Battery recycling and disassembling equipment

Abstract

The utility model provides battery recycling and disassembling equipment. The utility model provides battery recycling and disassembling equipment. The battery recycling and disassembling equipment comprises a disassembling part for disassembling a positive pole piece in a pole core of lithium iron phosphate and an infiltrating and flushing part for infiltrating and flushing the positive pole piece, the infiltrating and flushing part comprises a soaking pool and at least one spraying frame; the disassembling part comprises a first rack, a recycling roller set arranged on the first rack and a first driving assembly arranged on the first rack and used for driving the recycling roller set. The battery recycling and disassembling equipment provided by the utility model has the beneficial effects that the battery recycling and disassembling equipment provided by the utility model is suitable for the battery recycling and disassembling method, is simple in structure and easy to implement, and is specially used for disassembling the pole core of the lithium iron phosphate battery; the positive pole piece in the pole core is separated from other parts, so that the stripping efficiency and the stripping quality of the positive current collector and the positive active material in the positive pole piece are high.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery disassembly technical field especially is related to a battery recycling disassembly equipment BACKGROUND

[0002] With the continuous development of electric vehicle industry in China, the battery industry also has a burst development. The lithium iron phosphate battery is the mainstream product of the power battery at present, because it has the characteristics of long service life, large capacity, safety and environmental protection, and has a great market share. In the production and processing process of lithium iron phosphate battery, a part of scrap batteries that do not meet the production and processing requirements will appear, and the part of lithium iron phosphate batteries that have not completed the whole processing process has been scrapped, which needs to be recycled in the battery recycling market for recycling and reuse. A larger part of lithium iron phosphate batteries reaches the service life, and according to the national regulations, they are retired and enter the battery recycling market for recycling and reuse. No matter what situation the lithium iron phosphate battery enters the battery recycling market, it needs to go through the recycling process of detection, classification, repair, reorganization, gradient utilization, or scrap and disassembly. Among them, for some lithium iron phosphate batteries that meet part of the scene use conditions, they can be used in new fields; and for the lithium iron phosphate batteries that do not meet the use standard, they need to be disassembled, and the effective materials are extracted for recycling and reuse, so as to minimize the pollution caused by the scrap of lithium iron phosphate batteries to the environment.

[0003] At present, the main recovery methods of lithium iron phosphate battery in the industry are dry recovery, wet recovery and physical recovery. Among them, the wet recovery mainly extracts metal ions in the electrode material by using acid and alkali solution, immerses in the solution, and then extracts the metal ions in the solution in the form of metal compound by ion exchange, precipitation, extraction and crystallization. Wet recovery is the most commonly used method in the industry, but the processing method of wet recovery needs to use various chemical reagents, and the wastewater needs to be treated before discharge, which has high cost, and the wet process is more, the recovery material time is longer, and the efficiency is low.

[0004] Dry method recovery, also known as pyrometallurgical recovery, first discharges the battery, then separates the shell and electrode material through vibration screening and magnetic separation, then puts the electrode material into high temperature for burning, and finally screens fine powder material containing metal and metal oxide. However, this method can only effectively recover the electrode material, and the recovery rate of the positive or negative electrode sheet is low, and the incineration requires a large amount of energy consumption. Physical recovery refers to a series of means such as crushing, screening, magnetic separation, fine crushing and classification, to obtain a part of valuable materials, and then recycle the valuable materials for repair. Although the processing efficiency of physical recovery is low, it does not consume other chemicals, and the process is very environmentally friendly. Both dry method recovery and physical recovery cannot obtain complete aluminum foil, and the recovery rate of the positive active material on the positive electrode sheet is low, and are not suitable for the recovery of the positive material of the lithium iron phosphate battery.

[0005] In Chinese Publication No. CN118572232A, a separation and recovery device and method for lithium iron phosphate battery positive material are provided, which indicates in step 5 that the side of the expanded aluminum foil coated with lithium iron phosphate material is polished by a polishing wheel to separate the positive lithium iron phosphate powder. The way of obtaining the positive active material by polishing wheel polishing is easy to damage the aluminum foil in the process of polishing, so that the quality of the recovered aluminum foil is poor, and a large amount of aluminum appears in the lithium iron phosphate powder. Therefore, the recovery device and method provided by the present application cannot avoid damaging the aluminum foil, so that the aluminum foil is severely damaged, and a large amount of aluminum is mixed in the obtained lithium iron phosphate powder, so that high-purity positive active material cannot be obtained. Therefore, how to effectively recover the positive material of the lithium iron phosphate battery, obtain high-purity positive active material and relatively complete aluminum foil, and how to improve the production efficiency and recovery efficiency of the lithium iron phosphate battery recovery are urgent problems to be solved in the battery recovery industry. Practical new type content

[0006] The utility model discloses a battery recovery and disassembly equipment, which solves the problems of low production efficiency and low recovery efficiency in the recovery process of the existing lithium iron phosphate battery, and cannot avoid damaging the aluminum foil, so that the recovered aluminum foil is severely damaged, and a large amount of aluminum is mixed in the obtained lithium iron phosphate powder.

[0007] The utility model discloses a battery recovery and disassembly equipment, which solves the problems of low production efficiency and low recovery efficiency in the recovery process of the existing lithium iron phosphate battery, and cannot avoid damaging the aluminum foil, so that the recovered aluminum foil is severely damaged, and a large amount of aluminum is mixed in the obtained lithium iron phosphate powder. The technical scheme adopted by the utility model to solve its technical problem is: a battery recovery and disassembly equipment, which comprises a disassembly part for disassembling the positive electrode sheet in the lithium iron phosphate core and a soaking and flushing part for soaking and flushing the positive electrode sheet. The soaking and flushing part comprises a soaking pool for soaking the positive electrode sheet and at least one spraying frame arranged on the soaking pool for soaking and flushing the positive electrode sheet. The disassembly part comprises a first rack, a recovery roller group arranged on the first rack, and a first driving assembly arranged on the first rack for driving the recovery roller group.

[0008] In one of the embodiments, the recovery roller set comprises a first separator recovery roller and a second separator recovery roller fixed on the first frame and arranged oppositely in the vertical direction, and a positive electrode stripping roller and a negative electrode recovery roller fixed on the first frame and arranged oppositely in the horizontal direction, and the soaking and flushing part is located below the positive electrode stripping roller.

[0009] In one of the embodiments, the first separator of the pole core is wound on the first separator recovery roller, the second separator of the pole core is wound on the second separator recovery roller, and the negative electrode sheet of the pole core is wound on the negative electrode recovery roller; the positive electrode sheet is driven by the positive electrode stripping roller into the soaking and flushing part.

[0010] In one of the embodiments, the rotation rate of the positive electrode stripping roller is greater than the rotation rate of the first separator recovery roller and / or the second separator recovery roller.

[0011] In one of the embodiments, the rotation rates of the first separator recovery roller and the second separator recovery roller are the same.

[0012] In one of the embodiments, the rotation rate of the negative electrode recovery roller is equal to the rotation rate of the first separator recovery roller and / or the second separator recovery roller.

[0013] In one of the embodiments, the first driving assembly comprises a first driving member for driving the positive electrode stripping roller to rotate, a second driving member for driving the negative electrode recovery roller to rotate, and a transmission member for transmissionally connecting the second driving member with the first separator recovery roller and the second separator recovery roller.

[0014] In one of the embodiments, the battery recycling and disassembling device further comprises a current collector recovery assembly; the current collector recovery assembly comprises a second frame located above the soaking and flushing part, a positive electrode current collector recovery roller arranged on the second frame, and a third driving member for driving the positive electrode current collector recovery roller to rotate.

