WO2023155958A1 - Système de batterie à électrolyte solide comprenant un support de batterie à électrolyte solide - Google Patents

Système de batterie à électrolyte solide comprenant un support de batterie à électrolyte solide Download PDF

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Publication number
WO2023155958A1
WO2023155958A1 PCT/DE2023/200003 DE2023200003W WO2023155958A1 WO 2023155958 A1 WO2023155958 A1 WO 2023155958A1 DE 2023200003 W DE2023200003 W DE 2023200003W WO 2023155958 A1 WO2023155958 A1 WO 2023155958A1
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WO
WIPO (PCT)
Prior art keywords
solid
state
state accumulator
tension spring
accumulator
Prior art date
Application number
PCT/DE2023/200003
Other languages
German (de)
English (en)
Inventor
Max Konstantin WERHAHN
Lukas KUEHNE
Original Assignee
Contitech Vibration Control Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Contitech Vibration Control Gmbh filed Critical Contitech Vibration Control Gmbh
Publication of WO2023155958A1 publication Critical patent/WO2023155958A1/fr

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Classifications

    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/218—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
    • H01M50/231—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 having a layered structure
    • 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
    • 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
    • H01M50/238—Flexibility or foldability
    • 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
    • H01M50/242—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 adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames

Definitions

  • the present invention relates to a solid-state battery system and a solid-state battery mount for use in such a solid-state battery system.
  • Mobile applications can be, for example, electronic entertainment and communication devices such as mobile phones and vehicles, which can be partially or fully electrically powered.
  • rechargeable electrical energy stores can be used for this purpose, which can also be referred to as accumulators.
  • Accumulators are also referred to as secondary batteries and colloquially abbreviated as rechargeable battery.
  • An accumulator is a rechargeable galvanic element that has two electrodes and an electrolyte that can store electrical energy on an electrochemical basis. The respective electrolyte is used to conduct ions between the anode and cathode.
  • accumulators can be manufactured in various sizes and shapes.
  • the accumulators of mobile phones are usually flat and cuboid in shape in order to save as much space as possible. If the space required is less important, accumulators are often designed cylindrically.
  • Cylindrical accumulators and cuboid accumulators are used for many household electrical appliances used. Cylindrical accumulators, in particular, are usually used in groups and connected in series and/or arranged one behind the other in direct contact with one another, for example in remote controls for electronic devices and the like.
  • BEV battery electric vehicles
  • accumulators In battery electric vehicles (BEV for short), which can also be referred to as electric cars, a large number of, in particular cylindrical, accumulators are usually used in combination with one another.
  • the accumulators are often arranged spatially parallel to one another in the floor of the vehicle chassis. The interconnection of the individual accumulators can take place depending on the application or depending on the manufacturer.
  • the main difference between the accumulators is the technology used to store the electrical energy, which essentially depends on the electrolyte used.
  • lithium-ion accumulators which are based on lithium compounds in all three phases of the electrochemical cell, are widespread.
  • Lithium-ion accumulators have a comparatively high specific energy, i.e. a comparatively high energy per unit mass, and are usually used in mobile phones, but also in battery electric vehicles.
  • accumulators based on lead or nickel are also used in battery electric vehicles. What these accumulators have in common is that a liquid electrolyte is used in each case.
  • a disadvantage of accumulators with liquid electrolytes is usually that the accumulators have to be cooled in order to extend the service life of the electrodes. This represents a not inconsiderable additional effort.
  • the required cooling and other devices can account for more than half the volume of a lithium-ion battery, for example. Also should extend the life of the accumulators be avoided that these are completely charged or discharged. Also, most liquid electrolytes are flammable, which may require additional safety devices. Furthermore, the liquid electrolyte can leak if damaged, which can also lead to additional safety measures. A further safety risk can arise in the case of accumulators with liquid electrolytes due to very low or very high ambient temperatures, since the liquid electrolytes can then freeze or boil.
  • accumulators with an electrolyte made of solid material are known, which can also be referred to as solid-state accumulators. Due to the solid materials of the electrolytes, they cannot leak if damaged, which can increase the safety of the use of solid-state accumulators or corresponding additional safety measures can be dispensed with. Also, the solid materials of the electrolytes are usually non-flammable. Furthermore, solid-state accumulators usually have a longer service life than accumulators with liquid electrolytes and are easier to store. Solid state accumulators can also be miniaturized more easily and can in particular be manufactured in the form of a thin layer. Furthermore, solid state accumulators usually show no safety problems with temperature fluctuations and no abrupt changes in their performance.
  • solid-state accumulators or their anodes undergo a significant change in size during charging and discharging, for example 20% can occur.
  • the change in size can correspondingly occur particularly in an elongated extension direction of the solid-state battery, ie for example in the case of cylindrical solid-state batteries in the direction of the longitudinal axis, in which the electrodes also lie opposite one another.
  • This change in size or this change in length between the charged and the discharged or uncharged state of the solid-state battery can also be referred to as “breathing”.
  • a further disadvantage is that solid-state accumulators have to be compressed with a comparatively high pressure of more than approx. 10 bar, in particular between approx. 10 bar and approx can lead to better contact between the solid particles and thereby increase the electrical conductivity.
  • this pressure is usually exerted in the elongate direction of extent, ie for example in the direction of the longitudinal axis in the case of cylindrical solid state accumulators.
  • An object of the present invention is to improve the possible uses of solid state accumulators. This should be as simple, robust, versatile, inexpensive and/or space-saving as possible.
  • the object is achieved according to the invention by a solid-state battery system and by a solid-state battery holder having the features of the independent patent claims.
  • Advantageous developments are described in the dependent claims.
  • the present invention thus relates to a solid-state accumulator system with at least one solid-state accumulator with a preferred direction of change in size and with at least one solid-state accumulator holder which is designed to counteract the change in size of the solid-state accumulator in the direction of change in size by means of at least one tension spring.
  • the present invention is based on the knowledge that, as described at the outset, solid-state accumulators or their anodes tend in principle to decrease when discharging the stored electrical charge and to increase again when charging, which is also referred to as "breathing" of the solid-state accumulator can.
  • This occurs essentially in one direction in space which can thus be referred to as the preferred direction of change in size, since the greatest change in size occurs in this direction in space due to the "breathing" of the solid-state accumulator or its accumulator cell or its accumulator cells.
  • This change in size has an effect in particular in the direction of the longitudinal extent of the solid-state battery, so that the direction of the longitudinal extent can also be referred to as the preferred direction of change in size.
  • a solid-state battery holder is proposed according to the invention, which can counteract this change in size by means of at least one tension spring.
  • the tension spring can be moved in the preferred direction of size change, ie completely or largely, with the minimum size of the solid-state battery discharged state, be at least almost or completely powerless or rest loosely on or be held on the solid-state battery and counteract the resulting enlargement of the solid-state battery in the preferred direction of size change by means of the tension spring force during charging, so that the solid-state battery is on the one hand along the direction of the preferred size change can also be held while "breathing", but can still expand in the preferred direction of size change due to the principle.
  • a secure hold of the solid state battery can be achieved despite the "breathing".
  • the tension spring of the solid state battery mount exerts a force on the solid state battery in the opposite direction to its preferred direction of size change.
  • a change in size of the solid-state battery or its anode in the preferred direction of size change during charging acts on the solid-state battery holder or its at least one tension spring in such a way that the solid-state battery expanding in the preferred direction of size change pulls the tension spring apart against its spring force, so that the Tension spring counteracts this pulling apart by means of its spring force.
  • the tension spring can be designed accordingly for this purpose.
  • mechanical and elastomeric tension springs are available for this purpose.
  • a tension spring alone can be used for implementation.
  • at least one tension spring can be used in combination with at least one rigid or movable element in order to achieve the desired effect.
  • the use of a tension spring can promote the achievement of a compact arrangement or a compact construction of the solid-state battery holder.
  • the tension spring can be arranged parallel to the solid-state battery, acting in the preferred direction of size change of the solid-state battery.
  • an elastomeric tension spring can have a degressive course of the characteristic curve of the spring stiffness due to the constriction of the elastomeric material during tensile force-related elongation in the preferred direction of size change, so that the elastomeric tension spring can exert a tensile force that is as constant as possible on the solid-state battery over the entire span of the size change.
  • the solid-state accumulator can be held securely by the solid-state accumulator holder both in the discharged and charged state and during the discharging and charging process. This can occur during the discharging and charging process despite the significant change in size in the preferred direction of change in size.
  • the solid-state accumulator holder By means of the solid-state accumulator holder, the solid-state accumulator can be connected to a device or to a device and thus be held securely there, which can be fed or operated electrically by means of the solid-state accumulator.
