Discharging device, winding system and discharging method

Abstract

The invention discloses a discharging device, a winding system and a discharging method, the device comprises a clamping assembly and a driving mechanism, and the driving mechanism is used for driving the clamping assembly to clamp an electrode assembly wound on a winding needle; the clamping assembly comprises a first clamping piece, the first end of the first clamping piece is connected with the driving mechanism, and the first clamping piece is used for being inserted into the inner side of the electrode assembly; the first end of the second clamping piece is connected with the driving mechanism, and the second clamping piece is used for being matched with the first clamping piece to clamp the electrode assembly; and the connecting mechanism is used for connecting the second end of the first clamping piece and the second end of the second clamping piece under the condition that the electrode assembly is clamped by the first clamping piece and the second clamping piece. The device can effectively solve the problem that the clamping assembly is prone to deformation in the discharging process, and helps to improve the production efficiency and the product yield of batteries.

Description

A blanking device, winding system and blanking method Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a blanking device, a winding system, and a blanking method. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of the industry's sustainable development. Battery technology, in turn, is a crucial factor in the development of electric vehicles.

[0003] During battery production, components such as electrode sheets and separators are wound around a winding needle to form an electrode assembly, which is then further processed. Clamping is a common method for removing electrode assemblies from the winding needle. A blanking device clamps the wound electrode assembly and removes it from the winding needle. During the blanking process, the clamping components of the blanking device are prone to deformation, resulting in reduced clamping capacity, collisions with the winding needle, and even damage to the electrode assembly. Therefore, there is an urgent need for a blanking device and method that can improve battery quality and production efficiency.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a blanking device, a winding system and a blanking method. The blanking device can effectively improve the problem that the clamping assembly is easily deformed during the blanking process, thereby reducing the impact of the deformation of the clamping parts of the blanking device on the battery production efficiency and product yield.

[0006] In a first aspect, a blanking device is provided, which includes: a clamping assembly and a driving mechanism, wherein the driving mechanism is used to drive the clamping assembly to clamp the electrode assembly wound on a winding needle; the clamping assembly includes: a first clamping piece, a first end of the first clamping piece is connected to the driving mechanism, and the first clamping piece is used to be inserted into the inner side of the electrode assembly; a second clamping piece, a first end of the second clamping piece is connected to the driving mechanism, and the second clamping piece is used to cooperate with the first clamping piece to clamp the electrode assembly; a connecting mechanism, wherein the connecting mechanism is used to connect the second end of the first clamping piece with the second end of the second clamping piece when the first clamping piece and the second clamping piece clamp the electrode assembly.

[0007] In an embodiment of the present application, the second end of the first clamping member is connected to the second end of the second clamping member through a connecting mechanism, so that the first clamping member and the second clamping member move synchronously in the process of clamping the electrode assembly, and have good and stable clamping capabilities; the second end of the first clamping member is fixed by the connection with the connecting device and is no longer in a cantilever state, thereby making the clamping assembly less likely to deform in the process of clamping the electrode assembly, solving the problems of electrode slippage, wrinkling, breakage, or collision and friction with the winding needle caused by deformation of the clamping assembly, thereby improving the production efficiency and product yield of the battery.

[0008] In some embodiments, the first clamping member and the second clamping member are arranged in parallel.

[0009] In the embodiment of the present application, the electrode assembly is clamped by a first clamping member and a second clamping member that are parallel to each other, so that the electrode assembly is evenly stressed during the clamping process and is not easily deformed or damaged; at the same time, it also helps the winding needle to withdraw from the electrode assembly along the direction in which the first clamping member and the second clamping member extend, reducing the possibility of the winding needle colliding with the clamping assembly when withdrawing from the electrode assembly and damaging the electrode assembly, thereby helping to improve the production efficiency and product yield of the battery.

[0010] In some embodiments, the connecting mechanism includes: a driving module and a connecting module; the driving module is connected to the second clamping member and to the connecting module, and the driving module is used to drive the connecting module to move to a preset position; the connecting module is used to connect to the second end of the first clamping member at the preset position.

[0011] In the embodiment of the present application, the position of the connecting module can be accurately controlled by the driving module driving the connecting module to move to a preset position, thereby achieving accurate connection with the second end of the first clamping member.

[0012] In some embodiments, the second end of the first clamping member is provided with a mating portion, and the mating portion is used to connect with the connection module.

[0013] In an embodiment of the present application, a mating portion is provided at the second end of the first clamping member, which is connected to the connection module through the mating portion, thereby helping to improve the reliability of the connection between the connection module and the second end of the first clamping member.

[0014] In some embodiments, the matching portion is engaged with the connection module, and one of the matching portion and the connection module has a protrusion structure, and the other has a groove structure.

[0015] In the embodiments of the present application, the mating portion is snap-connected with the connecting module, and the connection form is stable and reliable; one of the mating portion and the connecting module is configured as a protrusion structure, and the other is configured as a groove structure. The two are snap-connected and are also easy to process, helping to improve the production efficiency of the blanking device.

[0016] In some embodiments, the driving module includes: a first cylinder connected to the second clamping member, and configured to push the connecting module along an extending direction of the first clamping member.

[0017] In the embodiment of the present application, the first cylinder is used to realize the movement of the connection module in the extension direction of the first clamping member, which can accurately control the position of the connection module in the extension direction of the first clamping member and has the advantages of simple structure and easy implementation.

[0018] In some embodiments, the connection module includes: a rotating structure, which is capable of rotating under the push of the first cylinder to connect with the second end of the first clamping member.

[0019] In the embodiment of the present application, after the first and second clamping members clamp the electrode assembly, the first cylinder drives the rotating structure to rotate, thereby connecting the first and second clamping members. This type of connection mechanism not only allows for flexible connection between the first and second clamping members, but also has the advantages of being simple in structure and easy to implement.

[0020] In some embodiments, the rotating structure includes a pushing part and a rotating part, and the first cylinder is used to push the pushing part; the rotating part includes a straight arm and an arc-shaped arm, one end of the straight arm is rotatably connected to the second end of the second clamping member, and the other end of the straight arm is fixedly connected to one end of the arc-shaped arm and connected to the pushing part, and the other end of the arc-shaped arm is used to be connected to the second end of the first clamping member.

[0021] In an embodiment of the present application, the first cylinder pushes the pushing portion along the extension direction of the first clamping member, and the pushing portion moves along the extension direction of the first clamping member, driving the straight arm to rotate with the connection between it and the second end of the second clamping member as the center of the circle, so that the arc-shaped arm rotates to a preset position where it can be connected to the second end of the first clamping member.

[0022] In some embodiments, a waist-shaped groove is provided on the straight arm, and the pushing portion includes a pushing block, and the pushing block is provided in the waist-shaped groove to realize the rotation of the rotating portion.

