EP3275068A1 - Système de batterie et procédé de fonctionnement d'un système de batterie - Google Patents

Système de batterie et procédé de fonctionnement d'un système de batterie

Info

Publication number
EP3275068A1
EP3275068A1 EP16701294.7A EP16701294A EP3275068A1 EP 3275068 A1 EP3275068 A1 EP 3275068A1 EP 16701294 A EP16701294 A EP 16701294A EP 3275068 A1 EP3275068 A1 EP 3275068A1
Authority
EP
European Patent Office
Prior art keywords
battery
operating
operating parameter
battery system
voltage
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.)
Withdrawn
Application number
EP16701294.7A
Other languages
German (de)
English (en)
Inventor
Ulrich Lange
Andre Boehm
Michael ERDEN
Thomas Dufaux
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.)
Robert Bosch GmbH
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 EP3275068A1 publication Critical patent/EP3275068A1/fr
Withdrawn legal-status Critical Current

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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or 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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • 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
    • 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
    • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • 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
    • 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
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/00306—Overdischarge protection
    • 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 present invention relates to a battery system and a method for operating a battery system, in which an improved capacity is made possible with simultaneously high security of the battery.
  • lithium-ion batteries are indispensable in today's life. Areas of application include fully electrically powered vehicles or hybrid vehicles, as well as electrical tools, electrical entertainment electronics, computers, mobile phones, and other applications.
  • Charging current is detected.
  • Adapt aging state From the document EP 0 508 720 AI a control circuit for controlling the charging of a battery is also known.
  • the control circuit is used as input of the internal resistance of the battery, which is compared with a reference value to determine the state of charge.
  • Document EP 2 680 392 A1 describes a method for recharging a battery.
  • the capacity of the battery should be increased without exceeding a charging threshold. This is to be achieved according to this document by repeated charging of the battery during a charging cycle.
  • the subject of the present invention is a method for operating a battery system, wherein the battery system comprises a battery which can be operated with an operating parameter, the method having the method steps:
  • At least one of the duration of the operation of the battery with the predefined size of the operating parameter and the size of the operating parameter is selected based on a
  • the load criterion for determining a future predetermined aging curve of the battery is determined, the aging curve is based on a load of the battery by the operating parameter.
  • Battery system includes a battery that is operable with an operating parameter.
  • the method is based on operating batteries in a conventional manner with respect to an operating parameter, such as with respect to the voltage provided by the battery, to the current flowing through the battery, and to the temperature of the battery, within values described above
  • Operating limits are.
  • a battery includes rigid operating limits.
  • these operating limits include a safety threshold, from which on depending on the size and duration of the value of the respective operating parameter
  • Security measures should be taken, since when exceeding the safety threshold and thus when operating the battery in the critical operating condition may be a security impairment.
  • a standard operating threshold may be provided which is arranged at a distance from the safety threshold, the area below the standard operating threshold being the standard operating range, the range between Normal operating threshold and safety threshold is the safety operating range and the area above the safety threshold is the critical operating condition.
  • the standard operating threshold can conventionally determine the magnitude of the value of the operating parameter, within which the battery can in principle be operated particularly advantageously with respect to the operating parameter, and can be preferred by the manufacturer of the battery
  • Operating limit be set.
  • the battery can be operated on the one hand without safety concerns, as this operating threshold is spaced from the safety threshold, and about below this example, with respect to the amount of the value of the operating parameter.
  • the provision of the standard operating threshold can fulfill the task that operating the battery in the frame of the standard operating threshold or in the normal operating range can also make it possible in the long term for the load on the battery to increase Operation is limited to a predefinable value. For example, the life of the battery can meet a predetermined optimal condition because the standard operating threshold may allow operation of the battery in a particularly gentle state.
  • Safety measures can be omitted in the event that only a short-term exceeding of the standard operating threshold occurs. In such a case, usually a further operation without a security hazard may be possible, whereby security measures are not required.
