Discharging device and method for recycling waste lithium battery

Abstract

The invention discloses a discharging device and method for waste lithium battery recycling, the device comprises a placing module, the placing module comprises a plurality of bearing cylinders which are synchronously and intermittently arranged in a rotating mode, a plurality of moving channels are arranged in the bearing cylinders in the circumferential direction, and bearing assemblies with floating blocks are arranged in the moving channels; reciprocating driving mechanisms are arranged on the two sides of the bearing assembly correspondingly, and limiting blocks used for limiting the bearing assembly, detection modules and control modules are arranged at the output ends of the reciprocating driving mechanisms. A waste lithium battery is inverted through intermittent circumferential rotation of a bearing cylinder and is discharged through treatment liquid, and after a control module judges that data obtained by a detection module is consistent, a limiting block breaks limitation on a bearing assembly, so that a floating block drives the battery to rapidly move upwards under the action of buoyancy; therefore, the waste lithium battery discharged at any time can be immediately taken away from the treating fluid, the corrosion to the battery electrode is avoided, and the material waste is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery recycling, and in particular relates to a discharge device for recycling waste lithium batteries, and a discharge method for the discharge device for recycling waste lithium batteries. Background Art

[0002] Lithium batteries are batteries based on lithium metal or lithium compounds. Due to their high energy density, long service life and light weight, they are widely used in various consumer electronic devices, energy storage systems, electric vehicles and other fields. With repeated charging and discharging, the service life of lithium batteries is gradually exhausted. However, there are still many reusable materials in waste lithium batteries. Recycling lithium batteries can not only improve economic benefits, but also reduce environmental pollution caused by lithium batteries and improve environmental benefits.

[0003] The first step after recycling lithium batteries is to discharge them. The current mainstream discharge method is to use a treatment solution to immerse the lithium battery in the discharge process. However, when the existing technology uses this method to operate the discharge process of lithium batteries, the remaining power of the battery is different, and the discharge time is different, so the battery cannot be removed in time. If the battery is in the treatment solution for too long after the discharge is completed, it will corrode the battery electrodes, resulting in material waste and affecting the recycling value. Summary of the invention

[0004] The present invention aims to solve the problem in the prior art that the battery after discharge is in the treatment solution for too long, which will corrode the battery electrodes, resulting in material waste and affecting the recycling value. The present invention proposes the following technical solution:

[0005] Discharge device for recycling waste lithium batteries, including:

[0006] A placement module, the placement module comprises a plurality of bearing cylinders arranged to rotate synchronously and intermittently, a connecting cylinder is arranged in the middle of the bearing cylinder, a plurality of moving channels are arranged circumferentially inside the bearing cylinder, a bearing assembly with a floating block is arranged in the moving channel, the bearing assembly reciprocates in the direction of the moving channel, a reciprocating driving mechanism is arranged on both sides of the bearing assembly, and a limit block for limiting the bearing assembly is arranged at the output end of the reciprocating driving mechanism;

[0007] A detection module, the detection module includes a power detection device, the power detection device is used to detect the remaining power of the battery, the power detection device is connected to two connecting posts through a line, and the connecting posts are located in the bearing assembly and are used to connect to the battery electrodes;

[0008] A control module is provided in the control module for receiving the information collected by the detection module and making judgments. The control module is provided with battery safety power data. After receiving the data from the detection module, the control module judges whether the detection data is within a normal data interval. When the detection data is within the normal data interval, an electrical signal is provided to the reciprocating drive mechanism to control the limit block to disconnect the restriction on the bearing assembly, and the battery that has completed discharge at the bottom is quickly taken away from the treatment liquid by the floating block.

[0009] As a preferred embodiment of the above technical solution, the bearing assembly includes a movable plug plate movably inserted in the movable channel, mounting frames fixedly connected to the floating block are arranged on both sides of the movable plug plate, the limit block is movably inserted in the mounting frame, a shrinkage block is movably inserted in the mounting frame, the connecting column is arranged on the shrinkage block, and the shrinkage block and the mounting frame are fixedly connected by a spring.

[0010] As a preferred embodiment of the above technical solution, it also includes: a reaction box, the placement module is located in the reaction box, the treatment liquid inside the reaction box is lower than the position of the connecting tube, the reaction box is provided with a sealing part at the top of the placement module, and the top of the reaction box is provided with a plurality of discharge ports at the sealing part position.

