Winding method and winding device

Abstract

The invention provides a winding method and winding equipment, relates to the technical field of battery production, and aims to at least solve the problems of low detection efficiency, low accuracy, low productivity and the like when a battery cell formed after a winding process is detected in related technologies. The winding equipment comprises a first pole piece unwinding mechanism used for releasing a first pole piece; the second pole piece unwinding mechanism is used for releasing a second pole piece; the first diaphragm unwinding mechanism is used for releasing the first diaphragm; the second diaphragm unwinding mechanism is used for releasing a second diaphragm; the hot-pressing compounding mechanism is used for hot-pressing and compounding the target pole piece and the target diaphragm to form a hot-pressing composite material belt; the detection mechanism is used for determining the detection result of the hot-pressing composite material belt based on the current current of the detection loop; wherein the detection loop comprises a detection mechanism, a hot-pressing composite mechanism and a hot-pressing composite material belt; and the winding mechanism is used for winding the hot-pressing composite material belt.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of battery manufacturing technology, and in particular to a winding method and winding equipment. Background Technology

[0002] In related technologies, the detection of the battery cells formed after the winding process is usually carried out (e.g., short circuit detection, open circuit detection, etc.), which has problems such as low detection efficiency, low accuracy, and low productivity. Summary of the Invention

[0003] This disclosure provides a winding method and a winding apparatus.

[0004] The technical solution of this disclosure embodiment is implemented as follows:

[0005] This disclosure provides a winding device, including a first electrode unwinding mechanism, a second electrode unwinding mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a winding mechanism, a hot-pressing composite mechanism, and a detection mechanism, wherein:

[0006] The first electrode unwinding mechanism is used to release the first electrode.

[0007] The second electrode unwinding mechanism is used to release the second electrode.

[0008] The first diaphragm unwinding mechanism is used to release the first diaphragm;

[0009] The second diaphragm unwinding mechanism is used to release the second diaphragm;

[0010] The hot-pressing composite mechanism is used to hot-press a target electrode and a target diaphragm to form a hot-pressed composite strip; wherein, the target electrode includes at least one of the following: a current first electrode released by the first electrode unwinding mechanism and a current second electrode released by the second electrode unwinding mechanism, and the target diaphragm includes at least one of the following: a current first diaphragm released by the first diaphragm unwinding mechanism and a current second diaphragm released by the second diaphragm unwinding mechanism;

[0011] The detection mechanism is used to determine the detection result of the hot-pressed composite strip based on the current of the detection circuit; wherein, the detection circuit includes the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip;

[0012] The winding mechanism is used to wind the hot-pressed composite strip.

[0013] In this embodiment, firstly, a hot-pressing composite mechanism and a detection mechanism are integrated into the winding equipment. Detection is performed simultaneously with the hot-pressing composite, realizing the concurrent execution of these two processes. Compared to hot-pressing composite first, then winding, and finally detection, this approach reduces the time spent on each independent process, improving production efficiency and thus increasing equipment productivity. Furthermore, it improves detection effectiveness, reducing the possibility of defects going undetected due to pressure or temperature reduction between the electrode and separator, the electrode and foreign matter (e.g., burrs, particles, dust), or the separator and foreign matter. Secondly, during the hot-pressing composite process, the hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator. This ensures sufficient compression and heating of foreign matter, enabling accurate detection of the impact of foreign matter on the battery cell and reducing missed detections and false positives. This process reduces the likelihood of defective cells being released, ensuring battery heat dissipation and lifespan. Furthermore, the hot-pressing composite mechanism pre-presses the target separator and electrode, reducing the possibility of deformation, loosening, or wrinkling in the hot-pressed composite strip, thus improving its quality. Secondly, the detection circuit formed between the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip effectively detects short circuits caused by foreign objects piercing the electrode or separator, improving detection accuracy and comprehensiveness, thereby enhancing product safety and reliability. Finally, the automatic detection of the hot-pressed composite strip using the current in the detection circuit improves the timeliness, accuracy, efficiency, and automation of the detection results compared to manual inspection, meeting the demands of high-efficiency and high-time-sensitivity production.

[0014] In some embodiments, the winding equipment further includes a cutting mechanism located upstream of the hot-pressing composite mechanism, used to cut the next electrode released by the target electrode unwinding mechanism when the detection result of the hot-pressing composite strip is a second detection result; wherein the second detection result indicates that the hot-pressing composite strip has a defect, and the target electrode unwinding mechanism includes at least one of the following: a first electrode unwinding mechanism and a second electrode unwinding mechanism.

[0015] In this embodiment, on the one hand, the integration of a cutting mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving its versatility and adaptability; on the other hand, when there are defects in the hot-pressed composite strip, the next electrode sheet is cut off in time, improving the targeted nature of the electrode sheet cutting process. At the same time, compared with scrapping the entire battery cell, only a portion of the battery cell is scrapped, achieving the purpose of saving materials, thereby reducing the manufacturing cost of the battery and improving the productivity of the equipment.

[0016] In some embodiments, the winding device further includes a receiving mechanism located upstream of the cutting mechanism for connecting the cut next electrode sheet to the winding mechanism.

[0017] In this embodiment, on the one hand, the integration of a receiving mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving the versatility and adaptability of the winding equipment; on the other hand, after cutting off the next electrode sheet, the receiving mechanism is used to promptly receive the electrode sheet, ensuring the normal operation of product production and meeting the production requirements of high timeliness and high efficiency.

[0018] In some embodiments, the hot-pressing composite mechanism includes a pressure sensing component, a displacement sensing component, a temperature sensing component, a composite component, and a driving component. The composite component includes a first composite roller and a second composite roller, wherein: the displacement sensing component is used to detect the current distance between the first composite roller and the second composite roller; the driving component is used to drive the first composite roller and the second composite roller to move based on the current distance detected by the displacement sensing component, so as to decrease or increase the distance between the first composite roller and the second composite roller; the pressure sensing component is used to detect the current pressure between the first composite roller and the second composite roller; the driving component is further used to drive the first composite roller and the second composite roller to move when the current pressure is not within a pressure threshold range, so that the pressure between the first composite roller and the second composite roller is within the pressure threshold range; the temperature sensing component is used to detect the current temperature of the first composite roller and the current temperature of the second composite roller; the detection mechanism is further used to adjust the current current of the detection circuit based on the current temperature of the target composite roller when the current temperature of the target composite roller is not within the temperature threshold range, so that the temperature of the target composite roller is within the temperature threshold range.

[0019] In this embodiment, firstly, the electrode and diaphragm are hot-pressed using two composite rollers, which not only reduces interference between them but also increases the hot-pressing time, ensuring continuous compression between the electrode and diaphragm and weakening the insulation performance of the diaphragm, thus improving defect detection efficiency. Secondly, the distance between the two composite rollers is accurately detected by a displacement sensing component integrated in the hot-pressing composite mechanism, facilitating accurate control of the rollers' movement. Thirdly, the pressure between the two composite rollers is detected in real time by a pressure sensing component integrated in the hot-pressing composite mechanism, accurately pressurizing the electrode and diaphragm, reducing the possibility of poor performance due to insufficient pressure or deformation due to excessive pressure. Fourthly, the temperature of the two composite rollers is detected in real time by a temperature sensing component integrated in the hot-pressing composite mechanism, accurately heating the electrode and diaphragm, reducing the possibility of poor performance due to excessively low temperature or poor insulation performance of the diaphragm due to excessively high temperature. Finally, the two composite rollers are driven in a timely manner by a driving component, ensuring the normal operation of the hot-pressing composite process.

[0020] In some embodiments, the composite includes a heating element for heating the composite based on the current of the detection circuit.

[0021] In this embodiment of the disclosure, by integrating a heating element into the composite component, the composite component has a heating function, thereby weakening the insulation performance of the diaphragm, and thus enabling accurate detection of whether the battery cell has defects at high temperatures.

[0022] In some embodiments, the width of the composite component is not less than the width of the hot-pressed composite strip.

[0023] In this embodiment of the disclosure, by setting the width of the composite part to be no less than the width of the hot-pressed composite strip, it can be ensured that all the electrode sheets are uniformly pressed, thereby improving the efficiency of defect detection.

[0024] In some embodiments, when the hot-pressed composite strip includes a first hot-pressed composite strip, the hot-pressing composite mechanism includes a first hot-pressing composite mechanism, the detection mechanism includes a first detection mechanism, and the detection circuit includes a first detection circuit, wherein: the first hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, the current second electrode, and the current second diaphragm to form the first hot-pressed composite strip; the first detection mechanism is used to determine the detection result of the first hot-pressed composite strip based on the current current of the first detection circuit, and the first detection circuit includes the first detection mechanism, the first hot-pressing composite mechanism, and the first hot-pressed composite strip.

[0025] In this embodiment, on the one hand, the first hot-pressing composite mechanism pre-composites the current first electrode, the current first separator, the current second electrode, and the current second separator, reducing the possibility of deformation, loosening, or wrinkling of the first hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the first hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator, achieving sufficient compression and heating of foreign matter. This enables accurate detection of whether puncture has occurred between the electrode and separator, reducing the possibility of missed or false detections, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0026] In some embodiments, when the hot-pressed composite strip includes a second hot-pressed composite strip, the hot-pressing composite mechanism includes a second hot-pressing composite mechanism, the detection mechanism includes a second detection mechanism, and the detection circuit includes a second detection circuit. The second hot-pressing composite mechanism is used for hot-pressing composite of the current first electrode and the current first diaphragm to form the second hot-pressed composite strip. The second detection mechanism is used to determine the detection result of the second hot-pressed composite strip based on the current current of the second detection circuit. The second detection circuit includes the second detection mechanism, the second hot-pressing composite mechanism, and the second hot-pressing composite strip. The hot-pressed composite strip; and / or, in the case where the hot-pressed composite strip includes a third hot-pressed composite strip, the hot-pressed composite mechanism includes a third hot-pressed composite mechanism, the detection mechanism includes a third detection mechanism, the detection circuit includes a third detection circuit, the third hot-pressed composite mechanism is used to hot-press the current second electrode and the current second diaphragm to form the third hot-pressed composite strip; the third detection mechanism is used to determine the detection result of the third hot-pressed composite strip based on the current current of the third detection circuit, the third detection circuit includes the third detection mechanism, the third hot-pressed composite mechanism and the third hot-pressed composite strip.

[0027] In this embodiment, on the one hand, the first electrode and the first separator are pre-pressed together by a second hot-pressing composite mechanism, and the second electrode and the second separator are pre-pressed together by a third hot-pressing composite mechanism. This reduces the possibility of deformation, loosening, and wrinkling of the second and third hot-pressed composite strips, thereby improving the quality of the hot-pressed composite strips. On the other hand, during the hot-pressing composite process, the electrode and separator are continuously pressurized and heated by the second hot-pressing composite mechanism and by the third hot-pressing composite mechanism. This ensures that foreign matter is fully squeezed and fully heated, and can accurately detect whether punctures have occurred between the first electrode and the first separator, or between the second electrode and the second separator. This not only improves the comprehensiveness of the detection but also reduces the possibility of missed or false detections, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0028] In some embodiments, where the hot-pressed composite strip further includes a fourth hot-pressed composite strip, the hot-pressing composite mechanism further includes a fourth hot-pressing composite mechanism, the detection mechanism further includes a fourth detection mechanism, and the detection circuit further includes a fourth detection circuit. The fourth hot-pressing composite mechanism is used to hot-press the second hot-pressed composite strip and the third hot-pressed composite strip to form the fourth hot-pressed composite strip. The fourth detection mechanism is used to determine the detection result of the fourth hot-pressed composite strip based on the current of the fourth detection circuit. The fourth detection circuit includes the fourth detection mechanism, the fourth hot-pressing composite mechanism, and the fourth hot-pressed composite strip.

[0029] In this embodiment, on the one hand, the second and third hot-pressed composite strips are pre-pressed together by the fourth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, and wrinkling of the fourth hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the fourth hot-pressing composite mechanism continuously applies pressure and heat to the hot-pressed composite strip, achieving sufficient extrusion and heating of foreign matter, and further detecting whether puncture has occurred between the electrode and the separator. This not only improves the comprehensiveness of the detection, but also further reduces the possibility of missed detections and false detections after multiple hot-pressing processes, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0030] In some embodiments, when the hot-pressed composite strip includes a fifth hot-pressed composite strip, the hot-pressing composite mechanism includes a fifth hot-pressing composite mechanism, the detection mechanism includes a fifth detection mechanism, and the detection circuit includes a fifth detection circuit. The fifth hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, and the current second electrode to form the fifth hot-pressed composite strip. The fifth detection mechanism is used to determine the detection result of the fifth hot-pressed composite strip based on the current current of the fifth detection circuit. The fifth detection circuit includes the fifth detection mechanism, the fifth hot-pressing composite mechanism, and the fifth hot-pressed composite strip.

[0031] In this embodiment, on the one hand, the first electrode, the first separator, and the second electrode are pre-pressed together by the fifth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, or wrinkling of the hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the fifth hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator, achieving sufficient compression and heating of foreign matter. This enables accurate detection of whether puncture has occurred between the electrode and separator, reducing the possibility of missed or false detections, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0032] In some embodiments, where the hot-pressed composite strip further includes a sixth hot-pressed composite strip, the hot-pressing composite mechanism further includes a sixth hot-pressing composite mechanism, the detection mechanism further includes a sixth detection mechanism, and the detection circuit further includes a sixth detection circuit. The sixth hot-pressing composite mechanism is used to hot-press the fifth hot-pressed composite strip and the current second diaphragm to form the sixth hot-pressed composite strip. The sixth detection mechanism is used to determine the detection result of the sixth hot-pressed composite strip based on the current current of the sixth detection circuit. The sixth detection circuit includes the sixth detection mechanism, the sixth hot-pressing composite mechanism, and the sixth hot-pressed composite strip.

[0033] In this embodiment, on the one hand, the fifth hot-pressed composite strip and the current second separator are pre-hot-pressed together by the sixth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, wrinkling, etc. of the sixth hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip; on the other hand, during the hot-pressing composite process, the sixth hot-pressing composite mechanism continuously pressurizes and heats the hot-pressed composite strip and the separator, so as to fully compress and heat the foreign matter, and further detect whether puncture has occurred between the electrode and the separator. This not only improves the comprehensiveness of the detection, but also further reduces the possibility of missed detection and false detection after multiple hot-pressing, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0034] This disclosure provides a winding method, the winding method comprising:

[0035] The hot-pressing composite mechanism of the control winding equipment hot-presses and composites a target electrode sheet and a target diaphragm to form a hot-pressed composite strip; wherein, the winding equipment includes a first electrode sheet unwinding mechanism, a second electrode sheet unwinding mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a winding mechanism, the hot-pressing composite mechanism, and a detection mechanism; the target electrode sheet includes at least one of the following: a current first electrode sheet released by the first electrode sheet unwinding mechanism, and a current second electrode sheet released by the second electrode sheet unwinding mechanism; the target diaphragm includes at least one of the following: a current first diaphragm released by the first diaphragm unwinding mechanism, and a current first diaphragm released by the second diaphragm unwinding mechanism.

[0036] The detection result of the hot-pressed composite strip is determined based on the current of the detection circuit; wherein, the detection circuit includes the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip;

[0037] Control the winding mechanism to wind the hot-pressed composite strip.

