WO2024060741A1 - 切断装置及电池流水线生产设备 - Google Patents

切断装置及电池流水线生产设备 Download PDF

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Publication number
WO2024060741A1
WO2024060741A1 PCT/CN2023/102573 CN2023102573W WO2024060741A1 WO 2024060741 A1 WO2024060741 A1 WO 2024060741A1 CN 2023102573 W CN2023102573 W CN 2023102573W WO 2024060741 A1 WO2024060741 A1 WO 2024060741A1
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WO
WIPO (PCT)
Prior art keywords
cutting
pole piece
support member
rolling
support
Prior art date
Application number
PCT/CN2023/102573
Other languages
English (en)
French (fr)
Inventor
李晨
季鹏凯
王永磊
高尚
Original Assignee
江苏时代新能源科技有限公司
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 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Publication of WO2024060741A1 publication Critical patent/WO2024060741A1/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
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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, and in particular to a cutting device and battery assembly line production equipment.
  • the separator needs to be cut off. During this process, the problem of pole piece wrinkles may easily occur.
  • embodiments of the present application provide a cutting device and battery assembly line production equipment, which can alleviate the problem of pole piece wrinkles caused by cutting off the separator during the winding process of the battery core.
  • the present application provides a cutting device for an electric core.
  • the electric core includes a first pole piece, a second pole piece, and a separator for separating the first pole piece and the second pole piece.
  • the cutting device includes a cutting mechanism for cutting off the isolation member and a support member connected to the cutting mechanism.
  • the cutting mechanism is in the cutting position, and the supporting member can provide supporting force to support the target pole piece.
  • the target pole piece is the pole piece located on the inside of the first pole piece and the second pole piece before the material is fed and rolled.
  • the support member can provide support force acting on the target pole piece, and then in isolation
  • the target pole piece can be supported by the support member to avoid skewing due to the rebound of the separator, thereby mitigating the problem of cutting off the separator during the winding process of the battery core.
  • the resulting problem of pole piece wrinkles reduces the risk of defects inside the battery.
  • the cutting mechanism is in the cutting position, and the support member can provide a supporting force to support the feeding head end of the target pole piece.
  • the support member can provide a supporting force to support the feeding head end of the target pole piece.
  • the support member includes a support surface for supporting the target pole piece; the support surface is configured to support at least part of the target pole piece in a width direction of the target pole piece.
  • the support surface By configuring the support surface to support the target pole piece in the width direction of the target pole piece, the support area of the support member supporting the target pole piece can be increased, making the support member more effective in supporting the target pole piece.
  • the size of the supporting surface in the width direction is greater than or equal to the width of the target pole piece. In this way, make The target pole piece can be supported by the support surface in the width direction, which can further realize the effective support of the target pole piece by the support member.
  • the support surface is configured as a planar surface.
  • the contact area between the support surface and the target pole piece can be further increased, and can be adapted to the shape of the target pole piece to achieve more stable support for the target pole piece.
  • the support surface has a surface roughness of less than 5 microns. In this way, by limiting the surface roughness of the support surface, the friction force generated between the support member and the target pole piece can be reduced when the target pole piece is fed, and the support member can be prevented from damaging the target pole piece.
  • the cutting mechanism includes a cutting member for cutting the isolation member at a cutting position; and a driving device drivingly connecting the cutting member.
  • the driving device is used to drive the cutting piece to move to the cutting position.
  • the supporting part is connected to the cutting part. Since the cutting mechanism includes a cutting piece and a driving device, and the supporting piece is connected to the cutting piece, when the driving device drives the cutting piece to move to the cutting position, the supporting piece can be driven by the cutting piece to move close to the cutting position. Location. Therefore, the support member can support the target pole piece in the area near the cutting position, which can further improve the stability of feeding the target pole piece.
  • the cutting device further includes a first adjustment device; the first adjustment device is connected between the support member and the cutting member, and is used to adjust the position of the support member relative to the target pole piece in the width direction of the target pole piece. Location. In this way, by providing the first adjustment device, the support member can be adjusted in the width direction of the target pole piece.
  • the first adjustment device includes a first mounting member and a fixing member; the first mounting member is connected to the support member, and the first mounting member is detachably connected to the cutting mechanism by means of the fixing member. In this way, by detachably connecting the first mounting member to the cutting mechanism, it is convenient to adjust the position of the first mounting member relative to the cutting mechanism, thereby adjusting the position of the support member connected to the first mounting member.
  • the cutting device further includes a second adjustment device; the second adjustment device is connected between the support member and the first adjustment device so that the support member can rotate around an axis; wherein the axis is consistent with the width of the target pole piece.
  • the width directions are parallel to each other.
  • the second adjustment device includes: a second mounting member connected to the first adjustment device; a rotational connection member, the support member is rotatably connected to the second installation member about the axis by means of the rotational connection member; and detachably connected to the second installation member.
  • the fixed connection piece between the mounting piece and the supporting piece. By arranging the rotary connecting piece, the supporting piece can be rotatably connected to the second mounting piece around the axis. At the same time, by providing a detachable fixed connection piece, when the support member rotates to a required angle relative to the second mounting member, the fixed connection piece can be used to fix the support member after rotating at a required angle.
  • the second mounting part is provided with a guide hole;
  • the fixed connection part includes an insert part and a fastener; one end of the insert part is connected to the support part, and the other end is inserted into the guide hole, and the fastener is detachably connected
  • the other end of the insert is positioned in the guide hole;
  • the guide hole is configured as an arc hole, and the arc center of the guide hole is located on the axis. Since the arc center of the guide hole is located on the axis, when the support member rotates around the axis relative to the second mounting member, the insert member connected to the support member can cooperate with the guide hole and be fixed by the fastener.
  • the slicing member includes a resistive heat cutter or a heating wire heat cutter. In this way, you can choose a resistive hot-heating knife or an electric heating-type hot-heating knife, and use the heat generated by the hot-heating knife to cut off the isolation member.
  • the present application provides a battery assembly line production equipment, including: a winding needle and a winding needle arranged sequentially along the feeding direction of the separator; and the cutting device in the above embodiment.
  • the slitting mechanism is used to cut off the spacer between the winding needle and the winding needle;
  • the target pole piece is the first pole piece and the second pole piece that are to be lifted before the material is fed to the winding needle.
  • the pole piece on the inside of the roll, the inside to be rolled is the side closer to the rolling needle.
  • the support member is used to support the feed material to the winding needle and closer to the target of the winding needle.
  • the pole piece enables the target pole piece to be fed more smoothly to the winding needle, thereby mitigating the problem of pole piece wrinkles caused by cutting off the separator during the winding process of the battery core, and reducing the risk of defects inside the battery.
  • the cutting mechanism is in the cutting position, and there is a preset gap between the support member and the winding needle along the direction in which the support member supports the target pole piece.
  • the battery assembly line production equipment further includes a first rolling element connected to the slitting mechanism, and a second rolling element arranged between the winding needle and the winding needle; the slitting mechanism is in the cutting position.
  • the first rolling element can form a limiting space with the second rolling element, and the limiting space is used to limit the spacer between the winding needle and the winding needle.
  • the first rolling element and the second rolling element can be used to limit the spacer between the winding needle and the winding needle, so as to avoid damaging the winding needle when the spacer is cut off.
  • the battery assembly line production equipment further includes a first elastic member connected between the first rolling member and the cutting mechanism; the cutting mechanism is in the cutting position, and the first rolling member can rely on the elastic force of the first elastic member Press against the spacer. In this way, by arranging the first elastic member, the process of the first rolling member pressing the spacer located on the winding needle is more flexible, thereby reducing damage to the spacer located on the winding needle.
  • first rolling elements there are multiple first rolling elements and multiple second rolling elements, all second rolling elements are spaced apart along the feeding direction of the separator, and all first rolling elements correspond to all second rolling elements one-to-one. .
  • all second rolling elements are spaced apart along the feeding direction of the separator, and all first rolling elements correspond to all second rolling elements one-to-one.
  • the surface of the first rolling element and/or the second rolling element is provided with an elastic layer.
  • an elastic layer By arranging an elastic layer on the surface of the first rolling element and/or the second rolling element, the elasticity of the elastic layer can prevent the isolating element from being damaged when the rolling element presses the isolating element.
  • the diameter of the first rolling element and/or the second rolling element is 5 mm to 40 mm. In this way, the diameter of the first rolling element and/or the second rolling element can be set correspondingly according to the size of the battery core wound on the winding needle, so as to better limit the position between the winding needle and the winding needle. Spacers between rolling pins.
  • the support member when the cutting mechanism is in the cutting position and the isolation member is cut off, the support member can Provide support for the target pole piece, thereby enabling the target pole piece to avoid skewing due to the rebound of the separator under the support of the support member, thereby mitigating the polarization caused by cutting off the separator during the winding process of the battery core. It eliminates the problem of sheet wrinkles and reduces the risk of defects inside the battery.
  • Figure 1 is a schematic structural diagram of a needle rolling assembly in a first state provided by some embodiments of the related art
  • Figure 2 is a schematic structural diagram of the needle rolling assembly in the second state provided by some embodiments of the related art
  • FIG3 is a schematic diagram of the structure of a cutting device at a viewing angle in some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of the cutting mechanism from another perspective in some embodiments of the present application.
  • Figure 5 is a schematic structural diagram of the cooperation between the cutting device and the rolling needle assembly in some embodiments of the present application.
  • Figure 6 is a schematic structural diagram of the support member from one perspective in some embodiments of the present application.
  • FIG7 is a schematic structural diagram of the cooperation between the support member and the target pole piece in another viewing angle in some embodiments of the present application.
