WO2022022922A1 - Cellule de stockage électrochimique avec pôle disposé de manière asymétrique, et accumulateur d'énergie et véhicule à moteur le comprenant - Google Patents

Cellule de stockage électrochimique avec pôle disposé de manière asymétrique, et accumulateur d'énergie et véhicule à moteur le comprenant Download PDF

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Publication number
WO2022022922A1
WO2022022922A1 PCT/EP2021/067646 EP2021067646W WO2022022922A1 WO 2022022922 A1 WO2022022922 A1 WO 2022022922A1 EP 2021067646 W EP2021067646 W EP 2021067646W WO 2022022922 A1 WO2022022922 A1 WO 2022022922A1
Authority
WO
WIPO (PCT)
Prior art keywords
end wall
storage cell
pole
cell
housing
Prior art date
Application number
PCT/EP2021/067646
Other languages
German (de)
English (en)
Inventor
Azad Darbandi
Tobias Schmieg
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 WO2022022922A1 publication Critical patent/WO2022022922A1/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
    • 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
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/543—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
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • 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

  • Electrochemical storage cell with an asymmetrically arranged pole and energy store and motor vehicle with such
  • the invention relates to a cylindrical, electrochemical storage cell, in particular for driving a motor vehicle.
  • the invention relates to an energy store and a motor vehicle with such a storage cell.
  • Electrochemical-based energy stores which provide electrical energy for driving electrified motor vehicles. These energy stores have a multiplicity of storage cells electrically connected in series and/or in parallel. These storage cells can be, for example, cylindrical storage cells, so-called round cells.
  • FIG. 1 shows a plan view, ie a view of an end face, of such a storage cell 1 from the prior art.
  • this storage cell 1 has an end wall 2 on which a positive pole 3, a bursting membrane 4 and an electrolyte filling opening 5 are arranged.
  • An insulating material 6 is attached between the end wall 2 and the positive pole 3 .
  • the bursting membrane 4 is connected to the end wall 2 by means of a weld seam surrounding the outer contour of the bursting membrane 4 .
  • the electrolyte filling opening 5 is also closed by connecting a small cover to the end wall 2 by means of a weld seam running around the contour of the cover.
  • the end wall 2 is the outer contour of the end wall peripheral weld connected to a hollow cylindrical portion of the housing.
  • the size required for the bursting membrane 4 depends on the energy density of the storage cell and cannot be dimensioned arbitrarily. Due to these smaller gaps, however, there is no longer enough space to attach the weld seams mentioned above. In addition, due to the lack of distance to the insulation material, it can be damaged during welding and the wire connected with it.
  • an electrochemical storage cell is provided with a cylindrical housing having a hollow-cylindrical housing section which is provided with a first end wall at one longitudinal end and with a second end wall at the other longitudinal end; a cell coil accommodated in the housing and comprising an anode material and a cathode material; a positive terminal extending through the first end wall and electrically connected to the anode material, and a negative terminal extending through the second end wall and electrically connected to the cathode material is connected, wherein the positive pole and / or the negative pole are arranged on their respective end walls asymmetrically with respect to respective midpoints of the end walls.
  • Storage cell further an opening for filling an electrolyte inside the housing and a bursting membrane, wherein the opening and the bursting membrane are both arranged within the same half of the first or second end wall.
  • a predominant part of the plus or minus pole is arranged in the other half of the end wall.
  • the invention relates to an electrochemical storage cell with a cylindrical housing having a hollow-cylindrical housing
  • this exemplary embodiment also offers the advantage that there is sufficient space for applying weld seams.
  • the invention relates to an energy store with a first such storage cell; a second such storage cell, and a cell connector which connects a positive or negative pole of the first storage cell to a positive or negative pole of the second storage cell, the connected poles being offset on their associated end wall towards the respective other storage cell from the center point of their associated end wall .
  • the cell connector can be kept as short as possible, which leads to material savings and lower manufacturing costs
  • the present invention provides a motor vehicle with such an energy store.
  • Figure 1 schematically shows a plan view of a prior art memory cell
  • Figure 2 schematically shows a plan view of another memory cell for explanation purposes
  • FIG. 3 schematically shows a front view of a memory cell according to an embodiment of the invention
  • FIG. 4 schematically shows a plan view of the memory cell from FIG. 3, and FIG. 5 schematically shows two memory cells according to FIGS. 3 and 4 connected to one another.
  • Figure 3 shows a schematic front view of a storage cell 10 according to an embodiment of the invention and
  • Figure 4 shows a schematic plan view, ie an end face, of the storage cell from Figure 3.
  • the storage cell 10 is a storage cell on an electrochemical basis for storing and providing Electrical energy, in particular for driving an electrified motor vehicle (not shown), in particular a passenger car.
  • the storage cell 10 is rechargeable. In the motor vehicle, a multiplicity of such storage cells 10 are electrically connected in series and/or in parallel in order to form an energy store.
  • the storage cells 10 are grouped into so-called storage models, which represent a subassembly of the energy store.
  • the memory cells 10 can be grouped again.
  • the memory cells 10 within a group can be electrically connected in series and the groups can in turn be electrically connected to one another in parallel.
  • plastic elements 23 are arranged between the end walls 13, 14 and the associated poles 20, 21. More precisely, these are formed by overmolding the poles 20, 21 with a plastic.
  • the plastic elements 23 are made of a very high-impedance material, for example 10 4 ohms.
  • Reference numeral 28 denotes a center line 28, for example a line of symmetry, of the negative pole 21 on which the center point of the negative pole 21 lies in a plan view (seen along the longitudinal axis 18).
  • the center line 27 and the center line 28 are not congruent with the longitudinal axis 18, but the center lines 27 and 28 are offset from the longitudinal axis 18.
  • the positive pole 20 and/or the negative pole 21 are arranged on their respective end walls 13, 14 asymmetrically with respect to their respective midpoints of the end walls 13, 14 (seen in a horizontal plane which is normal to the longitudinal axis 18).
  • the distance between the longitudinal axis 18 and the center line 27 and/or the center line 28 or (in a top view) the distance between the center point of the end walls 13, 14 and the center point of the positive pole 20 and/or the negative pole 21 is at least 5% of the diameter of the end walls
  • a line 29 is drawn in FIG. 4, which divides the end walls 13 and 14 into two halves of equal size, in particular two symmetrical halves.
  • the bursting membrane 24 and the opening 25 arranged so that both are within the same half with respect to line 29.
  • FIG. 5 schematically shows two storage cells according to FIGS. 3 and 4, which are electrically connected to one another by means of a cell connector 30.
  • the cell connector 30 connects the positive poles 20 of two adjacent storage cells 10, the negative poles 21 of two adjacent storage cells 10 or the positive pole 20 of a storage cell 10 to the negative pole 21 of an adjacent storage cell 10.
  • the asymmetrical arrangement according to the invention of the Positive pole 20 and/or negative pole 21 also means that adjacent storage cells 10, as shown in FIG. 5, which are to be electrically connected, can be rotated relative to one another in such a way that poles 20, 21 to be connected are at the shortest distance from one another.
  • the cell connector 30 can be kept as short as possible, which leads to savings in material and lowers the manufacturing costs.
  • the invention can also be used in a storage cell which has only one negative pole 21 which penetrates the end wall 14 as in the exemplary embodiment described above.
  • the positive pole on the other hand, is formed by the housing 11 or at least the end wall 13, which is electrically conductively connected to the anode 16 for this purpose.

