Battery material winding method, device and equipment, medium and product

Abstract

The invention discloses a winding method, device and equipment of a battery material, a medium and a product, and relates to the field of battery preparation. The method comprises the following steps: acquiring a winding needle radius of a winding needle for winding a battery material; the thickness of the waste material is obtained, and a preset winding constraint radius adopted when the waste material is wound through a winding needle is obtained; determining the number of winding turns of the battery material to be discarded based on the winding needle radius, the discarded material thickness and the winding constraint radius; taking the number of winding turns as a winding reference, and winding the part meeting the preset discarding condition in the battery material in the process of preparing the winding core battery through the battery material. According to the method, the number of winding turns serving as constraint information in the winding process of the battery material can be quantitatively determined, the reasonable winding process can be conveniently executed on the battery material which meets the preset discarding condition and needs to be discarded according to the number of winding turns, and the winding utilization rate of the material is guaranteed. The method can be applied to the preparation scene of the roll-core battery and the like.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery preparation, and in particular to a winding method, device, equipment, medium and product of battery materials. Background Art

[0002] As an energy storage device, batteries play a vital role in modern life. Roll-type batteries are a battery structure that winds battery materials such as positive electrodes, negative electrodes, and battery separators into a cylindrical or similar shape. They are widely used in smart phones, power tools, laptops, and electric vehicles.

[0003] In the related art, battery materials are usually wound by a winding needle to obtain larger finished materials. Then, in order to avoid the presence of joint sections in the winding process of the battery separator, or the presence of defects in the positive and / or negative electrode sheets in the wound core battery, multiple finished materials can be scanned to screen out finished materials with joint sections or defects, thereby realizing the screening process of finished materials.

[0004] However, the above-mentioned winding process usually directly winds up a larger finished material, so that the screened core batteries with joint sections or defective problems are also larger. Therefore, a large amount of battery materials are discarded ineffectively, resulting in a large problem of material waste. Summary of the invention

[0005] The embodiments of the present application provide a battery material winding method, device, equipment, medium and product, which can quantitatively determine the number of winding turns as constraint information in the battery material winding process, so as to facilitate the reasonable winding process of the battery material that meets the preset discarding conditions and needs to be discarded by the number of winding turns in the process of winding the battery material to obtain the core battery, which helps to avoid excessive waste of normal battery materials that need to be jointly wound and ensure the utilization rate of the materials. The technical solution is as follows.

[0006] In one aspect, a method for winding a battery material is provided, the method comprising:

[0007] Obtaining a winding needle radius of a winding needle used for winding battery materials;

[0008] Obtaining the thickness of the waste material, and obtaining the preset winding constraint radius used when the waste material is wound by the winding needle, wherein the thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded;

[0009] Determining the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius;

[0010] Taking the number of winding turns as the winding basis, in the process of preparing a core-wound battery using the battery material, a portion of the battery material that meets the preset discarding conditions is wound.

[0011] In another aspect, a battery material winding device is provided, the device comprising:

[0012] An acquisition module, used for acquiring a winding needle radius of a winding needle used for winding battery materials;

[0013] The acquisition module is further used to acquire the thickness of the waste material and to acquire the preset winding constraint radius used when the waste material is wound by the winding needle, wherein the thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded;

[0014] A determination module, configured to determine the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius;

[0015] The winding module is used to wind the portion of the battery material that meets the preset discarding conditions during the process of preparing a core-wound battery using the battery material, taking the number of winding turns as the winding basis.

[0016] On the other hand, a computer device is provided, which includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement a battery material winding method as described in any of the above-mentioned embodiments of the present application.

[0017] On the other hand, a computer-readable storage medium is provided, wherein at least one instruction, at least one program, a code set or an instruction set is stored in the storage medium, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement a battery material winding method as described in any of the above-mentioned embodiments of the present application.

[0018] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the battery material winding method described in any of the above embodiments.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0020] For the battery materials to be discarded, the number of winding turns of the battery materials to be discarded is analyzed by the thickness of the discarded materials, the winding constraint radius used when the discarded materials are wound by the winding needle, and the radius of the winding needle, so that in the preparation process of the battery materials, the battery materials that need to be discarded and meet the preset discard conditions are wound based on the number of winding turns. The number of winding turns as constraint information in the winding process of the battery materials is quantitatively determined by the radius of the winding needle, the thickness of the discarded materials, and the winding constraint radius, so that in the process of winding the battery materials to obtain the core battery, a reasonable winding process is performed on the battery materials that meet the preset discard conditions and need to be discarded by the number of winding turns, which improves the pertinence of the winding of the discarded materials. When winding the discarded battery materials to obtain the finished waste materials that meet the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset discard conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be wound together, ensure the utilization rate of the materials, and provide more objective information for the preparation process of the core battery through the quantitative process, thereby improving production efficiency and production execution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a structural block diagram of a winding system provided by an exemplary embodiment of the present application;

[0023] Figure 2 is a flow chart of a method for winding a battery material provided by an exemplary embodiment of the present application;

[0024] Figure 3 is a flow chart of a method for winding a battery material provided by another exemplary embodiment of the present application;

[0025] Figure 4 is a flow chart of a method for winding a battery material provided by another exemplary embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a transport clamp provided by an exemplary embodiment of the present application;

[0027] Figure 6 is a schematic cross-sectional view of a sample product obtained based on an Archimedean curve provided by an exemplary embodiment of the present application;

[0028] Figure 7is a flow chart of a method for winding a battery material provided by another exemplary embodiment of the present application;

[0029] Figure 8 is a structural block diagram of a winding device for battery materials provided by an exemplary embodiment of the present application;

[0030] Fig. 9 It is a structural block diagram of a terminal provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0032] First, a brief introduction is given to the terms involved in the embodiments of the present application.

[0033] Cylindrical cells: Most cylindrical cells (such as 18650, 21700) are spiral wound cells, which are widely used in portable electronic devices and electric vehicles. The design of cylindrical cells usually includes a cylindrical metal shell, which contains key components such as positive electrode materials, negative electrode materials, diaphragms, and electrolytes. Cylindrical cells are widely used in various electronic products due to their standardized size and reliable performance, such as laptops, digital cameras, portable tools, and an increasing number of electric vehicles and large energy storage systems.

[0034] Positive electrode material: During the discharge process of the battery, the positive electrode material provides lithium ions (or other charge carriers), and the lithium ions move to the negative electrode material through the electrolyte. During the charging process, the lithium ions return from the negative electrode material to the positive electrode material. Positive electrode materials generally have a high redox potential, which means that they can easily release and accept electrons. Common positive electrode materials in lithium-ion batteries include lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), nickel cobalt aluminum oxide (NCA), etc.

[0035] Negative electrode materials: During the discharge process of the battery, the negative electrode material receives lithium ions from the positive electrode material and releases lithium ions back to the positive electrode material during the charging process. The negative electrode material needs to have a high lithium storage capacity and good conductivity. Negative electrode materials usually have a low redox potential, which allows them to easily embed and deintercalate lithium ions. Common negative electrode materials in lithium-ion batteries include graphite (such as artificial graphite, natural graphite), carbon-based materials, silicon-based materials, tin-based materials, lithium titanate (Li4Ti5O12), etc.

[0036] Battery separator: The battery separator is one of the key components of lithium-ion batteries. It is located between the positive and negative electrodes of the battery. Its main function is to prevent physical contact between the positive and negative electrodes, thereby avoiding short circuits, while allowing lithium ions to pass through and stably conduct lithium ions to complete the battery's charge and discharge cycle. Battery separators are usually a functional membrane material with a microporous structure, and the quality of its performance directly determines the overall performance of the battery. The materials of battery separators usually include polyolefins, such as polyethylene (PE) and polypropylene (PP), as well as microporous membranes prepared by dry or wet processes. In addition, there are composite separators that improve the thermal stability and safety of the separator by coating inorganic ceramic particles (such as alumina) on polyolefin-based membranes. New separator materials are also under continuous development, including fluoropolymers, cellulose, polyimide (PI), polyester (PET), etc.

[0037] In the related art, the battery material is usually wound by a winding needle to obtain a larger finished material. Then, in order to avoid the presence of a joint segment in the battery separator winding process, or the presence of a defective positive electrode sheet and / or negative electrode sheet in the wound core battery, multiple finished materials can be scanned to screen out finished materials with a joint segment or defective problems, thereby realizing the screening process of finished materials. However, the above winding process usually directly winds a larger finished material, so that the screened core batteries with a joint segment or defective problems are also larger, so a large amount of battery materials are discarded ineffectively, resulting in a large waste of materials.

[0038] In an embodiment of the present application, a winding method for battery materials is introduced, which can quantitatively determine the number of winding turns as constraint information in the winding process of the battery materials, so that in the process of winding the battery materials to obtain the battery cells, a reasonable winding process is performed on the battery materials that meet the preset discard conditions and need to be discarded through the number of winding turns, which helps to avoid excessive waste of normal battery materials that need to be jointly wound and ensure the utilization rate of the materials. The winding method for battery materials proposed in the embodiment of the present application can be applied to a variety of supporting battery preparation scenarios such as the preparation scenarios of battery cells, the component manufacturing scenarios of electric vehicles, and the construction scenarios of energy storage systems, which are not limited here.

[0039] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards in the relevant regions. For example, the winding needle radius, waste material thickness, winding constraint radius and other contents involved in this application are all obtained with full authorization.

[0040] Secondly, the winding system involved in the embodiment of the present application is described. The winding method of the battery material provided in the embodiment of the present application can be implemented by the terminal alone, or by the terminal and the server through data interaction (such as the server is responsible for processing the data sent by the terminal), and the embodiment of the present application is not limited to this. Optionally, the winding method of the battery material executed by the terminal alone is described as an example.