  • the defined provision of standard operating threshold and safety threshold basically allow a particularly gentle and reliable operation of the battery or the battery system.
  • the method comprises the method steps:
  • At least one of the duration of the operation of the battery with the predefined size of the operating parameter and the size of the operating parameter is selected based on a
  • the load criterion for determining a future predetermined aging curve of the battery is determined, the aging curve is based on a load of the battery by the operating parameter.
  • the method is thus based on the fact that in particular when the
  • Safety threshold is not exceeded, there are no security impairments but only the load of the battery can be controlled increases. As a result, in particular the impairment of the battery is increased, but this can often be accepted. In particular, a
  • Impairment of the battery may include future aging, so that the operating parameter or its size and the duration of the
  • the method can be designed in such a way or the battery system can be designed such that defined requirements for the life of the battery and thus for a future aging process can be fulfilled if the limits with respect to duration and strength of the
  • An aging of the battery for example due to an increased battery voltage, can be caused, for example, by the occurrence of side reactions, which can in particular irreversibly consume active material.
  • a lithium battery for example, lithium or a lithium species may be consumed.
  • a load criterion can be used.
  • Stress criterion can be based in particular on a load of the battery by the operating parameters, which is used and regulated according to the invention.
  • the method does not include adjusting the parameter based on, for example, during manufacture or start-up
  • This load criterion can be found in the software of a control unit of the
  • Battery system such as in the battery management system, be deposited or be used and serve, for example, by increasing the load or by increasing the
  • An exemplary stress criterion S as a function of ampere-hours [Ah] may serve to promote aging at both very high and low voltages, and thus substantially throughout the voltage range describe the battery in which significant side reactions occur.
  • the loading criterion S may be approximately as follows:
  • the capacity loss may be obtained as a temporal integral over the amount of function I S R or side reactions, particularly in very high or low voltage regions, consuming active material, such as lithium.
  • the value I S R is composed of the sum of all side reactions in a switched-off battery or during a suspension of the battery ⁇ ⁇ / ⁇ " ⁇ and the sum of all side reactions in a switched-on battery, which is thus charged or discharged
  • the first factor can thus describe the side reactions during parking of the vehicle, whereas the second factor is about the side reactions during running of the vehicle, and thus charging or discharge of the battery can describe.
  • Threshold of the voltage at which the side reactions considered occur significantly it is assumed that the side reactions investigated, for example, in a middle
  • Proportionality factor which can change, for example over the lifetime, k
  • U is the currently applied battery voltage
  • Ui the voltage threshold of the side reaction.
  • the side reaction is proportional to Fi to the impressed current I, where Fi can change over the lifetime, for example.
  • control unit such as the battery management system
  • K t , U t and l t describe the sleep state of the battery
  • , Ui and Fi describe the operation of the battery.
  • I S R determinable from the predetermined parameters is, as already described, the sum of all side reactions and is integrated as an absolute value over the drive cycle; it corresponds to the capacity loss due to the secondary reactions. From the above, it can be seen that the possibly occurring loads and the associated increased aging can be controlled or determined according to the invention by b) at least one of the duration of the operation of the battery with the
  • Operating parameters is selected based on a load criterion, wherein according to method step c) the load criterion for maintaining a future predetermined aging curve of the battery is determined, the aging curve on a load of the battery by the
  • a constant used standard threshold not to have at least temporarily present but to adjust the setting of the parameters dynamically based on a predetermined and desired future aging. This allows easy achievement of aging goals. In the event that a constant normal operating range is still present, this can be left in a predefined and desired manner with respect to the operating parameter, wherein preferably the size of the parameter in the safety operating range and the duration in which the parameter in the safety operating range a particular size, are controlled in a predefined way.
  • aging may be in an acceptable range and may also be predictable.
  • the usable operating range of the operating parameter can thus be increased, at least to a limited extent, in a defined and controlled manner, without having to fear unpredictable and unwanted influences on the battery and associated disadvantages.
  • the above-described method therefore makes use of the fact that, by exceeding the standard operating threshold or by removing a constant standard operating threshold, the performance of the battery can be significantly increased compared to a permanent operation within the originally set standard operating threshold, without having to accept a loss of security or significant limitations.
