WO2024239153A1 - 同步卷绕电极组件的装置及其方法、计算机存储介质 - Google Patents

同步卷绕电极组件的装置及其方法、计算机存储介质 Download PDF

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Publication number
WO2024239153A1
WO2024239153A1 PCT/CN2023/095337 CN2023095337W WO2024239153A1 WO 2024239153 A1 WO2024239153 A1 WO 2024239153A1 CN 2023095337 W CN2023095337 W CN 2023095337W WO 2024239153 A1 WO2024239153 A1 WO 2024239153A1
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Prior art keywords
pole piece
length
piece
pole
electrode
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PCT/CN2023/095337
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English (en)
French (fr)
Inventor
黄国达
谢超
周晨
王艺若
黄靖华
张小畏
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Priority to CN202380059477.4A priority Critical patent/CN119678288A/zh
Priority to PCT/CN2023/095337 priority patent/WO2024239153A1/zh
Publication of WO2024239153A1 publication Critical patent/WO2024239153A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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 electrode assembly winding, and in particular to a device and method for synchronously winding an electrode assembly, and a computer storage medium.
  • the embodiments of the present application provide a device and method for synchronously winding electrode assemblies, and a computer storage medium, which can reduce the adverse effects of unstable factors on synchronously winding electrode assemblies, reduce the probability of synchronous winding device downtime, and improve the production speed of electrode assemblies.
  • a device for synchronously winding an electrode assembly comprising: a winding component, a cutting component and a cache component: wherein the cache component is located between the cutting component and the winding component; the winding component is used for synchronously winding a plurality of pole pieces; the cache component is used for caching a first target pole piece among the plurality of pole pieces, wherein the first target pole piece is a pole piece other than a reference pole piece among the plurality of pole pieces, and the reference pole piece is a pole piece having the longest detection length among the plurality of pole pieces; the cutting component is used for cutting the plurality of pole pieces when the first target pole piece is cached.
  • excess electrode sheets in the electrode assembly corresponding to the first target electrode sheet are cached between the cutting component and the winding component through a cache component, so that the used lengths of electrode sheets from the same material roll in multiple electrode assemblies are closer, thereby reducing the impact of unstable factors on the synchronously wound electrode assembly, reducing the probability of shutdown of the synchronous winding device, and improving the production speed of the electrode assembly.
  • the cache component is used to cache a pole segment of a first length of a first target pole piece, wherein the first length is a difference between a detection length of the first target pole piece and a detection length of a reference pole piece.
  • the caching status of the first target pole piece by the cache component is determined by the difference between the detection length of the first target pole piece and the detection length of the reference pole piece, and the excess pole piece can be accurately compensated to the tail of the corresponding electrode assembly, thereby making the lengths of the pole pieces used by multiple electrode assemblies closer.
  • the apparatus for synchronously winding an electrode assembly further includes: a tension adjustment component, which is used to adjust the tension of the plurality of pole pieces; wherein the tension adjustment component is located upstream of the cutting component. In this way, the transmission process of the plurality of pole pieces can be provided with corresponding tension, which is conducive to obtaining a better winding effect.
  • the tension adjustment component includes a plurality of tension members corresponding to the plurality of pole pieces. Adjustment subcomponents, wherein each tension adjustment subcomponent is used to adjust the tension of a corresponding pole piece.
  • each tension adjustment subcomponent can cache the pole segments of the corresponding pole piece while adjusting the tension of the corresponding pole piece, when the cache component does not cache the first target pole piece, the redundant pole pieces can be cached on the corresponding tension adjustment subcomponent, thereby further reducing the probability of pole piece accumulation during the transmission process, which is beneficial to the normal operation of the synchronously wound electrode assembly device.
  • the cache component when the tension adjustment subcomponent corresponding to the first target pole piece is in a limited state, the cache component is used to cache a pole segment of a second length of the second target pole piece, and the second target pole piece is the pole piece corresponding to the tension adjustment subcomponent in a non-limited state.
  • the length of the actual cache of the first target pole piece by the cache component is usually greater than the first length, which will cause the tension adjustment subcomponent to deviate from the normal state, and if the length of the cache component caches the first target pole piece for multiple times is greater than the first length, the corresponding tension adjustment subcomponent will deviate more and more from the normal state, thereby reaching the limit state.
  • the pole segment of the second length of the second target pole piece can be cached. In this way, the adverse effects of mechanical errors on the device of the synchronously wound electrode assembly can be reduced.
  • the second length is determined according to a variation range of the pole piece length corresponding to the tension adjustment subcomponent.
  • the buffer error of the buffer component to the first target pole piece can be determined by the pole piece length variation range corresponding to the tension adjustment subcomponent. Therefore, by determining the second length by the pole piece length variation range, the corresponding mechanical error can be compensated according to the actual situation, and the mechanical error can be compensated well.
  • the second length is one third to two thirds of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the tension adjustment component since the tension adjustment component is usually changed from a normal working state to a limited state, the change in the length of the pole piece corresponding to the tension adjustment component is usually one-third to two-thirds of the maximum pole piece length. In this way, not only most working conditions can be used, but also mechanical errors can be compensated more accurately to obtain a better winding effect.
  • the second length is half of the maximum pole piece length change corresponding to the tension adjustment component.
  • the tension adjustment component when the tension adjustment component is in the normal working condition, the corresponding pole piece length is half of the maximum pole piece length change. And, under normal circumstances, the tension adjustment component is basically in the normal working condition. That is to say, due to the existence of mechanical errors, the tension adjustment component will change from the normal working condition state to the limit state, and the change in the length of the pole piece corresponding to the tension adjustment component is usually half of the maximum pole piece length change corresponding to the tension adjustment component. Therefore, the mechanical error can be compensated more accurately to obtain a better winding effect.
  • the second length is determined based on the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the tension adjusting sub-components corresponding to the plurality of first target pole pieces are all in the limit state, due to the different influences of the mechanical errors of the buffer components, the tension adjusting sub-components in the limit state Furthermore, the shorter the pole piece length corresponding to the tension adjustment subcomponent in the limited state is, the greater the impact of the mechanical error of the buffer component is. In order to better compensate for the mechanical error, the second length can be determined according to the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the cutting component is further used to: cut off the corresponding anode electrode piece based on the cut length of the anode electrode piece, and the cut length of the anode electrode piece is determined based on the buffer length of the cathode electrode piece corresponding to the tension adjustment sub-component in the limited state.
  • the cut length of the anode electrode piece can be at least b longer than the cut length of the cathode electrode piece, which can improve the qualified rate of the electrode assembly.
  • b is the difference between the length of the anode electrode piece and the length of the cathode electrode piece in the standard electrode assembly.
  • the cut-off length of the anode electrode piece is determined by the buffer length of the second target electrode piece, the standard length of the anode electrode piece, and the difference between the detection lengths of different anode electrode pieces. In this way, when the electrode piece corresponding to the tension adjustment subcomponent in the limit state is the cathode electrode piece, and the detection lengths of the anode electrode pieces of multiple electrode assemblies are different, multiple electrode assemblies that meet the standards can be obtained, thereby improving the qualified rate of the electrode assemblies.
  • the cut-off length of the anode electrode piece is equal to the sum of the buffer length of the second target electrode piece, the standard length of the anode electrode piece, and the difference between the detection lengths of N times different anode electrode pieces. In this way, the length of the anode electrode piece can be increased, the number of electrode assemblies that meet the standards can be further increased, and the qualified rate of the electrode assemblies can be further improved.
  • the cache component includes multiple cache subcomponents corresponding to multiple pole pieces; wherein each cache subcomponent is used to cache the corresponding pole piece.
  • each pole piece can be cached accordingly, which not only allows for more working scenarios, but also allows the pole pieces from the same material roll in multiple electrode assemblies to have closer lengths.
  • each cache subcomponent includes a plurality of fixed rollers and a plurality of movable rollers, the plurality of fixed rollers and the plurality of movable rollers are respectively located on both sides of the pole piece, at least one of the plurality of movable rollers moves toward one side of the plurality of fixed rollers to cache the corresponding pole segments of the pole piece, and the number of the plurality of fixed rollers is greater than or equal to the number of the plurality of movable rollers. In this way, the pole segments of the pole piece can be cached simply, flexibly, and accurately.
  • each buffer sub-component includes an embossing roller, which is used to set convex points on the corresponding pole piece to buffer the pole segment of the pole piece. In this way, the pole segment of the pole piece can be conveniently buffered.
  • each tension adjustment subcomponent includes two fixed rollers and movable rollers located on both sides of the line connecting the two fixed rollers; wherein, when each tension subcomponent is in a limited position, the distance between the fixed roller and the movable roller is within a preset range along a direction perpendicular to the line.
  • the movable roller and the fixed roller it is convenient to provide tension to the pole pieces in the plurality of electrode assemblies being wound; and according to the relative position of the movable roller and the fixed roller, it is convenient to determine the corresponding state of the tension adjustment component.
  • the difference between the detection length of the first target pole piece and the detection length of the reference pole piece is greater than a preset value. In this way, the number of times the cache component caches the first target pole piece can be reduced to a certain extent, thereby improving the efficiency of the synchronously wound electrode assembly under the premise that the detection lengths of multiple pole pieces are substantially equal.
  • the preset value is between 1 mm and 2 mm. In this way, a balance can be achieved between substantially equal detection lengths of multiple pole pieces and the efficiency of the synchronously wound electrode assembly.
  • the cache component is also used to cache the first target pole piece when the detected length of the first target pole piece meets a preset length, wherein the preset length is determined based on standard lengths of multiple pole pieces.
  • the detection length of the first target pole piece will also change in different regularities. Therefore, when the first target pole piece meets the preset length, that is, when the detection length of the first target pole piece is close to the standard length of multiple pole pieces, the first target pole piece can be cached. This can reduce the number of times the cache component caches the first target pole piece to a certain extent, thereby improving the efficiency of the synchronously wound electrode assembly.
  • a method for synchronously winding an electrode assembly comprising: determining a first target pole piece among a plurality of synchronously wound pole pieces, the first target pole piece being a pole piece other than a reference pole piece among the plurality of pole pieces, the reference pole piece being a pole piece having the longest detection length among the plurality of pole pieces; caching the first target pole piece; and cutting off the plurality of pole pieces when the first target pole piece is cached.
  • the detection length of the electrode sheets in the electrode assemblies other than the electrode assembly with the largest diameter can be increased, so that the use lengths of the electrode sheets from the same material roll in the multiple electrode assemblies are closer, thereby reducing the adverse effects of unstable factors on the synchronously wound electrode assemblies, reducing the probability of the synchronous winding device crashing, and improving the production speed of the electrode assemblies.
  • caching the first target pole piece includes: caching a pole segment of a first length of the first target pole piece, wherein the difference between the detected length of the first target pole piece and the detected length of the reference pole piece.
  • the method for synchronously winding an electrode assembly also includes: when a tension adjustment subcomponent corresponding to a first target pole piece is in a limited state, caching a pole segment of a second length of a second target pole piece among multiple pole pieces, wherein the tension adjustment subcomponent is used to adjust the tension of the corresponding pole piece; the second target pole piece is a pole piece corresponding to the tension adjustment subcomponent in a non-limited state; and when the second target pole piece is cached, cutting off multiple pole pieces.
  • the second length is determined according to a variation range of the pole piece length corresponding to the tension adjustment subcomponent.
  • the second length is one third to two thirds of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the second length is half of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the second length is determined based on the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the method further comprises: The buffer length of the cathode electrode piece determines the cut-off length of the corresponding anode electrode piece.
  • the cut-off length of the anode pole piece is determined by the buffer length of the cathode pole piece, the standard length of the anode pole piece, and the difference between the detection lengths of different anode pole pieces.
  • the cut-off length of the anode pole piece is equal to the sum of the buffer length of the cathode pole piece, the standard length of the anode pole piece and the difference between N times the detection lengths between different anode pole pieces.
  • the difference between the detection length of the first target pole piece and the detection length of the reference pole piece is greater than a preset value.
  • the preset value is between 1 mm and 2 mm.
  • caching the first target pole piece includes: caching the first target pole piece when the detected length of the first target pole piece meets a preset length, wherein the preset length is determined based on standard lengths of multiple pole pieces.
  • a device for synchronously winding an electrode assembly comprising a determination module, the determination module being used to determine a first target pole piece among a plurality of synchronously wound pole pieces, the first target pole piece being a pole piece other than a reference pole piece among the plurality of pole pieces, the reference pole piece being a pole piece having the longest detection length among the plurality of pole pieces; a cache module, the cache module being used to cache the first target pole piece; and a cutting module, the cutting module being used to cut off the plurality of pole pieces when the first target pole piece is cached.
  • a computer-readable storage medium comprising a computer program, which, when executed on a computer, enables the computer to execute the method for synchronously winding an electrode assembly in the second aspect or any possible implementation of the second aspect.
  • FIG1 shows a schematic structural diagram of a winding device provided in an embodiment of the present application
  • FIG2 shows a partial schematic front view of a device for synchronously winding an electrode assembly provided in an embodiment of the present application
  • FIG3 shows another partial schematic structural diagram of a synchronously wound electrode assembly device provided in an embodiment of the present application
  • FIG4 shows a schematic structural diagram of a portion of the synchronously wound electrode assembly device shown in FIG3 , viewed from above;
  • FIG5 shows a schematic diagram of the structure of an encoder according to an embodiment of the present application.
  • FIG6 is a schematic structural diagram of a partial front view of another synchronously wound electrode assembly device provided in an embodiment of the present application.
  • FIG7 shows a schematic structural diagram of a tension adjustment component provided in an embodiment of the present application.
  • FIG8 is a schematic diagram showing a relationship between detection lengths of a plurality of pole pieces provided in an embodiment of the present application.
  • FIG. 9 shows another schematic diagram of the relationship between the detection lengths of multiple pole pieces provided in an embodiment of the present application. picture
  • FIG10 is a schematic diagram showing a relationship between detection lengths of a plurality of pole pieces provided in another embodiment of the present application.
  • FIG11 is a schematic diagram showing the structure of a cache subcomponent provided in an embodiment of the present application.
  • FIG12 is a schematic diagram showing the structure of another cache subcomponent provided in an embodiment of the present application.
  • FIG13 is a schematic structural diagram of a tension adjustment subcomponent provided in an embodiment of the present application.
  • FIG14 shows a schematic structural diagram of another tension adjustment subcomponent provided in an embodiment of the present application.
  • FIG15 is a flow chart showing a method for synchronously winding an electrode assembly provided by an embodiment of the present application.
  • FIG16 shows a block diagram of a device for synchronously winding an electrode assembly provided in an embodiment of the present application.
  • the size of the serial number of each process does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator.
  • 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 current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer, and the current collector not coated with the positive electrode active material layer serves as the positive electrode tab.
  • the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, 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 current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer, and the current collector not coated with the negative electrode active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc.
  • the material of the separator may be polypropylene (PP) or polyethylene (PE), etc.
  • the electrode assembly may be a wound structure.
  • the electrode assembly of the wound structure may be cylindrical as a whole, and the cylindrical electrode assembly is matched with a cylindrical housing to form a cylindrical battery cell as a whole.
  • a winding device winds a group of positive electrode sheets, negative electrode sheets and separators to form an electrode assembly. After completing the battery assembly, the winding device continues to wind a group of positive electrode sheets, negative electrode sheets and separators to form the next battery assembly.
  • the production efficiency of the battery assembly of this technical solution is low, which is not conducive to improving the production efficiency of battery cells and batteries.
  • multiple electrode assemblies can be wound simultaneously to speed up the production of electrode assemblies.
  • the electrode sheets of the same roll can be cut along the length direction to obtain multiple electrode sheets, such as the first electrode sheet and the second electrode sheet; the multiple electrode sheets are sent to the winding needle through multiple rollers for synchronous winding to obtain multiple electrode assemblies.
  • the thickness of the separators in multiple electrode assemblies is different, where the thickness of the separators is usually in the range of 10 to 30um, and the thickness fluctuations of separators of different rolls and separators of the same roll generally show a fluctuation of ⁇ 1um.
  • the change rules of the radius of multiple electrode assemblies will also be different.
