Transfer device and battery production system

Abstract

The utility model provides a transfer device and a battery production system, the transfer device is used for transferring an electrode assembly, and the transfer device comprises a bearing part, a covering part and a driving part. The bearing piece comprises a bearing part and a first wall part, the first wall part is located on the edge of the bearing part, the bearing part is used for bearing the electrode assembly, the first wall part extends in the first direction, and the first direction is perpendicular to the opposite arrangement direction of the bearing piece and the covering piece. The covering part is arranged opposite to the bearing part and movably connected to the bearing part in the first direction. The covering part is used for covering a part of the electrode assembly. The driving part is used for driving the bearing part to move. According to the invention, the production yield of the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a transfer device and a battery production system. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, how to improve the production yield of battery cells has always been a research direction in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a transfer device and a battery production system, which can improve the production yield of battery cells.

[0005] In a first aspect, the present application provides a transfer device, which is used to transfer an electrode assembly, and the transfer device includes a carrier, a cover, and a drive. The carrier includes a carrier portion and a first wall portion, the first wall portion is located at the edge of the carrier portion, the carrier portion is used to carry the electrode assembly, and the first wall portion extends along a first direction, and the first direction is perpendicular to the relative arrangement direction of the carrier and the cover. The cover is arranged relative to the carrier and is movably connected to the carrier, and the cover is used to cover a part of the electrode assembly. The drive is used to drive the carrier to move.

[0006] In the above scheme, the electrode assembly is covered by providing a cover to reduce the possibility of contact between impurities generated during the process and the electrode assembly, thereby reducing the risk of impurities contaminating the electrode assembly and improving the production yield. In addition, the cover and the carrier are movably connected, which is conducive to improving the automation of the transfer device and improving production efficiency.

[0007] In some embodiments, the first wall portion is provided with a movable channel, the cover is movably connected to the movable channel, and the movable channel is extended along the first direction.

[0008] In the above scheme, by setting up a moving channel, it is helpful to simplify the connection method between the carrier and the cover, so that the cover can be moved to a predetermined position after switching from the second state to the first state multiple times, thereby reducing the alignment accuracy of the cover and the carrier and improving production efficiency.

[0009] In some embodiments, the carrier also includes a first slider, the first slider is located in the moving channel and is movably arranged relative to the moving channel, and the first slider is connected to the cover.

[0010] In the above solution, the first sliding block is provided to reduce the friction resistance between the covering member and the supporting member when the covering member moves, thereby increasing the service life of the transfer device and reducing the production cost.

[0011] In some embodiments, the covering member includes a covering plate and a pressure-applying assembly, wherein the pressure-applying assembly is located at an edge of the covering plate, and is used to apply pressure to the covering plate in a direction of the covering plate toward the carrier.

[0012] In the above scheme, a pressure-applying component is provided to apply pressure to the covering plate so that the covering plate can press down the carrier or the electrode assembly, so that the carrier and the covering plate clamp the electrode assembly, thereby reducing the possibility of displacement of the electrode assembly during the movement of the transfer device, thereby simplifying the alignment device in the preparation process, reducing production costs, and improving production yield.

[0013] In some embodiments, the pressure assembly includes a first connection portion, a second connection portion, and an elastic member. The cover plate is connected to the support member through the first connection portion. The second connection portion is located on a side of the first connection portion facing away from the support member, and a portion of the second connection portion protrudes from the cover plate in a direction away from the support member. The elastic member is connected to the second connection portion, and the elastic member is located on a side of the cover plate facing away from the support member.

[0014] In the above scheme, it is helpful to simplify the overall structure of the pressure assembly while allowing the pressure assembly and the covering plate to move together, thereby reducing the possibility that different pressure positions during multiple uses of the pressure assembly will lead to different relative positions of different electrode assemblies with the transfer device during the preparation process, thereby reducing the risk of performance differences in different battery cells formed.

[0015] In some embodiments, the carrier includes a carrier portion and a first wall portion, the first wall portion is located at the edge of the carrier portion, the pressure assembly also includes a second slider, the cover plate is fixedly connected to the second slider, and the second slider is movably arranged relative to the first wall portion.

[0016] In the above scheme, by setting the first slider and the second slider, the cover can include two moving strokes. The first moving stroke is that the first slider drives the cover as a whole to move along the first direction, and the second moving stroke is that the second slider drives the cover plate to move along the first direction. This is beneficial to increase the size of the cover plate in the first direction while reducing the connection size between the cover and the carrier, thereby reducing the overall size of the moving channel on the carrier, improving the overall strength of the carrier, and improving the service life of the carrier.

[0017] In some embodiments, the first wall portion is provided with a groove, which is formed by the first wall portion being recessed toward one side of the cover plate, and when the cover member and the carrier member are arranged opposite to each other, at least a portion of the second sliding block is located in the groove.