[0011] As a preferred embodiment of the above technical solution, two adjacent connecting tubes are fixedly connected, one of the connecting tubes is rotatably plugged into the side wall of the reaction box, and the connecting tube is connected to an external power device.

[0012] As a preferred embodiment of the above technical solution, a blocking plate is arranged inside the carrying tube, and the blocking plate is used to block the tilted and inverted carrying component. A reset member is arranged in the middle of the blocking plate, and the reset member is used to reset the carrying component. The reset member includes an obliquely arranged pushing cylinder and an ejection block, and the pushing cylinder is connected to the line control module.

[0013] As a preferred embodiment of the above technical solution, two adjacent baffles are fixedly connected, and one of the baffles is fixedly connected to the inner wall of the reaction box.

[0014] As a preferred embodiment of the above technical solution, an exhaust pipe for discharging waste gas is arranged on the top of the reaction box, and a liquid inlet pipe for injecting treatment liquid and a liquid outlet pipe for discharging treatment liquid are respectively arranged on both sides of the bottom of the reaction box.

[0015] As a preferred embodiment of the above technical solution, a sealing cylinder is provided at the front end of the reaction box, the sealing cylinder is used to seal the connecting cylinder, and a removal device for removing the battery is provided inside the sealing cylinder.

[0016] The discharge method of the discharge device for recycling waste lithium batteries comprises the following steps:

[0017] S1. Place used batteries;

[0018] During the pause of the carrier cylinder, the used battery is placed on the carrier assembly, and the used battery is then connected to the connecting column. Then the carrier cylinder continues to rotate so that the used battery is gradually inverted and enters the treatment liquid.

[0019] S2, battery discharge processing;

[0020] After the battery electrodes are all in the treatment solution, the discharge process begins. The power detection device monitors the remaining power of the battery in real time through the connection column and the battery and sends the data to the control module;

[0021] S3, determining whether to release the battery;

[0022] During the process of the battery entering the treatment solution and leaving, the control module receives the detection data and judges that if the data is not in the normal data interval, it enters step S4, and if the data is in the normal data interval, it enters step S5;

[0023] S4, repeated discharge treatment;

[0024] As the carrier tube rotates, the battery passes through the material taking position and the material discharging position. The two positions do not perform material taking and discharging operations, and enter step S2;

[0025] S5, release the battery;

[0026] The control module provides an electrical signal to the reciprocating drive mechanism to control the relative contraction of the limit block to disconnect the restriction on the bearing assembly. Under the action of buoyancy, the floating block drives the bearing assembly and the battery to move up quickly, away from the treatment liquid and into the connecting tube;

[0027] S6. Remove the battery;

[0028] The battery stops moving after the carrying cylinder enters the material taking position, and then the battery is removed from the connecting cylinder position and the carrying assembly is pushed back and restricted by the limit block again. The carrying cylinder continues to rotate to the material discharging position and stops rotating to wait for the material discharging work.

[0029] The beneficial effects of the present invention are:

[0030] 1. The intermittent circumferential rotation of the bearing cylinder is used to invert the waste lithium battery and pass through the treatment liquid for discharge treatment. After the control module determines that the data obtained by the detection module is consistent, the limit block disconnects the restriction on the bearing component so that the floating block drives the battery to move up quickly under the action of buoyancy, thereby immediately taking the waste lithium battery that has been discharged at any time away from the treatment liquid to avoid corrosion to the battery electrodes, reduce material waste and avoid affecting the recycling value;

[0031] 2. The supporting assembly can quickly load and limit the battery, and can connect the connecting column with the battery electrode, so as to facilitate the rapid placement of the battery, and can detach the battery from the direction parallel to the center line of the connecting tube, so as to facilitate the rapid removal of the battery;

[0032] 3. The blocking plate provided can block the load-bearing component that moves downward due to the positive tilt, preventing the load-bearing component from leaving the moving channel and being unable to continue working. At the same time, the blocking plate fixed to the reaction box can facilitate the installation of the reset component, so that the reset component can reset the load-bearing component in a specific direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 What is shown is a schematic diagram of the overall structure of an embodiment;

[0034] Figure 2 Shown is a front cross-sectional view of an embodiment;

[0035] Figure 3 Shown is a right side cross-sectional view of an embodiment;

[0036] Figure 4 Shown is an exploded schematic diagram of a load-bearing assembly in an embodiment.