[0041] For illustration, please refer to Figure 1 , the terminal 110 in the winding system obtains the radius of the winding needle used to wind the battery material.

[0042] Schematically, the winding needle is a component used to wind a material to obtain a cylindrical shaped finished product, such as a core battery, a waste material finished product, etc. The winding needle radius is the radius of the winding needle, and the winding needle is usually a pre-set component. The winding needle radius is also usually information input into the terminal 110 when the winding needle is selected.

[0043] In addition, the terminal 110 in the winding system also obtains the thickness of the waste material and the preset winding constraint radius used when the waste material is wound by the winding needle.

[0044] In some embodiments, the terminal 110 can also detect whether there is battery material to be discarded, i.e., waste material, in the battery material during the process of winding the battery material; if so, the thickness of the waste material and the winding constraint radius when winding the waste material are obtained.

[0045] The thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded.

[0046] In schematic form, the waste material thickness is the thickness information detected and identified for the battery material to be discarded; the winding constraint radius is a pre-set winding constraint radius used when the battery material to be discarded needs to be wound for disposal. Optionally, the winding constraint radius is the minimum radius of the clamp used to clamp the finished material after the finished material is made, that is, the minimum radius for successfully clamping the finished material is used as the winding constraint radius, so that the finished material obtained by winding also has the minimum radius, etc.

[0047] In some embodiments, the terminal 110 determines the number of windings of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material, and the winding constraint radius.

[0048] In schematic form, after obtaining the winding needle radius, the thickness of the waste material and the winding constraint radius, the terminal analyzes the finished cross-section of the finished material obtained by winding, and determines the number of winding turns based on the comprehensive winding needle radius, the thickness of the waste material and the winding constraint radius. The number of winding turns is the number of turns required to wind the battery material to be discarded. For example, if the number of winding turns is 2, it means that two turns are required, etc.

[0049] In some embodiments, the terminal 110 uses the number of winding turns as a winding reference and winds a portion of the battery material that meets a preset discard condition during the process of preparing a wound core battery using the battery material.

[0050] Illustratively, in the process of preparing a rolled battery using battery materials, the number of winding turns obtained by analysis is used as a winding basis, so as to specifically wind the waste material portion of the battery material that meets the predicted waste conditions, so as to obtain a finished waste material product with a winding constraint radius.

[0051] Optionally, the terminal 110 controls the winding device 111 to execute the winding process of the battery material. When the battery material to be discarded needs to be wound, the terminal 110 sends a control instruction to the winding device 111. The control instruction includes the number of winding turns. The control instruction is used to instruct the winding device to execute the winding process on the waste material that meets the preset discarding conditions based on the number of winding turns, so as to obtain at least one finished waste material that needs to be discarded.

[0052] It is worth noting that the above-mentioned terminals include but are not limited to mobile terminals such as mobile phones, tablet computers, portable laptops, intelligent voice interaction devices, smart home appliances, etc., and can also be implemented as desktop computers, etc.; the above-mentioned servers can be independent physical servers, or they can be server clusters or distributed systems composed of multiple physical servers, or they can also be cloud servers.

[0053] In combination with the above-mentioned noun introduction and application scenarios, the winding method of the battery material provided in this application is described, and the application of this method to a server is used as an example for description. Figure 2 As shown, the method includes the following steps 210 to 240.

[0054] Step 210, obtaining a radius of a winding needle used for winding battery materials.

[0055] Schematically, the battery material is the material used to wind up a core battery, and the battery material includes a positive electrode sheet, a negative electrode sheet, a battery separator, etc.

[0056] In the process of winding battery materials, a winding needle is used. The winding needle is a component specially used for winding. It can assist in the winding process to ensure that the positive electrode material, negative electrode material, battery separator, etc. are accurately and efficiently wound into a tight battery cell.

[0057] A winding needle is usually a metal needle with a specific shape, which may be straight or curved. It is usually made of metal or high-strength material to ensure that it can withstand greater pressure and friction during the winding process. Therefore, the winding needle corresponds to the winding needle radius. The winding needle radius is the curvature radius of the winding needle, that is, the distance from the central axis of the winding needle to the battery winding surface. The winding needle radius usually affects the winding tightness of the battery material during the winding process, such as: under a smaller winding needle radius, the battery material has a larger curvature when winding, so the battery material will be subjected to greater stress, making the winding tighter; under a larger winding needle radius, the battery material has a smaller curvature when winding, so the battery material will be subjected to less stress, making the winding tighter, etc.

[0058] After the winding needle is selected to perform winding of the battery material, the radius of the winding needle is determined accordingly. For example, when winding a 18650 core battery (diameter 18mm, length 65mm), the radius of the winding needle used is usually between 3mm and 5mm, such as 3mm or 4.5mm, etc.; or, when winding a 21700 core battery (diameter 21mm, length 70mm), the radius of the winding needle used is usually between 5mm and 7mm, etc., which are not limited here.

[0059] In some embodiments, the winding needle is used as the winding center, and the battery material is wound around the winding needle by a winding device to achieve a winding process for preparing a core-wound battery.

[0060] Optionally, the winding process of the winding device is controlled by a control terminal, and the control terminal sends control instructions to the winding device so that the control device ensures smooth feeding of battery materials, appropriate tension control and winding speed, etc. based on the control instructions, thereby achieving high-quality manufacturing of the core battery.

[0061] Alternatively, the winding device itself has a control component, and the winding device itself achieves the purpose of precise control through the control component. In this case, the winding device itself can be regarded as a terminal, which is not limited here.

[0062] Step 220, obtaining the thickness of the waste material, and obtaining a preset winding constraint radius used when the waste material is wound by the winding needle.

[0063] The waste material thickness is used to characterize the thickness of the battery material to be discarded.

[0064] Schematically, in the process of winding the battery material to obtain the spiral battery, there may be some battery materials that need to be discarded. For example, there are some poorly made battery materials. In order to avoid the spiral battery being defective due to winding the poor battery material, it is necessary to treat the poor battery material as the battery material to be discarded.

[0065] Optionally, the winding condition of the battery material is detected by a winding device or an additional sensor device. Schematically, the winding device itself has a sensor component, and the winding device detects whether the battery material to be wound is qualified through the sensor component before winding a section of the battery material, that is, detects whether the battery material to be wound needs to be discarded. If it is detected that the battery material to be wound is unqualified (such as the battery material is poorly made), the battery material to be wound is determined to be a battery material to be discarded, so as to determine the thickness of the discarded material based on the battery material to be discarded.

[0066] The winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded.

[0067] Schematically, battery materials are wound to obtain finished materials, such as core batteries obtained by winding normal battery materials, and waste material finished products obtained by winding battery materials to be discarded. In the process of winding battery materials to obtain finished materials, it is necessary to preset a certain winding constraint size to avoid continuous winding of the battery materials and obtaining an overly large finished material.

[0068] Optionally, when the presence of battery materials to be discarded is detected, a winding constraint radius is obtained to specifically wind the battery materials to be discarded; or, the battery materials are continuously wound using the winding constraint radius, wherein when the battery materials to be discarded need to be wound, the battery materials to be discarded are also wound using the winding constraint radius; the finished material obtained by the winding equipment by winding the battery materials to be discarded is called a finished waste material product.

[0069] In some embodiments, the winding constraint radius is dimensional constraint information determined based on the jaw angle of the handling jaw that removes the finished material.

[0070] Schematically, after the winding equipment winds the battery material to obtain the finished material, the finished material is separated from the fixed winding needle by the carrying jaws, wherein the carrying jaws separate the finished material from the winding needle by clamping; the angle of the carrying jaws determines the size of the finished material that can be clamped by the carrying jaws (such as the radius of the finished material); wherein, when the angle of the carrying jaws increases, the part of the carrying jaws in contact with the finished material will expand outward, which means that the angle at which the carrying jaws need to clamp the finished material becomes larger, thereby increasing the distance between the finished material and the center of the carrying jaws, but at the same time, the relative position of the contact point changes, so that when the carrying jaws clamp the finished material, the minimum radius from the surface of the object to the center of the jaws of the carrying jaws decreases, that is, as the jaw angle increases, the distance between the contact point and the center of the jaws becomes shorter, resulting in a decrease in the minimum radius; therefore, the larger the jaw angle, the smaller the size of the finished material that can be clamped, and the smaller the jaw angle, the larger the size of the finished material that can be clamped.

[0071] Optionally, the radius of the finished material that can be gripped by the handling gripper is determined based on a preset gripper angle, and the radius of the finished material is used as the winding constraint radius. Schematically, the minimum radius of the finished material that can be gripped by the handling gripper is determined based on a preset maximum gripper angle, and the minimum radius is used as the winding constraint radius.

[0072] Schematically, under normal circumstances, the maximum angle of the carrying jaws is 120 degrees. If the maximum angle of the carrying jaws is adjusted to 135 degrees, the radius of the finished material that can be clamped by the carrying jaws at 135 degrees is the smallest (i.e., the minimum radius), and the minimum radius is used as the winding constraint radius, so that the finished material can be successfully transported by the carrying jaws while winding to obtain the minimum finished material.

[0073] In some embodiments, the thickness of the waste material is flexibly determined based on information about the battery material to be discarded. Usually, depending on the different battery materials to be discarded, the thickness of the waste material also has corresponding differences. For example, if the battery material to be discarded is battery material A, the thickness of the waste material is d1; if the battery material to be discarded is battery material B, the thickness of the waste material is d2, etc., which is not limited here.

