Protective cover

Abstract

Protective cover. Protective cover intended for an energy storage assembly, comprising a cover part (2), which is connected to two side parts (3), a rear part (4) and a front part (5), an opening part (7) in the form of a skirt being provided at least on the front part (5), which can be removably fixed by fastening means (8) in a closed position on the front part (5) along at least one separation plane (9), and which can be brought, after release of the fastening means (8), into an open position allowing access to the interior of the protective cover (1), the cover part (2), the side parts (3), the rear part (4) and the front part (5) being made of a high-temperature resistant fiber fabric, manufactured from yarns woven together,having a continuous temperature resistance of at least 750 °C. (Fig. 5)

Description

Title of the invention: Protective cover State of the art

[0001] The invention relates to a protective cover intended for an energy storage unit.

[0002] Increasingly, households, small businesses, and public and industrial institutions are using battery-powered devices, such as machine tools, electric bicycles, and the like, whose accumulators—that is, energy reserves consisting of several energy storage cells—are either fixed within the tool or removable. Often, the removed devices or energy accumulators are placed in a cabinet or shelf structure for charging, where they are connected to a suitable power supply and can be charged, for example, overnight, or they are placed in this structure for storage. Similarly, motor vehicle batteries are sometimes stored, for example in workshops, for charging, at least for a short time, in superstructures of cabinets or shelves designed for charging or storage.These energy storage units can store energy ranging from a few watt-hours (Wh) to 1 kWh. Even if an individual energy storage unit doesn't have a very high energy content, especially in applications involving small devices, storing several such units can lead to a considerable total power output. This is because it's possible to use a larger number of energy storage units, up to the maximum capacity of the cabinet or shelf structure. The cabinet or shelf structure, incorporating the devices or integrated energy storage units, constitutes an energy storage system. Another example of an application for energy storage units is that of stationary energy storage units used to power electrical devices.Examples of energy storage systems include, but are not limited to, energy storage systems that store electricity or energy generated by an associated photovoltaic installation. The configuration of such an energy storage system varies, ranging from smaller devices with a storage capacity of only a few kWh, for example, 8-14 kWh, as is common in households, to larger systems suitable for public and industrial applications. Energy storage systems are most often modular, meaning they consist of several individual energy storage blocks, each comprising a plurality of individual energy storage cells. These individual energy storage blocks are generally assembled into a rectangular energy storage system. Energy storage blocks can be either mechanically connected to each other or arranged in a suitable cabinet or shelf structure. Examples of energy storage cells used for the various storage types described above include lithium-ion cells, as well as other monovalent storage systems such as sodium-ion systems, and multivalent systems such as zinc-ion and aluminum-ion technologies.

[0003] Each battery has a large number of energy storage cells in which a corresponding amount of energy can be stored. This presents the problem that, in the event of a technical fault, due to the presence of chemically bound oxygen or hydrogen in each energy storage cell, a fire, deflagration, or explosion may occur spontaneously under the effect of the heat thus produced or as a result of improper handling, in which case a single burning cell in the battery may also set fire to neighboring cells. The problem then arises that this burning battery cannot be extinguished by traditional extinguishing means such as a fire extinguisher.

[0004] In the event of a vehicle battery fire, in order to limit the spread of the fire and to gain time until a firefighter can arrive on the scene and combat the fire with appropriate means, it is known to place a special fire blanket on the vehicle. This blanket is resistant even to high temperatures and serves to cover the area or source of the fire. Such a fire blanket is described, for example, in document DE 20 2020 104 975 Ul. This fire blanket is made of a fiberglass fabric, in particular coated, for example, with silicone on both sides. The fiberglass fabric is made of high-temperature glass fibers and has a continuous temperature resistance of at least 600 °C or more.For such a fire blanket, a high-temperature resistant fiberglass fabric is used, woven from extremely temperature-resistant glass fibers. These fibers ensure that the fiberglass fabric, and therefore the fire blanket itself, has a continuous temperature resistance of at least 600°C. Continuous resistance means that the fiberglass fabric, and therefore the fire blanket, can be exposed to a constant temperature of at least 600°C for an extended period, for example, at least five minutes or more, without sustaining damage; in other words, the fiberglass fabric, and therefore the fire blanket, is able to maintain its full extinguishing capacity for that period.This allows the use of this type of fire blanket to extinguish vehicle fires, whether in fuel-powered vehicles, electric vehicles or hybrid-powered vehicles, knowing that, for such fires, on the one hand, the extinguishing process may take longer than for . other fires and, on the other hand, that higher temperatures are generated by the combustion of fuel or battery during combustion, to which the fire blanket is exposed for a longer period.