[0038] In this embodiment, firstly, a hot-pressing composite mechanism and a detection mechanism are integrated into the winding equipment. Detection is performed simultaneously with the hot-pressing composite, realizing the concurrent execution of these two processes. Compared to hot-pressing composite first, then winding, and finally detection, this approach reduces the time spent on each independent process, improving production efficiency and thus increasing equipment productivity. Furthermore, it improves detection effectiveness, reducing the possibility of defects going undetected due to pressure or temperature reduction between the electrode and separator, the electrode and foreign matter (e.g., burrs, particles, dust), or the separator and foreign matter. Secondly, during the hot-pressing composite process, the hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator. This ensures sufficient compression and heating of foreign matter, enabling accurate detection of the impact of foreign matter on the battery cell and reducing missed detections and false positives. This process reduces the likelihood of defective cells being released, ensuring battery heat dissipation and lifespan. Furthermore, the hot-pressing composite mechanism pre-presses the target separator and electrode, reducing the possibility of deformation, loosening, or wrinkling in the hot-pressed composite strip, thus improving its quality. Secondly, the detection circuit formed between the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip effectively detects short circuits caused by foreign objects piercing the electrode or separator, improving detection accuracy and comprehensiveness, thereby enhancing product safety and reliability. Finally, the automatic detection of the hot-pressed composite strip using the current in the detection circuit improves the timeliness, accuracy, efficiency, and automation of the detection results compared to manual inspection, meeting the demands of high-efficiency and high-time-sensitivity production.

[0039] In some embodiments, determining the detection result of the hot-pressed composite strip based on the current current of the detection circuit includes: determining the resistance of the hot-pressed composite strip based on the current current and current detection voltage of the detection circuit; wherein the current detection voltage is determined based on the target diaphragm; if the resistance of the hot-pressed composite strip is within a resistance threshold range, a first detection result is taken as the detection result of the hot-pressed composite strip; wherein the first detection result indicates that the hot-pressed composite strip has no defects; if the resistance of the hot-pressed composite strip is not within the resistance threshold range, a second detection result is taken as the detection result of the hot-pressed composite strip; wherein the second detection result indicates that the hot-pressed composite strip has defects.

[0040] In this embodiment, on the one hand, determining the current detection voltage based on the target diaphragm not only improves the accuracy of the current detection voltage, but also enables compatibility with different diaphragms, enhancing versatility and adaptability, and meeting the needs of highly flexible battery cell production; on the other hand, determining the detection result based on the resistance and resistance threshold range of the hot-pressed composite strip improves the accuracy of the detection result.

[0041] In some embodiments, the winding equipment further includes a cutting mechanism located upstream of the hot-pressing composite mechanism, and the winding method further includes: if the detection result of the hot-pressing composite strip is a second detection result, controlling the cutting mechanism to cut the next electrode released by the target electrode unwinding mechanism; wherein the target electrode unwinding mechanism includes at least one of the following: a first electrode unwinding mechanism and a second electrode unwinding mechanism.

[0042] In this embodiment, on the one hand, the integration of a cutting mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving its versatility and adaptability; on the other hand, the timely cutting of the next electrode sheet when there is an abnormality in the hot-pressed composite strip improves the targeting of the electrode sheet cutting process. At the same time, compared with the subsequent scrapping of the entire battery cell, only a portion of the battery cell is scrapped, achieving the purpose of saving materials, thereby reducing the manufacturing cost of the battery and improving the productivity of the equipment.

[0043] In some embodiments, the winding apparatus further includes a receiving mechanism located upstream of the cutting mechanism, and the winding method further includes controlling the receiving mechanism to connect the next electrode sheet to the winding mechanism.

[0044] In this embodiment, on the one hand, the integration of a receiving mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving the versatility and adaptability of the winding equipment; on the other hand, after cutting off the next electrode sheet, the receiving mechanism is used to promptly receive the electrode sheet, ensuring the normal operation of product production and meeting the production requirements of high timeliness and high efficiency.

[0045] In some embodiments, the hot-pressing composite mechanism includes a composite component, a driving component, and a displacement sensing component. The composite component includes a first composite roller and a second composite roller. The winding method further includes: controlling the displacement sensing component to detect the current distance between the first composite roller and the second composite roller; and based on the current distance, controlling the driving component to drive the first composite roller and the second composite roller to move, so as to decrease or increase the distance between the first composite roller and the second composite roller.

[0046] In this embodiment, firstly, the electrode and diaphragm are hot-pressed by two composite rollers, which not only reduces interference between them but also increases the hot-pressing time of the electrode and diaphragm, ensuring that the electrode and diaphragm are in a continuously compressed state and weakening the insulation performance of the diaphragm, thereby improving the efficiency of defect detection. Secondly, the distance between the two composite rollers is accurately detected by the displacement sensing component integrated in the hot-pressing composite mechanism, so as to accurately control the movement of the pressurizing component. Finally, the two composite rollers are driven in a timely manner by controlling the drive component, ensuring the normal operation of the hot-pressing composite process.

[0047] In some embodiments, the hot-pressing composite mechanism further includes a pressure sensing component, and the winding method further includes: controlling the pressure sensing component to detect the current pressure between the first composite roller and the second composite roller; if the current pressure is not within the pressure threshold range, controlling the drive member to drive the first composite roller and the second composite roller to move based on the current pressure until the next pressure detected by the pressure sensing component is within the pressure threshold range.

[0048] In this embodiment, on the one hand, by integrating a pressure sensing component into the hot-pressing composite mechanism to detect the pressure between the two composite rollers in real time, the electrode, diaphragm, etc. are accurately pressurized, reducing the possibility of poor performance due to insufficient pressure or deformation of the electrode, diaphragm, etc. due to excessive pressure; on the other hand, by controlling the movement of the composite rollers according to the current pressure and pressure threshold range, the accuracy of the movement of the composite rollers is improved, thereby ensuring that the electrode, diaphragm, etc. are within the normal pressure range.

[0049] In some embodiments, the hot-pressing composite mechanism further includes a temperature sensing component, and the winding method further includes: controlling the temperature sensing component to detect the current temperature of the first composite roller and the current temperature of the second composite roller respectively; if the current temperature of the target composite roller is not within the temperature threshold range, determining the target current of the detection circuit based on the current temperature of the target composite roller, and adjusting the current current of the detection circuit to the target current so that the temperature of the target composite roller is within the temperature threshold range.

[0050] In this embodiment, on the one hand, by integrating a temperature sensing component into the hot-pressing composite mechanism to detect the temperature of the two composite rollers in real time, the electrode sheet, diaphragm, etc. are accurately heated, reducing the possibility of poor performance due to excessively low temperature or poor insulation performance of the diaphragm due to excessively high temperature; on the other hand, by adjusting the current of the detection circuit according to the current temperature and temperature threshold range, the accuracy of the current is improved, thereby ensuring that the temperature of the composite roller is within the normal temperature range.

[0051] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0053] Figure 1 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 1 ;

[0054] Figure 2 This is a schematic diagram illustrating the positional relationship of two composite rollers provided in an embodiment of the present disclosure;

[0055] Figure 3 A schematic diagram of the composition structure of a hot-pressing composite mechanism provided in an embodiment of this disclosure;

[0056] Figure 4 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 2 ;

[0057] Figure 5 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 3 ;

[0058] Figure 6 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 4 ;

[0059] Figure 7 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 5 ;

[0060] Figure 8 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 6 ;

[0061] Figure 9 A schematic diagram of the implementation process of a winding method provided in this embodiment of the present disclosure. Figure 1 ;

[0062] Figure 10 A schematic diagram of the implementation process of a winding method provided in this embodiment of the present disclosure. Figure 2 . Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this disclosure. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0064] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0065] In the following description, the terms “first, second, third” are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that “first, second, third” may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0067] In related technologies, the application of new energy batteries in daily life and industry is becoming increasingly widespread. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing. A battery can be a single battery cell. A single battery cell is a basic unit capable of converting chemical energy into electrical energy, which can be used to make battery modules or battery packs to supply power to electrical devices. A single battery cell can also be a rechargeable battery, which is a battery cell that can be recharged after discharge to reactivate the active materials and continue to be used. Single battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc. A battery can also be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, they are connected in series, parallel, or in a mixed configuration via a busbar. Electrode plates are the main components of a single battery cell, directly determining the battery's electrochemical performance and safety.

[0068] Electrodes are a key component of a single battery cell, directly determining the battery's electrochemical performance and safety. Electrodes consist of a metal current collector and a uniform coating applied to the metal current collector. During manufacturing, electrodes are transported in rolls for coating, rolling, and slitting processes.

[0069] The winding process is an essential step in battery production, involving winding the electrodes and separator to form a battery cell. Currently, short-circuit and open-circuit tests are typically performed on the cells formed after the winding process. For example, cylindrical battery cells undergo short-circuit testing at room temperature and pressure, while prismatic battery cells are first hot-pressed and then short-circuit tested. This process, requiring multiple steps (winding, hot-pressing, testing, etc.) to complete cell testing, increases testing time and reduces efficiency and productivity. Furthermore, because testing is performed after hot-pressing, there is a possibility that some defects may not be detected due to pressure relief between the electrodes and separator, between the electrodes and foreign objects (e.g., burrs, particles, dust), and between the separator and foreign objects, resulting in poor testing effectiveness.

[0070] This disclosure provides a winding device. First, a hot-pressing composite mechanism and a detection mechanism are integrated into the winding device, allowing detection to be performed simultaneously with the hot-pressing composite. This achieves simultaneous hot-pressing composite and detection processes, which, compared to hot-pressing composite first, then winding, and finally detection, reduces the time of each independent process, improves production efficiency, and thus increases the productivity of the equipment. Furthermore, it improves the detection effect, reducing the possibility of defects being undetected due to pressure or temperature reduction between the electrode and the separator, the electrode and foreign objects (e.g., burrs, particles, dust), or the separator and foreign objects. Second, during the hot-pressing composite process, the hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator, fully compressing and heating the foreign objects, enabling accurate detection of the impact of foreign objects on the battery cell and reducing leakage. This reduces the possibility of false positives and negatives, thus lowering the likelihood of defective cells leaving the battery and ensuring its heat dissipation and lifespan. Furthermore, the hot-pressing composite mechanism pre-presses the target separator and target electrode, reducing the possibility of deformation, loosening, and wrinkling in the hot-pressed composite strip, thereby improving its quality. Secondly, the detection circuit formed between the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip effectively detects short circuits caused by foreign objects piercing the electrode or separator, improving detection accuracy and comprehensiveness, and thus enhancing product safety and reliability. Finally, the automatic detection of the hot-pressed composite strip using the current in the detection circuit improves the timeliness, accuracy, efficiency, and automation of the detection results compared to manual inspection, meeting the demands of high-efficiency and high-time-sensitivity production.

[0071] The method provided in this disclosure can be executed by a winding device, a control device, etc. The winding device can be any suitable type and suitable for any scenario. In some embodiments, the winding device may include the control device. The control device may include, but is not limited to, at least one of a programmable logic controller (PLC), a host computer, a mid-level computer, a microcontroller, etc. In implementation, the control device may further include a processor and a memory storing processor-executable instructions; when the instructions are executed by the processor, the method provided in this disclosure is implemented.

[0072] The technical solutions in the embodiments of this disclosure will now be clearly and completely described with reference to the accompanying drawings.

[0073] Figure 1 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 1 ,like Figure 1 As shown, the winding equipment 10 includes a first electrode unwinding mechanism 11A, a second electrode unwinding mechanism 11B, a first diaphragm unwinding mechanism 12A, a second diaphragm unwinding mechanism 12B, a hot-pressing composite mechanism 13, a detection mechanism 14, and a winding mechanism 15, wherein:

[0074] The first electrode unwinding mechanism 11A is used to release the first electrode;

[0075] The second electrode unwinding mechanism 11B is used to release the second electrode;

[0076] The first diaphragm unwinding mechanism 12A is used to release the first diaphragm;

[0077] The second diaphragm unwinding mechanism 12B is used to release the second diaphragm;

[0078] Hot-pressing composite mechanism 13 is used to hot-press the target electrode and the target diaphragm to form a hot-pressed composite strip;

[0079] The detection mechanism 14 is used to determine the detection result of the hot-pressed composite strip based on the current current of the detection circuit; wherein, the detection circuit includes the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip;

[0080] The winding mechanism 15 is used to wind the hot-pressed composite strip.

[0081] Here, the electrode unwinding mechanism (including a first electrode unwinding mechanism and a second electrode unwinding mechanism) can be any suitable mechanism capable of unwinding the electrode. In some embodiments, the electrode unwinding mechanism may include an electrode unwinding shaft on which the electrode is wound. During implementation, the electrode unwinding shaft releases the electrode when it rotates around its central axis. In some embodiments, the electrode unwinding mechanism may also include a spare electrode unwinding shaft, an electrode changing device, etc. The spare electrode unwinding shaft is used to release a spare electrode, and the electrode changing device is used to automatically switch the electrode unwinding shaft to the spare electrode unwinding shaft, that is, by pulling the tail end of the electrode on the electrode unwinding shaft to the head end of the spare electrode unwinding shaft for engagement. Thus, automatic electrode changing is achieved through this changing device, improving changing efficiency and thereby increasing the working efficiency of the winding equipment.

[0082] The electrode (including the first electrode and the second electrode) can be formed from any suitable material, such as aluminum, nickel, copper, etc. The first electrode and the second electrode can be different electrodes; for example, the first electrode can be an anode electrode (or a positive electrode), and the second electrode can be a cathode electrode (or a negative electrode). Alternatively, the first electrode can be a cathode electrode, and the second electrode can be an anode electrode.

[0083] The target electrode may include, but is not limited to, at least one of the current first electrode released by the first electrode unwinding mechanism and the current second electrode released by the second electrode unwinding mechanism. The current first electrode refers to the first electrode flowing into the hot-pressing composite mechanism at the current moment, and the current second electrode refers to the second electrode flowing into the hot-pressing composite mechanism at the current moment. For example, the target electrode may include both the current first electrode and the current second electrode. Or, for another example, the target electrode may include either the current first electrode or the current second electrode.

[0084] The diaphragm unwinding mechanism (including a first diaphragm unwinding mechanism and a second diaphragm unwinding mechanism) can be any suitable mechanism capable of unwinding the diaphragm. In some embodiments, the diaphragm unwinding mechanism may include a diaphragm unwinding shaft on which the diaphragm is wound. During implementation, the diaphragm unwinding shaft releases the diaphragm as it rotates around its central axis. In some embodiments, the diaphragm unwinding mechanism may also include a spare diaphragm unwinding shaft, a diaphragm changing device, etc. The spare diaphragm unwinding shaft is used to release a spare diaphragm, and the diaphragm changing device is used to automatically switch the diaphragm unwinding shaft to the spare diaphragm unwinding shaft, that is, by pulling the tail end of the diaphragm on the unwinding shaft to the head end of the spare diaphragm unwinding shaft for engagement. Thus, the automatic diaphragm changing is achieved through this changing device, improving the changing efficiency and thereby increasing the working efficiency of the winding equipment.

