A cathode active material recovery chamber

Abstract

The present invention provides a cathode active material recovery chamber, which includes a container with an open upper end. A cathode active material collector is provided at the bottom of the container. A suspension rack is provided on the container. An electrode clamp is provided on the suspension rack inside the container, and a device containing the cathode active material to be recovered is clamped on the electrode clamp. A solution is contained in the container, and the device is submerged by the solution. A vaporization control device is provided on the suspension rack outside the container. By means of the vaporization control device, the device clamped by the electrode clamp is changed and falls into the cathode active material collector. The recovery chamber of the present invention is composed of a concentric circle recovery belt, an electrode clamp, and an acid-resistant stainless steel chamber body. The overall working environment is in water, which can absorb HF pollutants generated during pulsed discharge and achieve zero pollution to the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of positive electrode active material recovery, and particularly to a positive electrode active material recovery chamber. Background Art

[0002] Lithium-ion batteries are widely used in the fields of power and energy storage. The positive electrode active materials in lithium-ion batteries contain lithium, cobalt, and nickel, all of which are rare elements and are mainly purchased from abroad, facing great challenges in stable supply. The service life of lithium-ion batteries is relatively short, and currently, the recovery rate of retired lithium-ion positive electrode active materials in China is relatively low. In the process of recovering positive electrode active materials, the most important thing is to effectively separate the positive electrode active materials, the positive electrode current collector, and the binder. HF pollutants may be generated during the separation process, causing environmental pollution. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art, and particularly innovatively provides a positive electrode active material recovery chamber.

[0004] To achieve the above object of the present invention, the present invention provides a positive electrode active material recovery chamber, including a container with an open upper end. A positive electrode active material collector is provided at the bottom of the container. A suspension rack is provided on the container. An electrode clamp is provided on the suspension rack inside the container, and a device containing the positive electrode active material to be recovered is clamped on the electrode clamp;

[0005] A solution is contained in the container, and the device is submerged by the solution;

[0006] A vaporization control device is provided on the suspension rack outside the container; by the vaporization control device, the device clamped by the electrode clamp is changed and falls into the positive electrode active material collector.

[0007] In a preferred embodiment of the present invention, the container is made of acid-resistant stainless steel material;

[0008] Or / and the cross-sectional shape of the container is cylindrical;

[0009] Or / and the solution is water.

[0010] In a preferred embodiment of the present invention, the suspension rack includes a first vertical plate (1b), a second vertical plate (1c), a transverse connecting plate (1a), a first transverse support plate (1d), and a second transverse support plate (1e); preferably, a suspension rack handle is provided in the middle area of the transverse connecting plate (1a) for facilitating the taking and placing of the suspension rack.

[0011] The end of the first vertical plate (1b) is perpendicularly and fixedly connected to the end of the transverse connecting plate (1a), and the end of the second vertical plate (1c) is perpendicularly and fixedly connected to the other end of the transverse connecting plate (1a). At this time, the first vertical plate (1b), the second vertical plate (1c), and the transverse connecting plate (1a) form an inverted U-shaped force-applying frame, which can also be called an n-shaped force-applying frame;

[0012] The other end of the first vertical plate (1b) is perpendicularly and fixedly connected to the end of the second transverse support plate (1e), and the distance between the other end of the second transverse support plate (1e) and the second vertical plate (1c) is greater than the distance between the end of the second transverse support plate (1e) and the second vertical plate (1c);

[0013] The other end of the second vertical plate (1c) is perpendicularly and fixedly connected to the end of the first transverse support plate (1d), and the distance between the other end of the first transverse support plate (1d) and the first vertical plate (1b) is greater than the distance between the end of the first transverse support plate (1d) and the first vertical plate (1b).

[0014] In a preferred embodiment of the present invention, the distance between the first vertical plate (1b) and the second vertical plate (1c) is slightly greater than the thickness of the container wall, so that when the suspension bracket is suspended on the container wall, the first transverse support plate (1d) is in a horizontal state.

