Novel high-safety metallized film resonant capacitor

Abstract

The invention discloses a novel high-safety metallized film resonant capacitor, which comprises a first electrode layer, a polypropylene light film and a second electrode layer which are sequentially stacked from top to bottom, and is characterized in that the first electrode layer comprises a first metallized polypropylene aluminum film and a second metallized polypropylene aluminum film, and a gap is reserved between the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film; the metal aluminum layer of the first metallized polypropylene aluminum film and the metal aluminum layer of the second metallized polypropylene aluminum film are oppositely arranged in a stacked mode, and the second electrode layer is a third metallized polypropylene aluminum film with gaps reserved on the two sides of the metal aluminum layer. According to the invention, a double-sided metalized polyester aluminum film in the prior art is changed into two metalized polypropylene aluminum films, even if a dislocation error exists in a gap between metal aluminum layers of the two metalized polypropylene aluminum films, so that C3 and C4 small capacitors are equivalently connected in parallel in a circuit, but mediums of the C3 and C4 small capacitors which are connected in parallel are polypropylene films with very small loss, so that the dielectric loss of the capacitor C3 and the capacitor C4 is greatly reduced. Under the working condition of high frequency and large current, the heat generated by the small capacitors C3 and C4 is limited, so that the safety problems of breakdown or fire and the like of the product are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of film resonant capacitors, and in particular to a novel high-safety metallized film resonant capacitor. Background Art

[0002] Metallized film capacitors are the main electronic components in electronic equipment. Metallized film capacitors adopt a metallized film non-inductive winding structure, with good self-healing performance, high insulation resistance and stable capacitance. They are suitable for DC and pulsating circuits and are widely used in filtering, resonance, DC isolation, bypass, coupling and noise reduction in various electronic appliances, electrical equipment, and new energy fields.

[0003] Among them, metallized film resonant capacitors are mainly used in resonant circuits. The characteristics of this circuit are high frequency and large current. Because metallized film resonant capacitors have stable frequency characteristics, high voltage resistance and safety performance, they are also widely used in this field.

[0004] like Figure 6 As shown in the figure, the existing metallized film resonant capacitor structure mainly adopts a double-sided metal film structure, including a double-sided metallized polyester aluminum film, a polypropylene film and a metallized polypropylene aluminum film stacked from top to bottom. There is a gap between the upper and lower metal aluminum layers of the double-sided metallized polyester aluminum film, and there is a gap at both ends of the metal aluminum layer of the metallized polypropylene aluminum film. It can be seen from the structure that the metallized film resonant capacitor of this structure can theoretically be equivalent to two capacitors C1 and C2 whose dielectric is polypropylene film (such as Figure 6 However, in the actual production process, there will be errors in the gap shielding area between the upper and lower metal layers of the double-sided metallized polyester aluminum film, which will result in the following Figure 7 There is a misalignment error between the gap S7 and the gap S8. Figure 7 It can be seen from the structure that the metallized film resonant capacitor of this structure can theoretically be equivalent to two capacitors C1 and C2 whose dielectric is polypropylene film connected in series. At the same time, the existence of this error will lead to the parallel connection of small capacitors C3 and C4 whose dielectric is a mixture of polyester and polypropylene film in the actual equivalent circuit of the capacitor (such as Figure 7 ) as shown.

[0005] Because the dielectric loss of polyester film is generally 0.005, and the dielectric loss of polypropylene film is generally 0.0002, it can be seen from this data comparison that when polyester film is used as a dielectric, the loss of capacitance will increase significantly. Under high-frequency and high-current conditions, small capacitors C3 and C4 will generate heat, causing a sharp increase in heat inside the metallized film capacitor, and the temperature will rise. The product will eventually break down, and in severe cases, fire and other safety issues will occur. Summary of the invention

