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

Abstract

The application discloses a winding method, device, equipment, medium and product of a battery material, and relates to the field of battery preparation. The method comprises the following steps: obtaining the winding needle radius of a winding needle used for winding the battery material; obtaining the thickness of the waste material, and obtaining the pre-set winding constraint radius adopted when winding the waste material by the winding needle; determining the winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the waste material and the winding constraint radius; and taking the winding turns as the winding reference to wind the part of the battery material meeting the preset discarding condition in the process of preparing a winding core battery by the battery material. The above method can quantitatively determine the winding turns as the constraint information in the winding process of the battery material, facilitate the reasonable winding process of the battery material meeting the preset discarding condition and needing to be discarded by the winding turns, and guarantee the winding utilization rate of the material. The application can be applied to the preparation scene of the winding core battery.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing, and in particular to a method, apparatus, equipment, medium, and product for winding battery materials. Background Technology

[0002] Batteries, as energy storage devices, play a vital role in modern life. Roll-type batteries are battery structures in which battery materials such as positive electrode plates, negative electrode plates, and battery separators are wound into a cylindrical or similar shape. They are widely used in smartphones, power tools, laptops, and electric vehicles.

[0003] In related technologies, battery materials are typically wound using a needle to obtain larger finished products. To avoid the presence of joints during the winding of the battery separator, or defects in the positive and / or negative electrode sheets in the wound core battery, multiple finished products can be scanned to screen for finished products with joints or defects, thus achieving a screening process for finished products.

[0004] However, the above winding process usually results in a large finished material, which means that the selected battery cores with defects or faulty sections are also large. As a result, a lot of battery material is discarded, leading to a significant waste of material. Summary of the Invention

[0005] This application provides a method, apparatus, device, medium, and product for winding battery materials. It can quantitatively determine the number of winding turns as constraint information during the battery material winding process. This facilitates the reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding of battery materials to obtain a wound battery core. This helps avoid excessive waste of normal battery materials that need to be jointly wound, ensuring the utilization rate of the materials. The technical solution is as follows.

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

[0007] Obtain the radius of the winding needle used for winding battery material;

[0008] The thickness of the waste material is obtained, and the pre-set winding constraint radius used when winding the waste material through the winding needle is obtained. 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 waste material product obtained by winding the battery material to be discarded.

[0009] The number of turns of the battery material to be discarded is determined based on the coil radius, the thickness of the waste material, and the winding constraint radius.

[0010] Using the number of winding turns as a winding reference, the portion of the battery material that meets the preset waste conditions is wound during the process of preparing a wound battery from the battery material.

[0011] On the other hand, a winding device for battery material is provided, the device comprising:

[0012] The acquisition module is used to acquire the radius of the winding needle used for winding battery material;

[0013] The acquisition module is also used to acquire the thickness of the waste material and to acquire the pre-set winding constraint radius used when winding the waste material through the winding needle. 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] The determining module is used to determine the number of turns of the battery material to be discarded based on the winding needle radius, the thickness of the waste material, and the winding constraint radius;

[0015] A winding module is used to wind the portion of the battery material that meets the preset waste conditions during the process of preparing a wound battery from the battery material, using the number of winding turns as a winding reference.

[0016] On the other hand, a computer device is provided, the computer device including a processor and a memory, the memory storing at least one instruction, at least one program, code set or instruction set, the at least one instruction, the at least one program, the code set or instruction set being loaded and executed by the processor to implement the winding method of battery material as described in any of the embodiments of this application above.

[0017] On the other hand, a computer-readable storage medium is provided, wherein at least one instruction, at least one program, code set, or instruction set is stored therein, wherein 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 the winding method of battery material as described in any of the embodiments of this application above.

[0018] On the other hand, a computer program product or computer program is provided, 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 executes the computer instructions, causing the computer device to perform the winding method for the battery material described in any of the above embodiments.

[0019] The beneficial effects of the technical solutions provided in this application include at least the following:

[0020] For discarded battery materials, the number of winding turns is analyzed based on the thickness of the discarded material, the winding constraint radius used when winding the discarded material with a winding needle, and the radius of the winding needle. This allows for the selection of battery materials to be discarded during the manufacturing process, using the number of winding turns as a benchmark to wind materials that meet preset discarding conditions. By quantifying the number of winding turns as constraint information during the winding process, the number of winding turns facilitates the execution of a reasonable winding process for battery materials that meet preset discarding conditions during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product that meets the winding constraint radius, it may also be necessary to wind some normal battery materials that do not meet the preset discarding conditions. The constraint of the number of winding turns helps avoid excessive waste of normal battery materials that need to be wound together, ensuring material utilization. This quantitative process provides more objective information for the manufacturing process of wound batteries, improving production efficiency and execution. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural block diagram of a winding system provided in an exemplary embodiment of this application;

[0023] Figure 2 This is a flowchart of a method for winding battery materials according to an exemplary embodiment of this application;

[0024] Figure 3 This is a flowchart of a method for winding battery materials provided in another exemplary embodiment of this application;

[0025] Figure 4 This is a flowchart of a method for winding battery materials provided in another exemplary embodiment of this application;

[0026] Figure 5 This is a schematic diagram of a transport gripper provided in an exemplary embodiment of this application;

[0027] Figure 6 This is a schematic cross-sectional view of a finished sample product obtained based on the Archimedes curve, provided in an exemplary embodiment of this application.

[0028] Figure 7This is a flowchart of a method for winding battery materials according to yet another exemplary embodiment of this application;

[0029] Figure 8 This is a structural block diagram of a battery material winding device provided in an exemplary embodiment of this application;

[0030] Figure 9 This is a structural block diagram of a terminal provided in an exemplary embodiment of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0032] First, a brief introduction to the terms used in the embodiments of this application will be given.

[0033] Cylindrical cells: Most cylindrical cells (such as 18650 and 21700) are wound-cell batteries, widely used especially in portable electronic devices and electric vehicles. The design of a cylindrical cell typically includes a cylindrical metal casing containing key components such as the positive electrode material, negative electrode material, separator, and electrolyte. Due to their standardized dimensions and reliable performance, cylindrical cells are widely used in various electronic products, such as laptops, digital cameras, portable tools, and increasingly in electric vehicles and large-scale energy storage systems.

[0034] Positive electrode material: During battery discharge, the positive electrode material provides lithium ions (or other charge carriers), which move to the negative electrode material through the electrolyte. During charging, lithium ions return from the negative electrode material to the positive electrode material. Positive electrode materials typically have high redox potentials, meaning 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), and nickel cobalt aluminum oxide (NCA).

[0035] Negative electrode materials: During battery discharge, the negative electrode material receives lithium ions from the positive electrode material and releases them back to the positive electrode material during charging. Negative electrode materials need high lithium storage capacity and good conductivity. They typically have low redox potentials, which allows them to easily insert and extract lithium ions. Common negative electrode materials in lithium-ion batteries include graphite (such as artificial graphite and natural graphite), carbon-based materials, silicon-based materials, tin-based materials, and lithium titanate (Li4Ti5O12).

[0036] Battery separator: The battery separator is one of the key components of a lithium-ion battery. Located between the positive and negative electrodes, its main function is to prevent physical contact between them, thus avoiding short circuits, while allowing lithium ions to pass through and be stably conducted to complete the battery's charge-discharge cycles. Battery separators are typically functional membrane materials with a microporous structure, and their performance directly determines the overall performance of the battery. Common materials for battery separators 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 thermal stability and safety by coating inorganic ceramic particles (such as alumina) onto a polyolefin-based membrane. New separator materials are also under continuous development, including fluoropolymers, cellulose, polyimide (PI), and polyester (PET).

