High-voltage relays used in drive or charging circuits of electric vehicles

Abstract

The present invention relates to a high-voltage relay (1) for a drive or charging circuit (41) of an electric vehicle. In order to configure the high-voltage relay (1) to be suitable for high current and insensitive to shock, the high-voltage relay (1) includes a magnetic drive assembly (3) having two yokes (5, 7) spaced apart from each other and an armature (17) that can be driven by the magnetic drive unit (3), wherein the armature (17) is configured as a rocker (19) including two arms (21, 23) extending away from the first yoke (5) and tiltable between an open position (27) and a switched position (25) and mounted on the first yoke (5) of the two yokes (5, 7), wherein the first arm (21) of the two arms (21, 23) is provided with a switch contact assembly (39), and including the magnetic circuit (29) of the two yokes (5, 7) being closed by the second arm (23) in the switched position (25).

Description

Technical Field

[0001] This invention relates to a high-voltage relay for drive and / or charging circuits of electric vehicles. Background Technology

[0002] High voltages are commonly used in the drive and charging components of electric vehicles. High amperages may also occur during charging and during the operation of battery-electric vehicles. Charging stations with voltages of 400V and 800V are already common. Higher voltages are conceivable in the future. Currents exceeding 15kA may occur briefly during operation. Therefore, the drive and charging components of electric vehicles must be able to carry these currents for short periods without opening the contacts with high power consumption due to the repulsive effect of high current.

[0003] Furthermore, it is essential to reliably prevent accidental disconnection or closure of circuits due to high voltage and current. This is especially important in the event of severe vibrations or shocks, such as those that may occur while driving an electric vehicle or during an accident. Summary of the Invention

[0004] Therefore, the object of the present invention is to provide a high-voltage relay for the drive and / or charging circuit of an electric vehicle, which enables the electric vehicle to operate safely even under high voltage and high ampere conditions, and prevents accidental disconnection or closure due to the high acceleration (a>50g) of the circuit connected to the high-voltage relay.

[0005] According to the invention, this objective is achieved because the high-voltage relay includes a magnetic drive assembly having two yokes spaced apart from each other and an armature that can be driven by the magnetic drive unit, wherein the armature is configured as a rocker arm including two arms extending from the first yoke and tiltable between an open position and a switched position and mounted on the first yoke of the two yokes, wherein the first arm of the two arms is provided with a switch contact assembly, and includes the magnetic circuit of the two yokes being closed by the second arm in the switched position.

[0006] The high-voltage relay according to the present invention achieves the above-mentioned objectives in a simple manner. Because it is configured as a rocker arm, in the event of external disturbance (e.g., impact), both arms can accelerate equally. The forces on the two arms can cancel each other out. This prevents unintentional switching to the switching or open position. Therefore, the relay is shock-resistant.

[0007] Safety is also enhanced because the two arms perform different tasks, as the second arm can be associated only with closing the magnetic circuit, while the first arm is responsible for switching the high-voltage relay's contact. Spatial separation is achieved due to the rocker arm configuration. Since the rocker arm is specifically mounted on the first yoke of the two yokes, when the magnetic circuit is closed, the rocker arm can be pulled towards the first yoke along its tilting axis and supported on the first yoke. Simultaneously, the second arm closes the magnetic circuit by abutting against the second yoke. This arrangement achieves high mechanical stability for the high-voltage relay. The high-voltage relay according to the invention can be used for typical charging voltages of <1000V and higher. Furthermore, it can carry currents up to 15kA for short periods, where a short period is defined as a time interval of less than 2ms.

[0008] The solution according to the invention can be further improved through various configurations, which are advantageous in themselves and can be randomly combined. These configurations and their associated advantages will be described below.

[0009] The two arms are preferably not only far from the first yoke extension, but also far from each other.

[0010] The magnetic drive unit preferably includes a core. Furthermore, the magnetic drive unit may include a coil body that at least partially surrounds the core and has at least one coil winding.

[0011] The two yokes are preferably connected together by a core and separated by the core. The two yokes preferably extend substantially transversely to the longitudinal axis of the core. The core may be part of a magnetic circuit.

