Pole group recovery device

Abstract

The utility model provides a pole group recovery device which comprises a workbench used for bearing a pole group; the winding assembly is arranged above the workbench and can wind the diaphragm of the pole group upwards so as to expose the pole piece clamped in the diaphragm; and the two selecting assemblies are arranged on the two sides of the diaphragm respectively and can take down the pole pieces with different polarities on the diaphragm respectively and put the pole pieces in a distinguished mode. According to the pole group recycling device disclosed by the utility model, when the winding assembly winds the diaphragm upwards, the pole pieces on the two sides of the diaphragm are exposed in turn, and the selecting assembly divides the pole pieces on the diaphragm into positive poles and negative poles and then throws the pole pieces respectively, so that the pole groups are quickly disassembled and thrown in a classified manner, the manpower consumption in the pole group recycling process can be reduced, and the working efficiency is improved. Meanwhile, the recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrode group recycling device. Background Technology

[0002] Lithium-ion batteries are a crucial research area in the new energy industry, and their production quality directly impacts the performance of electrical devices. A lithium-ion battery typically consists of a casing, electrode assembly, and electrolyte. The electrode assembly is assembled within the casing, which is filled with electrolyte. Electrode assemblies are categorized into stacked and wound types based on their manufacturing processes. In the stacked process, defects such as foil leakage, foreign matter, material loss, tab folding, missing tabs, and poor tab soldering often occur during the assembly stage. Such defective electrode assemblies require scrapping.

[0003] Directly scrapping electrode assemblies affects production capacity and wastes materials. Recycling problematic electrode assemblies allows for the reuse of electrode sheets with recycling value. However, the recycling of problematic electrode assemblies usually involves manual disassembly and identification of the electrode sheets, which wastes a lot of manpower. Utility Model Content

[0004] In view of this, the present invention aims to provide an electrode group recycling device to reduce the manual labor required for electrode group recycling.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An electrode recovery device, comprising:

[0007] The worktable is used to support the electrode assembly;

[0008] A winding assembly, disposed above the worktable, is capable of winding the diaphragm of the electrode assembly upward to expose the electrode sheet sandwiched in the diaphragm;

[0009] The component is selected, with a set on each side of the diaphragm, which can remove and separately place the electrode sheets of different polarities on the diaphragm.

[0010] Furthermore, the workbench is provided with a limiting part;

[0011] The limiting portion forms a receiving space to accommodate the electrode assembly, thereby restricting the movement of the electrode assembly when the diaphragm is wound up.

[0012] Furthermore, it includes a first conveyor belt capable of feeding the electrode assembly into the receiving space.

[0013] Furthermore, the exit end of the first conveyor belt is provided with a guide slide, the height of which gradually decreases along the direction close to the accommodating space.

[0014] Furthermore, a recycling section is provided on each side of the workbench, and the two recycling sections are respectively used to recycle electrode sheets of different polarities that have been placed by the selection component.

[0015] Furthermore, the recycling unit includes a second conveyor belt, a vision inspection assembly, and a diversion assembly;

[0016] The vision inspection component is positioned above the second conveyor belt and is capable of detecting defects in the electrode sheet; the diversion component is positioned downstream of the vision inspection component and is capable of moving the defect-free electrode sheet and the defective electrode sheet to opposite sides of the width direction of the second conveyor belt, respectively.

[0017] Furthermore, the outlet end of the second conveyor belt is provided with two collection containers, which are arranged along the width direction of the second conveyor belt and are used to collect the defective electrode sheets and the defective electrode sheets, respectively.

[0018] Furthermore, the diversion assembly includes a first mounting base, a first driving part, and a baffle;

[0019] The baffle is rotatably mounted on the first mounting base, and the first driving unit is mounted on the first mounting base and can drive the baffle to rotate; when the electrode is conveyed by the second conveyor belt, it can be guided by the baffle to a predetermined side in the width direction of the second conveyor belt.

[0020] Furthermore, the second conveyor belts of the two recycling sections have opposite conveying directions and are arranged in a straight line.

[0021] Furthermore, the selection component includes a robotic arm and a suction unit;

[0022] The suction section is located at the free end of the robotic arm and has multiple negative pressure suction cups for suctioning and releasing the electrode sheet.

