WO2020177351A1 - 一种电芯钩取下料方法及与其相适配的下料机构 - Google Patents

一种电芯钩取下料方法及与其相适配的下料机构 Download PDF

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Publication number
WO2020177351A1
WO2020177351A1 PCT/CN2019/114293 CN2019114293W WO2020177351A1 WO 2020177351 A1 WO2020177351 A1 WO 2020177351A1 CN 2019114293 W CN2019114293 W CN 2019114293W WO 2020177351 A1 WO2020177351 A1 WO 2020177351A1
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Prior art keywords
battery
hook
winding needle
cell
battery core
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PCT/CN2019/114293
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English (en)
French (fr)
Inventor
文二龙
邱毅
万志永
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苏州杰锐思智能科技股份有限公司
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Priority claimed from CN201910163720.2A external-priority patent/CN109818084B/zh
Priority claimed from CN201910169741.5A external-priority patent/CN109860729B/zh
Priority claimed from CN201920283995.5U external-priority patent/CN209981408U/zh
Priority claimed from CN201920284056.2U external-priority patent/CN209981397U/zh
Application filed by 苏州杰锐思智能科技股份有限公司 filed Critical 苏州杰锐思智能科技股份有限公司
Publication of WO2020177351A1 publication Critical patent/WO2020177351A1/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
    • H01M10/04—Construction or manufacture in general
    • 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to the technical field of lithium battery winding equipment, in particular to a method for removing a material from a battery hook and a matching mechanism.
  • the structure is more complicated, the control of the execution action is more difficult, and it is necessary to clamp the driving device for cells with different winding turns. Make corresponding structural adjustments.
  • it is difficult to accurately control the force acting on the battery cell in the actual application process and the inner diaphragm of the battery cell is often taken out or the inner diaphragm of the battery cell is pressure-loss. Therefore, it is urgent for technicians to solve the above problems.
  • a technical problem to be solved by the present invention is to provide a battery cell blanking method with simple action process, wide application range and high blanking reliability.
  • Another technical problem to be solved by the present invention is to provide a blanking mechanism compatible with the above-mentioned battery blanking method.
  • the present invention relates to a method for removing material from a battery hook, which is specifically as follows: at least two reclaiming members pass through the battery along the length of the winding needle, and then the reclaiming member follows the diameter of the winding needle.
  • the battery is expanded to expand the battery core, and the action of picking up the battery core is completed by the combined action of the leaning force exerted on the end of the battery core by the retrieving member and the friction force of the retrieving member on the inner wall of the battery.
  • the action of picking up the battery cell is completed by means of the pressing force applied by the picking member to the end of the battery cell or the friction force of the picking member acting on the inner wall of the battery core.
  • the reclaimer used for unloading the battery includes a front extension arm and a hook portion provided at the free end of the extension arm.
  • the outer wall of the winding needle is provided with an insertion slot for the extension arm to enter.
  • the reclaiming process of the battery cell includes the following steps:
  • the position of the reclaimer corresponds to the insertion slot, and enters the cell along the length of the winding needle until the hook part crosses the end surface of the cell;
  • the reclaimer expands backwards along the radial direction of the winding needle until the extension arm is pressed against the inner wall of the battery;
  • the present invention also discloses a battery cell unloading mechanism, which includes at least two reclaimers adapted to the above-mentioned battery hook unloading method and used to drive the foregoing reclaimers to perform actions to complete the battery unloading process Power plant.
  • the material taking part includes an extension arm and a hook part arranged at the free end of the extension arm.
  • the height of the protrusion of the hooking portion is not less than 1 mm.
  • the hook part and the extension arm are detachably connected.
  • a bolt hole for the bolt to pass through is opened on the hooking part, and correspondingly, a threaded hole matching the bolt is opened on the extension arm.
  • the threaded holes are arranged in multiple groups and distributed along the length direction of the extension arm.
  • the power device includes a first driving part that drives the retrieving member to move toward or back along the radial direction of the winding needle, and driving the retrieving member to advance or retreat by driving the first driving portion.
