WO2024199890A1 - Verfahren und vorrichtung zur erkennung einer beeinträchtigung des zellkontaktiersystems einer zelleinheit einer batterie - Google Patents
Verfahren und vorrichtung zur erkennung einer beeinträchtigung des zellkontaktiersystems einer zelleinheit einer batterie Download PDFInfo
- Publication number
- WO2024199890A1 WO2024199890A1 PCT/EP2024/055460 EP2024055460W WO2024199890A1 WO 2024199890 A1 WO2024199890 A1 WO 2024199890A1 EP 2024055460 W EP2024055460 W EP 2024055460W WO 2024199890 A1 WO2024199890 A1 WO 2024199890A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell unit
- cell
- voltage
- impairment
- contact system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Definitions
- the invention relates to a device and a corresponding method with which an impairment of the cell contact system of a cell unit of an electric battery cell can be detected in an efficient and reliable manner.
- An at least partially electrically powered vehicle has an energy storage device for storing electrical energy for operating an electric drive motor of the vehicle.
- the energy storage device typically comprises a plurality of individual storage cells, e.g. a plurality of round cells and/or pouch cells, which are arranged in a housing of the energy storage device.
- the storage cells can be grouped into cell units, each with a plurality of individual storage cells.
- the storage cells within the individual cell units can each be electrically connected to one another via a cell contact system.
- the cell contact system of a cell unit of an electrical energy storage device may exhibit an impairment, e.g. due to aging and/or due to mechanical impact. This document deals with the technical task of detecting an impairment of the cell contact system of a cell unit of an electrical energy storage device in an efficient and reliable manner.
- a device for detecting an impairment of a cell contact system of a cell unit of an electrical energy storage device can have a nominal voltage of 300V or more.
- the energy storage device can be designed to provide electrical energy for operating an electric drive machine of a (motor) vehicle.
- the cell contact system can be designed to connect the P storage cells of the cell unit electrically in parallel. Impairment of the Cell contacting system can include, for example, a faulty, in particular a missing, electrical contact of at least one storage cell of the cell unit.
- the device is designed to determine a temporal progression of the voltage at the cell unit (i.e. between the two poles of the cell unit) during a charging process or a discharging process of the energy storage device.
- the voltage can be recorded using a voltage measuring unit.
- the temporal progression can show how the voltage changes over time, in particular increases or decreases.
- the temporal progression can, for example, have 5 voltage values or more, or 10 voltage values or more, or 50 voltage values or more for a corresponding number of different points in time.
- the temporal progression of the voltage can have a gradient that indicates the change in the temporal progression as a function of a unit of time (e.g. per second or per minute).
- the gradient can depend on the level of the charging or discharging current of the charging or discharging process of the energy storage device.
- the device is further configured to detect an impairment of the cell contact system of the cell unit on the basis of the temporal progression, in particular on the basis of the gradient of the temporal progression, of the voltage at the cell unit.
- the device can also be set up to bring about a safety measure, in particular the issuing of a message to a user of the energy storage device (in particular to the user of the vehicle in which the energy storage device is installed), if an impairment of the cell contact system of the respective cell unit has been detected. In this way, particularly safe operation of the energy storage device can be achieved.
- a device is thus described which is designed to analyze the dynamic development of the voltage on at least one cell unit in order to detect an impairment of the cell contact system of the cell unit in a particularly reliable manner.
- the device can be set up to determine a reference voltage curve for the charging process or the discharging process.
- the reference curve can indicate the expected voltage curve at the cell unit in the event that there is no impairment of the contact system of the cell unit.
- the reference voltage curve can depend on a reference model for the cell unit, in particular on values of one or more model parameters of the reference model.
- the values of the one or more model parameters can describe the current state of the cell unit and/or the current charging or discharging process.
- Example model parameters are,
- the impairment of the cell contact system of the cell unit can also be detected in a particularly reliable manner on the basis of the reference curve.
- the device can be set up to compare the determined temporal curve with the reference curve and to detect the impairment of the cell contact system of the cell unit on the basis of the comparison.
- the device can in particular be set up (as part of the comparison) to determine the value of a deviation measure (e.g. a mean square deviation) for the deviation of the determined temporal profile from the reference profile. It can be determined that there is an impairment of the cell contact system of the cell unit if the value of the deviation measure is equal to or greater than a deviation threshold value. On the other hand, it can be determined that there is no impairment of the cell contact system of the cell unit if the value of the deviation measure is smaller than the deviation threshold value.
- a deviation measure e.g. a mean square deviation
- an impairment of the cell contact system can be detected in a particularly reliable manner.
- the device can be set up to detect an impairment of the cell contact system of the cell unit on the basis of the gradient of the temporal course of the voltage at the cell unit.
- the gradient of the temporal course can be compared with the reference gradient of the reference voltage curve in order to detect the impairment of the cell contact system in a particularly reliable manner.
- the device can be set up to determine reference data, in particular the reference curve of the voltage and/or the reference gradient of the reference curve of the voltage, for the charging process or the discharging process based on a (pre-determined) reference model for the voltage at the cell unit.
- the reference model can have one or more model parameters.
- the device can be set up to determine values for the one or more model parameters of the reference model for the charging process or the discharging process.
- the reference data can then be determined using the determined values for the one or more model parameters of the reference model.
- An impairment of the cell contact system of the cell unit can be detected in a particularly reliable manner on the basis of the reference data.
- the device can be set up to determine the temporal progression of the voltage at the cell unit for a sequence of consecutive charging processes and/or discharging processes of the energy storage device (using the voltage measuring unit). It can then be checked on the basis of the temporal progression of the voltage at the cell unit determined in each case as to whether or not there is an impairment of the cell contact system of the cell unit. In this way, a safe operation of the energy storage device can be ensured in the long term.
- the energy storage device typically comprises a plurality of cell units, which can be arranged electrically in series.
- the device can be set up to measure a time profile of the voltage at the respective cell unit for each of the plurality of cell units for the charging process or the discharging process of the energy storage device (using a dedicated voltage measuring unit). cell unit. It can then be checked based on the temporal progression of the voltage at the respective cell unit whether or not there is an impairment of the cell contact system of the respective cell unit. This enables comprehensive monitoring of the cell units of the energy storage system in order to further increase the safety of the energy storage system's operation.
- a (road) motor vehicle in particular a passenger car or a truck or a bus or a motorcycle
- a (road) motor vehicle in particular a passenger car or a truck or a bus or a motorcycle
- a method for detecting an impairment (in particular a contacting error) of a cell contacting system of a cell unit of an electrical energy storage device e.g. of a motor vehicle.
- the cell unit can comprise P storage cells arranged electrically in parallel, with P>1.
- the method includes determining, during a charging process or a discharging process of the energy storage device, a temporal progression of the voltage at the cell unit.
- the method further includes detecting an impairment of the cell contact system of the cell unit based on the temporal progression of the voltage at the cell unit.
- SW software program
- the SW program can be configured to be executed on a processor (e.g. on a control unit of a vehicle) and thereby to carry out the method described in this document.
- a storage medium is described.
- Storage medium may include a SW program which is set up to to be executed on a processor and thereby to carry out the method described in this document.
- Figure 1 shows an exemplary vehicle with an energy storage device for storing electrical energy
- Figure 2a shows an exemplary round cell
- Figure 2b shows an exemplary electrical energy storage device with a plurality of round cells
- Figure 2c shows exemplary cell units, each with a cell contacting system
- Figure 3a shows an exemplary measurement of the voltage on a cell unit
- Figure 3b shows exemplary temporal profiles of the voltage at a cell unit
- Figure 4 shows a flow chart of an exemplary method for detecting an impairment of the cell contact system of a cell unit of an electrical energy storage device.
