EP0882317A1 - Vehicle battery cable clamp - Google Patents

Vehicle battery cable clamp

Info

Publication number
EP0882317A1
EP0882317A1 EP97903340A EP97903340A EP0882317A1 EP 0882317 A1 EP0882317 A1 EP 0882317A1 EP 97903340 A EP97903340 A EP 97903340A EP 97903340 A EP97903340 A EP 97903340A EP 0882317 A1 EP0882317 A1 EP 0882317A1
Authority
EP
European Patent Office
Prior art keywords
cable clamp
battery cable
force
battery
clamp according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97903340A
Other languages
German (de)
French (fr)
Other versions
EP0882317B1 (en
Inventor
Robert Albiez
Maximilian Gröbmair
Alfred Krappel
Günther Nölle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Auto Kabel Hausen GmnH and Co Betriebs KG
Original Assignee
Bayerische Motoren Werke AG
Auto Kabel Hausen GmnH and Co Betriebs KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG, Auto Kabel Hausen GmnH and Co Betriebs KG filed Critical Bayerische Motoren Werke AG
Publication of EP0882317A1 publication Critical patent/EP0882317A1/en
Application granted granted Critical
Publication of EP0882317B1 publication Critical patent/EP0882317B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/287—Intermediate parts between battery post and cable end piece
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H2001/5877—Electric connections to or between contacts; Terminals with provisions for direct mounting on a battery pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H2039/008—Switching devices actuated by an explosion produced within the device and initiated by an electric current using the switch for a battery cutoff

