Electrode dry rolling equipment and lithium battery production method thereof

Abstract

The invention discloses electrode dry rolling equipment and a lithium battery production method thereof. The electrode dry rolling equipment comprises a rolling mechanism, a feeding mechanism and a trimming and scraping mechanism. The rolling mechanism comprises a first small roller system, a second small roller system, a third large roller system, a fourth large roller system, a fifth large roller system and a sixth large roller system which are arranged in sequence, and roller gaps are formed among the first small roller system, the second small roller system, the third large roller system, the fourth large roller system, the fifth large roller system and the sixth large roller system; the feeding mechanism is used for feeding materials between the first small roller system and the second small roller system for rolling film forming, a formed film sequentially winds through roller gaps of the second small roller system, the third large roller system, the fourth large roller system and the fifth large roller system for thinning treatment, and the trimming scraping mechanism at the position of the fifth large roller system is used for conducting breadth correction on the formed film. According to the electrode dry rolling equipment, powder is automatically fed into the equipment, a formed film is gradually thinned through roll gaps of all roll systems, edge cutting is achieved, and finally the formed film with the required thickness and the specified breadth is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of dry rolling of lithium battery electrodes, and in particular to an electrode dry rolling device and a lithium battery production method thereof. Background Art

[0002] In the production process of lithium batteries, the electrode powder needs to be rolled into a film, and then the rolled film is composited with the current collector foil to obtain the required composite material.

[0003] How to design and develop an electrode dry rolling equipment to automatically put powder into the equipment, gradually thin the film through the roller gaps of each roller system and achieve edge trimming, and finally obtain a film of the required thickness and specified width, this is a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electrode dry rolling equipment, which can realize automatic feeding of powder into the equipment, gradually thinning the film through the roller gaps of each roller system and realizing edge trimming, and finally obtaining a film of the required thickness and specified width.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] An electrode dry rolling device comprises: a rolling mechanism, a feeding mechanism, and a trimming and scraping mechanism;

[0007] The rolling mechanism comprises a first small roller system, a second small roller system, a third large roller system, a fourth large roller system, a fifth large roller system, and a sixth large roller system, which are arranged in sequence and form a roller gap between each other; wherein the third large roller system is a fixed roller system, and the first small roller system, the second small roller system, the fourth large roller system, the fifth large roller system, and the sixth large roller system are movable roller systems, so as to realize the size adjustment of the roller gap;

[0008] The feeding mechanism is used to feed the material between the first small roller system and the second small roller system for roller pressing to form a film. The formed film is sequentially passed through the roller gaps of the second small roller system, the third large roller system, the fourth large roller system, and the fifth large roller system for thinning. The trimming and scraping mechanism at the fifth large roller system is used to correct the width of the formed film.

[0009] In one embodiment, the feeding mechanism includes a hopper, a feeding trough, a guide groove, and a roller side baffle which are connected in sequence along the vertical direction;

[0010] A groove roller is provided in the feeding trough, and a material distribution motor is drivingly connected to the groove roller;

[0011] A large particle screen is provided at the junction of the hopper and the upper chute.

[0012] In one of the embodiments, a screen deposited material detector is provided at the feed inlet of the hopper, a groove roller deposited material detector is provided at the upper trough, and a roller deposited material detector is provided at the guide groove.

[0013] In one of the embodiments, the electrode dry rolling equipment also includes a load-bearing mechanism; the load-bearing mechanism includes: a support frame, a load-bearing unit, and a silo; the silo is arranged on the support frame through the load-bearing unit, and a pneumatic butterfly valve is provided at the outlet of the silo.

[0014] In one of the embodiments, the electrode dry rolling equipment further includes a vibrating feeding mechanism disposed between the load-bearing mechanism and the feeding mechanism; the vibrating feeding mechanism is connected to the discharge port of the silo and the inlet port of the hopper.

[0015] In one embodiment, the electrode dry rolling equipment further includes: a small roller hydraulic system, a large roller hydraulic system, a roller gap detection mechanism, and a roller gap adjustment mechanism;

[0016] The small roller hydraulic system is used to provide film-forming liquid pressure for the roll gap between the first small roller system and the second small roller system, the large roller hydraulic system is used to provide composite liquid pressure for the roll gap between the fifth large roller system and the sixth large roller system, the roll gap detection mechanism is used to detect the size of the roll gap, and the roll gap adjustment mechanism is used to adjust the size of the roll gap.

