WO2022252774A1 - 电芯制作设备及其方法、电池和用电装置 - Google Patents

电芯制作设备及其方法、电池和用电装置 Download PDF

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Publication number
WO2022252774A1
WO2022252774A1 PCT/CN2022/082761 CN2022082761W WO2022252774A1 WO 2022252774 A1 WO2022252774 A1 WO 2022252774A1 CN 2022082761 W CN2022082761 W CN 2022082761W WO 2022252774 A1 WO2022252774 A1 WO 2022252774A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
pole piece
unit
film
cell
Prior art date
Application number
PCT/CN2022/082761
Other languages
English (en)
French (fr)
Inventor
滕国鹏
Original Assignee
江苏时代新能源科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to EP22758415.8A priority Critical patent/EP4120423A4/en
Priority to JP2022553009A priority patent/JP2023533406A/ja
Priority to KR1020227030234A priority patent/KR20220163942A/ko
Publication of WO2022252774A1 publication Critical patent/WO2022252774A1/zh
Priority to US18/167,539 priority patent/US20230187681A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of batteries, in particular to a battery manufacturing equipment and method thereof, a battery and an electrical device.
  • the present application provides a cell production equipment and its method, a battery and an electrical device.
  • the diaphragm can be attached to the predetermined position of the pole sheet or the diaphragm while transporting the electrode sheet and the diaphragm, so as to enhance the The mechanical properties of the pole piece or diaphragm can reduce the process and improve the winding efficiency of the battery core.
  • the first aspect of the present application provides a battery cell production equipment, which is used to produce battery cells.
  • the battery core includes pole pieces and diaphragms. a core; and a film sticking mechanism, used for pasting the film on a predetermined position of the pole piece or the diaphragm before winding the pole piece and the diaphragm, so that a reinforcing film layer is formed on the pole piece or the diaphragm.
  • the film operation is carried out on the pole piece or diaphragm to improve the winding efficiency of the battery core.
  • the cell manufacturing equipment further includes a feeding unit, which is arranged between the film-attaching mechanism and the winding mechanism, and the feeding unit is used to transport a predetermined length of pole pieces or diaphragms, so that the film-attaching mechanism can The transmission of the length of the pole piece or diaphragm to determine the predetermined position.
  • the pole piece or diaphragm of a predetermined length is transmitted by the feeding unit, so that the predetermined position of the pasted film is determined according to the predetermined length, and the position of the film pasted on the pole piece or diaphragm can be precisely controlled.
  • the feeding unit includes a plurality of feeding rollers, and the plurality of feeding rollers are arranged at intervals, so that a predetermined length of pole pieces or separators can be transported between the plurality of feeding rollers.
  • a predetermined length of diaphragm can be transported through a plurality of feed rollers arranged at intervals to ensure a more accurate position of the film on the diaphragm.
  • the position of at least one feeding roller among the plurality of feeding rollers is adjustable, so as to adjust the length of the pole piece or diaphragm conveyed by the feeding unit.
  • the position of one or more feeding rollers can be adjusted, and the length of the pole piece or diaphragm on the feeding unit can be adjusted as required, so as to ensure that the length of the conveyed diaphragm is a predetermined length.
  • the cell production equipment also includes a detection unit and a control unit, the detection unit is used to detect the material parameters of the pole piece or diaphragm, and transmit the material parameters to the control unit, and the control unit adjusts the feeding roller according to the material parameters position to adjust the length of the pole piece or diaphragm conveyed by the feeding unit.
  • the material parameters are detected by the detection unit, so that the length of the transported diaphragm can be adjusted according to the material parameters to ensure that the length of the diaphragm on the feeding unit is a predetermined length, thereby accurately determining the predetermined position of the film on the diaphragm.
  • the detection unit includes a sensor, the sensor is connected to the feeding unit, detects the positions of multiple feeding rollers, and transmits the detection result to the control unit; the control unit adjusts the transmission speed of the feeding unit according to the detection result.
  • the sensor detects the position of the feeding roller, and can determine whether the length of the diaphragm on the feeding unit matches the preset predetermined length.
  • the film sticking mechanism includes: a film unwinding unit, used to transport the film; a cutting unit, used to cut the film when the film unwinding unit transports a predetermined length of film; The unit is used to attach the diaphragm cut by the cutting unit to the predetermined position of the pole piece or diaphragm.
  • the film sticking mechanism can perform film sticking operation on the pole piece or diaphragm during the transmission process of the pole piece or diaphragm, so that a reinforced film layer is formed on the pole piece or diaphragm.
  • the laminating unit includes: a film suction mechanism for absorbing the cut membrane; a pressing mechanism for pressing the absorbed membrane to a predetermined position of the pole piece or the diaphragm.
  • the diaphragm is adsorbed and then pressed to the pole piece or diaphragm, which makes the film sticking operation easier and improves production efficiency.
  • the pressing mechanism is provided with a heating device.
  • the heating device heats the diaphragm to make the diaphragm melt and become viscous, so that it is easier for the diaphragms to be thermally compounded and bonded together.
  • the pressing mechanism is a pressing roller or a pressing plate.
  • the pressure roller or platen has simple structure, good film sticking effect and high production efficiency.
  • the cell production equipment also includes a pole piece unwinding unit, a diaphragm unwinding unit, a pole piece transmission unit and a diaphragm transmission unit, the pole piece unwinding unit outputs the pole piece to the pole piece transmission unit, and the diaphragm unwinds
  • the unit outputs the diaphragm to the diaphragm transfer unit, and the pole piece transfer unit and the diaphragm transfer unit transfer the pole piece and diaphragm to the winding mechanism.
  • the pole piece unwinding unit and the diaphragm unwinding unit are used to continuously provide pole pieces and diaphragms, so that the winding mechanism can continue to wind the battery cells and improve production efficiency.
  • the pole piece transmission unit and the diaphragm transmission unit can provide tension for the transmission of the pole piece and the diaphragm, and clamp the end of the cut pole piece and diaphragm and the beginning section of the next pole piece and diaphragm.
  • the predetermined position is the position where the pole piece or the separator is bent during winding.
  • Attaching the diaphragm at the position where the pole piece or diaphragm is bent during winding can enhance the mechanical properties of the bent position.
  • the second aspect of the present application provides a method for manufacturing an electric core.
  • the electric core includes a pole piece and a diaphragm.
  • the method includes the following steps: attaching the diaphragm to a predetermined position of the pole piece or the diaphragm, forming a reinforcing film on the pole piece or the diaphragm layer; the pole piece and diaphragm are wound to form a battery core.
  • the cell manufacturing method also includes the following steps: delivering a predetermined length of pole pieces and diaphragms; after completing the transmission of a predetermined length of pole pieces and diaphragms, attaching the diaphragms to the pole pieces or diaphragms predetermined location.
  • the cell manufacturing method further includes the following step: adjusting the conveying distance of the pole piece or the diaphragm, so as to transport the predetermined length of the pole piece or the diaphragm.
  • adjusting the conveying distance of the pole piece or the diaphragm to transport the predetermined length of the pole piece or the diaphragm includes: detecting the material parameter of the pole piece or the diaphragm, and adjusting the conveying distance of the pole piece or the diaphragm according to the material parameter.
  • the third aspect of the present application provides a battery, the cell of which is made by the above-mentioned cell manufacturing method, and a diaphragm is attached to a predetermined position of at least one of the pole piece and the separator of the cell.
  • a fourth aspect of the present application provides an electrical device, including the above-mentioned battery, and the battery is used to provide electrical energy.
  • the cell manufacturing equipment and method thereof of the present application can attach the diaphragm to the predetermined position of the electrode sheet or the diaphragm while conveying the electrode sheet and the diaphragm during the cell manufacturing process, thereby reducing the process and improving the winding efficiency of the cell .
  • the battery cell in the battery is made by the above-mentioned cell manufacturing equipment and method, and a reinforcing film layer is pasted on at least one predetermined position of the cell pole piece and the separator, which strengthens the pole piece and the separator.
  • the mechanical properties of the separator improve the service life of the battery.
  • Fig. 1 is a schematic diagram of the structure of a vehicle according to Embodiment 1 of the present application;
  • FIG. 2 is a schematic diagram of a winding mechanism winding a first pole piece, a second pole piece and a diaphragm according to an embodiment of the present application;
  • FIG. 3 is a schematic diagram of a cell manufacturing device according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a cell manufacturing device according to another embodiment of the present application.
  • Fig. 5 is a schematic diagram of a film sticking mechanism of a specific embodiment of the present application.
  • FIG. 6 is a schematic diagram of a cell manufacturing device according to another embodiment of the present application.
  • FIG. 7 is a schematic diagram of a feeding unit according to an embodiment of the present application.
  • Fig. 8 is a functional block diagram of adjusting the transmission length of the diaphragm by the feeding unit of a specific embodiment of the present application;
  • Fig. 9 is a functional block diagram of a sensor detecting a feed roller in a specific embodiment of the present application.
  • Fig. 10 is the functional block diagram that the control unit of a specific embodiment of the application controls the feeding unit to adjust the diaphragm transmission length;
  • FIG. 11 is a flow chart of a method for manufacturing a battery cell according to an embodiment of the present application.
  • Feeding unit; 81 feeding roller; 81a, the first feeding roller; 81b, the second feeding roller; 81c, the third feeding roller; 81d, the fourth feeding roller; 81e, the fifth feeding roller; 81f, the sixth feeding roller; 81g, the seventh Feed roller; 81h, eighth feed roller; 81i, ninth feed roller; 81j, tenth feed roller; 9, control unit; 91, computer; 92, touch screen; 93, controller; 10, detection unit; 101, sensor .
  • the embodiment of the present application provides a battery D and a device using the battery D as a power source.
  • Devices that use the battery D as a power source include vehicles A, ships, small aircraft, etc.
  • the device uses the battery D to provide electrical energy to generate driving force for driving the device.
  • the device can also use electricity and other types of energy (such as fossil energy) at the same time to jointly generate driving force. As long as the device that can use the battery D as a power source is within the protection scope of the present application.
  • Fig. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
  • vehicle A in the embodiment of the present application may be a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, or a hybrid vehicle or an extended-range vehicle.
  • a vehicle A includes a motor M, a controller C and a battery D.
  • the battery D is horizontally arranged at the bottom of the vehicle body, and the controller C controls the battery D to supply power to the motor M, and the motor M is connected to the wheels on the vehicle body through a transmission mechanism, thereby driving the vehicle A to travel.
  • the cell of battery D is wound by pole piece and diaphragm.
  • the winding mechanism of the battery manufacturing equipment winds the pole pieces and separators into batteries.
  • FIG. 2 is a schematic diagram of the winding mechanism 2 winding the first pole piece 11 , the second pole piece 12 and the diaphragm 13 according to an embodiment of the present application.
  • the winding mechanism 2 winds the first pole piece 11, the second pole piece 12 and the diaphragm 13, the polarity of the first pole piece 11 and the second pole piece 12 are opposite, one of them is positive sheet, and the other is the negative sheet.
  • the diaphragm 13 is an insulator interposed between the first pole piece 11 and the second pole piece 12 . After the first pole piece 11 , the second pole piece 12 and the diaphragm 13 are wound on the winding mechanism 2 , the battery core 1 is formed.
  • FIG. 3 is a schematic diagram of a cell manufacturing device 100 according to an embodiment of the present application.
  • the battery manufacturing equipment 100 of the present application includes a winding mechanism 2 and a film sticking mechanism 3 .
  • the film sticking mechanism 3 sticks the diaphragm 14 on the predetermined position of the first pole piece 11 , the second pole piece 12 or the diaphragm 13 , so that a reinforcing film layer is formed on the first pole piece 11 , the second pole piece 12 or the diaphragm 13 .
  • the winding mechanism 2 is used to wind the first pole piece 11 , the second pole piece 12 and the separator 13 to form the battery core 1 .
  • the diaphragm 14 can be attached to any one or more of the first pole piece 11, the second pole piece 12, and the diaphragm 13 to form a reinforcement on the first pole piece 11, the second pole piece 12, or the diaphragm 13. film layer, thereby enhancing the mechanical properties of the pole piece or diaphragm.
  • the specific positions of attaching the diaphragm 14 on the first pole piece 11 , the second pole piece 12 and the diaphragm 13 can be determined according to the structure of the wound cell and the stress of each pole piece and the diaphragm 13 .
  • the bent position is called the corner position, and the diaphragm 14 is attached to the corner position of the pole piece or the diaphragm 13, The mechanical properties of the corner position can be enhanced.
  • the pole piece or the diaphragm 13 is prone to breakage, and the diaphragm 14 is attached to the inner ring position of the pole piece and the diaphragm 13 after winding to prevent breakage happened.
  • the diaphragm 14 can be attached to the inner side or outer side of the first pole piece 11 , the second pole piece 12 and the diaphragm 13 , or attached to the inner side and the outer side at the same time.
  • the inner surface refers to the inner peripheral surface of the pole piece or diaphragm 13 facing the central axis of the battery core after being wound, and the outer surface is the outer peripheral surface of the pole piece or diaphragm 13 opposite to the inner surface.
  • the inner side is squeezed and the outer side is stretched. Attaching the diaphragm 14 to the inner side of the pole piece and the diaphragm 13 can prevent the powder from falling off the pole piece.
  • the outer surface of the pole piece and the diaphragm 13 can prevent the pole piece from breaking.
  • the membrane 14 is attached to the diaphragm 13 as an example for detailed description.
  • the film attaching mechanism 3 attaches the diaphragm 14 to a predetermined position of the diaphragm 13 to form a reinforced film layer on the diaphragm 13 .
  • the separator 13 bonded with the reinforced film layer is sent to the winding mechanism 2, and the winding mechanism 2 winds the separator 13 bonded with the reinforced film layer together with the first pole piece 11 and the second pole piece 12 to form a battery cell 1.
  • Fig. 3 Only one film sticking mechanism 3 is shown in Fig. 3 to stick a film on the diaphragm 13.
  • the film sticking mechanism 3 can also stick a film on the first pole piece 11 or the second pole piece 12, or make a cell
  • the device 100 may also include a plurality of film sticking mechanisms 3 for sticking film on one or more of the first pole piece 11 , the second pole piece 12 and the diaphragm 13 respectively.
  • the film sticking mechanism 3 sticks the film to the diaphragm 13 once, and the The diaphragm 14 is pasted on the diaphragm 13 , and a plurality of reinforcing film layers spaced at a certain distance are formed on the diaphragm 13 .
  • the distance between adjacent reinforced film layers on the diaphragm 13 can be set according to the structure and stress of the cell 1.
  • a section of diaphragm 14 can be pasted at a predetermined position of the diaphragm 13, so that a section of reinforced film is formed in one cell 1.
  • a section of diaphragm 14 can also be pasted at multiple predetermined positions of the diaphragm 13 , so that multiple sections of reinforced film layers are formed in one cell 1 .
  • the film sticking mechanism 3 A diaphragm 14 is pasted on the first pole piece 11 , the second pole piece 12 or the diaphragm 13 to form a reinforced film layer to enhance the mechanical properties of the pole piece or the diaphragm 13 .
  • FIG. 4 is a schematic diagram of a cell manufacturing device 100 according to another embodiment of the present application.
  • the cell manufacturing equipment 100 further includes a pole piece unwinding unit 4 , a diaphragm unwinding unit 5 , a pole piece transport unit 6 and a diaphragm transport unit 7 .
  • the winding mechanism 2 and the film sticking mechanism 3 of the cell manufacturing equipment 100 are the same as those in the above-mentioned embodiments.
  • the pole piece unwinding unit 4 is used to provide the pole piece to the winding mechanism 2.
  • the cell manufacturing equipment 100 includes two pole piece unwinding units 4, which respectively provide the first pole piece 11 and the second pole piece 12.
  • the diaphragm unwinding unit 5 is used to provide the diaphragm 13 to the winding mechanism 2 .
  • the cell manufacturing equipment 100 includes two diaphragm unwinding units 5 .
  • the number of the pole piece unwinding unit 4 and the diaphragm unwinding unit 5 is not limited to two, and the number can be set according to the specific structure of the battery cell 1 .
  • a pole piece transmission unit 6 is set, and the pole piece unwinding unit 4 outputs the pole piece to the pole piece transmission unit 6.
  • the two pole piece unwinding units 4 output the first pole piece respectively.
  • the pole piece 11 and the second pole piece 12 are transferred to the corresponding pole piece transfer unit 6 .
  • a diaphragm transmission unit 7 is set, and the diaphragm unwinding unit 5 outputs the diaphragm 13 to the diaphragm transmission unit 7.
  • two diaphragm unwinding units 5 output the diaphragm 13 to the corresponding diaphragm respectively.
  • the winding mechanism 2 winds the first pole piece 11 , the second pole piece 12 and the separator 13 for a predetermined number of turns to form the battery core 1 .
  • FIG. 5 is a schematic diagram of a film sticking mechanism 3 according to a specific embodiment of the present application.
  • the film sticking mechanism 3 includes a film unwinding unit 31 , a cutting unit 32 and a sticking unit 33 .
  • the film unwinding unit 31 is used to transport the film 14; the cutting unit 32 is arranged between the film unwinding unit 31 and the bonding unit 33, and the cutting unit 32 is used to transport a predetermined length of film in the film unwinding unit 31 At 14 o'clock, the diaphragm 14 is cut off, and the predetermined length and width of the diaphragm 14 can be set and adjusted according to the specific structure of the battery cell 1; Book a spot.
  • the film sticking mechanism 3 is arranged after the diaphragm unwinding unit 5, and the diaphragm unwinding unit 5 transmits the diaphragm 13 to the bonding unit 33 of the film bonding mechanism 3, and the bonding unit 33
  • the diaphragm 14 is attached to the diaphragm 13 to form a reinforced film layer and improve the mechanical properties of the diaphragm 13 .
  • the bonding unit 33 includes a film suction mechanism 331 and a pressing mechanism 332 .
  • the suction mechanism 331 is used to absorb the cut film 14 ; the pressing mechanism 332 presses the absorbed film 14 to a predetermined position of the diaphragm 13 .
  • the laminating unit 33 performs lamination operation of the diaphragm 14 , so that the diaphragm 14 is pasted on the predetermined position of the diaphragm 13 .
  • a film pasting operation can be performed at the initial position of the diaphragm 13 transmission, and after continuing to transfer the diaphragm 13 of a length of the electric core 1, The next film sticking operation is performed, so that a reinforced film layer is formed on the inner ring of the diaphragm 13 wound by each cell 1 to enhance the mechanical properties of the diaphragm 13 .
  • the pressing mechanism 332 is provided with a heating device.
  • the heating device heats the diaphragm 14 to make the heated area of the diaphragm 14 melt and become viscous, so that the diaphragm 14 and the diaphragm 13 are thermally combined.
  • the pressing mechanism 332 may use pressing rollers. After the film unwinding unit 31 provides the film 14 of the predetermined length, the cutting unit 32 cuts the film 14, and transmits the film 14 of the predetermined length to the suction film mechanism 331 of the bonding unit 33, and the film suction mechanism 331 The film 14 cut off with a predetermined length is absorbed and transported to the pressure roller, and at the same time, the diaphragm unwinding unit 5 conveys the diaphragm 13 to the pressure roller, and the pressure roller presses the film 14 adsorbed on the film suction mechanism 331 to the diaphragm 13 At this time, a reinforced film layer is formed on the diaphragm 13 that has been rolled by the pressure roller.
  • a heating device may be installed in the pressure roller.
  • the pressure roller heats the membrane 13 and the membrane 14 absorbed by the film suction mechanism 331 and rolls them together to form a reinforced film layer on the membrane 13 .
  • the pressing mechanism 332 may use a pressing plate.
  • the cutting unit 32 cuts the film 14, and transmits the film 14 of the predetermined length to the suction film mechanism 331 of the bonding unit 33, and the film suction mechanism 331 will The cut-off diaphragm 14 of predetermined length is adsorbed and transported to the pressing plate, and at the same time, the diaphragm unwinding unit 5 transfers the diaphragm 13 to the pressing plate, and the pressing plate presses the diaphragm 14 adsorbed on the film suction mechanism 331 onto the diaphragm 13. , forming a reinforcing film layer on the diaphragm 13 pressed by the pressing plate.
  • a heating device may be provided in the pressing plate.
  • the pressing plate heats the diaphragm 13 and the membrane 14 absorbed by the film suction mechanism 331 and presses them together, thereby forming a reinforced film layer on the diaphragm 13 .
  • FIG. 6 is a schematic diagram of a cell manufacturing device 100 according to another embodiment of the present application.
  • the transmission speed of the diaphragm transmission unit 7 will have a certain difference, and the transmission speed of the pole piece and the diaphragm 13 is not constant. If the position of the film is controlled according to the transmission speed of the pole piece or the diaphragm 13, the position of the film will deviate, so that the film cannot be accurately pasted, affecting Enhance the effect of the film layer.
  • the cell manufacturing equipment 100 in order to enable the film sticking mechanism 3 to accurately attach the diaphragm 14 to the predetermined position of the diaphragm 13, also includes a feeding unit 8, the feeding unit 8 uses In order to transmit the predetermined length of the pole piece or diaphragm 13, the film sticking mechanism 3 determines the film sticking position according to each predetermined length of the pole piece or diaphragm 13, so that the film 14 can be accurately pasted to the predetermined position of the diaphragm 13, ensuring that the reinforced film layer The accuracy of the location.
  • the winding mechanism 2 the film sticking mechanism 3, the pole piece unwinding unit 4, the diaphragm unwinding unit 5, the pole piece transmission unit 6 and the diaphragm transmission unit 7 of the cell manufacturing equipment 100 are the same as the above embodiments.
  • the feeding unit 8 of this embodiment is arranged between the film sticking mechanism 3 and the winding mechanism 2, specifically, it can be set between the film sticking mechanism 3 and the diaphragm transmission mechanism 7, so as to transport the predetermined length of the diaphragm 13 .
  • a plurality of film sticking mechanisms 3 can be set, and a feeding unit 8 is set after each film sticking mechanism 3 to transmit the predetermined length of the first pole piece.
  • the film sticking of the diaphragm 13 is taken as an example for detailed description.
  • the diaphragm unwinding unit 5 outputs the diaphragm 13 to the film sticking mechanism 3 , and the film sticking mechanism 3 sticks the film on the diaphragm 13 , attaches the diaphragm 14 to the diaphragm 13 to form a reinforced film layer, and transmits it to the feeding unit 8 .
  • the feeding unit 8 can hold a predetermined length of diaphragm 13 , and transfer the predetermined length of diaphragm 13 to the diaphragm transfer unit 7 , and the diaphragm transfer unit 7 transfers the diaphragm 13 to the winding mechanism 2 .
  • the film sticking mechanism 3 sticks the film 14 at a predetermined position of the diaphragm 13 to form a reinforced film layer, and transmits the film to the feeding unit 8 .
  • the feeding unit 8 holds a membrane 13 of a predetermined length, and transmits the membrane 13 of a predetermined length to the membrane transmission unit 7 , and the membrane transmission unit 7 transmits the membrane 13 to the winding mechanism 2 .
  • the diaphragm 13 has a first film attachment position 131, and when the first film attachment position 131 is transferred to the winding mechanism 2, the winding mechanism 2 takes the first pole piece 11, the second pole piece 12 and the diaphragm of a predetermined length 13 for winding, at this time, the film sticking mechanism 3 sticks the next piece of film 14 on the second film sticking position 132 of the diaphragm 13, and as the winding mechanism 2 winds the diaphragm 13, the first film sticking position 131 of the diaphragm 13 Wound into the battery cell 1 , the second film sticking position 132 is passed into the feeding unit 8 and then transferred to the winding mechanism 2 .
  • the length of the diaphragm 13 between the first film pasting position 131 and the second film pasting position 132 is set to the length of the diaphragm 13 required for winding one electric core 1. In this case, at the beginning of an electric When the core 1 is wound, that is, the film sticking operation of the diaphragm 13 of the next cell 1 is started, and the formation of a reinforcing film layer on the fixed position of the diaphragm 13 of the cell 1 can be accurately controlled.
  • Attaching the diaphragm 14 at the first film attachment position 131 and the second film attachment position 132 is just an example, and the diaphragm 14 can be attached at any position of the diaphragm 13 according to the mechanical performance requirements of the specific internal structure of the battery cell 1.
  • the specific film attachment The position can be set by adjusting the predetermined length of the diaphragm 13 on the feeding unit 8 .
  • FIG. 7 is a schematic diagram of a feeding unit 8 according to an embodiment of the present application.
  • the feeding unit 8 includes a plurality of feeding rollers 81 arranged at intervals, so that the plurality of feeding rollers 81 transport a predetermined length of the membrane 13 .
  • the feeding unit 8 includes a first feeding roller 81a, a second feeding roller 81b, a third feeding roller 81c, a fourth feeding roller 81d, a fifth feeding roller 81e, a sixth feeding roller 81f, a seventh feeding roller roller 81g, eighth feed roller 81h, ninth feed roller 81i, and tenth feed roller 81j.
  • the quantity and arrangement of the feeding rollers 81 can be set according to the actual conditions of the equipment and the site, and are not limited to the quantity and arrangement shown in FIG. 7 .
  • the film sticking mechanism 3 attaches the diaphragm 14 to the diaphragm 13, and then transfers the diaphragm 13 to the feeding unit 8.
  • the diaphragm 13 is first transferred to the first feeding roller 81a, and according to the arrangement of the plurality of feeding rollers 81 Into the second feed roller 81b, the third feed roller 81c, the fourth feed roller 81d, the fifth feed roller 81e, the sixth feed roller 81f, the seventh feed roller 81g, the eighth feed roller 81h, the ninth feed roller 81i and the tenth feeding roller 81j, and then the tenth feeding roller 81j is conveyed to the subsequent mechanism, for example, the membrane transport unit 7 or the winding mechanism 2.
  • the diaphragm 13 of a predetermined length is conveyed between the first feed roller 81a and the tenth feed roller 81j, therefore, the length of the diaphragm 13 conveyed between the film sticking mechanism 3 and the winding mechanism 2 is fixed, for example, the fixed length is to wind a cell 1
  • a plurality of feed rollers 81 are distributed on both sides of the centerline X, for example, feed rollers 81a, 81c, 81e, 81g, 81i are located on one side of the centerline X, and feed rollers 81b, 81d, 81f, 81h, 81j On the other side of the midline X.
  • the diaphragm 13 is conveyed to the second feeding roller 81b by the first feeding roller 81a, and the second feeding roller 81b transfers the diaphragm 13 to the third feeding roller 81c, until the diaphragm 13 is conveyed to the tenth feeding roller 81j, and the diaphragm 13 is in a plurality of
  • the feeding rollers 81 are transported in a serpentine shape, so the feeding unit 8 can transport a relatively long diaphragm 13 and save space.
  • the arrangement of the plurality of feeding rollers 81 is not limited to the above-mentioned serpentine arrangement, and can be specifically arranged according to needs.
  • Using a plurality of feeding rollers 81 can flexibly adjust the position of the film sticking.
  • the position of one or more feeding rollers 81 located on one side of the center line X can be set to be adjustable, so that the length of the diaphragm 13 between one feeding roller 81 and the next feeding roller 81 can be adjusted.
  • the positions of the feed rollers 81 on both sides can also be set to be adjustable, so that the length of the diaphragm 13 between the plurality of feed rollers 81 can be adjusted more flexibly, thereby accurately determining the predetermined position of the film on the diaphragm 13 .
  • FIG. 8 is a functional block diagram of adjusting the transmission length of the diaphragm 13 by the feeding unit 8 according to a specific embodiment of the present application.
  • the cell manufacturing equipment 100 further includes a detection unit 10 and a control unit 9, and the detection unit 10 is used to detect the first pole piece 11, the second pole piece 12 and/or the diaphragm 13 material parameters, and transmit the material parameters to the control unit 9, the control unit 9 adjusts the position of the feeding roller 81 according to the material parameters, so as to adjust the first pole piece 11, the second pole piece 12 and/or the diaphragm 13 transported by the feeding unit 8 length.
  • the material parameters include the thickness of the first pole piece 11 , the second pole piece 12 or the diaphragm 13 , the position of the tab of the first pole piece 11 or the second pole piece 12 and other parameters.
  • the inspection unit 10 detects the thickness of the first pole piece 11, the second pole piece 12 and/or the diaphragm 13, And calculate the length of the diaphragm 13, the control unit 9 adjusts the position of the feeding roller 81 of the feeding unit 8, so that the length of the diaphragm on the feeding unit 8 is a predetermined length, thereby ensuring the accuracy of the position of the film on the diaphragm 13.
  • tabs are die-cut on the first pole piece 11 and the second pole piece 12 , and the tabs on each pole piece need to be aligned when the winding mechanism 2 winds the battery core 1 . During the winding operation, the tabs may be misaligned. In order to reduce the misalignment of the tabs, when the first pole piece 11 and the second pole piece 12 are transported, it is necessary to align the first pole piece 11 and the second pole piece 12 according to the position of the tabs. The transmission length of the pole piece 12 is adjusted. Due to the change of the length of the pole piece, the length of the diaphragm 13 also needs to be adjusted.
  • the detection unit 10 detects the position of the tab, and adjusts the transmission length of the first pole piece 11 and the second pole piece 12, and the control unit 9 then adjusts the transmission length according to the transmission length of the first pole piece 11 and the second pole piece 12.
  • the position of the feeding roller 81 of the feeding unit 8 is adjusted so that the length of the diaphragm on the feeding unit 8 is a predetermined length, thereby ensuring the accuracy of the film sticking position on the diaphragm 13 .
  • FIG. 9 is a functional block diagram of the sensor 101 detecting the feeding roller 81 according to a specific embodiment of the present application.
  • the detection unit 10 includes a sensor 101, the sensor 101 is connected with the feeding unit 8, detects the positions of a plurality of feeding rollers 81, and transmits the detection result to the control unit 9;
  • the unit 9 adjusts the length of the diaphragm 13 conveyed by the feeding unit 8 according to the detection result.
  • the sensor 101 detects the positions of a plurality of feeding rollers 81, and the control unit 9 calculates the length of the diaphragm 13 on the feeding unit 8 according to the detection results.
  • the length of the diaphragm 13 is greater than or less than the predetermined length, it is determined that the diaphragm 13 If the length is too long or insufficient, the position of the feeding roller 81 is adjusted to ensure that the length of the diaphragm 13 on the feeding unit 8 is equal to the preset length.
  • FIG. 10 is a functional block diagram of the control unit 9 controlling the feeding unit 8 to adjust the transmission length of the diaphragm 13 according to a specific embodiment of the present application.
  • control unit 9 includes a computer 91 , a touch screen 92 and a controller 93 .
  • the detection unit 10 detects the material parameters of the diaphragm 13, and transmits the material parameters to the computer 91 of the control unit 9, and the computer 91 calculates the predetermined length of the diaphragm 13 on the feeding unit 8 according to the material parameters, and transmits it to the computer.
  • 91 shows real-time results.
  • the computer 91 transmits the calculation result to the controller 93, and the controller 93 adjusts the position of the feeding roller 81 according to the calculation result, so that the length of the diaphragm 13 on the feeding unit is a predetermined length.
  • the detection unit 10 detects the positions of a plurality of feed rollers 81, and transmits the position information of the feed rollers 81 to the computer 91 of the control unit 9, and the computer 91 calculates the current feeding according to the position information of the feed rollers 81.
  • the length of the diaphragm 13 on the unit 8 is displayed on the computer 91 in real time.
  • the computer 91 transmits the calculation result to the controller 93, and the controller 93 adjusts the position of the feeding roller 81 according to the calculation result, so that the length of the diaphragm 13 on the feeding unit 8 is a predetermined length.
  • the operator can also input a control command through the touch screen 92 to preset the predetermined length of the diaphragm 13 on the feeding unit 8, and control the controller 93 to adjust the position of the feeding roller 81 so that the feeding unit 8 can send out a predetermined length of the diaphragm 13 .
  • FIG. 11 is a flowchart of a method for manufacturing a cell according to an embodiment of the present application.
  • the present application also provides a method for manufacturing an electric core 1, the electric core 1 includes a first pole piece 11, a second pole piece 12 and a diaphragm 13, and the method includes the following steps:
  • step S1 attach the diaphragm 14 to a predetermined position of the first pole piece 11 , the second pole piece 12 or the diaphragm 13 , and form a reinforcing film layer on the first pole piece 11 , the second pole piece 12 or the diaphragm 13 .
  • the diaphragm 14 may be attached to any one or more of the first pole piece 11 , the second pole piece 12 , and the diaphragm 13 .
  • Step S2 winding the first pole piece 11 , the second pole piece 12 and the diaphragm 13 to form the battery core 1 .
  • the cell manufacturing method further includes the following steps: delivering the first pole piece 11, the second pole piece 12 and the separator 13 of a predetermined length; During the transmission of the sheet 12 and the diaphragm 13, the diaphragm 14 is pasted on the predetermined position of the first pole piece 11, the second pole piece 12 or the diaphragm 13, and on the first pole piece 11, the second pole piece 12 or the diaphragm 13 A plurality of reinforcement film layers spaced apart by a certain distance are formed.
  • the distance between adjacent reinforced film layers can be set according to the structure and force of the battery cell 1.
  • a section of diaphragm 14 can be pasted at a predetermined position of the diaphragm 13, so that a section of reinforced film layer is formed in one battery cell 1.
  • a segment of diaphragm 14 may be pasted at a plurality of predetermined positions of the diaphragm 13 so that multiple segments of reinforcing film layers are formed in one cell 1 .
  • the cell manufacturing method further includes the following steps: adjusting the conveying distance of the first pole piece 11, the second pole piece 12 or the diaphragm 13, so as to transport the predetermined length of the first pole piece 11, the second pole piece 12 or diaphragm 13.
  • the diaphragm 14 When the diaphragm 14 is pasted on the diaphragm 13, the length of the diaphragm 13 from the position of the diaphragm 13 to the winding position is fixed, and the diaphragm 13 of a predetermined length is transported once, and the diaphragm 14 is pasted at the next predetermined position of the diaphragm 13 , so as to ensure that each film sticking position on the diaphragm 13 is a predetermined position, ensuring the accuracy of the film sticking position.
  • the conveying distance of the first pole piece 11, the second pole piece 12 or the diaphragm 13 is adjusted to transmit a predetermined length of the first pole piece 11, the second pole piece 12 or the diaphragm 13 , including: detecting the material parameters of the first pole piece 11, the second pole piece 12 or the diaphragm 13, and adjusting the conveying distance of the first pole piece 11, the second pole piece 12 or the diaphragm 13 according to the material parameters, so as to transmit a predetermined length of The first pole piece 11 , the second pole piece 12 or the diaphragm 13 .
  • the material parameters include the thickness of the first pole piece 11 , the second pole piece 12 or the diaphragm 13 , the position of the tab of the first pole piece 11 or the second pole piece 12 and other parameters.
  • the winding required The length of the first pole piece 11, the second pole piece 12 and the diaphragm 13 deviates, therefore, the thickness of the first pole piece 11, the second pole piece 12 and/or the diaphragm 13 is detected, and the length of the diaphragm 13 is calculated , and then adjust the length of the transported diaphragm 13 so that the length of the diaphragm is a predetermined length, thereby ensuring the accuracy of the position of the film on the diaphragm 13 .
  • tabs are die-cut on the first pole piece 11 and the second pole piece 12 , and it is necessary to align the tabs on each pole piece when winding the battery core 1 .
  • the tabs may be misaligned.
  • the transmission length of the dipole sheet 12 is adjusted. Due to the change of the length of the pole piece, the length of the diaphragm 13 also needs to be adjusted.
  • the cell manufacturing equipment 100 and the method thereof of the present application can attach the diaphragm 14 to the first pole while transporting the first pole piece 11, the second pole piece 12 and the diaphragm 13 during the process of making the battery cell 1.
  • the predetermined position of the piece 11, the second pole piece 12 or the diaphragm 13 reduces the number of steps and improves the winding efficiency of the battery cell 1 .
  • the transmission length of the first pole piece 11, the second pole piece 12 or the separator 13 is adjusted, thereby adjusting the predetermined position of the film to ensure the accuracy of the position of the enhanced film layer.
  • the cells in the battery are manufactured by the above-mentioned cell manufacturing equipment 100, and a reinforcing film layer is pasted on at least one predetermined position of the cell pole piece and the diaphragm, which enhances the mechanical properties of the pole piece and the diaphragm , improve battery life.
  • the electrical device provided by this application uses battery D to provide electric energy.
  • the battery cell of battery D is manufactured by the above-mentioned cell manufacturing equipment 100.
  • Battery D has a long service life, which prolongs the service life of battery D and saves costs. .

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Abstract

本申请提供一种电芯制作设备及其方法、电池和用电装置，该电芯制作设备用于制作电芯，电芯包括极片和隔膜，电芯制作设备包括：卷绕机构，用于对极片和隔膜进行卷绕，形成电芯；和贴膜机构，用于在卷绕所述极片和所述隔膜前，将膜片贴合在极片和/或隔膜的预定位置，以使极片和/或隔膜上形成增强膜层。本申请在制作电芯过程中，能够在输送极片和隔膜的同时，将膜片贴合至极片或者隔膜的预定位置，减少工序，提高电芯卷绕效率。

Description

电芯制作设备及其方法、电池和用电装置
相关申请的交叉引用
本申请要求享有于2021年06月01日提交的名称为“电芯制作设备及其方法、电池和用电装置”的中国专利申请202110610984.5的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，特别是涉及一种电芯制作设备及其方法、电池和用电装置。
背景技术
在电池生产过程中，需要使用卷绕设备将极片和隔膜卷绕成电芯。现有技术中，在卷绕设备卷绕好电芯后，再在电芯上贴合膜片，不能针对电芯的内部结构增强极片或隔膜的力学性能，并且，工序较多，电芯卷绕效率低。
发明内容
本申请提供一种电芯制作设备及其方法、电池和用电装置，在制作电芯过程中，能够在输送极片和隔膜的同时，将膜片贴合至极片或者隔膜的预定位置，增强极片或者隔膜的力学性能，减少工序，提高电芯卷绕效率。
本申请第一方面提供一种电芯制作设备，用于制作电芯，电芯包括极片和隔膜，电芯制作设备包括：卷绕机构，用于对极片和隔膜进行卷绕，形成电芯；和贴膜机构，用于在卷绕所述极片和所述隔膜前，将膜片贴合在极片或隔膜的预定位置，以使极片或隔膜上形成增强膜层。
在极片或隔膜的预定位置贴合膜片，形成增强膜层，提高极片或隔膜的力学性能。在极片或隔膜的传输过程中，对极片或隔膜进行贴膜操作，提高电芯卷绕效率。
在一种可能的设计中，电芯制作设备还包括送料单元，送料单元设置在贴膜机构和卷绕机构之间，送料单元用于传输预定长度的极片或隔膜，以使贴膜机构能够根据预定长度的极片或隔膜的传输来确定预定位置。
通过送料单元传输预定长度的极片或隔膜，从而根据预定长度确定贴合膜片的预定位置，能够精确控制在极片或隔膜上的贴膜位置。
在一种可能的设计中，送料单元包括多个送料辊，多个送料辊间隔设置，以使多个送料辊之间能够传输预定长度的极片或隔膜。
通过多个间隔设置的送料辊，能够传输预定长度的隔膜，确保在隔膜上贴膜位 置更精确。
在一种可能的设计中，多个送料辊中的至少一个送料辊的位置可调，以调整送料单元传输的极片或隔膜的长度。
使一个或多个送料辊的位置可调，能够根据需要调整送料单元上极片或隔膜的长度，以保证输送的隔膜长度为预定长度。
在一种可能的设计中，电芯制作设备还包括检测单元和控制单元，检测单元用于检测极片或隔膜的物料参数，并将物料参数传输至控制单元，控制单元根据物料参数调整送料辊的位置，以调整送料单元传输的极片或隔膜的长度。
通过检测单元对物料参数进行检测，从而可以根据物料参数对传输的隔膜长度进行调整，确保送料单元上的隔膜长度为预定长度，从而精确地确定隔膜上贴膜的预定位置。
在一种可能的设计中，检测单元包括传感器，传感器与送料单元连接，对多个送料辊的位置进行检测，并将检测结果传送给控制单元；控制单元，根据检测结果，调整送料单元传输的极片或隔膜的长度。
传感器检测送料辊的位置，能够判定送料单元上的隔膜长度与设定的预定长度是否匹配。
在一种可能的设计中，贴膜机构包括：膜片放卷单元，用于输送膜片；切断单元，用于在膜片放卷单元输送预定长度的膜片时，切断膜片；和贴合单元，将被切断单元切割的膜片贴合在极片或隔膜的预定位置。
贴膜机构能够在极片或隔膜的传输过程中，对极片或隔膜进行贴膜操作，以使极片或隔膜上形成增强膜层。
在一种可能的设计中，贴合单元包括：吸膜机构，用于吸附被切割的膜片；压合机构，将被吸附的膜片压合在极片或隔膜的预定位置。
将膜片吸附后再压合至极片或隔膜，使贴膜操作更简便，提高生产效率。
在一种可能的设计中，压合机构设置有加热装置。
加热装置对膜片进行加热，使膜片发生熔融而具有粘性，从而更易于隔膜热复合结合在一起。
在一种可能的设计中，压合机构为压辊或压板。
压辊或压板结构简单，贴膜效果好，生产效率高。
在一种可能的设计中，电芯制作设备还包括极片放卷单元、隔膜放卷单元、极片传输单元和隔膜传输单元，极片放卷单元输出极片至极片传输单元，隔膜放卷单元输出隔膜至隔膜传输单元，极片传输单元和隔膜传输单元将极片和隔膜传送至卷绕机构。
采用极片放卷单元和隔膜放卷单元可持续提供极片和隔膜，使卷绕机构可持续进行电芯的卷绕，提高生产效率。极片传输单元和隔膜传输单元能够为极片和隔膜的传输提供张紧力，并夹住被切断的极片和隔膜的末端和下一段极片和隔膜的起始段。
在一种可能的设计中，预定位置为极片或隔膜在卷绕时发生弯折的位置。
在极片或隔膜在卷绕时发生弯折的位置贴合膜片，可以增强弯折位置的力学性 能。
本申请第二方面提供一种电芯制作方法，电芯包括极片和隔膜，该方法包括以下步骤：将膜片贴合在极片或隔膜的预定位置，使极片或隔膜上形成增强膜层；对极片和隔膜进行卷绕，形成电芯。
在一种可能的设计中，电芯制作方法还包括以下步骤：输送预定长度的极片和隔膜；每完成一次预定长度的极片和隔膜的传输后，将膜片贴合在极片或隔膜的预定位置。
在一种可能的设计中，电芯制作方法还包括以下步骤：调整极片或隔膜的输送距离，以传输预定长度的极片或隔膜。
在一种可能的设计中，调整极片或隔膜的输送距离，以传输预定长度的极片或隔膜包括：检测极片或隔膜的物料参数，并根据物料参数调整极片或隔膜的输送距离。
本申请第三方面提供一种电池，其电芯由上述的电芯制作方法制成，电芯的极片和隔膜的至少一个的预定位置贴合有膜片。
本申请第四方面提供一种用电装置，包括上述的电池，电池用于提供电能。
本申请的电芯制作设备及其方法，在制作电芯过程中，能够在输送极片和隔膜的同时，将膜片贴合至极片或者隔膜的预定位置，减少工序，提高电芯卷绕效率。并且，在卷绕电芯时，调整极片或隔膜的输送距离，从而调整贴膜的预定位置，保证增强膜层位置的精确度。
本申请的电池和用电装置，该电池中的电芯由上述电芯制作设备和方法制成，在电芯极片和隔膜的至少一个预定位置贴合有增强膜层，增强了极片和隔膜的力学性能，提高电池的使用寿命。
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使用的附图作简单介绍，显而易见，以下描述的附图仅仅是本申请的具体实施例，本领域技术人员在不付出创造性劳动的前提下，可以根据以下附图获得其他实施例。
图1为本申请实施例一的车辆结构示意图；
图2为本申请一实施例的卷绕机构卷绕第一极片、第二极片和隔膜的示意图；
图3为本申请一实施例的电芯制作设备的示意图；
图4为本申请另一实施例的电芯制作设备的示意图；
图5为本申请一个具体实施例的贴膜机构的示意图；
图6为本申请另一实施例的电芯制作设备的示意图；
图7为本申请一实施例的送料单元的示意图；
图8为本申请一个具体实施例的送料单元调整隔膜传输长度的功能框图；
图9为本申请一个具体实施例的传感器检测送料辊的功能框图；
图10为本申请一个具体实施例的控制单元控制送料单元调整隔膜传输长度的 功能框图；
图11为本申请一实施例的电芯制作方法流程图；
在附图中，附图并未按照实际的比例绘制。
附图标记：A、车辆；C、控制器；M、马达；D、电池；X、中线；100、电芯制作设备；1、电芯；11、第一极片；12、第二极片；13、隔膜；131、第一贴膜位置；132、第二贴膜位置；14、膜片；2、卷绕机构；3、贴膜机构；31、膜片放卷单元；32、切断单元；33、贴合单元；331、吸膜机构；332、压合机构；4、极片放卷单元；5、隔膜放卷单元；6、极片传输单元；7、隔膜传输单元；8、送料单元；81、送料辊；81a、第一送料辊；81b、第二送料辊；81c、第三送料辊；81d、第四送料辊；81e、第五送料辊；81f、第六送料辊；81g、第七送料辊；81h、第八送料辊；81i、第九送料辊；81j、第十送料辊；9、控制单元；91、计算机；92、触摸屏；93、控制器；10、检测单元；101、传感器。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了更好的理解本申请的技术方案，下面结合附图对本申请实施例进行详细描述。
应当明确，以下实施例仅仅是本申请一部分实施例。基于以下实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
在本申请实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
需要注意的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。
本申请实施例提供一种电池D，以及使用该电池D作为电源的装置。
使用电池D作为电源的装置包括车辆A、船舶、小型飞机等设备，该装置采用电池D提供电能，产生驱动该装置的驱动力。该装置也可以同时使用电能和其他类型的能源(例如化石能源)，共同产生驱动力。只要能够使用电池D作为电源的装置均 在本申请的保护范围内。
图1为本申请一实施例的车辆结构示意图。
如图1所示，以车辆A为例，本申请实施例中的车辆A可为新能源汽车，该新能源汽车可为纯电动汽车，也可为混合动力汽车或增程式汽车等。比如，车辆A包括马达M、控制器C和电池D。电池D水平设置于车辆主体的底部，控制器C控制电池D为马达M供电，马达M通过传动机构与车辆主体上的车轮连接，从而驱动车辆A行进。
电池D的电芯由极片和隔膜卷绕而成。制作电芯时，电芯制作设备的卷绕机构将极片和隔膜卷绕为电芯。
图2为本申请一实施例的卷绕机构2卷绕第一极片11、第二极片12和隔膜13的示意图。
如图2所示，卷绕机构2对第一极片11、第二极片12和隔膜13进行卷绕，第一极片11和第二极片12的极性相反，其中一者为正极片，另一者为负极片。隔膜13是介于第一极片11和第二极片12之间的绝缘体。第一极片11、第二极片12和隔膜13在卷绕机构2上完成卷绕后形成电芯1。
图3为本申请一实施例的电芯制作设备100的示意图。
如图3所示，本申请的电芯制作设备100，包括卷绕机构2和贴膜机构3。贴膜机构3将膜片14贴合在第一极片11、第二极片12或隔膜13的预定位置，以使第一极片11、第二极片12或隔膜13上形成增强膜层。卷绕机构2用于对第一极片11、第二极片12和隔膜13进行卷绕，形成电芯1。
膜片14可以贴合在第一极片11、第二极片12、隔膜13中的任意一者或多者上，以在第一极片11、第二极片12或隔膜13上形成增强膜层，从而增强极片或隔膜的力学性能。
在第一极片11、第二极片12和隔膜13上贴合膜片14的具***置，可以根据卷绕后的电芯结构、及各极片和隔膜13的受力情况而确定。例如，由于第一极片11、第二极片12和隔膜13在卷绕时发生弯折，该弯折位置称为转角位置，将膜片14贴合于极片或隔膜13的转角位置，可以增强转角位置的力学性能。或者，由于电芯1的内圈受到的挤压力最大，极片或隔膜13很容易出现断裂，将膜片14贴合于极片和隔膜13的卷绕后的内圈位置，可以防止断裂的发生。
根据需要，可以将膜片14贴合于第一极片11、第二极片12和隔膜13的内侧面或外侧面，或者同时贴合于内侧面和外侧面。内侧面是指极片或隔膜13卷绕后朝向电芯中心轴线的内周面，外侧面是与内侧面相对的、极片或隔膜13的外周面。在极片和隔膜13的转角位置，内侧面受到挤压，外侧面受到拉伸，将膜片14贴合于极片和隔膜13的内侧面可以防止极片掉粉，将膜片14贴合于极片和隔膜13的外侧面可以防止极片断裂。
以下实施例中，以膜片14贴合在隔膜13上为例进行详细说明。
如图3所示，贴膜机构3将膜片14贴合在隔膜13的预定位置，以使隔膜13上形成增强膜层。贴合有增强膜层的隔膜13被传送至卷绕机构2，卷绕机构2将贴合 有增强膜层的隔膜13与第一极片11和第二极片12一同卷绕，形成电芯1。
图3中只显示了一个贴膜机构3，对隔膜13进行贴膜，当然，图3只是一个示例，贴膜机构3也可以对第一极片11或第二极片12进行贴膜，或者，电芯制作设备100也可以包括多个贴膜机构3，分别对第一极片11、第二极片12及隔膜13中的一者或多者进行贴膜。
在一个具体实施例中，在将第一极片11、第二极片12和隔膜13卷绕为电芯1时，每输送预定长度的隔膜13，贴膜机构3对隔膜13进行一次贴膜，将膜片14贴合于隔膜13上，在隔膜13上形成间隔一定距离的多个增强膜层。隔膜13上相邻增强膜层的间距可以根据电芯1的结构和受力情况进行设置，例如，可以在隔膜13的预定位置贴合一段膜片14，使一个电芯1内形成有一段增强膜层，也可以在隔膜13的多个预定位置分别贴合一段膜片14，使一个电芯1内形成有多段增强膜层。
通过本实施例的电芯制作设备100，在制作电芯1的过程中，在向卷绕机构2输送第一极片11、第二极片12和隔膜13的同时，通过贴膜机构3在第一极片11、第二极片12或隔膜13上贴合膜片14，形成增强膜层，增强极片或隔膜13的力学性能。
图4为本申请另一实施例的电芯制作设备100的示意图。
如图4所示，在另一实施例中，电芯制作设备100还包括极片放卷单元4、隔膜放卷单元5、极片传输单元6和隔膜传输单元7。电芯制作设备100的卷绕机构2和贴膜机构3与上述实施例中方案相同。
极片放卷单元4用于向卷绕机构2提供极片，本实施例中，电芯制作设备100包括两个极片放卷单元4，分别提供第一极片11和第二极片12；隔膜放卷单元5用于向卷绕机构2提供隔膜13，本实施例中，电芯制作设备100包括两个隔膜放卷单元5。极片放卷单元4和隔膜放卷单元5的数量并不限于两个，其数量可以根据电芯1的具体结构形式进行设置。
对应每个极片放卷单元4，设置一个极片传输单元6，极片放卷单元4输出极片至极片传输单元6，本实施例中，两个极片放卷单元4分别输出第一极片11和第二极片12至相对应的极片传输单元6。对应每个隔膜放卷单元5，设置一个隔膜传输单元7，隔膜放卷单元5输出隔膜13至隔膜传输单元7，本实施例中，两个隔膜放卷单元5分别输出隔膜13至相对应的隔膜传输单元7；极片传输单元6和隔膜传输单元7分别将第一极片11、第二极片12和隔膜13传送至卷绕机构2。卷绕机构2将第一极片11、第二极片12和隔膜13卷绕预定圈数形成电芯1。
图5为本申请一个具体实施例的贴膜机构3的示意图。
如图5所示，在一个具体实施例中，贴膜机构3包括膜片放卷单元31、切断单元32和贴合单元33。
膜片放卷单元31用于输送膜片14；切断单元32设置在膜片放卷单元31和贴合单元33之间，切断单元32用于在膜片放卷单元31输送预定长度的膜片14时，切断膜片14，膜片14的预定长度和宽度可以根据电芯1的具体结构进行设置和调整；贴合单元33，将被切断单元32切断的膜片14贴合在隔膜13的预定位置。
如图4和图5所示，在一个具体实施例中，贴膜机构3设置在隔膜放卷单元5 之后，隔膜放卷单元5传输隔膜13至贴膜机构3的贴合单元33，贴合单元33将膜片14贴合至隔膜13上，形成增强膜层，提高隔膜13的力学性能。
如图5所示，在一个具体实施例中，贴合单元33包括吸膜机构331和压合机构332。吸膜机构331用于吸附被切割的膜片14；压合机构332将被吸附的膜片14压合在隔膜13的预定位置。
在一个具体实施例中，经过压合机构332的隔膜13传输了预定长度后，贴合单元33再进行膜片14的贴合操作，从而使膜片14贴合在隔膜13的预定位置。例如，隔膜13的预定位置设定为电芯1的隔膜13的内圈位置时，可以在隔膜13传输的初始位置进行一次贴膜操作，在继续传输了一个电芯1的长度的隔膜13后，再进行下一次贴膜操作，从而使每个电芯1卷绕的隔膜13内圈上形成增强膜层，以增强隔膜13的力学性能。
在一个具体实施例中，压合机构332设置有加热装置。在对隔膜13进行贴膜操作时，加热装置对膜片14进行加热，使膜片14的被加热区域发生熔融而具有粘性，从而使膜片14与隔膜13热复合在一起。
在一些实施例中，压合机构332可以采用压辊。在膜片放卷单元31提供预定长度的膜片14后，切断单元32将膜片14切断，并将预定长度的膜片14传输至贴合单元33的吸膜机构331上，吸膜机构331将切断的预定长度的膜片14吸附并传输至压辊，同时，隔膜放卷单元5将隔膜13传送至压辊，压辊将吸附在吸膜机构331上的膜片14压合至隔膜13上，此时，在经过压辊辊压的隔膜13上形成增强膜层。
压辊中可以设置加热装置，在对隔膜13进行贴膜操作时，压辊将隔膜13和吸膜机构331吸附的膜片14进行加热并辊压为一体，从而在隔膜13上形成增强膜层。
在另一些实施例中，压合机构332可以采用压板。在膜片放卷单元31提供预定长度的膜片14后，切断单元32将膜片14切断，并将预定长度的膜片14传输至贴合单元33的吸膜机构331，吸膜机构331将切断的预定长度的膜片14吸附并传输至压板，同时，隔膜放卷单元5将隔膜13传送至压板，压板将吸附在吸膜机构331上的膜片14压合至隔膜13上，此时，在经过压板挤压的隔膜13上形成增强膜层。
压板中可以设置加热装置，在对隔膜13进行贴膜操作时，压板将隔膜13和吸膜机构331吸附的膜片14进行加热并压合为一体，从而在隔膜13上形成增强膜层。
图6为本申请另一实施例的电芯制作设备100的示意图。
在卷绕机构2对第一极片11、第二极片12和隔膜13进行卷绕操作时，极片放卷单元4和隔膜放卷单元5的放卷速度、以及极片传输单元6和隔膜传输单元7的传输速度会有一定差异，极片和隔膜13的传输速度并非恒定,如果根据极片或隔膜13的传输速度控制贴膜的位置，贴膜位置会产生偏差，从而无法准确贴膜，影响增强膜层的效果。
如图6所示，在另一实施例中，为了使贴膜机构3能够将膜片14准确地贴合到隔膜13的预定位置上，电芯制作设备100还包括送料单元8，送料单元8用于传输预定长度的极片或隔膜13，贴膜机构3根据每个预定长度的极片或隔膜13确定贴膜位置，从而能够将膜片14准确地贴合至隔膜13的预定位置，保证增强膜层位置的精确 度。
本实施例中，电芯制作设备100的卷绕机构2、贴膜机构3、极片放卷单元4、隔膜放卷单元5、极片传输单元6和隔膜传输单元7与上述实施例相同。
如图6所示，本实施例的送料单元8设置在贴膜机构3和卷绕机构2之间，具体地，可以设置在贴膜机构3和隔膜传输机构7之间，以传输预定长度的隔膜13。
当对第一极片11、第二极片12、隔膜13中的多者进行贴膜时，可以设置多个贴膜机构3，在每个贴膜机构3后设置送料单元8，以传输预定长度的第一极片11、第二极片12或隔膜13。
本实施例中以对隔膜13进行贴膜为例进行详细说明。
隔膜放卷单元5输出隔膜13至贴膜机构3，贴膜机构3对隔膜13进行贴膜，将膜片14贴合至隔膜13上，形成增强膜层，并传输至送料单元8。送料单元8上可以保持预定长度的隔膜13，并将贴膜后的预定长度的隔膜13传输至隔膜传输单元7，隔膜传输单元7将隔膜13传送至卷绕机构2。
在一个具体实施例中，贴膜机构3将膜片14贴合在隔膜13的预定位置形成增强膜层，并传输至送料单元8。送料单元8上保持有预定长度的隔膜13，并将预定长度的隔膜13传输至隔膜传输单元7，隔膜传输单元7将隔膜13传送至卷绕机构2。如图6所示，隔膜13具有第一贴膜位置131，该第一贴膜位置131传输至卷绕机构2时，卷绕机构2将第一极片11、第二极片12及预定长度的隔膜13进行卷绕，此时，贴膜机构3将下一段膜片14贴合在隔膜13的第二贴膜位置132，随着卷绕机构2对隔膜13进行卷绕，隔膜13的第一贴膜位置131卷入电芯1内，第二贴膜位置132传入送料单元8，并传向卷绕机构2。
在一个具体实施例中，第一贴膜位置131至第二贴膜位置132之间的隔膜13的长度设定为卷绕一个电芯1所需隔膜13的长度，这种情况下，在开始一个电芯1的卷绕时，即开始下一个电芯1的隔膜13的贴膜操作，能够准确控制在电芯1的隔膜13的固定位置上形成增强膜层。
在第一贴膜位置131和第二贴膜位置132贴合膜片14只是一个例子，可以根据具体的电芯1内部结构的力学性能要求选择在隔膜13的任意位置贴合膜片14，具体的贴膜位置可以通过调整送料单元8上隔膜13的预定长度进行设定。
图7为本申请一实施例的送料单元8的示意图。
如图7所示，送料单元8包括多个送料辊81，多个送料辊81间隔设置，以使多个送料辊81传输预定长度的隔膜13。
在一个具体实施例中，送料单元8包括第一送料辊81a、第二送料辊81b、第三送料辊81c、第四送料辊81d、第五送料辊81e、第六送料辊81f、第七送料辊81g、第八送料辊81h、第九送料辊81i和第十送料辊81j。送料辊81的数量和排列方式可以根据设备和场地的实际情况进行设置，并不限于图7中所显示的数量和排列方式。
在传送隔膜13时，贴膜机构3将膜片14贴合在隔膜13后，将隔膜13传输至送料单元8，隔膜13先传至第一送料辊81a，并根据多个送料辊81的排列方式依 次传入第二送料辊81b、第三送料辊81c、第四送料辊81d、第五送料辊81e、第六送料辊81f、第七送料辊81g、第八送料辊81h、第九送料辊81i和第十送料辊81j，再由第十送料辊81j传送至后续的机构，例如，隔膜传输单元7或卷绕机构2。第一送料辊81a至第十送料辊81j之间传输预定长度的隔膜13，因此，贴膜机构3至卷绕机构2之间传输的隔膜13的长度固定，例如，固定长度为卷绕一个电芯1所需的隔膜13的长度。
如图7所示，多个送料辊81分布在中线X的两侧，例如，送料辊81a、81c、81e、81g、81i位于中线X的一侧，送料辊81b、81d、81f、81h、81j位于中线X的另一侧。隔膜13由第一送料辊81a传输至第二送料辊81b，第二送料辊81b再将隔膜13传输至第三送料辊81c，直至将隔膜13输送至第十送料辊81j，隔膜13在多个送料辊81间呈蛇形传输，因此送料单元8能传输相对较长的隔膜13，并节省空间。当然，多个送料辊81的排列方式并不仅限于上述的蛇形排列，可以根据需要具体布置排列。
使用多个送料辊81，可以灵活调整贴膜的位置。
在一个具体实施例中，可以将位于中线X一侧的一个或多个送料辊81位置设置为可调，从而能够调整一个送料辊81传输至下一个送料辊81之间的隔膜13的长度。也可以将两侧的送料辊81的位置均设置为可调，可以更灵活地调整多个送料辊81之间的隔膜13的长度，从而精确地确定隔膜13上贴膜的预定位置。
图8为本申请一个具体实施例的送料单元8调整隔膜13传输长度的功能框图。
如图8所示，在一个具体实施例中，电芯制作设备100还包括检测单元10和控制单元9，检测单元10用于检测第一极片11、第二极片12和/或隔膜13的物料参数，并将物料参数传输至控制单元9，控制单元9根据物料参数调整送料辊81的位置，以调整送料单元8传输的第一极片11、第二极片12和/或隔膜13的长度。其中，物料参数包括第一极片11、第二极片12或隔膜13的厚度，第一极片11或第二极片12极耳的位置等参数。
在一些实施例中，在卷绕机构2对第一极片11、第二极片12和隔膜13进行卷绕时，由于第一极片11和第二极片12的厚度不一致，而产生卷绕所需的第一极片11、第二极片12和隔膜13长度有所偏差，因此，检查单元10对第一极片11、第二极片12和/或隔膜13的厚度进行检测，并计算出隔膜13的长度，控制单元9再对送料单元8的送料辊81进行位置调整，使送料单元8上的隔膜长度为预定长度，从而确保隔膜13上的贴膜位置的精确度。
在另一些实施例中，第一极片11和第二极片12上模切有极耳，在卷绕机构2卷绕电芯1时，需要将各极片上的极耳对齐。在卷绕操作时，极耳可能发生错位，为了减少极耳的错位量，在传输第一极片11和第二极片12时，需要根据极耳的位置对第一极片11和第二极片12的传输长度进行调整。由于极片长度的改变，因此也需要调整隔膜13的长度。检测单元10对极耳位置进行检测，并对第一极片11和第二极片12的传输长度进行调整，控制单元9再根据第一极片11和第二极片12的传输 长度，对送料单元8的送料辊81进行位置调整，使送料单元8上的隔膜长度为预定长度，从而确保隔膜13上的贴膜位置的精确度。
图9为本申请一个具体实施例的传感器101检测送料辊81的功能框图。
如图9所示，在一个具体实施例中，检测单元10包括传感器101，传感器101与送料单元8连接，对多个送料辊81的位置进行检测，并将检测结果传送给控制单元9；控制单元9根据检测结果，调整送料单元8传输的隔膜13的长度。
传感器101对多个送料辊81的位置进行检测，控制单元9根据检测结果计算送料单元8上的隔膜13的长度，当隔膜13的长度大于或小于设定的预定长度时，则判定为隔膜13长度过长或不足，并对送料辊81的位置进行调整，从而保证送料单元8上的隔膜13的长度等于预先设定的长度。
图10为本申请一个具体实施例的控制单元9控制送料单元8调整隔膜13传输长度的功能框图。
如图10所示，在一个具体实施例中，控制单元9包括计算机91、触摸屏92和控制器93。
在一些实施例中，检测单元10检测隔膜13的物料参数，并将物料参数传送至控制单元9的计算机91，计算机91根据物料参数，计算出送料单元8上隔膜13的预订长度，并在计算机91上显示实时结果。计算机91将计算结果传送给控制器93，控制器93根据计算结果调整送料辊81位置，从而使送料单元上的隔膜13长度为预定长度。
在另一些实施例中，检测单元10检测多个送料辊81的位置，并将送料辊81的位置信息传送至控制单元9的计算机91，计算机91根据送料辊81的位置信息，计算出当前送料单元8上隔膜13的长度，并在计算机91上显示实时结果。计算机91将计算结果传送给控制器93，控制器93根据计算结果调整送料辊81位置，从而使送料单元8上的隔膜13长度为预定长度。
操作者也可以通过触摸屏92输入控制指令，对送料单元8上隔膜13的预定长度进行预设，并控制控制器93对送料辊81的位置进行调整，以使送料单元8送出预定长度的隔膜13。