  • Figure 8 is a schematic structural diagram of the cooperation between the support member and the second adjustment device in some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present 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. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • Figure 1 is a schematic structural diagram of a needle rolling assembly in a first state according to some embodiments of the related art
  • Figure 2 is a schematic structural diagram of a needle rolling assembly in a second state provided by some embodiments of the related art.
  • the winding needle assembly is used in the winding process of the battery core.
  • the rolling needle assembly includes a first rolling needle A1, a second rolling needle A2, a third rolling needle A3 and a rotating member B for driving the first rolling needle A1, the second rolling needle A2 and the third rolling needle A3 to rotate.
  • the rotating member B is provided with a connecting bottom plate C, and the first winding needle A1, the second winding needle A2 and the third winding needle A3 are arranged on the connecting bottom plate C around the rotating member B.
  • the first rolling needle A1, the second rolling needle A2 and the third rolling needle A3 are rotatably connected to the connecting base plate C respectively.
  • the rolling needle assembly is in the first state, the first rolling needle A1 is located in the first position and is in the winding state, the second rolling needle A2 is located in the second position and is in the winding completed state, and the third rolling needle A3 It is located in the third position and is in the state of unloading the battery core.
  • the rolling needle assembly is in the second state, that is, after completing the winding of the first rolling needle A1, completing the winding of the second rolling needle A2, and completing the unloading of the third rolling needle A3, the rotating member B will drive the first volume needle A1 to flip from the first position to the second position, and the second The rolling needle A2 flips from the second position to the third position, and the third rolling needle A3 flips from the third position to the first position.
  • the first winding needle A1 located at the second position is in the unwinding state
  • the second winding needle A2 located at the second position is in the unwinding state
  • the third winding needle A3 located at the first position is in the unwound state.
  • the spacer p3 located between the first rolling needle A1 and the third rolling needle A3 needs to be cut off to complete the winding of the first rolling needle A1. This cycle is repeated to achieve the continuous winding process of the battery core.
  • the inventor of the present application noticed that, as shown in Figure 2, the two diaphragm members are rolled into the third winding needle A3 before the first pole piece p1 and the second pole piece p2.
  • the two diaphragm members are sequentially wound on the third rolling needle A3 and the second rolling needle A2 along the feeding direction. Since the spacer p3 is in a tensioned state, when the spacer p3 is cut off, the tension of the spacer p3 is released, causing the third winding needle A3 to reverse, causing the spacer p3 to rebound or flange.
  • the first pole piece p1 and the second pole piece p2 are fed into the third rolling needle A3 at the first position, the first pole located inside (that is, closer to the third rolling needle A3)
  • the piece p1 will be skewed due to the impact of the rebounding separator p3, which will affect the feeding process of the first pole piece p1, which will easily cause the problem of pole piece wrinkles, causing defects inside the battery and posing safety risks.
  • the first pole piece p1 is a positive pole piece and the second pole piece p2 is a negative pole piece, or the first pole piece p1 is a negative pole piece and the second pole piece p2 is a positive pole piece.
  • the inventor of the present application found that a supporting force can be provided that can act on the impacted pole piece to avoid the impact caused by the aforementioned impact.
  • the material being fed into the impacted pole piece is skewed.
  • the support member 200 that can move together with the cutting mechanism 100, when the cutting mechanism 100 cuts off the spacer p3, the support member 200 can be supported on the pole piece that will be hit by the spacer p3. In this way, the feeding process of the pole pieces can be made more stable, thereby alleviating the wrinkles of the pole pieces during the winding process of the battery core.
  • the inventor of the present application has conducted in-depth research and designed a cutting mechanism including a support member, so that the separator can be cut while cutting the separator.
  • the pole pieces provide support.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., which are not limited in the embodiments of the present application.
  • Battery cells may be cylindrical, flat, rectangular, or in other shapes, etc., which are not limited in the embodiments of the present application.
  • Battery cells may include cylindrical battery cells, square battery cells, etc. in terms of packaging, which are not limited in the embodiments of the present application.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of 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 that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that is coated with the positive electrode active material layer. Fluid, cathode current collector without coating of cathode active material layer As the positive pole.
  • the material of the positive electrode current collector can be aluminum, and 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 that is not coated with the negative electrode active material layer protrudes from the negative electrode collector that is coated with the negative electrode active material layer.
  • Fluid, the negative electrode current collector that is not coated with the negative electrode active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the isolation member may be configured in the form of an isolation membrane.
  • the isolation membrane may be made of PP (polypropylene, polypropylene), PE (polyethylene, polyethylene), or ceramics with a PVDF (polyvinylidene fluoride) coating.
  • the electrode assembly is composed of a wound battery core.
  • the wound battery core disclosed in the embodiment of the present application may be, but is not limited to, a cylinder, a flat body, or other shapes.
  • the cutting device disclosed in the embodiment of the present application can be, but is not limited to, used in the winding needle assembly shown in the above related art, and can also be used in the production process of electric cores, but is not limited to it.
  • Production equipment composed of the cutting device disclosed in the present application can be used on the battery production line. In this way, the wrinkles of the pole pieces can be alleviated, thereby facilitating the manufacture of batteries with superior safety performance.
  • Figure 3 is a schematic structural diagram of the cutting device 10 from one perspective in some embodiments of the present application
  • Figure 4 is a schematic diagram of the cutting mechanism from another perspective in some embodiments of the present application.
  • the angle of view in Figure 3 is a front view
  • the angle of view in Figure 4 is a top view.
  • FIG. 3 illustrates the first rolling member 40 and the first elastic member 60 shown later. The diagrams shown below will not be described again.
  • the battery core includes a first pole piece p1, a second pole piece p2, and a separator p3 for separating the first pole piece p1 and the second pole piece p2.
  • the cutting device 10 includes a cutting mechanism 100 and a support 200 .
  • the cutting mechanism 100 is used to cut off the isolation member p3, and the support member 200 is connected to the cutting mechanism 100.
  • the cutting mechanism 100 is in the cutting position, and the supporting member 200 can provide supporting force to support the target pole piece p0.
  • the target pole piece p0 is the pole piece located on the inside of the first pole piece p1 and the second pole piece p2 before the material is rolled up.
  • the first pole piece p1 and the second pole piece p2 are the positive pole piece and the negative pole piece used to form the battery core.
  • the first pole piece p1 can be the positive pole piece
  • the second pole piece p2 can be the negative pole piece, or
  • the first pole piece p1 is the negative pole piece
  • the second pole piece p2 is the positive pole piece.
  • the separator p3 is a member for separating the first pole piece p1 and the second pole piece p2.
  • the isolation member p3 may be in the structural form of the isolation film mentioned above, which will not be described again here.
  • the cutting mechanism 100 is a mechanism for cutting the spacer p3. That is to say, the cutting mechanism 100 can cause the spacer p3 to be cut and divided into different parts.
  • the cutting mechanism 100 may be a mechanism that provides a cutting force acting on the spacer p3 to cut the spacer p3 into different parts, or may be a mechanism that can melt the spacer p3 into different parts, or other types of mechanisms. The selection can be made according to actual usage conditions, and the embodiments of this application do not specifically limit this.
  • the support member 200 is a member capable of supporting the target pole piece p0. Since the support member 200 is connected to the slitting machine structure 100, the support member 200 will move driven by the cutting mechanism 100. When the cutting mechanism 100 is in the cutting position, the support member 200 will also move to a position that can support the target pole piece p0. At this time, the support member 200 can provide a supporting force to support the target pole piece p0.
  • the target pole piece p0 is the aforementioned pole piece that is hit, that is, the pole piece located on the inside of the first pole piece p1 and the second pole piece p2 before being rolled up.
  • FIG. 5 is a schematic structural diagram of the cooperation between the cutting device 10 and the rolling needle assembly in some embodiments of the present application. Before feeding material and rolling, it refers to the process in which the third rolling needle A3 in the rolling needle assembly is in the state of waiting for rolling, and the first pole piece p1 and the second pole piece p2 have not yet been fed to the third rolling needle A3.
  • the pole piece located inside to be rolled refers to the side closer to the third rolling needle A3 before the first pole piece p1 and the second pole piece p2 are fed to the third rolling needle A3.
  • Figure 5 illustrates the situation where the first pole piece p1 is closer to the third winding needle A3, that is, the first pole piece p1 is the target pole piece p0. After the first pole piece p1 and the second pole piece p2 are fed into the third winding needle A3, for the first pole piece p1 of the first turn and the second pole piece p2 of the first turn, the first pole piece p1 of the first turn It is closer to the third coil needle A3 than the second pole piece p2 of the first turn.
  • the support member 200 can support the first pole piece p1 on the feeding path of the first pole piece p1.
  • the third winding needle A3 is reversed due to the tension released by the isolating member p3, and the isolating member p3 being fed into the third winding needle A3 rebounds or flanging occurs.
  • the first pole piece p1 closer to the third winding needle A3 will be hit by the rebounding or flanging isolating member p3.
  • the first pole piece p1 Under the action of the support member 200, the first pole piece p1 can be prevented from being skewed, so that the first pole piece p1 can be fed into the third winding needle A3 in a more stable posture.
  • the support member 200 can provide a supporting force acting on the target pole piece p0, and then in isolation
  • the target pole piece p0 can avoid skewing due to the rebound or flipping of the isolation piece p3 under the support of the support member 200, thereby alleviating the winding of the battery core.
  • the problem of pole piece wrinkles caused by cutting off the separator p3 during the winding process reduces the risk of defects inside the battery.
  • the cutting mechanism 100 is in the cutting position, and the support member 200 can provide a supporting force to support the feeding head end of the target pole piece p0.
  • the inventor of the present application further noticed that the impact of the impact of the spacer p3 on the target pole piece p0 will be greater at a position closer to the feed end of the target pole piece p0.
  • the feeding head end of the first pole piece p1 is the end closer to the third coil needle A3.
