A method for manufacturing a hollow large circular core capacitor

Abstract

The present invention relates to the technical field of capacitor preparation, and in particular to a method for making a hollow large circular core package capacitor, comprising rolling up a metal film and a dielectric film through a specific film winding structure to form a hollow dielectric coil; encapsulating the hollow dielectric coil to form a capacitor core package; placing the capacitor core package in a housing, and encapsulating it to prepare a finished capacitor. The present invention adopts a single-core design, which significantly reduces the complex connection between the electrode and the dielectric layer and reduces the number of fault points compared to multi-core capacitors. This greatly reduces problems such as poor connection or breakage, and effectively improves the stability and reliability of the capacitor during long-term operation.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor preparation, and in particular to a method for preparing a hollow large circular core package capacitor. Background Art

[0002] In the process of rapid development of modern electronic technology, capacitors, as basic electronic components, are widely used in various electronic devices and systems. From consumer electronic products such as smart phones and tablets, to automation equipment and power transmission systems in the industrial field, to emerging new energy vehicles and Internet of Things devices, capacitors play an indispensable role. As these application fields continue to develop in the direction of miniaturization, high performance, and high reliability, the structure and performance of traditional capacitors face many challenges. For example, in high-power application scenarios, traditional capacitors have difficulty in dissipating heat and are prone to performance degradation or even damage due to overheating; in space-constrained devices, their size and weight become factors that restrict the overall design optimization. These problems have prompted researchers to continuously explore new capacitor design and manufacturing methods to meet the growing technological needs.

[0003] Chinese Patent Publication No.: CN113077986A discloses a metallized modified polyimide film capacitor and a preparation method thereof. The preparation method reduces the polarizability of the polyimide material by introducing fluorine atoms or siloxanes and reducing the number of ionic bonds, while improving its mechanical properties and thermal properties. A certain amount of inorganic nanomaterials are then introduced to improve the bending strength and bending modulus of the polyimide composite material at high temperatures. The modified polyimide film is first treated by surface roughening, activation, reduction, etc., and then a metallized modified polyimide film is formed by a film forming technology such as vacuum evaporation, cathode vacuum spraying or ion plating. The film is used for staggered winding of the core, and then heat setting, gold spraying, energization, testing, welding, potting, and curing are performed.

[0004] In the current capacitor preparation field, multiple cores will increase the overall volume of the capacitor, which is not conducive to space-constrained applications. At the same time, the weight will also increase due to the addition of multi-layer dielectrics and metal electrodes, affecting the efficiency and use of the equipment. Summary of the invention

[0005] To this end, the present invention provides a method for manufacturing a hollow large circular core package capacitor to overcome the problem in the prior art that multiple cores in the capacitor preparation field will increase the overall volume of the capacitor, which is not conducive to applications with limited space. At the same time, the weight will also increase due to the addition of multiple layers of dielectrics and metal electrodes, affecting the efficiency and use of the equipment.

[0006] To achieve the above object, the present invention provides a method for manufacturing a hollow large circular core capacitor, comprising:

[0007] The metal film and the dielectric film are rolled up by the film rolling structure to form a hollow dielectric coil;

[0008] Packaging the hollow dielectric coil to form a capacitor core package;

[0009] The capacitor core package is placed in the housing and packaged to prepare a finished capacitor;

[0010] The process of forming the hollow dielectric coil includes:

[0011] Pre-winding the dielectric film on a hollow winding device;

[0012] After the dielectric film is pre-wound on the hollow winding device for several turns, the metal film is wound onto the hollow winding device, and at the same time, the spraying structure is started to spray the surface of the dielectric film;

[0013] The medium film pressure detection device detects the pressure borne by the medium film during the winding process, the position adjustment module obtains the position information of the medium film adjustment shaft, and the visual detection module detects the thickness of the winding on the hollow winding device;

[0014] The data processing unit determines whether it is necessary to adjust the position of the medium film adjusting shaft or adjust the rotation speed of the hollow winding device through the detected pressure value of the medium film, the position information of the medium film adjusting shaft and the winding thickness.

[0015] Further, the order of determining whether it is necessary to adjust the position of the medium film adjustment shaft or adjust the rotation speed of the hollow winding device is:

[0016] First, determine whether the position of the medium film adjustment shaft is reasonable based on the pressure value borne by the medium film, the position information of the medium film adjustment shaft and the data information of the winding thickness, and then determine whether the rotation speed of the hollow winding device is reasonable.

