A separation process for a power battery core

Abstract

The present invention discloses a separation process for a power battery core, belonging to the field of waste lithium-ion power battery treatment. The process includes the following steps: S1. Cut the outermost film of the core in the middle and unfold the cut film to both sides; S2. Identify the winding direction of the core; S3. Clamp the core and reverse-wind the core according to the winding direction obtained in step S2; S4. Separate the positive electrode sheet, separator, and negative electrode sheet of the core during the reverse-winding process of the core. Among them, the specific operation of step S3 is to press and limit the unfolded film on one side, and at the same time, push the core horizontally from the same side. According to whether the core is pushed, judge the winding direction of the core. The separation process of the present invention can not only achieve the refined disassembly of the core, providing a basis for improving the utilization rate of the electrode sheets in the subsequent process; at the same time, it can effectively prevent the breakage of each material caused by the wrong reverse-winding direction during the reverse-winding process.

Description

Technical Field

[0001] The present invention belongs to the field of processing of waste lithium-ion power batteries, and more specifically, relates to a separation process for a power battery core. Background Art

[0002] Under the background of the high growth of production and sales of new energy vehicles, the installed capacity of power batteries continues to rise, and the scrapping volume of power batteries and energy storage batteries will also increase rapidly in the next few years. In addition, driven by the dual factors of the environmental risk of waste batteries and the policy dividend period, the power battery recycling industry will see a large-scale increase in volume.

[0003] At present, for the recycling pretreatment of waste square batteries, physical crushing is mostly used. This method has the defects of mechanical entrainment loss and difficulty in completely separating and recycling metals. Therefore, there is a need in the market for a refined disassembly method to separate the housing, the positive electrode, the negative electrode, and the separator to improve the extraction rate of various materials.

[0004] After retrieval, a patent application with the application number 202011422671.9 discloses a power lithium battery classification recycling device and a classification recycling method. This application includes a frame body, a collection unit disposed on the frame body for collecting images of single batteries or cores, a grasping unit movably connected to the top surface of the frame body, a winding unit, a collection unit, and a control unit. Although this application can achieve the classification recycling of the positive electrode, negative electrode, and separator materials by intelligently and mechanically controlling the reverse winding of the core and other materials, in this application, there is a lack of discrimination of the winding direction of the core itself, and in the subsequent reverse winding process, the winding direction may be incorrect, resulting in the fracture of various materials. Summary of the Invention

[0005] 1. Problems to be Solved

[0006] In view of at least some of the above problems existing in the prior art, the present invention provides a separation process for a power battery core. By adopting the technical solution of the present invention, not only can the refined disassembly of the core be completed, providing a basis for improving the utilization rate of the electrode sheets in the subsequent process, but also the fracture of the core caused by the misalignment of the winding direction can be effectively prevented.

[0007] 2. Technical Solutions

[0008] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0009] A separation process for a power battery core according to the present invention is characterized by comprising the following steps:

[0010] S1. Cut the outermost film of the core from the middle and unfold the cut film to both sides;

[0011] S2. Discriminate the winding direction of the core;

[0012] S3. Clamp the core and unwind the core reversely according to the winding direction of the core obtained in step S2.

[0013] S4. During the reverse unwinding of the core, separate the positive electrode sheet, separator, and negative electrode sheet of the core.

[0014] Among them, the specific operation of step S3 is to press and limit the unfolded side film. At the same time, push the core horizontally from the same side, and judge the winding direction of the core according to whether the core is pushed.

[0015] Furthermore, the specific operation of step S4 is as follows:

[0016] a. The end of the core drops and passes through the first pair of roller assemblies, which clamp and synchronously convey it downward. At this time, the first adsorbent adsorbs the positive electrode sheet, so that the positive electrode sheet is separated from the other three layers of the core.

[0017] b. The other three layers of the core continue to move downward and pass through the second pair of roller assemblies, which clamp the three-layer core and continue to convey it downward.

