WO2020011293A1 - Device for producing an electrically conductive connection - Google Patents

Abstract

The invention relates to a device (10) for producing an electrically conductive connection, having a first elongate contact-making part (12), which extends along a longitudinal axis (14) and has a contact-making section (16), and a second elongate contact-making part (18), which extends along a longitudinal axis (20) and has a contact-making section (22), wherein the first contact-making part (12) and the second contact-making part (18) are able to be brought into a contact state by means of an axial movement of the first contact-making part (12) and/or the second contact-making part (18), in which contact state the contact-making section (16) of the first contact-making part (12) and the contact-making section (22) of the second contact-making part (18) are in electrically conductive contact with one another, wherein the device (10) also has a securing device (24), which is able to be released, in particular, in a reversible and destruction-free manner and which is configured in a securing state to prevent the contact-making section (16) of the first contact-making part (12) and the contact-making section (22) of the second contact-making part (18) from coming out of contact.

Description

 Device for producing a

 electrically conductive connection

description

The invention relates to a device for producing an electrically conductive connection, having a first elongated contacting part which extends along a longitudinal axis and has a contacting section, and a second elongated contacting part which extends along a longitudinal axis and has a contacting section, the first contacting part and the second contacting part can be brought into a contact state via an axial movement of the first contacting part and / or the second contacting part, in which the contacting section of the first contacting part and the contacting section of the second contacting part are in electrically conductive contact with one another. The invention also relates to an electrical energy store having one or more cells for storing electrical energy and one or more devices for producing an electrically conductive connection.

In addition, the invention relates to a vehicle with an electrical energy store. In the area of high-voltage technology, in particular when contacting electrical energy stores for electric or hybrid vehicles, the production of an electrically conductive connection is still comparatively time-consuming and cost-intensive. For example, connection cables are attached to a contact pole using a screw. Costly special tools are regularly required to produce a corresponding fastening. Furthermore, the use of specially trained people is necessary, which further increases the costs.

In other solutions, plug-in systems are used in which a bracket is locked on a plug housing. Corresponding systems However, they require a comparatively large installation space during assembly, so that their use is ruled out in a large number of application areas.

From the document DE 10 2016 014 096 A1, a device for producing an electrically conductive connection is known, in which two jacket elements, which are each assigned to an electrical conductor element, are fastened to one another by means of a securing bolt, the securing bolt being used to bring about a securing state by one Is to be rotated substantially perpendicular to the casing axis of rotation.

However, these and other known solutions for producing an electrically conductive connection are cost-intensive and / or require complex and / or time-consuming work processes for producing the electrically conductive connection.

The object on which the invention is based is therefore to simplify the production of an electrically conductive connection, in particular in the case of components from the field of high-voltage technology.

The object is achieved by a device of the type mentioned at the outset, the device according to the invention having a, in particular reversibly and non-destructively releasable, securing device which is set up to prevent the contacting section of the first contacting part and the contacting section of the device from coming out of contact in a secured state to prevent second contacting part.

The first contacting part and / or the second contacting part preferably each have a round cross section, at least in sections, and / or are at least sectionally cylindrical.

In a preferred embodiment of the device according to the invention, the contacting section of the first contacting part is arranged on an end face of the first contacting part. Alternatively or additionally, the contacting section of the second contacting part is arranged on an end face of the second contacting part. Because the contacting sections are arranged on the end faces of the first contacting part and the second contacting part, the first contacting part and the second contacting part can be axially aligned with one another on a common longitudinal axis be moved until the respective end faces meet, so that an electrically conductive connection between the first contact part and the second contact part is created. The first contact part is preferably designed as a male contact part, the second contact part being designed as a female contact part. In this case, the second contacting part has a recess on the end face facing the first contacting part for receiving the contacting section of the first contacting part. Alternatively, the first contact part can be designed as a female contact part, the second contact part being designed as a male contact part. In this case, the first contacting part has a recess on the end face facing the second contacting part for receiving the contacting section of the second contacting part. The contacting sections of the first contacting part and the second contacting part are preferably designed in such a way that a round contact and / or a circumferential contact surface, which is not designed as a conical surface, occurs between the first contacting part and the second contacting part in the contact state. The second contact part preferably has a contact seat for the first contact part. In particular, the first contacting part or the second contacting part has an electrically non-conductive cap on an end-side end section, which is formed, for example, from plastic. The cap serves as a protection against contact and ensures a considerable increase in safety during the assembly of the device according to the invention. The end face of the first contacting part or of the second contacting part is preferably at least sectionally frustoconical and / or has a narrowing cross section. The frustoconical design of the end face of the first contacting part or of the second contacting part allows the generation of high contact pressing forces between the first contacting part and the second contacting part. In addition, the frustoconical design of the end face of the first contacting part or of the second contacting part ensures a comparatively white large contact surface, which ensures good transmission of current and temperature.

