Battery cell separation equipment

Abstract

The utility model relates to the technical field of battery cell recovery and separation, and provides battery cell separation equipment which comprises a separation box, a gas supply unit and a liquid supply unit. The separation box is provided with a containing cavity, preset liquid is stored in the containing cavity, the diaphragm and the pole piece are separated under the action of the preset liquid, the gas supply unit introduces preset gas into the containing cavity, the impact force of the preset gas promotes separation of the diaphragm and the pole piece, the diaphragm and the pole piece are layered in the preset liquid due to different densities, and the diaphragm floats on the liquid surface. The pole piece sinks at the bottom of the containing cavity, the liquid supply unit introduces preset liquid into the containing cavity, and the relative position of the liquid level in the height direction of the separation box is adjusted so that the diaphragm can be discharged from the first discharging opening of the separation box. Therefore, the diaphragms and the pole pieces in the waste battery cells are separated and recycled, so that the integrity of the recycled diaphragms and pole pieces is improved, and the separation efficiency of the pole pieces and the diaphragms is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery cell recycling and separation, and particularly relates to a battery cell separation device. BACKGROUND

[0002] With the continuous application of new energy batteries, more and more batteries have begun to be gradually eliminated, and researchers have begun to study the recycling methods of the eliminated batteries, especially the separation process of the battery pole pieces and the diaphragm.

[0003] In the prior art, the pole piece and the diaphragm are separated by peeling, specifically, the starting position of the pole piece is found, the end part of the pole piece and the diaphragm is fixed by using a mechanical clamping device, and the pole piece and the diaphragm are separated under the action of external mechanical force.

[0004] However, the mechanical peeling of the pole piece and the diaphragm is easy to cause the pole piece and the diaphragm to be broken, so that the separation efficiency of the pole piece and the diaphragm is reduced. Utility model content

[0005] The application provides a battery cell separation device, which can improve the separation efficiency of the pole piece and the diaphragm and the integrity of the recycled pole piece and diaphragm.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme:

[0007] The application provides a battery cell separation device applied to a battery cell separation process, the battery cell comprising a diaphragm and a pole piece, and comprising:

[0008] A separation box is provided with a feeding port and a first discharging port, and the separation box has a containing cavity. The feeding port is arranged at the top of the containing cavity. The side wall of the containing cavity is provided with a first opening and a second opening. The first opening forms the first discharging port. The first opening and the second opening are arranged on the opposite side walls of the containing cavity in the horizontal direction. The containing cavity has a preset liquid. The preset liquid is configured to separate the diaphragm and the pole piece.

[0009] A gas supply unit is arranged at the bottom of the separation box, and the gas supply unit is configured to introduce a preset gas into the containing cavity in the vertical direction. The impact force of the preset gas acts on the diaphragm and the pole piece, so that the diaphragm floats on the liquid surface of the preset liquid and the pole piece sinks at the bottom of the containing cavity.

[0010] A liquid supply unit comprises a first connecting pipe and a second connecting pipe. The first connecting pipe is communicated with the containing cavity and is configured to introduce the preset liquid into the containing cavity, so that the liquid surface is flush with the first opening. The second connecting pipe is communicated with the containing cavity through the second opening and is configured to introduce the preset liquid into the containing cavity in the horizontal direction. The liquid power of the preset liquid drives the diaphragm to move along the liquid surface and is discharged from the first opening.

[0011] The preset liquid in the battery cell separation device provided by the application is in the accommodating cavity of the separation box, the diaphragm and the pole piece soaked in the accommodating cavity are separated by the preset liquid, and then the preset gas is introduced into the accommodating cavity from the bottom of the accommodating cavity along the vertical direction by the gas supply unit. The flow of the preset gas in the preset liquid and the impact force of the preset gas on the pole piece and the diaphragm promote the separation of the pole piece and the diaphragm, and at the same time, the separated diaphragm and pole piece can form a layer in the preset liquid. Because the densities of the pole piece, the diaphragm and the preset liquid are different, the diaphragm will float on the liquid surface of the preset liquid, and the pole piece will sink to the bottom of the accommodating cavity. The first connecting pipe of the liquid supply unit first introduces the preset liquid into the accommodating cavity to make the liquid surface rise to the first opening, and then the second connecting pipe introduces the preset liquid into the accommodating cavity along the horizontal direction, and the liquid power of this part of the preset liquid will push the diaphragm on the liquid surface out of the accommodating cavity through the first opening. In this way, by using the battery cell separation device, the undamaged and complete diaphragm and pole piece can be obtained, and the battery cell separation device can simultaneously process a large number of battery cells, thereby improving the separation efficiency and recovery efficiency of the pole piece and the diaphragm.

[0012] As a possible implementation, the battery cell separation device further comprises a transfer mechanism, the separation box is further provided with a second discharge port, and the accommodating cavity further has a third opening to form the second discharge port; the third opening is in communication between the inside and the outside of the separation box, the height of the third opening along the vertical direction is higher than that of the first opening, and the third opening and the first opening are located on different side walls of the accommodating cavity.

[0013] The transfer mechanism is located in the accommodating cavity, and the transfer mechanism comprises a scraper, the scraper is in abutment with the cavity wall of the accommodating cavity, and the scraper is arranged to move along the vertical direction relative to the cavity wall of the accommodating cavity to drive the pole piece to move to the third opening and be discharged from the third opening.

[0014] As a possible implementation, the transfer mechanism comprises a conveyor belt, the conveyor belt is arranged relative to the cavity wall of the accommodating cavity, and the conveyor belt moves along the clockwise or counterclockwise direction relative to the cavity wall of the accommodating cavity.

[0015] The scraper is arranged on the conveyor belt, and the side of the scraper away from the conveyor belt is in abutment with the cavity wall of the accommodating cavity.

