CN116685488A - State monitoring for service battery of vehicle with electric power assembly - Google Patents
State monitoring for service battery of vehicle with electric power assembly Download PDFInfo
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- CN116685488A CN116685488A CN202180089675.6A CN202180089675A CN116685488A CN 116685488 A CN116685488 A CN 116685488A CN 202180089675 A CN202180089675 A CN 202180089675A CN 116685488 A CN116685488 A CN 116685488A
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- 238000012544 monitoring process Methods 0.000 title claims description 26
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000012806 monitoring device Methods 0.000 claims abstract description 39
- 239000008186 active pharmaceutical agent Substances 0.000 claims abstract description 21
- 230000001960 triggered effect Effects 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000011194 good manufacturing practice Methods 0.000 description 16
- 230000006870 function Effects 0.000 description 6
- 239000013589 supplement Substances 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006677 Appel reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 238000007493 shaping process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- 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
- B60L1/00—Supplying electric power to auxiliary equipment of 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
-
- 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]
-
- 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
- B60L58/20—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 different nominal voltages
-
- 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
- B60L2250/00—Driver interactions
- B60L2250/10—Driver interactions by alarm
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a monitoring Device (DS) for equipping a vehicle (V) comprising an electric powertrain and an on-board network (RB) supplied with electric energy by an electric power supply group comprising a service Battery (BS) and at least one electric energy Generator (GE). The Device (DS) comprises a Processor (PR) and a memory, said processor and said memory being configured to perform the following operations: when the electric power assembly is put into operation, the isolation of the service Battery (BS) from the electric energy Generator (GE) is triggered, then a test of the service Battery (BS) is triggered in order to determine an average minimum voltage at the terminals of the service battery and an average internal resistance of the service battery, and then the state of the service Battery (BS) is determined from these determined average minimum voltage and average internal resistance.
Description
Technical Field
The present invention claims priority to french application n° 2100129 filed on 1-7 of 2021, the contents of which (text, figures and claims) are incorporated herein by reference.
The present invention relates to vehicles with electrical power assemblies (or GMPs), and more particularly to condition monitoring of service batteries (batterie de servitude) of such vehicles.
Background
Some vehicles include a power assembly (or GMP) and an on-board network that is supplied with electrical energy by a power supply unit that includes a rechargeable service battery and at least one electrical energy generator that are coupled (directly or indirectly) to each other. Such an electrical energy generator may be, for example, an alternator or an alternator-starter when the GMP comprises at least one thermally driven machine, or a converter of the direct current/direct current (or DC/DC) type and associated with a main battery of the low, medium or high voltage type, for example, when the GMP comprises at least one electrically driven machine.
In this context, a "service battery" is understood to be a battery of the ultra-low voltage (typically 12V, 24V or 48V) type, which is rechargeable by at least one electrical energy generator.
In addition, in the present context, the term "in-vehicle network" is understood to include an electrical power supply network of electrical (or electronic) equipment (or components) that consume electrical energy, at least one of which is "non-preferential" and at least another of which is "safe (and therefore preferential)".
Finally, in the present context, a "safety equipment (or component)" is understood to mean equipment (or component) for ensuring at least one so-called "safety" function, since said "safety" function relates to the safety of the passengers of the means of transport and therefore needs to be supplied with electrical energy preferentially. This is the case, for example, of an electric power steering device or an electric brake device (for example, a service brake, an emergency brake, a brake assistance system or an anti-slip system).
In some situations of use of the vehicle, for example during so-called emergency maneuvers (e.g. emergency braking or avoidance), it is necessary to have the safety components involved in these maneuvers be powered according to the electrical power level at which the operation of the safety components is guaranteed and the desired performance level of the safety components.
The above-mentioned power supply group is responsible for providing the safety components involved at the considered moment with the electrical power level required for the operation of the other non-safety components used at the considered moment in parallel. In the event that the power supply group cannot supply the electrical power required for all the electrical components involved at the considered moment, a voltage collapse may occur at the terminals of the on-board network and thus of the safety electrical components, which makes these safety electrical components unable to function correctly (that is to say according to a sufficient performance level) and thus may endanger the passengers of the vehicle and/or the vehicle itself and/or the personnel located in the environment of the vehicle.
