Protective cover

Abstract

A protective cover 1 suitable for an energy storage arrangement, especially a battery (10, figure 3), comprises a cover section 2 connected to two side sections 3, a rear side section (4, figure 2) an

Description

The invention relates to a protective cover for an energy store arrangement. Battery-driven devices, such as machine tools, electric bicycles or similar are used increasingly in private households, craft producers, in public and industrial facilities, wherein the accumulators, thus the energy stores consisting of several energy store cells, are installed firmly in the tool or can be removed from same. Often, the devices or removed energy stores are arranged in a cabinet arrangement or shelf setup for charging, where they can be connected to a corresponding power supply and for example can be charged overnight, or are placed in the arrangement for storage purposes. Also, vehicle batteries are occasionally stored for example in workshops for storage purposes, at least temporarily, in cabinet arrangements or shelf setups, for charging or storage purposes. The named energy stores have stored energy of a few Wh up to 1 kWh. In particular, in the case of small device applications, even if the individual energy store does not have any excessively high charged energy content, storing several such energy stores can result in a quite considerable overall management, as a large number of energy stores can be introduced, self-evidently up to the maximum reception capacity of the cabinet arrangement or shelf setup. The cabinet arrangement or shelf setup with the introduced devices or energy stores is an energy store arrangement. A further example of the application of energy stores is fixed installed energy stores, via which electric appliances are operated. Energy store arrangements in which current or energy generated via an associated photovoltaic array are to be named merely by way of example. The design of such an energy store arrangement is variable; it can be a smaller device with a storage volume of only a few kWh, for example 8-14 kWh, as is customary in particular in private households, or correspondingly larger designed devices in the public and industrial sector. In most cases, the energy store arrangements are scalable, meaning they thus consist of several energy storage blocks, with each of them comprising a plurality of individual energy store cells. The individual energy storage blocks are regularly put together to form a cuboidal energy store arrangement, wherein the energy storage blocks can be connected either mechanically one below the other or can be arranged in a suitable cabinet arrangement or shelf setup. For example, lithium-ion cells are used as energy store cells for the above-various described storage types, but also other monovalent storage systems such as sodium-ion systems or multivalent systems, e.g. zinc- and aluminium-ion technology. Each battery has a plurality of energy store cells in which a corresponding amount of energy can be stored. The problem here is that a technical defect due to chemically bonded oxygen or hydrogen present in every energy store cell can on its own lead to a fire, deflagration or explosion when there is a corresponding impact of heat, or as a consequence of abnormal handling, wherein an individual burning cell of the battery can also cause adjacent cells to catch fire. The problem here is that such a burning battery cannot be extinguished with conventional extinguishing agents, such as a fire extinguisher. In the event of a vehicle battery catching fire, in order to be able to stem the spread of the fire and gain time until professional firefighters can arrive at the scene of the fire and fight it with corresponding means, it is known to place a special fire protection cover, also resistant to high temperatures, over the vehicle, which cover serves to cover the site or origin of the fire. Such a fire protection cover is described for example in DE 20 2020 104 975 U1. This fire protection cover consists of a woven glass fabric, covered in particular on both sides, for example with silicone, wherein the woven glass fabric is made of high temperature glass fibres and has a long-term heat resistance of at least 600°C or higher. A high-temperature-resistant woven glass fabric is used for such a fire protection cover, which fabric is woven from extremely temperature-resistant glass fibres. Glass fibres which ensure that the woven glass fabric and thus the fire protection cover itself has a long-term heat resistance of at least 600°C are used. By long-term resistance is meant in the present that the woven glass fabric and thus the fire protection cover can be exposed to a constant temperature of at least 600°C over a longer period of time, for example at least five minutes or longer, without suffering damage, consequently the woven glass fabric and therefore the fire protection cover is thus capable of providing its full extinguishing functionality during this period of time. This also enables such a fire protection cover to extinguish vehicle fires, whether for fuel-driven vehicles, electric vehicles or hybrid drive vehicles wherein, with such fires, the extinguishing process can on the one hand last longer