Battery pack disassembly positioning device, milling system and heat treatment and pressing device and method

Abstract

The invention relates to a battery pack disassembling and positioning device, a milling system and a heat treatment and pressing device and method. The battery pack disassembling and positioning device comprises a battery pack clamping mechanism, and the battery pack clamping mechanism comprises a turnover assembly and a supporting part rotationally connected with the turnover assembly; a plurality of positioning pieces rotationally connected with the supporting part are arranged at the top of the supporting part, and the positioning pieces can limit continuous overturning of the overturning assembly together with the battery pack. Through mutual cooperation of the overturning assembly and the positioning piece, station switching of the battery pack on the same device through overturning can be achieved, the battery pack does not need to be carried to other equipment, pretreatment operation before disassembly can be completed, such as discharging, cooling liquid emptying and other procedures, and the pretreatment operation efficiency is greatly improved; in addition, the positioning piece can stably limit the overturned battery pack, it is guaranteed that the battery pack does not deviate or shake in the pretreatment and subsequent disassembling operation process, and the safety and accuracy of operation are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery recycling, in particular to a battery pack disassembly positioning device, a milling system, and a heat treatment, pressing device and method. BACKGROUND

[0002] With the rapid development of new energy vehicles, the amount of scrap power batteries increases year by year. Battery packs have been widely used in various new energy vehicle fields due to their compact structure, high energy density, and low manufacturing cost. However, the structural characteristics of battery packs pose many challenges to recycling and disassembly, especially the existing CTP battery pack recycling method generally has low disassembly efficiency, high cell damage rate, and insufficient automation, which cannot meet the needs of large-scale industrial recycling. Unlike traditional battery packs with modules, CTP battery packs eliminate the intermediate module structure, and the battery is directly fixed in the battery pack shell through a large number of structural glue and heat-conducting glue. The adhesion strength between the cell and the shell and the liquid cooling plate is high, and the glue layer connection needs to be broken during disassembly. The existing technology mainly uses manual prying, hammering, low-temperature freezing, chemical agent soaking, etc. to process the glue layer, which not only consumes a lot of manpower and is inefficient, but also easily causes cell damage and electrolyte splashing, posing a safety hazard. Chemical soaking method will produce waste gas and waste liquid, causing environmental pollution. Low-temperature freezing method will result in high cell loss rate, and the yield can only reach 50%-60%.

[0003] Application No. CN202310449641.4, Application Date: April 23, 2023, Invention Name: Battery pack disassembly device and battery pack disassembly method, this invention relates to the technical field of battery recycling, aiming to solve the problem of low disassembly efficiency of existing battery packs. For this purpose, the disassembly device includes: a base on which the battery pack is placed; an edge lifting mechanism that lifts the gap between the cold plate and the box frame; a pry plate mechanism including a contact that is inserted into the gap, and the temperature of the contact will destroy the bottom glue of the cell in contact with it; a pushing mechanism that pushes the battery pack towards the contact or pushes the contact towards the battery pack. The battery pack disassembly method includes: placing the battery pack on the base; the edge lifting mechanism lifts the gap between the cold plate and the box frame; the contact of the pry plate mechanism is inserted into the gap, and the pry plate mechanism cooperates with the pushing mechanism to disassemble the cold plate from the box frame. This invention precisely destroys the bottom glue of the cell between the cell block and the box structure, achieving large-scale, efficient, and low-cost disassembly.

[0004] The above-mentioned existing technology can only realize partial disassembly of the battery pack. Before the operation, the battery pack needs to be pre-transferred to other equipment to complete the pretreatment processes such as discharging and cooling liquid emptying, and then the battery pack needs to be transported to the base for fixation. The process is scattered, the transportation is frequent, the overall process is complicated, and it is not conducive to large-scale continuous operation.

[0005] In addition, the prior art relies on contact heating to destroy the bottom glue of the battery cell and forcibly disassembles, while the bottom glue of the battery cell has high bonding strength and small thickness, and in the process of forcibly breaking the glue layer, the battery cell body is easily damaged due to force concentration or improper temperature control, affecting the integrity and safety of the battery cell after recycling, and it is difficult to meet the efficient and low-damage battery pack disassembly requirements. SUMMARY

[0006] In view of the defects of the prior art, such as dispersed process and easy damage to the battery cell body, the purpose of the present application is to provide a battery pack disassembly positioning device, a milling system, a heat treatment device, a pressing device and corresponding methods, which can realize quick switching of the battery pack between different operation stations, and improve the success rate of battery lossless recycling.

[0007] The technical scheme provided by the present application is:

[0008] A battery pack disassembly positioning device, comprising a battery pack clamping mechanism, the battery pack clamping mechanism comprising a turnover assembly and a support portion rotatably connected with the turnover assembly, the turnover assembly being used to drive the battery pack to turn over synchronously; Wherein, the top of the support portion is provided with a plurality of positioning members rotatably connected therewith, and the positioning members can limit the turnover assembly and the battery pack from continuing to turn over. Through the cooperation of the turnover assembly and the positioning members, the battery pack can be switched between stations by turning over on the same device, without the need to transport the battery pack to other equipment, so that the pretreatment operation before disassembly, such as discharging, cooling liquid emptying and other processes, can be completed, and the pretreatment operation efficiency is greatly improved; In addition, the positioning members can stably position the turned-over battery pack, so as to ensure that the battery pack does not shift or shake during the pretreatment and subsequent disassembly operation process, and to ensure the safety and accuracy of the operation.

