Dense cable bushing for high voltage cables in the automotive industry.

专利摘要:
The inventive high-voltage conductor bushing is used for dense, but releasable transfer of a cross-sectionally round copper strand (5) in a flat copper conductor (1) for high voltages and large currents. The implementation has a mounting frame (16) for screwing onto a housing part (17) through which the dense, kink-resistant and temperature-resistant implementation is achieved. The cross-sectionally round copper strand (5) extends shielded and insulated by the bushing and is surrounded all around in a sealed encapsulation (12) of a thermoplastic, which also integrally forms the mounting frame (16) or expires in this. The so tightly edged and shielded copper wire (5) is inside the encapsulation (12) inserted into a cable lug (18), which surrounds him on all sides and forms a flat conductor with a transverse bore towards the rear. There, a flat copper conductor (1), which is led out of the housing, placed on this flat conductor and by means of a screw (13) firmly connected to the push-in socket conductor (19), so that a releasable electrical connection is established.
公开号:CH712454A2
申请号:CH00606/17
申请日:2017-05-07
公开日:2017-11-15
发明作者:Drawert Klaus
申请人:Satrotec Ag；
IPC主号:

专利说明:

Description [0001] This invention relates to a sealed electrical cable gland especially for the automotive sector for the safe transmission of high currents. Such compounds are primarily used in electrically powered vehicles, be it hybrid vehicles or pure electric vehicles. In such vehicles, currents must be able to flow at a voltage of 400 volts and higher and at currents of 300 amperes and more in cables and the associated cable connections for feeding the electric motors. Therefore, these cables are called high-voltage cables or, in technical terms, high-voltage cables or HVCs. They are provided internationally with an orange isolation. As a cable for the power supply, those with a large strand cross-section are used to keep resistance losses low. The strands are enclosed by an insulation and then in turn comprises a metallic protective braid. The high voltages make special shielding necessary so that other nearby electric devices are not disturbed by electric and magnetic fields. The protective braid is then bordered by a temperature-resistant orange cable insulation made of a silicone, but other materials can be considered as cable insulation in question. This cable insulation can withstand temperatures of up to 200 ° C and higher.
In the present case, it is a matter of such a compound of a round copper cable strand of, for example, 50 mm 2 cross-sectional area with a flat copper conductor of about 4 mm thickness and 16 mm width for a passage in a housing which contains an electrical component, such as a battery, an electric motor or an electronic power carrier. The stated dimensions are expressly to be understood as an example only and in practice may deviate from these values. Such connections and feedthroughs are known in principle. The copper strand is covered with one or more electrical insulation layers, and then followed by a shield. The actual electrical connection is made by a cable lug is slipped over the copper wire in the form of a plug-in sleeve, so that the copper wire is on all sides a bit intimately encompassed. The plug-in sleeve goes in one piece into a flat piece, which has a transverse bore. The flat conductor to be connected therewith, likewise with a transverse bore in the end region, is overlapped on this transverse bore and then a screwed connection follows. This entire compound is wrapped in an insulation, on which a compression sleeve comes, and at the end of the entire compound is sealingly encapsulated with a thermoplastic. This encapsulation forms a mounting frame for screwing onto a housing wall with breakthrough, from which the bare flat conductor is led out from behind. On the opposite side of the connection, the round copper strand emerges from the connection area or from the encapsulation and the insulation. The disadvantage of this design of the implementation and connection proves that the screw is closed by the component cover or the housing and so is not accessible later, because it is located inside the housing on which the screwed mounting frame sits.
These compounds are exposed to extreme loads in a vehicle. In vehicle operation, due to the effects of the weather, large temperature differences and large fluctuations in the air humidity occur, which can clog the connection. In addition, vehicles are sometimes sprayed with hot steam, and the conductor connections must therefore also withstand such hot steam and remain tight. In addition there is the aging process, which also adds to the bushings.
The task of this dense cable bushing for high voltage cable in the automotive industry is to create a connection of both conductors by means of a screw, which causes a permanent and constant surface pressure of the contact surfaces. Loosening and connecting should be possible outside of the passage through a housing wall, so that the housing can always remain closed. The cable feedthrough should be dismantled and disconnected and rebuilt more than 100 times without damage. It should have the simplest possible and robust construction, be insensitive to vibration and shock, and be able to withstand high and low temperatures without time-consuming special parts. All in all, they should have a high level of security against water ingress and their inner structure should be completely enclosed with a continuous plastic sheath. The shielding should be completely closed and this cable bushing should be compatible with the standard LV 215-1 of the German automobile manufacturers (AK 4.3.3).
The object of the present invention is therefore to make a cable bushing for at least one round Kupferkabellitze to a flat copper conductor so that the connection outside the housing, on which the implementation is mounted by means of a mounting frame, is separable, and wherein this cable feedthrough to meet all the above requirements.
This object is achieved by a high-voltage conductor bushing with a aufzuschraubenden on a housing with breakthrough mounting frame for dense, kink-resistant and temperature-resistant implementation of a round cross-section copper wire and connection to a flat, exiting the housing copper conductor for the electrical component in the housing , wherein the copper strand is shielded and insulated by the implementation and is surrounded by a sealed encapsulation which leaks and integrally terminates in the mounting frame, which is screwed to the housing, this high-voltage conductor bushing is characterized in that the so edged edged and shielded copper strand is inserted outside the housing and mounting frame and within its encapsulation in a cable lug in the form of a plug-in sleeve, which surrounds them on all sides, and that the cable lug at the other, free end in a flat Le Iter is formed with transverse bore, so that a fla- more ladder is placed on him and is connected by means of a guided from one side into the encapsulation screw firmly connected to the cable lug, so that a detachable electrical connection is created, with a sealing and Abschirmpfropfen in the Encapsulation sealing the hole for the screw sealing.
In the figures, a conventional implementation and connection of a round copper strand is first shown with a flat copper conductor and afterwards the modified implementation and connection, which remains separable outside the supplied housing.
It shows:
Fig. 1 The conventional implementation in a perspective view with three strands, wherein the mounting frame can be placed on a housing;
Fig. 2: The conventional implementation of Figure 1 in a plan view.
Fig. 3: The conventional implementation of Figures 1 and 2 placed in a longitudinal section along a round wire is.
Fig. 4: The inventive implementation in a perspective view with three flat conductors on the back direct end;
Fig. 5: The implementation of Figure 4 in a plan view.
Fig. 6: The implementation of Figures 3 and 4 shown in a longitudinal section along a round wire.
Fig. 7 An inventive implementation with a sliding sleeve for the flat cable;
Fig. 8 shows the sliding sleeve in the platen, with the flat cable enclosed therein, in condition for transportation;
Fig. 9 The end cap for the front side of the flat cable;
Fig. 10 The separate implementation, so separated with the flat cable from the round strand.
Fig. 1 shows a first conventional implementation. A mounting frame 37 serves to place the bushing on a housing 38, of which only a section is shown here, and which there has an opening, which is encompassed by the mounting frame 37 and is connected by means of screws 33 sealingly connected to the housing part 38. In the example shown, this passage includes three stranded in cross-section strands 25, which are each enclosed here by a cone-shaped extrusion coating 32, which terminates in one piece against the housing in the mounting frame 37. Three strands 25 are necessary if, for example, a three-phase motor must be supplied in the housing. It may, however, also entrances with only one strand occur, then at least two such are installed, or bushings with two strands, such as batteries or electronic power carrier inside the housing. These three strands 25 in the example shown, that is to say the three copper strands 25 which are round in cross-section, have a cross-sectional area of 50 mm 2 each and they are surrounded by an inner cable insulation and outer cable insulation. The mechanical and electrical connections with the rear, behind the housing cutout 38 emerging flat copper conductors 1, for example, 4 mm thick and 15 mm wide located behind the housing plate 38 in the form of cross-threaded screws 34. If this implementation is once installed on a housing , so these compounds can only be solved by access to the interior of the housing, such as by removing a removable housing cover. Often, however, these glands remain difficult to access.
In Fig. 2, this implementation is shown in a plan view. Here you can see the on the right side of the housing part 38 out of the lead out flat copper strands 1, which lead into the interior of the housing, and the screw 34. The there emerging from the housing part 38 round copper strands 25 stuck in cable lugs 36, the towards the right, that is towards the inside of the housing out, are each formed in a flat conductor and then bolted to the flat electrical conductors 1 by overlapping with them. The mounting frame 37 is formed by the encapsulation 32, that is, this runs in one piece in the mounting frame 37, which is screwed with the screws 33 sealingly on the housing part 38 to the breakthrough. Inside the encapsulation 32, the round copper strand 25 extending therein is each equipped with an inner and outer cable insulation, and also provided with a shield, which encloses the entire insulation.
More can be seen with reference to FIG. 3, which shows a longitudinal section of the cable bushing along a round strand 25. The round copper wire 25 is inserted here in a cable lug 36, which forms a plug-in sleeve and is formed into a flat end 39. About this end 39, the flat copper wire 1 is placed from the other side to the flat end of the socket and both have a transverse bore 21, in which the screw 34 of the dimension M6x16 inserted with its lock nut 32. On the round copper strand 25 left in the picture left of the housing part 38 can be seen first the inner cable insulation 29, followed by a shield 26, and then the outer cable insulation 30. To the outer
Cable insulation can be seen a strain relief 31. About this and the entire cable gland an encapsulation 32 is applied, which closes everything against the inside tight. In the picture on the right side, the flat copper wire 1 is led into the housing interior. In this conventional or conventional cable gland, the screw is always inside the housing equipped with it.
In contrast, the inventive cable bushing as shown in Fig. 4 is constructed. Already in this perspective view, it can be seen that a sealing and shielding plug 14 is provided at the encapsulations 12 on the left side of the image at each connection. Otherwise, the cable bushing looks exactly the same as the one in Fig. 1 here. Guns, that is to say on the right side of the picture, are led out of the three flat copper strands 1, which, however, are not visible here. The screw connection between the round copper strand 5 and the flat conductor 1 is a special feature in the interior of the encapsulation 12. Thus, the connection can be opened at any time outside the component or outside the housing equipped therewith, which results in a significant advantage.
Fig. 5 shows this cable gland for three strands 5 in a plan view. It can be seen here the flat copper strands 1 right of the housing part 17, as they lead to the right into the interior of the housing. They are for example 4 mm x 18 mm thick. The connecting screws for intimate connection with the coming from the right round copper strand 5 is located inside the encapsulation 12 and these compounds are each solved with a cable lug, which forms a plug-in sleeve and is formed on the other side in a flat conductor with a transverse bore.
Further information about the internal construction of this implementation is the Fig. 6, which shows a longitudinal section through the passage along the axis of a round copper strand 5. It can be seen how the copper strand is pushed 5 round cross-section in the cable lug 18, the plug-in sleeve surrounds them all around and intimately and provides a large contact surface. This cable lug 18 is formed in the image to the right or against the housing in a flat strand 19. This lies here on the side of the leading flat copper strand 1 at. Both are provided with a transverse bore 22 through which a connecting screw 13 leads. The hole in the encapsulation 12 for the screw 13 is sealed with a sealing and shield plug 14.
The round copper strand 5 is passed through about half of the entire implementation. Inside it is on the left in the picture initially surrounded by an inner cable insulation 9. Radially outward follows a cable screen 20 for the shield, in the form of a braid. Around this, the outer insulation 10 can be seen. On the right in the drawing half of the implementation can be seen around the ladder 5.1 around an inner insulation 2, and around this a compression sleeve 8 made of metal as a shield. This is followed by the inner sleeve 7 for the screen pressing. Between the inner sleeve 7 and the compression sleeve 8 is the cable shield 20 which is crimped around 360 ° between the two sleeves 7, 8. On the left, in the front area, you can see the strain relief 11, and this is enclosed together with the shielding 3 of an encapsulation 12. This encapsulation 12 extends from the front of the outer cable insulation 10 to and with towards the mounting frame 16, which is part of the encapsulation 12. The mounting frame 16 is sealingly on the provided with an opening 21 housing part 17 and is clamped by means of screws 15 with this housing part 17. The transition to the housing part 17 is sealed with an elastomer seal 4 and vorderst a weed spring 3 is used for the shield connection to the housing 17.
Fig. 7 shows a further variant in the connected state of the flat cable 1. This is here in a sliding sleeve 40, which terminates in a tapered extension 41, from which the flat cable 1 protrudes with its transverse bore. The compression sleeve for the shield is sealed to the mounting or support plate 16 in its interior with a Rundschnurfeder 42. The sliding sleeve 40 forms on the outside of the support plate 16 a projection, which is designated here by 43. As a special feature, the flat cable 1 as shown in Fig. 8 front equipped with a plug-in or clip-end cap 44, so that the free end of the flat cable 1 is protected for transport purposes from injury or damage and from accidental contact. The flat cable 1 is completely enclosed in the sliding sleeve 40 in this state and includes on all sides, including the entire front free end. Fig. 9 shows the end cap 44 separately and shown separately from the front free end of the flat cable 1. It can be equipped as in the example shown with two pins 45 so that they can be inserted or clipped into corresponding holes 46 in the end face of the flat cable 1. Finally, FIG. 10 shows the situation with the plug pulled away. The sliding sleeve 40 is pulled by driving cam 47 until it engages over the flat cable 1.
The cable insulation consists of up to 200 ° C temperature-resistant silicone and stuck about 30 mm wide in the encapsulation 12 of the implementation. This high-voltage cable gland can even be exposed to a hot steam jet and still remains tight, as if compressed air is injected from one side. This is a prerequisite for fulfilling the standard DIN 40 050IP69K. This cable gland makes it possible to loosen and recreate the gland at any time outside a housing equipped with it, which is more than a hundred times possible without compromising the quality of the electrical and mechanical connection. The connection of both conductors 1.5 by means of screws ensures a permanently constant surface pressure of the contact surfaces. The loosening and reconnecting is possible within the implementation, wherein the housing to be connected remains closed. This implementation is also simpler and more robust in construction than conventional. It is resistant to vibrations and shocks and can withstand high and low temperatures, in a temperature range of -40 ° C to +150 ° C permanently, in the short term even higher, and without elaborate special parts. It also offers a high level of protection against water ingress. The inner structure is completely enclosed by a continuous plastic sheath. Nevertheless, the implementation is absolutely tight and highly stable and kink resistant. This cable gland further provides a completely closed shielding. The connection is made by the customer via a corrugated spring and the strain relief is integrated in the encapsulation. The cable gland is compatible with LV 215-1 of the German automobile manufacturers (AK 4.3.3).
Digit guide [0018] Customer-supplied flat conductor 2 Insulation inside 3 Wave spring for shield connection to the customer-supplied housing 4 Elastomer seal 5 Copper strand 50 mm2 6 Shielding copper strand 7 Shroud compression sleeve 8 Sheath for shielding 9 Cable insulation inside 10 Cable insulation outside 11 Strain relief 12 Encapsulation 13 Screw M6x8 ISO 7380 14 M14x1.5 sealing and shielding plugs 15 M6x12 bolt ISO 4762 16 Mounting frame 17 Platen 18 Plug-in sleeve 19 Flat end of plug-on socket 18 20 Cable shield 21 Opening in housing part 22 Cross hole in strand 1 and socket end 23 Wave spring for shield connection to customer-supplied housing 24 Elastomer seal 25 Copper strand 50 mm2 26 Shielding Copper strand 27 Inner compression sleeve for shielding 28 Compression sleeve outer for shielding 29 Inner cable insulation 30 External cable insulation 31 Strain relief 32 Encapsulation 33 M6x8 screw ISO 7380

权利要求:
Claims (7)
[1]
Cross connecting bolt 35 Screw head Cross connecting bolt 36 Push - in sleeve 37 Mounting frame 38 Platen 39 Flat end 40 Sliding sleeve 41 Extension on sliding sleeve 42 O - ring spring (shield connection to customer supplied housing) 43 Projection overhang 44 End cap 45 Pin on end cap 46 Holes in front of free end of Flat cable 1 47 drive cam on the sliding sleeve claims
1. High-voltage conductor bushing with a housing (17) with breakthrough (21) aufzuschraubenden mounting frame (16) for dense, kink-resistant and temperature-resistant implementation of a round cross-section copper wire (5) and connection to a flat, emerging from the housing copper conductor ( 1) for the electrical component in the housing, wherein the copper strand (5) is shielded and insulated by the implementation and is surrounded by a sealed encapsulation (12), which sealingly and integrally in the mounting frame (16) expires, which with the housing (17) can be screwed, characterized in that the so tightly edged and shielded copper strand (5) outside the housing (17) and mounting frame (16) and within its encapsulation (12) in a cable lug (18) is inserted in the form of a plug-in sleeve , which surrounds them on all sides, and that the cable lug (18) at the other end in a flat conductor (19) with a transverse bore (22) is formed so that a flat conductor (1) can be placed on it and by means of a guided from one side into the encapsulation (12) screw (13) is firmly connected to the cable lug (18), so that creates a detachable electrical connection is, wherein a sealing and Abschirmpropfen (14) in the encapsulation (12) sealingly closes the hole for the screw (13).
[2]
2. High-voltage conductor bushing according to claim 1, characterized in that the copper strand (5) is pushed round cross-section in a cable lug (18), the plug-in sleeve surrounds them all around and intimately, and that the cable lug (18) against the housing out in a flat stranded wire (19) with transverse bore (22) is formed, wherein the strand to be led into the housing (1) is provided with a transverse bore and with the flat wire (19) on the cable lug (18) with a connecting screw (13) can be clamped , wherein the hole in the encapsulation (12) for the connecting screw (13) with a sealing and Schirmpropfen (14) is sealingly closed.
[3]
3. High-voltage conductor bushing according to one of the preceding claims, characterized in that the round copper strand (5) is guided over about half of the entire implementation and in the interior of the encapsulation (12) by an inner cable insulation (9) is enclosed, and radially around the outside a cable screen (20) follows the shield in the form of a braid, and therearound an outer insulation (10) follows, and that after transition to the flat strand (1) an inner insulation (2) follows, and around this Pressing sleeve (8) made of metal as a shield and above an inner sleeve (7) for the screen pressing, wherein between the inner sleeve (7) and the compression sleeve (8) of the cable shield 20 extends by 360 ° around gekimmt.
[4]
4. High-voltage conductor bushing according to one of the preceding claims, characterized in that in the front region of the copper wire (5), a strain relief (11) is arranged, and this, together with the shield (3) by an encapsulation (12) is enclosed, the from the front of the outer cable insulation (10) up to the Aufsetzrahmen (16) and partially extending into this.
[5]
5. High-voltage conductor bushing according to one of the preceding claims, characterized in that the encapsulation (12) consists of thermoplastic material, and the outer cable insulation (10) is sealingly connected to the mounting plate (16).
[6]
6. High-voltage conductor bushing according to one of the preceding claims, characterized in that the flat cable (1) in a sliding sleeve (40) inserted, which encloses the flat cable (1) on all sides, wherein at the free end of the flat cable (1) has an end cap (44 ) can be plugged.
[7]
7. High-voltage conductor bushing according to claim 6, characterized in that the flat cable (1) on its front side with an end cap (44) can be covered by the end cap (44) with pins (45) are formed, which in associated holes ( 46) in the front side of the flat cable (1) can be inserted or clipped.

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同族专利:

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公开号 | 公开日

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CH712447A2|2017-11-15|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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DE102021005627A1|2021-11-12|2021-12-23|Daimler Ag|Screw connection|

法律状态:
2020-07-31| AZW| Rejection (application)|

优先权:

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申请号 | 申请日 | 专利标题

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CH00611/16A|CH712447A2|2016-05-11|2016-05-11|Dense cable bushing for high voltage cables in the automotive industry.|

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