[0037] In related technologies, battery materials are typically wound using a needle winding machine to obtain larger finished product materials. To avoid defects such as contact strips during the separator winding process or flawed positive and / or negative electrode plates in the wound battery core, multiple finished product materials can be scanned to screen for those with contact strips or defects, thus achieving a material screening process. However, the aforementioned winding process usually directly produces larger finished product materials, resulting in larger wound batteries with contact strips or defects being screened out. Consequently, a significant amount of battery material is discarded, leading to substantial material waste.

[0038] This application provides a method for winding battery materials, which can quantitatively determine the number of winding turns as constraint information during the winding process. This facilitates the reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding of battery materials to obtain battery cells. This helps avoid excessive waste of normal battery materials that need to be wound together, ensuring the utilization rate of materials. The battery material winding method proposed in this application can be applied to various battery manufacturing scenarios, such as battery cell manufacturing, electric vehicle component production, and energy storage system construction, and is not limited here.

[0039] It should be noted that all 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 have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant regions. For example, the information such as the coil radius, waste material thickness, and winding constraint radius involved in this application was obtained with full authorization.

[0040] Secondly, the winding system involved in the embodiments of this application will be described. The battery material winding method provided in the embodiments of this application can be implemented by the terminal alone, or it can be implemented by the terminal and the server through data interaction (such as the server being responsible for processing the data sent by the terminal). The embodiments of this application do not limit this. Optionally, the battery material winding method implemented by the terminal alone will be described as an example.

[0041] This is illustrative; please refer to it. Figure 1 Terminal 110 in the winding system obtains the radius of the winding needle used for winding battery material.

[0042] Illustratively, a winding needle is a component used to wind materials into a cylindrical shape, such as battery cores or waste materials; the winding needle radius is the radius of the winding needle, which is usually a pre-set component, and the winding needle radius is usually information input to 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 obtains the pre-set winding constraint radius used when winding the waste material through the winding needle.

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

[0045] Among them, 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 dimensional constraint information of the waste material product obtained by winding the battery material to be discarded.

[0046] In illustrative terms, the thickness of the waste material refers to 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 grippers used to clamp the finished material after it has been manufactured, that is, the minimum radius at which the finished material is successfully clamped is used as the winding constraint radius, so that the finished material obtained by winding is also the minimum radius, etc.

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

[0048] To illustrate, after obtaining the coiling needle radius, waste material thickness, and winding constraint radius, the terminal analyzes the finished cross-section of the wound material and determines the number of winding turns by comprehensively considering the coiling needle radius, waste material thickness, and 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.

[0049] In some embodiments, the terminal 110 uses the number of winding turns as a winding reference to wind the portion of the battery material that meets the preset waste conditions during the process of preparing a wound battery from the battery material.

[0050] In a schematic manner, during the process of preparing a wound battery from battery materials, the number of winding turns obtained from the analysis is used as the winding benchmark to selectively 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 perform the winding process of battery materials. When the terminal 110 needs to wind the battery materials to be discarded, it sends a control command to the winding device 111. The control command includes the number of winding turns. The control command is used to instruct the winding device to perform the winding process on the waste materials that meet the preset waste 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 aforementioned terminals include, but are not limited to, mobile terminals such as mobile phones, tablets, portable laptops, smart voice interaction devices, and smart home appliances, and can also be desktop computers, etc.; the aforementioned servers can be independent physical servers, server clusters or distributed systems composed of multiple physical servers, or cloud servers.

[0053] Based on the above-mentioned terminology and application scenarios, the winding method for battery materials provided in this application will be described, taking the application of this method to a server as an example. Figure 2 As shown, the method includes the following steps 210 to 240.

[0054] Step 210: Obtain the radius of the winding needle used for winding the battery material.

[0055] In illustrative terms, battery materials are materials used to wind up batteries to obtain core batteries. Battery materials include positive electrode sheets, negative electrode sheets, battery separators, etc.

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

[0057] Coiling needles are typically metal needles with a specific shape, which may be straight or curved. They are usually made of metal or high-strength materials to ensure they can withstand greater pressure and friction during the winding process. Therefore, the coil corresponds to the coil needle radius, which is the radius of curvature of the coil needle, i.e., the distance from the central axis of the coil needle to the battery winding surface. The coil needle radius usually affects the tightness of the battery material winding during the winding process. For example, with a smaller coil needle radius, the battery material has a greater degree of curvature during winding, so the battery material will bear greater stress, resulting in a tighter winding. With a larger coil needle radius, the battery material has a smaller degree of curvature during winding, so the battery material will bear less stress, resulting in a less tight winding, and so on.

[0058] Once the winding needle is selected to wind the battery material, the radius of the winding needle is determined accordingly. For example, when winding an 18650 cell (18mm in diameter, 65mm in length), the radius of the winding needle used is usually between 3mm and 5mm, such as 3mm or 4.5mm; or, when winding a 21700 cell (21mm in diameter, 70mm in length), the radius of the winding needle used is usually between 5mm and 7mm, etc., without limitation here.

[0059] In some embodiments, a winding device is used to wind battery material around a winding needle as the winding center to realize the winding process for preparing a wound battery.

[0060] Optionally, the winding process of the winding equipment is controlled by a control terminal. The control terminal sends control commands to the winding equipment so that the control equipment can ensure the smooth feeding of battery materials, appropriate tension control, and winding speed based on the control commands, thereby achieving high-quality manufacturing of the wound battery.

[0061] Alternatively, the winding equipment itself may have a control component, and the winding equipment itself may achieve precise control through the control component. In this case, the winding equipment itself can be regarded as a terminal, without any limitation.

[0062] Step 220: Obtain the thickness of the waste material and the pre-set winding constraint radius used when winding the waste material with a winding needle.

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

[0064] Indicatively, during the process of winding battery materials to obtain a wound battery, there may be some battery materials that need to be discarded. For example, if there are some defective battery materials, in order to avoid the wound battery materials causing defects in the finished wound battery, these defective battery materials need to be discarded.

[0065] Optionally, the winding condition of the battery material can be detected using a winding device or additional sensing devices. Illustratively, the winding device itself has sensing components. Before winding a section of battery material, the winding device uses these sensing components to detect whether the battery material to be wound is qualified, i.e., whether the battery material to be wound needs to be discarded. If the battery material to be wound is detected as unqualified (e.g., poorly manufactured), then the battery material to be wound is determined as discardable, and the thickness of the discarded material is determined based on this.

[0066] Among them, the winding constraint radius is the dimensional constraint information of the waste material product obtained by winding the battery material to be discarded.

[0067] In illustrative terms, battery materials are wound to obtain finished products, such as wound batteries obtained by winding normal battery materials, and finished waste materials obtained by winding discarded battery materials. During the process of winding battery materials to obtain finished products, a certain winding constraint size needs to be preset to avoid the battery materials being wound continuously and resulting in an excessively large finished product.