[0017] Furthermore, the process of the data processing unit determining the corresponding winding thickness range through the position information of the medium film adjustment shaft includes:

[0018] Two oblique lines are made below the dielectric film adjustment shaft through preset points and preset angles toward the hollow winding device;

[0019] Make two concentric circles with the center of the hollow winding device as the center, and the two concentric circles are tangent to the two oblique lines respectively;

[0020] The area corresponding to the complement of the two concentric circles is taken as the winding thickness range.

[0021] Furthermore, the data processing unit compares the obtained winding thickness with the winding thickness range.

[0022] If the winding thickness falls within the winding thickness range, the pressure value is compared to determine whether the winding state is normal;

[0023] If the winding thickness does not fall within the winding thickness range, the position of the medium film adjustment shaft is re-determined.

[0024] Further, for the winding thickness not falling within the winding thickness range, if the winding thickness is less than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment shaft is higher, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment shaft downward;

[0025] The data processing unit determines the downward adjustment distance range according to the winding thickness, and determines the moving speed of the medium film adjustment shaft during the adjustment process, or the operating state of the hollow winding device speed according to the detected pressure value.

[0026] Further, for the winding thickness not falling within the winding thickness range, if the winding thickness is greater than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment shaft is low, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment shaft upward;

[0027] The data processing unit determines the upward adjustment distance range according to the winding thickness, and determines the moving speed of the medium film adjustment shaft during the adjustment process, or the operating state of the hollow winding device speed according to the detected pressure value.

[0028] Furthermore, two tangents of the hollow dielectric coil are determined above the hollow dielectric coil by preset points and preset angles, and the range between the two intersection points of the two tangents and the two intersection points of the adjustment shaft conveying slide rail is the ideal position range of the dielectric film adjustment shaft, and the adjustment distance range of the dielectric film adjustment shaft is determined by the ideal position range.

[0029] Furthermore, when the dielectric film adjusting shaft is adjusted in position, the relationship between the moving speed of the dielectric film adjusting shaft and the speed of the hollow winding device is determined by comparing the detected pressure value with the preset pressure value interval.

[0030] Further, if the winding thickness falls within the winding thickness range, and the detected pressure value falls within the preset pressure value interval, each component maintains the current operation mode;

[0031] If the winding thickness falls within the winding thickness range and the detected pressure value does not fall within the preset pressure value interval, the speed of the hollow winding device is adjusted.

[0032] Further, adjusting the speed of the hollow winding device includes:

[0033] Determine the magnitude relationship between the pressure value and the preset pressure value interval;

[0034] Determine whether the hollow winding device is accelerating or decelerating;

[0035] The ratio of acceleration or deceleration of the hollow winding device is determined according to the proportional relationship between the pressure value and the limit value of the preset pressure value interval.

[0036] Compared with the prior art, the invention has the beneficial effect that the invention adopts a single-core design, which significantly reduces the complex connection between the electrode and the dielectric layer and reduces the number of fault points compared to multi-core capacitors. This greatly reduces problems such as poor connection or breakage, and effectively improves the stability and reliability of the capacitor during long-term operation.

[0037] In the process of preparing the capacitor core package, the dielectric film is rolled onto the hollow winding device, and there is tension on the dielectric film. The dielectric film is guided by the dielectric film adjusting shaft. The greater the tension on the dielectric film, the greater the pressure of the dielectric film on the dielectric film adjusting shaft. At the same time, when the dielectric film is rolled onto the hollow winding device, the dielectric film can be regarded as the tangent of the outer contour of the hollow winding device. The angle formed by the tangent and the plane where the dielectric film adjusting shaft is located will also affect the pressure on the dielectric film adjusting shaft. At the same time, in order to ensure the uniform bonding between the dielectric film and the metal film, the dielectric film The interval between the dielectric film and the metal film rolled onto the hollow winding device should be within a certain range. Based on the accuracy of the dielectric film tensile force detection and the control of the interval between the dielectric film and the metal film rolled onto the hollow winding device, a dielectric film adjustment axis that can move up and down is provided so that the dielectric film can be rolled onto the hollow winding device nearly horizontally. In the process of the hollow dielectric coil becoming thicker, the tangent point where the metal film is rolled onto the hollow dielectric coil continuously moves upward. By adjusting the position of the dielectric film adjustment axis, the stability of the hollow dielectric coil during the rolling process can be guaranteed.

[0038] By measuring the thickness of the hollow dielectric coil, the pressure on the film and the position of the dielectric film adjustment axis during the forming process, it is comprehensively determined whether the hollow dielectric coil forming process is reasonable, and further ensure the stability of the hollow dielectric coil forming process.