  • the lengths of the pole pieces on the incoming side of multiple electrode assemblies are basically equal, while the lengths of the pole pieces used in multiple electrode assemblies are different. This may cause some pole pieces to accumulate between multiple rollers or on the material belt, which will have an adverse effect on the synchronously wound electrode assembly.
  • the amount of accumulated pole pieces is too much, it will also cause the synchronous winding device to shut down, reducing the production speed of the electrode assembly.
  • an embodiment of the present application proposes a device for synchronously winding electrode assemblies, which caches excess electrode sheets in the electrode assembly corresponding to the first target electrode sheet between the cutting component and the winding component through a cache component, so that the used lengths of electrode sheets from the same material roll in multiple electrode assemblies are closer, thereby reducing the adverse effects of unstable factors on the synchronously wound electrode assemblies, reducing the probability of downtime of the synchronous winding device, and improving the production speed of the electrode assemblies.
  • FIG1 shows a schematic structural diagram of a winding device provided in an embodiment of the present application.
  • the first unwinding component 211 may be provided with a rotating shaft, on which a layer of pole pieces 201 (material roll) are wound.
  • the pole pieces 201 wound on the shaft are output in a flat state, and the first unwinding component 211 completes the unwinding action.
  • the pole piece 201 is a cathode pole piece or an anode pole piece.
  • a conveying component may be provided downstream of the first unwinding component 211, for example, a plurality of roller structures as shown in FIG1 , or a conveyor belt, etc.
  • the conveying component may pass through a plurality of processing components in the winding device 20 to realize the flow conveyance of the pole piece 201 in the winding device 20.
  • the first cutting component 220 is disposed downstream of the first unwinding component 211 , and is used for receiving the pole piece 201 outputted from the first unwinding component 211 , and cutting the pole piece 201 along its length direction into a first pole piece 201 a and a second pole piece 201 b .
  • the winding component 230 is disposed downstream of the first cutting component 220. After the first cutting component 220 cuts the pole piece 201 into the first pole piece 201a and the second pole piece 201b, the first pole piece 201a and the second pole piece 201b can be simultaneously transported by the conveying component and reach the winding component 230.
  • the winding component 230 has a first winding part and a second winding part capable of simultaneous winding movement, and the first winding part and the second winding part are used to receive the first pole piece 201a and the second pole piece 201b respectively.
  • the first winding part and the second winding part can simultaneously wind the first pole piece 201a, the second pole piece 201b and the isolation film to form the first electrode assembly and the second electrode assembly respectively.
  • FIG2 shows a schematic structural diagram of a part of a synchronously wound electrode assembly provided in an embodiment of the present application, viewed from the front.
  • FIG3 shows another schematic structural diagram of a part of a synchronously wound electrode assembly provided in an embodiment of the present application, viewed from the front.
  • FIG4 shows another schematic structural diagram of a part of the synchronously wound electrode assembly shown in FIG3, viewed from the top.
  • the device includes a winding component 230, a cutting component 240 and a cache component 250: wherein the cache component 250 is located between the cutting component 240 and the winding component 230; the winding component 230 is used to synchronously wind multiple pole pieces 201a-201b; the cache component 250 is used to cache the first target pole piece among the multiple pole pieces 201a-201b, wherein the first target pole piece is the pole piece other than the reference pole piece among the multiple pole pieces 201a-201b, and the reference pole piece is the pole piece with the longest detection length among the multiple pole pieces 201a-201b; the cutting component 240 is used to cut off the multiple pole pieces 201a-201b when the first target pole piece is cached.
  • the winding component 230 can be driven by the same set of driving elements, preferably a servo motor, and the sum of the winding angles of the multiple electrode assemblies remains consistent. It should be understood that the winding component 230 is also used to wind the isolation film, that is, the winding component forms the electrode assembly by winding two pole pieces with different polarities and the isolation film.
  • the cutting component 240 includes a fixed knife and a movable knife. When the cutting component 240 cuts off the multiple pole pieces 201a-201b, the fixed knife and the movable knife can cut off the multiple pole pieces 201a-201b by meshing when the multiple pole pieces 201a-201b are stationary.
  • relative stillness can be that the multiple pole pieces 201a-201b stop, or that the multiple pole pieces 201a-201b are still moving, and the cutting component 240 accelerates along the moving direction of the multiple pole pieces 201a-201b so that the speed of the cutting component 240 is equal to the speed of the multiple pole pieces 201a-201b.
  • the polarity of multiple pole pieces 201a-201b is the same.
  • the detection length of multiple pole pieces 201a-201b can be determined by the encoder 260.
  • the encoder 260 can be located upstream of the cutting component 240 and the cache component 250.
  • the first target pole piece can be determined by the value on the encoder 260.
  • the encoder 260 includes a counter 261, a pole piece pressure roller 262, an encoding roller 263 and an encoding roller mounting fixed end 264.
  • the encoding roller 263 is installed on the equipment plate through the mounting fixed end 264.
  • the pole piece When the pole piece passes by, it will drive the encoding roller 263 to rotate, and the encoding roller 263 drives the counter 261, that is, the product of the number of memory circles of the counter 261 and the circumference of the encoding roller 263 is the detection length of multiple pole pieces 201a-201b.
  • the detection length of the plurality of pole pieces 201a-201b may also be the length of the pole pieces in the corresponding plurality of electrode assemblies.
  • the length of the pole pieces in the electrode assembly may be calculated based on the value on the encoder 260, or the number of turns of the electrode assembly may be identified and determined based on the diameter of each turn.
  • the buffer component 250 is used to buffer the electrode pieces that would not be wound into the electrode assembly with a smaller diameter between the cutting component 240 and the winding component 230. In other words, the buffer component 250 is used to buffer the excess electrode pieces in the electrode assembly with a smaller diameter between the cutting component 240 and the winding component 230.
  • the buffer component 250 can increase the length of the first target electrode piece 201a in the buffer component 250 to achieve the buffering of the first target electrode piece 201a.
  • the first target pole piece 201a applies a force perpendicular to the transmission direction of the first target pole piece 201a to change the transmission path of the first target pole piece 201a, or change the shape of the first target pole piece 201a.
  • the cutting component 240 cuts off the plurality of pole pieces 201a-201b so that the lengths of pole pieces used by the plurality of electrode assemblies are closer.
  • FIGS. 2 to 5 show the case where the number of the plurality of pole pieces is 2, but this number does not limit the number of the plurality of pole pieces, for example, the number of the plurality of pole pieces may be 3, 4, 5, etc. In other words, the number of the plurality of pole pieces is an integer greater than or equal to 2.
  • the following will take the synchronous winding of two electrode assemblies as an example for explanation.
  • the controller determines that the value of the encoder 260 on the first pole piece 201a is less than the value of the encoder 260 on the second pole piece 201b, that is, the diameter of the first electrode assembly is less than the diameter of the second electrode assembly.
  • the controller controls the cache component 250 on the first pole piece 201a to cache the excess pole piece between the cutting component 240 and the winding component 230. As the excess pole piece is cached, the value of the encoder 260 on the first pole piece 201a increases, and the value of the encoder 260 on the first pole piece 201a is getting closer and closer to the value of the encoder 260 on the second pole piece 201b.
  • the controller can control the cutting component 240 to cut off the first pole piece 201a and the second pole piece 201b at the same time when the cache component 250 on the first pole piece 201a caches the first pole piece 201a for a certain amount.
  • the excess electrode sheets in the electrode assembly corresponding to the first target electrode sheet are cached between the cutting component 240 and the winding component 230 through the cache component 250, so that the used lengths of the electrode sheets from the same material roll in multiple electrode assemblies are closer, thereby reducing the adverse effects of unstable factors on the synchronously wound electrode assemblies, reducing the probability of downtime of the synchronous winding device, and improving the production speed of the electrode assemblies.
  • the length of the first target electrode piece cached by the cache component 250 can be determined based on experimental values. For example, in the process of synchronously winding multiple electrode assemblies for multiple times, the detection lengths of multiple electrode pieces 201a-201b can be collected to obtain the difference in the detection lengths between the multiple electrode pieces 201a-201b, and the cache length of the first target electrode piece can be determined based on these differences. The length of the first target electrode piece cached by the cache component 250 can also be determined based on actual conditions.
  • the cache component 250 is used to cache a pole segment of a first length of a first target pole piece, wherein the first length is a difference between a detection length of the first target pole piece and a detection length of a reference pole piece.
  • the difference between the detected length of the first target pole piece and the detected length of the reference pole piece can be determined by the value on the corresponding encoder 260.
  • the controller determines the first length based on the value of the encoder 260 on the first pole piece 201a and the value of the encoder 260 on the second pole piece 201b; the controller controls the cache component 250 to cache the pole segment of the first length of the first target pole piece between the cutting component 240 and the winding component 230; the controller controls the cutting component 240 to cut off the first pole piece 201a and the second pole piece 201b when the value of the encoder 260 on the first pole piece 201a and the value of the encoder 260 on the second pole piece 201b are equal or approximately equal, and the values of the two encoders 260 are greater than or equal to the standard length.
  • the excess pole piece of the first length on the first pole piece 201 a can be wound to the tail of the first electrode assembly.
  • the number of the plurality of pole pieces is greater than 2, the number of the first target pole pieces may be greater than or equal to 1. Furthermore, the first target pole pieces may be respectively measured according to the difference between the detection lengths of the first target pole pieces and the reference pole pieces. The first target pole piece performs corresponding caching.
  • the caching status of the first target pole piece by the cache component 250 is determined by the difference between the detection length of the first target pole piece and the detection length of the reference pole piece, so that the excess pole piece can be accurately compensated to the tail of the corresponding electrode assembly, thereby making the lengths of the pole pieces used by multiple electrode assemblies closer.
  • a tension adjusting component 270 is used to adjust the tension of the plurality of pole pieces 201a-201b, wherein the tension adjusting component 270 is located upstream of the cutting component 240. In this way, the transmission process of the plurality of pole pieces 201a-201b can be provided with corresponding tension, which is conducive to obtaining a better winding effect.
  • the tension adjusting component 270 can adjust the tension of the plurality of pole pieces 201a-201b by controlling the transmission path of the plurality of pole pieces 201a-201b.
  • the tension adjusting component 270 may include a movable roller, a coupling roller, a motor, and a movable roller hard limit.
  • the movable roller in the tension adjusting component 270 pulls the redundant pole pieces in the plurality of pole pieces 201a-201b to apply a certain pressure to the plurality of pole pieces 201a-201b, so that the tape running process of the plurality of pole pieces 201a-201b has corresponding tension.
  • the synchronous winding electrode assembly device further includes a clamping and feeding component 280 with a clamping and deviation correction capability, the clamping and feeding component 280 has a certain ability to move along the axis of the clamping rod and has the ability to actively roll the electrode sheet, wherein a clamping roller of the clamping and feeding component 280 has an active rotation capability.
  • the tension adjustment component 270 may include at least one tension adjustment subcomponent. The number of tension adjustment subcomponents may be determined according to actual conditions.
  • the tension adjustment component 270 includes a plurality of tension adjustment subcomponents 270a-270b corresponding to the plurality of pole pieces 201a-201b, wherein each tension adjustment subcomponent is used to adjust the tension of the corresponding pole piece.
  • each tension adjustment subcomponent is used to adjust the tension of the corresponding pole piece.
  • the tension adjusting component 270 includes a first tension adjusting subcomponent 270a and a second tension adjusting subcomponent 270b.
  • the first tension adjusting subcomponent 270a is used to adjust the tension of the first pole piece 201a
  • the second tension adjusting subcomponent 270b is used to adjust the tension of the second pole piece 201b.
  • the initial states of the first tension adjusting subcomponent 270a and the second tension adjusting subcomponent 270b are substantially the same.
  • the state of the corresponding tension adjusting subcomponent and the corresponding pole piece length also change accordingly. For example, when the detection length of the first pole piece 201a is less than the detection length of the second pole piece 201b, the state of the first tension adjusting subcomponent 270a is the initial state, and the pole piece length corresponding to the first tension adjusting subcomponent 270a is longer than the pole piece length corresponding to the second tension adjusting subcomponent 270b.
  • the cache component 250 caches the first pole piece 201a.
  • the length of the pole piece corresponding to the first tension adjusting subcomponent 270a gradually decreases and becomes closer and closer to the initial state.
  • the actual buffering condition of the buffer component 250 for the first pole piece 201a deviates from the ideal buffering condition. If the actual buffering length of the buffer component 250 for the first pole piece 201a is greater than the ideal buffering length, the state of the first tension adjustment subcomponent 270a will deviate from the initial state and approach the ideal state. Limit status.
  • the error accumulates accordingly, the state of the first tension adjustment subcomponent 270a deviates increasingly from the initial state, and the pole piece length corresponding to the first tension adjustment subcomponent 270a becomes shorter and shorter, and eventually the tension of the first pole piece 201a cannot be adjusted, and the first pole piece 201a may even be disconnected.
  • the buffer component 250 buffers a first target pole piece that is too long, it is also possible that the plurality of tension adjustment subcomponents 270a-270b are unable to adjust the tension of the corresponding first target pole piece.
  • the cache component 250 when the tension adjustment subcomponent corresponding to the first target pole piece is in a limited state, the cache component 250 is used to cache a pole segment of a second length of the second target pole piece, and the second target pole piece is the pole piece corresponding to the tension adjustment subcomponent in a non-limited state.
  • the tension adjustment subcomponent being in the limited state indicates that the tension adjustment subcomponent has a poor ability to adjust the tension of the first target pole piece.
  • the state of the tension adjustment subcomponent can be determined by a position sensor. If the value of the position sensor reaches a threshold, it is determined that the tension adjustment subcomponent is in the limited state, wherein the threshold can be determined according to actual conditions.
  • the controller may identify the images of the first tension adjusting subcomponent 270a and the second tension adjusting subcomponent 270b to determine whether the first tension adjusting subcomponent 270a and the second tension adjusting subcomponent 270b are in a limited state. If the controller determines that the first tension adjusting subcomponent 270a or the second tension adjusting subcomponent 270b is in a limited state according to the recognition result, the cache component 250 is controlled to cache the second length of the second target electrode piece, and the detection length of the second target electrode piece becomes longer.
  • the controller controls the cutting component 240 to cut off the first electrode piece 201a and the second electrode piece 201b.
  • the controller controls the cutting component 240 to cut off the first electrode piece 201a and the second electrode piece 201b.
  • the first tension adjusting subcomponent 270a and the second tension adjusting subcomponent 270b are independent of each other, that is, the state of the first tension adjusting subcomponent 270a does not affect the state of the second tension adjusting subcomponent 270b.
  • the buffer component 250 is used to buffer the second length of the pole segment of the first pole piece 201a when the second tension adjustment subcomponent 270b is in a limited state; or, when the first tension adjustment subcomponent 270a is in a limited state, buffer the second length of the pole segment of the second pole piece 201b. In this way, the compensation effect of the mechanical error can be further improved.
  • the sum of the lengths of the second electrode pieces 201b used in the C second electrode assemblies may be greater than the sum of the lengths of the first electrode pieces 201a used in the C first electrode assemblies.
  • the first electrode assemblies are all wound on the first winding part
  • the second electrode assemblies are all wound on the second winding part
  • the second electrode pieces 201b in the C second electrode assemblies are all first target electrode pieces, and C>1.
  • the value of C is affected by the mechanical accuracy and the model of the tension adjustment subcomponent, and is specifically determined by the actual situation.
  • the buffer component 250 buffers the first pole piece 201a to increase the length of the first pole piece 201a to be wound in the C+1 first electrode assembly. In this way, the sum of the use lengths of the first electrode sheets 201a in C+1 first electrode assemblies can be close to the sum of the use lengths of the second electrode sheets 201b in C+1 second electrode assemblies.
  • the above embodiment shows a case where two electrode assemblies are wound synchronously, in which case the first target electrode piece and the second target electrode piece are different electrode pieces.
  • the second target electrode piece is another part of the electrode pieces in the multiple first target electrode pieces and the reference electrode piece.
  • the tension adjustment sub-components corresponding to another part of the electrode pieces in the first target electrode piece are in a non-limited state.
  • the change of the tension adjustment subcomponent from the normal state to the limit state is caused by the excessive length of the cache component for the first target pole piece.
  • the actual cache length of the first target pole piece by the cache component is greater than the first length.