[0015] In a preferred embodiment of the present invention, the positive electrode active material collector includes an inner container, and M concentric recovery annular bands are arranged in the inner container, where M is a positive integer greater than or equal to 1. From the inside to the outside, they are the 1st concentric recovery annular band, the 2nd concentric recovery annular band, the 3rd concentric recovery annular band,..., the Mth concentric recovery annular band. A plurality of liquid discharge ports with different positions are distributed on the mth concentric recovery annular band and the inner container wall, where m is a positive integer less than or equal to M, that is, a plurality of liquid discharge ports with different positions are distributed on the 1st concentric recovery annular band, the 2nd concentric recovery annular band, the 3rd concentric recovery annular band,..., the Mth concentric recovery annular band and the inner container wall. Preferably, at least one inner container handle extending to the outside of the container is provided on the inner container wall to facilitate the taking and placing of the inner container; the shape of the inner container wall is the same as the shape of the container wall. For example, when the shape of the container is cylindrical, the shape of the inner container wall is also cylindrical, and the outer diameter of the inner container wall is slightly smaller than the inner diameter of the container to facilitate placing the inner container at the bottom of the container. Similarly, when the shape of the container is a rectangular column, the shape of the inner container wall is also a rectangular column.

[0016] In a preferred embodiment of the present invention, the vaporization control device includes a rectangular housing. Inside the rectangular housing, there is a PCB circuit board fixed mounting seat for fixedly mounting a PCB circuit board. The PCB circuit board is fixedly mounted on the PCB circuit board fixed mounting seat. On the PCB circuit board, there are a DC power supply Bat, a first inductor L1, a first resistor R1, a first switch S1, a second switch S2, a third switch S3, and a first capacitor C1;

[0017] The positive output terminal of the DC power supply Bat is connected to the first end of the first inductor L1. The second end of the first inductor L1 is connected to the first end of the third switch S3. The second end of the third switch S3 is connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is connected to the negative output terminal of the DC power supply Bat. A charging circuit is formed by the DC power supply Bat, the inductor L1, the third switch S3, and the first capacitor C1. After closing the third switch S3, the first capacitor C1 is charged. After the first capacitor C1 is fully charged, the third switch S3 is disconnected;

[0018] The first end of the first capacitor C1 is also connected to the first end of the first switch S1. The second end of the first switch S1 is connected to the first end of the first wire among the lead wires. The second end of the first capacitor C1 is also connected to the first end of the second wire among the lead wires. The second end of the first wire among the lead wires is connected to the positive terminal of the electrode clamp. The second end of the first wire among the lead wires is connected to the negative terminal of the electrode clamp. A discharge circuit is formed by the first capacitor C1 and the first switch S1. A pulse wave output is formed by quickly switching the first switch S1;

[0019] The first end of the first capacitor C1 is also connected to the first end of the second switch S2. The second end of the second switch S2 is connected to the first end of the first resistor R1. The second end of the first capacitor C1 is also connected to the second end of the first resistor R1. The first capacitor C1, the second switch S2, and the first resistor R1 form a current discharge circuit. After the work is completed, the second switch S2 is closed. After the first capacitor C1 discharges the current, the second switch S2 is disconnected;

[0020] It further includes a controller. The first control end of the controller is connected to the control end of the first switch S1. The second control end of the controller is connected to the control end of the second switch S2. The third control end of the controller is connected to the control end of the third switch S3, to achieve the closing and opening of the first switch S1, the second switch S2, and the third switch S3.

[0021] In a preferred embodiment of the present invention, it further includes a voltage acquisition module or / and a current collector. The discharge voltage is acquired through the voltage acquisition module, and the discharge current is acquired through the current collector.

[0022] The present invention also discloses a working method for a positive active material recovery chamber, including the following steps:

[0023] S1, Assembly of the positive electrode active material recovery chamber;

[0024] S2, The vaporization control device issues a pulsed discharge;

[0025] S3, Collect the positive electrode active material from the positive electrode active material collector.

[0026] In a preferred embodiment of the present invention, step S1 includes the following steps:

[0027] S11, Prepare a container with an open upper end, made of acid-resistant stainless steel, and having a cylindrical cross-sectional shape;

[0028] S12, Place the positive electrode active material collector into the container;

[0029] S13, Hang the suspension bracket on the container wall. At this time, electrode clamps are correspondingly provided on the first horizontal support plate (1d), and a vaporization control device is correspondingly provided on the second horizontal support plate (1e);

[0030] S14, Pour water into the container so that the device containing the positive electrode active material to be recovered is submerged in the water.

