WO2018049572A1 - 电池封边结构及电池封边方法 - Google Patents

电池封边结构及电池封边方法 Download PDF

Info

Publication number
WO2018049572A1
WO2018049572A1 PCT/CN2016/098925 CN2016098925W WO2018049572A1 WO 2018049572 A1 WO2018049572 A1 WO 2018049572A1 CN 2016098925 W CN2016098925 W CN 2016098925W WO 2018049572 A1 WO2018049572 A1 WO 2018049572A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
edge
shape
patch
insulating
Prior art date
Application number
PCT/CN2016/098925
Other languages
English (en)
French (fr)
Inventor
林森
何平
程文强
郭培培
张亚杰
王丽
Original Assignee
东莞新能源科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东莞新能源科技有限公司 filed Critical 东莞新能源科技有限公司
Priority to PCT/CN2016/098925 priority Critical patent/WO2018049572A1/zh
Publication of WO2018049572A1 publication Critical patent/WO2018049572A1/zh

Links

Images

Classifications

    • 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
    • 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 the field of battery manufacturing, and in particular, to a battery edge sealing structure and a battery edge sealing method.
  • the lithium-ion batteries are packaged for cell outer packaging. After the packaging film is packaged and trimmed, the middle layer of the package edge will expose the metal layer, which may cause short circuit and other problems.
  • the existing battery edge sealing method is mainly divided into an encapsulation and a double hemming process, the encapsulation is performed on the edge of the battery package edge, and then the package edge is folded by a mechanical method; the double hemming method is to enclose the package side.
  • the edge of the package is folded into the inside of the package edge, and the package edge is folded into the core body. Both methods are designed to avoid the exposure of the edge metal layer.
  • the traditional encapsulation or double-folding process is mainly applied to square batteries with regular shapes. It is difficult to fast and effectively seal non-rectangular batteries, especially for non-linear processing of shaped batteries (non-rectangular batteries with outer contours).
  • the object of the present invention is to provide a battery edge sealing structure and a battery edge sealing method, which can be applied to various types of batteries, has good applicability, and improves the quality of battery edge sealing. .
  • the present invention provides a battery edge-sealing structure including a battery core and a packaging film for packaging the battery core; the packaging film forms a package side around the battery core, and the package side has two sides and is located An outer end face between the two sides.
  • the battery edge-sealing structure further includes two layers of insulating patches, and the shape of each of the insulating patches corresponds to the shape of the package side.
  • Each insulation patch has: flat The face is fixed on the corresponding side of the package side; and the bent portion is bent on the outer end surface of the package side. Wherein, the ends of the bent portions of the two insulating patches are fixedly connected.
  • the bent portions of the two insulating patches cover the outer end faces of the package sides, and further Achieve the edge of the battery.
  • the shape of the insulating patch corresponds to the shape of the package side
  • the insulating patch can be applied to various types of cells, and has good applicability even if the outer contour of the package side of the cell is a non-linear edge.
  • the two insulating patches can also completely cover the outer end surface of the package side, and at the same time avoid the problems of wrinkling, overlapping or warping of the insulating patch, improve the appearance of the battery core, and improve the quality of the battery edge sealing.
  • the present invention provides a battery edge sealing method for forming the battery edge sealing structure of the first aspect of the present invention, comprising the steps of: providing a battery core packaged with a packaging film, The packaging film forms a package edge around the battery core, the package side has two sides and an outer end surface between the two sides; 2: provides two planar patches corresponding in shape to the side of the package side of the battery core, each plane sticker The sheet is used to form an insulating patch; 3: two planar patches are respectively placed on the corresponding sides of the package side, and the edge of the planar patch protrudes beyond the edge of the side; 4: Simultaneously applying the two planar patches Performing hot pressing, a portion of each of the planar patches on the corresponding side is adhesively fixed to the side surface and forms a planar portion of the insulating patch, and portions of the two planar patches projecting to the side edges are bent to the outer end surface of the package side.
