Classifications

• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/655—Solid structures for heat exchange or heat conduction
  • H01M10/6554—Rods or plates
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/61—Types of temperature control
  • H01M10/613—Cooling or keeping cold
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
  • H01M10/625—Vehicles
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
  • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
• • 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
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
  • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
  • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
  • H01M50/51—Connection only in series
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
  • H01M50/512—Connection only in parallel
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
  • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
• • 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 invention relates to a battery having a battery housing and a cooling device for controlling the temperature of the battery, wherein the battery has a plurality of parallel and / or serial interconnected by cell connectors individual cells.
• a battery for use in motor vehicles in particular in motor vehicles with a hybrid drive or fuel cell vehicles, a cell block of several electrically connected in series and / or parallel single cells (also called single cells), for example, lithium-ion cells, on.
• single cells also called single cells
• the individual cells must be cooled in order to dissipate the resulting heat loss.
• a cooling device is used, which is thermally connected to the individual cells.
• the cooling device is arranged on a pole side of the individual cells, at which there are electrical pole contacts of the individual cells, which are electrically connected in pairs by cell connectors.
• the cooling device is designed as a flow-through of a coolant cooling tube, which is conductively connected to the individual cells via heat conducting plates arranged between these heat.
• the cooling device is designed as a heat-conducting plate arranged on one pole side of the individual cells, which is used for cooling the single cell is in thermal contact with cell connectors of pole contacts of the single cells.
• the cooling device is designed as a cooling bellows made of a deformable, heat-conducting material.
• the cooling bellows is placed in several folds around the individual cells and can be flowed through by a heat transfer medium via which heat can be discharged from the individual cells.
• US 2005/0174092 A1 discloses a battery whose cooling device comprises a number of cooling channels.
• pole contacts of the individual cells and their electrically connecting cell connectors are arranged in the cooling channels for cooling the individual cells and can be cooled convectively by means of a gas flowing through the cooling channels.
• the cell connectors preferably have cooling fins extending into the cooling channels in order to increase their coolable surface area.
• the cell connectors serve to fix the individual cells, in that they are designed as shims for screw nuts for fastening the pole contacts to walls of the cooling channels.
• the invention is based on the object of specifying a battery with improved cooling of the individual cells.
• the battery with a battery housing comprises a plurality of individual cells interconnected in parallel and / or in series by cell connectors, which are fastened prestressably to a cooling device by means of the cell connectors.
• the individual cells are usually connected in each case via acting on pole contacts forces with the cooling device.
• the invention provides that the individual cells can be fastened to the cooling device by means of a prestressable connection of the form-fitting or force-fittingly arranged on or in pole contacts of the individual cells and thus supported on these cell connectors.
• the individual cells are connected via the tensionable cell connectors to the cooling device, for. B. pressed against an underside of the cooling device.
• the to applied tensile force is introduced via the cell connectors in the individual cells, so that the pole contacts are mechanically relieved.
• the direct contact pressure of the individual cells to the cooling device improves the cooling of the individual cells and the stability of the cell assembly of the individual cells.
• a permanent bias in the press assembly of cooling device and single cells over the life of the battery is effected.
• the cell connectors for a prestressable connection of individual cells and cooling device are elastic, in particular resilient.
• Such a configuration of the biasable connection has the advantage that the bias for each individual cell individually by appropriate tightening the cell connector z. B. can be adjusted by means of a screw. As a result, particularly advantageous production-related differences in the dimensions of the individual cells can be compensated.
• the cell connectors have an omega-shaped or loop-shaped longitudinal section.
• the height of the bias is determined by the distance of the Omegaschenkel the o- or circular omega element and the height of the cavity of the o- or circular omega.
• the cell connectors are arranged on the pole contacts such that they represent an upside-down omega in the longitudinal section of the battery, the Omegaschenkel are attached to the pole contacts of adjacent individual cells and the circular omega element on the front side of the individual cells form and frictionally rests in the assembled state ,
