Split type charging equipment

Abstract

The embodiment of the invention discloses split type charging equipment, relates to the technical field of energy, can realize ms-level abnormal signal quick response between a charging host and a charging terminal, and is high in communication reliability and simple in topology. A charging host and a plurality of charging terminals in the split type charging equipment are connected end to end through an Ethernet cable to form an Ethernet looped network. The switch tube in each charging terminal is connected between the first pin of the first Ethernet connector and the grounding end, and the first controller is used for controlling the switch tube to be switched on under the condition that the charging terminal is abnormal. The charging host comprises a second Ethernet connector and a second controller, a second pin, connected with the first pin, in the second Ethernet connector is used for receiving the reference voltage, and the second controller is used for receiving the reference voltage under the condition that the voltage of the second pin is smaller than or equal to a first voltage threshold value. And controlling the charging host and the plurality of charging terminals to execute an exception management strategy, wherein the reference voltage is greater than the first voltage threshold.

Description

Technical Field

[0001] This application relates to the field of energy technology, and in particular to a split-type charging device. Background Technology

[0002] The charging equipment in charging stations is used to charge electric vehicles. This equipment can be an integrated charging unit or a split-type charging unit. Specifically, a split-type charging unit includes a charging host and multiple charging terminals. The charging host receives AC power from the power grid and converts it into stable DC power before supplying it to the multiple charging terminals. Each charging terminal is connected to one or more charging guns, and each charging gun is used to connect to an electric vehicle to charge it.

[0003] To achieve millisecond (ms) level rapid response to abnormal signals between the charging host and the charging terminal, and to meet the requirements of GB39752 and GB44263 standards, the charging host and the charging terminal can communicate using high real-time communication protocols, such as Controller Area Network Bus Protocol (CAN) or Ethernet for Control Automation Technology (EtherCAT). Alternatively, the charging host and the charging terminal can communicate point-to-point using traditional input / output (I / O) hardware control methods.

[0004] However, if a high real-time communication protocol is used between the charging host and the charging terminal, bit errors may occur under strong interference, requiring retransmission to ensure data accuracy. Furthermore, as the number of nodes increases and communication traffic load rises, bus occupancy and latency increase, making it impossible to guarantee millisecond-level rapid response to abnormal signals between the charging host and the charging terminal. If traditional I / O hardware control is used for point-to-point communication between the charging host and the charging terminal, a large number of charging terminals require numerous communication ports and extensive cabling, leading to high topology complexity. Therefore, achieving millisecond-level rapid response to abnormal signals between the charging host and the charging terminal, while maintaining high communication reliability and a simple topology, has become a pressing issue. Summary of the Invention

[0005] This application provides a split-type charging device that solves the problems of how to achieve millisecond-level rapid response to abnormal signals between the charging host and the charging terminal, and how to achieve high communication reliability and simple topology.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] This application provides a split-type charging device, which includes a charging host and multiple charging terminals. The charging host and multiple charging terminals are connected end-to-end via Ethernet cables to form an Ethernet ring network. Each charging terminal includes a first Ethernet connector, a switching transistor, and a first controller. The switching transistor is connected between a first pin of the first Ethernet connector and a ground terminal. The first controller is used to control the switching transistor to conduct in the event of an abnormality in the charging terminal. The charging host includes a second Ethernet connector and a second controller. A second pin of the second Ethernet connector, connected to the first pin, is used to receive a reference voltage. The second controller is used to control the charging host and multiple charging terminals to execute an abnormality management strategy when the voltage at the second pin is less than or equal to a first voltage threshold, where the reference voltage is greater than the first voltage threshold.

[0008] Based on this scheme, the first controller in the charging terminal controls the switching transistor to turn on when the charging terminal malfunctions, pulling the voltage of the first pin low and transmitting I / O signals via Ethernet. The second controller can determine within a microsecond (μs) time delay that the voltage of the second pin is less than or equal to a first voltage threshold, confirming that the charging terminal has malfunctioned, and controls the charging host and multiple charging terminals to execute the malfunction management strategy. This enables a μs-level rapid response to malfunction signals between the charging host and the charging terminals, which is faster than the millisecond-level response. Secondly, the charging host and multiple charging terminals are connected end-to-end via Ethernet cables to form an Ethernet ring network. The Ethernet ring network has the characteristics of dual-path redundancy and automatic switching of transmission paths in case of single-point device failure, which can improve the fault tolerance and reliability of the split charging equipment. The high shielding performance of Ethernet cables can improve the anti-interference capability of the split charging equipment. Furthermore, when there are a large number of charging terminals, the charging host does not need a large number of communication ports or additional connecting cables, making the topology of the split charging equipment simpler and the cost lower.

[0009] In one embodiment, the charging host further includes an optocoupler isolation circuit. The second controller is configured to control the charging host and multiple charging terminals to execute an anomaly management strategy when the voltage of the second pin is less than or equal to a first voltage threshold. This includes: the second controller controlling the charging host and multiple charging terminals to execute an anomaly management strategy when the optocoupler isolation circuit detects that the voltage of the second pin is less than or equal to the first voltage threshold.

