An automated disassembly system for power battery packs

Abstract

The present invention relates to the technical field of power battery packs, and in particular to an automated disassembly system for a power battery pack. An embodiment of the present invention provides an automated disassembly system for a power battery pack, comprising a data acquisition device, a disassembly device and a transport device; the data acquisition device is used to collect the shape and bolt positions of the power battery pack; the disassembly device disassembles the bolts of the power battery pack according to the shape, bolt positions and disassembly process of the power battery pack; the transport device is used to remove the upper shell of the power battery pack. An embodiment of the present invention provides an automated disassembly system for a power battery pack, which can disassemble a power battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery packs, and in particular to an automated disassembly system for power battery packs. Background Art

[0002] The power battery pack is a housing device that integrates power batteries, relays, fuses, wiring harnesses and other equipment.

[0003] After continuous use, the performance of the power battery pack may decline. When it cannot meet the use requirements of new energy vehicles, it needs to be removed and replaced. The equipment inside the replaced power battery pack still has a high recycling value. Therefore, it is necessary to disassemble the shell of the power battery pack and take out the equipment inside for further recycling.

[0004] In view of the above problems, there is an urgent need for a system that can automatically disassemble the power battery pack. Summary of the invention

[0005] An embodiment of the present invention provides an automated disassembly system for a power battery pack, which is capable of disassembling a power battery pack.

[0006] An embodiment of the present invention provides an automated disassembly system for a power battery pack, including a data acquisition device, a disassembly device, and a handling device;

[0007] The data acquisition device is used to collect the shape and bolt positions of the power battery pack;

[0008] The disassembly device disassembles the bolts of the power battery pack according to the shape, bolt positions and disassembly process of the power battery pack;

[0009] The transport device is used to remove the upper shell of the power battery pack.

[0010] In one possible design, the disassembly device includes a manipulator equipped with a screwdriver and a visual recognition device. The manipulator is used to move to the bolt according to the shape and bolt position of the power battery pack collected by the data acquisition device, and the manipulator is used to remove the bolt according to the bolt position identified by the visual recognition device.

[0011] In a possible design, the transport device includes a lifting rod, one end of which is provided with a suction cup, and the suction cup is used to remove the upper shell of the power battery pack after the bolts are removed.

[0012] In a possible design, the lifting rod and the suction cup are connected by a connecting piece, and two ends of the connecting piece are respectively connected to the lifting rod and the suction cup shaft pin;

[0013] After all the bolts are removed by the disassembling device, the lifting rod is controlled to drive the suction cup to suck the middle of the upper shell of the power battery pack and apply a preset pulling force;

[0014] If the upper shell of the power battery pack cannot be removed, move the lifting rod to drive the suction cup to one of the four surrounding positions of the upper shell of the power battery pack, and apply a preset pulling force. If the upper shell of the power battery pack cannot be removed, move it to one of the four surrounding positions of the upper shell of the next power battery pack, and then apply a preset pulling force.

[0015] In a possible design, after the lifting rod drives the suction cup to apply a preset pulling force on all four sides of the upper shell of the power battery pack, if the upper shell of the power battery pack still cannot be removed, the following gas explosion operation is performed:

[0016] Fix the bottom surface of the power battery pack on the operating table;

[0017] Drilling a hole in the side wall of the power battery pack to obtain a through hole in the side wall;

[0018] A high-pressure pipe is used to pass a high-pressure fluid into the power battery pack through the through hole, so that the gas pressure inside the power battery pack is increased and the upper shell is destroyed and separated.

[0019] In a possible design, the high-pressure fluid is passed into the power battery pack through the through hole by using a high-pressure pipe, so as to increase the gas pressure inside the power battery pack and thus destroy and separate the upper shell, including:

[0020] A high-pressure fluid is flowed into the power battery pack through the through hole at a preset flow rate by using a high-pressure pipeline through a flow control device, so that the internal air pressure of the power battery pack is increased to a preset air pressure, thereby destroying and separating the upper shell.

[0021] In a possible design, a diameter reducer is provided at the output end of the high-pressure pipeline.

[0022] In a possible design, a heat-insulating layer and a protective shell are sequentially arranged on the outside of the high-pressure pipeline.

[0023] In a possible design, a controller is also included, and the controller is used to control the operation of the disassembling device and the transporting device.

