WO2023226944A1 - 极耳整形装置 - Google Patents

极耳整形装置 Download PDF

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Publication number
WO2023226944A1
WO2023226944A1 PCT/CN2023/095612 CN2023095612W WO2023226944A1 WO 2023226944 A1 WO2023226944 A1 WO 2023226944A1 CN 2023095612 W CN2023095612 W CN 2023095612W WO 2023226944 A1 WO2023226944 A1 WO 2023226944A1
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WO
WIPO (PCT)
Prior art keywords
tab
edge
shaping
pole
pole piece
Prior art date
Application number
PCT/CN2023/095612
Other languages
English (en)
French (fr)
Inventor
杨国众
孙祥立
李丰丹
吴小平
阳超
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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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
Publication of WO2023226944A1 publication Critical patent/WO2023226944A1/zh

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Classifications

    • 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
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • 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 field of batteries, and in particular to a tab shaping device.
  • Battery cells are widely used in electronic devices, such as mobile phones, laptops, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, etc.
  • the battery cells may include cadmium-nickel battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, secondary alkaline zinc-manganese battery cells, etc.
  • This application provides a pole lug shaping device, which can improve the efficiency of the pole piece.
  • the present application provides a pole tab shaping device, which is used to be arranged on the belt path of the pole piece.
  • the pole piece includes a pole piece main body and pole tabs led out from the end of the pole piece main body.
  • the pole tab shaping device is provided with a shaping surface, and the shaping surface is configured to flip the pole tab when the pole tab is bent relative to the pole piece body and passes through the shaping surface to reduce the bending angle of the pole tab relative to the pole piece body.
  • a shaping surface is provided to flip the tab when the tab passes through the shaping surface, thereby shaping the tab, reducing the bending angle of the tab, improving the product yield, and reducing the safety of the battery cell. risk.
  • the shaping surface can automatically identify whether the tab is bent, which can save the inspection process of the tab and improve production efficiency.
  • the shaping surface includes a spiral surface, and the spiral surface is used to flip the pole tab when the pole tab bent relative to the pole piece body passes through the spiral surface.
  • the spiral surface is a smooth curved surface, which can guide the tab to flip over and reduce the risk of the tab being wrinkled during the flipping process.
  • the shaping surface includes a first edge, a second edge, a third edge and a fourth edge.
  • the first edge and the second edge are respectively connected to two ends of the third edge and perpendicular to the third edge.
  • the fourth edge The edge is connected to an end of the first edge facing away from the third edge and an end of the second edge facing away from the third edge.
  • the angle at which the second edge rotates around the third edge relative to the first edge is ⁇ . ⁇ is 60°-190°, and the shaping surface can flip the tab to a larger angle to improve the applicability of the tab shaping device.
  • ⁇ is 175°-185°.
  • the shaping surface can be used to shape the tab that is bent back at a large angle, so that the tab shaping device has better applicability.
  • ⁇ is 180°.
  • the third edge extends along the first direction, and the first edge and the second edge are respectively provided at two ends of the shaping surface along the first direction.
  • the pole lug is drawn out from the end of the pole piece body along the second direction, and the first edge is parallel to the second direction.
  • the projection of the first edge and the projection of the third edge are both located within the projection of the main body of the pole piece, and the first direction, the second direction and the third direction are perpendicular to each other.
  • at least part of the second edge protrudes from the end of the lead tab of the pole piece body.
  • the projection of the first edge and the projection of the third edge are both located within the projection of the pole piece body, which can reduce the risk of interference between the pole shaping device and the pole.
  • At least part of the second edge protrudes from the end of the pole piece body where the pole tab is drawn out, thus guiding the pole tab to one side of the pole piece body along the second direction, and preventing the pole tab and the pole piece body from overlapping in the third direction. , reduce the bending angle of the pole tab relative to the pole piece body.
  • first edge and the second edge are parallel to the second direction and located on opposite sides of the third edge respectively.
  • the angle ⁇ at which the second edge rotates around the third edge relative to the first edge is 180°, and the shaping surface surrounded by the first edge, the second edge, the third edge and the fourth edge can be used for large
  • the pole tabs that are bent back at an angle can be reshaped to achieve a 180° flip of the pole tabs.
  • the size of the tab in the flattened state along the second direction is H1
  • the size of one edge is H2
  • the size of the second edge is H3, H1
  • H2 and H3 satisfy: H2 ⁇ H1, H3 ⁇ H1.
  • the first edge in the second direction, has a larger size relative to the tab.
  • the first edge can support the tab, To effectively guide the tab into the plastic surface.
  • the second edge In the second direction, the second edge has a larger size relative to the pole lug.
  • the pole lug leaves the shaping surface through the second edge, the second edge can shape the entire pole lug to improve the shaping effect of the pole lug.
  • the distance between the third edge and the end of the lead-out tab of the pole piece body is H4, and H4 is 0.5mm-10mm.
  • the pole piece may deviate in the second direction. If H4 is too small, the part of the pole piece shaping device located around the third edge may squeeze the root of the pole tab due to the deviation of the pole piece, causing the risk of pole tab damage.
  • the above technical solution makes the value of H4 greater than or equal to 0.5mm to reduce the risk of tab damage and improve safety.
  • H4 the greater the distance between the shaping surface and the tab in the second direction. If H4 is too large, the contact area between the tab and the shaping surface will be small, or even not in contact with the shaping surface, which will affect the shaping effect of the tab.
  • the above technical solution makes the value of H4 less than or equal to 10mm to improve the shaping effect of the tab.
  • H4 is 1mm-5mm.
  • a lug shaping device in some embodiments, includes a shaping member and a guide member.
  • the shaping member has a shaping surface, and both ends of the shaping surface along the first direction have first edges and second edges.
  • the guide member is connected to the shaping member, and at least part of the guide member protrudes from the first edge in the first direction.
  • the arrangement direction of the first edge and the second edge is opposite to the direction of the pole piece.
  • the guide member can be inserted between the tab and the main body of the pole piece to scoop up the tab and guide the tab to contact the shaping surface, thereby improving the shaping effect of the tab and reducing the risk of damage to the tab.
  • the pole piece body is configured to pass from a side of the guide member away from the shaping member along a third direction, the third direction being perpendicular to the first direction.
  • the distance w between the pole piece body and the guide member in the third direction satisfies: 0 ⁇ w ⁇ 1mm.
  • the shaping member further has a first surface for facing the pole piece, the shaping surface intersects the first surface, and the intersection therebetween includes a first edge and a second edge.
  • the guide member includes a connection part attached to the first surface and a guide part protruding from the first surface in the first direction.
  • the guide part can be used to be inserted between the tab and the main body of the pole piece to scoop up the tab and guide the tab to contact the shaping surface, thereby improving the shaping effect of the tab and reducing the risk of damage to the tab.
  • the connecting portion of the guide member is connected to the shaping member. When the guide portion is worn after repeated use, the guide member can be directly replaced without replacing the shaping member.
  • connection completely covers the first surface.
  • the connecting portion can separate the first surface and the tab, reducing the risk of friction between the first surface and the tab.
  • the elastic modulus of the guiding member is less than the elastic modulus of the shaping member.
  • the guide member has better elasticity; when the guide member is inserted between the tab and the main body of the pole piece and scoops up the tab, the tab is not easily damaged by the guide member with good elasticity.
  • the shaping member is made of non-metallic material.
  • the shaping components of the above technical solution are made of non-metallic materials, which can reduce metal particles generated by friction, reduce the risk of metal particles falling onto the main body of the pole piece, and improve safety.
  • the shaping component includes a metal base and a non-metal layer disposed on the surface of the metal base, and the non-metal layer forms a shaping surface.
  • the metal matrix can make the shaping component have higher strength and reduce the deformation of the shaping component.
  • the non-metallic layer is worn, only the non-metallic layer needs to be repaired, which can extend the service life of the plastic component.
  • the tab shaping device further includes a smoothing member connected to the shaping member, and in the first direction, the smoothing member is located on a side of the second edge away from the first edge, and the smoothing member is It is used to smooth the ears after plastic surgery.
  • the smoothing member can restrain the tab during its movement, reducing the risk of the tab being folded again, thereby smoothing the tab and reducing the risk of the tab being folded again.
  • the folds of the pole ear improve the shape of the pole ear.
  • At least a portion of the smoothing member is arc-shaped.
  • the arc-shaped part of the smoothing member can be used to cooperate with the roller of the transmission pole piece to smooth the pole lug.
  • the pole shaping device further includes rollers, and the rollers are used to guide the pole pieces to travel.
  • the shaping member is connected to the roller, and the smoothing member is used to smooth the tab passing between the roller and the smoothing member.
  • the roller can not only guide the pole piece to travel, but also cooperate with the smoothing member to smooth the pole tab, which can simplify the structure of the pole tab shaping device.
  • the roller includes a mounting shaft and a roller rotatably connected to the mounting shaft, and the roller is used to guide the pole piece to travel.
  • the tab shaping device also includes a fixing component connected to the shaping component and the mounting shaft to fix the shaping component to the mounting shaft.
  • the installation and fixation of the shaping component are realized by arranging the fixing component, so as to improve the stability of the shaping component and simplify the overall structure of the tab shaping device.
  • Figure 1 is a schematic structural diagram of the pole piece
  • Figure 2 is another structural schematic diagram of the pole piece
  • Figure 3 is a schematic structural diagram of a tab shaping device provided by some embodiments of the present application.
