Simplified pole core production system

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a simplified pole core production system which comprises a mixing device, a coating device and a winding device, the coating device comprises positive pole coating equipment and negative pole coating equipment, and the mixing device supplies materials to the positive pole coating equipment to produce positive pole pieces and supplies materials to the negative pole coating equipment to produce negative pole pieces; and the winding device is used for receiving the positive pole piece and the negative pole piece, and winding the positive pole piece, the negative pole piece and the diaphragm to prepare a pole core. The material mixing device, the coating device and the winding device are matched, the positive pole piece and the negative pole piece produced by the material mixing device and the coating device are directly conveyed into the winding device to be wound with the diaphragm to obtain the pole core, compared with the prior art, a winding and unwinding mechanism can be omitted, repeated winding and unwinding are not needed, production is continuously carried out from feeding, and the production efficiency is improved. And the positive and negative pole pieces are produced in the same area, so that the product consistency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, and in particular to an extremely simplified pole core production system. Background Art

[0002] Today's new energy industry is becoming increasingly mature. In the fierce market competition environment, it is necessary to innovate the traditional production system and move towards the goal of building a high-capacity, low-cost, and low-defect unmanned battery production line.

[0003] Traditional battery production methods occupy a very large area and consume a lot of energy. They require the addition of a solvent recovery system to remove harmful solvent vapors. The various processes are scattered, lacking unified planning and production consistency. These factors will ultimately lead to increased production costs. Utility Model Content

[0004] (I) The problem to be solved by the present invention is that the existing battery production method occupies a large area, consumes a lot of energy, pollutes the environment, and has a high production cost.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a simplified pole core production system, including: a mixing device, a coating device and a winding device;

[0007] The coating device includes a positive electrode coating device and a negative electrode coating device, and the mixing device supplies materials to the positive electrode coating device to produce positive electrode sheets, and supplies materials to the negative electrode coating device to produce negative electrode sheets;

[0008] The winding device is used to receive the positive electrode sheet and the negative electrode sheet, and wind the positive electrode sheet, the negative electrode sheet and the separator to form a pole core.

[0009] Furthermore, the mixing device includes positive electrode dispersing equipment, positive electrode feeding equipment, negative electrode dispersing equipment and negative electrode feeding equipment;

[0010] The positive electrode dispersing device is used to disperse the raw materials of the positive electrode powder coating layer of the positive electrode plate, the positive electrode feeding device is arranged at the discharge end of the positive electrode dispersing device, and is used to screen and distribute the incoming materials of the positive electrode dispersing device, and the feed end of the positive electrode coating device is connected to the discharge end of the positive electrode feeding device;

[0011] The negative electrode dispersing equipment is used to disperse the raw materials of the negative electrode powder coating layer of the negative electrode plate. The negative electrode feeding equipment is arranged at the discharge end of the negative electrode dispersing equipment and is used to screen and distribute the incoming materials of the negative electrode dispersing equipment. The discharge end of the negative electrode coating equipment is connected to the discharge end of the negative electrode feeding equipment.

[0012] Further, the positive electrode coating device includes a positive electrode pressing mechanism and a positive electrode compounding mechanism, and the negative electrode coating device includes a negative electrode pressing mechanism and a negative electrode compounding mechanism;

[0013] The positive electrode pressing mechanism is used to press the materials from the mixing device into a positive electrode powder coating layer, and the positive electrode compounding mechanism is used to compound the positive electrode current collector and the positive electrode powder coating layer into the positive electrode sheet;

[0014] The negative electrode pressing mechanism is used to press the materials from the mixing device into a negative electrode powder coating layer, and the negative electrode compounding mechanism is used to compound the negative electrode current collector and the negative electrode powder coating layer into the negative electrode plate.

[0015] Furthermore, it also includes a positive electrode die-cutting device and a negative electrode die-cutting device;

[0016] The positive electrode die-cutting device is disposed between the positive electrode coating device and the winding device, and is used for cutting the positive electrode sheet and conveying the cut positive electrode sheet to the winding device;

[0017] The negative electrode die-cutting device is arranged between the negative electrode coating equipment and the winding device, and is used for cutting the negative electrode sheet and conveying the cut negative electrode sheet to the winding device.

[0018] Furthermore, the positive electrode die-cutting device and the negative electrode die-cutting device are stacked up and down, and an intermediate partition is provided between the positive electrode die-cutting device and the negative electrode die-cutting device.

[0019] Furthermore, it also includes a positive electrode cutting device and the negative electrode cutting device;

[0020] The positive electrode slitting device is disposed between the positive electrode die-cutting device and the winding device, and is used to cut the positive electrode sheet from the positive electrode die-cutting device and transport the cut positive electrode sheet to the winding device;

[0021] The negative electrode slitting device is arranged between the negative electrode die-cutting device and the winding device, and is used for cutting the negative electrode sheets from the negative electrode die-cutting device and conveying the cut negative electrode sheets to the winding device.

