WO2018049573A1 - 电芯封边处理工艺及电芯封边处理装置 - Google Patents

电芯封边处理工艺及电芯封边处理装置 Download PDF

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Publication number
WO2018049573A1
WO2018049573A1 PCT/CN2016/098926 CN2016098926W WO2018049573A1 WO 2018049573 A1 WO2018049573 A1 WO 2018049573A1 CN 2016098926 W CN2016098926 W CN 2016098926W WO 2018049573 A1 WO2018049573 A1 WO 2018049573A1
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Prior art keywords
edge
outer contour
sealing
cell
dimensional trajectory
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PCT/CN2016/098926
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English (en)
French (fr)
Inventor
张亚杰
何平
郭培培
殷科
程文强
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东莞新能源科技有限公司
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Priority to PCT/CN2016/098926 priority Critical patent/WO2018049573A1/zh
Publication of WO2018049573A1 publication Critical patent/WO2018049573A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/02—Details
    • 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 core sealing treatment process and a battery core sealing processing device.
  • the bare cell of the lithium battery is covered by the upper and lower packaging films, there is a thin metal layer on the outer contour of the edge formed by the thermocompression bonding of the two packaging films, and the metal layer is exposed to the risk of short-circuiting the electrical components, and Corrosion of the metal layer during long-term use poses a safety hazard to the safety of the battery core.
  • the sealing edges of the two packaging films after hot pressing are easily cracked at the outer contour (after long-term use, the two packaging films at the outer contour of the sealing edge are separated due to insufficient bonding strength).
  • the edge sealing process is to cover the outer contour of the sealing edge with a rubber strip, which can prevent the occurrence of the exposed metal, and can also prevent the sealing edge of the two packaging films from being cracked at the outer contour.
  • the existing edge sealing treatment process is limited to rectangular batteries with regular shapes, and the equipment only needs to be positioned, glued, and folded. When the battery core is non-rectangular or other complicated structure, the equipment will not be able to move linearly at the edge of the packaging film due to design problems, and the rubber strip cannot be completely covered on the outer contour of the sealing edge, which may cause the risk of metal exposure or cracking. Therefore, the conventional solution cannot be applied to non-rectangular cells.
  • the object of the present invention is to provide a cell edge sealing process and a cell edge sealing device, which can be applied to various types of cells, and reduce the development difficulty and equipment of the glue coating process. The cost of development and the quality of the glue can be guaranteed.
  • the present invention provides a cell edge sealing process: first, a cell to be coated is positioned, wherein the edge of the cell is sealed and connected by two layers of packaging film. Secondly, the outer contour of the edge of the cell is collected and fitted to the three-dimensional trajectory; finally, the insulating glue is applied along the fitted three-dimensional trajectory.
  • the present invention provides a cell edge sealing processing apparatus
  • the utility model comprises: a positioning fixture for positioning the glued battery core; a trajectory fitting mechanism, collecting the outer contour of the edge of the battery core and fitting the three-dimensional trajectory, wherein the sealing edge of the battery core is sealed and connected by the upper and lower layers of the packaging film; And a gluing mechanism controlled by a trajectory fitting mechanism and coated with an insulating glue along the fitted three-dimensional trajectory.
  • the trajectory fitting mechanism can collect the outer contour of the edge of the battery of various shapes and fit the three-dimensional trajectory, so the battery of the present invention
  • the edge sealing treatment process and the cell edge sealing treatment device have better flexibility and compatibility, can meet the coating requirements of various types of batteries, reduce the development difficulty of the coating process and the cost of equipment development, and improve the equipment.
  • the glue coating mechanism applies the insulating glue along the fitted three-dimensional trajectory, the formed glue layer fits the outer contour of the edge of the battery core, thereby ensuring that the outer edge contour of the battery core is completely covered. Improve the coating quality of the insulating glue and prevent the two-layer packaging film from cracking at the outer contour of the sealing edge.
