CN217182030U

CN217182030U - Metallized high-voltage explosion-proof film capacitor

Info

Publication number: CN217182030U
Application number: CN202220134567.8U
Authority: CN
Inventors: 何文钜
Original assignee: Guangdong Fengming Electronic Tech Co ltd
Current assignee: Guangdong Fengming Electronic Tech Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-08-12
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses a metallized high pressure explosion-proof film capacitor, first cladding material thickened area and the first blank limit of first layer metallized film between be equipped with first conductive region, be equipped with first blank median between first cladding material thickened area and the first conductive region, first conductive region is cut apart through first blank median and is formed latticed structure, second cladding material thickened area and the second of second layer metallized film are left and are equipped with the second conductive region between the blank limit, be equipped with the blank median of second between second cladding material thickened area and the second conductive region, the second conductive region is cut apart through the blank median of second and is formed with second unit district, make this capacitor (450 V.AC rated voltage) also can play explosion-proof effect under 1.3 times rated (585 V.AC) alternating voltage stack 10 times (4500 V.DC) rated direct current voltage condition for last 5 minutes. The utility model discloses a material cost of non-interior string formula metallization high pressure explosion-proof film capacitor is low, the easy manufacturing, and the product percent of pass is high, and economic benefits and social are good.

Description

Metallized high-voltage explosion-proof film capacitor

Technical Field

The utility model particularly relates to a metallized film capacitor field, in particular to metallized high-pressure explosion-proof film capacitor.

Background

The polypropylene film explosion-proof capacitor (S3 grade) of the AC motor with 450V rated voltage in the market at present adopts a layer of metallized safety film and a layer of common film or two layers of metallized safety films to be overlapped and wound to form the capacitor. The capacitor has two structures of an inner series type and a non-inner series type, although a few products of the inner series type capacitor can pass the test of ' 1.3 times rated (585 V.AC) alternating voltage is superposed with 10 times rated direct voltage (4500 V.DC) ' and the capacitor can not explode for 5 minutes ', the inner series type explosion-proof capacitor has large manufacturing difficulty, higher material cost and low qualified rate of capacitor finished products due to the thinner film used, and cannot be widely applied; compared with the internal series capacitor, the non-internal series capacitor has the advantages of relatively low cost and convenient manufacture, but the non-internal series capacitor on the market cannot pass the test of the above conditions.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned prior art not enough, provide an explosion-proof film capacitor of metallization high pressure, its explosion-proof performance is good, and the cost of manufacture is lower relatively, be convenient for make, and can satisfy among the GB/T3667.1 explosion-proof residual capacity of S3 < 1% requirement, can last 5 minutes and play the blast proof effect under 1.3 times rated (585 V.AC) alternating voltage stack 10 times (4500 V.DC) rated direct voltage condition simultaneously.

The utility model discloses a metallized high-voltage explosion-proof film capacitor, which comprises a shell, a capacitor element and a leading-out end, wherein the capacitor element is positioned in the shell, the leading-out end is positioned at one end of the shell, and the capacitor element is formed by two layers of metallized films through lap winding; the edge of one side of the first layer of metallized film is provided with a first blank edge, the edge of the other side corresponding to the first layer of metallized film is provided with a first plating thickening area, a first conductive area is arranged between the first plating thickening area and the first blank edge, a first blank isolation belt is arranged between the first plating thickening area and the first conductive area, the first blank isolation belt is provided with at least one first fuse used for connecting the first plating thickening area and the first conductive area, the first conductive area is divided by a first blank dividing belt to form a grid structure, and adjacent first unit areas of the first conductive area are connected by at least one second fuse; one side edge of the second layer of metallized film is provided with a second reserved blank edge, the other side edge corresponding to the second layer of metallized film is provided with a second plating thickening area, the second plating thickening area and a second conductive area are arranged between the second reserved blank edges, a second blank isolation belt is arranged between the second plating thickening area and the second conductive area, the second blank isolation belt is provided with at least one third fuse used for connecting the second plating thickening area and the second conductive area, the second conductive area is divided by the second blank division belt to form a second unit area, and the second unit area is adjacent to the second unit area and is connected through at least one fourth fuse.