  • FIG 4 is a structural schematic diagram of the shaping component shown in Figure 3;
  • FIG 5 is another structural schematic diagram of the shaping member shown in Figure 3;
  • Figure 6 is a schematic top view of the tab shaping device shown in Figure 3;
  • Figure 7 is a schematic front view of the tab shaping device shown in Figure 3.
  • Figure 8 is a schematic structural diagram of the shaping member and guide member of the tab shaping device provided by some embodiments of the present application.
  • FIG 9 is a schematic structural diagram of the shaping component shown in Figure 8.
  • Figure 10 is a structural representation of the shaping member and the guiding member shown in Figure 8 from another angle. picture;
  • Figure 11 is a schematic structural diagram of the shaping member, guide member and smoothing member of the tab shaping device according to some embodiments of the present application;
  • Figure 12 is a partial enlarged schematic diagram of the tab shaping device shown in Figure 3;
  • Figure 13 is a schematic cross-sectional view of the tab shaping device shown in Figure 12;
  • Figure 14 is a schematic structural diagram of the shaping member, guide member and smoothing member of the tab shaping device according to some embodiments of the present application;
  • Figure 15 is a simplified schematic diagram of a tab shaping device according to other embodiments of the present application.
  • Figure 16 is a simplified schematic diagram of the tab shaping device in some embodiments of the present application.
  • the reference numbers for the specific implementation are as follows: 1. Pole piece; 11. Pole piece main body; 111. Active material layer; 12. Pole ear; 2. pole ear shaping device; 21. shaping component; 211. shaping surface; 211a, first edge; 211b, second edge; 211c, third edge; 211d, fourth edge; 212, first surface; 22, guide member; 221, connecting portion; 222, guide portion; 23, smoothing member; 24, roller; 241. Installation shaft; 242. Roller; 25. Fixed component; X, first direction; Y, second direction; Z, third direction.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
  • connection should be understood in a broad sense.
  • connection can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can be a fixed connection
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • “Plural” appearing in this application means two or more (including two).
  • parallel not only includes absolutely parallel situations, but also includes generally parallel situations that are conventionally recognized in engineering; at the same time, “perpendicular” includes not only absolutely vertical situations, but also includes conventional engineering practices.
  • a roughly vertical situation of cognition For example, if the angle between the two directions is 85°-90°, the two directions can be considered to be perpendicular; if the angle between the two directions is 0°-5°, the two directions can be considered to be parallel.
  • Battery cells have the advantages of high operating voltage, large specific energy, small size, long cycle life, and no memory effect, so they are widely used in a variety of electrical devices.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • the battery cells may include lithium-ion battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., which are not limited in the embodiments of the present application.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly includes a positive electrode piece, a negative electrode piece and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area.
  • the positive electrode coating area The positive electrode active material layer is coated, and the positive electrode tab is not coated with the positive electrode active material layer.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material.
  • the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector;
  • the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area.
  • the negative electrode coating area The negative electrode active material layer is coated, and the negative electrode tab is not coated with the negative electrode active material layer.
  • the negative electrode current collector may be made of copper, and the negative electrode active material layer may include a negative electrode active material.
  • the negative electrode active material may be carbon or silicon.
  • the material of the isolator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • embodiments of the present application provide a pole tab shaping device, which provides a shaping surface to flip the pole tab when the pole tab passes the shaping surface, thereby shaping the pole tab and reducing the bending angle of the pole tab. Improve product quality.
  • the tab shaping device described in the embodiment of the present application can be used to shape the positive tab of the positive electrode piece, and can also be used to shape the negative tab of the negative electrode piece.
  • Figure 1 is a schematic structural diagram of a pole piece
  • Figure 2 is another schematic structural diagram of a pole piece.
  • the pole piece 1 includes a pole piece body 11 and pole tabs 12 extending from the end of the pole piece body 11 .
  • the pole piece body 11 is the area of the pole piece 1 that is coated with the active material layer 111
  • the pole tab 12 is the area of the pole piece 1 that is not coated with the active material layer 111 .
  • the pole tab 12 has a small thickness and low strength. During the conveying process of the pole piece 1, the pole tab 12 may bend relative to the pole piece main body 11 due to gravity, airflow or other factors.
  • FIG. 2 shows four states of the tab 12, namely the normal state, the first bending state, the second bending state and the third bending state.
  • the pole tab 12 may also exist in other states.
  • the pole tab 12 When the pole tab 12 is in a normal state, the pole tab 12 is generally parallel to the pole piece body 11 .
  • the angle ⁇ at which the pole tab 12 is bent relative to the pole piece body 11 refers to the angle at which the pole tab 12 is bent relative to the normal state of the pole tab 12 .
  • the angle ⁇ 1 at which the pole tab 12 is bent relative to the pole piece body 11 satisfies: 0° ⁇ 90°; when the pole tab 12 is in the second bending state S2 When the pole tab 12 is in the third bending state S3, the pole tab 12 is bent relative to the pole piece body 11.
  • the angle ⁇ is approximately 180°.
  • the pole tab shaping device provided in the embodiment of the present application can be used to shape the pole tab 12 to reduce the bending angle ⁇ of the pole tab 12 relative to the pole piece body 11 .
  • FIG. 3 is a schematic structural diagram of the tab shaping device 2 provided by some embodiments of the present application
  • Figure 4 is a schematic structural view of the shaping member 21 shown in FIG. 3
  • FIG. 5 is another schematic structural view of the shaping member 21 shown in FIG. 3
  • FIG. 6 is a schematic top view of the tab shaping device 2 shown in FIG. 3.
  • the pole tab shaping device 2 of the embodiment of the present application is used to be arranged on the belt path of the pole piece 1.
  • the pole piece 1 includes a pole piece body 11 and an end portion of the pole piece body 11.
  • the pole tab shaping device 2 is provided with a shaping surface 211.
  • the shaping surface 211 is configured to: when the pole tab 12 bent relative to the pole piece body 11 passes through the shaping surface 211, the pole tab 12 is turned over to reduce the relative angle of the pole tab 12 to the pole. The angle at which the sheet body 11 is bent.
  • the tab shaping device 2 is suitable for equipment where there is a risk of bending the tab 12.
  • the tab shaping device 2 can be used for die-cutting equipment installed to the pole piece 1, winding equipment for the electrode assembly, or other equipment.
  • the pole piece 1 will pass through the pole shaping device 2 during the belt conveying process. It should be noted that the pole piece 1 passes through the pole tab shaping device 2, and it is not required that the pole piece 1 must be in contact with the pole tab shaping device 2. For example, when the pole tab 12 of the pole piece 1 is bent at a small angle relative to the pole piece body 11 (for example, less than 5°), the pole tab 12 of the pole piece 1 may not contact the shaping surface 211 .
  • the shaping surface 211 may be a smooth curved surface, or a surface formed by continuously splicing multiple planes.
  • the shaping surface 211 is used to shape the pole tab 12 to reduce the bending angle of the pole tab 12 relative to the pole piece body 11 . After passing through the shaping surface 211, as long as the bending angle of the pole tab 12 relative to the pole piece body 11 is reduced to a set range, it is not required that the pole tab 12 must be parallel to the pole piece body 11 after passing through the shaping surface 211. For example, after the pole tab 12 passes through the shaping surface 211 , the bending angle of the pole tab 12 relative to the pole piece body 11 only needs to be less than 15°.
  • the shaping surface 211 is provided to flip the pole tab 12 when it passes through the shaping surface 211, thereby shaping the pole tab 12, reducing the bending angle of the pole tab 12, and improving the quality of the product. efficiency and reduce the safety risks of battery cells.
  • the shaping surface 211 can automatically identify whether the pole tab 12 is bent, which can save the inspection process of the pole tab 12 and improve production efficiency.
  • the shaping surface 211 includes a spiral surface, and the spiral surface is used to flip the pole tab 12 when the pole tab 12 is bent relative to the pole piece body 11 and passes through the spiral surface.
  • a spiral surface is a geometric surface that is formed by a generatrix spiraling around an axis. surface formed.
  • the helix is a positive helix.
  • the spiral surface is a smooth curved surface that can guide the tab 12 to flip over and reduce the risk of wrinkles on the tab 12 during the flipping process.
  • the angle of rotation of the helical surface may be 30°-180°.
  • the angle of rotation of the helical surface may be 30°, 60°, 90°, 120°, 150° or 180°.
  • the shaping surface 211 includes a first edge 211a, a second edge 211b, a third edge 211c, and a fourth edge 211d.
  • the first edge 211a and the second edge 211b are respectively connected to two ends of the third edge 211c.
  • the fourth edge 211d is connected to an end of the first edge 211a facing away from the third edge 211c and an end of the second edge 211b facing away from the third edge 211c.
  • the angle at which the second edge 211b rotates relative to the first edge 211a around the third edge 211c is ⁇ , and ⁇ is 60°-190°.
  • the first edge 211a and the third edge 211c may be directly connected or indirectly connected.
  • a rounded corner may be provided at the intersection of the first edge 211a and the third edge 211c, so that the first edge 211a and the third edge 211c are connected through a circular arc edge.
  • the second edge 211b and the third edge 211c may be directly connected or indirectly connected.
  • a rounded corner may be provided at the intersection of the second edge 211b and the third edge 211c, so that the second edge 211b and the third edge 211c are connected through a circular arc edge.