[0005] A fire blanket of this type has dimensions of several square meters, for example from 6 x 8 m to 8 x 10 m, in order to completely cover the vehicle. However, this fire blanket is not very maneuverable for other applications and therefore does not offer sufficient protection.

[0006] The invention relates to providing an effective fire protection solution for an energy storage system, including in particular a cabinet or shelf-type structure in which energy storage units are installed. Advantages of the invention

[0007] To solve this problem, the invention provides a protective cover for an energy storage unit, comprising a cover part, which is connected to two side parts, a rear part and a front part, an opening in the form of a skirt being provided at least on the front part, which can be removably fixed by fastening means in a closed position on the front part along at least one separation plane, and which can be brought, after release of the fastening means, into an open position allowing access to the inside of the protective cover, the cover part, the side parts, the rear part and the front part being made of a high-temperature resistant fiber fabric, manufactured from yarns woven together,having a continuous temperature resistance of at least 750 °C.

[0008] The shape of the protective cover according to the invention is adapted to the specific shape of the energy storage assembly, which is generally parallelepiped-shaped. This allows the protective cover, when slipped onto or placed over the energy storage assembly, to conform as closely as possible to its shape and enclose it. The parallelepiped shape is determined either by the cabinet or shelf structure into which the energy storage units are inserted, or by the overall shape of multiple individual parallelepiped energy storage units, for example, stacked one on top of the other. To this end, the protective cover has a cover portion, two side portions, a rear portion, and a front portion, which are connected into a common hood having a parallelepiped shape, meaning that the different parts are almost perpendicular to each other.At least on the front part, there is a skirt-shaped opening which can, if necessary, be moved from a closed position, to which it is fixedly connected to the front part, to an open position, to which it is detached from the part. The front panel is located along at least one dividing plane and can therefore be folded down, for example, to the side or upwards. This opening, or the opening formed when open, provides access to the energy storage unit, so that corresponding control elements and displays, etc., remain accessible even when the protective cover is in place. In the closed position, the opening is permanently attached to the front panel by suitable fasteners, resulting in a closed front panel. Another opening can, of course, be provided on other parts, for example, on one or both of the side panels, to allow access to them as well. If the energy storage unit also needs to be accessible from the rear, its rear panel can also have an opening.

[0009] The protective cover according to the invention, or its various parts, is made of a high-temperature resistant fiber fabric, which has a continuous temperature resistance of at least 750 °C, and preferably higher. This fiber fabric may be made of glass fibers, carbon fibers, ceramic fibers, basalt fibers, or silicate fibers. The fiber fabric is designed to withstand not only the temperature, but also the high pressure resulting from a deflagration or detonation inside the energy storage unit, as well as any component or fragment ejected following a cell explosion. In this regard, the fastening means by which the opening portion is securely connected to the front portion in the closed position are, of course, designed accordingly.The parts can be made of a single layer of fiber fabric, but they can also be made of two or more layers, one of which is formed by the fiber fabric.

[0010] The protective cover according to the invention thus provides the best possible protection against the spread of a potential fire in the battery, as well as effectively preventing damage to nearby objects from flying debris, etc. Due to its high temperature resistance and continuous durability, the protective cover according to the invention can extinguish a potential fire, even for extended periods. The optimal fit allows the protective cover to be easily placed or slipped onto the energy storage unit and completely enclosed, so that it is effectively fully covered.