[0023] In the embodiment itself, after the pushing portion is pushed by the first cylinder, the pushing block is set in the waist-shaped groove, and the movement of the pushing block drives the waist-shaped groove to move, thereby realizing the rotation of the straight arm.

[0024] In some embodiments, the moving module includes: a second cylinder connected to the first cylinder, and configured to move the connecting module along a first direction perpendicular to an extending direction of the first clamping member.

[0025] In the embodiment of the present application, after the first and second clamping members clamp the electrode assembly, a second cylinder pushes the connecting module to move in the first direction, thereby connecting the first and second clamping members. This type of connection mechanism can precisely control the position of the connecting module in both the extension direction of the first clamping member and the first direction, thereby achieving accurate connection between the first and second clamping members.

[0026] In some embodiments, the connection module includes: a translation structure, which can be moved along the first direction under the push of the second cylinder to connect with the second end of the first clamping member.

[0027] In the embodiments of the present application, after the first and second clamping members clamp the electrode assembly, a second cylinder propels the translational structure to translate in a first direction, thereby connecting the first and second clamping members. This type of connection mechanism not only allows for flexible and accurate connection of the first and second clamping members, but also offers the advantages of a simple structure and ease of implementation.

[0028] In some embodiments, the translation structure includes an L-shaped portion and a connecting block, the L-shaped portion is connected to the second cylinder; one end of the connecting block is fixedly connected to the L-shaped portion, and the other end of the connecting block is used to connect to the second end of the first clamping member.

[0029] In an embodiment of the present application, after the first clamping member and the second clamping member clamp the electrode assembly, the second cylinder can also be used to push the L-shaped portion to move in the first direction, thereby connecting the first clamping member and the second clamping member. When the first cylinder and the second cylinder are used simultaneously, this type of connection mechanism can flexibly move the connection module in the extension direction of the first clamping member and the first direction to achieve connection between the first clamping member and the second clamping member, further improving the flexibility of the connection mechanism. In addition, the L-shaped portion can conform to the shape of the second cylinder, avoiding the winding needle and the device for moving the winding needle. After the blanking device clamps the electrode assembly, the connection mechanism will not block the winding needle, allowing the winding needle to smoothly exit the electrode assembly.

[0030] In some embodiments, a dimension of the first clamping member in the first direction is smaller than a dimension of the second clamping member in the first direction.

[0031] In the embodiment of the present application, the second clamping member has a smaller size in the first direction, which is convenient for extending into the interior of the electrode assembly; the second clamping member has a larger size in the first direction and has greater mechanical strength. The first clamping member is connected to the second clamping member through a connecting mechanism, so that the first clamping member and the second clamping member as a whole are not easily deformed during the process of clamping and stretching the electrode assembly, thereby reducing the impact of the deformation of the clamping assembly on the battery production efficiency and product yield.

[0032] In a second aspect, a winding system is provided, comprising: a winding needle device, the winding needle device comprising a winding needle, the winding needle being used to wind the positive electrode sheet and the negative electrode sheet to form an electrode assembly; and a blanking device as described in any embodiment of the first aspect, the blanking device being used to blank the electrode assembly wound on the winding needle.

[0033] The embodiments of the present application, by using the unloading device in any embodiment of the first aspect in the winding system, help to improve the quality of the electrode assemblies produced by the winding system, and help improve the production efficiency and product yield of the battery.

[0034] In a third aspect, a method for blanking is provided, which includes: driving a clamping assembly through a driving mechanism to clamp the electrode assembly wound on a winding needle, the clamping assembly including a first clamping member and a second clamping member, the first end of the first clamping member being connected to the driving mechanism, the first clamping member being used to be inserted into the inner side of the electrode assembly, the first end of the second clamping member being connected to the driving mechanism, the second clamping member being used to cooperate with the first clamping member to clamp the electrode assembly; connecting the second end of the first clamping member to the second end of the second clamping member through a connecting mechanism; and removing the winding needle.

[0035] In an embodiment of the present application, after the clamping assembly clamps the electrode assembly, the first clamping member and the second clamping member are connected, so that the first clamping member and the second clamping member maintain a high degree of consistency during the process of clamping and stretching the electrode assembly, and the second end of the first clamping member is no longer in a cantilever state and is less likely to deform, thereby improving the impact of the deformation of the clamping assembly on the production efficiency and product yield of the battery. In addition, after connecting the second end of the first clamping member and the second end of the second clamping member, the winding needle is removed, so that during the process of clamping and stretching the electrode assembly by the blanking device, the first clamping member and the second clamping member always remain connected, jointly resisting the reaction force generated by the electrode assembly on the clamping assembly when the electrode assembly is stretched, further reducing the possibility of deformation of the clamping assembly.

[0036] In some embodiments, the connecting mechanism includes a driving module and a connecting module, the driving module is connected to the second clamping member and to the connecting module, and the connecting mechanism connects the second end of the first clamping member with the second end of the second clamping member, including: driving the connecting module to move to a preset position by the driving module; and connecting the second end of the first clamping member at the preset position by the connecting module.

[0037] In the embodiment of the present application, the driving module drives the connecting module to move to a preset position, which helps to improve the efficiency and accuracy of the movement of the connecting module and achieve accurate connection with the second end of the first clamping member.

[0038] In some embodiments, the driving module includes a first cylinder, which is connected to the second end of the second clamping member. Moving the connection module to a preset position through the driving module includes: pushing the connection module to the preset position along the extension direction of the first clamping member through the first cylinder, and the first clamping member is arranged parallel to the second clamping member.

[0039] In an embodiment of the present application, the first cylinder pushes the connecting module to a preset position along the extension direction of the first clamping member, so as to accurately control the position of the connecting module in the extension direction of the first clamping member, thereby improving the accuracy of the connection between the connecting module and the second end of the first clamping member.

[0040] In some embodiments, the driving module includes a second cylinder, which is connected to the first cylinder. Moving the connection module to a preset position through the driving module includes: pushing the connection module to a preset position along a first direction through the second cylinder, and the first direction is perpendicular to the extension direction of the first clamping member.

[0041] In an embodiment of the present application, the second cylinder pushes the connecting module to a preset position along the first direction, so as to accurately control the position of the connecting module in the first direction. Combined with the first cylinder, the connecting module can be moved more flexibly and accurately, thereby further improving the accuracy of the connection between the connecting module and the second end of the first clamping member.

[0042] In some embodiments, the method further includes: driving the connecting module to move by the driving module to release the connection between the second end of the first clamping member and the second end of the second clamping member.

[0043] In an embodiment of the present application, after unloading is completed, the driving module can continue to drive the connecting module to move, thereby releasing the connection between the second end of the first clamping member and the second end of the second clamping member, thereby unloading another electrode assembly, which helps to improve unloading efficiency.