  • the method may further
  • the above-described method can easily and surely increase the performance of the battery such as the capacity of the battery.
  • Operating parameter is selected from the group consisting of voltage, current and temperature.
  • the aforementioned operating parameters ie the voltage provided by the battery, the current flowing through the battery and a temperature of the battery may allow a significant increase in the performance of the battery to be made possible by a corresponding increase in this operating parameter. This becomes apparent for example, using the voltage of the battery as
  • the method takes place during a charging of the battery.
  • the voltage can be increased in a defined manner, so that, for example, the charging threshold or state of charge threshold can be increased in a defined manner on the basis of a desired future aging process.
  • This configuration may be of particular advantage, since in a charging process with increasing state of charge even at a relatively small increase in the state of charge or the voltage of the battery, a comparatively large increase in the capacity of the battery can be made possible. Thus, especially when the method is at least partially, in particular completely, carried out during a charging process, a significant increase in the capacity and thus the performance of the battery can be generated.
  • the loading criterion is determined during the operation of the battery. Determining the load criterion during the operation of the battery may mean that the
  • Loading criterion is determined during charging or discharging the battery.
  • the load criterion can be determined online, ie immediately during operation. As a result, this can always be based on current values, which can make determining the load criterion particularly exact. As a result, compliance with a desired course of aging, for example, can be made particularly safe and precise. In this embodiment, therefore, be determined Quantities, such as current or voltage, determined immediately during operation of the battery.
  • the load criterion based on a stored history of the operating parameter, in particular at a
  • Resting phase of the battery is determined.
  • only the corresponding operating parameter or operating parameters such as current and / or voltage, may be recorded.
  • the computing power of the battery management system can be chosen particularly low during operation of the battery.
  • the load criterion can be determined under
  • This threshold may be, for example, the limit Ui or U t , from which a side reaction begins significantly.
  • the threshold can be chosen such that only from this threshold an increased aging occurs.
  • Such a value may be, for example, 4.1 to 4.2V. Up to this threshold, the battery can be operated easily and still meet their aging goals. Thus, considering only the values above the threshold may be sufficient, since the corresponding values below the threshold in determining the aging are only of minor relevance and thus their inclusion does not or not significantly affect the result. By concentrating on the aforementioned relevant values, however, can to a great extent
  • Computing capacity can be saved, for example, the battery management system, so that a determination of the load criterion online, so while operating the battery, can be easily possible.
  • these operating parameters can be stored, for example, in a two-dimensional histogram. This may be particularly advantageous if, as explained above, two approximately contiguous operating parameters, such as the current and the voltage, are equally stored.
  • a determination of the stress criterion may be made as follows:
  • I l B ins corresponds to the resolution of the determined measuring points, for example of current and voltage, in the histogram.
  • Time integral and the sum of the measuring points of the histogram is the form of the load criterion:
  • the aforementioned preferred examples relate in particular to determining the load criterion and thus, for example, the aging curve on the basis of the voltage as the operating parameter.
  • determining the load criterion or other suitable operating parameters include, for example, the temperature, the current intensity or jumps or strokes of the state of charge (SOC strokes) during operation of the battery, such as in a drive cycle of an electrically driven vehicle.
  • SOC strokes state of charge
  • Such parameters can adversely affect the electrode material, such as by phase transitions. For example, an increased current strength leads to an increased temperature, SOC strokes lead to a swelling and swelling of the electrodes and thus to material wear.
  • I T is again the no-load current
  • k t is the temperature dependence of the side reaction or the aging effects
  • T t is the threshold value of the temperature at which the secondary reactions or the
  • the above-described method can include a large part of the factors that cause aging of the battery.
  • the quality of the control may still allow reliable operation of the battery, even if the unobserved parameters, such as calendar aging or other neglected factors, account for up to 70% of the total aging.
  • Operating parameters is selected depending on a control period.
  • the size can be selected for a short-term control that applies, for example, for some charging cycles, such as five charging cycles, and also for a long-term control that applies, for example, to more than ten charging cycles.
  • a long-term control can be made possible, which regulates a permanent operation of the battery and also a