  • the two planar patches are fixedly connected by the ends of the bent portions formed by hot pressing, so that the bent portions cover the outer end faces of the package sides, thereby realizing the sealing of the battery. side.
  • the battery edge sealing method of the present invention can be applied.
  • the utility model has good applicability.
  • the two insulating patches formed by the battery edge sealing method of the present invention can completely cover the package side.
  • the outer end surface avoids problems such as wrinkling, overlapping or warping of the insulating patch, improves the appearance of the battery core, and improves the quality of the battery edge seal.
  • Figure 1 is a schematic view of a battery edge seal structure in accordance with the present invention.
  • Figure 2 is a cross-sectional view of a battery edge seal structure in accordance with the present invention.
  • FIG. 3 is a schematic view showing a planar patch forming the insulating patch of FIG. 1;
  • FIG. 4 is a top plan view of the packaging film before the sealed core of FIG. 1 is sealed;
  • Figure 5 is a front elevational view of Figure 4.
  • a battery edge-sealing structure includes a battery core 1 and a packaging film 2 encapsulating the battery core 1; the packaging film 2 forms a package side S around the battery core 1, and the package side S has two side faces S1 and An outer end surface S2 between the two side faces S1.
  • the battery edge-sealing structure further includes two layers of insulating patches 3, and the shape of each of the insulating patches 3 corresponds to the shape of the package side S.
  • Each of the insulating patches 3 has a flat portion 31 fixed to the corresponding side surface S1 of the package side S, and a bent portion 32 bent on the outer end surface S2 of the package side S.
  • the end portions 321 of the bent portions 32 of the two insulating patches 3 are fixedly connected.
  • the bent portions 32 of the two insulating patches 3 cover the outer end faces of the package sides S. S2, thereby achieving edge sealing of the battery.
  • the shape of the insulating patch 3 corresponds to the shape of the package side S, the insulating patch 3 can be applied to various types of batteries (especially a shaped battery having a non-rectangular battery outline), and is suitable for use. If the outer contour of the package side S of the battery cell 1 is a non-linear edge (for example, a curved edge), the two insulating patches 3 can completely cover the outer side of the package side S.
  • the end surface S2 avoids problems such as wrinkling, overlapping or warping of the insulating patch 3, improves the appearance of the battery cell 1, and improves the quality of the battery edge seal.
  • the packaging film 2 includes an inner fusion layer 21, an outer protective layer 22, and a metal layer 23 between the inner fusion layer 21 and the outer protective layer 22;
  • the outer end surface S2 exposes the metal layer 23.
  • the inner fusion layer 21 of the two-layer packaging film 2 on the package side S is fused together by heat pressing to achieve a sealed connection of the two-layer packaging film 2. After the hot pressing is completed, it is necessary to cut off the excess portion on the package side S, so that the metal layer 23 is exposed on the outer end surface S2 of the package side S, and the metal layer is exposed to easily cause short circuit of the cell 1 and corrosion of the metal layer 23. Since the bent portion 32 of the two insulating patches 3 covers the outer end surface S2 of the package side S, the sealing of the metal layer 23 can be achieved, and the metal layer 23 is prevented from being exposed (that is, the battery edge sealing process).
  • the "corresponding" in the "the shape of the insulating patch 3 corresponds to the shape of the package side S" means that the shape of each portion of the insulating patch 3 is the same as or similar to the shape of the corresponding portion of the package side S.
  • the shape of the flat portion 31 of each of the insulating patches 3 is the same as or similar to the shape of the side surface S1 of the package side S; referring to FIGS. 1 and 5,
  • the shape of the bent portion 32 of each of the insulating patches 3 is the same as or similar to the shape of the outer end surface S2 of the package side S.
  • the insulating patch 3 is formed by bending a flat patch of equal width.
  • the shape of the flat patch before bending is the same as or similar to the shape of the side S1 of the package side S.
  • a planar patch before the bending of a corresponding shape is prepared by a cutter or laser cutting.
  • the "same shape” means that the shapes are identical or geometrically similar, and the “shape similar” means that the shape is substantially close to “the same shape", except that some dimensions have a slight deviation and do not affect the overall shape.
