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WO2025012437A1 - Ensemble circuit pour un système électrique embarqué d'un véhicule, et procédé de fonctionnement d'un ensemble circuit - Google Patents

Ensemble circuit pour un système électrique embarqué d'un véhicule, et procédé de fonctionnement d'un ensemble circuit Download PDF

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Publication number
WO2025012437A1
WO2025012437A1 PCT/EP2024/069835 EP2024069835W WO2025012437A1 WO 2025012437 A1 WO2025012437 A1 WO 2025012437A1 EP 2024069835 W EP2024069835 W EP 2024069835W WO 2025012437 A1 WO2025012437 A1 WO 2025012437A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery modules
circuit
energy source
circuit arrangement
designed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/069835
Other languages
German (de)
English (en)
Inventor
David VERGOSSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxekart Aachen GmbH
Original Assignee
Maxekart Aachen 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 Maxekart Aachen GmbH filed Critical Maxekart Aachen GmbH
Publication of WO2025012437A1 publication Critical patent/WO2025012437A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • 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
    • H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
    • 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
    • B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/30—The power source being a fuel cell
    • 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
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]

Definitions

  • the invention relates to a circuit arrangement for an on-board network of a vehicle, in particular for a high-voltage on-board network of an electrically driven motor vehicle, a method for operating such a circuit arrangement and a motor vehicle with such a circuit arrangement.
  • Electric vehicles especially battery-electric vehicles, are being built and sold in increasing numbers.
  • the electric range of such vehicles is always an issue, as users want to be sure that they can definitely reach their desired destination with the vehicle.
  • the range of electric vehicles is therefore an important factor in the acceptance of electric vehicles.
  • the circuit arrangement according to the invention for an on-board network of a vehicle in particular for a high-voltage on-board network of an electrically driven motor vehicle, comprises a series connection of several battery modules, which are permanently connected in the form of a closed circuit to a voltage tap of the circuit arrangement, which is designed to provide electrical energy for at least one consumer of the on-board network.
  • the battery modules can have at least one Battery cells or multiple battery cells. In the case of multiple battery cells, these can be connected in series and parallel to one another in a wide variety of configurations.
  • the battery cells can be lithium-ion-based battery cells, for example. However, other battery technologies are also possible.
  • the battery modules can be used, for example, to supply an electric drive motor of an electrically powered motor vehicle with energy. Alternatively or additionally, the battery modules can also be designed and used to supply various other consumers of the on-board network of the vehicle in question with electrical energy.
  • the circuit arrangement according to the invention further comprises an energy source for providing direct current for charging the battery modules.
  • the circuit arrangement further comprises a circuit device which is designed to alternately charge the battery modules and to be operated in different circuit positions in which some of the battery modules are connected to the energy source to form a closed electrical circuit, the remaining battery modules not forming a closed electrical circuit with the energy source, and the energy source not forming a closed circuit with the voltage tap in any of the circuit positions.
  • the circuit arrangement also comprises a controller which is designed to control the circuit device to assume the different circuit positions depending on the respective charge states of the battery modules.
  • the control can, for example, control the circuit device alternately so that at least one of the battery modules is always connected to the energy source to form a closed circuit, so that the battery module in question is charged by the energy source, while the other battery modules do not form a closed electrical circuit with the energy source and are therefore not charged by the energy source. In all circuit positions, the energy source does not form a closed circuit with the voltage tap. Any fluctuations in the vehicle electrical system therefore do not affect the energy source.
  • the control and the circuit device can also be designed or set up in such a way that the control can control the circuit device in such a way that several of the battery modules, for example two or more, are connected to the energy source to form a closed electrical circuit and are thereby charged by the energy source, while the remaining other battery modules do not form a closed electrical circuit with the energy source.
  • the circuit device Using the circuit device according to the invention, it is therefore possible in a simple manner to alternately charge the battery modules using the energy source while driving the vehicle.
