Electronic module comprising an electronic card, a housing and a protective partition

Abstract

Title: Electronic module comprising an electronic card, a housing and a protective partition The invention relates to an electronic module comprising: An electronic card (1), A housing (2) in which the electronic card is placed, A protective partition (3) fixed to the housing and the electronic card, so that the electronic card is caught between the housing and the protective partition, At least one fixing element (20) arranged to secure the electronic card, the housing and the protective partition, characterized in that: the housing (2) and the protective partition (3) are made of electrically conductive materials, the housing (2), the electronic card and the protective partition (3) are fixed together by the at least one fixing element, at least one fixing element (20) comprises an electrical contact zone, and further ensures electrical contact between the housing (2),the protective partition (3) and an electrical ground of the electronic card. Figure for the abstract: Fig. 6,

Description

Title of the invention: Electronic module comprising an electronic card, a housing and a protective partition

[0001] The present invention relates to an electronic module comprising an electronic card, a housing and a protective partition.

[0002] This electronic module can be integrated into a vehicle with hybrid or purely electric propulsion, for example an automobile. More generally, “vehicle” encompasses, within the meaning of the present application, any form of mobility with purely electric, hybrid, thermal or other propulsion. “Vehicle” thus encompasses a machine rolling on land via four, three, two wheels or any other number of wheels, or a machine moving in the air or on water, or even in space.

[0003] It is known to place an electronic card in an insulating housing making it possible to protect the surrounding parts from the magnetic fields emitted by this electronic card during its operation.

[0004] The objective of the invention is to improve the realization of this electromagnetic protection function by reducing the space dedicated to this function on the electronic card, and by reducing the costs necessary for this electromagnetic protection.

[0005] The invention relates to an electronic module comprising: - An electronic card, - A box in which the electronic card is placed, - A protective partition fixed on the housing and the electronic card, so that the electronic card is taken between the housing and the protective partition, - At least one fixing element arranged to secure the electronic card, the housing and the protective partition, characterized in that: - the housing and the protective partition are made of electrically conductive materials, - the housing, the electronic card and the protective partition are fixed together by at least one fixing element, - at least one fixing element comprises an electrical contact zone, and further ensures electrical contact between the housing, the protective partition and an electrical ground of the electronic card.

[0006] According to one aspect of the invention, the housing and the protective partition form an electromagnetic protection enclosure, arranged to isolate the electronic card, and protect the electronic card from the outside, in particular from electromagnetic disturbances.

[0007] According to one aspect of the invention, the electromagnetic protection enclosure is also arranged to protect the external environment from electromagnetic fields produced by the electronic card.

[0008] According to one aspect of the invention, the electronic card comprises a flat substrate, onto which electronic components are soldered.

[0009] According to one aspect of the invention, electronic components are soldered on each face of the flat substrate.

[0010] Alternatively, all of the electronic components are soldered onto one side of the flat substrate.

[0011] According to one aspect of the invention, one face of the electronic card is placed in contact with the housing. This face will be called the lower face of the electronic card.

[0012] According to one aspect of the invention, one face of the electronic card is in electrical contact with the protective partition. This face will be called the upper face of the electronic card.

[0013] According to one aspect of the invention, the housing is made of aluminum.

[0014] According to one aspect of the invention, the protective partition is made of aluminum.

[0015] According to one aspect of the invention, the housing comprises a bottom, in particular a bottom sen possibly flat.

[0016] According to one aspect of the invention, the housing comprises a peripheral border, substantially perpendicular to the bottom of the housing, and surrounding the bottom of the housing.

[0017] According to one aspect of the invention, the peripheral edge and the bottom of the housing form a tank, in which the electronic card is placed.

[0018] According to one aspect of the invention, the housing comprises at least one contact zone, arranged to be placed in contact with the electronic card during assembly of the electronic module.

[0019] According to one aspect of the invention, the housing contains a plurality of contact areas, called housing contact areas.

[0020] According to one aspect of the invention, at least one of the contact areas of the housing is a support edge.