The device according to the invention is further advantageously developed in that the securing device is designed in such a way that at least part of the securing device is moved by one to bring about the securing state The axis of rotation is to be rotated, the axis of rotation running essentially parallel or in alignment with the longitudinal axis of the first contacting part and / or essentially parallel or in alignment with the longitudinal axis of the second contacting part. Thus, in order to bring about the securing state, an axial rotation must be carried out on at least part of the securing device, on the first contacting part and / or on the second contacting part. As a result of the fact that the necessary rotary movement for bringing about the securing state is to be carried out about an axis of rotation which runs essentially parallel or in alignment with the longitudinal axis of the first and / or second contacting part, the free space required for mounting the device according to the invention is considerably reduced compared to known devices. This is particularly true in comparison to a device in which a securing bolt is to be rotated about an axis of rotation which is essentially perpendicular to the longitudinal axis of the first or of the second contacting part. Furthermore, the handling of the device is considerably simplified by a corresponding anti-rotation device, since a mechanism can be implemented using suitable protective sleeves, which mechanism can easily be operated manually. This eliminates the need to use special tools.

In addition, a device according to the invention is preferred in which, after the securing state has been brought about, free axial rotation of the securing device, the first contacting part and / or the second contacting part is substantially prevented. Known devices for establishing an electrically conductive connection, which allow axial rotation, have the disadvantage that the execution of a corresponding axial rotation is also possible after the securing state has been brought about. This can lead to fretting in particular at the contact points, so that the contact points wear out particularly quickly due to micro-movements, for example due to vibrations. This effect can be accompanied by a development of corrosion, so that the service life of the device is considerably increased by the fact that free axial rotation of the securing device, the first contacting part and / or the second contacting part is essentially prevented after the securing state has been brought about. A relative axial rotation of the first contacting part and the second contacting part preferably follows Preventing the securing state prevented, so that fretting is effectively avoided in the contact area between the first contact part and the second contact part. The first contacting part and the second contacting part preferably clamp firmly together in the secured state, so that a relative movement of the first contacting part and the second contacting part is prevented in the secured state.

In a development of the device according to the invention, the securing device is designed as a bayonet catch. The bayonet catch can include parts that are formed separately from the first contact part and the second contact part. Furthermore, the bayonet catch can comprise parts which are components of the first contact part and / or the second contact part. In particular, the bayonet catch has on the one hand one or more slots and on the other hand one or more bayonet bolts. The one or more bayonet bolts with the one or more slots can preferably be brought into engagement with one another to bring about the securing state and / or can be latched into the one or more slots.

In a development of the device according to the invention, the securing device has a fastening sleeve and a fixing device, which are designed to engage with one another in the securing state of the securing device in such a way that the contacting section of the first contacting part and the contacting section of the second contacting part come out of contact is prevented. The fastening sleeve can be in contact with the first contact part or the second contact part. Furthermore, the fixing device can be in contact with the first contacting part or the second contacting part. The fastening sleeve and the first contacting part are preferably to be rotated relative to one another in order to bring about the securing state of the securing device. The relative rotation of the fastening sleeve and the first contacting part can preferably be carried out manually and without tools due to the comparatively low required torque. Alternatively, the fastening sleeve and the second contact part can be rotated relative to one another in order to bring about the securing state of the securing device. Preferably, the relative rotation of the mounting sleeve and the second Contacting part can be carried out manually and without tools due to the comparatively low required torque.

In a development of the device according to the invention, the fastening sleeve is set up to be pushed onto the first contacting part or the second contacting part. In particular, the fastening sleeve has a recess, the cross section of which allows the fastening sleeve to be pushed onto the first contacting part or the second contacting part. The fastening sleeve is preferably axially displaceable on the first contacting part or the second contacting part, provided that the securing state of the securing device has not yet been brought about. The first contact part or the second contact part preferably has an axial stop for the fastening sleeve, the axial stop limiting the axial movement of the fastening sleeve in an axial direction. The axial stop can be, for example, an outwardly extending material projection, such as a circumferential, outwardly extending material collar. Additional components, such as a spring element, can be arranged between the axial stop and the fastening sleeve.

