A device for recycling and pretreating waste lithium ion batteries

Abstract

The utility model provides a kind of waste lithium ion battery recycling pretreatment device, it is related to lithium ion battery recycling technical field.A kind of waste lithium ion battery recycling pretreatment device, including immersion bucket, circulating barrel and circulating pump, the bottom surface of circulating barrel is higher than the top surface of immersion bucket setting, the immersion bucket and circulating barrel are connected by communicating pipe intercommunication.Through placing mechanism into battery, and make it immerse in electrolyte solution inside immersion bucket to discharge battery, under the action of circulating pump, water suction pipe, water delivery pipe, communicating pipe, solenoid valve and liquid level sensor, make the electrolyte solution inside circulating barrel and the electrolyte solution inside immersion bucket circulate flow, by filter screen to the solution that flows into the inside of circulating barrel is filtered, and by cooling medium inside cooling pipe to the solution that flows into the inside of circulating barrel is cooled, solve the problem of the influence discharge efficiency due to a large amount of heat generated in the process of discharging.

Description

Technical Field

[0001] This utility model relates to a pretreatment device, specifically a pretreatment device for recycling waste lithium-ion batteries, belonging to the field of lithium-ion battery recycling technology. Background Technology

[0002] Lithium-ion batteries are a commonly used power supply product. When lithium-ion batteries are scrapped and become waste lithium-ion batteries, they often need to be recycled in order to achieve energy recycling and reduce environmental pollution. In the process of recycling waste lithium-ion batteries, they must first be discharged, because if they are disassembled or cut while energized, they are very easy to catch fire or even explode.

[0003] Chinese Patent Publication No. CN209691896U discloses a lithium-ion battery recycling and discharging device for new energy vehicles, including a base plate, a discharge frame, and a storage mesh frame. The bottom of the discharge frame is fixedly connected to the top of the base plate through a connecting block. Vertical plates are fixedly connected to the top of the base plate and to both sides of the discharge frame. A first support plate is fixedly connected to the top of one side of the vertical plate. This utility model relates to the field of battery recycling technology.

[0004] However, the inventors of the above-mentioned device believe that there are certain defects. The device generates a lot of heat during the discharge of lithium-ion batteries, which raises the temperature of the electrolyte solution and slows down the discharge rate, thereby affecting the efficiency of lithium-ion battery recycling. Therefore, this utility model provides a pre-treatment device for recycling waste lithium-ion batteries. Utility Model Content

[0005] The purpose of this invention is to provide a pretreatment device for recycling waste lithium-ion batteries in order to solve the above-mentioned problems. This device addresses the issue that lithium-ion batteries generate a large amount of heat during discharge, which raises the temperature of the electrolyte solution and slows down the discharge rate, thus affecting the efficiency of lithium-ion battery recycling.

[0006] This utility model is achieved through the following technical solution: a pretreatment device for recycling waste lithium-ion batteries, comprising an immersion tank, a circulation tank, and a circulation pump. The bottom surface of the circulation tank is higher than the top surface of the immersion tank. The immersion tank and the circulation tank are connected by a connecting pipe. The input end of the circulation pump is connected to the immersion tank through a water pumping pipe, and the output end of the circulation pump is connected to the circulation tank through a water supply pipe. The immersion tank is equipped with a battery placement mechanism inside. A cooling pipe is fixedly connected inside the circulation tank. A fixing plate is fixedly connected inside the circulation tank, and a filter screen is embedded in the fixing plate. A solenoid valve is fixedly connected to the connecting pipe, and a liquid level sensor is fixedly connected inside the immersion tank.

[0007] Preferably, the placement mechanism includes a second lid detachably connected to the top of the immersion tank, a connecting rod fixedly connected to the bottom of the second lid, and a placement frame fixedly connected to the other end of the connecting rod. The battery is placed inside the placement frame, and the connecting rod is then closed to immerse the placement frame in the electrolyte solution.

