WO2023071949A1 - 一种极片毛刺修复装置 - Google Patents

一种极片毛刺修复装置 Download PDF

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Publication number
WO2023071949A1
WO2023071949A1 PCT/CN2022/126819 CN2022126819W WO2023071949A1 WO 2023071949 A1 WO2023071949 A1 WO 2023071949A1 CN 2022126819 W CN2022126819 W CN 2022126819W WO 2023071949 A1 WO2023071949 A1 WO 2023071949A1
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WIPO (PCT)
Prior art keywords
pole piece
shaping
burr
main body
burrs
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PCT/CN2022/126819
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English (en)
French (fr)
Inventor
李�浩
李晓伟
裴振兴
宋英俊
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22885826.2A priority Critical patent/EP4357043A1/en
Publication of WO2023071949A1 publication Critical patent/WO2023071949A1/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/005—Edge deburring or smoothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • 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 application relates to the technical field of battery production equipment, in particular to a pole piece burr repairing device.
  • the present application provides a pole piece burr repair device to solve the technical problems in the prior art, which can transform the more harmful end face burrs into less harmful plane burrs, thereby reducing the safety risk of batteries at the market end .
  • the present application provides a pole piece burr repairing device, which includes several shaping rollers arranged in sequence along the conveying direction of the pole piece, and the shaping rollers include a main body part and a shaping part connected coaxially, and the shaping part A shaping surface is formed on the outer surface of the body, the shaping surface includes a first end connected to the main body and a second end away from the main body, the second end is smaller than the first end Closer to the axis of the shaping part, along the conveying direction of the pole piece, the included angles between several of the shaping surfaces and the surface of the pole piece decrease successively.
  • a number of shaping rollers are arranged in the conveying direction of the pole piece.
  • the shaping roller includes a main body and a shaping part. The part is located at the end of the main body to flatten the burrs on the pole piece.
  • On the conveying path of the pole piece several shaping surfaces successively contact the burrs on the pole piece.
  • the angle between the burrs decreases in turn, showing a gradient change, so that the angle between the burrs and the pole piece is gradually reduced on the premise that the direction of the burrs is outward, until the burrs are flattened, and the end face burrs are finally transformed into planar burrs, reducing the battery's market potential.
  • the included angle between the shaping surface at the end and the surface of the pole piece is equal to 0°.
  • the shaping surface of the shaping roller at the end is kept parallel to the surface of the pole piece, and is attached to the surface of the pole piece, so that when the pole piece passes, the burr is flattened to be parallel to the surface of the pole piece, and the short circuit caused by piercing the diaphragm is reduced The probability of repairing the effect is guaranteed.
  • the included angles between the four shaping surfaces and the surface of the pole piece decrease in an equal gradient.
  • the inclination angles of the four shaping surfaces change gradually.
  • At the two shaping surfaces in the middle gradually change the direction of the burr to the outside. The angle between the burr and the pole piece is reduced, and the burr is flattened on the shaping surface at the end, so that the end face burr is finally transformed into a plane burr.
  • the included angles between the four shaping surfaces and the surface of the pole piece are 45°, 30°, 15° and 0° respectively.
  • the difference in inclination angle between the two shaping surfaces of adjacent gradients is small, so that the burrs can be flattened gradually and smoothly, avoiding the large-angle flattening and flipping of the burrs, which will cause cracking and warping of the burrs.
  • several shaping rollers are provided on the upper and lower sides of the pole piece.
  • the shaping roller on the upper side of the pole piece is used to repair the upturned burr of the pole piece
  • the shaping roller on the upper side of the pole piece is used to repair the downturned burr of the pole piece.
  • the upper and lower sides are simultaneously repaired and flattened.
  • the upwarping and downwarping burr repair work can be completed by one-time conveying, which improves the repair efficiency.
  • the two shaping parts are symmetrically arranged at both axial ends of the main body part. Therefore, the burrs on the left and right sides of a single pole piece can be simultaneously repaired and flattened.
  • the shaping part is a pyramidal structure. It is easy to form and process, and the smooth outer surface of the cone structure is used to contact and flatten the burrs to avoid local damage to the burrs during the flattening process.
  • the shaping rollers rotate at the same speed through a driving component, and the linear speed of the several of the shaping rollers is equal to the conveying speed of the pole piece.
  • the driving part adjusts the linear speed of the shaping roller to be equal to the conveying speed of the pole piece, so as to avoid relative displacement between the shaping roller and the surface of the pole piece and damage the coating on the surface of the pole piece.
