Discharging equipment and winding system

Abstract

The discharging equipment is used for discharging an electrode assembly wound on a winding needle and comprises a first clamping jaw, at least part of the first clamping jaw is inserted into the electrode assembly, the first clamping jaw is opposite to the inner side of the electrode assembly, the first clamping jaw is provided with an air outlet, and the air outlet is used for blowing air to the electrode assembly; and the second clamping jaw is used for being opposite to the outer side of the electrode assembly, and the second clamping jaw is configured to be matched with the first clamping jaw to clamp the electrode assembly so as to take down the electrode assembly from the winding needle. According to the technical scheme, the quality of the electrode assembly can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a discharging device and a winding system. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The development of battery technology needs to consider many design factors, such as energy density, cycle life, discharge capacity, and charge-discharge rate. The quality of the electrode assembly is an important factor affecting the performance of the battery, so how to improve the quality of the electrode assembly is a problem to be solved. CONTENT OF THE INVENTION

[0004] The present application provides a discharging device and a winding system, which can improve the quality of the electrode assembly.

[0005] In a first aspect, a discharging device is provided for discharging an electrode assembly wound on a winding needle. The discharging device includes a first jaw, at least a portion of the first jaw being inserted into the electrode assembly and opposite to an inner side of the electrode assembly, the first jaw being provided with an air outlet for blowing air to the electrode assembly; and a second jaw opposite to an outer side of the electrode assembly, the second jaw being configured to cooperate with the first jaw to clamp the electrode assembly to remove the electrode assembly from the winding needle.

[0006] In the present application, the discharging device includes a first jaw and a second jaw, at least a portion of the first jaw is inserted into the electrode assembly and opposite to an inner side of the electrode assembly, the second jaw is opposite to an outer side of the electrode assembly, and the first jaw and the second jaw cooperate to clamp the electrode assembly to remove the electrode assembly from the winding needle. Specifically, the first jaw is provided with an air outlet, after the first jaw removes the electrode assembly from the winding needle, the first jaw moves in a direction away from the electrode assembly to place the electrode assembly on a conveying device. Before and during the movement of the first jaw, the air outlet on the first jaw blows air to the electrode assembly, so that the electrode assembly is lifted away from the first jaw. In this way, the inner layer of the electrode assembly will not be adsorbed to the outer periphery of the first jaw, and the friction between the first jaw and the inner layer of the electrode assembly is small when the first jaw moves, so that the electrode assembly can be smoothly removed, reducing the possibility of damage to the electrode assembly caused by the discharging device pulling out the needle, thereby improving the quality of the electrode assembly.

[0007] In one possible implementation, the discharging device includes two first jaws, and the two first jaws are movable relative to each other.

[0008] The two first clamping jaws are movable relative to each other, so that the shape of the electrode assembly can be changed by changing the relative positions of the two first clamping jaws.

[0009] In a possible implementation, the first clamping jaw comprises a clamping jaw body and a base connected to the clamping jaw body, the clamping jaw body is used for being inserted into the hollow region of the electrode assembly, and the gas outlet is arranged on the outer periphery of the clamping jaw body.

[0010] The clamping jaw body of the first clamping jaw is inserted into the hollow region of the electrode assembly, and the clamping jaw body supports and fixes the electrode assembly during the process of withdrawing the winding needle from the hollow region of the electrode assembly, so that the winding needle can be smoothly withdrawn from the hollow region of the electrode assembly. The gas outlet is arranged on the outer periphery of the clamping jaw body, can blow gas directly to the inner layer of the electrode assembly, and forms an air layer between the clamping jaw body and the inner layer of the electrode assembly, so that the first clamping jaw can be smoothly separated from the electrode assembly and the possibility of damaging the electrode assembly is reduced.

[0011] In a possible implementation, the gas outlet is arranged on the upper surface and the lower surface of the clamping jaw body.

[0012] The gas outlet is arranged on the upper surface and the lower surface of the clamping jaw body, so that the inner layer of the electrode assembly opposite to the upper surface and the lower surface of the clamping jaw body is blown by the gas outlet, thereby forming an air layer between the upper surface and the lower surface of the clamping jaw body and the inner layer of the electrode assembly, facilitating the separation of the first clamping jaw from the electrode assembly, and reducing the possibility of damaging the electrode assembly.

[0013] In a possible implementation, the base is provided with an air inlet, and the first clamping jaw is internally provided with a gas blowing channel connecting the air inlet and the gas outlet.

[0014] The air inlet is arranged on the base, facilitating the introduction of gas into the air inlet, and the gas blowing channel is arranged in the first clamping jaw, so that the gas introduced into the air inlet can flow through the gas blowing channel to the gas outlet. The gas blowing channel can guide the flow of the gas introduced into the air inlet, so that the position of the gas outlet can be set according to actual operation needs without affecting the discharge of the gas outlet.

[0015] In a possible implementation, the gas blowing channel comprises a main channel and a plurality of sub-channels in communication with the main channel, the main channel is connected with the air inlet, and the at least one sub-channel is connected with the gas outlet.

[0016] The main channel is connected with the air inlet, external air enters the main channel through the air inlet, and then diffuses from the main channel to the multiple sub-channels, and then reaches the air outlet through the sub-channels, and then ventilates to the electrode assembly through the air outlet, so that the electrode assembly is supported away from the first clamp, the first clamp can be smoothly separated from the electrode assembly, and the electrode assembly is prevented from being damaged.

[0017] In a possible implementation, the main channel extends along a direction parallel to the extension of the clamp body.

[0018] The main channel extends along a direction parallel to the extension of the clamp body, so that after external air enters the main channel through the air inlet, the external air can fill the entire main channel along the direction in which the clamp body extends, so that the gas in the main channel can quickly diffuse to each sub-channel.

[0019] In a possible implementation, the sub-channels extend along a direction perpendicular to the extension of the clamp body.

