Battery cell recovery equipment

Abstract

The invention provides battery cell recovery equipment. The battery cell recovery equipment is provided with a separation station, a release station and a recovery station which are arranged in sequence. The battery cell recycling equipment comprises a tail roll separation mechanism which is arranged at a separation station and is used for separating the tail end of a diaphragm of a to-be-recycled wound battery cell so as to obtain a first pretreated battery cell of which the tail end of the diaphragm is separated; the release mechanism is arranged at the release station and is used for releasing the first pretreated battery cell to obtain a second pretreated battery cell with loose pole pieces and diaphragms; the diaphragm recycling mechanism is arranged at the recycling station and is used for winding and recycling a diaphragm of the second pretreated battery cell; and the pole piece recycling mechanism is arranged at the recycling station and is used for recycling the pole piece of the second pretreated battery cell. According to the battery cell recovery equipment, the pole pieces and the diaphragms are completely separated, a plurality of sorting equipment required by the existing process is omitted, the process flow is shortened, the equipment investment is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery recycling, and more specifically, to a battery cell recycling device. Background Art

[0002] In the related art, the disassembly and recycling process of scrapped batteries has a low degree of automation and mainly relies on manual labor. The existing mainstream method of disassembly and recycling is to crush the battery cell as a whole and then sort it. The aluminum powder, copper powder, positive and negative electrode powders obtained after sorting are refined using wet or fire methods. This method will cause the positive and negative electrode materials to mix, the separation cost is high, the recovery rate of important metals is low, and the process flow is long, involving multiple sorting processes, large equipment investment and high energy consumption. Summary of the invention

[0003] The purpose of this application is to provide a new technical solution for battery cell recycling equipment, which can at least solve one of the problems of complex battery cell recycling methods, high separation costs and low recovery rates in the prior art.

[0004] The present application provides a battery cell recycling device, which has a separation station, a loosening station, and a recycling station arranged in sequence, and the battery cell recycling device includes: a tail roll separation mechanism, which is arranged at the separation station, and is used to separate the tail end of the diaphragm of the wound battery cell to be recycled to obtain a first pretreated battery cell with the diaphragm tail end separated; a loosening mechanism, which is arranged at the loosening station, and is used to loosen the first pretreated battery cell to obtain a second pretreated battery cell with loose pole pieces and diaphragms; a diaphragm recovery mechanism, which is arranged at the recycling station and is used to wind and recover the diaphragm of the second pretreated battery cell; a pole piece recovery mechanism, which is arranged at the recycling station and is used to recover the pole pieces of the second pretreated battery cell.

[0005] Optionally, the battery cell recycling equipment also includes: a conveying mechanism, which is used to transport the wound battery cell, the first pretreated battery cell or the second pretreated battery cell between the separation station, the loosening station and the recycling station, and to make the tail end of the diaphragm of the second pretreated battery cell at the recycling station face downward.

[0006] Optionally, the conveying mechanism includes: a first conveying component, which is arranged at the separation station and is used to convey the wound battery cell in a horizontal direction; a second conveying component, which is arranged between the separation station and the loosening station and is used to rotate 90° to convey the first pretreated battery cell; a third conveying component, which is arranged between the loosening station and the recycling station and is used to rotate 180° to convey the second pretreated battery cell.

[0007] Optionally, the first conveying assembly includes: a conveyor belt, which extends in a horizontal direction and is used to convey the wound battery core, and the tail roll separation mechanism is arranged on one side of the conveyor belt.

[0008] Optionally, the second conveying component includes: a carrying jaw, which is rotatable between a first position and a second position, and the rotation angle of the carrying jaw is 90°. When the carrying jaw is in the first position, the carrying jaw obtains the first pre-treated battery cell from the tail roll separation mechanism, and when the carrying jaw is in the second position, the carrying jaw releases the first pre-treated battery cell to the third conveying component.

[0009] Optionally, the third conveying assembly includes: a turntable, which is rotatable around its own axis, and the rotation axis of the turntable is parallel to the axis of rotation of the second conveying assembly; a plurality of carriers, which are arranged on the turntable at intervals along the circumference of the turntable, and the carriers are used to carry the first pre-processed battery cell or the second pre-processed battery cell.

[0010] Optionally, the tail roll separation mechanism includes: a first base; an adsorption member, which is arranged on the first base, and is used to adsorb the diaphragm at the tail of the wound battery cell to form a gap between the outermost diaphragm and the remaining diaphragms; a diaphragm pin, which is movably arranged on the first base, and is used to insert the diaphragm pin into the gap and lift up the outermost diaphragm; a cutter, which is movably arranged on the first base, and is used to cut off the outermost diaphragm.

[0011] Optionally, the loosening mechanism includes: an inner hole pin assembly, which is used to be inserted into the first pre-processed battery cell; and a loosening jaw, which is used to press the first pre-processed battery cell into a round or oval shape.

[0012] Optionally, the diaphragm recovery mechanism includes: a diaphragm starting adsorption assembly, which is used to adsorb the outermost diaphragm of the second pretreated battery cell; a diaphragm starting jaw, which is used to clamp the diaphragm adsorbed by the diaphragm starting adsorption assembly and transport it; and a winding assembly, which receives the diaphragm from the diaphragm winding jaw and winds it up.

[0013] Optionally, the winding assembly includes: a second base; a winding adsorption rod, which is rotatably disposed on the second base around its own axis, and the winding adsorption rod is used to adsorb and wind the diaphragm; a winding drive component, which is connected to the winding adsorption rod and drives the winding adsorption rod; a diaphragm rejection component, which is disposed at one end of the winding adsorption rod close to the second base; and a rejection drive component, which is connected to the winding adsorption rod and drives the winding adsorption rod to move along its own axial direction to cooperate with the diaphragm rejection component to reject the diaphragm wound on the winding adsorption rod.

