WO2023072444A1 - Procédé de fonctionnement de système de batterie, et système de batterie - Google Patents

Procédé de fonctionnement de système de batterie, et système de batterie Download PDF

Info

Publication number
WO2023072444A1
WO2023072444A1 PCT/EP2022/071029 EP2022071029W WO2023072444A1 WO 2023072444 A1 WO2023072444 A1 WO 2023072444A1 EP 2022071029 W EP2022071029 W EP 2022071029W WO 2023072444 A1 WO2023072444 A1 WO 2023072444A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery packs
combination
packs
switching states
Prior art date
Application number
PCT/EP2022/071029
Other languages
German (de)
English (en)
Inventor
Daniel Manka
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
Priority to CN202280072151.0A priority Critical patent/CN118159445A/zh
Publication of WO2023072444A1 publication Critical patent/WO2023072444A1/fr

Links

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
    • 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
    • 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
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering

Definitions

  • the invention relates to a method for operating a battery system that includes a number of battery packs that are connected in parallel and each have a battery control unit for controlling and monitoring the corresponding battery pack and a switching unit for switching the corresponding battery pack on and off.
  • the switching units each enable a plurality of switching states of the corresponding battery pack, each of which is labeled with a state number.
  • the invention also relates to a battery system.
  • Such electrically powered vehicles such as hybrid vehicles and electric vehicles, each include a battery system, such as a 48V battery system, for powering or traction of the vehicle.
  • the battery system can include multiple battery packs. Connecting several individual battery packs in parallel to form a battery system is advantageous because the energy and power can be scaled for different purposes.
  • Document US 2016/0049813 A1 describes an energy storage device that includes a plurality of modules, each containing secondary batteries, a charging switch that controls charging of the secondary batteries, a discharging switch that controls discharging of the secondary batteries, and a voltage measuring unit that measures a voltage of the Module measures, and a switch control unit that controls the charging switch and / or the discharging switch includes.
  • the document US 2019/0103750 Al describes an energy management system for use in connection with battery cells, which enables the cells and batteries to be converted into variable energy storage sources that can be used in devices such as B. electric vehicles or grid storage can be used.
  • a method for operating a battery system which comprises a plurality of battery packs which are connected to one another in parallel and each have a battery control unit for controlling and monitoring the corresponding battery pack and a switching unit for switching the corresponding battery pack on and off.
  • the switching units each enable a plurality of switching states of the corresponding battery pack, each of which is labeled with a state number.
  • the switching units can each be designed as a semiconductor switch, such as a MOSFET or IGBT.
  • the switching unit can comprise a plurality of switches which are connected in parallel to one another in order to switch off large currents.
  • the switching unit can also include two switches that are connected back-to-back in series. This back-to-back circuit allows current to flow in both the charging and discharging directions.
  • the battery packs each include one or more battery cells that are connected to one another in parallel and/or in series.
  • the battery cells are preferably designed as lithium-ion cells.
  • one of the battery control units is first selected as the master battery control unit, while the other battery control units are each designated as the slave battery control unit.
  • the battery pack that includes the master battery controller is referred to as the master battery pack, while the other battery packs are each referred to as the slave battery pack.
  • a number N of available battery packs is then specified.
  • the “available battery pack” includes all battery packs in the battery system, regardless of their state of charge.
  • the number N is determined and defined by the master battery control unit.
  • the status information of the respective battery packs is transmitted to the master battery control unit.
  • the status information includes the parameters required for further calculation, e.g. B. a maximum allowed current flowing through the battery system.
  • the parameters can be, for example, the temperature of the battery pack, the state of charge (SOC) of the battery pack and the voltage level of the battery pack as well as the constantly updated parameters of a battery model for the respective battery pack, the current charging and discharging current limits for the respective battery pack and the Include impedance from the battery model for the respective battery pack, etc., and are transmitted from the respective slave battery control units to the master battery control unit.
  • the transmission can take place via a communication line, such as a CAN or LIN bus.