[0018] c. Then, the second adsorbent adsorbs the separators on both sides and rewinds them, so that the separator is separated from the negative electrode sheet.

[0019] d. The separated positive electrode sheet and negative electrode sheet fall into the corresponding recovery bins under the action of gravity. After the rewound separator is cut, it falls into the corresponding recovery bin.

[0020] Furthermore, before the second adsorbent adsorbs the separator, the second pair of roller assemblies drives the three-layer core to move a certain distance away from the first adsorbent.

[0021] Furthermore, in step S1, the cutting mechanism and the blowing mechanism are used to complete the cutting and unfolding operations of the film. Among them, the cutting mechanism includes a hot cutting knife and a first pressing plate. When the core is conveyed under the cutting mechanism, the first pressing plate and the hot cutting knife move downward at the same time. The first pressing plate presses down on the core, and after the hot cutting knife cuts the film in the middle, the first pressing plate peels off and unfolds one side of the film. Then, the blowing mechanism unfolds the other side of the film.

[0022] Furthermore, the blowing mechanism uses an air knife, which blows laterally from the cut of the separator, and stops blowing when the corresponding separator is unfolded.

[0023] Furthermore, in step S2, a direction discrimination mechanism is used to discriminate the winding direction of the core. The direction discrimination mechanism includes a lifting platform, a second pressing plate, and a first pushing plate. Among them, the lifting platform drives the second pressing plate and the first pushing plate to move up and down, and the horizontal pushing cylinder drives the first pushing plate to move horizontally.

[0024] Further, in step S3, a clamping mechanism is used to clamp and reverse-wind the core. The clamping mechanism includes a first connecting plate and two second connecting plates slidably mounted on the first connecting plate. Wherein, clamping members are provided on the opposite sides of the two second connecting plates.

[0025] Further, the second adsorbing member is connected to a winding assembly. The winding assembly includes a first gear and a second gear that mesh with each other. Wherein, the second adsorbing member is connected to the second gear, and the first gear is connected to a driving member.

[0026] Further, the winding assembly further includes a cutter, and the cutter cuts along the axis of the second adsorbing member.

[0027] Further, the first adsorbing member is a suction cup, and the second adsorbing member is a negative pressure winding rod. The negative pressure winding rod is connected to a gas source, and a plurality of adsorption holes are provided on the negative pressure winding rod.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] (1) For the separation process of the power battery core of the present invention, through cutting, unfolding, direction discrimination, reverse winding, and separation operations in sequence, not only can the refined disassembly of the core be realized, providing a basis for improving the utilization rate of the electrode sheets in the subsequent process; at the same time, by discriminating the direction of the core before separation, it is possible to effectively prevent the breakage of various materials caused by incorrect reverse winding directions during the reverse winding process.

[0031] (2) For the separation process of the power battery core of the present invention, the second pressing plate presses and limits the film on one side, and then the horizontal pushing cylinder drives the first push plate to gently push from the end of the core. According to whether the core is pushed or whether the first push plate is fully pushed in place, the winding direction of the core can be judged.

[0032] (3) For the separation process of the power battery core of the present invention, the hot cutter and the first pressing plate move downward. The first pressing plate moves the core downward. After the hot cutter cuts the film from the middle, the hot cutter moves upward, and the first pressing plate remains in contact. As the core is conveyed forward, the first pressing plate peels off and unfolds the film on one side, and then the air knife blows the film on the other side laterally, so that the cut film unfolds to both sides; at the same time, using a hot cutter can conveniently adjust the cutting temperature to adapt to the cutting of films in different environments and different materials, and will not cause damage to the internal core.