[0015] In one of the embodiments, the soaking pool of the soaking and flushing part comprises a pool body and a first control assembly arranged in the pool body for controlling the water temperature in the pool body.

[0016] In one of the embodiments, the soaking pool of the soaking and flushing part further comprises a recovery blue arranged in the pool body and a fourth driving assembly arranged in the pool body for driving the recovery blue to lift and lower relative to the pool body.

[0017] In one of the embodiments, the soaking and flushing part is provided with two spray frames, and the two spray frames are respectively located at the two end portions of the soaking pool.

[0018] In one of the embodiments, the spray frame of the infiltration flushing part comprises at least one support frame, and a plurality of spray heads are arranged on each of the support frames.

[0019] In one of the embodiments, the support frame is provided with a second control component for controlling the water pressure of the spray heads and a third control component for regulating the water temperature of the spray heads.

[0020] In one of the embodiments, the spray frame of the infiltration part comprises two support frames, and the spray heads of the two support frames are oppositely arranged, and the positive pole piece passes through between the two support frames.

[0021] The battery recycling and disassembling equipment provided by the utility model has the advantages that the battery recycling and disassembling equipment provided by the utility model is applicable to the battery recycling and disassembling method, the battery recycling and disassembling equipment is simple in structure and easy to realize, is specially used for disassembling the pole core of a lithium iron phosphate battery, separates the positive pole piece in the pole core from other parts, has high peeling efficiency and quality of the positive pole current collector and the positive active material in the positive pole piece, on one hand, the completeness of the positive pole current collector is high, and on the other hand, the recycling process does not increase the aluminum content in the positive active material, thereby realizing efficient recycling of the positive active material of the lithium iron phosphate battery; the battery recycling and disassembling equipment can obtain the complete positive pole current collector and the high-purity positive active material, realizes high separation efficiency of the positive pole piece, can not only improve the recycling production efficiency of the positive pole current collector and the positive active material of the lithium iron phosphate battery but also improve the recycling efficiency of the positive pole current collector and the recycling quality of the positive active material. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0023] Figure 1 is a cross-sectional view of the pole core of the lithium iron phosphate battery provided by the utility model;

[0024] Figure 2 is a cross-sectional view of the positive pole piece in the pole core of the lithium iron phosphate battery provided by the utility model;

[0025] Figure 3 is a flow chart of the battery recycling and disassembling method provided by the first embodiment of the utility model;

[0026] Figure 4It is a three-dimensional structure schematic view of a battery recycling and disassembling equipment provided by the first embodiment of the utility model;

[0027] Figure 5 It is a three-dimensional structure schematic view of a disassembling assembly in a battery recycling and disassembling equipment provided by the first embodiment of the utility model;

[0028] Figure 6 It is a three-dimensional structure schematic view of a first rack in a battery recycling and disassembling equipment provided by the first embodiment of the utility model;

[0029] Figure 7 It is a flow chart of a battery recycling and disassembling method provided by the second embodiment of the utility model;

[0030] Figure 8 It is a three-dimensional structure schematic view of a battery recycling and disassembling equipment provided by the second embodiment of the utility model;

[0031] Figure 9 It is a three-dimensional structure schematic view of a current collector recycling assembly in a battery recycling and disassembling equipment provided by the second embodiment of the utility model;

[0032] Figure 10 It is a three-dimensional structure schematic view of an infiltration flushing part in a battery recycling and disassembling equipment provided by the second embodiment of the utility model.

[0033] Explanation of reference signs:

[0034] 100, 101 - battery recycling and disassembling equipment;

[0035] 10 - pole core, 11 - first diaphragm, 12 - positive pole piece, 13 - second diaphragm, 14 - negative pole piece;

[0036] 121 - positive current collector, 122 - carbon base coating, 123 - positive active material layer,

[0037] 20 - infiltration flushing part, 21 - soaking pool, 22 - first spraying frame, 23 - spraying head, 24 - second spraying frame;

[0038] 30 - disassembling part, 31 - first rack, 32 - recycling roller group, 33 - first driving assembly;

[0039] 311 - horizontal support plate, 312 - vertical support plate, 313 - first mounting plate, 314 - second mounting plate, 315 - limiting plate;

[0040] 321 - first diaphragm recycling roller, 322 - second diaphragm recycling roller, 323 - positive stripping roller, 324 - negative recycling roller;

[0041] 331 - first drive member, 332 - second drive member, 333 - transmission member

[0042] 40 - current collector recovery assembly, 41 - second frame, 42 - positive current collector recovery roller, 43 - third drive member. DETAILED DESCRIPTION

[0043] In order to make the technical problems solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0044] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Referring to Figure 1 The cross-sectional view of the pole core 10 structure of the lithium iron phosphate battery provided by the present application. The pole core 10 of the lithium iron phosphate battery that can be disassembled by the battery recycling and disassembling equipment 101 (100) provided by the present application is as shown in Figure 1 , which includes positive pole piece 12, diaphragm and negative pole piece 14 which are sequentially stacked and wound. During the stacking and winding process, the diaphragm separates the positive pole piece 12 and the negative pole piece 14, and the winding forms a columnar structure, and then the pole core 10 is placed in a metal shell to form a lithium iron phosphate battery. Among them, the diaphragm of the pole core 10 forms a first diaphragm 11 and a second diaphragm 13 on both sides of the positive pole piece 12 after stacking and winding, as shown in Figure 1 .

[0047] The battery recycling and dismantling equipment 101 (100) provided by this utility model is specifically designed for recycling and dismantling the positive electrode 12 in the core 10 of a lithium iron phosphate battery. The structure of the positive electrode 12 in the core 10 is as follows: Figure 2 As shown, the positive electrode 12 includes a positive current collector 121 and a positive active material layer 123 disposed on at least one side of the positive current collector 121. Furthermore, the positive electrode 12 also includes a carbon substrate coating 122 disposed between the positive active material layer 123 and the positive current collector 121. During the processing of the positive electrode 12 of the lithium iron phosphate battery, the carbon substrate coating 122 is first coated on the surface of the positive current collector 121, and then the positive active material layer 123 is coated on the outer surface of the carbon substrate coating 122. The carbon substrate coating 122 allows the positive active material layer 123 to be well formed on the positive current collector 121. In the battery recycling and dismantling equipment 101 (100) provided by this invention, the carbon substrate coating 122 is a water-soluble substance that can dissolve in water, thereby separating the positive active material layer 123 from the positive current collector 121.

[0048] Furthermore, the battery recycling and dismantling equipment 101 (100) provided by this utility model is specifically designed for lithium iron phosphate batteries, therefore the positive electrode current collector 121 in the electrode core 10 is made of aluminum foil. The battery recycling and dismantling equipment 101 (100) provided by this utility model is specifically designed for dismantling and recycling the positive electrode sheet 12 of this structure. After melting the carbon substrate coating 122 of the positive electrode sheet 12 with warm water, the positive active material layer 123 and the positive electrode current collector 121 are separated, allowing for the separate recycling of the positive active material layer 123 and the positive electrode current collector 121. Compared to other battery positive electrode material recycling equipment that requires grinding the positive active material layer 123, this method yields a more complete positive electrode current collector 121 and solves the problem of aluminum doping in the recycled positive active material, resulting in higher purity and extremely low aluminum content in the recycled material.

[0049] Example 1:

[0050] like Figures 3-6 As shown, this is a battery recycling and dismantling method and battery recycling and dismantling equipment 101 provided in the first embodiment of this utility model.

[0051] The following is combined with, for example Figure 3 This invention describes a battery recycling and dismantling method according to a first embodiment. The battery recycling and dismantling method provided by this invention includes the following steps.

[0052] S0: Pre-treatment: Remove the casing of the lithium iron phosphate battery to obtain the electrode core 10. The purpose of this pre-treatment step is to obtain the electrode core 10 of the discarded lithium iron phosphate battery. Therefore, it is necessary to disassemble the casing of the discarded lithium iron phosphate battery and obtain the electrode core 10 inside the disassembled casing. This pre-treatment step is not performed in the battery recycling and dismantling equipment 101 of the positive electrode sheet 12 of the lithium iron phosphate battery provided in this utility model. It can be completed using existing battery decasing equipment on the market. The disassembled electrode core 10 is then recycled using the battery recycling and dismantling equipment 101 provided in this utility model. The discarded lithium iron phosphate battery can be a cylindrical battery, a square aluminum-cased battery, or a soft-pack aluminum-plastic film battery. Regardless of the structure, it can be fully discharged, the electrolyte recovered, and the casing removed to obtain the complete electrode core 10.

[0053] The battery recycling and dismantling method and battery recycling and dismantling equipment 101 provided by this utility model have already removed the electrolyte from the dismantled electrode core 10, meaning there is no electrolyte on the electrode core 10. However, during the pretreatment process, how to discharge the scrapped lithium iron phosphate battery and recover the electrolyte, as well as how to remove the electrolyte from the scrapped electrode core 10, are not covered by this utility model. Any measures in the prior art can be used to achieve the discharge and electrolyte recovery of the lithium iron phosphate battery.

[0054] In this embodiment, the electrode core 10 used is a electrode core 10 that was determined to be unqualified before electrolyte injection during the processing. Therefore, the electrode core 10 not only has no residual electrolyte, but can also be directly recycled and dismantled in the battery recycling and dismantling equipment 101.

[0055] S1: The positive electrode sheet is peeled off from the electrode core 10 to obtain the positive electrode sheet 12. The purpose of step S1 is to remove the positive electrode sheet 12 from the electrode core 10 separately, thereby performing specific recycling of the positive electrode sheet 12. In this embodiment, a first separator 11 and a second separator 13 are formed on both sides of the positive electrode sheet 12, respectively. The separators need to be peeled off from both sides of the positive electrode sheet 12 to obtain the complete positive electrode sheet 12. Therefore, in step S1, the battery recycling and dismantling equipment 101 provided by this utility model is used to dismantle the electrode core 10. Step S1 specifically includes the following steps:

[0056] S11: The first diaphragm 11 located on one side of the positive electrode plate 12 is rewound and wound, such as... Figure 1 As shown, in step S11, the first diaphragm 11 located at the bottom of the positive electrode 12 is recycled and wound. During the recycling and winding process, the first diaphragm 11 is peeled off from the bottom surface of the positive electrode 12, so that the bottom surface of the positive electrode 12 is completely exposed.

[0057] S12: the second diaphragm 13 on the other side of the positive pole piece 12 is recycled and wound; as shown in S12, the second diaphragm 13 on the top of the positive pole piece 12 is recycled and wound, and in the process of recycling and winding, the second diaphragm 13 is peeled off from the top surface of the positive pole piece 12, so that the top surface of the positive pole piece 12 is completely exposed. Figure 1

[0058] S13: the negative pole piece 14 is recycled and wound, as shown in S13, the negative pole piece 14 above the second diaphragm 13 is recycled and wound, and in the process of recycling and winding, the side of the second diaphragm 13 connected with the negative pole piece 14 is peeled off, so that the negative pole piece 14 is obtained alone. Figure 1

[0059] S14: and drive the positive pole piece 12 to move, in the S1 step of the utility model, the S11 step, the S12 step, the S13 step and the S14 step are carried out at the same time, that is, in the process of recycling and winding the first diaphragm 11, the second diaphragm 13 is recycled and wound at the same time, in the process of recycling and winding the negative pole piece 14, the positive pole piece 12 is also peeled off at the same time, and the positive pole piece 12 is completely exposed along the two side surfaces in the thickness direction, and then moves along with the winding process of the two diaphragms, so that the complete positive pole piece 12 is obtained.

[0060] The S1 step of the battery recycling and disassembling method provided by the utility model can be completely applied to the battery recycling and disassembling equipment 101 provided by the utility model, and the peeling off of the positive pole piece 12 in the pole core 10 is completed by the battery recycling and disassembling equipment 101.

[0061] S2: the positive pole piece 12 is infiltrated and washed, in the first embodiment of the utility model, the S2 step includes spraying the side surface of the side of the positive pole piece 12 with the positive active material layer 123 before S3: the positive pole piece 12 is soaked. The purpose of the S2 step is to first infiltrate the carbon base coating layer 122 between the positive active material layer 123 and the positive current collector 121 before the positive active material layer 123 on the positive pole piece 12 is completely soaked and peeled off from the positive current collector 121, so that the carbon base coating layer 122 can be completely infiltrated by warm water, so that the positive active material layer 123 and the positive current collector 121 are loose, and the positive pole piece 12 will not be mutually adhered when stacking in the subsequent S3 step, the carbon base coating layer 122 can be fully infiltrated and separated from each other when the positive pole piece 12 is stacked and soaked, and will not be adhered together due to stacking and soaking, so that the recycling efficiency and quality of the positive pole piece 12 can be improved.

[0062] ​​In the first embodiment of the utility model, when the positive pole sheet 12 is infiltrated and washed, the spraying pressure is 0.15MPa-0.35MPa; the spraying pressure can be controlled at 0.15MPa, 0.2MPa, 0.25MPa, 0.3MPa, 0.35MPa or any value between any two of the above value ranges. At this time, the purpose of spraying is to infiltrate the carbon base coating 122 in the side of the positive pole sheet 12 with the positive pole active material layer 123, so that the carbon base coating 122 can be completely infiltrated before the positive pole sheet 12 is completely soaked, and the sprayed warm water is slightly dissolved. At this time, the water pressure of the spraying only needs to ensure that the warm water can slowly infiltrate the carbon base coating 122 of the positive pole sheet 12. Preferably, the spraying pressure is 0.15MPa-0.25MPa. If the water pressure is lower than 0.15MPa, the water flow is too weak to achieve the effect of spraying and complete infiltration. If the water pressure is higher than 0.25MPa, the water flow is too fast to achieve the effect of slow infiltration, and part of the carbon base coating 122 in the spraying area may be soaked by the warm water, while part of the area does not achieve infiltration, and the effect of slow infiltration is not good, and it cannot be covered comprehensively. If the water pressure is higher than 0.35MPa, the water flow is too fast, which can easily damage the positive pole sheet 12 during spraying, which is not conducive to the recovery of the positive pole sheet 12. Further, preferably, in the S2 step, the spraying pressure is 0.2MPa.

[0063] In the first embodiment of the utility model, when the positive pole sheet 12 is infiltrated and washed, the spraying temperature is 30℃-90℃. The spraying temperature is 30℃, 35℃, 38℃, 40℃, 45℃, 50℃, 52℃, 55℃, 58℃, 60℃, 65℃, 67℃, 70℃, 72℃, 75℃, 79℃, 80℃, 82℃, 85℃, 88℃, 90℃ or any value between any two of the above value ranges. At this time, the purpose of spraying is to partially dissolve the carbon base coating 122 before the positive pole sheet 12 is completely soaked, so the water temperature of the warm water spraying can be lower than the water temperature during subsequent soaking, and preferably the spraying temperature is 40℃-70℃. If the temperature is too high, there may be safety hazards in the working environment of battery recycling and disassembly, the sprayed water may splash outside the equipment, causing unnecessary safety problems, and the high spraying temperature also consumes a lot of energy, which is not conducive to the economic benefit of recycling and disassembly. If the temperature is too low, the effect of early infiltration cannot be achieved. Preferably, in the S2 step, the spraying temperature is 55℃.

[0064] S3: soaking the positive electrode sheet 12. The purpose of the S3 step is to completely dissolve the carbon base coating layer 122 on the positive electrode sheet 12 by warm water soaking, so as to completely separate the positive electrode active material layer 123 and the positive electrode current collector 121, and achieve separate recovery of the positive electrode current collector 121 and the positive electrode active material layer 123. The S3 step specifically includes completely soaking the positive electrode sheet 12 in the recovery liquid, so that the positive electrode active material layer 123 and the positive electrode current collector 121 of the positive electrode sheet 12 are separated from each other in the recovery liquid. The recovery liquid in the S3 step is set for different carbon base coating layers 122, and the function of the recovery liquid is to dissolve the carbon base coating layer 122. In this embodiment, the carbon base coating layer 122 is a water-soluble material, so the recovery liquid in the S3 step is water. By soaking in warm water, the carbon base coating layer 122 on the surface of the positive electrode current collector 121 is completely dissolved, and the positive electrode active material layer 123 and the positive electrode current collector 121 are completely separated.

[0065] In the first embodiment of the battery recycling and disassembling method provided in the utility model, when the positive electrode sheet 12 is soaked, the temperature of the recovery liquid is 30-90℃. The temperature of the recovery liquid is 30℃, 32℃, 36℃, 40℃, 43℃, 50℃, 54℃, 55℃, 57℃, 60℃, 62℃, 66℃, 70℃, 74℃, 75℃, 77℃, 80℃, 82℃, 85℃, 88℃, 90℃ or any value between any two of the above values. The lower the temperature of the recovery liquid, the slower the dissolution rate of the carbon base coating layer 122 in the positive electrode sheet 12, and the lower the recovery efficiency. Correspondingly, the higher the temperature of the recovery liquid, the faster the dissolution rate of the carbon base coating layer 122, and the higher the recovery efficiency. Preferably, the temperature of the recovery liquid is 55-90℃. If the temperature is lower than 55℃, the dissolution rate of the carbon base coating layer 122 cannot keep up with the peeling rate of the positive electrode sheet 12, and the positive electrode active material layer 123 may not be completely separated, and the positive electrode active material layer 123 may remain on the positive electrode current collector 121. If the temperature is higher than 90℃, the working environment of the battery recycling and disassembling method may have safety hazards, and the energy consumption cost of the recovery liquid at high temperature is high, and the recovery benefit is reduced.

[0066] In the first embodiment provided by the utility model, when the positive pole piece 12 is soaked, the soaking time is greater than 5 seconds, if the positive pole piece 12 is not soaked for enough time, the carbon base coating 122 is not completely dissolved, which causes the separation between the positive active material layer 123 and the positive pole current collector 121 to be not complete, and it is not conducive to obtaining the complete positive pole current collector 121. If the positive pole piece 12 is soaked for too long, either the size of the soaking pool 21 in the infiltration flushing part 20 needs to be increased, which is not conducive to the arrangement of the battery recycling and disassembling equipment 101, or the energy consumption in the soaking pool 21 is too large, the soaking temperature needs to be maintained for a long time, and high-efficiency recycling cannot be realized. Preferably, the time for the positive pole piece 12 to be completely soaked in the infiltration flushing part 20 is controlled to be between 10 seconds and 15 seconds.

[0067] The battery recycling and disassembling method provided by the utility model can separate the positive pole current collector 121 and the positive active material layer 123 in the positive pole piece 12 of the lithium iron phosphate without violent destruction of the lithium iron phosphate positive pole piece 12, so that the positive pole current collector 121 is recycled efficiently and with high quality, and the aluminum content in the positive active material is not increased during the whole recycling process, so that the positive active material can be recycled efficiently and with high purity.

[0068] The battery recycling and disassembling method provided by the utility model can separate the positive pole current collector 121 and the positive active material layer 123 in the positive pole piece 12 of the lithium iron phosphate without violent destruction of the lithium iron phosphate positive pole piece 12, so that the positive pole current collector 121 is recycled efficiently and with high quality, and the aluminum content in the positive active material is not increased during the whole recycling process, so that the positive active material can be recycled efficiently and with high purity. Figures 4-6 The battery recycling and disassembling method provided by the utility model can separate the positive pole current collector 121 and the positive active material layer 123 in the positive pole piece 12 of the lithium iron phosphate without violent destruction of the lithium iron phosphate positive pole piece 12, so that the positive pole current collector 121 is recycled efficiently and with high quality, and the aluminum content in the positive active material is not increased during the whole recycling process, so that the positive active material can be recycled efficiently and with high purity.

[0069] The battery recycling and disassembling method provided by the utility model can separate the positive pole current collector 121 and the positive active material layer 123 in the positive pole piece 12 of the lithium iron phosphate without violent destruction of the lithium iron phosphate positive pole piece 12, so that the positive pole current collector 121 is recycled efficiently and with high quality, and the aluminum content in the positive active material is not increased during the whole recycling process, so that the positive active material can be recycled efficiently and with high purity. Figure 4As shown, the battery recycling and disassembling equipment 101 in the first embodiment of the utility model includes a disassembling part 30 for disassembling the positive pole sheet 12 in the pole core 10 of lithium iron phosphate and an infiltration flushing part 20 for infiltrating and flushing the positive pole sheet 12. The disassembling part 30 is used for separating the positive pole sheet 12 in the pole core 10 of lithium iron phosphate battery from other components in the pole core 10, that is, the positive pole sheet 12 in the pole core 10 can be obtained through the disassembling part 30, so that the positive pole sheet 12 is completely peeled off from the negative pole sheet 14, the first diaphragm 11 and the second diaphragm 13 of the pole core 10. And the infiltration flushing part 20 is used for dissolving the carbon base coating layer 122 in the positive pole sheet 12, so that the positive pole current collector 121 and the positive pole active material layer 123 in the positive pole sheet 12 are completely separated, and then the positive pole current collector 121 with the positive pole active material layer 123 peeled off can be obtained from the infiltration flushing part 20, and the peeled positive pole active material layer 123 is filtered out in the infiltration flushing part 20, obtaining the recycled positive pole material. The content of aluminum element in the recycled material is extremely low, and the purity of the positive pole active material is high.

[0070] Further, as shown in Figure 4 and Figure 5 The disassembling part 30 provided by the utility model comprises a first rack 31 located above the infiltration flushing part 20, a recycling roller group 32 arranged on the first rack 31 and a first driving assembly 33 arranged on the first rack 31 and driving the recycling roller group 32 to rotate. The first rack 31 in the disassembling part 30 is located above the infiltration flushing part 20, so that the peeled positive pole sheet 12 can fall into the infiltration flushing part 20 under the action of gravity and be completely infiltrated in the infiltration flushing part 20. The first rack 31 is mainly used for fixing the recycling roller group 32 and the first driving assembly 33. The first driving assembly 33 is used for driving each roller shaft in the recycling roller group 32 to rotate, which separates each component in the pole core 10 on one hand and recycles the negative pole sheet 14, the first diaphragm 11 and the second diaphragm 13 in the pole core 10 into a roll on the other hand.

