WO2024022824A1 - Accumulateur haute tension pour véhicule automobile et véhicule automobile - Google Patents

Accumulateur haute tension pour véhicule automobile et véhicule automobile Download PDF

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Publication number
WO2024022824A1
WO2024022824A1 PCT/EP2023/069350 EP2023069350W WO2024022824A1 WO 2024022824 A1 WO2024022824 A1 WO 2024022824A1 EP 2023069350 W EP2023069350 W EP 2023069350W WO 2024022824 A1 WO2024022824 A1 WO 2024022824A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
cell stack
pouch film
voltage storage
solid
Prior art date
Application number
PCT/EP2023/069350
Other languages
German (de)
English (en)
Inventor
Raimund KOERVER
Malte Finger
Jose Lopez de Arroyabe
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 WO2024022824A1 publication Critical patent/WO2024022824A1/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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H01M10/0418—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes with bipolar electrodes
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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

Definitions

  • the invention relates to a high-voltage storage device for a motor vehicle and a motor vehicle.
  • Batteries in particular lithium-ion batteries, can be used to drive an at least partially electrically driven motor vehicle.
  • individual battery cells are linked together in a combination of multiple parallel connections and a series connection.
  • Cell stacks are formed from individual battery cells, which are connected to form modules in a high-voltage storage system.
  • the individual cells, which are connected to each other by a cell contact system, are monitored by an external battery management system.
  • Solid-state batteries represent a further development of lithium-ion batteries.
  • a porous, liquid-soaked separator is replaced by a solid electrolyte.
  • This solid electrolyte can comprise a ceramic, which can contain sulfides and/or oxides, and/or a solid-like polymer, which can also be in the form of a gel.
  • a solid electrolyte can be integrated into the electrode, in particular to ensure lithium-ion conductivity within the electrodes.
  • the solid electrolyte as its name implies, has the property that it is not flowable.
  • DE 10 2019 131 127 A1 shows a solid-state battery with two or more individual stacks stacked one above the other.
  • the object of the present invention is to provide a high-voltage storage device and a motor vehicle, in which a battery element of the high-voltage storage device can be designed to have a particularly small installation space in order to achieve a particularly to achieve high energy density, and also to provide advantageous cell monitoring.
  • a first aspect of the invention relates to a high-voltage storage device for a motor vehicle.
  • the high-voltage storage device according to the invention has a battery element which comprises several, i.e. at least two, cell stacks connected in series, in particular serially bipolar, each of which has several, i.e.
  • At least two, solid-state cells each of which has a cathode or a cathode part of a bipolar electrode and an anode or an anode part of a further bipolar electrode and a solid electrolyte is arranged between the two bipolar electrodes, which separates the two bipolar electrodes, and the solid cells of the respective cell stack are connected in parallel with one another and the cell stacks or at least two of the cell stacks are welded together in a pouch film, whereby on the A voltage tapping element is arranged in each cell stack, which is each connected to a control device arranged within the pouch film and with this forms a battery management, through which at least one cell voltage of the respective cell stack can be detected, the voltage tapping elements being arranged together with the control device, in particular completely in the pouch film .
  • a battery element for a high-voltage storage device which has solid cells in a bipolar arrangement, with several of the solid cells being connected in a parallel arrangement to form a stack. At least two of the cell stacks, in particular all of the cell stacks present, are then connected in series in a bipolar manner.
  • a cell voltage of around 2 volts for example, one possibility would be to connect 100 cells in parallel and to connect 12 cell stacks in series or serially bipolar in order to obtain a voltage below 60 volts, for example.
  • the voltage taps are brought together at the cell stack level and connected within the pouch film to a microchip - a cell battery management system.
  • the high-voltage storage device results in several advantages.
  • the battery element can be made particularly compact and at the same time A highly integrative design can be realized.
  • a simplification of the high-voltage battery and a wiring harness can be achieved.
  • an increased energy density of the high-voltage storage device can be achieved.
  • Due to the use of the solid cells it is possible, for example, to form particularly thick cells, so that further peripherals, for example additional voltage tapping elements, can be saved.
  • a further advantage is that a particularly flexible cell design is made possible, whereby, for example, the thickness of the layers in the structure of the battery element can be freely selected.
  • the cell assembly i.e.
  • the battery element which is essentially completely embedded in the pouch film except for contact elements or pole connections, can be designed as an “intelligent component” because it has a control device which forms at least a simple battery management system.
  • the high-voltage storage device can, for example, be flexibly formed from several battery elements. Due to a saving in material, in particular copper and/or aluminum, and/or a reduction in production costs, the high-voltage storage device can also be provided at a particularly reduced cost. Another advantage is a reduction in heat losses, as simplified cell contact and material reduction reduce heat losses.
  • the respective voltage tapping element leads from the respective cell stack to a surface of an external cell stack on which the pouch film rests and which is different from an exit surface, i.e. a side of the battery element on which a contact element or a pole is designed, and there meets a junction or is connected to it, which connects the voltage tapping elements to the control device, which is also arranged between the surface and the pouch film, the voltage tapping elements being arranged essentially transversely to the longitudinal direction of the battery element.
  • the combination is, for example, a type of cabling or cable harness. “Substantially transverse to the longitudinal direction” means that a deviation from the longitudinal direction, for example by up to 30 degrees and in particular up to 10 degrees, is made possible.
  • voltage taps are transverse to the Longitudinal extension direction, for example upwards, is guided, connected there and connected, for example by means of a thin flexible circuit board, to the control device, which is designed in particular as a chip.
  • the respective voltage tapping element is guided by the respective cell stack on an edge side of the respective cell stack and there meets a further junction which connects the voltage tapping elements with the control device, which is arranged on a head side or the exit surface of the battery element.
  • the edge side is, for example, one of the surfaces of the respective cell stack, which lies transversely to its longitudinal direction and, furthermore, in particular on a short side and therefore does not correspond to the previously presented surface.
  • the voltage tapping elements are brought together at one edge of the battery element.
  • This assembly which is designed in particular as a cable harness or electrical contact for connection to the control device, is oriented along the longitudinal direction towards the head side, the side of the battery element on which a pole emerges from the pouch film.
  • the control device is arranged on this head side.
  • the respective voltage tapping element leads from the respective cell stack to a surface of an external cell stack, on which the pouch film rests and which is different from the exit surface or the head side, and there meets a junction or is connected to it, which in particular electrically connects the voltage tapping elements to the control device, which is arranged on the head side, wherein the voltage tapping elements are arranged essentially along the longitudinal direction of the battery element.