[0022] Furthermore, the positive electrode cutting device and the negative electrode cutting device are stacked up and down, and an intermediate partition is provided between the positive electrode cutting device and the negative electrode cutting device.

[0023] Furthermore, a positive electrode deviation correction mechanism and a positive electrode buffer mechanism are provided between the positive electrode coating device and the positive electrode die-cutting device, and / or a positive electrode deviation correction mechanism and a positive electrode buffer mechanism are provided between the positive electrode slitting device and the winding device;

[0024] The positive electrode deviation correction mechanism is used for correcting the deviation of the positive electrode sheet, and the positive electrode buffer mechanism is used for controlling the tension of the positive electrode sheet;

[0025] A negative electrode deviation correction mechanism and a negative electrode buffer mechanism are provided between the negative electrode coating device and the negative electrode die-cutting device, and / or a negative electrode deviation correction mechanism and a negative electrode buffer mechanism are provided between the negative electrode slitting device and the winding device;

[0026] The negative electrode deviation correction mechanism is used for correcting the deviation of the negative electrode sheet, and the negative electrode buffer mechanism is used for controlling the tension of the negative electrode sheet.

[0027] Furthermore, it also includes a monitoring mechanism, which is used to monitor the tension information of the positive electrode sheet and the tension information of the negative electrode sheet, and feed back the monitoring information to the positive electrode cache mechanism and the negative electrode cache mechanism, the positive electrode cache mechanism controls the tension of the positive electrode sheet according to the information fed back by the monitoring mechanism, and the negative electrode cache mechanism controls the tension of the negative electrode sheet according to the information fed back by the monitoring mechanism.

[0028] Furthermore, it also includes a driving mechanism, which is used to drive the positive electrode plate and the negative electrode plate to move.

[0029] Beneficial effects of the utility model:

[0030] The utility model provides an extremely simplified electrode core production system, comprising: a mixing device, a coating device and a winding device; the coating device comprises a positive electrode coating device and a negative electrode coating device, the mixing device supplies the positive electrode coating device to produce positive electrode sheets, and supplies the negative electrode coating device to produce negative electrode sheets; the winding device is used to receive the positive electrode sheets and the negative electrode sheets, and wind the positive electrode sheets and the negative electrode sheets with a diaphragm to form an electrode core.

[0031] Through the cooperation of the mixing device, the coating device and the winding device, the positive electrode sheets and the negative electrode sheets produced by the mixing device and the coating device are directly transported to the winding device and wound with the diaphragm to obtain the electrode core. Compared with the prior art, the reeling and unreeling mechanism can be eliminated, and there is no need to repeatedly reel and unreel. From the start of material feeding, the production is carried out continuously. A number of rollers are arranged between the devices to drive the electrode sheets to move until the electrode core is produced. In addition, the positive and negative electrode sheets are produced in the same area, which can effectively improve product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A structural schematic diagram of a simplified pole core production system provided by an embodiment of the utility model;

[0034] Figure 2 It is a schematic diagram of the structure of the mixing device and the coating device;

[0035] Figure 3 It is a schematic diagram of the structure of the positive electrode die-cutting device, the positive electrode slitting device, the negative electrode die-cutting device and the negative electrode slitting device;

[0036] Figure 4 It is a schematic diagram of the structure of the winding device part.

[0037] Icons: 1-mixing device; 11-positive electrode dispersing equipment; 12-positive electrode feeding equipment; 13-negative electrode dispersing equipment; 14-negative electrode feeding equipment;

[0038] 2-coating device; 21-positive electrode coating equipment; 211-positive electrode pressing mechanism; 212-positive electrode compounding mechanism; 22-negative electrode coating equipment; 221-negative electrode pressing mechanism; 222-negative electrode compounding mechanism; 231-differential roller; 232-thinning roller; 233-thermal compounding roller;

[0039] 3- Winding device;

[0040] 41 - positive electrode die-cutting device; 42 - negative electrode die-cutting device;

[0041] 51 - positive electrode cutting device; 52 - negative electrode cutting device;

[0042] 61 - middle partition;

[0043] 71 - positive electrode current collector; 72 - positive electrode powder coating layer; 73 - positive electrode plate; 74 - negative electrode current collector; 75 - negative electrode powder coating layer; 76 - negative electrode plate; 77 - separator;

[0044] 81 - positive electrode buffer mechanism; 82 - negative electrode buffer mechanism; 83 - positive electrode deviation correction mechanism; 84 - negative electrode deviation correction mechanism. DETAILED DESCRIPTION

[0045] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figures 1 to 4 As shown, an embodiment of the utility model provides a simplified electrode core production system, comprising: a mixing device 1, a coating device 2 and a winding device 3; the coating device 2 comprises a positive electrode coating device 21 and a negative electrode coating device 22, the mixing device 1 supplies the positive electrode coating device 21 to produce a positive electrode sheet 73, and supplies the negative electrode coating device 22 to produce a negative electrode sheet 76; the winding device 3 is used to receive the positive electrode sheet 73 and the negative electrode sheet 76, and wind the positive electrode sheet 73 and the negative electrode sheet 76 with the diaphragm 77 to form a electrode core.

