Battery cell recycling device and recycling method

Abstract

The present application provides a battery cell recycling device and recycling method. The recycling device includes: a reaction chamber having a plurality of liquid inlets and a plurality of liquid outlets; a support frame having a plurality of adjacently arranged placement portions, each placement portion being used to place the battery cell, and the support frame being arranged in the reaction chamber; and a stirring device for stirring the processing liquid in the reaction chamber. The battery cell recycling device and recycling method of the present application can simultaneously process a plurality of complete battery cells by accommodating a plurality of complete battery cells by the support frame, thereby improving the recycling efficiency of the battery cells.

Description

Technical Field

[0001] The present application mainly relates to the field of photovoltaic technology, and specifically to a cell recycling device and a recycling method. Background Art

[0002] Photovoltaic modules mainly include front glass, cells, encapsulation film, backplane, aluminum frame and junction box. The service life of photovoltaic modules is usually 25 years. After the service period, photovoltaic modules need to be recycled. The process of recycling photovoltaic modules mainly includes: removing the junction box, removing the aluminum frame, and separating the glass, cells and backplane. Among them, the recycling of cells is one of the key processes. The recycling of cells mainly includes separating metal aluminum, metal silver and non-metallic element silicon from the cells. Conventional technology mainly recycles broken cells, and it is difficult to process multiple intact cells at the same time, and the recycling efficiency is low.

[0003] Therefore, how to recycle multiple complete battery cells at the same time is an urgent problem to be solved. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a battery cell recycling device and recycling method, which can simultaneously recycle multiple complete battery cells, thereby improving the recycling efficiency.

[0005] The technical solution adopted by the present application to solve the above-mentioned technical problems is a battery cell recovery device, comprising: a reaction chamber, having a plurality of liquid inlets and a plurality of liquid outlets; a support frame, having a plurality of adjacently arranged placement portions, each of the placement portions being used to place the battery cell, the support frame being arranged in the reaction chamber; and a stirring device, being used to stir the processing liquid in the reaction chamber.

[0006] In one embodiment of the present application, the plurality of liquid inlets include a first liquid inlet, a second liquid inlet and a third liquid inlet, and the plurality of liquid outlets include a first liquid outlet, a second liquid outlet and a third liquid outlet, wherein the first liquid inlet, the second liquid inlet and the third liquid inlet are respectively used to provide an acidic treatment liquid, a neutral treatment liquid and an alkaline treatment liquid to the reaction chamber, and the first liquid outlet, the second liquid outlet and the third liquid outlet are respectively used to discharge the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid from the reaction chamber.

[0007] In one embodiment of the present application, the first liquid outlet, the second liquid outlet and the third liquid outlet are all disposed at the bottom of the reaction chamber.

[0008] In one embodiment of the present application, the support bracket includes a plurality of support rods extending along a first direction, each of the support rods is bent at the same position along the first direction to form a placement portion, wherein the plurality of placement portions are adjacently arranged along the first direction.

[0009] In one embodiment of the present application, the support bracket includes a first support rod, a second support rod, a third support rod and a fourth support rod, the first support rod and the fourth support rod are bent along the second direction and the third direction, the second support rod and the third support rod are bent along the second direction, wherein the battery cell is placed on the placement portion along the third direction.

[0010] In one embodiment of the present application, the cross-section of each of the support rods is circular.

[0011] In one embodiment of the present application, the stirring device includes a stirring rod and a stirring controller, and the stirring rod is used to perform circular motion around the support frame.

[0012] The present application also proposes a battery cell recycling method, which uses the recycling device as described above to recycle the battery cells, and the recycling method includes: placing the battery cells on the placement portion of the support bracket; placing the support bracket with the battery cells placed on it in the reaction chamber; providing treatment liquids corresponding to the several liquid inlets into the reaction chamber through the several liquid inlets, respectively, and discharging the treatment liquids corresponding to the several liquid outlets from the reaction chamber through the several liquid outlets, respectively; and after providing the treatment liquid into the reaction chamber, using the stirring device to stir the treatment liquid in the reaction chamber.

[0013] In one embodiment of the present application, the plurality of liquid inlets include a first liquid inlet, a second liquid inlet and a third liquid inlet, and the plurality of liquid outlets include a first liquid outlet, a second liquid outlet and a third liquid outlet, wherein an acidic treatment liquid, a neutral treatment liquid and an alkaline treatment liquid are provided to the reaction chamber through the first liquid inlet, the second liquid inlet and the third liquid inlet, respectively, and the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid are discharged from the reaction chamber through the first liquid outlet, the second liquid outlet and the third liquid outlet, respectively.