  • the voltage taps are brought together at the edge and from there guided to the control device at the head of the battery by means of the thin junction. “Substantially along the longitudinal direction” means that a deviation of up to 30 degrees is possible, and in particular a deviation of up to 10 degrees can be realized.
  • the voltage tapping elements and the control device also have the advantage that the installation space of the battery element can be adapted in a particularly advantageous manner.
  • At least one of the voltage tapping elements and/or the control device and/or the assembly are at least partially formed by a flexible circuit board.
  • an electrically usable material is used whose shape can at least be bent.
  • control device has a communication device which can be operated in a wired and/or wireless manner, in particular by means of radio.
  • the control device has a communication port, which represents an interface for data exchange, for example with a control device of the motor vehicle.
  • the data exchange can take place via cable using at least one line.
  • the data exchange can take place wirelessly and/or wirelessly via radio, for example using WLAN, Bluetooth, RFID or the like. This has the advantage that particularly advantageous monitoring of the high-voltage storage unit is made possible.
  • the respective solid cell is cuboid and/or prismatic.
  • the respective solid cell has the shape of a cuboid or a prism.
  • the exit surface or the respective head side, on which a connection element or a pole emerges from the pouch film is arranged on a weld seam of the pouch film.
  • the connection elements or Contacts are formed in particular directly on the weld seam, so that, for example, when welding two film halves, they are placed between them and thus form the exit from the pouch film.
  • At least one of the solid cells is designed to be double-sided.
  • the further cathode or anode can in particular form a part of a further adjacent solid cell.
  • the respective electrode can have both an anode and a cathode for series connection, for example, so that series connection can be implemented particularly advantageously. This results in the advantage that the battery can be designed to take up particularly little space.
  • a second aspect of the invention relates to a motor vehicle.
  • the motor vehicle according to the invention comprises a high-voltage storage device according to the first aspect of the invention.
  • FIG. 1 schematic view of a cell stack of a battery element
  • FIG. 2 shows a schematic view of a further embodiment of the cell stack
  • FIG. 3 schematic view of an embodiment of the battery element
  • FIG. 4 schematic view of a second embodiment of the
  • FIG. 5 schematic view of a third embodiment of the
  • High-voltage storage devices are used to drive an at least partially electrically powered motor vehicle.
  • Lithium-ion batteries in particular are used.
  • a further development of a lithium-ion battery is a so-called solid-state battery, in which solid electrolytes can be combined with bipolar electrodes, for example. This enables the possibility of a so-called bipolar connection, whereby individual cell units can be connected in series and must be housed separately in them.
  • a high-voltage storage device 1 which can be used to drive the motor vehicle, will be presented below using the figures.
  • This comprises a battery element 2, which comprises several, i.e. at least two, cell stacks 3 connected in series in a bipolar manner.
  • 1 shows a schematic view of a first embodiment of such a cell stack 3.
  • the cell stack 3 has several or at least two solid cells 4, each of which has a cathode 5 of a bipolar electrode 6 and an anode 7 of a further bipolar electrode 6, which is provided by a Solid electrolyte 8 is separated from the bipolar electrode 6, wherein the solid cells 4 of the respective cell stack 3 are connected in parallel.
  • At least two of the cell stacks 3 are welded together in a pouch film 9, with a voltage tapping element 10 being arranged on the respective cell stack 3, which is each connected to a control device 11 arranged within the pouch film 9 and with this forms a battery management system 12, through which at least one cell voltage of the respective cell stack 3 can be detected, the voltage elements 10 being arranged completely in the pouch film 9 together with the control device 11.
  • the respective bipolar electrode 6 can have an arrester 19, which is arranged between the two anodes 7 or cathodes 5 or between an anode 7 and cathode 5 in an alternative embodiment.
  • FIG. 1 shows a possible embodiment of a cell stack 3, which in the exemplary embodiment is composed of two solid cells 4, for example.
  • the embodiment of the cell stack 3 according to FIG. 1 is used for the two exemplary embodiments according to FIGS. 3 and 4.
  • FIG. 2 shows an analogous structure of a cell stack 3, but in an alternative geometric arrangement, which is used for the design of the exemplary embodiment according to FIG. 5.
  • the respective cathode 5 and/or the anode 7 of a respective solid cell 4 can be designed to be double-sided.
  • the respective battery element 2 of FIGS. 3 to 5 each comprises two connection elements 13, one of which forms the positive pole and the other the negative pole of the cell stacks 3 connected in series, in particular serially bipolar, the connection being indicated by the connecting lines between the cell stacks 3 .
  • the connecting elements 13 in particular leave the pouch film 9 in opposite directions, which applies to the exemplary embodiments according to FIGS. 3 to 5.
  • the respective area at which the connection elements 13 leave the cell can be designed as an exit surface 14.
  • the first exemplary embodiment shown in FIG. 3 is designed in such a way that the respective voltage tapping element 10 extends from the respective cell stack 3 to a surface 15 of an external cell stack 3, against which the pouch film 9 rests and which is different from the exit surface 14. led and there on one Merger 16 meets, which connects the voltage tapping elements 10 with the control device 11, which is also arranged between the surface 15 and the pouch film 9, the voltage tapping elements 10 being arranged essentially transversely to the longitudinal direction of the battery element 2.
  • FIG 4 shows a schematic view of the second exemplary embodiment of the battery element 2, in which the respective voltage tapping element 10 is guided by the respective cell stack 3 on an edge side of the respective cell stack 3 and meets a further junction 16, which connects the voltage tapping elements 10 with the Control device 11 connects, the control device 11 being arranged on a head side, the positive pole, of the battery element 2.
  • Fig. 5 shows the third exemplary embodiment, whereby a cell stack according to Fig. 2 is used, with the respective voltage tapping element 10 from the respective cell stack 3 to a surface of an external cell stack 3, on which the pouch film 9 rests and which from the exit surface 14 is different, leads, and there meets a junction 16, which connects the voltage tapping elements 10 with the control device 11, which is arranged on the head side, the voltage tapping elements 10 being arranged essentially along the longitudinal direction of the battery element 2.
  • the longitudinal extension direction is the direction in which the battery element 2 has the longest extension, in particular in the case of a substantially cuboid design, with length, width and height, the length coinciding with the longitudinal extension direction.
  • the at least one voltage tapping element 10 and/or the control device 11 and/or the junction 16 is at least partially formed by a flexible circuit board. Furthermore, it is advantageous if the respective solid cell 4 is cuboid and/or prismatic.
  • the respective control device 11 advantageously has a communication device or is designed with this for wired and/or wireless exchange, for example communication ports 17 are provided.
  • connection elements 13 are arranged on a weld seam 18 of the pouch film 9. Furthermore, a motor vehicle is presented which includes a high-voltage storage device 1 according to one of the embodiments shown.
  • the high-voltage storage device 1 presented results in numerous advantages: For example, a particularly space-saving design can be implemented. Furthermore, a highly integrative design results. This results in higher energy densities and the battery element 2 or the high-voltage storage device 1 can be particularly advantageously adapted to the required geometric properties. In addition, the battery element 2 can be operated in particular as an intelligent component, which results in a certain modularity. A particularly advantageous bipolar ASSB pouch cell is presented here.