[0037] In the figure: 11, bearing cylinder; 12, connecting cylinder; 13, moving channel; 14, bearing assembly; 141, movable plug plate; 142, mounting frame; 143, contraction block; 144, spring; 15, reciprocating drive mechanism; 16, limit block; 17, connecting column; 18, floating block; 20, reaction box; 21, exhaust pipe; 22, liquid inlet pipe; 23, liquid outlet pipe; 24, discharge port; 25, sealing part; 31, blocking plate; 321, pushing cylinder; 322, ejection block; A, discharge position; B, material taking position. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0039] Example

[0040] Figure 1-Figure 4 The discharge device for recycling waste lithium batteries includes:

[0041] A placement module, the placement module comprises a plurality of synchronously intermittently rotating bearing cylinders 11, a connecting cylinder 12 is arranged in the middle of the bearing cylinder 11, a plurality of moving channels 13 are arranged circumferentially inside the bearing cylinder 11, a bearing assembly 14 with a floating block 18 is arranged in the moving channel 13, the bearing assembly 14 reciprocates in the direction of the moving channel 13, a reciprocating drive mechanism 15 is arranged on both sides of the bearing assembly 14, and a limit block 16 for limiting the bearing assembly 14 is arranged at the output end of the reciprocating drive mechanism 15;

[0042] A detection module, the detection module includes a power detection device, the power detection device is used to detect the remaining power of the battery, the power detection device is connected to two connecting posts 17 through a line, and the connecting posts 17 are located in the bearing assembly 14 and are used to connect to the battery electrodes;

[0043] A control module is used to receive the information collected by the detection module and make judgments. The control module is provided with battery safety power data. After receiving the data from the detection module, the control module determines whether the detection data is within the normal data range. When the detection data is within the normal data range, an electrical signal is provided to the reciprocating drive mechanism 15 to control the limit block 16 to disconnect the restriction on the bearing assembly 14, and the battery that has completed discharge at the bottom is quickly taken away from the treatment liquid by the float 18.

[0044] When discharging the battery, the used battery is placed on the carrier assembly 14 during the pause of the carrier cylinder 11, and the used battery is connected to the connecting column 17. Then the carrier cylinder 11 continues to rotate so that the used battery is gradually inverted and enters the treatment liquid. After the battery electrodes enter the treatment liquid, the discharge treatment begins. The power detection device monitors the remaining power of the battery in real time through the connecting column 17 and the battery and sends the data to the control module. When the battery enters and leaves the treatment liquid, the control module receives the detection data and judges that when the data is not in the normal data range, the battery continues to pass through the material taking position B and the material discharging position A as the carrier cylinder 11 rotates. The two positions do not perform material taking and material discharging operations, and the battery passes through the treatment liquid again for discharge treatment. When the data is in the normal data interval, the control module provides an electrical signal to the reciprocating drive mechanism 15 to control the limit block 16 to relatively shrink and disconnect the restriction on the carrying component 14. The floating block 18 drives the carrying component 14 and the battery to move up quickly and leave the processing liquid into the connecting tube 12 under the action of buoyancy. The battery stops moving after the carrying tube 11 enters the material picking position B, and then the battery is removed from the connecting tube 12 and the carrying component 14 is pushed back to re-restrict the carrying component 14. The reciprocating drive mechanism 15 receives the electrical signal to retract the limit block 16 so that it can re-restrict the carrying component 14. The carrying tube 11 continues to rotate to enter the discharge position A and pauses to wait for the discharge work. If there is no need to remove the battery, there is no need to push the carrying component 14 and control the reciprocating drive mechanism 15 to work again.

[0045] The intermittent circumferential rotation of the supporting cylinder 11 is used to invert the waste lithium battery and pass through the treatment liquid for discharge treatment. After the control module determines that the data obtained by the detection module is consistent, the limit block 16 disconnects the restriction on the supporting component 14 so that the floating block 18 drives the battery to move up quickly under the action of buoyancy, thereby instantly taking the waste lithium battery that has been discharged at any time away from the treatment liquid, avoiding corrosion to the battery electrodes, reducing material waste and avoiding affecting the recycling value.

