Laser cutting device for battery recycling and battery recycling method

Abstract

The present invention relates to the field of battery recycling technology, and discloses a laser cutting device for battery recycling and a battery recycling method. The laser cutting device for battery recycling of the present invention comprises a laser, an electric chuck, a frame, and an upper battery device for conveying the recycled battery to the electric chuck; the laser is connected to a laser moving device so that the laser can be raised and lowered and moved laterally; a power slide is provided on the frame; at least one of the power slide and the laser can move longitudinally; the movement path of the laser can pass through the space between four claws when viewed from above; the electric chuck comprises a chuck base and a rotating part, and the rotating part is provided with four claws arranged around a middle hole; the electric chuck is provided with a through middle hole, and a push-out piece that can move longitudinally is provided on the power slide, so that the push-out piece can pass through the middle hole to the space between the four claws. The present invention can realize the automation of recycling battery cutting in a relatively safe manner, and has high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of battery recycling, and in particular to a laser cutting device for battery recycling and a battery recycling method. Background Art

[0002] With the progress and development of society, the demand for energy storage is increasing, and the scale of secondary batteries such as lithium batteries and lead-acid batteries required for energy storage is also increasing. These lithium batteries, lead-acid batteries and other secondary batteries are usually discarded after reaching their life cycle. The random discarding of these discarded secondary batteries will cause damage to the environment. In addition, if these discarded secondary batteries can be recycled, they can also generate objective economic value; therefore, it is necessary to recycle these discarded secondary batteries.

[0003] At present, when recycling secondary batteries such as lithium batteries and lead-acid batteries, the battery shell is usually cut open manually by electric saws, etc., and the objects inside the battery are taken out and sorted, dried, and then further processed. In the step of cutting the battery shell, the method of manually cutting the battery shell by electric saws is time-consuming and laborious, and has low safety. In addition, electric saws and the like are made of metal, and if they encounter batteries that are not fully discharged, they may also cause internal short circuits in the battery, which is low in safety.

[0004] Therefore, if laser is used to cut the battery, the safety risk will be greatly reduced; however, when laser is used for cutting, corresponding clamps are also required to clamp the battery. CN115476051A discloses an intelligent servo electric laser tube cutting four-jaw chuck, which includes a front cover with four slide slots in the left and right directions and the up and down directions, four clamping jaws movably arranged in front of the front cover, a rear cover fixedly connected to the front cover and arranged behind the front cover, a frame as an installation base, a rotating drive mechanism fixedly arranged on the frame for driving the four clamping jaws to rotate, and also includes four sets of clamping drive mechanisms arranged on the front cover for driving the four clamping jaws to clamp and open respectively, a wireless data transmission radio station fixedly arranged on the rear end surface of the front cover or the front end surface of the rear cover for realizing data transmission and communicating with the four sets of clamping drive mechanisms, and a power supply component for connecting the four sets of clamping drive mechanisms and the wireless data transmission radio station to the power supply required for work when in use.

[0005] Although CN115476051A discloses an intelligent servo electric laser tube cutting four-jaw chuck, it does not have a corresponding structure for the field of battery recycling. If it is used in battery recycling, it will encounter difficulties in efficiency and accuracy of the chuck clamping the battery. Summary of the invention

[0006] An object of the present invention is to solve or alleviate the above technical problems.

[0007] The means adopted by the present invention is to provide a laser cutting device for battery recycling, which includes a laser, an electric chuck, a frame and an upper battery device for conveying recycled batteries to the electric chuck; the laser is connected to a laser moving device so that the laser can be raised and lowered and moved laterally; a power slide is arranged on the frame; at least one of the power slide and the laser can move longitudinally; the movement path of the laser can pass through the space between four claws when viewed from above; the electric chuck includes a chuck base and a rotating part, and four claws arranged around a middle hole are arranged on the rotating part; the electric chuck is provided with a through middle hole, and a push-out piece that can move longitudinally is provided on the power slide, so that the push-out piece can pass through the middle hole to the space between the four claws; the frame is provided with blanking holes, and the space between the four claws is completely located between the blanking holes when viewed from above.

[0008] The effect achieved by the present invention is that it can realize the automation of recycling battery cutting in a relatively safe and reliable manner. For an embodiment in which the electric chuck includes a first chuck and a second chuck, the reliability when the jaws of the first chuck and the second chuck are exchanged to clamp the recycling battery can be improved.

[0009] According to a further technical solution, the electric chuck includes a first chuck and a second chuck, at least one of the first chuck and the second chuck can move longitudinally, and the longitudinal movement direction of the first chuck and the longitudinal movement direction of the second chuck are located in the same straight line.

[0010] In this technical solution, the first chuck and the second chuck are exchanged to clamp the battery for recycling, thereby achieving full automation.