[0024] In a possible design, a clamping device is also included, and the clamping device is used to fix the power battery pack.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In this embodiment, the data acquisition device can be a video acquisition device. After acquisition, a model can be established through 3D modeling technology, and the shape and bolt position information of the power battery pack can be output based on the model. It can also be that the relevant information is manually collected and input into the data acquisition system to generate the shape and bolt position information of the power battery pack. After the data acquisition device collects the information, the disassembly device can perform precise disassembly operations according to the shape and bolt position of the power battery. After the bolts are removed, the handling device removes the upper shell of the power battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an automated disassembly system for a power battery pack provided by an embodiment of the present invention;

[0029] Figure 2 is a structural schematic diagram of another automatic disassembly system for a power battery pack provided by an embodiment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a method for disassembling a top cover of a power battery provided by an embodiment of the present invention;

[0031] Figure 4 It is a partial structural schematic diagram of a method for disassembling a top cover of a power battery according to an embodiment of the present invention.

[0032] In the figure:

[0033] 11-Manipulator;

[0034] 12-Screwdriver;

[0035] 13-upper housing;

[0036] 14-lower housing;

[0037] 15-lifting rod;

[0038] 16- Suction cup;

[0039] 17-Connector;

[0040] 18-through hole;

[0041] 19- High-pressure pipeline;

[0042] 110- reducer;

[0043] 111- insulation layer;

[0044] 112-protective shell;

[0045] 21- low temperature nozzle;

[0046] 22- Power battery;

[0047] 23-cutting piece;

[0048] 24- workbench;

[0049] 25-Robotic arm;

[0050] 26-limiting member;

[0051] 27-slide rail;

[0052] 28-Antifreeze chamber. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0056] Please refer to Figure 1, an embodiment of the present invention provides an automated disassembly system for a power battery pack, including a data acquisition device, a disassembly device and a handling device;

[0057] The data acquisition device is used to collect the shape and bolt position of the power battery pack;

[0058] The disassembly device disassembles the bolts of the power battery pack according to the shape, bolt position and disassembly process of the power battery pack;

[0059] The handling device is used to remove the upper shell 13 of the power battery pack.

[0060] In this embodiment, the data acquisition device can be a video acquisition device. After acquisition, a model can be established through 3D modeling technology, and the shape and bolt position information of the power battery pack can be output based on the model. It can also be that the relevant information is manually collected and input into the data acquisition system to generate the shape and bolt position information of the power battery pack. After the data acquisition device collects the information, the disassembly device can perform precise disassembly operations according to the shape and bolt position of the power battery. After the bolts are removed, the handling device removes the upper shell 13 of the power battery pack.

[0061] It should be noted that existing power battery packs are composed of a lower shell 14 and an upper shell 13 that closes the lower shell 14. Battery cells, relays and other devices are installed in the lower shell 14. After removing the upper shell 13, the devices in the lower shell 14 can be taken out.

[0062] In one embodiment of the present invention, the disassembly device includes a manipulator 11 equipped with a screwdriver 12 and a visual recognition device. The manipulator 11 is used to move to the bolt according to the shape and bolt position of the power battery pack collected by the data acquisition device, and the manipulator 11 is used to remove the bolt according to the bolt position identified by the visual recognition device.

[0063] In this embodiment, the bolt position collected by the data acquisition device may have a certain error. Even an error of a few millimeters may cause the screwdriver 12 to be unable to successfully remove the bolt. Therefore, based on the bolt information collected by the data acquisition device, the manipulator 11 moves to the vicinity of the bolt position and uses the visual recognition device to accurately identify the position of the bolt and its pattern posture to facilitate the smooth removal of the bolt.

[0064] In one embodiment of the present invention, the transport device includes a lifting rod 15 , one end of which is provided with a suction cup 16 , and the suction cup 16 is used to remove the upper shell 13 of the power battery pack after the bolts are removed.

[0065] In this embodiment, the vacuum suction cup 16 can be used to facilitate removal of the power battery upper housing 13 without a gripper.