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

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

[0070] In a schematic diagram, after the battery material is wound into a finished product using a winding machine, a transport gripper separates the finished product from the fixed winding needle. The transport gripper achieves this separation by clamping the finished product from the winding needle. The angle of the transport gripper determines the size of the finished product (e.g., the radius) that it can grip. When the angle of the transport gripper increases, the contact area between the gripper and the finished product expands outwards. This means the angle at which the gripper needs to hold the finished product increases, thus increasing the distance between the finished product and the center of the gripper. However, at the same time, the relative position of the contact point changes, causing the minimum radius from the surface of the object to the center of the gripper to decrease. In other words, as the gripper angle increases, the distance between the contact point and the center of the gripper shortens, resulting in a decrease in the minimum radius. Therefore, a larger gripper angle allows for a smaller finished product, and a smaller gripper angle allows for a larger finished product.

[0071] Optionally, the radius of the finished material that the transport gripper can grasp is determined based on a preset gripper angle, and the radius of the finished material is used as the winding constraint radius. Illustratively, the minimum radius of the finished material that the transport gripper can grasp is determined based on a preset maximum gripper angle, and the minimum radius is used as the winding constraint radius.

[0072] To illustrate, the maximum angle of the transport gripper is usually 120 degrees. If the maximum angle of the transport gripper is increased to 135 degrees, the radius of the finished material that the transport gripper can grasp at 135 degrees is the smallest (i.e., the minimum radius). This minimum radius is then used as the winding constraint radius so that the finished material can be successfully transported by the transport gripper while winding to obtain the smallest finished material.

[0073] In some embodiments, the thickness of the waste material is flexibly determined based on the battery material to be discarded. Typically, the thickness of the waste material varies depending on the battery material to be discarded. 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. This is not limited here.

[0074] In some embodiments, the winding constraint radius is pre-defined information, such as the minimum radius of the handling gripper used to handle finished materials at its maximum angle, which is then used as the winding constraint radius for subsequent analysis.

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

[0076] In a schematic way, by combining the radius of the winding needle used for winding battery materials, the thickness of the waste battery material to be discarded (also referred to as waste material), and the pre-set winding constraint radius that can successfully transport the finished material, the number of turns required to wind the waste material under the winding constraint radius is analyzed, that is, the number of turns is obtained.

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

[0078] Optionally, the sample finished product corresponds to the battery material to be discarded, and also corresponds to the thickness of the discarded battery material. For example: if the first detected battery material to be discarded is battery material A, battery material A is wound onto a winding needle based on the winding constraint radius, and the resulting material finished product a is used as the sample finished product. This material finished product a corresponds to battery material A, and also corresponds to the thickness d1 of the discarded battery material A.

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

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

[0081] Step 240: Using the number of winding turns as the winding reference, the portion of the battery material that meets the preset waste conditions is wound up during the process of preparing the wound battery from the battery material.

[0082] Indicatively, after calculating and determining the number of winding turns, the number of winding turns is used as the winding reference for the winding process when the battery material to be discarded is detected. That is, when the battery material to be discarded is detected, the winding process 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 waste conditions are detected during the process of preparing the core battery from the battery materials, then the battery materials need to be discarded by winding. During the winding waste process, if the battery materials that meet the preset waste conditions are the same as the waste materials corresponding to the sample finished product, then a targeted winding process can be performed on the battery materials that meet the preset waste conditions based on the number of winding turns corresponding to the sample finished product.

[0084] For illustration, the sample finished product is material finished product a, and the waste material corresponding to material finished product a is battery material A. If the battery material that meets the preset waste conditions during the winding process 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 to perform winding on the battery material that meets the preset waste conditions. That is, 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 wound battery from battery materials, it is detected in real time whether the battery materials meet the preset waste conditions. If they do, the portion of the battery materials that meet the preset waste conditions is wound around based on the number of winding turns. If they do not meet the conditions, the winding process of the battery materials can continue in a normal manner.

[0086] The preset waste conditions are pre-defined conditions for discarding battery materials. Optionally, the preset waste conditions include the presence of secondary electrode materials, such as poorly manufactured positive and / or negative electrode materials, in which case the secondary electrode materials need to be discarded; or, the preset waste conditions include separator roll switching conditions, such as battery separators being provided by separator rolls, and if the current separator roll is used up, the next separator roll needs to be switched to. The next separator roll and the current separator roll need to be connected by connecting tape, and the connection point is called the joint section. Because of the connecting tape, the joint section cannot play a normal role in the isolation of the battery separator, so the joint section with the connecting tape needs to be discarded.

[0087] In some embodiments, during the process of winding battery materials to prepare wound batteries, most of the battery materials do not meet the preset waste conditions, but some battery materials may meet the preset waste conditions. The number of winding turns is used as the winding information to constrain the battery materials that meet the preset waste conditions. This allows for the removal of all the finished materials obtained by winding through the transport grippers, while also removing the finished waste materials that meet the number of winding turns and have the smallest possible finished product size. The qualified finished materials that are removed are then retained.

[0088] The above process quantifies and determines the number of winding turns, which helps to determine a smaller number of winding turns through the winding constraint radius. This allows for the winding of battery materials that meet the preset waste conditions during the winding process to achieve targeted waste. In addition, when ensuring that the finished winding material can be picked up by the handling grippers based on the number of winding turns, not only may some battery materials that meet the preset waste conditions be wound, but also a small portion of battery materials that do not meet the preset waste conditions may be wound based on the number of winding turns. This small portion of battery materials is adjacent to the portion that meets the preset waste conditions. Determining the number of winding turns also helps to reduce the amount of waste of the small portion of battery materials that do not meet the preset waste conditions, thereby minimizing the waste of battery materials on large-scale production lines 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 the embodiments of this application are not limited thereto.

[0090] In summary, by using the winding needle radius, waste material thickness, and winding constraint radius, the number of winding turns, serving as constraint information during the winding process of battery materials, is quantitatively determined. This facilitates the execution of a reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product 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 wound together, ensuring the utilization rate of materials. This quantitative process provides more objective information for the preparation process of wound batteries cores, improving production efficiency and execution.

[0091] In an optional embodiment, the waste material thickness is implemented as the tape thickness indicating the thickness of the connecting tape during diaphragm roll switching, or the waste material thickness is implemented as the electrode thickness of the secondary electrode material when secondary electrode material is present. (Illustrative, such as...) Figure 3 As shown above, Figure 2 Step 220 shown can also be implemented as step 310 or step 320.

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

[0093] Indicatively, battery materials used in the process of winding to prepare finished materials typically include positive electrode sheets, negative electrode sheets, and battery separators; for example, battery materials are wound in the manner of "positive electrode sheet - battery separator - negative electrode sheet - battery separator - positive electrode sheet..."; or, battery materials are wound in the manner of "positive electrode sheet - battery separator - positive electrode sheet..." or "negative electrode sheet - battery separator - negative electrode sheet..." etc.

[0094] Among them, the battery separator, as a battery material that isolates the electrode material, plays a role in ensuring the safety of finished product manufacturing and use. The battery separator can be provided through separator rolls, and the length of each separator roll is usually quite long, such as 50 meters to 500 meters. In addition, the width of the separator roll, i.e. the separator width, is approximately between 100 mm and 600 mm. Common battery separator widths are 160 mm, 210 mm, 300 mm, etc., which are not limited here.

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

[0096] To illustrate, when the first diaphragm roll is used up, if the positive electrode material and / or negative electrode material has not yet been wound up, 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] The first and second diaphragm rolls are typically connected by adhesive tape. Commonly used adhesive tapes are usually made of high-performance double-sided tape or special tapes, such as: double-sided tapes made of polypropylene (PP) film tape with a specially designed adhesive coating on the surface; or polyethylene terephthalate (PET) film tape; or polyvinyl chloride (PVC) tape, etc., without limitation.

