• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for monitoring a liquid-cooled charging cable of a charging station for a traction battery of an electrically operated motor vehicle, with a fall below a minimum permissible bending radius of the charging cable being detected and the falling below the minimum permissible bending radius being displayed to a user or charging point operator or service employee.
    公开号:CH717001A2
    申请号:CH01178/20
    申请日:2020-09-18
    公开日:2021-06-30
    发明作者:Metzger Christian
    申请人:Porsche Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for monitoring a liquid-cooled charging cable of a charging station for a traction battery of an electrically operated motor vehicle, such a liquid-cooled charging cable and a charging station for a traction battery of an electrically operated motor vehicle comprising such a charging cable.
    Charging cables with which an electrical connection between a charging station and the traction battery of the motor vehicle can be made for the purpose of charging the traction battery are known from the prior art.
    Charging cables can either be uncooled or include cooling, in particular active cooling. Due to normative requirements, uncooled charging cables usually have a very high effective weight and low flexibility. Active cooling can take the form of liquid cooling. The charging cable can be liquid-cooled in this way. Such a liquid-cooled charging cable is known, for example, from the publication DE 20 2015 009 531 U1.
    Such liquid-cooled charging cables usually have a coolant circuit which can extend over the entire length of the charging cable. Such a coolant circuit can, however, be damaged if the charging cable falls below a minimum permissible bending radius, which can result in leakage of the coolant. Furthermore, falling below the permissible minimum bending radius, in particular in the area of a plug connector of the charging cable, can also impair the protection against accidental contact of a plug connector of the charging cable.
    It is the object of the present invention to propose a method for monitoring a liquid-cooled charging cable, which reduces the risk of leakage of coolant, in particular the risk of an unconscious leakage of coolant and a possible associated risk of injury.
    The object is achieved by a method according to claim 1, a liquid-cooled charging cable according to claim 8 and a charging station according to claim 12.
    In the method according to the invention for monitoring a liquid-cooled charging cable of a charging station for a traction battery of an electrically operated motor vehicle, falling below a minimum permissible bending radius of the charging cable is detected and the falling below the minimum permissible bending radius is displayed to a user or charging point operator or service employee and / or a measure is taken to protect the user.
    [0008] The user or charging point operator or service employee is preferably shown that the minimum permitted bending radius was not reached in previous charging cycles.
    In a preferred embodiment, a bending radius of the charging cable is measured continuously and / or cyclically and the measured bending radius is compared with the minimum permissible bending radius of the charging cable, with a user or charging point operator or service staff being displayed if the minimum permissible bending radius is not reached the measured bending radius is smaller than the minimum permissible bending radius.
    [0010] The fall below the minimum permissible bending radius is preferably carried out by evaluating a change in coolant pressure in a cooling system of the liquid-cooled charging cable.
    In a preferred embodiment, the undershooting of the minimum permissible bending radius is detected by evaluating at least one strain gauge, at least one fiber optic sensor, at least one piezo element and / or at least one piezoceramic coating of the liquid-cooled charging cable.
    A period of time is preferably measured during which the minimum permissible bending radius of the charging cable is not reached.
    In a preferred embodiment, a charging process of the traction battery is interrupted when the undershooting of the minimum permissible bending radius is detected.
    The falling below the minimum permissible bending radius is preferably indicated to a user on a jacket surface of the charging cable, in particular by changing the color of at least part of the jacket surface.
    The invention also relates to a liquid-cooled charging cable for a charging station designed to charge a traction battery of an electrically operated motor vehicle, the charging cable being designed to carry out the method according to the invention for monitoring.
    In a preferred embodiment, the liquid-cooled charging cable further comprises a cooling system with a cooling circuit in which a cooling liquid circulates and in which a cooling liquid pressure prevails.
    Preferably, the liquid-cooled charging cable further comprises at least one strain gauge, at least one fiber optic sensor, at least one piezo element and / or at least one piezoceramic coating for measuring a bending radius of the liquid-cooled charging cable.
    In a preferred embodiment, the liquid-cooled charging cable further comprises a jacket surface which is at least partially formed by an element that changes color depending on a pressure and / or tensile load, the element preferably being formed by a sticker, a shrink tube and / or a jacket material is.
    Finally, the invention relates to a charging station for a traction battery of an electrically operated motor vehicle, comprising a liquid-cooled charging cable according to the invention.
    Details and further advantages of the method according to the invention, the liquid-cooled charging cable according to the invention and the charging station according to the invention are explained using an exemplary embodiment described below.
