WO2020007743A1 - Relais doté d'un pont de contact compensé contre les chocs - Google Patents

Relais doté d'un pont de contact compensé contre les chocs Download PDF

Info

Publication number
WO2020007743A1
WO2020007743A1 PCT/EP2019/067391 EP2019067391W WO2020007743A1 WO 2020007743 A1 WO2020007743 A1 WO 2020007743A1 EP 2019067391 W EP2019067391 W EP 2019067391W WO 2020007743 A1 WO2020007743 A1 WO 2020007743A1
Authority
WO
WIPO (PCT)
Prior art keywords
relay
contact bridge
bridge
armature
contact
Prior art date
Application number
PCT/EP2019/067391
Other languages
German (de)
English (en)
Inventor
Rainer Schmelz
Original Assignee
Gruner Ag
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 Gruner Ag filed Critical Gruner Ag
Publication of WO2020007743A1 publication Critical patent/WO2020007743A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/643—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2025—Bridging contacts comprising two-parallel bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H2001/506—Fail safe contacts, i.e. the contacts being kept in a safe position, usually in an open circuit position, at end of life time of switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity

Definitions

  • the present invention relates to a relay for closing or interrupting the circuit between two relay contacts.
  • Such relays are well known and are used, for example, as disconnectors in the vehicle sector for 48V applications or in a battery management system for Li-ion batteries.
  • the relay disconnects the vehicle electrical system (+ pole) from vehicle consumers. This protects the cells and the vehicle from critical situations.
  • the requirements in a vehicle make it necessary to withstand extreme shock situations, for example in the event of a crash: the relay has opened and must remain in this state even after the crash; Here acceleration values of approx. 150 g occur for 10 ms.
  • these relays are also integrated as disconnectors in battery management systems. The relay must also be able to switch off overcurrent situations, ie avoid short circuits in the battery.
  • a relay for closing or interrupting the circuit between two relay contacts comprising:
  • an electrically conductive contact bridge that can be moved between two relay positions, which is in contact with the two relay contacts in one, closed relay position and is lifted off the two relay contacts in the other, open relay position,
  • a magnet drive with a magnet coil and an armature displaceably guided parallel or almost parallel to the direction of displacement of the contact bridge, which armature can be displaced by reversing the polarity of the magnet coil, and
  • the signs of acceleration acting on the armature and on the contact bridge are reversed in the event of a shock, so that the total torque acting on the armature and on the contact bridge is mutually reduced by the lever deflection and the relay therefore remains in its previous state despite the shock.
  • the relay can be designed in a monostable version as normal open or in a bistable version.
  • the mass M1 and the lever length L1 of the contact bridge and for the mass M2 and the lever length L2 of the armature the following preferably applies: 0.5 ⁇ (M1 * L1) / (M2 * L2) ⁇ 2, particularly preferably: 0.95 ⁇ (M1 * L1) / (M2 * L2) ⁇ 1.05.
  • the contact bridge and the armature are arranged on the same side of the double-armed lever.
  • the contact bridge and the armature can also be arranged on different sides of the double-armed lever.
  • the contact bridge is preferably resiliently mounted in the displacement direction in a bridge cage which is displaceably guided in the relay housing in the displacement direction and on which a lever arm is articulated.
  • the mass M1 is given by the total mass of the contact bridge and bridge cage.
  • the contact bridge is advantageously biased in the bridge cage in the direction of the relay contacts, which on the one hand specifies the contact pressure with which the contact bridge is in contact with the relay contacts in the closed relay position, and on the other hand causes the relay to close with less bounce.
  • the contact bridge can be formed by a single wide bridge or, which is preferred, by a plurality of parallel, narrow individual bridges, each with two contact heads.
  • the two electrical relay contacts are preferably arranged on the free ends of two mutually facing, U-shaped relay connection contacts. This reduces the dynamic lifting of the contact bridge at high short-circuit currents, since the magnetic field, which is generated by the current flowing through the U-shaped relay connection contacts, also pushes the contact bridge in the contact closing direction.
  • FIG. 1 shows the relay according to the invention with a displaceable contact bridge and with a magnetic drive
  • FIGS. 2a-2c a Hebeium deflection between the magnetic drive and the contact bridge in a side view (Fig. 2a), in a perspective view (Fig. 2b) and in a view from below (Fig. 2c); and
  • FIGS. 3a, 3b a spring-loaded mounting of the contact bridge in a bridge cage in a perspective view obliquely from above (FIG. 3a) and in a perspective view from below (FIG. 3b).
  • relay (disconnector) 1 is used to close or interrupt the circuit between two electrical relay contacts 2i, 2 2 , which are arranged as contact heads on the free ends of two mutually facing, U-shaped relay connection contacts 3i, 3 2 .
  • each relay contact 2-i, 2z is formed by a series of three contact heads.
  • an electrically conductive contact bridge 5 (for example made of copper) is guided in the direction of the double arrow 6 between two relay positions in the relay housing 4.
  • the contact bridge 5 In the one, closed relay position, the contact bridge 5 is in each case with three contact buttons 5-i or 5 2 on the two relay contacts 2-j, 2 2 and is in the other, opened rice position, which is shown in FIGS. 1 and 2 is shown, of the two relay contacts 2 1; 2 2 lifted off.
  • the relay 1 has a magnetic drive 7 with a magnet coil 8 and a parallel to the direction of displacement 6 of the contact bridge 5 displaceably guided armature 9, which poles the solenoid 8 against the restoring force of a compression spring 10 in its one end position other end position is displaceable.
  • a double-armed lever 12 is also rotatably mounted about an axis 13 extending at right angles to the direction of displacement 6, on one lever arm 12a of which the armature 9 at 14a and on the other arm 12b of which the contact bridge 5 at 14b are articulated in the exemplary embodiment shown are the magnetic drive 7 as a monostable solenoid and the armature 9 as a plunger (plunger) guided linearly in the magnet coil 8.
  • the contact bridge 5 can be resiliently mounted in a bridge cage 15 (for example made of steel) which carries the axis 14b and is in turn guided in the relay housing 4 in the direction of displacement 6 between the two two relay positions.
  • the contact bridge 5 consists of several (here three examples) parallel single bridges 5a, 5b, 5c, each with two contact heads 5 ⁇ i, 5 2 , which are guided independently of one another in the back cage 15 in the direction of displacement 6.
  • the left single bridge 5a is omitted for reasons of clarity.
  • the individual bridges 5a, 5b, 5c are each prestressed by a compression spring 17 supported on the cage ceiling 16 in contact with an intermediate floor 18 of the bridge cage 15.
  • the intermediate floor 18 is designed as a separate steel sheet and has a plurality of bent guide fingers 19 in order to separate the individual bridges 5a, 5b, 5b from one another and to guide them against tilting in the direction of displacement 6.
  • the bridge cage 15 carries a guide cap 20 which overlaps the cage cover 16 and by means of which the bridge cage 15 is displaceably guided in a plastic holder 21 of the relay housing 4.
  • the magnetic field of magnet coil 8 is switched on or off.
  • the anchor 9 is, as in FIGS. 1 and 2, when the magnetic field is switched off, pressed down by the compression spring 10 and, as a result, the bridge cage 15, together with the individual bridges 5a, 5b, 5b, is also pressed up via the lever 10 until the individual bridges 5a, 5b, 5b of in the open relay position the relay contacts 2i, 2 2 are lifted off.
  • the mutually facing, U-shaped relay connection contacts 3i, 3 2 also reduces dynamic lifting at high short-circuit currents, since the magnetic field generated by the current flowing through the U-shaped relay connection contacts 3i, 3 2 , the individual bridges 5a, 5b , 5b additionally presses in the contact closing direction.
  • the moving parts of the magnet drive 7, i.e. the magnet armature 9, and the contact bridge 5 are designed such that for the mass M1 (including a bridge cage 15) and the lever length 11 of the contact bridge 5 and for the mass M2 and the lever length L2 of the armature 9 applies: M1 * L1 ⁇ M2 * L2.
  • M1 * L1 ⁇ M2 * L2 the torques acting on the armature 9 and on the contact bridge 5 cancel each other out, which is achieved by the lever deflection.
  • the signs of acceleration and torque are therefore inverse.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Abstract

