Power battery pack disassembly equipment and method

Abstract

The present invention discloses a power battery pack disassembly device and method, and belongs to the technical field of power battery pack disassembly. The disassembly device includes a disassembly device body, a precooling component, a liquid nitrogen hard plastic component, a crushing component and a clamping component. The disassembly device body includes a device housing, and the device housing is sequentially arranged as a first processing chamber, a second processing chamber and a third processing chamber from left to right; the precooling component is arranged corresponding to the first processing chamber, and the precooling component includes a first precooling part and a second precooling part, and the first precooling part is arranged on the bottom wall plate of the first processing chamber in a fixed manner. While improving the efficiency of liquid nitrogen hard plasticizing of the battery pack and reducing energy, the present invention ensures that the inner core of the battery pack will not be damaged when the outer shell of the battery pack is disassembled by impact crushing after liquid nitrogen hard plasticizing. At the same time, battery packs of different brands and sizes can be processed, which improves the practicality of the equipment and has good promotion value.

Description

Technical Field

[0001] The present invention belongs to the technical field of power battery pack disassembly, and in particular relates to a power battery pack disassembly device and method. Background Art

[0002] With the rapid increase in the number of new energy vehicles promoted and used in my country in recent years, power batteries have gradually entered a large-scale scrapping period. Since the power battery recycling and disassembly technology is not yet perfect, in order to promote the sustainable development of new energy vehicles, it is necessary to accelerate the breakthrough of key technologies and equipment research and development in the power battery recycling industry, and improve the process level and production efficiency.

[0003] The disassembly of existing power battery packs is still in a semi-automatic state. Since the power battery packs used in automobiles are relatively large, in order to improve the disassembly efficiency during disassembly, a transmission belt or a robotic arm can be used to move the battery pack.

[0004] The patent with publication number CN110479453B discloses a waste power battery disassembly equipment, including a feeding mechanism and a feeding channel, the feeding channel is composed of a downward slide section and a flip section, the upper part of the downward slide section has a liquid nitrogen hard plastic mechanism, the lower part has a first ice crushing part, the flip section has a second ice crushing part, the lower end of the flip section is connected to the translation section, the end of the translation section is provided with an end ice crushing cylinder, the connection end of the flip section and the translation section is provided with a single downward pressing ice crushing plate, the bottom of the translation section is provided with a number of hollow positions, and the bottom of the translation section is a crushed ice collection box. This patent is aimed at the automated disassembly of waste automotive power batteries, efficiently breaking the metal or plastic shell of the power battery, almost no damage to the battery core, and can achieve selective recycling of the battery core, realize short-range material regeneration, and improve efficiency and safety.

[0005] Although the above patent achieves the use of liquid nitrogen hard plasticization when disassembling the power battery pack so that the battery core will not be damaged when the outer shell is disassembled, so as to facilitate the recycling of the battery core, when the above patented equipment is used, due to the different sizes and structures of batteries of different brands, the above equipment cannot realize the disassembly and processing of battery packs of different sizes, making the practicability of the equipment poor; the delivery of liquid nitrogen is not refined enough, and the contact range of liquid nitrogen and battery pack is limited, which makes the hard plasticization effect of the battery pack poor, resulting in waste of resources and low hard plasticization efficiency; the liquid nitrogen after hard plasticization of the battery pack is not reasonably reused, further increasing the waste of energy.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] The object of the present invention is to provide a power battery pack disassembly device and method, which can solve the problems that the disassembly device is inconvenient to disassemble battery packs of different sizes, the hard plastic effect of liquid nitrogen on the battery pack is poor, and the unreasonable use of liquid nitrogen causes energy waste.

[0008] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0009] In a first aspect, the present invention provides a power battery pack disassembly device, comprising:

[0010] The disassembly equipment body includes an equipment shell, which is arranged from left to right as a first processing chamber, a second processing chamber and a third processing chamber. The power battery pack is disassembled and processed in the equipment shell. The equipment shell is arranged into different intervals so that the battery pack can be processed at different stages in different intervals, thereby improving the disassembly efficiency.

[0011] The precooling assembly is arranged corresponding to the first treatment chamber so as to precool the battery pack through the precooling assembly in the first treatment chamber. The precooling assembly includes a first precooling part and a second precooling part. The first precooling part is fixedly arranged on the bottom wall of the first treatment chamber, and the second precooling part is fixedly arranged on the top wall of the first treatment chamber. When the battery pack moves in the first treatment chamber, the bottom and top of the battery pack can be cooled by the first precooling part and the second precooling part to complete the initial cooling of the battery pack.

[0012] The liquid nitrogen hard plastic component is arranged corresponding to the second processing chamber so that the battery pack can be hard plasticized with liquid nitrogen through the liquid nitrogen hard plastic component in the second processing chamber. The liquid nitrogen hard plastic component includes a first liquid nitrogen delivery component and a second liquid nitrogen delivery component, wherein the first liquid nitrogen delivery component is fixedly arranged on the bottom wall plate of the second processing chamber, and the second liquid nitrogen delivery component is movably arranged on the top wall plate of the second processing chamber. Liquid nitrogen can be sprayed on the upper and lower surfaces of the battery pack in the second processing chamber at the same time through the first liquid nitrogen delivery component and the second liquid nitrogen delivery component, so that the upper and lower surfaces of the battery pack can be hard plasticized synchronously by liquid nitrogen, thereby improving the efficiency of liquid nitrogen hard plasticization of the battery pack and reducing the content of liquid nitrogen sprayed during hard plasticization.

[0013] The crushing assembly is arranged corresponding to the third processing chamber, so that the outer surface of the hard plastic battery pack is knocked and crushed by the crushing assembly in the third processing chamber, so that the hard plastic battery pack shell and the internal structure are separated by knocking and crushing, and the battery pack shell is disassembled. The crushing assembly includes a first crushing assembly and a second crushing assembly, the first crushing assembly is movably arranged on the bottom wall plate of the third processing chamber, and the second crushing assembly is movably arranged on the top wall plate of the third processing chamber, and the first crushing assembly and the second crushing assembly are used to knock and crush the bottom surface and the top surface of the battery pack respectively.

[0014] The clamping assembly includes a clamping plate, and a plurality of the clamping plates are provided. The plurality of clamping plates are respectively movably mounted on the inner sides of the front end and rear end wall plates of the second processing chamber and the third processing chamber; thus, the battery pack undergoing liquid nitrogen hard plasticizing in the second processing chamber and percussion crushing in the third processing chamber can be clamped and fixed by the clamping plates, so as to improve the efficiency of liquid nitrogen hard plasticizing and percussion crushing.

[0015] In one or more embodiments of the present invention, the first pre-cooling part includes a cold air delivery chamber, which is provided in the bottom wall of the first treatment chamber, and a plurality of delivery holes are provided on the inner side of the bottom wall of the first treatment chamber, and the plurality of delivery holes are connected to the cold air delivery chamber, and a second branch pipe is installed on the outer side of the bottom wall of the first treatment chamber at the air inlet of the cold air delivery chamber. The cold air is delivered to the cold air delivery chamber through the second branch pipe, and then the cold air can be ejected through the delivery hole, so that the cold air contacts the bottom of the battery pack in the first treatment chamber, thereby cooling the bottom of the battery pack. The second pre-cooling part includes a cold air nozzle, and the plurality of cold air nozzles are provided, and the plurality of cold air nozzles are installed on the top wall of the first treatment chamber, and the first branch pipe is installed on the air inlet of the cold air nozzle. The cold air is delivered to the cold air nozzle through the first branch pipe for ejection, and the cold air ejected from the cold air nozzle can contact the upper surface of the battery pack in the first treatment chamber, thereby cooling the top of the battery pack. At the same time, since there are a plurality of delivery holes and cold air nozzles, the efficiency of cooling the surface of the battery pack is improved.

[0016] In one or more embodiments of the present invention, a conveying fan is installed on one side of the device housing, a return pipe is installed on the top wall plate of the third treatment chamber, the end of the return pipe away from the third treatment chamber is installed on the air inlet of the conveying fan, a cold air delivery pipe is installed on the air outlet of the conveying fan, the end of the first branch pipe away from the cold air nozzle is installed on the cold air delivery pipe, and the end of the second branch pipe away from the cold air delivery cavity is installed on the cold air delivery pipe. By starting the conveying fan, the cold air in the third treatment chamber can be sucked in through the return pipe, and then the cold air is delivered to the first branch pipe and the second branch pipe through the cold air delivery pipe, so that the cold air in the third treatment chamber can be used to pre-cool the battery pack in the first treatment chamber, so that the cold air can be reused to reduce energy waste.

[0017] In one or more embodiments of the present invention, the first liquid nitrogen delivery assembly includes a first liquid nitrogen nozzle, a plurality of the first liquid nitrogen nozzles are provided, and the plurality of the first liquid nitrogen nozzles are all installed on the bottom wall plate of the second processing chamber, a fixed branch pipe is installed on the air inlet of the first liquid nitrogen nozzle, a bottom liquid nitrogen delivery pipe is installed on the end of the fixed branch pipe away from the first liquid nitrogen nozzle, a first solenoid valve is installed on the first liquid nitrogen nozzle, and a plurality of support columns are fixedly connected to the inner side of the bottom wall plate of the second processing chamber. Liquid nitrogen is provided to the fixed branch pipe through the bottom liquid nitrogen delivery pipe, and the liquid nitrogen delivered by the fixed branch pipe is sprayed out through the first liquid nitrogen nozzle, so that the bottom surface of the battery pack can be hard-molded by the liquid nitrogen sprayed from the first liquid nitrogen nozzle.

[0018] In order to make the liquid nitrogen sprayed by the first liquid nitrogen nozzle contact the bottom of the battery pack evenly and fully, multiple first liquid nitrogen nozzles are provided to increase the range of liquid nitrogen spraying, and support columns are provided to ensure that the liquid nitrogen sprayed by the first liquid nitrogen nozzle can flow at the bottom of the battery pack, thereby improving the efficiency of hard plasticizing the battery pack. At the same time, since there are multiple first liquid nitrogen nozzles and the battery packs are of different sizes, a first solenoid valve is provided on the fixed branch pipe, and the first solenoid valve is used to control the on and off of the fixed branch pipe, so as to adjust the number of first liquid nitrogen nozzles used according to the size of the battery pack, thereby increasing the practicality of the device and avoiding waste caused by excessive spraying of liquid nitrogen.

[0019] In one or more embodiments of the present invention, the second liquid nitrogen delivery assembly includes a second liquid nitrogen nozzle, a plurality of the second liquid nitrogen nozzles are provided, and the plurality of the second liquid nitrogen nozzles are all placed in the second processing chamber, a movable branch is installed on the air inlet of the second liquid nitrogen nozzle, the movable branch is slidably connected to the top wall plate of the second processing chamber in a through manner, a second solenoid valve is installed on the movable branch, a top liquid nitrogen delivery pipe is installed at one end of the movable branch away from the second liquid nitrogen nozzle, and a first telescopic device is installed on the side wall of the top liquid nitrogen delivery pipe. Liquid nitrogen is provided to the movable branch through the top liquid nitrogen delivery pipe, and the liquid nitrogen provided by the movable branch is sprayed through the second liquid nitrogen nozzle, so that the liquid nitrogen sprayed by the second liquid nitrogen nozzle hardens the upper surface of the battery pack.

[0020] Since the battery packs are of different sizes and thicknesses, in order to achieve a better effect of spraying liquid nitrogen onto the surface of the battery pack during hard plasticizing of the battery pack, the movable branch pipe is installed in a slidable manner. Therefore, the sliding of the movable branch pipe on the top wall plate of the second processing chamber drives the second liquid nitrogen nozzle to move, so that the distance between the front end of the second liquid nitrogen nozzle and the upper surface of the battery pack can be adjusted. Therefore, when in use, the position of the second liquid nitrogen nozzle can be adjusted according to the thickness of different battery packs, thereby improving the efficiency of liquid nitrogen hard plasticizing of the battery pack and improving the practicability of the device.

