A lithium battery diaphragm winding core coating device and use method thereof

Abstract

The invention relates to a lithium battery diaphragm winding core coating device and a use method thereof, and relates to the field of battery manufacturing technology. A plurality of annular knives are used to cut the advancing buffer sheet, and the whole-width cutting by machine is replaced by manual cutting one by one, thereby reducing the occurrence of defective products. After the cutting is completed, two transmission rollers in the same group are used to cooperate with a pressing plate and a lower plate to fix the plurality of buffer sheets after the cutting, thereby ensuring the subsequent qualified rate of double-sided adhesive pasting. The invention can place a cylindrical core on two U-shaped frames of a placing mechanism, and since each U-shaped frame is rotatably mounted with a group of arc-shaped supporting wheels, the core placed on the U-shaped frame can be rotated, so that the buffer sheet can be pasted on the core placed thereon conveniently. When the placing mechanism is moved into a thermoplastic machine, the rotating second synchronous belt drives the corresponding supporting wheel to rotate through a rotating gear, so that each core rotates, so that the thermoplastic film can be heated evenly during the winding process, thereby improving the winding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a lithium battery diaphragm winding core coating device and a use method thereof. Background Art

[0002] Lithium battery roll core is a structural form of lithium-ion battery, usually composed of positive electrode, negative electrode and electrolyte. The manufacturing process of the roll core generally involves coating the positive and negative electrode materials on metal foil, and then winding them together in a certain way to form a compact battery unit. In order to protect the roll core, a buffer sheet needs to be wrapped on its surface after the roll core is produced, and then a thermoplastic film is put on it. After the thermoplastic film is rolled up, it tightly wraps the battery.

[0003] In the production process of lithium battery cylindrical core rolls, the buffer sheet coating is basically done by manually cutting the buffer sheet into multiple buffer sheets, which are then pasted on the core roll, while the winding of the thermoplastic film requires the use of a hair dryer to blow the thermoplastic film tightly.

[0004] However, the above prior art has the following technical defects:

[0005] 1. Manually cut buffer sheets have different widths and poor straightness, which will cause damage to the buffer sheets and increase the risk of foreign matter. At the same time, the buffer sheets are made of flexible materials. In order to ensure the straightness of the double-sided tape, additional fixing devices are required to fix the buffer sheets before double-sided tape can be affixed, which increases the use of tooling and wastes time.

[0006] Second, manually using a hair dryer to tighten the thermoplastic film takes a lot of time and is inefficient. In the prior art, a thermoplastic machine can be used instead of a hair dryer for tightening. For example, the prior art discloses a packaging device for battery production (public announcement number: CN108860816A). However, when tightening the thermoplastic film on the core, this device can only keep the core still in the device and cannot rotate the core, which may cause uneven heating of the core, and then the tightening of each position of the thermoplastic film is different. In severe cases, it may cause tightening failure, resulting in rework and affecting production efficiency.

[0007] Therefore, based on the existing foundation, there is still room for improvement in order to overcome the above-mentioned technical defects. Summary of the invention

[0008] In order to solve the above problems, in the first aspect, the present application provides a lithium battery diaphragm winding core wrapping device and a method of using the same, which adopts the following technical solution: it includes a first workbench with an empty groove on the upper surface, a second workbench is arranged on one side of the first workbench, a thermoforming machine with a cabinet door facing the second workbench is arranged on one side of the second workbench, and a fixing mechanism is arranged on the upper side of the first workbench.

[0009] The fixing mechanism includes a box body installed on the upper side of the first workbench, the upper surface of the box body is provided with an opening, and the upper surface of the box body is provided with two strip grooves on the side of the opening, and the first C-shaped frames are slidably installed in the two strip grooves, and a lower plate is arranged between the inner side surfaces of the first C-shaped frames, and two first electric push rods are correspondingly installed on the upper side of the first C-shaped frame, and a pressure plate is commonly installed at the lower ends of the two first electric push rods.

[0010] Preferably, two second gears are arranged in the box body, a first gear with the same circle center as the second gear is installed at the side center of each second gear, a second rack meshing with the second gear is arranged on one side of each second gear, and two first racks are correspondingly installed on the inner side surface of the first U-shaped frame.

[0011] Preferably, the fixing mechanism also includes two screws rotatably installed between the inner walls of the box body, and a first motor with a driving end fixedly connected to its end is installed on one side of one screw on the side of the box body, and each of the screws is provided with a threaded seat fixedly connected to the first U-shaped frame, and a first synchronous wheel is installed on the two screws near the other end, and a first synchronous belt is commonly provided on the two first synchronous wheels.

[0012] Preferably, a slitting mechanism is provided on the upper side of the first workbench on one side of the fixing mechanism, and the slitting mechanism includes two groups of mounting plates whose lower ends are fixedly connected to the first workbench, and two transmission rollers are installed between each group of two mounting plates for corresponding rotation up and down, and a second motor is installed on the side of one of the mounting plates in each group on one side of a transmission roller, and a number of evenly distributed annular knives are installed on the side of the upper transmission roller near the fixing mechanism.

