USE OF AN ABSORBENT MATERIAL FOR THE ABSORPTION AND / OR DISTRIBUTION OF LIQUIDS IN AN ACTIVELY AND / OR PASSIVELY COOLED CURRENT-CARRYING SYSTEM

Abstract

The invention relates to a method for loading a processing device with a cord profile to be supplied to the processing device, wherein the processing device processes the cord to form edge protection seals or strips on the vehicle body by cutting portions of the cord and attaching them to the vehicle body. The cord profile is supplied longitudinally from a delivery unit used to transport the cord profile to the processing location as it unwinds from a reel contained within the delivery unit. According to the invention, the cord profile is unwound either as a right-hand cord profile, applied to the vehicle body on the right side, starting with one of the two cord ends, or as a left-hand cord profile, applied to the vehicle body on the left side, starting with the other cord end.The invention also relates to a delivery unit and a winding support for carrying out the method.

Description

USE OF AN ABSORBENT MATERIAL TO RECEIVE AND / OR DISTRIBUTE LIQUIDS IN AN ACTIVE AND / OR PASSIVE COOLING CURRENT TRANSPORT SYSTEM FIELD OF INVENTION The invention relates to the use of an absorbent material for receiving and / or distributing liquids in an active and / or passive cooling current system, in particular an active and / or passive cooling electricity storage system, as well as the current transport system itself. BACKGROUND OF THE INVENTION Power transmission systems, particularly battery systems, are becoming increasingly important because they are essential for powering electric and hybrid vehicles. To ensure optimal system performance, the battery cell temperature must be maintained within a specific range. To prevent the temperature from exceeding or falling below the operating temperature, active or passive temperature control systems are used. Specifically, the use of a liquid temperature control medium with high thermal capacity has proven effective. This liquid is a good heat conductor and is circulated along the battery cells in a heat exchanger. Furthermore, these systems are not usually hermetically sealed from the environment. That is, they allow for gas exchange with the surroundings. To prevent the entry of contaminants, the incoming air is filtered. For example, microporous films or non-woven fabrics are used for this purpose. All these approaches allow the filtration of particles, but not of gases, and especially not of water vapor. Therefore, water vapor can pass through the foils to the electronic envelope. There, however, the internal space of the envelope cools down, and the water can condense at a cold spot on the envelope (if its dew point is exceeded). Since the active parts, in particular, cool down, condensate formation occurs where it is most critical. Furthermore, if the temperature on the cover itself is consistently lower, the condensate that forms can only be removed with difficulty. Pumps, controlled valves, or baking could be considered solutions. These approaches are complex and prone to errors. Baking is also prohibited in many applications (e.g., battery systems). Drying media are an effective means of absorbing water. They are placed inside or in front of the cover and bind the water irreversibly. The drawback, however, is that these agents absorb not only liquid water but also water vapor. If the media is placed inside a cover, it also dehumidifies the air space within it. As a result, water vapor is drawn into the cover, which under normal circumstances would not have entered at all. Therefore, such drying cartridges function not only as moisture absorbers but also as dehumidifiers. Furthermore, one problem is that, for example, in an accident involving a vehicle equipped in this way, leaks could occur, and therefore the temperature control medium could escape from the heat sink. This temperature control medium could come into direct contact with the battery cells and, for example, cause a short circuit due to its conductivity. A common drying agent is P₂O₅. Although it has an extremely high water absorption capacity, it forms liquid phosphoric acid upon absorbing water. This can cause corrosion and, due to its electrical conductivity, poses a risk to electrical applications. Furthermore, water absorption is irreversible. Other typical drying agents such as CaCh react similarly. If the drying media is loose, this leads to dust formation. They are also electrically conductive when wet and can therefore cause short circuits. Other well-known liquid substances, particularly water absorbents, include superabsorbents. The advantage of superabsorbents is that they have a very high water absorption capacity, react chemically in a neutral manner (even with organic solvents), and can be reversibly charged. With polar liquid media, superabsorbents cause significant swelling and possibly gel formation. In particular, this swelling can lead to the liquid's transport channel becoming blocked (a phenomenon known as gel-blocking), preventing