[0012] In the switching position, the magnetic circuit preferably includes a second arm, two yokes, and a core.

[0013] The rocker arm can be configured in a V-shape. The imaginary extensions of the two arms can form acute angles with the longitudinal axis of the core. The second arm, which closes the magnetic circuit in the switching position, is preferably positioned parallel to the longitudinal axis of the core on both yokes. The second arm preferably does not have a switching contact assembly.

[0014] To isolate the switch contact assembly from the magnetic circuit, the first arm preferably protrudes above the magnetic drive unit. In other words, the first arm protrudes beyond the second yoke on the first yoke.

[0015] High-voltage relays can be configured to maintain the appropriate switching position without accidental switching, even under impacts up to 90g. "g" represents the gravitational acceleration of 9.81 m / s². Shock resistance can be further enhanced by configuring the armature as a rocker arm.

[0016] To achieve good balance of the rocker arm and make the relay more shock-resistant, the moments of inertia of the two arms relative to the tilt axis of the rocker arm are preferably equal. The term "equal" means that the deviation does not exceed 10%. When viewed along the longitudinal axis of the core, the center of gravity of the rocker arm is preferably at the height of the tilt axis. When viewed along the longitudinal axis of the core, the tilt axis is preferably located at the height of the first yoke.

[0017] The armature is preferably configured to roll from an open position to a switched position, particularly on the first yoke. This rolling motion allows for a smooth transition from the open to the switched position. Furthermore, external supports or load-bearing structures may not be necessary to support the armature against the strong magnetic field of the core. Instead, the armature supports itself on the first yoke during rolling. The armature may have a semi-circular profile on the side facing the first yoke to facilitate rolling. This semi-circular profile is preferably positioned at the height of the inclined axis.

[0018] As an alternative to the semi-circular outline on the armature, a semi-circular outline can be present at the yoke, along which the armature can roll.

[0019] At least in the open position, an air gap can exist between the armature and the first yoke. This helps prevent residual magnetism in the armature. Instead of an air gap, lubricant can be present between the armature and the first yoke. Therefore, wear on the armature and / or the first yoke during operation, as well as wear on the high-voltage relay, can be reduced or avoided.

[0020] A switch contact assembly may include at least one switch contact and at least one insulating element, through which the switch contact is insulated from at least the second arm. The insulating element is preferably disposed between the metal portion of the first arm and the switch contact. At least one switch contact is thus insulated from the remainder of the armature. The insulating element is preferably at least partially made of plastic material.

[0021] At least one switch contact is preferably permanently connected to the load terminal of the high-voltage relay in a conductive manner. For this purpose, at least one switch contact can be connected to the load terminal of the high-voltage relay, for example, via a flexible electrical conductor. The flexible electrical conductor can be, for example, stranded wire, stranded cable, braided cable, or a bundle of thin copper sheets, as known from contact movable welding joints. Alternatively, the flexible conductor can be formed of a resiliently deflectable conductor.

[0022] To conduct, especially, high currents, the switching contact assembly preferably comprises two switching contacts, each permanently connected to the same load terminal of the high-voltage relay. The two switching contacts are preferably connected to a common load terminal, each having a dedicated flexible conductor. By dividing the switching contacts into two, the amperage of each contact can be halved. The advantage of halving the amperage of each contact is that, at high currents, the electromagnetic repulsion between the switching contact and its mating contact is reduced. This, in turn, means that the magnetic attraction of the magnetic drive assembly required to hold the armature in the switched position is smaller. This, in turn, leads to a reduction in the coil current demanded in the coil body.

[0023] The high-voltage relay may include a locking device that prevents the armature from performing movement away from the first yoke by at least a predetermined amount. In other words, the armature may be positioned between the locking device and the first yoke. In the event of mechanical shock or vibration, the locking device prevents the armature from moving away from the rest of the magnetic drive assembly.