[0011] A further technical solution is that when the ejector pushes the battery internals to make them fall from between the four claws of the second chuck to the drop hole, the claws are away from the rotation axis of the rotating part to maintain pressure on the recycled battery. At this time, the ejector pushes the battery internals to make only the battery internals fall from between the four claws of the second chuck, but the two narrow side plates and the wide side plates of the battery side plate are still kept between the four claws. After the battery internals fall from between the four claws of the second chuck to the drop hole, the four claws are moved away from each other and the rotating part is rotated at the same time.

[0012] This technical solution enables the battery top plate, battery bottom plate, battery internals, two battery narrow side plates and battery wide side plates to fall into the drop holes in sequence, facilitating subsequent refined classification and processing.

[0013] According to a further technical solution, a longitudinal cutting gap is provided between two adjacent claws when viewed from above.

[0014] In this technical solution, the laser can form a complete side panel slit with one longitudinal movement cutting, which is highly efficient and can ensure the accuracy of the side panel slit.

[0015] According to a further technical solution, the clamping claws include two narrow clamping claws for clamping the narrow side plates of the battery and two wide clamping claws for clamping the wide side plates of the battery, and the wide clamping claws are provided with bottom plate exposure holes penetrating therethrough.

[0016] In this technical solution, the laser can cut through the exposed hole in the bottom plate to form a wide slit in the bottom plate, which is beneficial to improving efficiency.

[0017] According to a further technical solution, the narrow clamping jaw is provided with a bottom plate positioning body, which can be inserted between the two wide clamping jaws, and a portion of the bottom plate positioning body is located in the exposed hole of the bottom plate when viewed from above.

[0018] This technical solution can ensure that the battery bottom plate is directly opposite to the exposed hole of the bottom plate, and the laser cuts through the exposed hole of the bottom plate to form a wide slit of the bottom plate.

[0019] According to a further technical solution, the narrow claw is fixedly provided with an avoidance connector, and a side positioning body is provided at one end of the avoidance connector away from the narrow claw. The avoidance connector is U-shaped as a whole when viewed from above, and is L-shaped when viewed from the side, and the side positioning body exceeds the wide claw in the longitudinal direction.

[0020] This technical solution can ensure accurate lateral positioning of recycled batteries while ensuring that the laser is not blocked.

[0021] A further technical solution is that the side positioning bodies and the avoidance connecting body of the two narrow claws are rotationally symmetrically arranged around the rotation axis of the rotating part, and the side positioning bodies of the two narrow claws have overlapping parts in height; when the two wide claws clamp the battery side plate, a spacing is arranged between the top end of the side positioning body and the inner end face of the wide claw located opposite to the side positioning body.

[0022] This technical solution can achieve complete cutting of recycled batteries with only one electric chuck, which can save time in switching the electric chuck to clamp the recycled batteries and improve efficiency; it can also ensure accurate longitudinal positioning of the laser and the recycled batteries and improve the longitudinal positioning efficiency of both.

[0023] According to a further technical solution, the inner end face edge of the wide clamping jaw is provided with a laser avoidance chamfer, and / or the side surface of the wide clamping jaw is provided with a laser avoidance groove facing the exposed hole of the bottom plate.

[0024] This technical solution can ensure that the laser is not blocked on the path of cutting to form the side plate slits; it can also ensure that the laser is not blocked on the path of cutting to form the narrow slits of the bottom plate.

[0025] A battery recycling method, comprising the following steps: discharging the battery to a safe voltage to form a battery for recycling;

[0026] Loading the recycled batteries onto the above-mentioned laser cutting device for battery recycling;

[0027] Cut and shell the recycled batteries, and separate the battery contents from the shell;

[0028] Finely classify and collect the battery top plate, battery side plate, battery bottom plate, and battery internals;

[0029] Remove the adhesive tape from the battery contents;

[0030] Sort the contents of the battery;

[0031] Cut the battery internals to prepare for unwinding;

[0032] Unwinding and collecting the positive and negative separators inside the battery to form unwound positive and negative separators;

[0033] Drying the electrolyte on the surface of the unwound positive and negative diaphragms;

[0034] Collect the dried positive electrode, negative electrode and separator separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a three-dimensional schematic diagram of the laser cutting device for battery recycling in the first embodiment. Figure 1 .

[0036] Figure 2 This is a three-dimensional schematic diagram of the laser cutting device for battery recycling in the first embodiment. Figure 2 .

[0037] Figure 3 This is a three-dimensional schematic diagram of the laser cutting device for battery recycling in the first embodiment. Figure 3 .

[0038] Figure 4 1 is a top view of a laser cutting device for battery recycling according to a first embodiment.

[0039] Figure 5 yes Figure 4 Schematic diagram of the AA section.

[0040] Figure 6 It is an enlarged schematic diagram of a battery for recycling.

[0041] Figure 7 yes Figure 4 An enlarged schematic diagram of section B.

[0042] Figure 8 This is a simplified diagram of a recycling battery being clamped by four jaws from the perspective of the electric chuck's axis.

[0043] Fig. 9 This is a three-dimensional schematic diagram of the laser cutting on the recycling battery.

[0044] Fig.10 This is a three-dimensional schematic diagram of the recycled battery after the laser cutting of the recycled battery is completed.