  • the driving component includes a driving motor, a driving shaft, and a driven shaft, and there are multiple driven shafts, and the multiple driven shafts correspond to the multiple shaping rollers one by one, so
  • the shaping roller is concentrically fixed on the driven shaft, the output end of the driving motor is connected to the driving shaft, and the driving shaft is connected to a plurality of driven shafts.
  • the driving force of the driving motor is transmitted to each driven shaft through the driving shaft, so that the shaping rollers on each driven shaft rotate synchronously, with compact structure, stable and high efficiency.
  • the shaping roller is made of stainless steel or rubber. This makes the shaping roller easy to process and manufacture and improves the overall strength.
  • Fig. 1 is a schematic diagram of burrs on the edge of battery pole pieces in the prior art
  • Fig. 2 is a structural schematic diagram of a pole piece burr processing device in the prior art
  • Fig. 3 is the axonometric view of the overall structure of the embodiment of the present application.
  • Fig. 4 is a schematic diagram of the structure of the working state of the embodiment of the present application.
  • 1-pole piece 3-metal foil, 4-burr, 5-upper roller, 9-lower roller.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Existing conventional batteries include a positive electrode sheet and a negative electrode sheet wound with each other (the positive electrode sheet and the negative electrode sheet are usually referred to as battery pole sheets), and the positive electrode sheet and the negative electrode sheet further include metal foil sheets as positive and negative electrode conductors and coated on Active substances on the surface of the metal foil.
  • Fig. 1 is the schematic diagram of the burr on the edge of the battery pole piece in the prior art; Formed, although invisible to the naked eye, viewed from a microscope, the burr 4 is inclined in all directions and is very irregular.
  • the burr is relatively harmful.
  • the burr is very easy to pierce the diaphragm between the two substrates during the electrode winding process, causing a short circuit of the battery, which greatly reduces the qualified rate of the battery. Burrs (parallel to the pole piece), where the end face burrs are far more harmful than plane burrs.
  • FIG. 2 is the pole piece in the prior art.
  • Schematic diagram of the chip burr processing device It includes an upper roller 5 and a lower roller 9 facing up and down, a certain gap is formed between the upper roller 5 and the lower roller 9, and the pole piece 1 with edge burrs passes through the gap formed by the upper roller 5 and the lower roller 9, The burr is squeezed by the inclination angle of the upper roller 5 and the lower roller 9 to achieve the effect of flattening the burr.
  • the equipment presses the burr from the outside to the inside until two bending points appear on the burr, which is very easy to warp and form a burr on the end face, which is likely to puncture the diaphragm and cause a short circuit, which is extremely risky.
  • the inventor realized that the burr can be pressed from the inside to the outside, and the more harmful end face burr can be transformed into a less harmful plane burr, thereby reducing the possibility of the positive and negative pole pieces of the battery being in contact due to the burr piercing the diaphragm inside the battery. Possibility, greatly improve the safety performance of the battery.
  • Fig. 3 is an axonometric view of the overall structure of the embodiment of the present application
  • Fig. 4 is a schematic diagram of the working state structure of the embodiment of the present application.
  • the present application provides a pole piece burr repairing device, which includes several shaping rollers 20.
  • the shaping rollers 20 include a coaxially connected main body portion 21 and a shaping portion 22.
  • a shaping surface 221 is formed on the outer surface of the shaping portion 22.
  • the shaping surface 221 It includes a first end connected to the main body 21 and a second end away from the main body 21. The second end is closer to the axis of the shaping part 22 than the first end.
  • several shaping The included angle between the surface 221 and the surface of the pole piece 10 decreases successively.
  • the shaping roller 20 includes two parts, the main body 21 and the shaping portion 22.
  • the main body 21 and the shaping portion 22 are preferably integrally formed to facilitate manufacturing and improve the overall strength.
  • the main body 21 is a round shaft body
  • the main body part 21 is attached to the surface of the pole piece 10
  • the shaping part 22 is coaxially connected to at least one end of the main body part 21, and at least part of the shaping part 22 protrudes from the edge of the pole piece 10, so as to eliminate the burrs on the side of the pole piece 10 Perform repair flattening.
  • the outer surface of the shaping part 22 forms a shaping surface 221, the first end of the shaping surface 221 is connected to the main body 21, and abuts against the surface of the pole piece 10, and the second end of the shaping part 22 is located at the axial end of the shaping roller 20 Since the second end of the shaping surface 221 is closer to the axis of the shaping portion 22 than the first end of the shaping surface 221, the diameter of the first end of the shaping surface 221 is larger than the diameter of the second end of the shaping surface 221 In this way, the inclination direction of the shaping surface 221 is defined, and the shaping part 22 as a whole is a cone structure that gradually shrinks from the inside to the outside of the pole piece 10, so that when the shaping surface 221 is in contact with the burr and exerts force, the burr is turned from the inside to the outside It avoids the contact between the burr and the surface of the pole piece 10, causing more bending points during the flipping process, and the subsequent technical problem of warping.