  • Figure 1 is a schematic view of a cell edge sealing apparatus according to the present invention.
  • Figure 2 is a schematic view showing the glue coating of the cell edge sealing treatment device according to the present invention.
  • Figure 3 is a side view of Figure 2;
  • Figure 4 is another side view of Figure 2.
  • the cell B to be glued is positioned, wherein the edge of the cell B is sealed and connected by two upper and lower packaging films; Secondly, the outer contour of the edge of the battery B is collected and the three-dimensional trajectory is fitted; finally, the insulating glue is applied along the fitted three-dimensional trajectory.
  • the outer contour of the edge of the battery of various shapes can be collected and the three-dimensional trajectory can be fitted, so the cell edge sealing process of the present invention has better flexibility and phase. Capacitive, can be applied to various types of cells (especially non-rectangular cells).
  • the cell edge sealing process of the present invention coats the insulating glue along the fitted three-dimensional trajectory, and the formed glue layer fits the outer contour of the edge of the battery core B, thereby ensuring that the outer edge contour of the battery core B is Completely coated to improve the coating quality of the insulating glue, to prevent the two-layer packaging film from cracking at the outer contour of the sealing edge.
  • the battery core is a soft-packed battery
  • the packaging film may be an aluminum plastic film or a steel plastic film.
  • the edge seal is a portion of the two packaging films that are joined by heat sealing.
  • the cell B is positioned by the positioning jig 1 with reference to FIGS. 1 to 4.
  • the outer contour of the edge of the cell B in the XY plane is first scanned by the CCD camera and transmitted to the processing system 22 to fit the outer contour of the edge banding.
  • the two-dimensional trajectory is then measured by the laser range finder 23 to measure the undulation of the two-dimensional trajectory of the outer contour of the rim in the Z direction, thereby fitting the three-dimensional trajectory of the outer contour of the sealing edge.
  • the XY plane is a plane composed of the X direction and the Y direction, and the X direction, the Y direction, and the Z direction are perpendicular to each other.
  • the processing system 22 selects a plurality of points and fits the two-dimensional trajectory of the outer contour of the edge banding; and then measures the outer contour of the edge band using the laser range finder 23 The undulating change of the two-dimensional trajectory in the Z direction, that is, measuring the position coordinate change of each point on the two-dimensional trajectory in the Z direction, thereby fitting the three-dimensional trajectory of the outer contour of the sealing edge.
  • the laser probe and the edge of the laser rangefinder 23 are externally sealed.
  • the distance between the contours in the Z direction does not exceed 10 mm, and an excessively long distance may result in inaccurate testing.
  • the edge of the cell B is hot pressed so that the outer contour of the edge is constant in the Z direction;
  • the outer contour of the edge of the battery B in the XY plane is scanned by the CCD camera and transmitted everywhere.
  • the system 22 is adapted to fit the two-dimensional trajectory of the outer contour of the sealing edge. Since the outer contour of the sealing edge is constant in the Z direction, the three-dimensional trajectory of the outer contour of the sealing edge can be directly fitted; wherein the XY plane is the X direction and Y The plane formed by the directions, the X direction, the Y direction, and the Z direction are perpendicular to each other.
  • the edge seal of the cell B can be hot pressed before the cell B is positioned and glued, and the hot pressing temperature should be 80 ° C - 130 ° C, and the pressure is selected 50 - 100N, the hot pressing time is less than 5s.
  • the hot pressing temperature should be 80 ° C - 130 ° C, and the pressure is selected 50 - 100N, the hot pressing time is less than 5s.
  • Excessive hot pressing parameters of this specification may cause damage to the packaging film (such as aluminum plastic film), melting of the film layer, and insufficient hot pressing.
  • the applied insulating glue is a heat curing glue, a photoinitiating curing glue or a hot melt adhesive.
  • These glues have the advantages of fast forming speed, good maneuverability and controllable window time.