[0020] The air outlet is arranged on the outer periphery of the clamp body, and the sub-channels extend along a direction perpendicular to the extension of the clamp body, so as to be connected with the air outlet, thereby guiding the gas in the air blowing channel to the air outlet, and the flow direction of the gas discharged from the air outlet is a straight line, so that the electrode assembly can be supported away from the first clamp along the straight line, rather than an inclined direction, and the shape of the electrode assembly is not damaged.

[0021] In a possible implementation, the cross-sectional area of the main channel is greater than the cross-sectional area of the sub-channels.

[0022] The cross-sectional area of the main channel is large, so that a sufficient amount of gas can be introduced into the clamp body, and the gas discharged from the air outlet can meet the needs of supporting the electrode assembly away from the first clamp, and meanwhile, the cross-sectional area of each sub-channel is small, the space occupied by the air blowing channel in the clamp body is reduced, the solid area of the clamp body is increased, the structural strength and rigidity of the clamp body are improved, and the electrode assembly is stably supported.

[0023] In a possible implementation, a pressure sensor is arranged on the outer periphery of the clamp body, and the pressure sensor is used to acquire the pressure value of the electrode assembly on the outer periphery of the clamp body.

[0024] The pressure sensor is used to acquire the pressure value of the electrode assembly on the outer periphery of the clamp body, so as to master the fitting condition of the electrode assembly on the outer periphery of the clamp body.

[0025] In a possible implementation, the pressure sensor is arranged on the upper surface and / or the lower surface of the clamp body.

[0026] When the jaw body is inserted into the hollow region of the electrode assembly to support the electrode assembly, the electrode assembly will generate a large pressure on the upper surface of the jaw body due to gravity; at the same time, due to electrostatic action, the electrode assembly will adhere to the jaw body, generating pressure on the upper surface and the lower surface of the jaw body. The pressure sensor is arranged on the upper surface and / or the lower surface of the jaw body to obtain the pressure value of the electrode assembly on the upper surface and / or the lower surface of the jaw body, so as to master the adhesion of the electrode assembly on the upper surface and / or the lower surface of the jaw body.

[0027] In a possible implementation, the discharging device further comprises a height regulating component, which is configured to regulate the height of the first jaw.

[0028] In a possible implementation, the height regulating component is electrically connected with the pressure sensor, and the height regulating component adjusts the height of the first jaw according to the pressure value obtained by the pressure sensor.

[0029] Due to gravity and electrostatic action, the inner layer of the electrode assembly may collapse. The collapsed inner layer will adhere to the outer surface of the jaw body and generate a certain pressure on the outer surface of the jaw body. When the collapse of the inner layer of the electrode assembly is more serious, the pressure generated on the outer surface of the jaw body is also larger. In this case, the gas discharged from the gas outlet cannot support the electrode assembly away from the first jaw. If the flow rate of the gas is excessively increased, the gap between the negative plate, the positive plate and the separator of the electrode assembly will be affected, and the quality of the electrode assembly will be affected. Therefore, when the pressure value of the electrode assembly on the outer periphery of the jaw body is too large, the height of the first jaw is adjusted to avoid the collapsed inner layer of the electrode assembly in the height direction, so that the inner layer of the electrode assembly does not adhere to the outer surface of the jaw body. At the same time, the electrode assembly can be ventilated, which facilitates the first jaw to be separated from the electrode assembly and reduces damage to the electrode assembly.

[0030] In a possible implementation, the discharging device further comprises a telescopic regulating component, which is configured to regulate the length of the first jaw extending into the electrode assembly.

[0031] The length of the first jaw extending into the electrode assembly is adjusted by the telescopic regulating component, so as to facilitate the first jaw to be separated from the electrode assembly.

[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 configured to wind a positive plate and a negative plate to form an electrode assembly; the discharging device in the first aspect or any possible implementation of the first aspect, the discharging device being configured to discharge the electrode assembly wound on the winding needle. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the drawings without creative labor.

[0034] Figure 1 is a decomposition structure schematic diagram of a battery disclosed by an embodiment of the present application;

[0035] Figure 2 is a decomposition structure schematic diagram of a battery monomer disclosed by an embodiment of the present application;

[0036] Figure 3 is a cross-sectional view of an electrode assembly disclosed by an embodiment of the present application;

[0037] Figure 4 is a structure schematic diagram of a winding needle device disclosed by an embodiment of the present application;

[0038] Figure 5 is a structure schematic diagram of a blanking device disclosed by an embodiment of the present application;

[0039] Figure 6 is a structure schematic diagram of a clamping jaw body disclosed by an embodiment of the present application;

[0040] Figure 7 is a cross-sectional view of a clamping jaw body disclosed by an embodiment of the present application;

[0041] Figure 8 is a schematic flow chart of a blanking method disclosed by an embodiment of the present application;

[0042] Figure 9 is a schematic flow chart of a blanking method disclosed by an embodiment of the present application.

[0043] In the drawings, the drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be further described in detail below in combination with the drawings and embodiments. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0045] In the description of the application, it is necessary to point out that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0046] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. In the description of the application, it is also necessary to point out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] The term "and / or" in the application is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0048] Unless otherwise defined, all technical and scientific terms used in the application have the same meaning as understood by a person skilled in the art to which the application belongs; the terms used in the specification of the application are only for the purpose of describing the specific embodiments, and are not intended to limit the application; the terms "include" and "have" in the specification and claims of the application and the above description of the drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims or the above description of the drawings are used to distinguish different objects, and are not used to describe a specific order or primary and secondary relationship.

[0049] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment independent of or to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the application can be combined with other embodiments.

[0050] In the embodiments of the present application, the battery cell can 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. The embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: a cylindrical battery cell, a square battery cell, and a soft package battery cell, etc. The embodiments of the present application are not limited thereto.

[0051] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. The battery generally includes a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0052] The battery cell can include an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly works by moving metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer, and the current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the negative electrode active material layer protrudes from the current collector with the negative electrode active material layer, and the current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be graphite, carbon, or silicon, etc. In order to ensure that the fuse does not occur when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly can be a winding type structure or a stacking type structure, and the embodiments of the present application are not limited thereto.