[0044] Therefore, the blanking device and method provided in this application can improve the problem of easy deformation of the clamping assembly during the blanking and stretching process of the electrode assembly, effectively improving the production efficiency and product yield of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 the drawings without creative work.

[0046] FIG1 is a schematic structural diagram of a battery cell of the present application;

[0047] FIG2 is a schematic structural diagram of a blanking device of the present application;

[0048] FIG3 is a schematic cross-sectional view of a winding needle of the present application;

[0049] FIG4 is a schematic structural diagram of a second clamping member of the present application;

[0050] FIG5 is a schematic structural diagram of a first clamping member of the present application;

[0051] FIG6 is a schematic structural diagram of a connecting mechanism of the present application;

[0052] FIG7 is a schematic structural diagram of another blanking device of the present application;

[0053] FIG8 is a schematic structural diagram of another connecting mechanism of the present application;

[0054] FIG9 is a schematic flow chart of a blanking method of the present application;

[0055] FIG10 is another schematic flow chart of a blanking method of the present application. DETAILED DESCRIPTION

[0056] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0058] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0059] The term "and / or" in this application simply describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0061] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0062] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), "multiple pieces" refers to more than two pieces (including two pieces), and multiple columns refers to more than two columns (including two columns).

[0063] In the automotive industry, which uses traditional energy as its power supply, environmental pollution is becoming increasingly serious. Actively developing new energy vehicles can reduce harm to the environment. For new energy vehicles, battery technology is a key factor in their development.

[0064] In this application, a battery refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing prevents liquids or other foreign matter from interfering with the charging or discharging of the battery cells.

[0065] Optionally, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited in the present embodiment. In some embodiments, the battery cell may also be referred to as a battery cell.

[0066] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charge and discharge process, active ions (such as lithium ions) move back and forth between the positive and negative electrode sheets. A separator, placed between the positive and negative electrode sheets, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0067] Structurally, electrode assemblies include wound electrode assemblies and laminated electrode assemblies. Wound electrode assemblies are made by separating long, continuous sheets of positive and negative electrodes with a separator, then winding them around a central pin to create a wound electrode assembly. Laminated electrode assemblies are made by alternately stacking positive and negative electrodes, separated by a separator in a zigzag pattern.

[0068] The development of battery technology must simultaneously consider multiple design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters, in order to improve the safety of batteries in electrical devices.

[0069] In some battery packaging technologies, multiple battery cells are first integrated into a battery module, which is then installed in a battery housing to form a battery pack. In other battery packaging technologies, multiple battery cells can be directly installed in a housing to form a battery pack, eliminating the intermediate battery module, thereby reducing the weight of the battery pack and increasing the battery's energy density. This second packaging technology is also referred to as cell-to-pack packaging technology in related art, and the battery pack may be simply referred to as a battery in this application.

[0070] The positive electrode sheets, negative electrode sheets and separators can be processed into wound electrode assemblies or laminated electrode assemblies through a winding process or a lamination process. During the processing of battery cells using wound electrode assemblies, the electrode assembly is wound around a winding needle. In order to further process the electrode assembly, the electrode assembly needs to be removed from the winding needle, and this process is called blanking. During the blanking process of the electrode assembly, since the internal structure loses the support of the winding needle, the inner layer of the electrode sheets, separators and other structures are prone to loosening. Therefore, the electrode assembly removed from the winding needle also needs to be stretched or flattened. The winding needle is usually provided with a blanking trough or a blanking hole for the blanking device to extend into the interior of the electrode assembly; during the blanking process of the electrode assembly, the electrode assembly is clamped together by a first clamping member extending into the interior of the columnar electrode assembly and a second clamping member outside the electrode assembly, and then the winding needle is pulled out, and the two sets of clamping assemblies are moved away from each other to stretch the electrode assembly to complete the blanking.

[0071] It should be understood that the winding needle has a cylindrical or quasi-cylindrical structure.

[0072] Obviously, since the winding needle is usually an elongated cylindrical or quasi-cylindrical structure, the space reserved for the feeding trough or feeding hole of the first clamping member is very limited. Due to the size of the feeding trough, the radial dimension of the first clamping member is small. Due to the small radial dimension of the first clamping member, and the fact that one end of the first clamping member and the second clamping member are in a cantilever state, the clamping assembly is very susceptible to deformation due to external forces during the process of clamping and stretching the electrode assembly. This makes it easy for the electrode sheet or diaphragm to slip, wrinkle, or break due to uneven force during the process of unloading or stretching the electrode assembly. When the deformation is severe, the first clamping member may also collide or rub with the winding needle, and when the winding needle exits the electrode assembly, it may bring out the electrode sheet or diaphragm inside the electrode assembly, or cause severe deformation inside the electrode assembly, which is not conducive to efficient and high-quality production of batteries.

[0073] In view of this, the present application provides a device and method for unloading, which has a connecting mechanism that can connect to a clamping assembly. After the clamping assembly clamps the electrode assembly, the first clamping member and the second clamping member located inside and outside the electrode assembly are connected, so that the cantilever ends of the first clamping member and the second clamping member are fixed by the connecting device, which can solve the problem that the clamping assembly is easily deformed when clamping or stretching the electrode assembly, thereby helping to improve the production efficiency and product yield of the battery.

[0074] FIG1 is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 21 and an end cap 24. The shell 21 and the end cap 24 form an outer shell or a battery box. The walls of the shell 21 and the end cap 24 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 21 include a bottom wall and four side walls, which are connected to form a receiving space 23 for placing the electrode assembly 22. The shell 21 is determined according to the shape of the one or more electrode assemblies 22 after being combined. For example, the shell 21 can be a hollow cuboid, a cube or a cylinder, and one of the faces of the shell 21 has an opening so that one or more electrode assemblies 22 can be placed in the shell 21. For example, when the shell 21 is a hollow cuboid or a cube, one of the planes of the shell 21 is an open surface, that is, the plane has no wall, so that the inside and outside of the shell 21 are connected. When the housing 21 is a hollow cylinder, the end surface of the housing 21 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 21 are connected. The end cap 24 covers the opening of the accommodating space 23 and is connected to the housing 21 to form a closed cavity for accommodating the electrode assembly 22. The housing 21 is filled with an electrolyte, such as an electrolyte solution.

[0075] The battery cell 20 may also include two electrode terminals 241, which may be mounted on the end cap 24. The end cap 24 is typically flat, with the two electrode terminals 241 secured to the flat surface of the end cap 24. The two electrode terminals 241 are a positive electrode terminal 241a and a negative electrode terminal 241b. Each electrode terminal 241 is provided with a corresponding connecting member 25, also known as a current collecting member, located between the end cap 24 and the electrode assembly 22 to electrically connect the electrode assembly 22 to the electrode terminal 241.