than with other fires, and on the other hand there can be higher temperatures resulting from the combustion of motor fuel or the burning battery to which the fire protection cover is exposed over a longer period of time. Such a fire protection cover has a size of several square metres, e.g. 6 x 8 m up to 8 x 10 m, in order to cover the vehicle completely. However, such a fire protection cover is cumbersome for other applications and therefore does not offer sufficient protection. The problem of the invention is to provide an effective fire-protection possibility for an energy store arrangement, in particular comprising a cabinet arrangement or shelf setup with energy stores introduced therein. According to the invention, to solve this problem a protective cover for an energy store arrangement is provided, comprising a cover section which is connected to two side sections, a rear side section and a front side section, wherein a skirt-like opening section is provided at least at the front side section, which opening section can be detachably fixed to the front side section along at least one parting plane in a closed position via fixing means and, after loosening the fixing means, can be brought into an open position allowing access to the inside of the protective cover, wherein the cover section, the side sections, the rear side section and the front side section are made from a high-temperature-resistant woven fabric produced from interwoven strands with a long-term heat resistance of at least 750°C. The shape of the protective cover according to the invention is adapted to the usually cuboidal energy store arrangement, which makes it possible for the protective cover to be adapted, as well as possible, to the shape of the energy store arrangement when pulled or put over same, in so doing encasing the energy store arrangement. The cuboidal shape is predetermined either by the cabinet arrangement or shelf setup into which the energy store is introduced, or by the overall shape of the plurality of individual cuboidal energy stores arranged e.g. on top of one another. For this purpose, the protective cover has a cover section, two side sections, a rear side section and a front side section which are connected to form a common cover, which is cuboidal in shape, i.e. the individual sections are virtually at right angles to one another. A skirtlike opening section is provided at least at the front side section which, if needed, can be brought out of a closed position in which it is firmly connected to the front side section into an open position in which it is detached along at least one parting plane from the front side section, and consequently for example can be rotated to the side or upwards. Access to the energy store is possible via this opening section or the opening formed by opening same, with the result that corresponding operating elements and displays etc. are accessible in spite of fitted protective covers. In the closed position, the opening section is firmly connected to the front side section via suitable fixing means, resulting in a closed front side wall. A further opening section can self-evidently also be provided on other sections, e.g. one or both side sections, in order also to make possible access there. Should the energy store arrangement also be accessible from the rear, then it can also have an opening section on the rear side section. The protective cover according to the invention or its individual sections are made of a high-temperature-resistant woven fabric which has a long-term heat resistance of at least 750 °C, preferably more. This woven fabric can be made of glass fibres, carbon fibres, ceramic fibres, basalt fibres or silicate fibres. The woven fabric is designed such that, in addition to the temperature, it also resists a high pressure resulting from deflagration or detonation inside the energy store arrangement, as well as possible components or fragments which have been expelled due to a cell explosion. The fixing means via which the opening section is firmly connected to the front side section in the closed position are also designed to this effect. The sections can be made of the woven fabric in just one layer, but can also consists of two or more layers, wherein one layer is formed by the woven fabric. The protective cover according to the invention therefore makes possible the best possible protection against a warehouse fire spreading, while damage to items located in the environment by ejection of parts can also be avoided effectively. As a consequence of the high temperature resistance and long-term resistance, a possible fire can be fought for a long period of time using the protective cover according to the invention. On the one hand, the optimal fit allows for the protective cover to be arranged or placed over the energy store arrangement optimally, and on the other hand allows for complete enclosure of the energy store arrangement, with the result that this is also actually fully covered. As described, when one or more of them are provided, every opening section can be brought out of its closed position into an open position to open the protective cover. Preferably for this, the opening section is reversibly detachable along parting planes