  • the second drive unit drives the retrieving member to move toward or back along the radial direction of the winding needle, and driving the retrieving member to advance or retreat by driving the first driving portion.
  • the second driving part includes a motor, a connecting block fixed to the first driving part, and a lead screw that drives the connecting block to reciprocate and uses the motor as a power source.
  • the material taking parts are arranged in multiple, evenly distributed around the outer wall of the winding needle.
  • the reclaimer and the inner wall of the battery are always in a compressed state, which effectively prevents the inner diaphragm of the battery from being brought out, crumpled, etc.
  • the occurrence of this phenomenon ensures the molding quality of the battery core.
  • the action process is very concise.
  • the structural design of the unloading mechanism adapted to the above method is very simple, which facilitates action control, and is beneficial to the overall structural design and layout of the battery winding equipment.
  • Fig. 1 is a schematic structural diagram of a battery core unloading mechanism adapted to the method for removing and unloading a battery cell hook in the present invention.
  • Fig. 2 is a schematic structural diagram of a first embodiment of a winding needle adapted to the method for removing the material from the battery core hook in the present invention.
  • Fig. 3 is a schematic structural diagram of a second embodiment of a winding needle adapted to the method for removing the material from the battery core hook in the present invention.
  • Fig. 4 is a schematic structural diagram of a third embodiment of a winding needle adapted to the method for removing the material from the battery core hook in the present invention.
  • Fig. 5 is a flow chart of the steps of the first embodiment of the method for removing material from the battery hook in the present invention.
  • Fig. 6 is a schematic view of the action of the blanking mechanism adapted to the first embodiment of the method for removing and blanking from the battery hook in the present invention.
  • Fig. 7 is a partial enlarged view of I in Fig. 6.
  • Fig. 8 is a partial enlarged view of II in Fig. 6.
  • Fig. 9 is a partial enlarged view of III in Fig. 6.
  • Fig. 10 is a flow chart of the steps of the second embodiment of the method for removing material from the battery hook in the present invention.
  • the friction between the reclaiming member and the inner wall of the battery may be ignored, and the The extension arm surface can be very smooth.
  • the hook portion 12 at the front end of the extension arm 11 may not be provided, so that only the surface of the extension arm and the interior of the battery are The friction force is sufficient to achieve the purpose of removing the battery core, of course, provided that the battery core is not damaged.
  • the outer wall of the winding needle 3 is provided with an insertion slot 33 (as shown in Figures 2 and 3) for the reclaimer 1 to traverse freely and completely penetrate along its own length direction.
  • the winding needle 3 may not be provided with the insertion slot 33, but the reclaimer 1 can pass through the gap formed between the two split winding needles 3 (that is, the diaphragm penetration seam) to complete the battery blanking process (as shown in the figure) 4), the cross section of the first winding needle split body 31 and the second winding needle split body 32 in Figure 4 is slightly smaller than half of the cross section of the winding needle 3.
  • the first winding needle split A gap is formed between the body 31 and the second winding needle sub-body 32, and the extension arm 11 and the hook portion 12 of the reclaimer 1 can extend into the winding needle 1 and the battery core 4 from this gap, and the same extension part 11 It can expand back along the radial direction of the winding needle 3 to open the battery core, and then use the friction force of the picking member 1 to act on the inner wall of the battery core and the pressing force of the end of the battery core to complete the action of taking the battery core. .
  • the action of picking up the battery is completed by means of the pressing force applied to the end of the battery core by the retrieving member 1 or the friction force of the retrieving member acting on the inner wall of the battery.
  • the present invention discloses a battery core blanking method with completely different action processes.
  • the action principle is as follows: at least two reclaiming members 1 pass through the interior of the battery core along the length of the winding needle 3, and then The take-out member 1 expands backwards along the radial direction of the winding needle 3 to open the battery core, and then uses the friction force of the take-out member 1 to act on the inner wall of the battery core and the end of the battery to complete the take-up. Core action. Or, the action of picking up the battery is completed by means of the pressing force applied to the end of the cell by the retrieving member 1 or the friction force of the retrieving member on the inner wall of the battery.
