Metallized film, film capacitor, inverter, and vehicle

Abstract

The present disclosure addresses the problem of providing a metallized film in which the path of current flowing through an electrode is less likely to be long and the electrode is less likely to have a decreased effective area. A metallized film 3 is provided with a dielectric film 4 and an electrode part 5 disposed on a first surface 81 of the dielectric film 4. The electrode part 5 includes a plurality of divisional electrodes 6 and fuse parts 7 each interposed between two adjacent divisional electrodes 6 among the plurality of divisional electrodes 6. The two adjacent divisional electrodes 6 are connected with each other with a fuse part 7 therebetween. The fuse parts 7 each include a first fuse portion 71 including a plurality of fuses 9. The first fuse portion 71 has a first fuse 91 having a line width narrower than that of the other fuse 9, among the plurality of fuses 9.

Description

Metallized Film, Film Capacitor, Inverter, and Vehicle

[0001] This disclosure generally relates to a metallized film, a film capacitor, an inverter, and a vehicle, and more particularly to a metallized film, a film capacitor, an inverter, and a vehicle that utilize a dielectric.

[0002] Patent Document 1 discloses a metallized film capacitor in which a metallized film having a metal vapor deposition surface vapor-deposited on at least one side, excluding an insulating margin provided at one end of a separate dielectric film or at one end of both the front and back surfaces of the same dielectric film, is wound or laminated such that each insulating margin is located on the opposite side, and metallicons are formed at both ends in the width direction of the metallized film. Patent Document 1 discloses that the metal film capacitor includes a metallicon connection portion in which the metal vapor deposition surface is connected to a metallicon at one end in the width direction of the metallized film, and a plurality of rectangular divided metal vapor deposition electrodes arranged in the width direction of the metallized film, and the plurality of rectangular divided metal vapor deposition electrodes increase the metal vapor deposition area as they approach the metallicon connection portion and are connected by one fuse portion each arranged in the film width direction. Patent Document 1 discloses that since the areas of the plurality of rectangular divided metal vapor deposition electrodes connected by one fuse portion each arranged in the film width direction increase as they approach the metallicon connection portion, a metal film capacitor with excellent high-temperature durability can be obtained.

[0003] It is desired that the equivalent series resistance (ESR: Equivalent Series Resistance) of the metallized film capacitor as described above does not easily increase and the capacitance does not easily decrease.

[0004] Japanese Unexamined Patent Application Publication No. 2009-094543

[0005] An object of this disclosure is to provide a metallized film, a film capacitor, an inverter, and a vehicle in which the path of the current flowing through the electrode does not easily become long and the effective area of the electrode does not easily decrease.

[0006] A metallized film according to one aspect of the present disclosure comprises a dielectric film and an electrode portion disposed on a first surface of the dielectric film. The electrode portion has a plurality of segmented electrodes and a fuse portion interposed between two adjacent segmented electrodes. The two adjacent segmented electrodes are connected via the fuse portion. The fuse portion includes a first fuse portion having a plurality of fuses. The first fuse portion has a first fuse among the plurality of fuses having a narrower wire width than the other fuses.

[0007] A film capacitor according to one aspect of the present disclosure comprises the metallized film.

[0008] An inverter according to one aspect of the present disclosure includes the film capacitor.

[0009] A vehicle according to one aspect of this disclosure is equipped with the inverter.

[0010] Figure 1 is an explanatory diagram showing a metallized film according to an embodiment of the present disclosure. Figure 2 is an explanatory diagram of portion a of Figure 1. Figure 3 is an explanatory diagram of a partial modification of the metallized film according to an embodiment of the present disclosure. Figure 4 is an explanatory diagram of a partial modification of the metallized film according to an embodiment of the present disclosure. Figure 5 is an explanatory diagram of a partial modification of the metallized film according to an embodiment of the present disclosure. Figure 6 is an explanatory diagram of a partial modification of the metallized film according to an embodiment of the present disclosure.

