EP2641287A1 - Composant électrique comportant un dispositif de coupure d'une liaison électrique - Google Patents

Composant électrique comportant un dispositif de coupure d'une liaison électrique

Info

Publication number
EP2641287A1
EP2641287A1 EP11785335.8A EP11785335A EP2641287A1 EP 2641287 A1 EP2641287 A1 EP 2641287A1 EP 11785335 A EP11785335 A EP 11785335A EP 2641287 A1 EP2641287 A1 EP 2641287A1
Authority
EP
European Patent Office
Prior art keywords
cell
line connection
electrical
component according
composite
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Withdrawn
Application number
EP11785335.8A
Other languages
German (de)
English (en)
Inventor
Tim Schaefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Li Tec Battery GmbH
Original Assignee
Li Tec Battery 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 Li Tec Battery GmbH filed Critical Li Tec Battery GmbH
Publication of EP2641287A1 publication Critical patent/EP2641287A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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

Definitions

  • the present invention relates to an electrical component, in particular a galvanic cell or a cell connector for galvanic cells, with a
  • Galvanic cells such as batteries (primary storage) and accumulators
  • lithium-ion batteries are today proposed and used for a variety of applications, including as traction batteries for motor vehicles. To this
  • the present invention relates to an electrical component comprising means for disconnecting an electrical component
  • Line connection characterized in that the device comprises a composite of at least two different materials.
  • composite includes two or more interconnected
  • Periodic table as well as compounds derived therefrom, such as inorganic or organic compounds.
  • the at least two different materials are selected so that they can be reacted with each other, thereby effecting separation of the electrical wiring.
  • the composite is on a portion of
  • Wiring arranged and the materials are selected so that in their reaction thermal energy is released, which causes a melting of the line connection over its entire cross section or a partial cross section.
  • the thermal energy released during the reaction causes the conduction connection to melt over a portion of the cross-section, with the remaining cross-section of the conduction connection melting as the normal working current flows through the conductor portion.
  • Such “nanometer reactive multilayers” may consist of several hundred to several thousand individual layers of 10 - 100 nm thickness each of at least two different materials, in whose chemical compound energy is released (exothermic reaction) stored a defined amount of chemical energy that can be used as a local heat source After ignition by an external energy source, such as an electric spark or a laser pulse, an atomic interdiffusion of the multilayer materials with the release of energy is stimulated a progressive one
  • Reaction front from which a large amount of heat is released in a spatially limited area in a very short time.
  • exothermic solder foils rapidly reacting multilayer films become local
  • the RMS are with total thicknesses up to 100 ⁇ example by
  • material combinations such as Ni / Al or Ti / Al become local achievable temperatures of up to 2000 ° C as well
  • reactive multilayer structure means any composite in which there are at least two different materials in the form of layers which can be reacted with one another. This means that a “reactive multilayer” or “reactive multilayer structure” is composed of reactive multilayer or reactive multilayer.
  • a “reactive multilayer” is understood as meaning a layer composed of a plurality of individual layers whose thickness is preferably in the nanometer range, wherein the multilayer materials upon the occurrence of a well-defined state, such as a certain temperature, or upon supply of a signal, such as a voltage pulse,
  • the initiation of the reaction is also referred to as “igniting" the multilayer, Preferably, the reaction continues without further action until the multilayer materials
  • the structure may be a coating, an independent, possibly self-adhesive
  • a composite of at least two different materials e.g. a reactive multi-layer structure, arranged on a conductor section, wherein a thermal energy released upon reaction of the reactive multilayer, a melting of the
  • the reactive multi-layer structure can be described here e.g. be an exothermic solder foil, as known from the prior art, it according to the
  • Ignition leads to the formation of a progressive reaction front, from which in a very short time a high amount of heat in a spatially limited area is released.
  • Normal working current through the conductor section melts, the thermal energy generated and thus a thermal impairment of adjacent components can be minimized.
  • a normal working current is understood in the context of the invention, a current of a current that under normal working conditions of the electrical component in the
  • Preferred usable at least two different materials in combination are combinations of elemental metals which react to form alloys or metallic glasses; Elements or
  • the composite for example in the form of a reactive multilayer structure, is arranged between two conductor sections and electrically conductive in an unreacted state, wherein the reaction product of the reactive multilayer structure is not electrically conductive.
  • a line isolation such as a solid-state isolator can be realized. The ends of the cable connection remain fixed in space.
  • the composite is in a portion of
  • the one material of the at least two different materials an electrically conductive material such as graphite or graphene. It is further conceivable to select as the material of the other at least two different materials an electrically non-conductive oxygen donor, so that upon reaction of the graphite or graphene with the oxygen donor electrically non-conductive oxides of graphite or graphene arise.
  • the component is also characterized in that the at least two materials are present in the composite in the form of alternating layers.
  • the layers independently have one another
  • the preparation of the composite also in the form of a reactive multilayer structure, can be carried out by known processes, for example, as already known from the "Fraunhofer IWS Annual Report 2008" above.
  • alternating layers of the at least two different materials are applied to a substrate by processes such as rolling, chemical or physical vapor deposition, vacuum deposition, and / or sputter coating.
  • Reactive multi-layer structure designed to react, preferably to ignite, if a given reaction condition, preferably a
  • reaction condition or ignition condition is preferably given by at least one of the states
  • the reaction or ignition is triggered by supplying a current, voltage, temperature, light, sound, UV, laser signal or pulse or other suitable signal.