running vertically in the assembly position from its connection to the front side section which has been obtained via the fixing means. According to this embodiment, the opening section is skirt-like and extends preferably over almost the whole height of the front side section, thus from the bottom edge to almost the top edge, with the result that the front side section can be opened as extensively as possible. The parting planes run vertically in the region of the left-hand and right-hand edge of the front side section, with the result that the opening section can be opened virtually from bottom to top or added to. Alternatively, only a parting plane running in a U-shape can be provided, with two vertical sections and one horizontal section. The two vertical sections run preferably again in the region of the left-hand and right-hand edge of the front side section, and the lower horizontal section in the region of the bottom edge of the front side section. The same also applies, self-evidently, to further opening sections provided on other sections. The fixing means are designed as described above, such that higher pressures developing in the inside of the cover are also withstood. Zip fasteners, hook-and-loop fasteners, press stud fasteners or screw cap fasteners guided through metal inserts, in particular provided in the opening section, in particular provided on the front side section, can be considered as fixing means. It is expedient when the opening section overlaps the front side section in the region of the one or more parting planes on the inside of the front side section. The fixing means are protected against heat and direct flame contact via an additional woven fabric plane by this overlapping at the inside of the front side section. The overlapping can relate only to the immediate region of the one or more parting planes but can also extend a little further. The same also applies, self-evidently, with respect to an overlap at other sections. In order to simplify opening it is conceivable that, after detaching the fixing means, the opening section can be brought into the open position via a pulling system of a "Roman blind" or "roller blind" type. Consequently, once they have detached the fixing means, by pulling on suitable correction means such as cords, the user can pull the detached opening section virtually upwards, with the result that the opening section gradually folds or rolls up and detaches the opening. In the open position, the pulling system can be locked in place suitably, with the result that the opening section remains in the open position, wherein the locking device can self-evidently be detached for closing. If no such pulling system is provided, then the opening section can for example be rotated or rolled only upwards, thus from bottom to top or wound up to a roller, which then can be fixed in the opening position via suitable fastening means such as for example a securing strap or hook-and-loop tape or similar. An expedient development provides that, one or more ventilation devices are provided, in particular at the cover section. A rapid exchange of gas and heat can be achieved via these ventilation devices, i.e. the hot gases or hot air respectively can reach the outside from the inside of the covers via the ventilation devices. It is conceivable that such a ventilation device is designed as a simple opening, in particular in the cover section. Alternatively, it is also conceivable that in such an opening a temperature-resistant insert, e.g. a metal grid or a metal filter, is inserted, or is sewn to the end with the woven fabric, with the result that the inside of the protective cover is not immediately accessible. In a development of the invention, it is provided that the protective cover is open at the bottom. This means that the protective cover is open in the lower region and virtually reaches the bottom only with the side sections, the rear side section and the front side section and is adjacent thereto. This is particularly expedient as this makes it possible for excess pressure produced in the manner of an explosion to be able to be deflected outwards quickly, as well as for hot gases from explosions or fire gases to be able to be discharged downwards via the open base, with the result that the temperature inside the cover does not rise excessively. A "thermal runaway" of the energy store can be counteracted as a result. As already described, the woven fabric itself can be made of glass fibres, carbon fibres, silicate fibres, ceramic fibres or basalt fibres, which are interwoven or bonded in any bond type. Mixtures of two or more different fibres for forming the woven fabric are also conceivable. Although glass fibres, silicate fibres and metal strands are mentioned here in the plural, it is conceivable that this is a continuous filament which runs through the fabric in a meandering manner. A fibre or strand is located in the rows of woven fabric, which is why, when viewed in the longitudinal or transverse direction of the fabric, a plurality of fibres or strands is provided. The woven fabric itself can be provided with a coating on one or both sides. The woven fabric is coated appropriately, wherein this difficultly flammable coating serves primarily to close the woven fabric, thus to render the cover sections gas-tight as a whole, with the result that a fire source can virtually be sealed off against oxygen being pulled in belatedly, and consequently the fire source being able to be deprived of oxygen. As already described, the woven fabric can be made of glass fibres, but carbon fibres, ceramic fibres or basalt fibres are also conceivable. In such a case, preferably a silicone coating which coats the glass, carbon, ceramic or basalt woven fibre is applied as woven fabric coating, preferably on both sides, and this seals the pores of the woven fabric, with the result that the woven fabric becomes impervious. Self-evidently, the silicone coating also has the highest possible temperature resistance. Instead of a silicone resin coating, a polyurethane coating or a vermiculite coating can also be applied. Alongside this, as described the woven fabric can also be made of silicate fibres. A silicate fibre has a higher SiO2 proportion than a glass fibre, with the SiO2 proportion in a silicate fibre being at least 96 %. Such a silicate fibre has a clearly higher temperature resistance than a glass fibre. The coating applied to such a silicate woven fabric is preferably a vermiculite coating which also is preferably applied on both sides of the silicate woven fabric. Alternatively, a silicone coating or a polyurethane coating can also be applied here. It is possible to cover the two sides not with the same coating, but instead, as according to the invention, it can also be provided to equip both sides of the woven fabric with different coatings. A woven fabric made of glass, carbon, ceramic or basalt fibres can for example be provided with a silicone or polyurethane coating on one side, e.g. the front side, and with a vermiculite coating on the other side, e.g. the rear side. A silicate woven fabric can be provided on one side, e.g. the front side, with a silicone coating or a polyurethane coating, and on the other side, e.g. the rear side, with a vermiculite coating. Quasi-hybrid coatings or hybrid sections can thus be formed. In particular in the case of a vermiculite coating applied to one side of the woven fabric, gas proofness can be achieved via a silicone or polyurethane coating provided on the other side. The woven fabric can have a mass per unit area between 300 - 1200 g / m2, in particular between 550 - 1100 g / m2. This means that the highest possible mass per unit area, sometimes called weight per square metre or grammage, should be stated, with the result that as densely woven as possible a stable woven glass fabric is used. The functionality of a protective cover is influenced on the one hand by the temperature resistance or long-term heat resistance respectively of the fibres used or of the fabric, but also by the thickness or stability respectively of the woven fabric or the tightness of the mesh of the fabric, as these parameters influence the stability and tightness of the fabric. Therefore, the highest possible mass per unit area is preferred. The thickness of the woven fabric should be 0.4 -1.3 mm. All intermediate values covered by the stated intervals are expedient and considered to be disclosed as individual values. According to a preferred development it may be provided that metal strands are woven into the woven fabric. In addition to the woven fabric fibres, metal strands are accordingly woven into the woven fabric, wherein the metal strands are woven into the woven fabric preferably over the whole surface area. These metal strands, which can for example be a thin steel strand, serve to reinforce the heat-resistant woven fabric, with the result that the woven fabric made from the glass fibres, carbon fibres, basalt fibres, ceramic fibres or silicate fibres and metal strands is more robust against mechanical loads and less susceptible to cutting. Damage to the protective cover by a bursting pressure in the event of an explosion or exploding parts is itself also reduced due to the metal strands of the reinforcement, as the mechanical properties of the woven fabric are clearly improved due to the mechanical properties of the metal strands woven in over a large surface area. The metal strands are woven into the woven fabric. The woven fabric is generally made of warp and weft strands, wherein the metal strands are woven into the fabric either with the warp strands or the weft strands. The metal strands thus run together with the warp strands or the weft strands through the woven fabric, with the result that the metal strands can be introduced over the whole surface area of the woven fabric without problems. Two variants are conceivable with regard to the metal strands being introduced into the woven fabric. According to a first alternative, the metal strands can run parallel to the warp or weft strands. The metal strands are thus virtually guided along parallel to the respective strand and introduced into the woven fabric, while the metal strand is not firmly connected to any of the strands. Alternatively, it is conceivable that the metal strands are wound about the warp or weft strands. The respective strand is consequently designed as a wound strand about which the metal strand is wound, with the result