[0008] Preferably, the placement frame is fixedly connected to multiple fixed partitions, and the immersion tank is fixedly connected to a drain pipe. By opening the drain pipe, the solution inside the immersion tank can be discharged. The multiple fixed partitions divide the inside of the second tank lid into multiple placement cavities.

[0009] Preferably, a rotating rod is rotatably connected inside the circulation tank, and a stirring blade is fixedly connected to the rotating rod. By driving the rotating rod to rotate, the stirring blade is driven to stir the solution inside the circulation tank, thereby improving the uniformity of solution cooling.

[0010] Preferably, an impeller is fixedly connected to the top of the rotating rod, and one end of the water supply pipe points to the impeller. When the water supply pipe injects liquid into the circulation tank, the water flow impacts the impeller to drive the rotating rod to rotate, thereby reducing the number of drive devices used.

[0011] Preferably, a scraper is fixedly connected to the rotating rod, and the bottom of the scraper is in contact with the filter screen. When the rotating rod rotates, the scraper scrapes away impurities on the filter screen to prevent impurities from clogging the filter screen.

[0012] Preferably, the cooling pipe is spiral-shaped, and the top of the circulation tank is detachably connected to a first tank cover. By opening the first tank cover, it is convenient to clean the impurities in the filter screen inside the circulation tank.

[0013] This utility model provides a pretreatment device for recycling waste lithium-ion batteries, which has the following beneficial effects:

[0014] 1. This device discharges the battery by placing it in the placement mechanism and immersing it in the electrolyte solution inside the immersion tank. Under the action of the circulation pump, water suction pipe, water delivery pipe, connecting pipe, solenoid valve and liquid level sensor, the electrolyte solution inside the circulation tank and the electrolyte solution inside the immersion tank are circulated. The solution flowing into the circulation tank is filtered through the filter screen, and the solution flowing into the circulation tank is cooled by the cooling medium inside the cooling pipe. This solves the problem of the large amount of heat generated during the discharge process affecting the discharge efficiency.

[0015] 2. This device places the batteries inside the placement frame and separates them with fixed partitions to prevent the batteries from piling up together and causing a large amount of current to be released at the same time, which could lead to dangerous situations. This makes the discharge process safer.

[0016] 3. The device uses stirring blades to agitate the solution inside the circulation tank as the rotating rod rotates, thus achieving uniform cooling. Attached Figure Description

[0017] Figure 1 This is a perspective view of the entire utility model;

[0018] Figure 2 This is a cross-sectional view of the immersion tank of this utility model;

[0019] Figure 3 This is a cross-sectional view of the circulation tank of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of point A.

[0021] [Explanation of Key Component Symbols]

[0022] 1. Immersion tank; 11. Drain pipe; 2. Circulation tank; 21. First tank cover; 3. Circulation pump; 31. Pumping pipe; 32. Water delivery pipe; 4. Connecting pipe; 41. Solenoid valve; 5. Second tank cover; 51. Connecting rod; 52. Placement frame; 53. Fixing partition; 6. Liquid level sensor; 7. Fixing plate; 71. Filter screen; 8. Cooling pipe; 9. Rotating rod; 91. Stirring blade; 92. Impeller; 93. Scraper. Detailed Implementation

[0023] This utility model provides a pretreatment device for recycling waste lithium-ion batteries.

[0024] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 A waste lithium-ion battery recycling pretreatment device includes an immersion tank 1, a circulation tank 2, and a circulation pump 3. The bottom surface of the circulation tank 2 is higher than the top surface of the immersion tank 1. The immersion tank 1 and the circulation tank 2 are connected by a connecting pipe 4. By setting the circulation tank 2 higher than the immersion tank 1, the solution inside the circulation tank 2 automatically flows into the immersion tank 1 through the connecting pipe 4 under the action of gravity. The input end of the circulation pump 3 is connected to the immersion tank 1 through a water pumping pipe 31, and the output end of the circulation pump 3 is connected to the circulation tank 2 through a water delivery pipe 32. By starting the circulation pump 3, the water pumping pipe 31 draws out the solution inside the immersion tank 1, and then the solution is transported to the inside of the circulation tank 2 through the water delivery pipe 32, forming a circulating flow of the solution.