[0046] The discharge method of the discharge device for recycling waste lithium batteries comprises the following steps:

[0047] S1. Place used batteries;

[0048] During the pause of the carrier cylinder 11, the used battery is placed on the carrier assembly 14, and the used battery is then connected to the connecting column 17. Then, the carrier cylinder 11 continues to rotate so that the used battery is gradually inverted and enters the treatment liquid.

[0049] S2, battery discharge processing;

[0050] After the battery electrodes are all in the treatment solution, the discharge process begins. The power detection device detects the remaining power of the battery in real time through the connection column 17 and the battery and sends the data to the control module;

[0051] S3, determining whether to release the battery;

[0052] During the process of the battery entering the treatment solution and leaving, the control module receives the detection data and judges that if the data is not in the normal data interval, it enters step S4, and if the data is in the normal data interval, it enters step S5;

[0053] S4, repeated discharge treatment;

[0054] As the carrier cylinder 11 rotates, the battery passes through the material taking position B and the material discharging position A. The two positions do not perform material taking and discharging operations, and enter step S2;

[0055] S5, release the battery;

[0056] The control module provides an electrical signal to the reciprocating drive mechanism 15 to control the limit block 16 to relatively shrink and disconnect the limit on the bearing assembly 14. The floating block 18 drives the bearing assembly 14 and the battery to quickly move upward and away from the treatment liquid into the connecting tube 12 under the action of buoyancy.

[0057] S6. Remove the battery;

[0058] The battery stops moving after the carrying cylinder 11 enters the material taking position B, and then the battery is removed from the connecting cylinder 12 and the carrying assembly 14 is pushed back to be restricted by the limit block 16 again. The carrying cylinder 11 continues to rotate to the material discharging position A and stops rotating to wait for the material discharging work.

[0059] Figure 2-Figure 4 In the figure, the bearing assembly 14 includes a movable stopper plate 141 movably inserted in the movable channel 13, and mounting frames 142 fixedly connected to the floating block 18 are arranged on both sides of the movable stopper plate 141. The limit block 16 is movably inserted in the mounting frame 142, and a shrinking block 143 is movably inserted in the mounting frame 142. The connecting column 17 is arranged on the shrinking block 143, and the top of the shrinking block 143 is arranged in a slope shape. The shrinking block 143 and the mounting frame 142 are fixedly connected by a spring 144.

[0060] When the used lithium battery is put in, since the top of the shrink block 143 is set in a slope shape, the bottom of the battery contacts the two shrink blocks 143 to shrink it into the mounting frame 142, and the spring 144 is compressed and deformed accordingly. After the battery is installed, the spring 144 in the compressed state pushes the shrink block 143 to return to its original position, and the connecting column 17 on the shrink block 143 contacts the battery electrode. When the discharged battery is removed, the battery can be removed from a direction parallel to the center line of the connecting tube 12.

[0061] The supporting assembly 14 can quickly load and limit the battery, connect the connecting column 17 with the battery electrode, and facilitate quick placement of the battery. The battery can also be detached from the direction parallel to the center line of the connecting tube 12, and the battery can be quickly removed.

[0062] Figure 1-Figure 3 It also includes: a reaction box 20, the placement module is located in the reaction box 20, the treatment liquid inside the reaction box 20 is lower than the position of the connecting tube 12, the reaction box 20 is provided with a sealing part 25 at the top of the placement module, and the top of the reaction box 20 is provided with a plurality of discharge ports 24 at the position of the sealing part 25.

[0063] Two adjacent connecting tubes 12 are fixedly connected, one of the connecting tubes 12 is rotatably plugged into the side wall of the reaction box 20, and the connecting tube 12 is connected to an external power device.

[0064] The supporting cylinder 11 is rotatably plugged into the reaction box 20 through the connecting cylinder 12. The external power equipment drives multiple supporting cylinders 11 to rotate synchronously through the corresponding connecting cylinders 12. At this time, the sealing part 25 is used to rotate and seal the top of the supporting cylinder 11. After the moving channel 13 moves to the position of the discharge port 24, the placement of the battery is completed.