  • the tension spring is also designed to exert a preload on the solid-state battery.
  • This tensile force of the tension spring can be regarded as the prestressing of the tension spring and is preferably at least approximately 10 bar, particularly preferably between approximately 10 bar and approximately 30 bar.
  • the solid-state battery or its anode, cathode and electrolyte can be contracted in order to increase efficiency, since the pressure exerted can lead to better contact between the solid particles and thereby increase the electrical conductivity.
  • the tension spring has an elastomeric material, preferably consists of an elastomeric material.
  • This can represent a particularly simple, inexpensive, space-saving, long-lasting and/or easily adaptable possibility of implementation.
  • the enlargement of the solid-state accumulator or its anode in the preferred direction of size change during the charging process against the tensile force of the elastomeric tension spring can lead to a constriction of the tension spring perpendicular to the preferred direction of size change, whereby a degressive course of the characteristic curve of the spring stiffness of the elastomeric tension spring can be generated.
  • This can be advantageous in that over the entire span of the Size change as constant a tensile force as possible can be exerted by the elastomeric tension spring on the solid-state accumulator.
  • the elastomeric material is an ethylene-propylene-diene rubber, a natural rubber or silicone. This can represent particularly simple, inexpensive and/or long-lasting options for implementation.
  • the elastomeric tension spring encloses the solid-state battery at least in sections, preferably completely. This can be endlessly closed or wound, preferably in multiple layers. In any case, a compact implementation can be made possible in this way.
  • the closed elastomeric tension spring can be assembled around the solid-state accumulator in such a way that the elastomeric tension spring is manufactured or provided in an endlessly closed manner and then sufficiently stretched against its tensile force to move the solid-state accumulator within the endlessly closed elastomeric To position the tension spring and then to reduce the elongation of the endlessly closed elastomeric tension spring until the endlessly closed elastomeric tension spring rests on the solid-state accumulator.
  • the stretching can take place in particular by exerting tensile forces on the endlessly closed elastomeric tension spring in such a way that the solid-state accumulator can be positioned in the interior space of the endlessly closed elastomeric tension spring that has been expanded by stretching.
  • These tensile forces can be exerted on the endlessly closed elastomeric tension spring, for example, in that the endlessly closed elastomeric tension spring is sucked in from the outside by means of a vacuum and then pulled apart or stretched.
  • pulling points such as tabs, hooks, eyes and the like can be removed non-destructively or formed in one piece, ie integrally, on the endlessly closed elastomeric tension spring in order to be able to pull or stretch the endlessly closed elastomeric tension spring by means of a mechanical connection.
  • this preload can be exerted on the solid-state accumulator during assembly by separate clamping or pressure means until the endlessly closed elastomeric tension spring or the endlessly closed elastomeric tension springs are positioned or .
  • Any contact required for this purpose by the tensioning or pressure means preferably with the two outer surfaces of the solid-state accumulator in the preferred direction of size change, can preferably take place at the edge, in order to move the tensioning or pressure means, if necessary after the endlessly closed elastomeric tension spring has been installed, under the endlessly closed elastomeric tension spring - or to be able to pull it out.
  • a plurality of endlessly closed elastomeric tension springs are arranged parallel to one another and together endlessly enclose the solid-state accumulator at least in sections, preferably completely.
  • each elastomeric tension spring is closed endlessly and several endlessly closed elastomeric tension springs are arranged next to one another.
  • Each individual endlessly closed elastomeric tension spring acts on the solid-state accumulator as described above. This can reduce the assembly effort, since only one endlessly closed elastomeric tension spring, which is comparatively small and therefore weaker in terms of its tensile force, has to be stretched and positioned at the same time. This can be done one after the other for all endlessly closed elastomer tension springs.
  • a plurality of endlessly closed elastomeric tension springs are arranged one above the other and enclose the Solid state accumulator together at least in sections, preferably completely, endlessly.
  • This can enable a multi-layer implementation, as a result of which the scope for design can be increased.
  • several layers of endlessly closed elastomeric tension springs can be arranged in the middle of the solid-state battery or its battery cell in order to counteract sagging.
  • this can simplify the assembly of the endlessly closed elastomeric tension springs, as described above, since the tensile force per endlessly closed elastomeric tension spring can be further reduced and the resulting common tensile force can nevertheless be achieved in the interaction of all endlessly closed elastomeric tension springs. This can also be done by winding multiple open elastomeric tension springs.