  • the pole segment of the second length of the second target pole piece can be cached. In this way, the adverse effects of mechanical errors on the device of the synchronously wound electrode assembly can be reduced.
  • the cache length of the cache component 250 for the second target pole piece can be determined based on empirical values or based on actual conditions.
  • the second length is determined according to the variation range of the pole piece length corresponding to the tension adjustment subcomponent.
  • the corresponding mechanical error can be compensated according to the actual situation, and the mechanical error can be compensated better.
  • the pole piece length corresponding to the tension adjustment subcomponent is the length of the pole piece in the tension adjustment subcomponent
  • the pole piece length variation range corresponding to the tension adjustment subcomponent represents: the variation range of the pole piece length in the tension adjustment subcomponent when the tension adjustment subcomponent changes from a normal state to a limited state.
  • the change of the tension regulating subcomponent can be determined by a position sensor, and the corresponding pole piece length change range can be determined according to the change of the tension regulating subcomponent.
  • the second length is one third to two thirds of the maximum pole piece length variation corresponding to the tension adjustment subcomponent. In this way, the mechanical error can be compensated more accurately to obtain a better winding effect.
  • the change in the length of the pole piece corresponding to the tension adjustment subcomponent is usually from two-thirds of the maximum pole piece length to one-third of the maximum pole piece length.
  • the maximum pole piece length is the longest transmission path that the tension adjustment subcomponent can provide for the corresponding pole piece.
  • the second length is the error length generated by C second electrode assemblies, that is, the second length can be the change in the length of the pole piece corresponding to the change of the second tension adjustment subcomponent 210b from the normal state to the limit state.
  • the second length is half of the maximum pole piece length variation corresponding to the tension adjustment subcomponent. In this way, mechanical errors can be compensated more accurately and better winding effects can be obtained.
  • the normal working condition of the tension adjustment subcomponent is the condition where half of the maximum pole piece length change amount corresponding to the tension adjustment subcomponent is present. Moreover, under normal circumstances, the tension adjustment subcomponent is basically in the normal working condition. In other words, due to the existence of mechanical errors, the tension adjustment subcomponent will change from the normal working condition to the limit state. state, and the change in the pole piece length corresponding to the tension adjustment subcomponent is usually half of the maximum pole piece length corresponding to the tension adjustment subcomponent.
  • the second length may be determined according to the pole piece length variation range corresponding to any tension adjustment subcomponent in a limited state, or the second length may be determined according to the pole piece length variation range corresponding to the tension adjustment subcomponent in a limited state that meets the requirements.
  • the second length is determined based on the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the tension adjustment subcomponents corresponding to the multiple first target pole pieces are all in the limited state
  • the pole piece lengths corresponding to different tension adjustment subcomponents in the limited state are different.
  • the shorter the pole piece length corresponding to the tension adjustment subcomponent in the limited state is, the greater the influence of the mechanical error of the buffer component is.
  • the second length can be determined according to the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the multiple electrode pieces 201a-201b may be cathode electrode pieces of different electrode assemblies in the multiple electrode assemblies, or may be anode electrode pieces of different electrode assemblies in the multiple electrode assemblies.
  • the first target electrode piece may be a cathode electrode piece and/or an anode electrode piece
  • the second target electrode piece may be a cathode electrode piece and/or an anode electrode piece.
  • the cutting component 240 is further used to: cut off the corresponding anode electrode piece based on the cut length of the anode electrode piece, and the cut length of the anode electrode piece is determined based on the buffer length of the cathode electrode piece corresponding to the tension adjustment sub-component in the limited state.
  • the cut length of the anode electrode piece can be at least b longer than the cut length of the cathode electrode piece, which can improve the qualified rate of the electrode assembly.
  • the anode and cathode plates in a qualified electrode assembly should meet the preset condition: the difference between the winding length of the anode plate and the winding length of the cathode plate is b. Therefore, during the winding process of the electrode assembly, the length of the cathode plate will affect the length of the anode plate.
  • the cut-off length of the anode plate can be increased based on the cache length of the second target plate, and the corresponding anode plate can be cut off.
  • the increase in the anode plate can be equal to the cache length of the second target plate, or it can be greater than the cache length of the second target plate.
  • the cut-off length of the anode electrode piece is determined by the buffer length of the cathode electrode piece, the standard length of the anode electrode piece, and the difference between the detection lengths of different anode electrode pieces.
  • the electrode piece corresponding to the tension adjustment subcomponent in the limited state is the cathode electrode piece, and the detection lengths of the anode electrode pieces of the multiple electrode assemblies are different, multiple electrode assemblies that meet the standards can be obtained, thereby improving the qualified rate of the electrode assemblies.
  • the use length of the cathode electrode piece in the first electrode assembly may be greater than the standard length of the cathode electrode piece, and in order to meet the aforementioned preset conditions, it is necessary to determine the cutting length of the anode electrode piece in the first electrode assembly based on the cache length of the cathode electrode piece in the first electrode assembly.
  • the cut-off length of the anode pole piece is equal to the sum of the buffer length of the second target pole piece, the standard length of the anode pole piece and the difference between the detection lengths of N times different anode pole pieces.
  • the second target electrode piece is a cathode electrode piece
  • the first target electrode piece and the second target electrode piece are anode electrode pieces and/or cathode electrode pieces
  • the detection lengths of the anode electrode pieces on the first electrode assembly and the second electrode assembly are different.
  • the cut-off length of the anode electrode piece can be set to the sum of the difference between the cache length of the second target electrode piece, the standard length of the anode electrode piece, and the detection lengths between N times different anode electrode pieces. Where N ⁇ 0. In this way, the length of the anode electrode piece can be increased, and the electrode assembly that meets the standard can be further increased, further improving the qualified rate of the electrode assembly.
  • the present application proposes the following embodiments to describe the relationship between the detection length of the cathode electrode piece and the detection length of the anode electrode piece in corresponding application scenarios.
  • the first target pole piece is a cathode pole piece and an anode pole piece
  • the plurality of tension adjustment subcomponents 270 a - 270 b are in a normal state.
  • Step 810 The winding unit winds up a plurality of electrode assemblies synchronously, and the controller determines a first length according to the detected length of each cathode electrode piece.
  • step 820 the controller determines the length of the wound cathode electrode sheets in each electrode assembly.
  • Step 830 the controller determines the relationship between the detection lengths of the cathode electrodes:
  • the detection length La of the cathode piece of the first electrode assembly, the detection length Lb of the cathode piece of the second electrode assembly, and the standard length L1 of the cathode piece are equal.
  • the cache component 250 caches the cathode electrode piece of the second electrode assembly.
  • Step 850 the controller determines the relationship between the detection lengths of the anode pieces:
  • the detection length Lc of the anode electrode piece of the first electrode assembly, the detection length Ld of the anode electrode piece of the second electrode assembly, and the standard length L2 of the anode electrode piece are equal.
  • the cache component 250 caches the anode electrode piece of the second electrode assembly.
  • the cutting component 240 can cut off the cathode electrode piece and the anode electrode piece respectively in different time periods.
  • Step 880 finishing the plurality of electrode assemblies.
  • the above embodiment describes the situation where the multiple tension adjustment subcomponents 270a-270b are all in a non-limited state.
  • Other embodiments of the present application describe the situation where at least one tension adjustment subcomponent among the multiple tension adjustment subcomponents 270a-270b is in a limited state.
  • the second target electrode piece is a cathode electrode piece and the first target electrode piece includes
  • the synchronously wound electrode assembly device can perform the following actions.
  • step 900 the winding unit winds a plurality of electrode assemblies synchronously and determines whether a detection length La of a cathode electrode piece of a first electrode assembly is greater than a detection length Lb of a cathode electrode piece of a second electrode assembly.
  • Z1 represents the length of the electrode piece cached by the cache component 250 on the cathode electrode piece of the second electrode assembly.
  • the cathode electrode piece of the second electrode assembly is the second target electrode piece.
  • Step 910 determining whether the detection length Lc of the anode electrode piece of the first electrode assembly is greater than the detection length Ld of the anode electrode piece of the second electrode assembly.
  • Z3 represents the length of the electrode piece cached by the cache component 250 on the anode electrode piece of the second electrode assembly, and Z3 may be equal to Z2. That is, the anode electrode piece of the second electrode assembly is the first target electrode piece.
  • Z4 represents the length of the electrode piece cached by the cache component 250 on the cathode electrode piece of the first electrode assembly, and Z4 may be equal to Z1. That is, the cathode electrode piece of the first electrode assembly is the second target electrode piece.
  • Step 920 determining whether the detection length Lc of the anode electrode piece of the first electrode assembly is greater than the detection length Ld of the anode electrode piece of the second electrode assembly.
  • the anode electrode piece of the first electrode assembly is the first target electrode piece.
  • the anode electrode piece of the second electrode assembly is the second target electrode piece.
  • Step 930 performing final control based on the detected lengths of the cathode electrode piece and the anode electrode piece of the first electrode assembly and the detected lengths of the cathode electrode piece and the anode electrode piece of the second electrode assembly.
  • Step 940 finishing the first electrode assembly and the second electrode assembly.
  • the cathode electrode piece of the first electrode assembly and the cathode electrode piece of the second electrode assembly are cut off; and the anode electrode piece of the first electrode assembly and the anode electrode piece of the second electrode assembly are cut off.
  • the cut-off length of the anode electrode piece is determined based on the sum of the differences in the cache length of the second target electrode piece, the standard length of the anode electrode piece, and the detection lengths between N times different anode electrode pieces, thereby increasing the probability of a qualified electrode assembly among multiple electrode assemblies that meets production standards.
  • the synchronously wound electrode assembly device can perform the following actions.
  • a winding unit winds a plurality of electrode assemblies synchronously and determines whether a detection length La of a cathode electrode piece of a first electrode assembly is greater than a detection length Lb of a cathode electrode piece of a second electrode assembly.
  • the cathode electrode piece of the second electrode assembly is the second target electrode piece.
  • Step 110 determining whether the detection length Lc of the anode electrode piece of the first electrode assembly is greater than the detection length Ld of the anode electrode piece of the second electrode assembly.
  • the anode electrode piece of the first electrode assembly is the first target electrode piece.
  • the anode electrode of the second electrode assembly is the first target electrode.
  • the cathode electrode piece of the first electrode assembly is the second target electrode piece.
  • Step 120 determining whether the anode electrode piece Lc of the first electrode assembly is greater than the detection length Ld of the anode electrode piece of the second electrode assembly.
  • the anode electrode piece of the first electrode assembly is the first target electrode piece.
  • the anode electrode piece of the second electrode assembly is the second target electrode piece.
  • Step 130 performing final control based on the detected lengths of the cathode electrode piece and the anode electrode piece of the first electrode assembly and the detected lengths of the cathode electrode piece and the anode electrode piece of the second electrode assembly.
  • Step 140 finishing the first electrode assembly and the second electrode assembly.
  • the cutting member 240 cuts off the cathode electrode piece of the first electrode assembly and the cathode electrode piece of the second electrode assembly; and cuts off the anode electrode piece of the first electrode assembly and the anode electrode piece of the second electrode assembly.
  • pole pieces can be saved to a certain extent, thereby reducing the production cost of the electrode assembly.
  • the buffer component 250 buffers the electrode pieces of the second length for the corresponding cathode electrode piece and anode electrode piece, respectively. Furthermore, when the detection length of the anode electrode piece is at least longer than the detection length of the cathode electrode piece by b, the cutting component 240 cuts off the cathode electrode piece and the anode electrode piece.
  • the buffer component 250 includes a plurality of buffer subcomponents 250a-250b corresponding to the plurality of pole pieces 201a-201b; wherein each buffer subcomponent is used to buffer the corresponding pole piece.
  • the plurality of pole pieces 201a-201b can be better buffered, so that the pole pieces from the same material roll in the plurality of electrode assemblies have closer lengths.
  • the multiple cache sub-components 250a-250b can be the same cache mechanism or different cache mechanisms.
  • each cache subcomponent includes a plurality of fixed rollers 251a and a plurality of movable rollers 252b, the plurality of fixed rollers 251a and the plurality of movable rollers 252b are respectively located on both sides of the pole piece, at least one movable roller 252b among the plurality of movable rollers 252b moves toward one side D1 of the plurality of fixed rollers 251a to cache the pole segments of the corresponding pole piece, and the number of the plurality of fixed rollers 251a is greater than or equal to the number of the plurality of movable rollers 252b. In this way, the pole segments of the corresponding pole piece can be cached simply, flexibly and accurately.
  • the buffer component 250 includes a first buffer subcomponent 250a and a second buffer subcomponent 250b.
  • the first buffer subcomponent 250a includes X1 fixed rollers 251a and N1 movable rollers 252b; at least one movable roller 252b of the N1 movable rollers 252b is used to move toward a side D1 of the X1 fixed rollers 251a to buffer a first length of the first pole piece 201a, X1>N1, X1 and N1 are positive integers.
  • X1 and N1 may also be N1+1 ⁇ X1 ⁇ 2N1.
  • the N1 movable rollers 252b moves toward one side D1 of the X1 fixed rollers 251a, which means that at least one of the N1 movable rollers 252b may exceed the X1 fixed rollers 251a, or may not exceed the X1 fixed rollers 251a, which needs to be determined according to actual conditions.
  • the greater the distance that the movable roller 252b moves toward the side D1 of the X1 fixed rollers 251a the longer the length of the cached first pole piece 201a.
  • the N1 movable rollers 252b can be connected as one and driven simultaneously, or can be driven separately, and a movable roller structure with a number less than two movable rollers is preferred.
  • At least one of the N1 movable rollers 252b is further used to move toward the X1 fixed rollers 251a when the second tension adjustment subcomponent 270b is in a limited state, so as to cache the pole segment of the second length of the first pole piece 201a.
  • the pole segment of the second length of the first pole piece 201a can be cached simply, flexibly and accurately.
  • the second buffer subcomponent 250b includes X2 fixed rollers 251b and N2 movable rollers 252b; at least one movable roller 252b of the N2 movable rollers 252b is used to move toward the direction of the X2 fixed rollers 251b to buffer the first length of the pole segment of the second pole piece 201b, X2>N2, X2 and N2 are positive integers. In this way, the first length of the pole segment of the second pole piece 201b can be simply, flexibly and accurately buffered.
  • the relationship between X2 and N2 can also be N2+1 ⁇ X2 ⁇ 2N2.
  • the movement of at least one of the N2 movable rollers 252b toward one side D1 of the X2 fixed rollers 251b indicates that at least one of the N2 movable rollers 252b may exceed the X2 fixed rollers 251b, or may not exceed the X2 fixed rollers 251b, which needs to be determined according to actual conditions.
  • the greater the distance that the movable roller 252b moves toward the direction of the X2 fixed rollers 251b the longer the length of the cached second pole piece 201b.
  • the N2 movable rollers 252b can be connected as one and driven simultaneously, or can be driven separately, and a movable roller 252b structure with a number less than two movable rollers 252b is preferred.
  • At least one of the N2 movable rollers 252b is further used to move toward the X2 fixed rollers 251b when the first tension adjustment subcomponent 270a is in a limited state, so as to cache the second length of the pole segment of the second pole piece 201b. In this way, the second length of the pole segment of the second pole piece 201b can be cached simply, flexibly and accurately.
  • each buffer sub-component includes an embossing roller, and the embossing roller is used to set convex points on the corresponding pole piece to buffer the pole segment of the pole piece. In this way, the pole segment of the pole piece can be conveniently buffered.
  • Each buffer subcomponent may include a rubber roller and an embossing roller, and the embossing roller may provide convex points on the corresponding pole piece to increase the thickness of the convex point area of the corresponding pole piece.
  • the thickness of the convex point area is positively correlated with the first length, and the thickness of the convex point area is also positively correlated with the second length.
  • the cache component 250 includes a first cache subcomponent 250a and a second cache subcomponent 250b as an example for explanation.
  • the first cache subcomponent 250a includes a first rubber roller 254a and a first embossing roller 253a (also referred to as embossing roller 253a), and the first embossing roller 253a is used to set convex points on the first pole piece 201a to cache the first length of the pole segment of the first pole piece 201a.
  • the first embossing roller 253a is also used to set convex points on the first pole piece 201a to cache the second length of the pole segment of the first pole piece 201a when the second tension adjustment subcomponent 270b is in a limited state. In this way, the second length of the pole segment of the first pole piece 201a can be conveniently cached.