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

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

[0100] The waste battery materials include a connecting strip that connects the first diaphragm roll and the second diaphragm roll via a connecting tape.

[0101] In a schematic manner, during the process of connecting the first diaphragm roll and the second diaphragm roll with connecting tape, the portions of the first diaphragm roll with the connecting tape and the portions of the second diaphragm roll with the connecting tape are referred to as the tape-connecting section. The tape-connecting section 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] In particular, because there is connecting tape at the junction, the battery separator cannot properly perform its isolation function, so the battery separator at the junction needs to be discarded.

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

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

[0105] In illustrative terms, secondary electrode materials refer to defective electrode materials that are deemed to be substandard during the production of wound batteries. Secondary electrode materials have defects in appearance, performance, or other quality standards, and therefore cannot be used as effective electrode materials for the final winding into wound batteries.

[0106] Among them, the electrode material is the core battery material that participates in energy conversion in the rolled battery. The energy conversion rate of the secondary electrode material does not meet the preset conversion rate, that is, the energy conversion efficiency (or charge and discharge performance) of the secondary electrode material during use cannot reach the design or predetermined performance standard.

[0107] The electrode material includes at least one of a positive electrode and a negative electrode. Therefore, the secondary electrode material may be realized as a secondary positive electrode, i.e., a defective positive electrode, or it may be realized as a secondary negative electrode, i.e., a defective negative electrode, or it may include both secondary positive and secondary negative electrodes, without limitation here.

[0108] Indicatively, during the winding of battery materials, there are usually long positive and / or negative electrode sheets, as well as a battery separator, which is used to isolate the battery electrode sheets. Some of the electrode materials may be secondary electrode materials, such as: in a 10-meter positive electrode sheet, the electrode sheet from the 5.35-meter to the 5.38-meter section is a secondary electrode material, etc., which is not limited here.

[0109] Optionally, after determining the secondary electrode material, the electrode thickness corresponding to the secondary electrode material is used as the thickness of the waste material for subsequent analysis.

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

[0111] Indicatively, when secondary materials are identified, the battery materials to be discarded include not only secondary electrode materials but also battery separators used to separate the secondary electrode materials. The length of the battery separator used to separate the secondary electrode materials is usually the same as or similar to the length of the secondary electrode materials. The discarded secondary electrode materials are wrapped with the battery separator to avoid problems caused by improper handling of the secondary electrode materials.

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

[0113] In summary, by using the winding needle radius, waste material thickness, and winding constraint radius, the number of winding turns, serving as constraint information during the winding process of battery materials, is quantitatively determined. This facilitates the execution of a reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product 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 wound together, ensuring the utilization rate of materials. This quantitative process provides more objective information for the preparation process of wound batteries cores, improving production efficiency and 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. The number of winding turns is then determined by combining the winding space information and the thickness of the waste material; different thicknesses of the waste material will also affect the determination of the number of winding turns. (Illustrative example, such as...) Figure 4 As shown above, Figure 2 Step 230 shown can also be implemented as steps 410 to 440.

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

[0116] For illustrative purposes, the winding constraint radius is a preset value. The winding constraint radius is determined by the included angle of the handling jaws used to handle the finished material product obtained by winding. For example, the winding constraint radius is the minimum radius of the handling jaws used to handle the finished material product obtained by winding at the maximum included angle.

[0117] like Figure 5 The diagram shown is a schematic of a handling gripper. It illustrates a minimum radius of 510, which is a preset value used by the handling gripper when gripping finished materials.

[0118] Optionally, during the winding of battery materials, the number of winding turns is analyzed by acquiring information such as the winding constraint radius and the winding needle radius, so as to determine the winding process used when detecting battery materials to be discarded by controlling the number of winding turns.

[0119] Optionally, during the winding of 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 constraint of the winding constraint radius to obtain a sample finished product. Then, based on the cross-sectional analysis of the sample finished product, the relationship between the information obtained from the cross-section such as the winding constraint radius and the winding needle radius can be analyzed.

[0120] Taking the analysis of the finished product cross-section of a sample product to determine the number of winding turns as an example, such as... Figure 6 The image shows a schematic diagram of the finished product cross-section. The finished product cross-section is in the form of an Archimedean spiral, showing a winding constraint radius of 610, which is the minimum radius R of the handling gripper; it also shows a needle radius of 620, which is the radius of the needle.

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

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

[0123] In an optional embodiment, the number of turns of the battery material to be discarded is determined by analyzing the winding space information and the thickness of the waste material.

[0124] Indicatively, the thickness of the waste material is related to the wound battery material to be discarded. If we analyze the cross-section of the finished sample, 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 thickness of the waste material to obtain the number of winding turns can be implemented as follows: steps 420 to 440.

[0126] Step 420: Obtain the thickness of the battery separator in the battery material.

[0127] To illustrate, battery materials include a battery separator, and the thickness of the battery separator is called the separator thickness.

[0128] In the process of winding up the battery materials to be discarded, whether the battery materials to be discarded are the connector section or the secondary electrode material, they all include the battery separator. For example, if the battery materials to be discarded are the connector section, the connector section includes two layers of battery separator and one layer of connecting tape. If the battery materials to be discarded are the secondary electrode material, the secondary electrode material also needs to be wound with the battery separator for disposal. That is, the battery materials to be discarded include the secondary electrode material and the battery separator.

[0129] When the battery materials to be discarded include secondary electrode materials and battery separators, considering that battery separators with junction sections do not have an effective function, the battery separators used for winding secondary electrode materials do not have junction sections.

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

[0131] The following is an illustrative introduction to determining the separator winding space information for different types of battery materials to be disposed of.

[0132] (1) The thickness of the waste material is the 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 connector section, the thickness of the discarded material is the thickness of the adhesive tape connecting the connector section; therefore, when analyzing the winding space information and the thickness of the discarded material, the winding space information and the adhesive tape thickness are analyzed in combination to obtain the separator winding space information.

[0134] In an optional embodiment, when the battery material to be discarded includes a connecting section that connects the first diaphragm roll and the 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.

[0135] In a schematic way, the winding space information is used as the minuend and the tape thickness is used as the subtrahend, so that the difference between the two is used as the diaphragm winding space information.

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

[0137] like Figure 6 As shown, there is a thickness of waste material, as represented by... Figure 6 b1 or b2 (b1 / b2); when the battery material to be discarded is the connector section, the thickness of the discarded material represents the thickness of the adhesive tape connecting the connector section; for example, when the thickness of the discarded material is b1, it represents the thickness of the adhesive tape, and when it is b2, it 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 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 tape thickness is used as the diaphragm winding space information.

[0139] The number of separator roll switching times is used to characterize the number of separator rolls switched. Illustratively, the separator length is the length of the battery separator in one separator roll. If the separator length is small, multiple separator rolls may be switched during the winding of 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, which is 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 tape thickness sum, which represents the sum of the tape thicknesses of the connecting tapes used when switching the separator rolls multiple times; thus, the difference between the winding space information and the tape thickness sum is taken as the separator winding space information.

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

[0142] (2) The thickness of the waste material is the electrode thickness 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 analyzed in combination to obtain the separator winding space information.

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

[0145] Indicatively, the waste material being analyzed can be the sample product described above. That is, when the sample product is obtained, the number of turns of the electrode during the winding process is analyzed based on the cross-section (i.e., cross-sectional dimension) of the sample product.

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

[0147] Indicatively, during the winding process of battery materials, including secondary electrode materials and battery separators, the electrode materials in the battery materials may be entirely secondary electrode materials, or partially secondary electrode materials and partially normal electrode materials. Therefore, when counting the number of electrode winding turns, when all electrode materials are secondary electrode materials, the count is the number of turns of secondary electrode materials; when the electrode materials are partially secondary electrode materials and partially normal electrode materials, the count is the total number of turns of both secondary and normal electrode materials.

[0148] In some embodiments, the number of electrode turns and the number of separator turns may not be the same during the process of winding the electrode material through the battery separator to avoid safety hazards.

[0149] To illustrate, the width of a battery separator is typically greater than the width of the electrode material. However, this does not mean that a single-layer battery separator—or a single-layer electrode material—can perfectly wrap the electrode material during winding. This is because: the battery separator not only wraps the surface of the electrode material but also needs to cover both sides and ensure the overall sealing of the winding. Furthermore, when the width of the battery separator exceeds the width of the material, it will overlap during winding, requiring more turns to wrap the electrode material. Additionally, the battery separator material is relatively soft and may stretch or slightly extend, which also requires more turns to fully cover each turn of the electrode material. Therefore, the number of turns for the battery separator is usually more than the number of turns for the electrode material.

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

[0151] For illustrative purposes, the electrode thickness is the thickness of the wound electrode material, which may be secondary electrode material, a combination of secondary electrode material and normal electrode material; the product of the number of electrode turns and the electrode thickness is used as the electrode winding space information.

[0152] Schematic, electrode winding space information is used to characterize the space occupied by the wound electrode material during the process of winding battery material to obtain the finished material.

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

[0154] In a schematic way, the difference between the winding space information and the electrode winding space information is used as the minuend and the difference between the two as the separator winding space information. The separator winding space information represents the space available for winding the battery separator in the total winding space information, excluding the electrode winding space information.

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

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

[0157] To illustrate, considering that the above analysis is performed based on radius, we first obtain twice the value of the separator thickness, and then use the separator winding space information as the dividend and twice the value of the separator thickness as the divisor to obtain the quotient of the two. This quotient represents the number of separator windings in the battery material to be discarded. The number of separator windings is used as the number of windings to constrain the amount of battery separator used in the winding process.

[0158] In other words, the number of winding turns is used to constrain the use of the battery separator during the winding of battery materials to be discarded.

[0159] In some embodiments, when the battery material to be discarded is connected to the first and second separator rolls by a connecting tape, the thickness of the discarded material is the thickness of the connecting tape between the first and second separator rolls. At this time, the battery separator with the connecting tape is usually not effective, so the battery separator with the connecting tape can be wound separately for discarding. This process can be called the separator separate winding process. The number of winding turns of the battery separator in the separator separate winding process is shown in Formula 1 below.

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

[0161] Where R is the roll diameter constraint radius; r is the roll needle radius; and b1 is the tape thickness.

[0162] Considering that the length of the battery separator in a single separator roll is usually quite long, when switching separator rolls to wind the junction section, the finished material usually includes only one junction section based on the winding constraint radius. Therefore, (Rr) can be reduced by one b1. If there are multiple junction sections (such as multiple junction sections in the sample finished product, or multiple junction sections are predicted to exist), then (Rr) can be reduced by multiple b1 (the same as the number of junction sections) when calculating the number of winding turns. This is not limited here.

[0163] In some embodiments, when the battery material to be discarded is a secondary electrode material and a battery separator for discarding the secondary electrode material, the thickness of the discarded material is the thickness of the wound electrode including the secondary electrode material. In this case, the secondary electrode material needs to be wound around the battery separator, which has an effective function (such as effectively isolating the electrode material), for disposal. Therefore, the battery separator and the secondary electrode material are wound together for disposal. This process can be called the electrode winding process. The number of turns of the battery separator during the electrode winding process is shown in Formula 2 below.

[0164] Formula 2: Number of winding turns (n2) = (Rr - b2 * Number of electrode winding turns) / (2 * Separator thickness).

[0165] Where R is the coil diameter constraint radius; r is the coil needle radius; and b2 is the electrode thickness.

[0166] Among them, the number of electrode winding turns is the number of turns of the electrode material including secondary electrode material in the sample finished product. The electrode material in the battery material may be all secondary electrode material, or it may be partly secondary electrode material and partly normal electrode material.

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

[0168] In summary, by using the winding needle radius, waste material thickness, and winding constraint radius, the number of winding turns, serving as constraint information during the winding process of battery materials, is quantitatively determined. This facilitates the execution of a reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product 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 wound together, ensuring the utilization rate of materials. This quantitative process provides more objective information for the preparation process of wound batteries cores, improving production efficiency and execution.

[0169] In this embodiment, the number of winding turns determined by the above method is the number of separator winding turns obtained from the analysis of the finished waste material (such as the sample finished product obtained from the first detection of defective winding). Through accurate analysis of the number of separator winding turns, it is helpful to pre-determine the consumption of battery separator by using the number of winding turns in the process of having battery materials that need to be wound for waste in the future. That is, the number of turns required for the battery separator to be wound is determined by theoretical calculation, avoiding the problem of excessive consumption of battery separator due to lack of quantitative confirmation. Considering that whether it is the waste of secondary electrode material or the waste of docking strip, the wound battery material includes battery separator, this process can effectively reduce the waste of battery separator winding and improve the utilization rate of battery separator.

[0170] In an optional embodiment, the winding length is determined by the number of winding turns. Thus, during the process of preparing a wound battery by winding battery materials, the portion of battery material meeting preset waste conditions is wound based on the number of winding turns to obtain the finished waste material that needs to be discarded. (Illustrative example, such as...) Figure 7 As shown above, Figure 2 Step 240 shown can also be implemented as step 710.

[0171] Step 710: In the process of preparing a wound battery using battery materials, when the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around with a winding needle based on the number of winding turns to obtain the waste material finished product of the waste finished product quantity.

[0172] Where i is a positive integer;

[0173] Optionally, taking the process of winding battery materials on a production line to prepare a wound battery as an example, the battery materials to be wound on the production line are usually quite long. The i-th segment of battery material is any segment of battery material. The battery material segment is usually not a fixed division, but refers to any selected part of a whole piece of battery material. If the i-th segment of battery material meets the preset discard conditions, it needs to be wound to discard the i-th segment of battery material.

[0174] Indicatively, pre-set disposal conditions include the presence of secondary electrode materials, such as poorly manufactured positive and / or negative electrode materials, in which case the secondary electrode materials need to be discarded; or, pre-set disposal conditions include separator roll switching conditions, such as battery separators being supplied via separator rolls, and if the current separator roll is used up, the next separator roll needs to be switched to. The next separator roll and the current separator roll need to be connected by connecting tape, and the connection point is called the joint section. Because of the connecting tape, the joint section cannot perform the normal isolation function of the battery separator, so the joint section with connecting tape needs to be discarded.

[0175] The i-th segment of battery material corresponds to the material length, which represents the length of the i-th segment of battery material. For example, if the material length is 59.6mm, it means that there is a 59.6mm i-th segment of battery material in the battery material to be wound that meets the preset discard conditions, so the 59.6mm battery material segment needs to be discarded.

[0176] In an optional embodiment, when the i-th segment of battery material meets the separator roll switching conditions, the i-th segment of battery material, including the connecting strip segment, is wound around by a winding needle with the number of winding turns as the winding reference to obtain the first number of waste finished products.

[0177] Schematic, the separator roll switching condition represents the switching of the current separator roll (first separator roll) used to provide the battery separator to a new separator roll (second separator roll). At this time, the i-th segment of battery material that meets the separator roll switching condition can be understood as having a connecting strip segment in the first separator roll and the second separator roll connected by a connecting tape. The connecting strip segment is the connection part between the first separator roll and the second separator roll indicated by the separator roll switching condition. The connecting strip segment corresponds to the connecting strip segment length. The first waste product quantity is determined based on a first quotient between the winding length and the connecting strip segment length.

[0178] For illustrative purposes, the winding length is the unfolded length of the finished material obtained from the winding.

[0179] Optionally, after obtaining the number of winding turns, the winding length can be obtained using the number of winding turns and the winding constraint radius.

[0180] To illustrate, the number of winding turns follows the Archimedes curve law. Given the number of winding turns and the winding constraint radius, the winding length after the number of winding turns is obtained by integration.

[0181] Optionally, if the winding length is determined based on the finished sample, the starting point and ending point of the winding of the battery material before the finished sample can be determined, and the difference between the ending point and the starting point can be used as the winding length. Here, the determination of the winding length is not limited.

[0182] At this point, the number of winding turns obtained by calculation is used as the winding reference, so as to wind the i-th segment of battery material through the winding needle. The material length corresponding to the i-th segment of battery material is the length of the connecting section between the first and second separator rolls indicated by the separator roll switching condition.

[0183] Indicatively, when battery materials that meet the preset waste conditions are realized as a connector segment, the material length is the connector segment length; the first quotient is determined by using the winding length as the dividend and the connector segment length as the divisor. If the first quotient is less than or equal to 1, the quantity of the first waste product is 1. If the first quotient is greater than 1, the value is taken upwards to determine the quantity of the first waste product.

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

[0185] The secondary electrode material is the electrode material indicated by the electrode waste conditions, and the second waste product quantity is determined based on a second quotient between the winding length and the secondary electrode length.

[0186] Schematic, electrode rejection conditions represent defective electrode materials (such as positive electrode and negative electrode) (unusable). In this case, the i-th segment of battery material that meets the electrode rejection conditions can be understood as defective secondary electrode material, and the battery separator used to wind this secondary electrode material; at this time, the number of winding turns is calculated as the winding reference, so as to wind the i-th segment of battery material through the winding needle, and the material length corresponding to the i-th segment of battery material is the secondary electrode length of the secondary electrode material indicated by the electrode rejection conditions.

[0187] Indicatively, when battery materials that meet the preset waste conditions are realized as secondary electrode materials, the material length is the secondary electrode length corresponding to the secondary electrode material; the second quotient is determined by using 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 quantity of the second waste product is 1. If the second quotient is greater than 1, the value is taken up to determine the quantity of the second waste product.

[0188] In other words, the quantity 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 segment of battery material.

[0189] That is: when winding the i-th segment of battery material based on the number of winding turns, the winding equipment controls the winding of the i-th segment of battery material to the required number of winding turns, thus obtaining a finished waste material; then, if the i-th segment of battery material is not yet fully wound (i.e., the material length is greater than the winding length), the remaining unwound battery material in the i-th segment is wound to the required number of winding turns, thus obtaining another finished waste material; repeating the above process yields at least one finished waste material, so that at least one finished waste material can be successfully clamped out and scrapped by the handling grippers corresponding to the winding constraint radius.

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

[0191] In some embodiments, when winding the i-th segment of battery material, it is detected in real time whether the battery material no longer meets the preset discard conditions. If so, after the current winding material product is obtained, the winding process is no longer based on the number of winding turns. If not, after the current winding material product is obtained, the winding process continues to be based on the number of winding turns.

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

[0193] Among them, the battery material in the (i-1)th segment does not meet the preset disposal conditions.

[0194] In illustratively, during the process of preparing a wound battery by winding battery material using a winding device, the first i-1 segments of battery material that do not meet the preset waste conditions can be wound around a preset first winding constraint radius to obtain at least one finished material product that does not need to be discarded in order to prepare at least one wound battery.

[0195] In an optional embodiment, when the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around using the second winding constraint radius.

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

[0197] Schematic illustration: If the winding equipment detects that the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around with a second winding preset radius. Optionally, the clamping angle of the transport grippers can be adjusted while keeping the transport grippers unchanged. The second winding constraint radius is the minimum radius at the maximum clamping angle, and the first winding constraint radius is the clamping radius at a smaller clamping angle (such as the maximum radius at the minimum clamping angle, or the radius at other clamping angles, etc.). If the i-th segment of battery material meets the preset waste conditions, while it is desirable to successfully transport and discard the waste material product obtained by winding the i-th segment of battery material through the transport grippers, it is also desirable to have a smaller waste material product obtained by winding the i-th segment of battery material. Therefore, a second winding constraint radius smaller than the first winding constraint radius can be used to wind the i-th segment of battery material.

[0198] In an optional embodiment, when the (i+1)th segment of battery material meets the preset waste conditions, the (i+1)th segment of battery material is wound around using the third winding constraint radius.

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

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

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

[0202] In an optional embodiment, during the process of preparing a wound battery using battery materials, in response to detecting that the m-th battery material portion meets the preset discard conditions, the m-th battery material portion is wound at a first winding speed, with the number of winding turns as the winding reference; in response to detecting that the n-th battery material portion does not meet the preset discard conditions, the n-th battery material portion is wound at a second winding speed, wherein the first winding speed and the second winding speed are different, and m and n are positive integers.

[0203] Optionally, the m-th battery material part can be any battery material part. If it meets the preset discard conditions, the winding process for the m-th battery material part is performed at a relatively low first winding speed to avoid winding too fast and failing to wind the m-th battery material part accurately and perfectly. For the n-th battery material part that does not meet the preset discard conditions, the n-th battery material part is wound at a relatively fast second winding speed to ensure the winding efficiency of normal battery material parts.

[0204] Optionally, if the m-th battery material part meets the preset waste conditions, the winding process for the m-th battery material part can be performed at a larger first winding speed to avoid excessive time consumption for winding waste materials; for the n-th battery material part that does not meet the preset waste conditions, a smaller second winding speed can be used to wind the n-th battery material part to avoid the problem of winding the normal battery material part incorrectly, etc.

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

[0206] Indicatively, the fact that the energy conversion rate does not meet the preset conversion rate is an illustrative preset discard condition. Normally, if the energy conversion rate of the electrode material is less than the preset conversion rate, it is considered to have met the preset discard condition. In this case, the electrode material is a secondary electrode material. The secondary electrode material may be some of the electrode materials in the battery material, or it may be all of the electrode materials in the battery material. This is not limited here.

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

[0208] In an optional embodiment, the winding constraint radius used when winding waste material through a winding needle is determined based on the conversion rate difference; wherein the conversion rate difference is directly proportional to the winding constraint radius.

[0209] This is illustrative of how the conversion rate difference affects the winding constraint radius used when winding waste material. For example, the winding constraint radius corresponds to a radius range; the larger the conversion rate difference, the larger the radius selected from the radius range as the winding constraint radius; the smaller the conversion rate difference, the smaller the radius selected from the radius range as the winding constraint radius, etc., without any specific limitations here.