[0011] As described, the opening part, or, if several are provided, each of them, can be moved from its closed position to an open position to open the protective cover. For this purpose, the opening part can preferably be reversibly detached from its connection, obtained by The mounting means are provided, with the front panel positioned along vertically extending dividing planes in the mounting position. In this configuration, the opening is skirt-shaped and preferably extends almost the entire height of the front panel, from practically the bottom edge to the top edge, allowing the front panel to be opened over as large an area as possible. The dividing planes extend vertically along the left and right edges of the front panel, enabling the opening to be opened or raised almost from bottom to top. Alternatively, a single U-shaped dividing plane, comprising two vertical sections and one horizontal section, may be used.The two vertical sections preferably extend again into the area of ​​the left and right edges of the front panel, and the lower horizontal section into the area of ​​the lower edge of the front panel. The same, of course, applies to other opening sections located on other parts.

[0012] As described above, the fastening means are designed to withstand higher pressures generated inside the cover. Fastening means may include zippers, hook and loop fasteners, snap fasteners, or twist closures, particularly those located on the front and guided by metal eyelets, notably those provided in the opening.

[0013] It is advisable for the opening portion to overlap the front face portion in the area of ​​the separation plane(s) on the inner face of the front face portion. This overlap of the inner face of the front face portion protects the fastening means from heat and direct contact with flames by an additional layer of fiber fabric. The overlap may only concern the area immediately adjacent to the separation plane(s), but may also extend somewhat further. The same, of course, applies to overlaps in other areas.

[0014] To simplify opening, it is conceivable that the opening section can be brought into the open position by a traction system such as a pleated blind or roller blind after the fastening means have been released. Therefore, once the user has released the fastening means, they can, by pulling on suitable traction means, such as cords, pull the released opening section almost upwards, so that the opening section gradually folds or rolls up and releases the opening. In the open position, the traction system can be appropriately locked so that the opening section remains open, the lock being, of course, releaseable for closing. If such a traction system is not provided, the opening section can then, for example, simply be raised or be rolled up, that is to say, rolled from bottom to top to form a roll which can then be fixed in the open position by appropriate fastening means, such as a retaining strap or a hook and loop fastener, or other.

[0015] A useful improvement provides for one or more ventilation devices, particularly on the cover. These ventilation devices allow for rapid gas and heat exchange; that is, hot gases or hot air can pass from the inside of the cover to the outside via the ventilation devices. Such a ventilation device may take the form of a simple opening, particularly in the cover. Alternatively, a temperature-resistant insert, for example a metal grid or a filter, may be inserted into such an opening or sewn to the edge with the fiber fabric, so that the inside of the protective cover is not directly accessible.

[0016] According to an improvement of the invention, the protective cover is provided to be open at its base. More specifically, the protective cover is open in its lower area and practically only reaches the ground via its sides, rear face, and front face, and rests upon it. This is particularly advantageous because it allows for the rapid evacuation of overpressure resulting from an explosion, as well as hot gases from an explosion or fire that may escape downwards through the open bottom of the protective cover, so that the temperature inside the cover does not rise excessively. This helps to counteract a "thermal runaway" of the energy accumulator.

[0017] The fiber fabric itself can, as described above, be made of glass fibers, carbon fibers, silicate fibers, ceramic fibers, or basalt fibers woven together or bonded by some type of weave. Blends of two or more different fibers are also possible for forming the fiber fabric. Although glass fibers, silicate fibers, and metal wires are mentioned above in the plural, it is conceivable that in each case it refers to a single continuous fiber or wire that runs through the fabric in a meandering pattern. In the different rows of fabric, one fiber or wire is present, which is why, when the fabric is viewed lengthwise or widthwise, several fibers or wires are expected.

[0018] The fiber fabric itself can be coated on one or both sides. The fiber fabric is thus coated, this flame-resistant coating serving primarily to seal the fiber fabric, that is, to make the parts of the cover generally gas-tight, so that a fire can be made practically airtight against an oxygen supply and, consequently, the fire can be deprived of oxygen.