[0006] In order to solve the problem that the existing metallized film resonant capacitor has a misalignment error in the gap between the upper and lower metal aluminum layers of the double-sided metallized polyester aluminum film, under the condition of high frequency and high current, the small capacitors C3 and C4 will generate heat, resulting in a sharp increase in heat inside the metallized film capacitor, a rise in temperature, and a product breakdown. In severe cases, a fire may occur. The present invention provides a new type of high-safety metallized film resonant capacitor, which changes the double-sided metallized polyester aluminum film into two metallized polypropylene aluminum films with a gap in the middle. Even if there is a misalignment error in the gap between the metal aluminum layers of the two metallized polypropylene aluminum films, a new type of high-safety metallized film resonant capacitor is formed. Figure 3 and Figure 5 The equivalent capacitance is shown in the figure, but because the dielectrics of the small capacitors C3 and C4 connected in parallel are both polypropylene films with very low loss, under the working conditions of high frequency and large current, the heat generated by the small capacitors C3 and C4 is limited, thus avoiding the rapid increase of heat inside the capacitor, the temperature rise, the final breakdown of the product, and in severe cases, safety problems such as fire.

[0007] To achieve the above-mentioned purpose, the present invention provides a novel high-safety metallized film resonant capacitor, comprising a first electrode layer, a polypropylene optical film and a second electrode layer stacked in sequence from top to bottom, wherein the first electrode layer comprises a first metallized polypropylene aluminum film and a second metallized polypropylene aluminum film, the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, and a gap is left in the middle of the metal aluminum layer, the metal aluminum layer of the first metallized polypropylene aluminum film and the metal aluminum layer of the second metallized polypropylene aluminum film are arranged relatively stacked, and the second electrode layer is set as a third metallized polypropylene aluminum film, the third metallized polypropylene aluminum film is formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, gaps are left on both sides of the metal aluminum layer, and the metal aluminum layer is arranged toward the polypropylene optical film.

[0008] As a further improvement of the present technology, a new high-safety metallized film resonant capacitor includes a first electrode layer and a second electrode layer stacked in sequence from top to bottom, the first electrode layer includes a first metallized polypropylene aluminum film and a second metallized polypropylene aluminum film, the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, a gap is left in the middle of the metal aluminum layer, and the metal aluminum layer of the first metallized polypropylene aluminum film and the metal aluminum layer of the second metallized polypropylene aluminum film are relatively stacked, the second electrode layer includes a third metallized polypropylene aluminum film and a fourth metallized polypropylene aluminum film, the third metallized polypropylene aluminum film and the fourth metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, a gap is left on both sides of the metal aluminum layer, and the metal aluminum layer of the third metallized polypropylene aluminum film and the metal aluminum layer of the fourth metallized polypropylene aluminum film are relatively stacked.

[0009] As a further improvement of the present technology, the left and right edges of the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both cut into wavy edges.

[0010] The wavy edge can increase the contact with the extraction electrode.

[0011] As a further improvement of the present technology, a first gap is provided in the middle of the metal aluminum layer of the first metallized polypropylene aluminum film, and the width of the first gap is set to S1; a second gap is provided in the middle of the metal aluminum layer of the second metallized polypropylene aluminum film, and the width of the second gap is set to S2, S1=S2, and the range values ​​of S1 and S2 are set to 2 to 3 mm. The first gap corresponds to the second gap in upper and lower positions, and the allowable misalignment error is 0 to 0.5 mm.

[0012] As a further improvement of the present technology, a third gap and a fourth gap are respectively provided on both sides of the metal aluminum layer of the third metallized polypropylene aluminum film, the width of the third gap is set to S3, the width of the fourth gap is set to S4, S3=S4, and the range values ​​of S3 and S4 are 1 to 2 mm.

[0013] As a further improvement of the present technology, a third gap and a fourth gap are respectively provided on both sides of the metal aluminum layer of the third metallized polypropylene aluminum film, the width of the third gap is set to S3, the width of the fourth gap is set to S4, S3=S4, and the range values ​​of S3 and S4 are 1 to 2 mm; a fifth gap and a sixth gap are respectively provided on both sides of the metal aluminum layer of the fourth metallized polypropylene aluminum film, the width of the fifth gap is set to S5, the width of the sixth gap is set to S6, S5=S6, and the range values ​​of S5 and S6 are 1 to 2 mm.