[0047] The extremely simplified pole core production system provided in this embodiment is used to produce positive pole pieces 73 and negative pole pieces 76, and the positive pole pieces 73 and negative pole pieces 76 are wound with separators 77 to form pole cores. Among them, the positive pole piece 73 includes a positive current collector 71 and a positive electrode powder coating layer 72 on both sides of the positive current collector 71, and the negative pole piece 76 includes a negative current collector 74 and a negative electrode powder coating layer 75 on both sides of the negative current collector 74. The raw materials of the positive electrode powder coating layer 72 and the negative electrode powder coating layer 75 are composed of active material powder, conductive agent, binder and other additives. In this embodiment, the above-mentioned extremely simplified pole core production includes a mixing device 1, a coating device 2 and a winding device 3. Among them, the mixing device 1 is used to disperse the raw materials of the positive electrode powder coating layer 72 and the negative electrode powder coating layer 75. The coating device 2 includes a positive electrode coating device 21 for producing a positive electrode sheet 73 and a negative electrode coating device 22 for producing a negative electrode sheet 76. The mixing device 1 conveys the raw materials to the positive electrode coating device 21 and the negative electrode coating device 22. The positive electrode coating device 21 produces a positive electrode powder coating layer 72, and the positive electrode powder coating layer 72 is compounded with the positive electrode collector 71 to produce a positive electrode sheet 73. The negative electrode coating device 22 produces a negative electrode powder coating layer 75, and the negative electrode powder coating layer 75 is compounded with the negative electrode collector 74 to produce a negative electrode sheet 76. The positive electrode sheet 73 and the negative electrode sheet 76 produced by the coating device 2 are conveyed to the winding device 3. The winding device 3 receives the positive electrode sheet 73 and the negative electrode sheet 76, and winds the negative electrode sheet 76 and the negative electrode sheet 76 with the separator 77 to form a pole core.

[0048] The extremely simplified pole core production system provided in this embodiment cooperates with the mixing device 1, the coating device 2 and the winding device 3. The positive pole piece 73 and the negative pole piece 76 produced by the mixing device 1 and the coating device 2 are directly conveyed to the winding device 3 and wound with the diaphragm 77 to obtain the pole core. Compared with the prior art, the winding and unwinding mechanism can be eliminated, and there is no need to repeatedly wind and unwind. From the start of feeding, production is carried out continuously. A number of rollers are set between the devices to drive the pole piece to move until the pole core is produced, and the positive and negative pole pieces 76 are concentrated in the same area for production, which can effectively improve product consistency.

[0049] Optionally, in this embodiment, the coating device 2 is provided with a roll for storing the positive electrode current collector 71 and a roll for storing the negative electrode current collector 74 , and the winding device 3 is provided with a roll for storing the separator 77 .

[0050] The present invention provides a simplified core production system. Figure 1 and Figure 2 As shown, the mixing device 1 includes a positive electrode dispersing device 11, a positive electrode feeding device 12, a negative electrode dispersing device 13 and a negative electrode feeding device 14; the positive electrode dispersing device 11 is used to disperse the raw materials of the positive electrode powder coating layer 72 of the positive electrode plate 73, the positive electrode feeding device 12 is arranged at the discharge end of the positive electrode dispersing device 11, and is used to screen and distribute the incoming materials of the positive electrode dispersing device 11, and the feeding end of the positive electrode coating device 21 is connected to the discharge end of the positive electrode feeding device 12; the negative electrode dispersing device 13 is used to disperse the raw materials of the negative electrode powder coating layer 75 of the negative electrode plate 76, the negative electrode feeding device 14 is arranged at the discharge end of the negative electrode dispersing device 13, and is used to screen and distribute the incoming materials of the negative electrode dispersing device 13, and the discharge end of the negative electrode coating device 22 is connected to the discharge end of the negative electrode feeding device 14.