subsequent absorption. Therefore, swelling in electronic devices is detrimental from two other perspectives: First, the swollen material can generate mechanical pressures that, for example, can separate electrical contacts. Second, uncontrolled swelling can cause electrical short circuits if the swollen material comes into contact with live parts. One difficulty is the application of the superabsorbent. One possibility is to use superabsorbent fibers, as described in EP2731164 (A1), for example. A battery system is shown comprising battery cells, at least one absorption element, and a temperature control system with a liquid temperature control medium for cooling and / or heating the battery cells in a battery casing. The absorption element for receiving the liquid temperature control medium is arranged between the battery cells and the battery casing, wherein the absorption element is a nonwoven fabric, wherein the fabric has an average mass per unit area of ​​250 to 700 g / m² and comprises fibers of at least two different fiber types, wherein at least one fiber type is a support fiber and at least one additional fiber type is an absorption fiber. One disadvantage of using absorbent fibers is that they generally have a lower absorption capacity than comparable absorbent particles. Furthermore, they typically exhibit lower thermal stability in both their dry and swollen states. Additionally, as explained earlier, the use of absorbent fibers can lead to a gel-locking effect. Similar to document DE 4134370 C1, superabsorbent particles are used, which are fixed onto a textile fabric. A disadvantage is that the resulting finished absorbent pads are relatively complex to manufacture. For example, the powdered superabsorbent particles must first be fixed onto a veil, and then the resulting product is coated with a top layer and a carrier layer to prevent dust formation. Typical production problems are associated with the coating, for example: • Limitations in the quantity of the coating or active component (too much powder -> material too thick -> too rigid) • Adhesion problems • Limitations regarding the use of different components from synergistic sources such as SAP + pulp + IVIA / a / ZUZ I / UUOUZ4 guar, • too much complexity in the manufacturing process. • High manufacturing costs • Influence of the additives (coating aids) required for the production technology on the absorption behavior. BRIEF DESCRIPTION OF THE INVENTION One objective of the invention is to at least partially eliminate the disadvantages mentioned above. In particular, a material must be provided that has good water absorption and retention. The material should also be able to reversibly bind water and, if necessary, water vapor. Furthermore, it must have controlled swelling, and a blocking effect must be avoided. Finally, it should be usable with minimal dust. This objective will be achieved by using an absorption material comprising a cover and superabsorbent particles arranged therein to receive and / or distribute fluids in a passive and / or active cooling stream system, in particular in an active and / or passive cooling electricity storage system, wherein the cover is designed of at least two layers arranged one on top of the other, wherein the layers are connected to each other in some areas by at least one seam, so that segmentation of the cover results in the shape of pockets that are delimited from each other and at least some of the pockets contain the superabsorbent particles. According to the invention, the absorbent material has been found to be exceptionally suitable for the absorption and distribution of liquids in active and / or passive cooling systems because the arrangement of the superabsorbent particles in a segmented cover prevents or at least reduces a gel-blocking effect during use. This can be attributed to the fact that the segmentation divides the amount of superabsorbent, reducing the maximum possible accumulation of superabsorbent particles in one place and thus minimizing clumping that can occur in the event of a gel blockage. Furthermore, at least one seam between the pockets, acting as a transport channel, allows the liquid to be carried further into the absorbent material as it is absorbed.In this way, the absorption capacity of the superabsorbent particles can be optimally utilized, which can also counteract gel blockage. Furthermore, segmenting the superabsorbent particles can reduce the risk of dust formation, since only a portion of the particles is released if the coating on the damaged segment is breached. Finally, segmentation allows for the use of superabsorbents in particulate form. These have the advantage over superabsorbent fibers of offering greater absorption capacity with comparable thermal stability in both the dry and swollen states. In a preferred embodiment, at least one seam is configured as a welded seam, in particular as a thermally and / or ultrasonically welded seam, an adhesive seam, and / or a stitched seam. The advantage of welded seams is that they can be made particularly