Battery cell disassembly device and battery cell disassembly method

Abstract

The present invention provides a cell splitting device and a cell splitting method, which relate to the field of battery recycling. The cell splitting device comprises: a conveyor belt, a cutting piece and a roll-splitting piece. The conveyor belt is used to convey the cells to facilitate the streamlined input of the cells. The cutting piece is used to cut the cells. The bending piece is used to bend and break up the cells after cutting. The roll-splitting piece is used to separate the diaphragm and the pole piece in the cells after bending and breaking up. The cutting piece, the bending piece and the roll-splitting piece are arranged in sequence along the conveying direction of the conveyor belt, so as to carry out orderly splitting operation on the cells on the conveyor belt and improve the processing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of battery recycling, and in particular to a battery cell disassembly device and a battery cell disassembly method. Background Art

[0002] Currently, most of the power batteries for new energy vehicles use wound cells. The multi-layer structure inside the wound cells makes it difficult to completely separate the various components using existing equipment and processes.

[0003] Existing devices usually use robots for disassembly, and a pair of robots can only disassemble one battery cell at a time, resulting in low processing efficiency. Summary of the invention

[0004] The present invention provides a battery cell disassembly device and a battery cell disassembly method, which can perform a streamlined disassembly operation on battery cells to be disassembled, thereby improving processing efficiency.

[0005] The solution of the present invention can be achieved as follows:

[0006] A battery cell splitting device, comprising:

[0007] A conveyor belt and a cutting piece, a bending piece and a roll-splitting piece arranged in sequence along the conveying direction of the conveyor belt;

[0008] Among them, the conveyor belt is used to convey the battery cells, the cutting piece is used to cut the battery cells, the bending piece is used to bend and break up the cut battery cells, and the roll separation piece is used to separate the diaphragm and the electrode piece in the bent and broken up battery cells.

[0009] Optionally, the cutting piece includes a side cutting piece and a film cutting piece which are arranged in sequence along the conveying direction of the conveyor belt, and the side cutting piece and the film cutting piece are both located above the conveyor belt. The side cutting piece is used to cut the side of the battery cell, and the film cutting piece is used to cut the top surface of the battery cell.

[0010] Optionally, the film cutting component includes a film cutting linear module and a cutting head connected to each other, the film cutting linear module is located above the conveyor belt, and the film cutting linear module is used to drive the cutting head to move.

[0011] Optionally, the side cutting member includes a side cutting driver and a side cutting slice connected to each other, wherein the side cutting driver and the side cutting slice are both located above the conveyor belt, and the side cutting driver is used to drive the side cutting slice to rotate.

[0012] Optionally, the bending member includes a suspended roller and an extrusion roller, both of which are located above the conveyor belt, there is a gap between the bottom end of the suspended roller and the conveyor belt, the bottom end of the extrusion roller contacts the conveyor belt, and the extrusion roller is used to extrude the passing battery cells to bend the battery cells.

[0013] Optionally, the roll-splitting device includes a roll-splitting shell, an insertion shaft, a roll-splitting linear module, an adsorption block and a film-splitting rod, the insertion shaft and the film-splitting rod are both connected to the roll-splitting shell, and the adsorption block is connected to the roll-splitting linear module; the insertion shaft is used to be inserted into the interior of the battery cell, the adsorption block is used to adsorb the diaphragm, and the roll-splitting linear module is used to drive the adsorption block to move so that the diaphragm contacts and turns the film-splitting rod.

[0014] Optionally, the roll-splitting member also includes a winder, which includes a winder rod and a winder drive, both of which are connected to the roll-splitting shell. There are two winder rods, which are respectively located on both sides of the diaphragm after contacting the film-splitting rod. The winder drive is used to drive the winder rod to rotate.

[0015] Optionally, the battery cell splitting device also includes a first pushing piece, which is located above the conveyor belt, and the pushing direction of the first pushing piece is perpendicular to the extension direction of the conveyor belt, and the first pushing piece is used to push the battery cell onto the conveyor belt and close to one side of the cutting piece.

[0016] Optionally, the battery cell splitting device also includes a second pushing member, which is located above the conveyor belt, and the pushing direction of the second pushing member is perpendicular to the extension direction of the conveyor belt, and the second pushing member is used to push the battery cell from the conveyor belt to the winding member.

