A harmless resource recycling treatment method for lithium batteries

Abstract

The application discloses a harmless resource recycling method for lithium batteries, and relates to the field of lithium battery recycling, which comprises the following steps: completely discharging the recycled lithium batteries by immersing the lithium batteries in a discharging device containing a conductive salt solution; sending the discharged lithium batteries into a sealed heating device for drying operation; and performing multi-stage crushing and screening on the dried lithium batteries under the protection of inert gas, and then performing fine sorting, so that the copper and aluminum current collector metals are completely separated from the electrode materials. Through the cooperation of the first hole frame, the second hole frame, the assembly frame, the sliding frame and the guide auxiliary wheel, the first hole frame and the second hole frame are switched inside the discharging tank, the first hole frame and the second hole frame can store the discharged lithium batteries, so that the discharged lithium batteries can be uniformly taken out, and the labor intensity of the workers can be reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium battery recycling and processing, and in particular to a method for harmless resource recycling and processing of lithium batteries. Background Technology

[0002] A lithium battery is a rechargeable battery that uses lithium ions or lithium metal as the key electrochemical components. After use, lithium batteries undergo harmless resource recycling, which involves the use of harmless resource recycling methods for lithium batteries.

[0003] Existing methods for the harmless recycling and disposal of lithium batteries typically involve thoroughly discharging the lithium batteries. This usually involves placing multiple lithium batteries into a discharge tank filled with a conductive medium, allowing the lithium batteries to be immersed and discharged. This process completely releases the residual charge in the waste batteries, eliminates the risk of short circuits and electric shock, and ensures the safety of the subsequent crushing process.

[0004] However, after the lithium batteries have been soaked and discharged, workers usually need to use tools to retrieve them one by one. This method is often cumbersome, increasing the labor intensity of workers and making it difficult to control the liquid. Therefore, it is necessary to use a harmless resource recycling method for lithium batteries that can be easily removed after the lithium batteries have finished discharging and allows for liquid control. Summary of the Invention

[0005] The purpose of this invention is to provide a method for the harmless recycling and treatment of lithium batteries, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for harmless resource recycling and treatment of lithium batteries, comprising the following specific steps:

[0007] Step 1: Thoroughly discharge the recycled lithium batteries by immersing them in a discharge device containing a conductive salt solution.

[0008] Step 2: Send the discharged lithium battery into a sealed heating device for drying.

[0009] Step 3: The dried lithium battery is subjected to multi-stage crushing and screening under inert gas protection, and then fine sorting is carried out to completely separate the copper and aluminum current collector metals from the electrode materials, so as to obtain a high-purity copper-aluminum mixture and black powder rich in lithium, cobalt and nickel. The black powder is added to the reaction vessel and mixed with acid and reducing agent to react, so that lithium, cobalt, nickel and manganese dissolve into the solution.

[0010] Specifically, the discharge device in step one includes:

[0011] A discharge tank, wherein a first hole frame and a second hole frame are provided above the discharge tank;

[0012] A support mechanism is located outside the discharge tank and is used to support the discharge tank.

[0013] An auxiliary mechanism is located on the support mechanism and is used to support and slide the first hole frame and the second hole frame.

[0014] Preferred options also include:

[0015] Step 4: Impurity removal and separation. Impurities are precipitated by adjusting the pH value or adding a precipitant, and then removed by solid-liquid separation equipment.

[0016] Step 5: Extraction and back-extraction. Through multi-stage extraction and back-extraction processes, enriched solutions of single metals are obtained respectively.

[0017] Step Six: Prepare lithium carbonate, cobalt sulfate and ternary precursor products through evaporation concentration, crystallization or precipitation reaction. Then, the waste gas is treated by combustion, adsorption and spraying, the wastewater is treated by neutralization, precipitation and membrane treatment for reuse, and the waste residue is landfilled or retreated.

[0018] Preferably, the discharge device further includes:

[0019] A collection mechanism, located on an auxiliary mechanism, is used to collect liquid dripping from the first and second orifice frames.

[0020] A positioning mechanism, which is located on an auxiliary mechanism.

[0021] Preferably, the support mechanism includes:

[0022] A support frame, located outside the discharge tank;

[0023] An auxiliary plate is fixedly connected to the side of the discharge tank. The inner wall of the support frame is provided with a first sliding groove, and the auxiliary plate is slidably inserted into the inner cavity of the first sliding groove.