  • shaping rollers 20 are arranged in sequence along the conveying direction of the pole piece 10. During the conveying process, the pole piece 10 contacts the shaping surfaces 221 on the plurality of shaping rollers 20 in sequence, and the shaping surfaces 221 contact with the burrs protruding from the surface of the pole piece 10.
  • the burrs are turned from the inside to the outside at a certain angle in the direction of the pole piece 10, along the conveying direction of the pole piece 10, between several shaping surfaces 221 and the surface of the pole piece 10
  • the included angle decreases successively, that is, the inclination angle of the shaping surface 221 is smaller as it goes further, and the second end of the shaping surface 221 is closer to the surface of the pole piece 10, and the burr has experienced multiple shaping surfaces during the transportation process.
  • the burrs are parallel to the surface of the pole piece 10, forming a plane burr, which greatly reduces the possibility of the positive and negative pole pieces 10 of the battery being in contact due to the burrs inside the battery pole piece 10 piercing the diaphragm, and greatly improves the safety of the battery performance.
  • the angle between the most end shaping surface 221 and the surface of the pole piece 10 is equal to 0°.
  • the extension direction of the shaping surface 221 of the shaping roller 20 at the end is parallel to the axial direction of the shaping part 22, that is, the shaping surface 221 is flush with the outer contour surface of the main body part 21, and the shaping surface 221 of the shaping part 22 is also parallel to the main body part.
  • 21 are attached to the surface of the pole piece 10 together, so that the free end of the burr is lower than the surface of the pole piece 10, while maintaining a horizontal state, forming a plane burr, reducing the probability of piercing the diaphragm and causing a short circuit.
  • four shaping surfaces 221 are provided, along the conveying direction of the pole piece 10 , between the four shaping surfaces 221 and the surface of the pole piece 10 The included angle decreases in an equal gradient.
  • the included angle between the shaping surface 221 formed on the four shaping rollers 20 and the surface of the pole piece 10 decreases in an equal gradient, and the shaping at the starting end At the surface 221, change the pointing angle of the burr on the end face so that it faces outward.
  • the burr is flattened, so that the end face burr is finally transformed into a plane burr.
  • the number of shaping rollers 20 is not limited to four, and the number of shaping rollers 20 can be increased or decreased according to actual process requirements and cost considerations.
  • the adjacent two The smaller the difference in inclination angle of the shaping surface 221 formed on the shaping roller 20, the smoother the burr's stress-flipping process, and the smaller the angle of each flipping, thereby avoiding the burr's flipping and cracking caused by large-angle flipping.
  • the included angles between the four shaping surfaces 221 and the surface of the pole piece 10 are respectively 45°. , 30°, 15° and 0°.
  • the inclination angles of the two shaping surfaces 221 on adjacent gradients differ by 15°, so that the burrs can be flattened gradually and smoothly, and the burrs can be prevented from being flattened and flipped at a large angle, causing cracks and warping of the burrs.
  • each shaping surface 221 is not limited to the above-mentioned limitation, the inclination angle can be increased or decreased according to the actual situation, and the difference between the inclination angles of two shaping surfaces 221 with adjacent gradients can be adjusted.
  • several shaping rollers 20 are provided on the upper and lower sides of the pole piece 10 .
  • the shaping rollers 20 on the upper side of the pole piece 10 are located on the upper surface of the pole piece 10, and the shaping rollers 20 on the lower side of the pole piece 10 are located on the lower surface of the pole piece 10.
  • Several shaping rollers 20 on the upper and lower sides of the pole piece 10 are arranged symmetrically, and all They are arranged at intervals along the conveying direction of the pole piece 10 , and a passing gap is formed between the shaping rollers 20 on the upper and lower sides for the pole piece 10 to pass through.
  • the shaping roller 20 located on the upper side of the pole piece 10 is used to repair the upturned burrs of the pole piece 10. Its main body 21 is attached to the upper surface of the pole piece 10. The shaping surface 221 on the part 22 abuts against the burrs, so that the upturned burrs turn down until they are flattened.
  • the shaping roller 20 located on the upper side of the pole piece 10 is used to repair the downturned burrs of the pole piece 10.
  • the shaping surface 221 on the part 22 abuts against the burr, so that the downturned burr turns upward until it is flattened.