[0017] The solution of the present invention also provides a cell splitting method for a cell splitting device, the cell splitting method comprising:

[0018] Cutting the battery cells;

[0019] Bend and break up the cut cells;

[0020] Separate the diaphragm and electrode in the bent and broken battery cell.

[0021] The beneficial effects of the battery cell splitting device and the battery cell splitting method according to the embodiments of the present invention include, for example:

[0022] The battery cell splitting device comprises: a conveyor belt and cutting pieces, bending pieces and winding pieces arranged in sequence along the conveying direction of the conveyor belt, the conveyor belt is used to transport the battery cells to facilitate the streamlined input of the battery cells, the cutting pieces are used to cut the battery cells, the bending pieces are used to bend and break up the cut battery cells, and the winding pieces are used to separate the diaphragms and pole pieces in the bent and broken up battery cells, by sequentially arranging the separators, bending pieces and winding pieces and carrying out orderly winding operations on the battery cells, the streamlined winding processing of the battery cells can be realized, thereby improving the battery recycling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a battery cell splitting device provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the working of the side cutting piece provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the working state of the film cutting member provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the working state of the bending member provided in an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the operation of the roll splitting device provided in an embodiment of the present invention.

[0029] Icons: 100-battery cell splitting device; 110-base; 120-conveyor belt; 130-cutting piece; 131-side cutting piece; 1311-side cutting drive; 1312-side cutting slice; 132-film cutting piece; 1321-film cutting linear module; 1322-cutting head; 140-bending piece; 141-suspended roller; 142-extrusion roller; 150-rolling piece; 151-rolling shell; 152-insertion shaft; 153-rolling linear module; 154-adsorption block; 155-film separating rod; 156-winder; 1561-winding rod; 1562-winding drive; 160-first pushing piece; 170-second pushing piece; 190-battery cell; 191-diaphragm; 192-pole piece. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0036] At present, most of the power batteries of new energy vehicles use wound cells. The multi-layer structure inside the wound cell makes it difficult to completely separate the various components in the existing process. One current battery recycling process is to cut the battery shell to take out the internal cell, crush the entire cell and then separate them according to the properties of each material, but the different components cannot be separated with high purity, and the resulting recycled materials have a high impurity content, which causes great trouble for the reuse of the cell materials. Another process is to pyrolyze the entire battery, decompose the organic matter such as the electrolyte and the diaphragm, and then crush the resulting product and sort it, but the internal materials of the battery are prone to thermal runaway after high-temperature treatment, making it difficult to control the pyrolysis temperature.

[0037] The prior art proposes equipment that automatically disassembles the battery cell to separate the positive and negative plates and then recycle them separately. One of them can separate and collect the different components of the battery cell separately, but this method takes a long time to process before rewinding, and can only disassemble one battery cell at a time, which cannot meet the requirements of mass production; the other uses an air gun to blow the battery cell belt apart and then clamp it separately to achieve the separate recycling of the battery cell components, but this equipment uses two manipulators, which is difficult to maintain and costly. Four winding rollers are used in the disassembly part, and the guiding suction cup needs to be operated 4 times in one process, which has low processing efficiency. In addition, the position of the battery cell belt when the battery cell is placed vertically has great uncertainty, and whether the guiding suction cup can guide correctly remains to be verified.

[0038] In addition, the battery cell structure is a four-layer structure of diaphragm-negative electrode sheet-diaphragm-positive electrode sheet. The outermost layer has multiple layers of diaphragm wound around it, and is sealed with tape at the end.

[0039] The battery cell splitting device and battery cell splitting method provided in the embodiments of the present invention can solve this problem.

[0040] Please refer to Figure 1-Figure 5 , this embodiment provides a battery cell splitting device 100 and a battery cell splitting method, which will be described in detail below.

[0041] refer to Figure 1 The battery cell splitting device 100 includes: a base 110, a conveyor belt 120, a cutting piece 130, a bending piece 140 and a roll-splitting piece 150; the conveyor belt 120 is connected to the base 110 and is used to convey the battery cell 190; the cutting piece 130 is simultaneously located above the base 110 and the conveyor belt 120, and the cutting piece 130 is used to cut the battery cell 190; the bending piece 140 is connected to the base 110 and is located above the conveyor belt 120, and the bending piece 140 is used to bend and break up the cut battery cell 190; the roll-splitting piece 150 is connected to the base 110 and is used to separate the diaphragm 191 and the pole piece 192 in the battery cell 190 that has been bent and broken up; wherein the cutting piece 130, the bending piece 140 and the roll-splitting piece 150 are arranged in sequence along the conveying direction of the conveyor belt 120.