  • Short-term control by which the performance can be increased even more briefly.
  • the long-term control one
  • the subject matter of the present invention is furthermore a battery system, comprising at least one battery and a control unit for regulating the battery.
  • the battery system is characterized in that the control unit is designed to carry out a method as described in detail above.
  • the battery system may include a battery or a plurality of batteries, such as a plurality of battery cells.
  • the batteries may include a battery or a plurality of batteries, such as a plurality of battery cells.
  • the battery or batteries can be connected to a battery module, for example, in order to enable the desired specification.
  • the battery or batteries may be lithium batteries, such as lithium-ion batteries.
  • the battery system is arranged in an at least partially electrically driven vehicle.
  • the battery system has, in addition to the battery, a control unit which can regulate the operation of the battery and thus has at least one control circuit.
  • a control unit which can regulate the operation of the battery and thus has at least one control circuit.
  • appropriate sensors may be provided to detect, for example, the temperature of the battery, the voltage provided by the battery or the current flowing through the battery.
  • a control unit which can regulate the operation of the battery and thus has at least one control circuit.
  • appropriate sensors may be provided to detect, for example, the temperature of the battery, the voltage provided by the battery or the current flowing through the battery.
  • a control unit which can regulate the operation of the battery and thus has at least one control circuit.
  • appropriate sensors may be provided to detect, for example, the temperature of the battery, the voltage provided by the battery or the current flowing through the battery.
  • a control unit which can regulate the operation of the battery and thus has at least one control circuit.
  • appropriate sensors may be provided to detect, for example, the temperature of the battery, the voltage provided by the battery or the current flowing through the
  • Arithmetic unit determines based on the detected operating parameters, whether a control intervention is necessary or how the
  • Operating parameters should be set to realize a desired specification, such as a desired aging process.
  • control unit has at least a first control loop and a second control loop nested with the first control loop.
  • a particularly effective regulation of the battery is made in particular with reference to a method as described in detail above.
  • the first control loop is formed to at least one controlled variable to achieve a predetermined
  • the second control loop is designed to at least one controlled variable to achieve a predetermined
  • a desired value of the first control loop is selectable and / or that a desired value of the second control loop is based on a controlled variable output by the first control loop.
  • a prescribed control structure can enable the battery to be controlled in a particularly effective and secure manner, in which case the battery can be safely controlled or carried out, for example
  • a rule with respect to a load can be nested with a control with regard to a desired aging process.
  • a control with regard to a desired aging process in particular by providing two nested
  • Control circuits as explained above, it is possible that by entering a desired aging curve in the first control loop this outputs a controlled variable, which serves as an input of the second control loop. Based on this input, the second control loop can regulate the battery to a desired load, in particular if a load criterion can be determined based, inter alia, on the controlled variable of the first control loop.
  • the control unit can operate by a simple input of a target aging, the battery with a defined load in order to meet the desired aging can.
  • Fig. 1 is a schematic view of different operating conditions of a
  • FIG. 2 is a schematic view of a voltage waveform of a battery over time
  • Fig. 3 is a schematic view of another voltage waveform of a
  • Fig. 4 is a schematic view of another voltage waveform of a
  • Fig. 5 is a diagram showing, by way of example, the regulation of a battery
  • Fig. 6 is a schematic view of a control structure
  • FIG. 7 shows, by way of example, determining a load criterion based on a
  • Fig. 8 is a schematic example of the regulation of a battery over a plurality of charging cycles.
  • Battery voltage U shown on the Y-axis The include
  • Safety Operating Area 12 and a critical operating area 14 It is further shown that a standard operating threshold 16 separates the standard operating area 10 and the safety operating area 12 and that a safety threshold 18 separates the safety operating area 12 and the critical operating area 14.
  • the standard operating range 10 is such an operating range in which the battery is operated such that both a particularly high level of security is given and other predetermined requirements can be met, such as cell capacity, energy content, charge / discharge power, and
  • EOL criteria End-of-life or end-of-life criteria
  • the critical operating range 14 is still one in which
  • Countermeasures are taken, so at least one measure is initiated to counteract an incoming error case.
  • the safety operating area 12 is also one in which further ensures safe operation of the battery is such that no
  • Normal operating threshold 16 can be accepted without the immediate