[0011] 1. Overview The metallized film 3 according to the embodiment will be described with reference to the figures. Note that each figure is a schematic diagram, and the ratios of the size and thickness of each component in each figure do not necessarily reflect the actual dimensional ratios. Also, the arrows indicating each direction in each figure are not intended to define the direction in which the metallized film 3 is used, but are merely indicated to make the explanation easier to understand and do not represent actual dimensions. The first direction D1 is the short side direction (width direction) of the dielectric film 4 and is sometimes called the "left-right direction". The second direction D2 is the long side direction of the dielectric film 4 and is sometimes called the "front-back direction". Although not shown in the figures, the direction perpendicular to the first direction D1 and the second direction D2 is called the third direction D3. The third direction D3 is the thickness direction of the dielectric film 4. The first direction D1, the second direction D2, and the third direction D3 are mutually orthogonal. Viewing the metallized film 3 along the third direction D3 is called a plan view.

[0012] When an excessive current flows through a film capacitor made from a metallized film 3 having electrodes divided into multiple regions, dielectric breakdown may occur in the film capacitor. When dielectric breakdown occurs, the electrodes surrounding the broken-down portion may evaporate, potentially restoring the insulation. However, if the insulation does not recover, the fuse 9 connecting the multiple regions will blow, separating the region where dielectric breakdown occurred from the surrounding regions. As a result, dielectric breakdown of the film capacitor may be prevented. However, when the fuse 9 blows, the regions that were connected to the blown fuse 9 are electrically disconnected. This can lengthen the current path through the electrodes of the metallized film 3 and reduce the effective area of ​​the electrodes. As a result, the equivalent series resistance (ESR) of the metallized film capacitor may increase, and its capacitance may decrease. Therefore, through diligent research and development, the inventor has developed a metallized film 3 that does not easily lengthen the current path through the electrodes and does not easily reduce the effective area of ​​the electrodes.

[0013] The metallized film 3 according to this embodiment comprises a dielectric film 4 and an electrode portion 5 disposed on a first surface 81 of the dielectric film 4. The electrode portion 5 has a plurality of divided electrodes 6 and a fuse portion 7 interposed between two adjacent divided electrodes 6. The two adjacent divided electrodes 6 are connected via the fuse portion 7. The fuse portion 7 includes a first fuse portion 71 having a plurality of fuses 9. The first fuse portion 71 has a first fuse 91 among the plurality of fuses 9 that has a narrower wire width than the other fuses 9.

[0014] The metallized film 3 having the above configuration does not easily increase the length of the current path flowing through the electrodes, and the effective area of ​​the electrodes does not easily decrease. The reason for this is as follows.

[0015] The metallized film 3 according to this embodiment includes an electrode portion 5, the electrode portion 5 having a first fuse portion 71 having a plurality of fuses 9. Of the plurality of fuses 9 in the first fuse portion 71, the wire width of the first fuse 91 is shorter than that of the other fuses 9. Therefore, when an excessive current flows through the film capacitor equipped with the metallized film 3, the first fuse 91 is more likely to blow. When the first fuse 91 blows, the current flowing through the film capacitor is moderately interrupted. This suppresses dielectric breakdown of the film capacitor. On the other hand, even when an excessive current flows through the film capacitor equipped with the metallized film 3, the other fuses 9 in the first fuse portion 71, other than the first fuse 91, are less likely to blow and remain intact. Therefore, adjacent divided electrodes 6 connected to the first fuse portion 71 are less likely to be electrically disconnected. As a result, the current path flowing through the electrodes of the metallized film 3 is less likely to become long, and the effective area of ​​the electrodes of the metallized film 3 is less likely to decrease.

[0016] Furthermore, the effective area of ​​the electrodes of the metallized film 3 refers to the area of ​​the electrodes arranged on the metallized film 3 that can function as electrodes of a film capacitor. The part that functions as an electrode of a film capacitor means that it is at the same potential, for example, by being electrically connected and conducting through a conductor.

[0017] 2. Details 2.1 Configuration The specific configuration of the metallized film 3 according to the embodiment will be described.

[0018] The metallized film 3 comprises a dielectric film 4. The dielectric film 4 is a film composed of a dielectric material. The dielectric material includes, for example, at least one material selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polycarbonate (PC), and polystyrene (PS). The dielectric film 4 has a constant width in a first direction D1, extends in a second direction D2, and has a constant thickness in a third direction D3.

[0019] The dielectric film 4 has a first surface 81 and a second surface 82. The first surface 81 is the top surface. The second surface 82 is the surface opposite to the first surface 81. In other words, the second surface 82 is the bottom surface. The thickness of the dielectric film 4 is the distance between the first surface 81 and the second surface 82, and is not particularly limited, but for example, it is between 1.0 μm and 10.0 μm.