[0033] (4) A separation process for the battery cell core of the present invention. The free end of the cell core passes through the first pair of roller assemblies, which clamp and synchronously convey it downward. At this time, the first adsorbent adsorbs the positive electrode sheet, separating the positive electrode sheet from the other three layers of the cell core. Then, the other three layers of the cell core continue to move downward and pass through the second pair of roller assemblies, which clamp the three-layer cell core and continue to convey it downward. Subsequently, the second adsorbent adsorbs the diaphragms on both sides, thereby separating the diaphragms from the negative electrode sheet, and finally completing the separation of the positive electrode sheet, diaphragms, and negative electrode sheet. Description of the Drawings

[0034] Figure 1 is a schematic structural diagram of the cell core in the present invention;

[0035] Figure 2 is a schematic overall structural diagram of the separation device of the present invention;

[0036] Figure 3 is a schematic structural diagram of the cutting mechanism in the present invention;

[0037] Figure 4 is a schematic unfolding diagram of the thin film in the present invention. Among them, a is a schematic single-sided unfolding diagram, and b is a schematic double-sided unfolding diagram;

[0038] Figure 5 is a schematic winding diagram of the cell core in the present invention. Among them, a is counterclockwise winding, and b is clockwise winding;

[0039] Figure 6 is a schematic structural diagram of the direction discrimination mechanism in the present invention;

[0040] Figure 7 is a schematic structural diagram of the clamping mechanism in the present invention;

[0041] Figure 8 is a schematic structural diagram of the separation mechanism in the present invention;

[0042] Figure 9 is a schematic structural diagram of the winding assembly in the present invention;

[0043] Figure 10 is a schematic structural diagram of the pushing mechanism in the present invention. Among them, a is a schematic forward state diagram, and b is a schematic backward state diagram.

[0044] In the figure: 1. Cell core; 11. Thin film; 12. Positive electrode sheet; 13. Diaphragm; 14. Negative electrode sheet;

[0045] 2. Cutting mechanism; 21. Hot cutting knife; 22. First pressing plate; 3. Blowing mechanism;

[0046] 4. Direction discrimination mechanism; 41. Lifting platform; 42. Second pressing plate; 43. First pushing plate;

[0047] 5. Clamping mechanism; 51. First connecting plate; 52. Second connecting plate; 53. Clamping part;

[0048] 6. Separating mechanism; 61. First pair of roller assemblies; 62. First adsorbing part; 63. Second pair of roller assemblies; 64. Second adsorbing part; 65. Winding and unwinding assembly; 651. First gear; 652. Second gear; 653. Cutter;

[0049] 7. Pushing mechanism; 71. Moving plate; 72. Second pushing plate. Specific implementation mode

[0050] The present invention will be further described below in conjunction with specific embodiments.

[0051] Embodiment 1

[0052] Refer to Figure 1 As shown, it is a schematic structural diagram of the core 1 in this embodiment. The shown core 1 is wound by stacking a positive electrode sheet 12, a separator 13, a negative electrode sheet 14, and a separator 13 in sequence. Of course, after the winding is completed, there is also a layer of protective film 11 on the outermost side ( Figure 1 not shown in the figure). The separation process of this embodiment is to separate the positive electrode sheet 12, the separator 13, and the negative electrode sheet 14 respectively to prepare for the extraction of various materials in the later stage.

[0053] A separation process of a power battery core in this embodiment mainly includes the following steps

[0054] S1. Cut the outermost film 11 of the core 1 from the middle and unfold the cut film 11 to both sides;

[0055] S2. Identify the winding direction of the core 1;

[0056] S3. Clamp the core 1 and unwind the core 1 reversely according to the winding direction of the core obtained in step S2;

[0057] S4. Separate the positive electrode sheet 12, the separator 13, and the negative electrode sheet 14 of the core 1 during the reverse unwinding process of the core 1;

[0058] Among them, in step S1, the cutting operation of the film 11 is performed by a hot cutter 21. The hot cutter 21 itself can adjust the temperature to ensure that the film 11 of different materials can be cut normally in different environments without damaging the internal electrode sheets.