[0019] As described previously, the fiber fabric can be made of glass fibers, but carbon fibers, ceramic fibers, or basalt fibers are also possible. In this case, the fabric coating is preferably a silicone coating that covers the glass, carbon, ceramic, or basalt fiber fabric, preferably on both sides, and seals the fabric pores, thus achieving a watertight seal. The silicone coating also exhibits the highest possible temperature resistance. Instead of a silicone resin coating, a polyurethane or vermiculite coating can also be applied.

[0020] Furthermore, the fiber fabric can also be made, as described, of silicate fibers. A silicate fiber has a higher SiO2 content than a glass fiber, with the SiO2 content in a silicate fiber being at least 96%. Such a silicate fiber exhibits significantly higher temperature resistance than a glass fiber. The coating applied to such a silicate fiber fabric is preferably a vermiculite coating, which is also preferably applied to both sides of the silicate fiber fabric. Alternatively, a silicone or polyurethane coating can also be applied.

[0021] It is possible not to apply the same coating to both sides, but, as further provided for in the invention, it is possible to apply different coatings to the two sides of the fabric. A fabric made of glass, carbon, ceramic, or basalt fibers can, for example, be coated on one side, for example the front side, with a silicone or polyurethane coating, and on the other side, for example the back side, with a vermiculite coating. A silicate fabric can, for example, be coated on one side, for example the front side, with a silicone or polyurethane coating, and on the other side, for example the back side, with a vermiculite coating. It is therefore possible to form quasi-hybrid coatings or hybrid parts.In particular, in the case of a vermiculite coating applied to one side of the fabric, it is possible to achieve gas tightness by means of a silicone or polyurethane coating applied to the other side.

[0022] The fiber fabric can have a weight per unit area of ​​between 300 and 1200 g / m², particularly between 550 and 1100 g / m². This means that the weight per unit area must be as high as possible, sometimes also called weight per square meter or basis weight, so that a fiberglass fabric that is as densely woven and stable as possible is used. The functionality of a protective cover is influenced, on the one hand, by the temperature resistance or continuous temperature resistance of the fibers or fabric used, but also by the thickness or the The fabric's strength, or the fineness of its weave, influences its stability and density. Therefore, the highest possible weight per unit area is preferable. The fiber thickness should be between 0.4 and 1.3 mm. All intermediate values ​​within this range are acceptable and are considered to be individual, disclosed values.

[0023] According to an advantageous improvement, metallic threads may be woven into the fiber fabric. In addition to the fabric fibers, metallic threads are therefore woven into the fiber fabric, preferably woven over the entire surface of the fiber fabric. These metallic threads, which may, for example, be a thin steel wire, serve to reinforce the heat-resistant fabric, so that the fabric made of glass fibers, carbon fibers, basalt fibers, ceramic fibers, or silicate fibers and metallic threads is more robust against mechanical stresses and less prone to tearing.Damage to the protective cover due to burst pressure in the event of an explosion or from parts that themselves explode is also reduced thanks to the reinforcing metal threads, because the mechanical properties of the fiber fabric are significantly improved due to the mechanical properties of the metal threads woven over a large area.

[0024] The metal wires are woven into the fiber fabric. The fiber fabric generally consists of warp and weft yarns, with the metal wires being woven into the fabric either with the warp or with the weft yarn. The metal wires therefore run through the fiber fabric together with the warp or weft yarns, so that the metal wires can be incorporated without difficulty over the entire surface of the fiber fabric.

[0025] With regard to the incorporation of the metallic wires into the fiber fabric, two variations are conceivable. According to the first variation, the metallic wires can be laid parallel to the warp or weft yarns. The metallic wires are thus carried practically parallel to the respective yarn and are inserted into the fiber fabric, the metallic wire not being bonded to either yarn. Alternatively, it is conceivable that the metallic wires are wound around the warp or weft yarns. The respective yarn is thus designed as a winding yarn around which the metallic wire is wound, so that during the weaving of the warp or weft yarn, the metallic wire is inevitably woven at the same time, since it surrounds the yarn.