[0020] The dielectric film 4 has a first end 41 and a second end 42 opposite to the first end 41 in a first direction D1 (width direction). The first surface 81 has a margin portion 43 on the second end 42 side where the electrode portion 5 is not located. The margin portion 43 is a narrow strip-shaped portion (see Figure 1). That is, the margin portion 43 has a width in the first direction D1 and extends in the second direction D2. The length of the width of the margin portion 43 in the first direction D1 is, for example, 0.4 μm or more and 4.0 μm or less.

[0021] The metallized film 3 includes an electrode portion 5. The electrode portion 5 may contain at least one metal selected from the group consisting of aluminum (Al), gold (Au), magnesium (Mg), zinc (Zn), tin (Sn), nickel (Ni), chromium (Cr), iron (Fe), copper (Cu), and titanium (Ti). The thickness of the electrode portion 5 is not particularly limited, but is, for example, 3 nm to 100 nm.

[0022] The electrode portion 5 is arranged on the first surface 81 of the dielectric film 4. The electrode portion 5 has a plurality of divided electrodes 6. More specifically, the electrode portion 5 has a plurality of divided electrodes 6 arranged in a first direction D1 (width direction). The electrode portion 5 may also have a plurality of divided electrodes 6 arranged in a second direction D2 (front-to-back direction). The areas of the plurality of divided electrodes 6 may be the same or different. The shapes of the plurality of divided electrodes 6 in plan view may be the same or different. For example, the electrode portion 5 has a first divided electrode 61 and a plurality of second divided electrodes 62 (see Figure 1). The first divided electrode 61 is the divided electrode 6 closest to the first end 41. The first divided electrode 61 has a width in the first direction D1 and extends in the second direction D2. The shape of the first divided electrode 61 in plan view is strip-shaped. The second divided electrodes 62 are arranged on the second end 42 side when viewed from the first divided electrode 61. The second divided electrodes 62 are arranged in a line in the first direction D1. The second divided electrodes 62 are arranged in a line in the second direction D2. In other words, multiple second divided electrodes 62 are arranged in a matrix on the second end 42 side when viewed from the first divided electrode 61. The number of second divided electrodes 62 arranged in the first direction D1 is not particularly limited, but may be, for example, three. The number of second divided electrodes 62 arranged in the second direction D2 is not particularly limited. The shape of the second divided electrodes 62 in plan view is a quadrilateral.

[0023] The electrode section 5 has a fuse section 7 interposed between two adjacent divided electrodes 6 among a plurality of divided electrodes 6. The fuse section 7 has a fuse 9. The fuse 9 is a part that melts when an excessive current flows, interrupting the circuit. Two adjacent divided electrodes 6 are connected via the fuse section 7. In other words, the fuse 9 in the fuse section 7 connects two adjacent divided electrodes 6. Note that two adjacent divided electrodes 6 include both two divided electrodes 6 adjacent in the first direction D1 and two divided electrodes 6 adjacent in the second direction D2. In this embodiment, the shape of the second divided electrode 62 in plan view is a quadrilateral. In this case, it is preferable that the fuse section 7 is arranged such that the fuse 9 extends from the side of the second divided electrode 62.

[0024] As already mentioned, the fuse section 7 includes a first fuse section 71 having a plurality of fuses 9. For example, a first divided electrode 61 and a second divided electrode 62 adjacent to the first divided electrode 61 in the first direction D1 are connected via the first fuse section 71 (see Figure 1). In other words, of the plurality of divided electrodes 6 arranged in the width direction, the divided electrode 6 closest to the first end 41 and the divided electrode 6 adjacent to the divided electrode 6 closest to the first end 41 are connected via the first fuse section 71. Also, two second divided electrodes 62 adjacent to each other in the first direction D1 are connected via the first fuse section 71. In short, the fuse section 7 includes a plurality of first fuse sections 71 arranged in the first direction D1 (width direction).

[0025] The fuse section 7 may further include a second fuse section 72 that is different from the first fuse section 71. The second fuse section 72 has one fuse 9. For example, among the second divided electrodes 62 adjacent in the second direction D2, the second divided electrode 62 that is positioned closest to the second end 42 is connected via the second fuse section 72 (see Figure 1). The line width of the fuse 9 in the second fuse section 72 is not particularly limited, but for example, from the viewpoint of suppressing a reduction in the effective area of ​​the electrode, it is preferable that the line width of the fuse 9 in the second fuse section 72 is thicker than the line width of the first fuse 91 in the first fuse section 71.

