Recycling method of cylindrical lithium battery

Abstract

The invention belongs to the technical field of battery recycling or recycling, and particularly relates to a cylindrical lithium battery recycling method which comprises the following steps: 1) obtaining a waste cylindrical lithium battery; 2) detecting the appearance of the battery; the cylindrical lithium batteries are classified according to defects and intact conditions, the intact batteries are sent to the step 3), and the defective batteries are sent to the whole to be smashed; 3) battery performance detection; the cylindrical lithium batteries are classified according to reduced-configuration use and to-be-disassembled, the batteries capable of being used in a reduced-configuration mode are taken out for standby application, and the batteries to be disassembled are sent to the step 4); 4) discharging the battery; 5) stripping a plastic packaging film on the surface of the battery; 6) cutting a battery metal shell; (7) disassembling the inner core of the battery; the method is implemented based on a battery reuse production line. According to the invention, the recycling of the waste cylindrical lithium ion battery can be systematically carried out, the battery part which is reduced for use and integrally crushed is separated, and the assembly line classified disassembly and recovery operation of the battery to be disassembled is also carried out, so that the mode is richer, and the practicability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of battery recycling or recovery and reuse, and specifically relates to a cylindrical lithium battery recycling method. Background Art

[0002] After cylindrical lithium-ion batteries reach the original design service life of the original product, they need to be considered for scrapping or replacement. At present, a large number of waste cylindrical lithium-ion batteries are directly crushed as a whole and recycled by dry or wet methods for valuable elements. The recycling efficiency is very low and the targeting is poor. Some of them also use battery disassembly equipment such as the one disclosed in Chinese patent CN207781839U (or similar) to gradually disassemble cylindrical lithium-ion batteries for classified recycling, improve targeting and recycling efficiency, but the main functional design is focused on how to separate the shell and the battery cell, and there are still deficiencies in the disassembly or classification of recyclable waste on the battery.

[0003] Moreover, the current recycling of waste cylindrical lithium-ion batteries is not systematic enough and the methods are single. From a more comprehensive and reasonable perspective, it should be processed in a progressive manner as follows: 1. Apply to low-end (such as electric vehicles with low endurance requirements) electrical products and directly reuse; 2. Detect and classify, and formulate recycling methods according to different levels. Good products are directly reused in electrical appliances with lower power requirements, and defective products are decomposed and recycled; 3. For defective products with intact appearance, targeted disassembly and classification recycling; 4. For defective products with damaged appearance, adopt a simplified treatment method, crush them as a whole, and recover valuable elements for reuse.

[0004] Among them, for the third method, the cylindrical lithium-ion battery usually includes an internal battery cell, a shell that protects and contains the battery cell and has positive and negative electrodes, and a plastic cover surface layer wrapped on the surface of the shell, that is, a plastic film. The plastic film, shell, and battery cell of the cylindrical lithium battery from the outside to the inside should all be considered for disassembly and classification. The battery cell is composed of a positive electrode layer, a negative electrode layer, and two insulating layers that block the contact between the positive electrode layer and the negative electrode layer. It is rolled in the shell, and the battery cell itself can also be further disassembled and classified for recycling. It should be fully considered when disassembling and classifying recycling, and try to adapt. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method for recycling cylindrical lithium batteries, thereby avoiding the problems of the current recycling methods or equipment for waste cylindrical lithium-ion batteries being not systematic and having a single method, and achieving the effect of facilitating a more comprehensive and reasonable treatment of waste cylindrical lithium-ion batteries.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The method for recycling cylindrical lithium batteries comprises the following steps:

[0008] 1) Obtain waste cylindrical lithium batteries in batches;

[0009] 2) Battery appearance inspection; the cylindrical lithium batteries are classified into those with defective appearance and those with intact appearance, and the cylindrical lithium batteries with intact appearance are sent to step 3), and the cylindrical lithium batteries with defective appearance are sent for overall crushing;

[0010] 3) Battery performance testing; the cylindrical lithium batteries are classified into those that can be downgraded and those to be disassembled, the cylindrical lithium batteries that can be downgraded are taken out for standby use, and the cylindrical lithium batteries to be disassembled are sent to step 4);

[0011] 4) Battery discharge;

[0012] 5) Peeling off and recycling the plastic film on the battery surface;

[0013] 6) Battery metal casing cutting and recycling;

[0014] 7) Disassembly and recycling of battery cores.

[0015] Furthermore, the method is implemented based on a battery recycling production line, and the battery recycling production line comprises:

[0016] An appearance inspection device, used to implement the battery appearance inspection in step 2);

[0017] A performance testing device, used to implement the battery performance testing in step 3);

[0018] A discharge device, used to discharge the battery in step 4);

[0019] A surface peeling device, used to implement the battery surface plastic film peeling in step 5);

[0020] A disassembly device, used to implement the cutting of the battery metal shell in step 6) and the disassembly of the battery core in step 7);

[0021] The conveying robot device is used to move the cylindrical lithium batteries within the above steps or / and between the steps.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The cylindrical lithium battery recycling method and battery recycling production line of the present invention can systematically recycle waste cylindrical lithium-ion batteries, including separating the battery parts that are downgraded and crushed as a whole, and also including the assembly line classification, disassembly and recycling operations of batteries classified as to be disassembled. The methods are richer and more practical, and waste cylindrical lithium-ion batteries can be processed more comprehensively and reasonably.

[0024] 2. The battery recycling production line of the present invention is equipped with a surface peeling device specifically used to remove and peel off the plastic film on the outer surface of the cylindrical lithium-ion battery, and further disassemble the plastic film of the battery shell to facilitate classification and recycling.

[0025] 3. The disassembling device of the battery recycling production line of the present invention can effectively cut and separate the metal shell of the battery, and can fully disassemble the battery core, thereby achieving the effect of effectively disassembling and classifying the battery core of the cylindrical lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flowchart of a cylindrical lithium battery recycling method according to an embodiment;

[0027] Figure 2 is an overall schematic diagram of a battery recycling production line in an embodiment;

[0028] Figure 3 is a schematic diagram of an appearance inspection device in a battery recycling production line in an embodiment;

[0029] Figure 4 A front view of a discharge device in a battery recycling production line of an embodiment;

[0030] Figure 5 for Figure 4 Right view of;

[0031] Figure 6 for Figure 4 A top view of

[0032] Figure 7 for Figure 5 Middle BB section view;

[0033] Figure 8 for Figure 4 Middle AA section view;

[0034] Fig. 9 For Figure 8 A schematic diagram of placing the battery as a basis;

[0035] Fig.10 for Figure 4 Schematic diagram of the discharge device cooperating with the conveying robot device in the production line;

[0036] Fig.11 It is a structural schematic diagram of a surface layer stripping device in a battery recycling production line in an embodiment;

[0037] Fig.12 for Fig.11 A front view of the surface peeling device;

[0038] Fig.13 for Fig.12lateral view of

[0039] Fig.14 for Fig.13 Sectional view of AA (mainly showing the cutting mechanism and clamping mechanism);

[0040] Fig.15 for Fig.13 Cross-sectional view of CC (mainly illustrating the peeling mechanism);

[0041] Fig.16 for Fig.14 A magnified cross-sectional view of the middle DD (the other side shows the cutting mechanism);

[0042] Fig.17 for Fig.14 A magnified cross-sectional view of the EE in the middle (the clamping mechanism is shown in another orientation);

[0043] Fig.18 is an independent schematic diagram of a cutting unit in a surface peeling device;

[0044] Fig.19 is an independent schematic diagram of a stripping unit in a surface stripping device;

[0045] Fig. 20 It is a front view of a disassembly device in a battery recycling production line of an embodiment;

[0046] Fig.21 for Fig. 20 Axonometric view of the disassembled device;

[0047] Fig. 22 A perspective view (enlarged) of the shell cutting mechanism in the disassembly device;

[0048] Fig.23 for Fig. 22 A three-dimensional view of the middle shell cutting mechanism from another angle;

[0049] Fig.24 It is a three-dimensional diagram of the inner core transport mechanism in the disassembly device;

[0050] Fig.25 A three-dimensional diagram of a disassembly base frame and related connecting parts of an inner core disassembly mechanism in a disassembly device;

[0051] Fig.26 for Fig.25 A cross-sectional view of the disassembled base frame and its related connecting parts;

[0052] Fig. 27 A three-dimensional diagram of an output unit of an inner core disassembling mechanism in a disassembling device;

[0053] Fig.28 for Fig. 27 The front view of the output unit in FIG.