  • the curing speed will affect the efficiency of the cell produced per unit time, and the controllability of the window time can ensure sufficient time to complete the specific process steps.
  • Other types do not meet the above requirements.
  • the glue may be cracked or melted, and the section protection may be invalidated.
  • the viscosity of the insulating paste is from 5,000 cP to 1,000,000 cP.
  • the viscosity of the insulating glue should be selected appropriately.
  • the glue with too low viscosity will cause the liquid column to break, causing the colloid to be discontinuous, or the liquid flowing through the cross section to form a gap, causing the metal layer to be exposed.
  • a glue with too high viscosity causes a decrease in fluidity, and the liquid does not smoothly flow to the cross section, causing the metal layer of the cross section to be exposed.
  • the excessive viscosity of the colloids causes the narrow slits to be blocked by the glue, posing a potential risk in subsequent folding or use.
  • the outer edge of the sealing edge of the battery core B is coated with an insulating rubber by a glue gun 31; by adjusting the diameter and length of the needle 311 on the glue gun 31. To adjust the flow rate and flow rate of the insulation.
  • a needle 311 having a larger diameter can be selected.
  • a stable pressure is applied to the glue gun 31 to ensure a stable outflow of the glue.
  • the glue gun 31 is perpendicular to the traveling direction of the glue application position; referring to FIG. 4, the angle between the glue gun 31 and the XY plane is 45 to 60. °, the XY plane is a plane composed of the X direction and the Y direction, and the X direction and the Y direction are perpendicular to each other.
  • the processing system 22 can adjust the direction of the glue gun 31 at a position such as a corner, an arc, or the like according to the three-dimensional trajectory of the fitted outer contour of the seal to satisfy the above angle requirement.
  • the battery B is moved into an ultraviolet light environment or a thermal environment (depending on the type of the insulating glue) Ding), the glue is cured; after complete curing, the hemming is performed.
  • the edge of the cell B exposes the metal at the outer contour, and the coated insulating rubber coats the metal.
  • the rubber layer formed by the cell edge sealing treatment process of the invention closely fits the outer contour of the edge of the battery core B, thereby ensuring that the metal exposed by the outer contour of the sealing edge of the battery core B is completely covered, thereby improving the coating quality of the insulating rubber. To avoid short circuit of battery B and corrosion of metal.
  • a cell edge sealing apparatus includes: a positioning jig 1 for positioning a cell B to be glued; and a track fitting mechanism 2 for collecting an outer contour of the edge of the cell B And fitting a three-dimensional trajectory, wherein the sealing edge of the battery core B is sealed and connected by two upper and lower packaging films; and the rubber coating mechanism 3 is controlled by the trajectory fitting mechanism 2 and applies the insulating rubber along the fitted three-dimensional trajectory.
  • the trajectory fitting mechanism 2 is capable of collecting the outer contour of the edge of the battery of various shapes and fitting the three-dimensional trajectory, so that the cell edge sealing device of the present invention has more Good flexibility and compatibility, can meet the coating requirements of various types of batteries, reduce the development difficulty of the glue coating process and the cost of equipment development, improve the stability of the equipment; at the same time, because the glue coating mechanism 3
  • the three-dimensional track is coated with insulating glue, so the formed glue layer fits the outer contour of the sealing edge of the battery core B, thereby ensuring that the outer contour of the sealing edge of the battery core B is completely covered, thereby improving the coating quality of the insulating rubber and avoiding
  • the two-layer packaging film is split at the outer contour of the edge seal.
  • the positioning jig 1 can be provided with a suction cup to fix the battery cell B by suction.
  • the trajectory fitting mechanism 2 includes: a CCD camera 21, an outer contour of the edge of the scanning cell B on the XY plane; a processing system 22, and a CCD camera 21 is connected, and a two-dimensional trajectory of the outer contour of the sealing edge is fitted according to the outer contour scanned by the CCD camera 21.