[0026] A metal wire must have a diameter between 5 and 25 µm, in particular between 6 and 20 µm. Very thin metal wires are therefore incorporated, which is nevertheless quite sufficient to increase the resistance obtained. All intermediate values ​​within the specified diameter range are suitable and are considered as disclosed individual values. The fineness of a wire must be between 150 and 500 tex. The unit "tex" indicates the weight of the wire in grams per 1000 meters. All intermediate values ​​within the stated range are acceptable and are considered disclosed individual values.

[0027] The metal wire itself can be a steel wire, but the use of other metal wires, for example based on a metal alloy, is also conceivable.

[0028] Furthermore, the fiber fabric itself may have 18 to 22 warp yarns per centimeter, in particular 19 to 20 warp yarns per centimeter, and 10 to 15 weft yarns per centimeter, in particular 11 to 14 weft yarns per centimeter. If, as envisaged according to the invention, the metal wire is carried along with the warp yarn or the weft yarn, the metal wire is also present in a corresponding quantity. More precisely, when the metal wire is, for example, woven with the weft yarn, the density or number of yarns per centimeter of the metal wire corresponds to the number of weft yarns per centimeter. All intermediate values ​​within the indicated range are appropriate and are considered to be disclosed individual values. Brief description of the figures

[0029] Other advantages and details of the present invention will become apparent from the embodiments described below and from the drawings.

[0030] The Figures represent:

[0031] [Fig. 1] Schematic diagram of a protective cover according to the invention, front view in perspective,

[0032] [Fig.2] Rear perspective view of the protective cover of the [Fig.1],

[0033] [Fig.3] Schematic diagram of the protective cover according to the invention and of a Energy storage assembly before the protective cover is fitted,

[0034] [Fig.4] Assembly of the [Fig.3] after the protective cover is fitted,

[0035] [Fig.5] Assembly of [Fig.4] after release and opening of the opening part,

[0036] [Fig. 6] Schematic diagram of the connection between the opening part and the front part before, in the area of ​​the two separation planes,

[0037] [Fig.7] Top view of the cover portion illustrating ventilation devices, and

[0038] [Fig.8] Schematic diagram of a protective cover of another embodiment according to the invention. Description of the implementation methods

[0039] Figures 1 and 2 illustrate a protective cover 1 according to the invention. This cover has a parallelepiped shape and consists of a cover part 2, two side parts 3, a rear face part 4 and a front face part 5, which are connected to each other in said parallelepiped shape.

[0040] Each part consists of a fiber fabric or, in the case of a multilayer structure, comprises a fiber fabric made of fibers or yarns woven together, including warp yarns and weft yarns woven with them. The fiber fabric has a continuous temperature resistance of at least 750 °C. The fibers or yarns are, for example, glass fibers, carbon fibers, silicate fibers, ceramic fibers, or basalt fibers, or a mixture of different fibers. In addition, a metal wire finer than the warp and weft yarns, for example, stainless steel, may be inserted or woven in, this metal wire being, for example, guided parallel to the weft yarn or twisted with it. The number of warp yarns must be between 18 and 22 per centimeter, while the number of weft yarns must be between 10 and 15 per centimeter.The weight per unit area must be between 500 and 1200 g / m². Furthermore, the protective cover 1, or each part thereof, may be coated over the fiber fabric. This coating may be applied to one or both sides. This coating may be silicone, polyurethane, or vermiculite; if the coating is applied to both sides, different coatings may also be used. The coatings are therefore temperature-resistant and serve, in particular, to seal the fiber fabric, preventing air or oxygen from passing through it.

[0041] The different parts can be manufactured separately and then joined together appropriately, for example by sewing or gluing. Alternatively, it is also possible to manufacture several or all of the parts from a virtually single piece of fiber fabric and join them together, for example, only at the vertically extending longitudinal edges.