[0066] In one embodiment of the present invention, the lifting rod 15 and the suction cup 16 are connected by a connecting member 17, and the two ends of the connecting member 17 are respectively connected to the lifting rod 15 and the suction cup 16 by axial pins;

[0067] After the disassembly device removes all the bolts, the lifting rod 15 is controlled to drive the suction cup 16 to suck the middle of the upper shell 13 of the power battery pack and apply a preset pulling force;

[0068] If the upper shell 13 of the power battery pack cannot be removed, move the lifting rod 15 to drive the suction cup 16 to one of the four surrounding positions of the upper shell 13 of the power battery pack and apply a preset pulling force. If the upper shell 13 of the power battery pack cannot be removed, move it to one of the four surrounding positions of the next upper shell 13 of the power battery pack and apply a preset pulling force again.

[0069] In the prior art, the connection methods of the upper shell 13 and the lower shell 14 of the power battery pack are different. The upper shell 13 of some power battery packs is directly installed on the lower shell 14 from top to bottom by bolts, and the connection method of some upper shells 13 and lower shells 14 is a rotating connection with a shaft and fixed with bolts. This results in that after removing the bolts, directly pulling the upper shell 13 upward may not necessarily remove the upper shell 13. Therefore, a preset value of pulling force is set for the lifting rod 15, and the suction cup 16 first sucks the middle part of the upper shell 13 and applies a preset value of pulling force. If it cannot be removed, the upper shell 13 and the lower shell 14 can be connected by rotating the shaft, and the suction cup 16 is moved to the surroundings of the upper shell 13 to apply a preset value of pulling force again. When the opposite side of the shaft is sucked, the shell can be opened.

[0070] Furthermore, if the upper shell 13 and the lower shell 14 are connected by a rotating shaft, it is difficult to open them by pulling them upward in a straight line. Therefore, a connecting member 17 is provided, and the two ends of the connecting member 17 are rotatably connected, so that after the suction cup 16 absorbs the upper shell 13, the suction cup 16 and the connecting member 17 as well as the connecting member 17 and the lifting rod 15 can be rotated by a certain angle, and finally the upper shell 13 can be opened by moving the lifting rod 15 straightly upward.

[0071] Please refer to Figure 2 In one embodiment of the present invention, after the lifting rod 15 drives the suction cup 16 to apply a preset pulling force on all four sides of the power battery pack upper shell 13, if the power battery pack upper shell 13 still cannot be removed, the following gas explosion operation is performed:

[0072] Fix the bottom surface of the power battery pack on the operating table;

[0073] Drilling a hole in the side wall of the power battery pack to obtain a through hole 18 on the side wall;

[0074] The high-pressure fluid is passed into the power battery pack through the through hole 18 by using the high-pressure pipe 19 , so that the gas pressure inside the power battery pack is increased and the upper shell 13 is destroyed and separated.

[0075] In this embodiment, if the above methods are unable to remove the upper shell 13, there may be hidden bolts between the upper shell 13 and the lower shell 14 that have not been removed, or the two may be connected by welding. In the prior art, in order to prevent the explosion of the power battery pack and the generation of fragments that may cause secondary damage to the driver in the event of an accident, a weak structure is provided inside the power battery pack. Once the internal air pressure is too high, the weak structure will break and open the power battery pack to release the pressure. Therefore, when the power battery pack cannot be disassembled by conventional operation, a high-pressure fluid is introduced into the power battery pack through the through hole 18. After entering the interior, the high-pressure fluid instantly expands to generate a higher air pressure, destroying the weak structure to open the upper shell 13.

[0076] In this embodiment, the high pressure fluid may be liquid carbon dioxide. Gas explosion operations should be performed in specific locations to prevent casualties.

[0077] It should be noted that the equipment inside the power battery pack is relatively compact. In order to prevent the battery cell or other important equipment from being damaged when the through hole 18 is opened, it is necessary to control the opening position of the through hole 18 and the drilling depth of the drilling device. Considering that the aluminum alloy has a certain plasticity, the drilling depth should be 4 to 8 mm. The opening position of the through hole 18 is at a position close to the side wall of the power battery and away from the bottom equipment of the lower shell 14.

[0078] It is understandable that the output end of the high-pressure pipeline 19 and the bottom of the power battery pack are fixed on the operating table to prevent the output end of the high-pressure pipeline 19 and the through hole 18 of the power battery from detaching under high air pressure.