[0076] As shown in FIG1 , each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal 241 via a connecting member 25, and the second electrode tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal 241 via another connecting member 25. For example, the positive electrode terminal 241a is connected to the positive electrode tab via one connecting member 25, and the negative electrode terminal 241b is connected to the negative electrode tab via another connecting member 25.

[0077] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG1 , four independent electrode assemblies 22 are provided in the battery cell 20 .

[0078] Figure 2 is a schematic structural diagram of a blanking device according to an embodiment of the present application. Figure 3 is a cross-sectional view of a winding needle according to an embodiment of the present application. As shown in Figures 2 and 3, the blanking device 400 includes a clamping assembly 401 and a driving mechanism 402.

[0079] The drive mechanism 402 is used to drive the clamping assembly 401 to clamp the electrode assembly 22 wound on the winding needle 30. The clamping assembly 401 includes a first clamping member 4011, a second clamping member 4012, and a connecting mechanism 403. The first end 4011a of the first clamping member 4011 is connected to the drive mechanism 402 and is inserted into the interior of the electrode assembly 22. The first end 4012a of the second clamping member 4012 is connected to the drive mechanism 402 and the second end 4012b of the second clamping member 4012 is used to cooperate with the first clamping member 4011 to clamp the electrode assembly 22. The connecting mechanism 403 is used to connect the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012 when the first and second clamping members 4011 and 4012 are clamping the electrode assembly 22.

[0080] Specifically, during the unloading process of the electrode assembly 22, the first clamping member 4011 is inserted into the interior of the electrode assembly 22, while the second clamping member 4012 is positioned outside the electrode assembly 22. As shown in FIG3 , the winding needle 30 has a feeding slot 301. During unloading, the first clamping member 4011 is driven by the driving mechanism 402 to move, causing the first end 4011a of the first clamping member 4011 to extend into the feeding slot 301 reserved on the winding needle 30, thereby inserting into the interior of the electrode assembly 22. The second clamping member 4012 is also driven by the driving mechanism 402 to move to a position outside the electrode assembly 22 corresponding to the first clamping member 4011. The driving mechanism 402 drives the first clamping member 4011 to apply an outward force to the electrode assembly 22 in the radial direction of the electrode assembly 22. The driving mechanism 402 drives the second clamping member 4012 to apply an inward force to the electrode assembly 22 in the radial direction of the electrode assembly 22. The first clamping member 4011 and the second clamping member 4012 interact with each other inside and outside the electrode assembly 22, thereby clamping the electrode assembly 22 wound on the winding needle 30, allowing the winding needle 30 to be withdrawn from the interior of the electrode assembly 22. The connection between the first clamping member 4011, the second clamping member 4012 and the driving mechanism 402 can be direct or indirect, for example, connected to the driving mechanism 402 through some other device or structure.

[0081] 2, or other structures such as needle-shaped structures, column-shaped structures, etc. that can extend into the feeding chute 301. The second clamping member 4012 can be a plate-shaped structure as shown in FIG2, or other structures such as rod-shaped structures, roller-shaped structures, etc.

[0082] When the first clamping member 4011 and the second clamping member 4012 clamp the electrode assembly 22, the connecting mechanism 403 of the unloading device 400 connects the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012. Thus, the cantilever ends of the first clamping member 4011 and the second clamping member 4012 are connected to each other through the connecting mechanism 403, thereby improving the stability of the second end 4011b of the first clamping member 4011.

[0083] The blanking device 400 of this embodiment connects the second end 4011b of the first clamping member 4011 with the second end 4012b of the second clamping member 4012 by providing a connecting mechanism 403. This allows the first clamping member 4011, which has a weak mechanical strength and a cantilevered second end 4011b, to be connected to the second end 4012b of the second clamping member 4012, which has a greater mechanical strength. As a result, the first clamping member 4011 and the second clamping member 4012 can maintain a connection during the process of clamping and stretching the electrode assembly 22. The connection between the first clamping member 4011 and the second clamping member 4012 can alleviate the problem of deformation of the clamping member 401 during the stretching of the electrode assembly 22, thereby reducing the probability of slippage, wrinkling, or breakage of the electrode sheets within the electrode assembly 22 due to deformation of the clamping member 401, or collision or friction between the clamping member 401 and the winding needle 30 during the blanking process. This effectively improves the product quality of the electrode assembly 22 and helps increase the production efficiency and product yield of the battery 10. On the other hand, the first clamping member 4011 and the second clamping member 4012 are connected through the connecting mechanism 403, so that the first clamping member 4011 and the second clamping member 4012 can maintain highly consistent synchronous movement during the process of clamping and stretching the electrode assembly 22, thereby improving the product quality and production yield of the electrode assembly 22.

[0084] Optionally, as shown in FIG. 2 , the first clamping member 4011 and the second clamping member 4012 are arranged in parallel.

[0085] Specifically, in order to achieve a better clamping effect, the first clamping member 4011 and the second clamping member 4012 can be set to be parallel to each other, thereby enabling the electrode assembly 22 clamped between the first clamping member 4011 and the second clamping member 4012 to be subjected to uniform force and not easily deformed or damaged during the clamping process, thereby helping to improve the production efficiency and product yield of the battery cell 20 and the battery 10.

[0086] Furthermore, illustratively, when the first clamping member 4011 and the second clamping member 4012 clamp the electrode assembly 22, the extension direction of the clamped electrode assembly 22 is parallel to the extension direction x of the first clamping member 4011. At this time, the winding needle 30 located inside the electrode assembly 22 is also parallel to the extension direction x of the first clamping member 4011. In other words, the winding needle 30 and the first clamping member 4011 are parallel to each other. This allows the winding needle 30 to move along the extension direction x of the first clamping member 4011 and exit the electrode assembly 22 after being clamped. This reduces the possibility of friction or collision between the winding needle 30 and the first clamping member 4011 during the process of exiting the electrode assembly 22, thereby damaging the electrode assembly. This improves the production efficiency and product yield of the battery cells 20.

[0087] FIG4 is a schematic diagram of a second clamping member 4012 of the present application.

[0088] Alternatively, referring to Figures 2 and 4 , the connection mechanism 403 includes a driving module 4031 and a connecting module 4032. The driving module 4031 is connected to the second clamping member 4012 and to the connecting module 4032. The driving module 4031 is configured to drive the connecting module 4032 to a predetermined position, where the connecting module 4032 is configured to connect to the second end 4011b of the first clamping member 4011 at the predetermined position.

