Double-side-plated multi-step metal film, capacitor element and capacitor

Abstract

The utility model discloses a double-side-plated multi-step metal film, a capacitor element and a capacitor, and relates to the technical field of capacitors, the double-side-plated multi-step metal film comprises a dielectric film, two opposite sides of the dielectric film are respectively a first side surface and a second side surface; and the metal coating layers are symmetrically arranged at the top and the bottom of the dielectric film, one side of each metal coating layer is flush with the first side surface, the other side of each metal coating layer is flush with the second side surface, and the thickness of each metal coating layer is gradually reduced in a step shape along the direction from the first side surface to the second side surface. The double-side-plated multi-step metal film can reduce the temperature rise of the capacitor and prolong the service life of the capacitor.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film capacitor technical field, especially in two face plating multistage ladder metal film, capacitor element and capacitor. BACKGROUND

[0002] Thin film capacitor is the indispensable basic element of electronic complete machine and electrical equipment, power equipment, is widely used in electronic equipment, computer equipment, communication equipment, new energy, household appliance and military product etc. Thin film capacitor includes shell and capacitor element arranged in the shell, and the capacitor element generates heat when working.

[0003] The utility model discloses a multistage ladder type resistance thin film capacitor element and capacitor, and the utility model discloses a capacitor element for two metalized film winding structures, and the ESR of capacitor plate plating layer is relatively high and the reduction space is limited, and the "J" area in two film structures is formed by shielding oil, and the shielding oil evaporation process can pollute the metal plating layer to further increase the ESR, and the capacitor has high temperature rise in normal work, and works under high temperature load for a long time, and the capacitor service life will be reduced. SUMMARY

[0004] The utility model discloses a main purpose is provided with two face plating multistage ladder metal film, aims at providing a kind of two face plating multistage ladder metal film that can reduce the capacitor temperature rise and promote capacitor service life.

[0005] To achieve the above-mentioned purpose, the two face plating multistage ladder metal film provided by the utility model comprises:

[0006] The medium film has a first side and a second side on its opposite sides.

[0007] The metal plating layer is symmetrically arranged on the top and bottom of the medium film. One side of the metal plating layer is flush with the first side, and the other side of the metal plating layer is flush with the second side. The thickness of the metal plating layer gradually decreases in a stepwise manner from the first side to the second side.

[0008] Optionally, the metal plating layer forms at least two steps.

[0009] Optionally, the metal plating layer is an aluminum plating layer or a zinc-aluminum alloy plating layer.

[0010] Optionally, the transition between adjacent steps is achieved through a slope.

[0011] The utility model discloses still propose a kind of capacitor element, the capacitor element is alternately placed and overlaps and is wound by two layers of double-sided multi-ladder metal film as described above and two layers of base film, two layers of the double-sided multi-ladder metal film is placed with opposite direction staggered edge, the opposite side of two layers of the base film is flush, the first side protrudes from the side of the base film and forms staggered edge X, the other side of the base film protrudes from the second side and forms insulation distance J.

[0012] The utility model discloses still propose a kind of capacitor, the capacitor includes:

[0013] Shell;

[0014] The capacitor element as described above is arranged inside the shell, and further includes the double-sided multi-ladder metal film as described above.

[0015] The utility model technical scheme includes medium film and metal plating, metal plating is symmetrically arranged at the top and bottom of medium film, metal plating is arranged in ladder shape, and the left and right sides of metal plating are flush with the left and right sides of medium film. Since the left and right sides of metal plating are flush with the left and right sides of medium film on the top and bottom of medium film, the technical problem of high temperature rise and short service life of capacitor caused by single-sided metal plating and blank margin formed by shielding oil in the prior art is effectively solved, and the technical effect of reducing capacitor temperature rise and improving capacitor service life is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic drawing of the first embodiment of the utility model double-sided multi-ladder metal film;

[0017] Figure 2 It is the structure schematic drawing of the second embodiment of the utility model double-sided multi-ladder metal film;

[0018] Figure 3 It is the structure schematic drawing of the third embodiment of the utility model double-sided multi-ladder metal film;

[0019] Figure 4 It is the structure schematic drawing of the fourth embodiment of the utility model double-sided multi-ladder metal film;

[0020] Figure 5 It is the structure schematic drawing of the fifth embodiment of the utility model double-sided multi-ladder metal film;

[0021] Figure 6 It is the structure schematic drawing of the first embodiment of the utility model capacitor element using double-sided multi-ladder metal film;

[0022] Figure 7The structure schematic diagram of the capacitor element adopting the double-sided plated multi-step metal film second embodiment of the utility model is shown in the figure.

