ELECTRICAL CONTACT UNIT

Abstract

A contact unit (1) for establishing an electrically conductive connection comprising a first connecting part (100) with a first electrical contact (121) and a second connecting part (200) with a second electrical contact (221), the first connecting part (100) comprising a first section (101) and a second section (102); the first connecting part (100) being positionable with respect to the second connecting part (200) along a contact-establishing axis (11) in a rest position; the first electrical contact (121) and the second electrical contact (221) being configured to establish, when touching each other, an electrically conductive connection between the first connecting part (100) and the second connecting part (200), which is configured to conduct electrical energy; the contact unit (1) further comprising a positioning unit (131, 110, 210) for a rest position;an actuator (140) that is configured to displace the second section (102) of the first connecting part (100) in the contact-establishment direction (12) with respect to the first section (101).;

Description

ELECTRICAL CONTACT UNIT The application relates to an electrical contact unit, a method for operating the electrical contact unit, and a use of the electrical contact unit. The electrical contact unit can be used, for example, to charge an electric battery accumulator in a vehicle. A necessary condition for implementing an electric battery drive concept, for example for a vehicle, is the availability of a sufficiently large time reserve to charge or recharge the battery by taking advantage of downtime related to operation or use. Due to the limitation of this time reserve, the only way to develop other application scenarios is to improve the battery's fast-charging capability—that is, its ability to charge or recharge quickly—and an associated charging system. The anticipated advancements in battery power density are already leading to increased charging rates. The charging rate is a measure of the ratio of the maximum possible charging current, measured in amperes (A), to the battery's nominal capacity, measured in ampere-hours (Ah). The charging rate is a direct expression of how quickly the battery can be charged. A high charging rate results in a high charging current. Commercially available plug-in receptacles are subject to physical limitations regarding high charging currents, for example, due to the quality of the electrical connection established when the plug-in receptacle contacts touch. To ensure a sufficiently high quality of electrical connection, i.e., low contact resistance, a large contact surface area of ​​the electrical contacts and / or a high contact force between the electrical contacts is required. The latter is subject to a natural limit when handled exclusively by people. Furthermore, increasing the contact surface area for the transmission of very high currents in a standard plug-in receptacle would lead to component dimensions that would prevent human handling. The object of the present invention is to provide an electrical contact unit for establishing an electrical connection, in particular a connection of Recsnn / pznz / B / YiAi electric current, suitable for conducting an electric current, particularly a high electric current, as well as a method for its operation. The objective also includes a possible use of the electric contact unit for charging an electric battery accumulator. This objective is achieved in accordance with the features of the independent claims. Other advantageous embodiments of the invention are indicated in the subordinate claims to the independent claims. The electrical contact unit comprises a first connecting part with a first electrical contact and a second connecting part with a second electrical contact. An electrical contact is a device comprising an electrically conductive material, for example, a metal, an alloy, an electrically conductive organic material, or an electrically conductive carbon variant. An electrical contact is configured to establish an electrically conductive connection with another electrical contact or an electrical conductor upon contact. A contact may be, for example, an integral part of another device, connected to it, or configured as a separate device. Thus, for example, the first contact may be connected to the first connecting part, and the second contact may be connected to the second connecting part.The connection can be made for the first and / or second electrical contact with respectively an elastic pretensioning element, for example a mechanical spring, so that the two contacts can touch with a pretensioning force when one sits against the other. The first connecting part and the second connecting part are movably arranged relative to each other along a contact axis running in a contact direction. It is possible, for example, that the first connecting part is arranged with respect to the contact axis such that the contact axis passes through a point, for example, the center, of the first connecting part. It is also possible, for example, that the second connecting part is arranged with respect to the contact axis such that the contact axis passes through a point, for example, the center, of the second connecting part. The first connecting part comprises a first section and a second section, the second section being movable. Recsnn / pznz / B / YiAi with respect to the first section and the first electrical contact being arranged in the second section. The first connecting part can be placed with respect to the second connecting part along the contact establishing axis in such a way that the first section of the first connecting part is arranged in a rest position with respect to the second connecting part. The first and second electrical contacts are configured to establish, when touched, an electrically conductive connection between them. This means that an electrical conductor on or in the first contact, which is electrically conductively connected to the first contact, can be electrically connected to an electrical conductor on or in the second contact, which is electrically conductively connected to the second contact, by the first contact touching the second contact. The electrical connection is configured to conduct electrical energy, for example, by conducting an electric current. Furthermore, the electrical contact unit includes a positioning unit configured to specify the rest position. This positioning unit allows the first connecting part, specifically the first section of the first connecting part, to be spatially positioned relative to the second connecting part. For example, starting from the rest position, the first and second electrical contacts can be brought into contact. This positioning of the first connecting part relative to the second is advantageous because, starting from the rest position, the first and second electrical contacts can be easily joined or separated with a few simple movements of the first contact. The positioning unit may be configured, for example, with a stop edge on the first connecting part, against which the first connecting part can abut the second connecting part. The positioning unit may also be configured, for example, as a recess in the first connecting part, into which a spring-loaded locking element, fixed to the second connecting part, can fit. This locking element may be, for example, spherical or cylindrical, or in particular, also Recsnn / pznz / B / YiAi a rounded shape, when the first connecting part is in the rest position with respect to the second connecting part. Another possibility, by way of example, occurs when, for example, an optical system with a light sensor and, in this case, a provided light source, emits a signal when the first connecting part is in the rest position with respect to the second connecting part, and this differs from a signal when the first connecting part is not in the rest position with respect to the second connecting part. Another possible implementation, similar to the optical one, involves using a magnet and a Hall sensor. The magnet is positioned in the first connection section and the Hall sensor in the second, or vice versa, in a defined relative position. The Hall sensor detects a magnetic field generated by the magnet and emits a corresponding signal. This signal differs depending on whether the first connection section is in its resting position relative to the second, or whether the first connection section is not in its resting position relative to the second. Similarly, distance sensors, such as eddy current sensors or inductive sensors, can be used to determine position. Another way to specify the rest position is, for example, to use a switch that is only activated in the rest position, or also an image-based system, for example with a camera, in which, with an image evaluation procedure, the position of the first connection part with respect to the second connection part can be determined, and when the first connection part is in the rest position with respect to the second connection part, a corresponding signal is provided. The electrical contact unit further comprises an actuator that is configured, when the first section of the first connecting part is in the rest position, to displace the second section of the first connecting part in the contact-establishing direction with respect to the first section in such a way that the second section of the first connecting part and the second connecting part seat against each other in the contact-establishing direction, with the first electrical contact and the second electrical contact also touching each other. The actuator may comprise two sections, one of which is movable. Recsnn / pznz / B / YiAi with respect to the other, for example, a fixing section and a moving section. For example, this movement can be driven by electrical power, the movement in this direction being provided by an electrically driven motor. In this context, other forms of drive are also conceivable, for example, a drive comprising a hydraulic and / or pneumatic and / or magnetic component and / or also another mechanical component, such as a gear. If the actuator is now fixed, for example, with the fixing section in the first section of the first connecting part, by moving the moving section and, for example, by the moving section abutting the second section of the first connecting part, a movement of the second section relative to the first section can be caused. The actuator can be, for example, a linear actuator that causes a linear movement.Therefore, it is also possible that the fixing section and the moving section can perform a linear movement relative to each other. By touching the first and second contacts, an electrically conductive connection is established between the two, this electrically conductive connection allowing a flow of current between the first connection part and the second connection part. The contact unit may include a locking element. In this respect, it is conceivable that the locking element can move between a locked position and an unlocked position. In the locked position, the locking element may prevent movement of the first section of the first connecting part relative to the second connecting part. It is also conceivable that in the locked position, the locking element may permit movement of the second section of the first connecting part relative to the first section of the first connecting part. Similarly, in the unlocked position, the locking element may permit movement of the first section of the first connecting part relative to the second connecting part.Likewise, in the unlocked position, the locking element can prevent movement of the second section of the first connecting part with respect to the first section of the first connecting part. Recsnn / pznz / B / YiAi In this sense, the interlocking element can offer several advantages. On the one hand, this mechanism allows for the interlocking of the first section of the first connecting part with respect to the second connecting part. Interlocking, in this context, means that when the interlocking element is in the locked position, the first section and the second connecting part cannot move relative to each other. In this case, unintentional removal of the first connecting part from the second connecting part is impossible. Removal during a charging process would be dangerous for users due to the high charging currents that would be expected and could also lead to at least partial destruction of the electrical contact unit or parts of the installation connected to it, for example, by a fire caused by loose, current-carrying contacts. On the other hand, interlocking with the interlocking element allows for the application of contact forces between the first and second connecting parts, particularly between the first and second electrical contacts. Thanks to the interlocking mechanism, for example, very high contact forces would be possible. Furthermore, it is conceivable that in the unlocked position, the movement of the second section relative to the first section could be prevented. This would be advantageous because, for example, in a state where the first connecting part is not in its rest position, an undesirable movement of the second section relative to the first section could be prevented. This makes it possible to keep the sections of the first connecting part tightly joined, particularly when the first connecting part is not in its rest position, and to prevent them from moving away from each other. In one embodiment, the first section of the first connecting part may have an interlocking notch, and the second connecting part may have another notch. In this case, it is conceivable that the interlocking element, when in the interlocked position, engages in the interlocking notch of the first section of the first connecting part and in the notch of the second connecting part. In this case, it is conceivable that the interlocking notch of the first section and the notch of the second connecting part are arranged opposite each other, in particular Recsnn / pznz / B / YiAi when the first connecting part is in the rest position with respect to the second connecting part, and that, for example, the locking element is inserted through the locking notch of the first section into the notch of the second connecting part and remains there, which corresponds to the locking position. It is also conceivable that, in the unlocked position, the locking element or sections thereof are neither in the locking notch of the first section nor in the notch of the second connecting part. Furthermore, the actuator may be connected to the first section of the first connecting part. This allows for particularly suitable movement of the second section of the first connecting part relative to the first section. In particular, when the first section and the actuator are rigidly connected, for example, at the mounting section, the actuator and the first section together form a reference for relative movement of the second section. This movement can be initiated by the movement of the actuator's movement section relative to a surface of the second section of the first connecting part.Due to the movement of the moving section with respect to the surface of the second section of the first connecting part, a force can be exerted on the second section, which can lead to a displacement of the second section of the first connecting part, so that as a result of the displacement the second section of the first connecting part and the second connecting part settle against each other in the direction of establishing contact, with the first electrical contact and the second electrical contact also touching each other. In one embodiment, the actuator is configured to move the locking element from the locked position to the unlocked position and vice versa. For this purpose, the actuator can be kinematically coupled to the locking element, for example, by means of a lever mechanism, a guide rail, or a guide slot. If, for example, the actuator's mounting section is now joined to the first section—in this case, a rigid connection is particularly conceivable—the actuator's moving section can be coupled to the locking element by means of the kinematic coupling. In this case, a force can be transferred to the locking element. Recsnn / pznz / B / YiAi Movement of the actuator's movement section that takes place with respect to the first section of the first connecting part. This may cause a movement of the locking element with respect to the first section of the first connecting part, specifically in such a way that, for example, the locking element is pushed into or at least partially through the locking notch of the first section of the first connecting part and / or into the notch of the second connecting part or is withdrawn in the opposite direction from the notch of the second connecting part and / or from the locking notch. The contact