In a further embodiment of the device according to the invention, the fixing device is connected to the first contact part or the second contact part. The fixing device is preferably fixed immovably in the axial direction on the first contact part or the second contact part. The fixing device can be, for example, a locking pin which extends across the first contact part or the second contact part. Alternatively, the fixing device can also comprise one or more, in particular two opposite, material projections extending outwards. The material projections can be integral components of the first contacting part or of the second contacting part or can be connected to the first contacting part or the second contacting part in a force-locking, form-fitting and / or material-locking manner.

In a preferred development of the device according to the invention, the fastening sleeve is designed as a bayonet sleeve and preferably has one or more slots for receiving one or more bayonet bolts. Preferably, the fastening sleeve designed as a bayonet sleeve has two Opposing slots which extend in a first region substantially parallel to the longitudinal axis of the first contacting part and / or the second contacting part and in a second part essentially in the circumferential direction with respect to the longitudinal axis of the first contacting part and / or the longitudinal axis of the second contacting part extend. The one or more slots preferably have a slot opening, the one or more slot openings being arranged on an end face of the fastening sleeve designed as a bayonet sleeve.

Also preferred is a device according to the invention, in which the fixing device has one or more bayonet bolts which can be inserted into one or more slots of a bayonet sleeve. The one or more bayonet bolts can be designed, for example, as pins which protrude in the radial direction from the first contact part or the second contact part.

The bayonet sleeve and the one or more bayonet bolts are preferably designed to convert a rotational movement applied to the bayonet sleeve or the one or more bayonet bolts into a linear movement. This results in a leverage effect, since a comparatively long rotational movement is translated into a comparatively short axial movement. As a result, only low torques are required to bring about the safety state. The necessary torque can also be further reduced by external protective sleeves, since the distance between the tangible outer surface of the device and the axis of rotation is further increased by corresponding external protective sleeves. In this way the leverage is further increased.

In addition, a device according to the invention is advantageous in which the securing device has a spring element which is connected to the fastening sleeve or the fixing device and is set up to generate a tensile force acting in the axial direction between the fastening sleeve and the fixing device in the securing state of the securing direction. The one or more bayonet bolts are held securely within the one or more slots by the tensile force, so that the bayonet locking device prevents Contact of the contacting section of the first contacting part and the contacting section of the second contacting part is effectively prevented. The spring element is preferably designed as a circumferential spring element and encloses the first contact part or the second contact part. The spring element preferably exerts a compressive force between the first contacting part and the fastening sleeve or the second contacting part and the fastening sleeve. The spring element can be designed as a coil spring, plate spring, wave spring or spiral spring.

In addition, a device according to the invention is preferred in which the fixing device is connected in a stationary manner with respect to the first contacting part or the second contacting part to the first contacting part or the second contacting part. For example, the fixing device comprises one or more pins or bolts which extend in the radial direction and which extend through the first contacting part or the second contacting part.

In another embodiment of the device according to the invention, the fastening sleeve rotates at least in sections around the first contacting part and / or the second contacting part and can be rotated relative to the first contacting part and / or the second contacting part in order to establish the securing state of the securing device. By rotating the fastening sleeve relative to the first contacting part and / or the second contacting part, the fastening sleeve and the fixing device can be brought into engagement, so that the contacting section of the first contacting part and the contacting section of the second contacting part are prevented from coming out of contact.

In a further preferred embodiment of the device according to the invention, the fastening sleeve has two, preferably opposite, sleeve wings which are connected to one another via the sleeve base. The sleeve wings preferably extend in the longitudinal direction of the first contact part and / or the second contact part. The sleeve base preferably has a recess, the fastening sleeve being slidable over the recess in the sleeve base onto the first contacting part or the second contacting part. Longitudinally extending slots or longitudinally extending free spaces are preferably formed between the sleeve wings. In a development of the device according to the invention, the fastening sleeve has a widening section, within which one or more material sections of the fastening sleeve extend outwards, so that the cross section of the fastening sleeve increases. The widening section preferably extends over all sleeve wings, so that the distance from opposite sleeve wings changes in the region of the widening section. By means of the widening section, the fastening sleeve can be positively secured against axial displacement. As an alternative or as a function of the widening section, the fastening sleeve can also have one or more latching lances extending outwards and / or one or more material projections extending outwards.