[0031] In a preferred embodiment of the present invention, step S2 includes the following steps:

[0032] S21, The controller determines whether the work button is pressed:

[0033] If the controller receives the trigger signal for pressing the work button, then proceed to the next step;

[0034] If the controller does not receive the trigger signal for pressing the work button, then return to step S21;

[0035] S22, The controller determines whether the electrode clamp holds an object:

[0036] If the electrode clamp holds an object, then proceed to the next step;

[0037] If the electrode clamp does not hold an object, then return to step S21;

[0038] S23, The controller issues a closing control command to the third switch S3. Before this, the first switch S1, the second switch S2, and the third switch S3 are all in the off state; after the third switch S3 receives the closing control command issued by the controller, the third switch S3 closes. After a time t1, the controller issues an opening control command to the third switch S3. After the third switch S3 receives the opening control command issued by the controller, the third switch S3 opens;

[0039] S24. After the third switch S3 is turned off, the controller sends a pulse control command to the first switch S1. After the first switch S1 receives the pulse control command, the first switch S1 closes and opens intermittently, inputting pulsed discharges to the electrode fixture. The device containing the cathode active material to be recycled receives the pulsed discharges, causing its cathode active material to escape.

[0040] S25. Before recycling, the controller sends a turn-off control command to the first switch S1. After the first switch S1 receives the turn-off control command, the first switch S1 turns off. After the first switch S1 turns off, the controller sends a turn-on control command to the second switch S2. After the second switch S2 receives the turn-on control command, the second switch S2 turns on. After a time t2, the controller sends a turn-off control command to the second switch S2. After the second switch S2 receives the turn-off control command, the second switch S2 turns off.

[0041] In a preferred embodiment of the present invention, step S3 includes the following steps:

[0042] S31. Remove the suspension bracket from the container wall;

[0043] S32. Remove the cathode active material collector from the container;

[0044] S33. Collect the cathode active material from the cathode active material collector.

[0045] In summary, due to the adoption of the above technical solutions, the recycling chamber of the present invention is composed of a concentric circle recycling belt, an electrode fixture, and an acid-resistant stainless steel chamber body. The overall working environment is in water, which can absorb HF pollutants generated during pulsed discharges, achieving zero pollution to the environment.

[0046] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0048] Figure 1 is a connection display diagram of the recycling chamber of the present invention.

[0049] Figure 2 is a schematic structural diagram of the suspension bracket of the present invention.

[0050] Figure 3 is a schematic circuit connection diagram of the gasification control module of the present invention.

[0051] Figure 4 is a schematic circuit connection diagram of the voltage acquisition module of the present invention.

[0052] Figure 5 This is a schematic diagram of the circuit connection of the current collector of the present invention.

[0053] Figure 6 This is a schematic diagram of the equivalent circuit connection of the present invention. Specific Embodiments

[0054] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0055] The present invention provides a positive electrode active material recovery chamber, as Figure 1 shown, which includes a container with an open upper end. A positive electrode active material collector is provided at the bottom of the container. A suspension bracket is provided on the container, and an electrode clamp is provided on the suspension bracket inside the container. A device containing the positive electrode active material to be recovered is clamped on the electrode clamp; an inductor for sensing whether the electrode clamp holds an item is provided on the electrode clamp, and the induction output end of the inductor is connected to the induction input end of the controller.

[0056] A solution is filled in the container, and the device is submerged by the solution;

[0057] A vaporization control device is provided on the suspension bracket outside the container; the device clamped by the electrode clamp is changed (vaporized) through the vaporization control device and falls into the positive electrode active material collector.

[0058] Among them, the container is made of acid-resistant stainless steel to ensure normal operation in an acidic environment; by predicting that the positive electrode active material is separated orderly according to the mass ratio under shock wave oscillation and falls back to the bottom of the container, different concentric circle recovery belts are designed according to the escape trajectory of the positive electrode active material. Through the design of the concentric circle recovery belts, the classified recovery of the positive electrode active material is realized.