  • the upper and lower sides are simultaneously repaired and flattened, and the pole piece 10 only needs to be conveyed once in one direction to complete the upturned and downturned burr repair work, which improves the repair efficiency.
  • the passing gap formed between the shaping rollers 20 on the upper and lower sides can be adjusted, which is compatible with pole pieces 10 of different widths.
  • two shaping parts 22 are provided, and the two shaping parts 22 are symmetrically arranged at both axial ends of the main body part 21 .
  • a shaping part 22 is set at one end of the main body part 21, only the burrs on the left or right side can be repaired during a single transmission process of the pole piece 10, and the shaping parts 22 are set at both axial ends of the main body part 21 , the burrs on the left and right sides of a single pole piece 10 can be simultaneously repaired and flattened, and the repair efficiency is improved.
  • the shaping part 22 is a pyramid structure.
  • the shaping part 22 is a cone structure
  • the shaping surface 221 is formed on the outer peripheral surface of the cone structure
  • the large diameter end of the cone structure is connected with the main body part 21, and the cone structure
  • the small-diameter end of the body structure extends toward the side away from the main body 21.
  • the cone structure is easy to form and process, and the smooth outer surface of the cone structure is used to contact and flatten the burrs to avoid local damage to the burrs during the flattening process.
  • the shaping part 22 is a cylindrical structure, and the diameter of the cylindrical structure is equal to the diameter of the main body part 21, and the shaping surface 221 is formed on the outer peripheral surface of the cone-cylindrical structure.
  • the surface 221 is in contact with the surface of the pole piece 10 to flatten the burrs.
  • the several shaping rollers 20 are rotated at the same speed by the driving component 30 , and the linear speed of the several shaping rollers 20 is equal to the conveying speed of the pole piece 10 .
  • the driving part 30 adjusts the linear speed of the shaping roller 20 to be equal to the conveying speed of the pole piece 10 , so as to avoid relative displacement between the shaping roller 20 and the surface of the pole piece 10 and damage the coating on the surface of the pole piece 10 .
  • the shaping rollers 20 are concentrically fixed on the driven shaft 33 , the output end of the driving motor 31 is in transmission connection with the drive shaft 32 , and the drive shaft 32 is in transmission connection with the plurality of driven shafts 33 .
  • Both the driving shaft 32 and the driven shaft 33 are rotatably supported on the base surface through the bearing seat, the output shaft of the drive motor 31 is connected to the driving shaft 32 through the reducer, and the transmission mode between the driving shaft 32 and the driven shaft 33 Can refer to the transmission mode in the prior art, for example the mode of two bevel gears meshing, do not limit here, drive motor 31 works, drives driving shaft 32 to rotate, and driving shaft 32 then drives driven shaft 33 to rotate, makes
  • the linear speed of the shaping roller 20 is consistent with the conveying speed of the pole piece 10, and the conveying of the pole piece 10 can also be driven by clamping by the upper and lower two sets of shaping rollers 20. During the conveying process of the pole piece 10, the burr on the pole piece 10 is completed flattening operations.
  • the driving part 30 can not only rely on the driving mode of the driving motor 31, but also can be other types of driving force, such as the driving cylinder cooperates with the driving bar and the driving gear, as long as it can make several shaping rollers 20 can rotate synchronously, which is not limited here.
  • the shaping roller 20 is made of stainless steel or rubber. This makes the shaping roller 20 easy to process and manufacture and improves the overall strength.