Another embodiment of the device according to the invention has an electrically non-conductive protective device which at least partially surrounds the first contacting part, the second contacting part and / or the securing device. The protective device can be designed in one part or in several parts. The protective device can be partially or completely made of a plastic material. The protective device prevents touching of the electrically conductive parts of the device during the assembly process of the device and / or during the correct use of the device, for example by assembly and / or maintenance personnel. The safety during assembly and when using the device is thus significantly increased.

In a further preferred embodiment of the device according to the invention, the protective device has one or more protective sleeves. The one or more protective sleeves are preferably formed all around. Individual or all protective sleeves of the protective device can be freely rotatable relative to one another. The one or more protective sleeves can be formed in several parts, for example in two parts. In particular, the parts of a protective sleeve can be designed to be foldable relative to one another. In particular, a protective sleeve has one or more hinges, the one or more hinges defining a pivot axis and the parts of the respective protective sleeve being foldable about the pivot axis. The pivot axis preferably runs parallel to the longitudinal axis of the first contacting part and / or parallel to the Longitudinal axis of the second contact part. One or more protective sleeves preferably each have an upper shell and a lower shell, the upper shell and the lower shell being designed to be foldable with respect to one another. Furthermore, one or more protective sleeves can have parts that can be attached to one another in some other way. For example, parts of a protective sleeve can be connected to one another with a clamp connection or a snap connection.

In addition, a device according to the invention is advantageous in which a protective sleeve of the protective device is coupled, in particular in a form-fitting manner, to the fastening sleeve of the securing device in such a way that the fastening sleeve can be rotated relative to the first contacting part and / or the second contacting part by means of a rotary movement of the protective sleeve. Alternatively or additionally, the protective sleeve of the protective device is coupled, in particular in a form-fitting manner, to the fastening sleeve of the securing device in such a way that axial movement of the fastening sleeve is prevented or restricted by the protective sleeve at least in one direction. The protective sleeve of the protective device preferably has one or more receiving chambers, which are designed to receive the widening section of the fastening sleeve. The widening section or the one or more outwardly extending material sections of the fastening sleeve preferably abuts against the wall of the receiving chamber in the region of the widening section when the protective sleeve is rotated. This results in the fastening sleeve being carried along by the protective sleeve, so that a rotational movement of the fastening sleeve is transmitted to the protective sleeve. The rotational movement of the protective sleeve of the protective device can thus bring the fastening sleeve into engagement with the fixing device.

Furthermore, a device according to the invention is preferred, which has an, in particular flexible, electrical conductor, which is partially covered by an insulating sleeve, the electrical conductor being electrically conductively connected at a contact point to the first contact part or the second contact part. The electrical conductor is preferably designed as a cable, it being possible for the electrical conductor to have a plurality of electrically conductive wires. The electrical conductor is designed to heat take. Furthermore, the electrical conductor can be designed to release the absorbed heat to the surroundings of the device. The electrical conductor can thus act as a heat sink. In this way, heating of the device is counteracted. The heat dissipation via the electrical conductor also allows the cross-section to be reduced in the contact area. The reduction in cross-section leads to material savings, so that the manufacturing costs are further reduced.

The electrical conductor can have a comparatively high thermal mass with good thermal conductivity. In particular, the electrical conductor is of large volume and / or made of copper. In the case of known plug connections, the individual components cannot be used to a sufficient extent for heat dissipation, since the transition cross sections are very small. The device according to the invention, on the other hand, has large transition cross-sections, for example in the conical transition between the first contacting part and the second contacting part, as a result of which heat that is generated can be transferred quickly between the individual components of the device and can therefore be dissipated comparatively quickly.

In a preferred embodiment of the device according to the invention, an end section of the electrical conductor that is free of insulation material is welded and / or crimped to the first contacting part or the second contacting part. The outer diameter of the insulation sleeve is preferably larger than the outer diameter of the contacting part, with which the end section of the electrical conductor that is free of insulation material is welded and / or crimped.

In a development of the device according to the invention, a protective sheath of the protective device is connected to the first contacting part or the second contacting part at a first fastening section and to the insulating sheath of the electrical conductor at a second fastening section, the contacting point of the electrical conductor being between the first fastening section and the second fastening section is arranged. A further contact between the insulation sleeve of the electrical conductor and the first contacting part or the second contacting part is thus produced by means of this protective sleeve. In this way, the weld and / or crimp connection is made protected against mechanical stress. Furthermore, this protective sleeve acts as vibration protection and reduces the vibrations that are introduced into the welded and / or crimped connection. The service life of the connection between the electrical conductor and the first contact part or the second contact part is thus increased considerably. The connection of the protective sleeve to the first contact part or the second contact part can be implemented, for example, via a circumferential groove introduced in the first contact part or the second contact part and a circumferential collar formed on the protective sleeve and extending inwards. The connection to the insulation sleeve can be implemented, for example, by means of a clamp connection, the protective sleeve in the region of the insulation sleeve having, for example, one or more inwardly extending material projections which cause the insulation sleeve to be deformed elastically, as a result of which a clamp connection is produced.

In a further preferred embodiment, the device according to the invention has an electrically conductive cell connector, the first contacting part or the second contacting part being connected to the cell connector by means of a welded connection. The welded connection between the cell connector and the first contacting part or the second contacting part is preferably an ultrasonic welded connection.

Preferably, an assembly comprising the fastening sleeve, the protective sleeve coupled to the fastening sleeve and the spring element is freely rotatable relative to an assembly comprising the first or second contacting part, the protective sleeve connected to the first or second contacting part and the electrical conductor. As a result, the outlet of the electrical conductor can be individually selected over 360 degrees. Thus, the electrical conductor can first be laid and welded and / or crimped before the fastening sleeve and the fixing device are clamped.

The object on which the invention is based is further achieved by an electrical energy store of the type mentioned at the outset, the one or more devices for producing an electrically conductive connection of the electrical energy store according to the invention according to one of the above described embodiments are formed. With regard to the advantages and modifications of the electrical energy store according to the invention, reference is made to the advantages and modifications of the device according to the invention for producing an electrically conductive connection. The object on which the invention is based is further achieved by a vehicle of the type mentioned at the outset, the electrical energy store of the vehicle according to the invention being designed in accordance with one of the embodiments described above. With regard to the advantages and modifications of the vehicle according to the invention, the advantages and modifications of the electrical energy store according to the invention or the advantages and

Modifications of the device according to the invention for establishing an electrically conductive connection.

Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. Show:

Figure 1 shows an embodiment of the device according to the invention in a side sectional view.

Fig. 2 shows the device shown in Fig. 1 in another

 Section; and FIG. 3 shows a fastening sleeve of a device according to the invention in a

 Side view.

1 and 2, the device 10 for establishing an electrically conductive connection has a first elongated contacting part 12 and a second elongated contacting part 18, wherein in the illustrated state there is still no electrically conductive connection between the first contacting part 12 and the second contacting part 18 is made.

The first contact part 12 extends along a longitudinal axis 14 and has a contact section 16. The second contacting part 18 likewise extends along a longitudinal axis 20 and also has a contacting section 22. The longitudinal axes 14, 20, along which the first contacting part 12 and the second Contact part 18 extend, are aligned with each other. The first contacting part 12 and the second contacting part 18 can be brought into a contact state via an axial movement of the first contacting part 12 and / or the second contacting part 18, in which the contacting section 16 of the first contacting part 12 and the contacting section 22 of the second contacting part 18 are electrically conductive with one another Are in contact.

The first contacting part 12 has a flat connecting section 66 on the side facing away from the second contacting part 18, the first contacting part 12 having a cylindrical basic shape with a circular cross section on the side facing the second contacting part 18. In the region of the end face facing the second contact part 18, the first contact part 12 has a frustoconical material section, an electrically non-conductive cap 68 being arranged at the tip of the end face facing the second contact part 18. The first contacting part 12 is accordingly designed as a male contacting part, the end face of the first contacting part 12 facing the second contacting part 18 being able to be received by an end-side recess of the second contacting part 18. Accordingly, the second contacting part 18 is designed as a female contacting part. Thus, the contacting section 16 of the first contacting part 12 is arranged on an end face of the first contacting part 12 and the contacting section 22 of the second contacting part 18 is arranged on an end face of the second contacting part 18. If the contacting section 16 of the first contacting part 12 and the contacting section 22 of the second contacting part 18 are in electrically conductive contact with one another, there is a circumferential circular contact between the first contacting part 12 and the second contacting part 18. The second contacting part 18 also has an essentially cylindrical shape Basic shape with a circular cross-section, the diameter of the second contacting part 18 is not constant along the longitudinal axis 20.

The device 10 also has a reversible and non-destructive detachable securing device 24 designed as a bayonet catch. The securing device 24 prevents the contacting section 16 of the first contacting part 12 and of from coming out of contact in a securing state Contacting sections 22 of the second contacting part 18. For this purpose, the securing device 24 has a fastening sleeve 28 and a fixing device 30. In the secured state of the securing device 24, the fastening sleeve 28 and the fixing device 30 engage with one another in such a way that the contacting section 16 of the first contacting part 12 and the contacting section 22 of the second contacting part 18 come out of contact by an axial movement of the first contacting part 12 or the second Contact 18 is not possible. To bring about the securing state, the fastening sleeve 28 and the fixing device 30 must first be pushed into one another in the axial direction and then rotated about an axis of rotation 26. The axis of rotation 26 runs in alignment with the longitudinal axis 14 of the first contacting part 12 and in alignment with the longitudinal axis 20 of the second contacting part 18.

The fastening sleeve 28 is designed as a bayonet sleeve and has two opposite slots 32a, 32b for receiving bayonet bolts 34a, 34b. The fastening sleeve 28 has two opposite sleeve wings 38a, 38b, which are connected to one another via the sleeve base. The slots 32a, 32b are introduced into the sleeve wings 38a, 38b on the side of the fastening sleeve 28 opposite the sleeve bottom. Furthermore, the fastening sleeve 28 is pushed onto the second contacting part 18, so that the second contacting part 18 extends through a recess in the base of the sleeve. A spring element 36 designed as a plate spring is arranged between the sleeve base and an axial stop 70 of the second contacting part 18. The axial stop 70 is designed as a circumferential collar.

The fixing device 30 has a bayonet bolt 34a, 34b, which extends in the transverse direction through the first contact part 12. The bayonet bolt 34a, 34b protrudes radially from the first contact part 12 on opposite sides, so that the bolt ends protruding from the first contact part 12 can be inserted into the slots 32a, 32b of the fastening sleeve 28 designed as a bayonet sleeve.

When the securing device 24 is in the secured state, the spring element 36 generates a tensile force acting in the axial direction between the fastening sleeve 28 and the Fixing device 30, whereby disengagement of the bayonet bolt 34a, 34b and the slots 32a, 32b is prevented.

The fastening sleeve 28 also has a widening section 40, within which the sleeve wings 38a, 38b extend in sections, so that the cross section of the fastening sleeve 28 increases. When the fastening sleeve 28 is pushed onto the second contact part 18, the sleeve wings 38a, 38b are elastically deformed, so that the sleeve wings 38a, 38b can pass through the axial stop 70. After the axial stop 70 has passed the widening section 40, the fastening sleeve 28 returns to the undeformed state. The section of the fastening sleeve 28 located between the widening section 40 and the sleeve bottom is dimensioned sufficiently to accommodate the axial stop 70 and the spring element 36.

The device 10 also has a protective device 44 made of plastic and electrically non-conductive. The protective device 44 partially surrounds the first contacting part 12, the second contacting part 18 and the securing device 24 and serves as protection against contact when handling the device 10. The protective device 44 has three protective sleeves 46a-46c. The protective sleeves 46a-46c each have two sleeve parts which can be folded toward one another, so that the protective sleeves 46a-46c do not have to be pushed on. The foldability of the protective sleeves 46a-46c allows the protective sleeves 46a-46c to be attached directly to the appropriate position. To implement the foldability, the protective sleeves 46a-46c can, for example, have corresponding hinges which connect the foldable sleeve parts to one another.

The protective sleeve 46b has receiving chambers 42a, 42b which are positively coupled in the circumferential direction and in the axial direction to the fastening sleeve 28 of the securing device 24 such that the fastening sleeve 28 can be rotated relative to the first contacting part 12 and the second contacting part 18 by means of a rotary movement of the protective sleeve 46b and an axial movement of the fastening sleeve 28 is limited by the protective sleeve 46b. The first contacting part 12 is electrically conductively connected to a cell connector 62 via a welded connection 64, the welded connection being produced by ultrasound welding.

The second contacting part 18 is connected in an electrically conductive manner to a flexible electrical conductor 56 designed as a cable. The electrical conductor 56 is partially covered by an insulation sleeve 58. In the area of a contact point 60, an end section of the electrical conductor 56 that is free of insulation material is crimped to the second contact part 18. To implement a crimp connection, the second contact part 18 has a receptacle 48 for the electrical conductor 56 on the end face facing away from the first contact part 12. The receptacle 48 is designed as an end recess.

The protective sleeve 46c is connected to the second contact part 18 at a first fastening section and to the insulation sleeve 58 of the electrical conductor 56 at a second fastening section. In the area of the first fastening section, the second contact part 18 has a circumferential groove 50, into which an inwardly extending collar 52 of the protective sleeve 46c is snapped or snapped. In the area of the second fastening section, the protective sleeve 46c has a circumferential, inwardly extending material projection 54 which is clamped to the elastically deformable insulation sleeve 58 of the electrical conductor 56. The contact point 60 of the electrical conductor 56 is arranged between the first fastening section and the second fastening section. The crimp connection is mechanically protected against vibration loads by the protective sleeve 46c.

The device 10 shown can be used, for example, in an electrical energy store with a plurality of cells for storing electrical energy for contacting cells or cell groups. A corresponding electrical energy store can be used, for example, in electric or hybrid vehicles.

3 shows a further embodiment of a fastening sleeve 28. The slots 32a, 32b of the fastening sleeve 28 arranged on opposite sleeve wings 38a, 38b each have two slot sections 72a, 72b, 74a, 74b. The slot sections 72a, 72b each have a slot opening on an end face of the fastening sleeve 28 and extend substantially parallel to the axis of rotation 26 of the fastening sleeve 28. The slot sections 74a, 74b adjoin the slot sections 72a, 72b and essentially extend in FIG circumferential direction.

The slots 32a, 32b are designed to receive bayonet bolts 34a, 34b, the slot sections 72a, 72b first of all causing the bayonet bolts 34a, 34b and / or the fastening sleeve 28 to move axially and / or

Slot portions 74a, 74b require subsequent rotational movement of the bayonet bolts 34a, 34b and / or the mounting sleeve 28 to fully engage the bayonet bolts 34a, 34b.

The spreading area 40 of the fastening sleeve 28 is implemented in the illustrated embodiment by a cross-sectional jump in the area of the transition from the sleeve wings 38a, 38b to the sleeve bottom.

reference numeral

10 device

 12 first contact part

 14 longitudinal axis

 16 contacting section

 18 second contact part

 20 longitudinal axis

 22 contacting section

 24 safety device

 26 axis of rotation

 28 fastening sleeve

 30 fixing device

 32a, 32b slots

34a, 34b bayonet bolts

36 spring element

 38a, 38b sleeve wing

40 widening section

 42a, 42b receiving chambers

44 Protective device

 46a, 46b, 46c protective sleeves

48 recording

50 groove

52 collar

54 Material advantage

56 electrical conductors

58 insulation cover

60 contact point

62 cell connectors

64 welded connection

66 connecting section

68 cap

70 axial stop 72a, 72b slit sections

74a, 74b slit sections

Claims

Expectations 1. Device (10) for establishing an electrically conductive connection, with a first elongated contacting part (12) which extends along a longitudinal axis (14) and has a contacting section (16); and  a second elongated contacting part (18) which extends along a longitudinal axis (20) and has a contacting section (22); wherein the first contacting part (12) and the second contacting part (18) can be brought into a contact state via an axial movement of the first contacting part (12) and / or the second contacting part (18), in which the contacting section (16) of the first contacting part (12 ) and the contacting section (22) of the second contacting part (18) are in electrically conductive contact with one another,  characterized by a, in particular reversible and non-destructively releasable, securing device (24), which is set up to ensure that the contacting section (16) of the first contacting part (12) and the contacting section (22) of the second contacting part ( 18) to prevent. 2. Device (10) according to claim 1,  characterized in that the contacting section (16) of the first contacting part (12) is arranged on an end face of the first contacting part (12) and / or the contacting section (22) of the second contacting part (18) is arranged on an end face of the second contacting part (18). 3. Device (10) according to claim 1 or 2, characterized in that the securing device (24) is designed such that at least part of the securing device (24) is to be rotated about an axis of rotation (26) in order to bring about the securing state, the axis of rotation (26) being essentially parallel or in alignment with the longitudinal axis (14) of the first contact part (12) and / or essentially runs parallel or in alignment with the longitudinal axis (20) of the second contacting part (18). 4. Device (10) according to one of the preceding claims,  characterized in that the securing device (24) as Bayonet lock is formed. 5. Device (10) according to one of the preceding claims,  characterized in that the securing device (24) is a Fastening sleeve (28) and a fixing device (30) which are set up to be in engagement with one another in the secured state of the securing device (24) such that the contacting section (16) of the first contacting part (12) and of Contacting section (22) of the second contacting part (18) is prevented. 6. The device (10) according to claim 5,  characterized in that the fastening sleeve (28) is set up to be pushed onto the first contacting part (12) or the second contacting part (18). 7. The device (10) according to claim 5 or 6,  characterized in that the fixing device (30) is connected to the first contacting part (12) or the second contacting part (18). 8. The device (10) according to one of claims 5 to 7,  characterized in that the fastening sleeve (28) is designed as a bayonet sleeve and preferably has one or more slots (32a, 32b) for receiving one or more bayonet bolts (34a, 34b). 9. The device (10) according to one of claims 5 to 8, characterized in that the fixing device (30) has one or more bayonet bolts (34a, 34b) which can be inserted into one or more slots (32a, 32b) of a bayonet sleeve. 10. The device (10) according to one of claims 5 to 9,  characterized in that the securing device (24) has a spring element (36) which is connected to the fastening sleeve (28) or the fixing device (30) and is set up, in the securing state of the securing device (24), to exert a tensile force acting in the axial direction between the fastening sleeve (28) and the fixing device (30). 11. The device (10) according to one of claims 5 to 10,  characterized in that the fixing device (30) is connected in a stationary manner with respect to the first contacting part (12) or the second contacting part (18) to the first contacting part (12) or the second contacting part (18). 12. The device (10) according to one of claims 5 to 11,  characterized in that the fastening sleeve (28) rotates at least in sections around the first contact part (12) and / or the second contact part (18) and for establishing the safety state of the safety device (24) relative to the first contact part (12) and / or the second contact part (18) is rotatable. 13. The device (10) according to one of claims 5 to 12,  characterized in that the fastening sleeve (28) has two, preferably opposite, sleeve wings (38a, 38b) which are connected to one another via the sleeve base. 14. The device (10) according to any one of claims 5 to 13, characterized in that the fastening sleeve (28) has a widening section (40) within which one or more material sections of the fastening sleeve (28) extend outwards, so that the cross section of the fastening sleeve (28) increases 15. The device (10) according to one of the preceding claims,  characterized by an electrically non-conductive protective device (44) which at least partially surrounds the first contact part (12), the second contact part (18) and / or the securing device (24). 16. The device (10) according to claim 15,  characterized in that the protective device (44) has one or more protective sleeves (46a-46c). 17. The device (10) according to claim 16,  characterized in that a protective sleeve (46b) of the protective device (44) is coupled, in particular positively, to the fastening sleeve (28) of the securing device (24) such that the fastening sleeve (28) rotates relative to the protective sleeve (46b) first Contacting part (12) and / or the second contacting part (18) can be rotated and / or an axial movement of the fastening sleeve (28) is prevented or restricted at least in one direction by the protective sleeve (46b). 18. Device (10) according to one of the preceding claims,  characterized by an, in particular flexible, electrical conductor (56), which is partially covered by an insulation sleeve (58), the electrical connection being electrically conductive at a contact point (60) to the first contact part (12) or the second contact part (18) is. 19. The device (10) according to claim 18,  characterized in that an insulation-free end section of the electrical conductor (56) is welded and / or crimped to the first contact part (12) or the second contact part (18). 20. The device (10) according to claim 18 or 19, characterized in that a protective sleeve (46c) of the protective device (44) on a first fastening section with the first contacting part (12) or the second contacting part (18) and on a second Fastening section is connected to the insulation sleeve (58) of the electrical conductor (56), the contact point (60) of the electrical conductor (56) being arranged between the first fastening section and the second fastening section. 21. Device (10) according to one of the preceding claims,  characterized by an electrically conductive cell connector (62), the first contact part (12) or the second contact part (18) being connected to the cell connector (62) by means of a welded connection. 22. Electrical energy storage, with  one or more cells for storing electrical energy and one or more devices (10) for establishing an electrically conductive connection;  characterized in that the one or more devices (10) for producing an electrically conductive connection are designed according to one of the preceding claims. 23. Vehicle, with  - an electrical energy storage,  characterized in that the electrical energy store is designed according to claim 22.