[0051] In the extremely simplified electrode core production system provided in this embodiment, the production of the positive electrode sheet 73 and the negative electrode sheet 76 adopts dry coating. The above-mentioned mixing device 1 includes a positive electrode dispersing device 11, a positive electrode feeding device 12, a negative electrode dispersing device 13 and a negative electrode feeding device 14. The mixing device 1 is provided with a conveying pipeline for the raw materials of the positive electrode powder coating layer 72 and a conveying pipeline for the raw materials of the negative electrode powder coating layer 75. The raw materials of the positive electrode powder coating layer 72 are conveyed to the positive electrode dispersing device 11 for dispersion, and the raw materials of the negative electrode powder coating layer 75 are conveyed to the negative electrode dispersing device 13 for dispersion, thereby improving the qualified rate of the electrode sheet, improving the battery performance, extending the service life of the subsequent battery and reducing the production cost. The structure of the positive electrode dispersing device 11 and the negative electrode dispersing device 13 is a well-known technology in the art, so its specific structure is not repeated here. Furthermore, the discharge end of the positive electrode dispersing device 11 is connected to the feed end of the positive electrode feeding device 12, and the discharge end of the negative electrode dispersing device 13 is connected to the feed end of the negative electrode feeding device 14. The raw material of the positive electrode powder coating layer 72 is dispersed by the positive electrode dispersing device 11 and then transported to the positive electrode feeding device 12. The positive electrode feeding device 12 is used to screen and distribute the raw material of the positive electrode powder coating layer 72 discharged by the positive electrode dispersing device 11; the raw material of the negative electrode powder coating layer 75 is dispersed by the negative electrode dispersing device 13 and then transported to the negative electrode feeding device 14. The negative electrode feeding device 14 is used to screen and distribute the raw material of the negative electrode powder coating layer 75 discharged by the negative electrode dispersing device 13, thereby increasing the qualified rate of the electrode sheet and improving the battery performance. The structures of the positive electrode feeding device 12 and the negative electrode feeding device 14 are well-known technologies in the art, so they are not described here. Among them, the purpose of the above-mentioned screening is to remove particulate matter in the incoming material to avoid affecting the quality of the prepared powder coating layer; and the cloth can evenly distribute the incoming material and shape the screened incoming material, thereby facilitating the molding of the diaphragm and improving the quality of the prepared powder coating layer.

[0052] The present invention provides a simplified core production system. Figure 1 and Figure 2 As shown, the positive electrode coating device 21 includes a positive electrode pressing mechanism 211 and a positive electrode compounding mechanism 212, and the negative electrode coating device 22 includes a negative electrode pressing mechanism 221 and a negative electrode compounding mechanism 222; the positive electrode pressing mechanism 211 is used to press the incoming materials of the mixing device 1 into a positive electrode powder coating layer 72, and the positive electrode compounding mechanism 212 is used to compound the positive electrode collector 71 and the positive electrode powder coating layer 72 to form a positive electrode sheet 73; the negative electrode pressing mechanism 221 is used to press the incoming materials of the mixing device 1 into a negative electrode powder coating layer 75, and the negative electrode compounding mechanism 222 is used to compound the negative electrode collector 74 and the negative electrode powder coating layer 75 to form a negative electrode sheet 76.

[0053] In this embodiment, the positive electrode coating device 21 includes a positive electrode pressing mechanism 211 and a positive electrode compounding mechanism 212, and the negative electrode coating device 22 includes a negative electrode pressing mechanism 221 and a negative electrode compounding mechanism 222. Among them, the feeding end of the positive electrode pressing mechanism 211 is connected with the discharging end of the positive electrode feeding device 12, and the positive electrode powder coating layer 72 discharged by the positive electrode feeding device 12 is transported to the positive electrode pressing mechanism 211, and processed by the positive electrode pressing mechanism 211 to form the positive electrode powder coating layer 72. The feeding end of the negative electrode pressing mechanism 221 is connected with the discharging end of the negative electrode feeding device 14, and the negative electrode powder coating layer 75 discharged by the negative electrode feeding device 14 is transported to the negative electrode pressing mechanism 221, and processed by the negative electrode pressing mechanism 221 to form the negative electrode powder coating layer 75. The positive electrode composite structure 212 is used to receive the positive electrode powder coating layer 72, and the positive electrode composite structure 212 is used to composite the positive electrode powder coating layer 72 with the positive electrode collector 71 to form a positive electrode plate 73; the negative electrode composite structure 222 is used to receive the negative electrode powder coating layer 75, and the negative electrode composite structure 222 is used to composite the negative electrode powder coating layer 75 with the negative electrode collector 74 to form a negative electrode plate 76.