[0025] Please refer to it again. Figure 1 and Figure 2The immersion tank 1 has a battery placement mechanism inside, which includes a second cover 5 detachably connected to the top of the immersion tank 1. A connecting rod 51 is fixedly connected to the bottom of the second cover 5, and a placement frame 52 is fixedly connected to the other end of the connecting rod 51. By placing the battery inside the placement frame 52 and then covering the top of the immersion tank 1 with the second cover 5, the placement frame 52 is immersed in the electrolyte solution to discharge the battery inside the placement frame 52. Multiple fixed partitions 53 are fixedly connected inside the placement frame 52 to separate the space inside the placement frame 52, preventing the batteries from piling up together during the discharge process and causing a large current to be released simultaneously, which could lead to a dangerous situation. This makes the discharge process safer. A drain pipe 11 is fixedly connected to the immersion tank 1, and a valve is fixedly connected to the drain pipe 11. Finally, by opening the valve on the drain pipe 11, the solution inside the immersion tank 1 can be discharged.

[0026] Please refer to it again. Figure 1 , Figure 3 and Figure 4 The circulation tank 2 is fixedly connected to a cooling pipe 8, which is spiral in shape. The top of the circulation tank 2 is detachably connected to a first tank cover 21. The inlet and outlet of the cooling pipe 8 are both located on the outer surface of the circulation tank 2. Cooling medium, such as cold water, is injected into the interior of the cooling pipe 8 through the inlet. The cooling pipe 8 cools the solution flowing into the circulation tank 2. The top of the circulation tank 2 can be opened by opening the first tank cover 21 to perform maintenance operations inside the circulation tank 2. The spiral cooling pipe 8 improves the cooling effect on the solution.

[0027] Please refer to it again. Figure 1 , Figure 3 and Figure 4 Inside the circulation tank 2, a rotating rod 9 is rotatably connected, and a stirring blade 91 is fixedly connected to the rotating rod 9. By driving the rotating rod 9 to rotate, the stirring blade 91 stirs the solution inside the circulation tank 2, so that the solution inside the circulation tank 2 is cooled evenly. An impeller 92 is fixedly connected to the top of the rotating rod 9, and one end of the water supply pipe 32 points to the impeller 92. When the solution inside the immersion tank 1 is transported to the inside of the circulation tank 2 through the water supply pipe 32, the water flow drives the rotating rod 9 to rotate by impacting the impeller 92, reducing the use of drive equipment and saving operating costs.

[0028] Please refer to it again. Figure 1 , Figure 3 and Figure 4A fixed plate 7 is fixedly connected inside the circulation tank 2. A filter screen 71 is embedded in the fixed plate 7. The filter screen 71 filters the solution flowing into the circulation tank 2, removing impurities from the electrolyte solution and preventing impurities from flowing back into the immersion tank 1 during circulation. A scraper 93 is fixedly connected to the rotating rod 9. The bottom of the scraper 93 is in contact with the filter screen 71. During the rotation of the rotating rod 9, the scraper 93 scrapes the surface of the filter screen 71 to prevent impurities from clogging the filter screen 71 and affecting the flow of the solution.

[0029] Please refer to it again. Figure 1 and Figure 2 A solenoid valve 41 is fixedly connected to the connecting pipe 4, and a liquid level sensor 6 is fixedly connected inside the immersion tank 1. Both the liquid level sensor 6 and the solenoid valve 41 are electrically connected to external control equipment. The liquid level sensor 6 monitors the amount of solution inside the immersion tank 1, and the solenoid valve 41 controls the normal flow of the connecting pipe 4. When the amount of solution inside the immersion tank 1 is lower than a certain value, the control equipment controls the solenoid valve 41 to open so that the solution inside the connecting pipe 4 flows into the immersion tank 1 to replenish it.

