WO2020083874A1 - Système de batterie pour véhicule électrique, procédé de fonctionnement d'un système de batterie et véhicule électrique - Google Patents

Système de batterie pour véhicule électrique, procédé de fonctionnement d'un système de batterie et véhicule électrique Download PDF

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Publication number
WO2020083874A1
WO2020083874A1 PCT/EP2019/078657 EP2019078657W WO2020083874A1 WO 2020083874 A1 WO2020083874 A1 WO 2020083874A1 EP 2019078657 W EP2019078657 W EP 2019078657W WO 2020083874 A1 WO2020083874 A1 WO 2020083874A1
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WO
WIPO (PCT)
Prior art keywords
battery
balancing unit
modules
electric vehicle
battery modules
Prior art date
Application number
PCT/EP2019/078657
Other languages
German (de)
English (en)
Inventor
Christoph Woll
Thorsten Schneider
Dietrich Klauk
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2020083874A1 publication Critical patent/WO2020083874A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between 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
    • H01M10/42—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
    • 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
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/667—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an electronic component, e.g. a CPU, an inverter or a capacitor
    • 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
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a battery system for an electric vehicle, comprising a plurality of battery modules, each battery module having a plurality of battery cells, and each battery module having at least one internal balancing unit, by means of which charge states of the battery cells within the battery module can be adjusted, and at least one external one Balancing unit, by means of which charge states of the battery modules can be adjusted.
  • the invention also relates to a method for operating a battery system according to the invention and an electric vehicle, in particular a construction machine, which comprises a battery system according to the invention.
  • Rechargeable battery systems are used in such electric vehicles, primarily to supply electrical drive devices with electrical energy.
  • Battery systems with lithium battery cells are particularly suitable for such applications.
  • Lithium battery cells are characterized, among other things, by high energy densities, thermal stability and extremely low self-discharge.
  • Several lithium battery cells of this type are electrically connected to one another in series and in parallel and connected to form battery modules.
  • a battery system of the electric vehicle comprises a plurality of battery modules designed in this way and connected in series and in parallel with one another.
  • Construction machines such as excavators, require battery systems that have an increased voltage and an increased capacity for storing a higher amount of electrical energy compared to battery systems for passenger cars.
  • the battery cells age over a longer period of time, which among other things manifests itself in a decreasing capacity of the battery cells.
  • the battery cells for driving the electric vehicle and for supplying further consumers are discharged.
  • the battery cells discharge slightly in the form of self-discharge.
  • the discharge of the battery cells does not necessarily take place evenly.
  • the charges of the battery cells thus differ from one another, and the voltages of the battery cells are not all at the same level. The reason for this is in particular different aging of individual battery cells. With increasing aging, the battery cells are discharged faster. To operate such a battery system in one
  • Electric vehicles must have approximately the same state of charge in the individual battery cells. In electric vehicles, therefore, the charge states of the individual battery cells are regularly balanced. Such balancing is also known as balancing.
  • Memory modules is replaced by a new memory module, the voltages of the memory modules must be adapted to one another.
  • each of the memory modules has a balancing unit.
  • the document US 2014/0354212 A1 discloses an electrical storage system which has a plurality of battery modules, each battery module having a plurality of battery cells. Each battery module has a passive balancing unit, by means of which voltages of the battery cells within the battery module can be adjusted.
  • the storage system also has an active balancing unit, by means of which voltages of the battery modules can be adjusted.
  • a battery system for an electric vehicle, in particular for a construction machine such as an excavator, is proposed.
  • Battery system includes a plurality of battery modules, each battery module having a plurality of battery cells.
  • the battery modules are connected to one another in series and / or in parallel within the battery system.
  • the battery cells are connected in series and / or in parallel with one another within the battery modules.
  • the battery system has a system voltage of, for example, 800 V.
  • Each battery module of the battery system has at least one internal one
  • Balancing unit on Different charge states of the battery cells within the battery module can be adjusted by means of the internal balancing unit. Different charge states of the battery cells can be recognized, for example, by the battery cells having different cell voltages within the battery module.
  • the battery system further comprises at least one external balancing unit. Different charge states of the battery modules can be adjusted using the external balancing unit. Different charge states of the
  • Battery modules can be recognized, for example, in that the battery modules have different module voltages within the battery system.
  • the battery modules of the battery system are arranged on a chassis, the individual battery modules being able to be removed from the chassis separately and independently of one another.
  • the individual battery modules being able to be removed from the chassis separately and independently of one another.
  • the battery cells of the newly inserted battery module generally have a lower aging and a higher capacity than the battery cells of the old battery modules already present on the chassis.
  • the at least one external balancing unit is designed such that by means of the external Balancing unit electrical energy is transferable from one battery module to another battery module.
  • the external balancing unit has, for example, an input and an output. Electrical energy is possible from battery modules, which are electrically connected to the input of the external balancing unit, to battery modules, which are electrically connected to the output of the external balancing unit.
  • the transfer of electrical energy from one battery module to another battery module to adjust charge states is also referred to as active balancing.
  • active balancing the electrical energy advantageously remains largely in the battery system and is only converted to a small proportion into thermal energy.
  • the at least one external balancing unit is thus designed as an active balancing unit.
  • a new battery module Due to the lower aging of its battery cells, a new battery module generally has a higher energy consumption and thus a higher charge level than the old battery modules.
  • the newly inserted battery module is therefore advantageously electrically connected to the input of the external balancing unit, while the old battery modules are electrically connected to the output of the external balancing unit. This means that electrical energy can be transferred from the new battery module to the old battery module.
  • the newly inserted battery module is electrically connected to the input of the external balancing unit.
  • the battery module which was previously electrically connected to the input of the external balancing unit, is then preferably electrically connected to the output of the external balancing unit.
  • one battery module is preferably electrically connected to the input of the external balancing unit, and the remaining battery modules are electrically connected to the output of the external balancing unit.
  • At least one of the internal balancing units has at least one consumer, by means of which electrical energy can be converted from a battery cell into thermal energy.
  • the conversion of electrical energy into thermal energy for the adjustment of charge states is also called passive balancing.
  • the at least one internal balancing unit is thus designed as a passive balancing unit. Passive balancing units have a relatively simple structure and are therefore available at low cost.
  • At least one of the internal balancing units is designed such that electrical energy can be transferred from one battery cell to another battery cell by means of the internal balancing unit.
  • the at least one internal balancing unit is thus designed as an active balancing unit.
  • the at least one internal balancing unit is preferably designed such that electrical energy can be transferred from each battery cell connected to the internal balancing unit to each of the remaining battery cells connected to the internal balancing unit.
  • the charge states of the battery cells of the battery modules are recorded, for example by means of a central monitoring unit of the battery system.
  • the charge states of the battery cells are recorded, for example, by measuring the cell voltages of the battery cells.
  • the charge states of the battery cells within a battery module are then compared with one another.
  • the charge states of the battery cells within a battery module are recognized as different if the charge states of at least two battery cells within one
  • the first battery module After the detection of different charge states of battery cells in at least one of the battery modules, the first
  • Charge states of the battery cells within each of the battery modules are matched by means of the internal balancing units. After this step, the charge states of the battery cells within each of the battery modules are at least approximately the same. The charge states of the battery cells within the battery modules are matched, for example, as passive balancing.
