DE102009023801A1 - Safety device for disconnecting high voltage battery in e.g. electric vehicle from electric circuit during short circuit, has safety fuse connected parallel to pyrotechnical fuses, and series resistor connected upstream to safety fuse - Google Patents

Safety device for disconnecting high voltage battery in e.g. electric vehicle from electric circuit during short circuit, has safety fuse connected parallel to pyrotechnical fuses, and series resistor connected upstream to safety fuse Download PDF

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Publication number
DE102009023801A1
DE102009023801A1 DE200910023801 DE102009023801A DE102009023801A1 DE 102009023801 A1 DE102009023801 A1 DE 102009023801A1 DE 200910023801 DE200910023801 DE 200910023801 DE 102009023801 A DE102009023801 A DE 102009023801A DE 102009023801 A1 DE102009023801 A1 DE 102009023801A1
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Prior art keywords
fuse
safety
pyrotechnical
safety fuse
fuses
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DE200910023801
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German (de)
Inventor
Jean-Marc Dipl.-Ing. Virgin (FH)
Hassan Dipl.-Ing. Kablaoui (FH)
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Mercedes Benz Group AG
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Daimler AG
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Priority to DE200910023801 priority Critical patent/DE102009023801A1/en
Publication of DE102009023801A1 publication Critical patent/DE102009023801A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • 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
    • 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
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/106—Adaptation for built-in fuses fuse and switch being connected in parallel

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The device has a safety fuse (1) connected parallel to pyrotechnical fuses (3, 4), and a series resistor (2) connected upstream to the safety fuse. The pyrotechnical fuses have two pyrotechnical fuse elements that are arranged in series. Ohmic resistances of the pyrotechnical fuses are 10 times smaller than the ohmic resistance of the series connection of the safety fuse and the series resistor, where the series resistor has the ohmic resistance of 1 milliohm. A measuring shunt (7) is connected upstream to terminal contacts (5, 6) and is evaluated by electronics (8).

Description

Die vorliegende Erfindung betrifft eine Sicherungsvorrichtung zur Unterbrechung eines Stromkreises mit einer pyrotechnischen Sicherung und einer Schmelzsicherung, die parallel zu der pyrotechnischen Sicherung geschaltet ist. Speziell zielt die vorliegende Erfindung auf eine Hochvolt-Trennung (HV-Trennung) insbesondere von Hochvolt-Batterien (HV-Batterien) im Kurzschlussfall. Optional kann die Sicherungsvorrichtung auch für den Zellschutz und eine Abschaltung verwendet werden. Vorzugsweise soll eine schnelle und sanfte Abschaltung gewährleistet werden können.The The present invention relates to a safety device for interruption a circuit with a pyrotechnic fuse and a Fuse parallel to the pyrotechnic fuse is switched. Specifically, the present invention is directed to a High-voltage separation (HV separation), especially of high-voltage batteries (HV batteries) in the event of a short circuit. Optionally, the security device can also be used for cell protection and shutdown. Preferably, a quick and gentle shutdown is guaranteed can be.

Bekannt ist beispielsweise das Abschalten einer Stromquelle durch eine Schmelzsicherung. Eine Schmelzsicherung kann jedoch im Normalbetrieb bei zu hoher Strombelastung altern. Dadurch ändert sich die Sicherungseigenschaft in der Regel negativ.Known is, for example, the shutdown of a power source by a fuse. A However, fuse can in normal operation at too high current load aging. This changes the backup property to usually negative.

Aus dem Dokument US 2008/0137253 A1 ist eine Sicherungsvorrichtung bekannt, die ein Schmelzelement und parallel dazu eine pyrotechnische Sicherung besitzt. Die Sicherungsvorrichtung dient insbesondere für Kraftfahrzeuge und speziell für Kabel, die hohe Ströme führen.From the document US 2008/0137253 A1 a security device is known which has a fusible element and in parallel a pyrotechnic fuse. The safety device is used in particular for motor vehicles and especially for cables that carry high currents.

Weiterhin beschreibt das Dokument DE 199 15 594 A1 ein kompensiertes Sicherungselement für elektrische Anlagen zur Absicherung von mindestens einem Verbraucheranschluss. Das Sicherungselement besitzt mindestens eine Schmelzsicherung und mindestens eine Kaltleitersicherung. Die gegenläufigen Kennlinien der Schmelzsicherung und der Halbleitersicherung kompensieren sich und ermöglichen dadurch ein zuverlässigeres Auslöseverhalten des Sicherungselements. Das Sicherungselement ist besonders geeignet für elektrische Anlagen in Fahrzeugen.Furthermore, the document describes DE 199 15 594 A1 a compensated fuse element for electrical installations to protect at least one consumer connection. The fuse element has at least one fuse and at least one PTC fuse. The opposing characteristics of the fuse and the semiconductor fuse compensate each other and thereby enable a more reliable tripping behavior of the fuse element. The fuse element is particularly suitable for electrical systems in vehicles.