[0026] As already mentioned, the first fuse section 71 has a first fuse 91 with a narrower wire width than the other fuses 9 among the multiple fuses 9 (see Figure 1). In other words, the first fuse 91 is the fuse 9 with the narrowest wire width among the multiple fuses 9 that one first fuse section 71 has. Also, the multiple fuses 9 have a second fuse 92 with a wider wire width than the other fuses 9 (see Figure 1). In other words, the second fuse 92 is the fuse 9 with the widest wire width among the multiple fuses 9 that one first fuse section 71 has. For example, the first fuse section 71 has two fuses 9: the first fuse 91 and a fuse 9 different from the first fuse 91. In other words, in this embodiment, the multiple fuses 9 have the first fuse 91 and the second fuse 92.

[0027] Furthermore, among the multiple fuses 9 in the first fuse section 71, the wire width of the first fuse 91 is preferably 0.5 times or less the wire width of the second fuse 92, which has a thicker wire width than the other fuses 9. In this case, even if the first fuse 91 is blown, the path of the current flowing through the electrodes does not tend to become longer, and the effective area of ​​the electrodes of the metallized film 3 is less likely to decrease. The wire width of the first fuse 91 is more preferably 0.4 times or less the wire width of the second fuse 92, and even more preferably 0.2 times or less. The wire width of the first fuse 91 is preferably 0.4 times or more the wire width of the second fuse 92, in which case the safety of the film capacitor equipped with the metallized film 3 can be maintained. Here, the safety of the film capacitor means that dielectric breakdown of the film capacitor is suppressed. The wire widths of the first fuses 91 in each of the multiple first fuse sections 71 arranged in the width direction may be the same or may be different. The line widths of the second fuses 92 in each of the multiple first fuse sections 71 arranged in the width direction may be the same or different. The line widths of the fuses 9 in each of the adjacent fuse sections 7 in the second direction D2 may be the same or different. For example, in Figure 1, the line widths of the first fuses 91 in each of the multiple first fuse sections 71 arranged in the width direction are the same, the line widths of the second fuses 92 in each of the multiple first fuse sections 71 arranged in the width direction are the same, and the line widths of the fuses 9 in each of the adjacent fuse sections 7 in the second direction D2 are the same.

[0028] The spacing between the multiple fuses 9 in the first fuse section 71 is not particularly limited, but for example, the spacing between adjacent fuses 9 should be at least three times the wire width of the first fuse 91. In this case, the spacing between the multiple fuses 9 will not become excessively narrow. Therefore, it becomes easier to form multiple fuses 9.

[0029] 2.2 Modified Examples Modified examples of the metallized film 3 will be described with reference to the drawings. Note that the modified examples are examples of variations in which the configuration of the embodiment is partially changed, added, or deleted. Furthermore, with respect to the modified examples, components that are the same as those of the metallized film 3 described above will be denoted by the same reference numerals and their description will be omitted.

[0030] In the description of "2.1 Configuration" above, the metallized film 3 was provided with a dielectric film 4 and an electrode portion 5 as constituent elements, but it is not limited to this. For example, the metallized film 3 may further include constituent elements different from the dielectric film 4 and the electrode portion 5, in addition to the dielectric film 4 and the electrode portion 5. In that case, elements different from the dielectric film 4 and the electrode portion 5 may be arranged between the dielectric film 4 and the electrode portion 5.

[0031] In the description of "2.1 Configuration" above, two adjacent second divided electrodes 62 in the first direction D1 were connected via the first fuse portion 71, but this is not limited to this. For example, two adjacent second divided electrodes 62 in the first direction D1 may be connected via the second fuse portion 72 (see Figure 3). In this case, it is preferable that the first divided electrode 61 and the second divided electrode 62 adjacent to the first divided electrode 61 in the first direction D1 are connected via the first fuse portion 71. Even with such a metallized film 3, the effective area of ​​the electrodes is not easily reduced.