图11为本申请一实施例的电芯制作方法流程图。
本申请还提供一种电芯1的制作方法，电芯1包括第一极片11、第二极片12和隔膜13，该方法包括以下步骤：
步骤S1，将膜片14贴合在第一极片11、第二极片12或隔膜13的预定位置，在第一极片11、第二极片12或隔膜13上形成增强膜层。
膜片14可以贴合在第一极片11、第二极片12、隔膜13中的任意一者或多者上。
步骤S2，对第一极片11、第二极片12和隔膜13进行卷绕，形成电芯1。
在一个具体实施例中，电芯制作方法还包括以下步骤：输送预定长度的第一极片11、第二极片12和隔膜13；每完成一次预定长度的第一极片11、第二极片12和隔膜13的传输时，将膜片14贴合在第一极片11、第二极片12或隔膜13的预定位 置，在第一极片11、第二极片12或隔膜13上形成间隔一定距离的多个增强膜层。
相邻的增强膜层的间距可以根据电芯1的结构和受力情况进行设置，例如，可以在隔膜13的预定位置贴合一段膜片14，使一个电芯1内形成有一段增强膜层，也可以在隔膜13的多个预定位置分别贴合一段膜片14，使一个电芯1内形成有多段增强膜层。
在一个具体实施例中，电芯制作方法还包括以下步骤：调节第一极片11、第二极片12或隔膜13的输送距离，以传输预定长度的第一极片11、第二极片12或隔膜13。
在隔膜13上贴合膜片14时，将隔膜13的贴膜位置至卷绕位置的隔膜13的长度固定，每传输一次预定长度的隔膜13，在隔膜13的下一个预定位置贴合膜片14，从而保证隔膜13上的每个贴膜位置为预定位置，确保贴膜位置的精确度。
在电芯制作方法的一个具体实施例中，调节第一极片11、第二极片12或隔膜13的输送距离，以传输预定长度的第一极片11、第二极片12或隔膜13，包括：检测第一极片11、第二极片12或隔膜13的物料参数，并根据物料参数调整第一极片11、第二极片12或隔膜13的输送距离，以传输预定长度的第一极片11、第二极片12或隔膜13。每传输一次预定长度的第一极片11、第二极片12或隔膜13，在下一个预定位置贴合一段膜片14，从而能够保证每个贴膜位置为预定位置，保证了贴膜位置的精确度。其中，物料参数包括第一极片11、第二极片12或隔膜13的厚度，第一极片11或第二极片12极耳的位置等参数。
在一些实施例中，在对第一极片11、第二极片12和隔膜13进行卷绕时，由于第一极片11和第二极片12的厚度不一致，而产生卷绕所需的第一极片11、第二极片12和隔膜13长度有所偏差，因此，对第一极片11、第二极片12和/或隔膜13的厚度进行检测，并计算出隔膜13的长度，再对输送的隔膜13的长度进行调整，使隔膜长度为预定长度，从而确保隔膜13上的贴膜位置的精确度。
在另一些实施例中，第一极片11和第二极片12上模切有极耳，在卷绕电芯1时，需要将各极片上的极耳对齐。在卷绕操作时，极耳可能会发送错位，为了减少极耳的错位量，在传输第一极片11和第二极片12时，需要根据极耳的位置对第一极片11和第二极片12的传输长度进行调整。由于极片长度的改变，因此也需要调整隔膜13的长度。对极耳位置进行检测，并对第一极片11和第二极片12的传输长度进行调整，再根据第一极片11和第二极片12的传输长度，对输送的隔膜13的长度进行调整，使隔膜长度为预定长度，从而确保隔膜13上的贴膜位置的精确度。
本申请的电芯制作设备100及其方法，在制作电芯1过程中，能够在输送第一极片11、第二极片12和隔膜13的同时，将膜片14贴合至第一极片11、第二极片12或者隔膜13的预定位置，减少工序，提高电芯1卷绕效率。并且，在卷绕电芯1时，调整第一极片11、第二极片12或隔膜13的传输长度，从而调整贴膜的预定位置，保证增强膜层位置的精确度。
本申请提供的电池D，其电池中的电芯通过上述电芯制作设备100制作，在电芯极片和隔膜的至少一个预定位置贴合有增强膜层，增强了极片和隔膜的力学性 能，提高电池的使用寿命。
本申请提供的用电装置，例如车辆A，其使用电池D提供电能，该电池D的电芯利用上述电芯制作设备100制作，电池D使用寿命高，延长了电池D的使用周期，节约成本。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (18)

  1. 一种电芯制作设备，用于制作电芯，所述电芯包括极片和隔膜，所述电芯制作设备包括：
    卷绕机构，用于对所述极片和所述隔膜进行卷绕，形成所述电芯；和
    贴膜机构，用于在卷绕所述极片和所述隔膜前，将膜片贴合在极片或隔膜的预定位置，以使所述极片或所述隔膜上形成增强膜层。
  2. 根据权利要求1所述的电芯制作设备，其中，所述电芯制作设备还包括送料单元，所述送料单元设置在所述贴膜机构和所述卷绕机构之间，所述送料单元用于传输预定长度的所述极片或所述隔膜，以使所述贴膜机构能够根据预定长度的所述极片或所述隔膜的传输以确定所述预定位置。
  3. 根据权利要求2所述的电芯制作设备，其中，所述送料单元包括多个送料辊，多个所述送料辊间隔设置，以使多个所述送料辊之间传输预定长度的所述极片或所述隔膜。
  4. 根据权利要求3所述的电芯制作设备，其中，多个所述送料辊中的至少一个所述送料辊的位置可调，以调整所述送料单元传输的所述极片或所述隔膜的长度。
  5. 根据权利要求4所述的电芯制作设备，其中，所述电芯制作设备还包括检测单元和控制单元，所述检测单元用于检测所述极片或所述隔膜的物料参数，并将所述物料参数传输至所述控制单元，所述控制单元根据所述物料参数调整所述送料辊的位置，以调整所述送料单元传输的所述极片或所述隔膜的长度。
  6. 根据权利要求5所述的电芯制作设备，其中，所述检测单元包括传感器，所述传感器与所述送料单元连接，对多个所述送料辊的位置进行检测，并将检测结果传送给所述控制单元；所述控制单元根据检测结果调整所述送料单元传输的所述极片或所述隔膜的长度。
  7. 根据权利要求1-6任一项所述的电芯制作设备，其中，所述贴膜机构包括，
    膜片放卷单元，用于输送所述膜片；
    切断单元，用于在所述膜片放卷单元输送预定长度的所述膜片时，切断所述膜片；和
    贴合单元，将被所述切断单元切割的所述膜片贴合在所述极片或所述隔膜的所述预定位置。
  8. 根据权利要求7所述的电芯制作设备，其中，所述贴合单元包括：
    吸膜机构，用于吸附所述被切割的膜片；
    压合机构，将被吸附的所述膜片压合在所述极片或所述隔膜的所述预定位置。
  9. 根据权利要求8所述的电芯制作设备，其中，所述压合机构设置有加热装置。
  10. 根据权利要求9所述的电芯制作设备，其中，所述压合机构为压辊或压板。
  11. 根据权利要求1-10任一项所述的电芯制作设备，其中，所述电芯制作设备还包括极片放卷单元、隔膜放卷单元、极片传输单元和隔膜传输单元，所述极片放卷单元用于输出所述极片至所述极片传输单元，所述隔膜放卷单元用于输出所述隔膜至所述 隔膜传输单元，所述极片传输单元和所述隔膜传输单元分别用于将所述极片和所述隔膜传送至所述卷绕机构。
  12. 根据权利要求1-11任一项所述的电芯制作设备，其中，所述预定位置为所述极片或所述隔膜在卷绕时发生弯折的位置。
  13. 一种电芯制作方法，所述电芯包括极片和隔膜，其中，包括以下步骤：
    将膜片贴合在所述极片或所述隔膜的预定位置，使所述极片或所述隔膜上形成增强膜层；
    对所述极片和所述隔膜进行卷绕，形成所述电芯。
  14. 根据权利要求13所述的电芯制作方法，其中，还包括以下步骤：
    输送预定长度的所述极片和所述隔膜；
    每完成一次预定长度的所述极片和所述隔膜的传输后，将膜片贴合在极片或隔膜的预定位置。
  15. 根据权利要求13或14所述的电芯制作方法，其中，还包括以下步骤：
    调整所述极片或所述隔膜的输送距离，以传输预定长度的所述极片或隔膜。
  16. 根据权利要求15所述的电芯制作方法，其中，所述调整所述极片或所述隔膜的输送距离，以传输预定长度的所述极片或所述隔膜包括：
    检测所述极片或所述隔膜的物料参数，并根据所述物料参数调整所述极片或所述隔膜的输送距离。
  17. 一种电池，包括电芯，所述电芯由权利要求13-16任一项所述的电芯制作方法制成，所述电芯的所述极片和所述隔膜的至少一个的预定位置贴合有所述膜片。
  18. 一种用电装置，包括权利要求17所述的电池，所述电池用于提供电能。
PCT/CN2022/082761 2021-06-01 2022-03-24 电芯制作设备及其方法、电池和用电装置 WO2022252774A1 (zh)

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