[0021] A support edge is a contact area of ​​the housing juxtaposed with the peripheral edge of the housing.

[0022] According to one aspect of the invention, the housing comprises at least one contact pad.

[0023] According to one aspect of the invention, the contact pads are volumes of the housing placed on the bottom of the case.

[0024] According to one aspect of the invention, each contact pad comprises a planar upper surface.

[0025] According to one aspect of the invention, the contact pads are round in shape.

[0026] Alternatively, the contact pads may be of any other shape, in particular rectangular or oval in shape.

[0027] According to one aspect of the invention, the upper surfaces of the contact pads of the housing are contact areas of the housing.

[0028] According to one aspect of the invention, at least one contact area of ​​the housing is an electrical contact area of ​​the housing and is arranged to ensure electrical contact between the housing and an electrical ground of the electronic card.

[0029] According to one aspect of the invention, all of the contact zones of the housing are planar and coplanar, and define a contact plane of the housing.

[0030] According to one aspect of the invention, the contact plane of the housing is parallel to the bottom of the housing.

[0031] According to one aspect of the invention, the contact plane of the housing is raised relative to the bottom of the housing.

[0032] For example, the contact plane is raised from the bottom of the case by a height H1 greater than 20 mm.

[0033] According to one aspect of the invention, the height H1 is greater than the maximum thickness of the electronic components soldered on the lower face of the electronic card, so that the electronic components soldered on the lower face of the electronic card are not in contact with the housing once the electronic card is placed in electrical contact with the housing.

[0034] According to one aspect of the invention, the bottom of the housing, the peripheral edge of the housing, the support edge and the contact pads are manufactured in a single block, for example by molding, or by machining.

[0035] Therefore, all of the electrical contact areas of the housing are electrically connected.

[0036] According to one aspect of the invention, the protective partition is of substantially planar shape. A main plane of the protective partition is defined.

[0037] According to one aspect of the invention, the protective partition contains a plurality of contact zones, called contact zones of the protective partition and arranged to be placed in contact with the electronic card during assembly of the electronic module.

[0038] According to one aspect of the invention, at least one of the contact zones of the protective partition is a contact edge of the protective partition.

[0039] A contact edge of the protective partition is a contact area juxtaposed with the periphery of the protective partition.

[0040] According to one aspect of the invention, the protective partition comprises at least one central contact zone.

[0041] The central contact areas are contact areas of the protective partition not connected to the periphery of the protective partition.

[0042] According to one aspect of the invention, at least one contact zone of the protective partition is an electrical contact zone of the protective partition, and is arranged to guarantee electrical contact between the protective partition and an electrical ground of the electronic card.

[0043] According to one aspect of the invention, all of the contact zones of the protective partition are flat and coplanar, and define a contact plane of the protective partition.

[0044] According to one aspect of the invention, the contact plane of the protective partition is parallel to the main plane of the protective partition.

[0045] According to one aspect of the invention, the contact plane of the protective partition is offset relative to the main plane of the protective partition by a height H2 greater than 12 mm.

[0046] According to one aspect of the invention, the height H2 is greater than the maximum thickness of the electronic components soldered on the upper face of the electronic card, so that the electronic components soldered on the upper face of the electronic card are not in electrical contact with the protective partition once the electronic card is placed in electrical contact with the protective partition.

[0047] According to one aspect of the invention, the electronic card comprises: - on the upper face, at least one upper contact area of ​​the electronic card, - on the lower face, at least one lower contact area of ​​the electronic card.

[0048] According to one aspect of the invention, at least one upper contact area of ​​the electronic card is an upper electrical contact area of ​​the electronic card.

[0049] According to one aspect of the invention, at least one lower contact area of ​​the electronic card is a lower electrical contact area of ​​the electronic card.

[0050] According to one aspect of the invention, the upper electrical contact areas and the lower electrical contact areas of the electronic card are electrically connected to the ground of the electronic card.