Ferner offenbart die Druckschrift DE 10 2006 007 960 A1 eine Fahrzeugmotor-Steuervorrichtung für einen Elektro-Fahrzeug-Motor. Die Steuereinrichtung umfasst mindestens ein elektronisches Schaltelement mit mindestens einem pyrotechnischem Anzünder, welcher in Abhängigkeit eines Unfallwarnsignals auslösbar ist. Eine derartige Steuervorrichtung kann für eine Fahrzeugbatterie verwendet werden.Further, the document discloses DE 10 2006 007 960 A1 a vehicle engine control device for an electric vehicle engine. The control device comprises at least one electronic switching element with at least one pyrotechnic igniter which can be triggered as a function of an accident warning signal. Such a control device may be used for a vehicle battery.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine schnelle und sanfte Abschaltung einer Hochvolt-Batterie im Kurzschlussfall sowie optional Zellschutz und Abschaltung ermöglichen zu können.The Object of the present invention is a fast and gentle shutdown of a high-voltage battery in the event of a short circuit as well as optional cell protection and shutdown allow too can.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Sicherungsvorrichtung nach Anspruch 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.According to the invention this object is achieved by a safety device according to Claim 1. Advantageous developments of the invention will become apparent from the dependent claims.

Es wird also eine Sicherungsvorrichtung zur Unterbrechung eines Stromkreises mit einer pyrotechnischen Sicherung und einer Schmelzsicherung, die parallel zu der pyrotechnischen Sicherung geschaltet ist, bereitgestellt. Ein Vorwiderstand ist vor die Schmelzsicherung geschaltet. Damit wird der Strom durch die Schmelzsicherung während des Normalbetriebs reduziert und der Alterungsprozess der Schmelzsicherung wird verlangsamt. Damit kann die Lebensdauer der gesamten Sicherungsvorrichtung erhöht werden.It So is a backup device for interrupting a circuit with a pyrotechnic fuse and a fuse, the connected in parallel with the pyrotechnic fuse provided. A series resistor is connected in front of the fuse. In order to The current through the fuse during normal operation reduces and the aging process of the fuse is slowed down. This can increase the life of the entire security device become.

Vorteilhafterweise besitzt die pyrotechnische Sicherung zwei pyrotechnische Sicherungselemente in Serie. Darüber hinaus ist es vorteilhaft, wenn der ohmsche Widerstand der pyrotechnischen Sicherung mindestens um den Faktor 10 kleiner ist als der Ohmsche Widerstand der Serienschaltung von Schmelzsicherung und Vorwiderstand. Insbesondere kann der Vorwiderstand einen Ohmschen Widerstand von 1 mOhm besitzen. Speziell kann ein Kraftfahrzeug mit einer Hochvolt-Batterie, an die eine derartige Sicherungsvorrichtung geschaltet ist, bereitgestellt werden. Die Sicherungsvorrichtung dient dann zum Trennen der Hochvolt-Batterie oder eines Teils davon von dem übrigen Stromkreis im Kurzschlussfall oder bei Überlast.advantageously, the pyrotechnic fuse has two pyrotechnic fuse elements in Series. In addition, it is advantageous if the ohmic Resistance of the pyrotechnic fuse at least by a factor 10 is smaller than the ohmic resistance of the series connection of Fuse and resistor. In particular, the series resistor have an ohmic resistance of 1 mOhm. Specifically, a Motor vehicle with a high-voltage battery to which such Secured device is connected, are provided. The Safety device is then used to disconnect the high-voltage battery or part of it from the rest of the circuit in the event of a short circuit or overload.

Die vorliegende Erfindung ist anhand der beigefügten Zeichnungen näher erläutert, in denen zeigen:The The present invention is described with reference to the accompanying drawings explained in more detail, in which show:

1 den prinzipiellen Aufbau einer erfindungsgemäßen Sicherungsvorrichtung wiedergibt und 1 the basic structure of a security device according to the invention reproduces and

2 eine abgewandelte Sicherungsvorrichtung. 2 a modified security device.

Die nachfolgend näher geschilderten Ausführungsbeispiele stellen bevorzugte Ausführungsformen der vorliegenden Erfindung dar.The Below described embodiments represent preferred embodiments of the present invention represents.

