CN111761364B - Die-cutting and welding equipment for intermittent coating type pole piece and die-cutting and welding method - Google Patents
Die-cutting and welding equipment for intermittent coating type pole piece and die-cutting and welding methodDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及锂离子电池生产设备技术领域，具体涉及一种间歇涂布式极片用模切焊接设备以及模切焊接方法。The invention relates to the technical field of lithium ion battery production equipment, in particular to a die-cutting and welding equipment for intermittent coating type pole pieces and a die-cutting and welding method.
背景技术Background technique
在锂离子电池的生产过程中，极片在辊压过程中由于极耳区和料区的延展不同，往往会导致极耳边缘褶皱，对于纯箔材的影响可能是极耳边缘的褶皱，但是对于一些复合集流体而言，可能会导致极耳边缘的开裂，从而导致内阻过高，甚至不能使用。因此，一般通过采用间歇涂布的方法来解决连续涂布和辊压的问题。但在间歇涂布过程，由于极耳在活性物质中间，而且复合集流体由于本身焊接上的特殊性，需要进行二次焊接所以需要外留极耳，但外留极耳给裁切带来了困难。In the production process of lithium-ion batteries, the pole piece often causes wrinkles at the edge of the tab due to the different extension of the tab area and the material area during the rolling process. For some composite current collectors, the edge of the tab may be cracked, resulting in too high internal resistance and even unusable. Therefore, the problems of continuous coating and rolling are generally solved by adopting the method of intermittent coating. However, in the intermittent coating process, since the tab is in the middle of the active material, and the composite current collector needs to be welded a second time due to its particularity in welding, it is necessary to leave the outer tab, but the outer tab brings cutting. difficulty.
发明内容SUMMARY OF THE INVENTION
为了解决背景技术存在的技术问题，本发明提出的一种间歇涂布式极片用模切焊接设备以及模切焊接方法。In order to solve the technical problems existing in the background art, the present invention proposes a die-cutting and welding equipment and a die-cutting and welding method for intermittently coated pole pieces.
本发明提出的一种间歇涂布式极片用模切焊接设备，包括：极片基材放卷机构、极耳模切机构、焊接机构、分切机构、收集机构和箔材移送机构；The intermittent coating type pole piece die-cutting and welding equipment proposed by the present invention includes: a pole piece base material unwinding mechanism, a pole lug die-cutting mechanism, a welding mechanism, a slitting mechanism, a collection mechanism and a foil material transfer mechanism;
极片基材放卷机构的下游依次设有极耳模切机构、焊接机构、分切机构和收集机构，箔材移送机构用于将金属箔材段传送到焊接机构，焊接机构用于将金属箔材段和模切出的极耳焊接形成外接极耳；The pole piece base material unwinding mechanism is provided with a pole ear die-cutting mechanism, a welding mechanism, a slitting mechanism and a collecting mechanism in sequence. The foil transfer mechanism is used to transfer the metal foil segment to the welding mechanism, and the welding mechanism is used to Foil segments and die-cut tabs are welded to form external tabs;
分切机构包括极片基材固定装置、牵引固定装置、外接极耳翻折装置和裁切装置，极片基材固定装置、外接极耳翻折装置、牵引固定装置依次设置在焊接机构下游，裁切装置设置在外接极耳翻折装置一侧，裁切装置用于将完成外接极耳翻折的极片基材裁切成单片极片。The slitting mechanism includes a pole piece base material fixing device, a traction fixing device, an external electrode tab folding device and a cutting device. The cutting device is arranged on one side of the external tab folding device, and the cutting device is used to cut the pole piece base material after the external tab folding is completed into single pole pieces.
优选地，还包括外接极耳夹紧固定装置，外接极耳夹紧固定装置设置在外接极耳翻折装置一侧，外接极耳夹紧固定装置用于固定翻折后的外接极耳。Preferably, an external tab clamping and fixing device is further included, the external tab clamping and fixing device is disposed on one side of the external tab folding device, and the external tab clamping and fixing device is used to fix the folded external tab.
优选地，还包括用于抚平外接极耳的抚平机构，抚平机构设置在外接极耳翻折装置和牵引固定装置之间。Preferably, it also includes a smoothing mechanism for smoothing the external tab, and the smoothing mechanism is arranged between the external tab folding device and the traction fixing device.
优选地，还包括用于对单片极片进行检测的检测机构和用于将合格的单片极片自动放入收集机构的极片挑选机构，检测机构设置在分切机构下游，极片挑选机构设置在检测机构下游。Preferably, it also includes a detection mechanism for detecting single-piece pole pieces and a pole-piece selection mechanism for automatically placing qualified single-piece pole pieces into the collection mechanism, the detection mechanism is arranged downstream of the slitting mechanism, and the pole piece is selected. The mechanism is arranged downstream of the detection mechanism.
