Electrical connection device with deployable electrical plug

Abstract

The invention relates to an electrical connection device comprising an electrical plug (2) having electrical contact blocks (200), having a front face and a rear face, and a storage case (3). The electrical plug (2) is capable of assuming a retracted position in which it is housed within the storage case (3) and an extended position in which it is at least partially outside the storage case (3). Elastic return means (4) are arranged between the rear face of the electrical plug (2) and the storage case (3), mechanically stressed by the electrical plug (2) when the electrical plug (2) is in its retracted position, and configured to eject the electrical plug (2) from its retracted position to its extended position. Figure to be published with the abbreviation: Figure 3B

Description

Title of the invention: Electrical connection device with deployable electrical plug Technical field of the invention

[0001] The present invention relates to an electrical connection device with a deployable electrical plug. State of the art

[0002] Various solutions have already been proposed for recharging an electric vehicle. By electric vehicle, we of course mean a 100% electric vehicle or a rechargeable hybrid type (for example electric and thermal or electric and hydrogen).

[0003] Some systems used for vehicle charging use a magnetic effect to attract an electrical plug associated with the electric vehicle to an electrical outlet connected to the network, and thus make an electrical connection when the plug and the outlet are mechanically coupled thanks to the magnetic effect. Such a solution is for example described in patent EP3469662B1. In this solution, the plug is for example arranged in a storage unit assembled on the vehicle.

[0004] On the electrical plug side, several constraints appear: - Maintain the integrity of the plug against external aggressions, in particular dust, shocks, - Ensure constant operation over time, whatever the conditions, particularly atmospheric (rain, snow, ice), - To be able to know the operating status on the plug side.

[0005] The aim of the invention is to propose an electrical connection device suitable for managing one or more of the constraints mentioned above. Statement of the invention

[0006] This aim is achieved by an electrical connection device comprising an electrical plug provided with electrical contact blocks, having a so-called front face and a so-called rear face, and a storage housing, the electrical plug being able to take a retracted position in which it is housed in the storage housing and a deployed position in which it is at least partially outside the storage housing (3), the device comprising: - Locking means, arranged to assume a first locking state to maintain the electrical plug inside the storage case in its retracted position or a second unlocking state, in which the plug is free to move from its retracted position to its deployed, - Elastic return means arranged between the rear face of the electrical plug and the storage housing, mechanically stressed by the electrical plug when the electrical plug is in its retracted position, and configured to eject the electrical plug from its retracted position to its deployed position when the locking means are in the unlocked state, - Means for controlling said locking means, configured to actuate said locking means between their locking state and their unlocking state.

[0007] According to one feature, the elastic return means comprise at least one spring washer.

[0008] According to another feature, the plug comprises a body, said electrical contact blocks being housed in its body.

[0009] According to another feature, the body of the plug has a cylindrical shape provided with several distinct radial openings, each forming access to a distinct electrical contact block.

[0010] According to another feature, the plug comprises a magnetic architecture comprising a yoke and several permanent magnets, said magnetic architecture being assembled on said body.

[0011] According to another feature, the plug comprises a cover fixed to said body and covering the magnetic architecture, said cover forming the front face of said plug.

[0012] According to another feature, the locking means comprise several latches (50) pivotally mounted on the storage housing of the plug, each latch in its locked state bearing against the front face of said plug to hold it in its retracted position against the elastic return means.

[0013] According to another feature, the device comprises a sealing gasket arranged between the plug and the storage housing.

[0014] According to another feature, the device comprises means for detecting the position of the plug relative to a fixed assembly incorporating an electrical outlet.

[0015] According to another feature, the detection means comprise one or more Hall effect sensors.

[0016] The invention also relates to an electrical connection system comprising an electrical socket, the system comprising an electrical connection device as defined above, in which the electrical plug is capable of being connected to said socket. Brief description of the figures

[0017] Other characteristics and advantages will appear in the detailed description which follows given with reference to the appended drawings in which: - [Fig.l] represents a complete electrical connection system including an electrical socket and an electrical connection device according to the invention, integrating an electrical plug to be connected to the electrical socket; - [Fig.2] represents the electrical connection device according to the invention, seen assembled, and in which the electrical plug is in the retracted position in the storage box; - Figures 3A and 3B represent the electrical connection device according to the invention, seen exploded, respectively from the side and in perspective; - Figures 4A and 4B schematically illustrate the two positions taken by the electrical plug relative to its storage housing, respectively in the retracted position in the housing and in the deployed position outside the housing; - [Fig.5] illustrates an example of the realization of the two magnetic architectures used in the system;

[0018] Detailed description of at least one embodiment

[0019] The invention relates to an electrical connection device which is in particular adapted to be used in an electrical connection system used for recharging an electric or rechargeable hybrid vehicle. In such a system such as that shown in [Fig.l], dedicated to recharging an electric or rechargeable hybrid vehicle, an electrical socket 1 is connected to the electrical network 4 and an electrical plug 2 is connected to the electrical power supply assembly 7 of the vehicle.