[0016] As a possible implementation, the accommodating cavity has a fourth opening to form the second discharge port, the fourth opening is located on the bottom side of the accommodating cavity, and the fourth opening is arranged to be openable and closable relative to the accommodating cavity, so that when the fourth opening is opened relative to the accommodating cavity, the pole piece is discharged from the fourth opening.

[0017] As a possible implementation, the liquid supply unit further comprises a liquid storage tank and a circulating pump, the liquid storage tank is configured to store the preset liquid, the circulating pump has an input end and two output ends, the input end is connected to the liquid storage tank, and one of the two output ends is connected to the first connecting pipe and the other output end is connected to the second connecting pipe.

[0018] As a possible implementation, the gas supply unit comprises a third connecting pipe and a fan, the first end of the third connecting pipe is in communication with the accommodating cavity, the fan is in communication with the second end of the third connecting pipe, and the fan is configured to introduce the preset gas into the third connecting pipe.

[0019] As a possible implementation, at least one of the first end of the first connecting pipe and the first end of the third connecting pipe has a connecting end, the connecting end is trumpet-shaped, and the radial dimension of the connecting end on the side facing the accommodating cavity in the vertical direction is greater than the radial dimension of the connecting end on the side facing away from the accommodating cavity.

[0020] As a possible implementation, the first connecting pipe has the connecting end, the first connecting pipe is arranged at the bottom of the separation box, and the first end of the third connecting pipe is in communication with the first connecting pipe.

[0021] As a possible implementation, the battery cell separation device further comprises a screening mechanism, the screening mechanism is arranged at least one of the first discharge port and the second discharge port;

[0022] The screening mechanism comprises a housing and a separation screen, the separation screen is connected to the first discharge port, the housing has an accommodating groove, the separation screen is located in the accommodating groove, and the side of the accommodating groove facing away from the separation screen is connected to the liquid supply unit.

[0023] As a possible implementation, the separation box further comprises a filter screen, the filter screen is arranged at least one of the first opening and the second opening, and the filter screen is connected to the cavity wall of the accommodating cavity.

[0024] The filter screen has filter holes, and the pore size of the filter holes is smaller than the width of the pole piece. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 The structure of the battery cell separation device provided by the embodiments of the present application Figure 1 ;

[0027] Figure 2 The structure diagram of the transfer mechanism in the battery cell separation device provided by the embodiments of the present application

[0028] Figure 3 The structure of the battery cell separation device provided by the embodiments of the present application Figure 2 .

[0029] Explanation of reference signs:

[0030] 100 - cell separation device;

[0031] 1 - separation tank; 11 - accommodating cavity; 12 - feeding port; 13 - first opening; 14 - second opening; 15 - third opening; 16 - fourth opening;

[0032] 2 - gas supply unit; 21 - third connecting pipe; 22 - fan;

[0033] 3 - liquid supply unit; 31 - first connecting pipe; 32 - liquid storage tank; 33 - circulating pump; 34 - first flow valve;

[0034] 4 - transfer mechanism; 41 - scraper; 42 - conveyor belt;

[0035] 5 - filter screen;

[0036] 6 - connecting end;

[0037] 7 - screening mechanism; 71 - housing; 72 - separation sieve; 73 - accommodating groove. DETAILED DESCRIPTION

[0038] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0039] With the continuous application of new energy batteries, more and more batteries have begun to be gradually eliminated, and researchers have begun to study the recycling methods of these eliminated batteries, especially the separation process of the pole pieces and the diaphragm of the battery.

[0040] In the prior art, the pole piece and the diaphragm are often separated by peeling, specifically, the starting position of the pole piece is found, the end part of the pole piece and the diaphragm is fixed by using a mechanical clamping device, and the pole piece and the diaphragm are separated under the action of external mechanical force.

[0041] However, this mechanical peeling of the pole piece and the diaphragm is easy to cause the pole piece and the diaphragm to break, which will reduce the separation efficiency of the pole piece and the diaphragm.

[0042] In order to overcome the defects in the prior art, the application provides an electric core separation device, which comprises a separation box, a gas supply unit and a liquid supply unit, wherein the separation box has a containing cavity, a certain preset liquid is stored in the containing cavity, the diaphragm and the pole piece are separated under the action of the preset liquid, the gas supply unit introduces the preset gas into the containing cavity, the impact force of the preset gas further promotes the separation of the diaphragm and the pole piece, and the diaphragm and the pole piece will form a stratification in the preset liquid due to the different densities of the diaphragm and the pole piece, the diaphragm floats on the liquid surface, and the pole piece sinks at the bottom of the containing cavity, the liquid supply unit introduces the preset liquid into the containing cavity, adjusts the relative position of the liquid surface along the height direction of the separation box, and makes the diaphragm discharge from the discharge port of the separation box. In this way, the diaphragm and the pole piece in the waste and old electric core can be separated and recycled, compared with the prior art, the completeness of the diaphragm and the pole piece recycled by the electric core separation device provided by the application is better, and the simultaneous separation operation of a large number of electric cores can be realized, and the separation efficiency of the pole piece and the diaphragm is improved.

[0043] The content of the application will be described in detail below with reference to the drawings, so that those skilled in the art can more clearly and detailedly understand the content of the application.

[0044] Figure 1 The structure of the electric core separation device provided by the embodiment of the application Figure 1 . Figure 2 The structure diagram of the transfer mechanism in the electric core separation device provided by the embodiment of the application. Figure 3 The structure of the electric core separation device provided by the embodiment of the application Figure 2 . As Figures 1-3 indicated, the embodiment provides an electric core separation device 100 applied to an electric core separation process, the electric core comprises a diaphragm and a pole piece, and comprises a separation box 1, a gas supply unit 2 and a liquid supply unit 3. Wherein, the electric core can be a ternary lithium electric core or a lithium iron phosphate electric core, and for the forming process of the electric core, it can be a laminated formed electric core and a wound formed electric core.