[0079] In one embodiment of the present invention, a high-pressure fluid is passed into the power battery pack through the through hole 18 by using a high-pressure pipe 19, so that the gas pressure inside the power battery pack is increased and the upper shell 13 is destroyed and separated, including:

[0080] The high-pressure pipe 19 is used to flow the high-pressure fluid into the power battery pack through the through hole 18 at a preset flow rate through the flow control device, so that the internal air pressure of the power battery pack is increased to the preset air pressure, thereby destroying and separating the upper shell 13.

[0081] In this embodiment, in order to prevent excessive gas pressure inside the power battery pack from causing a violent gas explosion or deformation of internal equipment, the flow rate of the high-pressure gas output is adjusted to control the gas pressure inside the power battery pack.

[0082] It should be noted that if the preset air pressure still cannot open the power battery pack and the high-pressure gas input is stopped, the power battery pack can be finely cut and disassembled by human-machine cooperation. During the cutting process, pipes, battery cells, etc. must be avoided. If black smoke is found, the power battery pack should be immediately thrown into the preset explosion-proof space.

[0083] In one embodiment of the present invention, a reducer 110 is provided at the output end of the high-pressure pipeline 19. The reducer 110 can connect the through holes 18 and the high-pressure pipeline 19 of different calibers.

[0084] In one embodiment of the present invention, a heat-insulating layer 111 and a protective shell 112 are sequentially arranged outside the high-pressure pipeline 19. In order to prevent the high-pressure fluid in the high-pressure pipeline 19 from generating excessive pressure before being discharged and damaging the pipeline, the high-pressure fluid needs to be treated at low temperatures, and in order to prevent the temperature from rising when flowing through the high-pressure pipeline 19, a heat-insulating layer 111 is arranged outside it. Furthermore, in order to prevent accidental explosion, a protective shell 112 is arranged outside the high-pressure pipeline 19, and the inside of the protective shell 112 can be filled with buffer materials.

[0085] In one embodiment of the present invention, a controller is further included, and the controller is used to control the operation of the disassembling device and the transporting device.

[0086] In one embodiment of the present invention, a clamping device is also included, and the clamping device is used to fix the power battery pack.

[0087] The power batteries inside the power battery pack have extremely high recycling value. After the power battery pack is dismantled, the power batteries inside need to be further disassembled and recycled.

[0088] like Figure 3 and Figure 4 As shown, an embodiment of the present invention provides a method for disassembling a top cover of a power battery, comprising:

[0089] Use the low-temperature nozzle 21 to output low-temperature fluid to the periphery of the top cover of the power battery 22;

[0090] Using the cutting piece 23 to cut along the top cover of the power battery 22;

[0091] Remove the top cover of the power battery 22 and perform low temperature treatment on it;

[0092] Breaking the top cover of the power battery 22 that has been subjected to cryogenic treatment;

[0093] Metallic materials and non-metallic materials are obtained by screening.

[0094] In this embodiment, in order to facilitate the rapid removal of the top cover and to prevent the risk of fire and explosion during the disassembly process, the present application abandons the method of mechanical disassembly after laser melting the weld in the prior art. The present application adopts a method of disassembling the top cover of the power battery 22 by a sharp cutting piece 23 after low temperature treatment. Specifically, a low temperature nozzle 21 is first used to spray a low temperature fluid around the top cover of the power battery 22, so that the temperature of the welding position around the top cover of the power battery 22 drops sharply, reducing its toughness, so that it undergoes a small deformation when cut or directly brittle fracture without deformation. There is a difference in composition between the weld around the top cover and the metal plate connected to it, which makes it easier to break at the weld under low temperature treatment. After removing the top cover of the power battery 22, it is crushed, preferably crushed. The composition of the top cover includes insulating rubber material and metal material. Due to the different properties of the two, the metal particles are finer after crushing. The metal of the top cover can be separated by screening to prepare for its reuse.

[0095] In this embodiment, the cryogenic fluid may be liquid helium, liquid nitrogen, liquid carbon dioxide or the like.

[0096] In some embodiments of the present invention, before using the low-temperature nozzle 21 to output the low-temperature fluid to the periphery of the top cover of the power battery 22, the method further includes:

[0097] The top cover of the power battery 22 is subjected to at least one heat treatment and one cold treatment alternately.

