WO2023083756A1

WO2023083756A1 - Fire prevention packaging

Info

Publication number: WO2023083756A1
Application number: PCT/EP2022/081003
Authority: WO
Inventors: Andreas Kütemeier; Momme Krahn
Original assignee: Kütemeier GmbH
Priority date: 2021-11-09
Filing date: 2022-11-07
Publication date: 2023-05-19

Abstract

The invention relates to fire prevention packaging (10) for electronic devices (100), in particular electrical energy stores, having a foldable, multi-layered textile composite (12) comprising, arranged one on top of the other: - a first textile layer (14), the first textile layer (14) comprising a first organic material and being at least partially designed to act as a first part of a hook and loop connection, - a second textile layer (16), the second textile layer (16) comprising a second organic material, and - a third textile layer (18), the third textile layer (18) comprising a third organic material, wherein a connection element (22) is arranged on the side of the third textile layer (18) facing away from the second textile layer (16), said connection element being designed to act as a second part of a hook and loop connection, wherein the fire prevention packaging (10) is designed to be able to be adapted reversibly and non-destructively detachably and at least partially form-fittingly to the shape of electronic devices (100) of different dimensions by folding the foldable, multi-layered textile composite (12) and connecting the connection element (22) to the first textile layer (14) in order to pack said electronic devices at least partially.

Description

fire protection packaging

Description

The invention relates to fire protection packaging for electronic devices, in particular electrical energy stores, and a corresponding method for fire protection of electronic devices, in particular electrical energy stores, with fire protection packaging according to the invention, for example during transport and/or storage.

Fire protection packaging for electronic devices, in particular electrical energy stores such as lithium-ion accumulators, is regularly used to protect the environment from fire hazards arising therefrom or to protect the electronic device from external combustion processes, for example fires or harmful fires. Electronic devices in particular, which include lithium-ion accumulators, regularly harbor risks with regard to a thermal runaway of the electrical energy store (sometimes also referred to as “thermal runaway”).

During the process of thermal runaway, an exothermic chemical reaction takes place within the electrical energy store, which results in overheating of the electrical energy store. This overheating can lead to excess pressure within the electrical energy store and thus cause the same to explode, with the resulting gases and cell components being able to ignite. The thermal runaway of the electronic device can be caused by external influences such as falls, Ambient temperature fluctuations or puncture, as well as internal processes such as deep discharge, overcharging or failure of the battery management system of the electronic device.

In the last decade, the number of electronic devices has increased significantly, especially in private households. This applies to both the number of mobile end devices, such as smartphones, tablets and laptops, and the number of other electrical energy storage devices in the home, such as batteries for e-bikes or other electronic household appliances.

Fire protection packaging for electronic devices can help to circumvent this problem and neutralize the corresponding sources of danger. The special advantages of fire protection packaging are particularly evident when the device is in a sensitive area. For example, if the electronic device is on a user's body, such as in a trouser pocket, the fireproof packaging can prevent physical harm to the user in the event of a thermal runaway. Other sensitive zones can be determined by the usage environment of the electronic device. The interior of an airplane is often just as sensitive a zone as the interior of a wooden house or a bedroom with large amounts of combustible materials.

Fire protection bags are known from the prior art, such as AT 17063 U1, which have an outer layer of flame-retardant material and can be closed by means of a single Velcro mechanism. EP 3 821 950 A1 also discloses fire blankets which can be folded into a pocket with a predefined size by means of a specific fold and several Velcro fasteners. In this context, however, it is regularly felt to be disadvantageous that corresponding fire protection packaging cannot be individually adapted to the size of different electronic devices. In this respect, when the electronic device is packaged, depending on its respective size, there is often a cavity within the fire protection packaging, unless there is a separate one Fire protection packaging with specific dimensions for different electronic devices can be used.

In the event of a thermal runaway, however, such an inclusion of air or oxygen within the fire protection packaging can be problematic, since the enclosed oxygen promotes the ignition of gases and cellulose within the fire protection packaging. In this respect, a large cavity with a corresponding air inclusion can promote a particularly exothermic reaction and an explosive release of reaction products in an undesired manner. As a result, a mechanical failure of the closure of the fire protection packaging, which is usually only very simply designed for cost reasons, is more likely, so that the spread of fire cannot be effectively prevented in this case.

In this respect, it would in principle be extremely desirable if fire protection packaging for electronic devices were available that can be easily adapted to a large number of different sizes of electronic devices without this adversely affecting the protective effect. In this case, one and the same fireproof packaging could in fact be used for different electronic devices, depending on the needs, thus providing the maximum possible protection for the user. In this context, it would be particularly desirable for the fire protection packaging to be sealed reliably for all dimensions, which can also withstand a far-reaching and abrupt gas expansion inside.

In addition, it is also regularly felt to be disadvantageous that the fire protection packaging known from the prior art does not allow electrical conductors, in particular charging cables, to be safely guided out of the interior of the packaging, at least not without significantly reducing the protective effect. However, users of fire protection packaging for electronic devices are regularly dependent on an electrical power supply from outside both during transport and during storage of the electronic devices, in particular mobile end devices such as smartphones. In addition, it is regularly perceived as a disadvantage that existing fire protection packaging is usually time-consuming and/or costly to produce and therefore often expensive for the end customer to purchase, especially if the end customer requires separate fire protection packaging with the optimal size for each electronic device .

It was the primary object of the present invention to eliminate or at least alleviate the disadvantages of the prior art described above.

In particular, it was the object of the present invention to specify fire protection packaging that allows electronic devices of different dimensions to be enveloped in a form-fitting manner, so that the inclusion of air within the fire protection packaging can be minimized.