[0042] In the above technical scheme, the base 110 is used to support and fix the entire device, the conveyor belt 120 plays the role of streamlined conveying of the battery cells 190, and the cutting parts 130, bending parts 140 and winding parts 150 are arranged in sequence along the conveyor belt 120, so as to orderly cut, bend and break up the streamlined conveyed battery cells 190, and separate the diaphragm 191 and the electrode 192, thereby improving the processing efficiency.

[0043] refer to Figure 1The cutting piece 130 includes a side cutting piece 131 and a film cutting piece 132 which are sequentially arranged along the conveying direction of the conveyor belt 120. The side cutting piece 131 and the film cutting piece 132 are both connected to the base 110 and are located above the conveyor belt 120. The side cutting piece 131 is used to cut the side of the battery cell 190, and the film cutting piece 132 is used to cut the top surface of the battery cell 190.

[0044] In the above technical solution, the side cutting piece 131 is used to cut the side of the battery cell 190 to facilitate the exposure of its internal layered structure, so as to prepare for the subsequent contact between the roll-splitting piece 150 and the battery cell 190. The film cutting piece 132 cuts the top surface of the battery cell 190 to reduce the limiting effect of the outer shell of the battery cell 190 on the internal diaphragm 191 and the pole piece 192.

[0045] refer to Figure 1 The battery cell splitting device 100 also includes a first pusher 160, which is connected to the base 110 and is located above the conveyor belt 120. The pushing direction of the first pusher 160 is perpendicular to the extension direction of the conveyor belt 120, and is used to push the battery cell 190 onto the conveyor belt 120 and close to one side of the cutting piece 130.

[0046] The first pusher 160 is disposed in front of the side cutting member 131 and the film cutting member 132. When the battery cells 190 enter the conveyor belt 120, the lateral positions of the battery cells 190 on the conveyor belt 120 are relatively chaotic. At this time, the first pusher 160 can push all the battery cells 190 to the side of the conveyor belt 120 close to the side cutting member 131 to ensure the accuracy of the side cutting position.

[0047] refer to Figure 1 The battery cell splitting device 100 also includes a second pushing member 170, which is connected to the base 110 and is located above the conveyor belt 120. The pushing direction of the second pushing member 170 is perpendicular to the extension direction of the conveyor belt 120. The second pushing member 170 is used to push the battery cell 190 from the conveyor belt 120 to the roll-splitting member 150.

[0048] Furthermore, the multi-component coiling member 150 and the second pushing member 170 can be provided to match the flow conveying speed of the conveyor belt 120. Compared with the traditional manipulator structure, the operating efficiency can be improved while the use cost can be greatly reduced.

[0049] In addition, the first pusher 160 and the second pusher 170 both include a pusher portion (not shown) in contact with the battery cell 190 and a pusher drive member (not shown), wherein the pusher drive member is used to provide linear motion power to the pusher portion, and the pusher drive member can be a cylinder, a hydraulic cylinder or a linear electric cylinder.

[0050] refer to Figure 2The side cutting member 131 includes a side cutting driver 1311 and a side cutting slice 1312 connected to each other. The side cutting driver 1311 is connected to the base 110. The side cutting driver 1311 and the side cutting slice 1312 are both located above the conveyor belt 120. The side cutting driver 1311 is used to drive the side cutting slice 1312 to rotate.

[0051] In the above technical solution, the side cutting driver 1311 provides a power source to drive the side cutting slice 1312 to rotate and cut the side of the battery cell 190. The side cutting slice 1312 is circular, and its edge is provided with a cutting edge (not shown), which contacts the battery cell 190 on the conveyor line, and completes the side cutting through the rotational motion and the linear movement of the battery cell 190. The side cutting driver 1311 includes but is not limited to a rotary motor, a rotary cylinder or a rotary hydraulic cylinder.

[0052] Compared with a device without the side cutting piece 131 , the current collector burrs can be prevented from damaging the diaphragm 191 during the winding process of the battery cell 190 , resulting in failure to wind up normally, which can greatly improve the continuity of the winding operation.

[0053] refer to Figure 3 The film cutting component 132 includes a film cutting linear module 1321 and a cutting head 1322 connected to each other. The film cutting linear module 1321 is connected to the base 110. Both the film cutting linear module 1321 and the cutting head 1322 are located above the conveyor belt 120. The film cutting linear module 1321 is used to drive the cutting head 1322 to move.