[0014] Optionally, the electrode sheet recovery mechanism includes: a negative electrode clamping roller, which is used to clamp and guide the negative electrode sheet; a positive electrode clamping roller, which is used to clamp and guide the positive electrode sheet, and the diaphragm recovery mechanism 30 is located between the negative electrode clamping roller and the positive electrode clamping roller; and a electrode sheet guide assembly, which is arranged between the diaphragm recovery mechanism and the positive electrode clamping roller and is used to guide the positive electrode sheet to the positive electrode clamping roller.

[0015] Optionally, the negative electrode clamping roller and the positive electrode clamping roller respectively include: a driving roller and a driven roller, the driving roller and the driven roller are arranged in parallel, and the driven roller can approach or move away from the driving roller along its own radial direction.

[0016] Optionally, the battery cell recycling equipment also includes a negative electrode collecting box, a diaphragm collecting box and a positive electrode collecting box which are arranged in sequence along the horizontal direction, the negative electrode collecting box is located at the bottom side of the negative electrode clamping roller to recover the negative electrode sheet, the positive electrode collecting box is located at the bottom side of the positive electrode clamping roller to recover the positive electrode sheet, and the diaphragm collecting box is located at the bottom side of the diaphragm recovery mechanism to recover the diaphragm.

[0017] According to the battery cell recycling equipment of the present application, the tail coil separation mechanism, the loosening mechanism, the diaphragm recovery mechanism 30 and the pole piece recovery mechanism 40 are sequentially arranged according to the arrangement order of the workstations. The tail coil separation mechanism is used to separate the tail end of the diaphragm of the wound battery cell, which is convenient for grabbing the starting end of the diaphragm when the battery cell is subsequently recycled. The loosening mechanism is set to loosen the wound battery cell, so that the pole piece and the diaphragm in the wound battery cell become loose, which is convenient for the subsequent separation of the pole piece and the diaphragm. The diaphragm and the pole piece are then separated and recycled by the diaphragm recovery mechanism and the pole piece recovery mechanism, which not only realizes the automatic disassembly and recycling of the battery cell, improves the recycling efficiency, but also completely separates the pole piece from the diaphragm, which is convenient for the pole piece to enter the subsequent extraction process directly after being crushed, eliminating many sorting equipment required by the existing process, shortening the process flow, reducing equipment investment, and saving energy consumption. At the same time, due to the more thorough separation of impurities in the pole piece, the loss of precious metal elements in the process is reduced, and the extraction rate is also improved.

[0018] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0020] Figure 1 is a schematic diagram of a battery cell recycling device according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a wound battery cell when a battery cell recycling device according to an embodiment of the present application has not separated the tail end of the separator of the wound battery cell;

[0022] Figure 3 is a schematic diagram of a wound battery cell after the tail end of the diaphragm of the wound battery cell is separated by a battery cell recycling device according to an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of a tail roll separation mechanism in a battery cell recycling device according to an embodiment of the present application;

[0024] Figure 5 is a schematic diagram of a diaphragm recovery mechanism in a battery cell recovery device according to an embodiment of the present application;

[0025] Figure 6 It is a schematic diagram of a negative electrode clamping roller in a battery cell recycling device according to an embodiment of the present application.

[0026] Reference numerals

[0027] 100. Battery cell recycling equipment; a. Separation station; b. Loosening station; c. Recycling station;

[0028] 10. Tail roll separation mechanism; 11. First base; 12. Adsorption member; 13. Diaphragm insertion pin; 14. Cutter;

[0029] 20. Release mechanism; 21. Inner hole pin assembly; 22. Release clamping claw;

[0030] 30. Diaphragm recovery mechanism; 31. Diaphragm start adsorption assembly; 32. Diaphragm start clamp; 33. Rewinding assembly; 331. Second base; 332. Rewinding adsorption rod; 333. Rewinding drive member; 334. Diaphragm rejection member; 335. Rejection drive member;

[0031] 40. Pole piece recovery mechanism; 41. Negative electrode clamping roller; 42. Positive electrode clamping roller; 43. Pole piece guide assembly; 44. Active roller; 45. Driven roller;

[0032] 51, first conveying assembly; 511, conveyor belt; 52, second conveying assembly; 521, carrying claw; 53, third conveying assembly; 531, turntable; 532, carrier;

[0033] 60. Negative electrode material collection box; 70. Positive electrode material collection box; 80. Diaphragm material collection box;

[0034] 201, wound battery cell; 202, first pre-treated battery cell; 203, second pre-treated battery cell; 204, separator; 205, tape; 206, starting end; 207, negative electrode sheet; 208, positive electrode sheet. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] The battery cell recycling device 100 according to an embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0041] like Figures 1 to 6 As shown, the battery cell recycling equipment 100 according to the embodiment of the present application has a separation station a, a loosening station b, and a recycling station c arranged in sequence, and the battery cell recycling equipment 100 includes: a tail roll separation mechanism 10, a loosening mechanism 20, a diaphragm recovery mechanism 30 and a pole piece recovery mechanism 40.

[0042] Specifically, the tail coil separation mechanism 10 is provided at the separation station a, and the tail coil separation mechanism 10 is used to separate the tail end of the diaphragm 204 of the wound battery cell 201 to be recycled to obtain the first pre-treated battery cell 202 with the tail end of the diaphragm 204 separated. The loosening mechanism 20 is provided at the loosening station b, and the loosening mechanism 20 is used to loosen the first pre-treated battery cell 202 to obtain the second pre-treated battery cell 203 with the pole piece and the diaphragm 204 loose. The diaphragm recovery mechanism 30 is provided at the recovery station c and is used to wind and recover the diaphragm 204 of the second pre-treated battery cell 203. The pole piece recovery mechanism 40 is provided at the recovery station c and is used to recover the pole piece of the second pre-treated battery cell 203.