[0051] According to one aspect of the invention, the upper contact zones of the electronic card are placed opposite the contact zones of the protective partition, and are in contact with these contact zones of the protective partition.

[0052] According to one aspect of the invention, the lower contact zones of the electronic card are placed opposite the contact zones of the housing, and are in contact with these contact zones of the housing.

[0053] Thus, the electronic card is kept fixed between the housing and the protective partition.

[0054] According to one aspect of the invention, the lower electrical contact areas of the card electronics are placed opposite the electrical contact areas of the housing, and are in electrical contact with these electrical contact areas of the housing.

[0055] According to one aspect of the invention, the upper electrical contact zones of the electronic card are placed opposite the electrical contact zones of the protective partition, and are in electrical contact with these electrical contact zones of the protective partition.

[0056] Thus, the entire housing and the protective partition are electrically connected to the electrical ground of the electronic card.

[0057] At least one contact zone of the housing is placed opposite at least one contact zone of the protective partition.

[0058] At least one electrical contact area of ​​the housing is placed opposite at least one electrical contact area of ​​the protective partition.

[0059] A fixing element is a combination of characteristics of the electronic module making it possible to secure the housing, the electronic card, and the protective partition.

[0060] A fixing element comprises:

[0061] - a geometric characteristic of the electronic card,

[0062] - a geometric characteristic of the protective partition,

[0063] - a geometric characteristic of the housing

[0064] - and possibly at least one fixing part

[0065] A fixing element comprises: - a portion of an upper electrical contact area of ​​the electronic card, - a portion of a lower electrical contact area of ​​the electronic card, these two contact zones being placed opposite each other,

[0066] - a portion of an electrical contact zone of the housing placed opposite the portion of a lower electrical contact area of ​​the electronic card,

[0067] - a portion of an electrical contact area of ​​the protective partition placed in looking at the portion of an upper electrical contact area of ​​the electronic card,

[0068] For example, a fastening element comprises: - a hole in the electronic card, - a hole in the protective partition, - a hole in the housing, these holes being coaxial, and - a screw passing through all the holes and mechanically fixing the protective partition, the housing, and the electronic card.

[0069] According to another embodiment, a fixing zone comprises:

[0070] - a fixing hole in the electronic card

[0071] - a drilling respectively in the housing or the protective partition,

[0072] - a fixing pad formed respectively in the protective partition or the housing,

[0073] the fixing stud being arranged to be inserted by force into the holes to fix mechanically the protective partition, the housing, and the electronic card.

[0074] The electronic module comprises a cover forming a tank, arranged to be placed on the housing in order to close the housing.

[0075] The use of the fixing elements to make the electrical contact between the electronic card, the protective partition and the housing advantageously makes it possible to reduce the necessary space allocated on the card for the electromagnetic protection function. This thus makes it possible to reduce the size of the electronic card, and to reduce production costs.

[0076] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and several exemplary embodiments given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0077] [Fig-1] [Fig.l] is a schematic representation of a housing according to the invention.

[0078] [Fig.2] [Fig.2] is a schematic representation of the assembly of a housing and of an electronic card according to the invention.

[0079] [Fig.3] [Fig.3] is a schematic representation of a protective partition according to the invention.

[0080] [Fig.4] [Fig.4] is a schematic representation of the assembly of a housing, of an electronic card and a protective partition according to the invention.

[0081] [Fig.5] [Fig.5] is a schematic representation of the assembly of a module electronics according to the invention.

[0082] [Fig.6] [Fig.6] is a cross-sectional representation of the assembly of an electronic module electronics of the invention.

[0083] [Fig.7] [Fig.7] a close-up view of a fixing element of an electronic module electronics according to the invention.

[0084] The features, variants and the different embodiments of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0085] [Fig.l] shows a housing 2 of an electronic module 100 comprising a substantially flat bottom 6.

[0086] The housing comprises at least one contact zone of the housing 8, arranged to be placed in contact with the electronic card 1 during assembly of the electronic module 100.