  • the shaping surface 211 is generally spiral-shaped, which can guide the flipping of the tab 12 and reduce the risk of wrinkles of the tab 12 during the flipping process. Since ⁇ is 60°-190°, the shaping surface 211 can flip the tab 12 to a larger angle, thereby improving the applicability of the tab shaping device 2 .
  • the first edge 211a, the second edge 211b and the third edge 211c are all linear, and the fourth edge 211d is curved.
  • ⁇ is 175°-185°.
  • the shaping surface 211 can be used to shape the pole tab 12 that is bent back at a large angle, so that the pole tab shaping device 2 has better applicability.
  • the angle ⁇ at which the pole tab 12 is bent relative to the pole piece body 11 is approximately 180°; when the pole tab 12 enters the shaping surface 211, the shaping surface The surface 211 can guide the pole tab 12 to turn 175°-185°, so that the pole tab 12 is generally parallel to the pole piece body 11.
  • ⁇ is 180°.
  • the third edge 211c extends along the first direction X, and the first edge 211a and the second edge 211b are respectively provided at both ends of the shaping surface 211 along the first direction X.
  • the pole tab 12 is drawn out from the end of the pole piece body 11 along the second direction Y, and the first edge 211a is parallel to the second direction Y.
  • the projection of the first edge 211 a and the projection of the third edge 211 c are both located within the projection of the pole piece body 11 , and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.
  • the second direction Y at least part of the second edge 211 b protrudes from the end of the lead-out tab 12 of the pole piece body 11 .
  • the pole tab 12 first passes the first edge 211a, and then passes the second edge 211b.
  • the pole tab may interfere with the bent portion of the root of the tab 12 (the root of the tab 12 refers to the end of the tab 12 connected to the pole piece body 11).
  • the projection of the first edge 211a and the projection of the third edge 211c are both located within the projection of the pole piece body 11, which can reduce the possibility of interference between the pole shaping device 2 and the pole 12. risk.
  • the tab 12 is shaped by the shaping surface 211, it is separated from the shaping surface 211 through the second edge 211b.
  • at least part of the second edge 211b protrudes from the end of the lead tab 12 of the pole piece body 11, thus guiding the pole tab 12 to one side of the pole piece body 11 along the second direction Y, and making The pole tab 12 and the pole piece body 11 do not overlap in the third direction Z, which reduces the bending angle of the pole tab 12 relative to the pole piece body 11 .
  • first edge 211a and the second edge 211b are both parallel to the second direction Y and located on opposite sides of the third edge 211c respectively.
  • the angle ⁇ at which the second edge 211b rotates relative to the first edge 211a around the third edge 211c is 180°.
  • the shaping surface 211 surrounded by the first edge 211a, the second edge 211b, the third edge 211c and the fourth edge 211d can be For shaping the pole lug 12 that is bent back at a large angle, it can Enable to achieve 180° flip of pole lug 12.
  • the portion of the shaping surface 211 close to the first edge 211 a faces away from the pole piece main body 11
  • the portion of the shaping surface 211 close to the second edge 211 b faces the pole piece main body 11 .
  • the size of the tab 12 along the second direction Y in the flattened state is H1
  • the size of the first edge 211a is H2
  • the size of the second edge 211b is H3
  • H1 H2 and H3 satisfy: H2 ⁇ H1, H3 ⁇ H1.
  • the flattened state refers to a state in which the angle ⁇ at which the pole tab 12 is bent relative to the pole piece body 11 is 0°.
  • the first edge 211a has a larger size relative to the pole lug 12.
  • the first edge 211a can support The pole lug 12 can effectively guide the pole lug 12 into the shaping surface 211 .
  • the second edge 211b has a larger size relative to the tab 12.
  • the tab 12 leaves the shaping surface 211 through the second edge 211b, the second edge 211b can shape the entire tab 12. To improve the shaping effect of pole ear 12.
  • H2 is greater than H1.
  • H2 H1+5mm.
  • H3 is greater than H1.
  • H3 H1+5mm.
  • the distance between the third edge 211c and the end of the lead tab 12 of the pole piece body 11 is H4, and H4 is 0.5mm-10mm.
  • the pole piece 1 may deviate in the second direction Y. If H4 is too small, the portion of the tab shaping device 2 located around the third edge 211 c may squeeze the root of the tab 12 due to the deviation of the pole piece 1 , causing the risk of damage to the tab 12 . In view of this, the inventor made the value of H4 greater than or equal to 0.5mm to reduce the risk of damage to the tab 12 and improve safety.
  • H4 the greater the distance between the shaping surface 211 and the tab 12 in the second direction Y. If H4 is too large, the contact area between the tab 12 and the shaping surface 211 will be small, or even not in contact with the shaping surface 211, which will affect the shaping effect of the tab 12. In view of this, the inventor makes the value of H4 less than or equal to 10 mm to improve the shaping effect of the tab 12.
  • H4 is 0.5mm, 1mm, 2mm, 4mm, 5mm, 8mm or 10mm.
  • H4 is 1mm-5mm.
  • Fig. 7 is a schematic front view of the tab shaping device 2 shown in Fig. 3;
  • Fig. 8 is a schematic structural diagram of the shaping member 21 and the guide member 22 of the tab shaping device 2 provided in some embodiments of the present application;
  • Fig. 9 is a schematic diagram of the tab shown in Fig. 8
  • FIG. 10 is a schematic structural view of the shaping member 21 and the guide member 22 shown in FIG. 8 from another angle.
  • the tab shaping device 2 includes a shaping member 21 and a guide member 22 .
  • the shaping member 21 has a shaping surface 211, and the shaping surface 211 has a first edge 211a and a second edge 211b at both ends along the first direction X.
  • the guide member 22 is connected to the shaping member 21, and in the first direction X, at least part of the guide member 22 protrudes from the first edge 211a.
  • the pole piece 1 may pass through the shaping member 21 along the first direction X. During the conveying process of the pole piece 1, the pole piece 1 first passes the first edge 211a, and then passes the second edge 211b.
  • the first edge 211a and the second edge 211b are respectively located at both ends of the shaping surface 211 along the first direction X.
  • the first edge 211a extends in a direction perpendicular to the first direction X
  • the second direction Y extends in a direction perpendicular to the first direction X.
  • the guide member 22 and the shaping member 21 may be of an integrated structure or a split structure.
  • the guide member 22 and the shaping member 21 are two components provided separately, and the two are connected by bonding, snapping, welding or other means.
  • the guide member 22 may be used to guide the tab 12 into contact with the shaping surface 211 .
  • the pole tab shaping device 2 When assembling the pole tab shaping device 2, make the arrangement direction of the first edge 211a and the second edge 211b opposite to the walking direction of the pole piece 1.
  • the guide member 22 can be inserted between the tab 12 and the pole piece body 11 to scoop up the tab 12 and guide the tab 12 to contact the shaping surface 211 , thereby improving the shaping effect of the tab 12 and reducing the polarity. Risk of ear12 injury.
  • the shaping member 21 also has a first surface 212 for facing the pole piece 1 , the shaping surface 211 intersects the first surface 212 , and the intersection between the two includes a first edge 211 a and a second edge. 211b.
  • the guide member 22 includes a connection part 221 attached to the first surface 212 and a guide part 222 protruding from the first surface 212 in the first direction X.
  • the first surface 212 is used to face the pole piece body 11 .
  • the guide member 22 is located on the side of the shaping member 21 facing the pole piece body 11 .
  • the first surface 212 may be a plane or a curved surface.
  • first surface 212 is planar.
  • Attachment refers to an adhering connection.
  • the connecting portion 221 can be attached to the first surface 212 through adhesion, adsorption, fitting, or other means.
  • the connecting portion 221 can be bonded to the first surface 212 .
  • the guide portion 222 protrudes from the first surface 212 in the first direction X and is not attached to the first surface 212 .
  • the connecting portion 221 may cover part of the first surface 212 or completely cover the first surface 212 .
  • the guide portion 222 can be inserted between the pole tab 12 and the pole piece body 11 to scoop up the pole tab 12 and guide the pole tab 12 to contact the shaping surface 211, thereby improving the shaping effect of the pole tab 12 and reducing damage to the pole tab 12. risks of.
  • the connecting portion 221 of the guide member 22 is connected to the shaping member 21. When the guide portion 222 becomes worn after repeated use, the guide member 22 can be directly replaced without replacing the shaping member 21.
  • first surface 212 is planar. When the tab 12 passes the first surface 212, the first surface 212 can guide the tab 12.
  • the connecting portion 221 is bonded to the first surface 212 .
  • the connecting portion 221 completely covers the first surface 212 .
  • the connecting portion 221 can separate the first surface 212 and the tab 12, thereby reducing the risk of friction between the first surface 212 and the tab 12.
  • the elastic modulus of guide member 22 is less than the elastic modulus of shaping member 21 .
  • the elastic modulus refers to Young's modulus.
  • the guide member 22 has better elasticity; when the guide member 22 is inserted between the pole tab 12 and the pole piece body 11 and scoops up the pole tab 12, the pole tab 12 is not easily affected by the guide member with good elasticity. 22 damage.
  • the guide member 22 when the pole piece 1 passes through the pole tab shaping device 2, the guide member 22 is spaced apart from the pole piece body 11, so that friction between the guide member 22 and the pole piece body 11 can be avoided. The risk of wear of the guide member 22 and the pole piece body 11 is reduced.
  • the pole piece body 11 passes from the side of the guide member 22 away from the shaping member 21 along the third direction Z.
