A lithium iron phosphate battery positive electrode material recovery device

Abstract

The present invention relates to the technical field of waste battery recycling, and in particular to a device for recycling positive electrode materials of lithium iron phosphate batteries. The present invention provides a device for recycling positive electrode materials of lithium iron phosphate batteries that can perform sufficient electrolysis by circulating motion and improve electrolysis efficiency and effect. A device for recycling positive electrode materials of lithium iron phosphate batteries includes an electrolytic cell, a cover plate, a cationic diaphragm and an electrolysis mechanism. The top of the electrolytic cell is clamped with a cover plate, the middle position of the electrolytic cell is connected to a cationic diaphragm, a feed port is opened on the right side of the electrolytic cell, and an electrolysis mechanism is arranged on the electrolytic cell. The present invention drives the screw to rotate by driving the output shaft of the motor, so that the mounting frame can drive the electrode assembly to slide back and forth along the limit rod, and the positive and negative electrodes of the lithium iron phosphate battery material in the electrolytic cell are electrolytically separated, so as to improve the separation efficiency and separation effect, and avoid electrolysis omissions and residues.

Description

Technical Field

[0001] The invention relates to the technical field of waste battery recycling, and in particular to a lithium iron phosphate battery positive electrode material recycling device. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery that has attracted widespread attention for its relative safety, stability and long life, especially in some applications that have high requirements for battery safety performance. The positive electrode material of the lithium iron phosphate battery is lithium iron phosphate, which is a lithium ion conductive material. Compared with other positive electrode materials, such as lithium cobalt oxide or lithium manganese oxide, it has higher thermal stability and safety. Therefore, when the lithium iron phosphate battery is discarded, the positive electrode material of the lithium iron phosphate battery is generally recycled for recycling. The existing lithium iron phosphate battery positive electrode material recycling device is relatively fixed in position during electrolysis treatment, and the electrolysis efficiency of the material far away from the electrolysis equipment is reduced, thereby increasing the overall electrolysis time. In this case, the electrolysis effect is also relatively weak, and electrolysis omissions and residues are prone to occur.

[0003] Therefore, in order to solve the above problems, a lithium iron phosphate battery positive electrode material recovery device is developed which has a cyclic motion to fully electrolyze and improve the electrolysis efficiency and effect. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art devices that, during electrolysis treatment, the position is relatively fixed, the electrolysis efficiency of materials far away from the electrolysis equipment is reduced, thereby increasing the overall electrolysis time, and the electrolysis effect is relatively weak in this case, and electrolysis omissions and residues are prone to occur, the present invention provides a lithium iron phosphate battery positive electrode material recovery device with cyclic motion to fully electrolyze and improve electrolysis efficiency and effect.

[0005] The technical implementation scheme of the present invention is: a lithium iron phosphate battery positive electrode material recovery device, including an electrolytic cell, a cover plate, a cationic diaphragm and an electrolytic mechanism, the cover plate is clamped on the top of the electrolytic cell, the cationic diaphragm is connected to the middle position inside the electrolytic cell, a feed port is opened on the right side of the electrolytic cell, and an electrolytic mechanism is provided on the electrolytic cell.

[0006] Furthermore, the electrolysis mechanism includes a mounting frame, a screw rod, a limit rod, a drive motor and an electrode assembly. Two front and rear screw rods are rotatably connected to the upper part of the electrolytic cell, two limit rods are connected to the upper part of the electrolytic cell, and two left-right symmetrical drive motors are connected to the front side of the upper part of the electrolytic cell. The output shafts of the drive motors are connected to adjacent screw rods, the limit rods are slidably connected to the mounting frames, the mounting frames are threadedly connected to the adjacent screw rods, and the bottom of the mounting frames are connected to the electrode assemblies.

[0007] Furthermore, it also includes a condensation mechanism, which includes a condensation chamber, a condensation tube and a temperature control component. The front sides of the left and right parts of the electrolytic cell are connected to the condensation chamber, the inside of the condensation chamber is connected to the condensation tube, the upper ends of the condensation tubes are clamped with the cover plate, the lower ends of the condensation tubes pass through the condensation chamber, and the inside of the condensation chamber is connected to the temperature control component.