• the height of the cell connector is expediently greater than the height of the pole contacts of the respective individual cell protruding from the cooling device.
• each cell connector is provided with one spring element.
• the cell connector has an additional spring element, which is arranged on the cell connector and aligned in the direction of the end faces of the individual cells.
• the respective, in particular s-shaped spring element form and locks, in particular latching on the relevant cell connector can be arranged and fastened.
• the respective spring element is made of at least electrically insulating material, for. As plastic, formed.
• the respective spring element is at least temperature resistant.
• the cooling device is a thermally conductive in contact with the individual cells in heat conduction. This allows a simple and space-saving design of the battery.
• the cell connectors are in heat-conducting contact with the cooling device designed as a heat-conducting plate.
• the cooling device designed as a heat-conducting plate.
• an electrically insulating heat conducting foil is provided on the cooling device, in particular on the upper side in the direction of the cell connectors.
• the cooling device in particular the heat-conducting plate, expediently has bores and / or cuts for the passage of the pole contacts in the region of the pole contacts of the individual cells.
• the heat-conducting foil also has recesses for the passage of the pole contacts.
• the heat conducting plate may have a channel structure for a coolant flowing through this channel structure.
• the channel structure is connected to an air conditioning or cooling circuit of an air conditioning system of the vehicle, wherein as coolant, for example, cooling air or a refrigerant of the air conditioner flows through the channel structure of the heat conducting, so that via the coolant transferred to the heat transfer plate heat loss of the individual cells from the battery can be derived ,
• the respective individual cell preferably has a honeycomb-shaped sheathing, which likewise allows optimized cooling, in that the honeycomb-shaped sheath is preferably formed from an electrically insulating and particularly good heat-conducting material.
• the battery is preferably a vehicle battery, in particular a battery for a vehicle with hybrid drive or a fuel cell vehicle.
• FIG. 1 schematically shows a perspective view of a series of parallel juxtaposed individual cells, which are frontally fixed by means of omega-shaped cell connectors biased to a cooling device,
• Fig. 2 shows schematically another embodiment of a series of
• FIG. 3 is a schematic longitudinal section of the row of individual cells according to FIG. 1,
• Fig. 4 shows schematically an embodiment of an omega-shaped
• Cell connector in perspective, 5 schematically shows an alternative embodiment of the invention in perspective view with a series of parallel juxtaposed individual cells, which are frontally fixed by means of conventional cell connectors and these can be arranged spring elements biased to a cooling device,
• Fig. 6 shows schematically the row of single cells according to Figure 5 in longitudinal section
• Fig. 7 shows schematically an embodiment of a spring element which can be fastened to a cell connector, in perspective view.
• FIG. 1 schematically shows a perspective view of a row of individual cells 1 arranged parallel next to one another. Several such rows of individual cells 1 can be connected to form a cell network which forms a battery (not shown).
• Adjacent individual cells 1 are electrically connected to one another on the pole side by means of cell connectors 2 in series and / or in parallel.
• each cell connector 2 connects a pole contact 1.1 of a single cell 1 with a pole contact 1.2 of the adjacent single cell 1 electrically conductive with each other.
• a pole contact 1.1 of a single cell 1 with a pole contact 1.2 of the adjacent single cell 1 electrically conductive with each other.
• the individual cells 1 are attached to the cooling end face or pole side to a cooling device 3 prestressed, in particular pressed.
• the individual cells 1 are arranged below the cooling device 3 at this and above this via the pole contacts 1.1, 1.2 electrically connected to each other by means of the cell connector 2.
• the individual cells 1 furthermore each have a honeycomb-shaped heat-conducting cell housing 1.3, through which heat can be conducted to the cooling device 3.
• the pole contacts 1.1, 1.2 of the respective individual cell 1 are led out through the cooling device 3.
• the cooling device 3 is designed as a heat-conducting plate (also called cooling plate).
• the cooling device 3 may be provided with a channel structure 3.1, through which a coolant is feasible, for.
• B. a cooling medium of an air conditioning circuit of an air conditioner.
• a heat-conducting and electrically insulating heat-conducting film 4 may be arranged between the cell connectors 2 and the cooling device 3.
• the heat-conducting foil 4 may alternatively also be formed as a mat.
• the cell connectors 2 are formed elastically. Preferably, these are resilient.
• FIG. 1 shows a possible exemplary embodiment for elastic cell connectors 2.
• These are omega-shaped or looped with lateral Omegaschenkeln 2.1 and a middle circular or o-shaped omega element 2.2 executed.
• the cell connectors 2 are separate individual elements.