  • the energy source can serve as a range extender while driving the vehicle by controlling the circuit device accordingly to temporarily connect the battery modules to the energy source so that the relevant battery modules are charged using the energy source. This allows the range that can be achieved using the battery modules to be increased accordingly.
  • the energy source comprises several fuel cells.
  • the energy source serving as a range extender can therefore have a large number of fuel cells, for example hydrogen-based fuel cells, in order to provide the direct current for charging the battery modules.
  • Fuel cells often have a very high level of efficiency, and they also usually generate low emissions during operation. Furthermore, such fuel cells can generate electrical current without mechanical parts, which means that there is virtually no noise and there are almost no wearing parts.
  • the energy source comprises an internal combustion engine, in particular a Wankel engine, and a generator that can be driven by it.
  • the internal combustion engine can be operated with petrol or diesel, for example.
  • the advantage of this embodiment is that the fuel required to operate the internal combustion engine and thus to drive the generator is available almost everywhere, i.e. at petrol stations. If required, fuel can be easily refilled almost anywhere in order to be able to drive the internal combustion engine when required, in order to then drive the generator in turn and provide the electricity to charge the battery modules. It would also be possible to use a flywheel storage device that is charged by the fuel cells mentioned, i.e. set in motion, and which then later releases its energy in the form of electricity.
  • the flywheel storage device could thus be used as a kind of battery replacement.
  • This can work in such a way that the flywheel storage device is present and an electrical machine is mechanically coupled to it, which acts both as a motor and as a Generator can be operated.
  • the machine When charging, the machine is operated as a motor and causes the flywheel to rotate, and to release the energy stored in the form of rotation, the machine is operated as a generator. This would make it possible to create a battery-free drive train. If a DC motor were used, it might even be possible to do without an inverter motor or generator, i.e. the electric machine.
  • the control is set up to control the circuit device in such a way that only one of the battery modules is charged in succession using the energy source.
  • the energy source can be dimensioned in such a way that it is sufficient to charge one of the battery modules, i.e. to charge one of the battery modules at the same time. In other words, it is possible to dimension the energy source relatively small, so that installation space and costs can be saved.
  • Another possible embodiment of the invention provides that the controller is set up to control the circuit device in such a way that several of the battery modules are charged simultaneously using the energy source.
  • This can have the advantage that several of the battery modules can be charged particularly quickly at the same time, for example because a particularly large amount of energy is to be provided by the battery modules.
  • the energy source should also be dimensioned accordingly so that it can provide enough charging power to charge several of the battery modules at once, for example two, three or more of the battery modules.
  • the nominal voltage of the energy source is at least as high as the nominal voltage of the individual battery modules and less than the sum of the nominal voltages of the individual battery modules. If the circuit arrangement is designed exclusively in such a way that only one of the battery modules is charged at a time using the energy source, it may be sufficient to dimension the energy source in such a way that its nominal voltage is at least as high as the nominal voltage of the individual battery modules, i.e. the voltage that can be provided using the energy source is slightly higher than the nominal voltage of the partially discharged battery modules.
  • the circuit arrangement is set up or designed in such a way that, for example, two of the battery modules can also be charged at the same time using the If the battery modules are to be charged using an energy source, the energy source must be dimensioned in terms of its power output and voltage level so that this is also technically possible without any problems. By dimensioning the energy source accordingly larger or smaller, the circuit arrangement can be adapted so that either only one of the battery modules or several of the battery modules can be charged using the energy source at a time.
  • Another possible embodiment of the invention provides that the nominal voltage of the battery modules is the same.
  • the battery modules are all identical in construction. This can bring advantages when procuring the battery modules and with regard to the prices of the battery modules.
  • the circuit device has several switches, each of the battery modules being electrically connected to several connections.
  • the controller is set up to control the circuit device in such a way that the switches are always connected to the connections in their switching position in such a way that a part of the battery modules forms a closed circuit with the energy source and is charged by means of this, with the remaining battery modules not forming a closed circuit with the energy source.