  • Fig. 5 shows the step flow chart of the first embodiment of the method for removing the material from the battery cell hook in the present invention
  • Fig. 6 is the illustrated process, which is specifically as follows:
  • the position of the reclaimer 1 corresponds to the insertion slot 33, and the extension arm 11 enters the battery core 4 along the length direction of the winding needle 3 until the hook portion 12 crosses the end surface of the battery core 4; as shown in FIG.
  • the reclaimer 1 expands backwards along the radial direction of the winding needle 3 until the extension arm 11 is pressed against the inner wall of the battery 4; as shown in FIG. 8.
  • the winding needle 3 corresponding to the above-mentioned embodiment is shown in Figures 2 and 3.
  • the winding needle 3 is composed of two winding needle parts (the first winding needle part 31 and the second winding needle part 32).
  • the cross section of the needle 3 is cylindrical or elliptical cylindrical, or other shapes, and the cross sections of the first winding needle split body 31 and the second winding needle split body 32 together form the cross section of the winding needle 1.
  • the outer surfaces of the split body 31 and the second winding needle split body 32 are each processed with one insertion slot 33, generally speaking, the two insertion slots 33 are symmetrically arranged).
  • the cross section of the first winding needle 31 and the second winding needle 32 is slightly smaller than half of the cross section of the winding needle 1.
  • the first winding needle There may be a certain gap between the split body 31 and the second winding needle split body 32.
  • the cross section of a part of the first winding needle split body 31 and the second winding needle split body 32 is slightly smaller than half of the cross section of the winding needle 1, and the cross section of the other part is equal to half of the cross section of the winding needle 1. Therefore, there is a gap in one section of the winding needle 1 and no gap in one section.
  • Fig. 10 shows a flow chart of the second embodiment of the method for removing the material from the battery cell hook in the present invention, which is specifically as follows:
  • the position of the reclaimer 1 corresponds to the penetrating seam of the diaphragm of the winding needle 3 itself, and enters the cell along the length of the winding needle 3 until the hook part 12 passes the end surface of the cell;
  • the reclaimer 1 expands backwards along the radial direction of the winding needle 3 until the extension arm 11 is pressed against the inner wall of the battery;
  • the winding needle 3 moves back as a whole, and at the same time, the action of taking out the battery is completed by the combined action of the friction force acting on the inner wall of the cell by the extension arm 11 and the contact force acting on the end of the cell by the hooking part 12 .
  • the extension arm 11 and the inner wall of the battery cell are always in a compressed state, thereby effectively avoiding the occurrence of the diaphragm being brought out, crumpled, etc., thereby ensuring The molding quality of the battery core.
  • the hooking part 12 to the battery should be adjusted before the battery is officially blanked.
  • the distance between the rear end of the core is controlled, generally 0.2 ⁇ 0.5mm is appropriate.
  • the overall rigidity of the reclaimer 1 is very important for the implementation of the above-mentioned battery cell blanking method.
  • a tungsten steel (hard alloy) material that can be used has a thickness of 2-5 mm and a width of 5-15 mm.
  • other materials that can achieve similar rigidity conditions can also be used.
  • the tensioning force needs to be strictly controlled when the extension arm 11 is against the inner wall of the battery cell.
  • the tensioning force is controlled by the first driving part 21, and the first driving part 21 can generally be an air cylinder or a torque motor. If a cylinder is used, the cylinder can also be equipped with a precision pressure regulating valve to precisely control the output force of the cylinder.
  • the magnitude of the tension is controlled by controlling the thrust of the cylinder or the torque of the torque control motor, which drives the cell to expand from the surface of the winding needle 3 until the cell is tensioned.
  • the tension force of the extension arm 11 can be manually set, and it is generally set to make the inner ring of the battery cell completely tensioned and straight without damaging the battery cell.