  • the distance w between the pole piece body 11 and the guide member 22 in the third direction Z satisfies: 0 ⁇ w ⁇ 1mm.
  • w is 0.1mm, 0.3mm, 0.5mm, 0.8mm or 1mm.
  • guide member 22 is made of non-metallic material. When tab 12 comes into contact with guide member 22 , tab 12 rubs against guide member 22 .
  • the guide member 22 in the embodiment of the present application is made of non-metallic material, which can reduce metal particles generated by friction, reduce the risk of metal particles falling onto the pole piece body 11, and improve safety.
  • the shaping member 21 is made of non-metallic material.
  • the shaping member 21 in the embodiment of the present application is made of non-metallic material, which can reduce metal particles generated by friction, reduce the risk of metal particles falling to the pole piece main body 11, and improve safety.
  • the shaping member 21 includes a metal base and a non-metal layer disposed on the surface of the metal base, and the non-metal layer forms the shaping surface 211 .
  • the non-metallic layer can be formed on the surface of the metal substrate through electroplating, mechanical plating, spraying, hot dipping or other processes.
  • the non-metal layer may completely cover the metal base, or may only cover a part of the metal base, as long as the part corresponding to the shaping surface 211 is a non-metal layer.
  • the metal matrix can make the shaping member 21 have higher strength and reduce the deformation of the shaping member 21 .
  • the non-metallic layer is worn, only the non-metallic layer needs to be repaired, which can extend the service life of the shaping component 21 .
  • the non-metallic layer also forms first surface 212 .
  • Fig. 11 is a schematic structural diagram of the shaping member 21, the guide member 22 and the smoothing member 23 of the tab shaping device 2 according to some embodiments of the present application;
  • Fig. 12 is a partial enlarged schematic diagram of the tab shaping device 2 shown in Fig. 3;
  • Fig. 13 is a schematic cross-sectional view of the tab shaping device 2 shown in FIG. 12 .
  • the tab shaping device 2 further includes a smoothing member 23 connected to the shaping member 21 .
  • the smoothing member 23 In the first direction X, the smoothing member 23 The member 23 is located on the side of the second edge 211b away from the first edge 211a. The smoothing member 23 is used to smooth the tab 12 after passing through the shaping surface 211.
  • the smoothing member 23 can be connected to the shaping member 21 by snapping, welding, fastener connection or other methods.
  • the smoothing member 23 can smooth the pole lug 12 through its own structure.
  • the smoothing mechanism can include two opposite plates. When the pole lug 12 passes between the two plates, the two plates perform a smoothing operation on the pole lug 12 . Smooth.
  • the smoothing member 23 may also cooperate with other structures to smooth the pole tabs 12 .
  • the smoothing member 23 may cooperate with rollers used to guide the pole piece 1 to travel to smooth the pole tabs 12 .
  • the smoothing member 23 can restrain the tab 12 during its movement, thereby reducing the risk of the tab 12 being folded again, thereby smoothing the tab 12. flat, reducing the wrinkles of the pole lug 12 and improving the shape of the pole lug 12.
  • At least part of the smoothing member 23 is arc-shaped.
  • the arc-shaped portion of the smoothing member 23 can be used to cooperate with the roller of the transmission pole piece 1 to smooth the pole tab 12 .
  • the surface of the smoothing member 23 used to smooth the tabs 12 is made of non-metallic material to reduce the risk of friction between the smoothing member 23 and the tabs 12 to generate metal particles.
  • the smoothing member 23 is entirely made of non-metallic material. In some alternative examples, the smoothing member 23 includes a metal base and a non-metal layer disposed on the surface of the metal base, and the non-metal layer is used to smooth the tab 12 .
  • the pole tab shaping device 2 also includes rollers 24 , which are used to guide the pole piece 1 to travel.
  • the shaping member 21 is connected to the roller 24
  • the smoothing member 23 is used to smooth the tab 12 passing between the roller 24 and the smoothing member 23 .
  • the roller 24 can not only guide the pole piece 1 to travel, but also cooperate with the smoothing member 23 to smooth the pole tab 12, which can simplify the structure of the pole tab shaping device 2.
  • the roller 24 includes a mounting shaft 241 and a roller 242 rotatably connected to the mounting shaft 241.
  • the roller 242 is used to guide the pole piece 1 to travel.
  • the tab shaping device 2 also includes a fixing member 25 connected to the shaping member 21 and the mounting shaft 241 to fix the shaping member 21 to the mounting shaft 241 .
  • the installation and fixation of the shaping member 21 is achieved by arranging the fixing member 25.
  • the overall structure of the tab shaping device 2 is simplified.
  • the tab shaping device 2 can also omit the roller 24, the fixing member 25 and other structures. In this way, the tab shaping device 2 has a smaller volume and a simple structure, and can be used as needed. Easy to install.
  • the wrapping angle corresponding to the arc-shaped portion of the smoothing member 23 can be determined according to the size of the tab 12 along the tape running direction, as long as the arc-shaped portion of the smoothing member 23 can completely cover Only 12 poles are enough.
  • the wrapping angle of the arc-shaped portion of the smoothing member 23 may be 60°-120°.
  • the wrapping angle of the arc-shaped portion of the smoothing member 23 may be 90°.
  • Figure 14 is a schematic structural diagram of the shaping member 21, the guide member 22 and the smoothing member 23 of the tab shaping device 2 according to some embodiments of the present application.
  • the arc-shaped portion of the smoothing member 23 may also have a larger wrapping angle.
  • the wrap angle of the arc-shaped portion of the smoothing member 23 may be 120°-180°.
  • the wrap angle of the arc-shaped portion of the smoothing member 23 may be 150°.
  • Figure 15 is a simplified schematic diagram of the tab shaping device 2 according to other embodiments of the present application.
  • two pole tab shaping devices 2 can be provided, and the two pole tab shaping devices 2 can be arranged along the belt conveying direction of the pole piece 1 .
  • One pole shaping device 2 is used to shape the pole tab 12 that is folded to one side of the pole piece body 11
  • the other pole tab shaping device 2 is used to shape the pole tab that is folded to the other side of the pole piece body 11 . 12 for plastic surgery.
  • Figure 16 is a simplified schematic diagram of the tab shaping device 2 in some embodiments of the present application.
  • two pole tab shaping devices 2 can be provided.
  • the two pole tab shaping devices 2 are arranged oppositely, and the pole piece main body 11 passes between the two pole tab shaping devices 2 .
  • One pole shaping device 2 is used to shape the pole tab 12 that is folded to one side of the pole piece body 11
  • the other pole tab shaping device 2 is used to shape the pole tab that is folded to the other side of the pole piece body 11 . 12 for plastic surgery.
  • the present application provides a tab shaping device 2 , which includes a shaping member 21 , a guide member 22 , a smoothing member 23 , a roller 24 and a fixing member 25 .
  • the roller 24 includes a mounting shaft 241 and a roller 242 rotatably connected to the mounting shaft 241.
  • the roller 242 is used to guide the pole piece 1 to travel.
  • the fixing member 25 is connected to the shaping member 21 and the mounting shaft 241 to fix the shaping member 21 to the mounting shaft 241 .
  • the shaping member 21 is arranged at the extreme On the belt path of the chip 1, it has a shaping surface 211.
  • the shaping surface 211 is configured to flip the pole tab 12 when the pole tab 12 bent relative to the pole piece body 11 passes the shaping surface 211 to reduce the size of the pole tab 12. The angle at which the pole piece body 11 is bent.
  • the shaping surface 211 includes a first edge 211a, a second edge 211b, a third edge 211c and a fourth edge 211d.
  • the first edge 211a and the second edge 211b are respectively connected to both ends of the third edge 211c and are perpendicular to the third edge 211c.
  • the fourth edge 211d is connected to an end of the first edge 211a facing away from the third edge 211c and an end of the second edge 211b facing away from the third edge 211c.
  • the angle at which the second edge 211b rotates relative to the first edge 211a around the third edge 211c is ⁇ , and ⁇ is 180°.
  • the third edge 211c is parallel to the first direction X.
  • the guide member 22 is connected to the shaping member 21 .
  • the smoothing member 23 is connected to the shaping member 21, and is located on the side of the second edge 211b away from the first edge 211a in the first direction X.
  • the smoothing member 23 is used to cooperate with the roller 242 to smooth
  • the tab 12 passes between the roller 242 and the smoothing member 23 .