[0054] Fig.29 for Fig.28 Middle AA section view (enlarged);

[0055] Fig.30 This is a schematic diagram of the process of unfolding the battery core when the device is running;

[0056] Among them, appearance detection device 1, performance detection device 2, discharge device 3, surface peeling device 4, disassembly device 5, conveying manipulator device 6, conveyor belt 7, appearance detection first unit 8, appearance detection second unit 9, discharge platform 10, side plate 11, top plate 12, sliding groove 13, boss 14, mounting plate 15, placement station 16, discharge station 17, removal station 18, discharge bin 19, channel opening 20, connecting hole 21, sliding seat 22, step hole 23, large hole section 24, small hole section 25, outer edge 26, sliding drive motor 27, upper cylinder body 2 8, upper discharge guide rod 29, upper convex edge 30, upper helical compression spring 31, lower cylinder body 32, lower discharge guide rod 33, lower convex edge 34, lower helical compression spring 35, discharge instrument 36, upper electrode end 37, lower electrode end 38, lower base 39, upper slide 40, collection box 42, drive cylinder 43, cutting unit 44, clamping unit 45, stripping unit 46, cutting telescopic cylinder 47, cutting telescopic rod 48, cutting blade 49, ring cutting drive groove 50, ring cutting drive motor 51, clamping telescopic cylinder 52, clamping block 53, stripping drive motor 54, stripping drive screw 55, Stripping scraper 56, longitudinal cutting blade 57, transverse moving drive unit 58, shell cutting mechanism 59, inner core transport mechanism 60, inner core disassembling mechanism 61, equipment base 62, lower base 63, battery horizontal placement table 64, saw disk unit 65, lateral saw disk 66, end saw disk 67, positive terminal collection box 68, cutting upper seat 69, battery clamping boss 70, circulation cutting unit 71, unloading boss 72, electromagnet 73, cross beam plate 74, grab plate 75, grab disk 76, flattening motor 77, disassembly base 78, passive display plate 79, insulation layer output port 80 , metal layer output port 81, conveying roller group 82, side sliding base 83, lifting cylinder 84, roller bracket 85, conveying roller 86, roller motor 87, side sliding motor 88, output unit 89, metal layer transition box 90, thin plate channel 91, horizontal inlet 92, receiving and conveying component 93, filter plate 94, roller 95, transition roller 96, positioning nails 97, coating scraper 98, scraper telescopic cylinder 99, metal layer collection box 100, transverse mechanical gripper 101, insulating layer collection box 102, outlet channel 103, battery core 104, cylindrical lithium battery 105. DETAILED DESCRIPTION

[0057] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0058] See also Figure 1 The cylindrical lithium battery recycling method of the specific embodiment comprises the following steps:

[0059] 1) Obtain waste cylindrical lithium batteries in batches;

[0060] 2) Battery appearance inspection; the cylindrical lithium batteries are classified into those with defective appearance and those with intact appearance, and the cylindrical lithium batteries with intact appearance are sent to step 3), and the cylindrical lithium batteries with defective appearance are sent for overall crushing;

[0061] 3) Battery performance testing; the cylindrical lithium batteries are classified into those that can be downgraded and those to be disassembled, the cylindrical lithium batteries that can be downgraded are taken out for standby use, and the cylindrical lithium batteries to be disassembled are sent to step 4);

[0062] 4) Battery discharge;

[0063] 5) Peeling off and recycling the plastic film on the battery surface;

[0064] 6) Battery metal casing cutting and recycling;

[0065] 7) Disassembly and recycling of battery cores.

[0066] See also Figure 2 The method is implemented based on a battery recycling production line, which includes:

[0067] Appearance inspection device 1, used to implement the battery appearance inspection in step 2);

[0068] Performance testing device 2, used to implement the battery performance testing in step 3);

[0069] Discharging device 3, used to discharge the battery in step 4);

[0070] Surface peeling device 4, used for peeling off the plastic film on the battery surface in step 5);

[0071] Disassembling device 5, used for implementing the cutting of the battery metal shell in step 6) and the disassembling of the battery core in step 7);

[0072] The conveying robot device 6 is used for transporting the cylindrical lithium battery within a step or / and between steps.

[0073] See also Figure 3The appearance inspection device 1 includes a first appearance inspection unit 8, a second appearance inspection unit 9 and a circulating conveyor belt 7. The conveyor belt 7 is provided with a rotating placement table at intervals to vertically hold the cylindrical lithium battery. Initially, the waste battery can be placed vertically on the rotating placement table manually. The first appearance inspection unit 8 is arranged beside the conveyor belt 7 for appearance inspection of the top surface and the upper circumferential side surface of the cylindrical lithium battery. If the cylindrical lithium battery is intact according to the appearance, it will continue to be transported forward. The first appearance inspection unit 8 grabs the top of the cylindrical lithium battery by the first group of conveying manipulators 6, takes out the rotating placement table, and moves it to the second appearance inspection unit 9. The second appearance inspection unit 9 is used for appearance inspection of the bottom end surface and the lower circumferential side surface of the cylindrical lithium battery. The bottom end surface and the lower circumferential side of the cylindrical lithium battery grasped by the first group of conveying manipulators 6 are directly inspected. During the process, the manipulator of the conveying manipulator 6 rotates to completely inspect the lower circumferential side of the cylindrical lithium battery. The detection head for appearance detection can be an existing camera. The first unit 8 for appearance detection has a lateral detection head and a top detection head. The second unit 9 for appearance detection has a lateral detection head and a bottom detection head. After image transmission and image recognition, it is compared with the pre-loaded intact appearance picture to determine whether the appearance is defective or intact, and the necessary controller of the production line controls the first group of conveyor manipulators 6 to move accordingly. When the first unit 8 for appearance detection detects that the battery appearance has defects, it does not need to be sent to the second unit 9 for appearance detection. All defective batteries detected by the two units are lifted by the first group of conveying manipulators 6 and placed on the placement platform next to the appearance detection device 1, waiting to be manually sent to the existing overall crushing process for processing. The cylindrical lithium batteries with intact appearance are moved to the performance detection device 2 by the first group of conveying manipulators 6.

[0074] Please continue to see Figure 2 The performance detection device 2 is combined with the conveying robot device 6 to facilitate the automatic detection of the performance of the cylindrical lithium battery. The battery performance tester can detect the required performance test items such as charging efficiency, charging resistance, and charging voltage of the battery, which is convenient for classification and provides more selection parameters for the recycling method. Existing equipment can be selected for implementation, such as the detection device of Chinese patent application CN117890801A. The battery performance tester is connected to the aforementioned controller, and the classification standard is pre-loaded. The controller controls the second group of conveying robot devices 6 to lift the batteries that can be downgraded and put them on the placement platform next to the performance detection device 2 in combination with the detection results of the battery performance tester, and wait for manual delivery to the appropriate downgrading processing conditions. The cylindrical lithium batteries to be disassembled are transported to the discharge device 3 by the conveying robot device 6 of the second group.

[0075] See also Figure 4-Figure 7The discharge device 3 includes a discharge platform 10, and a sliding groove 13 extending along the length direction of the discharge platform 10 is provided on the discharge platform 10, and a sliding seat 22 for carrying a battery is slidably matched in the sliding groove 13; a step hole 23 for vertically placing the battery is vertically penetrated on the sliding seat 22, and the step hole 23 includes a large hole section 24 and a small hole section 25 below the large hole section 24 so as to vertically carry the battery; specifically, the inner diameter of the large hole section 24 corresponds to the outer diameter of the cylindrical lithium battery 105, and the inner diameter of the small hole section 25 is relatively smaller, and the cylindrical lithium battery 105 can be vertically placed in the large hole section 24 and carried on the step surface where the large hole section 24 and the small hole section 25 transition.

