Lighters without solid reaction products

Abstract

The present invention relates to a pyrotechnic protection device for an electrical energy storage device comprising a housing, wherein at least one igniter and at least one pyrotechnic charge connected to the igniter are present in the housing, wherein the pyrotechnic charge consists of organic substances or organic substances and metal-free nitrogen-containing inorganic salts so that after an ignition of the pyrotechnic charge initiated by the igniter, reaction products of the pyrotechnic charge are electrical non-conductors and the use of a pyrotechnic protection device.

Description

[0001] The present invention relates to a pyrotechnic protection device for an electrical energy storage device, comprising a housing, wherein at least one igniter and at least one pyrotechnic composition connected to the igniter are present in the housing.

[0002] Protective devices of the type mentioned above are already known from the prior art. Pyrofuses are known, for example, which comprise a combustion chamber containing a pyrotechnic charge to be ignited and a separate separation chamber in which any arc that may occur is extinguished. The separation of the combustion chamber from the separation chamber is used to prevent contamination of the separation gap with reaction products of the pyrotechnic charge. It is also known to filter the reaction products of the pyrotechnic charge and filter them out of the pyrotechnic protective device.

[0003] The published patent application DE 197 49 133 A1 shows a device for the defined and rapid switching of electrical high-current circuits, wherein the current-carrying conductor contains a pyrotechnic core which, after ignition, disintegrates the conductor in such a way that the current flow is reliably interrupted.

[0004] The published patent application DE 102011 012 773 A1 shows a gas generator with a combustion chamber in which a gas-generating propellant is accommodated, wherein the combustion chamber is delimited by a combustion chamber wall in which a weakening zone is provided, wherein an early ignition means is provided which has a lower ignition temperature than the propellant, and wherein the early ignition means is ignitable by a predefined, externally acting heat effect, wherein the weakening zone is already destructible by at least partial combustion of the early ignition means.

[0005] The present invention is based on the object of creating an improved pyrotechnic protection device which can be implemented in a particularly cost-effective and space-saving manner and which ensures a safe separation of an electrical connection when required.

[0006] The object underlying the invention is achieved by a protective device having the features of claim 1. According to the invention, the pyrotechnic composition consists of organic substances or organic substances and metal-free nitrogen-containing inorganic salts, so that after an ignition of the pyrotechnic composition initiated by the igniter, reaction products of the pyrotechnic composition are electrically non-conductors.

[0007] The pyrotechnic device is particularly suitable for efficiently deactivating battery systems, reliably insulating the battery system and preventing unwanted current flow. When triggered, the pyrotechnic device disconnects, for example, one or more electrical conductors of the battery system, resulting in a high separation resistance that reliably prevents unwanted current flow after the conductor(s) are separated. The device according to the invention ensures, in particular, that the electrical conductivity of the materials used in the pyrotechnic device and also of the battery system to be deactivated remains unchanged. The starting materials in the pyrotechnic composition are exclusively non-metallic substances.Due to the composition of the pyrotechnic composition, which consists either of organic substances only or of organic substances and non-metallic nitrogen-containing inorganic salts, reaction products of the pyrotechnic composition, which are electrically non-conductors, are advantageously formed after the ignition of the pyrotechnic composition initiated by the igniter. In particular, the starting materials are selected such that the reaction products of the pyrotechnic composition are soot-free. The substances used in the pyrotechnic composition of the pyrotechnic device according to the invention, as well as their reaction products, are all electrically non-conductors and thus have high electrical separation resistances, in particular separation resistances that prevent the flow of current, especially when they are deposited in the region of an electrical conductor to be separated.Due to the substances used and their reaction products, which are all electrically non-conductors, the pyrotechnic device according to the invention is less prone to failure and safer than known devices, for example devices comprising a mixture of ZPP, which consists of 35 to 45 wt.% potassium perchlorate and 55 to 65 wt.% zirconium powder, and TPP, which consists of 60 to 75 wt.% potassium perchlorate and 25 to 40 wt.% titanium powder (each based on the total weight of dry matter (DS)). The pyrotechnic device can be constructed more compactly and manufactured more cost-effectively than known pyrotechnic devices, since a separation, in particular a complex separation, of the combustion and separation chambers and / or the use of a fuse can be dispensed with due to the substances used and the resulting reaction products, which are each only electrically non-conductors.The pyrotechnic composition is preferably designed such that the reaction products of the pyrotechnic composition are gaseous, in particular completely gaseous and thus smoke-free, in particular soot-free. The gaseous reaction products preferably exit the device. As a result of the gaseous reaction products exiting the device, any arc that may have formed can be extinguished outside the device. The pyrotechnic composition is preferably designed such that the reaction products burn without leaving any residue; thus, after the pyrotechnic composition has burned off, no solid residues, in particular no soot residues, of the substances used in the pyrotechnic composition of the pyrotechnic device according to the invention remain in the pyrotechnic device according to the invention or in the switched-off battery system.Particularly preferably, the pyrotechnic composition is designed such that the reaction products are inert gases with high dielectric strength. Particularly preferably, the pyrotechnic composition is designed such that the reaction products consist of substances selected from the group consisting of carbon dioxide, nitrogen, water, carbon monoxide, hydrogen, and combinations thereof.

[0008] In a preferred embodiment, the pyrotechnic composition comprises, in particular consists of, at least one gelatinous explosive, a powdered explosive, or an emulsion explosive. By selecting at least one gelatinous explosive, a powdered explosive, or an emulsion explosive, individual requirements regarding the design, in particular the compactness, of a pyrotechnic protective device can be taken into account during production, and the explosive force can be adjusted as needed.

[0009] In a preferred embodiment of the present invention, the pyrotechnic composition comprises at least one organic substance selected from the group consisting of diaminodinitroethylene, trinitroazetidine, octanitrocubane, dihydroxylammonium-5,5'-bistetrazolyl-1,1'-diolate, 2,4-dinitrobenzene, 2,4-dinitrotoluene, 2,4-dinitrophenol, 2,4-dinitroanisole, dinitronaphthalene, trinitronaphthalene, methylammonium nitrate, tetramethylammonium nitrate, guanidine nitrate, nitramine, trinitrobenzene, trinitro-m-xylene, trinitro-m-cresol, trinitroanisole, trinitroaniline, hexanitrodiphenylamine, methyl nitrate, nitromethane, tetranitromethane, dinitrotetraoxadiazaisowurtzitane ammonium picrate, trinitrotoluene, trinitrophenol, tetryl (N-methyl-N,2,4,6-tetranitroaniline), ethylene glycol dinitrate, diethylene glycol dinitrate, triethylene glycol dinitrate, glyceryl trinitrate, pentaerythritol tetranitrate, cellulose nitrate, cellulose dinitrate, cellulose trinitrate, nitroguanidine, ethylene dinitramine, 1,3,5-trinitro-1,3,5-triazinan (hexogen),Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (octogen), dipicryloxide, dipicryl sulfide, hexanitrostilbene, hexanitroazobenzene, picrylaminodinitropyridine, nitrotriazolone, hexanitrohexaazaisowurtzitane, triaminotrinitrobenzene, diazodinitrophenol, tetrazene, hexamethylenetriperoxidediamine, acetone peroxide, and combinations thereof, in particular consists of these. By selecting at least one organic substance from the group of listed substances, a pyrotechnic protective device according to the invention is advantageously provided, in which both the reactants and the reaction products of the pyrotechnic composition are electrically non-conductors and form high separation resistances, in particular current-flow-preventing separation resistances. Preferably, such a selection of substances results in a substance or a substance composition at which a combustion temperature is reached that is sufficient for the reaction products to be gaseous.in particular, soot-free combustion takes place.

[0010] In a particularly preferred embodiment of the present invention, the pyrotechnic composition further comprises at least one organic substance selected from the group consisting of alginate, polyisobutene, bis(2-ethylhexyl) sebacate, oil, in particular mineral oil, vegetable oil and / or heating oil, wood flour, coal powder, paraffin, stabilizer, in particular diphenylamine and / or 1,3-diethyl-1,3-diphenylurea, and combinations thereof. The at least one organic substance advantageously ensures a more controlled, in particular soot-free, burning of the pyrotechnic composition. The at least one organic substance thus represents an additive to the other organic substances or organic substances and metal-free nitrogen-containing inorganic salts of the pyrotechnic composition of the pyrotechnic protective device according to the invention.

[0011] In a preferred embodiment of the present invention, the metal-free nitrogen-containing inorganic salt is ammonium nitrate. The use of ammonium nitrate advantageously yields gaseous reaction products that are electrically non-conducting.

[0012] In a preferred embodiment of the present invention, the pyrotechnic charge comprises at least one primary charge or at least one primary charge and a secondary charge, wherein the primary charge comprises, in particular consists of, at least one substance selected from the group consisting of diazodinitrophenol, tetrazene, hexamethylenetriperoxidediamine, acetone peroxide and combinations thereof. By using a primary charge, also referred to as an initial explosive charge, which is characterized by high sensitivity to friction, impact, shock and / or heating, a planned explosion can advantageously be initiated by a less reactive secondary charge. In addition, by selecting the substance or combinations of substances that are suitable for the primary charge, only reactants are provided and reaction products obtained that are electrically non-conductors, in particular gaseous, i.e. in particular soot-free, electrically non-conductors.

[0013] In a particularly preferred embodiment of the present invention, the secondary charge comprises at least one substance selected from the group consisting of cellulose nitrate, cellulose dinitrate, cellulose trinitrate, 1,3-diethyl-1,3-diphenylurea, nitroglycerin, diphenylamine, and combinations thereof. The use of a secondary charge increases the safety of the pyrotechnic protective device, since a secondary charge is only indirectly capable of causing an unplanned explosion. Furthermore, by selecting the substance or combinations of substances considered for the secondary charge, only reactants are provided and reaction products obtained that are electrically non-conductors, in particular gaseous, i.e., in particular, soot-free, electrically non-conductors.

[0014] In a particularly preferred embodiment of the present invention, the primary set comprises diazodinitrophenol, in particular consists thereof, and the secondary set comprises a composition A comprising, in particular consisting of, 70.0 to 99.8 wt.%, in particular 80.0 to 98.9 wt.% cellulose nitrate, 0.5 to 10.0 wt.%, in particular 1.0 to 5.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 5.0 wt.%, in particular 0.1 to 2.0 wt.% diphenylamine, a composition B comprising, in particular consisting of, 70.0 to 99.8 wt.%, in particular 80.0 to 99.0 wt.% cellulose nitrate, 0.1 to 10 wt.%, in particular 0.1 to 8 wt.% nitroglycerin, 0.1 to 5.0 wt.%, in particular 0.1 to 2.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 5.0 wt.%, in particular 0.1 to 2.0 wt.% diphenylamine or having a composition C, in particular consisting of 70.0 to 99.8 wt.%, in particular 80.0 to 98.9 wt.% cellulose nitrate and 0.1 to 5 wt.-%, in particular 0.1 to 2 wt.% diphenylamine (in each case based on the total weight of the respective composition), in particular consists thereof. The use of diazodinitrophenol as the primary charge and one of the compositions A to C as the secondary charge ensures controlled burning of the pyrotechnic charge, in which both the reactants and the reaction products are electrically non-conductors and thus unacceptable, i.e. in particular small, in particular too small, i.e. not preventing the flow of current, separation resistances can be advantageously avoided.

[0015] In a preferred embodiment of the present invention, the igniter is a bridge igniter or a glow bridge, in particular an electrical glow bridge, which is connected to connecting wires protruding from the housing and connected to a control, in particular an electrical one. The use of a bridge igniter or a glow bridge advantageously achieves temperatures at which the initiation of the combustion of the pyrotechnic composition is ensured while simultaneously being non-explosive, thus increasing the safety of the pyrotechnic device according to the invention.

[0016] In a preferred embodiment of the present invention, the igniter is an electrical glow bridge, and the resistance of the electrical glow bridge is between 1.7 and 2.5 ohms, in particular wherein the electrical glow bridge is a resistance wire made of PtW8, in particular having a diameter of 19 µm. By using an electrical glow bridge with a resistance between 1.7 and 2.5 ohms, which is in particular a resistance wire made of PtW8, in particular having a diameter of 19 µm, guidelines and / or standards, in particular the AK LV 16 guideline, can be advantageously adhered to.

[0017] In a preferred embodiment of the present invention, the housing has a predetermined breaking point. This increases the precision of the pyrotechnic protection device, as the housing breaks at the predetermined breaking point after the pyrotechnic protection device according to the invention is triggered. Particularly preferably, the housing has a lid. The lid simplifies the manufacture of the device, as the housing can be opened and closed with the aid of the lid and filled with the pyrotechnic composition more easily.