[0045] Fig.11 It is a process flow chart of the battery recycling method.

[0046] Fig.12 4 is a perspective schematic diagram of an electric chuck according to a second embodiment.

[0047] Fig.13 FIG. 1 is a schematic diagram of the electric chuck of the second embodiment viewed along its own axis.

[0048] Fig.14 It is a partial top view of the electric chuck of the second embodiment.

[0049] Fig.15 It is a partial side view schematic diagram of the electric chuck of the second embodiment.

[0050] Designate the drawings in the specification Figure 1 Attached is the abstract.

[0051] Arrow 1 ARR1; Line 1 LINE1; Line 2 LINE2; Line 3 LINE3; Laser 1; Laser moving device 11; Lifting arm 111; Transverse arm 112; Longitudinal arm 113; Electric chuck 2; First chuck 201; Second chuck 202; Claw 21; Narrow claw 211; Wide claw 212; Longitudinal cutting gap 213; Rotating part 22; Middle hole 23; Chuck base 24; Frame 3; Power slide 31; Slide motor 311; Rack 312; Ejector 32; Ejector cylinder 329; Blanking hole 33; Linear guide 39; Avoidance structure 4; Bottom plate positioning Body 41; side positioning body 411; avoidance connecting body 412; bottom plate exposed hole 42; laser avoidance groove 421; laser avoidance chamfer 422; laser slit 7; top plate slit 71; top plate narrow slit 711; top plate wide slit 712; side plate slit 72; bottom plate slit 73; bottom plate narrow slit 731; bottom plate wide slit 732; upper battery device 8; suction cup 81; battery placement rack 82; recycling battery 9; battery top plate 91; terminal 919; battery side plate 92; battery narrow side plate 921; battery wide side plate 922; height difference after rotation 929; battery bottom plate 93; battery internals 99. DETAILED DESCRIPTION

[0052] The specific implementation of the present invention will be described below with reference to the accompanying drawings.

[0053] First embodiment.

[0054] See also Figure 1-5The first embodiment of the battery recycling laser cutting device comprises a laser 1, an electric chuck 2, a frame 3 and an upper battery device 8 for conveying the recycled battery 9 to the electric chuck 2. Figure 1 As shown, the upper battery device 8 can be a suction cup 81 on a five-axis manipulator, or a clamping arm on other motion mechanisms; that is, the upper battery device 8 can transport the recycled battery 9 to the electric chuck 2.

[0055] The laser 1 is a prior art, which usually has a large power and can be used to cut metal, etc. The laser 1 is connected to a laser moving device 11, so that the laser 1 can be raised and lowered, moved laterally and longitudinally. For example, the laser moving device 11 is a three-axis robotic arm, specifically including a longitudinal arm 113, a transverse arm 112 and a lifting arm 111. The laser 1 is arranged on the moving end of the lifting arm 111, the lifting arm 111 is arranged on the moving end of the transverse arm 112, the transverse arm 112 is arranged on the moving end of the longitudinal arm 113, and the longitudinal arm 113 is fixed on the frame 3. The longitudinal arm 113 can also be placed directly on the ground without being connected to the frame 3. It should be noted that, if Figure 4 As shown, vertical displacement refers to Figure 4 The longitudinal movement is the same as the direction of the rotation axis of the rotating part 22 described later. Figure 4 The linear motion in the direction perpendicular to the paper surface is easy to understand that the lifting direction is vertical, that is, in the vertical plane and perpendicular to the rotation axis of the rotating part 22 described later. Figure 4 The linear motion in the up-down direction can be easily understood as the lateral direction, that is, the direction in the horizontal plane and perpendicular to the rotation axis of the rotating part 22 .

[0056] The frame 3 is provided with a power slide 31 capable of longitudinal movement. For example, the power slide 31 is provided with a slide motor 311, and the frame 3 is provided with a longitudinally arranged rack 312 and a longitudinally arranged linear guide 39, and the power slide 31 is slidably connected with the linear guide 39 and can slide longitudinally. A gear (not shown in the drawings) meshing with the rack 312 is fixedly provided on the rotation output end of the slide motor 311, and the slide motor 311 drives the gear to rotate, so that the power slide 31 has the power for longitudinal movement and can move longitudinally.

[0057] When viewed from above, the movement path of the laser 1 can pass through the space between the four claws 21. It should be noted that although the power slide 31 and the laser 1 in the first embodiment can both move longitudinally, considering that the laser 1 does not need to move longitudinally to improve the cutting efficiency, or considering that a single electric chuck 2 in the second embodiment described later can achieve all the cutting of the recycling battery 9, it is known that it is necessary for at least one of the power slide 31 and the laser 1 to be able to move longitudinally.

