CAPACITIVE ELEMENT, POWER MODULE ASSEMBLY, AND CORRESPONDING MANUFACTURING METHOD.

Abstract

The invention relates to a capacitive element (1) comprising: a cylindrical housing (10) extending along a longitudinal axis (X); a mandrel (3) extending along said longitudinal axis (X);a reel (2), housed inside said casing (10) and formed of: a first film (20) having a first insulating portion (200) extended by a first conductive portion (201), and a second film (21) having a second insulating portion (210) extended by a second conductive portion (211), the two films (20, 21) being superimposed and wound along said longitudinal axis (X) around said mandrel (3) such that said first insulating portion (200) is in contact with said second insulating portion (210) and that said first conductive portion (201) and said second conductive portion (211) are opposite along said longitudinal axis (X), the first conductive portion (201) forming a first end of said reel (2), the second conductive portion (211) forming a second end of said reel (2), a first metallized layer (40) formed on an upper surface of said bobbin (2) at the location of said first end of said bobbin (2);a second metallized layer (41) formed on a lower surface of said coil (2) at the location of said second end of said coil (2); a first electrical connection (60) provided at least partially on an outer surface of said first metallized layer (40), in contact with said first metallized layer (40); a second electrical connection (61) provided at least partially on an outer surface of said second metallized layer (41), in contact with said second metallized layer (41), characterized in that said capacitive element (1) comprises a first electrical connector (50) connected to said first electrical connection (60), and a second electrical connector (51) connected to said second electrical connection (61), said first and second electrical connectors (50, 51) being configured to be directly connected to a power module (8).

Description

Title of the invention: CAPACITIVE ELEMENT, ASSEMBLY FOR POWER MODULE, AND CORRESPONDING MANUFACTURING METHOD. Scope of the invention

[0001] The present invention relates to the field of power electronics, and more specifically to the context of a DC voltage distribution and the capacitive interface between this distribution and the switching elements of a power converter.

[0002] More particularly, the invention relates to a capacitive element such as a power film capacitor allowing to limit the phenomena of self-induction, or inductive phenomena in English.

[0003] The invention could, for example, find an application in the aeronautical field and could be used in aircraft electronics. Prior art

[0004] Among the various electronic components implemented in the field of microelectronics, capacitive elements are among the most used.

[0005] A capacitor is a basic electronic component, consisting of two conductive plates, also called electrodes, in total influence and separated by a polarizable insulator, also called a dielectric. Its main property is the ability to store opposite electrical charges on its plates.

[0006] Among the different types of capacitors, film capacitors are the most commonly used passive components, such as coupling capacitors, to keep unwanted DC voltage parts away, or in frequency and oscillator circuits.

[0007] These capacitors are usually made in three stages, with the making of the coil by superimposing and winding two dielectric films around a plastic mandrel, then the projection of metallic particles on the ends of the dielectric films, and finally the formation of electrical links between the projections of metallic particles and radial outputs allowing a subsequent connection with other components such as a power module.

[0008] This connection with a power module is made in a conventional way via a busbar, or interconnection bar, in order to reduce the number of connections to the power module and to limit connection errors.

[0009] However, a disadvantage of such electrical installations is that they undergo self-induction phenomena, and therefore each generate parasitic inductances. Each parasitic inductance subsequently induces an overvoltage which is detrimental to the integrity of the installation and the operation of this type of switching component.

[0010] There is therefore a need to provide a solution to improve the operation of these switching components and to reduce the risk of creating self-induction phenomena. Description of the invention

[0011] The invention aims to remedy, at least in part, the aforementioned drawbacks above relating to the techniques of the prior art.