[0053] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station, etc., but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0054] The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters. The quality of the electrode assembly is an important factor affecting the performance of the battery.

[0055] In the manufacturing process of the electrode assembly, the rolling, cutting, and transferring of the electrode assembly can affect the quality of the electrode assembly. For example, after the electrode assembly is cut, the electrode assembly needs to be transferred from the cutting device to the conveying device. The friction between the clamping jaw of the cutting device and the inner layer of the electrode assembly can affect the separation of the clamping jaw. The inner layer of the electrode assembly can be collapsed and adsorbed on the clamping jaw or electrostatically adsorbed on the clamping jaw, which causes a large friction between the inner layer of the electrode assembly and the clamping jaw when the clamping jaw separates from the electrode assembly, resulting in poor needle extraction and affecting the quality of the electrode assembly.

[0056] In view of this, the present application provides a cutting device for cutting the electrode assembly wound on the winding needle. The cutting device includes a first clamping jaw and a second clamping jaw. At least part of the first clamping jaw is inserted into the electrode assembly and opposite to the inner side of the electrode assembly. The second clamping jaw is opposite to the outer side of the electrode assembly. The first clamping jaw and the second clamping jaw cooperate to clamp the electrode assembly and remove the electrode assembly from the winding needle. Specifically, the first clamping jaw is provided with an air outlet. After the first clamping jaw removes the electrode assembly from the winding needle, the two first clamping jaws move away from the electrode assembly to place the electrode assembly on the conveying device. Before and during the movement of the first clamping jaw, the air outlet on the first clamping jaw is ventilated to the electrode assembly, so that the electrode assembly is raised away from the first clamping jaw. In this way, the inner layer of the electrode assembly is not adsorbed on the outer periphery of the first clamping jaw. When the first clamping jaw moves, the friction between the first clamping jaw and the inner layer of the electrode assembly is small, and the first clamping jaw can be easily extracted, reducing the possibility of electrode assembly damage caused by poor needle extraction of the cutting device, and improving the quality of the electrode assembly.

[0057] To meet different power requirements, the battery 10 can include a plurality of battery cells. For example, Figure 1 A schematic diagram of the exploded structure of a battery 10 according to an embodiment of the present application. The battery 10 can include a plurality of battery cells 20. According to different power requirements, the number of battery cells 20 can be set to any value. The plurality of battery cells 20 can be connected in series, parallel, or mixed connection to achieve larger capacity or power. Since the number of battery cells 20 included in each battery 10 can be large, in order to facilitate installation, the battery cells 20 can be grouped and arranged, and each group of battery cells 20 forms a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to requirements. The battery can include a plurality of battery modules, and these battery modules can be connected in series, parallel, or mixed connection.

[0058] Optionally, the battery 10 can further include other structures. For example, the battery 10 can further include a current collecting member for realizing electrical connection between the plurality of battery cells 20, such as in parallel, in series, or in a mixed connection. Specifically, the current collecting member can realize electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the current collecting member can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the plurality of battery cells 20 can be further led out through the box by a conductive mechanism. Optionally, the conductive mechanism can also belong to the current collecting member.

[0059] The battery 10 can further include a box 11 (or cover) with a hollow structure inside, and the plurality of battery cells 20 are accommodated in the box 11. As shown in Figure 1 The box 11 can include two parts, here referred to as an upper box 111 and a lower box 112, which are buckled together. The shapes of the upper box 111 and the lower box 112 can be determined according to the shape of the combination of the plurality of battery cells 20, and at least one of the upper box 111 and the lower box 112 has an opening. For example, the box 11 can include only one of the upper box 111 and the lower box 112 as a hollow cuboid with an opening, and the other as a plate to cover the opening. For example, as shown in Figure 1 The lower box 112 is a hollow cuboid with only one face as an opening face, and the upper box 111 is a plate, and the upper box 111 covers the opening of the lower box 112 to form a box 11 with a closed cavity, which can be used to accommodate the plurality of battery cells 20.

[0060] As shown in Figure 2The diagram shown is a structural schematic of a battery cell 20 according to an embodiment of this application. The battery cell 20 includes one or more electrode assemblies 22, a housing 21, and an end cap 24. The housing 21 and the end cap 24 form a casing or battery box. The walls of the housing 21 and the end cap 24 are both referred to as the walls of the battery cell 20. For a cuboid battery cell 20, the walls of the housing 21 include a bottom wall and four side walls, which are connected to form a receiving space 23 for placing the electrode assemblies 22. The shape of the housing 21 depends on the shape of the combined one or more electrode assemblies 22. For example, the housing 21 can be a hollow cuboid, cube, or cylinder, and one side of the housing 21 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 21. For example, when the housing 21 is a hollow cuboid or cube, one plane of the housing 21 is an open surface, that is, this plane does not have a wall, allowing communication between the inside and outside of the housing 21. When the housing 21 can be a hollow cylinder, the end face of the housing 21 is an open face, that is, the end face does not have a wall, allowing the inside and outside of the housing 21 to communicate. The end cap 24 covers the opening of the receiving space 23 and is connected to the housing 21 to form a closed cavity for placing the electrode assembly 22. The housing 21 is filled with an electrolyte, such as an electrolyte solution.

[0061] The battery cell 20 may also include two electrode terminals 241, which may be disposed on the end cap 24. The end cap 24 is typically flat, and the two electrode terminals 241 are fixed to the flat surface of the end cap 24. The two electrode terminals 241 are respectively a positive electrode terminal 241a and a negative electrode terminal 241b. Each electrode terminal 241 is provided with a corresponding connecting member 25, or a current collector, which is located between the end cap 24 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 241.