[0024] A support frame, which is fixedly connected to the bottom end of the inner wall of the support frame;

[0025] A hydraulic cylinder, which is fixedly inserted into the middle of the support frame, and the end of the hydraulic cylinder extends to the bottom of the support frame;

[0026] Telescopic rod, which is fixedly connected between the bottom end of the discharge tank and the inner wall of the support frame;

[0027] A base support frame, which is fixedly connected to the bottom of the support frame;

[0028] A docking seat, which is fixedly connected to the side of the support frame.

[0029] Preferably, the auxiliary mechanism includes:

[0030] An assembly frame, wherein adjacent assembly frames are respectively fixedly connected to the top of the first hole frame and the second hole frame;

[0031] A sliding frame, which is fixedly connected to the bottom of the assembly frame;

[0032] A sliding column is fixedly connected to the side of the inner wall of the sliding frame.

[0033] Preferably, the auxiliary mechanism further includes:

[0034] A support seat, which is fixedly connected to the side of the support frame, and the sliding column is slidably inserted into the inner cavity of the support seat;

[0035] The guide wheel has grooves at the top and bottom of the sliding column, and the guide wheel is rotatably connected to the inside of the grooves. The inner wall of the support seat has guide grooves that cooperate with the guide wheel.

[0036] Preferably, the collection mechanism includes:

[0037] A collection frame, wherein the collection frame is located between adjacent supports;

[0038] An assembly plate, which is fixedly connected to the side of the collection frame;

[0039] The mounting bracket is fixedly connected to the side of the support, and the assembly plate is slidably inserted into the inner cavity of the mounting bracket.

[0040] Preferably, the collection mechanism further includes:

[0041] A positioning post is fixedly connected to the side of the collection frame, and a first slot is provided on the side of the positioning post;

[0042] An auxiliary frame is fixedly fitted onto the outside of the collection frame.

[0043] Preferably, the positioning mechanism includes:

[0044] A support member, located on a support base, comprising:

[0045] A support body located on the side of the support seat;

[0046] A connecting part, the connecting part being located on the side of the support body, the top of the connecting part being fixed to the support seat;

[0047] A limiting member, located on the support body, comprising:

[0048] A connector located on the side of the support;

[0049] The linkage part is located at the bottom of the connecting body;

[0050] The plug-in part is fixedly plugged into the linkage part. The side of the support body is provided with a second sliding groove. The plug-in part is slidably inserted into the inner cavity of the second sliding groove and the first slot.

[0051] The positioning part is located at the top of the connector;

[0052] The locking part has a third sliding groove on the side of the support body, and the locking part is slidably inserted into the inner cavity of the third sliding groove. The locking part passes through the sliding frame. The side of the support seat has a second slot, and the locking part is slidably inserted into the inner cavity of the second slot.

[0053] Preferably, the positioning mechanism further includes:

[0054] A positioning cylinder, which is fixedly connected to the top of the positioning part;

[0055] The positioning part has a fourth sliding groove at the top that mates with the snap-fit ​​post, and the support body has a third snap-fit ​​groove at the top. The snap-fit ​​post is slidably inserted into the inner cavity of the third snap-fit ​​groove.

[0056] A fixing frame, which is fixedly sleeved on the outside of the snap-fit ​​post;

[0057] The mounting sleeve is threadedly installed inside the positioning sleeve;

[0058] A sliding rod is fixedly connected to the top of the snap-fit ​​post, and the outer wall of the sliding rod is slidably inserted into the middle of the mounting cylinder;

[0059] A spring is sleeved on the outside of the sliding rod, one end of the spring is fixedly connected to the mounting cylinder, and the other end of the spring is fixedly connected to the snap-fit ​​post.

[0060] The technical effects and advantages of this invention are as follows:

[0061] (1) The present invention utilizes a combination of a first hole frame, a second hole frame, an assembly frame, a sliding frame, a sliding column, a support seat, and a guide wheel. The first hole frame and the second hole frame are switched inside the discharge tank. The first hole frame and the second hole frame can store the discharged lithium batteries so that multiple discharged lithium batteries can be taken out at the same time. This facilitates the unified removal of discharged lithium batteries and reduces the labor intensity of the staff. At the same time, the switching of the first hole frame and the second hole frame allows the discharged lithium batteries to be controlled for liquid and the new lithium batteries to be discharged, which reduces the waiting time for lithium battery liquid control and makes the operation convenient.