[0014] As a further improvement of the present technology, the metallized thin film resonant capacitor is manufactured by a non-inductive winding method. The capacitor wound by the non-inductive winding method exhibits better performance in high-frequency circuits and can reduce signal distortion and energy loss caused by distributed inductance.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention changes the double-sided metallized polyester aluminum film into two metallized polypropylene aluminum films with a gap in the middle, so that even if there is a misalignment error in the gap between the metal aluminum layers of the two metallized polypropylene aluminum films, the gap between the metal aluminum layers of the two metallized polypropylene aluminum films is not misaligned. Figure 3 and Figure 5 The equivalent capacitance is shown, but because the dielectrics of the small capacitors C3 and C4 connected in parallel are both polypropylene films with very low losses, under high-frequency and high-current conditions, the heat generated by the small capacitors C3 and C4 is limited, thus avoiding a sharp increase in heat inside the capacitor, temperature rise, and eventual breakdown of the product. In severe cases, safety issues such as fire may occur. At the same time, the use of a non-inductive winding method greatly reduces the loss of the product, reduces the internal heat of the product, and ultimately improves the product's overcurrent capability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram of the theoretical structure of the embodiment 1 of the present invention and its equivalent circuit diagram; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 The actual structure diagram of the embodiment 1 of the present invention and its equivalent circuit diagram; Figure 4 The schematic diagram of the theoretical structure of Embodiment 2 of the present invention and its equivalent circuit diagram; Figure 5 The actual structure diagram and equivalent circuit diagram of embodiment 2 of the present invention are shown in FIG. Figure 6 It is a schematic diagram of the theoretical structure of the existing metallized film resonant capacitor and its equivalent circuit diagram; Figure 7 It is a schematic diagram of the actual structure of the existing metallized film resonant capacitor and its equivalent circuit diagram.

[0017] In the figure: 1. a first metallized polypropylene aluminum film, 101. a first polypropylene film, 102. a first metal aluminum layer, 2. a second metallized polypropylene aluminum film, 201. a second polypropylene film, 202. a second metal aluminum layer, 3. a polypropylene optical film, 4. a third metallized polypropylene aluminum film, 401. a third polypropylene film, 402. a third metal aluminum layer, 5. a fourth metallized polypropylene aluminum film, 501. a fourth polypropylene film, 502. a fourth metal aluminum layer, 6. a double-sided metallized polyester aluminum film, 601. a polyester film, 602. a fifth metal aluminum layer, 603. a sixth metal aluminum layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, embodiment 1 of the present invention: The invention comprises a first electrode layer, a polypropylene optical film 3 and a second electrode layer stacked in sequence from top to bottom, wherein the first electrode layer comprises a first metallized polypropylene aluminum film 1 and a second metallized polypropylene aluminum film 2, wherein the first metallized polypropylene aluminum film 1 is formed by single-sided vapor deposition of a first metal aluminum layer 102 containing aluminum on a first polypropylene film 101, and a first gap is left in the middle of the first metal aluminum layer 102, and the width of the first gap is set to S1, S1=2mm, and the second metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a second metal aluminum layer 202 containing aluminum on a second polypropylene film 201, and the first metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a second metal aluminum layer 202 containing aluminum on a second polypropylene film 201, and the first metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a second metal aluminum layer 202 containing aluminum on a second polypropylene film 201, and the first metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a first metal aluminum layer 102 containing aluminum on a first metal aluminum layer 102, and the first metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a first metal aluminum layer 102 containing aluminum on a first metal aluminum layer 102, and the first metallized polypropylene aluminum film 2 is formed by single-sided vapor deposition of a first metal aluminum layer 102 containing aluminum on a second ... A second gap is left in the middle of the two metal aluminum layers 202, and the width of the second gap is set to S2, S2=2mm, the first metal aluminum layer 102 of the first metallized polypropylene aluminum film 1 and the second metal aluminum layer 202 of the second metallized polypropylene aluminum film 2 are relatively stacked; the second electrode layer is set to the third metallized polypropylene aluminum film 4, and the third metallized polypropylene aluminum film 4 is formed by single-sided vapor deposition of a third metal aluminum layer 402 containing aluminum on a third polypropylene film 401, and a third gap and a fourth gap are respectively left on both sides of the third metal aluminum layer 402, the width of the third gap is set to S3, and the width of the fourth gap is set to S4, S3=S4=1mm.