- Fig. 1 shows an exemplary vehicle 100 with an electrical energy storage device 110 for storing electrical energy and an electric drive motor 102, which is operated with electrical energy from the energy storage device 110.
- the energy storage device 110 is typically installed within a housing in the vehicle 100.
- the energy storage device 110 typically comprises a plurality of storage cells, in particular round cells.
- Fig. 2a shows an exemplary storage cell 200, in particular a round cell, for an electrical energy storage device 110.
- the storage cell 200 has a circular cylindrical shape.
- a positive contact point 201 and a negative contact point 202 for electrically connecting the storage cell 200 are arranged on an end face of the storage cell 200.
- the positive contact point 201 can be formed by the end face of the cylindrical storage cell 200.
- the negative contact point 202 can be formed by a bolt that protrudes from the end face of the storage cell 200.
- the polarity of the contact points 201, 202 can be exactly the opposite.
- Fig. 2b shows an exemplary electrical energy storage device 110, which has a plurality of storage cells 200, which are arranged side by side (i.e., surface to surface), next to one another, in particular such that the contact points 201, 202 of the individual storage cells 200 are arranged on a uniform side (in Fig. 2b, on the top side).
- the energy storage device 110 can, for example, have 100 or more storage cells 200, or 1000 or more storage cells 200.
- the individual storage cells 200 can be electrically connected to one another via a cell contact system 210.
- the cell contact system 210 can, for example, have a frame with connecting lines or with connecting webs for electrically contacting the contact points 201, 202 of the individual storage cells 200.
- the cell contact system 210 can be arranged on the side of the storage cells 200 on which the contact points 201, 202 of the storage cells 200 are also arranged.
- the cell contact system 210 of an energy storage device 110 can be designed to group the storage cells 200 into several different cell units, wherein the individual cell units each comprise P storage cells 200 that are arranged parallel to one another, eg P>2. Furthermore, the individual cell units can be connected in series.
- the cell contact system 210 for the energy storage device 110 has individual cell contact systems 211 for the individual cell units 250, by means of which the storage cells 200 of the respective cell unit 250 are connected in parallel. Furthermore, the cell contact system 210 for the energy storage device 110 has contact elements 212, by means of which the individual cell units 250 are connected in series.
- the cell contact systems 211 of the individual cell units 250 of the energy storage device 110 may be impaired due to aging effects and/or due to mechanical influences. This document describes measures with which impairment of a cell contact system 211 of a cell unit 250 of an energy storage device 110 can be detected in an efficient and reliable manner.
- Fig. 3a illustrates an energy storage device 110 with several cell units 250 connected in series, each with P storage cells 200.
- the energy storage device 110 comprises measuring units 300 for the individual cell units 250.
- the measuring unit 300 for a cell unit 250 can be set up to record a measured value in relation to the electrical voltage 301 that is applied to the respective cell unit 250.
- the voltage 301 typically increases with increasing charge state of the cell unit 250 and/or decreases with decreasing charge state of the cell unit 250.
- a dedicated measuring unit the value of the total voltage 305 at the poles of the energy storage device 110 can be determined.
- the temporal progression (of the measured values) of the voltage 301 at the cell unit 250 can be recorded using the measuring unit 300 of a cell unit 250.
- Fig. 3b shows an example of a measured (temporal) progression 322 of the voltage 301.
- the measured progression 322 extends from a first voltage value 311, e.g. a lower voltage limit value (which corresponds, for example, to a first state of charge, approximately 0%) to a second voltage value 312, e.g. an upper voltage limit value (which corresponds, for example, to a second state of charge, approximately 100%).
- the measured progression 322 has a specific temporal gradient 324, wherein the temporal gradient 324 indicates the extent of the voltage change per unit of time (e.g. per second or per minute).
- An impairment of the cell contact system 211 of a cell unit 250 typically leads to the contact resistance between at least one storage cell 200 of the cell unit 250 and the cell contact system 211 increasing.
- the effective resistance of the affected storage cell 200 increases, which leads to the voltage 301 at the cell unit 250 increasing more quickly (with a constant charging current).
- the accelerated increase in the voltage 301 leads to the measured curve 322 having an increased temporal gradient 324.
- an impairment of the cell contact system 211 of a cell unit 250 of an energy storage device 110 can thus be detected in an efficient and reliable manner.
- Fig. 3b shows a temporal reference curve 321 of the voltage 301 for a cell unit 250 with a non-impaired cell contact system 211.
- the Reference curve 321 can have been determined specifically for the respective cell unit 250 and/or for the respective charging or discharging process.
- the reference curve 321 has a temporal reference gradient 323.
- the measured curve 322 can be compared with the reference curve 321, in particular the measured gradient 324 can be compared with the reference gradient 323 in order to detect an impairment of the cell contact system 211 of the cell unit 250 in a particularly reliable manner.
- the electrical voltages 301 of individual cells 200 and/or individual cell units 250 of a battery 110 can be monitored to ensure that one or more safety limits 311, 312 of the respective cell 200 or cell unit 250 are not violated. For example, excessive discharging and/or excessive charging can be prevented.
- This document describes a dynamic evaluation of the voltage 301 on a cell unit 250 in order to detect an impairment of the cell contact system 210, 211.
- a conclusion can be drawn in particular about damage in the battery 110 (e.g. a broken line).
- a safety measure can be initiated at an early stage, such as issuing an error message or warning to the user of the vehicle 100 in which the battery 110 is installed.
- the electrical voltages 301 of the individual logical cells (ie the individual cell units) 250 in a battery 110 can be dynamically monitored in order to detect damage.
- a plurality of cells 200 are usually electrically connected in parallel in individual cell units 250, which in turn are electrically connected in series in order to provide the required system voltages and operating currents for operating an electric drive machine 102 of a vehicle 100.
- a logical cell 250 can be a combination, in particular a p-combination, of a plurality of parallel individual cells 200. This form of connection of the individual cells 200 is ensured by the cell contact system (ZKS) 210, 211.
- the voltages 301 of the individual logical cells 301 and the total voltage 305 of the battery 110 can be recorded and evaluated by an internal voltage monitor 300.
- an internal voltage monitor 300 Several error cases are conceivable, which involve mechanical damage to the ZKS 210, 211 and the interruption of one or more electrical lines (see Fig. 3a).
- a sensor line to a voltage measuring unit 300 can be defective (see I in Fig. 3a).
- Such an error can be detected by the fact that the voltage values of the corresponding cell unit 250 are missing, but on the other hand the total voltage 305 of the battery 110 can be measured.
- a statistical evaluation of the voltage values 301 e.g. deviations of the min/max values from the mean value
- the gradients 324 of the voltage change during charging or discharging can be analyzed.
- the resulting logical cell 250 has a reduced capacity. Since the remaining cells 200 that are still in contact are now subjected to a greater load, the voltage curve 322 changes during charging or discharging. In particular, the logical cell 250 is fully charged or discharged more quickly.
- a digital twin (i.e. a reference model) of the cell voltages 301 can be determined and provided. Based on data from the assembly and/or configuration of the battery 110, a model of the battery 110 can be created and provided with initial values of the cell voltages 301. Other aspects such as the state of health of the cells 200, state of charge and/or current load over the service life of the battery 110 can also be included in the model. If the behavior predicted by the model deviates (in particular suddenly) from the measured value of the battery 110, this can be inferred to be a defect. The defect can be detected, for example, due to a change in the internal resistance of a logical cell 250 or due to a deviation in the course 322 of the cell voltage 310. The calculations for the model over the runtime can be carried out in a (vehicle-external) cloud and/or in the vehicle 100.
- Fig. 4 shows a flow chart of an exemplary (possibly computer-implemented) method 400 for detecting an impairment of the Cell contacting system 211 of a cell unit 250 of an electrical energy storage device 110.
- the cell unit 250 can comprise P storage cells 200 arranged electrically in parallel, with P>1.
- the method 400 includes determining 401, during a charging process or a discharging process of the energy storage device 110, the temporal profile 322 of the voltage 301 at the cell unit 250 (e.g. using a voltage measuring unit 300).
- the temporal profile 322 can indicate the voltage 301 at the cell unit 250 as a function of time (e.g. for 10 or more, or 50 or more consecutive points in time).
- the method 400 comprises detecting 402 a
- a reference profile 321 of the voltage 301 for the charging process or the discharging process can be determined and/or taken into account, wherein the reference profile 321 depends, for example, on the charging current or the discharging current.
- the reference profile 321, in particular the reference gradient 323 of the reference profile 321, can be taken into account when detecting an impairment of the cell contact system 211.
- an impairment of the cell contact system of a cell unit 250 of an electrical energy storage device 119 can be detected in an efficient and precise manner.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480017184.4A CN120836000A (zh) | 2023-03-24 | 2024-03-01 | 用于识别蓄电池的单体单元的单体触点接通系统的损坏的方法和装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023107407.5A DE102023107407A1 (de) | 2023-03-24 | 2023-03-24 | Verfahren und Vorrichtung zur Erkennung einer Beeinträchtigung des Zellkontaktiersystems einer Zelleinheit einer Batterie |
| DE102023107407.5 | 2023-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024199890A1 true WO2024199890A1 (de) | 2024-10-03 |
Family
ID=90361503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/055460 Ceased WO2024199890A1 (de) | 2023-03-24 | 2024-03-01 | Verfahren und vorrichtung zur erkennung einer beeinträchtigung des zellkontaktiersystems einer zelleinheit einer batterie |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN120836000A (de) |
| DE (1) | DE102023107407A1 (de) |
| WO (1) | WO2024199890A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150185289A1 (en) * | 2013-12-31 | 2015-07-02 | Chervon Intellectual Property Limited | Battery pack, method for detecting battery pack, charging assembly and electric tool |
| US20220179008A1 (en) * | 2019-10-28 | 2022-06-09 | Lg Energy Solution, Ltd. | Battery Diagnosing Apparatus and Method |
| US20220294028A1 (en) * | 2019-08-22 | 2022-09-15 | Panasonic Intellectual Property Management Co., Ltd. | Management device and power storage system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016207571A1 (de) | 2016-05-03 | 2017-11-09 | Robert Bosch Gmbh | Diagnoseverfahren, Betriebsverfahren für eine Batterieanordnung, Betriebsverfahren für eine Vorrichtung, Steuereinheit und Vorrichtung |
| DE102017220851A1 (de) | 2017-11-22 | 2019-05-23 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Bestimmen eines Funktionszustands eines elektrischen Energiespeichersystems sowie Funktionszustandsüberwachungssystem |
| DE102022200008A1 (de) | 2022-01-03 | 2023-07-06 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren und System zum effizienten Überwachen von Batteriezellen einer Gerätebatterie in einer geräteexternen Zentraleinheit mithilfe eines digitalen Zwillings |
-
2023
- 2023-03-24 DE DE102023107407.5A patent/DE102023107407A1/de active Pending
-
2024
- 2024-03-01 WO PCT/EP2024/055460 patent/WO2024199890A1/de not_active Ceased
- 2024-03-01 CN CN202480017184.4A patent/CN120836000A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150185289A1 (en) * | 2013-12-31 | 2015-07-02 | Chervon Intellectual Property Limited | Battery pack, method for detecting battery pack, charging assembly and electric tool |
| US20220294028A1 (en) * | 2019-08-22 | 2022-09-15 | Panasonic Intellectual Property Management Co., Ltd. | Management device and power storage system |
| US20220179008A1 (en) * | 2019-10-28 | 2022-06-09 | Lg Energy Solution, Ltd. | Battery Diagnosing Apparatus and Method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120836000A (zh) | 2025-10-24 |
| DE102023107407A1 (de) | 2024-09-26 |
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