[0054] Furthermore, in this embodiment, the positive electrode pressing mechanism 211 and the negative electrode pressing mechanism 221 have the same structure, both of which include a plurality of differential rollers 231 and a thinning roller 232 that are sequentially arranged at intervals, and the adjacent differential rollers 231 and the thinning roller 232 are arranged at intervals, and the gaps are gradually reduced. The differential roller 231 is used to press the raw materials of the positive electrode powder coating layer 72 and the negative electrode powder coating layer 75 to form a film, and the thinning roller 232 is used to control the thickness of the obtained positive electrode powder coating layer 72 and the negative electrode powder coating layer 75, and the positive electrode powder coating layer 72 and the negative electrode powder coating layer 75 are obtained by the cooperation of the plurality of differential rollers 231 and the thinning roller 232. In addition, the rotation speed of the differential roller 231 increases successively from the direction away from the thinning roller 232 to the direction close to the thinning roller 232, so that the membrane can enter the next differential roller 231 from the previous differential roller 231, and the feeding end of the mechanism is formed between the two differential rollers 231 farthest from the thinning roller 232.

[0055] Furthermore, in the present embodiment, the structures of the positive electrode pressing mechanism 211 and the negative electrode pressing mechanism 221 are the same, and both are composed of two hot composite rollers 233. A heating structure is arranged in the hot composite roller 233. The heating structure can be electrically heated by arranging an electric heating wire, or water heated by arranging a hot water flow channel. Through the cooperation of the two hot composite rollers 233, the positive electrode powder coating layer 72 can be compounded with the positive electrode collector 71 to form a positive electrode sheet 73, and the negative electrode powder coating layer 75 can be compounded with the negative electrode collector 74 to form a negative electrode sheet 76.

[0056] In this embodiment, positive electrode powder coating layers 72 are provided on both sides of the positive electrode current collector 71, and negative electrode powder coating layers 75 are provided on both sides of the negative electrode current collector 74. Preferably, two sets of positive electrode dispersion equipment 11, positive electrode feeding equipment 12, negative electrode dispersion equipment 13 and negative electrode feeding equipment 14 are each provided, and two sets of positive electrode pressing mechanism 211 and negative electrode pressing mechanism 221 are also provided.

[0057] It can be understood that in this embodiment, the positive electrode coating equipment 21 and the negative electrode coating equipment 22 can also be powder extrusion dies, and the feeding end of the powder extrusion die is connected to the discharging end of the mixing device 1. The purpose of producing the powder coating layer and the negative electrode powder coating layer 75 in this embodiment can also be achieved through the powder extrusion die.

[0058] The present invention provides a simplified core production system. Figure 1 and Figure 3 As shown, it also includes a positive electrode die-cutting device 41 and a negative electrode die-cutting device 42; the positive electrode die-cutting device 41 is arranged between the positive electrode coating equipment 21 and the winding device 3, and is used to cut the positive electrode sheet 73, and convey the cut positive electrode sheet 73 to the winding device 3; the negative electrode die-cutting device 42 is arranged between the negative electrode coating equipment 22 and the winding device 3, and is used to cut the negative electrode sheet 76, and convey the cut negative electrode sheet 76 to the winding device 3.

[0059] Optionally, the above-mentioned extremely simplified pole core production system further includes a positive electrode die-cutting device 41 and a negative electrode die-cutting device 42. In particular, the positive electrode die-cutting device 41 is arranged between the positive electrode coating device 21 and the winding device 3, and the negative electrode die-cutting device 42 is arranged between the negative electrode coating device 22 and the winding device 3. The positive electrode die-cutting device 41 is used to cut the positive electrode sheet 73, thereby cutting out structures such as a tab or an empty foil area on the positive electrode sheet 73, and the negative electrode die-cutting device 42 is used to cut the negative electrode sheet 76, thereby cutting out structures such as a tab or an empty foil area on the negative electrode sheet 76. By providing the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42, the functions of the extremely simplified pole core production system in this embodiment can be enriched and its practicality can be improved.

[0060] In this embodiment, the structures of the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42 can be the same or different. Optionally, in this embodiment, the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42 can use laser cutting, such as a laser die-cutting machine, or can use mechanical cutting methods, such as a mechanical die-cutting machine.

[0061] The present invention provides a simplified core production system. Figure 1 and Figure 3 As shown, the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42 are stacked up and down, and a middle partition 61 is provided between the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42 .

[0062] Preferably, in this embodiment, the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42 are stacked up and down to reduce the space occupied by the extremely simplified electrode core production system and achieve the purpose of extremely simplified setting. In addition, a middle partition 61 is provided between the positive electrode die-cutting device 41 and the negative electrode die-cutting device 42. On the one hand, the middle partition 61 can play a supporting role, and on the other hand, the middle partition 61 can also play a role of dust isolation.

[0063] The present invention provides a simplified core production system. Figure 1 and Figure 3 As shown, it also includes a positive electrode slitting device 51 and a negative electrode slitting device 52; the positive electrode slitting device 51 is arranged between the positive electrode die-cutting device 41 and the winding device 3, and is used to cut the positive electrode sheet 73 from the positive electrode die-cutting device 41, and convey the cut positive electrode sheet 73 to the winding device 3; the negative electrode slitting device 52 is arranged between the negative electrode die-cutting device 42 and the winding device 3, and is used to cut the negative electrode sheet 76 from the negative electrode die-cutting device 42, and convey the cut negative electrode sheet 76 to the winding device 3.