优选地，极片挑选机构为吸盘式机械手。Preferably, the pole piece selection mechanism is a suction cup manipulator.
优选地，检测机构包括CCD检测装置和内阻测试装置，CCD检测装置位于抚平机构下游，内阻测试装置位于CCD检测装置下游。Preferably, the detection mechanism includes a CCD detection device and an internal resistance test device, the CCD detection device is located downstream of the leveling mechanism, and the internal resistance test device is located downstream of the CCD detection device.
优选地，牵引固定装置为吸盘机械手。Preferably, the traction fixing device is a suction cup manipulator.
优选地，还包括用于箔材放卷的箔材放卷机构和用于将箔材裁剪成箔材段的箔材裁剪机构，箔材裁剪机构设置于箔材放卷机构下游，箔材移送机构设置于箔材裁剪机构。Preferably, it also includes a foil material unwinding mechanism for foil material unwinding and a foil material cutting mechanism for cutting the foil material into foil material segments, the foil material cutting mechanism is arranged downstream of the foil material unwinding mechanism, and the foil material is transferred. The mechanism is arranged on the foil material cutting mechanism.
本发明中还提出了一种间歇涂布式极片用模切焊接方法，包括以下步骤：The present invention also proposes a die-cut welding method for intermittently coated pole pieces, comprising the following steps:
S1、将极片基材未涂布区进行极耳模切以形成极耳；S1. Die-cutting the uncoated area of the pole piece substrate to form the pole ear;
S2、将极耳和金属箔材段进行焊接以形成外接极耳；S2. Weld the tab and the metal foil segment to form an external tab;
S3、焊接完成后，将外接极耳长出的部分进行翻折；S3. After the welding is completed, fold the part that grows out of the external tab;
S4、将完成外接极耳翻折的极片基材分切成单片极片；S4. Divide the pole piece base material that has been folded over the external tabs into single pole pieces;
S5、将单片极片进行收集。S5, collecting the monolithic pole pieces.
优选地，S3步骤中，翻折角度为90-180度。Preferably, in step S3, the folding angle is 90-180 degrees.
优选地，S3步骤中，翻折角度为90度。Preferably, in step S3, the turning angle is 90 degrees.
优选地，S4步骤中，切割完成后，对单片极片的外接极耳进行抚平。Preferably, in step S4, after the cutting is completed, the external tabs of the monolithic pole piece are smoothed.
优选地，S5步骤中，对单片极片进行检测，将检测合格的单片极片进行收集。Preferably, in step S5, the monolithic pole pieces are detected, and the monolithic pole pieces that pass the detection are collected.
优选地，S5步骤中，检测合格的单片极片由吸盘式机械手吸取并送入收集机构中。Preferably, in step S5, the single-piece pole pieces that have passed the inspection are sucked by a suction cup-type manipulator and sent into the collecting mechanism.
优选地，S5步骤中，对单片极片进行检测CCD检测和内阻测试。Preferably, in step S5, CCD detection and internal resistance test are performed on the monolithic pole piece.
本发明采用先模切极耳成型、焊接外接极耳再进行分切的方式，满足极片生产要求的同时，实现了极片加工的连续性，并通过将外接极耳翻折的方法实现了焊接与分切的衔接，极大地减少了裁切的困难。The invention adopts the method of first die-cutting the tabs, welding the external tabs and then slitting, which not only meets the production requirements of the pole pieces, but also realizes the continuity of the pole piece processing. The connection between welding and slitting greatly reduces the difficulty of cutting.
附图说明Description of drawings
图1为本发明提出的一种间歇涂布式极片用模切焊接设备的结构示意图。FIG. 1 is a schematic structural diagram of a die-cutting and welding equipment for intermittent coating type pole pieces proposed by the present invention.
图2为本发明中的极片基材的模切焊接过程示意图。FIG. 2 is a schematic diagram of the die-cutting and welding process of the pole piece base material in the present invention.