[0042] The protective cover 1 serves to cover or enclose an energy storage unit, also parallelepiped in shape, i.e., corresponding to the shape of the protective cover 1, and for this purpose, as will be described below, the protective cover 1, open at its base, is placed over the energy storage unit. It serves to protect the environment in the event of extreme heat release, a possible fire, a deflagration, or even an explosion of the energy storage unit and, for example, to prevent the spread of fire.In order to allow the evacuation of gases that form inside the protective cover in such a case and to achieve pressure equalization in the event of high pressure inside, several ventilation devices 6 are provided on the cover section 2, for example in the form of simple openings or perforations, which allow the escape of gas or hot air as well as pressure equalization. This is also possible via the protective cover 1 open towards the . low, given that in the mounting position, the protective cover 1 rests on the ground by its lower edge and is therefore not connected to the energy storage unit or to the ground in a fixed and gas-tight manner.

[0043] In the mounting position, the protective cover 1 completely encloses the parallelepiped-shaped energy storage unit, i.e., on the upper part as well as on all sides. In order to allow access to the interior, and thus to the energy storage unit, if necessary, an opening 7 in the form of a skirt is provided, at least in the front face 5, which is shown in [Fig. 1] in a closed position where it is fixed by removable fastening means 8, which may be zippers, hook and loop fasteners, snap fasteners, or twist closures provided in particular on the front face and guided by metal eyelets, notably provided in the opening 7.These fastening means 8 can be released, so that the skirt-shaped opening 7 can be opened along two separating planes 9 which extend vertically here. At the lower end, it is completely detached, and at the upper end, it remains connected to the front face part 5 or, where applicable, to the cover part 2, depending on the height to which the fastening means 8 or the separating planes 9 extend.

[0044] Figure 3 illustrates, on the one hand, the protective cover 1 already described above, and on the other hand, an energy storage unit 10 which, in the illustrated example, consists of several separate storage blocks 11, each of which comprises a plurality of individual energy storage cells, for example, lithium-ion cells. Such an energy storage unit 10 is therefore scalable, that is to say, it can be made in different sizes and in such a way as to have variable storage volumes. In each case, the storage unit 10 is parallelepiped in shape. The different storage blocks 11 can be directly connected to each other, for example by lateral connecting struts or otherwise, or inserted into a shelf (not shown here), or into a mounting cabinet or other container.Alternatively, the energy storage unit can consist of a cabinet or shelving system in which small energy storage units are arranged, for example, to power machine tools, or the machine tools themselves can be used for charging or storage. In any case, the energy storage unit 10, which also includes such a mounting shelf or cabinet, has a parallelepiped shape to which the shape of the protective cover 10 is adjusted. The length, width, and height of the protective cover 1 are, as far as possible, adapted to the dimensions of the energy storage unit 10 so that, on the one hand, the protective cover 10 can be easily put on, i.e., that there is . there must still be sufficient air or space between the protective cover 1 and the energy storage unit 10, but on the other hand, it must not be too bulky and must not protrude excessively on the sides.

[0045] The protective cover 1 is folded into a small format in the non-use position. By unfolding it, it can be given the shape illustrated in [Fig.3], into which it is then slipped from the top onto the energy storage assembly 10, as shown by arrow P.

[0046] Figure 4 illustrates the entire assembly of Figure 3 after the protective cover 1 has been fitted. It can be seen that the cover completely covers the upper surface and all four sides of the energy storage unit 10, which is shown only in dashed lines. The height of the protective cover 1 is calculated so that its lower edge rests on the ground, thus providing adequate support at this point. However, the protective cover 1 is not closed at its base, as it is designed to be slipped on. This opening at the base is also advantageous because a corresponding equalization of gases and pressures can also occur via the lower part. The ventilation devices 6 are, as shown, located on the cover portion 2, i.e., above the energy storage unit, so that hot air and pressure can also escape at this point.