[0089] Specifically, the second clamping member 4012 may be provided with a structure for connecting the connecting mechanism 403, such as a notch or connecting hole as shown in FIG4 , so that the connecting mechanism 403 can be directly disposed on the second clamping member 4012 and move with the movement of the second clamping member 4012. When the clamping assembly 401 is clamping the electrode assembly 22, the driving module 4031 disposed on the second clamping member 4012 moves the connecting module 4032 to a preset position, whereupon the connecting module 4032 reaches the preset position and connects to the second end 4011b of the first clamping member 4011. The preset position may be any position to which the connecting module 4032 can be moved by the driving module 4031.

[0090] Figure 5 is a schematic diagram of a first clamping member 4011 according to an embodiment of the present application. Figure 6 is a schematic diagram of a connecting mechanism 403 according to an embodiment of the present application.

[0091] Optionally, the second end 4011 b of the first clamping member 4011 is provided with a mating portion 50 , and the mating portion 50 is used to connect with the connecting module 4032 .

[0092] The connecting module 4032 and the mating portion 50 can form a snap or lock structure, such as a buckle, that can stably connect the second end 4011b of the first clamping member 4011 to the second end 4012b of the second clamping member 4012, and release the connection under certain conditions. In one embodiment, the mating portion 50 has a track structure. The mating portion 50 is configured to lock the connecting module 4032 when the connecting module 4032 moves along the track to a predetermined position. The mating portion 50 is also configured to release the lock on the connecting module 4032, allowing the connecting module 4032 to detach from the track. In this case, the predetermined position can be any suitable position within the track.

[0093] Optionally, referring to FIG. 5 and FIG. 6 , the mating portion 50 is engaged with the connecting module 4032 , and one of the mating portion 50 and the connecting module 4032 has a protrusion structure, and the other has a groove structure.

[0094] Specifically, the mating portion 50 may have a circular groove. In another example, the mating portion 50 may also be a square, triangular or other shaped groove. In the case where the mating portion 50 has a groove structure, the connecting module 4032 has a protrusion that engages with the groove. As shown in Figure 6, the protrusion may be a truncated cone-shaped protrusion that can engage with the circular groove. In other examples, the protrusion may also be a conical, cylindrical, elliptical, triangular or other shaped protrusion. In a preferred embodiment, the groove and the protrusion have shapes that adapt to each other. For example, the mating portion 50 has a circular groove, and the connecting module 4032 has a cylindrical, truncated cone or conical protrusion. For another example, the mating portion has a triangular groove, and the connecting module 4032 has a triangular prism or triangular pyramidal protrusion.

[0095] During the blanking process, the driving module 4031 drives the connecting module 4032 to move to a preset position. At this point, the protrusion of the connecting module 4032 is aligned with the groove of the mating portion 50, and the protrusion is sunk into the groove, causing the connecting module 4032 to engage with the mating portion 50. After blanking is completed, the driving module 4031 can move the connecting module 4032 to another position outside the preset position, so that the protrusion is no longer aligned with the groove and the protrusion is removed from the groove, thereby releasing the engagement between the connecting module 4032 and the mating portion 50.

[0096] It should be understood that Figures 5 and 6 only illustrate an example in which the mating portion 50 has one groove and the connecting module 4032 has one protrusion. In other examples, to increase the reliability of the engagement between the connecting module 4032 and the mating portion 50, the number of grooves and protrusions may be multiple. The number of grooves and protrusions may be the same or different. For example, when the electrode assembly 22 has a large number of windings and is thick, the mating portion 50 may have multiple grooves and the connecting module 4032 may have multiple protrusions. The multiple grooves and protrusions may engage with each other to achieve a more reliable connection. When the electrode assembly 22 has a small number of windings and a moderate thickness, a reliable connection may be achieved with one groove on the mating portion 50 and one protrusion on the connecting module 4032. The grooves and protrusions may correspond one-to-one, with one groove corresponding to one protrusion, or one groove may engage with multiple protrusions. Furthermore, the groove structure of the mating portion 50 may be removable, allowing for flexible configurations with varying numbers of grooves to meet varying connection strength requirements. Alternatively, the protrusions of the connection module 4032 can be configured as a detachable structure, and the number of the protrusions can be set according to actual needs.

[0097] In one embodiment, the mating portion 50 may comprise a channel structure, and the connecting module 4032 may comprise a protrusion that engages with the channel structure. In some embodiments, the mating portion 50 may comprise a channel structure that extends through or partially extends through the first clamping member 4011 in the extension direction x of the first clamping member 4011. In this case, the protrusion of the connecting module 4032 may engage with the channel structure, thereby achieving connection between the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012.

[0098] In another example, the mating portion 50 may have a projection in a conical, cylindrical, elliptical, triangular, truncated cone, or other shape. The connecting module 4032 may have a groove capable of engaging with the projection. The groove may have a shape that is compatible with the groove.

[0099] In addition, the blanking device 400 may include multiple groups of clamping assemblies 401 , for example, two groups of clamping assemblies 401 .

[0100] Next, the driving module 4031 that drives the connection module 4032 is introduced.

[0101] Optionally, as shown in FIG. 2 and FIG. 6 , the driving module 4031 includes a first cylinder 60 connected to the second end 4012 b of the second clamping member 4012 for pushing the connecting module 4032 along the extending direction x of the first clamping member 4011 .

[0102] The piston in the first cylinder 60 can move linearly along the extension direction x of the first clamping member 4011. Thus, the first cylinder 60 can push the connecting module 4032 connected to it along the extension direction x of the first clamping member 4011, so that the connecting module 4032 moves to a preset position where it can be connected to the second end 4011b of the first clamping member 4011.

[0103] Optionally, as shown in FIG. 6 , the connection module 4032 includes a rotating structure 70 . The rotating structure 70 can be rotated under the push of the first cylinder 60 to connect with the second end 4011 b of the first clamping member 4011 .

[0104] Specifically, the connection module 4032 may include a rotating structure 70 . Under the push of the first cylinder 60 , the rotating structure 70 rotates, so that the connection module 4032 moves to a preset position where it can be connected to the second end 4011 b of the first clamping member 4011 .

[0105] Optionally, please continue to refer to Figure 6. The rotating structure 70 includes a pushing part 701 and a rotating part 702. The first cylinder 60 is used to push the pushing part 701; the rotating part 702 includes a straight arm 7021 and an arc-shaped arm 7022. One end of the straight arm 7021 is rotatably connected to the second end 4012b of the second clamping member 4012, and the other end of the straight arm 7021 is fixedly connected to one end of the arc-shaped arm 7022 and connected to the pushing part 701. The other end of the arc-shaped arm 7022 is used to be connected to the second end 4011b of the first clamping member 4011.

[0106] Optionally, a waist-shaped groove 7021 a is provided on the straight arm 7021 , and the pushing portion 701 includes a pushing block 7011 , which is disposed in the waist-shaped groove 7021 a to realize the rotation of the rotating portion 702 .