[0045] Wherein, the separation box 1 is provided with a feeding port 12 and a first discharge port, and the separation box 1 has a containing cavity 11, the feeding port 12 is arranged at the top of the containing cavity 11, the side wall of the containing cavity 11 has a first opening 13 and a second opening 14, the first opening 13 forms the first discharge port, the first opening 13 and the second opening 14 are arranged on the opposite side walls of the containing cavity 11 along the horizontal direction, the containing cavity 11 has a preset liquid, and the preset liquid is configured to separate the diaphragm and the pole piece.

[0046] The gas supply unit 2 is arranged at the bottom of the separation box 1, and the gas supply unit 2 is configured to introduce the preset gas into the containing cavity 11 along the vertical direction, the impact force of the preset gas acts on the diaphragm and the pole piece, so that the diaphragm floats on the liquid surface of the preset liquid and the pole piece sinks at the bottom of the containing cavity 11.

[0047] The liquid supply unit 3 comprises a first connecting pipe 31 and a second connecting pipe (not shown in the figure), the first connecting pipe 31 is in communication with the accommodating cavity 11, the first connecting pipe 31 is configured to supply a preset liquid into the accommodating cavity 11 to make the liquid level flush with the first opening 13, and the second connecting pipe is in communication with the accommodating cavity 11 through the second opening 14, the second connecting pipe is configured to supply the preset liquid into the accommodating cavity 11 in the horizontal direction, the liquid power of the preset liquid drives the diaphragm to move along the liquid level and is discharged from the first opening 13.

[0048] The preset liquid in the electric core separation device 100 provided by the embodiment is in the accommodating cavity 11 of the separation box 1, the diaphragm and the pole piece soaked in the accommodating cavity 11 are separated by the preset liquid, and then the preset gas is supplied into the accommodating cavity 11 from the bottom of the accommodating cavity 11 through the gas supply unit 2 in the vertical direction, the flow of the preset gas in the preset liquid, and the impact force of the preset gas acting on the pole piece and the diaphragm can promote the separation of the pole piece and the diaphragm, and at the same time, the separated diaphragm and pole piece can form a stratification in the preset liquid. Because the densities of the pole piece, the diaphragm and the preset liquid are different, the diaphragm will float on the liquid level of the preset liquid, and the pole piece will sink to the bottom of the accommodating cavity 11. At this time, the first connecting pipe 31 of the liquid supply unit 3 supplies the preset liquid into the accommodating cavity 11 to make the liquid level rise to the first opening 13, and then the second connecting pipe supplies the preset liquid into the accommodating cavity 11 in the horizontal direction, and the liquid power of this part of the preset liquid will drive the diaphragm on the liquid level to be discharged from the accommodating cavity 11 through the first opening 13. In this way, by using the electric core separation device 100, the undamaged and complete diaphragm and pole piece can be obtained, and the electric core separation device 100 can process a large number of electric cores at the same time, and the separation efficiency and recovery efficiency of the pole piece and the diaphragm can be improved.

[0049] For example, the top of the separation box 1 is provided with a feeding port 12, the feeding port 12 is in communication with the accommodating cavity 11, and the electric core to be separated can be fed into the accommodating cavity 11 through the feeding port 12. The position of the feeding port 12 on the top of the separation box 1 is not limited. The accommodating cavity 11 stores a certain amount of preset liquid, the electric core enters the accommodating cavity 11 and is soaked in the preset liquid, the preset liquid can accommodate the adhesive between the diaphragm and the pole piece of the electric core to reduce the adhesion between the diaphragm and the pole piece, and the tension of the preset liquid acts between the diaphragm and the pole piece to separate the diaphragm and the pole piece. The separated pole piece and diaphragm do not need to be torn and pulled by mechanical external force, and the pole piece and diaphragm will not be damaged, thereby ensuring the integrity of the pole piece and diaphragm.

[0050] In order to improve the separation efficiency of the pole pieces and the diaphragms, the pole pieces and the diaphragms are layered in the accommodating cavity 11. The gas supply unit 2 in the embodiment is arranged at the bottom of the separation tank 1, and the gas supply unit 2 supplies preset gas into the accommodating cavity 11 along the vertical direction. The impact force generated by the flow of the preset gas acts on the pole pieces and the diaphragms, and impacts the pole pieces and the diaphragms to accelerate the separation of the pole pieces and the diaphragms. It can be understood that the diaphragms, the pole pieces and the preset liquid have different densities, and when the preset gas flows in the accommodating cavity 11, the diaphragms and the pole pieces that have been separated form relative movement under the impact force of the preset gas, the diaphragms float on the liquid surface of the preset liquid, and the pole pieces sink to the bottom of the accommodating cavity 11. It should be noted that the relative position of the gas supply unit 2 at the bottom of the separation tank 1 is not limited.

[0051] Further, the side wall of the accommodating cavity 11 is provided with a first opening 13 and a second opening 14, the first opening 13 and the second opening 14 are arranged on the opposite side walls of the accommodating cavity 11 along the horizontal direction, and the heights of the first opening 13 and the second opening 14 along the vertical direction are as consistent as possible. In this way, the first connecting pipe 31 is connected to the accommodating cavity 11, the first connecting pipe 31 supplies the preset liquid into the accommodating cavity 11, the liquid surface of the preset liquid rises to be flush with the first opening 13, and the first connecting pipe 31 stops supplying the preset liquid into the accommodating cavity 11. It can be understood that the rising of the liquid surface of the preset liquid drives the diaphragms floating on the liquid surface to move to a position flush with the first opening 13. The second connecting pipe is connected to the second opening 14, and the second connecting pipe can supply the preset liquid into the accommodating cavity 11 along the horizontal direction through the second opening 14. This part of the preset liquid flows from the second opening 14 to the first opening 13 along the horizontal direction, and in the process of flowing, the liquid power of the preset liquid drives the diaphragms to move along the liquid surface to the first opening 13 and is discharged from the first opening 13, so that the separated diaphragms can be obtained. It should be noted that the connection position of the first connecting pipe 31 and the separation tank 1 in the embodiment is not limited, and only needs to ensure that the first connecting pipe 31 is connected to the accommodating cavity 11 of the separation tank 1 and can supply the preset liquid into the accommodating cavity 11, so as to adjust the position of the liquid surface of the preset liquid and the first opening 13 along the vertical direction.