Definitions

  • the invention relates to a battery cable clamp with the features of the preamble of claim 1 and a method for producing such a cable clamp.
  • Such a cable clamp and a method for its production is known from WO 95/21454 A.
  • the two clamping parts have a cylindrical surface.
  • This has various disadvantages.
  • the contact force depends on the manufacturing tolerances of the two clamping parts and cannot be exactly defined.
  • the auxiliary drive usually is carried out with the aid of a detonator capsule, this results in a relatively high explosiveness of the detonator capsule with the problem of reliably precluding a human health hazard in the event of a false triggering, for example in the event of a repair in the engine compartment.
  • the invention has for its object to provide a battery cable clamp of the type mentioned, in which the two clamping parts are separated from one another in a defined manner and with a minimal squeezing force of the auxiliary drive, and also to provide a method in which these effects can be represented with little manufacturing effort.
  • the invention solves this problem for the battery cable clamp of the initially mentioned type with the features of the characterizing part of claim 1 and for the manufacturing method with the features of the characterizing part of claim 9.
  • cone cone seat
  • a conical seat is problem-free in terms of production technology, since any manufacturing tolerances due to the surface structure are largely compensated for.
  • the clamping force can be monitored in a simple manner during the entire joining process and thus the breakaway force can also be set in a defined ratio to the maximum clamping force.
  • the breakaway force is usually generated with the help of an explosive. Its amount can be relatively small since it is only necessary to overcome the breakaway force. Due to the resulting relative movement, the contact separation is ensured quickly and safely.
  • the two cone angles can thus be designed almost identically. In contrast to a relative difference between the two cone angles, this results in a contact surface between the two Clamping parts which are provided over the entire surface which is connected to one another.
  • the contact surfaces can additionally be surface-treated, for example surface-finished by tinning and / or glued to one another.
  • the adhesive can be such that it only becomes effective during the joining process.
  • the adhesive strength can also depend on the press-in force. This results in a clamping connection of the two clamping parts that is stable over the long term and practically does not change in its squeezing force over the entire running time.
  • the recoil force can be directed past the battery pole, for example at an oblique angle to the direction of exit of the cable clamp.
  • the clamping parts can be provided with an insulating protective covering. This serves in particular for electrical insulation. It can also serve to keep the two clamping parts at a defined distance from one another after their separation.
  • the casing can be open in the direction of movement of the one clamping part.
  • it can have locking means for the clamping part removed from the other clamping part. This locking means on the one hand limits the movement of the clamping part and prevents it from approaching again and thus preventing the two clamping parts from making contact.
  • FIG. 1 shows a first structural embodiment of the invention in side view (a) and top view (b),
  • FIG. 2 shows an alternative to the embodiment of FIG. 1 also in side view and top view
  • FIG. 4 shows the clamp connection of FIG. 3 in the assembled state
  • FIG. 5 shows the clamp connection of FIGS. 3 and 4 in the separated state
  • 6 shows a perspective illustration of a further embodiment of the invention
  • FIG. 7 is a sectional view of the embodiment of FIG. 6 with the clamp connection closed
  • Fig. 8 shows the clamp connection of Fig. 7 in the separated state
  • FIG. 9 shows an alternative to the clamp connection from FIG. 7.
  • SBK 1 shows a battery cable clamp (hereinafter referred to as SBK) 1, which is essentially used from a known version of a clamp 8 for fastening to a battery pole 8 ' .
  • the SBK 1 also has two clamping parts 2 and 4, which are held in an electrically conductive connection by a press fit on their contact surface 7.
  • An auxiliary drive in the form of a detonator capsule 3 is also provided, which is held in the clamping part 2.
  • the clamping part 4 is connected to a battery line 5.
  • the outgoing direction of the battery cable 5 is parallel and in alignment with the outgoing direction of the battery terminal 8 from the battery pole 8 ' .
  • parts with the same function are provided with the same reference symbols as in FIG. 1.
  • the embodiments of FIG. 1 and FIG. 2 have in common that when the auxiliary drive (detonator capsule 3) becomes effective, the recoil force on the stationary clamp 2 that occurs when the battery cable 5 moves in the direction of the arrow is directed past the battery terminal 8. As a result, there is no damage to the battery pole 8 ' and thus to the connected vehicle battery.
  • the conicity of the clamping part 4 and the corresponding expression of the contact surface in the clamping part 2 as a conical seat are essential for the invention.
  • the cone angles 10a of the two electrically connected contact surfaces are approximately the same and have a value of max. 5, here preferably represents approximately 2.5 °. This creates a self-locking in the manufacture of the Clamping connection reached the two clamping parts 2 and 4.
  • the clamping part 4 is pressed into the clamping part 2 in a force-controlled manner with a value of, for example, 3500 N. Manufacturing tolerances are largely compensated in this way. It is important that the manufacturing process itself ensures the parallelism between the cone angle 10 and the cone angle 10a.
  • the squeezing force is higher, for example, by a factor of 1.1 to 1.3 than the squeezing force. This calculable squeezing force is important for the dimensioning of the explosive force of the detonator capsule 3.
  • the surface of the clamping part 4 and / or the surface of the cone in the clamping part 2 is e.g. finished with tin (11).
  • the tin surface has the property that during the joining process the tin flows into any grooves, reefs, depressions and angular deviations caused by production and is cold welded on site. In this way, a positive, gas-tight connection 12 (FIG. 4) can be produced over the entire cone / cone surface.
  • adhesive which is applied, for example, as an adhesive ring 25 to the clamping part 4.
  • adhesive materials are used which only harden under pressure, that is to say during and after production of the press fit.
  • Any holding force can be set by a suitable choice of the adhesive material.
  • the holding force of the glue point is set so that the total force from the holding force of the press fit and the holding force of the glue point is still below the force that is applied with the detonator capsule 3 when it is triggered.
  • the detonator capsule 3 In the triggered state, the detonator capsule 3 generates a gas which enters the fore-volume 6 and generates an extrusion force for the clamping part 4. This is pressed out of its press fit and, for example, assumes the position shown in FIG. 5. In this the electrical connection between the clamping parts 2 and 4 is interrupted. Due to the conical seat, the clamping part 4 is ejected with moderate dynamics. This is justified by the fact that a very large air gap 17 is generated after the cone connection has been broken loose for the first time. which leads to the instantaneous pressure drop and thus does not accelerate the battery line 5 very much. Furthermore, the recoil force on the battery pole 8 'is low in the event of tripping. Damage to the battery pole 8 ′ which impairs the function can thus be avoided.
  • the clamping part 2 with the pressed-in clamping part 4 is clipped into a plastic part 18 (FIG. 6), which fulfills two functions:
  • the plastic part 18 also fulfills the function of a touch guard.
  • the clamping part 4 moves under the action of the gas developed in the detonator 3 to the right in FIG. 7 until a collar 4 'of the clamping part 4 strikes the rear end of the plastic part 18. This takes place after covering the path 19.
  • the detonator 3 is expediently fired with the aid of an airbag control device (not shown) or another suitable trigger control (for example short-circuit current measurement).
  • the locking elements 20 take effect and prevent the clamping part 4 from moving again in the direction of the clamping part 2.
  • the connection between the battery cable 5 and the battery pole 8 ' is thus permanently interrupted.
  • the plastic part 18 ' is provided with a predetermined breaking point 22 and locked with the clamping part 2 via circumferential ring grooves 23.
  • the plastic part 18 ' detaches at the predetermined breaking point 22 and the battery cable with the clamping part 4 falls off. This prevents contact being made again.
  • Installation geometries can require that the separating mechanism (detonator capsule 3 and conical seat 10/11) is not attached directly to the battery terminal 8, but that it is part of the battery cable. This results in universal applications.
  • the Kiemmteil 2 is not connected to the battery terminal 8, but also designed as a line connector.

Abstract

The invention concerns a vehicle battery cable clamp comprising a securing device for a cable end piece, in which device two clamping parts are interconnected in an electrically conductive manner by means of a pressure connection which can be separated by high separating force via an auxiliary drive. According to the invention, the pressure connection is produced via a conical contact surface.

