆盖在卷带主体（1）与非铝金属条（2）之间重叠的焊接位（4）上时，该非铝金属条（2）的一端位于该侧的极耳软胶（3）内。
  3. 根据权利要求1或2所述的一种应用于锂离子电池的正极耳卷带，其特征在于：相邻的极耳软胶（3）之间设置有用于将非铝金属条（2）另一端固定贴合在卷带主体（1）上的热熔材料（5），所述的热熔材料（5）将该端非铝金属条（2）及与该端非铝金属条（2）重叠的卷带主体（1）包裹在其内。
PCT/CN2013/090265 2013-05-24 2013-12-24 一种应用于锂离子电池的正极耳卷带 WO2014187130A1 (zh)

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CN105140458A (zh) * 2015-07-30 2015-12-09 深圳市文壹科技有限公司 一种无接头铝转非铝金属极耳的制作工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1983677A (zh) * 2005-12-13 2007-06-20 中国电子科技集团公司第十八研究所 一种软包装电池极耳结构
CN202616336U (zh) * 2012-04-20 2012-12-19 江门市拓联电子科技有限公司 一种锂离子电池正极耳卷带

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1983677A (zh) * 2005-12-13 2007-06-20 中国电子科技集团公司第十八研究所 一种软包装电池极耳结构
CN202616336U (zh) * 2012-04-20 2012-12-19 江门市拓联电子科技有限公司 一种锂离子电池正极耳卷带

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