EP4111520A1 - Vorrichtung sowie verfahren zur thermischen überwachung einer batterie - Google Patents
Vorrichtung sowie verfahren zur thermischen überwachung einer batterieInfo
- Publication number
- EP4111520A1 EP4111520A1 EP21708620.6A EP21708620A EP4111520A1 EP 4111520 A1 EP4111520 A1 EP 4111520A1 EP 21708620 A EP21708620 A EP 21708620A EP 4111520 A1 EP4111520 A1 EP 4111520A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cells
- battery
- evaluation unit
- transverse direction
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells 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
- 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
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- 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
Definitions
- the invention relates to a device and a method for thermal monitoring of a battery, in particular a lithium-ion battery to avoid a so-called “thermal runaway”.
- thermal runaway In the case of rechargeable batteries, especially lithium batteries and especially high-voltage vehicle batteries, which are used for an electric traction drive motor, the problem of the so-called “thermal runaway” is known. This is an exothermic chemical reaction within a battery cell which, due to a self-reinforcing and heat-producing chemical process, can lead to overheating and even to an explosion of the cell or a fire. Such a thermal runaway starts within a cell of a battery, for example due to an overload or a short circuit. If the resulting increased temperature exceeds a limit temperature, the self-reinforcing chemical process begins, which further heats up the temperature of the cell until the cell explodes or burns. This also affects neighboring cells, which can also start to burn due to the higher heat. The spreading fire can then spread very quickly to the entire battery and, in the case of a vehicle battery, to the vehicle.
- DE 102009034854 A1 provides for the change in at least one non-electrical physical quantity of the battery to be recorded as a measure of the state of charge.
- a change in volume or a change in pressure is detected.
- lithium batteries with graphite as the active material are monitored, in which a change in the state of charge leads to a change in volume.
- a housing delimiting a cell stack is provided with a plate which is movable on one side and which forms an electrode. When the volume changes, the distance to a second electrode changes by moving the movable plate. A change in capacitance caused by this is recorded.
- WO 2019 146960 A1 describes a pressure sensor in different design variants, which is attached to the outside of a battery and detects a change in pressure due to a change in volume.
- the invention is based on the object of specifying a device and a method for monitoring a battery, especially a rechargeable battery (accumulator) and in particular a lithium-ion battery to avoid thermal runaway.
- the device has a rechargeable battery (accumulator), in particular a lithium-ion battery, which has several, in particular cuboid-shaped cells, which are arranged next to one another in a transverse direction within a housing under a bias voltage.
- the device further comprises a measuring arrangement for detecting an expansion of at least one of the cells in the transverse direction.
- the measuring arrangement has several, in particular capacitive, sensors and an evaluation unit.
- the sensors are each arranged between two cells that are adjacent in the transverse direction and with the evaluation unit tied together.
- the measuring arrangement is now designed in such a way that when one of the cells expands in the transverse direction, this measuring arrangement detects a change in distance from the sensors and the evaluation unit.
- capacitive sensors the change in distance causes a change in capacitance, which is evaluated by the evaluation unit.
- the battery is monitored with regard to the development of a thermal runaway.
- a critical expansion or change in distance between two neighboring cells is detected that exceeds a critical value, this critical value being characteristic of the potential development of a thermal runaway.
- the measuring arrangement is designed in such a way that if a predefined, critical value is exceeded, a critical situation and, in particular, a potential thermal runaway is recognized.
- One countermeasure is, for example, to reduce the load on the battery or to disconnect the battery from the rest of the (on-board) network, especially of a motor vehicle.
- the device, especially the evaluation unit is designed and set up as a whole to carry out these steps.
- the critical value for the change in distance is generally greater than an operational change due to normal, operational temperature fluctuations within a permissible operating temperature range.
- a particular advantage of the measuring arrangement is that the, in particular, capacitive sensor results in an individual measurement between two cells that are adjacent in the transverse direction, so that each cell can be monitored individually. This is of particular importance.
- the batteries considered here are constructed in such a way that several cells are combined to form a cell module.
- the individual cells are typically interconnected in series so that the voltage of the cell module is the sum of the voltages of the individual cells.
- the cell module itself typically has a module housing.
- the individual cells combined in a cell module are typically held clamped against one another within the module housing. So there is already a certain pressure exerted on the individual cells in the initial state. This achieves the highest possible packing density of the individual cells and, overall, a compact design of the battery.
- Several such cell modules are in turn connected to one another to form the entire battery and are typically grouped together within a battery housing.
- the individual cell modules are typically also connected to one another in series in order to achieve the desired battery voltage.
- the battery voltage and the corresponding supply voltage for the electric drive motor is typically several 100 volts, typically greater than 300 volts and, for example, in the range between 300 and 1,000 Volt.
- cell is understood to mean both a single (galvanic) single cell which has a (single) cathode and a (single) anode and a separator arranged in between.
- the term “cell” is also understood to mean the common arrangement of several such individual cells, in which the layer structure cathode - separator - anode is repeated periodically. If several such individual cells are used to build a cell, the individual cells contained therein are preferably connected in parallel. The cell therefore has the voltage of a respective individual cell.
- a single cell typically has a voltage in the range of a few volts, for example in the range between 1 and 5 volts.
- Typical values for a single lithium cell are - depending on the materials used - between 2 and 4.5 volts.
- “cell” is understood to mean, in particular, a single cell.
- the housing of a cell hereinafter also referred to as a cell housing, consists, for example, of an inherently rigid and dimensionally stable, typically cuboid volume body.
- the housing of the cell consists of a flexible material, for example a (metal) foil.
- cell module is understood to mean, in particular, a cell module in which, for example, 4 to 20, and in particular 4 to 14 cells are connected and arranged in series with one another.
- the individual monitoring of a respective cell by measuring the change in distance between two transversely adjacent cells has the particular advantage of high sensitivity with regard to a malfunction of an individual cell, i.e. with regard to the potential development of a thermal runaway within a cell.
- the sensitivity is significantly higher. This is the only way to ensure reliable and safe predictive detection of a thermal runaway before it occurs.
- a respective sensor and the evaluation unit are designed to detect a change in distance between two cells in the range between 1 pm and 100 pm and in particular between 1 pm and 50 pm. This ensures a high level of sensitivity and even the slightest expansion as a result of increasing temperature can be reliably detected.
- Such an initial state is in particular a no-load state at a reference temperature of, for example, 20 °.
- This reference or base value is recorded and stored in particular by means of a calibration measurement.
- Such a calibration measurement follows, for example, for each individual battery or, alternatively, only on the basis of a reference battery to which the respective battery is structurally identical. In particular, therefore, only a relative measurement or a relative change is carried out / determined by the sensor and / or the evaluation unit, without an exact, absolute determination being required or being carried out.
- the sensor also has a thickness in the transverse direction in the range from 150 pm to 500 pm and in particular a thickness in the range between 200 to 400 pm and especially a thickness of 300 pm. As a result, the space required for the cell module is only slightly increased and a compact design is still ensured.
- the sensors are preferably flat, capacitive sensors.
- the area of the sensors corresponds for example to more than 5%, preferably more than 20% of a base area of the respective cells, which is oriented perpendicular to the transverse direction.
- a sensor is arranged between each pair of cells, so that a sensor is arranged between each pair of cells.
- the distance between two neighboring cells of a cell module is monitored with the aid of the measuring arrangement.
- the evaluation unit is designed to compare the measured values, that is to say specifically the (capacitance) changes, of the various sensors with one another. Furthermore, the evaluation unit is designed to monitor these measured values from the sensors with regard to an uneven change (compared to the base value mentioned), an uneven change in the measured values being assessed as exceeding the critical value and a corresponding countermeasure being initiated.
- the individual measured values of the sensors are therefore compared relative to one another. This is based on the consideration that, for example, a strong change in a sensor indicates that a cell is adjacent to this sensor is faulty. In contrast, sensors that are not assigned to defective cells would experience a significantly smaller change, so that a conclusion about a defective cell can be drawn from this relative comparison. If the term “non-uniform change” is used, this means that the changes between two sensors differ from one another by more than a permissible tolerance range, the tolerance range being, for example, 10%, 20% or 30% based on the change wearing.
- the individual evaluation of the individual sensors also enables the defective cell to be localized and is preferably also carried out by the evaluation unit.
- a detection unit in particular a temperature sensor, is additionally arranged for detecting a current operating temperature of the battery.
- the evaluation unit is also set up in such a way that the critical value is set as a function of the current operating temperature.
- the at least one temperature sensor is placed at a suitable measuring point directly on or in the battery.
- a plurality of temperature sensors are preferably provided and, in this case, a value derived from the plurality of measured temperatures, for example an average, is determined as the current operating temperature.
- the consideration of the current operating temperature and the setting of the critical value i.e. the value for the permissible change in the measured value of the sensor compared to its reference value, is based on the fact that the individual cells experience a permissible expansion during operation as a result of normal, operational temperatures.
- high load conditions especially during the charging process, lead to temperature increases and correspond to the expansion of the individual cells. These are therefore already taken into account by the evaluation unit by changing the critical value.
- overall higher values for the expansion are permissible, ie the critical value for the permissible change compared to the
- the reference value increases as the operating temperature rises. For example, a change of 20%, based on the reference value, can be caused solely by a normal operating temperature. However, if a change of 20% occurs when the battery is “cold”, this can already be an indication of a defective cell. Accordingly, as the operating temperature increases, a higher value is set for the critical value, from which an error is predicted if it is exceeded.
- a respective sensor is designed as a differential capacitor with two opposing base electrodes and with a measuring electrode arranged in between. This configuration enables a high level of sensitivity even with the smallest changes in distance.
- the base electrodes and the measuring electrodes are expediently designed as flat electrodes and arranged parallel to one another.
- the base electrode and the measuring electrode are arranged in a Z-shape.
- a Z-shaped differential capacitor is described, for example, in WO 2006/015565 A1.
- the base electrodes are at ground potential (ground) and the measuring electrode is connected to a measuring connection of the evaluation unit.
- a differential capacitor is formed by two capacitors connected in series. This increases the overall capacity and thus the sensitivity.
- shielding is achieved by these base electrodes at the same time.
- the above-described parallel arrangement of the electrodes is the preferred embodiment. This enables a particularly compact structure and even the smallest expansions of a cell and the resulting increase in pressure, which leads to minimal compression of the sensor, can therefore be reliably detected.
- the evaluation unit has in particular an oscillator, specifically an RC oscillator. Its resonance frequency shifts as a result of a change in capacitance of the capacitor formed by the sensor, so that an accurate detection of a change is guaranteed.
- an elastic, dielectric layer (made of a non-gaseous material) is arranged between the base electrode and the measuring electrode. This also defines an insulating spacer between the two electrodes and allows compression as a result of thermally induced expansion of the cells.
- the dielectric layer preferably has a thickness in the range from 100 ⁇ m to 200 ⁇ m.
- the properties of the capacitor (sensor) are influenced and can be adjusted as required.
- the electrodes in particular the base electrodes, are formed by metal foils, especially copper foils. In particular, these have a thickness in the range from only 50 to 80 ⁇ m.
- the evaluation unit is also arranged within a module housing which surrounds the multiple cells that are combined to form a cell module. Direct monitoring is achieved through this integral arrangement within the module housing.
- the individual evaluation units of the respective cell modules of the battery are in particular connected to a central unit, for example a battery management system. This is also a central evaluation unit, which is typically arranged directly on the battery or integrated into it.
- FIG. 1 shows a cell module with a plurality of cells integrated within a module housing with sensors arranged in between.
- FIG. 2 shows a battery with several of the cell modules shown in FIG. 1
- FIG. 3 shows a measuring arrangement with a first variant of a capacitive sensor
- FIG. 4 shows a measuring arrangement with a second variant of a capacitive sensor.
- the cell module 2 shown in FIG. 1 has a module housing 4 within which a plurality of cells 6 are arranged.
- the cell module 2 extends in a transverse direction 8 and the individual cells, which are preferably approximately cuboid, are arranged next to one another in this transverse direction 8.
- the module housing 4, viewed in the transverse direction 8, has side walls 10 which clamp the cells 6 between them in the transverse direction.
- a sensor 12 is arranged between each two adjacent cells 6. This is designed in particular as a capacitive sensor and specifically as a differential capacitor, as described in more detail in different variants of FIGS. 3 and 4.
- the individual sensors 12 are therefore clamped between two adjacent cells 6.
- the pressure exerted by the module housing 4 exerts a pressure on the sensors 12, shown by the first arrows 14, on the sensors.
- a total of four cells 6 are shown.
- Each cell 6 has a housing 16.
- a respective sensor 12 is therefore arranged and clamped between walls of adjacent housings 16.
- the respective sensor 12, viewed in the transverse direction 8, has a thickness of preferably 300 ⁇ m. This thickness also corresponds to a distance a between cells 6 that are adjacent to one another
- an evaluation circuit is indicated schematically for the middle sensor 12, which has an RC oscillator.
- the respective sensor 12 is in each case connected to a measuring connection 20 of the evaluation unit 18.
- a change in the capacitance of the sensor is caused by a change in the distance a.
- the senor 12 is designed as a differential capacitor with two opposite, flat base electrodes 22, a measuring electrode 24 arranged between them and a dielectric layer 26 arranged between two adjacent electrodes 22, 24.
- the two base electrodes 22 form outer electrodes which preferably lie directly on the wall of the respective housing 16, possibly only with an insulation layer interposed.
- the base electrodes 22 are flat, film-like elements made of metal, in particular of copper.
- the two base electrodes 22 are at a common base or ground potential.
- the two base electrodes 22 are designed in one piece and are formed with one another by a cross-connecting piece 28, which is shown curved in the exemplary embodiment in FIG. 1. When viewed in cross section, the base electrodes 22 therefore form a “U”.
- the measuring instrument arranged in between Selective electrode 24 runs parallel to the two base electrodes 22 and extends along a flat plane perpendicular to the transverse direction 8 and can therefore - viewed in cross section - be viewed as an “I”.
- the illustrated sensor 12 is therefore also referred to as “II sensor 12.
- the dielectric layers 26, like the base electrodes 22, are preferably formed in one piece and have a cross-connecting piece. They are therefore also U-shaped if viewed in cross section. Base electrodes 22 and the electrical layers are thus inserted into one another as (viewed in cross section) two U-shaped, one-piece structures.
- FIG. 2 As shown in Fig. 2, several derar term cell modules 2 are summarized together within a battery housing 32 and suitable interconnected to build a battery 30.
- the battery 30 has two connection poles 31 for connection in particular to a motor vehicle electrical system.
- the battery 30 is assigned a central evaluation unit 34, which is preferably arranged inside the battery housing 32.
- This central evaluation unit 34 is in particular a so-called battery management system.
- This central evaluation unit 34 is in particular connected to the individual evaluation units 18.
- the individual module-specific evaluation units 18 together with the central evaluation unit 34 functionally form an evaluation unit which is designed to monitor the battery, in particular with regard to the early detection of a thermal runaway.
- the individual sensors 12 together with the individual evaluation units 18 and possibly together with the central evaluation unit 34 form a measuring arrangement 36 which is designed for the predictive detection of an undesired thermal runaway.
- a thermal runaway arises from a malfunction within an individual cell 6, for example due to overload or an internal short circuit. This leads to thermal heating. If a limit temperature is reached, a chemical reaction occurs within the cell 6, which increases the cell temperature continues to fuel. Such a reaction is intensified by the increasing temperature. An impermissible change in temperature is indicated by a thermal expansion of the cell 6.
- Such an expansion of a cell 6 leads to an increased pressure or to an expansion in the direction of the second arrows 38, as shown in one of the cells 6 shown in FIG. 1.
- This (minor) expansion is detected by this cell 6, hereinafter referred to as faulty cell 6a.
- the expansion of this defective cell 6a leads to a reduction in the distance a to the neighboring cells and thus to a compression of the sensors 12 which are in contact with this defective cell 6a.
- This compression leads to a change in capacitance, which is detected by the evaluation unit 18, 34.
- This countermeasure consists, for example, in switching off the battery or at least in reducing the load on the battery, for example reducing a charging current or a current currently being output.
- the evaluation unit 18, 34 evaluates, in particular, the measurement results of the individual sensors 12 of a respective cell module 2 in parallel.
- the evaluation unit 18, 34 recognizes that the critical value has been exceeded and triggers the countermeasure if the relative change (change in distance, change in capacitance) of the individual sensors 12 deviate from one another over a tolerance range.
- the tolerance range is, for example, +/- 10%, +/- 20% or +/- 30%. This takes into account the fact that in the case of a single faulty cell 6a, initially only this cell 6a expands disproportionately (compared to the non-faulty cells 6) and therefore the sensors 12 adjacent to this faulty cell 6a in particular experience excessive compression. Different changes are therefore a Indicates the defective cell 6a. This is also specifically localized, since the sensors 12 adjacent to it show a disproportionate increase in capacity.
- the evaluation unit 18, 34 is also designed to take into account the temperature of the battery 30.
- at least one temperature sensor 40 is provided, which is shown by way of example in FIG. 2 as part of the central evaluation unit 34.
- a temperature sensor 40 is arranged, for example, on or in each cell module 2 or each cell 6.
- the critical value from which it is concluded that there is a malfunction varies as a function of the temperature detected by the temperature sensor 40. That is, the evaluation of whether a defective cell 6a is present generally takes place as a function of the detected current operating temperature of the battery 30 or at least the current operating temperature of the respective cell module 2 or the respective cell 6.
- Such a battery 30 is designed in particular as a high-voltage battery specifically for the electrical supply of an electric drive motor (traction motor) of an electric or hybrid vehicle (motor vehicle) and is arranged in such a vehicle.
- the voltage of the battery 30 is typically in the range of several 100 volts.
- FIG. 3 shows, in a greatly simplified manner, a measuring arrangement 36 with the previously described UI sensor 12 (differential capacitor) with an evaluation unit 18 connected to it.
- the dielectric layer 26 arranged between the electrodes 22, 24 is not shown.
- the two base electrodes 22 and the measuring electrode 24 are designed as flat electrodes and are arranged parallel to one another.
- the pressure exerted on the sensor 12 is illustrated by the arrows shown.
- the two base electrodes 22 are connected to ground potential.
- the measuring electrode 24 is connected to an evaluation circuit. This evaluation circuit emits a periodic alternating voltage signal as the output signal, the period of which depends on the capacitance. When the sensor 12 is compressed, its capacity increases, which leads to a change in the period.
- an alternative embodiment of the capacitive sensor 12 is Darge provides.
- the interposed measuring electrode 24 is not arranged in parallel but in an inclined manner, so that the three electrodes are arranged in an approximately Z-shape when viewed in cross section.
- the base electrodes 22 are electrically decoupled from the measuring electrode 24. That is, the connection piece between the measuring electrode 24 and the two adjacent base electrodes 22 is formed by an electrical insulator.
- the variant of the U1 sensor shown in FIG. 3 is the preferred configuration, since this - viewed in the transverse direction 8 - builds narrower and is therefore more suitable for the desired compact arrangement.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020202857.5A DE102020202857B4 (de) | 2020-03-05 | 2020-03-05 | Vorrichtung sowie Verfahren zur thermischen Überwachung einer Batterie |
| PCT/EP2021/054742 WO2021175704A1 (de) | 2020-03-05 | 2021-02-25 | Vorrichtung sowie verfahren zur thermischen überwachung einer batterie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4111520A1 true EP4111520A1 (de) | 2023-01-04 |
Family
ID=74797932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21708620.6A Withdrawn EP4111520A1 (de) | 2020-03-05 | 2021-02-25 | Vorrichtung sowie verfahren zur thermischen überwachung einer batterie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4111520A1 (de) |
| DE (1) | DE102020202857B4 (de) |
| WO (1) | WO2021175704A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU501378B1 (en) * | 2022-02-01 | 2023-08-02 | Iee Sa | Pressure Sensing Cell for Accurate Pressure Sensing in a Battery Pack |
| DE112022006011T5 (de) * | 2021-12-15 | 2025-02-27 | Iee International Electronics & Engineering S.A. | Druckmesszelle für genaues Druckmessen in einem Batteriesatz |
| CN117525540A (zh) * | 2022-07-29 | 2024-02-06 | 蔚来汽车科技(安徽)有限公司 | 一种锂离子电池热安全边界识别方法 |
| DE102024109079A1 (de) * | 2024-03-28 | 2025-10-02 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Überwachung einer Batterie, eine diesbezügliche Vorrichtung, eine Batterie und ein Kraftfahrzeug mit solcher |
| CN118362317B (zh) * | 2024-04-29 | 2025-05-13 | 中国汽车工程研究院股份有限公司 | 电动汽车热失控及致灾危害评估方法、系统及测试装置 |
| EP4661150A1 (de) * | 2024-06-07 | 2025-12-10 | AUMOVIO Germany GmbH | Batterieüberwachungseinrichtung und batterie mit batterieüberwachungseinrichtung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004039561B4 (de) | 2004-08-13 | 2006-08-24 | Intedis Gmbh & Co. Kg | Kapazitive Sensoreinrichtung |
| KR100889244B1 (ko) | 2005-04-20 | 2009-03-17 | 주식회사 엘지화학 | 압전 센서가 내장된 이차전지 모듈 |
| DE102009034854B4 (de) | 2009-07-27 | 2015-10-15 | Continental Automotive Gmbh | Anordnung und Verwendung einer Anordnung zur Durchführung eines Verfahrens zum Bestimmen eines Ladezustands |
| US9509020B1 (en) * | 2014-03-27 | 2016-11-29 | Amazon Technologies, Inc. | Volumetric battery health sensor |
| US9917335B2 (en) * | 2014-08-28 | 2018-03-13 | Apple Inc. | Methods for determining and controlling battery expansion |
| CN107004797B (zh) | 2014-12-10 | 2020-05-19 | 松下知识产权经营株式会社 | 电池 |
| DE102015211598A1 (de) | 2015-06-23 | 2016-12-29 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Batteriemanagementsystems |
| US10818978B2 (en) * | 2016-05-13 | 2020-10-27 | Nio Usa, Inc. | Battery module having a pressure sensor |
| KR102321418B1 (ko) * | 2017-03-10 | 2021-11-03 | 삼성전자 주식회사 | 압력 센서를 이용하여 배터리 부풂을 감지하는 방법 및 이를 사용하는 전자 장치 |
| KR102175734B1 (ko) | 2018-01-24 | 2020-11-06 | 주식회사 아모그린텍 | 배터리 압력 감지 센서 및 이를 구비한 단말기 |
-
2020
- 2020-03-05 DE DE102020202857.5A patent/DE102020202857B4/de active Active
-
2021
- 2021-02-25 EP EP21708620.6A patent/EP4111520A1/de not_active Withdrawn
- 2021-02-25 WO PCT/EP2021/054742 patent/WO2021175704A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020202857A1 (de) | 2021-09-09 |
| WO2021175704A1 (de) | 2021-09-10 |
| DE102020202857B4 (de) | 2025-07-24 |
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