Preferably, the second conductive region is divided by the second blank dividing strip to form a grid-like structure.

Preferably, the second conductive region is divided by the second blank dividing strip to form a T-shaped structure.

Preferably, the thicknesses of the first layer of metallized film and the second layer of metallized film are set to be 6.9 micrometers to 7.8 micrometers, the widths of the first margin edge and the second margin edge are set to be 1.5 millimeters to 3.2 millimeters, the widths of the first blank isolation strip and the second blank isolation strip are set to be 1.5 millimeters to 2 millimeters, the sheet resistances of the first conductive region and the second conductive region are set to be 8 Ω/□ to 15 Ω/□, the widths of the first fuse and the third fuse are set to be 0.23 millimeters to 0.32 millimeters, and the sheet resistances of the first fuse and the third fuse are set to be 4 Ω/□ to 7 Ω/□.

The utility model has the advantages that: a first conductive area is arranged between the first coating thickened area and the first margin edge, a first margin isolation belt is arranged between the first coating thickened area and the first conductive area, the first margin isolation belt is provided with at least one first fuse used for connecting the first coating thickened area and the first conductive area, the first conductive area is divided by the first margin dividing belt to form a latticed structure, and adjacent first unit areas of the first conductive area are connected by at least one second fuse; second cladding material thickened area and second are stayed and are equipped with the second conduction region between the blank limit, are equipped with the blank median of second between second cladding material thickened area and the second conduction region, and the blank median of second is equipped with at least one and is used for the third fuse of being connected second cladding material thickened area and second conduction region, and the second conduction region is cut apart through the blank median of second and is formed with the second unit district, and adjacent second unit district is connected through an at least fourth fuse, improves effectively the utility model discloses a compressive capacity of electric capacity plain improves greatly the utility model discloses an explosion-proof reliability of S3 of condenser, the utility model discloses a manufacturing cost of condenser is lower relatively, is convenient for make.

Drawings

Fig. 1 is a schematic structural view of a first layer of metallized film according to the present invention.

Fig. 2 is a schematic structural view of the second layer metallized film of the present invention.

Fig. 3 is an enlarged schematic view at a of fig. 1.

Fig. 4 is a schematic cross-sectional view of a first layer of metallized film according to the present invention.

Fig. 5 is a schematic view of a cross-sectional structure of a first layer of metallized film and a second layer of metallized film roll.

The reference numbers illustrate: 100-a first layer of metallized film; 2-a first plating thickening region; 3-a first fuse; 4-a first conductive region; 401 — a first cell region; 5-a second fuse; 6-a first blank isolation zone; 7-a first blank dividing zone, 8-a first margin; 200-a second layer of metallized film; 21-second plating thickening region; 31-a third fuse; 41-a second conductive region; 4101-a second cell region; 51-a fourth fuse; 61-a second blank isolation zone; 71-second blank dividing zone, 81-second margin; 9-metal spraying part.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The utility model discloses an explosion-proof film capacitor of metallization high pressure, constitute including shell, capacitor element and drawing-out end, capacitor element is located the shell, draws-out end and is located shell one end, and capacitor element is formed for two-layer metallized film lap, and the metallized film has plated a film of metal level on insulating plastic film.

As shown in fig. 1, a first margin 8 is provided at one side edge of the first layer of metallized film 100, that is, there is no metal plating on the first margin 8, a first plating thickening region 2 is provided at the other side edge of the first layer of metallized film 100, a first conductive region 4 is provided between the first plating thickening region 2 and the first margin 8, that is, the thickness of the metal plating of the first plating thickening region 2 is greater than that of the first conductive region 4, a first blank isolation strip 6 is provided between the first plating thickening region 2 and the first conductive region 4, the first blank isolation strip 6 is provided with at least one first fuse 3 for connecting the first plating thickening region 2 and the first conductive region 4, the first conductive region 4 is divided by a first blank dividing strip 7 to form a grid structure, adjacent first unit regions 401 of the first conductive region 4 are connected by at least one second fuse 5, specifically, the first unit area 401 is a lattice area divided by the first blank dividing tape 7 on the first conductive area 4.