Description

Batterie-Kabelklemme für FahrzeugeBattery cable clamp for vehicles
Die Erfindung bezieht sich auf eine Batterie-Kabelklemme mit den Merkmalen des Oberbegriffs vom Patentanspruch 1 sowie ein Verfahren zur Herstellung einer der¬ artigen Kabelklemme.The invention relates to a battery cable clamp with the features of the preamble of claim 1 and a method for producing such a cable clamp.
Eine derartige Kabelklemme und ein Verfahren zu ihrer Herstellung ist aus der WO 95/21454 A bekannt. Dabei besitzen die beiden Klemmteile eine zylindrische Oberfläche. Daraus ergeben sich verschiedene Nachteile. Zum einen ist die Kon¬ taktkraft von den Herstellungstoleranzen der beiden Klemmteile abhängig und nicht exakt definierbar. Daraus ergibt sich der Nachteil, den Hilfsantrieb so zu dimensio- πieren, daß unter extremen Bedingungen eine ausreichende Wirksamkeit gegeben ist. Da der Hilfsantrieb i.d.R. mit Hilfe einer Sprengkapsel ausgeführt wird, ergibt sich daraus eine relativ große Brisanz der Sprengkapsel mit dem Problem, bei ei¬ ner evtl. Fehlauslösung, beispielsweise bei einer Reparatur im Motorraum, eine Gesundheitsgefährdung eines Menschen sicher auszuschließen. Daraus ergibt sich ein erheblicher Aufwand für beispielsweise eine Schutzumhüllung sowie ein relativ großes damit verbundenes Zusatzgewicht der gesamten Kabelklemme.Such a cable clamp and a method for its production is known from WO 95/21454 A. The two clamping parts have a cylindrical surface. This has various disadvantages. On the one hand, the contact force depends on the manufacturing tolerances of the two clamping parts and cannot be exactly defined. This results in the disadvantage of dimensioning the auxiliary drive in such a way that it is sufficiently effective under extreme conditions. As the auxiliary drive usually is carried out with the aid of a detonator capsule, this results in a relatively high explosiveness of the detonator capsule with the problem of reliably precluding a human health hazard in the event of a false triggering, for example in the event of a repair in the engine compartment. This results in a considerable effort for, for example, a protective sheath and a relatively large additional weight associated with it for the entire cable clamp.
Auch die Wirksamkeit einer Kabelklemme mit zylindrischen Kontaktflächen der Klemmteile ist insoweit problematisch, als die Trennung der beiden Klemmteile erst nach Zurücklegen eines nicht unerheblichen Distanzweges erfolgt. Verwendet man als Hilfsantrieb wie ausgeführt eine Sprengladung, so ist deren Wirkung durch die sich bei Zünden der Sprengkapsel ergebenden Gasmenge bestimmt. Für das Ent¬ fernen der beiden Klemmteile voneinander ergibt sich ein Gasvolumen, das dem Distanzweg proportional ist. Da das Gasvolumen sowohl die Losbrechkräfte der Klemmverbindung als auch die Relativbewegung der beiden Klemmteile voneinan¬ der ausführen muß, ergibt sich daraus wiederum eine erhebliche Menge an Sprengstoff mit den sich daraus ergebenden, bereits geschilderten erheblichen Nachteilen.The effectiveness of a cable clamp with cylindrical contact surfaces of the clamping parts is also problematic insofar as the two clamping parts are only separated after a not inconsiderable distance has been covered. If, as stated, an explosive charge is used as the auxiliary drive, its effect is determined by the amount of gas which results when the detonator is ignited. For the removal of the two clamping parts from one another, a gas volume results which is proportional to the distance. Since the gas volume both the breakaway forces of the Clamping connection as well as the relative movement of the two clamping parts from each other, this in turn results in a considerable amount of explosives with the resulting considerable disadvantages already described.
Der Erfindung liegt die Aufgabe zugrunde, eine Batterie-Kabelklemme der ein¬ gangs genannten Art zu schaffen, bei der die Trennung der beiden Klemmteile voneinander in definierter Weise und mit einer minimalen Auspreßkraft des Hilfsan¬ triebs erfolgt und ferner ein Verfahren zu schaffen, bei dem sich diese Wirkungen mit geringem fertigungstechnischen Aufwand darstellen lassen.The invention has for its object to provide a battery cable clamp of the type mentioned, in which the two clamping parts are separated from one another in a defined manner and with a minimal squeezing force of the auxiliary drive, and also to provide a method in which these effects can be represented with little manufacturing effort.
Die Erfindung löst diese Aufgabe für die Batterie-Kabelklemme der eingangs ge¬ nannten Art mit den Merkmalen des Kennzeichenteils vom Patentanspruchs 1 und für das Fertigungsverfahren mit den Merkmalen des Kennzeichenteils vom Patent- anspruch 9.The invention solves this problem for the battery cable clamp of the initially mentioned type with the features of the characterizing part of claim 1 and for the manufacturing method with the features of the characterizing part of claim 9.