[0010] Based on this scheme, the second controller detects the voltage of the second pin through an optocoupler isolation circuit, converting the detection of the current signal into the detection of the voltage signal, rather than directly acquiring the voltage of the second pin. By utilizing the electro-optical-electro-electric conversion method of the optocoupler isolation circuit, the anti-interference capability of the second controller can be improved, and the detection accuracy of abnormal signals can be improved.

[0011] In one embodiment, the optocoupler isolation circuit includes an optocoupler and a second resistor. The anode of the optocoupler is used to receive a reference voltage, the second resistor is connected between the cathode and the second pin of the optocoupler, and the output of the optocoupler is connected to a second controller.

[0012] Based on this scheme, the second resistor is used to limit the current flowing through the optocoupler to prevent damage to the optocoupler, thereby improving the reliability of the abnormal signal response of the charging host.

[0013] In one embodiment, in each charging terminal, the first controller is further configured to control the charging terminal to execute an abnormal management strategy when the voltage of the first pin is less than or equal to a second voltage threshold, wherein the reference voltage is greater than the second voltage threshold.

[0014] Based on this solution, when any charging terminal fails, the first controller in the failed charging terminal turns on the control switch to pull down the voltage of the first pin and transmits I / O signals through the Ethernet cable. If the voltage of the first pin in the other charging terminals is less than or equal to the second voltage threshold, the first controller in the other charging terminals controls the other charging terminals to execute the abnormal management strategy, instead of waiting for the charging host to control the other charging terminals to execute the abnormal management strategy. This can improve the fault response speed of the split charging device and further improve the reliability of the abnormal signal response of the split charging device.

[0015] In one embodiment, a switching transistor is connected between the connection point of a first pair of pins in a first Ethernet connector and a ground terminal, where the first pin belongs to the first pair of pins and the second pin belongs to the second pair of pins in a second Ethernet connector. The second controller is configured to control the charging host and multiple charging terminals to execute an anomaly management strategy when the voltage at the connection point of the second pin is less than or equal to a first voltage threshold. The first controller is further configured to control the charging terminals to execute an anomaly management strategy when the voltage at the connection point of the first pin is less than or equal to a second voltage threshold.

[0016] Based on this solution, abnormal signals are transmitted between the charging host and multiple charging terminals via two lines in the Ethernet cable. The two lines serve as redundant backups for each other, which can improve the reliability of abnormal signal transmission and further enhance the reliability of abnormal signal response for split-type charging devices.

[0017] In one implementation, both the first pair of pins and the second pair of pins are signal transmission pins, or both are idle pins.

[0018] Based on this solution, the charging host and the charging terminal can transmit abnormal signals through signal transmission pins, or through idle pins. The communication method is flexible, so the split charging device can adapt to different scenario requirements.

[0019] In one embodiment, the first pair of pins are signal transmission pins. Each charging terminal also includes a first network transformer and a first physical layer chip. The first network transformer includes a first coil and a second coil. The two ends of the first coil are connected to the first physical layer chip, and the two ends of the second coil are connected to the first pair of pins. The center tap of the second coil is the connection point of the first pair of pins.

[0020] Based on this solution, in the event of abnormal signals being transmitted between the charging host and the charging terminal via signal transmission pins, the AC / DC signal is isolated by the first network transformer, separating high-frequency signals from low-frequency signals. This avoids mutual interference between different types of signals, thereby ensuring equipment safety and signal transmission quality.

[0021] In one embodiment, the second pair of pins are signal transmission pins. The charging host also includes a second network transformer and a second physical layer chip. The second network transformer includes a third coil and a fourth coil. The two ends of the third coil are connected to the second physical layer chip, and the two ends of the fourth coil are connected to the second pair of pins. The center tap of the fourth coil is the connection point of the second pair of pins.

[0022] Based on this solution, when abnormal signals are transmitted between the charging host and the charging terminal via signal transmission pins, the AC and DC signals are isolated by the second network transformer, and the high-frequency signals are separated from the low-frequency signals. This avoids mutual interference between different types of signals, thereby ensuring equipment safety and signal transmission quality.

[0023] In one embodiment, each charging terminal further includes a first bidirectional transient voltage suppression diode connected between a first pin and a ground terminal.

[0024] Based on this scheme, the first bidirectional transient voltage suppression diode provides a low-impedance grounding path for common-mode surge current, clamping the transient voltage to a lower level, thereby better protecting the back-end circuits such as the first physical layer chip and improving the reliability of abnormal signal response of the charging terminal.

[0025] In one embodiment, each charging terminal further includes a first resistor, which and a switching transistor are connected in series between a first pin of the first Ethernet connector and a ground terminal.

[0026] Based on this scheme, the first resistor is used to limit the current flowing through the switching transistor when the switching transistor is turned on, so as to avoid damage to the switching transistor and thus improve the reliability of abnormal signal response of the charging terminal.

[0027] In one embodiment, the charging host further includes a second bidirectional transient voltage suppression diode connected between the second pin and the ground terminal.