  • Countermeasures must be initiated, which may not be necessary during a desired operation. This may occur, for example, unintentionally during an operating operation of the battery for a short time, or this may for a predetermined duration and in a
  • FIG. 2 schematically shows the time t on the x-axis and the voltage U on the y-axis. Furthermore, the curve 20 shows the voltage applied to the battery
  • a predetermined charging limit 22 is shown, as well the standard operating threshold 16, which limits the standard operating range 10, and may for example lie slightly above the charging limit 22, for example within a range of 5 mV, and the safety threshold 18, from which approximately the critical operating range 14 can be present and below which approximately the safety operating range 12 is present can.
  • the areas ti may indicate a charging operation
  • t 2 may be a discharging operation, such as during operation of an electrically driven vehicle
  • 3 may be a recuperation operation. It can be seen that it is often impossible to prevent the voltage, for instance during charging or during a charging process
  • an assessment can be made of the extent to which operation of the battery in the safety operating area 12 can be accepted, in particular assessing the strength of the operating parameter, such as the voltage, and the corresponding duration of the operation in the safety operating area 12 Figure 3 shown.
  • FIG. 3 shows the time t on the x-axis and the voltage U on the y-axis. Furthermore, the curve 20 again shows the voltage applied to the battery. Furthermore, a predetermined charging limit 22 is shown, which in this embodiment corresponds to the standard operating threshold 16, which limits the standard operating range 10, and the safety threshold 18, from which approximately the critical operating range 14 can be present and below which approximately the safety operating range 12 can be present.
  • the ranges and I4 t 5 show a relatively small period of time of exceeding the normal operation threshold 16, such as in a period of 300ms (I4), and 500ms (t 5). Furthermore, with respect to the time duration, the time periods t 6 correspond to the period I 4 and the time period t 7 to the time period t 5 . With respect to magnitude of the voltage in the period of operating the battery in the Safety operating range 12 can be seen that during the periods t 6 and t 7 is a significantly greater voltage than at 1 ⁇ and tj.
  • Safety area 12 be sufficient. However, this may lead to results of a comparatively low quality, since a time concentration t 5 and t 7 would be regarded as critical, whereas a pure consideration of the strength would be considered critical
  • Periods t 6 and t 7 would be considered critical.
  • X err is an error integral and U mea s the measured or occurred voltage and ⁇ ⁇ the voltage threshold corresponding to the standard operating threshold 16. This can lead to the following values for the respective periods and voltages purely by way of example: X err for t 4 is 3mVs, Xerr for t 5 is 5mVs, X err for t 6 is 15mVs and X err for t 7 is 25mVs. Based on this data, an accurate and reliable estimation of, for example, the negative influence of the battery can be made possible.
  • a quadratic weighting can be done:
  • Xerr for t 4 is 30 ⁇ ⁇ / 2 8
  • X err for t 5 is 50 ⁇ ⁇ / 2 8
  • X err for t 6 is 750 ⁇ ⁇ / 2 8
  • Xerr for t 7 is 1250 ⁇ 2 8.
  • the square weighting of the voltages has the advantage that a particularly defined operation of the battery can be made possible.
  • Operating parameters can be arranged below the danger level 0 according to EUCAR and the safety threshold 18 can also correspond approximately to the limit of the danger level 0 according to EUCAR. These thresholds are often determined by the manufacturer and are in a tax or
  • Control unit such as deposited in the battery management system.
  • these thresholds are generally valid and thus predetermined equally for all driving states or applications, in order to enable a safe and generally balanced operation of the battery in relation to all operating states.
  • Safety operating area 12 is shifted. It will be apparent to those skilled in the art that a standard operating threshold 16 may still be present, but need not necessarily be present, that is, can be regarded as an imaginary threshold in the following. This can be increased by achieving an increased voltage despite a safe operation of the battery
  • Capacity can be achieved, in particular by a long-term control, the voltage is in a defined manner in the safety operating range and not mainly, as shown in Figure 2, in the
  • Standard operating range 10 This may be particularly advantageous because at comparatively small increases in voltage, a comparatively large improvement in capacity is possible.
  • Figure 5 shows in detail in the upper diagram schematically a mission of the life of the battery on the axis Xi and on the axis Yi a load on the battery.
  • Figure 5 shows in detail in the upper diagram schematically a mission of the life of the battery on the axis Xi and on the axis Yi a load on the battery.
  • the lower diagram is schematically an order of
  • the curve 24 shows a concrete load on the battery
  • the curve 26 shows a desired limit of the load of the battery
  • the curve 28 shows a concrete operational parameter, such as the voltage
  • the line 30 shows a desired threshold of the operating parameter, such as about the standard operating threshold 16.
  • the sections I to VI should specify different time intervals.
  • a preferred but purely exemplary control structure 32 for performing regulation based on, for example, a battery load is further shown in FIG.
