WO2015043887A1 - Procédé de mémorisation d'un défaut d'un circuit de surveillance d'éléments et accumulateur lithium-ions - Google Patents

Procédé de mémorisation d'un défaut d'un circuit de surveillance d'éléments et accumulateur lithium-ions Download PDF

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Publication number
WO2015043887A1
WO2015043887A1 PCT/EP2014/068554 EP2014068554W WO2015043887A1 WO 2015043887 A1 WO2015043887 A1 WO 2015043887A1 EP 2014068554 W EP2014068554 W EP 2014068554W WO 2015043887 A1 WO2015043887 A1 WO 2015043887A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell monitoring
monitoring circuit
cell
sleep
lithium
Prior art date
Application number
PCT/EP2014/068554
Other languages
German (de)
English (en)
Inventor
Marc Heydemann
Volkher Hofmann
Joerg Christoph WILHELM
Holger Wetzel
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 WO2015043887A1 publication Critical patent/WO2015043887A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/10—Arrangements in telecontrol or telemetry systems using a centralized architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/88—Providing power supply at the sub-station
    • H04Q2209/883—Providing power supply at the sub-station where the sensing device enters an active or inactive mode
    • 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 method of storing a fault of a lithium-ion secondary battery in a fault memory. Furthermore, the invention relates to a lithium-ion battery.
  • an accumulator In electrically driven vehicles, an accumulator is typically used as the energy source. Frequently, lithium-ion batteries are used because they have the largest available energy density at the lowest weight. However, these batteries are very sensitive to overcharging as well as deep discharge. Overcharging above a certain voltage level per cell, typically around 4.25 volts, will make the cell unstable and may cause a self-boosting heating process (thermal
  • Accumulator is exhausted by the driving operation, eg as a result of longer diversions, increased energy consumption, malfunction of a controlled charging station or the like. This exhaustion of the accumulator manifests itself in that a lower voltage threshold of one or more cells is achieved, which by means of those associated with the cells
  • Cell monitoring circuits do not count as external consumers but remain connected to the respective electrochemical cells, even if e.g. a main contactor is open. Typically, the
  • Cell monitoring circuits not by the deep discharge protection, but by means of a sleep command in their sleep mode, which can fail. In this situation, the cell monitoring circuitry continues to consume power from the accumulator. In particular, if this takes place over a long period of time, there is an acute risk of total discharge, especially as the accumulator can already be in a state of maximum permissible discharge after a long driving operation anyway.
  • Controller sends, in particular, if it detects this, a
  • Cell monitoring circuit is erroneously not put into sleep mode, threatens a deep discharge, as described above. It is possible to send the sleep command with a confirmation request to a
  • the aforementioned method is carried out while a main switching device of the lithium-ion Accumulator, with the electric current flow can be interrupted to and from the lithium-ion battery is open.
  • a signal is preferably sent to the user via this event, in particular when the main switching device has been opened because there is a low charge state of the lithium ion accumulator, which is preferably communicated to the user.
  • Method is the number of sleep commands and / or
  • a cell monitoring circuit from which no acknowledgment has been received at the controller after a predefined number of sleep commands and / or acknowledgment requests may be forcibly disconnected from its cell to be monitored such that it is rejected by the cell
  • a disadvantage of the above-described method is that in the vehicle is incomprehensible, whether cell monitoring circuits defective and / or
  • Cell monitoring circuit proposed a lithium-ion battery in a fault memory.
  • the cell monitoring circuit monitors an electrochemical cell of the lithium ion secondary battery.
  • a controller sends a sleep command to at least one, preferably all of them
  • the sending of the sleep command is associated with an acknowledgment request sent approximately one by one or in the cell monitoring circuit in response to a sleep command
  • the controller may resend a sleep command, particularly to the cell supervisory circuitry that has not sent an acknowledgment to the previously sent sleep command. After a predefined number of sleep commands and / or acknowledgment requests to which no acknowledgment has been received, according to the invention an error information in the
  • Error memory stored preferably based on the error information, a specific defective cell monitoring circuit is identifiable.
  • An error information may mean, for example, that a
  • Method sequence is executed in particular when switching off an electric motor or a vehicle in which an electric motor is installed. Such a switching off of the vehicle or electric motor can also be carried out automatically.
  • the sleep state may be activated by the control device when end consumers in the vehicle, such as control modules or the like, supplied with power after the vehicle or the electric motor has been switched off by the lithium ion accumulator, have their power consumption in the vehicle
  • control device can detect the drop in utilization, whereupon the
  • Sleep command sends. It is also conceivable to send the sleep command when the power output of the battery drops below a predefined threshold.
  • the threshold is defined by the power consumption of the vehicle components at standstill of the vehicle.
  • the sleep command and / or the acknowledgment may be sent over a CAN bus, for example.
  • a time interval is waited for, which can be varied. In particular, it can be varied so that the time interval becomes shorter with the number of sent sleep commands.
  • the proposed method makes it possible to detect errors before a deep discharge occurs. In addition, there is a greater likelihood that an error will be corrected before total discharge occurs.
  • Number of sent sleep commands with the count stored. This can be done, for example, by software by storing the value in a variable, or by hardware, such as counter flip-flops. If this count value exceeds a predefined value, for example the values 3 or 4, then a forced shutdown does not yet take place in the
  • Sleep mode offset cell monitoring circuits for example, hardware by means of a relay or switch by interrupting the measurement and supply lines between the affected
  • an error information is stored in a fault memory which belongs to the control device of the accumulator and / or the fault information is stored in a fault memory which is part of a vehicle control unit.