[0028] Based on this scheme, the second bidirectional transient voltage suppression diode provides a low-impedance grounding path for common-mode surge current, clamping the transient voltage to a lower level, thereby better protecting the back-end circuits such as the second physical layer chip and improving the reliability of the charging host. Attached Figure Description

[0029] Figure 1 A schematic diagram illustrating a scenario where a charging device is used to charge an electric vehicle, as provided in an embodiment of this application.

[0030] Figure 2 This application provides a schematic diagram of the communication topology between a charging host and a charging terminal.

[0031] Figure 3 This is a schematic diagram of another communication topology between a charging host and a charging terminal provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of another communication topology between a charging host and a charging terminal provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram illustrating an application scenario of a split-type charging device provided in an embodiment of this application;

[0034] Figure 6 A circuit topology diagram of a split-type charging device provided in an embodiment of this application;

[0035] Figure 7 A schematic diagram of the circuit topology of another split-type charging device provided in the embodiments of this application;

[0036] Figure 8 A circuit topology diagram of another split-type charging device provided in an embodiment of this application;

[0037] Figure 9A circuit topology diagram of another split-type charging device provided in an embodiment of this application;

[0038] Figure 10 A circuit topology diagram of another split-type charging device provided in an embodiment of this application;

[0039] Figure 11 This is a schematic diagram of the circuit topology of another split-type charging device provided in an embodiment of this application. Detailed Implementation

[0040] The following sections will discuss the fabrication and use of various embodiments in detail. However, it should be understood that many applicable inventive concepts provided in this application can be implemented in a variety of specific environments. The specific embodiments discussed are merely illustrative of specific ways of implementing and using this description and technology, and do not limit the scope of this application.

[0041] Unless otherwise defined, all technical terms used herein have the same meaning as commonly known to one of ordinary skill in the art.

[0042] Each circuit or other component may be described or referred to as "for" performing one or more tasks. In this context, "for" is used to imply a structure by indicating that the circuit / component includes a structure (e.g., a circuit system) that performs one or more tasks during operation. Therefore, even when the specified circuit / component is currently inoperable (e.g., not turned on), it can still be referred to as "for performing that task." Circuits / components used with the term "for" include hardware, such as circuits that perform operations.

[0043] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. In this application, "multiple" refers to two or more. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. In addition, in the embodiments of this application, the words "first," "second," etc., do not limit the quantity or order.

[0044] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] Before introducing the embodiments of this application, the background technology involved in this application will be introduced first.

[0046] like Figure 1The diagram illustrates a scenario where a charging device 100, according to an embodiment of this application, charges an electric vehicle 200. The charging device 100 is connected to the electric vehicle 200. The charging device 100 receives alternating current (AC) output from the power grid 300, converts it into stable direct current (DC), and then supplies it to the electric vehicle 200 to charge it. Alternatively, the electric vehicle 200 can also output electrical energy back to the power grid 300 via the charging device 100.

[0047] The aforementioned charging device 100 can be an integrated charging device or a separate charging device, such as... Figure 1 As shown, the charging device 100 is a split-type charging device. Specifically, the charging device 100 includes a charging host 110, multiple charging terminals 120, and multiple charging guns 130. The charging host 110 includes multiple power conversion devices (not shown in the figure), which are used to convert the AC power output from the power grid 300 into stable DC power before supplying it to the charging terminals 120. The multiple power conversion devices may include multiple alternating current-to-direct current (AC-DC) converters and multiple DC-DC converters.

[0048] Each charging terminal 120 is connected to one or more charging guns 130, and each charging gun 130 is used to connect to an electric vehicle 200. Each charging terminal 120 is used to transmit DC power output from multiple power conversion devices to the electric vehicle 200 through the connected charging gun 130. In a specific implementation, an electric vehicle 200 can be connected to one or more charging guns 130. The charging terminal 120 includes a housing, a human-machine interface, a charging control unit, and a metering and billing unit, and is used for information exchange, energy transfer, and metering and billing with the electric vehicle 200.

[0049] Electric vehicles 200 are vehicles that are powered by electricity. Types of electric vehicles 200 include pure electric vehicles (pure EV / battery EV), hybrid electric vehicles (HEV), range-extended electric vehicles (REEV), or plug-in hybrid electric vehicles (PHEV).

[0050] To achieve millisecond-level rapid response to abnormal signals between the charging host 110 and the charging terminal 120, and to meet the requirements of GB39752 and GB44263 standards, a high real-time communication protocol can be used between the charging host 110 and the charging terminal 120. For example, ... Figure 2 The diagram shown illustrates a communication topology between a charging host 110 and a charging terminal 120 according to an embodiment of this application. The charging host 110 and multiple charging terminals 120 are cascaded sequentially and communicate using the EtherCAT high-level communication protocol. Alternatively, as... Figure 3 The diagram shows another communication topology between a charging host 110 and a charging terminal 120 according to an embodiment of this application. The charging host 110 and multiple charging terminals 120 are connected via a bus (BUS) and communicate using the CAN high-level communication protocol. The bus includes a high-level line (CAN high, CAN_H) and a low-level line (CAN low, CAN_L). A first resistor R1 and a second resistor R2 are respectively connected between the high-level line CAN_H and the low-level line CAN_L. Alternatively, as... Figure 4 The diagram shows another communication topology between a charging host 110 and a charging terminal 120 provided in this application embodiment. The charging host 110 and the charging terminal 120 are connected in a star configuration via I / O lines, and point-to-point communication between the charging host 110 and the charging terminal 120 is achieved using a traditional I / O hardware control method.