[0059] In a preferred embodiment of the present invention, the container is made of acid-resistant stainless steel material;

[0060] Or / and the cross-sectional shape of the container is cylindrical;

[0061] Or / and the solution is water.

[0062] In a preferred embodiment of the present invention, as Figure 2 shown, the suspension bracket includes a first vertical plate 1b, a second vertical plate 1c, a transverse connecting plate 1a, a first transverse support plate 1d, and a second transverse support plate 1e;

[0063] The end of the first vertical plate 1b is perpendicularly and fixedly connected to the end of the transverse connecting plate 1a, and the end of the second vertical plate 1c is perpendicularly and fixedly connected to the other end of the transverse connecting plate 1a. At this time, the first vertical plate 1b, the second vertical plate 1c, and the transverse connecting plate 1a form an inverted U-shaped force-bearing frame, which can also be called an n-shaped force-bearing frame;

[0064] The other end of the first vertical plate 1b is perpendicularly and fixedly connected to the end of the second transverse support plate 1e, and the distance between the other end of the second transverse support plate 1e and the second vertical plate 1c is greater than the distance between the end of the second transverse support plate 1e and the second vertical plate 1c;

[0065] The other end of the second vertical plate 1c is perpendicularly and fixedly connected to the end of the first transverse support plate 1d, and the distance between the other end of the first transverse support plate 1d and the first vertical plate 1b is greater than the distance between the end of the first transverse support plate 1d and the first vertical plate 1b.

[0066] In a preferred embodiment of the present invention, the distance between the first vertical plate 1b and the second vertical plate 1c is slightly greater than the thickness of the container wall, so that when the suspension frame is suspended on the container wall, the first transverse support plate 1d is in a horizontal state.

[0067] In a preferred embodiment of the present invention, the positive electrode active material collector includes an inner container, and M concentric recovery belts are arranged in the inner container, where M is a positive integer greater than or equal to 1. From the inside to the outside, they are the 1st concentric recovery belt, the 2nd concentric recovery belt, the 3rd concentric recovery belt,..., the Mth concentric recovery belt. A plurality of liquid discharge ports with different positions are distributed on the mth concentric recovery belt and the inner container wall, where m is a positive integer less than or equal to M, that is, a plurality of liquid discharge ports with different positions are distributed on the 1st concentric recovery belt, the 2nd concentric recovery belt, the 3rd concentric recovery belt,..., the Mth concentric recovery belt and the inner container wall.

[0068] In a preferred embodiment of the present invention, the vaporization control device includes a rectangular-shaped housing. A touch display screen is arranged on the surface of the rectangular-shaped housing. A PCB circuit board fixed mounting seat for fixedly mounting a PCB circuit board is arranged in the rectangular-shaped housing. The PCB circuit board is fixedly mounted on the PCB circuit board fixed mounting seat. A vaporization control module is arranged on the PCB circuit board, as Figure 3 shown, the vaporization control module includes a DC power supply Bat, a first inductor L1, a first resistor R1, a first switch S1, a second switch S2, a third switch S3, and a first capacitor C1;

[0069] The positive output terminal of the DC power supply Bat is connected to the first end of the first inductor L1. The second end of the first inductor L1 is connected to the first end of the third switch S3. The second end of the third switch S3 is connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is connected to the negative output terminal of the DC power supply Bat. A charging circuit is formed by the DC power supply Bat, the inductor L1, the third switch S3, and the first capacitor C1. After closing the third switch S3, the first capacitor C1 is charged. After the first capacitor C1 is fully charged, the third switch S3 is disconnected;

[0070] The first end of the first capacitor C1 is also connected to the first end of the first switch S1. The second end of the first switch S1 is connected to the first end of the first wire in the lead wire. The second end of the first capacitor C1 is also connected to the first end of the second wire in the lead wire; The second end of the first wire in the lead wire is connected to the positive terminal of the electrode fixture. The second end of the first wire in the lead wire is connected to the negative terminal of the electrode fixture; A discharge circuit is formed by the first capacitor C1 and the first switch S1. A pulse wave output is formed by quickly switching the first switch S1;