[0020] The system advantageously makes it possible to mechanically connect the plug 2 to the socket 1 automatically, without the intervention of an operator or a robot, using only magnetic and gravitational means, distributed on one side in the plug and on the other side in the socket.

[0021] For the remainder of the description, a connection direction is defined, corresponding to a main axis (A) along which the plug 2 is brought towards the socket 1 to connect to the socket 1.

[0022] In the remainder of the description, the terms "front" and "rear" as well as "top" and "bottom" and "upper" and "lower" are to be considered taking into account the longitudinal position along the main axis (A).

[0023] In the remainder of the description, the terms "interior" and "exterior" are to be considered according to the coaxial position relative to the main axis (A).

[0024] The device of the invention is for example intended to be used on the vehicle side. It thus comprises the electrical plug 2 (hereinafter referred to as the plug). The plug 2 is connected to the end of a cable 70 and is set in motion by a mechanism of way to connect to the electrical outlet 1.

[0025] The electrical socket 1 can be integrated into a fixed assembly as described in patent EP3469662B1. [Fig.l] shows an exemplary embodiment of the system, in which the socket is integrated into a tray 10, for example placed on the floor S.

[0026] In a non-limiting manner, the mechanism for moving the plug 2 may comprise a winder or a sliding system, associated with an electric motor, controlled to move the plug 2 towards the electrical outlet 1.

[0027] The device of the invention also comprises a storage housing 3 in which the plug 2 can be housed when it is not in use. This housing 3 is used to protect the plug 2, in particular its electrical contacts, from external aggression (dust, water, projectiles, etc.). The housing 3 is for example in the form of a bell developed around the main axis (A), pierced with an opening 30 ([Fig. 3A] and [Fig. 3B]) at the rear to allow at least the electrical cable 70 to which the plug 2 is connected to pass through. The cable is free to slide through said opening 30 when the plug 2 is set in motion.

[0028] The storage housing 3 can be made of metal or plastic.

[0029] The cylindrical internal volume of the housing 3 advantageously has a diameter internal diameter just greater than the external diameter of plug 2, so that plug 2 can fit without friction into housing 3, leaving a minimal and adjusted annular gap.

[0030] With reference to [Fig.2], [Fig.3A] and [Fig.3B], the plug comprises a body 20 and several electrical contact blocks (200 shown diagrammatically [Fig.3A] and [Fig.3B]), integrated into its body 20, each connected to one or more wires of the electrical cable 70.

[0031] This body 20 is for example in the form of a cylindrical part developed around the main axis (A), this part being for example made of plastic material.

[0032] The body of the plug 2 has a front face by which it can be mechanically bonded against the socket and an opposite rear face. This front face is devoid of any electrical contacts and closes the body of the plug on the side of its mechanical bonding plane against the socket 1.

[0033] The body 20, on the other hand, comprises several radial openings 201, each made to provide access to a separate electrical contact block 200 present in the body of the plug. According to a particular embodiment, the plug 2 is thus advantageously configured to establish electrical contacts with the socket 1 via several radial directions.

[0034] A sealing gasket 60 is advantageously placed between the body of the plug 2 and the storage housing 3, thus protecting access to the radial openings and therefore to the electrical contact blocks 200 of the plug 2.

[0035] The plug 2 also includes a magnetic architecture 21, used to mechanically couple to the socket, provided with a complementary magnetic architecture.

[0036] The magnetic architecture is fixed to the front of the body 20 of the plug 2. The device may comprise a front cover 22 attached to the body 20 of the plug 2 to cover the magnetic architecture 21, the cover 22 forming the front face of the plug 2, by which it can be mechanically stuck against the front face of the socket.

[0037] The plug may also include a rear cover 23 fixed to the rear of its body 20, this rear cover 23 forming the rear face of the plug 2.

[0038] When the plug 2 is magnetically glued to the socket 1, an electrical connection is also made between the electrical contact blocks of the plug 2 and the second electrical contact blocks of the socket 1, through the radial openings 201 present on the plug 2.

[0039] The two magnetic architectures used make it possible to ensure the bonding of the plug 2 to the socket 1 by magnetic effect. Different magnetic architectures allowing the bonding of the plug 2 to the socket 1 are described in particular in patent EP3317926B1 and in patent application WO2020 / 229321A1. These are applicable to the present invention but are to be considered in a non-limiting manner.

[0040] The two magnetic architectures advantageously comprise several permanent magnets. According to a particular feature, the two magnetic architectures operate in attraction when the plug is in a suitable angular position relative to the socket to establish the connection, or in repulsion when the plug 2 must be removed relative to the socket 1 during disconnection.

