Waste lithium ion battery discharging equipment

Abstract

The utility model provides waste lithium ion battery discharging equipment, which belongs to the technical field of waste lithium battery treatment and comprises a plurality of treatment pools, a circulating pool, a heat exchanger and a salt supplementing device. The plurality of treatment ponds are connected in series through pipelines; the circulating pool is connected with the head and tail treatment pools through pipelines; a power piece is arranged on the circulating pool; the heat exchanger is arranged in the circulating pool; the heat exchanger is communicated with a cold source; the salt supplementing device comprises a salt storage box and a detection structure; wherein a discharging pipeline is arranged at the bottom of the salt storage box, and a valve is arranged on the discharging pipeline; the detection structure comprises a salinity meter, and the salinity meter can detect the salinity of the sodium chloride solution in the circulating pool; by means of the arrangement, the salinity in the electrolyte solution can be maintained within a certain range, heat exchange is conducted on the electrolyte solution through the heat exchanger, and the temperature of the electrolyte solution in the electrolysis process can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste lithium battery treatment, and in particular relates to a waste lithium ion battery discharge device. Background Art

[0002] Waste power batteries have high voltage and need to be fully discharged before recycling. Currently, there are two methods for safely discharging waste lithium-ion batteries. One is physical discharge, which consumes energy through an external load. However, this method is only applicable in the laboratory and cannot be used for large-scale discharge. The other is chemical discharge, which involves placing the waste lithium-ion battery in a sodium chloride solution to consume the energy in the battery through electrolysis.

[0003] The above electrolysis process is an exothermic process, which will increase the temperature of the sodium chloride solution and easily accelerate the volatilization of water in the sodium chloride solution. Utility Model Content

[0004] The embodiment of the utility model provides a waste lithium-ion battery discharge device, which aims to solve the technical problem in the prior art that the electrolysis process easily accelerates the volatilization of water in the sodium chloride solution.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] Provided is a waste lithium-ion battery discharge device, comprising:

[0007] A plurality of treatment tanks are connected in series through pipelines; each treatment tank is provided with an electrolyte solution, and each treatment tank is used to soak waste lithium-ion batteries;

[0008] A circulation pool connected to the first and last treatment pools via a pipeline; the circulation pool is provided with a power member for transporting the electrolyte solution in the circulation pool to the treatment pool;

[0009] A heat exchanger is disposed in the circulation pool; the heat exchanger is connected to a cold source so that the refrigerant circulates in the heat exchanger;

[0010] The salt replenishing device includes a salt storage box arranged on the circulation pool and a detection structure for detecting the salinity of the electrolyte solution; wherein, the bottom of the salt storage box has a discharge pipe, and the discharge pipe has a valve; when the salinity in the electrolyte is lower than a preset value, the valve is in an open state to add salt to the circulation pool.

[0011] In one possible implementation, an exhaust pipe is provided near the top of each treatment tank, and the exhaust pipe has a connecting pipe for passing through the side wall of the treatment tank, and the connecting pipe is used to communicate with the exhaust gas treatment equipment; the exhaust pipe is provided with a plurality of air intakes toward the inside of the treatment tank for absorbing the exhaust gas generated by electrolysis;

[0012] A cover is provided on the top of each of the treatment tanks, one side of the cover is hinged to one side of the treatment tank, and a driving structure for opening the cover is provided on the treatment tank.

[0013] In a possible implementation, the driving structure includes:

[0014] A connecting portion connected to a side of the treatment tank hinged to the cover plate; a top of the connecting portion extending upward and exceeding the height of the cover plate;

[0015] a connecting ring connected to the top of the connecting portion;

[0016] A reel is rotatably mounted on the side of the treatment tank via a support; a reel is wound around the reel, one end of the reel is connected to the reel; and the other end of the reel is connected to a position of the cover plate away from the hinged side.

[0017] A power piece is connected to the outer side wall of the treatment tank; a driving end of the power piece is connected to the reel.