[0018] In the above solution, by providing the groove, when the second slider is in the groove, the cover plate can be relatively fixed to the pressure assembly, thereby reducing the possibility of relative displacement between the cover plate and the pressure assembly in the first state.

[0019] In some embodiments, the electrode assembly includes a main body and a tab, wherein the tab is protruded from an edge of the main body, and the cover is used to cover at least one end of the main body close to the tab.

[0020] In the above solution, it is helpful to adjust the size of the cover according to design requirements, thereby improving the application range of the transfer device.

[0021] In some embodiments, the main body includes a side wall, and the tab is protruding from the side wall. The cover also includes a covering portion and a first limiting portion, the covering portion is arranged opposite to the carrier, the first limiting portion is protruding from the covering portion along the direction of the covering portion toward the carrier, and the first limiting portion is used to abut against the side wall.

[0022] In the above scheme, by setting the first limiting portion, the cover can protect the side wall of the electrode assembly, thereby reducing the possibility of impurities generated during the preparation of the electrode ear and the connection of the electrode ear with other components contaminating the active material layer of the electrode assembly, thereby improving the production yield.

[0023] In some embodiments, the electrode assembly includes a main body and a tab, the main body includes a side wall, and the tab is protruded from the side wall. The bearing member includes a bearing member and a second limiting member, the second limiting member is protruded from the bearing member along the direction of the bearing member toward the cover member, and the second limiting member is used to abut against the side wall.

[0024] In the above scheme, when the electrode assembly is transferred from other processes to the transfer device, the electrode assembly needs to be position-corrected first to facilitate the subsequent production processes. When correcting the position of the electrode assembly, at least part of the side wall of the electrode assembly can abut against the side surface of the second limiting portion facing the electrode assembly, thereby correcting the position of the electrode assembly in a single direction. Then, the position of the electrode assembly in other directions can be corrected by other devices so that the position of the electrode assembly on the carrier is in a preset position, thereby reducing the steps during position correction and improving production efficiency.

[0025] In some embodiments, at least one of the first limiting portion and the second limiting portion includes an avoidance opening, and the avoidance opening is used to avoid the tab.

[0026] In the above scheme, it is beneficial to improve the protection performance of the first limiting part and the second limiting part on the electrode assembly, while reducing the possibility of the first limiting part and the second limiting part interfering with the electrode ear.

[0027] In a second aspect, an embodiment of the present application provides a battery production system, comprising a transfer device in any of the aforementioned embodiments.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of an exploded structure of a battery production system provided in an embodiment of the present application;

[0031] Figure 2 is a structural schematic diagram of a transfer device provided in an embodiment of the present application;

[0032] Figure 3 is a structural schematic diagram of another transfer device provided in an embodiment of the present application;

[0033] Figure 4 is a structural schematic diagram of a transfer device provided by an embodiment of the present application in a first state;

[0034] Figure 5 is a structural schematic diagram of a transfer device provided by an embodiment of the present application in a second state;

[0035] Figure 6 is a structural schematic diagram of another transfer device provided in an embodiment of the present application;

[0036] Figure 7 It is a structural schematic diagram of a bearing member provided in an embodiment of the present application;

[0037] Figure 8 It is a schematic diagram of the structure of a cover provided in an embodiment of the present application.

[0038] Marking Description

[0039] 100, transfer device; 200, electrode assembly; 210, main body; 211, side wall; 220, pole ear;

[0040] 10. bearing member; 11. bearing portion; 12. first wall portion; 121. moving channel; 122. groove; 13. first slider; 14. second position limiting portion;

[0041] 20. Covering member; 21. Covering plate; 22. Pressing assembly; 221. First connecting portion; 222. Second connecting portion; 223. Elastic member; 224. Second sliding block; 23. Covering portion; 24. First limiting portion;

[0042] 30. Driving parts;

[0043] K. Avoid openings;

[0044] X, first direction. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0054] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0055] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0056] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0057] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0058] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium with silver surface treatment may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0059] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0060] As an example, the negative electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0061] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0062] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0063] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.

[0064] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0065] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0066] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0067] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0068] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0069] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0070] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0071] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the production yield of battery cells must also be considered.

[0072] The battery cell includes a shell and an electrode assembly. The electrode assembly needs to go through different processes before being installed in the shell. After the electrode assembly is prepared, it is installed in the shell. In the process of transferring the electrode assembly between different processes, the electrode assembly needs to be grabbed from different processes, placed in a predetermined position and positioned before the preparation of the process is carried out, which is not conducive to improving production efficiency.