[0014] In one embodiment of the present application, the steps of: providing the processing liquid to the reaction chamber and discharging the processing liquid from the reaction chamber are performed alternately.

[0015] The battery cell recycling device and recycling method of the present application can accommodate multiple complete battery cells through a support bracket, and can process multiple complete battery cells at the same time, thereby improving the recycling efficiency of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1It is a three-dimensional schematic diagram of a battery cell recycling device according to an embodiment of the present application;

[0018] Figure 2 and Figure 3 They are Figure 1 Enlarged schematic diagrams of different local structures;

[0019] Figure 4 yes Figure 1 A schematic cross-sectional view of a recovery device;

[0020] Figure 5 This is an exemplary flow chart of a battery cell recycling method according to an embodiment of the present application.

[0021] Reference numerals

[0022] Reaction chamber 110 Support frame 120 Third support rod 122c

[0023] First liquid inlet 111 Placement portion 121 Fourth support rod 122d

[0024] Second liquid inlet 112 First bending portion 121a Stirring device 130

[0025] The third liquid inlet 113 The second bent portion 121b The stirring rod 131

[0026] First liquid outlet 114 Third bending portion 121c Stirring controller 132

[0027] Second liquid outlet 115 Fourth bent portion 121d Cover portion 140

[0028] The third liquid outlet 116 The first support rod 122a

[0029] Bottom 117 Second support rod 122b DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and therefore the present application is not limited to the specific embodiments disclosed below.

[0032] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0033] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0034] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0035] Next, the battery cell recycling device and recycling method of the present application are described through specific embodiments.

[0036] Figure 1 1 is a three-dimensional schematic diagram of a battery cell recycling device according to an embodiment. Figure 1 As shown, the recovery device includes a reaction chamber 110, a support frame 120 and a stirring device 130. The support frame 120 is disposed in the reaction chamber 110, and the stirring device 130 can be used to stir the processing liquid in the reaction chamber 110.

[0037] Specifically, Figure 1 The reaction chamber 110 is a cylinder, and has a cavity for accommodating the support frame 120 and the processing liquid. The reaction chamber 110 has a first liquid inlet 111, a second liquid inlet 112, and a third liquid inlet 113, as well as a first liquid outlet 114, a second liquid outlet 115, and a third liquid outlet 116. Figure 1 The liquid inlet and the liquid outlet are pipelines connected to the reaction chamber 110 . In some other embodiments, the liquid inlet and the liquid outlet may be openings on the reaction chamber 110 .

[0038] The first liquid inlet 111, the second liquid inlet 112 and the third liquid inlet 113 are arranged at positions of the reaction chamber 110 higher than the support frame 120 along the first direction D1. In this way, it can be ensured that the processing liquid entering the reaction chamber 110 through the liquid inlet can immerse the support frame 120, and the battery cell 10 placed in the support frame 120 is prevented from being not completely immersed in the processing liquid.

[0039] The first liquid outlet 114, the second liquid outlet 115 and the third liquid outlet 116 are all disposed at the bottom 117 of the reaction chamber 110. Thus, when the liquid outlet is used to discharge the processing liquid in the reaction chamber 110, it is beneficial to completely discharge the processing liquid in the reaction chamber 110, and avoid the residual processing liquid from affecting the next process step.

[0040] exist Figure 1 In the embodiment of the present invention, the first liquid inlet 111, the second liquid inlet 112 and the third liquid inlet 113 are respectively used to provide an acidic treatment liquid, a neutral treatment liquid and an alkaline treatment liquid to the reaction chamber 110, and the first liquid outlet 114, the second liquid outlet 115 and the third liquid outlet 116 are respectively used to discharge the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid from the reaction chamber 110. Providing different liquid inlets for different treatment liquids is conducive to avoiding contamination between the treatment liquids. In addition, the reaction chamber has a plurality of liquid inlets, and the treatment liquids required for different processes can be provided to the reaction chamber through different liquid inlets. In the process of recycling the battery cells, there is no need to transfer the battery cells to different reaction chambers according to the different treatment liquids. This omits the step of transferring the battery cells in the process of recycling the battery cells, thereby improving the recycling efficiency.