[0064] Furthermore, the extremely simplified electrode core production system further includes a positive electrode slitting device 51 and a negative electrode slitting device 52. The positive electrode slitting device 51 is arranged between the positive electrode die-cutting device 41 and the winding device 3, and the negative electrode die-cutting device 42 is arranged between the negative electrode die-cutting device 42 and the winding device 3. After the positive electrode sheet 73 is processed by the positive electrode die-cutting device 41, the die-cutting positive electrode sheet 73 is transported to the positive electrode slitting device 51 for slitting, and the positive electrode sheet 73 is cut by the positive electrode slitting device 51, thereby removing the excess part of the positive electrode sheet 73 to obtain the positive electrode sheet 73 that meets the preset size; similarly, after the negative electrode sheet 76 is processed by the negative electrode die-cutting device 42, the die-cutting negative electrode sheet 76 is transported to the negative electrode slitting device 52 for slitting, and the negative electrode sheet 76 is cut by the negative electrode slitting device 52, thereby removing the excess part of the negative electrode sheet 76 to obtain the negative electrode sheet 76 that meets the preset size.

[0065] In this embodiment, the structures of the positive electrode slitting device 51 and the negative electrode slitting device 52 can be the same or different. Optionally, in this embodiment, the positive electrode slitting device 51 and the negative electrode slitting device 52 can use laser cutting, such as a laser slitting machine, or can use mechanical cutting methods, such as a mechanical slitting machine.

[0066] The present invention provides a simplified core production system. Figure 1 and Figure 3 As shown, the positive electrode cutting device 51 and the negative electrode cutting device 52 are stacked up and down, and a middle partition 61 is provided between the positive electrode cutting device 51 and the negative electrode cutting device 52.

[0067] Preferably, in this embodiment, the positive electrode slitting device 51 and the negative electrode slitting device 52 are stacked up and down to reduce the space occupied by the extremely simplified electrode core production system and achieve the purpose of extremely simplified setting. In addition, a middle partition 61 is provided between the positive electrode slitting device 51 and the negative electrode slitting device 52. On the one hand, the middle partition 61 can play a supporting role, and on the other hand, the middle partition 61 can also play a role of dust isolation.

[0068] The present invention provides a simplified core production system. Figure 1 , Figure 3 and Figure 4 As shown, a positive electrode correction mechanism 83 and a positive electrode buffer mechanism 81 are provided between the positive electrode coating device 21 and the positive electrode die-cutting device 41, and / or, a positive electrode correction mechanism 83 and a positive electrode buffer mechanism 81 are provided between the positive electrode slitting device 51 and the winding device 3; the positive electrode correction mechanism 83 is used for correcting the positive electrode sheet 73, and the positive electrode buffer mechanism 81 is used for controlling the tension of the positive electrode sheet 73; a negative electrode correction mechanism 84 and a negative electrode buffer mechanism 82 are provided between the negative electrode coating device 22 and the negative electrode die-cutting device 42, and / or, a negative electrode correction mechanism 84 and a negative electrode buffer mechanism 82 are provided between the negative electrode slitting device 52 and the winding device 3; the negative electrode correction mechanism 84 is used for correcting the negative electrode sheet 76, and the negative electrode buffer mechanism 82 is used to control the tension of the negative electrode sheet 76.

[0069] Preferably, in this embodiment, a positive electrode deflection correction mechanism 83, a positive electrode buffer mechanism 81, a negative electrode deflection correction mechanism 84 and a negative electrode buffer mechanism 82 are further included. Among them, the positive electrode deflection correction mechanism 83 is used for deflection correction of the positive electrode sheet 73, so as to prevent the positive electrode sheet 73 from being offset during the movement, and the positive electrode buffer mechanism 81 is used for buffering the positive electrode sheet 73, so as to control the tension of the positive electrode sheet 73, so as to prevent the positive electrode sheet 73 from being broken; the negative electrode deflection correction mechanism 84 is used for deflection correction of the negative electrode sheet 76, so as to prevent the negative electrode sheet 76 from being offset during the movement, and the negative electrode buffer mechanism 82 is used for buffering the negative electrode sheet 76, so as to control the tension of the negative electrode sheet 76. Optionally, in this embodiment, the positive electrode correction mechanism 83 and the positive electrode cache mechanism 81 can be arranged between the positive electrode coating device 21 and the positive electrode die-cutting device 41, or between the positive electrode slitting device 51 and the winding device 3. Preferably, in this embodiment, the positive electrode correction mechanism 83 and the positive electrode cache mechanism 81 are provided between the positive electrode coating device 21 and the positive electrode die-cutting device 41, and between the positive electrode slitting device 51 and the winding device 3; the negative electrode correction mechanism 84 and the negative electrode cache mechanism 82 can be arranged between the negative electrode coating device 22 and the negative electrode die-cutting device 42, or between the negative electrode slitting device 52 and the winding device 3. Preferably, in this embodiment, the negative electrode correction mechanism 84 and the negative electrode cache mechanism 82 are provided between the negative electrode coating device 22 and the negative electrode die-cutting device 42, and between the negative electrode slitting device 52 and the winding device 3.