  • the feeding head end of the first pole piece p1 receives a greater impact force from the spacer p3. More prone to skew.
  • the supporting force can be provided at the first feeding end of the target pole piece p0, so that the supporting force of the support member 200 can act on the feeding first end of the target pole piece p0, which can better avoid the occurrence of the feeding of the target pole piece p0. Skewed situation.
  • FIG. 6 is a schematic structural diagram of the support member 200 from one perspective in some embodiments of the present application.
  • the support member 200 includes a support surface m1 for supporting the target pole piece p0.
  • the support surface m1 is configured to support at least part of the target pole piece p0 in the width direction F1 of the target pole piece p0.
  • the support member 200 may include a support body 210, and the support body 210 may be configured as a plate-like structure, with a support surface m1 is formed on one surface of the support body 210 .
  • FIG. 5 as an example, the support member 200 supports the first pole piece p1 by means of the support surface m1.
  • the support surface m1 to support the target pole piece p0 in the width direction F1 of the target pole piece p0, the area of the support surface m1 of the support member 200 that supports the target pole piece p0 can be increased, so that the support member 200 can be positioned for the target pole piece p0.
  • the support of slice p0 is more effective.
  • the target pole piece p0 since the target pole piece p0 is supported in the form of surface contact, on the one hand, the feeding process of the target pole piece p0 can be guided; on the other hand, it can also enable the target pole piece p0 to be fed before feeding. Be soothed. That is to say, the stability of feeding the target pole piece p0 can be further improved, and quality problems such as folding and wrinkles of the target pole piece p0 can be avoided.
  • FIG. 7 shows the structure of the support member 200 matching the target pole piece p0 from another perspective in some embodiments of the present application. Schematic diagram. The dimension L of the support surface m1 in the width direction F1 is greater than or equal to the width W of the target pole piece p0.
  • the target pole piece p0 can be supported by the support surface m1 in the width direction F1, and the support member 200 can further effectively support the target pole piece p0.
  • the support surface m1 is configured as a plane.
  • the contact area between the support surface m1 and the target pole piece p0 can be further increased, and can be adapted to the shape of the target pole piece p0, thereby achieving more stable support for the target pole piece p0 .
  • the surface roughness of the supporting surface m1 is less than 5 microns.
  • the friction force generated between the support member 200 and the target pole piece p0 can be reduced when the target pole piece p0 is fed, and the support member 200 can be prevented from damaging the target pole piece p0. .
  • the support 200 also includes an auxiliary surface m2 connected to the support surface m1.
  • the auxiliary surface m2 can be disposed on the support surface. m1 along both sides of the feeding direction of the target pole piece p0.
  • the auxiliary surface m2 is inclined relative to the support surface m1, and the auxiliary surface m2 is configured as an arc surface and is smoothly connected to the support surface m1.
  • the auxiliary surface m2 can be provided to assist the feeding process of the target pole piece p0 when the support surface m1 is supported on the target pole piece p0, thereby further reducing the friction force generated between the support member 200 and the target pole piece p0, thereby Reduce the damage of the support member 200 to the target pole piece p0.
  • the cutting mechanism 100 includes a cutting member 110 and a driving device 120 .
  • the cutting member 110 is used to cut off the spacer p3 at the cutting position.
  • the driving device 120 is drivingly connected to the cutting member 110 and is used to drive the cutting member 110 to move to the cutting position.
  • the supporting member 200 is connected to the cutting member 110 .
  • the cutting mechanism 100 includes a cutting member 110 and a driving device 120, and the supporting member 200 is connected to the cutting member 110, when the driving device 120 drives the cutting member 110 to move to the cutting position, the supporting member 200 can move on the cutting member 110. Driven by Move closer to the cutoff position. That is to say, the support member 200 and the cutting member 110 can move together under the driving of the driving device 120 .
  • FIG. 5 when the cutting member 110 moves to the cutting position, the area near the cutting member 110 is limited. In a limited space, by directly connecting the support member 200 to the cutting member 110, a power mechanism solely used to drive the support member 200 can be omitted. In this way, the area near the cutting position that is difficult to reach due to limited space can be avoided. Support 200 is used. Therefore, the support member 200 can support the target pole piece p0 in the area near the cutting position, which can further improve the smoothness of feeding the target pole piece p0.
  • the driving device 120 includes a driving motor 121 and a transmission member 122 .
  • the output end of the driving motor 121 is drivingly connected to one end of the transmission member 122
  • the other end of the transmission member 122 is drivingly connected to the cutting member 110 .
  • drive devices such as linear cylinders can also be used.
  • the embodiment of the present application does not impose specific limitations on this.
  • the structural form of the driving device 120 can be flexibly set according to actual usage conditions, as long as it can meet the usage requirements.
  • the slicing mechanism 100 further includes a third mounting member 130 , a rod member 140 and a second elastic member 150 .
  • the third mounting member 130 is connected to the driving end of the driving device 120 (ie, the other end of the transmission member 122 in some of the aforementioned embodiments).
  • the second elastic member 150 is connected between the cutting member 110 and the third mounting member 130 .
  • the rod member 140 passes through the second elastic member 150 and is fixed on the third mounting member 130 .
  • the process of cutting the diaphragm member by the cutting member 110 can be made more flexible, and the rod 140 can be used to guide the expansion and contraction of the second elastic member 150, thus making the action process of the cutting member 110 More stable.
  • the cutting device 10 further includes a first adjusting device 300 .
  • the first adjustment device 300 is connected between the support member 200 and the cutting member 110 and is used to adjust the position of the support member 200 relative to the target pole piece p0 in the width direction F1 of the target pole piece p0.
  • the support member 200 can be adjusted in the width direction F1 of the target pole piece p0. That is to say, for target pole pieces p0 of different sizes and positions, the position of the support member 200 can also be adjusted through the first adjustment device 300, which can also improve the versatility of the device when used.
  • the first adjustment device 300 includes a first mounting part 310 and a fixing part 320 .
  • the first mounting component 310 is connected to the supporting component 200 , and the first mounting component 310 is detachably connected to the cutting mechanism 100 via the fixing component 320 .
  • the first mounting member 310 may be mounted on the third mounting member 130 in some of the aforementioned embodiments.
  • the first mounting member 310 can be configured to be slidably connected to the third mounting member 130 along the width direction F1 as shown in FIG. 4 , and then the first mounting member 310 is fixed to the on the third mounting piece 130 .
  • positioning holes arranged at intervals along the width direction F1 can be provided on the third mounting member 130 , and the fixing member 320 can cooperate with the positioning holes to fix the first mounting member 310 to the third mounting member. 130 on.
  • the fastener 320 may be a bolt assembly.
  • the first adjustment device can be realized 300 just adjusts the position of the support member 200 in the width direction F1, which is not specifically limited in the embodiment of the present application.
  • Figure 8 is a schematic structural diagram of the support member 200 and the second adjustment device 400 in some embodiments of the present application.
  • the cutting device 10 also A second adjustment device 400 is included.
  • the second adjustment device 400 is connected between the support member 200 and the first adjustment device 300 so that the support member 200 can rotate around an axis a.
  • the axis a and the width direction F1 of the target pole piece p0 are parallel to each other.
  • the second adjustment device 400 may be disposed on the first mounting member 310 in some of the foregoing embodiments.
  • the second adjustment device 400 includes a second mounting part 410 , a rotating connection part 420 and a fixed connection part 430 .
  • the second mounting part 410 is connected to the first adjusting device 300 .
  • the support member 200 is rotatably connected to the second mounting member 410 about the axis a by means of a rotary connection member 420.
  • the fixed connecting member 430 is detachably connected between the second mounting member 410 and the supporting member 200 .
  • the second mounting member 410 may be connected to the first mounting member 310 in some of the foregoing embodiments.
  • the support member 200 may be configured to include the support body 210 mentioned in some of the foregoing embodiments and a fourth mounting member 220 connected to the support body 210.
  • the fourth mounting member 220 is rotatably connected to the third mounting member 220 about the axis a by means of the rotary connection member 420.
  • the support member 200 can be rotatably connected to the second mounting member 410 about the axis a.
  • the fixed connector 430 can be used to fix the support member 200 after rotating to a required angle.
  • the second mounting member 410 is provided with a guide hole 411 .
  • the fixed connection 430 includes an insert 431 and a fastener 432 .
  • One end of the insert 431 is connected to the support member 200 , and the other end is inserted into the guide hole 411 .
  • the fastener 432 is detachably connected to the other end of the insert 431 to position the other end of the insert 431 in the guide hole 411 .
  • the guide hole 411 is configured as an arc hole, and the arc center of the guide hole 411 is located on the axis a.
  • the insert 431 may be configured as a screw structure
  • the fastener 432 may be configured as a nut structure mated with the insert 431 .
  • Scale lines may be provided around the guide hole 411 on the second mounting member 410 to easily indicate the adjustment angle.
  • the insert 431 connected to the support member 200 can cooperate with the guide hole 411 and pass through Fasteners 432 secure.
  • the cutting member 110 includes a resistive hot cutting knife or an electric heating wire hot cutting knife.
  • the cutting element 110 can be set as a resistive hot cutting knife, and when the cutting element 110 is in the cutting position, the cutting parameters of the cutting element 110 are configured such that the power-on voltage is 220V and the power-on time It is 0.03 seconds to 3.5 seconds, so that the temperature of the resistance wire in the cutting piece is controlled between 110°C and 380°C.
  • the cutting member 110 is energized within a short period of time from when the cutting member 110 is close to the isolating member p3 to when the isolating member p3 is fused.
  • the electrification time is short, so that the cutting member 110 heats up quickly and cools down quickly after the power is turned off. It improves safety performance and can be more efficient at the same time. Quickly cut off the spacer p3.