quickly and easily. According to the invention, the cover is segmented by forming at least one pocket, each delimited by a seam. Furthermore, at least one seam can be used to connect the layers arranged flat on top of each other. Preferably, the areas of the cover without seams are not, and / or are at least less, compressed than the seam areas. The term “current system,” according to the invention, used in the conventional sense, refers to a system that operates by means of an electric current. According to the invention, current systems are selected components of an electric current system, a current-carrying power converter, a transformer, a power electronics system, an electronic control system, particularly a processor-controlled system, a charging station, an inverter, a rectifier, an electrolyzer, and / or combinations thereof. The term “electric current system,” in accordance with the invention, shall be used in its usual sense. In particular, an electricity storage system is understood to be a system for storing energy that is currently available but not required for subsequent use. This storage is usually accompanied by a change in the form of energy, for example, from electricity into chemical energy. If necessary, the energy will be converted back into the desired form of electricity. Preferably, the electric current systems are battery, capacitor, and / or accumulator systems, in accordance with the invention. Battery systems are particularly preferred. Battery systems are series- or parallel-switched modules containing primary or secondary cells also switched in series or parallel. Accumulators are series- or parallel-switched modules containing secondary cells also switched in series or parallel. Capacitors are passive electrical components with the ability to statically store electrical charge in a direct current circuit and the associated energy in an electric field. Liquid absorption refers to the fact that the absorbent material absorbs fluids. Therefore, the electrical system can be protected from fluid damage. Fluid distribution refers to the distribution of fluids across the surface of the absorbent material. Absorption and distribution preferably occur parallel to each other. The liquids to be absorbed by the system according to the invention are preferably refrigerants and / or water, as these are commonly used or produced in active or passive cooling systems. Preferably, the refrigerants are in particular glycol and / or alcohol / water mixtures, especially glycol / water mixtures. In one embodiment of the invention, the liquid to be absorbed by the system according to the invention is not a battery electrolyte. At least one seam can be either continuous or discontinuous. Discontinuous seams consist of immediate seam areas, which are the areas of the seam that join the two layers, and indirect seam areas, which are the areas of the seam located between the immediate seam areas and not part of the pockets. In the case of welded seams, the immediate seam areas are the welded areas; in the case of stitched seams, the areas covered by the thread; and in the case of glued seams, the areas joined by adhesive. Discontinuous seams have the advantage of having a smaller proportion of seam surface area and, therefore, greater capillarity and better flow of the liquid to be absorbed. Continuous seams have the advantage of reducing the risk of superabsorbent particles escaping. At least one seam can also be designed as a straight line or a curve. IVIA / a / ZUZ I / UUOUZ4 combinations thereof. In the case of a discontinuous configuration, at least one seam may be designed in the form of neatly arranged lines and / or dots and / or stripes. As explained above, the parts of the seam that serve to join the two layers are the immediate seam surfaces. The width of at least one seam is preferably from 0.5 to 15 mm, more preferably from 0.5 to 10 mm, and particularly preferably from 1 to 6 mm. More preferably, the seam area, i.e., the sum of the direct and indirect seam areas within the area of ​​the absorbent material, is at least from 0.4 to 50% of the area, more preferably from 2 to 40% of the area, and particularly preferably from 4 to 35% of the area. If the seam area is less than 0.4% of the area, the seam strength is generally too low. If the seam area is greater than 50%, the area available for swelling is too small. In one particular configuration, at least one seam is configured as a welded seam that is perforated, preferably in its center. The advantage here is that the absorbent material can be adapted to the installation situation in a particularly simple way. For example, gaps can be selectively created by separating partial areas along the perforated welded seam. The shape of the weld seam may vary. In a preferred embodiment, the transition between the weld seam and the unwelded areas of the layers is smooth. In a preferred embodiment, the thickness of the welded areas of the weld seam increases in the direction of at least one pocket adjacent to the weld seam, preferably in the direction of both adjacent pockets. Correspondingly, the density of the welded areas of the weld seam decreases in the direction of at least one pocket, preferably in the direction of both adjacent pockets. The transition between the weld seam and the pocket is preferably continuous. The area of ​​greatest compression is preferably in the middle of the weld seam. This may result in a rounded, particularly semicircular, geometry of the weld bead. The advantage here is increased weld bead strength. The geometry of the pocket can vary. Pockets preferably have one or more of the following geometries, regardless of the other: rectangular, triangular, hexagonal, ladder-shaped, round, oval, and / or curved. Most preferably, pockets have at least a partially rectangular pocket geometry. This geometry is preferred because it is technically particularly easy to represent. In a further preferred embodiment, the number of pockets per square meter of absorbent material is in the range of at least two pockets per square meter, for example, from 4 to 400 pockets per square meter, more preferably from 8 to 300 pockets per square meter and in particular from 16 to 200 pockets per square meter. The amount of superabsorbent particles is also preferably at least 20 g / m2, for example, from 20 to 1000 g / m2, preferably from 20 to 800 g / m2 and especially preferably from 20 to 600 g / m2, based on the area of ​​the absorbent material. Furthermore, the amount of superabsorbent particles per pocket is preferably at least 0.5g per pocket, for example, from 0.5g to 500g per pocket, preferably from 20 to 400g per pocket and in particular from 20 to 200g per pocket. Superabsorbents are characterized by their excellent bonding with liquid; that is, they have good retention and can absorb it. According to the invention, a superabsorbent is understood to be IVIA / a / ¿U¿ I / UUOUZ4 a polymer that is able to absorb or receive a multiple of its own weight - up to 500 times - in liquids, preferably water, so that it increases in volume. In their swollen state, superabsorbents form hydrogels. Suitable superabsorbent particles, in particular, have cross-linked polymers, which are polar and composed of them. Polyacrylamide, polyvinylpyrrolidone, amylopectin, gelatin, and / or cellulose are particularly preferred. Copolymers of acrylic acid (propenoic acid, H₂C=CH-COOH) and / or sodium acrylate (sodium salt of acrylic acid, H₂C=CH-COONa) on one hand and acrylamide on the other are especially preferred. The ratio of the two monomers to each other can vary. A core crosslinker (CXL) is typically added to the monomers mentioned above. This crosslinks the long-chain polymer molecules formed together via chemical bonds. These bonds make the polymer insoluble in water. Additionally, a surface crosslinker (SXL) can be used. This chemical is applied to the surface of the particles, which, when heated, creates a second network only on the outer layer of the granule. This layer supports the swollen gel, keeping it together even under external stress (movement, pressure). In a preferred embodiment, in addition to the superabsorbent particles, at least one pocket contains a filler material, for example, absorbent materials such as cellulose pulp, fibers, guar gum, silica gel, and / or foam. The filler material is preferably in a weight proportion (filler material to the total amount of filler material plus superabsorbent particles) of at least 5% by weight, for example, from 5 to 90% by weight, more preferably from 5 to 75% by weight, and particularly from 5 to 50% by weight. In another preferred modality, at least one pocket contains fire-retardant substances in addition to superabsorbent particles, for example, substances that release fire-retardant gases and / or fire gas diluents. In another preferred embodiment, the absorbent material has a sound absorption coefficient ct, measured in accordance with DIN EN ISO 10534-1: 2001 on an impedance tube, of at least 0.1 to 1000 Hz, for example, 0.1 to 1, preferably 0.2 to 1, even more preferably 0.3 to 1. The degree of sound absorption can be established in various ways known to those skilled in the art. A high degree of absorption can be achieved by at least one additional layer, preferably placed on top of layers arranged flat one on top of the other. This additional layer is preferably made of melt-blown nonwoven fabric. Thus, in a preferred embodiment, the absorbent material according to the invention has at least one additional layer, which is preferably a melt-blown nonwoven fabric. The additional layer is most preferably arranged on at least an outer portion of the cover. It is also conceivable that the additional layer is arranged inside the pockets. In another preferred embodiment, at least one pocket contains acoustically active fillers, such as fiber pulp. In a further preferred embodiment, at least one layer of the cover has a flat textile structure, for example, a nonwoven fabric, a woven fabric, a knitted fabric, and / or an open-pore foam. The advantage of these materials is their good water permeability along with high structural integrity even when wet. The preferred nonwoven fabrics are spunbond nonwovens, wet-laid nonwovens, and / or dry-laid nonwovens. The basis weight is preferably from 10 g / m² to 500 g / m². In another preferred embodiment, the surface energy of the tissue, measured according to DIN 55660-2: 2011-12, is greater than 30 mN / m, preferably greater than 35 mN / m, and particularly preferably greater than 40 mN / m. The advantage here is that polar media such as water or water / glycol mixtures can be distributed particularly well. In a further preferred embodiment, the air permeability of the textile fabric is greater than 10 dm³ / (m²s), more preferably from 20 to 3000 dm³ / (m²s), and even more preferably from 30 to 2000 dm³ / (m²s), particularly from 30 to 1000 dm³ / (m²s). Air permeability is measured according to DIN EN ISO 9237:1995 at a differential pressure of 20.394 kgf / m² (200 Pa). Air permeability measurements are performed on samples of the textile fabric with a thickness of 0.05 to 10 mm before contact with the liquid, preferably from 0.1 to 1 mm, and especially with a sample area of ​​20 cm² through which air flows, at an air pressure differential of 20.394 kgf / m² (200 Pa). In another preferred embodiment, the air permeability of the absorbent material is greater than 10 dm³ / (m²s), preferably in the range of 20 to 3000 dm³ / (m²s), even more preferably from 30 to 2000 dm³ / (m²s), and particularly preferably in the range of 30 to 1000 dm³ / (m²s). Air permeability is measured according to DIN EN ISO 9237:1995 at a differential pressure of 20.394 kgf / m² (200 Pa). Air permeability measurements are carried out before contact with the liquid using samples of the textile fabric with a thickness of 0.1 to 15 mm, preferably from 0.25 to 5 mm, and especially with a sample area of ​​20 cm² through which air flows, at an air pressure differential of 20.394 kgf / m² (200 Pa). In a preferred embodiment of the invention, the fabric has an average pore size, measured according to ASTM E 1294-89, of more than 1 pm, for example, from 1 pm to 1000 pm, particularly from 10 to 800 pm. In a further preferred embodiment of the invention, the fabric has microfibers, preferably with a count of less than 1 dtex, for example, from 0.01 to 1 dtex, and even more preferably from 0.01 to 0.9 dtex. The advantage here is that the microfibers allow for particularly high capillarity and, as a result, particularly good liquid distribution. Moreover, due to their fineness, the microfibers allow for a particularly small pore size and, therefore, particularly low permeability to dust released by the superabsorbent particles. In another preferred embodiment of the invention, the absorbent material has a liquid (deionized water) absorption capacity of at least 2 l / m2, for example, from 2 l / m2 to 300 l / m2, more preferably from 3 l / m2 to 300 l / m2, more preferably from 5 l / m2 to 300 l / m2, even more preferably from 10 l / m2 to 300 l / m2, and especially from 20 l / m2 to 300 l / m2. The textile fabric preferably contains thermoplastic polymers, particularly those with a melting point below 270°C. Polyesters, copolyesters, polyamides, copolyamides, oliolefins, and / or blends thereof are particularly preferred. The advantage here is that they can be used for heat welding. However, the use of non-thermoplastic polymers is also conceivable. Such flat textile structures can be bonded together, if required. In a further preferred embodiment, the absorbent material is compressible. As a result, the absorbent material, comprising a cover and superabsorbent particles arranged thereon for the absorption and distribution of liquids in a flow transport system, can be formed by at least two layers arranged in two dimensions one on top of the other, the layers being partially connected to each other such that segmentation of the cover results in the form of pockets delimited from each other by seams, and at least some of the pockets containing the superabsorbent particles. The preferred current carrier systems are current carrier systems selected from an electricity storage system, a current carrier power converter, a transformer, a power electronics system, an electronic control system, in particular a processor-controlled system, a charging station, an inverter, a rectifier, an electrolyzer and / or combinations thereof. In a preferred embodiment, the current-carrying system is a battery system that includes a battery casing. The battery casing preferably contains battery cells. The battery cells are preferably connected to a cooling system in a thermally conductive manner. A pressure equalization element is preferably provided in the wall of the battery casing to equalize the pressure between the inside and outside of the battery casing. The absorbent pad is preferably arranged below the cooling system. In this way, the escaping coolant or condensate can be absorbed particularly efficiently. Therefore, the absorbent pad is preferably located in the lower part of the current-carrying system, i.e., between the cooling system and the bottom of the battery casing.Additionally or alternatively, the absorbent pad can be placed in the lateral area of ​​the current transport system, i.e., between the cooling system and the side walls of the battery casing. BRIEF DESCRIPTION OF THE FIGURES Figure 1: Schematic representation of an absorbent material 1 according to the invention in cross section Figure 2: Schematic representation of an absorbent material according to the invention in a plan view Figure 3: Schematic representation of an electricity storage system 11 according to the invention Figure 4: Schematic representation of an electricity storage system 11 not in accordance with the invention Figure 5: Schematic representation of an electricity storage system 11 according to the invention Figure 6: Schematic representation of a measuring device 15 for determining absorption kinetics Figure 7: Schematic representation of different sewing modalities 5 Figure 8: Schematic representation of the cross-section of a seam 5 between two pockets 4 Figure 9: Schematic representation of various pocket geometries Figure 10: Results of the measurement of the absorption kinetics of various absorption pads according to the invention DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a cross-section of an absorbent material 1 according to the invention, comprising a cover 2 and superabsorbent particles 3 arranged therein. The cover 2 comprises two layers arranged one on top of the other in the form of flat textile structures, the layers being joined together in some areas such that the casing is segmented into pockets 4 separated from each other by welded seams 5. At least some of the pockets contain the superabsorbent particles 3. Figure 2 shows an absorbent material 1 according to the invention in a plan view, divided into twelve pockets 4 and weld seams 5. Figure 3 shows an energy storage system 11 according to the invention, in the form of a battery comprising a battery casing 6. The battery casing 6 contains battery cells 7. The battery cells 7 are connected to a cooling system 8 in a thermally conductive manner. A pressure compensation element 9 is provided in the casing wall to compensate for the pressure between the inside and outside of the battery casing 6. Absorbent material 1 is disposed below the cooling system 8, as it allows the emerging coolant 10 or condensate 10 to be absorbed. The absorbent material 1 is arranged on the surface 12 of the base of the electricity storage system 11, i.e., between the cooling system 8 and the base of the battery casing 6. The absorbent material 1 comprises a cover 2 and superabsorbent particles 3. The cover 2 further comprises a flat textile structure and is divided into pockets 4. The absorbent material 1 is shown here in its uninflated state. Figure 4 shows an electricity storage system 11 not in accordance with the invention, comprising a battery housing 6. The battery housing 6 contains battery cells 7. The battery cells 7 are connected to a cooling system 8 in a thermally conductive manner. A pressure compensation element 9 is provided in the housing wall to compensate for the pressure between the inside and outside of the battery housing 6. Absorbent material 1 is arranged below the cooling system 8, as this allows for the absorption of the exiting coolant 10 or the exiting condensate 10. Absorbent material 1 is arranged on the surface of the base 12 of the electricity storage system 11, i.e., between the cooling system 8 and the base of the battery housing 6. Absorbent material 1 comprises a cover 2 and superabsorbent particles 3.Cover 2 further comprises a flat textile structure and is not divided into pockets. It is also shown how the escaping coolant 10 or the separating condensate 10 penetrates laterally into the absorbent material, and how further penetration is prevented by swelling of the absorbent material. Figure 5 shows an electricity storage system 11 according to the invention, which includes a battery housing 6. The battery housing 6 contains battery cells 7. A pressure equalization element 9 is provided in the housing wall to equalize the pressure between the inside and outside of the battery housing 6. Absorbent material 1 is disposed below the cooling system 8, as it allows the absorption of the emerging coolant 10 or condensate 10. Absorbent material 1 is arranged on the floor of the base 12 of the electricity storage system 11, i.e., between the cooling system 8 and the base of the battery housing 6. Absorbent material 1 comprises a cover 2 and superabsorbent particles 3. The cover 2 further comprises a flat textile structure and is divided into pockets 4.It is also shown how the escaping coolant 10 or the separating condensate 10 penetrates the absorbent material laterally and from the front through the seams 5 between the pockets 4. The absorbent material is shown swollen here. Figure 6 shows the measuring apparatus 15 for determining absorption kinetics. A glass bottle 16 is filled with coolant 17 and sealed against air by a rubber hose 18 (10 x 2 mm, 50 cm long). The rubber hose 18 can be closed with a clamp. The glass bottle 16 is fixed upside down on a stand 19, which is placed on a scale 20 to record the weight loss during the kinetic measurement. The opening of the rubber hose 18 is at the bottom of an instrument tray 21 (MF resin) with an inner surface of 315 x 210 x 50 mm (L x W x H), such that the hose opening is parallel to the bottom. The hose is secured to the edge of the instrument housing 21 with a non-deformable hose clamp 22. The distance from the bottom of the container can be varied. Figure 7 shows various variations of seam 5. The black area represents the immediate seam area. Seam a represents a continuous seam consisting entirely of a direct seam surface. Bag seams are discontinuous in several variations. In seam b, the black rectangles schematically represent the immediate seam areas, and the area between the black rectangles represents the indirect seam area. In seam cyd, the edges of the rectangles schematically represent the immediate seam areas, and the area between and within the rectangles represents the indirect seam area. In seams e, f, gyh, the black areas schematically represent the immediate seam areas, and the areas between them represent the indirect seam area. Seam h is designed as a center-perforated weld seam. Figure 8 shows the cross-section of a seam 5 between two pockets 4. The seam 5 is shaped like a weld seam. The pockets 4 are located to the left and right of the weld seam. The thickness of the weld seam increases in the direction of the pockets. The density of the weld seam decreases accordingly in the direction of the pockets. This transition is continuous. The area of ​​greatest compression is at the center of the weld 5. Figure 9 shows several cavity geometries (rectangular, triangular, hexagonal, scale-shaped, curved). Figure 10 shows the absorption kinetics of different absorption pads with varying numbers of chambers. It turns out that the absorption pads according to the invention with four or eight chambers have a higher absorption rate than a system with a single chamber. This is advantageous because the resulting coolant can be absorbed more quickly. The invention is explained in more detail below by means of several examples: Example 1: Production of various absorbent materials In a continuous manufacturing process, two cover materials are joined together using ultrasonic welding, both longitudinally and transversely. The sonotrode operates at 30 kHz, and the cover materials are welded at a speed of 10 m / min. The weld seam geometry is continuous and corresponds to structure a in Figure 7, with a width of 3 mm. The pockets created in this way are filled with the appropriate amount of superabsorbent particles (see table) before being sealed. Filling is carried out via an automatic dosing system integrated into the continuous production system. The shape and size of the seams for optimized distribution of the liquid to be absorbed are created directly with the welding tools used in the manufacturing process.The final size of the absorbent pad is obtained by cutting directly into the system or as a process step linked directly afterwards. The following absorbent pads were produced: Table 1 IVIA / a / ZUZ I / UUOUZ4 Absorbent pad I not according to the invention Absorbent pad II according to the invention Absorbent pad III according to the invention Textile surface structure (two layers) 40 g / m2 PET / coPES non-woven fabric, calendered 40 g / m2 PET / coPES non-woven fabric, calendered 40 g / m2 PET / coPES non-woven fabric, calendered Absorbent pad size (mm) 200 x 290 200 x 290 200 x 290 Number of pockets 1 4 8 Welding type Figure 7 aaa Total superabsorbent (g) 12.5 12.5 12.5 Welding seam width (mm) 3 3 3 Superabsorbent (g / pocket) 12.5 12.5 12.5 Superabsorbent type Partially neutralized polyacrylic acid Partially neutralized polyacrylic acid Partially neutralized polyacrylic Absorption capacity (g) 1 min 251 326 3205 5 min 319 459 446 15 min 402 598 585 30 min 524 670 635 60 min 639 721 670 It turns out that the absorbent pads according to the invention, with four or eight pockets, have a higher absorption rate than a system with one pocket for the same amount of superabsorbent. Furthermore, the absorbent pads according to the invention were found to exhibit good retention of the coolant and inflate in a controlled manner. Measurement of absorption kinetics: The measuring apparatus is set up as shown in Figure 6, and 200 g of coolant 17 is placed in the instrument tray. The distance between the end of the hose and the bottom of the instrument tray is set to 3 mm so that when the coolant level drops, the coolant continues to flow out of the container. If the system reaches equilibrium (i.e., no more coolant flows out of the container), the prefabricated absorbent pad is placed in the instrument housing so that the superabsorbent particles are located in one corner of the pad. Time is stopped, and the weight loss is recorded using the balance. The kinetic values ​​are shown in Table 1 and Figure 10.

Claims

CLAIMS 1. Use of an absorbent material, comprising a cover and superabsorbent particles arranged therein for the absorption and / or distribution of liquids in an active and / or passive cooling current transport system, in particular in an actively and / or passively cooled electricity storage system, the cover being formed from at least two layers arranged one on top of the other, wherein the layers are connected to each other in some areas by at least one seam such that the cover is segmented into pockets that are delimited from each other and wherein at least a part of the pockets contains the superabsorbent particles.

2. Use according to claim 1, wherein the seam is designed as a weld seam, in particular as a thermally and / or ultrasonically welded seam, adhesive seam and / or stitched seam.

3. Use according to claim 1 or 2, wherein the current transport system is selected from an electricity storage system, in particular a battery system, a current-carrying power converter, a transformer, a power electronics system, an electronic control system, in particular a processor-controlled system, a charging station, an inverter, a rectifier, an electrolyzer and / or combinations thereof.

4. Use in accordance with one or more of the preceding claims, wherein the liquids to be absorbed by the system in accordance with the invention are refrigerant liquids and / or water, preferably alcohols, in particular glycol mixtures and / or alcohol / water, in particular glycol / water mixtures.

5. Use in accordance with one or more of the preceding claims, wherein the stitching is discontinuous.

6. Use according to one or more of the preceding claims, wherein the seam area is at least 0.4 to 50% of the area, more preferably 2 to 40% of the area, and particularly preferably 4 to 35% of the area, each based on the total area of ​​the absorbent material.

7. Use in accordance with one or more of the preceding claims, wherein the seam is configured as a weld seam perforated in its center.

8. Use according to one or more of the preceding claims, wherein the seam is configured as a weld seam, and the thickness of the weld seam increases, preferably continuously, in the direction of at least one pocket adjacent to the weld seam.

9. Use in accordance with one or more of the preceding claims, wherein the number of pockets per m2 of absorbent material is in the range of 4 to 400 pockets per square meter.

10. Use in accordance with one or more of the preceding claims, wherein the quantity of superabsorbent particles is from 20 to 1000 g / m2 referred to the area of ​​the absorbent material.

11. Use in accordance with one or more of the preceding claims, wherein the amount of superabsorbent particles per bag is 0.5 g to 500 g.

12. Use according to one or more of the preceding claims, wherein at least one pocket, in addition to the superabsorbent particles, contains a filling material, for example, absorbent materials such as cellulose pulp, fibers, guar, silica gel and / or foam, in particular in an amount of 5 to 90% by weight.

13. Use according to one or more of the preceding claims, wherein at least one layer of the cover has a flat textile structure, in particular a non-woven fabric, a woven fabric, a knitted fabric and / or an open-pore foam.

14. Use according to one or more of the preceding claims, wherein the average pore size 5 of the textile fabric, measured according to ASTM E 1294-89, is from 1 to 1000 pm.

15. Use in accordance with one or more of the preceding claims, wherein the absorbent material has a liquid (deionized water) absorption capacity of 2 l / m2 to 300 l / m2.

16. Use according to one or more of the preceding claims, wherein the absorbent material is present as an absorbent pad.

17. An active and / or passive cooling current transport system, in particular an electricity storage system, characterized in that it comprises an absorbent material, comprising a cover and superabsorbent particles arranged thereon for the absorption and distribution of liquids in the current transport system, wherein the cover is formed by at least two layers arranged in two dimensions one above the other, the layers being partially connected to each other such that segmentation of the cover results in the form of pockets delimited from each other by seams, and at least some of the pockets having the superabsorbent particles.