[0071] Specifically, as shown in Figure 5As shown, the recovery roller set 32 in the disassembling part 30 includes a first diaphragm recovery roller 321 and a second diaphragm recovery roller 322 fixed on the first rack 31 and arranged opposite in the vertical direction, and a positive electrode stripping roller 323 and a negative electrode recovery roller 324 fixed on the first rack 31 and arranged opposite in the horizontal direction. In the recovery roller set 32, the number and relative position of the roller shafts are arranged according to the structure of the pole core 10. In this embodiment, the recovery roller set 32 is used to recover the pole core 10 of a lithium iron phosphate battery, so the first diaphragm recovery roller 321 and the second diaphragm recovery roller 322 are arranged to wind the diaphragm in the pole core 10 from both ends, respectively. The first diaphragm recovery roller 321 near the positive electrode stripping roller 323 winds the first diaphragm 11 at the same time, and the second diaphragm recovery roller 322 near the negative electrode recovery roller 324 winds the second diaphragm 13. When the two ends of the diaphragm are wound and recovered at the same time, the positive electrode sheet 12 clamped between the first diaphragm 11 and the second diaphragm 13 is stripped from both of them, forming a separate sheet structure. The recovery roller set 32 not only can strip the positive electrode sheet 12 separately, but also can simultaneously wind and recover the first diaphragm 11, the second diaphragm 13 and the negative electrode sheet 14 independently of each other. The battery recovery and disassembly device 101 provided by the utility model is only used for recovering the positive electrode sheet 12 separated. Therefore, the infiltration flushing part 20 in the battery recovery and disassembly device 101 is located below the positive electrode stripping roller 323, used for receiving the positive electrode sheet 12 stripped by the disassembling part 30.

[0072] During the disassembly of the pole core 10, the battery recovery and disassembly device 101 needs to first wind the first diaphragm 11 at the bottom of the positive electrode sheet 12 in the pole core 10 onto the first diaphragm recovery roller 321, and wind the second diaphragm 13 at the top of the positive electrode sheet 12 in the pole core 10 onto the second diaphragm recovery roller 322, and wind the negative electrode sheet 14 at the top of the second diaphragm 13 in the pole core 10 onto the negative electrode recovery roller 324, so that the positive electrode sheet 12 can move forward, and the positive electrode sheet 12 can extend from the top of the first diaphragm recovery roller 321 to the outside of the first rack 31, and fall on the positive electrode stripping roller 323 under the action of gravity. Then, the positive electrode sheet 12 is driven by the positive electrode stripping roller 323 into the infiltration flushing part 20, and the positive electrode active material layer 123 and the positive electrode current collector 121 of the positive electrode sheet 12 are stripped in the infiltration flushing part 20. The positive electrode sheet 12 is gradually separated from the positive electrode current collector 121 in the infiltration flushing part 20 under the driving of the positive electrode stripping roller 323.

[0073] The battery recycling and disassembling equipment 101 provided by the utility model, firstly, the disassembling part 30 completely peels the positive pole piece 12 from the pole core 10, winds the first diaphragm 11 into a roll through the first diaphragm recycling roller 321, and separates the first diaphragm 11 from the positive pole piece 12; winds the second diaphragm 13 into a roll through the second diaphragm recycling roller 322, thereby separating not only the second diaphragm 13 from the positive pole piece 12 but also the second diaphragm 13 from the negative pole piece 14; and finally winds the negative pole piece 14 into a roll through the negative pole recycling roller 324. In the process of rotating and winding of the recycling roller group 32 of the disassembling part 30, the layers in the pole core 10 are separated, and the positive pole piece 12 is peeled to form a separate sheet structure. Then, the infiltration flushing part 20 is used to separate the positive pole current collector 121 and the positive pole active material layer 123 of the positive pole piece 12, so that the separate positive pole current collector 121 and the positive pole active material are obtained in the infiltration flushing part 20. In the infiltration flushing part 20, the positive pole piece 12 is soaked in warm water, the carbon base coating 122 in the positive pole piece 12 is dissolved, so that the positive pole active material layer 123 falls off from the positive pole current collector 121, and then the complete positive pole current collector 121 is obtained.

[0074] In the disassembling part 30 provided by the utility model, the arrangement structure of the recycling roller group 32 can be adaptively adjusted according to the different layers in the pole core 10. Figure 3 As shown in the figure, the first diaphragm recycling roller 321 and the second diaphragm recycling roller 322 are located between the positive pole peeling roller 323 and the negative pole recycling roller 324 in the horizontal direction; the first diaphragm recycling roller 321 is located below the second diaphragm recycling roller 322, the negative pole recycling roller 324 is located between the first diaphragm recycling roller 321 and the second diaphragm recycling roller 322 in the vertical direction, and the positive pole peeling roller 323 is located below the first diaphragm recycling roller 321 in the vertical direction. The positive pole piece 12 extends from above the first diaphragm recycling roller 321, so that the first diaphragm recycling roller 321 winds and recycles the first diaphragm 11 from below the positive pole piece 12; the second diaphragm recycling roller 322 is located above the first diaphragm recycling roller 321, so that the second diaphragm recycling roller 322 winds and recycles the second diaphragm 12 from above the positive pole piece 12.

[0075] Further, in the disassembling part 30 provided by the utility model, the rotation rate of the positive pole peeling roller 323 is greater than the rotation rate of the first diaphragm recycling roller 321, or the rotation rate of the positive pole peeling roller 323 is greater than the rotation rate of the second diaphragm recycling roller 322, so that the positive pole peeling roller 323 can better separate the positive pole piece 12 from the first diaphragm 11 and guide it into the infiltration flushing part 20.

[0076] In the embodiment, the rotation rates of the first diaphragm recovery roller 321 and the second diaphragm recovery roller 322 are the same, i.e., the winding rates of the first diaphragm 11 and the second diaphragm 13 during recovery are the same. Therefore, the rotation rate of the positive electrode stripping roller 323 is greater than the rotation rate of the first diaphragm recovery roller 321, and the rotation rate of the positive electrode stripping roller 323 is greater than the rotation rate of the second diaphragm recovery roller 322.

[0077] Further, the rotation rate of the negative electrode recovery roller 324 is equal to the rotation rate of the first diaphragm recovery roller 321, or the rotation rate of the negative electrode recovery roller 324 is equal to the rotation rate of the second diaphragm recovery roller 322, so that the negative electrode recovery roller 324 can use the same driving device as the first diaphragm recovery roller 321 or the second diaphragm recovery roller 322 to achieve synchronization. In the embodiment, the rotation rate of the negative electrode recovery roller 324 is equal to the rotation rate of the first diaphragm recovery roller 321, and the rotation rate of the negative electrode recovery roller 324 is equal to the rotation rate of the second diaphragm recovery roller 322, so that the rotation rates of the first diaphragm recovery roller 321, the second diaphragm recovery roller 322, and the negative electrode recovery roller 324 are the same, and the three are driven by the same driving device, and the winding rates of the three during recovery are the same.

[0078] Specifically, as shown in Figure 4 and Figure 5 The first driving assembly 33 includes a first driving member 331 for driving the positive electrode stripping roller 323 to rotate, a second driving member 332 for driving the negative electrode recovery roller 324 to rotate, and a transmission member 333 for transmissionally connecting the second driving member 332 with the first diaphragm recovery roller 321 and the second diaphragm recovery roller 322. The first driving member 331 and the second driving member 332 are used to drive the roller shafts to rotate. In the embodiment, the first driving member 331 and the second driving member 332 are both motors, the first driving member 331 drives the positive electrode stripping roller 323 to rotate to achieve the transmission of the positive electrode sheet 12. The second driving member 332 drives the negative electrode recovery roller 324 to rotate to achieve the winding of the negative electrode sheet 14. The first diaphragm recovery roller 321 and the second diaphragm recovery roller 322 are synchronously rotated with the negative electrode recovery roller 324, so that linkage between the three is achieved through the transmission member 333. The transmission member 333 is at least one of a transmission chain, a transmission belt, a worm gear, and a transmission gear. In the embodiment, the transmission member 333 is a transmission chain arranged between the three, and through the transmission chain, the three roller shafts are rotated at the same speed.

