Battery cell manufacturing apparatus and method, battery, and electric device

Abstract

The application provides an electrode core manufacturing device and method, a battery and a power utilization device. The electrode core manufacturing device is used for manufacturing an electrode core including a pole piece and a diaphragm. The electrode core manufacturing device includes a winding mechanism for winding the pole piece and the diaphragm to form the electrode core, and a film pasting mechanism for pasting a film piece to a predetermined position of the pole piece and / or the diaphragm before winding the pole piece and the diaphragm, so as to form a reinforcing film layer on the pole piece and / or the diaphragm. In the process of manufacturing the electrode core, the film piece can be pasted to the predetermined position of the pole piece or the diaphragm while the pole piece and the diaphragm are conveyed, so as to reduce the process and improve the winding efficiency of the electrode core.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cell manufacturing apparatus and method, a battery, and an electrical device. Background Technology

[0002] In the battery manufacturing process, winding equipment is needed to wind electrodes and separators into battery cells. In existing technology, after the battery cell is wound by the winding equipment, the film is then attached to the battery cell. This method cannot enhance the mechanical properties of the electrodes or separators based on the internal structure of the battery cell. Furthermore, the process involves many steps and has low battery cell winding efficiency. Summary of the Invention

[0003] This application provides a battery cell manufacturing apparatus and method, a battery, and an electrical device. During the battery cell manufacturing process, the membrane can be bonded to a predetermined position on the electrode or separator while conveying the electrode and separator, thereby enhancing the mechanical properties of the electrode or separator, reducing the number of processes, and improving the battery cell winding efficiency.

[0004] The first aspect of this application provides a battery cell manufacturing apparatus for manufacturing a battery cell, the battery cell including an electrode and a separator. The battery cell manufacturing apparatus includes: a winding mechanism for winding the electrode and the separator to form a battery cell; and a film-applying mechanism for applying a film to a predetermined position on the electrode or the separator before winding the electrode and the separator, so as to form a reinforcing film layer on the electrode or the separator.

[0005] A film is bonded to a predetermined position on the electrode or separator to form a reinforcing film layer, thereby improving the mechanical properties of the electrode or separator. During the transport of the electrode or separator, the film bonding operation is performed to improve the cell winding efficiency.

[0006] In one possible design, the cell manufacturing equipment also includes a feeding unit disposed between the laminating mechanism and the winding mechanism. The feeding unit is used to transfer an electrode or separator of a predetermined length so that the laminating mechanism can determine a predetermined position based on the transfer of the electrode or separator of the predetermined length.

[0007] The electrode or diaphragm of a predetermined length is conveyed by the feeding unit, thereby determining the predetermined position of the film to be bonded according to the predetermined length, which can precisely control the film bonding position on the electrode or diaphragm.

[0008] In one possible design, the feeding unit includes multiple feeding rollers spaced apart to allow for the transfer of a predetermined length of electrode or diaphragm between the multiple feeding rollers.

[0009] By using multiple spaced feeding rollers, a diaphragm of a predetermined length can be transported, ensuring more precise film placement on the diaphragm.

[0010] In one possible design, the position of at least one of the multiple feed rollers is adjustable to adjust the length of the electrode or diaphragm conveyed by the feeding unit.

[0011] The position of one or more feeding rollers is adjustable, and the length of the electrode or diaphragm on the feeding unit can be adjusted as needed to ensure that the conveyed diaphragm is of a predetermined length.

[0012] In one possible design, the cell manufacturing equipment also includes a detection unit and a control unit. The detection unit is used to detect the material parameters of the electrode or separator and transmit the material parameters to the control unit. The control unit adjusts the position of the feeding roller according to the material parameters to adjust the length of the electrode or separator transmitted by the feeding unit.

[0013] The material parameters are detected by the detection unit, which can then adjust the length of the conveyed diaphragm based on the material parameters, ensuring that the diaphragm length on the feeding unit is the predetermined length, thereby accurately determining the predetermined position of the film on the diaphragm.

[0014] In one possible design, the detection unit includes a sensor connected to the feeding unit to detect the position of multiple feeding rollers and transmit the detection results to the control unit; the control unit adjusts the length of the electrode or diaphragm conveyed by the feeding unit according to the detection results.

[0015] The sensor detects the position of the feeding roller and can determine whether the length of the diaphragm on the feeding unit matches the set predetermined length.

[0016] In one possible design, the film application mechanism includes: a film unwinding unit for conveying the film; a cutting unit for cutting the film when the film unwinding unit conveys the film of a predetermined length; and a bonding unit for bonding the film cut by the cutting unit to a predetermined position on the electrode or diaphragm.

[0017] The film-applying mechanism can perform a film-applying operation on the electrode or diaphragm during the transfer process, so as to form a reinforcing film layer on the electrode or diaphragm.

[0018] In one possible design, the bonding unit includes: a film suction mechanism for adsorbing the cut film; and a pressing mechanism for pressing the adsorbed film onto a predetermined position on the electrode or diaphragm.

[0019] The membrane is adsorbed and then pressed onto the electrode or diaphragm, making the film application process simpler and improving production efficiency.

[0020] In one possible design, the pressing mechanism is equipped with a heating device.

[0021] The heating device heats the diaphragm, causing it to melt and become sticky, thus making it easier for the diaphragm to thermally bond together.

[0022] In one possible design, the pressing mechanism is a pressure roller or a pressure plate.

[0023] The pressure roller or plate has a simple structure, good film application effect, and high production efficiency.

[0024] In one possible design, the cell manufacturing equipment also includes an electrode unwinding unit, a diaphragm unwinding unit, an electrode transfer unit, and a diaphragm transfer unit. The electrode unwinding unit outputs electrodes to the electrode transfer unit, the diaphragm unwinding unit outputs diaphragms to the diaphragm transfer unit, and the electrode transfer unit and the diaphragm transfer unit transfer the electrodes and diaphragms to the winding mechanism.

[0025] The use of electrode unwinding and diaphragm unwinding units allows for a continuous supply of electrodes and diaphragms, enabling the winding mechanism to continuously wind the battery cells and improving production efficiency. The electrode transfer unit and diaphragm transfer unit provide tension for the transfer of electrodes and diaphragms, and clamp the ends of the cut electrodes and diaphragms and the beginning of the next section of electrodes and diaphragms.

[0026] In one possible design, the predetermined position is the location where the electrode or diaphragm bends during winding.

[0027] Applying a membrane to the location where the electrode or diaphragm bends during winding can enhance the mechanical properties of the bend.

[0028] The second aspect of this application provides a method for manufacturing a battery cell, the battery cell including an electrode and a separator, the method comprising the following steps: attaching a membrane to a predetermined position on the electrode or separator to form a reinforcing film layer on the electrode or separator; and winding the electrode and separator to form a battery cell.

[0029] In one possible design, the cell manufacturing method further includes the following steps: conveying an electrode and a separator of a predetermined length; and after each transmission of an electrode and separator of a predetermined length, attaching a membrane to a predetermined position on the electrode or separator.

[0030] In one possible design, the cell manufacturing method further includes the following steps: adjusting the conveying distance of the electrode or separator to convey an electrode or separator of a predetermined length.

[0031] In one possible design, adjusting the conveying distance of the electrode or diaphragm to transport an electrode or diaphragm of a predetermined length includes: detecting the material parameters of the electrode or diaphragm and adjusting the conveying distance of the electrode or diaphragm according to the material parameters.

[0032] A third aspect of this application provides a battery in which the cell is manufactured by the cell manufacturing method described above, wherein a membrane is attached to at least one predetermined position of the electrode and the separator of the cell.

[0033] A fourth aspect of this application provides an electrical device including the battery described above, the battery being used to provide electrical energy.

[0034] The battery cell manufacturing equipment and method of this application can, during the battery cell manufacturing process, simultaneously attach a membrane to a predetermined position on the electrode or separator while conveying the electrode and separator, reducing steps and improving battery cell winding efficiency. Furthermore, by adjusting the conveying distance of the electrode or separator during battery cell winding, the predetermined position of the membrane can be adjusted, ensuring the accuracy of the reinforcing membrane position.

[0035] The battery and power-consuming device of this application, wherein the battery cell is manufactured by the aforementioned battery cell manufacturing equipment and method, and a reinforcing film layer is attached at at least one predetermined position of the battery cell electrode and separator, thereby enhancing the mechanical properties of the electrode and separator and improving the battery's service life. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only specific embodiments of this application. Those skilled in the art can obtain other embodiments based on the following drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the vehicle structure according to Embodiment 1 of this application;

[0038] Figure 2 This is a schematic diagram of a winding mechanism according to an embodiment of the present application, which winds a first electrode, a second electrode, and a diaphragm.

[0039] Figure 3 This is a schematic diagram of a battery cell manufacturing apparatus according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a cell manufacturing apparatus according to another embodiment of this application;

[0041] Figure 5 This is a schematic diagram of a film application mechanism according to a specific embodiment of this application;

[0042] Figure 6 This is a schematic diagram of a cell manufacturing apparatus according to another embodiment of this application;

[0043] Figure 7 This is a schematic diagram of a feeding unit according to an embodiment of this application;

[0044] Figure 8 This is a functional block diagram of the feeding unit for adjusting the diaphragm transport length according to a specific embodiment of this application;

[0045] Figure 9 This is a functional block diagram of a sensor detecting a feeding roller according to a specific embodiment of this application;

[0046] Figure 10This is a functional block diagram of a control unit controlling a feeding unit to adjust the diaphragm transmission length according to a specific embodiment of this application;

[0047] Figure 11 This is a flowchart of a battery cell manufacturing method according to an embodiment of this application.

[0048] Figure label:

[0049] A. Vehicles;

[0050] C. Controller;

[0051] M, motor;

[0052] D. Battery;

[0053] X, midline;

[0054] 100. Battery cell manufacturing equipment;

[0055] 1. Battery cell;

[0056] 11. First electrode;

[0057] 12. Second electrode;

[0058] 13. Diaphragm;

[0059] 131. First film application position;

[0060] 132. Second film application location;

[0061] 14. Membrane;

[0062] 2. Winding mechanism;

[0063] 3. Film application mechanism;

[0064] 31. Diaphragm unwinding unit;

[0065] 32. Cut-off unit;

[0066] 33. Adhesive unit;

[0067] 331. Film suction mechanism;

[0068] 332. Pressing mechanism;

[0069] 4. Electrode unwinding unit;

[0070] 5. Diaphragm unwinding unit;

[0071] 6. Electrode transmission unit;

[0072] 7. Diaphragm transmission unit;

[0073] 8. Feeding unit;

[0074] 81. Feed roller;

[0075] 81a. The first feeding roller;

[0076] 81b. Second feeding roller;

[0077] 81c, Third feed roller;

[0078] 81d, Fourth feed roller;

[0079] 81e, Fifth feed roller;

[0080] 81f, Sixth feed roller;

[0081] 81g, seventh feed roller;

[0082] 81h, the eighth feed roller;

[0083] 81i, Ninth Feed Roller;

[0084] 81j, the tenth feed roller;

[0085] 9. Control unit;

[0086] 91. Computer;

[0087] 92. Touchscreen;

[0088] 93. Controller;

[0089] 10. Detection unit;

[0090] 101. Sensors.

[0091] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0092] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0093] It should be understood that the following embodiments are only some embodiments of this application. Based on the following embodiments, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0094] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0095] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0096] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0097] This application provides a battery D and an apparatus using the battery D as a power source.

[0098] Devices using battery D as a power source include vehicles A, ships, small aircraft, and other equipment. These devices use battery D to provide electrical energy, generating the driving force that propels them. The device can also simultaneously use electrical energy and other types of energy (such as fossil fuels) to jointly generate the driving force. Any device capable of using battery D as a power source is within the scope of protection of this application.

[0099] Figure 1 This is a schematic diagram of a vehicle structure according to an embodiment of this application.

[0100] like Figure 1 As shown, taking vehicle A as an example, vehicle A in this embodiment can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. For example, vehicle A includes a motor M, a controller C, and a battery D. The battery D is horizontally disposed at the bottom of the vehicle body, and the controller C controls the battery D to supply power to the motor M. The motor M is connected to the wheels on the vehicle body through a transmission mechanism, thereby driving vehicle A to move.

[0101] The battery cell of battery D is made by winding electrodes and a separator. During the cell manufacturing process, the winding mechanism of the cell manufacturing equipment winds the electrodes and separator into a cell.

[0102] Figure 2 This is a schematic diagram of a winding mechanism 2 according to an embodiment of the present application, which winds the first electrode 11, the second electrode 12 and the diaphragm 13.

[0103] like Figure 2As shown, the winding mechanism 2 winds the first electrode 11, the second electrode 12, and the separator 13. The first electrode 11 and the second electrode 12 have opposite polarities, with one being the positive electrode and the other the negative electrode. The separator 13 is an insulator located between the first electrode 11 and the second electrode 12. After the first electrode 11, the second electrode 12, and the separator 13 are wound on the winding mechanism 2, they form the battery cell 1.

[0104] Figure 3 This is a schematic diagram of a battery cell manufacturing apparatus 100 according to an embodiment of this application.

[0105] like Figure 3 As shown, the battery cell manufacturing apparatus 100 of this application includes a winding mechanism 2 and a film-applying mechanism 3. The film-applying mechanism 3 applies a film 14 to a predetermined position on the first electrode 11, the second electrode 12, or the separator 13 to form a reinforcing film layer on the first electrode 11, the second electrode 12, or the separator 13. The winding mechanism 2 is used to wind the first electrode 11, the second electrode 12, and the separator 13 to form the battery cell 1.

[0106] The diaphragm 14 can be attached to any one or more of the first electrode 11, the second electrode 12, and the diaphragm 13 to form a reinforcing film layer on the first electrode 11, the second electrode 12, or the diaphragm 13, thereby enhancing the mechanical properties of the electrode or the diaphragm.

[0107] The specific position of the diaphragm 14 attached to the first electrode 11, the second electrode 12, and the separator 13 can be determined based on the structure of the wound cell and the stress conditions of each electrode and separator 13. For example, since the first electrode 11, the second electrode 12, and the separator 13 bend during winding, this bending position is called the corner position. Attaching the diaphragm 14 to the corner position of the electrode or separator 13 can enhance the mechanical properties at the corner position. Alternatively, since the inner ring of the cell 1 experiences the greatest compressive force, the electrode or separator 13 is prone to breakage. Attaching the diaphragm 14 to the inner ring position of the wound electrode and separator 13 can prevent breakage.

[0108] Depending on the requirements, the diaphragm 14 can be attached to the inner or outer surfaces of the first electrode 11, the second electrode 12, and the separator 13, or simultaneously to both inner and outer surfaces. The inner surface refers to the inner circumferential surface of the electrode or separator 13 facing the central axis of the cell after winding, while the outer surface is the outer circumferential surface of the electrode or separator 13 opposite to the inner surface. At the corner positions of the electrode and separator 13, the inner surface is compressed, and the outer surface is stretched. Attaching the diaphragm 14 to the inner surface of the electrode and separator 13 can prevent electrode powder shedding, while attaching the diaphragm 14 to the outer surface of the electrode and separator 13 can prevent electrode breakage.

[0109] In the following embodiments, the example of a diaphragm 14 being attached to a diaphragm 13 will be described in detail.

[0110] like Figure 3 As shown, the film-applying mechanism 3 applies the membrane 14 to a predetermined position on the separator 13 to form a reinforcing film layer on the separator 13. The separator 13 with the reinforcing film layer applied is conveyed to the winding mechanism 2, which winds the separator 13 with the reinforcing film layer applied together with the first electrode 11 and the second electrode 12 to form the battery cell 1.

[0111] Figure 3 Only one film-applying mechanism 3 is shown, which applies the film to the diaphragm 13. Of course, Figure 3 This is just one example. The film-applying mechanism 3 can also apply film to the first electrode 11 or the second electrode 12. Alternatively, the cell manufacturing equipment 100 can include multiple film-applying mechanisms 3, which can apply film to one or more of the first electrode 11, the second electrode 12 and the separator 13 respectively.

[0112] In one specific embodiment, when the first electrode 11, the second electrode 12, and the separator 13 are wound into a battery cell 1, the film-applying mechanism 3 applies a film to the separator 13 once for each predetermined length of separator 13 being transported, attaching a film sheet 14 to the separator 13 to form multiple reinforcing film layers spaced at a certain distance on the separator 13. The spacing between adjacent reinforcing film layers on the separator 13 can be set according to the structure and stress conditions of the battery cell 1. For example, a section of film sheet 14 can be applied to a predetermined position on the separator 13, so that one section of reinforcing film layer is formed in one battery cell 1. Alternatively, a section of film sheet 14 can be applied to multiple predetermined positions on the separator 13, so that multiple sections of reinforcing film layer are formed in one battery cell 1.

[0113] In the process of manufacturing the battery cell 1, the battery cell 1 is manufactured by the battery cell manufacturing equipment 100 of this embodiment. While the first electrode 11, the second electrode 12 and the separator 13 are being fed to the winding mechanism 2, the film bonding mechanism 3 is used to bond a film 14 onto the first electrode 11, the second electrode 12 or the separator 13 to form a reinforcing film layer and enhance the mechanical properties of the electrode or the separator 13.

[0114] Figure 4 This is a schematic diagram of a cell manufacturing apparatus 100 according to another embodiment of this application.

[0115] like Figure 4 As shown, in another embodiment, the cell manufacturing equipment 100 further includes an electrode unwinding unit 4, a separator unwinding unit 5, an electrode transfer unit 6, and a separator transfer unit 7. The winding mechanism 2 and the film-applying mechanism 3 of the cell manufacturing equipment 100 are the same as those in the above embodiments.

[0116] The electrode unwinding unit 4 is used to provide electrode sheets to the winding mechanism 2. In this embodiment, the cell manufacturing equipment 100 includes two electrode unwinding units 4, which respectively provide the first electrode sheet 11 and the second electrode sheet 12. The diaphragm unwinding unit 5 is used to provide the diaphragm 13 to the winding mechanism 2. In this embodiment, the cell manufacturing equipment 100 includes two diaphragm unwinding units 5. The number of electrode unwinding units 4 and diaphragm unwinding units 5 is not limited to two, and their number can be set according to the specific structural form of the cell 1.

[0117] For each electrode unwinding unit 4, an electrode transfer unit 6 is provided. The electrode unwinding unit 4 outputs an electrode to the electrode transfer unit 6. In this embodiment, the two electrode unwinding units 4 respectively output the first electrode 11 and the second electrode 12 to the corresponding electrode transfer unit 6. For each diaphragm unwinding unit 5, a diaphragm transfer unit 7 is provided. The diaphragm unwinding unit 5 outputs a diaphragm 13 to the diaphragm transfer unit 7. In this embodiment, the two diaphragm unwinding units 5 respectively output the diaphragm 13 to the corresponding diaphragm transfer unit 7. The electrode transfer unit 6 and the diaphragm transfer unit 7 respectively transfer the first electrode 11, the second electrode 12, and the diaphragm 13 to the winding mechanism 2. The winding mechanism 2 winds the first electrode 11, the second electrode 12, and the diaphragm 13 a predetermined number of turns to form the battery cell 1.

[0118] Figure 5 This is a schematic diagram of the film application mechanism 3 according to a specific embodiment of this application.

[0119] like Figure 5 As shown, in one specific embodiment, the film application mechanism 3 includes a film unwinding unit 31, a cutting unit 32, and a bonding unit 33.

[0120] The unwinding unit 31 is used to transport the diaphragm 14; the cutting unit 32 is disposed between the unwinding unit 31 and the bonding unit 33. The cutting unit 32 is used to cut the diaphragm 14 when the unwinding unit 31 transports the diaphragm 14 of a predetermined length. The predetermined length and width of the diaphragm 14 can be set and adjusted according to the specific structure of the battery cell 1; the bonding unit 33 bonds the diaphragm 14 cut by the cutting unit 32 to a predetermined position on the diaphragm 13.

[0121] like Figure 4 and Figure 5 As shown, in one specific embodiment, the film-applying mechanism 3 is located after the diaphragm unwinding unit 5. The diaphragm unwinding unit 5 transmits the diaphragm 13 to the bonding unit 33 of the film-applying mechanism 3. The bonding unit 33 applies the film 14 to the diaphragm 13 to form a reinforcing film layer and improve the mechanical properties of the diaphragm 13.

[0122] like Figure 5As shown, in one specific embodiment, the bonding unit 33 includes a film suction mechanism 331 and a pressing mechanism 332. The film suction mechanism 331 is used to suction the cut film 14; the pressing mechanism 332 presses the suctioned film 14 onto a predetermined position on the diaphragm 13.

[0123] In one specific embodiment, after the diaphragm 13 has been transported to a predetermined length by the pressing mechanism 332, the bonding unit 33 performs a bonding operation on the diaphragm 14, thereby bonding the diaphragm 14 to a predetermined position on the diaphragm 13. For example, when the predetermined position of the diaphragm 13 is set to the inner ring position of the diaphragm 13 of the battery cell 1, a bonding operation can be performed at the initial position of the diaphragm 13 during transport. After the diaphragm 13 of the length of one battery cell 1 is transported, the next bonding operation is performed, thereby forming a reinforcing film layer on the inner ring of the diaphragm 13 wound around each battery cell 1 to enhance the mechanical properties of the diaphragm 13.

[0124] In one specific embodiment, the pressing mechanism 332 is provided with a heating device. When the diaphragm 13 is laminated, the heating device heats the diaphragm 14, causing the heated area of ​​the diaphragm 14 to melt and become adhesive, thereby thermally bonding the diaphragm 14 and the diaphragm 13 together.

[0125] In some embodiments, the pressing mechanism 332 may be a pressure roller. After the film unwinding unit 31 provides a film 14 of a predetermined length, the cutting unit 32 cuts the film 14 and transfers the film 14 of the predetermined length to the film suction mechanism 331 of the bonding unit 33. The film suction mechanism 331 adsorbs the cut film 14 of the predetermined length and transfers it to the pressure roller. At the same time, the diaphragm unwinding unit 5 transfers the diaphragm 13 to the pressure roller. The pressure roller presses the film 14 adsorbed on the film suction mechanism 331 onto the diaphragm 13. At this time, a reinforcing film layer is formed on the diaphragm 13 after being pressed by the pressure roller.

[0126] A heating device can be installed in the pressure roller. When applying the film to the diaphragm 13, the pressure roller heats the diaphragm 13 and the film 14 adsorbed by the film suction mechanism 331 and rolls them together to form a reinforcing film layer on the diaphragm 13.

[0127] In other embodiments, the pressing mechanism 332 may be a pressure plate. After the film unwinding unit 31 provides a film 14 of a predetermined length, the cutting unit 32 cuts the film 14 and transfers the film 14 of the predetermined length to the film suction mechanism 331 of the bonding unit 33. The film suction mechanism 331 adsorbs the cut film 14 of the predetermined length and transfers it to the pressure plate. At the same time, the diaphragm unwinding unit 5 transfers the diaphragm 13 to the pressure plate. The pressure plate presses the film 14 adsorbed on the film suction mechanism 331 onto the diaphragm 13. At this time, a reinforcing film layer is formed on the diaphragm 13 after being squeezed by the pressure plate.

[0128] A heating device can be installed in the pressure plate. When applying the membrane to the diaphragm 13, the pressure plate heats and presses the diaphragm 13 and the membrane 14 adsorbed by the membrane suction mechanism 331 into one piece, thereby forming a reinforcing membrane layer on the diaphragm 13.

[0129] Figure 6 This is a schematic diagram of a cell manufacturing apparatus 100 according to another embodiment of this application.

[0130] When the winding mechanism 2 winds the first electrode 11, the second electrode 12, and the diaphragm 13, the unwinding speed of the electrode unwinding unit 4 and the diaphragm unwinding unit 5, as well as the transmission speed of the electrode transmission unit 6 and the diaphragm transmission unit 7, will have certain differences. The transmission speed of the electrode and the diaphragm 13 is not constant. If the position of the film is controlled according to the transmission speed of the electrode or the diaphragm 13, the film position will be deviated, thus making it impossible to accurately apply the film and affecting the effect of the reinforcing film layer.

[0131] like Figure 6 As shown, in another embodiment, in order to enable the film-applying mechanism 3 to accurately apply the film 14 to the predetermined position of the separator 13, the cell manufacturing equipment 100 further includes a feeding unit 8, which is used to transport electrode sheets or separators 13 of a predetermined length. The film-applying mechanism 3 determines the film-applying position according to each electrode sheet or separator 13 of a predetermined length, thereby enabling the film 14 to be accurately applied to the predetermined position of the separator 13, ensuring the accuracy of the reinforcing film layer position.

[0132] In this embodiment, the winding mechanism 2, film application mechanism 3, electrode unwinding unit 4, diaphragm unwinding unit 5, electrode transfer unit 6, and diaphragm transfer unit 7 of the cell manufacturing equipment 100 are the same as those in the above embodiment.

[0133] like Figure 6 As shown, in this embodiment, the feeding unit 8 is disposed between the film-applying mechanism 3 and the winding mechanism 2. Specifically, it can be disposed between the film-applying mechanism 3 and the diaphragm transmission unit 7 to transmit a diaphragm 13 of a predetermined length.

[0134] When applying films to multiple of the first electrode 11, second electrode 12, and diaphragm 13, multiple film application mechanisms 3 can be set up, and a feeding unit 8 can be set up after each film application mechanism 3 to transport the first electrode 11, second electrode 12, or diaphragm 13 of a predetermined length.

[0135] This embodiment uses the example of applying a film to the diaphragm 13 for detailed explanation.

[0136] The diaphragm unwinding unit 5 outputs the diaphragm 13 to the film-applying mechanism 3, which applies the film 14 to the diaphragm 13 to form a reinforcing film layer, and then transfers it to the feeding unit 8. The feeding unit 8 can hold the diaphragm 13 of a predetermined length and transfers the film-applied diaphragm 13 of the predetermined length to the diaphragm transport unit 7, which then transfers the diaphragm 13 to the winding mechanism 2.

[0137] In one specific embodiment, the film-applying mechanism 3 applies the film 14 to a predetermined position on the diaphragm 13 to form a reinforcing film layer, and then transfers it to the feeding unit 8. The feeding unit 8 holds a diaphragm 13 of a predetermined length and transfers the diaphragm 13 of the predetermined length to the diaphragm transfer unit 7, which then transfers the diaphragm 13 to the winding mechanism 2. Figure 6 As shown, the diaphragm 13 has a first film-applying position 131. When the first film-applying position 131 is transmitted to the winding mechanism 2, the winding mechanism 2 winds the first electrode 11, the second electrode 12 and the diaphragm 13 of a predetermined length. At this time, the film-applying mechanism 3 applies the next section of film 14 to the second film-applying position 132 of the diaphragm 13. As the winding mechanism 2 winds the diaphragm 13, the first film-applying position 131 of the diaphragm 13 is wound into the cell 1, and the second film-applying position 132 is transmitted to the feeding unit 8 and then to the winding mechanism 2.

[0138] In one specific embodiment, the length of the diaphragm 13 between the first film application position 131 and the second film application position 132 is set to the length of the diaphragm 13 required to wind one battery cell 1. In this case, when the winding of one battery cell 1 begins, that is, when the film application operation of the diaphragm 13 of the next battery cell 1 begins, the formation of the reinforcing film layer at the fixed position of the diaphragm 13 of the battery cell 1 can be accurately controlled.

[0139] The application of the membrane 14 at the first application position 131 and the second application position 132 is just an example. The membrane 14 can be applied at any position of the separator 13 according to the mechanical performance requirements of the internal structure of the specific battery cell 1. The specific application position can be set by adjusting the predetermined length of the separator 13 on the feeding unit 8.

[0140] Figure 7 This is a schematic diagram of a feeding unit 8 according to an embodiment of this application.

[0141] like Figure 7 As shown, the feeding unit 8 includes a plurality of feeding rollers 81, which are spaced apart to allow the plurality of feeding rollers 81 to transport a diaphragm 13 of a predetermined length.

[0142] In one specific embodiment, 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 81g, an eighth feeding roller 81h, a ninth feeding roller 81i, and a tenth feeding roller 81j. The number and arrangement of the feeding rollers 81 can be set according to the actual conditions of the equipment and site, and are not limited to this. Figure 7 The quantity and arrangement shown in the image.

[0143] When conveying the diaphragm 13, the film-applying mechanism 3 applies the film 14 to the diaphragm 13 and then conveys the diaphragm 13 to the feeding unit 8. The diaphragm 13 is first conveyed to the first feeding roller 81a, and then sequentially fed to the second feeding roller 81b, the third feeding roller 81c, the fourth feeding roller 81d, the fifth feeding roller 81e, the sixth feeding roller 81f, the seventh feeding roller 81g, the eighth feeding roller 81h, the ninth feeding roller 81i, and the tenth feeding roller 81j according to the arrangement of the multiple feeding rollers 81. It is then conveyed by the tenth feeding roller 81j to the subsequent mechanism, such as the diaphragm conveying unit 7 or the winding mechanism 2. A predetermined length of diaphragm 13 is conveyed between the first feeding roller 81a and the tenth feeding roller 81j. Therefore, the length of the diaphragm 13 conveyed between the film-applying mechanism 3 and the winding mechanism 2 is fixed. For example, the fixed length is the length of the diaphragm 13 required to wind one battery cell 1.

[0144] like Figure 7 As shown, multiple feed rollers 81 are distributed on both sides of the center line X. For example, feed rollers 81a, 81c, 81e, 81g, and 81i are located on one side of the center line X, while feed rollers 81b, 81d, 81f, 81h, and 81j are located on the other side. The diaphragm 13 is conveyed by the first feed roller 81a to the second feed roller 81b, which then conveys the diaphragm 13 to the third feed roller 81c, and so on, until the diaphragm 13 is conveyed to the tenth feed roller 81j. The diaphragm 13 is conveyed in a serpentine pattern among the multiple feed rollers 81, thus the feeding unit 8 can convey relatively long diaphragms 13 and save space. Of course, the arrangement of the multiple feed rollers 81 is not limited to the serpentine arrangement described above; they can be arranged according to specific needs.

[0145] Using multiple feed rollers 81, the position of the film can be flexibly adjusted.

[0146] In one specific embodiment, the positions of one or more feed rollers 81 located on one side of the center line X can be set to adjustable, thereby allowing adjustment of the length of the diaphragm 13 between one feed roller 81 and the next. Alternatively, the positions of both feed rollers 81 can be set to adjustable, allowing for more flexible adjustment of the length of the diaphragm 13 between multiple feed rollers 81, thereby accurately determining the predetermined position of the film applied to the diaphragm 13.

[0147] Figure 8 This is a functional block diagram of the feeding unit 8 adjusting the transmission length of the diaphragm 13 according to a specific embodiment of this application.

[0148] like Figure 8 As shown, in one specific embodiment, the cell manufacturing equipment 100 further includes a detection unit 10 and a control unit 9. The detection unit 10 is used to detect the material parameters of the first electrode 11, the second electrode 12, and / or the separator 13, 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 to adjust the length of the first electrode 11, the second electrode 12, and / or the separator 13 transmitted by the feeding unit 8. The material parameters include the thickness of the first electrode 11, the second electrode 12, or the separator 13, and the position of the tabs of the first electrode 11 or the second electrode 12, etc.

[0149] In some embodiments, when the winding mechanism 2 winds the first electrode 11, the second electrode 12, and the diaphragm 13, the thicknesses of the first electrode 11 and the second electrode 12 are inconsistent, resulting in a deviation in the lengths of the first electrode 11, the second electrode 12, and the diaphragm 13 required for winding. Therefore, the detection unit 10 detects the thicknesses of the first electrode 11, the second electrode 12, and / or the diaphragm 13 and calculates the length of the diaphragm 13. The control unit 9 then 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 film application position on the diaphragm 13.

[0150] In other embodiments, tabs are die-cut onto the first electrode 11 and the second electrode 12. When the winding mechanism 2 winds the battery cell 1, the tabs on each electrode need to be aligned. During the winding operation, the tabs may become misaligned. To reduce the amount of misalignment, the transmission length of the first electrode 11 and the second electrode 12 needs to be adjusted according to the position of the tabs when transmitting them. Due to the change in electrode length, the length of the diaphragm 13 also needs to be adjusted. The detection unit 10 detects the position of the tabs and adjusts the transmission length of the first electrode 11 and the second electrode 12. The control unit 9 then adjusts the position of the feeding roller 81 of the feeding unit 8 according to the transmission length of the first electrode 11 and the second electrode 12, so that the length of the diaphragm on the feeding unit 8 is a predetermined length, thereby ensuring the accuracy of the film application position on the diaphragm 13.

[0151] Figure 9 This is a functional block diagram of sensor 101 detecting feed roller 81 according to a specific embodiment of this application.

[0152] like Figure 9As shown, in one specific embodiment, the detection unit 10 includes a sensor 101, which is connected to the feeding unit 8 to detect the position of multiple feeding rollers 81 and transmit the detection result to the control unit 9; the control unit 9 adjusts the length of the diaphragm 13 transmitted by the feeding unit 8 according to the detection result.

[0153] Sensor 101 detects the position of multiple feeding rollers 81. Control unit 9 calculates the length of diaphragm 13 on feeding unit 8 based on the detection results. When the length of diaphragm 13 is greater than or less than the preset length, it is determined that the length of diaphragm 13 is too long or too short, and the position of feeding roller 81 is adjusted to ensure that the length of diaphragm 13 on feeding unit 8 is equal to the preset length.

[0154] Figure 10 This is a functional block diagram of a specific embodiment of the present application showing how the control unit 9 controls the feeding unit 8 to adjust the transmission length of the diaphragm 13.

[0155] like Figure 10 As shown, in one specific embodiment, the control unit 9 includes a computer 91, a touch screen 92, and a controller 93.

[0156] In some embodiments, 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. The computer 91 calculates the predetermined length of the diaphragm 13 on the feeding unit 8 based on the material parameters and displays the real-time result on the computer 91. 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 the predetermined length.

[0157] In other embodiments, the detection unit 10 detects the positions of multiple feed rollers 81 and transmits the position information of the feed rollers 81 to the computer 91 of the control unit 9. The computer 91 calculates the length of the diaphragm 13 on the feeding unit 8 based on the position information of the feed rollers 81 and displays the real-time result on the computer 91. The computer 91 transmits the calculation result to the controller 93, and the controller 93 adjusts the position of the feed rollers 81 according to the calculation result, so that the length of the diaphragm 13 on the feeding unit 8 is a predetermined length.

[0158] The operator can also input control commands 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 feed out the diaphragm 13 of the predetermined length.

[0159] Figure 11 This is a flowchart of a battery cell manufacturing method according to an embodiment of this application.

[0160] This application also provides a method for manufacturing a battery cell 1, the battery cell 1 including a first electrode 11, a second electrode 12 and a separator 13, the method including the following steps:

[0161] Step S1: The membrane 14 is attached to a predetermined position of the first electrode 11, the second electrode 12, or the diaphragm 13 to form an enhanced membrane layer on the first electrode 11, the second electrode 12, or the diaphragm 13.

[0162] The diaphragm 14 can be attached to any one or more of the first electrode 11, the second electrode 12, and the diaphragm 13.

[0163] Step S2: The first electrode 11, the second electrode 12 and the separator 13 are wound to form the battery cell 1.

[0164] In one specific embodiment, the cell manufacturing method further includes the following steps: conveying a first electrode 11, a second electrode 12, and a separator 13 of predetermined length; each time the transmission of the first electrode 11, the second electrode 12, and the separator 13 of predetermined length is completed, attaching a membrane 14 to a predetermined position of the first electrode 11, the second electrode 12, or the separator 13 to form a plurality of reinforcing film layers spaced at a certain distance on the first electrode 11, the second electrode 12, or the separator 13.

[0165] The spacing between adjacent reinforcing film layers can be set according to the structure and stress conditions of the cell 1. For example, a section of film 14 can be attached to a predetermined position of the separator 13 so that a section of reinforcing film layer is formed in a cell 1. Alternatively, a section of film 14 can be attached to multiple predetermined positions of the separator 13 so that multiple sections of reinforcing film layer are formed in a cell 1.

[0166] In one specific embodiment, the cell manufacturing method further includes the following steps: adjusting the conveying distance of the first electrode 11, the second electrode 12, or the separator 13 to convey a predetermined length of the first electrode 11, the second electrode 12, or the separator 13.

[0167] When attaching the diaphragm 14 to the diaphragm 13, the length of the diaphragm 13 from the attaching position to the winding position is fixed. Each time a predetermined length of diaphragm 13 is transferred, the diaphragm 14 is attached at the next predetermined position of the diaphragm 13, thereby ensuring that each attaching position on the diaphragm 13 is a predetermined position and ensuring the accuracy of the attaching position.

[0168] In a specific embodiment of the battery cell manufacturing method, adjusting the conveying distance of the first electrode 11, the second electrode 12, or the separator 13 to transmit a predetermined length of the first electrode 11, the second electrode 12, or the separator 13 includes: detecting the material parameters of the first electrode 11, the second electrode 12, or the separator 13, and adjusting the conveying distance of the first electrode 11, the second electrode 12, or the separator 13 according to the material parameters to transmit the predetermined length of the first electrode 11, the second electrode 12, or the separator 13. Each time a predetermined length of the first electrode 11, the second electrode 12, or the separator 13 is transmitted, a section of film 14 is attached at the next predetermined position, thereby ensuring that each film attachment position is a predetermined position and guaranteeing the accuracy of the film attachment position. The material parameters include the thickness of the first electrode 11, the second electrode 12, or the separator 13, the position of the tabs of the first electrode 11 or the second electrode 12, and other parameters.

[0169] In some embodiments, when the first electrode 11, the second electrode 12, and the diaphragm 13 are wound, the thicknesses of the first electrode 11 and the second electrode 12 are inconsistent, resulting in a deviation in the lengths of the first electrode 11, the second electrode 12, and the diaphragm 13 required for winding. Therefore, the thicknesses of the first electrode 11, the second electrode 12, and / or the diaphragm 13 are detected, the length of the diaphragm 13 is calculated, and the length of the conveyed diaphragm 13 is adjusted to make the diaphragm length a predetermined length, thereby ensuring the accuracy of the film application position on the diaphragm 13.

[0170] In other embodiments, tabs are die-cut onto the first electrode 11 and the second electrode 12. During the winding of the battery cell 1, the tabs on each electrode need to be aligned. During the winding operation, the tabs may become misaligned. To reduce the amount of misalignment, the transmission length of the first electrode 11 and the second electrode 12 needs to be adjusted according to the position of the tabs when transmitting them. Due to the change in electrode length, the length of the separator 13 also needs to be adjusted. The tab position is detected, and the transmission length of the first electrode 11 and the second electrode 12 is adjusted. Then, based on the transmission length of the first electrode 11 and the second electrode 12, the length of the conveyed separator 13 is adjusted to a predetermined length, thereby ensuring the accuracy of the film-attached position on the separator 13.

[0171] The battery cell manufacturing apparatus 100 and method of this application, during the manufacturing of battery cell 1, can simultaneously convey the first electrode 11, the second electrode 12, and the separator 13, and simultaneously attach the membrane 14 to a predetermined position of the first electrode 11, the second electrode 12, or the separator 13, reducing the number of steps and improving the winding efficiency of battery cell 1. Furthermore, during the winding of battery cell 1, the transmission length of the first electrode 11, the second electrode 12, or the separator 13 is adjusted, thereby adjusting the predetermined position of the membrane and ensuring the accuracy of the reinforcing film position.

[0172] The battery D provided in this application has cells manufactured by the aforementioned cell manufacturing equipment 100, and reinforcing film layers are attached to at least one predetermined position of the cell electrode and separator, thereby enhancing the mechanical properties of the electrode and separator and improving the battery's service life.

[0173] The electrical device provided in this application, such as vehicle A, uses battery D to provide electrical energy. The battery cells of battery D are manufactured using the aforementioned battery cell manufacturing equipment 100. Battery D has a long service life, which extends the service life of battery D and saves costs.

[0174] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell manufacturing apparatus for manufacturing battery cells, the battery cell comprising electrodes and a separator, characterized in that, The battery cell manufacturing equipment includes: A film-applying mechanism is used to apply a film to a predetermined position on the electrode or separator before winding the electrode and the separator, so as to form a reinforcing film layer on the electrode or separator; and A winding mechanism is used to wind the diaphragm, the electrode, and the separator to form the battery cell; The predetermined position is the position where the electrode or the diaphragm bends during winding, or the predetermined position is the inner ring of the electrode or the diaphragm after winding; The cell manufacturing equipment also includes a feeding unit, which is disposed between the film-applying mechanism and the winding mechanism. The feeding unit is used to transfer the electrode sheet or the separator of a predetermined length so that the film-applying mechanism can determine the predetermined position based on the transfer of the electrode sheet or the separator of the predetermined length. The feeding unit includes multiple feeding rollers, which are spaced apart to allow the electrode sheet or the diaphragm of a predetermined length to be transferred between the multiple feeding rollers. The position of at least one of the plurality of feeding rollers is adjustable to adjust the length of the electrode or the diaphragm conveyed by the feeding unit; The cell manufacturing equipment also includes a detection unit and a control unit. The detection unit is used to detect the thickness of the electrode and the separator, and transmit the thickness of the electrode and the separator to the control unit. The control unit adjusts the position of the feeding roller according to the difference in thickness of the electrode and the separator, so as to adjust the length of the electrode or the separator transmitted by the feeding unit.

2. The cell manufacturing equipment according to claim 1, characterized in that, The detection unit includes a sensor connected to the feeding unit, which detects the position of the multiple feeding rollers and transmits the detection results to the control unit. The control unit adjusts the length of the electrode or the diaphragm transmitted by the feeding unit according to the detection results.

3. The cell manufacturing equipment according to claim 1, characterized in that, The film application mechanism includes, A diaphragm unwinding unit is used to transport the diaphragm; A cutting unit is used to cut the film when the film unwinding unit is feeding the film of a predetermined length; and The bonding unit bonds the membrane cut by the cutting unit to the predetermined position on the electrode or the diaphragm.

4. The cell manufacturing equipment according to claim 3, characterized in that, The bonding unit includes: A film suction mechanism is used to suction the cut film sheet; The pressing mechanism presses the adsorbed membrane onto the predetermined position of the electrode or the diaphragm.

5. The cell manufacturing equipment according to claim 4, characterized in that, The pressing mechanism is equipped with a heating device.

6. The cell manufacturing equipment according to claim 5, characterized in that, The pressing mechanism is a pressure roller or a pressure plate.

7. The battery cell manufacturing equipment according to any one of claims 1-6, characterized in that, The cell manufacturing equipment further includes an electrode unwinding unit, a diaphragm unwinding unit, an electrode transfer unit, and a diaphragm transfer unit. The electrode unwinding unit is used to output the electrode to the electrode transfer unit, and the diaphragm unwinding unit is used to output the diaphragm to the diaphragm transfer unit. The electrode transfer unit and the diaphragm transfer unit are respectively used to transfer the electrode and the diaphragm to the winding mechanism.

8. A method for manufacturing a battery cell using the battery cell manufacturing equipment according to any one of claims 1-7, wherein the battery cell comprises an electrode and a separator, characterized in that, Includes the following steps: The thickness of the electrode and the diaphragm is detected, and the conveying distance of the electrode or the diaphragm is adjusted according to the difference in thickness of the electrode and the diaphragm to convey the electrode or the diaphragm of a predetermined length. After each transmission of the electrode and the diaphragm of a predetermined length is completed, the membrane is attached to a predetermined position on the electrode or the diaphragm to form a reinforcing film layer on the electrode or the diaphragm. The electrode and the separator are wound together to form the battery cell.

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