[0054] In the above technical solution, the film cutting linear module 1321 can drive the cutting head 1322 to move by its own movement. The moving direction of the film cutting linear module 1321 is perpendicular to the extension direction of the conveyor line. In addition, the film cutting linear module 1321 can also drive the cutting head 1322 to move vertically, and a vertical driving member (not shown) can be set at the tail of the cutting head 1322 to provide a driving force in the vertical direction to the cutting head 1322 alone. The cutting head 1322 is used to cut the top of the battery cell 190, reduce the restrictions on the diaphragm 191 and the pole piece 192 inside the battery cell 190, and facilitate the subsequent separation and winding operations. The vertical driving member includes but is not limited to a linear electric cylinder, a linear air cylinder or a linear hydraulic cylinder.

[0055] Furthermore, the cutting head 1322 usually cuts a hole in the outermost multi-layer diaphragm 191 of the battery cell 190. The specific methods of the cutting head 1322 include but are not limited to thermal cutting and laser cutting, which can cleanly cut the outer diaphragm 191 while ensuring the integrity of the pole piece 192.

[0056] refer to Figure 4The bending member 140 includes a suspended roller 141 and an extrusion roller 142. Both the suspended roller 141 and the extrusion roller 142 are connected to the base 110 and are located above the conveyor belt 120. There is a gap between the bottom end of the suspended roller 141 and the conveyor belt 120. The bottom end of the extrusion roller 142 contacts the conveyor belt 120 and is used to extrude the battery cell 190 passing through and bend the battery cell 190.

[0057] In the above technical solution, when the battery cell 190 passes under the extrusion roller 142, it will be squeezed by the extrusion roller 142, causing the battery cell 190 to bend around a certain position in the middle, thereby breaking up the internal layered structure of the battery cell 190, making it easier for the split roll 150 in the subsequent process to be inserted into the battery cell 190.

[0058] There is a sufficient gap between the suspension roller 141 and the conveyor belt 120, and the end of the battery cell 190 after being squeezed and bent by the squeezing roller 142 will contact the suspension roller 141, thereby preventing the end of the battery cell 190 from tilting too much. There is one squeezing roller 142 and two suspension rollers 141, which are respectively arranged on both sides of the squeezing roller 142.

[0059] In addition, a roller cover (not shown) is provided on the outside of the suspended roller 141 and the extrusion roller 142, which is connected to the roller shaft (not shown) through a bearing (not shown), so as to provide a closed protection for the suspended roller 141 and the extrusion roller 142 and prevent individual impurities from splashing to the bottom of the extrusion roller 142 and the suspended roller 141.

[0060] In other embodiments of the present invention, the number of the extrusion rollers 142 may be two, three, four, etc., and the number of the suspension rollers 141 may be one, three, four, five, six, seven, eight, etc.

[0061] Since there is adhesive between the internal layered structures of the battery cell 190 , the internal structure of the battery cell 190 is tight. If the bending member 140 is not provided to bend and break up the internal layered structure of the battery cell 190 , the battery cell 190 cannot be directly mounted on the winding member 150 .

[0062] refer to Figure 5 The roll-splitting member 150 includes a roll-splitting shell 151, an insertion shaft 152, a roll-splitting linear module 153, an adsorption block 154 and a film-splitting rod 155. The roll-splitting shell 151 and the roll-splitting linear module 153 are both connected to the base 110, the insertion shaft 152 and the film-splitting rod 155 are both connected to the roll-splitting shell 151, and the adsorption block 154 is connected to the roll-splitting linear module 153; the insertion shaft 152 is used to be inserted into the interior of the battery cell 190, the adsorption block 154 is used to adsorb the diaphragm 191, and the roll-splitting linear module 153 is used to drive the adsorption block 154 to move so that the diaphragm 191 contacts and turns with the film-splitting rod 155.

[0063] In the above technical solution, the reel shell 151 plays a supporting and fixing role. The plug shaft 152 is flat and cut with a pointed head (not shown). Under the action of the second pusher 170, the battery cell 190 can be directly sleeved on the plug shaft 152. The reel linear module 153 is used to drive the adsorption block 154 to move in both vertical and horizontal directions, and the adsorption block 154 can adsorb the diaphragm 191 on the battery cell 190 and pull the diaphragm 191 to contact the membrane separation rod 155.