[0062] (2) The present invention utilizes a combination of a support frame, an auxiliary plate, a support bracket, a hydraulic cylinder, a telescopic rod, and a base support frame. The support frame supports the discharge tank, the hydraulic cylinder drives the discharge tank to move up and down, and the telescopic rod and the auxiliary plate provide vertical guidance and support for the up and down movement of the discharge tank. This facilitates the direct separation of the discharge tank from the first or second hole frame, so that the discharged lithium battery can be directly separated from the discharge tank, thus achieving automated operation.

[0063] (3) The present invention utilizes a combination of a collection frame, an assembly plate, a mounting frame, a positioning column, and an auxiliary frame. The collection frame is located below the first or second hole frame to collect the liquid dripping from the first or second hole frame. The assembly plate and the mounting frame slide to install the collection frame. The auxiliary frame collects the liquid dripping between the collection frame and the discharge tank. This facilitates the liquid control operation of the lithium battery that has completed discharge in the first or second hole frame, and also facilitates the collection of liquid.

[0064] (4) The present invention utilizes a combination of support, limiting member, positioning cylinder, snap-fit ​​post, fixing frame, mounting cylinder, sliding rod and spring. The support allows the limiting member to slide on it. The limiting member limits the relative position of the sliding frame and the support seat and locks the position of the collection frame. The snap-fit ​​post fixes the limiting member to the support seat. This helps to lock the position of the first hole frame and the second hole frame, prevents random sliding, and facilitates the installation and disassembly of the collection frame, making it convenient to remove the collection frame for maintenance. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0066] Figure 2 This is a schematic diagram of the sliding frame structure of the present invention;

[0067] Figure 3 This is a schematic diagram of the assembly plate structure of the present invention;

[0068] Figure 4 This is a front sectional view of the support frame structure of the present invention;

[0069] Figure 5 This is a schematic diagram showing the separation of the discharge cell and the first hole frame in this invention;

[0070] Figure 6 This is a front cross-sectional view of the support structure of the present invention;

[0071] Figure 7 This is a front cross-sectional view of the positioning cylinder of the present invention.

[0072] In the diagram: 1. Discharge tank; 2. First hole frame; 3. Second hole frame; 4. Support mechanism; 41. Support frame; 42. Auxiliary plate; 43. Support bracket; 44. Hydraulic cylinder; 45. Telescopic rod; 46. Base support frame; 5. Auxiliary mechanism; 51. Assembly frame; 52. Sliding frame; 53. Sliding column; 54. Support seat; 55. Guide wheel; 6. Collection mechanism; 61. Collection frame; 62. Assembly plate; 63. Mounting frame; 64. Positioning column; 65. Auxiliary frame; 7. Positioning mechanism; 71. Support component; 711. Support body; 712. Connecting part; 72. Limiting component; 721. Connecting body; 722. Linkage part; 723. Insertion part; 724. Positioning part; 725. Locking part; 73. Positioning cylinder; 74. Snap-fit ​​column; 75. Fixing frame; 76. Mounting cylinder; 77. Sliding rod; 78. Spring. Detailed Implementation

[0073] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0074] This invention provides, for example Figures 1-7 The method for harmless recycling of lithium batteries shown includes the following steps: Step 1: The recycled lithium batteries are thoroughly discharged by placing them in a discharge device containing a conductive salt solution for immersion and discharge.

[0075] Step 2: Place the discharged lithium battery into a sealed heating device for drying.

[0076] Step 3: The dried lithium battery is subjected to multi-stage crushing and screening under inert gas protection, and then fine sorting is carried out to completely separate the copper and aluminum current collector metals from the electrode materials, so as to obtain a high-purity copper-aluminum mixture and black powder rich in lithium, cobalt and nickel. The black powder is added to the reaction vessel and mixed with acid and reducing agent to react, so that lithium, cobalt, nickel and manganese dissolve into the solution.

[0077] Step 4: Impurity removal and separation. Impurities are precipitated by adjusting the pH value or adding a precipitant, and then removed by solid-liquid separation equipment.

[0078] Step 5: Extraction and back-extraction. Through multi-stage extraction and back-extraction processes, enriched solutions of single metals are obtained respectively.