  • the shape of the side S1 of the package side S is L-shaped or curved (having a certain width), and then the shape before the flat patch is bent is also L-shaped or curved.
  • the insulating patch 3 is made of a thermoplastic polymer material. Therefore, the insulating patch 3 has a certain thermoplasticity, which facilitates the sealing connection of the two insulating patches 3.
  • the flat portion 31 of the insulating patch 3 is bonded to the corresponding side surface S1 of the package side S by thermocompression; the end portion 321 of the bent portion 32 of the two insulating patches 3 is passed.
  • the overheating pressure is fixed together. First set the heat sealing equipment parameters, determine the heat sealing temperature, pressure, time, then use the mechanical arm to place the planar patch on the upper and lower sides of the package side S, then start the heat sealing equipment, apply a certain pressure to the upper and lower heads, heat up and keep After a while, heat sealing is completed to form the insulating patch 3.
  • the shape of the sealing head of the heat sealing device is matched with the shape of the insulating patch 3, and the sealing head is processed according to the shape of the corresponding insulating patch 3, and the sealing sealing of the insulating patch 3 is realized by the action of the upper and lower sealing heads.
  • the end portions 321 of the bent portions 32 of the two insulating patches 3 are fused together under high temperature and high pressure, thereby achieving seamless sealing connection of the two insulating patches 3, and the planar portions 31 of the two insulating patches 3 are The high temperature and high pressure are fused and bonded to the corresponding side surface S1, thereby sealing the outer end surface S2 of the package side S.
  • the heat sealing is realized by a special head, and the process is simple and efficient.
  • thermoplastic polymer material is polyimide or polypropylene.
  • a planar patch of a corresponding shape is prepared by a cutter or laser cutting.
  • the shape of the planar patch is designed according to the shape of the package side S of the battery cell 1 and a two-dimensional map is drawn, and then the two-dimensional image is input into the cutting device to set the laser beam cutting travel path. Then adjust the equipment parameters, adjust the laser beam diameter (preferably use a small diameter laser for cutting), and adjust the power and other parameters. Because the laser cutting is controlled by the robot, it has better flexibility, can meet the cutting of different positions, and can cut out the planar patch of the desired shape. Cutting the remaining thermoplastic material can be recycled for green recycling.
  • a battery edge-sealing method is used to form the battery edge-sealing structure of the first aspect of the present invention, comprising the steps of: providing a battery cell 1 in which a packaging film 2 is packaged, and a packaging film 2 surrounding the battery
  • the core 1 forms a package side S having two side faces S1 and one outer end face S2 between the two side faces S1;
  • the two planar patches are simultaneously hot-pressed, and the portions of the planar patches located on the corresponding side S1 are bonded and fixed on the side surface S1 and form the planar portion 31 of the insulating patch 3, and the two planar patches are extended.
  • the portion to the edge of the side S1 is bent to the outer end surface S2 of the package side S and forms a bent portion 32 corresponding to the insulating patch 3, and the end portions 321 of the two bent portions 32 are fixedly connected by thermocompression bonding.
  • the shape of each of the insulating patches 3 corresponds to the shape of the package side S.
  • the two planar patches are fixedly connected by the end portion 321 of the bent portion 32 formed by hot pressing, so that the bent portion 32 covers the outer end surface S2 of the package side S, In turn, the edge of the battery is achieved.
  • the battery of the present invention can be applied to various types of cells (especially a non-rectangular shaped battery with a battery outline), and has good applicability even if the outer contour of the package side S of the battery cell 1 is a non-linear edge (for example, an arc)
  • the two insulating patches 3 formed by the battery edge sealing method of the present invention can also completely cover the outer end surface S2 of the package side S, while avoiding problems such as wrinkling, overlapping or warping of the insulating patch 3, and improving The appearance of the battery cell 1 improves the quality of the battery edge seal.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本发明提供了一种电池封边结构及电池封边方法。电池封边结构包括电芯以及封装电芯的包装膜；包装膜围绕电芯形成封装边，封装边具有两个侧面和位于两个侧面之间的一个外端面。所述电池封边结构还包括两层绝缘贴片，各绝缘贴片的形状与封装边的形状相对应。各绝缘贴片具有：平面部，固定在封装边的对应侧面上；以及弯折部，弯折在封装边的外端面上。其中，两个绝缘贴片的弯折部的端部固定连接。在根据本发明的电池封边结构中，由于绝缘贴片的形状与封装边的形状相对应，所以绝缘贴片能够适用于各种类型的电芯，具有很好的适用性，同时避免绝缘贴片出现起皱、重叠或翘角等问题，改善电芯的外观，提高电池封边的质量。