[0098] In this embodiment, the alternating hot and cold treatment can cause thermal stress to be generated at some joints of the top cover of the power battery 22, resulting in internal defects or enlarged defects, such as defects generated during welding, so as to facilitate the removal of the top cover by low temperature treatment and cutting piece 23 at a later time.

[0099] In this embodiment, the heat treatment may be a hot air treatment, the cold treatment may be a low temperature fluid treatment, the treatment temperature of the heat treatment may be 50 to 80°C, and the temperature of the cold treatment may be -10 to 0°C.

[0100] In some embodiments of the present invention, before using the low-temperature nozzle 21 to output the low-temperature fluid to the periphery of the top cover of the power battery 22, the method further includes:

[0101] Perform ultrasonic pulse detection around the top cover of the power battery 22 to obtain the waveform and amplitude of the echo corresponding to the positions around the top cover of the power battery 22;

[0102] Determine the area and location of the welding defects around the top cover of the power battery 22 according to the waveform and amplitude of the echo;

[0103] The low temperature nozzle 21 is used to output the low temperature fluid to the periphery of the top cover of the power battery 22, including:

[0104] Starting from the point with the largest defect area in the welding part around the top cover of the power battery 22 or the point with the largest defect area per unit length, the low-temperature nozzle 21 is used to output low-temperature fluid around the top cover of the power battery 22 .

[0105] In this embodiment, ultrasonic pulse detection technology is first used to detect the welds around the top cover of the power battery 22 to detect the location, type and size of the defects in the welds. The parts with larger and denser defects are easy to be cut and separated. Therefore, the starting point of the cutting of the cutting piece 23 is determined according to the defect determination result, and the cutting piece 23 is used to puncture at the starting point to obtain a breakthrough. After the breakthrough is obtained, it is more conducive to the subsequent cutting of the cutting piece 23.

[0106] In this embodiment, judging the defect area based on the waveform and amplitude of the ultrasonic echo is a prior art and will not be described in detail here.

[0107] It should be noted that a defect density threshold can be set to determine whether to use the point with the maximum defect density as the starting point. If the defect density per unit length is lower than the defect density threshold, the point with the maximum defect area is selected as the starting point.

[0108] In some embodiments of the present invention, before using the low-temperature nozzle 21 to output the low-temperature fluid to the periphery of the top cover of the power battery 22, the method further includes:

[0109] Place the power battery 22 with the top cover facing upward on the workbench 24, and fix the power battery 22 at the center of the workbench 24 using two pairs of stoppers 26 that can slide on the slide rails 27; wherein each pair of stoppers 26 has the same distance from the center of the workbench 24 during the sliding process;

[0110] According to the position of each stopper 26, the plane position coordinates around the top cover of the power battery 22 are determined;

[0111] Collecting height information around the top cover of the power battery 22;

[0112] The low temperature nozzle 21 is used to output the low temperature fluid to the periphery of the top cover of the power battery 22, including:

[0113] The mechanical arm 25 is equipped with the low-temperature nozzle 21 to output low-temperature fluid around the top cover of the power battery 22 according to the plane position coordinates and height information.

[0114] In this embodiment, two pairs of stoppers 26 are used to fix the power battery 22 at the center of the workbench 24. Then, according to the position of the stoppers 26 on the slide rail 27, the power battery 22 is a column with a rectangular bottom surface. Therefore, the length and width of the top cover and bottom surface of the power battery 22 can be determined. The height position of the power battery 22 can be collected by visual sensors and laser ranging sensors, thereby obtaining the spatial coordinates of the power battery 22, which facilitates the robot arm 25 to accurately locate the top cover of the power battery 22.

[0115] In addition, a high-precision visual sensor may be mounted on the robotic arm 25 to identify and locate the power battery 22 .

[0116] In some embodiments of the present invention, before the low-temperature fluid is output to the periphery of the top cover of the power battery 22 by using the low-temperature nozzle 21, the method further includes:

[0117] The low-temperature nozzle 21 is used to output the low-temperature fluid to the injection hole of the top cover of the power battery 22;

[0118] Using the cutting piece 23 to break the weld at the injection hole;

[0119] The electrolyte in the power battery 22 is discharged under a vacuum environment.

[0120] In this embodiment, the injection hole of the top cover of the power battery 22 is welded and sealed, which can be broken first to discharge the electrolyte to facilitate the subsequent disassembly steps.