[0076] The discharge platform 10 includes two side plates 11 facing each other vertically and a top plate 12 horizontally connected to the upper ends of the two side plates 11. A sliding groove 13 is vertically penetrated and opened on the top plate 12 and is located between the two side plates 11. A hollow discharge chamber 19 is protruded in the middle of the upper surface of the top plate 12. The inner cavity of the discharge chamber 19 is connected to the sliding groove 13. The two ends of the sliding groove 13 extend beyond the side walls of the two ends of the discharge chamber 19 respectively. The side walls of the two ends of the discharge chamber 19 are respectively provided with passage openings 20 corresponding to the two ends of the sliding groove 13 so that the sliding seat 22 carrying the battery can enter and exit. In this way, the sliding seat 22 When it moves to one end of the sliding groove 13 and is outside the discharge bin 19, it is the placement station 16. The vertical manipulator of the second group of conveying manipulators 6 can grasp the cylindrical lithium battery and vertically place it in the step hole 23 of the sliding seat 22. The sliding seat 22 moves to the middle of the sliding groove 13 through the passage opening 20 and is inside the discharge bin 19, which is the discharge station 17. The sliding seat 22 moves to the other end of the sliding groove 13 through the other end passage opening 20 and is outside the discharge bin 19, which is the removal station 18, so that the vertical manipulator of the third group of conveying manipulators 6 can grasp and take away the discharged battery. Specifically, the passage opening 20 is connected to both ends of the sliding groove 13, and the height of the passage opening 20 is greater than the top height of the battery after it is placed on the sliding seat 22.

[0077] A vertically retractable upper discharge guide rod 29 is provided in the discharge chamber 19, and a vertically retractable lower discharge guide rod 33 is provided below the top plate 12. The lower discharge guide rod 33 is located directly below the upper discharge guide rod 29 and the free end of the lower discharge guide rod 33 is opposite to the free end of the upper discharge guide rod 29. When the sliding groove 13 carrying the battery moves between the upper discharge guide rod 29 and the lower discharge guide rod 33, the upper discharge guide rod 29 extends downward to make conductive contact with the positive electrode of the battery, and the free end of the lower discharge guide rod 33 has a diameter smaller than the small hole section 25. The lower discharge guide rod 33 extends upward to pass through the small hole section 25 and make conductive contact with the negative electrode of the battery. Both the upper discharge guide rod 29 and the lower discharge guide rod 33 are made of conductive metal and are electrically connected to a discharger 36 respectively to release the residual power of the battery after the connection is made.

[0078] For assistance, see Fig. 9 and Fig.10The discharge device 3 cooperates with the conveying robot device 6, and on the horizontal discharge platform 10, a placement station 16, a discharge station 17 and a removal station 18 are formed on different length sections of the sliding groove 13. When the sliding seat 22 moves to the placement station 16 outside the discharge chamber 19, the second group of conveying robot devices 6 vertically places the cylindrical lithium battery 105 to be disassembled after the performance test in the step hole 23 of the sliding seat 22; the sliding seat 22 moves to the discharge station 17, and the upper discharge guide rod 29 moves downward. The upper discharge guide rod 29 extends out to make conductive contact with the positive electrode of the battery, and the lower discharge guide rod 33 extends upward to make conductive contact with the negative electrode of the battery. Through the conductively connected discharge instrument 36, the battery discharges the residual electricity in the discharge chamber 19; after the residual electricity is released, the upper discharge guide rod 29 retracts upward to break contact with the positive electrode of the battery, and the lower discharge guide rod 33 retracts downward to break contact with the negative electrode of the battery and escapes from the small hole section 25; finally, the sliding seat 22 moves to the removal station 18, and the conveying manipulator device 6 of the third group can grab and take away the battery after the residual electricity is released. It is reliable to use and the process is convenient and safe.

[0079] During implementation, the driving source for driving the discharge guide rod to extend and retract vertically is not limited, and can be a telescopic cylinder or a motor drive; the driving source for the sliding seat 22 to move along the sliding groove 13 is not limited, and can be a telescopic cylinder or a motor drive; the specific placement position of the discharger 36 is not limited, and the electrical connection between the discharge guide rod and the discharger 36 can be a flexible wire connection or other conductive connection forms; the discharger 36 is an existing product, and the residual power of the battery can be released by conducting with the positive and negative poles of the battery.

[0080] Please see again Figure 7 , Figure 8 In this embodiment, an upper cylinder body 28 is provided on the top wall of the discharge chamber 19, and the telescopic rod of the upper cylinder body 28 slides downward and penetrates the top wall of the discharge chamber 19, and the upper discharge guide rod 29 is insulated and connected to the free end of the telescopic rod of the upper cylinder body 28; a mounting plate 15 is connected between the two side plates 11, and a lower cylinder body 32 is provided on the lower surface of the mounting plate 15, and the telescopic rod of the lower cylinder body 32 slides upward and penetrates the mounting plate 15, and the lower discharge guide rod 33 is insulated and connected to the free end of the telescopic rod of the lower cylinder body 32.

[0081] In this way, it is convenient to control and realize the vertical telescopic action of the discharge guide rod. The discharge guide rod is insulated and connected to the free end of the cylinder telescopic rod, and the cylinder telescopic rod can be made of insulating hard material, and the discharge guide rod is fixed at its end. If the cylinder telescopic rod is made of a metal rod, the upper and lower discharge guide rods can be formed into a cylindrical structure with one end open, which is sleeved on the end of the cylinder telescopic rod through the open end, and an insulating plastic sleeve (not shown) is added between the two. When installing, the cylindrical plastic sleeve with one end open is first sleeved on the end of the cylinder telescopic rod, and then the discharge guide rod is sleeved outside the plastic sleeve.

[0082] Among them, a connection hole 21 is opened through the side wall of one side of the discharge chamber 19, and the discharge instrument 36 is installed and connected in the connection hole 21. The inner end of the discharge instrument 36 extends into the discharge chamber 19 and is electrically connected to a rigid upper electrode end 37 and a lower electrode end 38 respectively. The upper electrode end 37 and the lower electrode end 38 are made of conductive metal materials. The upper electrode end 37 extends upward and then horizontally extends to the bottom of the upper discharge guide rod 29. The free end of the upper discharge guide rod 29 slides through the end of the upper electrode end 37 and is conductively connected to the upper electrode end 37.

[0083] The lower electrode terminal 38 extends downward, passes through the through hole on the top plate 12, and extends horizontally to between the top plate 12 (sliding seat 22) and the mounting plate 15. The free end of the lower discharge guide rod 33 slides through the end of the lower electrode terminal 38 and is conductively connected to the lower electrode terminal 38.

[0084] In this way, the structure is more compact and has better integrity; the conductive connection between the discharge guide rod and the electrode end can be that the outer diameter of the discharge guide rod matches the diameter of the inner hole at the end of the electrode end for the discharge guide rod to slide through, and the outer circumferential side wall of the discharge guide rod maintains contact and sliding with the hole wall at the end of the electrode end; or a brush-like spring sheet can be added in the inner hole at the end of the electrode end to maintain conductive contact with the outer circumferential side wall of the discharge guide rod.

[0085] Among them, the outer wall of the upper discharge guide rod 29 protrudes with a circle of upper convex edge 30, and an upper spiral compression spring 31 is compressed (in pre-compression state) between the upper convex edge 30 and the upper electrode end 37; the upper convex edge 30 is above the upper electrode end 37, and the upper spiral compression spring 31 is compressed when the upper discharge guide rod 29 extends downward; the outer wall of the lower discharge guide rod 33 protrudes with a circle of lower convex edge 34, and a lower spiral compression spring 35 is compressed (in pre-compression state) between the lower convex edge 34 and the lower electrode end 38; the lower convex edge 34 is below the lower electrode end 38, and the lower spiral compression spring 35 is compressed when the lower discharge guide rod 33 extends upward.