[0018] In a possible implementation, the top of the treatment tank has an annular groove, and an annular sealing ring is provided in the annular groove; the cover plate is used to press the annular sealing ring to ensure a sealing fit between the cover plate and the treatment tank.

[0019] In a possible implementation, the cover plate is provided with a plurality of one-way valves, and the airflow direction of each one-way valve is from the outside to the inside of the treatment pool to balance the air pressure in the treatment pool.

[0020] In one possible implementation, one end of the circulation pool has a drainage box, the length direction of the drainage box is arranged along the width direction of the circulation pool, and the drainage box is connected to a plurality of drainage pipes, each of which is provided with a drainage pump, and the drainage pump is connected to the wastewater treatment equipment;

[0021] A liquid outlet is provided at the connection between the drainage box and the circulation pool, and an opening and closing structure for opening or closing the liquid outlet is provided on the drainage box.

[0022] In a possible implementation, the circulation pool is provided with a slide rail at the liquid outlet, and the opening and closing structure includes:

[0023] A slide plate is located at the position of the liquid outlet and is slidably engaged with the slide rail;

[0024] A baffle, one end of which is hinged on the slide; when the slide slides upward into position, the baffle rotates to the top of the treatment pool and contacts the top of the treatment pool to limit the position of the slide.

[0025] In one possible implementation, the discharge pipe has an opening above the valve, a discharge plate is slidably provided at the opening position, and a driving member for driving the discharge plate to slide is provided on the discharge pipe; a material replenishment area is formed between the discharge plate and the valve.

[0026] In a possible implementation, the heat exchanger is arranged along the length direction of the circulation pool, and a plurality of heat pipes are provided on the outer peripheral wall of the heat exchanger, and the heat pipes are located in the electrolyte solution.

[0027] In a possible implementation, each of the treatment pools is provided with a cage with a hanging ring on the top; the cage is used to hold waste lithium-ion batteries.

[0028] The present invention provides a waste lithium-ion battery discharge device. Compared with the prior art, after the waste lithium-ion battery is hoisted into the treatment pool, it can consume the residual power in the waste lithium-ion battery and reduce the voltage of the waste lithium-ion battery to within a safe range. During the electrolysis process, under the action of the power parts in the circulation pool, the electrolyte solution in several treatment pools can be in a circulating state, and the electrolyte solution is cooled by the heat exchanger, so that the electrolyte solution in the treatment pool is within a preset temperature range, reducing the situation where the temperature in the treatment pool is too high and the water volatilization in the electrolyte solution is accelerated. After the preset electrolysis time, the salinity in the electrolyte solution is detected by the detection structure. When the salinity is lower than the preset value, the valve is opened, and the salt in the salt storage box falls into the circulation pool through the discharge pipe to complete the salt replenishment operation. After the salt replenishment is completed, the valve is closed. Through the above-mentioned setting of the present application, the salinity in the electrolyte solution can be maintained within a certain range, and the electrolyte solution is exchanged with heat by the heat exchanger, which can reduce the temperature of the electrolyte solution during the electrolysis process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A top view of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model;

[0030] Figure 2 A schematic diagram of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model;

[0031] Figure 3 for Figure 2A magnified schematic diagram of part A in the middle;

[0032] Figure 4 A schematic diagram of the opening and closing structure of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model;

[0033] Figure 5 for Figure 4 A magnified schematic diagram of part B in the middle;

[0034] Figure 6 A schematic diagram of a baffle portion of a waste lithium-ion battery discharge device provided by an embodiment of the present utility model;

[0035] Figure 7 A schematic diagram of a mesh box portion of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model;

[0036] Figure 8 A schematic diagram of a salt storage tank portion of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model;

[0037] Figure 9 for Figure 8 Enlarged schematic diagram of the middle C part;

[0038] Figure 10 A schematic diagram of a waiting area for replenishment of a waste lithium-ion battery discharge device provided in an embodiment of the present utility model.