[0008] Furthermore, a moving mechanism is also included, which includes a rack rack, a rotating shaft, a first gear, a mounting member and a first spur rack. The left and right parts of the electrolytic cell are connected to the rack rack, and the mounting member is connected to the left and right mounting members. The rotating shaft is rotatably connected between the left and right adjacent mounting members, two first gears are connected to one side of the rotating shaft, and a first gear is connected to the other side of the rotating shaft. Four first spur racks that mesh with the corresponding first gears are connected to the electrode assembly.

[0009] Furthermore, a stirring mechanism is also included, which includes a mounting plate, a stirring member, a second gear and a second spur rack. Four mounting plates are connected to the outside of the mounting frame, and stirring members are rotatably connected between the left and right adjacent mounting plates. The stirring members are connected to the second gear. Eight second spur racks are connected to the left and right walls of the electrolytic cell, and the second spur racks are meshed with the adjacent second gears.

[0010] Furthermore, it also includes a neutralization mechanism, which includes a feeding frame and an acid-base detector. The feeding frame is connected to the right rear side of the electrolytic cell, and the acid-base detector is connected to the rear wall of the electrolytic cell. The acid-base detector is connected and communicated with the feeding frame.

[0011] Furthermore, it also includes a hair blowing mechanism, which includes an air suction member, an air outlet frame and a duct. Two symmetrical air suction members are connected to the upper rear side of the cover plate, two ducts are connected to the rear side of the air suction members, and the air outlet frames are connected between the left and right adjacent ducts.

[0012] Furthermore, ribs for reinforcing stability are connected to the electrolytic cell.

[0013] Furthermore, the electrode assembly includes an electrode sheet, a battery and connecting wires. Two electrode sheets are slidably connected to the mounting frame, which are symmetrical in front and back. The front side of the upper part of the electrolytic cell is connected to the battery, and connecting wires are connected between the battery and the corresponding electrode sheets.

[0014] Furthermore, the stirring element is a cross-shaped fan blade structure.

[0015] The present invention has the following advantages: 1. The present invention drives the screw to rotate by driving the output shaft of the motor, so that the mounting frame can drive the electrode assembly to slide back and forth along the limit rod, and perform positive and negative electrolytic separation of the lithium iron phosphate battery material in the electrolytic cell, thereby improving the separation efficiency and separation effect and avoiding electrolytic omissions and residues.

[0016] 2. The present invention connects the condenser with the cover plate, so that the gas generated by the lithium iron phosphate battery material during the electrolysis process can pass through the condensation chamber, liquefy the gas under the action of temperature, and finally be discharged through the condenser, avoiding the gas from being directly discharged into the air to cause pollution, thereby achieving an environmental protection effect.

[0017] 3. The present invention enables the electrode assembly to automatically move along the limiter, so that the rack frame drives the first gear to start rotating, thereby causing the electrode sheets in the electrode assembly to reciprocate back and forth, continuously performing a cycle of approaching and moving away, thereby improving the electrolysis efficiency and extending the service life.

[0018] 4. The present invention drives the electrode assembly to reciprocate forward and backward through the mounting frame, so that during the movement of the mounting frame, the second spur rack acts on the second gear, so that the stirring element can stir and turn the electrolyte while the electrode assembly is electrolyzed and separated, further improving the electrolysis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the electrolysis mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the condensing mechanism of the present invention.

[0023] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the condensing mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the present invention.

[0025] Figure 7 It is a partial three-dimensional structural schematic diagram of the moving mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the stirring mechanism of the present invention.

[0027] Fig. 9 It is a partial three-dimensional structural schematic diagram of the stirring mechanism of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the neutralization mechanism of the present invention.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of the hair dryer mechanism of the present invention.