In addition, it was an additional object of the present invention to specify the fire protection packaging with closure means which counteract an unintentional opening of the fire protection packaging even in the event of strong pressure and temperature fluctuations inside and thereby enable particularly pronounced protection.

It was a desirable specification that the fire protection packaging to be specified should be designed in such a way that an undesirable overpressure build-up inside is avoided and gas development inside can be slowly broken down over time. In addition, the undesired escape of sparks and/or solid objects, in particular the escape of glowing particles, from the fire protection packaging should be avoided.

In addition, it was an object of the present invention to specify fire protection packaging which forms excellent thermal insulation, so that electronic devices are protected from environmental influences, and ideally also allows gas management for gases diffusing through it. It was an additional task that the production of the fire protection packaging to be specified should be possible in a particularly time- and cost-efficient manner, whereby in particular it should also be possible to produce large quantities so that they can be offered at low cost.

In addition, it was an additional object of the present invention that the fire protection packaging to be specified should allow the advantageous functionality over a long period of time and should be resistant to damage, in particular due to mechanical stress as a result of falling or contact with sharp-edged objects.

In this respect, it was desirable that the fire protection packaging to be specified should also be easy to handle for laypersons, with no other packaging materials and/or locking mechanisms preferably being required.

In addition, it was an object of the present invention that the fire protection packaging to be specified should also allow safe charging of the electronic devices.

In addition, it was a secondary object of the present invention that the fire protection packaging to be specified should be able to be stored in a particularly space-saving manner and transported flexibly.

It was also an object of the present invention that the fire protection packaging to be specified should be particularly easy to clean, ideally using standard household appliances.

Finally, it was an object of the present invention to specify a method for fire protection of electronic devices, in particular electrical energy stores, with appropriate fire protection packaging.

The above-mentioned objects are solved by fire protection packaging as defined in the claims. Preferred configurations according to the invention result from the dependent claims and the following statements. Such features of fire protection packaging according to the invention, which are referred to below as preferred, are combined in particularly preferred embodiments with other features referred to as preferred. Combinations of two or more of the embodiments described below as being particularly preferred are therefore very particularly preferred. Also preferred are embodiments in which a feature identified as preferred to some extent is combined with one or more other features identified as preferred to some extent. Features of preferred methods result from the features of preferred fire protection packaging.

The invention relates to fire protection packaging for electronic devices, in particular electrical energy storage devices, with a foldable, multi-layered textile composite arranged one on top of the other: a first textile layer, the first textile layer comprising a first organic material and being at least partially set up to function as the first part of a Velcro connection, a second textile layer, wherein the second textile layer comprises a second organic material, and a third textile layer, wherein the third textile layer comprises a third organic material, wherein a connecting element is arranged on the side of the third textile layer facing away from the second textile layer, which is designed to to act as the second part of a Velcro connection, with the fire protection packaging being set up so that it can be reversibly and non-destructively detached by folding the foldable multilayer textile composite and connecting the connecting element to the first textile layer and can be adapted at least partially in a form-fitting manner to the shape of electronic devices of different dimensions , to at least partially wrap them. The fire protection packaging according to the invention is suitable for packaging electronic devices. This includes in particular the packaging of mobile devices, electrical energy storage devices and other electronic household appliances. Advantageously, several electronic devices can also be packed simultaneously with the fire protection packaging. It is clear to the person skilled in the art that the fire protection packaging according to the invention is suitable for use in many different situations, in particular when storing the electronic device in sensitive zones.

The fire protection packaging according to the invention comprises at least one foldable multi-layer textile composite, so that at least in principle there can also be several textile composites. The textile composite is formed from at least a first textile layer, a second textile layer and a third textile layer, which are arranged one above the other. However, further textile layers can also be provided, which advantageously serve to improve the fire resistance and/or to improve the locking properties.

According to the invention, the first textile layer comprises a first organic material, the second textile layer comprises a second organic material and the third textile layer comprises a third organic material. The respective textile layers are advantageously formed essentially completely from the respective organic material. The respective textile layers can also include other organic materials, in particular plastic materials.

According to the invention, a connecting element is arranged on the side of the third textile layer facing away from the second textile layer. There can also be several connection elements. According to the invention, the first textile layer is at least partially set up to function as the first part of a Velcro connection and the connecting element is set up to function as the second part of a Velcro connection. The first textile layer advantageously functions inherently as the first part of the Velcro connection.

According to the invention, the fire protection packaging is set up so that it can be folded by folding the foldable multilayer textile composite and connecting the Connecting element with the first textile layer can be reversibly and non-destructively detached and at least partially adapted to the shape of electronic devices of different dimensions in order to pack them at least partially. Advantageously, a number of electronic devices can also be packaged at the same time as a result.

The person skilled in the art understands that the electronic devices of different dimensions are not themselves part of the fire protection packaging according to the invention defined above, but merely serve to define the installation of the fire protection packaging according to the invention. Nevertheless, an electronic device is also disclosed below for all fire protection packaging according to the invention, which is at least partially, preferably completely, packed in a fire protection packaging according to the invention.

In principle, fire protection packaging according to the invention can be used for electronic devices of any type. However, it has proven to be particularly advantageous to use the fire protection packaging for mobile end devices and/or batteries, since these are particularly affected by the thermal runaway discussed above. In addition, such electronic devices are often in the immediate vicinity of the user and/or are used in sensitive areas, for example in the bedroom or on an airplane. Fire protection packaging is therefore preferred with regard to suitability, the electronic devices being selected from the group consisting of electrical energy storage devices, in particular lithium ion accumulators and electronic devices which include such electrical energy storage devices.