[0065] The sealing portion 25 and the movable plug plate 141 cooperate to seal the discharge port 24 to prevent harmful gases generated during the discharge process from being discharged from the discharge port 24 .

[0066] Figure 1-Figure 3 In the embodiment, a blocking plate 31 is provided inside the carrying tube 11, and the blocking plate 31 is used to block the tilted and inverted carrying component 14. A reset member is provided in the middle of the blocking plate 31, and the reset member is used to reset the carrying component 14. The reset member includes an obliquely arranged pushing cylinder 321 and a pushing block 322, and the pushing cylinder 321 is connected to the line control module.

[0067] Two adjacent blocking plates 31 are fixedly connected, and one of the blocking plates 31 is fixedly connected to the inner wall of the reaction box 20 .

[0068] When the carrying cylinder 11 drives the released battery to move, the floating block 18 drives the battery in the carrying assembly 14 to float up and down in the moving channel 13. When the battery begins to tilt forward, the entire carrying assembly 14 drives the battery to move downward under the action of gravity until the movable plug plate 141 contacts the blocking plate 31. When the carrying cylinder 11 drives the carrying assembly 14 to move to the material taking position B, after the battery is removed, the control module sends an electrical signal to control the pushing cylinder 321 to work, and the pushing block 322 then pushes the entire carrying assembly 14 to reset through the movable plug plate 141.

[0069] The blocking plate 31 is configured to block the supporting component 14 that moves downward due to the positive tilt, thereby preventing the supporting component 14 from escaping from the moving channel 13 and being unable to continue working. At the same time, the blocking plate 31 fixed to the reaction box 20 can facilitate the installation of the reset component, so that the reset component can reset the supporting component 14 in a specific direction.

[0070] Figure 1-Figure 2 In the embodiment, an exhaust pipe 21 for exhausting waste gas is disposed on the top of the reaction box 20, and a liquid inlet pipe 22 for injecting treatment liquid and a liquid outlet pipe 23 for discharging treatment liquid are disposed on both sides of the bottom of the reaction box 20.

[0071] The exhaust pipe 21 is used to collect harmful gases in the discharge reaction to avoid direct discharge into the air to cause pollution. The treatment liquid can be injected into the reaction box 20 from the liquid inlet pipe 22 and discharged through the liquid outlet pipe 23, which can effectively remove impurities generated during the discharge process and cool the reaction box 20.

[0072] The front end of the reaction box 20 is provided with a sealing cylinder, and a blowing device is provided in the sealing cylinder. The sealing cylinder is used to seal the connecting cylinder 12, and a battery removal device is provided inside the sealing cylinder.

[0073] The taking-out device is used to take out the battery at the material taking position B and keep the reaction box 20 airtight under the action of the sealing cylinder. When the battery needs to be taken out, the blowing device blows external airflow into the reaction box 20 to prevent the leakage of harmful gases. At the same time, the blown-in airflow can dry the treatment liquid remaining on the surface of the battery.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A discharge device for recycling waste lithium batteries, characterized in that: include: A placement module, the placement module comprising a plurality of bearing cylinders (11) arranged to rotate synchronously and intermittently, a connecting cylinder (12) being arranged in the middle of the bearing cylinder (11), a plurality of moving channels (13) being arranged circumferentially inside the bearing cylinder (11), a bearing assembly (14) with a floating block (18) being arranged in the moving channel (13), the bearing assembly (14) reciprocating in the direction of the moving channel (13), a reciprocating drive mechanism (15) being arranged on both sides of the bearing assembly (14), and a limit block (16) for limiting the bearing assembly (14) being arranged at the output end of the reciprocating drive mechanism (15); A detection module, the detection module comprising a power detection device, the power detection device being used to detect the remaining power of the battery, the power detection device being connected to two connection posts (17) via a line, the connection posts (17) being located in the bearing assembly (14) and being used to connect to the battery electrodes; A control module is provided in the control module for receiving the information collected by the detection module and making judgments. The control module is provided with battery safety power data. After receiving the data from the detection module, the control module judges whether the detection data is within a normal data interval. When the detection data is within the normal data interval, an electrical signal is provided to the reciprocating drive mechanism (15) to control the limit block (16) to disconnect the restriction on the bearing component (14), and the battery at the bottom that has completed discharge is quickly taken away from the treatment liquid by the floating block (18).