[0073] In order to improve production efficiency, multiple processes are usually connected together through a production line, and the electrode assemblies are carried by a transfer device to move between different processes. However, during the preparation process of some processes, impurities will be generated, which will contaminate the electrode assemblies and make the electrode assemblies unable to be used normally, resulting in a decrease in the production yield of battery cells.

[0074] Based on the above technical problems, the present application provides a technical solution, which covers the electrode assembly by setting a cover to reduce the possibility of impurities generated during the process of preparation coming into contact with the electrode assembly, thereby reducing the risk of impurities contaminating the electrode assembly and improving the production yield. In addition, the cover and the carrier can be movably connected, which is conducive to improving the automation of the transfer device and improving production efficiency.

[0075] The embodiment of the present application provides a battery production system. The battery production system includes a transfer device.

[0076] The battery production system may include multiple production processes, for example, a process of connecting the tabs of the electrode assembly to the adapter, a process of connecting the adapter to the electrode terminal, and other processes.

[0077] Optionally, multiple processes can be arranged on the same production line, and the transfer device can move the cells to corresponding process positions on the transfer track to improve the production efficiency of the battery cells.

[0078] Figure 1 It is a schematic diagram of the explosion structure of a battery production system provided in an embodiment of the present application. Figure 2 It is a structural schematic diagram of a transfer device provided in an embodiment of the present application. Figure 3 It is a structural schematic diagram of another transfer device provided in an embodiment of the present application.

[0079] See also Figures 1 to 3 The embodiment of the present application provides a transfer device 100, which is used to transfer an electrode assembly 200. The transfer device 100 includes a carrier 10, a cover 20, and a drive 30. The carrier 10 is used to carry the electrode assembly 200. The cover 20 is arranged opposite to the carrier 10 and is movably connected to the carrier 10. The cover 20 is used to cover a part of the electrode assembly 200. The drive 30 is used to drive the carrier 10 to move.

[0080] For example, the transfer device 100 can be connected to an external production line, and the transfer device 100 can carry the electrode assembly 200 to move to different positions on the production line. Optionally, the different positions on the production line can be different positions of the same process or different processes.

[0081] The transfer device 100 includes a driving member 30 , and the driving member 30 drives the carrier 10 to move, thereby driving the electrode assembly 200 carried on the carrier 10 to move.

[0082] The transfer device 100 includes a carrier 10 and a cover 20. The carrier 10 and the cover 20 together define a storage space for accommodating the electrode assembly 200. The carrier 10 may be a hollow structure with one end open, and the cover 20 is a plate-like structure, and the cover 20 covers the open side of the carrier 10. The cover 20 and the carrier 10 may also both be hollow structures with one side open, and the open side of the cover 20 covers the open side of the carrier 10.

[0083] Optionally, the cover 20 can move in a direction away from the carrier 10. Alternatively, the cover 20 can also move in a direction perpendicular to the direction away from the carrier 10. Of course, the cover 20 and the carrier 10 can also be movably connected in a hinged manner.

[0084] Optionally, the transfer device 100 may include a first state and a second state. In the first state, the cover 20 and the carrier 10 are arranged relative to each other, and the electrode assembly 200 is located between the cover 20 and the carrier 10; in the second state, the carrier 10 is in an empty state, waiting for the electrode assembly 200 to be placed on the carrier 10.

[0085] Optionally, the electrode assembly 200 may include a main body 210 and a tab 220 , and the cover 20 may cover the main body 210 . Of course, the cover 20 may also cover a portion of the tab 220 .

[0086] In the embodiment of the present application, the electrode assembly 200 is covered by providing a cover 20 to reduce the possibility of impurities generated during the process of preparation coming into contact with the electrode assembly 200, thereby reducing the risk of impurities contaminating the electrode assembly 200 and improving the production yield. In addition, the cover 20 and the carrier 10 are movably connected, which is conducive to improving the automation of the transfer device 100 and improving production efficiency.

[0087] In some optional embodiments, see Figures 1 to 3 The cover member 20 is movably disposed along a first direction X, and the first direction X is perpendicular to a relative disposition direction of the carrier 10 and the cover member 20 .

[0088] It can be understood that the relative direction of the carrier 10 and the cover 20 is the relative direction of the carrier 10 and the cover 20 when the electrode assembly 200 is clamped between the carrier 10 and the cover 20 in the first state. The cover 20 can move along the first direction X to achieve switching between the first state and the second state.

[0089] Optionally, the side-by-side arrangement direction of the main body 210 and the tab 220 of the electrode assembly 200 and the first direction X may be parallel or may intersect.

[0090] In an embodiment of the present application, through the above-mentioned arrangement, the electrode assembly 200 can be grasped by a mechanical gripper and placed on the carrier 10, and the cover 20 moves along the first direction X to reduce the possibility of interference between the cover 20 and the mechanical gripper, thereby improving the degree of automation of the transfer device 100 and improving production efficiency.