[0121] In some embodiments of the present invention, the cryogenic nozzle 21 and the cutting member 23 are both sheet-shaped and are disposed at one end of the mechanical arm 25;

[0122] The low temperature nozzle 21 is used to output the low temperature fluid to the periphery of the top cover of the power battery 22, including:

[0123] The low-temperature nozzle 21 is used to output a sheet-shaped low-temperature airflow to make the top cover of the power battery 22 lower than a preset temperature;

[0124] The mechanical arm 25 moves the low-temperature nozzle 21 by the same length as the cutting piece 23 to cool down the local position of the top cover of the power battery 22 again;

[0125] Cutting along the top cover of the power battery 22 using the cutting piece 23 includes:

[0126] The cutting member 23 is driven by the mechanical arm 25 to move above the portion of the top cover of the power battery 22 that is lower than the preset temperature;

[0127] Using the cutting piece 23 to descend and cut the top cover portion of the power battery 22 which is below a preset temperature;

[0128] The cutting member 23 rises after cutting, and waits for the top cover of the power battery 22 that has not been cut to drop below a preset temperature before cutting.

[0129] In this embodiment, the low-temperature nozzle 21 and the cutting piece 23 are both in the form of sheets. The low-temperature nozzle 21 is first used to cool the area to be cut to below the preset temperature, and then the mechanical arm 25 is moved to move the low-temperature nozzle 21 to the next area for cooling, and the cutting piece 23 is moved to the completed area for cutting; after the next area is cooled and the current area is cut, the mechanical arm 25 continues to move to complete the top cover cutting. The distance that the mechanical arm 25 moves is the length of the cutting piece 23. With this arrangement, the cutting piece 23 can completely cut the edge of the top cover of the power battery 22.

[0130] It should be noted that the preset temperature can be determined according to the material of the weld and empirical values, for example, it can be -180 to -50°C, and this application does not make any specific limitation.

[0131] In some embodiments of the present invention, after the low temperature nozzle 21 outputs the sheet-shaped low temperature airflow and before the mechanical arm 25 moves the low temperature nozzle 21 to a displacement having the same length as the cutting member 23, the method further includes:

[0132] An infrared temperature measuring device is used to determine whether the top cover of the power battery 22 at the bottom of the low-temperature nozzle 21 is lower than a preset temperature.

[0133] In some embodiments of the present invention, the cutting member 23 is disposed in the antifreeze chamber 28, the antifreeze chamber 28 contains antifreeze liquid, and the cutting member 23 is sealed and slidably connected to the upper and lower openings of the antifreeze chamber 28;

[0134] The cutting member 23 is lowered to cut the top cover portion of the power battery 22 which is below a preset temperature, including:

[0135] The cutting member 23 is lowered from the antifreeze chamber 28 to cut the top cover portion of the power battery 22 which is below the preset temperature;

[0136] The cutting member 23 rises after cutting, and comprises:

[0137] The cutting piece 23 is lifted into the antifreeze bin 28 after cutting.

[0138] Since the low-temperature nozzle 21 is close to the cutting piece 23, long-term use will reduce the temperature of the cutting piece 23, causing it to become brittle and fragile. Therefore, an antifreeze chamber 28 is set, and there is antifreeze in the antifreeze chamber 28. When not cutting, the cutting piece 23 is displaced into the antifreeze chamber 28, and the temperature of the antifreeze is room temperature, so that the cutting piece 23 is kept warm; when cutting, the cutting piece 23 pops out of the antifreeze chamber 28, quickly pierces and retracts the part to be cut, so that the cutting piece 23 is exposed to the outside world for a short time, and the surface of the cutting piece 23 is covered with antifreeze after it pops out, which can further protect the cutting piece 23. The pressure at the sliding sealing connection of the cutting piece 23 can be set to achieve both sealing the antifreeze to prevent leakage and allowing the surface of the cutting piece 23 to be covered with a little antifreeze when it pops out. Of course, in order to prevent the leakage of antifreeze, it is also possible to abandon the covering of the cutting piece 23 with antifreeze after it pops out, and increase the pressure at the sealing. In addition, the ejection cutting method can also increase the instantaneous passive deformation rate at the weld of the top cover, so that the cutting edge at the cutting position is regular.