[0071] The first end of the first capacitor C1 is also connected to the first end of the second switch S2. The second end of the second switch S2 is connected to the first end of the first resistor R1. The second end of the first capacitor C1 is also connected to the second end of the first resistor R1; A current bleeding circuit is formed by the first capacitor C1, the second switch S2, and the first resistor R1. After the work is completed, the second switch S2 is closed. After the first capacitor C1 finishes bleeding current, the second switch S2 is disconnected;

[0072] It further includes a controller. The first control end of the controller is connected to the control end of the first switch S1. The second control end of the controller is connected to the control end of the second switch S2. The third control end of the controller is connected to the control end of the third switch S3 to realize the closing and opening of the first switch S1, the second switch S2, and the third switch S3; The touch display end of the controller is connected to the touch display end of the touch display screen. There is a virtual work button displayed on the touch display screen. When the work button is pressed, the controller receives the trigger signal for pressing the work button at this time.

[0073] In a preferred embodiment of the present invention, it further includes a voltage acquisition module or / and a current collector. The discharge voltage is acquired through the voltage acquisition module, and the discharge current is acquired through the current collector.

[0074] As Figure 4As shown, the voltage acquisition module includes a large resistor and a small resistor. The first end of the large resistor is connected to the first end of capacitor C1. The second end of the large resistor is connected to the first end of the small resistor. The second end of the small resistor is connected to the second end of capacitor C1. The first end of the small resistor is also connected to the first voltage measurement end of the controller, and the second end of the small resistor is also connected to the second voltage measurement end of the controller. The calculation method of the discharge voltage is as follows:

[0075]

[0076] That is,

[0077] where U 放电 represents the discharge voltage;

[0078] R 大 represents the resistance value of the large resistor;

[0079] R 小 represents the resistance value of the small resistor;

[0080] u 放电 represents the voltage value of the small resistor measured by the controller.

[0081] A switch that can be turned on and off can also be set between the large resistor and capacitor C1. The connection is such that the first end of capacitor C1 is connected to the first end of the switch, the second end of the switch is connected to the first end of the large resistor, and the control end of the switch is connected to the switching control end of the controller to achieve the opening and closing of voltage measurement.

[0082] Such as Figure 5 As shown, the current collector includes a box-shaped housing 3. A hinged semi-circular left clamping portion 2b and a semi-circular right clamping portion 2a extend from the upper end of the housing 3. A left handle 5b and a right handle 5a extend from the lower end of the housing 3. The left handle 5b is fixedly connected to the left clamping portion 2b, and the right handle 5a is fixedly connected to the right clamping portion 2a. When the ends of the left clamping portion 2b and the right clamping portion 2a are brought into contact through the left handle 5b and the right handle 5a, a circular hollow 1 is formed;

[0083] It further includes an induced electromotive force winding mounting seat for fixedly installing the induced electromotive force winding and a circuit board fixed mounting seat for fixedly installing the circuit board inside the housing 3. The induced electromotive force winding is mounted on the induced electromotive force winding mounting seat, and the circuit board is fixedly mounted on the circuit board fixed mounting seat. A current display screen 3 is also provided on the housing 3, and a current controller and an induced electromotive force acquisition module are provided on the circuit board; the first output end of the induced electromotive force winding is connected to the first input end of the induced electromotive force acquisition module, the second output end of the induced electromotive force winding is connected to the second input end of the induced electromotive force acquisition module, the first output end of the induced electromotive force acquisition module is connected to the first voltage acquisition end of the current controller, the second output end of the induced electromotive force acquisition module is connected to the second voltage acquisition end of the current controller, and the display end of the current display screen 3 is connected to the display end of the current controller.

[0084] As Figure 6 shown, the induced electromotive force acquisition module includes: the first end of an inductor L0 is connected to the first output end of the induced electromotive force winding, the second end of the inductor L0 is connected to the first end of a test resistor R, and the second end of the test resistor R is connected to the second output end of the induced electromotive force winding; the first end of the test resistor R is also connected to the first voltage acquisition end of the current controller, and the second end of the test resistor R is also connected to the second voltage acquisition end of the current controller.