  • the present invention also discloses a battery blanking mechanism (as shown in FIG. 1), which includes the above-mentioned reclaimer 1 and is used to drive the reclaimer 1 to perform actions to complete Power unit 2 for the process of battery core cutting.
  • the above-mentioned power device 2 includes a first driving part 21 that drives the reclaimer 1 to move toward or backward along the radial direction of the winding needle 3, and drives the reclaimer 1 to advance by driving the first driving part 21 accordingly. Or the second drive unit 22 that moves backward.
  • the height of the hook provided on the reclaimer 1 should not be less than 1 mm.
  • Figure 6, Figure 7, Figure 8, and Figure 9 show the action diagram and partial enlarged view of the blanking mechanism adapted to the first embodiment of the battery blanking method in the present invention, wherein Figure 7 corresponds to the step a; Figure 8 corresponds to step b; Figure 9 corresponds to step c.
  • the specific structure and operation principle of the unloading mechanism adapted to the second embodiment of the battery hook unloading method are similar to the above-mentioned action process.
  • the only difference lies in the spatial position and setting form of the feeding and unloading piece 1 The difference is not repeated here.
  • the second driving portion 22 can be configured as follows: it is composed of a motor, a connecting block, and It is composed of several parts such as a lead screw which is arranged between the two to transmit power.
  • the connecting block 212 is detachably fixed on the first driving part 21.
  • the above-mentioned first driving part 21 is preferably an air cylinder or a torque motor, so that it is convenient to control the adhesion force of the extension arm 11 of each reclaimer 1 to the inner wall of the cell within a reasonable range.