[0020] like Figure 2 As shown, the left and right edges of the first metallized polypropylene aluminum film 1 and the second metallized polypropylene aluminum film 2 are cut into wavy edges. The wavy edges can increase the contact with the lead-out electrode.

[0021] The metallized thin film resonant capacitor of the first embodiment is manufactured by a non-inductive winding method. The capacitor wound by the non-inductive winding method exhibits better performance in high-frequency circuits and can reduce signal distortion and energy loss caused by distributed inductance.

[0022] Theoretically, in this embodiment 1, the first gap and the second gap have the same width, and the upper and lower positions completely correspond to each other, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series.

[0023] like Figure 3 As shown, in the actual production process of this embodiment 1, the width of the first gap is equal to that of the second gap, but misalignment errors may occur in the upper and lower positions, and the misalignment errors are set to 0-0.5 mm, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series, and capacitor C1 is connected in parallel with a small capacitor C3, and capacitor C2 is connected in parallel with a small capacitor C4, and both C3 and C4 are metallized film capacitors whose dielectrics are polypropylene films, and the dielectric loss of polypropylene films is generally 0.0002. Under high-frequency and high-current conditions, although small capacitors C3 and C4 will generate heat, it will not cause a sharp increase in heat inside the metallized film capacitor, and the temperature will not rise, and the product will not have safety problems such as breakdown or fire.

[0024] like Figure 4As shown, embodiment 2 of the present invention: The invention comprises a first electrode layer and a second electrode layer stacked in sequence from top to bottom, wherein the first electrode layer comprises a first metallized polypropylene aluminum film 1 and a second metallized polypropylene aluminum film 2, wherein the first metallized polypropylene aluminum film 1 is formed by vapor-depositing a first aluminum-containing metal layer 102 on a first polypropylene film 101 on one side, and a first gap is left in the middle of the first aluminum layer 102, and the first gap width is set to S1, S1=3mm, the second metallized polypropylene aluminum film 2 is formed by vapor-depositing a second aluminum-containing metal layer 202 on a second polypropylene film 201 on one side, and a second gap is left in the middle of the second aluminum layer 202, and the second gap width is set to S2, S2=3mm, and the first aluminum layer 102 of the first metallized polypropylene aluminum film 1 and the second aluminum layer 202 of the second metallized polypropylene aluminum film 2 are relatively stacked; the second electrode layer comprises The third metallized polypropylene aluminum film 4 and the fourth metallized polypropylene aluminum film 5, the third metallized polypropylene aluminum film 1 is formed by vapor-depositing a third metal aluminum layer 402 containing aluminum on a single side of a third polypropylene film 401, and a third gap and a fourth gap are respectively left on both sides of the third metal aluminum layer 402, the widths of the third gap and the fourth gap are respectively set to S3 and S4, S3=S4=2mm, the fourth metallized polypropylene aluminum film 5 is formed by vapor-depositing a fourth metal aluminum layer 502 containing aluminum on a single side of a fourth polypropylene film 501, and a fifth gap and a sixth gap are respectively left on both sides of the fourth metal aluminum layer 502, the widths of the fifth gap and the sixth gap are respectively set to S5 and S6, S5=S6=2mm, the third metal aluminum layer 402 of the third metallized polypropylene aluminum film 4 and the fourth metal aluminum layer 502 of the fourth metallized polypropylene aluminum film 5 are relatively stacked.

[0025] In Example 2, the left and right edges of the first metallized polypropylene aluminum film 1 and the second metallized polypropylene aluminum film 2 are cut into wavy edges. The wavy edges can increase the contact with the lead-out electrode.

[0026] The metallized thin film resonant capacitor of the second embodiment is manufactured by non-inductive winding. The capacitor wound by the non-inductive winding method shows better performance in high-frequency circuits and can reduce signal distortion and energy loss caused by distributed inductance.

[0027] Theoretically, in this embodiment 2, the first gap and the second gap have the same width, and the upper and lower positions completely correspond to each other, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series.

[0028] like Figure 5As shown, in the actual production process of Example 2, the width of the first gap is equal to that of the second gap, but misalignment errors may occur in the upper and lower positions, and the misalignment errors are set to 0-0.5 mm, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series, and capacitor C1 is connected in parallel with a small capacitor C3, and capacitor C2 is connected in parallel with a small capacitor C4, and both C3 and C4 are metallized film capacitors whose dielectrics are polypropylene films, and the dielectric loss of polypropylene films is generally 0.0002. Under high-frequency and high-current conditions, although small capacitors C3 and C4 will generate heat, it will not cause a sharp increase in heat inside the metallized film capacitors, causing the temperature to rise, and the product will not have safety problems such as breakdown or fire.

[0029] like Figure 6 As shown, comparative example: It includes a first electrode layer, a polypropylene optical film 3 and a second electrode layer stacked in sequence from top to bottom. The first electrode layer is a double-sided metallized polyester aluminum film, which is formed by vapor-depositing a fifth metal aluminum layer 602 and a sixth metal aluminum layer 603 containing aluminum on the upper and lower surfaces of a polyester film 601, respectively. A seventh gap and an eighth gap are respectively left in the middle of the fifth metal aluminum layer 602 and the sixth metal aluminum layer 603. The widths of the seventh gap and the eighth gap are respectively set to S7 and S8, and S7=S8=2mm; the second electrode layer is set to a third metallized polypropylene aluminum film 4, which is formed by vapor-depositing a third metal aluminum layer 402 containing aluminum on a single side of a third polypropylene film 401, and leaving a third gap and a fourth gap on both sides of the third metal aluminum layer 402, respectively. The width of the third gap is set to S3, and the width of the fourth gap is set to S4, and S3=S4=1mm.

[0030] Theoretically, in the comparative example, the seventh gap and the eighth gap have the same width, and the upper and lower positions completely correspond to each other, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series.

[0031] like Figure 7 As shown, in the actual production process of the comparative example, the width of the seventh gap is equal to that of the eighth gap, but there will be misalignment errors in the upper and lower positions, and the misalignment errors are 0 to 0.5 mm, which is equivalent to two metallized film capacitors C1 and C2 whose dielectrics are polypropylene films connected in series, and capacitor C1 is connected in parallel with a small capacitor C3, and capacitor C2 is connected in parallel with a small capacitor C4, and the dielectrics of the small capacitors C3 and C4 are both a mixture of polyester film and polypropylene film.

[0032] The dielectric loss of polyester film is generally 0.005, while the dielectric loss of polypropylene film is generally 0.0002. From this data comparison, it can be seen that when polyester film is used as a dielectric, the loss of capacitance will increase significantly. Under high-frequency and high-current conditions, small capacitors C3 and C4 will generate heat, causing a sharp increase in heat inside the metallized film capacitor. The temperature rises and the product eventually breaks down. In severe cases, fire and other safety issues may occur.

[0033] Performance test: Examples 1, 2 and the comparative example were made into metallized thin film resonant capacitor products with a capacity of 12nF, and three pieces of each of Examples 1, 2 and the comparative example products were subjected to high-frequency current temperature rise test. The test conditions were: ambient temperature 125°C, current effective value 3.75A, frequency 100Khz. The experimental results are shown in Table 1. Table 1

[0034] It can be seen from the data in Table 1 that even if the misalignment error of the upper and lower gaps in the first electrode layer of Examples 1 and 2 reaches 0.5 mm, the metallized film resonant capacitor product will not be broken down or burned out under the working conditions of high frequency and large current (3.75A, 100Khz), while the misalignment error in the comparative example reaches 0.2 mm, and the metallized film resonant capacitor product will be broken down under the working conditions of high frequency and large current ((3.75A, 100Khz), and the misalignment error reaches 0.3 mm, and the metallized film resonant capacitor product will be burned out under the working conditions of high frequency and large current ((3.75A, 100Khz).