• these can also be integrated in a so-called cell connector board, in which, for example, electrical components for cell voltage monitoring and / or cell voltage compensation are integrated.
• the strength of the bias is determined by the distance of the omega leg 2.1 to the o- or circular omega element 2.2 and the height of the cavity of the o- or circular omega 2.2.
• the cell connectors 2 are arranged on the pole contacts 1.1, 1.2 of adjacent individual cells 1 such that they represent an upside-down omega in the longitudinal section of the individual cells 1, whose Omegaschenke! 2.1 are attached to the pole contacts 1.1, 1.2 adjacent individual cells 1 and the circular omega 2.2 on the front side of the adjacent individual cells 1 form-fitting and frictionally applied in the assembled state.
• the individual cells 1 are prestressed attached to the cooling device 3.
• Figure 2 shows another embodiment of a series of single cells 1 in an exploded view.
• a heat-conducting and electrically insulating shaped body 5 is arranged between the cooling device 3 and the individual cells 1.
• the molded body 5 is used for electrical insulation of the pole contacts 1.1 and 1.2 of the respective single cell 1 and has to the pole contacts 1.1, 1.2 corresponding recesses 5.1, 5.2.
• the molded body 5 extends at least partially into recesses 3.2 of the cooling device 3. Through the recesses 5.1, 5.2 and the recess 3.2, the pole contacts are 1.1 and 1.2, as well as usable in these fasteners 6, z. As screws or rivets, out.
• the fastening means 6 in holes 2.3 of the omega link 2.1 of the cell connector 2 and in through holes 4.1 of the heat-conducting 4, in the recess 3.2 of the cooling device 3 and in the recesses 5.1, 5.2 of the molded body 5 set to the respective pole contacts 1.1, 1.2 and screwed or clipped there.
• the pole contacts 1.1, 1.2 corresponding to an internal thread or internal detents.
• FIG. 3 schematically shows the row of individual cells 1 according to FIG. 2 in longitudinal section.
• a first pole contact 1.1 is electrically insulated from the cell housing 1.4 of the respective individual cell 1 by being fastened to a cell housing cover 8 via electrically insulating seals 7.
• a washer 9 is arranged above them, which preferably consists of metal.
• the first pole contact 1.1 is rivet-shaped in a region above the washer 9, so that a bulge 10 extending annularly around the first pole contact 1.1 results, which rests on the washer 9, so that the first pole contact 1.1 is securely held in the cell housing cover 8 ,
• the second pole contact 1.2 is electrically conductively connected to the cell housing 1.4 and in particular the cell housing cover 8.
• the omega-shaped cell connectors 2 have a greater height h than the height of the pole contacts 1.1, 1.2 of the respective individual cell 1 protruding from the cooling device 3.
• the elastic cell connectors 2 are biased so that they compress the cooling device 3 in an advantageous manner against the composite of single cells 1 and thus produce an improved heat-conducting contact between the cooling device 3 and the cell assembly.
• this bias can be supported by the application of a battery cover, not shown, on the top of the cell assembly.
• FIG 4 shows schematically an embodiment of an omega-shaped cell connector 2 in detail in perspective view.
• the cell connector 2 has the central circular omega 2.2, from which the two Omegaschenkel 2.1 side go off on.
• Omegaschenkeln 2.1 holes 2.3 are introduced, the shape of which correspond to the shape of the shank of the fastening means 6 and whose cross-sectional area is greater than the cross-sectional area of the shank of the fastening means 6.
• Figure 5 shows schematically an alternative embodiment of the invention in perspective view with a series of parallel juxtaposed individual cells 1, the pole contacts 1.1, 1.2 frontally by means of conventional cell connectors 2 ', z.
• B. a simple elongated metal sheet, are electrically connected to each other.
• additional spring elements 11 can be arranged on the conventional cell connectors 2 " Embodiment, the cell connector 2 and the spring element 11 may be separate components. Alternatively, these may be formed as a molded part.
• Figure 6 shows schematically the row of single cells 1 according to Figure 5 in longitudinal section and Figure 7 shows schematically an embodiment of such a spring element 1 1, which is fastened to a cell connector 2 ', in perspective view.
• the spring element 11 comprises in longitudinal extent an elastic profile structure 11.1, z. B. an S-shaped profile structure.
• This elastic profile structure 11.1 allows the above-described prestressed connection of the individual cells 1 to the cooling device 3.
• the spring element 11 is formed at least of electrically insulating plastic and preferably made of a heat-conducting material and temperature resistant.

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

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (1)

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• 2008
  • 2008-07-26 DE DE200810034871 patent/DE102008034871A1/de not_active Withdrawn
• 2009
  • 2009-06-27 CN CN2009801267746A patent/CN102089926B/zh not_active Expired - Fee Related
  • 2009-06-27 US US12/991,653 patent/US8962172B2/en not_active Expired - Fee Related
  • 2009-06-27 EP EP09776863A patent/EP2304838A1/de not_active Withdrawn
  • 2009-06-27 WO PCT/EP2009/004660 patent/WO2010012341A1/de active Application Filing
  • 2009-06-27 JP JP2011519051A patent/JP5461549B2/ja not_active Expired - Fee Related

Patent Citations (1)

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