[0032] In the description of "2.1 Configuration" above, the line width of the first fuse 91 in each of the multiple first fuse sections 71 arranged in the width direction was the same, but this is not limited to this. For example, among the multiple first fuse sections 71 arranged in the first direction D1 (width direction), the line width of the first fuse 91 in the first fuse section 71 located further from the first end 41 may be thinner than the line width of the first fuse 91 in the first fuse section 71 located closer to the first end 41 (see Figure 4). In other words, the closer the first fuse section 71 is located to the second end 42, the thinner the line width of the first fuse 91 may be. This is thought to be because, since the first divided electrode 61 can be connected to a power supply, a relatively large current tends to flow near the first end 41, and as it approaches the second end 42 from the first end 41, the current flowing through the electrode tends to decrease. As a result, the fuse 9 in the fuse section 7 located away from the first end 41 is less likely to blow, and therefore the wire width of the first fuse 91 in the first fuse section 71 located away from the first end 41 can be made thinner. In this case, the effective area of ​​the electrodes of the metallized film 3 is less likely to decrease, and the safety of the film capacitor equipped with the metallized film 3 is enhanced.

[0033] In the description of "2.1 Configuration" above, the number of fuses 9 in the first fuse section 71 was two, but it is not limited to this. For example, the first fuse section 71 may have a third fuse 93 in addition to the first fuse 91 and the second fuse 92 (see Figure 5). The line width of the third fuse 93 is greater than or equal to the line width of the first fuse 91 and less than or equal to the line width of the second fuse 92. In this way, when the first fuse section 71 has a third fuse 93 in addition to the first fuse 91 and the second fuse 92, when an excessive current flows through the film capacitor equipped with the metallized film 3, the fuses may blow in order of increasing line width, that is, the first fuse 91, the third fuse 93, and the second fuse 92. In this way, the three fuses 9 may blow in stages, so the effective area of ​​the electrodes of the metallized film 3 is less likely to decrease further, and the safety of the film capacitor equipped with the metallized film 3 is further enhanced.

[0034] Furthermore, in the description of "2.1 Configuration" above, adjacent divided electrodes 6 in the first direction D1 were connected via the first fuse section 71, but this is not limited to this. For example, the number of fuses 9 in the first fuse section 71 may decrease as you approach the second end 42 from the first end 41 (see Figure 6). To give a specific example, in the description of "2.1 Configuration" above, the first divided electrode 61 and the three second divided electrodes 62 were arranged in the first direction D1 in order of proximity to the first end 41. In this case, the second divided electrode 62 closest to the second end 42 and the second divided electrode 62 adjacent to the second divided electrode 62 closest to the second end 42 in the first direction D1 may be connected via the second fuse section 72. Furthermore, the second divided electrode 62 closest to the second end 42 and the second divided electrode 62 adjacent to it in the first direction D1, and the second divided electrode 62 adjacent to the first divided electrode 61 in the first direction D1, may be connected via a first fuse section 71 having only a first fuse 91 and a second fuse 92. The first divided electrode 61 and the second divided electrode 62 adjacent to the first divided electrode 61 in the first direction D1 may be connected via a first fuse section 71 having a first fuse 91, a second fuse 92, and a third fuse 93. This is because, since the first divided electrode 61 can be connected to a power source, a relatively large current tends to flow near the first end 41, and the current flowing through the electrode tends to decrease as it approaches the second end 42 from the first end 41. According to this, the fuses 9 in the fuse section 7 located away from the first end 41 are less likely to blow, and therefore the number of fuses 9 in the fuse section 7 located away from the first end 41 can be reduced. In this way, even if the number of fuses 9 in the first fuse section 71 is reduced as it approaches the second end 42 from the first end 41, the safety of the film capacitor equipped with the metallized film 3 is not impaired, and the capacitance of the film capacitor can be maintained.

[0035] 2.3 Application Examples The metallized film 3 having the above configuration can be suitably used to manufacture film capacitors. When an excessive current flows through a film capacitor manufactured from the metallized film 3, the first fuse 91 among the multiple fuses 9 in the metallized film 3 melts, thereby preventing dielectric breakdown of the film capacitor. On the other hand, among the multiple fuses 9, the other fuses 9, which are different from the first fuse 91, tend to remain unmelted. Therefore, adjacent divided electrodes 6 connected to the first fuse section 71 are less likely to be electrically disconnected. This makes it less likely for the current path through the electrodes to become long, and as a result, the equivalent series resistance (ESR) of the film capacitor does not tend to increase. Furthermore, since adjacent divided electrodes 6 connected to the first fuse section 71 are less likely to be electrically disconnected, the effective area of ​​the electrodes of the metallized film 3 does not tend to decrease, and therefore the capacitance of the film capacitor does not tend to decrease.