[0085] The coil on the induced electromotive force winding is equivalent to a circular current-carrying wire, and the magnitude of the magnetic induction intensity B generated at a point on the axis of the circular current-carrying wire is:

[0086]

[0087] where B represents the magnetic induction intensity generated at a point on the axis of the circular current-carrying wire;

[0088] μ0 represents the magnetic permeability of air;

[0089] n represents the number of turns of the coil;

[0090] I represents the discharge current flowing through the coil;

[0091] R represents the radius of the coil;

[0092] x represents the distance from a point on the axis to the center of the coil;

[0093] The relationship between the induced electromotive force and the induced current:

[0094]

[0095] where e(t) represents the induced electromotive force;

[0096] L0 represents the inductance value of the inductor L0;

[0097] d represents differentiation;

[0098] i(t) represents the induced current;

[0099] t represents time;

[0100] B represents the magnetic induction intensity generated at a point on the axis of a circular current-carrying wire;

[0101] S represents the coil area;

[0102] Since the equivalent resistance of the coil is less than the resistance value of the test resistor R, and the test resistor R and the inductor satisfy the relationship R >> ωL0. Also, because the signal U measured by the current controller is U = Ri(t), we get:

[0103]

[0104] Among them, U represents the signal voltage measured by the current controller;

[0105] e(t) represents the induced electromotive force;

[0106] d represents differentiation;

[0107] B represents the magnetic induction intensity generated at a point on the axis of a circular current-carrying wire;

[0108] S represents the coil area;

[0109] t represents time;

[0110] The following integral calculation is performed on the signal U:

[0111]

[0112] Among them, B represents the magnetic induction intensity generated at a point on the axis of a circular current-carrying wire;

[0113] t1 represents the measurement termination time;

[0114] t0 represents the starting time;

[0115] U represents the signal voltage measured by the current controller;

[0116] S represents the coil area;

[0117] d represents differentiation;

[0118] t represents time;

[0119] In the formula, I is the discharge current flowing through the coil, R is the coil radius, x is the distance from a point on the axis to the coil center, S is the coil area, and n is the number of coil turns.

[0120] The present invention also discloses a working method of a positive electrode active material recovery chamber, including the following steps:

[0121] S1, Assembly of the positive electrode active material recovery chamber;

[0122] S2, The vaporization control device emits pulsed discharges;

[0123] S3, Collect the positive electrode active material from the positive electrode active material collector.

[0124] In a preferred embodiment of the present invention, step S1 includes the following steps:

[0125] S11, Prepare a container with an open upper end, made of acid-resistant stainless steel, and having a cylindrical cross-sectional shape;

[0126] S12, Place the positive electrode active material collector into the container;

[0127] S13, Hang the suspension rack on the container wall. At this time, electrode clamps are correspondingly provided on the first horizontal support plate 1d, and a vaporization control device is correspondingly provided on the second horizontal support plate 1e;

[0128] S14, Pour water into the container so that the device containing the positive electrode active material to be recovered is submerged in the water.

[0129] In a preferred embodiment of the present invention, step S2 includes the following steps:

[0130] S21, The controller determines whether the working button is pressed:

[0131] If the controller receives the trigger signal for pressing the working button, proceed to the next step;

[0132] If the controller does not receive the trigger signal for pressing the working button, return to step S21;

[0133] S22, The controller determines whether the electrode clamp holds a clamped object:

[0134] If the electrode clamp holds a clamped object, proceed to the next step;

[0135] If the electrode clamp does not hold a clamped object, return to step S21;

[0136] S23, The controller sends a closing control command to the third switch S3. Before this, the first switch S1, the second switch S2, and the third switch S3 are all in the off state; after the third switch S3 receives the closing control command sent by the controller, the third switch S3 closes. After a time t1, the controller sends a disconnection control command to the third switch S3. After the third switch S3 receives the disconnection control command sent by the controller, the third switch S3 disconnects;

[0137] S24. After the third switch S3 is turned off, the controller sends a pulse control command to the first switch S1. After receiving the pulse control command, the first switch S1 closes and opens intermittently, inputting pulsed discharges to the electrode fixture. The device containing the positive active material to be recycled receives the pulsed discharges, causing its positive active material to escape.

[0138] S25. Before recycling, the controller sends a turn-off control command to the first switch S1. After receiving the turn-off control command, the first switch S1 turns off. After the first switch S1 turns off, the controller sends a turn-on control command to the second switch S2. After receiving the turn-on control command, the second switch S2 turns on. After a time t2, the controller sends a turn-off control command to the second switch S2. After receiving the turn-off control command, the second switch S2 turns off.

[0139] In a preferred embodiment of the present invention, step S3 includes the following steps:

[0140] S31. Remove the suspension bracket from the container wall.

[0141] S32. Remove the positive active material collector from the container.

[0142] S33. Collect the positive active material from the positive active material collector.

[0143] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cathode active material recovery chamber, comprising a container with an open upper end, characterized in that, A positive electrode active material collector is provided at the bottom of the container, a suspension bracket is provided on the container, an electrode clamp is provided on the suspension bracket inside the container, and a device containing the positive electrode active material to be recycled is clamped on the electrode clamp. A solution is contained in the container, and the device is submerged by the solution; the container is made of acid-resistant stainless steel material, and the solution is water. A vaporization control device is provided on the suspension bracket outside the container; the vaporization control device includes a rectangular-shaped housing, and a PCB circuit board fixed mounting seat for fixedly mounting a PCB circuit board is provided inside the rectangular-shaped housing, and the PCB circuit board is fixedly mounted on the PCB circuit board fixed mounting seat; the device clamped by the electrode clamp is vaporized through the vaporization control device and falls into the positive electrode active material collector. The suspension bracket includes a first vertical plate (1b), a second vertical plate (1c), a transverse connecting plate (1a), a first transverse support plate (1d), and a second transverse support plate (1e). The end of the first vertical plate (1b) is perpendicularly and fixedly connected to the end of the transverse connecting plate (1a), and the end of the second vertical plate (1c) is perpendicularly and fixedly connected to the other end of the transverse connecting plate (1a). At this time, the first vertical plate (1b), the second vertical plate (1c), and the transverse connecting plate (1a) form an inverted U-shaped force-bearing frame. The other end of the first vertical plate (1b) is perpendicularly and fixedly connected to the end of the second transverse support plate (1e), and the distance between the other end of the second transverse support plate (1e) and the second vertical plate (1c) is greater than the distance between the end of the second transverse support plate (1e) and the second vertical plate (1c). The other end of the second vertical plate (1c) is perpendicularly and fixedly connected to the end of the first transverse support plate (1d), and the distance between the other end of the first transverse support plate (1d) and the first vertical plate (1b) is greater than the distance between the end of the first transverse support plate (1d) and the first vertical plate (1b). The positive electrode active material collector includes an inner container, and concentric recovery annular bands are arranged inside the inner container. The is a positive integer greater than or equal to 1. From the inside to the outside, they are the 1st concentric recovery annular band, the 2nd concentric recovery annular band, the 3rd concentric recovery annular band, ……, the th concentric recovery annular band. A plurality of liquid discharge ports with different positions are distributed on the th concentric recovery annular band and the inner container wall. The is a positive integer less than or equal to . That is, a plurality of liquid discharge ports with different positions are distributed on the 1st concentric recovery annular band, the 2nd concentric recovery annular band, the 3rd concentric recovery annular band, ……, the th concentric recovery annular band and the inner container wall.

2. The cathode active material recovery chamber according to claim 1, characterized in that, The cross-sectional shape of the container is cylindrical.

3. The cathode active material recovery chamber according to claim 1, characterized in that, The distance between the first vertical plate (1b) and the second vertical plate (1c) is slightly greater than the thickness of the container wall, so that the first transverse support plate (1d) is in a horizontal state when the suspension bracket is suspended on the container wall.

4. The cathode active material recovery chamber according to claim 1, characterized in that, It further includes a voltage acquisition module or / and a current collector. The discharge voltage is acquired through the voltage acquisition module, and the discharge current is acquired through the current collector.

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