  • the temperature of the resistance wire can be appropriately adjusted according to the material and structure of the isolator p3, which is not specifically limited in the embodiment of the present application.
  • the present application provides a battery assembly line production equipment, including a winding needle 20, a winding needle 30, and the cutting device 10 in the above embodiment.
  • the winding needle 20 and the winding needle 30 are arranged sequentially along the feeding direction of the spacer p3.
  • the cutting mechanism 100 is used to cut the spacer p3 located between the winding needle 20 and the winding needle 30 .
  • the target pole piece p0 is the pole piece located on the inside of the first pole piece p1 and the second pole piece p2 before the material is fed to the winding needle 20, and the inside to be rolled is the one closer to the winding needle 20. side.
  • the third rolling needle A3 is the rolling needle 20
  • the first rolling needle A1 is the winding needle 30
  • the target pole piece p0 is the first pole piece.
  • the cutting mechanism 100 cuts the spacer p3 located between the take-up needle 20 and the take-up needle 30, and while cutting, the supporting member 200 is used to support the incoming material to the take-up needle 20 and closer to the take-up needle 20.
  • the target pole piece p0 of the winding needle 20 enables the target pole piece p0 to be fed into the winding needle 20 more smoothly, thereby alleviating the wrinkles of the pole piece caused by cutting the separator p3 during the winding process of the battery core. problem, reducing the risk of defects inside the battery.
  • the cutting mechanism 100 is in the cutting position.
  • the support member 200 supports the target pole piece p0, the support member 200 and the winding needle 20 (ie, as shown in Figure 5 ).
  • the preset gap d may be set to less than 2 mm.
  • the preset gap d can be 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.8 mm, etc.
  • the preset gap d is set according to actual usage conditions, and the embodiment of the present application does not impose specific restrictions on this.
  • the rebound or flipping caused by the isolation member p3 is more serious.
  • the position of the support member 200 is set to meet the support of the support member 200 for the target pole piece p0. That is, when the cutting mechanism 100 is in the cutting position, there can be a preset gap d between the support member 200 and the winding needle 20 .
  • the battery assembly line production equipment further includes a first rolling element 40 and a second rolling element 50 .
  • the first rolling element 40 is connected to the slitting mechanism 100
  • the second rolling element 50 is arranged between the winding needle 20 and the winding needle 30 .
  • the slitting mechanism 100 is in the cutting position, and the first rolling element 40 can form a limiting space with the second rolling element 50 , and the limiting space is used to space the spacer between the winding needle 20 and the winding needle 30 p3 limit.
  • the first rolling element 40 can be Connected to the third mounting member 130, the second rolling member 50 may be connected to the rotating member B via the mounting structure.
  • the rotating member B drives the first rolling needle A1, the second rolling needle A2 and the third rolling needle A3 to rotate, the second rolling member 50 also rotates accordingly.
  • the second rolling element 50 can meet the requirements of continuous production.
  • a limiting space can be formed between the first rolling element 40 and the corresponding second rolling element 50 . That is to say, the first rolling element 40 presses the spacer p3 against the corresponding rolling element, so that the spacer p3 between the first rolling needle A1 and the second rolling needle A2 is limited within the formed limiting space. Bit.
  • the spacer p3 located between the winding needle 20 and the winding needle 30 can be limited by the first rolling element 40 and the second rolling element 50 to avoid damaging the winding needle 30 when the spacer p3 is cut off. .
  • the battery assembly line production equipment further includes a first elastic member 60 .
  • the first elastic member 60 is connected between the first rolling member 40 and the cutting mechanism 100 .
  • the cutting mechanism 100 is in the cutting position, and the first rolling member 40 can be pressed against the isolation member p3 by the elastic force of the first elastic member 60 .
  • the process of the first rolling member 40 pressing the spacer p3 located on the winding needle 30 is more flexible, thereby reducing damage to the spacer p3 located on the winding needle 30 .
  • first rolling elements 40 and multiple second rolling elements 50 there are multiple first rolling elements 40 and multiple second rolling elements 50, and all the second rolling elements 50 are spaced apart along the feeding direction of the partition p3. , all the first rolling elements 40 correspond to all the second rolling elements 50 one-to-one.
  • FIGS. 3 and 5 it is shown that the first rolling element 40 is provided with two second rolling elements 50 corresponding to the first rolling element 40 (that is, at this time, located between the first rolling needle A1 and the second rolling element 50 ).
  • the case where two second rolling elements 50) are provided between the winding needles A2. It can be set according to the usage situation, and the embodiments of this application do not impose specific restrictions on this.
  • first rolling elements 40 and second rolling elements 50 By arranging a plurality of first rolling elements 40 and second rolling elements 50, it is convenient to limit the spacer p3 between the winding needle 20 and the winding needle 30, and further prevent the spacer p3 from being damaged when it is cut. Winding needle 30.
  • the surface of the first rolling element 40 and/or the second rolling element 50 is provided with an elastic layer.
  • the elastic layer is a layered structure that can produce elastic deformation and recover.
  • the elastic layer may be made of rubber, sponge or other elastic materials, which is not specifically limited in the embodiments of the present application.
  • the diameter of the first rolling member 40 and/or the second rolling member 50 is 5 mm to 40 mm.
  • the diameter of the first rolling member 40 and/or the second rolling member 50 can be 5 mm, 7 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm.
  • the diameter of the first rolling element 40 and/or the second rolling element 50 can be set correspondingly according to the size of the battery core wound on the winding needle 30, so as to better limit the position of the winding needle. 20 and the spacer p3 between the winding needle 30.
  • the rolling needle assembly can Providing the second rolling element 50, combined with the design of the structural form and layout of the first rolling element 40 and the second rolling element 50, when the isolating element p3 is cut off, the spacer p3 connected to the winding needle 30 can be Partial compression can avoid damage to the isolation piece p3, and can also make the overall structure more compact.
  • the cutting device 10 provided by the present application, by providing the support 200 connected to the cutting mechanism 100 and the first adjustment device 300 and the second adjustment device 400 for adjusting the support 200, it is possible to achieve The position of the support member 200 is adjusted according to the position of the target pole piece p0.
  • the support member 200 can provide a supporting force acting on the target pole piece p0, and then when the isolation piece p3 rebounds due to being cut and hits the target pole piece p0,
  • the target pole piece p0 can avoid distortion due to the rebound of the separator p3 under the support of the support member 200, thereby alleviating the problem of pole piece wrinkles caused by cutting the separator p3 during the winding process of the battery core, and reducing the battery life. Risk of internal defects.
  • the support member 200 is connected to the cutting member 110 of the cutting mechanism 100, it can be extended into the area near the winding needle 20 to feed the first end of the target pole piece p0 when the space is limited.
  • the support member 200 can move following the cutting member 110, only one driving device 120 can be used to realize the action process, which further increases the production speed and reduces the manufacturing cost. Therefore, for the battery assembly line production equipment using the cutting device 10, the battery assembly line production equipment can produce higher quality batteries.