  • the control structure 32 is in particular part of a control unit of a battery system.
  • the control structure 32 in FIG. 6 is in particular part of a
  • control structure 32 such as the battery management system.
  • the control structure 32 according to FIG. 6 or the control relationship or control unit can be connected to the battery via connections, not shown, in order thus to effect a control intervention based on the principles described in US Pat
  • Rule structure 32 ejected controlled variables to perform.
  • control structure 32 comprises a first control loop 35 and a second control loop 37 interleaved with the first control loop 35, as will be seen below.
  • first control loop 35 is designed to be at least one controlled variable to achieve a predetermined
  • Aging history output and the second control circuit 37 is further formed to at least one controlled variable to achieve a
  • a desired value of the first control loop 35 is selectable and based on a target value of the second Control circuit 37 on one of the first control loop 35 output controlled variable.
  • control structure 32 or the interleaving of the control circuits 35, 37 will be described below.
  • the function block 36 there is the target SOHc which should be present based on a desired aging history.
  • This is routed to a function block 40, which is likewise supplied with a currently present SOHc.
  • the currently present SOHc can be determined by the function block 38 and routed to the function block 40.
  • the currently present SOHc can be determined in a manner understandable to a person skilled in the art on the basis of measured voltage values during a charging cycle, for example.
  • a transformation block 42 such as a PID controller, which can output a control variable as output 44 by defining a desired controlled system in a manner known per se and easily implementable in the control technology.
  • a controlled variable for example, a target load for the battery can be output to thereby adjust the aging by adjusting the stress.
  • the desired stress is in turn directed to a function block 46, in which the target stress with a currently existing stress is compared.
  • the present stress can be found in the
  • Function block 48 are determined and routed to the function block 46.
  • Figure 7 shows an example of determining a stress criterion during operation of the battery. In detail, a two-dimensional histogram is shown in the upper diagram of Figure 7, in which the
  • Voltage is indicated in particular as the upper voltage limit on the X-axis and wherein the current flowing through the battery is indicated on the Y-axis.
  • the scale N also shows the number of occurrences of the corresponding ones
  • Such a history of operating parameters may occur during operation of the battery, for example. By way of example, this can be realized during a travel time of an electrically driven vehicle of about 10 hours.
  • a change of the voltage value leads to a shift of the histogram, since the current is multiplied by the factor e (U "U (l)) .
  • transformation block 50 such as a PI D controller. This can be optionally applied with additional limits as upper and lower limits of the values to be controlled.
  • output 52 again a
  • Control variable output which is about an operating parameter, such as
  • current, voltage or temperature can be to thereby adjust the stress on the setpoint, as is possible in the control technology in a known and easily implementable way by defining a desired controlled system.
  • the controlled variable can be from the output 52 are directed approximately in a memory 54. Regardless of the provision of the memory 54, the controlled variable can be passed into the function blocks 38, 48.
  • the function block 38 in turn, the currently present SOHc can be determined, and in the function block 48, the currently existing stress can be determined.
  • the operating principle is thus based on setting a target load or setpoint load for the battery, by means of which a defined aging process of the battery can be made possible.
  • a prerequisite for this is the definition of a suitable, measurable stress value, which accumulates over time and which, according to this embodiment, is based on the desired aging process.
  • the above regulation serves in particular a long-term regulation. It may further be provided that the outputs 44, 52 with respect to a
  • Short-term control can be varied, the thresholds are thus increased briefly. For this purpose, further setpoints 43, 53 are processed.
  • FIG. 8 shows an example of a regulation of a battery according to the invention.
  • the number of charging cycles are plotted, whereas on the axis Y1 the SOHc is plotted, on the axis Y 2 a voltage threshold in volts is given, which is based on the control according to the invention , and wherein on the axes Y 3 and Y 4, the aging or the SOH loss per charge cycle is plotted.
  • the line 58 shows the setpoint value of the aging and the curve 60 shows the determined value of the aging. It can be seen in the upper diagram that at approximately 400 charge cycles one
  • the voltage set by the control can be recognized by the curve 62. It is shown that the controller settles in the first cycles on a regulated cell voltage as the upper limit.
  • the height of the baseline shows a long-term control, whereas the peaks show a short-term control. Due to the short-time control, a higher voltage level can be reached for a short time, which can be increased by 100mV, for example.
  • the curve 64 shows the aging
  • the curve 66 the target load or the