  • the elastomeric tension spring encloses the solid-state accumulator at least in sections, preferably completely, and/or at least in one layer, preferably in multiple layers, when wound.
  • This can represent an alternative implementation, during the assembly of which the stretching of an endlessly closed elastomeric tension spring, as described above, can be avoided. In this case, too, any prestressing that may be required can be exerted during assembly as described above.
  • the solid-state accumulator is surrounded by the elastomeric tension spring in an arc, preferably semi-circularly, in the preferred direction of size change.
  • the endlessly closed elastomeric tension spring and/or the solid-state accumulator can be correspondingly shaped at the edge. This can bring about a more even flow of force within the material of the elastomeric tension spring, which can have a positive effect on the longevity of the elastomeric tension spring.
  • the solid-state accumulator is enclosed in the preferred direction of size change over a surface perpendicular to the preferred direction of size change by the elastomeric tension spring and is preferably curved outwards, preferably semicircular.
  • This can enable a corresponding design of the contact surface of the solid-state accumulator in relation to the elastomeric tension spring, as is customary, for example, in the case of cuboid and cylindrical solid-state accumulators.
  • the solid-state accumulator holder according to the invention can be used with such known solid-state accumulators or those that are easy to produce, without having to structurally change the solid-state accumulators or adapt them to the elastomeric tension spring.
  • At least one pair of elastomeric tension springs is arranged parallel to the solid-state battery along the preferred direction of size change and is connected to a mounting element at the open end in the preferred direction of size change, with the elastomeric tension springs and the mounting elements endlessly supporting the solid-state battery at least in sections, preferably completely enclose.
  • the holding elements can be rigid, for example made of metal. In any case, this may represent an alternative implementation of the present invention, as previously mentioned.
  • the two open-ended elastomeric tension springs can jointly exert their tensile force on the two mounting elements, which in turn enclose the solid-state accumulator at the edge in such a way that the properties described above can also be implemented in this way.
  • the holding elements or at least one of the holding elements can also have traction points such as, for example, lugs, hooks, eyelets and the like, as already described above.
  • the open ends of the elastomeric tension springs are connected to the holding elements in a materially, non-positively and/or form-fitting manner.
  • this can preferably be done by means of vulcanization before assembly of the solid-state accumulator. In any case, this can result in a durable connection in order to be able to implement the properties and advantages described above.
  • the solid state accumulator is surrounded by the holding elements in the preferred direction of size change over a surface perpendicular to the preferred direction of size change.
  • the solid state accumulator mount preferably the elastomeric tension spring and/or the mounts, has at least one pair of traction points which are designed to widen the solid state accumulator mount by pulling. This can also enable the specific implementation of the corresponding properties and advantages already described above in this case.
  • the elastomeric tension spring has at least one tension carrier element in the direction of the preferred direction of size change, the tension carrier element preferably being a reinforcement layer, preferably in the form of a fabric, the reinforcement layer preferably being synthetic fibers and/or natural fibers has, preferably consists of this.
  • the tension carrier element preferably being a reinforcement layer, preferably in the form of a fabric, the reinforcement layer preferably being synthetic fibers and/or natural fibers has, preferably consists of this.
  • the solid-state accumulator system has a plurality of accumulator cells which are arranged in the preferred direction of size change and/or perpendicular to the preferred direction of change of size, the solid-state accumulator holder being designed to counteract the change in size of all accumulator cells in the direction of size change by means of at least one tension spring.
  • the invention also relates to a solid state battery mount for use in a solid state battery system as described above.
  • a solid-state battery holder can be made available in order to be able to implement a solid-state battery system according to the invention as described above.
  • FIG. 1-15 shows perspective schematic representations of different solid-state accumulator systems according to the invention, each with a solid-state accumulator holder according to the invention.
  • the above figures are described in Cartesian coordinates with a longitudinal direction X, a transverse direction Y perpendicular to the longitudinal direction X, and a vertical direction Z perpendicular to both the longitudinal direction X and the transverse direction Y.
  • the longitudinal direction X can also be defined as depth X
  • the transverse direction Y also as width Y and the vertical direction Z as well be referred to as height Z.
  • the longitudinal direction X and the transverse direction Y together form the horizontal, X, Y, which can also be referred to as the horizontal plane X, Y.
  • the longitudinal direction X, the transverse direction Y and the vertical direction Z can also be collectively referred to as spatial directions X, Y, Z or as Cartesian spatial directions X, Y, Z.