[0074] In some embodiments, the winding constraint radius is pre-set information, such as pre-determining the minimum radius of the handling jaws used to handle finished material at the maximum angle, so that the minimum radius is used as the winding constraint radius to perform subsequent analysis processes through the winding constraint radius.

[0075] Step 230, determining the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius.

[0076] In schematic form, the radius of the winding needle used for winding battery materials, the thickness of the waste battery materials to be discarded (also referred to as waste materials), and the pre-set winding constraint radius that can successfully transport the finished materials are comprehensively considered to analyze the number of turns required when winding the waste materials through the winding needle radius under the winding constraint radius, that is, the number of winding turns is obtained.

[0077] In some embodiments, when the presence of battery materials to be discarded is detected for the first time, the battery materials to be discarded are wound on a winding needle based on a winding constraint radius, and the finished material after winding the battery materials to be discarded is used as a sample finished product.

[0078] Optionally, the sample finished product has a corresponding relationship with the battery material to be discarded, and also has a corresponding relationship with the waste material thickness of the battery material to be discarded. For example: the battery material to be discarded is detected for the first time as battery material A, and battery material A is wound on a winding needle based on the winding constraint radius, and the obtained material finished product a is used as the sample finished product, and the material finished product a has a corresponding relationship with battery material A, and also has a corresponding relationship with the waste material thickness d1 of battery material A.

[0079] In some embodiments, the relationship between the winding needle radius, the waste material thickness and the winding constraint radius is analyzed based on the finished product cross-section of the sample finished product to determine the number of winding turns of the battery material to be discarded.

[0080] Optionally, a cross section of the finished sample product is obtained by performing electronic computed tomography (CT) on the finished sample product; schematically, after winding the battery material, the cross section of the finished product presents an Archimedean curve distribution, so the relationship between the winding needle radius, the thickness of the waste material and the winding constraint radius can be analyzed from the perspective of the Archimedean curve to calculate the number of winding turns, which represents the number of turns of the battery material in the finished sample product. For example, if the number of winding turns is 5, it means that the finished sample product is obtained by winding the battery material 5 times with the winding needle.

[0081] Step 240, taking the number of winding turns as the winding basis, winding the portion of the battery material that meets the preset discarding conditions during the process of preparing a wound core battery using the battery material.

[0082] Illustratively, after the number of winding turns is calculated and determined, the number of winding turns is used as a winding basis for detecting the battery material to be discarded and performing a winding process. That is, when the battery material to be discarded is detected, the winding process of the number of winding turns is performed on the battery material to be discarded with the winding needle as the winding center.

[0083] Optionally, taking the number of winding turns as quantitative information determined based on the sample finished product as an example, after obtaining the sample finished product, if some battery materials that meet the preset discard conditions are detected in the process of preparing the core battery by using battery materials, it is necessary to discard the part of the battery materials by winding. During the winding and discarding process, if the part of the battery materials that meet the preset discard conditions are the same as the waste materials corresponding to the sample finished product, the targeted winding process can be performed on the part of the battery materials that meet the preset discard conditions according to the number of winding turns corresponding to the sample finished product.

[0084] Indicatively, the sample finished product is material finished product a, and the waste material corresponding to material finished product a is battery material A. If part of the battery material that meets the preset waste conditions during the winding process of the battery material is also battery material A, then the number of winding turns corresponding to material finished product a (such as 5) is used as the number of winding turns for the part of the battery material that meets the preset waste conditions, that is, the part of the battery material that meets the preset waste conditions is wound 5 times with the winding needle as the winding center to obtain the waste material finished product that needs to be discarded.

[0085] In some embodiments, during the process of preparing a rolled battery using battery materials, it is detected in real time whether the battery materials meet the preset discard conditions. If they do, the number of winding turns is used as the winding basis to wind the portion of the battery materials that meet the preset discard conditions. If they do not meet the conditions, the winding process of the battery materials can continue in a normal manner.

[0086] Among them, the preset discarding condition is a pre-set condition for discarding battery materials. Optionally, the preset discarding condition includes the existence of secondary electrode materials, such as the positive electrode and / or the negative electrode having problems such as poor preparation, which requires the secondary electrode materials to be discarded; or, the preset discarding condition includes the diaphragm roll switching condition, such as the battery diaphragm is provided by a diaphragm roll, if the current diaphragm roll is used up, it is necessary to switch to the next diaphragm roll, the next diaphragm roll and the current diaphragm roll need to be connected by a connecting tape, the connection is called a joint section, the joint section cannot play the role of normal isolation of the battery diaphragm due to the existence of the connecting tape, so it is necessary to discard the joint section with the connecting tape.

[0087] In some embodiments, during the process of winding battery materials to prepare roll core batteries, most of the battery materials do not meet the preset waste conditions, and there may be some battery materials that meet the preset waste conditions. The number of winding turns is used as a constraint to constrain the winding information of some battery materials that meet the preset waste conditions, so that while all the finished materials obtained by winding are clamped out by the carrying clamp, the finished waste materials that meet the number of winding turns and are as small as possible can be clamped out, and the qualified finished materials clamped out can be retained.

[0088] The above process quantitatively determines the number of winding turns, which helps to determine a smaller number of winding turns through the winding constraint radius, so that in the process of winding to obtain the core battery, the battery material that meets the preset waste conditions is partially wound and the targeted waste purpose is achieved; in addition, when the number of winding turns is used to ensure that the finished wound material can be clamped out by the handling clamp, not only may some battery materials that meet the preset waste conditions be wound, but also a small part of battery materials that do not meet the preset waste conditions may be wound based on the number of winding turns, and this part of battery materials is adjacent to some battery materials that meet the preset waste conditions; the determination based on the number of winding turns also helps to reduce the waste amount of a small part of battery materials that do not meet the preset waste conditions, thereby minimizing the waste of battery materials on a large production line for winding battery materials and improving the utilization rate of battery materials.

[0089] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0090] In summary, the number of winding turns as constraint information in the battery material winding process is quantitatively determined through the winding needle radius, the thickness of the waste material and the winding constraint radius, so that in the process of winding the battery material to obtain the core battery, a reasonable winding process can be performed on the battery material that meets the preset waste conditions and needs to be discarded through the number of winding turns, thereby improving the targeting of the winding waste materials. When winding the discarded battery material to obtain the finished waste material that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset waste conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be jointly wound, ensure the utilization rate of materials, and provide more objective information for the preparation process of the core battery through the quantification process, thereby improving production efficiency and production execution.

[0091] In an optional embodiment, the waste material thickness is implemented as the thickness of the tape indicating the thickness of the connecting tape during the diaphragm roll switching process, or the waste material thickness is implemented as the thickness of the secondary pole piece material when the secondary pole piece material exists. Figure 3 As shown above Figure 2 The illustrated step 220 may also be implemented as the following step 310 or step 320 .

[0092] Step 310 , obtaining a thickness of a connecting tape used to connect the first diaphragm roll and the second diaphragm roll as a waste material thickness.

[0093] Schematically, the battery materials used in the process of winding to prepare finished materials generally include positive electrode sheets, negative electrode sheets, battery separators, etc.; such as: the battery materials are wound in the manner of "positive electrode sheet - battery separator - negative electrode sheet - battery separator - positive electrode sheet..."; or, the battery materials are wound in the manner of "positive electrode sheet - battery separator - positive electrode sheet...", or, the battery materials are wound in the manner of "negative electrode sheet - battery separator - negative electrode sheet...", etc.

[0094] Among them, the battery separator, as a battery material that isolates the electrode material, has the function of ensuring the safety of finished product preparation and use; the battery separator can be provided by separator rolls, and the length of each separator roll is usually relatively long, such as 50 meters to 500 meters; in addition, the width of the separator roll, that is, the separator width, is approximately between 100 mm and 600 mm. The common battery separators have a separator width of 160 mm, 210 mm, 300 mm, etc., which is not limited here.

[0095] The first separator roll and the second separator roll are different separator rolls used to provide battery separators in battery materials.

[0096] Schematically, after the first diaphragm roll is used up, if the positive electrode material and / or the negative electrode material has not been completely wound, a second diaphragm roll needs to be connected after the first diaphragm roll to ensure the continuity of the diaphragm so that it can be smoothly fed into the production line for the next step of processing.

[0097] Among them, the first diaphragm roll and the second diaphragm roll are usually connected by connecting tape. The commonly used connecting tape is usually made of high-performance double-sided tape (Double-Sided Tape) or special tape, such as: double-sided tape made of polypropylene (PolyPropylene, PP) base film tape and coated with a specially designed adhesive on the surface; or, polyethylene terephthalate (PolyEthylene Terephthalate, PET) film tape; or, polyvinyl chloride (Polyvinyl Chloride) tape, etc., which are not limited here.

[0098] Illustratively, the first diaphragm roll and the second diaphragm roll are connected by a connecting tape of a certain length, and the thickness of the connecting tape is used as the thickness of the waste material.

[0099] Illustratively, a certain length is such as 5 mm, 1 cm, etc.; the tape thickness is the thickness of the connecting tape, such as between 0.05 mm and 0.2 mm, which is not limited here.

[0100] The battery material to be discarded includes a connecting tape section in which a first diaphragm roll and a second diaphragm roll are connected by a connecting tape.

[0101] Schematically, in the process of connecting the first diaphragm roll and the second diaphragm roll by connecting tape, the portion where the connecting tape is pasted in the first diaphragm roll and the portion where the connecting tape is pasted in the second diaphragm roll are called the connecting tape segment, and the connecting tape segment includes a small portion of the battery diaphragm in the first diaphragm roll, the connecting tape, and a small portion of the battery diaphragm in the second diaphragm roll.

[0102] Among them, due to the presence of connecting tape at the joint section, the battery separator cannot reasonably play its own isolation role, etc., so the battery separator at the joint section needs to be discarded.

[0103] Optionally, in the process of winding to discard the connecting segment, the battery separator with the connecting segment in the battery material is wound separately to obtain a finished waste material formed by separately wound battery separators. The relevant content will be introduced below and will not be repeated here.

[0104] Step 320, obtaining the electrode thickness corresponding to the secondary electrode material in the battery material as the waste material thickness.

[0105] In schematic form, secondary electrode materials refer to poor electrode materials that are judged to be substandard in quality during the production process of spiral wound batteries. The secondary electrode materials have defects in appearance, performance or other quality standards, and therefore cannot be used as effective electrode materials for the final spiral wound batteries.

[0106] Among them, the electrode material is the core battery material involved in energy conversion in the spiral wound battery. The electric energy conversion rate of the secondary electrode material does not meet the preset conversion rate, that is, the electric energy conversion efficiency (or charging and discharging performance) of the secondary electrode material during use cannot meet the designed or predetermined performance standards.

[0107] The electrode material includes at least one of a positive electrode and a negative electrode. Therefore, the secondary electrode material may be implemented as a secondary positive electrode, i.e., a bad positive electrode, or a secondary negative electrode, i.e., a bad negative electrode, or may include both a secondary positive electrode and a secondary negative electrode, which is not limited here.

[0108] Schematically, in the process of winding battery materials, there are usually longer positive electrode sheets and / or negative electrode sheets, as well as battery separators, which are used to isolate the battery electrode sheets; some of the electrode sheet materials may be secondary electrode sheet materials, such as: in a 10-meter positive electrode sheet, the 5.35-meter to 5.38-meter electrode sheets are secondary electrode sheet materials, etc., which are not limited here.

[0109] Optionally, after the secondary pole piece material is determined, the pole piece thickness corresponding to the secondary pole piece material is used as the waste material thickness for subsequent analysis.

[0110] Among them, the battery materials to be discarded include secondary electrode materials and battery separators used to discard secondary electrode materials.

[0111] Schematically, in the case of determining secondary materials, the battery materials to be discarded include not only secondary electrode sheet materials, but also battery separators used to isolate the wound secondary electrode sheet materials. The length of the battery separators wound around the secondary electrode sheet materials is usually the same as or similar to the length of the secondary electrode sheet materials. The discarded secondary electrode sheet materials are wound around the battery separators to avoid the problem of improper handling of the secondary electrode sheet materials.

[0112] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0113] In summary, the number of winding turns as constraint information in the battery material winding process is quantitatively determined through the winding needle radius, the thickness of the waste material and the winding constraint radius, so that in the process of winding the battery material to obtain the core battery, a reasonable winding process can be performed on the battery material that meets the preset waste conditions and needs to be discarded through the number of winding turns, thereby improving the targeting of the winding waste materials. When winding the discarded battery material to obtain the finished waste material that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset waste conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be jointly wound, ensure the utilization rate of materials, and provide more objective information for the preparation process of the core battery through the quantification process, thereby improving production efficiency and production execution.

[0114] In an optional embodiment, the difference between the winding constraint radius and the winding needle radius is used as the winding space information, and then the number of winding turns is determined by combining the winding space information and the thickness of the waste material; wherein different thicknesses of the waste material will also affect the determination of the number of winding turns. Figure 4 As shown above Figure 2 The illustrated step 230 may also be implemented as the following steps 410 to 440 .

[0115] Step 410, obtaining the difference between the winding constraint radius and the winding needle radius to obtain winding space information.

[0116] Schematically, the winding constraint radius is a pre-set value, and the winding constraint radius is determined by the angle of the carrying jaws used to carry the finished material obtained by winding, such as the winding constraint radius is the minimum radius of the carrying jaws used to carry the finished material obtained by winding at the maximum angle.

[0117] like Figure 5 , which is a schematic diagram of a handling clamp, wherein a minimum radius 510 is shown, and the minimum radius 510 is a preset value used when the handling clamp grabs the finished material.

[0118] Optionally, in the process of winding the battery material, the number of winding turns is analyzed by obtaining information such as the winding constraint radius and the winding needle radius, so as to determine the winding process to be adopted when the battery material to be discarded is detected by the winding number constraint.

[0119] Optionally, in the process of winding battery materials, if battery materials to be discarded are detected for the first time, the battery materials to be discarded will be wound first based on the constraints of the winding constraint radius to obtain a sample finished product, and then the finished product cross-section analysis will be performed based on the sample finished product to analyze the relationship between the information obtained from the cross-section such as the winding constraint radius and the winding needle radius.

[0120] Take the analysis of the finished product cross section of the sample finished product to determine the number of winding turns as an example. Figure 6 , which is a schematic diagram of a cross section of a sample finished product. The cross section of the finished product is in the form of an Archimedean spiral, wherein a winding constraint radius 610 is shown, such as the winding constraint radius being the minimum radius R of the handling clamp; and a winding needle radius 620 is also shown, which is the radius of the winding needle.

[0121] The larger winding constraint radius is taken as the minuend and the winding needle radius is taken as the subtrahend, and the difference between the two is obtained as the winding space information.

[0122] Schematically, the winding space information is used to characterize the space occupied by the wound battery material in the process of winding the battery material to obtain a finished material.

[0123] In an optional embodiment, the winding space information and the thickness of the waste material are analyzed to determine the number of winding turns of the battery material to be discarded.

[0124] Schematically, the thickness of the waste material is related to the battery material being wound and to be discarded. If analyzed from the finished cross-section of the sample product, the thickness of the waste material will affect the winding process. Therefore, the number of winding turns is determined by combining the winding space information and the thickness of the waste material.

[0125] Optionally, the process of analyzing the winding space information and the waste material thickness to obtain the number of winding turns may be implemented as the following steps 420 to 440 .

[0126] Step 420, obtaining the thickness of the battery separator in the battery material.

[0127] Schematically, the battery material includes a battery separator, and the thickness of the battery separator is called the separator thickness.

[0128] In the process of winding the battery materials to be discarded, no matter the battery materials to be discarded are connecting tape sections or secondary electrode materials, they all include battery separators; for example, if the battery materials to be discarded are connecting tape sections, the connecting tape sections include two layers of battery separators and a layer of connecting tape; if the battery materials to be discarded are secondary electrode materials, the secondary electrode materials also need to be wound through the battery separator for disposal, that is, the battery materials to be discarded include secondary electrode materials and battery separators.

[0129] Among them, when the battery materials to be discarded include secondary electrode sheet materials and battery separators, considering that the battery separator with a connecting section has no effective effect, the battery separator used to wind the secondary electrode sheet material does not have a connecting section.

[0130] Step 430, analyzing the winding space information and the thickness of the waste material to obtain the diaphragm winding space information.

[0131] Schematically, the contents of determining the separator winding space information for different battery materials to be discarded are introduced as follows.

[0132] (1) The waste material thickness is the tape thickness of the connecting tape connecting the first diaphragm roll and the second diaphragm roll.

[0133] Optionally, when the battery material to be discarded is a connecting tape segment, the thickness of the discarded material is the thickness of the connecting tape in the connecting tape segment; therefore, when analyzing the winding space information and the thickness of the discarded material, the winding space information and the tape thickness are comprehensively analyzed to obtain the diaphragm winding space information.

[0134] In an optional embodiment, when the battery material to be discarded includes a joint tape section of a first separator roll and a second separator roll connected by a connecting tape, the difference between the winding space information and the tape thickness is used as the separator winding space information.

[0135] Indicatively, the winding space information is taken as the minuend, and the tape thickness is taken as the subtrahend, so that the difference between the two is obtained as the diaphragm winding space information.

[0136] Schematically, the separator winding space information is used to characterize the space occupied by the battery separator in the wound battery material during the process of winding the battery material to obtain the finished material.

[0137] like Figure 6 As shown, there is a waste material thickness, such as expressed as Figure 6 b1 or b2 (b1 / b2); when the battery material to be discarded is a connecting tape segment, the thickness of the discarded material represents the thickness of the connecting tape in the connecting tape segment; if the thickness of the discarded material is b1, it represents the thickness of the tape, and b2 represents the thickness of the secondary electrode material.

[0138] In some embodiments, the number of diaphragm roll switching times is determined based on the winding constraint radius and the diaphragm length of the diaphragm roll; the total tape thickness is determined based on the number of diaphragm roll switching times and the tape thickness; and the difference between the winding space information and the total tape thickness is used as the diaphragm winding space information.

[0139] The number of membrane roll switching is used to characterize the number of membrane rolls switched. Schematically, the membrane length is the length of the battery membrane in one membrane roll. If the membrane length is small, multiple membrane rolls may be switched during the process of winding the battery material to be discarded within the winding constraint radius.

[0140] Optionally, if this situation exists, the total winding length is predicted based on the winding constraint radius, the total winding length being the length required to wind the battery separator under the winding constraint radius; the quotient of the total winding length and the separator length is taken as the number of separator roll switching times; then the product of the number of separator roll switching times and the tape thickness is taken as the sum of the tape thicknesses, the sum of the tape thicknesses representing the sum of the tape thicknesses of the connecting tapes used when switching multiple separator rolls; thereby the difference between the winding space information and the sum of the tape thicknesses is taken as the separator winding space information.

[0141] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0142] (2) The thickness of the waste material is the thickness of the electrode corresponding to the secondary electrode material.

[0143] Optionally, when the battery materials to be discarded are secondary electrode materials and battery separators, the thickness of the discarded materials is the electrode thickness of the secondary electrode materials; therefore, when analyzing the winding space information and the thickness of the discarded materials, the winding space information and the electrode thickness are comprehensively analyzed to obtain the separator winding space information.

[0144] In an optional embodiment, when the battery material to be discarded includes secondary electrode sheet material and a battery separator for discarding the secondary electrode sheet material, the number of electrode sheet windings is obtained in the cross-sectional dimension of the finished waste material product.

[0145] Illustratively, the waste material product being analyzed at this time can be realized as the above-mentioned sample product, that is, when the sample product is obtained, the number of pole piece windings during the winding process is analyzed based on the finished product cross-section (i.e., cross-sectional dimension) of the sample product.

[0146] Among them, the number of pole sheet windings is used to characterize the number of windings of the pole sheet material in the finished waste material product obtained by winding the secondary pole sheet material and the battery separator.

[0147] Schematically, in the process of winding battery materials including secondary electrode sheet materials and battery separators, the electrode sheet materials in the battery materials may all be secondary electrode sheet materials, or part of them may be secondary electrode sheet materials and part of them may be normal electrode sheet materials. Therefore, when counting the number of electrode sheet windings, when the electrode sheet materials are all secondary electrode sheet materials, the number of windings of the secondary electrode sheet materials is counted; when the electrode sheet materials are partly secondary electrode sheet materials and partly normal electrode sheet materials, the number of windings of the secondary electrode sheet materials and the normal electrode sheet materials is counted.

[0148] In some embodiments, in the process of winding the pole sheet material through the battery separator to avoid unsafe conditions, the number of windings of the pole sheet and the number of windings of the separator of the battery separator may not be the same.

[0149] Indicatively, the diaphragm width of a battery diaphragm is usually greater than the material width of a pole piece material, but this does not mean that a single-layer battery diaphragm - the winding method of a single-layer pole piece material can perfectly wrap the pole piece material, because: the battery diaphragm not only wraps the surface of the pole piece material, but also needs to cover both sides of the pole piece material, as well as ensure the sealing of the entire winding. In addition, when the diaphragm width of the battery diaphragm exceeds the material width, it will overlap during winding, requiring more turns to wrap the pole piece material; in addition, the material of the battery diaphragm is relatively soft and may stretch or slightly stretch, which also results in it requiring more turns to completely cover each turn of the pole piece material. Therefore, the diaphragm winding number of the battery diaphragm is usually more than the pole piece winding number of the pole piece material.

[0150] In an optional embodiment, the pole piece winding space information is obtained based on the number of pole piece windings and the pole piece thickness.

[0151] Schematically, the pole piece thickness is the thickness of the wound pole piece material, and the wound pole piece material is the secondary pole piece material or part of the secondary pole piece material and part of the normal pole piece material; the product of the number of pole piece winding turns and the pole piece thickness is used as the pole piece winding space information.

[0152] Schematically, the pole piece winding space information is used to characterize the space occupied by the wound pole piece material in the process of winding the battery material to obtain the finished material.

[0153] In an optional embodiment, the difference between the winding space information and the pole piece winding space information is used as the diaphragm winding space information.

[0154] In schematic form, the winding space information is taken as the minuend and the pole piece winding space information is taken as the subtrahend, and the difference between the two is obtained as the diaphragm winding space information. The diaphragm winding space information represents the space for winding the battery diaphragm in the total winding space information except the pole piece winding space information.

[0155] Step 440, obtaining the number of winding turns of the separator corresponding to the battery separator in the battery material to be discarded as the number of winding turns through the separator winding space information and the separator thickness.

[0156] In an optional embodiment, the quotient of the membrane winding space information and twice the membrane thickness is used as the number of winding turns.

[0157] In schematic form, considering that the above analysis is performed based on the radius, the twice the value of the diaphragm thickness is first obtained, and then the diaphragm winding space information is used as the dividend and the twice the value of the diaphragm thickness is used as the divisor to obtain the quotient of the two. The quotient represents the number of diaphragm winding turns of the battery diaphragm in the battery material to be discarded. The number of diaphragm winding turns is used as the number of winding turns to constrain the diaphragm usage of the battery diaphragm used in the winding process.

[0158] That is, the number of winding turns is used to restrict the usage of the battery separator in the process of winding the battery material to be discarded.

[0159] In some embodiments, when the battery material to be discarded is a connecting tape segment connecting the first diaphragm roll and the second diaphragm roll through a connecting tape, the thickness of the discarded material is the tape thickness of the connecting tape between the first diaphragm roll and the second diaphragm roll; at this time, the battery diaphragm with the connecting tape segment is usually not effective, so the battery diaphragm with the connecting tape segment can be separately wound and discarded, and this process can be called a separate diaphragm winding process; the number of winding turns of the battery diaphragm in the separate diaphragm winding process is shown in the following formula 1.

[0160] Formula 1: Number of winding turns (n1) = (Rr-b1) / (2*diaphragm thickness).

[0161] Among them, R is the winding radius constraint radius; r is the winding needle radius; b1 is the tape thickness.

[0162] Among them, considering that the length of the battery diaphragm in a single diaphragm roll is usually long, when the diaphragm roll is switched to wind the joint segment, the finished material formed based on the winding constraint radius usually includes only one joint segment, so (Rr) is subtracted from one b1; if there are multiple joint segments (such as the sample finished product includes multiple joint segments, or it is predicted that there are multiple joint segments), (Rr) can be calculated when calculating the number of winding turns by subtracting multiple b1 (the same as the number of joint segments), which is not limited here.

[0163] In some embodiments, when the battery material to be discarded is a secondary electrode sheet material and a battery separator for discarding the secondary electrode sheet material, the thickness of the discarded material is the thickness of the electrode sheet that is wound, including the secondary electrode sheet material; at this time, the secondary electrode sheet material needs to be discarded by winding a battery separator with an effective function (such as effectively isolating the electrode sheet material), so the effective battery separator and the secondary electrode sheet material are jointly wound and discarded, and this process can be called a electrode sheet winding process; the number of winding turns of the battery separator in the electrode sheet winding process is shown in the following formula 2.

[0164] Formula 2: Number of windings (n2) = (Rr-b2*number of pole piece windings) / (2*diaphragm thickness).

[0165] Among them, R is the winding radius constraint radius; r is the winding needle radius; b2 is the pole piece thickness.

[0166] Among them, the number of electrode sheet windings is the number of windings of the electrode sheet material including the secondary electrode sheet material in the sample finished product, wherein the electrode sheet material in the battery material may be all secondary electrode sheet material, or may be partially secondary electrode sheet material and partially normal electrode sheet material.

[0167] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0168] In summary, the number of winding turns as constraint information in the battery material winding process is quantitatively determined through the winding needle radius, the thickness of the waste material and the winding constraint radius, so that in the process of winding the battery material to obtain the core battery, a reasonable winding process can be performed on the battery material that meets the preset waste conditions and needs to be discarded through the number of winding turns, thereby improving the targeting of the winding waste materials. When winding the discarded battery material to obtain the finished waste material that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset waste conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be jointly wound, ensure the utilization rate of materials, and provide more objective information for the preparation process of the core battery through the quantification process, thereby improving production efficiency and production execution.

[0169] In an embodiment of the present application, the number of winding turns determined based on the above method is the number of diaphragm winding turns obtained based on the analysis of the finished product of the waste material (such as the sample finished product obtained by the first detection of the diseased winding). Through accurate analysis of the number of diaphragm winding turns, it is helpful to use the number of winding turns to preset the consumption of the battery diaphragm in the process of there being discarded battery materials that need to be wound up in the future. That is, the number of turns that the battery diaphragm needs to be wound is determined by theoretical calculation to avoid the problem of excessive consumption of the battery diaphragm due to failure to pass quantitative confirmation. Considering that whether it is the waste of secondary electrode materials or the waste of docking band segments, the wound battery materials include battery diaphragms, so this process can effectively reduce the waste of battery diaphragm winding and improve the utilization rate of battery diaphragms.

[0170] In an optional embodiment, the winding length is determined by the number of winding turns, so that in the process of preparing a rolled core battery by winding the battery material, the battery material portion that meets the preset waste conditions is wound based on the number of winding turns as the winding basis to obtain a finished waste material that needs to be discarded. Figure 7 As shown above Figure 2 The illustrated step 240 may also be implemented as step 710 as follows.

[0171] Step 710, in the process of preparing a rolled core battery using battery materials, when the i-th section of battery material meets the preset discard conditions, the i-th section of battery material is wound by a winding needle based on the number of winding turns to obtain a waste material finished product with the same number of waste finished products.

[0172] Wherein, i is a positive integer;

[0173] Optionally, taking the process of winding battery materials on a production line to prepare a core battery as an example, the battery materials to be wound on the production line are usually long, and the i-th battery material portion is any portion of the battery material therein. The battery material portion is usually not a fixed division, but refers to any selected portion of a whole block of battery material; if the i-th battery material portion meets the preset discard conditions, it needs to be wound to discard the i-th battery material portion.

[0174] Illustratively, the preset discarding conditions include the presence of secondary electrode material, such as the positive electrode and / or the negative electrode has problems such as poor preparation, in which case the secondary electrode material needs to be discarded; or, the preset discarding conditions include diaphragm roll switching conditions, such as the battery diaphragm is provided by a diaphragm roll, if the current diaphragm roll is used up, it is necessary to switch to the next diaphragm roll, the next diaphragm roll and the current diaphragm roll need to be connected by a connecting tape, the connection is called a joint section, the joint section cannot play a normal isolation role for the battery diaphragm due to the presence of the connecting tape, and therefore the joint section with the connecting tape needs to be discarded.

[0175] Among them, the i-th battery material portion corresponds to the material length, and the material length represents the length of the i-th battery material portion. For example, if the material length is 59.6 mm, it means that there is 59.6 mm of the i-th battery material portion in the battery material to be wound, which meets the preset discarding conditions, and therefore the 59.6 mm battery material portion needs to be discarded.

[0176] In an optional embodiment, when the i-th battery material portion meets the diaphragm winding switching conditions, the i-th battery material portion including the connecting tape segment is wound by a winding needle based on the number of winding turns to obtain a first number of waste material finished products.

[0177] Schematically, the diaphragm roll switching condition represents that the current diaphragm roll (first diaphragm roll) used to provide battery diaphragms is switched to a new diaphragm roll (second diaphragm roll). At this time, the i-th segment of battery material that meets the diaphragm roll switching condition can be understood as a connecting segment having the first diaphragm roll and the second diaphragm roll connected by a connecting tape; the connecting segment is the connecting portion between the first diaphragm roll and the second diaphragm roll indicated by the diaphragm roll switching condition, the connecting segment corresponds to the connecting segment length, and the first number of discarded finished products is determined based on the first quotient value between the winding length and the connecting segment length.

[0178] Schematically, the winding length is the unwinding length of the finished material obtained by winding.

[0179] Optionally, after obtaining the number of winding turns, the winding length is obtained by the number of winding turns and the winding constraint radius.

[0180] Schematically, the number of winding turns follows the law of the Archimedean curve. When the number of winding turns and the winding constraint radius are known, the winding length expanded by the number of winding turns can be obtained by integration.

[0181] Optionally, if the winding length is determined based on the sample finished product, the winding starting point and winding end point of the battery material before winding to obtain the sample finished product can be determined, so that the difference between the winding end point and the winding starting point is taken as the winding length. The determination of the winding length is not limited here.

[0182] At this time, the calculated number of winding turns is used as the winding basis to wind the i-th section of battery material through the winding needle. The material length corresponding to the i-th section of battery material is the length of the connecting tape section between the first diaphragm roll and the second diaphragm roll indicated by the diaphragm roll switching condition.

[0183] Schematically, when the battery material that meets the preset discard conditions is implemented as a connecting section, the material length is the length of the connecting section; the first quotient is determined with the winding length as the dividend and the length of the connecting section as the divisor. If the first quotient is less than or equal to 1, the first number of discarded finished products is 1. If the first quotient is greater than 1, the first number of discarded finished products is determined by taking an upward value.

[0184] In an optional embodiment, when the i-th section of battery material meets the electrode waste conditions, the i-th section of battery material including the secondary electrode material is wound by a winding needle based on the number of winding turns to obtain a second number of waste finished products.

[0185] The secondary pole piece material is the pole piece material indicated by the pole piece discard condition, and the second discarded finished product quantity is determined based on the second quotient value between the winding length and the secondary pole piece length.

[0186] Schematically, the electrode waste condition represents that the electrode material (such as the positive electrode and the negative electrode) is bad (cannot be used effectively). At this time, the i-th section of the battery material that meets the electrode waste condition can be understood as a bad secondary electrode material, and the battery separator used to wind the secondary electrode material; at this time, the number of winding turns obtained by calculation is used as the winding reference, and the i-th section of the battery material is wound by the winding needle. The material length corresponding to the i-th section of the battery material is the secondary electrode length of the secondary electrode material indicated by the electrode waste condition.

[0187] Schematically, when the battery material that meets the preset discard conditions is realized as a secondary electrode material, the material length is the secondary electrode length corresponding to the secondary electrode material; the second quotient is determined with the winding length as the dividend and the secondary electrode length as the divisor. If the second quotient is less than or equal to 1, the second number of discarded finished products is 1. If the second quotient is greater than 1, the second number of discarded finished products is determined by taking an upward value.

[0188] That is, the number of discarded finished products is determined based on the winding length corresponding to the number of winding turns and the material length corresponding to the i-th section of the battery material portion.

[0189] That is: when winding the i-th section of battery material portion based on the number of winding turns as the winding basis, the winding equipment controls the i-th section of battery material portion to be wound to the number of winding turns, and a finished waste material product can be obtained; thereafter, if the i-th section of battery material portion has not been completely wound (that is, the material length is greater than the winding length), the number of winding turns is continued to be used as the winding basis, and the remaining battery material portion of the i-th section of battery material portion that has not been completely wound is continued to be wound to the number of winding turns, and another finished waste material product can be obtained; repeating the above process can obtain at least one finished waste material product, so that at least one finished waste material product can be successfully clamped out and scrapped by the handling clamp corresponding to the winding constraint radius.

[0190] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0191] In some embodiments, when winding the i-th section of battery material, it is detected in real time whether the battery material no longer meets the preset discard conditions. If so, after the winding is completed to obtain the finished product of the currently wound material, the winding process is no longer carried out based on the number of winding turns as the winding basis; if not, after the winding is completed to obtain the finished product of the currently wound material, the winding process continues to be carried out based on the number of winding turns as the winding basis.

[0192] In an optional embodiment, in the process of winding the battery material to prepare a wound battery, the first i-1 sections of the battery material are wound using a first winding constraint radius.

[0193] Among them, the battery material part of section i-1 does not meet the preset disposal conditions.

[0194] Illustratively, when a battery material is wound by a winding device to prepare a rolled battery, the first i-1 segments of the battery material that do not meet the preset discard conditions can be wound by a preset first winding constraint radius to obtain at least one finished material that does not need to be discarded to prepare at least one rolled battery.

[0195] In an optional embodiment, when the i-th section of battery material portion meets the preset discarding condition, the i-th section of battery material portion is wound using a second winding constraint radius.

[0196] The second winding constraint radius is smaller than the first winding constraint radius.

[0197] Indicatively, if the winding device detects that the i-th section of the battery material portion meets the preset waste conditions, the i-th section of the battery material portion is wound by the second winding preset radius. Optionally, the gripping angle of the carrying jaws can be adjusted without changing the carrying jaws, the second winding constraint radius is the minimum radius at the maximum gripping angle, and the first winding constraint radius is the gripping radius at a smaller gripping angle (such as the maximum radius at the minimum gripping angle, or the radius at other gripping angles, etc.); if the i-th section of the battery material portion meets the preset waste conditions, while hoping to successfully carry the finished waste material obtained by winding the i-th section of the battery material portion through the carrying jaws for disposal, it is also hoped that the finished waste material obtained by winding the i-th section of the battery material portion is smaller, so the i-th section of the battery material portion can be wound with a second winding constraint radius that is smaller than the first winding constraint radius.

[0198] In an optional embodiment, when the i+1th section of battery material portion meets the preset discarding condition, the i+1th section of battery material portion is wound using a third winding constraint radius.

[0199] The third winding constraint radius is greater than the second winding constraint radius.

[0200] Optionally, the third winding constraint radius and the first winding constraint radius can be equal, that is, the second winding constraint radius is used when winding the i-th battery material portion that meets the preset discard conditions, and a fixed winding constraint radius (the first winding constraint radius or the third winding constraint radius) larger than the second winding constraint radius is used when winding other battery material portions that do not meet the preset discard conditions.

[0201] Optionally, the third winding constraint radius and the first winding constraint radius may be different. For example, the first winding constraint radius is used during the initial winding, and the second winding constraint radius is used when winding the i-th battery material portion that meets the preset discard conditions, and when winding other battery material portions that do not meet the preset discard conditions again, a third winding constraint radius that is larger than the second winding constraint radius is used. The third winding constraint radius may be larger than the first winding constraint radius or smaller than the first winding constraint radius, which is not limited here.

[0202] In an optional embodiment, in the process of preparing a rolled battery using battery materials, in response to detecting that the mth battery material portion meets the preset discard conditions, the mth battery material portion is wound at a first winding speed based on the number of winding turns; in response to detecting that the nth battery material portion does not meet the preset discard conditions, the nth battery material portion is wound at a second winding speed, the first winding speed is different from the second winding speed, and m and n are positive integers.

[0203] Optionally, the mth battery material part is any battery material part. If it meets the preset discard conditions, the winding process for the mth battery material part is performed at a smaller first winding speed to avoid winding too fast and failing to accurately and perfectly wind the mth battery material part. For the nth battery material part that does not meet the preset discard conditions, a faster second winding speed is used to wind the nth battery material part to ensure the winding efficiency of the normal battery material part.

[0204] Optionally, when the mth battery material portion meets the preset discard conditions, the winding process for the mth battery material portion can be performed at a larger first winding speed to avoid the problem of spending too much time on winding the waste materials; for the nth battery material portion that does not meet the preset discard conditions, a smaller second winding speed can be used to wind the nth battery material portion to avoid the problem of incorrect winding of normal battery material portions, etc.

[0205] In an optional embodiment, in response to detecting that the j-th battery material portion is a secondary electrode material whose power conversion rate does not meet the preset conversion rate, the conversion rate difference between the power conversion rate and the preset conversion rate is obtained, and j is a positive integer.

[0206] Indicatively, the electric energy conversion rate not meeting the preset conversion rate is an illustrative preset discard condition; usually, if the electric energy conversion rate of the electrode material is less than the preset conversion rate, it is deemed to have reached the preset discard condition, and the electrode material is a secondary electrode material. The secondary electrode material may be part of the electrode material in the battery material, or it may be all of the electrode material in the battery material, which is not limited here.

[0207] Optionally, when the electric energy conversion rate does not reach a preset conversion rate, a conversion rate difference between the preset conversion rate and the electric energy conversion rate is obtained.

[0208] In an optional embodiment, the winding constraint radius used when the waste material is wound by the winding needle is determined based on the conversion rate difference; wherein the conversion rate difference is in direct proportion to the winding constraint radius.

[0209] Illustratively, the conversion rate difference affects the winding constraint radius used when winding the waste material, such as the winding constraint radius corresponds to a radius range; the larger the conversion rate difference, the larger the radius is selected from the radius range as the winding constraint radius; the smaller the conversion rate difference, the smaller the radius is selected from the radius range as the winding constraint radius, and so on, which is not limited here.

[0210] It is worth noting that the above are merely illustrative examples and are not limited to the embodiments of the present application.

[0211] In summary, the number of winding turns as constraint information in the battery material winding process is quantitatively determined through the winding needle radius, the thickness of the waste material and the winding constraint radius, so that in the process of winding the battery material to obtain the core battery, a reasonable winding process can be performed on the battery material that meets the preset waste conditions and needs to be discarded through the number of winding turns, thereby improving the targeting of the winding waste materials. When winding the discarded battery material to obtain the finished waste material that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset waste conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be jointly wound, ensure the utilization rate of materials, and provide more objective information for the preparation process of the core battery through the quantification process, thereby improving production efficiency and production execution.

[0212] In the embodiments of the present application, the contents of the winding process based on the number of winding turns constraints are introduced. By quantitatively determining the number of winding turns, it helps to guide the winding equipment to perform the winding process of the number of winding turns in a targeted manner, thereby avoiding the winding of too large a finished material, which can effectively reduce the waste of battery materials, especially the waste of battery separators. In addition, flexible adjustment of the winding constraint radius and / or winding speed can also make the winding process more flexible and improve the winding accuracy and efficiency.

[0213] Figure 8is a structural block diagram of a winding device for battery materials provided by an exemplary embodiment of the present application, which can also be regarded as the above-mentioned winding device for winding battery materials, such as Figure 8 As shown, the device includes the following parts:

[0214] An acquisition module 810 is used to acquire a radius of a winding needle used for winding battery materials;

[0215] The acquisition module 810 is further used to acquire the thickness of the waste material and the preset winding constraint radius used when the waste material is wound by the winding needle, wherein the thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded;

[0216] A determination module 820, configured to determine the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius;

[0217] The winding module 830 is used to wind the portion of the battery material that meets the preset discarding conditions during the process of preparing a core-wound battery using the battery material, taking the number of winding turns as the winding basis.

[0218] In an optional embodiment, the acquisition module 810 is also used to obtain the tape thickness of the connecting tape used to connect the first diaphragm roll and the second diaphragm roll as the waste material thickness, the first diaphragm roll and the second diaphragm roll are different diaphragm rolls used to provide battery diaphragms in the battery material, and the battery material to be discarded includes a connecting tape section that connects the first diaphragm roll and the second diaphragm roll through the connecting tape.

[0219] In an optional embodiment, the acquisition module 810 is also used to obtain the electrode thickness corresponding to the secondary electrode material in the battery material as the waste material thickness, the battery material to be discarded includes the secondary electrode material and a battery separator used to discard the secondary electrode material, and the electric energy conversion rate of the secondary electrode material does not meet the preset conversion rate; wherein the electrode material includes at least one of a positive electrode sheet and a negative electrode sheet.

[0220] In an optional embodiment, the determination module 820 is also used to obtain the difference between the winding constraint radius and the winding needle radius to obtain winding space information; analyze the winding space information and the thickness of the waste material to determine the number of winding turns of the battery material to be discarded.

[0221] In an optional embodiment, the determination module 820 is also used to obtain the membrane thickness of the battery membrane in the battery material; analyze the winding space information and the thickness of the waste material to obtain the membrane winding space information, and the membrane winding space information is used to characterize the space occupied by the battery membrane in the wound battery material; through the membrane winding space information and the membrane thickness, the number of membrane winding turns corresponding to the battery membrane in the battery material to be discarded is obtained as the winding number.

[0222] In an optional embodiment, the determination module 820 is also used to, when the battery material to be discarded includes a connecting tape section in which a first diaphragm roll and a second diaphragm roll are connected by a connecting tape, use the difference between the winding space information and the tape thickness as the diaphragm winding space information; or, based on the winding constraint radius and the diaphragm length of the diaphragm roll, determine the number of diaphragm roll switching times, and the number of diaphragm roll switching times is used to characterize the number of switched diaphragm rolls; determine the sum of the tape thicknesses based on the number of diaphragm roll switching times and the tape thickness; and use the difference between the winding space information and the sum of the tape thicknesses as the diaphragm winding space information.

[0223] In an optional embodiment, the determination module 820 is also used to obtain the number of pole sheet windings in the cross-sectional dimension of the finished waste material product when the battery material to be discarded includes a secondary pole sheet material and a battery separator for discarding the secondary pole sheet material, the number of pole sheet windings being used to characterize the number of windings of the secondary pole sheet material in the finished waste material product obtained by winding the secondary pole sheet material and the battery separator; obtain pole sheet winding space information based on the number of pole sheet windings and the pole sheet thickness; and use the difference between the winding space information and the pole sheet winding space information as the separator winding space information.

[0224] In an optional embodiment, the determination module 820 is further configured to use the quotient of the diaphragm winding space information and twice the diaphragm thickness as the number of winding turns.

[0225] In an optional embodiment, the winding module 830 is also used to, in the process of preparing a core battery using the battery material, when the i-th section of the battery material portion meets the preset discarding condition, use the winding number as the winding reference, and use the winding needle to wind the i-th section of the battery material portion to obtain a number of discarded finished products of discarded material; wherein i is a positive integer, and the number of discarded finished products is determined based on the winding length corresponding to the winding number of turns and the material length corresponding to the i-th section of the battery material portion.

[0226] In an optional embodiment, the winding module 830 is also used to, when the i-th segment of the battery material portion meets the diaphragm roll switching condition, use the winding number as the winding reference, and use the winding needle to wind the i-th segment of the battery material portion including the connecting section to obtain a first number of waste material products; wherein the connecting section is the connecting part between the first diaphragm roll and the second diaphragm roll indicated by the diaphragm roll switching condition, the connecting section corresponds to the connecting section length, and the first number of waste products is determined based on a first quotient value between the winding length and the connecting section length.

[0227] In an optional embodiment, the winding module 830 is also used to, when the i-th section of battery material meets the electrode waste condition, use the winding number as the winding reference, and use the winding needle to wind the i-th section of battery material including the secondary electrode material to obtain a second number of waste finished products of waste material; wherein the secondary electrode material is the electrode material indicated by the electrode waste condition, and the second number of waste finished products is determined based on the second quotient between the winding length and the secondary electrode length.

[0228] In an optional embodiment, the winding module 830 is also used to, in the process of winding the battery material to prepare the rolled battery, use a first winding constraint radius to wind the first i-1 segments of battery material, and the i-1 segment of battery material does not meet the preset discarding conditions; when the i-th segment of battery material meets the preset discarding conditions, use a second winding constraint radius to wind the i-th segment of battery material, and the second winding constraint radius is smaller than the first winding constraint radius; when the i+1 segment of battery material meets the preset discarding conditions, use a third winding constraint radius to wind the i+1 segment of battery material, and the third winding constraint radius is larger than the second winding constraint radius.

[0229] In an optional embodiment, the winding module 830 is also used to, in the process of preparing the core battery using the battery material, in response to detecting that the mth battery material portion meets the preset discard condition, wind the mth battery material portion at a first winding speed with the number of winding turns as a winding reference; in response to detecting that the nth battery material portion does not meet the preset discard condition, wind the nth battery material portion at a second winding speed, the first winding speed is different from the second winding speed, and m and n are positive integers.

[0230] In an optional embodiment, the acquisition module 810 is also used to obtain the conversion rate difference between the electric energy conversion rate and the preset conversion rate in response to detecting that the j-th battery material part is a secondary electrode material whose electric energy conversion rate does not meet the preset conversion rate, where j is a positive integer; based on the conversion rate difference, determine the winding constraint radius used when winding the waste material by the winding needle; wherein the conversion rate difference is directly proportional to the winding constraint radius.

[0231] In summary, the number of winding turns as constraint information in the battery material winding process is quantitatively determined through the winding needle radius, the thickness of the waste material and the winding constraint radius, so that in the process of winding the battery material to obtain the core battery, a reasonable winding process can be performed on the battery material that meets the preset waste conditions and needs to be discarded through the number of winding turns, thereby improving the targeting of the winding waste materials. When winding the discarded battery material to obtain the finished waste material that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset waste conditions. The constraint of the number of winding turns helps to avoid excessive waste of normal battery materials that need to be jointly wound, ensure the utilization rate of materials, and provide more objective information for the preparation process of the core battery through the quantification process, thereby improving production efficiency and production execution.

[0232] It should be noted that the winding device for battery materials provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the winding device for battery materials provided in the above embodiment and the winding method embodiment for battery materials belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0233] Fig. 9 The structural block diagram of an electronic device 900 provided by an exemplary embodiment of the present application is shown. The electronic device 900 may be a portable mobile terminal, such as a smart phone, a vehicle-mounted terminal, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 (Moving Picture Experts Group Audio Layer IV), a laptop computer or a desktop computer. The electronic device 900 may also be referred to as a user device, a portable terminal, a laptop terminal, a desktop terminal or other names. The electronic device 900 may be used to control a winding device, such as controlling the winding device to perform a corresponding winding process through a mobile terminal or a desktop computer to wind up the battery material.

[0234] Typically, the electronic device 900 includes a processor 901 and a memory 902 .

[0235] The processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 901 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array).

[0236] The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 902 is used to store at least one instruction, which is used to be executed by the processor 901 to implement the winding method of the battery material provided in the method embodiment of the present application.

[0237] In some embodiments, the electronic device 900 further includes one or more sensors, including but not limited to: a proximity sensor, a gyroscope sensor, and a pressure sensor.

[0238] The embodiment of the present application also provides a computer device, which can be implemented as a terminal or a server. The computer device includes a processor and a memory, in which at least one instruction, at least one program, code set or instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the winding method of the battery material provided by the above-mentioned method embodiments.

[0239] An embodiment of the present application also provides a computer-readable storage medium, on which is stored at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the battery material winding method provided in the above-mentioned method embodiments.

[0240] The embodiments of the present application also provide a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the winding method of the battery material described in any of the above embodiments.

[0241] Optionally, the computer readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a solid state drive (SSD), or an optical disk. Among them, the random access memory may include a resistance random access memory (ReRAM) and a dynamic random access memory (DRAM). The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0242] Those skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or by a program to instruct the relevant hardware to complete, and the program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc. The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for winding a battery material, characterized in that: The method comprises: Obtaining a winding needle radius of a winding needle used for winding battery materials; Obtaining the thickness of the waste material, and obtaining the preset winding constraint radius used when the waste material is wound by the winding needle, wherein the thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded; Determining the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius; Taking the number of winding turns as the winding basis, in the process of preparing a core-wound battery using the battery material, a portion of the battery material that meets the preset discarding conditions is wound.

2. The method according to claim 1, characterized in that The step of obtaining the thickness of the waste material comprises: The tape thickness of the connecting tape used to connect the first diaphragm roll and the second diaphragm roll is obtained as the thickness of the waste material, the first diaphragm roll and the second diaphragm roll are different diaphragm rolls used to provide battery diaphragms in the battery material, and the battery material to be discarded includes a connecting tape section connecting the first diaphragm roll and the second diaphragm roll through the connecting tape.

3. The method according to claim 1, characterized in that The step of obtaining the thickness of the waste material comprises: The electrode sheet thickness corresponding to the secondary electrode sheet material in the battery material is obtained as the waste material thickness, the battery material to be discarded includes the secondary electrode sheet material and a battery separator for discarding the secondary electrode sheet material, and the electric energy conversion rate of the secondary electrode sheet material does not meet the preset conversion rate; wherein the electrode sheet material includes at least one of a positive electrode sheet and a negative electrode sheet.

4. The method according to any one of claims 1 to 3, characterized in that: The step of determining the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius comprises: Obtaining the difference between the winding constraint radius and the winding needle radius to obtain winding space information; The winding space information and the thickness of the waste material are analyzed to determine the number of winding turns of the battery material to be discarded.

5. The method according to claim 4, characterized in that The analyzing the winding space information and the thickness of the waste material to determine the number of winding turns of the battery material to be discarded includes: Obtaining the thickness of a battery separator in the battery material; Analyzing the winding space information and the thickness of the waste material to obtain separator winding space information, wherein the separator winding space information is used to characterize the space occupied by the battery separator in the wound battery material; The number of winding turns of the separator corresponding to the battery separator in the battery material to be discarded is obtained as the number of winding turns through the separator winding space information and the separator thickness.

6. The method according to claim 5, characterized in that The analyzing the winding space information and the waste material thickness to obtain the diaphragm winding space information includes: In the case where the battery material to be discarded includes a connecting tape section connecting a first diaphragm roll and a second diaphragm roll by a connecting tape, the difference between the winding space information and the tape thickness is used as the diaphragm winding space information; or, Based on the winding constraint radius and the diaphragm length of the diaphragm roll, the diaphragm roll switching times are determined, and the diaphragm roll switching times are used to characterize the number of switched diaphragm rolls; based on the diaphragm roll switching times and the tape thickness, the tape thickness and the adhesive tape thickness are determined; and the difference between the winding space information and the tape thickness and the adhesive tape thickness is used as the diaphragm winding space information.

7. The method according to claim 5, characterized in that The step of analyzing the winding space information and the waste material thickness to obtain the diaphragm winding space information includes: In the case where the battery material to be discarded includes a secondary electrode sheet material and a battery separator for discarding the secondary electrode sheet material, the number of electrode sheet windings is obtained in the cross-sectional dimension of the finished waste material product, and the number of electrode sheet windings is used to characterize the number of windings of the secondary electrode sheet material in the finished waste material product obtained by winding the secondary electrode sheet material and the battery separator; the electrode sheet winding space information is obtained based on the number of electrode sheet windings and the electrode sheet thickness; The difference between the winding space information and the pole piece winding space information is used as the diaphragm winding space information.

8. The method according to claim 5, characterized in that The step of obtaining the winding number of the battery material to be discarded by using the separator winding space information and the separator thickness includes: The quotient of the diaphragm winding space information and twice the diaphragm thickness is taken as the number of winding turns.

9. The method according to any one of claims 1 to 3, characterized in that: The method of taking the number of winding turns as the winding reference and winding a portion of the battery material that meets a preset discard condition in the process of preparing a wound core battery using the battery material comprises: In the process of preparing a rolled core battery using the battery material, when the i-th section of the battery material portion meets the preset waste condition, the i-th section of the battery material portion is wound by the winding needle with the number of winding turns as the winding reference, to obtain a waste material finished product with the number of waste finished products; Wherein, i is a positive integer, and the number of discarded finished products is determined based on the winding length corresponding to the number of winding turns and the material length corresponding to the i-th section of battery material.

10. The method according to claim 9, characterized in that When the i-th section of battery material meets the preset waste condition, the i-th section of battery material is wound by the winding needle with the number of winding turns as the winding reference to obtain the waste material finished product with the number of waste finished products, including: When the i-th section of battery material meets the separator winding switching condition, the i-th section of battery material including the tape section is wound by the winding needle with the winding number as the winding reference to obtain a first number of waste material finished products; Among them, the joint section is the connecting part between the first diaphragm roll and the second diaphragm roll indicated by the diaphragm roll switching condition, the joint section corresponds to the joint section length, and the first number of discarded finished products is determined based on the first quotient value between the winding length and the joint section length.

11. The method according to claim 9, characterized in that When the i-th section of the battery material portion meets the preset discarding condition, taking the winding number as the winding reference, winding the i-th section of the battery material portion by the winding needle, comprises: When the i-th section of battery material meets the electrode sheet discarding condition, the i-th section of battery material including the secondary electrode sheet material is wound by the winding needle with the winding number as the winding reference to obtain a second number of waste material finished products; The secondary pole piece material is the pole piece material indicated by the pole piece discard condition, and the second discarded finished product quantity is determined based on a second quotient value between the winding length and the secondary pole piece length.

12. The method according to claim 9, characterized in that In the process of preparing a rolled core battery by using the battery material, when the i-th section of the battery material portion meets the preset discarding condition, taking the winding number as the winding reference, winding the i-th section of the battery material portion by the winding needle, including: In the process of winding the battery material to prepare the wound battery, the first i-1 segment of the battery material is wound using a first winding constraint radius, and the i-1 segment of the battery material does not meet the preset discarding condition; When the i-th section of battery material meets the preset discarding condition, the i-th section of battery material is wound with a second winding constraint radius, and the second winding constraint radius is smaller than the first winding constraint radius; When the i+1th section of battery material portion meets the preset discarding condition, the i+1th section of battery material portion is wound with a third winding constraint radius, and the third winding constraint radius is greater than the second winding constraint radius.

13. The method according to any one of claims 1 to 3, characterized in that: The method of taking the number of winding turns as the winding reference and winding a portion of the battery material that meets the preset discarding condition in the process of preparing a wound core battery using the battery material comprises: In the process of preparing the wound core battery by using the battery material, in response to detecting that the m-th battery material portion meets the preset discarding condition, taking the winding number as the winding reference, winding the m-th battery material portion at a first winding speed; In response to detecting that the nth battery material portion does not meet the preset disposal condition, the nth battery material portion is wound at a second winding speed, the first winding speed is different from the second winding speed, and m and n are positive integers.

14. The method according to any one of claims 1 to 3, characterized in that: The step of obtaining the preset winding constraint radius used when the waste material is wound by the winding needle includes: In response to detecting that the j-th battery material portion is a secondary electrode material whose power conversion rate does not meet the preset conversion rate, obtaining a conversion rate difference between the power conversion rate and the preset conversion rate, where j is a positive integer; The winding constraint radius used when the waste material is wound by the winding needle is determined based on the conversion rate difference; wherein the conversion rate difference is in direct proportion to the winding constraint radius.

15. A winding device for battery materials, characterized in that: The device comprises: An acquisition module, used for acquiring a winding needle radius of a winding needle used for winding battery materials; The acquisition module is further used to acquire the thickness of the waste material and to acquire the preset winding constraint radius used when the waste material is wound by the winding needle, wherein the thickness of the waste material is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the size constraint information of the finished waste material obtained by winding the battery material to be discarded; A determination module, configured to determine the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the discarded material and the winding constraint radius; The winding module is used to wind the portion of the battery material that meets the preset discarding conditions during the process of preparing a core-wound battery using the battery material, taking the number of winding turns as the winding basis.

16. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the battery material winding method as described in any one of claims 1 to 14.

17. A computer-readable storage medium, characterized in that: The storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the battery material winding method as described in any one of claims 1 to 14.

18. A computer program product, characterized in that It comprises computer instructions, which, when executed by a processor, implement the winding method of the battery material as described in any one of claims 1 to 14.

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