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

[0211] In summary, by using the winding needle radius, waste material thickness, and winding constraint radius, the number of winding turns, serving as constraint information during the winding process of battery materials, is quantitatively determined. This facilitates the execution of a reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product 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 wound together, ensuring the utilization rate of materials. This quantitative process provides more objective information for the preparation process of wound batteries cores, improving production efficiency and execution.

[0212] In this application embodiment, the content of the winding process constrained by the number of winding turns is introduced. By quantifying and determining the number of winding turns, it helps to guide the winding equipment to perform the winding process with a specific number of winding turns, avoiding the production of excessively large material products. This can effectively reduce the waste of battery materials, especially the battery separator. In addition, flexibly adjusting the winding constraint radius and / or winding speed can also make the winding process more flexible, improving winding accuracy and winding efficiency.

[0213] Figure 8This is a structural block diagram of a battery material winding apparatus provided in an exemplary embodiment of this application, and 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] The acquisition module 810 is used to acquire the radius of the winding needle used for winding battery material;

[0215] The acquisition module 810 is also used to acquire the thickness of the waste material and to acquire the pre-set winding constraint radius used when winding the waste material through the winding needle. 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 waste material product obtained by winding the battery material to be discarded.

[0216] The determining module 820 is used to determine the number of winding turns of the battery material to be discarded based on the winding needle radius, the thickness of the waste 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 waste conditions during the process of preparing a wound battery from the battery material, using the number of winding turns as the winding reference.

[0218] In an optional embodiment, the acquisition module 810 is further configured to acquire the thickness of the connecting tape used to connect the first diaphragm roll and the second diaphragm roll as the thickness of the waste material, wherein the first diaphragm roll and the second diaphragm roll are different diaphragm rolls used to provide battery separators in the battery material, and the battery material to be discarded includes a connecting tape segment that connects the first diaphragm roll and the second diaphragm roll via the connecting tape.

[0219] In an optional embodiment, the acquisition module 810 is further configured to acquire the electrode thickness corresponding to the secondary electrode material in the battery material as the thickness of the waste material, wherein the battery material to be discarded includes the secondary electrode material and a battery separator for discarding the secondary electrode material, and the 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 and a negative electrode.

[0220] In an optional embodiment, the determining module 820 is further configured 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 determining module 820 is further configured to obtain the separator thickness of the battery separator in the battery material; analyze 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; and obtain the number of separator winding turns corresponding to the battery separator in the battery material to be discarded as the number of winding turns by using the separator winding space information and the separator thickness.

[0222] In an optional embodiment, the determining module 820 is further configured to, when the battery material to be discarded includes a connecting section that connects the first separator roll and the second separator roll via a connecting tape, use the difference between the winding space information and the tape thickness as the separator winding space information; or, based on the winding constraint radius and the separator length of the separator roll, determine the number of separator roll switching operations, the number of separator roll switching operations being used to characterize the number of separator rolls to be switched; determine the tape thickness based on the number of separator roll switching operations and the tape thickness; and use the difference between the winding space information and the tape thickness as the separator winding space information.

[0223] In an optional embodiment, the determining module 820 is further configured to, when the battery material to be discarded includes secondary electrode material and a battery separator for discarding the secondary electrode material, obtain the number of electrode winding turns in the cross-sectional dimension of the finished waste material, wherein the number of electrode winding turns is used to characterize the number of turns of the secondary electrode material in the finished waste material obtained by winding the secondary electrode material and the battery separator; obtain electrode winding space information based on the number of electrode winding turns and the electrode thickness; and use the difference between the winding space information and the electrode winding space information as the separator winding space information.

[0224] In an optional embodiment, the determining 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 further configured to, during the process of preparing a wound battery from the battery material, when the i-th segment of battery material meets the preset waste conditions, use the number of winding turns as a winding reference and wind the i-th segment of battery material through the winding needle to obtain a quantity of waste finished products; wherein i is a positive integer, and the quantity of waste 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 segment of battery material.

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

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

[0228] In an optional embodiment, the winding module 830 is further configured to, during the process of winding the battery material to prepare the wound battery, use a first winding constraint radius to wind the first i-1 segment of battery material, the i-1 segment of battery material not meeting the preset discard conditions; when the i-1 segment of battery material meets the preset discard conditions, use a second winding constraint radius to wind the i-1 segment of battery material, the second winding constraint radius being smaller than the first winding constraint radius; when the i+1 segment of battery material meets the preset discard conditions, use a third winding constraint radius to wind the i+1 segment of battery material, the third winding constraint radius being larger than the second winding constraint radius.

[0229] In an optional embodiment, the winding module 830 is further configured to, during the process of preparing the wound battery from the battery material, in response to detecting that the m-th battery material portion meets the preset discard conditions, wind the m-th battery material portion at a first winding speed, using the number of winding turns as a winding reference; and in response to detecting that the n-th battery material portion does not meet the preset discard conditions, wind the n-th battery material portion at a second winding speed, wherein 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 further configured to, in response to detecting that the j-th battery material portion is a secondary electrode material whose energy conversion rate does not meet the preset conversion rate, acquire the conversion rate difference between the energy conversion rate and the preset conversion rate, where j is a positive integer; and determine the winding constraint radius used when winding the waste material through the winding needle based on the conversion rate difference; wherein the conversion rate difference is directly proportional to the winding constraint radius.

[0231] In summary, by using the winding needle radius, waste material thickness, and winding constraint radius, the number of winding turns, serving as constraint information during the winding process of battery materials, is quantitatively determined. This facilitates the execution of a reasonable winding process for battery materials that meet preset waste conditions and need to be discarded during the winding process to obtain a wound battery core. This improves the targeting of waste material winding. When winding discarded battery materials to obtain a finished product 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 wound together, ensuring the utilization rate of materials. This quantitative process provides more objective information for the preparation process of wound batteries cores, improving production efficiency and execution.

[0232] It should be noted that the battery material winding device provided in the above embodiments is only an example of the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the battery material winding device and the battery material winding method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0233] Figure 9 This illustration shows a structural block diagram of an electronic device 900 provided in an exemplary embodiment of this application. The electronic device 900 can be a portable mobile terminal, such as a smartphone, in-vehicle terminal, tablet computer, MP3 player (Moving Picture Experts Group Audio Layer III), MP4 player (Moving Picture Experts Group Audio Layer IV), laptop computer, or desktop computer. The electronic device 900 may also be referred to as a user device, portable terminal, laptop terminal, desktop terminal, or other names. The electronic device 900 can be used to control winding equipment, such as controlling the winding equipment to perform a corresponding winding process to wind battery material via a mobile terminal or desktop computer.

[0234] Typically, 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 or an 8-core processor. 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 high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 902 are used to store at least one instruction, which is executed by the processor 901 to implement the battery material winding method provided in the method embodiments of this application.

[0237] In some embodiments, the electronic device 900 further includes one or more sensors. These one or more sensors include, but are not limited to, proximity sensors, gyroscope sensors, and pressure sensors.

[0238] Embodiments of this application also provide a computer device, which can be implemented as a terminal or a server. The computer device includes a processor and a memory, the memory storing at least one instruction, at least one program, a code set, or an instruction set. The processor loads and executes the at least one instruction, at least one program, code set, or instruction set to implement the battery material winding method provided in the above-described method embodiments.

[0239] Embodiments of this application also provide a computer-readable storage medium storing at least one instruction, at least one program, code set, or instruction set, wherein 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-described method embodiments.

[0240] Embodiments of this application also provide a computer program product or computer program including 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 executes the computer instructions, causing the computer device to perform the winding method for the battery material described in any of the above embodiments.

[0241] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid-state drives (SSDs), or optical discs, etc. The random access memory may include resistive random access memory (ReRAM) and dynamic random access memory (DRAM). The sequence numbers of the embodiments in this application are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0242] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware, or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk. The above descriptions are merely optional embodiments of this application and are not intended to limit the application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for winding battery material, characterized in that, The method includes: Obtain the radius of the winding needle used for winding battery material; The waste material thickness is obtained, and a pre-set winding constraint radius is obtained when the waste material is wound through the winding needle. The waste material thickness is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the dimensional constraint information of the finished waste material obtained by winding the battery material to be discarded. The waste material thickness includes the tape thickness and the electrode thickness. The tape thickness is the thickness of the connecting tape connecting the first separator roll and the second separator roll. The first separator roll and the second separator roll are different separator rolls used to provide the battery separator in the battery material. The battery material to be discarded includes a connecting section that connects the first separator roll and the second separator roll through the connecting tape. The electrode thickness is the thickness corresponding to the secondary electrode material in the battery material. The battery material to be discarded includes the secondary electrode material and a battery separator for discarding the secondary electrode material. The energy conversion rate of the secondary electrode material does not meet the preset conversion rate. The electrode material includes at least one of a positive electrode and a negative electrode. The difference between the winding constraint radius and the winding needle radius is obtained to obtain the winding space information; Obtain the thickness of the battery separator in the battery material; By analyzing the winding space information and the thickness of the waste material, the membrane winding space information is obtained. The membrane winding space information is used to characterize the space occupied by the battery separator in the wound battery material. The quotient of the diaphragm winding space information and twice the diaphragm thickness is taken as the number of winding turns; Using the number of winding turns as a winding reference, the portion of the battery material that meets the preset waste conditions is wound during the process of preparing a wound battery from the battery material.

2. The method according to claim 1, characterized in that, The process of winding a wound battery using the number of winding turns as a winding reference, and winding the portion of the battery material that meets the preset waste conditions during the preparation of the wound battery from the battery material, includes: In the process of preparing a wound battery using the battery material, when the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around the winding needle using the number of winding turns as the winding reference to obtain the waste material finished product of the waste finished product quantity. Where i is a positive integer, and the quantity of waste 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 segment of battery material.

3. The method according to claim 2, characterized in that, When the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around by the winding needle using the number of winding turns as the winding reference, resulting in a quantity of waste finished products, including: When the i-th segment of battery material meets the separator roll switching conditions, the i-th segment of battery material, including the connecting strip segment, is wound around by the winding needle using the number of winding turns as the winding reference to obtain the first number of waste finished products. The connecting section is the connection part between the first diaphragm roll and the second diaphragm roll indicated by the diaphragm roll switching condition. The connecting section corresponds to the length of the connecting section. The first quantity of waste finished products is determined based on a first quotient between the winding length and the length of the connecting section.

4. The method according to claim 2, characterized in that, When the i-th segment of battery material meets the preset discard conditions, the i-th segment of battery material is wound around by the winding needle, using the number of winding turns as the winding reference. When the i-th segment of battery material meets the electrode waste conditions, the i-th segment of battery material, including the secondary electrode material, is wound around by the winding needle using the number of winding turns as the winding reference to obtain the second number of waste finished products; The secondary electrode material is the electrode material indicated by the electrode waste conditions, and the second quantity of waste finished products is determined based on a second quotient between the winding length and the secondary electrode length.

5. The method according to claim 2, characterized in that, In the process of preparing a wound battery using the battery material, when the i-th segment of battery material meets the preset discard conditions, the i-th segment of battery material is wound around using the winding number as a winding reference, including: During the process of winding the battery material to prepare the wound battery, the first i-1 segment of battery material is wound with a first winding constraint radius, and the i-1 segment of battery material does not meet the preset waste conditions. When the i-th segment of battery material meets the preset waste conditions, the i-th segment of battery material is wound around with a second winding constraint radius, where the second winding constraint radius is smaller than the first winding constraint radius. When the (i+1)th segment of battery material meets the preset waste conditions, the (i+1)th segment of battery material is wound around with a third winding constraint radius, the third winding constraint radius being greater than the second winding constraint radius.

6. The method according to claim 1, characterized in that, The process of winding a wound battery using the number of winding turns as a winding reference, and winding the portion of the battery material that meets the preset waste conditions during the preparation of the wound battery from the battery material, includes: In the process of preparing the wound battery using the battery material, in response to the detection that the m-th battery material portion meets the preset discard conditions, the m-th battery material portion is wound at a first winding speed with the number of winding turns as the winding reference. In response to the detection 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, where the first winding speed is different from the second winding speed, and m and n are positive integers.

7. The method according to claim 1, characterized in that, The process of obtaining the pre-set winding constraint radius used when winding waste material through the winding needle includes: In response to the detection that the j-th battery material is a secondary electrode material whose energy conversion rate does not meet the preset conversion rate, the energy conversion rate difference between the energy conversion rate and the preset conversion rate is obtained, where j is a positive integer; The winding constraint radius used when winding waste material through the winding needle is determined based on the conversion rate difference; wherein the conversion rate difference is directly proportional to the winding constraint radius.

8. A battery material winding apparatus for performing the battery material winding method of claim 1, the apparatus comprising: The acquisition module is used to acquire the radius of the winding needle used for winding battery material; The acquisition module is further configured to acquire the thickness of the waste material and to acquire a pre-set winding constraint radius used when winding the waste material through the winding needle. The waste material thickness is used to characterize the thickness of the battery material to be discarded, and the winding constraint radius is the dimensional constraint information of the finished waste material obtained by winding the battery material to be discarded. The waste material thickness includes the tape thickness and the electrode thickness. The tape thickness is the thickness of the connecting tape connecting the first separator roll and the second separator roll. The first separator roll and the second separator roll are different separator rolls used to provide the battery separator in the battery material. The battery material to be discarded includes a connecting section that connects the first separator roll and the second separator roll through the connecting tape. The electrode thickness is the thickness corresponding to the secondary electrode material in the battery material. The battery material to be discarded includes the secondary electrode material and a battery separator for discarding the secondary electrode material. The energy conversion rate of the secondary electrode material does not meet the preset conversion rate. The electrode material includes at least one of a positive electrode and a negative electrode. The determination module is used to obtain the difference between the winding constraint radius and the winding needle radius to obtain winding space information; obtain the separator thickness of the battery separator in the battery material; analyze the winding space information and the thickness of the waste material to obtain separator winding space information, which is used to characterize the space occupied by the battery separator in the wound battery material; and take the quotient of the separator winding space information and twice the separator thickness as the number of winding turns. A winding module is used to wind the portion of the battery material that meets the preset waste conditions during the process of preparing a wound battery from the battery material, using the number of winding turns as a winding reference.

9. A computer device, characterized in that, The computer device includes a processor and a memory, the memory storing at least one program, which is loaded and executed by the processor to implement the winding method of the battery material as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The storage medium stores at least one program segment, which is loaded and executed by a processor to implement the winding method of the battery material as described in any one of claims 1 to 7.

11. A computer program product, characterized in that, It includes computer instructions that, when executed by a processor, implement the winding method of the battery material as described in any one of claims 1 to 7.

Images