Die Verwendung eines Konus (Kegelsitzes) ergibt durch die Konusselbsthemmung eine definierte Haltekraft der beiden Klemmteile und bereits bei einer minimalen Relativbewegung der beiden Klemmteile eine Kontakttrennung, sofern eine Wand- berührung vermieden wird. Ein Kegelsitz seinerseits ist fertigungstechnisch pro¬ blemlos, da evtl. Fertigungstoleranzen bedingt durch die Oberflächenstruktur weit¬ gehend ausgeglichen werden. Zudem läßt sich die Klemmkraft auf einfache Weise während des gesamten Fügeverfahrens überwachen und damit auch die Los¬ brechkraft in einem definierten Verhältnis zur maximalen Klemmkraft einstellen.The use of a cone (cone seat) results in a defined holding force of the two clamping parts due to the conical self-locking and a contact separation even with a minimal relative movement of the two clamping parts, provided that contact with the wall is avoided. For its part, a conical seat is problem-free in terms of production technology, since any manufacturing tolerances due to the surface structure are largely compensated for. In addition, the clamping force can be monitored in a simple manner during the entire joining process and thus the breakaway force can also be set in a defined ratio to the maximum clamping force.
Die Losbrechkraft wird i.d.R. mit Hilfe eines Sprengstoffs erzeugt. Dessen Menge kann relativ gering sein, da es lediglich erforderiich ist, die Losbrechkraft zu über¬ winden. Aufgrund der sich dabei ergebenden Relativbewegung ist schnell und si¬ cher die Kontakttrennung gewährleistet.The breakaway force is usually generated with the help of an explosive. Its amount can be relatively small since it is only necessary to overcome the breakaway force. Due to the resulting relative movement, the contact separation is ensured quickly and safely.
Eine optimale Steuerung der Kontaktkraft und der Losbrechkraft läßt sich durch eine Anzahl verschiedener Maßnahmen erreichen. So können die beiden Kegel¬ winkel nahezu identisch ausgebildet sein. Im Gegensatz zu einer relativen Diffe¬ renz der beiden Kegelwinkel ergibt sich damit eine Kontaktfläche der beiden Klemmteile, die über deren gesamte miteinander in Verbindung stehende Oberflä¬ che gegeben ist. Die Kontaktflächen können zusätzlich oberflächenbehandelt, bei¬ spielsweise durch Verzinnen oberflächenveredelt und/oder miteinander verklebt sein. Der Kleber kann so beschaffen sein, daß er erst während des Fügevorgangs wirksam wird. Die Klebkraft kann zusätzlich von der Einpreßkraft abhängig sein. Damit ergibt sich eine langzeitstabile und praktisch über die gesamte Laufzeit sich in ihrer Auspreßkraft nicht ändernde Klemmverbindung der beiden Klemmteile.An optimal control of the contact force and the breakaway force can be achieved by a number of different measures. The two cone angles can thus be designed almost identically. In contrast to a relative difference between the two cone angles, this results in a contact surface between the two Clamping parts which are provided over the entire surface which is connected to one another. The contact surfaces can additionally be surface-treated, for example surface-finished by tinning and / or glued to one another. The adhesive can be such that it only becomes effective during the joining process. The adhesive strength can also depend on the press-in force. This results in a clamping connection of the two clamping parts that is stable over the long term and practically does not change in its squeezing force over the entire running time.
Um Rückwirkungen des Hilfsantriebs auf den Batteriepol zu vermeiden, kann die Rückstoßkraft am Batteriepol vorbei, beispielsweise schiefwinklig zur Abgangsrich¬ tung den Kabelklemme gerichtet sein. Zusätzlich können die Klemmteile mit einer isolierenden Schutzumhüllung versehen sein. Diese dient insbesondere zur elektri¬ schen Isolierung. Sie kann ferner dazu dienen, die beiden Klemmteile nach ihrer Trennung in definiertem Abstand voneinander zu halten. Hierzu kann die Umhül- lung in die Bewegungsrichtung des einen Klemmteils offen sein. Ferner kann sie Rastmittel für das vom anderen Klemmteil entfernte Klemmteil besitzen. Durch die¬ se Rastmittel wird einerseits die Bewegung des Klemmteils begrenzt und ein Wie¬ derannähern und damit eine Kontaktgabe der beiden Klemmteile verhindert.In order to avoid reactions of the auxiliary drive on the battery pole, the recoil force can be directed past the battery pole, for example at an oblique angle to the direction of exit of the cable clamp. In addition, the clamping parts can be provided with an insulating protective covering. This serves in particular for electrical insulation. It can also serve to keep the two clamping parts at a defined distance from one another after their separation. For this purpose, the casing can be open in the direction of movement of the one clamping part. Furthermore, it can have locking means for the clamping part removed from the other clamping part. This locking means on the one hand limits the movement of the clamping part and prevents it from approaching again and thus preventing the two clamping parts from making contact.
Anhand der Zeichnung ist die Erfindung weiter erläutert. Es zeigtThe invention is further explained on the basis of the drawing. It shows
Fig. 1 eine erste konstruktive Ausgestaltung der Erfindung in Seitenansicht (a) und Draufsicht (b),1 shows a first structural embodiment of the invention in side view (a) and top view (b),
Fig. 2 eine Alternative zur Ausführungsform von Fig. 1 ebenfalls in Seitenansicht und Draufsicht,2 shows an alternative to the embodiment of FIG. 1 also in side view and top view,
Fig. 3 Einzelheiten der erfindungsgemäßen Klemmverbindung,3 details of the clamp connection according to the invention,
Fig. 4 die Klemmverbindung von Fig. 3 im zusammengebauten Zustand,4 shows the clamp connection of FIG. 3 in the assembled state,
Fig. 5 die Klemmverbindung der Figuren 3 und 4 im aufgetrennten Zustand, Fig. 6 eine perspektivische Darstellung einer weiteren Ausführungsform der Erfin¬ dung,5 shows the clamp connection of FIGS. 3 and 4 in the separated state, 6 shows a perspective illustration of a further embodiment of the invention,
Fig. 7 eine Schnittansicht der Ausführungsform von Fig. 6 mit geschlossener Klemmverbindung,7 is a sectional view of the embodiment of FIG. 6 with the clamp connection closed,
Fig. 8 die Klemmverbindung von Fig. 7 im getrennten Zustand undFig. 8 shows the clamp connection of Fig. 7 in the separated state and
Fig. 9 eine Alternative zur Klemmverbindung von Fig. 7.9 shows an alternative to the clamp connection from FIG. 7.
Fig. 1 zeigt eine Batterie-Kabelklemme (im folgenden SBK genannt) 1 , die im we¬ sentlichen aus einer bekannten Ausführung einer Klemme 8 zur Befestigung an einem Batteriepol 8' dient. Die SBK 1 weist ferner zwei Klemmteile 2 und 4 auf, die durch einen Preßsitz an ihrer Berührfläche 7 in elektrisch leitender Verbindung ge- halten sind. Femer ist ein Hilfsantrieb in Form einer Sprengkapsel 3 vorgesehen, der im Klemmteil 2 gehalten ist. Femer besteht zwischen der Sprengkapsel 3 und dem Klemmteil 4 ein Vorvolumen 6. Schließlich ist das Klemmteil 4 mit einer Batte¬ rieleitung 5 verbunden.1 shows a battery cable clamp (hereinafter referred to as SBK) 1, which is essentially used from a known version of a clamp 8 for fastening to a battery pole 8 ' . The SBK 1 also has two clamping parts 2 and 4, which are held in an electrically conductive connection by a press fit on their contact surface 7. An auxiliary drive in the form of a detonator capsule 3 is also provided, which is held in the clamping part 2. There is also a pre-volume 6 between the detonator capsule 3 and the clamping part 4. Finally, the clamping part 4 is connected to a battery line 5.
Beim Ausführungsbeispiel von Fig. 2 ist die Abgangsrichtung des Batteriekabels 5 parallel und fluchtend zur Abgangsrichtung der Batterieklemme 8 vom Batteriepol 8'. Im übrigen sind Teile gleicher Funktion mit gleichem Bezugszeichen wie in Fig. 1 versehen. Den Ausführungsformen von Fig. 1 und Fig. 2 gemeinsam ist, daß bei Wirksamwerden des Hilfsantriebs (Sprengkapsel 3) die bei der Bewegung des Batteriekabels 5 in Richtung des eingezeichneten Pfeils auftretende Rückstoßkraft auf das stationäre Klemmten 2 an der Batterieklemme 8 vorbeigerichtet ist. Da¬ durch kommt es nicht zu einer Beschädigung des Batteriepols 8' und damit der angeschlossenen Fahrzeugbatterie.In the embodiment of FIG. 2, the outgoing direction of the battery cable 5 is parallel and in alignment with the outgoing direction of the battery terminal 8 from the battery pole 8 ' . Otherwise, parts with the same function are provided with the same reference symbols as in FIG. 1. The embodiments of FIG. 1 and FIG. 2 have in common that when the auxiliary drive (detonator capsule 3) becomes effective, the recoil force on the stationary clamp 2 that occurs when the battery cable 5 moves in the direction of the arrow is directed past the battery terminal 8. As a result, there is no damage to the battery pole 8 ' and thus to the connected vehicle battery.