[0079] Step 6: Prepare lithium carbonate, cobalt sulfate and ternary precursor products through evaporation concentration, crystallization or precipitation reaction. Then, the waste gas is treated by combustion, adsorption and spraying, the wastewater is treated by neutralization, precipitation and membrane treatment for reuse, and the waste residue is landfilled or retreated.

[0080] The discharge device in step one specifically includes a discharge tank 1, a support mechanism 4, and an auxiliary mechanism 5. A first perforated frame 2 and a second perforated frame 3 are positioned above the discharge tank 1. The discharge tank 1 has a corrosion-resistant structure and contains a conductive salt solution. The discharge tank 1 can be connected and fixed to an external lithium battery conveyor belt via a docking seat, thus positioning the discharge tank 1 at the end of the external conveyor belt, allowing the lithium batteries to be directly transported into the discharge tank 1 for immersion and discharge. Both the first perforated frame 2 and the second perforated frame 3 are mesh-type frames, and they can be switched. If the first perforated frame 2 is inside the discharge tank 1, the second perforated frame 3 is positioned above the collection frame 61, allowing the immersed lithium batteries inside the second perforated frame 3 to be discharged. During the liquid control operation, the first hole frame 2 holds the new lithium battery, allowing the first hole frame 2 and the second hole frame 3 to be switched between without waiting for liquid control time, thus improving the efficiency of lithium battery recycling. Conversely, if the second hole frame 3 is inside the discharge tank 1, the first hole frame 2 is above the collection frame 61, and the first hole frame 2 and the second hole frame 3 can slide off the support 54 and then be mounted back onto the support 54 from the back of the discharge tank 1, thus enabling repeated switching. The support mechanism 4 is located outside the discharge tank 1 and is used to support the discharge tank 1. The auxiliary mechanism 5 is located on the support mechanism 4 and is used to support and slide the first hole frame 2 and the second hole frame 3.

[0081] Furthermore, the discharge device also includes a collection mechanism 6 and a positioning mechanism 7. The collection mechanism 6 is located on the auxiliary mechanism 5 and is used to collect the liquid dripping from the first hole frame 2 and the second hole frame 3. The positioning mechanism 7 is located on the auxiliary mechanism 5.

[0082] Furthermore, the support mechanism 4 includes a support frame 41, an auxiliary plate 42, a support bracket 43, a hydraulic cylinder 44, a telescopic rod 45, a base bracket 46, and a docking seat. The support frame 41 is U-shaped and facilitates support for the discharge tank 1, allowing it to slide within the tank. The auxiliary plate 42 facilitates connection between the discharge tank 1 and the support frame 41, guiding the vertical movement of the discharge tank 1 and improving its stability. The support bracket 43 is U-shaped and supports the hydraulic cylinder 44. The hydraulic cylinder 44 is electrically connected to an external power source via an external switch and drives the discharge tank 1 to move up and down, connecting or separating it from the first hole frame 2 or the second hole frame 3. This facilitates the direct separation of multiple lithium batteries from the discharge tank 1, reducing the workload of workers. The telescopic rod 45 can be configured in three sections. Furthermore, a certain damping can be set between adjacent sections, which is beneficial for providing auxiliary support to the bottom of the discharge tank 1 and guiding the vertical movement of the discharge tank 1. The base support 46 is set in a Z-shape, which is beneficial for providing bottom support to the support frame 41 and making it easy to place the support frame 41 in a designated position for use. The support frame 41 is located outside the discharge tank 1. The auxiliary plate 42 is fixedly connected to the side of the discharge tank 1. The inner wall of the support frame 41 is provided with a first sliding groove. The auxiliary plate 42 is slidably inserted into the inner cavity of the first sliding groove. The support frame 43 is fixedly connected to the bottom end of the inner wall of the support frame 41. The hydraulic cylinder 44 is fixedly inserted into the middle of the support frame 43, and the end of the hydraulic cylinder 44 extends to the bottom of the support frame 41. The telescopic rod 45 is fixedly connected between the discharge tank 1 and the bottom end of the inner wall of the support frame 41. The base support 46 is fixedly connected to the bottom of the support frame 41. The docking seat is fixedly connected to the side of the support frame 41.