[0062] like Figure 2 As shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive tab, the second tab 222a is a negative tab. The first tab 221a of one or more electrode assemblies 22 is connected to an electrode terminal via a connecting member 25, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 25. For example, the positive electrode terminal 241a is connected to the positive tab via a connecting member 25, and the negative electrode terminal 241b is connected to the negative tab via another connecting member 25.

[0063] In this battery cell 20, depending on actual usage requirements, the electrode assembly 22 can be configured as a single unit or multiple units, such as... Figure 3 As shown, the battery cell 20 contains four independent electrode assemblies 22.

[0064] As shown in Figure 3 , the electrode assembly 22 includes a negative electrode sheet 221, a positive electrode sheet 222, and a separator 223 disposed between the positive electrode sheet 222 and the negative electrode sheet 221. The negative electrode sheet 221, the positive electrode sheet 222, and the separator 223 can be wound in a certain direction by a winding needle to form a wound electrode assembly 22. The electrode assembly 22 is then removed from the winding needle by a stripping device and transferred to an electrode assembly transport device, such as a conveyor belt or the like.

[0065] Figure 4 is a structural schematic diagram of a winding needle device according to an embodiment of the present application. As shown in Figure 4 (a) of the drawing, the winding needle device includes a winding needle 40. Specifically, as shown in Figure 4 (b) of the drawing, the winding needle 40 includes a first inner needle 411 and a second inner needle 412, which can be used to clamp the electrode assembly 22; the winding needle 40 can also include a first outer needle 421 and a second outer needle 422 disposed opposite each other, the outer periphery of the first outer needle 421 and the second outer needle 422 can be used to wind the electrode assembly 22.

[0066] The first inner needle 411 and the second inner needle 412 can constitute an inner needle assembly of the winding needle 40, and the first outer needle 421 and the second outer needle 422 can constitute an outer needle assembly of the winding needle 40. The outer needle assembly can have a receiving space for receiving the inner needle assembly, so that the inner needle assembly can be disposed inside the outer needle assembly. The inner needle assembly can be used to clamp the electrode assembly 22, and the outer periphery of the outer needle assembly can be used to carry and wind the electrode assembly 22. During winding, part of the electrode assembly 22 can be located inside the outer needle assembly and clamped by the inner needle assembly, and the other part of the electrode assembly 22 can extend from the inside of the outer needle assembly and be wound on the outer periphery of the outer needle assembly.

[0067] The specific structure of the stripping device according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0068] Referring to Figure 5 , Figure 5 is a structural schematic diagram of a stripping device according to an embodiment of the present application. The stripping device is used to strip the electrode assembly 22 wound on the winding needle 40, and includes a first clamping jaw 31 and a second clamping jaw 32. At least part of the first clamping jaw 31 is inserted into the electrode assembly 22 and opposes the inner side of the electrode assembly 22, and the second clamping jaw 32 opposes the outer side of the electrode assembly 22. The second clamping jaw 32 cooperates with the first clamping jaw 31 to clamp the electrode assembly 22 and remove the electrode assembly 22 from the winding needle 40.

[0069] The first clamping jaw 31 can be inserted into the electrode assembly 22 to provide a supporting force to the electrode assembly 22 from the inner side of the electrode assembly 22. The second clamping jaw 32 is opposite to the first clamping jaw 31 on the outer side of the electrode assembly 22 to clamp the electrode assembly 22. The first clamping jaw 31 and the second clamping jaw 32 together support and fix the electrode assembly 22. The first clamping jaw 31 and the second clamping jaw 32 can be square long strips extending along the y direction, or can be cylindrical long strips, i.e., the outer periphery of the first clamping jaw 31 and the second clamping jaw 32 can be square, or can be circular, or can be other regular or irregular shapes, which are not limited in the present application. The first clamping jaw 31 and the second clamping jaw 32 can be the same shape, or can be different shapes. The first clamping jaw 31 and the second clamping jaw 32 can be made of the same material, or can be made of different materials, such as steel, aluminum, alloy, and composite material, which are not limited in the present application.

[0070] Specifically, as shown in FIG. 1, Figure 6 the first clamping jaw 31 is provided with an air outlet 311 for blowing air to the electrode assembly 22 to make the electrode assembly 22 stand up away from the first clamping jaw 31 to separate the first clamping jaw 31 from the electrode assembly 22.

[0071] In the process of taking the electrode assembly 22 off the winding needle 40, at least a part of the first clamping jaw 31 is inserted into the hollow area of the electrode assembly 22 and opposite to the inner side of the electrode assembly, the second clamping jaw 32 is opposite to the outer side of the electrode assembly 22, and the first clamping jaw 31 and the second clamping jaw 32 clamp the electrode assembly 22 together. When the winding needle 40 is retracted from the hollow area of the electrode assembly 22, the first clamping jaw 31 and the second clamping jaw 32 support and fix the electrode assembly 22. After the electrode assembly 22 is taken off the winding needle 40, the first clamping jaw 31 moves away from the electrode assembly 22, for example, Figure 5 the y direction (the direction indicated by the arrow) in FIG. 1, and is separated from the hollow area of the electrode assembly 22 to place the electrode assembly 22 on the conveying device. In the process of moving the first clamping jaw 31 away from the electrode assembly 22, the air outlet 311 blows air to the electrode assembly 22, so that an air layer is formed between the first clamping jaw 31 and the electrode assembly 22, and the electrode assembly 22 stands up away from the first clamping jaw 31, for example, Figure 5 the x direction and the z direction in FIG. 1. In this way, when the first clamping jaw 31 is separated from the hollow area of the electrode assembly 22, the friction between the first clamping jaw 31 and the inner layer of the electrode assembly 22 is small, and the first clamping jaw 31 can be smoothly separated, reducing the possibility of the electrode assembly 22 being damaged by the needle pulling device, and improving the quality of the electrode assembly 22.

[0072] It should be understood that, Figure 6 the air outlet 311 shown in FIG. 1 is only an exemplary description of one embodiment of the present application, and does not constitute a limitation on the present application. Figure 6The gas outlet 311 in the first clamping jaw 31 is a circular hole-shaped gas outlet with a gap. The gas outlet 311 can also be a plurality of circular hole-shaped gas outlets in communication with each other, or a square gas outlet. The gas outlet 311 can also be a rectangular opening. The present application does not limit the gas outlet.