  • the battery model of a battery pack can be designed as a Thevenin battery model with an RC element. It is also conceivable that the battery model of a battery pack includes several RC elements.
  • the battery model comprises an ohmic internal resistance, a polarization resistance and a polarization capacitance which is connected in parallel with the polarization resistance, and an ideal voltage source.
  • the status information also includes, for example, the no-load voltage of the ideal voltage source, the size of the ohmic internal resistance and the voltage drop across the RC element.
  • Compensating currents are then calculated for each combination of the switching states of the battery packs, which flow between the battery packs in the case of the respective combination, based on the state information and a model for the battery system composed of the battery models of the respective battery packs.
  • the charging and discharging current limits of the battery system are then calculated for each combination of the switching states of the battery packs.
  • the calculation can be carried out by the master battery control unit.
  • the search for the combination of the switching states of the battery packs is preferably carried out using a mode signal whose priority is charging or discharging, a priority signal whose priority is maximum power or maximum energy utilization, and a predicted average discharge current.
  • the mode signal, the priority signal, and the predicted average discharge current can be provided by a control unit that is superordinate to the battery control units, such as a vehicle control unit (Vehicle Control Unit, VCU).
  • VCU Vehicle Control Unit
  • the predicted average discharge current can be calculated from the last driving cycles, for example.
  • the valid combinations of the switching states of the battery packs with the maximum charging power are sorted based on the charging current limit, and if there are several combinations of the switching states of the battery packs with the same charging power, this is used for them Combinations each form the sum of the status number of the respective battery pack and the combination with the largest sum is selected.
  • the valid combinations of the switching states of the battery packs with the maximum discharge power are sorted based on the discharge current limit, and if there are several combinations of the switching states of the battery packs with the same discharge power, for these combinations form the sum of the condition numbers of the respective battery packs and the combination with the largest sum is selected.
  • the priority signal is at maximum energy utilization or between maximum energy utilization and maximum power
  • the energy losses during discharging for all combinations of the switching states of the battery packs are calculated for discharging with the predicted average discharging current.
  • Maximum energy utilization is given, for example, when many battery packs with low internal resistance contribute to charging/discharging, i.e. are switched on. In this case, the internal resistance of the battery system is low and the losses are therefore minimal.
  • the point of maximum energy utilization can differ significantly from the point of maximum performance. For example, individual battery packs in the battery system can limit the discharge current of the battery system due to its proximity to a temperature limit. For the application in connection with a vehicle control unit, this means that, for example, when the power requirements are low, the system switches to maximum energy utilization, e.g.
  • the combination of the switching states of the battery packs is selected which at the same time, in accordance with the priority signal, provides a current which lies in a predetermined range of the predicted average discharge current.
  • the current may range from 5% to 200% of the predicted average discharge current.
  • maximum energy utilization means that the expected current is currently only 5% of the average predicted charging current.
  • maximum power means that the expected current is 200% of the average predicted charging current.
  • a new combination of the switching states of the battery packs is preferably decided as a function of the current combination of the switching states of the battery packs.
  • the decision can be made by the master battery control unit, for example.
  • the new combination of the switching states of the battery packs is only output if the resulting power and/or energy utilization of the new combination is above the current combination by a relative and an absolute tolerance.
  • the tolerances should be calibrated in such a way that the best possible energy and/or power output is achieved and the switching units are not overheated by constant switching operations.
  • the performance in the new switching state should be increased by a relative tolerance, e.g. B. by 5% ...10%, or an absolute tolerance, such. B. at least 1% of the maximum power above the current switching state.