[0017] In one of the embodiments, a water glue pressing roller mechanism is provided at the sixth large roller system.

[0018] In one embodiment, the first small roller system, the second small roller system, the third large roller system, the fourth large roller system, the fifth large roller system, and the sixth large roller system are respectively provided with scraper mechanisms.

[0019] In one embodiment, the trimming and scraping mechanism comprises: a mounting frame, a ball screw, two sets of trimming and scraping components, and two sets of negative pressure dust removal pipes;

[0020] The two groups of trimming and scraping assemblies are mounted on the mounting frame in an adjustable manner through the ball screw, and the two groups of negative pressure dust removal pipes are respectively and correspondingly arranged at the two groups of trimming and scraping assemblies;

[0021] The trimming and scraping assembly comprises: a moving seat, a cutting and separating integrated knife, and a scraping knife; the moving seat is screwed on the ball screw, the cutting and separating integrated knife and the scraping knife are both installed on the moving seat through a swing arm, and the cutting and separating integrated knife and the scraping knife are both pressed on the roller of the fifth large roller system;

[0022] Among them, the cutting and separating integrated knife includes: a cylindrical body, a cutting disc knife, and a separating thread knife; the cylindrical body is rotatably arranged on the swing arm, the cutting disc knife is formed on the end face of the cylindrical body, and the separating thread knife is formed on the side wall of the cylindrical body.

[0023] A lithium battery production method comprises the following steps:

[0024] Electrode slurry stirring;

[0025] Electrode rolling, performing electrode rolling based on the above-mentioned electrode dry rolling equipment;

[0026] Coil;

[0027] Battery shell welding and sealing;

[0028] injecting electrolyte;

[0029] Formation, sorting and assembly.

[0030] The electrode dry rolling equipment of the present invention can automatically put powder into the equipment, and the film is gradually thinned and edge cutting is achieved through the roller gaps of each roller system, and finally a film with the required thickness and specified width is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A three-dimensional diagram of an electrode dry rolling device according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A plan view of the electrode dry rolling equipment shown;

[0034] Figure 3 for Figure 2 A partial view of the electrode dry rolling equipment shown;

[0035] Figure 4 for Figure 3The structural diagram of the feeding mechanism shown;

[0036] Figure 5 for Figure 3 The structural diagram of the load-bearing mechanism, vibrating feeding mechanism and loading mechanism shown;

[0037] Figure 6 for Figure 2 A three-dimensional view of the trimming and scraping mechanism shown;

[0038] Figure 7 for Figure 6 A plan view of the trimming scraping mechanism shown;

[0039] Figure 8 for Figure 7 The structural diagram of the cutting and separating integrated knife shown;

[0040] Fig. 9 Schematic diagram of the shearing and separation of the film edge by the cutting and scraping mechanism. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] like Figure 1 and Figure 2 As shown, the present invention discloses an electrode dry rolling device 10, comprising: a rolling mechanism 100, a feeding mechanism 200, and a trimming and scraping mechanism 300.

[0045] like Figure 3As shown, the rolling mechanism 100 includes a first small roller system 110, a second small roller system 120, a third large roller system 130, a fourth large roller system 140, a fifth large roller system 150, and a sixth large roller system 160, which are arranged in sequence and form a roller gap between each other. Among them, the third large roller system 130 is a fixed roller system, and the first small roller system 110, the second small roller system 120, the fourth large roller system 140, the fifth large roller system 150, and the sixth large roller system 160 are movable roller systems to achieve the size adjustment of the roller gap.

[0046] Please also read Figures 1 to 3 The feeding mechanism 200 is used to feed the material between the first small roller system 110 and the second small roller system 120 for rolling and film forming. The formed film 20 is sequentially passed through the roller gaps of the second small roller system 120, the third large roller system 130, the fourth large roller system 140, and the fifth large roller system 150 for thinning. The trimming and scraping mechanism 300 at the fifth large roller system 150 is used to correct the width of the formed film.

[0047] In the present invention, the first small roller system 110, the second small roller system 120, the third large roller system 130, the fourth large roller system 140, the fifth large roller system 150 and the sixth large roller system 160 have the same structure, mainly including a bearing seat and a roller, the roller is rotatably arranged on the bearing seat through a bearing, and the servo motor is connected to the roller drive through a reducer. During the working process, the bearing seat needs to be cooled by a water cooler, and the operation steps are as follows: before starting the machine, first turn on the water cooler to cool the bearing seat, and then turn on the mold temperature machine; when stopping the machine, first turn off the mold temperature machine, and then turn off the water cooler.