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Abstract

一种极片毛刺修复装置，包括若干整形辊（20），整形辊（20）的外表面上形成有整形面（221），沿着极片（10）的输送方向，若干整形面（221）与极片（10）表面之间的夹角依次减小。极片毛刺修复装置逐步减小毛刺与极片间角度，直至将毛刺压平，将端面毛刺最终转变为平面毛刺，降低了电池的安全风险。

Description

一种极片毛刺修复装置
交叉引用
本申请要求在2021年10月28日提交中国专利局、申请号为202122601315.X、申请名称为“一种极片毛刺修复装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池生产设备技术领域，特别是一种极片毛刺修复装置。
背景技术
在电池生产过程中，当极片分条时，若分切刀磨损/刀模抖动等易在极片边缘产生平面(与极片平行)或端面(与极片垂直)毛刺。在现有生产技术下，无法保证在不损伤极片的情况下将毛刺完全清除。这些带有毛刺的极片装配成电池后，极易刺穿隔膜导致短路，其中端面毛刺的危害性远大于平面毛刺。
发明内容
鉴于上述问题，本申请提供一种极片毛刺修复装置，以解决现有技术中的技术问题，它能够将危害性大的端面毛刺转变为危害小的平面毛刺，从而降低电池在市场端的安全风险。
第一方面，本申请提供了一种极片毛刺修复装置，包括若干沿着极片的输送方向依次设置的整形辊，所述整形辊包括同轴连接的主体部以及整形部，所述整形部的外表面上形成有整形面，所述整形面包括与所述主体部连接的第一端部以及远离所述主体部的第二端部，所述第二端部较所述第一端部更靠近所述整形部的轴线，沿着所述极片的输送方向，若干所述整形面与所述极片表面之间的夹角依次减小。
本申请实施例的技术方案中，在极片的输送方向上设置若干整形辊，整形辊包括主体部以及整形部，所述主体部与极片表面贴合夹持，以稳定极片位置，整形部位于主体部的端部，对极片上的毛刺进行压平，在极片的输送路径上，若干整形面依次与极片上的毛刺接触，由于若干所述整形面与所述极片表面之间的夹角依次减小，呈现梯度变化，使得在毛刺方向朝外的前提下逐步减小毛刺与极片间角度，直至将毛刺压平，将端面毛刺最终转变为平面毛刺，降低电池在市场端的安全风险。
在一些实施例中，沿着所述极片的输送方向，最末端的所述整形面与所述极片表面之间的夹角等于0°。最末端的整形辊的整形面保持与极片的表面平行，贴合于极片的表面，从而使得极片在通过时，将毛刺压平至与极片的表面平行，降低刺穿隔膜导致短路的概率，保障修复效果。
在一些实施例中，所述整形面设有四个，沿着所述极片的输送方向，四个所述整形面与所述极片表面之间的夹角呈等梯度减小。四个所述整形面的倾斜角度呈梯度变化，在起始端的整形面处，改变端面毛刺指向角度，使之朝外，在中间的两个整形面处，在毛刺方向朝外的前提下逐步减小毛刺与极片间角度，在最末端的整形面处，对毛刺进行压平，使端面毛刺最终转变为平面毛刺。
在一些实施例中，沿着所述极片的输送方向，四个所述整形面与所述极片 表面之间的夹角分别为45°、30°、15°以及0°。相邻梯度的两个整形面的倾斜角度相差较小，从而能让毛刺逐步平顺的压平，避免将毛刺进行大角度压平翻转，对毛刺造成折裂起翘。
在一些实施例中，所述极片的上下两侧均设有若干整形辊。极片上侧的整形辊用于对极片上翘的毛刺进行修复，极片上侧的整形辊用于对极片下翘的毛刺进行修复，上下两侧同步进行修复压平作业，极片只需单向输送一次即可完成上翘和下翘的毛刺修复工作，提高了修复效率。
在一些实施例中，所述整形部设有两个，两个所述整形部对称设置于所述主体部的轴向两端。从而可以对单个极片的左右两侧的毛刺同步修复压平。
在一些实施例中，所述整形部为锥体结构。容易成型加工，且利用锥体结构的光滑的外表面与毛刺进行接触压平，避免毛刺在压平过程中局部发生破损。
在一些实施例中，若干所述整形辊通过驱动部件实现同速转动，且若干所述整形辊的线速度等于所述极片的输送速度。驱动部件将整形辊的线速度调整为等于所述极片的输送速度，从而避免整形辊与极片表面之间产生相对位移，破坏极片表面的涂层。
在一些实施例中，所述驱动部件包括驱动电机、主动轴以及从动轴，所述从动轴设有多个，多个所述从动轴与多个所述整形辊一一对应，所述整形辊同心固定于所述从动轴上，所述驱动电机的输出端与所述主动轴传动连接，所述主动轴与多个所述从动轴传动连接。驱动电机的驱动力经由主动轴传递至各个从动轴，从而使得各个从动轴上的整形辊同步转动，结构紧凑，稳定高效。