[0039] Furthermore, the single-core design makes the structure more compact, which can reduce the amount of materials used while ensuring the same capacitance value, thereby reducing the volume of the capacitor. At the same time, the hollow structure further reduces the overall weight, which is particularly suitable for mobile devices, portable electronic products, aerospace and other applications with strict space and weight requirements.

[0040] Furthermore, the unique structure of the hollow single-core capacitor reduces the internal complex paths and reduces parasitic inductance (such as the inductance generated by the electrode leads in the multi-core structure). In high-frequency application scenarios such as radio frequency (RF) and communication equipment, it can better maintain performance, reduce signal loss and distortion, and show excellent high-frequency response characteristics.

[0041] Furthermore, the hollow structure provides space for heat diffusion, effectively promotes air circulation or achieves more efficient heat dissipation through special design. This helps to reduce the internal temperature rise of the capacitor, avoid performance degradation or failure due to overheating, and enable it to operate stably for a long time in high voltage or high current applications, especially in high power environments. The single-core design simplifies the production process, reduces the assembly, testing and debugging links, and greatly saves production time and cost. At the same time, the reduction in the use of electrodes and dielectrics, as well as the reduction in internal fillers brought about by the hollow design, reduces material costs, and has obvious advantages in large-scale production. The internal structure of the single-core capacitor is simple and uniform, the electric field distribution is stable, the interaction between the dielectric layer and the electrode is balanced, and the electrical properties such as capacitance value, withstand voltage and failure mode are more stable and controllable. The electrical characteristics change little, which can ensure long-term stable operation, reduce aging and degradation factors, and extend the service life. Due to the simple design of the single-core and few failure points, it is particularly suitable for fields with extremely high reliability requirements such as military, aerospace, automotive electronics and medical equipment. It can work stably for a long time in extreme environments, has high fault tolerance and strong stability, good vibration and impact resistance, and low failure rate.

[0042] Furthermore, the ideal winding thickness is determined through the position information of the dielectric film adjustment shaft, and the angle range formed by the dielectric film with the horizontal line when it is rolled onto the hollow winding device is limited, thereby ensuring the area of ​​the dielectric film that is in contact with the dielectric film adjustment shaft. This makes the relationship between the pressure data detected by the dielectric film adjustment shaft and the tension data exerted on the dielectric film stable, laying the foundation for adjusting the production process of the hollow dielectric coil.

[0043] Furthermore, because the difference in the contact area between the dielectric film adjustment shaft and the dielectric film will affect the pressure value on the dielectric film adjustment shaft, therefore, when judging the acquired data, whether the position of the dielectric film adjustment shaft is reasonable is the first priority. The winding thickness does not fall within the winding thickness range, indicating that the angle formed by the dielectric film with the horizontal line when it is rolled onto the hollow winding device exceeds the range. At this time, in order to correctly reflect the pressure on the dielectric film, the position of the dielectric film adjustment shaft needs to be adjusted to a reasonable range to ensure the accuracy of the remaining data judgments.

[0044] Furthermore, by using the already formed winding thickness to reversely infer the ideal position range of the dielectric film adjustment axis when the dielectric film is nearly horizontally rolled onto the hollow winding device, the dielectric film adjustment axis and the dielectric film bonding area are restored to the preset range, thereby obtaining reasonable data information, ensuring the accuracy of the remaining data judgments, and further ensuring the stability of the hollow dielectric coil processing.

[0045] Furthermore, when the dielectric film adjustment shaft is adjusted downward, the length of the dielectric film between the hollow winding device and the dielectric film conveying shaft will increase, and the dielectric film adjustment shaft will also generate pressure on the dielectric film. The speed of the dielectric film conveying shaft is not switched during the adjustment process. For pressure values ​​that exceed the tolerance, the speed of the circular motion of the edge of the hollow dielectric coil is made less than the moving speed of the dielectric film conveying shaft, thereby ensuring that the hollow dielectric coil is formed without interruption during the adjustment process. For pressure values ​​that are insufficient, the speed of the circular motion of the edge of the hollow dielectric coil is also made less than the moving speed of the dielectric film conveying shaft, but the standard value for comparison is different when the pressure is reduced, making the regulation more targeted.