[0023] Furthermore, the winding assembly includes a second mounting base, a winding shaft, and a second drive unit;

[0024] The take-up shaft is detachably rotatably connected to the second mounting base for winding the diaphragm; the second drive unit is disposed on the second mounting base for driving the take-up shaft to rotate.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] The electrode group recycling device described in this utility model can expose the electrode sheets on both sides of the diaphragm in turn when the winding assembly winds the diaphragm upward. The selection assembly distinguishes the positive and negative electrodes on the diaphragm and puts them in separately, realizing the rapid splitting and classification of the electrode group. This can reduce the manual labor used in the electrode group recycling process and improve the recycling efficiency.

[0027] Secondly, the limiting part can limit the position of the electrode assembly. When the electrode assembly is unwound, the winding assembly pulls on the diaphragm during winding. The limiting part restricts the position of the electrode assembly, ensuring it remains in a position where the winding assembly can properly wind the diaphragm, making the winding of the diaphragm smoother. By using a first conveyor belt to feed the electrode assembly, it can be quickly delivered to the worktable and fall into the receiving space, eliminating the need for manual feeding, reducing manpower, and improving feeding efficiency.

[0028] Furthermore, the inclusion of guide chutes allows the electrode assemblies conveyed by the first conveyor belt to automatically slide into the receiving space due to gravity, ensuring more accurate loading. A recycling section allows for the separate recycling of positive and negative electrode sheets for their respective uses. The second conveyor belt transports the electrode sheets, and a vision inspection component detects defects during transport, such as foil leakage, foreign objects, material loss, folded electrode tabs, missing electrode tabs, and poor electrode tab soldering. A diversion component separates defective and undefective electrode sheets to opposite sides of the conveyor belt width, facilitating separate collection and processing of defective and undefective electrode sheets.

[0029] Furthermore, defect-free and defective electrodes can automatically fall into their corresponding collection containers, achieving automatic sorting. Once a certain amount of electrodes has been collected in the collection containers, the electrodes can be removed or the collection containers replaced to continue the electrode group recycling operation. The first drive unit of the diversion assembly can drive the baffle to rotate. By changing the angle of the baffle, defect-free and defective electrodes are guided to both sides by the baffle's plate surface.

[0030] Furthermore, aligning the two second conveyor belts in a straight line reduces the footprint of the electrode recovery device, making it more compact and facilitating the setup of the selection assembly. The selection assembly, via a robotic arm, allows for multi-angle and multi-directional movement of the suction unit, enabling the negative pressure suction cups to adsorb the electrode sheets. The winding assembly's winding shaft is detachable, allowing the entire assembly to be removed for transport after a certain amount of diaphragm has been wound, and a new winding shaft can be installed for easy diaphragm collection. Attached Figure Description

[0031] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0032] Figure 1 This is a schematic diagram of the stacked structure of the electrode assembly described in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the electrode recovery device described in an embodiment of the present invention;

[0034] Figure 3 This is a partial schematic diagram of the electrode recovery device described in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] a. Diaphragm; b. Positive electrode plate; c. Negative electrode plate;

[0037] 1. Workbench;

[0038] 2. Rewinding assembly; 201. Second mounting base; 202. Rewinding shaft; 203. Second drive unit;

[0039] 3. Selection components; 301. Robotic arm; 302. Suction unit; 303. Negative pressure suction cup;

[0040] 4. Limiting part; 401. Accommodation space;

[0041] 5. First conveyor belt;

[0042] 6. Guide slide;

[0043] 7. Recycling unit; 701. Second conveyor belt; 702. Vision inspection assembly; 703. Diversion assembly; 7031. First mounting base; 7032. First drive unit; 7033. Baffle;

[0044] 8. Collection container. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0046] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] This embodiment relates to an electrode group recycling device to reduce the manual labor required for electrode group recycling.

[0050] In terms of overall structure, the electrode assembly recycling device in this embodiment includes a worktable, a winding assembly, and a selection assembly. The worktable is used to support the electrode assembly. The winding assembly is located above the worktable and can wind the diaphragm of the electrode assembly upwards to expose the electrode sheets sandwiched in the diaphragm. The selection assembly is provided on each side of the diaphragm and can remove and separately place electrode sheets of different polarities from the diaphragm.