  • the switching from the current combination of the switching states of the battery packs to the new combination is preferably carried out in a sequence such that equalizing currents outside the charging and discharging current limits of the individual battery packs are excluded. Whether and which prioritization is necessary depends on the short-term current peaks for which the switching units, the battery cells and other system components are designed, as well as on the time intervals that can occur when switching two battery packs. As a result, large equalizing currents due to non-synchronous switching of the individual battery packs can be ruled out.
  • the order is determined in a prioritization matrix whose fields are filled with prioritizations.
  • the charging and discharging current limits calculated above can be sent to the vehicle control unit for the new combination of switching states of the battery packs and are used by it to limit the maximum current.
  • a battery management system is also proposed.
  • the battery management system is set up to carry out the method according to the invention.
  • a battery system is also proposed which is set up to carry out the method according to the invention and/or which includes the battery management system according to the invention.
  • a further aspect of the invention is a vehicle which is set up to carry out the method according to the invention and/or which includes the battery management system according to the invention and/or which includes the battery system according to the invention.
  • the method proposed according to the invention makes it possible to select an optimal combination of the switching states of the battery packs connected in parallel. This optimum is calculated and the switching states of the individual battery packs are defined. Furthermore, the charging and discharging current limits for the battery system can be calculated with the method according to the invention.
  • the optimal selection of the switching states of the battery pack allows the operation for charging and discharging the batteries to be optimally selected according to the respective requirements.
  • a master/slave concept can distribute the computing tasks.
  • the battery packs which function as slave battery packs, send their status information and the charging and discharging current limits to the master battery pack, which was previously selected at random from all battery packs. Based on the status information, the master battery pack decides on the switching status of each individual slave battery pack.
  • the status information of each slave battery pack x is the known sizes of a battery model, which are updated every journal, such as 100ms.
  • the battery packs can differ in their condition (temperature, SOC, voltage level),
  • Battery packs are interconnected that have different numbers of battery cells connected in series and/or parallel, and
  • the calculation can be performed on the microcontroller of a battery management system.
  • Figure 1 is a schematic representation of a battery system that is set up to carry out the method according to the invention
  • Figure 2 shows a schematic representation of a battery model of a battery pack for calculating the equalizing currents and the charging and discharging current limits
  • Figure 3 is a schematic representation of a model of the battery system shown in Figure 1 and
  • FIG. 4 shows a schematic representation of a sequence of the method according to the invention.
  • FIG. 1 shows a schematic representation of a battery system 10 that is set up to carry out the method according to the invention.
  • the Battery system 10 includes two battery packs 2, namely a first battery pack 2a and a second battery pack 2b.
  • the first and second battery pack 2a, 2b are connected in parallel to each other.
  • the battery system 10 can also include more than two battery packs 2 which are connected in parallel to one another.
  • the first battery pack 2a in FIG. 1 includes three battery cells 4 connected in series.
  • the first battery pack 2a can also have a different number of battery cells 4, which are connected in series and/or in parallel.
  • the second battery pack 2b in FIG. 1 comprises three battery cells 4 connected in series.
  • the second battery pack 2a can also have a different number of battery cells 4 which are connected in series and/or in parallel.
  • the battery packs 2 each include a battery control unit 6 for controlling and monitoring the corresponding battery packs 2 and a switching unit 8 for switching the corresponding battery packs 2 on and off.
  • the first battery pack 2a includes a first battery control unit 6a and a first switching unit 8a.
  • the second battery pack 2b includes a second battery control unit 6b and a second switching unit 8b.
  • the first and second switching unit 8a, 8b are each controlled and monitored by the first and second battery control unit 6a, 6b.
  • the first and the second battery control unit 6a, 6b communicate with each other through a communication line 16, which can be designed, for example, as a CAN or LIN bus.
  • the battery system 10 also includes a first main switch 12 and a second main switch 14, which are used to electrically connect the battery system 10 to a consumer, not shown here, such as an on-board network of a vehicle.
  • the switching units 8 each enable a plurality of switching states of the corresponding battery pack 2, each of which is labeled with a state number.
  • the battery pack 2 can have four switching states, each of which has a state number.
  • the first switching state of battery pack 2 is "OFF", which corresponds to "switching off battery pack 2".