[0083] Specifically, the auxiliary mechanism 5 includes an assembly frame 51, a sliding frame 52, and a sliding column 53. The assembly frame 51 is U-shaped, which is beneficial for supporting the first hole frame 2 or the second hole frame 3, and also facilitates the horizontal sliding of the first hole frame 2 and the second hole frame 3. The sliding frame 52 is L-shaped, which is beneficial for supporting the assembly frame 51 and facilitating the horizontal sliding of the assembly frame 51. The sliding column 53 is beneficial for supporting the sliding frame 52 and facilitating the connection between the sliding frame 52 and the support seat 54 to guide the horizontal sliding of the sliding frame 52. Adjacent assembly frames 51 are fixedly connected to the top of the first hole frame 2 and the second hole frame 3, respectively. The sliding frame 52 is fixedly connected to the bottom of the assembly frame 51. The sliding column 53 is fixedly connected to the side of the inner wall of the sliding frame 52.

[0084] More specifically, the auxiliary mechanism 5 also includes a support 54 and a guide wheel 55. The support 54 facilitates the sliding of the sliding column 53 within it, while the guide wheel 55 provides horizontal guidance for the sliding of the sliding frame 52 and reduces the friction of the sliding column 53, making it easier to slide the sliding frame 52. The support 54 is fixedly connected to the side of the support frame 41, and the sliding column 53 is slidably inserted into the inner cavity of the support 54. Grooves are provided at the top and bottom of the sliding column 53, and the guide wheel 55 is rotatably connected inside the grooves. The inner wall of the support 54 has guide grooves that cooperate with the guide wheel 55.

[0085] Furthermore, the collection mechanism 6 includes a collection frame 61, an assembly plate 62, and a mounting bracket 63. The collection frame 61 is positioned below the first hole frame 2 or the second hole frame 3 to collect the liquid dripping from the discharged lithium battery inside the first hole frame 2 or the second hole frame 3, thereby performing liquid control operations on the discharged lithium battery. Simultaneously, it can continue discharging operations on a new batch of lithium batteries, saving time occupied by the first hole frame 2 or the second hole frame 3 and improving processing efficiency. A discharge pipe can be installed on the collection frame 61 to drain the soaking liquid, and a discharge pipe is also provided on the discharge tank 1. The tube is used for drainage operations. The assembly plate 62 is conducive to supporting the collection frame 61 and facilitating the horizontal guidance of the sliding of the collection frame 61 for sliding installation. The mounting frame 63 is U-shaped, which facilitates the sliding of the assembly plate 62 inside it and facilitates the support of the assembly plate 62 for supporting the collection frame 61. The collection frame 61 is located between adjacent support seats 54. The assembly plate 62 is fixedly connected to the side of the collection frame 61, and the mounting frame 63 is fixedly connected to the side of the support seat 54. The inner cavity of the assembly plate 62 and the mounting frame 63 are slidably interlocked.

[0086] Furthermore, the collection mechanism 6 also includes a positioning post 64 and an auxiliary frame 65. The positioning post 64 is convenient to be inserted into the insertion part 723, which facilitates locking and fixing the position of the collection frame 61 for installation and disassembly. The edge of the back of the auxiliary frame 65 is a certain distance away from the hydraulic cylinder 44, so that the size of the auxiliary frame 65 will not affect the normal up and down movement of the discharge tank 1 or the normal use of the hydraulic cylinder 44. The auxiliary frame 65 can collect the liquid that leaks between the collection frame 61 and the discharge tank 1. The positioning post 64 is fixedly connected to the side of the collection frame 61, and the side of the positioning post 64 is provided with a first slot. The auxiliary frame 65 is fixedly sleeved on the outside of the collection frame 61.