[0039] Explanation of the accompanying symbols: 1. Treatment tank; 2. Circulation tank; 21. Liquid outlet; 3. Salt replenishing device; 31. Salt storage box; 32. Discharge pipe; 33. Discharge plate; 34. Area to be replenished; 4. Exhaust pipe; 41. Connecting pipe; 411. Air intake; 5. Cover plate; 6. Drive structure; 61. Connecting part; 62. Connecting ring; 63. Winding rope; 7. Drainage box; 71. Drainage pipe; 8. Opening and closing structure; 81. Slide plate; 82. Baffle; 83. L-shaped plate; 9. Net cage; 91. Lifting ring. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] Please also refer to Figures 1 to 10The present invention provides a waste lithium-ion battery discharge device. The waste lithium-ion battery discharge device comprises a plurality of treatment pools 1, a circulation pool 2, a heat exchanger, and a salt replenishing device 3. The plurality of treatment pools 1 are connected in series via a pipeline. Each treatment pool 1 is provided with an electrolyte solution, and each treatment pool 1 is used to soak waste lithium-ion batteries. The circulation pool 2 is connected to the first and last treatment pools 1 via a pipeline. The circulation pool 2 is provided with a power component, which is used to transport the electrolyte solution in the circulation pool 2 to the treatment pool 1. A heat exchanger is provided in the circulation pool 2. The heat exchanger is connected to a cold source so that the refrigerant circulates in the heat exchanger. The salt replenishment device 3 includes a salt storage tank 31 disposed on the circulation pool 2 and a detection structure for detecting the salinity of the electrolyte solution. The salt storage tank 31 has a discharge pipe 32 at its bottom, which is provided with a valve. When the salinity of the electrolyte is lower than a preset value, the valve is opened to allow salt to be added to the circulation pool 2. The detection structure includes a salinometer capable of detecting the salinity of the sodium chloride solution in the circulation pool 2. The salinity of the electrolyte is detected daily, and when the salinity is lower than a preset value, the valve is opened to allow the salt in the salt storage tank 31 to enter the circulation pool 2. The heat exchanger is connected to a cooling tower within the factory. The refrigerant in the cooling tower circulates through the heat exchanger, cooling the electrolyte solution in the circulation pool 2. The power component includes a water pump, which is outside the circulation pool 2 and connected to the pipe connecting the circulation pool 2 and the treatment pool 1; after starting the water pump, the electrolyte solution in the circulation pool 2 can enter the first treatment pool 1, and after the electrolyte solution flows in several treatment pools 1, it flows back to the circulation pool 2 from the last treatment pool 1; after the above process, the electrolyte solution can circulate through several treatment pools 1.

[0042] The present invention provides a waste lithium-ion battery discharge device. Compared with the prior art, after the waste lithium-ion battery is hoisted into the treatment tank 1, it can consume the residual power in the waste lithium-ion battery and reduce the voltage of the waste lithium-ion battery to within a safe range. During the electrolysis process, under the action of the power parts in the circulation tank 2, the electrolyte solution in several treatment tanks 1 can be in a circulating state, and the electrolyte solution is cooled by the heat exchanger, so that the electrolyte solution in the treatment tank 1 is within a preset temperature range, reducing the situation where the temperature in the treatment tank 1 is too high and accelerates the volatilization of water in the electrolyte solution. After the preset electrolysis time, the salinity in the electrolyte solution is detected by the detection structure. When the salinity is lower than the preset value, the valve is opened, and the salt in the salt storage box 31 falls into the circulation tank 2 through the discharge pipe 32, completing the salt replenishment operation. After the salt replenishment is completed, the valve is closed. Through the above-mentioned setting of the present application, the salinity in the electrolyte solution can be maintained within a certain range, and the electrolyte solution is heat-exchanged by the heat exchanger, which can reduce the temperature of the electrolyte solution during the electrolysis process.