    The application relates to a liquid-cooled charging cable, a charging station comprising such a liquid-cooled charging cable and a method for monitoring such a liquid-cooled charging cable.
    According to the method according to the application, falling below a minimum permissible bending radius of the charging cable is detected and the falling below the minimum permissible bending radius is displayed to a user or charging point operator or service employee.
    A bending radius of the charging cable can be measured continuously and / or cyclically and the measured bending radius can be compared with the minimum permissible bending radius of the charging cable, with the failure of the minimum permissible bending radius to be displayed to a user if the measured bending radius is smaller than that is the minimum allowable bending radius.
    The detection of falling below the minimum permissible bending radius can be done by evaluating a coolant pressure change in a cooling system of the liquid-cooled charging cable. The liquid-cooled charging cable can include a cooling system with a cooling circuit in which a cooling liquid circulates and in which a cooling liquid pressure prevails.
    The cooling system can in particular be a closed cooling system. A change in coolant pressure can be detected by a pressure sensor, which can, for example, be part of the liquid-cooled charging cable or the charging station and can be arranged in the coolant circuit.
    Falling below the minimum allowable bending radius can be done by evaluating at least one strain gauge, at least one fiber optic sensor, at least one piezo element and / or at least one piezoceramic coating of the liquid-cooled charging cable. The liquid-cooled charging cable can include at least one strain gauge, at least one fiber optic sensor, at least one piezo element and / or at least one piezoceramic coating for measuring a bending radius of the liquid-cooled charging cable.
    The strain gauge, the fiber optic sensor, the piezo element and / or the piezoceramic coating can / can be arranged on the charging cable. A large number of strain gauges, fiber optic sensors, piezo elements and / or piezo ceramic coatings can for example be arranged at regular intervals along the charging cable.
    If the minimum permissible bending radius is not reached, it can be detected by measuring an existing bending radius of the liquid-cooled charging cable and comparing it with a minimum permissible bending radius. If the measured existing bending radius of the liquid-cooled charging cable is smaller than the minimum permissible bending radius, then falling below the minimum permissible bending radius is detected.
    The existing bending radius can be measured by means of the strain gauge, the fiber-optic sensor, the piezo element and / or the piezoceramic coating.
    Furthermore, a period of time can be measured during which the minimum permissible bending radius of the charging cable is not reached. Accordingly, a permanent undershoot of the bending radius can be recognized if the time span exceeds a predetermined time span.
    Such a permanent undershooting of the bending radius can be stored, for example, in a fault memory of the charging station and / or displayed to an operator of the charging station by remote data transmission. If the bending radius is permanently undershot, a charging process of the traction battery can be interrupted and / or the charging station can be permanently out of operation until the function of the charging cable has been checked by a fitter and / or put out of operation until the charging cable is replaced. After replacing the charging cable, the charging station can be put back into operation. The permanent undershooting of the minimum permissible bending radius can be saved persistently in the fault memory of the charging station until the charging cable has been replaced.
    Various warning thresholds can be displayed to the user, for example a first warning threshold if the minimum allowable bending radius is briefly undershot, and a second warning threshold if the minimum allowable bending radius is continuously undershot during the period.
    A charging process of the traction battery can be interrupted if the falling below the minimum permissible bending radius is detected.
    The fact that the minimum permissible bending radius is not reached can be indicated to a user on a jacket surface of the charging cable, in particular by changing the color of at least part of the jacket surface. The liquid-cooled charging cable can comprise a jacket surface which is at least partially formed by an element that changes color depending on a pressure and / or tensile load, the color-changing element preferably being formed by a sticker, a shrink tube and / or a jacket material. The use of a sticker or a shrink tube can be particularly advantageous if an existing charging cable is to be retrofitted with it.
    The jacket material can comprise an additive which leads to a change in color on the surface of the jacket material if it is detected that the minimum permissible bending radius is not reached. In this case, the jacket material can be selected in such a way that it changes its color if, due to the fact that the minimum permissible bending radius is not reached, a certain compressive and / or tensile load is exceeded.
    In a preferred embodiment, if the minimum permissible bending radius is not reached, the user or charging point operator or service employee can be indicated by changing the color of the color-changed element to red.
    The liquid-cooled charging cable according to the application is intended for a charging station designed for charging a traction battery of an electrically operated motor vehicle. The charging cable is designed to carry out the monitoring method according to the application.