附图标记说明：Description of reference numbers:
1-极片基材 2-极片基材放卷机构 3-极耳模切机构 4-焊接机构1-pole piece base material 2-pole piece base material unwinding mechanism 3-pole lug die-cutting mechanism 4-welding mechanism
5-外接极耳翻折装置 6-裁切装置 7-牵引固定装置 8-CCD检测装置5-External tab folding device 6-Cutting device 7-Traction fixing device 8-CCD detection device
9-内阻测试装置 10-极片挑选机构 11-收集机构9-Internal resistance test device 10-Pole piece selection mechanism 11-Collecting mechanism
具体实施方式Detailed ways
如附图所示，图1为本发明提出的一种间歇涂布式极片用模切焊接设备的结构示意图；图2为本发明中的极片基材1的模切焊接过程示意图，其中，A为极耳模切后的极片基材1，B为金属箔材段焊接后的极片基材1，C为外接极耳翻折后的极片基材1，D为单片极片，E为外接极耳抚平的单片极片。As shown in the accompanying drawings, FIG. 1 is a schematic structural diagram of a die-cutting and welding equipment for intermittent coating type pole pieces proposed by the present invention; FIG. 2 is a schematic diagram of the die-cutting and welding process of the pole piece base material 1 in the present invention, wherein , A is the pole piece base material 1 after die cutting of the pole tab, B is the pole piece base material 1 after the metal foil material section is welded, C is the pole piece base material 1 after the external tab is folded, and D is the single piece pole piece piece, E is a single piece of pole piece smoothed by the external tab.
参照图1和图2，本发明提出的一种间歇涂布式极片用模切焊接设备，包括：极片基材放卷机构2、极耳模切机构3、焊接机构4、分切机构、收集机构11和箔材移送机构；Referring to FIGS. 1 and 2 , a die-cutting and welding equipment for intermittent coating type pole pieces proposed by the present invention includes: a pole piece base
极片基材放卷机构2的下游依次设有极耳模切机构3、焊接机构4、分切机构和收集机构11，箔材移送机构设置在焊接机构4一侧，箔材移送机构用于将金属箔材段传送到焊接机构4，焊接机构4用于将金属箔材段和模切出的极耳焊接形成外接极耳；The pole piece base
分切机构包括极片基材固定装置、牵引固定装置7、外接极耳翻折装置5和裁切装置6，极片基材固定装置、外接极耳翻折装置5、牵引固定装置7依次设置在焊接机构4下游，裁切装置6设置在外接极耳翻折装置5一侧，裁切装置6用于将完成外接极耳翻折的极片基材1裁切成单片极片。The slitting mechanism includes a pole piece base material fixing device, a pulling
本发明中，先通过对间歇涂布的极片基材1进行极耳模切以切出极耳，确定极耳的形状，然后通过金属箔材段移送机构将金属箔材段传送至焊接机构4，从而将金属箔材段和模切出的极耳焊接形成外接极耳，接着通过极片基材固定装置和牵引固定装置7同时固定极片基材待裁切处的两侧，并通过外接极耳翻折装置5将外接极耳长出的地方进行翻折以使极片基材待裁切处暴露与裁切装置6的活动行程中，裁切装置6在不影响外接极耳的情况下对极片基材待裁切处进行裁切以形成单片极片，最后收集单片极片供后段工序使用。而裁切装置6、外接极耳翻折装置5复位，牵引固定装置7重新对极片基材固定装置固定的极片基材1进行固定和牵引，使下一个极片基材待裁切处移动至裁切装置6裁切处，重复上述操作，即可进行极片基材1的模切焊接过程。In the present invention, the electrode tabs are first cut out by die-cutting the intermittently coated pole piece base material 1 to determine the shape of the tabs, and then the metal foil material segments are transferred to the welding mechanism through the metal foil material segment transfer mechanism 4, thereby welding the metal foil material segment and the die-cut tab to form an external tab, and then fix both sides of the pole piece base material to be cut by the pole piece base material fixing device and the
本发明采用先模切极耳成型、焊接外接极耳再进行分切的方式，满足极片生产要求的同时，实现了极片加工的连续性，并通过将外接极耳翻折的方法实现了焊接与分切的衔接，极大地减少了裁切的困难。The invention adopts the method of first die-cutting the tabs, welding the external tabs and then slitting, which not only meets the production requirements of the pole pieces, but also realizes the continuity of the pole piece processing. The connection between welding and slitting greatly reduces the difficulty of cutting.
