EP3591684A1 - Relais à pont d'amortissement des chocs - Google Patents

Relais à pont d'amortissement des chocs Download PDF

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Publication number
EP3591684A1
EP3591684A1 EP18181662.0A EP18181662A EP3591684A1 EP 3591684 A1 EP3591684 A1 EP 3591684A1 EP 18181662 A EP18181662 A EP 18181662A EP 3591684 A1 EP3591684 A1 EP 3591684A1
Authority
EP
European Patent Office
Prior art keywords
relay
contact bridge
bridge
sub
contact
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.)
Withdrawn
Application number
EP18181662.0A
Other languages
German (de)
English (en)
Inventor
Rainer Schmelz
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.)
Gruner AG
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
Priority to EP18181662.0A priority Critical patent/EP3591684A1/fr
Priority to PCT/EP2019/067391 priority patent/WO2020007743A1/fr
Publication of EP3591684A1 publication Critical patent/EP3591684A1/fr
Withdrawn legal-status Critical Current

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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 up to 50VDC. The relay must also be able to switch off overcurrent situations, ie avoid short circuits in the battery.
  • 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 implemented in a monostable version as normaly 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 preferably applies: 0.5 ⁇ (M1 * L1) / (M2 * L2) ⁇ 2, particularly preferably: 0.95 ⁇ ( M1 * L1) / (M2 * L2) ⁇ 1.05.
  • M1 * L1 M2 * L2
  • 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.
  • Relay (disconnector) 1 shown is used to close or interrupt the circuit between two electrical relay contacts 2 1 , 2 2 , which are arranged as contact heads at the free ends of two mutually facing, U-shaped relay connection contacts 3 1 , 3 2 .
  • each relay contact 2 1 , 2 2 is formed by a series of three contact heads.
  • an electrically conductive contact bridge 5 (for example made of copper) is guided in the relay housing 4 in the direction of the double arrow 6 between two relay positions.
  • the contact bridge 5 In the one, closed relay position, the contact bridge 5 is in each case with three contact buttons 5 1 and 5 2 on the two relay contacts 2 1 , 2 2 and is in the other, open relay position, which in the FIGS. 1 and 2 is shown, lifted from the two relay contacts 2 1 , 2 2 .
  • the relay 1 has a magnetic drive 7 with a magnet coil 8 and an armature 9 which is displaceable parallel to the direction of displacement 6 of the contact bridge 5 and which moves from its one end position by reversing the polarity of the magnet coil 8 against the restoring force of a compression spring 10 into its 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.
  • the magnetic drive 7 is designed as a monostable lifting magnet and the armature 9 as a plunger core (plunger) which is guided in the magnetic coil 8 in a linear manner.
  • 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 by way of example) parallel single bridges 5a, 5b, 5c , each with two contact heads 5 1 , 5 2 , which are displaceably guided independently of one another in the bridge 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 guided side walls of the bridge cage 15 each have only one punctiform guide projection 22 and the guided sides of the guide cap 20 have a plurality of guide ribs 23 , so that in operation, despite hot individual bridges 5a, 5b, 5b, the bridge cage 15 and the guide cap 20 preferably do not come into contact with the plastic holder 21 come and can melt on it or the individual bridges 5a, 5b, 5b, if possible, cannot shift or block against each other.
  • the magnetic field of magnet coil 8 is switched on or off.
  • the anchor 9 is, as in the FIGS. 1 and 2 shown, pressed down by the compression spring 10 when the magnetic field is switched off and thereby also pushes the bridge cage 15 together with the individual bridges 5a, 5b, 5b up via the lever 10, until in the open relay position the single bridges 5a, 5b, 5b from the relay contacts 2 1 , 2 2 are lifted off.
  • the mutually facing, U-shaped relay connection contacts 3 1 , 3 2 also reduces dynamic lifting at high short-circuit currents, since the magnetic field which is generated by the current flowing through the U-shaped relay connection contacts 3 1 , 3 2 , the individual bridges 5a , 5b, 5b additionally presses in the contact closing direction.
  • the movable parts of the magnetic drive 7, that is to say the magnet armature 9, and the contact bridge 5 (including the bridge cage 15) are designed such that for the mass M1 (including the bridge cage 15 ) and the lever length L1 of the contact bridge 5 as well as 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)
EP18181662.0A 2018-07-04 2018-07-04 Relais à pont d'amortissement des chocs Withdrawn EP3591684A1 (fr)

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

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP3591684A1 true EP3591684A1 (fr) 2020-01-08

Family

ID=62873226

Family Applications (1)

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

Country Status (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022188984A1 (fr) * 2021-03-11 2022-09-15 Pierburg Gmbh Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension
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

Families Citing this family (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

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 (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
WO2022188984A1 (fr) * 2021-03-11 2022-09-15 Pierburg Gmbh Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension

Also Published As

Publication number Publication date
WO2020007743A1 (fr) 2020-01-09

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