[0073] Optionally, in the embodiment of the present application, the blanking device comprises two first clamping jaws 31, and the two first clamping jaws 31 are relatively movable.

[0074] Here, the two first clamping jaws 31 being relatively movable means that the two first clamping jaws 31 can move towards or away from each other in the horizontal direction, for example, as shown in Figure 5 , the two first clamping jaws 31 move towards each other in the x direction, or move away from each other.

[0075] It should be understood that the two first clamping jaws 31 are only an exemplary description of the embodiment of the present application, and do not constitute a limitation of the present application. The blanking device can comprise a plurality of first clamping jaws 31, such as three first clamping jaws 31 or four first clamping jaws 31, to improve the supporting effect of the first clamping jaw 31 on the electrode assembly 22. When the blanking device comprises a plurality of first clamping jaws 31, the first clamping jaws 31 close to both ends of the electrode assembly 22 in the horizontal direction can be relatively movable, and the other first clamping jaws 31 can be fixed in position.

[0076] The two first clamping jaws 31 can be relatively movable, so that the shape of the electrode assembly 22 can be changed by changing the relative position of the two first clamping jaws 31.

[0077] Optionally, in the embodiment of the present application, as shown in Figure 6 , the first clamping jaw 31 comprises a clamping jaw body 31a and a base 31b connected to the clamping jaw body 31a, the clamping jaw body 31a is used for inserting into the hollow region of the electrode assembly 22, and the gas outlet 311 is arranged on the outer periphery of the clamping jaw body 31a.

[0078] The hollow region of the electrode assembly 22 referred to herein means the hollow region of the winding center surrounded by the electrode assembly 22 when the winding needle 40 winds to form the electrode assembly 22, for example, Figure 5 , the A region.

[0079] Specifically, as shown in Figure 7 , the gas outlet 311 can be arranged on the upper surface 313, the lower surface 314 and the side surface 315 close to one end of the electrode assembly 22 in the x direction of the clamping jaw body 31a. It should be understood that the opposite side surfaces of the two first clamping jaws 31 can not be provided with the gas outlet 311, for example, Figure 6 , the opposite side surfaces 316 of the two first clamping jaws 31 shown in

[0080] The clamping jaw body 31a of the first clamping jaw 31 is inserted into the hollow region of the electrode assembly 22, and plays a role of supporting and fixing the electrode assembly 22 during the process of the winding needle 40 being pulled out of the hollow region of the electrode assembly 22, so that the winding needle 40 can be smoothly pulled out of the hollow region of the electrode assembly 22. The air outlet 311 is arranged on the outer periphery of the clamping jaw body 31a, can face the inner layer of the electrode assembly 22 for ventilation, and forms an air layer between the clamping jaw body 31a and the inner layer of the electrode assembly 22, so that the first clamping jaw 31 can be smoothly separated from the electrode assembly 22 and the possibility of damaging the electrode assembly 22 is reduced.

[0081] Optionally, the air outlet 311 can be arranged at the connection between the upper surface 313 and the side surface 315 of the clamping jaw body 31a and the connection between the lower surface 314 and the side surface 315.

[0082] Optionally, in the embodiment of the present application, as shown in Figure 6 the base 31b is provided with an air inlet 312, and the first clamping jaw 31 is internally provided with a blowing channel connected with the air inlet 312 and the air outlet 311.

[0083] Further, the air inlet 312 can be connected with an external gas conveying pipeline to convey the gas in the gas conveying pipeline into the blowing channel in the first clamping jaw 31. An adjusting valve can also be arranged on the gas conveying pipeline to adjust the flow rate of the gas conveyed into the first clamping jaw 31. That is, the flow rate of the gas can be adjusted according to the collapse of the inner layer of the electrode assembly 22 and the adsorption of the electrode assembly 22 to the outer periphery of the first clamping jaw 31, so as to ensure that the gas discharged from the air outlet 311 can support the electrode assembly 22 in the direction away from the first clamping jaw 31.

[0084] The air inlet 312 is arranged on the base 31b, which is convenient for conveying the gas into the air inlet 312. Meanwhile, the blowing channel is arranged in the first clamping jaw 31, so that the gas conveyed into the air inlet 312 can flow through the blowing channel to the air outlet 311. The blowing channel can guide the flow of the gas conveyed into the air inlet 312, so that the position of the air outlet 311 can be arranged according to actual operation needs without affecting the discharge of the gas from the air outlet 311.

[0085] Optionally, in the embodiment of the present application, as shown in Figure 7 the blowing channel includes a main channel 317a and a plurality of sub-channels 317b in communication with the main channel 317a. The main channel 317a is connected with the air inlet 312, and at least one sub-channel 317b is connected with the air outlet 311.

[0086] The main channel 317a is connected with the air inlet 312, and external air enters the main channel 317a through the air inlet 312, and then diffuses from the main channel 317a to the plurality of sub-channels 317b, and then reaches the air outlet 311 through the sub-channels 317b, and then ventilates to the electrode assembly 22 through the air outlet 311, so that the electrode assembly 22 is lifted away from the first clamp jaw 31, and the possibility of damaging the electrode assembly 22 is reduced.

[0087] Optionally, in the embodiment of the present application, the main channel 317a extends along a direction parallel to the extension direction of the clamp jaw body 31a.

[0088] For example, as shown in FIG. 7, the clamp jaw body 31a extends along the y direction, and the main channel 317a extends along a direction parallel to the y direction. Figure 6

[0089] The main channel 317a extends along a direction parallel to the extension direction of the clamp jaw body 31a, so that after the external air enters the main channel 317a through the air inlet 312, the external air can fill the entire main channel 317a along the extension direction of the clamp jaw body 31a, so that the gas in the main channel 317a can quickly diffuse to each sub-channel 317b.