[0046] Furthermore, for the upward adjustment of the dielectric film adjustment axis, the length of the dielectric film between the hollow winding device and the dielectric film conveying axis will be reduced, and the tension on the dielectric film will be reduced. Therefore, for pressure values ​​greater than the pressure value range, its speed is consistent with the speed of the upward adjustment of the dielectric film adjustment axis. For pressure values ​​less than the pressure value range, the speed of the circular motion of the edge of the hollow dielectric coil is increased during adjustment to ensure the rationality of the adjustment.

[0047] Furthermore, the speed of the hollow winding device is adjusted according to the excess ratio through the detected pressure value, thereby ensuring the accuracy of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of a hollow dielectric coil preparation device in an embodiment;

[0049] Figure 2 It is a flow chart of a method for manufacturing a hollow large circular core package capacitor in an embodiment;

[0050] Figure 3 It is a flow chart of the method for preparing the hollow dielectric coil in the embodiment;

[0051] Figure 4 It is a flow chart of adjusting the speed of the hollow winding device in the embodiment;

[0052] Figure 5 Schematic diagram of a hollow large circular core capacitor prepared in the embodiment. DETAILED DESCRIPTION

[0053] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0055] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0056] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] See also Figure 1 As shown, Figure 1 It is a schematic structural diagram of the hollow dielectric coil preparation equipment in the embodiment.

[0058] The present invention provides a hollow dielectric coil preparation device, comprising:

[0059] A hollow winding device 1 is used for winding up a metal film and a dielectric film. The hollow winding device is provided with a plurality of supporting components 11. Any supporting component 11 is connected to a telescopic column 12. When the metal film and the dielectric film are wound up, the telescopic column 12 is extended. After the winding is completed, the telescopic column 12 is shortened, so as to facilitate the removal of the hollow dielectric coil;

[0060] The medium film conveying shaft 2 is used to guide and convey the medium film;

[0061] The medium film adjustment shaft 3 is used to adjust the angle of medium film conveyance, and a slider is arranged on the shaft;

[0062] An adjusting shaft conveying slide rail 4, which is connected to the medium film adjusting shaft 3, and the medium film adjusting shaft can slide along the adjusting shaft conveying slide rail;

[0063] A dielectric film pressure detection device, which is arranged on the dielectric film adjustment shaft 3 and is used to detect the pressure change of the film during the winding process;

[0064] A spraying structure 5, used for spraying the surface of the dielectric film, wherein the lateral position and the spraying angle of the spraying structure are adjustable;

[0065] The metal film conveying shaft 6 is used to guide and convey the metal film;

[0066] A visual inspection module is used to detect the thickness of the coil on the hollow winding device;

[0067] A speed control module, which is connected to the hollow winding device, the dielectric film conveying shaft, and the metal film conveying shaft, respectively, and is used to adjust the speeds of the hollow winding device, the dielectric film conveying shaft, and the metal film conveying shaft;

[0068] A position adjustment module, which is connected to the spraying structure and the medium film adjustment shaft respectively, and is used to adjust the positions of the spraying structure and the medium film, and adjust the angle of the spraying structure;

[0069] A data processing unit is respectively connected to the dielectric film pressure detection device, the visual detection module, the speed control module, and the position adjustment module, and is used to issue adjustment instructions to the speed control module and the position adjustment module according to the data detected by the dielectric film pressure detection device and the visual detection module, so as to adjust the working mode of the hollow dielectric coil preparation equipment during the hollow dielectric coil preparation process.

[0070] See also Figure 2-Figure 4 As shown, Figure 2 It is a flow chart of a method for manufacturing a hollow large circular core package capacitor in an embodiment; Figure 3 It is a flow chart of the method for preparing the hollow dielectric coil in the embodiment; Figure 4 It is a flow chart of adjusting the speed of the hollow winding device in the embodiment.

[0071] The present invention provides a method for manufacturing a hollow large circular core capacitor, comprising:

[0072] S1, rolling up the metal film and the dielectric film through a specific film rolling structure to form a hollow dielectric coil;

[0073] S2, packaging the hollow dielectric coil to form a capacitor core package;

[0074] S3, placing the capacitor core package into the housing and encapsulating it to prepare a finished capacitor.

[0075] Preparation of hollow dielectric coils includes:

[0076] S11, pre-winding the dielectric film on a hollow winding device;

[0077] S12, after the dielectric film is pre-wound on the hollow winding device for several turns, the metal film is then wound onto the hollow winding device, and the spraying structure is started to spray the surface of the dielectric film;

[0078] S13, the dielectric film pressure detection device detects the pressure on the dielectric film during the winding process, the position adjustment module obtains the position information of the dielectric film adjustment shaft, and the visual detection module detects the thickness of the winding on the hollow winding device;

[0079] S14, the data processing unit determines whether it is necessary to adjust the position of the medium film adjusting shaft or adjust the rotation speed of the hollow winding device by combining the detected pressure value of the medium film, the position information of the medium film adjusting shaft and the winding thickness.