[0023] Figure 8 The structure schematic diagram of the capacitor element adopting the double-sided plated multi-step metal film third embodiment of the utility model is shown in the figure.

[0024] Figure 9 The structure schematic diagram of the capacitor element adopting the double-sided plated multi-step metal film fourth embodiment of the utility model is shown in the figure.

[0025] Figure 10 The structure schematic diagram of the capacitor element adopting the double-sided plated multi-step metal film fifth embodiment of the utility model is shown in the figure.

[0026] Explanation of the reference signs:

[0027] The double-sided plated multi-step metal film 100, the dielectric film 10, the metal plating layer 20, the gold spraying area 21 and the base film 200. Specific implementation

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0030] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0032] The utility model provides a double -sided plating multistage metal film 100.

[0033] In order to better understand the above technical scheme, the above technical scheme will be described in detail in the following description of the drawings and specific embodiments.

[0034] In the embodiment of the utility model, as shown in Figures 1 to 5 The double -sided plating multistage metal film 100 includes dielectric film 10 and metal plating 20, wherein the opposite sides of dielectric film 10 are first side and second side respectively;Metal plating 20 is symmetrically arranged at the top and bottom of dielectric film 10, one side of metal plating 20 is flush with the first side, the other side of metal plating 20 is flush with the second side, and along the direction from the first side to the second side, the thickness of metal plating 20 gradually decreases in a stepped manner.

[0035] Understandably, the two sides of metal plating 20 are flush with the two sides of dielectric film 10, that is, the width of metal plating 20 is equal to the width of dielectric film 10, metal plating 20 completely covers the upper surface or lower surface of dielectric film 10, the plating square resistance and the plating thickness are inversely proportional, the thickness of metal plating 20 gradually decreases in a stepped manner, then the plating square resistance gradually increases from the first step to the Nth step, that is, the thickness of the first step is the thickest and the square resistance is the lowest, the thickness of the Nth step is the thinnest and the square resistance is the highest, the position of the first step is the gold spraying area 21, the gold spraying area 21 is used for spraying gold after winding capacitor element to form a gold spraying layer, which can reduce the contact resistance.

[0036] The utility model discloses technical scheme includes medium film 10 and metal plating 20, metal plating 20 symmetry is established at the top and bottom of medium film 10, metal plating 20 is arranged in the form of ladder, and the both sides of metal plating 20 are flush with the both sides of medium film 10 respectively.

[0037] In the embodiment of the utility model, metal plating 20 forms at least two steps. Figure 1 As shown in the first embodiment, the metal plating 20 of double-sided plating multi-step metal film 100 forms first step and second step, as shown in the second embodiment, Figure 2 The metal plating 20 of double-sided plating multi-step metal film 100 forms first step, second step and third step, as shown in the third embodiment, Figure 3 The metal plating 20 of double-sided plating multi-step metal film 100 forms first step, second step, third step and fourth step, as shown in the fourth embodiment, Figure 4 The metal plating 20 of double-sided plating multi-step metal film 100 forms first step, second step, third step, fourth step and fifth step, as shown in the fifth embodiment, Figure 5 The metal plating 20 of double-sided plating multi-step metal film 100 forms first step, second step, third step, fourth step, fifth step and sixth step, and the difference of different embodiments is only the difference of step number, and the effect of reducing capacitor temperature rise can be achieved, wherein the first step of the thickest plating thickness is the position of the gold spraying area 21.

[0038] In the embodiment of the utility model, metal plating 20 is aluminum plating or zinc-aluminum alloy plating.

[0039] In the embodiment of the utility model, the transition between adjacent steps is realized through inclined plane.