[0052] In the embodiment, the preset liquid includes one of dimethyl carbonate, propylene carbonate, ethylene carbonate, methyl ethyl carbonate and diethyl carbonate.

[0053] On the basis of the foregoing embodiment, the battery cell separating device 100 provided in the embodiment further comprises a transfer mechanism 4, the separating box 1 is further provided with a second discharge port, and the accommodating cavity 11 further has a third opening 15 to form the second discharge port. The third opening 15 communicates between the inside and outside of the separating box 1, the height of the third opening 15 in the vertical direction is higher than that of the first opening 13, and the third opening 15 and the first opening 13 are located on different side walls of the accommodating cavity 11. The transfer mechanism 4 is located in the accommodating cavity 11, and the transfer mechanism 4 comprises a scraper 41. The scraper 41 abuts against the cavity wall of the accommodating cavity 11 and is arranged to move in the vertical direction relative to the cavity wall of the accommodating cavity 11 to drive the pole piece to move to the third opening 15 and be discharged from the third opening 15. In this way, after the diaphragm is discharged from the accommodating cavity 11, the transfer mechanism 4 can be started to discharge the pole piece from the third opening 15 of the separating box 1.

[0054] Specifically, the third opening 15 is formed in the separating box 1 and communicates with the accommodating cavity 11. The third opening 15 and the first opening 13 are arranged on different side walls of the separating box 1, and the height of the third opening 15 in the vertical direction is higher than that of the first opening 13. In this way, the preset liquid can be prevented from being discharged from the third opening 15 during the discharge of the diaphragm, and correspondingly, the diaphragm can also be prevented from being discharged from the third opening 15. Further, the scraper 41 in the transfer mechanism is arranged in the accommodating cavity 11, and the edge of the scraper 41 abuts against the cavity wall of the accommodating cavity 11. The scraper 41 moves in the vertical direction along the cavity wall of the accommodating cavity 11. During the movement of the scraper 41, the pole piece at the bottom of the accommodating cavity 11 can be scraped off and driven to the third opening 15 in the vertical direction. The scraper 41 will continue to move in the vertical direction, and the pole piece and the scraper 41 are disengaged from each other, so that the pole piece can be discharged from the third opening 15. It should be noted that the third opening 15 in the embodiment is the second discharge port.

[0055] Further, the transfer mechanism 4 comprises a conveying belt 42, which is arranged relative to the cavity wall of the accommodating cavity 11 and moves in the clockwise or counterclockwise direction relative to the cavity wall of the accommodating cavity 11. The scraper 41 is arranged on the conveying belt 42, and the side of the scraper 41 away from the conveying belt 42 abuts against the cavity wall of the accommodating cavity 11. In this way, the movement of the conveying belt 42 relative to the cavity wall of the accommodating cavity 11 can drive the scraper 41 to move, so as to transport the pole piece at the bottom of the accommodating cavity 11 to the third opening 15 and discharge the pole piece from the third opening 15.

[0056] The conveying belt 42 is arranged along the cavity wall of the accommodating cavity 11, and can be understood as forming a circumferential movement track. The conveying belt 42 moves in a clockwise or counterclockwise direction to drive the pole piece to the third opening 15. Specifically, the scraper 41 is arranged on the conveying belt 42, and the side of the scraper 41 away from the conveying belt 42 abuts against the cavity wall of the accommodating cavity 11. Adjacent two scrapers 41 are arranged along the extension direction of the conveying belt 42 and form an accommodating space between the adjacent scrapers 41. When the scraper 41 moves, the pole piece is driven into the accommodating space, so as to be transferred to the third opening 15, and the pole piece is discharged from the third opening 15. In this way, the transfer mechanism 4 can improve the recovery efficiency of the pole piece.

[0057] To avoid the pole piece being discharged from the first opening 13 when the transfer mechanism 4 drives the pole piece to move through the first opening 13, the separation tank 1 in this embodiment further comprises a filter screen 5. The filter screen 5 is arranged corresponding to at least one of the first opening 13 and the second opening 14, and is connected with the cavity wall of the accommodating cavity 11. The filter screen 5 has filter holes, and the diameter of the filter holes is smaller than the width of the pole piece. In this way, the pole piece is blocked at the first opening 13 and the second opening 14 by the filter screen 5, so as to prevent the pole piece from mixing with the discharged diaphragm, further improve the separation degree of the pole piece and the diaphragm, and at the same time, the pole piece will not enter the second opening 14, avoiding the blockage of the liquid supply unit 3, and improving the safety of the battery cell separation equipment 100.

[0058] It can be understood that the filter screen 5 is arranged corresponding to the first opening 13 and is connected with the cavity wall of the accommodating cavity 11. On the one hand, the installation and disassembly of the filter screen 5 in the accommodating cavity 11 provides a working space, which is convenient for the worker to install and disassemble the filter screen 5. At the same time, when the pole piece is blocked at the filter screen 5 and the diaphragm cannot be discharged, the worker can also timely handle through the working space formed by the accommodating cavity 11. In this embodiment, in order to ensure that the filter screen 5 can only discharge the diaphragm from the filter holes, the diameter of the filter holes needs to be smaller than the width of the pole piece.

[0059] Similarly, the filter screen 5 can also be arranged corresponding to the second opening 14. The structure and arrangement of the filter screen 5 corresponding to the second opening 14 are consistent with those of the filter screen 5 corresponding to the first opening 13. The working principle and effect of the filter screen 5 corresponding to the second opening 14 are the same as those of the filter screen 5 corresponding to the first opening 13, and will not be described here.

[0060] It should be noted that the diameter of the filter hole in this embodiment is 50-100 mm.

[0061] Alternatively, the filter screen 5 can be arranged corresponding to the first opening 13 and the second opening 14. Figure 3As shown, the accommodation cavity has a fourth opening 16 to form a second discharge port, the fourth opening 16 is located at the bottom side of the accommodation cavity 11, and the fourth opening 16 is arranged to be openable and closable relative to the accommodation cavity 11, so that when the fourth opening 16 is opened relative to the accommodation cavity 11, the pole piece is discharged from the fourth opening 16. In this way, after the diaphragm is completely discharged from the first opening 13, the fourth opening 16 at the bottom of the separation box 1 only needs to be opened, and the preset liquid and the pole piece can be discharged together from the bottom of the accommodation cavity 11, and then only needs to be separated. It should be noted that the relative position of the fourth opening 16 at the bottom of the accommodation cavity 11 is not limited.

[0062] As a possible implementation, the liquid supply unit 3 further includes a liquid storage tank 32 and a circulating pump 33, the liquid storage tank 32 is configured to store the preset liquid, and the circulating pump 33 has an input end and two output ends, the input end is connected to the liquid storage tank 32, and one of the two output ends is connected to the first connecting pipe 31, and the other output end is connected to the second connecting pipe. In this way, the liquid supply unit 3 forms a liquid circuit, and the preset liquid is introduced into the accommodation cavity 11 through the cooperation of the circulating pump 33 and the first connecting pipe 31 and the second connecting pipe.

[0063] Specifically, the liquid storage tank 32 stores the preset liquid, the input end of the circulating pump 33 is in communication with the liquid storage tank 32, and the preset liquid is pumped into the first connecting pipe 31 and the second connecting pipe through the output end. The two output ends of the circulating pump 33, one is in communication with the first connecting pipe 31, and the other output end is in communication with the second connecting pipe, the circulating pump 33 can pump the preset liquid into the first connecting pipe 31 and the second connecting pipe at the same time, or selectively pump the preset liquid into the first connecting pipe 31 and the second connecting pipe. The circulating pump 33 pumps the preset liquid into the first connecting pipe 31, that is, a part of the preset liquid is pre-placed into the accommodation cavity 11 and then stopped working, the battery cell is put into the accommodation cavity 11, and the part of the preset liquid acts on the battery cell to reduce the adhesion between the diaphragm and the pole piece, and the diaphragm and the pole piece are separated by the tension of the preset liquid. After the diaphragm and the pole piece are separated in the preset liquid by introducing the preset gas into the accommodation cavity 11 through the gas supply unit 2, the gas supply unit 2 stops working. Further, the circulating pump 33 is started again, and the preset liquid is pumped into the first connecting pipe 31 through the output end, and the preset liquid is introduced into the accommodation cavity 11 through the first connecting pipe 31 again to adjust the height of the liquid level of the preset liquid along the vertical direction relative to the first opening 13, and the circulating pump 33 stops pumping the preset liquid into the first connecting pipe 31 after ensuring that the liquid level is flush with the first opening 13. Then, the circulating pump 33 pumps the preset liquid into the second connecting pipe, the second connecting pipe is in communication with the second opening 14, and the preset liquid pumped into the second connecting pipe flows in the horizontal direction in the accommodation cavity 11. The liquid power formed by the preset liquid in the horizontal direction will drive the diaphragm floating on the liquid surface to flow to the first opening 13, and then be discharged from the first opening 13 along with the flow of the preset liquid.

[0064] As a possible implementation, the liquid supply unit 3 further comprises two first flow valves 34, one of which is arranged on the first connecting pipe 31 and the other is arranged on the second connecting pipe; the two first flow valves 34 are configured to control the flow rate of the preset liquid into the first connecting pipe 31 and the second connecting pipe, respectively. In this way, the flow rate of the preset liquid is controlled by the first flow valve 34, and the size of the liquid power of the preset liquid is controlled to ensure the integrity of the separator recovered by the battery cell separation device 100.

[0065] Specifically, the two output ends of the circulating pump 33 respectively pump the preset liquid to the first connecting pipe 31 and the second connecting pipe, and the circulating pump 33 has a working pressure. The first flow valve 34 is arranged on the first connecting pipe 31 and can control the flow rate of the preset liquid into the accommodation cavity 11. By controlling the flow rate of the preset liquid, the pump-in pressure of the preset liquid is reduced to prevent the preset liquid pressure from being too large to cause the separator to be damaged by acting on the pole piece and the separator. It can be understood that the first flow valve 34 is arranged on the second connecting pipe to control the flow rate and pressure of the preset liquid into the accommodation cavity 11 along the horizontal direction. The size of the flow rate of the preset liquid into the accommodation cavity 11 along the horizontal direction is positively correlated with the size of the liquid power. In this way, the moving speed of the separator along the horizontal direction is further controlled, and thus the discharge rate of the separator from the first opening 13 is controlled. Furthermore, the first flow valve 34 arranged on the second connecting pipe can hinder the flow of the preset liquid and reduce the flow pressure of a part of the preset liquid to avoid the preset liquid from being damaged by the excessive pressure before being discharged from the first opening 13, so as to improve the integrity of the separator separation. It should be noted that the opening and closing size of the first flow valve 34 can be controlled according to actual needs. Specifically, the flow speed of the preset liquid is controlled by the first control valve to be 0.0159-0.0317 m / s.

[0066] Further, the liquid supply unit 3 further comprises a controller, the controller is electrically connected with the circulating pump 33, and the controller is configured to adjust the working frequency of the circulating pump 33 according to a preset time value. During the working process of the circulating pump 33, the working frequency will decrease with the lapse of working time. In this embodiment, a preset time value is set by the controller, for example, 5-10 minutes. After the circulating pump 33 works for 5 minutes, the controller adjusts the working frequency of the circulating pump 33 to the initial working frequency, for example, the working frequency of the circulating pump 33 is 50 Hz. During the adjustment of the circulating pump 33, the working frequency of the circulating pump 33 relatively increases. It can be understood that the flow of the preset liquid in the accommodating cavity 11 will form a regular pulsating water flow, and the adjustment is performed in a period of 5-10 minutes. In this way, when the pulsating water flow of the preset liquid changes periodically, the liquid power changes accordingly, and the liquid power acts on the pole piece and the diaphragm, which can promote the separation of the diaphragm and the pole piece. It should be noted that the preset time value of the controller in this embodiment is not limited to 5-10 minutes, and in practice, a suitable preset time value can be selected according to the needs.