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Abstract

本申请涉及电池生产设备技术领域，特别是涉及一种切断装置(10)及电池流水线生产设备。切断装置(10)至少包括切分机构(100)和支撑件(200)。通过设置与切分机构(100)相连接的支撑件(200)，在切分机构(100)处于切断位置而切断隔离件(p3)时，支撑件(200)能够提供作用于目标极片(p0)的支撑力，进而在隔离件(p3)因被切断产生回弹并撞击至目标极片(p0)时，目标极片(p0)能够在支撑件(200)的支撑下避免因隔离件(p3)的回弹而产生歪斜，从而能够缓解电芯的卷绕过程中因切断隔离件(p3)导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。

Description

切断装置及电池流水线生产设备
交叉引用
本申请引用于2022年09月23日递交的名称为“切断装置及电池流水线生产设备”的第202222532508.9号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电池生产设备技术领域，特别是涉及一种切断装置及电池流水线生产设备。
背景技术
在电芯的卷绕过程中，需要切断隔离件。在此过程中，容易出现极片褶皱的问题。
发明内容
基于此，本申请实施例提供一种切断装置及电池流水线生产设备，能够缓解电芯的卷绕过程中因切断隔离件导致的极片褶皱的问题。
第一方面，本申请提供了一种切断装置，用于电芯，电芯包括第一极片、第二极片以及用于分隔第一极片和第二极片的隔离件。切断装置包括用于切断隔离件的切分机构以及连接切分机构的支撑件。切分机构处于切断位置，支撑件能够提供支撑于目标极片的支撑力。其中，目标极片为入料起卷前的第一极片和第二极片中位于待起卷内侧的极片。
本申请实施例的技术方案中，通过设置与切分机构相连接的支撑件，在切分机构处于切断位置而切断隔离件时，支撑件能够提供作用于目标极片的支撑力，进而在隔离件因被切断产生回弹并撞击至目标极片时，目标极片能够在支撑件的支撑下避免因隔离件的回弹而产生歪斜，从而能够缓解电芯的卷绕过程中因切断隔离件导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。
在一些实施例中，切分机构处于切断位置，支撑件能够提供支撑于目标极片的入料首端的支撑力。通过在目标极片的入料首端提供支撑力，可以使得支撑件的支撑力作用于目标极片的入料首端，能够更好地避免发生目标极片入料歪斜的情况。
在一些实施例中，支撑件包括用于支撑目标极片的支撑面；支撑面构造为能够在目标极片的幅宽方向上支撑目标极片的至少部分。通过将支撑面构造为在目标极片的幅宽方向上支撑目标极片，可以增大支撑件支撑目标极片的支撑面积，使得支撑件对于目标极片的支撑更为有效。
在一些实施例中，支撑面在幅宽方向上的尺寸，大于等于目标极片的幅宽。如此，使 得目标极片在幅宽方向上能够被支撑面所支撑，可以更进一步实现支撑件对于目标极片的有效支撑。
在一些实施例中，支撑面构造为平面。通过构造为平面的支撑面，能够更进一步增大支撑面与目标极片的接触面积，且能够与目标极片的形状相适配，实现对于目标极片更为稳定地支撑。
在一些实施例中，支撑面的表面粗糙度小于5微米。如此，通过对于支撑面的表面粗糙度的限定，在目标极片入料时可以降低支撑件与目标极片之间产生的摩擦力，避免支撑件对目标极片产生损伤。
在一些实施例中，切分机构包括用于在切割位置切断隔离件的切分件；以及传动连接切分件的驱动装置。驱动装置用于驱动切分件移动至切断位置。其中，支撑件连接于切分件。由于切分机构包括切分件和驱动装置，而支撑件连接于切分件，在驱动装置驱动切分件移动至切断位置时，支撑件能够在切分件的带动下移动至靠近切断位置的位置。由此，支撑件可以在切断位置附近的区域对目标极片进行支撑，能够更进一步提高目标极片入料的平稳性。
在一些实施例中，切断装置还包括第一调节装置；第一调节装置连接于支撑件与切分件之间，用于调节在目标极片的幅宽方向上，支撑件相对目标极片的位置。如此，通过设置第一调节装置，可以在目标极片的幅宽方向上对支撑件进行调节。
在一些实施例中，第一调节装置包括第一安装件和固定件；第一安装件连接支撑件，且第一安装件借助固定件可拆卸连接切分机构。如此，通过第一安装件与切分机构可拆卸连接的方式，便于调节第一安装件相对于切分机构的位置，进而调节与第一安装件相连的支撑件的位置。
在一些实施例中，切断装置还包括第二调节装置；第二调节装置连接于支撑件与第一调节装置之间，以使支撑件能够绕一轴线转动；其中，轴线与目标极片的幅宽方向彼此平行。通过设置第二调节装置，便于对支撑件相对于目标极片的角度进行调节。
在一些实施例中，第二调节装置包括：连接第一调节装置的第二安装件；转动连接件，支撑件借助转动连接件绕轴线可转动连接于第二安装件；及可拆卸连接于第二安装件与支撑件之间的固定连接件。通过设置转动连接件，使得支撑件可以绕轴线可转动连接于第二安装件。同时，通过设置可拆卸的固定连接件，使得在支撑件相对于第二安装件转动所需要的角度时，能够借助固定连接件将转动所需要的角度后的支撑件固定。
在一些实施例中，第二安装件上设有导向孔；固定连接件包括插入件和紧固件；插入件的一端连接支撑件，另一端插设于导向孔内，紧固件可拆卸连接于插入件的另一端，以将插入件的另一端定位于导向孔内；其中，导向孔构造为弧形孔，且导向孔的弧心位于轴线上。由于导向孔的弧心位于轴线上，在支撑件绕轴线相对于第二安装件进行转动时，与支撑件相连接的插入件能够与导向孔相互配合，并通过紧固件进行固定。
在一些实施例中，切分件包括电阻式热切刀或电热丝式热切刀。如此，可以通过选择电阻式热切刀或者电热式热切刀，利用热切刀所产生的热量切断隔离件。
第二方面，本申请提供了一种电池流水线生产设备，包括：沿隔离件的入料方向依次布置起卷卷针和收卷卷针；及上述实施例中的切断装置。其中，切分机构用于切断位于起卷卷针和收卷卷针之间的隔离件；目标极片为入料至起卷卷针前的第一极片和第二极片中位于待起卷内侧的极片，待起卷内侧为更靠近起卷卷针的一侧。如此，通过在切分机构切断位于起卷卷针和收卷卷针之间的隔离件，并在切断的同时，借助支撑件支撑入料至起卷卷针且更靠近起卷卷针的目标极片，使得目标极片能够更平稳地入料至起卷卷针，从而能够缓解电芯的卷绕过程中因切断隔离件导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。
在一些实施例中，切分机构处于切断位置，沿支撑件支撑目标极片的方向上，支撑件与起卷卷针之间具有预设间隙。通过设置支撑件与切分机构之间的位置关系，在切分机构处于切断位置时，支撑件与起卷卷针之间能够具有预设间隙。如此，可以依据实际使用情况，对支撑件的位置进行设置，以满足支撑件对于目标极片的支撑。
在一些实施例中，电池流水线生产设备还包括与切分机构相连接的第一滚动件，以及布置于起卷卷针和收卷卷针之间的第二滚动件；切分机构处于切断位置，第一滚动件能够与第二滚动件之间形成限位空间，限位空间用于对在起卷卷针和收卷卷针之间的隔离件限位。如此，可以借助第一滚动件和第二滚动件对位于起卷卷针和收卷卷针之间的隔离件限位，避免隔离件被切断时损坏收卷卷针。
在一些实施例中，电池流水线生产设备还包括连接于第一滚动件与切分机构之间的第一弹性件；切分机构处于切断位置，第一滚动件能够借助第一弹性件的弹性力压紧于隔离件。如此，通过设置第一弹性件，使得第一滚动件压紧位于收卷卷针的隔离件的过程更为柔性，降低对于位于收卷卷针的隔离件的损坏。
在一些实施例中，第一滚动件和第二滚动件均设有多个，全部第二滚动件沿隔离件的入料方向间隔布置，全部第一滚动件与全部第二滚动件一一对应。如此，通过设置多个第一滚动件和第二滚动件，便于将位于起卷卷针和收卷卷针之间的隔离件进行限位，更进一步避免隔离件被切断时损坏收卷卷针。
在一些实施例中，第一滚动件和/或第二滚动件的表面设有弹性层。通过在第一滚动件和/或第二滚动件的表面设置弹性层，借助弹性层的弹性，能够避免滚动件压紧隔离件时使隔离件受损。
在一些实施例中，第一滚动件和/或第二滚动件的直径为5毫米至40毫米。如此，可以根据卷绕于收卷卷针上的电芯的大小，对应设置第一滚动件和/或第二滚动件的直径，以便于能够更好地限位位于起卷卷针和收卷卷针之间的隔离件。
本申请实施例的技术方案中，在切分机构处于切断位置而切断隔离件时，支撑件能够 提供作用于目标极片的支撑力，进而使得目标极片能够在支撑件的支撑下避免因隔离件的回弹而产生歪斜，从而能够缓解电芯的卷绕过程中因切断隔离件导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。
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：
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为相关技术一些实施例提供的卷针组件处于第一状态的结构示意图；
图2为相关技术一些实施例提供的卷针组件处于第二状态的结构示意图；
图3为本申请一些实施例中一个视角下切断装置的结构示意图；
图4为本申请一些实施例中另一个视角下切分机构的结构示意图；
图5为本申请一些实施例中切断装置与卷针组件相配合的结构示意图；
图6为本申请一些实施例中一个视角下支撑件的结构示意图；
图7为本申请一些实施例中另一视角下支撑件与目标极片相配合的结构示意图；
图8为本申请一些实施例中支撑件与第二调节装置相配合的结构示意图。
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。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