[0041] refer to Figure 1 As shown, in one embodiment, the recovery device further includes a cover 140. The cover 140 is used to cover the opening of the reaction chamber 110 to prevent the processing liquid in the reaction chamber 110 from overflowing.

[0042] Figure 2 and Figure 3 They are Figure 1 The enlarged schematic diagram of the local structures A and B in the figure. Figure 4 yes Figure 1 The schematic cross-sectional view of the recovery device in FIG. 1 shows the structure of the recovery device on a plane perpendicular to the axis of the reaction chamber 110. Figures 1 to 4 As shown, the support bracket 120 has four placement portions 121 arranged adjacent to each other along the first direction D1 , and a corresponding battery cell 10 is placed on each placement portion 121 .

[0043] Specifically, refer to Figure 1 As shown, the support bracket 120 has a first support rod 122a, a second support rod 122b, a third support rod 122c and a fourth support rod 122d extending along the first direction D1. Figure 1 and Figure 4 As shown, the first support rod 122a, the second support rod 122b, the third support rod 122c and the fourth support rod 122d are respectively distributed at the four vertices of the rectangle C. It should be noted that the rectangle C is used to illustrate the relative position relationship between the support rods, and is not a physical structure. It should be understood that the number of support rods in the support bracket 120 is not limited to Figure 4 The four roots in Figure 4 On the basis of the first support rod 122a and the second support rod 122b, one or more support rods can be added along the third direction D3 between the first support rod 122a and the second support rod 122b; one or more support rods can also be added along the second direction D2 between the second support rod 122b and the third support rod 122c; the number of support rods can also be reduced. For example, in some embodiments, Figure 4 On the basis of , one support rod is reduced. At this time, the three support rods are respectively distributed at the three vertices of the triangle.

[0044] also, Figure 4 The positional relationship between the four support rods is not limited to being distributed at the four vertices of a rectangle. For example, the four support rods can also be distributed at the four vertices of any quadrilateral such as a parallelogram, a body, a rhombus, etc.

[0045] refer to Figures 1 to 4 As shown, the first support rod 122a, the second support rod 122b, the third support rod 122c and the fourth support rod 122d are bent at the same position along the first direction D1 to form a placement portion 121. Figure 1 and Figure 4 As shown, the first support rod 122a forms four first bending portions 121a arranged adjacent to each other in sequence along the first direction D1, similarly, the second support rod 122b forms four second bending portions 121b arranged adjacent to each other in sequence along the first direction D1, the third support rod 122c forms four third bending portions 121c arranged adjacent to each other in sequence along the first direction D1, and the fourth support rod 122d forms four fourth bending portions 121d arranged adjacent to each other in sequence along the first direction D1. Figure 1 As shown in FIG. 1 , the four bends of each support rod correspond to the four bends of the remaining three support rods in height along the first direction D1. In this way, the four bends from the four support rods are located at the same height in the first direction D1, forming a structure as shown in FIG. Figure 4 A placement portion 121 shown, 4 as Figure 4 The placement portions 121 are shown to be arranged adjacent to each other in sequence along the first direction D1. It should be understood that the number of the placement portions 121 is not limited to Figure 1 The number of the placement sections 121 can be set according to the requirements. For example, when multiple battery cells need to be processed simultaneously, the number of the placement sections 121 can be increased, for example, the number of the placement sections 121 can be 5, 10 or 15.

[0046] refer to Figure 2 As shown, Figure 2 FIG. 1 shows a three-dimensional schematic diagram of a first bending portion 121a of the first support rod 122a. Figure 2 and Figure 4 As shown, the first support rod 122a is bent along the second direction D2 and the third direction D3, and forms a receiving space S1 in the first direction D1, and the battery cell 10 can be placed in the receiving space S1. The size of the first bent portion 121a along the second direction D2 is L1, and the size along the third direction D3 is L2. The maximum size of the battery cell that can be placed in the placement portion 121 can be adjusted by changing the size L1 and the size L2. Figure 4 In the embodiment, the placement portion 121 can place battery cells of various sizes, such as a battery cell 12 with a smaller size and a battery cell 11 with a larger size. Figure 2 The first bending portion 121a is similar to the first bending portion 121a in the embodiment, and will not be described in detail. In some embodiments, the size L1 and the size L2 are any values ​​between 47 mm and 60 mm. The size of the accommodation space S1 along the first direction D1 is 1 to 10 mm.