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Abstract

本申请公开了一种极耳整形装置。极耳整形装置用于设置在极片的走带路径上。极片包括极片主体和从极片主体的端部引出的极耳。极耳整形装置设有整形面，整形面被配置为：在相对于极片主体弯折的极耳经过整形面时翻转极耳，以减小极耳相对于极片主体弯折的角度。通过设置整形面，以在极耳经过整形面时翻转极耳，从而对极耳进行整形，减小极耳弯折的角度，提高产品的优率，降低电池单体的安全风险。整形面能够自动识别极耳是否存在弯折情况，这样可以节省极耳的检查工序，提高生产效率。

Description

极耳整形装置
相关申请的交叉引用
本申请要求享有于2022年05月27日提交的名称为“极耳整形装置”的中国专利申请202210590751.8的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池领域，特别是涉及一种极耳整形装置。
背景技术
电池单体广泛用于电子设备，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。电池单体可以包括镉镍电池单体、氢镍电池单体、锂离子电池单体和二次碱性锌锰电池单体等。
在电池单体的极片的生产过程中，如果提高极片的优率，一直是本领域的研究方向。
发明内容
本申请提供一种极耳整形装置，其能提高极片的优率。
本申请提供一种极耳整形装置，其用于设置在极片的走带路径上。极片包括极片主体和从极片主体的端部引出的极耳。极耳整形装置设有整形面，整形面被配置为：在相对于极片主体弯折的极耳经过整形面时翻转极耳，以减小极耳相对于极片主体弯折的角度。
上述技术方案中，通过设置整形面，以在极耳经过整形面时翻转极耳，从而对极耳进行整形，减小极耳弯折的角度，提高产品的优率，降低电池单体的安全风险。整形面能够自动识别极耳是否存在弯折情况，这样可以节省极耳的检查工序，提高生产效率。
在一些实施方式中，整形面包括螺旋面，螺旋面用于在相对于极片主体弯折的极耳经过螺旋面时翻转极耳。
上述技术方案中，螺旋面为平滑的曲面，其能够引导极耳翻转，并降低极耳在翻转过程中褶皱的风险。
在一些实施方式中，整形面包括第一边缘、第二边缘、第三边缘和第四边缘，第一边缘和第二边缘分别连接于第三边缘的两端并垂直于第三边缘，第四边缘连接于第一边缘背离第三边缘的一端和第二边缘背离第三边缘的一端。第二边缘相对于第一边缘绕第三边缘旋转的角度为α。α为60°-190°，整形面可以将极耳翻转较大的角度，以提高极耳整形装置的适用性。
在一些实施方式中，α为175°-185°。
上述技术方案中，整形面可以用于对大角度回折的极耳进行整形，以使极耳整形装置具有较好的适用性。
在一些实施方式中，α为180°。
在一些实施方式中，第三边缘沿第一方向延伸，第一边缘和第二边缘分别设于整形面沿第一方向的两端。极耳从极片主体沿第二方向的端部引出，第一边缘平行于第二方向。在第三方向上，第一边缘的投影和第三边缘的投影均位于极片主体的投影内，第一方向、第二方向和第三方向两两垂直。在第二方向上，第二边缘的至少部分凸出于极片主体的引出极耳的端部。
上述技术方案中，在第三方向上，第一边缘的投影和第三边缘的投影均位于极片主体的投影内，这样可以降低极耳整形装置与极耳干涉的风险。第二边缘的至少部分凸出于极片主体的引出极耳的端部，这样将极耳引导至极片主体沿第二方向的一侧，并使极耳和极片主体在第三方向上不重叠，减小极耳相对于极片主体弯折的角度。
在一些实施方式中，第一边缘和第二边缘均平行于第二方向且分别位于第三边缘相反的两侧。
上述技术方案中，第二边缘相对于第一边缘绕第三边缘旋转的角度α为180°，第一边缘、第二边缘、第三边缘以及第四边缘围成的整形面可以用于对大角度回折的极耳进行整形，能够实现极耳的180°翻转。
在一些实施方式中，极耳在展平状态下沿第二方向的尺寸为H1，第 一边缘的尺寸为H2，第二边缘的尺寸为H3，H1、H2和H3满足：H2≥H1，H3≥H1。
上述技术方案中，在第二方向上，第一边缘相对于极耳具有较大的尺寸，当极耳经过第一边缘时，如果极耳与第一边缘接触，第一边缘可以支撑极耳，以有效地引导极耳进入整形面。在第二方向上，第二边缘相对于极耳具有较大的尺寸，当极耳经由第二边缘离开整形面时，第二边缘可以对极耳整体进行整形，以改善极耳的整形效果。
在一些实施方式中，H1和H2满足：H2＝H1+5mm。
在一些实施方式中，H1和H3满足：H3＝H1+5mm。
在一些实施方式中，在第二方向上，第三边缘和极片主体的引出极耳的端部之间的间距为H4，H4为0.5mm-10mm。
在极片的走带过程中，极片可能会在第二方向上出现偏差。如果H4过小，那么极片整形装置的位于第三边缘周围的部分可能会因为极片的偏差而挤压极耳的根部，引发极耳损伤的风险。上述技术方案使H4的值大于或等于0.5mm，以降低极耳损伤风险，提高安全性。
H4的值越大，整形面在第二方向上与极耳的的间距也越大。如果H4过大，那么极耳和整形面的接触面积偏小，甚至不与整形面接触，这样会影响极耳的整形效果。上述技术方案使H4的值小于或等于10mm，以改善极耳的整形效果。
在一些实施方式中，H4为1mm-5mm。
在一些实施方式中，极耳整形装置包括整形构件和引导构件。整形构件具有整形面，整形面沿第一方向的两端具有第一边缘和第二边缘。引导构件连接于整形构件，在第一方向上，引导构件的至少部分凸出于第一边缘。
在上述技术方案中，在装配极耳整形装置时，使第一边缘和第二边缘的布置方向与极片的走带方向相反，在极片走带的过程中，如果极耳回折到极片主体上，引导构件可以插入到极耳和极片主体之间，以将极耳铲起并引导极耳与整形面接触，从而改善极耳的整形效果，降低极耳损伤的风险。
在一些实施方式中，极片主体用于从引导构件沿第三方向背离整形构件的一侧经过，第三方向垂直于第一方向。极片主体和引导构件在第三方向上的间距w满足：0＜w≤1mm。
在一些实施方式中，整形构件还具有用于面向极片的第一表面，整形面与第一表面相交，且两者之间的交线包括第一边缘和第二边缘。引导构件包括连接部和引导部，连接部附接于第一表面，在第一方向上，引导部凸出于第一表面。
上述技术方案中，引导部可用于插入到极耳和极片主体之间，以将极耳铲起并引导极耳与整形面接触，从而改善极耳的整形效果，降低极耳损伤的风险。引导构件的连接部连接到整形构件，当引导部经过多次使用后出现磨损时，直接更换引导构件即可，无需更换整形构件。
在一些实施方式中，连接部完全覆盖第一表面。当极耳经由第二边缘离开整形面时，连接部可以将第一表面和极耳隔开，降低第一表面与极耳摩擦的风险。
在一些实施方式中，引导构件的弹性模量小于整形构件的弹性模量。相对于整形构件，引导构件具有较好的弹性；当引导构件插入极耳和极片主体之间并铲起极耳时，极耳不易被具有较好弹性的引导构件损伤。
在一些实施方式中，整形构件由非金属材质制成。
当极耳经过整形面并与整形面接触时，极耳会与整形构件摩擦。上述技术方案的整形构件由非金属材质制成，这样可以减少摩擦产生的金属颗粒，降低金属颗粒掉落到极片主体的风险，提高安全性。
在一些实施方式中，整形构件包括金属基体和设置于金属基体表面的非金属层，非金属层形成整形面。
上述技术方案中，金属基体可以使整形构件具有较高的强度，降低整形构件的变形。当非金属层出现磨损时，只需修复非金属层即可，这样可以延长整形构件的使用寿命。
在一些实施方式中，极耳整形装置还包括抚平构件，抚平构件连接于整形构件，在第一方向上，抚平构件位于第二边缘的背离第一边缘的一侧，抚平构件用于抚平经过整形面之后的极耳。
上述技术方案中，在极耳经由第二边缘离开整形面后，抚平构件可以在极耳行进的过程中约束极耳，降低极耳再次翻折的风险，进而对极耳进行抚平，减少极耳的褶皱，改善极耳的形态。
在一些实施方式中，抚平构件的至少部分为圆弧形。抚平构件的呈圆弧形的部分可用于与传动极片的辊轮配合，以抚平极耳。
在一些实施方式中，极耳整形装置还包括辊轮，辊轮用于引导极片走带。整形构件连接于辊轮，抚平构件用于抚平从辊轮和抚平构件之间穿过的极耳。
上述技术方案中，辊轮既可以引导极片走带，还可与抚平构件配合来抚平极耳，这样可简化极耳整形装置的结构。
在一些实施方式中，辊轮包括安装轴和可转动地连接于安装轴的辊筒，辊筒用于引导极片走带。极耳整形装置还包括固定构件，连接于整形构件和安装轴，以将整形构件固定于安装轴。
上述技术方案中，通过设置固定构件来实现整形构件的安装和固定，以提高整形构件的稳定性，简化极耳整形装置的整体结构。
附图说明
下面将参考附图来描述本申请示例性实施例的特征、优点和技术效果。
图1为极片的一结构示意图；
图2为极片的另一结构示意图；
图3为本申请一些实施例提供的极耳整形装置的结构示意图；
图4为图3所示的整形构件的一结构示意图；
图5为图3所示的整形构件的另一结构示意图；
图6为图3所示的极耳整形装置的俯视示意图；
图7为图3所示的极耳整形装置的正视示意图；
图8为本申请一些实施例提供的极耳整形装置的整形构件和引导构件的结构示意图；
图9为图8所示的整形构件的结构示意图；
图10为图8所示的整形构件和引导构件在另一角度下的结构示意 图；
图11为本申请一些实施例的极耳整形装置的整形构件、引导构件和抚平构件的结构示意图；
图12为图3所示的极耳整形装置的局部放大示意图；
图13为图12所示的极耳整形装置的剖视示意图；
图14为本申请一些实施例的极耳整形装置的整形构件、引导构件和抚平构件的结构示意图；
图15为本申请另一些实施例的极耳整形装置的简化示意图；
图16为本申请在一些实施例的极耳整形装置的简化示意图。
具体实施方式的附图标记如下：
