WO2022037888A1 - Élément de batterie - Google Patents

Élément de batterie Download PDF

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Publication number
WO2022037888A1
WO2022037888A1 PCT/EP2021/070384 EP2021070384W WO2022037888A1 WO 2022037888 A1 WO2022037888 A1 WO 2022037888A1 EP 2021070384 W EP2021070384 W EP 2021070384W WO 2022037888 A1 WO2022037888 A1 WO 2022037888A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
housing
electrode
base
cell according
Prior art date
Application number
PCT/EP2021/070384
Other languages
German (de)
English (en)
Inventor
Seokyoon Yoo
Martin Hiller
Franz Fuchs
Kevin Gallagher
Frederik Morgenstern
Christophe MILLE
Nikolaos Tsiouvaras
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
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 Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO2022037888A1 publication Critical patent/WO2022037888A1/fr

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
    • H01M10/61—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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • 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
    • H01M10/643—Cylindrical 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
    • 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
    • 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
    • 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
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H01M50/56—Cup shaped 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
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/375—Vent means sensitive to or responsive to temperature
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to a battery cell for a battery in a motor vehicle.
  • the main components of conventional battery cells are two electrodes that are electrically insulated from one another and that are rolled up, for example, to form a jelly roll-shaped electrode packet, a so-called jelly roll, and accommodated in a housing of the battery cell.
  • heat is generated during operation of the battery cell. Reliable heat dissipation is essential to ensure reliable and efficient operation of the battery cell.
  • a separate heat transfer element is arranged between the jelly roll and the housing in conventional battery cells. The heat transfer element is in physical contact with an electrode of the jellyroll and with the housing. In this way, the heat generated in the jelly roll is transferred to the housing via the heat transfer element.
  • the heat transfer capacity of conventional heat transfer elements is very limited and not optimal.
  • the heat transfer element is an additional component that must be manufactured separately and installed in the battery cell.
  • the heat transfer element must first be welded to the jellyroll and then to the housing in a separate manufacturing step.
  • the manufacturing process of the battery cell is therefore complex.
  • the object of the invention is to provide a battery cell of simple construction which has good and efficient heat transfer between the electrodes and the housing and which eliminates the disadvantages of the prior art.
  • a battery cell for a battery of a motor vehicle the one, in particular sleeve-shaped housing that delimits an interior space, and at least one first electrode and at least has a second electrode, both of which are arranged in the interior of the housing.
  • At least one of the at least one first electrode is electrically connected to the housing, and the housing is in direct physical contact with the at least one first electrode. Due to the direct physical contact of the housing with the at least one first electrode, no further components are functionally arranged between the housing and the first electrode. As a result, the number of components can be reduced and production can thus be simplified. Furthermore, a more efficient heat conduction and a more efficient electrical conduction between the housing and the at least one first electrode can be ensured without the interposition of a further component.
  • the housing thus forms part of the at least one first electrode.
  • the housing is, for example, circular-cylindrical.
  • the battery cell represents a motor vehicle battery cell.
  • the battery cell may include an opening in the housing and a unitary cap formed separately from the housing that is disposed in the opening, that is electrically insulated from the housing, and that closes the opening.
  • the at least one second electrode is electrically connected to the cap and the at least one first electrode is electrically connected to the housing. Because the cap is in one piece, the cap does not have any different components, which means that the complexity of the cap can be greatly reduced. As a result, the cap has a very simple structure and only an electrical and/or thermal conducting function, as a result of which the requirements on the cap are significantly reduced and the production of the cap can be significantly simplified.
  • the housing can be made of a thermally conductive and/or electrically conductive material, in particular steel or aluminum, in particular with the housing forming a pole of the battery cell. Accordingly, the housing has several functions as a protective housing and heat conductor and/or electrical conductor. As a result, the number of components can be further reduced.
  • the electrodes are designed as electrode bands and/or formed into an electrode package, in particular in the form of a circular cylinder. in particular rolled up, the electrode pack being fastened directly to the housing, in particular being welded on.
  • the housing has a base and a lateral surface, with the base being in direct physical contact with the at least one first electrode and/or with at least one bulge protruding from the base into the interior, in particular with the base being axisymmetric is.
  • the lateral surface and the base merge into one another in one piece.
  • the base area can bear against another component, for example a cooling device and/or contacting device, with the housing acting as a thermal conductor and/or electrical conductor.
  • the bulges are stamped or embossed, so that the bulges are formed by deforming the base area.
  • the bulges can thus be easily made.
  • the bulges represent contacting surfaces via which contact is made with the at least one first electrode in a thermally conductive and/or electrically conductive manner.
  • the electrode assembly can be directly attached, in particular welded, to the at least one bulge of the base area. As a result, the thermal conductivity and/or electrical conductivity can be improved.
  • the bulge extends from a radially outer side to a radially opposite radially outer side.
  • bulges are provided, which are arranged next to one another in the circumferential direction or radial direction of the base area.
  • a larger contact area between the base area and the at least one first electrode is formed by a plurality of bulges, so that the heat conduction and/or electrical conduction between the base area and the at least one first electrode is improved.
  • the battery cell has a ventilation device that is arranged on the base surface of the housing.
  • the risk of damage to the battery cell due to excess pressure and/or high temperatures can be reduced or avoided by the venting device.
  • the ventilation device can also be provided in a cap of the battery cell.
  • the venting device is designed as a predetermined breaking point, which is destroyed above a specific excess pressure and/or above a specific temperature and then forms a venting opening. The excess pressure and/or the hot air can be released through the ventilation opening. This contributes to the safety of the battery cell.
  • the battery cell can have a cap that is insulated from the housing and forms a second terminal of the battery cell.
  • the cap serves as a detachable closure for the battery cell, which reliably closes an opening in the battery cell and thereby protects the components arranged inside the housing.
  • the battery cell can be electrically contacted via the cap.
  • Figure 1 shows a schematic side view of a motor vehicle with a motor vehicle battery according to the invention, which has a plurality of battery cells according to the invention
  • FIG. 2 shows a schematic sectional view of one of the battery cells according to the invention according to FIG. 1, and
  • FIG. 3 shows a perspective view of the battery cell according to the invention according to FIGS. 1 and 2 during manufacture.
  • a motor vehicle 10 is shown in FIG. 1
  • the motor 12 is coupled to one or more wheels 18 in a known manner.
  • the battery 14 is electrically coupled to the charging port 16 and the electric motor 12 in a known manner. Furthermore, the battery 14 has a plurality of battery cells 20 , four in this embodiment.
  • the battery cell 20 has a sleeve-shaped housing 22 with a circular-cylindrical lateral surface 23 and a base surface 24 . Furthermore, the battery cell 20 comprises a separate cap 26 arranged on an end opposite the base area 24.
  • the housing 22 is formed in one piece.
  • the base 24 merges into the lateral surface 23 of the housing 22 in one piece.
  • the base surface 24 and the lateral surface 23 are therefore an integral part of the housing 22.
  • the housing 22 delimits an interior space 25 which is closed by the cap 26 .
  • An insulator 27 is arranged between the housing 22 and the cap 26, via which the housing 22 and the cap 26 are electrically insulated from one another.
  • a ventilation device in the form of a predetermined breaking point 29 is provided in the base area 24 .
  • the ventilation device or the predetermined breaking point 29 can be formed in the cap 26 .
  • a plurality of bulges 30 are formed in the base area 24, for example by stamping or embossing.
  • the base area 24 thus has an undeformed base section 31 from which the bulges 30 protrude.
  • FIG. 2 shows a section through the battery cell 20 in the area of the bulges 30 .
  • the battery cell 20 is shown from the outside in FIG.
  • the bulges 30 protrude from the base section 31 into the interior space 25 .
  • the bulges 30 extend from a radial outside to a radially opposite, radial outside of the base area 24.
  • the bulges 30 are arranged in the shape of a cross.
  • the battery cell 20 further comprises an electrode pack 28 which is accommodated in the interior space 25 .
  • the electrode pack 28 has a first electrode 32 and a second electrode 34 .
  • the two electrodes 32, 34 are arranged between two electrically insulating insulator layers 36, 38, with an electrically insulating intermediate insulator layer 40 being provided between the two electrodes 32, 34.
  • the electrodes 32, 34 and the insulator layers 36, 38, 40 are formed as bands representing different layers.
  • the individual bands are laid on top of one another in layers and then rolled up to form the electrode pack 28 .
  • the electrode assembly 28 therefore represents a so-called jelly roll.
  • the electrodes 32, 34 and the insulator layers 36, 38, 40 are arranged in an outer sleeve 42, which is in particular electrically insulating.
  • the first electrode 32 is an anode and the second electrode 34 is a cathode.
  • the second electrode 34 is slightly longer than the adjacent insulator layers 36, 38, 40, the first electrode 32 and the outer shell 42.
  • the second electrode 34 protrudes in this area.
  • the protruding sections can also be referred to as second conductors 44 .
  • a contact element 46 is positioned between the electrode assembly 28 and the cap 26 , via which the second conductors 44 are electrically coupled to the cap 26 .
  • the first electrode 32 is longer than the adjacent insulator layers 36, 38, 40, the second electrode 34 and the outer shell 42. In other words, the first electrode 32 protrudes in this area.
  • the protruding portions may be referred to as first drains 48 .
  • the first electrode 32 is electrically and thermally conductively connected to the base surface 24 via the first conductors 48, for example they are in direct physical contact.
  • the first electrode 32 is attached directly to the bulges 30 in an electrically and thermally conductive manner, for example by welding,
  • the electrode pack 28 is pushed into the housing 22, as shown in FIG.
  • the conductors 48 of the first electrodes 32 are welded to the housing 22 or the base area 24 from the outside in the area of the bulges 30 .

Abstract

L'invention concerne un élément de batterie pour une batterie de véhicule à moteur comprenant un boîtier (22) délimitant un espace intérieur (25), ainsi qu'au moins une première électrode (32) et au moins une seconde électrode (34), toutes deux étant placées à l'intérieur (25) du boîtier (22), au moins l'une de l'une ou plusieurs premières électrodes (32) étant électriquement connectée au boîtier (22). Selon l'invention, le boîtier (22) est en contact physique direct avec l'au moins une première électrode (32).
PCT/EP2021/070384 2020-08-17 2021-07-21 Élément de batterie WO2022037888A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020121500.2A DE102020121500A1 (de) 2020-08-17 2020-08-17 Batteriezelle
DE102020121500.2 2020-08-17

Publications (1)

Publication Number Publication Date
WO2022037888A1 true WO2022037888A1 (fr) 2022-02-24

Family

ID=77265059

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/070384 WO2022037888A1 (fr) 2020-08-17 2021-07-21 Élément de batterie

Country Status (2)

Country Link
DE (1) DE102020121500A1 (fr)
WO (1) WO2022037888A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000243433A (ja) * 1998-12-25 2000-09-08 Matsushita Electric Ind Co Ltd 円筒型アルカリ蓄電池とその製造方法
JP2004071266A (ja) * 2002-08-05 2004-03-04 Sanyo Electric Co Ltd 非水電解液二次電池及びその製造方法
US20040142237A1 (en) * 2002-11-21 2004-07-22 Gota Asano Alkaline storage battery and method
US20170092979A1 (en) * 2015-09-30 2017-03-30 Panasonic Corporation Nonaqueous electrolyte secondary batteries

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010059957A2 (fr) 2008-11-21 2010-05-27 Johnson Controls - Saft Advanced Power Solutions Llc Collecteur de courant pour une cellule électrochimique
KR102417637B1 (ko) 2015-10-02 2022-07-06 삼성에스디아이 주식회사 이차 전지
KR102567831B1 (ko) 2015-10-02 2023-08-17 삼성에스디아이 주식회사 이차 전지

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000243433A (ja) * 1998-12-25 2000-09-08 Matsushita Electric Ind Co Ltd 円筒型アルカリ蓄電池とその製造方法
JP2004071266A (ja) * 2002-08-05 2004-03-04 Sanyo Electric Co Ltd 非水電解液二次電池及びその製造方法
US20040142237A1 (en) * 2002-11-21 2004-07-22 Gota Asano Alkaline storage battery and method
US20170092979A1 (en) * 2015-09-30 2017-03-30 Panasonic Corporation Nonaqueous electrolyte secondary batteries

Also Published As

Publication number Publication date
DE102020121500A1 (de) 2022-02-17

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