[0085] The diaphragm (including the first diaphragm and the second diaphragm), also known as the separator, has insulating properties. The diaphragm can be made of any suitable material capable of achieving this insulating function, such as PP (polypropylene) or PE (polyethylene). The first and second diaphragms can be different diaphragms or the same diaphragm. In some embodiments, the first diaphragm can be the upper diaphragm, and the second diaphragm can be the lower diaphragm, to complete the encapsulation of the anode and cathode plates.

[0086] The target diaphragm may include at least one of the current first diaphragm released by the first diaphragm unwinding mechanism and the current second diaphragm released by the second diaphragm unwinding mechanism. The current first diaphragm refers to the first diaphragm currently flowing into the hot-pressing compounding mechanism, and the current second diaphragm refers to the second diaphragm currently flowing into the hot-pressing compounding mechanism. For example, the target diaphragm includes both the current first diaphragm and the current second diaphragm. Or, for another example, the target diaphragm includes either the current first diaphragm or the current second diaphragm.

[0087] In some implementations, the width of the diaphragm is not less than the width of the electrode, so that the diaphragm can completely enclose the electrode, thereby achieving a better insulation effect.

[0088] In some embodiments, the diaphragm unwinding mechanism and the electrode unwinding mechanism are spaced apart. For example, from left to right, the first electrode unwinding mechanism, the first diaphragm unwinding mechanism, the second electrode unwinding mechanism, and the second diaphragm unwinding mechanism are arranged sequentially, that is, the first diaphragm unwinding mechanism is located between the first electrode unwinding mechanism and the second electrode unwinding mechanism, and the second diaphragm unwinding mechanism is located after the second electrode unwinding mechanism. As another example, from left to right, the first diaphragm unwinding mechanism, the first electrode unwinding mechanism, the second diaphragm unwinding mechanism, and the second electrode unwinding mechanism are arranged sequentially, that is, the first electrode unwinding mechanism is located between the first diaphragm unwinding mechanism and the second diaphragm unwinding mechanism, and the second electrode unwinding mechanism is located after the second diaphragm unwinding mechanism.

[0089] The hot-pressing composite mechanism (including other hot-pressing composite mechanisms mentioned below) can be any suitable mechanism capable of achieving the hot-pressing composite function. In implementation, the hot-pressing composite mechanism is disposed around the periphery of the electrode and diaphragm to facilitate hot pressing of the electrode, diaphragm, etc. The hot-pressing composite mechanism can be a hollow structure, a solid structure, etc. The cross-section of the hot-pressing composite mechanism can be any suitable shape, such as circular, elliptical, square, etc. In some embodiments, the shape of the cross-section of the hot-pressing composite mechanism is adapted to the shape of the cross-section of the electrode.

[0090] In some embodiments, the number of the hot-pressing composite mechanism can be at least one, such as one, two, three, etc. In practice, the number of the hot-pressing composite mechanism is related to the electrode composite process. The electrode composite process can include, but is not limited to, two-in-one composite, three-in-one composite, four-in-one composite, etc. Two-in-one composite refers to the composite between the first electrode and the first diaphragm, or the composite between the second electrode and the second diaphragm. Three-in-one composite refers to the composite between the first electrode, the first diaphragm, and the second electrode. Four-in-one composite refers to the composite between the first electrode, the first diaphragm, the second electrode, and the second diaphragm.

[0091] For example, the hot-pressing composite mechanism is one in number, and the hot-pressing composite mechanism realizes three-in-one composite or four-in-one composite.

[0092] For example, there can be two hot-pressing composite mechanisms. Both of these mechanisms can achieve two-in-one composite, or the first hot-pressing composite mechanism can achieve three-in-one composite, and the second hot-pressing composite mechanism can perform hot-pressing composite on the hot-pressed composite strip formed by the first hot-pressing composite mechanism and the current second diaphragm.

[0093] For example, the number of hot-pressing composite mechanisms can be three, wherein the first hot-pressing composite mechanism realizes the two-in-one composite between the current first electrode and the current first diaphragm, the second hot-pressing composite mechanism realizes the two-in-one composite between the current second electrode and the current second diaphragm, and the third hot-pressing composite mechanism realizes the composite between the hot-pressed composite strip formed by the first hot-pressing composite mechanism and the hot-pressed composite strip formed by the second hot-pressing composite mechanism.

[0094] In some embodiments, the hot-pressing composite mechanism is bonded to the surface of the electrode, diaphragm, etc., at a preset pressure to apply pressure to the electrode, diaphragm, etc. The preset pressure can be any suitable pressure, such as 0.2 MPa or 0.28 MPa. In some embodiments, the preset pressure can be within a pressure threshold range, which is determined based on the material of the electrode and the diaphragm. For example, the pressure threshold range can be 0.1 MPa to 0.5 MPa. Another example is a pressure threshold range of 0.08 MPa to 0.54 MPa.

[0095] In some embodiments, the hot-pressing composite mechanism includes a composite component and a drive component.

[0096] Here, the composite component can be any suitable part capable of performing the hot pressing function. For example, a wheel, roller, etc. The number of the composite component can be at least one, for example, one, two, etc.

[0097] In some embodiments, the composite component includes a first composite roller and a second composite roller. The shape, structure, and applied hot pressure of the first and second composite rollers may be the same or different. In practice, the electrode sheet, diaphragm, etc., are simultaneously hot-pressed by the first and second composite rollers to achieve sufficient pressure and heat treatment.

[0098] Figure 2 This is a schematic diagram illustrating the positional relationship of two composite rollers provided in an embodiment of this disclosure, as shown below. Figure 2 As shown, the composite component includes a first composite roller 131 and a second composite roller 132 symmetrically distributed on the left and right sides. The first composite roller 131 is located on the left side of the electrode sheet, and the second composite roller 132 is located on the right side of the diaphragm.

[0099] In this embodiment of the present disclosure, the electrode sheet, diaphragm, etc. are hot-pressed by two composite rollers, which not only reduces the interference between them, but also increases the hot-pressing time of the electrode sheet, diaphragm, etc., ensuring that the electrode sheet and diaphragm are in a continuous compressed state and weakening the insulation performance of the diaphragm, thereby improving the efficiency of defect detection.

[0100] In some embodiments, the composite includes a heating element for heating the composite based on the current in the detection circuit.

[0101] Here, the heating element (including other heating elements mentioned later) can be any suitable component capable of generating heat, such as a heating rod. The material of the heating element can be any suitable material capable of conducting heat, such as stainless steel, tungsten carbide, or an iron rod. In some embodiments, the heating element can be embedded within the composite component. Thus, by integrating the heating element into the composite component, the composite component gains a heating function, weakening the insulating properties of the diaphragm, thereby enabling accurate detection of defects in the battery cell at high temperatures.

[0102] In some implementations, the width of the composite is not less than the width of the hot-pressed composite strip.

[0103] Here, the width of the composite component can refer to its axial length. The width of the hot-pressed composite strip can refer to the axial length of the hot-pressed composite strip wound on the winding mechanism. In practice, having a width greater than or equal to the width of the hot-pressed composite strip ensures that all electrode sheets are uniformly pressed, improving the efficiency of defect detection.

[0104] The driving component can be any suitable part capable of performing a driving function, such as a motor, cylinder, or engine. This driving component is mainly used to drive the composite rollers to move away from or towards the electrodes, diaphragms, etc. The number of driving components can be at least one, for example, one or two. In some embodiments, the number of driving components is adapted to the number of composite rollers. For example, if there are two composite rollers, the number of driving components can be one or two. In practice, one driving component can be used to drive both composite rollers simultaneously, or two driving components can be used to drive the corresponding composite rollers separately. The movement of the two composite rollers can include, but is not limited to, moving towards each other or moving away from each other. Moving towards each other means that the two composite rollers move towards each other. Moving away from each other means that the two composite rollers move away from each other.

[0105] In some embodiments, the hot-pressing composite mechanism further includes a displacement sensing component for detecting the current distance between the first composite roller and the second composite roller; and a driving component for driving the first composite roller and the second composite roller to move based on the current distance detected by the displacement sensing component, so as to decrease or increase the distance between the first composite roller and the second composite roller.

[0106] Here, the displacement sensing component can be any suitable mechanism capable of displacement detection. For example, a displacement sensor. In some embodiments, the displacement sensing component can be disposed on one side of the drive member or the composite roller to detect the distance between the two composite rollers in real time. In some embodiments, the number of displacement sensing components is adapted to the number of hot-pressing composite mechanisms. For example, if there is one hot-pressing composite mechanism, then there can also be one displacement sensing component. As another example, if there are two hot-pressing composite mechanisms, then there can also be two displacement sensing components.

[0107] In some embodiments, the drive unit is connected to both the composite roller and the displacement sensing assembly, and is used to drive the composite roller closer to or further away from the electrode, diaphragm, etc. In practice, the composite roller is moved by this drive unit to ensure that the distance between the composite roller and the electrode, diaphragm, etc., is appropriate, thereby reducing the possibility of abnormal pressurization.

[0108] In this embodiment, on the one hand, the distance between the two composite rollers is accurately detected by the displacement sensing component integrated in the hot pressing composite mechanism, so as to accurately control the movement of the composite rollers; on the other hand, the two composite rollers are driven to move in a timely manner by the driving component, so as to ensure the normal operation of the hot pressing composite process.

[0109] In some embodiments, the hot-pressing composite mechanism further includes a pressure sensing component for detecting the current pressure between the first composite roller and the second composite roller; and a driving component for driving the first composite roller and the second composite roller to move when the current pressure is not within the pressure threshold range, so that the pressure between the first composite roller and the second composite roller is within the pressure threshold range.

[0110] Here, the pressure sensing component can be any suitable mechanism capable of pressure detection, such as a pressure sensor. In some embodiments, the pressure sensing component can be disposed within the composite component to detect the pressure between two composite rollers. In some embodiments, the number of pressure sensing components can be at least one, and the number of pressure sensing components is adapted to the number of composite rollers. For example, a composite roller may include at least one pressure sensing component. For example, the number of pressure sensing components is one, which is used to detect the pressure between the first and second composite rollers at that location. For example, the number of pressure sensing components is two, each used to detect the pressure between each end of the two composite rollers, to ensure that the pressure deviation applied to each end of the composite rollers is not too large, thereby improving the accuracy of pressure application.

[0111] The pressure threshold range can be any suitable range. In some embodiments, the pressure threshold range is determined based on the materials of the electrode and the separator. In some embodiments, the pressure threshold range may include a first pressure threshold and a second pressure threshold, where the first pressure threshold is less than the second pressure threshold. In some embodiments, if the current pressure is less than the first pressure threshold, it indicates that the current pressure is too low, and the distance between the two composite rollers needs to be reduced. In implementation, a drive unit can be used to drive the two composite rollers to move towards each other to prevent the electrode, separator, etc., from becoming loose or uneven. If the current pressure is greater than the second pressure threshold, it indicates that the current pressure is too high, and the distance between the two composite rollers needs to be increased. In implementation, a drive unit can be used to drive the two composite rollers to move away from each other to prevent the electrode, separator, etc., from becoming deformed or wrinkled. During the driving of the two composite rollers, the pressure between the two composite rollers is detected in real time by the pressure sensing component until the pressure detected by the pressure sensing component is within the pressure threshold range.

[0112] In this embodiment of the disclosure, by integrating a pressure sensing component in the hot-pressing composite mechanism to detect the pressure between the two composite rollers in real time, the electrode, diaphragm, etc. are accurately pressurized, reducing the possibility of poor performance due to insufficient pressure and deformation of the electrode, diaphragm, etc. due to excessive pressure.

[0113] In some embodiments, the hot-pressing composite mechanism further includes a temperature sensing component for detecting the current temperature of the first composite roller and the current temperature of the second composite roller; the detection mechanism is further configured to adjust the current current of the detection circuit based on the current temperature of the target composite roller, so that the temperature of the target composite roller is within the temperature threshold range, if the current temperature of the target composite roller is not within the temperature threshold range.

[0114] Here, the temperature sensing component can be any suitable mechanism capable of temperature detection, such as a temperature sensor. In some embodiments, the temperature sensing component can be disposed within the composite component to detect the temperature of two composite rollers. In some embodiments, the number of temperature sensing components can be at least one, and the number of temperature sensing components is adapted to the number of composite rollers. For example, a composite roller may include at least one temperature sensing component. For example, the number of temperature sensing components may be one, used to detect the temperature at a certain location on the composite roller. For example, the number of temperature sensing components may be two, each used to detect the temperature at each end of the composite roller, to ensure that the temperature deviation at each end of the composite roller is not too large, thereby improving the accuracy of temperature control.

[0115] The target composite roll may include at least one of the following: a first composite roll and a second composite roll.

[0116] The temperature threshold range can be any suitable range. In some embodiments, the temperature threshold range may include a first temperature threshold and a second temperature threshold, where the first temperature threshold is less than the second temperature threshold. In some embodiments, if the current temperature is less than the first temperature threshold, it indicates that the current temperature is too low and the current needs to be increased; in practice, the current detection voltage can be increased to increase the current. If the current temperature is greater than the second temperature threshold, it indicates that the current temperature is too high and the current needs to be decreased; in practice, the current detection voltage can be decreased to decrease the current. During the current adjustment process, the temperature of the composite roller is detected in real time by the temperature sensing component until the temperature detected by the temperature sensing component falls within the temperature threshold range.

[0117] In this embodiment of the disclosure, by integrating a temperature sensing component into the hot-pressing composite mechanism to detect the temperature of the two composite rollers in real time, the electrode sheet, diaphragm, etc. are accurately heated, reducing the possibility of poor performance due to excessively low temperature or poor insulation performance of the diaphragm due to excessively high temperature.

[0118] Figure 3 This is a schematic diagram of the composition structure of a hot-pressing composite mechanism provided in an embodiment of this disclosure, as shown below. Figure 3As shown, the hot-pressing composite mechanism includes a first composite roller 131, a first driving member 133, a first displacement sensing component 135, a first pressure sensing component 137, a first temperature sensing component 139, a second composite roller 132, a second driving member 134, a second displacement sensing component 136, a second pressure sensing component 138, and a second temperature sensing component 1310. The first composite roller 131 includes a first heating element 1311, and the second composite roller 132 includes a second heating element 1321.

[0119] The first driving element 133 is used to drive the first composite roller 131 to move;

[0120] The second drive element 134 is used to drive the second composite roller 132 to move;

[0121] The first displacement sensing component 135 and the second displacement sensing component 136 are both used to detect the distance between the first composite roller 131 and the second composite roller 132.

[0122] The first pressure sensing component 137 and the second pressure sensing component 138 are both used to detect the pressure between the first composite roller 131 and the second composite roller 132.

[0123] There are two first temperature sensing components 139, which are used to detect the temperature at both ends of the first composite roller 131 respectively;

[0124] There are two second temperature sensing components 1310, which are used to detect the temperature at both ends of the second composite roller 132 respectively;

[0125] The first heating element 1311 is used to heat the first composite roller 131 based on the current of the detection circuit;

[0126] The second heating element 1321 is used to heat the second composite roller 132 based on the current of the detection circuit.

[0127] The hot-pressed composite strip is formed from a target electrode and a target separator. The length of this hot-pressed composite strip is much shorter than the length of a battery cell. This hot-pressed composite strip may include, but is not limited to, at least one of the following: a first hot-pressed composite strip, a second hot-pressed composite strip, a third hot-pressed composite strip, a fourth hot-pressed composite strip, a fifth hot-pressed composite strip, and a sixth hot-pressed composite strip. The first hot-pressed composite strip is formed by hot-pressing and bonding the current first electrode, the current first separator, the current second electrode, and the current second separator. The second hot-pressed composite strip is formed by hot-pressing and bonding the current first electrode and the current first separator. The third hot-pressed composite strip is formed by hot-pressing and bonding the current second electrode and the current second separator. The fourth hot-pressed composite strip is formed by hot-pressing and bonding the second and third hot-pressed composite strips. The fifth hot-pressed composite strip is formed by hot-pressing and bonding the current first electrode, the current first separator, and the current second electrode. The sixth hot-pressed composite strip is formed by hot-pressing and bonding the fifth hot-pressed composite strip and the current second separator.

[0128] For example, the hot-pressed composite strip includes a first hot-pressed composite strip. As another example, the hot-pressed composite strip includes a second and a third hot-pressed composite strip. Yet another example, the hot-pressed composite strip includes a second, a third, and a fourth hot-pressed composite strip. Still another example, the hot-pressed composite strip includes a fourth and a fifth hot-pressed composite strip.

[0129] The testing mechanism (including other testing mechanisms mentioned below) can be any suitable mechanism capable of performing testing functions. For example, a current detection device, a resistance detection device, etc. In some embodiments, the number of the testing mechanism can be at least one. The testing structure includes at least a testing terminal and a testing instrument. The number of testing terminals can be at least two, and the testing instrument (including other testing instruments mentioned below) can be any suitable instrument capable of performing testing functions, such as a current detector, a resistance detector, etc. For example, the testing mechanism includes a first testing terminal and a second testing terminal. The first testing terminal is connected to the first composite roller, and the second testing terminal is connected to the second composite roller, forming a circuit between the first testing terminal, the first composite roller, the hot-pressed composite strip, the second composite roller, the second testing terminal, and the testing instrument.

[0130] The test results may include, but are not limited to, a first test result and a second test result. The first test result indicates that the hot-pressed composite strip has no defects. The second test result indicates that the hot-pressed composite strip has defects, such as broken electrode strips, ruptured electrode strips, or punctured diaphragms.

[0131] In some implementations, the determination of the detection result may include, but is not limited to, current, resistance, etc. The resistance is determined based on the current and the detection voltage, which is determined based on the diaphragm. In practice, different diaphragms may have different withstand penetration voltages due to their different materials. The determination of the resistance may include, but is not limited to, the ratio between the detection voltage and the current, or a weighted average of that ratio.

[0132] For example, if the current is within the current threshold range, the first detection result is taken as the detection result of the hot-pressed composite strip; if the current is not within the current threshold range, the second detection result is taken as the detection result of the hot-pressed composite strip. In implementation, if the detection circuit is in a normal state, the current should be within the current threshold range; if the detection circuit is in an open circuit state (e.g., due to electrode breakage), the current will be less than the minimum current (i.e., the minimum value of the current threshold range); if the detection circuit is in a short circuit state (e.g., due to diaphragm puncture causing short circuit between the anode and cathode), the current will be larger and exceed the maximum current (i.e., the maximum value of the current threshold range).

[0133] For example, if the resistance is within the resistance threshold range, the first detection result is taken as the detection result of the hot-pressed composite strip; if the resistance is not within the resistance threshold range, the second detection result is taken as the detection result of the hot-pressed composite strip. In implementation, if the detection circuit is in a normal state, the resistance should be within the resistance threshold range; if the detection circuit is in an open circuit state (e.g., due to a broken electrode strip), the resistance will be much greater than the maximum resistance (i.e., the maximum value of the resistance threshold range); if the detection circuit is in a short circuit state (e.g., due to a diaphragm puncture causing a short circuit between the anode and cathode), the resistance will be relatively small, much smaller than the minimum resistance (i.e., the minimum value of the resistance threshold range).

[0134] In some embodiments, the detection mechanism or winding equipment also includes a prompting device. This prompting device can be any suitable device, such as an indicator light, a buzzer, etc. In practice, if the detection result of the hot-pressed composite strip is the second detection result, the prompting device will provide a notification so that staff can handle the situation promptly.

[0135] The winding mechanism (including other winding mechanisms mentioned below) can be any suitable mechanism capable of performing the winding function. In some embodiments, the winding mechanism may include a winding shaft that winds the hot-pressed composite strip when rotating about its central axis. In some embodiments, the winding mechanism may be a hollow structure, a solid structure, etc. The cross-section of the winding mechanism can be any suitable shape, such as circular, elliptical, square, etc. In some embodiments, several turns of separator may be wound before winding the electrode sheets to improve the insulation effect of the cell.

[0136] In some embodiments, the winding mechanism further includes a spare winding shaft and a tape receiving device. The tape receiving device is used to cut and wind the unwound hot-pressed composite material tape onto the spare winding shaft after the winding shaft has finished winding. In this way, automatic winding and material receiving is achieved through the tape receiving device, thereby improving winding efficiency.

[0137] In some embodiments, the winding device 10 further includes a cutting mechanism located upstream of the hot-pressing composite mechanism, for cutting the next electrode released by the target electrode unwinding mechanism if the detection result of the hot-pressing composite strip is a second detection result.

[0138] Here, the cutting mechanism (including other cutting mechanisms mentioned later) can be any suitable mechanism capable of performing the cutting function. For example, a cutter, a cutting head, etc. This cutting mechanism is located upstream of the hot-pressing composite mechanism and downstream of the electrode unwinding mechanism. It is mainly used to promptly cut the next electrode (including the next first electrode and the next second electrode) when defects such as strip breakage or short circuits occur in the hot-pressed composite strip. The next electrode refers to the electrode released by the electrode unwinding mechanism after the current electrode. In some embodiments, this cutting mechanism is also used to cut the electrode when the entire cell is normally wound to facilitate the formation of the next cell.

[0139] The target electrode unwinding mechanism may include at least one of a first electrode unwinding mechanism and a second electrode unwinding mechanism. For example, when the hot-pressed composite strip includes a first hot-pressed composite strip, a fourth hot-pressed composite strip, a fifth hot-pressed composite strip, and a sixth hot-pressed composite strip, the target electrode unwinding mechanism may include a first electrode unwinding mechanism and a second electrode unwinding mechanism. As another example, when the hot-pressed composite strip includes a second hot-pressed composite strip, the target electrode unwinding mechanism may include a first electrode unwinding mechanism. Yet another example, when the hot-pressed composite strip includes a third hot-pressed composite strip, the target electrode unwinding mechanism may include a second electrode unwinding mechanism.

[0140] In some embodiments, if the anode electrode needs to be continuously wound during the winding process, the target electrode unwinding mechanism can be an electrode unwinding mechanism for releasing the cathode electrode; if the cathode electrode needs to be continuously wound, the target electrode unwinding mechanism can be an electrode unwinding mechanism for releasing the anode electrode.

[0141] In some embodiments, the number of cutting mechanisms can be at least one. In practice, the number of cutting mechanisms can be adapted to the number of electrode unwinding mechanisms. For example, one cutting mechanism can be used to cut both the next first electrode and the next second electrode. Alternatively, two cutting mechanisms can be used, one cutting the next first electrode and the other cutting the next second electrode. This allows for the cutting of different electrodes using different cutting mechanisms, improving the targeting and accuracy of the cutting process.

[0142] In this embodiment, on the one hand, the integration of a cutting mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving its versatility and adaptability; on the other hand, when there are defects in the hot-pressed composite strip, the next electrode sheet is cut off in time, improving the targeted nature of the electrode sheet cutting process. At the same time, compared with scrapping the entire battery cell, only a portion of the battery cell is scrapped, achieving the purpose of saving materials, thereby reducing the manufacturing cost of the battery and improving the productivity of the equipment.

[0143] In some embodiments, the winding device 10 further includes a receiving mechanism, a first receiving mechanism located upstream of the cutting mechanism, for connecting the cut next electrode sheet to the winding mechanism.

[0144] Here, the receiving mechanism (including other receiving mechanisms mentioned later) can be any suitable mechanism capable of receiving materials. This receiving mechanism is located upstream of the cutting mechanism and downstream of the electrode unwinding mechanism. For example, a receiving plate. This receiving plate is mainly used to limit and guide the electrode to the winding mechanism. In implementation, after the cutting mechanism cuts off the next electrode, the receiving mechanism is used to receive the next electrode (including the next first electrode and / or the next second electrode) onto the winding mechanism.

[0145] In some implementations, the number of receiving mechanisms can be at least one. In practice, the number of receiving mechanisms can be adapted to the number of cutting mechanisms. For example, if there are two cutting mechanisms, then there can also be two receiving mechanisms. This allows for the use of different receiving mechanisms to receive different next-stage electrodes into the winding mechanism, improving the targeting and accuracy of the receiving process.

[0146] In this embodiment, on the one hand, the integration of a receiving mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving the versatility and adaptability of the winding equipment; on the other hand, after cutting off the next electrode sheet, the receiving mechanism is used to promptly receive the electrode sheet, ensuring the normal operation of product production and meeting the production requirements of high timeliness and high efficiency.

[0147] In this embodiment, firstly, a hot-pressing composite mechanism and a detection mechanism are integrated into the winding equipment. Detection is performed simultaneously with the hot-pressing composite, realizing the concurrent execution of these two processes. Compared to hot-pressing composite first, then winding, and finally detection, this approach reduces the time spent on each independent process, improving production efficiency and thus increasing equipment productivity. Furthermore, it improves detection effectiveness, reducing the possibility of defects going undetected due to pressure or temperature reduction between the electrode and separator, the electrode and foreign matter (e.g., burrs, particles, dust), or the separator and foreign matter. Secondly, during the hot-pressing composite process, the hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator. This ensures sufficient compression and heating of foreign matter, enabling accurate detection of the impact of foreign matter on the battery cell and reducing missed detections and false positives. This process reduces the likelihood of defective cells being released, ensuring battery heat dissipation and lifespan. Furthermore, the hot-pressing composite mechanism pre-presses the target separator and electrode, reducing the possibility of deformation, loosening, or wrinkling in the hot-pressed composite strip, thus improving its quality. Secondly, the detection circuit formed between the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip effectively detects short circuits caused by foreign objects piercing the electrode or separator, improving detection accuracy and comprehensiveness, thereby enhancing product safety and reliability. Finally, the automatic detection of the hot-pressed composite strip using the current in the detection circuit improves the timeliness, accuracy, efficiency, and automation of the detection results compared to manual inspection, meeting the demands of high-efficiency and high-time-sensitivity production.

[0148] In some embodiments, when the hot-pressed composite strip includes a first hot-pressed composite strip, the hot-pressing composite mechanism includes a first hot-pressing composite mechanism, the detection mechanism includes a first detection mechanism, and the detection circuit includes a first detection circuit. The first hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, the current second electrode, and the current second diaphragm to form the first hot-pressed composite strip; the first detection mechanism is used to determine the detection result of the first hot-pressed composite strip based on the current current of the first detection circuit, and the first detection circuit includes the first detection mechanism, the first hot-pressing composite mechanism, and the first hot-pressed composite strip.

[0149] Here, the first hot-pressing composite mechanism is used to achieve a four-in-one composite of the current first electrode, the current first diaphragm, the current second electrode, and the current second diaphragm. The test results of the first hot-pressing composite strip may include, but are not limited to, first test results, second test results, etc.

[0150] Figure 4 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 3 ,like Figure 4As shown, the winding equipment includes an anode unwinding mechanism 11A (corresponding to the aforementioned first electrode unwinding mechanism), a cathode unwinding mechanism 11B (corresponding to the aforementioned second electrode unwinding mechanism), an upper diaphragm unwinding mechanism 12A (corresponding to the aforementioned first diaphragm unwinding mechanism), a lower diaphragm unwinding mechanism 12B (corresponding to the aforementioned second diaphragm unwinding mechanism), a first hot-pressing composite mechanism, a first detection mechanism, a winding mechanism 15, a first cutting mechanism 161, a second cutting structure 162, a first receiving mechanism 171, a second receiving mechanism 172, a first drive roller 18A, a second drive roller 18B, a third drive roller 18C, and a fourth drive roller 18D, wherein:

[0151] The number of first drive rollers 18A can be at least one, used to drive the transmission of the anode electrode sheet;

[0152] The number of second drive rollers 18B can be at least one, used to drive the transmission of the cathode electrode sheet;

[0153] The number of third drive rollers 18C can be at least one, used to drive the transmission of the upper diaphragm (corresponding to the aforementioned first diaphragm);

[0154] The number of fourth drive rollers 18D can be at least one, used to drive the transmission of the lower diaphragm (corresponding to the aforementioned second diaphragm);

[0155] The first hot-pressing composite mechanism includes a third composite roller 13A1, a fourth composite roller 13A2, a third drive component 13A3 and a fourth drive component 13A4. The first hot-pressing composite mechanism is used to hot-press the current anode electrode, the current upper diaphragm, the current cathode electrode and the current lower diaphragm to form a first hot-pressing composite strip.

[0156] The third drive unit 13A3 is used to drive the third composite roller 13A1 to move to the surface of the current anode electrode to perform hot pressing on the electrode and the diaphragm;

[0157] The fourth drive element 13A4 is used to drive the fourth composite roller 13A2 to move to the surface that is in contact with the current lower diaphragm in order to hot press the electrode and the diaphragm.

[0158] The first detection mechanism includes a first detection terminal 14A1, a second detection terminal 14A2 and a first detection instrument 14A3. The first detection terminal 14A1 is connected to the third composite roller 13A1, and the second detection terminal 14A2 is connected to the fourth composite roller 13A2.

[0159] The first detector 14A3 is used to determine the resistance of the first hot-pressed composite strip based on the current current of the first detection circuit; and to determine the detection result of the first hot-pressed composite strip based on the resistance of the first hot-pressed composite strip; the first detection circuit includes the first detection terminal 14A1, the third composite roller 13A1, the first hot-pressed composite strip, the fourth composite roller 13A2, the second detection terminal 14A2, and the first detector 14A3;

[0160] The winding mechanism 15 is used to wind the first hot-pressed composite strip;

[0161] The first cutting mechanism 161 is used to cut off the next anode sheet released by the anode sheet unwinding mechanism 11A when the detection result of the first hot-pressed composite strip indicates that the first hot-pressed composite strip has a defect, or when the current cell winding is completed.

[0162] The first receiving mechanism 171 is used to receive the next anode sheet released by the anode sheet unwinding mechanism 11A onto the winding mechanism 15 after the first cutting mechanism 161 cuts the next anode sheet.

[0163] The second cutting mechanism 162 is used to cut off the next cathode electrode released by the cathode electrode unwinding mechanism 11B when the detection result of the first hot-pressed composite strip indicates that the first hot-pressed composite strip has a defect or when the current cell winding is completed.

[0164] The second receiving mechanism 172 is used to receive the next cathode electrode released by the cathode electrode unwinding mechanism 11B onto the winding mechanism 13 after the second cutting mechanism 162 cuts the next cathode electrode.