Wie bereits erwähnt soll mit der erfindungsgemäßen Sicherungsvorrichtung eine Absicherung von HV-Batterien gegen einen Kurzschluss und optional gegen Überlastung der Zellen gewährleistet werden können.As already mentioned with the invention Securing device a hedge of HV batteries against a Short circuit and optionally against overloading of the cells are guaranteed can.

Zur Abschaltung wird eine Parallelschaltung aus einer HV-Schmelzsicherung 1 in Reihe mit einem Hochleistungsvorwiderstand 2 und einer pyrotechnischen Sicherung 3, 4 aus dem Pkw-Bereich verwendet. Die Anschlusskontakte 5, 6 der Sicherungsvorrichtung besitzen einen möglichst großen effektiven Querschnitt von z. B. 50 mm2. Gegebenenfalls ist der gesamten Sicherungsanordnung an einem Anschlusskontakt 5 ein Messshunt 7 vorgeschaltet, der durch eine Elektronik 8 ausgewertet werden kann.The shutdown is a parallel connection of a HV-fuse 1 in series with a high power resistor 2 and a pyrotechnic fuse 3 . 4 used from the car area. The connection contacts 5 . 6 the securing device have the largest possible effective cross section of z. B. 50 mm 2 . Optionally, the entire fuse arrangement is at a terminal contact 5 a measuring shunt 7 upstream, the through an electronics 8th can be evaluated.

Der Innenwiderstand der Schmelzsicherung 1 beträgt beispielsweise 0,035 mOhm. Ihre Spannungsfestigkeit liegt vorzugsweise bei 750 V. Der Vorwiderstand 2 besitzt beispielsweise einen Ohmschen Widerstand von 1 mOhm. Der Ohmsche Widerstand beider pyrotechnischer Sicherungselemente 3 und 4 zusammen beträgt hier 0,095 mOhm. Der Widerstand in dem Zweig der Schmelzsicherung 1 beträgt somit etwas mehr als 1 mOhm, während der Widerstand in dem pyrotechnischen Zweig etwas weniger als 0,1 mOhm beträgt. Demnach ist der Ohmsche Widerstand in dem Zweig der Schmelzsicherung 1 um mehr als den Faktor 10 höher als in dem pyrotechnischen Zweig. Dies hat zur Folge, dass im normalen Betriebsfall die Stromstärke des durch die pyrotechnischen Sicherungselemente 3, 4 hindurchfließenden Stroms 9 wesentlich höher ist als die Stromstärke des durch die Schmelzsicherung 1 hindurchfließenden Stroms 10. Aufgrund dieser verminderten Stromstärke durch die Schmelzsicherung 1 im normalen Betriebsfall ist der Alterungsprozess dieser Schmelzsicherung 1 vermindert.The internal resistance of the fuse 1 is for example 0.035 mOhm. Their dielectric strength is preferably 750 V. The series resistor 2 has, for example, an ohmic resistance of 1 mOhm. The ohmic resistance of both pyrotechnic fuse elements 3 and 4 together here is 0.095 mOhm. The resistance in the branch of the fuse 1 is thus slightly more than 1 mOhm, while the resistance in the pyrotechnic branch is slightly less than 0.1 mOhm. Thus, the ohmic resistance is in the branch of the fuse 1 more than a factor of 10 higher than in the pyrotechnic branch. This has the consequence that in normal operation, the current through the pyrotechnic fuse elements 3 . 4 flowing current 9 is much higher than the current through the fuse 1 flowing current 10 , Because of this reduced current through the fuse 1 In normal operation, the aging process of this fuse 1 reduced.

Um, wie erwähnt, eine Belastung der Schmelzsicherung 1 durch Betriebsströme zu vermeiden, ist der Vorwiderstand 2 vor die Schmelzsicherung 1 geschaltet. Dieser Vorwiderstand 2 ist hinsichtlich seines Ohmschen Widerstands und seiner Leistung so auszulegen, dass er auf die maximalen Kurzschlussströme, Induktivitäten im Gesamtsystem und die Widerstände von Schmelzsicherung 1 und pyrotechnischer Sicherung 3, 4 abgestimmt ist.To, as mentioned, a load of the fuse 1 to avoid by operating currents, is the series resistor 2 in front of the fuse 1 connected. This resistor 2 Its Ohmic Resistance and Performance must be designed to be responsive to the maximum short circuit currents, inductors in the overall system and the resistors of the fuse 1 and pyrotechnic fuse 3 . 4 is tuned.