[0036] The configuration of the film capacitor according to the embodiment will now be described. The film capacitor comprises the metallized film 3 described above. For example, the film capacitor comprises a capacitor body. The capacitor body includes the metallized film 3. For example, in the case of a wound-type film capacitor, the capacitor body includes the metallized film 3 that is wound in layers. In the case of a multilayer-type film capacitor, the capacitor body includes the metallized film 3 that is alternately layered. In addition to the capacitor body, the film capacitor may also include end electrodes. The end electrodes are arranged on each of the two sides of the film capacitor. That is, the film capacitor according to the embodiment comprises two end electrodes. The material of the end electrodes is not particularly limited, but examples include zinc (Zn), tin (Sn), or alloys thereof. The thickness of the end electrodes is not particularly limited, but for example, it is 0.5 mm or more and 1.5 mm or less. Of the two metallized films 3 that overlap in the third direction D3, the electrode portion 5 of the upper metallized film 3 is connected to one of the end face electrodes of the film capacitor, and the electrode portion 5 of the lower metallized film 3 is connected to the other end face electrode of the film capacitor.

[0037] Furthermore, while film capacitors having the above configuration can be applied to various uses, they are particularly suitable for manufacturing inverters. Inverters manufactured from film capacitors having the above configuration can exhibit high reliability. Here, reliability means that even if excessive heat is generated due to the flow of excessive current, the capacitor has high thermal resistance, and as a result, the output of the inverter is maintained.

[0038] The specific configuration of the inverter according to the embodiment will now be described. The inverter includes a film capacitor having the configuration described above. For example, in addition to the film capacitor, the inverter may include a converter circuit and an inverter circuit. The converter circuit is a circuit that converts alternating current to direct current and is electrically connected to the film capacitor. The inverter circuit is a circuit that converts the voltage and frequency of the alternating current when converting direct current to alternating current and is electrically connected to the film capacitor. The inverter can be used in connection with external equipment such as a power supply and a motor. For example, the converter circuit of the inverter may be connected to a power supply and the inverter circuit of the inverter may be connected to a motor. In this case, the alternating current from the power supply is converted to direct current by the converter circuit, and the converted direct current is stabilized by the film capacitor through repeated charging and discharging. This direct current is then converted to alternating current at an arbitrary voltage and frequency by the inverter circuit and output.

[0039] An inverter with the above configuration can be applied to various uses, but it is particularly suitable for manufacturing vehicles. Specifically, an electric vehicle that runs on an AC motor as its power source can be found. The number of inverters in a vehicle is not particularly limited, but for example, one to two inverters per vehicle is typical.

[0040] The specific configuration of the vehicle according to the embodiment will now be described. The vehicle is equipped with an inverter having the configuration described above. For example, in addition to the inverter, the vehicle is equipped with an AC motor, a transmission, a battery, an electronic control unit, wheels, and axles. The wheels include front wheels and rear wheels. The axles include a front axle and a rear axle. For example, the vehicle employs a front-engine, front-wheel-drive (FF) system. In this case, an AC motor as a drive source and a transmission are arranged at the front of the vehicle. The transmission has the function of changing the rotation of the AC motor and transmitting it to the front axle. The front axle is arranged horizontally in the vehicle width direction. The front wheels, which are drive wheels, are attached to the left and right ends of the front axle. At the rear of the vehicle, the rear axle is arranged parallel to the front axle along the vehicle width direction. The rear wheels are attached to the left and right ends of the rear axle. The battery is a DC power source. DC power supplied from the battery is converted to AC power by an inverter and supplied to an AC motor, which then rotates. The output of the AC motor is controlled via an inverter that operates according to a control signal output from an electronic control unit. The inverter according to this embodiment includes a film capacitor with a metallized film 3, in which case the inverter's function of converting DC power supplied from the battery to AC power is easily maintained. Therefore, deterioration of the vehicle's performance is suppressed.

[0041] 3. Aspects As will be clear from the above embodiments, this disclosure includes the following aspects. Hereafter, reference numerals are enclosed in parentheses solely to indicate their correspondence with the embodiments.