1、极片；11、极片主体；111、活性物质层；12、极耳；
2、极耳整形装置；21、整形构件；211、整形面；211a、第一边缘；
211b、第二边缘；211c、第三边缘；211d、第四边缘；212、第一表面；22、引导构件；221、连接部；222、引导部；23、抚平构件；24、辊轮；241、安装轴；242、辊筒；25、固定构件；
X、第一方向；Y、第二方向；Z、第三方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请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；本申请中在申请的说明书 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。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“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。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。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中的具体含义。
本申请中术语“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，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
在本申请的实施例中，“平行”不仅包括绝对平行的情况，也包括了工程上常规认知的大致平行的情况；同时，“垂直”也不仅包括绝对垂直的情况，还包括工程上常规认知的大致垂直的情况。示例性地，两个方向的夹角为85°-90°，可认为两个方向垂直；两个方向的夹角为0°-5°，可认为两个方向平行。
电池单体具有工作电压高、比能量大、体积小、循环寿命长、无记忆效应等优点，因此广泛应用于多种用电装置。用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
电池单体可以包括锂离子电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。
电池单体包括电极组件和电解液，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极涂覆区和连接于正极涂覆区的正极极耳，正极涂覆区涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池单体为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极涂覆区和连接于负极涂覆区的负极极耳，负极涂覆区涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
在电极组件的生产过程中，需要设置传动辊来引导极片走带、变向。发明人注意到，由于极耳较薄，所以极耳很容易在极片的走带过程中弯折， 造成极片不合格。如果检查到极耳弯折，那么极片通常进行报废处理，造成物料浪费；如果极耳的弯折没有被检查出，那么当极片组装成电极组件时，弯折的极耳可能会将正负极导通，使产品存在安全风险。
鉴于此，本申请实施例提供了一种极耳整形装置，其通过设置整形面，以在极耳经过整形面时翻转极耳，从而对极耳进行整形，减小极耳弯折的角度，提高产品的优率。
本申请实施例描述的极耳整形装置，既可以用于对正极极片的正极极耳进行整形，也可用于对负极极片的负极极耳进行整形。
图1为极片的一结构示意图；图2为极片的另一结构示意图。
如图1和图2所示，极片1包括极片主体11和从极片主体11的端部引出的极耳12。示例性地，极片主体11为极片1的涂覆有活性物质层111的区域，极耳12为极片1的未涂覆活性物质层111的区域。
极耳12的厚度较小，强度较低，在极片1的走带过程中，极耳12可能会因为重力、气流或其它因素而相对于极片主体11弯折。
示例性地，图2示出了极耳12的四种状态，即正常状态、第一弯折状态、第二弯折状态和第三弯折状态。当然，在极片1的生产过程中，极耳12还可存在其它状态。
在极耳12处于正常状态时，极耳12大体平行于极片主体11。极耳12相对于极片主体11弯折的角度β指的是：极耳12当前状态相对于极耳12的正常状态弯折的角度。
例如，在极耳12处于第一弯折状态S1时，极耳12相对于极片主体11弯折的角度β1满足：0°＜β≤90°；在极耳12处于第二弯折状态S2时，极耳12相对于极片主体11弯折的角度β2满足：90°＜β＜180°；在极耳12处于第三弯折状态S3时，极耳12相对于极片主体11弯折的角度β大体为180°。
本申请实施例提供的极耳整形装置，可用于对极耳12进行整形，以减小极耳12相对于极片主体11弯折的角度β。
下面结合附图详细描述本申请的极耳整形装置。
图3为本申请一些实施例提供的极耳整形装置2的结构示意图；图 4为图3所示的整形构件21的一结构示意图；图5为图3所示的整形构件21的另一结构示意图；图6为图3所示的极耳整形装置2的俯视示意图。
如图3至图6所示，本申请实施例的极耳整形装置2用于设置在极片1的走带路径上，极片1包括极片主体11和从极片主体11的端部引出的极耳12。极耳整形装置2设有整形面211，整形面211被配置为：在相对于极片主体11弯折的极耳12经过整形面211时翻转极耳12，以减小极耳12相对于极片主体11弯折的角度。
极耳整形装置2适用于存在极耳12弯折风险的设备，例如极耳整形装置2可用于安装到极片1的模切设备、电极组件的卷绕设备或其它设备。
极片1在走带的过程中会经过极耳整形装置2。需要说明的是，极片1经过极耳整形装置2，并不要求极片1一定与极耳整形装置2接触。例如，当极片1的极耳12相对于极片主体11弯折的角度较小时(例如小于5°时)，极片1的极耳12可以不与整形面211接触。
本申请对整形面211的形状不作特别限制，只要整形面211能够引导极耳12翻转即可。示例性地，整形面211可以是一个平滑的曲面，也可以是由多个平面连续拼接而成的面。
整形面211用于对极耳12进行整形，以减小极耳12相对于极片主体11弯折的角度。在经过整形面211后，只要极耳12相对于极片主体11弯折的角度减小至设定的范围即可，不要求极耳12经过整形面211后一定与极片主体11平行。示例性地，在极耳12经过整形面211后，极耳12相对于极片主体11弯折的角度小于15°即可。
在本申请实施例中，通过设置整形面211，以在极耳12经过整形面211时翻转极耳12，从而对极耳12进行整形，减小极耳12弯折的角度，提高产品的优率，降低电池单体的安全风险。整形面211能够自动识别极耳12是否存在弯折情况，这样可以节省极耳12的检查工序，提高生产效率。
在一些实施例中，整形面211包括螺旋面，螺旋面用于在相对于极片主体11弯折的极耳12经过螺旋面时翻转极耳12。
螺旋面是一种几何曲面，是由一条母线绕着一条轴线作螺旋运动而 形成的曲面。示例性地，螺旋面为正螺旋面。
螺旋面为一种平滑的曲面，其能够引导极耳12翻转，并降低极耳12在翻转过程中褶皱的风险。
在一些实施例中，螺旋面旋转的角度可为30°-180°。示例性地，螺旋面旋转的角度可为30°、60°、90°、120°、150°或180°。
在一些实施例中，整形面211包括第一边缘211a、第二边缘211b、第三边缘211c和第四边缘211d，第一边缘211a和第二边缘211b分别连接于第三边缘211c的两端并垂直于第三边缘211c，第四边缘211d连接于第一边缘211a背离第三边缘211c的一端和第二边缘211b背离第三边缘211c的一端。第二边缘211b相对于第一边缘211a绕第三边缘211c旋转的角度为α，α为60°-190°。
第一边缘211a和第三边缘211c可以直接相连，也可以间接相连。示例性地，为了降低极耳12被划伤的风险，可以在第一边缘211a和第三边缘211c的交界处设圆角，以使第一边缘211a和第三边缘211c通过圆弧边缘相连。
第二边缘211b和第三边缘211c可以直接相连，也可以间接相连。示例性地，为了降低极耳12被划伤的风险，可以在第二边缘211b和第三边缘211c的交界处设圆角，以使第二边缘211b和第三边缘211c通过圆弧边缘相连。
在本实施例中，整形面211大体为螺旋状，其能够引导极耳12翻转，并降低极耳12在翻转过程中褶皱的风险。由于α为60°-190°，因此整形面211可以将极耳12翻转较大的角度，以提高极耳整形装置2的适用性。
在一些实施例中，第一边缘211a、第二边缘211b和第三边缘211c均为直线状，第四边缘211d为曲线状。
在一些实施例中，α为175°-185°。整形面211可以用于对大角度回折的极耳12进行整形，以使极耳整形装置2具有较好的适用性。
例如，当极耳12回折到极片主体11一侧时，极耳12相对于极片主体11弯折的角度β大体为180°；当极耳12进入整形面211后，整形 面211可以引导极耳12翻转175°-185°，以使极耳12大体与极片主体11平行。
在一些实施例中，α为180°。
在一些实施例中，第三边缘211c沿第一方向X延伸，第一边缘211a和第二边缘211b分别设于整形面211沿第一方向X的两端。极耳12从极片主体11沿第二方向Y的端部引出，第一边缘211a平行于第二方向Y。在第三方向Z上，第一边缘211a的投影和第三边缘211c的投影均位于极片主体11的投影内，第一方向X、第二方向Y和第三方向Z两两垂直。在第二方向Y上，第二边缘211b的至少部分凸出于极片主体11的引出极耳12的端部。