在一些实施例中，所述整形辊为不锈钢或橡胶材质。使得所述整形辊易于加工制造以及提高了整体强度。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1是现有技术中电池极片边缘毛刺的示意图；
图2是现有技术中极片毛刺处理装置的结构示意图；
图3是本申请实施例整体结构的轴测图；
图4是本申请实施例工作状态结构示意图；
在附图中，附图未必按照实际的比例绘制。
具体实施方式中的附图标号如下：
10-极片；
20-整形辊，21-主体部，22-整形部,221-整形面；
30-驱动部件，31-驱动电机，32-主动轴，33-从动轴。
现有技术中：
1-极片，3-金属箔，4-毛刺，5-上滚轮，9-下滚轮。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
现有常规电池包括相互卷绕的正极片及负极片(正极片及负极片通常称为电池极片)，而正极片及负极片又进一步包括作为正负电极导体的金属箔片以及涂布于金属箔片表面的活性物质。
在生产环节中，大极片一般需要通过分切机分割成符合规定尺寸的小极片。在使用极片分切机切割极片之后，极片的边缘都会产生朝向各个方向倾斜的毛刺。参照图1所示，图1为现有技术中电池极片边缘毛刺的示意图；毛刺是作为集流体的金属箔3(铜箔或铝箔)在剪切过程中，由于剪切变形、拉伸而 形成的，虽然肉眼看不到，但从显微镜中看，毛刺4是向各个方向倾斜的，很不规则。
毛刺具有比较大的危害性，毛刺在电极卷绕过程中非常容易刺破两基板间的隔膜引起电池短路，大大降低了电池的合格率，而毛刺又包括端面毛刺(与极片垂直)和平面毛刺(与极片平行)，其中端面毛刺的危害性远大于平面毛刺。
因此，消除电池正、负极极片毛刺成为解决电池安全性的一个重要课题，现有技术中，同时公开了一种极片毛刺处理装置，如图2所示，图2是现有技术中极片毛刺处理装置的结构示意图。其包括上下相对的上滚轮5和下滚轮9，上滚轮5和下滚轮9之间形成一定的间隙，将带有边缘毛刺的极片1穿过上滚轮5和下滚轮9形成的间隙内，通过上滚轮5和下滚轮9的倾斜角度对毛刺进行挤压，达到压平毛刺的效果。
该设备将毛刺从外向内压，至毛刺出现两个弯折点，极易发生起翘，形成端面毛刺，很有可能刺破隔膜发生短路，风险极大。
发明人由此意识到，可以将毛刺从内向外压，将危害性大的端面毛刺转变为危害小的平面毛刺，从而降低电池内部极片毛刺刺穿隔膜造成电池正、负极极片出现接触的可能性，大幅度提升电池的安全性能。
根据本申请的一些实施例，参照图3和图4所示，图3是本申请实施例整体结构的轴测图；图4是本申请实施例工作状态结构示意图。本申请提供了一种极片毛刺修复装置，包括若干整形辊20，整形辊20包括同轴连接的主体部21以及整形部22，整形部22的外表面上形成有整形面221，整形面221包括与主体部21连接的第一端部以及远离主体部21的第二端部，第二端部较第一端部更靠近整形部22的轴线，沿着极片10的输送方向，若干整形面221与极片10表面之间的夹角依次减小。
整形辊20包括主体部21和整形部22两个部分，主体部21与整形部22优选的是采用一体成型的方式，以方便加工制造以及提高整体强度，优选的是，主体部21为圆轴体，主体部21与极片10表面贴合，整形部22同轴连接于主体部21的至少一端，且至少部分整形部22突出于极片10的边沿，以对极片10边侧的毛刺进行修复压平。
整形部22的外表面形成整形面221，整形面221的第一端部与主体部21连接，并与极片10表面抵接，整形部22的第二端部则位于整形辊20的轴端，由于整形面221第二端部较整形面221的第一端部更靠近整形部22的轴线，所以整形面221的第一端部的直径较整形面221的第二端部的直径要大，这样就定义了整形面221的倾斜方向，整形部22整体为从极片10内侧向外侧逐渐收缩的锥体结构，使得整形面221在与毛刺接触施力过程中，毛刺是从内向外翻转的，避免了毛刺与极片10的表面接触，在翻转过程中造成更多的弯折点，后续发生起翘的技术问题。
若干整形辊20沿着极片10的输送方向依次设置，极片10在输送过程中，依次接触多个整形辊20上的整形面221，整形面221与凸出于极片10表面的毛刺接触，以提供毛刺一个朝向极片10方向的作用力，使得毛刺朝向极片10的方向从内向外翻折一定角度，沿着极片10的输送方向，若干整形面221与极片10表面之间的夹角依次减小，也就是越往后的整形面221的倾斜角度越小，整形面221的第二端部越靠近极片10的表面，毛刺在输送过程中，经历过多个整形面221的压平以后，毛刺与极片10的表面平行，形成平面毛刺，大大降低电池内部极片10毛刺刺穿隔膜造成电池正、负极极片10出现接触的可能性，大 幅度提升电池的安全性能。
