WO2022127721A1 - 一种用电与充电装置的pe线保护系统及用电与充电装置 - Google Patents
一种用电与充电装置的pe线保护系统及用电与充电装置 Download PDFInfo
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- WO2022127721A1 WO2022127721A1 PCT/CN2021/137346 CN2021137346W WO2022127721A1 WO 2022127721 A1 WO2022127721 A1 WO 2022127721A1 CN 2021137346 W CN2021137346 W CN 2021137346W WO 2022127721 A1 WO2022127721 A1 WO 2022127721A1
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- switch
- charging device
- line
- power consumption
- resistor
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- 238000001514 detection method Methods 0.000 claims description 64
- 230000005611 electricity Effects 0.000 claims description 21
- 230000004913 activation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/001—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of incorrect or interrupted earth connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
Definitions
- the present application relates to the field of PE line protection for electricity consumption and charging devices, and in particular, to a PE wire protection system for electricity consumption and charging devices and the electricity consumption and charging device.
- the purpose of this application is to provide a PE line protection system for an electricity and charging device and an electricity and charging device.
- the switch connected to the PE line can cut off the PE line in time.
- the metal part of the device may be charged, prevents electric shock hazards to the human body, ensures the safety of the entire charging process, and enables the device to be charged in a safe and no-risk condition.
- the present application provides a PE line protection system for a power consumption and charging device, including a drive circuit and a switch, wherein:
- the input end of the drive circuit is connected to the output end of the power consumption and charging device, the drive end of the drive circuit is connected to the control end of the switch, the first end of the switch is connected to the output end of the PE line, so the the second end of the switch is connected to the input end of the PE line;
- the driving circuit is configured to control the switch to cut off the PE line when receiving a signal sent by the power consumption and charging device for indicating that the PE line is abnormally connected.
- the drive circuit includes a controllable switch module and a freewheeling circuit; wherein:
- control end of the controllable switch module is connected to the output end of the power consumption and charging device, and the first end of the controllable switch module is respectively connected to the first control end of the switch and the input of the freewheeling circuit
- the second end of the controllable switch module is grounded, the output end of the freewheeling circuit is connected to the second control end of the switch, and the common end is connected to the power supply;
- the drive circuit is specifically configured to control the controllable switch module to disconnect when receiving a signal sent by the power consumption and charging device to indicate that the PE line is abnormally connected, so that the switch cuts off the PE line.
- controllable switch module includes a first resistor and a first switch tube; wherein:
- the first end of the first resistor is connected to the output end of the power consumption and charging device, the second end of the first resistor is connected to the control end of the first switch tube, and the first end of the first switch tube is connected.
- the first end is respectively connected to the first control end of the switch and the input end of the freewheeling circuit, and the second end of the first switch tube is grounded.
- controllable switch module further includes a second resistor and a second switch tube; wherein:
- the first end of the second resistor is respectively connected to the first end of the first switch tube and the control end of the second switch tube, the second end of the second resistor is connected to the power supply, the second The first end of the switch tube is respectively connected to the first control end of the switch and the input end of the freewheeling circuit, and the second end of the second switch tube is grounded.
- the first switch tube and the second switch tube are both triodes; wherein:
- the base of the triode serves as the control terminal of the first switch tube and the second switch tube
- the collector of the triode serves as the first end of the first switch tube and the second switch tube
- the The emitter of the triode serves as the second end of the first switch and the second switch.
- the freewheeling circuit is a first diode; wherein:
- the anode of the first diode serves as the input end of the freewheeling circuit, and the cathode of the first diode serves as the output end of the freewheeling circuit.
- the switch is one of a relay, a MOS tube, a thyristor, and a triode or a combination thereof.
- the PE line protection system of the power consumption and charging device further includes a detection circuit; wherein:
- the input end of the detection circuit is connected to the control end of the power consumption and charging device, and the detection end of the detection circuit is connected to the output end of the PE line;
- the detection circuit is used to start the detection of the on-off state of the switch after receiving the detection activation signal sent by the power consumption and charging device, and output the first detection value if it is detected that the switch is closed; When it is detected that the switch is turned off, a second detection value is output.