[0009] Further, the turnover assembly comprises, a fixed beam for fixing the battery pack, and the bottom surface of the battery pack is arranged opposite to the fixed beam, and a cavity is formed in the middle portion of the fixed beam, and the cavity is used to provide operation space for the milling disassembly operation of the battery pack; a rotating shaft fixedly connected with the fixed beam, and the fixed beam is rotatably connected with the support portion through the rotating shaft; a rotating handle fixedly connected with the rotating shaft, and the rotating handle is used to drive the rotating shaft and the fixed beam to turn over synchronously.

[0010] The fixed beam can stably fix the battery pack, and the middle cavity provides operation space for the milling operation; the rotating shaft ensures smooth turning, and the rotating handle is convenient for the operator to apply force, so that the battery pack station can be quickly switched, and the overall structure is simple and convenient to operate, which improves the operation efficiency and reduces the labor intensity.

[0011] Further, the initial working position of the upper cover of the battery pack is defined as the first position; When the battery pack clamping mechanism turns the battery pack over around the rotation axis, the working position of the bottom plate of the battery pack facing upward is defined as the second position; When the battery pack is in the first position and the second position respectively, the positioning member can rotate to the lower side of the fixed beam and tightly abut against the bottom of the fixed beam to limit the fixed beam from continuing to deflect around the rotation axis.

[0012] By setting the first position and the second position, and cooperating with the positioning member to abut against and limit the fixed beam, the position switching of different working positions can be quickly completed, the positioning is accurate and reliable, and the continuity and safety of the overall disassembly process are effectively improved.

[0013] Further, the positioning member is provided at least two; when two are provided, the positioning member is provided at the diagonal position of the support part. By adopting this arrangement, symmetrical and stable support and limitation of the fixed beam can be achieved.

[0014] Further, the support part is a frame structure, and a plurality of universal wheels are arranged at the bottom of the support part. The support part adopts a frame structure, which is light in weight and high in strength. The universal wheels arranged at the bottom can realize flexible movement and transfer of the entire disassembly and positioning device, facilitate quick switching between different processes, and do not need to repeatedly disassemble and assemble the battery pack, thereby improving the continuity and overall efficiency of the disassembly work.

[0015] Further, a base plate is arranged below the support part, the base plate is located directly below the battery pack, and the orthographic projection of the battery pack on the plane of the base plate always completely falls within the bearing range of the base plate. The base plate can receive the separated battery, thereby facilitating subsequent collection.

[0016] A battery pack milling system, comprising a battery pack disassembly and positioning device, and further comprising a milling cutter assembly, the milling cutter assembly being used for milling through the bottom plate and at least part of the liquid cooling plate of the battery pack; When the milling cutter assembly works, the battery pack is in the second position. The milling system can complete the milling work on the same disassembly and positioning device, and can accurately mill through the bottom plate and part of the liquid cooling plate in cooperation with the second position, and will not cause damage to the battery.

[0017] A battery pack heat treatment device, comprising a battery pack disassembly and positioning device, and further comprising an oven, the oven being capable of accommodating the battery pack clamping mechanism and the battery pack milled through by the battery pack milling system; The battery pack comprises a plurality of batteries, and a heat-conducting adhesive is arranged between the liquid cooling plate and the battery; and the oven is used for softening the heat-conducting adhesive. The heat treatment device can place the battery pack and the disassembly and positioning device in the oven for heating without disassembling the battery pack; by uniformly softening the heat-conducting adhesive, the subsequent disassembly work can be more smooth.

[0018] Further, the oven is provided with a plurality of door curtains on at least one side, and the adjacent edges of the adjacent two door curtains are overlapped in the hanging state; the height of the door curtain is greater than the height of the battery pack clamping mechanism and the battery pack carried thereby. The overlapped door curtains can effectively reduce heat loss in the oven, ensure uniform and stable internal temperature, facilitate the entry and exit of the device, and improve the heat treatment efficiency and safety.

[0019] Further, the working temperature in the oven is not less than 100 DEG C, and the heat preservation time is not less than 45 minutes.

[0020] A battery pack pressing device, comprising a battery pack disassembling and positioning device and a battery pack softened after heat treatment, further comprising, a frame structure; a pressing assembly horizontally and slidably connected with the frame structure, wherein the pressing assembly is vertically movable relative to the frame structure, and is used for pressing the softened battery pack to recover the battery; when the pressing assembly is pressed, the battery pack is in a second position.

[0021] The pressing device can directly complete the pressing and recovery of the battery cell on the disassembling and positioning device, and has strong operation continuity and high recovery efficiency in cooperation with the second position station.

[0022] Further, the frame structure is provided with a horizontal guide rail; and the pressing assembly comprises a sliding block assembly matched with the horizontal guide rail.

[0023] Further, the pressing assembly further comprises a driving mechanism and an extension part; wherein the driving mechanism is used for driving the extension part to vertically move; the extension part comprises, from top to bottom, an extension rod and a first push plate connected with the bottom of the extension rod; a second push plate is elastically connected with the first push plate through an elastic member, and the second push plate is opposite to the battery pack and is used for disassembling the battery pack; one end of the elastic member is fixedly connected with the first push plate, and the other end is fixedly connected with the second push plate. The elastic member can play a buffering role in the pressing process, so that the force is uniform and soft, and rigid impact damage to the battery is avoided, and the recovery rate of the battery is improved.

[0024] Further, the pressing assembly further comprises a guide rod arranged in the elastic member; one end of the guide rod is fixedly connected with the second push plate, and the other end penetrates through the first push plate and is movably connected with the first push plate; and the guide rod is used for guiding the extension and contraction of the elastic member. The guide rod can ensure that the second push plate does not deviate and shake during the up-and-down movement, so that the pressing force is always uniform and stable, and further damage to the battery is avoided.

[0025] A battery pack disassembly method uses the following steps: Positioning and fixing: the battery pack to be disassembled is fixed on the clamping mechanism of the battery pack disassembly positioning device, the upper cover of the battery pack is upward in the first position, the positioning piece on the support part is rotated to abut against the bottom of the fixed beam of the turnover assembly to limit the deflection of the turnover assembly; the battery pack to be disassembled is discharged, then the cooling liquid in the liquid cooling plate of the battery pack is emptied, the upper cover of the battery pack is removed, and the equalization wire harness and pressure sensor inside the battery pack are removed; Turnover and position change: the rotating handle is rotated to drive the rotating shaft and the fixed beam to be synchronously turned over, so that the bottom plate of the battery pack is upward in the second position, and the positioning piece is abutted against the bottom of the fixed beam again to realize the positioning and fixing of the battery pack working position; Milling operation: the milling cutter assembly of the battery pack milling system is used to mill through the bottom plate and at least part of the liquid cooling plate of the battery pack; Heat treatment softening: the battery pack after milling is sent into the oven of the battery pack heat treatment device together with the battery pack disassembly positioning device, the working temperature and holding time in the oven are controlled, and the heat-conducting glue between the liquid cooling plate and the battery is softened; Lowering and recycling: the battery pack after heat treatment softening is moved out of the oven together with the battery pack disassembly positioning device, the battery pack is kept in the second position, the battery pack lowering mechanism is used, the lower part is slid to the upper part of the battery pack along the horizontal guide rail of the frame structure, the telescopic part is vertically moved by the driving mechanism, the battery pack is pressed down by the second pressing plate, the battery is separated under the cooperation of the elastic member and the guide rod, and the separated battery falls on the base plate of the support part, and the recycling is completed.

[0026] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects: (1) The present application can realize quick and stable switching of different working positions of the battery pack by setting the turnover assembly and the support part connected with the turnover assembly; the positioning piece on the top of the support part can reliably limit the turnover assembly to ensure the safety of each working position. Through the cooperation of the turnover assembly and the positioning piece, the battery pack can continuously complete the pretreatment processes such as discharging, cooling liquid emptying, and upper cover dismounting on the same device, without the need for multiple transportation and disassembly of the battery pack, which not only avoids damage to the battery cells during transportation, but also greatly simplifies the overall disassembly process and significantly improves the disassembly pretreatment efficiency and safety.

[0027] (2) The milling system of the present application can accurately mill through the bottom plate and part of the liquid cooling plate through the cavity of the fixed beam when the battery pack is in the second position, which not only ensures controllable milling path and high operation precision, but also effectively avoids the battery area, so as to not cause any damage to the battery, provides stable structural conditions for the subsequent uniform heating and softening of the heat-conducting glue, and improves the continuity and safety of the overall disassembly process.

[0028] (3) The application can directly press and separate the battery pack whose heat-conducting glue has been fully softened on the same disassembling positioning device, without secondary clamping, rigid impact throughout, and damage to the battery; in cooperation with the horizontally movable pressing assembly, each battery cell position can be aligned one by one, the pressing action is stable and the guidance is reliable; the separated battery can be collected by the supporting part below the pad, which is convenient for quick collection, greatly improves the integrity, safety and operation efficiency of battery recycling, and realizes continuous and lossless disassembly and recycling. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The device overall layout used in the battery pack disassembly process in an embodiment of the application; Figure 2 The battery pack upper cover upward schematic diagram (the upper cover is not shown) in an embodiment of the application; Figure 3 The battery pack disassembly process in an embodiment of the application; Figure 2 The A node partial large sample diagram in an embodiment of the application; Figure 4 The overturning assembly overturning schematic diagram in an embodiment of the application; Figure 5 The battery pack bottom plate upward schematic diagram in an embodiment of the application; Figure 6 The battery pack disassembly process in an embodiment of the application; Figure 5 The B node partial large sample diagram in an embodiment of the application; Figure 7 The battery pack partial sectional view in an embodiment of the application; Figure 8 The oven schematic diagram in an embodiment of the application; Figure 9 The battery pack pressing device schematic diagram in an embodiment of the application; Figure 10 The battery pack disassembly process in an embodiment of the application; Figure 9 The C node partial large sample diagram in an embodiment of the application; Figure 11 The driving mechanism driving telescopic rod vertical movement schematic diagram of the pressing assembly in an embodiment of the application; Figure 12 The relative position relationship schematic diagram of the elastic member, the first push plate and the second push plate in an embodiment of the application.

[0030] Explanation of the reference numerals in the schematic diagram: Battery pack clamping mechanism 1; overturning assembly 11, fixed beam 111, rotating shaft 112; supporting part 12, positioning member 121, universal wheel 122, pad 123; rotating handle 113; Milling tool assembly 2; Oven 3; door curtain 31; Frame structure 4; horizontal guide rail 40; pressure display 41; pressure regulating valve 42; hand control valve 43; Downward pressing assembly 5; driving mechanism 50; telescopic rod 51, first push plate 511, second push plate 512, elastic member 513, guide rod 514, sliding block body 515, connecting plate 516, connecting rod 517; pressure sensor 52; Bottom plate 61; liquid cooling plate 62; heat-conducting adhesive 63; battery 64. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present application, the present application will be described in detail in conjunction with the drawings and examples.

[0032] The structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope covered by the disclosed technology. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like used in the specification are only for the convenience of clear description, and are not used to limit the scope of implementation. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation scope of the present application.

[0033] In view of the technical problems such as low disassembly efficiency, high damage rate of battery cells, insufficient automation, poor coordination of each process, and non-standard pretreatment in the disassembly and recycling of existing battery packs (especially CTP battery packs), the present application proposes an integrated battery pack disassembly technical solution. The core invention concept is to design a special battery pack disassembly positioning device to achieve stable fixation and work position overturning positioning of the battery pack, providing a basis for subsequent processes; to match with a milling system, a heat treatment device, and a downward pressing device to form a standardized disassembly process of "pretreatment-positioning-milling-heat treatment-downward pressing recycling", with each device cooperating and accurately connecting.

[0034] In addition, the pretreatment steps such as discharging before disassembly, emptying the cooling liquid, and removing parts are standardized, the heat treatment softens the heat-conducting adhesive, the milling breaks the structural connection, and the downward pressing stably separates the battery cells. The whole process is precisely controlled to reduce manual intervention, and finally realizes efficient, safe, and low-damage large-scale industrialized recycling of battery packs, solves many drawbacks of existing technologies, improves disassembly efficiency and battery cell recycling rate, and adapts to the development needs of the industry.

[0035] Example 1 The battery pack disassembling positioning device of the application comprises a battery pack clamping mechanism 1, which is the core component of the entire positioning device and is used for realizing clamping, overturning and station positioning of the battery pack, and specifically comprises an overturning assembly 11 and a support part 12 rotationally connected with the overturning assembly 11. The overturning assembly 11 can drive the battery pack to overturn synchronously, and the working station of the battery pack can be flexibly adjusted, thereby solving the problem that the existing disassembling device cannot flexibly switch stations and causing subsequent milling, pressing and other process operations to be inconvenient, and significantly improving the flexibility of disassembling operation.

[0036] The support part 12 adopts a frame structure, effectively reducing the weight of the entire positioning device and facilitating the movement and transfer of the device. The bottom of the support part 12 is provided with a plurality of universal wheels 122, preferably four universal wheels 122, which are respectively installed at the four corners of the bottom of the support part 12. The universal wheels 122 are provided with a brake function, which can realize flexible movement of the entire positioning device, facilitate the transfer of the battery pack to different working areas such as heat treatment and pressing, and can also lock the universal wheels 122 through the brake to avoid movement of the device during operation, further improving the positioning stability.

[0037] The support part 12 is provided below with a base plate 123, which is located directly below the battery pack, and the orthographic projection of the battery pack on the plane where the base plate 123 is located always falls completely within the bearing range of the base plate 123. In other words, the size of the base plate 123 is larger than the size of the battery pack, and the base plate 123 is flexible, and the battery 64 after disassembling the battery pack directly falls on the base plate 123.

[0038] The top of the support part 12 is provided with a plurality of positioning members 121 rotationally connected therewith. The positioning members 121 and the support part 12 are preferably rotationally connected through a pin shaft, which rotates smoothly and is reliable in positioning.

[0039] The positioning members 121 can abut against the bottom of the overturning assembly 11 after rotation, thereby limiting the overturning of the overturning assembly 11 together with the battery pack, realizing stable positioning of the battery pack at the specified station, avoiding deviation and shaking of the battery pack during disassembling operation, reducing the risk of battery damage, and improving the safety and accuracy of disassembling operation.

[0040] It is worth noting that the angle of the positioning member 121 rotating to the bottom of the overturning assembly 11 does not need to be fixed. As long as the positioning member 121 can form effective abutment with the bottom of the overturning assembly 11 and generate sufficient supporting resistance, the limiting effect on the overturning assembly 11 can be realized, without the need to strictly control the specific value of the rotation angle.

[0041] This setting mode greatly improves the adaptability and operation convenience of the positioning member 121, reduces the operation difficulty of the operator, does not need to accurately control the rotation angle, and only needs to rotate the positioning member 121 to tightly abut against the bottom of the overturning assembly 11 to complete the positioning, further improving the disassembling operation efficiency.

[0042] In order to further optimize the operation convenience, a handle can be arranged on the positioning member 121, and the handle is welded or integrally formed with the positioning member 121, so that an operator can hold and apply force, and the positioning member 121 can be rotated more easily and quickly, and the operation difficulty is reduced.

[0043] The number of the positioning members 121 is not less than two, and at least two positioning members 121 are symmetrically arranged at diagonal positions of the support part 12. This arrangement can effectively support and fix the fixed beam 111, and prevent the battery pack from tilting and shaking during disassembly operation. Of course, in other embodiments, the positioning member 121 can be arranged as three or four according to the weight and size of the battery pack, which all belong to the protection scope of the application.

[0044] As an optional embodiment, the turnover assembly 11 specifically comprises the fixed beam 111, the rotating shaft 112 and the rotating handle 113, which cooperatively fix and turn over the battery pack. The top of the fixed beam 111 is spaced apart by a plurality of adjustable clamping blocks, the spacing of the clamping blocks can be adjusted according to the width of the battery pack, for firmly fixing the battery pack on the fixed beam 111, and the bottom surface of the battery pack is arranged opposite to the fixed beam 111 to ensure the stability of the fixed battery pack. Meanwhile, a rectangular cavity is arranged in the middle of the fixed beam 111, which is specially used to provide sufficient operation space for the milling disassembly operation of the battery pack.