[0018] In a preferred embodiment of the present invention, the pyrotechnic device comprises a housing having a predetermined breaking point and a lid, wherein in the housing there is a PtW8 glow bridge with a diameter of 19 µm, the resistance of which is between 1.7 and 2.5 ohms and which is connected to connecting wires projecting from the housing and connected to an electrical control, and at least one pyrotechnic charge connected to the glow bridge, wherein the pyrotechnic charge comprises a primary charge and a secondary charge, wherein the primary charge consists of diazodinitrophenol, and the secondary charge consists of a composition A consisting of 80.0 to 98.9 wt.% cellulose nitrate, 1.0 to 5.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.% diphenylamine, a composition B consisting of 80.0 to 99.0 wt.% cellulose nitrate, 0.1 to 8 wt.% nitroglycerin, 0.1 to 2.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.-% diphenylamine or a composition C consisting of 80.0 to 98.9 wt.% cellulose nitrate and 0.1 to 2 wt.% diphenylamine (in each case based on the total weight of the respective composition), so that after ignition of the pyrotechnic composition initiated by the glow bridge, reaction products of the pyrotechnic composition are electrically non-conductors.

[0019] A further aspect of the present invention is the use of a pyrotechnic protection device according to the invention in an electrical device, in particular in a hybrid-electric or fully electric motor vehicle. The use of a pyrotechnic protection device according to the invention in a hybrid-electric or fully electric motor vehicle ensures that, after the pyrotechnic protection device has been necessary to burn off, a high isolating resistance, in particular one that prevents the flow of current, is present in the hybrid-electric or fully electric motor vehicle.

[0020] In the context of the present invention, "electrical insulator" is understood to mean a substance in which the density of free electrical charge carriers, i.e., electrons and / or ions, is very low, meaning that most charge carriers are tightly bound and thus exhibit no significant mobility. In particular, electrical insulators have an electrical conductivity of less than 10 under normal conditions. -8 S cm -1 and / or a specific resistance of more than 10 8 Ω·cm.

[0021] In the context of the present invention, "organic substance" is understood to mean a carbon-based substance which, in particular, contains, in addition to carbon, only elements selected from the group consisting of O, N, and H. Preferably, an organic substance in the context of the present invention does not contain any alkali metal, alkaline earth metal, transition metal, semimetal, metal, lanthanide, actinide, halogen, or noble gas. The reaction products of the organic substances are preferably gaseous, in particular at a temperature of more than 100°C, in particular selected from the group consisting of carbon dioxide, nitrogen, water, carbon monoxide, hydrogen, and combinations thereof.

[0022] In the context of the present invention, “metal-free” means that a substance does not contain any alkali metal, alkaline earth metal, transition metal, semi-metal or metal.

[0023] In the context of the present invention, "primary charge" also refers to an initial explosive or primary charge. A primary charge can preferably be detonated by a small mechanical or thermal impact. The primary charge preferably serves to initiate the burning of a secondary charge.

[0024] In the context of the present invention, "secondary charge" also refers to secondary explosives, secondary charges, or propellant charges. Preferably, a secondary charge is only indirectly capable of causing an unplanned explosion.

[0025] In the context of the present invention, "additive" is understood to mean at least one organic substance that is present in addition to other organic substances already present in the pyrotechnic composition. Preferably, an additive is a stabilizer of the other organic substances present in the pyrotechnic composition.

[0026] If quantitative information, in particular percentage information, of components of a product or composition is given in connection with the present invention, these add up to 100% of the composition and / or product together with the other explicitly stated or expertly apparent further components of the composition or product, unless explicitly stated otherwise or apparent to a person skilled in the art.

[0027] Further advantages and preferred features and combinations of features emerge from the claims and what is described above.

[0028] The invention will be explained in more detail below with reference to the drawing, which is not to be understood as limiting. The drawing shows in a Figure a pyrotechnic protective device.

[0029] The figure shows a schematic representation of an exemplary structure of an advantageous pyrotechnic protection device 1 for an electrical energy storage device (not shown). The protection device 1 has a housing 2. The housing 2 contains at least one igniter 3 and at least one pyrotechnic charge 4 connected to the igniter 3. The pyrotechnic charge 4 consists of organic substances or organic substances and metal-free, nitrogen-containing inorganic salts, so that after ignition of the pyrotechnic charge 4 initiated by the igniter 3, reaction products of the pyrotechnic charge 4 are electrically non-conductors.Due to the composition of the pyrotechnic composition 4, which consists either of only organic substances or of organic substances and non-metallic nitrogen-containing inorganic salts, reaction products of the pyrotechnic composition 4 are advantageously formed after the ignition of the pyrotechnic composition 4 initiated by the igniter 3. These reaction products are electrically non-conductors, i.e., reaction products that produce high separation resistances, particularly those that prevent the flow of current. Due to the substances used and their reaction products, which are all electrically non-conductors, the pyrotechnic device 1 is less prone to failure and safer than known devices, for example, those containing a mixture of ZPP and TPP.Due to the advantageous design of the protective device 1, it can be constructed more compactly and thus manufactured more cost-effectively than known pyrotechnic protective devices, since a separation, in particular a complex separation, of the combustion and separation chambers and / or the use of a fuse can be dispensed with due to the substances used and the reaction products obtained, which are each only electrical non-conductors.

[0030] The pyrotechnic composition 4 preferably comprises at least one primary composition 41 and a secondary composition 42, wherein the primary composition 41 comprises at least one substance selected from the group consisting of diazodinitrophenol, tetrazene, hexamethylenetriperoxidediamine, acetone peroxide, and combinations thereof, in particular consisting of diazodinitrophenol. The secondary composition 42 preferably comprises at least one substance selected from the group consisting of cellulose nitrate, cellulose dinitrate, cellulose trinitrate, 1,3-diethyl-1,3-diphenylurea, nitroglycerin, diphenylamine, and combinations thereof, in particular consisting of cellulose nitrate. The secondary set 42 preferably comprises a composition A comprising, in particular consisting of, 80.0 to 98.9 wt.% cellulose nitrate, 1.0 to 5.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.% diphenylamine, a composition B comprising, in particular consisting of, 80.0 to 99.0 wt.% cellulose nitrate, 0.1 to 8 wt.-% nitroglycerin, 0.1 to 2.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.% diphenylamine or a composition C comprising, in particular consisting of, 80.0 to 98.9 wt.% cellulose nitrate and 0.1 to 2 wt.% diphenylamine (in each case based on the total weight of the respective composition), in particular consisting thereof.

[0031] Preferably, the igniter 3 is a bridge igniter or a glow bridge, in particular an electrical glow bridge, which is connected to connecting wires 5 projecting from the housing and connected to a, in particular electrical, control, in particular the igniter 3 is an electrical glow bridge and the resistance of the electrical glow bridge is between 1.7 and 2.5 ohms, in particular the electrical glow bridge is a resistance wire made of PtW8, in particular having a diameter of 19 µm. List of reference symbols 1 Pyrotechnic protective device 2 housings 3 detonators 4 pyrotechnic set 41 Primary sentence 42 Secondary clause 5 connecting wires 6 lids QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 197 49 133 A1

[0003] DE 102011 012 773 A1

[0004]