When the vehicle comprises both a service battery and a main battery for providing electrical energy to at least one electrically driven machine of the GMP, the main battery is primarily requested to power the on-board network. The service battery provides electrical energy for starting the optional thermally driven machine and ensures an electrical power supply supplement that can avoid breakdown of the on-board network in the event of high transient energy consumption. Thus, in a vehicle with at least partial thermal GMP, the thermal drive machine is not activatable when the service battery is in a degraded state or in a weak state of charge, which alerts the driver, whereas in a vehicle with pure electrical GMP the service battery may have the required power level (not very high) for powering the computer (required for the vehicle to be put into operation), but this power level is insufficient to ensure a safe electrical power supply requirement, which makes the vehicle risky.
Patent document EP1207083A1 proposes to determine whether the capacity of the service battery is less than a selected threshold value in order to at least meet the electrical power supply requirements of an electrical power steering device or an electrical braking system, and in the affirmative to trigger a limit on the maximum speed of the vehicle. But this does not inform the driver of the optional risk. Moreover, this cannot guarantee that the measurement of the capacity is reliable, and therefore the speed limitation may prove to be an unreasonable or insufficient measure when there is a safety risk.
Disclosure of Invention
The object of the invention is therefore in particular to determine the actual state of a service battery of a vehicle with pure electrical GMP and to determine the reliability of this state when possible.
To this end, the invention provides, inter alia, a monitoring device for equipping a vehicle comprising an electric powertrain and an on-board network supplied with electric energy by an electric power supply group comprising a rechargeable service battery and at least one electric energy generator.
The monitoring device is characterized in that the monitoring device comprises at least one processor and at least one memory, said at least one processor and said at least one memory being configured to perform the following operations: when the electric powertrain is put into operation, isolation (isolvent) of the service battery from the electric energy generator is triggered, then a test of the service battery is triggered to determine an average minimum voltage at terminals of the service battery and an average internal resistance of the service battery, and then a state of the service battery is determined from these determined average minimum voltage and average internal resistance.
Hereby, a current state of the service battery is obtained, in particular just before the transport means starts to pass, which is particularly safe.
The monitoring device according to the invention may comprise other features, which may be employed alone or in combination, in particular:
-the processor and memory of the monitoring device are configurable to perform the following operations: determining the state from a group of at least two predefined states;
-when the last alternative configuration exists, the processor and the memory of the monitoring device are configurable to: determining the state from a group comprising a first state, a second state and a third state, the first state being indicative of an inability to ensure electrical power supply to the on-board network that is adapted to the electrical power supply requirements of at least one safety electrical component, the second state being indicative of an uncertainty as to whether electrical power supply to the on-board network that is adapted to the electrical power supply requirements of at least one safety electrical component is ensured, the third state being indicative of an ability to ensure electrical power supply to the on-board network that is adapted to the electrical power supply requirements of at least one safety electrical component;
-when the last sub-selectable configuration exists, the processor and the memory of the monitoring device are configurable to: triggering at least one alarm to a passenger of the vehicle, selected from an alarm regarding the risk suffered and an alarm regarding the proposal of at least one action to be performed, in case the first state is determined, and triggering a service alarm to the passenger, in case the second state is determined;
in an implementation variant, the processor and the memory of the monitoring device are configurable to perform the following operations: triggering at least one alert to a passenger of the vehicle, based on the results of a plurality of tests performed on the service battery during a plurality of driving phases, in case the first state is determined, the at least one alert being selected from an alert regarding the risk suffered and an alert regarding the proposal of at least one action to be performed, and, in case the second state is determined, triggering a service alert to the passenger based on the results of a plurality of tests performed on the service battery during a plurality of driving phases;
-the processor and memory of the monitoring device are configurable to perform the following operations: determining the status based on the reliability information of the test;
-when the last alternative configuration exists, the processor and the memory of the monitoring device are configurable to: determining the status when the reliability information of the test characterizes a positive reliability of the test;
-the processor and memory of the monitoring device are configurable to perform the following operations: a test is triggered consisting in causing at least two current calls (appels de courant) predefined by the service battery, during each of which a minimum voltage at the terminals of the service battery and an internal resistance of the service battery are determined, then the average minimum voltage is determined based on these determined minimum voltages and the average internal resistance is determined based on these determined internal resistances.
The invention also provides a vehicle of the optionally motorised type comprising an electric power assembly, an on-board network supplied with electric energy by an electric power supply group comprising a rechargeable service battery and at least one electric energy generator, and a monitoring device of the type described above.