在极片1的走带过程中，沿极片1的走带方向，极耳12先经过第一边缘211a，再经过第二边缘211b。
如果第三边缘211c位于极片主体11沿第二方向Y的一侧，且第三边缘211c与极片主体11在第三方向Z不重叠，那么在极片1走带的过程中，极耳整形装置2的靠近第三边缘211c的部分可能与极耳12根部(极耳12根部指的是极耳12的连接于极片主体11的端部)的弯折部位干涉。在本实施例中，在第三方向Z上，第一边缘211a的投影和第三边缘211c的投影均位于极片主体11的投影内，这样可以降低极耳整形装置2与极耳12干涉的风险。
极耳12经过整形面211整形后，经由第二边缘211b脱离整形面211。在本实施例中，第二边缘211b的至少部分凸出于极片主体11的引出极耳12的端部，这样将极耳12引导至极片主体11沿第二方向Y的一侧，并使极耳12和极片主体11在第三方向Z上不重叠，减小极耳12相对于极片主体11弯折的角度。
在一些实施例中，第一边缘211a和第二边缘211b均平行于第二方向Y且分别位于第三边缘211c相反的两侧。
第二边缘211b相对于第一边缘211a绕第三边缘211c旋转的角度α为180°，第一边缘211a、第二边缘211b、第三边缘211c以及第四边缘211d围成的整形面211可以用于对大角度回折的极耳12进行整形，能 够实现极耳12的180°翻转。
在一些实施例中，整形面211的靠近第一边缘211a的部分背向极片主体11，整形面211的靠近第二边缘211b的部分面向极片主体11。
在一些实施例中，极耳12在展平状态下沿第二方向Y的尺寸为H1，第一边缘211a的尺寸为H2，第二边缘211b的尺寸为H3，H1、H2和H3满足：H2≥H1，H3≥H1。
展平状态指的是极耳12相对于极片主体11弯折的角度β为0°的状态。
在第二方向Y上，第一边缘211a相对于极耳12具有较大的尺寸，当极耳12经过第一边缘211a时，如果极耳12与第一边缘211a接触，第一边缘211a可以支撑极耳12，以有效地引导极耳12进入整形面211。在第二方向Y上，第二边缘211b相对于极耳12具有较大的尺寸，当极耳12经由第二边缘211b离开整形面211时，第二边缘211b可以对极耳12整体进行整形，以改善极耳12的整形效果。
在一些实施例中，H2大于H1。示例性地，H2＝H1+5mm。
在一些实施例中，H3大于H1。示例性地，H3＝H1+5mm。
在一些实施例中，在第二方向Y上，第三边缘211c和极片主体11的引出极耳12的端部之间的间距为H4，H4为0.5mm-10mm。
在极片1的走带过程中，极片1可能会在第二方向Y上出现偏差。如果H4过小，那么极耳整形装置2的位于第三边缘211c周围的部分可能会因为极片1的偏差而挤压极耳12的根部，引发极耳12损伤的风险。鉴于此，发明人使H4的值大于或等于0.5mm，以降低极耳12损伤风险，提高安全性。
H4的值越大，整形面211在第二方向Y上与极耳12的的间距也越大。如果H4过大，那么极耳12和整形面211的接触面积偏小，甚至不与整形面211接触，这样会影响极耳12的整形效果。鉴于此，发明人使H4的值小于或等于10mm，以改善极耳12的整形效果。
可选地，H4为0.5mm、1mm、2mm、4mm、5mm、8mm或10mm。
在一些实施例中，H4为1mm-5mm。
图7为图3所示的极耳整形装置2的正视示意图；图8为本申请一些实施例提供的极耳整形装置2的整形构件21和引导构件22的结构示意图；图9为图8所示的整形构件21的结构示意图；图10为图8所示的整形构件21和引导构件22在另一角度下的结构示意图。
如图7至图10所示，在一些实施例中，极耳整形装置2包括整形构件21和引导构件22。整形构件21具有整形面211，整形面211沿第一方向X的两端具有第一边缘211a和第二边缘211b。引导构件22连接于整形构件21，在第一方向X上，引导构件22的至少部分凸出于第一边缘211a。
极片1可以沿第一方向X经过整形构件21。在极片1的走带过程中，极片1先经过第一边缘211a，再经过第二边缘211b。
第一边缘211a和第二边缘211b分别位于整形面211沿第一方向X的两端。示例性地，第一边缘211a沿垂直于第一方向X的方向延伸，第二方向Y沿垂直于第一方向X的方向延伸。
引导构件22和整形构件21可以是一体式结构，也可是分体式结构。示例性地，引导构件22和整形构件21为分开提供的两个构件，两者通过粘接、卡接、熔接或其它方式连接。
引导构件22可用于引导极耳12与整形面211接触。
在装配极耳整形装置2时，使第一边缘211a和第二边缘211b的布置方向与极片1的走带方向相反，在极片1走带的过程中，如果极耳12回折到极片主体11上，引导构件22可以插入到极耳12和极片主体11之间，以将极耳12铲起并引导极耳12与整形面211接触，从而改善极耳12的整形效果，降低极耳12损伤的风险。
在一些实施例中，整形构件21还具有用于面向极片1的第一表面212，整形面211与第一表面212相交，且两者之间的交线包括第一边缘211a和第二边缘211b。引导构件22包括连接部221和引导部222，连接部221附接于第一表面212，在第一方向X上，引导部222凸出于第一表面212。
第一表面212用于面向极片主体11。引导构件22位于整形构件21的面向极片主体11的一侧。
第一表面212可以是平面，也可以是曲面。可选地，第一表面212为平面。
附接是指贴附连接，示例性地，连接部221可通过粘接、吸附、嵌合或其它方式附接于第一表面212。可选地，连接部221可粘接于第一表面212。
引导部222在第一方向X上凸出于第一表面212，其未附接到第一表面212。
连接部221可以覆盖第一表面212的一部分，也可以完全覆盖第一表面212。
引导部222可用于插入到极耳12和极片主体11之间，以将极耳12铲起并引导极耳12与整形面211接触，从而改善极耳12的整形效果，降低极耳12损伤的风险。引导构件22的连接部221连接到整形构件21，当引导部222经过多次使用后出现磨损时，直接更换引导构件22即可，无需更换整形构件21。
在一些实施例中，第一表面212为平面。当极耳12经过第一表面212时，第一表面212可以将极耳12导正。
在一些实施例中，连接部221粘接于第一表面212。
在一些实施例中，连接部221完全覆盖第一表面212。当极耳12经由第二边缘211b离开整形面211时，连接部221可以将第一表面212和极耳12隔开，降低第一表面212与极耳12摩擦的风险。
在一些实施例中，引导构件22的弹性模量小于整形构件21的弹性模量。弹性模量指的是杨氏模量。
相对于整形构件21，引导构件22具有较好的弹性；当引导构件22插入极耳12和极片主体11之间并铲起极耳12时，极耳12不易被具有较好弹性的引导构件22损伤。
在一些实施例中，引导构件22可由柔性材质制成。可选地，引导构件22为mylar片。
在一些实施例中，当极片1经过极耳整形装置2时，引导构件22与极片主体11间隔设置，这样可以避免引导构件22与极片主体11摩擦， 降低引导构件22和极片主体11磨损的风险。
在一些实施例中，极片主体11从引导构件22沿第三方向Z背离整形构件21的一侧经过。示例性地，当极片主体11经过引导构件22时，极片主体11和引导构件22在第三方向Z上的间距w满足：0＜w≤1mm。可选地，w为0.1mm、0.3mm、0.5mm、0.8mm或1mm。
在一些实施例中，引导构件22由非金属材质制成。当极耳12与引导构件22接触时，极耳12会与引导构件22摩擦。本申请实施例的引导构件22由非金属材质制成，这样可以减少摩擦产生的金属颗粒，降低金属颗粒掉落到极片主体11的风险，提高安全性。
在一些实施例中，整形构件21由非金属材质制成。
当极耳12经过整形面211并与整形面211接触时，极耳12会与整形构件21摩擦。本申请实施例的整形构件21由非金属材质制成，这样可以减少摩擦产生的金属颗粒，降低金属颗粒掉落到极片主体11的风险，提高安全性。
在一些可替代的实施例中，整形构件21包括金属基体和设置于金属基体表面的非金属层，非金属层形成整形面211。
非金属层可以通过电镀、机械镀、喷涂、热浸或其它工艺形成于金属基体的表面。
非金属层可以完全覆盖金属基体，也可以仅覆盖金属基体的一部分，只要与整形面211对应的部分为非金属层即可。
金属基体可以使整形构件21具有较高的强度，降低整形构件21的变形。当非金属层出现磨损时，只需修复非金属层即可，这样可以延长整形构件21的使用寿命。
可选地，非金属层还形成第一表面212。
图11为本申请一些实施例的极耳整形装置2的整形构件21、引导构件22和抚平构件23的结构示意图；图12为图3所示的极耳整形装置2的局部放大示意图；图13为图12所示的极耳整形装置2的剖视示意图。
如图11至图13所示，在一些实施例中，极耳整形装置2还包括抚平构件23，抚平构件23连接于整形构件21，在第一方向X上，抚平构 件23位于第二边缘211b的背离第一边缘211a的一侧，抚平构件23用于抚平经过整形面211之后的极耳12。
抚平构件23可通过卡接、焊接、紧固件连接或其它方式连接于整形构件21。
抚平构件23可以通过自身结构抚平极耳12，示例性地，抚平机构可包括相对设置的两个板，极耳12从两个板之间穿过时，两个板对极耳12进行抚平。可替代地，抚平构件23也可通过与其它结构配合来抚平极耳12，例如，抚平构件23可与用于引导极片1走带的辊轮配合，以抚平极耳12。
在极耳12经由第二边缘211b离开整形面211后，抚平构件23可以在极耳12行进的过程中约束极耳12，降低极耳12再次翻折的风险，进而对极耳12进行抚平，减少极耳12的褶皱，改善极耳12的形态。