  • an elastic cushion may also be provided on the hooking portion 12 facing the rear end surface of the battery core (Not shown in the figure), the material is preferably elastic rubber to ensure the molding quality of the battery core.
  • the hook part 12 and the extension arm 11 can be designed as a detachable connection, as follows: the hook part 12 is provided with bolt holes for bolts to pass through Correspondingly, the extension arm 11 is provided with threaded holes adapted to the above-mentioned bolts. The threaded holes are arranged in multiple groups and distributed along the length direction of the extension arm 11.
  • the reclaiming piece 1 can be set as multiple pieces (more than two pieces), and it runs along the battery core during the actual blanking process.
  • the inner wall is evenly distributed circumferentially.

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Abstract

本发明涉及了一种电芯钩取下料方法及与其相适配的下料机构，具体如下：至少两件取料件沿着卷针的长度方向穿越电芯，而后取料件沿着卷针的径向进行扩张以撑开电芯，进而借助取料件施加于电芯端部的顶靠力和取料件作用于电芯内壁的摩擦力的共同作用来完成托取电芯的动作。相较于传统做法，在执行本发明所公开的下料方案过程中，取料件与电芯的内壁始终处于压紧状态，有效地避免了电芯的内层隔膜被带出、揉皱等现象的发生，从而确保了电芯的成型质量。再者，动作过程十分简洁。另外，与上述方法相适配的下料机构结构设计十分简单，便于进行动作控制，且有利于电芯卷绕设备的整体结构设计与布局。

Description

一种电芯钩取下料方法及与其相适配的下料机构 技术领域
本发明涉及锂电池卷绕设备技术领域，尤其是一种电芯钩取下料方法及与其相适配的下料机构。
背景技术
在电芯制造卷芯工艺中，通过卷绕设备完成电芯卷制过程后，需要对电芯进行下料操作，然而在卷针抽取过程中，电芯内圈的隔膜容易被带出、揉皱甚至撕裂进而造成电芯质量不合格。中国发明专利CN207637910U公开了一种电芯下料装置及卷绕设备，其包括夹持装置、夹持驱动装置，在实际工作过程中，夹持驱动装置驱动夹持装置夹住卷针上的卷绕完成的电芯内外壁，卷针抽出后完成电芯的下料操作。上述方案虽较好地解决了上述存在的问题，然而其亦存在一些缺点，例如：结构较为复杂，执行动作的控制较为困难，且针对于不同卷层圈数的电芯须对夹持驱动装置进行相应地结构调整，另外，在具体实际应用过程中作用于电芯的作用力难以做到精准控制，时常会出现电芯的内层隔膜被带出或电芯的内层隔膜压损现象。因而，亟待技术人员解决上述问题。
发明内容
本发明要解决的一个技术问题是提供一种动作过程简洁、适用范围广且下料可靠性高的电芯下料方法。
本发明要解决的另一个技术问题是提供一种与上述电芯下料方法相适配的下料机构。
为了解决上述技术问题，本发明涉及了一种电芯钩取下料方法，具体如下：至少两件取料件沿着卷针的长度方向穿越电芯，而后取料件沿着卷针的径向进行扩张以撑开电芯，进而借助取料件施加于电芯端部的顶靠力和取料件作用于电芯内壁的摩擦力的共同作用来完成托取电芯的动作。或，借助所述取料件施加于所述电芯端部的顶靠力或所述取料件 作用于所述电芯内壁的摩擦力完成托取电芯的动作。