The invention also provides a monitoring method for implementation in a vehicle comprising an electric powertrain and an on-board network supplied with electric energy by an electric power supply group comprising a rechargeable service battery and at least one electric energy generator.
The monitoring method is characterized in that it comprises a step in which, when the electric power assembly is put into operation, the service battery is isolated from the electric energy generator, then a test is performed on the service battery in order to determine an average minimum voltage at the terminals of the service battery and an average internal resistance of the service battery, and then the state of the service battery is determined from these determined average minimum voltage and average internal resistance.
The invention also provides a computer program product comprising a set of instructions which, when executed by a processing means, is capable of implementing a monitoring method of the type described above to monitor the status of a rechargeable service battery of a vehicle, the vehicle comprising an electrical power assembly and an on-board network supplied with electrical energy by an electrical power supply group comprising the service battery and at least one electrical energy generator.
Drawings
Other features and advantages of the present invention will become more apparent upon reading the following detailed description of the invention and the accompanying drawings in which:
fig. 1 shows schematically and functionally an embodiment of a vehicle comprising pure electrical GMP and a distribution box comprising a monitoring device according to the invention,
figure 2 schematically and functionally shows an embodiment of a monitoring device according to the invention,
figure 3 schematically shows an example of a state mapping of a service battery according to its average internal resistance and average minimum voltage, and
fig. 4 schematically shows an example of an algorithm implementing the monitoring method according to the invention.
Detailed Description
The object of the present invention is, inter alia, to provide a monitoring device DS and an associated monitoring method for allowing monitoring of the status of a rechargeable service battery BS of a vehicle V having a pure electric power assembly (or GMP).
Hereinafter, as a non-limiting example, the vehicle V is considered to be of the motorised type. The transport means relates for example to a car, as shown in fig. 1. The invention is not limited to this type of vehicle. The invention relates to virtually any type of vehicle comprising an electric GMP and an on-board network supplied with electric energy by an electric power supply group comprising a rechargeable service battery and at least one electric energy generator. Thus, the invention relates to land vehicles (e.g. utility vehicles, motor homes, kids, buses, trucks, motorcycles, road equipment, construction equipment, agricultural equipment, recreational equipment (snowmobiles, carts), equipment with tracks), boats and aircraft, for example.
Fig. 1 schematically shows a vehicle V, which comprises a drive train with an electrical GMP, an on-board network RB, a service battery BS, an electrical energy generator GE and a monitoring device DS according to the invention.
The in-vehicle network RB is an electrical power supply network that includes electrical (or electronic) equipment (or components) that consume electrical energy. At least one of these electrical (or electronic) equipment (or components) is "non-preferential" and at least another of these electrical (or electronic) equipment (or components) is "safe (and therefore preferential)".
It is noted that "safety equipment (or component)" is understood herein to mean equipment (or component) that consumes electrical energy to ensure at least one so-called safety function (as it relates to the safety of the passengers of the vehicle V) and therefore needs to be supplied with electrical energy preferentially. The equipment (or component) may for example relate to an electric power steering device or an electric brake device (e.g. service brake, emergency brake, brake assist system or anti-slip system).
Non-preferential electrical (or electronic) equipment (or components) consume electrical energy to ensure at least one non-indispensable function (e.g., heating/air conditioning or seat heating or seat massaging devices).
The service battery BS is responsible for providing electrical energy to the on-board network RB as a complement to the electrical energy provided by the main battery BP described further below. For example, the service battery BS may be configured in the form of an ultra low voltage (typically 12V, 24V or 48V) type battery. The service battery is rechargeable by at least one electrical energy generator GE of the vehicle V.
The drive train has pure electric GMP and thus comprises, inter alia, an electric drive machine MM, an engine shaft AM, a main battery BP and a drive shaft AT.
The term "electric drive machine" is understood herein to mean an electric machine configured to provide or recover torque to move a vehicle V.
The drive machine MM (here an electric motor) is coupled with the main battery BP in order to be supplied with electric energy and optionally to supply the main battery BP with electric energy. The drive machine is coupled with the engine shaft AM to provide torque to said engine shaft by driving rotation. The engine shaft AM is here coupled with a reduction gear RD, which is also coupled with a propeller shaft AT, which itself is coupled with a first axle (here a wheel axle) T1, preferably via a differential D1.
The first axle T1 is located in the front portion PV of the vehicle V. In a variant, however, the first axle T1 may be an axle (referenced T2) located in the rear portion PR of the vehicle V.
For example, the main battery BP may be of a low voltage type (typically, 400V as an example). But the battery may be of medium or high voltage type.
The drive machine MM is also coupled to an electrical energy generator GE, which is also coupled (here indirectly) to the service battery BS to recharge the latter, in particular according to the converted electrical energy from the main battery BP.
As an example, the electrical energy generator GE is a direct current/direct current (or DC/DC) type converter. In addition to recharging the service battery BS, the electrical energy generator is also responsible for powering the on-board network RB according to the converted electrical energy from the main battery BP.
It is also noted that in the example shown in fig. 1, without limitation, the vehicle V comprises a distribution box BD associated with a service battery BS, an electrical energy generator GE and an on-board network RB. The distribution box BD is responsible for distributing in the vehicle network RB the electrical energy stored in the service battery BS or generated by the electrical energy generator GE for powering the electrical components (or equipment) according to the received power supply requirements. The monitoring of the distribution of this electrical energy may be ensured by the computer CS. In the example shown in fig. 1, without limitation, the monitoring computer CS is part of the distribution box BD. In an implementation variant (not shown), however, the monitoring computer CS may not be part of the distribution box BD.
As shown in fig. 2, without limitation, the monitoring device DS according to the invention comprises at least one processor PR and at least one memory MD configured for performing operations at least each time the electric powertrain is put into operation.
These operations consist firstly in: when the electric powertrain is put into operation, the isolation of the service battery BS from the electric energy generator GE is triggered, and then a test of the service battery BS is triggered in order to determine the average minimum voltage um at the terminals of the service battery BS and the average internal resistance rm of the service battery BS.
The isolation of the service cell BS and the testing of the service cell BS can be carried out, for example, by the test device DT. For this purpose, the test device DT may for example comprise a switching circuit which is responsible for isolating the service battery BS from the electrical energy generator GE (and preferably also from the on-board network RB) under command of the monitoring device DS.
Each test triggered by the processor PR and the memory MD may consist, for example, in causing at least two current calls predefined by the service battery BS. For example, the number of current calls per test may be equal to five. But the number may take any value greater than or equal to two.
Each current summoning may be performed, for example, via a switchable charging loop after isolating the service battery BS. For example, each current call for a test may be approximately 100A and may be performed every 100 ms. The charging circuit may for example be part of the test device DT.
During each current call, the minimum voltage at the terminals of the service cell BS and the internal resistance of the service cell BS are determined, for example, by the test device DT.
When the charge call is carried out continuously, the processor PR and the memory MD are configured to perform the following operations: an average minimized voltage um is determined based on the minimized voltages determined during each of the charging calls and an average internal resistance rm is determined based on the internal resistances determined during each of the charging calls.
Note that in the example shown in fig. 2 without limitation, the test device DT is independent of the monitoring device DS and coupled to the monitoring device DS. In an embodiment variant (not shown), however, the test device DT can be part of the monitoring device DS.
The processor PR and the memory MD are also configured to perform the following operations: the state of the service battery BS is determined from the average minimum voltage um and the average internal resistance rm determined after the charge summoning of the test.
Thereby, the current state of the service battery BS is obtained, in particular just before the transport vehicle V starts to pass. This is particularly desirable, especially when the service battery BS is in a degraded state or a weak state of charge (which prevents ensuring safe electrical power requirements in the vehicle V).
Note that in the example shown in fig. 2, without limitation, the processor PR and the memory MD are part of a computer CD, which itself is part of the monitoring device DS and is implemented in the form of a combination of an electrical or electronic circuit or element (or "hardware") and a software module (or "software"). In an embodiment variant (not shown), the processor PR and the memory MD may be part of a computer (which is not part of the monitoring device DS) and thus be used to ensure at least another function in the vehicle V. In this variant, the computer may be, for example, a monitoring computer CS, in which case the monitoring device DS is part of the monitoring computer CS.
In addition, in the example shown in fig. 1, without limitation, the monitoring device DS is part of the distribution box BD. In an embodiment variant (not shown), however, the monitoring device DS may be located outside the distribution box BD.
The processor PR may be, for example, a digital signal processor (or DSP ("Digital Signal Processor"). The processor PR may include an integrated (or printed) circuit or a plurality of integrated (or printed) circuits coupled by a wired or wireless connection.
The memory MD is a random access memory for storing instructions for implementing at least part of the monitoring method (and thus the functional groups of the monitoring method) described further below by the processor PR.
Note also that the processor PR and the memory MD may also be configured to perform the following operations: the state of the serving cell BS is determined from a set of at least two predefined states.
As an example, the processor PR and the memory MD may use three states. In this case:
a first state e1, which may characterize the inability of the service battery BS to ensure an electrical supply to the on-board network RB adapted to the electrical supply requirements of at least part of the at least one safety electrical component,
a second state e2, which can characterize whether the service battery BS is uncertain as to whether an electrical supply to the vehicle network RB adapted to the electrical supply demand of at least part of the at least one safety electrical component can be ensured, and
a third state e3, which may characterize the service battery BS as being able to ensure an electrical supply to the on-board network RB adapted to the electrical supply requirements of at least part of the at least one safety electrical component.
It is understood that when the service battery BS is in the first state e1, the service battery is not able to provide the electrical energy supplement required to meet the safety electrical power supply requirements in the vehicle V, which is dangerous. Conversely, when the service battery BS is in the third state e3, it is able to provide the electrical energy supplement required to meet the safety electrical power supply requirements in the vehicle V. Finally, when the service battery BS is in the second state e2, the possibility exists that the service battery cannot provide the electrical energy supplement required to meet the safety electrical power supply requirements in the vehicle V, which is potentially dangerous.
For example, the monitoring device DS may use a state map of the service battery BS according to its average internal resistance rm (in milliohms or ohms) and the average minimum voltage um (in volts). The digital data defining the mapping is stored in a memory MD or mass memory MM (which will be described in more detail below). An example of such a mapping is shown in fig. 3. In this example:
when its determined average internal resistance rm and average minimum voltage um are contained in a first zone Z1, which is delimited by points (um 1, rm 1), (um 1, rm 4), (um 5, rm 3), (um 2, rm 3) and (um 2, rm 1), the service cell BS is in its first state e1,
when its determined average internal resistance rm and average minimum voltage um are contained in a second zone Z2, which is delimited by points (um 2, rm 1), (um 2, rm 3), (um 5, rm 3), (um 4, rm 2) and (um 3, rm 1), and, in its second state e2, the service cell BS is in
When its determined average internal resistance rm and average minimum voltage um are contained in a third zone Z3, which is delimited by points (um 3, rm 1), (um 4, rm 2), (um 5, rm 3) and (um 5, rm 1), the service cell BS is in its third state e3.
Instead of using the map to determine the state of the serving cell BS, one or more mathematical formulas may be used.
Note that when the monitoring device DS characterizes the service battery BS using only two states, the first state e1 and the third state e3 are preferably used.
In the first embodiment, in case the first state e1 is determined, the processor PR and the memory MD may be further configured for performing the following operations: at least one first alarm of the passenger of the vehicle V is triggered, said at least one first alarm being selected from an alarm regarding the risk suffered and an alarm regarding the proposal of at least one action to be performed.
This first alert to the passenger serves to attract the passenger's attention to problems (existing at the location of the service cell BS and requiring maintenance as soon as possible in after-market service). The first alert may be made by displaying an optionally red first dedicated service light (e.g., a service battery light) and/or an optionally red second dedicated service light (e.g., an immediate stop (or "stop") light) or by displaying a dedicated text alert message on a screen of the vehicle V (e.g., a screen of a dashboard or a screen of a central cluster) and/or by transmitting a dedicated sound (or audio) alert message via at least one speaker present in the vehicle V. The display of the first alarm thus preferably continues until the end of the driving phase of the vehicle V.
In the first embodiment, in case the second state e2 is determined, the processor PR and the memory MD may be further configured for performing the following operations: a second service alert is triggered to the passenger.
This second alert is only used to attract the attention of the passenger to a possible problem in order to make the passenger want to make a technical check in after-sales service. The alert may be made by displaying an optionally orange general service indicator light or by displaying a dedicated text alert message on a screen of the vehicle V (e.g. a screen of a dashboard or a screen of a central cluster) and/or by transmitting a dedicated sound (or audio) alert message via at least one speaker present in the vehicle V. The display of the second alarm thus preferably continues until the end of the driving phase of the vehicle V.
Note also that the processor PR and the memory MD may also be configured to perform the following operations: the state of the serving cell BS is also determined from the reliability information of the test. In fact, it is understood that such information can enhance the benefits provided by knowledge of the current state of the serving cell BS, as such information ensures that the state is realistic.
For example, the reliability information may be selected from at least:
first information i1, which characterizes a lack of reliability, because the internal resistance and the minimum voltage are considered unreliable due to their outliers,
second information i2, which characterizes that the test cannot be carried out, for example due to an internal failure of the test device DT,
third information i3 characterizing an uncertainty as to whether or not the test can be fully performed, for example due to a condition that is not optimal for completing the test or due to an interruption to the test required by the computer (optionally CS) of vehicle V, and
-fourth information i4, which characterizes a positive reliability, since the internal resistance and the minimum voltage are considered reliable due to their normal values.
For example, when there is a unique fourth information i4, the processor PR and the memory MD may be configured to perform the following operations: consider that the serving cell BS is positively in the first state e1 or the second state e2 or the third state e3. This is particularly useful when using the first embodiment, and thus when making a (alert or not) decision based on a separate test for the serving battery BS.
A second embodiment may be used in which the decision (alert or not) is made based on a plurality of tests for the serving battery BS performed during a plurality of driving phases. The aim is to eliminate the possible defect states e1 and e2 that occur cumulatively in the first zone Z1 and the second zone Z2.
In this second embodiment, the processor PR and the memory MD may be configured for example for proceeding as described below when there is first information i1 or second information i2 or third information i3 or fourth information i 4. More precisely, the processor PR and the memory MD may be configured to perform the following operations: in the case of the determination of the first state e1, at least one alert to the passenger of the vehicle V is triggered on the basis of the results of a plurality of tests performed on the service battery BS during a plurality of driving phases, said at least one alert being selected from the alert regarding the risk suffered and the alert regarding the proposal of at least one action to be performed, and in the case of the determination of the second state e2, a service alert to the passenger is triggered on the basis of the results of a plurality of tests performed on the service battery BS during a plurality of driving phases.
For example, the processor PR and the memory MD may be configured to perform the following operations:
-incrementing a first counter by one unit (i.e. +1) when the first reliability information i1 or the second reliability information i2 is present or when the fourth reliability information i4 and the first state e1 are present, said first counter being associated with the determination of the first state e1 during the previous test, or
-when third reliability information i3 is present or when fourth reliability information i4 and second state e2 are present, incrementing a second counter by one unit (i.e. +1) associated with the determination of second state e2 during the previous test, or
Incrementing a third counter associated with the cumulative determination of the first state e1 and the second state e2 during the previous test by one unit when the first reliability information i1 or the second reliability information i2 is present, or by one unit (i.e., + (1 x v 1)) weighted by a first value v1 smaller than one when the third reliability information i3 is present, or by one unit (i.e., + (1 x v 2)) weighted by a second value v2 smaller than one and smaller than v1 when the fourth reliability information i4 and the second state e2 are present.
When these counters are present, the processor PR and the memory MD may be configured to perform the following operations:
-triggering a first alarm, or, from the time the value of the first counter becomes equal to a first predetermined value or the value of the third counter becomes equal to a third predetermined value
-triggering a second (service) alarm from the value of said second counter becoming equal to a second predefined value.
Each time the monitoring means DS determine that the serving cell BS is in the third state e3, the value of each counter is reset to zero.
It is also noted that, as shown in fig. 2 without limitation, the computer CD may also comprise a mass memory MM as a complement to the random access memory MD and the processor PR of the management device DG, said mass memory being used in particular for storing the determined minimum voltages and internal resistances and the mapped optional digital data and counter values and intermediate data involved in all the calculation and processing of these data. In addition, the computer CD may also comprise an input interface IE for receiving at least the determined minimum voltage and internal resistance and a message indicating that the electrical GMP is put into operation, to use the data in the calculation or processing, optionally after shaping and/or demodulating and/or amplifying the data by means of the digital signal processor PR' in a manner known per se. The computer CD may furthermore comprise an output interface IS, in particular for transmitting alarm controls determined by the monitoring device DS.
The invention can also be regarded as a form of monitoring method (for implementation in the vehicle V described hereinabove so as to allow monitoring of the state of the service battery BS of said vehicle).
The monitoring method comprises steps 10-90, wherein the service battery BS is isolated from the electrical energy generator GE when the electrical GMP is put into operation, and then a test of the service battery BS is performed in order to determine an average minimized voltage um at the terminals of the service battery BS and an average internal resistance rm of the service battery BS, and then the status of the service battery BS is determined from these determined average minimized voltage um and average internal resistance rm.
An example of an algorithm implementing the monitoring method 10-90 according to the invention is schematically shown in fig. 3 (here in a second embodiment).
The algorithm comprises a substep 10, which starts when the monitoring device DS is informed of the electric GMP being put into operation, wherein the service battery BS is isolated from the electric energy generator GE.
Then, in sub-step 20, a test for the service cell BS is performed in order to determine the average minimum voltage um at the terminals of the service cell BS and the average internal resistance rm of the service cell BS.
Then, in optional substep 30, reliability information for the test may be determined.
When the information is the fourth information i4, then in sub-step 40 the state of the service battery BS may be determined from the average minimized voltage um and the average internal resistance rm determined in sub-step 20. In case a third state e3 is determined, the method ends in a substep 50 (but after the first counter, the second counter and the third counter are zeroed) without alerting the passengers of the vehicle V.
In case the first state e1 is determined in sub-step 40 or when the information determined in optional sub-step 30 is the first information i1 or the second information i2, said first and said third counter are incremented by one unit (i.e. + 1) in sub-step 60. Then, when the value of the first counter becomes equal to a first predefined value or when the value of the third counter becomes equal to the third predefined value, at least one first alarm for the passenger of the vehicle V (selected from an alarm about the risk suffered and an alarm about the proposal of at least one action to be performed) is generated in sub-step 70.
In case the second state e2 is determined in sub-step 40, the third counter is incremented by one unit of the weighted second value v2 (i.e. + (1 x v 2)), or when the information determined in optional sub-step 30 is the third information i3, the second counter is incremented by one unit (i.e. +1) and the third counter is incremented by one unit of the weighted first value v1 (i.e. + (1 x v 1)) in sub-step 80. Then, when the value of the second counter becomes equal to a second predetermined value or when the value of the third counter becomes equal to a third predetermined value, a second (service) alert for the passenger of the vehicle V is generated in sub-step 90.
It is also noted that the present invention also provides a computer program (or computer program) product comprising a set of instructions which, when executed by a processing means (for example a processor PR) of the electronic circuit (or hardware) type, are able to implement the monitoring method described above for monitoring the state of the service battery BS of a vehicle V.
Claims (10)
1. A monitoring Device (DS) for a vehicle (V) comprising an electric powertrain and an on-board network (RB) supplied with electric energy by an electric power supply group comprising a rechargeable service Battery (BS) and at least one electric energy Generator (GE), characterized in that it comprises at least one Processor (PR) and at least one Memory (MD) configured to perform the following operations: when the electric power assembly is put into operation, the isolation of the service Battery (BS) from the electric energy Generator (GE) is triggered, then a test of the service Battery (BS) is triggered in order to determine an average minimized voltage at the terminals of the service Battery (BS) and an average internal resistance of the service Battery (BS), and then the state of the service Battery (BS) is determined from these determined average minimized voltages and average internal resistances.
2. The monitoring device according to claim 1, characterized in that the Processor (PR) and the Memory (MD) are configured for performing the following operations: the state is determined from a set of at least two predefined states.
3. The monitoring device according to claim 2, characterized in that the Processor (PR) and the Memory (MD) are configured for performing the following operations: determining the state from a group comprising a first state, a second state and a third state, the first state being indicative of an inability to ensure electrical power supply to the on-board network (RB) adapted to the electrical power supply demand of at least one safety electrical component, the second state being indicative of an uncertainty of an ability to ensure electrical power supply to the on-board network (RB) adapted to the electrical power supply demand of at least one safety electrical component, the third state being indicative of an ability to ensure electrical power supply to the on-board network (RB) adapted to the electrical power supply demand of at least one safety electrical component.
4. A monitoring device according to claim 3, characterized in that the Processor (PR) and the Memory (MD) are configured for performing the following operations: when the first state is determined, at least one alarm is triggered to the passenger of the means of transport (V), said at least one alarm being selected from an alarm regarding the risk suffered and an alarm regarding the proposal of at least one action to be performed, and when the second state is determined, a service alarm is triggered to the passenger.