Description

电池封边结构及电池封边方法 技术领域
本发明涉及电池制造领域，尤其涉及一种电池封边结构及电池封边方法。
背景技术
目前大部分的锂离子电池都采用包装膜进行电芯外包装，包装膜封装、切边后，封装边缘的中间层会裸露金属层，可能导致短路等问题。
现有电池边缘封边方法主要分为包胶和双折边工艺，包胶是在电池封装边边缘进行贴胶工序，然后采用机械方法将封装边折起；双折边方法则是将封装边的边缘翻折到封装边内部，再将封装边折起到电芯主体。两种方法均是为了避免边缘金属层外露。
传统的包胶或双折边工艺主要适用于形状规则的方形电池，对非矩形电池难以进行快速、有效地封边，特别对于异形电池(外轮廓非矩形的电池)的非直线边处理有明显的局限性：一方面，对于非直线边，胶带无法完整的包覆边缘，存在露金属风险；另一方面，对于圆角等弧形边，存在胶带起皱、重叠等问题，引起外观缺陷，同时胶带起始处和终止处，使用一定时间后可能翘起或翻角，引起外观缺陷和露金属风险。
发明内容
鉴于背景技术中存在的问题，本发明的目的在于提供一种电池封边结构及电池封边方法，其能适用于各种类型的电芯，具有很好的适用性，提高电池封边的质量。
为了实现上述目的，在第一方面，本发明提供了一种电池封边结构，其包括电芯以及封装电芯的包装膜；包装膜围绕电芯形成封装边，封装边具有两个侧面和位于两个侧面之间的一个外端面。所述电池封边结构还包括两层绝缘贴片，各绝缘贴片的形状与封装边的形状相对应。各绝缘贴片具有：平 面部，固定在封装边的对应侧面上；以及弯折部，弯折在封装边的外端面上。其中，两个绝缘贴片的弯折部的端部固定连接。
在根据本发明的第一方面的电池封边结构中，由于两个绝缘贴片的弯折部的端部固定连接，所以两个绝缘贴片的弯折部包覆封装边的外端面，进而实现电池的封边。同时，由于绝缘贴片的形状与封装边的形状相对应，所以绝缘贴片能够适用于各种类型的电芯，具有很好的适用性，即使电芯的封装边的外轮廓为非直线边，两个绝缘贴片也能够完全包覆封装边的外端面，同时避免绝缘贴片出现起皱、重叠或翘角等问题，改善电芯的外观，提高电池封边的质量。
为了实现上述目的，在第二方面，本发明提供了一种电池封边方法，其用于形成本发明第一方面的电池封边结构，包括步骤：①：提供封装有包装膜的电芯，包装膜围绕电芯形成封装边，封装边具有两个侧面和位于两个侧面之间的一个外端面；②：提供形状与电芯的封装边的侧面对应的两个平面贴片，各平面贴片用于形成一个绝缘贴片；③：将两个平面贴片分别放置在封装边的对应侧面上，且平面贴片的边缘伸出到侧面的边缘外；④：对两个平面贴片同时进行热压，各平面贴片位于在对应侧面上的部分粘接固定在侧面上并形成绝缘贴片的平面部，两个平面贴片伸出到侧面边缘的部分弯折到封装边的外端面上并形成对应绝缘贴片的弯折部，且两个弯折部的端部通过热压粘接而固定连接在一起，以使各绝缘贴片的形状与封装边的形状相对应。
在根据本发明第二方面的电池封边方法中，两个平面贴片通过热压形成的弯折部的端部固定连接，所以弯折部包覆封装边的外端面，进而实现电池的封边。同时，由于热压前平面贴片的形状与电芯的封装边的侧面对应，且热压后形成的绝缘贴片的形状与封装边的形状相对应，所以本发明的电池封边方法能够适用于各种类型的电芯，具有很好的适用性，即使电芯的封装边的外轮廓为非直线边，本发明的电池封边方法形成的两个绝缘贴片也能够完全包覆封装边的外端面，同时避免绝缘贴片出现起皱、重叠或翘角等问题，改善电芯的外观，提高电池封边的质量。