[0067] As a possible implementation, the gas supply unit 2 comprises a third connecting pipe 21 and a fan 22. The first end of the third connecting pipe 21 is in communication with the accommodating cavity 11, and the fan 22 is in communication with the second end of the third connecting pipe 21. The fan 22 is configured to introduce a preset gas into the third connecting pipe 21. It should be noted that the preset gas in this embodiment is air.

[0068] Illustratively, the first end of the third connecting pipe 21 is arranged at the bottom of the accommodating cavity 11, the second end of the third connecting pipe 21 is in communication with the fan 22, and the fan 22 rotates to introduce external air into the accommodating cavity 11 from the bottom of the accommodating cavity 11 through the third connecting pipe 21. The air flows in the vertical direction in the accommodating cavity 11, and the impact force formed by the air flow acts on the pole piece and the diaphragm to promote the separation of the pole piece and the diaphragm. At the same time, the separated diaphragm and pole piece will flow in the preset liquid under the impact of the air. Due to the difference in density between the pole piece, the diaphragm and the preset liquid, the pole piece and the diaphragm are layered in the preset liquid. Finally, the diaphragm floats on the surface of the preset liquid, and the pole piece sinks to the bottom of the accommodating cavity 11.

[0069] Further, in some embodiments, in order to prevent the preset liquid in the accommodating cavity 11 from flowing back into the third connecting pipe 21, a one-way valve can be arranged on the third connecting pipe 21.

[0070] The first connecting pipe 31 and the third connecting pipe 21 have various structures. In a specific implementation, at least one of the first end of the first connecting pipe 31 and the first end of the third connecting pipe 21 has a connecting end 6 that is trumpet-shaped, and the radial dimension of the connecting end 6 on the side facing the accommodating cavity 11 in the vertical direction is greater than the radial dimension of the connecting end 6 on the side facing away from the accommodating cavity 11. In this way, by virtue of the trumpet-shaped structure of the connecting end 6, the relative area of the first connecting pipe 31 or the third connecting pipe 21 and the accommodating cavity 11 is increased, so that the projection area of the preset liquid and the preset gas into the accommodating cavity 11 along the corresponding flow direction is increased, so that the preset liquid and the preset gas act on the pole piece and the diaphragm as much as possible, so as to improve the separation effect and efficiency of the preset liquid or the preset gas on the pole piece and the diaphragm.

[0071] It can be understood that the first end of the first connecting pipe 31 has a connecting end 6 that is trumpet-shaped and that is in communication with the accommodating cavity 11, and the radial dimension of the connecting end 6 of the first connecting pipe 31 on the side facing the accommodating cavity 11 is greater than the radial dimension of the connecting end 6 on the side facing away from the accommodating cavity 11, that is, the radial dimension of the connecting end 6 of the first connecting pipe 31 gradually decreases from the side close to the accommodating cavity 11 along the extension direction of the first connecting pipe 31. In this way, the first connecting pipe 31 is in communication with the accommodating cavity 11 through the connecting end 6, and the projection area of the connecting end 6 relative to the accommodating cavity 11 along the flow direction of the preset liquid is increased, so that the pressure of the pumped-in preset liquid can be reduced, and the liquid power of the preset liquid acting on the diaphragm is prevented from being too large to cause damage to the diaphragm.

[0072] The first end of the third connecting pipe 21 also has a connecting end 6 that is trumpet-shaped and that is in communication with the bottom of the accommodating cavity 11, and the radial dimension of the connecting end 6 of the third connecting pipe 21 on the side facing the accommodating cavity 11 is greater than the radial dimension of the connecting end 6 on the side facing away from the accommodating cavity 11, that is, the radial dimension of the connecting end 6 of the third connecting pipe 21 gradually decreases from the side close to the accommodating cavity 11 along the extension direction of the third connecting pipe 21. In this way, the projection area of the connecting end 6 of the third connecting pipe 21 relative to the accommodating cavity 11 along the flow direction of the preset liquid is increased, and the preset gas entering the accommodating cavity 11 is dispersed, so that the impact force of the preset gas acts on the diaphragm and the pole piece from as many angles as possible, so as to accelerate the separation of the diaphragm and the pole piece.

[0073] In the embodiment, the first connecting pipe 31 and the third connecting pipe 21 can have the trumpet-shaped connecting end 6 at the same time, or the first connecting pipe 31 has the trumpet-shaped connecting end 6, and the third connecting pipe 21 has other structures, or the first connecting pipe 31 has other structures, and the third connecting pipe 21 has the trumpet-shaped connecting end 6. It should be noted that when the first connecting pipe 31 or the third connecting pipe 21 has other connecting structures, the corresponding preset gas or preset liquid can still be introduced into the accommodating cavity 11.

[0074] Specifically, the first connecting pipe 31 has the connecting end 6, the first connecting pipe 31 is arranged at the bottom of the separation box 1, and the first end of the third connecting pipe 21 is communicated with the first connecting pipe 31. In this way, the liquid supply unit 3 and the gas supply unit 2 introduce the preset liquid and the preset gas into the accommodating cavity 11 through the first connecting pipe 31, the functions of the liquid supply unit 3 and the gas supply unit 2 are integrated, the overall connecting structure of the battery cell separation device 100 can be simpler, the integration degree of the battery cell separation device 100 is increased, and correspondingly, the battery cell separation device 100 is compact in structure and small in space ratio on the basis of meeting the functionality.