[0058] The electric chuck 2 includes a chuck base 24 and a rotating part 22, and the rotating part 22 is provided with four claws 21 arranged around the middle hole 23. The rotating part 22 can rotate relative to the chuck base 24, and it is easy to understand that the rotation is a rotation around the rotation axis of the rotating part 22. The four claws 21 are all arranged on the rotating part 22, and the four claws 21 can approach and move away from the rotation axis of the rotating part 22, and the four claws 21 can rotate with the rotation of the rotating part 22. The above functions of the electric chuck 2 are prior art, so the specific internal structure of the electric chuck 2 is not shown in the accompanying drawings. Usually, the middle hole 23 is cylindrical and has the same axis as the rotation axis of the rotating part 22.

[0059] The electric chuck 2 is provided with a through middle hole 23, and a push-out member 32 capable of longitudinal movement is provided on the power slide 31, so that the push-out member 32 can pass through the middle hole 23 to the space between the four claws 21 (this area is the space for clamping the recycling battery 9). For example, a push-out cylinder 329 is fixedly provided on the power slide 31, and the push-out member 32 is fixed on the output end of the push-out cylinder 329, and the output end of the push-out cylinder 329 extends and retracts so that the push-out member 32 can longitudinally move.

[0060] The frame 3 is provided with a drop hole 33, and the space between the four claws 21 is completely located between the drop holes 33 when viewed from above. It should be noted that the drop holes 33 in this embodiment are specifically through holes, but it is easy to think that the drop holes 33 are actually areas for receiving the dropped recycling batteries 9, so the drop holes 33 should be broadly understood as areas for receiving the dropped recycling batteries 9, such as a power belt for receiving the dropped recycling batteries 9 (such as Figure 1 As shown, the power belt is not marked in the figure), which can also be understood as the blanking hole 33.

[0061] See also Figure 6 The recycling battery 9 is in the shape of a rectangular parallelepiped as a whole, with the side where the terminal 919 is located being the battery top plate 91, and the side opposite to the battery top plate 91 being the battery bottom plate 93, and between the battery top plate 91 and the battery bottom plate 93 are four battery side plates 92. In the case where the widths of the battery side plates 92 are different (which is also a common case for recycling batteries 9), the four battery side plates 92 include two battery narrow side plates 921 and two battery wide side plates 922, and the width of the battery narrow side plates 921 is smaller than that of the battery wide side plates 922.

[0062] More specifically, the electric chuck 2 includes a first chuck 201 and a second chuck 202, that is, there are two electric chucks 2; the longitudinal movement direction of the first chuck 201 and the longitudinal movement direction of the second chuck 202 are located in the same straight line, for example, the two electric chucks 2 slide through the same linear guide 39. In order to realize the exchange of the jaws 21 between the first chuck 201 and the second chuck 202 to clamp the recycled battery 9, it is fully automated. It is easy to understand that in order to realize the exchange of the jaws 21 between the first chuck 201 and the second chuck 202 to clamp the recycled battery 9, it is necessary for at least one of the first chuck 201 and the second chuck 202 to be able to move longitudinally.

[0063] Working principle: Figure 1 As shown, after the recycling battery 9 is transported to the space between the four claws 21 by the upper battery device 8, the four claws 21 approach the rotation axis of the rotating part 22 and clamp the battery side plate 92 of the recycling battery 9, so that the center line of the recycling battery 9 coincides with the rotation axis of the rotating part 22. At this time, the battery top plate 91 is located outside the space between the four claws 21 and is not contacted by the claws 21, while the battery bottom plate 93 is located in the space between the four claws 21.

[0064] Then, the laser moving device 11 and the laser 1 are controlled to cut the recycling battery 9 in coordination with the rotation of the rotating part 22. The specific cutting process in the first embodiment will be described below.

[0065] like Fig. 9 As shown, the laser cutting 7 shows the cutting path of the laser 1 on the recycled battery 9 assuming that the recycled battery 9 is stationary. To avoid misunderstanding, it should be noted that the recycled battery 9 rotates along with the claw 21 and the rotating part 22 during the actual cutting process, so the stationary state of the recycled battery 9 is assumed to facilitate the clear display of the overall situation of the laser cutting 7.

[0066] The laser cut slit 7 on the narrow side plate 921 of the battery near the battery top plate 91 is the top plate narrow cut slit 711, and the laser cut slit 7 on the wide side plate 922 of the battery near the battery top plate 91 is the top plate wide cut slit 712. After the two top plate narrow cut slits 711 are completed with two top plate wide cut slits 712, a circle of closed top plate cut slits 71 is formed, so that the battery top plate 91 can be separated. The laser cut slit 7 on the narrow side plate 921 of the battery near the battery bottom plate 93 is the bottom plate narrow cut slit 731, and the laser cut slit 7 on the wide side plate 922 of the battery near the battery bottom plate 93 is the bottom plate wide cut slit 732. Similarly, after the two bottom plate narrow cut slits 731 are completed with two bottom plate wide cut slits 732, a circle of closed bottom plate cut slits 73 is formed, so that the battery bottom plate 93 can be separated. The longitudinal laser cut 7 on the battery side panel 92 is a side panel cut 72. After the two side panel cuts 72 are completed, the square tube battery side panel 92 is divided into two battery narrow side panels 921 and a battery wide side panel 922 (that is, the battery narrow side panel 921 and the battery wide side panel 922 are still connected to each other by an edge to form an L-shaped whole).

[0067] like Fig.10 As shown, after the laser cutting 7 is completed, the battery 9 for recycling is cut into separate battery top plate 91, battery bottom plate 93, battery internals 99, two battery narrow side plates 921 and battery wide side plates 922, so that the shell (i.e., battery top plate 91, battery side plate 92 and battery bottom plate 93) and battery internals 99 can be collected separately and then processed in accordance with the battery recycling method described below. The specific process of completing the laser cutting 7 will be described in detail below.

[0068] like Figure 8 As shown, arrow ARR1 indicates the direction in which the rotating portion 22 drives the recycling battery 9 to rotate ninety degrees; the dotted line LINE1 indicates the contour of the recycling battery 9 after the rotating portion 22 and the claw 21 drive the recycling battery 9 to rotate ninety degrees. After the recycling battery 9 is clamped by the four claws 21, the narrow side plate 921 of the battery is horizontal, and then the laser 1 is started and moved laterally to complete a narrow top plate slit 711; after the rotating part 22 rotates one hundred and eighty degrees, the laser 1 is started and moved laterally back to complete another narrow top plate slit 711; after the rotating part 22 rotates ninety degrees, the width difference between the narrow side plate 921 of the battery and the wide side plate 922 of the battery produces a height difference 929 after rotation, so the laser 1 is started and moved laterally after descending to complete a wide top plate slit 712; after the rotating part 22 rotates one hundred and eighty degrees, the laser 1 is started and moved laterally back to complete another wide top plate slit 712, at this time, the two narrow top plate slits 711 are completed with two wide top plate slits 712 to form a circle of closed top plate slits 71, and the battery top plate 91 falls due to its own weight and passes through the drop hole 33 to be collected.

[0069] Afterwards, the laser 1 is activated while moving longitudinally toward the battery bottom plate 93 to form a side panel slit 72 (it should be noted that when there is no longitudinal cutting gap 213 described below, the clamping claw 21 will block the laser 1, resulting in a complete side panel slit 72 requiring at least two cutting and splicing operations). After the rotating portion 22 rotates 180 degrees, the laser 1 moves longitudinally back to form another side panel slit 72. The laser 1 rises to avoid the longitudinal movement of the first chuck 201 or the second chuck 202 described below.

[0070] Afterwards, at least one of the first chuck 201 and the second chuck 202 moves longitudinally so that the two are close to each other, and the claw 21 of the second chuck 202 clamps the remaining part (without the battery top plate 91) of the recycled battery 9, and the battery bottom plate 93 is exposed from the claw 21. In this process, if the longitudinal length of the recycled battery 9 is short and the part of the recycled battery 9 exposed from the claw 21 is small (in order to prevent the claw 21 of the first chuck 201 and the claw 21 of the second chuck 202 from colliding with each other and being damaged, a certain distance needs to be maintained between the two), resulting in the first chuck 201 and the second chuck 202 being difficult to exchange the claw 21 to clamp the recycled battery 9, the ejector 32 starts to abut against the battery bottom plate 93 to move the recycled battery 9, so as to improve the reliability of exchanging the claw 21 between the first chuck 201 and the second chuck 202 to clamp the recycled battery 9.

[0071] Afterwards, the above process of forming a circle of closed top plate slits 71 is repeated to complete two bottom plate narrow slits 731 and two bottom plate wide slits 732 to form a circle of closed bottom plate slits 73. The battery bottom plate 93 falls due to its own weight and passes through the drop hole 33 to be collected.

[0072] Afterwards, the laser 1 is longitudinally moved and started, and two complete side plate cutting seams 72 are completed in coordination with the rotation of the rotating part 22 .

[0073] Afterwards, if Figure 5As shown, the ejector 32 resists the battery internals 99 so that it falls from the four claws 21 of the second chuck 202 to the blanking hole 33, and the reliability is high. In this process, as a preferred embodiment, this claw 21 is slightly away from the rotation axis of the rotating part 22, and only a small pressure is maintained on the recycled battery 9. At this time, the ejector 32 resists the battery internals 99, so that only the battery internals 99 fall from the four claws 21 of the second chuck 202, but the two battery narrow side plates 921 and the battery wide side plates 922 (i.e., two L-shaped integral bodies) of the battery side plate 92 are still kept between the four claws 21. After the battery internals 99 fall from the four claws 21 of the second chuck 202 to the blanking hole 33, the four claws 21 are moved away from each other and the rotating part 22 is rotated at the same time to ensure that the two battery narrow side plates 921 and the battery wide side plates 922 (i.e., two L-shaped integral bodies) fall to the blanking hole 33. This embodiment enables the battery top plate 91, the battery bottom plate 93, the battery internals 99, the two battery narrow side plates 921 and the battery wide side plates 922 to fall into the drop holes 33 in sequence, facilitating subsequent refined classification processing.

[0074] In summary, the laser cutting device for recycling batteries of the first embodiment can realize the automated cutting of the recycling batteries 9 in a relatively safe manner and with high reliability.