Wesentlich für die Erfindung ist die Konizität des Klemmteils 4 und der entspre¬ chenden Ausprägung der Kontaktfläche im Klemmteil 2 als Kegelsitz. Die Kegel¬ winkel 10a der beiden miteinander elektrisch in Verbindung stehenden Kontaktflä¬ chen sind in etwa gleich und besitzen einen Wert von max. 5, hier darstellt vor¬ zugsweise etwa 2,5°. Dadurch wird eine Selbsthemmung bei der Herstellung der Klemmverbindung den beiden Klemmteilen 2 und 4 erreicht. Die Einpressung des Klemmteils 4 in das Klemmteil 2 erfolgt kraftgesteuert mit einem Wert von bei¬ spielsweise 3500 N. Fertigungstoleranzen werden auf diese Weise weitgehend ausgeglichen. Wichtig ist, daß der Fertigungsprozeß selbst die Parallelität zwi¬ schen dem Konuswinkel 10 und dem Kegelwinkel 10a sicherstellt. Ferner läßt sich bei kraftgesteuerter Einpressung ein eindeutiger Zusammenhang zwischen Ein¬ preß- und Auspreßkraft herstellen. Die Auspreßkraft liegt beispielsweise um den Faktor 1 ,1 bis 1 ,3 höher als die Einpreßkraft. Diese kalkulierbare Auspreßkraft ist wichtig für die Dimensionierung der Sprengkraft der Sprengkapsel 3.The conicity of the clamping part 4 and the corresponding expression of the contact surface in the clamping part 2 as a conical seat are essential for the invention. The cone angles 10a of the two electrically connected contact surfaces are approximately the same and have a value of max. 5, here preferably represents approximately 2.5 °. This creates a self-locking in the manufacture of the Clamping connection reached the two clamping parts 2 and 4. The clamping part 4 is pressed into the clamping part 2 in a force-controlled manner with a value of, for example, 3500 N. Manufacturing tolerances are largely compensated in this way. It is important that the manufacturing process itself ensures the parallelism between the cone angle 10 and the cone angle 10a. Furthermore, with force-controlled press-in, a clear connection between press-in and press-out force can be established. The squeezing force is higher, for example, by a factor of 1.1 to 1.3 than the squeezing force. This calculable squeezing force is important for the dimensioning of the explosive force of the detonator capsule 3.
Um Kontaktkorrision zu vermeiden, wird die Oberfläche des Klemmteils 4 und/oder die Oberfläche des Konus im Klemmteil 2 z.B. mit Zinn (11) oberflächenveredelt. Zusätzlich zum Korrosionsschutz hat die Zinnoberfläche die Eigenschaft, daß beim Fügevorgang das Zinn in etwaige fertigungsbedingte Rillen, Riffen, Vertiefungen und Winkelabweichungen fließt und vor Ort kaltverschweißt wird. Auf diese Weise läßt sich eine formschlüssige, gasdichte Verbindung 12 (Fig. 4) über die gesamte Konus-/Kegelfläche erzeugen.In order to avoid contact corrosion, the surface of the clamping part 4 and / or the surface of the cone in the clamping part 2 is e.g. finished with tin (11). In addition to corrosion protection, the tin surface has the property that during the joining process the tin flows into any grooves, reefs, depressions and angular deviations caused by production and is cold welded on site. In this way, a positive, gas-tight connection 12 (FIG. 4) can be produced over the entire cone / cone surface.
Ebenfalls darstellt ist die Anbringung von Klebstoff, der beispielsweise als Klebring 25 auf dem Klemmteil 4 aufgebracht wird. Es werden idealerweise Klebewerkstoffe verwendet, die erst unter Druck, also während und nach Herstellung der Preßpas¬ sung aushärten. Durch geeignete Wahl des Klebewerkstoffs lassen sich beliebige Haltekräfte einstellen. Die Haltekraft der Klebestelle wird so eingestellt, daß die Summenkraft aus Haltekraft der Preßpassung und Haltekraft der Klebestelle noch unterhalb der Kraft zu liegen kommt, die mit der Sprengkapsel 3 bei deren Auslö¬ sen aufgebracht wird.Also shown is the application of adhesive, which is applied, for example, as an adhesive ring 25 to the clamping part 4. Ideally, adhesive materials are used which only harden under pressure, that is to say during and after production of the press fit. Any holding force can be set by a suitable choice of the adhesive material. The holding force of the glue point is set so that the total force from the holding force of the press fit and the holding force of the glue point is still below the force that is applied with the detonator capsule 3 when it is triggered.
Im ausgelösten Zustand erzeugt die Sprengkapsel 3 ein Gas, das in das Vorvolu¬ men 6 gelangt und eine Auspreßkraft für das Klemmteil 4 erzeugt. Dieses wird aus seinem Klemmsitz gepreßt und nimmt beispielsweise die in Fig. 5 dargestellte Lage ein. In dieser ist die elektrische Verbindung zwischen den Klemmteilen 2 und 4 unterbrochen. Bedingt durch den Kegelsitz erfolgt der Ausstoß des Klemmteils 4 mit mäßiger Dynamik. Begründet wird dies durch die Tatsache, daß nach dem er¬ sten Losbrechen der Konusverbindung ein sehr großer Luftspalt 17 erzeugt wird, der zum augenblicklichen Druckabfall führt und somit die Batterieleitung 5 nicht stark beschleunigt. Ferner ist die Rückstoßkraft auf den Batteriepol 8' im Falle der Auslösung gering. Eine funktionsbeeinträchtigende Schädigung des Batteriepols 8' kann somit vermieden werden.In the triggered state, the detonator capsule 3 generates a gas which enters the fore-volume 6 and generates an extrusion force for the clamping part 4. This is pressed out of its press fit and, for example, assumes the position shown in FIG. 5. In this the electrical connection between the clamping parts 2 and 4 is interrupted. Due to the conical seat, the clamping part 4 is ejected with moderate dynamics. This is justified by the fact that a very large air gap 17 is generated after the cone connection has been broken loose for the first time. which leads to the instantaneous pressure drop and thus does not accelerate the battery line 5 very much. Furthermore, the recoil force on the battery pole 8 'is low in the event of tripping. Damage to the battery pole 8 ′ which impairs the function can thus be avoided.