[0080] The specific film winding structure is the hollow dielectric coil preparation equipment described above.

[0081] The present invention adopts a single-core design, which significantly reduces the complex connection between the electrode and the dielectric layer and reduces the number of fault points compared to multi-core capacitors. This greatly reduces problems such as poor connection or breakage, and effectively improves the stability and reliability of the capacitor during long-term operation.

[0082] In the process of preparing the capacitor core package, the dielectric film is rolled onto the hollow winding device, and there is tension on the dielectric film. The dielectric film is guided by the dielectric film adjusting shaft. The greater the tension on the dielectric film, the greater the pressure of the dielectric film on the dielectric film adjusting shaft. At the same time, when the dielectric film is rolled onto the hollow winding device, the dielectric film can be regarded as the tangent of the outer contour of the hollow winding device. The angle formed by the tangent and the plane where the dielectric film adjusting shaft is located will also affect the pressure on the dielectric film adjusting shaft. At the same time, in order to ensure the uniform bonding between the dielectric film and the metal film, the dielectric film The interval between the dielectric film and the metal film rolled onto the hollow winding device should be within a certain range. Based on the accuracy of the dielectric film tensile force detection and the control of the interval between the dielectric film and the metal film rolled onto the hollow winding device, a dielectric film adjustment axis that can move up and down is provided so that the dielectric film can be rolled onto the hollow winding device nearly horizontally. In the process of the hollow dielectric coil becoming thicker, the tangent point where the metal film is rolled onto the hollow dielectric coil continuously moves upward. By adjusting the position of the dielectric film adjustment axis, the stability of the hollow dielectric coil during the rolling process can be guaranteed.

[0083] By measuring the thickness of the hollow dielectric coil, the pressure on the film and the position of the dielectric film adjustment axis during the forming process, it is comprehensively determined whether the hollow dielectric coil forming process is reasonable, and further ensure the stability of the hollow dielectric coil forming process.

[0084] At the same time, the single-core design makes the structure more compact, and can reduce the amount of material used while ensuring the same capacitance value, thereby reducing the volume of the capacitor. At the same time, the hollow structure further reduces the overall weight, which is particularly suitable for mobile devices, portable electronic products, aerospace and other applications with strict space and weight requirements. The hollow structure provides space for heat diffusion, effectively promotes air circulation or achieves more efficient heat dissipation through special design. This helps to reduce the internal temperature rise of the capacitor, avoid performance degradation or failure due to overheating, and enable it to operate stably for a long time in high-voltage or high-current applications, especially in high-power environments. The single-core design simplifies the production process, reduces assembly, testing and debugging, and greatly saves production time and cost. At the same time, the reduction in the use of electrodes and dielectrics, as well as the reduction in internal fillers brought about by the hollow design, reduces material costs, and has obvious advantages in large-scale production. The internal structure of the single-core capacitor is simple and uniform, the electric field distribution is stable, the interaction between the dielectric layer and the electrode is balanced, and the electrical properties such as capacitance value, voltage resistance and failure mode are more stable and controllable. The electrical characteristics change little, which can ensure long-term stable operation, reduce aging and degradation factors, and extend the service life. Due to the simple single-core design and few failure points, it is particularly suitable for fields with extremely high reliability requirements such as military, aerospace, automotive electronics and medical equipment. It can work stably for a long time in extreme environments, has high fault tolerance and strong stability, good vibration and impact resistance, and low failure rate.

[0085] The data processing unit determines the corresponding winding thickness range through the position information of the medium film adjustment shaft.

[0086] The process of determining the winding thickness range is as follows:

[0087] Get the current position information of the medium film adjustment axis;

[0088] Make a first tangent line according to a first preset point of the medium film adjustment axis;

[0089] Make a second tangent line according to a second preset point of the medium film adjustment axis;

[0090] Using the center of the hollow winding device as a center, concentric circles are drawn that are tangent to the first tangent line and the second tangent line respectively;

[0091] The thickness of the annular area remaining after removing the overlapping part of the circle with a larger radius from the circle with a smaller radius is taken as the winding thickness range.

[0092] The first preset point and the second preset point are both arranged near the lowest point of the dielectric film adjustment axis; the angle formed by the first tangent line and the horizontal line is the first preset angle; the angle formed by the second tangent line and the horizontal line is the second preset angle.