[0013] Preferably, a cutting mechanism is provided on the upper side of the box body, and the cutting mechanism includes a second C-shaped frame installed on the upper side of the box body and on one side of the first C-shaped frame, and two second electric push rods are correspondingly installed on the upper side of the second C-shaped frame, and the telescopic arms of the two second electric push rods pass through the second C-shaped frame and are jointly equipped with a cutter.

[0014] Preferably, two side panels are correspondingly installed on the upper side of the second workbench, and driving mechanisms are provided on the side surfaces of the side panels and inside the thermoplastic machine. The driving mechanism includes four groups of second synchronous wheels, two groups of the second synchronous wheels are rotatably installed on the side surfaces of the side panels, and the other two groups of the second synchronous wheels are rotatably installed on the inner wall of the thermoplastic machine, and each group of two second synchronous wheels is provided with a second synchronous belt with teeth on the outer surface.

[0015] Preferably, one side of one of the second synchronous wheels in each group is provided with a third motor whose driving end is fixedly connected to its end, two third motors corresponding to the two groups of second U-shaped frames inside the thermoplastic machine are fixedly connected to the side of the thermoplastic machine, and the other two third motors are fixedly connected to the two side plates.

[0016] Preferably, a placing mechanism is provided between the two side plates on the upper side of the second workbench, and the placing mechanism includes a base plate, and two groups of U-shaped frames are correspondingly installed on the upper surface of the base plate, and a group of arc-shaped supporting wheels are rotatably installed on the side of each of the U-shaped frames, and one end of the lowest supporting wheel of each group passes through the base plate and is installed with a rotating gear meshing with the teeth of the second synchronous belt on the same side.

[0017] Preferably, a cooling mechanism is arranged directly above the second workbench, and the cooling mechanism includes a bracket installed on the side of the thermoplastic machine and directly above the second workbench, and a plurality of evenly distributed transverse tubes are correspondingly installed on the lower side of the bracket, and a plurality of evenly distributed air nozzles all facing downward are installed on the side of each of the transverse tubes, and a blower is installed on the upper surface of the thermoplastic machine, and a multi-way pipe connected to all the transverse tubes is installed on the output end of the blower.

[0018] On the other hand, the present application also discloses a method for using a lithium battery separator winding core coating device. The method comprises the following steps:

[0019] S1, buffer sheet cutting, the buffer sheet is passed through each group of two transmission rollers in turn, and the advancing buffer sheet is cut by using multiple annular knives during the process of conveying the buffer sheet;

[0020] S2, the sheet is fixed, the pressing plate cooperates with the lower plate to clamp and fix the end of the advancing buffer sheet, and then the pressing plate and the lower plate move to cooperate with two transmission rollers to fix the buffer sheet on the box body;

[0021] S3, gluing and wrapping, affixing double-sided tape to the upper surfaces of all buffer sheets fixed on the box body and cutting them off from the buffer sheets using a cutting mechanism, and then affixing each cut buffer sheet to the lithium battery roll core;

[0022] S4, thermoplastic film rewinding, after each core wrapped with buffer sheet is covered with thermoplastic film, it is placed on two U-shaped frames again, and then the placement mechanism is sent into the thermoplastic machine to rewind the thermoplastic film on the surface of each core on the placement mechanism;

[0023] S5, cooling and shaping, removing the wound core from the thermoforming machine and cooling it, and then using a hair dryer to further blow heat and shape the gaps of the buffer sheet covering the surface of the core.

[0024] In summary, the present application includes at least one of the following lithium battery separator winding core coating device and its use method with beneficial technical effects:

[0025] 1. The present invention utilizes a plurality of annular knives to cut the advancing buffer sheet, and uses machine cutting instead of manual cutting one by one, thereby reducing the workload of the staff, reducing the occurrence of defective products, and reducing the waste of buffer sheets. At the same time, after the slitting is completed, two transmission rollers in the same group are used to cooperate with the pressure plate and the lower plate to fix the multiple buffer sheets after slitting, thereby ensuring the qualified rate of the subsequent double-sided adhesive pasting, without the need for additional fixing tooling, and the buffer sheets are fixed during the slitting process, without wasting additional time.

[0026] Second, the present invention can place a cylindrical core on two U-shaped frames of the placement mechanism. Since each U-shaped frame is rotatably mounted with a group of arc-shaped supporting wheels, the core placed on the U-shaped frame can be rotated, which is convenient for attaching a buffer sheet to the core placed thereon. At the same time, when the placement mechanism is moved into the thermoplastic machine, each rotating gear on the placement mechanism will mesh with the teeth of the second synchronous belt on the same side, and then the rotating second synchronous belt will drive the corresponding supporting wheel to rotate through the rotating gear, so that each core rotates, so that the thermoplastic film can be heated evenly during the winding process, thereby improving the winding effect and reducing rework.