  • reaction of the at least two can thus be
  • the ignition of the reactive multilayer structure either by appropriate determination of
  • Design parameters are automatically ensured or specifically provoked by control. For example, in the case of a galvanic cell, the
  • Reactive multi-layer structure are designed so that both an overheating of the cell as well as a targeted ignition pulse of a battery management system or a cell logic triggers a reaction of the reactive multilayer structure.
  • the component is a cell connector for electrical connection between galvanic cells, which has a device for contacting with pole terminals of galvanic cells.
  • a galvanic cell can be understood to mean any device which is also designed and set up to emit electrical energy. It may, in particular, but not only, be one
  • a pole connection is understood to mean a region which also enables an exchange of electrical energy from outside the cell with the active part.
  • Such pole terminals may be, in particular, but not limited to, plate, pin, pinch or button-shaped conductor regions connected to the interior of the galvanic cell.
  • plate-shaped pole terminals which are led through a cell housing are also referred to as current conductors.
  • Cell connector is understood in the context of the invention, a component which connects a pole terminal of a galvanic cell with a pole terminal of another cell.
  • a means for contacting is in the sense of Invention understood each component, which allows a reliable electrical connection with a Polan gleich.
  • Such devices may be, for example, but not limited to, sections having the form of plugs, clips, sleeves, lugs or the like, or having shape features which, together with screws, rivets or other fasteners, allow attachment to the pole terminal, depending on the design of the pole terminal , If a cell connector one
  • an effective external protection circuit can be realized which reliably separates one cell or group of cells from another cell or group of cells. A change to the cell design is not required.
  • the component is a galvanic cell, wherein the means for separating is associated with one or more sections for conducting electrical current from and / or to an active part of the galvanic cell.
  • An active part is understood to be that part of the cell within which as well
  • the active part preferably comprises film layers of electrochemically active materials (electrodes), conductive materials
  • a film is understood to mean a thin semifinished product which is produced from a metal and / or a plastic (for example polyimide or the like).
  • the film can serve as a carrier (substrate) for a material having desired electrical and / or chemical properties or be made of the material with the properties mentioned itself.
  • Electrochemically active materials broadly refer to materials that also participate in an electrochemical reaction in the active part.
  • Under collector materials are understood in the broadest sense materials which are also suitable for collecting and conducting electrical charges and with respective electrode areas are connected.
  • a collector foil may be, for example, but not limited to, a conductor foil, in particular metal foil, or a plastic foil coated with a conductor material, in particular metal.
  • Separator materials are broadly understood to mean materials that exist between an anode region (negatively charged region) and a
  • Cathode area (positively charged area) of a galvanic cell can be arranged to separate them.
  • a separator material is for
  • the separator material preferably contains an organic, in particular polymeric, at least partially permeable base material such as PET, preferably in the form of a nonwoven web, and an inorganic, in particular ceramic material such as zirconium oxide, preferably in particles whose largest
  • Diameter preferably does not exceed 100 nm.
  • the inorganic material corresponds to that of a film material sold under the trade name Separion.
  • the inorganic material may also be another suitable ceramic in preferred modifications
  • Be compound in particular from the group of oxides, phosphates, sulfates, titanates, silicates, aluminosilicates at least one of the elements Zr, Al, Li.
  • the separator material may be any electrolyte conducting electrolyte.
  • the means for separating is associated with one or more portions for conducting electrical current from and / or to an active part of the galvanic cell, an effective external protection circuit can be realized which reliably removes one cell or group of cells from another cell or cell separating another group of cells.
  • Protection circuitry may be inseparably connected to the cell as part of the cell design, thus increasing the degree of integration.
  • the device for separating preferably has one
  • a reactive multilayer structure formed on a connecting portion between a collector portion of an active part of the cell and a pole portion of the cell or between contacting portions for contacting with a cell Collector section of an active part of the cell on the one hand and with a
  • a collector section is understood to mean a section of a collector region which is preferably led out of the active part for contacting.
  • the collector region may be a collector foil as described above.
  • a housing is also understood as meaning a gas-tight, vapor-tight and liquid-tight envelope which accommodates at least the active part and surrounds it on all sides.
  • An enclosure may particularly, but not exclusively, be a film structure (coffeebag or pouch cell or the like) or a frame structure (frame flat cell or the like) or a box structure
  • a pole section is understood to be a section of a conductor structure arranged within the cell, which also enables an exchange of electrical energy from outside the cell with the active part.
  • a pole section may comprise a section of a conductor led through the cell housing or part of a cell housing, in particular an inner side of a (a pole section), which is located inside the cell.
  • the means for separating comprises a reactive multilayer structure disposed on at least one current conductor inside or outside a cell enclosure.
  • the means for separating comprises a reactive multilayer structure disposed on at least one current conductor inside or outside a cell enclosure.
  • a device for separating alternatively a reactive multilayer structure which is arranged on at least one Ableitfahne a collector foil within a cell housing.
  • a device, in particular an electrical line, for supplying an ignition pulse from the outside to the device for separating or to the reactive multilayer structure is provided.
  • the electrical line can also be part of a ladder section on which the
  • Reactive multilayer structure is arranged. With such a device for supplying an ignition pulse from the outside is a targeted ignition of the
  • a device in particular a preferably externally controllable switching device, is provided for short-circuiting the cell or a part of the cell and for conducting a short-circuit current to the device for disconnecting.
  • Short-circuit current is generally higher than a normal working current on which the galvanic cell is designed.
  • a short circuit also often causes a destruction of a galvanic cell.
  • this current is suitable for igniting the reactive multi-layer structure, whereupon both the short circuit and the current flow to and from the cell are interrupted.