- the detection circuit includes a third resistor, a fourth resistor, a third switch tube and a second diode; wherein:
- the control terminal of the third switch tube is connected to the control terminal of the power consumption and charging device, the first terminal of the third switch tube is connected to the first terminal of the third resistor, and the third resistor is connected to the first terminal of the third resistor.
- the second terminal is connected to the first terminal of the fourth resistor and the common terminal is used as the output terminal of the detection circuit.
- the second terminal of the fourth resistor is connected to the cathode of the second diode.
- the anode of the second diode is connected to the power supply, and the second end of the third switch tube is connected to the output end of the PE line;
- the detection circuit is specifically configured to turn on the third switch tube after receiving the detection start signal sent by the power consumption and charging device, so as to start the detection of the on-off state of the switch.
- the switch is closed, the first detection value is output; if it is detected that the switch is open, the second detection value is output.
- the third switch tube is a triode; wherein:
- the base of the triode serves as the control end of the third switch
- the collector of the triode serves as the first end of the third switch
- the emitter of the triode serves as the first end of the third switch. two ends.
- the present application also provides a power consumption and charging device, including a PE line protection system of any of the above power consumption and charging devices.
- the application provides a PE line protection system for a power consumption and charging device, including a drive circuit and a switch.
- the driving circuit is used to control the switch to cut off the PE line when receiving a signal sent by the power-consuming and charging device for indicating that the PE line is abnormally connected. It can be seen that when the PE line is abnormally connected and the wrong current flows into the PE line, such as the live wire or the live conductor is connected to the PE line, and the DC error current or the AC error current flows into the PE line, the switch connected to the PE line can cut off the PE line in time. On the one hand, it avoids that the metal part of the device may be charged, prevents electric shock hazards to the human body, ensures the safety of the entire charging process, and enables the device to be charged in a safe and no-risk condition.
- An electricity consumption and charging device provided by the present application has the same beneficial effects as the above-mentioned PE line protection system.
- FIG. 1 is a schematic structural diagram of a PE line protection system of a power consumption and charging device provided by an embodiment of the present application;
- FIG. 2 is a schematic diagram of a specific structure of a PE line protection system of a power consumption and charging device according to an embodiment of the present application.
- the core of the present application is to provide a PE line protection system and a power consumption and charging device for a power consumption and charging device.
- the switch connected to the PE wire can cut off the PE wire in time.
- the metal part of the device may be charged, prevents electric shock hazards to the human body, ensures the safety of the entire charging process, and enables the device to be charged in a safe and no-risk condition.
- FIG. 1 is a schematic structural diagram of a PE line protection system of a power consumption and charging device according to an embodiment of the present application.
- the PE line protection system of the power consumption and charging device includes a drive circuit 1 and a switch 2, wherein:
- the input end of the drive circuit 1 is connected to the output end of the power and charging device, the drive end of the drive circuit 1 is connected to the control end of the switch 2, the first end of the switch 2 is connected to the output end of the PE line, and the second end of the switch 2 is connected.
- the terminal is connected to the input terminal of the PE line;
- the driving circuit 1 is configured to control the switch 2 to cut off the PE line when receiving a signal sent by the power consumption and the charging device for indicating that the PE line is abnormally connected.
- the PE line protection system of the power consumption and charging device of the present application includes a drive circuit 1 and a switch 2, and its working principle is:
- the power consumption and charging device can detect the abnormal connection of the PE line, such as the live wire or the live conductor is connected to the PE line, the DC error current or the AC error current flows into the PE line, and generates a signal to indicate the PE line when the PE line is abnormally connected.
- the abnormally connected signal is sent to the drive circuit 1.
- the control switch 2 cuts off the PE line. , to ensure the safety of the entire charging process, so that the device can be charged in a safe and risk-free situation.
- FIG. 2 is a schematic diagram of a specific structure of a PE line protection system of a power consumption and charging device provided by an embodiment of the present application.
- the drive circuit 1 includes a controllable switch module and a freewheeling circuit; wherein:
- the control end of the controllable switch module is connected to the output end of the power consumption and charging device, the first end of the controllable switch module is respectively connected to the first control end of the switch 2 and the input end of the freewheeling circuit, and the first end of the controllable switch module is connected to the first control end of the switch 2 and the input end of the freewheeling circuit respectively. Both ends are grounded, the output end of the freewheeling circuit is connected to the second control end of the switch 2 and the common end is connected to the power supply;
- the driving circuit 1 is specifically configured to control the controllable switch module to disconnect when receiving a signal sent by the power-consuming and charging device for indicating abnormal connection of the PE line, so that the switch 2 cuts off the PE line.
- the drive circuit 1 of the present application includes a controllable switch module and a freewheeling circuit, and its working principle is:
- the drive circuit 1 controls the controllable switch module to turn off when receiving the signal sent by the power-consuming and charging device to indicate the abnormal connection of the PE line, and when the switch 2 loses power, the switch 2 is turned off to cut off the PE line.
- the switch 2 has the function of storing electric energy, and the electric energy stored by itself will not disappear immediately after the power failure.
- the function of the freewheeling circuit is to release the electric energy stored in the switch 2 after the power failure of the switch 2 to avoid damage to the controllable switch module.
- switch 2 is a relay, and the relay includes a coil and a pull-in switch K1, wherein: the first end of the coil is connected to the input end of the freewheeling circuit, the second end of the coil is connected to the output end of the freewheeling circuit, and the pull-in switch K1 The first end of the switch K1 is connected to the output end of the PE line, and the second end of the pull-in switch K1 is connected to the input end of the PE line. When the coil of the relay loses power, the pull-in switch K1 of the relay is disconnected to cut off the PE line.
- the switch 2 can also be a MOS transistor, a thyristor or a triode, which is not particularly limited in this application.
- controllable switch module includes a first resistor R1 and a first switch tube Q1; wherein:
- the first end of the first resistor R1 is connected to the output end of the power consumption and charging device, the second end of the first resistor R1 is connected to the control end of the first switch tube Q1, and the first end of the first switch tube Q1 is respectively connected to the switch.
- the first control end of 2 is connected to the input end of the freewheeling circuit, and the second end of the first switch tube Q1 is grounded.
- controllable switch module of the present application includes a first resistor R1 and a first switch transistor Q1 (taking the first switch transistor Q1 as a PNP transistor as an example), and its working principle is:
- the signal sent by the power supply and the charging device to indicate the abnormal connection of the PE line is high level, so when the power supply and the charging device output the signal (Drelay) used to indicate the abnormal connection of the PE line, the first switch tube Q1 is disconnected , the coil of the relay loses power, so that the pull-in switch K1 of the relay is disconnected to cut off the PE line.
- the power-consuming and charging device does not output a signal indicating abnormal connection of the PE line
- the first switch tube Q1 is turned on, and the coil of the relay is energized, so that the pull-in switch K1 of the relay is closed to conduct the PE line.
- controllable switch module further includes a second resistor R2 and a second switch tube Q2; wherein:
- the first end of the second resistor R2 is respectively connected to the first end of the first switch tube Q1 and the control end of the second switch tube Q2, the second end of the second resistor R2 is connected to the power supply, and the first end of the second switch tube Q2 is connected to the power supply.
- the terminals are respectively connected to the first control terminal of the switch 2 and the input terminal of the freewheeling circuit, and the second terminal of the second switch tube Q2 is grounded.
- controllable switch module of the present application further includes a second resistor R2 and a second switch transistor Q2 (in this embodiment, the first switch transistor Q1 and the second switch transistor Q2 are both NPN transistors as an example), and its working principle for:
- the signal sent by the power supply and the charging device to indicate the abnormal connection of the PE line is high level, so when the power supply and the charging device output the signal (Drelay) used to indicate the abnormal connection of the PE line, the first switch tube Q1 is turned on. , the second switch tube Q2 is disconnected, and the coil of the relay is de-energized, so that the pull-in switch K1 of the relay is disconnected to cut off the PE line.
- the first switch tube Q1 is turned off, the second switch tube Q2 is turned on, and the coil of the relay is energized, so that the pull-in switch K1 of the relay is turned on. closed to conduct the PE line.
- the first switch tube Q1 and the second switch tube Q2 are both triodes; wherein:
- the base of the triode serves as the control terminal of the first switch Q1 and the second switch Q2
- the collector of the triode serves as the first end of the first switch Q1 and the second switch Q2
- the emitter of the triode serves as the first switch Q1 and the second end of the second switch tube Q2.
- the first switch transistor Q1 and the second switch transistor Q2 in the present application can be selected but are not limited to triodes, which are not specifically limited in the present application.
- the freewheeling circuit is the first diode D1; wherein:
- the anode of the first diode D1 serves as the input end of the freewheeling circuit, and the cathode of the first diode D1 serves as the output end of the freewheeling circuit.
- the first diode D1 can be selected for the freewheeling circuit of the present application. After the coil of the relay loses power, the electric energy stored in the coil can be released through the first diode D1.
- the switch 2 is one of a relay, a MOS tube, a thyristor, and a triode, or a combination thereof.
- the PE line protection system of the power consumption and charging device further includes a detection circuit; wherein:
- the input end of the detection circuit is connected with the control end of the power consumption and charging device, and the detection end of the detection circuit is connected with the output end of the PE line;
- the detection circuit is used to start the detection of the on-off state of the switch 2 after receiving the detection start signal sent by the power consumption and charging device. If it is detected that the switch 2 is closed, the first detection value is output; Then the second detection value is output.
- the PE line protection system of the electricity consumption and charging device of the present application also includes a detection circuit, and its working principle is:
- the detection circuit is used to detect the on-off state of the switch 2. Specifically, the detection of the on-off state of the switch 2 is turned on after receiving the detection start signal sent by the power consumption and charging device. If it is detected that the switch 2 is closed, the first detection circuit is output. If it is detected that the switch 2 is disconnected, the second detection value is output, so that the on-off state of the switch 2 is determined by the detection value output by the detection circuit.
- the detection circuit includes a third resistor R3, a fourth resistor R4, a third switch tube Q3 and a second diode D2; wherein:
- the control end of the third switch tube Q3 is connected to the control end of the power-consuming and charging device, the first end of the third switch tube Q3 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the fourth end of the third resistor R3.
- the first end of the resistor R4 is connected and the common end is used as the output end of the detection circuit, the second end of the fourth resistor R4 is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to the power supply, the third The second end of the switch tube Q3 is connected to the output end of the PE line;
- the detection circuit is specifically used to turn on the third switch tube Q3 after receiving the detection start signal sent by the power consumption and charging device, so as to start the detection of the on-off state of the switch 2. If it is detected that the switch 2 is closed, the first detection circuit is output. value; if it is detected that switch 2 is disconnected, the second detection value is output.
- the detection circuit of the present application includes a third resistor R3, a fourth resistor R4, a third switch transistor Q3 and a second diode D2 (taking the third switch transistor Q3 as an NPN transistor as an example), and its working principle is as follows :
- the detection start signal sent by the electricity consumption and charging device is high level, so when the electricity consumption and charging device output the detection start signal (Srelay), the third switch tube Q3 is turned on, and if the switch 2 is closed, the detection circuit output is detected.
- the value is approximately equal to the voltage division value of the third resistor R3 and the fourth resistor R4 to the power supply 5V; if the switch 2 is turned off, the detection value output by the detection circuit is approximately equal to the power supply 5V, so that the detection value output by the detection circuit can be determined.
- the third switch tube Q3 is a triode; wherein:
- the base of the triode serves as the control end of the third switch Q3
- the collector of the triode serves as the first end of the third switch Q3
- the emitter of the triode serves as the second end of the third switch Q3.
- the third switch transistor Q3 in the present application can be selected but not limited to a triode, which is not particularly limited in the present application.
- the present application also provides a power consumption and charging device, including a PE line protection system of any of the above-mentioned power consumption and charging devices.
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Abstract
Description
Claims (11)
- 一种用电与充电装置的PE线保护系统,其特征在于,包括驱动电路和开关,其中:所述驱动电路的输入端与用电与充电装置的输出端连接,所述驱动电路的驱动端与所述开关的控制端连接,所述开关的第一端与PE线的输出端连接,所述开关的第二端与所述PE线的输入端连接;所述驱动电路用于在接收到所述用电与充电装置发送的用于指示所述PE线异常连接的信号时,控制所述开关切断所述PE线。
- 如权利要求1所述的用电与充电装置的PE线保护系统,其特征在于,所述驱动电路包括可控开关模块和续流电路;其中:所述可控开关模块的控制端与所述用电与充电装置的输出端连接,所述可控开关模块的第一端分别与所述开关的第一控制端和所述续流电路的输入端连接,所述可控开关模块的第二端接地,所述续流电路的输出端与所述开关的第二控制端连接且公共端接入电源;所述驱动电路具体用于在接收到所述用电与充电装置发送的用于指示所述PE线异常连接的信号时,控制所述可控开关模块断开,以使所述开关切断所述PE线。
- 如权利要求2所述的用电与充电装置的PE线保护系统,其特征在于,所述可控开关模块包括第一电阻和第一开关管;其中:所述第一电阻的第一端与所述用电与充电装置的输出端连接,所述第一电阻的第二端与所述第一开关管的控制端连接,所述第一开关管的第一端分别与所述开关的第一控制端和所述续流电路的输入端连接,所述第一开关管的第二端接地。
- 如权利要求3所述的用电与充电装置的PE线保护系统,其特征在于,所述可控开关模块还包括第二电阻和第二开关管;其中:所述第二电阻的第一端分别与所述第一开关管的第一端和所述第二开关管的控制端连接,所述第二电阻的第二端接入电源,所述第二开关管的第一端分别与所述开关的第一控制端和所述续流电路的输入端连接,所述第二开关管的第二端接地。
- 如权利要求4所述的用电与充电装置的PE线保护系统,其特征在于,所述第一开关管及所述第二开关管均为三极管;其中:所述三极管的基极作为所述第一开关管及所述第二开关管的控制端,所述三极管的集电极作为所述第一开关管及所述第二开关管的第一端,所述三极管的发射极作为所述第一开关管及所述第二开关管的第二端。
- 如权利要求2所述的用电与充电装置的PE线保护系统,其特征在于,所述续流电路为第一二极管;其中:所述第一二极管的阳极作为所述续流电路的输入端,所述第一二极管的阴极作为所述续流电路的输出端。
- 如权利要求1所述的用电与充电装置的PE线保护系统,其特征在于,所述开关为继电器、mos管、可控硅、三极管中的一种或其组合。
- 如权利要求1-7任一项所述的用电与充电装置的PE线保护系统,其特征在于,所述用电与充电装置的PE线保护系统还包括检测电路;其中:所述检测电路的输入端与所述用电与充电装置的控制端连接,所述检测电路的检测端与所述PE线的输出端连接;所述检测电路用于在接收到所述用电与充电装置发送的检测启动信号后开启对所述开关的通断状态的检测,若检测到所述开关闭合,则输出第一检测值;若检测到所述开关断开,则输出第二检测值。
- 如权利要求8所述的用电与充电装置的PE线保护系统,其特征在于,所述检测电路包括第三电阻、第四电阻、第三开关管及第二二极管;其中:所述第三开关管的控制端与所述用电与充电装置的控制端连接,所述第三开关管的第一端与所述第三电阻的第一端连接,所述第三电阻的第二端与所述第四电阻的第一端连接且公共端作为所述检测电路的输出端,所述第四电阻的第二端与所述第二二极管的阴极连接,所述第二二极管的阳极接入电源,所述第三开关管的第二端与所述PE线的输出端连接;所述检测电路具体用于在接收到所述用电与充电装置发送的检测启动信号后导通所述第三开关管,以开启对所述开关的通断状态的检测,若检测到所述开关闭合,则输出第一检测值;若检测到所述开关断开,则输出第二检测值。