[0043] In some embodiments, as Figures 1 to 10 As shown, each treatment tank 1 is provided with an exhaust duct 4 near the top. The exhaust duct 4 has a connecting duct 41 for passing through the sidewall of the treatment tank 1 and communicating with the exhaust gas treatment equipment. The exhaust duct 4 is provided with several air intakes 411 facing the inside of the treatment tank 1 to absorb the exhaust gas generated by electrolysis. Each treatment tank 1 is topped with a cover 5, one side of which is hinged to the side of the treatment tank 1. The treatment tank 1 has a drive structure 6 for opening the cover 5. The exhaust gas treatment equipment is provided with an induced draft fan that acts as a suction fan, thereby drawing the exhaust gas generated by the treatment tank 1 into the exhaust gas treatment equipment.

[0044] It should be noted that before placing the waste lithium-ion batteries into the treatment pool 1, the cover 5 is first opened and the induced draft fan is started, and then the waste lithium-ion batteries are placed into the treatment pool 1 and the cover 5 is closed; through the above arrangement, after the waste lithium-ion batteries are placed into the treatment pool 1, the treatment pool 1 will generate waste gas, which can be discharged into the waste gas treatment equipment through the exhaust pipe 4, thereby reducing the waste gas escaping into the air.

[0045] For example, after the waste lithium-ion battery is discharged, the voltage of the waste lithium-ion battery can be less than 1.5V; after the waste lithium-ion battery is taken out from the treatment pool 1, it is placed on a vibration dehydrator to remove the moisture from the waste lithium-ion battery; the vibration dehydrator is a prior art and will not be described in detail here.

[0046] In some embodiments, as Figures 1 to 10 As shown, the driving structure 6 includes a connecting part 61, a connecting ring 62, a winding shaft and a power member; the connecting part 61 is connected to the side of the treatment tank 1 hinged to the cover 5; the top of the connecting part 61 extends upward and exceeds the height of the cover 5; the connecting ring 62 is connected to the top of the connecting part 61; the winding shaft is rotatably arranged on the side of the treatment tank 1 through a support; a winding rope 63 is wound around the winding shaft, and one end of the winding rope 63 is connected to the winding shaft; the other end of the winding rope 63 is connected to a position of the cover 5 away from the hinged side; the power member is connected to the outer wall of the treatment tank 1; the driving end of the power member is connected to the winding shaft.

[0047] It should be noted that the power member can be a drive motor, which is fixed to the side of the treatment tank 1; when it is necessary to open the cover 5, the drive motor drives the reel to rotate, so that the reel rope 63 is wound around the reel, and the cover 5 rotates around the hinge position under the pull of the reel rope 63, and finally opens the top of the treatment tank 1. When the cover 5 is opened to the full extent, the connection portion 61 can contact the cover 5, limiting the position of the cover 5; when closing the cover 5, the drive motor drives the reel in the reverse direction, and the reel rope 63 can be unwound from the reel rope 63. When the operator rotates the cover 5 in the reverse direction to an acute angle position, the cover 5 has a tendency to move downward under the action of its own gravity. By lowering the cover 5 through the reel rope 63, the purpose of the cover 5 closing the top of the treatment tank 1 can be achieved.

[0048] In some embodiments, as Figures 1 to 10 As shown, the top of the treatment tank 1 has an annular groove, and an annular sealing ring is provided in the annular groove; the cover plate 5 is used to press the annular sealing ring to make the cover plate 5 and the treatment tank 1 sealed.

[0049] It should be noted that, by providing a sealing ring between the cover plate 5 and the treatment tank 1 , when the cover plate 5 is covered on the treatment tank 1 , the sealing between the cover plate 5 and the treatment tank 1 can be improved.

[0050] In some embodiments, as Figures 1 to 10 As shown, the cover plate 5 is provided with a plurality of one-way valves, and the airflow direction of each one-way valve is from the outside to the inside of the treatment tank 1 to balance the air pressure in the treatment tank 1 .

[0051] It should be noted that by setting a one-way valve on the cover plate 5, when negative pressure occurs in the treatment pool 1, external gas can enter the treatment pool 1 to balance the air pressure in the treatment pool 1; after setting the one-way valve, the exhaust gas generated in the treatment pool 1 can be prevented from escaping into the air.