参阅图1和图2，图1为相关技术一些实施例提供的卷针组件处于第一状态的结构示意图，图2为相关技术一些实施例提供的卷针组件处于第二状态的结构示意图。卷针组件用于电芯的卷绕过程中。卷针组件包括第一卷针A1、第二卷针A2、第三卷针A3以及用于带动第一卷针A1、第二卷针A2和第三卷针A3翻转的转动件B。具体地，转动件B上设有连接底板C，第一卷针A1、第二卷针A2和第三卷针A3围绕转动件B设置于连接底板C上。第一卷针A1、第二卷针A2和第三卷针A3分别与连接底板C可转动连接。如图1所示，卷针组件处于第一状态，第一卷针A1位于第一位置且处于卷绕状态，第二卷针A2位于第二位置且处于收卷完成状态，第三卷针A3位于第三位置且处于对电芯的进行下料的状态。如图2所示，卷针组件处于第二状态，也即是完成第一卷针A1的卷绕、完成第二卷针A2的收卷、完成第三卷针A3的下料后，转动件B会带动第一卷针A1从第一位置翻转至第二位置，第二 卷针A2从第二位置翻转至第三位置，第三卷针A3从第三位置翻转至第一位置。此时，位于第二位置的第一卷针A1处于待收卷状态，位于第二位置的第二卷针A2处于待下料状态，位于第一位置的第三卷针A3处于未起卷状态。此时，需要切断位于第一卷针A1和第三卷针A3之间的隔离件p3，以完成第一卷针A1的收卷。如此来循环往复，实现电芯的连续性卷绕过程。
本申请发明人注意到，如图2所示，两个隔膜件是先于第一极片p1和第二极片p2入卷第三卷针A3的。两个隔膜件沿入料方向依次卷绕于第三卷针A3和第二卷针A2。由于隔离件p3处于张紧状态，在切断隔离件p3时会因隔离件p3的张力释放而导致第三卷针A3倒转，进而使得隔离件p3产生回弹，亦或是翻边。此时，在第一极片p1和第二极片p2入料至位于第一位置的第三卷针A3的过程中时，位于内侧(也即更靠近第三卷针A3)的第一极片p1会因回弹的隔离件p3的撞击而歪斜，进而影响第一极片p1的入料过程，从而容易产生极片褶皱的问题，使得电池内部产生缺陷，存在安全隐患。可以理解的是，第一极片p1是正极极片，第二极片p2是负极极片，或者第一极片p1是负极极片，第二极片p2是正极极片。
为了避免极片入料时因回弹的隔离件p3的撞击而导致歪斜，本申请发明人研究发现，可以提供能够作用于被撞极片上的支撑力，以避免因前述所言的撞击而使被撞极片入料歪斜。具体地，可以通过可以跟随切分机构100一起运动的支撑件200，在切分机构100切断隔离件p3的同时，支撑件200可以支撑于会被隔离件p3撞击到的极片上。这样，可以使得极片的入料过程更加稳定，从而缓解电芯卷绕过程中产生极片褶皱。
基于以上考虑，为了缓解电芯卷绕过程中产生极片褶皱的问题，本申请发明人经过深入研究，设计了一种包含有支撑件的切分机构，使得在切割隔离件的同时，能够对极片产生支撑作用。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，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。电池单体按封装的方式可包括柱形电池单体、方形电池单体等，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，电极组件由正极极片、负极极片和隔离件组成。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，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体 作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，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，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离件可以设置为隔离膜的结构形式，隔离膜的材质可以为PP(polypropylene，聚丙烯)、PE(polyethylene，聚乙烯)或者具有PVDF(聚偏二氟乙烯)涂层的陶瓷等。需要说明的是，本申请实施例中电极组件由卷绕式的电芯构成。本申请实施例公开的卷绕形成的电芯可以但不限于是呈圆柱体、扁平体或其它形状。
本申请实施例公开的切断装置可以但不限用于上述相关技术中所示出的卷针组件中，同时也可以但不限用于电芯的生产过程中。可以使用具有本申请公开的切断装置组成的生产设备于电池生产流水线上，这样，可以缓解极片产生褶皱，进而便于制造得到安全性能更为优越的电池。
根据本申请的一些实施例，请参照图3和图4，图3为本申请一些实施例中一个视角下切断装置10的结构示意图，图4为本申请一些实施例中另一个视角下切分机构100的结构示意图。需要说明的是，图3中的视角为正视视角，图4中的视角为俯视视角。图3中示意出后文所示出的第一滚动件40和第一弹性件60。后文示意的图示不再赘述。
本申请提供了一种切断装置10，用于电芯。电芯包括第一极片p1、第二极片p2以及用于分隔第一极片p1和第二极片p2的隔离件p3。切断装置10包括切分机构100以及支撑件200。切分机构100用于切断隔离件p3，支撑件200连接切分机构100。切分机构100处于切断位置，支撑件200能够提供支撑于目标极片p0的支撑力。其中，目标极片p0为入料起卷前的第一极片p1和第二极片p2中位于待起卷内侧的极片。
第一极片p1和第二极片p2是用于构成电芯的正极极片和负极极片，第一极片p1可以是正极极片，第二极片p2可以是负极极片，或者，第一极片p1是负极极片，第二极片p2是正极极片。
隔离件p3是用于分隔第一极片p1和第二极片p2的构件。隔离件p3可以是前述所言的隔离膜的结构形式，在此不再赘述。
切分机构100是用于切断隔离件p3的机构。也就是说，切分机构100可以使得隔离件p3被切断且分为不同的部分。切分机构100可以是提供作用于隔离件p3的切分力而使隔离件p3切分为不同的部分的机构，也可以是可以使隔离件p3熔断为不同部分的机构或其他类型的机构。可以根据实际使用情况进行选择，本申请实施例对此不作具体限制。
支撑件200是能够对目标极片p0起到支撑作用的构件。由于支撑件200连接切分机 构100，支撑件200会在切分机构100的带动下进行移动。在切分机构100处于切断位置时，支撑件200也会移动至能够对目标极片p0进行支撑的位置，这时，支撑件200能够提供支撑于目标极片p0的支撑力。
目标极片p0是前述所言的被撞极片，也即是入料起卷前的第一极片p1和第二极片p2中位于待起卷内侧的极片。以前述的卷针组件为例，并参考图5，图5为本申请一些实施例中切断装置10与卷针组件相配合的结构示意图。入料起卷前指的是卷针组件中第三卷针A3处于待起卷状态，第一极片p1和第二极片p2还未入料至第三卷针A3的过程。位于待起卷内侧的极片指的是在第一极片p1和第二极片p2在入料至第三卷针A3前更靠近第三卷针A3的一侧。图5示意出第一极片p1更靠近第三卷针A3的情形，也即第一极片p1为目标极片p0。在第一极片p1和第二极片p2入料第三卷针A3后，对于首圈的第一极片p1和首圈的第二极片p2而言，首圈的第一极片p1较首圈的第二极片p2更靠近第三卷针A3。
继续以图5为例，在切分机构100处于切断位置时，支撑件200可以在第一极片p1的入料路径上对第一极片p1进行支撑。在第一卷针A1和第三卷针A3之间的隔离件p3被切断时，因为隔离件p3释放的张力使得第三卷针A3倒转，正在入料至第三卷针A3的隔离件p3产生回弹或者翻边。这时，更靠近第三卷针A3的第一极片p1会受到回弹或翻边的隔离件p3的撞击，在支撑件200的作用下，能够避免第一极片p1产生歪斜，使得第一极片p1能够以更为平稳的姿态入料至第三卷针A3。
由此，通过设置与切分机构100相连接的支撑件200，在切分机构100处于切断位置而切断隔离件p3时，支撑件200能够提供作用于目标极片p0的支撑力，进而在隔离件p3因被切断产生回弹并撞击至目标极片p0时，目标极片p0能够在支撑件200的支撑下避免因隔离件p3的回弹或翻转而产生歪斜，从而能够缓解电芯的卷绕过程中因切断隔离件p3导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。
根据本申请的一些实施例，请继续参照图3和图5，切分机构100处于切断位置，支撑件200能够提供支撑于目标极片p0的入料首端的支撑力。
本申请发明人更进一步注意到，在越靠近目标极片p0的入料首端的位置，目标极片p0所受到的隔离件p3的撞击的影响会更大。以图5为例，第一极片p1的入料首端也即是更靠近第三卷针A3的一端，第一极片p1的入料首端受到的隔离件p3的撞击力更大，更容易产生歪斜。如此，可以通过在目标极片p0的入料首端提供支撑力，可以使得支撑件200的支撑力作用于目标极片p0的入料首端，能够更好地避免发生目标极片p0入料歪斜的情况。
根据本申请的一些实施例，请参照图6，并结合参照图3和图5，图6为本申请一些实施例中一个视角下支撑件200的结构示意图。支撑件200包括用于支撑目标极片p0的支撑面m1。支撑面m1构造为能够在目标极片p0的幅宽方向F1上支撑目标极片p0的至少部分。举例来说，支撑件200可以包括支撑本体210，支撑本体210可以构造为板状结构，支撑面 m1形成于支撑本体210的一个表面上。以图5为例，支撑件200借助支撑面m1支撑第一极片p1。
如此，通过将支撑面m1构造为在目标极片p0的幅宽方向F1上支撑目标极片p0，可以增大支撑件200支撑目标极片p0的支撑面m1积，使得支撑件200对于目标极片p0的支撑更为有效。与此同时，由于是通过面接触的形式对目标极片p0进行支撑，一方面，可以对目标极片p0的入料过程进行导向；另一方面，也可以使得目标极片p0入料前能够被抚平。也即，能够更进一步提高目标极片p0入料的稳定性，避免出现目标极片p0翻折、褶皱等质量问题。
根据本申请的一些实施例，请参照图7，并结合参照图3、图5和图6，图7为本申请一些实施例中另一视角下支撑件200与目标极片p0相配合的结构示意图。支撑面m1在幅宽方向F1上的尺寸L，大于等于目标极片p0的幅宽W。
如此，使得目标极片p0在幅宽方向F1上能够被支撑面m1所支撑，可以更进一步实现支撑件200对于目标极片p0的有效支撑。
根据本申请的一些实施例，请继续参照图7，并结合参照图3、图5和图6，支撑面m1构造为平面。
通过构造为平面的支撑面m1，能够更进一步增大支撑面m1与目标极片p0的接触面积，且能够与目标极片p0的形状相适配，实现对于目标极片p0更为稳定地支撑。
根据本申请的一些实施例，请继续参照图7，并结合参照图3、图5和图6，支撑面m1的表面粗糙度小于5微米。
如此，通过对于支撑面m1的表面粗糙度的限定，在目标极片p0入料时可以降低支撑件200与目标极片p0之间产生的摩擦力，避免支撑件200对目标极片p0产生损伤。