[0021] In one or more embodiments of the present invention, a liquid nitrogen storage tank is provided on one side of the equipment housing, and nitrogen delivery pipes are installed at both upper and lower ends of the liquid nitrogen storage tank, and a flow regulating valve is installed on the nitrogen delivery pipe. The end of the nitrogen delivery pipe at the lower end of the liquid nitrogen storage tank away from the liquid nitrogen storage tank is installed on the bottom liquid nitrogen delivery pipe, and the end of the nitrogen delivery pipe at the upper end of the liquid nitrogen storage tank away from the liquid nitrogen storage tank is installed with a telescopic pipe, and the end of the telescopic pipe away from the liquid nitrogen storage tank is installed on the top liquid nitrogen delivery pipe. The liquid nitrogen stored in the liquid nitrogen storage tank is transported through the nitrogen delivery pipe, and the liquid nitrogen is provided to the bottom liquid nitrogen delivery pipe and the top liquid nitrogen delivery pipe respectively through the nitrogen delivery pipes arranged at the upper and lower ends of the liquid nitrogen storage tank, and the flow regulating valve is installed on the nitrogen delivery pipe, so that the content of the transported liquid nitrogen can be finely controlled through the flow regulating valve, thereby improving the efficiency of liquid nitrogen use and reducing liquid nitrogen waste. At the same time, since the top liquid nitrogen delivery pipe is movable, a telescopic pipe is installed between the top liquid nitrogen delivery pipe and the nitrogen delivery pipe, so that when the top liquid nitrogen delivery pipe moves, the telescopic pipe can be extended and retracted to realize the delivery of liquid nitrogen to the top liquid nitrogen delivery pipe.

[0022] In one or more embodiments of the present invention, the first crushing assembly and the second crushing assembly both include movable plates, and the movable plates on the first crushing assembly and the second crushing assembly are respectively arranged on the inner sides of the top and bottom wall panels of the third processing chamber, and a plurality of ice-breaking hammers are fixedly connected to the side of the movable plate away from the top and bottom wall panels of the third processing chamber, and a second telescopic device is installed on the top and bottom wall panels of the third processing chamber, and the telescopic rod of the second telescopic device is slidably connected to the top and bottom wall panels of the third processing chamber in a through-going manner, and the front end is fixedly connected to the side wall of the movable plate away from the ice-breaking hammer, and a pair of first limiting sleeves are fixedly connected to the outer sides of the top and bottom wall panels of the third processing chamber, and a first limiting rod is slidably installed in the pair of first limiting sleeves, and the first limiting rod is slidably connected to the top and bottom wall panels of the third processing chamber in a through-going manner, and the front end is fixedly connected to the side wall of the movable plate away from the ice-breaking hammer. By extending and retracting the telescopic rod on the second telescopic device, the movable plate can be driven to move. The movement of the movable plate mobilizes the ice-breaking hammer to move, so that the ice-breaking hammer contacts the upper and lower surfaces of the battery pack, so that the upper and lower surfaces of the hard plastic battery pack can be hit and crushed by the ice-breaking hammer, so that the outer shell of the battery pack is crushed and separated from the internal structure. Since the purpose of using hard plastic crushing is to prevent damage to the battery core after the battery pack outer shell is disassembled, the setting of the ice-breaking hammer should be targeted according to the position of the battery core. At the same time, in order to make the movable plate stable when moving, a first limit rod is provided to limit the movement of the movable plate.

[0023] In one or more embodiments of the present invention, a plurality of clamping rods are fixedly connected to the side wall of the clamping plate, and the front and rear end wall plates of the second processing chamber and the third processing chamber are both slidably connected with telescopic rods in a through manner, and one end of the telescopic rod placed inside the second processing chamber or the third processing chamber is fixedly connected to the side wall of the clamping plate, and a third telescopic device is installed at one end of the telescopic rod away from the clamping plate, and a pair of second limiting sleeves are fixedly connected to the outer sides of the front and rear end wall plates of the second processing chamber and the third processing chamber, and a second limiting rod is slidably connected in the pair of second limiting sleeves, and the second limiting rod is slidably connected to the front and rear end wall plates of the second processing chamber or the third processing chamber in a through manner, and one end away from the second limiting sleeve is fixedly connected to the side wall of the clamping plate. The third telescopic device can be driven to move the telescopic rod, and when the telescopic rod moves, the clamping plate is driven to move, and when the clamping plate moves, the clamping rod is driven to move, so that the battery pack can be clamped and fixed, and the clamping rod can not only improve the stability of the battery pack when clamping, but also allow liquid nitrogen to flow through the clamping rod during clamping, so as to perform liquid nitrogen hardening on the front and rear side walls of the battery pack. The battery pack is clamped and fixed by moving the clamping plate, so that battery packs of different sizes can be clamped and fixed, thereby improving the practicability of the device.

[0024] In one or more embodiments of the present invention, a first robotic arm is installed between the first processing chamber and the second processing chamber, and a second robotic arm is installed between the second processing chamber and the third processing chamber. In order to facilitate the movement of the battery pack in the device housing, the robotic arm is provided to drive the battery pack to move between different areas in the device housing, thereby improving the efficiency of battery pack processing.

[0025] In a second aspect, the present invention provides a method for disassembling a power battery pack, the method comprising:

[0026] S1. The battery pack to be disassembled is transported into the housing of the equipment for disassembly processing, and the battery pack is precooled in the first processing chamber by the first precooling part and the second precooling part;

[0027] S2, the pre-cooled battery pack is transported to the second processing chamber by the first robot arm, and then the battery pack is clamped and fixed by the clamping plate in the second processing chamber, and the fixed battery pack is hard-molded with liquid nitrogen by the first liquid nitrogen delivery assembly and the second liquid nitrogen delivery assembly;

[0028] S3, the battery pack after liquid nitrogen hard plasticization is transported to the third processing chamber by the second robot arm, and then the battery pack is clamped and fixed by the clamping plate in the third processing chamber, and the fixed battery pack is crushed by the first crushing assembly and the second crushing assembly, so that the outer shell of the battery pack is separated from the internal structure by crushing;

[0029] S4. The cold air at the tail of the third processing chamber is recovered by a conveying fan so that the cold air containing nitrogen can be conveyed to the first processing chamber to pre-cool the battery pack. At the same time, it can be conveyed as a protective gas to the subsequent battery processing steps for use.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. The present invention is provided with a liquid nitrogen hard plastic component to perform hard plastic treatment on the upper and lower surfaces of the battery pack simultaneously through liquid nitrogen, so that the sprayed liquid nitrogen can be in uniform contact with the surface of the battery pack, which greatly improves the hard plastic efficiency of the battery pack surface and reduces the liquid nitrogen content required for hard plastic treatment of the battery pack;