  • ignition of the reactive multilayer structure is triggered by a cell management system or a battery management system that manages a plurality of galvanic cells.
  • a device is preferably provided for detecting state parameters of the cell and for signaling the state parameters to the cell management system and / or the battery management system. It is thus also possible to monitor state parameters of the cell and other components of the operating environment of the cell, and to monitor the cell or a group of cells or a portion of a cell if necessary by means of the ignition of the cells
  • FIG. 1 a plan view of a galvanic cell with Ableitfahen, wherein an enclosure for ease of illustration is omitted, according to an embodiment of the present invention
  • FIG. 1 a longitudinal sectional view of the cell of Figure 1 along a line II-II in Fig. 1.
  • a plan view corresponding to Figure 1 of a galvanic cell according to another embodiment of the present invention a plan view corresponding to Figure 1 of a galvanic cell according to another embodiment of the present invention.
  • a plan view of a galvanic cell according to another embodiment of the present invention a plan view of a galvanic cell with control unit according to another embodiment of the present invention; a spatial representation of an external structure of a galvanic cell according to another embodiment of the present invention; a plan view of an upper side of a cell of Fig. 8 in a variant embodiment; a side view of an edge of the cell of Fig. 8 in
  • FIG. 9 a longitudinal sectional view of the galvanic cell of Figure 8 along a line Xl-Xl in Fig. 9.
  • a longitudinal sectional view of a galvanic cell according to another embodiment of the present invention an enlarged horizontal sectional view of an end portion of the cell of FIG. 12 along a through a
  • Embodiment of the present invention a partially sectioned side view of an arrangement of two cells with a cell connector according to another
  • Embodiment of the present invention and a sectional plan view of the arrangement of Fig. 17 along a line XVIII-XVIII. It is understood that the representations in the figures are schematic and are limited to the representation of the features useful for the understanding of the invention. It should also be pointed out that the dimensions and proportions shown in the figures are due solely to the clarity of the representation and are in no way to be understood as limiting, unless the description makes otherwise. In particular, material thicknesses are often shown greatly exaggerated in the figures.
  • an embodiment of the present invention will be described with reference to FIG.
  • a galvanic cell 2 has an active part 4, whose internal structure is not shown in detail.
  • the active part 4 is a packet-like, stacked or wound arrangement of preferably coated films with electrochemical properties.
  • the films and / or layers alternately form anode regions, separator regions and cathode regions which are responsible for the recording, conversion, storage and delivery of electrical
  • collector areas which are respectively connected to anode and cathode areas and the derivative or supply line
  • Foil assemblies for forming the active part of a galvanic cell are known.
  • the current collecting regions are led out of the actual foil package as so-called discharge lugs 6, 8 and, separated after their assignment to the cathode or anode regions,
  • An enclosure may be a cladding film, a frame structure, a box structure or the like and forms a mechanical
  • Electromagnetically shielding structure So-called current conductors (not shown in detail) are connected within the enclosure with the Ableitfahnen 6, 8 and through the enclosure, such as a weld of the
  • current conductors may be directly connected to collector regions inside the cell, or may be conductive tabs through the
  • an exothermic solder foil 10 is applied, preferably glued.
  • the exothermic solder foil 10 is formed with nanometer reactive multilayers. It serves as a controlled energy storage, which can be ignited by one or more influences such as temperature, current, voltage, a laser pulse or others or ignites automatically and then gives off locally and briefly high thermal energy.
  • Such solder foils 0 are conventionally used e.g. used to at
  • the solder foil 10 is designed so that it ignites at a defined overcharge of the film package 4 (ignition pulse) and emits a thermal energy, which
  • Ableitfahnen 8 melts through. This interrupts the flow of current into the cell.
  • An ignition pulse can also be input specifically from the outside, for example by a current or voltage pulse. Thereby, e.g. a cell is switched out of the network.
  • the solder foil 10 thus serves as a multi-layer active fuse.
  • the exothermic solder foil 10 is disposed on the uppermost one of the solder tails 8 in a region where a plurality of solder tails 8 are gathered in the thickness direction.
  • the solder foil 10 is a
  • Reactive multilayer structure in the sense of the invention. It is designed with regard to their energy output so that in response all Lötfahnen 8
  • solder foil 10 is provided on both Ableitfahnen 6, 8.
  • the energy output is such that upon reaction only some of the solder tails 8 are melted through, with the common material thickness of the remaining solder tails 8 then no longer sufficient to be able to conduct the cell current unscathed, so that the remaining solder tails 8 alone melt through ,
  • a nanometer reactive multilayer is vapor-deposited directly on one or both discharge lugs 6, 8 or otherwise deposited there.
  • the directly applied reactive multilayer of this modification is also a reactive multilayer structure in the sense of the invention.
  • Fig. 3 shows another embodiment of the present invention.
  • Fig. 3 in Fig. 2 marked by a dotted line III area shown enlarged as a detail.
  • Embodiment According to the illustration in FIG. 3, a plurality of discharge lugs 8 protrude out of the film stack of the active part 4, which is shown only schematically. In a region before the solder tails 8 in the thickness direction
  • each Lötfahne 8 carries an exothermic solder foil 10. This is in terms of their energy output designed so that upon reaction, the respective Lötfahne. 8 is melted through without affecting other Lötfahen 8 or ignite other solder sheets 10.
  • Embodiment is also a reactive multilayer structure according to the invention.
  • Multi-functional battery backup is installed in the inner Kunststofftechnikssegment before or between the sheet contacting.