[0107] Specifically, when the electrode assembly 22 is clamped by the first clamping member 4011 and the second clamping member 4012, the first cylinder 60 pushes the push block 7011 of the push portion 701 along the extension direction x of the first clamping member 4011. As the push block 7011 moves, the waist-shaped groove 7021a moves, causing the straight arm 7021 to rotate about the connection point between the straight arm 7021 and the second end 4012b of the second clamping member 4012. Consequently, the arcuate arm 7022, connected to the other end of the straight arm 7021, rotates along with the rotation of the straight arm 7021. When the first cylinder 60 pushes the push portion 702 a fixed distance along the extension direction x of the first clamping member 4011, the other end of the arcuate arm 7022 rotates to a position where it can connect with the second end 4011b of the first clamping member 4011. More specifically, a slot may be provided at the other end of the arc-shaped arm 7022 to engage with the second end 4011 b of the first clamping member 4011 .

[0108] It should be understood that the rotating structure 70 may be in the form of a pushing portion 701 plus a rotating portion 702 as shown in the embodiment of FIG6 . In some other embodiments, the shape and structure of the rotating portion 702 may be designed so that the rotating structure 70 only includes the rotating portion 702. Alternatively, the rotating structure 70 may be in another form that can be pushed by the first cylinder 60 to move the connecting module 4032 to a predetermined position.

[0109] In this embodiment, when the electrode assembly 22 is clamped, the first cylinder 60 provided on the second clamping member 4012 pushes the pushing portion 701 of the rotating structure 70, allowing the other end of the rotating portion 702 to connect with the second end 4011b of the first clamping member 4011. This flexibly achieves the connection between the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012. Furthermore, this type of connecting mechanism 403 has the advantages of being simple in structure and easy to implement.

[0110] Figure 7 is a schematic diagram of another material unloading device according to an embodiment of the present application. Figure 8 is a schematic diagram of another connection mechanism 403 according to an embodiment of the present application.

[0111] 7 and 8 , optionally, the driving module 4031 includes a second cylinder 80 connected to the first cylinder 60 for moving the connecting module 4032 along a first direction y perpendicular to the extending direction x of the first clamping member 4011 .

[0112] The piston in the second cylinder 80 can move linearly along the first direction y. Thus, the second cylinder 80 can push the connecting module 4032 connected thereto along the first direction y, causing the connecting module 4032 to move to a predetermined position where it can connect with the second end 4011b of the first clamping member 4011. The second cylinder 80 can be directly connected to the first cylinder 60 or connected to the first cylinder 60 via some other structure.

[0113] In the embodiments shown in Figures 7 and 8, the driving module 4031 includes a first cylinder 60 and a second cylinder 80. In some other embodiments, the driving module 4031 may include only the second cylinder 80. For example, the second cylinder 80 is directly connected to the second clamping member 4012, and the driving module 4031 protrudes from the second end 4012b of the second clamping member 4012 in the extension direction x of the first clamping member 4011, and the connecting module 4032 is connected to the second cylinder 80. When the electrode assembly 22 is clamped, the second cylinder pushes the connecting module 4032 along the first direction y, causing the connecting module 4032 to move to a predetermined position where it can connect with the second end 4011b of the first clamping member 4011.

[0114] In this embodiment, by setting the first cylinder 60 and the second cylinder 80 in the driving module 4031, the connecting module 4032 can be flexibly moved in the extension direction x and the first direction y of the first clamping member 4011, and the position that the driving module 4031 can finally reach can be controlled by controlling the moving distance of the first cylinder 60 and the second cylinder 80 in the two directions, so that the unloading device 400 can adapt to more different models of winding needles 30.

[0115] Optionally, the connecting module 4032 includes a translation structure 90 , which can be moved along the first direction y under the push of the second cylinder 80 to connect with the second end 4011 b of the first clamping member 4011 .

[0116] Optionally, as shown in FIG8 , the translation structure 90 includes an L-shaped portion 901 and a connecting block 902 . The L-shaped portion 901 is connected to the second cylinder 80 ; one end of the connecting block 902 is fixedly connected to the L-shaped portion 901 , and the other end of the connecting block 902 is used to connect to the second end 4011 b of the first clamping member 4011 .

[0117] Specifically, with the electrode assembly 22 clamped, the first cylinder 60 pushes the second cylinder 80 along the extension direction x of the first clamping member 4011, causing the second cylinder 80 and the connecting module 4032 connected to the second cylinder 80 to move along the extension direction x of the first clamping member 4011. Subsequently, the second cylinder 80 pushes the L-shaped portion 901 of the translation structure 90 along the first direction y, causing the L-shaped portion 901 and the connecting block 902 to move along the first direction y. When the second cylinder 80 pushes the L-shaped portion 901 a fixed distance along the first direction y, the end of the connecting block 902 away from the L-shaped portion 901 is aligned with the mating portion 50 of the second end 4011b of the first clamping member 4011. In other words, the end of the connecting block 902 away from the L-shaped portion 901 is moved to a position where it can connect with the second end 4011b of the first clamping member 4011.

[0118] In the embodiment shown in Figures 7 and 8, the second cylinder 80 has a cubical shape, and the L-shaped portion 901 can adapt to the cubical shape. In some other embodiments, the second cylinder 80 may have a cylindrical shape or other shapes, and the L-shaped portion 901 may have other shapes, for example, having a structure that adapts to the cylindrical shape or other shapes.

[0119] In this embodiment, when the electrode assembly 22 is clamped, the connecting module 4032 having the L-shaped portion 901 and the connecting block 902 is moved in the extension direction x and the first direction y of the first clamping member 4011 by the first cylinder 60 arranged on the second clamping member 4012 and the second cylinder 80 connected to the first cylinder 60, respectively, so that the end of the connecting block 902 away from the L-shaped portion 901 can be connected to the second end 4011b of the first clamping member 4011, thereby more flexibly realizing the connection between the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012. In addition, the design of the L-shaped portion 901 and the connecting block 902 allows the winding needle 30 to be smoothly moved out when the second end 4011b of the first clamping member 4011 is connected to the second end 4012b of the second clamping member 4012, effectively reducing the collision or friction between the winding needle 30 and the connecting mechanism 403 during the process of exiting the electrode assembly 22. During the entire process of clamping and stretching the electrode assembly 22, the first clamping member 4011 and the second clamping member 4012 remain connected, jointly resisting the reaction force generated by the electrode assembly 22 on the clamping assembly 401 when the electrode assembly 22 is stretched, and reducing the possibility of deformation of the clamping assembly 401.

[0120] 7 , a limiter 81 is provided on the second cylinder 80 to limit the distance that the second cylinder 80 pushes the connecting module 4032 along the first direction y. The limiter 81 can accurately control the distance and position of the connecting module 4032 being moved.

[0121] It should be understood that, although not shown in the drawings, similar to the second cylinder 80 , a limit portion may also be provided on the first cylinder 60 to limit the distance the first cylinder 60 pushes the connecting module 4032 along the extension direction x of the first clamping member 4011 .

[0122] Optionally, referring to FIG. 4 and FIG. 5 , a dimension of the first clamping member 4011 in the first direction y is smaller than a dimension of the second clamping member 4012 in the first direction y.

[0123] Specifically, due to the extremely limited space within the electrode assembly 22, the first clamping member 4011 is relatively small in the first direction y. The second clamping member 4012, however, is located outside the electrode assembly 22. To ensure greater mechanical strength, the second clamping member 4012 can be designed to be larger in the first direction y. For example, the first clamping member 4011, which is intended to extend into the feed chute 301, can be designed as a needle-like structure, while the second clamping member 4012 can be configured as a plate-like structure with greater mechanical strength.

[0124] For another example, in some other embodiments, the first clamping member 4011 and the second clamping member 4012 may be roller-shaped structures, or plate-shaped structures of different sizes, or respectively be roller-shaped structures, plate-shaped structures, etc.

[0125] In this embodiment, the first clamping member 4011 has a relatively small dimension in the first direction y, making it easier to insert into the limited interior of the electrode assembly 22 for blanking. The second clamping member 4012 has a relatively large dimension in the first direction y, providing high mechanical strength and effectively resisting the reaction force exerted by the electrode assembly 22 on the second clamping member 4012 when clamping and stretching the electrode assembly 22. Furthermore, the second end 4012b of the second clamping member 4012 is connected to the connecting mechanism 403. Its larger dimension in the first direction y facilitates further processing and reduces the difficulty of installing the connecting mechanism 403 at the second end 4012b of the second clamping member 4012. Thus, throughout the blanking process of the electrode assembly 22, the first clamping member 4011 and the second clamping member 4012 are always connected via the connecting mechanism 403, effectively alleviating the problem of deformation of the clamping member 401 during blanking, thereby helping to improve the production efficiency and product yield of the battery 10.

[0126] The present application also provides a winding system comprising a winding needle device and a blanking device 400 according to any of the above embodiments. The winding needle device comprises a winding needle 30 for winding positive and negative electrode sheets to form an electrode assembly, and the blanking device 400 for blanking the electrode assembly 22 wound on the winding needle 30.

[0127] In addition, the embodiment of the present application further provides a blanking method, as shown in FIG9 , the blanking method 1100 includes:

[0128] S1101 , the driving mechanism 402 drives the clamping assembly 401 to clamp the electrode assembly 22 wound on the winding needle 30 .

[0129] S1102 , connecting the second end 4011 b of the first clamping member 4011 and the second end 4012 b of the second clamping member 4012 through the connecting mechanism 403 .

[0130] S1103, remove the winding needle 30.

[0131] The clamping assembly 401 includes a first clamping member 4011 and a second clamping member 4012. The first end 4011a of the first clamping member 4011 is connected to the drive mechanism 402. The first clamping member 4011 is used to be inserted into the discharge chute 301 of the winding needle 30. The first end 4012a of the second clamping member 4012 is connected to the drive mechanism 402. The second clamping member 4012 is used to cooperate with the first clamping member 4011 to clamp the electrode assembly 22.

[0132] Specifically, during the blanking process of the electrode assembly 22, after the first clamping member 4011 and the second clamping member 4012 respectively clamp the electrode assembly 22 inside and outside the electrode assembly 22, the second end 4011b of the first clamping member 4011 is connected to the second end 4012b of the second clamping member 4012 via the connecting mechanism 403, and then the winding needle 30 is removed from the electrode assembly 22. The connection in step S1202 eliminates the second end 4011b of the first clamping member 4011 and the second end 4012b of the second clamping member 4012 from being in a cantilevered state, effectively improving the overall deformation resistance of the clamping assembly 401. Moreover, throughout the entire blanking process of the electrode assembly 22, the movements of the first clamping member 4011 and the second clamping member 4012 remain highly consistent. This eliminates the adverse effects of deformation of the clamping assembly 401 during the blanking process on the production of the battery 10, thereby improving the production efficiency and product yield of the battery 10.

[0133] Optionally, step S1102 includes:

[0134] S1102a, driving the connecting module 4032 to move to a preset position via the driving module 4031.

[0135] S1102b, connecting the second end 4011b of the first clamping member 4011 at a preset position through the connecting module 4032.

[0136] The connecting mechanism 403 includes a driving module 4031 and a connecting module 4032. The driving module 4031 is connected to the second clamping member 4012 and is also connected to the connecting module 4032.

[0137] Optionally, in S1102a , the connecting module 4032 is pushed to a preset position along the extension direction x of the first clamping member 4011 by the first cylinder 60 , and the first clamping member 4011 and the second clamping member 4012 are arranged in parallel.

[0138] The driving module 4031 includes a first cylinder 60 , the first cylinder 60 and a second clamping member 4012 .

[0139] Optionally, in S1102a , the connecting module 4032 is pushed to a preset position along a first direction y by the second cylinder 80 , where the first direction y is perpendicular to the extending direction x of the first clamping member 4011 .

[0140] The driving module 4031 includes a second cylinder 80 , and the second cylinder 80 is connected to the first cylinder 60 .

[0141] FIG10 is another schematic flow chart of the blanking method 1100 provided in the present application.

[0142] Optionally, as shown in FIG10 , the method 1100 further includes:

[0143] S1104 , driving the connecting module 4032 to move via the driving module 4031 to release the connection between the second end 4011 b of the first clamping member 4011 and the second end 4012 b of the second clamping member 4012 .

[0144] In summary, the blanking device 400 provided in the embodiment of the present application connects the first clamping member 4011 and the second clamping member 4012 that clamp the electrode assembly 22 through the connecting mechanism 403, so that the clamping assembly 401 no longer has a cantilever end, effectively solving the problem of easy deformation of the first clamping member 4011, and allowing the two clamping members to maintain highly consistent movement during the blanking process, solving the adverse effects of the clamping assembly 401 on the production of the battery 10 during the blanking process, and helping to improve the production efficiency and product yield of the battery 10. The blanking method 1100 provided in the embodiment of the present application is implemented by using the blanking device 400, and can achieve similar effects as the blanking device 400.