that, when weaving in the warp or weft strand, the metal strand is inevitably also woven in alongside it as it is wound around the strand. A metal strand should have a diameter of between 5 - 25 pm, in particular between 6 - 20 pm. Very thin metal strands are thus introduced, which is entirely sufficient for the increase in stability achieved. All intermediate values covered by the stated diameter interval are expedient and considered to be disclosed as individual values. The fineness of a metal strand should be between 150 - 500 tex. The unit "tex" indicates the strand weight in grams per 1000 m. All intermediate values covered by the stated interval are expedient and considered to be disclosed as individual values. The metal strand itself can be a steel strand, but the use of other metal strands, based for example on a metal alloy, is also possible. Furthermore, the woven fabric can itself contain 18-22 warp strands per centimetre, in particular 19-20 warp strands per centimetre, and 10-15 weft strands per centimetre, in particular 11 -14 weft strands per centimetre. If, as provided according to the invention, the metal strand is guided along with the warp or weft strand, the metal strand is also present in a corresponding number. This means that when the metal strand is for example woven into the weft strand, the density or number of metal strands per centimetre corresponds to the number of warp strands per centimetre. All intermediate values covered by the stated interval are expedient and considered to be disclosed as individual values. Further advantages and details of the present invention can be seen from the embodiment examples described below, as well as from the drawings. There are shown in: Figure 1 a schematic diagram of a protective cover according to the invention in a perspective view from the front, Figure 2 the protective cover from Figure 1 in a perspective view from behind, Figure 3 a schematic diagram of the protective cover according to the invention and an energy store arrangement before the protective cover has been fitted, Figure 4 the arrangement from Figure 3 after the protective cover has been fitted, Figure 5 the arrangement from Figure 4 after the opening section has been detached and opened, Figure 6 a schematic diagram of the connection of the opening section to the front side section in the region of the two parting planes, Figure 7 an overview of the cover section showing ventilation devices, and Figure 8 a schematic diagram of a protective cover according to the invention of a further embodiment. Figures 1 and 2 show a protective cover according to the invention 1. This has a cuboidal shape and is made of a cover section 2, two side sections 3, a rear side section 4 and a front side section 5, which are connected to the cuboidal shape. Each section is made of one, or in the case of a multilayer structure, a woven fabric made of interwoven fibres or strands, which comprise warp strands and weft strands woven thereto. The woven fabric has a long-term heat resistance of at least 750 °C. The fibres or strands are for example glass fibres, carbon fibres, silicate fibres, ceramic fibres or basalt fibres, or a mixture of different fibres. Additionally, a metal strand which is thinner than the warp and weft strands, for example one made of stainless steel, can be laid or woven therein, wherein this metal strand is guided e.g. parallel to the weft strand, or is twisted together with same. The number of warp strands should be between 18-22 per centimetre, whereas the number of weft strands should be between 10 - 15 per centimetre. The mass per unit area should be 500 - 1200 g / m2. Additionally, the protective cover 1 or each section can be provided with a coating covering the woven fabric, which can be applied to one or both sides. This coat can be a silicone coating, a polyurethane coating or a vermiculite coating, wherein, when the coating is provided on both sides, different coatings can also be applied. The coatings are accordingly temperature-resistant and serve in particular to seal the woven fabric, with the result that air or oxygen is prevented from getting through the woven fabric. The individual sections can be produced separately and then correspondingly joined to one another, for example by sewing or sticking. Alternatively, it is also conceivable to make several or all sections also from a virtually single piece woven fabric and merely connect them to one another for example at the longitudinal edges running vertically. The protective cover 1 serves to cover or encase a similarly cuboidal energy store arrangement, thus corresponding in shape to the protective cover 1, to which end, as described below again, the protective cover 1, open at the bottom, is placed over the energy store arrangement. In the event of extreme heat developing, such as a possible fire or deflagration or even explosion of the energy store arrangement, it serves to protect the environment and for example prevent the fire from spreading. In order to be able to guide away gases being produced in such an event inside the protective cover, and in the event of a high pressure prevailing inside same, several ventilation devices 6, for example provided in the shape of simple openings