[0048] Please also read Figures 1 to 3 In the present invention, the electrode dry rolling equipment 10 further includes: a load-bearing mechanism 400, a vibrating feeding mechanism 500, a small roller hydraulic system 600, a large roller hydraulic system 700, a roller gap detection mechanism 800, and a roller gap adjustment mechanism 900. Among them, the small roller hydraulic system is used to provide film-forming liquid pressure for the roller gap between the first small roller system 110 and the second small roller system 120, the large roller hydraulic system 700 is used to provide composite liquid pressure for the roller gap between the fifth large roller system 150 and the sixth large roller system 160, the roller gap detection mechanism 800 is used to detect the size of the roller gap (a group of roller gap detection mechanisms 800 are respectively set at each roller gap), and the roller gap adjustment mechanism 900 is used to adjust the size of the roller gap.

[0049] In the present invention, the sixth roller system 160 is provided with a water glue pressing roller mechanism 910 (such as Figure 3 As shown), the current collector foil membrane 30 passes through the sixth large roller system 160 and forms a tension partition with the water gel pressing roller mechanism 910. The specific working principle of the water gel pressing roller mechanism 910 will be described in detail below.

[0050] Next, the working principle of the electrode dry rolling device 10 of the above structure is described (please refer to Figures 1 to 3 ):

[0051] The powder is put into the load-bearing mechanism 400, and the load-bearing mechanism 400 is used to detect the weight of the powder and feed back to the system;

[0052] The load-bearing mechanism 400 falls into the vibrating feeding mechanism 500, and the vibrating feeding mechanism 500 vibrates and disperses the powder and feeds it to the feeding mechanism 200;

[0053] The feeding mechanism 200 allows the material to evenly fall into the roller gap between the first small roller system 110 and the second small roller system 120, and the first small roller system 110 and the second small roller system 120 roll the material into a film, and the film is sequentially passed through the roller gaps of the second small roller system 120, the third large roller system 130, the fourth large roller system 140, and the fifth large roller system 150 for thinning.

[0054] The film is passed through the trimming and scraping mechanism 300 above the fifth large roller system 150, and the trimming and scraping mechanism 300 corrects the width of the film; at the same time, the current collector foil film 30 passes through the sixth large roller system 160 and the water-gel pressing roller mechanism 910 to form a tension partition, and then passes through the fifth large roller system 150 and the sixth large roller system 160; thus, the current collector foil film and the film can be compositely rolled to obtain the composite material 40;

[0055] The composite current collector foil and the film (composite material 40) are then subjected to a micro-tension mechanism 930 (such as Figure 2 As shown, the swing roller mechanism 931, the tension roller mechanism 932, and the over-roller mechanism 933 enter the next process;

[0056] like Figure 3 As shown, the third large roller system 130 is a fixed roller, which is used to realize the separation of large and small rollers and large and small pressures; the small roller hydraulic system 600 is used to provide film-forming liquid pressure for the roller gap between the first small roller system 110 and the second small roller system 120, so as to realize the small pressure film formation of powder; the large roller hydraulic system 700 is used to provide compounding liquid pressure for the roller gap between the fifth large roller system 150 and the sixth large roller system 160, so as to realize the large pressure compounding of the current collector foil film 30 and the film forming 20;

[0057] The roll gap detection mechanism 800 is used to detect the size of the roll gap, for example, a detection switch may be provided; the roll gap adjustment mechanism 900 is used to adjust the size of the roll gap, for example, a servo motor may drive an oil cylinder for position control;

[0058] In the present invention, a roll gap adjustment mechanism 900 and a roll gap detection mechanism 800 are arranged between all roll systems to perform joint control of the roll gaps; the small roll hydraulic system 600 performs low-pressure film formation, and the large roll hydraulic system 700 performs high-pressure composite formation, and all roll gaps and system pressures are linked in conjunction with a thickness gauge to control the roll gap data and composite film thickness in real time.

[0059] Next, the structure of the feeding mechanism 200 is described in detail:

[0060] like Figure 4 As shown, the feeding mechanism 200 includes a hopper 210, a feeding trough 220, a guide groove 230, and a roller side baffle 240 which are arranged in sequence along the vertical direction. A groove roller 250 is arranged in the feeding trough 220, a material distribution motor 260 (such as Figure 5 As shown) is drivingly connected to the groove roller 250; a large particle screen 270 is provided at the junction of the hopper 210 and the upper chute 220.