With a view to the design of the closure means in fire protection packaging according to the invention, in particular the connecting element, the inventors have identified certain features through which the advantages of the present invention are particularly effective. It has been shown here that the handling of the fire protection packaging is particularly easy if the connecting element is placed at a predetermined distance from the edge of the textile composite. The inventors have recognized that this is also particularly advantageous for optimizing the closing force required for high pressure or temperature fluctuations. In addition, the inventors were able to establish that rectangular, in particular strip-shaped, connecting elements result in particularly good sealing and adhesion properties. Namely, a fire protection packaging is preferred, wherein the connecting element is formed by a hook material, preferably a Velcro strip. Fire protection packaging is also preferred, with the connecting element being in the form of strips, with the connecting element preferably being arranged essentially parallel to a longitudinal edge of the foldable, multi-layer textile composite, with the connecting element preferably having a distance from the next longitudinal edge which is in the range of 0.5 up to 10%, preferably 1 to 5%, of the width of the foldable multilayer textile composite.

As explained above, it is advantageous for fire protection packaging according to the invention if the closure means can withstand high pressure and temperature fluctuations. This aspect is primarily influenced by the design of the locking means, but also by their position and geometry. To this extent, the inventors have succeeded in identifying particularly suitable parameters for the first textile layer. In this respect, fire protection packaging according to the invention is preferred, the first textile layer being at least partially designed as a felt strip or Velcro velour, preferably Velcro velour. Fire protection packaging according to the invention is also preferred, the first textile layer being 20% or more, preferably 30% or more, particularly preferably 50% or more, very particularly preferably 70% or more, moreover preferably 90% or more , is particularly particularly preferably completely set up to act as the first part of a Velcro connection.

According to the inventors, it is expedient to ensure reliable protection, especially in the event of explosions, to design the closure to be sufficiently strong can ensure adequate closure. Preferred is consequently a fire protection packaging according to the invention, wherein the first textile layer and the connecting element are designed in such a way that the reversible and non-destructively detachable connection has a peel strength in the range from 1.7 to 2.3 N/cm ² , preferably in the range from 1.9 to 2 1 N/cm ² , wherein the peel strength after 10000 closure cycles is preferably greater than 0.5 N/cm ² , particularly preferably greater than 0.8 N/cm ² . Additionally or alternatively, fire protection packaging according to the invention is preferred, wherein the first textile layer and the connecting element are designed in such a way that the reversible and non-destructively detachable connection has a shear strength in the range from 5 to 9 N/cm ² , preferably in the range from 6 to 8 N/cm ² , wherein the shear strength after 10,000 closure cycles is preferably greater than 4 N/cm ² , particularly preferably greater than 4.5 N/cm ² .

Even if it is basically possible to design the fire protection packaging according to the invention in different variants, for example with a circular or elliptical basic shape, the inventors believe that a rectangular basic shape of the fire protection packaging or the foldable multi-layer textile composite is the embodiment in which the advantages described above are achieved show particularly clearly. Accordingly, a fire protection packaging according to the invention is preferred, wherein the foldable multilayer textile composite has an essentially rectangular shape, wherein the length is preferably greater than the width. Fire protection packaging according to the invention is also preferred, in which the length of the foldable, multi-layer textile composite is in the range from 100 to 2000 mm, preferably in the range from 500 to 1200 mm, and/or the width of the textile composite is in the range from 50 to 1500 mm, preferably in the range from 250 to 850 mm.

With regard to the specific design of the foldable, multi-layered textile composite, it has basically proven to be an advantage if the individual textile layers of the textile composite have essentially the same dimensions, which in particular also has manufacturing advantages. In addition, it is ensured that the advantageous properties of the textile composite at all points of the fire protection packaging according to the invention exist in essentially the same way. It is also preferred if the individual textile layers of the textile composite are connected to one another, for example by quilting, sewing or gluing. In principle, it can also be a reversible, non-destructively releasable connection. However, preference is given to a connection which cannot be detached without being destroyed. This not only increases the robustness of the textile composite, but also promotes its longevity. In particular, however, this makes it possible in a particularly efficient manner to reliably fix all textile layers by fixing the first textile layer to the connecting element. Preference is given to fire protection packaging according to the invention, in which the dimensions of the first textile layer and/or the second textile layer and/or the third textile layer, preferably all textile layers, are 90% or more, preferably 95% or more, particularly preferably essentially completely Dimensions of the foldable multilayer textile composite correspond. Fire protection packaging is therefore also preferred, with the second textile layer covering the first textile layer by 50% or more, preferably by 70% or more, particularly preferably by 90% or more, very particularly preferably essentially completely, with the first textile layer and the second Textile layer are preferably connected to each other, particularly preferably quilted together. Preference is also given to fire protection packaging according to the invention, the third textile layer covering the first textile layer and the second textile layer by 50% or more, preferably by 70% or more, particularly preferably by 90% or more, very particularly preferably essentially completely, with the third Textile layer is preferably connected to the second textile layer or the second textile layer and the first textile layer, particularly preferably by quilting.

In the light of the above statements, various configurations are conceivable for the foldable multi-layer textile composite. However, it has proven to be advantageous if this is designed in such a way that only one textile layer of the textile composite of the fire protection packaging can come into contact with the electronic device during packaging. As a result, damage to the electronic device enclosed by the textile composite can be optimally prevented not only by a sufficiently soft first textile layer become. Rather, the flexibility in the selection of the materials of the other textile layers is also increased, for example because direct contact with chemicals escaping from the electronic device can be ruled out for them. Fire protection packaging according to the invention is therefore preferred, the fire protection packaging being designed such that the second textile layer and/or the third textile layer, preferably the second textile layer and the third textile layer, have no contact surface with the electronic devices when electronic devices are packaged. Fire protection packaging according to the invention is also particularly preferred, with the outermost layers of the foldable multilayer textile composite being formed by the first textile layer and the third textile layer.