[0086] In this way, it is beneficial to improve the timeliness of the discharge guide rod's contact and disengagement with the battery when it is retracted, and it can also play the role of positioning / limiting the retracted state; it can be understood that when extended, the helical compression spring will not be compressed before the discharge guide rod is in conductive contact with the battery; that is, when the discharge guide rod is extended and in conductive contact with the battery, the helical compression spring is in the designed normal working compression stroke length state.

[0087] The sliding groove 13 is oval-shaped, and the lower part of the inner wall of the sliding groove 13 has a circle of bosses 14 to form a step. The horizontal cross-sectional shape of the sliding seat 22 is also oval-shaped and the upper and lower widths correspond to the sliding groove 13. The lower surfaces of the two side surfaces or the two side steps are respectively provided with sliding drive motors 27. The sliding drive motor 27 acts on the inner wall of the sliding groove 13 through the output wheel to drive the sliding of the sliding seat 22. The upper surface of the sliding seat 22 extends outward with a circle of square outer edges 26, which are higher than the upper surface of the top plate 12 and play a certain placement and limiting role. The passage opening 20 is rectangular, and its width is greater than the width of the outer edge 26.

[0088] See also Figure 2 The third group of conveying robot devices 6 grabs and takes away the battery after the residual power is released, and sends it to the surface stripping device 4. The surface stripping device 4 requires the battery to be in a horizontal state for stripping processing, so a transition robot arm is set to vertically receive the battery of the third group of conveying robot devices 6, rotate it to put the battery horizontally, and place it on the conveying table. The conveying table slides toward the surface stripping device 4 to the bottom of the guide rail groove of the equipment base, and then transitions the battery to the surface stripping device 4.

[0089] See also Figure 11-Figure 17 The surface peeling device 4 includes a fixed lower base 39, and a liftable upper slide 40 is provided just above the lower base 39; it also includes a cutting mechanism, a clamping mechanism and a peeling mechanism; the cutting mechanism includes two cutting units 44 respectively mounted on the lower base 39 and the upper slide 40, the cutting unit 44 includes a cutting telescopic cylinder 47, the cutting telescopic cylinder 47 is driven to connect the cutting blade 49 through the cutting telescopic rod 48, and the cutting blades 49 of the two cutting units 44 are arranged opposite to each other up and down; the clamping mechanism includes two clamping units 45 respectively mounted on the lower base 39 and the upper slide 40, the clamping unit 45 includes a clamping telescopic cylinder 52, the clamping telescopic cylinder 52 is driven to connect the clamping block 53, and the two clamping units 44 are arranged opposite to each other up and down. The clamping blocks 53 of the unit 45 are arranged opposite to each other in the upper and lower directions; the number of the clamping mechanisms is two sets, and they are respectively arranged on both sides of the cutting mechanism in the width direction of the lower base 39 and the upper slide 40; the stripping mechanism includes two stripping units 46 respectively installed on the lower base 39 and the upper slide 40, and the stripping unit 46 includes a stripping drive motor 54, which drives the stripping scraper 56 connected to the lower base 39 and the upper slide 40 to drive the stripping scraper 56 to slide back and forth in the width direction of the lower base 39 and the upper slide 40, and the stripping scrapers 56 of the two stripping units 46 are arranged opposite to each other in the upper and lower directions; the number of the stripping mechanisms is two sets, and they are respectively arranged on both sides of the cutting mechanism in the width direction of the lower base 39 and the upper slide 40.

[0090] The surface peeling device 4 is specially used to remove and peel off the plastic film on the outer surface of the cylindrical lithium-ion battery. Through the use of the lower base 39 and the upper slide 40, the two sets of clamping mechanisms are constructed to extend and clamp the two ends of the cylindrical lithium battery, the cutting mechanism is constructed to extend and cut off the plastic film on the outer surface of the cylindrical lithium battery from the middle ring, and the stripping mechanism is constructed to move outward along the side to peel off the plastic film after the cutting mechanism and the clamping mechanism on the same side are retracted. In this way, the battery shell and the plastic film are further disassembled to facilitate classification and recycling. Collection boxes 42 are also provided on both sides of the width direction of the lower base 39.

[0091] See also Fig.16 , Fig.18 , wherein the cutting blade 49 is a plate-like semicircular arc, and a semicircular arc-shaped cutting edge is formed on the inner arc surface; the free end of the cutting telescopic rod 48 is connected to the middle part of the cutting blade 49, and the cutting edge is higher than the free end surface of the cutting telescopic rod 48; the stripping scraper 56 is respectively arranged adjacent to each other on both sides of the cutting blade 49, and the clamping block 53 is located on the outside of the stripping scraper 56; the limit stroke of the retraction of the cutting mechanism and the clamping mechanism can make the cutting blade 49 and the clamping block 53 lower than the stripping scraper 56 ("lower than" is for the lower base 39, and for the upper slide 40, because it is retracted upward, it can be understood as not exceeding the stripping scraper 56), wherein the cutting blade 49 of the cutting mechanism can be lower than the top of the stripping scraper 56, and the clamping block 53 of the clamping mechanism needs to be completely lower than the stripping scraper 56 to make way for the stripping scraper 56 to move outward.

[0092] In this way, the cutting blade 49 and its cutting edge are convenient for cutting off the plastic film on the outer surface of the cylindrical lithium battery from the axial middle ring. The outward peeling stroke of the stripping scraper 56 is certain. It is adjacent to the cutting blade 49, which can reduce the distance between the cutting blade 49 and the cutting blade 49 when moving outward to peel off the plastic film, and control the volume of the device. It can be understood that the radial size of the cutting edge of the cutting blade 49 corresponds to or is slightly smaller than the outer diameter of the battery, so that when the upper and lower cutting blades 49 act on the battery, the plastic film can be cut off from the middle.

[0093] Among them, the free end surface of the cutting telescopic rod 48 is recessed with a circumferential groove, and the cutting blade 49 is circumferentially slidably arranged in the circumferential groove. A circular cutting drive motor 51 is arranged in the side wall of the circumferential groove. The circular cutting drive motor 51 is connected to the cutting blade 49 through a drive shaft transmission and drives the cutting blade 49 to slide reciprocatingly in the circumferential groove. During implementation, a coaxial annular waist groove may be vertically penetrated through the plate surface of the cutting blade 49, and a limiting shaft sliding through the annular waist groove is vertically connected to the two side walls of the circumferential groove. The drive shaft of the circular cutting drive motor 51 is transmission-connected to the outer arc surface of the cutting blade 49, and the transmission connection may be a friction transmission or a tooth transmission (that is, there is a circumferential gear on the drive shaft of the circular cutting drive motor 51, and there are outer circumferential teeth on the outer arc surface of the cutting blade 49, and the two teeth are meshed for transmission). Please continue to refer to Fig.16 , Fig.18 In this embodiment, the annular waist groove is formed into a circular cutting drive groove 50, and the driving shaft of the circular cutting drive motor 51 passes through the circular cutting drive groove 50 and is connected in transmission, which can have the functions of both the driving and the limiting shaft, simplifying the structure. Of course, the bottom wall of the circumferential slide groove should be an arc-shaped surface that matches the outer arc-shaped surface of the cutting blade 49.

[0094] In this way, the cutting blade 49 is guaranteed to cut the plastic film from the middle of the battery in a circular cut. If the upper and lower cutting blades 49 act on the battery against each other and fail to effectively cut the plastic film from the middle, the two cutting blades 49 that are clamped on the battery are further driven by the circular cutting drive motor 51 to reciprocate in the circumferential direction to simulate the cutting action, thereby ensuring that the plastic film is cut from the middle of the battery in a circular cut.

