EP2805364A1 - Accumulateur d'énergie ou convertisseur d'énergie électrochimique - Google Patents
Accumulateur d'énergie ou convertisseur d'énergie électrochimiqueInfo
- Publication number
- EP2805364A1 EP2805364A1 EP13700620.1A EP13700620A EP2805364A1 EP 2805364 A1 EP2805364 A1 EP 2805364A1 EP 13700620 A EP13700620 A EP 13700620A EP 2805364 A1 EP2805364 A1 EP 2805364A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- energy converter
- sealing material
- electrochemical energy
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003566 sealing material Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000011262 electrochemically active material Substances 0.000 claims abstract description 5
- 238000012983 electrochemical energy storage Methods 0.000 claims description 20
- 238000004806 packaging method and process Methods 0.000 claims description 14
- 238000004146 energy storage Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000000565 sealant Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000011491 glass wool Substances 0.000 claims description 2
- 239000011149 active material Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 14
- 239000000126 substance Substances 0.000 description 10
- 150000004760 silicates Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001364 causal effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
- H01M8/0282—Inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/191—Inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0286—Processes for forming seals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to an electrochemical energy store or energy converter, in particular a rechargeable bare electrochemical
- Electrochemical energy storage devices or energy converters in particular secondary cells for supplying electrical consumers, in particular motor vehicle drives, are known from the prior art.
- Secondary cells each have a housing, an electrode assembly for providing electrical energy and usually two current conductors.
- the current conductors extend at least partially out of the housing into the environment of the secondary cell. Inside the case are the
- Electrode assembly and the current conductor electrically connected to each other.
- the lifetime and reliability of some known types of electrochemical energy storage or energy converters is often perceived as insufficient.
- the object is achieved by an electrochemical energy storage or
- an electrochemical energy storage or a
- electrochemical energy converter with an electrochemically active material in a package or in a housing made of electrochemically inactive material, wherein at least one wall of the package or the housing or at least one in or on a wall of the package or the housing attached or arranged means of
- An electrochemical energy store in the sense of the invention means a device which can store energy in chemical form and deliver it in electrical form to a consumer. Accordingly, an electrically rechargeable or rechargeable electrochemical
- Electrochemical energy stores are preferably constructed from a plurality of electrochemical cells which are electrically connected in parallel and / or in series. Such electrochemical energy stores are also referred to as batteries. Rechargeable electrochemical cells are also called secondary cells. Important examples of secondary electrochemical cells are so-called Li-ion cells. Important examples of batteries are vehicle batteries made of a plurality of Li-ion cells.
- An electrochemical energy converter in the sense of the invention means a device which can convert chemical energy into electrical energy, without the interposition of a heat engine and a generator.
- electrochemical energy converters are so-called fuel cells.
- An electrochemically active material in the context of the invention means a material which is involved in the conversion of chemical energy into electrical energy.
- an electrochemically active material are electrodes, separators permeated by electrolytes, electrolytes and aggregates of such materials as, for example
- Electrode stack or electrode coil Electrode stack or electrode coil.
- An electrochemically inactive or inactive material in the sense of the invention is to be understood as meaning a material which is not involved in the conversion of chemical energy into electrical energy.
- Important examples of an electrochemically inactive material are packaging of cells or housings of batteries.
- Packages of cells are preferably made of multilayer composites of films of different materials, including plastics and metals.
- a sealing material is to be understood as meaning a material which is suitable or at least intended for
- Isolation effect of a package or a housing to improve or - especially under adverse conditions - to secure or seal a leak in the package or in the housing or an opening in one Device of energy storage or energy converter to close.
- a sealing material which increases its specific volume when a threshold temperature is exceeded.
- Exceeding a threshold temperature in the context of the invention is a
- the or a temperature of a material increases with time and at a certain time, preferably depending on the physical, chemical and / or other properties of the material temperature, the threshold temperature, and then exceeds. Even before reaching or exceeding the threshold temperature, the specific volume, ie the volume per unit mass or per
- a sealing material according to the invention already enlarge. At and possibly after crossing the
- Threshold takes place in a sealing material according to the invention in any case a significant increase in the specific volume.
- an electrochemical energy storage or energy converter is provided in which the sealing material is arranged in, on or on the wall of the package or the housing that the
- Exceeding the threshold temperature, increasing the specific volume of the sealing material may help to seal a leak in the package or in the housing or close an opening in a device of the energy store or energy converter.
- This embodiment has the advantage that leaks that may have formed in the wall of the packaging or the housing of the energy storage or energy converter by uncontrolled tearing or tearing of the wall, or openings in a device of the Energy storage or energy converter, for example, in a valve or in a predetermined breaking point, which should allow a temporary escape of gaseous substances, can be closed after eliminating the causal processes. Often, such events occur as a result of events in which the affected energy storage or
- an electrochemical energy storage or energy converter is provided, wherein the sealing material in the
- Threshold temperature absorbs heat from its surroundings.
- the absorption of heat and the delay in exceeding the threshold temperature is preferably effected by a suitable proportion of a substance in the sealing material, which in a suitable
- Temperature range which is preferably just below the
- Threshold temperature passes through a phase transition, in which this material absorbs latent heat before its temperature further increases. For example, if the threshold temperature is above the boiling point of water or other liquid with a phase transition to the vapor phase, then these liquids are to be admixed with such
- Water is preferred in conjunction with silicates or other minerals or materials when these minerals or materials, in combination with water, begin to swell under the action of heat, that is, their specific
- an electrochemical energy storage or energy converter is provided, wherein the sealing material according to the
- Preferred examples of such materials are mixtures of water and silicates or other materials. Is the material swollen and
- an electrochemical energy storage or energy converter is provided, wherein the sealing material fibers,
- a mineral or glass wool preferably comprises a mineral or glass wool.
- Such materials have proved to be particularly suitable, because they except the property, their specific volume when exceeding a Threshold to increase, even more advantageous properties that make their use as sealing materials in the context of the present invention appear particularly advantageous. These properties include their high mechanical stability and good sealability.
- an electrochemical energy storage or energy converter is provided, wherein the sealing material at least before the increase in its specific volume when exceeding a
- Threshold temperature contains water.
- an electrochemical energy storage or energy converter is provided, wherein the sealing material contains a silicate.
- an electrochemical energy storage or energy converter in which the sealing material is arranged as an insert between two layers of the existing of a plurality of layers of packaging or the housing.
- an electrochemical energy storage or energy converter is provided in which the sealing material is disposed at least in places on the outside of the battery case.
- an electrochemical energy storage or energy converter in which the sealing material is arranged so that the occurrence of arcs or sparking in the
- the sealing material consists of a hydrous
- silicates such as sodium silicate or potassium silicate.
- the aqueous solutions of these minerals are also referred to as water glass.
- the sealing material contains not only water and silicates but also fibers, preferably mineral wool.
- Such preparations begin with heat, preferably from a temperature of 100 ° C under pressure (typically about 0.9 N / mm 2 ) to swell or foam. In a very short time (typically about 50 seconds), the specific volume of such materials can increase considerably. This results in a non-flammable, heat-insulating, mechanically stable sealant. This sealant closes joints, gaps and channels tight and is characterized by very good heat insulating properties. In the process of volume increase, the material absorbs heat well, resulting in a cooling effect.
- 1 a schematically shows an electrochemical energy store or energy converter according to the prior art
- 1 b schematically shows an electrochemical energy store or energy converter according to a preferred embodiment of the invention
- Energy storage or energy converter with a housing or a
- Packaging 1 is known from the prior art.
- the packaging is in many cases, in particular in so-called Li-ion cells of the Pouch or Coffebag type, a multilayer film packaging.
- This packaging or a corresponding housing serves to a mass transfer between the interior of the package or the housing in which the
- electrochemically active components of the electrochemical energy storage or energy converter are located, and the environment to prevent, avoid or limit to an appropriate level.
- the packaging is regularly tightly sealed, preferably welded or heat sealed. At some critical points, for example at the points where the electrical connections 3 pass through the wall 2 of the packaging or of the housing, the risk is particularly great that undesired
- Openings or leaks can form.
- a sealing material 4 is arranged at these critical points, which when crossing a Threshold temperature increases its specific volume.
- the arrangement of the sealing material can its
- Volume expansion help to close a leak 5 or 6 opening.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
L'invention concerne un accumulateur d'énergie ou un convertisseur d'énergie électrochimique comportant un matériau à action électrochimique dans un emballage (1) ou dans un boîtier (1) consistant en un matériau ne présentant pas d'activité électrochimique. Une paroi (2) dudit emballage ou boîtier ou bien un dispositif (3) de l'accumulateur d'énergie ou du convertisseur d'énergie, qui est monté ou mis en place dans, sur ou au niveau d'une paroi de l'emballage ou du boîtier, présente au moins par endroits un matériau d'étanchéité (4) qui accroît son volume spécifique lorsqu'une température de dilatation est franchie. Ledit matériau d'étanchéité peut être disposé dans, sur ou au niveau de la paroi de l'emballage ou du boîtier, de sorte que l'augmentation du volume spécifique qui intervient lorsque la température de dilatation est franchie peut contribuer à pallier un défaut d'étanchéité (5) dans l'emballage ou le boîtier ou à fermer une ouverture (6) ménagée dans l'accumulateur d'énergie ou le convertisseur d'énergie.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261587173P | 2012-01-17 | 2012-01-17 | |
DE102012000819A DE102012000819A1 (de) | 2012-01-17 | 2012-01-17 | Elektrochemischer Energiespeicher oder Energiewandler |
PCT/EP2013/000133 WO2013107645A1 (fr) | 2012-01-17 | 2013-01-17 | Accumulateur d'énergie ou convertisseur d'énergie électrochimique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2805364A1 true EP2805364A1 (fr) | 2014-11-26 |
Family
ID=48693062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13700620.1A Withdrawn EP2805364A1 (fr) | 2012-01-17 | 2013-01-17 | Accumulateur d'énergie ou convertisseur d'énergie électrochimique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2805364A1 (fr) |
DE (1) | DE102012000819A1 (fr) |
WO (1) | WO2013107645A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017219324A1 (de) * | 2017-10-27 | 2019-05-02 | Gs Yuasa International Ltd. | Batteriezelle und Verfahren zum Herstellen einer solchen |
FR3073983B1 (fr) * | 2017-11-21 | 2019-11-15 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Collecteur de courant poreux avec languette de connexion electrique dense pour systeme electrochimique etanche |
DE102021133509A1 (de) | 2021-12-16 | 2023-06-22 | Audi Aktiengesellschaft | Energiespeicher für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Herstellen eines Energiespeichers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4156533A (en) * | 1978-04-28 | 1979-05-29 | Minnesota Mining And Manufacturing Company | High temperature gasket |
ITTN20020003A1 (it) * | 2002-01-31 | 2003-07-31 | Doors & More | Guarnizione intumescente |
US7463007B2 (en) * | 2004-03-08 | 2008-12-09 | Black & Decker Inc. | Battery pack housing and packaging |
US9136558B2 (en) * | 2009-08-14 | 2015-09-15 | Philips Plastics Corporation | Impact resistant battery |
-
2012
- 2012-01-17 DE DE102012000819A patent/DE102012000819A1/de not_active Withdrawn
-
2013
- 2013-01-17 EP EP13700620.1A patent/EP2805364A1/fr not_active Withdrawn
- 2013-01-17 WO PCT/EP2013/000133 patent/WO2013107645A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2013107645A1 (fr) | 2013-07-25 |
DE102012000819A1 (de) | 2013-07-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2297803A1 (fr) | Cellule galvanique à protection irréversible | |
EP2180537A2 (fr) | Cellule galvanique pour un accumulateur | |
WO2013107491A1 (fr) | Boîtier pour cellules électrochimiques pour la construction d'un accumulateur d'énergie électrochimique | |
DE102009015687A1 (de) | Galvanische Zelle mit Rahmen | |
WO2013097968A1 (fr) | Module de batterie avec gaine rétractable | |
DE102012212299A1 (de) | Elektrochemischer Speicher und Verfahren zum Herstellen eines elektrochemischen Speichers | |
EP2805364A1 (fr) | Accumulateur d'énergie ou convertisseur d'énergie électrochimique | |
DE102014201856A1 (de) | Sondergehäuse für Batteriezellen | |
DE112011105637T5 (de) | Sekundärbatterie | |
EP4020675A1 (fr) | Cellule de sachet | |
DE102016213159A1 (de) | Hybrid-Lithiumionenbatterie mit Flüssigelektrolytbereich und lokal beheizbarem Feststoffelektrolytbereich | |
DE102013202288A1 (de) | Batteriezelle mit einem ein elastisch federndes Element aufweisenden Arretierkörper | |
EP2978062A1 (fr) | Cellule de batterie | |
DE112015001939T5 (de) | Vorrichtung zur Speicherung von elektrischer Energie | |
DE102014015237A1 (de) | Batterie und Verfahren zur Herstellung einer solchen Batterie | |
DE102009058955A1 (de) | Volumenausgleichsanordnung für Akkumulator | |
WO2014195048A1 (fr) | Soupape de sécurité pour protéger une cellule galvanique contre une surpression néfaste ainsi que couvercle de logement de cellule et cellule galvanique munie d'une soupape de sécurité | |
DE102012224250A1 (de) | Batteriezelle mit Gehäusedeckplatte mit einer durch einen Gewindebolzen verschlossenen Einfüllöffnung | |
DE112015001923T5 (de) | Vorrichtung zur Speicherung von elektrischer Energie | |
WO2014114544A1 (fr) | Module de batterie comprenant un élément thermique | |
DE112010005229B4 (de) | Sekundärbatterie mit nicht wässrigem Elektrolyt | |
DE102013201856A1 (de) | Batteriezelle, Batteriesystem sowie Kraftfahrzeug | |
EP2606522A1 (fr) | Cellule électrochimique comprenant au moins un dispositif de décompression | |
DE102013203037A1 (de) | Batteriezelle mit wenigstens einem eine Öffnung aufweisenden Anschlusspol und Verfahren zur Herstellung einer Batteriezelle | |
DE102012217442A1 (de) | Batteriezelle mit Anordnung zum einfachen Wechseln eines Gehäusepotentials |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20140815 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20150313 |
|
DAX | Request for extension of the european patent (deleted) |