A great advantage of the present invention can be considered that the textile layers can be formed from mixtures of several different materials. In this respect, optimal fire and pressure resistance can be achieved through the selection and, if necessary, combination of suitable materials. However, it has proven to be advantageous if the textile layers essentially consist entirely of a single organic material, in particular against the background of the most cost-efficient production possible and a significant influence on the properties of the respective textile layer by the material used. In this respect, a fire protection packaging according to the invention is preferred, the first textile layer being more than 50% by weight, preferably more than 70% by weight, particularly preferably more than 90%, very particularly preferably more than 99%, from the first organic material, based on the mass of the first textile layer. Fire protection packaging according to the invention is also preferred, the second textile layer being more than 50% by weight, preferably more than 70% by weight, particularly preferably more than 90%, very particularly preferably more than 99%, of the second organic material, based on the mass of the second textile layer. Preference is also given to fire protection packaging according to the invention, the third textile layer being more than 50% by weight, preferably more than 70% by weight, particularly preferably more than 90%, very particularly preferably more than 99%, from the third organic material, based on the mass of the third textile layer. With a view to the subsequent application, it is also preferred if the fire protection packaging according to the invention comprises further closure means in addition to the connecting element. These additional closure means can allow a positive fit around the electronic device to be fixed during packaging. In addition to the connecting element, the further closure means can also counteract an uncontrolled opening of the fire protection packaging, which could be caused, for example, by an explosion of the electronic device inside the fire protection packaging, or by a pressure and/or temperature change. In principle, various reversible and non-destructively releasable form-fitting and/or force-fitting closures can be considered for the additional, in particular textile, closure means. For example, further connecting elements, in particular hook fastener elements, can be present. Preferably, however, the closure means are in the form of straps, which not only allow for simple and efficient fixation, but which also offer good resistance to accidental opening, especially if they are suitably placed and guided around the fireproof packaging. Preference is therefore given to fire protection packaging according to the invention, one or more closure elements being arranged on the side of the third textile layer facing away from the second textile layer, the closure elements preferably being straps, particularly preferably straps with a hook-and-loop fastener, the closure elements being set up to at least partially form-fitting, preferably completely form-fitting, adaptation of the fire protection packaging to the shape of electronic devices by means of folding to fix the folding obtained.

In principle, the closure elements can be positioned differently on the third textile layer of the foldable multilayer textile composite. Advantageously, however, the closure elements are arranged in the edge area of the third textile layer, since this best supports the advantageous size variability when folded over and fixed. Accordingly, fire protection packaging according to the invention is preferred, wherein the closure element or elements is/are in the edge area of the third textile layer, preferably in the middle Edge region, are arranged, preferably on opposite sides of the third textile layer.

With a view to using the fire protection packaging as safely as possible by the user, it has proven to be particularly advantageous to use the one or more closure elements for fixing the folds of the foldable multilayer textile composite. The inventors found that in particular the provision of at least two closure elements on the foldable multilayer textile composite allows the fire protection packaging to be closed reliably and permanently, particularly in the event of a pressure and/or temperature change inside the fire protection packaging. Preferably, the first closure element is arranged on a first fold-over area and the second closure element on a second fold-over area, so that a folding over of the first fold-over area around electronic devices is fixed by the first closure element and a fold-over of the second fold-over area around the first fold-over area is fixed by the second closure element. Fire protection packaging according to the invention is therefore preferred, with the fire protection packaging comprising two or more closure elements which are arranged on opposite sides of the third textile layer in such a way that they lie in the fold-over areas of the fire-proof packaging, with the fold-over areas being designed to adapt to the shape of the fire protection packaging electronic devices to be folded over, the closure elements preferably being arranged on these envelope areas of the fire protection packaging in such a way that after folding over they are spaced apart from one another or at least partially adjoin one another. Alternatively or additionally, fire protection packaging according to the invention is preferred, with the closure elements preferably being arranged on these cover areas of the fire protection packaging in such a way that at least one closure element fixes all cover areas after folding.

Particularly preferred are those configurations of the fire protection packaging according to the invention which provide improved protection against thermal allow breakthroughs. In the event of thermal breakdowns in electrical energy stores, not only large amounts of thermal energy are released, but also large amounts of gases within a few seconds. In this respect, the inventors have recognized that the fire protection packaging must not be designed to be too gas-tight, in particular to be able to counteract a gradual pressure build-up and also to allow at least a slowed-down pressure build-up even in the event of an explosion. Accordingly, fire protection packaging according to the invention is preferred, wherein the foldable multilayer textile composite is gas-permeable, wherein the foldable multilayer textile composite preferably has a gas permeability according to DIN EN ISO 9237 at a test pressure of 200 Pa of 140 L/dm ² /min or more, measured through all textile layers , preferably 160 L/dm ² /min or more, more preferably 180 L/dm ² /min or more, most preferably 200 L/dm ² /min or more.

It is particularly advantageous if the fire protection packaging according to the invention enables good thermal insulation. In this way, not only can the electronic device be protected from thermal stresses in a synergistic manner, but also the environment from unwanted heat development in the event of a thermal runaway, so that the risk of fire can be reduced. Fire protection packaging according to the invention is therefore also preferred, the foldable multilayer textile composite having a thermal conductivity of 0.2 W/(m K) or less, preferably 0.1 W/(m K) or less, measured through all textile layers.