or through holes, are provided on the cover section 2, which through holes or openings allow the exit of gas or hot air, like a pressure balance. This is also possible via the protective cover 1 open towards the bottom since, in the installation position, the protective cover 1 is adjacent to the ground with its bottom edge and is thus not connected either to the energy store arrangement or to the ground in a firm and gas-tight manner. In the installation position, the protective cover 1 encases the cuboidal energy store arrangement completely, thus at the top as well as on all sides. In order to make possible access to the inside and thus to the energy store arrangement, a skirt-like opening section 7, shown in a closed position in Figure 1, is provided at least in the front side section 5 in which the opening section is fixed via detachable fixing means 8, which can be zip fasteners, hook-and-loop fasteners, press stud fasteners or screw cap fasteners guided through metal inserts, in particular provided in the opening section 7, in particular provided on the front side section. These fixing means 8 can be detached, with the result that the skirt-like opening section 7 can be opened along two parting planes 9, here running vertically. It is completely detached at the bottom end, but at the top end remains connected to the front side section 5 or if necessary, also the cover section 2, depending on how far upwards the fixing means 8 or the parting planes 9 extend. Figure 3 shows on the one hand the protective cover 1 already described above, and on the other hand an energy store arrangement 10 which in the shown example is made of several separate storage blocks 11, each of which comprises a plurality of individual energy store cells, for example lithium-ion cells. Such an energy store arrangement 10 is consequently scalable and thus be constructed in different sizes and variably in terms of storage volume. In every case, the storage arrangement 10 is cuboidal. The individual storage blocks 11 can be directly connected to one another, for example via lateral connecting bars or similar, or they can be inserted into a shelf, not shown in more detail here, or in an assembly cabinet or similar. Alternatively, the energy store arrangement can be formed in the energy store via a cabinet or shelf system, which is small in shape and serves to operate machine tools, or the machine tools are themselves arranged for charging or storage purposes. In any case, the energy store arrangement 10, which then also includes such a shelf or assembly cabinet, has a cuboidal shape geared towards the shape of the protective cover 10. The length, width and height of the protective cover 1 is / are geared towards the dimensions of the energy store arrangement 10, as far as possible, with the result that the protective cover 10 can on the one hand easily be fitted thereupon, meaning that there is still sufficient air or gap between the protective cover 1 and the energy store arrangement 10, while on the other hand it is also not too unwieldy and does not project excessively at the sides. The protective cover 1 folds down to be small in shape when in the non-use position. By being folded up it can be brought into the form shown in Figure 3, in which it is then fitted from the top over the energy store arrangement 10, as shown by arrow P. Figure 4 shows the arrangement from Figure 3 after the protective cover has been fitted. Self-evidently, this engages around the energy store 10, which is open completely at its top as well as at the four sides, although this is shown only in dashed lines. The height of the protective cover 1 is dimensioned such that it projects with the lower edge on the bottom, with the result that there is a corresponding impression there. Nevertheless, the protective cover 1 is self-evidently not closed at the bottom, as it has to be fitted over the top. This openness at the bottom is furthermore advantageous to the extent that a corresponding gas and pressure equalisation can also take place via the bottom. The ventilation devices 6 are, as stated, on the cover section 2, and thus are above the energy store arrangement, with the result that the hot air and pressure can escape there too. As already described, the opening section 7, which self-evidently is also made from the same materials as the other sections, can be opened if necessary, i.e. an opening can be formed in the front side section via which access can be gained to the inside and thus to the energy store arrangement 10. For this it is necessary merely to detach the fixing means 8, regardless of what type they are, with the result that the skirt-like opening section 7 is detached from its fixed fastening to the front side section 5. If the fixing means 8 are e.g. two zip fasteners, then these are pulled from bottom to top in a simple manner, with the result that the two parting planes 9 are opened and the opening section 7 can be rolled upwards from the bottom. This situation is shown in Figure 5, where the opening section 7 has been rolled up to form a roll, and is fixed by means of suitable securing means 12, for example hook-and-loop tape, in the rolled-up or wound-up position in the region of the cover section 2. The individual