根据本申请的一些实施例，可选地，参照图3和图4所示，沿着极片10的输送方向，最末端的整形面221与极片10表面之间的夹角等于0°。
在最末端的整形辊20的整形面221的延伸方向与整形部22的轴线方向平行，也就是整形面221与主体部21的外轮廓面平齐，整形部22的整形面221也与主体部21一同贴合于极片10表面，使得毛刺的自由端低于极片10的表面，同时保持水平状态，形成平面毛刺，降低刺穿隔膜导致短路的概率。
根据本申请的一些实施例，可选地，参照图3和图4所示，整形面221设有四个，沿着极片10的输送方向，四个整形面221与极片10表面之间的夹角呈等梯度减小。
沿着极片10的输送方向，设有四个整形辊20，四个整形辊20上所形成的整形面221与极片10表面之间的夹角呈等梯度减小，在起始端的整形面221处，改变端面毛刺指向角度，使之朝外，在中间的两个整形面221处，在毛刺方向朝外的前提下逐步减小毛刺与极片10间角度，在最末端的整形面221处，对毛刺进行压平，使端面毛刺最终转变为平面毛刺。
本领域的技术人员可以知晓，整形辊20的数目不限定于四个，可以根据实际工艺需求和成本考量，增减整形辊20的数目，当增加整形辊20的数目以后，相邻的两个整形辊20上所形成的整形面221的倾斜角度相差也越小，毛刺的受力翻转过程更加平顺，其每次翻转的角度也减少，从而可以避免大角度的翻转造成的毛刺翻折破裂。
根据本申请的一些实施例，可选地，继续参照图3至图5所示，沿着极片10的输送方向，四个整形面221与极片10表面之间的夹角分别为45°、30°、15°以及0°。
在起始端的整形面221处，改变端面毛刺指向角度，使之朝外，并使得毛刺的指向角度小于等于45°，在中间的两个整形面221处，在毛刺方向朝外的前提下逐步减小毛刺与极片10间角度，使得毛刺的指向角度逐渐小于15°，在最末端的整形面221处，对毛刺进行压平，使端面毛刺最终转变为平面毛刺。
相邻梯度的两个整形面221的倾斜角度相差15°，从而能让毛刺逐步平顺的压平，避免将毛刺进行大角度压平翻转，对毛刺造成折裂起翘。
本领域的技术人员可以知晓，每个整形面221的倾斜角度不限于上述限定，可以根据实际情况进行增减倾斜角度，以及调整相邻梯度的两个整形面221的倾斜角度的差值。
根据本申请的一些实施例，可选地，参照图5所示，极片10的上下两侧均设有若干整形辊20。
极片10上侧的整形辊20位于极片10的上表面，极片10下侧的整形辊20位于极片10的下表面，极片10上下两侧的若干整形辊20对称设置，且均沿着极片10的输送方向间隔设置，上下两侧的整形辊20之间形成通过间隙，以供极片10通过。
位于极片10上侧的整形辊20用于对极片10上翘的毛刺进行修复，其主体部21与极片10的上表面贴合，其整形部22突出于极片10的边沿，整形部22上的整形面221与毛刺抵接，使得上翘的毛刺向下翻转直至压平。
位于极片10上侧的整形辊20用于对极片10下翘的毛刺进行修复，其主体部21与极片10的下表面贴合，其整形部22突出于极片10的边沿，整形部22上的整形面221与毛刺抵接，使得下翘的毛刺向上翻转直至压平。
上下两侧同步进行修复压平作业，极片10只需单向输送一次即可完成上 翘和下翘的毛刺修复工作，提高了修复效率。且上下两侧的整形辊20之间形成的通过间隙可调整，对不同宽度极片10具有兼容性。
根据本申请的一些实施例，可选地，整形部22设有两个，两个整形部22对称设置于主体部21的轴向两端。
如果在主体部21的一端设置整形部22，在极片10单次传输过程中，只能对左侧或右侧的毛刺进行修复，而在主体部21的轴向两端均设置整形部22，可以对单个极片10的左右两侧的毛刺同步修复压平，提高修复效率。
根据本申请的一些实施例，可选地，整形部22为锥体结构。
在整形面221的倾斜角度不为0°的情况下，整形部22为锥体结构，整形面221形成于锥体结构的外圆周面，锥体结构的大径端与主体部21连接，锥体结构的小径端朝向背离主体部21的一侧延伸，锥体结构容易成型加工，且利用锥体结构的光滑的外表面与毛刺进行接触压平，避免毛刺在压平过程中局部发生破损。
在整形面221的倾斜角度为0°的情况下，整形部22为圆柱体结构，圆柱体结构的直径与主体部21的直径相等，整形面221形成于锥圆柱体结构的外圆周面，整形面221与极片10的表面相贴合，从而对毛刺进行压平。
