WO2013131687A1 - Élément galvanique et système de contrôle de batterie - Google Patents

Élément galvanique et système de contrôle de batterie Download PDF

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Publication number
WO2013131687A1
WO2013131687A1 PCT/EP2013/051484 EP2013051484W WO2013131687A1 WO 2013131687 A1 WO2013131687 A1 WO 2013131687A1 EP 2013051484 W EP2013051484 W EP 2013051484W WO 2013131687 A1 WO2013131687 A1 WO 2013131687A1
Authority
WO
WIPO (PCT)
Prior art keywords
acoustic wave
surface acoustic
sensor
galvanic
galvanic element
Prior art date
Application number
PCT/EP2013/051484
Other languages
German (de)
English (en)
Inventor
Remigius Has
Fabian Henrici
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2013131687A1 publication Critical patent/WO2013131687A1/fr

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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
    • H01M10/42—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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02872—Pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02881—Temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2697—Wafer or (micro)electronic parts
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5445—Local network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5458—Monitor sensor; Alarm systems
    • 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 present invention relates to a galvanic element, to a use of a surface acoustic wave sensor and to a battery system.
  • temperature and voltage of the battery are detected area by area to monitor an operating point of the battery. If the temperature is outside a tolerance range, damage to the battery can occur.
  • DE 10 2009 005 228 A1 describes a protective device for galvanic cells, which are interconnected via pole connections to a battery.
  • the protective device can be assigned to individual cells of the battery.
  • the protective device When the protective device is activated, the protective device removes a galvanic cell assigned to the protective device from the battery assembly.
  • Accumulator packages usually consist of several modules, which in turn consist of several cells, eg. As lithium-ion cells can be assembled. An effective battery management system becomes the function of the individual
  • the working temperature of the cell is z.
  • sensors can be used which detect the operating temperature of the battery cells. Monitoring the internal pressure of the cell is also crucial. Creeping pressure can indicate operational electrochemical aging or incipient leaking of the package. If a cell ages in a series connection, this will not only affect its performance.
  • Aging can initially increase an internal resistance of the individual cell. In the worst case, then a large part of the total voltage of the memory can fall over this single cell. In this case, the aged battery cell can be overloaded so far that cell-internal security measures can no longer sufficiently grab. A spontaneous pressure increase can be due to a strong short term overload of the
  • the pressure monitoring can already give a premature indication to turn off the energy storage, since the outgassing usually develops much faster than the temperature. Therefore, the monitoring of these factors with suitable pressure sensors and additionally or alternatively with suitable temperature sensors is essential.
  • suitable pressure sensors up to 200 individual cells are interconnected and packaged together. Usually the voltage is measured by each cell.
  • SAW sensors where SAW denotes a surface acoustic wave or surface acoustic wave
  • SAW denotes a surface acoustic wave or surface acoustic wave
  • the sensors can be integrated into existing battery designs.
  • a wireless or wired measured value transmission, for. B. via power line communication without an individual wiring is necessary. This saves on the one hand a cost, or allows a single-cell temperature and pressure measurement, which is not yet performed for cost reasons.
  • the temperature can be detected in all cells or modules of a battery pack, without this leading to excessive wiring.
  • a galvanic element having a first electrical connection and a second electrical connection has the following feature: a surface acoustic wave sensor for detecting at least one parameter of the galvanic element.
  • a galvanic element can be understood to mean an electrochemical element, for example a battery cell.
  • electrochemical reactions can take place between two reaction partners, by means of which an electrical cell voltage is provided between the two electrical connections of the galvanic element.
  • the reactants and arranged in the galvanic element parts of the electrical connections may be enclosed by a shell.
  • the two electrical connections can penetrate the shell.
  • the galvanic element can be connected via the electrical connections to a composite of a plurality of galvanic elements to form a battery.
  • a surface acoustic wave sensor can be understood as a device for detecting body waves.
  • the surface acoustic wave sensor may be arranged so that the surface acoustic wave sensor in direct Contact with at least one of the reactants.
  • the surface acoustic wave sensor may be disposed protected from the reactants.
  • the surface acoustic wave sensor may include a substrate on which electric wires, for example, planar lines for forming a SAW structure are arranged.
  • an activation pulse received by the surface acoustic wave sensor can be converted into structure-borne sound waves which propagate in the substrate.
  • the substrate may have a reflector structure for the structure-borne sound waves.
  • the reflector structure may be spaced from the SAW structure on the substrate or formed by a portion of the substrate.
  • the structure-borne sound waves are reflected and can propagate as reflected structure-borne sound waves in the substrate back to the SAW structure.
  • a characteristic of the reflected structure-borne sound waves may be dependent on the at least one parameter of the galvanic element.
  • the SAW structure the reflected structure-borne sound waves can be converted into an electrical signal that can be emitted by the surface acoustic wave sensor as a measurement signal.
  • a characteristic of the emitted electrical signal can thus be dependent on the at least one parameter of the galvanic element.
  • the electrical signal can thus be understood as an echo of the activation pulse influenced by the at least one parameter of the galvanic element.
  • the parameter may be, for example, an internal pressure and / or an internal temperature of the galvanic element.
  • the parameter can influence at least one physical property of the substrate of the surface acoustic wave sensor and thus change a transit time of a surface wave on the substrate.
  • Parameter for example, the internal pressure and / or the internal temperature can be represented.
  • the surface acoustic wave sensor may be connected to at least one of the electrical connections for transmitting data representing at least one parameter.
  • the sensor can be designed to transmit the acquired data via at least one of the electrical connections, for example to a control device arranged outside the galvanic element.
  • the sensor may be configured to receive electrical impulses for communication from the at least one of the electrical connections and to transmit further electrical impulses via the at least one of the electrical connections. see send out connections. In this way, the sensor can be contacted via the electrical connections of the galvanic element and use the electrical connections for communication.
  • the surface acoustic wave sensor may be connected by means of a capacitive coupling with at least one of the electrical connections.
  • the capacitive coupling can be formed by a capacitor arranged between an electrical connection and the sensor. Due to the capacitive coupling, a current flow between the electrical contact and the sensor can be prevented, however, pulses for communication can pass through the capacitive coupling.
  • the surface acoustic wave sensor may include an antenna.
  • the antenna can be arranged directly on the sensor.
  • the antenna may be electrically conductively connected to the SAW structure of the surface acoustic wave sensor.
  • an activation pulse can be received by the surface acoustic wave sensor via the antenna and can be transmitted again after passing through the surface acoustic wave sensor.
  • the antenna can be arranged completely or partially within the galvanic element. Alternatively, the antenna may be disposed on a surface of the galvanic element.
  • At least one of the electrical connections may be formed as an antenna for wireless transmission of the data representing the at least one parameter.
  • Acquired data can be transmitted wirelessly, for example to a control unit, via the antenna. Wireless transmission can reduce cabling overhead.
  • the surface acoustic wave sensor may be disposed in an interior of the galvanic element.
  • the substrate of the surface acoustic wave sensor may be in direct contact with reactants arranged in the galvanic element.
  • Communication with the surface acoustic wave sensor can be wireless or via a line, for example an electrical connection of the galvanic cell, through a sheath of the galvanic element.
  • the surface acoustic wave sensor may be disposed on a shell of the galvanic element.
  • the surface acoustic wave sensor may be configured to detect an internal pressure of the galvanic element via a deformation of the envelope.
  • the sensor can be arranged on an outer surface of the shell of the galvanic element.
  • the galvanic element By placing it outside the shell of the galvanic element, the galvanic element can be made with a higher power density because the sensor occupies no space within the shell.
  • the surface acoustic wave sensor may be configured to receive an activation pulse and to use the activation pulse to detect the at least one parameter.
  • the activation pulse can be received wirelessly or via a line, for example from a control unit.
  • the sensor Via the activation pulse, the sensor can be supplied with energy necessary for detecting the at least one parameter and transmitting the data representing the at least one parameter.
  • the sensor may be designed to emit an information representing the internal temperature and / or the internal pressure in response to the activation pulse.
  • the galvanic element may comprise a further surface acoustic wave sensor for detecting at least one parameter of the galvanic element. With another surface acoustic wave sensor, the other surface acoustic wave sensor sensor can be secured.
  • the two sensors can be arranged at different positions. For example, one of the sensors may be disposed inside the galvanic element and the other of the sensors may be disposed on an outer surface of the galvanic element.
  • the sensors may be configured to detect the same or the same or different parameters. For example, with one of the sensors the temperature and with the other sensor of the
  • the sensors can also have different measuring ranges.