根据本申请的一些实施例，请继续参照图6和图7，并结合参照图3和图5，支撑件200还包括与支撑面m1相连接的辅助面m2，辅助面m2可以设置于支撑面m1沿目标极片p0的入料方向的两侧。具体地，辅助面m2相对于支撑面m1是倾斜的，辅助面m2构造为弧面且平滑连接于支撑面m1。
如此，可以通过设置辅助面m2，在支撑面m1支撑于目标极片p0时，辅助目标极片p0的入料过程，更进一步降低支撑件200与目标极片p0之间产生的摩擦力，从而缓解支撑件200对目标极片p0的损伤。
根据本申请的一些实施例，请继续参照图3至图5，切分机构100包括切分件110以及驱动装置120。切分件110用于在切割位置切断隔离件p3。驱动装置120传动连接切分件110，用于驱动切分件110移动至切断位置。其中，支撑件200连接于切分件110。
由于切分机构100包括切分件110和驱动装置120，而支撑件200连接于切分件110，在驱动装置120驱动切分件110移动至切断位置时，支撑件200能够在切分件110的带动下 移动至靠近切断位置的位置。也就是说，支撑件200可以与切分件110共同在驱动装置120的驱动下进行移动。以图5为例，在切分件110移动至切断位置时，切分件110附近的区域是受限的。在受限的空间里，通过直接将支撑件200连接于切分件110上，可以省略单独用于驱动支撑件200的动力机构，如此，可以避免因空间受限而难以在切断位置附近的区域使用支撑件200。由此，支撑件200可以在切断位置附近的区域对目标极片p0进行支撑，能够更进一步提高目标极片p0入料的平稳性。
根据本申请的一些实施例，请继续参照图3至图5，驱动装置120包括驱动电机121和传动件122。驱动电机121的输出端传动连接传动件122的一端，传动件122的另一端传动连接切分件110。当然，还可以使用例如直线气缸等驱动装置。只要能够驱动切分件110移动至切断位置即可，本申请实施例对此不作具体限制。
如此，可以根据实际使用情况，灵活设置驱动装置120的结构形式，只要能够满足使用需求即可。
根据本申请的一些实施例，请继续参照图3至图5，切分机构100还包括第三安装件130、杆件140和第二弹性件150。第三安装件130连接于驱动装置120的驱动端(即前述一些实施例中的传动件122的另一端)。第二弹性件150连接于切分件110和第三安装件130之间，杆件140穿设于第二弹性件150内并固定于第三安装件130上。
通过设置第二弹性件150，可以使得切分件110切断隔膜件的过程更为柔性，而利用杆件140可以对第二弹性件150的伸缩进行导向，如此，使得切分件110的动作过程更为稳定。
根据本申请的一些实施例，请继续参照图3至图5，切断装置10还包括第一调节装置300。第一调节装置300连接于支撑件200与切分件110之间，用于调节在目标极片p0的幅宽方向F1上，支撑件200相对目标极片p0的位置。
如此，通过设置第一调节装置300，可以在目标极片p0的幅宽方向F1上对支撑件200进行调节。也就是说，针对不同大小和位置的目标极片p0，也可以通过第一调节装置300调节支撑件200的位置，也能提高装置使用时的通用性。
根据本申请的一些实施例，请继续参照图3和图5，第一调节装置300包括第一安装件310和固定件320。第一安装件310连接支撑件200，且第一安装件310借助固定件320可拆卸连接切分机构100。例如，第一安装件310可以安装在前述一些实施例中的第三安装件130上。作为一种实施方式，可以将第一安装件310配置为能够与第三安装件130沿如图4所示的幅宽方向F1上滑动连接，再通过固定件320将第一安装件310固定于第三安装件130上。作为另一种实施方式，可以在第三安装件130上设置沿幅宽方向F1间隔布置的定位孔，固定件320能够与定位孔相配合，以将第一安装件310固定于第三安装件130上。示例性地，固定件320可以是螺栓组件。当然，还可以采用其他实施方式，只要能够实现第一调节装置 300在幅宽方向F1上调节支撑件200的位置即可，本申请实施例对此不作具体限制。
如此，通过第一安装件310与切分机构100可拆卸连接的方式，便于调节第一安装件310相对于切分机构100的位置，进而调节与第一安装件310相连的支撑件200的位置。
根据本申请的一些实施例，请参照图8，并结合参照图3和图5，图8为本申请一些实施例中支撑件200与第二调节装置400相配合的结构示意图，切断装置10还包括第二调节装置400。第二调节装置400连接于支撑件200与第一调节装置300之间，以使支撑件200能够绕一轴线a转动。其中，轴线a与目标极片p0的幅宽方向F1彼此平行。例如，第二调节装置400可以设置于前述一些实施例中的第一安装件310上。
如此，通过设置第二调节装置400，便于对支撑件200相对于目标极片p0的角度进行调节。
根据本申请的一些实施例，请继续参照图8，并结合参照图3和图5，第二调节装置400包括第二安装件410、转动连接件420及固定连接件430。第二安装件410连接第一调节装置300。支撑件200借助转动连接件420绕轴线a可转动连接于第二安装件410。固定连接件430可拆卸连接于第二安装件410与支撑件200之间。例如，如图5和图8所示，具体实施时，第二安装件410可以连接于前述一些实施例中的第一安装件310上。支撑件200可以设置为包括前述一些实施例中所言的支撑本体210以及与支撑本体210相连接的第四安装件220，第四安装件220借助转动连接件420绕轴线a可转动连接于第二安装件410。
通过设置转动连接件420，使得支撑件200可以绕轴线a可转动连接于第二安装件410。同时，通过设置可拆卸的固定连接件430，使得在支撑件200相对于第二安装件410转动所需要的角度时，能够借助固定连接件430将转动所需要的角度后的支撑件200固定。
根据本申请的一些实施例，请继续参照图8，并结合参照图3和图5，第二安装件410上设有导向孔411。固定连接件430包括插入件431和紧固件432。插入件431的一端连接支撑件200，另一端插设于导向孔411内。紧固件432可拆卸连接于插入件431的另一端，以将插入件431的另一端定位于导向孔411内。其中，导向孔411构造为弧形孔，且导向孔411的弧心位于轴线a上。示例性地，插入件431可以构造为螺杆结构，紧固件432可以构造为与插入件431相配合的螺母结构。第二安装件410上在导向孔411的周围可以设置刻度线，以便于指示调节的角度。
由于导向孔411的弧心位于轴线a上，在支撑件200绕轴线a相对于第二安装件410进行转动时，与支撑件200相连接的插入件431能够与导向孔411相互配合，并通过紧固件432进行固定。
根据本申请的一些实施例，请继续参照图3至图5，切分件110包括电阻式热切刀或电热丝式热切刀。
如此，可以通过选择电阻式热切刀或者电热式热切刀，利用热切刀所产生的热量切断 隔离件p3。
根据本申请的一些实施例，可以将切分件110设置为电阻式热切刀，并且在切分件110处于切断位置时，将切分件110的切分参数配置为通电电压为220V，通电时间为0.03秒至3.5秒，使得切割件内的电阻丝温度控制在110℃至380℃。
如此，在切分件110靠近隔离件p3到熔断隔离件p3的短时间内通电，带电时间短，在使得切分件110升温快，断电后降温速度快，在提高安全性能的同时能够更快速地切断隔离件p3。另外，可以根据隔离件p3的材质及结构，对电阻丝温度进行适当调整，本申请实施例对此不作具体限制。
根据本申请的一些实施例，本申请提供了一种电池流水线生产设备，包括起卷卷针20、收卷卷针30和上述实施例中的切断装置10。起卷卷针20和收卷卷针30沿隔离件p3的入料方向依次布置。其中，切分机构100用于切断位于起卷卷针20和收卷卷针30之间的隔离件p3。目标极片p0为入料至起卷卷针20前的第一极片p1和第二极片p2中位于待起卷内侧的极片，待起卷内侧为更靠近起卷卷针20的一侧。以图5为例，参照前述一些实施例中示意出的内容，第三卷针A3为起卷卷针20，第一卷针A1为收卷卷针30，目标极片p0为第一极片p1，后文沿用此说明不再赘述。
如此，通过在切分机构100切断位于起卷卷针20和收卷卷针30之间的隔离件p3，并在切断的同时，借助支撑件200支撑入料至起卷卷针20且更靠近起卷卷针20的目标极片p0，使得目标极片p0能够更平稳地入料至起卷卷针20，从而能够缓解电芯的卷绕过程中因切断隔离件p3导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。
根据本申请的一些实施例，请继续参照图5，切分机构100处于切断位置，沿支撑件200支撑目标极片p0的方向上，支撑件200与起卷卷针20(即图5中示意出的第三卷针A3)之间具有预设间隙d。示例性地，预设间隙d可以设置为小于2毫米。例如，预设间隙d可以为0.5毫米、0.7毫米、0.9毫米、1毫米、1.2毫米、1.8毫米等。预设间隙d根据实际使用情况进行设置，本申请实施例对此不作具体限制。
由于越靠近起卷卷针20处的区域，隔离件p3产生的回弹或是翻转更为严重，通过设置支撑件200与切分机构100之间的位置关系，如此，可以依据实际使用情况，对支撑件200的位置进行设置，以满足支撑件200对于目标极片p0的支撑。也即是在切分机构100处于切断位置时，支撑件200与起卷卷针20之间能够具有预设间隙d。
根据本申请的一些实施例，请继续参照图5，电池流水线生产设备还包括第一滚动件40和第二滚动件50。第一滚动件40与切分机构100相连接，第二滚动件50布置于起卷卷针20和收卷卷针30之间。切分机构100处于切断位置，第一滚动件40能够与第二滚动件50之间形成限位空间，限位空间用于对在起卷卷针20和收卷卷针30之间的隔离件p3限位。
也就是说，在前述一些实施例示意出的内容上，以图5为例，可以将第一滚动件40 连接于第三安装件130上，第二滚动件50可以借助安装结构连接于转动件B上。在转动件B带动第一卷针A1、第二卷针A2和第三卷针A3转动时，第二滚动件50也跟随转动。可以理解的是，在第一卷针A1和第二卷针A2之间、第一卷针A1和第三卷针A3之间、第二卷针A2和第三卷针A3之间均布置有第二滚动件50，能够满足连续性生产的需求。切分机构100处于切断位置，第一滚动件40能够与对应的第二滚动件50之间形成限位空间。也即是，第一滚动件40将隔离件p3压紧于对应的滚动件上，使得在形成的限位空间内对在第一卷针A1和第二卷针A2之间的隔离件p3限位。
如此，可以借助第一滚动件40和第二滚动件50对位于起卷卷针20和收卷卷针30之间的隔离件p3限位，避免隔离件p3被切断时损坏收卷卷针30。