[0012] To this end, the invention relates to a capacitive element comprising: - a cylindrical casing extending along a longitudinal axis X; - a chuck extending along said longitudinal axis X; - a coil, housed inside said casing and formed: • of a first film having a first insulating portion extended by a first conductive portion, and • a second film equipped with a second insulating portion extended by a second conductive portion,

[0013] the two films being superimposed and wound along said longitudinal axis X around said mandrel so that said first insulating portion is in contact with said second insulating portion and that said first conductive portion and said second conductive portion are opposite along said longitudinal axis X, the first conductive portion forming a first end of said reel, the second conductive portion forming a second end of said reel, - a first metallized layer formed on an upper surface of said coil at the location of said first end of said coil; - a second metallized layer formed on a lower surface of said coil at the location of said second end of said coil; - a first electrical connection provided at least partially on an external surface of said first metallized layer, in contact with said first metallized layer; - a second electrical connection provided at least partially on an external surface of said second metallized layer, in contact with said second metallized layer.

[0014] According to the invention, said capacitive element comprises a first electrical connector connected to said first electrical link, and a second electrical connector connected to said second electrical link, said first and second electrical connectors being configured to be directly connected to a power module.

[0015] Thus, the proposed solution makes it possible to resolve at least in part some of the disadvantages of the prior art.

[0016] Indeed, thanks to the direct connection between the capacitive element and the power module, and therefore the elimination of the busbar to act as an intermediary between the capacitive element and the power module, the length of the electrical connection is reduced, and therefore the self-induction phenomenon is also reduced.

[0017] According to a particular aspect of at least one embodiment of the invention, said first and second electrical connectors are provided in projection from an upper surface of said housing, said second electrical connection extending opposite at least a part of said first electrical connection, said capacitive element further comprising a first insulating layer provided between said first electrical connection and said second electrical connection so as to electrically isolate said first electrical connection from said second electrical connection.

[0018] This allows the two electrical connectors to be on the same face of the capacitive element and thus simplifies the connection to a power module.

[0019] According to a particular aspect of at least one embodiment of the invention, said first insulating layer extends axially along said coil to said second end of said coil.

[0020] According to a particular aspect of at least one embodiment of the invention, said first insulating layer extends in projection from an upper surface of said housing between said first electrical connector and second electrical connector so as to electrically isolate said first electrical connector from said second electrical connector.

[0021] According to a particular aspect of at least one embodiment of the invention, said first insulating layer extends at least in part over one of said first electrical connector or second electrical connector from said upper surface so as to electrically insulate said first electrical connector from said second electrical connector.

[0022] According to a particular aspect of at least one embodiment of the invention, the capacitive element comprises a second insulating layer surrounding said coil so as to electrically isolate said second electrical connection of said housing.

[0023] According to a particular aspect of at least one embodiment of the invention, said second insulating layer extends:

[0024] - projecting from an upper surface of said housing between said first connector electrical and second electrical connector so as to electrically isolate said first electrical connector from said second electrical connector, and

[0025] - at least partly on one of said first or second electrical connectors electrical connector from said upper surface so as to insulate electrically said first electrical connector of said second electrical connector.

[0026] According to a particular aspect of at least one embodiment of the invention, said first electrical connector and / or said second electrical connector has a length along said longitudinal axis X of between 10 and 50 mm.

[0027] According to a particular aspect of at least one embodiment of the invention, said first electrical connector and / or said second electrical connector has a width measured along a direction orthogonal to said longitudinal axis X of between 5 and 30 mm.

[0028] According to a particular aspect of at least one embodiment of the invention, the capacitive element comprises a third electrical connector connected to said housing so as to form a mechanical mass, said third electrical connector being isolated from said first electrical connector and second electrical connector by a complementary insulating portion.

[0029] The invention also relates to an assembly comprising a power module and at least one capacitive element according to one of the aforementioned embodiments, said at least one capacitive element being directly electrically connected to said power module.