[0043] In other words, the battery cell recycling device 100 according to the embodiment of the present application is mainly composed of a tail coil separation mechanism 10, a loosening mechanism 20, a diaphragm recovery mechanism 30 and a pole piece recovery mechanism 40, and can efficiently recycle the pole pieces in the wound battery cells 201 to be recycled.

[0044] It should be noted that the wound battery cell 201 may include but is not limited to a cylindrical battery cell wound into a cylindrical shape, and a square battery cell pressed into a rectangular parallelepiped after winding. As long as the battery cell is formed by continuously winding the electrode sheet and the separator 204, it is included in the scope of the wound battery cell 201. Figure 2 As shown, the outermost layer of the wound battery cell 201 is a layer of separator 204 , and the tail end of the separator 204 is fixed to the remaining separators 204 by means of an adhesive tape 205 .

[0045] The battery cell recycling device 100 of the present application mainly includes three stations, namely, a separation station a, a loosening station b and a recycling station c. The wound battery cell 201 can be pre-processed for the first time at the separation station a, then pre-processed for the second time at the loosening station b, and finally the pole piece and the diaphragm 204 can be recycled at the recycling station c.

[0046] Specifically, the separation station a is provided with a tail roll separation mechanism 10, which is used to separate the tail end of the diaphragm 204 of the wound battery cell 201. The separation method may include but is not limited to cutting off the tape 205 at the tail end of the diaphragm 204, removing the tape 205, and cutting off the outermost diaphragm 204. After the tail end of the diaphragm 204 is separated, the starting end 206 of the diaphragm 204 can be formed. The wound battery cell 201 with the tail end of the diaphragm 204 separated can be formed as the first pre-treated battery cell 202.

[0047] The loosening station b is provided with a loosening mechanism 20, which is used to loosen the first pre-treated battery cell 202 to obtain the second pre-treated battery cell 203. In the un-loosened battery cell, the pole piece and the diaphragm 204 are tightly fitted and difficult to separate. After the loosening, the internal structure of the battery cell becomes loose, and the looseness between the pole piece and the diaphragm 204 increases, which facilitates the subsequent separation of the diaphragm 204 and the pole piece. The loosening method may include but is not limited to mechanical force, thermal force, chemical means and the like for loosening.

[0048] The recycling station c is provided with a diaphragm recycling mechanism 30 and a pole piece recycling mechanism 40. The pole piece and the diaphragm 204 in the second pre-processed battery cell 203 are separated and recycled by the pole piece recycling mechanism 40 and the diaphragm recycling mechanism 30 respectively. In the wound battery cell 201, the positive pole piece, the negative pole piece 207 and the diaphragm 204 are stacked and continuously wound. A diaphragm 204 is provided between any adjacent positive pole piece and negative pole piece 207. During recycling, the positive pole piece, the negative pole piece 207 and the diaphragm 204 can be separated and the three can be recycled separately.

[0049] Therefore, according to the battery cell recycling equipment 100 of the present application, the tail roll separation mechanism 10, the loosening mechanism 20, the diaphragm recovery mechanism 30 and the pole piece recovery mechanism 40 are sequentially arranged according to the arrangement order of the workstations. The tail roll separation mechanism 10 is used to separate the tail end of the diaphragm 204 of the wound battery cell 201, so as to facilitate the grabbing of the starting end 206 of the diaphragm 204 when the battery cell is subsequently recycled. The loosening mechanism 20 is provided to loosen the wound battery cell 201, so that the pole piece and the diaphragm 204 in the wound battery cell 201 become loose, so as to facilitate the subsequent separation of the pole piece and the diaphragm 204. Then, the diaphragm recovery mechanism 30 and the pole piece recovery mechanism 40 are used to separate the diaphragm 204 from the pole piece for recovery. This not only realizes the automatic disassembly and recycling of the battery cell and improves the recycling efficiency, but also completely separates the pole piece from the diaphragm 204, so as to facilitate the subsequent extraction process directly after the pole piece is crushed. This eliminates many sorting equipment required by the existing process, shortens the process flow, reduces equipment investment, and saves energy consumption. At the same time, since the impurities in the electrode are separated more thoroughly, the loss of precious metal elements in the process is reduced and the extraction rate is improved.

[0050] In some optional embodiments, the battery cell recycling device 100 may also be equipped with a dust removal device and a purification device to remove dust, waste gas, etc. generated during the entire recycling process.

[0051] According to one embodiment of the present application, the battery cell recycling equipment 100 also includes a conveying mechanism, which is used to transport the wound battery cell 201, the first pretreated battery cell 202 or the second pretreated battery cell 203 between the separation station a, the loosening station b and the recycling station c, and to make the tail end of the diaphragm 204 of the second pretreated battery cell 203 at the recycling station c face downward.

[0052] Specifically, the separation station a, the loosening station b and the recycling station c can be connected by a conveying mechanism. The conveying mechanism can convey the wound battery cell 201 at the separation station a, convey the first pre-treated battery cell 202 from the separation station a to the loosening station b, and convey the second pre-treated battery cell 203 from the loosening station b to the recycling station c.

[0053] The conveying method of the conveying mechanism may include but is not limited to belt conveying, robot conveying and turntable conveying, which is not limited here.

[0054] It should be noted that when the conveying mechanism conveys the second pretreated battery cell 203 to the recycling station c, the tail end of the separated diaphragm 204 on the second pretreated battery cell 203 can face downward, that is, the starting end 206 of the diaphragm 204 can face downward, so that the starting end 206 can be controlled in a suitable position, which is convenient for the diaphragm recycling mechanism 30 to obtain the starting end 206 to extract the diaphragm 204 from the second pretreated battery cell 203, thereby separating the electrode from the diaphragm 204.

[0055] According to some other embodiments of the present application, the conveying mechanism includes a first conveying assembly 51, a second conveying assembly 52 and a third conveying assembly 53. The first conveying assembly 51 is provided at the separation station a and is used to convey the wound battery cell 201 in the horizontal direction. The second conveying assembly 52 is provided between the separation station a and the loosening station b and is used to rotate 90° to convey the first pre-treated battery cell 202. The third conveying assembly 53 is provided between the loosening station b and the recycling station c, and the third conveying assembly 53 is used to rotate 180° to convey the second pre-treated battery cell 203.

[0056] Specifically, the conveying mechanism is mainly composed of three conveying components, namely a first conveying component 51 , a second conveying component 52 and a third conveying component 53 .

[0057] The separation station a is provided with a first conveyor assembly 51, which can convey the wound battery cell 201 in a horizontal direction. The wound battery cell 201 to be recycled can be loaded to one end of the first conveyor assembly 51, and then conveyed to the second conveyor assembly 52 by the first conveyor assembly 51.

[0058] When the wound battery cell 201 is carried on the first conveying assembly 51, the tail end of the separator 204 is located above the wound battery cell 201, and the tape 205 at the tail end is located above the wound battery cell 201. The tail winding separation mechanism 10 can separate the tail end of the separator 204 of the wound battery cell 201 carried on the first conveying assembly 51. The first pre-treated battery cell 202 formed after separation is as follows: Figure 3 As shown, the starting end 206 is located above the first pre-processed battery cell 202 , and the separator 204 at the starting end 206 extends horizontally to the right.

[0059] A second conveying assembly 52 is provided between the separation station a and the loosening station b. The second conveying assembly 52 obtains the first pre-processed battery cell 202 from the first conveying assembly 51 of the separation station a, and then rotates the first pre-processed battery cell 202 by 90° to the loosening station b. After the first pre-processed battery cell 202 is rotated by 90°, the starting end 206 of the diaphragm 204 faces downward.

[0060] A third conveying component 53 is provided between the loosening station b and the recovery station c. The third conveying component 53 obtains the first pretreated battery cell 202 from the second conveying component 52. The first pretreated battery cell 202 is loosened by the loosening mechanism 20 at the loosening station b and forms the second pretreated battery cell 203, and then is rotated 180° by the third conveying component 53 and conveyed to the recovery station c. The third conveying component 53 can ensure that the starting end 206 of the diaphragm 204 of the second pretreated battery cell 203 of the rotating axis is still facing downward, that is, the starting end 206 is facing downward before and after the third conveying component 53 rotates 180°, thereby facilitating the diaphragm recovery mechanism 30 to obtain the starting end 206 to extract the diaphragm 204 from the second pretreated battery cell 203, thereby separating the electrode from the diaphragm 204.

[0061] It should be noted that the starting end 206 facing downward may include but is not limited to vertically downward and inclined downward, which is not limited here.

[0062] In some specific embodiments of the present application, the first conveying assembly 51 includes a conveyor belt 511 , which extends in a horizontal direction and is used to convey the wound battery cells 201 , and the tail roll separation mechanism 10 is disposed on one side of the conveyor belt 511 .

[0063] Specifically, the first conveying assembly 51 is mainly composed of a conveying belt 511, and the conveying belt 511 can extend in the horizontal direction. Figure 1 As shown, the left end of the conveyor belt 511 can be used for loading, and the right end of the conveyor belt 511 can be used for unloading. A tail roll separation mechanism 10 can be provided on one side of the conveyor belt 511. The conveyor belt 511 can pause briefly when conveying the wound battery cell 201 to the tail roll separation mechanism 10. After the tail roll separation mechanism 10 completes the separation of the tail end of the diaphragm 204, the conveyor belt 511 continues to convey the wound battery cell 201. The conveyor belt 511 has the advantage of strong controllability, which is conducive to the realization of automatic recycling of battery cells.

[0064] According to some optional embodiments of the present application, the second conveying component 52 includes a carrying jaw 521, which can rotate between a first position and a second position. The rotation angle of the carrying jaw 521 is 90°. When the carrying jaw 521 is in the first position, the carrying jaw 521 obtains the first pre-treated battery cell 202 from the tail roll separation mechanism 10. When the carrying jaw 521 is in the second position, the carrying jaw 521 releases the first pre-treated battery cell 202 to the third conveying component 53.

[0065] In this embodiment, the transporting clamp 521 can not only complete the transportation of the first pre-processed battery cell 202 between the two workstations, but also adjust the posture of the first pre-processed battery cell 202 so that the starting end 206 extends from the horizontal direction to the vertical direction downward, thereby facilitating the cooperation with the third conveying mechanism to realize the final posture adjustment of the battery cell.

[0066] Specifically, the transporting clamp 521 may include two claws, which can clamp the first pre-processed battery cell 202 from the top and bottom directions at the separation station a, and then the transporting clamp 521 rotates 90° and switches from the first position to the second position, so that the first pre-processed battery cell 202 is transported to the third conveying component 53, and then the two claws are released.

[0067] According to some other embodiments of the present application, the third conveying assembly 53 includes a turntable 531 and a plurality of carriers 532. The turntable 531 is rotatable around its own axis, and the rotation axis of the turntable 531 is parallel to the axis of rotation of the second conveying assembly 52. ​​The plurality of carriers 532 are arranged on the turntable 531 at intervals along the circumference of the turntable 531, and the carriers 532 are used to carry the first pre-processed battery cell 202 or the second pre-processed battery cell 203.

[0068] Specifically, a turntable 531 is provided between the loosening station b and the recovery station c, and the turntable 531 can rotate at least 180°. The rotation axis of the turntable 531 is parallel to the rotation axis of the carrying clamp 521. Optionally, the turntable 531 can rotate 360°, and the axis of the turntable 531 can extend in the horizontal direction.

[0069] A plurality of carriers 532 may be spaced apart on the circumference of the turntable 531, and the carrier 532 may be used to carry the first pre-treated battery cell 202 or the second pre-treated battery cell 203. The transporting jaws 521 transport the first pre-treated battery cell 202 to the carrier 532 at the loosening station b, and the carrier 532 carries the first pre-treated battery cell 202. Then, the loosening mechanism 20 loosens the first pre-treated battery cell 202 on the carrier 532 to obtain the second pre-treated battery cell 203. Then, the turntable 531 rotates 180° to transport the second pre-treated battery cell 203 on the carrier 532 to the recovery station c, and then the diaphragm recovery mechanism 30 obtains the diaphragm 204 of the second pre-treated battery cell 203 on the carrier 532 and recovers it.

[0070] The rotation of the turntable 531 causes the carrier 532 to drive the second pre-processed battery cell 203 to rotate 180°, and the starting ends 206 of the diaphragms 204 of the second pre-processed battery cell 203 are all facing downward.

[0071] In this embodiment, the turntable 531 and the carrier 532 can not only transport the second pretreated battery cell 203 between the loosening station b and the recovery station c, but also adjust the posture of the second pretreated battery cell 203 so that the starting end 206 of the second pretreated battery cell 203 faces downward at the recovery station c, making it convenient for the diaphragm recovery mechanism 30 to obtain the diaphragm 204 through the starting end 206.

[0072] In some specific embodiments of the present application, the tail winding separation mechanism 10 includes: a first base 11, an adsorbent 12, a diaphragm pin 13 and a cutter 14. The adsorbent 12 is provided on the first base 11, and the adsorbent 12 is used to adsorb the diaphragm 204 at the tail of the wound battery cell 201 so as to form a gap between the outermost diaphragm 204 and the remaining diaphragms 204. The diaphragm pin 13 is movably provided on the first base 11, and the diaphragm pin 13 is used to insert into the gap and lift the outermost diaphragm 204. The cutter 14 is movably provided on the first base 11, and the cutter 14 is used to cut off the outermost diaphragm 204.

[0073] Specifically, Figure 4 As shown, the first base 11 can be fixed on one side of the conveyor belt 511. The adsorbent 12, the diaphragm pin 13 and the cutter 14 can be connected to the first base, the diaphragm pin 13 can extend along the width direction of the conveyor belt 511, and the diaphragm pin 13 can at least move along the width direction of the conveyor belt 511, that is, along the axial direction of the battery cell 201 wound on the conveyor belt 511. The cutter 14 can move in the vertical direction.

[0074] Optionally, a groove may be provided on the diaphragm pin 13 , and the groove may extend along the axial direction of the wound battery cell 201 , and the cutter 14 may pass through the groove to cut the diaphragm 204 .

[0075] The separation process at the tail end of the diaphragm 204 is described in detail below.

[0076] Taking the square battery cell as an example, the side with the tape 205 on the wound battery cell 201 on the conveyor belt 511 faces upward, and the cutter 14 is located above the wound battery cell 201. First, the adsorbent 12 can adsorb the tail end of the diaphragm 204, so that the outermost diaphragm 204 is separated from the other diaphragms 204 to form a gap, and the diaphragm pin 13 can be inserted into the gap and lift the tail end of the diaphragm 204. Then the cutter 14 can pass through the cut groove on the diaphragm pin 13 and cut off the diaphragm 204, so that the tail end of the diaphragm 204 forms a new starting end 206, forming a Figure 3 In the structure shown, at this time, the tape 205 and a small portion of the diaphragm 204 can be adhered to the remaining diaphragm 204, and the starting end 206 is disconnected from the tape 205.

[0077] In this embodiment, the adsorbent 12, the diaphragm pin 13 and the cutter 14 cooperate to cut off the cell tape 205 and the diaphragm 204 and create a new starting end 206, which is convenient for subsequently removing the diaphragm 204 from the cell.

[0078] According to some optional embodiments of the present application, the release mechanism 20 includes an inner hole pin assembly 21 and a release jaw 22. The inner hole pin assembly 21 is used to be inserted into the first pre-processed battery cell 202. The release jaw 22 is used to press the first pre-processed battery cell 202 into a round or oval shape.

[0079] Specifically, the inner hole pin assembly 21 can be inserted into the first pre-processed battery cell 202, and then with the assistance of the inner hole pin, the loosening jaws 22 can press the first pre-processed battery cell 202. The second pre-processed battery cell 203 formed after pressing can be cylindrical or elliptical, and it only needs to ensure that the pole piece and the diaphragm 204 are loose. Loosening the pole piece and the diaphragm 204 by pressing has the advantages of simple operation and high efficiency, and has little impact on the battery cell, which is conducive to improving the extraction rate.

[0080] Optionally, the inner hole pin assembly 21 can be arranged on the carrier 532, and the release clamping jaw 22 can have two claws, and the two claws of the release clamping jaw 22 can be spaced apart in the vertical direction. Taking a rectangular battery cell as an example, it can be defined as Figure 2 The left and right directions are the length directions of the battery cells, and the up and down directions are the width directions of the battery cells. When the first pretreated battery cell 202 is at the loosening station b, the length direction of the first pretreated battery cell 202 can be parallel to the vertical direction. Thus, the loosening jaws 22 can clamp and press the battery cell from the upper and lower sides, and press the battery cell with a rectangular cross-section into a circular or elliptical shape.

[0081] According to some other embodiments of the present application, the diaphragm recovery mechanism 30 includes a diaphragm start adsorption assembly 31, a diaphragm start clamp 32 and a winding assembly 33. The diaphragm start adsorption assembly 31 is used to adsorb the outermost diaphragm 204 of the second pre-processed battery cell 203. The diaphragm start clamp 32 is used to clamp the diaphragm 204 adsorbed by the diaphragm start adsorption assembly 31 and transport it. The winding assembly 33 receives the diaphragm 204 from the diaphragm start clamp 32 and winds it up.

[0082] Specifically, the recycling station c can be arranged with a diaphragm start adsorption assembly 31, a diaphragm start clamp 32 and a winding assembly 33. The diaphragm start adsorption assembly 31 can adsorb the start end 206 of the diaphragm 204 from the second pre-processed battery cell 203 on the carrier 532, so that the start end 206 is separated. Then the diaphragm start clamp 32 can clamp the start end 206, and then the diaphragm start adsorption assembly 31 releases the start end 206. Subsequently, the diaphragm start clamp 32 clamps the diaphragm 204 to the winding assembly 33 through the start end 206, and the winding assembly 33 winds up the diaphragm 204. In the process of the diaphragm start clamp 32 transporting the start end 206 of the diaphragm 204, the negative electrode sheet 207 outside the diaphragm 204 is automatically peeled off and recycled by the electrode sheet recovery mechanism 40.

[0083] It should be noted that the wound cell 201 is formed by continuously winding a positive electrode sheet, a negative electrode sheet 207 and two separators 204. For the sake of convenience, the two separators 204 are defined as a first separator and a second separator. In the wound cell 201, the first separator, the negative electrode sheet 207, the second separator and the positive electrode sheet are stacked in sequence. When the tail winding separation mechanism 10 separates the tail end of the separator 204, the two separators 204 are cut off at the same time.

[0084] The number of winding assemblies 33 may be two. The two winding assemblies 33 may be spaced apart in the vertical direction. The membrane start adsorption assembly 31 may respectively absorb the start ends 206 of the upper and lower membrane layers 204, and the membrane start clamping claws 32 may respectively clamp the two start ends 206 to the corresponding winding assemblies 33, and the two winding assemblies 33 may respectively wind up the two membrane layers 204. In the process of the two membrane layers 204 being respectively wound up, the positive electrode sheet between the two membrane layers 204 is automatically peeled off and recovered by the electrode sheet recovery mechanism 40.

[0085] In this embodiment, the diaphragm starting adsorption component 31, the diaphragm starting clamp 32 and the winding component 33 can cooperate to pull the diaphragm 204 out from the second pre-treated battery cell 203, so that the positive electrode sheet and the negative electrode sheet 207 are automatically peeled off from the diaphragm 204. The separation process is simple and efficient with low energy consumption.

[0086] In some specific embodiments of the present application, the winding assembly 33 includes: a second base 331 , a winding adsorption rod 332 , a winding driving member 333 , a diaphragm rejecting member 334 and a rejecting driving member 335 .

[0087] The winding adsorption rod 332 is rotatably arranged on the second base 331 around its own axis, and the winding adsorption rod 332 is used to adsorb and wind the diaphragm 204. The winding driving member 333 is connected to the winding adsorption rod 332 and drives the winding adsorption rod 332. The diaphragm rejecting member 334 is arranged at one end of the winding adsorption rod 332 close to the second base 331. The rejecting driving member 335 is connected to the winding adsorption rod 332 and drives the winding adsorption rod 332 to move along its own axial direction, so as to cooperate with the diaphragm rejecting member 334 to reject the diaphragm 204 wound on the winding adsorption rod 332.

[0088] Specifically, Figure 5 As shown, each winding assembly 33 can be mainly composed of a second base 331, a winding adsorption rod 332, a winding driving member 333, a diaphragm rejecting member 334 and a rejecting driving member 335. Among them, the winding adsorption rod 332, the winding driving member 333, the diaphragm rejecting member 334 and the rejecting driving member 335 can be installed on the second machine base.

[0089] The winding adsorption rod 332 may include a rod portion, and the cross section of each rod portion may be semicircular. The two rod portions may be spaced apart to allow the starting end 206 of the diaphragm 204 to pass through. The winding adsorption rod 332 may adsorb the starting end 206 of the diaphragm 204, and then the winding drive member 333 may drive the winding adsorption rod 332 to rotate around its own axis to wind up the diaphragm 204.

[0090] Optionally, the winding driving member 333 may include a winding motor.

[0091] One end of the winding adsorption rod 332 is connected to the second base 331, and the other end of the winding adsorption rod 332 can be a suspended end. The diaphragm 204 removal component can include a ring, which can be sleeved on the winding adsorption rod 332 and located at one end of the winding adsorption rod 332 close to the second base.

[0092] When the diaphragm 204 in a cell is completely wound, the winding adsorption rod 332 can stop rotating. Then the rejection drive 335 can drive the winding adsorption rod 332 to retract, so that the suspended end of the winding adsorption rod 332 is close to the diaphragm 204 rejection assembly, so that the diaphragm 204 on the winding adsorption rod 332 is peeled off and falls off.

[0093] Optionally, the rejecting driving member 335 may include a cylinder, and a telescopic rod of the cylinder may extend along the axial direction of the winding and adsorption rod 332 .

[0094] In this embodiment, the diaphragm 204 can be rolled up by using the cooperation of the winding adsorption rod 332 and the winding drive member 333, and the diaphragm rejection member 334 and the rejection drive member 335 cooperate with the winding adsorption rod 332 to allow the wound diaphragm 204 to be peeled off from the winding adsorption rod 332, thereby facilitating the collection of the diaphragm 204 and allowing the winding adsorption rod 332 to carry out the next round of winding of the diaphragm 204.

[0095] According to some optional embodiments of the present application, the electrode sheet recovery mechanism 40 includes: a negative electrode clamping roller 41, a positive electrode clamping roller 42 and an electrode sheet guide assembly 43. The negative electrode clamping roller 41 is used to clamp and guide the negative electrode sheet 207. The positive electrode clamping roller 42 is used to clamp and guide the positive electrode sheet, and the diaphragm recovery mechanism 30 is located between the negative electrode clamping roller 41 and the positive electrode clamping roller 42. The electrode sheet guide assembly 43 is provided between the diaphragm recovery mechanism 30 and the positive electrode clamping roller 42, and is used to guide the positive electrode sheet to the positive electrode clamping roller 42.

[0096] Specifically, a negative electrode clamping roller 41 may be provided on the side of the winding assembly 33 close to the third conveying assembly 53, and a positive electrode clamping roller 42 may be provided on the side of the winding assembly 33 away from the third conveying assembly 53. After the negative electrode sheet 207 is automatically peeled off from the diaphragm 204, it may fall into the negative electrode clamping roller 41, and the negative electrode sheet 207 is recovered by the negative electrode clamping roller 41. After the positive electrode sheet is automatically peeled off from the diaphragm 204, it may fall into the positive electrode clamping roller 42, and the positive electrode sheet is recovered by the positive electrode clamping roller 42.

[0097] Since the positive electrode sheet is peeled off from between the two layers of the separator 204, a sheet guide assembly 43 is provided between the positive electrode clamping roller 42 and the winding assembly 33, so that the positive electrode sheet just peeled off can be guided between the positive electrode clamping rollers 42, so that the recovery of the positive electrode sheet, the negative electrode sheet 207 and the separator 204 is completely separated and does not interfere with each other. In addition, by clamping and guiding the corresponding electrode sheet with the positive electrode clamping roller 42 and the negative electrode clamping roller 41, the electrode sheet can be guided to a preset position to prevent the electrode sheet from deviating.

[0098] According to some other embodiments of the present application, the negative electrode clamping roller 41 and the positive electrode clamping roller 42 respectively include a driving roller 44 and a driven roller 45, the driving roller 44 and the driven roller 45 are arranged in parallel, and the driven roller 45 can approach or move away from the driving roller 44 along its own radial direction.

[0099] like Figure 6 As shown, the negative electrode clamping roller 41 and the positive electrode clamping roller 42 are mainly composed of a driving roller 44 and a driven roller 45. The driving roller 44 can be connected to a driving structure and actively rotate under the drive of the driving structure. In addition, the driven roller 45 can approach or move away from the driving roller 44 along its own radial direction.

[0100] When the pole piece falls between the active roller 44 and the driven roller 45, the driven roller 45 moves toward the active roller 44 and clamps the pole piece, and then the active roller 44 starts to rotate, and the driven roller 45 also starts to rotate under the action of friction, thereby driving and guiding the pole piece to the corresponding position.

[0101] In some specific embodiments of the present application, it also includes a negative electrode collecting box 60, a diaphragm collecting box 80 and a positive electrode collecting box 70 which are arranged in sequence along the horizontal direction. The negative electrode collecting box 60 is located at the bottom side of the negative electrode clamping roller 41 to recover the negative electrode sheet 207, the positive electrode collecting box 70 is located at the bottom side of the positive electrode clamping roller 42 to recover the positive electrode sheet, and the diaphragm collecting box 80 is located at the bottom side of the diaphragm recovery mechanism 30 to recover the diaphragm 204.

[0102] Specifically, a negative electrode receiving box 60 may be provided below the negative electrode clamping roller 41, a positive electrode receiving box 70 may be provided below the positive electrode clamping roller 42, and a diaphragm receiving box 80 may be provided below the winding assembly 33. The negative electrode receiving box 60, the diaphragm receiving box 80, and the positive electrode receiving box 70 are sequentially arranged in the horizontal direction, wherein the negative electrode receiving box 60 is arranged near the second pre-processed battery cell 203, and the positive electrode receiving box 70 is arranged away from the second pre-processed battery cell 203.

[0103] The negative electrode clamping roller 41 can drive the negative electrode sheet 207 into the negative electrode receiving box 60 below. The positive electrode clamping roller 42 can drive the positive electrode sheet into the positive electrode receiving box 70 below. After the separator 204 rolled up by the winding assembly 33 is removed, it can fall into the separator receiving box 80 under the action of gravity, thereby achieving complete separation of the positive electrode sheet, the negative electrode sheet 207 and the separator 204.

[0104] In summary, the battery cell recycling equipment 100 of the present application is provided with a tail roll separation mechanism 10, a loosening mechanism 20, a diaphragm recovery mechanism 30 and a pole piece recovery mechanism 40 in sequence according to the arrangement order of the workstations. The tail roll separation mechanism 10 is used to separate the tail end of the diaphragm 204 of the wound battery cell 201, so as to facilitate the grabbing of the starting end 206 of the diaphragm 204 when the battery cell is subsequently recycled. The loosening mechanism 20 is provided to loosen the wound battery cell 201, so that the pole piece and the diaphragm 204 in the wound battery cell 201 become loose, so as to facilitate the subsequent separation of the pole piece and the diaphragm 204. The diaphragm recovery mechanism 30 and the pole piece recovery mechanism 40 are then used to separate the diaphragm 204 from the pole piece for recovery. This not only realizes the automatic disassembly and recycling of the battery cell and improves the recycling efficiency, but also completely separates the pole piece from the diaphragm 204, so as to facilitate the direct entry of the pole piece into the subsequent extraction process after being crushed, thereby eliminating many sorting equipment required by the existing process, shortening the process flow, reducing equipment investment, and saving energy consumption. At the same time, since the impurities in the electrode are separated more thoroughly, the loss of precious metal elements in the process is reduced and the extraction rate is improved.

[0105] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery cell recycling device, characterized in that: The battery cell recycling equipment has a separation station, a loosening station, and a recycling station arranged in sequence, and the battery cell recycling equipment includes: A tail roll separation mechanism, the tail roll separation mechanism is arranged at the separation station, and the tail roll separation mechanism is used to separate the tail end of the diaphragm of the wound battery cell to be recycled to obtain a first pre-treated battery cell with the diaphragm tail end separated; A loosening mechanism, the loosening mechanism is arranged at the loosening station, and the loosening mechanism is used to loosen the first pre-treated battery cell to obtain a second pre-treated battery cell with a loose electrode sheet and a diaphragm; A diaphragm recovery mechanism, which is disposed at the recovery station and is used to wind and recover the diaphragm of the second pre-treated battery cell; A pole piece recovery mechanism is arranged at the recovery station and is used to recover the pole pieces of the second pre-processed battery cell.

2. The battery cell recycling equipment according to claim 1, characterized in that: Also includes: A conveying mechanism is used to convey the wound battery cell, the first pretreated battery cell or the second pretreated battery cell between the separation station, the loosening station and the recycling station, and to make the tail end of the diaphragm of the second pretreated battery cell at the recycling station face downward.

3. The battery cell recycling equipment according to claim 2, characterized in that: The conveying mechanism comprises: A first conveying assembly, which is disposed at the separation station and is used to convey the wound battery core in a horizontal direction; A second conveying assembly, the second conveying assembly is disposed between the separation station and the loosening station and is used to rotate 90 degrees to convey the first pre-treated battery cell; A third conveying assembly is provided between the loosening station and the recycling station, and is used for rotating 180 degrees to convey the second pre-treated battery cell.

4. The battery cell recycling equipment according to claim 3, characterized in that: The first conveying assembly comprises: A conveyor belt extends in a horizontal direction and is used to convey the wound battery core, and the tail coil separation mechanism is arranged on one side of the conveyor belt.

5. The battery cell recycling equipment according to claim 3, characterized in that: The second conveying assembly comprises: A carrying jaw, wherein the carrying jaw is rotatable between a first position and a second position, and the rotation angle of the carrying jaw is 90°. When the carrying jaw is in the first position, the carrying jaw obtains the first pre-treated battery cell from the tail roll separation mechanism. When the carrying jaw is in the second position, the carrying jaw releases the first pre-treated battery cell to the third conveying assembly.

6. The battery cell recycling equipment according to claim 3, characterized in that: The third conveying assembly comprises: A turntable, the turntable is rotatable around its own axis, and the rotation axis of the turntable is parallel to the axis of rotation of the second conveying assembly; A plurality of carriers are arranged on the turntable at intervals along the circumference of the turntable, and the carriers are used to carry the first pre-processed battery cell or the second pre-processed battery cell.

7. The battery cell recycling equipment according to claim 1, characterized in that: The tail roll separation mechanism comprises: First Pedestal; An adsorbing member, the adsorbing member is disposed on the first base, and the adsorbing member is used to adsorb the diaphragm at the tail of the wound battery cell so as to form a gap between the outermost diaphragm and the remaining diaphragms; A diaphragm insertion pin, the diaphragm insertion pin is movably arranged on the first base, and the diaphragm insertion pin is used to be inserted into the gap and lift up the outermost diaphragm; A cutter is movably disposed on the first base, and is used to cut off the outermost layer of the diaphragm.

8. The battery cell recycling equipment according to claim 1, characterized in that: The release mechanism comprises: An inner hole pin assembly, the inner hole pin assembly is used to be inserted into the first pre-processed battery cell; The loosening clamp is used to press the first pre-processed battery cell into a round or oval shape.

9. The battery cell recycling equipment according to claim 1, characterized in that: The diaphragm recovery mechanism comprises: A diaphragm starter adsorption component, wherein the diaphragm starter adsorption component is used to adsorb the outermost diaphragm of the second pre-processed battery cell; A diaphragm starter clamping jaw, the diaphragm starter clamping jaw is used to clamp the diaphragm adsorbed by the diaphragm starter adsorption assembly and transport it; A winding assembly receives the diaphragm from the diaphragm starting jaws and winds it up.

10. The battery cell recycling equipment according to claim 9, characterized in that: The winding assembly comprises: Second Plinth; A winding adsorption rod, the winding adsorption rod is rotatably arranged on the second base around its own axis, and the winding adsorption rod is used to adsorb and wind the diaphragm; A winding drive member, the winding drive member is connected to the winding adsorption rod and drives the winding adsorption rod; A diaphragm rejecting member, the diaphragm rejecting member is arranged at one end of the winding adsorption rod close to the second base; The rejecting driving member is connected to the winding adsorption rod and drives the winding adsorption rod to move along its own axial direction, so as to cooperate with the diaphragm rejecting member to reject the diaphragm wound on the winding adsorption rod.

11. The battery cell recycling equipment according to claim 1, characterized in that: The pole piece recovery mechanism comprises: A negative electrode clamping roller, the negative electrode clamping roller is used to clamp and guide the negative electrode sheet; A positive electrode clamping roller, the positive electrode clamping roller is used to clamp and guide the positive electrode sheet, and the separator recovery mechanism is located between the negative electrode clamping roller and the positive electrode clamping roller; A pole piece guiding assembly is provided between the diaphragm recovery mechanism and the positive electrode clamping roller, and is used for guiding the positive pole piece to the positive electrode clamping roller.

12. The battery cell recycling equipment according to claim 11, characterized in that: The negative electrode clamping roller and the positive electrode clamping roller respectively include: The active roller and the driven roller are arranged in parallel, and the driven roller can approach or move away from the active roller along its radial direction.

13. The battery cell recycling equipment according to claim 11, characterized in that: It also includes a negative electrode collecting box, a diaphragm collecting box and a positive electrode collecting box which are arranged in sequence along the horizontal direction. The negative electrode collecting box is located at the bottom side of the negative electrode clamping roller to recover the negative electrode sheet, the positive electrode collecting box is located at the bottom side of the positive electrode clamping roller to recover the positive electrode sheet, and the diaphragm collecting box is located at the bottom side of the diaphragm recovery mechanism to recover the diaphragm.

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