[0087] The housing 2 comprises a peripheral border 7 substantially perpendicular to the bottom of the housing and surrounding the bottom of the housing 6.

[0088] The peripheral edge 7 and the bottom of the housing form a tank 11, in which the electronic card is placed.

[0089] The housing 2 contains a plurality of contact areas of the housing 8.

[0090] One of the contact zones of the housing 8 is a support edge 9, that is to say a contact zone of the housing 8 juxtaposed with the peripheral edge 7 of the housing.

[0091] The housing comprises an upper face 12, in particular a flat upper face parallel to the bottom of the housing 6.

[0092] The support border 9 is of substantially constant width, and extends along the entire peripheral border 7.

[0093] The housing 2 comprises at least one contact pad 10, i.e. a volume of the housing placed on the bottom of the housing 6. Each contact pad comprises a flat upper surface 13, these upper surfaces being contact zones of the housing.

[0094] The contact pads 10 are round in shape.

[0095] According to another embodiment not shown, the contact pads 10 may be of any other shape, in particular rectangular or oval.

[0096] At least one contact area of ​​the housing 8 is an electrical contact area of ​​the housing and is arranged to ensure electrical contact between the housing 2 and an electrical ground of the electronic card 1.

[0097] The bottom of the housing 6, the peripheral edge of the housing 7, the support edge 9 and the contact pads 10 are manufactured in a single block, for example by molding, or by machining.

[0098] Therefore, all of the electrical contact areas of the housing are electrically connected.

[0099] [Fig.2] shows the assembly of a housing 2 as illustrated in [Fig.1] and an electronic card 1 according to the invention.

[0100] The electronic card 1 is placed in the housing 2.

[0101] It comprises a flat substrate 5 on which electronic components, not shown here, are soldered.

[0102] Electronic components are soldered on each face of the flat substrate 5, or on only one of the faces of the flat substrate.

[0103] The electronic card 1 comprises:

[0104] - on the upper face, at least one upper contact zone 14 of the electronic card electronics,

[0105] - on the lower face, at least one lower contact zone 15 of the electronic card electronics, not visible in this figure.

[0106] The lower face of the electronic card is placed in contact with the housing 2.

[0107] At least one upper contact area 14 of the electronic card 1 is an area upper electrical contact area of ​​the electronic card, and at least one lower contact area 15 of the electronic card is a lower electrical contact area of ​​the electronic card.

[0108] These upper and lower electrical contact areas are electrically connected to the ground of the electronic card 1.

[0109] [Fig.3] shows a protective partition according to the invention.

[0110] The protective partition 3 is of substantially planar shape. A main plane of the protective partition is therefore defined.

[0111] The protective partition 3 contains a plurality of contact areas, called protective partition contact areas 16. These protective partition contact areas are planar and coplanar, and define a protective partition contact plane.

[0112] One of the contact zones of the protective partition 16 is a contact edge of the protective partition 17, namely a contact zone juxtaposed to the periphery of the protective partition.

[0113] The protective partition 3 also has a plurality of central contact zones 18.

[0114] The central contact zones 18 are contact zones of the partition of protection 16 not being connected to the periphery of the protective partition 19.

[0115] At least one contact area of ​​the protective partition 16 is an electrical contact area of ​​the protective partition, and is arranged to ensure electrical contact between the protective partition 3 and an electrical ground of the electronic card 1.

[0116] [Fig.4] shows the assembly of a housing 2, an electronic card 1 and a protective partition 3.

[0117] The protective partition 3 is fixed on the housing 2 and the electronic card 1, so that the electronic card is taken between the housing and the protective partition.

[0118] The housing 2 and the protective partition 1 form an electromagnetic protection enclosure arranged to isolate the electronic card, protect it from electromagnetic disturbances, and to protect the external environment from the electromagnetic fields produced by the electronic card.

[0119] The housing 2 and the protective partition 3 are made of electrically conductive materials, for example aluminum.