为了避免翻折后的外接极耳在裁切装置6的裁切过程中复位，影响切割，在本实施方式中，还包括外接极耳夹紧固定装置，外接极耳夹紧固定装置设置在外接极耳翻折装置5一侧，外接极耳夹紧固定装置用于固定翻折后的外接极耳。In order to prevent the folded external tabs from being reset during the cutting process of the cutting device 6 and affecting the cutting, in this embodiment, an external tab clamping and fixing device is also included, and the external tab clamping and fixing device is arranged on the external On one side of the
为了方便下一步进行收集或者检测等操作，在本实施方式中，还包括用于抚平外接极耳的抚平机构，抚平机构设置在外接极耳翻折装置5和牵引固定装置7之间。In order to facilitate the collection or detection in the next step, in this embodiment, a smoothing mechanism for smoothing the external tab is also included, and the smoothing mechanism is arranged between the external
为了保证所生产的单片极片的质量，在本实施方式中，还包括用于对单片极片进行检测的检测机构和用于将合格的单片极片自动放入收集机构11的极片挑选机构10，检测机构设置在分切机构下游，极片挑选机构10设置在检测机构下游。In order to ensure the quality of the monolithic pole pieces produced, in this embodiment, a detection mechanism for detecting the monolithic pole pieces and a pole piece for automatically placing the qualified monolithic pole pieces into the
为了在不损伤单片极片的基础上挑选移动单片极片，在本实施方式中，极片挑选机构10为吸盘式机械手。In order to select and move the monolithic pole piece without damaging the monolithic pole piece, in this embodiment, the pole
为了保证单片极片的质量，在本实施方式中，检测机构包括CCD检测装置8和内阻测试装置9，CCD检测装置8位于抚平机构下游，内阻测试装置9位于CCD检测装置8下游。In order to ensure the quality of the monolithic pole piece, in this embodiment, the detection mechanism includes a
在本实施方式中，牵引固定装置7为吸盘机械手。In this embodiment, the pulling and fixing
在本实施方式中，还包括用于箔材放卷的箔材放卷机构和用于将箔材裁剪成箔材段的箔材裁剪机构，箔材裁剪机构设置于箔材放卷机构下游，箔材移送机构设置于箔材裁剪机构。In this embodiment, a foil material unwinding mechanism for unwinding the foil material and a foil material cutting mechanism for cutting the foil material into foil material segments are further included, and the foil material cutting mechanism is arranged downstream of the foil material unwinding mechanism, The foil material transfer mechanism is provided in the foil material cutting mechanism.
本发明还提出了一种间歇涂布式极片用模切焊接方法，包括以下步骤：The present invention also proposes a die-cut welding method for intermittently coated pole pieces, comprising the following steps:
S1、将极片基材1未涂布区进行极耳模切以形成极耳；S1, the uncoated area of the pole piece base material 1 is subjected to pole ear die cutting to form the pole ear;
S2、将极耳和金属箔材段进行焊接以形成外接极耳；S2. Weld the tab and the metal foil segment to form an external tab;
S3、焊接完成后，将外接极耳长出的部分进行翻折；S3. After the welding is completed, fold the part that grows out of the external tab;
S4、将完成外接极耳翻折的极片基材1分切成单片极片；S4. Divide the pole piece base material that has completed the folding of the external tab into a single pole piece;
S5、将单片极片进行收集。S5, collecting the monolithic pole pieces.
本发明采用先模切极耳成型、外接极耳再进行分切的方法，满足极片生产要求的同时，实现了极片加工的连续性，并通过极耳翻折的方法实现了焊接与分切的衔接，极大地减少了裁切的困难。The present invention adopts the method of first die-cutting the tabs, forming the external tabs, and then cutting, so as to meet the production requirements of the pole pieces, and realize the continuity of the pole piece processing. The connection of cutting greatly reduces the difficulty of cutting.
为了在不影响切割的情况下尽可能的减少翻折对外接极耳的影响，在本实施方式中，S3步骤中，翻折角度为90-180度。In order to reduce the influence of the folding on the external tabs as much as possible without affecting the cutting, in this embodiment, in step S3, the folding angle is 90-180 degrees.
在进一步的具体实施方式中，S3步骤中，翻折角度为90度。In a further specific embodiment, in step S3, the folding angle is 90 degrees.
为了方便下一步进行收集或者检测等操作，在本实施方式中，S4步骤中，切割完成后，对单片极片的外接极耳进行抚平。In order to facilitate the collection or detection in the next step, in this embodiment, in step S4, after the cutting is completed, the external tabs of the monolithic pole piece are smoothed.
为了保证单片极片的质量，在本实施方式中，S5步骤中，对单片极片进行检测，将检测合格的单片极片进行收集。In order to ensure the quality of the monolithic pole pieces, in this embodiment, in step S5, the monolithic pole pieces are detected, and the monolithic pole pieces that pass the detection are collected.
为了在不损伤单片极片的基础上挑选移动单片极片，在本实施方式中，S5步骤中，检测合格的单片极片由吸盘式机械手吸取并送至收集机构11中。In order to select and move the monolithic pole pieces without damaging the monolithic pole pieces, in this embodiment, in step S5 , the monolithic pole pieces that pass the inspection are picked up by the suction cup manipulator and sent to the
在本实施方式中，S5步骤中，对单片极片进行检测CCD检测和内阻测试。In this embodiment, in step S5, the single-chip pole piece is subjected to CCD detection and internal resistance test.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.
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