[0024] A particularly simple locking device configuration can be obtained when the high-voltage relay also includes a housing and the locking device includes at least one protrusion on the armature (particularly along an inclined axis) and a barrier on the housing (configured for abutting the protrusion). Alternatively, the housing may include at least one protrusion configured to abut against the armature. Attached Figure Description

[0025] The invention will now be explained in more detail with reference to the accompanying drawings, using examples of advantageous embodiments. The combination of features illustrated by way of example in the embodiments, depending on the characteristics of the high-voltage relay according to the invention necessary for a particular application, can be supplemented by other features explained above. Based on the above explanation, individual features may also be omitted in the described embodiments, where the effect of that feature is irrelevant to the specific application. The same reference numerals in the drawings are always used for elements having the same function and / or the same structure, wherein:

[0026] Figure 1 A schematic diagram of a high-voltage relay in a switching position according to the present invention is shown;

[0027] Figure 2 It is shown in the open position. Figure 1 A schematic diagram of a high-voltage relay;

[0028] Figure 3 An advantageous embodiment of the high-voltage relay according to the invention is shown in top view;

[0029] Figure 4 Shown in perspective Figure 3 A perspective view of a high-voltage relay;

[0030] Figure 5 It shows Figure 3 A perspective view of the switching contact assembly of a high-voltage relay;

[0031] Figure 6 It shows Figure 5 A longitudinal sectional view of the switch contact assembly;

[0032] Figure 7 It shows Figure 3 A perspective view of the armature of a high-voltage relay; and

[0033] Figure 8 It shows Figure 3 A perspective view of the lower part of the housing of a high-voltage relay. Detailed Implementation

[0034] The basic structure and function of the high-voltage relay 1 according to the present invention will first refer to Figure 1 and Figure 2 Let's have a discussion.

[0035] The high-voltage relay 1 has a magnetic drive assembly 3. The magnetic drive assembly 3 includes a core 9 and two yokes, namely a first yoke 5 and a second yoke 7.

[0036] In addition, the magnetic drive assembly may include a coil body 11 having at least one coil turn 13 extending between the two yokes 5 and 7 and surrounding the core 9.

[0037] The coil body 11 is used to generate a magnetic field in the core 9. Since the coil body is known, the coil body 11 will not be discussed further at this point.

[0038] The two yokes 5 and 7, as well as the core 9, are preferably made of metallic materials, especially ferromagnetic materials.

[0039] The two yokes 5 and 7 are connected together by a core 9 and separated by the core 9. Each of the two yokes 5 and 7 preferably extends substantially transversely to the longitudinal axis 15 of the core 9.

[0040] The magnetic drive assembly 3 is used to drive the armature 17 of the high-voltage relay 1. The armature 17 is configured as a rocker arm 19 and includes two arms extending away from each other, namely a first arm 21 and a second arm 23.

[0041] An armature 17, configured as a rocker arm 19, is tiltably mounted on the first yoke 5. The armature 17 can tilt back and forth between a switching position 25 and an open position 27. The load circuit can be closed by the high-voltage relay 1 in the switching position 25 and opened in the open position 27. This will be discussed in further detail below.

[0042] At switching position 25, magnetic circuit 29 can be closed by the second arm. Magnetic circuit 29 in Figure 1 The magnetic circuit 29 is indicated by dashed lines. It preferably extends through the second arm 23, the two yokes 5 and 7, and the core 9.

[0043] When the magnetic circuit 29 is closed, the second arm 23 is firmly against the yokes 5 and 7. The switching position 25 can be reached by applying a coil current in the coil body 11. Then, the magnetic field generated in the core 9 also extends through the two yokes 5 and 7 and pulls the second arm 23 toward the yokes 5 and 7.

[0044] In the switching position 25, the second arm 23 can be arranged parallel to the longitudinal axis 15 of the core 9. The second arm 23 preferably does not include the switch contacts.

[0045] The first arm 21 preferably protrudes above the magnetic drive unit 3. The first arm 21 preferably protrudes above the coil body 11 of the magnetic drive assembly 3. The first arm 21 preferably protrudes beyond the second yoke 7 on the first yoke 5. In the open position 27, the first arm 21 can extend substantially parallel to the longitudinal axis 15 of the core 9.