Die Sicherungen müssen von der Auslösecharakteristik so beschaffen sein, dass nach Auslösung der pyrotechnischen Sicherung 3, 4 ein Auslösen der Schmelzsicherung 1 trotz Vorwiderstand 2 gewährleistet wird.The fuses must be of the tripping characteristic so that after triggering the pyrotechnic fuse 3 . 4 a triggering of the fuse 1 despite series resistance 2 is guaranteed.

Da die pyrotechnische Sicherung 3, 4 alleine nicht in der Lage ist, hohe Ströme bei gleichzeitig hoher Spannung zu unterbrechen (Lichtbogen), übernimmt die eigentliche Trennung des HV-Kreises die Schmelzsicherung 1.Because the pyrotechnic fuse 3 . 4 alone is not able to interrupt high currents with high voltage (arc), the actual separation of the HV circuit takes over the fuse 1 ,

Die Elektronik 8 dient der Überwachung der Ströme und Spannungen einer HV-Batterie und löst im Kurzschlussfall beziehungsweise auch im Überlastungsfall die pyrotechnische Sicherung 3, 4 aus. Zu berücksichtigen dabei sind auch EMV-Störungen und Störungen durch Starkströme, die durch Umrichter verursacht werden und mit dem integrierten Messshunt 7 zu messen sind. Nach dem Auslösen der pyrotechnischen Sicherung 3, 4 ergibt sich ein erhöhter Strom durch die Schmelzsicherung 1. Dadurch trennt auch die Schmelzsicherung 1 und ein etwaiger Lichtbogen wird gelöscht. Mit dieser Löschung des Lichtbogens wird ein sanftes Abklingen des Stroms erreicht, das mit der Trennung des Hauptstromkreises durch die pyrotechnische Sicherung eingeleitet wurde.The Electronic 8th is used to monitor the currents and voltages of a HV battery and triggers the pyrotechnic fuse in the event of a short circuit or overload 3 . 4 out. Also to be considered are EMC interference and interference caused by high currents caused by the inverter and the integrated measuring shunt 7 to measure. After triggering the pyrotechnic fuse 3 . 4 results in an increased current through the fuse 1 , This also disconnects the fuse 1 and any arc is deleted. This arc extinction achieves a smooth decay of the current initiated with the disconnection of the main circuit by the pyrotechnic fuse.

Abhängig von der Spannungslage kann die pyrotechnische Sicherung auch nur ein einziges pyrotechnisches Sicherungselement 3 oder mehrere in Reihe geschaltete pyrotechnische Sicherungselemente umfassen. In 2 ist der Fall dargestellt, dass die Sicherungsvorrichtung ein einziges pyrotechnisches Sicherungselement 3 besitzt. Die übrigen Elemente entsprechen denen des Beispiels von 1.Depending on the voltage level, the pyrotechnic fuse can also only a single pyrotechnic fuse element 3 or more series connected pyrotechnic fuse elements. In 2 the case is shown that the safety device a single pyrotechnic fuse element 3 has. The other elements correspond to those of the example of 1 ,

In vorteilhafter Weise kann durch den erfindungsgemäßen Aufbau der Sicherungsvorrichtung eine Erhöhung der Trennfähigkeit von pyrotechnischen Sicherungen im Kurzschlussfall erreicht werden. Außerdem können innere Schmelzsicherungen eingesetzt werden, ohne dass eine starke thermische Alterung zu befürchten wäre.In Advantageously, by the inventive Structure of the safety device an increase in the ability to separate be achieved by pyrotechnic fuses in the event of a short circuit. In addition, internal fuses can be used be feared without a strong thermal aging would.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - US 2008/0137253 A1 [0003] US 2008/0137253 A1 [0003]
  • - DE 19915594 A1 [0004] - DE 19915594 A1 [0004]
  • - DE 102006007960 A1 [0005] - DE 102006007960 A1 [0005]

Claims (5)

