WO2015032361A1 - 具有限流电池组的手持式燃料分配器控制设备 - Google Patents

具有限流电池组的手持式燃料分配器控制设备 Download PDF

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Publication number
WO2015032361A1
WO2015032361A1 PCT/CN2014/086145 CN2014086145W WO2015032361A1 WO 2015032361 A1 WO2015032361 A1 WO 2015032361A1 CN 2014086145 W CN2014086145 W CN 2014086145W WO 2015032361 A1 WO2015032361 A1 WO 2015032361A1
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Prior art keywords
battery pack
circuit
protection circuit
handheld device
current
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PCT/CN2014/086145
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English (en)
French (fr)
Inventor
M⋅博内利
赵锦秋
Original Assignee
北京长吉加油设备有限公司
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Priority claimed from CN201320558073.3U external-priority patent/CN203461807U/zh
Priority claimed from CN201410056435.8A external-priority patent/CN104843625A/zh
Application filed by 北京长吉加油设备有限公司 filed Critical 北京长吉加油设备有限公司
Priority to EP14841783.5A priority Critical patent/EP3045424A4/en
Priority to US14/917,769 priority patent/US20160214851A1/en
Priority to EA201690552A priority patent/EA201690552A1/ru
Priority to AU2014317535A priority patent/AU2014317535A1/en
Priority to CA2926959A priority patent/CA2926959A1/en
Priority to SG11201602784PA priority patent/SG11201602784PA/en
Priority to MX2016003097A priority patent/MX2016003097A/es
Publication of WO2015032361A1 publication Critical patent/WO2015032361A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/025—Current limitation using field effect transistors

Definitions

  • the present invention generally relates to fuel dispenser technology. More specifically, it relates to a handheld device used by a waiter to operate a fuel dispenser in a fuel supply environment.
  • customers complete their transactions by using traditional island-type fuel dispensers with integrated user interfaces.
  • the customer uses this interface to select the fuel type and enter payment information.
  • the user interface is typically equipped with a card reader and a PIN panel for receiving the payment information. Once the payment is authorized, the customer uses a fuel dispenser to fuel their vehicle.
  • the fuel supply station attendant uses the handheld device to receive payment information from the customer and authorize the operation of the selected fuel dispenser.
  • This handheld device typically includes a display, keyboard, and magnetic card reader that interact with the attendant.
  • the handheld device is similar to the user interface of a conventional island fuel dispenser, except that the handheld device is carried by a waiter.
  • the customer pulls their vehicle to the fuel dispenser and tells the waiter what amount and type of fuel is needed.
  • the waiter will use the handheld device to receive payment information, select a fuel type, and authorize the pump to dispense fuel.
  • the waiter will then typically process the payment and print the receipt directly from the handheld device after the fuel has been dispensed.
  • ATEX Advanced Explosive
  • One aspect of the present invention provides a novel handheld device for use in a manned fuel supply environment.
  • the device circuit is powered by a battery pack that includes a power supply with integrated current limiting protection circuitry.
  • the protection circuit ensures that the energy produced by the spark or heat form is maintained at a level below the pre-selected minimum ignition energy. This preferably reduces or eliminates the risk of fire in certain environments and ensures that the equipment complies with ATEX standards.
  • FIG. 1 illustrates an exemplary manned fueling environment employing a waiter handheld device constructed in accordance with an embodiment of the present invention
  • FIG. 1 shows the handheld device of Figure 1 with its battery pack removed
  • FIG. 3 is a simplified functional diagram of certain electrical components of the handheld device of FIG. 1;
  • FIG. 4 is another simplified functional block diagram showing certain operational aspects of the protection circuit of FIG. 3;
  • FIG. 5 is a detailed circuit diagram of one embodiment of the protection circuit of Figure 3, wherein the protection circuit remains toggled;
  • Figure 6 shows an alternative embodiment of the circuit of Figure 5, wherein the protection circuit is reset by a button
  • Figure 7 shows an alternative embodiment of the circuit of Figure 5, wherein the protection circuit is reset after a certain recovery time depending on the electrical characteristics of the circuit elements;
  • Figure 8 illustrates a further alternative embodiment in which the protection circuit is reset after a certain time determined by the recovery time of the circuit component
  • Figure 9 shows an alternative embodiment in which the entire protection circuit as in Figure 5 is doubled in redundancy and can be reset by a button;
  • Figure 10 illustrates an alternate embodiment of the circuit of Figure 6 in which the LED is used as a visual indicator of the state of the battery;
  • Figure 11 illustrates an alternate embodiment of the circuit of Figure 10 in which a battery pack with a protection circuit is used in conjunction with a standard industrial control circuit.
  • FIG. 1 illustrates a manned fuel supply environment including one or more fuel dispensers 10 that are operationally controlled by handheld device 12.
  • the fuel dispenser 10 is in fluid communication with a fuel storage tank (typically located underground) in which various grades or types of fuel are stored. Once the fuel supply transaction is authorized, the required fuel grade or type can be delivered by the waiter to the customer's vehicle.
  • the transaction authorization is accomplished through the use of handheld device 12, which typically communicates wirelessly with fuel dispenser 10, such as via WiFi, Bluetooth, ZigBee, or other suitable wireless protocol.
  • the fuel station attendant uses the handheld device 12 to complete the fuel supply transaction by entering the fuel type desired by the customer, authorizing the fuel dispenser 10 to dispense fuel, processing the customer payment, and printing the receipt.
  • the handheld device 12 has a housing 14 on which the display 16, user interface or keyboard 18 and card reader 20 are located.
  • the card reader 20 can be adapted to read a conventional magnetic strip credit or debit card, as well as a card with an embedded microchip.
  • the housing 14 may also preferably include a receipt printer.
  • the housing 14 is also configured with a suitable cavity to receive a removable battery pack 22 that powers the device circuitry 24 located within the housing 14 (see Figure 3).
  • battery pack 22 should have suitable terminals that engage the terminals of housing 14 to complete the electrical connection. Because the handheld device 12 preferably conforms to the ATEX guidelines for safe operation in an explosive environment, it is desirable to have an intrinsically safe battery pack 22 to power the handheld device 12.
  • FIG. 1 A general circuit diagram in accordance with a preferred embodiment of the handheld device 12 is shown in FIG.
  • the device circuitry 24 of the handheld device 12 is powered by a battery pack 22 that includes a power source 26 and a protection circuit 28.
  • the power source 26 includes a lithium ion battery, but the power source is not necessarily limited by this.
  • the power source 26 can include other types of rechargeable and non-rechargeable batteries, or other compatible energy storage devices.
  • the protection circuit 28 can be scaled for use with rechargeable and non-rechargeable batteries of various types and combinations, such as series, parallel, and series/parallel combinations.
  • the maximum allowable current can also be adjusted to the specific environment, for example, based on the minimum ignition point of the expected flammable vapor.
  • the current limiting circuit has a standard protection circuit for limiting the energy absorbed from the battery, It can also be used to avoid explosion of the battery itself and/or to control the charging and discharging operations of the battery.
  • the power source 26 is electrically coupled to a protection circuit 28 that is electrically coupled to the device circuitry 24 in the handheld device 12.
  • the protection circuit 28 includes a current sensor 30 to measure the instantaneous current flowing from the power source 26. If the measured current is above a threshold level, which may indicate a fault in the handheld device or some other dangerous operating condition, the switch actuator 32 is used to control the switch 34, which disconnects and isolates the battery pack 22 from the circuit 24. . In particular, switch 34 disconnects the circuit that powers device circuit 24, thereby avoiding the ignition of any explosive gases.
  • current sensor 30 and switch actuator 32 are formed using an integrated circuit, a Texas Instruments model INA200 current sensing monitor.
  • INA200 Texas Instruments model INA200 current sensing monitor
  • resistor 38 When the handheld device 12 is in normal operation, current is drawn from the power source 26, through the shunt resistor 38, and power is supplied to the device circuit 24. It will be appreciated that the value of resistor 38 is chosen such that it does not substantially affect the operation of device circuit 24 under normal conditions.
  • the INA200 current shunt monitor detects the voltage drop across the terminals of the shunt resistor 38 and amplifies the voltage to Vout to improve signal measurement accuracy.
  • the resistance values of resistors 40 and 42 can be adjusted such that the C IN voltage corresponds to the desired current trip point. C in is compared to a fixed internal reference voltage of 0.6 volts for the INA 200.
  • the comparator outputs Cout and then provides a high or low output state depending on whether the current sensed by the shunt resistor 38 is higher than the current trip point.
  • switching element 48 When Cout is high, that is, when the current is above the current trip point, switching element 48 is turned off to stop further current flow to device circuit 24.
  • switching element 48 includes a MOSFET device that operates with pull up resistor 44.
  • pull-up resistor 44 causes the output of the comparator to be pulled up to the supply voltage of power source 26. This voltage is also the gate voltage to the MOSFET (switching element 48).
  • a MOSFET is a transistor that can be used as a switch in an electrical circuit.
  • a P-channel enhancement MOSFET is used such that the switch is turned off when the current has reached a limit.
  • the comparator output When the comparator output is low, the comparator output voltage is 0 volts and the switching element 48 remains closed (ie, turned on).
  • the comparator latching function to prevent such oscillation can be reset only by using the reset pin on the INA200 C out.
  • the latch function can be disabled by having the RESET pin open or connected to ground.
  • capacitor 50 ensures that the RESET pin does not jump, i.e., Cout remains latched until power supply 18 is fully drained or removed. This is a particularly advantageous aspect of this embodiment.
  • capacitor 50 is located between the RESET terminal of chip 52 (eg, INA 200) and ground.
  • Power source 26 charges capacitor 50 through resistor 46 such that a high signal is stored on capacitor 50. Thus, as indicated above, this will keep switching element 48 off. In order to close the switching element 48, the power source 26 will need to be discharged. If rechargeable, the power source 26 can then be recharged and a battery pack can be reused. If the power source 26 is not rechargeable, the battery pack will be considered defective and discarded as appropriate.
  • Cout can be reset by human intervention via button 54 (in any potentially dangerous situation).
  • the switch 54 is momentarily depressed to discharge the capacitor 50 such that the reset terminal is at a low level. This allows for quick and easy exchange of the battery pack 22 to the new handheld device 12 (or one of which has been repaired) without the need for battery discharge.
  • Another embodiment provides a circuit arrangement in which Cout is reset after a certain time determined by the recovery time of the circuit component. For example, as shown in FIG. 7, if the resistance of the resistor 46 is 330 k ⁇ and the capacitance of the decoupling capacitor 50 is 1 ⁇ F, the recovery time is about 100 milliseconds when a lithium ion battery is connected to the terminal of the battery.
  • Cout remains latched for a certain period of time determined by the recovery time of the circuit component.
  • the two switching elements 48 and 66 are turned off.
  • Capacitor 50 begins to discharge, and when the voltage on pin RST of control integrated circuit 52 reaches a reset value, Cout is reset and switching elements 48 and 66 are closed.
  • the circuit will start-stop with a repeat time. For example, as shown in FIG.
  • the recovery time is about 1 second when the lithium ion battery is connected to the terminal of the battery.
  • Diode 68 and capacitor 70 are added to stabilize the start-stop behavior under any load conditions.
  • Figure 9 shows another embodiment in which the entire protection circuit 28 is doubled for redundancy. Therefore, if one or more components fail in one circuit, there is another fully operational circuit to prevent overcurrent conditions. The tolerance of the components is such that one circuit is the main circuit while the other remains transparent until the main circuit fails. Additionally, blocking diode 58 can be used to reset both circuits by activating switch 56.
  • Figure 10 illustrates an additional embodiment that is similar in many respects to the embodiment of Figure 6.
  • An LED indicator 60 that provides a visual indication of the status of the battery is included in the example.
  • the LED indicator 60 can indicate whether the battery status is normal, faulty, or discharged.
  • the indicator 60 can be any other pointing device that replaces the light emitting diode, which can provide notification to the operator regarding the status of the battery.
  • the current limiting circuit can be combined with a standard industrial control circuit 64 configuration to allow controlled charging, discharging, temperature control, etc. of the power source 26 or device circuitry 24.
  • the protection circuit 28 can be located in the same housing of the power source 26, providing a compact, rugged, and secure battery pack 22 to power any device used in a hazardous area. Holes may be included in such battery pack 22 to allow button 54 to operate, and such holes may be protected by a label or seal to verify that the reset operation is under service conditions for safety reasons. Additionally, the protection circuit 28 can be coated, cast or encapsulated inside or outside of the battery pack 22 to exclude flammable materials from contacting the gas, steam or mist so that it is allowed to be used in hazardous areas and in compliance with ATEX standards.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

一种在有人值守的燃料供应环境下使用的手持设备（12），该手持设备（12）由本质安全电池组（22）供电。该电池组（22）具有集成的限流保护电路（28），该保护电路（28）确保以火花或者热的形式生成的能量保持在低于爆炸性气体的最小着火能量的水平。

Description

具有限流电池组的手持式燃料分配器控制设备 技术领域
本发明一般地涉及燃料分配器技术。更具体地，它涉及由服务员使用来在燃料供应环境操作燃料分配器的一种手持式设备。
背景技术
在无人值守的燃料供应环境(即自助加油站)中，客户通过使用传统的具有集成用户界面的岛型燃料分配器完成他们的交易。客户使用该界面来选择燃料类型使并输入付款信息。在这方面，用户界面通常配备读卡机和用于接收所述支付信息的PIN面板。一旦付款被授权，客户使用燃料分配器来为他们的车辆供燃料。
可选择地，在有人值守的燃料供应环境中，通常在美国以外的国家，燃料供应站服务员使用手持设备来从客户收到付款信息，并授权所选燃料分配器的操作。此手持式设备通常包括与服务员交互的显示器，键盘，以及磁卡阅读器。
特别地，除了手持式设备由服务员携带以外，手持式设备与传统的岛型燃料分配器的用户界面相似。在常规的交易中，顾客将他们的车辆拉到燃料分配器，并告诉服务员所需的燃料的量和类型。服务员将使用手持式设备接收付款信息、选择燃料类型并授权泵分配燃料。然后服务员通常将处理付款，并在燃料已被分配之后直接从手持设备打印收据。
作为供燃料过程的结果，汽车燃料供应站通常有潜在的危险的环境，包括可燃蒸气，汽油和尘埃。由于这种危险的环境，燃料站服务员和顾客必须小心不要将任何火源引入空气中。由燃料站设备所产生的任何火花或热须被保持在低于爆炸性气体的最小着火能量的水平。
欧盟委员会试图通过采用通常被称为ATEX(“大气可爆炸”)产品指令的指令94/9/EC，以使在这样的环境中发生爆炸的危险最小化。ATEX规定了拟用于潜在爆炸性环境的设备和保护系统的强制性的健康和安全标准。这些标准适用于欧盟及其全部成员国。
存在构建符合ATEX要求的服务员手持设备的需要。
发明内容
本发明一方面提供了用于在有人值守的燃料供应环境中使用的一种新颖的手持设备。该设备电路是由包括具有集成限流保护电路的电源的电池组供电。该保护电路确保火花或热的形式产生的能量被保持在低于预选最小着火能量的水平。这优选地减少或消除了在某些环境中的着火的风险，并确保设备符合ATEX标准。