[0059] Refer to Figure 4As shown in the figure, the specific operation steps are as follows: When the core 1 is conveyed to this station, the first pressing plate 22 and the hot cutting knife 21 move downward simultaneously. Among them, the first pressing plate 22 positions the core 1, and the hot cutting knife 21 cuts the film 11. After the cutting is completed, the hot cutting knife 21 moves upward to reset, and the first pressing plate 22 remains in contact with the cut film 11. At this time, the core 1 continues to be conveyed forward. The first pressing plate 22 peels off and unfolds the rear half of the film, and then the blowing mechanism 3 unfolds the front half of the film. The blowing mechanism 3 is preferably an air knife, which blows air at a certain inclination angle to lift and unfold the front half of the film. It should be noted that when the front half of the film is lifted but the air has not reached the rear half of the film, the blowing stops to prevent interference with the already unfolded rear half of the film. Here, the front and rear are based on the conveying direction of the core 1. The film located in the front is the front half of the film, and the film located in the rear is the rear half of the film.

[0060] The specific operation of step S2 is to press and limit one side of the unfolded film 11, and at the same time, push the core 1 horizontally from the same side. According to whether the core 1 is pushed, the winding direction of the core 1 is judged. Referring to Figure 5 As shown in the figure, first press the film 11 on the left side of the core 1, and at the same time push the core 1 horizontally from the left side. If the core 1 is pushed, it means that the core is wound counterclockwise, and reference can be made to Figure 5 a; if the core 1 is not pushed, it means that the core 1 is wound clockwise, and reference can be made to Figure 5 b. It should be noted that the horizontal pushing force here should not be too large to prevent damage or even tearing of the core 1 and the film 11. Or the winding direction of the core 1 can also be judged by whether the first push plate 43 is fully extended. In addition, the winding direction of the core 1 here refers to the winding direction of the core 1 in a fixed placement position.

[0061] The specific operation of step S4 is as follows: a. The free end of the core 1 passes through the first pair of rollers 61, and is clamped and synchronously conveyed downward by the first pair of rollers 61. At this time, the first adsorbent 62 adsorbs the positive electrode sheet 12, so that the positive electrode sheet 12 is separated from the other three layers of the core 1;

[0062] b. The other three layers of the core 1 continue to move downward and pass through the second pair of rollers 63. The second pair of rollers 63 drives the three-layer core 1 to move away from the first adsorbent 62 and continue to be conveyed downward;

[0063] c. Then, the second adsorbent 64 adsorbs the diaphragms 13 on both sides and rewinds them, so that the diaphragms 13 are separated from the negative electrode sheets 14;

[0064] d. The separated positive electrode sheets 12 and negative electrode sheets 14 naturally fall into the recycling box under the action of gravity. After the rewound diaphragms 13 are cut, they fall into the recycling box.

[0065] A separation process for a power battery core in this embodiment can not only achieve fine disassembly of the core 1 through the above steps, providing a basis for improving the utilization rate of the electrode sheet in the subsequent process; at the same time, by identifying the direction of the core 1 before separation, it can effectively prevent the fracture of various materials caused by incorrect reverse winding direction during the reverse winding process.

[0066] Embodiment 2

[0067] A separation device for a power battery core in this embodiment can be used to complete each step of the separation process in Embodiment 1.

[0068] Reference Figure 2 As shown, the separation device includes a cutting mechanism 2, a blowing mechanism 3, a direction identification mechanism 4, a clamping mechanism 5, and a separation mechanism 6. Among them, the cutting mechanism 2 is used to perform cutting operations on the outermost film 11 of the core 1 and simultaneously unfold one side of the cut film 11; the blowing mechanism 3 is used to unfold the other side of the film 11; the direction identification mechanism 4 is used to identify the winding direction of the cut core 1; the clamping mechanism 5 is used to clamp the identified core 1 above the separation mechanism 6 and perform reverse winding on the core 1 according to its winding direction; the separation mechanism 6 is used to separate and recycle the separator 13 and the electrode sheet of the reversely wound core 1.