A further major advantage of the present invention can be seen in the fact that, in addition to the first, the second and the third textile layer, further textile layers can also be provided. These can advantageously supplement the advantages described above with additional properties or enhance existing performance characteristics. For example, additional textile layers can further minimize the risk of sparks and/or glowing particles breaking through the foldable multilayer textile composite. In addition, the fire resistance by further Textile layers are increased with higher melting temperatures and / or decomposition temperatures. It has proven to be particularly advantageous if the textile layers arranged inside the foldable multi-layer textile composite can form a barrier, in particular a fireproof barrier, when the temperature increases. In a preferred embodiment, the heating of the textile composite causes a chemical reaction of the textile layers located inside the textile composite, particularly preferably a charring of the same. In this respect, preference is given to fire protection packaging according to the invention, additionally comprising a fourth textile layer in the foldable multilayer textile composite and optionally further textile layers, the fourth textile layer being arranged between the first and the second textile layer or between the second and the third textile layer, with the fourth textile layer preferably having a fourth includes organic material. In principle, it is also conceivable that further layers are provided that are not textile layers, for example perforated metal foils, which can be preferred for some applications, in particular for the purpose of improved radiation shielding.

As explained above, the textile layers of the foldable multilayer textile composite can in principle be formed from several materials in order to achieve optimal fire and pressure resistance. However, it has also proven to be advantageous for the other textile layers to form these textile layers essentially completely from a single organic material. Accordingly, a fire protection packaging according to the invention is preferred, the fourth textile layer being more than 50% by weight, preferably more than 70% by weight, particularly preferably more than 90%, very particularly preferably more than 99%, from the fourth organic material, based on the mass of the fourth textile layer.

Felt-like materials are particularly favorable for the inner layers of the fire protection packaging according to the invention because of their thermal properties and gas permeability. Fire protection packaging according to the invention is therefore preferred, the second textile layer and/or the fourth textile layer, preferably the second textile layer, being a needle felt. The resistance of fire protection packaging according to the invention to high pressure and temperature fluctuations is an important advantage of the present invention. This resistance can be influenced above all by the choice of materials for the foldable, multi-layered textile composite. The inventors have succeeded in identifying particularly suitable parameters for the materials used. A high level of fire resistance, which is expressed in a high oxygen index (LOI), is particularly advantageous for the second textile layer, since it is comparatively close to the packaged electronic device, but unlike the first textile layer, neither a soft fitting of the electronic device nor a soft fitting Velcro function must fulfill. However, the inventors' experiments have shown that a certain degree of fire resistance is also desirable for the other textile layers. Fire protection packaging according to the invention is correspondingly preferred, the second organic material having an oxygen index (LOI) according to DIN EN ISO 4589 of 35 or more, preferably 40 or more, particularly preferably 45 or more. Fire protection packaging according to the invention is also preferred, the third organic material and/or the fourth organic material, preferably the third organic material, having an oxygen index (LOI) according to DIN EN ISO 4589 of 25 or more, preferably 30 or more.

In many cases, the first textile layer is expediently selected primarily according to its functionality, which is possible in a synergistic manner because the outer layers also include any decomposition products or melting of the first textile layer. In the case of the further layers in particular, however, it is particularly advantageous if the materials are selected in such a way that they can withstand the temperatures occurring in the event of a fire for as long as possible and release as few thermal decomposition products as possible. Fire protection packaging according to the invention is therefore also preferred, the first organic material and/or the second organic material and/or the third organic material and/or the fourth organic material, preferably the second organic material and/or the third organic material, having a melting temperature of 300°C or more, preferably 400°C or more. One is also preferred Fire protection packaging according to the invention, wherein the first organic material and / or the second organic material and / or the third organic material and / or the fourth organic material, preferably the second organic material and / or the third organic material, a decomposition temperature of 300 ° C or more, preferably 400°C or more.

In order to achieve optimum temperature and fire resistance for the fire protection packaging, the inventors have identified additional material parameters that can be used to select particularly suitable materials for the textile layers. Accordingly, fire protection packaging according to the invention is preferred, wherein the first textile layer and/or the second textile layer and/or the third textile layer have a coating, preferably a coating that increases fire resistance, and/or are filled with a filler, preferably silicon dioxide. Fire protection packaging according to the invention is also preferred, the second textile layer having a fire protection class according to DIN 4102 of B1, A2 or A1, preferably A2 or A1.

A major advantage of the present invention can be seen in the fact that electronic devices of different dimensions can be packaged in a form-fitting manner. In particular, both a first electronic device, for example a smartphone, and a second electronic device, for example a tablet, that differs in dimensions from the first electronic device, for example a tablet, can be packed in a fireproof manner by the user using the same fire protection packaging at the same time or one after the other. The fire protection packaging according to the invention is particularly preferably designed in such a way that three or more electronic devices varying in size can also be packed.

In many cases it is not necessary to pack all electronic devices in the household in fire protection packaging at all times. In order to ensure the greatest possible flexibility, however, it makes sense to change the dimensions and dimensions of the fire protection packaging according to the invention Positioning of the connecting elements to be interpreted in such a way that they can also be adapted to such electronic devices that differ greatly in their dimensions. In terms of suitability, fire protection packaging according to the invention is therefore preferred, with the fire protection packaging being set up so that it can be reversibly and non-destructively detached by folding the foldable multilayer textile composite and connecting the connecting element to the first textile layer and at least partially, preferably completely, positively to the shape of electronic devices of different dimensions can be adapted, the volume of which differs by 50% or more, preferably by 100% or more, particularly preferably by 150% or more, in order to pack them at least partially, preferably completely. In view of the usual mobile electronic devices, fire protection packaging according to the invention is preferred, with the fire protection packaging being set up so that it can be reversibly and non-destructively detached by folding the foldable multilayer textile composite and connecting the connecting element to the first textile layer and at least partially, preferably completely, with a positive fit can be adapted to the shape of electronic devices of different dimensions, the length and/or width and/or height of which differs by 2.5 cm or more, preferably by 5 cm or more, more preferably by 10 cm or more, in order to accommodate them to pack at least partially, preferably completely.