[0030] The meanings of the reference numerals in the figure are as follows: 1: electrolytic cell, 2: cover plate, 3: cationic diaphragm, 4: feed port, 5: electrolysis mechanism, 51: mounting frame, 52: screw rod, 53: limiting rod, 54: driving motor, 55: electrode assembly, 6: condensation mechanism, 61: condensation chamber, 62: condensation tube, 63: temperature regulating component, 7: moving mechanism, 71: rack rack, 72: rotating shaft, 73: first gear, 74: mounting component, 75: first spur rack, 8: stirring mechanism, 81: mounting plate, 82: stirring component, 83: second gear, 84: second spur rack, 9: neutralization mechanism, 91: feeding frame, 92: acid-base detector, 10: air blowing mechanism, 101: air suction component, 102: air outlet frame, 103: duct. DETAILED DESCRIPTION

[0031] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] A lithium iron phosphate battery positive electrode material recovery device, such as Figure 1 and Figure 2 As shown, it includes an electrolytic cell 1, a cover plate 2, a cationic diaphragm 3 and an electrolytic mechanism 5. The electrolytic cell 1 is connected to a rib plate for reinforcing stability. The cover plate 2 is clamped on the top of the electrolytic cell 1. The middle position of the electrolytic cell 1 is connected to a cationic diaphragm 3 for screening anions and cations. A feed port 4 is opened on the right side of the electrolytic cell 1. The electrolytic cell 1 is provided with an electrolytic mechanism 5 for circulating and separating the positive and negative electrode materials inside the battery.

[0033] It should be noted that when recycling the positive electrode material of the lithium iron phosphate battery, the present device can be used to perform corresponding separation and electrolysis of the positive and negative electrodes of the lithium iron phosphate battery material. First, the cover plate 2 is opened, and the electrolyte is injected into the electrolytic cell 1. Then the cover plate 2 is closed, and the lithium iron phosphate battery material is introduced into the electrolytic cell 1 through the feed port 4. Then the electrolysis mechanism 5 is started. After the electrolysis mechanism 5 is started, it will circulate in the electrolytic cell 1, so that the lithium iron phosphate battery material can be quickly electrolyzed and separated in the electrolyte. Then, under the action of the cationic diaphragm 3, the positive and negative electrode ions can be quickly separated and screened, so as to achieve the effect of quickly recovering the positive electrode material.

[0034] like Figure 1-Figure 3As shown, the electrolysis mechanism 5 includes a mounting frame 51, a screw rod 52, a limiting rod 53, a drive motor 54 and an electrode assembly 55. The upper part of the electrolytic cell 1 is rotatably connected to two front and rear screw rods 52, and the upper part of the electrolytic cell 1 is connected to two limiting rods 53. The limiting rods 53 are located on the outside of adjacent screw rods 52. The front side of the upper part of the electrolytic cell 1 is connected to two left-right symmetrical drive motors 54. The output shafts of the drive motors 54 are all arranged to face backward, and the output shafts of the drive motors 54 are all connected to adjacent screw rods 52. The limiting rods 53 are all slidably connected to the mounting frame 51, and the mounting frame 51 is threadedly connected to the adjacent screw rods 52. The bottom of the mounting frame 51 is connected to an electrode assembly 55 for electrolytic separation of lithium iron phosphate battery materials. The electrode assembly 55 includes an electrode sheet, a battery and a connecting wire. The mounting frame 51 is slidably connected to two front-to-back symmetrical electrode sheets. The front side of the upper part of the electrolytic cell 1 is connected to a battery, and connecting wires are connected between the battery and the corresponding electrode sheets.