作为实现上述电芯钩取下料方法的一种方案，用于电芯下料的取料件包括前置的延伸臂以及设置于延伸臂自由端的钩挂部。在卷针的外壁开设有供所述延伸臂进入的插入槽。电芯的取料过程包括以下步骤：
a、取料件的位置对应于插入槽，沿着卷针的长度方向进入电芯，直至钩挂部越过电芯的端面；
b、取料件沿着卷针的径向进行向背扩张运动，直至延伸臂与电芯的内壁相压紧；
c、卷针整体后移，与此同时，借助延伸臂作用于电芯内壁的摩擦力和钩挂部作用于电芯端部的顶靠力的共同作用完成托取电芯的动作。
本发明还公开了一种电芯下料机构，包括与上述电芯钩取下料方法相适配的至少两件取料件以及用来驱动上述取料件进行动作以完成电芯下料过程的动力装置。取料件包括延伸臂以及设置于该延伸臂自由端的钩挂部。
进一步的，钩挂部的凸起高度不小于1mm。
更进一步的，钩挂部与延伸臂以可拆卸方式进行联接。
更进一步的，在钩挂部上开设有用来供螺栓穿过的螺栓孔，相应地，在延伸臂开设有与螺栓相适配的螺纹孔。螺纹孔设置为多组，沿延伸臂的长度方向进行分布。
进一步的，动力装置包括驱动取料件沿着卷针的径向作相向或向背运动的第一驱动部以及通过驱动上述第一驱动部、从而相应地带动取料件进行前伸或后退动作的第二驱动部。
更进一步的，第二驱动部包括电机、固定于第一驱动部的连接块以及驱动连接块进行往复运动、由电机作为动力源的丝杠。
更进一步的，取料件设置为多个，围绕卷针的外壁均匀分布。
相较于传统做法，在执行本发明所公开的下料方案过程中，取料件与电芯的内壁始终处于压紧状态，有效地避免了电芯的内层隔膜被带出、揉皱等现象的发生，从而确保了电芯的成型质量。再者，动作过程十分简洁。另外，与上述方法相适配的下料机构结构设计十分简单，便于进 行动作控制，且有利于电芯卷绕设备的整体结构设计与布局。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是与本发明中电芯钩取下料方法相适配的电芯下料机构的结构示意图。
图2是与本发明中电芯钩取下料方法相适配的卷针第一种实施方式的结构示意图。
图3是与本发明中电芯钩取下料方法相适配的卷针第二种实施方式的结构示意图。
图4是与本发明中电芯钩取下料方法相适配的卷针第三种实施方式的结构示意图。
图5是本发明中电芯钩取下料方法第一种实施方式的步骤流程图。
图6是本发明中与上述电芯钩取下料方法第一种实施方式相适配下料机构的动作示意图。
图7是图6的I局部放大图。
图8是图6的II局部放大图。
图9是图6的III局部放大图。
图10是本发明中电芯钩取下料方法第二种实施方式的步骤流程图。
1-取料件；11-延伸臂；12-钩挂部；2-动力装置；21-第一驱动部；22-第二驱动部。
具体实施方式
在对本发明所公开电芯下料方法的具体实施方式进行正式阐述前，首先对与该下料方法相适配的取料件以及卷针3作个简要说明，具体如 下：针对于取料件1而言，当需要依靠取料件施加于电芯端部的顶靠力(由钩挂部12钩挂电芯端部提供)和取料件作用于电芯内壁的摩擦力(由延伸臂11与电芯内壁的摩擦力提供)的共同作用来完成托取电芯的动作时，其包括延伸臂11以及设置于该延伸臂11前端、用于顶靠电芯端面的钩挂部12(如图1中所示)。当只依靠所述取料件施加于所述电芯端部的顶靠力完成托取电芯的动作时，可以不考虑取料件与所述电芯内壁的摩擦力，取料件1的延伸臂表面可以很光滑。当只依靠所述取料件作用于所述电芯内壁的摩擦力完成托取电芯的动作时，则延伸臂11前端的钩挂部12可以不设置，仅使得延伸臂表面与电芯内部的摩擦力达到取出电芯的目的即可，当然，前提是不损伤电芯。针对于卷针3而言，在卷针3的外壁上开设有以供上述取料件1自由穿越、沿其自身长度方向完全贯穿的插入槽33(如图2、3中所示)，当然，卷针3也可以不开设插入槽33，而是使得取料件1穿越两分体卷针3之间形成的间隙(即隔膜穿入缝)从而来以完成电芯下料工序(如图4中所示)，图4中的第一卷针分体31和第二卷针分体32的横截面略小于卷针3的横截面的一半，在构成卷针时，第一卷针分体31和第二卷针分体32之间形成一个间隙，取料件1的延伸臂11及钩挂部12可以从这个间隙中伸入到卷针1内部以及电芯4内部，同样延伸部11可以沿着卷针3的径向进行向背扩张运动以撑开电芯，进而借助取料件1作用于电芯内壁的摩擦力和电芯端部的顶靠力完成托取电芯的动作。或，借助所述取料件1施加于所述电芯端部的顶靠力或所述取料件作用于所述电芯内壁的摩擦力完成托取电芯的动作。