  • the trajectory fitting mechanism 2 further includes a laser range finder 23 connected to the processing system 22 to measure the two-dimensional trajectory of the outer contour of the rim in the Z direction.
  • the undulations are varied and combined by the processing system 22 with the two-dimensional trajectory of the outer contour of the edging to fit the three-dimensional trajectory of the outer contour of the rim.
  • the two-dimensional trajectory of the outer contour of the sealing edge can be directly fitted.
  • the fluctuation of the two-dimensional trajectory of the outer contour of the sealing edge in the Z direction can be measured by the laser range finder 23, and then Combine the three-dimensional trajectory of the outer contour of the edge seal.
  • the glue applying mechanism 3 includes: a glue gun 31 which internally houses an insulating glue and has a needle 311; and a driving mechanism 32 which is connected to the glue gun 31 and is guided by the track
  • the fitting mechanism 2 controls to drive the glue gun 31 to apply the insulating glue along the fitted three-dimensional trajectory.
  • the sealing edge of the battery cell B exposes the metal at the outer contour, and the insulating rubber coated with the rubber coating mechanism 3 coats the metal.
  • the rubber layer coated by the rubber coating mechanism 3 fits the outer contour of the sealing edge of the battery core B, thereby ensuring that the metal exposed by the outer edge of the sealing edge of the battery core B is completely coated, improving the coating quality of the insulating rubber and avoiding the battery core. B short circuit and corrosion of metal.