Abstract

L'invention concerne une cellule de stockage électrochimique (10) comprenant un boîtier cylindrique (11) ayant une section de boîtier cylindrique creuse (12) qui comporte une première paroi d'extrémité (13) au niveau d'une extrémité longitudinale avec une seconde paroi d'extrémité (14) au niveau de l'autre extrémité longitudinale ; une bobine de cellule (15) logée dans le boîtier (11) et ayant un matériau d'anode (16) et un matériau de cathode (17) ; un pôle positif (20) s'étendant à travers la première paroi d'extrémité (13) et connecté électriquement au matériau d'anode (16), et un pôle négatif (21) s'étendant à travers la seconde paroi d'extrémité (14) et connecté électriquement au matériau de cathode (17), le pôle positif (20) et/ou le pôle négatif (21) étant disposés de manière asymétrique sur leurs parois d'extrémité respectives (13, 14) par rapport à des points centraux respectifs des parois d'extrémité (13, 14). L'invention concerne également un accumulateur d'énergie et un véhicule à moteur comprenant une cellule de stockage (10) de ce type.
PCT/EP2021/067646 2020-07-28 2021-06-28 Cellule de stockage électrochimique avec pôle disposé de manière asymétrique, et accumulateur d'énergie et véhicule à moteur le comprenant WO2022022922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020119791.8 2020-07-28
DE102020119791.8A DE102020119791A1 (de) 2020-07-28 2020-07-28 Elektrochemische Speicherzelle mit asymmetrisch angeordnetem Pol sowie Energiespeicher und Kraftfahrzeug mit einer solchen

Publications (1)

Publication Number Publication Date
WO2022022922A1 true WO2022022922A1 (fr) 2022-02-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/067646 WO2022022922A1 (fr) 2020-07-28 2021-06-28 Cellule de stockage électrochimique avec pôle disposé de manière asymétrique, et accumulateur d'énergie et véhicule à moteur le comprenant

Country Status (2)

Country Link
DE (1) DE102020119791A1 (fr)
WO (1) WO2022022922A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067610A1 (fr) * 1999-07-08 2001-01-10 Alcatel Accumulateur électrochimique étanche comportant un dispositif de reprise de courant en aluminium
CN105190813A (zh) * 2013-08-05 2015-12-23 古斯有限公司 超级电容器
EP1653530B1 (fr) * 2004-09-07 2016-04-27 Saft Accumulateur présentant deux bornes de sortie de courant sur une paroi de son conteneur
US10090491B2 (en) * 2014-01-16 2018-10-02 Commissariat à l'Energie Atomique et aux Energies Alternatives Electrochemical accumulator with housing and output terminal made of aluminium alloy

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6344292B1 (en) 1997-07-29 2002-02-05 Ngk Insulators, Ltd. Lithium secondary battery
US6159631A (en) 1998-08-27 2000-12-12 Polystor Corporation Overcharge safety vents on prismatic cells
EP0984499B1 (fr) 1998-09-02 2003-03-12 SANYO ELECTRIC Co., Ltd. Pile secondaire au lithium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067610A1 (fr) * 1999-07-08 2001-01-10 Alcatel Accumulateur électrochimique étanche comportant un dispositif de reprise de courant en aluminium
EP1653530B1 (fr) * 2004-09-07 2016-04-27 Saft Accumulateur présentant deux bornes de sortie de courant sur une paroi de son conteneur
CN105190813A (zh) * 2013-08-05 2015-12-23 古斯有限公司 超级电容器
US10090491B2 (en) * 2014-01-16 2018-10-02 Commissariat à l'Energie Atomique et aux Energies Alternatives Electrochemical accumulator with housing and output terminal made of aluminium alloy

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Publication number Publication date
DE102020119791A1 (de) 2022-02-03

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