[0047] As described previously, the opening portion 7, which is of course made of the same material as the other parts, can be opened if necessary, i.e. an opening can be formed in the front face portion to allow access to the interior, i.e. to the energy storage assembly 10. For this purpose, it is sufficient to release the fastening means 8, whatever their type, so that the skirt-shaped opening portion 7 is freed from its fixed anchorage relative to the front face portion 5. If the fastening means 8 are, for example, two zippers, these are simply pulled manually from bottom to top, so that the two separating planes 9 open and the opening portion 7 can be rolled up from bottom to top. This situation is illustrated in [Fig.[5], where the opening portion 7 has been rolled up and is secured by means of suitable retaining means 12, for example hook and loop fasteners, in the rolled or raised position in the area of ​​the cover portion 2. As can be seen, the various storage blocks 11 are accessible from the front, on which there are usually control elements, displays, or other features. If the protective cover 1 needs to be closed, it is sufficient to release the retaining means 12 so that the opening portion 7 falls downwards. It is then simply a matter of pulling the zippers downwards again, i.e., closing the fastening means 8, so that the opening portion 7 is once again firmly anchored in the front wall portion 5. Opening sections can also be provided in other sections, which are configured or arranged in the same way.

[0048] Figure 6 illustrates a partial enlarged view of the front face portion 5 with the opening portion 7 in the closed position. The fastening means 8 shown here are, by way of example, made in the manner of a zipper. In the closed position illustrated in Figure 6, with two lateral overlapping portions 13, the opening portion 7 overlaps, on the inner face, the fastening means 8, and, again partially, the front face portion 5. In the area of ​​the fastening means 8, an additional protective layer is thus formed by means of the overlapping portions 13, so that the fastening means 8 are protected from heat or fire from the inside.

[0049] Fig. 7 illustrates a top view of the protective cover 1, i.e. of the cover part 2. Three ventilation devices 6 of different design are shown by way of example, the ventilation device 6 on the left being made in the form of a simple perforation 14, i.e. a simple hole made in the cover part 2. This perforation therefore extends through the fiber fabric and, where applicable, through the other layers if it is a multilayer structure. To prevent tearing of the edge of the perforation made in the fibre fabric or layered structure, the perforation 14 can be delimited around its perimeter, for example by one or two metal rings fixed to the fibre fabric, these metal rings being connected appropriately to the fibre fabric or layered structure, for example by sewing, gluing or by means of fixing elements such as rivets or the like.

[0050] The central ventilation device 6 is, for example, equipped with a ventilation grille 15 which is inserted into the perforation and partially closes it, so that no object can enter through this means, but that gas and heat balancing is still possible. The ventilation grille 15 is, for example, made of metal and is appropriately connected to the fiber fabric, for example by sewing, gluing, or fastening with rivets, etc.

[0051] 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, carbon fiber, or glass fiber, etc. The filter 16 is, for example, housed between two perforated metal half-shells, which are themselves securely bonded to the fiber fabric, so that gas and heat exchange is also possible through this means, in conjunction with a corresponding filtering function for any fine or other particles. The various ventilation devices 6 in [Fig. 7] are shown only by way of example. Of course, ventilation devices 6 of the same type are provided on a protective cover 1, the [Fig.7] illustrating only 3 different variants for representation reasons.

[0052] Figure 8 illustrates another configuration of a protective cover 1 according to the invention, again consisting of an upper part 2 comprising the ventilation devices 6, two side parts 3, a rear part 4 not shown in further detail, and a front part 5, on which a movable, skirt-shaped opening 7 is again provided. This is again fixedly, but removably, connected to the front part 5 by means of a fastening means 8, said fastening means being, for example, a zipper, a hook-and-loop fastener, or the like, as described previously. Unlike the embodiment shown in the preceding figures, only one U-shaped separation plane 9 is provided here; that is, the fastening means 8 extends in a U-shape with two vertical parts and one horizontal part.If the fastening means 8, i.e. for example the zipper, is open, it is pulled downwards from the top right to the left side and then upwards again, so that the opening part 7 is released and can be rolled upwards in a manner similar to that described in relation to [Fig. 5]. It also closes in the opposite direction.