[0042] A metallized film (3) according to a first aspect of the present disclosure comprises a dielectric film (4) and an electrode portion (5) disposed on a first surface (81) of the dielectric film (4). The electrode portion (5) has a plurality of segmented electrodes (6) and a fuse portion (7) interposed between two adjacent segmented electrodes (6) among the plurality of segmented electrodes (6). The two adjacent segmented electrodes (6) are connected via the fuse portion (7). The fuse portion (7) includes a first fuse portion (71) having a plurality of fuses (9). The first fuse portion (71) has a first fuse (91) among the plurality of fuses (9) that has a narrower line width than the other fuses (9).

[0043] According to this aspect, it is possible to provide a metallized film (3) in which the path of the current flowing through the electrodes is unlikely to become long and the effective area of the electrodes is unlikely to decrease.

[0044] In the metallized film (3) according to the second aspect of the present disclosure, in the first aspect, among the plurality of fuses (9) included in the first fuse portion (71), the line width of the first fuse (91) is 0.5 times or less the line width of the second fuse (92) that is wider than the other fuses (9).

[0045] The metallized film (3) according to the third aspect of the present disclosure, in the first or second aspect, the dielectric film (4) has a first end portion (41) and a second end portion (42) on the side opposite to the first end portion (41) in the width direction. The first surface (81) has a margin portion (43) on the second end portion (42) side where the electrode portion (5) is not disposed. The electrode portion (5) has a plurality of divided electrodes (6) arranged in the width direction. Among the plurality of divided electrodes (6) arranged in the width direction, the divided electrode (6) closest to the first end portion (41) and the divided electrode (6) adjacent to the divided electrode (6) closest to the first end portion (41) are connected via the first fuse portion (71).

[0046] The metallized film (3) according to the fourth aspect of the present disclosure, in any one of the first to third aspects, the fuse portion (7) includes a plurality of first fuse portions (71) arranged in the width direction. Among the plurality of first fuse portions (71) arranged in the width direction, in two first fuse portions (71), the line width of the first fuse (91) included in the first fuse portion (71) located farther from the first end portion (41) is thinner than the line width of the first fuse (91) included in the first fuse portion (71) located closer to the first end portion (41).

[0047] The metallized film (3) according to the fifth aspect of the present disclosure, in any one of the first to fourth aspects, the fuse portion (7) further includes a second fuse portion (72) having one fuse (9).

[0048] The film capacitor according to the sixth aspect of the present disclosure includes the metallized film (3) according to any one of the first to fifth aspects.

[0049] An inverter according to a seventh aspect of this disclosure comprises a film capacitor according to a sixth aspect.

[0050] A vehicle according to the eighth aspect of this disclosure is equipped with an inverter according to the seventh aspect.

[0051] 3 Metallized film 4 Dielectric film 41 First end 42 Second end 43 Margin 5 Electrode 6 Divided electrode 7 Fuse 71 First fuse 72 Second fuse 81 First surface 9 Fuse 91 First fuse 92 Second fuse

Claims

The device comprises a dielectric film and an electrode portion disposed on the first surface of the dielectric film, The electrode portion comprises a plurality of divided electrodes and a fuse portion interposed between two adjacent divided electrodes among the plurality of divided electrodes. The two adjacent divided electrodes are connected via the fuse section. The fuse section includes a first fuse section having a plurality of fuses, The first fuse section includes a first fuse among the plurality of fuses, the first fuse having a narrower wire width than the other fuses. Metallized film. 　 Of the plurality of fuses in the first fuse section, the wire width of the first fuse is 0.5 times or less the wire width of the second fuse, which has a thicker wire width than the other fuses. The metallized film according to claim 1. 　 The dielectric film has a first end in the width direction and a second end opposite to the first end, The first surface has a margin portion on the second end side where the electrode portion is not arranged. The electrode portion has the plurality of divided electrodes arranged in the width direction, Of the plurality of divided electrodes arranged in the width direction, the divided electrode closest to the first end and the divided electrode adjacent to the divided electrode closest to the first end are connected via the first fuse portion. The metallized film according to claim 1. 　 The fuse section includes a plurality of first fuse sections arranged in the width direction, In a plurality of first fuse portions arranged in the width direction, in two of the first fuse portions, the wire width of the first fuse in the first fuse portion located further from the first end is narrower than the wire width of the first fuse in the first fuse portion located closer to the first end. The metallized film according to claim 3. 　 The fuse section further includes a second fuse section having one fuse. The metallized film according to claim 1. 　 The metallized film according to claim 1, Film capacitor. 　 A film capacitor as described in claim 6, Inverter. 　 The inverter is provided as described in claim 7. vehicle.

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