[0046] The armature 17 is preferably configured to roll along the first yoke 5 at least during movement from the open position 27 to the switched position 25. Alternatively, the armature 17 may be mounted on the suspension, particularly a hinge or a correspondingly configured return spring, to enable tilting movements. The first yoke 5 may be provided with a bearing 31 for the armature 17, at which the cross-section of the first yoke 5 is enlarged. This provides a sufficiently large contact surface for the armature 17.

[0047] In the open position 27, an air gap 33 is preferably present between the armature 17 and the first yoke 5. Instead of the air gap 33, a lubricant may also be present between the armature 17 and the first yoke 5. Since the armature 17 does not directly abut against the first yoke 5 in the open position 27, residual magnetism in the armature 17 can be prevented.

[0048] To facilitate the armature's rolling along the first yoke 5, the armature may be provided with a circular shape, particularly a semi-circular profile, on its side facing the first yoke 5, especially in the region of the inclined axis 35 of the armature 17. Alternatively, the first yoke 5 may be provided with a corresponding profile that facilitates the movement of the armature 17 along the first yoke 5.

[0049] To automatically move the armature 17 from the switching position 25 to the open position 27 when the coil current in the coil body 11 is cut off, the armature 17 can be connected to a spring element 37 that generates a spring force in the direction of the open position 27. To ensure the armature 17 can be safely moved to the switching position 25 when the coil current is turned on, the spring force of the spring element 37 is small enough that it does not obstruct the armature 17.

[0050] The first arm 21 is provided with a switch contact assembly 39. The switch contact assembly 39 is used to close a load circuit 41, at least a portion of which is housed in the high-voltage relay 1. This portion is as follows... Figure 1 As shown. The load circuit 41 can be, in particular, the drive and / or charging circuit 41 of an electric vehicle.

[0051] The high-voltage relay 1 may include two load terminals 43 and 45. Wires for the load circuit 41 to be closed may be connected to load terminals 43 and 45. However, they are not part of the high-voltage relay 1.

[0052] The load terminal 45 is shown by way of example only, with a switch contact 47 connected thereto. The second switch contact 49 is part of the switch contact assembly 39 of the high-voltage relay 1.

[0053] The switch contact 49 of the switch contact assembly 39 is permanently connected to the load terminal 43 in a conductive manner. The permanent conductive connection between the load terminal 43 and the switch contact 49 is preferably established by a flexible conductor 51. The flexible conductor 51 may be, for example, stranded wire or braided cable.

[0054] The two switch contacts 47 and 49 abut against each other in the switching position 25, thereby establishing a conductive connection between the two load terminals 43 and 45 through the electrical conductor 51 and the two switch contacts 47 and 49.

[0055] However, the two switch contacts 47 and 49 are separated from each other in the open position 27, so that no current flows. The switch contact assembly 39 includes an insulating element 53, through which the switch contact 49 of the switch contact assembly 39 is electrically insulated from the rest of the armature 17, especially from the second arm 23. In addition, the switch contact assembly 39 may include at least one contact spring (not shown) to ensure the contact pressure of the switch contact 49 on the switch contact 47 in the switched position 25.

[0056] To prevent the high-voltage relay 1 from unintentionally closing the load circuit 41, or to prevent undesirable movement of the armature 17 from the open position 27 to the switching position 25, the moments of inertia of the two arms 21 and 23 are preferably substantially equal. The term "equal" hereby means that the deviation of the moments of inertia is preferably at most 10%.

[0057] Because the first arm 21 is provided with the switch contact assembly 39, material can be removed from other parts of the arm 21 so that the moment of inertia of the first arm 21 is adapted to the moment of inertia of the second arm 23. Alternatively, the second arm 23 may be loaded with additional mass so that the moment of inertia of the second arm 23 is adapted to the moment of inertia of the first arm 21.

[0058] The same moment of inertia of arms 21 and 23 will cause vibration or shock, causing the two arms 21 and 23 to accelerate equally, so that there is no unwanted switching from one position to another.

[0059] The high-voltage relay 1 may include one or more locking devices 55 configured to prevent the armature 17 from moving away from the first yoke 5 by a predetermined amount. This predetermined amount allows the armature 17 to move sufficiently away from the first yoke 5 to form an air gap 33.

[0060] exist Figure 1 and 2 The locking device 55, indicated only by a small box, can prevent the entire armature 17 from accelerating away from the magnetic drive assembly 3 under strong mechanical impact.

[0061] In its simplest form, the locking device 55 consists of at least one barrier 57 arranged above the armature 17 and preventing movement away from the magnetic drive assembly 3.

[0062] A preferred embodiment of the high-voltage relay 1 according to the present invention will be referred to below. Figures 3 to 8 Describe it.

[0063] The basic structure of high-voltage relay 1 corresponds to reference. Figure 1 and 2 High-voltage relay 1 is described below. For the sake of brevity, only the differences from the previously described high-voltage relay 1 or details not yet mentioned will be described below.

[0064] The high-voltage relay 1 includes a spring element 37 attached to the upper side of a first yoke 5 and a second arm 23. The spring element 37 includes two arms 59 spaced apart from each other along the inclined axis 35 of the armature 17 and each attached to the first yoke 5.

[0065] The total width of the spring element 37 along the inclined axis 35 substantially corresponds to the width of the armature 17 in the same direction. To reach the upper side of the armature 17, the armature is therefore provided with two recesses 61, which are arranged opposite each other along the inclined axis 35 and extend from the outside into the material of the armature 17. Arms 59 of the spring element 37 can extend through these recesses 61 between the upper side of the armature 17 and the first yoke 5.

[0066] A particularly advantageous embodiment in which the first arm 21 is provided with a switch contact assembly 39. Referring below to... Figures 3 to 6 This needs to be discussed.

[0067] The switch contact assembly 39 includes an insulating element 53, which is preferably made of a plastic material. The insulating element 53 is configured to be attached to the first arm 21. It includes a substrate 63 extending parallel to the first arm 21 in the assembled state.

[0068] In the assembled state, the web 67 extends on the lower side 65 of the substrate 63 facing the first arm 21. In the assembled state, the web 67 preferably extends parallel to the longitudinal extension of the first arm 21.

[0069] The web 67 can be received in a clamping receptacle 69 in the first arm 21, which is configured to complement the former. The clamping receptacle 69 extends from one end of the first arm 21 opposite to the second arm 23 into the material of the armature 17 in a direction toward the second arm 23.

[0070] The web 67 can be pushed into the clamping receptacle 69. Due to the retaining structure 71 on the inner wall 73 of the armature 17 that defines the clamping receptacle 69, the web 67 can be held on the first arm 21 in a frictional engagement and / or form fit manner.

[0071] A locking plate 75 extending parallel to the substrate 63 extends at one end of the web 67 disposed opposite to the substrate 63. The locking plate 75 can abut against the lower side of the first arm 21, so that the switch contact assembly 39 is also held on the first arm 21 in a form-fitting manner in a direction that extends transversely to the inclined axis 35 and transversely to the longitudinal extension of the first arm 21.

[0072] A spring retaining structure 77 is disposed on one side of the switch contact assembly 39, which is closer to the tilt axis 35 in the mounted state on the armature 17. The spring retaining structure 77 is preferably integrally formed with the substrate 63.

[0073] Two contact springs 79 are held in the spring retaining structure 77. Each contact spring 79 has a switch contact 49. The contact springs 79 have a generally flat shape and extend parallel to the substrate 63 at least in the open position 27. The contact springs 79 are spaced apart from the substrate 63.

[0074] The contact spring 79 is housed in the spring retaining structure 77. A retaining member 81, such as a corresponding retaining member 81 for each contact spring 79, extends through a channel opening 83 in the contact spring 79 into a receiving portion 85 in the spring retaining structure 77. The retaining member 81 can be clamped in the receiving portion 85. As a result, the contact spring 79 is reliably held in the remainder of the switch contact assembly 39.