[0052] In some embodiments, as Figures 1 to 10 As shown, one end of the circulation pool 2 is provided with a drainage box 7, the length direction of the drainage box 7 is arranged along the width direction of the circulation pool 2, and a number of drainage pipes 71 are connected to the drainage box 7, each drainage pipe 71 is provided with a drainage pump, and the drainage pump is connected to the wastewater treatment equipment; the connection between the drainage box 7 and the circulation pool 2 is provided with a liquid outlet 21, and the drainage box 7 has an opening and closing structure 8 for opening or closing the liquid outlet 21.

[0053] It should be noted that after the waste lithium-ion battery is discharged, the liquid outlet 21 is opened, allowing the electrolyte solution in the circulation pool 2 to flow into the drainage box 7 and finally discharged into the wastewater treatment equipment through a plurality of drainage pumps. Through the above arrangement, the efficiency of wastewater discharge can be improved.

[0054] In some embodiments, as Figures 1 to 10 As shown, the circulation pool 2 is provided with a slide rail at the position of the liquid outlet 21, and the opening and closing structure 8 includes a slide plate 81 and a baffle 82; the slide plate 81 is located at the position of the liquid outlet 21 and slides with the slide rail; one end of the baffle 82 is hinged to the slide plate 81; when the slide plate 81 slides upward into position, the baffle 82 rotates to the position of the top of the treatment pool 1 and contacts the top of the treatment pool 1 to limit the position of the slide plate 81.

[0055] It should be noted that the slide rail includes two L-shaped plates 83, and a slideway is formed between the two L-shaped plates 83, and the slide plate 81 slides in cooperation with the slideway; after the slide plate 81 is pulled upward, the slide plate 81 can open the liquid port 21; when the baffle 82 is located at the top position of the treatment tank 1, the baffle 82 is rotated outward and made to contact the top of the treatment tank 1, at this time the slide plate 81 can be fixed in the position after sliding.

[0056] In some embodiments, as Figures 1 to 10 As shown, the discharge pipe 32 has an opening above the valve, and a discharge plate 33 is slidably provided at the opening position. A driving member for driving the discharge plate 33 to slide is provided on the discharge pipe 32; a material replenishment area 34 is formed between the discharge plate 33 and the valve.

[0057] It should be noted that when the discharge plate 33 slides out of the discharge pipe 32, the valve is closed, and the salt can fall into the feeding area; then the discharge plate 33 is slid into the top position of the closed feeding area of ​​the discharge pipe 32, and the valve is opened, so that the salt in the feeding area can fall downward into the circulation pool 2. With the above arrangement, the circulation pool 2 can be replenished with salt in a quantitative manner.

[0058] In some embodiments, as Figures 1 to 10 As shown, the heat exchanger is arranged along the length of the circulation pool 2, and a plurality of heat pipes are arranged on the outer wall of the heat exchanger, and the heat pipes are located in the electrolyte solution. The heat pipes are prior art and will not be described in detail here.

[0059] It should be noted that, by providing a heat pipe on the heat exchanger, the heat exchange efficiency between the heat exchanger and the electrolyte solution can be improved, thereby facilitating cooling of the electrolyte solution.

[0060] In some embodiments, as Figures 1 to 10 As shown, each treatment pool 1 is provided with a net box 9 with a hanging ring 91 on the top; the net box 9 is used to hold waste lithium-ion batteries.

[0061] It should be noted that the waste lithium-ion batteries are placed in the net box 9, and then the net box 9 is connected to the lifting ring 91 on the net box 9 through the lifting equipment, so that the net box 9 can be lifted into the treatment tank 1; after the electrolysis starts, the lifting equipment is separated from the net box 9; after the electrolysis is completed, the lifting equipment is reconnected to the lifting ring 91 on the net box 9 to lift the net box 9 out of the treatment tank 1.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waste lithium-ion battery discharge device, characterized in that: include: A plurality of treatment pools are arranged in series through pipelines; each of the treatment pools is provided with an electrolyte solution, and each of the treatment pools is used to soak waste lithium-ion batteries; A circulation pool connected to the first and last treatment pools through pipelines; the circulation pool is provided with a power member, and the power member is used to transport the electrolyte solution in the circulation pool to the treatment pool; A heat exchanger is disposed in the circulation pool; the heat exchanger is connected to a cold source so that the refrigerant circulates in the heat exchanger; The salt replenishing device comprises a salt storage box arranged on the circulation pool and a detection structure for detecting the salinity in the electrolyte solution; wherein, the bottom of the salt storage box is provided with a discharge pipe, and the discharge pipe is provided with a valve; when the salinity in the electrolyte is lower than a preset value, the valve is in an open state to add salt into the circulation pool.