[0120] The lower contact areas 14 of the electronic card are placed opposite the contact areas of the housing 8, and are in contact with these electrical contact areas of the housing.

[0121] Furthermore, the upper contact zones of the electronic card 15 are placed opposite the contact zones of the protective partition 16, and are in contact with these contact zones of the protective partition.

[0122] Thus, the electronic card 1 is kept fixed between the housing 2 and the protective partition 3.

[0123] In addition, the lower electrical contact areas of the electronic card 1 are placed opposite the electrical contact areas of the housing 2, in electrical contact with these electrical contact areas of the housing.

[0124] The upper electrical contact areas of the electronic card 1 are placed opposite the electrical contact areas of the protective partition 3, in electrical contact with these electrical contact areas of the protective partition.

[0125] Thus, the entire housing 2 and protective partition 3 are electrically connected to the electrical ground of electronic card 1.

[0126] At least one contact zone of the housing 8 is placed opposite at least one contact zone of the protective partition 3, and at least one electrical contact zone of the housing 2 is placed opposite at least one electrical contact zone of the protective partition 3, on either side of the electronic card 1.

[0127] The electronic module 100 comprises a set of fixing elements 20 arranged to secure the electronic card 1, the housing 2 and the protective partition 3.

[0128] The housing 2, the electronic card and the protective partition 3 are therefore fixed together by the fixing elements 20.

[0129] [Fig.5] illustrates the assembly of an electronic module. The electronic module 100 comprises a cover 21 forming a tank, arranged to be placed on the housing 2 in order to close the housing.

[0130] [Fig.6] is a sectional view of an electronic module 100 once assembled, allowing the placement of the electronic card 1 to be seen between the housing 2 and the protective partition 3.

[0131] All of the contact zones of the housing 8 are flat and coplanar, and define a contact plane of the housing, parallel to the bottom of the housing 6 and raised relative to the bottom of the housing by a height greater than 12 mm greater than the maximum thickness of the electronic components soldered on the lower face of the electronic card 14, so that the electronic components soldered on the lower face of the electronic card are not in contact with the housing 2 once the electronic card is placed in electrical contact with the housing.

[0132] The contact plane of the protective partition 3 is parallel to the main plane of the protective partition, and is offset relative to the main plane of the protective partition by a height H2 greater than 12 mm, in particular greater than the maximum thickness of the electronic components soldered on the upper face of the electronic card 15, so that the electronic components soldered on the upper face of the electronic card are not in electrical contact with the protective partition once the electronic card is placed in electrical contact with the protective partition.

[0133] Furthermore, the contact zones of the housing 8 are electrical contact zones of the housing, and are arranged to guarantee electrical contact between the housing 2 and an electrical ground of the electronic card 1.

[0134] Similarly, the contact areas of the protective partition 16 are electrical contact areas of the protective partition, and are arranged to guarantee electrical contact between the protective partition 3 and an electrical ground of the electronic card 1.

[0135] [Fig. 7] shows a fixing element 20 according to one embodiment of the invention. A fixing element is a combination of characteristics of the electronic module making it possible to secure the housing 2, the electronic card 1, and the protective partition 3.

[0136] The fixing element 20 comprises: - a portion of an upper electrical contact area 22 of the electronic card 1, - a portion of a lower electrical contact area 23 of the electronic card 1, these two contact zones being placed opposite each other, - a portion of an electrical contact zone of the housing 24 placed opposite the portion of a lower electrical contact zone of the electronic card, - a portion of an electrical contact zone of the protective partition 25 placed opposite the portion of an upper electrical contact zone of the electronic card,

[0137] The fixing element also comprises: - a drilling in the electronic card 26, - a hole in the protective partition 27, - a drilling in the housing 28, these holes being coaxial, and - a screw passing through all the holes, not shown here, mechanically fixing the protective partition, the housing, and the electronic card.