[0030] The invention also relates to a method for manufacturing a capacitive element according to one of the aforementioned embodiments, the method comprising the following successive steps: - formation of the coil by superimposing and winding the said first film and second film around the said mandrel so that the said first insulating portion is against the said second insulating portion and that the said first conductive portion and the said second conductive portion are opposite along a longitudinal axis X of the said capacitive element; - projection of metallic particles at the location of said first end of said coil so as to form a first metallized layer, and at the location of said second end of said coil so as to form a second metallized layer; - formation of a first electrical bond between said first connector and said first metallized layer, and of a second electrical bond between said second connector and said second metallized layer.

[0031] According to a particular aspect of at least one embodiment of the invention, the manufacturing process of a capacitive element further comprises a step of forming a first insulating layer between said first electrical bond and said second electrical bond so as to electrically isolate said first electrical bond from said second electrical bond. Presentation of the figures

[0032] The invention, and its various advantages, will be more easily understood in the light of the following description of an illustrative and non-limiting embodiment thereof, and the accompanying drawings, among which:

[0033] [Fig-1] is a schematic view of an assembly according to one embodiment of the invention;

[0034] [Fig.2A], [Fig.2B] and [Fig.2C] are schematic cross-sectional views respectively partial top, side section, and partial bottom section of a part of a capacitive element, according to the first embodiment, after the electrical bonding stage;

[0035] [Fig.3A], [Fig.3B] and [Fig.3C] are schematic cross-sectional views respectively partial top view, side view, and partial bottom view of part of a capacitive element, according to the first embodiment, after a step of laying a first insulating layer;

[0036] [Fig.4A], [Fig.4B] and [Fig.4C] are schematic cross-sectional views respectively partial top, side section, and partial bottom section of a part of a capacitive element, according to the first embodiment, the second electrical connection extending opposite at least a part of the first electrical connection;

[0037] [Fig.5A], [Fig.5B] and [Fig.5C] are schematic cross-sectional views respectively partial top view, side view, and partial bottom view of part of a capacitive element, according to the first embodiment, after a step of laying a second insulating layer;

[0038] [Fig.6A] and [Fig.6B] are schematic views respectively in partial top section and in side section of a part of a capacitive element, according to a second embodiment of the invention;

[0039] [Fig.7A] and [Fig.7B] are schematic views respectively in partial top section and in side section of a part of a capacitive element, according to a third embodiment of the invention;

[0040] [Fig.8A] and [Fig.8B] are schematic views respectively in partial section top and side section views of part of a capacitive element, according to a fourth embodiment of the invention, and

[0041] [Fig.9A] and [Fig.9B] are schematic views respectively in partial top section and in side section of a part of a capacitive element, according to a fifth embodiment of the invention.

[0042] Detailed description of an embodiment of the invention

[0043] It should be noted that the invention applies to any type of capacitive element such as a power film capacitor allowing the limitation of self-induction phenomena, or selfic phenomena in English, which could for example find an application in the aeronautical field, and could be used within aircraft electronics, in particular in a power module assembly comprising at least one capacitive element 1.

[0044] Such a power capacitor can be of the polypropylene film type, polyester film, polyethylene film, or polycarbonate film.

[0045] More particularly, such a power capacitor can be particularly adapted to be subjected to a current of intensity between a few amperes and a few hundred amperes.

[0046] A first embodiment of the invention is now presented in relation to Figures 1 to 5C.

[0047] As illustrated, the capacitive element 1 comprises: - a cylindrical casing 10 extending along a longitudinal axis X; - a chuck 3 extending along the longitudinal axis X; - a coil 2, housed inside the casing 10.

[0048] This housing 10 can for example be made from a material that is at least partially insulating.

[0049] The reel 2 is formed of a first film 20 having a first insulating portion 200 extended by a first conductive portion 201, and of a second film 21 having a second insulating portion 210 extended by a second conductive portion 211.

[0050] The two films 20, 21 are superimposed and wound around the mandrel 3 so that the first insulating portion 200 is in contact with the second insulating portion 210 and that the first conductive portion 201 and the second conductive portion 211 are opposite along the longitudinal axis X corresponding to the longitudinal axis of the housing and also of the capacitive element.