[0064] When the diaphragm 191 contacts the film separation rod 155, the diaphragm 191 is turned, while the pole piece 192, which is less tough than the diaphragm 191, will continue to move in the original direction. At this time, the pole piece 192 is separated from the diaphragm 191. The adsorption block 154 can be set on different sides of the diaphragm 191 according to actual use conditions, and when the diaphragm 191 is pulled and moved, it will not have a negative impact on the separation of the pole piece 192. In addition, the walking path of the winding linear module 153 is set by the program.

[0065] refer to Figure 5 The roll-dividing member 150 also includes a winder 156, which includes a winder rod 1561 and a winder driver 1562. The winder rod 1561 and the winder driver 1562 are both connected to the roll-dividing shell 151. There are two winder rods 1561, which are respectively located on both sides of the diaphragm 191 after contacting the film-dividing rod 155. The winder driver 1562 is used to drive the winder rod 1561 to rotate.

[0066] When the diaphragm 191 is separated from the electrode 192, the winding rod 1561 extends out and the diaphragm 191 is located between the two winding rods 1561. The winding driver 1562 is used to provide rotational power to the two winding rods 1561, so that the two winding rods 1561 rotate at the same time, thereby realizing the winding operation of the diaphragm 191. The winding driver 1562 includes but is not limited to a rotary motor, a rotary cylinder and a rotary hydraulic cylinder. After the winding is completed, the winding rod 1561 can retract by itself, discharge the multi-layer structure obtained by winding, and continue to wind the subsequent diaphragm 191. As the layered belt inside the battery cell 190 is wound, the layered belt of the battery cell 190 can be separated into the diaphragm 191, the positive electrode sheet, the diaphragm 191 and the negative electrode sheet.

[0067] In other embodiments of the present invention, the number of the winding rods 1561 may be three, four, five, etc.

[0068] An embodiment of the present invention further provides a method for disassembling a battery cell 190, comprising:

[0069] The battery cell 190 is cut first; the cutting operation is completed by the cutting piece 130, which includes a side cutting piece 131 and a film cutting piece 132. The side cutting piece 131 is used to cut the side of the battery cell 190, and the film cutting piece 132 is used to cut the top surface of the battery cell 190.

[0070] The cut battery cells 190 are then bent and broken up; the bending and breaking up operations are completed by the bending member 140, and the passing battery cells 190 are squeezed by the extrusion roller 142 in the bending member 140, so that the battery cells 190 are bent and the internal layered structure of the battery cells 190 is broken up.

[0071] Finally, the diaphragm 191 and the pole piece 192 in the bent and scattered battery cell 190 are separated; the separation operation is completed by the roll-splitting member 150, which includes a roll-splitting shell 151, an insert shaft 152, a roll-splitting linear module 153, an adsorption block 154 and a film-splitting rod 155, and may also include a reel 156. The insert shaft 152 is used to insert into the battery cell 190 after being bent and scattered, and the roll-splitting linear module 153 is used to drive the adsorption block 154 to move. The adsorption block 154 is used to adsorb the diaphragm 191 on the battery cell 190 and pull the diaphragm 191 to move, so that the diaphragm 191 contacts the film-splitting rod 155, and the diaphragm 191 after contact is turned. However, the pole piece 192 cannot complete the turn at the same time as the diaphragm 191 because its toughness is lower than that of the diaphragm 191, so it is separated from the diaphragm 191. The reel 156 is used to rotate and store the separated diaphragm 191.

[0072] According to a cell splitting device 100 provided in this embodiment, the working principles of the cell splitting device 100 and the cell splitting method are as follows:

[0073] The cell splitting device 100 includes: a conveyor belt 120, a cutting piece 130 and a roll-splitting piece 150. The conveyor belt 120 is used to convey the cell 190 to facilitate the streamlined input of the cell 190. The cutting piece 130 is used to cut the cell 190. The bending piece 140 is used to bend and break up the cut cell 190. The roll-splitting piece 150 is used to separate the diaphragm 191 and the pole piece 192 in the bent and broken up cell 190. The cutting piece 130, the bending piece 140 and the roll-splitting piece 150 are arranged in sequence along the conveying direction of the conveyor belt 120, so as to perform orderly splitting operations on the cell 190 on the conveyor belt 120 and improve the processing efficiency.