[0041] As an example, [Fig.5] shows a first magnetic architecture 11 present on the socket side 1 and a second magnetic architecture present on the plug side 2. The two magnetic architectures shown comprise a ferromagnetic yoke 111, 211 and one or more portions of permanent magnet fixed on said yoke.

[0042] On the first magnetic architecture 11, three permanent magnets 111_1, 111_2, 111_3 of a first set each extend over an angular range API of 55° on their annular portion and three permanent magnets 112_1, 112_2, 112_3 of a second set over an angular range AP2 of 55°.

[0043] Each of the three new permanent magnets of the second set is inserted between two permanent magnets of the first set, leaving a regular non-zero angular interval with these two magnets of the first set. The regular angular interval II is close to 5° between two adjacent magnets.

[0044] The permanent magnets of the first set and those of the second set are magnetically oriented along the main axis (A) and in opposite directions.

[0045] The second magnetic architecture 21 has only a first set of three permanent magnets 211_1, 211_2, 211_3 which are identical to the permanent magnets of the first magnetic architecture.

[0046] It should be noted that the two magnetic architectures 11, 21 are configured to ensure bonding of the plug 2 against the socket, by magnetic attraction effect, according to a given orientation, around the main axis. The two magnetic architectures 11, 21 are configured so that the plug 2 can take several distinct angular positions when it is bonded to the socket by magnetic effect.

[0047] For example, from the magnetic architectures presented in [Fig.5], the plug 2 can take three distinct angular positions, offset from each other by 120°. The plug can be in a first angular position, called 0°, a second angular position called -120° and in a third angular position called +120°.

[0048] Of course, the magnetic arrangements (angular ranges of the magnets and angular intervals between magnets) of the magnetic architecture can be adjusted.

[0049] According to a particular aspect of the invention, the device also comprises elastic return means 4, arranged between the rear face of the plug 2 and the bottom 31 of the bell forming the housing 3. These elastic return means 4 are fixed to the bottom of the bell. They are stressed in compression by the plug 2 when the latter is housed in the storage housing 2.

[0050] The device also comprises locking means arranged to assume a locking state in which they hold the plug 2 inside the storage housing 2, in a so-called retracted position. The locking means can move into an unlocking state, releasing the plug 2, which can then assume a second so-called deployed position. The plug 2 moves from its retracted position to its deployed position under the action of the elastic return means 4.

[0051] [Fig.4A] shows the plug 2 in its retracted position. Its front face is located inside the volume formed by the walls of the housing 3. It is held in this position by the locking means, configured in their locked state. In this position, the plug 2 comes to bear against the elastic return means 4 arranged between its rear face and the bottom 31 of the bell. In this retracted position, the radial openings 201 giving access to the electrical contact blocks 200 are not accessible, preventing any intrusion.

[0052] A seal is advantageously arranged between the storage housing 3 and the plug 2, in a plane lower than that containing the radial openings 201 of the plug 2, making it possible to ensure the sealing of the internal volume of the body of the plug with respect to the exterior when the latter is in its retracted position. This seal may be an O-ring 60 (shown in FIGS. 4A and 4B) for example placed in a groove made on the internal lateral face of the storage housing 3 or glued to this internal face. It allows to ensure the seal between the plug 2 and the housing 3 and thus makes it possible to avoid the use of a cover or lid to enclose the plug 2 in the storage housing 3. It thus protects access to the electrical contact blocks 200 present in the body of the plug 2 when the plug 2 is in its retracted position. Other sealing solutions could be envisaged. The seal could also be

[0053] [Fig.4B] shows the plug in its deployed position. The locking means are in their unlocked state, releasing the movement of the plug 2, driven in translation towards the outside of the bell thanks to the elastic return means 4. The plug 2 is thus ejected by the elastic return means 4 to exit the internal volume of the bell.

[0054] In a non-limiting manner, the elastic return means may be formed of several helical springs and / or advantageously of a spring washer 40 (as shown in the attached figures), for example a Belleville washer. Of course, other solutions could be envisaged.

[0055] In a non-limiting manner, the locking means may comprise several latches 50 pivotally mounted on the walls of the bell, each latch 50 being able to take a raised position in which it is in the unlocked state ([Fig.4B]) and a folded position against the front face of the plug 2, in which it is in the locked state ([Fig.4A]). The actuation of the locking means may for example be carried out electromagnetically or electrically.

[0056] The device comprises control means, configured to control the actuation of said locking means between their locked state and their unlocked state or vice versa. These control means may comprise a processing and control unit UC responsible for executing an operating sequence.

[0057] Advantageously, the device may comprise detection means responsible for monitoring the position of the plug 2 relative to the fixed assembly which carries the socket 1, towards which the plug 2 is approached to establish the connection.

[0058] These detection means may comprise one or more sensors 6. In a non-limiting manner, these may be Hall effect sensors arranged and distributed regularly around the periphery of the bell, at its front edge.

[0059] Of course, other types of sensors 6 could be used, for example "reed" type or MEMS type switches...

[0060] As an example, the sequence of operation could be as follows: Figure 3A:

[0061] - The processing and control unit UC receives a signal SI requesting connection of plug 2 to socket 1; - The processing and control unit UC can check that plug 2 is in its retracted position inside the housing 3; - The processing and control unit UC sends a control signal S2 to the locking means to control them to their unlocked state; - Locking the plug 2 in position in the housing 3 allows the mechanical tension on the cable 70 to be released, with slack being retained to allow the plug 2 to move from its retracted position to its deployed position; Figure 3B:

[0062] - The locking means are actuated towards their unlocked state, releasing the plug 2; The release of the plug 2 is permitted thanks to the sufficient slack left by the cable 70 at the end of which the plug 2 is positioned; - Actuated by the elastic return means 4, the plug 2 is ejected towards its deployed position; - The processing and control unit UC can control the means for moving the plug 2, for example the reel, to unwind the cable and bring the plug 2 close to the socket for connection;

[0063] The reverse sequence is implemented after disconnecting plug 2: - Receipt by the processing and control unit UC of a signal indicating the disconnection of plug 2 from socket 1; - The processing and control unit UC controls the means of moving the plug 2 to pull on the cable and bring it back towards the inside of the storage box 3; - The processing and control unit UC receives data from the detection means 6 and determines that the plug 2 is at least partially housed in the storage box 3; - The processing and control unit UC sends a signal to the locking means to put them into their locking state, locking the plug 2 in its retracted position. When closing, the latches 50 press against the front face of the plug and thus compress the elastic return means 4;

[0064] The device of the invention has numerous advantages, including: - A solution for ejecting the plug from its housing, allowing the elimination of all debris, gel and mud, which could prevent its extraction from the housing; - Protection of the plug and its contact blocks against external aggression, thanks to the storage box; The solution makes it possible in particular to do away with the use of a cover or lid on the storage box; - A simple manufacturing and assembly solution, offering the advantages aforementioned;

Claims

Claims

1. Electrical connection device comprising an electrical plug (2) comprising a body and provided with electrical contact blocks (200) housed in its body, the body of the electrical plug (2) having a cylindrical shape provided with several distinct radial openings, each forming access to a distinct electrical contact block (200), a so-called front face and a so-called rear face, the device comprising a storage housing (3), the electrical plug (2) being capable of taking a retracted position in which it is housed in the storage housing (3) to prevent access to its electrical contact blocks via said radial openings and a deployed position in which it is at least partially outside the storage housing (3), the device being characterized in that it comprises: - Locking means, arranged to assume a first locking state to maintain the electrical plug (2) inside the storage case (3) in its retracted position or a second unlocking state, in which the plug (2) is free to move from its retracted position to its deployed position, - Elastic return means (4) arranged between the rear face of the electrical plug (2) and the storage housing (3), mechanically stressed by the electrical plug (2) when the electrical plug (2) is in its retracted position, and configured to eject the electrical plug (2) from its retracted position to its deployed position when the locking means are in the unlocked state,

2.

3. - Means for controlling said locking means, configured to actuate said locking means between their locking state and their unlocking state. Device according to claim 1, characterized in that the elastic return means (4) comprise at least one spring washer (40). Device according to claim 14, characterized in that the plug comprises a magnetic architecture (21) comprising a yoke and several permanent magnets, said magnetic architecture (21) being assembled on said body (20).

4. Device according to claim 3, characterized in that the plug (2) comprises a cover (22) fixed to said body (20) and covering the magnetic architecture (21), said cover (22) forming the front face of said plug (2).

5. Device according to one of claims 1 to 4, characterized in that the locking means comprise several latches (50) pivotally mounted on the housing (3) for storing the plug, each latch in its locked state bearing against the front face of said plug to hold it in its retracted position against the elastic return means (4).

6. Device according to one of claims 1 to 5, characterized in that it comprises a sealing joint (60) arranged between the plug (2) and the storage housing (3).

7. Device according to one of claims 1 to 6, characterized in that it comprises means for detecting the position of the plug (2) relative to a fixed assembly incorporating an electrical socket (1).

8. Device according to claim 8, characterized in that the detection means comprise one or more Hall effect sensors (6).

9. Electrical connection system comprising an electrical socket, characterized in that it comprises an electrical connection device as defined in one of claims 1 to 8, in which the electrical plug (2) is capable of being connected to said socket.

Images