unit may include an electromagnet and an opposing magnetic element. In this respect, the electromagnet, in its active state and when the second section of the first connecting part and the second connecting part are brought together in the contact-making direction, may provide a magnetic attraction force between the second section of the first connecting part and the second connecting part by means of a magnetic field, in conjunction with the opposing magnetic element. This magnetic attraction force may be sufficient to hold the second section of the first connecting part in a position where the first and second electrical contacts are in contact. The electromagnet and the opposing magnetic element thus ensure that an electrical connection is maintained between the first and second electrical contacts.This is also possible when the actuator exerts no force on the second section of the first connecting part. The latter can occur, for example, when the actuator's moving section moves relative to the fixing section in such a way that the moving section exerts no force on the surface of the second section of the first connecting part. Furthermore, a contact force may be established between the first and second electrical contacts by magnetic attraction, which can improve the quality of the electrical connection between them. The opposing magnetic element comprises a magnetic material, for example iron, on which a magnetic field has an attractive effect. The electromagnet is in an active state when an electric current flows through a coil loop of the electromagnet, thus generating a field Recsnn / pznz / B / YiAi magnetic. Therefore, it is possible to put the electromagnet into the active state by activating an electric current flow through the coil loop, for example with a switch. The electromagnet can be put into an inactive state when the electric current flow through the coil loop is deactivated, for example with a switch. The switch for activating or deactivating the electric current flow through the coil loop of the electromagnet can be configured to be controllable, for example, by means of a control device. The contact unit may be configured such that the first electrical contact comprises a first power contact and the second electrical contact comprises a second power contact. The power contact is configured to conduct electrical energy, i.e., to carry it. Generally, the power contact is configured to conduct at least a predetermined amount of electrical energy, i.e., electrical power, per predetermined unit of time. To achieve this, a power contact expansion greater than or equal to a minimum value, depending on the material, is typically selected. The first and second electrical contacts may be configured to carry high electrical power, with a voltage of up to 1500 volts and a current of up to 1600 amperes, preferably up to 1900 amperes, and most preferably up to 3000 amperes. An electrical connection capable of carrying such a current, for example, or in particular without time limit, may be a high-current connection. The electrical connection established by touching the first and second electrical contacts may be a high-current connection. The electrical current may be, for example, direct current (DC). However, alternating current (AC) is also possible. In one embodiment of the contact unit, the first and second electrical contacts may be arranged opposite each other on a surface that is oriented essentially parallel to and at a distance from the contact-establishing axis. Alternatively, the first and second electrical contacts may be arranged opposite each other on a surface that is oriented essentially RPCRnn / rznz / B / YiAi perpendicular to the contact-establishing axis. This demonstrates that the available surfaces of the first and second connecting parts can be efficiently utilized for the arrangement of the electrical contacts. This can be important when, for example, an electrical contact has several sections that must be spaced apart, for instance, for safety reasons. Thanks to the efficient use of available space, the volume of the contact unit can be reduced to the necessary dimensions. In one embodiment, it is conceivable that the first connection portion comprises a first contact of the protective conductor and the second connection portion comprises a second contact of the protective conductor. In this respect, it may be the case that the first contact of the protective conductor is electrically connected to an earth potential. It is also possible that the first contact of the protective conductor establishes an electrical connection between the second contact of the protective conductor and the earth potential when it touches the second contact of the protective conductor. In principle, it is also conceivable that the first and second protective conductors assume interchangeable roles. This means that, for example, the second contact of the protective conductor is electrically connected to the earth potential.And in this case it is also possible that the second contact of the protective conductor establishes an electrical connection from the first contact of the protective conductor to the electrical potential of earth when it touches the first contact of the protective conductor. The first and second contacts of the protective conductor may comprise an electrically conductive material, for example a metal, an alloy, or also an electrically conductive organic material or an electrically conductive carbon variant. The advantageous effect of a protective conductor contact is that it can divert any fault current to the ground potential and thus reduce its harmful effect, for example, on a user of the contact unit or the contact unit or connected parts of the installation. There is a possibility that the second contact of the protective conductor cooperates with a pretensioning element of the protective conductor that is Recsnn / pznz / B / YiAi is configured to provide a contact force between the first and second contacts of the protective conductor when the first contact touches the second contact. The pretensioning element of the protective conductor can be, for example, a mechanical spring connected on one side to the second connecting part and on the other side to the second contact of the protective conductor. It is conceivable that the force associated with the pretensioning element of the protective conductor acts in the direction of contact establishment. Thanks to the contact force between the first and second contacts of the protective conductor, the quality of the electrical connection between the two contacts of the protective conductor can be improved, for example, by reducing the associated contact resistance.Furthermore, this can reduce the risk of an unintentional interruption when the two contacts of the protective conductor are touched and, therefore, an interruption of the electrical connection associated with it. Alternatively, the first contact of the protective conductor may also cooperate with a protective conductor pretensioning element. The explanations for the protective conductor pretensioning element cooperating with the second contact of the protective conductor are analogously valid. In this case, the protective conductor pretensioning element can be fixed, for example, between the second section of the first connection part and the first contact of the protective conductor. In one embodiment, it is conceivable that the first and second contacts of the protective conductor are arranged opposite each other on a surface oriented essentially perpendicular to the contact axis. However, it is also possible that the first and second contacts of the protective conductor are arranged opposite each other on a surface oriented essentially parallel to and at a distance from the contact axis. It is shown again that the available surfaces of the first and second connecting portions can be used efficiently for the arrangement of the electrical contacts. This can be important when, for example, an electrical contact has several sections that need to be spaced apart, for example, by Recsnn / pznz / B / YiAi safety reasons. Thanks to the efficient use of available space, the volume of the contact unit can be limited to a necessary size. This disclosure applies when the first connection part comprises a first pilot control contact and the second connection part comprises a second pilot control contact. In this case, it is possible that when the first and second pilot control contacts touch, an electrically measurable connection is established between them. The first and second pilot control contacts may comprise an electrically conductive material, for example a metal, an alloy, or also an electrically conductive organic material or an electrically conductive carbon variant. In this context, "evaluable" can mean that it can be verified, for example, whether or not an electrical connection exists between the first pilot control contact and the second pilot control contact. This verification can be initiated, monitored, and evaluated by a control unit, for example, by attempting to pass a current through this electrical connection. If this is successful, it can be assumed that the electrical connection exists; if this is unsuccessful, it can be assumed that the electrical connection does not exist. Since the arrangement of the respective pilot control contact in the first or second connection portion is known, the presence or absence of the electrical connection can be used to determine the position of the first connection portion or a section of the first connection portion relative to the second connection portion.This can be used, for example, to determine if the first and second connection parts are aligned with each other in such a way that power can be transmitted, for example, while meeting possible safety requirements. In this context, "evaluable" can also mean that the electrical connection between the first pilot control contact and the second pilot control contact, if present, can be used to transfer electrical signals representing information between the first and second connection points. For example, it is possible to transmit a control signal, a signal containing sensor information, or status information between the two connection points. This information may include, for example, a state of charge, a measured voltage value, a measured current value, an identity, authentication information, pricing information—in short, any information and / or data that Recsnn / pznz / B / YiAi may be of interest for the operation of the contact unit and / or the installations connected to it. To transmit such information, the pilot control contacts may be connected to a control unit, for example, a first and / or a second control unit, or to a sensor or other switching modules, for example, electronic ones. The connection may be implemented via an electrical line, for example, a twisted-pair line. In this respect, it is conceivable that the first and second pilot control contacts may each have one or more electrical contact surfaces on which an electrical connection can be established between them when they touch each other.In this respect, it is also conceivable that the electrical connections between the first and second pilot control contacts may be used in pairs, for example, for the transmission of one or more signals. In this way, the first and second pilot control contacts may also form part of, for example, an electrical communication connection between the control unit connected to the first pilot control contact and the control unit connected to the second pilot control contact. The respective control unit may also be replaced by other electrical or electronic modules from the respective connection point or from the installations connected to it, for example, a vehicle control unit or a charging station control unit.In principle, pilot control contacts can be used advantageously in this sense for control tasks that may arise during the operation of the contact unit. It is also conceivable that part of the functionality of a pilot control contact may be provided by a contact of the protective conductor. For example, an electrically conductive surface of a contact of the protective conductor may form one of the electrical connection surfaces of a pilot control contact or be contained within it. Therefore, it is conceivable that the first contact of the protective conductor provides an electrically conductive surface for the first pilot control contact and the second contact of the protective conductor provides an electrically conductive surface for the second pilot control contact. In such a case, Recsnn / pznz / B / YiAi The electrically conductive surface of the protective conductor contact may be smaller than in the case of a conventional protective conductor contact, which may be intended to provide an earth potential and / or divert a fault current. An electrical connection between the first and second pilot control contacts may also be provided in this case, at least in part, by means of an electrically conductive connection between the first and second protective conductor contacts. It is possible for the first and second pilot control contacts to be positioned between the electromagnet and the opposing magnetic element. Thanks to this defined position, it may be possible, for example, to deduce, by observing when the two pilot control contacts touch (which can be detected, for instance, by detecting an electrical connection between them), the position of at least a section of the first connection part relative to the second connection part. The first pilot control contact may also be provided with an electrically conductive portion of the electromagnet. The second pilot control contact may be provided with an electrically conductive section of the opposing magnetic element. In one embodiment, the second connecting part may comprise a movable contact protection resetter, provided with a pretensioning element. In this respect, it is conceivable that when the first section of the first connecting part is in the rest position, the second section of the first connecting part can be moved in the contact-establishment direction relative to the first section such that the first and second electrical contacts are spaced apart. The contact protection resetter may be made of an insulating material, for example, a non-conductive plastic. The pretensioning element may be a spring, for example, a helical spring or a disc spring. In this case, it is also possible for the pretensioning element to be connected to both the second connecting part and the contact protection resetter.The prestressing element can exert a force on the contact protection resetter so that it can move relative to the second connecting part. In this respect, it is conceivable that, during this movement, the contact protection resetter presses against the second section of the first connecting part and displaces the second section. This displacement can be carried out in such a way that, as... Recsnn / pznz / B / YiAi result of the displacement of the second part, the first electrical contact is distanced from the second electrical contact. In a potential interaction with the electromagnet, it may be advantageous for the electromagnet to be in an inactive state during the movement to separate the first and second electrical contacts. Furthermore, the contact resetter may be displaced between the first and second electrical contacts during this movement, or it may reach a position where, due to the contact resetter's presence, establishing an electrical connection between the first and second contacts becomes impossible. The advantage of such an arrangement is that, for example, when the electromagnet transitions to an inactive state, the electrical connection between the first and second contacts is broken by the distancing mechanism, resulting in electrical isolation between the two contacts. In one embodiment, the second electrical contact may be movable. A kinematic coupling may also be configured between the second electrical contact and the contact protection resetter. In this respect, it is also conceivable that the kinematic coupling transmits a movement from the contact resetter to the second electrical contact, causing the first and second electrical contacts to make contact with each other with a contact force, or to separate the first and second electrical contacts. Thus, it is conceivable that the contact resetter is moved by a movement of the second section of the first connecting part, whereby the second section presses against the contact resetter and displaces it.Thanks to the kinematic coupling, the second electrical contact can move in such a way that it approaches the first electrical contact until it touches it, ultimately establishing a contact force between the first and second electrical contacts. This process can be optimized, for example, by combining the kinematic coupling and