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  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un accumulateur haute tension (1) pour un véhicule automobile, comprenant un élément de batterie (2) qui comprend un certain nombre d'empilements de piles (3) qui sont connectés en série et dont chacun a un certain nombre de piles à l'état solide (4) qui comprennent chacune une cathode (5) d'une électrode bipolaire (6) et une anode (7) d'une autre électrode bipolaire (6) et un électrolyte à l'état solide (8) est disposé entre ces deux électrodes bipolaires (6) et les piles à l'état solide (4) de l'empilement de piles respectif (3) sont interconnectées en parallèle et au moins deux des empilements de piles (3) étant soudés ensemble dans une pochette (9), un élément de prise de tension (10) étant disposé sur l'empilement de cellules (3) respectif, chaque élément de prise de tension étant connecté à un dispositif de commande (11) disposé à l'intérieur de la pochette (9) et formant un système de gestion de batterie (12) avec le dispositif de commande, au moins une tension de pile de la pile à l'état solide respective (4) pouvant être détectée par le système de gestion de batterie, les éléments de prise de tension (10) étant disposés entièrement dans la pochette (9) conjointement avec le dispositif de commande (11). L'invention concerne également un véhicule automobile.
PCT/EP2023/069350 2022-07-26 2023-07-12 Accumulateur haute tension pour véhicule automobile et véhicule automobile WO2024022824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022118702.0A DE102022118702A1 (de) 2022-07-26 2022-07-26 Hochvoltspeicher für ein Kraftfahrzeug und Hochvoltspeicher
DE102022118702.0 2022-07-26

Publications (1)

Publication Number Publication Date
WO2024022824A1 true WO2024022824A1 (fr) 2024-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/069350 WO2024022824A1 (fr) 2022-07-26 2023-07-12 Accumulateur haute tension pour véhicule automobile et véhicule automobile

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DE (1) DE102022118702A1 (fr)
WO (1) WO2024022824A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2250689B1 (fr) * 2008-03-10 2013-08-07 Nissan Motor Co., Ltd. Batterie à électrode de batterie et son procédé de fabrication
DE102019131127A1 (de) 2019-11-18 2021-05-20 Bayerische Motoren Werke Aktiengesellschaft Feststoffbatterie
US20210257651A1 (en) * 2018-05-30 2021-08-19 Robert Bosch Gmbh Battery Including Bipolar Cells that have a Cell Edge Seal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6725382B2 (ja) 2016-09-21 2020-07-15 株式会社東芝 組電池、電池パックおよび車両
DE102017202359A1 (de) 2017-02-14 2018-08-16 Bayerische Motoren Werke Aktiengesellschaft Energiespeichermodul, energiespeichersystem, fahrzeug und verfahren zum messen einer zellenspannung
GB2566255B (en) 2017-08-23 2021-02-24 Hyperdrive Innovation Ltd Battery safety protection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2250689B1 (fr) * 2008-03-10 2013-08-07 Nissan Motor Co., Ltd. Batterie à électrode de batterie et son procédé de fabrication
US20210257651A1 (en) * 2018-05-30 2021-08-19 Robert Bosch Gmbh Battery Including Bipolar Cells that have a Cell Edge Seal
DE102019131127A1 (de) 2019-11-18 2021-05-20 Bayerische Motoren Werke Aktiengesellschaft Feststoffbatterie

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Publication number Publication date
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