2. A waste lithium-ion battery discharge device as claimed in claim 1, characterized in that: Each of the treatment pools is provided with an exhaust pipe near the top, the exhaust pipe has a connecting pipe for passing through the side wall of the treatment pool, and the connecting pipe is used to communicate with the waste gas treatment equipment; the exhaust pipe is provided with a plurality of air intakes toward the inside of the treatment pool for absorbing the waste gas generated by electrolysis; A cover plate is provided on the top of each of the treatment tanks, one side of the cover plate is hinged to one side of the treatment tank, and a driving structure for opening the cover plate is provided on the treatment tank.

3. A waste lithium-ion battery discharge device as claimed in claim 2, characterized in that: The driving structure comprises: A connecting portion connected to one side of the treatment tank hinged to the cover plate; the top of the connecting portion extends upward and exceeds the height of the cover plate; A connecting ring connected to the top of the connecting portion; A reel is rotatably arranged on the side of the treatment tank through a support; a reel is wound around the reel, one end of the reel is connected to the reel; the other end of the reel is connected to a position of the cover plate away from the hinged side; A power piece is connected to the outer side wall of the treatment pool; a driving end of the power piece is connected to the winding shaft.

4. A waste lithium-ion battery discharge device as claimed in claim 2, characterized in that: The top of the treatment pool is provided with an annular groove, and an annular sealing ring is arranged in the annular groove; the cover plate is used to press the annular sealing ring so that the cover plate and the treatment pool are sealed and matched.

5. A waste lithium-ion battery discharge device as claimed in claim 2, characterized in that: The cover plate is provided with a plurality of one-way valves, and the airflow direction of each of the one-way valves flows from the outside to the inside of the treatment pool to balance the air pressure in the treatment pool.

6. A waste lithium-ion battery discharge device as claimed in claim 1, characterized in that: One end of the circulation pool is provided with a drainage box, the length direction of which is arranged along the width direction of the circulation pool, and the drainage box is connected to a plurality of drainage pipes, each of which is provided with a drainage pump, and the drainage pump is connected to the wastewater treatment equipment; A liquid outlet is provided at the connection between the drainage box and the circulation pool, and an opening and closing structure for opening or closing the liquid outlet is provided on the drainage box.

7. A waste lithium-ion battery discharge device as claimed in claim 6, characterized in that: The circulation pool is provided with a slide rail at the position of the liquid outlet, and the opening and closing structure comprises: A slide plate, located at the position of the liquid outlet and slidably matched with the slide rail; A baffle, one end of which is hinged on the slide; when the slide slides upward to its position, the baffle rotates to the top of the treatment pool and contacts the top of the treatment pool to limit the position of the slide.

8. A waste lithium-ion battery discharge device as claimed in claim 1, characterized in that: The discharge pipe has an opening above the valve, a discharge plate is slidably provided at the opening position, and a driving member for driving the discharge plate to slide is provided on the discharge pipe; a material replenishment area is formed between the discharge plate and the valve.

9. A waste lithium-ion battery discharge device as claimed in claim 1, characterized in that: The heat exchanger is arranged along the length direction of the circulation pool. A plurality of heat pipes are arranged on the outer peripheral wall of the heat exchanger. The heat pipes are located in the electrolyte solution.

10. A waste lithium-ion battery discharge device as claimed in claim 1, characterized in that: Each of the treatment pools is provided with a net box with a hanging ring on the top; the net box is used to hold waste lithium-ion batteries.

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