  • Battery modules are made, for example, by measuring the module voltages of the battery modules. The charge states of the
  • Battery modules adjusted using the at least one external balancing unit After this step, the charge states of the battery modules of the battery system are at least approximately the same.
  • the aging of the battery cells of the battery modules is also advantageously detected during operation of the battery system, for example by means of the central monitoring unit of the battery system.
  • the aging of the battery cells is detected, for example, by determining the energy that can be drawn from the battery cells.
  • a battery module identified as defective, or a battery module whose battery cells have aged relatively severely, is then advantageously removed from the chassis of the battery system, and a new battery module is then arranged on the chassis.
  • the defective battery module is therefore replaced by a new battery module.
  • the battery cells of the newly inserted battery module generally have a lower aging and a higher energy consumption than the battery cells of the old battery modules already present on the chassis.
  • electrical energy is transferred from one battery module to another battery module by means of the at least one external balancing unit in order to match the charge states of the battery modules.
  • Active balancing is therefore preferred between the battery modules instead.
  • the electrical energy advantageously remains largely in the battery system and is only converted to a small proportion into thermal energy.
  • a newly inserted battery module generally has a higher one due to the lower aging of its battery cells
  • Active balancing also converts a share of electrical energy into thermal energy, albeit to a lesser extent.
  • electrical energy is also converted into thermal energy.
  • a liquid circuit of the electric vehicle can advantageously be tempered by means of the thermal energy generated in this way.
  • An electric vehicle in particular a construction machine, for example an excavator, is also proposed.
  • the invention is also proposed.
  • Electric vehicle includes at least one according to the invention
  • the at least one external balancing unit is arranged in such a way that a liquid circuit of the electric vehicle can be tempered with thermal energy generated by the balancing unit.
  • At least one of the internal balancing units, preferably all internal balancing units, of the battery modules is also arranged such that a liquid circuit of the electric vehicle can be heated with thermal energy generated by the balancing unit.
  • the liquid circuit can be, for example
  • the liquid circuit can also be part of a hydraulic system as a working machine trained electric vehicle. This can for example
  • the battery system according to the invention enables a longer operating time to be achieved by effectively using the higher energy content of the newly inserted battery module. If one of the battery modules is defective, it is only necessary to replace the defective battery module and not to replace the entire battery system.
  • the external balancing unit does not necessarily have to be installed in the battery system when the electric vehicle is being manufactured. It is conceivable to put the external balancing unit in for the first time
  • the method according to the invention in particular allows the electrical energy of a newly inserted battery module, which due to its lower aging and its higher capacity to store a larger amount of electrical energy than the old battery modules, to be used effectively and transmitted to the old battery modules.
  • Figure 1 is a schematic representation of an electric vehicle in the form of a
  • Figure 2 is a schematic representation of a battery system.
  • FIG. 1 shows a schematic representation of an electric vehicle 1 in the form of a construction machine.
  • the construction machine in the present case is an excavator.
  • the electric vehicle 1 includes, among other things, a battery system 10, which in the present case has a system voltage of 800 V.
  • the battery system 10 which in the present case has a system voltage of 800 V.
  • Battery system 10 provides, among other things, electrical energy for one
  • the battery system 10 also provides electrical energy for driving
  • Battery system 10 is a fly hydraulic pump with electrical energy to provide a required operating pressure in a hydraulic system as
  • Hydraulic cylinders 20 are activated, for example, by means of a liquid in the hydraulic system under operating pressure.
  • the electric vehicle 1 designed as a work machine does not have a hydraulic system.
  • the work machine can be operated completely electrically.
  • electric vehicle 1 is an electric motor, in particular a servomotor.
  • FIG. 2 shows a schematic illustration of a battery system 10 for the electric vehicle 1 shown in FIG. 1.
  • the battery system 10 comprises a plurality of, in the present case eight, battery modules 5.
  • Said battery modules 5 can be connected in series and / or in parallel.
  • each of the battery modules 5 has a module voltage of 800 V, and that all battery modules 5 are connected in parallel.
  • each of the battery modules 5 has a module voltage of 100 V, and that all battery modules 5 are connected in series.
  • combinations of serial and parallel connection are also possible.
  • the battery modules 5 of the battery system 10 are arranged on a chassis, not shown here.
  • the individual battery modules 5 can be removed from the chassis separately and independently of one another.
  • defective battery modules 5 can be removed in this way and replaced by new battery modules 5.
  • Each of the battery modules 5 of the battery system 10 comprises a plurality of battery cells, not explicitly shown here.
  • the battery cells 2 can be connected to one another both in parallel and in series within the respective battery module 5.
  • all battery modules 5 of the battery system 10 are of identical design.
  • Each battery module 5 has an internal balancing unit 30. Charge states of the battery cells within the respective battery module 5 can be adjusted by means of the internal balancing unit 30.
  • the internal balancing units 30 are designed as passive balancing units, by means of which electrical energy of the battery cells can be converted into thermal energy.
  • the internal balancing units 30 each have a consumer in the form of a resistor.
  • the battery system 10 further comprises an external balancing unit 40.
  • the external balancing unit 40 can be used to adjust the charge states of the battery modules 5. In the present case, the external balancing unit 40 is active
  • the external balancing unit 40 has, for example, an inductive one
  • Transmission unit in the form of a transformer.
  • the external balancing unit 40 has an input 41 and an output 42. Electrical energy can be transferred from the input 41 to the output 42. In the illustration shown here, this includes Battery system 10 seven old battery modules 5 and a newly inserted battery module 5.
  • the old battery modules 5 are with the output 42 of the external
  • Balancing unit 40 electrically connected, and the newly inserted
  • Battery module 5 is electrically connected to input 41 of external balancing unit 40. Electrical energy can thus be transferred from the newly inserted battery module 5 to the old battery module 5. Exactly one battery module 5 is present with the input 41 of the external one
  • Balancing unit 40 electrically connected. However, it is also conceivable to electrically connect a plurality of battery modules 5, the battery cells of which have relatively little aging, to the input 41 of the external balancing unit 40.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un système de batterie (10) pour un véhicule électrique, en particulier pour un engin de chantier, comprenant une pluralité de modules de batterie (5), chaque module de batterie (5) présentant une pluralité d'éléments de batterie et chaque module de batterie (5) présentant au moins une unité d'équilibrage interne (30) au moyen de laquelle des états de charge des éléments de batterie dans le module de batterie (5) peuvent être ajustés et au moins une unité d'équilibrage externe (40) au moyen de laquelle des états de charge des modules de batterie (5) peuvent être ajustés. Les modules de batterie (5) sont disposés sur un châssis, les différents modules de batterie (5) pouvant être enlevés séparément et indépendamment les uns des autres du châssis. L'invention concerne également un procédé pour le fonctionnement d'un système de batterie (10) selon l'invention, dans lequel, après la détermination des différents états de charge des éléments de batterie dans au moins un des modules de batterie (5), les états de charge des éléments de batterie dans chaque module de batterie (5) sont d'abord ajustés au moyen des unités d'équilibrage interne (30) et ensuite, les états de charge des modules de batterie (5) sont ajustés au moyen de ladite au moins une unité d'équilibrage externe (40). L'invention concerne en outre un véhicule électrique qui comprend un système de batterie (10) selon l'invention qui fonctionne à l'aide du procédé selon l'invention.
PCT/EP2019/078657 2018-10-26 2019-10-22 Système de batterie pour véhicule électrique, procédé de fonctionnement d'un système de batterie et véhicule électrique WO2020083874A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018218316.3A DE102018218316A1 (de) 2018-10-26 2018-10-26 Batteriesystem für ein Elektrofahrzeug, Verfahren zum Betreiben eines Batteriesystems und Elektrofahrzeug
DE102018218316.3 2018-10-26

Publications (1)

Publication Number Publication Date
WO2020083874A1 true WO2020083874A1 (fr) 2020-04-30

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WO (1) WO2020083874A1 (fr)

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CN116494833A (zh) * 2023-05-15 2023-07-28 沃尔特电子（苏州）有限公司 两轮车电池管理方法、装置、电子设备及储存介质

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