- 如权利要求9所述的用电与充电装置的PE线保护系统,其特征在于,所述第三开关管为三极管;其中:所述三极管的基极作为所述第三开关管的控制端,所述三极管的集电极作为所述第三开关管的第一端,所述三极管的发射极作为所述第三开关管的第二端。
- 一种用电与充电装置,其特征在于,包括如权利要求1-10任一项所述的用电与充电装置的PE线保护系统。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21905650.4A EP4266519A1 (en) | 2020-12-17 | 2021-12-13 | Pe line protection system for power utilization and charging apparatus, and power utilization and charging apparatus |
US18/265,562 US20240030704A1 (en) | 2020-12-17 | 2021-12-13 | Pe line protection system for power utilization and charging apparatus, and power utilization and charging apparatus |
JP2023600087U JP3244685U (ja) | 2020-12-17 | 2021-12-13 | 電力消費・充電装置のpe線保護システム及び電力消費・充電装置 |
ZA2023/06061A ZA202306061B (en) | 2020-12-17 | 2023-06-07 | Pe line protection system for power utilization and charging apparatus, and power utilization and charging apparatus |
Applications Claiming Priority (2)
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Citations (5)
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US20110273803A1 (en) * | 2010-05-05 | 2011-11-10 | Huadao Huang | Leakage detection protective circuit |
CN104155505A (zh) * | 2013-05-14 | 2014-11-19 | 珠海格力电器股份有限公司 | 一种地线带电检测装置、空调及电器设备 |
CN110435457A (zh) * | 2018-12-29 | 2019-11-12 | 安波福中央电气(上海)有限公司 | 带有小电流注入功能的便携式电动汽车充电器 |
CN209858702U (zh) * | 2019-01-15 | 2019-12-27 | 中国南方电网有限责任公司超高压输电公司南宁监控中心 | 一种刀闸控制回路监视系统 |
CN214044996U (zh) * | 2020-12-17 | 2021-08-24 | 长春捷翼汽车零部件有限公司 | 一种用电与充电装置的pe线保护系统及用电与充电装置 |
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- 2021-12-13 WO PCT/CN2021/137346 patent/WO2022127721A1/zh active Application Filing
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20110273803A1 (en) * | 2010-05-05 | 2011-11-10 | Huadao Huang | Leakage detection protective circuit |
CN104155505A (zh) * | 2013-05-14 | 2014-11-19 | 珠海格力电器股份有限公司 | 一种地线带电检测装置、空调及电器设备 |
CN110435457A (zh) * | 2018-12-29 | 2019-11-12 | 安波福中央电气(上海)有限公司 | 带有小电流注入功能的便携式电动汽车充电器 |
CN209858702U (zh) * | 2019-01-15 | 2019-12-27 | 中国南方电网有限责任公司超高压输电公司南宁监控中心 | 一种刀闸控制回路监视系统 |
CN214044996U (zh) * | 2020-12-17 | 2021-08-24 | 长春捷翼汽车零部件有限公司 | 一种用电与充电装置的pe线保护系统及用电与充电装置 |
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EP4266519A1 (en) | 2023-10-25 |
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ZA202306061B (en) | 2024-01-31 |
CN214044996U (zh) | 2021-08-24 |
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