[0051] However, refer to Figure 2 or Figure 3 If the charging host 110 and the charging terminal 120 communicate using a high real-time communication protocol (EtherCAT or CAN), a dedicated communication chip is required, which is costly. Secondly, bit errors occur under strong interference, necessitating retransmission to ensure data accuracy. Furthermore, as the number of nodes increases and the communication traffic load rises, bus occupancy and latency will increase, making it impossible to guarantee a rapid response to millisecond-level abnormal signals between the charging host 110 and the charging terminal 120. (Refer to...) Figure 4 If the charging host 110 and the charging terminal 120 communicate point-to-point using the traditional I / O hardware control method, and there are a large number of charging terminals 120, the charging host 110 will need a large number of communication ports and a large number of connection cables, which will result in high topology complexity and high cost.

[0052] Therefore, how to achieve millisecond-level rapid response to abnormal signals between the charging host 110 and the charging terminal 120, while maintaining high communication reliability and a simple topology, has become an urgent problem to be solved.

[0053] Based on this, this application provides a split-type charging device. The charging host and multiple charging terminals in this device are connected end-to-end via Ethernet cables to form an Ethernet ring network. By adding simple circuits to both the charging terminals and the charging device, I / O abnormal signals can be transmitted via Ethernet cables. Since Ethernet ring networks possess dual-path redundancy and automatic path switching in case of single-point device failure, transmitting I / O abnormal signals via Ethernet cables offers rapid signal transmission, enabling millisecond-level rapid response to abnormal signals between the charging host and the charging terminals, and ensuring high communication reliability. Furthermore, because the charging host and charging terminals communicate via an Ethernet ring network, the charging host does not require a large number of communication ports or additional connecting cables when there are a large number of charging terminals. This split-type charging device has the advantage of a simple topology.

[0054] like Figure 5 The diagram illustrates an application scenario of a split-type charging device 400 according to an embodiment of this application. The split-type charging device 400 includes a charging host 410 and multiple charging terminals 420. The charging host 410 and the multiple charging terminals 420 are connected end-to-end via Ethernet cables to form an Ethernet ring network. The charging host 410 and the multiple charging terminals 420 are also connected via a DC bus. The charging host 410 converts the AC power output from the power grid 300 into stable DC power, which is then transmitted to the charging terminals 420 via the DC bus.

[0055] In one implementation, reference Figure 5 The split-type charging device 400 also includes multiple charging guns 430, each charging terminal 420 is connected to one or more charging guns 430, each charging gun 430 is used to connect to the electric vehicle 200, and each charging terminal 420 is used to transmit the DC power output from the charging host 410 to the electric vehicle 200 through the connected charging gun 430. Figure 1 All descriptions of the charging device 100 in the text can be referenced to the split-type charging device 400, and will not be repeated here in the embodiments of this application.

[0056] like Figure 6 The diagram shown is a circuit topology diagram of a split-type charging device 400 provided in an embodiment of this application. Since the circuit topology of the multiple charging terminals 420 in the split-type charging device 400 is the same, Figure 6 The circuit topology of each charging terminal 420 is illustrated using a single charging terminal 420 as an example.

[0057] The charging terminal 420 includes a first Ethernet connector 421, a switch Q, and a first controller 422. The switch Q is connected between a first pin H1 of the first Ethernet connector 421 and a ground terminal (GND). The first Ethernet connector 421 includes eight pins 1-8. The first pin H1 can be any one of the pins 1-8 of the first Ethernet connector 421. For example, the first pin H1 can be pin 1 of the first Ethernet connector 421. This application embodiment does not limit this, but the following embodiments of this application use pin 1 of the first Ethernet connector 421 as an example for illustrative purposes. The first controller 422 is used to control the switch Q to conduct in the event of an abnormality in the charging terminal 420, thereby connecting the first pin H1 and the ground terminal GND, and thus pulling the voltage of the first pin H1 low.

[0058] The charging host 410 includes a second Ethernet connector 411 and a second controller 412. The second pin H2 of the second Ethernet connector 411, connected to the first pin H1, is used to receive the reference voltage Vref. The second Ethernet connector 411 includes eight pins 1-8, and the second pin H2 is pin 1 of pins 1-8 of the second Ethernet connector 411 that corresponds to the first pin H1. Under normal operation of the split-type charging device 400, since the first pin H1 and the second pin H2 correspond, theoretically the voltages of the two pins are equal, both being the reference voltage Vref. However, due to unavoidable line losses, the voltage of the first pin H1 will be slightly less than the reference voltage Vref received by the second pin H2. If the charging terminal 420 malfunctions, and the first controller 422 controls the switch Q to turn on, pulling down the voltage of the first pin H1, the voltage of the second pin H2 will be less than or equal to a first voltage threshold. Because I / O signals are transmitted via Ethernet, the second controller 412 can determine within a μs-level time delay that the voltage of the second pin H2 is less than or equal to a first voltage threshold, thus determining that an anomaly has occurred in the charging terminal 420. It then controls the charging host 410 and multiple charging terminals 420 to execute anomaly management strategies, thereby enabling millisecond-level rapid response to anomaly signals between the charging host 410 and the charging terminals 420. The reference voltage Vref is greater than the first voltage threshold. This embodiment does not limit the specific values ​​of the reference voltage Vref and the first voltage threshold; an exemplary reference voltage Vref could be 12V.

[0059] In one implementation, such as Figure 7The diagram shows a circuit topology of another split-type charging device 400 provided in this application embodiment. The charging host 410 also includes an optocoupler isolation circuit 413. The aforementioned second controller 412 is used to control the charging host 410 and multiple charging terminals 420 to execute an abnormal management strategy when the voltage of the second pin H2 is less than or equal to a first voltage threshold. This includes: the second controller 412 is used to control the charging host 410 and multiple charging terminals 420 to execute an abnormal management strategy when the optocoupler isolation circuit 413 detects that the voltage of the second pin H2 is less than or equal to the first voltage threshold. By detecting the voltage of the second pin H2 through the optocoupler isolation circuit 413, the detection of the current signal is converted into the detection of the voltage signal, rather than directly acquiring the voltage of the second pin H2. Utilizing the electro-optical-electro-electric conversion method of the optocoupler isolation circuit 413 can improve the anti-interference capability of the second controller 412 and improve the detection accuracy of abnormal signals.

[0060] In one embodiment, the above-mentioned abnormal management strategy includes controlling the switches in the charging host 410 and the multiple charging terminals 420 to be turned off, or controlling the charging host 410 and the multiple charging terminals 420 to be shut down. This application embodiment does not limit this.

[0061] In one implementation, in the above Figure 6 or Figure 7 Based on the circuit topology of the split-type charging device 400 shown, abnormal signals can be transmitted between the first Ethernet connector 421 and the second Ethernet connector 411 via Ethernet cables between multiple corresponding pins. For example, abnormal signals can be transmitted via the Ethernet cable between pin 4 of the first Ethernet connector 421 and pin 4 of the second Ethernet connector 411, and also via the Ethernet cable between pin 5 of the first Ethernet connector 421 and pin 5 of the second Ethernet connector 411. Thus, transmitting abnormal signals via multiple lines in the Ethernet cable, with multiple lines providing redundancy and backup, improves the reliability of abnormal signal transmission, further enhancing the reliability of the split-type charging device 400.

[0062] In one implementation, such as Figure 8 The diagram shows a circuit topology of another split-type charging device 400 provided in an embodiment of this application. The switching transistor Q is connected between the connection point of the first pair of pins of the first Ethernet connector 421 and the ground terminal GND. The first pin H1 belongs to the first pair of pins, and the second pin H2 belongs to the second pair of pins in the second Ethernet connector 411. The first pair of pins includes the first pin H1 and the third pin H3, and the second pair of pins includes the second pin H2 and the fourth pin H4.

[0063] In one implementation, reference Figure 8In the first Ethernet connector 421 and the second Ethernet connector 411, pins 1 and 2 form a pair, pins 3 and 6 form a pair, pins 4 and 5 form a pair, and pins 7 and 8 form a pair. Pins 1 and 2, and pins 3 and 6 are generally signal transmission pins, while pins 4 and 5, and pins 7 and 8 are generally idle pins. The first and second pairs of pins may both be signal transmission pins or both be idle pins; this embodiment does not limit this. This embodiment uses the example of first pin H1 being pin 1 in the first Ethernet connector 421, third pin H3 being pin 2 in the first Ethernet connector 421, second pin H2 being pin 1 in the second Ethernet connector 411, and fourth pin H4 being pin 2 in the second Ethernet connector 411, with both the first and second pairs of pins being signal transmission pins, for illustrative purposes. The charging host 410 and the charging terminal 420 can transmit abnormal signals via signal transmission pins or idle pins, providing flexible communication methods so that the split-type charging device can adapt to different scenario requirements.

[0064] Continue to refer to Figure 8 The second controller 412 is used to control the charging host 410 and multiple charging terminals 420 to execute an anomaly management strategy when the optocoupler isolation circuit 413 detects that the voltage of the second pin H2 is less than or equal to the first voltage threshold. This includes: the second controller 412 controlling the charging host 410 and multiple charging terminals 420 to execute an anomaly management strategy when the optocoupler isolation circuit 413 detects that the voltage at the connection point of the second pair of pins in the second Ethernet connector 411 is less than or equal to the first voltage threshold. The charging host 410 and multiple charging terminals 420 transmit anomaly signals via two lines in the Ethernet cable. These two lines are redundant backups of each other, which can improve the reliability of anomaly signal transmission and further improve the reliability of the anomaly signal response of the split-type charging device 400.