storage blocks 11 appear to be accessible from the front side, at which there are usually located operating elements, displays or similar. If the protective cover 1 is intended to be closed again, then only the securing means 12 are to be detached, with the result that the opening section 7 falls back down. Subsequently, merely the zip fasteners are to be pulled back down, thus in order to close the fixing means 8, with the result that the opening section 7 is again firmly anchored in the front wall section 5. Additionally, opening sections can be provided in other sections as well, which opening sections are similarly designed or arranged. Figure 6 shows an enlarged partial view of the front side section 5 with the opening section 7 in the closed position. The fixing means 8, which here are designed by way of example like a zip fastener, are shown. In the closed position shown in Figure 6, the opening section 7 overlaps with two lateral overlapping sections 13 on the one hand at the inside the fixing means 8, and on the other hand, in sections, still the front side section 5. In the region of the fixing means 8, consequently an additional protective layer is placed over the overlapping sections 13, with the result that the fixing means 8 are protected against heat or fire from the inside. Figure 7 shows a top view of the protective cover 1, thus the cover section 2. By way of example, three differently designed ventilation devices 6 are shown, wherein the left-hand ventilation device 6 is designed as a simple through hole 14, thus as a simple hole which is designed in the cover section 2. This through hole extends consequently through the woven fabric and possibly also through the further layers provided it is a multilayer design. In order that the boundary of the through hole in the woven fabric or the layer structure is prevented from being torn out, the through hole 14 can be limited on the edge side for example by one or two metal rings fastened to the woven fabric, wherein these metal rings are connected to the woven fabric or the layer structure, for example are sewn, stuck or fastened via fastening elements such as rivets or the like. The central ventilation device 6 is provided by way of example with a ventilation grid 15, which is inserted into the through hole and closes this to a degree, with the result that no items can enter via here into the inner, while at the same time gas and heat equalisation is possible. The ventilation grid 15 is for example made of metal and connected to the woven fabric, for example sewn or stuck or fixed via rivets etc. in a suitable manner. The right-hand ventilation device 6 is for example provided with a filter 16 made of a high-temperature-resistant material, for example steel wool or carbon fibres or glass fibres etc. The filter 16 is for example received between two perforated metal halfshells, which for their part are firmly connected to the woven fabric, with the result that a gas and heat exchange is also possible via here, connected to a corresponding filter function with regard to possible small particles or similar. The different ventilation devices 6 in Figure 7 are shown merely by way of example. Self-evidently, the same ventilation devices 6 are provided on one protective cover 1; Figure 7 represents three different variants for reasons of representation. Figure 8 shows a further embodiment of a protective cover 1 according to the invention, in turn made of a cover section 2 with the ventilation devices 6, two side sections 3, a rear side section 4 not shown in more detail, as well as a front side section 5, on which in turn a movable, skirt-like opening section 7 is provided. This is in turn firmly but detachably connected to the front side section 5, via a fixing means 8, wherein the fixing means can in turn for example be a zip fastener, a hook-and-loop fastener or similar, as already described previously. Other than in the embodiment according to the present Figures, only one parting plane 9 is provided with here, and this is U-shaped, i.e. the fixing means 8 runs in a U-shape, with two vertical sections and one horizontal section. If the fixing means 8 is thus for example opened by the zip fastener, then this is for example pulled from top-right coming downwards, then to the left-hand side, and back upwards, with the result that the opening section 7 is detached and can be rolled upwards in a manner similar to that described for Figure 5. It is also closed again in the opposite direction. Although the preceding Figures describe the possibility that the opening section is manually rolled up after being detached, there is the possibility of providing a pulling system via which the detached opening section 7 is either folded like a Roman blind and pulled upwards, or is wound up, as shown in Figure 5, like a roller blind. For this, corresponding traction mechanisms such as straps or the like are provided, on which the user pulls after detaching the fixing means 8, at which point the detached opening section 7 is pulled upwards. In the open position, the traction mechanism is correspondingly fixed, and to close the protective cover 1 again, they are to be detached again and the opening section 7 left to go back down again.