在一些实施例中，抚平构件23的至少部分为圆弧形。抚平构件23的呈圆弧形的部分可用于与传动极片1的辊轮配合，以抚平极耳12。
在一些实施例中，抚平构件23的用于抚平极耳12的表面为非金属材质，以降低抚平构件23和极耳12摩擦产生金属颗粒的风险。
在一些示例中，抚平构件23整体由非金属材质制成。在一些替代的示例中，抚平构件23包括金属基体和设置于金属基体表面的非金属层，非金属层用于抚平极耳12。
在一些实施例中，极耳整形装置2还包括辊轮24，辊轮24用于引导极片1走带。整形构件21连接于辊轮24，抚平构件23用于抚平从辊轮24和抚平构件23之间穿过的极耳12。
辊轮24既可以引导极片1走带，还可与抚平构件23配合来抚平极耳12，这样可简化极耳整形装置2的结构。
在一些实施例中，辊轮24包括安装轴241和可转动地连接于安装轴241的辊筒242，辊筒242用于引导极片1走带。极耳整形装置2还包括固定构件25，连接于整形构件21和安装轴241，以将整形构件21固定于安装轴241。
本实施例通过设置固定构件25来实现整形构件21的安装和固定， 以提高整形构件21的稳定性，简化极耳整形装置2的整体结构。
在另一些可替代地实施例中，极耳整形装置2也可省去辊轮24、固定构件25等结构，这样，极耳整形装置2具有较小的体积和简单的结构，其可以根据需要方便地安装。
在一些实施例中，抚平构件23的呈圆弧形的部分所对应的包角可根据极耳12沿走带方向的尺寸确定，只要抚平构件23的呈圆弧形的部分能够完全覆盖极耳12即可。例如，如图13所示，抚平构件23的呈圆弧形的部分的包角可为60°-120°，可选地，抚平构件23的呈圆弧形的部分的包角可为90°。
图14为本申请一些实施例的极耳整形装置2的整形构件21、引导构件22和抚平构件23的结构示意图。如图14所示，抚平构件23的呈圆弧形的部分也可具有较大的包角。例如，抚平构件23的呈圆弧形的部分的包角可为120°-180°，可选地，抚平构件23的呈圆弧形的部分的包角可为150°。
图15为本申请另一些实施例的极耳整形装置2的简化示意图。
如图15所示，极耳整形装置2可设置为两个，两个极耳整形装置2可沿极片1的走带方向设置。一个极耳整形装置2用于对翻折到极片主体11的一侧的极耳12进行整形，另一个极耳整形装置2用于对翻折到极片主体11的另一侧的极耳12进行整形。
图16为本申请在一些实施例的极耳整形装置2的简化示意图。
如图16所示，极耳整形装置2可设置为两个，两个极耳整形装置2相对设置，极片主体11从两个极耳整形装置2之间穿过。一个极耳整形装置2用于对翻折到极片主体11的一侧的极耳12进行整形，另一个极耳整形装置2用于对翻折到极片主体11的另一侧的极耳12进行整形。
根据本申请的一些实施例，参照图3至图11，本申请提供了一种极耳整形装置2，其包括整形构件21、引导构件22、抚平构件23、辊轮24和固定构件25。辊轮24包括安装轴241和可转动地连接于安装轴241的辊筒242，辊筒242用于引导极片1走带。固定构件25连接于整形构件21和安装轴241，以将整形构件21固定于安装轴241。整形构件21设置在极 片1的走带路径上，其具有整形面211，整形面211被配置为：在相对于极片主体11弯折的极耳12经过整形面211时翻转极耳12，以减小极耳12相对于极片主体11弯折的角度。
整形面211包括第一边缘211a、第二边缘211b、第三边缘211c和第四边缘211d，第一边缘211a和第二边缘211b分别连接于第三边缘211c的两端并垂直于第三边缘211c，第四边缘211d连接于第一边缘211a背离第三边缘211c的一端和第二边缘211b背离第三边缘211c的一端。第二边缘211b相对于第一边缘211a绕第三边缘211c旋转的角度为α，α为180°。第三边缘211c平行于第一方向X。
引导构件22连接于整形构件21，在第一方向X上，引导构件22的至少部分凸出于第一边缘211a并用于引导极耳12与整形面211接触。抚平构件23连接于整形构件21，在第一方向X上，抚平构件23位于第二边缘211b的背离第一边缘211a的一侧，抚平构件23用于与辊筒242配合，以抚平从辊筒242和抚平构件23之间穿过的极耳12。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件，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 (23)

  1. 一种极耳整形装置，用于设置在极片的走带路径上，所述极片包括极片主体和从所述极片主体的端部引出的极耳，其中，所述极耳整形装置设有整形面，所述整形面被配置为：在相对于所述极片主体弯折的极耳经过所述整形面时翻转所述极耳，以减小所述极耳相对于所述极片主体弯折的角度。
  2. 根据权利要求1所述的极耳整形装置，其中，所述整形面包括螺旋面，所述螺旋面用于在相对于所述极片主体弯折的极耳经过所述螺旋面时翻转所述极耳。
  3. 根据权利要求1或2所述的极耳整形装置，其中，所述整形面包括第一边缘、第二边缘、第三边缘和第四边缘，所述第一边缘和所述第二边缘分别连接于所述第三边缘的两端并垂直于所述第三边缘，所述第四边缘连接于所述第一边缘背离所述第三边缘的一端和所述第二边缘背离所述第三边缘的一端；
    所述第二边缘相对于所述第一边缘绕所述第三边缘旋转的角度为α，α为60°-190°。
  4. 根据权利要求3所述的极耳整形装置，其中，α为175°-185°。
  5. 根据权利要求4所述的极耳整形装置，其中，α为180°。
  6. 根据权利要求3-5任一项所述的极耳整形装置，其中，
    所述第三边缘沿第一方向延伸，所述第一边缘和所述第二边缘分别设于所述整形面沿所述第一方向的两端；
    所述极耳从所述极片主体沿第二方向的端部引出，所述第一边缘平行于所述第二方向；在第三方向上，所述第一边缘的投影和所述第三边缘的投影均位于所述极片主体的投影内，所述第一方向、所述第二方向和所述第三方向两两垂直；
    在所述第二方向上，所述第二边缘的至少部分凸出于所述极片主体的引出所述极耳的端部。
  7. 根据权利要求6所述的极耳整形装置，其中，所述第一边缘和所述 第二边缘均平行于所述第二方向且分别位于所述第三边缘相反的两侧。
  8. 根据权利要求6或7所述的极耳整形装置，其中，所述极耳在展平状态下沿所述第二方向的尺寸为H1，所述第一边缘的尺寸为H2，所述第二边缘的尺寸为H3，H1、H2和H3满足：H2≥H1，H3≥H1。
  9. 根据权利要求8所述的极耳整形装置，其中，H1和H2满足：H2＝H1+5mm。
  10. 根据权利要求8或9所述的极耳整形装置，其中，H1和H3满足：H3＝H1+5mm。
  11. 根据权利要求6-10任一项所述的极耳整形装置，其中，在所述第二方向上，所述第三边缘和所述极片主体的引出所述极耳的端部之间的间距为H4，H4为0.5mm-10mm。
  12. 根据权利要求11所述的极耳整形装置，其中，H4为1mm-5mm。
  13. 根据权利要求1-12任一项所述的极耳整形装置，包括：
    整形构件，具有所述整形面，所述整形面沿第一方向的两端具有第一边缘和第二边缘；
    引导构件，连接于所述整形构件，在第一方向上，所述引导构件的至少部分凸出于所述第一边缘。
  14. 根据权利要求13所述的极耳整形装置，其中，所述极片主体用于从所述引导构件沿第三方向背离所述整形构件的一侧经过，所述第三方向垂直于所述第一方向；
    所述极片主体和所述引导构件在所述第三方向上的间距w满足：0＜w≤1mm。
  15. 根据权利要求13或14所述的极耳整形装置，其中，
    所述整形构件还具有用于面向所述极片的第一表面，所述整形面与所述第一表面相交，且两者之间的交线包括所述第一边缘和所述第二边缘；
    所述引导构件包括连接部和引导部，所述连接部附接于所述第一表面，在所述第一方向上，所述引导部凸出于所述第一表面。
  16. 根据权利要求15所述的极耳整形装置，其中，所述连接部完全覆盖所述第一表面。
  17. 根据权利要求13-16任一项所述的极耳整形装置，其中，所述引导构件的弹性模量小于所述整形构件的弹性模量。
  18. 根据权利要求13-17任一项所述的极耳整形装置，其中，所述整形构件由非金属材质制成。
  19. 根据权利要求13-17任一项所述的极耳整形装置，其中，所述整形构件包括金属基体和设置于所述金属基体表面的非金属层，所述非金属层形成所述整形面。
  20. 根据权利要求13-19任一项所述的极耳整形装置，还包括抚平构件，所述抚平构件连接于所述整形构件，在所述第一方向上，所述抚平构件位于所述第二边缘的背离所述第一边缘的一侧，所述抚平构件用于抚平经过所述整形面之后的所述极耳。
  21. 根据权利要求20所述的极耳整形装置，其中，所述抚平构件的至少部分为圆弧形。
  22. 根据权利要求20或21所述的极耳整形装置，还包括辊轮，所述辊轮用于引导所述极片走带；
    所述整形构件连接于所述辊轮，所述抚平构件用于抚平从所述辊轮和所述抚平构件之间穿过的所述极耳。
  23. 根据权利要求22所述的极耳整形装置，其中，
    所述辊轮包括安装轴和可转动地连接于所述安装轴的辊筒，所述辊筒用于引导所述极片走带；
    所述极耳整形装置还包括固定构件，连接于所述整形构件和所述安装轴，以将所述整形构件固定于所述安装轴。
PCT/CN2023/095612 2022-05-27 2023-05-22 极耳整形装置 WO2023226944A1 (zh)

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