L'invention concerne un relais (1) pour fermer ou interrompre le circuit entre deux contacts de relais (21, 22), comprenant : un pont de contact électriquement conducteur (5) qui est déplaçable dans le boîtier de relais (4) entre deux positions de relais et qui, dans une position de relais fermée, repose contre les deux contacts de relais (21, 22) et est soulevé des deux contacts de relais (21, 22) dans l'autre position ouverte, un entraînement magnétique (7) doté d'une bobine magnétique (8) et d'un induit (9) qui est guidé de manière déplaçable parallèlement ou presque parallèlement à la direction de déplacement (6) du pont de contact (5) et qui peut être déplacé en inversant la polarité de la bobine magnétique (8), et un levier à double bras (12) qui est monté de manière rotative dans le boîtier de relais (4) autour d'un axe (13) s'étendant perpendiculairement à la direction de déplacement (6) et sur l'un des bras de levier (12a) duquel est articulé le pont de contact (5) et sur l'autre bras de levier (12b) duquel est articulé l'induit (9).
PCT/EP2019/067391 2018-07-04 2019-06-28 Relais doté d'un pont de contact compensé contre les chocs WO2020007743A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18181662.0A EP3591684A1 (fr) 2018-07-04 2018-07-04 Relais à pont d'amortissement des chocs
EP18181662.0 2018-07-04

Publications (1)

Publication Number Publication Date
WO2020007743A1 true WO2020007743A1 (fr) 2020-01-09

Family

ID=62873226

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/067391 WO2020007743A1 (fr) 2018-07-04 2019-06-28 Relais doté d'un pont de contact compensé contre les chocs

Country Status (2)

Country Link
EP (1) EP3591684A1 (fr)
WO (1) WO2020007743A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111413642A (zh) * 2020-04-13 2020-07-14 浙江华电器材检测研究所有限公司 一种变压器突然短路试验的冲击补偿电路

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4184542A4 (fr) * 2020-07-31 2023-09-13 Huawei Digital Power Technologies Co., Ltd. Dispositif de contact, commutateur électromagnétique, chargeur embarqué et nouveau véhicule d'énergie
DE112021007249A5 (de) * 2021-03-11 2023-12-28 Pierburg Gmbh Kontaktbrückenvorrichtung für einen schalter eines hochvoltschützes oder hochvoltrelais

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054872A (en) * 1958-11-28 1962-09-18 Ward Leonard Electric Co Electrical contactor
US3087031A (en) * 1960-06-20 1963-04-23 Automatic Switch Co Solenoid-operated switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054872A (en) * 1958-11-28 1962-09-18 Ward Leonard Electric Co Electrical contactor
US3087031A (en) * 1960-06-20 1963-04-23 Automatic Switch Co Solenoid-operated switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111413642A (zh) * 2020-04-13 2020-07-14 浙江华电器材检测研究所有限公司 一种变压器突然短路试验的冲击补偿电路

Also Published As

Publication number Publication date
EP3591684A1 (fr) 2020-01-08

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