[0075] Further, the gas supply unit 2 further includes a second flow valve, the second flow valve is arranged between the third connecting pipe 21 and the fan 22, and the second flow valve is configured to control the flow of the preset gas. In the embodiment, the flow of the preset gas is adjusted by the opening degree of the second flow valve. It can be understood that the size of the flow of the preset gas is positively correlated with the impact force of the preset gas, and controlling the flow of the preset gas can promote the separation of the tab and the diaphragm, and also prevent the diaphragm from being damaged due to the excessive impact force of the preset gas. In this way, the integrity of the separated tab and diaphragm can be higher.

[0076] The battery cell separation device 100 provided by the embodiment of the application further includes a screening mechanism 7, the screening mechanism 7 is correspondingly arranged in at least one of the first discharge port and the second discharge port; the screening mechanism 7 includes a housing 71 and a separation screen 72, the separation screen 72 is connected to the first discharge port in a opposite manner, the housing 71 has an accommodating groove 73, the separation screen 72 is located in the accommodating groove 73, and the side of the accommodating groove 73 away from the separation screen 72 is connected to the liquid supply unit 3. In this way, the diaphragm and the preset liquid discharged from the first discharge port are separated by the screening mechanism 7, the tab and the preset liquid discharged from the second discharge port are separated, and the screened preset liquid is supplied into the accommodating cavity 11 by the liquid supply unit 3, forming a flow cycle of the preset liquid.

[0077] Specifically, the screening mechanism 7 can be arranged corresponding to the first opening 13, and the screening mechanism 7 includes a shell 71 and a separation screen 72. The shell 71 has a receiving groove 73, and a first end of the receiving groove 73 is opposite to the first opening 13. The diaphragm and the preset liquid discharged from the first opening 13 enter the receiving groove 73. The separation screen 72 is located in the receiving groove 73. When the mixture of the preset liquid and the diaphragm enters the receiving groove 73, the diaphragm is left in the receiving groove 73 through the separation and filtration of the separation screen 72, and the preset liquid flows along the path of the shell 71 and finally flows into the liquid storage tank 32 of the liquid supply unit 3, so as to be ready for the next flow cycle of the preset liquid.

[0078] It can be understood that, as shown in Figure 1 the screening mechanism 7 can also be arranged corresponding to the third opening 15. The screening mechanism 7 arranged corresponding to the third opening 15 includes the shell 71 and the separation screen 72. The shell 71 has the receiving groove 73, and a first end of the receiving groove 73 is opposite to the third opening 15. The pole piece and the preset liquid discharged from the third opening 15 enter the receiving groove 73. The separation screen 72 is located in the receiving groove 73. When the mixture of the preset liquid and the pole piece enters the receiving groove 73, the diaphragm is left in the receiving groove 73 through the separation and filtration of the separation screen 72, and the preset liquid flows along the path of the shell 71 and finally flows into the liquid storage tank 32 of the liquid supply unit 3, so as to be ready for the next flow cycle of the preset liquid. It should be noted that the separation screen 72 in the embodiment can be a screen, a sieve plate or a screening funnel.

[0079] Alternatively, as shown in Figure 3 the screening mechanism 7 can also be arranged corresponding to the fourth opening 16. The structure and function of the screening mechanism 7 arranged corresponding to the fourth opening 16 are the same as those of the screening mechanism 7 arranged corresponding to the third opening 15, and details are not repeated here.

[0080] It should be noted that the screening mechanism 7 in the embodiment can be arranged corresponding to only the first opening 13, or arranged corresponding to only the third opening 15 or the fourth opening 16, or the first opening 13 is arranged with the screening mechanism 7, and the third opening 15 or the fourth opening 16 is arranged with the screening mechanism 7.

[0081] In a specific embodiment, the screening mechanism 7 is two, one of the two screening mechanisms 7 is arranged corresponding to the first discharge port, and the other screening mechanism 7 is arranged corresponding to the second discharge port. In this way, the two screening mechanisms 7 can screen and recycle the materials discharged from the first discharge port and the second discharge port, respectively.

[0082] As a possible implementation, the side wall of the accommodating cavity 11 is arranged in a vertical direction relative to the bottom wall of the accommodating cavity 11; the radial dimension of the accommodating cavity 11 gradually increases in the vertical direction. That is to say, the radial dimension of the top of the accommodating cavity 11 is greater than that of the bottom of the accommodating cavity 11. In this way, the area of the top of the accommodating cavity 11 relative to the bottom side is large, which can make the liquid level float more separators after the separators and the pole pieces are layered, and is more conducive to the flow of the preset gas and the preset liquid.

[0083] The electric core separation device provided by the embodiment is applied to an electric core separation process, and the electric core includes separators and pole pieces. The electric core separation device includes a separation box, a gas supply unit, and a liquid supply unit. The separation box is provided with a feeding port and a first discharging port. The separation box has an accommodating cavity. The feeding port is arranged at the top of the accommodating cavity. The side wall of the accommodating cavity has a first opening and a second opening. The first opening forms the first discharging port. The first opening and the second opening are arranged on opposite side walls of the accommodating cavity in a horizontal direction. The accommodating cavity has a preset liquid. The preset liquid is configured to separate the separators and the pole pieces. The gas supply unit is arranged at the bottom of the separation box. The gas supply unit is configured to introduce a preset gas into the accommodating cavity in a vertical direction. The impact force of the preset gas acts on the separators and the pole pieces, so that the separators float on the liquid level of the preset liquid and the pole pieces sink at the bottom of the accommodating cavity. The liquid supply unit includes a first connecting pipe and a second connecting pipe. The first connecting pipe is in communication with the accommodating cavity. The first connecting pipe is configured to introduce the preset liquid into the accommodating cavity, so that the liquid level is flush with the first opening. The second connecting pipe is in communication with the accommodating cavity through the second opening. The second connecting pipe is configured to introduce the preset liquid into the accommodating cavity in the horizontal direction. The liquid power of the preset liquid drives the separators to move along the liquid level and be discharged from the first opening. Through such an arrangement, the separation efficiency of the separators and the pole pieces is improved, and separators and pole pieces with good integrity can be obtained.