[0075] Each contact spring 79 is preferably formed of multiple parts. According to an advantageous embodiment, each spring retaining structure includes an upper spring plate 87 and a lower spring plate 89. Both spring plates 87 and 89 are preferably formed of spring steel. Alternatively, the upper spring plate 87 and lower spring plate 89 of the two contact springs 79 can be formed integrally. This means that the upper spring steel plate, particularly a U-shaped spring steel plate, forms two upper spring plates 87. Correspondingly, the lower spring steel plate, particularly a U-shaped spring steel plate, can form two lower spring plates. A single retaining member 81 is then sufficient to attach the two spring steel plates to the spring retaining structure 77.

[0076] Since the contact spring 79 is designed to move elastically along the contact direction 91, the two spring plates 87 and 89 are preferably not rigidly connected to each other along their entire length. Instead, they are kept movable relative to each other at least at their ends 93, which are positioned opposite the spring retaining structure 77. The contact direction 91 extends perpendicular to the plane of the plates spanned by the spring plates 87 and 89.

[0077] The upper spring plate 87 has a contact plate 95 on its upper side, such that the upper spring plate 87 is arranged between the contact plate 95 and the lower spring plate 89. The contact plate 95 can be securely connected to the upper spring plate 87. However, this is not mandatory.

[0078] The contact plate 95 is preferably made of a material selected based on good conductivity, such as a copper alloy or an aluminum alloy.

[0079] Each of the two contact plates 95 is electrically connected to one of the two flexible electrical conductors 51. For example, each conductor 51 may be soldered, tin-welded, or riveted to the associated contact plate 95.

[0080] Each switch contact 49 of the contact spring 79 is electrically connected to the contact plate 95 of the contact spring 79. In other words, each contact plate 95 establishes an electrical connection between the electrical conductor 51 and the switch contact 49.

[0081] The switch contact 49 extends through the two spring plates 87 and 89 of the contact plate 95 and its contact spring 79. To prevent the switch contact 49 from obstructing movement of the spring plates 87 and 89 relative to each other, the lower spring plate 89 is provided with a receiving portion 97 for the switch contact 49, the net width of which is greater than the diameter of the switch contact 49 in the region of the lower spring plate 89. This allows the switch contact 49 to be movable relative to the lower spring plate 89. Conversely, the switch contact 49 is preferably connected to the upper spring plate 87 in a form-fit manner.

[0082] In the switching position 25, the switch contact assembly 39 preferably moves away from the second arm 21 in the direction of the switch contact 47, such that the switch contact 49 of the switch contact assembly 39 has abutted against the switch contact 47 of the load terminal 45 before reaching the final switching position 25.

[0083] In the final switching position 25, the first arm 21 with the switch contact assembly 39 moves so far in the direction of the switch contact 47 that the contact spring 79 deflects downward, i.e., in the direction toward the substrate 63. As a result, a uniform high contact pressure is ensured between the switch contact 49 and the switch contact 47. The strong contact pressure also prevents very high currents from causing electromagnetic repulsion between the switch contact 49 and the switch contact 47.

[0084] The armature is provided with two protrusions 99, which are arranged opposite each other along the inclined axis 35 and are part of the locking device 55. The housing 101 of the high-voltage relay 1 is provided with a receiving portion 103 for each protrusion 99. Figure 8 Only the lower side 105 of the housing 101 is shown, which has a receiving portion 103 for the protrusion 99.

[0085] The receiving portion 103 is defined by a barrier 57, which is part of the locking device 55. The barrier 57, which prevents the second arm 23 from moving away from the magnetic drive unit 3, is also part of the locking device 55. In this case, the second arm 23 can be considered as a protrusion of the armature 17, which is prevented from any unwanted movement by the barrier 57.