Sicherungsvorrichtung zur Unterbrechung eines Stromkreises mit – einer pyrotechnischen Sicherung (3, 4) und – einer Schmelzsicherung (1), die parallel zur pyrotechnischen Sicherung (3, 4) geschaltet ist, dadurch gekennzeichnet, dass – der Schmelzsicherung (1) ein Vorwiderstand (2) vorgeschaltet ist.Safety device for interrupting a circuit with - a pyrotechnic fuse ( 3 . 4 ) and - a fuse ( 1 ) parallel to the pyrotechnic fuse ( 3 . 4 ), characterized in that - the fuse ( 1 ) a series resistor ( 2 ) is connected upstream. Sicherungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die pyrotechnische Sicherung (3, 4) zwei pyrotechnische Sicherungselemente in Serie aufweist.Safety device according to claim 1, characterized in that the pyrotechnic fuse ( 3 . 4 ) has two pyrotechnic security elements in series. Sicherungsvorrichtung nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass der Ohmsche Widerstand der pyrotechnischen Sicherung (3, 4) mindestens um den Faktor 10 kleiner ist als der Ohmsche Widerstand der Serienschaltung von Schmelzsicherung (1) und Vorwiderstand (2).Safety device according to claim 1 or 2, characterized in that the ohmic resistance of the pyrotechnic fuse ( 3 . 4 ) is at least a factor of 10 smaller than the ohmic resistance of the series circuit of fuse ( 1 ) and resistor ( 2 ). Sicherungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Vorwiderstand (2) einen Ohmschen Widerstand von 1 mOhm hat.Safety device according to one of the preceding claims, characterized in that the series resistor ( 2 ) has an ohmic resistance of 1 mOhm. Kraftfahrzeug mit einer Hochvolt-Batterie, an die eine Sicherungsvorrichtung nach einem der vorhergehenden Ansprüche so geschaltet ist, dass die Sicherungsvorrichtung im Kurzschlussfall oder bei Überlast die Hochvoltbatterie oder einen Teil davon von dem übrigen Stromkreis trennt.Motor vehicle with a high-voltage battery to the a security device according to one of the preceding claims is switched so that the safety device in the event of a short circuit or overload the high-voltage battery or a part it separates from the rest of the circuit.
DE200910023801 2009-06-03 2009-06-03 Safety device for disconnecting high voltage battery in e.g. electric vehicle from electric circuit during short circuit, has safety fuse connected parallel to pyrotechnical fuses, and series resistor connected upstream to safety fuse Withdrawn DE102009023801A1 (en)

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DE200910023801 DE102009023801A1 (en) 2009-06-03 2009-06-03 Safety device for disconnecting high voltage battery in e.g. electric vehicle from electric circuit during short circuit, has safety fuse connected parallel to pyrotechnical fuses, and series resistor connected upstream to safety fuse

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EP3244429A1 (en) * 2016-05-11 2017-11-15 Cooper Technologies Company Modular circuit protection systems and methods
US20170330714A1 (en) * 2016-05-11 2017-11-16 Cooper Technologies Company Pyrotechnic circuit protection systems, modules, and methods
DE102017207736B3 (en) 2017-05-08 2018-08-23 Leoni Bordnetz-Systeme Gmbh Pyrotechnic circuit breaker and supply network with a pyrotechnic circuit breaker
FR3071659A1 (en) * 2017-09-26 2019-03-29 Arianegroup Sas PYROTECHNIC CUTTING DEVICE
FR3071660A1 (en) * 2017-09-26 2019-03-29 Arianegroup Sas PYROTECHNIC CUTTING DEVICE
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AT521150A4 (en) * 2018-05-24 2019-11-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnic current separator
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US11670937B2 (en) 2019-02-22 2023-06-06 Eaton Intelligent Power Limited Coolant connector having a chamfered lip and fir tree axially aligned with at least one o-ring
US11978980B2 (en) 2019-02-14 2024-05-07 Eaton Intelligent Power Limited Hazardous environment electrical feedback barrier device, assembly, system and method

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DE102006007960A1 (en) 2006-02-21 2007-09-06 Volkswagen Ag Controller preventing fire and electric shock after electric vehicle crashes, includes electronic switch with pyrotechnic device detonated when crash deceleration is detected
US20080137253A1 (en) 2003-08-08 2008-06-12 George Terry A Circuit Interruption Device

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Publication number Priority date Publication date Assignee Title
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Cited By (62)

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Publication number Priority date Publication date Assignee Title
DE102012209138A1 (en) 2012-05-31 2013-12-05 Robert Bosch Gmbh Method for aging determination of fuse in battery system connected to propulsion system of e.g. motor car, involves measuring flowing stream of fuse of battery system by battery control device
US10361048B2 (en) * 2016-05-11 2019-07-23 Eaton Intelligent Power Limited Pyrotechnic circuit protection systems, modules, and methods
KR102413545B1 (en) * 2016-05-11 2022-06-27 이턴 인텔리전트 파워 리미티드 Flame circuit protection systems, modules and methods
CN109313998A (en) * 2016-05-11 2019-02-05 伊顿智能动力有限公司 Pyrotechnic circuit protection system, module and method
WO2017196535A1 (en) * 2016-05-11 2017-11-16 Cooper Technologies Company Pyrotechnic circuit protection systems, modules, and methods
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