[0061] like Figure 4 As shown, further, a screen deposited material detector 211 is provided at the feeding port of the hopper 210 , a groove roller deposited material detector 221 is provided at the upper trough 220 , and a roller deposited material detector 231 is provided at the guide trough 230 .

[0062] The powder reaches the hopper 210 through the vibrating feeding mechanism 500, and reaches the feeding trough 220 through the large-particle screen 270. The groove roller 250 is driven by the material leveling motor 260 to evenly feed the powder. According to the uniformity of feeding, the screen accumulation material detector 211 and the groove roller accumulation material detector 221 perform accumulation detection, and the roller accumulation material detector 231 detects the height of the powder in the roller. The roller side baffle 240 limits the powder to fall into the roller gap with a specified width.

[0063] Next, the specific structures of the load-bearing mechanism 400 and the vibrating feeding mechanism 500 are described:

[0064] like Figure 5 As shown, the load-bearing mechanism 400 includes: a support frame 410, a load-bearing unit 420, and a silo 430. The silo 430 is disposed on the support frame 410 through the load-bearing unit 420, and a pneumatic butterfly valve 440 is disposed at the outlet of the silo 430.

[0065] like Figure 5 As shown, the vibrating feeding mechanism 500 is disposed between the load-bearing mechanism 400 and the feeding mechanism 200 , and the vibrating feeding mechanism 500 is connected to the discharge port of the silo 430 and the inlet port of the hopper 210 .

[0066] The silo 430 is filled with powder, the load-bearing unit 420 bears the weight of the powder and feeds back the powder consumption during the working time, and the pneumatic butterfly valve 440 is used to control the opening or closing of the discharge port of the silo 430; the powder falls into the vibrating feeding mechanism 500 from the discharge port of the silo 430, and the powder reaches the vibration plate. The vibration motor drives the vibration unit to vibrate and disperse the powder, and the powder is vibrated and evenly vibrated to the inlet of the hopper 210.

[0067] like Figure 2 As shown, in the present invention, the first small roller system 110, the second small roller system 120, the third large roller system 130, the fourth large roller system 140, the fifth large roller system 150, and the sixth large roller system 160 are respectively provided with a scraper mechanism 920, that is, all roller systems are provided with a scraper mechanism, and the scraper mechanism cleans the roller surface. Each roller system is individually controlled by a mold temperature controller, and the real-time temperature is individually controlled.

[0068] like Figure 1 , Figure 2 and Figure 3 As shown, in the present invention, a trimming and scraping mechanism 300 is provided at the fifth large roller system 150, and the trimming and scraping mechanism 300 is used to correct the width of the film. When the film passes through the fifth large roller system 150, the relevant components are adaptively adjusted according to the width of the film, so as to shear and scrape the two sides of the film.

[0069] First, you need to use a cutter to cut out the excess waste on both sides of the film, then use a scraper to scrape up the cut waste, and finally use a negative pressure tube to suck away the scraped waste.

[0070] In actual use, it is found that after the excess waste on both sides of the film is cut out by the cutter, the excess waste will temporarily adhere to the film body, which will make it difficult to set the position of the scraper. If the scraper is set closer to the film body, it is easy to scrape the edge of the film body, resulting in poor production of the film body; if the scraper is set farther away from the film body, it is difficult to scrape all the waste, resulting in waste accumulation, which brings inconvenience to production.

[0071] In order to solve the above technical problems, the present invention optimizes the specific structure of the trimming and scraping mechanism 300. Figure 6 As shown, specifically, the trimming and scraping mechanism 300 includes: a mounting frame 310 , a ball screw 320 , two sets of trimming and scraping components 330 , and two sets of negative pressure dust removal pipes 340 .

[0072] like Figure 6 As shown, two groups of trimming and scraping assemblies 330 are mounted on the mounting frame 310 in a positionally adjustable manner through a ball screw 320 , and two groups of negative pressure dust removal pipes 340 are respectively and correspondingly arranged at the two groups of trimming and scraping assemblies 330 .

[0073] like Figure 6 As shown, the trimming and scraping assembly 330 includes: a moving seat 350, a cutting and separating integrated knife 360, and a scraping knife 370. The moving seat 350 is screwed on the ball screw 320, and the cutting and separating integrated knife 360 ​​and the scraping knife 370 are both installed on the moving seat 350 through a swing arm 380. The cutting and separating integrated knife 360 ​​and the scraping knife 370 are both pressed on the roller 151 of the fifth large roller system 150.