  • the first switching state of the battery pack 2 is identified by a state number 1.
  • the second switching state of the battery pack 2 is "charging ON”, which corresponds to "charging of the battery pack 2" or "current in charging direction permitted”.
  • the second switching state of the battery pack 2 is given a state number 2 .
  • the third switching state of the battery pack 2 is "discharging ON”, which corresponds to "discharging the battery pack 2" or "current allowed in the discharging direction”.
  • the third switching state of the battery pack 2 has a state number 3 .
  • the fourth switching state of the battery pack 2 is "charging AND discharging ON", which corresponds to "charging and discharging of the battery pack 2" or "current allowed in charging and discharging direction”.
  • the fourth switching state of the battery pack 2 has a state number 4 .
  • the combination of the switching states of the battery packs 2 can be represented by (x, y), where x corresponds to the state number of the first battery pack 2a, while y corresponds to the state number of the second battery pack 2b.
  • the switching units 8 can each be designed as a semiconductor switch, such as a MOSFET or IGBT.
  • the switching unit 8 can comprise a plurality of switches which are connected in parallel to one another in order to switch off large currents.
  • the switching unit 8 can also include two switches that are connected back-to-back in series. This back-to-back circuit allows current to flow in both the charging and discharging directions.
  • one of the battery control units 6 is selected as the master battery control unit, while the other battery control units 6 are each designated as the slave battery control unit.
  • the battery pack 2, which includes the master battery control unit, is referred to as the master battery pack, while the other battery packs 2 are each referred to as the slave battery pack.
  • the status information of the slave battery packs is transmitted from the respective slave battery control units to the master battery control unit via the communication line 16 .
  • FIG. 2 shows a schematic representation of a battery model 20 of a battery pack 2 for calculating the equalizing currents and the charging and discharging current limits.
  • the battery model 20 includes an ideal voltage source 22, an ohmic internal resistance Ri, a polarization resistance R p and a polarization capacitance C p connected in parallel to the polarization resistance R p .
  • An RC element is formed by connecting the polarization resistance R p and the polarization capacitance C p in parallel.
  • the battery model shown in FIG. 2 is also referred to as the Thevenin battery model with an RC element.
  • the battery model 20 can also include a number of RC elements connected to one another in series.
  • Ut u ocv + U Ri + U Cp
  • Ut the output voltage of the battery pack 2
  • Uocv the open circuit voltage of the ideal voltage source 22
  • URI the voltage drop across the ohmic internal resistance Ri
  • Uc P the voltage drop across the RC element.
  • FIG. 3 shows a schematic representation of a model of the battery system 10 shown in FIG. 1, in which the battery packs 2 are each replaced by a battery model 20 shown in FIG.
  • the first battery model 20a of the first battery pack 2a includes a first ideal voltage source 22a, a first ohmic internal resistance Rii, a first polarization resistance R pi and a first polarization capacitance C p i which is connected in parallel with the first polarization resistance R pi .
  • the second battery model 20b of the second battery pack 2b includes a second ideal voltage source 22b, a second ohmic internal resistance Ri2, a second polarization resistance R P 2 and a second polarization capacitance C P 2 which is connected in parallel with the second polarization resistance R P 2 .
  • FIG. 4 shows a schematic representation of a sequence 100 of the method according to the invention.
  • the sequence 100 is explained in more detail below with the aid of FIGS. 1 to 3 and the associated description.
  • the first battery control unit 6a is selected as the master battery control unit and the second battery control unit 6b is referred to as the slave battery control unit.
  • the first battery pack 2a is thus referred to as the master battery pack, while the second battery pack 2b is referred to as the slave battery pack.
  • a number N of available battery packs 2 is defined.
  • N is equal to two.
  • the status information of the second battery pack 2b is transmitted from the slave battery control unit, namely the second battery control unit 6b, to the master battery control unit, namely the first battery control unit 6a.
  • the status information includes the parameters required for further calculations, such as the no-load voltage Uocv of the ideal voltage source 22, the size of the ohmic internal resistance Ri and the voltage drop Uc P across the RC element.
  • a fourth step 104 equalizing currents for each combination (x, y) of the switching states of the first and second battery packs 2a, 2b, which flow between the first and second battery packs 2a, 2b in the case of the respective combination (x, y), based on the status information of the first and second battery pack 2a, 2b and the first battery model 20a and the second battery model 20b calculated.