[0035] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A new type of high-safety metallized film resonant capacitor, characterized by: It includes a first electrode layer, a polypropylene optical film and a second electrode layer stacked in sequence from top to bottom, the first electrode layer includes a first metallized polypropylene aluminum film and a second metallized polypropylene aluminum film, the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, and a gap is left in the middle of the metal aluminum layer, the metal aluminum layer of the first metallized polypropylene aluminum film and the metal aluminum layer of the second metallized polypropylene aluminum film are relatively stacked, the second electrode layer is set as a third metallized polypropylene aluminum film, the third metallized polypropylene aluminum film is formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, gaps are left on both sides of the metal aluminum layer, and the metal aluminum layer is arranged toward the polypropylene optical film.

2. A novel high-safety metallized film resonant capacitor according to claim 1, characterized in that: It includes a first electrode layer and a second electrode layer stacked in sequence from top to bottom, the first electrode layer includes a first metallized polypropylene aluminum film and a second metallized polypropylene aluminum film, the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, a gap is left in the middle of the metal aluminum layer, and the metal aluminum layer of the first metallized polypropylene aluminum film and the metal aluminum layer of the second metallized polypropylene aluminum film are relatively stacked, the second electrode layer includes a third metallized polypropylene aluminum film and a fourth metallized polypropylene aluminum film, the third metallized polypropylene aluminum film and the fourth metallized polypropylene aluminum film are both formed by a metal aluminum layer containing aluminum vapor-deposited on a single side of a polypropylene film, a gap is left on both sides of the metal aluminum layer, and the metal aluminum layer of the third metallized polypropylene aluminum film and the metal aluminum layer of the fourth metallized polypropylene aluminum film are relatively stacked.

3. A novel high-safety metallized film resonant capacitor according to claim 1, characterized in that: The left and right edges of the first metallized polypropylene aluminum film and the second metallized polypropylene aluminum film are both cut into wavy edges.

4. A novel high-safety metallized film resonant capacitor according to claim 1 or 2, characterized in that: A first gap is provided in the middle of the metal aluminum layer of the first metallized polypropylene aluminum film, and the width of the first gap is set to S1. A second gap is provided in the middle of the metal aluminum layer of the second metallized polypropylene aluminum film, and the width of the second gap is set to S2. S1=S2. The range values ​​of S1 and S2 are set to 2 to 3 mm. The first gap corresponds to the second gap in upper and lower positions, and the allowable misalignment error is 0 to 0.5 mm.

5. The novel high-safety metallized film resonant capacitor according to claim 1 is characterized in that: A third gap and a fourth gap are respectively provided on both sides of the metal aluminum layer of the third metallized polypropylene aluminum film. The width of the third gap is set to S3, and the width of the fourth gap is set to S4. S3=S4. The range of S3 and S4 is 1-2 mm.

6. A novel high-safety metallized film resonant capacitor according to claim 2, characterized in that: A third gap and a fourth gap are respectively provided on both sides of the metal aluminum layer of the third metallized polypropylene aluminum film, the width of the third gap is set to S3, the width of the fourth gap is set to S4, S3=S4, and the range values ​​of S3 and S4 are 1 to 2 mm; a fifth gap and a sixth gap are respectively provided on both sides of the metal aluminum layer of the fourth metallized polypropylene aluminum film, the width of the fifth gap is set to S5, the width of the sixth gap is set to S6, S5=S6, and the range values ​​of S5 and S6 are 1 to 2 mm.

7. A novel high-safety metallized film resonant capacitor according to any one of claims 1 to 7, characterized in that: The metallized film resonant capacitor is manufactured by a non-inductive winding method. The capacitor wound by the non-inductive winding method exhibits better performance in high-frequency circuits and can reduce signal distortion and energy loss caused by distributed inductance.

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