the pretensioning element of the contact resetter so that the pretensioning element of the contact resetter can simultaneously act as a pretensioning element for the second electrical contact. When the second section of the first connection part does not press against the contact resetter, for example when the electromagnet is in an inactive state and / or the position of the actuator's movement section allows a Recsnn / pznz / B / YiAi Movement of the second section of the first connecting part: the contact resetter can be moved by the force exerted by the pre-tensioning element of the contact resetter, such that the second section of the first connecting part is moved by the contact resetter by pressure, thus spatially separating the first electrical contact from the second electrical contact. At the same time, the second electrical contact itself can also be moved by the kinematic coupling, so that the spatial distance between the first and second electrical contacts also increases. It is conceivable that the pretensioning element of the protective conductor and the pretensioning element of the contact protection resetter are configured such that, when an electrical connection is established between the first and second connection parts, the contact-making order is provided as follows: protective conductor contacts, first and second contacts, and control pilot contacts. When the electrical connection between the first and second connection parts is broken, the order of control pilot contacts, first and second contacts, and protective conductor contacts may be maintained. In one embodiment, the first connecting part may be a male plug and the second connecting part a female plug. Alternatively, the first connecting part may be a female plug and the second connecting part a male plug. In this context, the female plug may guide the male plug along the contact axis. This guidance, which is equivalent to a restriction of the possible degrees of freedom in the movement between the male and female plugs, simplifies the use of the contact unit, since no further precautions are required for movement along the degrees of freedom not restricted by the restriction. It is also possible that the female socket has a movable cover. This can serve to protect the electrical contact of the female socket from environmental influences. Environmental influences can be, for example, precipitation such as rain, dew, or snow, or also dust or other particles that may be present, particularly in production facilities. However, there may be other relevant environmental influences, such as gases or, Recsnn / pznz / B / YiAi, for example, salts that may be present in sea air. Due to a hollow space, which typically defines a female socket and generally at least partially surrounds it, it may be important for proper operation to protect the female socket from, for example, deposits resulting from environmental influences or contact with them, for example, by covering it with a cover. The cover may be, for example, hinged or may also be attached to the female socket in a movable manner. The movement of the cover may be carried out, for example, by another actuator, for example, an electric motor. However, in principle, it is also possible for the cover to be equipped with a pretensioning element and pressed into an open position, for example, by pressure exerted by a user action, and moved back into a closed position by the force exerted by the pretensioning element.However, the cover can also be made as a lid, which can be arranged, for example, manually. In principle, it is also conceivable that the hollow space of the female socket is designed to be flushed with a gas. In this respect, it may happen, for example, that when the hollow space is essentially sealed by the cover, an overpressure is generated within the hollow space compared to the ambient pressure. In one embodiment, the first connecting part may be attached to a clamping device configured to provide an interface for positioning the first connecting part relative to the second connecting part. This positioning may be, for example, manual. It is also conceivable that the positioning may be mechanical, mechanically assisted, or assisted by a mechanical device. The clamping device may, for example, have a handle, such as a bar. The clamping device may also be spaced from the first connecting part, for example, by a spacer. It is also possible that the clamping device may be arranged at least partially circumferentially around the first connecting part.For example, the gripping device can be held with one hand, but also with two. The gripping device may also have an ergonomic structure, for example, notches arranged in a wavy pattern. Recsnn / pznz / B / YiAi can reproduce the fingerprint of a hand. The clamping device can also be made by means of a notch in the first connecting part. Another possibility is that the clamping device is made as a surface, for example with threaded holes, to which a machine or mechanical device can be attached, for example by means of a threaded connection. In one embodiment, it is conceivable that the first and / or second connecting part each have a clamping device, for example, in one of the embodiments described above, or, for example, as a quick connector, with which the first and second connecting part can be mechanically, or at least mechanically assisted, and / or mechanically assisted relative to each other. In this case, it is also possible that the first connecting part can be mechanically, or at least mechanically assisted, and / or mechanically assisted, brought to the rest position. For this purpose, the first connecting part can be connected, for example, to a support arm, using the clamping device. In this respect, the support arm may perform both translational and rotary movements, for example, on three, four, five, or more axes. It is also conceivable that the support arm may be moved by means of a drive motor. The support arm may also be configured, for example, as a robotic arm. To establish a connection between the support arm and the first connecting part, the first connecting part may include a clamping device, such as a flange surface, to which the support arm can be attached, for example, by screwing or insertion. The first connecting part may also have a recess as a clamping device, into which a suitable counterpiece of the support arm can be fitted. A connection between the support arm and the first connecting part can also be established using a ratchet or bayonet lock as a fastening device. It is also conceivable that the support arm incorporates a gripping and holding mechanism and guides the first connecting part, for example, into the handle. To control the mechanical and / or mechanically assisted orientation of the first and second connecting parts relative to each other, it is possible to provide a control Recsnn / pznz / B / YiAi positioning control that regulates the movement of the support arm, for example, by supplying suitable signals to a motor that drives the movement of the support arm. It is also conceivable that the positioning control receives a signal from a sensor indicating the orientation of the first connection part relative to the second connection part. Such a sensor could be, for example, an optical sensor, such as a camera or a combination of a light source and a light sensor, or a distance sensor, such as an eddy current sensor or a Hall sensor with an opposing magnet, or a pressure-wave or radio-wave-based locating device.It is also conceivable that the first and / or second connecting part may be provided with a spatially limited mark, the mark being distinguishable from its surroundings, for example by color, structure, surface, material or a combination thereof, or being made, for example, as a projection, edge or notch or a combination thereof. Furthermore, it is possible that the first connection part, for example, the electrical conductor arranged in the first connection part, is electrically connected to a source of electrical energy, and that the second connection part, for example, the electrical conductor arranged in the second connection part, is electrically connected to a receiver of electrical energy, for example, a rechargeable electrical energy storage device. Alternatively, it is possible that the first connection part, for example, the electrical conductor arranged in the first connection part, is electrically connected to the receiver of electrical energy, for example, a rechargeable electrical energy storage device, and that the second connection part, for example, the electrical conductor arranged in the second connection part, is electrically connected to a source of electrical energy.The source of electrical energy can be, for example, the electrical grid, which in turn may contain another source of electrical energy, such as a power plant. However, the energy source can also be an energy storage device, such as a battery or a rechargeable energy storage device that can be recharged. For example, it could be a lithium-ion battery or a supercapacitor, or even a carbon-based energy storage device, such as one based on graphene. The rechargeable electrical energy storage device can be, for example... Recsnn / pznz / B / YiAi For example, a battery or rechargeable energy storage device, which can also be recharged. For example, it could be a lithium-ion battery or a supercapacitor (supercap) or also a carbon-based energy storage device, for example, graphene-based. By touching the first electrical contact and the second electrical contact, so that an electrical connection is established between the first and second electrical contacts, an electrical connection can be established between the source of electrical energy and the receiver of electrical energy, for example, the rechargeable energy storage device, through the electrical conductor in the first connecting part, the first electrical contact, the second electrical contact, and the electrical conductor in the second connecting part, so that electrical energy can be transported from the energy source to the energy receiver.It is also possible to conduct electrical energy in the form of current from the energy storage device, which in this case serves as the energy source, to the grid, which in this case represents an energy receiver, via the contact unit. This could be done, for example, to stabilize the electrical grid or a portion thereof, and / or more generally, to supply power from the energy storage device to the grid. For this purpose, the grid can be electrically connected, for example, to the first electrical contact, and the energy storage device to the second electrical contact. Alternatively, the grid could be electrically connected to the second electrical contact, and the energy storage device to the first electrical contact. In one embodiment, the first and / or second connection part may be temperature-conditioned. In this respect, the temperature conditioning may set the temperature of the first and / or second connection part to below 120 °C, preferably 90 °C, and most preferably 60 °C. The temperature of the first and / or second connection point can be detected with a temperature sensor. For example, the temperature sensor can be placed on or near the first and / or second electrical contact. Temperature conditioning is possible, for example, with a flow Recsnn / pznz / B / YiAi of air, which can absorb the heat generated in the contact unit and dissipate it into the surrounding environment. The airflow can be supplied, for example, by a fan or a compressor, which blows air into the first and / or second connection part, for example, through air inlet openings provided for this purpose. It is also conceivable that the airflow can be supplied from a reservoir, for example, a pressure vessel, with pressure applied to the air inlet openings, so that the airflow can enter the air inlet openings. Furthermore, it is possible that, starting from the air inlet openings, the airflow is directed into the contact unit by means of an air duct within the contact unit, for example, in the first connection part. It is also possible that the airflow is distributed within the contact unit using an air distributor.In this respect, it can be advantageous for the airflow to reach the first and / or second electrical contacts in a uniformly distributed manner. Temperature conditioning can be further improved if the airflow itself is conditioned to a predetermined temperature, for example, 20°C, or to an ambient temperature that can be detected by another temperature sensor in the vicinity of the contact unit. However, it is also possible to dissipate the thermal energy from the contact unit, for example, with the aid of a refrigerant flowing in a refrigerant channel arranged around the first and / or second electrical contacts. Water, for example, can be used as the refrigerant.To determine the amount of air and / or refrigerant to be supplied for cooling over a period of time and adjust it accordingly, it may be necessary to evaluate a signal from a sensor, for example, a temperature sensor. One advantage of temperature conditioning, particularly cooling the contact unit, is that it allows for keeping the temperature-dependent ohmic resistance, for example, in the first and / or second electrical contact or in an electrical conductor, below a predetermined maximum value. Since ohmic resistance is associated with electrical power loss generated within the contact unit, the power loss and associated heat generation in the contact unit can therefore also be limited. Furthermore, it may be the case that the materials used in the contact unit, for example, when used in a Recsnn / pznz / B / YiAi insulation systems should only be used at temperatures within a predetermined range to ensure a predetermined insulation function and service life. Temperature conditioning can also be used to maintain such a temperature range. In one embodiment, the contact unit may include a control unit. The control unit may emit a control signal to establish and / or break an electrical connection between the first and second connection parts. Such a control signal may refer, for example, to the actuator, for instance, to move the moving section relative to the clamping section. In this respect, the control unit may process a signal indicating the position of the moving section relative to the clamping section. Such a signal may be provided, for example, by a sensor, such as an optical sensor, a magnetic sensor, an eddy current sensor, or a limit switch, which may perform a sensing function.It is also possible that the control unit processes a signal indicating whether the first connection part is in the rest position with respect to the second connection part. Furthermore, a control signal relating to the electromagnet is also conceivable, for example, to switch the electromagnet into an active or inactive state. This can be done, for example, by switching on or off a power source that provides the electrical current for the electromagnet's coil. The control signal relating to the electromagnet can also be generated, for example, based on a signal indicating the position of the moving part relative to the fixed part. However, it can also depend on whether, for example, the first and second pilot control contacts are touching each other. The control unit can be configured, for example, as a microcontroller with a processing unit and memory, and also includes a suitable interface for receiving and sending signals, such as the control and / or sensor signals mentioned earlier. The function of the control unit can be determined, for example, by a control program stored in memory. Furthermore, it is also conceivable, for example, that a function of the control unit is Recsnn / pznz / B / YiAi implemented with the help of an FPGA (Field Programmable Gate Array), with the possibility of storing an FPGA configuration that determines the functionality in a memory connected to it. The control unit can also monitor the state of charge. For example, if a battery being charged is fully charged, the current flow is cut off and the electrical connection between the first and second terminals is severed. Other management functions, such as recording time and costs, data collection, identity verification, communication (e.g., with a central facility control system or server), alarm functions, fault detection, temperature monitoring, and cooling control, can also be performed by the control unit. This may require the installation of additional sensors on the contact unit, such as a temperature and / or time sensor, and the signals generated by these sensors must be received and processed by the control unit. Furthermore, the control unit may provide functionality that controls an optional user interface, enabling the user to perform command actions. Such a user interface may include, for example, an indicator element, such as a display or light-emitting