[0145] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A blanking device, characterized in that, The blanking device includes: a clamping assembly (401) and a driving mechanism (402), where the driving mechanism (402) is used to drive the clamping assembly (401) to clamp the electrode assembly (22) wound around the winding needle (30); The clamping assembly (401) includes: a first clamping member (4011), the first end (4011a) of the first clamping member (4011) is connected to the driving mechanism (402), and the first clamping member (4011) is used to insert into the inner side of the electrode assembly (22); a second clamping member (4012), the first end (4012a) of the second clamping member (4012) is connected to the driving mechanism (402), and the second clamping member (4012) is used to cooperate with the first clamping member (4011) to clamp the electrode assembly (22); a connecting mechanism (403), the connecting mechanism (403) is used to connect the second end (4011b) of the first clamping member (4011) and the second end (4012b) of the second clamping member (4012) when the first clamping member (4011) and the second clamping member (4012) clamp the electrode assembly (22).

2. The blanking device according to claim 1, wherein The first clamping member (4011) and the second clamping member (4012) are arranged in parallel.

3. The blanking device according to claim 1 or 2, characterized in that, The connecting mechanism (403) includes: a driving module (4031) and a connecting module (4032); The driving module (4031) is connected to the second clamping member (4012) and is connected to the connecting module (4032), and the driving module (4031) is used to drive the connecting module (4032) to move to a preset position; The connecting module (4032) is used to connect to the second end (4011b) of the first clamping member (4011) at the preset position.

4. The blanking device according to claim 3, characterized in that, A matching portion (50) is provided at the second end (4011b) of the first clamping member (4011), and the matching portion (50) is used to connect to the connecting module (4032).

5. The blanking device according to claim 4, characterized in that, The matching portion (50) is snap-connected to the connecting module (4032), and one of the matching portion (50) and the connecting module (4032) has a convex block structure and the other has a groove structure.

6. The blanking device according to any one of claims 3-5, characterized in that, The driving module (4031) includes: a first air cylinder (60), the first air cylinder (60) is connected to the second clamping member (4012) and is used to push the connecting module (4032) along the extending direction (x) of the first clamping member (4011).

7. The blanking device according to claim 6, characterized in that, The connecting module (4032) includes: a rotating structure (70), the rotating structure (70) can rotate under the push of the first air cylinder (60) to connect to the second end (4011b) of the first clamping member (4011).

8. The blanking device according to claim 7, characterized in that, The rotating structure (70) includes a pushing portion (701) and a rotating portion (702), and the first air cylinder (60) is used to push the pushing portion (701); The rotating part (702) includes a straight arm (7021) and an arc arm (7022). One end of the straight arm (7021) is rotatably connected to the second end (4012b) of the second clamping part (4012). The other end of the straight arm (7021) is fixedly connected to one end of the arc arm (7022) and is connected to the pushing part (701). The other end of the arc arm (7022) is used to be connected to the second end (4011b) of the first clamping part (4011).

9. The blanking device according to claim 8, characterized in that, A waist-shaped groove (7021a) is provided on the straight arm (7021). The pushing part (701) includes a pushing block (7011). The pushing block (7011) is arranged in the waist-shaped groove (7021a) to realize the rotation of the rotating part (702).

10. The blanking device according to any one of claims 6-9, characterized in that, The driving module (4031) includes: A second air cylinder (80). The second air cylinder (80) is connected to the first air cylinder (60) and is used to move the connection module (4032) along a first direction (y). The first direction (y) is perpendicular to the extending direction (x) of the first clamping part (4011).

11. The blanking device according to claim 10, characterized in that, The connection module (4032) includes: A translation structure (90). The translation structure (90) can move along the first direction (y) under the push of the second air cylinder (80) to be connected to the second end (4011b) of the first clamping part (4011).

12. The blanking device according to claim 11, characterized in that, The translation structure (90) includes an L-shaped part (901) and a connection block (902). The L-shaped part (901) is connected to the second air cylinder (80). One end of the connection block (902) is fixedly connected to the L-shaped part (901). The other end of the connection block (902) is used to be connected to the second end (4011b) of the first clamping part (4011).

13. The blanking device according to any one of claims 10-12, characterized in that, The dimension of the first clamping part (4011) in the first direction (y) is smaller than the dimension of the second clamping part (4012) in the first direction (y).

14. A winding system, characterized in that, The winding system includes: A winding needle device. The winding needle device includes a winding needle (30). The winding needle (30) is used to wind the positive electrode sheet and the negative electrode sheet to form an electrode assembly (22). The blanking device (400) according to any one of claims 1-13. The blanking device (400) is used to blank the electrode assembly (22) wound on the winding needle (30).

15. A blanking method, characterized in that, The blanking method includes: Drive the clamping assembly (401) to clamp the electrode assembly (22) wound around the winding pin (30) through the drive mechanism (402). The clamping assembly (401) includes a first clamping member (4011) and a second clamping member (4012). The first end (4011a) of the first clamping member (4011) is connected to the drive mechanism (402). The first clamping member (4011) is used to insert into the inside of the electrode assembly (22). The first end (4012a) of the second clamping member (4012) is connected to the drive mechanism (402). The second clamping member (4012) is used to cooperate with the first clamping member (4011) to clamp the electrode assembly (22). Connect the second end (4011b) of the first clamping member (4011) and the second end (4012b) of the second clamping member (4012) through the connecting mechanism (403). Remove the winding pin (30).

16. The blanking method according to claim 15, characterized in that, The connecting mechanism (403) includes a drive module (4031) and a connecting module (4032). The drive module (4031) is connected to the second clamping member (4012) and is connected to the connecting module (4032). Connecting the second end (4011b) of the first clamping member (4011) and the second end (4012b) of the second clamping member (4012) through the connecting mechanism (403) includes: Drive the connecting module (4032) to move to a preset position through the drive module (4031). Connect the second end (4011b) of the first clamping member (4011) at the preset position through the connecting module (4032).

17. The blanking method according to claim 16, wherein The drive module (4031) includes a first air cylinder (60). The first air cylinder (60) is connected to the second clamping member (4012). Driving the connecting module (4032) to move to a preset position through the drive module (4031) includes: Push the connecting module (4032) to the preset position along the extending direction (x) of the first clamping member (4011) through the first air cylinder (60). The first clamping member (4011) and the second clamping member (4012) are arranged in parallel.

18. The blanking method according to claim 17, wherein The drive module (4031) includes a second air cylinder (80). The second air cylinder (80) is connected to the first air cylinder (60). Driving the connecting module (4032) to move to a preset position through the drive module (4031) includes: Push the connecting module (4032) to the preset position along the first direction (y) through the second air cylinder (80). The first direction (y) is perpendicular to the extending direction (x) of the first clamping member (4011).

19. The blanking method according to any one of claims 16-18, characterized in that, The method further includes: Drive the connecting module (4032) to move through the drive module (4031) to release the connection between the second end (4011b) of the first clamping member (4011) and the second end (4012b) of the second clamping member (4012).

Images