[0053] Although the preceding figures describe the possibility of manually rolling up the opening section after detaching it, it is possible to provide a traction system by means of which the detached opening section 7 is either folded and pulled upwards like a pleated blind, or rolled up like a roller blind, as illustrated in [Fig. 5]. For this purpose, corresponding traction means, such as straps or the like, are provided, which the user pulls after releasing the fastening means 8, whereupon the released opening section 7 is pulled upwards. In the open position, the traction means is / are secured accordingly, and to close the protective cover 1, they must be released again and the opening section 7 allowed to descend.

Claims

Demands

1. Protective cover for an energy storage assembly, comprising a cover portion (2), which is connected to two side portions (3), a rear portion (4) and a front portion (5), an opening portion (7) in the form of a skirt being provided at least on the front portion (5), which can be removably fixed by fastening means (8) in a closed position on the front portion (5) along at least one separation plane (9), and which can be brought, after release of the fastening means (8), into an open position allowing access to the interior of the protective cover (1), the cover portion (2), the side portions (3), the rear portion (4) and the front portion (5) being made of a high-temperature resistant fiber fabric, manufactured from yarns woven together,having a continuous temperature resistance of at least 750 °C.

2. Protective cover according to claim 1, characterized in that the opening part (7) can be reversibly detached from its connection, obtained by the fastening means (8), with the front face part (5) along separation planes (9) extending vertically in the mounting position.

3. Protective cover according to claim 1 or 2, characterized in that the fastening means (8) are zippers, hook and loop fasteners, snap fasteners, or rotating fasteners guided by metal eyelets in particular provided in the opening part and in particular provided in the front part.

4. Protective cover according to any one of the preceding claims, characterized in that the opening part (7) overlaps the front part (5) in the area of ​​the separation plane(s) (9) on the inner face of the front part (5).

5. Protective cover according to any one of the preceding claims, characterized in that the opening part (7) can be brought into the open position by means of a traction system in the manner of a pleated blind or a roller blind after releasing the fixing means (8).

6. Protective cover according to any one of the preceding claims, characterized in that it provides, in particular on the cover part (2), one or more ventilation devices (6).

7. Protective cover according to claim 6, characterized in that a ventilation device is made in the form of an opening (14), or in that an insert (15, 16) is disposed in the opening.

8. Protective cover according to any one of the preceding claims, characterized in that it is open at its base.

9. Protective cover according to any one of the preceding claims, characterized in that the fiber fabric is made of glass fibers, carbon fibers, silicate fibers, ceramic fibers or basalt fibers or mixtures thereof.

10. Protective cover according to any one of the preceding claims, characterized in that the fibre fabric is provided with a coating on one side or on both sides.

11. Protective cover according to claim 10, characterized in that the coating is a silicone coating, a polyurethane coating or a vermiculite coating.

12. Protective cover according to claim 10 or 11, characterized in that the fibre fabric is provided with different coatings on both sides.

13. Protective cover according to any one of the preceding claims, characterized in that the fibre fabric has a weight per unit area between 300 and 1200 g / m2, in particular between 550 and 1100 g / m2.

14. Protective cover according to any one of the preceding claims, characterized in that the fibre fabric has a thickness of 0.4 to 1.3 mm.

15. Protective cover according to any one of the preceding claims, characterized in that metal wires, in particular steel wires, are woven into the fiber fabric.

16. Protective cover according to claim 15, characterized in that the fibre fabric is made up of warp yarns and weft yarns, the metal yarns being woven into the fabric with the warp or weft yarn.

17. Protective cover according to claim 16, characterized in that the metal wires are parallel to the warp or weft wires,

18. or in that the metal wires are wound around the warp or weft wires. Protective cover according to any one of claims 15 to 17, characterized in that the diameter of the metal wires is between 5 and 25 pm, in particular between 6 and 20 pm, and / or the fineness of the metal wires is between 150 and 500 tex.

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