附图说明
在参考所附附图的本说明书中阐释了本发明的完整和能够实现的公开(包括其定向到本领域普通技术人员的最佳模式)，其中：
图1示出采用根据本发明的实施例构造的服务员手持式设备的示例性有人值守燃料供应环境；
图2示出其电池组移除的图1的手持式设备；
图3是图1的手持式设备的某些电气组件的简化功能图；
图4是示出图3的保护电路的某些操作方面的另一个简化功能框图；
图5是图3的保护电路的一个实施例的详细的电路图，其中保护电路保持跳变；
图6示出了图5的电路的可选的实施例，其中保护电路由按钮复位；
图7示出图5的电路的替代性实施例，其中在取决于电路元件的电特性的一定的恢复时间之后复位保护电路；
图8示出了进一步的替代实施例，其中在由电路元件的恢复时间所确定的一定时间后复位保护电路；
图9示出替代实施例，其中在如图5中的整个保护电路为冗余增加了一倍，并且可以通过一按钮进行复位；
图10示出了图6的电路的替代实施例，其中LED被用作电池的状态的视觉指示器；
图11示出了图10的电路的替代实施例，其中带有保护电路的电池组与标准工业控制电路相结合使用。
在本说明书和附图中重复使用的附图标记，用于表示本发明的相同或相似的特征或元件。
具体实施方式
现在将详细参考本发明的优选实施例，其中的一个或多个示例示于附图中。通过解释本发明提供每个示例，而不是用来限制本发明。事实上，在本发明中可以做出修改和变型而不脱离其范围或者要旨对于本领域技术人员将是显而易见的。例如，被图示或描述为一个实施例的部分的特征可用于另一个实施例以产生更进一步的实施例。因此，本发明意图覆盖这些修改和变化。
图1示出了有人值守的燃料供应环境，包括通过手持设备12操作控制的一个或多个燃料分配器10。燃料分配器10与其中储存各种品级或类型的燃料的燃料储存罐(通常位于地下)流体连通。一旦燃料供应交易被授权，所需的燃料品级或类型可以由服务员交付到客户的车辆。该交易授权是通过使用手持式设备12来完成，它通常与燃料分配器10无线通信，例如通过WiFi、蓝牙、ZigBee或其他合适的无线协议。在优选的实施例中，燃料站服务员使用手持式设备12通过输入顾客所希望的燃料类型、授权燃料分配器10来分配燃料、处理顾客付款并且打印收据，从而完成燃料供应交易。
现在参照图2，可以描述关于手持式设备12的其他详细信息。在这点上，手持式设备12具有壳体14，显示器16、用户界面或键盘18和卡片阅读器20位于所述壳体上。卡片阅读器20可适于读取常规磁条信用卡或借记卡，以及具有嵌入式微芯片的卡。壳体14还可以优选包括收据打印机。壳体14也被配置为具有合适的空腔来容纳为位于壳体14内的设备电路24进行供电(参见图3)的可移除电池组22。本领域的技术人员将认识，电池组22应具有接合壳体14的端子的合适的端子来完成电连接。因为手持式设备12优选地符合有关在爆炸性环境安全操作的ATEX准则，所以希望有本质安全的电池组22为手持式设备12供电。
根据手持式设备12的优选实施例的一般电路图示于图3。手持式设备12的设备电路24由电池组22供电，所述电池组22包括电源26和保护电路28。在优选实施例中，电源26包括锂离子电池，但电源不必受此限制。本领域技术人员将会理解，该电源26可以包括其他类型的可充电和不可充电的电池，或其他兼容的能量存储设备。例如，保护电路28可被改变规模以便用于各种类型和组合(如串联、并联和串联/并联组合)的可充电或不可充电的电池。允许的最大电流，也可以根据特定的环境调整，例如，基于预期的可燃性蒸气的最小着火点。最后，该限流电路除了用于限制从电池吸收的能量的标准的保护电路， 也可以用于避免电池本身的爆炸和/或控制电池的充电和放电操作。
关于电池组22的操作的其他细节被示于图4。如图所示，电源26电连接到保护电路28，所述保护电路电连接到手持式设备12中的设备电路24。保护电路28包括电流传感器30，以测量从电源26流出的瞬间电流。如果所测的电流高于阈值电平，这或许表明在手持设备中的故障或一些其它危险的操作条件，开关致动器32用来控制开关34，其从电路24断开和隔离电池组22。特别地，开关34断开为设备电路24供电的电路，从而避免了任何爆炸性气体的着火。
限流保护电路28的一个优选实施例示于图5。在这个实施例中，利用一个集成电路、德州仪器型号INA200电流传感监控器来形成电流传感器30与开关致动器32。本领域技术人员将会理解，由于其它当前显示器及电路配置将可以实现类似的效果而不脱离本发明的范围和精神，INA200仅仅用于举例。
当手持式设备12在正常操作中，从电源26流出电流，流过分流电阻器38，并且为设备电路24供电。可以理解的是选择电阻器38的值应使得其基本上在正常条件不会影响设备电路24的操作。INA200电流分路监视器检测跨越分流电阻器38的端子间的电压降，并放大该电压到Vout，以提高信号测量精度。电阻器40和42的电阻值可被调节以使CIN电压对应于所需电流跳变点。Cin与INA200的0.6伏特的固定的内部参考电压相比较。比较器输出Cout，然后根据提供分流电阻器38感测的电流是否高于电流跳变点提供高或者低的输出状态。
当Cout为高，即，当电流高于电流跳变点，开关元件48断开以停止进一步的电流流向设备电路24。在这个实施例中，开关元件48包括与上拉电阻44一起操作的MOSFET设备。特别地，上拉电阻44使得比较器的输出被上拉至电源26的电源电压。这个电压也是到MOSFET(开关元件48)的栅极电压。本领域技术人员将认识到，MOSFET是可以被用作电路中的开关的一种晶体管。在优选实施例中，使用P沟道增强型MOSFET，使得当所述电流已达到限制时开关被断开。当比较器输出为低时，比较器输出电压为0伏，且开关元件48保持闭合(即导通)。
当开关元件48断开电路，防止电流流到设备电路24。因为这这将导致跨越分流电阻器38的电压降下降到0伏，比较器输出通常会回落到低水平，从而闭合开关元件48和允许电流再次流过。如果过流条件并没有得到纠正，这可能会导致电路振荡。因此，比较器有锁存功能，以防止由Cout可以仅通过使用INA200上的复位引脚进行复位的这种振荡。可选地，锁存功能可以通过使RESET引脚 开路或连接到地面而被禁用。在图5中，电容50确保RESET引脚不跳变，即Cout保持锁存，直到电源18已完全耗尽或移除。这是本实施例的特别有利的方面。
在这方面，电容器50位于芯片52(例如，INA200)的RESET端和地之间。电源26通过电阻器46充电电容器50使得高信号被存储在电容器50上。这样如上面所指出的，这将使开关元件48保持断开。为了闭合开关元件48，电源26将需要被放电。如果可再充电，电源26可随后被再充电，并且可以尝试电池组的再利用。如果电源26不是可再充电的，则电池组将被认为是有缺陷的，并适当地丢弃。
在另一个实施例中，如图6所示，Cout可以通过按钮54通过人的干预进行复位(在任何可能的危险情况下)。如可以看到的，瞬时按下开关54使电容器50放电，从而使得复位端为低电平。这允许快速和方便地将电池组22交换到新的手持式设备12(或其中一个已修复)，而无需电池放电。
另一个实施例提供了一种电路布置，其中Cout在由电路元件的恢复时间所确定的一定时间后复位。例如，如图7所示，如果电阻46的阻值为330kΩ并且去耦电容器50的电容是1μF，则当一个锂离子电池被连接到电池的端子时恢复时间约为100毫秒。
在又一实施例中，如图8所示，Cout在由电路元件的恢复时间决定的一定时间内保持锁存。当Cout锁存时，两个开关元件48和66被断开。电容器50开始放电，并且当在控制集成电路52的引脚RST上的电压达到了复位值时，Cout复位并且开关元件48和66被闭合。在连续过电流的情况下，根据电阻器46和电容器50的值，电路将以重复时间启动-停止。例如，如图8所示，如果电阻器46的电阻值是1.8MΩ并且去耦电容器50的电容是1μF，则当锂离子电池被连接到电池的端子时恢复时间约为1秒。添加二极管68和电容器70，以稳定在任何负荷条件下的启动-停止行为。
图9示出了另一个实施例，其中整个保护电路28增加了一倍以用于冗余。因此，如果在一个电路中一个或多个组件发生故障，还有另一个完全操作的电路，以防止过电流的情况。元件的容差使得一个电路是主电路的同时其它保持透明直到主电路发生故障。此外，阻塞二极管58可用于通过激活开关56来复位两个电路。
图10示出了在许多方面类似于图6的实施例的附加实施例。然而，本实施 例中包括提供了电池的状态的视觉指示的LED指示器60。例如，LED指示器60可以指示电池状态是否正常、故障或者被放电。本领域技术人员将会理解，指示器60可以是代替发光二极管的任何其他指示设备，所述设备可提供关于电池的状态的通知给操作者。
此外，如图11所示，限流电路可以与标准的工业控制电路64配置结合以允许电源26或设备电路24的受控制的充电、放电、温度控制等。
在任何特定的实施例中，保护电路28可以位于电源26的同一个机箱内，提供了紧凑、坚固、安全的电池组22以向在危险区域中使用的任何设备供电。孔可以被包括在这样的电池组22中以允许按钮54操作，并且这样的孔可以通过标签或封条被保护以核查复位操作是在服务条件下出于安全原因。此外，保护电路28可被涂覆、浇注或封装在电池组22的内部或外部以排除可燃性物质与气体、蒸汽或薄雾接触以便它被允许在危险区域中使用，并且符合ATEX标准。
尽管已经通过使用具有不同的电路配置和元件的优选实施例描述本发明，这些特征的任意组合被包括在本发明的范围之内。仅仅是通过示例进行说明，本公开并不意图限制。

Claims (5)

  1. 一种手持设备，用于与燃料分配器无线通信并控制所述燃料分配器，所述手持设备包含：
    显示器；
    用户接口；
    读卡器；和
    壳体，所述壳体被配置以容纳具有集成限流保护电路的电池组。
  2. 如权利要求1所述的手持设备，其中，所述限流保护电路确保火花或热的形式的能量被保持在低于爆炸性气体的最小着火能量。
  3. 一种用于在有人值守的燃料供应环境下的手持设备的电池组，所述电池组包含：
    电源；和
    限流保护电路，
    其中，在电池组过热或有造成短路或火花发生的设备故障的情况下所述保护电路通过限制电流减少可燃性蒸气的着火的风险。
  4. 一种电流限制装置，用于在有人值守的燃料供应环境下使用的本质安全电池组，所述电流限制装置包含：
    电源；
    保护电路，以及
    设备电路，
    其中，在达到电流跳变极限的情况下，保护电路断开设备电路。
  5. 一种在有人值守的燃料供应环境下用于控制燃料分配器的方法，包括：
    为服务员提供用于与燃料分配器无线通信并控制燃料分配器的手持设备；
    通过包含电源和集成限流保护电路的电池组为所述手持设备电路供电，以及
    提供用于当手持式设备有故障时，安全地复位保护电路和安全地给电池放电的装置。
PCT/CN2014/086145 2013-09-09 2014-09-09 具有限流电池组的手持式燃料分配器控制设备 WO2015032361A1 (zh)

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EP14841783.5A EP3045424A4 (en) 2013-09-09 2014-09-09 Handheld fuel distributor control device with current-limiting battery pack
US14/917,769 US20160214851A1 (en) 2013-09-09 2014-09-09 Hand-held fuel dispenser control device having current-limiting battery pack
EA201690552A EA201690552A1 (ru) 2013-09-09 2014-09-09 Портативное устройство управления топливораздаточной колонкой, имеющее токоограничивающий батарейный блок
AU2014317535A AU2014317535A1 (en) 2013-09-09 2014-09-09 Handheld fuel distributor control device with current-limiting battery pack
CA2926959A CA2926959A1 (en) 2013-09-09 2014-09-09 Handheld fuel distributor control device with current-limiting battery pack
SG11201602784PA SG11201602784PA (en) 2013-09-09 2014-09-09 Hand-held fuel dispenser control device having a current-limiting battery pack
MX2016003097A MX2016003097A (es) 2013-09-09 2014-09-09 Dispositivo de control distribuidor de combustible portatil con paquete de baterias limitador de corriente.

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CN201410056435.8 2014-02-19
CN201410056435.8A CN104843625A (zh) 2014-02-19 2014-02-19 具有限流电池组的手持式燃料分配器控制设备

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