  • the height of the bumps set by the first embossing roller 253a on the first pole piece 201a is also different depending on the state of the first tension adjusting subcomponent 270a, and thus the thickness of the bump area of the first pole piece 201a is also different.
  • the second buffer subcomponent 250b includes a second embossing roller 253b (also referred to as embossing roller 253b), which is used to set convex points on the second pole piece 201b to buffer the pole segment of the first length of the second pole piece 201b. In this way, the pole segment of the first length of the second pole piece 201b can be conveniently buffered.
  • a second embossing roller 253b also referred to as embossing roller 253b
  • the second buffer component 250 may include a second rubber roller 254b and a second embossing roller 253b, and the second embossing roller 253b may set convex points on the second pole piece 201b to increase the thickness of the convex point area of the second pole piece 201b.
  • the thickness of the convex point area is positively correlated with the pole segment of the first length of the second pole piece 201b.
  • the second embossing roller 253b is further used to set a convex point on the second pole piece 201b to cache the pole segment of the second length of the second pole piece 201b when the second tension adjusting subcomponent 270b is in a limited state. In this way, the pole segment of the second length of the second pole piece 201b can be conveniently cached.
  • the height of the protrusions set by the second embossing roller 253b on the second pole piece 201b is also different depending on the state of the second tension adjusting subcomponent 270b, and thus the thickness of the protrusion area of the second pole piece 201b is also different.
  • each tension adjustment sub-component includes two fixed rollers and movable rollers respectively located on both sides of a line M connecting the two fixed rollers, wherein when each tension sub-component is in a limited state, along a direction D2 perpendicular to the line M, the distance between the fixed roller and the movable roller is within a preset range P1.
  • the preset range P1 is determined according to actual conditions. Moreover, by setting the preset range, the distance between the fixed roller and the movable roller can be controlled, thereby reducing the probability of damage to the tension adjustment subcomponent.
  • the tension adjustment component 270 includes a first tension adjustment subcomponent 270a and a second tension adjustment subcomponent 270b.
  • the first tension adjustment subcomponent 270a includes two fixed rollers and two movable rollers;
  • the second tension adjustment subcomponent 270b includes two fixed rollers and two movable rollers;
  • the first tension adjustment subcomponent 270a is in a limited state when the distance between the two fixed rollers and the two movable rollers is within a preset range P1;
  • the second tension adjustment subcomponent 270b is in a limited state when the distance between a plurality of fixed rollers in the two fixed rollers and the two movable rollers is within a preset range P1.
  • the length of the pole piece in the first tension adjusting subcomponent 270a and the second tension adjusting subcomponent 270b is the length of the pole piece between the fixed roller and the movable roller.
  • the pole piece length between the first movable roller 272a and the first fixed roller 271a is the maximum pole piece length corresponding to the first tension adjusting subcomponent
  • the difference between the pole piece length between the first movable roller 272a and the first fixed roller 271a and the pole piece length within the preset range P1 is the maximum pole piece length change corresponding to the first tension adjusting subcomponent 270a.
  • the pole piece length between the second movable roller 272b and the second fixed roller 271b is the maximum pole piece length corresponding to the second tension adjusting subcomponent 270b
  • the difference between the pole piece length between the second movable roller 272b and the second fixed roller 271b and the pole piece length within the preset range P1 is the maximum pole piece length variation corresponding to the second tension adjusting subcomponent 270b.
  • the device for synchronously winding the electrode assembly is adjusted accordingly according to the description of the above embodiment.
  • the first movable roller 272a is affected by the buffer component 250 and moves toward the direction D2 of the first fixed roller 271a.
  • the second movable roller 272b is affected by the buffer component 250 and moves toward the direction D2 of the second fixed roller 271b.
  • the first target pole piece may be any pole piece among the multiple pole pieces 210a-210b except the reference pole piece, or may be a pole piece that meets the requirements among the multiple pole pieces 210a-210b except the reference pole piece.
  • the difference between the detection length of the first target electrode piece and the detection length of the reference electrode piece is greater than a preset value.
  • the buffer component 250 can reduce the detection length of the first target electrode piece to a certain extent.
  • the number of times the pole piece is cached can be increased, thereby improving the efficiency of the synchronously wound electrode assembly under the premise that the detection lengths of multiple pole pieces are basically equal.
  • the preset value may be determined according to the accuracy of a length detection component (eg, encoder 260) for detecting the plurality of pole pieces 210a-210b.
  • a length detection component eg, encoder 260
  • the preset value is between 1 mm and 2 mm. In this way, a balance can be achieved between substantially equal detection lengths of multiple pole pieces and the efficiency of the synchronously wound electrode assembly.
  • the cache component is also used to cache the first target pole piece when the detected length of the first target pole piece meets a preset length, wherein the preset length is determined based on standard lengths of multiple pole pieces.
  • the preset length can be determined according to the standard lengths of the plurality of pole pieces and the maximum buffering capacity of the buffer component 250.
  • the difference between the preset length and the standard lengths of the plurality of pole pieces can be any value between 10 mm and 15 m, for example, 10 mm, 20 mm, 1 m, 5 m, 10 m, 11 m, 12 m, 14 m, 15 m, etc.
  • the maximum buffering capacity of the buffer component 250 can be determined according to the movable distance between the movable roller 252b and the fixed roller 251a.
  • the detection length of the first target pole piece will also change in different regularities. Therefore, when the first target pole piece meets the preset length, that is, when the detection length of the first target pole piece is close to the standard length of multiple pole pieces, the first target pole piece can be cached. This can reduce the number of times the cache component caches the first target pole piece to a certain extent, thereby improving the efficiency of the synchronously wound electrode assembly.
  • the cache component 250 can cache the first target electrode piece when the number of turns of the electrode piece in the synchronously wound electrode assembly is within a preset number of turns, wherein the preset number of turns is determined according to the number of turns of the qualified electrode assembly.
  • the number of turns of the electrode assembly is related to the standard length of multiple pole pieces.
  • FIG. 15 shows a flow chart of a method for synchronously winding an electrode assembly provided in an embodiment of the present application.
  • the method 400 for synchronously winding an electrode assembly includes the following contents.
  • Step 410 determining a first target pole piece among the multiple synchronously wound pole pieces 201a-201b, wherein the first target pole piece is a pole piece among the multiple pole pieces except a reference pole piece, and the reference pole piece is a pole piece having the longest detection length among the multiple pole pieces.
  • Step 420 cache the first target pole piece.
  • Step 430 when the first target pole piece is cached, cutting off the plurality of pole pieces 201 a - 201 b .
  • the detected lengths of the plurality of pole pieces 201 a - 201 b represent the lengths of the pole pieces to be wound in the plurality of electrode assemblies.
  • the first target electrode piece is the first electrode piece 201a; if the diameter of the second electrode assembly is smaller than the diameter of the second electrode assembly, the first target electrode piece is the first electrode piece 201a; The first target electrode piece is the second electrode piece 201b.
  • the first target electrode piece is cached, for example, when the first electrode piece 201a is cached, the first electrode piece 201a and the second electrode piece 201b are cut off to obtain two electrode assemblies with similar electrode piece lengths, and the number of turns of the first electrode piece 201a of the first electrode assembly is greater than the number of turns of the second electrode piece 201b of the second electrode assembly.
  • the embodiment of the present application proposes a method 400 for synchronously winding electrode assemblies, which caches a first target electrode piece other than the electrode piece with the longest detection length among multiple electrode pieces 201a-201b, and cuts off multiple electrode pieces 201a-201b when the first target electrode piece is cached.
  • the detection length of the electrode pieces in the electrode assemblies other than the electrode assembly with the largest diameter can be increased, so that the use lengths of the electrode pieces from the same material roll in multiple electrode assemblies are closer, thereby reducing the adverse effects of unstable factors on the synchronously wound electrode assemblies, reducing the probability of downtime of the synchronous winding device, and improving the production speed of the electrode assemblies.
  • caching the first target pole piece includes: caching a pole segment of a first length of the first target pole piece, wherein the difference between the detected length of the first target pole piece and the detected length of the reference pole piece.
  • the method 400 for synchronously winding an electrode assembly further includes: when a tension adjustment subcomponent corresponding to a first target pole piece is in a limited state, caching a pole segment of a second length of a second target pole piece among a plurality of pole pieces 210a-210b, wherein the tension adjustment subcomponent is used to adjust the tension of the corresponding pole piece; the second target pole piece is a pole piece corresponding to the tension adjustment subcomponent in a non-limited state; and when the second target pole piece is cached, cutting off a plurality of pole pieces.
  • the second length is determined according to a variation range of the pole piece length corresponding to the tension adjustment subcomponent.
  • the second length is one third to two thirds of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the second length is half of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the second length is determined based on the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the method further includes: determining the cutting length of the corresponding anode pole piece based on the cache length of the cathode pole piece corresponding to the tension adjustment subcomponent in the limited state.
  • the cut-off length of the anode pole piece is determined by the buffer length of the cathode pole piece, the standard length of the anode pole piece, and the difference between the detection lengths of different anode pole pieces.
  • the cut-off length of the anode pole piece is equal to the sum of the buffer length of the cathode pole piece, the standard length of the anode pole piece and the difference between N times the detection lengths between different anode pole pieces.
  • the difference between the detection length of the first target pole piece and the detection length of the reference pole piece is greater than a preset value.
  • the preset value is between 1 mm and 2 mm.
  • caching the first target pole piece includes: caching the first target pole piece when the detected length of the first target pole piece meets a preset length, wherein the preset length is determined based on standard lengths of multiple pole pieces.
  • Fig. 16 shows a block diagram of another synchronously wound electrode assembly device provided by an embodiment of the present application.
  • the synchronously wound electrode assembly device 600 includes: a determination module 610, the determination module 610 is used to determine the first target electrode piece among the multiple synchronously wound electrode pieces, the first target electrode piece is the electrode piece other than the reference electrode piece among the multiple electrode pieces, and the reference electrode piece is the electrode piece with the longest detection length among the multiple electrode pieces; a cache module 620, the cache module 620 is used to cache the first target electrode piece; and a cutting module 630, the cutting module 630 is used to cut off the multiple electrode pieces when the first target electrode piece is cached.
  • the cache module 620 is also used to cache a pole segment of a first length of a first target pole piece, wherein the difference between the detected length of the first target pole piece and the detected length of the reference pole piece.
  • the cache module 620 is also used to cache a pole segment of a second length of a second target pole piece among multiple pole pieces 210a-210b when the tension adjustment subcomponent corresponding to the first target pole piece is in a limited state, wherein the tension adjustment subcomponent is used to adjust the tension of the corresponding pole piece; the second target pole piece is a pole piece corresponding to the tension adjustment subcomponent in a non-limited state; and when the second target pole piece is cached, multiple pole pieces are cut off.
  • the determination module 610 is further configured to determine the second length according to a range of variation of the pole piece length corresponding to the tension adjustment subcomponent.
  • the determination module 610 is further configured to determine the second length according to one third to two thirds of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the determination module 610 is further configured to determine the second length according to half of the maximum pole piece length variation corresponding to the tension adjustment subcomponent.
  • the second length is determined based on the minimum value of the pole piece lengths corresponding to the multiple tension adjustment subcomponents in the limited state.
  • the determination module 610 is also used to determine the cutting length of the corresponding anode pole piece according to the cache length of the cathode pole piece corresponding to the tension adjustment subcomponent in the limited state, when the pole piece corresponding to the tension adjustment subcomponent in the limited state is the cathode pole piece.
  • the determination module 610 is further used to determine the cut-off length of the anode pole piece based on the difference between the cache length of the cathode pole piece, the standard length of the anode pole piece and the detection lengths between different anode pole pieces.
  • the cut-off length of the anode pole piece is equal to the sum of the buffer length of the cathode pole piece, the standard length of the anode pole piece and the difference between N times the detection lengths between different anode pole pieces.
  • the difference between the detection length of the first target pole piece and the detection length of the reference pole piece is greater than a preset value.
  • the preset value is between 1 mm and 2 mm.
  • the cache module 620 is also used to cache the first target pole piece when the detection length of the first target pole piece meets a preset length, wherein the preset length is determined based on standard lengths of multiple pole pieces.
  • An embodiment of the present application also provides a computer-readable storage medium, including a computer program, which, when executed on a computer, enables the computer to execute instructions for the steps in the above-mentioned method for synchronously winding an electrode assembly.