In the light of the above statements, the connecting element is of particular importance, in particular with regard to securing the closure of the fire protection packaging. In order to counteract an unintentional opening of the fire protection packaging in the event of high pressure and/or temperature changes, it has proven to be advantageous if the connecting element extends essentially completely along the length and/or width of the textile composite. Fire protection packaging according to the invention is preferred in this respect, with the connecting element extending over at least 30%, preferably at least 50%, particularly preferably at least 70%, particularly preferably essentially 100%, of the length of the foldable multi-layer textile composite. The inventors of the present invention have succeeded in identifying materials with the use of which the foldable multilayer textile composite of the fire protection packaging according to the invention can be produced in a particularly time- and cost-efficient manner, and with which fire protection packaging can be obtained that is particularly robust and durable. In particular, however, the specific choice of material makes it possible to design particularly high-performance fire protection packaging, which in particular also has a high mechanical resilience. Namely, a fire protection packaging according to the invention is preferred, wherein the first organic material is selected from the group consisting of natural fibers and plastic materials, preferably plastic fibers, particularly preferably polyamides and polyesters, very particularly preferably polyamides. In this respect, fire protection packaging according to the invention is also preferred, the second organic material being selected from the group consisting of natural fibers and plastic materials, in particular plastic materials, preferably polyacrylonitriles. Fire protection packaging according to the invention is also preferred, with the third organic material being selected from the group consisting of natural fibers and plastic materials, in particular plastic materials, preferably polyaramides, particularly preferably para-polyaramides and meta-polyaramides, with the third textile layer particularly preferably comprising other materials, preferably antistatic fibers . Fire protection packaging according to the invention is also preferred, the fourth organic material being selected from the group consisting of plastic materials, preferably polyaramids.

The invention also relates to a method for fire protection of electronic devices, in particular electrical energy stores with a preferred fire protection packaging according to the invention, for example during transport and/or storage, comprising the method steps: a) arranging an electronic device on the first textile layer of the foldable multilayer textile composite, b) Folding a first fold area of the foldable multi-layer textile composite around the electronic device and folding a second fold area of the foldable multi-layer textile composite so that the second fold area rests on the first fold area and the connecting element arranged on the first fold area is connected to the first textile layer of the foldable multi-layer textile composite second fold area forms a reversibly and non-destructively releasable hook and loop connection, to obtain a partially positively packaged electronic device and laterally protruding cover areas of the foldable multilayer textile composite. c) folding a first cover area around the electronic device and fixing the obtained fold with a first closure element arranged on the first cover area, and d) folding a second cover area around the electronic device so that the second cover area overlaps the first cover area, and fixing the obtained fold with a second closure element arranged on the second flap region.

The method according to the invention is suitable for fire protection of electronic devices. This includes in particular the transport and/or storage of mobile devices, electrical energy storage devices and other electronic household appliances. It is clear to the person skilled in the art that the method can be used in many different situations, in particular when the electronic device is stored or transported in or through sensitive zones, for example in aircraft. By forming a reversible and non-destructively detachable Velcro connection between the fold areas of the fire protection packaging, which were wrapped around the electronic device to be packaged, a partially form-fitting packaged electronic device is obtained, with the laterally protruding foldable multi-layer textile composite areas remaining on the sides.

The electronic device is preferably positioned on the foldable multilayer textile composite in such a way that its longest edge is aligned parallel to the longitudinal edge of the textile composite. In a preferred In one embodiment, the partial form fit is achieved by the form-fitting folding of the first and second fold region of the textile composite along the transverse edges of the foldable multi-layer textile composite.

According to the invention, the method also includes folding the two cover areas around the electronic device and fixing the resulting fold with the closure elements arranged on the respective cover area.

The fold obtained is preferably fixed by the closure elements in such a way that if the pressure inside the fire protection packaging increases, the closure elements protect one another against opening, in particular against slipping off and/or being pressed on. The above method, like the fire protection packaging according to the invention, also offers the possibility of routing an electrical conductor, in particular a charging cable, from the inside of the fire protection packaging after the fire protection packaging has been closed and while retaining the advantages described above, in particular while retaining the fire protection properties of the fire protection packaging Outside.

Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. show:

1 shows a schematic representation of a fire protection packaging according to the invention in a preferred embodiment;

FIG. 2 shows a schematic exploded drawing of the foldable, multi-layer textile composite of the fire protection packaging according to the invention according to FIG. 1;

3 shows a schematic representation of a fire protection packaging according to the invention at a first point in time of the method according to the invention; 4 shows a schematic representation of a fire protection packaging according to the invention at a second point in time of the method according to the invention;

5 shows a schematic representation of fire protection packaging according to the invention at a third point in time of the method according to the invention;

6 shows a schematic representation of a fire protection packaging according to the invention at a fourth point in time of the method according to the invention;

7 shows a schematic representation of fire protection packaging according to the invention at a fifth point in time of the method according to the invention;

8 shows a schematic representation of fire protection packaging according to the invention at a sixth point in time of the method according to the invention.

1 shows a schematic representation of a preferred embodiment of a fire protection packaging 10. The fire protection packaging 10 is suitable for electronic devices 100, in particular electrical energy stores such as lithium-ion accumulators. The fire protection packaging 10 comprises a foldable multi-layer textile composite 12, which in the example shown is formed from a first textile layer 14, a second textile layer 16, a third textile layer 18 and a fourth textile layer 20, which is shown schematically in FIG. The fire protection packaging 10 also includes a connecting element 22 and a first closure element 24a and a second closure element 24b, which are arranged on the third textile layer 18.

The fire protection packaging 10 is designed to be reversibly and non-destructively adapted to the shape of electronic devices 100 of different dimensions by folding the foldable multilayer textile composite 12 and connecting the connecting element 22 to the first textile layer 14 in order to at least partially package them. The foldable multilayer textile composite 12 has an essentially rectangular shape with a width B in the range of 250 to 850 mm and a length L of 500 to 1200 mm, the ratio of length L to width B of the foldable multilayer textile composite 12 in the range of 1.3 to 2.0, with this ratio being able to be adjusted according to the intended use, for example to about 4.7 for energy storage devices in electric bicycles, for example. The dimensions of all textile layers essentially correspond to those of the foldable, multi-layer textile composite 12. The foldable, multi-layer textile composite 12 is gas-permeable with a gas permeability according to DIN EN ISO 9237 at a test pressure of 200 Pa of 180 L/dm ² /min and can have a thermal conductivity, measured through all textile layers, of less than 0.1 W/(m K). The outermost layers of the foldable multi-layer textile composite 12 are formed by the first textile layer 14 and the third textile layer 18, so that the second textile layer 16, the third textile layer 18 and the fourth textile layer 20 have no contact surface with the electronic devices 100 when packaging electronic devices 100 .

In the example shown, the first textile layer 14 is essentially made entirely of Velcro velor and is designed to function as the first part of a Velcro connection. The connecting element 22 is formed by a Velcro strip and is arranged parallel to the longitudinal edge of the foldable multi-layer textile composite 12 in its edge region. It essentially extends over the entire length of the foldable multi-layer textile composite 12 and is designed to function as the second part of the Velcro connection.

Together, the first textile layer 14 and the connecting element 22 are designed, for example, so that the reversible and non-destructively detachable Velcro connection between them has a peel strength in the range of 1.9 to 2.1 N/cm ² , with the peel strength being greater even after 10,000 closure cycles than 0.8 N/cm ² . In addition, the Velcro connection is designed, for example, to have a shear strength in the range of 6 to 8 N/cm ² , the shear strength after 10,000 preferably being even greater than 4.5 N/cm ² .

The second textile layer 16 is essentially completely formed by a needle felt made of pre-oxidized polyacrylonitrile (PAN), so that the second textile layer has a fire protection class according to DIN 4102 of B1. This organic material has a decomposition temperature of more than 400 °C and an oxygen index (LOI) according to DIN EN ISO of 45 or more.

The third textile layer 18 is formed essentially entirely from a blended fabric of para- and meta-aramids, with the fabric additionally comprising at least 1% antistatic fibers. The third textile layer has an oxygen index (LOI) according to DIN EN ISO 4589 of around 30 and a decomposition temperature of more than 400 °C.

The fourth textile layer 20 is essentially formed entirely by a needled felt made from para-aramids.

In FIG. 1 it can be seen that a first closure element 24a and a second closure element 24b are arranged on the third textile layer 18 in the middle edge region of the textile composite 12 on opposite sides adjoining the connecting element 22 . The closure elements are in the form of straps with a hook-and-loop fastener and are set up to fix the resulting fold after the fire protection packaging 10 has been completely fitted in a form-fitting manner to the shape of electronic devices 100 by means of folding. In the example shown, the Velcro fastener comprises a material with a Velcro hook and a Velcro loop. After said folding, the closure elements are arranged at a distance from one another and each fix at least that edge area of the textile composite on which they are arranged.

3 to 8 illustrate a preferred embodiment of the method according to the invention at different points in time. First, the fire protection packaging 10 according to FIG. 3 is spread out on a surface with the first textile layer 14 pointing upwards. This is followed by the arrangement of the electronic device 100, in this example a tablet, on the first textile layer 14 of the foldable multilayer textile composite, as shown in FIG.

The folding of a first folding area 28a of the foldable multilayer textile composite 12 around the electronic device 100 is illustrated in FIG. 5--starting from the state of FIG. The folding takes place in such a way that that section of the third textile layer 18 points upwards on the longitudinal edge of which the connecting element 22 is arranged.

Proceeding from this, FIG. 6 illustrates the folding of a second folding area 28b of the foldable multilayer textile composite 12 . The folding is done in such a way that the second folding area 28b rests on the first folding area 28a and the connecting element 22 arranged on the first folding area 28a forms a reversibly and non-destructively detachable Velcro connection with the first textile layer 14 of the foldable multilayer textile composite 12 in the second folding area 28b, so that a partially positively packaged electronic device 100 is obtained, from which laterally protruding envelope areas of the foldable multilayer textile composite 12 extend.

FIG. 7 shows the fire protection packaging 10 after a first folding area 26a has been folded around the electronic device 100 obtained from FIG. Here, the first closure element 24a is closed by the strap forming the closure element 24a being placed around the fold areas enclosing the electronic device 100 and being closed by means of the Velcro fastener attached to the strap.

Fig. 8 shows the electronic device 100 completely packaged with a form fit by the fire protection packaging 10. In order to achieve the complete form fit starting from Fig. 7, the second cover area 26b is folded over the electronic device 100 in such a way that the second cover area 26b covers the first cover area 26a overlaps. The fold obtained is fixed with the fold-over area 26b on the second arranged second closure element 24b, in that the strap forming the closure element 24b is placed around the first envelope region 26a enclosing the electronic device 100 and closed by means of the Velcro fastener attached to the strap.

