DE102012001861A1 - High voltage battery for vehicle, has fuse in which irreversible change from initial state to another state is realized, irrespective of electrical current flow, when temperature of battery cells exceeds threshold level - Google Patents

High voltage battery for vehicle, has fuse in which irreversible change from initial state to another state is realized, irrespective of electrical current flow, when temperature of battery cells exceeds threshold level Download PDF

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Publication number
DE102012001861A1
DE102012001861A1 DE201210001861 DE102012001861A DE102012001861A1 DE 102012001861 A1 DE102012001861 A1 DE 102012001861A1 DE 201210001861 DE201210001861 DE 201210001861 DE 102012001861 A DE102012001861 A DE 102012001861A DE 102012001861 A1 DE102012001861 A1 DE 102012001861A1
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Germany
Prior art keywords
voltage battery
temperature
state
battery
temperature detection
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Withdrawn
Application number
DE201210001861
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German (de)
Inventor
Michael Drott
Andre Gronke
Markus Meiler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler AG
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Daimler AG
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 Daimler AG filed Critical Daimler AG
Priority to DE201210001861 priority Critical patent/DE102012001861A1/en
Publication of DE102012001861A1 publication Critical patent/DE102012001861A1/en
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/34Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current
    • H01M2/348Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current in response to temperature
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging
    • H01M10/443Methods for charging or discharging in response to temperature
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/63Control systems
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00Safety devices for primary or secondary batteries
    • H01M2200/10Temperature sensitive devices
    • H01M2200/103Fuse
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention relates to a high-voltage battery (10) for a vehicle, which has a plurality of battery cells (12). At least one device (18) for temperature detection experiences an irreversible change of state when a threshold value of the temperature is exceeded. In this case, the at least one device (18) for temperature detection is designed to irreversibly change from an initial state to a second state independently of an electrical current flow when the threshold value is exceeded. The invention also relates to a method for operating such a high-voltage battery (10).

Description

  • The invention relates to a high-voltage battery for a vehicle, which has a plurality of battery cells. The high-voltage battery further comprises at least one device For temperature detection, which occurs when a threshold value of the temperature is exceeded, an irreversible change in state. Furthermore, the invention relates to a method for operating such a high-voltage battery.
  • From the state of the art, about the US 2005/0233210 A1 or the US 2010/0028723 A1 , It is known to provide a fuse in the current path of a high-voltage battery. This interrupts the flow of current when it heats up so much due to the current flowing through it, that a fuse element of the fuse melts.
  • Based on this so-called tripping of the fuse can thus be found that a threshold value of the temperature has been exceeded, namely that which has led to melting of the fusible conductor.
  • Object of the present invention is to provide a high-voltage battery of the type mentioned above and a method for operating such a high-voltage battery, which or which allows a particularly safe handling of the high-voltage battery.
  • This object is achieved by a high-voltage battery having the features of patent claim 1 and by a method having the features of patent claim 7. Advantageous embodiments with expedient developments of the invention are specified in the dependent claims.
  • In the case of the high-voltage battery according to the invention, the at least one device for temperature detection is designed to irreversibly change from an initial state to a second state, independently of an electrical current flow when the threshold value is exceeded. This is based on the finding that it is possible by means of conventional fuses only with active, ie in operation current-providing or current-consuming high-voltage battery to detect thermal loads, which can potentially lead to an unsafe battery behavior.
  • Due to the independent of the passage of electrical current to a heating responsive device for temperature detection, a thermal load can also be detected in the passive battery state, so for example when the vehicle is stationary and the battery is not charged. The device for temperature detection is thus designed as a passive component, which does not require the passage of electrical current as a trigger to irreversibly change from the initial state to the second state.
  • A backup of the high-voltage battery, which may be necessary due to the thermal load, for example in the form of a shutdown of the same, can then be carried out or triggered. In addition, for service personnel, rescue services and the like operators a potentially unsafe battery condition can be seen, namely because the device for temperature detection is irreversibly transferred to the second state. The operator thus notices, on the basis of the device for temperature detection transferred to the second state, that the threshold value of the temperature has been exceeded, at least locally, and therefore potentially an unsafe battery can be present.
  • The fact that the overtemperature detection, as a result of a fire, regardless of the active operation of the high-voltage battery can be made, a long-term monitoring of the passive high-voltage battery is possible, for example, during storage, spare parts inventory or reuse. Furthermore, a safe and sustainable decommissioning of the high-voltage battery can take place if due to the thermal load situations have occurred that require a transport safety assessment. Unsafe high-voltage batteries can thus easily be distinguished from other high-voltage batteries in which the threshold value was not exceeded and thus the device for detecting the temperature is in its initial state.
  • This brings particularly low costs for the transport, the determination of findings or the rework on defective high-voltage batteries with it. By the device for temperature detection so a particularly safe handling of the high-voltage battery is possible.
  • Preferably, the at least one device for temperature detection is designed to change when exceeding a threshold value of the temperature from a temperature interval of 60 ° C to 120 ° C in the second state. This ensures that the high-voltage battery was not exposed to temperatures beyond which the safety of components of the high-voltage battery could possibly be restricted. This is especially true when the device for temperature detection when exceeding a threshold value of the temperature from the temperature interval of 80 ° C to 100 ° C changes from the initial state to the second state.
  • The exceeding of the threshold value of the temperature can be detected particularly reliably if a plurality of temperature detection devices are arranged at mutually different installation locations in the high-voltage battery. This also makes it possible to determine in homogeneous temperature loads of the high-voltage battery, so if it has come only locally to a warming, in which the threshold value of the temperature has been exceeded. The devices for temperature detection can also be provided redundantly, so that at least two such devices are present at the same location.
  • Furthermore, it can be provided that, in order to increase the reliability of detection and to increase the robustness of the detection, various devices for temperature detection in the high-voltage battery are arranged on the basis of their functional principle.
  • For example, the at least one device for temperature detection in the second state may have a different color than in the initial state. In particular, such color changes can take place at different temperatures from one another, so that, depending on the exceeded threshold value of the temperature, respective temperature detection devices trigger different temperature changes.
  • The at least one device for temperature detection may further be deformed in the second state relative to the initial state, for example in the manner of a bimetal, which deforms under temperature load, in which case it is ensured that during the subsequent drop in temperature, the bimetal not his original shape.
  • In a further advantageous embodiment of the invention, at least one component of the at least one device for temperature detection when changing to the second state undergoes a change in the state of aggregation, which is at least indirectly recognizable. For example, the melting of the component may result in a change in the appearance of the device. This altered appearance then suggests that the temperature threshold has been exceeded at the installation site of the device. Also, the heating that results in exceeding the threshold temperature may cause the gas bubble of the temperature detection device to expand, which in turn results in the escape of a liquid or solid from the device.
  • The at least one device for temperature detection can be arranged in a line for monitoring connections of the high-voltage battery and / or in a pre-charge line of the high-voltage battery and / or in a line for driving at least one contactor of the high-voltage battery. Furthermore, an arrangement in a low-voltage line is possible which serves to supply a control device of the high-voltage battery, and / or an arrangement in a line which serves for the insulation measurement of the high-voltage battery. If the device for temperature detection is arranged in a measuring line for a current measurement and / or in a line for detecting a temperature and / or voltage of the battery cells of the high-voltage battery, it is particularly easy and easy to determine whether the threshold value of the Temperature was exceeded.
  • In the method according to the invention for operating a high-voltage battery having a plurality of battery cells for a vehicle, at least one device for temperature detection is irreversibly transferred from an initial state to a second state due to exceeding a threshold value of the temperature. In this case, the at least one device for temperature detection changes independently of an electrical current flow when the threshold value is exceeded from the initial state to the second state. This allows a particularly safe handling of the high-voltage battery, since the irreversible change to the second state for an operator is easily recognizable.
  • The advantages and preferred embodiments described for the high-voltage battery according to the invention also apply to the method according to the invention.
  • The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the figure description and / or shown alone in the figure can be used not only in the respectively specified combination but also in other combinations or alone, without the scope of To leave invention.
  • Further advantages, features and details of the invention will become apparent from the claims, the following description of preferred embodiments and from the drawing.
  • This shows schematically a high-voltage battery, in which at a plurality of installation locations, a fuse is provided which triggers regardless of a current flow through the high-voltage battery when a threshold value is exceeded.
  • The figure shows schematically a high-voltage battery 10 a vehicle, which one or in other embodiments a plurality - stack of battery cells 12 includes. The battery cells 12 can be designed in this case in particular as lithium-ion cells. In one of the battery cells 12 to an electrical connection 14 the high-voltage battery 10 leading line is a high-voltage backup 16 arranged, which interrupts the circuit as an overcurrent protection device, when in operation of the high-voltage battery 10 a current of great magnitude occurs. This high-voltage backup 16 solves only in active operation of the high-voltage battery 10 off, so when it is unloaded or loaded.
  • In the present case are as further means for temperature detection one or - as shown in the embodiment several - fuses 18 provided which trigger regardless of whether the high-voltage battery 10 is active or not. Rather, these devices are designed for temperature detection as passive components, which are also in a high-voltage battery located in a warehouse 10 allow to determine if this high-voltage battery 10 was exposed to undesirable thermal stress which could potentially have led to unsafe battery performance.
  • Such a fuse 18 can for example be in an interlock line 20 the high-voltage battery 10 be arranged, which serves as a signal line to determine whether in the range of connections 14 . 22 the high-voltage battery 10 open switches or a cable break are present. A fuse 18 However, it can also be used in a precharge circuit 24 be arranged, ie in a line branch, in which a high resistance ensures that at too high voltage of the high-voltage battery 10 Voltage drops, and which is then bypassed, if no damage from with the high-voltage battery 10 to be connected to electrical or electronic components is more to be feared.
  • Another option is a fuse 18 in lines 26 to arrange over which shooter 28 . 30 the high-voltage battery 10 be controlled. These lines 26 are as well as the Interlockleitung 20 with a control unit 32 the high-voltage battery 10 coupled, which is a battery management unit 34 and a monitoring device 36 for security surveillance.
  • To power the controller 32 with electricity from the electrical system is a low-voltage line 38 provided, in which also a fuse 18 can be arranged. In addition, it is possible in a line 40 , which is the insulation measurement of the high-voltage battery 10 serves, and which the resistance between the positive pole and a housing 42 the high-voltage battery 10 as well as between the negative terminal and the housing 42 measures, a fuse 18 provided. A fuse 18 can furthermore in a measuring line 44 for a current measuring device 46 be arranged, which also with the control unit 32 connected is.
  • Furthermore, in the present example, fuses 18 shown in lines which a voltage measuring device 48 or a temperature measuring device 50 are assigned, so the detection of voltage and temperature of the battery cells 12 serve.
  • Instead of existing safety circuits for the integration of the fuse 18 However, it can also be provided in the same, the fuse 18 or such a device for temperature detection in a specially for this purpose to the control unit 32 to arrange connected line.
  • Additionally or alternatively to the fuses exemplified 18 Color indicators can be used as temperature detection devices which show a color change when a temperature threshold is exceeded.
  • The said devices for temperature detection have in common that they are the occurrence of thermal stress on the high-voltage battery 10 can detect even when there is no electrical current flow. In these devices for temperature detection, it is therefore not an excessive current flowing through them, which ensures the irreversible transfer of the same from an initial state to a second state. Such passive components thus enable, in particular, long-term monitoring of the high-voltage battery 10 and overtemperature detection regardless of the active operation of the high-voltage battery 10 ,
  • If due to the exceeding of the threshold value of the temperature, a change of state of the device for temperature detection, such as the fuse 18 has set, so this change from the initial state to the second state is irreversible and therefore easy for an operator to detect. If the presence of the second condition is noticed, at the fuse 18 that is, the melting of a corresponding temperature-sensitive element of the fuse 18 So this is a clear indication that the high-voltage battery 10 is to be examined more closely. In this case, a self-diagnosis is preferably possible, for example via a measurement of the internal resistance.
  • In particular, devices for temperature detection of different types can be used in order to ensure the detection of temperature loads on the high-voltage battery 10 to increase.
  • The high-voltage battery 10 further includes a cooling port 52 over which into a cooling circuit 54 the high-voltage battery 10 a cooling liquid or a refrigerant can be introduced. Another inlet 56 or outlet is intended for pressure equalization. A bursting device 58 ensures that due to a fault occurring too high internal pressure of the high-voltage battery 10 can be reduced. Via a CAN bus 60 a communication takes place between the control unit 32 the high-voltage battery 10 and other components of the vehicle.
  • LIST OF REFERENCE NUMBERS
  • 10
    High-voltage battery
    12
    battery cell
    14
    connection
    16
    High-voltage fuse
    18
    fuse
    20
    Interlock
    22
    connection
    24
    precharge circuit
    26
    management
    28
    contactor
    30
    contactor
    32
    control unit
    34
    Battery management unit
    36
    monitoring device
    38
    Low voltage cable
    40
    management
    42
    casing
    44
    Measurement line
    46
    Current measurement device
    48
    Voltage measuring device
    50
    Temperature measuring device
    52
    cooling connection
    54
    Cooling circuit
    56
    inlet
    58
    bursting device
    60
    CAN bus
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • US 2005/0233210 A1 [0002]
    • US 2010/0028723 A1 [0002]

Claims (7)

  1. High-voltage battery for a vehicle, having a plurality of battery cells ( 12 ) and at least one device ( 18 ) for temperature detection, which undergoes an irreversible change of state when a threshold value of the temperature is exceeded, characterized in that the at least one device ( 18 ) is designed for temperature detection to irreversibly change from an initial state to a second state, regardless of an electrical current flow when the threshold value is exceeded.
  2. High-voltage battery according to claim 1, characterized in that the at least one device ( 18 ) is designed to detect the temperature when exceeding a threshold value of the temperature from a temperature interval of 60 ° C to 120 ° C, in particular from 80 ° C to 100 ° C, to change to the second state.
  3. High-voltage battery according to claim 1 or 2, characterized in that a plurality of devices ( 18 ) for temperature detection at different installation locations in the high-voltage battery ( 10 ) are arranged.
  4. High-voltage battery according to one of claims 1 to 3, characterized in that the at least one device ( 18 ) for temperature detection in the second state has a different color than in the initial state and / or is deformed relative to the initial state.
  5. High-voltage battery according to one of claims 1 to 4, characterized in that at least one component of the at least one device ( 18 ) is designed for temperature detection such that when changing into the second state undergoes a change in the state of aggregation, which is at least indirectly recognizable.
  6. High-voltage battery according to one of claims 1 to 5, characterized in that the at least one device ( 18 ) for temperature detection - in a line ( 20 ) for monitoring connections ( 14 . 22 ) of the high-voltage battery ( 10 ) and / or - in a pre-charge line ( 24 ) of the high-voltage battery ( 10 ) and / or - in one line ( 26 ) for driving at least one contactor ( 28 . 30 ) of the high-voltage battery ( 10 ) and / or - in a for supplying a control device ( 32 ) of the high-voltage battery ( 10 ) designed low-voltage line ( 38 ) and / or - in one line ( 40 ) for insulation measurement of the high-voltage battery ( 10 ) and / or - in a measuring line ( 44 ) for a current measurement and / or - in a line for detecting a temperature and / or a voltage of the battery cells ( 12 ) of the high-voltage battery ( 10 ) is arranged.
  7. Method for operating a high-voltage battery ( 10 ) for a vehicle having a plurality of battery cells ( 12 ), in which at least one device ( 18 ) for temperature detection due to exceeding a threshold temperature is irreversibly transferred from an initial state to a second state, characterized in that the at least one device ( 18 ) for temperature detection, regardless of an electric current flow when the threshold value is exceeded, changes from the initial state to the second state.
DE201210001861 2012-02-01 2012-02-01 High voltage battery for vehicle, has fuse in which irreversible change from initial state to another state is realized, irrespective of electrical current flow, when temperature of battery cells exceeds threshold level Withdrawn DE102012001861A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210001861 DE102012001861A1 (en) 2012-02-01 2012-02-01 High voltage battery for vehicle, has fuse in which irreversible change from initial state to another state is realized, irrespective of electrical current flow, when temperature of battery cells exceeds threshold level

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210001861 DE102012001861A1 (en) 2012-02-01 2012-02-01 High voltage battery for vehicle, has fuse in which irreversible change from initial state to another state is realized, irrespective of electrical current flow, when temperature of battery cells exceeds threshold level
PCT/EP2013/000160 WO2013113473A1 (en) 2012-02-01 2013-01-19 High-voltage battery for a vehicle and method for operating a high-voltage battery

Publications (1)

Publication Number Publication Date
DE102012001861A1 true DE102012001861A1 (en) 2012-09-06

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Country Status (2)

Country Link
DE (1) DE102012001861A1 (en)
WO (1) WO2013113473A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014200262A1 (en) * 2014-01-10 2015-07-16 Robert Bosch Gmbh Battery system with a battery that is connectable to at least one of its high-voltage terminals via a contactor, and method for switching such a contactor
DE102014200265A1 (en) * 2014-01-10 2015-07-16 Robert Bosch Gmbh Battery system with a high-voltage battery and a protective circuit and method for monitoring the functional state of a protective circuit for a high-voltage battery
DE102014201196A1 (en) * 2014-01-23 2015-07-23 Robert Bosch Gmbh Method for operating a battery management system and battery management system
EP3121056A1 (en) * 2015-07-20 2017-01-25 LSIS Co., Ltd. Battery disconnect unit

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US20050233210A1 (en) 2003-12-18 2005-10-20 Nissan Motor Co., Ltd. Battery
US20100028723A1 (en) 2008-07-30 2010-02-04 Chaz Haba Power cell apparatus with three dimensional interconnect

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JP3478785B2 (en) * 2000-07-21 2003-12-15 松下電器産業株式会社 Thermal fuse and battery pack
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014200262A1 (en) * 2014-01-10 2015-07-16 Robert Bosch Gmbh Battery system with a battery that is connectable to at least one of its high-voltage terminals via a contactor, and method for switching such a contactor
DE102014200265A1 (en) * 2014-01-10 2015-07-16 Robert Bosch Gmbh Battery system with a high-voltage battery and a protective circuit and method for monitoring the functional state of a protective circuit for a high-voltage battery
US10220708B2 (en) 2014-01-10 2019-03-05 Robert Bosch Gmbh Battery system having a battery which can be connected by at least one of its high-voltage terminals via a contactor, and method for switching such a contactor
DE102014201196A1 (en) * 2014-01-23 2015-07-23 Robert Bosch Gmbh Method for operating a battery management system and battery management system
EP3121056A1 (en) * 2015-07-20 2017-01-25 LSIS Co., Ltd. Battery disconnect unit
US10250047B2 (en) 2015-07-20 2019-04-02 Lsis Co., Ltd. Battery disconnect unit

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