  • the galvanic element can be monitored with a higher level of safety.
  • an acoustic surface wave sensor can advantageously be used for detecting at least one parameter of a battery cell.
  • the surface acoustic wave sensor can be arranged in an interior or on an outer side of the battery cell.
  • the battery cell may be a galvanic element.
  • a battery cell can be understood to mean an arrangement of one or more galvanic elements, which are enclosed by a housing.
  • a battery system has the following features: a battery having at least one battery cell with a galvanic element according to the approach presented here; and a controller configured to emit an activation pulse for the at least one surface acoustic wave sensor and to receive a signal from the at least one surface acoustic wave sensor.
  • the battery may have a housing in which a plurality of galvanic elements may be arranged.
  • the housing may have a device for tempering the galvanic elements.
  • the battery may have a first pole and a second pole.
  • 1 shows a representation of a galvanic element with a sensor within the galvanic element according to an embodiment of the present invention
  • 2 shows an illustration of a galvanic element with a sensor arranged on the galvanic element according to an exemplary embodiment of the present invention
  • FIG. 3 shows an illustration of a galvanic element with a sensor inside the galvanic element according to a further exemplary embodiment of the present invention
  • 4 is an illustration of a battery system according to an embodiment of the present invention
  • FIG 5 is an illustration of another battery system according to an embodiment of the present invention.
  • FIG. 6 shows an illustration of a battery system with a galvanic element with a sensor with capacitive coupling according to an embodiment of the present invention.
  • FIG. 1 shows an illustration of a battery cell or a galvanic cell 100 having a surface acoustic wave sensor 102 according to an embodiment of the present invention.
  • the surface acoustic wave sensor 102 is disposed inside the galvanic cell 100 and implemented as a radio sensor.
  • a positive pole 104 and a negative pole 106 are arranged as electrical connections.
  • the positive pole 104 and the negative pole 106 are represented as electrical conductors which are designed to introduce electrical energy into the galvanic element 100 or to discharge electrical energy from the galvanic element 100 by means of a passage through a shell of the galvanic element 100.
  • substances are arranged which function as reactants for an electrochemical reaction of the galvanic element.
  • the surface acoustic wave sensor 102 is disposed within the envelope embedded in the substances acting as reactants.
  • the sensor 102 is thus arranged inside the galvanic element 100.
  • the sensor 102 has two dipoles as antenna 108.
  • the antenna 108 is connected to two terminals of an intermediate finger transducer 110 (Interdigital Transducer, IDT).
  • IDT Interdigital Transducer
  • the intermediate finger transducer 1 10 is designed to be used Beginning of a request signal or activation pulse via the antenna 108, a substrate of the sensor 102, which consists of a piezoelectric single crystal 1 12 according to this embodiment, to excite surface vibrations.
  • the surface vibrations propagate as surface waves on the piezoelectric single crystal 1 12. In two different distances
  • U and L 2 to the intermediate finger transducer 1 10 reflectors 1 14 are arranged on the surface.
  • the surface wave will reflect to the intermediate finger transducer 110.
  • the intermediate finger transducer 110 is designed to convert the surface waves reflected at the reflectors 14 into a signal.
  • the signal is emitted via the antenna 108 as an electromagnetic wave.
  • a delay time between the receipt of the request signal and the transmission of the signal represents information about the environmental conditions, that is to say, for example, internal pressure and / or internal temperature at the sensor 102.
  • the sheath of the galvanic element 100 is in this embodiment at least partially transmissive to electromagnetic waves.
  • the request signal can reach the interior of the galvanic element 100 to the antenna 108.
  • the signal can reach the interior of the galvanic element 100 from the antenna 108.
  • Fig. 1 shows a schematic representation of a battery cell 100, z. B. a battery cell with a lithium-based reactants, with an integrated surface acoustic wave (SAW) sensor 102 for measuring pressure and additionally or alternatively a temperature of the cell 100.
  • the sensor 102 is located within the battery cell 100 and wirelessly gives the collected information to a control unit on.
  • the transmission of temperature and pressure representing signals from the battery cell 100 is possible according to this embodiment, because an incomplete metallic encapsulation of the outer wall of the battery cell 100 is present.