[0032] 2. The present invention is provided with a crushing assembly to simultaneously crush the upper and lower surfaces of the hard plastic rear battery pack, thereby improving the crushing efficiency of the hard plastic rear battery pack shell, thereby improving the efficiency of power battery recycling;

[0033] 3. The present invention is provided with a pre-cooling component. After the liquid nitrogen is decomposed after hard molding of the battery pack, it will be recovered by a conveying fan. The conveying fan will recycle the cold air into the pre-cooling component. The battery pack is pre-cooled by the cold air, which not only realizes the secondary utilization of the cold air, but also reduces the liquid nitrogen content and the time required for hard molding of the battery pack by the liquid nitrogen hard molding component, thereby improving the hard molding efficiency of the battery pack and reducing the waste of energy;

[0034] 4. The present invention improves the efficiency of liquid nitrogen hard plasticizing of battery packs and reduces energy, while ensuring that the inner core of the battery pack will not be damaged when the outer shell of the battery pack is disassembled by breaking it after liquid nitrogen hard plasticizing. At the same time, battery packs of different brands and sizes can be processed, thereby improving the practicability of the equipment and having good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a front view of a power battery pack disassembly device in one embodiment of the present invention;

[0037] Figure 2 A three-dimensional diagram of a power battery pack disassembly device in one embodiment of the present invention;

[0038] Figure 3 A cross-sectional view of a power battery pack disassembly device according to an embodiment of the present invention Figure 1 ;

[0039] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0040] Figure 5 A cross-sectional view of a power battery pack disassembly device according to an embodiment of the present invention Figure 2 ;

[0041] Figure 6 For the present invention Figure 5 The enlarged view of point B in the middle;

[0042] Figure 7 For the present invention Figure 5 Enlarged view of point C in the middle;

[0043] Figure 8 It is a cross-sectional view of a power battery pack disassembly device in one embodiment of the present invention;

[0044] Fig. 9 For the present invention Figure 8 The enlarged view of point D in the middle;

[0045] Fig.10 is a cross-sectional view of a liquid nitrogen hard plastic component in one embodiment of the present invention;

[0046] Fig.11 is a cross-sectional view of a clamping assembly in one embodiment of the present invention;

[0047] Fig.12 For the present invention Fig.11 Enlarged view of point E in the middle.

[0048] Description of main reference numerals:

[0049] 1-Disassemble the equipment body, 11-Equipment shell, 12-First processing chamber, 13-Second processing chamber, 14-Third processing chamber, 2-Precooling assembly, 21-First precooling part, 2101-Cold air delivery chamber, 2102-Delivery hole, 22-Second precooling part, 2201-Cold air nozzle, 23-First branch pipe, 24-Second branch pipe, 25-Cold air delivery pipe, 26-Delivery fan, 27-Return pipe, 3-Liquid nitrogen hard plastic assembly, 31-First liquid nitrogen delivery assembly, 3101-First liquid nitrogen nozzle, 3102-Fixed branch pipe, 3103-Bottom liquid nitrogen delivery pipe, 3104-First solenoid valve, 3105-Support column, 32-Second Liquid nitrogen delivery assembly, 3201-second liquid nitrogen nozzle, 3202-mobile branch pipe, 3203-top liquid nitrogen delivery pipe, 3204-second solenoid valve, 3205-first telescopic device, 33-liquid nitrogen storage tank, 34-nitrogen delivery pipe, 35-flow regulating valve, 36-telescopic tube, 4-crushing assembly, 41-first crushing assembly, 42-second crushing assembly, 43-movable plate, 44-ice-breaking hammer, 45-second telescopic device, 46-first limiting sleeve, 47-first limiting rod, 5-clamping assembly, 51-clamping plate, 52-clamping rod, 53-telescopic rod, 54-third telescopic device, 55-second limiting sleeve, 56-second limiting rod. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] like Figure 1~Figure 3As shown, a power battery pack disassembly device in an embodiment of the present invention includes a disassembly device body 1, a precooling component 2, a liquid nitrogen hard plastic component 3, a crushing component 4 and a clamping component 5.

[0052] like Figure 1 and Figure 8 As shown, the disassembly equipment body 1 includes an equipment housing 11, and the equipment housing 11 is arranged from left to right as a first processing chamber 12, a second processing chamber 13 and a third processing chamber 14. The power battery pack is disassembled and processed in the equipment housing 11, and the equipment housing 11 is arranged into different intervals so that the battery pack can be processed at different stages in different intervals, thereby improving the efficiency of disassembly.

[0053] like Figure 1 and Figure 8 As shown, the precooling assembly 2 is arranged corresponding to the first processing chamber 12, so as to precool the battery pack in the first processing chamber 12 through the precooling assembly 2. The precooling assembly 2 includes a first precooling member 21 and a second precooling member 22. The first precooling member 21 is fixedly arranged on the bottom wall of the first processing chamber 12, and the second precooling member 22 is fixedly arranged on the top wall of the first processing chamber 12. When the battery pack moves in the first processing chamber 12, the bottom and top of the battery pack can be cooled by the first precooling member 21 and the second precooling member 22, thereby completing the preliminary cooling of the battery pack.

[0054] like Figure 3 and Figure 4 As shown, the first pre-cooling part 21 includes a cold air delivery chamber 2101, which is opened in the bottom wall of the first processing chamber 12, and a plurality of delivery holes 2102 are opened on the inner side of the bottom wall of the first processing chamber 12, and the plurality of delivery holes 2102 are all connected to the cold air delivery chamber 2101, and a second branch pipe 24 is installed at the air inlet of the cold air delivery chamber 2101 on the outer side of the bottom wall of the first processing chamber 12. The cold gas is delivered to the cold air delivery chamber 2101 through the second branch pipe 24, and then the cold gas can be ejected through the delivery holes 2102, so that the cold gas contacts the bottom of the battery pack in the first processing chamber 12, thereby cooling the bottom of the battery pack.