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • 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芯封边处理工艺及电芯封边处理装置。在电芯封边处理工艺中，首先，对待涂胶的电芯进行定位，其中电芯的封边由上下两层包装膜密封连接而成；其次，采集电芯的封边的外轮廓并拟合三维轨迹；最后，沿拟合的三维轨迹涂覆绝缘胶。电芯封边处理装置包括：定位夹具，以对待涂胶的电芯进行定位；轨迹拟合机构，采集电芯的封边的外轮廓并拟合三维轨迹，其中电芯的封边由上下两层包装膜密封连接而成；以及涂胶机构，由轨迹拟合机构控制并沿拟合的三维轨迹涂覆绝缘胶。本发明的电芯封边处理工艺及电芯封边处理装置能适用于各种类型的电芯，降低涂胶工艺的开发难度和设备开发的成本，并能够保证涂胶质量。

Description

电芯封边处理工艺及电芯封边处理装置 技术领域
本发明涉及电池制造领域，尤其涉及一种电芯封边处理工艺及电芯封边处理装置。
背景技术
锂电池裸电芯被上下两个包装膜包覆后，在两个包装膜热压连接形成的封边的外轮廓会存在很细的金属层，金属层裸露有导致电器元件短路的风险，并在长期使用过程中金属层的腐蚀对电芯安全存在安全隐患。另外，热压后的两个包装膜的封边在外轮廓处容易裂开(在长期使用后，封边外轮廓处的两个包装膜由于粘接强度不足而分离)。而封边处理工艺就是用胶条覆盖封边的外轮廓，既可防止露金属发生，也可以避免两个包装膜的封边在外轮廓处裂开。现有的封边处理工艺都局限于形状规则的矩形电芯，设备只需要做到电芯定位、包胶、折边即可。当电芯为非矩形或者其他复杂结构时，设备会因设计问题无法在包装膜边缘做直线运动，胶条无法完整的包覆在封边的外轮廓，产生露金属或裂开风险。所以传统方案无法应用于非矩形的电芯。
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芯封边处理工艺及电芯封边处理装置，其能适用于各种类型的电芯，降低涂胶工艺的开发难度和设备开发的成本，并能够保证涂胶质量。
为了实现上述目的，在第一方面，本发明提供了一种电芯封边处理工艺：首先，对待涂胶的电芯进行定位，其中电芯的封边由上下两层包装膜密封连接而成；其次，采集电芯的封边的外轮廓并拟合三维轨迹；最后，沿拟合的三维轨迹涂覆绝缘胶。
为了实现上述目的，在第二方面，本发明提供了一种电芯封边处理装置， 其包括：定位夹具，以对待涂胶的电芯进行定位；轨迹拟合机构，采集电芯的封边的外轮廓并拟合三维轨迹，其中电芯的封边由上下两层包装膜密封连接而成；以及涂胶机构，由轨迹拟合机构控制并沿拟合的三维轨迹涂覆绝缘胶。
本发明的有益效果如下：
在根据本发明的电芯封边处理工艺及电芯封边处理装置中，轨迹拟合机构能够采集各种形状的电芯的封边的外轮廓并拟合三维轨迹，所以本发明的电芯封边处理工艺及电芯封边处理装置具有更好的柔性和相容性，能够满足各种类型的电芯的涂胶要求，降低了涂胶工艺的开发难度和设备开发的成本，提高设备的稳定性；同时，由于涂胶机构沿拟合的三维轨迹涂覆绝缘胶，所以形成的胶层非常契合电芯的封边的外轮廓，从而保证电芯的封边外轮廓被完全包覆，提高绝缘胶的涂覆质量，避免两层包装膜在封边外轮廓处裂开。
附图说明
图1为根据本发明的电芯封边处理装置的示意图；
图2为根据本发明的电芯封边处理装置涂胶的示意图；
图3为图2的一侧视图；
图4为图2的另一侧视图。
其中，附图标记说明如下：
1定位夹具                      3涂胶机构
2轨迹拟合机构                  31胶枪
21CCD摄像头                    311针头
22处理系统                     32驱动机构
23激光测距仪                   B电芯
具体实施方式
下面参照附图来详细说明本发明的电芯封边处理工艺及电芯封边处理装置。
首先说明根据本发明第一方面的电芯封边处理工艺。