[0069] Specifically, as shown in the reference Figure 3 As shown, the cutting mechanism 2 is installed above the conveyor belt through a bracket, and the height between the cutting mechanism 2 and the bracket can be precisely adjusted through a servo motor plus a lead screw nut structure to adapt to cores 1 of different thicknesses. The cutting mechanism 2 includes a hot cutting knife 21 and a first pressing plate 22. Among them, the hot cutting knife 21 is independently connected to a lifting cylinder for its lifting. The hot cutting knife 21 uses the high temperature of the blade to melt the film 11 with a lower melting point, so that the film 11 is cut off, and at the same time, it will not affect the internal electrode sheet. The blowing mechanism 3 includes an air knife, which spans above the conveyor belt, and the air knife blows air at a certain inclination angle on the film cutting position.

[0070] During operation, the hot cutting knife 21 and the first pressing plate 22 descend to the specified height. Among them, the first pressing plate 22 presses down and positions the core 1, and the hot cutting knife 21 cuts the film 11 from the middle of the core 1. After cutting, the hot cutting knife 21 moves up and resets, and the first pressing plate 22 remains in contact with the cut film 11. At this time, the core 1 continues to be conveyed forward, and one side of the film is peeled off and unfolded by the first pressing plate 22, and then the other side of the film is unfolded by the air knife. The first pressing plate 22 is preferably made of rubber material to increase the friction force with the film 11. At the same time, the first pressing plate 22 lightly presses the film 11 to ensure that the friction force between the two can drive the film 11 to unfold.

[0071] As shown Figure 6 in the figure, the direction discrimination mechanism 4 includes a lifting table 41, a second pressing plate 42 and a first pushing plate 43. Among them, the lifting table 41 is arranged on the frame through a guide rod, and both the second pressing plate 42 and the first pushing plate 43 are connected to the lifting table 41. The free end of the first pushing plate 43 is higher than the free end of the second pressing plate 42, and the first pushing plate 43 is also connected with a horizontal pushing cylinder. Preferably, the second pressing plate 42 and the first pushing plate 43 are slidably connected to the lifting table 41 through connecting sliders to facilitate the adjustment of the pressing position. Among them, the lifting movement of the lifting table 41 and the horizontal movement of the connecting slider are both driven by their respective driving parts.

[0072] During operation, the lifting table 41 drives the second pressing plate 42 and the first pushing plate 43 to move downward. The second pressing plate 42 presses and limits one side of the film 11, and then the horizontal pushing cylinder drives the first pushing plate 43 to gently push from the end of the core 1. According to whether the core 1 is pushed or whether the first pushing plate 43 is completely pushed in place, the winding direction of the core 1 is judged.

[0073] As shown Figure 7 in the figure, the clamping mechanism 5 includes a first connecting plate 51 and two second connecting plates 52 slidably mounted on the first connecting plate 51. Among them, clamping parts 53 are arranged on the opposite sides of the two second connecting plates 52, and the clamping parts 53 are preferably thimble pins. In addition, the two second connecting plates 52 are driven by a driving part to move away from or close to each other; the clamping parts 53 are connected with a rotary cylinder to realize reverse winding of the clamped core 1; at the same time, the entire clamping mechanism 5 can move in two directions, vertical and horizontal, so as to facilitate the clamping of the core 1.

[0074] During operation, the clamping mechanism 5 moves above the core 1 and moves downward, and the second connecting plates 52 approach each other, and the core 1 is clamped from both sides through the thimble pins; then the clamping mechanism 5 drives the clamped core 1 to move above the separating mechanism 6 and drives the core 1 to unwind, and the end of the core 1 is unfolded.

[0075] As shown Figure 8 in the figure, the separating mechanism 6 includes a frame, which is divided into upper, middle and lower layers. Among them, the first pair of roller assemblies 61 are arranged on the top layer, the second pair of roller assemblies 63 are arranged on the middle layer, the second suction members 64 are arranged on the bottom layer, and there are two groups arranged symmetrically; while the first suction member 62 is arranged between the upper layer and the middle layer.