  • a solid-state accumulator 1 is always considered, which has at least one accumulator cell 10 in each case.
  • the accumulator cell 10 represents a rechargeable galvanic element, which has two electrodes (not shown), i.e. an anode and a cathode, and an electrolyte (not shown), which can store the electrical energy on an electrochemical basis and the conduction of ions between the electrodes is used.
  • the electrolyte is a solid material.
  • accumulator cells 10 with a solid electrolyte it is known that a significant change in size of, for example, approximately 20% can occur during charging and during discharging. This change in size or this change in length can also be referred to as "breathing".
  • the change in size can occur essentially in a longitudinal extension direction of the accumulator cell 10, which corresponds to the vertical direction Z in the exemplary embodiments under consideration, in which the electrodes also lie opposite one another.
  • the preferred direction of change in size A thus corresponds to the longitudinal extension direction of the accumulator cell 10 and thus to the vertical direction Z.
  • the accumulator cells 10 with a solid electrolyte if the accumulator cells 10 are compressed with a comparatively high pressure of more than approx. 10 bar, in particular between approx. 10 bar and approx. 30 bar, since the pressure exerted leads to better contact between lead to the solid particles of the electrolyte and thereby increase the electrical conductivity can.
  • the direction in which this pressure is exerted corresponds to the longitudinal extension direction of the battery cell 10 and thus to the vertical direction Z or the preferred direction of size change A.
  • FIG. 1 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a first exemplary embodiment.
  • the accumulator cell 10 of the solid-state accumulator 1 is surrounded by a solid-state accumulator mount 2 which has exactly one endlessly closed elastomeric tension spring 20 and a pair of mount elements 21 , 22 .
  • the tension spring 20 can generally also be referred to as a tension spring element 20 .
  • the holding elements 21 , 22 can also be referred to as holding plates 21 , 22 or as end plates 21 , 22 .
  • a tension spring 20 is thus used, which in the first exemplary embodiment under consideration in FIG. 1 is closed endlessly and is made of an elastomeric material such as ethylene-propylene-diene rubber, natural rubber or silicone.
  • a likewise endlessly closed tension carrier element 20c is embedded as a reinforcement layer 20c in the form of a fabric 20c.
  • the fabric 20c can be made of plastic fibers or natural fibers and can transmit tensile forces in the endlessly closed direction of the elastomeric tension spring 20.
  • the two mounting elements 21, 22 are each semicircular and lie with their flat, level side on the upper or lower surface of the battery cell 10, so that one mounting element 21 as the first, upper mounting element 21 and the other, in the vertical Direction Z opposite support member 22 can be referred to as the second, lower support member 22.
  • the accumulator cell 10 is surrounded on both sides in the transverse direction Y by the endlessly closed elastomeric tension spring 20 in the vertical direction Z and the two mounting elements 21, 22 of the solid-state accumulator holder 2 by the endlessly closed elastomeric tension spring 20 in an arc in the transverse direction Y, with the endlessly closed elastomeric Tension spring 20 tensioned on the accumulator cell 10 and on the mounting elements 21, 22 rests. In this way, the endlessly closed tension spring 20 exerts tensile forces on the accumulator cell 10 counter to the preferred direction of size change A.
  • the endlessly closed elastomeric tension spring 20 is dimensioned in relation to the accumulator cell 10 so that the accumulator cell 10 can be held securely in relation to the environment, for example by arranging the solid-state accumulator holder 2 within a housing or frame. Due to the elastic properties of the endlessly closed elastomeric tension spring 20, this hold can also be guaranteed when the accumulator cell 10 "breathes", i.e. shortens in the preferred direction of size change A when discharging and lengthens in the preferred direction of size change A when charging.
  • a sufficiently high tensile force can be exerted on the two mounting elements 21, 22 and transmitted from the two mounting elements 21, 22 to the accumulator cell 10 in order to generate a force or a Pressure of about 10 bar, for example, exert on the accumulator cell 10 to improve the contact between the solid particles of the electrolyte and thus increase the electrical conductivity.
  • the material of the endlessly closed elastomeric tension spring 20 constricts in the longitudinal direction X when the battery cell 10 is charged and thus enlarged in the preferred direction of size change A or in the vertical direction Z, since As a result, the characteristic curve of the spring stiffness of the elastomeric material of the endlessly closed elastomeric tension spring 20 can be reduced, so that a tensile force that is as constant as possible can be exerted by the endlessly closed elastomeric tension spring 20 on the accumulator cell 10 over the entire span of the change in size. Accordingly, the tensile force or the pressure for compressing the solid particles of the electrolyte can be exerted comparatively constantly despite the significant change in size of the accumulator cell 10 or its anode when “breathing”.
  • the solid state accumulator system 1 , 2 can be assembled in such a way that the accumulator cell 10 is provided and held on one side in the longitudinal direction X. Then the first, upper mounting element 21 can be placed on the upper side of the battery cell 10 and the second, lower mounting element 22 can also be held on one side in the longitudinal direction X and applied from below against the lower side of the battery cell 10 .
  • the endlessly closed elastomeric tension spring 20 can now be stretched, which can be done by tensile forces acting from outside, for example by negative pressure. In the expanded state, the endlessly closed elastomeric tension spring 20 can be pushed over the battery cell 10 together with the retaining elements 21 , 22 in the longitudinal direction X from the opposite side. The expansion of the endlessly closed elastomeric tension spring 20 can then be ended in the desired position, so that the solid-state accumulator system 1 , 2 can be created as previously described.
  • FIG. 2 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a second exemplary embodiment.
  • four narrower, endlessly closed elastomeric tension springs 20 together form the solid-state battery holder 2 in the longitudinal direction X, which can simplify assembly with regard to the expansion of the individual endlessly closed elastomeric tension springs 20 .
  • FIG. 3 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a third exemplary embodiment.
  • an elastomeric tension spring 20 is also used, which, however, is open and is applied to the accumulator cell 10 by winding.
  • a material connection between the surface of the accumulator cell 10 and the mounting elements 21, 22 and the inside of the wound elastomeric tension spring 20 can be achieved by means of gluing. This can be done in the longitudinal direction X beyond the edges (not labeled) of the accumulator cell 10 and the mounting elements 21 , 22 and can then be shortened to its dimensions by cutting.
  • FIG. 4 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a fourth exemplary embodiment.
  • two elastomeric tension springs 20 are wound in two layers in order to improve the hold of the solid-state battery holder 2 .
  • the individual plies or layers of the elastomeric tension springs 20 can be glued together. It is advantageous to overlap the individual layers or layers of the elastomeric tension springs 20 in the same winding direction or to apply them in opposite winding directions in order to improve the hold of the individual layers or layers of the elastomeric tension springs 20 to one another. Endlessly closed elastomeric tension springs 20 can also be provided in multiple layers (not shown).
  • FIG. 5 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a fifth exemplary embodiment.
  • an endlessly closed elastomeric tension spring 20 is used, which has eight tension points 20a in the form of tabs 20a or eyelets 20a. which are sort of arranged “in the corners”.
  • tensile forces can be exerted on the endlessly closed elastomeric tension spring 20 via the tension points 20a.
  • FIG. 6 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a sixth exemplary embodiment.
  • the support members 21, 22 are formed flat with a rectangular cross section.
  • the corresponding areas of the endlessly closed elastomeric tension spring 20 are solid in order to continue to achieve a force-transmitting connection between the endlessly closed elastomeric tension spring 20 and the two mounting elements 21 , 22 .
  • FIG. 7 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to a seventh exemplary embodiment.
  • the rectangular mounting elements 21, 22 extend in the transverse direction Y beyond the sides of the battery cell 10 and are each bonded there, e.g. by vulcanization, with two rectangular elastomeric tension springs 20, which run laterally on the battery cell 10 or laterally applied to the battery cell 10. Both elastomeric tension springs 20 have a tension carrier element 20c.
  • FIG. 8 shows a schematic illustration of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to an eighth exemplary embodiment.
  • a form-fitting connection between the two mounting elements 21, 22 and the two elastomeric tension springs 10 is achieved in that the two edges (not labeled) of the two elastomeric tension springs 10 each have an embedded support element 20b in the form of a rod-shaped traverse 20b and in the longitudinal direction X interrupted, ie in two parts, are formed.
  • the two mounting elements 21, 22 each enclose the exposed support element 20b by means of hooks 21a, 22a, so that the tensile forces of the two divided elastomeric tension springs 10 via the two mounting elements 21, 22 as previously described the accumulator cell 20 can be transferred.
  • FIG. 9 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a ninth exemplary embodiment.
  • two accumulator cells 10 of the solid-state accumulator 1 arranged parallel to one another in the horizontal X, Y are jointly accommodated by the solid-state accumulator holder 2 as described above.
  • one of three elastomer tension springs 20 is arranged in the transverse direction Y between the two accumulator cells 10 . All three elastomeric tension springs 20 are connected in the vertical direction Z to the two mounting elements 21, 22, which enclose both accumulator cells 10 in the vertical direction Z, as described above.
  • FIG. 10 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a tenth exemplary embodiment.
  • This design corresponds to the previous ninth exemplary embodiment of FIG. 9, with the difference that a pair of holding elements 21, 22 is used per accumulator cell 10, which are spaced apart in the transverse direction Y from the middle elastomeric tension spring 20.
  • the material connection of the elastomeric tension springs 20 to the mounting elements 21, 22 takes place at their edges, i.e. both in the vertical direction Z and in the transverse direction Y.
  • FIG. 10 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a tenth exemplary embodiment.
  • This design corresponds to the previous ninth exemplary embodiment of FIG. 9, with the difference that a pair of holding elements 21, 22 is used per accumulator cell 10, which are spaced
  • FIG. 11 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to an eleventh exemplary embodiment.
  • two accumulator cells 10 are arranged directly next to each other in the transverse direction Y and are jointly enclosed by the solid-state accumulator mount 2 by means of a pair of elastomeric tension springs 20 and a pair of mounting elements 21 , 22 .
  • FIG. 12 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a twelfth exemplary embodiment.
  • This design corresponds to the eleventh exemplary embodiment of Figure 11 with the difference that two battery cells 10 are also arranged one behind the other in the longitudinal direction X, so that a total of four battery cells 10 arranged in the horizontal X, Y can be removed from the solid-state battery holder 2 by means of a pair of elastomer tension springs 20 and a pair of support members 21, 22 are enclosed.
  • FIG. 13 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a thirteenth exemplary embodiment.
  • This design corresponds to the first exemplary embodiment in FIG. 1, with the difference that here two accumulator cells 10 are arranged one above the other in the vertical direction Z and are enclosed together by the endlessly closed elastomeric tension spring 20 .
  • FIG. 14 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a fourteenth exemplary embodiment.
  • This embodiment corresponds to the thirteenth Exemplary embodiment of FIG. 13 with the difference that here the solid state accumulator holder 2 according to the seventh exemplary embodiment is used.
  • FIG. 15 shows a schematic representation of a solid-state accumulator system 1, 2 according to the invention with a solid-state accumulator holder 2 according to the invention according to a fifteenth exemplary embodiment.
  • first upper support members first, upper support plates; first, upper endplate

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un système de batterie à semi-conducteurs (1, 2), comprenant au moins une batterie à électrolyte solide (1) ayant une direction de changement de taille (A) préférée, et au moins un support de batterie à semi-conducteurs (2) qui est conçu pour contrebalancer le changement de taille de la batterie à électrolyte solide (1) dans la direction de changement de taille (A) au moyen d'au moins un ressort de tension (20).
PCT/DE2023/200003 2022-02-15 2023-01-06 Système de batterie à électrolyte solide comprenant un support de batterie à électrolyte solide WO2023155958A1 (fr)

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DE102022201542.8 2022-02-15
DE102022201542.8A DE102022201542A1 (de) 2022-02-15 2022-02-15 Festkörperakkumulatorsystem

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WO2023155958A1 true WO2023155958A1 (fr) 2023-08-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367572A (en) * 1980-06-19 1983-01-11 Zielenski Anthony L Elastic clamping apparatus
DE102009029019A1 (de) * 2009-08-31 2011-03-03 Robert Bosch Gmbh Vorspannkonzept für Lithium-Ionen-Batteriesysteme
WO2020221856A1 (fr) * 2019-05-02 2020-11-05 CrossLink GmbH Module d'impression, en particulier pour des éléments de batterie aux ions de lithium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367572A (en) * 1980-06-19 1983-01-11 Zielenski Anthony L Elastic clamping apparatus
DE102009029019A1 (de) * 2009-08-31 2011-03-03 Robert Bosch Gmbh Vorspannkonzept für Lithium-Ionen-Batteriesysteme
WO2020221856A1 (fr) * 2019-05-02 2020-11-05 CrossLink GmbH Module d'impression, en particulier pour des éléments de batterie aux ions de lithium

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