As shown in fig. 2, one side edge of the second layer of metallized film 200 is provided with a second margin 81, the other side edge of the second layer of metallized film 200 corresponding to the second layer of metallized film is provided with a second plating layer thickened region 21, a second conductive region 41 is provided between the second plating layer thickened region 21 and the second margin 81, a second margin isolation belt 61 is provided between the second plating layer thickened region 21 and the second conductive region 41, the second margin isolation belt 61 is provided with at least one third fuse 31 for connecting the second plating layer thickened region 21 and the second conductive region 41, the second conductive region 41 is divided by a second margin dividing belt 71 to form a second unit region 4101, and adjacent second unit regions 1 are connected by at least one fourth fuse 51 4104101.

The first layer of metallized film 100 and the second layer of metallized film 200 are stacked and rolled to form the capacitor element.

By arranging the second fuse 5 and the fourth fuse 51, when the partial range of the rolled second conductive region 41 or the first conductive region 4 is punctured, the second fuse 5 or the fourth fuse 51 corresponding to the punctured range can be rapidly fused, so that the punctured first unit region 401 or second unit region 4101 is disconnected from the corresponding surrounding first unit region 401 or second unit region 4101 which is not punctured, the self-healing range is prevented from being continuously expanded, and the capacitor is prevented from being exploded. When the first fuse 3 is blown out due to overload, since the first blank isolation strip 6 is disposed near the edge of the first layer of metallized film 100, the diffusion of the breakdown region to the first conductive region 4 can be blocked, so as to avoid the explosion of the capacitor caused by the evaporation of a large amount of the material of the first conductive region 4, and the function of the third fuse 31 is the same as that of the first fuse 3. As shown in fig. 5, the metal spraying portion 9 is connected to the first plating thickening region 2 and the second plating thickening region 21, the first plating thickening region 2 corresponds to the second margin 81, and the first plating thickening region 2 and the second plating thickening region 21 are disposed to ensure the connection conductivity between the capacitor element and the metal spraying portion 9.

In some embodiments, the second conductive region 41 is divided by the second blank dividing strip 71 to form a grid structure, that is, the second conductive region 41 of the second layer of the metalized film 200 may also be configured to have the same structure as the first conductive region 4, so as to be beneficial to preventing the self-healing range from being expanded.

As shown in fig. 2, in some embodiments, the second conductive region 41 is divided by the second dividing blank 71 to form a T-shaped structure, the T-shaped structure of the second conductive region 41 is prior art, and particularly, the second dividing blank 71 and the second margin 81 form a T-shaped margin, the second conductive region 41 having the T-shaped structure is manufactured at a low cost, and the capacitance of the capacitor can be easily ensured. Accordingly, by providing the second conductive area 41 having the T-shaped structure in combination with the first conductive area 4 having the mesh-like structure, it is advantageous to secure the capacitance of the capacitor and also to secure the explosion-proof performance of the capacitor.

Further, as shown in fig. 4, the thickness of the first and second metalized films 100 and 200 (i.e., the dimension "D" in fig. 4) is set to 6.9 to 7.8 μm, as shown in fig. 1, the width of the first and second margin portions 8 and 81 (i.e., the dimension "W1" in fig. 1) is set to 1.5 to 3.2 mm, as shown in fig. 3, the width of the first and second margin portions 6 and 61 (i.e., the dimension "W2" in fig. 3) is set to 1.5 to 2 mm, the sheet resistance of the first and second

conductive regions

4 and 41 is set to 8 Ω/□ to 15 Ω/□, the width of the first and third fuses 3 and 31 (i.e., the dimension "W3" in fig. 3) is set to 0.23 to 0.32 mm, the sheet resistance of the first and