[0139] In this embodiment, the antifreeze liquid can be water, fat or lubricating oil, etc.

[0140] It should be noted that in order to prevent leakage of antifreeze liquid, the cutting piece 23 cannot be completely retracted into the antifreeze chamber 28. The contact length of the sealing connection between the antifreeze chamber 28 and the cutting piece 23 can be increased so that the cutting piece 23 can both seal the antifreeze chamber 28 and not be exposed to the outside.

[0141] In some embodiments of the present invention, it further includes:

[0142] The robot arm 25 adjusts the angle so that the included angles between the plane where the low-temperature nozzle 21 and the cutting piece 23 are located and the top surface and the side surface of the power battery 22 are all 45°.

[0143] In this embodiment, when the cutting piece 23 pops out, the two components of its force are directed to the top surface and the side surface of the power battery 22 respectively, which is equivalent to the force acting on the entire top surface and the side surface of the power battery 22 respectively, which will not cause deformation of the power battery 22, and the incision will be smoother and more stable.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automated disassembly system for a power battery pack, characterized in that: It includes a data acquisition device, a disassembly device and a handling device; The data acquisition device is used to collect the shape and bolt positions of the power battery pack; The disassembly device disassembles the bolts of the power battery pack according to the shape, bolt positions and disassembly process of the power battery pack; The transport device is used to remove the upper shell (13) of the power battery pack; The handling device comprises a lifting rod (15), one end of which is provided with a suction cup (16), and the suction cup (16) is used to remove the upper shell (13) of the power battery pack after the bolts are removed; The lifting rod (15) and the suction cup (16) are connected via a connecting piece (17), and the two ends of the connecting piece (17) are respectively connected to the lifting rod (15) and the suction cup (16) by axle pins; After all the bolts are removed by the disassembling device, the lifting rod (15) is controlled to drive the suction cup (16) to suck the middle of the upper shell (13) of the power battery pack and apply a preset pulling force; If the upper shell (13) of the power battery pack cannot be removed, move the lifting rod (15) to drive the suction cup (16) to one of the four positions of the upper shell (13) of the power battery pack, and apply a preset pulling force; if the upper shell (13) of the power battery pack cannot be removed, move it to one of the four positions of the upper shell (13) of the next power battery pack, and apply a preset pulling force again; After the lifting rod (15) drives the suction cup (16) to apply a preset pulling force to the four sides of the power battery pack upper shell (13), and the power battery pack upper shell (13) still cannot be removed, the following gas explosion operation is performed: Fix the bottom surface of the power battery pack on the operating table; Drilling a hole in the side wall of the power battery pack to obtain a through hole (18) on the side wall; A high-pressure pipe (19) is used to pass a high-pressure fluid into the interior of the power battery pack through the through hole (18), so that the gas pressure inside the power battery pack is increased and the upper shell (13) is destroyed and separated.

2. The system according to claim 1, characterized in that The disassembly device comprises a manipulator (11) equipped with a screwdriver (12) and a visual recognition device, wherein the manipulator (11) is used to move to the bolt according to the shape of the power battery pack and the bolt position collected by the data collection device, and the manipulator (11) is used to remove the bolt according to the bolt position recognized by the visual recognition device.

3. The system according to claim 1, characterized in that The method of using a high-pressure pipe (19) to pass a high-pressure fluid into the interior of the power battery pack through the through hole (18) so as to increase the gas pressure inside the power battery pack and thereby destroy and separate the upper shell (13) comprises: A high-pressure pipeline (19) is used to flow a high-pressure fluid into the power battery pack through the through hole (18) at a preset flow rate through a flow control device, so that the internal air pressure of the power battery pack is increased to a preset air pressure, thereby destroying and separating the upper shell (13).

4. The system according to claim 1, characterized in that A diameter reducer (110) is provided at the output end of the high-pressure pipeline (19).

5. The system according to claim 1, characterized in that The high-pressure pipeline (19) is provided with a heat-insulating layer (111) and a protective shell (112) in sequence on its exterior.

6. The system according to claim 1, characterized in that It also includes a controller, which is used to control the disassembling device and the transporting device to work.

7. The system according to claim 1, characterized in that It also includes a clamping device, which is used to fix the power battery pack.

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