  • the computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

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Abstract

本申请实施例提供一种同步卷绕电极组件的装置及其方法、计算机存储介质,其中,装置包括:卷绕部件、切断部件和缓存部件:其中,缓存部件位于切断部件和卷绕部件之间;卷绕部件用于同步卷绕多个极片;缓存部件用于对多个极片中的第一目标极片进行缓存,其中,第一目标极片为多个极片中参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片;切断部件用于在第一目标极片被缓存的情况下,切断多个极片。这样,同步卷绕电极组件的装置及其方法、计算机存储介质能够降低不稳定因素对同步卷绕电极组件产生的影响,减小同步卷绕装置宕机的概率,提高了电极组件的生产速度。

Description

同步卷绕电极组件的装置及其方法、计算机存储介质 技术领域
本申请涉及电极组件卷绕技术领域,特别是涉及一种同步卷绕电极组件的装置及其方法、计算机存储介质。
背景技术
随着电极组件的生产工艺的发展,可以对同步卷绕电极组件,以加快电极组件的生产速度。但是,在同步卷绕电极组件时,由于不稳定因素的影响,例如,不同电极组件中的隔离膜的厚度出现波动,使得多个电极组件的同性极片虽然来自同一料卷,但多个电极组件的半径的变化规律不同,从而对同步卷绕电极组件的装置产生不利影响,严重时还会引起同步卷绕装置的宕机,降低了电极组件的生产速度。
发明内容
本申请实施例提供了一种同步卷绕电极组件的装置及其方法、计算机存储介质,能够降低不稳定因素对同步卷绕电极组件产生的不利影响,减小同步卷绕装置宕机的概率,提高了电极组件的生产速度。
第一方面,提供了一种同步卷绕电极组件的装置,包括:卷绕部件、切断部件和缓存部件:其中,缓存部件位于切断部件和卷绕部件之间;卷绕部件用于同步卷绕多个极片;缓存部件用于对多个极片中的第一目标极片进行缓存,其中,第一目标极片为多个极片中参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片;切断部件用于在第一目标极片被缓存的情况下,切断多个极片。
在本申请实施例中,通过缓存部件将与第一目标极片对应的电极组件中的多余的极片缓存在切断部件和卷绕部件之间,使得多个电极组件中来自同一料卷的极片的使用长度更加接近,从而降低不稳定因素对同步卷绕电极组件产生的影响,降低了同步卷绕装置宕机的概率,提高了电极组件的生产速度。
在本申请的一些实施例中,缓存部件用于缓存第一目标极片的第一长度的极片段,其中,第一长度为第一目标极片的检测长度与参考极片的检测长度的差值。
在本申请实施例中,通过第一目标极片的检测长度与参考极片的检测长度的差值确定缓存部件对第一目标极片的缓存情况,能够准确地将多余的极片补偿至相应的电极组件的尾部,从而使得多个电极组件所用的极片的长度更加接近。
在本申请的一些实施例中,同步卷绕电极组件的装置还包括:张力调节部件,张力调节部件用于调节多个极片的张力;其中,张力调节部件位于切断部件的上游。这样,可以使得多个极片的传输过程具备相应张力,有利于获得更好的卷绕效果。
在本申请的一些实施例中,张力调节部件包括与多个极片对应的多个张力 调节子部件,其中,每个张力调节子部件用于调节对应的极片的张力。
在本申请实施例中,由于每个张力调节子部件对相应的极片进行张力调节的同时,也能够对相应的极片的极片段进行缓存。因此,在缓存部件未对第一目标极片进行缓存时,可以将多余的极片缓存在对应的张力调节子部件上,从而进一步降低极片在传输过程堆积的概率,有利于同步卷绕电极组件的装置的正常运行。
在本申请的一些实施例中,在第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存部件用于缓存第二目标极片的第二长度的极片段,第二目标极片为处于非限位状态的张力调节子部件对应的极片。
在本申请实施例中,由于受机械误差的影响,缓存部件对第一目标极片实际缓存的长度通常大于第一长度,这将使得张力调节子部件偏离正常状态,并且,若缓存部件多次对第一目标极片缓存的长度大于第一长度时,对应张力调节子部件将越来越偏离正常状态,从而达到限位状态,为了使得处于非限位状态的张力调节子部件对应的极片的长度与处于限位状态的张力调节子部件对应的极片的长度相等,可以对第二目标极片的第二长度的极片段进行缓存。这样,可以降低机械误差对同步卷绕电极组件的装置产生的不良影响。
在本申请的一些实施例中,第二长度是根据张力调节子部件对应的极片长度变化范围确定的。
在本申请实施例中,缓存部件对第一目标极片的缓存误差可以通过张力调节子部件对应的极片长度变化范围确定。因此,通过该极片长度变化范围确定第二长度,可以根据实际情况补偿相应的机械误差,能够较好地补偿机械误差。
在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的三分之一至三分之二。
在本申请实施例中,由于张力调节部件通常是从正常工作状态变为限位状态,则张力调节部件对应的极片的长度的变化量通常为三分之一至三分之二的最大极片长度。这样,不仅可以使用大多数工况,还可以较为准确地补偿机械误差,获得更好的卷绕效果。
在本申请的一些实施例中,第二长度为张力调节部件对应的最大极片长度变化量的一半。
在本申请实施例中,由于张力调节部件处于常用工况时对应的极片长度为最大极片长度变化量的一半的情况。并且,在通常情况下,张力调节部件基本处于常用工况。也就是说,由于机械误差的存在,张力调节部件将从常用工况状态变成限位状态,以及张力调节部件对应的极片的长度的变化量通常为张力调节部件对应的最大极片长度变化量的一半。因此,可以更准确地补偿机械误差,获得更好的卷绕效果。
在本申请的一些实施例中,在多个第一目标极片对应的张力调节子部件处于限位状态的情况下,第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
在本申请实施例中,虽然多个第一目标极片对应的张力调节子部件均处于限位状态,但是由于受缓存部件的机械误差的影响不同,处于限位状态的张力调节子 部件对应的极片长度也不同。并且,处于限位状态的张力调节子部件对应的极片长度越短,受缓存部件的机械误差的影响越大,为了更好的弥补机械误差,第二长度可以根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定。
在本申请的一些实施例中,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,切断部件还用于:基于阳极极片的切断长度,切断对应的阳极极片,阳极极片的切断长度是基于处于限位状态的张力调节子部件对应的阴极极片的缓存长度确定的。这样,可以使得阳极极片的切断的长度比阴极极片切断的长度至少长b,能够提高电极组件的合格率。其中,b为标准的电极组件中阳极极片的长度与阴极极片的长度的差值。
在本申请的一些实施例中,阳极极片的切断长度是由第二目标极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。这样,可以在处于限位状态的张力调节子部件对应的极片为阴极极片,且多个电极组件之间的阳极极片的检测长度不同的情况下,也可以获得多个满足标准的电极组件,提高了电极组件的合格率。
在本申请的一些实施例中,阳极极片的切断长度等于第二目标极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。这样,可以增加阳极极片的长度,进一步增加满足标准的电极组件,进一步提高了电极组件的合格率。
在本申请的一些实施例中,缓存部件包括与多个极片对应的多个缓存子部件;其中,每个缓存子部件用于缓存对应的极片。这样,可以对每个极片进行相应的缓存,不仅可以使用更多的工作场景,还可以使得多个电极组件中来自同一料卷的极片的使用的长度更加接近。
在本申请的一些实施例中,每个缓存子部件包括多个定辊和多个动辊,多个定辊和多个动辊分别位于极片的两侧,多个动辊中的至少一个动辊朝向多个定辊的一侧移动,以缓存对应的极片的极片段,多个定辊的数量大于或者等于多个动辊的数量。这样,可以简单、灵活、准确地缓存极片的极片段。
在本申请的一些实施例中,每个缓存子部件包括压花辊,压花辊用于在对应的极片上设置凸点,以缓存所述极片的极片段。这样,可以便捷地缓存极片的极片段。
在本申请的一些实施例中,每个张力调节子部件包括两个定辊、以及分别位于两个定辊连线两侧的动辊;其中,每个张力子部件在处于限位状态的情况下,沿垂直于连线的方向,定辊与动辊之间的距离位于预设范围内。这样,通过动辊和定辊的相互配合,便于给多个正在卷绕的电极组件中的极片提供张力;并且,根据动辊和定辊的相对位置,便于确定张力调节部件相应的状态。
在本申请的一些实施例中,第一目标极片的检测长度与参考极片的检测长度的差值大于预设值。这样,可以在一定程度上降低缓存部件对第一目标极片缓存的次数,从而可以在多个极片的检测长度基本相等的前提下,提高同步卷绕电极组件的效率。
在本申请的一些实施例中,预设值位于1mm至2mm之间。这样,可以在多个极片的检测长度基本相等与同步卷绕电极组件的效率之间得到平衡。
在本申请的一些实施例中,缓存部件还用于在第一目标极片的检测长度满足预设长度的情况下,对第一目标极片进行缓存,其中,预设长度是根据多个极片的标准长度确定的。
在本申请实施例中,由于隔离膜的厚度会出现波动,则第一目标极片的检测长度也会出现不同规律的变化,因此,可以在第一目标极片满足预设长度的情况下,也就是说,在第一目标极片的检测长度接近多个极片的标准长度的情况下,对第一目标极片进行缓存,能够在一定程度上降低缓存部件对第一目标极片缓存的次数,提高同步卷绕电极组件的效率。
第二方面,提出了一种同步卷绕电极组件的方法,该方法包括:确定同步卷绕的多个极片中的第一目标极片,第一目标极片为多个极片中除参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片;缓存第一目标极片;在第一目标极片被缓存的情况下,切断多个极片。
本申请实施例中,可以在多个正在卷绕的电极组件的直径不相等的情况下,增加除具有最大直径的电极组件以外的电极组件中极片的检测长度,从而使得多个电极组件中来自同一料卷的极片的使用长度更加接近,从而降低不稳定因素对同步卷绕电极组件产生的不利影响,减小同步卷绕装置宕机的概率,提高了电极组件的生产速度。
可选地,在本申请的一些实施例中,缓存第一目标极片,包括:缓存第一目标极片的第一长度的极片段,其中,第一目标极片的检测长度与参考极片的检测长度的差值。
可选地,在本申请的一些实施例中,同步卷绕电极组件的方法还包括:在第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存多个极片中的第二目标极片的第二长度的极片段,其中,张力调节子部件用于调节对应的极片的张力;第二目标极片为处于非限位状态的张力调节子部件对应的极片;在第二目标极片被缓存的情况下,切断多个极片。
可选地,在本申请的一些实施例中,第二长度是根据张力调节子部件对应的极片长度变化范围确定的。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的三分之一至三分之二。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的一半。
可选地,在本申请的一些实施例中,在多个第一目标极片对应的张力调节子部件处于限位状态的情况下,第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
可选地,在本申请的一些实施例中,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,方法还包括:根据限位状态的张力调节子部件对应的 阴极极片的缓存长度,确定对应的阳极极片的切断长度。
可选地,在本申请的一些实施例中,阳极极片的切断长度是由阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。
可选地,在本申请的一些实施例中,阳极极片的切断长度等于阴极极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
可选地,在本申请的一些实施例中,第一目标极片的检测长度与参考极片的检测长度的差值大于预设值。
可选地,在本申请的一些实施例中,预设值位于1mm至2mm之间。
可选地,在本申请的一些实施例中,缓存第一目标极片,包括:在第一目标极片的检测长度满足预设长度的情况下,缓存第一目标极片,其中,预设长度是根据多个极片的标准长度确定的。
第三方面,提供了一种同步卷绕电极组件的装置,该装置包括确定模块,确定模块用于确定同步卷绕的多个极片中的第一目标极片,第一目标极片为多个极片中除参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片;缓存模块,缓存模块用于缓存第一目标极片;切断模块,切断模块用于在第一目标极片被缓存的情况下,切断多个极片。
第四方面,提供了一种计算机可读存储介质,包括计算机程序,当计算机程序在计算机上运行时,使得计算机执行上述第二方面或第二方面的任一可能的实施方式中的同步卷绕电极组件的方法。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对本申请实施例中所需要使用的附图作简单地介绍,显而易见地,下面所描述的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据附图获得其他的附图。
图1示出了本申请实施例提供的一种卷绕设备的示意性结构图;
图2示出了本申请实施例提供的一种同步卷绕电极组件的装置的局部的正视的示意性结构图;
图3示出了本申请实施例提供的一种同步卷绕电极组件的装置的另一局部的正视的示意性结构图;
图4示出了图3所示的同步卷绕电极组件的装置的局部的俯视的示意性结构图;
图5示出了本申请实施例的一种编码器的结构示意图;
图6示出了本申请实施例提供的另一种同步卷绕电极组件的装置的局部正视的示意性结构图;
图7示出了本申请实施例提供的一种张力调节部件的结构示意图;
图8示出了本申请实施例提供的一种多个极片的检测长度的关系的示意图;
图9示出了本申请实施例提供的另一种多个极片的检测长度的关系的示意 图;
图10示出了本申请实施例提供的又一种多个极片的检测长度的关系的示意图;
图11示出了本申请实施例提供的一种缓存子部件的结构示意图;
图12示出了本申请实施例提供的另一种缓存子部件的结构示意图;
图13示出了本申请实施例提供的一种张力调节子部件的结构示意图;
图14示出了本申请实施例提供的另一种张力调节子部件的结构示意图;
图15示出了本申请实施例提供的一种同步卷绕电极组件的方法的流程图;
图16示出了本申请实施例提供的一种同步卷绕电极组件的装置的方框示意图。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理,但不能用来限制本申请的范围,即本申请不限于所描述的实施例。
应理解,本文中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例,而非限制本申请实施例的范围。
还应理解,在本申请的各种实施例中,各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。
还应理解,本说明书中描述的各种实施方式,既可以单独实施,也可以组合实施,本申请实施例对此并不限定。
除非另有说明,本申请实施例所使用的所有技术和科学术语与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,不是旨在限制本申请的范围。本申请所使用的术语“和/或”包括一个或多个相关的所列项的任意的和所有的组合。
本申请中,电极组件由正极片、负极片和隔膜组成。正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集流体凸出于已涂覆正极活性物质层的集流体,未涂敷正极活性物质层的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集流体凸出于已涂覆负极活性物质层的集流体,未涂敷负极活性物质层的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。隔膜的材质可以为聚丙烯(Polypropylene,PP)或聚乙烯(Polyethylene,PE)等。
其中,电极组件可以为卷绕式结构。可选地,该卷绕式结构的电极组件整体可呈现圆柱形,该圆柱形的电极组件配合于圆柱形的壳体,整体可形成圆柱形的电池单体。
在通常的技术方案中,卷绕装置对一组正极片、负极片以及隔膜进行卷绕,形成一个电极组件,完成该一个电池组件后,再继续对一组正极片、负极片以及隔膜进行卷绕形成下一个电池组件。该技术方案的电池组件的生产效率较低,不利于提高电池单体以及电池的生产效率。
因此,随着电极组件的生产工艺的发展,可以对多个电极组件同时卷绕,以加快电极组件的生产速度。例如,可以沿同一料卷的极片的长度方向进行切割,以获得多个极片,例如,第一极片和第二极片;多个极片经过多个辊被送到卷针上进行同步卷绕,以获得多个电极组件。
但是,由于不稳定因素的影响,例如,多个电极组件中的隔离膜的厚度不同,其中,隔离膜的厚度范围通常为10~30um,不同卷的隔离膜和同一卷的隔离膜的厚度波动一般呈现±1um的波动情况。这样,受隔离膜厚度等因素的影响,将导致多个电极组件的半径的变换规律也不同。也就是说,相同时间内,多个电极组件来料侧的极片的长度基本相等,而多个电极组件使用的极片的长度不同,这样,可能会导致部分极片在多个辊之间或者料带上产生堆积,将对同步卷绕电极组件产生不利影响。并且,当极片的堆积量过多时,还会引起同步卷绕装置的宕机,降低了电极组件的生产速度。
基于上述考虑,本申请实施例提出了一种同步卷绕电极组件的装置,该装置通过缓存部件将与第一目标极片对应的电极组件中的多余的极片缓存在切断部件和卷绕部件之间,使得多个电极组件中来自同一料卷的极片的使用的长度更加接近,从而降低不稳定因素对同步卷绕电极组件产生的不利影响,也降低了同步卷绕装置宕机的概率,提高了电极组件的生产速度。