[0093] In this embodiment, the angle formed by the first tangent line and the horizontal line is -10°; the angle formed by the second tangent line and the horizontal line is 10°.

[0094] The ideal winding thickness is determined by the position information of the dielectric film adjustment shaft, and the angle range formed by the dielectric film and the horizontal line when it is rolled onto the hollow winding device is limited, so as to ensure the area of ​​the dielectric film that is in contact with the dielectric film adjustment shaft. This makes the relationship between the pressure data detected by the dielectric film adjustment shaft and the tension data on the dielectric film stable, laying the foundation for adjusting the production process of hollow dielectric coils.

[0095] After determining the winding thickness range, the data processing unit compares the obtained winding thickness with the winding thickness range.

[0096] If the winding thickness falls within the winding thickness range, the pressure value is compared to determine whether the winding state is normal;

[0097] If the winding thickness does not fall within the winding thickness range, the position of the medium film adjustment shaft is re-determined.

[0098] Because the difference in the area of ​​contact between the dielectric film adjustment shaft and the dielectric film will affect the pressure value on the dielectric film adjustment shaft, therefore, when judging the acquired data, the rationality of the position of the dielectric film adjustment shaft is the first priority. The winding thickness does not fall within the winding thickness range, indicating that the angle formed by the dielectric film with the horizontal line when it is rolled onto the hollow winding device exceeds the range. At this time, in order to correctly reflect the pressure on the dielectric film, the position of the dielectric film adjustment shaft needs to be adjusted to a reasonable range to ensure the accuracy of the remaining data judgments.

[0099] For the winding thickness that does not fall within the winding thickness range, if the winding thickness is less than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment axis is higher, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment axis downward.

[0100] For the winding thickness that does not fall within the winding thickness range, if the winding thickness is greater than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment axis is low, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment axis upward.

[0101] The data processing unit determines the operating state of each component during adjustment according to the detected pressure value;

[0102] When the position of the medium film adjustment shaft is adjusted downward, the data processing unit determines the downward adjustment distance range according to the winding thickness, and the data processing unit determines the operating status of each component during the adjustment process according to the detected pressure value.

[0103] Above the hollow dielectric coil, through the preset point and the preset angle, the two tangents of the hollow dielectric coil, the position between the two intersections of the two tangents and the adjustment axis conveying slide rail is the ideal position range of the dielectric film adjustment axis, and the downward adjustment distance range is determined by the ideal position range.

[0104] For upward adjustment of the position of the dielectric film adjustment axis, the ideal position interval of the dielectric film adjustment axis is determined with reference to the determination process of downward adjustment of the position of the dielectric film adjustment axis, and the upward adjustment distance range is determined according to the ideal position interval.

[0105] By using the already formed winding thickness to reversely infer the ideal position range of the dielectric film adjustment axis when the dielectric film is nearly horizontally rolled onto the hollow winding device, the dielectric film adjustment axis and the dielectric film bonding area are restored to the preset range, thereby obtaining reasonable data information, ensuring the accuracy of the remaining data judgments, and further ensuring the stability of the hollow dielectric coil processing.

[0106] For downward adjustment of the dielectric film adjustment shaft, the data processing unit compares the detected pressure value with the median of the preset pressure value interval. For the pressure value greater than the median of the pressure value interval and not falling into the preset pressure value interval, the ratio between the pressure value and the median of the pressure value interval is calculated. During the downward adjustment of the dielectric film adjustment shaft, the speed of the circular motion of the edge of the hollow dielectric coil is a multiple of the inverse of the ratio of the downward adjustment movement speed. The data detected by the dielectric film pressure detection device is periodically acquired. When the detected pressure value reaches the lower limit value of the preset pressure value interval, the speed of the circular motion of the edge of the hollow dielectric coil is adjusted to be equal to the downward adjustment movement speed. After the position adjustment is completed, the hollow winding device resumes the rotation speed before the adjustment, and the speed of the dielectric film adjustment shaft movement is consistent with the speed of the circular motion of the edge of the hollow dielectric coil before the adjustment.

[0107] When the dielectric film adjustment shaft is adjusted downward, the length of the dielectric film between the hollow winding device and the dielectric film conveying shaft will increase, and the dielectric film adjustment shaft will also generate pressure on the dielectric film. The speed of the dielectric film conveying shaft is not switched during the adjustment process. For pressure values ​​that exceed the tolerance, the speed of the circular motion of the edge of the hollow dielectric coil is made less than the moving speed of the dielectric film conveying shaft, ensuring that the hollow dielectric coil is formed without stopping during the adjustment process. For pressure values ​​that are insufficient, the speed of the circular motion of the edge of the hollow dielectric coil is also made less than the moving speed of the dielectric film conveying shaft, but the standard value of comparison is different when reducing, making the regulation more targeted.