[0045] The rotating shaft 112 is fixedly connected with the middle of the fixed beam 111, the connection is firm and not easy to loosen, and the fixed beam 111 is rotatably connected with the support part 12 through the rotating shaft 112. Bearings are arranged between the two ends of the rotating shaft 112 and the support part 12, which can effectively reduce the rotating friction, so that the turnover of the turnover assembly 11 is more smooth, and the labor intensity of the operator is reduced.

[0046] The operator can easily drive the rotating shaft 112 together with the fixed beam 111 and the battery pack to synchronously turn over by rotating the handle 113. The turnover process is stable, the turnover angle can be accurately controlled, and collision and damage of the battery pack due to too fast and violent turnover can be avoided.

[0047] In the embodiment, the initial station with the upper cover of the battery pack upward is defined as the first position, which is mainly used for pretreatment operation (discharge, emptying cooling liquid, removing the upper cover and internal components) of the battery pack. When the battery pack clamping mechanism 1 drives the battery pack to turn over 180° around the rotating shaft 112, the working station with the bottom plate 61 of the battery pack upward is defined as the second position, which is mainly used for core disassembly operations such as milling and pressing.

[0048] When the battery pack is in the first position and the second position respectively, the operator can rotate the positioning member 121, so that the positioning member 121 is rotated to below the fixed beam 111 and tightly abuts the bottom of the fixed beam 111, and the supporting action of the positioning member 121 is used to limit the fixed beam 111 from continuing to deflect around the rotating shaft 112, so as to realize the accurate positioning of the battery pack in the two stations, and the positioning operation is simple and convenient, without the need for an additional locking mechanism, effectively improving the operation efficiency.

[0049] Embodiment 2 This embodiment is based on embodiment 1, and provides a battery pack milling system, which is mainly used for completing the milling operation of the bottom plate 61 and part of the liquid cooling plate 62 of the battery pack, and providing a basis for subsequent heat treatment and separation process. The core structure further includes a milling tool assembly 2, which is connected with an external driving device and can realize flexible movement in the vertical and horizontal directions, accurately adjust the milling position and milling depth, and adapt to the milling requirements of battery packs of different specifications. The battery pack includes a bottom plate 61, a liquid cooling plate 62, a heat-conducting adhesive 63, and a battery 64, wherein the heat-conducting adhesive 63 is located between the liquid cooling plate 62 and the battery 64. The core function of the milling tool assembly 2 is to mill through the bottom plate 61 and at least part of the liquid cooling plate 62 of the battery pack, and to provide a passage for the subsequent softening of the heat-conducting adhesive 63 and the separation of the battery 64 by breaking the bottom plate 61 and at least part of the liquid cooling plate 62.

[0050] When the milling tool assembly 2 is working, the battery pack needs to be in the second position, i.e., the working station with the bottom plate 61 of the battery pack facing upward. The second position can be realized by the overturning assembly 11 of the battery pack disassembly positioning device. The positioning member 121 abuts against the bottom of the fixed beam 111 to realize stable positioning, so as to ensure that the battery pack does not shift or shake during the milling process. During the milling operation, the milling tool assembly 2 can pass through the cavity in the middle of the fixed beam 111 to mill the pre-set milling area of the bottom plate 61. At the same time, the milling speed and depth of the milling tool assembly 2 can be flexibly adjusted according to the size of the battery pack, the thickness of the bottom plate 61 and the liquid cooling plate 62, so as to ensure that the bottom plate 61 and part of the liquid cooling plate 62 can be milled through, and the internal battery 64 will not be damaged, effectively reducing the risk of damage to the battery cell.

[0051] Embodiment 3 The battery pack heat treatment device provided in the embodiment is based on the embodiments 1 and 2, and comprises a battery pack disassembling and positioning device. The core function of the battery pack disassembling and positioning device is to reduce the connection strength between the battery 64 and the liquid cooling plate 62 by softening the heat-conducting adhesive 63 between the liquid cooling plate 62 and the battery 64, so as to facilitate the smooth separation of the battery 64 in the subsequent pressing process. The heat treatment device further comprises an oven 3. The internal volume of the oven 3 is adapted to the battery pack clamping mechanism 1 and the battery pack that has been milled through by the battery pack milling system. The battery pack clamping mechanism 1 can be placed in the oven 3 together with the battery pack for heat treatment, without the need for additional disassembly of the battery pack, thereby simplifying the work process. The battery pack contains a plurality of batteries 64. The heat-conducting adhesive 63 is arranged between the liquid cooling plate 62 and the battery 64. The heat-conducting adhesive 63 is used to realize the heat-conducting connection between the liquid cooling plate 62 and the battery 64, thereby improving the heat dissipation performance of the battery pack. However, the heat-conducting adhesive 63 also brings difficulties to the subsequent disassembly and separation. Therefore, the working temperature in the oven 3 needs to be controlled at about 100°C. This temperature can effectively soften the heat-conducting adhesive 63 and reduce the adhesive strength thereof. Further, at least one side of the oven 3 is provided with a plurality of door curtains 31. The door curtains 31 are vertically hung. In the vertically hung state, there is a strip-shaped overlap between the adjacent edges of the two adjacent door curtains 31. The overlap can effectively reduce the loss of heat in the oven 3, ensure the stability of the temperature in the oven 3, and facilitate the operator to send or remove the battery pack clamping mechanism 1 together with the battery pack into or out of the oven 3 without the need to completely open the door body of the oven 3. The operation is convenient and energy-saving. The height of the door curtain 31 is greater than the height of the battery pack clamping mechanism 1 and the battery pack carried thereby, thereby facilitating the sending or removal of the battery pack. In order to ensure that the heat-conducting adhesive 63 is fully softened, the holding time of the working temperature of not less than 100°C in the oven 3 is not less than 45 minutes. The specific working temperature and holding time can be flexibly adjusted according to the specifications of the battery pack and the thickness of the heat-conducting adhesive 63. If the heat-conducting adhesive 63 is thicker, the holding time can be appropriately prolonged to ensure that the heat-conducting adhesive 63 is completely softened, thereby providing protection for the subsequent pressing and separation of the battery 64. This avoids the damage of the battery 64 caused by the incomplete softening of the heat-conducting adhesive 63 during pressing, and further improves the recovery rate of the battery cell. It should be noted that the battery pack milling system cooperates with the battery pack heat treatment device. The battery pack that has been milled is flexibly transferred to the side of the oven 3 by the universal wheels 122 of the support part 12 without manual carrying, thereby reducing the labor intensity of the operator and avoiding the collision and damage of the battery pack during the transfer process, and realizing the smooth connection of the milling and heat treatment processes.