[0091] In some optional embodiments, see Figures 1 to 3 The carrier 10 includes a carrier portion 11 and a first wall portion 12. The first wall portion 12 is located at the edge of the carrier portion 11. The carrier portion 11 is used to carry the electrode assembly 200. The first wall portion 12 is provided with a movable channel 121. The cover 20 is movably connected to the movable channel 121. The movable channel 121 is extended along the first direction X.

[0092] Optionally, the number of the first wall portions 12 may include two, the two first wall portions 12 are arranged on both sides of the supporting portion 11 along the second direction, the two first wall portions 12 and the supporting portion 11 together enclose a recess, the two first wall portions 12 form a side wall 211 of the recess, and a portion of the electrode assembly 200 is located in the recess.

[0093] Optionally, the first direction X, the second direction, and the relative arrangement directions of the carrier 10 and the cover 20 are arranged perpendicularly in pairs.

[0094] Optionally, the moving channel 121 may include a groove 122 or an elongated hole.

[0095] Optionally, a portion of the cover 20 may be located in the moving channel 121 , and the portion of the cover 20 located in the moving channel 121 may move in the moving channel 121 along the extension direction of the moving channel 121 to move the cover 20 as a whole along the extension direction of the moving channel 121 .

[0096] The embodiment of the present application adopts the above-mentioned configuration, in which the movable channel 121 is provided, which is helpful to simplify the connection method between the carrier 10 and the cover 20, so that the cover 20 can be moved to a predetermined position after switching from the second state to the first state multiple times, thereby reducing the alignment accuracy of the cover 20 and the carrier 10 and improving production efficiency.

[0097] In some optional embodiments, see Figures 1 to 3 The carrier 10 further includes a first slider 13 , which is located in the moving channel 121 and is movably disposed relative to the moving channel 121 , and is connected to the cover 20 .

[0098] Exemplarily, the first sliding block 13 can reciprocate in the moving channel 121 along the extending direction of the moving channel 121 , so that the cover 20 moves along the first direction X.

[0099] Optionally, the first slider 13 may include a linear slider and a rolling slider. For example, the first slider 13 includes a sliding block or a roller.

[0100] Optionally, the carrier 10 may further include a driver, which drives the first sliding block 13 to move.

[0101] Optionally, the cover 20 may be located above the first slider 13 , and a portion of the structure of the cover 20 is disposed in contact with the first slider 13 , so that when the first slider 13 moves, the cover 20 may be driven to move.

[0102] Optionally, the first sliding block 13 may be fixedly connected to the cover 20 .

[0103] In the embodiment of the present application, the first sliding block 13 is provided to reduce the friction resistance between the cover member 20 and the carrier 10 when the cover member 20 moves, thereby increasing the service life of the transfer device 100 and reducing the production cost.

[0104] In some optional embodiments, see Figures 1 to 3 The cover 20 includes a cover plate 21 and a pressure component 22. The pressure component 22 is located at the edge of the cover plate 21. The pressure component 22 is used to apply pressure to the cover plate 21 along the direction of the cover plate 21 pointing to the bearing component.

[0105] Optionally, the cover plate 21 is disposed to cover a portion of the electrode assembly 200 .

[0106] Optionally, the orthographic projection of the pressure assembly 22 on the cover plate 21 and the orthographic projection of the electrode assembly 200 on the cover plate 21 can be arranged at intervals. Of course, the orthographic projection of the pressure assembly 22 on the cover plate 21 and the orthographic projection of the electrode assembly 200 on the cover plate 21 can also be arranged to overlap.

[0107] Optionally, the pressure component 22 may be located only on the side of the cover plate 21 facing away from the carrier 10. Exemplarily, the pressure component 22 may be a pressure block with a preset weight.

[0108] In the embodiment of the present application, a pressure component 22 is provided, and the pressure component 22 applies pressure to the cover plate 21, so that the cover plate 21 can press down the carrier 10 or press down the electrode assembly 200, so that the carrier 10 and the cover plate 21 clamp the electrode assembly 200, thereby reducing the possibility of displacement of the electrode assembly 200 during the movement of the transfer device 100, thereby simplifying the alignment device in the preparation process, reducing production costs, and improving production yield.

[0109] Figure 4 It is a structural schematic diagram of a transfer device provided in an embodiment of the present application in a first state. Figure 5 is a schematic diagram of the structure of a transfer device provided in an embodiment of the present application in the second state. It should be noted that: Figure 4 and Figure 5 The structure with medium thick solid line is the pressure component and the cover plate.

[0110] In some optional embodiments, see Figure 1 , Figure 4 and Figure 5The pressure assembly 22 includes a first connection portion 221, a second connection portion 222 and an elastic member 223. The cover plate 21 is connected to the carrier 10 via the first connection portion 221. The second connection portion 222 is located on the side of the first connection portion 221 facing away from the carrier 10, and a portion of the second connection portion 222 protrudes from the cover plate 21 in a direction away from the carrier 10. The elastic member 223 is connected to the second connection portion 222, and the elastic member 223 is located on the side of the cover plate 21 facing away from the carrier 10.

[0111] Optionally, the first connection part 221 and the second connection part 222 may be an integral structure. Of course, the first connection part 221 and the second connection part 222 may also be a separate structure. The first connection part 221 and the second connection part 222 may be fixedly connected by screwing, riveting, welding, etc.

[0112] Optionally, the first connection part 221 can be a plate-like structure, the first connection part 221 can have a predetermined thickness, the first connection part 221 and the first slider 13 can be fixedly connected, and of course, the first connection part 221 can also be located above the first slider 13, and the first slider 13 can drive the first connection part 221 to move when it moves.

[0113] Optionally, the second connecting portion 222 may be a rod-shaped structure.

[0114] Exemplarily, a through hole may be provided on the cover plate 21, and the second connecting portion 222 passes through the through hole. The second connecting portion 222 may include a first part and a second part. The second part is connected to the first connecting portion 221 through the first part, and the second part is located on the side of the cover plate 21 facing away from the carrier 10. The elastic member 223 passes through the second part, and one end of the elastic member 223 is connected to one end of the second part facing away from the first part, and the other end of the elastic member 223 abuts against the side of the cover plate 21 facing away from the carrier.

[0115] Exemplarily, the second connecting portion 222 may include a third part and a fourth part, the fourth part is connected to the first connecting portion 221 through the third part, the third part extends along the thickness direction of the covering plate 21, and a part of the third part is located on the side of the covering plate 21 facing away from the supporting member 10, and the fourth part extends in a direction perpendicular to the thickness direction of the covering plate 21, one end of the elastic member 223 is connected to the fourth part, and the other end of the elastic member 223 abuts against the side of the covering plate 21 facing away from the supporting member.

[0116] Optionally, the orthographic projection of the elastic member 223 on the cover plate 21 may be spaced apart from the orthographic projection of the electrode assembly 200 on the cover plate 21. Alternatively, the orthographic projection of the elastic member 223 on the cover plate 21 may overlap with the orthographic projection of the electrode assembly 200 on the cover plate 21.

[0117] The above-mentioned arrangement in the embodiment of the present application is conducive to simplifying the overall structure of the pressure assembly 22, while allowing the pressure assembly 22 and the covering plate 21 to move together, thereby reducing the possibility that different pressure positions during multiple uses of the pressure assembly 22 will cause different electrode assemblies 200 to have different relative positions with the transfer device 100 during the preparation process, thereby reducing the risk of performance differences in different battery cells formed.

[0118] In some optional embodiments, see Figure 1 , Figure 4 and Figure 5 The bearing member includes a bearing portion and a first wall portion, the first wall portion is located at the edge of the bearing portion, the pressure assembly 22 also includes a second slider 224, the cover plate 21 is fixedly connected to the second slider 224, and the second slider 224 is movably arranged relative to the first wall portion.

[0119] Optionally, the second slider 224 may include a linear slider and a rolling slider. For example, the second slider 224 includes a sliding block or a roller.

[0120] Optionally, the pressure-applying assembly 22 may further include a driver, which drives the second slider 224 to move.

[0121] Optionally, the cover plate 21 may be located above the second slider 224 , and the side of the cover plate 21 facing the carrier 10 is in contact with the first slider 13 , and when the first slider 13 moves, the cover plate 21 may be driven to move.

[0122] Optionally, the second sliding block 224 may be located on a side of the cover plate 21 .

[0123] In these optional embodiments, by setting the first slider 13 and the second slider 224, the cover 20 can include two moving strokes. The first moving stroke is that the first slider 13 drives the cover 20 as a whole to move along the first direction X, and the second moving stroke is that the second slider 224 drives the cover plate 21 to move along the first direction X, which is beneficial to increase the size of the cover plate 21 in the first direction X while reducing the connection size between the cover 20 and the carrier 10, thereby reducing the overall size of the moving channel 121 on the carrier 10, improving the overall strength of the carrier 10, and improving the service life of the carrier 10.

[0124] In some optional embodiments, see Figure 1 , Figure 4 and Figure 5 The first wall portion is provided with a groove 122 , which is formed by the first wall portion being recessed toward one side of the cover plate 21 . When the cover member 20 and the carrier member 10 are arranged opposite to each other, at least a portion of the second sliding block 224 is located in the groove 122 .

[0125] Optionally, the second state may include a first sub-state and a second sub-state. Optionally, the first state switches to the first sub-state, and the first sub-state switches to the second sub-state.

[0126] For example, Figure 4 and Figure 5 As shown, in the process of switching from the first state to the first sub-state, the second slider 224 drives the cover 20 to move along the first direction X, so that the second slider 224 moves from the inside of the groove 122 to the outside of the groove; in the process of switching from the first sub-state to the second sub-state, for example, a track is further provided on the surface of one side of the first wall portion facing the cover plate 21, and the second slider 224 moves on the track in a direction away from the groove 122 corresponding to the second slider 224, and the first slider 13 drives the cover 20 to move in a direction away from the bearing portion 11. In the process of switching from the second state to the first state, the second slider 224 can be moved from the track to the inside of the groove 122.

[0127] Alternatively, the groove 122 may be located at the end of the track.

[0128] Optionally, the groove 122 may also be located at any position of the track.

[0129] Optionally, the track may be arranged to extend along the first direction X.

[0130] Optionally, when the cover 20 and the carrier 10 are arranged opposite to each other (ie, in the first state), the entire second slider 224 may be located in the groove 122 . Of course, only a portion of the second slider 224 may be located in the groove 122 .

[0131] In the embodiment of the present application, by setting the groove 122, when the second slider 224 is in the groove 122, the cover plate 21 can be relatively fixed to the pressure assembly 22, thereby reducing the possibility of relative displacement between the cover plate 21 and the pressure assembly 22 in the first state.

[0132] Figure 6 It is a structural schematic diagram of another transfer device provided in an embodiment of the present application.

[0133] In some optional embodiments, see Figure 2 and Figure 6 The electrode assembly 200 includes a main body 210 and a tab 220 . The tab is protruded from the edge of the main body 210 . The cover 20 is used to cover at least one end of the main body 210 close to the tab 220 .

[0134] In some examples, such as Figure 2As shown, the cover 20 only covers one end of the main body 210 close to the tab 220, which is beneficial to reduce the overall size of the cover 20, thereby reducing the moving stroke of the cover 20 and improving production efficiency. Figure 7 As shown, the cover 20 covers the entire body 210, which is beneficial to increase the protection of the electrode assembly 200 and further reduce the possibility of impurities contaminating the electrode assembly 200. It can be understood that the end of the body 210 close to the tab 220 refers to the end where the tab is connected to the body 210.

[0135] In these optional embodiments, the above configuration is helpful to adjust the size of the cover 20 according to design requirements, thereby improving the application range of the transfer device 100.

[0136] In some optional embodiments, see Figure 6 The main body 210 includes a side wall 211, and the tab 220 is protruded from the side wall. The cover 20 also includes a cover 23 and a first limiter 24. The cover 23 is arranged opposite to the carrier, and the first limiter 24 is protruded from the cover 23 along the direction of the cover 20 toward the carrier 10. The first limiter 24 is used to abut against the side wall 211.

[0137] Optionally, the covering plate 21 may include a covering portion 23 and a first limiting portion 24 .

[0138] Optionally, the electrode assembly 200 may include a pole piece, the pole piece includes a current collector and an active material layer located on the current collector, the side of the current collector and the side of the active material layer together form a side wall 211 of the main body 210, and the pole ear 220 is connected to the side of the current collector. Optionally, the active material layer is not coated on the pole ear 220. Optionally, since the sub-pole ears 220 on the multiple pole pieces are not coated with the active material layer, the multiple sub-pole ears 220 can be close to each other and attached to each other so that the multiple sub-pole ears form a pole ear, and the thickness of the pole ear is less than the thickness of the main body 210.

[0139] Optionally, the first limiting portion 24 of the cover 20 may cover the entire side wall 211 of the main body 210. Optionally, the first limiting portion 24 of the cover 20 may also cover a portion of the side wall 211 of the main body 210.

[0140] In the embodiment of the present application, by setting the first limiting portion 24, the cover 20 can protect the side wall 211 of the electrode assembly 200, thereby reducing the possibility of impurities generated during the preparation of the electrode tab 220 and the connection of the electrode tab with other components contaminating the active material layer of the electrode assembly 200, thereby improving the production yield.

[0141] In some optional embodiments, see Figure 6The electrode assembly 200 includes a main body 210 and a tab 220. The main body includes a side wall 211. The tab 220 is protruded from the side wall. The carrier 10 includes a covering portion and a second limiting portion 14. The second limiting portion is protruded from the carrier 11 in a direction from the carrier 11 toward the covering portion 20. The second limiting portion 14 is used to abut against the side wall 211.