[0051] This coil 2 is formed during the manufacturing process, during the coil 2 formation step by superimposing and winding the first film 20 and second film 21 around the mandrel 3 so that the first insulating portion 200 is against the second insulating portion 210 and that the first conductive portion 201 and the second conductive portion 211 are opposite along the longitudinal axis X of the capacitive element 1.

[0052] It should be noted that the first conductive portion 201 forms a first end of the coil, and that the second conductive portion 211 forms a second end of the coil.

[0053] The capacitive element further comprises: - a first metallized layer 40 formed on an upper surface of the coil 2 at the location of the first end of the coil 2; - a second metallized layer 41 formed on a lower surface of the coil 2 at the location of the second end of the coil 2.

[0054] These metallized layers are formed by spraying. In other words, they are formed during the manufacturing process by spraying metallic particles at the first end of the reel 2 so as to form a first metallized layer 40, and at the second end of the reel 2 so as to form a second metallized layer 41.

[0055] Furthermore, the capacitive element 1 includes a first electrical connector 50 intended to be in contact with the first metallized layer 40, and a second electrical connector 51 intended to be in electrical contact with the second metallized layer 41. These first electrical connector 50 and second electrical connector 51 are configured to be directly connected to a power module 8.

[0056] More specifically, the first electrical connector 50 is connected to a first electrical link 60 which is itself connected to the first metallized layer 40, and the second electrical connector 51 is connected to a second electrical link 61 which is itself connected to the second metallized layer 41.

[0057] Thanks to this direct link between the capacitive element and the power module and therefore to the suppression of the busbar to act as an intermediary between the capacitive element and the power module, the length of the electrical link is reduced and therefore the self-induction phenomenon is also reduced.

[0058] Figure [Fig. 1] illustrates in particular such an assembly comprising a power module 8 and one or more capacitive elements, here a capacitive element 1 directly electrically connected to the power module 8. Here, the first electrical connector 50 is configured to be directly connected to a first terminal 80 of the power module 8 while the second electrical connector 51 is configured to be directly connected to a second terminal 81 of the power module 8.

[0059] These electrical bonds are formed during the manufacturing process, and more particularly during the step of forming a first electrical bond 60 between the first electrical connector 50 and the first metallized layer 40, and a second electrical bond 61 between the second electrical connector 51 and the second metallized layer 41.

[0060] Thus, the first electrical bond 60 is provided here on an external surface of the first metallized layer 40, in contact with this first metallized layer 40. For its part, the second electrical bond 61 is provided on an external surface of the second metallized layer 41, in contact with this second metallized layer 41.

[0061] According to various embodiments, and generally, the first electrical connection is provided at least partially on an external surface of the first metallized layer, in contact with the first metallized layer.

[0062] Similarly, according to different embodiments, and in general, the second electrical connection is provided at least partially on an external surface of the second metallized layer, in contact with the second metallized layer.

[0063] As illustrated in particular in figures 4B and 5B, the first electrical connector 50 and second electrical connector 51 are provided in projection from an upper surface 100 of the housing 10.

[0064] In other words, the first electrical connector 50 and the second electrical connector 51 open onto the same face of the housing 10 of the capacitive element.

[0065] Therefore, and in order to ensure the connection between the second electrical connector 51 and the outer surface of the second metallized layer 41, the second electrical link 61 extends opposite at least a part of the first electrical link 60.

[0066] In order to electrically isolate the first electrical bond 60 from the second electrical bond 61, the capacitive element 1 further comprises a first insulating layer 70 provided between the first electrical bond 60 and the second electrical bond 61.

[0067] As can be seen for example in [Fig.3B], in this embodiment, the first insulating layer 70 extends axially along the coil 2 to the second end of the coil 2.

[0068] In other words, the first insulating layer 70 extends beyond the first electrical connection 60, axially on either side of this first electrical connection 60, on both sides of the coil 2 and stops before coming into contact with the second metallized layer 41.

[0069] Furthermore, in this document, and so as to electrically isolate the second electrical connection 61 from the housing 10, the capacitive element comprises a second insulating layer 71 surrounding the coil 2. Such a second insulating layer is illustrated more particularly in [Fig. 5B]. As can be seen in this figure, the second insulating layer 71 completely surrounds the coil 2 and the various layers attached to it, with the exception of the first electrical connector 50 and the second electrical connector 51, which protrude from this second insulating layer 71.

[0070] In this first embodiment presented, the first insulating layer 70 extends in projection from an upper surface 100 of the housing 10 between the first electrical connector 50 and second electrical connector 51 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0071] More particularly, here, and as can be seen for example in [Fig.4B], the first insulating layer 70 extends partly over the first electrical connector 50 from the upper surface 100 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0072] In other words, the first insulating layer 70 extends partly over the first electrical connector 50 from the upper surface 100 so as to form a sheath around the base of the first electrical connector 50.

[0073] According to other embodiments of the invention, the first insulating layer can extend at least partially over one of the first electrical connector or second electrical connector from the upper surface so as to electrically isolate the first electrical connector from the second electrical connector.

[0074] In this first embodiment, the first electrical connector 50 has a length along the longitudinal axis X of between 10 and 50 mm. Furthermore, the second electrical connector 51 has a length along the longitudinal axis X of between 10 and 50 mm.

[0075] Furthermore, in this first embodiment, the first electrical connector 50 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm. In addition, the second electrical connector 51 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm.

[0076] A second embodiment of the invention is now presented in relation to Figures 6A and 6B.

[0077] The elements common with the first embodiment are not detailed again.

[0078] In this second embodiment presented, the first insulating layer 70 extends in projection from an upper surface of the housing between the first electrical connector 50 and the second electrical connector 51 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0079] In addition, the second insulating layer 71 also extends in projection from an upper surface of the housing between the first electrical connector 50 and the second electrical connector 51 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0080] More particularly, here, and as can be seen for example in [Fig. 6B], the first insulating layer 70 extends partially onto the first electrical connector 50 from the upper surface so as to electrically insulate the first electrical connector 50 from the second electrical connector 51, and the second insulating layer 71 extends partially onto the second electrical connector 51 from the surface greater than 100 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0081] In other words, the first insulating layer 70 extends partly over the first electrical connector 50 from the upper surface 100 and the second insulating layer 71 extends partly over the second electrical connector 51 from the upper surface 100 so as to form sheaths around the base of the first electrical connector 50 and the second electrical connector 51.

[0082] In this second embodiment, the first electrical connector 50 has a length along the longitudinal axis X of between 10 and 50 mm while the second electrical connector 51 has a length along the longitudinal axis X of between 10 and 50 mm.

[0083] Furthermore, in this second embodiment, the first electrical connector 50 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm while the second electrical connector 51 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm.

[0084] A third embodiment of the invention is now presented in relation to Figures 7A and 7B.

[0085] The elements common with the other embodiments presented are not detailed again.

[0086] In this third embodiment, the second insulating layer 71 extends in projection from an upper surface of the housing between the first electrical connector 50 and the second electrical connector 51 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0087] More specifically, here, and as can be seen for example in [Fig. 7B], the second insulating layer 71 extends between the first electrical connector 50 and the second electrical connector 51, without, however, being in contact with either of these electrical connectors. This extension of the second insulating layer 71 forms a separating wall between the first electrical connector 50 and the second electrical connector 51.

[0088] In this third embodiment, the first electrical connector 50 and the second electrical connector 51 are substantially identical and have a length along the longitudinal axis X of between 10 and 50 mm, and a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm.

[0089] A fourth embodiment of the invention is now presented in relation to Figures 8A and 8B.

[0090] The elements common with other embodiments are not detailed again.

[0091] In this fourth embodiment, the second insulating layer 71 extends in projection from an upper surface of the housing between the first electrical connector 50 and the second electrical connector 51 so as to electrically isolate the first electrical connector 50 from the second electrical connector 51.

[0092] More specifically, here, and as can be seen for example in [Fig. 8B], the second insulating layer 71 extends between the first electrical connector 50 and the second electrical connector 51, without, however, being in contact with either of these electrical connectors. This extension of the second insulating layer forms a separating wall between the first electrical connector 50 and the second electrical connector 51.

[0093] Furthermore, in this fourth embodiment presented, the capacitive element includes a third electrical connector 52 connected to the housing so as to form a mechanical mass.

[0094] As illustrated in these figures 8A and 8B, this third electrical connector 52 is isolated from the first electrical connector 50 and second electrical connector 51 by an additional insulating portion 73.

[0095] This additional insulating portion 73 extends in projection from an upper surface of the housing between the first electrical connector 50 and second electrical connector 51 on the one hand, and the third connector 52 on the other hand so as to electrically isolate the third connector 52 from the first electrical connector 50 and second electrical connector 51.

[0096] More specifically, here, and as can be seen for example in [Fig. 8B], this additional insulating portion 73 extends between the electrical connectors without, however, being in contact with any of these electrical connectors. This additional insulating portion 73 here forms a separating wall between the first electrical connector 50 and the second electrical connector 51 on the one hand, and the third connector 52 on the other.

[0097] It should be noted that, in this embodiment, the additional insulating portion 73 is in contact with the extension of the second insulating layer 71, the combination of the two having a T-shape along a radial plane of the capacitive element.

[0098] In this fourth embodiment, the first electrical connector 50 has a length along the longitudinal axis X of between 10 and 50 mm, the second electrical connector 51 has a length along the longitudinal axis X of between 10 and 50 mm, and the third electrical connector 52 has a length along the longitudinal axis X of between 10 and 50 mm.

[0099] Furthermore, in this fourth embodiment, the first electrical connector 50 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm, the second electrical connector 51 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm, and the third electrical connector 52 has a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm.

[0100] A fifth embodiment of the invention is now presented in relation to Figures 9A and 9B.

[0101] The elements common with the other embodiments presented are not detailed again.

[0102] In this fifth embodiment, the second insulating layer 71 extends in projection from an upper surface of the housing between the first electrical connector 50' and second electrical connector 51' so as to electrically isolate the first electrical connector 50' from the second electrical connector 51'.

[0103] More specifically, here, and as can be seen for example in [Fig. 9A], the second insulating layer 71 extends between the first electrical connector 50' and the second electrical connector 51', without, however, being in contact with either of these electrical connectors. This extension of the first insulating layer forms here a separating wall between the first electrical connector 50' and the second electrical connector 51'.

[0104] The second insulating layer 71 also extends, in this embodiment, by means of two walls formed on either side of the first electrical connector 50' and the second electrical connector 51', without however being in contact with one of these electrical connectors.

[0105] In this way, and according to a radial plane of the capacitive element, the electrical connectors are intercalated between the walls formed by the second insulating layer 71.

[0106] Furthermore, the first electrical connector 50' and second electrical connector 51' each have a width measured along a direction orthogonal to the longitudinal axis X of between 5 and 30 mm and are arranged so as to be opposite each other along a radial plane.

[0107] More particularly, in this embodiment, and in a plane orthogonal to the longitudinal axis X, the first electrical connector 50' and second electrical connector 51' are symmetrical with center the point on the longitudinal axis X belonging to this orthogonal plane.

Claims

1. Demands Capacitive element (1) comprising: - a cylindrical casing (10) extending along a longitudinal axis (X); - a mandrel (3) extending along said longitudinal axis (X); - a coil (2), housed inside said casing (10) and formed of: • a first film (20) provided with a first insulating portion (200) extended by a first conductive portion (201), and • of a second film (21) provided with a second insulating portion (210) extended by a second conductive portion (211), the two films (20, 21) being superimposed and wound along said longitudinal axis (X) around said mandrel (3) so that said first insulating portion (200) is in contact with said second insulating portion (210) and that said first conductive portion (201) and said second conductive portion (211) are opposite along said longitudinal axis (X), the first conductive portion (201) forming a first end of said reel (2), the second conductive portion (211) forming a second end of said reel (2), - a first metallized layer (40) formed on an upper surface of said coil (2) at the location of said first end of said coil (2); - a second metallized layer (41) formed on a lower surface of said coil (2) at the location of said second end of said coil (2); - a first electrical connection (60) provided at least partially on an external surface of said first metallized layer (40), in contact with said first metallized layer (40); - a second electrical connection (61) provided at least partially on an external surface of said second metallized layer (41), in contact with said second metallized layer (41), characterized in that said capacitive element (1) comprises a first electrical connector (50) connected to said first electrical link (60), and a second electrical connector (51) connected to said second electrical link (61), said first and second electrical connectors (50,51) being configured to be directly connected to a power module (8).

2. Capacitive element (1) according to claim 1, characterized in that said first and second electrical connectors (50,51) are provided in projection from an upper surface (100) of said housing (10), said second electrical connection (61) extending opposite at least a part of said first electrical connection (60), said capacitive element (1) further comprising a first insulating layer (70) provided between said first electrical connection (60) and said second electrical connection (61) so as to electrically isolate said first electrical connection (60) from said second electrical connection (61).

3. Capacitive element (1) according to claim 2, characterized in that said first insulating layer (70) extends axially along said coil (2) to said second end of said coil (2).

4. Capacitive element (1) according to any one of claims 2 or 3, characterized in that said first insulating layer (70) extends in projection from an upper surface (100) of said housing (10) between said first electrical connector (50) and second electrical connector (51) so as to electrically isolate said first electrical connector (50) from said second electrical connector (51).

5. Capacitive element (1) according to claim 4, characterized in that said first insulating layer (70) extends at least in part over one of said first electrical connector (50) or second electrical connector (51) from said upper surface (100) so as to electrically isolate said first electrical connector (50) from said second electrical connector (51).

6. Capacitive element (1) according to any one of claims 2 to 5, characterized in that it comprises a second insulating layer (71) surrounding said coil (2) so as to electrically isolate said second electrical connection (61) from said casing (10).

7. Capacitive element (1) according to the preceding claim, characterized in that said second insulating layer (71) extends: - in projection from an upper surface (100) of said housing (10) between said first electrical connector (50) and second electrical connector (51) so as to electrically isolate said first electrical connector (50) from said second electrical connector (51), and - at least in part on one of said first electrical connector (50) or second electrical connector (51) from said upper surface (100) so as to electrically isolate said first electrical connector (50) from said second electrical connector (51).

8. Capacitive element (1) according to any one of claims 1 to 7, characterized in that it comprises a third electrical connector (52) connected to said housing (10) so as to form a mechanical mass, said third electrical connector (52) being isolated from said first electrical connector (50) and second electrical connector (51) by a complementary insulating portion (73).

9. Assembly comprising a power module (8) and at least one capacitive element (1) according to any one of claims 1 to 8, said at least one capacitive element (1) being directly electrically connected to said power module (8).

10. A method for manufacturing a capacitive element (1) according to any one of claims 1 to 9, the method comprising the following successive steps: - forming the coil (2) by superimposing and winding said first film (20) and second film (21) around said mandrel (3) such that said first insulating portion (200) is against said second insulating portion (210) and that said first conductive portion (201) and said second conductive portion (211) are opposite along a longitudinal axis (X) of said capacitive element (1); - projecting metallic particles at said first end of said coil (2) so as to form a first metallized layer (40), and at said second end of said coil (2) so as to form a second metallized layer (41); formation of a first electrical bond between said first connector (50) and said first metallized layer (40), and of a second electrical bond between said second connector (51) and said second metallized layer (41).

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