[0055] The second pre-cooling part 22 includes a cold air nozzle 2201, and there are multiple cold air nozzles 2201, which are all installed on the top wall plate of the first processing chamber 12, and a first branch pipe 23 is installed on the air inlet of the cold air nozzle 2201. The cold air is transported to the cold air nozzle 2201 through the first branch pipe 23 for spraying, and the cold air sprayed by the cold air nozzle 2201 can contact the upper surface of the battery pack in the first processing chamber 12 to achieve cooling of the top of the battery pack. At the same time, since there are multiple transport holes 2102 and cold air nozzles 2201, the efficiency of cooling the surface of the battery pack is improved.

[0056] like Figure 2 and Figure 5 As shown, a conveying fan 26 is installed on one side of the equipment housing 11, a return pipe 27 is installed on the top wall plate of the third processing chamber 14, and the end of the return pipe 27 away from the third processing chamber 14 is installed on the air inlet of the conveying fan 26, and a cold air conveying pipe 25 is installed on the air outlet of the conveying fan 26. The end of the first branch pipe 23 away from the cold air nozzle 2201 is installed on the cold air conveying pipe 25, and the end of the second branch pipe 24 away from the cold air conveying cavity 2101 is installed on the cold air conveying pipe 25. By starting the conveying fan 26, the cold air in the third processing chamber 14 can be sucked in through the return pipe 27, and then the cold air is transported to the first branch pipe 23 and the second branch pipe 24 through the cold air conveying pipe 25, so that the cold air in the third processing chamber 14 can be used to pre-cool the battery pack in the first processing chamber 12, so that the cold air can be reused for a second time to reduce energy waste.

[0057] like Figure 1 and Figure 8 As shown, the liquid nitrogen hard plastic component 3 is arranged corresponding to the second processing chamber 13, so that the battery pack in the second processing chamber 13 can be hard plasticized by liquid nitrogen through the liquid nitrogen hard plastic component 3. The liquid nitrogen hard plastic component 3 includes a first liquid nitrogen delivery component 31 and a second liquid nitrogen delivery component 32. The first liquid nitrogen delivery component 31 is fixedly arranged on the bottom wall plate of the second processing chamber 13, and the second liquid nitrogen delivery component 32 is movably arranged on the top wall plate of the second processing chamber 13. Liquid nitrogen can be sprayed on the upper and lower surfaces of the battery pack in the second processing chamber 13 at the same time through the first liquid nitrogen delivery component 31 and the second liquid nitrogen delivery component 32, so that the upper and lower surfaces of the battery pack can be hard plasticized synchronously by liquid nitrogen, which improves the efficiency of liquid nitrogen hard plasticization of the battery pack and reduces the amount of liquid nitrogen sprayed during hard plasticization.

[0058] like Figure 5 and Figure 7As shown, the first liquid nitrogen delivery assembly 31 includes a first liquid nitrogen nozzle 3101, and a plurality of first liquid nitrogen nozzles 3101 are provided. The plurality of first liquid nitrogen nozzles 3101 are all installed on the bottom wall plate of the second processing chamber 13. A fixed branch pipe 3102 is installed on the air inlet of the first liquid nitrogen nozzle 3101, and a bottom liquid nitrogen delivery pipe 3103 is installed on the end of the fixed branch pipe 3102 away from the first liquid nitrogen nozzle 3101. A first solenoid valve 3104 is installed on the first liquid nitrogen nozzle 3101, and a plurality of support columns 3105 are fixedly connected to the inner side of the bottom wall plate of the second processing chamber 13. Liquid nitrogen is provided to the fixed branch pipe 3102 through the bottom liquid nitrogen delivery pipe 3103, and the liquid nitrogen delivered by the fixed branch pipe 3102 is sprayed out through the first liquid nitrogen nozzle 3101, so that the bottom surface of the battery pack is hard-molded by the liquid nitrogen sprayed by the first liquid nitrogen nozzle 3101. In order to make the liquid nitrogen sprayed by the first liquid nitrogen nozzle 3101 contact the bottom of the battery pack evenly and fully, multiple first liquid nitrogen nozzles 3101 are provided to increase the range of liquid nitrogen spraying, and support columns 3105 are provided to ensure that the liquid nitrogen sprayed by the first liquid nitrogen nozzle 3101 can flow at the bottom of the battery pack, thereby improving the efficiency of hard plasticizing the battery pack shell. At the same time, since multiple first liquid nitrogen nozzles 3101 are provided and the sizes of battery packs are different, a first solenoid valve 3104 is provided on the fixed branch pipe 3102, and the first solenoid valve 3104 controls the on-off of the fixed branch pipe 3102, so as to adjust the number of first liquid nitrogen nozzles 3101 used according to the size of the battery pack, thereby increasing the practicality of the device and avoiding waste caused by excessive spraying of liquid nitrogen.

[0059] like Figure 5 and Figure 6 As shown, the second liquid nitrogen delivery assembly 32 includes a second liquid nitrogen nozzle 3201, and a plurality of second liquid nitrogen nozzles 3201 are provided, and the plurality of second liquid nitrogen nozzles 3201 are all placed in the second processing chamber 13. A movable branch pipe 3202 is installed on the air inlet of the second liquid nitrogen nozzle 3201, and the movable branch pipe 3202 is slidably connected to the top wall plate of the second processing chamber 13 in a penetrating manner. A second solenoid valve 3204 is installed on the movable branch pipe 3202, and a top liquid nitrogen delivery pipe 3203 is installed at one end of the movable branch pipe 3202 away from the second liquid nitrogen nozzle 3201, and a first telescopic device 3205 is installed on the side wall of the top liquid nitrogen delivery pipe 3203.

[0060] Liquid nitrogen is provided to the mobile branch pipe 3202 through the top liquid nitrogen delivery pipe 3203, and the liquid nitrogen provided by the mobile branch pipe 3202 is sprayed through the second liquid nitrogen nozzle 3201, so that the upper surface of the battery pack is hard-molded by the liquid nitrogen sprayed by the second liquid nitrogen nozzle 3201. Since the size and thickness of the battery pack are different, in order to achieve a better effect of spraying liquid nitrogen to the surface of the battery pack during hard molding of the battery pack, the mobile branch pipe 3202 is installed in a slidable manner, and the sliding of the mobile branch pipe 3202 on the top wall plate of the second processing chamber 13 drives the second liquid nitrogen nozzle 3201 to move, so that the distance between the front end of the second liquid nitrogen nozzle 3201 and the upper surface of the battery pack can be adjusted, so that when in use, the position of the second liquid nitrogen nozzle 3201 can be adjusted according to the thickness of different battery packs, thereby improving the efficiency of liquid nitrogen hard molding of the battery pack, thereby improving the practicality of the device.