相较于传统做法，本发明公开了一种动作过程完全相异的电芯下料方法，动作原理如下：至少两件取料件1沿着卷针3的长度方向穿越电芯的内部，而后该取料件1沿着卷针3的径向进行向背扩张运动以撑开电芯，进而借助取料件1作用于电芯内壁的摩擦力和电芯端部的顶靠力完成托取电芯的动作。或，借助所述取料件1施加于所述电芯端部的顶 靠力或所述取料件作用于所述电芯内壁的摩擦力完成托取电芯的动作。
图5示出了本发明中电芯钩取下料方法第一种实施方式的步骤流程图，图6为图示的过程，具体如下：
a、取料件1的位置对应于插入槽33，延伸臂11沿着卷针3的长度方向进入电芯4，直至钩挂部12越过电芯4的端面；如图7所示。
b、取料件1沿着卷针3的径向进行向背扩张运动，直至延伸臂11与电芯4的内壁相压紧；如图8所示。
c、卷针3整体后移，与此同时，借助延伸臂11作用于电芯内壁的摩擦力和钩挂部12作用于电芯4端部的顶靠力的共同作用完成托取电芯的动作。如图9所示。
注：与上述实施方式相对应的卷针3如图2、3中所示，卷针3由两个卷针分体(第一卷针分体31和第二卷针分体32组成，卷针3的横截面为圆柱形或椭圆柱形，或其它形状，第一卷针分体31和第二卷针分体32的横截面合在一起构成卷针1的横截面。第一卷针分体31和第二卷针分体32的外表面各加工有一条插入槽33，一般而言，两条插入槽33对称设置)。其中，图2所示的示例中，第一卷针分体31和第二卷针分体32的横截面略小于卷针1的横截面的一半，在设置卷针1时，第一卷针分体31和第二卷针分体32之间可以存在一定的间隙。图3中，第一卷针分体31和第二卷针分体32的一部分的横截面略小于卷针1的横截面的一半，而另一部分的横截面等于卷针1横截面的一半，因此，构成的卷针1一段存在间隙，一段没有间隙。
图10示出了本发明中电芯钩取下料方法第二种实施方式的步骤流程图，具体如下：
a、取料件1的位置对应于卷针3自身的隔膜穿入缝，沿着卷针3的长度方向进入电芯，直至钩挂部12越过电芯的端面；
b、取料件1沿着卷针3的径向进行向背扩张运动，直至延伸臂11与电芯的内壁相压紧；
c、卷针3整体后移，与此同时，借助延伸臂11作用于电芯内壁的摩擦力和钩挂部12作用于电芯端部的顶靠力的共同作用完成托取电芯的 动作。
注：与上述实施方式相对应的卷针3如图4中所示。
在上述两种电芯钩取下料的两种实施例中，延伸臂11与电芯的内壁始终处于压紧状态，从而有效地避免了隔膜被带出、揉皱等现象的发生，进而确保了电芯的成型质量。
再者，为了防止在下料过程中电芯的内层隔膜被带出以及揉皱现象，作为上述两种实施方式的进一步优化，在对电芯进行正式下料前需对钩挂部12至电芯后端面的距离进行控制，一般以0.2～0.5mm为宜。当然，也可以在上述两种实施方式的步骤a后即对取料件1沿前后方向进行微调，使得钩挂部12至电芯后端面的距离满足上述要求。
需要注意的是，取料件1的整体刚性对执行上述电芯下料方法至关重要。为保证取料件1的钢性，例如可采用的钨钢(硬质合金)材料，其厚度一般以2～5mm为宜，宽度5～15mm为宜。当然也可以采用其他可以达到相似刚性条件的材质。
另外，在延伸臂11与电芯内壁顶靠的过程中需要严格控制张紧力的大小。张紧力由第一驱动部21来控制，第一驱动部21一般可以采用是气缸或扭矩电机。如果采用气缸，气缸还可以安装有精密调压阀，以精确控制气缸的输出力。在延伸臂11的外扩张紧过程中，通过控制气缸的推力或扭矩控电机的扭力来控制张紧力的大小，带动电芯从卷针3表面向外扩张，直至电芯张紧。延伸臂11的外扩的张紧力大小可以人工设置，一般设置为使电芯内圈完全张紧绷直，且不损伤电芯为宜。
为了适配上述下料方法，本发明还公开了一种电芯下料机构(如图1中所示)，其包括上述的取料件1以及用来驱动该取料件1进行动作以完成电芯下料过程的动力装置2。上述动力装置2包括驱动取料件1沿着卷针3的径向作相向或向背运动的第一驱动部21以及通过驱动上述第一驱动部21、从而相应地带动取料件1进行前伸或后退动作的第二驱动部22。为了取得良好的电芯下料效果，设置于取料件1上的钩挂的凸起高度不宜小于1mm。
图6、图7、图8以及图9示出了本发明中与电芯下料方法中第一种 实施方式相适配下料机构的动作示意图以及局部放大图，其中，图7对应于步骤a；图8对应于步骤b；图9对应于步骤c。
与电芯钩取下料方法第二种实施方式相适配的下料机构的具体结构以及动作原理与上述的动作过程相雷同，区别点仅在于供取料件1穿越的空间位置及设置形式的不同在此不再赘述。