  • the current li which flows through the first battery pack 2a and represents the equalizing current, is to be calculated according to the following equation: where li(4, 4) is the current li flowing through the first battery pack 2a in combination (4, 4) of the switching states of the first and second battery packs 2a, 2b Uocvi is the open circuit voltage of the first ideal voltage source 22a, Uocv2 is the open circuit voltage of the second ideal voltage source 22b, Uc Pi is the voltage drop across the RC element of the first battery pack 2a and Uc P2 is the voltage drop across the RC element of the second battery pack 2b is.
  • the current h flowing through the second battery pack 2b and representing the equalizing current is to be calculated according to the following equation:
  • h(4, 4) is the combination (4, 4) of the switching states of the first and second battery packs 2a, 2b flowing through the second battery pack 2b Current h is, Uocvi is the open circuit voltage of the first ideal voltage source 22a, Uoc 2 is the open circuit voltage of the second ideal voltage source 22b, Uc Pi is the voltage drop across the RC element of the first battery pack 2a and Uc P 2 is the voltage drop across the RC element of the second battery pack 2b.
  • charging and discharging current limits of the battery system 10 are then calculated in a fifth step 105 for each combination (x, y) of the switching states of the first and second battery packs 2a, 2b.
  • the calculation can be carried out by the master battery control unit.
  • the charging current limits lii m _cha and the discharging current limits lii m _dcha for all combinations (2, 3), (3, 2), (3, 3), (4, 2), (2 , 4), (4, 3), (3, 4) and (4, 4) are calculated.
  • the discharge current limit for the combination (2.3) is calculated as follows:
  • the first boundary condition based on the combination (2.3) allows only charging for the first battery pack 2a and only discharging for the second battery pack 2b.
  • To calculate the charging and discharging current limit the current direction and magnitude are tested at the extreme points.
  • the discharge current fedcha of the second battery pack 2b equal to the discharge current limit hiim.dcha of the second battery pack 2b is used as the second boundary condition, with the following applying:
  • the charging current licha of the first battery pack 2a equal to the charging current limit liij m _cha of the first battery pack 2a is used, with the following applying: flcha - fllim _cha
  • Ii and h can generally have positive or negative values.
  • the discharge current limit lii m _dcha in this combination (2, 3) is equal to the discharge current limit hiim.dcha of the second battery pack 2b.
  • the second battery pack 2b is not only charged by a resulting discharge current into the load, such as the vehicle, but also by the current Ii that is generated by charging the first Battery pack 2a flows.
  • the charging current limit liii m _cha the first battery pack 2a must not be exceeded. If li>0 and li ⁇ hiim.dcha apply, then connection is not permitted since the discharge current limit of the second battery pack 2b has been exceeded. The compensating current is too high and the combination is noted as not valid.
  • the above calculation is performed by varying the first constraint for all combinations with an adapted logic. For example, in the combination (3, 2), the sizes of the battery packs 2a, 2b are mutually exchanged.
  • a 2-dimensional matrix for all possible combinations of the switching states of the battery packs 2 is then registered as to whether the equalizing currents in the respective combination under all boundary conditions are present both in the charging and discharging directions for the two battery packs 2 in the area of the charging and discharge current limits.
  • a seventh step 107 the combinations of the switching states of the battery packs 2 are sorted out which lead to the charging and/or discharging current limits being breached in at least one battery pack 2 and are therefore not valid.
  • an eighth step 108 the combination of the switching states of the battery packs 2 for the maximum power or the maximum energy utilization of the battery system 10 is sought from the valid combinations from the 2-dimensional matrix.
  • a new combination of the switching states of the battery packs 2 is preferably decided as a function of the current combination of the switching states of the battery packs 2 . Switching from the current combination of the switching states of the battery packs 2 to the new combination is carried out in a sequence such that equalizing currents outside the charging and discharging current limits of the individual battery packs 2 are excluded. The order is determined in a prioritization matrix whose fields are filled with prioritizations:
  • High priorities are marked with higher entries in the prioritization matrix, for example 4 is the highest priority.
  • the first battery control unit 6a selected as the master battery control unit commands all battery packs 2 to change state. Now they will be described
  • Battery packs 2 which therefore have a state change from switching state (2) to (4) to switching state (1), if present, are activated first. Battery packs 2 that have a status change from (1) to (3) to (4) are only activated when they are in the switching status (1).