  • Fig. 4 shows a view corresponding to the plan view of Fig. 1, another embodiment of the present invention.
  • This embodiment is a modification of the first or second embodiment. While in those of the ignition pulse for the solder foil 0 is preferably supplied via the Ableitfahne 8, the solder foil 10 is connected to a feed line 12 in the present embodiment. Via the feed line 12, an ignition pulse for the solder foil 10 via a control unit (not shown in detail) can be fed.
  • the supply line 12 may be part of the Ableitfahne 8 or the solder foil 10. Alternatively, it can also be an independent conductor piece, which is subsequently connected to the discharge lug 8 or the soldering foil 10. If, as in the exemplary embodiment shown in FIG. 3, each discharge lug carries a soldering foil 10 and is connected to its own supply line 12, the individual solder foils 10 can be controlled individually (ie, ignited) via the (not shown) control device and the associated discharge lugs 8 to be interrupted.
  • Fig. 5 shows in a representation corresponding to the plan view of Fig. 1, a further embodiment of the present invention.
  • This embodiment is a modification of one of the embodiments shown in FIGS. 1, 2 or 4 shown embodiments.
  • a solder foil 10 which ignites to a predetermined ignition pulse and the
  • a switching network (here, for example, a blocking transistor circuit) 14 is provided by
  • Connecting lines 16, 18 is connected to the Ableitfahen 6, 8.
  • the connecting line 18 opens into the Ableitfahne 8 where the solder foil 10 is arranged.
  • the switching network 14 with a control device (not shown in detail) connectable.
  • the Ableitfahnen 6, 8 are separated from each other.
  • the switching network 14 establishes a conductive connection between the discharge lugs 6, 8.
  • the short-circuit current is sufficient to ignite the solder foil 10, thus acting as ignition pulse for the solder foil 10.
  • the connecting lines 16, 18 may each be part of the Ableitfahen 6 or 8 or the solder foil 10. Alternatively, they can also be independent conductor pieces, which can be retrofitted with the discharge lug 6 or 8 or the solder foil 10
  • Fig. 6 is a representation corresponding to the plan view of Fig. 1, a galvanic cell 2 as a further embodiment of the present invention.
  • an enclosure 22 of the cell 2 is shown, and located within the housing 22 parts of the cell 10 are shown in dashed lines.
  • the housing 22 is a film structure, which encloses the active part 4 together with Ableitfahnen 6, 8.
  • the housing 22 is evacuated and protects the cell 2 from external influences as well as from the
  • an exothermic solder foil 10 is disposed outside of the cell housing 22 on the current collector 26.
  • the solder foil 10 is designed such that the thermal energy released when it is ignited completely melts the current conductor 26 or at least melts so far that the cell current causes the further complete thorough melting.
  • the exothermic reaction of the solder foil 10 takes place outside the cell housing 10.
  • the interior of the cell 2 is at least largely kept free from heat input by the exothermic reaction.
  • a supply line (not shown in more detail) can also be provided here, via which the soldering foil 10 an ignition pulse can be supplied.
  • a reactive multilayer can be applied directly to the current collector 26.
  • Fig. 7 shows in a representation corresponding to the plan view of Fig. 1, a further embodiment of the present invention.
  • the present embodiment is a modification of the embodiment shown in FIG. 4. As in Fig. 6 is also in Fig. 7 a
  • Housing 22 of the cell 2 is shown, and located within the housing 22 parts of the cell 10 are shown in dashed lines.
  • the Ableitfahne 8 carries a solder foil 10, which ignites to a predetermined ignition pulse and the Ableitfahne 8 destroyed.
  • a current collector 24 is connected to the Ableitfahne 6 and extends through the housing 22 therethrough.
  • Another current collector 26 is connected to the Ableitfahne 8 and extends through the housing 22 therethrough.
  • the solder foil 10 is connected to a feed line 12, which also extends through the housing 22 therethrough.
  • a controller 28 is provided, which is connected to the cell 2.
  • the first current conductor 24 is connected via a first connecting line 30 to the control unit 28, the supply line 12 is connected via a second connecting line 32 to the control unit 28, the second current collector 26 is connected via a third connecting line 34 to the control unit 28.
  • Controller 28 is configured to arrive at a predetermined internal event, such as reaching a predetermined cell current, cell voltage, cell temperature, or other limit
  • Connecting lines 30, 32, 34 may further connection or
  • Signal lines for connection to sensors within cells 2 or a cell assembly may be provided.
  • the controller 28 may be assigned to the cell 2 individually. Alternatively, the controller 28 may be a common controller for a plurality of cells 2.
  • the controller 28 may e.g. Part of a battery management system (BMS) for one or more cells or batteries and be connected for example with crash sensors or the like.
  • BMS battery management system
  • FIG. 8 schematically shows an outer structure of a galvanic cell 100 according to another exemplary embodiment of the present invention in a spatial representation.
  • the galvanic cell 100 is a so-called flat contact cell. It has a flat, approximately cuboid shape.
  • a top 112, a bottom 114, two end faces 116, 118 and two flanks 120, 122 are defined on the cell 00.
  • the upper side 112 and the lower side 114 are arranged at least substantially parallel to each other.
  • each of the end faces 116, 118 and the flanks 120, 122 are arranged at least substantially parallel to each other.
  • the top 112 and the bottom 114 are the sides with the largest surface area in the
  • flat pages 112, 114 Relationship to other pages, and they are also referred to as flat pages 112, 114.
  • the dimensions of the flat sides 112, 114 define a length L and a width W of the cell 110, wherein the length L is greater than the width W, without loss of generality.