[0165] In this embodiment, on the one hand, before winding, the first electrode, the first separator, the second electrode, and the second separator are pre-pressed together by a first hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, or wrinkling of the first hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the electrode and separator are continuously pressurized and heated by the first hot-pressing composite mechanism, so as to fully compress and heat the foreign matter, accurately detect whether puncture has occurred between the electrode and the separator, reduce the possibility of missed detection or false detection, thereby reducing the possibility of defective cells flowing out, and ensuring the heat dissipation and service life of the battery.

[0166] In some embodiments, when the hot-pressed composite strip includes a second hot-pressed composite strip, the hot-pressing composite mechanism includes a second hot-pressing composite mechanism, the detection mechanism includes a second detection mechanism, and the detection circuit includes a second detection circuit. The second hot-pressing composite mechanism is used for hot-pressing composite of the current first electrode and the current first diaphragm to form a second hot-pressed composite strip; the second detection mechanism is used to determine the detection result of the second hot-pressed composite strip based on the current current of the second detection circuit, and the second detection circuit includes the second detection mechanism, the second hot-pressing composite mechanism, and the second hot-pressed composite strip; and / or, when the hot-pressed composite strip includes a third hot-pressed composite strip, the hot-pressing composite mechanism includes a third hot-pressing composite mechanism, the detection mechanism includes a third detection mechanism, and the detection circuit includes a third detection circuit. The third hot-pressing composite mechanism is used for hot-pressing composite of the current second electrode and the current second diaphragm to form a third hot-pressed composite strip; the third detection mechanism is used to determine the detection result of the third hot-pressed composite strip based on the current current of the third detection circuit, and the third detection circuit includes the third detection mechanism, the third hot-pressing composite mechanism, and the third hot-pressed composite strip.

[0167] Here, the second hot-pressing composite mechanism is used to achieve a two-in-one composite between the current first electrode and the current first diaphragm. The test results of the second hot-pressing composite strip may include, but are not limited to, the first test result and the second test result.

[0168] The third hot-pressing composite mechanism is used to achieve a two-in-one composite between the current second electrode and the current second diaphragm. The test results of the third hot-pressing composite strip may include, but are not limited to, the first test result and the second test result.

[0169] In some embodiments, when the hot-pressed composite strip includes a second hot-pressed composite strip, the winding mechanism is used to wind the second hot-pressed composite strip, the current cathode electrode, and the current lower diaphragm; when the hot-pressed composite strip includes a third hot-pressed composite strip, the winding mechanism is used to wind the current anode electrode, the current upper diaphragm, and the third hot-pressed composite strip; when the hot-pressed composite strip includes both a second and a third hot-pressed composite strip, the winding mechanism is used to wind both the second and third hot-pressed composite strips.

[0170] Figure 5 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 4 ,like Figure 5As shown, the winding equipment includes an anode unwinding mechanism 11A, a cathode unwinding mechanism 11B, an upper diaphragm unwinding mechanism 12A, a lower diaphragm unwinding mechanism 12B, a second hot-pressing composite mechanism, a third hot-pressing composite mechanism, a second detection mechanism, a third detection mechanism, a winding mechanism 15, a first cutting mechanism 161, a second cutting mechanism 162, a first receiving mechanism 171, a second receiving mechanism 172, a first drive roller 18A, a second drive roller 18B, a third drive roller 18C, and a fourth drive roller 18D, wherein:

[0171] The second hot-pressing composite mechanism includes a fifth composite roller 13B1, a sixth composite roller 13B2, a fifth drive element 13B3 and a sixth drive element 13B4. The second hot-pressing composite mechanism is used to hot-press the current anode electrode and the current upper diaphragm to form a second hot-pressing composite strip.

[0172] The fifth drive element 13B3 is used to drive the fifth composite roller 13B1 to move to the surface that is in contact with the current anode electrode to perform hot pressing on the electrode and the diaphragm;

[0173] The sixth drive element 13B4 is used to drive the sixth composite roller 13B2 to move to the surface that is in contact with the current upper diaphragm in order to hot press the electrode and the diaphragm.

[0174] The second detection mechanism includes a third detection terminal 14B1, a fourth detection terminal 14B2, and a second detector 14B3. The third detection terminal 14B1 is connected to the fifth composite roller 13B1, and the fourth detection terminal 14B2 is connected to the sixth composite roller 13B2.

[0175] The second detector 14B3 is used to determine the resistance of the second hot-pressed composite strip based on the current current of the second detection circuit; and to determine the detection result of the second hot-pressed composite strip based on the resistance of the second hot-pressed composite strip; the second detection circuit includes the third detection terminal 14B1, the fifth composite roller 13B1, the second hot-pressed composite strip, the sixth composite roller 13B2, the fourth detection terminal 14B2, and the second detector 14B3;

[0176] The third hot-pressing composite mechanism includes a seventh composite roller 13C1, an eighth composite roller 13C2, a seventh drive component 13C3, and an eighth drive component 13C4. The third hot-pressing composite mechanism is used to hot-press the current cathode electrode and the current lower diaphragm to form a third hot-pressing composite strip.

[0177] The seventh drive element 13C3 is used to drive the seventh composite roller 13C1 to move to the surface of the current cathode electrode to perform hot pressing on the electrode and the diaphragm;

[0178] The eighth drive unit 13C4 is used to drive the eighth composite roller 13C2 to move to the surface that is in contact with the current lower diaphragm in order to hot press the electrode and the diaphragm.

[0179] The third detection mechanism includes a fifth detection terminal 14C1, a sixth detection terminal 14C2 and a third detection instrument 14C3. The fifth detection terminal 14C1 is connected to the seventh composite roller 13C1, and the sixth detection terminal 14C2 is connected to the eighth composite roller 13C2.

[0180] The third detector 14C3 is used to determine the resistance of the third hot-pressed composite strip based on the current current of the third detection circuit; and to determine the detection result of the third hot-pressed composite strip based on the resistance of the third hot-pressed composite strip; the third detection circuit includes the fifth detection terminal 14C1, the seventh composite roller 13C1, the third hot-pressed composite strip, the eighth composite roller 13C2, the sixth detection terminal 14C2, and the third detector 14C3;

[0181] The winding mechanism 15 is used to wind the second hot-pressed composite strip and the third hot-pressed composite strip;

[0182] The first cutting mechanism 161 is used to cut off the next anode sheet released by the anode sheet unwinding mechanism 11A when the detection result of the second hot-pressed composite strip indicates that the second hot-pressed composite strip has a defect, or when the current cell winding is completed.

[0183] The first receiving mechanism 171 is used to receive the next anode sheet released by the anode sheet unwinding mechanism 11A onto the winding mechanism 15 after the first cutting mechanism 161 cuts the next anode sheet.

[0184] The second cutting mechanism 162 is used to cut off the next cathode electrode released by the cathode electrode unwinding mechanism 11B when the detection result of the third hot-pressed composite strip indicates that the third hot-pressed composite strip has defects or when the current cell winding is completed.

[0185] The second receiving mechanism 172 is used to receive the next cathode electrode released by the cathode electrode unwinding mechanism 11B onto the winding mechanism 15 after the second cutting mechanism 162 cuts the next cathode electrode.

[0186] In this embodiment, on the one hand, before winding, the current first electrode and the current first separator are pre-pressed together by a second hot-pressing composite mechanism and / or the current second electrode and the current second separator are pre-pressed together by a third hot-pressing composite mechanism. This reduces the possibility of deformation, loosening, wrinkling, etc., of the second hot-pressed composite strip and / or the third hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the electrode and separator are continuously pressurized and heated by the second hot-pressing composite mechanism and by the third hot-pressing composite mechanism. This achieves sufficient compression and heating of foreign matter, enabling accurate detection of whether punctures have occurred between the current first electrode and the current first separator, or between the current second electrode and the current second separator. This not only improves the comprehensiveness of the detection but also reduces the possibility of missed detections and false detections, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0187] In some embodiments, when the hot-pressed composite strip also includes a fourth hot-pressed composite strip, the hot-pressing composite mechanism further includes a fourth hot-pressing composite mechanism, the detection mechanism further includes a fourth detection mechanism, and the detection circuit further includes a fourth detection circuit. The fourth hot-pressing composite mechanism is used to hot-press the second hot-pressed composite strip and the third hot-pressed composite strip to form the fourth hot-pressed composite strip. The fourth detection mechanism is used to determine the detection result of the fourth hot-pressed composite strip based on the current of the fourth detection circuit. The fourth detection circuit includes the fourth detection mechanism, the fourth hot-pressing composite mechanism, and the fourth hot-pressed composite strip.

[0188] Here, the fourth hot-pressing composite mechanism is used to hot-press the second and third hot-pressing composite strips. The test results of the fourth hot-pressing composite strip may include, but are not limited to, the first test result and the second test result. The winding mechanism is used to wind the fourth hot-pressing composite strip.

[0189] Figure 6 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 5 ,like Figure 6 As shown, the winding equipment includes an anode unwinding mechanism 11A, a cathode unwinding mechanism 11B, an upper diaphragm unwinding mechanism 12A, a lower diaphragm unwinding mechanism 12B, a second hot-pressing composite mechanism, a third hot-pressing composite mechanism, a fourth hot-pressing composite mechanism, a second detection mechanism, a third detection mechanism, a fourth detection mechanism, a winding mechanism 15, a first cutting mechanism 161, a second cutting mechanism 162, a first receiving mechanism 171, a second receiving mechanism 172, a first drive roller 18A, a second drive roller 18B, a third drive roller 18C, and a fourth drive roller 18D, wherein:

[0190] The second hot-pressing composite mechanism includes a fifth composite roller 13B1, a sixth composite roller 13B2, a fifth drive element 13B3 and a sixth drive element 13B4. The second hot-pressing composite mechanism is used to hot-press the current anode electrode and the current upper diaphragm to form a second hot-pressing composite strip.

[0191] The second detection mechanism includes a third detection terminal 14B1, a fourth detection terminal 14B2, and a second detector 14B3. The third detection terminal 14B1 is connected to the fifth composite roller 13B1, and the fourth detection terminal 14B2 is connected to the sixth composite roller 13B2. The second detector 14B3 is used to determine the resistance of the second hot-pressed composite strip based on the current current of the second detection circuit, and to determine the detection result of the second hot-pressed composite strip based on its resistance. The second detection circuit includes the third detection terminal 14B1, the fifth composite roller 13B1, the second hot-pressed composite strip, the sixth composite roller 13B2, the fourth detection terminal 14B2, and the second detector 14B3.

[0192] The third hot-pressing composite mechanism includes a seventh composite roller 13C1, an eighth composite roller 13C2, a seventh drive component 13C3, and an eighth drive component 13C4. The third hot-pressing composite mechanism is used to hot-press the current cathode electrode and the current lower diaphragm to form a third hot-pressing composite strip. The third detection circuit includes the fifth detection terminal 14C1, the seventh composite roller 13C1, the third hot-pressing composite strip, the eighth composite roller 13C2, the sixth detection terminal 14C2, and the third detector 14C3.

[0193] The third testing mechanism includes a fifth testing terminal 14C1, a sixth testing terminal 14C2, and a third testing instrument 14C3. The fifth testing terminal 14C1 is connected to the seventh composite roller 13C1, and the sixth testing terminal 14C2 is connected to the eighth composite roller 13C2. The third testing instrument 14C3 is used to determine the resistance of the third hot-pressed composite strip based on the current current of the third testing circuit, and to determine the testing result of the third hot-pressed composite strip based on its resistance.

[0194] The fourth hot-pressing composite mechanism includes a ninth composite roller 13D1, a tenth composite roller 13D2, a ninth drive component 13D3, and a tenth drive component 13D4, which are used to hot-press the second hot-pressing composite strip and the third hot-pressing composite strip to form the fourth hot-pressing composite strip.

[0195] The ninth driving component 13D3 is used to drive the ninth composite roller 13D1 to move to the surface of the second hot-pressed composite strip to perform hot pressing on the hot-pressed composite strip.

[0196] The tenth drive component 13D4 is used to drive the tenth composite roller 13D2 to move to the other surface of the third hot-pressed composite strip to hot-press the hot-pressed composite strip.

[0197] The fourth detection mechanism includes a seventh detection terminal 14D1, an eighth detection terminal 14D2 and a fourth detection instrument 14D3. The seventh detection terminal 14D1 is connected to the ninth composite roller 13D1, and the eighth detection terminal 14D2 is connected to the tenth composite roller 13D2.

[0198] The fourth detector 14D3 is used to determine the resistance of the fourth hot-pressed composite strip based on the current current of the fourth detection circuit; and to determine the detection result of the fourth hot-pressed composite strip based on the resistance of the fourth hot-pressed composite strip; the fourth detection circuit includes the seventh detection terminal 14D1, the ninth composite roller 13D1, the fourth hot-pressed composite strip, the tenth composite roller 13D2, the eighth detection terminal 14D2, and the fourth detector 14D3;

[0199] The winding mechanism 15 is used to wind the fourth hot-pressed composite strip;

[0200] The first cutting mechanism 161 is used to cut off the next anode sheet released by the anode sheet unwinding mechanism 11A when the detection result of the second hot-pressed composite strip indicates that the second hot-pressed composite strip has a defect, the current cell winding is completed, or the detection result of the fourth hot-pressed composite strip indicates that the fourth hot-pressed composite strip has a defect.

[0201] The first receiving mechanism 171 is used to receive the next anode sheet released by the anode sheet unwinding mechanism 11A onto the winding mechanism 15 after the first cutting mechanism 161 cuts the next anode sheet.

[0202] The second cutting mechanism 162 is used to cut off the next cathode electrode released by the cathode electrode unwinding mechanism 11B when the detection result of the third hot-pressed composite strip indicates that the third hot-pressed composite strip has a defect, the current cell winding is completed, or the detection result of the fourth hot-pressed composite strip indicates that the fourth hot-pressed composite strip has a defect.

[0203] The second receiving mechanism 172 is used to receive the next cathode electrode released by the cathode electrode unwinding mechanism 11B onto the winding mechanism 15 after the second cutting mechanism 162 cuts the next cathode electrode.

[0204] In this embodiment, on the one hand, before winding, the second and third hot-pressed composite strips are pre-hot-pressed together by a fourth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, and wrinkling of the fourth hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip. On the other hand, during the hot-pressing composite process, the fourth hot-pressing composite mechanism continuously applies pressure and heat to the hot-pressed composite strip, achieving sufficient extrusion and heating of foreign matter, and further detecting whether puncture has occurred between the electrode and the separator. This not only improves the comprehensiveness of the detection, but also further reduces the possibility of missed detection and false detection after multiple hot-pressing processes, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0205] In some embodiments, when the hot-pressed composite strip includes a fifth hot-pressed composite strip, the hot-pressing composite mechanism includes a fifth hot-pressing composite mechanism, the detection mechanism includes a fifth detection mechanism, and the detection circuit includes a fifth detection circuit. The fifth hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, and the current second electrode to form a fifth hot-pressed composite strip. The fifth detection mechanism is used to determine the detection result of the fifth hot-pressed composite strip based on the current current of the fifth detection circuit. The fifth detection circuit includes the fifth detection mechanism, the fifth hot-pressing composite mechanism, and the fifth hot-pressed composite strip.