[0076] The first pair of roller assemblies 61 and the second pair of roller assemblies 63 have the same structure, both including a driving roller and a driven roller. Among them, at least one roller in the first pair of roller assemblies 61 can move horizontally to adjust the distance between the two rollers, facilitating the clamping and conveying of the core 1. For the second pair of roller assemblies 63, in addition to the adjustable distance between the two rollers, the entire second pair of roller assemblies 63 needs to be able to move horizontally along the middle frame.

[0077] Specifically in this embodiment, the driving roller is an electric roller, the first adsorbing member 62 is a suction cup, and the second adsorbing member 64 is a negative pressure winding rod. One end of the negative pressure winding rod is connected to a vacuum generator to generate negative pressure, and a plurality of adsorption holes are formed on the negative pressure winding rod.

[0078] The negative pressure winding rod is further connected with a winding assembly 65, as Figure 9 shown. The shown winding assembly 65 includes a cutter 653 and a first gear 651 and a second gear 652 that mesh with each other. Among them, the second adsorbing member 64 is connected to the second gear 652, the first gear 651 is connected with a driving member, and the cutter 653 cuts the diaphragm 13 along the axis of the second adsorbing member 64.

[0079] The working principle and process of the entire separating mechanism 6 are as follows. The unfolded core 1 falls between the two rollers of the first pair of roller assemblies 61, and the two rollers approach each other to clamp and convey the core 1 downward. When the core 1 moves downward to the first adsorbing member 62, the first adsorbing member 62 approaches from the side and adsorbs the positive electrode sheet 12, causing the positive electrode sheet 12 to separate from the other three layers of the core 1. After the separation of the positive electrode sheet 12 is completed, it falls into the corresponding recycling box under its own weight.

[0080] The other three layers of the core 1 continue to move downward under the drive of the first pair of roller assemblies 61. When the core 1 passes through between the second pair of roller assemblies 63, the two rollers of the second pair of roller assemblies 63 approach each other to clamp the core 1. At the same time, the entire second pair of roller assemblies 63 drives the core 1 to move a certain distance in a direction away from the first adsorbing member 62. That is to say, at the beginning, the second pair of roller assemblies 63 is located directly below the first pair of roller assemblies 61 to facilitate the core conveyed down to pass through the second pair of roller assemblies 63 smoothly. When the second pair of roller assemblies 63 clamps the core 1, it needs to move a certain distance to prevent interference with the subsequent separation work.

[0081] As the three-layer core continues to move downward, the second adsorbing member 64 approaches the core 1 from both sides and adsorbs the diaphragms 13 on both sides of the negative electrode sheet 14. At the same time, the second adsorbing member 64 is driven to rotate through gear transmission, so as to rewind the diaphragm 13. At this time, the diaphragms 13 on both sides are separated from the three-layer core, and the remaining negative electrode sheet 14 continues to move downward and finally falls into the corresponding recycling box under its own gravity.

[0082] When the diaphragms 13 on both sides are separated and the winding is completed, the cutter 653 axially cuts the wound diaphragms 13, so that the diaphragms 13 fall off from the second adsorbent 64 and enter their respective recycling bins respectively, and the entire core separation work is completed.

[0083] In addition, a pushing mechanism 7 is further provided between the direction discrimination mechanism 4 and the clamping mechanism 5. As Figure 10 shown, the pushing mechanism 7 includes a moving plate 71 and a second push plate 72. Among them, the end of the second push plate 72 is hinged on the advancing end face of the moving plate 71. This design adopts a non-return structure, that is, when the second push plate 72 pushes the core 1 forward, it can be smoothly pushed; but when the second push plate 72 returns and retreats, the second push plate 72 needs to rotate to cross the next core 1. In this way, the core 1 after direction discrimination can be pushed to the operation platform of the clamping mechanism 5 one by one.