  • the distance of the upper side 112 from the lower side 114 defines a thickness T of the cell 10.
  • the end faces 116, 118 and the flanks 120, 122 connect the upper side 112 and the lower side 114 peripherally circumferentially with each other, whereby - again without limiting the generality - the end faces 116, 118 connect the shorter edges of the flat sides 112, 114 with the dimension W (width) and the flanks 120, 122 connect the longer edges of the flat sides 112, 114 with the dimension L (length).
  • the end faces 116, 118 and the flanks 120, 122 are also referred to as narrow sides 116, 118, 120, 122 of the flat contact cell 100.
  • a plane parallel to the flanks 120, 122, which intersects the flat sides 112, 114 in half the width W, defines a
  • the cell 100 has an electrochemically active part, which is not shown in detail in FIG. For the active part of cell 100 this
  • Embodiment basically apply the comments for the first embodiment.
  • the active part of the cell 100 is formed by a film package.
  • a housing or a housing of the film package or of the active part of the cell 100 is formed by an upper shell 124 and a lower shell 126, which are also referred to as half shells 124, 126.
  • the lower shell 126 is significantly higher than the upper shell 124.
  • the lower shell 126 as a trough and the upper shell 124 may be referred to as a lid.
  • This shape is quite exemplary and can be modified with regard to the mechanical, electrical, manufacturing and economic requirements.
  • a seal 128 is arranged at a contact surface between the upper shell 124 and the lower shell 126.
  • the half-shells 124, 126 are of a well-conducting
  • the shape of the half-switches 124, 126 is made by deep drawing.
  • the Ableitfahnen the active part of the cell 100 are each connected to one of the half-shells 124, 126.
  • the half shells 124, 126 in particular with the flat sides 112, 114 defined by them, form a flat
  • the seal 128 has an electrical insulating property and also serves the reliable electrical separation of the poles (half shells 124, 126).
  • a battery can be manufactured by juxtaposing a plurality of cells 100, wherein the flat sides 112, 1 14 touch each other and a
  • areas of the half shells 124, 126 which are not intended to be used for contacting, for example the narrow sides 16, 118, 120, 122, may be coated with an insulating material.
  • FIG. 9 shows a plan view of the upper side 112 of the cell 100
  • FIG. 10 shows a side view of the flank 116 (viewing direction of an arrow). X "in Fig. 9).
  • elevations 124a are formed on the flat side 12 of the upper shell 124, and four elevations 126a are formed on the flat side 14 of the lower shell 126.
  • the elevations 124a, 126a form circular contact portions and jointly define a respective contact plane 130 on the top 112 and a contact plane 132 on the bottom 1 14 of the cell 100.
  • the elevations 124a, 126a thus form well-defined contact surfaces, which of a possible deformation or Warping of the flat sides 1 12, 114 in the operation of the cell 100 are largely independent.
  • Fig. 11 is a longitudinal sectional view showing an internal structure of the cell 100 of this embodiment.
  • the sectional plane in the center plane M of the cell 100 (see Fig. 8 or Fig. 9) in the direction of an arrow "XI" in Fig. 9 runs.
  • the half-shells 124, 126 respectively form one of the end faces 116, 118 of the cell 100.
  • the flanks 120, 122 of the cell 100 are half of lateral edges of the half-shells 124, respectively, as shown in FIG. 126 formed.
  • one of the half-shells 124, 126 may have a lateral edge extending over the entire height of the cell 100, while the other one of the half shells 124, 126 has a lateral edge
  • Semi-switching 124, 126 has the basic shape of an L-shaped bent sheet metal.
  • Ableitfahen 136, 138 of the film package 134 protrude comparatively short on the end faces of the film package 134 addition.
  • On voltage standing contact springs (compression springs) 168 which are made of an elastically resilient and electrically conductive material, sitting on the frontally projecting Ableitfahnen 136, 138 and provide an electrical connection to the front edges 124c, 126c of the half-shells 124, 126 ago.
  • the contact springs 168 each run in scenes 170, which are made of an electrically insulating material and the contact springs 168 against other area of the half-shells 124, 126 isolate.
  • the contact springs 168 also support the foil package 134 in the longitudinal direction and protect it from movements in the housing.
  • the half-shells 124, 126 are made of a metallic, highly conductive material (eg, steel, aluminum, copper, alloys thereof, or the like) and form the poles of the cell 100.
  • Optional bumps (see Figures 9 and 10) on the flat sides 112 114 are not shown in FIG. 11, as are optional dampings between the foil package 134 and the flanks of the cell 100 (ie, the half-shells 124, 126).
  • Fig. 12 shows a concrete embodiment of the cell 100 in one
  • FIG. 13 shows an end region of the cell 100 in an enlarged horizontal sectional view along a plane symbolized by a dot-dash line in FIG. 12
  • a film package 134 of the cell 100 is formed by a film roll, but it may be formed in a design alternative as a film stack or the like.
  • a first collector foil 178 and a second collector foil 182 are wound, which are each coated with electrode layers.
  • Collector foils 178, 182 existing electrode material
  • Front side 1 16 of the cell 100 formed by the lower shell 126 and a second end face 118 of the cell 100 is formed by the upper shell 124.
  • a contact spring 168 made of a conductive material provides an electrical connection between the front inside of the lower shell 126 and the Ableitfahen 136 or between the front inside of the upper shell 126 and the Ableitfahen 138 each by adhesion to pressure.
  • elevations 124a are formed in the upper shell 124 only on the upper side 112 of the cell 100, but no elevations are provided on the lower side 114.
  • the elevations 124a of the cell 100 thus contact the flat side 11 formed by the lower shell 126 of an optionally adjacent cell in one
  • FIG. 13 Stack arrangement of cells 100 directly. The construction of the frictional connection is shown more clearly in FIG. 13.
  • the end face 116 of the cell 100 (the lower shell 126) is shown with the associated portion of the film package 134.
  • the compression spring 168 has a curved shape with two free ends 168a, which are supported on the half-shell 126, and an arcuate, pointing to the end face of the film package 134 center portion 168b. The pressure of the contact spring 168 and the electrical
  • connection is mediated via a contact plate 192, which is arranged between the contact spring 168 and the Ableitfahen 136 of the film package 134.
  • the center portion 168b of the contact spring nestles against the contact plate 192 for a sufficient distance, and the free ends 168a nestle against the half shell 126 a sufficient distance to ensure reliable power transmission.
  • the contact plate 192 has notches 192 a, which point with a tip to the Ableitfahen 136 and penetrate the front end pressure in order to improve the current transfer.
  • an insulation 192b is applied to the contact plate 192, which isolates the contact plate 192 electrically from the half-shells 124, 126.
  • the structure is identical on the other end face (side of Ableitfahen 138).
  • an exothermic soldering foil 110 is applied on the middle part 168b of the contact spring 168 on a side facing the contact plate 192.
  • the exothermic solder foil 110 is formed with nanometer reactive multilayers. This serves as a controlled
  • the solder foil 110 is so for example
  • the solder foil 110 thus serves as a multi-layer active fuse. Insulating packs 104 disposed between the free ends 168a of the contact springs 168 and the contact plate 192 also hold Through-melted contact spring 168, the distance between the contact plate 192 and the half-shells 124, 126 upright.
  • an exothermic solder foil may be applied on a side facing away from the contact plate or may be applied to the contact plate 192 itself; Such an arrangement may, for example, but not only, be helpful if the conductivity of the exothermic solder foil is behind that of the contact plate and / or the
  • the nanometer reactive multilayer may be evaporated or otherwise deposited.
  • the exothermic solder foil 10 is provided on the contact springs 168 of both end faces 116, 118, this can be omitted in a further modification on one of the end faces 116, 118.
  • more than two notches 192a may be provided to further improve the contacting.
  • FIG. 14 shows, in a longitudinal sectional view corresponding to FIG. 12, a galvanic cell 100 according to a further exemplary embodiment of the present invention
  • the half shells 124, 126 are constructed at least substantially identical.
  • the end faces 116, 118 are each formed halfway from the front edges 124c, 126c (and the side edges not visible in the figure).
  • the seal 128 accordingly extends at least substantially circumferentially at half the height in FIG.
  • Thickness direction of the cell 100 is the direction of the cell 100.
  • contact springs 168 are used whose shape corresponds to the previous embodiment.
  • the contact springs 168 each have a curved shape with two free ends (168a, see Fig. 13), which are supported on the housing, and a arcuate, pointing to the front side of the film package 134 center part 168b.
  • the pressure of the contact spring 168 and the electrical connection are mediated via a contact plate 192 which is arranged between the contact spring 168 and the Ableitfahen 136 of the film package 134.
  • edges 124c, 126c of the half-shells 124, 126 are bent inwardly to form doubled edges (edge doubles) 124j, 126j (ie, the edge thickness is twice that Sheet metal position doubled).
  • an insulating strip 106 is arranged on the inside, the thickness of which corresponds at least substantially to a sheet thickness of the half-shells 124, 126 or their front-side edges 124c, 126c.
  • the half-shells 124, 126 are assembled so that the doubled edges 124j, 126j face one edge 124c, 126c with an insulating strip 106, respectively.
  • the free edges of the contact springs 168 each sit in a half on a doubled edge 124j, 126j of the half-shell 124, 126 to be contacted and the other half on an insulating strip 106, which is the contact spring 168 of the non-contacting half-shell 124, 126 electrically isolated on.
  • a half-shell 126, 124 connected to the contact spring 168 and thus with the Ableitfahnen 136, 138 an end face of the film package 134, and the other half-shell 124, 126 is reliably isolated from it.
  • the half-shells 124, 126 or their elevations 124a, 126a provided on the flat sides can be used as poles of the cell 100.
  • the elevations 124a of the upper shell 124 are formed smaller than the elevations 126a of the lower shell 126 to the
  • the cover 108 is made of a resilient, electrically insulating material such as a rubber or silicone material and causes on the one hand further sealing of the cell 100 and on the other hand electrical insulation of portions of the cell 100, which should not serve as poles.
  • An exothermic solder foil 110 is respectively provided on the central part 168 b of the contact springs 168 on the side facing away from the printing plates to a
  • An insulating package (104, see Fig. 13) is not shown in detail in Fig. 14, but may be provided.
  • FIG. 15 shows, in a longitudinal sectional view corresponding to FIG. 12, a galvanic cell 100 according to a further exemplary embodiment of the present invention
  • the upper shell 124 of the cell 100 has an at least substantially plate-like shape and has the
  • Lower shell 126 has an at least substantially trough-shaped form.
  • Contact sections (poles) of the cell 100 are defined by protrusions 124a, 126a formed on the flat sides 112, 114 of the cell 100 (half-shells 124, 126).
  • the upper shell 124 is seated on the edge of the lower shell 126, and the seal 128 is formed circumferentially therebetween.
  • the film stack 134 has frontally opposite Ableitfahnen 136, 138, each with their flat sides on each other.
  • the Ableitfahnen 136 in the region of the end face 116 lie with their flat sides on each other and are insulated by a contact support 140 against the upper shell 124.
  • the Ableitfahnen 136 is disposed an exothermic solder foil 110 having electrically conductive nanometer reactive multilayers.
  • Contact clip or spring 168 is supported against the lower shell 126 and presses from below against the solder foil 110. In this way, an electrical contact between the Ableitfahen 136 and the lower shell 126 is made.
  • the Ableitfahen 138 in the region of the other end face 118 with their flat sides on each other and are insulated by a contact support 140 against the lower shell 126.
  • a contact support 140 against the lower shell 126.
  • an exothermic solder foil 110 is arranged, which has electrically conductive nanometer reactive multilayers.
  • a contact clip or spring 168 is supported against the upper shell 124 and presses from above against the solder foil 110. In this way, an electrical contact between the Ableitfahen 138 and the upper shell 124 is prepared.
  • the solder foil 110 acts as a multi-layer active fuse which, for example, but not only, reacts when the foil stack is overloaded or when an ignition signal is supplied, and at least either the deflector vanes 136, 138 or the contact springs 168 melts.
  • solder foil 110 forms an insulator layer between the contact springs 168 and the Ableitfahen 136, 138 when ignited.
  • Elevations 124a, 126a on the upper shell 124 and the lower shell 126a serve as contact portions (poles) of the cell.
  • the elevations 126a of the lower shell 126 are formed higher than the elevation 124a of the upper shell 124. In this way, the pole position of the cell 100 can be reliably marked.
  • the elevations 124a or 126a can be replaced by depressions, on the one hand to characterize the pole position, on the other hand to prevent a displacement of cells 100 relative to each other, and finally the packing density of cells 100 in one
  • solder foil 1 10 only on one of
  • Fig. 16 shows an arrangement of two galvanic cells 200 with a connector 202 as another embodiment of the present invention.
  • a pole 204 of a first cell 200 is connected to a pole 206 of a second cell 200 through a connector 202.
  • the connector 202 bridges over a free distance (distance d) between the poles 204, 206 and is formed of a highly conductive material (steel, aluminum, copper, alloys thereof or the like).
  • the connector 202 is fastened to the poles 204, 206 by means of one or more connecting elements 208 (screw, rivet or the like).
  • the connector 202 may also be clipped, clamped, plugged, glued, soldered or the like to the poles 204, 206. Furthermore, the connector 202 has a reactive multilayer 210 in the area of the free path.
  • the layers of reactive multilayer 210 Upon firing, the layers of reactive multilayer 210 exothermically react and melt connector 202 so that connector 202 is interrupted in the region of free span d. Thus, the cells 200, 200 are effectively separated from each other.
  • the current conductors 204, 206 are angled and facing each other.
  • the principle of the invention is equally applicable to just projecting current conductors or otherwise
  • FIG. 17 shows an arrangement of two galvanic cells 200 with a connector 202 as a further embodiment of the present invention, wherein the galvanic cells 200 only in the region of the exit of the
  • Fig. 18 is a plan view, cut along a line XVIII-XVIII, of the arrangement of Fig. 17 as viewed in the direction of arrows.
  • a connector 202 for connecting the current conductors 204, 206 has a first terminal part 212, a second terminal part 214, and a reactive nanometer multilayer 210 (hereinafter referred to as multi-element I 1 210).
  • the connecting part 212 is made of a good electrical conductor material and has a plate portion 212a and two spring portions 212b, which are bent back in the direction of the plate portion. A distance between the spring sections 212b and the plate section 212a is dimensioned such that a current conductor 204, 206 can be clamped in between in such a way that the
  • Plate portion 212a is applied to the current conductors 204 and 206 and the spring portions engage around the current conductors 204 and 206 and elastically press against the plate portion 212 a.
  • the connection principle of the connecting part 212 thus corresponds to that of a cable lug.
  • the connecting part 214 is constructed in the same way as the previously described connecting part 212 and has a plate section 214a and two spring sections 214b, to which the above explanations apply accordingly. In the illustrated configuration, the connector 212 is slid onto the current collector 204 of one cell 200, while the connector 214 is slid onto the current collector 206 of the other cell 200. Between the opposite
  • the multilayer 210 is arranged.
  • the layers of the multilayer 210 are formed of good conductor materials.
  • the reaction product forms the multilayer 210 Insulator material, which electrically separates the connecting parts 212, 214 from each other.
  • the multilayer 210 is a reactive multilayer structure in the sense of the invention.
  • one or more strips or a network are formed by respective reactive multilayers on a collector foil of a galvanic cell. As a result, the galvanic cell is divided into segments. The segments work in non-activated reactive multilayers in a conventional manner and form
  • a high-performance battery in sections harmless voltage such as less than 48 V or the like, are disassembled. Also, during operation may be at risk or faulty
  • Sections (segments) of a cell are switched off individually and specifically.
  • a reversibly reactive reactive multilayer is provided. Under a reversible reactive multilayer is a reversible reactive multilayer.
  • Reactive multi-layer that restores an original state at least once after activation.
  • Multi-layering can be done at any suitable one of the aforementioned locations for purposes of active protection of galvanic cells.
  • the reactive multilayers used in this application consist of several hundred to several thousand alternating layers of at least two materials which can react exothermically with one another.
  • the thicknesses of Single layers are in the range of preferably 10-50 nm, with deviations down or up are possible.
  • an activation energy Upon activation of an activation energy, an atomic interdiffusion of the two materials is excited within the nanometer multilayer, resulting in a high heat release within a very short time.
  • Combination layers e.g. laminates
  • Piezoelectric materials e.g. Ceramics, crystals or the like
  • Multifunctional multilayers e.g. tribological properties
  • thermo-sensors which react with each other, and / or conductive polymers as well as sensors (eg thermo-sensors) or in combination with Al and Si0 2 / Ti0 2 multi-layer, Ti, Zr, Sn and Al; Au, Ag
  • Oxoclusters commonly used metals for oxoclusters: Sn, Ti, Zr, Hf, Ce, Nb, Mo, W, V)
  • Binary and tenear oxide aerogels (examples: Ti0 2 / Si0 2 , Al 2 O 3 / Si0 2 ,
  • Layered two-dimensional materials embedded in an organic matrix e.g. Graphite oxide in expanded form, embedded as a nanocomposite in a polyurethane matrix
  • Ableitfahnen can, for example. Connected by soldering and be performed as a current conductor through the enclosure. Also in this case, an active fuse inside or outside the enclosure within the meaning of this application is providable.
  • the electrical component is characterized in that it is a lithium ion battery or a lithium ion secondary battery or comprises a lithium ion battery or a lithium ion secondary battery.
  • Another object of the invention relates to the use of a composite as defined in this disclosure for separating an electrical
  • an internal or external contacting is provided in all embodiments, which is separable by a reversible or irreversible reactive multilayer.
  • reactive multilayer structures may be vapor deposited, deposited, or otherwise deposited directly, or arranged as discrete films or similar structures.
  • exothermic soldering This is to be understood as merely exemplary and does not limit the use of other reactive multilayer structures in any way.

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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)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un composant électrique comprenant un dispositif de coupure d'une liaison électrique, présentant une strcuture multicouche réactive pour obtenir la coupure de la liaison électrique. Le composant électrique peut être une pile galvanique et le dispositif de coupure peut être agencé à l'intérieur ou à l'extérieur de la pile. Le composant électrique peut également être un connecteur de piles. Il est possible de réaliser une coupure rapide et fiable de piles d'un ensemble de plusieurs piles ou de décomposer de façon rapide et fiable des grandes piles en segments.
EP11785335.8A 2010-11-17 2011-11-08 Composant électrique comportant un dispositif de coupure d'une liaison électrique Withdrawn EP2641287A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010051669A DE102010051669A1 (de) 2010-11-17 2010-11-17 Elektrisches Bauteil
PCT/EP2011/005609 WO2012065694A1 (fr) 2010-11-17 2011-11-08 Composant électrique comportant un dispositif de coupure d'une liaison électrique

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EP2641287A1 true EP2641287A1 (fr) 2013-09-25

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US (1) US20130302654A1 (fr)
EP (1) EP2641287A1 (fr)
JP (1) JP2014502406A (fr)
KR (1) KR20140004649A (fr)
CN (1) CN103270623A (fr)
DE (1) DE102010051669A1 (fr)
WO (1) WO2012065694A1 (fr)

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US9005786B2 (en) 2011-10-21 2015-04-14 GM Global Technology Operations LLC Integrated cell voltage sense line fusing
KR101693290B1 (ko) * 2013-04-18 2017-01-05 삼성에스디아이 주식회사 전지 모듈
US9691515B2 (en) * 2013-10-09 2017-06-27 Hamilton Sundstrand Corporation Bus bar assembly comprising a memory metal composition
DE102014202932A1 (de) 2014-02-18 2015-08-20 Robert Bosch Gmbh Schaltvorrichtung für eine Batterie, sowie Batterie mit einer derartigen Schaltvorrichtung
US9741993B1 (en) 2016-01-22 2017-08-22 Medtronic, Inc. Power terminal for implantable devices
AT518161B1 (de) * 2016-02-19 2017-08-15 Avl List Gmbh Batterie
DE102016208419A1 (de) * 2016-05-17 2017-11-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Elektrische Überbrückungseinrichtung zum Überbrücken einer elektrischen Energiequelle oder eines Energieverbrauchers
DE102016007256B4 (de) 2016-06-15 2018-03-08 Audi Ag Gerät für ein Kraftfahrzeug
US11421864B2 (en) 2020-05-18 2022-08-23 SimpliSafe, Inc. Optical devices and mounting for optical devices

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EP1469564B1 (fr) * 2003-04-17 2012-12-05 Autoliv Development AB Borne de batterie pyrotechnique
EP1742280B1 (fr) * 2005-06-27 2014-12-24 Delphi Technologies, Inc. Unité de raccordement pour connecter des composants électriques avec une batterie pour automobile
US8193770B2 (en) * 2007-12-25 2012-06-05 BYD Co. Ltd Battery system for a vehicle having an over-current/over-temperature protective feature
DE102008010971A1 (de) * 2008-02-25 2009-08-27 Robert Bosch Gmbh Schutzsystem für Batteriemodule
DE102009047439B4 (de) * 2009-12-03 2020-01-02 Robert Bosch Gmbh Bauelement für eine Batterieanordnung mit elektrisch trennbarer Leiterbahn, Batterieanordnung und Betriebsverfahren dafür

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JP2014502406A (ja) 2014-01-30
WO2012065694A8 (fr) 2012-08-23
DE102010051669A1 (de) 2012-05-24
US20130302654A1 (en) 2013-11-14
KR20140004649A (ko) 2014-01-13
WO2012065694A1 (fr) 2012-05-24
CN103270623A (zh) 2013-08-28

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