Landscapes

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

Abstract

L'invention concerne un procédé de fonctionnement d'un système de batterie (10) qui comprend de multiples blocs-batteries (2, 2a, 2b) qui sont reliés l'un à l'autre en parallèle et dont chacun possède une unité de commande de batterie (6, 6a, 6b) pour commander et surveiller le bloc-batterie correspondant (2, 2a, 2b) et une unité de commutation (8, 8a, 8b) pour commuter le bloc-batterie correspondant (2, 2a, 2b) en marche et en arrêt, chacune des unités de commutation (8 8a, 8b) permettant de multiples états de commutation du bloc-batterie correspondant (2, 2a, 2b), dont chacun est numéroté avec un nombre d'états. Le procédé comprend les étapes consistant à : - sélectionner l'une des unités de commande de batterie (6, 6a, 6b) en tant qu'unité de commande de batterie principale tandis que chacune des autres unités de commande de batterie (6, 6a, 6b) est désignée en tant qu'unité de commande de batterie esclave ; déterminer le nombre N de blocs-batteries disponibles (2, 2a, 2b) ; - transmettre des informations d'état de chaque bloc-batterie (2, 2a, 2b) à l'unité de commande de batterie maître ; - calculer des courants d'égalisation pour chaque combinaison d'états de commutation des blocs-batteries (2, 2a, 2b), lesdits courants d'égalisation circulant entre les blocs-batteries (2, 2a, 2b) dans chaque combinaison, sur la base des informations d'état et d'un modèle pour le système de batterie (10), ledit modèle étant composé des modèles de batterie (20, 20a, 20b) de chaque bloc-batterie (2, 2a, 2b) ; - calculer des seuils de charge et de décharge du système de batterie (10) pour chaque combinaison d'états de commutation des blocs-batteries (2, 2a, 2b) sur la base des informations d'état et du modèle de batterie (20, 20a, 20b) de chaque bloc-batterie (2, 2a, 2b) ; - pour toutes les combinaisons possibles d'états de commutation des blocs-batteries (2, 2a, 2b), enregistrer dans une matrice à N dimensions si les courants d'égalisation se situent dans la plage des seuils de charge et de décharge des blocs-batteries (2, 2a, 2b) à la fois dans la direction de charge et de décharge pour tous les blocs-batteries (2, 2a 2b) dans chaque combinaison dans toutes les conditions limites ; - éliminer les combinaisons d'états de commutation des blocs-batteries (2, 2a, 2b) qui conduisent à une violation des seuils de charge et/ou de décharge dans au moins un bloc-batterie (2, 2a, 2b) et qui ne sont donc pas valides ; et - parmi les combinaisons valides dans la matrice N-dimensionnelle, identifier la combinaison d'états de commutation des blocs-batteries (2, 2a, 2b) qui atteint la performance maximale ou l'utilisation d'énergie maximale du système de batterie (10).
PCT/EP2022/071029 2021-10-26 2022-07-27 Procédé de fonctionnement de système de batterie, et système de batterie WO2023072444A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280072151.0A CN118159445A (zh) 2021-10-26 2022-07-27 用于运行电池系统的方法、电池系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021212023.7A DE102021212023A1 (de) 2021-10-26 2021-10-26 Verfahren zum Betreiben eines Batteriesystems, Batteriesystem
DE102021212023.7 2021-10-26

Publications (1)

Publication Number Publication Date
WO2023072444A1 true WO2023072444A1 (fr) 2023-05-04

Family

ID=83006203

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/071029 WO2023072444A1 (fr) 2021-10-26 2022-07-27 Procédé de fonctionnement de système de batterie, et système de batterie

Country Status (4)

Country Link
CN (1) CN118159445A (fr)
DE (1) DE102021212023A1 (fr)
TW (1) TW202329576A (fr)
WO (1) WO2023072444A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656915A (en) * 1995-08-28 1997-08-12 Eaves; Stephen S. Multicell battery pack bilateral power distribution unit with individual cell monitoring and control
US20160049813A1 (en) 2013-03-28 2016-02-18 Sony Corporation Power storage device, power storage system, and control method of power storage device
US20190103750A1 (en) 2014-03-17 2019-04-04 GLX Power Systems Inc. Method and apparatus for creating a dynamically reconfigurable energy storage device
US20210226267A1 (en) * 2018-10-26 2021-07-22 Pramod Suresh Magadi BATTERY CHARGING AND DISCHARGING OF MULTIPLE PACKS AT DIFFERENT STATES OF CHARGE (SOCs)
WO2021209643A1 (fr) * 2020-04-17 2021-10-21 Blixt Tech Ab Système de tension configurable pour consommateur d'énergie ou source d'énergie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656915A (en) * 1995-08-28 1997-08-12 Eaves; Stephen S. Multicell battery pack bilateral power distribution unit with individual cell monitoring and control
US20160049813A1 (en) 2013-03-28 2016-02-18 Sony Corporation Power storage device, power storage system, and control method of power storage device
US20190103750A1 (en) 2014-03-17 2019-04-04 GLX Power Systems Inc. Method and apparatus for creating a dynamically reconfigurable energy storage device
US20210226267A1 (en) * 2018-10-26 2021-07-22 Pramod Suresh Magadi BATTERY CHARGING AND DISCHARGING OF MULTIPLE PACKS AT DIFFERENT STATES OF CHARGE (SOCs)
WO2021209643A1 (fr) * 2020-04-17 2021-10-21 Blixt Tech Ab Système de tension configurable pour consommateur d'énergie ou source d'énergie

