EP2417667A1 - Dispositif accumulateur d'énergie électrique présentant des cellules plates et des corps de refroidissement - Google Patents

Dispositif accumulateur d'énergie électrique présentant des cellules plates et des corps de refroidissement

Info

Publication number
EP2417667A1
EP2417667A1 EP10706546A EP10706546A EP2417667A1 EP 2417667 A1 EP2417667 A1 EP 2417667A1 EP 10706546 A EP10706546 A EP 10706546A EP 10706546 A EP10706546 A EP 10706546A EP 2417667 A1 EP2417667 A1 EP 2417667A1
Authority
EP
European Patent Office
Prior art keywords
storage device
energy storage
electric energy
cells
heat sinks
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Withdrawn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
EP10706546A
Other languages
German (de)
English (en)
Inventor
Claus-Rupert Hohenthanner
Torsten Schmidt
Andreas Gutsch
Jens Meintschel
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 EP2417667A1 publication Critical patent/EP2417667A1/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Withdrawn legal-status Critical Current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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • 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
    • H01M10/6553—Terminals or leads
    • 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
    • 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
    • H01M50/20—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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • 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
    • H01M50/509—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
    • 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 electric energy storage device with flat cells and heat sinks.
  • Electric energy storage cells in the form of flat and rectangular built memory elements.
  • Such electric energy storage cells are e.g. so-called Pouch- or Coffeebag cells, as flat and rectangular built memory cells for electrical energy (battery cells, accumulator cells, capacitors, ...), whose electrochemically active part is surrounded by a foil-like packaging, through which electrical connections (poles) in sheet form, the so-called (current) arresters are guided.
  • the electrical series or parallel connection of the cells is effected by conductive contact elements, which establish the electrical connection between the corresponding current conductors of adjacent cells. It is common, the cells, loosely picked up in a rack or pressed together by a clip or the like, in a stack (also
  • Cell block called
  • Heat generated in the electrochemically active part of the cells is usually dissipated by forced or natural convection. At high However, power losses can lead to high and difficult to control heat development.
  • an electric power storage device comprises: a plurality of flat memory cells for storing and outputting electric power with opposed flat current conductors, a plurality of spacers for maintaining a predetermined distance between the memory cells, and a clamping means for Clamping the cells to form a stack, wherein cells are respectively clamped at their Stromableitern between spacers by means of adhesion by the clamping means, wherein at least some of the spacer elements are formed as a heat sink, and wherein the heat sinks have ribs, which project laterally outwardly from the stack.
  • the current conductors of the cells are each clamped between spacer elements by means of adhesion by the clamping means, a predetermined distance between adjacent cells is maintained, which can be adjusted so that no clamping force is exerted on an electrochemically active part of the cells.
  • This has advantages in terms of reliability and durability of the cells;
  • the flat sides of the cells can thus radiate heat to a heat transfer medium or, if necessary, also absorb it, for example when starting at low temperatures.
  • the heatsinks allow additional heat to be exchanged with the environment via the arresters. This function is effectively supported by the outwardly directed ribs, which also allow targeted guidance or turbulence of the cooling medium.
  • an electrical energy storage device comprises: a plurality of flat memory cells for storing and delivering electrical energy to opposite flat current conductors, a plurality of spacers for maintaining a predetermined distance between the memory cells, and a clamping means for clamping the cells to one another Stack, wherein cells are each clamped at their Stromab- conductors between spacers by means of adhesion by the clamping means, wherein at least some of the spacer elements are formed as a heat sink, and wherein the heat sinks are thermally connected via a soft, thermally conductive material with the Stromableitern.
  • the heat sinks according to this aspect preferably have ribs.
  • an electric energy storage device comprises: a plurality of flat memory cells for storing and emitting electrical energy with opposed, flat current conductors, a plurality of spacers for maintaining a predetermined distance between the memory cells, and a clamping means for clamping the cells to a stack, wherein cells are respectively clamped at their Stromableitern between spacers by means of adhesion by the clamping means, wherein at least some of the spacer elements are formed as a heat sink, and wherein two heat sinks are arranged between adjacent Stromableitern.
  • the heat sinks according to this aspect preferably have ribs.
  • the division of the heat sinks arranged between the arresters makes it easier to assemble.
  • the feature means that heat sinks are arranged in particular symmetrically on the top and bottom of the arresters. It is therefore possible to pre-assemble the memory cells with the symmetrically arranged heat sinks, such as by gluing with a thermally conductive adhesive or the like.
  • the ribs on the heat sink are preferably offset asymmetrically in the stacking direction away from the current collector. Thereby, the location of the heat transfer with the environment or a cooling medium from the location of heat transfer is removed with the current collector. If, in addition, an intermediate piece is arranged between the two heat sinks, on the one hand a sufficient distance between the ribs of the two
  • Heat sinks are adhered to; On the other hand, it is possible by using an insulating spacer to prevent unwanted contacting of adjacent current conductors on the heatsink, or just make such a contact via a conductive spacer.
  • an electric energy storage device comprises: a plurality of flat memory cells for storing and electrical energy with opposing, flat Stromableitern, a plurality of spacers for maintaining a predetermined distance between the memory cells, and a clamping means for clamping the cells to a stack, wherein cells each at their Stromab- conductors between spacers by adhesion through the clamping means are clamped, wherein at least some of the spacer elements are formed as a heat sink, and wherein the spacer elements have relief holes for weight reduction.
  • the heat sinks according to this aspect preferably have ribs.
  • the relief holes allow a reduction in the total weight of the electric energy storage device.
  • a further reduction in weight is possible in all respects, when the heat sink adjacent pressure surfaces, which exert pressure on the current collector by means of the clamping means, one or more open spaces, which are withdrawn relative to the pressure surfaces in the stacking direction.
  • Such open spaces form additional heat transfer surfaces. They can also facilitate fluid communication between an interior of the stack and the environment, thus improving heat transfer.
  • the relief holes of the fourth aspect are also arranged in the open areas, then the relief holes form additional heat transfer surfaces.
  • the spacer elements can be set up either for electrical through-connection or for electrical insulation in the stacking direction.
  • the functions of the stack structure, so the clamping and mounting of the memory cells, spacing, cooling and interconnection can be realized by one and the same components.
  • the heat sinks may be made of a conductive material, such as a conductive ceramic, a conductive composite, a metallic conductor material, or the like.
  • the invention is particularly advantageously applicable to Li-ion batteries.
  • Fig. 1 is a perspective view of a cell assembly with a E lektroenergy storage cell and two heat sinks as a first
  • FIG. 2 is an exploded perspective view of the cell assembly of FIG.
  • Fig. 3 is an enlarged view of a detail "III" Fig. 1;
  • Fig. 4 is a further enlarged view of the detail "III" in the direction of an arrow "IV” in Fig. 3;
  • Fig. 5 is a representation of a concretization of the arrangement in Fig. 4 in partial section on a line "V" in Fig. 3.
  • Fig. 6 is a perspective view of a cell assembly with two E lektroenergie storage cells and heat sinks and insulators as a second Embodiment of the present invention;
  • Fig. 7 is a view of the cell assembly of Fig. 6 in the direction of an arrow "VII";
  • FIG. 8 shows a heat sink of a third embodiment of the present invention in a perspective view.
  • FIG. 1 is a perspective view of a cell assembly having an electric energy storage cell and two heat sinks as a first embodiment of the present invention
  • Fig. 2 is an exploded perspective view of the cell assembly of Fig. 1
  • Fig. 3 is an enlarged view of a detail "III” Fig. 1.
  • Fig. 4 is a further enlarged view of the detail "III” in the direction of an arrow "IV” in Fig. 3;
  • Fig. 5 is an illustration of a concretization of the arrangement in Fig. 4 in partial section on a line "V" in Fig. 3rd
  • Fig. 1 an arrangement with an electric energy storage cell 2 and four heat sinks 4 is shown in perspective.
  • the heat sink 4 are arranged in pairs on both lateral sides of the electric energy storage cell.
  • the heat sinks 4 each have a solid part 6 and three ribs 8, which protrude away from the bulkhead 6 away from the memory cell 2, that is, towards the outside.
  • Fig. 2 shows the arrangement of Fig. 1 for clarity in an exploded view.
  • the memory cells 2 are constructed as so-called flat cells or pouch cells with opposite, flat current conductors. More specifically, each memory cell 2 has an active part 12, a sealing seam (a peripheral region) 13 and two current conductors 14. In the active part 10 take place the electrochemical reactions for storage and delivery of electrical energy. In principle, any type of electrochemical reaction can be used to construct memory cells; but the description refers in particular to Li-ion batteries, to which the invention is particularly well applicable due to the requirements of mechanical stability and heat balance and economic importance.
  • the active part 12 is sandwiched by two films, wherein the projecting edges of the films are welded together gas- and liquid-tight and form the so-called sealed seam 14. From two opposite narrow sides of the memory cell 2 protrudes a positive or a negative current collector (cell pole) 14 from.
  • the solid part 6 of the heat sink 4 has a pressure surface 20.
  • the pressure surfaces 20 of two heat sink 4 are opposite each other and hold one of the current collector 16 of the memory cell 2 a. This situation is shown in FIG. 3, which shows an arrester area "III" in FIG. 1 enlarged, and in FIG. 4, which shows an enlarged view of this area from another perspective, namely in the direction of an arrow "IV" in FIG 3 shows, more clearly.
  • pole holes 18 three holes 18 (hereinafter referred to as "pole holes” 18) are arranged in the arresters 16.
  • the pole holes 18 are aligned with the through holes 10 in the solid part 6 of the heat sinks 4.
  • Through the holes 10, 18 extend through bolts or tie rods (not shown in detail), by means of which the arrester 18 of the cell 2 are firmly clamped between the pressure surfaces 20 of the heat sink 4.
  • Der Arretende 18 von dem Auslledge 18 in dende Economics 4 Wegschraubt. ing abutment of the tension, such as parts of a housing or the like, are also not shown in detail in the figure.
  • the cooling bodies 4 provide improved cooling via the ribs 8.
  • the cooling can be further improved by a flow of a cooling fluid such as air, water or oil along the fins 8;
  • the ribs on the heat sink or parts thereof may serve to guide the cooling fluid or to swirl it in a targeted manner.
  • the heatsink 8 touch with their massive parts 6, the arrester 16 of the memory cell 2. It therefore takes place a good heat transfer and a highly effective heat release from the interior of the cell 2 to the heatsink. 4
  • the heat sink 4 also serve to pinch the arrester 16 and thus the retention of the memory cells 2 in place. They also serve as spacers, that is, they ensure a predetermined distance of the cell 2 to any housing or the like. Thus, mechanical effects on the active part 12 of the cell 2 are avoided and effectively prevented from such attributable adverse effects on the electrochemical operation inside the cell. Likewise, a flow around the cell 2 is made possible in total by a cooling medium and thus ensures additional cooling.
  • a heat sink 4 another heat sink 4, another cell 2 and another heat sink 4, etc ..
  • a continuation is indicated in dashed lines.
  • the ribs 8 are arranged on one side to the side facing away from the arrester 16.
  • a first of the ribs 8 is offset from the pressure surface 20, while the last of the ribs 8 with the pressure surface 20 opposite surface 22 is aligned.
  • an intermediate body 24 is arranged between two successive surfaces 22.
  • a particularly important in practice series connection of several memory cells 2 can be particularly simple realized by alternating pole position of the arrester 16 and their mutual connection. But it can also be implemented by appropriate arrangement parallel connection or combinations of parallel and series circuits of multiple cells 2.
  • the heat sinks 4 are made of a highly thermally conductive material such as a metal, a ceramic, a composite or the like. With regard to the line properties, the material of the heat sink 4 can be substantiated in several alternatives.
  • the heat sinks 4 can simultaneously serve as electrical contact elements or as insulating bodies, as will be described below with reference to concrete alternatives, and thus be used in a simple manner for the electrical connection of several cells to one another and for the production of the electrical contact to a power consumer or a power source.
  • the heat sinks 4 are made of a good electrical conductor. In this way, a direct electrical connection to the corresponding current conductor 16 of the cell 2 can be produced via the heat sink 4.
  • the heat sink 4 are made of an electrically insulating material.
  • An electrical connection in this case is made in other ways, such as with pinched wires or foils or the like; However, it is a reliable electrical insulation of the floating conductor 16 realized.
  • FIG. 5 shows the arrangement from FIG. 4, wherein the laterally outer region of the arrester 16 and two heat sinks are cut in a plane which runs through the throughbore 10 in the solid part 6 of the heat sink 4 (see arrow "V"). in Fig. 3).
  • an arrangement is shown in which two heat sinks 4, 4 * made of different materials are used.
  • the bottom in the drawing heat sink 4 is made of an electrically insulating material, while the upper heat sink 4 * consists of an electrically conductive material.
  • the one (lower in the drawing) side of the arrester 16 is electrically separated by the insulating heat sink 4 of lower components, while the other (in the drawing upper) side of the arrester 16 through the conductive heat sink 4 electrically can be connected further overhead components.
  • the arrangement of the heat sink 4, 4 * vice versa ie, is chosen so that the insulating heat sink 4 above and the conductive heat sink 4 * below, can be about electrically conductive Housing halves on the one flat side of the cell 2, the potential of the positive pole and on the other flat side of the cell 2, the potential of the negative pole are removed.
  • a series connection of several cells 2 is easy to realize by alternately and alternately between the arresters 16 adjacent cells 2 either two insulating heat sink 4 or two conductive heat sink 4 * are arranged. It is understood that then the intermediate body 24 (or 24 * ) are formed according to insulating or conductive.
  • FIG. 5 also shows concretely that the arrester 16 'in the edge region 14 between the two enveloping films 26, which form the sealing seam, protrude from the interior of the cell 2, where it is connected to the active part of the cell 2 ,
  • a bolt 28 is further shown, which extends through the aligned through holes 10 of the two illustrated heat sink 4 and the PoI- bore 18 of the cell 2 therethrough. It should be noted that such a bolt 18 is provided for each of the total of six pole holes 18, each having associated through holes 10.
  • the bolt 18 serves as a tie rod or as a clamping element, by means of which the arrester 18 of the cell 2 are firmly clamped between the pressure surfaces 20 of the heat sink 4. Corresponding abutment of the tension, such as parts of a housing or the like, are not shown in the figure, but arise inevitably.
  • the outer diameter of the bolt 18 is smaller than the diameter of the through holes 10 and the pole bore 18, so that an annular air gap 30 results.
  • the bolt 18 may be surrounded by an insulating coating or an insulating sleeve.
  • the heat sink 4 are made of an electrically weakly conductive material.
  • An electrical connection is also made in other ways in this case.
  • a reliable electrical insulation Stromableiters 16 but is ensured by additional measures; such as e.g. insulating intermediate bodies 24 are used.
  • the electrical conductivity of the heat sink 4 is not important; rather, the heat conduction properties can be optimized without regard to the electrical properties.
  • FIGS. 6 and 7 show an arrangement of two electric power storage cells 2 and a plurality of heat sinks 4 and spacers 32 as a second embodiment of the present invention.
  • 6 is an overall perspective view
  • FIG. 7 is an edge-side view of the arrangement in the direction of an arrow "VII" in FIG. 6.
  • the structure of the memory cells 2 is identical to that described in connection with the first embodiment.
  • two memory cells 2 are arranged in a stack arrangement.
  • the arrangement is chosen for a series connection so that the positive pole (arrester) of one cell 2 faces the negative pole of the other cell.
  • the current collector on the one lateral side The cells 2 (right side in FIG. 7) are spaced apart by a heat sink 4 ', and the current conductors on the other lateral side of the cells 2 (left side in FIG. 7) are spaced apart by a spacer 32.
  • In the stacking direction follows in each case on a heat sink 4 ', a spacer 32 and vice versa.
  • the heat sinks 4 'in this embodiment are made of a conductor material, while the spacers 32 are made of an electrically insulating material. Thus, even in a longer series of a plurality of memory cells 2 according to the pattern described above, a series connection is realized.
  • the heat sinks 4 ' are made of an electrically insulating material, while the spacers 32 are made of a conductor material.
  • the heat sinks 4 ' are produced from a material optimized with regard to the heat conduction, irrespective of the electrical conductivity.
  • the electrical connection or the electrical insulation by means of a heat sink 4 ' is then possibly realized via other measures.
  • the spacers 32 are provided with ribs and thus also serve as a heat sink.
  • FIG. 8 shows a heat sink 4 "as a third exemplary embodiment of the present invention in perspective view.
  • the heat sink 4 "of this embodiment differs from the heat sink 4 'of the second embodiment in two points, namely, the thickness of the heat sink 4" is reduced in all areas except the direct vicinity of the through holes 10. That is, the pressure surfaces 20 are limited to the immediate area around the through-holes 10 where the bolts also pass. In the remaining area an open space 34 is formed, which is without pressurization by the tension. In the open space 34 empty bores or relief holes 36 are formed, which extend parallel to the through holes 10.
  • the relief holes 34 may be continuous or on one or both sides formed as blind holes.
  • the open areas 34 such as the relief bores 36, cause a considerable reduction in the weight of the heat sink 4 "and increase the heat transfer area to the cooling medium
  • the free areas 34 also allow an exchange of the cooling medium between a region between memory cells arranged in a stack or in an electrical energy storage device (not shown in more detail) and an environment of the stack and thus an even better heat transfer.
  • All embodiments are modifiable to the extent that an electrical connection between or with arresters 16 via special contact elements, which are embedded in the heat sinks. This may be e.g. act around sleeves that surround the bolts 28 in addition.
  • the heat transfer between arrester and heat sink can be improved by heat-conductive casting compounds, adhesives, pastes or elastic heat conducting foils. In this way, gaps between the arrester and the heat sink, which can occur in the case of positive or positive connection, can be bridged.
  • the number of ribs 6 in the embodiments is not set to three. Depending on the desired cooling effect and distance and fewer or more ribs may be provided. In particular, when several arrangements of the first embodiment are stacked, it may be useful to use thinner heat sink with about only two ribs, since the heat sink 4 shown there leads with three ribs 8 to a relatively large distance between adjacent memory cells 2.
  • a centering device for radial centering of the cells 2 within a cell block or relative to the spacer elements.
  • a centering device may consist of passport pins and mating holes in be realized the spacers and arresters or other measures.
  • a tension band is used instead of tie rods for bracing the cell block.
  • a heat sink or a spacer or a plurality of heat sinks and intermediate pieces arranged between current conductors are to be understood as a spacing element in the sense of the invention.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne un dispositif accumulateur d'énergie électrique comprenant : une pluralité de cellules plates accumulatrices, pour l'accumulation et la distribution d'énergie électrique, présentant des conducteurs plats opposés, une pluralité d'éléments d'écartement pour le maintien d'une distance prédéterminée entre les cellules accunulatrices, et un moyen de serrage pour bloquer les cellules en un empilage, les cellules étant fixées respectivement à leurs conducteurs entre les éléments d'écartement, par ajustement serré par ledit moyen de serrage, au moins quelques-uns des éléments d'écartement étant configurés en tant que corps de refroidissement. Les corps de refroidissement présentent des ailettes qui sont en saillie latéralement, à l'extérieur de l'empilage. En variante, les corps de refroidissement sont liés thermiquement avec les conducteurs électriques, via un matériau mou, thermoconducteur. Selon une autre variante, deux corps de refroidissement sont disposés entre des conducteurs électriques voisins. Selon une dernière variante, les éléments d'écartement présentent des trous de dégagement pour l'allègement du poids. Les variantes précitées peuvent être réalisées en combinaison.
EP10706546A 2009-04-08 2010-03-01 Dispositif accumulateur d'énergie électrique présentant des cellules plates et des corps de refroidissement Withdrawn EP2417667A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910016866 DE102009016866A1 (de) 2009-04-08 2009-04-08 Elektroenergie-Speichervorrichtung mit Flachzellen und Kühlkörpern
PCT/EP2010/001261 WO2010115490A1 (fr) 2009-04-08 2010-03-01 Dispositif accumulateur d'énergie électrique présentant des cellules plates et des corps de refroidissement

Publications (1)

Publication Number Publication Date
EP2417667A1 true EP2417667A1 (fr) 2012-02-15

Family

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JP (1) JP2012523652A (fr)
KR (1) KR20120027226A (fr)
CN (1) CN102428601A (fr)
BR (1) BRPI1011714A2 (fr)
DE (1) DE102009016866A1 (fr)
WO (1) WO2010115490A1 (fr)

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CN102428601A (zh) 2012-04-25
JP2012523652A (ja) 2012-10-04
KR20120027226A (ko) 2012-03-21
WO2010115490A8 (fr) 2011-11-17
WO2010115490A1 (fr) 2010-10-14
US20120171545A1 (en) 2012-07-05
BRPI1011714A2 (pt) 2016-03-22
DE102009016866A1 (de) 2010-10-14

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