DE102007007986A1 - Attachment of energy storage cells in a housing - Google Patents

Attachment of energy storage cells in a housing

Info

Publication number
DE102007007986A1
DE102007007986A1 DE200710007986 DE102007007986A DE102007007986A1 DE 102007007986 A1 DE102007007986 A1 DE 102007007986A1 DE 200710007986 DE200710007986 DE 200710007986 DE 102007007986 A DE102007007986 A DE 102007007986A DE 102007007986 A1 DE102007007986 A1 DE 102007007986A1
Authority
DE
Germany
Prior art keywords
energy storage
housing
characterized
storage cells
according
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Withdrawn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
DE200710007986
Other languages
German (de)
Inventor
Peter Dr. Birke
Nevzat GÜNER
Stefan Dr. Migge
Sven Wiethoff
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.)
Temic Automotive Electric Motors GmbH
Original Assignee
Temic Automotive Electric Motors 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 Temic Automotive Electric Motors GmbH filed Critical Temic Automotive Electric Motors GmbH
Priority to DE200710007986 priority Critical patent/DE102007007986A1/en
Publication of DE102007007986A1 publication Critical patent/DE102007007986A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • H01M2/1077Racks, groups of several batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6556Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561Gases
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567Liquids
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

Abstract

The invention relates to an energy store (1) for electrical energy, consisting inter alia of a housing (2), at least one in the housing (2) attached and fixed energy storage cell (3), which consists of at least one on all sides of a flexible house (4). enclosed electrode pair, wherein the flexible house (4) on at least one side of the energy storage cell (3) is sealed by a seam, whereby an adjacent to the electrode pair enclosure (5) is formed. the energy storage cells (3) are fixed in the housing (2) by clamping at least one enclosure (5) between the housing modules (6).