diode, and / or switches, pushbuttons or keys, a touch panel, or other conceivable input devices with which the user can operate the control unit. In one embodiment, the contact unit may have reverse polarity protection. Reverse polarity protection means that, by means of a design feature and / or a testing procedure, the first and second connecting parts are prevented from being oriented in any way with respect to each other, particularly when the first and second electrical contacts touch each other and / or are directly adjacent to one another, for example, during the establishment of a conductive connection between the first and second electrical contacts and / or during the disconnection of such a connection. Recsnn / pznz / B / YiAi Reverse polarity protection is designed to limit the number of possible electrical connection configurations of the first electrical contact to the second electrical contact, and / or the first contact of the protective conductor to the second contact of the protective conductor, and / or the first pilot control contact to the second pilot control contact, to a predetermined number—for example, to exactly one possible connection configuration or, for example, to exactly two possible connection configurations. Reverse polarity protection has the advantage, in this respect, that, for example, in the case of electrical connections using direct current and / or direct voltage, unforeseen electrical connections are prevented, which could lead to a fault current and / or damage to the contact unit and / or connected components, or even injury to the user. In one embodiment, it is conceivable to have reverse polarization protection of this type in which, for example, the first connecting part has at least in one section an outer shape that is essentially complementary to a complementary outer shape of at least one section of the second connecting part, the shape and the complementary shape being configured to fit one another and to predetermine the arrangement of the first connecting part with respect to the second connecting part by fitting one another. Another possibility for implementing reverse polarity protection is, for example, to arrange the first and second electrical contacts in the first and second connection sections, respectively, such that these contacts can only touch each other, and only in the predetermined connection configuration, when the first and second connection sections are aligned with each other in a corresponding manner. This could be achieved, for example, by selecting an asymmetrical arrangement of the respective contacts with respect to the contact-making axis. This type of contact arrangement can also be provided analogously, additionally, or alternatively, using the first and second contacts of the protective conductor and / or the first and second pilot control contacts. In this case, for example, there is the possibility that when the first contact of the protective conductor and the second contact of the The protective conductor is checked, for example, using a control program stored in the control unit, to determine if electrical connections exist between the first and second contacts of the protective conductor and / or what those connections are, for example, by detecting and evaluating any potential current flow between them. This check can be performed similarly, additionally, or alternatively, using the first and second electrical contacts and / or the first and second pilot control contacts. Based on the test results, a decision can be made, for example, as to whether or not energy can be transmitted through the contact unit. One use of the contact unit is possible, for example, when recharging a battery accumulator of a battery-powered electrically driven vehicle. A procedure for operating a contact unit is also disclosed. This procedure may also refer to establishing a high-current connection for recharging a battery accumulator in a battery-electrically powered vehicle. The procedure may be carried out, for example, using a contact unit described above. The characteristics described with reference to the contact unit are also applicable to the procedure, just as the characteristics of the procedure are also applicable to the contact unit. The disclosed procedure comprises the following stages: - providing a first connecting part with a first electrical contact and a second connecting part with a second electrical contact, such that the first connecting part and the second connecting part are movable relative to each other along a contact-making axis running in a contact-making direction, the first connecting part being able to be positioned relative to the second connecting part along the contact-making axis such that a first section of the first connecting part is arranged in a rest position relative to the second connecting part; - position a first section of the first connection part in the rest position with respect to the second connection part; Recsnn / pznz / B / YiAi - displace a second section of the first connecting part in the direction of establishing contact with respect to the first section, so that the second section of the first connecting part and the second connecting part sit against each other in the direction of establishing contact, in addition to the first electrical contact and the second electrical contact touching each other. The disclosed procedure may also include one or more of the following stages: - move an interlocking element to an interlocking position; - move the locking element to an unlocked position; - activate an electromagnet; - to deactivate an electromagnet. In addition, the disclosed procedure may also include one or more of the following stages: - move the second electrical contact by moving a contact protection resetter kinematically coupled to it; - provide a contact force between the first and second electrical contact; - open a cover - close a cover. The procedure may also include one or more of the following stages: - connect the first part of the connection to a power source; - connect the second part of the connection to a power source; - connect the first part of the connection to an energy storage device; - Connect the second part of the connection to an energy storage device. Other possible stages of the procedure include: - condition the temperature of the contact unit; - provide a control signal; - process a sensor signal; - provide a communication signal; - processing a communication signal. One possible application of the electrical contact unit is to establish a conductive electrical connection, or simply an electrical connection. This electrical connection can then be used to conduct an electric current. Recsnn / pznz / B / YiAi The electrical connection can be a high current connection, the high current connection understanding the ability to conduct a high electrical current. The electrical contact unit can be used to establish an electrical connection between a power source and a battery, or simply a battery accumulator. The battery accumulator is designed to store electrical energy. The battery accumulator can be rechargeable. The battery accumulator can provide power for a vehicle. The vehicle can be battery-powered. This means that the vehicle or its components can operate using the energy supplied by the battery accumulator. The term "vehicle" encompasses motor-driven means of transport for movement on land, water, and air, as well as in space, such as automobiles, ships, airplanes, and spacecraft. It can also include, for example, motor-driven installations designed to perform movement, such as those found in industrial enterprises, including crane installations, conveyor belts, and other industrial transport systems. In this respect, a vehicle may be operated with human interaction, but also without human interaction (i.e., autonomously), or controlled by a control system. The electrical contact unit can also be used in installations not primarily intended for mobility, for example, in an electrical energy storage device, which may be designed for both stationary and mobile operation. An application without an energy storage device is also conceivable, and in such an application, establishing a connection between an electrical energy source and an electrical energy receiver may be important. However, the electrical contact unit is preferred for establishing a high-current connection. This high-current connection can be used, for example, to recharge a battery in a battery-powered vehicle. The following examples will be shown and explained with the help of figures. In this regard, it shows: Figure 1: A schematic representation of the contact unit; Figures 2a to 2d: respectively a schematic representation of a Recsnn / pznz / B / YiAi first connection part configured as a male plug; Figures 3a to 3f: respectively a schematic representation of a second connection part configured as a female plug; Figures 4a to 4d: respectively a schematic representation of the first and second connecting parts in different positions relative to each other; Figures 5a to 5d: respectively a schematic representation of the first and second connecting parts in different positions relative to each other; Figures 6a to 6b: respectively a schematic representation of a tensor element; Figures 6c to 6d: respectively a schematic representation of a kinematic coupling between the tension element and a locking element; Figures 7a to 7b: respectively a schematic representation of a locking and unlocking of a second section of the first connecting part; Figures 8a to 8c: respectively a schematic representation of the first and second connection parts during the establishment of an electrical connection between the first and second connection parts; Figures 9a to 9b: respectively a schematic representation of a kinematic coupling between a contact resetter and a second electrical contact. Figures 10a to 10c: respectively a schematic representation of an air duct for temperature conditioning; Figures 11a to 11b: respectively a schematic representation of an alternative air duct for temperature conditioning; Figures 12a to 12b: respectively a schematic representation of the alternative air conduit for temperature conditioning with the first and second connection parts. The elements that are repeated in the figures are provided with identical references and are partially omitted, particularly when these elements are not referenced in relation to a particular drawing. Furthermore, it is understood that the embodiment examples shown only represent possible ways of implementing the disclosed inventive ideas and are not intended to be limiting. All figures include only Recsnn / pznz / B / YiAi schematic representations, although this is not always explicitly stated. In this respect, details not mentioned within the explanation may be omitted from individual figures. Furthermore, the figures only include representations where the first connection part is assumed to be a male plug and the second connection part a female plug. However, the principles shown can also be applied analogously to the case where the first connection part is a female plug and the second connection part is a male plug. Figure 1 shows a contact unit 1. It comprises a first connecting part 100 and a second connecting part 200. The two connecting parts 100, 200 are arranged and oriented on a contact axis 11 such that they are displaceable relative to each other in a contact direction 12 that runs in the direction of the contact axis 11. In Figure 1, the first connecting part 100 is arranged with respect to the contact axis 11 such that the contact axis 11 passes through a center point of the first connecting part 100. The second connecting part 200 is also arranged with respect to the contact axis 11 such that the contact axis 11 passes through a center point of the second connecting part 200. Furthermore, Figure 1 shows a Cartesian coordinate system 13, which has coordinate axes in the X, Y, and Z directions, respectively, with the Y axis parallel to the contact axis 11. During operation of the contact unit 1, the first connecting part 100 can be at least partially inserted into the second connecting part 200, with the insertion direction corresponding to the positive Y direction. Separation of the first connecting part 100 and the second connecting part 200 occurs correspondingly by displacement of the first connecting part 100 relative to the second connecting part 200 in the negative Y direction.The displacement of the first connection part 100 with respect to the second connection part 200 can take place by a movement of the first connection part 100 and / or the second connection part 200. Recsnn / pznz / B / YiAi Figure 1 also shows a control unit 300. The control unit 300 can be, for example, a microcontroller, a programmable logic controller, a computer, an FPGA, or an electronic circuit. The control unit 300 can be configured as a single control unit. However, it is also possible for the control unit 300 to comprise, for example, several control units, such as a first control unit 301 and a second control unit 302, as shown in Figure 1. The first control unit 301 and the second control unit 302 can be connected so that they communicate with each other, for example, electrically. In the example shown in Figure 1, the first control unit 301 can have a communication connection with the first connection part 100. For this purpose, it can be located outside or inside the first connection part 100.The first control unit 301 can be configured, for example, as a control unit for a charging station. In the example shown in Figure 1, the second control unit 302 can have a communication connection with the second connection part 200. For this purpose, it can be located outside or inside the second connection part 200. The second control unit 302 can be configured, for example, as a vehicle control unit. Communication between the first control unit 301 and the second control unit 302 can be established, for example, by means of an electrical connection comprising a first pilot control contact 123 and a second pilot control contact 213. It is also possible for the first control unit 301 and the second control unit 302 to communicate with each other via a radio link. Furthermore, it is conceivable that the first and second control units 301 and 302 can perform tasks independently of each other. The control unit 300 can be used to send control signals to the first connection part 100 and / or to the second connection part 200, for example, to control an actuator drive 141 (not shown in Figure 1), or also to receive signals, for example, a switching signal from a control element 126 (not shown in Figure 1), which can be a switch, a push button, or a touch panel, or a sensor signal, for example, from a limit switch, such as a micro-push button, a Recsnn / pznz / B / YiAi Hall sensor or a distance sensor. Other signals may refer to the position of the actuator drive 141, but also to a temperature, for example, in the vicinity of contact unit 1 and / or within contact unit 1. The signals may be transmitted using the pilot control contacts 123, 223 (not shown in Figure 1). The control unit 300 may provide a user interface through which contact unit 1 can be operated. It may also be used to control and monitor a charging process, for example, by checking whether operating limits, such as temperature or current intensity, are being met. The operation of contact unit 1 may be automated by the control unit, for example, by running a procedure to operate contact unit 1 as a program in the control unit 300.Such a procedure may comprise, for example, one or more steps, such as evaluating a sensor signal, providing a control signal for actuating actuator 141, activating an electromagnet 124, deactivating the electromagnet 124, connecting the first connection part 100 to a power source, connecting the second connection part 200 to a power source, connecting the first connection part 100 to an energy storage device, connecting the second connection part 200 to an energy storage device, opening a cover, closing a cover, providing a communication signal, and processing a communication signal. The control unit 300 may also have a communication interface. It is conceivable that the control unit 300 receives data and / or control signals via this communication interface. In this way, the control unit 300 can also be controlled remotely.It is also possible to change the program of the 300 control unit via the communication interface. Figures 2a to 2d respectively show a schematic representation of a first connection part 100 configured as a male plug 100. The first connection part 100 of Figure 2a has a first section 101 and a second section 102. In particular, this representation shows a surface 102a of the second section 102, which represents a front surface 102a of the second section 102 and is oriented essentially perpendicular to a contact-establishing direction 12. On this front surface 102a are arranged first conductor contacts of Recsnn / pznz / B / YiAi protection 122, an electromagnet 124, and the first pilot control contact 123. The front surface 102a has concavities 130, from which the first contacts of the protective conductor 122 protrude, for example, perpendicular to the front surface 102a. In this example, the first contacts of the protective conductor 122 are essentially cylindrical. Also visible are the protrusions 132, behind which a first electrical contact 121 is arranged (covered by the protrusions 132 in this figure). This makes it more difficult to directly touch the first electrical contact 121. The second section 102 is configured such that on surfaces other than the front surface 102a it is at least partially enveloped by the first section 101, is movable within the first section 101, and is further formed such that the first section 101 can guide the second section 102 in a movement in the contact-establishment direction 12. In Figure 2a, a clamping device 190 can also be seen, which is fixed with the help of several spacers 191 in the first section 101. The clamping device 190 has a bar-like shape in sections and is configured at least partially circumferentially around the first section 101. This configuration is advantageous because a bar-shaped form can be grasped by a human hand, thus enabling easy handling of the first connecting part 100. The ability to grasp the clamping device 190 by hand is facilitated because, thanks to the use of spacers 191, which establish an essentially rigid connection between the clamping device 190 and the first section 101, an intermediate space is created between the first section 101 and the clamping device 190. Furthermore, it is also clear that in other embodiments, a clamping device 190 can be implemented differently, for example, by means of a concavity in the first section 101. Figure 2b shows the first connecting part 100 of Figure 2a in a side view. The contact-establishing axis 11, which runs along the contact-establishing direction 12, can be seen. Also shown are a stop edge 131, a locking element 111, and a locking notch 110. The stop edge 131, the locking element 111, the locking notch 111a, and the locking notch The immobilization devices 110 are configured to predetermine the positioning of the first connecting part 100 with respect to the second connecting part 200. The stop edge 131 can also serve as a sealing element. It can be made, for example, of a watertight material, such as rubber. In this figure, the second section 102 is at least partially enclosed by the first section 101 such that the front surface 102a is outside the area enclosed by the first section 101. In this respect, the second section 102 is positioned in this representation so that the first electrical contact 121, which is located in the second section 102, is covered by the first section 101, making it more difficult for a potential user to touch the first electrical contact 121.In the embodiment shown, the first contacts of the protective conductor 122 do not protrude from the front surface 102a of the second section 102. Figure 2c shows an isometric representation of the first connecting part 100 of Figures 2a and 2b. In this respect, several side surfaces 101a of the first section 101 are visible, and it can be seen that on each of the side surfaces 101a, respectively, there is arranged the locking notch 111a for a locking element 111, as well as a locking notch 110. In this representation, the second section 102 is in a locked position, preventing movement of the second section 102 relative to the first section 101. In the locked position, for example, movement of the first connecting part 100 is possible without the first section 101 and the second section 102 unintentionally moving relative to each other, thus creating, for example, a situation where the first section 101 does not cover the first electrical contact 121. Figure 2d shows the isometric representation of the first connecting part 100 of Figure 2c in a situation where the second section 102 is not in the locked position, but in the unlocked position. The second section 102 protrudes from the first section 101 such that the first electrical contact 121 is not covered by the first section 101. In this respect, the first electrical contact 121 is arranged on each of the lateral surfaces 102b of the second section 102. The first electrical contact 121 has an extended shape, in this case, but not necessarily, with a Recsnn / pznz / B / YiAi rectangular base surface, as well as button-shaped projections, the button-shaped projections having a convex shape at one end, for example, a hemisphere. This convexity allows for a contact-establishment process in which smoother sliding is possible compared to a more angular shape. Furthermore, the quality of an electrical connection that can be established with this contact is more predictable and reproducible. For establishing an electrical connection, the first electrical contact 121 comprises an electrically conductive material, for example, copper, aluminum, a carbon-based electrical conductor, a metal alloy, or the like. In Figure 2d, the locking element 111 is shown in its locked position. It can also be seen that the locking element 111 is arranged on each of the side surfaces 101a of the first section 101 or on the side surfaces 102b of the second section 102. This enables uniform locking and, consequently, a uniform distribution of force on the first connecting part 100, which may be necessary to maintain the first connecting part 100 in a specific position. In addition to the figures above, Figure 2d shows a control element 126, for example, a switch or push button, which can be used to perform control actions, such as initiating an electrical connection between the first connecting part 100 and the second connecting part 200. This control element 126 can be fixed, for example, to the clamping device 190.Alternatively or simultaneously, the control element 126 can also be fixed in another suitable position in the first and / or second connection part 100, 200 or also in a control unit not shown here or in a control unit, with which automated control and / or switching actions may also be possible. Figures 3a to 3f show a schematic representation of a second connection part 200 configured as a female socket 200. The second connection part 200 may be configured to cooperate with the first connection part 100 in Figures 2a to 2d. The first connection part 100 and the second connection part 200 may be configured in this case so that they have at least partially complementary shapes to each other, and, for example, the Recsnn / pznz / B / YiAi The first connecting part 100 can be displaced, at least partially, into or outside a hollow space 203 defined by the second connecting part 200. In this case, the first connecting part 100 may be guided during displacement by an edge of the second connecting part 200. Figure 3a shows the second connecting part 200 in a front view. A front surface 201a, on which a sealing element 204 is arranged, is visible. In addition, four side surfaces 202 of the second connecting part 200 are shown, as well as an inner boundary comprising surfaces of a contact resetter 240 and an opposing magnetic element 224. The front surface 201a and the inner boundary are oriented essentially perpendicular to the contact-establishing axis 11 (not shown in Figure 3a), which runs in the contact-establishing direction 12 (not shown in Figure 3a). The side surfaces 202 are arranged so that they run essentially parallel to the contact-establishing axis 11.In an alternative embodiment, an arrangement of the side surfaces 202 is also conceivable in which the opposite side surfaces 202 are not oriented parallel to each other, but rather run, for example, conically towards one another. The side surfaces 101a of the first section 101 of the first connecting part 100 and / or the side surfaces 102b of the second section 102 of the first connecting part 100 may be oriented essentially parallel to the side surfaces 202 of the second connecting part. This allows for cooperation between the first and second connecting parts 100, 200. The plane of the front surface 201a, the inner boundary, and the side surfaces 202 of the second connecting part define the hollow space 203 of the second connecting part. In the form shown, this hollow space 203 has an essentially parallelepiped shape, which can also be considered a cylindrical shape with a square or, more generally, rectangular base. It is also conceivable that the hollow space 203 has a cylindrical shape in which the base surface is not rectangular. For example, a base surface with three, five, or more corners is conceivable, which may also be rounded or chamfered, or, for example, a Recsnn / pznz / B / YiAi non-linear delimitation of the base surface. In this case, the geometric shape of the lateral surfaces 202 of the second connecting part 200 must be adapted to the base surface in such a way as to create a corresponding cylindrical shape. Beyond the cylindrical shape, a narrowing, for example conical, of the hollow space 203 along the contact axis 11 is also conceivable. The first connecting part 100 may in this case also have a shape that differs from the shape shown in Figures 2a to 2d in that its surfaces 101a, 102b are adapted in terms of dimension and orientation to the hollow space 203 of the second connecting part such that the first connecting part 100 can be inserted at least partially into the hollow space 203 of the second connecting part 200. Furthermore, Figure 3a shows protective conductor contacts 222 arranged on the inner boundary, positioned on a projection 230. The projections 230 shown can be oriented such that they are opposite the notches 130 of the first connection part 100 when the first connection part 100 is inserted into the hollow space 203 of the second connection part 200, and can be fitted into them. The notches 130 of the first connection part 100 and the projections 230 of the second connection part 200 can be complementary to each other. Additionally, Figure 2a shows an opposing magnetic element 224, here in the form of an opposing magnetic plate 224, made of a magnetic or magnetizable material, such as iron.The opposing magnetic plate 224 is in the form of a circular cylinder, although another cylindrical base surface is also possible, such as a polygonal shape or a base surface of a different configuration. The second pilot control contact may be located on the opposing magnetic element. Additionally, locking elements 210, located on the lateral surfaces 202, are shown. Figure 3b shows the second connection part of Figure 3a in a side view. Figure 3b includes a representation of the second electrical contact 221, which is arranged around the hollow space 203 that is not visible in this representation. Furthermore, the basic structure 201 of the second connection part 200 can be seen in this representation. It can serve to at least partially delimit the second connection part 200 from its surroundings. Recsnn / pznz / B / YiAi The delimitation can serve both for electrical isolation between the environment and the electrically conductive components of the second connection part 200, for example, the second electrical contact 221, and also to protect the second connection part 200 from moisture and / or other environmental influences, such as dust, vapors, or unwanted mechanical forces. The basic structure 201 also serves to fix the second connection part 200 to nearby parts of the vehicle or installation components and / or as a central support component for fixing other components of the second connection part 200 to it. Figure 3b further shows the contact establishing axis 11 in an orientation with respect to the second connection part 200 in which it can be joined to the first connection part 100.Furthermore, Figure 3b shows the arrangement of an electrical conductor 227 connected to the second electrical contact 221. The electrical conductor 227 is configured to carry large electrical currents, for example up to 1600 A, preferably 1900 A, and most preferably up to 3000 A. An electrical connection capable of carrying such a current, for example, or in particular without time limit, can be called a high-current connection. The electrical connection established by touching the first electrical contact 121 and the second electrical contact 221 can be a high-current connection. Additionally, an electrical connection can be established with the electrical conductor 227 between the second electrical contact 221 and, for example, an electrical energy storage device (not shown). The electrical current can be, for example, direct current.However, an alternating current is also conceivable. Figure 3c shows the second connection part 200 depicted in Figures 3a and 3b in a slightly perspective view. The second connection part 200 can be seen here in a state where the first connection part 100 is not plugged into the second connection part 200 or is in its rest position. In this state, the second electrical contact 221 (not visible in Figure 3c) is covered by the contact resetter 240. Therefore, in this state, it is at least more difficult for a user to touch the second electrical contact 221. Figure 3d shows the second part of connection 200 from Figure 3c in a side view. The second conductor contacts are shown. The protective conductor 222, which is arranged in holes 231 provided for this purpose in the conical projections 230, has a movable position. The second contacts of the protective conductor 222 are movably arranged and can be pressed away from the hollow space 203 of the second connecting part 200 towards a pretensioning element 222a, for example, a mechanical spring. This pushing can be carried out, for example, by the first contacts of the protective conductor 122 of the first connecting part 100 that protrude from the notches 130.The pretensioning element 222a of the second contact of the protective conductor 222 is configured to exert a force on the second contact of the protective conductor 222, directed towards the hollow space 203 of the second connecting part 200, for example, a spring force, the magnitude of which depends on the degree of spring compression. The pretensioning force allows the position of the second contact of the protective conductor 222 to be adjusted, particularly when the first connecting part 100 is not in the second connecting part 200 or in its rest position, or is only partially in that position. Such a position is shown in Figure 3d, where the second contact of the protective conductor 222 terminates flush with the projection 230. It can also be seen that the contact resetter 240 spatially separates the second electrical contact 221 from the hollow space 203. The contact resetter 240 is configured on the side facing the hollow space 203 in such a way that it can make contact with a large surface area of ​​the second section 102 of the first connecting part 100 and thus exert a displacement force on the second section 102. This displacement force can be provided by a pretensioning element 240a of the contact resetter 240, the pretensioning element 240a also being a mechanical spring, which in figure 3d is arranged on the side of the contact resetter 240 not facing the hollow space 203. Furthermore, the contact resetter 240 is kinematically coupled to the second electrical contact 221, the kinematic coupling comprising a connecting element 241 rigidly attached to the contact resetter and a sliding element 242 that is movable perpendicularly with respect to the contact establishment direction 12. The sliding element 242 is attached Recsnn / pznz / B / YiAi also includes the second electrical contact 221, which in Figure 3d is arranged by means of an elastic element 243, in this case a disc spring, movably on the sliding element 242. The second electrical contact 221 is connected to the electrical conductor 227, which can be flexible and is configured, for example, as a cord. The second electrical contact 221 can be a power contact, configured to conduct high power and / or current, for example up to 1600 A, preferably 1900 A, and most preferably up to 3000 A. The coupling between the rigid connecting element 241 and the movable sliding element 242 can be achieved by means of a bearing 244 (not shown here) arranged in a guide groove 245 (not shown here) of the sliding element 242, which is connected to the connecting element 241, for example, a ball bearing 244. In principle, a guide pin in the guide groove 245 could also be used instead of the bearing 244. However, a bearing 244 offers the advantage of improved mobility with less friction. Furthermore, the movable sliding element 242 is restricted by a guide cylinder 246, which can be moved in a guide bore, to a movement perpendicular to the contact axis 11. Figure 3d also shows a notch 211, which can be engaged with the locking element 111 of the first connecting part 100, such that the locking element 111 is in a locked position and movement of the first section 101 of the first connecting part 100 relative to the second connecting part 200 is prevented. Figure 3d further shows the immobilizing element 210, which in this case is divided into three interconnected cylindrical sections and is elastically (not visible) attached to the second connecting part 200 such that, when the first connecting part 100 is inserted into the hollow space 203 of the second connecting part 200, the immobilizing element 210 moves in such a way that it does not substantially protrude from the respective side wall 202, except when it engages in the immobilizing notch. 110 of the first part of connection 100. Figure 3e shows the second part of connection 200 from Figures 3a to 3d in a state where the second electrical contact 221 protrudes from the respective side wall 202, peeking into the hollow space 203, thus Recsnn / pznz / B / YiAi is visible in the representation. Also visible are the immobilization elements 210, which in this state protrude from the respective side wall 202, peeking into the hollow space 203 of the second connecting part. Figure 3f shows the second connection part 200 of Figure 3e in a side view similar to that in Figure 3d. Unlike Figure 3d, the second connection part 200 can be seen in a state where the second section 102 of the first connection part 100 (not shown in the figure) has been inserted to its final position in the hollow space 203 of the second connection part 200. In this state, the contact resetter 240 is displaced in a direction not facing the hollow space 203, so that the second electrical contact 221 is not covered by the contact resetter 240. With the contact resetter 240, the connection element 241 has been displaced in the contact-making direction.By means of the attached movable sliding element 242, the second electrical contact 221 has also been displaced in the direction perpendicular to the direction of contact establishment 12, such that one end of the second electrical contact 221 facing the hollow space 203 protrudes into the hollow space 203. The second contacts of the protective conductor 222 are also displaced. In this state, the pretensioning elements 222a of the second contacts of the protective conductor 222 and the pretensioning element 240a of the contact resetter 240 provide pretensioning forces. Figures 4a to 4d show schematic representations of the first connection part 100 and the second connection part 200, respectively, in different positions relative to each other. In particular, they clearly illustrate how the different elements of contact unit 1 cooperate. Figure 4a shows the first connection part 100 and the second connection part 200 schematically in two-dimensional projection. The first connection part 100 and the second connection part 200 are aligned along the contact-establishment axes 11. The contact-establishment axis 11 is oriented in the Y direction of the coordinate system 13. The coordinate axes in the Z and X directions are oriented perpendicular to the contact-establishment axis 11. The schematic representation in Figure 4a is simplified by assuming symmetry with respect to the contact-establishment axis 11. Recsnn / pznz / B / YiAi with respect to the contact establishment axis 11. Therefore, only one half of the two-dimensional projection is represented, since the other half results from the assumed symmetry of the projection. Accordingly, Figure 4a shows the first section 101, the second section 102, and a tensioning element 143 of the first connecting part 100. Also shown are the locking notch 110 and the interlocking element 111. The first contact 121, the first contact of the protective conductor 122, and the electromagnet 124 are also shown. Furthermore, the basic structure 201 of the second connecting part 200, the locking notch 211, and the locking element 210 are shown. In addition, the contact resetter 240 and the pretensioning element 240a of the contact resetter 240 are shown, as well as the second contact 221, the pretensioning element 243 of the second contact 221, and the second contact of the protective conductor 222 of the second connecting part 200. Moreover, in Figure 4a shows the first pilot control contact 123 and the second pilot control contact 223. In Figure 4a, the first connecting part 100 is located outside the second connecting part 200. However, the first and second connecting parts 100, 200 are in a relative position where they can move with respect to each other along the contact axis 11 and can be pushed towards each other. With respect to the coordinate system 13 and starting from the constellation in Figure 4a, the first connecting part 100 can be inserted at least partially into the second connecting part 200, with the first connecting part 100 being displaced in the positive Y-coordinate direction. In Figure 4a, the locking element 111 is in a position where it does not protrude from the lateral surface 101a of the first section 101 in a direction perpendicular to the contact direction.This position of the locking element 111 is simultaneously an unlocked position and a locked position (which is not directly visible in the representation). It is referred to as an unlocked position because the first and second connecting parts 100, 200 are not locked to each other in this way; that is, they can move relative to one another. It is referred to as a locked position because the second section 102 cannot move relative to the first section 101. Recsnn / pznz / B / YiAi Furthermore, it can be seen that the first electrical contact 121 is covered by the first section 101 of the first connection part 100, and the second electrical contact 221 is covered by the contact resetter 240, and is therefore correspondingly inaccessible from a hollow space 203. In this respect, the prestressing element 240a of the contact resetter 240 presses the contact resetter 240 in the direction of the hollow space 203. The movement of the contact resetter 240 is limited in Figure 4a by a projection on the basic structure 201. Figure 4a further shows an actuator 140 comprising an actuator drive 141, for example, an electric motor, an actuator connector 142, for example, a threaded rod, and a tensioning element 143. The actuator drive 141 is configured to move the actuator connector 142 in the Y direction. The actuator connector 142 is coupled to the tensioning element 143, for example, by a threaded connection. The actuator drive 141 is configured in a controllable manner so that the position of the tensioning element 143 in the Y direction can be adjusted by controlling the actuator drive 141. In this respect, the actuator drive 141 can be arranged in a mounting section or form at least partially of one, for example, with an actuator drive housing.The actuator connector 142 and the tensioning element 143 can form a movement section, the movement section being movable with respect to the fixing section. The fixing section is rigidly connected to the first section 101. The representation in Figure 4b is almost identical to that in Figure 4a, with the difference that the first connecting part 100 is now in the rest position. In this rest position, the locking element 210 fits into the locking recess 110. Conversely, the locking element 210 and the locking recess 110 can define the rest position by fitting into each other. A rest position sensor 112, which is omitted from the other figures for clarity, is also shown in Figure 4b. The rest position sensor 112 detects whether the first connecting part 100 is in the rest position. As shown in Figure 4b, the rest position sensor can be placed in various positions, for example, on or within the basic structure 201 of the second Recsnn / pznz / B / YiAi connection part 200 or on or in the first section 101 of the first connection part 100. In addition, several embodiments are possible, for example, as a micro-pushbutton, which is actuated when the first and second connection parts 100, 200 are touched, or also as a Hall sensor, optionally with an opposing magnet, or an eddy current sensor, with which a distance between surfaces of the first and second connection parts 100, 200 can respectively be determined. The signals provided by such sensors 112 can be processed in the control unit 300 (Figure 1). The second electrical contact 221 is covered by the contact resetter 240 and is therefore not accessible from the hollow space 203. The representation in Figure 4c differs from the representation in Figure 4b due to the position of the tensioning element 143. The shape of the locking element 111 is adapted to the shape of the tensioning element 143. This allows the locking element 111 to be displaced by a displacement of the tensioning element 143. The displacement of the tensioning element 143 is made possible by the actuator 141, which is connected to the tensioning element 143 via the actuator connector 142. In Figure 4c, the locking element 111 has been inserted into the notch 211 of the second connecting part 200. Therefore, the first section 101 is positioned in a non-displaceable manner within the second connecting part 200. That is, the first section 101 cannot move relative to the second connecting part 200. However, in this position, movement of the second section 102 relative to the first section 101 is possible (not visible in Figure 4c). In the position shown, the tensioning element 143 and the electromagnet 124 touch on a surface that is essentially perpendicular to the contact-establishing direction 12, so that the tensioning element 143 can exert a displacement force in the positive Y direction on the electromagnet 124.Since the electromagnet 124 is rigidly attached to the second section 102, the displacement force also acts on the second section 102 of the first connecting part 100. The second electrical contact 221 is covered by the contact resetter 240 and is therefore not accessible from the hollow space 203. Unlike the representation in figure 4c, the tensor element 143 is Recsnn / pznz / B / YiAi has been displaced further in the positive Y direction in Figure 4d. Due to the displacement of the tensioning element 143, the second section 102 is also displaced in the positive Y direction, which in turn displaces the contact resetter 240 against the prestressing force of the prestressing element 240a of the contact resetter 240 in the positive Y direction. Due to the displacement of the contact resetter 240, the second electrical contact 221 is no longer covered by the contact resetter 240. The second electrical contact 221 can now move in the Z direction until it touches the first electrical contact 121. In this position, where the first electrical contact 121 and the second electrical contact 221 touch, there is an electrical connection between the first connecting part 100 and the second connecting part 200, so that a current flow can be conducted through the contact unit 1.The movement of the second electrical contact 221 can be achieved by a preload force exerted by the mechanical spring 243 shown in Figure 4d on the second electrical contact, or, for example, by the previously described kinematic coupling between the contact resetter 240 and the second electrical contact 221. In the position of the second section 102 shown in Figure 4d, the electromagnet 124 can provide an attractive force to the opposing magnetic plate 224 when the electromagnet 124 is in an active state, for example, by supplying an electric current to its coil winding. The current flow in the coil winding can be induced by an electric current source electrically connected to the coil winding, which can be switched on and / or off, for example, by means of a switch. In this case, the switch may be operated by the control unit 300 (not shown).The switch can also be operated manually. The switch can be provided, for example, as a control element 126 in the clamping device 190 or via a user interface that allows a user to influence the function of the contact unit 1. The representations shown in figures 4a to 4d also show the order in which the steps of a procedure can be carried out by which an electrical contact can be established between the first connection part 100 and the second connection part 200. The representations shown in figures 5a to 5d illustrate one possible order in which the steps of a procedure can be performed Recsnn / pznz / B / YiAi with which the electrical connection between the first connection part 100 and the second connection part 200 can be separated. In this respect, figures 5a to 5d show respectively a schematic representation of the first and second connection parts 100, 200 in different positions of one with respect to the other. The representation in figure 5a is similar to the representation in figure 4d. Unlike Figure 4d, in Figure 5a the tensioning element 143 is in a position away from the electromagnet 124, into which, nevertheless, the locking element 111 fits into the first section 101 of the first connecting part 100 and the notch 211 fits into the second connecting part 200. The first electrical contact 121 and the second electrical contact 221 touch each other, i.e., there is an electrically conductive connection between them, so that a current flow can be conducted through the contact unit 1. When the electromagnet 124 is in an active state, the tensioning element 143 can be in a position away from the electromagnet 124, since the position of the second section 102 with respect to the second connecting part 200 is maintained by the magnetic attraction forces between the electromagnet 124 and the opposing magnetic element 224. However, when the electromagnet 124 is brought to an inactive state, for example by interrupting the current flow through the coil loop of the electromagnet 124, no magnetic attraction forces act between the electromagnet 124 and the opposing magnetic element 224. In this way, a recoil force is exerted on the second section 102 by a pretensioning force of the pretensioning element 240a of the contact resetter 240, so that it moves in the negative Y direction. The result of this movement is shown in Figure 5b. The movement of the second section 102 is limited by the tensioning element 143. As shown in Figure 5b, as a result of this movement, the electrical connection between the first electrical contact 121 and the second electrical contact 221 is also separated by the gap between the two contacts 121, 221. The second electrical contact 221 is covered by the contact resetter 240 and is therefore inaccessible from the hollow space 203. Figure 5b also shows that the movement of the contact resetter 240 in the negative Y direction is limited by a stop in the basic structure 201. Recsnn / pznz / B / YiAi Figure 5c shows the tensioning element 143 of the first connecting part 100 in a position displaced in the negative Y direction compared to Figure 5b. In this position, the locking element 111, which is kinematically coupled with the tensioning element 143, has reached an unlocked position. In this position, movement of the first section 101 relative to the second connecting part 200 is possible, while movement of the second section 102 relative to the first section 101 is simultaneously prevented. In this respect, the unlocked position is also a locked position. The tensioning element 143 and the electromagnet 124 no longer touch each other. Figure 5c is similar to Figure 4b; that is, this positioning of the elements of the contact unit 1 can occur both when the electrical connection is established and when it is broken. The first connection part 100 can now be separated from the second connection part 200 by displacement along the contact-establishment direction 12, more precisely in the negative Y direction. The result of this separation is shown in Figure 5d. Figure 5d is similar to Figure 4a; that is, this positioning of the elements of the contact unit 1 can occur both when the electrical connection is established and when it is broken. Figures 6a to 6b show a schematic representation of the tensioning element 143. In this respect, Figure 6a shows an isometric view and Figure 6b shows a side view of the tensioning element 143. The tensioning element 143 comprises a domed tension washer 148 with a bore 149, as well as longitudinal elements provided with a guide groove 144. The coordinate system 13 is shown in Figure 6b. The guide groove 144 has three sections 145, 146, and 147, which are particularly visible in Figure 6b. These are an elongated section 146 extending in the Y direction, a short section 147 extending in the Y direction, and a transition section 146 joining the elongated section 145 and the short section 147. The long section 145 and the short section 147 are offset parallel to each other. The guide groove 144 is configured to guide a guide pin 150 (shown in Figures 6c and 6d) of the locking element 111 (not shown here). When the tensioning element 143 is displaced in the Y direction, this guide pin 150, which is arranged in the guide groove 144 and guided Recsnn / pznz / B / YiAi, through the guide slot 144, moves in the Z direction. The exact position of the guide pin 150 in the Z direction is predetermined by the position of the tensioning element in the Y direction. The locking element 111, which is rigidly connected to the guide pin 150, can thus move in the Z direction. The tension washer 148 and the hole 149 can be used to couple the tensioning element 143, for example, a threaded rod, to the actuator drive 141, for example, a linear motor, by passing the threaded rod through the hole 149 and securing it there with a threaded connection. Figures 6c to 6d show a schematic representation of the kinematic coupling between the tensor element 143 and the locking element 111. The coordinate system 13 can be applied analogously from Figure 6b to Figures 6c and 6d. In this respect, it can be seen that the guide pin 150, which may, for example, have a cylindrical shape and is rigidly connected to the locking element 111, with the axis of the cylinder oriented in the X direction, is arranged in the guide groove 144. Figure 6c shows a position of the tensioning element 143 in which the guide pin 150 is located in the short section 147 of the guide groove 144. In this case, the locking element 111 does not protrude from the first section 101 of the first connecting part 100. In Figure 6d, the tensioning element 143 has been displaced such that the guide pin 150 is located at one end of the elongated section 145 of the guide groove 144.The guide pin 150 has been displaced in this respect in the Z direction such that the locking element 111 rigidly coupled with it protrudes from the first section 101 of the first connecting part 100. Figures 7a to 7b show a schematic representation of the locking and unlocking of a second section 102 of the first connecting part 100. Compared to what is shown in Figures 6a to 6d, Figures 7a and 7b depict the second section 102 of the first connecting part 100, with other details omitted or obscured. The second section 102 comprises a locking guide groove 151 into which the guide pin 150 projects. The locking guide groove 151 has a release section 152 extending in the Y direction and a locking section 153 extending in the Z direction. Recsnn / pznz / B / YiAi If the guide pin 150 is in the position shown in Figure 6c, which is determined by the position of the tensioning element 143, the position of the guide pin 150 with respect to the locking guide slot 151 corresponds to the position shown in Figure 7a. That is, the guide pin 150 is located in the locking section 153 of the locking guide slot 151. In this position, the locking guide slot 151 and the guide pin 150 prevent the second section 102 of the first connecting part 100 from moving in the Y direction. This prevents the second section 102 from sliding out of the first section 101 of the first connecting part 100, which partially encloses the second section 102, as shown in Figure 7a. On the other hand, this ensures that the first electrical contact 121 is covered by the first section 101 of the first connection part 100 and is therefore not accessible to touch by hand.In this way, security requirements can be met. If the guide pin 150 is in the position shown in Figure 6d, which is determined by the position of the tensioning element 143, the position of the guide pin 150 with respect to the locking guide groove 151 corresponds to the position shown in Figure 7b. That is, the guide pin 150 is located in the release section 152 of the locking guide groove 151. In this position, movement of the second section 102 of the first connecting part 100 is permitted in the Y direction, so that, for example, an electrical connection can be established between the first and second connecting parts 100, 200. Figures 8a to 8c show schematic representations of the first and second connection parts 100, 200 when an electrical connection is established between them. The figures show different cross-sectional views and varying levels of detail. Figure 8a shows the first connection part 100 in its rest position. This position corresponds to the position shown in Figure 4c. The first contacts of the protective conductor 122 of the first connection part 100 and the second contacts of the protective conductor 222 of the second connection part 200, which are not touching in this position, can also be seen. Figure 8b shows a second section 102 displaced in the contact-establishment direction 12, i.e., in the Y direction, specifically the positive Y direction, relative to Figure 8a. The second section 102 touches the contact resetter 240, the contact resetter 240 being displaced by Recsnn / pznz / B / YiAi the displacement of the second section 102. Therefore, the second electrical contact 102 is no longer covered by the contact resetter 240. Furthermore, the movement of the contact resetter 240 is transmitted via the connecting element 241 to the sliding element 242, so that the sliding element 242 can be seen in figure 8b in a position to which the second electrical contact 221, connected to the sliding element 242, has been displaced in the direction of the first electrical contact 121. It can be seen that there is still no electrical connection between the first electrical contact 121 and the second electrical contact 221, while the first contact of the protective conductor 122 and the second contact of the protective conductor 222 are touching each other, i.e., while an electrical connection is established between the two. Figure 8c shows a second section 102 offset in the contact-establishment direction 12, i.e., in the Y direction, specifically the positive Y direction, relative to Figure 8b. It can be seen how the projection 230 of the second connecting part 100 fits into the notch in the second section 102 of the first connecting part 100. The first electrical contact 121 and the second electrical contact 221 now touch each other, so that there is an electrical connection through which a high electrical current can also be conducted. Figures 9a and 9b show a schematic representation of the kinematic coupling between the contact resetter 240 and the second electrical contact 221, as used in the contact unit 1 of Figures 8a to 8c. In this regard, Figure 9a shows bearings 244, for example ball bearings, which are fixed to the connecting element 241, for example, by a rigid connection between an inner ring of the bearing 244 and the connecting element 241. This means that when the connecting element 241 is displaced in the Y direction, for example, by a displacement of the contact resetter 240 in the Y direction, the bearings 244 are simultaneously displaced in the Y direction. As can be seen in Figure 9b, each of the bearings 244 protrudes into a section of a guide groove 245 of the sliding element 242.Each section of the guide groove 245 is configured such that the respective roller bearing 244 can perform an elongated movement in the Y direction and a less elongated, i.e., short, movement in the Z direction with respect to the guide groove 245. The ratio of the elongated movement to the short movement is. Recsnn / pznz / B / YiAi proportional to a force transmission ratio between a displacement force acting on the force resetter 240 and a force applied to the second electrical contact 221 and acting in the direction of the first electrical contact 121. The sliding element 242 also features a fixation in the Y direction. This fixation is achieved by means of the (concealed) guide holes in the sliding element 242 in the Z direction, and guide cylinders 246 fixed to the basic structure 201, along which the sliding element 242 can move. Due to this structure, it is now possible that when the contact resetter 240 moves in the Y direction, this movement is transformed into a Z-direction movement of the sliding element 242. Figures 10a to 10c show schematic representations of an air duct for temperature conditioning. Figure 10a will be discussed first. Incoming air 184 is supplied at the air inlet openings 180, for example, by a pressurized air reservoir fluidly connected to the air inlet openings 180, or, for example, by a compressor or fan fluidly connected to the air inlet openings 180. In this example, the air inlet openings 180 are arranged on a surface of the second section 102 of the first connecting part 100, opposite the front surface 102a (not visible). The incoming air 184 enters the air ducts 181 through the air inlet openings 180, from which it is distributed to an air distributor 182.The air distributor 182 is designed to distribute the incoming air 184 before it exits the air distributor 182 at the first connection point 100, such that the outgoing air 185, i.e., the air exiting the air distributor 182 at the air outlet opening 183, is distributed as evenly as possible in the space at the first electrical contact 121. The outgoing air 185 passes over the first electrical contact 121 after exiting and simultaneously absorbs some heat generated at the first electrical contact 121 as a result of the conduction of electric current. This cools the first electrical contact 121 and warms the air. Figure 10a further shows an electrical conductor 160 connected to the first electrical contact 121. The electrical conductor 160 is configured to carry large electric currents. Recsnn / pznz / B / YiAi example up to 1600A, preferably 1900A, especially preferably up to 3000A. With the electrical conductor 160, an electrical connection can be established, for example, between the first electrical contact 121 and an electrical power source or an electrical power receiver. Figure 10b shows the structure depicted in Figure 10a also in a perspective view. In this respect, in addition to what is shown in Figure 10a, arrows are also indicated to mark the outgoing air 185. It can be seen that the outgoing air 185 exits from the air outlet openings 183 next to the first electrical contact 121. The direction of exit is, in this respect, essentially perpendicular to the contact-establishing axis 11. Figure 10c shows the structure of Figure 10b in a side view, clearly showing the first electrical contact 121. Figure 10c also shows, as an example, a temperature sensor 186, which can detect, for example, a temperature in the vicinity of the first electrical contact 121 and provide the detected temperature, for example, as a corresponding signal to the control unit 300. The temperature sensor can also be arranged at another point on the first connection part 100, for example, on or in an air conduit 181, on or in the air distributor 182, or on an electrical conductor 160.Another possible criterion for the placement of the temperature sensor could be that the measured temperature can indicate whether it has fallen above or below, for example, a temperature limit related to the material used in the contact unit. The temperature measured by temperature sensor 186 can be provided as a signal to the control unit 300. Figures 11a and 11b show a schematic representation of an alternative air duct for temperature conditioning. Unlike the embodiment shown in Figures 10a to 10c, the air outlet openings 183 are now oriented such that the outgoing air 185 does not exit perpendicularly to the contact-establishing axis 11, but rather at an inclined angle to it, so that the airflow direction has a component along the contact-establishing axis 11. This allows the outgoing air 185 to be directed more selectively to the first electrical contact 121. In this way, the cooling effect of the outgoing air 185 can be improved. Figure 11a Recsnn / pznz / B / YiAi shows this realization in a perspective view, figure 11b in a side view. Figures 12a and 12b show a schematic representation of the alternative air ducting for temperature conditioning with the first and second connection parts 100, 200. In Figure 12a, the first and second connection parts 100, 200 are shown in a relative position where an electrical connection exists between them. The first connection part 100 corresponds to the first connection part 100 in Figures 11a and 11b. The outgoing air 185 is conducted through the first electrical contact 121 and the second electrical contact 221 and can absorb the heat generated there. The outgoing air 185 thus reaches the hollow space 203 (not shown) and can then exit the hollow space 203 through the openings as outlet air 250. Figure 12b illustrates this from a side view. Figure 12b also shows, as an example, a temperature sensor 251, which can detect, for instance, a temperature in the vicinity of the second electrical contact 221 and provide the detected temperature, for example, as a corresponding signal to the control unit 300. It is also conceivable, for example, that the control unit 300 controls the current flowing through the electrical connection between the first electrical contact 121 and the second electrical contact 221 based on the detected temperature, so that, for example, the current is reduced as the temperature approaches a predefined upper limit. In this application, the control unit 300 could also send a signal to supply more air and / or more refrigerant for cooling contact unit 1.It is also possible to arrange the temperature sensor 251 at another point on the second connection part 200, for example on or inside the hollow space 203 or also on an electrical conductor 227. A possible criterion for the placement of the temperature sensor may also be that it can be deduced from the measured temperature whether it has remained above or below, for example, a temperature limit value related to the material used in the contact unit. Contact unit 1 can be used to connect a battery Recsnn / pznz / B / YiAi rechargeable battery in a vehicle with a power source. For this purpose, the first electrical contact 121 of the first connection part 100 can be electrically connected to the electrical conductor 160 arranged in the first connection part 100 and can be connected via this to an electrical power source. Likewise, the second electrical contact 221 of the second connection part 200 can be electrically connected to the electrical conductor 227 arranged in the second connection part 200 and can be connected via this, for example, to a rechargeable battery accumulator. It is also possible to conduct electrical energy in the form of electric current from the energy storage device, which in this case serves as the energy source, to the supply network, which in this case represents an energy receiver, via contact unit 1, for example, to stabilize the electrical supply network or a part thereof and / or, more generally, to supply power from the energy storage device to the network. For this purpose, the supply network can be electrically connected, for example, to the first electrical contact 121, and the energy storage device can be electrically connected to the second electrical contact 221. It is also conceivable, for example, that the electrical supply network is electrically connected to the second electrical contact 221 and the energy storage device is electrically connected to the first electrical contact 121. References 1 Contact unit Contact Establishment Axis Contact establishment address Cartesian coordinate system 100 First part of connection 101 First section 101 a Lateral surface of the first section 102 Second section 102a Front surface of the second section 102b Lateral surface of the second section 110 Immobilization notch 111 Interlocking element 111a Locking notch 112 Rest position sensor 121 First electrical contact Recsnn / pznz / B / YiAi First contact of the protection driver First pilot control contact Electromagnet Control element Notch for protective conductor in the first connection part Top edge Protruding in the second section of the first part of the connection Actuator Actuator drive Actuator connector tensor element Guide groove for the tensioning element Long section Connection section Short section Tension washer Drill Guide pin Locking guide slot Release section Lock section Electrical conductor Air inlet opening Air conduit Air distributor Air outlet opening Incoming air / air that has entered Outgoing air / air that has come out Temperature sensor Clamping device Spacer Second part of connection Basic structure of the second part of the connection Front surface of the second connecting part Side surface of the second connecting part Empty space Sealing element Immobilization element Notch Recsnn / pznz / B / YiAi Second electrical contact Second contact of the protective conductor Pretensioning element of the protective conductor contact Second pilot control contact Antagonist magnetic element Electrical conductor Outgoing Drill Stop Contact Restarter Contact Restarter Pretensioning Element Connecting element Sliding element Spring element Bearing Guide groove for the sliding element Guide cylinder Exhaust air Temperature sensor Control unit First control unit Second control unit Recsnn / pznz / B / YiAi

Claims

CLAIMS 1. Contact unit (1) for establishing an electrically conductive connection comprising - a first connecting part (100) with a first electrical contact (121) and a second connecting part (200) with a second electrical contact (221), or the first connecting part (100) and the second connecting part (200) being movably arranged relative to each other along a contact-establishing axis (11) running in a contact-establishing direction (12); or the first connecting part (100) comprising a first section (101) and a second section (102), the second section (102) being movable relative to the first section (101) and the first electrical contact (121) being arranged in the second section (102);or the first connecting part (100) being positionable with respect to the second connecting part (200) in such a way along the contact-establishing axis (11) that the first section (101) of the first connecting part (100) is disposed in a rest position with respect to the second connecting part (200); or the first electrical contact (121) and the second electrical contact (221) being configured to establish, when touching each other, an electrically conductive connection between the first connecting part (100) and the second connecting part (200), which is configured to conduct electrical energy; - a positioning unit (131, 110, 210) that is configured to predetermine the rest position;- an actuator (140) configured, when the first section (101) of the first connecting part (100) is in the rest position, to displace the second section (102) of the first connecting part (100) in the contact-making direction (12) relative to the first section (101) such that the second section (102) of the first connecting part (100) and the second connecting part (200) seat against each other in the contact-making direction (12), in addition to the first electrical contact (121) and the second electrical contact (221) touching each other. Recsnn / pznz / B / YiAi; 2. Contact unit (1) according to claim 1, comprising a locking element (111), the locking element (111) being movable between a locking position and an unlocking position, the locking element (111) being configured - to prevent, in the locking position, movement of the first section (101) of the first connecting part (100) with respect to the second connecting part (200) and to permit movement of the second section (102) of the first connecting part (100) with respect to the first section (101) of the first connecting part (100), and - to permit, in the unlocking position, movement of the first section (101) of the first connecting part (100) with respect to the second connecting part (200) and to prevent movement of the second section (102) of the first connecting part (100) with respect to the first section (101) of the first connecting part (100). (101) of the first connection part (100).

3. Contact unit (1) according to claim 2, the first section (101) of the first connecting part (100) and the second connecting part (200) respectively having a notch (111a, 211), the locking element (111) being configured to fit into the locking position in the notch (111a) of the first part (101) of the first connecting part (100) and the notch (211) of the second connecting part (200).

4. Contact unit (1) according to any one of claims 2 to 3, the actuator being connected to the first section (102) of the first connecting part and being configured to move the locking element (111) between the locking position and the unlocking position.

5. Contact unit (1) according to any of the preceding claims, comprising an electromagnet (124) and an opposing magnetic element (224), the electromagnet (124) being configured to provide in an active state and when the second section (102) of the first connecting part (100) and the second connecting part (200) are brought against each other in the direction of Recsnn / pznz / B / YiAi contact establishment (12), by means of a magnetic field together with the opposing magnetic element (224) a magnetic attraction force between the second section (102) of the first connecting part (100) and the second connecting part (200), the magnetic attraction force being at least so large that it holds the second section (102) of the first connecting element (100) in a position in which the first electrical contact (121) and the second electrical contact (221) touch.

6. Contact unit (1) according to any of the preceding claims, comprising the first electrical contact (121) a first power contact and the second electrical contact (221) a second power contact.

7. Contact unit (1) according to any of the preceding claims, comprising the first connection part (100) a first contact of the protective conductor (122) and the second connection part (200) a second contact of the protective conductor (222), the first contact of the protective conductor (122) being electrically connected to an electrical earth potential and being configured to establish an electrical connection of the second contact of the protective conductor (222) to the earth potential when it touches the second contact of the protective conductor (222).

8. Contact unit (1) according to claim 7, the second contact of the protective conductor (222) cooperating with a pretensioning element of the protective conductor (222a) that is configured to provide a contact force between the first and second contact of the protective conductor (122, 222) when the first contact of the protective conductor (122) and the second contact of the protective conductor (222) touch, and the first and second contact of the protective conductor (122, 222) being arranged opposite each other respectively on a surface that is oriented respectively in a manner essentially perpendicular to the axis of establishing contact (11).

9. Contact unit (1) according to any of the preceding claims, comprising the second connection part (200) a movable contact protection resetter (240), provided with a pre-tensioning element (240a), which is configured to displace, when the first section (101) of the first connection part (100) is in the rest position, the second section (102) of the first connection part (100) in the contact establishment direction (12) with respect to the first section (101) in such a way that the first electrical contact (121) and the second electrical contact (221) are spaced apart from each other.

10. Contact unit (1) according to claim 9, the second electrical contact (221) being movable and comprising a kinematic coupling between the second electrical contact (221) and the contact protection resetter (240), the kinematic coupling being configured to transmit a movement from the contact resetter (240) to the second electrical contact (221) to cause the first electrical contact (121) and the second electrical contact (221) to touch each other with a contact force or to separate the first electrical contact (121) from the second electrical contact (221).

11. Contact unit (1) according to any of the preceding claims, comprising a clamping device (190) joined with the first connecting part (100) and configured to provide an interface for positioning the first connecting part (100) with respect to the second connecting part (200).

12. Contact unit (1) according to any of the preceding claims, wherein the first connection part (100) is electrically connected to an electrical power source and the second connection part (200) is electrically connected to a rechargeable electrical energy storage device or the first connection part (100) is electrically connected to a rechargeable electrical energy storage device and the second connection part (200) is electrically connected to an electrical power source.

13. Contact unit (1) according to any of the preceding claims, the first and / or second connection part (100, 200) having a temperature conditioning that is configured to adjust the temperature of the first and / or second connection part (100, 200) to a temperature below 120 °C, preferably 90 °C, most preferably 60 °C.

14. Use of a contact unit (1) according to one of the preceding claims for recharging a battery accumulator of a battery-powered electrical vehicle.

15. A method for operating a contact unit (1) comprising - arranging a first connecting part (100) with a first electrical contact (121) and a second connecting part (200) with a second electrical contact (221) such that the first connecting part (121) and the second connecting part (200) are movable relative to each other along a contact-making axis (11) running in a contact-making direction (12), the first connecting part (100) being positionable relative to the second connecting part (200) such that along the contact-making axis (11) a first section (101) of the first connecting part (100) is arranged in a rest position relative to the second connecting part (200); - positioning a first section (101) of the first connecting part (100) in the rest position relative to the second connecting part (200);- displacing a second section (102) of the first connecting part (100) in the contact-establishing direction (12) with respect to the first section (102), so that the second section (102) of the first connecting part (100) and the second connecting part (200) sit against each other in the contact-establishing direction (12), in addition to the first electrical contact (121) and the second electrical contact (221) touching each other.;

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