[0047] refer to Figure 1 As shown, the fourth support rod 122d is bent along the second direction D2 and the third direction D3 to form a fourth bending portion similar to the first bending portion. For this, reference may be made to the description of the first bending portion, which will not be elaborated here.

[0048] refer to Figure 3 As shown, Figure 3 A second bent portion 121b of the second support rod 122b is shown. Figure 3 and Figure 4 As shown, the second support rod 122b is bent along the second direction D2, and forms a receiving space S2 in the first direction D1, and the battery cell 10 can be placed in the receiving space S2. The size of the second bent portion 121b along the second direction D2 is L3, and the maximum size of the battery cell that can be placed in the placement portion 121 can be adjusted by changing the size L3. The size L3 can be the same as the size L1 and / or the size L2, or it can be different.

[0049] refer to Figure 1 As shown, the third support rod 122c is bent along the second direction D2 to form a third bent portion similar to the second bent portion. For this, reference may be made to the description of the second bent portion, which will not be elaborated here.

[0050] refer to Figures 1 to 4As shown, the battery cell 10 is placed in the accommodation space of the bent parts at the same height, and the four corners of the battery cell 10 are supported by the corresponding bent parts. In this way, the battery cell 10 can be stably placed in the support bracket 120.

[0051] In one embodiment, the cross section of each support rod is circular. In this way, the contact area between the bent portion of the support rod and the battery cell can be reduced, thereby increasing the contact area between the battery cell and the processing liquid, and promoting the complete reaction of the battery cell. In some embodiments, the cross section of the support rod is 2 mm 2 round shape.

[0052] refer to Figure 1 As shown, in one embodiment, the reaction chamber 110 is a cylindrical container with an inner cavity diameter of 400 mm and a height of 600 mm. The first liquid inlet 111 is used to provide an acidic treatment liquid to the reaction chamber 110, the second liquid inlet 112 is used to provide a neutral treatment liquid to the reaction chamber 110, the third liquid inlet 113 is used to provide an alkaline treatment liquid to the reaction chamber 110, the first liquid outlet 114 is used to discharge the acidic treatment liquid in the reaction chamber 110, the second liquid outlet 115 is used to discharge the neutral treatment liquid in the reaction chamber 110, and the third liquid outlet 116 is used to discharge the alkaline treatment liquid in the reaction chamber 110. The shape and size of the liquid inlet and the liquid outlet can be set according to requirements. For example, in some embodiments, the liquid inlet and the liquid outlet are circular holes with a diameter of 50 mm.

[0053] refer to Figure 1 and Figure 4 As shown, the support bracket 120 is made of a material that is resistant to strong acids and alkalis, so that the corrosion of the support bracket 120 by the treatment liquid can be avoided. Four battery cells 10 are placed in the placement portion in sequence along the first direction D1. There is a certain distance between adjacent battery cells 10, so that the fluidity of the treatment liquid can be ensured and the uniformity of the treatment liquid can be improved. In addition, multiple complete battery cells can be placed in the support bracket 120, so that multiple complete battery cells can be processed at the same time, thereby improving the recycling efficiency. It should be noted that the support bracket 120 of the present application can also be used to place diced battery cells, such as two-pieces and three-pieces. The size of the two-piece and three-piece can be adapted by changing the size of the placement portion of the support bracket 120.

[0054] Back to Figure 1 As shown, the stirring device 130 includes a stirring rod 131 and a stirring controller 132. The stirring rod 131 is L-shaped, one end of which is disposed on the cover 140, and the other end extends toward the bottom 117 along the first direction D1. The stirring rod 131 can make a circular motion around the support frame 120. The stirring controller 132 can control the rotation speed and rotation direction of the stirring rod 131. After the treatment liquid is provided into the reaction chamber 110, the treatment liquid can be stirred by the stirring device 130, so that the uniformity of the treatment liquid can be improved.

[0055] The recycling device in the above-mentioned embodiment of the present application can accommodate multiple complete battery cells through the support bracket, and can process multiple complete battery cells at the same time, thereby improving the recycling efficiency of the battery cells.