[0086] List of reference numerals

[0087] 1 High-voltage relay

[0088] 3 magnetic drive components

[0089] 5 First yoke

[0090] 7 Second yoke

[0091] 9 core

[0092] 11 coil body

[0093] 13 coil turns

[0094] 15 Longitudinal axis

[0095] 17 armature

[0096] 19 joysticks

[0097] 21 First Arm

[0098] 23 Second Arm

[0099] 25. Switch Position

[0100] 27 Open Location

[0101] 29 magnetic circuits

[0102] 31 bearing

[0103] 33 air gap

[0104] 35° Inclined Axis

[0105] 37 Spring Components

[0106] 39 Switch Contact Assembly

[0107] 41 Load Circuit

[0108] 43 load terminals

[0109] 45 load terminal

[0110] 47 switch contacts

[0111] 49 switch contacts

[0112] 51 Electrical Conductors

[0113] 53 Insulating Components

[0114] 55 locking device

[0115] 57 Barriers

[0116] 59 arms

[0117] 61 recess

[0118] 63 substrate

[0119] 65 lower side

[0120] 67 Web

[0121] 69 Clamping Receiving Section

[0122] 71. Maintaining Structure

[0123] 73 Inner Wall

[0124] 75 locking plate

[0125] 77 Spring Retention Structure

[0126] 79 contact spring

[0127] 81 Retaining Components

[0128] 83-channel opening

[0129] 85 Accommodation

[0130] 87 upper spring plate

[0131] 89 Lower Spring Plate

[0132] 91 Contact direction

[0133] 93 end

[0134] 95 contact plate

[0135] 97 Accommodation Department

[0136] 99 protrusions

[0137] 101 housing

[0138] 103 Reception Department

[0139] 105 Lower side of housing

Claims

1. A high-voltage relay (1) for a drive or charging circuit (41) of an electric vehicle, the high-voltage relay (1) comprising a magnetic drive unit (3) having a first yoke (5) and a second yoke (7) spaced apart from each other, and an armature (17) capable of being driven by the magnetic drive unit (3), wherein, The armature (17) is configured as a rocker arm (19) comprising a first arm (21) and a second arm (23) extending away from the first yoke (5) and tiltable between an open position (27) and a switched position (25) and mounted on the first yoke (5), wherein the first arm (21) is provided with a switch contact assembly (39), and the magnetic circuit (29) comprising the first yoke (5) and the second yoke (7) is closed by the second arm (23) in the switched position (25), wherein the switch contact assembly (39) The device includes at least one switch contact (49) and at least one insulating element (53), the switch contact (49) being insulated from the second arm (23) at least by the insulating element (53), wherein the insulating element (53) includes a substrate (63) extending parallel to the first arm (21) in an assembled state with the first arm (21), the substrate (63) including a lower side (65) facing the first arm (21) in the assembled state, and a web (67) extending on the lower side (65) of the substrate (63).

2. The high-voltage relay (1) according to claim 1, wherein, The first arm (21) protrudes above the magnetic drive unit (3).

3. The high-voltage relay (1) according to claim 1 or 2, wherein, The first arm (21) and the second arm (23) have the same moment of inertia relative to the tilt axis (35) of the rocker arm (19).

4. The high-voltage relay (1) according to claim 1 or 2, wherein, The armature (17) is configured to roll along the first yoke (5) from the open position (27) to the switching position (25).

5. The high-voltage relay (1) according to claim 1, wherein, The at least one switch contact (49) is permanently connected in a conductive manner to the load terminal (43) of the high-voltage relay (1).

6. The high-voltage relay (1) according to claim 5, wherein, The at least one switch contact (49) is connected to the load terminal (43) of the high-voltage relay (1) via a flexible electrical conductor (51).

7. The high-voltage relay (1) according to claim 5 or 6, wherein, The switch contact assembly (39) includes two switch contacts (49), each switch contact (49) being permanently connected to the same load terminal (43) of the high-voltage relay (1).

8. The high-voltage relay (1) according to claim 1 or 2, wherein, The high-voltage relay (1) further includes a locking device (55) which prevents the armature (17) from performing a movement away from the first yoke (5) by more than a predetermined amount.

9. The high-voltage relay (1) according to claim 8, wherein, The high-voltage relay (1) also includes a housing (101), and the locking device (55) includes at least one protrusion (99) on the armature (17) and a barrier (57) on the housing (101), the barrier (57) being configured to abut against the protrusion (99).

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