Claims

2620Claims1. Protective cover for an energy store arrangement, comprising a cover section (2) which is connected to two side sections (3), a rear side section (4) and a front 5 side section (5), wherein the protective cover is open at the bottom, wherein a skirt-like opening section (7) is provided at least at the front side section (5), which opening section can be detachably fixed to the front side section (5) along at least one parting plane (9) in a closed position via fixing means (8) and, after loosening the fixing means (8), can be brought into an open position allowing10 access to the inside of the protective cover (1), wherein the cover section (2), the side sections (3), the rear side section (4) and the front side section (5) are made from a high-temperature-resistant woven fabric produced from interwoven strands with a heat resistance of at least 750°C.15 2. Protective cover according to claim 1, characterised in that the opening section(7) is reversibly detachable along parting planes (9) running vertically in the assembly position from its connection to the front side section (5) obtained via the fixing means (8).20 3. Protective cover according to claim 1 or 2, characterised in that the fixing means(8) are zip fasteners, hook-and-loop fasteners, press stud fasteners or screw cap fasteners guided through metal inserts.

4. Protective cover according to claim 3, characterised in that the fixing means are 25 provided in the opening section.

5. Protective cover according to claim 3 or 4, characterised in that the fixing means are provided on the front side section.30 6. Protective cover according to one of the preceding claims, characterised in thatthe opening section (7) overlaps the front side section (5) in the region of the one or more parting planes (9) on the inside of the front side section (5).06 02 267. Protective cover according to one of the preceding claims, characterised in that, after releasing the fixing means (8), the opening section (7) can be brought into the open position via a pulling system of a "Roman blind" or "roller blind" type.5 8. Protective cover according to one of the preceding claims, characterised in thatone or more ventilation devices (6) are provided.

9. Protective cover according to claim 8, characterised in that the one or more ventilation devices (6) are provided on the cover section (2).1010. Protective cover according to claim 8 or 9, characterised in that a ventilation device is designed in the form of an opening (14), or that an insert (15, 16) is arranged in the opening.1511. Protective cover according to one of the preceding claims, characterised in that the woven fabric is made of glass fibres, carbon fibres, silicate fibres, ceramic fibres or basalt fibres or mixtures thereof.20 12. Protective cover according to one of the preceding claims, characterised in thatthe woven fabric is provided with a coating on one or both sides.

13. Protective cover according to claim 12, characterised in that the coating is a silicone coating, a polyurethane coating or a vermiculite coating.2514. Protective cover according to claim 12 or 13, characterised in that the woven fabric is provided with different coatings on either side.

15. Protective cover according to one of the preceding claims, characterised in that30 the woven fabric has a unit weight of between 300 - 1200 g / m216. Protective cover according to one of the preceding claims, characterised in thatthe woven fabric has a unit weight of between 550 - 1100 g / m2.

17. Protective cover according to one of the preceding claims, characterised in that the woven fabric has a thickness of 0.4 - 1.3 mm.

18. Protective cover according to one of the preceding claims characterised in that metal strands are woven into the woven fabric.

19. Protective cover according to claim 18, characterised in that the metal strands are steel strands.06 02 2620. Protective cover according to claim 18 or 19, characterised in that the woven fabric is made of warp and weft strands, wherein the metal strands are woven into the fabric with the warp or weft strands.

21. Protective cover according to claim 20, characterised in that the metal strands run parallel to the warp or weft strands, or that the metal strands are wound around the warp or weft strands.

22. Protective cover according to one of claims 18 to 21, characterised in that the diameter of the metal strands is between 5 - 25 pm.

23. Protective cover according to one of claims 18 to 21, characterised in that the diameter of the metal strands is between 6 - 20 pm.

24. Protective cover according to one of claims 18 to 23, characterised in that the fineness of the metal strands is 150 - 500 tex.

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