[0027] 3. The present invention realizes automatic operation of cumbersome buffer sheet cutting and thermoplastic film blowing, which greatly reduces the burden on personnel and improves work efficiency and work quality. At the same time, the core is heated evenly to reduce the wrinkles and deformation of the thermoplastic film. The first U-shaped frame in the fixing mechanism moves while driving the placement mechanism to move, thereby enhancing the linkage between the fixing mechanism and the placement mechanism. There is no need to use an additional driving device to move the placement mechanism. The device has a simple structure, low manufacturing cost, and is not easy to damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a schematic diagram of the second state structure of the present invention.

[0031] Figure 3 It is a cross-sectional view of the present invention.

[0032] Figure 4 It is a partial structural schematic diagram of the present invention.

[0033] Figure 5 It is a schematic diagram of the fixing mechanism structure of the present invention.

[0034] Figure 6 It is a schematic diagram of the internal structure of the fixing mechanism of the present invention.

[0035] Figure 7 It is a schematic diagram of the internal structure of the fixing mechanism of the present invention in the second state.

[0036] Figure 8 yes Figure 7 Enlarged view of part A.

[0037] Fig. 9 It is a schematic diagram of the structure of the slitting mechanism of the present invention.

[0038] Fig.10 It is a schematic diagram of the cutting mechanism structure of the present invention.

[0039] Fig.11 It is a schematic diagram of the cooling mechanism structure of the present invention.

[0040] Fig.12 It is a schematic diagram of the placement mechanism structure of the present invention.

[0041] Fig.13 It is a schematic diagram of the driving mechanism structure of the present invention.

[0042] In the figure: 1. fixing mechanism; 101. box body; 102. strip groove; 103. screw rod; 104. first motor; 105. threaded seat; 106. first synchronous wheel; 107. first synchronous belt; 108. first U-shaped frame; 109. first electric push rod; 110. pressing plate; 111. lower plate; 112. first rack; 113. side plate; 114. first gear; 115. second gear; 116. second rack; 117. connecting frame; 118. supporting plate; 2. slitting mechanism; 201. mounting plate; 202. transmission roller; 203. second motor; 204. transmission gear; 205. annular knife; 3. cutting mechanism; 301. second U-shaped frame; 302. second electric push rod; 303. cutter; 4. placing machine Structure; 401, bottom plate; 402, U-shaped frame; 403, support wheel; 404, rotating gear; 405, pulley; 5, driving mechanism; 501, second synchronous wheel; 502, second synchronous belt; 503, third motor; 6, cooling mechanism; 601, bracket; 602, cross pipe; 603, air nozzle; 604, blower; 605, multi-way pipe; 7, first workbench; 8, second workbench; 9, thermoplastic machine; 10, wheel groove; 11, slide groove; 12, first slide bar; 13, first slider; 14, fixed frame; 15, third rack; 16, third gear; 17, fourth rack; 18, third U-shaped frame; 19, second slide bar; 20, second slider; 21, cylinder; 22, round rod; 23, limit rod; 24, side plate. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1 - Fig.13 Embodiments of the present invention are described in detail.

[0044] The embodiment of the present application discloses a lithium battery diaphragm winding core coating device and a method of using the same. The whole-width cutting is performed by machine instead of manual cutting one by one, which reduces the workload of the staff, reduces the occurrence of defective products, and reduces the waste of buffer sheets. At the same time, after the slitting is completed, two transmission rollers in the same group are used to cooperate with the pressure plate and the lower plate to fix the multiple buffer sheets after slitting, so as to ensure the qualified rate of the subsequent double-sided tape pasting. There is no need to use additional fixing tooling, and the buffer sheets are fixed during the slitting process, so there is no need to waste additional time.

[0045] Embodiment 1: Figure 1-Figure 4 As shown, it includes a first workbench 7 with an empty groove on the upper surface, a second workbench 8 is arranged on one side of the first workbench 7, a thermoforming machine 9 with a cabinet door facing the second workbench 8 is arranged on one side of the second workbench 8, and a plurality of plastic strips are arranged at the cabinet door of the thermoforming machine 9. The first workbench 7 and the second workbench 8 are used for installing and placing other mechanisms in the device. The thermoforming machine 9 is used for winding the core covered with the thermoplastic film, and the plastic strips can prevent the temperature from being lost from the cabinet door of the thermoforming machine 9.

[0046] like Figure 1-Figure 3 and Figure 5 As shown, a fixing mechanism 1 is provided on the upper side of the first workbench 7 , and the fixing mechanism 1 includes a box body 101 installed on the upper side of the first workbench 7 , and an opening is provided on the upper surface of the box body 101 , and the opening is used for the movement of the support plate 118 and the lower plate 111 .

[0047] like Figure 5-Figure 7 As shown, the upper surface of the box body 101 is provided with two strip grooves 102 corresponding to the side surfaces of the opening, and a first C-shaped frame 108 is slidably installed in the two strip grooves 102. A lower plate 111 sliding in the opening is arranged between the inner sides of the first C-shaped frame 108. The first C-shaped frame 108 sliding in the two strip grooves 102 can drive the lower plate 111 to slide in the opening.

[0048] like Figure 5-Figure 7 As shown, two first electric push rods 109 are correspondingly installed on the upper surface of the first U-shaped frame 108, and a pressure plate 110 is commonly installed at the lower ends of the two first electric push rods 109. The two first electric push rods 109 extend to drive the pressure plate 110 to move closer to the lower plate 111, so as to clamp the object between the two. Then, the first electric push rods 109 shorten to drive the pressure plate 110 to rise to release the clamping.

[0049] like Figure 5-Figure 8As shown, two side panels 113 are correspondingly installed on the inner bottom surface of the box body 101, and a second gear 115 is rotatably installed on the side surface of each side panel 113. A first gear 114 with the same center as the second gear 115 is installed at the center of the side surface, and two first racks 112 adapted to the first gear 114 are correspondingly installed on the inner side surface of the first U-shaped frame 108. The moving first rack 112 can drive the first gear 114 to rotate after meshing with it, and the rotating first gear 114 can drive the second gear 115 to rotate in the same direction.

[0050] like Figure 5-Figure 8 As shown, a support plate 118 is provided in the opening, and a connecting frame 117 fixedly connected to the support plate 118 is installed on the upper end of each second rack 116, and a second rack 116 meshing with it is provided on one side of each second gear 115. The rotating second gear 115 can drive the second rack 116 to move, and the moving second rack 116 can drive the support plate 118 to move through the connecting frame 117.

[0051] like Figure 5-Figure 8 As shown, the fixing mechanism 1 also includes two screws 103 rotatably installed between the inner walls of the box body 101, and each screw 103 is provided with a threaded seat 105 fixedly connected to the first C-shaped frame 108. The two rotating screws 103 can drive the two threaded seats 105 to move, thereby driving the first C-shaped frame 108 to move.

[0052] like Figure 5-Figure 8 As shown, a first motor 104 with a driving end fixedly connected to an end of a screw rod 103 is installed on the side of the box body 101, and a first synchronous wheel 106 is installed near the other end of each of the two screw rods 103. A first synchronous belt 107 is commonly provided on the two first synchronous wheels 106. The first motor 104 can drive the screw rod 103 connected thereto to rotate, and the rotating screw rod 103 drives the other screw rod 103 to rotate in the same direction through the first synchronous wheel 106 and the first synchronous belt 107.

[0053] In summary, when the end of the buffer sheet that continues to move forward reaches between the pressure plate 110 and the lower plate 111, the two first electric push rods 109 extend and drive the pressure plate 110 to move closer to the pressure plate 110 until the two clamp all the ends of the buffer sheets between them, and then the first motor 104 drives the screw 103 connected to its driving end to rotate, and drives another screw 103 to rotate in the same direction through the threaded seat 105 and the first synchronous wheel 106, drives the two first synchronous belts 107 to move, and then drives the pressure plate 110 and the lower plate 111 to move through the first U-shaped frame 108, and is in a forward state together with the buffer sheet, until the threaded seat 105 reaches the end of the screw 103 and stops moving, so that the cut buffer sheet can be fixed in the box On the box body 101, the first U-shaped frame 108 that moves at the same time drives the two first racks 112 to mesh with the two first gears 114 and then drive them to rotate. The rotating first gear 114 can drive the second gear 115 to rotate in the same direction. The rotating second gear 115 can drive the second rack 116 to rise. The moving second rack 116 can drive the support plate 118 to rise through the connecting frame 117 to support the buffer sheet above the box body 101, so as to facilitate the subsequent affixing of double-sided tape thereto. When the threaded seat 105 moves in the opposite direction, it drives the two first racks 112 to move in the opposite direction, drives the second rack 116 to descend, and drives the support plate 118 to descend, so as to prevent the support plate 118 from being in the opening and affecting the movement of the lower plate 111.

[0054] like Figure 1-Figure 3 and Fig. 9 As shown, a slitting mechanism 2 is provided on the upper side of the first workbench 7 on one side of the fixing mechanism 1. The slitting mechanism 2 includes two groups of mounting plates 201 whose lower ends are fixedly connected to the first workbench 7. Two driving rollers 202 are installed between each group of two mounting plates 201 for corresponding rotation up and down. The buffer sheet is passed through between each group of two driving rollers 202 in turn, and then each group of two driving rollers 202 can drive the buffer sheet forward when they rotate toward each other.

[0055] like Fig. 9 As shown, one end of each group of two driving rollers 202 passes through the mounting plate 201 and is installed with mutually meshing driving gears 204, and a second motor 203 is installed on the side of one of the mounting plates 201 in each group on one side of a driving roller 202, and the driving end of each second motor 203 is fixedly connected to the end of the alignment mounting plate 201, and a plurality of evenly distributed annular knives 205 are installed on the side of the upper driving roller 202 near the fixing mechanism 1, and each running second motor 203 can drive the driving roller 202 connected thereto to rotate, and then drive the other driving roller 202 in the same group to rotate in the opposite direction through two driving gears 204, and the annular knife 205 can be used to cut the advancing buffer sheet into multiple buffer sheets of the same width.

[0056] In summary, the buffer sheet is passed through each group of two drive rollers 202 in turn, and each running second motor 203 can drive the drive roller 202 connected to it to rotate, and then drive the other drive roller 202 in the same group to rotate in the opposite direction through two drive gears 204. The two drive rollers 202 in each group rotate towards each other, which can drive the buffer sheet forward, and the annular knife 205 can be used to cut the advancing buffer sheet into multiple buffer sheets of the same width.

[0057] like Figure 1-Figure 3 and Fig.10 As shown, a cutting mechanism 3 is provided on the upper side of the box body 101, and the cutting mechanism 3 includes a second C-shaped frame 301 installed on the upper side of the box body 101 and on one side of the first C-shaped frame 108, and two second electric push rods 302 are correspondingly installed on the upper side of the second C-shaped frame 301, and the telescopic arms of the two second electric push rods 302 pass through the second C-shaped frame 301 and are jointly installed with a cutter 303. After the buffer sheet fixed on the box body 101 is affixed with double-sided tape, the second electric push rod 302 extends to drive the cutter 303 to descend to cut all the buffer sheets and separate them from the buffer sheet.

[0058] like Figure 1-Figure 3 and Fig.13 As shown, two side plates 24 are correspondingly installed on the upper side of the second workbench 8, and a driving mechanism 5 is arranged on the side of the side plate 24 and inside the thermoplastic machine 9. The driving mechanism 5 includes four groups of second synchronous wheels 501, two groups of second synchronous wheels 501 are rotatably installed on the side of the side plate 24, and the other two groups of second synchronous wheels 501 are rotatably installed on the inner wall of the thermoplastic machine 9. Each group of two second synchronous wheels 501 is provided with a second synchronous belt 502 with teeth on the outer surface. The rotating second synchronous wheel 501 can drive the second synchronous belt 502 to rotate.

[0059] like Figure 1-Figure 3 and Fig.13 As shown, one side of each group of second synchronous wheels 501 is provided with a third motor 503 whose driving end is fixedly connected to its end, two third motors 503 corresponding to the two groups of second U-shaped frames 301 inside the thermoplastic machine 9 are fixedly connected to the side of the thermoplastic machine 9, and the other two third motors 503 are fixedly connected to the two side plates 24. The running third motor 503 can drive the second synchronous wheels 501 connected thereto to rotate.

[0060] like Figure 1-Figure 3 and Fig.12 As shown, a placement mechanism 4 is provided between the two side plates 24 on the upper side of the second workbench 8. The placement mechanism 4 includes a bottom plate 401. Two groups of U-shaped frames 402 are correspondingly mounted on the upper surface of the bottom plate 401. A winding core can be placed on each of the two aligned U-shaped frames 402.

[0061] like Fig.12As shown, a group of arc-shaped support wheels 403 are rotatably installed on the side of each U-shaped frame 402, and one end of the lowest support wheel 403 of each group passes through the bottom plate 401 and is installed with a rotating gear 404 meshing with the teeth of the second synchronous belt 502 on the same side. When the core is placed on the two U-shaped frames 402, it is supported by two groups of support wheels 403. The staff can rotate the core at will to facilitate the attachment of buffer sheets to it, and the rotating second synchronous belt 502 drives the rotating gear 404 meshing with it to rotate, thereby driving the corresponding support wheel 403 to rotate, which can drive the core to rotate.

[0062] In summary, the roll core is placed on two U-shaped frames 402 and supported by two sets of support wheels 403. The staff can rotate the roll core at will to facilitate the attachment of the buffer sheet to it. The rotating second synchronous belt 502 drives the rotating gear 404 meshing with it to rotate, thereby driving the corresponding support wheel 403 to rotate, thereby driving the roll core placed on the two sets of support wheels 403 to rotate.

[0063] like Figure 1-Figure 3 and Fig.11 As shown, a cooling mechanism 6 is arranged just above the second workbench 8. The cooling mechanism 6 includes a bracket 601 installed on the side of the thermoplastic machine 9 and just above the second workbench 8. A plurality of evenly distributed transverse tubes 602 are correspondingly installed on the lower side of the bracket 601. A plurality of evenly distributed air nozzles 603 all facing downward are installed on the side of each transverse tube 602. The air in the transverse tube 602 can be discharged by each air nozzle 603.

[0064] like Figure 1-Figure 3 and Fig.11 As shown, a blower 604 is installed on the upper surface of the thermoplastic machine 9, and a multi-way pipe 605 connected to all the transverse pipes 602 is installed at the output end of the blower 604. The running blower 604 transports air to each transverse pipe 602 through the multi-way pipe 605.

[0065] Embodiment 2: Figure 3 As shown, on the basis of the first embodiment, two cylinders 21 are correspondingly installed on the inner bottom surface of the box body 101 below the support plate 118, and a round rod 22 is slidably arranged inside each cylinder 21, and the upper end of which is fixedly connected to the support plate 118, and the lower end of each round rod 22 extends to the outside of the box body 101 and is installed with a limiting rod 23. The two cylinders 21 can support the support plate 118, and when the support plate 118 rises, the round rod 22 and the limiting rod 23 will also be driven to rise, and the support plate 118 can be limited by the limiting rod 23.

[0066] like Figure 4 and Fig.12As shown, the upper surface of the second workbench 8 and the inner bottom surface of the thermoplastic machine 9 are provided with two corresponding wheel grooves 10, and the lower surface of the bottom plate 401 is provided with two groups of pulleys 405 sliding in the two wheel grooves 10. When the bottom plate 401 moves, all the pulleys 405 can be driven to slide in the two wheel grooves 10, so as to facilitate the movement of the bottom plate 401.

[0067] like Figure 3 As shown, a slide groove 11 is opened in the center of the upper surface of the second workbench 8, and a first slide rod 12 is installed in the slide groove 11. A first slider 13 fixedly connected to the base plate 401 is slidably arranged on the first slide rod 12. The first slider 13 sliding on the first slide rod 12 can drive the base plate 401 to move.

[0068] like Figure 3 As shown, a fixing frame 14 is installed on the side of the first U-shaped frame 108, a rectangular plate is installed on the lower side of the second workbench 8, a third gear 16 is rotatably installed on the side of the rectangular plate, a third rack 15 located below the third gear 16 and meshing with it is installed on the lower side of the fixing frame 14, a fourth rack 17 located above the third gear 16 and meshing with it is installed on the lower side of the first slider 13, the moving fixing frame 14 can drive the third gear 16 meshing with it to rotate through the third rack 15, the rotating third gear 16 can drive the fourth rack 17 to move, and then drive the first slider 13 to move.

[0069] like Figure 3 As shown, two third U-shaped frames 18 are correspondingly installed on the lower sides of the second workbench 8 and the thermoforming machine 9, a second slide bar 19 is installed between the two third U-shaped frames 18, and a second slider 20 fixedly connected to the third rack 15 is slidably arranged on the second slide bar 19. The moving third rack 15 can drive the second slider 20 to slide on the second slide bar 19, thereby enhancing the stability of the third rack 15 when moving.

[0070] In summary, when the fixed frame 14 moves in the opposite direction to the thermoplastic machine 9, the moving fixed frame 14 drives the third rack 15 to move and drive the third gear 16 to rotate, and the rotating third gear 16 drives the fourth rack 17 to move in the opposite direction, and the moving fourth rack 17 moves the placement mechanism 4 in the thermoplastic machine 9 out through the first slider 13, and when the fixed frame 14 moves toward the cutting mechanism 3, it will also drive the fourth rack 17 to move in the direction of the thermoplastic machine 9, and then the moving fourth rack 17 sends the placement mechanism 4 back into the thermoplastic machine 9 through the first slider 13.

[0071] The present application also discloses a method for using a lithium battery separator winding core coating device, and the steps of the method are as follows:

[0072] S1. Buffer sheet cutting. The buffer sheet is passed through each group of two transmission rollers 202 in turn. During the process of conveying the buffer sheet, a plurality of annular knives 205 are used to cut the advancing buffer sheet. Specifically, the buffer sheet is passed between two transmission rollers 202 without annular knives 205, and then passed through another group of transmission rollers 202. Then, the two second motors 203 are driven to rotate the two transmission rollers 202 fixedly connected to their driving ends. At the same time, each rotating transmission roller 202 drives the other transmission roller 202 of the same group to reverse through the corresponding two mutually meshing transmission gears 204, so that the two transmission rollers 202 of the same group rotate towards each other to convey the buffer sheet between them. At the same time, the two transmission rollers 202 can clamp the buffer sheet between them to avoid its deviation and ensure the cutting effect. The transmission roller 202 equipped with annular knives 205 can drive each annular knife 205 to rotate when rotating to cut the passed buffer sheet, and cut it into multiple buffer sheets of the same width for subsequent lithium battery cell coating.

[0073] S2, the sheet is fixed, the pressing plate 110 cooperates with the lower plate 111 to clamp and fix the end of the advancing buffer sheet, and then the pressing plate 110 and the lower plate 111 move to cooperate with the two transmission rollers 202 to fix the buffer sheet on the box body 101. Specifically, when the end of the buffer sheet that continues to move forward reaches between the pressing plate 110 and the lower plate 111, the two first electric push rods 109 extend and drive the pressing plate 110 to move closer to the pressing plate 110 until the two clamp all the ends of the buffer sheets between them. After that, the first motor 104 drives the screw 103 connected to its driving end to rotate, and drives another screw 103 to rotate in the same direction through the threaded seat 105 and the first synchronous wheel 106, drives the two first synchronous belts 107 to move, and then drives the pressure plate 110 and the lower plate 111 to move through the first U-shaped frame 108, and is in a forward state together with the buffer sheet until the threaded seat 105 reaches the end of the screw 103 and stops moving, so that the cut buffer sheet can be fixed on the box body 101.

[0074] S3, gluing and wrapping, stick double-sided tape on the upper surface of all buffer sheets fixed on the box body 101 and use the cutting mechanism 3 to cut them from the buffer sheet, and then stick each cut buffer sheet on the lithium battery core. Specifically, the staff sticks the double-sided tape used to wrap the lithium battery core on the upper surface of each buffer sheet on the box body 101 between the lower plate 111 and the cutter 303. After sticking, the two second electric push rods 302 extend and drive the cutter 303 to descend to cut all the buffer sheets and cut them off from the buffer sheet. The staff puts multiple cores on two U-shaped frames 402 respectively, and then sticks multiple buffer sheets on the core at specified intervals to wrap the core. Since the core is placed on two U-shaped frames 402, it can be supported by multiple support wheels 403, and then the staff can rotate the core at will to facilitate sticking the buffer sheet on it.

[0075] S4, thermoplastic film winding, after each core wrapped with buffer sheet is covered with thermoplastic film, it is placed on two U-shaped frames 402 again, and then the placement mechanism 4 is sent into the thermoplastic machine 9 to wind up the thermoplastic film on the surface of each core on the placement mechanism 4. Specifically, after each core wrapped with buffer sheet is covered with thermoplastic film, it is placed on two U-shaped frames 402 again, and then the first motor 104 drives the screw 103 to rotate in the opposite direction, drives the threaded seat 105 to move in the opposite direction, drives the first U-shaped frame 108 to move toward the cutting mechanism 3, and at the same time drives the third rack 15 to move through the fixed frame 14, and the moving third rack 15 drives the fourth rack 17 to move in the opposite direction through the third gear 16, and the belt The first slider 13 is moved to slide on the first slide bar 12, and the placement mechanism 4 is sent from the chassis door of the thermoforming machine 9 into the inside of the thermoforming machine 9. At the same time, each rotating gear 404 is meshed with the second synchronous belt 502 on the same side, and the high temperature in the thermoforming machine 9 is used to reel the thermoplastic film on the surface of the core. At the same time, the two third motors 503 on the side of the thermoforming machine 9 drive the two second synchronous belts 502 to rotate, drive each meshed rotating gear 404 to rotate, and drive the corresponding supporting wheel 403 to rotate. Since each core is placed on two U-shaped frames 402, the rotating rotating gear 404 will drive the core to rotate, so that the thermoplastic film can be heated evenly during the reeling process, thereby improving the reeling effect.

[0076] S5, cooling and shaping, the wound core is removed from the thermoforming machine 9 and cooled, and then the gap of the buffer sheet coated on the surface of the core is further blown by a hair dryer for thermoforming. Specifically, the buffer sheet is further cut and fixed according to S1 and S2, and then the moving first U-shaped frame 108 drives the third rack 15 to move through the fixed frame 14, and the moving third rack 15 drives the fourth rack 17 to move in the opposite direction through the third gear 16, and the moving fourth rack 17 moves the placement mechanism 4 out of the thermoforming machine 9 and back to the second workbench 8 through the first slider 13, and each rotating gear 404 on the placement mechanism 4 is connected to the two second synchronous belts on the outside of the thermoforming machine 9. 502 engages, then the two third motors 503 on the outside drive the two second synchronous belts 502 to rotate, and then each rotating gear 404 drives the corresponding support wheel 403 to rotate, so that all the cores rotate, and the blower 604 running at the same time injects gas from the multi-way pipe 605 into each horizontal pipe 602, and finally each air nozzle 603 sprays it to the core, so as to speed up the air circulation around the core and enhance its heat dissipation. After cooling is completed, the buffer sheet will shrink after cooling, and the thermoplastic film will become slightly soft. The staff uses a hair dryer to further blow air to the gaps of the buffer sheet covering the surface of the core for thermoplasticization, and then removes all the cores to proceed to the next work.

[0077] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0078] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lithium battery diaphragm winding core wrapping device, comprising a first workbench with an empty groove on the upper surface, a second workbench is arranged on one side of the first workbench, and a thermoforming machine with a cabinet door facing the second workbench is arranged on one side of the second workbench, characterized in that: A fixing mechanism is provided on the upper side of the first workbench; The fixing mechanism comprises a box body installed on the upper side of the first workbench, the upper surface of the box body is provided with an opening, the upper surface of the box body is provided with two strip grooves on the side of the opening, a first C-shaped frame is slidably installed in the two strip grooves, a lower plate is provided between the inner side surfaces of the first C-shaped frame, two first electric push rods are correspondingly installed on the upper side of the first C-shaped frame, and a pressing plate is commonly installed at the lower ends of the two first electric push rods; The fixing mechanism also includes two screw rods rotatably mounted between the inner walls of the box body, a first motor having a driving end fixedly connected to its end is mounted on one side of one screw rod on the side of the box body, each screw rod is provided with a threaded seat fixedly connected to the first U-shaped frame, a first synchronous wheel is mounted on each screw rod near the other end, and a first synchronous belt is commonly provided on the two first synchronous wheels; A slitting mechanism is arranged on the upper side of the first workbench on one side of the fixing mechanism, and the slitting mechanism includes two groups of mounting plates whose lower ends are fixedly connected to the first workbench, and two driving rollers are installed between each group of two mounting plates for corresponding rotation up and down, and a second motor is installed on the side of one of the mounting plates in each group on one side of a driving roller, and a number of evenly distributed annular knives are installed on the side of the upper driving roller close to the fixing mechanism.

2. A lithium battery separator winding core coating device according to claim 1, characterized in that: Two second gears are arranged in the box body, and a first gear with the same circle center as the second gear is installed at the center of the side surface of each second gear, and a second rack meshing with the second gear is arranged on one side of each second gear, and two first racks are correspondingly installed on the inner side surface of the first U-shaped frame.

3. A lithium battery separator winding core coating device according to claim 2, characterized in that: A cutting mechanism is arranged on the upper side of the box body, and the cutting mechanism comprises a second C-shaped frame installed on the upper side of the box body and on one side of the first C-shaped frame. Two second electric push rods are correspondingly installed on the upper side of the second C-shaped frame. The telescopic arms of the two second electric push rods pass through the second C-shaped frame and are jointly equipped with a cutter.

4. A lithium battery separator winding core coating device according to claim 3, characterized in that: Two side panels are correspondingly installed on the upper side of the second workbench. Drive mechanisms are arranged on the side surfaces of the side panels and inside the thermoplastic machine. The drive mechanisms include four groups of second synchronous wheels, two groups of second synchronous wheels are rotatably installed on the side surfaces of the side panels, and the other two groups of second synchronous wheels are rotatably installed on the inner wall of the thermoplastic machine. Each group of two second synchronous wheels is provided with a second synchronous belt with teeth on the outer surface.

5. A lithium battery separator winding core coating device according to claim 4, characterized in that: A third motor having a driving end fixedly connected to its end is arranged on one side of one of the second synchronous wheels in each group. Two third motors corresponding to the two groups of second U-shaped frames inside the thermoplastic machine are fixedly connected to the side of the thermoplastic machine, and the other two third motors are fixedly connected to the two side plates.

6. A lithium battery separator winding core coating device according to claim 5, characterized in that: A placing mechanism is arranged on the upper side of the second workbench between the two side plates, and the placing mechanism includes a base plate, and two groups of U-shaped frames are correspondingly installed on the upper surface of the base plate. A group of arc-shaped supporting wheels are rotatably installed on the side of each U-shaped frame, and one end of the lowest supporting wheel of each group passes through the base plate and is installed with a rotating gear meshing with the teeth of the second synchronous belt on the same side.

7. A lithium battery separator winding core coating device according to claim 6, characterized in that: A cooling mechanism is arranged directly above the second workbench, and the cooling mechanism includes a bracket installed on the side of the thermoplastic machine and directly above the second workbench, a plurality of evenly distributed transverse tubes are correspondingly installed on the lower side of the bracket, a plurality of evenly distributed air nozzles all facing downward are installed on the side of each transverse tube, a blower is installed on the upper surface of the thermoplastic machine, and a multi-way pipe connected with all the transverse tubes is installed on the output end of the blower.

8. A method for using a lithium battery diaphragm winding core coating device, comprising the lithium battery diaphragm winding core coating device according to claim 7, characterized in that: The method comprises the following steps: S1, buffer sheet cutting, the buffer sheet is passed through each group of two transmission rollers in turn, and the advancing buffer sheet is cut by using multiple annular knives during the process of conveying the buffer sheet; S2, the sheet is fixed, the pressing plate cooperates with the lower plate to clamp and fix the end of the advancing buffer sheet, and then the pressing plate and the lower plate move to cooperate with two transmission rollers to fix the buffer sheet on the box body; S3, gluing and wrapping, affixing double-sided tape to the upper surfaces of all buffer sheets fixed on the box body and cutting them off from the buffer sheets using a cutting mechanism, and then affixing each cut buffer sheet to the lithium battery roll core; S4, thermoplastic film winding, each core wrapped with a buffer sheet is covered with a thermoplastic film and then placed on two U-shaped frames again, and then the placement mechanism is sent into the thermoplastic machine to wind up the thermoplastic film on the surface of each core on the placement mechanism; S5, cooling and shaping, removing the wound core from the thermoforming machine and cooling it, and then using a hair dryer to blow heat and shape the gaps between the buffer sheets covering the surface of the core.

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