根据本申请的一些实施例，可选地，若干整形辊20通过驱动部件30实现同速转动，且若干整形辊20的线速度等于极片10的输送速度。
驱动部件30将整形辊20的线速度调整为等于极片10的输送速度，从而避免整形辊20与极片10表面之间产生相对位移，破坏极片10表面的涂层。
根据本申请的一些实施例，可选地，参照图3所示，驱动部件30包括驱动电机31、主动轴32以及从动轴33，从动轴33设有多个，多个从动轴33与多个整形辊20一一对应，整形辊20同心固定于从动轴33上，驱动电机31的输出端与主动轴32传动连接，主动轴32与多个从动轴33传动连接。
主动轴32与从动轴33均通过轴承座可转动的支撑于基面上，驱动电机31的输出轴通过减速器与主动轴32轴接，主动轴32与从动轴33之间的传动方式可参照现有技术中的传动方式，例如两个锥形齿轮相啮合的方式，在此不做限定，驱动电机31工作，带动主动轴32旋转，主动轴32进而带动从动轴33旋转，使得整形辊20的线速度与极片10的输送速度保持一致，也可以由上下两组整形辊20夹持带动极片10的输送，在极片10的输送过程中，完成对极片10的毛刺的压平整形作业。
本领域的技术人员可以知晓，驱动部件30不仅仅可以依靠驱动电机31的驱动方式，也可以是其他类型的驱动力，例如驱动气缸与驱动条和驱动齿轮进行配合，只要能达到使得若干整形辊20同步转动即可，在此不做限定。
在一些实施例中，可选地，整形辊20为不锈钢或橡胶材质。使得整形辊20易于加工制造以及提高了整体强度。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (12)

  1. 一种极片毛刺修复装置，其特征在于，包括若干沿着极片的输送方向依次设置的整形辊，所述整形辊包括同轴连接的主体部以及整形部，所述整形部的外表面上形成有整形面，所述整形面包括与所述主体部连接的第一端部以及远离所述主体部的第二端部，所述第二端部较所述第一端部更靠近所述整形部的轴线，沿着所述极片的输送方向，若干所述整形面与所述极片表面之间的夹角依次减小。
  2. 根据权利要求1所述的极片毛刺修复装置，其特征在于：沿着所述极片的输送方向，最末端的所述整形面与所述极片表面之间的夹角等于0°。
  3. 根据权利要求1或2所述的极片毛刺修复装置，其特征在于：所述整形面设有四个，沿着所述极片的输送方向，四个所述整形面与所述极片表面之间的夹角呈等梯度减小。
  4. 根据权利要求3所述的极片毛刺修复装置，其特征在于：沿着所述极片的输送方向，四个所述整形面与所述极片表面之间的夹角分别为45°、30°、15°以及0°。
  5. 根据权利要求1-4任一项所述的极片毛刺修复装置，其特征在于：所述极片的上下两侧均设有若干整形辊。
  6. 根据权利要求1-5任一项所述的极片毛刺修复装置，其特征在于：所述整形部设有两个，两个所述整形部对称设置于所述主体部的轴向两端。
  7. 根据权利要求1-6任一项所述的极片毛刺修复装置，其特征在于：所述整形部为锥体结构。
  8. 根据权利要求1-7任一项所述的极片毛刺修复装置，其特征在于，与所述极片表面之间夹角为0°的所述整形面对应的所述整形部为圆柱体结构，其中，所述圆柱体结构的直径与所述主体部的直径相等，所述整形面形成于所述圆柱体结构的外圆周面。
  9. 根据权利要求1-8任一项所述的极片毛刺修复装置，其特征在于，所述主体部为圆轴体，所述主体部与所述极片表面贴合，所述整形部同轴连接于所述主体部的至少一端，且至少部分所述整形部突出于所述极片的边沿，以对极片边侧的毛刺进行修复压平。
  10. 根据权利要求1-9任一项所述的极片毛刺修复装置，其特征在于：若干所述整形辊通过驱动部件实现同速转动，且若干所述整形辊的线速度等于所述极片的输送速度。
  11. 根据权利要求10所述的极片毛刺修复装置，其特征在于：所述驱动部件包括驱动电机、主动轴以及从动轴，所述从动轴设有多个，多个所述从动轴与多个所述整形辊一一对应，所述整形辊同心固定于所述从动轴上，所述驱动电机的输出端与所述主动轴传动连接，所述主动轴与多个所述从动轴传动连接。
  12. 根据权利要求1-11任一项所述的极片毛刺修复装置，其特征在于：所述整形辊为不锈钢或橡胶材质。
PCT/CN2022/126819 2021-10-28 2022-10-21 一种极片毛刺修复装置 WO2023071949A1 (zh)

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