Zum Schutz möglicherweise in der Nähe befindlicher Personen oder Gegenstände im Falle der Auslösung ist das Klemmteil 2 mit eingepreßtem Klemmteil 4 in ein Kunststoffteil 18 eingeklipst (Fig. 6), das zwei Funktionen erfüllt:To protect people or objects that may be in the vicinity in the event of triggering, the clamping part 2 with the pressed-in clamping part 4 is clipped into a plastic part 18 (FIG. 6), which fulfills two functions:
Wird das Klemmteil 4 mit dem Batteriekabel 5 durch den Hilfsantrieb ausgedrückt, wird der» Weg 19, den das Klemmteil 4 zurücklegt, begrenzt (Fig. 7). Gleichzeitig wird durch Verrastelemente 20 ein Rückfedem und somit nochmaliges Kontaktie¬ ren der Leitung 5 mit dem Batteriepol 8' verhindert. Das Kunststoffteil 18 erfüllt zusätzlich die Funktion eines Berührschutzes.If the clamping part 4 with the battery cable 5 is pressed out by the auxiliary drive, the » path 19 which the clamping part 4 travels is limited (FIG. 7). At the same time, locking elements 20 prevent spring back and thus repeated contacting of the line 5 with the battery pole 8 ' . The plastic part 18 also fulfills the function of a touch guard.
Wird die Sprengkapsel 3 gezündet, so bewegt sich das Klemmteil 4 unter der Wir¬ kung des in der Sprengkapsel 3 entwickelten Gases in Fig. 7 nach rechts, bis ein Bund 4' des Klemmteils 4 am hinteren Ende des Kunststoffteils 18 anschlägt. Dies erfolgt nach Zurücklegen des Wegs 19. Die Zündung der Sprengkapsel 3 erfolgt zweckmäßigerweise mit Hilfe eines nicht dargestellten Airbagsteuergeräts oder eine andere geeignete Auslösesteuerung (z.B. Kurzschlußstrommessung).If the detonator 3 is detonated, the clamping part 4 moves under the action of the gas developed in the detonator 3 to the right in FIG. 7 until a collar 4 'of the clamping part 4 strikes the rear end of the plastic part 18. This takes place after covering the path 19. The detonator 3 is expediently fired with the aid of an airbag control device (not shown) or another suitable trigger control (for example short-circuit current measurement).
In der Stellung, die in Fig. 8 gezeigt ist, werden die Verrastelemente 20 wirksam und verhindern, daß das Klemmteil 4 sich wieder in Richtung des Klemmteils 2 bewegt. Damit ist die Verbindung zwischen dem Batteriekabel 5 und dem Batterie¬ pol 8' dauerhaft unterbrochen.In the position shown in FIG. 8, the locking elements 20 take effect and prevent the clamping part 4 from moving again in the direction of the clamping part 2. The connection between the battery cable 5 and the battery pole 8 ' is thus permanently interrupted.
Beim Ausführungsbeispiel von Fig. 9 schließlich ist das Kunststoffteil 18' mit einer Sollbruchstelle 22 versehen und mit dem Klemmteil 2 über umlaufende Ringnuten 23 verrastet. Beim Trennvorgang löst sich das Kunststoffteil 18' an der Sollbruch- stelle 22, das Batteriekabel mit Klemmteii 4 fallen ab. Eine erneute Kontaktgabe ist damit verhindert. Einbaugeometrien können es verlangen, daß der Trennmechaπismus (Sprengkapsel 3 und Kegelsitz 10/11) nicht direkt an die Batterieklemme 8 ange¬ baut ist, sondern daß er Bestandteil der Batterieleitung ist. Dadurch ergeben sich universelle Einsatzmöglichkeiten. Für die Einbindung in die Batterieleitung 5 ändert sich nichts an der Ausführung der Verbindungsstelle. Lediglich das Kiemmteil 2 ist nicht an die Batterieklemme 8 angebunden, sondern ebenfalls als Leitungsan¬ schlußstück ausgeführt. Finally, in the exemplary embodiment of FIG. 9, the plastic part 18 'is provided with a predetermined breaking point 22 and locked with the clamping part 2 via circumferential ring grooves 23. During the disconnection process, the plastic part 18 ' detaches at the predetermined breaking point 22 and the battery cable with the clamping part 4 falls off. This prevents contact being made again. Installation geometries can require that the separating mechanism (detonator capsule 3 and conical seat 10/11) is not attached directly to the battery terminal 8, but that it is part of the battery cable. This results in universal applications. For the integration into the battery line 5, nothing changes in the design of the connection point. Only the Kiemmteil 2 is not connected to the battery terminal 8, but also designed as a line connector.

Claims

Batterie-Kabelklemme für FahrzeugePatentansprüche Battery cable clamp for vehicles
1. Batterie-Kabelklemme für Fahrzeuge mit einer Befestigungsvorrichtung für ein Kabelendstück, in der zwei Klemmteile über eine mit hoher Trennkraft durch einen Hilfsantrieb lösbare Preßverbindung elektrisch leitend mitein¬ ander verbunden sind, dadurch gekennzeichnet, daß die Preßverbindung über eine konisch ausgebildete Kontaktfläche (10, 11) besteht.1. Battery cable clamp for vehicles with a fastening device for a cable end piece, in which two clamping parts are electrically conductively connected to each other via a press connection that can be released with a high separating force by an auxiliary drive, characterized in that the press connection via a conical contact surface (10, 11) exists.
2. Batterie-Kabelklemme nach Anspruch 1 , dadurch gekennzeichnet, daß die Kontaktfläche vollständig als Kegelsitz mit nahezu identischen Kegelwinkeln (10a) ausgebildet ist.2. Battery cable clamp according to claim 1, characterized in that the contact surface is completely designed as a conical seat with almost identical cone angles (10a).
3. Batterie-Kabelklemme nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine der Kontaktflächen (10, 11) oberflächenveredelt ist.3. Battery cable clamp according to claim 1, characterized in that at least one of the contact surfaces (10, 11) is surface-finished.
4. Batterie-Kabelklemme nach einem der Ansprüche 1 bis 3, dadurch gekenn¬ zeichnet, daß die beiden Klemmteile miteinander verklebt sind (25).4. Battery cable clamp according to one of claims 1 to 3, characterized gekenn¬ characterized in that the two clamping parts are glued together (25).
5. Batterie-Kabelklemme nach einem der Ansprüche 1 bis 4, dadurch gekenn¬ zeichnet, daß die durch den Hilfsantrieb hervorgerufene Rückstoßkraft am Batteriepol (8') vorbeigeleitet ist.5. Battery cable clamp according to one of claims 1 to 4, characterized gekenn¬ characterized in that the recoil caused by the auxiliary drive on the battery pole (8 ' ) is bypassed.
6. Batterie-Kabelklemme nach Anspruch 5, dadurch gekennzeichnet, daß die Rückstoßkraft schiefwinklig zur Abgangsrichtung der Kabelklemme (8) ver¬ läuft. 6. Battery cable clamp according to claim 5, characterized in that the recoil force runs at an oblique angle to the outgoing direction of the cable clamp (8).
7. Batterie-Kabelklemme nach einem der Ansprüche 1 bis 6, dadurch gekenn¬ zeichnet, daß die Klemmteile eine isolierende Umhüllung (18) besitzen, die in der Bewegungsrichtung eines Klemmteils offen ist.7. Battery cable clamp according to one of claims 1 to 6, characterized gekenn¬ characterized in that the clamping parts have an insulating sheath (18) which is open in the direction of movement of a clamping part.
8. Batterie-Kabelklemme nach Anspruch 7, dadurch gekennzeichnet, daß die Umhüllung Rastmittel (20) für das vom anderen Klemmteil (2) entfernte Klemmteil (4) besitzt.8. Battery cable clamp according to claim 7, characterized in that the covering has locking means (20) for the clamping part (4) removed from the other clamping part (2).
9. Verfahren zur Herstellung einer Preßverbindung für eine Batterie- Kabelklemme nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Klemmverbindung mit einer definierten Einpreßkraft vorgenommen wird.9. A method for producing a press connection for a battery cable clamp according to one of claims 1 to 8, characterized in that the clamp connection is made with a defined press-in force.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß der Verlauf der Einpreßkraft während des Koπtaktschlusses überwacht wird.10. The method according to claim 9, characterized in that the course of the press-in force is monitored during the contact closure.
11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die durch den Hilfsantrieb hervorgerufene Auspreßkraft um den Faktor 1 , 1 bis 1 ,3 höher als die maximale Einpreßkraft ist. 11. The method according to claim 9 or 10, characterized in that the squeezing force caused by the auxiliary drive is higher by a factor of 1.1 to 1.3 than the maximum press-in force.
EP97903340A 1996-02-21 1997-02-20 Vehicle battery cable clamp Expired - Lifetime EP0882317B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19606448 1996-02-21
DE19606448A DE19606448A1 (en) 1996-02-21 1996-02-21 Battery cable clamp for vehicles
PCT/EP1997/000813 WO1997031406A1 (en) 1996-02-21 1997-02-20 Vehicle battery cable clamp

Publications (2)

Publication Number Publication Date
EP0882317A1 true EP0882317A1 (en) 1998-12-09
EP0882317B1 EP0882317B1 (en) 1999-09-15

Family

ID=7786005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97903340A Expired - Lifetime EP0882317B1 (en) 1996-02-21 1997-02-20 Vehicle battery cable clamp

Country Status (8)

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US (1) US6171121B1 (en)
EP (1) EP0882317B1 (en)
AR (1) AR005925A1 (en)
AT (1) ATE184733T1 (en)
DE (2) DE19606448A1 (en)
ES (1) ES2137049T3 (en)
WO (1) WO1997031406A1 (en)
ZA (1) ZA971476B (en)

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Also Published As

Publication number Publication date
AR005925A1 (en) 1999-07-21
WO1997031406A1 (en) 1997-08-28
DE59700441D1 (en) 1999-10-21
ZA971476B (en) 1997-08-28
EP0882317B1 (en) 1999-09-15
ES2137049T3 (en) 1999-12-01
ATE184733T1 (en) 1999-10-15
US6171121B1 (en) 2001-01-09
DE19606448A1 (en) 1997-08-28

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