参照图1至图4，在根据本发明的电芯封边处理工艺中，首先，对待涂胶的电芯B进行定位，其中电芯B的封边由上下两层包装膜密封连接而成；其次，采集电芯B的封边的外轮廓并拟合三维轨迹；最后，沿拟合的三维轨迹涂覆绝缘胶。
在根据本发明的电芯封边处理工艺中，能够采集各种形状的电芯的封边的外轮廓并拟合三维轨迹，所以本发明的电芯封边处理工艺具有更好的柔性和相容性，能够适用于各种类型的电芯(特别是非矩形电芯)。同时，本发明的电芯封边处理工艺沿着拟合的三维轨迹涂覆绝缘胶，形成的胶层非常契合电芯B的封边的外轮廓，从而保证电芯B的封边外轮廓被完全包覆，提高绝缘胶的涂覆质量，避免两层包装膜在封边外轮廓处裂开。
在此补充的是，所述电芯为软包电芯，包装膜可为铝塑膜或钢塑膜。封边为两个包装膜通过热压密封连接的部分。
在根据本发明的电芯封边处理工艺中，参照图1至图4，利用定位夹具1对电芯B进行定位。
在根据本发明的电芯封边处理工艺中，参照图1，首先利用CCD摄像头扫描电芯B的封边在XY平面上的外轮廓，并传输到处理系统22以拟合出封边外轮廓的二维轨迹；然后利用激光测距仪23测量封边外轮廓的二维轨迹在Z方向上的起伏变化，进而拟合出封边外轮廓的三维轨迹。其中，XY平面为X方向和Y方向组成的平面，X方向、Y方向和Z方向相互垂直。CCD摄像头扫描电芯B的封边在XY平面上的外轮廓后，处理系统22选取多个点并拟合出封边外轮廓的二维轨迹；然后利用激光测距仪23测量封边外轮廓的二维轨迹在Z方向上的起伏变化，也就是测量二维轨迹上各点在Z方向上的位置坐标变化，从而拟合出封边外轮廓的三维轨迹。
在根据本发明的电芯封边处理工艺中，在利用激光测距仪23测量封边外轮廓的二维轨迹在Z方向上的起伏变化时，激光测距仪23的激光探头与封边外轮廓之间在Z方向上的距离不超过10mm，过长的距离会导致测试不准确。
在根据本发明的电芯封边处理工艺中，在对待涂胶的电芯B进行定位前，对电芯B的封边进行热压，以使封边外轮廓在Z方向上恒定无变化；参照图1，利用CCD摄像头扫描电芯B的封边在XY平面上的外轮廓，并传输到处 理系统22以拟合出封边外轮廓的二维轨迹，由于封边外轮廓在Z方向上恒定，进而可直接拟合出封边外轮廓的三维轨迹；其中，XY平面为X方向和Y方向组成的平面，X方向、Y方向和Z方向相互垂直。
在根据本发明的电芯封边处理工艺中，在对电芯B定位涂胶前，可对电芯B的封边进行热压，热压温度应采用80℃-130℃，压力选择50-100N，热压时间小于5s，超出此规格的热压参数会导致包装膜(例如铝塑膜)受损，薄膜层融化，热压不够彻底等问题。
在根据本发明的电芯封边处理工艺中，涂覆的绝缘胶为热固化胶、光引发固化胶或热熔胶。这些胶水具有成型速度快、可操控性好、窗口时间可控的优势。在大批量生产的过程中，固化速度将影响单位时间出产电芯的效率，窗口时间的可控性可以保证足够的时间完成特定工艺步骤。其他类型并不能满足以上需求，同时在折边过程和烫边过程中可能会导致胶水开裂或融化，使断面保护失效。
在根据本发明的电芯封边处理工艺中，绝缘胶的粘度为5000cP～1000000cP。绝缘胶的粘度选择要适当，粘度过低的胶水将造成液体柱断开，导致胶体不连续，或液体流过断面而形成缺口，造成金属层露出。粘度过高的胶水会导致流动性降低，液体不能顺畅的流至断面，造成断面部分金属层露出。同时，对于某些带有狭窄细缝涂胶的区域，胶体粘度过大会导致窄细缝被胶堵死，在以后的折边或使用过程中产生潜在的风险。
在根据本发明的电芯封边处理工艺中，参照图1至图4，利用胶枪31对电芯B的封边外轮廓涂覆绝缘胶；通过调整胶枪31上针头311的直径和长度来调整绝缘胶的流量和流速。对涂胶的宽度要求较大时，可选用直径较大的针头311。在涂胶的过程中，对胶枪31施加稳定的压力，以保证胶水稳定的流出。
在根据本发明的电芯封边处理工艺中，参照图2和图3，胶枪31与涂胶位置的行进方向垂直；参照图4，胶枪31与XY平面的夹角为45°～60°，XY平面为X方向和Y方向组成的平面，X方向和Y方向相互垂直。处理系统22可根据拟合出的封边外轮廓的三维轨迹调整胶枪31在转角、圆弧等位置的方向，以满足上述的角度要求。