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

Abstract

L'invention concerne un procédé de fonctionnement d'un système de batterie comprenant une batterie qui peut fonctionner avec un paramètre de fonctionnement. Ledit procédé comprend les étapes suivantes : a) le fonctionnement défini de la batterie avec une grandeur prédéfinie du paramètre de fonctionnement de manière que b) la durée de fonctionnement de la batterie avec la grandeur prédéfinie du paramètre de fonctionnement et/ou la grandeur du paramètre de fonctionnement est sélectionnée sur la base d'un critère de charge, c) le critère de fonctionnement étant déterminé pour respecter une courbe de vieillissement prédéterminée future de la batterie qui est basée sur une charge de la batterie par le paramètre de fonctionnement. Le procédé prescrit permet le fonctionnement d'une batterie avec un rendement particulièrement élevé, par exemple avec une capacité particulièrement élevée tout en ayant un fonctionnement sûr.
EP16701294.7A 2015-03-24 2016-01-21 Système de batterie et procédé de fonctionnement d'un système de batterie Withdrawn EP3275068A1 (fr)

Applications Claiming Priority (2)

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DE102015205252.4A DE102015205252A1 (de) 2015-03-24 2015-03-24 Batteriesystem und Verfahren zum Betreiben eines Batteriesystems
PCT/EP2016/051216 WO2016150584A1 (fr) 2015-03-24 2016-01-21 Système de batterie et procédé de fonctionnement d'un système de batterie

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EP (1) EP3275068A1 (fr)
CN (1) CN107408830A (fr)
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WO (1) WO2016150584A1 (fr)

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CN113242976A (zh) * 2018-10-01 2021-08-10 大众汽车股份公司 用于监测电子系统的可靠性的方法和装置
DE102018221721A1 (de) 2018-12-14 2020-06-18 Audi Ag Verfahren zum Betreiben einer Hochvoltbatterie, Steuereinrichtung und Kraftfahrzeug
CN114295998A (zh) * 2021-12-28 2022-04-08 东软睿驰汽车技术（沈阳）有限公司 动力电池寿命的预测方法、装置、设备及存储介质

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GB9107481D0 (en) 1991-04-09 1991-05-22 Yang Tai Her A close-loop controlled charging device with reference battery saturation status
WO2001041281A1 (fr) * 1999-12-02 2001-06-07 Snap-On Technologies, Inc. Systeme de maintien de charge destine a un accumulateur au plomb-acide
CN100498364C (zh) * 2002-09-24 2009-06-10 捷讯研究有限公司 电池容量估计的系统和方法
ITMC20080094A1 (it) 2008-05-27 2008-08-26 Faam S P A Sistema sinergico tra carica batteria e batteria.
DE102008037193A1 (de) * 2008-08-11 2010-02-18 Endress + Hauser Process Solutions Ag Verfahren zur Überwachung der Reststandzeit einer Batterie
US20110049977A1 (en) * 2009-09-01 2011-03-03 Boston-Power, Inc. Safety and performance optimized controls for large scale electric vehicle battery systems
US8368355B2 (en) * 2010-04-14 2013-02-05 Apple Inc. Portable electronic device power manager with current limit feedback control loop modification for stabilizing an external power supply
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JPWO2012091077A1 (ja) * 2010-12-28 2014-06-05 三洋電機株式会社 電池の劣化度の検出方法
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DE102011080638A1 (de) * 2011-08-09 2013-02-14 Robert Bosch Gmbh Verfahren zur Bestimmung eines Zustandes einer Batterie, Batterie mit einem Modul zur Bestimmung eines Zustandes der Batterie sowie ein Kraftfahrzeug mit einer entsprechenden Batterie
JP2014011826A (ja) 2012-06-28 2014-01-20 Nissan Motor Co Ltd 車両のバッテリ充電状態制御装置
EP2680392A1 (fr) 2012-06-28 2014-01-01 BlackBerry Limited Charge maximisée de capacité de batterie sur la base d'une charge d'impulsions
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CN103997091B (zh) * 2014-05-23 2016-02-24 国家电网公司 一种规模化电动汽车智能充电控制方法

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WO2016150584A1 (fr) 2016-09-29
DE102015205252A1 (de) 2016-09-29
CN107408830A (zh) 2017-11-28

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