US20060012941A1 - Method for operating an electronic module supplied with electrical energy by an operating voltage source - Google Patents

Method for operating an electronic module supplied with electrical energy by an operating voltage source Download PDF

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Publication number
US20060012941A1
US20060012941A1 US10/535,740 US53574005A US2006012941A1 US 20060012941 A1 US20060012941 A1 US 20060012941A1 US 53574005 A US53574005 A US 53574005A US 2006012941 A1 US2006012941 A1 US 2006012941A1
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United States
Prior art keywords
autonomous
capacitor
function
autonomous capacitor
operating voltage
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Abandoned
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US10/535,740
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English (en)
Inventor
Markus Heckel
Manfred Kulesch
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Conti Temic Microelectronic GmbH
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Conti Temic Microelectronic GmbH
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Assigned to CONTI TEMIC MICROELECTRONIC GMBH reassignment CONTI TEMIC MICROELECTRONIC GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HECKEL, MARKUS, KULESCH, MANFRED
Publication of US20060012941A1 publication Critical patent/US20060012941A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

Definitions

  • the invention relates to a method for operating an electronic module which is supplied with electrical energy by a voltage source according to the preamble of patent claim 1 .
  • An electronic module of this type is known from DE 197 15 571 A1, wherein a system-autonomous capacitor is charged from an up-converter supplied by an operating voltage source to a value lying above the operating voltage, in order to operate with it a down-converter which is series-connected to the system-autonomous capacitor.
  • This down-converter supplies several electronic modules, which each comprise a function-autonomous capacitor as an energy storage, to ignite a passenger protection equipment, such as e.g. an airbag, in the event of an operating voltage failure.
  • a passenger protection equipment such as e.g. an airbag
  • FIG. 2 shows a simplified block diagram of this known electronic module, which is composed of an up-converter 1 , a down-converter 2 which is series-connected to the up-converter 1 and a power module 3 connected to the down-converter 2 , these functional units being controlled by a microprocessor ⁇ C.
  • the power module 3 on its part triggers a security unit 4 , as for example an airbag, a seat belt tensioner or a roll-over bar.
  • a security unit 4 as for example an airbag, a seat belt tensioner or a roll-over bar.
  • the up-converter 1 is supplied with an operating voltage source, which is as a rule the battery voltage U bat .
  • a system-autonomous capacitor C S connected to the connection line of the two voltage converters 1 serves for bridging the voltage interruption in the event of a battery voltage failure, e.g. with an accident entailing the functional deficiency of the vehicle battery.
  • said system-autonomous capacitor C S is charged by the up-converter 1 to a value lying above the battery voltage U bat .
  • a further capacitor C Z connected to the output of the down-converter 2 , serves as an ignition-autonomous capacitor, to likewise ensure the ignition energy for the pyrotechnic triggering of a security unit 4 in the event of an operating voltage failure.
  • the object of the invention to indicate a method for operating an electronic module of this type, which can be easily implemented and which requires a low circuit expenditure.
  • the function-autonomous capacitor is connected both to the voltage converter and to the system-autonomous capacitor by means of a charging connection, said charging connection being controllable in order to fulfill various functions in different operating states.
  • the charging connection is controlled in a switching mode for clocking the charging current.
  • the charging connection is operated as a controllable resistance, i.e. as a current source for producing a constant discharging current.
  • checking the system-autonomous capacitor can be controlled with the charging connection by its discharging into the function-autonomous capacitor.
  • the method according to the invention can be implemented in easy manner, in particular if the charging connection is composed of at least one transistor element and of a resistance which is series-connected to it, in particular if merely a single transistor with high ampacity is connected in series to the resistor between the two autonomous capacitors.
  • the voltage converter is embodied as an up-converter.
  • the method according to the invention can advantageously be used in a motor vehicle control device for passenger protection equipment, wherein an ignition-autonomous capacitor ensures as a system function the provision of the ignition energy for the pyrotechnic triggering of the security units.
  • FIG. 1 shows a block diagram of a control circuit 10 for security units 4 , such as airbags, seat belt tensioners, belt load limiters and roll-over bars in motor vehicles.
  • This control circuit contains an up-converter 1 , which via an ignition switch S Z is connected to an operating voltage source, for example the vehicle battery, by means of the terminal 15 , to be supplied with an operating voltage U Bat of e.g. 24V. From this said up-converter 1 produces a voltage lying above it of e.g. 48V, with which a system-autonomous capacitor C S is charged and simultaneously with this operating voltage U S a charging connection 5 and a down-converter 2 is supplied.
  • an up-converter 1 which via an ignition switch S Z is connected to an operating voltage source, for example the vehicle battery, by means of the terminal 15 , to be supplied with an operating voltage U Bat of e.g. 24V. From this said up-converter 1 produces a voltage lying above it of e.g. 48V, with which
  • This down-converter 2 produces from the operating voltage U S for example an operating voltage U ⁇ C for both a microprocessor ⁇ C and operating voltages U Sat for further modules, e.g. sensor groups, in particular for side-crash-recognition.
  • the charging current 5 substantially shows only the most important elements, namely a series pass transistor T, whose collector electrode is connected to the operating voltage U S , whose source electrode is applied via a resistance R to the output of this charging connection and is connected directly to an ignition-autonomous capacitor C Z and an ignition power module 3 for triggering a security unit 4 .
  • current sources 6 and 7 are supplied by this charging connection 5 , whose functions are described below.
  • the ignition-autonomous capacitor C Z is charged by the charging connection 5 to a voltage U Zünd and in the event of operating voltage interruptions provides the ignition energy in the event of the triggering of a security unit 4 via their allocated ignition power module 3 .
  • control circuit 10 i.e. the up-converter 1 , the charging connection 5 , the voltage sources 6 and 7 , the ignition power module 3 and the down-converter 2 are controlled by the microprocessor ⁇ C, which for their control detects adequate voltage levels via the lines a, b and c.
  • microprocessor ⁇ C which for their control detects adequate voltage levels via the lines a, b and c.
  • further functional groups required for the function as a control circuit for security units, such as e.g. sensors, are not shown.
  • this control circuit 10 After closing the ignition switch S Z at first before regular operation the circuit is booted up within a softstart by appropriate clocked control of the up-converter 1 .
  • this softstart the transistor T of the charging connection 5 is controlled to the closed state, so that therewith not only the system-autonomous capacitor C S , but also the ignition-autonomous capacitor C Z is supplied with charging current.
  • the softstart operation is followed by a booster operation, wherein the two autonomous capacitors C S and C Z are charged to the respective voltage U S and U Zünd , resp. With this the transistor T of the charging connection 5 is operated as a switch both in the softstart mode and in the booster mode.
  • the two autonomous capacitors C S and C Z comprise a security relevant function, namely ensuring operation of the control circuit and provision of ignition energy in the event of a failure of the operating voltage source caused by an accident, said capacitors must be subject to testing at regular intervals.
  • the capacitor testing for the system-autonomous capacitor C S is effected by being discharged via the controlled charging connection 5 into the ignition-autonomous capacitor C Z .
  • This capacitor test can be implemented subsequently to the softstart with an opened transistor T of the charging connection 5 or—as is explained below—by means of the microprocessor ⁇ C after a discharge of the ignition-autonomous capacitor C Z effected in the opened state of the transistor T of the charging connection.
  • the said transistor T operates as a controlled resistance, by being controlled by the microprocessor ⁇ C as a current source for producing a constant current.
  • the ignition-autonomous capacitor C Z must be discharged to ground in defined manner. This happens with a current source 6 , which is triggered accordingly by the microprocessor ⁇ C.
  • the transistor T of the charging connection 5 is controlled in a circuit operation, i.e. in this case blocked, so that based on its high impedance no current can flow from the system-autonomous capacitor C S into the circuit branch which is series-connected to the charging connection 5 .
  • the transistor T of the charging connection 5 is operated again as a controlled resistance via an appropriate triggering of the microprocessor ⁇ C, for producing as a re-loading source a very low re-loading current for the ignition-autonomous capacitor C Z .
  • the ignition-autonomous capacitor C Z When shutting down the control circuit 10 , i.e. when opening the ignition switch S Z , the ignition-autonomous capacitor C Z must be discharged to ensure that unintentional ignition of the security unit 4 is not possible. This is realized by the fact that the ignition-autonomous capacitor C Z is discharged by means of triggering a discharge current source 7 by means of the microprocessor ⁇ C.
  • the exemplary control circuit 10 according to FIG. 1 shows only a single ignition power module 2 with a security unit 4 .
  • several ignition power modules with a respectively allocated security unit can be connected to the output of the charging connection 5 and the ignition-autonomous capacitor C Z , resp.
  • one ignition power module each with allocated security unit is supplied by a charging. connection each with separated ignition-autonomous capacitor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
US10/535,740 2002-11-28 2003-09-25 Method for operating an electronic module supplied with electrical energy by an operating voltage source Abandoned US20060012941A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10255429A DE10255429A1 (de) 2002-11-28 2002-11-28 Verfahren zum Betreiben einer aus einer Betriebsspannungsquelle versorgten elektronischen Baugruppe
DE10255429.3 2002-11-28
PCT/DE2003/003193 WO2004051822A1 (fr) 2002-11-28 2003-09-25 Procede permettant de faire fonctionner un composant electronique alimente par une source de tension de fonctionnement

Publications (1)

Publication Number Publication Date
US20060012941A1 true US20060012941A1 (en) 2006-01-19

Family

ID=32308780

Family Applications (1)

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US10/535,740 Abandoned US20060012941A1 (en) 2002-11-28 2003-09-25 Method for operating an electronic module supplied with electrical energy by an operating voltage source

Country Status (4)

Country Link
US (1) US20060012941A1 (fr)
EP (1) EP1565978A1 (fr)
DE (1) DE10255429A1 (fr)
WO (1) WO2004051822A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070289855A1 (en) * 2004-02-27 2007-12-20 Hartmut Schumacher Device for Supplying an Ignition Current from an Energy Reserve to at Least One Ignition Power Module
CN102884704A (zh) * 2010-05-04 2013-01-16 罗伯特·博世有限公司 用于驱动车辆的安全系统的控制器和用于驱动这种车辆的安全系统的方法
CN103176053A (zh) * 2011-12-23 2013-06-26 鸿富锦精密工业（深圳）有限公司 电容容量及其寄生电阻测量电路
US11273781B2 (en) * 2017-05-05 2022-03-15 Continental Automotive Gmbh Method for triggering a plurality of actuators of a safety system of a motor vehicle from an energy source

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005012282A1 (de) * 2005-03-17 2006-09-21 Conti Temic Microelectronic Gmbh Schaltungsanordnung zum Ansteuern von Insassenschutzeinrichtungen mit einem Feuchtigkeitssensor
EP3604046B1 (fr) * 2017-03-27 2021-05-05 Panasonic Intellectual Property Management Co., Ltd. Dispositif d'alimentation électrique embarqué et véhicule sur lequel est monté le dispositif d'alimentation électrique embarqué
DE102018209464A1 (de) * 2018-06-13 2019-12-19 Robert Bosch Gmbh Notenergiespeicher für ein Fahrzeug
DE102020126014B4 (de) 2020-10-05 2022-07-07 Elmos Semiconductor Se Verfahren zur Verhinderung der Nichtauslösung von Airbags durch Kurzschlüsse an Zuleitungen anderer Airbags

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709200A (en) * 1985-10-21 1987-11-24 Seiko Instruments & Electronics Ltd. Power source circuit
US5608269A (en) * 1994-05-26 1997-03-04 Temic Telefunken Microelectronic Gmbh Method for activating an output stage for safety systems in a motor vehicle
US6127804A (en) * 1999-09-10 2000-10-03 Oglesbee; John Wendell Lithium ion charging means and method using ionic relaxation control
US20010045814A1 (en) * 2000-05-25 2001-11-29 Torsten Gogolla Arrangement and method for generating high voltage from a low-voltage supply source
US6448784B1 (en) * 1997-07-29 2002-09-10 Siemens Aktiengesellschaft Configuration and method for testing a circuit apparatus provided for controlling an occupant protection device of a motor vehicle
US20020180268A1 (en) * 2000-05-31 2002-12-05 Bernhard Mattes Circuit arrangement for the power supply of protective devices for the passengers of a vehicle
US6777912B1 (en) * 1999-08-02 2004-08-17 Nissan Diesel Motor Co, Ltd. Power source system for driving vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8717831U1 (de) * 1987-12-30 1990-06-28 Robert Bosch Gmbh, 70469 Stuttgart Einrichtung zur Überprüfung einer Kapazität
DE19542085B4 (de) * 1994-12-30 2007-07-05 Robert Bosch Gmbh Sicherheitseinrichtung für Fahrzeuginsassen
DE19517698C2 (de) * 1995-05-13 1999-04-22 Telefunken Microelectron Verfahren zur Festlegung der Autarkiezeit eines sicherheitskritischen Systems in einem Fahrzeug zur Personenbeförderung nach dem Abschalten einer Versorgungsspannungsquelle
DE19715571C2 (de) * 1997-04-15 1999-03-18 Telefunken Microelectron Energieversorgungsgerät

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709200A (en) * 1985-10-21 1987-11-24 Seiko Instruments & Electronics Ltd. Power source circuit
US5608269A (en) * 1994-05-26 1997-03-04 Temic Telefunken Microelectronic Gmbh Method for activating an output stage for safety systems in a motor vehicle
US6448784B1 (en) * 1997-07-29 2002-09-10 Siemens Aktiengesellschaft Configuration and method for testing a circuit apparatus provided for controlling an occupant protection device of a motor vehicle
US6777912B1 (en) * 1999-08-02 2004-08-17 Nissan Diesel Motor Co, Ltd. Power source system for driving vehicle
US6127804A (en) * 1999-09-10 2000-10-03 Oglesbee; John Wendell Lithium ion charging means and method using ionic relaxation control
US20010045814A1 (en) * 2000-05-25 2001-11-29 Torsten Gogolla Arrangement and method for generating high voltage from a low-voltage supply source
US20020180268A1 (en) * 2000-05-31 2002-12-05 Bernhard Mattes Circuit arrangement for the power supply of protective devices for the passengers of a vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070289855A1 (en) * 2004-02-27 2007-12-20 Hartmut Schumacher Device for Supplying an Ignition Current from an Energy Reserve to at Least One Ignition Power Module
US8076795B2 (en) * 2004-02-27 2011-12-13 Robert Bosch Gmbh Device for supplying an ignition current from an energy reserve to at least one ignition power module
CN102884704A (zh) * 2010-05-04 2013-01-16 罗伯特·博世有限公司 用于驱动车辆的安全系统的控制器和用于驱动这种车辆的安全系统的方法
US9225201B2 (en) 2010-05-04 2015-12-29 Robert Bosch Gmbh Control unit for operating a safety system for a vehicle and method for operating such a safety system for a vehicle
CN103176053A (zh) * 2011-12-23 2013-06-26 鸿富锦精密工业（深圳）有限公司 电容容量及其寄生电阻测量电路
US11273781B2 (en) * 2017-05-05 2022-03-15 Continental Automotive Gmbh Method for triggering a plurality of actuators of a safety system of a motor vehicle from an energy source

Also Published As

Publication number Publication date
DE10255429A1 (de) 2004-06-09
WO2004051822A1 (fr) 2004-06-17
EP1565978A1 (fr) 2005-08-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONTI TEMIC MICROELECTRONIC GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HECKEL, MARKUS;KULESCH, MANFRED;REEL/FRAME:017043/0321

Effective date: 20050420

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION