WO2024088683A1 - Detektionsvorrichtung für einen elektrischen energiespeicher eines kraftfahrzeugs mit dynamikplausibilisierung - Google Patents
Detektionsvorrichtung für einen elektrischen energiespeicher eines kraftfahrzeugs mit dynamikplausibilisierung Download PDFInfo
- Publication number
- WO2024088683A1 WO2024088683A1 PCT/EP2023/076731 EP2023076731W WO2024088683A1 WO 2024088683 A1 WO2024088683 A1 WO 2024088683A1 EP 2023076731 W EP2023076731 W EP 2023076731W WO 2024088683 A1 WO2024088683 A1 WO 2024088683A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- energy storage
- current
- cell voltage
- cell
- values
- 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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- 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
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- 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
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
-
- 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
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
-
- 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
Definitions
- the invention relates to a detection device for an electrical energy storage device of a motor vehicle for detecting a fault in at least one energy storage cell of a circuit of energy storage cells of the energy storage device.
- the detection device has a current sensor device for detecting current values of the circuit and a voltage sensor device for detecting cell voltage values of the energy storage cells.
- the invention also relates to a method for detecting a fault in an energy storage cell, an electrical energy storage device and a motor vehicle.
- the focus is on electrical energy storage devices that can be used, for example, as traction batteries for electrified motor vehicles.
- Such electrical energy storage devices usually have at least one circuit of energy storage cells that is arranged in the interior of a storage housing of the electrical energy storage device.
- the energy storage cell can degas, which transports heat and particles into the interior of the storage housing. This can damage other storage components, for example other energy storage cells. It is therefore desirable to be able to detect such faults or cell defects.
- the energy storage device is usually equipped with a detection device for monitoring the energy storage cells, which has sensor devices for detecting parameters of the electrical energy storage device.
- sensor devices are, for example, current sensor devices for detecting current values of the energy storage cells and cell voltage sensors for detecting cell voltage values of the energy storage cells.
- a defective energy storage cell can be detected by comparing the detected cell voltage values with a predetermined voltage target value.
- the voltage behavior in the unloaded state a defective energy storage cell is compensated by the other energy storage cells. This means that a fault cannot be detected or cannot always be detected by comparison.
- the voltage behavior of the energy storage cells can change due to age, so that the voltage target value must be adjusted over time to prevent a false diagnosis.
- additional sensor devices are usually provided, for example temperature sensor devices for detecting a temperature in the interior of the storage housing and/or the energy storage cells, pressure sensor devices for detecting a pressure in the interior of the storage housing, light sensor devices for detecting flames in the interior of the storage housing, etc., which primarily serve to observe fault characteristics that indicate an obvious defect in an energy storage cell.
- additional sensor devices increase the costs and weight of the electrical energy storage device.
- a detection device for an electrical energy storage device of a motor vehicle serves to detect a fault in at least one energy storage cell of a circuit of energy storage cells of the energy storage device.
- the detection device has a current sensor device for detecting current values of the circuit and a voltage sensor device for detecting cell voltage values of the energy storage cells.
- the detection device has a storage and evaluation device which is designed to receive the current values and the cell voltage values and to temporarily store them over a predetermined period of time, to compare a respective dynamic of cell voltage curves obtained from the temporarily stored cell voltage values of a period of time with a dynamic of the cell voltage curves obtained from the temporarily stored To compare the current values of the current curve obtained over a period of time and to use the comparison to detect a fault in at least one energy storage cell.
- the invention also includes a method for detecting a fault in at least one energy storage cell in a circuit of energy storage cells in an electrical energy storage device.
- current values of the circuit and cell voltage values of the energy storage cells are recorded. These current values and cell voltage values are received and temporarily stored over a predetermined period of time.
- a respective dynamic of cell voltage curves obtained from the temporarily stored cell voltage values of a period of time is then compared with a dynamic of the current curve obtained from the temporarily stored current values of the period of time, and a fault in at least one energy storage cell is detected based on the comparison.
- An electrical energy storage device comprises a circuit of electrical energy storage cells and a detection device according to the invention.
- the electrical energy storage device is in particular a high-voltage energy storage device and serves as a rechargeable traction battery for an electrified motor vehicle.
- the electrical energy storage device has a plurality of energy storage cells or battery cells, for example prismatic cells, round cells or pouch cells, which are interconnected and arranged in an interior of a storage housing of the electrical energy storage device.
- the circuit of energy storage cells preferably has at least one parallel circuit or a parallel connection of at least two energy storage cells.
- the electrical energy storage device has the detection device for monitoring the energy storage cells.
- the detection device is designed to detect an error in at least one energy storage cell, i.e. a cell defect, based on the measured current values of the energy storage cells and the measured cell voltage values of the energy storage cells.
- the detection device is designed to detect the error only based on the measured current values and the measured cell voltage values, without using sensor data from other sensor devices and without comparing the measured values with predetermined target values.
- the detection device has the voltage sensor device, which has in particular one voltage sensor for measuring cell-specific cell voltage values per energy storage cell, and the current sensor device, which has in particular at least one Current sensor for measuring a current flowing through the circuit. The current flowing through the circuit corresponds to a current flowing through the individual energy storage cells.
- the current values and cell voltage values recorded by the current sensor device and the voltage sensor devices are transmitted to the storage and evaluation device of the detection device and temporarily stored or buffered there for a predetermined period of time, for example for a maximum of a few seconds.
- the storage and evaluation device can, for example, be integrated into an energy storage internal control unit and be connected to the current sensor device and the voltage sensor device in terms of communication technology, for example via a cable.
- the storage and evaluation device has in particular a buffer or an intermediate storage device for temporarily storing the current values and cell voltage values, which is designed to store the current values and cell voltage values continuously over the predetermined period of time. Current and cell voltage values are therefore continuously stored in the buffer over the predetermined period of time, whereby the oldest value can be deleted again for each new, current value that arrives.
- the buffer therefore has in particular a fixed window width, whereby the window width corresponds to the time period.
- the buffer therefore contains the current current and cell voltage values as well as a predetermined number of previous current and cell voltage values recorded in the past.
- a current curve or current signal and cell voltage curves or cell voltage signals can be determined using the current values and cell voltage values temporarily stored over the period of time.
- the cell voltage curves are then compared with the current curve.
- the invention is based on the knowledge that the dynamics of the cell voltage curves in faultless energy storage cells should follow the dynamics of the current curve. If the dynamics of a cell voltage curve deviate from the dynamics of the current curve, this indicates a defect in the associated energy storage cell. For cell monitoring, the dynamics of the cell voltage curves are checked for plausibility using the dynamics of the current curve.
- the storage and evaluation device is designed to
- a positive gradient of the current signal, which results from increasing current values, should therefore be followed by a positive gradient of the cell voltage signal, which results from increasing cell voltage values, in the error-free case.
- a negative gradient of the current signal which results from decreasing current values, should be followed by a negative gradient of the cell voltage signal, which results from decreasing cell voltage values, in the error-free case. If the gradient of a cell voltage signal deviates in sign from the gradient of the current signal, at least partially, the error of the associated energy storage cell is recognized.
- the method carried out using the detection device in which only the dynamics of the current curve and the cell voltage curves are checked for plausibility in relation to one another for fault detection, is particularly advantageous because it is independent of age-related changes in the voltage behavior of the energy storage cells. This means that no target values need to be provided and continuously calibrated.
- the method also detects defects that could not be detected based on the voltage behavior alone due to the defect-compensating parallel connection of the energy storage cells.
- the invention also includes a motor vehicle with an electrical energy storage device according to the invention.
- the motor vehicle is an electrically driven motor vehicle in the form of an electric or hybrid vehicle and has the electrical energy storage device as a traction battery.
- Fig. 1 is a schematic representation of an electrical energy storage device of a
- Fig. 2a-2c Current and cell voltage curves of faultless energy storage cells of the electrical energy storage system.
- Fig. 3 Current and cell voltage curves of a faultless and a faulty energy storage cell.
- Fig. 1 shows an electrical energy storage device 1 for a motor vehicle.
- the electrical energy storage device 1 has a storage housing 2, in the interior 3 of which at least one circuit 4 made up of energy storage cells 5 is arranged.
- the electrical energy storage device 1 also has a detection device 7 which has a voltage sensor device 8 and a current sensor device 9.
- the voltage sensor device 8 here has a voltage sensor 10 for each energy storage cell 5 for measuring cell voltage values of the respective energy storage cell 5.
- the current sensor device 9 here has a current sensor 11 for each circuit 4 for measuring current values of the circuit 4.
- the detection device 7 also has a storage and evaluation device 12 which is coupled to the voltage sensor device 8 and the current sensor device 9 and to which the detected cell voltage values and current values are transmitted.
- the transmitted cell voltage values and current values are temporarily stored by the storage and evaluation device 12 over a predetermined time period ⁇ t1, ⁇ t2, ⁇ t3.
- Fig. 2a, Fig. 2b and Fig. 2c show a current profile I of the circuit 4 progressing with the current time t1*, t2*, t3* and two cell voltage profiles U1, U2 progressing with the current time t1*, t2*, t3 of two faultless Energy storage cells 5 over time t.
- a buffer window Pt1, Pt2, Pt3 of width B which runs from the current time t1*, t2*, t3* is shown, the width B of the buffer window Pt1, Pt2, Pt3 corresponding to the respective time period At1, At2, At3 within which the values measured by the sensor devices 8, 9 are temporarily stored in the storage and evaluation device 12 and analyzed.
- the current buffer window Pt1, Pt2, Pt3, which includes the current and cell voltage values of the current time t1*, t2*, t3* and the current and cell voltage values from the past in the current time period At1, At2, At3, is considered.
- a "past" of the current values and cell voltage values which covers a predetermined period of time is continuously evaluated.
- the dynamics of the cell voltage curves U1, U2 are compared with the dynamics of the current curve I.
- the dynamics of the cell voltage curves U1, U2 can also be compared with one another and thus checked for plausibility against one another.
- the dynamics of the cell voltage curves U1, U2 are the same as the dynamics of the current curve I.
- a sequence of the gradients of the cell voltage curves U1, U2 and the current curve I within the respective time period At1, At2, At3 can be considered.
- the gradients of the curves U 1, U2, I in section At1 a of the first time period At1 each have negative signs and in the following section At1b of the first time period At1 each have positive signs.
- the gradients of the curves U1, U2, I have negative signs and in the following section At1d they have positive signs again.
- the sequence of sections with negative and positive gradients for the cell voltage signals U1, U2 and the current signal I is also the same.
- all curves U1, U2, I have a gradient of 0, so that here too the gradients of all curves U1, U2, I have the same sign.
- the dynamics are the same and the energy storage cells 5 are classified as faultless.
- Fig. 3 shows the cell voltage curve U2' for a defective energy storage cell 5.
- the dynamics of the cell voltage curve U2' deviates from the dynamics of the current signal I. This is evident in the section At1d, in which the gradient of the current signal I is positive, while the gradient of the cell voltage signal U2' is at least partially negative.
- the gradient of the cell voltage signal U2' is therefore directed opposite to the gradient of the current signal I.
- This deviation of the dynamics of the cell voltage curve U2' from the dynamics of the current curve I is detected by the storage and evaluation device 12 and the energy storage cell 5 belonging to the cell voltage curve U2' is classified as faulty or defective.
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380052326.6A CN119604773A (zh) | 2022-10-25 | 2023-09-27 | 具有对动态性可信性分析的用于机动车的电气的蓄能器的探测设备 |
| US18/997,679 US20260063729A1 (en) | 2022-10-25 | 2023-09-27 | Detection Device for an Electrical Energy Store of a Motor Vehicle With Dynamic Plausibility Checking |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022128181.7A DE102022128181A1 (de) | 2022-10-25 | 2022-10-25 | Detektionsvorrichtung für einen elektrischen Energiespeicher eines Kraftfahrzeugs mit Dynamikplausibilisierung |
| DE102022128181.7 | 2022-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024088683A1 true WO2024088683A1 (de) | 2024-05-02 |
Family
ID=88287509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/076731 Ceased WO2024088683A1 (de) | 2022-10-25 | 2023-09-27 | Detektionsvorrichtung für einen elektrischen energiespeicher eines kraftfahrzeugs mit dynamikplausibilisierung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20260063729A1 (de) |
| CN (1) | CN119604773A (de) |
| DE (1) | DE102022128181A1 (de) |
| WO (1) | WO2024088683A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2397863B1 (de) * | 2010-06-15 | 2012-12-12 | Saft | Verfahren zur Überwachung des Zustands einer Batterie |
| US20140285156A1 (en) * | 2011-11-08 | 2014-09-25 | Shin-Kobe Electric Machinery Co., Ltd. | Battery-State Monitoring System |
| US20200025832A1 (en) * | 2018-07-23 | 2020-01-23 | Samsung Sdi Co., Ltd. | Battery control apparatus and method for detecting internal short of battery |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10208020A1 (de) | 2001-03-08 | 2002-09-12 | Daimler Chrysler Ag | Verfahren und Anordnung zur Bestimmung der Pufferwirkung einer Batterie |
| DE102011086043B4 (de) | 2011-11-09 | 2022-08-04 | Vitesco Technologies GmbH | Verfahren und Vorrichtung zum Klassifizieren der Funktions-fähigkeit einer Energiespeicherzelle |
| DE102018108738A1 (de) | 2018-04-12 | 2019-10-17 | Volkswagen Aktiengesellschaft | Verfahren zur Ermittlung eines Alterungszustandes einer Batterie, Computerprogramm, Speichermittel, Steuergerät und Fahrzeug |
| DE102018219124B4 (de) | 2018-11-09 | 2020-06-18 | Audi Ag | Verfahren zum Ermitteln eines Verschleißzustands eines elektrischen Energiespeichers in einem Kraftfahrzeug sowie Steuervorrichtung zum Durchführen des Verfahrens und Kraftfahrzeug |
-
2022
- 2022-10-25 DE DE102022128181.7A patent/DE102022128181A1/de active Pending
-
2023
- 2023-09-27 US US18/997,679 patent/US20260063729A1/en active Pending
- 2023-09-27 WO PCT/EP2023/076731 patent/WO2024088683A1/de not_active Ceased
- 2023-09-27 CN CN202380052326.6A patent/CN119604773A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2397863B1 (de) * | 2010-06-15 | 2012-12-12 | Saft | Verfahren zur Überwachung des Zustands einer Batterie |
| US20140285156A1 (en) * | 2011-11-08 | 2014-09-25 | Shin-Kobe Electric Machinery Co., Ltd. | Battery-State Monitoring System |
| US20200025832A1 (en) * | 2018-07-23 | 2020-01-23 | Samsung Sdi Co., Ltd. | Battery control apparatus and method for detecting internal short of battery |
Also Published As
| Publication number | Publication date |
|---|---|
| US20260063729A1 (en) | 2026-03-05 |
| CN119604773A (zh) | 2025-03-11 |
| DE102022128181A1 (de) | 2024-04-25 |
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