[0079] As shown in Figure 6As shown, the first rack 31 of the disassembling part 30 in the battery recycling and disassembling equipment 101 provided by the utility model is a three-dimensional structure schematic diagram. The first rack 31 comprises a horizontal support plate 311, a pair of vertical support plates 312 fixed on the horizontal support plate 311 and a first mounting plate 313 and a second mounting plate 314 respectively extended by the vertical support plates 312 to both sides. Among them, the positive stripping roller 323 is fixed on the first mounting plate 313, the negative recovery roller 324 is fixed on the second mounting plate 314, the first diaphragm recovery roller 321 and the second diaphragm recovery roller 322 are fixed between the pair of vertical support plates 312 and are arranged in the horizontal direction. The first rack 31 plays a role in fixing the recovery roller group 32 and the first driving assembly 33. At the same time, the first rack 31 fixes the entire disassembling part 30 above the infiltration flushing part 20, so that the positive plate piece 12 enters the infiltration flushing part 20.

[0080] Specifically, the first rack 31 further comprises a pair of limiting plates 315 fixed on the side surfaces of the vertical support plates 312, and the limiting plates 315 are located below the second mounting plate 314. A storage space for accommodating the core 10 of the lithium iron phosphate battery is formed between the pair of limiting plates 315 and the horizontal support plate 311. The space formed between the limiting plate 315 and the horizontal support plate 311 is used to place the core 10. During the winding process of the recovery roller group 32, the core 10 will roll in the storage space along with the rotation of the recovery roller group 32 until it is completely disassembled. In order to avoid the core 10 from deviating, a pair of limiting plates 315 are arranged on both sides of the core 10. The core 10 can be placed horizontally offset, which affects the output of the positive plate piece 12 and also affects the recovery winding of the first diaphragm 11, the second diaphragm 13 and the negative plate piece 14. At the same time, the first rack 31 further comprises a buffer pad (not shown in the figure) arranged on the horizontal support plate 311 and the pair of limiting plates 315. The buffer pad is arranged on one side of the pair of limiting plates 315 facing the storage space and one side of the horizontal support plate 311 facing the storage space. The buffer pad plays a role in buffering and protection during the rolling process of the core 10 due to disassembly, avoids unnecessary damage to the core 10 caused by the collision of disassembly and rolling with the first rack 31, and tries to maintain the integrity of the positive plate piece 12.

[0081] Further, the infiltration flushing part 20 in the battery recycling and disassembling equipment 101 provided by the utility model comprises a soaking pool 21 for soaking the positive plate piece 12 and at least one spraying frame 22 arranged on the soaking pool 21 for infiltrating and flushing the positive plate piece 12.

[0082] The soaking pool 21 of the infiltrating flushing part 20 comprises a pool body and a first control assembly (not shown in the figure) arranged in the pool body to control the temperature of water in the pool body. The pool body is used to contain the recycled liquid, and the first control assembly is used to control the temperature of the contained recycled liquid. The first control assembly comprises but is not limited to a heater and a temperature detector. The first control assembly functions to keep the recycled liquid in the pool body at a constant temperature, so that the carbon-based coating 122 in the positive electrode sheet 12 can be effectively dissolved within a preset time.

[0083] Specifically, the soaking pool 21 of the infiltrating flushing part 20 further comprises a recycled blue arranged in the pool body and a fourth driving assembly (not shown in the figure) arranged in the pool body to drive the recycled blue to ascend and descend relative to the pool body. The recycled blue is hollow. In the initial state, the recycled blue is located inside the pool body and is completely soaked in the recycled liquid in the pool body. When the positive current collector 121 and the positive active material layer 123 of the positive electrode sheet 12 are completely separated, the positive current collector 121 is taken out from the pool body, and the positive active material layer 123 is located in the recycled blue. The fourth driving assembly is used to raise the recycled blue from the initial position, so that the recycled blue is raised above the recycled liquid in the pool body. At this time, the recycled liquid in the recycled blue is discharged through the holes in the recycled blue and returns to the inside of the pool body. The recycled blue collects all the peeled positive active material layer 123. After the positive active material layer 123 is completely taken out, drying treatment is performed to obtain high-purity active material. Then, the fourth driving assembly lowers the recycled blue back to the inside of the pool body for the next recycling of the positive electrode sheet 12.

[0084] The spraying frame 22 of the infiltrating flushing part 20 comprises at least one support frame and a plurality of spraying heads 23 arranged on the support frame. Figure 2 As shown in the figure, in this embodiment, the positive electrode sheet 12 is provided with the positive active material layer 123 only on one side of the positive current collector 121. Therefore, the spraying frame 22 of the infiltrating flushing part 20 is provided with only one support frame 22, which spans both sides of the width direction of the soaking pool 21. The spraying frame 22 is provided with six spraying heads 23, and all the spraying heads 23 are arranged towards the side of the positive electrode sheet 12 with the positive active material layer 123. Figure 4 As shown in the figure, before the positive electrode sheet 12 enters the soaking pool 21, the side of the positive electrode sheet 12 with the positive active material layer 123 can be completely infiltrated.

[0085] Specifically, the support frame of the infiltration flushing part 20 is provided with a second control assembly for controlling the water pressure of the spray head 23 and a third control assembly for regulating the water temperature of the spray head 23 (not shown in the figure). The second control assembly can adjust the water pressure of the spray head 23, and the water pressure determines the infiltration effect of the positive plate 12. The third control assembly can adjust the water temperature of the spray head 23, and the water temperature can be the same as or different from the temperature in the soaking pool 21. When the water temperature of the spray head 23 needs to be different from the water temperature in the soaking pool 21, the water temperature of the spray head 23 can be adjusted by the third control assembly.

[0086] Next, the battery recycling and disassembling method provided by the utility model is explained in combination with the battery recycling and disassembling equipment 101 provided by the utility model.

[0087] Firstly, the existing battery recycling method is adopted to discharge the lithium iron phosphate battery and recycle the electrolyte, so as to obtain a lithium iron phosphate battery without electrolyte. Then, the battery recycling and disassembling method provided by the utility model is adopted to remove the shell of the lithium iron phosphate battery, so as to obtain the pole core 10 of the lithium iron phosphate.

[0088] Then, the two ends of the diaphragm, i.e. the end portions of the first diaphragm 11 and the second diaphragm 13, and the end portions of the positive plate 12 and the negative plate 14, need to be found on the wound and formed pole core 10, and then the end portions of each part are fixed to the recycling roller group 32 of the battery recycling and disassembling equipment 101, and the peeling of each part on the pole core 10 is realized by starting the first driving assembly 33, and finally the positive plate 12 is obtained. In the actual operation process, the end portion of the first diaphragm 11 of the pole core 10 is attached to the first diaphragm recycling roller 321, the end portion of the negative plate 14 of the pole core 10 is attached to the negative recycling roller 324, the second diaphragm 13 of the pole core 10 is attached to the second diaphragm recycling roller 322, and the end portion of the positive plate 12 of the pole core 10 is placed on the positive peeling roller 323, and the first driving assembly 33 is started to obtain the positive plate 12 peeled from the pole core 10 of the lithium iron phosphate battery. The end portion of the positive plate 12 is placed on the positive peeling roller 323, and then the first driving assembly 33 is started to drive the rotation of the positive peeling roller 323 to drive the peeled positive plate 12 to move outward, and to enter the infiltration flushing part 20 under the action of gravity.