[0056] On the other hand, the present application also proposes a method for recycling battery cells. Figure 5 is an exemplary flow chart of a battery cell recycling method according to an embodiment. Figure 5 As shown, the recycling method of this embodiment uses the recycling device as described above to recycle the battery cells, and the recycling method includes the following steps:

[0057] Step S210: placing the battery cell on the placement portion of the support frame;

[0058] Step S220: placing the support frame with the battery cells in the reaction chamber;

[0059] Step S230: providing treatment liquids corresponding to the plurality of liquid inlets into the reaction chamber through the plurality of liquid inlets, and discharging the treatment liquids corresponding to the plurality of liquid outlets in the reaction chamber through the plurality of liquid outlets;

[0060] Step S240: After providing the processing liquid into the reaction chamber, a stirring device is used to stir the processing liquid in the reaction chamber.

[0061] The above-mentioned steps S210 to S240 are described in detail below.

[0062] refer to Figure 1 As shown, in step S210, four battery cells 10 are placed on the placement portion of the support bracket 120. The four battery cells 10 in the support bracket 120 are arranged adjacent to each other in sequence along the first direction D1.

[0063] In step S220, the support bracket 120 with the battery cell 10 is placed in the reaction chamber 110. In some embodiments, after the support bracket 120 is placed in the reaction chamber 110, the top opening of the reaction chamber 110 is covered with a cover 140.

[0064] In step S230, the reaction chamber 110 has three liquid inlets: a first liquid inlet 111, a second liquid inlet 112, and a third liquid inlet 113, and three liquid outlets: a first liquid outlet 114, a second liquid outlet 115, and a third liquid outlet 116. The treatment liquid corresponding to the liquid inlet can be provided to the reaction chamber 110 through the liquid inlet, and the treatment liquid corresponding to the liquid outlet can be discharged from the reaction chamber 110 through the liquid outlet. In other words, there is a one-to-one correspondence between the liquid inlet and the treatment liquid, and similarly, there is a one-to-one correspondence between the liquid outlet and the treatment liquid.

[0065] For example, refer to Figure 1As shown, in step S230, the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid can be provided to the reaction chamber 110 through the first liquid inlet 111, the second liquid inlet 112 and the third liquid inlet 113 respectively; the used acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid can also be discharged from the reaction chamber 110 through the first liquid outlet 114, the second liquid outlet 115 and the third liquid outlet 116 respectively.

[0066] In step S240, after the treatment liquid is provided into the reaction chamber 110, the treatment liquid in the reaction chamber 110 is stirred by using the stirring device 130. This is beneficial to promoting the reaction between the treatment liquid and the battery cell, and is beneficial to improving the uniformity of the treatment liquid.

[0067] In one embodiment, the following steps are used to provide the processing liquid to the reaction chamber and to discharge the processing liquid in the reaction chamber.

[0068] Step 1: providing an acidic treatment liquid to the reaction chamber 110 through the first liquid inlet 111;

[0069] Step 2: After the acidic treatment liquid reacts with the battery cell 10 for a first period of time, the acidic treatment liquid in the reaction chamber 110 is discharged through the first liquid outlet 114;

[0070] Step 3: providing a neutral treatment liquid to the reaction chamber 110 through the second liquid inlet 112, wherein the neutral treatment liquid may be deionized water;

[0071] Step 4: After the second time period, the neutral processing liquid in the reaction chamber 110 is discharged through the second liquid outlet 115;

[0072] Step 5: providing an alkaline treatment solution to the reaction chamber 110 through the third liquid inlet 113;

[0073] Step 6: After the third period of time, the alkaline treatment liquid in the reaction chamber 110 is discharged through the third liquid outlet 116 .

[0074] In short, in step 1 to step 6, the treatment liquid is provided to the reaction chamber and the treatment liquid in the reaction chamber is discharged by alternately performing the step of providing the treatment liquid and the step of discharging the treatment liquid. The reaction chamber has a plurality of liquid inlets and liquid outlets. The step of alternately performing the step of providing the treatment liquid and the step of discharging the treatment liquid has the advantage of not needing to transfer the battery cells to different reaction chambers according to the different treatment liquids, which omits the step of transferring the battery cells in the process of recycling the battery cells and improves the recycling efficiency.

[0075] To more clearly understand the recycling method of the present application, a non-limiting example is given.

[0076] refer to Figure 1As shown, the support bracket 120 with the battery cell 10 is placed in the reaction chamber 110. The first acidic treatment liquid is provided to the reaction chamber 11 through the first liquid inlet 111, and the first acidic treatment liquid immerses the top of the support bracket 120. The first acidic treatment liquid is stirred using the stirring device 130 to promote the reaction between the battery cell 10 and the first acidic treatment liquid. The first acidic treatment liquid can react with the metal aluminum in the battery cell.