[0108] For downward adjustment of the dielectric film adjustment shaft, the data processing unit compares the detected pressure value with the median of the preset pressure value interval. For the pressure value that is less than the median of the pressure value interval and does not fall within the preset pressure value interval, the ratio of the pressure value to the lower limit of the pressure value interval is calculated. During the downward adjustment of the dielectric film adjustment shaft, the speed of the circular motion of the edge of the hollow dielectric coil is a multiple of the ratio of the downward adjustment movement speed. The data detected by the dielectric film pressure detection device is periodically acquired. When the detected pressure value falls within the preset pressure value interval, the speed of the circular motion of the edge of the hollow dielectric coil is adjusted to be equal to the downward adjustment movement speed. After the position adjustment is completed, the hollow winding device resumes the rotation speed before adjustment.

[0109] For upward adjustment of the dielectric film adjustment shaft, the data processing unit compares the detected pressure value with the median of the preset pressure value range. For the pressure value greater than the median of the pressure value range and not falling into the preset pressure value range, during the upward adjustment of the dielectric film adjustment shaft, the speed of the circular motion of the edge of the hollow dielectric coil is equal to the downward adjustment movement speed. After the position adjustment is completed, the hollow winding device restores the rotation speed before adjustment.

[0110] For upward adjustment of the dielectric film adjustment axis, the data processing unit compares the detected pressure value with the median of the preset pressure value interval. For the pressure value that is less than the median of the pressure value interval and does not fall into the preset pressure value interval, the ratio between the upper limit value of the pressure value interval and the pressure value is calculated. The speed of the circular motion of the edge of the hollow dielectric coil is a multiple of the ratio of the upward adjustment movement speed. The data detected by the dielectric film pressure detection device is periodically acquired. When the detected pressure value falls into the preset pressure value interval, the speed of the circular motion of the edge of the hollow dielectric coil is adjusted to be equal to the upward adjustment movement speed. After the position adjustment is completed, the hollow winding device resumes the rotation speed before adjustment.

[0111] When the dielectric film adjustment shaft is adjusted upward, the length of the dielectric film between the hollow winding device and the dielectric film conveying shaft will be reduced, and the tension on the dielectric film will be reduced. Therefore, for pressure values ​​greater than the pressure value range, its speed is consistent with the speed of the dielectric film adjustment shaft adjusted upward. For pressure values ​​less than the pressure value range, the speed of the circular motion of the edge of the hollow dielectric coil is increased during adjustment to ensure the rationality of the adjustment.

[0112] For adjusting the position of the dielectric film adjustment axis, the adjusted dielectric film adjustment axis is located at the midpoint of the ideal position interval.

[0113] If the winding thickness falls within the winding thickness range, and if the detected pressure value falls within the preset pressure value interval, each component maintains the current operation mode.

[0114] The speed adjustment of the hollow winding device includes:

[0115] S01, determining the magnitude relationship between the pressure value and the preset pressure value interval;

[0116] S02, determining whether the hollow winding device is accelerating or decelerating;

[0117] S03, determining the ratio of acceleration or deceleration of the hollow winding device according to the proportional relationship between the pressure value and the limit value of the preset pressure value interval.

[0118] If the winding thickness falls within the winding thickness range and if the detected pressure value does not fall within the preset pressure value interval, the speed of the hollow winding device is adjusted by combining the speed ratio of the hollow winding device and the medium film conveying shaft with the detected pressure value.

[0119] For pressure values ​​lower than the preset pressure value range, the hollow winding device accelerates and calculates the percentage below the lower limit value of the pressure value range. The hollow winding device determines its own speed-up percentage according to half of the calculated percentage value.

[0120] For pressure values ​​higher than the preset pressure value range, the hollow winding device accelerates and calculates the percentage higher than the upper limit value of the pressure value range. The hollow winding device determines its own speed-up percentage according to half of the calculated percentage value.

[0121] The speed of the hollow winding device is adjusted according to the excess ratio through the detected pressure value to ensure the accuracy of the adjustment.

[0122] Figure 5 Schematic diagram of a hollow large circular core package capacitor prepared in an embodiment, including a hollow large circular core package 101 and a shell 102 .