图1示出了本申请实施例提供的一种卷绕设备的示意性结构图。
如图1所示,第一放卷部件211中可设置有能够转动的转轴,该转轴上设置有层层卷绕的极片201(料卷)。当该转轴在驱动力的作用下转动时,转轴上卷绕的极片201呈平展态输出,该第一放卷部件211完成放料动作。其中,极片201为阴极极片或者阳极极片。
为了接收并传送该第一放卷部件211输出的极片201,该第一放卷部件211的下游可设置有传送部件,例如,如图1中所示的多个辊结构,或者传送带等等。该传送部件可贯穿卷绕设备20中多个加工部件,以实现极片201在卷绕设备20中的流动传送。
第一分切部件220设置于第一放卷部件211的下游,其用于接收来自于第一放卷部件211输出的极片201,并将该极片201沿其长度方向切割成第一极片201a和第二极片201b。
卷绕部件230设置于第一分切部件220的下游。当第一分切部件220对极片201切割为第一极片201a和第二极片201b后,该第一极片201a和第二极片201b可同时被传送部件传动,并到达卷绕部件230。
该卷绕部件230具有能够同时卷绕运动的第一卷绕部和第二卷绕部,该第一卷绕部和第二卷绕部用于分别接收第一极片201a和第二极片201b。且该第一卷绕部和第二卷绕部可同时对该第一极片201a、第二极片201b和隔离膜进行卷绕,以分别形成第一电极组件和第二电极组件。
图2示出了本申请实施例提供的一种同步卷绕电极组件的装置的局部的正视的示意性结构图。图3示出了本申请实施例提供的一种同步卷绕电极组件的装置的另一局部的正视的示意性结构图。图4示出了图3所示的同步卷绕电极组件的装置的另一局部的俯视的示意性结构图。
如图2所示,该装置包括卷绕部件230、切断部件240和缓存部件250:其中,缓存部件250位于切断部件240和卷绕部件230之间;卷绕部件230用于同步卷绕多个极片201a-201b;缓存部件250用于对多个极片201a-201b中的第一目标极片进行缓存,其中,第一目标极片为多个极片201a-201b中除参考极片以外的极片,参考极片为多个极片201a-201b中具有最长的检测长度的极片;切断部件240用于在第一目标极片被缓存的情况下,切断多个极片201a-201b。
其中,卷绕部件230可以由同一套驱动元件驱动,优选伺服电机,且多个电极组件的卷绕角度总和保持一致。应理解,卷绕部件230还用于卷绕隔离膜,也就是说,卷绕部件通过卷绕两个极性不同的极片和隔离膜,以形成电极组件。切断部件240包括定刀和动刀。切断部件240在切断多个极片201a-201b时,可以通过定刀和动刀在相对多个极片201a-201b静止的状态时,通过啮合切断多个极片201a-201b。其中,相对静止可以是多个极片201a-201b停止下来,也可以是多个极片201a-201b仍在运动,切断部件240沿多个极片201a-201b的运动方向上加速,以便切断部件240的速度和多个极片201a-201b的速度相等。
应理解,多个极片201a-201b的极性相同。并且,多个极片201a-201b的检测长度可以通过编码器260确定。例如,如图2至图5所示,编码器260可以位于切断部件240和缓存部件250的上游。可以通过编码器260上的数值,确定第一目标极片。其中,编码器260包括计数器261、极片压辊262、编码辊263和编码辊安装固定端264。在实际应用中,编码辊263通过安装固定端264安装于设备大板,极片经过时会带动编码辊263转动,编码辊263带动计数器261,即计数器261记忆圈数与编码辊263周长的乘积,便是多个极片201a-201b的检测长度。
在一些实施例中,多个极片201a-201b的检测长度也可以是对应的多个电极组件中的极片卷绕的长度。其中,电极组件中的极片卷绕的长度可以根据编码器260上的值计算得到,也可以识别电极组件的圈数,并根据每圈的直径确定。
缓存部件250用于将原本不会卷绕至直径较小的电极组件中的极片缓存在切断部件240和卷绕部件230之间。也就是说,缓存部件250用于将直径较小的电极组件中的多余的极片缓存在切断部件240和卷绕部件230之间。举例说明,若第一目标极片为201a,参考极片为201b,缓存部件250可以通过增加缓存部件250中第一目标极片201a的长度,以实现对第一目标极片201a的缓存。其中,缓存部件250可以对 第一目标极片201a施加垂直于第一目标极片201a传送方向的力,以改变第一目标极片201a的传输路径,或者,改变第一目标极片201a的形态。
在多余的极片缓存在切断部件240和卷绕部件230之间的情况下,切断部件240切断多个极片201a-201b,以便多个电极组件使用的极片的长度更加接近。
需要说明的是,图2至图5示出了多个极片的数量为2的情况,但是,该数量并不对多个极片的数量进行限制,例如,多个极片的数量可以为3、4、5等。也就是说,多个极片的数量为大于或者等于2的整数。下面,将以同步卷绕2个电极组件为例进行说明。
举例说明,控制器确定第一极片201a上的编码器260的值小于第二极片201b上的编码器260的值,也就是说,第一电极组件的直径小于第二电极组件的直径。控制器控制第一极片201a上的缓存部件250,将多余的极片缓存在切断部件240和卷绕部件230之间,随着多余的极片被缓存,第一极片201a上的编码器260的值增大,并且,第一极片201a上的编码器260的值与第二极片201b上的编码器260的值越来越接近。控制器可以在第一极片201a上的缓存部件250对第一极片201a进行一定量的缓存的情况下,控制切断部件240同时切断第一极片201a和第二极片201b。
在本申请实施例中,通过缓存部件250将与第一目标极片对应的电极组件中的多余的极片缓存在切断部件240和卷绕部件230之间,使得多个电极组件中来自同一料卷的极片的使用的长度更加接近,从而降低不稳定因素对同步卷绕电极组件产生的不利影响,降低了同步卷绕装置宕机的概率,提高了电极组件的生产速度。
应理解,缓存部件250缓存第一目标极片的长度可以根据实验值确定。例如,可以在多次同步卷绕多个电极组件的过程中,采集多个极片201a-201b的检测长度,获得多个极片201a-201b之间的检测长度的差值,根据这些差值确定第一目标极片的缓存长度。缓存部件250缓存第一目标极片的长度也可以根据实际情况确定。
可选地,在本申请的一些实施例中,缓存部件250用于缓存第一目标极片的第一长度的极片段,其中,第一长度为第一目标极片的检测长度与参考极片的检测长度的差值。
第一目标极片的检测长度与参考极片的检测长度的差值可以通过相应的编码器260上的数值确定。
举例说明,控制器根据第一极片201a上的编码器260的值和第二极片201b上的编码器260的值确定第一长度;控制器控制缓存部件250,以便将第一目标极片的第一长度的极片段缓存在切断部件240和卷绕部件230之间;控制器在第一极片201a上的编码器260的值和第二极片201b上的编码器260的值相等或者近似相等,且两个编码器260的值大于或者等于标准长度的情况下,控制切断部件240切断第一极片201a和第二极片201b切断。
应理解,在该实施例中,第一极片201a上多余的第一长度的极片段可以被卷绕至于第一电极组件的尾部。
需要说的是,若多个极片的数量大于2时,第一目标极片的数量可以大于或者1。并且,可以根据各个第一目标极片与参考极片的检测长度的差值,分别对各个 第一目标极片进行相应的缓存。
在本申请实施例中,通过第一目标极片的检测长度与参考极片的检测长度的差值确定缓存部件250对第一目标极片的缓存情况,能够准确地将多余的极片补偿至相应的电极组件的尾部,从而使得多个电极组件所用的极片的长度更加接近。
在实际应用中,由于料卷上的极片沿宽度方向的两侧的张力可能不同,通常需要对极片的张力进行控制,以便获得更好地同步卷绕多个电极组件。
如图6所示,在本申请的一些实施例中,张力调节部件270,张力调节部件270用于调节多个极片201a-201b的张力;其中,张力调节部件270位于切断部件240的上游。这样,可以使得多个极片201a-201b的传输过程均具备相应张力,有利于获得更好的卷绕效果。
张力调节部件270可以通过控制多个极片201a-201b的传输路径,调节多个极片201a-201b的张力。举例说明,参考图7,张力调节部件270可以包括动辊、连轴辊、电机和动辊硬限位。其中,张力调节部件270中的动辊对多个极片201a-201b中的冗余极片进行拉扯,以向多个极片201a-201b施加一定压力,从而使得多个极片201a-201b的走带过程具备相应张力。
可选地,同步卷绕电极组件的装置还包括具备夹持纠偏能力的夹持入料部件280,夹持入料部件280既有沿着夹棍轴向有一定的运动能力,又有主动滚动送极片的能力,其中,夹持入料部件280的一个夹持辊具备主动转动能力。应理解,张力调节部件270可以包括至少一个张力调节子部件。张力调节子部件的数量可以根据实际情况确定。
参考图6所示,在本申请的一些实施例中,张力调节部件270包括与多个极片201a-201b对应的多个张力调节子部件270a-270b,其中,每个张力调节子部件用于调节对应的极片的张力。这样,通过多个张力调节子部件270a-270b调节对应的极片的张力,可以获得更好的卷绕效果。
以张力调节部件270包括第一张力调节子部件270a和第二张力调节子部件270b为例进行说明。第一张力调节子部件270a用于调节第一极片201a的张力,第二张力调节子部件270b用于调节第二极片201b的张力。
在实际应用中,第一张力调节子部件270a和第二张力调节子部件270b的初始状态基本相同。并且,随着极片的检测长度的变化,相应的张力调节子部件的状态和对应的极片长度也相应的变化。例如,在第一极片201a的检测长度小于第二极片201b的检测长度的情况下,第一张力调节子部件270a的状态为初始状态,以及第一张力调节子部件270a对应的极片长度比第二张力调节子部件270b对应的极片长度长。为了使第一极片201a和第二极片201b的检测长度相等,缓存部件250对第一极片201a进行缓存,缓存的过程中,第一张力调节子部件270a对应的极片的长度逐渐变小,并且越来越接近初始状态。
但是,由于机械误差的存在,缓存部件250对第一极片201a的实际缓存情况与理想缓存情况存在偏差。若缓存部件250对第一极片201a的实际的缓存长度大于理想的缓存长度,则第一张力调节子部件270a的状态将与初始状态存在偏差,并接近 限位状态。
并且,随着具有第一极片201a(第一目标极片)的第一电极组件越卷越多,误差也相应地累计,第一张力调节子部件270a的状态也与初始状态的偏差越来越大,且第一张力调节子部件270a对应的极片长度越来越短,最终将出现无法对第一极片201a进行张力调节的情况,甚至有可能导致第一极片201a断开。
或者,在缓存部件250缓存过长的第一目标极片的情况下,也可能使得多个张力调节子部件270a-270b无法对相应的第一目标极片进行张力调节。
考虑到上述问题,在本申请的一些实施例中,在第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存部件250用于缓存第二目标极片的第二长度的极片段,第二目标极片为处于非限位状态的张力调节子部件对应的极片。
其中,张力调节子部件处于限位状态表示张力调节子部件对第一目标极片的张力调节能力变差。例如,可以通过位置传感器确定张力调节子部件的状态,若位置传感器的值到达阈值,则确定张力调节子部件处于限位状态,其中,阈值可以根据实际情况确定。
或者,在一些实施例中,控制器可以对第一张力调节子部件270a和第二张力调节子部件270b图像进行识别,确定第一张力调节子部件270a和第二张力调节子部件270b是否处于限位状态。若控制器根据识别结果确定第一张力调节子部件270a或者第二张力调节子部件270b处于限位状态,则控制缓存部件250缓存第二目标极片的第二长度的极片段,第二目标极片的检测长度变长。当第一极片201a的检测长度和第二极片201b的检测长度中较短的长度满足阴极极片或者阳极极片的标准长度的情况下,控制器控制切断部件240切断第一极片201a和第二极片201b。或者,当第一极片201a的检测长度和第二极片201b的检测长度中较长的长度满足阴极极片或者阳极极片的标准长度的情况下,控制器控制切断部件240切断第一极片201a和第二极片201b。
其中,第一张力调节子部件270a和第二张力调节子部件270b是相互独立的。也就是说,第一张力调节子部件270a的状态不影响第二张力调节子部件270b的状态。
进一步地,继续以两个电极组件同步卷绕为例进行说明。缓存部件250用于在第二张力调节子部件270b处于限位状态的情况下,缓存第一极片201a的第二长度的极片段;或者,在第一张力调节子部件270a处于限位状态的情况下,缓存第二极片201b的第二长度的极片段。这样,可以进一步提高对机械误差的补偿效果。
举例说明,由于缓存部件250对第二极片201b的实际缓存长度大于理想缓存长度,可能会导致C个第二电极组件中使用的第二极片201b的长度之和大于C个第一电极组件中使用的第一极片201a的长度之和。应理解,第一电极组件均在第一卷绕部上完成卷绕,第二电极组件均在第二卷绕部上完成卷绕,并且,C个第二电极组件中的第二极片201b均为第一目标极片,C>1。其中,C的值受机械精度和张力调节子部件的型号影响,具体由实际情况确定。
由此,为了补偿C个第一电极组件和C个第二电极组件之间的极片的长度差异,缓存部件250缓存第一极片201a,以增加第C+1个第一电极组件中待卷绕的第 一极片201a的长度。这样,可以使得C+1个第一电极组件中的第一极片201a的使用长度之和接近C+1个第二电极组件中的第二极片201b的使用长度之和。
应理解,上述实施例中示出了一种同步卷绕两个电极组件的情况,在这种情况下,第一目标极片和第二目标极片是不同的极片。但是,在同步卷绕两个以上电极组件,且存在多个第一目标极片的情况下,若多个第一目标极片中的部分极片对应的张力调节子部件处于限位状态,则第二目标极片为多个第一目标极片中另一部分极片和参考极片。其中,第一目标极片中另一部分极片对应的张力调节子部件处于非限位状态。
在本申请实施例中,由于张力调节子部件从正常状态变为限位状态是因缓存部件对第一目标极片的缓存长度过大引起的。也就是说,因受机械误差的影响,缓存部件对第一目标极片实际缓存的长度大于第一长度,为了使得多个极片的真实的检测长度相等,可以对第二目标极片的第二长度的极片段进行缓存。这样,可以降低机械误差对同步卷绕电极组件的装置产生的不良影响。
应理解,缓存部件250对第二目标极片的缓存长度可以根据经验值确定,也可以根据实际情况确定。
可选地,在本申请的一些实施例中,第二长度为根据张力调节子部件对应的极片长度变化范围确定的。这样,可以根据实际情况补偿相应的机械误差,能够更好地补偿机械误差。
其中,张力调节子部件对应的极片长度为张力调节子部件中的极片的长度,则张力调节子部件对应的极片长度变化范围表示:在张力调节子部件从正常状态变为限位状态的情况下,张力调节子部件中的极片长度的变化范围。
在实际应用中,可以通过位置传感器确定张力调节子部件的变化情况,根据张力调节子部件的变化情况可以确定对应的极片长度变化范围。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的三分之一至三分之二。这样,可以较为准确地补偿机械误差,获得更好的卷绕效果。
应理解,通常情况下,张力调节子部件从正常工作状态变为限位状态,张力调节子部件对应的极片长度变化量通常为三分之二的最大极片长度至三分之一的最大极片长度。其中,最大极片长度为张力调节子部件能够为相应极片提供最长的传输路径。
举例说明,第二长度为C个第二电极组件产生的误差长度,也就是说,第二长度可以为第二张力调节子部件210b从正常状态变为限位状态对应的极片长度的变化量。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的一半。这样,可以更准确地补偿机械误差,获得更好的卷绕效果。
应理解,张力调节子部件的常用工况就是张力调节子部件对应的最大极片长度变换量的一半的情况。并且,在正常的情况下,张力调节子部件基本处于常用工况。也就是说,由于机械误差的存在,张力调节子部件将从常用工况状态变成限位状 态,以及张力调节子部件对应的极片长度的变化量通常为张力调节子部件对应的最大极片长度的一半。
需要说明的是,在本申请实施例中,可以存在一个张力调节子部件处于限位状态的情况,也可以存在多个张力调节子部件处于限位状态的情况。并且,在多个张力调节子部件处于限位状态的情况下,可以根据任意一个处于限位状态的张力调节子部件对应的极片长度变化范围确定第二长度,也可以根据符合要求的处于限位状态的张力调节子部件对应的极片长度变化范围确定第二长度。
可选地,在本申请的一些实施例中,在多个第一目标极片对应的张力调节子部件处于限位状态的情况下,第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
应理解,虽然多个第一目标极片对应的张力调节子部件均处于限位状态,但是由于不同的处于限位状态的张力调节子部件对应的极片长度不同。并且,处于限位状态的张力调节子部件对应的极片长度越短,受缓存部件的机械误差的影响越大,为了更好的弥补机械误差,第二长度可以根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定。
需要说明的是,多个极片201a-201b可以是多个电极组件中不同电极组件的阴极极片,也可以是多个电极组件中不同电极组件的阳极极片。也就是说,第一目标极片可以是阴极极片和/或阳极极片,第二目标极片可以是阴极极片和/或阳极极片。
可选地,在本申请的一些实施例中,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,切断部件240还用于:基于阳极极片的切断长度,切断对应的阳极极片,阳极极片的切断长度是基于处于限位状态的张力调节子部件对应的阴极极片的缓存长度确定的。这样,可以使得阳极极片的切断长度比阴极极片的切断长度至少长b,能够提高电极组件的合格率。