[0095] See also Fig.11 , Fig.19 The stripping scraper 56 is plate-shaped and has an arc-shaped action surface for acting on the plastic film on the outer surface of the cylindrical lithium battery. The arc-shaped action surfaces of the two stripping units 46 in the stripping mechanism are arranged opposite to each other up and down; the stripping drive motor 54 drives the stripping scraper 56 through the stripping drive screw 55 to form a screw transmission structure.

[0096] The peeling unit 46 has two peeling drive motors 54, which are respectively arranged on both sides of the clamping mechanism in the width direction perpendicular to the lower base 39 and the upper slide 40, and are jointly driven and connected to a peeling scraper 56 through a one-to-one peeling drive screw 55 to improve the movement stability of the peeling scraper 56.

[0097] When in use, the arc-shaped action surface of the stripping scraper 56 acts on the plastic film on the outer surface of the cylindrical lithium battery, and the contact force is used to scrape and peel outward during the outward movement. In this embodiment, the arc-shaped action surface is also a blade-like surface inclined toward the side of the cutting blade 49, which reduces the contact area and improves the scraping and stripping effect. The stripping scraper 56 is provided with a transverse movement drive unit 58, and the transverse movement drive unit 58 is telescopically driven and connected to a longitudinal cutting blade 57, and the longitudinal cutting blade 57 is constructed to extend above or retract below the arc-shaped action surface. The longitudinal cutting blade 57 is located on the side of the arc-shaped action surface away from the cutting blade 49.

[0098] See also Fig.11 , Fig.17 , wherein the free end surface of the clamping block 53 has an inwardly concave arc surface for clamping the cylindrical lithium battery, and the arc surfaces of the two clamping units 45 in the clamping mechanism are arranged opposite to each other up and down.

[0099] See also Fig.14 , Fig.16 and Fig.17 To facilitate installation, a one-to-one concave cavity corresponding to the cutting mechanism and the clamping mechanism is provided on the opposite surfaces of the lower base 39 and the upper slide 40 to accommodate the cutting mechanism and the clamping mechanism, so as to facilitate matching the high and low process assignment dimensions of the cutting blade 49, the clamping block 53 and the stripping scraper 56.

[0100] For ease of understanding, the feasible method process of the surface peeling device 4 is briefly introduced as follows:

[0101] Place the cylindrical lithium battery horizontally on the conveying platform on the two clamping blocks 53 below; the upper slide 40 moves downward appropriately; the two clamping telescopic cylinders 52 at the upper and lower sides extend to clamp the two ends of the cylindrical lithium battery; the upper and lower cutting telescopic cylinders 47 extend to cut the plastic film from the middle ring through the upper and lower cutting blades 49. During the process, the ring cutting drive motor 51 can drive the cutting blade 49 to reciprocate in the circumferential direction, which is conducive to cutting the plastic film from the middle ring.

[0102] After the middle ring cutting, the upper and lower cutting telescopic cylinders 47 drive the cutting blade 49 to retract. The two clamping telescopic cylinders 52 at the top retract.

[0103] The two clamping telescopic cylinders 52 at the bottom are retracted synchronously, so that the cylindrical lithium battery is horizontally lowered to the two stripping scrapers 56 at the bottom (the two clamping blocks 53 are slightly lower than the stripping scrapers 56 to better maintain the balance of the horizontal state of the cylindrical lithium battery).

[0104] Then, the upper slide 40 moves downward so that the cylindrical lithium battery is confined between the two stripping scrapers 56 at the upper and lower sides respectively.

[0105] The upper and lower clamping telescopic cylinders 52 of the negative terminal of the cylindrical lithium battery extend out and clamp the negative terminal of the cylindrical lithium battery, and the upper and lower clamping telescopic cylinders 52 of the positive terminal of the cylindrical lithium battery retract to make way for the upper and lower stripping scrapers 56 of the positive terminal to move outward to strip the plastic film. After making way, the upper and lower stripping scrapers 56 of the positive terminal move outward, remove and strip half of the plastic film of the positive terminal, and then reset, and the plastic film falls into the collection box 42 on this side.

[0106] The upper and lower clamping telescopic cylinders 52 of the positive terminal of the cylindrical lithium battery extend out and clamp the positive terminal of the cylindrical lithium battery, and the upper and lower clamping telescopic cylinders 52 of the negative terminal of the cylindrical lithium battery retract to make way for the upper and lower stripping scrapers 56 of the negative terminal to move outward to strip the plastic film. After making way, the upper and lower stripping scrapers 56 of the negative terminal move outward, remove and strip half of the plastic film of the negative terminal, and then reset, and the plastic film falls into the collection box 42 on this side.

[0107] The upper slide 40 moves upward to reset, and the two upper clamping and telescopic cylinders 52 retract to return to their original positions; the two lower clamping and telescopic cylinders 52 extend to hold up the battery and return to the initial state, making it convenient to remove the battery and put in the next battery to be peeled off.

[0108] During the removal and peeling process, the transverse movement drive unit 58 can drive the longitudinal cutting blade 57 to extend appropriately. When the peeling scraper 56 moves outward to remove and peel the plastic film, it first cuts it longitudinally to destroy the circumferential integrity of the plastic film, which is beneficial to the axial removal and peeling of the plastic film.

[0109] Of course, the above-mentioned method of use is controlled by a controller and is not restrictive. The stroke and sequence of each action can be adjusted by programming according to actual conditions to successfully complete the peeling of the plastic film on the battery surface.

[0110] See also Figure 20-Figure 29 , the disassembling device 5 comprises:

[0111] A shell cutting mechanism 59, used for cutting the metal shell of the battery;

[0112] The inner core transport mechanism 60 is used to grab the battery inner core after the metal shell is removed and transport it to the inner core disassembly mechanism 61;

[0113] The inner core disassembling mechanism 61 is used to flatten the rolled inner core of the battery, separate the metal layer and the insulating layer of the inner core of the battery and collect them by category.

[0114] See also Fig. 22 , Fig.23The shell cutting mechanism 59 includes a fixed lower base 63, and a liftable cutting upper base 69 is provided just above the lower base 63; a battery horizontal placement platform 64 is provided in the middle of the upper surface of the lower base 63, and a battery clamping boss 70 is provided in the lower surface of the cutting upper base 69. The battery horizontal placement platform 64 and the battery clamping boss 70 are arranged opposite to each other in the vertical direction and are arc surfaces adapted to the outer circumference of the battery. Electromagnets 73 are respectively embedded in the middle of the two arc surfaces opposite to each other; the length extension direction of the battery horizontal placement platform 64 and the battery clamping boss 70 is consistent with that of the lower base 63 and the cutting upper base 69. Corresponding to the width direction of the cutting upper seat 69, the cutting upper seat 69 is connected to a ring-shaped circulating cutting unit 71 which can be raised and lowered. The circulating cutting unit 71 is located at one end of the battery clamping boss 70 and is used to cut the head positive terminal of the metal shell when it descends; the outer side of the circulating cutting unit 71 on the cutting upper seat 69 is provided with a unloading boss 72 which slides along the length direction of the battery clamping boss 70, and the unloading boss 72 is constructed to move the head positive terminal of the metal shell axially outward after it is cut so that it can fall from the horizontal battery placement table 64, and a positive terminal collection box 68 is provided on the corresponding side of the lower base 63.

[0115] A horizontal saw disc unit 65 is horizontally slidably provided on the lower base 63 and is used to cut and separate the outer circumferential side surface of the metal shell of the positive terminal of the cut head and the negative terminal of the bottom surface into halves.

[0116] In this way, by moving the cutting upper seat 69 downward, the battery horizontal placement table 64 and the battery clamping boss 70 can hold the battery together, and the cutting upper seat 69 can be raised and lowered to be connected to the fixed frame (the upper frame fixed relative to the equipment base 62). The circular cutting unit 71 is lowered again to cut off the positive end of the head of the battery metal shell, and the saw disk unit 65 moves according to the designed path to cut the remaining metal shell in half. During implementation, the circular cutting unit 71 can use wire cutting, band saw cutting, etc., without limitation.