[0074] The battery cell disassembly device 100 and the battery cell disassembly method provided in this embodiment have at least the following advantages: they can perform a streamlined disassembly operation on the battery cells 190 to be disassembled, thereby improving the processing efficiency.

[0075] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A battery cell splitting device, characterized in that: include: A conveyor belt (120), and a cutting member (130), a bending member (140), and a roll separation member (150) sequentially arranged along the conveying direction of the conveyor belt (120); The conveyor belt (120) is used to convey the battery core (190), the cutting member (130) is used to cut the battery core (190), the bending member (140) is used to bend and break up the cut battery core (190), and the roll separation member (150) is used to separate the diaphragm (191) and the pole piece (192) in the bent and broken battery core (190); The bending member (140) comprises a suspended roller (141) and an extrusion roller (142); the suspended roller (141) and the extrusion roller (142) are both located above the conveyor belt (120); there is a gap between the bottom end of the suspended roller (141) and the conveyor belt (120); the bottom end of the extrusion roller (142) is in contact with the conveyor belt (120); the extrusion roller (142) is used to extrude the battery cell (190) passing through so as to bend the battery cell (190).

2. The battery cell splitting device according to claim 1, characterized in that: The cutting piece (130) comprises a side cutting piece (131) and a film cutting piece (132) which are sequentially arranged along the conveying direction of the conveyor belt (120); the side cutting piece (131) and the film cutting piece (132) are both located above the conveyor belt (120); the side cutting piece (131) is used for cutting the side surface of the battery cell (190), and the film cutting piece (132) is used for cutting the top surface of the battery cell (190).

3. The battery cell splitting device according to claim 2, characterized in that: The film cutting component (132) comprises a film cutting linear module (1321) and a cutting head (1322) which are connected to each other. The film cutting linear module (1321) is located above the conveyor belt (120). The film cutting linear module (1321) is used to drive the cutting head (1322) to move.

4. The battery cell splitting device according to claim 2, characterized in that: The side cutting member (131) comprises a side cutting driver (1311) and a side cutting slice (1312) which are connected to each other. The side cutting driver (1311) and the side cutting slice (1312) are both located above the conveyor belt (120). The side cutting driver (1311) is used to drive the side cutting slice (1312) to rotate.

5. The battery cell splitting device according to claim 1, characterized in that: The roll-splitting member (150) comprises a roll-splitting shell (151), an inserting shaft (152), a roll-splitting linear module (153), an adsorption block (154) and a film-splitting rod (155); the inserting shaft (152) and the film-splitting rod (155) are both connected to the roll-splitting shell (151), and the adsorption block (154) is connected to the roll-splitting linear module (153); The insertion shaft (152) is used to be inserted into the interior of the battery cell (190), the adsorption block (154) is used to adsorb the diaphragm (191), and the winding linear module (153) is used to drive the adsorption block (154) to move so that the diaphragm (191) contacts and turns with the membrane separation rod (155).

6. The battery cell splitting device according to claim 5, characterized in that: The winding member (150) further includes a winder (156), and the winder (156) includes a winding rod (1561) and a winding drive (1562). Both the winding rod (1561) and the winding drive (1562) are connected to the winding shell (151). There are two winding rods (1561), and the two winding rods (1561) are respectively located on both sides of the diaphragm (191) after contacting the film separation rod (155). The winding drive (1562) is used to drive the winding rod (1561) to rotate.

7. The battery cell splitting device according to claim 1, characterized in that: The battery cell splitting device further comprises a first pushing member (160), the first pushing member (160) being located above the conveyor belt (120), the pushing direction of the first pushing member (160) being perpendicular to the extension direction of the conveyor belt (120), and the first pushing member (160) being used to push the battery cell (190) onto the conveyor belt (120) and close to one side of the cutting member (130).

8. The battery cell splitting device according to claim 1, characterized in that: The battery cell splitting device also includes a second pushing member (170), which is located above the conveyor belt (120), and the pushing direction of the second pushing member (170) is perpendicular to the extension direction of the conveyor belt (120). The second pushing member (170) is used to push the battery cell (190) from the conveyor belt (120) to the winding member (150).

9. A method for disassembling a battery cell, characterized in that: Used in the battery cell splitting device according to any one of claims 1 to 8, the battery cell splitting method comprising: Cutting the battery cell (190); Bending and breaking up the cut battery cells (190); The diaphragm (191) and the pole piece (192) in the bent and scattered battery cell (190) are separated.

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