应理解,合格的电极组件中阳极极片和阴极极片应满足预设条件:阳极极片的卷绕长度和阴极极片的卷绕长度的差值为b。由此,在电极组件的卷绕过程中,阴极极片的长度将影响阳极极片的长度。在第二目标极片为阴极极片的情况下,为了使与第二目标极片对应的阳极极片也至少满足上述预设条件,可以基于第二目标极片的缓存长度增加阳极极片的切断长度,切断对应的阳极极片。其中,阳极极片的增加量可以与第二目标极片的缓存长度相等,也可以大于第二目标极片的缓存长度。
可选地,在本申请的一些实施例中,阳极极片的切断长度是由阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。这样,可以在处于限位状态的张力调节子部件对应的极片为阴极极片,且多个电极组件之间的阳极极片的检测长度不同的情况下,也可以获得多个满足标准的电极组件,提高了电极组件的合格率。
举例说明,若处于限位状态的张力调节子部件对应第一电极组件中的阴极极片,为了补偿前述的机械误差,第一电极组件中的阴极极片的使用长度可能大于阴极极片标准长度,且为了满足前述的预设条件,需要根据第一电极组件中的阴极极片的缓存长度确定第一电极组件中的阳极极片的切断长度。
需要说明的是,处于限位状态的张力调节子部件对应第二电极组件中的阴极极片时,第二电极组件中的阳极极片的调节情况与上述类似,在此不再赘述。
可选地,在本申请的一些实施例中,阳极极片的切断长度等于第二目标极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
应理解,在第二目标极片为阴极极片,且第一目标极片和第二目标极片为阳极极片和/或阴极极片的情况下,第一电极组件和第二电极组件上的阳极极片的检测长度不同,为了使第一电极组件上的阳极极片和第二电极组件上的阳极极片的长度相等,并满足上述预设条件,可以将阳极极片的切断长度设置为第二目标极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。其中,N≥0。这样,可以增加阳极极片的长度,进一步增加满足满足标准的电极组件,进一步提高了电极组件的合格率。
为便于本领域技术人员理解,本申请提出了以下实施例,以描述相应的应用场景下阴极极片的检测长度和阳极极片的检测长度之间的关系。
如图8所示,以第一目标极片是阴极极片和阳极极片,且多个张力调节子部件270a-270b处于正常状态为例进行说明。
步骤810,卷绕部同步卷绕多个电极组件,控制器根据各个阴极极片的检测长度确定第一长度。
步骤820,控制器确定各个电极组件中的卷绕的阴极极片的长度。
步骤830,控制器判断各个阴极极片的检测长度的关系:
例如,判断第一电极组件的阴极极片的检测长度La、第二电极组件的阴极极片的检测长度Lb和阴极极片的标准长度L1是否相等。
步骤840,若La≠Lb≠L1,使La=L1,针对Lb进行调节。
也就是说,第一目标极片为第二电极组件的阴极极片,则缓存部件250对第二电极组件的阴极极片进行缓存。
步骤850,控制器判断各个阳极极片的检测长度的关系:
例如,判断第一电极组件的阳极极极片的检测长度Lc、第二电极组件的阳极极片的检测长度Ld和阳极极片的标准长度L2是否相等。
步骤860,若Lc≠Ld≠L2,使Lc=L2,针对Ld进行调节。
也就是说,第一目标极片为第二电极组件的阳极极片,则缓存部件250对第二电极组件的阳极极片进行缓存。
步骤870,若Lc=Ld=L2,极片收尾切断
应理解,由于L1<L2,切断部件240可以分时段分别切断阴极极片和阳极极片。
步骤880,对多个电极组件收尾。
上述实施例描述了多个张力调节子部件270a-270b均处于非限位状态的情况。在本申请的另一些实施例描述了多个张力调节子部件270a-270b中至少一个张力调节子部件处于限位状态的情况。
举例说明,如图9所示,在第二目标极片为阴极极片且第一目标极片包括 阳极极片的情况下,同步卷绕电极组件装置可以执行如下动作。
步骤900,卷绕部同步卷绕多个电极组件,并判断第一电极组件的阴极极片的检测长度La是否大于第二电极组件的阴极极片的检测长度Lb。
步骤901,若第一电极组件的阴极极片的检测长度La小于第二电极组件的阴极极片的检测长度Lb:
La=L1;Lb=L1+Z1;
其中,Z1表示第二电极组件的阴极极片上的缓存部件250缓存的极片的长度。也就是说,第二电极组件的阴极极片为第二目标极片。
步骤910,判断第一电极组件的阳极极片的检测长度Lc是否大于第二电极组件的阳极极片的检测长度Ld。
步骤911,若第一电极组件的阳极极片的检测长度Lc小于第二电极组件的阳极极片的检测长度Ld:
Lc=L2+Z1+M1×Z2;Ld=L2+Z1+M2×Z2;
其中,Z2表示第一电极组件的阳极极片上的缓存部件250缓存的极片的长度;M2=M1+1,M1=N,或者,M2=M1=N,并且,M1和M2的取值范围是0至10。也就是说,第一电极组件的阳极极片为第一目标极片。
步骤912,若第一电极组件的阳极极片的检测长度Lc大于第二电极组件的阳极极片的检测长度Ld:
Ld=L2+Z1+M1×Z3;Lc=L2+Z1+M2×Z3;
其中,Z3表示第二电极组件的阳极极片上的缓存部件250缓存的极片的长度,Z3可以等于Z2。也就是说,第二电极组件的阳极极片为第一目标极片。
步骤902,若第一电极组件的阴极极片的检测长度La大于第二电极组件的阴极极片的检测长度Lb:
Lb=L1;La=L1+Z4;
其中,Z4表示第一电极组件的阴极极片上的缓存部件250缓存的极片的长度,Z4可以等于Z1。也就是说,第一电极组件的阴极极片为第二目标极片。
步骤920,判断第一电极组件的阳极极片的检测长度Lc是否大于第二电极组件的阳极极片的检测长度Ld。
步骤921,若第一电极组件的阳极极片的检测长度Lc小于第二电极组件的阳极极片的检测长度Ld:
Lc=L2+Z1+M1×Z2;Ld=L2+Z1+M2×Z2;
也就是说,第一电极组件的阳极极片为第一目标极片。
步骤922,若第一电极组件的阳极极片的检测长度Lc大于第二电极组件的阳极极片的检测长度Ld:
Ld=L2+Z1+M1×Z3;Lc=L2+Z1+M2×Z3;
也就是说,第二电极组件的阳极极片为第二目标极片。
步骤930,根据上述第一电极组件的阴极极片和阳极极片的检测长度、第二电极组件的阴极极片和阳极极片的检测长度进行收尾调控。
步骤940,对第一电极组件和第二电极组件进行收尾。
例如,切断第一电极组件的阴极极片和第二电极组件的阴极极片;以及切断第一电极组件的阳极极片和第二电极组件的阳极极片。
在该实施例中,基于第二目标极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和确定阳极极片的切断长度,可以提升多个电极组件中符合生产标准的合格的电极组件的概率。
在本申请的另一些实施例中,如图10所示,在第二目标极片为阴极极片且第一目标极片包括阳极极片的情况下,同步卷绕电极组件装置可以执行如下动作。
步骤100,卷绕部同步卷绕多个电极组件,并判断第一电极组件的阴极极片的检测长度La是否大于第二电极组件的阴极极片的检测长度Lb。
步骤101,若第一电极组件的阴极极片的检测长度La小于第二电极组件的阴极极片的检测长度Lb:
La=L1-Z1;Lb=L1;
也就是说,第二电极组件的阴极极片为第二目标极片。
步骤110,判断第一电极组件的阳极极片的检测长度Lc是否大于第二电极组件的阳极极片的检测长度Ld。
步骤111,若第一电极组件的阳极极片的检测长度Lc小于第二电极组件的阳极极片的检测长度Ld:
Lc=L2+M1×Z2;Ld=L2+M2×Z2;
也就是说,第一电极组件的阳极极片为第一目标极片。
步骤112,若第一电极组件的阳极极片的检测长度Lc大于第二电极组件的阳极极片的检测长度Ld:
Ld=L2+M1×Z3;Lc=L2+M2×Z3;
也就是说,第二电极组件的阳极极片为第一目标极片
步骤102,若第一电极组件的阴极极片的检测长度La大于第二电极组件的阴极极片的检测长度Lb:
Lb=L1-Z4;La=L1;
也就是说,第一电极组件的阴极极片为第二目标极片。
步骤120,判断第一电极组件的阳极极片Lc是否大于第二电极组件的阳极极片的检测长度Ld。
步骤121,若第一电极组件的阳极极片的检测长度Lc小于第二电极组件的阳极极片的检测长度Ld:
Lc=L2+M1×Z2;Ld=L2+M2×Z2;
也就是说,第一电极组件的阳极极片为第一目标极片。
步骤122,若第一电极组件的阳极极片的检测长度Lc大于第二电极组件的阳极极片的检测长度Ld:
Ld=L2+M1×Z3;Lc=L2+M2×Z3;
也就是说,第二电极组件的阳极极片为第二目标极片。
步骤130,根据上述第一电极组件的阴极极片和阳极极片的检测长度、第二电极组件的阴极极片和阳极极片的检测长度进行收尾调控。
步骤140,对第一电极组件和第二电极组件进行收尾。
例如,切断部件240切断第一电极组件的阴极极片和第二电极组件的阴极极片;以及切断第一电极组件的阳极极片和第二电极组件的阳极极片。
在该实施例中,可以在一定程度上节省极片,降低了电极组件的生产成本。
需要说明的是,若第二目标极片为阴极极片和阳极极片,缓存部件250分别对相应的阴极极片和阳极极片缓存第二长度的极片段。并且,在阳极极片的检测长度比阴极极片的检测长度至少长b的情况下,切断部件240切断阴极极片和阳极极片。
参考图4至图10,在本申请的一些实施例中,缓存部件250包括与多个极片201a-201b对应的多个缓存子部件250a-250b;其中,每个缓存子部件用于缓存对应的极片。这样,可以更好地对多个极片201a-201b进行缓存,从而使得多个电极组件中来自同一料卷的极片的使用的长度更加接近。
其中,多个缓存子部件250a-250b可以是相同的缓存机构,也可以是不相同的缓存机构。
参考图11所示,在本申请的一些实施例中,每个缓存子部件包括多个定辊251a和多个动辊252b,多个定辊251a和多个动辊252b分别位于极片的两侧,多个动辊252b中的至少一个动辊252b朝向多个定辊251a的一侧D1移动,以缓存对应的极片的极片段,多个定辊251a的数量大于或者等于多个动辊252b的数量。这样,可以简单、灵活、准确地缓存对应的极片的极片段。
以缓存部件250包括第一缓存子部件250a和第二缓存子部件250b为例进行说明。第一缓存子部件250a包括X1个定辊251a和N1个动辊252b;N1个动辊252b中的至少一个动辊252b用于朝着X1个定辊251a的一侧D1移动,以缓存第一极片201a的第一长度的极片段,X1>N1,X1和N1为正整数。
其中,X1和N1的关系也可以为N1+1≤X1≤2N1。
应理解,N1个动辊252b中至少一个动辊朝着X1个定辊251a的一侧D1移动表示:N1个动辊252b中至少一个动辊可以超过X1个定辊251a,也可以不超过X1个定辊251a,具体需要根据实际情况确定。并且,动辊252b朝着X1个定辊251a的一侧D1移动的距离越大,缓存的第一极片201a的长度越长。其中,N1个动辊252b可以是连接一体同时驱动,也可以是分开驱动,优选双动辊以下数量的动辊结构。
在本申请的一些实施例中,N1个动辊252b中的至少一个动辊还用于在第二张力调节子部件270b处于限位状态的情况下,朝着X1个定辊251a的方向移动,以缓存所述第一极片201a的第二长度的极片段。这样,可以简单、灵活、准确地缓存第一极片201a的第二长度的极片段。
在本申请的一些实施例中,第二缓存子部件250b包括X2个定辊251b和N2个动辊252b;N2个动辊252b中的至少一个动辊252b用于朝着X2个定辊251b的方向移动,以缓存第二极片201b的第一长度的极片段,X2>N2,X2和N2为正整数。这样,可以简单、灵活、准确地缓存第二极片201b的第一长度的极片段。
其中,X2和N2的关系也可以为N2+1≤X2≤2N2。
应理解,N2个动辊252b中至少一个动辊252b朝着X2个定辊251b的一侧D1移动表示:N2个动辊252b中至少一个动辊252b可以超过X2个定辊251b,也可以不超过X2个定辊251b,具体需要根据实际情况确定。并且,动辊252b朝着X2个定辊251b的方向移动的距离越大,缓存的第二极片201b的长度越长。其中,N2个动辊252b可以是连接一体同时驱动,也可以是分开驱动,优选双动辊252b以下数量的动辊252b结构。
在本申请的一些实施例中,N2个动辊252b中的至少一个动辊252b还用于在第一张力调节子部件270a处于限位状态的情况下,朝着X2个定辊251b的方向移动,以缓存第二极片201b的第二长度的极片段。这样,可以简单、灵活、准确地缓存第二极片201b的第二长度的极片段。
应理解,N2个动辊252b和X2个定辊251b相互配合的过程与上述实施例相互配的过程相同,在此不再赘述。
在本申请的一些实施例中,每个缓存子部件包括压花辊,所述压花辊用于在对应的极片上设置凸点,以缓存所述极片的极片段。这样,可以便捷地缓存极片的极片段。
其中,每个缓存子部件可以包括胶辊和压花辊,压花辊可以在对应的极片上设置凸点,以增加对应的极片的凸点区域的厚度。其中,凸点区域的厚度与第一长度呈正相关,以及凸点区域的厚度也与第二长度呈正相关。
参考图12,以缓存部件250包括第一缓存子部件250a和第二缓存子部件250b为例进行说明。其中,第一缓存子部件250a包括第一胶辊254a和第一压花辊253a(也称为压花辊253a),第一压花辊253a用于在第一极片201a上设置凸点,以缓存第一极片201a的第一长度的极片段。第一压花辊253a还用于在第二张力调节子部件270b处于限位状态的情况下,在第一极片201a上设置凸点,以缓存第一极片201a的第二长度的极片段。这样,可以便捷地缓存第一极片201a的第二长度的极片段。
应理解,由于第一长度和第二长度可能不同,则根据第一张力调节子部件270a的状态,第一压花辊253a在第一极片201a设置的凸点的高度也不同,从而第一极片201a的凸点区域的厚度也不同。
在本申请的一些实施例中,第二缓存子部件250b包括第二压花辊253b(也称为压花辊253b),第二压花辊253b用于在第二极片201b上设置凸点,以缓存第二极片201b的第一长度的极片段。这样,可以便捷地缓存第二极片201b的第一长度的极片段。
其中,第二缓存部件250可以包括第二胶辊254b和第二压花辊253b,第二压花辊253b可以在第二极片201b上设置凸点,以增加第二极片201b的凸点区域的厚度。其中,凸点区域的厚度与第二极片201b的第一长度的极片段呈正相关。
在本申请的一些实施例中,第二压花辊253b还用于在第二张力调节子部件270b处于限位状态的情况下,在第二极片201b上设置凸点,以缓存第二极片201b的第二长度的极片段。这样,可以便捷地缓存第二极片201b的第二长度的极片段。
应理解,由于第一长度和第二长度可能不同,则根据第二张力调节子部件270b的状态,第二压花辊253b在第二极片201b设置的凸点的高度也不同,从而第二极片201b的凸点区域的厚度也不同。
参考图13,在本申请的一些实施例中,每个张力调节子部件包括两个定辊、以及分别位于两个定辊连线M两侧的动辊,其中,每个张力子部件在处于限位状态的情况下,沿垂直于连线M的方向D2,定辊与动辊之间的距离位于预设范围P1内。
应理解,其中,预设范围P1根据实际情况确定。并且,通过设置预设范围,可以控制定辊和动辊的距离,降低对张力调节子部件造成损坏的机率。
举例说明,张力调节部件270包括第一张力调节子部件270a和第二张力调节子部件270b。其中,第一张力调节子部件270a包括2个定辊和2个动辊;第二张力调节子部件270b包括2个定辊和2个动辊;第一张力调节子部件270a处于限位状态的情况为2个定辊与2个动辊的距离在预设范围P1内;第二张力调节子部件270b处于限位状态的情况为2个定辊中的多个定辊与2个动辊的距离在预设范围P1内。这样,通过动辊和定辊的相互配合,便于给多个正在卷绕的电极组件中的极片提供张力;并且,根据动辊和定辊的相对位置,便于确定第一张力调节子部件270a和第二张力调节子部件270b相应的状态。
需要说明的是,第一张力调节子部件270a和第二张力调节子部件270b中的极片的长度为定辊和动辊之间的极片的长度。
参考图13和图14,在本申请的一些实施例中,在第一动辊272a(也称为动辊272a)与第一定辊271a(也称为定辊271a)处于最大距离P2的情况下,第一动辊272a与第一定辊271a之间的极片长度为第一张力调节子部件对应的最大极片长度,第一动辊272a与第一定辊271a之间的极片长度与预设范围P1内的极片长度的差值为第一张力调节子部件270a对应的最大极片长度变化量;以及在第二动辊272b(也称为动辊272b)与第二动辊272b相邻的第二定辊271b(也称为定辊271b)处于最大距离P2的情况下,第二动辊272b与第二定辊271b之间的极片长度为第二张力调节子部件270b对应的最大极片长度,第二动辊272b与第二定辊271b之间的极片长度和预设范围P1内的极片长度的差值为第二张力调节子部件270b对应的最大极片长度变化量。这样,可以更好地根据实际情况补偿相应的机械误差。
应理解,为了降低对第一张力调节子部件270a和第二张力子调节部件270b造成损伤的机率,通常在多个张力调节子部件270a-270b中的动辊和定辊的距离在预设范围内时,就对同步卷绕电极组件的装置根据上述实施例的描述进行相应的调节。
在实际应用中,第一动辊272a受缓存部件250的影响,将朝着第一定辊271a的方向D2移动。第二动辊272b受缓存部件250的影响,将朝着第二定辊271b的方向D2移动。
需要说明的是,第一目标极片可以为多个极片210a-210b中除参考极片以外的任一极片,也可以是多个极片210a-210b中除参考极片以外的极片中符合要求的极片。
可选地,在本申请的一些实施例中,第一目标极片的检测长度与参考极片的检测长度的差值大于预设值。这样,可以在一定程度上降低缓存部件250对第一目 标极片缓存的次数,从而可以在多个极片的检测长度基本相等的前提下,提高同步卷绕电极组件的效率。
其中,预设值可以根据检测多个极片210a-210b的检测长度部件(例如,编码器260)的精度确定。
例如,在本申请的一些实施例中,预设值位于1mm至2mm之间。这样,可以在多个极片的检测长度基本相等与同步卷绕电极组件的效率之间得到平衡。
也就是说,1mm≤预设值≤2mm。