[0084] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Among them, various driving parts and driving methods in this embodiment can adopt the prior art as long as the corresponding functions can be completed. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments to this technical solution without creative work without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A separation process for a power battery core, characterized in that, It includes the following steps: S1. Cut the outermost film (11) of the core (1) from the middle, and unfold the cut film (11) to both sides; S2. Identify the winding direction of the core (1); S3. Clamp the core (1), and unwind the core (1) reversely according to the winding direction of the core obtained in step S2; S4. During the reverse winding of the core (1), separate the positive electrode plate (12), separator (13) and negative electrode plate (14) of the core; Among them, the specific operation of step S2 is to press and limit one side of the unfolded film (11), and at the same time, push the core (1) horizontally from the same side. According to whether the core (1) is pushed, judge the winding direction of the core (1); The specific operation of step S4 is as follows: a. The end of the core (1) drops and passes through the first pair of roller assemblies (61), which are clamped by the first pair of roller assemblies (61) and conveyed downward synchronously. At this time, the first adsorbent (62) adsorbs the positive electrode plate (12) to separate the positive electrode plate (12) from the other three layers of the core (1); b. The other three layers of the core (1) continue to move downward and pass through the second pair of roller assemblies (63), which clamp the three-layer core (1) and continue to convey it downward; c. Then, the second adsorbent (64) adsorbs the separators (13) on both sides and rewinds them, so that the separators (13) are separated from the negative electrode plates (14); d. The separated positive electrode plates (12) and negative electrode plates (14) fall into the corresponding recycling bins under the action of gravity. After the rewound separators (13) are cut, they fall into the corresponding recycling bins.

2. The separation process of a power battery core according to claim 1, characterized in that: Before the second adsorbent (64) adsorbs the separator (13), the second pair of roller assemblies (63) drive the three-layer core (1) to move a certain distance away from the first adsorbent (62).

3. A separation process for a power battery core according to any one of claims 1-2, characterized in that: In step S1, the cutting mechanism (2) and the blowing mechanism (3) are used to complete the cutting and unfolding operations of the film (11). Among them, the cutting mechanism (2) includes a hot cutting knife (21) and a first pressing plate (22). When the core (1) is conveyed under the cutting mechanism (2), the first pressing plate (22) and the hot cutting knife (21) move downward at the same time. The first pressing plate (22) presses down on the core (1). After the hot cutting knife (21) cuts the film (11) from the middle, the first pressing plate (22) peels off and unfolds one side of the film (11); then the blowing mechanism (3) unfolds the other side of the film (11).

4. The separation process of a power battery core according to claim 3, characterized in that, The blowing mechanism (3) uses an air knife, which blows laterally from the cut of the separator (13), and stops blowing when the corresponding separator (13) is unfolded.

5. A separation process for a power battery core according to any one of claims 1-2, characterized in that, In step S2, the direction discrimination mechanism (4) is used to identify the winding direction of the core (1). The direction discrimination mechanism (4) includes a lifting table (41), a second pressing plate (42) and a first pushing plate (43). Among them, the lifting table (41) drives the second pressing plate (42) and the first pushing plate (43) to move up and down, and the horizontal pushing cylinder drives the first pushing plate (43) to move horizontally.

6. The separation process of a power battery core according to claim 5, characterized in that: In step S3, the clamping mechanism (5) is used to clamp and reverse wind the core (1). The clamping mechanism (5) includes a first connecting plate (51) and two second connecting plates (52) slidably mounted on the first connecting plate (51). Clamping members (53) are provided on the opposite sides of the two second connecting plates (52).

7. A separation process for a power battery core according to claim 6, characterized in that: The second adsorbing member (64) is connected to a winding assembly (65). The winding assembly (65) includes a first gear (651) and a second gear (652) that mesh with each other. The second adsorbing member (64) is connected to the second gear (652), and the first gear (651) is connected to a driving member.

8. A separation process for a power battery core, according to claim 7, characterized in that: The winding assembly (65) further includes a cutter (653) that cuts along the axis of the second adsorbing member (64).

9. A separation process for a power battery core according to claim 8, characterized in that: The first adsorbing member (62) is a suction cup, and the second adsorbing member (64) is a negative pressure winding rod. The negative pressure winding rod is connected to a gas source, and a plurality of adsorption holes are provided on the negative pressure winding rod.

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