[0074] like Figure 7 and Figure 8 As shown, the cutting and separating integrated knife 360 ​​includes: a cylindrical body 361, a cutting disc knife 362, and a separating thread knife 363. The cylindrical body 361 is rotatably arranged on the swing arm 380, the cutting disc knife 362 is formed on the end surface of the cylindrical body 361, and the separating thread knife 363 is formed on the side wall of the cylindrical body 361.

[0075] Next, the working principle of the above-mentioned trimming and scraping mechanism 300 is described (please refer to Figure 8 and Fig. 9 ):

[0076] The two sets of trimming and scraping components 330 are adjusted relative to each other through the ball screw 320, so as to correct the width of the film to a specified size;

[0077] The cutting and separating integrated knife 360 ​​and the scraping knife 370 are both pressed and held on the rollers of the fifth large roller system 150;

[0078] As the rollers of the fifth large roller system 150 rotate, the film to be trimmed reaches the cutting and separation integrated knife 360. At the same time, since the cylindrical body 361 is supported on the rollers of the fifth large roller system 150, the cylindrical body 361 rotates along with the rotation of the rollers.

[0079] The cutting disc knife 362 on the cutting and separation integrated knife 360 ​​shears the edges of both sides of the film, thereby obtaining the film-forming body and the waste material separated from each other. It should be noted that although the film-forming body and the waste material are cut off at this time, the film-forming body 21 and the waste material 22 are still adhered to each other; at the same time, the separation thread knife 363 has a thread structure, and the separation thread knife 363 rotates with the cylindrical body 361 to form a spiral motion, and the separation thread knife 363 is pressed against the cut waste material, and the waste material is deviated to the side away from the film-forming body by the spiral motion of the separation thread knife 363, thereby realizing the separation of the film-forming body and the waste material;

[0080] Then, the deflected waste material quickly reaches the scraper 370, which scoops up the waste material and enters the negative pressure dust removal pipe 340, where the waste material is sucked away.

[0081] It should be noted that since the waste is offset to the side away from the film-forming body due to the spiral motion of the separation thread cutter 363, the film-forming body and the waste are quickly separated from each other. In this way, the scraper 370 and the negative pressure dust removal pipe 340 can be appropriately set in a direction away from the film-forming body. The scraper 370 and the negative pressure dust removal pipe 340 will not be set too close to the film-forming body. The scraper 370 will not directly touch the film-forming body, and the suction force of the negative pressure dust removal pipe 340 will not directly act on the edge of the film-forming body. The generated waste can also be quickly separated from the film-forming body, thereby improving the yield of the film-forming body.

[0082] The cutting and separating integrated knife 360 ​​of the present invention integrates the cutting disc knife 362 and the separating thread knife 363 on the cylindrical body 361. The cylindrical body 361 rotates with the rotation of the roller, and the cutting disc knife 362 and the separating thread knife 363 rotate accordingly to respectively realize the functions of film shearing and waste separation. The cutting and separating integrated knife 360 ​​has a simple structure, is easy to produce and process, and has good performance.

[0083] The present invention also discloses a lithium battery production method, comprising the following steps:

[0084] Electrode slurry stirring;

[0085] Electrode rolling, based on the above-mentioned electrode dry rolling equipment, electrode rolling is performed; the feeding mechanism 200 allows the material to evenly fall into the roller gap between the first small roller system 110 and the second small roller system 120, and the first small roller system 110 and the second small roller system 120 roll the material into a film, and the film is sequentially passed through the roller gaps of the second small roller system 120, the third large roller system 130, the fourth large roller system 140, and the fifth large roller system 150 for thinning; the film passes through the trimming and scraping mechanism 300 above the fifth large roller system 150, and the trimming and scraping mechanism 300 corrects the width of the film; at the same time, the current collector foil film 30 passes through the sixth large roller system 160 and the water glue pressing roller mechanism 910 to form a tension separation, and then passes through the fifth large roller system 150 and the sixth large roller system 160; thus, the current collector foil film and the film can be compositely rolled to obtain a composite material 40;

[0086] Coil;

[0087] Battery shell welding and sealing;

[0088] injecting electrolyte;

[0089] Formation, sorting and assembly.