[0075] As one of the specific implementations, Figure 7 As shown, a longitudinal cutting gap 213 is provided between two adjacent claws 21 when viewed from above. Fig.13 , wide claw 212, narrow claw 211, wide claw 212, narrow claw 211 (i.e., two wide claws 212 and two narrow claws 211) are arranged roughly around a circle in sequence, and when viewed from above, wide claw 212 and narrow claw 211 are two adjacent claws 21. In the process of cutting to form the side panel slit 72, the laser 1 can penetrate the longitudinal length of the battery side panel 92, and the laser 1 can form a complete side panel slit 72 with one longitudinal movement and cutting, which is highly efficient; it also avoids the loss of positioning accuracy caused by exchanging claws 21 between the first chuck 201 and the second chuck 202 to clamp the recycled battery 9, thereby ensuring the accuracy of the side panel slit 72.

[0076] The present invention also provides a battery recycling method, comprising the following steps: discharging the battery to a safe voltage to form a recycling battery 9;

[0077] Load the recycled battery 9 to the battery recycling laser cutting device; as described above

[0078] Cutting and shelling the recycled battery 9, and separating the battery internals 99 from the shell;

[0079] The battery top plate 91, the battery side plate 92, the battery bottom plate 93, and the battery internals 99 are finely classified and collected; as described above, the fine classification is achieved by controlling the dropping order of the battery top plate 91, the battery side plate 92, the battery bottom plate 93, and the battery internals 99;

[0080] Remove the adhesive tape from the battery contents 99;

[0081] Classify the contents of the battery 99;

[0082] Cut the battery internals 99 to prepare for unwinding;

[0083] Unwinding and collecting the positive and negative separators of the battery internals 99 to form unwound positive and negative separators;

[0084] Drying the electrolyte on the surface of the unwound positive and negative diaphragms;

[0085] The dried positive electrode, negative electrode and separator are collected and sorted for further use, such as transporting to a professional processing factory for further processing.

[0086] Second embodiment.

[0087] The battery recycling laser cutting device of the second embodiment is different from that of the first embodiment in that the claw 21 is provided with an avoidance structure 4, so that only one electric chuck 2 can achieve the complete cutting of the recycling battery 9 without switching the first chuck 201 and the second chuck 202 to clamp the recycling battery 9, thereby eliminating the time-consuming switching and improving efficiency.

[0088] In the second embodiment of the laser cutting device for recycling batteries, the claws 21 include two narrow claws 211 for clamping the narrow side plates 921 of the battery and two wide claws 212 for clamping the wide side plates 922 of the battery. The wide claws 212 are provided with bottom plate exposure holes 42 passing through them. The laser 1 can cut the recycling battery 9 through the bottom plate exposure holes 42 to form a wide bottom plate slit 732, which is conducive to improving efficiency.

[0089] As one of the specific implementations, the narrow claw 211 is provided with a bottom plate positioning body 41, and the bottom plate positioning body 41 can be inserted between the two wide claws 212, such as Fig.14 As shown, when viewed from above, the bottom plate positioning body 41 has a portion located in the bottom plate exposure hole 42. The battery 9 for recycling is transported to the space between the four claws 21, and the battery bottom plate 93 is positioned against the bottom plate positioning body 41, which can ensure that the battery bottom plate 93 is facing the bottom plate exposure hole 42, and the laser 1 cuts through the bottom plate exposure hole 42 to form a bottom plate wide slit 732.

[0090] As one of the specific embodiments, the upper battery device 8 includes a suction cup 81. When the suction cup 81 absorbs the recycling battery 9 and transports the recycling battery 9 to the space between the four claws 21, the upper battery device 8 presses the battery bottom plate 93 of the recycling battery 9 against the bottom plate positioning body 41 with a large force to ensure the positioning accuracy of the battery bottom plate 93. The suction cup 81 and the recycling battery 9 can be displaced to absorb the large force, that is, the positioning accuracy of the battery bottom plate 93 can be ensured, and the probability of equipment damage can be reduced.

[0091] As one of the specific implementations, the narrow claw 211 is fixedly provided with an avoidance connection body 412, and the end of the avoidance connection body 412 away from the narrow claw 211 is provided with a side positioning body 411, such as Fig.14 As shown, when viewed from above, the avoidance connecting body 412 is in a U-shape as a whole to avoid the wide claw 212 and the movement of the laser 1 when cutting to form the wide slit 732 of the bottom plate. Fig.15 As shown, line 3 LINE3 represents the plane where the bottom plate slit 73 is located. When viewed from the side, the avoidance connecting body 412 is L-shaped and the side positioning body 411 exceeds the wide claw 212 in the longitudinal direction. Fig.13 As shown, the two side positioning bodies 411 clamp the battery side plate 92 as the narrow claws 211 approach each other, which can ensure the accurate lateral positioning of the recycled battery 9. Fig.14 As shown, when the laser 1 moves along the bottom plate exposed hole 42 to cut and form the bottom plate wide slit 732, no matter how high the avoidance connection body 412 is, it will not block the laser 1. Fig.15 As shown, when the laser 1 moves along line LINE3 to cut and form the bottom plate narrow slit 731, the avoidance connector 412 will not block the laser 1. Under the premise of ensuring that the laser 1 is not blocked, the horizontal positioning of the recycling battery 9 can be ensured to be accurate.

