DE102016011341A1 - High-voltage contactor arrangement for a motor vehicle and method for transferring a high-voltage contactor arrangement between an open and a closed state - Google Patents

Abstract

The invention relates to a high-voltage contactor arrangement (10) for a motor vehicle, wherein the high-voltage contactor arrangement (10) has a coil (12), an armature (14) and a first contact element (18) coupled to the armature (14) High-voltage contactor assembly (10) is adapted to move the armature (14) by energizing the coil (12) to transfer the high-voltage contactor assembly (10) from an open state to a closed state of the high-voltage contactor assembly (10). In this case, the first contact element (18) is coupled only to the one armature (14) via a coupling mechanism (16).

Description

The invention is based on a high-voltage contactor arrangement and a method according to the preamble of the independent claims.

High-voltage contactors for electric vehicles are usually driven by a coil that moves an anchor with directly attached contact bar. The movement of the armature corresponds exactly to the movement of the contact beam and the contact force corresponds to the holding force of the coil-armature combination at a given current minus the force of a return spring to return the armature to its original position and minus levitation. Since the power consumption of the coil can not be arbitrarily increased, the short circuit current capability of the components is limited by levitation forces.

The US 4562418 A describes an electromagnetically operated electrical switch with a movable contact system, which is mounted in a contact carrier. This is connected via rotatable arms with two identical magnetic cores of an actuating magnet. Both magnetic cores move along a line perpendicular to the contact movement, closing towards one another and away from one another when opening. The gradual rotation of the arms changes the gear ratio between the magnet movement and the contact movement, so that the force on the contact carrier increases towards the end of the closing movement.

The disadvantage of this switch is that it is very space-consuming due to the many components, in particular the two magnetic cores, which move towards and away from each other, perpendicular to the contact movement.

The object of the present invention is therefore to provide a high-voltage contactor arrangement for a motor vehicle and a method for transferring a high-voltage contactor arrangement between an open and a closed state, which allow a space-efficient configuration of the high-voltage contactor arrangement and at the same time the highest possible contact force.

This object is achieved by a high-voltage contactor arrangement and a method for transferring a high-voltage contactor arrangement between an open state and a closed state with the features according to the independent claims. Advantageous embodiments of the invention are specified in the dependent claims.

The high-voltage contactor arrangement according to the invention for a motor vehicle has a coil which can be acted upon by current, an armature and a first contact element coupled to the armature. In this case, the high-voltage contactor arrangement is designed to move the armature by energizing the coil in order to transfer the high-voltage contactor arrangement from an open state to a closed state of the high-voltage contactor arrangement. According to the invention, the first contact element is coupled to only one armature via a coupling gear.

The coupling mechanism advantageously makes it possible to provide a translation in order to allow a significant increase in the contact force with the same power consumption of the coil. By increasing the contact force in turn, both a higher continuous current, as well as a significantly increased pulse current carrying capacity can be achieved. Given the strength of a return spring, which may also be provided as part of the high voltage contactor assembly, to return the armature to its home position, a higher breakaway force may be generated, thereby rendering permanent wear of the contactors less likely. With an ideal design, the power consumption of the drive coil can be reduced at the same time. In addition, the invention provides a particularly compact design of a high-voltage contactor arrangement, since only one armature is required for moving the contact element.

In an advantageous embodiment of the invention, the coupling gear is designed such that a provided by the coupling gear ratio between the armature and the first contact element in the open state is greater than in the closed state. As a result, when the contactor is open, a high, with a closed low translation can be achieved. Accordingly, at a constant impressed on the armature power at open contactor, that is in the open state, the translation speed of the contact plate, that is, the first contact element, maximum, while in the closed state, the contact force is maximized.

In a further advantageous embodiment of the invention, the high-voltage contactor arrangement has a second contact element and the high-voltage contactor arrangement is configured such that the first contact element mechanically contacts the second contact element in the closed state and in the opened state the first contact element is spaced from the second contact element. By the invention, it is advantageously possible that by providing the coupling gear a particularly high contact force from first contact element is applied to the second contact element in the closed state.

In a further advantageous embodiment of the invention, the coupling gear in the closed state of the high-voltage contactor arrangement substantially at a dead center. Under a dead center is to be understood here that the connecting joints of a lever mechanism, in this case the coupling gear, and the acting force vectors lie on a common line. In this case, it can essentially be understood that a straight line extending through the joints and the force vectors acting differ from one another by at most a predetermined maximum angle. If, in the closed switching state, similar to a toggle lever tensioner, approximately one dead center is reached, the power consumption of the drive coil can advantageously be simultaneously reduced.

The invention further relates to a method for transferring a high-voltage contactor arrangement for a motor vehicle between an open and a closed state, wherein the high-voltage contactor arrangement comprises a coil, an armature and a first contact element coupled to the armature. In doing so, the high voltage contactor assembly moves the armature by energizing the coil to transition the high voltage contactor assembly from an open state to a closed state of the high voltage contactor assembly. In addition, a movement of the first contact element, which is coupled only to the one anchor via a coupling gear, translated by the coupling gear.

The features, feature combinations and their advantages mentioned for the high-voltage contactor arrangement according to the invention and its embodiments apply in the same way to the method according to the invention. In addition, the subject features mentioned in connection with the high-voltage contactor arrangement according to the invention and its embodiments enable the development of the method according to the invention by further method steps.

Moreover, the invention also relates to a motor vehicle with a high-voltage contactor arrangement according to the invention or one of its embodiments.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the figure description and / or alone in the single figure can be used not only in the respectively indicated combination but also in other combinations or alone, without the frame to leave the invention.

The only Fig. Shows a schematic representation of a high-voltage contactor arrangement 10 in the form of a transmission contactor according to an embodiment of the invention. The high-voltage contactor arrangement 10 has a coil can be acted upon with electricity 12 on, which generates a magnetic field when energized, which is a movement of the magnetic armature 14 the high-voltage contactor arrangement causes. The anchor 14 is here via a coupling device shown here only schematically dashed lines 16 with a first contact element 18 coupled. By a movement of the anchor 14 can the high-voltage contactor arrangement 10 from the open state shown here, in which the first contact element 18 from a second contact element 20 the high-voltage contactor arrangement 10 is spaced apart, be transferred to the closed state, in which the first contact element 18 the second contact element 20 contacted mechanically and in particular with a corresponding contact force against the second contact element 20 is pressed.

Through the coupling gear 16 can now advantageously provide a translation, so that a significantly higher contact force can be achieved in the closed state. In particular, the coupling gear 16 designed such that in the open state, that is, when the contactor is open, a high and in the closed state, a low gear ratio is achieved. Accordingly, at a constant above the anchor 14 impressed power with open contactor, the translation speed of the contact plate, that is, the first contact element 18 , maximum, while in the closed state, the contact force is maximized. In addition, it is particularly advantageous if the coupling gear 16 is configured such that in the closed switching state similar to a toggle lever almost a dead center is reached. In this way, it can be advantageously achieved that at the same time the power consumption of the drive coil can be reduced.

In order to move the armature back to its original position and thereby to transfer the high-voltage contactor arrangement from the closed state back to the open state, a return spring, not shown, may continue to be provided.

As a result, a total of a high-voltage contactor and a method for Transferring the high-voltage contactor arrangement provided between an open and a closed state, by which an increase in the contact force, as well as a resulting higher continuous current, as well as a significantly increased pulse current carrying capacity can be achieved. In addition, a higher breakout force can be generated at a given strength of the return spring, whereby a permanent welding of the contactors is unlikely.

LIST OF REFERENCE NUMBERS

10

High-voltage contactor arrangement

12

Kitchen sink

14

anchor

16

coupling gear

18

First contact element

20

Second contact element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4562418 A [0003]

Claims (5)

High-voltage contactor arrangement ( 10 ) for a motor vehicle, wherein the high-voltage contactor arrangement ( 10 ) a current-charged coil ( 12 ) and an anchor ( 14 ) and one with the anchor ( 14 ) coupled first contact element ( 18 ), wherein the high-voltage contactor arrangement ( 10 ) is adapted to the anchor ( 14 ) by energizing the coil ( 12 ) in order to move the high-voltage contactor arrangement ( 10 ) from an open state to a closed state of the high voltage contactor assembly ( 10 ), characterized in that the first contact element ( 18 ) only with the one anchor ( 14 ) via a coupling gear ( 16 ) is coupled. High-voltage contactor arrangement ( 10 ) according to claim 1, characterized in that the coupling gear ( 16 ) is designed such that a through the coupling gear ( 16 ) provided translation between the anchor ( 14 ) and the first contact element ( 18 ) is greater in the open state than in the closed state. High-voltage contactor arrangement ( 10 ) according to one of the preceding claims, characterized in that the high-voltage contactor arrangement ( 10 ) a second contact element ( 20 ) and the high-voltage contactor arrangement ( 10 ) is configured such that the first contact element ( 18 ) the second contact element ( 20 ) contacted mechanically in the closed state and in the open state, the first contact element ( 18 ) of the second contact element ( 20 ) is spaced. High-voltage contactor arrangement ( 10 ) according to one of the preceding claims, characterized in that the coupling gear ( 16 ) in the closed state of the high-voltage contactor arrangement ( 10 ) substantially has a dead center. Method for transferring a high-voltage contactor arrangement ( 10 ) for a motor vehicle between an open and a closed state, wherein the high-voltage contactor arrangement ( 10 ) a current-charged coil ( 12 ) and an anchor ( 14 ) and one with the anchor ( 14 ) coupled first contact element ( 18 ), wherein the high-voltage contactor arrangement ( 10 ) the anchor ( 14 ) by energizing the coil ( 12 ) is moved to the high-voltage contactor arrangement ( 10 ) from the open state of the high-voltage contactor arrangement ( 10 ) in the closed state of the high-voltage contactor arrangement ( 10 ), characterized in that a movement of the first contact element ( 18 ), which only with the one anchor ( 14 ) via a coupling gear ( 16 ) is coupled, by the coupling gear ( 16 ) is translated.

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