附图说明
图1为根据本发明的电池封边结构的示意图；
图2为根据本发明的电池封边结构的截面图；
图3为形成图1的绝缘贴片的平面贴片的示意图；
图4为图1的封装电芯封边前的包装膜的俯视图；
图5为图4的前视图。
其中，附图标记说明如下：
1电芯                           31平面部
2包装膜                         32弯折部
21内融合层                      321端部
22外保护层                      S封装边
23金属层                        S1侧面
3绝缘贴片                       S2外端面
具体实施方式
下面参照附图来详细说明本发明的电池封边结构及电池封边方法。
首先说明根据本发明第一方面的电池封边结构。
参照图1至图5，根据本发明的电池封边结构包括电芯1以及封装电芯1的包装膜2；包装膜2围绕电芯1形成封装边S，封装边S具有两个侧面S1和位于两个侧面S1之间的一个外端面S2。
所述电池封边结构还包括两层绝缘贴片3，各绝缘贴片3的形状与封装边S的形状相对应。各绝缘贴片3具有：平面部31，固定在封装边S的对应侧面S1上；以及弯折部32，弯折在封装边S的外端面S2上。其中，两个绝缘贴片3的弯折部32的端部321固定连接。
在根据本发明的电池封边结构中，由于两个绝缘贴片3的弯折部32的端部321固定连接，所以两个绝缘贴片3的弯折部32包覆封装边S的外端面S2，进而实现电池的封边。同时，由于绝缘贴片3的形状与封装边S的形状相对应，所以绝缘贴片3能够适用于各种类型的电芯(尤其是电池轮廓为非矩形的异形电池)，具有很好的适用性，即使电芯1的封装边S的外轮廓为非直线边(例如弧形边)，两个绝缘贴片3也能够完全包覆封装边S的外 端面S2，同时避免绝缘贴片3出现起皱、重叠或翘角等问题，改善电芯1的外观，提高电池封边的质量。
在根据本发明的电池封边结构中，参照图2，包装膜2包括内融合层21、外保护层22以及位于内融合层21和外保护层22之间的金属层23；封装边S的外端面S2露出金属层23。封装边S上的两层包装膜2的内融合层21通过热压融合在一起，以实现两层包装膜2的密封连接。热压完成后需要切去封装边S上多余的部分，所以会在封装边S的外端面S2上露出金属层23，金属层露出容易导致电芯1的短路和金属层23的腐蚀。而由于两个绝缘贴片3的弯折部32包覆封装边S的外端面S2，可以实现金属层23的密封，避免金属层23露出(也就是电池封边工艺)。
所述“绝缘贴片3的形状与封装边S的形状相对应”中“相对应”是指绝缘贴片3各部分的形状与封装边S对应部分的形状相同或形状相似。
在根据本发明的电池封边结构中，参照图1和图4，各绝缘贴片3的平面部31的形状与封装边S的侧面S1的形状相同或形状相似；参照图1和图5，各绝缘贴片3的弯折部32的形状与封装边S的外端面S2的形状相同或形状相似。
在根据本发明的电池封边结构中，参照图2和图3，绝缘贴片3由等宽度的平面贴片弯折而成。
在根据本发明的电池封边结构中，参照图1、图3和图4，所述平面贴片弯折前的形状与封装边S的侧面S1的形状相同或形状相似。
在根据本发明的电池封边结构中，通过切刀或激光切割制备对应形状的弯折前的平面贴片。
在此补充的是，所述“形状相同”是指形状完全相同或几何相似，所述“形状相似”是指形状大体接近“形状相同”，只是某些尺寸存在少许偏差，不影响整体形状。例如，封装边S的侧面S1的形状为L形或弧形(具有一定宽度)，那么平面贴片弯折前的形状也是L形或弧形。
在根据本发明的电池封边结构中，绝缘贴片3由热塑性高分子材料制成。所以绝缘贴片3具有一定的热塑性，便于两个绝缘贴片3的密封连接。
在根据本发明的电池封边结构中，绝缘贴片3的平面部31通过热压粘接在封装边S的对应侧面S1上；两个绝缘贴片3的弯折部32的端部321通 过热压固定在一起。首先设置热封设备参数，确定热封温度、压力、时间，接着采用机械手臂将平面贴片放置于封装边S上下两侧，随后启动热封设备，上下封头施加一定压力，加热升温，保持一段时间，完成热封以形成绝缘贴片3。热封设备的封头形状与绝缘贴片3形状相吻合，依据对应的绝缘贴片3形状加工制造封头，通过上下封头作用实现绝缘贴片3的一次密封封边。两个绝缘贴片3的弯折部32的端部321在高温高压下融合粘接在一起，从而实现两个绝缘贴片3的无缝密封连接，两个绝缘贴片3的平面部31在高温高压下融合粘接到对应侧面S1上，进而密封包覆封装边S的外端面S2。通过特制的封头实现一次热封，工序简单、效率高。
在根据本发明的电池封边结构中，所述热塑性高分子材料为聚酰亚胺或聚丙烯。
在根据本发明的电池封边结构中，通过切刀或激光切割制备对应形状的平面贴片(即热封前的绝缘贴片3)。依据电芯1的封装边S的形状设计平面贴片的形状并绘制二维图，然后将二维图输入切割设备，设定激光束切割行走路径。接着调整设备参数，调节激光束直径(优先采用小直径的激光进行切割)，同时调整功率等参数。由于激光切割采用机器人控制，因此具有较好的柔性，可以满足不同位置的切割，可以切割出所需形状的平面贴片。切割剩余的热塑性材料可以回收再利用，实现绿色循环。
其次说明根据本发明第二方面的电池封边方法。
参照图1至图5，根据本发明的电池封边方法用于形成本发明第一方面的电池封边结构，包括步骤：①：提供封装有包装膜2的电芯1，包装膜2围绕电芯1形成封装边S，封装边S具有两个侧面S1和位于两个侧面S1之间的一个外端面S2；②：提供形状与电芯1的封装边S的侧面S1对应的两个平面贴片，各平面贴片用于形成一个绝缘贴片3；③：将两个平面贴片分别放置在封装边S的对应侧面S1上，且平面贴片的边缘伸出到侧面S1的边缘外；④：对两个平面贴片同时进行热压，各平面贴片位于在对应侧面S1上的部分粘接固定在侧面S1上并形成绝缘贴片3的平面部31，两个平面贴片伸出到侧面S1边缘的部分弯折到封装边S的外端面S2上并形成对应绝缘贴片3的弯折部32，且两个弯折部32的端部321通过热压粘接而固定连接 在一起，以使各绝缘贴片3的形状与封装边S的形状相对应。
在根据本发明第二方面的电池封边方法中，两个平面贴片通过热压形成的弯折部32的端部321固定连接，所以弯折部32包覆封装边S的外端面S2，进而实现电池的封边。同时，由于热压前平面贴片的形状与电芯1的封装边S的侧面S1对应，且热压后形成的绝缘贴片3的形状与封装边S的形状相对应，所以本发明的电池封边方法能够适用于各种类型的电芯(尤其是电池轮廓为非矩形的异形电池)，具有很好的适用性，即使电芯1的封装边S的外轮廓为非直线边(例如弧形边)，本发明的电池封边方法形成的两个绝缘贴片3也能够完全包覆封装边S的外端面S2，同时避免绝缘贴片3出现起皱、重叠或翘角等问题，改善电芯1的外观，提高电池封边的质量。

Claims (10)

  1. 一种电池封边结构，包括电芯(1)以及封装电芯(1)的包装膜(2)；
    包装膜(2)围绕电芯(1)形成封装边(S)，封装边(S)具有两个侧面(S1)和位于两个侧面(S1)之间的一个外端面(S2)；
    其特征在于，
    所述电池封边结构还包括两个绝缘贴片(3)，各绝缘贴片(3)的形状与封装边(S)的形状相对应；
    各绝缘贴片(3)具有：
    平面部(31)，固定在封装边(S)的对应侧面(S1)上；以及
    弯折部(32)，弯折在封装边(S)的外端面(S2)上；
    其中，两个绝缘贴片(3)的弯折部(32)的端部(321)固定连接。
  2. 根据权利要求1所述的电池封边结构，其特征在于，
    包装膜(2)包括内融合层(21)、外保护层(22)以及位于内融合层(21)和外保护层(22)之间的金属层(23)；
    封装边(S)的外端面(S2)露出金属层(23)。
  3. 根据权利要求1所述的电池封边结构，其特征在于，
    各绝缘贴片(3)的平面部(31)的形状与封装边(S)的侧面(S1)的形状相同或相似；
    各绝缘贴片(3)的弯折部(32)的形状与封装边(S)的外端面(S2)的形状相同或相似。
  4. 根据权利要求1所述的电池封边结构，其特征在于，绝缘贴片(3)由等宽度的平面贴片弯折而成。
  5. 根据权利要求4所述的电池封边结构，其特征在于，所述平面贴片弯折前的形状与封装边(S)的侧面(S1)的形状相同或相似。
  6. 根据权利要求5所述的电池封边结构，其特征在于，通过切刀或激光切割制备对应形状的弯折前的平面贴片。
  7. 根据权利要求1所述的电池封边结构，其特征在于，绝缘贴片(3)由热塑性高分子材料制成。
  8. 根据权利要求7所述的电池封边结构，其特征在于，
    绝缘贴片(3)的平面部(31)通过热压粘接在封装边(S)的对应侧面(S1)上；
    两个绝缘贴片(3)的弯折部(32)的端部(321)通过热压固定在一起。
  9. 根据权利要求7所述的电池封边结构，其特征在于，所述热塑性高分子材料为聚酰亚胺或聚丙烯。
  10. 一种电芯封边方法，用于形成根据权利要求1所述的电池封边结构，包括步骤：
    ①：提供封装有包装膜(2)的电芯(1)，包装膜(2)围绕电芯(1)形成封装边(S)，封装边(S)具有两个侧面(S1)和位于两个侧面(S1)之间的一个外端面(S2)；
    ②：提供形状与电芯(1)的封装边(S)的侧面(S1)对应的两个平面贴片，各平面贴片用于形成一个绝缘贴片(3)；
    ③：将两个平面贴片分别放置在封装边(S)的对应侧面(S1)上，且平面贴片的边缘伸出到侧面(S1)的边缘外；
    ④：对两个平面贴片同时进行热压，各平面贴片位于在对应侧面(S1)上的部分粘接固定在侧面(S1)上并形成绝缘贴片(3)的平面部(31)，两个平面贴片伸出到侧面(S1)边缘的部分弯折到封装边(S)的外端面(S2)上并形成对应绝缘贴片(3)的弯折部(32)，且两个弯折部(32)的端部(321)通过热压粘接而固定连接在一起，以使各绝缘贴片(3)的形状与封装边(S)的形状相对应。
PCT/CN2016/098925 2016-09-13 2016-09-13 电池封边结构及电池封边方法 WO2018049572A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098925 WO2018049572A1 (zh) 2016-09-13 2016-09-13 电池封边结构及电池封边方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098925 WO2018049572A1 (zh) 2016-09-13 2016-09-13 电池封边结构及电池封边方法

Publications (1)

Publication Number Publication Date
WO2018049572A1 true WO2018049572A1 (zh) 2018-03-22

Family

ID=61618539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/098925 WO2018049572A1 (zh) 2016-09-13 2016-09-13 电池封边结构及电池封边方法

Country Status (1)

Country Link
WO (1) WO2018049572A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109309259A (zh) * 2018-11-12 2019-02-05 东莞市爱康电子科技有限公司 一种自动贴胶折极耳设备
CN112768783A (zh) * 2021-01-07 2021-05-07 Oppo广东移动通信有限公司 电池组件及其制备方法、电子设备
CN113113703A (zh) * 2021-04-02 2021-07-13 惠州市超聚电池有限公司 圆柱形软包电池的封边方法及圆柱形软包电池
CN113839081A (zh) * 2021-08-12 2021-12-24 曙鹏科技（深圳）有限公司 一种锂离子电池制备方法
CN114914590A (zh) * 2022-05-27 2022-08-16 重庆市紫建新能源有限公司 一种圆环电池的制造方法及其圆环电池

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224147A (ja) * 2008-03-14 2009-10-01 Nec Corp フィルム外装電気デバイス及び組電池
CN102969533A (zh) * 2012-07-10 2013-03-13 东莞新能源科技有限公司 一种软包锂离子电池的折边结构及其制作方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224147A (ja) * 2008-03-14 2009-10-01 Nec Corp フィルム外装電気デバイス及び組電池
CN102969533A (zh) * 2012-07-10 2013-03-13 东莞新能源科技有限公司 一种软包锂离子电池的折边结构及其制作方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109309259A (zh) * 2018-11-12 2019-02-05 东莞市爱康电子科技有限公司 一种自动贴胶折极耳设备
CN109309259B (zh) * 2018-11-12 2024-05-14 东莞市爱康智能技术股份有限公司 一种自动贴胶折极耳设备
CN112768783A (zh) * 2021-01-07 2021-05-07 Oppo广东移动通信有限公司 电池组件及其制备方法、电子设备
CN113113703A (zh) * 2021-04-02 2021-07-13 惠州市超聚电池有限公司 圆柱形软包电池的封边方法及圆柱形软包电池
CN113113703B (zh) * 2021-04-02 2022-09-16 惠州市超聚电池有限公司 圆柱形软包电池的封边方法及圆柱形软包电池
CN113839081A (zh) * 2021-08-12 2021-12-24 曙鹏科技（深圳）有限公司 一种锂离子电池制备方法
CN114914590A (zh) * 2022-05-27 2022-08-16 重庆市紫建新能源有限公司 一种圆环电池的制造方法及其圆环电池

Similar Documents

Publication Publication Date Title
WO2018049572A1 (zh) 电池封边结构及电池封边方法
CN108054301A (zh) 一种软包锂离子电池的折边结构及其制作方法
WO2019127107A1 (zh) 一种电池
CN108574025B (zh) 叠瓦组件的制作方法
TWI496332B (zh) Curved battery and its making method
JP6560877B2 (ja) ラミネート形電池及びその製造方法
CN203707224U (zh) 正极片隔膜袋及带该隔膜袋的叠片锂离子电池
WO2024045738A1 (zh) 电池和电池的制备方法
CN108428812B (zh) 包装壳及软包电池
CN202134624U (zh) 软包装锂电池封边固定结构
CN108428814B (zh) 包装膜及软包电池
CN108428813A (zh) 软包电池
CN108428809A (zh) 软包电池
CN207038612U (zh) 一种软包装叠片式锂离子电池及其极耳
CN104051679B (zh) 电化学电池以及电化学电池的制造方法
CN206558627U (zh) 一种卷绕式电池
CN112277327A (zh) 石墨或石墨烯类产品及其包边方法
CN206907866U (zh) 一种软包装锂离子电池折边和包膜一体机
CN113839081B (zh) 一种锂离子电池制备方法
CN206116434U (zh) 手持式胶带封边工具
CN214384785U (zh) 一种两端导出极耳软包动力电池
CN114069052A (zh) 电芯封装方法及电池的制备方法
JP4702969B2 (ja) 薄型電池の製造方法
CN112968218A (zh) 一种增强软包电池顶底封封装可靠性的方法
CN215509926U (zh) 一种低自放电锂离子电池极耳点焊与圆角切割装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16915957

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16915957

Country of ref document: EP

Kind code of ref document: A1