[0089] Next, the spray frame 22 of the immersion and rinsing section 20 sprays water onto the side of the positive electrode plate 12 with the positive active material layer 123, thereby immersing the carbon substrate coating 122. The spray head 23 of the immersion and rinsing section 20 sprays warm water onto the positive electrode plate 12 that falls into the immersion and rinsing section 20, causing the carbon substrate coating 122 to be dissolved and loosened between the positive active material layer 123 and the positive current collector 121. During this process, the water pressure and water temperature during spraying can be adjusted by controlling the second and third control components on the spray frame 22, respectively.

[0090] Finally, the end of the positive electrode 12 falls into the immersion and rinsing section 20 under gravity and is immersed in the warm water of the immersion tank 21. To prevent excessive number of positive electrode 12s from adhering to each other during immersion in the immersion and rinsing section 20, the positive electrode 12s are guided and stacked within the section after entering, ensuring that as many positive electrode 12s as possible are immersed in the warm water. The carbon substrate coating 122 of the positive electrode 12 dissolves in the warm water, losing its bonding ability, causing the positive active material layer 123 to gradually separate from the positive current collector 121 and detach from it.

[0091] Example 2:

[0092] like Figures 7-10 As shown, this is a battery recycling and dismantling method and battery recycling and dismantling equipment 100 provided in the second embodiment of this utility model.

[0093] The following is combined with, for example Figure 7 This invention describes a battery recycling and dismantling method according to a second embodiment. The battery recycling and dismantling method provided by this invention includes the following steps.

[0094] The battery recycling and dismantling method provided in the second embodiment of this utility model differs from that in the first embodiment in that it further includes the following steps: S4: immersing and rinsing the positive electrode sheet 12; and S5: recycling and winding the positive electrode current collector 121.

[0095] In the second embodiment provided by this utility model, step S4, immersion rinsing of the positive electrode sheet 12, further includes rinsing the side of the positive electrode sheet 12 with the positive active material layer 123 after immersion. The purpose of step S4 is to physically rinse the residual positive active material layer 123 on the positive current collector 121 after the positive electrode sheet 12 has been immersed, thereby peeling off the residual positive active material layer 123 and the carbon substrate coating 122 from the positive current collector 121, thus obtaining a purer positive current collector 121.

[0096] In the second embodiment of the utility model, the pressure of the flushing is 0.15MPa-0.35MPa when the battery recycling and disassembling method is used to flush the positive current collector 121; the pressure of the flushing can be controlled to be 0.15MPa, 0.2MPa, 0.25MPa, 0.3MPa, 0.35MPa or any value between any two of the above values. At this time, the purpose of the flushing is to completely dissolve the carbon base coating 122 remaining on the positive current collector 121, so as to separate the positive active material layer 123 from the positive current collector 121. In order to ensure the flushing effect, a certain pressure needs to be applied to the positive current collector 121. Preferably, the flushing pressure is 0.2MPa-0.35MPa. If the water pressure is lower than 0.2MPa, the water flow is too weak to achieve the flushing effect. If the water pressure is higher than 0.35MPa, the water flow is too fast and the positive current collector 121 is easily damaged during flushing, which is not conducive to recycling. Further, preferably, the pressure of the flushing is 0.3MPa.

[0097] In the first embodiment of the utility model, the temperature of the flushing is 30℃-90℃ when the battery recycling and disassembling method is used to flush the positive current collector 121. The temperature of the flushing is 30℃, 35℃, 38℃, 40℃, 45℃, 50℃, 55℃, 60℃, 70℃, 80℃, 90℃ or any value between any two of the above values. At this time, the purpose of the flushing is to flush the carbon base coating 122 and the positive active material layer 123 remaining on the positive current collector 121 together before the positive current collector 121 is recycled and wound, and then the water flow falls back into the soaking pool 21. Therefore, the water temperature of the flushing can be lower than the water temperature during the soaking or the soaking. Preferably, the temperature of the flushing is 30℃-50℃. If the temperature is too high, there is a potential safety hazard in the working environment of the battery recycling and disassembling, the water of the flushing is more likely to splash outside the equipment than the spraying, which causes unnecessary safety problems, and the high temperature of the flushing also consumes a lot of energy, which is not conducive to the economic benefit of the recycling and disassembling. Preferably, the temperature of the flushing is 35℃.

[0098] In the second embodiment of the utility model, S5 is further included, that is, the positive current collector 121 is wound for recycling. Figure 8As shown, in the S5 step, the positive electrode current collector 121 peeled off from the soaked positive electrode sheet 12 needs to be recovered and wound by using the battery recycling and disassembling equipment 100 provided by the utility model. In the S5 step, the positive electrode current collector 121 separated from the positive active material layer 123 after soaking is fished out from the soaking pool 21 and recovered and wound, and the above-mentioned S4 step is completed in the process of recovery and winding. The S5 step of recovering and winding the positive electrode current collector 121 in the battery recycling and disassembling method provided by the utility model can be completely applicable to the battery recycling and disassembling equipment 100 provided by the utility model, and the recovery of the positive electrode current collector 121 is completed by the battery recycling and disassembling equipment 100.

[0099] The second embodiment of the utility model will be described below in combination with the Figures 8-10 The battery recycling and disassembling equipment 100 provided by the second embodiment of the utility model is different from the first embodiment in that the battery recycling and disassembling equipment 100 further comprises a current collector recovery assembly 40, and the infiltration flushing part 20 has two spraying frames 22 located at two opposite ends of the soaking pool 21.

[0100] As shown in the Figure 8 The current collector recovery assembly 40 is arranged at the opposite side of the disassembling assembly 30 and is used for recovering the positive electrode current collector 121 that has been peeled off in the infiltration flushing part 20.

[0101] Specifically, as shown in the Figure 8 and Figure 9 The current collector recovery assembly 40 comprises a second rack 41 located above the infiltration flushing part 20, a positive electrode current collector recovery roller 42 arranged on the second rack 41, and a third driving member 43 for driving the positive electrode current collector recovery roller 42 to rotate, and the positive electrode current collector 121 passing through the infiltration flushing part 20 is wound on the positive electrode current collector recovery roller 42. The second rack 41 and the first rack 31 in the current collector recovery assembly 40 are respectively located at opposite sides in the length direction of the soaking pool 21 of the infiltration flushing part 20, so that the positive electrode sheet 12 entering the soaking pool 21 can be separated in the soaking pool 21, the end of the positive electrode current collector 121 in the soaking pool 21 is pulled out and attached to the positive electrode current collector recovery roller 42, and is wound on the positive electrode current collector recovery roller 42 driven by the third driving member 43, thereby completing the separate recovery of the positive electrode current collector 121.

[0102] Further, as shown in the Figure 10As shown, the battery recycling and disassembling equipment 100 provided by the second embodiment of the utility model has two spray frames (22, 24) in the infiltration flushing part 20, the two spray frames (22, 24) are located at the two opposite ends of the length direction of the soaking pool 21, one of which is the first spray frame 22 close to the first rack 31 for spraying the just stripped positive pole piece 12, and the other is the second spray frame 24 close to the second rack 41 for flushing the just soaked and separated positive pole current collector 121.

[0103] Then, the battery recycling and disassembling method provided by the second embodiment of the utility model is explained in combination with the battery recycling and disassembling equipment 100 provided by the second embodiment of the utility model.