[0090] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An electrode dry rolling device, characterized in that: include: Rolling mechanism, feeding mechanism, trimming and scraping mechanism; The rolling mechanism comprises a first small roller system, a second small roller system, a third large roller system, a fourth large roller system, a fifth large roller system, and a sixth large roller system, which are arranged in sequence and form a roller gap between each other; wherein the third large roller system is a fixed roller system, and the first small roller system, the second small roller system, the fourth large roller system, the fifth large roller system, and the sixth large roller system are movable roller systems, so as to realize the size adjustment of the roller gap; The feeding mechanism is used to feed the material between the first small roller system and the second small roller system for roller pressing to form a film. The formed film is sequentially passed through the roller gaps of the second small roller system, the third large roller system, the fourth large roller system, and the fifth large roller system for thinning. The trimming and scraping mechanism at the fifth large roller system is used to correct the width of the formed film.

2. The electrode dry rolling equipment according to claim 1, characterized in that: The feeding mechanism comprises a hopper, a feeding trough, a guide trough, and a roller side baffle which are arranged in sequence in a vertical direction; A groove roller is provided in the feeding trough, and a material distribution motor is drivingly connected to the groove roller; A large particle screen is provided at the junction of the hopper and the upper chute.

3. The electrode dry rolling equipment according to claim 2, characterized in that: A screen deposited material detector is provided at the feeding port of the hopper, a groove roller deposited material detector is provided at the upper feeding trough, and a roller deposited material detector is provided at the guide trough.

4. The electrode dry rolling equipment according to any one of claims 1 to 3, characterized in that: The electrode dry rolling equipment also includes a load-bearing mechanism; the load-bearing mechanism includes: a support frame, a load-bearing unit, and a silo; the silo is arranged on the support frame through the load-bearing unit, and a pneumatic butterfly valve is provided at the outlet of the silo.

5. The electrode dry rolling equipment according to claim 4, characterized in that: The electrode dry rolling equipment also includes a vibrating feeding mechanism arranged between the load-bearing mechanism and the feeding mechanism; the vibrating feeding mechanism is connected to the discharge port of the silo and the inlet port of the hopper.

6. The electrode dry rolling equipment according to claim 1, characterized in that: The electrode dry rolling equipment also includes: a small roller hydraulic system, a large roller hydraulic system, a roller gap detection mechanism, and a roller gap adjustment mechanism; The small roller hydraulic system is used to provide film-forming liquid pressure for the roll gap between the first small roller system and the second small roller system, the large roller hydraulic system is used to provide composite liquid pressure for the roll gap between the fifth large roller system and the sixth large roller system, the roll gap detection mechanism is used to detect the size of the roll gap, and the roll gap adjustment mechanism is used to adjust the size of the roll gap.

7. The electrode dry rolling equipment according to claim 1, characterized in that: The sixth large roller system is provided with a water glue pressing roller mechanism.

8. The electrode dry rolling equipment according to claim 1, characterized in that: The first small roller system, the second small roller system, the third large roller system, the fourth large roller system, the fifth large roller system, and the sixth large roller system are respectively provided with scraper mechanisms.

9. The electrode dry rolling equipment according to claim 1, characterized in that: The trimming and scraping mechanism comprises: a mounting frame, a ball screw, two sets of trimming and scraping components, and two sets of negative pressure dust removal pipes; The two groups of trimming and scraping assemblies are mounted on the mounting frame in an adjustable manner through the ball screw, and the two groups of negative pressure dust removal pipes are respectively and correspondingly arranged at the two groups of trimming and scraping assemblies; The trimming and scraping assembly comprises: a moving seat, a cutting and separating integrated knife, and a scraping knife; the moving seat is screwed on the ball screw, the cutting and separating integrated knife and the scraping knife are both installed on the moving seat through a swing arm, and the cutting and separating integrated knife and the scraping knife are both pressed on the roller of the fifth large roller system; Among them, the cutting and separating integrated knife includes: a cylindrical body, a cutting disc knife, and a separating thread knife; the cylindrical body is rotatably arranged on the swing arm, the cutting disc knife is formed on the end face of the cylindrical body, and the separating thread knife is formed on the side wall of the cylindrical body.

10. A lithium battery production method, characterized in that: The steps include: Electrode slurry stirring; Electrode rolling, the electrode rolling is performed based on the electrode dry rolling equipment according to any one of claims 1 to 9; Coil; Battery shell welding and sealing; injecting electrolyte; Formation, sorting and assembly.

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