EP2643134A1 - Frame for an electrochemical energy-storage unit - Google Patents
Frame for an electrochemical energy-storage unitInfo
- Publication number
- EP2643134A1 EP2643134A1 EP11796932.9A EP11796932A EP2643134A1 EP 2643134 A1 EP2643134 A1 EP 2643134A1 EP 11796932 A EP11796932 A EP 11796932A EP 2643134 A1 EP2643134 A1 EP 2643134A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blends
- use according
- copolymer
- mixture
- frame
- 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- Withdrawn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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/006—Producing casings, e.g. accumulator cases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0007—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
- B29K2995/0013—Conductive
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a method for producing frame elements for a frame for holding and arranging electrochemical cells in an electrochemical energy storage unit.
- the present invention also relates to the use of certain plastic mixtures for the production of these frame members.
- the frame elements or frames according to the invention are particularly preferably used in electrochemical energy storage units with a high power density.
- electrochemical energy storage units with high power density are used in particular for the operation of motor vehicles with electric drive, for example in vehicles that are driven according to the "hybrid” principle (electric drive and internal combustion engine), and preferably also exclusively or primarily electrically operated vehicles ("electric vehicles", “EV”).
- electrochemical energy storage units with high Power density is preferably used lithium-ion batteries or lithium-polymer batteries.
- Electrochemical energy storage units with high power density have a number of special requirements, in particular with regard to the management or the removal of heat developed during operation of the energy storage unit, which can significantly exceed the heat generation in other or conventional batteries. Furthermore, in the preferred application of such energy storage units for operating motor vehicles, a particularly large number of electrochemical cells must be arranged in an energy storage unit ("battery") to save space and weight in spatially limited conditions. This arrangement should remain dimensionally stable over the entire service life.
- Electrochemical energy storage units also called “batteries” preferably comprise a plurality of electrochemical cells which physically separate units, these units comprising cell stacks located in an enclosure.
- these cell stacks comprise at least two electrodes each having at least one electrochemically active material.
- Abieiter protrude which serve the supply or removal of electricity (to charge or discharge the cell).
- these plurality of cells are electrically connected in series.
- this plurality of electrochemical cells is fixed in a frame with frame elements against each other and against the environment dimensionally stable.
- these electrochemical cells which construct the electrochemical energy storage unit, are preferably flat cells, that is to say have a length dimension (thickness), which at least less than half, preferably less than a quarter, more preferably one-eighth of the other two longitudinal dimensions (height and width) is.
- Such flat cells are preferably cuboid, and not cylindrical or not of a cylinder geometry.
- the electrochemical energy storage unit comprises a plurality of flat cells, which in turn each have at least two Abieiter and a sheath with a first and a second end face and a first and a second flat side.
- the multiplicity of flat cells with their substantially mutually parallel planar sides are stacked one above the other, the absorbers protruding at least partially from the first and / or second end side and at least one drain of a first flat cell having at least one drain of a second flat cell at least one connecting element are electrically connected to each other.
- a frame is arranged between the flat sides of adjacent flat cells.
- this frame should preferably be made of plastic, as well as be designed by the use of positioning and / or connecting means so that the number of parts to be positioned during assembly can be reduced.
- An object of the present invention is therefore to provide a method for the production of frame elements for frames of electrochemical energy units with high power density, or to provide materials which are particularly suitable for such production methods.
- the plastic mixture comprising at least one homopolymer or at least one copolymer or the mixture thereof, which is processed into a frame element or frame, suitable for injection molding (also referred to as "injection molding").
- the present invention also relates to the use of a plastic mixture comprising at least one homopolymer or at least one copolymer, or a mixture thereof, in particular a polymer blend, and further comprising at least one additive selected from the group consisting of: plasticizer, flame retardant, processing aid or elastomer modification means, in a frame member for frames of electrochemical energy storage units, in particular of high power density, said frame member being obtained in an injection molding process.
- Injection molding methods are particularly suited to other prior art methods of making plastic moldings for the present application because these methods are economically advantageous and permit the processing of such plastic materials which meet the above-mentioned particular requirements for frame members in high energy electrochemical energy storage devices Energy density meet.
- the resulting plastic mixture comprising at least one homopolymer or at least one copolymer, or the mixture thereof, which is processed into a frame element or frame, or the frame element itself, substantially electrically insulating, so does not act as an electrical conductor or only as a bad electrical conductor.
- the specific resistance (also known as volume resistivity) of the frame element (plastic molded part) thus obtained is preferably more than 1 ⁇ m (at 20 ° C.), preferably more than 10 5 ⁇ m (at 2 ° C.), more preferably more than 10 10 ⁇ m ( at 20 ° C), more preferably more than 10 15 Dm (for 2 ⁇ X), and more preferably more than 10 20 Qm (at 20 ° C).
- the specific resistance of PET which is a preferred material for the purposes of the present invention, is 10 20 Om (at 20 ° C).
- the measurement of resistivity or volume resistivity is well known to those skilled in the art and is described, for example, in DIN 53482. It is particularly preferred for the purposes of the present invention if the resulting plastic mixture or the thus obtained ne frame element (plastic molding) is not only a bad or no electrical conductor, but also at the same time a good or very good heat conductor.
- thermal conductivities also known as thermal conductivity, specific thermal conductivity or thermal conductivity
- the thermal conductivity of materials, in particular of plastics, is determined according to DIN 53612 and DIN 52613.
- the plastic mixture comprising at least one homopolymer or at least one copolymer, or a mixture thereof, which is processed into a frame element or frame, difficult to ignite, since the electrochemical energy storage unit is housed in a motor vehicle and may optionally be in contact with other combustible materials .
- the issue of flammability / ignitability especially in electrochemical energy storage devices with high energy density of particular importance, since they may contain chemically reactive components, such as flammable solvents or metal ions in unstable oxidation states, as in the case of lithium-ion batteries. In particular, no flame formation or soot development should occur in the frame elements.
- the plastic mixture comprising at least one homopolymer or at least one copolymer, or a mixture thereof, which is worked into a frame element or frame, preferably a material of fire class V0 and preferably contains no halo- or nitrate-containing flame retardants.
- the plastic mixture comprising at least one homopolymer or at least one copolymer, or a mixture thereof, wel Ches is processed into a frame element or frame, suitable that riveting be performed with the frame elements produced therefrom. This is advantageous in particular because the contact rail in the electrochemical energy store is preferably hot-riveted to the frame.
- the temperature of the plastic molding which is obtained from the plastic mixture (here: frame member), a suitable for hot riveting softening temperature, further preferably, the plastic mixture, comprising at least one homopolymer or at least one copolymer, or a mixture thereof, which to a Frame element or frame is processed, have only a slight tendency to relax. As a result, the contact pressure between the contact rail and the heat conductor foil is kept as constant as possible.
- the at least one homopolymer or the at least one copolymer, or the mixture thereof, in the process according to the invention leads to a frame element which, under continuous thermal stress, lasts several weeks, preferably several months (continuous use temperature -40 ° C to + 100 ° C, preferably -30 ° C) ° C to + 50 ° C) has sufficient dimensional stability under operating conditions.
- the H DT / B value of the frame element according to the invention (plastic molding) of 50 ° C to 200 ° C, preferably from 80 ° C to 200 ° C (ISO 75).
- the frame element according to the invention is at least slightly elastic, that is modified with an elastomer, since in this way the connection of the individual frame elements to each other (to the frame) can be carried out particularly advantageous, for example by means of (snap) hook connections.
- the at least one homopolymer is preferably selected from the group comprising: polyamide (PA), thermoplastic polyurethane (PU), polyester (preferably polyethylene terephthalate PET), polyoxymethylene (POM), polyphenylene oxide (PPO), polyphenylsulfide (PPS), polyimide (PI) or Polybutylene terephthalate (PBT).
- the at least one copolymer is preferably selected from the group comprising: PA66 / 6 or PP copolymers.
- PA 66/6 copolymers are known in the art for other applications and can in principle be prepared by known methods. For example, a PA66 / 6 copolymer can be obtained by polycondensation with elimination of water. PA66 / 6 copolymers are particularly preferred for the methods of the invention and the use of the invention.
- the presently preferred class of "PA66 / 6" copolymers is preferably intended to include all copolymers in which the polyamide is polymerized by the simultaneous polycondensation of PA66 and PA6 blocks.
- the proportion of the PA66 blocks is preferably in a range of 10 to 80 wt .-%, preferably 20 to 60 wt .-%, more preferably from 20 to 40 wt .-%, particularly preferably 25 to 35 wt .-%.
- the polyamide has improved flow properties and thus improved processability. Furthermore, this copolymerization leads to an improvement in toughness compared to pure polyamide.
- Preferred polymer blends are mixtures of PC, PP, PBT and PET with elastomeric toughened phase, which are preferably compounded by means of reactive extrusion.
- the frames and frame members of the present invention are preferably used in high power density electrochemical energy storage devices, more preferably lithium ion batteries or lithium polymer batteries.
- the electrochemical energy storage devices of the present invention preferably comprise a plurality of electrochemical cells which are physically separate entities, these entities comprising cell stacks located in an enclosure.
- these cell stacks comprise at least two electrodes each having at least one electrochemically active material. Further preferably projecting from this enclosure Abieiter, which serve to supply or discharge of electric current.
- an electrochemical energy storage unit preferably comprises more than 10 electrochemical cells, more preferably more than 20 electrochemical cells, more preferably more than 30 electrochemical cells, more preferably more than 40 electrochemical cells.
- these electrochemical cells which build up the electrochemical energy storage unit, are preferably flat cells, thus having a length dimension (thickness) which is at least less than half, preferably less than a quarter, more preferably less than one-eighth, the other both length dimensions (height and width) is.
- Such flat cells are preferably cuboid, and not cylindrical or of a cylinder geometry.
- the electrochemical energy storage unit of the present invention preferably has a high power density, preferably more than 100 W / kg, more preferably more than 300 W / kg, more preferably more than 1000 W / kg, particularly preferably more than 2000 W / kg (each at least over 20 sec).
- each individual electrochemical cell preferably a flat cell
- a plurality of frame members with associated electrochemical cell, preferably flat cell is preferably stacked such that 10 or more, preferably 20 or more, more preferably 30 or more, further preferably 40 or more of such frame members with associated electrochemical cell, preferably flat cell, side by side in physical contact, preferably in physical contact over the longitudinal surfaces ("flat side") and not over the side surface of the face ",
- each of the frame element which is preferably formed substantially rectangular, in each case at least two corners, preferably at four corners, in each case at least one positioning and / or connecting means.
- the positioning and / or connecting means are preferably designed as mandrels, hooks, latching noses, snap hook connections or clip connections.
- the heat-conducting foil at the same time has a high thermal conductivity, likewise disclosed in preferred numerical ranges as already described above with respect to the frame elements.
- at least one elastomer-modified polyamide is used as the at least one homopolymer or the at least one copolymer, or as a mixture thereof.
- plasticizers of a similar polar structure to that of the polymer By means of plasticizers of a similar polar structure to that of the polymer, it is possible to make the base polymers of the plastic mixture more flexible.
- the higher elongation and notched impact strength at room temperature places these materials in the vicinity of the thermoplastic polyamide elastomers of equal hardness.
- thermoplastic elastomers based on polyamides in the novel process for the production of frame members.
- At least one block copolymer is used as the at least one homopolymer or the at least one copolymer, or as a mixture thereof.
- Block copolymers alternately comprise sufficiently long "hard” and “soft” segments within the polymer chain. Without being bound by any particular theory or mechanism, it is believed herein that the elastomeric properties in this embodiment are achieved by the chains interacting with each other so that the "hard” segments form aggregated regions and in the amorphous regions Matrix act as physical crosslinking points (in the case of PA elastomers by hydrogen bonds). This physical crosslinking enables thermoplastic processability and, after solidification, causes the behavior of the plastic mixture as an elastomer.
- plastic mixtures according to the invention in the form of elastomers having a high tensile strength is preferably achievable by virtue of the fact that more than two hard segments are present per block copolymer building block.
- thermoplastic PA elastomers is the Vestamid E developed by Hüls AG.
- Mixtures "blends" or polymer alloys) of at least one polyamide with at least one other polyamide are particularly preferred for the purposes of the present invention.
- PA6 / PA66- Blends [preferably 10 to 40% PA66, more preferably 25 to 35%], PA6 / PA66 / PA12 Triblends, PA6 / PA1010 blends, PA6 / PA2 blends or PA1010 / PA12 blends].
- Mixtures of at least one polyamide with at least one further polymer are also preferred for the purposes of the present invention, in particular mixtures of polyamides (PA) with polyolefins.
- PA polyolefin blends are characterized by an increase in impact strength of 3 to 5 times and a reduction in water absorption to one third compared to pure PA.
- Unsaturated acid-containing adhesion promoters are preferably used in these blends. Particular preference is given to:
- HDPE high-density polyolefin, LOPE (low-density polyolefin) and LLDPE (linear low-density polyethylene), preferably in a weight ratio of 5 to 25% PA6, preferably 15 to 20%, preferably im ⁇ / ⁇ blends.
- PA linear low-density polyethylene
- PA6 and / or PA 2 and / or PA66 with PPE polyphenylene ether, poly (oxy-2,6-dimethyl-1, 4-phenylene, PPO), ie mixtures which absorb very little moisture and are therefore more dimensionally stable preferably, the mixing ratio is PA66 / PPO, in weight percent, 5 to 20% PPO, preferably 5 to 10%;
- PA / ABS (acrylonitrile-butadiene-styrene copolymers) blends these have an increased impact resistance, hardness, arc resistance and rigidity in comparison with pure PA; preferred blends include: PA6 / ABS blend (preferably 15-20% ABS) and PA1010 / ABS blends;
- PA6 / PPS polyphenylene sulfide
- PET polyethylene terephthalate
- PA6 blend preferably with 10 to 40% PA6, more preferably 15 to 25%.
- polyamide-based blends have good mechanical properties, such as high abrasion resistance, good corrosion resistance, easy processability, good heat resistance, high continuous service temperature, lower water absorption (as in PA homopolymers), good chemical resistance, low diffusion and a good electrical insulation behavior.
- PC polycarbonate
- ABS polystyrene-butadiene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-
- PC / ABS blends have favorable rheological properties that facilitate processing, as well as low processing shrinkage and low moisture absorption.
- PC / PS blends with 3 to 20%, preferably 5 to 10%
- PC / POM blends 5 to 20% POM, preferably 5 to 10%
- PC / polyolefin blends [ eg PC / PP, PC / PE blend with 5 to 25% polyolefin, in this case preferred polyolefins; LLDPE (linear low density polyethylene) and LDPE (low density polyethylene)]
- PC / PE / EVA Triblends with 1 to 5% EVA
- PC / PMMA blends with 5 to 30% PM A (polymethyl methacrylate) preferred 10-20%)
- PC / TPU blends with 10 to 40% TPU, preferably 20 to 25%).
- SAH styrene-maleic anhydride
- processing aids in the present invention as they improve (e.g., but are not limited to: increasing crystallization rate, increasing impact strength, improving weld line strength, reducing processing shrinkage, etc.).
- plastic mixtures for the frames according to the invention include polyolefin blends, such as PP / BR, PP / EPA, PP / EPDM, PP / PE, PP / PBT, PP / PET, PP / EPDM / CaC0 3 Blends (at 5 to 40%, preferably 7 to 20%).
- polyolefin blends such as PP / BR, PP / EPA, PP / EPDM, PP / PE, PP / PBT, PP / PET, PP / EPDM / CaC0 3 Blends (at 5 to 40%, preferably 7 to 20%).
- step (ii) of the process according to the invention the addition of impact modifiers such as preferably ethylene-propylene rubber (EPR, EPDM), acrylonitrile-butadiene rubber (NBR), styrene-butadiene-styrene copolymer, random (SBR), styrene Butadiene-styrene block copolymer, random (SBS), styrene-ethylene-butylene-styrene (SEBS), methyl-methacrylate-butadiene-styrene copolymer (MBS), acrylic rubber (ACR), ethyl ethylene-vinyl acetate rubber (EVA), ethylene / acrylic acid copolymers (EAA), PE, Melt Processible Rubber (MPR), natural rubber, chlorinated butyl rubber (CBR), polybutadiene rubber (BR), acrylonitrile (chlorinated polyethylene) styrene (ACS), chloride-propylene
- the at least one homopolymer or the at least one copolymer, or the mixture thereof is elastomerically modified.
- at least one elastomer-modifying agent is preferably added to the at least one homopolymer or the at least one copolymer, or the mixture thereof.
- Preferred means for elastomer modification are: ethylene-propylene-diene rubber (EPDM), elastomer / MAH graft copolymers, polyolefin elastomers (ethylene-octene copolymer POE) grafted with MAH (maleic anhydride), MAH grafted styrene butadiene styrene copolymer.
- the MAH share is sufficient preferably from 0.1 to 5%, preferably from 0.3 to 0.7%.
- the proportion of impact modifiers is preferably at least 5%, preferably from 5 to 20%.
- the coupling agent is selected from the group comprising: maleic anhydride, methylmethacrylic acid glycidyl methacrylate, acrylic acid, methacrylic acid, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, styrene-maleic anhydride, dibutyl maleate, maleic acid, styrene-glycidyl methacrylate (SG) and glycidyl phenyl ether.
- the weight fraction of adhesion promoters on the grafted matrix polymer is 0.3 to 20%, preferably 3 to 10%.
- Fla mm protection agents can be roughly divided into phosphorus-free or phosphorus-containing flame retardants.
- Preferred phosphorus-containing flame retardants are: bisphenol A disphenyl phosphate, triphenyl phosphate, tricresyl phosphate,
- RDP oligomeric resorcinol-bis (diphenyl phosphate)
- ammonium polyphosphate red phosphorus
- ammonium polyphosphate trimethyl phosphate
- TMP trimethyl phosphate
- HMP di (polyoxyethylene) hydroxymethylphosphonate
- PIR polyisocyanurate
- Preferred phosphorus-free flame retardants are: magnesium hydroxide, carbonate oligomers, alkali metal organosulfonate, ammonium octamolybdate (AOM), molybdenum oxide, aluminum hydroxide, co-metal oxides (eg MgO / ZnO, MoO 3 / ZnO), barium metaborate, magnesium sulfate heptahydrate, antimony oxide, zinc borate and calcium borate.
- step (ii) of the inventive method of the possible classes of additives namely plasticizers, flame retardants, processing aids and means for elastomer modification
- at least two classes of additives are used, more preferably at least three classes of additives, and particularly preferably all four classes of additives, ie at least one Weichma- tend, at least one flame retardant, at least one processing aid, and at least one means for elastomer modification.
- the addition amount of additives is total (in weight percent) of 0.5 to 40%, preferably 4 to 17%.
- the plastic has a particularly high toughness and elasticity example
- FIG. 1 shows a frame element for an electrochemical cell produced according to the invention by the injection molding process (material: the abovementioned polymer blend of PA6 and PA6.6).
- FIG. 1 also shows the position of the samples in the frame. The upper three samples are transverse to the flow direction and the lower three samples are longitudinal to the flow direction.
- plastic mixture according to the invention is particularly suitable for frame elements in electrochemical energy stores.
- thermogravimetric analysis TGA Only the influence of heat aging was considered. The other influences such as environmental influences, UV light etc. were neglected.
- the TGA was carried out with four different heating rates (5, 10, 15 and 20 K / min) under air with a sample weight of about 10 mg.
- Figure 2 shows the four TGA curves.
- the first is between 300 and 350 ° C
- the second between 400 and 470 ° C.
- the loss is between 40 and 70%.
- the lifetime is calculated from the kinetic equation of the thermal degradation reaction (based on the Arrhenius equation) for different temperatures of use.
- the relationship between temperature and weight loss can be determined. From this, the activation energy can be calculated. This is 10, 617 KJ / mol for the Gn7on ST-V0 polymer blend. With the help of the activation energy, the lifetime of the polymer can be determined at any operating temperature: Service life t f service temperature
- a service life of more than eight years at a temperature of 60 ° C is to be regarded as advantageous for the intended use of the frame elements.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010061865A DE102010061865A1 (en) | 2010-11-24 | 2010-11-24 | Frame for an electrochemical energy storage unit |
PCT/EP2011/070876 WO2012069561A1 (en) | 2010-11-24 | 2011-11-23 | Frame for an electrochemical energy-storage unit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2643134A1 true EP2643134A1 (en) | 2013-10-02 |
Family
ID=45349461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11796932.9A Withdrawn EP2643134A1 (en) | 2010-11-24 | 2011-11-23 | Frame for an electrochemical energy-storage unit |
Country Status (4)
Country | Link |
---|---|
US (1) | US9833959B2 (en) |
EP (1) | EP2643134A1 (en) |
DE (1) | DE102010061865A1 (en) |
WO (1) | WO2012069561A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101500935B1 (en) * | 2012-08-17 | 2015-03-11 | 주식회사 엘지화학 | Battery Module Having Assembly Coupling Structure |
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US8057873B2 (en) * | 2008-04-28 | 2011-11-15 | Sabic Innovative Plastics Ip B.V. | Injection molded article and method for the manufacture thereof |
EP2273162B1 (en) * | 2009-07-06 | 2019-01-09 | Carl Freudenberg KG | Sealing frame for use in a battery |
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-
2010
- 2010-11-24 DE DE102010061865A patent/DE102010061865A1/en not_active Withdrawn
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2011
- 2011-11-23 US US13/989,474 patent/US9833959B2/en active Active
- 2011-11-23 WO PCT/EP2011/070876 patent/WO2012069561A1/en active Application Filing
- 2011-11-23 EP EP11796932.9A patent/EP2643134A1/en not_active Withdrawn
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US9833959B2 (en) | 2017-12-05 |
US20130313754A1 (en) | 2013-11-28 |
WO2012069561A1 (en) | 2012-05-31 |
DE102010061865A1 (en) | 2012-05-24 |
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