当涂胶完成后，将电芯B移入紫外光环境或热环境(依绝缘胶的类型而 定)，进行胶水固化；完全固化后进行折边。
在根据本发明的电芯封边处理工艺中，电芯B的封边在外轮廓露出金属，且涂覆的绝缘胶包覆金属。本发明的电芯封边处理工艺形成的胶层非常契合电芯B的封边的外轮廓，从而保证电芯B的封边外轮廓露出的金属被完全包覆，提高绝缘胶的涂覆质量，避免电芯B短路和金属的腐蚀。
其次说明根据本发明第二方面的电芯封边处理装置。
参照图1至图4，根据本发明的电芯封边处理装置包括：定位夹具1，以对待涂胶的电芯B进行定位；轨迹拟合机构2，采集电芯B的封边的外轮廓并拟合三维轨迹，其中电芯B的封边由上下两层包装膜密封连接而成；以及涂胶机构3，由轨迹拟合机构2控制并沿拟合的三维轨迹涂覆绝缘胶。
在根据本发明的电芯封边处理装置中，轨迹拟合机构2能够采集各种形状的电芯的封边的外轮廓并拟合三维轨迹，所以本发明的电芯封边处理装置具有更好的柔性和相容性，能够满足各种类型的电芯的涂胶要求，降低了涂胶工艺的开发难度和设备开发的成本，提高设备的稳定性；同时，由于涂胶机构3沿拟合的三维轨迹涂覆绝缘胶，所以形成的胶层非常契合电芯B的封边的外轮廓，从而保证电芯B的封边外轮廓被完全包覆，提高绝缘胶的涂覆质量，避免两层包装膜在封边外轮廓处裂开。
在根据本发明的电芯封边处理装置中，参照图2，定位夹具1可设置吸盘，以通过吸附固定电芯B。
在根据本发明的电芯封边处理装置中，参照图1，轨迹拟合机构2包括：CCD摄像头21，扫描电芯B的封边在XY平面上的外轮廓；处理系统22，与CCD摄像头21相连，并根据CCD摄像头21扫描的外轮廓拟合出封边外轮廓的二维轨迹。
在根据本发明的电芯封边处理装置中，参照图1，轨迹拟合机构2还包括：激光测距仪23，与处理系统22相连，测量封边外轮廓的二维轨迹在Z方向上的起伏变化，并由处理系统22与封边外轮廓的二维轨迹结合以拟合出封边外轮廓的三维轨迹。
在根据本发明的电芯封边处理装置中，对于经过封边热压且封边外轮廓在Z方向上恒定无变化的电芯B，由封边外轮廓的二维轨迹可以直接拟合出 封边外轮廓的三维轨迹。而对于未经过封边热压且封边外轮廓在Z方向上变化的电芯B，可通过激光测距仪23测量封边外轮廓的二维轨迹在Z方向上的起伏变化，然后再拟合出封边外轮廓的三维轨迹。
在根据本发明的电芯封边处理装置中，参照图1，涂胶机构3包括：胶枪31，内部收容绝缘胶水，且具有针头311；以及驱动机构32，与胶枪31相连并由轨迹拟合机构2控制，以带动胶枪31沿拟合的三维轨迹涂覆绝缘胶。
在根据本发明的电芯封边处理装置中，电芯B的封边在外轮廓露出金属，且涂胶机构3涂覆的绝缘胶包覆金属。涂胶机构3涂覆的胶层非常契合电芯B的封边的外轮廓，从而保证电芯B的封边外轮廓露出的金属被完全包覆，提高绝缘胶的涂覆质量，避免电芯B短路和金属的腐蚀。

Claims (14)

  1. 一种电芯封边处理工艺，其特征在于，
    首先，对待涂胶的电芯(B)进行定位；
    其次，采集电芯(B)的封边的外轮廓并拟合三维轨迹，其中电芯(B)的封边由上下两层包装膜密封连接而成；
    最后，沿拟合的三维轨迹涂覆绝缘胶。
  2. 根据权利要求1所述的电芯封边处理工艺，其特征在于，利用定位夹具(1)对电芯(B)进行定位。
  3. 根据权利要求1所述的电芯封边处理工艺，其特征在于，
    利用CCD摄像头扫描电芯(B)的封边在XY平面上的外轮廓，并传输到处理系统(22)以拟合出封边外轮廓的二维轨迹；
    利用激光测距仪(23)测量封边外轮廓的二维轨迹在Z方向上的起伏变化，进而拟合出封边外轮廓的三维轨迹；
    其中，XY平面为X方向和Y方向组成的平面，X方向、Y方向和Z方向相互垂直。
  4. 根据权利要求1所述的电芯封边处理工艺，其特征在于，
    在对待涂胶的电芯(B)进行定位前，对电芯(B)的封边进行热压，以使封边外轮廓在Z方向上恒定无变化；