  • FIG. 2 shows an illustration of a galvanic element 100 with an acoustical surface wave sensor 102 according to one exemplary embodiment of the present invention.
  • the acoustic is Surface wave sensor 102 disposed on an outer surface, such as a shell of the galvanic element 100.
  • the embodiment shown in FIG. 2 corresponds to the embodiment shown in FIG.
  • the surface acoustic wave sensor 102 is configured to detect the internal temperature of the galvanic cell 100 and, additionally or alternatively, the internal pressure of the galvanic cell 100 through the shell of the galvanic cell 100.
  • the internal pressure of the galvanic element 100 influences a shape of the shell.
  • FIG. 2 shows a schematic illustration of a battery
  • Cell 100 eg, lithium having an integrated surface acoustic wave (SAW) sensor 102 for measuring pressure additionally or alternatively a temperature of the cell 100.
  • the sensor 102 is located on the battery cell 100 and outputs the sensed temperature, such as also the pressure wirelessly to the control unit on.
  • the pressure is detected via a perception of the expansion and / or the deformation of the outer wall of the battery cell 100.
  • SAW surface acoustic wave
  • FIG. 3 shows a representation of a galvanic element 100 with a surface acoustic wave sensor 102 according to an exemplary embodiment of the present invention.
  • the surface acoustic wave sensor 102 is disposed inside the galvanic element 100.
  • the surface acoustic wave sensor 102 is implemented as a radio sensor.
  • the representation essentially corresponds to the illustration shown in FIG. In contrast to the exemplary embodiment shown in FIG. 1, the sensor 102 shown in FIG. 3 does not have its own dipoles as antenna.
  • the intermediate finger transducer 1 10 is electrically conductively connected to the electrical terminals 104, 106 of the galvanic element 100.
  • the electrical connections 104, 106 are used by the sensor 102 as an antenna.
  • the sheath can be made impermeable to electromagnetic waves.
  • the surface acoustic wave sensor 102 in the form of a SAW sensor can be connected to the power terminals 104, 106, which at the same time serve as an antenna outside the battery cell 100, despite metallic encapsulation to the outside Spark the control unit.
  • the galvanic element 100 has a surface acoustic wave sensor 102 which is based on the
  • the surface acoustic wave sensor 102 is electrically conductively connected to the positive pole 104 and the negative pole 106 of the galvanic element.
  • the negative pole 106 is connected via an electrical line to the
  • Control unit 400 connected.
  • the controller 400 is configured to provide a request signal to the surface acoustic wave sensor 102 via at least one of the electrical connections 104, 106 of the galvanic element and to receive a signal from the surface acoustic wave sensor 102.
  • the control unit 400 may be connected to the positive pole 104 indirectly via a ring closure via further galvanic elements. In the embodiment shown in Fig. 4 is a direct connection of the
  • SAW sensor 102 which in turn may be located on or in the battery cell 100, is shown to the controller 400.
  • 4 shows, like the following FIG. 5, a SAW sensor 102 with a direct connection to the control unit 400.
  • the SAW sensor 102 is located on the battery cell 100.
  • FIG. 5 shows the SAW sensor 102. Sensor 102 within the battery cell 100. It can be connected via lines to the controller 400, or in each case only one of the terminals 104, 106. In each case, signals between the SAW sensor 102 and the control unit 400, depending on the embodiment over one or both of the ports 104, 106 are guided.
  • 5 shows an illustration of a battery system with a galvanic cell 100 and a control unit 400 according to an embodiment of the present invention.
  • the galvanic cell 100 includes a surface acoustic wave sensor 102 disposed inside the galvanic cell 100.
  • the surface acoustic wave sensor 102 is conductively connected to the electrical connections 104, 106 of the galvanic element 100 and connected via the positive pole 104 and additionally or alternatively the negative pole 106 to the control device 400 via an electrical line.
  • the sensor 102 By connecting the sensor 102 to the electrical connections 104, 106 of the galvanic element 100, the internal temperature and / or the internal pressure of the galvanic element 100 can be detected directly.
  • the galvanic cell 100 includes a surface acoustic wave sensor 102 disposed inside the galvanic cell 100.
  • the surface acoustic wave sensor 102 is connected via capacitive couplings to the electrical terminals 104, 106 of the galvanic element. Notwithstanding the embodiment shown in FIG. 5 is between the positive pole 104 and the intermediate finger transducer 1 10 and between the negative pole 106 and the intermediate finger transducer 1 10 each a capacity 600 is arranged.
  • the capacitances 600 prevent current flow from the negative pole 106 to the positive pole 104 through the sensor 102. Pulses, such as those of the request signal to the sensor 102 and an output signal of the sensor 102, may pass through the capacitances 600.
  • the sensor 102 may be directly connected to the controller 400.
  • the senor 102 may be wirelessly connected to the controller 400 because the electrical connections 104, 106 may act as antennas.
  • a SAW sensor 102 with a capacity connection via a subsequent power line communication is shown. Also a wireless version is possible.
  • the SAW sensor 102 may be arranged in or on the battery cell 100 as in the previously described embodiments.
  • Figures 1 to 6 show battery cells 100 with integrated SAW sensor 102 for pressure and temperature measurement of the battery cell 100 via the integrated SAW sensor 102.
  • a SAW sensor 102 can be applied. Furthermore, a significant performance increase of the battery can be achieved via the single battery cell monitoring.
  • coding can be carried out via an identifier in the propagation time of the reflected signals of the SAW sensors 102.
  • a SAW sensor 102 is placed in or on each cell 100 for temperature and / or pressure measurement.
  • a battery cell 100 is not completely encapsulated metallically, the measured value transmission z. B. done wirelessly through the cell wall.
  • a SAW sensor 102 may be connected to the power line, that is, supply line to the terminals 104, 106 with an antenna outside the battery cell 100.
  • an output signal of the sensor 102 may be wirelessly transmitted to the controller 400 again, although a metallic encapsulation is present.
  • Another possibility may be a direct connection of the SAW sensor 102 by the power lines 104, 106.
  • the measurement of the internal pressure in the battery cell 100 is simple.
  • the sensor 102 can be placed with measurement leads within a cell 102 and sealed.
  • the proposed SAW pressure sensor 102 is insensitive to the aggressive conditions, eg. As high-frequency radiation, in the (electro) chemical battery cell 100.
  • the SAW sensor 102 is inexpensive and technically easy to implement.
  • the pressure sensor 102 occupies a small space in the cell 100, whereby an energy density of the cell 100 only slightly decreases.
  • Another measurement option utilizes the effect that an increasing internal pressure leads to a swelling of the cell 100. That is, the internal pressure of the cells 100 becomes not measured directly, but can be measured indirectly via the deformation or geometry change of the cells 100 or the cell housing.
  • the SAW sensor 102 can be placed on the surface of the battery cell 100 for this purpose and can detect pressure and temperature from the outside.
  • each individual battery cell 100 can be individually monitored, but due to possible malfunction of the monitoring sensor 102, a redundancy of the measurement signals may also be useful.
  • the concepts presented can be combined to obtain a plausibility check. That is, it may be convenient not only to place a SAW sensor 102 in the battery cell 100, but to mount another SAW sensor 102 on the outer wall thereof.
  • the possibly increasing internal resistance can also be used as information for energy management.
  • an exemplary embodiment comprises a "and / or" link between a first feature and a second feature, then this is to be read so that the embodiment according to one embodiment, both the first feature and the second feature and according to another embodiment either only first feature or only the second feature.

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Abstract

L'invention concerne un élément galvanique (100) comprenant une première connexion électrique (104) et une deuxième connexion électrique (106). L'élément galvanique (100) est doté d'un capteur à ondes acoustiques de surface (102) afin de détecter au moins un paramètre de l'élément galvanique (100).
PCT/EP2013/051484 2012-03-05 2013-01-25 Élément galvanique et système de contrôle de batterie WO2013131687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012203456.0 2012-03-05
DE102012203456A DE102012203456A1 (de) 2012-03-05 2012-03-05 Galvanisches Element und Batteriekontrollsystem

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Publication Number Publication Date
WO2013131687A1 true WO2013131687A1 (fr) 2013-09-12

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PCT/EP2013/051484 WO2013131687A1 (fr) 2012-03-05 2013-01-25 Élément galvanique et système de contrôle de batterie

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WO (1) WO2013131687A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3382787A1 (fr) * 2017-03-31 2018-10-03 Samsung Electronics Co., Ltd. Dispositif de batterie, dispositif de surveillance de batterie et procédé de surveillance de batterie
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