    The charging station according to the application for a traction battery of an electrically operated motor vehicle comprises a liquid-cooled charging cable according to the application.
    The charging station can comprise an interrupt device for interrupting a charging process of the traction battery of the motor vehicle. The interruption device can cause the charging process to be interrupted if the charging cable is detected as falling below the minimum permissible bending radius and / or permanently falling below the permissible minimum bending radius.
    The charging station can comprise a display device for displaying to a user that the minimum permissible bending radius has been undershot and / or for displaying to a user that the minimum permissible bending radius has been permanently undershot. The display device can comprise, for example, a display, in particular a liquid crystal display and / or one or more light-emitting diodes. As an alternative or in addition, the display device can also comprise a loudspeaker which acoustically indicates to a user that the minimum permissible bending radius is not reached and / or that the minimum permissible bending radius is permanently below the limit, for example by outputting an acoustic voice message or an acoustic signal.
    The at least one strain gauge, the at least one fiber optic sensor, the at least one piezo element and / or the pressure sensor can be designed for data communication with a computing unit, in particular a computing unit of the charging station. The existing measured bending radius can thus be transferred to the computing unit. The computing unit can compare the measured existing bending radius with the minimum permissible bending radius.
    The computing unit can also be designed for data communication with the display device so that the display device can receive control commands from the computing unit to indicate that the minimum permissible bending radius has not been reached and / or that the minimum permissible bending radius has been permanently exceeded.
    The method for monitoring the liquid-cooled charging cable can take place during a charging process of the traction battery or in a standby mode of the charging station.
    权利要求:
    Claims (12)
    [1]
    1. A method for monitoring a liquid-cooled charging cable of a charging station for a traction battery of an electrically operated motor vehicle, with a fall below a minimum permissible bending radius of the charging cable being detected and the falling below the minimum permissible bending radius being displayed to a user or charging point operator or service employee and / or a Measure taken to protect the user.
    [2]
    2. The method according to claim 1, characterized in that a bending radius of the charging cable is measured continuously and / or cyclically and the measured bending radius is compared with the minimum permissible bending radius of the charging cable, with a user or charging point operator or service provider falling below the minimum permissible bending radius. Employee is displayed when the measured bending radius is smaller than the minimum permissible bending radius.
    [3]
    3. The method according to any one of claims 1 or 2, characterized in that the undershooting of the minimum permissible bending radius is detected by evaluating a coolant pressure change in a cooling system of the liquid-cooled charging cable.
    [4]
    4. The method according to any one of claims 1 or 2, characterized in that falling below the minimum permissible bending radius is carried out by evaluating at least one strain gauge, at least one fiber-optic sensor, at least one piezo element and / or at least one piezoceramic coating of the liquid-cooled charging cable.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that a period of time is measured during which the minimum permissible bending radius of the charging cable is undershot.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that a charging process of the traction battery is interrupted when falling below the minimum permissible bending radius is detected
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that falling below the minimum permissible bending radius is indicated to a user on a jacket surface of the charging cable, in particular by a change in color of at least part of the jacket surface.
    [8]
    8. Liquid-cooled charging cable for a charging station designed to charge a traction battery of an electrically operated motor vehicle, the charging cable being designed to carry out the monitoring method according to one of claims 1 to 7.
    [9]
    9. Liquid-cooled charging cable according to claim 8, characterized by a cooling system with a cooling circuit in which a cooling liquid circulates and in which a cooling liquid pressure prevails, the charging cable being designed to carry out the monitoring method according to one of claims 3 to 7.
    [10]
    10. Liquid-cooled charging cable according to one of claims 8 or 9, characterized by at least one strain gauge, at least one fiber optic sensor, at least one piezo element and / or at least one piezoceramic coating for measuring a bending radius of the liquid-cooled charging cable, the charging cable for carrying out the monitoring method is designed according to one of claims 4 to 7.
    [11]
    11. Liquid-cooled charging cable according to one of claims 8 to 10, characterized by a jacket surface which is at least partially formed by an element that changes color depending on a pressure and / or tensile load, preferably the element by a sticker, a shrink tube and / or a Sheath material is formed.
    [12]
    12. Charging station for a traction battery of an electrically operated motor vehicle comprising a liquid-cooled charging cable according to one of claims 8 to 11.
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    同族专利:
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    引用文献:
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    US5591937A|1994-12-02|1997-01-07|Hughes Aircraft Company|High power, high frequency transmission cable breach detection|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
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