[0051] As configured above, the electrode group recycling device of this embodiment can expose the electrode sheets on both sides of the diaphragm in turn when the winding assembly winds the diaphragm upward. The selection assembly distinguishes the positive and negative electrodes on the diaphragm and puts them in separately, realizing the rapid splitting and classification of the electrode group. This can reduce the manual labor used in the electrode group recycling process and improve the recycling efficiency.

[0052] Based on the above overview, refer to Figures 1 to 3 As shown, specifically, the stacked electrode assembly is composed of a diaphragm a folded back and forth and assumed to be an electrode sheet. The electrode assembly recycling device in this embodiment is used to recycle dry electrode assemblies, that is, units that are not contaminated with electrolyte. Unwinding the electrode assembly means unfolding the diaphragm a to remove the positive electrode sheet b and the negative electrode sheet c. The operator first connects the end of the diaphragm a to the winding assembly 2, and then the winding assembly 2 automatically winds up the diaphragm a.

[0053] Among them, in order to prevent the electrode group from shaking and shifting excessively when being unrolled, a limiting part 4 is provided on the workbench 1. An accommodation space 401 for accommodating the electrode group is formed inside the limiting part 4 to limit the movement of the electrode group when the diaphragm a is being wound up. Setting the limiting part 4 can limit the position of the electrode group. When the electrode group is unrolled, the winding of the diaphragm a by the winding assembly 2 will have a pulling effect on the electrode group. The limiting part 4 restricts the position of the electrode group, enabling the electrode group to remain in a position where the winding assembly 2 can normally wind up the diaphragm a, making the winding of the diaphragm a smoother.

[0054] Specifically, the limiting part 4 of this embodiment includes four "L"-shaped columns, which are vertically and fixedly connected to the workbench 1 and together with the workbench 1 enclose a cuboid accommodation space 401 for facilitating the accommodation of the cuboid electrode group. Of course, the limiting part 4 can also be a "square"-shaped column, or four strip-shaped structures that limit the four sides of the electrode group, as long as it can keep the electrode group in the accommodation space 401.

[0055] Secondly, in order to facilitate the feeding of the electrode group, the electrode group recycling device of this embodiment further includes a first conveyor belt 5, which can feed the electrode group into the accommodation space 401. By setting the first conveyor belt 5 for feeding the electrode group, the electrode group can be quickly sent onto the workbench 1 and fall into the accommodation space 401, eliminating manual feeding, reducing the use of manpower, and at the same time improving the feeding efficiency.

[0056] Furthermore, a guiding slideway 6 is provided at the outlet end of the first conveyor belt 5, and the height of the guiding slideway 6 gradually decreases along the direction close to the accommodation space 401. The guiding slideway 6 of this embodiment is in the shape of a slope with a triangular longitudinal section. One end of the guiding slideway 6 is connected to the frame of the first conveyor belt 5, and the other end is lapped on the limiting part 4, with the edge flush with the edge of the accommodation space 401, making it easy for the electrode group to fall into the accommodation space 401. By setting the guiding slideway 6, when the electrode group conveyed by the first conveyor belt 5 enters the guiding slideway 6, it can automatically slide down into the accommodation space 401 due to gravity, and the feeding position is relatively accurate.

[0057] In addition, a recycling part 7 is provided on each side of the workbench 1, and the two recycling parts 7 are respectively used to recycle the electrode sheets of different polarities put by the selecting component 3. Setting the recycling part 7 can distinguish and recycle the positive electrode sheet b and the negative electrode sheet c for separate utilization.

[0058] Specifically, the recycling unit 7 includes a second conveyor belt 701, a vision inspection component 702, and a diversion component 703. The vision inspection component 702 is positioned above the second conveyor belt 701 and is capable of detecting defects in the electrode sheets. The diversion component 703 is positioned downstream of the vision inspection component 702 and is capable of moving defect-free and defective electrode sheets to opposite sides of the width of the second conveyor belt 701. The second conveyor belt 701 transports the electrode sheets, and the vision inspection component 702 detects defects in the electrode sheets during transport, such as foil leakage, foreign objects, material loss, tab folding, missing tabs, and poor tab soldering. The diversion component 703 separates the defect-free and defective electrode sheets to opposite sides of the conveyor belt width, facilitating separate collection and processing of the defective and undefective electrode sheets.

[0059] In this embodiment, the visual inspection component 702 spans above the second conveyor belt 701. The specific principle of the visual inspection component 702 can be achieved by using a CCD (Charge-coupled Device) camera, i.e., a digital camera with a charge-coupled device image sensor, in conjunction with a computer to perform visual inspection of the electrode sheets. The lens of the CCD camera faces the surface of the second conveyor belt 701 to acquire image information of the electrode sheets, which is then transmitted to the computer. After the computer identifies whether there are defects in the electrode sheets, it controls the shunting component 703 to shunt the electrode sheets.

[0060] Furthermore, the diversion assembly 703 includes a first mounting base 7031, a first drive unit 7032, and a baffle 7033. The baffle 7033 is rotatably mounted on the first mounting base 7031, and the first drive unit 7032 is mounted on the first mounting base 7031 and can drive the baffle 7033 to rotate. When the electrode sheet is conveyed by the second conveyor belt 701, it can be guided by the baffle 7033 to a predetermined side in the width direction of the second conveyor belt 701. The first drive unit 7032 of the diversion assembly 703 can drive the baffle 7033 to rotate, and by changing the angle state of the baffle 7033, defect-free electrode sheets and defective electrode sheets are respectively guided to both sides by the plate surface of the baffle 7033.

[0061] Specifically, the first mounting base 7031 spans across the second conveyor belt 701 in a gate shape. The first drive unit 7032 is connected to the top center of the first mounting base 7031, with its output end passing downwards through the first mounting base 7031 and connecting to a baffle 7033. The baffle 7033 has a wedge-shaped cross-section, with its larger end connected to the output shaft of the first drive unit 7032 and its smaller end extending away from the output shaft of the first drive unit 7032. In this embodiment, the first drive unit 7032 is a servo motor, capable of driving the baffle 7033 to swing, guiding the electrode sheet to a certain end in the width direction of the second conveyor belt 701 through the sidewall of the baffle 7033. It is understood that the first drive unit 7032 can also be a rotary cylinder or other rotating output device, as long as it can achieve the function of rotating the baffle 7033.

[0062] Meanwhile, to facilitate the collection of the diverted electrode sheets, two collection containers 8 are provided at the outlet end of the second conveyor belt 701. The two collection containers 8 are arranged along the width direction of the second conveyor belt 701, with the openings of the containers facing upwards and the top height lower than the height of the second conveyor belt 701. They are used to collect defective and undefective electrode sheets, respectively. Defective and undefective electrode sheets can automatically fall into the corresponding collection containers 8, realizing automatic sorting. After a certain amount of electrode sheets are collected in the collection containers 8, the electrode sheets can be removed or the collection containers 8 can be replaced to continue the electrode group recycling operation.

[0063] Furthermore, to better utilize the space, the second conveyor belts 701 of the two recycling units 7 in this embodiment convey in opposite directions and are arranged in a straight line, which reduces the footprint of the electrode recycling device, making it more compact overall and facilitating the installation of the selection component 3. In this embodiment, the selection component 3 is located on both sides of the width direction of the second conveyor belt 701, facilitating the removal of the electrode sheets from the diaphragm a. When the diaphragm a is unwound due to being wound up, the selection component 3 first removes the upper first polarity electrode sheet and places it onto the second conveyor belt 701 corresponding to the first polarity electrode sheet, and then removes the lower second polarity electrode sheet and places it onto the second conveyor belt 701 corresponding to the second polarity electrode sheet, thus achieving the sorting of the two polarity electrode sheets.

[0064] Furthermore, regarding the specific structure of the winding assembly 2, the winding assembly 2 includes a second mounting base 201, a winding shaft 202, and a second drive unit 203. The second mounting base 201 is L-shaped, extending upwards from the outside of the worktable 1. The winding shaft 202 is detachably rotatably connected to the upper extension end of the second mounting base 201 for winding the diaphragm a. The second drive unit 203 is disposed on the second mounting base 201 and is used to drive the winding shaft 202 to rotate. In this embodiment, the second drive unit 203 is a servo motor. The output shaft of the second drive unit 203 and the winding shaft 202 can be connected by a spline sleeve to achieve coaxial rotation.

