EP2909910A1 - Agencement de circuit de protection pour un réseau multitension - Google Patents

Agencement de circuit de protection pour un réseau multitension

Info

Publication number
EP2909910A1
EP2909910A1 EP13766046.0A EP13766046A EP2909910A1 EP 2909910 A1 EP2909910 A1 EP 2909910A1 EP 13766046 A EP13766046 A EP 13766046A EP 2909910 A1 EP2909910 A1 EP 2909910A1
Authority
EP
European Patent Office
Prior art keywords
voltage
circuit arrangement
low
switch
mesh
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Withdrawn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
EP13766046.0A
Other languages
German (de)
English (en)
Inventor
Sebastian WALENTA
Ulf Pischke
Nils Draese
Juergen Haeffner
Turgut Karacay
Gabriel Wetzel
Mirko Schinzel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2909910A1 publication Critical patent/EP2909910A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Definitions

  • the invention relates to a protective circuit arrangement for a multi-voltage network, for example in a motor vehicle in order to control internal and possibly external faults, in particular short circuits and reverse polarity.
  • the protective circuit arrangement may be at least partially part of a DC-DC converter as well as provided separately in the multi-voltage network.
  • DC-DC converters are used to convert different voltages.
  • a DC-DC converter an electrical circuit or an electrical component is regularly referred to, which converts a DC voltage supplied to the input to another DC voltage.
  • DC voltage converters are used, for example, in so-called multi-voltage networks, in which a primary-side input voltage, based on the converter, is converted into a comparatively high or low secondary-side output voltage.
  • multi-voltage network networks are referred to with multiple meshes, which are operated with different electrical voltages. In the interaction of the different meshes, it is necessary to convert the electrical voltage between them.
  • Multi-voltage networks are found in motor vehicles as electrical power supply systems, which in addition to the usually set to a DC voltage of 12V low-voltage loads with at least one example set to 48V high-power load.
  • the multi-voltage network has a corresponding high-power generator and / or a corresponding high-performance battery and a DC-DC converter, which converts the DC voltage, which is, for example, 48V, with approximately the same power in a 12V voltage.
  • the multi-voltage network of a motor vehicle usually also has a low-voltage battery, for example a 12V battery.
  • DC-DC converters are used, for example, in a low-voltage hybrid system.
  • the DC-DC converter transfers the energy between the 48V and 12V on-board networks.
  • the 48V vehicle electrical system is a high-voltage mesh, the 12V
  • PCU-BRS Power Conversion Unit for Boost Recuperation System
  • a challenge of this converter is to protect the 12V electrical system. This must be ensured even in the case of a short circuit from the high-voltage side to ground and a fürlegierens the half-bridges. It is known for such a protection circuit a fuse, for example.
  • a DC-DC converter which is used in a vehicle electrical system of a motor vehicle.
  • the external ground potential is separated from an internal ground potential point when the DC-DC converter is in the off state. In this way, parasitic current flows are largely avoided.
  • a protective circuit arrangement for a multi-voltage network is presented.
  • Embodiments result from the dependent claims and the description. It is proposed to provide at least one switch both on the low-voltage side or in the low-voltage mesh as well as on the high-voltage side or in the high-voltage mesh. So far, a circuit is provided on the low voltage side.
  • the switch on the high voltage side is designed with different trigger conditions than the switch on the low voltage side.
  • the presented protective circuit arrangement is used, for example, in a motor vehicle, in particular in a recuperation system in the motor vehicle. This is used for energy recovery and leads to a reduction of exhaust gases. It should be noted that in the automotive vehicle, the voltage on the low voltage side is regularly in a range of 9 to 16V. The voltage on the high voltage side can be up to 600V. Such a high voltage is needed, for example, in hybrid vehicles.
  • the first of the two switches protects against internal errors, i. H. Malfunction in the DC-DC converter, and the second switch against external errors, such as. A reverse polarity or a short circuit.
  • switches are usually formed by a number of parallel transistors, for example MOSFET transistors, so that high currents can be efficiently conducted and reliably switched off in this way.
  • FIG. 1 shows an embodiment of a multi-voltage network.
  • FIG. 2 shows an embodiment of the described circuit arrangement in a multi-voltage network.
  • FIG. 3 shows a further embodiment of the described circuit arrangement in a multi-voltage network.
  • FIG. 4 shows yet another embodiment of the described circuit arrangement in a multi-voltage network.
  • Figure 5 illustrates in a schematic representation different triggering conditions.
  • FIG. 1 shows an embodiment of a multi-voltage network, which is generally designated by the reference numeral 10.
  • This multi-voltage network comprises a high-voltage mesh 12 and a low-voltage mesh 14, between which a DC-DC converter 16 is connected. This converts the voltage between the two meshes 12 and 14. Furthermore, a load 18 and a source 20 are provided in the high-voltage mesh 12.
  • the low-voltage mesh 14 comprises a consumer 22 and a source 24.
  • a consumer or an energy source for example a battery, may be provided in each of the two meshes 12 and 14, respectively.
  • An error in the DC-DC converter 16 now leads to a malfunction of the entire multi-voltage network 10.
  • FIG. 2 shows an embodiment of the protective circuit arrangement, designated overall by the reference numeral 50.
  • This circuit arrangement 50 comprises a DC-DC converter 52 which is provided in the region between a high-voltage mesh 54 and a low-voltage mesh 56, ie in this embodiment that the DC-DC converter 52 respectively comprises parts of the two meshes 54 and 56.
  • the DC-DC converter has a microcontroller 61 as a controller, a module with the circuit inductances 62 and a power or switching part 64.
  • a number of branches 66 are provided corresponding to the number of phases.
  • Each phase consists of a half-bridge with two transistors or switches with an upper half-bridge 68 and a lower half-bridge 69.
  • a switch 72 with a source 74 and a motor 76 parallel to it are provided at terminal 60 (reference numeral 70).
  • a source 80, a first consumer 82, a second consumer 84 and an additional consumer 86 are connected in parallel with each other.
  • a first switch 90 is provided in the high-voltage mesh 54 and a second switch 92 is provided in the ground path and thus in the low-voltage mesh 56.
  • the two switches 90 and 92 can be responded to different errors suitable.
  • the first switch 90 is opened.
  • the second switch 92 is opened.
  • a short circuit between high and low voltage can be externally caused by a short circuit in the wiring harness. In this case, no countermeasure is required. If this short circuit is due to an internal short circuit, the switches 90 and 92 are opened.
  • FIG. 3 shows a further embodiment of the circuit arrangement 100 with a DC-DC converter 102 having a first phase 104, a second phase 106 and a third phase 108.
  • This DC-DC converter 102 is arranged between a high-voltage mesh 110 and a low-voltage mesh 12, wherein parts of the two meshes 1 10 and 1 12 are integrated in the DC-DC converter 102.
  • the high-voltage mesh includes u. a. a switch 120 and a source 122 in series connected in parallel with an electric machine 124.
  • a source 130, a first consumer 132, a second consumer 134 and another consumer 136, for example, the electric machine 124 are arranged parallel to each other.
  • a first switch 140 and a second switch 142 is arranged in the DC-DC converter 102 on the high-voltage side and thus in the high-voltage mesh 1 10.
  • This so-called back-to-back arrangement (B2B) is formed by means of two oppositely arranged MOSFETs.
  • a third switch 144 and a fourth switch 146 are provided, which form a provoket B2B.
  • the first switch 140 protects against an internal fault, for example when the upper half-bridge switch 150 of the DC-DC converter 102 breaks down.
  • the second switch 142 protects against an external short-circuit or a reverse polarity in the high-voltage mesh 110.
  • the third switch 144 protects against internal errors, for example at a
  • the fourth switch 146 protects at an external reverse polarity in the low-voltage mesh 1 12 and thus on the low-voltage side.
  • FIG. 4 shows yet another embodiment of the circuit arrangement 200 with a DC-DC converter 202 between a high-voltage mesh 204 and a low-voltage mesh 206.
  • a DC-DC converter 202 between a high-voltage mesh 204 and a low-voltage mesh 206.
  • only one switch 210 is provided in the DC-DC converter in the high-voltage mesh 204.
  • the second switch can be omitted if there is no need to react to a polarity reversal of the high-voltage mesh, because this can be excluded, for example, by external measures.
  • a second switch 212 and a third switch 214 are provided in the DC-DC converter 202 on the low voltage side. However, these are not provided in the ground connection but in the potential connection of the low-voltage mesh.
  • the high voltage mesh 204 includes i.a. a switch 220 in series with a source 222. Parallel to these, an electric machine 224 is provided.
  • Low-voltage mesh 206 further includes a source 230, a first consumer 232, a second consumer 234, and an additional consumer
  • FIG. 5 tripping conditions are shown.
  • the illustration shows a comparator 250, in this case a hardware comparator, a microcontroller 252 and a watchdog 254, in this case a hardware watchdog.
  • a logic gate 256 in this case an OR gate.
  • the switches should have the following triggering conditions:
  • the comparator 250 detects too high an output current.
  • the microcontroller 252 detects a malfunction.
  • the watchdog 254 detects a malfunction of the microcontroller 252.
  • the hardware comparator 250 compares an output, such as the output current or the output voltage, with a maximum threshold.
  • the microcontroller 252 has a monitoring function for the output current. While this monitor function is more accurate than the hardware comparator 250, it is slower.
  • the hardware watchdog 254 ensures that the microcontroller 252 is operating correctly, i. H. that the microcontroller monitoring function, which should open the associated switch as needed, is executed properly.
  • the microcontroller 250 can basically monitor operating conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un agencement de circuit de protection pour un réseau multitension. Cet agencement comprend un convertisseur continu-continu (102) qui est prévu dans la région du passage entre une maille de haute tension (110) et une maille de basse tension (112), un interrupteur étant prévu aussi bien dans la maille de haute tension que dans la maille de basse tension.
EP13766046.0A 2012-10-17 2013-09-20 Agencement de circuit de protection pour un réseau multitension Withdrawn EP2909910A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012218914.9A DE102012218914A1 (de) 2012-10-17 2012-10-17 Schutzschaltungsanordnung für ein Mehrspannungsnetz
PCT/EP2013/069632 WO2014060181A1 (fr) 2012-10-17 2013-09-20 Agencement de circuit de protection pour un réseau multitension