  • a fault memory which belongs to the control device of the accumulator and / or the fault information is stored in a fault memory which is part of a vehicle control unit.
  • Error information is stored in both mentioned fault memories to provide more security through redundancy, for example against short circuits or overloads of the battery system.
  • the forced shutdown of cells forcibly turned off due to the failure of the cell monitoring circuits to enter sleep mode is reversed when an electric vehicle including the accumulator or an electric motor as a consumer is started Battery functionalities are checked.
  • Forced shutdown cell monitoring circuits again switched and even more, preferably all other electronic monitoring components from sleep mode into an activity mode. Such a review can be made especially for longer life.
  • the message is sent via mobile.
  • information is sent from the error memory, in particular which cell monitoring circuits are affected and what type of error is stored. With this information, a defective cell monitoring circuit can be replaced or repaired more easily.
  • Figure 1 is a schematic representation of a process flow of a
  • FIG. 1 schematically shows the sequence of a first embodiment of a method for storing a fault of a
  • the cell monitoring circuit of a lithium-ion battery.
  • the cell monitoring circuit is connected by means of power supply and / or measuring connections to a cell of the accumulator in order to monitor its state, in particular its cell voltage. From the cell monitoring circuit can via one or more
  • Signal connections state information of the cell are sent to a control device of the accumulator, in particular via CAN bus.
  • the Control device monitors the state of the accumulator by means of
  • the controller may send a sleep command to the cell monitoring circuitry to put it in a sleep mode in which its power consumption is reduced or prevented. This sleep mode can prevent the supply current to the cell monitoring circuits from charging in them
  • Such a situation may e.g. be critical if an electrically operable vehicle, in which the accumulator is installed, has consumed its energy up to a critical threshold.
  • the shutdown of the vehicle may be critical if the shutdown time is sufficient for the supply current for a cell monitoring circuit to bring the state of charge of a cell below a deep discharge threshold.
  • the method is triggered by switching off an electric motor supplied by the lithium ion secondary battery, for example because a vehicle in which the electric motor and the accumulator are installed should be switched off.
  • Embodiment is the step S13, in which the electric motor is turned off.
  • a subsequent step S14 further consumers, which are supplied from the lithium-ion battery, shut down. These are, for example, end users who are supplied with voltages in the low-voltage range. Shutting down reduces the power consumption of these consumers. The power consumption can be further reduced by a main switching device, which is the accumulator with his
  • step S4 the controller (BCU) sends a sleep command to each of the cell supervisory circuits. This is triggered in particular by the fact that the power consumption of
  • the controller sends in a step S4 a sleep command to the cell monitoring circuits to put them in sleep mode.
  • a step S5 expects the
  • Control means an acknowledgment signal from each
  • step S6 the control device switches itself into sleep mode in a step S6 and the method is ended. In this way, the power consumption is further reduced. If an acknowledgment signal is not received by each cell monitoring circuit, the method returns to step S4 via a feedback from step S5. In the feedback, a further step S7 is interposed, in which information on a number of
  • step S7 it is checked how often the sleep command has already been sent. If the sleep command has been sent less than X times, the process moves from step S7 to step S4 after a waiting time At, in which a re-sleep command is sent.
  • step S4 the loop from the steps S4, S5 and S7 is closed.
  • the waiting time At can be reduced each time a sleep command is sent again.
  • Each transmission and / or retransmission is stored, in particular in a variable or in a counter which operates in particular with flip-flops.
  • step S8 the method proceeds to step S8, in which a forced shutdown of
  • Cell monitoring circuits is effected, which are not yet in sleep mode. These are the cell monitoring circuits, one of which
  • the forcible shutdown can be effected via an interruption device with which a power supply between the accumulator and a cell monitoring circuit can be interrupted.
  • Interrupt device can be controlled by the control device, preferably independently of other processes.
  • signal lines are provided for this control, which are of the normal
  • an external receiver such as an emergency service, the battery manufacturer, a
  • step S15 following the forced shutdown, information about defective cell monitoring circuits is stored in a fault memory.
  • This error memory is preferably an error memory of the control device or of a vehicle control device. To ensure that this information is not lost, for example as a result of short circuits or overloads of the battery system, it is proposed to store the information redundantly in both said memories.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un procédé de mémorisation d'un défaut d'un circuit de surveillance d'éléments servant à surveiller au moins un élément électrochimique d'un accumulateur lithium-ions. Selon ce procédé, lorsque l'accumulateur lithium-ions passe en mode veille, un système de commande envoie (S4) une commande de mise en veille à un circuit de surveillance d'éléments. Cet envoi d'une commande de mise en veille par le système de commande au circuit de surveillance d'éléments s'accompagne d'une demande de confirmation au circuit de surveillance d'éléments et, en cas de non-réception (S5) d'une confirmation du circuit de surveillance d'éléments, le système de commande renvoie (S4) la commande de mise en veille et/ou la demande de confirmation après un intervalle de temps. Après un nombre prédéfini de commandes de mise en veille et/ou de demandes de confirmation pour lesquelles aucune confirmation n'a été reçue (S7), une information de défaut concernant le circuit de surveillance d'éléments est stockée (S15) dans une mémoire de défauts.
PCT/EP2014/068554 2013-09-25 2014-09-02 Procédé de mémorisation d'un défaut d'un circuit de surveillance d'éléments et accumulateur lithium-ions WO2015043887A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013219291.6 2013-09-25
DE102013219291.6A DE102013219291A1 (de) 2013-09-25 2013-09-25 Verfahren zum Speichern eines Fehlers eines Zellenüberwachungsschaltkreises und Lithium-Ionen-Akkumulator

Publications (1)

Publication Number Publication Date
WO2015043887A1 true WO2015043887A1 (fr) 2015-04-02

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Country Link
DE (1) DE102013219291A1 (fr)
WO (1) WO2015043887A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN111919329A (zh) * 2018-04-06 2020-11-10 株式会社日立制作所 蓄电系统
CN113370919A (zh) * 2020-03-09 2021-09-10 北京新能源汽车股份有限公司 一种车辆控制方法、装置、车辆及设备

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US20110313613A1 (en) * 2009-03-27 2011-12-22 Hitachi Vechicle Energy, Ltd. Electric Storage Device
DE102010053803B3 (de) * 2010-12-08 2012-02-23 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Verfahren zum Betrieb eines Bordnetzes eines Kraftfahrzeugs sowie danach arbeitendes Bussystem
DE102013201596A1 (de) * 2012-02-06 2013-08-08 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Fehlerdetektion und -abschwächung für eine verwaltung eines fahrzeuginternen lan-netzes

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JPH08123587A (ja) * 1994-10-27 1996-05-17 Canon Inc 携帯型情報処理装置
JP3546856B2 (ja) * 2001-04-25 2004-07-28 松下電器産業株式会社 電池パック及び電池パックの故障診断方法
JP4932026B1 (ja) * 2010-11-12 2012-05-16 シャープ株式会社 直流給電システム
JP5718731B2 (ja) * 2011-05-31 2015-05-13 ルネサスエレクトロニクス株式会社 電圧監視システム及び電圧監視モジュール
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110313613A1 (en) * 2009-03-27 2011-12-22 Hitachi Vechicle Energy, Ltd. Electric Storage Device
DE102010053803B3 (de) * 2010-12-08 2012-02-23 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Verfahren zum Betrieb eines Bordnetzes eines Kraftfahrzeugs sowie danach arbeitendes Bussystem
DE102013201596A1 (de) * 2012-02-06 2013-08-08 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Fehlerdetektion und -abschwächung für eine verwaltung eines fahrzeuginternen lan-netzes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111919329A (zh) * 2018-04-06 2020-11-10 株式会社日立制作所 蓄电系统
CN111919329B (zh) * 2018-04-06 2024-04-02 株式会社日立制作所 蓄电系统
CN113370919A (zh) * 2020-03-09 2021-09-10 北京新能源汽车股份有限公司 一种车辆控制方法、装置、车辆及设备

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