[0061] like Figure 5~Figure 7 As shown, a liquid nitrogen storage tank 33 is provided on one side of the equipment housing 11, and nitrogen delivery pipes 34 are installed at both upper and lower ends of the liquid nitrogen storage tank 33, and a flow regulating valve 35 is installed on the nitrogen delivery pipe 34. The end of the nitrogen delivery pipe 34 at the lower end of the liquid nitrogen storage tank 33 away from the liquid nitrogen storage tank 33 is installed on the bottom liquid nitrogen delivery pipe 3103, and the end of the nitrogen delivery pipe 34 at the upper end of the liquid nitrogen storage tank 33 away from the liquid nitrogen storage tank 33 is installed with a telescopic pipe 36, and the end of the telescopic pipe 36 away from the liquid nitrogen storage tank 33 is installed on the top liquid nitrogen delivery pipe 3203. The liquid nitrogen stored in the liquid nitrogen storage tank 33 is transported through the nitrogen delivery pipe 34, and the liquid nitrogen is provided to the bottom liquid nitrogen delivery pipe 3103 and the top liquid nitrogen delivery pipe 3203 respectively through the nitrogen delivery pipe 34 arranged at the upper and lower ends of the liquid nitrogen storage tank 33, and the flow regulating valve 35 is installed on the nitrogen delivery pipe 34, so that the flow rate of the transported liquid nitrogen can be finely controlled by the flow regulating valve 35, so as to improve the efficiency of liquid nitrogen use and reduce the waste of liquid nitrogen. At the same time, since the top liquid nitrogen delivery pipe 3203 is movable, a telescopic pipe 36 is installed between the top liquid nitrogen delivery pipe 3203 and the nitrogen delivery pipe 34, so that when the top liquid nitrogen delivery pipe 3203 moves, the telescopic pipe 36 can be telescoped to realize the transportation of liquid nitrogen in the top liquid nitrogen delivery pipe 3203.

[0062] like Figure 1 , Figure 8 and Fig. 9As shown, the crushing assembly 4 is arranged corresponding to the third processing chamber 14, so as to knock and crush the outer surface of the hard plastic battery pack in the third processing chamber 14 through the crushing assembly 4, so as to separate the hard plastic battery pack shell and the internal structure by knocking and crushing, and realize the disassembly of the battery pack shell. The crushing assembly 4 includes a first crushing assembly 41 and a second crushing assembly 42. The first crushing assembly 41 is movably arranged on the bottom wall plate of the third processing chamber 14, and the second crushing assembly 42 is movably arranged on the top wall plate of the third processing chamber 14. The first crushing assembly 41 and the second crushing assembly 42 are used to knock and crush the bottom surface and the top surface of the battery pack respectively.

[0063] like Figure 8 Combination Fig. 9 As shown, the first crushing assembly 41 and the second crushing assembly 42 both include a movable plate 43, and the movable plates 43 on the first crushing assembly 41 and the second crushing assembly 42 are respectively arranged on the inner side of the bottom and top wall panels of the third processing chamber 14, and a plurality of ice-crushing hammers 44 are fixedly connected to the side of the movable plate 43 away from the top and bottom wall panels of the third processing chamber 14, and a second telescopic device 45 is installed on the top and bottom wall panels of the third processing chamber 14. The telescopic rod of the second telescopic device 45 is slidably connected to the top and bottom wall panels of the third processing chamber 14 in a penetrating manner, and the front end is fixedly connected to the side wall of the movable plate 43 away from the ice-crushing hammer 44.

[0064] like Figure 8 Combination Fig. 9 As shown, a pair of first limiting sleeves 46 are fixedly connected to the outer side of the top and bottom wall panels of the third processing chamber 14, and a first limiting rod 47 is slidably installed in the pair of first limiting sleeves 46. The first limiting rod 47 is slidably connected to the top and bottom wall panels of the third processing chamber 14 in a penetrating manner, and the front end is fixedly connected to the side wall of the movable plate 43 away from the ice-breaking hammer 44. Through the extension and retraction of the telescopic rod on the second telescopic device 45, the movable plate 43 can be driven to move, and the movement of the movable plate 43 drives the ice-breaking hammer 44 to move, so that the ice-breaking hammer 44 contacts the upper and lower surfaces of the battery pack, so that the upper and lower surfaces of the hard plastic battery pack can be struck and crushed by the ice-breaking hammer 44, so that the outer shell of the battery pack is crushed and separated from the internal structure. Since the purpose of using hard plastic crushing is to prevent damage to the battery core after the battery pack shell is disassembled, the setting of the ice-breaking hammer 44 should be targeted according to the position of the battery core. At the same time, in order to ensure that the movable plate 43 moves stably, a first limiting rod 47 is provided to limit the moving distance of the movable plate 43 .

[0065] like Figure 1 and Fig.11As shown, the clamping assembly 5 includes a clamping plate 51, and a plurality of clamping plates 51 are provided. The plurality of clamping plates 51 are movably mounted on the inner sides of the front and rear end wall plates of the second processing chamber 13 and the third processing chamber 14. Therefore, the clamping plates 51 can clamp and fix the battery pack that is being hard-molded by liquid nitrogen in the second processing chamber 13 and being crushed by tapping in the third processing chamber 14, thereby improving the efficiency of hard-molding by liquid nitrogen and crushing by tapping.