[0077] After the battery cell and the first acidic treatment liquid react for a period of time, the stirring is stopped. The first liquid outlet 114 is opened, and the first acidic treatment liquid after reacting with the battery cell 10 is discharged through the first liquid outlet 114. After the first acidic treatment liquid is discharged, the first liquid outlet 114 is closed, and then the second liquid inlet 112 is opened, and a neutral treatment liquid is provided to the reaction chamber 110 through the second liquid inlet 112. The neutral treatment liquid is deionized water, and the deionized water can clean the first acidic treatment liquid remaining on the surface of the battery cell. After the cleaning is completed, the second liquid outlet 115 is opened to discharge the deionized water in the reaction chamber 110.

[0078] After the battery cell is dried, the metal aluminum on the surface of the battery cell is completely removed. The first liquid inlet 111 is opened again to provide the second acidic treatment liquid to the reaction chamber 110. The stirring device 130 is used to stir the second acidic treatment liquid to promote the reaction between the battery cell 10 and the second acidic treatment liquid.

[0079] After the battery cell and the second acidic treatment liquid react for a period of time, the stirring is stopped, and the first liquid outlet 114 is opened to discharge the second acidic treatment liquid after the reaction. After the second acidic treatment liquid is discharged, the first liquid outlet 114 is closed, and then the second liquid inlet 112 is opened to provide a neutral treatment liquid to the reaction chamber 110 through the second liquid inlet 112. The neutral treatment liquid is deionized water. The deionized water can clean the second acidic treatment liquid remaining on the surface of the battery cell. After the cleaning is completed, the second liquid outlet 115 is opened to discharge the deionized water in the reaction chamber 110. The second acidic treatment liquid can remove the metallic silver in the battery cell.

[0080] The first alkaline treatment liquid is provided into the reaction chamber 110 through the third liquid inlet 113 , and the stirring device 130 is turned on and used to stir the first alkaline treatment liquid to promote the reaction between the battery cell 10 and the first alkaline treatment liquid.

[0081] After the battery cell and the first alkaline treatment solution react for a period of time, the stirring is stopped, and the third liquid outlet 116 is opened to discharge the first alkaline treatment solution in the reaction chamber 110. Then, the third liquid outlet 116 is closed, and the second liquid inlet 112 is opened to provide deionized water into the reaction chamber 110 to clean the first alkaline treatment solution remaining on the battery cell. Subsequently, the second liquid outlet 115 is opened to discharge the deionized water. The first alkaline treatment solution can remove the aluminum-silicon alloy in the battery cell.

[0082] The third acidic treatment liquid is provided into the reaction chamber 110 through the first liquid inlet 111 , and the stirring device 130 is turned on to stir the third acidic treatment liquid to promote the reaction between the battery cell 10 and the third acidic treatment liquid.

[0083] After a certain reaction time, stirring is stopped, and the third acidic treatment liquid in the reaction chamber 110 is discharged through the first liquid outlet 114. Deionized water is then provided to the reaction chamber 110 through the second liquid inlet 112, and the third acidic treatment liquid remaining on the cell 10 is washed with deionized water; then, the deionized water is discharged through the second liquid outlet 115. The third acidic treatment liquid can remove the silicon nitride anti-reflection layer in the cell 10.

[0084] The second alkaline treatment liquid is provided into the reaction chamber 110 through the third liquid inlet 113 , and the stirring device 130 is turned on to stir the second alkaline treatment liquid to promote the reaction between the battery cell 10 and the second alkaline treatment liquid.

[0085] After the cell and the second alkaline treatment solution react for a period of time, stirring is stopped, and the third liquid outlet 116 is opened to discharge the second alkaline treatment solution in the reaction chamber 110. The third liquid outlet 116 is then closed, and the second liquid inlet 112 is opened to provide deionized water into the reaction chamber 110 to clean the second alkaline treatment solution remaining on the cell. Subsequently, the second liquid outlet 115 is opened to discharge the deionized water. The second alkaline treatment solution can remove the phosphorus diffusion layer in the cell.

[0086] The fourth acidic treatment liquid is provided into the reaction chamber 110 through the third liquid inlet 113 , and the stirring device 130 is turned on to stir the fourth acidic treatment liquid to promote the reaction between the battery cell 10 and the fourth acidic treatment liquid.