再者，为了使得钩挂部12靠近电芯后端面的运动过程更加稳定，且使得两者之间的间隙控制更加精准，上述第二驱动部22可以作如下设置：其由电机、连接块以及设置于两者之间、用来传递动力的丝杠等几部分构成，其中，连接块212可拆卸地固定于第一驱动部21上。
上述第一驱动部21优选气缸或扭矩电机，从而可以便于将各取料件1的延伸臂11作用于电芯内壁的贴合力控制在合理范围内。
再者，为了防止卷针3在回退的过程中，钩挂部12对电芯的端面造成冲击，还可以在在钩挂部12上、正对于电芯的后端面设置有弹性缓冲垫(图中未示出)，材质优选弹性橡胶，从而确保电芯的成型质量。
再者，为了扩大取料件1的适用范围，钩挂部12与延伸臂11之间可以设计为可拆卸联接方式，具体如下：在钩挂部12上开设有用来供螺栓穿过的螺栓孔，相应地，在延伸臂11开设有与上述螺栓相适配的螺纹孔。螺纹孔设置为多组，沿延伸臂11的长度方向进行分布。
最后，为了使得电芯在托取的过程中受力平衡，便于下料进程的顺利进行，取料件1可以设置为多件(两件以上)，在实际下料过程中其沿着电芯的内壁周向均布。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其他实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是需要符合与本文所公开的原理和新颖特点相一致的最宽范围。

Claims (9)

  1. 一种电芯钩取下料方法，其特征在于，至少两件取料件沿着卷针的长度方向穿越电芯，而后所述取料件沿着所述卷针的径向进行扩张以撑开所述电芯，
    借助所述取料件施加于所述电芯端部的顶靠力和所述取料件作用于所述电芯内壁的摩擦力的共同作用来完成托取电芯的动作；
    或，借助所述取料件施加于所述电芯端部的顶靠力或所述取料件作用于所述电芯内壁的摩擦力完成托取电芯的动作。
  2. 根据权利要求1所述的电芯钩取下料方法，其特征在于，用于电芯下料的所述取料件包括前置的延伸臂以及设置于所述延伸臂自由端的钩挂部；在所述卷针的外壁开设有供所述延伸臂进入的插入槽；所述电芯的取料过程包括以下步骤：
    a、所述取料件的位置对应于所述插入槽，沿着卷针的长度方向进入电芯，直至所述钩挂部越过电芯的端面；
    b、所述取料件沿着卷针的径向进行向背扩张运动，直至所述延伸臂与电芯的内壁相压紧；
    c、卷针整体后移，与此同时，借助所述延伸臂作用于电芯内壁的摩擦力和所述钩挂部作用于电芯端部的顶靠力的共同作用完成托取电芯的动作。
  3. 一种电芯钩取下料机构，其特征在于，包括至少两件取料件以及用来驱动所述取料件进行动作以完成电芯下料过程的动力装置；所述取料件包括延伸臂以及设置于所述延伸臂自由端的钩挂部。
  4. 根据权利要求3所述的电芯钩取下料机构，其特征在于，所述钩挂部的凸起高度不小于1mm。
  5. 根据权利要求3所述的电芯钩取下料机构，其特征在于，所述钩挂部与所述延伸臂以可拆卸方式进行联接。
  6. 根据权利要求5所述的电芯钩取下料机构，其特征在于，在所述钩挂部上开设有用来供螺栓穿过的螺栓孔，相应地，在所述延伸臂开设有与所述螺栓相适配的螺纹孔；所述螺纹孔设置为多组，沿所述延伸臂 的长度方向进行分布。
  7. 根据权利要求6所述的电芯钩取下料机构，其特征在于，所述动力装置包括驱动所述取料件沿着所述卷针的径向作相向或向背运动的第一驱动部以及通过驱动所述第一驱动部、从而相应地带动所述取料件进行前伸或后退动作的第二驱动部。
  8. 根据权利要求7所述的电芯钩取下料机构，其特征在于，所述第二驱动部包括电机、固定于所述第一驱动部的连接块以及驱动所述连接块进行往复运动、由所述电机作为动力源的丝杠。
  9. 根据权利要求4-8中任一项所述的电芯钩取下料机构，其特征在于，所述取料件设置为多个，围绕所述卷针的外壁均匀分布。
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CN109818084A (zh) * 2019-03-06 2019-05-28 苏州杰锐思自动化设备有限公司 一种电芯下料方法及与其相适配的下料机构
CN109860729A (zh) * 2019-03-06 2019-06-07 苏州杰锐思自动化设备有限公司 一种电芯钩取下料方法及与其相适配的下料机构

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