CN109606113A - Method for being provided protection against in the energy accumulator of vehicle - Google Patents
Method for being provided protection against in the energy accumulator of vehicle Download PDFInfo
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- CN109606113A CN109606113A CN201811138951.XA CN201811138951A CN109606113A CN 109606113 A CN109606113 A CN 109606113A CN 201811138951 A CN201811138951 A CN 201811138951A CN 109606113 A CN109606113 A CN 109606113A
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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
- 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
-
- 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
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to the methods for providing protection against at least one battery (11) of the energy accumulator (10) of vehicle (1), wherein realizing the energy supply in vehicle (1) by battery (11) under operation and forbidding the energy supply under static state.It provides herein; following steps are executed under static state: a) executing monitoring by monitoring arrangement (20); wherein repeatedly detect measured value (110); the measured value is specific respectively for the cell voltage in battery (11); b) when the comparison detection by least two measured values (110) detected is to malfunction in battery (11); it executes at least one safety measure to make a return journey activated batteries (11), in order to provide defencive function.
Description
Technical field
The present invention relates to according to the method for defining type closer in the preamble of dependent method claims.
Background technique
From US 2016/0103188 it is known that identification is provided after long period charging when the open-circuit voltage decline of battery pack
There is the battery pack of internal short-circuit.
A kind of battery pack mould of the electrochemical cell with multiple interconnection known from 10 2,015 200 406 A1 of DE
Block.
In electric vehicle, the battery based on lithiumation usually may be used as energy storage because with based on nickel or
The battery that lead stores is compared, they have very high energy density in the case where light weight.In general, these electric energy are deposited
Memory combination in battery pack packet, this for example by the series connection of single battery or as battery series connection and be connected in parallel
Combination is to realize.
Summary of the invention
Subject of the present invention is a kind of method of feature with dependent method claims.Other features of the invention and
Details is obtained from corresponding dependent claims, the description and the appended drawings.
Here, according to the method for the present invention for providing protection function at least one battery of the energy accumulator of vehicle
Energy.This defencive function, which for example can be, carries out safety trip to battery to prevent the critical state in battery.For example, can lead to
The short circuit for crossing battery causes this critical state.Energy accumulator can have at least one battery (especially chargeable electricity
Pond group battery), wherein when necessary also by multiple battery combinations in battery pack packet, for example to be supplied to the onboard power system of vehicle
Energy.Therefore, operating status can be set, wherein the energy supply of vehicle, such as onboard power system with customer energy
Supply is realized by the battery of battery or energy accumulator.Stationary state is formed with this opposite, wherein forbidding energy supply simultaneously
And battery is particularly in zero load.Battery cell can be the battery cell based on lithiumation with high electric energy density.
Within the scope of the invention it can be stated that under static state-and preferably only except operating status-
Execute subsequent step:
A) monitoring is executed by monitoring arrangement, wherein repeatedly (i.e. especially cyclically) detection measured value, particularly voltage are surveyed
Magnitude, for the measured value respectively for the cell voltage in battery, the open-circuit voltage preferably for battery is specifically, that is, to change sentence
It talks about and can be voltage measuring value respectively,
B) it when detecting the malfunction in battery by least two comparison in measured value detected, executes extremely
A few safety measure is made a return journey activated batteries, in order to provide defencive function, wherein preferably, also being compared by monitoring arrangement execution
And/or safety measure.
Therefore, it is thus achieved that an advantage, it can the technology in reduction identification malfunction, such as internal short-circuit of battery
Complexity.Because it is generally necessary to which high calculate the electronic device expended with respective performances brilliance, so as to for example based on cell voltage song
Line execution identifies early.Correspondingly, another advantage of according to the present invention, it can also save by central battery group electronic device
(BCU) the step of, particularly batteries management system (BMS) implements according to the method for the present invention.Therefore it is possible that working as BCU
When there is no (such as by onboard power system of vehicle) power supply and/or BCU to be switched off, the monitoring and/or root according to step a) are also carried out
According to the safety measure of step b).In other words, can independently of BCU energy supply monitored, such as in the tool of vehicle
Have in the shutdown phase of minimal energy consumption.For example, deactivating battery is understood as cells convert into safe condition, such as pass through
Isolation and/or controlled electric discharge etc..
It can be stated that malfunction is the short circuit in energy accumulator, preferably internal short-circuit of battery.Here, safety
Measure may include control safety switch, for example electrical or electrochemical switch.Safety switch is for example embodied as irreversible safety open
It closes, i.e., therefore can only switch primary (for interrupting or establishing circuit).For example, safety switch be configured to power semiconductor switch or
Relay or repid discharge element or antifuse element.Particularly, safety switch is integrated into the current path with battery,
Such as it is connected in series or in parallel with battery.
For example, energy accumulator includes at least one battery (especially battery cell), wherein preferably, multiple batteries
Electrical arrangement is carried out to be connected in series or as the combination connected and be connected in parallel.Advantageously, energy accumulator is configured to
Rechargeable battery pack (battery), preferably battery pack packet.In addition, energy accumulator can be structured as the traction battery of vehicle
Group, and be preferably used for carrying out energy supply to the onboard power system of vehicle, particularly preferably lies prostrate 12 V() onboard power system or
The onboard power system of 48V and onboard power system greater than 60V carry out energy supply.According to another advantage, energy accumulator is embodied as
(chargeable) battery pack with the system voltage higher than 40V or 60V, such as it is embodied as the specified electricity with 360V or < 770V
The traction battery group of pressure.
(such as be greater than 60 V system voltage) traction battery group in and/or 48V BRS battery pack (BRS
=boosting regenerative system) in, battery pack can onboard power system corresponding to vehicle separates when not in use in vehicle, such as closes electricity
The part of pond group electronic device.It alternatively or additionally, when necessary can also be by the direct by battery pack of battery pack electronic device
Battery powered part is switched to energy-saving mode.Pass through and disconnect high pressure or 48V onboard power system, it can be ensured that no energy can be from
Battery pack is flowed into vehicle, i.e., is unable to the electric current flowing of course of emergency battery in this state.
According to another advantage, Vehicle structure is motor vehicles and/or passenger vehicle and/or truck and/or electric vehicle
And/or hybrid vehicle.
In addition, within the scope of the invention can advantageously, according to step b) detection failure state in the following manner,
I.e. according to the voltage loss in measured value monitoring cell, wherein preferably thus by the measured value of corresponding current detection and (example
Such as recycling determining or tracking or predefined and/or pre-stored) recognition threshold is compared.Therefore, this comparison
It is understood to compare at least two measured values detected in the sense that step b).Therefore, exceeding in battery can be identified
The voltage loss of the normal self discharge of battery, to detect malfunction.Because not having in stationary state in this case
There is electric current that can flow through battery, so therefore failure can be detected by analyzing the time graph of measured value in a simple manner
The internal short-circuit of state, such as battery.
It is also possible that wherein the analysis is by extremely in order to detect and analyze according to step b) the time graph of measured value
Lack at least one difference of two measured values to execute.For example, in this case, if two measured values (such as current sum
Previous measured value) difference be greater than 30mV, then can detect malfunction for certain.This can be realized for monitoring battery electricity
The particularly simple solution of pressure.
It optionally provides, measured value is detected with the time interval of 100ms to 500ms (in particular according to first rate).It changes
Sentence talk about, can choose the time interval for detecting measured value, compared with the optional voltage measurement in operating status, this when
Between be spaced very big (for example, at least 2 times to 100 times).It is possible thereby to realize the measured value inspection with low-down energy consumption
It surveys, thus can also continuously be monitored in stationary state in the case where the self discharge of battery pack is not significantly improved.
It is also advantageous that (the example of measured value detected is executed on the time after each detection according to step a)
Such as arithmetic) be averaging so that respectively determine average value, and in step b) by respectively current detection measured value with respectively when
The average value of preceding determination is compared, to detect malfunction.Therefore, this comparison is also understood as the meaning in step b)
Compare at least two measured values detected in justice.It can be advantage, herein in each duplicate spy according to step a)
It is not to be determined the averaging of quantity, such as 2 to 5 measured values after the detection that circulation executes, it is current flat to determine
Mean value.Then, in step b), the measured value of (previously in step a)) current detection can be with current respectively (before) respectively
Determining average value is compared, such as forms the difference between measured value and average value.Thus, it is possible to improve according to the present invention
The robustness of method, and correspondingly can be to avoid the erroneous trigger of safety device.
In another possibility it can be stated that by the averaging of measured value detected after step a) on the time
To determine recognition threshold, and the measured value of current detection is compared with recognition threshold preferably in step b).Alternatively or
Additionally can it is possible that, be also averaging in multiple detections circulation according to the comparison result of step b), such as at two
To five measured values or circulation, and the result for only working as the averaging meets detection criterion, just detects event for certain
Barrier state.When the result of averaging is less than (or being equal to) average value and/or is less than recognition threshold (therefore being less than activation threshold value),
Such as just meet (such as identification short-circuit) detection criterion.
It can also be that if at least one current measurement value (or last measured value that may also be current) is less than
The average value of previous measured value subtracts the fixed value of recognition threshold, then meets detection criterion.For example, previous measured value can be with
It is that the fixed value of 3.89V and recognition threshold can be 0.3V, so that inspection identification measured value is caused to be 3.58V.
It is also advantageous that within the scope of the invention, if in the comparison according to step b) current detection measurement
Value be greater than recognition threshold, then executed according to the detection of step a) with the first (time) rate, and when necessary, especially only when
When being less than or equal to recognition threshold according to the measured value of current detection in the comparison of step b), according to the detection of step a) to be greater than
Second rate of first rate executes.In particular, cannot be fixed value in this recognition threshold, but such as baseline measurement is flat
Mean value subtracts the fixed value of recognition threshold.It is thereby achieved that another advantage, because recognizing lower than recognition threshold (i.e.
Trigger event) after, the sample rate of battery voltage measurement is improved, and therefore can guarantee sufficiently fast identification and relative to mistake
Enough robustness of false triggering.Particularly, only when confirmed malfunction in the detection with second (higher) rate,
Malfunction can be just detected for certain and/or can execute safety measure, such as activation safety device.Even if with
Measured value in the cycle detection of second rate in multiple circulations, i.e., for example, at least 4 or 6 measured values are always lower than identification threshold
Value (is respectively less than or equal to recognition threshold), and for example it is particularly the case for this.This can be realized the so-called of trigger event and goes
Shake.
It is further advantageous that step a) and b) being executed by monitoring arrangement, the monitoring arrangement is thus independently of battery set management
It is systematically configured to distribute to the electronic device of battery (with the associated electronic device of battery).Term " being associated with battery " is advantageously
Refer to, electronic device (i.e. monitoring arrangement) is disposed on battery and/or is fixed on battery and/or is electrically integrated with battery
Circuit neutralization/or, preferably completely and/or only by battery supplied energy.For example, monitoring arrangement be configured to be mounted on it is special on battery
With integrated circuit (ASIC).In multiple batteries of energy accumulator, monitoring arrangement be may be mounted on each battery, and example
It such as include the analog-digital converter (ADC) and other possible logic elements for battery voltage detection, such as activated batteries
Safety device.According to another advantage, monitoring arrangement is therefore also it is so structured that control device.For example, the energy of monitoring arrangement
Supply is generated by cell voltage completely, monitoring arrangement automatically (i.e. independently of BMS) is run, to measure battery
Voltage.
In addition, within the scope of the invention it can be stated that step a) and b) execute under static state, wherein battery and its
The connection of his battery, and step a) and b) furthermore executed under the transmission state of battery, wherein battery and other batteries are electrically separated,
Wherein preferably not only under static state but also in the transmit state, battery is switched to unloaded (and/or non-loaded).Here
It is switched to the non-loaded electric switch for connecting the load (such as onboard power system with customer) being used for vehicle, such as of referring to
Contactor or semiconductor switch etc. disconnect, so that when necessary by cells convert into zero load.In stationary state, this battery can
To switch always non-loadedly, operation is switched to wherein only can come out from stationary state when necessary and (not enter transmission state)
In state.In operating status, it can be correspondingly closed electric switch, so as to realize the energy supply of load.In particular,
In this case advantage is, monitoring arrangement can execute the monitoring according to step a) and/or execute according to the detection of step b) and/
Or starting is according to the execution of the safety measure of step b), independently of batteries management system and therefore because these steps can
Also it executes in the transmit state.For example, battery is not connect in the transmit state with other batteries, and therefore it is not at battery pack
In packet (difference is when necessary under stationary state and operating status).It can be stated that step a) and b) in another possibility
Continuously executed under stationary state and transmission state.Therefore, it can reliably be provided protection against by persistently monitoring, wherein
It, may only under operation by step a) and/or b) when being provided protection against by BMS instead of in this.
For example, monitoring not only according to step a) and can be continuously and cyclically static according to the detection of step b)
It is executed under state and/or transmission state, such as can be always to execute step b) after step a) on the time.Therefore it can be realized
Therefore persistently monitoring simultaneously improves safety.
Be furthermore possible to it is possible that, in the case where detecting malfunction for certain, i.e., when identify and/or confirmation voltage
When decline is greater than recognition threshold, the safety device of related battery is activated, to prevent the critical hot-spot in battery.
According to another advantage, in the method according to the invention it can be stated that according to step a) or according to step b)
Monitoring and/or detection are being deactivated (such as pause) before by energy accumulator access vehicle power grid (onboard power system).This is
It is necessary, because the recognition threshold of internal short-circuit is substantially less than caused when using energy accumulator by discharge current for identification
Voltage change.As other advantages, the logical of monitoring arrangement and central battery group electronic device can be executed in this case
Letter, wherein relevant with activated batteries monitoring (such as detection and/or inspection according to step a) or step b) using for cut off
Survey) order.Particularly, in this case, BCU can be order generator.Then, for example, if recognizing vehicle to height
The demand for pressing supply, then can deactivate the relevant monitoring of battery of internal short-circuit, and when necessary then by the software of BCU first
Execute the identification of internal short-circuit of battery.It can be stated that energy accumulator is just then accessed vehicle onboard power grid, i.e., with load
(such as onboard power system with customer) connection.
Be furthermore possible to it is possible that, separated after (driving pattern) battery pack use terminates with vehicle onboard power grid
Energy accumulator in the case where by the software in BCU identify that internal short-circuit keeps active, until loose and cooling procedure very
It is completed in big degree.If no longer anticipating the significant voltage change of fault-free battery herein, in the relevant electronics dress of battery
Identification function (detecting) can be activated and cut off central electronics (BCU) by setting in (monitoring arrangement).
Optionally it is possible that the monitoring arrangement for the relevant monitoring of battery is when activating battery equilibrium purely
It deactivates, because access balance resistance can lead to the decline of battery voltage measurement.Optionally, in addition, can it is possible that,
Within the entire duration of balance (i.e. so-called battery equilibrium purely) purely, by monitoring arrangement battery phase
It closes the internal short-circuit identification realized on ground to be switched on second (such as lower) recognition threshold, especially also tolerate for example electric
The large change of cell voltage.Alternatively or additionally, can it is possible that, under operation prevent step a) and/or b)
It executes, and the especially described execution preferably passes through batteries management system before the energy supply of battery access vehicle,
It is preferred that being deactivated by deactivating monitoring arrangement and/or switching recognition threshold.
Optionally, in addition it provides, the internal short-circuit that monitoring arrangement and/or battery are relatively realized identifies (i.e. according to step
A) monitoring and/or the detection according to step b)) it is realized on module electronic device.It in this case, when necessary can also be with
Use other recognition thresholds.Present invention is equally related to monitoring arrangements, wherein being stored in monitoring arrangement according to the method for the present invention
Memory in, wherein monitoring arrangement especially is used for execute according to the method for the present invention.The present invention also includes at least one energy
It measures memory, in particular at least one battery cell and/or monitoring arrangement according to the present invention is had based on lithiumation
The energy accumulator of battery pack packet form.
Detailed description of the invention
Other advantages, features, and details of the invention will be obtained from being described below, wherein being described in detail with reference to the attached drawings
The embodiment of the present invention.Here, the feature mentioned in claims and specification can separately itself or with appoint
Meaning combination is important for the present invention.Respectively schematically:
Fig. 1 shows the curve for visualizing measured value detected according to the method for the present invention,
Fig. 2 shows for visualizing the curve of measured value detected according to the method for the present invention,
Fig. 3 shows the vehicle with energy accumulator.
Specific embodiment
Fig. 1 100 is schematically shown in the case where there is internal short-circuit of battery according to the method for the present invention in order to visualize
Possible time cell voltage profiles.Advantageously, according to the method for the present invention 100 measured value 110 according to step a) is executed
Detection, and calculate tracked recognition threshold 120 after each detection.Here, recognition threshold 120 can be calculated as
The average value of last 5 measured values 110 after the measured value 110 of current detection.Here, illustratively by survey detected
Magnitude 110 is compared with virtual voltage 130, for visualizing design according to the present invention with improvement.
Indicate that the cell voltage of with first rate and correspondingly low measurement frequency determines by arrow 150.?
There is event 154(specific for fault condition such as internal short-circuit) when, which influences cell voltage 130.Electricity occurs
The voltage drop of cell voltage 130, it is characterised in that corresponding lower and decline measured value 110.It is lower than in 110 first time of measured value
In the case where recognition threshold 120, it is switched to and (is used for so that the cell voltage of the second rate is determining with high measurement frequency to event 154
Key dithering).Here, switching is indicated by arrow 153, and the battery electricity with the second rate is indicated by another arrow 151
Pressure determines.Because confirmed fault condition in the example according to Fig. 1, (i.e. other measured values 110 are also below recognition threshold
120), safety measure (being indicated by arrow 152) is triggered after reason.For this purpose, for example must by 4 to 6 measured values 110 come into
Row confirmation, so that starting safety measure at the 6th measured value, the 6th measured value is continuously lower than recognition threshold 120.For
Execution safety measure, such as control safety device 30, such as safety switch is opened or closed, to interrupt or closed circuit.
This for example causes the separation of battery and onboard power system and/or cells convert (such as to be put into safe condition by the controlled of battery
Electricity).In Fig. 1, this is characterized by the further faster decline of cell voltage 130.
The curve of measured value is shown in FIG. 2, one of measured value 110 is lower than recognition threshold due to abnormal interference
120, internal short-circuit of battery, i.e. event 154 is but not present.Because being arranged when being lower than for the first time without directly triggering safety
It applies, but replaces improving the rate that cell voltage determines (i.e. the detection of measured value 110) first in this place, it is possible to is relatively fast
This interference is identified fastly.Then (arrow 150) is determined back to according to the cell voltage of first rate again.
Fig. 3 illustrates the vehicle 1 with energy accumulator 10.Energy accumulator 10 especially includes multiple batteries
11, monitoring arrangement 20 and safety device 30 can be respectively allocated to the battery.Furthermore batteries management system 3 is shown,
It can dividually be constructed with monitoring arrangement 20.
The described above of embodiment only describes the present invention in the range of example.Certainly, each spy of embodiment
Sign, as long as technically rationally, can combine freely with each other, without departing from the scope of the present invention.
Claims (11)
1. the method for being provided protection against at least one battery (11) of the energy accumulator (10) of vehicle (1)
(100), wherein realizing the energy supply and under static state in vehicle (1) by the battery (11) under operation
Forbid the energy supply,
It is characterized in that,
Following steps are executed under static state:
A) monitoring is executed by monitoring arrangement (20), wherein repeatedly detecting measured value (110), the measured value is respectively for institute
State the cell voltage in battery (11) be it is specific,
B) when the comparison detection by least two measured values (110) detected to the malfunction in the battery (11)
When, at least one safety measure is executed to deactivate the battery (11), in order to provide the defencive function.
2. according to the method for claim 1 (100),
It is characterized in that,
It detects the malfunction in the following manner according to step b), i.e., detects the battery by the measured value (110)
(11) voltage loss in, wherein thus comparing the measured value (110) of corresponding current detection with recognition threshold (120)
Compared with.
3. method according to claim 1 or 2 (100),
It is characterized in that,
In order to analyze the time graph of the measured value (110) according to the detection of step b), wherein the analysis is by least two
At least one difference of a measured value (110) executes.
4. the method according to one of preceding claims (100),
It is characterized in that,
The measured value (110) is detected with the time interval of 100ms to 500ms.
5. the method according to one of preceding claims (100),
It is characterized in that,
The averaging for executing measured value detected (110) on time after each detection according to step a), so that respectively
It determines average value, and compares the measured value of current detection respectively with the average value currently determined respectively in step b)
Compared with to detect malfunction.
6. the method according to one of preceding claims (100),
It is characterized in that,
Recognition threshold (120) are determined by the averaging of measured value detected (110) after step a) on time, and
The measured value of current detection (110) and the recognition threshold (120) are compared in step b).
7. according to the method for claim 6 (100),
It is characterized in that,
If the measured value (110) of current detection is greater than the recognition threshold (120) in the comparison according to step b), basis
The detection of step a) is executed with first rate, and it is small to work as the measured value (110) of current detection in the comparison according to step b)
When the recognition threshold (120), executed according to the detection of step a) with the second rate for being greater than first rate.
8. the method according to one of preceding claims (100),
It is characterized in that,
Step a) and b) by the monitoring arrangement (20) execute, the monitoring arrangement is thus independently of batteries management system (3)
Ground is configured to distribute to the electronic device of the battery (11).
9. the method according to one of preceding claims (100),
It is characterized in that,
It step a) and b) executes under static state, wherein the battery (11) is connect with other batteries (11), and step a)
And b) furthermore executed under the transmission state of the battery (11), wherein the battery (11) and other batteries (11) are electrically separated,
Wherein preferably not only under static state but also in the transmit state, the battery (11) is switched to non-loaded.
10. according to the method for claim 9 (100),
It is characterized in that,
It step a) and b) is continuously executed under stationary state and transmission state.
11. the method according to one of preceding claims (100),
It is characterized in that,
Step a) and/or execution b) are prevented under operation, and especially described execute is accessed in the battery (11)
Before the energy supply of vehicle, preferably deactivated by batteries management system (3).
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| Application Number | Priority Date | Filing Date | Title |
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| DE102017217523.0 | 2017-10-02 | ||
| DE102017217523.0A DE102017217523A1 (en) | 2017-10-02 | 2017-10-02 | Method for providing a protective function in an energy storage device of a vehicle |
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| CN113002362A (en) * | 2019-12-20 | 2021-06-22 | 奥迪股份公司 | Vehicle having a power battery monitored by a monitoring device and method for monitoring a power battery |
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| DE102021113209A1 (en) | 2021-05-21 | 2022-11-24 | Audi Aktiengesellschaft | Method for detecting a fault condition of at least one battery cell of a battery, detection device and motor vehicle |
| DE102022113179A1 (en) | 2022-05-25 | 2023-11-30 | Webasto SE | Method and system for operating an energy storage device with a plurality of battery cells |
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| DE102017217523A1 (en) | 2019-04-04 |
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