5. The monitoring device according to any one of claims 1 to 4, characterized in that the Processor (PR) and the Memory (MD) are configured for performing the following operations: the status is also determined from the reliability information of the test.
6. The monitoring device according to claim 3 or 4 in combination with claim 5, wherein the Processor (PR) and the Memory (MD) are configured for performing the following operations: the state is determined when the reliability information of the test characterizes a positive reliability of the test.
7. The monitoring device according to any one of claims 1 to 6, characterized in that the Processor (PR) and the Memory (MD) are configured for performing the following operations: triggering a test consisting in causing at least two current calls predefined by the service Battery (BS), during each of which a minimum voltage at a terminal of the service Battery (BS) and an internal resistance of the service Battery (BS) are determined, then determining the average minimum voltage based on the determined minimum voltage and the average internal resistance based on the determined internal resistance.
8. A vehicle (V) comprising an electric powertrain and an on-board network (RB) supplied with electric energy by an electric power supply group comprising a rechargeable service Battery (BS) and at least one electric energy Generator (GE), characterized in that it further comprises a monitoring Device (DS) according to any of the preceding claims.
9. Monitoring method for a vehicle (V) comprising an electric powertrain and an on-board network (RB) supplied with electric energy by an electric power supply group comprising a rechargeable service Battery (BS) and at least one electric energy Generator (GE), characterized in that it comprises the steps (10-90) of isolating the service Battery (BS) from the electric energy Generator (GE) when the electric powertrain is put into operation, then performing a test of the service Battery (BS) in order to determine an average minimized voltage at the terminals of the service Battery (BS) and an average internal resistance of the service Battery (BS), and then determining the state of the service Battery (BS) from these determined average minimized voltages and average internal resistances.
10. A computer program product comprising a set of instructions which, when executed by a processing means, is capable of implementing the monitoring method according to claim 9 for monitoring the state of a rechargeable service Battery (BS) of a vehicle (V) comprising an electric powertrain and an on-board network (RB) supplied with electric energy by an electric power supply group comprising the service Battery (BS) and at least one electric energy Generator (GE).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2100129 | 2021-01-07 | ||
| FR2100129A FR3118677B1 (en) | 2021-01-07 | 2021-01-07 | MONITORING THE CONDITION OF A SERVICE BATTERY OF AN ELECTRIC GMP VEHICLE |
| PCT/FR2021/052130 WO2022148915A1 (en) | 2021-01-07 | 2021-11-30 | Monitoring the status of a low-voltage rechargeable battery of a vehicle having an electric power train |
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| Publication Number | Publication Date |
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| CN116685488A true CN116685488A (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180089675.6A Pending CN116685488A (en) | 2021-01-07 | 2021-11-30 | State monitoring for service battery of vehicle with electric power assembly |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4274759A1 (en) |
| CN (1) | CN116685488A (en) |
| FR (1) | FR3118677B1 (en) |
| WO (1) | WO2022148915A1 (en) |
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| FR3133497A1 (en) * | 2022-03-11 | 2023-09-15 | Psa Automobiles Sa | METHOD FOR PROTECTING A COMPUTER OF A VEHICLE ELECTRICAL SUPPLY SYSTEM |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223013B1 (en) | 1970-07-01 | 1977-06-21 | ||
| DE10056968A1 (en) | 2000-11-17 | 2002-05-23 | Bosch Gmbh Robert | Method and device for operating an electrical system of a motor vehicle |
| JP6603888B2 (en) * | 2015-02-12 | 2019-11-13 | パナソニックＩｐマネジメント株式会社 | Battery type determination device and battery type determination method |
| JP7189693B2 (en) * | 2018-07-13 | 2022-12-14 | 株式会社Subaru | power system |
-
2021
- 2021-01-07 FR FR2100129A patent/FR3118677B1/en active Active
- 2021-11-30 EP EP21830460.8A patent/EP4274759A1/en active Pending
- 2021-11-30 CN CN202180089675.6A patent/CN116685488A/en active Pending
- 2021-11-30 WO PCT/FR2021/052130 patent/WO2022148915A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022148915A1 (en) | 2022-07-14 |
| FR3118677A1 (en) | 2022-07-08 |
| FR3118677B1 (en) | 2024-03-22 |
| EP4274759A1 (en) | 2023-11-15 |
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