[0092] As one of the specific implementations, Fig.13 As shown, line 2 LINE2 represents the contour of the recycling battery 9. The side positioning bodies 411 and the avoidance connecting body 412 of the two narrow claws 211 are rotationally symmetrically arranged around the rotation axis of the rotating part 22, and the side positioning bodies 411 of the two narrow claws 211 have overlapping parts in height; Fig.15 As shown, when the two wide claws 212 clamp the battery side plate 92, a gap is provided between the top of the side positioning body 411 and the inner end surface of the wide claw 212 located opposite to the side positioning body 411 (i.e., the surface for clamping the recycling battery 9), such as Fig.15 As shown by the thick dotted line, this spacing allows the laser 1 to pass through and form the side panel cut 72.

[0093] See also Fig. 9, the formation of a complete laser slit 7 in the second embodiment is described below. First, the recycling battery 9 is transported to the four claws 21 through the upper battery device 8. At this time, the bottom plate positioning body 41 abuts against the battery bottom plate 93 to ensure the accurate longitudinal positioning of the recycling battery 9. It is easy to understand that since the laser 1 forms the top plate slit 71 and the bottom plate slit 73 based on the longitudinal positioning of the recycling battery 9, the longitudinal position of the laser 1 is fixed under the premise of accurate longitudinal positioning of the recycling battery 9 for the same specification. Therefore, the laser 1 or the electric chuck 2 can be quickly moved longitudinally so that the laser 1 is aligned with the top plate slit 71 or the bottom plate slit 73 in the longitudinal direction, which can improve the longitudinal positioning efficiency. Afterwards, as described in the formation process of the top plate slit 71 in the first embodiment, the lifting and lowering of the laser 1 and the rotation of the rotating part 22 cooperate with each other. After the laser 1 cuts a complete top plate slit 71, the battery top plate 91 falls off. Afterwards, the laser 1 or the electric chuck 2 moves longitudinally, so that the laser 1 approaches the battery bottom plate 93 and cuts to form the side plate slit 72, until the laser 1 and the bottom plate slit 73 are aligned in the longitudinal direction; it is easy to understand that the cutting of the laser 1 in this process forms a complete side plate slit 72. Afterwards, the laser 1 moves horizontally, cuts the recycling battery 9 through the bottom plate exposure hole 42 to form a bottom plate wide slit 732, and after the rotating part 22 rotates ninety degrees, the laser 1 moves horizontally between the two wide claws 212, cuts the recycling battery 9 to form a bottom plate narrow slit 731, and repeats the above process twice to form a complete bottom plate slit 73; it should be noted that at this time, although the battery bottom plate 93 is completely separated from the battery side plate 92, it cannot be separated from the battery side plate 92 because it is still clamped by the four claws 21. Afterwards, the rotating part 22 rotates so that the laser 1 is facing the other side plate slit 72 (i.e., the other side plate slit 72 of the side plate slit 72 formed by the aforementioned laser 1 cutting close to the battery bottom plate 93. In addition, the two side plate slits 72 are rotationally symmetrical about the center of the rotation axis of the rotating part 22), and the laser 1 or the electric chuck 2 moves longitudinally to make the laser 1 away from the battery bottom plate 93 and cut to form the other side plate slit 72. At this point, a complete laser slit 7 is formed, and then the ejector 32 operates to make the remaining part of the recycling battery 9 fall off from between the four claws to the blanking hole 33, and the next recycling battery 9 can be cut. It can be seen from the above that in this embodiment, only one electric chuck 2 is required to achieve the complete cutting of the recycled battery 9 without switching the first chuck 201 and the second chuck 202 to clamp the recycled battery 9, which can save the time of switching the electric chuck 2 to clamp the recycled battery 9 and improve efficiency; when one of the electric chucks 2 is cutting, the upper battery device 8 puts the recycled battery 9 on the other electric chuck 2, and can also ensure the accurate longitudinal positioning of the laser 1 and the recycled battery 9 and improve the longitudinal positioning efficiency of both.

[0094] As one of the specific implementations, Fig.15 As shown, the inner end face edge of the wide clamping jaw 212 is provided with a laser avoidance chamfer 422, which can ensure that the laser 1 is not blocked on the path of cutting to form the side panel slit 72; and / or, the side of the wide clamping jaw 212 is provided with a laser avoidance groove 421 facing the exposed hole 42 of the bottom plate, which can ensure that the laser 1 is not blocked on the path of cutting to form the narrow slit 731 of the bottom plate.

[0095] The terms first, second, etc. used in the present invention do not indicate any order, quantity or importance, but are only used for distinction.