[0070] Optionally, in the present embodiment, the positive electrode cache mechanism 81 and the negative electrode cache mechanism 82 have the same structure, both of which are composed of a plurality of cache rollers, all of which are arranged alternately up and down in sequence, and the cache rollers are arranged in a floating manner, and the roller frames of the cache rollers can be slidably connected to the frame of the extremely simplified pole core production system, and cooperated with telescopic parts such as air cylinders and oil cylinders, and the positions of the cache rollers can be adjusted to achieve tension control of the positive electrode sheet 73 and the negative electrode sheet 76.

[0071] An extremely simplified electrode core production system provided by an embodiment of the utility model also includes a monitoring mechanism, which is used to monitor the tension information of the positive electrode plate 73 and the tension information of the negative electrode plate 76, and feed back the monitoring information to the positive electrode cache mechanism 81 and the negative electrode cache mechanism 82. The positive electrode cache mechanism 81 controls the tension of the positive electrode plate 73 according to the information fed back by the monitoring mechanism, and the negative electrode cache mechanism 82 controls the tension of the negative electrode plate 76 according to the information fed back by the monitoring mechanism.

[0072] In this embodiment, a monitoring mechanism for monitoring the tension of the positive electrode sheet 73 and the negative electrode sheet 76 is also included. The monitoring mechanism can be a monitoring roller. The positive electrode sheet 73 and the negative electrode sheet 76 pass through the tension roller. By monitoring the pressure of the tension roller, the tension of the positive electrode sheet 73 and the negative electrode sheet 76 is obtained. The positive electrode buffer mechanism 81 and the negative electrode buffer mechanism 82 are both electrically connected to the monitoring mechanism. The monitoring information of the monitoring mechanism is fed back to the positive electrode buffer mechanism 81 and the negative electrode buffer mechanism 82. The positive electrode buffer mechanism 81 and the negative electrode buffer mechanism 82 control the tension of the positive electrode sheet 73 and the negative electrode sheet 76 according to the information fed back by the monitoring mechanism, so as to avoid the positive electrode sheet 73 and the negative electrode sheet 76 from breaking.

[0073] An extremely simplified pole core production system provided by an embodiment of the utility model further includes a driving mechanism, and the driving mechanism is used to drive the positive pole piece 73 and the negative pole piece 76 to move.

[0074] In this embodiment, the driving mechanism is a power roller, which is used to drive the positive electrode plate 73 and the negative electrode plate 76 to move.

[0075] The present embodiment provides an extremely simplified pole core production system. Compared with the prior art, it has no winding and unwinding mechanism, and the pole core production line is fully linked, with the positive and negative poles integrated together. Its ultra-short line eliminates the baking of the pole pieces. It adopts dry coating, and there is no need to recycle toxic solvents, which saves the environment. Moreover, it can also realize the simultaneous production of the positive pole piece 73 and the negative pole piece 76.

[0076] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0077] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simplified core production system, characterized in that: include: A mixing device (1), a coating device (2) and a winding device (3); The coating device (2) comprises a positive electrode coating device (21) and a negative electrode coating device (22), and the mixing device (1) supplies materials to the positive electrode coating device (21) to produce a positive electrode sheet (73), and supplies materials to the negative electrode coating device (22) to produce a negative electrode sheet (76); The winding device (3) is used to receive the positive electrode sheet (73) and the negative electrode sheet (76), and to wind the positive electrode sheet (73) and the negative electrode sheet (76) with the separator (77) to form a pole core.

2. The extremely simplified core production system according to claim 1, characterized in that: The mixing device (1) comprises a positive electrode dispersing device (11), a positive electrode feeding device (12), a negative electrode dispersing device (13) and a negative electrode feeding device (14); The positive electrode dispersing device (11) is used to disperse the raw materials of the positive electrode powder coating layer (72) of the positive electrode plate (73); the positive electrode feeding device (12) is arranged at the discharge end of the positive electrode dispersing device (11) and is used to screen and distribute the incoming materials of the positive electrode dispersing device (11); the feeding end of the positive electrode coating device (21) is connected to the discharge end of the positive electrode feeding device (12); The negative electrode dispersion device (13) is used to disperse the raw materials of the negative electrode powder coating layer (75) of the negative electrode plate (76); the negative electrode feeding device (14) is arranged at the discharge end of the negative electrode dispersion device (13) and is used to screen and distribute the incoming materials of the negative electrode dispersion device (13); the discharge end of the negative electrode coating device (22) is connected to the discharge end of the negative electrode feeding device (14).

3. The extremely simplified core production system according to claim 1, characterized in that: The positive electrode coating device (21) comprises a positive electrode pressing mechanism (211) and a positive electrode compounding mechanism (212), and the negative electrode coating device (22) comprises a negative electrode pressing mechanism (221) and a negative electrode compounding mechanism (222); The positive electrode pressing mechanism (211) is used to press the incoming materials from the mixing device (1) into a positive electrode powder coating layer (72), and the positive electrode compounding mechanism (212) is used to compound the positive electrode current collector (71) and the positive electrode powder coating layer (72) into the positive electrode plate (73); The negative electrode pressing mechanism (221) is used to press the incoming materials from the mixing device (1) into a negative electrode powder coating layer (75), and the negative electrode compounding mechanism (222) is used to compound the negative electrode current collector (74) and the negative electrode powder coating layer (75) into the negative electrode plate (76).

4. The extremely simplified core production system according to claim 1, characterized in that: It also includes a positive electrode die-cutting device (41) and a negative electrode die-cutting device (42); The positive electrode die-cutting device (41) is arranged between the positive electrode coating device (21) and the winding device (3), and is used for cutting the positive electrode sheet (73) and conveying the cut positive electrode sheet (73) to the winding device (3); The negative electrode die-cutting device (42) is arranged between the negative electrode coating device (22) and the winding device (3), and is used for cutting the negative electrode sheet (76) and conveying the cut negative electrode sheet (76) to the winding device (3).

5. The extremely simplified core production system according to claim 4, characterized in that: The positive electrode die-cutting device (41) and the negative electrode die-cutting device (42) are stacked up and down, and an intermediate partition (61) is provided between the positive electrode die-cutting device (41) and the negative electrode die-cutting device (42).

6. The extremely simplified pole core production system according to claim 4, characterized in that: It also includes a positive electrode cutting device (51) and a negative electrode cutting device (52); The positive electrode slitting device (51) is arranged between the positive electrode die-cutting device (41) and the winding device (3), and is used for cutting the positive electrode sheet (73) from the positive electrode die-cutting device (41), and conveying the cut positive electrode sheet (73) to the winding device (3); The negative electrode slitting device (52) is arranged between the negative electrode die-cutting device (42) and the winding device (3), and is used for cutting the negative electrode sheet (76) from the negative electrode die-cutting device (42), and conveying the cut negative electrode sheet (76) to the winding device (3).

7. The extremely simplified pole core production system according to claim 6, characterized in that: The positive electrode cutting device (51) and the negative electrode cutting device (52) are stacked up and down, and an intermediate partition (61) is provided between the positive electrode cutting device (51) and the negative electrode cutting device (52).

8. The extremely simplified pole core production system according to claim 6, characterized in that: A positive electrode deviation correction mechanism (83) and a positive electrode buffer mechanism (81) are provided between the positive electrode coating device (21) and the positive electrode die-cutting device (41), and / or a positive electrode deviation correction mechanism (83) and a positive electrode buffer mechanism (81) are provided between the positive electrode slitting device (51) and the winding device (3); The positive electrode deviation correction mechanism (83) is used for correcting the deviation of the positive electrode sheet (73), and the positive electrode buffer mechanism (81) is used for controlling the tension of the positive electrode sheet (73); A negative electrode deviation correction mechanism (84) and a negative electrode buffer mechanism (82) are provided between the negative electrode coating device (22) and the negative electrode die-cutting device (42), and / or a negative electrode deviation correction mechanism (84) and a negative electrode buffer mechanism (82) are provided between the negative electrode slitting device (52) and the winding device (3); The negative electrode deviation correction mechanism (84) is used for correcting the deviation of the negative electrode plate (76), and the negative electrode buffer mechanism (82) is used for controlling the tension of the negative electrode plate (76).

9. The extremely simplified pole core production system according to claim 8, characterized in that: The device also includes a monitoring mechanism, which is used to monitor the tension information of the positive electrode plate (73) and the tension information of the negative electrode plate (76), and feed back the monitoring information to the positive electrode buffer mechanism (81) and the negative electrode buffer mechanism (82), wherein the positive electrode buffer mechanism (81) controls the tension of the positive electrode plate (73) according to the information fed back by the monitoring mechanism, and the negative electrode buffer mechanism (82) controls the tension of the negative electrode plate (76) according to the information fed back by the monitoring mechanism.

10. The extremely simplified core production system according to claim 1, characterized in that: It also includes a driving mechanism, which is used to drive the positive electrode plate (73) and the negative electrode plate (76) to move.

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