Claims

[1] Pyrotechnic protection device (1), in particular for an electrical energy storage device, comprising a housing (2), wherein in the housing (2) there are at least one igniter (3) and at least one pyrotechnic composition (4) connected to the igniter (3), characterized by that the pyrotechnic composition (4) consists of organic substances or organic substances and metal-free nitrogen-containing inorganic salts, so that after ignition of the pyrotechnic composition (4) initiated by the igniter (3), reaction products of the pyrotechnic composition (4) are electrically non-conductors. [2] Pyrotechnic protective device (1) according to claim 1, characterized by that the pyrotechnic composition (4) comprises, in particular consists of, at least one gelatinous explosive, a powdery explosive or an emulsion explosive. [3] Pyrotechnic protection device (1) according to one of claims 1 or 2, characterized bythat the pyrotechnic composition (4) contains at least one organic substance selected from the group consisting of diaminodinitroethylene, trinitroazetidine, octanitrocubane, dihydroxylammonium 5,5'-bistetrazolyl-1,1'-diolate, 2,4-dinitrobenzene, 2,4-dinitrotoluene, 2,4-dinitrophenol, 2,4-dinitroanisole, dinitronaphthalene, trinitronaphthalene, methylammonium nitrate, tetramethylammonium nitrate, guanidine nitrate, nitramine, trinitrobenzene, trinitro-m-xylene, trinitro-m-cresol, trinitroanisole, trinitroaniline, hexanitrodiphenylamine, methyl nitrate, nitromethane, tetranitromethane, dinitrotetraoxadiazaisowurtzitane ammonium picrate, trinitrotoluene, trinitrophenol, tetryl (N-methyl-N,2,4,6-tetranitroaniline), ethylene glycol dinitrate, diethylene glycol dinitrate, triethylene glycol dinitrate, glycerol trinitrate, pentaerythritol tetranitrate, cellulose nitrate, cellulose dinitrate, cellulose trinitrate, nitroguanidine, ethylene dinitramine, 1,3,5-trinitro-1,3,5-triazinan (Hexogen), Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (Octogen),Dipikryloxide, dipicyclyl sulfide, hexanitrostilbene, hexanitroazobenzene, picrylaminodinitropyridine, nitrotriazolone, hexanitrohexaazaisowurtzitane, triaminotrinitrobenzene, diazodinitrophenol, tetrazene, hexamethylenetriperoxidediamine, acetone peroxide and combinations thereof, in particular consisting thereof. [4] Pyrotechnic protective device (1) according to claim 3, characterized by that the pyrotechnic composition (4) further comprises at least one organic substance selected from the group consisting of alginate, polyisobutene, sebacic acid bis(2-ethylhexyl) ester, oil, in particular mineral oil, vegetable oil and / or heating oil, wood flour, coal powder, paraffin, stabilizer, in particular diphenylamine and / or 1,3-diethyl-1,3-diphenylurea, and combinations thereof. [5] Pyrotechnic protection device (1) according to one of the preceding claims, characterized by that the metal-free nitrogen-containing inorganic salt is ammonium nitrate. [6] Pyrotechnic protection device (1) according to one of the preceding claims, characterized by that the pyrotechnic charge (4) comprises at least one primary charge (41) or at least one primary charge (41) and one secondary charge (42), wherein the primary charge (41) comprises, in particular consists of, at least one substance selected from the group consisting of diazodinitrophenol, tetrazene, hexamethylene triperoxide diamine, acetone peroxide and combinations thereof. [7] Pyrotechnic protective device (1) according to claim 6, characterized by that the secondary charge (42) comprises at least one substance selected from the group consisting of cellulose nitrate, cellulose dinitrate, cellulose trinitrate, 1,3-diethyl-1,3-diphenylurea, nitroglycerin, diphenylamine and combinations thereof. [8] Pyrotechnic protection device (1) according to one of claims 6 or 7, characterized bythat the primary set (41) comprises diazodinitrophenol, in particular consists thereof, and the secondary set (42) comprises a composition A, in particular consisting of 80.0 to 98.9 wt.% cellulose nitrate, 1.0 to 5.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.% diphenylamine, a composition B, in particular consisting of 80.0 to 99.0 wt.% cellulose nitrate, 0.1 to 8 wt.% nitroglycerin, 0.1 to 2.0 wt.% 1,3-diethyl-1,3-diphenylurea and 0.1 to 2.0 wt.% diphenylamine or a composition C, in particular consisting of 80.0 to 98.9 wt.% cellulose nitrate and 0.1 to 2 wt.% diphenylamine (each based on the total weight the respective composition), in particular consisting of it. [9] Pyrotechnic protection device (1) according to one of the preceding claims, characterized bythat the igniter (3) is a bridge igniter or a glow bridge, in particular an electrical glow bridge, which is connected to connecting wires (5) projecting from the housing and connected to a, in particular electrical, control. [10] Pyrotechnic protective device (1) according to claim 9, characterized by that the igniter (3) is an electrical glow bridge and the resistance of the electrical glow bridge is between 1.7 and 2.5 ohms, in particular wherein the electrical glow bridge is a resistance wire made of PtW8, in particular having a diameter of 19 µm. [11] Use of a pyrotechnic protection device (1) according to one of claims 1 to 10 in an electrical device, in particular in a hybrid electric or fully electric motor vehicle.

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