[0206] Here, the fifth hot-pressing composite mechanism is used to achieve a three-in-one composite of the current first electrode, the current first diaphragm, and the current second electrode. The test results of the fifth hot-pressing composite strip may include, but are not limited to, the first test result and the second test result. The winding mechanism is used to wind the fifth hot-pressing composite strip and the current lower diaphragm.

[0207] Figure 7 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 6 ,like Figure 7 As shown, the winding equipment includes an anode unwinding mechanism 11A, a cathode unwinding mechanism 11B, an upper diaphragm unwinding mechanism 12A, a lower diaphragm unwinding mechanism 12B, a fifth hot-pressing composite mechanism, a fifth detection mechanism, a winding mechanism 15, a first cutting mechanism 161, a second cutting mechanism 162, a first receiving mechanism 171, a second receiving mechanism 172, a first drive roller 18A, a second drive roller 18B, a third drive roller 18C, and a fourth drive roller 18D, wherein:

[0208] The fifth hot-pressing composite mechanism includes an eleventh composite roller 13E1, a twelfth composite roller 13E2, an eleventh drive component 13E3, and a twelfth drive component 13E4, which are used to hot-press the current anode electrode, the current upper diaphragm, and the current cathode electrode to form a fifth hot-pressing composite strip.

[0209] The eleventh drive unit 13E3 is used to drive the eleventh composite roller 13E1 to move to the surface of the current anode electrode to hot press the electrode and the diaphragm.

[0210] The twelfth drive element 13E4 is used to drive the twelfth composite roller 13E2 to move to the other surface of the current cathode electrode to perform hot pressing on the electrode and the diaphragm;

[0211] The fifth detection mechanism includes a ninth detection terminal 14E1, a tenth detection terminal 14E2 and a fifth detection instrument 14E3. The ninth detection terminal 14E1 is connected to the eleventh composite roller 13E1, and the tenth detection terminal 14E2 is connected to the twelfth composite roller 13E2.

[0212] The fifth detector 14E3 is used to determine the resistance of the fifth hot-pressed composite strip based on the current current of the fifth detection circuit; and to determine the detection result of the fifth hot-pressed composite strip based on its resistance; the fifth detection circuit includes the ninth detection terminal 14E1, the eleventh composite roller 13E1, the fifth hot-pressed composite strip, the twelfth composite roller 13E2, the tenth detection terminal 14E2, and the fifth detector 14E3;

[0213] Winding mechanism 15 is used to wind the fifth hot-pressed composite strip and the current lower diaphragm;

[0214] The first cutting mechanism 161 is used to cut off the next anode electrode released by the anode electrode unwinding mechanism 11A when the detection result of the fifth hot-pressed composite strip indicates that the fifth hot-pressed composite strip has defects, or when the current cell winding is completed.

[0215] The first receiving mechanism 171 is used to receive the next anode sheet released by the anode sheet unwinding mechanism 11A onto the winding mechanism 15 after the first cutting mechanism 161 cuts the next anode sheet.

[0216] The second cutting mechanism 162 is used to cut off the next cathode electrode released by the cathode electrode unwinding mechanism 11B when the detection result of the fifth hot-pressed composite strip indicates that the fifth hot-pressed composite strip has a defect or when the current cell winding is completed.

[0217] The second receiving mechanism 172 is used to receive the next cathode electrode released by the cathode electrode unwinding mechanism 11B onto the winding mechanism 15 after the second cutting mechanism 162 cuts the next cathode electrode.

[0218] In this embodiment, on the one hand, before winding, the current first electrode, the current first separator, and the current second electrode are pre-pressed together by a fifth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, or wrinkling of the fifth hot-pressing composite strip, thereby improving the quality of the hot-pressing composite strip. On the other hand, during the hot-pressing composite process, the fifth hot-pressing composite mechanism continuously applies pressure and heat to the electrode, separator, etc., to achieve sufficient extrusion and heating of foreign objects, which can accurately detect whether puncture has occurred between the electrode and the separator, reducing the possibility of missed detection or false detection, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0219] In some embodiments, when the hot-pressed composite strip also includes a sixth hot-pressed composite strip, the hot-pressing composite mechanism further includes a sixth hot-pressing composite mechanism, the detection mechanism further includes a sixth detection mechanism, and the detection circuit further includes a sixth detection circuit. The sixth hot-pressing composite mechanism is used to hot-press the fifth hot-pressed composite strip and the current second diaphragm to form the sixth hot-pressed composite strip; the sixth detection mechanism is used to determine the detection result of the sixth hot-pressed composite strip based on the current current of the sixth detection circuit. The sixth detection circuit includes the sixth detection mechanism, the sixth hot-pressing composite mechanism, and the sixth hot-pressed composite strip.

[0220] Here, the sixth hot-pressing composite mechanism is used to achieve hot-pressing composite between the fifth hot-pressing composite strip and the current second diaphragm. The test results of the sixth hot-pressing composite strip may include, but are not limited to, the first test result, the second test result, etc. The winding mechanism is used to wind the sixth hot-pressing composite strip.

[0221] Figure 8 A schematic diagram of the composition structure of a winding device provided in this embodiment of the present disclosure. Figure 6 ,like Figure 8 As shown, the winding equipment includes an anode unwinding mechanism 11A, a cathode unwinding mechanism 11B, an upper diaphragm unwinding mechanism 12A, a lower diaphragm unwinding mechanism 12B, a fifth hot-pressing composite mechanism, a sixth hot-pressing composite mechanism, a fifth detection mechanism, a sixth detection mechanism, a winding mechanism 15, a first cutting mechanism 161, a second cutting mechanism 162, a first receiving mechanism 171, a second receiving mechanism 172, a first drive roller 18A, a second drive roller 18B, a third drive roller 18C, and a fourth drive roller 18D, wherein:

[0222] The fifth hot-pressing composite mechanism includes an eleventh composite roller 13E1, a twelfth composite roller 13E2, an eleventh drive component 13E3, and a twelfth drive component 13E4, which are used to hot-press the current anode electrode, the current upper diaphragm, and the current cathode electrode to form a fifth hot-pressing composite strip.

[0223] The fifth detection mechanism includes a ninth detection terminal 14E1, a tenth detection terminal 14E2, and a fifth detection instrument 14E3. The ninth detection terminal 14E1 is connected to the eleventh composite roller 13E1, and the tenth detection terminal 14E2 is connected to the twelfth composite roller 13E2. The fifth detection instrument 14E3 is used to determine the resistance of the fifth hot-pressed composite strip based on the current current of the fifth detection circuit, and to determine the detection result of the fifth hot-pressed composite strip based on its resistance. The fifth detection circuit includes the ninth detection terminal 14E1, the eleventh composite roller 13E1, the fifth hot-pressed composite strip, the twelfth composite roller 13E2, the tenth detection terminal 14E2, and the fifth detection instrument 14E3.

[0224] The sixth hot-pressing composite mechanism includes a thirteenth composite roller 13F1, a fourteenth composite roller 13FE2, a thirteenth drive component 13F3, and a fourteenth drive component 13F4, which are used to hot-press the fifth hot-pressing composite strip and the current lower diaphragm to form the sixth hot-pressing composite strip.

[0225] The thirteenth drive component 13F3 is used to drive the thirteenth composite roller 13F1 to move to the surface of the fifth hot-pressed composite strip to hot press the fifth hot-pressed composite strip and the diaphragm.

[0226] The fourteenth drive unit 13F4 is used to drive the fourteenth composite roller 13F2 to move to the other surface of the current lower diaphragm to hot press the fifth hot-pressed composite strip and the diaphragm.

[0227] The sixth detection mechanism includes an eleventh detection terminal 14F1, a twelfth detection terminal 14F2, and a sixth detection instrument 14F3. The eleventh detection terminal 14F1 is connected to the thirteenth composite roller 13F1, and the twelfth detection terminal 14F2 is connected to the fourteenth composite roller 13F2.

[0228] The sixth detector 14F3 is used to determine the resistance of the sixth hot-pressed composite strip based on the current current of the sixth detection circuit; and to determine the detection result of the sixth hot-pressed composite strip based on its resistance; the sixth detection circuit includes the eleventh detection terminal 14F1, the thirteenth composite roller 13F1, the sixth hot-pressed composite strip, the fourteenth composite roller 13F2, the twelfth detection terminal 14F2, and the sixth detector 14F3;

[0229] Winding mechanism 15 is used to wind the sixth hot-pressed composite strip;

[0230] The first cutting mechanism 161 is used to cut off the next anode sheet released by the anode sheet unwinding mechanism 11A when the detection result of the fifth hot-pressed composite strip indicates that the fifth hot-pressed composite strip has a defect, the current cell winding is completed, or the detection result of the sixth hot-pressed composite strip indicates that the sixth hot-pressed composite strip has a defect.

[0231] The first receiving mechanism 171 is used to receive the next anode sheet released by the anode sheet unwinding mechanism 11A onto the winding mechanism 15 after the first cutting mechanism 161 cuts the next anode sheet.

[0232] The second cutting mechanism 162 is used to cut off the next cathode electrode released by the cathode electrode unwinding mechanism 11B when the detection result of the fifth hot-pressed composite strip indicates that the fifth hot-pressed composite strip has a defect, the current cell winding is completed, or the detection result of the sixth hot-pressed composite strip indicates that the sixth hot-pressed composite strip has a defect.

[0233] The second receiving mechanism 172 is used to receive the next cathode electrode released by the cathode electrode unwinding mechanism 11B onto the winding mechanism 15 after the second cutting mechanism 162 cuts the next cathode electrode.

[0234] In this embodiment, on the one hand, before winding, the fifth hot-pressed composite strip and the current second separator are pre-hot-pressed together by the sixth hot-pressing composite mechanism, which reduces the possibility of deformation, loosening, wrinkling, etc. of the sixth hot-pressed composite strip, thereby improving the quality of the hot-pressed composite strip; on the other hand, during the hot-pressing composite process, the sixth hot-pressing composite mechanism continuously pressurizes and heats the hot-pressed composite strip and the separator, so as to fully compress and heat the foreign matter, and further detect whether puncture has occurred between the electrode and the separator. This not only improves the comprehensiveness of the detection, but also further reduces the possibility of missed detection and false detection after multiple hot-pressing, thereby reducing the possibility of defective cells flowing out and ensuring the heat dissipation and service life of the battery.

[0235] Based on the above embodiments, this disclosure also provides a winding method, which is applied in a control device. Figure 9 A schematic diagram of the implementation process of a winding method provided in this embodiment of the present disclosure. Figure 1 ,like Figure 9 As shown, the winding method includes steps S21 to S23, wherein:

[0236] Step S21: Control the hot pressing composite mechanism of the winding equipment to hot press the target electrode and the target diaphragm to form a hot pressing composite strip.

[0237] Here, the winding equipment includes a first electrode unwinding mechanism, a second electrode unwinding mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a winding mechanism, a hot-pressing composite mechanism, and a testing mechanism.

[0238] The target electrode includes at least one of the following: the current first electrode released by the first electrode unwinding mechanism, and the current second electrode released by the second electrode unwinding mechanism.

[0239] The target diaphragm includes at least one of the following: the current first diaphragm released by the first diaphragm unwinding mechanism, and the current first diaphragm released by the second diaphragm unwinding mechanism.

[0240] The control device can be any suitable device capable of performing control functions, such as a host computer, a PLC, or a host computer + PLC. In some embodiments, the control device can be located within the winding equipment or can be independent of the winding equipment. The control device is communicatively connected to the winding equipment. The winding equipment can be any of the winding equipment described above.

[0241] The control device can send control signals to control the movement of the hot-pressing composite mechanism to hot-press the hot-pressing composite strip. The control signal can be any suitable signal, mainly used to control the movement of the hot-pressing composite mechanism. The applied pressure should be within the pressure threshold range, and the applied temperature should be within the temperature threshold range.

[0242] In some embodiments, the control device is also used to control the first electrode unwinding mechanism, the second electrode unwinding mechanism, the first diaphragm unwinding mechanism, the second diaphragm unwinding mechanism, etc.

[0243] The length of the hot-pressed composite strip is much shorter than the length of a battery cell; the hot-pressed composite strip refers to a portion of a battery cell.

[0244] Step S22: Determine the detection result of the hot-pressed composite strip based on the current current of the detection circuit.

[0245] Here, the detection circuit includes a detection mechanism, a hot-pressing composite mechanism, and a hot-pressing composite strip.

[0246] The test results may include, but are not limited to, a first test result and a second test result. The first test result indicates that the hot-pressed composite strip has no defects. The second test result indicates that the hot-pressed composite strip has defects, such as broken electrode strips or short circuits between the anode and cathode caused by diaphragm puncture.

[0247] The determination of the detection result may include, but is not limited to, the current, resistance, etc. The resistance is determined based on the current. For example, the detection result can be determined based on the current and a current threshold range: if the current is within the current threshold range, then the first detection result is taken as the detection result; conversely, if the current is not within the current threshold range, then the second detection result is taken as the detection result. As another example, the detection result can be determined based on the resistance and a resistance threshold range: if the resistance is within the resistance threshold range, then the first detection result is taken as the detection result; conversely, if the resistance is not within the resistance threshold range, then the second detection result is taken as the detection result.

[0248] In some implementations, the detection mechanism can transmit the current to the control device, so that the control device can determine the detection result based on the current. In practice, the detection mechanism can be communicatively connected to the control device or through the winding equipment.

[0249] Step S23: Control the winding mechanism to wind the hot-pressed composite strip.

[0250] Here, the control device can send a winding signal to control the winding mechanism to wind up the hot-pressed composite strip. This winding signal can be any suitable signal, primarily used to control the winding mechanism to wind up the strip.

[0251] In this embodiment, firstly, a hot-pressing composite mechanism and a detection mechanism are integrated into the winding equipment. Detection is performed simultaneously with the hot-pressing composite, realizing the concurrent execution of these two processes. Compared to hot-pressing composite first, then winding, and finally detection, this approach reduces the time spent on each independent process, improving production efficiency and thus increasing equipment productivity. Furthermore, it improves detection effectiveness, reducing the possibility of defects going undetected due to pressure or temperature reduction between the electrode and separator, the electrode and foreign matter (e.g., burrs, particles, dust), or the separator and foreign matter. Secondly, during the hot-pressing composite process, the hot-pressing composite mechanism continuously applies pressure and heat to the electrode and separator. This ensures sufficient compression and heating of foreign matter, enabling accurate detection of the impact of foreign matter on the battery cell and reducing missed detections and false positives. This process reduces the likelihood of defective cells being released, ensuring battery heat dissipation and lifespan. Furthermore, the hot-pressing composite mechanism pre-presses the target separator and electrode, reducing the possibility of deformation, loosening, or wrinkling in the hot-pressed composite strip, thus improving its quality. Secondly, the detection circuit formed between the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip effectively detects short circuits caused by foreign objects piercing the electrode or separator, improving detection accuracy and comprehensiveness, thereby enhancing product safety and reliability. Finally, the automatic detection of the hot-pressed composite strip using the current in the detection circuit improves the timeliness, accuracy, efficiency, and automation of the detection results compared to manual inspection, meeting the demands of high-efficiency and high-time-sensitivity production.

[0252] In some embodiments, step S22 includes steps S221 to S223, wherein:

[0253] Step S221: Determine the resistance of the hot-pressed composite strip based on the current current and current detection voltage of the detection circuit.

[0254] Here, the current detection voltage can be any suitable detection voltage, such as 50V (volts), 100V, etc. In some embodiments, the current detection voltage is determined based on the current diaphragm, and different diaphragms can correspond to different detection voltages. The current detection voltage can be provided by the detection mechanism, which can provide a suitable voltage detection range, such as 40V to 600V or 50V to 500V.

[0255] The resistance can be determined in ways including, but not limited to, the ratio between the current detected voltage and current, or a weighted average of that ratio. For example, the ratio can be used as the resistance.

[0256] Step S222: If the resistance of the hot-pressed composite strip is within the resistance threshold range, the first detection result shall be taken as the detection result of the hot-pressed composite strip.

[0257] Here, the resistance threshold range can be any suitable range, such as 1 MΩ to 1.3 MΩ. In practice, different battery cells can correspond to different resistance threshold ranges. In practice, if the detection circuit is in a normal state, the resistance should be within the resistance threshold range. Therefore, the first detection result can be used as the detection result of the hot-pressed composite strip.

[0258] Step S223: If the resistance of the hot-pressed composite strip is not within the resistance threshold range, the second detection result shall be taken as the detection result of the hot-pressed composite strip.

[0259] Here, if the detection circuit is in an open circuit state (for example, due to a broken electrode strip), the resistance will be much greater than the maximum resistance (i.e., the maximum value of the resistance threshold range). If the detection circuit is in a short circuit state (for example, due to a puncture of the diaphragm causing a short circuit between the anode and cathode), the resistance will be relatively small and much smaller than the minimum resistance (i.e., the minimum value of the resistance threshold range). In this case, the second detection result can be used as the detection result of the hot-pressed composite strip.

[0260] In this embodiment, on the one hand, determining the current detection voltage based on the target diaphragm not only improves the accuracy of the current detection voltage, but also enables compatibility with different diaphragms, enhancing versatility and adaptability, and meeting the needs of highly flexible battery cell production; on the other hand, determining the detection result based on the resistance and resistance threshold range of the hot-pressed composite strip improves the accuracy of the detection result.

[0261] In some embodiments, the hot-pressing composite mechanism includes a composite component, a driving component, and a displacement sensing assembly. The composite component includes a first composite roller and a second composite roller. The winding method further includes steps S241 to S242, wherein:

[0262] Step S241: Control the displacement sensing component to detect the current distance between the first composite roller and the second composite roller.

[0263] Here, the current distance can be any suitable distance. In some embodiments, the control device can transmit a displacement detection signal to the displacement sensing component, so that the displacement sensing component detects the current distance between the first composite roller and the second composite roller based on the displacement detection signal. The displacement detection signal can be any suitable signal used for displacement detection. This reduces the number of detections and lowers hardware consumption compared to real-time detection.

[0264] In some implementations, the displacement sensing component transmits the current distance to the control device. The displacement sensing component and the control device can communicate directly, or they can communicate through the drive unit; that is, the displacement sensing component is connected to the drive unit, and the drive unit is connected to the control device.

[0265] Step S242: Based on the current distance, control the drive unit to drive the first composite roller and the second composite roller to move, so as to reduce or increase the distance between the first composite roller and the second composite roller.

[0266] Here, the distance between the first composite roller and the second composite roller is adjusted based on the current distance. In implementation, the control device can send a corresponding drive signal to the drive member, causing the drive member to move the first and second composite rollers according to the drive signal. For example, if the current distance indicates that the composite should be moved away from the hot-pressed composite strip, the control device sends a move-away drive signal to the drive member, causing the drive member to move the first and second composite rollers in opposite directions according to the move-away drive signal, thereby increasing the distance between the first and second composite rollers; conversely, if the current distance indicates that the composite should be moved closer to the hot-pressed composite strip, the control device sends a move-close drive signal to the drive member, causing the drive member to move the first and second composite rollers towards each other according to the move-close drive signal, thereby decreasing the distance between the first and second composite rollers.

[0267] In some implementations, after the winding mechanism winds the diaphragm several times, the drive unit is controlled to drive the composite roller to move and adhere to the surface of the electrode, diaphragm, etc.

[0268] In this embodiment, firstly, the electrode and diaphragm are hot-pressed by two composite rollers, which not only reduces interference between them but also increases the hot-pressing time of the electrode and diaphragm, ensuring that the electrode and diaphragm are in a continuously compressed state and weakening the insulation performance of the diaphragm, thereby improving the efficiency of defect detection. Secondly, the distance between the two composite rollers is accurately detected by the displacement sensing component integrated in the hot-pressing composite mechanism, so as to accurately control the movement of the pressurizing component. Finally, the two composite rollers are driven in a timely manner by controlling the drive component, ensuring the normal operation of the hot-pressing composite process.

[0269] In some embodiments, the hot-pressing composite mechanism further includes a pressure-sensing component, and the winding method further includes steps S251 to S252, wherein:

[0270] Step S251: Control the pressure sensing component to detect the current pressure between the first composite roller and the second composite roller.

[0271] Here, the current pressure can be any suitable pressure. In some embodiments, the control device can transmit a pressure detection signal to the pressure sensing component, so that the pressure sensing component detects the current pressure between the first and second composite rollers based on the pressure detection signal. This pressure detection signal can be any suitable signal used for pressure detection. This reduces the number of detections and lowers hardware consumption compared to real-time detection.

[0272] In some implementations, the pressure sensing component transmits the current pressure to the control device. The pressure sensing component and the control device can communicate directly, or they can communicate through the winding equipment; that is, the pressure sensing component is connected to the winding equipment, and the winding equipment is connected to the control device.

[0273] Step S252: If the current pressure is not within the pressure threshold range, based on the current pressure, control the drive component to drive the first composite roller and the second composite roller to move until the next pressure detected by the pressure sensing component is within the pressure threshold range.

[0274] Here, the pressure threshold range can be any suitable range. In some embodiments, this pressure threshold range is determined based on the material of the electrode and the diaphragm. In practice, the control device adjusts the distance between the first composite roller and the second composite roller according to the current pressure. In practice, the control device can send a corresponding drive signal to the drive member, so that the drive member drives the first composite roller and the second composite roller to move according to the drive signal.

[0275] In some embodiments, the pressure threshold range includes a first pressure threshold and a second pressure threshold, wherein the first pressure threshold is less than the second pressure threshold; the step S252, "based on the current pressure, controlling the drive to drive the first composite roller and the second composite roller to move," includes steps S2521 and / or S2522, wherein:

[0276] Step S2521: When the current pressure is less than the first pressure threshold, control the drive unit to drive the first composite roller and the second composite roller to move towards each other.

[0277] Here, the first pressure threshold can be any suitable pressure value. In implementation, if the current pressure is less than the first pressure threshold, it indicates that the current pressure is too low, and the distance between the first and second composite rollers needs to be reduced. The control device can send a corresponding drive signal to the drive component, causing the drive component to drive the first and second composite rollers to move towards each other until the next pressure is within the pressure threshold range, thus preventing the battery cells from becoming loose or uneven. In some embodiments, the distance between the first and second composite rollers can be gradually adjusted to gradually adjust the pressure value between them until the pressure between them is within the pressure threshold range.

[0278] Step S2522: When the current pressure is greater than the second pressure threshold, control the drive unit to drive the first composite roller and the second composite roller to move in opposite directions.

[0279] Here, the second pressure threshold can be any suitable pressure value. In implementation, if the current pressure is greater than the second pressure threshold, it indicates that the current pressure is too high, and the distance between the first and second composite rollers needs to be increased. The control device can send a corresponding drive signal to the drive component, causing the drive component to drive the first and second composite rollers to move in opposite directions until the next pressure is within the pressure threshold range, thus preventing deformation or wrinkling of the battery cell. In some embodiments, the distance between the first and second composite rollers can be gradually adjusted to gradually adjust the pressure value between them until the pressure between them is within the pressure threshold range.

[0280] In this embodiment, on the one hand, by integrating a pressure sensing component into the hot-pressing composite mechanism to detect the pressure between the two composite rollers in real time, the electrode, diaphragm, etc. are accurately pressurized, reducing the possibility of poor performance due to insufficient pressure or deformation of the electrode, diaphragm, etc. due to excessive pressure; on the other hand, by controlling the movement of the composite rollers according to the current pressure and pressure threshold range, the accuracy of the movement of the composite rollers is improved, thereby ensuring that the electrode, diaphragm, etc. are within the normal pressure range.

[0281] In some embodiments, the hot-pressing composite mechanism further includes a temperature sensing component, and the winding method further includes steps S261 to S262, wherein:

[0282] Step S261: Control the temperature sensing component to detect the current temperature of the first composite roller and the current temperature of the second composite roller respectively.

[0283] Here, the current temperature can be any suitable temperature. In some embodiments, the control device can transmit a temperature detection signal to the temperature sensing component, so that the temperature sensing component can detect the current temperature of the first composite roller and the current temperature of the second composite roller based on the temperature detection signal. The temperature detection signal can be any suitable signal used for temperature detection. In this way, compared with real-time detection, the number of detections is reduced, and hardware consumption is lowered.

[0284] In some implementations, the temperature sensing component transmits the current temperature to the control device. The temperature sensing component and the control device can communicate directly, or they can communicate through the winding equipment; that is, the temperature sensing component is connected to the winding equipment, and the winding equipment is connected to the control device.

[0285] Step S262: If the current temperature of the target composite roll is not within the temperature threshold range, determine the target current of the detection circuit based on the current temperature of the target composite roll, and adjust the current of the detection circuit to the target current so that the temperature of the target composite roll is within the temperature threshold range.

[0286] Here, the target composite roll includes at least one of the following: a first composite roll and a second composite roll.

[0287] The temperature threshold range can be any suitable range. In some embodiments, the temperature threshold range is determined based on the material of the diaphragm. In practice, the control device adjusts the current in the detection circuit according to the current temperature. In practice, the control device can send a corresponding current adjustment signal to the winding equipment, so that the winding equipment adjusts the current in the detection circuit according to the current adjustment signal.

[0288] In some embodiments, the temperature threshold range includes a first temperature threshold and a second temperature threshold, wherein the first temperature threshold is less than the second temperature threshold; the step S262, "determining the target current of the detection circuit based on the current temperature of the target composite roller," includes steps S2621 and / or S2622, wherein:

[0289] Step S2621: When the current temperature is less than the first temperature threshold, the first current is used as the target current.

[0290] Here, the first temperature threshold can be any suitable temperature value. In practice, if the current temperature is lower than the first temperature threshold, it indicates that the current temperature is too low and needs to be increased. The control device can send a corresponding current adjustment signal to the winding equipment until the next temperature of the target composite roll is within the temperature threshold range.

[0291] The first current is greater than the current. In some implementations, the current in the detection circuit can be gradually adjusted until the first current is reached, so that the next temperature of the target composite roll is within the temperature threshold range.

[0292] Step S2622: If the current temperature is greater than the second temperature threshold, the second current is used as the target current.

[0293] Here, the second temperature threshold can be any suitable temperature value. In practice, if the current temperature is greater than the second temperature threshold, it indicates that the current temperature is too low and needs to be reduced. The control device can send a corresponding current adjustment signal to the winding equipment until the next temperature of the target composite roll is within the temperature threshold range.

[0294] The second current is less than the current. In some implementations, the current in the detection circuit can be gradually adjusted until the second current is reached, so that the next temperature of the target composite roll is within the temperature threshold range.

[0295] In this embodiment, on the one hand, by integrating a temperature sensing component into the hot-pressing composite mechanism to detect the temperature of the two composite rollers in real time, the electrode sheet, diaphragm, etc. are accurately heated, reducing the possibility of poor performance due to excessively low temperature or poor insulation performance of the diaphragm due to excessively high temperature; on the other hand, by adjusting the current of the detection circuit according to the current temperature and temperature threshold range, the accuracy of the current is improved, thereby ensuring that the temperature of the composite roller is within the normal temperature range.

[0296] In some embodiments, the winding equipment further includes a cutting mechanism located upstream of the hot-pressing composite mechanism. If the detection result of the hot-pressing composite strip is a second detection result and / or the cell winding is completed, the winding method further includes step S27, wherein:

[0297] Step S27: Control the cutting mechanism to cut the next electrode released by the target electrode unwinding mechanism.

[0298] Here, the target electrode unwinding mechanism includes at least one of the following: a first electrode unwinding mechanism and a second electrode unwinding mechanism.

[0299] The cutting mechanism can be any suitable mechanism capable of performing the cutting function. For example, a cutter, a cutting head, etc. There can be at least one such cutting mechanism.

[0300] In some implementations, the cutting mechanism and the control device can communicate directly, or they can communicate through the winding equipment. In practice, the control device sends a cutting signal to the cutting mechanism based on the second detection result and / or the cell completion signal transmitted by the winding equipment, so that the cutting mechanism can promptly cut off the next electrode based on the cutting signal.

[0301] The cell completion signal can be any suitable signal that indicates the completion of the current cell winding. In some embodiments, when the length of the hot-pressed composite strip wound by the winding mechanism is the length of one cell, the cell completion signal can be generated so that the cutting mechanism can cut off the next electrode in a timely manner.

[0302] In some embodiments, the cutting mechanism includes a first cutting mechanism and a second cutting mechanism, and step S27 includes step S271 and / or step S272, wherein:

[0303] Step S271: Control the cutting mechanism to cut the next first electrode released by the first electrode unwinding mechanism.

[0304] Here, when the detection result of the hot-pressed composite strip is the second detection result and / or the cell winding is completed, the control device sends a cutting signal to the first cutting mechanism so that the first cutting mechanism can cut off the next first electrode in a timely manner based on the cutting signal.

[0305] Step S272: Control the cutting mechanism to cut the next second electrode released by the second electrode unwinding mechanism.

[0306] Here, when the detection result of the hot-pressed composite strip is the second detection result and / or the cell winding is completed, the control device sends a cutting signal to the second cutting mechanism so that the second cutting mechanism can cut off the next second electrode in a timely manner based on the cutting signal.

[0307] In this way, timely cutting of the corresponding electrode sheets by different cutting mechanisms not only reduces interference between them, but also improves cutting efficiency and targeting.

[0308] In this embodiment, on the one hand, the integration of a cutting mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving its versatility and adaptability; on the other hand, the timely cutting of the next electrode sheet when there is an abnormality in the hot-pressed composite strip improves the targeting of the electrode sheet cutting process. At the same time, compared with the subsequent scrapping of the entire battery cell, only a portion of the battery cell is scrapped, achieving the purpose of saving materials, thereby reducing the manufacturing cost of the battery and improving the productivity of the equipment.

[0309] In some embodiments, the winding apparatus further includes a receiving mechanism located upstream of the cutting mechanism, and the winding method further includes step S28 after the cutting mechanism cuts off the next electrode sheet, wherein:

[0310] Step S28: Control the receiving mechanism to connect the next electrode sheet to the winding mechanism.

[0311] Here, the receiving mechanism can be any suitable mechanism capable of performing the receiving function, such as a receiving plate. The number of receiving mechanisms can be at least one. In implementation, the number of receiving mechanisms can be adapted to the number of cutting mechanisms.

[0312] In some implementations, the receiving mechanism can communicate directly with the control device, or it can communicate with the control device through the winding equipment. In practice, the control device sends a receiving signal to the receiving mechanism based on the cut-off completion signal transmitted by the winding equipment, so that the receiving mechanism receives the next electrode sheet into the winding mechanism based on the receiving signal, so that the winding mechanism can wind the electrode sheet to form the next cell.

[0313] The cutting completion signal can be any suitable signal that indicates the completion of electrode cutting. In some embodiments, the cutting completion signal is automatically generated when the cutting mechanism cuts the next electrode, so that the receiving mechanism can receive the electrode in a timely manner.

[0314] In some embodiments, the receiving mechanism includes a first receiving mechanism and a second receiving mechanism, and step S28 includes step S281 and / or step S282, wherein:

[0315] Step S281: Control the second receiving mechanism to connect the next first electrode sheet to the winding mechanism.

[0316] Here, after cutting off the next first electrode sheet, the control device sends a receiving signal to the first receiving mechanism so that the first receiving mechanism can connect the next first electrode sheet to the winding mechanism in a timely manner based on the receiving signal.

[0317] Step S282: Control the second receiving mechanism to connect the next second electrode sheet to the winding mechanism.

[0318] Here, after cutting off the next second electrode, the control device sends a receiving signal to the second receiving mechanism so that the second receiving mechanism can connect the next second electrode to the winding mechanism in a timely manner based on the receiving signal.

[0319] In this way, timely receiving of the corresponding electrode sheets through different receiving mechanisms not only reduces interference between them, but also improves receiving efficiency and targeting.

[0320] In this embodiment, on the one hand, the integration of a receiving mechanism into the winding equipment enriches the functions of the winding equipment, thereby improving the versatility and adaptability of the winding equipment; on the other hand, after cutting off the next electrode sheet, the receiving mechanism is used to promptly receive the electrode sheet, ensuring the normal operation of product production and meeting the production requirements of high timeliness and high efficiency.

[0321] Figure 10 A schematic diagram of the implementation process of a winding method provided in this embodiment of the present disclosure. Figure 2 ,like Figure 10 As shown, the winding method includes steps S301 to S310, wherein:

[0322] Step S301: Control the anode unwinding mechanism to release the anode electrode, the first diaphragm unwinding mechanism to release the upper diaphragm, the cathode unwinding mechanism to release the cathode electrode, and the second diaphragm unwinding mechanism to release the lower diaphragm.

[0323] Step S302: Control the hot-pressing composite mechanism to hot-press the target electrode and the target diaphragm to form a hot-pressed composite strip;

[0324] Step S303: Control the displacement sensor (corresponding to the aforementioned displacement sensing component) to detect the current distance between the first composite roller and the second composite roller;

[0325] Step S304: Control the pressure sensor (corresponding to the aforementioned pressure sensing component) to detect the current pressure between the first composite roller and the second composite roller;

[0326] Step S305: Based on the current pressure and current distance, control the drive component to drive the first composite roller and the second composite roller to move until the winding is completed;

[0327] Step S306: Control the temperature sensor (corresponding to the aforementioned temperature sensing component) to detect the current temperature of the first composite roller and the current temperature of the second composite roller;

[0328] Step S307: Adjust the current of the detection circuit according to the current temperature of the first composite roller and the current temperature of the second composite roller until the winding is finished.

[0329] Step S308: If the detection result of the hot-pressed composite strip is the second detection result or the cell winding is completed, control the cutting mechanism to cut the next anode electrode and the next cathode electrode.

[0330] Here, hot pressing and testing are performed simultaneously.

[0331] Step S309: Control the receiving mechanism to receive the next anode electrode and the next cathode electrode into the winding mechanism;

[0332] Step S310: Control the winding mechanism to wind the hot-pressed composite strip in a preset winding direction.

[0333] In this embodiment, firstly, by simultaneously performing the hot-pressing composite process and the inspection process, not only is the time of each independent process reduced and production efficiency improved, but the inspection effect is also improved, reducing the possibility of defects not being detected due to pressure relief between the electrode and the diaphragm, the electrode and foreign matter, or the diaphragm and foreign matter. Secondly, when there is an abnormality in the hot-pressed composite strip, the next electrode is cut off in a timely manner, improving the targeting of electrode cutting and achieving the goal of saving materials. Finally, after cutting off the next electrode, the electrode is promptly received using a receiving mechanism, ensuring the normal progress of product production and meeting the production requirements of high timeliness and high efficiency.

[0334] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0335] In the several embodiments provided in this disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. In addition, all functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in hardware or in the form of hardware plus software functional units.

[0336] The above description is merely an embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A winding device, characterized in that, It includes a first electrode unwinding mechanism, a second electrode unwinding mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a winding mechanism, a hot-pressing composite mechanism, and a detection mechanism, wherein: The first electrode unwinding mechanism is used to release the first electrode. The second electrode unwinding mechanism is used to release the second electrode. The first diaphragm unwinding mechanism is used to release the first diaphragm; The second diaphragm unwinding mechanism is used to release the second diaphragm; The hot-pressing composite mechanism is used to hot-press a target electrode and a target diaphragm to form a hot-pressed composite strip; wherein, the target electrode includes at least one of the following: a current first electrode released by the first electrode unwinding mechanism and a current second electrode released by the second electrode unwinding mechanism, and the target diaphragm includes at least one of the following: a current first diaphragm released by the first diaphragm unwinding mechanism and a current second diaphragm released by the second diaphragm unwinding mechanism; The detection mechanism is used to determine the detection result of the hot-pressed composite strip based on the current of the detection circuit; wherein, the detection circuit includes the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip; The winding mechanism is used to wind the hot-pressed composite strip.

2. The winding equipment according to claim 1, characterized in that, The winding equipment also includes a cutting mechanism, wherein: The cutting mechanism, located upstream of the hot-pressing composite mechanism, is used to cut the next electrode released by the target electrode unwinding mechanism when the detection result of the hot-pressing composite strip is the second detection result; wherein the second detection result indicates that the hot-pressing composite strip has a defect, and the target electrode unwinding mechanism includes at least one of the following: the first electrode unwinding mechanism and the second electrode unwinding mechanism.

3. The winding equipment according to claim 2, characterized in that, The winding equipment also includes a receiving mechanism, wherein: The receiving mechanism, located upstream of the cutting mechanism, is used to connect the cut next electrode sheet to the winding mechanism.

4. The winding equipment according to claim 1, characterized in that, The hot-pressing composite mechanism includes a pressure sensing component, a displacement sensing component, a temperature sensing component, a composite component, and a driving component. The composite component includes a first composite roller and a second composite roller, wherein: The displacement sensing component is used to detect the current distance between the first composite roller and the second composite roller; The driving component is used to drive the first composite roller and the second composite roller to move based on the current distance detected by the displacement sensing component, so as to decrease or increase the distance between the first composite roller and the second composite roller. The pressure sensing component is used to detect the current pressure between the first composite roller and the second composite roller; The drive unit is further configured to drive the first composite roller and the second composite roller to move when the current pressure is not within the pressure threshold range, so that the pressure between the first composite roller and the second composite roller is within the pressure threshold range. The temperature sensing component is used to detect the current temperature of the first composite roller and the current temperature of the second composite roller. The detection mechanism is further configured to adjust the current current of the detection circuit based on the current temperature of the target composite roller when the current temperature of the target composite roller is not within the temperature threshold range, so that the temperature of the target composite roller is within the temperature threshold range.

5. The winding equipment according to claim 4, characterized in that, The composite component includes a heating element, wherein: The heating element is used to heat the composite component based on the current of the detection circuit.

6. The winding device according to claim 4, characterized in that, The width of the composite component is not less than the width of the hot-pressed composite strip.

7. The winding apparatus according to any one of claims 1 to 6, characterized in that, When the hot-pressed composite strip includes a first hot-pressed composite strip, the hot-pressed composite mechanism includes a first hot-pressed composite mechanism, the detection mechanism includes a first detection mechanism, and the detection circuit includes a first detection circuit, wherein: The first hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, the current second electrode, and the current second diaphragm to form the first hot-pressing composite strip; The first detection mechanism is used to determine the detection result of the first hot-pressed composite strip based on the current current of the first detection circuit. The first detection circuit includes the first detection mechanism, the first hot-pressed composite mechanism, and the first hot-pressed composite strip.

8. The winding apparatus according to any one of claims 1 to 6, characterized in that, When the hot-pressed composite strip includes a second hot-pressed composite strip, the hot-pressed composite mechanism includes a second hot-pressed composite mechanism, the detection mechanism includes a second detection mechanism, and the detection circuit includes a second detection circuit, wherein: The second hot-pressing composite mechanism is used to hot-press the current first electrode and the current first diaphragm to form the second hot-pressing composite strip; The second detection mechanism is used to determine the detection result of the second hot-pressed composite strip based on the current current of the second detection circuit. The second detection circuit includes the second detection mechanism, the second hot-pressed composite mechanism, and the second hot-pressed composite strip. And / or, When the hot-pressed composite strip includes a third hot-pressed composite strip, the hot-pressed composite mechanism includes a third hot-pressed composite mechanism, the detection mechanism includes a third detection mechanism, and the detection circuit includes a third detection circuit, wherein: The third hot-pressing composite mechanism is used to hot-press the current second electrode and the current second diaphragm to form the third hot-pressing composite strip; The third detection mechanism is used to determine the detection result of the third hot-pressed composite strip based on the current of the third detection circuit. The third detection circuit includes the third detection mechanism, the third hot-pressed composite mechanism, and the third hot-pressed composite strip.

9. The winding equipment according to claim 8, characterized in that, When the hot-pressed composite strip further includes a fourth hot-pressed composite strip, the hot-pressed composite mechanism further includes a fourth hot-pressed composite mechanism, the detection mechanism further includes a fourth detection mechanism, and the detection circuit further includes a fourth detection circuit, wherein: The fourth hot-pressing composite mechanism is used to hot-press the second hot-pressing composite strip and the third hot-pressing composite strip to form the fourth hot-pressing composite strip; The fourth detection mechanism is used to determine the detection result of the fourth hot-pressed composite strip based on the current of the fourth detection circuit. The fourth detection circuit includes the fourth detection mechanism, the fourth hot-pressed composite mechanism, and the fourth hot-pressed composite strip.

10. The winding apparatus according to any one of claims 1 to 6, characterized in that, When the hot-pressed composite strip includes a fifth hot-pressed composite strip, the hot-pressed composite mechanism includes a fifth hot-pressed composite mechanism, the detection mechanism includes a fifth detection mechanism, and the detection circuit includes a fifth detection circuit, wherein: The fifth hot-pressing composite mechanism is used to hot-press the current first electrode, the current first diaphragm, and the current second electrode to form the fifth hot-pressing composite strip; The fifth detection mechanism is used to determine the detection result of the fifth hot-pressed composite strip based on the current of the fifth detection circuit. The fifth detection circuit includes the fifth detection mechanism, the fifth hot-pressed composite mechanism, and the fifth hot-pressed composite strip.

11. The winding apparatus according to claim 10, characterized in that, In the case where the hot-pressed composite strip also includes a sixth hot-pressed composite strip, the hot-pressed composite mechanism further includes a sixth hot-pressed composite mechanism, the detection mechanism further includes a sixth detection mechanism, and the detection circuit further includes a sixth detection circuit, wherein: The sixth hot-pressing composite mechanism is used to hot-press the fifth hot-pressing composite strip and the current second diaphragm to form the sixth hot-pressing composite strip; The sixth detection mechanism is used to determine the detection result of the sixth hot-pressed composite strip based on the current of the sixth detection circuit. The sixth detection circuit includes the sixth detection mechanism, the sixth hot-pressed composite mechanism, and the sixth hot-pressed composite strip.

12. A winding method, characterized in that, The winding method includes: The hot-pressing composite mechanism of the control winding equipment hot-presses and composites a target electrode sheet and a target diaphragm to form a hot-pressed composite strip; wherein, the winding equipment includes a first electrode sheet unwinding mechanism, a second electrode sheet unwinding mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a winding mechanism, the hot-pressing composite mechanism, and a detection mechanism; the target electrode sheet includes at least one of the following: a current first electrode sheet released by the first electrode sheet unwinding mechanism, and a current second electrode sheet released by the second electrode sheet unwinding mechanism; the target diaphragm includes at least one of the following: a current first diaphragm released by the first diaphragm unwinding mechanism, and a current first diaphragm released by the second diaphragm unwinding mechanism. The detection result of the hot-pressed composite strip is determined based on the current of the detection circuit; wherein, the detection circuit includes the detection mechanism, the hot-pressing composite mechanism, and the hot-pressed composite strip; Control the winding mechanism to wind the hot-pressed composite strip.

13. The winding method according to claim 12, characterized in that, The determination of the detection result of the hot-pressed composite strip based on the current current of the detection circuit includes: The resistance of the hot-pressed composite strip is determined based on the current current and current detection voltage of the detection circuit; wherein the current detection voltage is determined based on the target diaphragm. If the resistance of the hot-pressed composite strip is within the resistance threshold range, the first detection result is taken as the detection result of the hot-pressed composite strip; wherein, the first detection result indicates that the hot-pressed composite strip has no defects; If the resistance of the hot-pressed composite strip is not within the resistance threshold range, the second detection result shall be taken as the detection result of the hot-pressed composite strip; wherein, the second detection result indicates that the hot-pressed composite strip has a defect.

14. The winding method according to claim 12, characterized in that, The winding equipment further includes a cutting mechanism located upstream of the hot-pressing composite mechanism, and the winding method further includes: If the detection result of the hot-pressed composite strip is the second detection result, the cutting mechanism is controlled to cut the next electrode released by the target electrode unwinding mechanism; wherein, the target electrode unwinding mechanism includes at least one of the following: the first electrode unwinding mechanism and the second electrode unwinding mechanism.

15. The winding method according to claim 14, characterized in that, The winding equipment further includes a receiving mechanism located upstream of the cutting mechanism, and the winding method further includes: The receiving mechanism is controlled to connect the next electrode to the winding mechanism.

16. The winding method according to any one of claims 12 to 15, characterized in that, The hot-pressing composite mechanism includes a composite component, a driving component, and a displacement sensing assembly. The composite component includes a first composite roller and a second composite roller. The winding method further includes: The displacement sensing component is controlled to detect the current distance between the first composite roller and the second composite roller; Based on the current distance, the drive unit is controlled to drive the first composite roller and the second composite roller to move, so as to reduce or increase the distance between the first composite roller and the second composite roller.

17. The winding method according to claim 16, characterized in that, The hot-pressing composite mechanism further includes a pressure sensing component, and the winding method further includes: The pressure sensing component is controlled to detect the current pressure between the first composite roller and the second composite roller; If the current pressure is not within the pressure threshold range, the drive unit is controlled to drive the first composite roller and the second composite roller to move based on the current pressure until the next pressure detected by the pressure sensing component is within the pressure threshold range.

18. The winding method according to claim 16, characterized in that, The hot-pressing composite mechanism further includes a temperature sensing component, and the winding method further includes: The temperature sensing components are controlled to detect the current temperature of the first composite roller and the current temperature of the second composite roller, respectively. If the current temperature of the target composite roll is not within the temperature threshold range, the target current of the detection circuit is determined based on the current temperature of the target composite roll, and the current of the detection circuit is adjusted to the target current so that the temperature of the target composite roll is within the temperature threshold range.

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