[0142] When the electrode assembly 200 is transferred from other processes to the transfer device 100, the electrode assembly 200 needs to be position-corrected first to facilitate subsequent production processes. When correcting the position of the electrode assembly 200, at least a portion of the side wall 211 of the electrode assembly 200 can abut against the side surface of the second limiting portion 14 facing the electrode assembly 200, thereby correcting the position of the electrode assembly 200 in a single direction. Then, the position of the electrode assembly 200 in other directions can be corrected by other devices so that the position of the electrode assembly 200 on the carrier 10 is at a preset position, thereby reducing the steps in position correction and improving production efficiency.

[0143] Optionally, the second limiting portion 14 may cover the entire side wall 211 of the main body 210. Optionally, the second limiting portion 14 may also cover a portion of the side wall 211 of the main body 210.

[0144] In some embodiments, the electrode tab 220 of the electrode assembly 200 includes a positive tab 220 and a negative tab 220. When the positive tab and the negative tab are located on the same side of the electrode assembly 200, the first limiting portion 24 and the second limiting portion 14 can be only arranged on one side of the electrode assembly 200 having the tab 220. When the positive electrode tab 220 and the negative electrode tab are located on different sides of the electrode assembly 200, the first limiting portion 24 may be provided only on one side of the electrode assembly 200 having the positive electrode tab 220, and the second limiting portion 14 may be provided on one side of the electrode assembly 200 having the negative electrode tab 220; or, the second limiting portion 14 may be provided only on one side of the electrode assembly 200 having the positive electrode tab 220, and the first limiting portion 24 may be provided on one side of the electrode assembly 200 having the negative electrode tab 220; or, the first limiting portion 24 and the second limiting portion 14 may be provided on one side of the electrode assembly 200 having the positive electrode tab 220, and the first limiting portion 24 and the second limiting portion 14 may be provided on one side of the electrode assembly 200 having the negative electrode tab 220.

[0145] Figure 7 It is a structural schematic diagram of a bearing component provided in an embodiment of the present application. Figure 8 It is a schematic diagram of the structure of a cover provided in an embodiment of the present application.

[0146] In some optional embodiments, see Figure 7 and Figure 8At least one of the first limiting portion 24 and the second limiting portion 14 includes an avoidance opening K, and the avoidance opening is used to avoid the pole ear 220.

[0147] In some examples, the first position-limiting portion 24 includes an avoidance opening K. In other examples, the second position-limiting portion 14 includes an avoidance opening K. In other examples, both the first position-limiting portion 24 and the second position-limiting portion 14 include an avoidance opening K.

[0148] In some examples, the first limiting portion 24 may only cover a portion of the side wall 211 of the main body 210 on the side of the pole ear 220 facing away from the load-bearing portion 11, and the second limiting portion 14 may only cover a portion of the side wall 211 of the main body 210 on the side of the pole ear 220 facing the load-bearing portion 11. The first limiting portion 24 and the second limiting portion 14 may be abutted against each other, and the avoidance opening K of the first limiting portion 24 and the avoidance opening of the second limiting portion 14 together form an opening through which the pole ear 220 can extend.

[0149] In these optional embodiments, the above arrangement is beneficial for improving the protection performance of the first limiting portion 24 and the second limiting portion 14 on the electrode assembly 200 while reducing the possibility of interference between the first limiting portion 24 and the second limiting portion 14 and the electrode tab 220 .

[0150] In a second aspect, an embodiment of the present application provides a battery production system, comprising the transfer device 100 in any of the aforementioned embodiments.

[0151] According to some embodiments of the present application, please refer to Figures 4 to 8 The transfer device 100 is used to transfer the electrode assembly 200. The transfer device 100 includes a carrier 10, a cover 20 and a drive 30. The carrier 10 is used to carry the electrode assembly 200. The cover 20 is arranged opposite to the carrier 10 and is movably connected to the carrier 10, and the cover 20 is used to cover a part of the electrode assembly 200. The drive 30 is used to drive the carrier 10 to move.

[0152] The cover 20 is movably disposed along a first direction X, and the first direction is perpendicular to the relative arrangement direction of the carrier 10 and the cover 20. Optionally, the first direction X is parallel to the side-by-side arrangement direction of the tab 220 and the main body 210.

[0153] The carrier 10 includes a carrier portion 11, a first wall portion 12, and a first slider 13. The first wall portion is located at the edge of the carrier portion 11. The carrier portion is used to carry the electrode assembly 200. The first wall portion 12 is provided with a moving channel 121. The moving channel is extended along the first direction X. The first slider 13 is located in the moving channel 121 and is movably arranged relative to the moving channel. The first slider 13 is connected to the cover 20.