[0117] The saw disc unit 65 includes two sets of lateral saw discs 66 and one set of end face saw discs 67. The two sets of lateral saw discs 66 are respectively arranged on both sides of the battery horizontal placement platform 64 and can slide along the length direction of the battery horizontal placement platform 64. The end face saw disc 67 is arranged at one end of the battery horizontal placement platform 64 and can slide along the direction perpendicular to the length of the battery horizontal placement platform 64. The end face saw disc 67 and the circulation cutting unit 71 are respectively located at opposite ends. To facilitate making way, the saw disc unit 65 can be raised and lowered and can slide in the vertical direction with a distance from the battery horizontal placement platform 64.

[0118] See also Fig.24, wherein the lower base 63 is fixed on the equipment base 62, the inner core transport mechanism 60 includes a cross beam 74, the cross beam 74 is horizontally slidably connected to the equipment base 62, the length direction of the cross beam 74 corresponds to the length direction of the battery horizontal placement table 64, the cross beam 74 is slidably connected to two telescopic cylinders along its length direction, the telescopic cylinders are telescopically connected to the grabbing plates 75 downward, the two grabbing plates 75 are respectively located at both ends of the cross beam 74 and are arranged parallel to each other, the inner side surface of the grabbing plates 75 is rotated with grabbing plates 76 parallel to it, the grabbing plates 76 on the inner sides of the two grabbing plates 75 are relatively to grab the battery inner core from both ends with the grabbing plates 75 moving towards each other; the grabbing plates 75 are provided with a flattening motor 77 for driving the grabbing plates 76 to rotate. The heights of the cross beam 74, the grabbing plates 75, and the grabbing plates 76 are adapted to the battery horizontal placement table 64, and the inner core transport mechanism 60 slides horizontally between the shell cutting mechanism 59 and the inner core disassembling mechanism 61. The inner side of the grabbing plate 76 is provided with a plurality of protruding needles for temperature grabbing the rolled battery core after the metal shell is removed.

[0119] See also Fig.25 , Fig.26 The inner core disassembling mechanism 61 includes a disassembling base frame 78, one end of the disassembling base frame 78 faces the inner core transporting mechanism 60 and is connected to a passive display plate 79, the other end of the disassembling base frame 78 is formed with an insulating layer output port 80, and both sides of the disassembling base frame 78 are respectively formed with metal layer output ports 81, which can be seen in FIG. Fig.30 The outer end of the passive exhibition plate 79 extends toward the inner core transport mechanism 60 and is constructed to rotate with the grabbing plate 76. The outer end of the rolled battery inner core 104 contacts and is restricted by the outer end of the passive exhibition plate 79, and then extends and unfolds along the passive exhibition plate 79 to its inner end; two conveying roller groups 82 that cooperate with each other up and down are provided between the inner end of the passive exhibition plate 79 and the insulating layer output port 80. The two conveying roller groups 82 receive and clamp the outer end of the battery inner core 104 and are constructed to stop rolling and conveying after conveying the entire unfolded battery inner core 104 to between the two conveying roller groups 82 that cooperate with each other up and down; the conveying roller groups 82 are connected to the disassembly base 78 and can slide left and right along both sides of the disassembly base 78, so that the metal layer and the insulating layer of the battery inner core are layered and misaligned through the reverse sliding of the two conveying roller groups 82, and the metal layer output ports 81 on both sides of the disassembly base 78 are respectively provided with output units 89 for receiving and outputting the metal layer of the battery inner core. During implementation, there are also matching rollers on the upper and lower parts of the passive display plate 79, which can fine-tune the position up and down, and the passive display plate 79 can be rotated to adjust the appropriate inclination angle. Fig.30In the embodiment, the outer end of the rolled battery core 104 contacts and is restricted above the outer end of the passive display plate 79. In practice, even if the outer end of the battery core 104 contacts and is restricted below the outer end of the passive display plate 79, because the metal layer of the battery core has sufficient strength, it can also extend and unfold along the passive display plate 79 to its inner end, and be received by the conveying roller 86, and will not fail to receive due to sagging due to its own weight. Because the process is consistent during mass production of batteries, it is preferred to contact and restrict the outer end of the battery core 104 to the top of the passive display plate 79, and set the orientation of the battery when cutting the metal shell. The output unit 89 can be a gripping mechanism such as a manipulator with recognition function, etc., without specific limitation.

[0120] Among them, the conveying roller group 82 includes a side sliding base 83, on which a plurality of lifting cylinders 84 are arranged at intervals, and the lifting cylinders 84 are telescopically connected to a roller bracket 85, on which a conveying roller 86 is rotatably arranged, and on the roller bracket 85 a roller rotating motor 87 for driving the conveying roller 86 to rotate is arranged, and the plurality of conveying rollers 86 on the two conveying roller groups 82 that cooperate with each other are arranged one by one in the upper and lower directions, and the two ends of the conveying roller 86 are respectively facing the two sides of the disassembly base 78; the side sliding base 83 is slidably connected to the disassembly base 78, and a side sliding motor 88 for driving the side sliding base 83 to slide left and right along the two sides of the disassembly base 78 is arranged between the side sliding base 83 and the disassembly base 78.

[0121] See also Figure 27-Figure 29 In this embodiment, the output unit 89 includes a metal layer transition box 90 disposed on the side of the disassembly base frame 78. The metal layer transition box 90 has a thin plate channel 91. The thin plate channel 91 extends vertically upward and then transitions to a horizontal inlet 92 at the upper end through an arc segment. The horizontal inlet 92 faces the battery core between the two conveying roller groups 82. On the metal layer transition box 90, a plurality of receiving and conveying components 93 are provided along the length direction of the horizontal inlet 92. The plurality of receiving and conveying components 93 are spaced between two adjacent conveying rollers 86 of the conveying roller group 82. The receiving and conveying components 93 include two rollers 95 that cooperate with each other and can be lifted and lowered. The axial direction of the two rollers 95 corresponds to the length direction of the horizontal inlet 92 and is suspended in front of the horizontal inlet 92 through a bracket so as to receive and convey the metal layer of the battery core. In this way, the two rollers 95 can receive and convey the metal layer after misalignment and stratification.

[0122] The receiving and conveying assembly 93 further includes two filter plates 94 that are matched up and down and swingably connected to the metal layer transition box 90. The plate surface of the filter plate 94 is parallel to the axial direction of the roller 95. The free end of the filter plate 94 gradually becomes thinner and extends toward the two conveying roller groups 82 to the front of the two rollers 95. The gap between the free ends of the two filter plates 94 and between the two rollers 95 forms a channel for the metal layer of the battery core to enter the horizontal inlet 92. In this way, by adapting to the conveying roller group 82 and adjusting the height and opening of the gap between the two filter plates 94 in advance, the metal layer can be passed more accurately and the insulating layer can be prevented from entering.

[0123] Among them, a transition roller 96 is provided along the thin plate channel 91 in the metal layer transition box 90, and below the transition roller 96, a retractable positioning nail 97 is provided in the metal layer transition box 90 and is vertically facing the thin plate channel surface. Below the positioning nail 97, a retractable coating scraper 98 is provided in the metal layer transition box 90 and is vertically facing the thin plate channel surface. The coating scraper 98 is connected to the free end of the scraper telescopic cylinder 99, and the scraper telescopic cylinder 99 is vertically slidably connected in the metal layer transition box 90; the positioning nail 97 and the coating scraper 98 are both located in the vertical section of the thin plate channel 91; the end face of the metal layer transition box 90 is connected to the metal layer collection box 100, and the metal layer collection box 100 is provided There is a transverse mechanical gripper 101 sliding along the length direction of the horizontal inlet 92, and the end face of the metal layer transition box 90 is provided with an outlet channel 103 connecting the vertical section of the thin plate channel 91 with the metal layer collection box 100. The transverse mechanical gripper 101 is constructed to move laterally back and forth to grab the metal layer from which the coating has been scraped off in the thin plate channel 91 and put it into the metal layer collection box 100; the metal layer collection box 100 is provided with a pushing piece (not shown in the figure) to push the metal layer grabbed into the metal layer collection box 100 to a side away from the transverse mechanical gripper 101 for the next grabbing; the insulation layer output port 80 of the disassembled base frame 78 is supported by an insulation layer collection box 102.

[0124] When implementing, see Figure 2 , Fig.11 and Fig.21 Because the surface peeling device 4 and the shell cutting mechanism 59 are both in the form of upper and lower matching mechanisms, the batteries are processed horizontally. The adjacent arrangement is such that the lower base 39 of the surface peeling device 4 is also fixed on the equipment base 62, and the upper slide 40 is also lifted and connected to the fixed frame where the cutting upper seat 69 is lifted and connected through the driving cylinder 43. Fig. 20 and Fig.21 For the purpose of distinction, the surface peeling device 4 is not shown on the equipment base 62. Because the guide rail grooves on the equipment base 62 where the inner core transport mechanism 60 is slidably connected are extended to the front and rear to facilitate the process; the movement of the battery from the conveyor table to the surface peeling device 4 can be completed by the inner core transport mechanism 60. Figure 2In the guide groove on the equipment base 62, there are two mechanisms similar to the inner core transport mechanism 60, which are responsible for the transport in sections: the front one is responsible for transporting the battery on the conveyor table to the surface peeling device 4, and the middle one is responsible for transporting the battery after the plastic film is peeled off to the shell cutting mechanism 59. During these two transports, because the battery is still in a complete metal shell state, the two mechanisms only do not need the raised needles on the inner side of the grabbing plate 76 in the inner core transport mechanism 60, and the other functional structural designs are the same; the inner core transport mechanism 60 is still only responsible for the transportation of the battery inner core 104.

[0125] For ease of understanding, the feasible method process of disassembling the device 5 is briefly introduced as follows:

[0126] The previous transport mechanism places the battery horizontally on the battery horizontal placement table 64 according to the designed orientation, the cutting upper seat 69 moves down, the battery clamping boss 70 clamps the battery, and the unloading boss 72 contacts the positive terminal of the head of the battery metal shell at the same time. The circulating cutting unit 71 starts and moves down, cuts off the positive terminal of the head of the battery metal shell and then resets. A gap is provided on the battery horizontal placement table 64 to make way for the circulating cutting unit 71. In order to prevent the cut positive terminal from staying on the battery horizontal placement table 64, the unloading boss 72 moves outward, driving the positive terminal to fall into the positive terminal collection box 68 more easily; the lateral saw disk 66 and the end face saw disk 67 start and cut the remaining battery metal shell into two halves; the electromagnet 73 starts, and the cutting upper seat 69 moves up and takes away The upper part of the battery metal shell exposes the battery core; the core transport mechanism 60 moves to the left along the equipment base 62, the grab plate 75 opens and closes, and the battery core is clamped on the left and right by the grab plate 76; the grab plate 75 moves up, lifts the battery core to step over the lower part of the battery metal shell, and the core transport mechanism 60 moves to the right along the equipment base 62 to an appropriate position, and adapts to the core disassembly mechanism 61; through the unloading manipulator or the blowing unit (not shown in the figure), the electromagnet is powered off, and the upper and lower halves of the metal shell are moved out of the shell cutting mechanism 59 and recovered; the outer end of the passive display plate 79 is close to the battery core, and the flattening motor 77 is started to drive the battery core to rotate, and the outer end of the rolled battery core contacts and is restricted by the outer end of the passive display plate 79, and then along the passive display plate 79 extends to its inner end and unfolds, each roller motor 87 of the two conveying roller groups 82 is started, each lifting cylinder 84 works, and the conveying rollers 86 extend relatively to receive and clamp the outer end of the battery core, and cooperate with the rotation of the flattening motor 77 to convey the entire unfolded battery core to between the two conveying roller groups 82 and then stop rolling and conveying, that is, the stroke length of the conveying roller group 82 is adapted to (not less than) the length of the battery core after unfolding; the side sliding motor 88 is started, and the two conveying roller groups 82 slide in the opposite direction, so that the metal layer and the insulating layer of the battery core are layered and misaligned, and the metal layer is driven laterally to the horizontal inlet 92 direction of the output unit 89 with the sliding of the conveying roller group 82, and the two rollers 95 rotate and move relatively to receive and convey the metal layer, and the filter plate 94 with a good adjustment angle can prevent The insulating layer follows and enters between the two rollers 95. The two rollers 95 feed the metal layer into the thin plate channel 91 and are relayed by the transition roller 96 to the vertical section of the thin plate channel 91. The positioning nails 97 extend out and position the upper end of the metal layer. The coating scraper 98 extends out to abut the metal layer and moves down with the scraper telescopic cylinder 99. After scraping off the coating on the surface of the metal layer, it is reset. The transverse mechanical gripper 101 extends from the outlet channel 103 and grasps the end of the metal layer. The positioning nails 97 retract and return to their original position. The transverse mechanical gripper 101 moves transversely through the metal layer and pulls it into the metal layer collection box 100. The control and debugging are reasonable, and the output units 89 on both sides can respectively recover the positive and negative layers of the metal layer. Then, the conveying rollers 86 continue to convey and feed the insulating layer into the insulating layer collection box 102.

[0127] The method and production line are applicable to cylindrical lithium batteries of models such as 18650, 27000, and 8460, which have the same outer diameter and slightly different heights and can be adapted to universal use by adjusting the stroke of each mechanism. The layout of the production line is not limited. In this embodiment, Figure 2 As shown, in order to increase production capacity and output, the performance testing device 2, the discharge device 3, the transition robot arm (conveyor platform), the surface stripping device 4 and the disassembly device 5 are all in the form of multiple units, independently arranged in rows, and different devices in each row are parallel and spaced apart from each other, and the movement of batteries is coordinated by corresponding three groups of conveying robot devices 6. The first group of conveying robot devices 6 is responsible for the movement of batteries between the appearance testing device 1 and the performance testing device 2 (including removal and crushing), the second group of conveying robot devices 6 is responsible for the movement of batteries between the performance testing device 2 and the discharge device 3 (including removal and downgrading), and the third group of conveying robot devices 6 is responsible for the movement of batteries between the discharge device 3 and the transition robot arm (conveyor platform). Because the devices are arranged horizontally in rows, the conveying guide rails of the conveying robot device 6 can be arranged in a square shape (with arc transition at the corners). The two opposite sides can be adapted to the devices in a row, and the other two sides can be easily moved out. The corresponding adapted placement platform can be placed underneath it. The conveying guide rails are installed and connected to the ceiling of the production workshop or to the hanger dropped from the ceiling, and are suspended above the devices. A downward vertical manipulator is slidably connected to the conveying guide rails. The manipulator can be raised and lowered, and has a free end that can be opened and closed to grab the battery so as to grab the top of the battery for transportation.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for recycling cylindrical lithium batteries, characterized in that: The steps include: 1) Obtain waste cylindrical lithium batteries in batches; 2) Battery appearance inspection; the cylindrical lithium batteries are classified into those with defective appearance and those with intact appearance, and the cylindrical lithium batteries with intact appearance are sent to step 3), and the cylindrical lithium batteries with defective appearance are sent for overall crushing; 3) Battery performance testing; the cylindrical lithium batteries are classified into those that can be downgraded and those to be disassembled, the cylindrical lithium batteries that can be downgraded are taken out for standby use, and the cylindrical lithium batteries to be disassembled are sent to step 4); 4) Battery discharge; 5) The plastic film on the battery surface is peeled off; 6) Battery metal shell cutting; 7) Disassemble the battery core.

2. The cylindrical lithium battery recycling method according to claim 1, characterized in that: The method is implemented based on a battery recycling production line, which includes: An appearance inspection device, used to implement the battery appearance inspection in step 2); A performance testing device, used to implement the battery performance testing in step 3); A discharge device, used to discharge the battery in step 4); A surface peeling device, used to implement the battery surface plastic film peeling in step 5); A disassembly device, used to implement the cutting of the battery metal shell in step 6) and the disassembly of the battery core in step 7); A conveying robot device is used to move cylindrical lithium batteries within a step or / and between steps.

3. The cylindrical lithium battery recycling method according to claim 2, characterized in that: The appearance inspection device comprises a first appearance inspection unit, a second appearance inspection unit and a circulating conveyor belt, and a rotating placement table is provided on the conveyor belt at intervals to vertically hold cylindrical lithium batteries; The first shape detection unit is arranged beside the conveyor belt and is used for shape detection of the top end surface and upper circumferential side surface of the cylindrical lithium battery. If the cylindrical lithium battery is intact in shape, it will be lifted out of the rotating placement table by the conveying robot device and moved to the second shape detection unit. The second shape detection unit is used for shape detection of the bottom end surface and lower circumferential side surface of the cylindrical lithium battery.

4. The cylindrical lithium battery recycling method according to claim 2, characterized in that: The discharge device comprises a discharge platform, the discharge platform is provided with a sliding groove extending along the length direction of the discharge platform, a sliding seat for carrying a battery is slidably matched in the sliding groove; a step hole is vertically penetrated through the sliding seat, the step hole comprises a large hole section and a small hole section below the large hole section so as to vertically carry the battery; The discharge platform comprises two side plates facing each other vertically and a top plate horizontally connected to the upper ends of the two side plates, a sliding groove is provided through the top plate and is located between the two side plates; a hollow discharge chamber is provided on the middle part of the upper surface of the top plate, the inner cavity of the discharge chamber is connected with the sliding groove, the two ends of the sliding groove respectively extend beyond the side walls at the two ends of the discharge chamber, and the side walls at the two ends of the discharge chamber are respectively provided with passage openings corresponding to the two ends of the sliding groove so that the sliding seat carrying the battery can enter and exit; A vertically retractable upper discharge guide rod is provided in the discharge chamber, and a vertically retractable lower discharge guide rod is provided below the top plate. The lower discharge guide rod is located directly below the upper discharge guide rod, and the free end of the lower discharge guide rod is opposite to the free end of the upper discharge guide rod. The upper discharge guide rod and the lower discharge guide rod are electrically connected to the discharge instrument respectively.

5. The method for recycling cylindrical lithium batteries according to claim 2, characterized in that: The surface peeling device comprises a fixed lower base, and a liftable upper slide is arranged just above the lower base; it also comprises a cutting mechanism, a clamping mechanism and a peeling mechanism; the cutting mechanism comprises two cutting units respectively mounted on the lower base and the upper slide, the cutting unit comprises a cutting telescopic cylinder, the cutting telescopic cylinder is driven to connect the cutting blade through the cutting telescopic rod, and the cutting blades of the two cutting units are arranged opposite to each other in the upper and lower directions; The clamping mechanism comprises two clamping units respectively mounted on the lower base and the upper slide, the clamping unit comprises a clamping telescopic cylinder, the clamping telescopic cylinder drives and connects the clamping blocks, and the clamping blocks of the two clamping units are arranged opposite to each other in the upper and lower directions; the number of the clamping mechanism is two sets, and they are respectively arranged on both sides of the cutting mechanism in the width direction of the lower base and the upper slide; The stripping mechanism includes two stripping units respectively installed on the lower base and the upper slide, and the stripping unit includes a stripping drive motor. The stripping drive motor drives the stripping scraper connected and drives the stripping scraper to slide back and forth in the width direction of the lower base and the upper slide. The stripping scrapers of the two stripping units are arranged opposite to each other in the upper and lower directions. The stripping mechanism is in two sets, and they are respectively arranged on both sides of the cutting mechanism in the width direction of the lower base and the upper slide.

6. The method for recycling cylindrical lithium batteries according to claim 5, characterized in that: The cutting blade is in the shape of a plate and a semicircular arc, and a semicircular arc-shaped cutting edge is formed on the inner arc surface; the stripping scrapers are respectively arranged adjacent to each other on both sides of the cutting blade; The stripping scraper is plate-shaped and has an arc-shaped action surface. The arc-shaped action surfaces of the two stripping units in the stripping mechanism are arranged opposite to each other up and down. The stripping drive motor drives the stripping scraper through the stripping drive lead screw to form a lead screw transmission structure. Collection boxes are respectively arranged on both sides of the lower base in the width direction.

7. The method for recycling cylindrical lithium batteries according to claim 2, characterized in that: The disassembling device comprises: A shell cutting mechanism, used for cutting the metal shell of the battery; The inner core transport mechanism is used to grab the battery inner core after the metal shell is removed and transport it to the inner core disassembly mechanism; The inner core disassembling mechanism is used to flatten the rolled inner core of the battery, separate the metal layer and the insulating layer of the inner core of the battery and collect them by category.

8. The method for recycling cylindrical lithium batteries according to claim 7, characterized in that: The shell cutting mechanism comprises a fixed lower base, and a lifting cutting upper base is provided just above the lower base; a battery horizontal placement platform is provided on the middle part of the upper surface of the lower base, and a battery clamping boss is provided on the lower surface of the cutting upper base; the battery horizontal placement platform and the battery clamping boss are arranged opposite to each other in the upper and lower parts, and electromagnets are respectively embedded in the opposite surfaces; A ring-shaped circulating cutting unit is connected to the cutting upper seat in a lifting manner. The circulating cutting unit is located at one end of the battery clamping boss and is used to cut the positive end of the head of the metal shell when descending; A horizontal saw disc unit is horizontally slidably arranged on the lower base and is used for cutting and separating the metal shell of the positive terminal of the cutting head into upper and lower halves.

9. The method for recycling cylindrical lithium batteries according to claim 8, characterized in that: The lower base is fixed on the equipment base, and the inner core transport mechanism includes a crossbeam plate, which is horizontally slidably connected to the equipment base. The length direction of the crossbeam plate corresponds to the length direction of the horizontal battery placement table. Two grabbing plates are slidably connected to the crossbeam plate along its length direction. The grabbing plates are vertically retractable. The two grabbing plates are respectively located at both ends of the crossbeam plate and are arranged parallel to each other. The inner side surfaces of the grabbing plates are rotatably provided with grabbing disks parallel to them. The grabbing disks on the inner sides of the two grabbing plates are relatively able to grab the battery inner core from both ends as the grabbing plates move towards each other; a flattening motor is provided on the grabbing plates to drive the grabbing disks to rotate.

10. The method for recycling cylindrical lithium batteries according to claim 9, characterized in that: The inner core disassembling mechanism comprises a disassembling frame, one end of the disassembling frame faces the inner core transporting mechanism and is connected with a passive exhibition board, the other end of the disassembling frame is formed with an insulating layer output port, and both sides of the disassembling frame are respectively formed with metal layer output ports, the outer end of the passive exhibition board extends toward the inner core transporting mechanism and is constructed so that as the grabbing plate rotates, the outer end of the rolled battery inner core contacts and is restricted by the outer end of the passive exhibition board, and then extends and unfolds along the passive exhibition board to its inner end, and two conveying roller groups matched up and down are arranged between the inner end of the passive exhibition board and the insulating layer output port, the two conveying roller groups receive and clamp the outer end of the battery inner core and are constructed so that the entire unfolded battery inner core is conveyed to between the two conveying roller groups matched up and down and then stops rolling and conveying; the conveying roller groups are connected to the disassembling frame and can slide left and right along both sides of the disassembling frame, so that the battery inner core is dislocated in layers through the reverse sliding of the two conveying roller groups, and the metal layer output ports on both sides of the disassembling frame are respectively provided with output units for receiving and outputting the metal layer of the battery inner core; An insulation layer collection box is provided outside the insulation layer output port of the disassembled base frame.

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