third fuses

3 and 31 is set to 4 Ω/□ to 7 Ω/□, and the capacitor is set according to the parameters of the present invention, the explosion-proof test was carried out, and the test results are shown in the following table (vertical expression):

the tests in the table show that the arrangement of the first blank isolation belt 6, the second blank isolation belt 61, the first blank dividing belt 7, the second blank dividing belt 71, the first blank edge 8 and the second blank edge 81 effectively improves the pressure resistance of the capacitor element, greatly improves the reliability of explosion resistance of the S3 of the capacitor, and can play an explosion-proof role even if the voltage lasts for 5 minutes under the condition that 1.3 times of rated (585 V.AC) alternating voltage is superposed with 10 times of rated (4500 V.DC) direct current voltage. The utility model discloses an explosion-proof film capacitor of metallization high pressure is a condenser not only reliable but also safe, moreover, compares with present interior cluster structure condenser product, the utility model discloses a material cost of cluster formula metallization high pressure explosion-proof film capacitor in the non is low, the easy manufacturing, and the product percent of pass is high, and economic benefits and social are good.

Claims

1. A metallized high-voltage explosion-proof film capacitor comprises a shell, a capacitor element and a leading-out end, wherein the capacitor element is positioned in the shell, the leading-out end is positioned at one end of the shell, and the capacitor element is formed by two layers of metallized films in a lap-winding mode;

the method is characterized in that: a first margin edge (8) is arranged at the edge of one side of the first layer of metallized film (100), a first plating layer thickening area (2) is arranged at the edge of the other side corresponding to the first layer of metallized film (100), a first conductive area (4) is arranged between the first plating layer thickened area (2) and the first margin (8), a first blank isolation belt (6) is arranged between the first plating layer thickening area (2) and the first conductive area (4), the first blank isolation belt (6) is provided with at least one first fuse (3) for connecting the first plating thickening area (2) with the first conductive area (4), the first conductive area (4) is divided by a first blank dividing strip (7) to form a grid-shaped structure, adjacent first cell areas (401) of the first conductive area (4) are connected by at least one second fuse (5);

a second margin (81) is arranged at one side edge of a second layer of metallized film (200), a second plating layer thickened area (21) is arranged at the other side edge corresponding to the second layer of metallized film (200), a second conductive area (41) is arranged between the second plating layer thickened area (21) and the second margin (81), a second blank isolation belt (61) is arranged between the second plating layer thickened area (21) and the second conductive area (41), at least one third fuse (31) for connecting the second plating layer thickened area (21) and the second conductive area (41) is arranged on the second blank isolation belt (61), the second conductive area (41) is divided by a second blank dividing belt (71) to form a second unit area (4101), and the adjacent second unit areas (4101) are connected by at least one fourth fuse (51).

2. The metallized high voltage rupture membrane capacitor as defined in claim 1 wherein: the second conductive area (41) is divided by a second blank dividing strip (71) to form a grid-like structure.

3. The metallized high voltage rupture membrane capacitor as defined in claim 1 wherein: the second conductive region (41) is divided by a second blank dividing strip (71) to form a T-shaped structure.

4. The metallized high voltage rupture membrane capacitor as defined in claim 1 wherein: the thicknesses of the first layer of metallized film (100) and the second layer of metallized film (200) are set to be 6.9 micrometers to 7.8 micrometers, the widths of the first margin edge (8) and the second margin edge (81) are set to be 1.5 millimeters to 3.2 millimeters, the widths of the first blank isolation strip (6) and the second blank isolation strip (61) are set to be 1.5 millimeters to 2 millimeters, the square resistances of the first conductive region (4) and the second conductive region (41) are set to be 8 omega/□ to 15 omega/□, the widths of the first fuse (3) and the third fuse (31) are set to be 0.23 millimeters to 0.32 millimeters, and the square resistances of the first fuse (3) and the third fuse (31) are set to be 4/□ to 7 omega/□.