[0087] After the battery cell reacts with the fourth acidic treatment liquid for a period of time, stirring is stopped and the first liquid outlet 114 is opened to discharge the fourth acidic treatment liquid in the reaction chamber 110. Thereafter, the first liquid outlet 114 is closed, and the second liquid inlet 112 is opened to provide deionized water into the reaction chamber 110 to clean the fourth acidic treatment liquid remaining on the battery cell. Subsequently, the second liquid outlet 115 is opened to discharge the deionized water. The fourth acidic treatment liquid can remove metal impurities and the like on the surface of the battery cell 10. It should be noted that the steps for processing the battery cell are not limited to the above examples, and process steps can be added or reduced on the basis of the above examples.

[0088] The recycling method in the above-mentioned embodiment of the present application uses a support bracket to accommodate multiple complete battery cells, and multiple complete battery cells can be processed at the same time, thereby improving the recycling efficiency of the battery cells.

[0089] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0090] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0091] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

Claims

1. A battery cell recycling device, characterized in that: include: A reaction chamber having a plurality of liquid inlets and a plurality of liquid outlets; A support bracket having a plurality of placement portions, each of which is used to place the battery sheet, the support bracket being arranged in the reaction chamber, the support bracket comprising a plurality of support rods extending along a first direction, each of which is bent at the same position along the first direction to form the placement portion, and the plurality of placement portions being arranged adjacent to each other along the first direction; as well as A stirring device for stirring the processing liquid in the reaction chamber, wherein the support frame includes a first support rod, a second support rod, a third support rod and a fourth support rod, the first support rod and the fourth support rod are both bent along the second direction and the third direction and form a receiving space in the first direction, the second support rod and the third support rod are both bent along the second direction and form a receiving space in the first direction, the receiving space constitutes a placement portion, the battery cell is placed on the placement portion along the third direction, the second direction is perpendicular to the third direction, and the second direction and the third direction are parallel to the plane where the battery cell is located.

2. The recovery device according to claim 1, characterized in that: The plurality of liquid inlets include a first liquid inlet, a second liquid inlet and a third liquid inlet, and the plurality of liquid outlets include a first liquid outlet, a second liquid outlet and a third liquid outlet, wherein the first liquid inlet, the second liquid inlet and the third liquid inlet are respectively used to provide an acidic treatment liquid, a neutral treatment liquid and an alkaline treatment liquid to the reaction chamber, and the first liquid outlet, the second liquid outlet and the third liquid outlet are respectively used to discharge the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid from the reaction chamber.

3. The recovery device according to claim 2, characterized in that: The first liquid outlet, the second liquid outlet and the third liquid outlet are all arranged at the bottom of the reaction chamber.

4. The recovery device according to claim 1, characterized in that: The cross section of each support rod is circular.

5. The recovery device according to claim 1, characterized in that: The stirring device comprises a stirring rod and a stirring controller, and the stirring rod is used to perform a circular motion around the supporting frame.

6. A battery cell recycling method, characterized in that: The battery cell is recycled using the recycling device according to any one of claims 1 to 5, wherein the recycling method comprises: Placing the battery cell on the placement portion of the support bracket; Placing a support frame with battery cells placed thereon in the reaction chamber; Providing treatment liquids corresponding to the plurality of liquid inlets into the reaction chamber through the plurality of liquid inlets, respectively, and discharging treatment liquids corresponding to the plurality of liquid outlets from the reaction chamber through the plurality of liquid outlets, respectively; and After the processing liquid is provided into the reaction chamber, the processing liquid in the reaction chamber is stirred using the stirring device.

7. The recycling method according to claim 6, characterized in that: The plurality of liquid inlets include a first liquid inlet, a second liquid inlet and a third liquid inlet, and the plurality of liquid outlets include a first liquid outlet, a second liquid outlet and a third liquid outlet, wherein an acidic treatment liquid, a neutral treatment liquid and an alkaline treatment liquid are provided to the reaction chamber through the first liquid inlet, the second liquid inlet and the third liquid inlet, respectively, and the acidic treatment liquid, the neutral treatment liquid and the alkaline treatment liquid are discharged from the reaction chamber through the first liquid outlet, the second liquid outlet and the third liquid outlet, respectively.

8. The recycling method according to claim 6, characterized in that: The steps of supplying the process liquid to the reaction chamber and exhausting the process liquid from the reaction chamber are performed alternately.

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