[0138] According to another embodiment not shown, the fixing element comprises: - a mounting hole in the electronic card - a drilling respectively in the housing or the protective partition, - a fixing stud formed respectively in the protective partition or the housing, and the fixing stud being arranged to be inserted by force into the holes to mechanically fix the protective partition, the housing, and the electronic card.

[0139] The fixing element comprises an electrical contact zone, and further ensures electrical contact between the housing, the protective partition and an electrical ground of the electronic card.

Claims

Claims

1. Electronic module (100) comprising: - An electronic card (1), - A housing (2) in which the electronic card is placed, - A protective partition (3) fixed to the housing and the electronic card, so that the electronic card is taken between the housing and the protective partition, - At least one fixing element (20) arranged to secure the electronic card, the housing and the protective partition, characterized in that: - the housing (2) and the protective partition (20) are made of electrically conductive materials, - the housing (2), the electronic card (1) and the protective partition (3) are fixed together by the at least one fixing element, - at least one fixing element (20) comprises an electrical contact zone, and further ensures electrical contact between the housing (2), the protective partition (3) and an electrical ground of the electronic card (1).

2. Electronic module (100) according to claim 1, in which the housing (2) and the protective partition (3) form an electromagnetic protection enclosure arranged to protect the external environment from the electromagnetic fields produced by the electronic card (1), and the electronic card from the external environment, in particular from electromagnetic disturbances.

3. Electronic module (100) according to one of the preceding claims, in which a face of the electronic card (1) called the lower face of the electronic card is placed in contact with the housing (2) and a face of the electronic card called the upper face of the electronic card is in electrical contact with the protective partition (3).

4. Electronic module (100) according to one of the preceding claims, in which the housing (2) comprises a bottom (6), in particular a substantially flat bottom, and a peripheral edge (7), substantially perpendicular to the bottom of the housing (6) and surrounding the bottom of the housing.

5. Electronic module (100) according to one of the preceding claims, in which the housing (2) comprises at least one contact zone (8), arranged to be placed in contact with the electronic card (1) during assembly of the electronic module.

6. Electronic module (100) according to one of the preceding claims, in which the housing (2) comprises at least one contact pad (10), i.e. at least one volume of the housing placed on the bottom of the housing.

7. Electronic module (100) according to claim 5, and optionally according to claim 6, in which at least one contact zone (8) of the housing (2) is an electrical contact zone of the housing and is arranged to guarantee electrical contact between the housing (2) and an electrical ground of the electronic card (1).

8. Electronic module (100) according to claims 4 and 6, and optionally according to claim 7, in which the bottom of the housing (6), the peripheral edge of the housing (7) and the contact pads (10) are manufactured in a single block, for example by molding, or by machining.

9. Electronic module (100) according to claim 3, and possibly one of claims 4 to 7, in which the electronic card (1) comprises: - on the upper face, at least one upper contact zone of the electronic card (14), - on the lower face, at least one lower contact zone of the electronic card (15), at least one upper contact zone of the electronic card being an upper electrical contact zone of the electronic card, and at least one lower contact zone of the electronic card being a lower electrical contact zone of the electronic card.

10. Electronic module (100) according to one of the preceding claims, in which the protective partition (3) contains a plurality of contact zones (18), called contact zones of the protective partition and arranged to be placed in contact with the electronic card (1) during assembly of the electronic module.

11. Electronic module (100) according to claim 10, wherein at least one contact area of ​​the protective partition (18) is an electrical contact area of ​​the protective partition, and is arranged to ensure electrical contact between the protective partition (3) and a electrical ground of the electronic card (1).

12. Electronic module (100) according to claims 7, 9 and 11, wherein a fixing element (20) comprises: - a portion of an upper electrical contact area (14) of the electronic card, - a portion of a lower electrical contact area (15) of the electronic card, these two contact zones being placed opposite each other, - a portion of an electrical contact area of ​​the housing (2) placed opposite the portion of a lower electrical contact area of ​​the electronic card (1), - a portion of an electrical contact zone of the protective partition (3) placed opposite the portion of an upper electrical contact zone of the electronic card (1).

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