[0090] Optionally, in the embodiment of the present application, the sub-channel 317b extends along a direction perpendicular to the extension direction of the clamp jaw body 31a, for example, the x direction and the z direction in FIG. 6 and FIG. 7. Figure 6 Figure 7

[0091] The air outlet 311 is arranged on the outer periphery of the clamp jaw body 31a, and the sub-channel 317b extends along a direction perpendicular to the extension direction of the clamp jaw body 31a, so as to be connected with the air outlet 311, thereby guiding the gas in the air blowing channel to the air outlet 311, and the flow direction of the gas discharged from the air outlet 311 is a straight line direction, so that the electrode assembly 22 can be lifted away from the first clamp jaw 31 along the straight line direction, rather than an inclined direction, and the shape of the electrode assembly 22 will not be damaged.

[0092] Optionally, in the embodiment of the present application, the cross-sectional area of the main channel 317a is larger than the cross-sectional area of the sub-channel 317b.

[0093] The cross-sectional area of the main channel 317a is large, so that a sufficient amount of gas can be introduced into the clamp jaw body 31a, and the gas discharged from the air outlet 311 can meet the needs of lifting the electrode assembly 22 away from the first clamp jaw 31, and the cross-sectional area of the plurality of sub-channels 317b is small, thereby reducing the space occupied by the air blowing channel in the clamp jaw body 31a, increasing the solid area of the clamp jaw body 31a, and improving the structural strength and rigidity of the clamp jaw body 31a, thereby stably supporting the electrode assembly 22. ​​​

[0094] Optionally, in the embodiments of the present application, as shown in Figure 6 The outer periphery of the clamping jaw body 31a is provided with a pressure sensor 318, which is used to obtain the pressure value of the electrode assembly 22 on the outer periphery of the clamping jaw body 31a.

[0095] The pressure value of the electrode assembly 22 on the outer periphery of the clamping jaw body 31a is obtained by the pressure sensor 318 to master the fit of the electrode assembly 22 on the outer periphery of the clamping jaw body 31a.

[0096] Specifically, the pressure sensor 318 can be arranged on the upper surface 313 and / or the lower surface 314 of the clamping jaw body. When the pressure sensor 318 and the air outlet 311 are arranged on the same outer surface of the clamping jaw body 31a, the pressure sensor 318 and the air outlet 311 are staggered to avoid each other. When the clamping jaw body 31a is inserted into the hollow area of the electrode assembly 22 to support the electrode assembly 22, the electrode assembly 22 will generate a larger pressure on the upper surface of the clamping jaw body 31a due to gravity; at the same time, due to the electrostatic effect, the electrode assembly 22 will be attached to the clamping jaw body 31a, generating pressure on the upper surface 313 and the lower surface 314 of the clamping jaw body 31a. The pressure sensor 318 is arranged on the upper surface 313 and / or the lower surface 314 of the clamping jaw body 31a to obtain the pressure value of the electrode assembly 22 on the upper surface 313 and / or the lower surface 314 of the clamping jaw body 31a, so as to master the fit of the electrode assembly 22 on the upper surface 313 and / or the lower surface 314 of the clamping jaw body 31a.

[0097] Optionally, the pressure sensor 318 can be a thin film pressure sensor. The thin film pressure sensor is prepared by modern thin film technology, which deposits a thin film strain resistance on a metal elastic substrate. Due to its high precision, good creep resistance and strong anti-interference ability, it has been widely used in pressure measurement in the fields of aerospace, mechanical manufacturing, civil mining and other related fields. The thickness of the thin film pressure sensor is as low as several hundred nanometers to several tens of microns, which can be directly filmed on the surface of the measured part without affecting the internal environment of the equipment, and is simple to manufacture, which is conducive to the realization of structure / sensing integrated manufacturing.

[0098] It should be understood that the above-described thin film pressure sensor is only an exemplary description of the pressure sensor 318 of the present application and does not constitute a limitation on the present application.

[0099] Optionally, the pressure value obtained by the pressure sensor 318 can be transmitted to the control module of the discharging device through wireless communication, such as 3G / 4G / 5G / ETH, etc.

[0100] Optionally, a signal shielding device can be arranged on the base 31b, for example, as shown in Figure 6The signal shielding line 319 shown allows the pressure sensor 318 to transmit pressure value data to the control module, while shielding pressure value data transmitted to the control module from components other than the pressure sensor 318. This prevents pressure value data from other components from affecting the accuracy of the pressure value of the electrode assembly 22 on the periphery of the gripper body 31a obtained by the pressure sensor 318.

[0101] Optionally, in this embodiment of the application, the unloading device includes a height adjustment component 33, which is used to adjust the height of the first gripper 31.

[0102] Specifically, such as Figure 5 As shown, the height adjustment component 33 may include a main adjustment component 33a and a micro-adjustment component 33b. The main adjustment component 33a has a larger adjustment range and lower adjustment accuracy, and is suitable for long-distance adjustment, such as a coarse adjustment screw. The micro-adjustment component 33b has a smaller adjustment range and higher adjustment accuracy, and is suitable for fine, short-distance adjustment, such as a fine adjustment screw.

[0103] Optionally, in this embodiment, the height adjustment component 33 is electrically connected to the pressure sensor 318, and the height adjustment component 33 adjusts the height of the first gripper 31 according to the pressure value obtained by the pressure sensor 318.

[0104] Specifically, when the pressure value of the electrode assembly 22 on the outer periphery of the gripper body 31a exceeds a preset threshold, the height adjustment component 33 adjusts the height of the first gripper 31, for example... Figure 5 The z-direction is the height direction of the first gripper 31.

[0105] Specifically, due to gravity and electrostatic forces, the inner layer of the electrode assembly 22 may collapse. This collapsed inner layer will adhere to the outer surface of the gripper body 31a, exerting pressure on it. When the collapse is severe, the pressure on the outer surface of the gripper body 31a is also greater. Furthermore, in this situation, the gas discharged from the outlet 311 cannot support the electrode assembly 22 away from the first gripper 31. Excessively increasing the gas flow rate will affect the gap between the negative electrode 221, the positive electrode 222, and the diaphragm 223 of the electrode assembly 22, thus affecting the quality of the electrode assembly 22. Therefore, when the pressure of the electrode assembly 22 on the outer periphery of the gripper body 31a is too high, the height of the first gripper 31 is adjusted to avoid the collapsed inner layer of the electrode assembly 22 in the height direction, preventing it from adhering to the outer surface of the gripper body 31a. It can also simultaneously ventilate the electrode assembly 22 to further reduce the adsorption between the electrode assembly 22 and the outer periphery of the gripper body 31a, making it easier for the first gripper 31 to be extracted from the electrode assembly 22 and reducing damage to the electrode assembly 22.

[0106] Optionally, in the embodiment of the present application, as shown in Figure 5 the blanking device comprises two second clamping jaws 32, which cooperate with the first clamping jaws 31 to clamp the electrode assembly 22, so as to take the electrode assembly 22 off the winding needle 40.

[0107] During the process of taking the electrode assembly 22 off the winding needle 40, after at least part of the two first clamping jaws 31 is inserted into the hollow area of the electrode assembly 22, the winding needle 40 is retracted, and the two first clamping jaws 31 move away from each other along the x direction, so that the left and right ends of the electrode assembly 22 gradually move away from each other to the position where the two second clamping jaws 32 can cooperate with the two first clamping jaws 31 to clamp the left and right ends of the electrode assembly 22, respectively. On the one hand, the cooperation of a clamping jaw 31 and a second clamping jaw 32 to clamp the electrode assembly 22 can play a better supporting and fixing role; on the other hand, while the winding needle 40 is retracted and extracted from the hollow area of the electrode assembly 22, the first clamping jaw 31 and the second clamping jaw 32 cooperate to clamp the electrode assembly 22 and move the electrode assembly 22 in the direction away from the winding needle 40.

[0108] The cooperation of the second clamping jaw 32 and the first clamping jaw 31 to clamp the electrode assembly 22 can play a better supporting and fixing role on the one hand, and can pull the electrode assembly 22 to move in the direction away from the winding needle 40 on the other hand, which is convenient for taking the electrode assembly 22 off the winding needle 40.

[0109] Optionally, in the embodiment of the present application, the blanking device comprises a horizontal control component 34, which is used to control the horizontal position of the first clamping jaw 31, so that the two first clamping jaws 31 can move relative to each other.

[0110] Specifically, referring to Figure 5 , the horizontal control component 34 can comprise a left control component 34a and a right control component 34b. The left control component 34a corresponds to the left first clamping jaw 31 and adjusts the horizontal position of the left first clamping jaw 31, and the right control component 34b corresponds to the right first clamping jaw 31 and adjusts the horizontal position of the right first clamping jaw 31, so that the two first clamping jaws 31 can be controlled respectively according to the actual situation.

[0111] By controlling the horizontal position of the first clamping jaw 31 through the horizontal control component 34, the two first clamping jaws 31 can move relative to each other. During the process of taking the electrode assembly 22 off the winding needle 40 by the first clamping jaw 31, the two first clamping jaws 31 can be adjusted to move away from each other to preliminarily shape the electrode assembly 22, and at the same time, during the process of transferring the electrode assembly 22 from the blanking device to the conveying device, the two first clamping jaws 31 can move close to each other, that is, move from the left and right ends of the electrode assembly 22 to the middle, so that the first clamping jaw 31 can be separated from the electrode assembly 22.

[0112] Optionally, in the embodiment of the present application, the blanking device further comprises a telescopic control component 37, which is used to control the length of the first clamping jaw 31 extending into the electrode assembly 22.

[0113] Specifically, when the electrode assembly 22 is transferred to the electrode assembly conveying device, the first clamping jaw 31 can be adjusted to move in the direction away from the electrode assembly 22, and be separated from the electrode assembly 22.

[0114] Optionally, in the embodiment of the present application, as shown in Figure 5 , the blanking device comprises a first fixed support 35, and the first clamping jaw 31, the second clamping jaw 32, the height control component 33, the horizontal control component 34 and the telescopic control component 37 are connected with the first fixed support 35, such as welded connection, rivet connection, etc.

[0115] Specifically, the first fixed support 35 can extend along the x direction, and is connected with the first clamping jaw 31, the second clamping jaw 32, the height control component 33, the horizontal control component 34 and the telescopic control component 37, so as to fix the first clamping jaw 31, the second clamping jaw 32, the height control component 33, the horizontal control component 34 and the telescopic control component 37.

[0116] Optionally, in the embodiment of the present application, continuing to refer to Figure 5 , the blanking device comprises a second fixed support 36, and the second fixed support 36 is connected with the first fixed support 35, such as welded connection, rivet connection, etc.

[0117] Specifically, the second fixed support 36 can extend along the z direction, and the second fixed support 36 and the first fixed support 35 can form a cross-shaped fixed structure, which is convenient for fixing the blanking device.

[0118] The embodiment of the present application also provides a winding system, which comprises a winding needle device and the blanking device in any of the above embodiments. The winding needle device comprises a winding needle, which is used to wind the positive plate and the negative plate to form an electrode assembly, and the blanking device is used to blank the electrode assembly wound on the winding needle.

[0119] The blanking device of the embodiment of the present application is described in detail above, and the blanking method of the embodiment of the present application will be described in detail below. Figure 8 The technical features described in the device embodiment are applicable to the following method embodiment.

[0120] Figure 8 A schematic block diagram of a blanking method 800 of the blanking device of the embodiment of the present application is shown, and the blanking device is any of the above blanking devices. The blanking method 800 can be executed by a control module in the blanking device, and the blanking method 800 comprises the following steps.

[0121] 801, at least part of the first jaw is inserted into the electrode assembly, opposite the inner side of the electrode assembly;

[0122] 802, the second jaw is opposite the outer side of the electrode assembly;

[0123] 803, the second jaw cooperates with the first jaw to clamp the electrode assembly, so as to take the electrode assembly off the winding needle;

[0124] 804, air is blown to the electrode assembly through the air outlet;

[0125] 805, the first jaw is taken out of the electrode assembly.

[0126] After the first jaw and the second jaw cooperate to take the electrode assembly off the winding needle, the first jaw moves away from the electrode assembly to place the electrode assembly on the conveying device. Before and during the movement of the first jaw, the air outlet on the first jaw ventilates the electrode assembly, so that the electrode assembly is puffed away from the first jaw. In this way, the inner layer of the electrode assembly will not be adsorbed to the outer periphery of the first jaw, and the friction between the first jaw and the inner layer of the electrode assembly is small when the first jaw moves, so that the electrode assembly can be smoothly pulled out, reducing the possibility of damage to the electrode assembly by the winding device pulling out the needle, and improving the quality of the electrode assembly.

[0127] Figure 9 is a schematic flow chart of the discharging method 900 disclosed in another embodiment of the present application. Figure 9 901-903 in the above embodiment are similar to 801-803 in the above embodiment, and can refer to the above embodiment. For the sake of brevity, they will not be described here.

[0128] 904, the pressure value of the electrode assembly on the outer periphery of the first jaw is obtained;

[0129] 905, it is judged whether the pressure value of the electrode assembly on the outer periphery of the first jaw is greater than a preset threshold value;

[0130] 906, in the case where the pressure value of the electrode assembly on the outer periphery of the first jaw is greater than the preset threshold value, the height of the first jaw is adjusted to avoid the electrode assembly in the height direction.

[0131] The inner layer of the electrode assembly can collapse due to gravity and electrostatic effect, and the collapsed inner layer can adhere to the outer surface of the jaw body and generate a certain pressure on the outer surface of the jaw body. When the collapse of the inner layer of the electrode assembly is more serious, the pressure generated on the outer surface of the jaw body is also greater. In this case, the gas discharged from the gas outlet cannot support the electrode assembly away from the first jaw. If the flow rate of the gas is excessively increased, the gap between the negative plate, the positive plate and the separator of the electrode assembly will be affected, and the quality of the electrode assembly will be affected. Therefore, when the pressure value of the electrode assembly on the outer periphery of the first jaw is too large, the height of the first jaw is adjusted to avoid the collapsed inner layer of the electrode assembly in the height direction, so that the inner layer of the electrode assembly does not adhere to the outer surface of the jaw body. The electrode assembly can also be ventilated at the same time, which facilitates the separation of the first jaw from the electrode assembly and reduces the damage to the electrode assembly.

[0132] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A debunching apparatus for debunching electrode assemblies (22) wound on a mandrel, wherein, The first clamp jaw (31) is at least partially inserted into the electrode assembly (22) and is opposite to the inner side of the electrode assembly (22), and the first clamp jaw (31) is provided with an air outlet (311) for blowing air to the electrode assembly (22). The second clamp jaw (32) is configured to cooperate with the first clamp jaw (31) to clamp the electrode assembly (22) to remove the electrode assembly (22) from the winding needle. The blanking device comprises two first clamp jaws (31) which are movable relative to each other.

2. The blanking apparatus according to claim 1, wherein The first clamp jaw (31) comprises a clamp jaw body (31a) for insertion into the hollow area of the electrode assembly (22) and a base (31b) connected to the clamp jaw body (31a), and the air outlet (311) is arranged on the outer periphery of the clamp jaw body (31a).

3. The blanking apparatus according to claim 1, wherein The air outlet (311) is arranged on the upper surface and the lower surface of the clamp jaw body (31a).

4. The blanking apparatus according to claim 3, wherein The base (31b) is provided with an air inlet (312), and the interior of the first clamp jaw (31) is provided with an air blowing channel connecting the air inlet (312) and the air outlet (311).

5. The blanking apparatus according to claim 3, wherein The air blowing channel comprises a main channel (317a) connected to the air inlet (312) and a plurality of sub-channels (317b) in communication with the main channel (317a), and at least one of the sub-channels (317b) is connected to the air outlet (311).

6. The blanking apparatus according to claim 5, wherein The main channel (317a) extends in a direction parallel to the extension direction of the clamp jaw body (31a).

7. The blanking apparatus according to claim 6, wherein The sub-channels (317b) extend in a direction perpendicular to the extension direction of the clamp jaw body (31a).

8. The blanking apparatus according to claim 6, wherein The cross-sectional area of the main channel (317a) is greater than that of the sub-channels (317b).

9. The blanking apparatus according to claim 6, wherein The outer periphery of the clamp jaw body (31a) is provided with a pressure sensor (318) for acquiring the pressure value of the electrode assembly (22) on the outer periphery of the clamp jaw body (31a).

10. The blanking apparatus of claim 3, wherein, The pressure sensor (318) is arranged on the upper surface and / or the lower surface of the clamp jaw body (31a).

11. The blanking apparatus of claim 10, wherein, The blanking device further comprises a height regulating component (33) for regulating the height of the first clamp jaw (31).

12. The blanking apparatus of claim 10, wherein, The height regulating component (33) is electrically connected to the pressure sensor (318), and the height regulating component (33) adjusts the height of the first clamp jaw (31) according to the pressure value acquired by the pressure sensor (318).

13. The blanking apparatus of claim 12, wherein, The blanking device further comprises a telescopic regulating component (37) for regulating the length of the first clamp jaw (31) extending into the electrode assembly (22).

14. The blanking apparatus according to any one of claims 1 to 13, wherein The winding needle device comprises a winding needle for winding positive and negative electrode sheets to form an electrode assembly.

15. A winding system, characterized by ​ ​ The material dispensing apparatus according to any one of claims 1 to 14, for dispensing the electrode assembly wound on the winding needle.

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