[0040] The utility model also proposes a capacitor element, as shown in the formula (I), Figures 6 to 10As shown, the capacitor element is formed by alternately placing two layers of the double-sided multi-step metal film 100 and two layers of the base film 200 with the edges staggered and overlapping and winding, the specific structure of the double-sided multi-step metal film 100 refers to the above-mentioned embodiments, since the capacitor element adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the two layers of double-sided multi-step metal film 100 are placed with the edges staggered in opposite directions, the opposite two sides of the two layers of base film 200 are flush, the first side protrudes from one side of the base film 200 and forms a staggered edge X, and the other side of the base film 200 protrudes from the second side and forms an insulation distance J.

[0041] As shown in the figure, Figure 6 , the capacitor element adopts the double-sided multi-step metal film 100 of the third embodiment, four layers of film are placed in the order of double-sided multi-step metal film 100-base film 200-double-sided multi-step metal film 100-base film 200, wherein the two layers of double-sided multi-step metal film 100 are placed with the edges staggered in opposite directions, the opposite two sides of the two layers of base film 200 are flush, the double-sided multi-step metal film 100 is staggered with the base film 200, one side forms a staggered edge X, and the other side forms an insulation distance J, which is the insulation distance of the positive and negative electrode plates of the capacitor. The utility model adopts two double-sided multi-step metal films 100, so that the two sides of the base film 200 have metal layers, which is equivalent to that the thickness of the positive and negative electrode plate metal plating layer 20 is 2 times that of the traditional two-layer film structure. The ESR of the electrode plate plating layer of the present application can be reduced to 0.5 times that of the traditional two-layer film structure, and there is no blank area on both sides, and the evaporation process does not need to be shielded with oil, which can prevent pollution caused by the shielding oil evaporation process of the traditional two-layer film structure, and further reduce the ESR. Since the temperature rise △T of the capacitor satisfies △T=I 2 *ESR*R th , the ESR is reduced by 0.5 times, and the current can be increased by 1.4 times. Figures 7 to 10 The capacitor element shown in the figure is different from Figure 6 only in that the number of steps of the double-sided multi-step metal film 100 used is different, and the placement order, staggered manner and winding manner are the same, which will not be repeated here.

[0042] The utility model also provides a capacitor, the capacitor includes a shell and a capacitor, and the capacitor is arranged in the shell, further includes the double-sided multi-step metal film 100 as described above. The specific structure of the double-sided multi-step metal film 100 refers to the above-mentioned embodiments, since the capacitor adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The utility model provides a capacitor with double-sided multi-step metal film 100, which increases the thickness of the electrode plate plating layer through the metal film structure, avoids pollution caused by shielding oil, and reduces the ESR of the electrode plate plating layer.

[0043] The above is only optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by the present application specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A dual-sided plated multi-staircase metal film, characterized by, The double-sided multi-step metal film comprises: a dielectric film, the opposite sides of the dielectric film being a first side and a second side respectively; a metal plating layer symmetrically arranged on the top and bottom of the dielectric film, one side of the metal plating layer being flush with the first side, the other side of the metal plating layer being flush with the second side, and the thickness of the metal plating layer gradually decreasing in a direction from the first side to the second side.

2. The dual-sided plated multi-staircase metal film of claim 1, wherein, The metal plating layer forms at least two steps.

3. The dual-sided multi-tier metal film of claim 1, wherein, The metal plating layer is an aluminum plating layer or a zinc-aluminum alloy plating layer.

4. The dual-sided multi-tier metal film of claim 1, wherein, The transition between adjacent steps is achieved by a slope.

5. A capacitor element, characterized by The capacitor element is formed by alternately placing two layers of the double-sided multi-step metal film of any one of claims 1 to 4 and two layers of base film, with the two layers of the double-sided multi-step metal film being placed with the edges staggered in opposite directions, the opposite sides of the two layers of base film being flush, the first side protruding from one side of the base film and forming a staggered edge X, and the other side of the base film protruding from the second side and forming an insulation distance J.

6. A capacitor, comprising: a housing; the capacitor element of claim 5, the capacitor element being arranged inside the housing, and further comprising the double-sided multi-step metal film of any one of claims 1 to 4.

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