Description

  • The The invention relates to an energy store according to Preamble of claim 1.
  • hybrid drives for motor vehicles have in addition to an internal combustion engine an electrical machine in conjunction with at least one energy storage on. The rechargeable energy storage mainly has the task, by recuperation with an electric motor brake to absorb the electrical energy gained, to store the energy and this - about the electric machine - to Support of the internal combustion engine or the electrical system attributed in a suitable form.
  • When Energy storage can use different technologies Be leaded batteries, capacitors, nickel-metal hydride batteries or lithium-ion batteries. On the one hand, enough energy store and on the other hand briefly deliver high amounts of energy correspondingly high system voltages are required, which only achieved by serial circuits of many single cells can be.
  • While Lead-acid batteries and nickel-metal hydride batteries only with a massive Housing can be operated are for Lithium-ion cells are both rigid metal or metal Plastic as well as flexible housings z. B. of multilayer aluminum composite films known. Special advantages of energy storage cells with flexible Housings are the low packaging weight, a certain outer Flexibility of the entire cell as well as the possibility Inside resulting gas volumes by expansion of the film reversible compensate.
  • From the German Auslegeschrift DE 1 154 845 Such an energy storage cell with flexible housekeeping is known. The electrode package is surrounded there by a gas and liquid-tight elastic plastic sheath, which is penetrated by the electrical connections sealed, wherein the interior of the shell is only slightly larger than the Elektrodenpaketvolumen. Several such flat energy storage cells can be combined with their outer surface lying together to form cell packets and electrically connected in series. The openings of the plastic sheath surrounding the pair of electrodes are gas-tight and liquid-tight by being welded. The weld brings a relatively wide enclosure with it to meet the tightness requirements.
  • Different as in applications for mobile communication technology need Lithium-ion batteries for hybrid vehicles a significant longer life. To penetrate of water over the lateral welds avoiding the composite film in this period are significant wider welds required. Generally is assumed per year life 1 mm weld width. Thus, for the lifetime requirements of at least 10 years, a weld width of at least 10 mm required.
  • In Previous designs are the welds folded in various forms, simply folded or even several times folded. This requires disadvantageous additional steps in cell production and leads especially to the corners of the energy storage cell to mechanical stress in the multilayer composite films. In addition, a spatially not clearly defined created lateral edge.
  • Around such prismatic energy storage cells with flexible housekeeping firmly integrated into a housing, these are in plastic trays inserted and by adhesive bonds or adhesive tapes fixed. But since it can not be estimated how the adhesive joints over the life of the energy storage behave - both from the adhesive strength as well as the chemical reaction with the composite film or the housing - it is desirable to dispense with an adhesive bond.
  • Of the The present invention is therefore based on the object, the disadvantages the folding of the welds and the resulting Shut off mechanical stress at the folds or kinks and on an adhesive bond or adhesive tape on the cell surface to be able to do without.
  • The inventive solution to the problem sees before that the energy storage cells mounted in the housing be by pinching at least one enclosure between Housing parts.
  • This has the advantage of folding to the commonplace the welds can be dispensed with. Thereby additional work steps can be omitted and the composite foil surrounding the electrodes becomes a subjected to less mechanical stress, resulting in their functional reliability too Good is coming. In addition, adhesive bonds to the energy storage cells can be omitted for mounting in the housing. This does not exist more the risk of getting sticky joints over the operating life solve or chemically with the composite foil of energy storage cells react. This, in turn, serves to increase reliability the entire energy storage. Furthermore, by the inventive Solution sufficient movement of the cells in the housing prevented.
  • The Housing is preferably modular, d. H. it exists from several housing modules, which one above the other or juxtaposed and connected or connected are.
  • Preferably the housing modules are separated before assembly before, d. H. they are separated from each other. Pinching the surround the energy storage cells between the housing modules then preferably through the interface between the individual modules, which by suitable means against each other are biased.
  • It but it is also conceivable that the housing consists of modules, which are flexibly interconnected, for example by molded hinges. The pinching of the borders of the energy storage cells takes place in this case also at least partially by the successive lying surfaces of adjacent housing modules.
  • The Surroundings of the energy storage cells are preferably by the clamping firmly attached between two housing modules. The frictional clamping is based on the enclosure acting Contact force of two housing modules and the friction coefficient between Mount and housing module surface. A non-positive Clamping is used for fixing the energy storage cells considered sufficient in the housing; about the Parameter contact force and friction coefficient can be this in sufficiently adapted to the requirements. A frictional attachment has the advantage that the bezels not be deformed and thus the stability and function the flexible house, which preferably by a composite film is hardly affected.
  • With This type of attachment will also be a special feature of any lithium-ion cell - the Change in electrode thickness during processes Loading and unloading the cell (cellular respiration) - taken into account. A cellular respiration is possible without hindrance, since the lateral Traction caused no pressure on the cell surface.
  • alternative is also a positive attachment, possibly paired with a frictional attachment of the mounts between the housing modules possible. This affects However, the stability and function of the mounts far more as in a purely non-positive attachment.
  • Preferably have the attached between the modules of the housing Mounts no electrical arresters on. These would reduce the jamming of the adjacent enclosure.
  • The Energy storage cells can be separated from one another by housing liners be separated. These protect the flexible housekeeping of the Energy storage cells from mechanical damage and Avoid breakdown voltages at high load. Furthermore can be located between the energy storage cells Housing liners on the energy storage cells acting mechanical load, such as vibrations, by additional Reduce bracket or support. In the housing liners can also advantageously cooling channels for air or liquid cooling be introduced.
  • Of the Distance to the energy storage cell enclosing Upper and lower case liners can be made by compressible Stabilizers are guaranteed, which in addition allow a cellular respiration. But it is also conceivable that these housing liners themselves made of a flexible potting, which in cells, which have a low cellular respiration, in terms of expansibility is sufficient.
  • Of Further, the energy storage cells without massive Housing liners are mounted in the housing. In this case, the energy storage cells are preferably by Stabilizers separated, which by their compressible properties conditionally allow a cellular respiration. The stabilizers are preferred arranged so that these coolant channels between form the energy storage cells. These coolant channels are particularly suitable for the passage of air; in principle but is also a passage of coolant conceivable.
  • Further Features, advantages and advantageous embodiments of the invention arise from the dependent claims, as well from the following description of the invention with reference to the attached Drawings.
  • It demonstrate:
  • 1 Housing module with inserted energy storage cell
  • 2 Energy storage of several housing modules with housing liner
  • 3 Energy storage from several housing modules without housing liner
  • 1 shows a housing module ( 6 ) of a housing ( 2 ) for an energy store ( 1 ). In this housing module ( 6 ) is an energy storage cell ( 3 ), which depends on a flexible house ( 4 ) is enclosed. The flexible house ( 4 ) consists of a composite film, preferably of an aluminum minium composite foil, and surrounds the electrode pairs of the energy storage cell ( 3 ) close fitting. The open ends of the house ( 4 ) are sealed together by a seam, not shown in the figures, so that the pairs of electrodes are shielded from the environment. The seam can be made by various methods; for example, by welding, gluing, sewing, knurling (mechanical interlocking of the foil pairs) or their combination with each other. Since the seam has to be made very wide, especially in the case of energy storages with a long service life, in order to ensure the leak-tightness over the entire service life, the seam creates a rather wide border ( 5 ). After inserting the energy storage cell ( 3 ) in a housing module ( 6 ) at least parts of the enclosure ( 5 ) of the energy storage cell into the connecting surfaces of the individual housing modules ( 6 ). After mounting and attaching another housing module ( 6 ) on the housing module ( 6 ) with the inserted energy storage cell ( 3 ) are thus the reaching into the connecting surfaces bezels ( 5 ) between the two housing modules ( 6 ) trapped.
  • 2 shows an energy store ( 1 ), which consists of the in 1 described housing modules ( 6 ) with inserted energy storage cell ( 3 ) consists. The housing modules ( 6 ) are arranged according to the desired voltage of the energy storage in a certain number one above the other and fixed. The housing modules off 2 have housing liners ( 7 ) between the individual energy storage cells ( 3 ) on. These housing liners ( 7 ) protect the flexible house ( 4 ) of the energy storage cells ( 3 ) additionally against damaging influences such as vibrations, since the support of the energy storage cells ( 3 ) through the housing liners ( 7 ) is additionally improved. The housing liners ( 7 ) have coolant channels ( 8th ), by means of which the energy storage cells ( 3 ) can be cooled.
  • 3 shows an energy store ( 1 ) as in 2 described, with the difference that this no housing liners ( 7 ) between the individual energy storage cells ( 3 ) having. The distance between the energy storage cells ( 3 ) is stabilized by stabilizers ( 9 ) (see 1 ), which between the energy storage cells ( 3 ) are mounted. The stabilizers ( 9 ) consist of a compressible material, whereby further the already described cell respiration of the energy storage cells ( 3 ). The stabilizers ( 9 ) are so between the energy storage cells ( 3 ) that between the stabilizers ( 9 ) Coolant channels ( 10 ) are formed. This allows cooling of the energy storage cells ( 3 ) by means of cooling air, but also a liquid cooling is conceivable.
  • 1
    energy storage
    2
    casing
    3
    Energy storage cell
    4
    flexible Hausung
    5
    mount
    6
    housing module
    7
    Housing liner
    8th
    Coolant channel
    9
    stabilizer
    10
    Coolant channel
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - DE 1154845 [0005]

Claims (9)

  1. Energy storage ( 1 ) for electrical energy, consisting inter alia of a housing ( 2 ), at least one in the housing ( 2 ) and attached energy storage cell ( 3 ), which consists of at least one part of a flexible house ( 4 ) enclosed pair of electrodes, wherein the flexible house ( 4 ) on at least one side of the energy storage cell ( 3 ) is sealed by a seam, whereby an adjacent to the electrode pair enclosure ( 5 ), characterized in that the energy storage cells ( 3 ) in the housing ( 2 ) by pinching at least one enclosure ( 5 ) between the housing modules ( 6 ).
  2. Energy storage ( 1 ) according to claim 1, characterized in that the enclosure ( 5 ) between two housing modules ( 6 ) is clamped non-positively.
  3. Energy storage ( 1 ) according to one of claims 1 or 2, characterized in that between the housing modules ( 6 ) jammed mountings ( 5 ) have no electrical arresters.
  4. Energy storage ( 1 ) according to one of claims 1 to 3, characterized in that the energy storage cells ( 3 ) by upper and lower housing liners ( 7 ) are separated from each other.
  5. Energy storage ( 1 ) according to claim 4, characterized in that the housing liners ( 7 ) are formed from a flexible potting.
  6. Energy storage ( 1 ) according to one of claims 4 or 5, characterized in that the housing liners ( 7 ) Coolant channels ( 8th ) exhibit.
  7. Energy storage ( 1 ) according to one of claims 1 to 3, characterized in that the energy storage cells ( 3 ) by stabilizers ( 9 ) are separated from each other.
  8. Energy storage ( 1 ) according to claim 8, characterized in that the stabilizers ( 9 ) Coolant channels ( 10 ) between the energy storage cells ( 3 ) form.
  9. Energy store according to one of claims 1 to 8, characterized in that the energy storage cells ( 3 ) Are lithium ion cells.
DE200710007986 2007-02-17 2007-02-17 Attachment of energy storage cells in a housing Withdrawn DE102007007986A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200710007986 DE102007007986A1 (en) 2007-02-17 2007-02-17 Attachment of energy storage cells in a housing

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200710007986 DE102007007986A1 (en) 2007-02-17 2007-02-17 Attachment of energy storage cells in a housing
DE200811000341 DE112008000341A5 (en) 2007-02-17 2008-02-09 Attachment of energy storage cells in a housing
PCT/DE2008/000222 WO2008098555A1 (en) 2007-02-17 2008-02-09 Fastening of energy storage cells in an enclosure

Publications (1)

Publication Number Publication Date
DE102007007986A1 true DE102007007986A1 (en) 2008-09-04

Family

ID=39434114

Family Applications (2)

Application Number Title Priority Date Filing Date
DE200710007986 Withdrawn DE102007007986A1 (en) 2007-02-17 2007-02-17 Attachment of energy storage cells in a housing
DE200811000341 Pending DE112008000341A5 (en) 2007-02-17 2008-02-09 Attachment of energy storage cells in a housing

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE200811000341 Pending DE112008000341A5 (en) 2007-02-17 2008-02-09 Attachment of energy storage cells in a housing

Country Status (2)

Country Link
DE (2) DE102007007986A1 (en)
WO (1) WO2008098555A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013037742A1 (en) * 2011-09-12 2013-03-21 Avl List Gmbh Rechargeable battery

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038308A1 (en) 2010-07-23 2012-01-26 Evonik Degussa Gmbh Lithium cells and batteries with improved stability and safety, process for their preparation and use in mobile and stationary electrical energy storage
DE102011084000A1 (en) * 2010-11-30 2012-05-31 Behr Gmbh & Co. Kg Apparatus for guiding a cooling fluid and cooling system for cooling an electrical component
US8974943B2 (en) * 2011-01-24 2015-03-10 Guoan Feng Power battery pack cooling apparatus
US20140295235A1 (en) * 2013-03-29 2014-10-02 Samsung Sdi Co., Ltd. Battery module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154845B (en) 1953-06-17 1963-09-26 Dr H C Hans Vogt Gas-tight and leakproof sealed to be operated accumulator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4000961B2 (en) * 2002-09-04 2007-10-31 日産自動車株式会社 assembled battery
JP4062273B2 (en) * 2004-03-31 2008-03-19 日産自動車株式会社 Assembled battery
JP4909895B2 (en) * 2005-06-17 2012-04-04 富士重工業株式会社 Electrical device assembly and film-covered electrical device structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154845B (en) 1953-06-17 1963-09-26 Dr H C Hans Vogt Gas-tight and leakproof sealed to be operated accumulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013037742A1 (en) * 2011-09-12 2013-03-21 Avl List Gmbh Rechargeable battery

Also Published As

Publication number Publication date
WO2008098555A1 (en) 2008-08-21
DE112008000341A5 (en) 2009-11-05

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Legal Events

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8105 Search report available
8143 Withdrawn due to claiming internal priority