A novel winding process and winding device

Abstract

The application belongs to the technical field of new energy cylindrical battery cell winding, and particularly relates to a novel winding process and winding device, and a novel winding device, which comprises a rack, and is provided with a positive plate unwinding mechanism, a negative plate unwinding mechanism, an upper diaphragm unwinding mechanism, a lower diaphragm unwinding mechanism, a center mold unwinding mechanism, a diaphragm pressing mechanism, a center diaphragm cutting mechanism, a diaphragm gluing mechanism, a winding needle, a plate cutting mechanism, a plate gluing mechanism and a traction mechanism on the rack; the center mold unwinding mechanism is used for unwinding the center diaphragm; and the positive plate unwinding mechanism is used for unwinding the positive plate. The application can effectively increase the supporting force inside the cell, reduce the abnormality of needle pulling and core pulling, effectively reduce the heat generated by the battery charge and discharge and the difficulty of gas discharge caused by the traditional center tube steel needle, increase the impregnation effect of the cell, increase the supporting effect inside the cell, reduce the internal wrinkle problem, and increase the safety of the battery.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy cylindrical battery cell winding, and particularly relates to a novel winding process and winding device. BACKGROUND

[0002] In the preparation process of the new energy cylindrical battery cell, no center tube is used, and the internal folding of the battery cell is caused in the high rate cycle process, which affects the use safety of the battery cell; and in the traditional way, a center tube is added, which is mostly made of steel, although the center tube can support the internal part of the battery cell and inhibit the internal folding of the battery cell, but in the process of battery charging and discharging, the gas and heat in the internal part of the battery cell are difficult to discharge in time, which also affects the immersion effect of the battery, affects the performance of the battery cell, and causes the battery to be unsafe. SUMMARY

[0003] The application aims to provide a novel winding process and winding device, which can effectively increase the support force in the internal part of the battery cell, reduce the abnormality of the needle pulling and core pulling, effectively reduce the difficulty in discharging the heat and gas generated by the battery charging and discharging caused by the traditional center tube inserted with a steel needle, increase the immersion effect of the battery cell, increase the support effect in the internal part of the battery cell, reduce the internal folding problem, increase the safety of the battery, and have high application value in the new energy battery industry, especially in the winding cylindrical battery direction.

[0004] The technical scheme adopted by the application is as follows:

[0005] A novel winding device comprises a rack, wherein the rack is provided with a positive electrode sheet unwinding mechanism, a negative electrode sheet unwinding mechanism, an upper separator unwinding mechanism, a lower separator unwinding mechanism, a center module unwinding mechanism, a film pressing mechanism, a center film cutting mechanism, a film piece gluing mechanism, a winding needle, an electrode sheet cutting mechanism, an electrode sheet gluing mechanism, and a traction mechanism.

[0006] The center module unwinding mechanism is used for unwinding the center film.

[0007] The positive electrode sheet unwinding mechanism is used for unwinding the positive electrode sheet.

[0008] The center module unwinding mechanism is installed between the positive electrode sheet unwinding mechanism and the negative electrode sheet unwinding mechanism, and the negative electrode sheet unwinding mechanism is used for unwinding the negative electrode sheet.

[0009] The upper separator unwinding mechanism is installed between the positive electrode sheet unwinding mechanism and the center module unwinding mechanism, and the upper separator unwinding mechanism is used for unwinding the upper separator.

[0010] The lower separator unwinding mechanism is installed at a position away from the center module unwinding mechanism relative to the negative electrode sheet unwinding mechanism, and the lower separator unwinding mechanism is used for unwinding the lower separator.

[0011] The winding needle is used for winding the center film, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet;

[0012] The film pressing mechanism is installed between the upper diaphragm unwinding mechanism, the center film unwinding mechanism and the winding needle, and is used for positioning the upper diaphragm or the center film;

[0013] The center film cutting mechanism is installed between the first film clamp and the second film clamp, and is used for cutting the upper diaphragm or the center film;

[0014] The film gluing mechanism is used for gluing the upper diaphragm or the center film;

[0015] The electrode sheet cutting mechanism is fixedly connected to the rack near the winding needle, and is used for cutting the center film, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet;

[0016] The electrode sheet gluing mechanism is fixedly connected to the rack near the winding needle, and is used for gluing the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet;

[0017] The traction mechanism is used for pulling the center film, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet to the winding needle, and pulling the center film and the upper diaphragm through the film pressing mechanism, the center film cutting mechanism and the film gluing mechanism.

[0018] Further, the center film unwinding mechanism comprises a center film unwinding shaft and a center film conveying roller installed on the rack, the center film is wound on the outside of the center film unwinding shaft, and the center film unwound from the center film unwinding shaft passes through the center film conveying roller.

[0019] Further, the positive electrode sheet unwinding mechanism comprises a positive electrode sheet unwinding shaft, a positive electrode sheet receiving platform, a positive electrode sheet reverse side defect detection mechanism, a positive electrode sheet front side defect detection mechanism, a positive electrode sheet unwinding tension roller, a gluing device and a plurality of positive electrode sheet conveying rollers installed on the rack and located on one side of the winding needle, the positive electrode sheet is wound on the positive electrode sheet unwinding shaft, the positive electrode sheet unwound from the positive electrode sheet unwinding shaft passes through the positive electrode sheet unwinding tension roller and the plurality of positive electrode sheet conveying rollers in sequence, and the positive electrode sheet unwound from the positive electrode sheet unwinding shaft passes through the positive electrode sheet receiving platform, the positive electrode sheet reverse side defect detection mechanism, the positive electrode sheet front side defect detection mechanism and the gluing device in sequence;

[0020] The negative electrode sheet unwinding mechanism comprises a negative electrode sheet unwinding shaft installed on the rack and located on the other side of the winding needle, a negative electrode sheet receiving platform, a negative electrode sheet reverse surface flaw detection mechanism, a negative electrode sheet front surface flaw detection mechanism, a negative electrode sheet unwinding tension roller and a plurality of negative electrode sheet conveying rollers, the negative electrode sheet is wound on the negative electrode sheet unwinding shaft, the negative electrode sheet unwound from the negative electrode sheet unwinding shaft passes through the negative electrode sheet unwinding tension roller and the plurality of negative electrode sheet conveying rollers in sequence, and the negative electrode sheet unwound from the negative electrode sheet unwinding shaft passes through the negative electrode sheet receiving platform, the negative electrode sheet reverse surface flaw detection mechanism and the negative electrode sheet front surface flaw detection mechanism in sequence.

[0021] The upper diaphragm unwinding mechanism comprises an upper diaphragm unwinding shaft, an upper diaphragm tension roller and a plurality of upper diaphragm conveying rollers installed on the rack, the upper diaphragm is wound on the upper diaphragm unwinding shaft, the upper diaphragm unwound from the upper diaphragm unwinding shaft passes through the upper diaphragm tension roller and the plurality of upper diaphragm conveying rollers in sequence.

[0022] The lower diaphragm unwinding mechanism comprises a lower diaphragm unwinding shaft, a lower diaphragm tension roller and a plurality of lower diaphragm conveying rollers installed on the rack, the lower diaphragm is wound on the lower diaphragm unwinding shaft, the lower diaphragm unwound from the lower diaphragm unwinding shaft passes through the lower diaphragm tension roller and the plurality of lower diaphragm conveying rollers in sequence.

[0023] Further, the film pressing mechanism comprises a first air cylinder, a first diaphragm clamp and a second diaphragm clamp, the first air cylinder is fixedly connected to the rack and located between the upper diaphragm unwinding mechanism, the center diaphragm unwinding mechanism and the winding needle, the first air cylinder is horizontally arranged, a connecting piece is fixedly connected to the piston rod of the first air cylinder, two first diaphragm clamps are fixedly connected to the connecting piece in parallel, and the second diaphragm clamp is fixedly connected to the rack and located at the position close to the winding needle of the first diaphragm clamp.

[0024] Further, the first diaphragm clamp and the second diaphragm clamp each comprise a bottom plate, the bottom plate of the first diaphragm clamp is fixedly connected to the connecting piece, the bottom plate of the second diaphragm clamp is fixedly connected to the rack, two horizontally arranged second air cylinders are fixedly connected to the first diaphragm clamp, and clamping plates are fixedly connected to the piston rods of the two second air cylinders.

[0025] Further, the center diaphragm cutting mechanism comprises two horizontally arranged third air cylinders fixedly connected to the rack, the third air cylinders are horizontally arranged, the third air cylinders are located between the first diaphragm clamp and the second diaphragm clamp, and cutting tools are fixedly connected to the piston rods of the two third air cylinders.

[0026] Further, the film patching mechanism comprises two fourth air cylinders fixed horizontally and side by side on the rack, the fourth air cylinders are vertically arranged, and the two fourth air cylinders are located on the two sides of the second film clamp respectively, the piston rods of the two fourth air cylinders are fixedly connected with mounting plates, the fifth air cylinders are fixedly connected with the mounting plates and arranged horizontally, and the piston rods of the fifth air cylinders are fixedly connected with patching units.

[0027] Further, the material of the center film is pp or pet.

[0028] A novel winding process, comprising the following steps:

[0029] S1: unwinding the center film through the center film unwinding mechanism, when the center film is unwound to a set length, starting the film pressing mechanism to position the center film;

[0030] S2: starting the center film cutting mechanism to cut the center film;

[0031] S3: starting the film pressing mechanism to press the diaphragm and the center film, and then patching high-temperature glue on both sides through the film patching mechanism, so that the end of the center film and the initial end of the upper diaphragm are bonded together;

[0032] S4: starting the winding needle to wind the center film until the center film is wound one turn to form;

[0033] S5: starting the winding needle to wind the upper diaphragm bonded with the center film until the upper diaphragm is wound 2-3 turns;

[0034] S6: starting the traction mechanism to pull the negative plate to the winding needle, and starting the winding needle to wind the negative plate 2-3 turns;

[0035] S7: starting the traction mechanism to pull the lower diaphragm to the winding needle, and starting the winding needle to wind the lower diaphragm 2-3 turns;

[0036] S8: starting the traction mechanism to pull the positive plate to the winding needle, and starting the winding needle to wind the lower positive plate;

[0037] S9: continuously winding the upper diaphragm, the positive plate, the lower diaphragm and the negative plate through the winding needle until the battery cell is wound to form;

[0038] S10: after the battery cell winding is completed, the winding needle is retreated by half a turn or one turn, which can increase the internal support force and reduce the abnormality of pulling out the needle and pulling out the core;

[0039] S11: starting the plate cutting mechanism to cut the center film, the upper diaphragm, the positive plate, the lower diaphragm and the negative plate;

[0040] S12: after winding is completed, starting the plate patching mechanism to perform one turn of glue wrapping treatment on the outside of the wound battery cell.

[0041] The technical effects achieved by the application are as follows:

[0042] The novel winding process and winding device can effectively increase the support force inside the battery cell, reduce the abnormality of needle pulling and core pulling, effectively reduce the heat generated by the battery charge and discharge and the difficulty of gas discharge caused by the traditional center tube inserted steel needle, increase the impregnation effect of the battery cell, increase the support effect inside the battery cell, reduce the internal wrinkle problem, increase the safety of the battery, and have high application value in the new energy battery industry, especially in the winding cylindrical battery direction. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a structural schematic diagram of the application;

[0044] Figure 2 is a structural schematic diagram of the positive plate unwinding mechanism of the application;

[0045] Figure 3 is a structural schematic diagram of the negative plate unwinding mechanism of the application;

[0046] Figure 4 is a partial enlarged view of the application;

[0047] Figure 5 is a partial enlarged view of A in the application Figure 4 .

[0048] In the drawings, the component list represented by each reference sign is as follows:

[0049] 100, positive plate unwinding mechanism; 101, positive plate unwinding shaft; 102, positive plate conveying roller; 103, positive plate receiving platform; 104, positive plate reverse surface defect detection mechanism; 105, positive plate front surface defect detection mechanism; 106, positive plate unwinding tension roller; 107, rubberizing equipment; 200, negative plate unwinding mechanism; 201, negative plate unwinding shaft; 202, negative plate conveying roller; 203, negative plate receiving platform; 204, negative plate reverse surface defect detection mechanism; 205, negative plate front surface defect detection mechanism; 206, negative plate unwinding tension roller; 300, upper separator membrane unwinding mechanism; 301, upper separator membrane unwinding shaft; 302, upper separator membrane tension roller; 303, upper separator membrane conveying roller; 400, lower separator membrane unwinding mechanism; 401, lower separator membrane unwinding shaft; 402, lower separator membrane tension roller; 403, lower separator membrane conveying roller; 500, center membrane unwinding mechanism; 501, center membrane unwinding shaft; 502, center membrane conveying roller; 600, membrane pressing mechanism; 601, first air cylinder; 602, first membrane clamp; 603, connecting piece; 604, base plate; 605, second air cylinder; 606, clamping plate; 607, second membrane clamp; 700, center membrane cutting mechanism; 701, third air cylinder; 702, cutting tool; 800, membrane rubberizing mechanism; 801, fourth air cylinder; 802, mounting plate; 803, fifth air cylinder; 804, rubberizing unit; 900, conveyor; 1000, blanking clamp; 1100, winding needle; 1200, plate cutting mechanism; 1300, plate rubberizing mechanism. DETAILED DESCRIPTION

[0050] In order to make the objects and advantages of the present application clearer, the present application is specifically described below in conjunction with embodiments. It should be understood that the following description is only used to describe one or several specific embodiments of the present application, and does not strictly limit the protection scope of the present application.

[0051] Embodiment 1:

[0052] As shown in Figures 1-5 , a novel winding device comprises a rack, and the rack is provided with a positive plate unwinding mechanism 100, a negative plate unwinding mechanism 200, an upper separator membrane unwinding mechanism 300, a lower separator membrane unwinding mechanism 400, a center membrane unwinding mechanism 500, a membrane pressing mechanism 600, a center membrane cutting mechanism 700, a membrane rubberizing mechanism 800, a winding needle 1100, a plate cutting mechanism 1200, a plate rubberizing mechanism 1300, and a traction mechanism;

[0053] The center membrane unwinding mechanism 500 is used for unwinding the center membrane;

[0054] As shown in Figure 1 and Figure 4As shown, the center film unwinding mechanism 500 includes a center film unwinding shaft 501 mounted on the frame and a center film conveying roller 502, the center film is wound outside the center film unwinding shaft 501, and the center film unwound by the center film unwinding shaft 501 passes through the center film conveying roller 502, and the center film can be guided through the center film conveying roller 502.

[0055] The material of the center film is not easy to be electrolyzed, and is preferably pp or pet.

[0056] The positive electrode sheet unwinding mechanism 100 is used for unwinding the positive electrode sheet.

[0057] As shown, Figures 1-2 The positive electrode sheet unwinding mechanism 100 includes a positive electrode sheet unwinding shaft 101 mounted on the frame and located on one side of the winding needle 1100, a positive electrode sheet receiving platform 103, a positive electrode sheet reverse side defect detection mechanism 104, a positive electrode sheet front side defect detection mechanism 105, a positive electrode sheet unwinding tension roller 106, a rubberizing device 107 and a plurality of positive electrode sheet conveying rollers 102, the positive electrode sheet is wound on the positive electrode sheet unwinding shaft 101, the positive electrode sheet unwound by the positive electrode sheet unwinding shaft 101 passes through the positive electrode sheet unwinding tension roller 106 and the plurality of positive electrode sheet conveying rollers 102 in turn, and the positive electrode sheet unwound by the positive electrode sheet unwinding shaft 101 passes through the positive electrode sheet receiving platform 103, the positive electrode sheet reverse side defect detection mechanism 104, the positive electrode sheet front side defect detection mechanism 105 and the rubberizing device 107 in turn, at this time, the positive and negative sides of the positive electrode sheet can be detected for defects through the positive electrode sheet reverse side defect detection mechanism 104 and the positive electrode sheet front side defect detection mechanism 105, and the positive electrode sheet can be rubberized through the rubberizing device 107.

[0058] The center film unwinding mechanism 500 is installed between the positive electrode sheet unwinding mechanism 100 and the negative electrode sheet unwinding mechanism 200, and the negative electrode sheet unwinding mechanism 200 is used for unwinding the negative electrode sheet.

[0059] As shown, Figure 1 and Figure 3 The negative electrode sheet unwinding mechanism 200 includes a negative electrode sheet unwinding shaft 201 mounted on the frame and located on the other side of the winding needle 1100, a negative electrode sheet receiving platform 203, a negative electrode sheet reverse side defect detection mechanism 204, a negative electrode sheet front side defect detection mechanism 205, a negative electrode sheet unwinding tension roller 206 and a plurality of negative electrode sheet conveying rollers 202, the negative electrode sheet is wound on the negative electrode sheet unwinding shaft 201, the negative electrode sheet unwound by the negative electrode sheet unwinding shaft 201 passes through the negative electrode sheet unwinding tension roller 206 and the plurality of negative electrode sheet conveying rollers 202 in turn, and the negative electrode sheet unwound by the negative electrode sheet unwinding shaft 201 passes through the negative electrode sheet receiving platform 203, the negative electrode sheet reverse side defect detection mechanism 204 and the negative electrode sheet front side defect detection mechanism 205 in turn, at this time, the positive and negative sides of the negative electrode sheet can be detected for defects through the negative electrode sheet reverse side defect detection mechanism 204 and the negative electrode sheet front side defect detection mechanism 205.

[0060] The upper diaphragm unwinding mechanism 300 is installed between the positive electrode sheet unwinding mechanism 100 and the center diaphragm unwinding mechanism 500, and is used to unwind the upper diaphragm.

[0061] As shown in Figure 1 and Figure 4 , the upper diaphragm unwinding mechanism 300 includes an upper diaphragm unwinding shaft 301, an upper diaphragm tension roller 302 and a plurality of upper diaphragm conveying rollers 303 installed on the rack, the upper diaphragm is wound on the upper diaphragm unwinding shaft 301, and the upper diaphragm unwound by the upper diaphragm unwinding shaft 301 passes through the upper diaphragm tension roller 302 and the plurality of upper diaphragm conveying rollers 303 in turn, the upper diaphragm can be guided through the upper diaphragm conveying rollers 303, and the upper diaphragm can be tensioned through the upper diaphragm tension roller 302.

[0062] The lower diaphragm unwinding mechanism 400 is installed at a position away from the center diaphragm unwinding mechanism 500 of the negative electrode sheet unwinding mechanism 200, and is used to unwind the lower diaphragm.

[0063] As shown in Figure 1 and Figure 4 , the lower diaphragm unwinding mechanism 400 includes a lower diaphragm unwinding shaft 401, a lower diaphragm tension roller 402 and a plurality of lower diaphragm conveying rollers 403 installed on the rack, the lower diaphragm is wound on the lower diaphragm unwinding shaft 401, and the lower diaphragm unwound by the lower diaphragm unwinding shaft 401 passes through the lower diaphragm tension roller 402 and the plurality of lower diaphragm conveying rollers 403 in turn, the lower diaphragm can be guided through the lower diaphragm conveying rollers 403, and the lower diaphragm can be tensioned through the lower diaphragm tension roller 402.

[0064] The winding needle 1100 is used to wind the center diaphragm, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet.

[0065] The film pressing mechanism 600 is installed between the upper diaphragm unwinding mechanism 300, the center diaphragm unwinding mechanism 500 and the winding needle 1100, and is used to position the upper diaphragm or the center diaphragm.

[0066] As shown in Figure 1 and Figures 4-5As shown, the film pressing mechanism 600 comprises a first air cylinder 601, a first diaphragm clamp 602 and a second diaphragm clamp 607, the first air cylinder 601 is fixedly connected to the rack and located between the upper diaphragm unwinding mechanism 300, the center film unwinding mechanism 500 and the winding needle 1100, the first air cylinder 601 is horizontally arranged, and the piston rod of the first air cylinder 601 is fixedly connected with a connecting piece 603, two first diaphragm clamps 602 are fixedly connected to the connecting piece 603 in parallel, and the second diaphragm clamp 607 is fixedly connected to the rack and located at the position close to the winding needle 1100 of the first diaphragm clamp 602. At this time, the center film and the upper diaphragm can be clamped and positioned respectively through the two connecting pieces 603, and the first diaphragm clamp 602 can be driven to move horizontally by starting the first air cylinder 601, so as to adjust the horizontal position of the center film and the upper diaphragm.

[0067] As shown in Figures 4-5 , the first diaphragm clamp 602 and the second diaphragm clamp 607 each comprise a bottom plate 604, the bottom plate 604 of the first diaphragm clamp 602 is fixedly connected to the connecting piece 603, and the bottom plate 604 of the second diaphragm clamp 607 is fixedly connected to the rack, two horizontally arranged second air cylinders 605 are fixedly connected to the first diaphragm clamp 602, and the piston rods of the two second air cylinders 605 are each fixedly connected with a clamping plate 606. At this time, the interval between the two clamping plates 606 can be adjusted by starting the second air cylinder 605, so that the two clamping plates 606 clamp the upper diaphragm or the center film.

[0068] Among them, the center film cutting mechanism 700 is installed between the first diaphragm clamp 602 and the second diaphragm clamp 607, and is used for cutting the upper diaphragm or the center film;

[0069] As shown in Figure 1 and Figures 4-5 , the center film cutting mechanism 700 comprises two horizontally arranged third air cylinders 701 fixedly connected to the rack, the third air cylinders 701 are horizontally arranged, the third air cylinders 701 are located between the first diaphragm clamp 602 and the second diaphragm clamp 607, and the piston rods of the two third air cylinders 701 are each fixedly connected with a cutting tool 702. The cutting tool 702 can be moved by starting the third air cylinder 701, so that the moving cutting tool 702 cuts the upper diaphragm or the center film.

[0070] Among them, the diaphragm gluing mechanism 800 is used for gluing the upper diaphragm or the center film;

[0071] As shown in Figure 1 and Figures 4-5As shown, the diaphragm gluing mechanism 800 includes two fourth cylinders 801 fixedly connected to the frame and arranged horizontally in parallel. The fourth cylinders 801 are vertically arranged, and the two fourth cylinders 801 are respectively located on both sides of the second diaphragm clamp 607. The piston rods of the two fourth cylinders 801 are fixedly connected to the mounting plate 802. The two mounting plates 802 are fixedly connected to the horizontally arranged fifth cylinder 803. The piston rod of the fifth cylinder 803 is fixedly connected to the gluing unit 804. At this time, starting the fourth cylinder 801 can drive the gluing unit 804 to move vertically, and starting the fifth cylinder 803 can drive the gluing unit 804 to move horizontally, thereby adjusting the position of the gluing unit 804, allowing the gluing unit 804 to contact the upper diaphragm or the center membrane for gluing.

[0072] The electrode cutting mechanism 1200 is fixedly connected to the frame near the winding needle 1100 and is used to cut the center film, upper diaphragm, positive electrode sheet, lower diaphragm and negative electrode sheet.

[0073] Among them, the electrode gluing mechanism 1300 is fixedly connected to the frame near the winding needle 1100, and is used to perform gluing processing on the upper diaphragm, positive electrode sheet, lower diaphragm and negative electrode sheet;

[0074] The traction mechanism is used to pull the center film, upper diaphragm, positive electrode sheet, lower diaphragm and negative electrode sheet to the winding needle 1100, and pull the center film and upper diaphragm through the film pressing mechanism 600, the center film cutting mechanism 700 and the film gluing mechanism 800;

[0075] Among them, the winding device also includes a conveyor 900 and a blanking clamp 1000. The conveyor 900 is provided with multiple core unloading stations. When the battery cell is wound, the battery cell can be moved to the core unloading station of the conveyor 900 through the blanking clamp 1000 for unloading.

[0076] Example 2:

[0077] like Figures 1-5 As shown, this embodiment discloses a new winding process based on embodiment 1, including the following steps:

[0078] S1: The center film is unwound through the center die unwinding mechanism 500. When the center film is unwound to a set length, the film pressing mechanism 600 is started to position the center film.

[0079] Here, the set length of the center film is greater than or equal to the length of the center film wound around the winding needle 1100.

[0080] S2: Start the center film cutting mechanism 700 to cut the center film;

[0081] S3: Start the film pressing mechanism 600 to press the diaphragm and the center film, and then paste high-temperature glue on both sides through the diaphragm gluing mechanism 800, so that the end of the center film and the initial end of the upper diaphragm are bonded together;

[0082] S4: Start the winding needle 1100 to wind the center film until the center film is wound one turn to form;

[0083] S5: Start the winding needle 1100 to wind the upper diaphragm bonded with the center film until the upper diaphragm is wound 2-3 turns;

[0084] S6: Start the traction mechanism to pull the negative plate to the winding needle 1100, and start the winding needle 1100 to wind the negative plate 2-3 turns;

[0085] S7: Start the traction mechanism to pull the lower diaphragm to the winding needle 1100, and start the winding needle 1100 to wind the lower diaphragm 2-3 turns;

[0086] S8: Start the traction mechanism to pull the positive plate to the winding needle 1100, and start the winding needle 1100 to wind the lower positive plate 2-3 turns;

[0087] S9: Continue to wind the upper diaphragm, positive plate, lower diaphragm and negative plate through the winding needle 1100 until the battery cell is wound and formed;

[0088] S10: After the battery cell winding is completed, the winding needle 1100 retreats half a turn or one turn, which can increase the internal support force and reduce the abnormality of pulling needle and core;

[0089] S11: Start the plate cutting mechanism 1200 to cut the center film, upper diaphragm, positive plate, lower diaphragm and negative plate;

[0090] S12: After winding is completed, start the plate gluing mechanism 1300 to perform one turn of glue wrapping on the outside of the wound and formed battery cell;

[0091] S13: After winding is completed, the battery cell is placed on the conveyor 900 through the discharging clamp 1000 for discharging.

[0092] Here, the initial end of the center film, the upper diaphragm, the positive plate, the lower diaphragm and the negative plate is the end of the center film and the upper diaphragm first contacted with the winding needle 1100.

[0093] The technical scheme of the embodiment can effectively increase the supporting force inside the battery cell, reduce the needle pulling and core pulling abnormality, effectively reduce the heat generated by the battery charge and discharge and the difficult gas discharge caused by the traditional center tube inserted steel needle, increase the infiltration effect of the battery cell, increase the supporting effect inside the battery cell, reduce the internal wrinkle problem, increase the battery safety, and have high application value in the new energy battery industry, especially in the winding cylindrical battery direction.

[0094] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A new winding device, characterized in that: The machine comprises a frame on which are mounted a positive electrode sheet unwinding mechanism (100), a negative electrode sheet unwinding mechanism (200), an upper diaphragm unwinding mechanism (300), a lower diaphragm unwinding mechanism (400), a central mold unwinding mechanism (500), a film pressing mechanism (600), a central film cutting mechanism (700), a film sheet gluing mechanism (800), a winding needle (1100), a pole sheet cutting mechanism (1200), a pole sheet gluing mechanism (1300), and a traction mechanism; The central mold unwinding mechanism (500) is used to unwind the central film; The positive electrode sheet unwinding mechanism (100) is used to unwind the positive electrode sheet; The central die unwinding mechanism (500) is installed between the positive electrode sheet unwinding mechanism (100) and the negative electrode sheet unwinding mechanism (200), and the negative electrode sheet unwinding mechanism (200) is used to unwind the negative electrode sheet; The upper diaphragm unwinding mechanism (300) is installed between the positive electrode sheet unwinding mechanism (100) and the center mold unwinding mechanism (500), and the upper diaphragm unwinding mechanism (300) is used to unwind the upper diaphragm; The lower diaphragm unwinding mechanism (400) is installed at a position of the negative electrode sheet unwinding mechanism (200) away from the central mold unwinding mechanism (500), and the lower diaphragm unwinding mechanism (400) is used to unwind the lower diaphragm; The winding needle (1100) is used to wind the central film, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet; The film pressing mechanism (600) is installed between the upper diaphragm unwinding mechanism (300), the center mold unwinding mechanism (500) and the winding needle (1100) and is used to position the upper diaphragm or the center film; The film pressing mechanism (600) includes a first cylinder (601), a first diaphragm clamp (602) and a second diaphragm clamp (607), wherein the first cylinder (601) is fixedly connected to the frame and is located between the upper diaphragm unwinding mechanism (300), the center mold unwinding mechanism (500) and the winding needle (1100), the first cylinder (601) is horizontally arranged, and the piston rod of the first cylinder (601) is fixedly connected to a connecting piece (603), two first diaphragm clamps (602) are fixedly connected to the connecting piece (603) in parallel, and the second diaphragm clamp (607) is fixedly connected to the frame and is located at a position of the first diaphragm clamp (602) close to the winding needle (1100); The first diaphragm clamp (602) and the second diaphragm clamp (607) both include a base plate (604), the base plate (604) of the first diaphragm clamp (602) is fixedly connected to the connecting member (603), the base plate (604) of the second diaphragm clamp (607) is fixedly connected to the frame, the first diaphragm clamp (602) is fixedly connected to two horizontally parallel second cylinders (605), and the piston rods of the two second cylinders (605) are fixedly connected to a clamping plate (606); The central membrane cutting mechanism (700) is installed between the first membrane clamp (602) and the second membrane clamp (607) and is used to cut the upper membrane or the central membrane; The diaphragm gluing mechanism (800) is used to perform gluing processing on the upper diaphragm or the center membrane; The electrode cutting mechanism (1200) is fixedly connected to the frame at a position close to the winding needle (1100) and is used to cut the center film, the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet; The electrode gluing mechanism (1300) is fixedly connected to a position on the frame close to the winding needle (1100) and is used to perform gluing processing on the upper diaphragm, the positive electrode sheet, the lower diaphragm and the negative electrode sheet; The traction mechanism is used to pull the central film, upper diaphragm, positive electrode sheet, lower diaphragm and negative electrode sheet to the winding needle (1100), and to pull the central film and upper diaphragm through the film pressing mechanism (600), the central film cutting mechanism (700) and the film gluing mechanism (800).

2. A novel winding device according to claim 1, characterized in that: The center film unwinding mechanism (500) comprises a center film unwinding shaft (501) and a center film conveying roller (502) mounted on a frame, wherein the center film is wound around the outside of the center film unwinding shaft (501), and the center film unwound by the center film unwinding shaft (501) passes around the center film conveying roller (502).

3. A novel winding device according to claim 1, characterized in that: The positive electrode sheet unwinding mechanism (100) comprises a positive electrode sheet unwinding shaft (101) installed on a frame and located on one side of a winding needle (1100), a positive electrode sheet splicing platform (103), a positive electrode sheet back surface defect detection mechanism (104), a positive electrode sheet front surface defect detection mechanism (105), a positive electrode sheet unwinding tension roller (106), a glue laminating device (107) and a plurality of positive electrode sheet conveying rollers (102); the positive electrode sheet is wound on the positive electrode sheet unwinding shaft (101); the positive electrode sheet unwinded by the positive electrode sheet unwinding shaft (101) sequentially passes around the positive electrode sheet unwinding tension roller (106) and the plurality of positive electrode sheet conveying rollers (102); and the positive electrode sheet unwinded by the positive electrode sheet unwinding shaft (101) sequentially passes through the positive electrode sheet splicing platform (103), the positive electrode sheet back surface defect detection mechanism (104), the positive electrode sheet front surface defect detection mechanism (105) and the glue laminating device (107); The negative electrode sheet unwinding mechanism (200) comprises a negative electrode sheet unwinding shaft (201) mounted on a frame and located on the other side of the winding needle (1100), a negative electrode sheet splicing platform (203), a negative electrode sheet back surface defect detection mechanism (204), a negative electrode sheet front surface defect detection mechanism (205), a negative electrode sheet unwinding tension roller (206), and a plurality of negative electrode sheet conveying rollers (202); the negative electrode sheet is wound on the negative electrode sheet unwinding shaft (201); the negative electrode sheet unwinded by the negative electrode sheet unwinding shaft (201) sequentially passes around the negative electrode sheet unwinding tension roller (206) and the plurality of negative electrode sheet conveying rollers (202); and the negative electrode sheet unwinded by the negative electrode sheet unwinding shaft (201) sequentially passes through the negative electrode sheet splicing platform (203), the negative electrode sheet back surface defect detection mechanism (204), and the negative electrode sheet front surface defect detection mechanism (205); The upper diaphragm unwinding mechanism (300) comprises an upper diaphragm unwinding shaft (301), an upper diaphragm tension roller (302), and a plurality of upper diaphragm conveying rollers (303) mounted on a frame; the upper diaphragm is wound on the upper diaphragm unwinding shaft (301); the upper diaphragm unwinded by the upper diaphragm unwinding shaft (301) sequentially passes around the upper diaphragm tension roller (302) and the plurality of upper diaphragm conveying rollers (303); The lower diaphragm unwinding mechanism (400) comprises a lower diaphragm unwinding shaft (401), a lower diaphragm tension roller (402), and a plurality of lower diaphragm conveying rollers (403) mounted on a frame; the lower diaphragm is wound on the lower diaphragm unwinding shaft (401); the lower diaphragm unwound by the lower diaphragm unwinding shaft (401) passes around the lower diaphragm tension roller (402) and the plurality of lower diaphragm conveying rollers (403) in sequence.

4. A novel winding device according to claim 1, characterized in that: The central film cutting mechanism (700) comprises two third cylinders (701) fixedly connected to the frame and arranged horizontally in parallel. The third cylinders (701) are arranged horizontally and are located between the first diaphragm clamp (602) and the second diaphragm clamp (607). The piston rods of the two third cylinders (701) are fixedly connected to the cutting tools (702).

5. A novel winding device according to claim 1, characterized in that: The diaphragm gluing mechanism (800) includes two fourth cylinders (801) fixedly connected to the frame and arranged horizontally in parallel. The fourth cylinders (801) are vertically arranged, and the two fourth cylinders (801) are respectively located on both sides of the second diaphragm clamp (607). The piston rods of the two fourth cylinders (801) are fixedly connected to the mounting plate (802), and the two mounting plates (802) are fixedly connected to the horizontally arranged fifth cylinder (803), and the piston rod of the fifth cylinder (803) is fixedly connected to the gluing unit (804).

6. A novel winding device according to claim 1, characterized in that: The material of the central film is PP or PET.

7. A novel winding process, using a novel winding device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: unwinding the center film through the center mold unwinding mechanism (500), and when the center film is unwound to a set length, starting the film pressing mechanism (600) to position the center film; S2: starting the center film cutting mechanism (700) to cut the center film; S3: Start the film pressing mechanism (600) to press the diaphragm and the center film, and then use the diaphragm gluing mechanism (800) to apply high-temperature glue on both sides, so that the end of the center film and the initial end of the upper diaphragm are bonded together; S4: Start the winding needle (1100) to wind the center film until the center film is wound into a circle; S5: Start the winding needle (1100) to wind the upper diaphragm bonded to the center membrane until the upper diaphragm is wound 2-3 times; S6: Start the traction mechanism to pull the negative electrode sheet to the winding needle (1100), and start the winding needle (1100) to wind the negative electrode sheet 2-3 times; S7: Start the traction mechanism to pull the lower diaphragm to the winding needle (1100), and start the winding needle (1100) to wind the lower diaphragm 2-3 times; S8: Start the traction mechanism to pull the positive electrode sheet to the winding needle (1100), and start the winding needle (1100) to wind the positive electrode sheet; S9: Continue to wind the upper diaphragm, the positive electrode sheet, the lower diaphragm, and the negative electrode sheet through the winding needle (1100) until the battery cell is wound into shape; S10: After the battery cell is wound, the winding needle (1100) moves back half a circle or one circle; S11: starting the electrode cutting mechanism (1200) to cut the center film, the upper diaphragm, the positive electrode, the lower diaphragm and the negative electrode; S12: After the winding is completed, the electrode gluing mechanism (1300) is started to perform a circle of glue wrapping on the outer side of the wound battery cell.

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