[0087] Specifically, the positioning mechanism 7 includes a support member 71 and a limiting member 72. The support member 71 is located on the support seat 54 and includes a support body 711 and a connecting part 712. The support body 711 facilitates the sliding of the insertion part 723 and the locking part 725 on it, and also facilitates the positioning of the sliding frame 52 to place the first hole frame 2 or the second hole frame 3 in the use position. The connecting part 712 facilitates the support body 711 and makes it easy to fix the support body 711 to the support seat 54. The support body 711 is located on the side of the support seat 54, and the connecting part... 712 is located on the side of the support 711. The top of the connecting part 712 is fixed to the support 54. The limiting member 72 is located on the support 711. The limiting member 72 includes a connecting body 721, a linkage part 722, a plug-in part 723, a positioning part 724, and a locking part 725. The connecting body 721 facilitates the connection and support of the plug-in part 723 and the locking part 725, and drives the plug-in part 723 and the locking part 725 to move horizontally. The plug-in part 723 helps to limit the relative position of the support 711 and the positioning post 64, thereby facilitating the collection frame 61. During installation and disassembly, the distance at which the insertion part 723 disengages from the positioning post 64 is greater than the distance at which the locking part 725 disengages from the sliding bracket 52. The positioning part 724 facilitates the support and positioning of the connector 721, while the locking part 725 helps to limit the relative position of the support body 711 and the sliding bracket 52, thereby facilitating the locking of the position of the sliding bracket 52. This ensures that after the first hole frame 2 and the second hole frame 3 move to the designated position, they are locked and fixed, preventing the first hole frame 2 or the second hole frame 3 from sliding arbitrarily. The connector 721 is located on the side of the support body 711. The linkage part 722 is located at the bottom of the connector 721, the insertion part 723 is fixedly inserted into the linkage part 722, the support body 711 has a second sliding groove on its side, the insertion part 723 is slidably inserted into the inner cavity of the second sliding groove and the first slot, the positioning part 724 is located at the top of the connector 721, the support body 711 has a third sliding groove on its side, the locking part 725 is slidably inserted into the inner cavity of the third sliding groove, the locking part 725 passes through the sliding frame 52, the support seat 54 has a second slot on its side, the locking part 725 is slidably inserted into the inner cavity of the second slot.

[0088] More specifically, the positioning mechanism 7 also includes a positioning cylinder 73, a locking pin 74, a fixing frame 75, a mounting cylinder 76, a sliding rod 77, and a spring 78. The positioning cylinder 73 facilitates the sliding of the locking pin 74 within it. The side of the locking pin 74 has a slope, which facilitates pressing against the support body 711, enabling a quick locking operation. The locking pin 74 helps to limit the relative position of the locking pin 74 and the positioning part 724, thereby helping to lock the connecting body 721 and prevent the connecting body 721 from sliding arbitrarily. The fixing frame 75 helps to limit the movement position of the locking pin 74. The mounting cylinder 76 facilitates the installation of the sliding rod 77. The sliding rod 77 helps to drive the locking pin 74 to move and also helps to guide the deformation of the spring 78. The elastic force of the spring 78 helps to push the locking pin 74 to move, facilitating the locking operation. After the snap-fit ​​post 74 moves, it returns to its original position, facilitating repeated operation of the snap-fit ​​post 74. The spring 78 can be used in conjunction with a damper to improve the stability of the spring 78. The positioning cylinder 73 is fixedly connected to the top of the positioning part 724. The top of the positioning part 724 has a fourth sliding groove that mates with the snap-fit ​​post 74. The top of the support body 711 has a third snap-fit ​​groove. The snap-fit ​​post 74 is slidably inserted into the inner cavity of the third snap-fit ​​groove. The fixing frame 75 is fixedly sleeved on the outside of the snap-fit ​​post 74. The mounting cylinder 76 is threaded into the inside of the positioning cylinder 73. The sliding rod 77 is fixedly connected to the top of the snap-fit ​​post 74. The outer wall of the sliding rod 77 is slidably inserted into the middle of the mounting cylinder 76. The spring 78 is sleeved on the outside of the sliding rod 77. One end of the spring 78 is fixedly connected to the mounting cylinder 76, and the other end of the spring 78 is fixedly connected to the snap-fit ​​post 74.

[0089] Working principle of the invention:

[0090] When the lithium battery needs to be discharged, the support frame 41 is first moved to the position corresponding to the external conveyor belt, and then the docking seat is fixed to the external conveyor belt. The external conveyor belt then transports the lithium battery, which falls into the discharge tank 1 and the first hole frame 2. The first hole frame 2 contains a discharge solution, which is then used to immerse and discharge the lithium battery. The timer counts the discharge time of the number of lithium batteries. After the set time is reached, an opening signal is sent to the controller. After receiving the opening signal, the controller starts the hydraulic cylinder 44. The hydraulic cylinder 44 drives the discharge tank 1 to move downward, and the auxiliary plate 42 slides on the support frame 41. Then the discharge tank 1 is separated from the first hole frame 2, and the discharge tank 1 is placed at the set height. Then the sliding rod 77 is pulled upward to drive the locking post 74 to disengage from the support body 711. At this time, the position limitation of the positioning part 724 is released.