[0035] It should be noted that when the lithium iron phosphate battery material is subjected to electrolytic separation treatment, after the lithium iron phosphate battery material and the electrolyte are both put in, the drive motor 54 and the electrode assembly 55 are started, and the output shaft of the drive motor 54 starts to rotate, which will drive the corresponding screw rod 52 to rotate, so that the mounting frame 51 drives the electrode assembly 55 to slide back and forth along the limit rod 53. When the electrode assembly 55 is started, the battery will introduce current into the electrode sheet through the connecting wire, so that the electrode sheet starts to work with electricity. As the electrode assembly 55 circulates in the electrolyte, the lithium iron phosphate battery material in the electrolyte will be electrolyzed for positive and negative separation, so as to facilitate the operator to separate and recycle the positive electrode material of the lithium iron phosphate battery. In summary, the screw rod 52 is driven to rotate by the output shaft of the drive motor 54, so that the mounting frame 51 can drive the electrode assembly 55 to slide back and forth along the limit rod 53, and the positive and negative electrodes of the lithium iron phosphate battery material in the electrolytic cell 1 are electrolytically separated, thereby improving the separation efficiency and separation effect, and avoiding electrolysis omissions and residues.

[0036] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, it also includes a condensation mechanism 6, which includes a condensation chamber 61, a condensation tube 62 and a temperature control component 63. The front sides of the left and right parts of the electrolytic cell 1 are connected to the condensation chamber 61 for condensing and liquefying the exhaust gas. The condensation tube 62 is connected to the inside of the condensation chamber 61. The upper ends of the condensation tubes 62 are clamped with the cover plate 2, and the lower ends of the condensation tubes 62 pass through the condensation chamber 61. The lower ends of the condensation tubes 62 are used to be connected to an external collecting device. The inside of the condensation chamber 61 is connected to a temperature control component 63 for adjusting the condensation temperature.

[0037] It should be noted that when the lithium iron phosphate battery material is in the electrolysis process, some harmful gases will be generated. In order to prevent the gas from floating in the air and being inhaled by the operator, the gas can be guided by the condenser 62 to allow the gas to enter the condensation chamber 61. Then, the temperature inside the condensation chamber 61 is adjusted using the thermostat 63 according to the gas liquefaction temperature, so that the gas can be quickly liquefied when passing through the condensation chamber 61. The liquefied gas will be guided by the condenser 62 and enter the external collection equipment to reduce gas generation and achieve environmental protection effects. In summary, the condenser 62 is connected to the cover plate 2, so that the gas generated by the lithium iron phosphate battery material during the electrolysis process can pass through the condensation chamber 61, and the gas is liquefied under the action of temperature, and finally discharged through the condenser 62, so as to avoid the gas being directly discharged into the air to cause pollution and achieve environmental protection effects.

[0038] like Figure 2 , Figure 6 and Figure 7 As shown, a moving mechanism 7 is also included, and the moving mechanism 7 includes a rack rack 71, a rotating shaft 72, a first gear 73, a mounting member 74 and a first straight rack 75. The left and right parts of the electrolytic cell 1 are connected to the rack rack 71, and the mounting frame 51 is connected to the left and right mounting members 74. The rotating shaft 72 is rotatably connected between the left and right adjacent mounting members 74. Two first gears 73 are connected to one side of the rotating shaft 72, and a first gear 73 is connected to the other side of the rotating shaft 72. Four first straight racks 75 that mesh with the corresponding first gears 73 are connected to the electrode assembly 55.

[0039] It should be noted that as the electrode assembly 55 reciprocates back and forth along the limit rod 53, the electrode assembly 55 will synchronously drive the mounting member 74 to move, so that under the action of the rack frame 71, the adjacent first gears 73 all start to rotate accordingly. At this time, the rotating shaft 72 will also synchronously drive the adjacent first gears 73 to rotate. When rotating, the first gear 73 will rotate according to the law of reciprocating back and forth, so that the first straight rack 75 drives the electrode sheets in the electrode assembly 55 to reciprocate back and forth, that is, when the electrode assembly 55 is in motion, the electrode sheets in the electrode assembly 55 will begin to move in two cycles of approaching and moving away from each other. When the electrode sheets approach each other, the electrolysis efficiency will be increased. When the electrode sheets move away from each other, the electrode sheets will be prevented from being damaged due to being too close for a long time. In summary, the electrode assembly 55 automatically moves along the limit member, so that the rack frame 71 drives the first gear 73 to start rotating, so that the electrode sheets in the electrode assembly 55 reciprocate back and forth, and continuously perform the movement cycle of approaching and moving away, thereby improving the electrolysis efficiency and extending the service life.