[0065] In practice, the end of diaphragm a is adhered to the winding shaft 202. The winding shaft 202 rotates to wind up diaphragm a. After the diaphragm a of one electrode group is wound up, the end of the diaphragm a of the next electrode group is adhered to the end of the previous diaphragm a, and the winding of diaphragm a can continue. The winding shaft 202 of the winding assembly 2 is detachable, and after the winding shaft 202 has wound up a certain amount of diaphragm a, it can be completely removed for transportation, and a new winding shaft 202 can be installed to replace it, which facilitates the collection of diaphragm a.

[0066] Regarding the specific structure of the selection component 3, in this embodiment, the selection component 3 includes a robotic arm 301 and a suction unit 302. The suction unit 302 is located at the free end of the robotic arm 301 and has multiple negative pressure suction cups 303 for suction and release of electrode sheets. The selection component 3 can move the suction unit 302 at multiple angles and directions via the robotic arm 301, so that the negative pressure suction cups 303 of the suction unit 302 can adsorb the electrode sheets. The negative pressure suction cups 303 are connected to a negative pressure pipe to generate negative pressure, which can adsorb the electrode sheets. The use of multiple negative pressure suction cups 303 to adsorb the electrode sheets makes the electrode sheets less prone to damage.

[0067] The electrode assembly recycling device of this embodiment can use the selection component 3 to separate the positive and negative electrodes on the diaphragm a and place them separately when the winding component 2 winds the diaphragm a upwards. The visual inspection component 702 performs defect detection on the electrodes, and the diversion component 703 separates and collects the defective electrodes. This realizes the rapid splitting and sorting of the electrode assembly, which can reduce the manual labor used in the electrode assembly recycling process and improve the recycling efficiency.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrode recovery device, characterized in that, include: The worktable is used to support the electrode assembly; A winding assembly, disposed above the worktable, is capable of winding the diaphragm of the electrode assembly upward to expose the electrode sheet sandwiched in the diaphragm; The component is selected, with a set on each side of the diaphragm, which can remove and separately place the electrode sheets of different polarities on the diaphragm.

2. The electrode recovery device according to claim 1, characterized in that: The workbench is equipped with a limiting part; The limiting portion forms a receiving space to accommodate the electrode assembly, thereby restricting the movement of the electrode assembly when the diaphragm is wound up.

3. The electrode recovery device according to claim 2, characterized in that: Includes a first conveyor belt, which is capable of feeding the electrode assembly into the receiving space.

4. The electrode recovery device according to claim 3, characterized in that: The exit end of the first conveyor belt is provided with a guide slide, the height of which gradually decreases along the direction close to the accommodating space.

5. The electrode recovery device according to claim 1, characterized in that: Each side of the workbench is provided with a recycling section, and the two recycling sections are respectively used to recycle electrode sheets of different polarities that have been thrown by the selection component.

6. The electrode recovery device according to claim 5, characterized in that: The recycling section includes a second conveyor belt, a vision inspection assembly, and a diversion assembly; The vision inspection component is positioned above the second conveyor belt and is capable of detecting defects in the electrode sheet; the diversion component is positioned downstream of the vision inspection component and is capable of moving the defect-free electrode sheet and the defective electrode sheet to opposite sides of the width direction of the second conveyor belt, respectively.

7. The electrode recovery device according to claim 6, characterized in that: The outlet end of the second conveyor belt is provided with two collection containers, which are arranged along the width direction of the second conveyor belt and are used to collect the defective electrode sheets and the defective electrode sheets, respectively.

8. The electrode recovery device according to claim 6, characterized in that: The diversion component includes a first mounting base, a first driving part, and a baffle. The baffle is rotatably mounted on the first mounting base, and the first driving unit is mounted on the first mounting base and can drive the baffle to rotate; when the electrode is conveyed by the second conveyor belt, it can be guided by the baffle to a predetermined side in the width direction of the second conveyor belt.

9. The electrode recovery device according to claim 6, characterized in that: The second conveyor belts of the two recycling sections convey in opposite directions and are arranged in a straight line.

10. The electrode recovery device according to claim 1, characterized in that: The selection component includes a robotic arm and a suction unit; The suction unit is located at the free end of the robotic arm and has multiple negative pressure suction cups for suction and release of the electrode sheet; and / or, The winding assembly includes a second mounting base, a winding shaft, and a second drive unit; The take-up shaft is detachably rotatably connected to the second mounting base for winding the diaphragm; the second drive unit is disposed on the second mounting base for driving the take-up shaft to rotate.

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