[0091] Then, the connecting body 721 is pulled horizontally to a certain distance, that is, the distance at which the locking part 725 disengages from the sliding frame 52. At this time, the position restriction of the sliding frame 52 is released, and then the sliding frame 52 is pushed to move. The sliding frame 52 drives the sliding column 53 to slide in the support seat 54, and drives the first hole frame 2 to move to the top of the collection frame 61. At this time, the liquid dripping from the first hole frame 2 falls into the inside of the collection frame 61. Then, the second hole frame 3 is installed from the back of the discharge tank 1, and the sliding column 53 enters from the back of the support seat 54, thereby moving the second hole frame 3 to the corresponding position of the discharge tank 1. Then, the connecting body 721 is returned to its original position, and the sliding frame 52 is locked, thereby locking the first hole frame 2 and the second hole frame 3.

[0092] Then, the controller controls the hydraulic cylinder 44 to push the discharge tank 1 upward to the starting position, and at the same time, the external conveyor belt is turned on to continue to transport the lithium battery. Then, the new lithium battery to be discharged falls into the second hole frame 3 and the discharge tank 1 for immersion and discharge. The discharged lithium battery is placed above the collection frame 61 for liquid control operation. After the discharge time is reached, the sliding frame 52 is released from the position restriction, and then the first hole frame 2 slides down to pour out the lithium battery. Then, the second hole frame 3 is moved forward to the top of the collection frame 61, and then the first hole frame 2 is installed from the back, thereby realizing the switching of use.

[0093] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for harmless resource recycling and treatment of lithium batteries, characterized in that: The specific steps include the following: Step 1: Thoroughly discharge the recycled lithium batteries by immersing them in a discharge device containing a conductive salt solution. Step 2: Place the discharged lithium battery into a sealed heating device for drying. Step 3: The dried lithium battery is subjected to multi-stage crushing and screening under inert gas protection, and then fine sorting is carried out to completely separate the copper and aluminum current collector metals from the electrode materials, so as to obtain a high-purity copper-aluminum mixture and black powder rich in lithium, cobalt and nickel. The black powder is added to the reaction vessel and mixed with acid and reducing agent to react, so that lithium, cobalt, nickel and manganese dissolve into the solution. Specifically, the discharge device in step one includes: The discharge tank (1) is provided with a first hole frame (2) and a second hole frame (3) above it. A support mechanism (4) is located outside the discharge tank (1) and is used to support the discharge tank (1). The auxiliary mechanism (5) is located on the support mechanism (4) and is used to support and slide the first hole frame (2) and the second hole frame (3).

2. The method for harmless resource recycling and treatment of lithium batteries according to claim 1, characterized in that: Also includes: Step 4: Impurity removal and separation. Impurities are precipitated by adjusting the pH value or adding a precipitant, and then removed by solid-liquid separation equipment. Step 5: Extraction and back-extraction. Through multi-stage extraction and back-extraction processes, enriched solutions of single metals are obtained respectively. Step Six: Prepare lithium carbonate, cobalt sulfate and ternary precursor products through evaporation concentration, crystallization or precipitation reaction. Then, the waste gas is treated by combustion, adsorption and spraying, the wastewater is treated by neutralization, precipitation and membrane treatment for reuse, and the waste residue is landfilled or retreated.

3. The method for harmless resource recycling and treatment of lithium batteries according to claim 1, characterized in that: The discharge device further includes: Collection mechanism (6), which is located on auxiliary mechanism (5), is used to collect liquid dripping from the first hole frame (2) and the second hole frame (3); Positioning mechanism (7) is located on auxiliary mechanism (5).