可选地,在本申请的一些实施例中,缓存部件还用于在第一目标极片的检测长度满足预设长度的情况下,对第一目标极片进行缓存,其中,预设长度是根据多个极片的标准长度确定的。
例如,预设长度可以根据多个极片的标准长度和缓存部件250的最大缓存能力确定。并且,预设长度和多个极片的标准长度的差值可以是10mm-15m之间的任意值,例如,10mm、20mm、1m、5m、10m、11m、12m、14m、15m等。
需要说明的是,缓存部件250的最大缓存能力可以根据动辊252b和定辊251a之间的活动距离确定。
在本申请实施例中,由于隔离膜的厚度会出现波动,则第一目标极片的检测长度也会出现不同规律的变化,因此,可以在第一目标极片满足预设长度的情况下,也就是说,在第一目标极片的检测长度接近多个极片的标准长度的情况下,对第一目标极片进行缓存,能够在一定程度上降低缓存部件对第一目标极片缓存的次数,提高同步卷绕电极组件的效率。
可选地,在本申请的一些实施例中,缓存部件250可以在同步卷绕的电极组件中极片的圈数在预设圈数内时,对第一目标极片进行缓存。其中,预设圈数根据合格的电极组件的圈数确定。
需要说明的是,电极组件的圈数与多个极片的标准长度有关。
上文描述了本申请实施例的同步卷绕电极组件的装置。下面将描述本申请实施例的同步卷绕电极组件的方法,其中未详细描述的部分可参见前述各实施例。
图15示出了本申请实施例提供的一种同步卷绕电极组件的方法的流程图。
如图15所示,同步卷绕电极组件的方法400包括以下内容。
步骤410,确定同步卷绕的多个极片201a-201b中的第一目标极片,第一目标极片为所述多个极片中除参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片。
步骤420,缓存第一目标极片。
步骤430,在第一目标极片被缓存的情况下,切断多个极片201a-201b。
应理解,多个极片201a-201b的检测长度表示多个电极组件中待卷绕的极片的长度。
举例说明,在同步卷绕两个电极组件的过程中,若第一电极组件的直径小于第二电极组件的直径,则第一目标极片为第一极片201a;若第二电极组件的直径小 于第一电极组件的直径,则第一目标极片为第二极片201b。由此,在第一目标极片被缓存的情况下,例如,在第一极片201a被缓存的情况下,切断第一极片201a和第二极片201b,可以获得两个极片长度接近的电极组件,并且,第一电极组件的第一极片201a的圈数大于第二电极组件的第二极片201b的圈数。
本申请实施例提出一种同步卷绕电极组件的方法400,该方法400通过缓存多个极片201a-201b中除具有最长的检测长度的极片以外的第一目标极片,且在第一目标极片被缓存的情况下,切断多个极片201a-201b。也就是说,可以在多个正在卷绕的电极组件的直径不相等的情况下,增加除具有最大直径的电极组件以外的电极组件中极片的检测长度,从而使得多个电极组件中来自同一料卷的极片的使用长度更加接近,从而降低不稳定因素对同步卷绕电极组件产生的不利影响,减小同步卷绕装置宕机的概率,提高了电极组件的生产速度。
可选地,在本申请的一些实施例中,缓存第一目标极片,包括:缓存第一目标极片的第一长度的极片段,其中,第一目标极片的检测长度与参考极片的检测长度的差值。
可选地,在本申请的一些实施例中,同步卷绕电极组件的方法400还包括:在第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存多个极片210a-210b中的第二目标极片的第二长度的极片段,其中,张力调节子部件用于调节对应的极片的张力;第二目标极片为处于非限位状态的张力调节子部件对应的极片;在第二目标极片被缓存的情况下,切断多个极片。
可选地,在本申请的一些实施例中,第二长度是根据张力调节子部件对应的极片长度变化范围确定的。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的三分之一至三分之二。
可选地,在本申请的一些实施例中,第二长度为张力调节子部件对应的最大极片长度变化量的一半。
可选地,在本申请的一些实施例中,在多个第一目标极片对应的张力调节子部件处于限位状态的情况下,第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
可选地,在本申请的一些实施例中,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,方法还包括:根据限位状态的张力调节子部件对应的阴极极片的缓存长度,确定对应的阳极极片的切断长度。
可选地,在本申请的一些实施例中,阳极极片的切断长度是由阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。
可选地,在本申请的一些实施例中,阳极极片的切断长度等于阴极极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
可选地,在本申请的一些实施例中,第一目标极片的检测长度与参考极片的检测长度的差值大于预设值。
可选地,在本申请的一些实施例中,预设值位于1mm至2mm之间。
可选地,在本申请的一些实施例中,缓存第一目标极片,包括:在第一目标极片的检测长度满足预设长度的情况下,缓存第一目标极片,其中,预设长度是根据多个极片的标准长度确定的。
图16示出了本申请实施例提供的另一种同步卷绕电极组件的装置的方框示意图。如图16所示,同步卷绕电极组件的装置600包括:确定模块610,确定模块610用于确定同步卷绕的多个极片中的第一目标极片,第一目标极片为多个极片中除参考极片以外的极片,参考极片为多个极片中具有最长的检测长度的极片;缓存模块620,缓存模块620用于缓存第一目标极片;切断模块630,切断模块630用于在第一目标极片被缓存的情况下,切断多个极片。
可选地,在本申请的一些实施例中,缓存模块620还用于缓存第一目标极片的第一长度的极片段,其中,第一目标极片的检测长度与参考极片的检测长度的差值。
可选地,在本申请的一些实施例中,缓存模块620还用于在第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存多个极片210a-210b中的第二目标极片的第二长度的极片段,其中,张力调节子部件用于调节对应的极片的张力;第二目标极片为处于非限位状态的张力调节子部件对应的极片;在第二目标极片被缓存的情况下,切断多个极片。
可选地,在本申请的一些实施例中,在本申请的一些实施例中,确定模块610还用于根据张力调节子部件对应的极片长度变化范围确定第二长度。
可选地,在本申请的一些实施例中,确定模块610还用于根据张力调节子部件对应的最大极片长度变化量的三分之一至三分之二确定第二长度。
可选地,在本申请的一些实施例中,确定模块610还用于根据张力调节子部件对应的最大极片长度变化量的一半确定第二长度。
可选地,在本申请的一些实施例中,在多个第一目标极片对应的张力调节子部件处于限位状态的情况下,第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
可选地,在本申请的一些实施例中,确定模块610还用于在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,根据限位状态的张力调节子部件对应的阴极极片的缓存长度,确定对应的阳极极片的切断长度。
可选地,在本申请的一些实施例中,确定模块610还用于根据由阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定阳极极片的切断长度。
可选地,在本申请的一些实施例中,阳极极片的切断长度等于阴极极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
可选地,在本申请的一些实施例中,第一目标极片的检测长度与参考极片的检测长度的差值大于预设值。
可选地,在本申请的一些实施例中,预设值位于1mm至2mm之间。
可选地,在本申请的一些实施例中,缓存模块620还用于在第一目标极片的检测长度满足预设长度的情况下,对第一目标极片进行缓存,其中,预设长度是根据多个极片的标准长度确定的。
本申请实施例还提供了一种计算机可读存储介质,包括计算机程序,计算机程序在计算机上运行时,使得计算机执行上述同步卷绕电极组件的方法中的步骤的指令。
上述的计算机可读存储介质可以是暂态计算机可读存储介质,也可以是非暂态计算机可读存储介质。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的方法、装置和计算机可读存储介质的具体工作过程,可以参考前述装置实施例中的对应过程,在此不再赘述。
在本申请的描述中,需要说明的是,除非另有说明,“多个”的含义是两个以上;术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述,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的限制。此外,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直,而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向,并不是对本申请的具体结构进行限定。在本申请的描述中,还需要说明的是,除非另有明确的规定和限定,术语“安装”、“连接”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。对于本领域的普通技术人员而言,可视具体情况理解上述术语在本申请中的具体含义。
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 (33)

  1. 一种同步卷绕电极组件的装置,其特征在于,所述装置包括卷绕部件、切断部件和缓存部件:
    其中,所述缓存部件位于所述切断部件和所述卷绕部件之间;
    所述卷绕部件用于同步卷绕多个极片;
    所述缓存部件用于对所述多个极片中的第一目标极片进行缓存,其中,所述第一目标极片为所述多个极片中除参考极片以外的极片,所述参考极片为所述多个极片中具有最长的检测长度的极片;
    所述切断部件用于在所述第一目标极片被缓存的情况下,切断所述多个极片。
  2. 根据权利要求1所述的装置,其特征在于,所述缓存部件用于缓存所述第一目标极片的第一长度的极片段,其中,所述第一长度为所述第一目标极片的检测长度与所述参考极片的检测长度的差值。
  3. 根据权利要求1或2所述的装置,其特征在于,所述装置还包括:
    张力调节部件,所述张力调节部件用于调节所述多个极片的张力;
    其中,所述张力调节部件位于所述切断部件的上游。
  4. 根据权利要求3所述的装置,其特征在于,所述张力调节部件包括与所述多个极片对应的多个张力调节子部件,其中,每个张力调节子部件用于调节对应的极片的张力。
  5. 根据权利要求4所述的装置,其特征在于,在所述第一目标极片对应的张力调节子部件处于限位状态的情况下,所述缓存部件用于缓存第二目标极片的第二长度的极片段,所述第二目标极片为处于非限位状态的张力调节子部件对应的极片。
  6. 根据权利要求5所述的装置,其特征在于,所述第二长度是根据所述张力调节子部件对应的极片长度变化范围确定的。
  7. 根据权利要求6所述的装置,其特征在于,所述第二长度为所述张力调节子部件对应的最大极片长度变化量的三分之一至三分至二。
  8. 根据权利要求6或7所述的装置,其特征在于,所述第二长度为所述张力调节子部件对应的最大极片长度变化量的一半。
  9. 根据权利要求5所述的装置,其特征在于,在多个所述第一目标极片对应的张力调节子部件处于限位状态的情况下,所述第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
  10. 根据权利要求5至9中任一项所述的装置,其特征在于,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,所述切断部件还用于:
    基于阳极极片的切断长度,切断对应的阳极极片,所述阳极极片的切断长度是基于处于所述限位状态的张力调节子部件对应的阴极极片的缓存长度确定的。
  11. 根据权利要求10所述的装置,其特征在于,所述阳极极片的切断长度是由所述阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。
  12. 根据权利要求10或11所述的装置,其特征在于,所述阳极极片的切断长度等于所述阴极极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
  13. 根据权利要求1至12中任一项所述的装置,其特征在于,所述缓存部件包括与所述多个极片对应的多个缓存子部件;
    其中,每个缓存子部件用于缓存对应的极片。
  14. 根据权利要求13所述的装置,其特征在于,所述每个缓存子部件包括多个定辊和多个动辊,所述多个定辊和所述多个动辊分别位于极片的两侧,所述多个动辊中的至少一个动辊朝向所述多个定辊的一侧移动,以缓存对应的极片的极片段,所述多个定辊的数量大于或者等于所述多个动辊的数量。
  15. 根据权利要求13所述的装置,其特征在于,所述每个缓存子部件包括压花辊,所述压花辊用于在对应的极片上设置凸点,以缓存所述极片的极片段。
  16. 根据权利要求4至15中任一项所述的装置,其特征在于,所述每个张力调节子部件包括两个定辊、以及分别位于所述两个定辊连线两侧的动辊;
    其中,所述每个张力子部件在处于限位状态的情况下,沿垂直于所述连线的方向,所述定辊与所述动辊之间的距离位于预设范围内。
  17. 根据权利要求1至16中任一项所述的装置,其特征在于,所述第一目标极片的检测长度与所述参考极片的检测长度的差值大于预设值。
  18. 根据权利要求17所述的装置,其特征在于,所述预设值位于1mm至2mm之间。
  19. 根据权利要求1至18中任一项所述的装置,其特征在于,所述缓存部件还用于在所述第一目标极片的检测长度满足预设长度的情况下,对所述第一目标极片进行缓存,其中,所述预设长度是根据所述多个极片的标准长度确定的。
  20. 一种同步卷绕电极组件的方法,其特征在于,所述方法包括:
    确定同步卷绕的多个极片中的第一目标极片,所述第一目标极片为所述多个极片中除参考极片以外的极片,所述参考极片为所述多个极片中具有最长的检测长度的极片;
    缓存所述第一目标极片;
    在所述第一目标极片被缓存的情况下,切断所述多个极片。
  21. 根据权利要求20所述的方法,其特征在于,所述缓存所述第一目标极片,包括:
    缓存所述第一目标极片的第一长度的极片段,其中,所述第一长度为所述第一目标极片的检测长度与所述参考极片的检测长度的差值。
  22. 根据权利要求20或21所述的方法,其特征在于,所述方法还包括:
    在所述第一目标极片对应的张力调节子部件处于限位状态的情况下,缓存所述多个极片中的第二目标极片的第二长度的极片段,其中,所述张力调节子部件用于调节对应的极片的张力;所述第二目标极片为处于非限位状态的张力调节子部件对应的极片;
    在所述第二目标极片被缓存的情况下,切断所述多个极片。
  23. 根据权利要求22所述的方法,其特征在于,所述第二长度是根据所述张力调节子部件对应的极片长度变化范围确定的。
  24. 根据权利要求23所述的方法,其特征在于,所述第二长度为所述张力调节子部件对应的最大极片长度变化量的三分之一至三分之二。
  25. 根据权利要求23或24所述的方法,其特征在于,所述第二长度为所述张力调节子部件对应的最大极片长度变化量的一半。
  26. 根据权利要求22所述的方法,其特征在于,在多个所述第一目标极片对应的张力调节子部件处于限位状态的情况下,所述第二长度是根据多个处于限位状态的张力调节子部件对应的极片长度的最小值确定的。
  27. 根据权利要求22至26中任一项所述的方法,其特征在于,在处于限位状态的张力调节子部件对应的极片为阴极极片的情况下,所述方法还包括:
    根据所述限位状态的张力调节子部件对应的阴极极片的缓存长度,确定对应的阳极极片的切断长度。
  28. 根据权利要求27所述的方法,其特征在于,所述阳极极片的切断长度是由所述阴极极片的缓存长度、阳极极片的标准长度和不同的阳极极片之间的检测长度的差值确定的。
  29. 根据权利要求28所述的方法,其特征在于,所述阳极极片的切断长度等于所述阴极极片的缓存长度、阳极极片的标准长度和N倍的不同的阳极极片之间的检测长度的差值之和。
  30. 根据权利要求20至29中任一项所述的方法,其特征在于,所述第一目标极片的检测长度与所述参考极片的检测长度的差值大于预设值。31.根据权利要求30所述的方法,其特征在于,所述预设值位于1mm至2mm之间。
  31. 根据权利要求20至31中任一项所述的方法,其特征在于,所述缓存所述第一目标极片,包括:
    在所述第一目标极片的检测长度满足预设长度的情况下,缓存所述第一目标极片,其中,所述预设长度是根据所述多个极片的标准长度确定的。
  32. 一种同步卷绕电极组件的装置,其特征在于,所述装置包括:
    确定模块,所述确定模块用于确定同步卷绕的多个极片中的第一目标极片,所述第一目标极片为所述多个极片中除参考极片以外的极片,所述参考极片为所述多个极片中具有最长的检测长度的极片;
    缓存模块,所述缓存模块用于缓存所述第一目标极片;
    切断模块,所述切断模块用于在所述第一目标极片被缓存的情况下,切断所述多个极片。
  33. 一种计算机可读存储介质,其特征在于,包括计算机程序,当所述计算机程序在计算机上运行时,使得所述计算机执行权利要求20至32中任一项所述的同步卷绕电极组件的方法。
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CN114865104A (zh) * 2022-04-29 2022-08-05 广东利元亨智能装备股份有限公司 极片自动接带方法、装置、控制器以及存储介质
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