Reference sign

10 fire protection packaging

12 foldable multi-layer textile composite

14 first layer of textile

16 second layer of textile

18 third layer of textile

20 fourth layer of fabric

22 fastener

24a, 24b closure element

26a, 26b turn-up area

28a, 28b folding area

100 electronic device

B Width of the textile composite

L Length of the textile composite

Claims

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Claims Fire protection packaging (10) for electronic devices (100), in particular electrical energy storage devices, with a foldable, multi-layer textile composite (12) arranged one on top of the other, comprising: a first textile layer (14), the first textile layer (14) comprising a first organic material and at least in part is set up to function as the first part of a hook and loop connection, a second textile layer (16), the second textile layer (16) comprising a second organic material, and a third textile layer (18), the third textile layer (18) comprising a third organic material, wherein a connecting element (22) is arranged on the side of the third textile layer (18) facing away from the second textile layer (16) and is set up to act as the second part of a Velcro connection, the fire protection packaging (10) being set up for this that by folding the foldable multi-layer textile composite (12) and connecting the connecting element (22) to the first textile layer (14), it can be reversibly and non-destructively detached and at least partially adapted to the shape of electronic devices (100) of different dimensions in order to to pack them at least partially. Fire protection packaging (10) according to claim 1, wherein on the side of the third textile layer (18) facing away from the second textile layer (16) one or more closure elements (24a, 24b) are arranged, the closure elements (24a, 24b) preferably belts, particularly preferably Belts with a Velcro fastener, the fastener elements (24a, 24b) being set up to be at least partially form-fitting, preferably completely form-fitting, adapting the fire protection packaging (10) to the shape of electronic devices (100) by means of folding, fixing the folding obtained.

3. Fire protection packaging (10) according to claim 2, wherein the one or more closure elements (24a, 24b) are arranged in the edge area of the third textile layer (18), preferably in the middle edge area, preferably on opposite sides of the third textile layer (18).

4. Fire protection packaging (10) according to one of claims 2 or 3, wherein the fire protection packaging (10) comprises two or more closure elements (24a, 24b) which are arranged on opposite sides of the third textile layer (18) such that these are in the flap areas (26a, 26b) of the fire protection packaging (10), the fold-over areas (26a, 26b) being designed to be folded over to adapt the shape of the fire protection packaging (10) to electronic devices (100), the closure elements (24a, 24b ) are preferably arranged on these fold-over areas (26a, 26b) of the fire protection packaging (10) in such a way that they are spaced apart from one another after folding or at least partially adjoin one another, and/or wherein the closure elements (24a, 24b) are preferably arranged on these fold-over areas ( 26a, 26b) of the fire protection packaging (10) are arranged in such a way that at least one closure element (24a, 24b) fixes all the fold-over areas (26a, 26b) after folding.

5. Fire protection packaging (10) according to one of claims 1 to 4, wherein the foldable multi-layer textile composite (12) is gas-permeable, wherein the foldable multi-layer textile composite (12), measured through all textile layers, preferably has a gas permeability according to DIN EN ISO 9237 at a test pressure of 200 Pa of 140 L/dm ² /min or more, preferably 160 L/dm ² /min or more, more preferably 180 L/dm ² /min or more, most preferably 200 L/dm ² /min or more. Fire protection packaging (10) according to one of Claims 1 to 5, additionally comprising a fourth textile layer (20) and optionally further textile layers in the foldable multilayer textile composite (12), the fourth textile layer (20) between the first and the second textile layer (16) or is arranged between the second and the third textile layer (18), wherein the fourth textile layer (20) preferably comprises a fourth organic material. Fire protection packaging (10) according to one of Claims 1 to 6, the fire protection packaging (10) being set up such that it can be attached reversibly and non-destructively detachable and at least partially, preferably completely, positively adapted to the shape of electronic devices (100) of different dimensions, the volume of which differs by 50% or more, preferably by 100% or more, particularly preferably by 150% or more in order to pack them at least partially, preferably completely. Fire protection packaging (10) according to any one of claims 1 to 7, wherein the connecting element (22) over at least 30%, preferably at least 50%, particularly preferably at least 70%, very particularly preferably in Substantially 100%, the length L of the foldable multi-layer textile composite (12) extends. Fire protection packaging (10) according to any one of claims 1 to 8, wherein the first organic material is selected from the group consisting of natural fibers and plastic materials, preferably plastic fibers, particularly preferably polyamides and polyesters, very particularly preferably polyamides, and / or wherein the second organic material is selected from the group consisting of natural fibers and plastic materials, in particular plastic materials, preferably polyacrylonitriles, and/or the third organic material is selected from the group consisting of natural fibers and plastic materials, in particular plastic materials, preferably polyaramides, particularly preferably para-polyaramides and meta-polyaramides, wherein the third textile layer (18) particularly preferably comprises other materials, preferably antistatic fibers. Method for fire protection of electronic devices (100), in particular electrical energy stores with fire protection packaging (10) according to one of claims 2 to 9, for example during transport and/or storage, comprising the method steps: a) arranging an electronic device (100). the first textile layer (14) of the foldable multilayer textile composite (12), b) folding a first fold area (28a) of the foldable multilayer textile composite (12) around the electronic device (100) and folding a second fold area (28b) of the foldable multilayer - 32 -

Textile composite (12), so that the second fold area (28b) rests on the first fold area (28a) and the connecting element (22) arranged on the first fold area (28a) with the first textile layer (14) of the foldable multilayer textile composite (12) in the second Folding area (28b) a reversible and non-destructive detachable

Velcro connection forms, to obtain a partially positively packaged electronic device (100) and laterally projecting envelope areas (26a, 26b) of the foldable multilayer textile composite (12). c) folding a first cover area (26a) around the electronic device (100) and fixing the fold obtained with a first closure element (24a) arranged on the first cover area, and d) folding a second cover area (26b) around the electronic device (100) so that the second fold-over area overlaps the first fold-over area, and fixing the fold obtained with a second closure element (24b) arranged on the second fold-over area.