  • the switches can in particular be electronic switches, in particular semiconductor switches, since relays would wear out more quickly. By using electronic switches, these can be operated particularly quickly in a clocked manner in order to establish and then remove the corresponding closed circuits, i.e. to charge the respective battery modules one after the other using the energy source.
  • the battery modules connected in series provide a voltage of more than 48 V, in particular of at least 400 V or 800 V. It can therefore be provided that the battery modules are designed to supply a high-voltage electrical system of a battery-electrically powered motor vehicle with corresponding energy.
  • the controller is set up to control the circuit device in such a way that the battery modules are charged cyclically one after the other using the energy source. This makes it easy to ensure that the battery modules are continuously charged using the energy source, and it is also easy to ensure, for example, that the battery modules differ very little from one another in terms of their voltage level and their state of charge. This can prevent or at least significantly reduce undesirable effects between the battery modules connected in series.
  • Another possible embodiment of the invention provides that there is a direct connection between the energy source and the battery modules without a DC-DC converter while the battery modules in question are charged using the energy source.
  • This can be particularly advantageous if the energy source has said fuel cells. These are not affected by any voltage fluctuations in the vehicle electrical system, since the energy source is decoupled from the vehicle electrical system. It is therefore easy to provide a direct connection between the battery modules and the energy source.
  • the DC-DC converter is saved, which brings advantages in terms of installation space and costs.
  • the entire circuit arrangement can be designed without a DC-DC converter.
  • the circuit device is controlled to assume the different circuit positions depending on the respective charge states of the battery modules, whereby the battery modules are alternately charged by means of the energy source.
  • Advantageous embodiments of the circuit arrangement are to be regarded as advantageous embodiments of the method according to the invention and vice versa, whereby the circuit arrangement can in particular have means for carrying out the method steps.
  • a possible embodiment of the method according to the invention provides that the battery modules are alternately charged by means of the energy source in such a way that the battery modules are kept in a certain range with regard to their state of charge This range can be specified, for example, so that the battery modules do not negatively influence each other. This allows undesirable effects to be successfully minimized or avoided.
  • a possible further embodiment of the method according to the invention provides that the frequency according to which the different switching positions are assumed is selected such that at least one of the following criteria is met: charging of the battery modules is ensured; a predetermined limit value for EM emissions (EMC stands for electromagnetic compatibility) is not exceeded; a predetermined voltage deviation between battery modules is not exceeded.
  • EMC electromagnetic compatibility
  • the frequency is therefore selected at least high enough to ensure sensible charging of the battery modules.
  • the frequency can also be limited in terms of its timing so that no unacceptable EMC emissions arise.
  • the frequency can also be selected so that a predetermined voltage deviation between the battery modules is not exceeded.
  • the battery modules are therefore preferably charged alternately so that the voltage level of the battery modules remains as uniform as possible.
  • the invention also includes a motor vehicle with the circuit arrangement according to the invention or a possible embodiment of the circuit arrangement according to the invention.
  • the motor vehicle can be, for example, an electric vehicle whose electric drive motor can be supplied with energy by means of the battery modules.
  • Fig. 1 is a schematic representation of a circuit arrangement for an on-board network of a vehicle, which has a series connection of two battery modules and an energy source for alternately charging the battery modules, wherein a plurality of switches are provided for alternately connecting the battery modules to the energy source such that the battery modules are charged;
  • Fig. 2 is a further schematic representation of the circuit arrangement, showing a circuit position in which the upper battery module is charged;
  • Fig. 3 is a further schematic representation of the circuit arrangement, showing the circuit position in which the lower battery module is charged;
  • Fig. 4 shows a further schematic representation of a possible embodiment of the circuit arrangement, which now has three battery modules and corresponding switches, so that these battery modules can, for example, be charged alternately by means of the energy source;
  • Fig. 5 shows a further possible embodiment of the circuit arrangement, which again has three battery modules but more switches than in Fig. 4 in order to alternately couple the battery modules to the energy source so that the battery modules are charged.
  • a circuit arrangement 10 for an on-board network 12 of a vehicle is shown in a schematic representation in Fig. 1.
  • the circuit arrangement 10 comprises a series connection of several battery modules 14, 16, which are permanently connected in the form of a closed circuit to a voltage tap 18, 20 of the circuit arrangement 10, which is designed to provide electrical energy for at least one consumer of the on-board network 12.
  • the on-board network 12 can, for example, have an electric drive machine for driving the vehicle in question, wherein the battery modules 14, 16 can be designed to drive this electric drive machine with energy.
  • Other consumers of the on-board network 12, such as infotainment systems, air conditioning systems and the like, can also be supplied with energy by means of the battery modules 14, 16.
  • the circuit arrangement 10 further comprises an energy source 22 for providing direct current for charging the battery modules 14, 16.
  • the energy source 22 can, for example, comprise a plurality of fuel cells.
  • the energy source 22 can, for example, have an internal combustion engine, in particular a Wankel engine, and a generator that can be driven by the latter.
  • the total voltage that can be provided by connecting the two battery modules 14, 16 in series therefore corresponds at least substantially to the voltage required to operate the on-board network 12.
  • the circuit arrangement 10 further comprises a switching device 24 with a plurality of switches S1, S2.
  • the circuit device 24 is designed to alternately charge the battery modules 14, 16 in order to be operated in different circuit positions in which one of the two battery modules 14 is connected to the energy source 22 to form a closed electrical circuit, while the other battery module 14, 16 does not form a closed electrical circuit with the energy source 22, and in all circuit positions the energy source 22 does not form a closed circuit with the voltage tap 18, 20.
  • the circuit arrangement 10 further comprises a controller 26 which is designed to control the circuit device 24, in particular its switches S1, S2, to assume the different circuit positions depending on the respective charge states of the battery modules 14, 16.
  • FIG. 2 the circuit arrangement 10 from Fig. 1 is again shown schematically, wherein the circuit device 24 has been controlled such that the switch S1 is in its position 0 and the switch S2 is also in its position 0.
  • the battery module 14 is connected to the energy source 22 to form a closed electrical circuit, wherein the battery module 16 does not form a closed electrical circuit with the energy source 22.
  • the battery module 14 is therefore charged in this circuit position by means of the energy source 22.
  • FIG. 3 a further circuit position for the circuit arrangement 10 is shown, whereby in the case shown here the switches S1 and S2 are in their position 1, as a result a closed circuit has been established between the battery module 16 and the energy source 22, so that the battery module 16 is now charged by means of the energy source 22.
  • Fig. 4 shows a schematic representation of another possible embodiment of the circuit arrangement 10.
  • the circuit arrangement 10 now comprises three battery modules 14, 16, 28 which are connected in series.
  • the circuit device 24 in turn comprises two switches S1, S2, wherein each of the battery modules 14, 16, 28 is electrically connected to a plurality of terminals 0, 1, 2, 3.
  • the circuit device 24 can be controlled such that the switches S1, S2 are always connected to the terminals 0, 1, 2, 3 in their switching positions such that a portion of the battery modules 14, 16, 28 forms a closed circuit with the energy source 22 and is charged by means of this, wherein the remaining battery modules 14, 16, 28 do not form a closed circuit with the energy source 22.
  • Both the switches S1, S2 shown here and the switches shown previously and below can be electronic switches, especially semiconductor switches, since relays would wear out much faster.
  • the circuit arrangement 10 again comprises three battery modules 14, 16, 28 which are connected in series.
  • the circuit device 24 is implemented somewhat differently in the case shown here and comprises more switches in the form of switches S1, S2, S2.1, S3, S3.1, S4.1.