    利用CCD摄像头扫描电芯(B)的封边在XY平面上的外轮廓，并传输到处理系统(22)以拟合出封边外轮廓的二维轨迹，由于封边外轮廓在Z方向上恒定，进而可直接拟合出封边外轮廓的三维轨迹；
    其中，XY平面为X方向和Y方向组成的平面，X方向、Y方向和Z方向相互垂直。
  5. 根据权利要求1所述的电芯封边处理工艺，其特征在于，涂覆的绝缘胶为热固化胶、光引发固化胶或热熔胶。
  6. 根据权利要求1所述的电芯封边处理工艺，其特征在于，绝缘胶的粘度为5000cP～1000000cP。
  7. 根据权利要求1所述的电芯封边处理工艺，其特征在于，
    利用胶枪(31)对电芯(B)的封边外轮廓涂覆绝缘胶；
    通过调整胶枪(31)上针头(311)的直径和长度来调整绝缘胶的流量和流速。
  8. 根据权利要求7所述的电芯封边处理工艺，其特征在于，
    胶枪(31)与涂胶位置的行进方向垂直；
    胶枪(31)与XY平面的夹角为45°～60°，XY平面为X方向和Y方向组成的平面，X方向和Y方向相互垂直。
  9. 根据权利要求1所述的电芯封边处理工艺，其特征在于，电芯(B)的封边在外轮廓露出金属，且涂覆的绝缘胶包覆金属。
  10. 一种电芯封边处理装置，其特征在于，包括：
    定位夹具(1)，以对待涂胶的电芯(B)进行定位；
    轨迹拟合机构(2)，采集电芯(B)的封边的外轮廓并拟合三维轨迹，其中电芯(B)的封边由上下两层包装膜密封连接而成；以及
    涂胶机构(3)，由轨迹拟合机构(2)控制并沿拟合的三维轨迹涂覆绝缘胶。
  11. 根据权利要求10所述的电芯封边处理装置，其特征在于，轨迹拟合机构(2)包括：
    CCD摄像头(21)，扫描电芯(B)的封边在XY平面上的外轮廓；
    处理系统(22)，与CCD摄像头(21)相连，并根据CCD摄像头(21)扫描的外轮廓拟合出封边外轮廓的二维轨迹。
  12. 根据权利要求11所述的电芯封边处理装置，其特征在于，轨迹拟合 机构(2)还包括：
    激光测距仪(23)，与处理系统(22)相连，测量封边外轮廓的二维轨迹在Z方向上的起伏变化，并由处理系统(22)与封边外轮廓的二维轨迹结合以拟合出封边外轮廓的三维轨迹。
  13. 根据权利要求10所述的电芯封边处理装置，其特征在于，涂胶机构(3)包括：
    胶枪(31)，内部收容绝缘胶水，且具有针头(311)；以及
    驱动机构(32)，与胶枪(31)相连并由轨迹拟合机构(2)控制，以带动胶枪(31)沿拟合的三维轨迹涂覆绝缘胶。
  14. 根据权利要求10所述的电芯封边处理装置，其特征在于，电芯(B)的封边在外轮廓露出金属，且涂胶机构(3)涂覆的绝缘胶包覆金属。
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CN203674276U (zh) * 2014-01-20 2014-06-25 东莞新能源科技有限公司 软包装锂离子电池
CN204558606U (zh) * 2015-04-20 2015-08-12 厦门宝龙工业股份有限公司 超薄型聚合物锂离子电池的一体化侧封工装
CN105826612A (zh) * 2016-04-19 2016-08-03 宁德新能源科技有限公司 一种二次锂电池的封边方法

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CN203674276U (zh) * 2014-01-20 2014-06-25 东莞新能源科技有限公司 软包装锂离子电池
CN204558606U (zh) * 2015-04-20 2015-08-12 厦门宝龙工业股份有限公司 超薄型聚合物锂离子电池的一体化侧封工装
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