Publications (1)

Publication Number Publication Date
EP2909910A1 true EP2909910A1 (fr) 2015-08-26

Family

ID=49230758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13766046.0A Withdrawn EP2909910A1 (fr) 2012-10-17 2013-09-20 Agencement de circuit de protection pour un réseau multitension

Country Status (5)

Country Link
US (1) US9893511B2 (fr)
EP (1) EP2909910A1 (fr)
CN (1) CN104704698B (fr)
DE (1) DE102012218914A1 (fr)
WO (1) WO2014060181A1 (fr)

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DE102012219365A1 (de) * 2012-10-23 2014-04-24 Schmidhauser Ag Gleichspannungswandler
DE102015000576B4 (de) * 2015-01-16 2021-07-29 Audi Ag Kraftfahrzeug mit Schaltvorrichtung für eine bordnetzbetriebene Komponente
KR101730636B1 (ko) * 2015-06-11 2017-05-11 엘에스오토모티브 주식회사 안정성이 향상된 양방향 비절연 dc-dc 컨버터
JP6436055B2 (ja) 2015-10-28 2018-12-12 株式会社オートネットワーク技術研究所 多相コンバータ
CN105932344B (zh) * 2016-05-13 2018-06-19 浙江安美科技有限公司 一种可级联的动力电池组安全保护模块
US10439496B2 (en) * 2016-08-30 2019-10-08 Lg Chem, Ltd. Control system for transitioning a DC-DC voltage converter from a buck operational mode to a safe operational mode
KR101796395B1 (ko) * 2016-10-31 2017-11-10 엘에스오토모티브 주식회사 컨버터의 고장 검출 장치 및 방법
US10348207B2 (en) * 2016-11-15 2019-07-09 Lg Chem, Ltd. Control system for transitioning a DC-DC voltage converter from a boost operational mode to a safe operational mode
FR3071114B1 (fr) * 2017-09-11 2022-06-03 Valeo Systemes De Controle Moteur Convertisseur de tension embarque sur un vehicule automobile et dispositif de precharge associe
FR3071109A1 (fr) * 2017-09-11 2019-03-15 Valeo Systemes De Controle Moteur Convertisseur de tension embarque sur un vehicule automobile et chargeur electrique associe
US10800264B2 (en) 2017-09-15 2020-10-13 Nio Usa, Inc. System and method for providing ASIL D fail operational power systems in automated vehicle applications
US10857889B2 (en) 2017-10-04 2020-12-08 Nio Usa, Inc. Highly-integrated fail operational e-powertrain for autonomous driving application
CN116345902A (zh) * 2021-12-22 2023-06-27 法雷奥电机控制系统公司 安全功率开关装置，电压转换器和电动车

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Also Published As

Publication number Publication date
DE102012218914A1 (de) 2014-04-17
CN104704698B (zh) 2018-05-04
US9893511B2 (en) 2018-02-13
CN104704698A (zh) 2015-06-10
WO2014060181A1 (fr) 2014-04-24
US20150288169A1 (en) 2015-10-08

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