根据本申请的一些实施例，请继续参照图3和图5，电池流水线生产设备还包括第一弹性件60。第一弹性件60连接于第一滚动件40与切分机构100之间。切分机构100处于切断位置，第一滚动件40能够借助第一弹性件60的弹性力压紧于隔离件p3。
由此，通过设置第一弹性件60，使得第一滚动件40压紧位于收卷卷针30的隔离件p3的过程更为柔性，降低对于位于收卷卷针30的隔离件p3的损坏。
根据本申请的一些实施例，请继续参照图3和图5，第一滚动件40和第二滚动件50均设有多个，全部第二滚动件50沿隔离件p3的入料方向间隔布置，全部第一滚动件40与全部第二滚动件50一一对应。以图3和图5为例，示意出第一滚动件40设有两个，且与第一滚动件40相对应的第二滚动件50(也即此时位于第一卷针A1和第二卷针A2之间的第二滚动件50)设置有两个的情形。可以根据使用情况进行设置，本申请实施例对此不作具体限制。
通过设置多个第一滚动件40和第二滚动件50，便于将位于起卷卷针20和收卷卷针30之间的隔离件p3进行限位，更进一步避免隔离件p3被切断时损坏收卷卷针30。
根据本申请的一些实施例，第一滚动件40和/或第二滚动件50的表面设有弹性层。弹性层是可以产生弹性形变并可以恢复的层状结构。弹性层的材质可以是橡胶，也可以是海绵等弹性材料，本申请实施例对此不作具体限制。
通过在第一滚动件40和/或第二滚动件50的表面设置弹性层，借助弹性层的弹性，能够避免滚动件压紧隔离件p3时使隔离件p3受损。
根据本申请的一些实施例，第一滚动件40和/或第二滚动件50的直径为5毫米至40毫米。例如，第一滚动件40和/或第二滚动件50的直径可以为5毫米、7毫米、10毫米、15毫米、20毫米、25毫米、30毫米、35毫米、40毫米。
如此，可以根据卷绕于收卷卷针30上的电芯的大小，对应设置第一滚动件40和/或第二滚动件50的直径，以便于能够更好地限位位于起卷卷针20和收卷卷针30之间的隔离件p3。
由此，通过在上述一些实施例中的切断装置10上设置第一滚动件40，在卷针组件上 设置第二滚动件50，并结合对于第一滚动件40和第二滚动件50的结构形式、布置形式的设计，可以在切断隔离件p3时，将连接收卷卷针30的隔离件p3的部分压紧的同时避免隔离件p3受损，也能使得整体结构更为紧凑。
综上所述，本申请提供的切断装置10中，通过设置与切分机构100相连接的支撑件200，以及用于调节支撑件200的第一调节装置300和第二调节装置400，能够针对目标极片p0的位置而调节支撑件200的位置。在切分机构100处于切断位置而切断隔离件p3时，支撑件200能够提供作用于目标极片p0的支撑力，进而在隔离件p3因被切断产生回弹并撞击至目标极片p0时，目标极片p0能够在支撑件200的支撑下避免因隔离件p3的回弹而产生歪斜，从而能够缓解电芯的卷绕过程中因切断隔离件p3导致的极片褶皱的问题，降低了电池内部产生缺陷的风险。又由于支撑件200连接于在切分机构100的切分件110上，能够在空间受限的情况下，伸入至起卷卷针20附近的区域，对目标极片p0的入料首端提供支撑，使得目标极片p0的入料过程更为精准。并且，由于支撑件200能够跟随切分件110而移动，仅使用一个驱动装置120就可以实现动作过程，使得生产速度得以进一步提升，也降低了制造成本。因此，对于应用有该切断装置10的电池流水线生产设备而言，能够使得电池流水线生产设备生产出更高质量的电池。
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 (18)

  1. 一种切断装置(10)，用于电芯，所述电芯包括第一极片(p1)、第二极片(p2)以及用于分隔所述第一极片(p1)和所述第二极片(p2)的隔离件(p3)，其中，所述切断装置(10)包括：
    切分机构(100)，用于切断所述隔离件(p3)；以及
    支撑件(200)，所述支撑件(200)连接所述切分机构(100)；所述切分机构(100)处于切断位置，所述支撑件(200)能够提供支撑于目标极片(p0)的支撑力；
    其中，所述目标极片(p0)为入料起卷前的所述第一极片(p1)和所述第二极片(p2)中位于待起卷内侧的极片。
  2. 根据权利要求1所述的切断装置(10)，其中，所述切分机构(100)处于切断位置，所述支撑件(200)能够提供支撑于目标极片(p0)的入料首端的支撑力。
  3. 根据权利要求1所述的切断装置(10)，其中，所述支撑件(200)包括用于支撑所述目标极片(p0)的支撑面(m1)；
    所述支撑面(m1)构造为能够在所述目标极片(p0)的幅宽方向(F1)上支撑所述目标极片(p0)的至少部分。
  4. 根据权利要求3所述的切断装置(10)，其中，所述支撑面(m1)在所述幅宽方向(F1)上的尺寸(L)，大于等于所述目标极片(p0)的幅宽(W)。
  5. 根据权利要求3所述的切断装置(10)，其中，所述支撑面(m1)构造为平面。
  6. 根据权利要求3所述的切断装置(10)，其中，所述支撑面(m1)的表面粗糙度小于5微米。
  7. 根据权利要求1-6任一项所述的切断装置(10)，其中，所述切分机构(100)包括：
    切分件(110)，用于在所述切断位置切断所述隔离件(p3)；以及
    驱动装置(120)，所述驱动装置(120)传动连接所述切分件(110)，用于驱动所述切分件(110)移动至所述切断位置；
    其中，所述支撑件(200)连接于所述切分件(110)。
  8. 根据权利要求7所述的切断装置(10)，其中，所述切断装置(10)还包括第一调节装置(300)；
    所述第一调节装置(300)连接于所述支撑件(200)与所述切分件(110)之间，用于调节在所述目标极片(p0)的幅宽方向(F1)上，所述支撑件(200)相对所述目标极片(p0)的位置。
  9. 根据权利要求8所述的切断装置(10)，其中，所述第一调节装置(300)包括第一安装件(310)和固定件(320)；
    所述第一安装件(310)连接所述支撑件(200)，且所述第一安装件(310)借助所述固定件(320)可拆卸连接所述切分机构(100)。
  10. 根据权利要求8所述的切断装置(10)，其中，所述切断装置(10)还包括第二调节装置(400)；
    所述第二调节装置(400)连接于所述支撑件(200)与所述第一调节装置(300)之间，以使所述支撑件(200)能够绕一轴线(a)转动；
    其中，所述轴线(a)与所述目标极片(p0)的幅宽方向(F1)彼此平行。
  11. 根据权利要求10所述的切断装置(10)，其中，所述第二调节装置(400)包括：
    第二安装件(410)，所述第二安装件(410)连接所述第一调节装置(300)；
    转动连接件(420)，所述支撑件(200)借助所述转动连接件(420)绕所述轴线(a)可转动连接于所述第二安装件(410)；及
    固定连接件(430)，所述固定连接件(430)可拆卸连接于所述第二安装件(410)与所述支撑件(200)之间。
  12. 根据权利要求11所述的切断装置(10)，其中，所述第二安装件(410)上设有导向孔(411)；
    所述固定连接件(430)包括插入件(431)和紧固件(432)；所述插入件(431)的一端连接所述支撑件(200)，另一端插设于所述导向孔(411)内，所述紧固件(432)可拆卸连接于所述插入件(431)的另一端，以将所述插入件(431)的另一端定位于所述导向孔(411)内；
    其中，所述导向孔(411)构造为弧形孔，且所述导向孔(411)的弧心位于所述轴线(a)上。
  13. 根据权利要求7所述的切断装置(10)，其中，所述切分件(110)包括电阻式热切刀或电热丝式热切刀。
  14. 一种电池流水线生产设备，其中，包括：
    起卷卷针(20)和收卷卷针(30)，所述起卷卷针(20)和所述收卷卷针(30)沿隔离件(p3)的入料方向依次布置；及
    如权利要求1-13任一项所述的切断装置(10)；
    其中，所述切分机构(100)用于切断位于所述起卷卷针(20)和所述收卷卷针(30)之间的所述隔离件(p3)；
    所述目标极片(p0)为入料至所述起卷卷针(20)前的所述第一极片(p1)和所述第二极片(p2)中位于待起卷内侧的极片，所述待起卷内侧为更靠近所述起卷卷针(20)的一侧。
  15. 根据权利要求14所述的电池流水线生产设备，其中，所述切分机构(100)处于所述切断位置，沿所述支撑件(200)支撑所述目标极片(p0)的方向上，所述支撑件(200)与所述起卷卷针(20)之间具有预设间隙(d)。
  16. 根据权利要求14或15所述的电池流水线生产设备，其中，所述电池流水线生产设备还包括与所述切分机构(100)相连接的第一滚动件(40)，以及布置于所述起卷卷针(20)和所述收卷卷针(30)之间的第二滚动件(50)；
    所述切分机构(100)处于所述切断位置，所述第一滚动件(40)能够与所述第二滚动件(50)之间形成限位空间，所述限位空间用于对在所述起卷卷针(20)和所述收卷卷针(30)之间的所述隔离件(p3)限位。
  17. 根据权利要求16所述的电池流水线生产设备，其特征在于，所述电池流水线生产设备还包括连接于所述第一滚动件(40)与所述切分机构(100)之间的第一弹性件(60)；
    所述切分机构(100)处于所述切断位置，所述第一滚动件(40)能够借助所述第一弹性件(60)的弹性力抵接于所述隔离件(p3)。
  18. 根据权利要求16所述的电池流水线生产设备，其特征在于，所述第一滚动件(40)和所述第二滚动件(50)均设有多个，全部所述第二滚动件(50)沿所述隔离件(p3)的入料方向间隔布置，全部所述第一滚动件(40)与全部所述第二滚动件(50)一一对应；和/或
    所述第一滚动件(40)和/或所述第二滚动件(50)的表面设有弹性层；和/或
    所述第一滚动件(40)和/或所述第二滚动件(50)的直径为5毫米至40毫米。
PCT/CN2023/102573 2022-09-23 2023-06-27 切断装置及电池流水线生产设备 WO2024060741A1 (zh)

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