[0096] As used herein, the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced object.

[0097] Terms indicating orientation or position as used in the present invention, such as top, bottom, side, longitudinal, lateral, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are intended to reflect relative positions rather than absolute positions.

[0098] As used in the present invention, the terms: generally, overall, approximately, close, etc., are limiting terms to indicate that a feature exists but a certain deviation is allowed. The amount of the certain deviation allowed may vary depending on the specific context; for example, the specific context that may depend on the deviation of a dimension includes but is not limited to the relevant standards of the dimension tolerance.

Claims

1. A laser cutting device for battery recycling, comprising a laser (1), an electric chuck (2), a frame (3), and an upper battery device (8) for conveying a battery (9) for recycling to the electric chuck (2); the laser (1) is connected to a laser moving device (11) so that the laser (1) can be raised and lowered and moved laterally; a power slide (31) is arranged on the frame (3); the device is characterized in that: At least one of the power slide (31) and the laser (1) is capable of longitudinal movement; when viewed from above, the movement path of the laser (1) is capable of passing through the space between the four claws (21); the electric chuck (2) comprises a chuck base (24) and a rotating part (22), and the rotating part (22) is provided with four claws (21) arranged around the middle hole (23); the electric chuck (2) is provided with a through middle hole (23), and the power slide (31) is provided with a longitudinally movable ejector (32), so that the ejector (32) can pass through the middle hole (23) to the space between the four claws (21); the frame (3) is provided with a blanking hole (33), and when viewed from above, the space between the four claws (21) is completely located between the blanking holes (33); The electric chuck (2) comprises a first chuck (201) and a second chuck (202); at least one of the first chuck (201) and the second chuck (202) is capable of longitudinal movement; and the longitudinal movement direction of the first chuck (201) and the longitudinal movement direction of the second chuck (202) are located on the same straight line; The clamping claw (21) comprises two narrow clamping claws (211) for clamping the narrow side plate (921) of the battery and two wide clamping claws (212) for clamping the wide side plate (922) of the battery, the wide clamping claw (212) being provided with a bottom plate exposure hole (42) penetrating therethrough; the narrow clamping claw (211) being provided with a bottom plate positioning body (41), the bottom plate positioning body (41) being capable of being inserted between the two wide clamping claws (212), and having a portion of the bottom plate positioning body (41) located in the bottom plate exposure hole (42) when viewed from above; the narrow clamping claw (211) being fixedly provided with an avoidance connection body (412), the end of the avoidance connection body (412) being away from the narrow clamping claw (211) being provided with a side positioning body (411), The avoidance connection body (412) is U-shaped as a whole when viewed from above, and is L-shaped when viewed from the side, and the side positioning body (411) exceeds the wide claw (212) in the longitudinal direction; the side positioning bodies (411) and the avoidance connection body (412) of the two narrow claws (211) are rotationally symmetrically arranged around the rotation axis of the rotating part (22), and the side positioning bodies (411) of the two narrow claws (211) have overlapping parts in height; when the two wide claws (212) clamp the battery side plate (92), a spacing is arranged between the top end of the side positioning body (411) and the inner end face of the wide claw (212) located opposite to the side positioning body (411).

2. The laser cutting device for battery recycling according to claim 1 is characterized in that: When the ejector (32) pushes against the battery contents (99) to make them fall from between the four claws (21) of the second chuck (202) to the drop hole (33), the claws (21) are away from the rotation axis of the rotating part (22) to maintain pressure on the battery (9) for recycling. At this time, the ejector (32) pushes against the battery contents (99) to make only the battery contents (99) fall from between the four claws (21) of the second chuck (202), but the two battery narrow side plates (921) and the battery wide side plate (922) of the battery side plate (92) are still kept between the four claws (21). After the battery contents (99) fall from between the four claws (21) of the second chuck (202) to the drop hole (33), the four claws (21) are moved away from each other and the rotating part (22) is rotated at the same time.

3. The laser cutting device for battery recycling according to claim 1 is characterized in that: The inner end surface edge of the wide clamping claw (212) is provided with a laser avoidance chamfer (422), and / or the side surface of the wide clamping claw (212) is provided with a laser avoidance groove (421) facing the bottom plate exposed hole (42).

4. A battery recycling method, characterized in that: The method comprises the following steps: discharging the battery to a safe voltage to form a recycling battery (9); Loading the recycled battery (9) onto the battery recycling laser cutting device as described in any one of claims 1 to 3; Cutting and removing the shell of the recycling battery (9), and separating the battery internals (99) from the shell; The battery top plate (91), the battery side plate (92), the battery bottom plate (93), and the battery internals (99) are finely classified and collected by category; Remove the adhesive tape from the battery contents (99); Classifying the contents of the battery (99); Cutting the battery internals (99) to prepare for unwinding; Unwinding and collecting the positive and negative separators of the battery internal material (99) to form unwinding positive and negative separators; Drying the electrolyte on the surface of the positive and negative diaphragms after unwinding; Collect the dried positive electrode, negative electrode and separator separately.

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