  • switches S1 and S2.1 are closed in order to charge the topmost battery module 14.
  • switches S2 and S3.1 are closed in order to charge the middle battery module, i.e. battery module 16.
  • switches S3 and S4.1 are closed in order to charge battery module 28.
  • These switch positions can, for example, be cycled through one after the other in order to charge the battery modules 14, 16, 28 cyclically and alternately. Other sequences are of course also possible.
  • the circuit arrangement 10 can also have further battery modules that are not shown here.
  • the circuit device 24 is designed accordingly so that the multitude of battery modules can be charged one after the other by means of the energy source 22, each one individually or several at once.
  • the charge level of the respective battery modules 14, 16, 28 can, for example, be continuously monitored, wherein, depending on this charge level, the battery modules 14, 16, 28 can be charged alternately by correspondingly controlling the circuit device 24. In this case, it can be provided, for example, that the battery modules 14, 16, 28 are kept within a certain range with regard to their charge level.
  • the frequency according to which the different circuit positions are adopted can be selected such that charging of the battery modules 14, 16, 28 is guaranteed at all.
  • the corresponding switches of the circuit device 24 must therefore remain closed or open for such a long time that there is sufficient time to significantly charge the respective battery modules 14, 16, 28 by means of the energy source 22.
  • care must be taken to ensure that a specified limit value for EMC emissions is not exceeded.
  • the switching positions can also be selected so that a specified voltage deviation between the battery modules 14, 16, 28 is not exceeded.
  • Circuit arrangement 12 On-board network 14 Battery module 16 Battery module 18 Voltage tap 20 Voltage tap

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un ensemble circuit (10) pour un système électrique embarqué (2) d'un véhicule comprenant un circuit en série constitué d'une pluralité de modules de batterie (14, 16, 38) qui sont connectés en permanence à une tension d'entrée (18, 20) de l'ensemble circuit (10), qui est conçue pour fournir de l'énergie électrique à au moins une charge du système électrique embarqué (12) ; une source d'alimentation (22) pour fournir un courant continu afin de charger les modules de batterie (14, 16, 28) ; un dispositif de circuit (24) qui, afin de charger et de décharger en alternance les modules de batterie (14, 16, 28), est conçu pour fonctionner dans différents réglages de circuit, dans lesquels certains des modules de batterie (14, 16, 28) sont connectés à la source d'alimentation (22), formant ainsi un circuit électrique fermé, et les modules de batterie restants (14, 16, 28) ne forment pas de circuit électrique fermé avec la source d'alimentation (22), et dans tous les réglages de circuit, la source d'alimentation (22) ne forme pas de circuit fermé avec la tension d'entrée (18, 20) ; et un dispositif de commande (26) qui est conçu pour actionner le dispositif de circuit (24) de façon à adopter les différents réglages de circuit sur la base des états de charge respectifs des modules de batterie (14, 16, 28). L'invention concerne en outre un procédé de fonctionnement d'un tel ensemble circuit (10) et un véhicule à moteur comprenant un tel ensemble circuit (10).
PCT/EP2024/069835 2023-07-13 2024-07-12 Ensemble circuit pour un système électrique embarqué d'un véhicule, et procédé de fonctionnement d'un ensemble circuit Pending WO2025012437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023118592.6A DE102023118592A1 (de) 2023-07-13 2023-07-13 Schaltungsanordnung für ein bordnetz eines fahrzeugs und verfahren zum betreiben einer schaltungsanordnung
DE102023118592.6 2023-07-13

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WO2025012437A1 true WO2025012437A1 (fr) 2025-01-16

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PCT/EP2024/069835 Pending WO2025012437A1 (fr) 2023-07-13 2024-07-12 Ensemble circuit pour un système électrique embarqué d'un véhicule, et procédé de fonctionnement d'un ensemble circuit

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DE (1) DE102023118592A1 (fr)
WO (1) WO2025012437A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
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