[0084] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. in the description mean that the described embodiments can include, but not necessarily every embodiment include, a particular feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure or characteristic in connection with other embodiments whether explicitly described or not.

[0085] Generally, the terms should be understood at least partly by the context of use. For example, at least partly according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic of singular meaning, or can be used to describe a combination of features, structures or characteristics of plural meaning. Similarly, at least partly according to the context, terms such as "a" or "said" can be understood to convey singular usage or convey plural usage.

[0086] It should be readily understood that "on," "over," and "above" in the present application should be interpreted in the broadest manner such that "on" means not only "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "over" or "above" includes not only the meaning of "over" or "above" but also the meaning of "over" or "above" with no intervening features or layers therebetween (i.e., directly on).

[0087] In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0088] Finally, it should be noted that the above-described embodiments are merely intended for describing the technical solutions of the present application, but not to limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrode sheet separating apparatus applied to an electrode sheet separating process, the electrode sheet comprising a separator and a pole sheet, characterized by, The application relates to a separator for separating a diaphragm and a polar piece, and a method for separating a diaphragm and a polar piece. The separator comprises a separation box provided with a feeding port and a first discharging port, the separation box has a containing cavity, the feeding port is arranged at the top of the containing cavity, the side wall of the containing cavity is provided with a first opening and a second opening, the first opening forms the first discharging port, the first opening and the second opening are arranged on the opposite side walls of the containing cavity in a horizontal direction, the containing cavity is provided with preset liquid, and the preset liquid is configured to separate the diaphragm and the polar piece. A gas supply unit is arranged at the bottom of the separation box, and the gas supply unit is configured to supply preset gas into the containing cavity in a vertical direction, the impact force of the preset gas acts on the diaphragm and the polar piece, so that the diaphragm floats on the liquid surface of the preset liquid and the polar piece sinks at the bottom of the containing cavity. A liquid supply unit comprises a first connecting pipe and a second connecting pipe, the first connecting pipe is communicated with the containing cavity, the first connecting pipe is configured to supply the preset liquid into the containing cavity, so that the liquid surface is flush with the first opening, the second connecting pipe is communicated with the containing cavity through the second opening, and the second connecting pipe is configured to supply the preset liquid into the containing cavity in the horizontal direction, the liquid power of the preset liquid drives the diaphragm to move along the liquid surface and discharge from the first opening.

2. The cell separation apparatus of claim 1, wherein, The separator further comprises a transfer mechanism, the separation box is further provided with a second discharging port, the containing cavity is provided with a third opening to form the second discharging port, the third opening is communicated between the inside and the outside of the separation box, the height of the third opening in the vertical direction is higher than that of the first opening, and the third opening and the first opening are located on different side walls of the containing cavity. The transfer mechanism is arranged in the containing cavity, the transfer mechanism comprises a scraper, the scraper is abutted with the cavity wall of the containing cavity, and the scraper is arranged to move relative to the cavity wall of the containing cavity in the vertical direction, so as to drive the polar piece to move to the third opening and discharge from the third opening.

3. The cell separation apparatus of claim 2, wherein, The transfer mechanism comprises a conveying belt, the conveying belt is arranged relative to the cavity wall of the containing cavity, and the conveying belt moves relative to the cavity wall of the containing cavity in a clockwise or counterclockwise direction. The scraper is arranged on the conveying belt, and one side of the scraper, which is away from the conveying belt, is abutted with the cavity wall of the containing cavity.

4. The cell separation apparatus of claim 2, wherein, The containing cavity is provided with a fourth opening to form the second discharging port, the fourth opening is located at the bottom side of the containing cavity, and the fourth opening is arranged to be opened and closed relative to the containing cavity, so that when the fourth opening is opened relative to the containing cavity, the polar piece is discharged from the fourth opening.

5. The cell separation apparatus of any one of claims 1-4, wherein, The liquid supply unit further comprises a liquid storage tank and a circulating pump, the liquid storage tank is configured to store the preset liquid, the circulating pump has an input end and two output ends, the input end is connected with the liquid storage tank, one of the two output ends is connected with the first connecting pipe, and the other output end is connected with the second connecting pipe.

6. The cell separation apparatus of any one of claims 1-4, wherein, The air supply unit comprises a third connecting pipe and a fan, a first end of the third connecting pipe is in communication with the accommodating cavity, the fan is in communication with a second end of the third connecting pipe, and the fan is configured to introduce a preset gas into the third connecting pipe.

7. The cell separation apparatus of claim 6, wherein, At least one of the first end of the first connecting pipe and the first end of the third connecting pipe has a connecting end, the connecting end is trumpet-shaped, and a radial dimension of the connecting end on a side facing the accommodating cavity along the vertical direction is greater than a radial dimension of the connecting end on a side facing away from the accommodating cavity.

8. The cell separation apparatus of claim 7, wherein, The first connecting pipe has the connecting end, the first connecting pipe is arranged at the bottom of the separation tank, and the first end of the third connecting pipe is in communication with the first connecting pipe.

9. The cell separation apparatus of any of claims 2-4, wherein, Further comprising a screening mechanism, the screening mechanism is correspondingly arranged at least one of the first discharge port and the second discharge port; The screening mechanism comprises a housing and a separation sieve, the separation sieve is connected opposite to the first discharge port, the housing has an accommodating groove, the separation sieve is located in the accommodating groove, and a side of the accommodating groove facing away from the separation sieve is connected with the liquid supply unit.

10. The cell separation apparatus of claim 1, wherein, The separation tank further comprises a filter screen, the filter screen is correspondingly arranged at least one of the first opening and the second opening, and the filter screen is connected with a cavity wall of the accommodating cavity. The filter screen has filter holes, and a hole diameter of the filter holes is smaller than a width of the pole piece.

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