4. The method for harmless resource recycling and treatment of lithium batteries according to claim 3, characterized in that: The support mechanism (4) includes: A support frame (41) is located outside the discharge tank (1); An auxiliary plate (42) is fixedly connected to the side of the discharge tank (1). The inner wall of the support frame (41) is provided with a first sliding groove. The auxiliary plate (42) is slidably inserted into the inner cavity of the first sliding groove. Support frame (43), the support frame (43) is fixedly connected to the bottom end of the inner wall of the support frame (41); A hydraulic cylinder (44) is fixedly inserted into the middle of the support frame (43), and the end of the hydraulic cylinder (44) extends to the bottom of the support frame (41); Telescopic rod (45), the telescopic rod (45) is fixedly connected between the bottom end of the inner wall of the discharge tank (1) and the support frame (41); A base support (46) is fixedly connected to the bottom of a support frame (41); The docking seat is fixedly connected to the side of the support frame (41).

5. The method for harmless resource recycling and treatment of lithium batteries according to claim 4, characterized in that: The auxiliary mechanism (5) includes: Assembly frame (51), adjacent assembly frames (51) are respectively fixedly connected to the top of the first hole frame (2) and the second hole frame (3); A sliding frame (52) is fixedly connected to the bottom of the assembly frame (51); The sliding column (53) is fixedly connected to the side of the inner wall of the sliding frame (52).

6. The method for harmless resource recycling and treatment of lithium batteries according to claim 5, characterized in that: The auxiliary mechanism (5) also includes: Support (54), the support (54) is fixedly connected to the side of the support frame (41), and the sliding column (53) is slidably inserted into the inner cavity of the support (54); The guide wheel (55) has grooves at the top and bottom of the sliding column (53), and the guide wheel (55) is rotatably connected to the inside of the groove. The inner wall of the support (54) has a guide groove that cooperates with the guide wheel (55).

7. The method for harmless resource recycling and treatment of lithium batteries according to claim 6, characterized in that: The collection mechanism (6) includes: Collection frame (61), the collection frame (61) is located between adjacent supports (54); Assembly plate (62), said assembly plate (62) is fixedly connected to the side of collection frame (61); Mounting bracket (63) is fixedly connected to the side of support base (54), and the assembly plate (62) is slidably inserted into the inner cavity of mounting bracket (63).

8. The method for harmless resource recycling and treatment of lithium batteries according to claim 7, characterized in that: The collection mechanism (6) also includes: Positioning post (64), the positioning post (64) is fixedly connected to the side of the collection frame (61), and the side of the positioning post (64) is provided with a first slot; An auxiliary frame (65) is fixedly fitted onto the outside of the collection frame (61).

9. The method for harmless resource recycling and treatment of lithium batteries according to claim 8, characterized in that: The positioning mechanism (7) includes: A support member (71) is located on a support (54), and the support member (71) includes: Support (711), the support (711) is located on the side of the support (54); A connecting part (712) is located on the side of the support (711), and the top of the connecting part (712) is fixed to the support (54); A limiting member (72) is located on the support (711), and the limiting member (72) includes: A connector (721) is located on the side of a support (711); Linkage part (722), which is located at the bottom of connector (721); The plug-in part (723) is fixedly plugged into the linkage part (722). The side of the support body (711) is provided with a second sliding groove. The plug-in part (723) is slidably inserted into the inner cavity of the second sliding groove and the first slot. A positioning part (724) is located at the top of the connector (721); The locking part (725) has a third sliding groove on the side of the support (711), and the locking part (725) is slidably inserted into the inner cavity of the third sliding groove. The locking part (725) passes through the sliding frame (52). The support (54) has a second slot on the side, and the locking part (725) is slidably inserted into the inner cavity of the second slot.

10. The method for harmless resource recycling and treatment of lithium batteries according to claim 9, characterized in that: The positioning mechanism (7) also includes: Positioning cylinder (73), which is fixedly connected to the top of positioning part (724); The top of the positioning part (724) is provided with a fourth sliding groove that cooperates with the snap-fit ​​post (74), and the top of the support body (711) is provided with a third slot. The snap-fit ​​post (74) and the inner cavity of the third slot are slidably inserted and connected. A fixing frame (75) is fixedly sleeved on the outside of the snap-fit ​​post (74); Mounting sleeve (76), which is threadedly mounted inside positioning sleeve (73); A sliding rod (77) is fixedly connected to the top of the snap-fit ​​post (74), and the outer wall of the sliding rod (77) is slidably inserted into the middle of the mounting cylinder (76). Spring (78) is sleeved on the outside of sliding rod (77). One end of spring (78) is fixedly connected to mounting cylinder (76), and the other end of spring (78) is fixedly connected to snap-fit ​​post (74).

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