[0040] like Figure 2 , Figure 8 and Fig. 9As shown, a stirring mechanism 8 is also included, and the stirring mechanism 8 includes a mounting plate 81, a stirring member 82, a second gear 83 and a second spur rack 84. Four mounting plates 81 are connected to the outside of the mounting frame 51, and stirring members 82 are rotatably connected between the left and right adjacent mounting plates 81. The stirring members 82 are cross-shaped fan blade structures, and the stirring members 82 are connected to the second gears 83. Eight second spur racks 84 are connected to the left and right walls of the electrolytic cell 1, and the second spur racks 84 are meshed with the adjacent second gears 83.

[0041] It should be noted that when the mounting frame 51 starts to drive the electrode assembly 55 to reciprocate back and forth, the mounting plate 81 will drive the corresponding stirring member 82 to move. When the stirring members 82 start to move, under the action of the second spur rack 84, the second gear 83 will rotate accordingly, so that the stirring members 82 start to rotate. The stirring members 82 will stir the electrolyte during the rotation, thereby further improving the electrolysis effect. In summary, the electrode assembly 55 is driven to reciprocate back and forth by the mounting frame 51, so that during the movement of the mounting frame 51, the second spur rack 84 acts on the second gear 83, so that the stirring member 82 can stir and stir the electrolyte while the electrode assembly 55 is electrolytically separated, thereby further improving the electrolysis efficiency.

[0042] like Figure 2 and Fig.10 As shown, it also includes a neutralization mechanism 9, which includes a feeding frame 91 and an acid-base detector 92. The right rear side of the electrolytic cell 1 is connected to the feeding frame 91 for placing acidic materials, and the inner rear wall of the electrolytic cell 1 is connected to the acid-base detector 92 for detecting the acidity and alkalinity of the electrolyte. The acid-base detector 92 is connected and communicated with the feeding frame 91.

[0043] It should be noted that when the lithium iron phosphate battery material is electrolyzed and separated, the acidity and alkalinity of the electrolyte are monitored in real time by relying on the acid-base detector 92. When the electrolyte is obviously acidic, in order to avoid damage to the internal molecules, the acidic substance in the feeding frame 91 can be introduced into the electrolytic cell 1 by relying on the acid-base detector 92, thereby achieving the effect of acid-base neutralization.

[0044] like Figure 1 and Fig.11 As shown, it also includes a hair dryer mechanism 10, which includes an air suction member 101, an air outlet frame 102 and a duct 103. Two symmetrical air suction members 101 are connected to the upper rear side of the cover plate 2, and two ducts 103 are connected to the rear sides of the air suction members 101. An air outlet frame 102 for generating airflow is connected between the adjacent ducts 103 on the left and right.

[0045] It should be noted that in order to improve the exhaust gas emission efficiency, when electrolytic exhaust gas is generated, the suction piece 101 can be started to introduce the external airflow into the duct 103, and the duct 103 then sends the airflow into the air outlet frame 102. The air outlet frame 102 is used to send the airflow into the electrolytic cell 1, so that the airflow can smoothly enter the condenser 62.

[0046] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A lithium iron phosphate battery positive electrode material recovery device, characterized in that: The invention comprises an electrolytic cell (1), a cover plate (2), a cationic diaphragm (3) and an electrolytic mechanism (5), wherein the cover plate (2) is clamped on the top of the electrolytic cell (1), the cationic diaphragm (3) is connected to the middle position inside the electrolytic cell (1), a feed inlet (4) is opened on the right side of the electrolytic cell (1), and the electrolytic mechanism (5) is arranged on the electrolytic cell (1); The electrolysis mechanism (5) comprises a mounting frame (51), a screw rod (52), a limiting rod (53), a driving motor (54) and an electrode assembly (55); the upper part of the electrolytic cell (1) is rotatably connected to two front and rear screw rods (52); the upper part of the electrolytic cell (1) is connected to two limiting rods (53); the upper front side of the electrolytic cell (1) is connected to two driving motors (54) symmetrically on the left and right; the output shafts of the driving motors (54) are connected to adjacent screw rods (52); the limiting rods (53) are slidably connected to the mounting frame (51); the mounting frame (51) is threadedly connected to the adjacent screw rods (52); and the bottom of the mounting frame (51) is connected to the electrode assembly (55); It also includes a condensation mechanism (6), the condensation mechanism (6) including a condensation chamber (61), a condensation tube (62) and a temperature control component (63), the front sides of the left and right parts of the electrolytic cell (1) are both connected to the condensation chamber (61), the interior of the condensation chamber (61) is connected to the condensation tube (62), the upper ends of the condensation tubes (62) are both clamped to the cover plate (2), the lower ends of the condensation tubes (62) pass through the condensation chamber (61), and the interior of the condensation chamber (61) is connected to the temperature control component (63); The electrolytic cell (1) further comprises a moving mechanism (7), the moving mechanism (7) comprising a rack frame (71), a rotating shaft (72), a first gear (73), a mounting member (74) and a first spur rack (75); the left and right parts of the electrolytic cell (1) are both connected to the rack frame (71); the mounting frame (51) is both connected to the left and right mounting members (74); the rotating shaft (72) is rotatably connected between the left and right adjacent mounting members (74); one side of the rotating shaft (72) is connected to two first gears (73); the other side of the rotating shaft (72) is connected to a first gear (73); and the electrode assembly (55) is connected to four first spur racks (75) that mesh with the corresponding first gears (73); The electrolytic cell (1) further comprises a stirring mechanism (8), the stirring mechanism (8) comprising a mounting plate (81), a stirring member (82), a second gear (83) and a second spur rack (84); four mounting plates (81) are connected to the outside of the mounting frame (51); stirring members (82) are rotatably connected between the mounting plates (81) adjacent to each other; the stirring members (82) are connected to the second gear (83); the left and right walls of the electrolytic cell (1) are connected to eight second spur racks (84); the second spur racks (84) are meshed with the adjacent second gears (83).

2. A lithium iron phosphate battery positive electrode material recovery device according to claim 1, characterized in that: The electrolytic cell (1) also includes a neutralization mechanism (9), which includes a feeding frame (91) and an acid-base detector (92). The right rear side of the electrolytic cell (1) is connected to the feeding frame (91), the inner rear wall of the electrolytic cell (1) is connected to the acid-base detector (92), and the acid-base detector (92) is connected and communicated with the feeding frame (91).

3. A lithium iron phosphate battery positive electrode material recovery device according to claim 2, characterized in that: The air blower also comprises a blower mechanism (10), the blower mechanism (10) comprising an air suction member (101), an air outlet frame (102) and a duct (103); the upper rear side of the cover plate (2) is connected to two symmetrical air suction members (101) on the left and right; the rear sides of the air suction members (101) are each connected to two ducts (103); and the air outlet frame (102) is connected between adjacent ducts (103) on the left and right.

4. A lithium iron phosphate battery positive electrode material recovery device according to claim 1, characterized in that: The electrolytic cell (1) is connected with ribs for strengthening and stabilizing.

5. A lithium iron phosphate battery positive electrode material recovery device according to claim 1, characterized in that: The electrode assembly (55) comprises an electrode sheet, a storage battery and a connecting wire. Two electrode sheets symmetrically arranged front and rear are slidably connected to the mounting frame (51). The upper front side of the electrolytic cell (1) is connected to the storage battery. The connecting wire is connected between the storage battery and the corresponding electrode sheet.

6. A lithium iron phosphate battery positive electrode material recovery device according to claim 1, characterized in that: The stirring member (82) is a cross-shaped fan blade structure.

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