[0066] like Figure 10~Figure 12 As shown, a plurality of clamping rods 52 are fixedly connected to the side wall of the splint 51, and telescopic rods 53 are slidably connected to the front and rear end wall panels of the second processing chamber 13 and the third processing chamber 14 in a penetrating manner. One end of the telescopic rod 53 is placed on the inner side of the second processing chamber 13 or the third processing chamber 14 and is fixedly connected to the side wall of the splint 51, and a third telescopic device 54 is installed on the end of the telescopic rod 53 away from the splint 51. A pair of second limiting sleeves 55 are fixedly connected to the outer sides of the front and rear end wall panels of the second processing chamber 13 and the third processing chamber 14, and a second limiting rod 56 is slidably connected in the pair of second limiting sleeves 55. The second limiting rod 56 is slidably connected to the front and rear end wall panels of the second processing chamber 13 or the third processing chamber 14 in a penetrating manner and the end away from the second limiting sleeve 55 is fixedly connected to the side wall of the splint 51. The third telescopic device 54 can be driven to move the telescopic rod 53, and the movement of the telescopic rod 53 drives the clamping plate 51 to move, and the movement of the clamping plate 51 drives the clamping rod 52 to clamp and fix the battery pack. The clamping rod 52 can not only improve the stability of the battery pack when clamping, but also allow liquid nitrogen to flow through the clamping rod 52 during clamping, so as to harden the front and rear side walls of the battery pack with liquid nitrogen. The battery pack is clamped and fixed by the movement of the clamping plate 51, so that battery packs of different sizes can be clamped and fixed, which improves the practicality of the device.

[0067] Preferably, a first robotic arm is installed between the first processing chamber 12 and the second processing chamber 13, and a second robotic arm is installed between the second processing chamber 13 and the third processing chamber 14. In order to facilitate the movement of the battery pack in the device housing 11, the robotic arm is provided to drive the battery pack to move between different sections in the device housing 11, thereby improving the efficiency of battery pack processing.

[0068] During use, the power battery pack to be disassembled is transported to the equipment housing 11, and the battery pack will first enter the first processing chamber 12. When the battery pack moves in the first processing chamber 12, the cold air provided by the first pre-cooling part 21 and the second pre-cooling part 22 will pre-cool the top and bottom of the battery pack; the battery pack pre-cooled in the first processing chamber 12 is transported to the second processing chamber 13 by the first robotic arm, and the clamping rod 52 is driven by the clamping plate 51 on the front and rear side walls of the second processing chamber 13 to clamp and fix the front and rear sides of the battery pack. The fixed battery pack is hard-molded on the bottom and top of the battery pack by the liquid nitrogen sprayed by the first liquid nitrogen delivery assembly 31 and the second liquid nitrogen delivery assembly 32, and the side walls of the battery pack will be hard-molded when the liquid nitrogen flows. After the battery pack that has been hard-plasticized with liquid nitrogen in the second processing chamber 13 is clamped by the second robotic arm, and the clamping plate 51 in the second processing chamber 13 is loosened, the second robotic arm can transport the battery pack to the third processing chamber 14, and then the clamping rod 52 is driven by the clamping plate 51 in the third processing chamber 14 to clamp and fix the front and back sides of the battery pack. The fixed battery pack is moved by the first crushing assembly 41 and the second crushing assembly 42, so that the ice-breaking hammer 44 hits and crushes the bottom and top of the battery pack, so as to separate the hard-plasticized shell and the inside of the battery pack; the cold air at the end of the third processing chamber 14 is transported to the conveying fan 26 through the reflux pipe 27, so that the conveying fan 26 can pump the cold air into the first processing chamber 12 for secondary utilization.

[0069] A method for disassembling a power battery pack in an embodiment of the present invention includes:

[0070] S1, transporting the battery pack to be disassembled into the equipment housing 11 for disassembly processing, and precooling the battery pack in the first processing chamber 12 through the first precooling member 21 and the second precooling member 22;

[0071] S2, the pre-cooled battery pack is transported to the second processing chamber 13 by the first robot arm, and then the battery pack is clamped and fixed by the clamping plate 51 in the second processing chamber 13, and the fixed battery pack is hardened by liquid nitrogen by the first liquid nitrogen delivery assembly 31 and the second liquid nitrogen delivery assembly 32;

[0072] S3, the battery pack after liquid nitrogen hardening is transported to the third processing chamber 14 by the second robot arm, and then the battery pack is clamped and fixed by the clamping plate 51 in the third processing chamber 14, and the fixed battery pack is crushed by the first crushing assembly 41 and the second crushing assembly 42, so that the outer shell of the battery pack is separated from the internal structure by crushing;

[0073] S4. The cold air at the tail of the third processing chamber 14 is recovered by the conveying fan 26 so as to convey the cold air containing nitrogen to the first processing chamber 12 for pre-cooling the battery pack. At the same time, the cold air can be conveyed as a protective gas for use in subsequent battery processing steps.

[0074] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Power battery pack disassembly equipment, characterized in that: include: Disassemble the device body, including the device housing, wherein the device housing is sequentially arranged from left to right as a first processing chamber, a second processing chamber, and a third processing chamber; A precooling assembly is arranged corresponding to the first processing chamber, the precooling assembly includes a first precooling member and a second precooling member, the first precooling member is fixedly arranged on the bottom wall plate of the first processing chamber, and the second precooling member is fixedly arranged on the top wall plate of the first processing chamber; A liquid nitrogen hard plastic assembly is arranged corresponding to the second processing chamber, and the liquid nitrogen hard plastic assembly includes a first liquid nitrogen delivery assembly and a second liquid nitrogen delivery assembly, wherein the first liquid nitrogen delivery assembly is fixedly arranged on the bottom wall plate of the second processing chamber, and the second liquid nitrogen delivery assembly is movably arranged on the top wall plate of the second processing chamber; A crushing assembly is arranged corresponding to the third processing chamber, the crushing assembly includes a first crushing assembly and a second crushing assembly, the first crushing assembly is movably arranged on the bottom wall plate of the third processing chamber, and the second crushing assembly is movably arranged on the top wall plate of the third processing chamber; A clamping assembly, including a clamping plate, wherein a plurality of clamping plates are provided, and the plurality of clamping plates are movably mounted on the inner sides of the front end and rear end wall plates of the second processing chamber and the third processing chamber respectively; Wherein, the first pre-cooling part comprises a cold air delivery chamber, the cold air delivery chamber is provided in the bottom wall plate of the first processing chamber, a plurality of delivery holes are provided on the inner side of the bottom wall plate of the first processing chamber, the plurality of delivery holes are all connected with the cold air delivery chamber, a second branch pipe is installed at the air inlet of the cold air delivery chamber on the outer side of the bottom wall plate of the first processing chamber, the second pre-cooling part comprises a cold air nozzle, a plurality of the cold air nozzles are provided, the plurality of the cold air nozzles are all installed on the top wall plate of the first processing chamber, and a first branch pipe is installed on the air inlet of the cold air nozzle; A conveying fan is installed on one side of the equipment shell, a return pipe is installed on the top wall panel of the third treatment chamber, the end of the return pipe away from the third treatment chamber is installed on the air inlet of the conveying fan, a cold air conveying pipe is installed on the air outlet of the conveying fan, the end of the first branch pipe away from the cold air nozzle is installed on the cold air conveying pipe, and the end of the second branch pipe away from the cold air conveying cavity is installed on the cold air conveying pipe.

2. The power battery pack disassembly equipment according to claim 1, characterized in that: The first liquid nitrogen delivery assembly includes a first liquid nitrogen nozzle, a plurality of the first liquid nitrogen nozzles are provided, and the plurality of the first liquid nitrogen nozzles are all installed on the bottom wall plate of the second processing chamber, a fixed branch pipe is installed on the air inlet of the first liquid nitrogen nozzle, a bottom liquid nitrogen delivery pipe is installed on the end of the fixed branch pipe away from the first liquid nitrogen nozzle, a first solenoid valve is installed on the first liquid nitrogen nozzle, and a plurality of support columns are fixedly connected to the inner side of the bottom wall plate of the second processing chamber.

3. The power battery pack disassembly equipment according to claim 2, characterized in that: The second liquid nitrogen delivery assembly includes a second liquid nitrogen nozzle, a plurality of the second liquid nitrogen nozzles are provided, and the plurality of the second liquid nitrogen nozzles are all placed in the second processing chamber, a movable branch pipe is installed on the air inlet of the second liquid nitrogen nozzle, the movable branch pipe is slidably connected to the top wall plate of the second processing chamber in a penetrating manner, a second solenoid valve is installed on the movable branch pipe, a top liquid nitrogen delivery pipe is installed at one end of the movable branch pipe away from the second liquid nitrogen nozzle, and a first telescopic device is installed on the side wall of the top liquid nitrogen delivery pipe.

4. The power battery pack disassembly equipment according to claim 3, characterized in that: A liquid nitrogen storage tank is arranged on one side of the equipment shell, and nitrogen delivery pipes are installed at both upper and lower ends of the liquid nitrogen storage tank, and a flow regulating valve is installed on the nitrogen delivery pipe. The end of the nitrogen delivery pipe at the lower end of the liquid nitrogen storage tank away from the liquid nitrogen storage tank is installed on the bottom liquid nitrogen delivery pipe, and the end of the nitrogen delivery pipe at the upper end of the liquid nitrogen storage tank away from the liquid nitrogen storage tank is installed with a telescopic pipe, and the end of the telescopic pipe away from the liquid nitrogen storage tank is installed on the top liquid nitrogen delivery pipe.

5. The power battery pack disassembly equipment according to claim 1, characterized in that: The first crushing assembly and the second crushing assembly both include movable plates, and the movable plates on the first crushing assembly and the second crushing assembly are respectively arranged on the inner sides of the top and bottom wall panels of the third processing chamber, and a plurality of ice-breaking hammers are fixedly connected to the side of the movable plate away from the top and bottom wall panels of the third processing chamber, and a second telescopic device is installed on the top and bottom wall panels of the third processing chamber, and the telescopic rod of the second telescopic device is slidably connected to the top and bottom wall panels of the third processing chamber in a penetrating manner, and the front end is fixedly connected to the side wall of the movable plate away from the ice-breaking hammer, and a pair of first limiting sleeves are fixedly connected to the outer sides of the top and bottom wall panels of the third processing chamber, and a first limiting rod is slidably installed in the pair of first limiting sleeves, and the first limiting rod is slidably connected to the top and bottom wall panels of the third processing chamber in a penetrating manner, and the front end is fixedly connected to the side wall of the movable plate away from the ice-breaking hammer.

6. The power battery pack disassembly equipment according to claim 1, characterized in that: A plurality of clamping rods are fixedly connected to the side wall of the splint, and telescopic rods are slidably connected to the front and rear end wall panels of the second and third processing chambers in a penetrating manner. One end of the telescopic rod is placed on the inner side of the second or third processing chamber and is fixedly connected to the side wall of the splint, and a third telescopic device is installed on the end of the telescopic rod away from the splint. A pair of second limiting sleeves are fixedly connected to the outer sides of the front and rear end wall panels of the second and third processing chambers, and a second limiting rod is slidably connected to the inside of the pair of second limiting sleeves. The second limiting rod is slidably connected to the front and rear end wall panels of the second or third processing chamber in a penetrating manner and is fixedly connected to the side wall of the splint at one end away from the second limiting sleeve.

7. The power battery pack disassembly equipment according to claim 1, characterized in that: A first robot arm is installed between the first processing chamber and the second processing chamber, and a second robot arm is installed between the second processing chamber and the third processing chamber.

8. A power battery pack disassembly method, applied to the power battery pack disassembly device according to any one of claims 1 to 7, characterized in that: The power battery pack disassembly method comprises: S1. The battery pack to be disassembled is transported into the housing of the equipment for disassembly processing, and the battery pack is precooled in the first processing chamber by the first precooling part and the second precooling part; S2, the pre-cooled battery pack is transported to the second processing chamber, and then the battery pack is clamped and fixed by the clamping plate in the second processing chamber, and the fixed battery pack is hard-molded with liquid nitrogen by the first liquid nitrogen delivery assembly and the second liquid nitrogen delivery assembly; S3, the battery pack after liquid nitrogen hard plasticization is transported to the third processing chamber, and then the battery pack is clamped and fixed by the clamping plate in the third processing chamber, and the fixed battery pack is crushed by the first crushing assembly and the second crushing assembly, so that the outer shell of the battery pack is separated from the internal structure by crushing; S4. Recover the cold air at the tail of the third processing chamber through a conveying fan, so as to convey the cold air containing nitrogen into the first processing chamber to pre-cool the battery pack, and convey it to the subsequent battery processing steps as a protective gas for use.

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