2. The discharge device for recycling waste lithium batteries according to claim 1, characterized in that: The bearing assembly (14) comprises a movable plug plate (141) movably inserted in the movable channel (13); mounting frames (142) fixedly connected to the floating block (18) are arranged on both sides of the movable plug plate (141); the limit block (16) is movably inserted in the mounting frame (142); a shrinking block (143) is movably inserted in the mounting frame (142); the connecting column (17) is arranged on the shrinking block (143); and the shrinking block (143) and the mounting frame (142) are fixedly connected via a spring (144).

3. The discharge device for recycling waste lithium batteries according to claim 2, characterized in that: Also includes: A reaction box (20), wherein the placement module is located in the reaction box (20), the treatment liquid inside the reaction box (20) is lower than the position of the connecting tube (12), a sealing portion (25) is provided at the top of the placement module of the reaction box (20), and a plurality of discharge ports (24) are provided at the top of the reaction box (20) at the position of the sealing portion (25).

4. The discharge device for recycling waste lithium batteries according to claim 3, characterized in that: Two adjacent connecting cylinders (12) are fixedly connected, one of the connecting cylinders (12) is rotatably plugged into the side wall of the reaction box (20), and the connecting cylinder (12) is connected to an external power device.

5. The discharge device for recycling waste lithium batteries according to claim 3, characterized in that: A blocking plate (31) is arranged inside the bearing tube (11), and the blocking plate (31) is used to block the tilted and inverted bearing assembly (14). A reset member is arranged in the middle of the blocking plate (31), and the reset member is used to reset the bearing assembly (14). The reset member comprises a tilted pushing cylinder (321) and a pushing block (322), and the pushing cylinder (321) is connected to a line control module.

6. The discharge device for recycling waste lithium batteries according to claim 5, characterized in that: Two adjacent blocking plates (31) are fixedly connected, and one of the blocking plates (31) is fixedly connected to the inner wall of the reaction box (20).

7. The discharge device for recycling waste lithium batteries according to claim 3, characterized in that: An exhaust pipe (21) for discharging waste gas is arranged on the top of the reaction box (20), and a liquid inlet pipe (22) for injecting treatment liquid and a liquid outlet pipe (23) for discharging treatment liquid are respectively arranged on both sides of the bottom of the reaction box (20).

8. The discharge device for recycling waste lithium batteries according to claim 3, characterized in that: The front end of the reaction box (20) is provided with a sealing cylinder, the sealing cylinder is used to seal the connecting cylinder (12), and a battery removal device is provided inside the sealing cylinder.

9. The discharge method of the discharge device for recycling waste lithium batteries according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Place used batteries; During the pause of the supporting cylinder (11), the used battery is placed on the supporting assembly (14), and the used battery is then connected to the connecting column (17). Subsequently, the supporting cylinder (11) continues to rotate so that the used battery is gradually inverted and enters the treatment liquid; S2, battery discharge processing; After the battery electrodes are all in the treatment liquid, the discharge process begins, and the power detection device detects the remaining power of the battery in real time through the connecting column (17) and the battery and sends the data to the control module; S3, determining whether to release the battery; During the process of the battery entering the treatment solution and leaving, the control module receives the detection data and judges that if the data is not in the normal data interval, it enters step S4, and if the data is in the normal data interval, it enters step S5; S4, repeated discharge treatment; As the carrying cylinder (11) rotates, the battery passes through the material taking position (B) and the material discharging position (A), and the two positions do not perform material taking and discharging operations, and enter step S2; S5, release the battery; The control module provides an electrical signal to the reciprocating drive mechanism (15) to control the limit block (16) to relatively shrink and disconnect the limit on the bearing assembly (14); the floating block (18) drives the bearing assembly (14) and the battery to quickly move upward and away from the treatment liquid into the connecting tube (12) under the action of buoyancy; S6. Remove the battery; The battery stops moving after the carrying cylinder (11) enters the material taking position (B), and then the battery is removed from the connecting cylinder (12) and the carrying assembly (14) is pushed back to be restricted by the limit block (16) again. The carrying cylinder (11) continues to rotate to the material discharging position (A) and stops rotating to wait for the material discharging work.

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