[0030] Working principle: The immersion tank 1, circulation tank 2, and circulation pump 3 are installed in suitable locations and connected to a municipal power supply. Electrolyte solution is filled into the circulation tank 2 and immersion tank 1, and cooling medium is filled into the cooling pipe 8. The batteries to be processed are then placed inside the placement frame 52 and separated from each other by a fixed partition 53. The second lid 5 is then placed on top of the immersion tank 1, immersing the placement frame 52 in the electrolyte solution inside the immersion tank 1 for discharge. After a period of time, the circulation pump 3 is activated, causing the water suction pipe 31 to extract the electrolyte solution from the immersion tank 1. The solution is then transferred to the water delivery pipe 32. The solution is injected into the circulation tank 2 under the action of the solenoid valve 41 on the connecting pipe 4. The solution inside the circulation tank 2 flows into the immersion tank 1 under the action of the connecting pipe 4, thereby circulating the electrolyte solution inside the circulation tank 2 and the immersion tank 1. The electrolyte solution flowing into the circulation tank 2 is cooled by the cooling pipe 8, filtered and impurities are removed by the filter screen 71, and the water jet sprayed by the water supply pipe 32 impacts the impeller 92, thereby driving the rotating rod 9 to rotate. The stirring blade 91 stirs the solution inside the circulation tank 2, so that the solution is cooled evenly.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for recycling waste lithium-ion batteries, comprising an immersion tank (1), a circulation tank (2), and a circulation pump (3), characterized in that: The bottom surface of the circulation tank (2) is higher than the top surface of the immersion tank (1). The immersion tank (1) and the circulation tank (2) are connected by a connecting pipe (4). The input end of the circulation pump (3) is connected to the immersion tank (1) through a water pumping pipe (31). The output end of the circulation pump (3) is connected to the circulation tank (2) through a water supply pipe (32). The immersion tank (1) is equipped with a battery placement mechanism inside. The circulation tank (2) is fixedly connected with a cooling pipe (8). The circulation tank (2) is fixedly connected with a fixing plate (7). A filter screen (71) is embedded on the fixing plate (7). A solenoid valve (41) is fixedly connected to the connecting pipe (4). A liquid level sensor (6) is fixedly connected to the immersion tank (1).

2. The waste lithium-ion battery recycling pretreatment device according to claim 1, characterized in that: The placement mechanism includes a second bucket cover (5) detachably connected to the top of the immersion bucket (1), a connecting rod (51) fixedly connected to the bottom of the second bucket cover (5), and a placement frame (52) fixedly connected to the other end of the connecting rod (51).

3. The waste lithium-ion battery recycling pretreatment device according to claim 2, characterized in that: The placement frame (52) is fixedly connected to a plurality of fixed partitions (53), and the immersion tank (1) is fixedly connected to a drain pipe (11).

4. The waste lithium-ion battery recycling pretreatment device according to claim 1, characterized in that: The circulation tank (2) is rotatably connected to a rotating rod (9), and a stirring blade (91) is fixedly connected to the rotating rod (9).

5. The waste lithium-ion battery recycling pretreatment device according to claim 4, characterized in that: An impeller (92) is fixedly connected to the top of the rotating rod (9), and one end of the water supply pipe (32) points to the impeller (92).

6. The waste lithium-ion battery recycling pretreatment device according to claim 4, characterized in that: A scraper (93) is fixedly connected to the rotating rod (9), and the bottom of the scraper (93) is in contact with the filter screen (71).

7. The waste lithium-ion battery recycling pretreatment device according to claim 1, characterized in that: The cooling pipe (8) is spiral-shaped, and the top of the circulation tank (2) is detachably connected to a first tank cover (21).

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