[0154] The cover member includes a cover plate 21 and a pressure assembly 22, and the pressure assembly includes a first connection portion 221, a second connection portion 222 and an elastic member 223. The cover plate 21 is connected to the carrier 10 through the first connection portion 221. The second connection portion 222 is located on the side of the first connection portion 221 facing away from the carrier 10, and part of the second connection portion 222 protrudes from the cover plate 21 in a direction away from the carrier 10. The elastic member 223 is connected to the second connection portion 222, and the elastic member 223 is located on the side of the cover plate 21 facing away from the carrier 10. The pressure assembly 22 also includes a second slider 224, the cover plate 21 is fixedly connected to the second slider 224, and the second slider 224 is movably arranged relative to the first wall portion. The first wall portion is provided with a groove 122, which is formed by the first wall portion being recessed toward the side of the cover plate 21. When the cover member 20 is arranged relative to the carrier 10, at least part of the second slider 224 is located in the groove 122.

[0155] The electrode assembly 200 includes a main body 210 and a tab 220 . The tab is protruded from the edge of the main body. The cover 20 is used to cover one end of the main body 210 close to the tab 220 .

[0156] The cover 20 further includes a cover portion 23 and a first limit portion 24. The cover portion is arranged opposite to the bearing portion 11. The first limit portion 24 is arranged to protrude from the cover portion 23 along the direction from the cover 20 to the bearing portion 10. The first limit portion 24 is arranged to abut against the side wall 211. The bearing portion 10 includes a second limit portion 14. The second limit portion is arranged to protrude from the bearing portion 11 along the direction from the bearing portion 11 to the cover 20. The second limit portion 14 is arranged to abut against the side wall 211. Both the first limit portion 24 and the second limit portion 14 include an avoidance opening K, which is used to avoid the tab 220.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A transfer device for transferring an electrode assembly, characterized in that: The transfer device comprises: A carrier, comprising a carrier portion and a first wall portion, wherein the first wall portion is located at an edge of the carrier portion, the carrier portion is used to carry the electrode assembly, and the first wall portion extends along a first direction; a covering member, the covering member being arranged opposite to the supporting member and being movably connected to the supporting member along the first direction, the covering member being used to cover a portion of the electrode assembly, the first direction being perpendicular to a direction in which the supporting member and the covering member are arranged opposite to each other; A driving member is used to drive the bearing member to move.

2. The transfer device according to claim 1, characterized in that: The first wall portion is provided with a movable channel, the cover is movably connected to the movable channel, and the movable channel is extended along the first direction.

3. The transfer device according to claim 2, characterized in that: The bearing member further includes a first sliding block, the first sliding block is located in the moving channel and is movably arranged relative to the moving channel, and the first sliding block is connected to the covering member.

4. The transfer device according to claim 1, characterized in that: The covering member comprises a covering plate and a pressure component, wherein the pressure component is located at an edge of the covering plate and is used to apply pressure to the covering plate in a direction from the covering plate to the supporting member.

5. The transfer device according to claim 4, characterized in that: The pressure applying component comprises: a first connection portion, through which the cover plate is connected to the carrier; A second connection portion, located at a side of the first connection portion facing away from the carrier, and a portion of the second connection portion protrudes from the cover plate in a direction away from the carrier; An elastic member is connected to the second connecting portion, and the elastic member is located on a side of the cover plate facing away from the bearing member.

6. The transfer device according to claim 5, characterized in that: The bearing member includes a bearing portion and a first wall portion, wherein the first wall portion is located at an edge of the bearing portion, and the pressure assembly further includes a second slider, the cover plate is fixedly connected to the second slider, and the second slider is movably arranged relative to the first wall portion.

7. The transfer device according to claim 6, characterized in that: The first wall portion is provided with a groove, and the groove is formed by the first wall portion being recessed toward one side of the cover plate. When the cover member and the bearing member are arranged opposite to each other, at least a part of the second sliding block is located in the groove.

8. The transfer device according to claim 1, characterized in that: The electrode assembly comprises a main body and a tab, wherein the tab is protruding from an edge of the main body, and the covering member is used to cover at least one end of the main body close to the tab.

9. The transfer device according to claim 8, characterized in that: The main body includes a side wall, and the pole ear is arranged protruding from the side wall; The covering member further comprises a covering portion and a first limiting portion, wherein the covering portion is arranged opposite to the supporting member, the first limiting portion protrudes from the covering portion along a direction from the covering member toward the supporting member, and the first limiting portion is used to abut against the side wall.

10. The transfer device according to claim 9, characterized in that: The bearing member includes a bearing portion and a second limiting portion, wherein the second limiting portion is arranged to protrude from the bearing portion in a direction from the bearing portion toward the covering member, and the second limiting portion is used to abut against the side wall.

11. The transfer device according to claim 10, characterized in that: At least one of the first limiting portion and the second limiting portion comprises an avoidance opening, and the avoidance opening is used to avoid the tab.

12. A battery production system, characterized in that: include: A transfer device as claimed in any one of claims 1 to 11.

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