Also Published As

Publication number Publication date
CN118159445A (zh) 2024-06-07
DE102021212023A1 (de) 2023-04-27
TW202329576A (zh) 2023-07-16

Similar Documents

Publication Publication Date Title
DE102011002548B4 (de) Verfahren zur Steuerung einer Batterie und Batterie zur Ausführung des Verfahrens
EP2705564B1 (fr) Procédé de commande d'une batterie et batterie pour la mise en oeuvre du procédé
EP3274217A1 (fr) Dispositif accumulateur d'énergie
DE102010009260A1 (de) Einrichtung zur Versorgung eines Bordnetzes
DE102017123458A1 (de) Autonomes Verschalten einer Antriebsbatterie
DE102014212933B3 (de) Vorrichtung und Verfahren zum Ladezustandsausgleich für ein Batteriesystem
EP4052321B1 (fr) Procédé pour charger et/ou décharger un accumulateur d'énergie rechargeable
EP4286215A1 (fr) Technique de connexion variable d'un système d'accumulation d'énergie de traction
DE102019201606A1 (de) Verfahren zum elektrischen Vorladen eines Zwischenkreiskondensators im Hochvoltsystem eines zumindest teilweise elektrisch angetriebenen Kraftfahrzeugs sowie ein derartiges Hochvoltsystem
WO2004006422A1 (fr) Reseau de bord de vehicule automobile
EP3173280B1 (fr) Batterie, véhicule comprenant une telle batterie et utilisation d'une telle batterie
DE102020206520A1 (de) Verfahren zum Betreiben eines Batteriesystems
DE102012003023A1 (de) Energieversorgungseinheit zur Energieversorgung eines Fahrzeugs
DE102013214421A1 (de) Verfahren zum Koppeln zumindest einer sekundären Energiequelle an ein Energieversorgungsnetzwerk , insbesondere Fahrzeug-Bordnetz
DE102018001301B4 (de) Bordnetz für ein Kraftfahrzeug
WO2017050404A1 (fr) Prévision d'une chute de tension dans un véhicule automobile
WO2023072444A1 (fr) Procédé de fonctionnement de système de batterie, et système de batterie
DE102010017439A1 (de) Schaltungsanordnung und Verfahren zum Ausgleich von unterschiedlichen Ladezuständen von Zellen eines Energiespeichers
DE102020204336B4 (de) Fahrzeugseitige Hochvolt-Ladeschaltung und Fahrzeugbordnetz
EP3470259B1 (fr) Système d'accumulateurs d'énergie doté d'une pluralité d'accumulateurs d'énergie couplés en parallèle et procédé de fonctionnement d'un système d'accumulateurs d'énergie
CH715078A2 (de) Elektronische Schaltung zum Durchführen eines Ladezustandsausgleichs zwischen Batteriezellen eines Batteriesystems.
DE102021101600A1 (de) Bordnetz für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Betrieb eines Bordnetzes
DE102021101601A1 (de) Bordnetz für ein Kraftfahrzeug und Kraftfahrzeug
DE102020004741A1 (de) Elektrisches Bordnetz für ein zumindest teilweise elektrisch betriebenes Kraftfahrzeug, sowie Kraftfahrzeug
DE102019203517A1 (de) Verfahren zur Energieversorgung von Verbrauchern eines Bordnetzes für ein Fahrzeug, sowie ein Bordnetz für ein Fahrzeug

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22757917

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280072151.0

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE