Energy storage unit

Abstract

The present invention relates to an energy storage cell comprising: (i) a glass fiber fabric having a first side and a second side opposite thereto; (ii) wherein the first side is coated with a first metal layer made of a first metal, in particular copper, and the second side is coated with a second metal layer made of a second metal, in particular aluminum; (iii) wherein the first metal layer is coated with a first active material layer consisting of a first active material and the second metal layer is coated with a second active material layer consisting of a second active material, the first active material and the second active material being suitable for intercalating or deintercalating ions, in particular lithium ions, respectively; (iv) wherein the glass fiber fabric is adapted to conduct ions, in particular lithium ions, using an electrolyte, thereby enabling ions to be exchanged between the first active material layer and the second active material layer.

Description

TECHNICAL FIELD

[0001] The present application relates to an energy store cell, to a battery module, to a motor vehicle and to a method for producing an energy store cell. BACKGROUND

[0002] In the field of energy store cells, in particular battery cells, in particular lithium-ion battery cells, cylindrical and prismatic hard-shell and pouch-like battery cells are known. Battery cells for storing electrical energy play a central role in the so-called electric mobility sector, both in vehicles with purely electric drive and in vehicles with hybrid drive. For example, a battery module for a 12 V starter battery can have four battery cells, while a high-voltage accumulator can have a plurality of battery modules. Cylindrical lithium-ion battery cells can have an electrode winding in which the electrodes, together with the separators, are wound in the order separator-anode-separator-cathode in a spiral around a winding core. The electrodes, in particular the composite electrodes, can have a mixture of active material, binder and conductive additive. The mixture can be applied as a thin layer on both sides of the current lead-out body.

[0003] In the assembled state, the battery cell can have loosely wound or stacked electrode-separator assemblies. Due to this loose arrangement, the electrodes can move relative to each other in the battery cell during manufacture (winding / stacking process) and / or during operation, whereby mispositioning can occur, whereby the battery cell can become unreliable in operation. For example, an internal electrical short circuit can be triggered in operation by this movement.

[0004] It is also known that the electrode-separator assemblies are laminated and formed into a stack in a hot-pressing process. Here, due to the lamination onto the separator, the pore structure of the separator can change as a result of the temperature and pressure, whereby the separator can also shrink. Furthermore, an adhesion promoter, which needs to be applied between the interfaces, is required for this method, which requires volume, which reduces the energy density of the battery cell. Furthermore, the manufacturing costs are increased by this process. SUMMARY

[0005] It was therefore the task of the present application to give an energy store cell which is improved in the above-mentioned problems.

[0006] The solution of the task is achieved according to the teaching of the independent claims. Different embodiments and refinements of the application are the technical solutions of the dependent claims.

[0007] A first aspect of the solution relates to an energy storage cell comprising: (i) a glass fiber fabric having a first side and a second side opposite thereto; (ii) wherein the first side is coated with a first metal layer composed of a first metal, in particular copper, and the second side is coated with a second metal layer composed of a second metal, in particular aluminum; (iii) wherein the first metal layer is coated with a first active material layer composed of a first active material, and the second metal layer is coated with a second active material layer composed of a second active material, wherein the first active material and the second active material are adapted to intercalate or deintercalate ions, in particular lithium ions, respectively; (iv) wherein the glass fiber fabric, in particular a glass fiber fabric having a porous structure, is adapted to conduct ions, in particular lithium ions, in the presence of an electrolyte, thereby enabling an exchange of ions between the first active material layer and the second active material layer.

[0008] The terms "comprising", "containing", "including", "having" or "with" or any other variant thereof, used in this document, are intended to cover a non-exclusive inclusion. For example, a method or an apparatus that comprises or has a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such method or apparatus.

[0009] Further, unless expressly provided otherwise, "or" means an inclusive "or", not an exclusive "or". For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).

[0010] The terms "one" or "an" as used herein, are defined as "one or more" unless explicitly indicated to the contrary. The terms "another" and "additional" and any other variant thereof are understood to mean "at least one additional".

[0011] The term "plurality" as used herein is understood to mean "two or more".

[0012] The terms "configuring" or "setting" as used herein for fulfilling a specific function (and respective modifications thereof) are to be understood as meaning that a corresponding device is already present in a design or setting in which the device is able to carry out the function or which can at least be set, i.e. configured, in such a way that the function can be carried out after the corresponding setting. The configuration can be achieved here, for example, by means of parameters of a corresponding setting procedure flow or switches for activating or deactivating functions or settings, etc. In particular, the device can have a plurality of predefined configurations or operating modes, so that a configuration can be carried out by selecting one of these configurations or operating modes.

[0013] The term "active material" as used herein is understood to be, inter alia, a material which can be electrochemically active and which is configured for coating an electrode for an electrode jellyroll of a battery cell, and into which ions, in particular lithium ions, can be intercalated. Here, the active material for the cathode can be, inter alia, lithium nickel manganese cobalt oxide (NMC), lithium cobalt oxide (LCO), lithium nickel oxide (LNO), lithium nickel cobalt aluminum oxide (NCA), lithium nickel manganese oxide (LMR), lithium manganese oxide spinel (LMO), lithium iron phosphate (LFP), lithium manganese iron phosphate (LMFP), lithium nickel manganese oxide spinel (LNMO), combinations of the aforementioned materials, or other materials. Lithium nickel manganese cobalt oxide (NMC) can exist in different stoichiometries, in particular as NMC111, NC532, NMC6222, or NMC811.

[0014] The active material for the anode can be, inter alia, with graphite (natural graphite, artificial graphite), hard carbon, soft carbon, silicon (Si), nanosilicon, silicon oxide (SiOx), silicon carbide (SiC), silicon-carbon composite, lithium titanate (LTO, Li4Ti50i2), metallic lithium (Li), and combinations thereof or other materials.

[0015] The term "binder" as used herein is understood to be, inter alia, a binding medium (also referred to as electrode binder) which can be applied to the current lead together with the active material and the electrically conductive additive. The binding medium is, inter alia, selected from the group comprising polyethylene oxide (PEO), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), polyvinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP), cellulose, acrylates (e.g. polymethyl methacrylate), polyvinylpyrrolidone (PVP), styrene butadiene rubber (SBR), polyisobutylene (PIB), and mixtures thereof.

[0016] The term "separator" or "separator layer" as used herein is understood to be, inter alia, an electrically insulating means which separates and spaces the anode from the cathode. The separator or separator layer can also at least partially contain an electrolyte, wherein the electrolyte preferably contains lithium ions. The electrolyte can also be in electrochemical connection with the adjacent layers of the electrode stack or electrode jellyroll. Preferably, the separator is configured as a thin-walled, particularly preferably as a microporous membrane or a fabric, in particular a glass fiber fabric. Preferably, the separator layer or separator is impregnated with an additive which also improves the mobility of the separator layer or separator. Particularly preferably, the impregnation is carried out with an ionic additive. Preferably, the separator layer or separator extends at least locally beyond the boundary edges of at least one electrode. Particularly preferably, the separator layer or separator extends beyond all boundary edges of the adjacent electrodes. The separator can also have a solid inorganic lithium ion conductor.

[0017] The term "electrolyte" as used herein is to be understood as a liquid, gel-like or solid material through which ions can be conducted, thereby allowing the transport of electric current between the electrodes of a battery, in particular between the cathode and the anode. In contrast to the electronic conductivity (by electrons) in electrode materials, the electrolyte must be ionically conductive, i.e. conduct electric current by transporting charged atoms or molecules (ions). In particular, the electrolyte has a high electrical resistance. The electrolyte is advantageously chemically stable against decomposition within a wide temperature window and has electrochemical stability within as large a voltage window as possible. Ideally, it is non-toxic and non-flammable, and at least has a high flash point and a low heat of combustion. Liquid systems can be preferred over polymer, gel and solid electrolytes due to better conductivity.

[0018] The term "current lead-out" as used herein is to be understood here as an element made of an electrically conductive material. It serves to conduct electric current or electrons between two points which are geometrically separated from one another and can at the same time fulfil the function of a mechanical carrier, for example for a coating applied thereon.

[0019] The term "glass fiber fabric" as used herein is to be understood in particular as a fiber-based planar structure. The glass fiber fabric can in particular be configured as a glass fiber random layup and have a porous structure.

[0020] By means of the energy storage cell according to the first aspect, the first metal layer and the second metal layer are each material-locked connected with the glass fiber fabric. In operation of the energy storage cell, the first metal layer can in particular have a different electrode polarity than the second metal layer, and the voltage of the energy storage cell can be tapped (abgreifen) on the first metal layer and the second metal layer. Furthermore, the first active material layer and the second active material layer are each material-locked connected with the respective first metal layer or second metal layer. Thereby, a secure connection of the above-mentioned components or layers relative to one another is achieved, so that also a defined positioning of the individual components or layers relative to one another is achieved. Thus, a movement of the layers which are material-locked connected with one another can be prevented as reliably as possible, but at least reduced. Furthermore, experimental investigations have shown that the metallization of the glass fiber fabric surface, i.e. of the first side and the second side, is sufficient to guarantee the current collector function in terms of current-carrying capacity.

[0021] Preferred embodiments of the energy storage cell are described below, which can each be combined arbitrarily with one another and with further described other aspects, unless explicitly excluded or technically impossible.

[0022] In some embodiments, the surface of the glass fibers of the first side or the second side of the glass fiber fabric, in particular the surface of all glass fibers, has areas coated with the first metal layer or the second metal layer and uncoated areas, wherein the uncoated areas are oriented towards the inner region of the glass fiber fabric. Such a metal layer can be applied to a glass fiber fabric made (in particular according to the prior art) with relatively little outlay, since the first side and the second side are directly accessible before the first active material and / or the second active material is coated and thus, in particular, can be coated by a deposition method. Here, the inner region is to be understood as the region which is arranged inside the glass fiber fabric, i.e. not on the surface or the side of the glass fiber fabric and thus cannot be directly coated and thus remains uncoated in the coating.

[0023] In some embodiments, the surface of the glass fibers of the first side or the second side of the glass fiber fabric, in particular the surface of all glass fibers, is essentially completely coated with the first metal or the second metal. By complete coating, the electrical contact can be improved. Since this coating of the glass fibers is preferably carried out before the glass fibers are woven with the glass fiber fabric (since otherwise the coating would be complicated due to the inaccessible areas), contamination of the glass fiber fabric or the energy storage cell by metal particles during the coating can be reduced. Here, essentially complete coating is to be understood as a coating in which at least 90% of the surface of the glass fibers is coated.

[0024] In some embodiments, the first metal, which is in particular configured as an anode current lead, has copper or nickel, and / or the second metal, which is in particular configured as a cathode current lead, has aluminum. Copper, nickel and aluminum each have good electrical conductivity and are thus preferred materials for the first metal layer and the second metal layer.

[0025] A second aspect of the solution relates to a battery module having a plurality of energy storage cells according to the first aspect.

[0026] In some embodiments, the plurality of energy storage cells are arranged next to one another such that the energy storage cells adjacent to one another are mechanically connected to one another by coating with the same active material. Thereby, it can be achieved that in the case of a relative movement of the energy storage cells to one another, the risk of an electrical short circuit is reduced, since the metal layer consisting of the same material as the first metal or the second metal, respectively, is arranged opposite the adjacent battery cell, respectively.

[0027] A third aspect of the solution relates to a motor vehicle having an electric drive or a hybrid drive and a battery module according to the second aspect.

[0028] A fourth aspect of the solution relates to a method, in particular a computer- implemented method, for manufacturing an energy storage cell, comprising the following steps: (i) providing a glass fiber fabric having a first side and a second side opposite thereto; (ii) coating the first side with a first metal to form a first metal layer; (iii) coating the second side with a second metal to form a second metal layer; (iv) coating the first metal layer with a first active material; (v) coating the second metal layer with a second active material, wherein the first active material and the second active material are adapted to intercalate or deintercalate ions, in particular lithium ions, respectively; (vi) wherein the glass fiber fabric, in particular the glass fiber fabric having a porous structure, is adapted to conduct ions, in particular lithium ions, in the presence of an electrolyte, thereby enabling an exchange of ions between the first active material layer and the second active material layer.

[0029] By the second aspect, it can be achieved that the energy storage cell can be manufactured in an integrated process. In contrast to known methods, in which electrodes composed of different metals are coated separately and a separator is subsequently arranged between the electrodes, according to the second aspect, the first metal layer and the second metal layer are applied directly on the separator. Thereby, a simplified manufacturing is achieved.

[0030] In the following, preferred embodiments of the method are described, which can be combined with each other arbitrarily, respectively, and with further described other aspects, unless explicitly excluded or technically not possible.

[0031] In some embodiments, the coating of the first side with the first metal and the coating of the second side with the second metal are performed substantially simultaneously. Thereby, one working step or one separate coating step can be saved and the coating of the first side and the second side can be performed more efficiently.

[0032] In some embodiments, the coating with the first active material and the coating with the second active material are performed substantially simultaneously. Thereby, one working step or one separate coating step can be saved and the coating of the first metal layer and the second metal layer can be performed more efficiently.

[0033] Herein, substantially simultaneous coating is to be understood as a coating which is substantially parallel in time. Herein, a substantially simultaneous coating exists if at least one section or area of the battery cell is coated from both sides simultaneously.

[0034] In some embodiments, coating the first side with the first metal and / or the second side with the second metal is achieved by substantially completely coating the surface of the glass fibers of the glass fiber fabric before they are woven into the glass fiber fabric and subsequently weaving the glass fiber fabric together on the respective first or second side. Thereby, contamination of the glass fiber fabric or the energy storage cell by metal particles can be reduced, since the metal coating takes place outside of the glass fiber fabric. Furthermore, by substantially completely coating the surface of the glass fibers, an improved electrical contact to the coating can be achieved and charge carriers can be more effectively received.

[0035] The features and advantages described in relation to the first aspect of the solution are also correspondingly applicable to the other aspects described. BRIEF DESCRIPTION OF DRAWINGS

[0036] Further advantages, features and application possibilities result from the following description of preferred embodiments in conjunction with the attached drawings.

[0037] Herein is shown:

[0038] Figure 1 A battery cell according to an embodiment is schematically shown;

[0039] Figure 2 A battery cell stack according to an embodiment is schematically shown;

[0040] Figure 3 A flow chart for explaining a preferred embodiment of the method is schematically shown;

[0041] Figure 4 A wet coating according to an embodiment is schematically shown; and

[0042] Figure 5 A dry coating according to an embodiment is schematically shown. DETAILED DESCRIPTION

[0043] In the drawings, identical reference numerals are used for identical or corresponding elements throughout the various drawings.

[0044] Figure 1 A battery cell 100 according to an embodiment is schematically shown in Fig.

[0045] The battery cell 100 has a glass fiber fabric 110 composed of a plurality of glass fibers 120. Here, the glass fiber fabric 110 is configured as a mechanically flexible planar organization. The glass fiber fabric 110 is electrically insulating, but permeable or conductive to ions, in particular to lithium ions. In this respect, the glass fiber fabric 110 functions as a separator in the battery cell 100. The glass fiber fabric 110 is coated on opposite sides with a metal each. Here, the glass fiber fabric 110 has a copper layer 130 on a first side, which constitutes an anode in the battery cell 100. On a second side opposite the first side, the glass fiber fabric 110 has an aluminum layer 140, which constitutes a cathode in the battery cell 100. On the copper layer 130, a first active material layer 150 composed of a first active material, in particular graphite, is arranged. On the aluminum layer 140, a second active material layer 160 composed of a second active material, in particular NMC, is arranged.

[0046] The first and second active materials are each adapted to intercalate or deintercalate ions, in particular lithium ions, also known as interkalation or deinterkalation, so that in operation of the battery cell 100, ions can be exchanged between the first active material layer 150 and the second active material layer 160 through the glass fiber fabric 110.

[0047] In the present embodiment, the glass fibers 120 coated with aluminum and copper are each coated over their entire surface. This can be achieved by individually coating the glass fibers 120 before weaving into the glass fiber fabric 110. By complete coating of the glass fibers 120 arranged on one side of the glass fiber fabric 110, a greater metal contact area can be achieved.

[0048] It is also conceivable that the glass fibers 120 of an already completed glass fiber fabric 110 are coated, in particular by a deposition method, with aluminum or copper. In this case, the copper layer 130 and the aluminum layer 140 are each only constituted on one region of the surface of the glass fibers 120, while another region of the surface of the relevant glass fibers 120 arranged inside the glass fiber fabric 110 is not coated.

[0049] Figure 2 A battery cell stack 200 according to an embodiment is schematically shown in the middle.

[0050] The battery cell stack 200 has four battery cells 100, which are arranged on top of each other in the y-direction of the shown coordinate system. Again, the battery cell stack 200 can have fewer or more than four battery cells 100.

[0051] Here, the battery cells 100 in the battery cell stack 200 that are adjacent to each other are mechanically connected to each other by a coating of the same active material 150 or 160, respectively. For example, the first battery cell 100 in the drawing plane and at the very bottom or lowest with respect to the y-axis and the next, i.e. the second battery cell 100 arranged above it are mechanically connected to each other by their respective first active material layer 150. This means that the first active material layer 150 of the battery cell 100 at the very bottom is mechanically connected to the first active material layer 150 of the battery cell 100 arranged above it. This is achieved by the battery cell at the very bottom being rotated by 180° with respect to the battery cell 100 located above it with respect to the y-direction.

[0052] The copper layer 130 of the battery cell 100 is connected to the first line 210, respectively. The aluminum layer 140 of the battery cell 100 is connected to the second line 220, respectively. Thereby, a total voltage of the battery cells 100 connected to each other in parallel can be obtained, which is indicated by the double arrow and the symbol "U" for voltage in Figure 2

[0053] This arrangement also provides the advantage that the risk of an electrical short circuit is reduced when the battery cells 100 or the respective layers of the battery cells 100 move relative to each other in operation. This is because the metal layers of adjacent battery cells 100 that are composed of the same material are arranged opposite to each other, respectively. In the case of the battery cell 100 at the very bottom and the battery cell 100 arranged above it in the present embodiment, their copper layers 130 are arranged opposite to each other, respectively, with their respective first active material layers 150 arranged adjacent to each other therebetween.

[0054] The battery cell stack 200 can be mounted in a housing (not shown here). Here, the housing can be chosen with respect to the size of the battery cell stack 200 such that in the first cycle of the battery cell stack 200, a volume expansion of the battery cell stack 200 occurs, thereby pressing the battery cell stack 200 in the housing. Thereby, an additional prevention of a movement of the battery cells 100 or their layers relative to each other can be achieved.

[0055] Figure 3 A flowchart 300 for illustrating a preferred embodiment of a method for manufacturing a battery cell 100 is shown schematically in

[0056] In a first step S310 of the method, a glass fiber fabric 110 is provided having a first side and a second side opposite thereto.

[0057] In a further step S320 of the method, the first side is coated with copper to form a copper layer 130 and the second side is coated with aluminum to form an aluminum layer 140. Here, the coating of the copper layer 130 and the aluminum layer 140 is performed substantially simultaneously. ​

[0058] During the operation of the battery cell 100, the copper layer 130 has different polarity than the aluminum layer 140, and the voltage of the battery cell 100 can be obtained on both the copper layer 130 and the aluminum layer 140.

[0059] In another step S330 of the method, a copper layer 130 is coated with a first active material, particularly graphite, and an aluminum layer 140 is coated with a second active material, particularly lithium nickel manganese cobalt oxide (NMC). Here, the coating of the first active material and the second active material 140 are performed substantially simultaneously.

[0060] Here, the first active material and the second active material are respectively suitable for inserting or extracting ions, especially lithium ions.

[0061] The glass fiber fabric 110 is suitable for conducting lithium ions, thereby enabling the exchange of lithium ions between the first active material layer 150 and the second active material layer 160.

[0062] exist Figure 4 The diagram schematically illustrates a wet coating process according to one embodiment. A portion of a battery cell 100 is shown, coated along the y-direction. Here, one area of ​​the fiberglass fabric 110 has been coated with a copper layer 130 or an aluminum layer 140, and a first active material layer 150 or a second active material layer 160. Conversely, another area of ​​the fiberglass fabric 110 is coated with a copper layer 130 or an aluminum layer 140, but not with the first active material layer 150 or the second active material layer 160. The coating of the first active material layer 150 or the second active material layer 160 is performed here by a so-called wet coating process using nozzles 400 schematically shown, which coat the aluminum- or copper-coated fiberglass fabric 110 substantially simultaneously from both sides in the x-direction with the corresponding active material.

[0063] exist Figure 5 The image schematically illustrates a dry coating process according to one embodiment. A portion of a battery cell 100 is shown, coated along the y-direction. Here, one area of ​​the fiberglass fabric 110 is coated with a copper layer 130 or an aluminum layer 140, and a first active material layer 150 or a second active material layer 160. Conversely, another area of ​​the fiberglass fabric 110 is coated with a copper layer 130 or an aluminum layer 140, but not with the first active material layer 150 or the second active material layer 160. The coating of the first active material layer 150 or the second active material layer 160 is performed here by a so-called dry coating process using a laminating apparatus 500 schematically shown, which coats the aluminum- or copper-coated fiberglass fabric 110 substantially simultaneously from both sides in the x-direction with the corresponding active material. The lamination performed by the laminating apparatus is achieved at a predetermined temperature and a predetermined pressure.

[0064] While at least one example embodiment has been described above, it should be noted that there are numerous variations to this. It should also be noted here that the example embodiments described are merely non-limiting examples and are not intended to limit the scope, applicability or configuration of the devices and methods described herein by these examples. Rather, the foregoing description will provide one of ordinary skill in the art with an enabling detailed description for implementing at least one example embodiment, and it is understood that various changes can be made in the function and arrangement of elements described in the example embodiments without departing from the subject matter respectively as it is defined in the appended claims and their legal equivalents.

[0065] List of reference signs

[0066] 100 battery cell

[0067] 110 glass fiber fabric

[0068] 120 glass fiber

[0069] 130 copper layer

[0070] 140 aluminum layer

[0071] 150 first active material layer

[0072] 160 second active material layer

[0073] 200 battery cell stack

[0074] 210 first line

[0075] 220 second line

[0076] 300 flowchart for explaining the method

[0077] S310 providing a glass fiber fabric

[0078] S320 coating with aluminum or copper

[0079] S330 coating with a first active material layer or a second active material layer

[0080] 400 nozzle

[0081] 500 laminating device

Claims

1. An energy store cell (100), comprising: a glass fiber fabric (110) having a first side and a second side opposite the first side; wherein the first side is coated with a first metal layer (130) composed of a first metal and the second side is coated with a second metal layer (140) composed of a second metal; wherein the first metal layer (130) is coated with a first active material layer (150) composed of a first active material and the second metal layer is coated with a second active material layer (160) composed of a second active material, wherein the first and second active materials are adapted to intercalate and deintercalate ions, respectively; wherein the glass fiber fabric (110) is adapted to conduct ions in the presence of an electrolyte, thereby enabling ions to exchange between the first active material layer (150) and the second active material layer (160).

2. The energy reservoir cell of claim 1, wherein, the surface of the glass fibers (120) of the first or second side of the glass fiber fabric (110) has areas coated with the first metal layer (130) or the second metal layer (140) and uncoated areas, wherein the uncoated areas are oriented towards an inner region of the glass fiber fabric (110).

3. The energy reservoir cell of claim 1, wherein, the surface of the glass fibers (120) of the first or second side of the glass fiber fabric (110) is substantially completely coated with the first metal or the second metal.

4. The energy reservoir cell according to any of the preceding claims, characterized in that, the first metal has copper or nickel and / or the second metal has aluminum.

5. A battery module (200) comprising a plurality of energy store cells (100) according to any of the preceding claims.

6. The battery module of claim 5, wherein, The plurality of energy store cells (100) are arranged side by side such that energy store cells (100) adjacent to each other are mechanically connected to each other by a coating of the same active material, respectively.

7. A motor vehicle having an electric drive or a hybrid drive and a battery module according to claim 5 or 6.

8. A method for manufacturing an energy store cell (100), comprising the following steps: providing a glass fiber fabric (110) having a first side and a second side opposite the first side; coating the first side with a first metal to form a first metal layer (130); coating the second side with a second metal to form a second metal layer (140); coating the first metal layer (130) with a first active material; coating the second metal layer (140) with a second active material; wherein the first and second active materials are adapted to intercalate and deintercalate ions, respectively; wherein the glass fiber fabric (110) is adapted to conduct ions in the presence of an electrolyte, thereby enabling ions to exchange between the first active material layer (150) and the second active material layer (160).

9. The method of claim 8, wherein, coating the first side with the first metal and coating the second side with the second metal are performed substantially simultaneously.

10. The method according to claim 8 or 9, characterized in that, coating with the first active material and coating with the second active material are performed substantially simultaneously.

11. The method according to any one of claims 8 to 10, characterized in that, coating the surfaces of the glass fibers (120) of the glass fiber fabric (110) substantially completely before the glass fibers are woven into the glass fiber fabric (110) and subsequently woven together with the glass fiber fabric (110) on the respective first or second side.

12. A method for manufacturing an energy storage cell (100), comprising the following steps: providing a glass fiber fabric (110) having a first side and a second side opposite to the first side; coating the first side with a first metal to form a first metal layer (130); coating the second side with a second metal to form a second metal layer (140); coating the first metal layer (130) with a first active material; coating the second metal layer (140) with a second active material; wherein the first and second active materials are adapted for intercalating and deintercalating ions, respectively; wherein the glass fiber fabric (110) is adapted to conduct ions in the presence of an electrolyte, thereby enabling an exchange of ions between the first active material layer (150) and the second active material layer (160), wherein coating the first side with the first metal and coating the second side with the second metal is performed by substantially completely coating the surfaces of the glass fibers (120) of the glass fiber fabric (110) before the glass fibers are woven into the glass fiber fabric (110) and subsequently woven together with the glass fiber fabric (110) on the respective first or second side.

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