[0123] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0124] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a hollow large circular core capacitor, characterized in that: include, The metal film and the dielectric film are rolled up by the film rolling structure to form a hollow dielectric coil; Packaging the hollow dielectric coil to form a capacitor core package; The capacitor core package is placed in the housing and packaged to prepare a finished capacitor; The process of forming the hollow dielectric coil includes: Pre-winding the dielectric film on a hollow winding device; After the dielectric film is pre-wound on the hollow winding device for several turns, the metal film is wound onto the hollow winding device, and at the same time, the spraying structure is started to spray the surface of the dielectric film; The medium film pressure detection device detects the pressure borne by the medium film during the winding process, the position adjustment module obtains the position information of the medium film adjustment shaft, and the visual detection module detects the thickness of the winding on the hollow winding device; The data processing unit determines whether it is necessary to adjust the position of the medium film adjusting shaft or adjust the rotation speed of the hollow winding device through the detected pressure value of the medium film, the position information of the medium film adjusting shaft and the winding thickness; The process of the data processing unit determining the corresponding winding thickness range through the position information of the medium film adjustment shaft includes: Two oblique lines are made below the dielectric film adjustment shaft through preset points and preset angles toward the hollow winding device; Make two concentric circles with the center of the hollow winding device as the center, and the two concentric circles are tangent to the two oblique lines respectively; The area corresponding to the complement of the two concentric circles is taken as the winding thickness range; The data processing unit compares the obtained winding thickness with the winding thickness range. If the winding thickness falls within the winding thickness range, the pressure value is compared to determine whether the winding state is normal; If the winding thickness does not fall within the winding thickness range, the position of the medium film adjustment shaft is re-determined; For the winding thickness that does not fall within the winding thickness range, if the winding thickness is less than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment shaft is higher, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment shaft downward; The data processing unit determines the downward adjustment distance range according to the winding thickness, and determines the moving speed of the medium film adjustment shaft during the adjustment process, or the operating state of the hollow winding device speed according to the detected pressure value.

2. The method for manufacturing a hollow large circular core capacitor according to claim 1, characterized in that: The order for determining whether it is necessary to adjust the position of the medium film adjustment shaft or adjust the speed of the hollow winding device is: First, determine whether the position of the medium film adjustment shaft is reasonable based on the pressure value borne by the medium film, the position information of the medium film adjustment shaft and the data information of the winding thickness, and then determine whether the rotation speed of the hollow winding device is reasonable.

3. The method for manufacturing a hollow large circular core capacitor according to claim 2, characterized in that: For the winding thickness that does not fall within the winding thickness range, if the winding thickness is greater than the preset winding thickness range, the data processing unit determines that the position of the medium film adjustment shaft is low, and the data processing unit sends a position adjustment instruction to the position adjustment module to adjust the position of the medium film adjustment shaft upward; The data processing unit determines the upward adjustment distance range according to the winding thickness, and determines the moving speed of the medium film adjustment shaft during the adjustment process, or the operating state of the hollow winding device speed according to the detected pressure value.

4. The method for manufacturing a hollow large circular core capacitor according to claim 3, characterized in that: Two tangents of the hollow dielectric coil are determined above the hollow dielectric coil by preset points and preset angles. The range between the two intersections of the two tangents and the two intersections of the adjustment axis conveying slide rail is the ideal position range of the dielectric film adjustment axis. The adjustment distance range of the dielectric film adjustment axis is determined by the ideal position range.

5. The method for manufacturing a hollow large circular core capacitor according to claim 4, characterized in that: When the dielectric film adjusting shaft is adjusting its position, the relationship between the moving speed of the dielectric film adjusting shaft and the speed of the hollow winding device is determined by comparing the detected pressure value with the preset pressure value interval.

6. The method for manufacturing a hollow large circular core capacitor according to claim 1, characterized in that: If the winding thickness falls within the winding thickness range, and the detected pressure value falls within the preset pressure value interval, each component maintains the current operation mode; If the winding thickness falls within the winding thickness range and the detected pressure value does not fall within the preset pressure value interval, the speed of the hollow winding device is adjusted.

7. The method for manufacturing a hollow large circular core capacitor according to claim 6, characterized in that: Adjusting the speed of the hollow winding device includes determining the magnitude relationship between the pressure value and the preset pressure value interval; Determine whether the hollow winding device is accelerating or decelerating; The ratio of acceleration or deceleration of the hollow winding device is determined according to the proportional relationship between the pressure value and the limit value of the preset pressure value interval.

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