[0065] In one implementation, such as Figure 9The diagram shows a circuit topology of another split-type charging device 400 provided in this application embodiment. The first pair of pins are signal transmission pins. The charging terminal 420 also includes a first network transformer T1 and a first physical layer chip PHY1. The first network transformer T1 includes a first coil L1 and a second coil L2. The two ends of the first coil L1 are connected to the first physical layer chip PHY1, and the two ends of the second coil L2 are respectively connected to the first pin H1 and the third pin H3 of the first pair of pins. The center tap of the second coil L2 is the connection point of the first pair of pins. In the event of abnormal signal transmission between the charging host 410 and the charging terminal 420 through the signal transmission pins, the first network transformer T1 isolates the AC and DC signals, separates the high-frequency signals from the low-frequency signals, and avoids mutual interference between different types of signals, thereby ensuring device safety and signal transmission quality.

[0066] In one embodiment, since the Ethernet input and Ethernet output of the charging terminal 420 have the same topology, the Ethernet port composed of the first Ethernet connector 421, the first network transformer T1, and the first physical layer chip PHY1 can be either the Ethernet input or the Ethernet output of the charging terminal 420. This application embodiment does not limit this. (Refer to...) Figure 9 The charging terminal 420 may include two Ethernet ports with the same topology, which are an Ethernet input and an Ethernet output, respectively. The pins of the first Ethernet connector 421 in the two Ethernet ports are connected to each other, so that abnormal signals can be transmitted between the two first Ethernet connectors 421 of the charging terminal 420.

[0067] In one implementation, reference is made to Figure 9 The second pair of pins are signal transmission pins. The charging host 410 also includes a second network transformer T2 and a second physical layer chip PHY2. The second network transformer T2 includes a third coil L3 and a fourth coil L4. The two ends of the third coil L3 are connected to the second physical layer chip PHY2, and the two ends of the fourth coil L4 are connected to the second pin H2 and the fourth pin H4 of the second pair of pins, respectively. The center tap of the fourth coil L4 is the connection point of the second pair of pins. In the event of abnormal signals transmitted between the charging host 410 and the charging terminal 420 via the signal transmission pins, the second network transformer T2 isolates the AC and DC signals, separating high-frequency signals from low-frequency signals, thus avoiding mutual interference between different types of signals and ensuring device safety and signal transmission quality.

[0068] In one embodiment, since the Ethernet input and Ethernet output of the charging host 410 have the same topology, the Ethernet port composed of the second Ethernet connector 411, the second network transformer T2, and the second physical layer chip PHY2 can be either the Ethernet input or the Ethernet output of the charging terminal 420. This application embodiment does not limit this. Referring to the above... Figure 9 The charging terminal 420 is described in detail. The charging host 410 may also include two Ethernet ports (not shown in the figure) with the same topology. The two Ethernet ports are an Ethernet input and an Ethernet output, respectively. The pins of the second Ethernet connector 411 in the two Ethernet ports are connected to each other, so that abnormal signals can be transmitted between the two second Ethernet connectors 411 of the charging host 410.

[0069] In one embodiment, the charging host 410 and the multiple charging terminals 420 can also be connected via cables other than Ethernet cables, and this application embodiment does not limit this.

[0070] In one embodiment, the charging host 410 and the multiple charging terminals 420 may omit the Ethernet connector or other connectors and be directly connected by cables. This application does not limit this.

[0071] In one embodiment, the aforementioned switch Q includes a metal-oxide-semiconductor field-effect transistor (MOSFET), which can also be simply referred to as a MOS transistor. The MOS transistor includes a reverse-biased body diode. Alternatively, the switch Q includes an insulated-gate bipolar transistor (IGBT) and a diode connected in reverse parallel. This application does not limit the specific implementation of the switch.

[0072] In one embodiment, the charging host 410 and the charging terminal can communicate via Fast Ethernet (FE) or Gigabit Ethernet (GE), but this application embodiment does not limit this.

[0073] The split-type charging device 400 provided in this application embodiment has a first controller 422 in the charging terminal 420 that controls the switch Q to turn on when the charging terminal 420 is abnormal, pulling the voltage of the first pin H1 low and transmitting I / O signals through the Ethernet cable. The second controller 412 can determine within a μs time delay that the voltage of the second pin H2 is less than or equal to a first voltage threshold, determine that the charging terminal 420 is abnormal, and control the charging host 410 and multiple charging terminals 420 to execute the abnormal management strategy. This enables a μs-level rapid response to abnormal signals between the charging host 410 and the charging terminal 420, which is faster than the ms-level rapid response to abnormal signals. Secondly, the charging host 410 and multiple charging terminals 420 are connected end-to-end via Ethernet cables to form an Ethernet ring network. The Ethernet ring network has the characteristics of dual-path redundancy and automatic switching of transmission paths in case of single-point device failure, which can improve the fault tolerance and reliability of the split charging device 400. The high shielding performance of the Ethernet cable can improve the anti-interference capability of the split charging device 400. Furthermore, when there are a large number of charging terminals 420, the charging host 410 does not need a large number of communication ports or a large number of connecting cables. The topology of the split charging device 400 is simpler and the cost is lower.

[0074] In one implementation, reference Figure 5 and Figure 6 If any one of the multiple charging terminals 420 malfunctions and outputs an abnormal signal, the first controller 422 is further configured to control the normally operating charging terminal 420 to execute an abnormal management strategy when the voltage at the first pin H1 is less than or equal to a second voltage threshold. The reference voltage Vref is greater than the second voltage threshold; however, this embodiment does not limit the specific value of the second voltage threshold.

[0075] In one embodiment, the circuit topology of the split-type charging device 400 is as described above. Figure 8 The circuit topology of the split-type charging device 400 shown includes a first controller 422 that, when the voltage at the first pin H1 is less than or equal to a second voltage threshold, controls the normally operating charging terminal 420 to execute an abnormal management strategy. This includes the first controller 422 further controlling the normally operating charging terminal 420 to execute the abnormal management strategy when the voltage at the connection point of the first pair of pins is less than or equal to the second voltage threshold. Abnormal signals are transmitted between the charging host 410 and the multiple charging terminals 420 via two lines in an Ethernet cable. These two lines are redundant and provide backup for each other, improving the reliability of abnormal signal transmission and further enhancing the reliability of the abnormal signal response of the split-type charging device 400.

[0076] The split-type charging device 400 provided in this application embodiment, when any one of the charging terminals 420 fails, and the first controller 422 in the failed charging terminal 420 controls the switch Q to turn on, pulling down the voltage of the first pin H1 and transmitting I / O signals through the Ethernet cable, the first controller 422 in the other charging terminals 420 controls the other charging terminals 420 to execute an abnormal management strategy when the voltage of the first pin H1 is less than or equal to a second voltage threshold, instead of waiting for the charging host 410 to control the other charging terminals 420 to execute an abnormal management strategy. This can improve the fault response speed of the split-type charging device 400 and further improve the reliability of the split-type charging device 400.

[0077] In one implementation, in the above Figure 6 to Figure 9 Based on the circuit topology of the split-type charging device 400 shown, the charging host 410 and charging terminal 420 in the split-type charging device 400 may also include other devices. The following embodiments of this application illustrate this. Figure 9 The circuit topology of the split-type charging device 400 shown is used as an example for illustrative purposes. (Refer to...) Figure 9 ,like Figure 10 The diagram shows a circuit topology of another split-type charging device 400 provided in an embodiment of this application. The charging terminal 420 also includes a first bidirectional transient voltage suppressor diode (TVS1), which is connected between the first pin H1 and the ground terminal GND. Specifically, refer to... Figure 10 The first bidirectional transient voltage suppressor diode TVS1 is connected between the connection point of the first pair of pins and the ground terminal GND.

[0078] The split charging device 400 provided in this application embodiment has a first bidirectional transient voltage suppression diode TVS1 that provides a low-impedance grounding path for common-mode surge current, clamping the transient voltage to a lower level, thereby better protecting the back-end circuits such as the first physical layer chip PHY1, and improving the reliability of the charging terminal 420.

[0079] In one implementation, reference Figure 10 The charging terminal 420 also includes a first resistor R1, which is connected in series with the switching transistor Q between the first pin H1 of the first Ethernet connector 421 and the ground terminal GND. This application embodiment does not limit the series connection order of the first resistor R1 and the switching transistor Q.

[0080] The split charging device 400 provided in this application embodiment uses a first resistor R1 to limit the current flowing through the switch Q when the switch Q is turned on, so as to avoid damage to the switch Q and thereby improve the reliability of the abnormal signal response of the charging terminal 420.

[0081] In one implementation, reference Figure 10 The optocoupler isolation circuit 413 includes an optocoupler U and a second resistor R2. The anode of the optocoupler U is used to receive a reference voltage Vref. The second resistor R2 is connected between the cathode of the optocoupler U and its second pin H2. The output of the optocoupler U is connected to the second controller 412 (not shown in the figure). Specifically, refer to... Figure 10 The second resistor R2 is connected between the cathode of the optocoupler U and the connection point of the second pair of pins.

[0082] The split charging device 400 provided in this application embodiment uses a second resistor R2 to limit the current flowing through the optocoupler U, thereby preventing damage to the optocoupler U and improving the reliability of the abnormal signal response of the charging host 410.

[0083] In one implementation, reference Figure 10 The charging host 410 also includes a second bidirectional transient voltage suppressor diode TVS2, which is connected between the second pin H2 and the ground terminal GND. Specifically, refer to... Figure 10 The second bidirectional transient voltage suppressor diode TVS2 is connected between the connection point of the second pair of pins and the ground terminal GND.

[0084] The split charging device 400 provided in this application embodiment has a second bidirectional transient voltage suppression diode TVS2 that provides a low-impedance grounding path for common-mode surge current, clamping the transient voltage to a lower level, thereby better protecting the back-end circuits such as the second physical layer chip PHY2, and improving the reliability of abnormal signal response of the charging host 410.

[0085] In one implementation, in the above Figure 10 Based on the circuit topology of the split-type charging device 400 shown, abnormal signals can be transmitted between the first Ethernet connector 421 and the second Ethernet connector 411 through multiple pairs of corresponding pins, such as... Figure 11The diagram shows a circuit topology of another split-type charging device 400 provided in this application embodiment. Abnormal signals can be transmitted via an Ethernet cable between a pair of pins 1 and 2 of the first Ethernet connector 421 and a pair of pins 1 and 2 of the second Ethernet connector 411. Abnormal signals can also be transmitted via an Ethernet cable between a pair of pins 3 and 6 of the first Ethernet connector 421 and a pair of pins 3 and 6 of the second Ethernet connector 411, as well as via an Ethernet cable between a pair of pins 4 and 5 of the first Ethernet connector 421 and a pair of pins 4 and 5 of the second Ethernet connector 411, and via an Ethernet cable between a pair of pins 7 and 8 of the first Ethernet connector 421 and a pair of pins 7 and 8 of the second Ethernet connector 411. Thus, by transmitting abnormal signals through multiple pairs of wires in the Ethernet cable, with each pair providing redundancy, the reliability of abnormal signal transmission can be improved, further enhancing the reliability of the split-type charging device 400.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A split charging device, characterized by The split charging device comprises a charging host and a plurality of charging terminals, the charging host and the plurality of charging terminals are connected in series through an Ethernet line to form an Ethernet ring network; Each of the charging terminals comprises a first Ethernet connector, a switch tube and a first controller, the switch tube is connected between a first pin of the first Ethernet connector and a ground terminal, and the first controller is configured to control the switch tube to be turned on in an abnormal case of the charging terminal; The charging host comprises a second Ethernet connector and a second controller, a second pin of the second Ethernet connector connected with the first pin is configured to receive a reference voltage, and the second controller is configured to control the charging host and the plurality of charging terminals to execute an abnormal management strategy in a case that a voltage of the second pin is less than or equal to a first voltage threshold, the reference voltage being greater than the first voltage threshold.

2. The split charging apparatus according to claim 1, characterized by The charging host further comprises an optocoupler isolation circuit; The second controller is configured to control the charging host and the plurality of charging terminals to execute the abnormal management strategy in the case that the voltage of the second pin is less than or equal to the first voltage threshold, comprising: The second controller is configured to control the charging host and the plurality of charging terminals to execute the abnormal management strategy in a case that the optocoupler isolation circuit detects that the voltage of the second pin is less than or equal to the first voltage threshold.

3. The split charging device according to claim 2, wherein The optocoupler isolation circuit comprises an optocoupler and a second resistor, an anode of the optocoupler is configured to receive the reference voltage, the second resistor is connected between a cathode of the optocoupler and the second pin, and an output terminal of the optocoupler is connected with the second controller.

4. The split charging device according to any one of claims 1-3, wherein In each of the charging terminals, the first controller is further configured to control the charging terminal to execute the abnormal management strategy in a case that a voltage of the first pin is less than or equal to a second voltage threshold, the reference voltage being greater than the second voltage threshold.

5. The split charging apparatus according to claim 4, wherein The switch tube is connected between a connection point of a first pair of pins of the first Ethernet connector and the ground terminal, the first pin belonging to the first pair of pins, and the second pin belonging to a second pair of pins in the second Ethernet connector; The second controller is configured to control the charging host and the plurality of charging terminals to execute the abnormal management strategy in the case that the voltage of the second pin is less than or equal to the first voltage threshold, comprising: the second controller is configured to control the charging host and the plurality of charging terminals to execute the abnormal management strategy in a case that a voltage of a connection point of the second pair of pins is less than or equal to the first voltage threshold; The first controller is further configured to control the charging terminal to execute the abnormal management strategy in the case that the voltage of the first pin is less than or equal to the second voltage threshold, comprising: the first controller is further configured to control the charging terminal to execute the abnormal management strategy in a case that a voltage of a connection point of the first pair of pins is less than or equal to the second voltage threshold.

6. The split charging apparatus according to claim 5, wherein The first pair of pins and the second pair of pins are both signal transmission pins, or both are idle pins.

7. The split charging apparatus according to claim 6, characterized by The first pair of pins are signal transmission pins. Each of the charging terminals further comprises a first network transformer and a first physical layer chip, the first network transformer comprising a first coil and a second coil, two ends of the first coil being connected to the first physical layer chip, two ends of the second coil being connected to the first pair of pins, and a center tap of the second coil being a connection point of the first pair of pins.

8. The split charging device according to claim 6 or 7, characterized in that, The second pair of pins are signal transmission pins. The charging host further comprises a second network transformer and a second physical layer chip, the second network transformer comprising a third coil and a fourth coil, two ends of the third coil being connected to the second physical layer chip, two ends of the fourth coil being connected to the second pair of pins, and a center tap of the fourth coil being a connection point of the second pair of pins.

9. The split charging device according to any one of claims 1-8, wherein, Each of the charging terminals further comprises a first bidirectional transient voltage suppression diode connected between the first pin and the ground terminal.

10. The split charging device according to any one of claims 1-9, wherein, Each of the charging terminals further comprises a first resistor connected in series with the switch tube between the first pin and the ground terminal of the first Ethernet connector.

11. The split charging device according to any one of claims 1-10, wherein, The charging host further comprises a second bidirectional transient voltage suppression diode connected between the second pin and the ground terminal.

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