[0052] Embodiment 4 On the basis of embodiments 1, 2, and 3, the battery pack pressing device comprises the battery pack disassembling and positioning device and the battery pack after the softening treatment by the battery pack heat treatment device. The battery pack pressing device further comprises a frame structure 4 and a pressing assembly 5, which are mainly used for pressing and separating the battery pack after milling and heat treatment softening, and realizing stable and lossless recovery of the battery cell 64.

[0053] The pressing assembly 5 is horizontally slidably connected with the frame structure 4 and can move in the horizontal direction along the frame structure 4, and the pressing assembly 5 can vertically move relative to the frame structure 4. In the pressing process, a stable pressing force is applied to the softened battery pack, so that the battery cell 64 is separated from the liquid cooling plate 62 and the bottom plate 61, thereby completing the recovery work of the battery cell 64.

[0054] During the pressing operation of the pressing assembly 5, the battery pack is kept in the second position, i.e., the working position with the bottom plate 61 facing upward, so that the pressing direction is consistent with the direction of the battery cell 64 being pulled out, thereby improving the separation efficiency and reducing the damage to the battery cell.

[0055] The frame structure 4 is provided with a horizontal guide rail 40, and the pressing assembly 5 comprises a sliding block assembly matched with the horizontal guide rail 40. Through the cooperation of the sliding block assembly and the horizontal guide rail 40, the pressing assembly 5 can move stably in the horizontal direction.

[0056] The pressing assembly 5 can move along the horizontal guide rail 40 to different working positions of the battery pack, and sequentially perform pressing actions on each compartment inside the battery pack, so that the battery cell 64 is gradually and stably pushed out and separated, thereby realizing complete recovery of all battery cells 64 in the battery pack.

[0057] The pressing assembly 5 further comprises a driving mechanism 50 and a telescopic part. The driving mechanism 50 is used to drive the telescopic part to move vertically and provide power for the pressing action. The telescopic part comprises, from top to bottom, a telescopic rod 51 and a first push plate 511 connected with the bottom of the telescopic rod 51. A second push plate 512 is elastically connected with the first push plate 511 through an elastic member 513, and the second push plate 512 is arranged opposite to the battery pack and used to directly contact and press the battery pack to complete the disassembling work.

[0058] The size of the second push plate 512 is matched with the size of a single compartment of the battery pack, and the pressing force can be uniformly transmitted to the corresponding compartment area, so that the force is balanced. One end of the elastic member 513 is fixedly connected with the first push plate 511, and the other end is fixedly connected with the second push plate 512. In the pressing process, the elastic member 513 plays a buffering role, so that the pressing force is more uniform.

[0059] It is worth noting that the elastic member 513 can compensate through its own telescopic function, so that the second push plate 512 is always well attached to the surface of the battery pack, further improving the reliability and integrity of the pressing and separating, reducing the damage rate of the battery, and improving the recovery yield.

[0060] The pressing assembly 5 further comprises a guide rod 514 penetrating the elastic member 513. One end of the guide rod 514 is fixedly connected with the second push plate 512, and the other end penetrates the first push plate 511 and is movably connected with the first push plate 511. The guide rod 514 is used for guiding the expansion and contraction movement of the elastic member 513, so that the second push plate 512 does not deviate or shake during the up and down movement, and the pressing movement is more stable and accurate.

[0061] As an optional embodiment, the first push plate 511 and the second push plate 512 are movably connected through a connecting rod 517. One end of the connecting rod 517 is fixedly connected with the second push plate 512, and the other end penetrates the penetrating hole of the first push plate 511 and continues to extend upward. The end of the connecting rod 517 away from the second push plate 512 is provided with a stop head, and the size of the stop head is larger than the size of the penetrating hole of the first push plate 511, so as to limit the escape stroke of the connecting rod 517.

[0062] The elastic member 513 is sleeved outside the guide rod 514. When the pressing assembly 5 is not in contact with the battery pack, the elastic member 513 is in a natural state or a slightly compressed state. At this time, the stop head of the connecting rod 517 abuts against the first push plate 511, so that the first push plate 511 and the second push plate 512 maintain a relatively stable positional relationship. When the elastic member 513 is compressed by pressure, the connecting rod 517 moves upward relative to the second push plate 512, and the stop head is separated from the first push plate 511, thereby realizing the function of buffering pressing.

[0063] Further, the sliding block assembly comprises a sliding block body 515 and a connecting plate 516 fixedly connected with the bottom of the sliding block body 515. As an optional embodiment, the driving mechanism 50 can be installed on the connecting plate 516. The connecting plate 516 is further provided with through holes for the penetrating of the telescopic rod 51 and the guide rod 514, so that the telescopic rod 51 and the guide rod 514 can smoothly penetrate the connecting plate 516 to perform up and down telescopic movement, thereby ensuring that the overall structural layout is compact, the movement is smooth, and the operation is stable.

[0064] The bottom of the telescopic rod 51 is provided with a pressure sensor 52, and the frame structure 4 is provided with a pressure display 41 corresponding to the pressure sensor 52. When the second push plate 512 cannot smoothly press the battery pack, the operator can manually adjust the pressure regulating valve 42 on the frame structure 4 according to the real-time value of the pressure display, so as to adjust the pressing pressure, ensure the stability and reliability of the pressing process, and avoid damaging the battery 64 due to excessive pressure or failing to separate due to insufficient pressure.

[0065] The frame structure 4 is further provided with a hand control valve 43. The operator can control the start and stop of the driving mechanism 50 through the hand control valve 43. The operation is simple and intuitive, and the execution and stop of the pressing action can be controlled in real time, thereby improving the safety and controllability of the operation process.

[0066] Through the above structure, the battery pack pressing device can realize stable pressing and separating of the battery pack, cooperate with the elastic buffer and guide structure, can ensure sufficient pressing force, and can effectively protect the battery core 64 from being damaged, the overall structure is stable, simple to operate, and meets the needs of large batch automatic disassembly operation.

[0067] Embodiment 5 The embodiment provides a battery pack disassembly method, and the steps are as follows: Positioning and fixing: fix the battery pack to be disassembled on the fixed beam 111 of the turnover assembly 11 in embodiment 1, so that the upper cover of the battery pack faces upwards and is in the first position, the positioning piece 121 on the supporting part 12 abuts against the bottom of the fixed beam 111, and the deflection of the turnover assembly 11 is limited. The battery pack to be disassembled is subjected to discharging treatment, so that the battery pack has no residual electricity, then the cooling liquid in the liquid cooling plate 62 of the battery pack is emptied, after the pretreatment is completed, the upper cover of the battery pack is removed, and the equalization wire harness and the pressure sensor in the battery pack are removed.

[0068] Turnover and position change: rotate the rotating handle 113 to drive the rotating shaft 112 and the fixed beam 111 to synchronously turn over, so that the bottom plate 61 of the battery pack faces upwards and is in the second position, and the positioning piece 121 is abutted against the bottom of the fixed beam 111 again, so that the positioning and fixing of the battery pack operation station are realized.

[0069] Milling operation: the milling cutter assembly 2 of the battery pack milling system in embodiment 2 is used to mill through the bottom plate 61 and at least part of the liquid cooling plate 62 of the battery pack through the cavity in the middle of the fixed beam 111.

[0070] Thermal treatment softening: the battery pack after milling is sent into the oven 3 of the battery pack heat treatment device in embodiment 3 together with the battery pack disassembly positioning device, the working temperature and the holding time in the oven 3 are controlled, and the thermal conductive adhesive 63 between the liquid cooling plate 62 and the battery 64 is softened.

[0071] Pressing and recycling: the battery pack after thermal treatment softening is moved out of the oven 3 together with the battery pack disassembly positioning device, the battery pack remains in the second position, the battery pack pressing device in embodiment 4 is used, the lower pressing assembly 5 slides to the upper side of the battery pack along the horizontal guide rail 40 of the frame structure 4, the telescopic part is vertically moved by the driving mechanism 50, the battery pack is pressed by the second pressing plate 512, the battery 64 is stably separated under the cooperation of the elastic member 513 and the guide rod 514, and the separated battery 64 directly falls on the base plate 123 of the supporting part 12, and the recycling is completed.

[0072] The above describes the present application and its embodiments in a schematic manner, and the description is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, and all of them shall belong to the protection scope of the present application.

Claims

1. A battery pack disassembly and positioning device, characterized in that: The battery pack clamping mechanism (1) includes a flipping component (11) and a support part (12) rotatably connected to the flipping component (11). The flipping component (11) is used to drive the battery pack to flip synchronously. The support (12) has several positioning members (121) rotatably connected to its top. The positioning members (121) can restrict the flipping assembly (11) and the battery pack from continuing to flip.

2. The battery pack disassembly and positioning device according to claim 1, characterized in that: The flipping component (11) includes, A fixed beam (111) is used to fix the battery pack, and the bottom surface of the battery pack is opposite to the fixed beam (111). A cavity is provided in the middle of the fixed beam (111), and the cavity is used to provide operating space for the milling and disassembly of the battery pack. A rotating shaft (112) is fixedly connected to a fixed beam (111), and the fixed beam (111) is rotatably connected to a support (12) via the rotating shaft (112). Rotate the handle (113), which is fixedly connected to the rotating shaft (112). The handle (113) is used to drive the rotating shaft (112) and the fixed beam (111) to rotate synchronously.

3. The battery pack disassembly and positioning device according to claim 2, characterized in that: The initial position with the top cover of the battery pack facing upwards is defined as the first position; When the battery pack clamping mechanism (1) drives the battery pack to rotate around the rotating shaft (112), the working position with the bottom plate (61) of the battery pack facing upward is defined as the second position; When the battery pack is in the first position and the second position respectively, the positioning member (121) can rotate to the bottom of the fixed beam (111) and abut against the bottom of the fixed beam (111) to limit the fixed beam (111) from continuing to deflect around the rotation axis (112).