[0104] In the S5 step, the end of the positive pole current collector 121 of the positive pole piece 12 is pulled out of the infiltration flushing part 20 and attached to the positive pole current collector recycling roller 42, and the first driving assembly 33 and the third driving part 43 are started. On the one hand, the opening of the first driving assembly 33 enables the disassembling part 30 to continuously provide the stripped positive pole piece 12 to the infiltration flushing part 20, and on the other hand, the third driving part 43 is started, so that the stripped positive pole current collector 121 in the infiltration flushing part 20 is continuously wound and gathered, and under the simultaneous action of the two ends, the positive pole piece 12 in the infiltration flushing part 20 will not be adhered to each other, and the problem that the positive active material layer 123 cannot be stripped due to adhesion can be avoided.

[0105] In the S4 step, the second spray frame 24 provided by the infiltration flushing part 20 sprays warm water on the positive pole current collector 121 extending out of the soaking pool 21, and the spray head 23 of the second spray frame 24 is arranged towards the side surface of the side of the positive pole current collector 121 with the positive active material layer 123. By flushing the positive pole current collector 121 extending out of the infiltration flushing part 20 through the second spray frame 24, the positive active material layer 123 remaining on the positive pole current collector 121 can be better stripped, the remaining positive active material layer 123 is flushed back into the soaking pool 21 by the warm water, and is collected in the recycling blue of the soaking pool 21, so that the positive pole current collector 121 with higher quality is obtained on the positive pole current collector recycling roller 42.

[0106] By the battery recycling and disassembling method provided by the second embodiment of the utility model, the composition of the positive active material obtained from the recycling blue of the infiltration flushing part 20 is analyzed, as shown in the following table 1:

[0107]

[0108] Table 1

[0109] It can be seen that the content of aluminum element (Al) in the positive active material obtained by the battery recycling and disassembling method is very low. In the active material sample 1 and the active material sample 2, the positive active material layer 123 of the positive electrode sheet 12 does not contain aluminum element (Al) itself, so the content of aluminum element (Al) in the sample after recycling is only 4.06ppm and 7.49ppm; in the active material sample 3 and the active material sample 4, the active material layer 123 of the positive electrode sheet 12 contains Al, and the content of aluminum element (Al) in the positive active material layer 123 is 120ppm, and the content of aluminum element (Al) in the active material sample after recycling is only 131.56ppm and 128.21ppm, and the increment of the content of aluminum element (Al) after recycling is also very low, that is, the damage to the positive current collector 121 during the recycling of the positive electrode sheet 12 is very low, and the integrity of the positive current collector 121 can be maintained, at the same time, the purity of the recycled active material is high, which indicates that the recycling efficiency of the positive electrode sheet 12 of the pole core 10 of the lithium iron phosphate battery is high.

[0110] Example three:

[0111] In the pole core 10 of the lithium iron phosphate battery, if the positive current collector 121 of the positive electrode sheet 12 is provided with positive active material layers 123 on both sides, the spraying frame 22 of the infiltration flushing part 20 in the battery recycling and disassembling equipment 100 provided by the utility model is provided with two support frames (not shown in the figure), and the two support frames are located at one end of the length direction of the soaking pool 21, that is, the two support frames are located below the disassembling part 30, and / or the two support frames are located below the current collector recycling assembly 40. Among them, the spray heads 23 on the two support frames are oppositely arranged, and in the recycling process, the positive electrode sheet 12 disassembled by the disassembling part 30 passes between the two support frames and then enters the soaking pool. The spray heads 23 on the two support frames spray on both sides of the positive current collector 121, so that the positive active material layers 123 on both sides of the positive electrode sheet 12 are infiltrated before entering the soaking pool 21 of the infiltration flushing part 20. And / or, the positive current collector 121 protruding from the soaking pool 21 passes between the two support frames, and the spray heads 23 on the two support frames flush on both sides of the positive current collector 121, so that the positive active material remaining on the positive current collector 121 recycled in the current collector recycling assembly 40 is less.

[0112] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery recycling and dismantling device, characterized in that, It includes a disassembly section for disassembling the positive electrode sheet in the lithium iron phosphate core and an immersion and rinsing section for immersion and rinsing the positive electrode sheet. The immersion and rinsing section includes an immersion tank for immersing the positive electrode sheet and at least one spray rack disposed on the immersion tank to immerse and rinse the positive electrode sheet. The disassembly unit includes a first frame, a recovery roller assembly disposed on the first frame, and a first drive assembly disposed on the first frame to drive the recovery roller assembly.

2. The battery recycling and dismantling equipment as described in claim 1, characterized in that, The recovery roller assembly includes a first diaphragm recovery roller and a second diaphragm recovery roller fixed to the first frame and arranged opposite each other in the vertical direction; and a positive electrode stripping roller and a negative electrode recovery roller fixed to the first frame and arranged opposite each other in the horizontal direction, wherein the immersion and flushing section is located below the positive electrode stripping roller.

3. The battery recycling and dismantling equipment as described in claim 2, characterized in that, The first diaphragm of the electrode core is wound onto the first diaphragm recovery roller, the second diaphragm of the electrode core is wound onto the second diaphragm recovery roller, and the negative electrode sheet of the electrode core is wound onto the negative electrode recovery roller; the positive electrode sheet is driven into the immersion and rinsing section by the positive electrode stripping roller.

4. The battery recycling and dismantling equipment as described in claim 2, characterized in that, The rotational speed of the positive electrode stripping roller is greater than the rotational speed of the first diaphragm recovery roller and / or the second diaphragm recovery roller.

5. The battery recycling and dismantling equipment as described in claim 2, characterized in that, The first diaphragm recovery roller and the second diaphragm recovery roller rotate at the same speed.

6. The battery recycling and dismantling equipment as described in claim 2, characterized in that, The rotational speed of the negative electrode recovery roller is equal to the rotational speed of the first diaphragm recovery roller and / or the second diaphragm recovery roller.

7. The battery recycling and dismantling equipment as described in claim 2, characterized in that, The first driving assembly includes a first driving member that drives the positive electrode stripping roller to rotate, a second driving member that drives the negative electrode recovery roller to rotate, and a transmission member that drives the second driving member to the first diaphragm recovery roller and the second diaphragm recovery roller.

8. The battery recycling and dismantling equipment as described in claim 1, characterized in that, The battery recycling and dismantling equipment also includes a current collector recycling assembly; the current collector recycling assembly includes a second frame located above the immersion and flushing section, a positive current collector recycling roller disposed on the second frame, and a third drive component that drives the positive current collector recycling roller to rotate.

9. The battery recycling and dismantling equipment as described in claim 8, characterized in that, The soaking tank of the immersion and rinsing section includes a tank body and a first control component disposed in the tank body to regulate the water temperature in the tank body.

10. The battery recycling and dismantling equipment as described in claim 9, characterized in that, The soaking tank of the immersion and rinsing section also includes a recovery basket disposed in the tank body and a fourth drive assembly disposed in the tank body to drive the recovery basket to move up and down relative to the tank body.

11. The battery recycling and dismantling equipment as described in claim 1, characterized in that, The immersion and rinsing section is equipped with two spray racks, which are located at the two ends of the immersion tank, respectively.

12. The battery recycling and dismantling equipment as described in claim 1, characterized in that, The spray frame of the immersion and rinsing section includes at least one support frame, and each support frame is provided with a plurality of spray heads.

13. The battery recycling and dismantling equipment as described in claim 12, characterized in that, The support frame is equipped with a second control component for controlling the water pressure of the spray head and a third control component for regulating the water temperature of the spray head.

14. The battery recycling and dismantling equipment as described in claim 12, characterized in that, The spray frame of the immersion and rinsing section includes two support frames, with the spray heads of the two support frames arranged opposite each other, and the positive electrode plate passing between the two support frames.

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