4. The battery pack disassembly and positioning device according to claim 1, characterized in that: At least two positioning elements (121) are provided; when two are provided, the positioning elements (121) are located at the diagonal position of the support part (12).

5. A battery pack disassembly and positioning device according to claim 1, characterized in that: The support part (12) is a frame structure, and its bottom is provided with several casters (122).

6. The battery pack disassembly and positioning device according to claim 1, characterized in that: A pad (123) is provided below the support (12). The pad (123) is located directly below the battery pack, and the orthographic projection of the battery pack on the plane of the pad (123) always falls completely within the bearing range of the pad (123).

7. A battery pack milling system, comprising the battery pack disassembly and positioning device according to any one of claims 1-6, characterized in that: It also includes a milling tool assembly (2) for milling through the bottom plate (61) of the battery pack and at least part of the liquid cooling plate (62). When the milling tool assembly (2) is working, the battery pack is in the second position.

8. A battery pack heat treatment apparatus, comprising the battery pack disassembly and positioning device according to any one of claims 1-6, characterized in that: It also includes an oven (3) capable of accommodating the battery pack clamping mechanism (1) and the battery pack milled by the battery pack milling system of claim 7; The battery pack includes a plurality of batteries (64), and thermally conductive adhesive (63) is provided between the liquid cooling plate (62) and the batteries (64); the oven (3) is used to soften the thermally conductive adhesive (63).

9. A battery pack heat treatment apparatus according to claim 8, characterized in that: The oven (3) has at least one side equipped with several curtains (31), and two adjacent curtains (31) overlap in strips when hanging; the height of the curtains (31) is greater than the height of the battery pack clamping mechanism (1) and the battery pack it carries.

10. A battery pack heat treatment apparatus according to claim 8, characterized in that: The working temperature inside the oven (3) shall not be lower than 100℃ and the heat preservation time shall not be less than 45 minutes.

11. A battery pack pressing device, comprising the battery pack disassembly and positioning device according to any one of claims 1-6 and the battery pack softened by the battery pack heat treatment device according to claim 8, characterized in that: It also includes, Framework structure (4), The pressing component (5) is horizontally slidably connected to the frame structure (4). The pressing component (5) is capable of vertical movement relative to the frame structure (4). The pressing component (5) is used to press down the softened battery pack to recover the battery (64). When the pressing component (5) is pressed down, the battery pack is in the second position.

12. A battery pack pressing device according to claim 11, characterized in that: The frame structure (4) is provided with a horizontal guide rail (40); the pressing component (5) includes a slider component adapted to the horizontal guide rail (40).

13. A battery pack pressing device according to claim 12, characterized in that: The pressing component (5) further includes a driving mechanism (50) and a telescopic part; wherein the driving mechanism (50) is used to drive the telescopic part to move vertically; The telescopic part includes, from top to bottom, a telescopic rod (51) and a first push plate (511) connected to the bottom of the telescopic rod (51); the second push plate (512) is elastically connected to the first push plate (511) through an elastic member (513), and the second push plate (512) is opposite to the battery pack and is used to disassemble the battery pack; One end of the elastic element (513) is fixedly connected to the first push plate (511), and the other end is fixedly connected to the second push plate (512).

14. A battery pack pressing device according to claim 13, characterized in that: The pressing assembly (5) also includes a guide rod (514) passing through the elastic member (513). One end of the guide rod (514) is fixedly connected to the second push plate (512), and the other end passes through the first push plate (511) and is movably connected to the first push plate (511). The guide rod (514) is used to guide the extension and retraction movement of the elastic member (513).

15. A method for disassembling a battery pack, characterized in that: Positioning and fixing: Fix the battery pack to be disassembled on the clamping mechanism of the battery pack disassembly positioning device according to any one of claims 1-6, so that the top cover of the battery pack is facing upward in the first position, rotate the positioning member on the support to abut against the bottom of the fixing beam of the flipping assembly, and restrict the deflection of the flipping assembly; discharge the battery pack to be disassembled, then drain the coolant in the liquid cooling plate of the battery pack, remove the top cover of the battery pack, and remove the equalization harness and pressure sensor inside the battery pack; Flipping and repositioning: Rotating the handle drives the rotating shaft and the fixed beam to flip synchronously, so that the bottom plate of the battery pack faces upward and is in the second position. Rotating the positioning piece again abuts against the bottom of the fixed beam to achieve positioning and fixing of the battery pack working position. Milling operation: using the milling tool assembly of the battery pack milling system of claim 7 to mill through the bottom plate and at least part of the liquid cooling plate of the battery pack; Heat treatment softening: The milled battery pack, together with the battery pack disassembly and positioning device, is sent into the oven of the battery pack heat treatment device according to any one of claims 8-10, and the working temperature and heat preservation time in the oven are controlled to soften the thermally conductive adhesive between the liquid cooling plate and the battery. Downward Recycling: The heat-treated and softened battery pack, along with the battery pack disassembly and positioning device, is removed from the oven. The battery pack is kept in the second position. Using the battery pack downward pressing mechanism described in any one of claims 11-14, the downward pressing component slides along the horizontal guide rail of the frame structure to directly above the battery pack. The telescopic part is driven to move vertically by the drive mechanism. The battery pack is pressed down by the second push plate. Under the cooperation of the elastic element and the guide rod, the battery is separated. The separated battery falls onto the pad of the support part, and the recycling is completed.

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