Charging control circuit and method compatible with national standard and European and American standard

Abstract

The invention relates to the technical field of new energy automobiles, and discloses a national standard compatible European and American standard charging control circuit and method. The circuit comprises a European and American standard charging interface, a national standard charging interface, a first area controller, a second area controller, a central controller, a connection detection circuit and a guide circuit. The European and American standard charging interface is electrically connected with the first area controller; the national standard charging interface is electrically connected with the second area controller; the first area controller is electrically connected with the central controller; the second area controller is electrically connected with the central controller; the European and American standard charging interface comprises a connection signal output end and a guide signal output end. The connection detection circuit is electrically connected with the connection signal output end of the European and American standard charging interface; and the guide circuit is electrically connected with the guide signal output end of the European and American standard charging interface. According to the invention, national standard charging and European and American standard charging can be compatible, the charging logic conversion process is simplified, and the charging reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a charging control circuit and method that is compatible with national standards and European and American standards. Background Art

[0002] In recent years, the global new energy vehicle market has developed rapidly and continued to grow, but new energy vehicles in different countries and regions have different charging standards, charging interfaces and charging control strategies. In addition, the export volume of domestic new energy vehicles has also been developing rapidly in recent years, and the market share of foreign new energy vehicles is constantly expanding. Therefore, if new energy vehicles cannot be charged on charging piles in China and Europe and the United States at the same time, it will greatly hinder the development of the new energy vehicle market. Therefore, for domestic new energy vehicles exported or overseas models in Europe and the United States, it is an urgent problem to be solved that they can be charged on different protocol standards.

[0003] Domestic new energy vehicles are charged based on the GB / T charging standard and communicate through CAN, while Europe and the United States are charged based on the CCS joint charging standards such as ISO 15118, DIN 70121 and IEC 61851-1 and communicate through PLC power carrier signals. Current new energy vehicles are difficult to be compatible with multiple charging standards, and the process of identifying charging standards and converting charging logic is relatively complicated. Summary of the invention

[0004] The present invention provides a charging control circuit and method that are compatible with both national and European and American standards, which can be compatible with both national and European and American standard charging, simplify the charging logic conversion process, and improve charging reliability.

[0005] In order to solve the above technical problems, the present invention provides a charging control circuit compatible with the national standard and the European and American standards, including: a European and American standard charging interface, a national standard charging interface, a first area controller, a second area controller, a central controller, a connection detection circuit and a guidance circuit;

[0006] The European and American standard charging interface is electrically connected to the first regional controller;

[0007] The national standard charging interface is electrically connected to the second area controller;

[0008] The first regional controller is electrically connected to the central controller;

[0009] The second regional controller is electrically connected to the central controller;

[0010] The European and American standard charging interface includes a connection signal output terminal and a guidance signal output terminal;

[0011] The connection detection circuit is electrically connected to the European and American standard charging interface, so that the connection detection circuit confirms the charging connection by detecting the voltage change of the European and American standard charging interface; wherein the connection detection circuit is electrically connected to the connection signal output end of the European and American standard charging interface;

[0012] The steering circuit is electrically connected to the European and American standard charging interface so that the steering circuit controls the charging current output by the European and American standard charging interface; wherein the steering circuit is electrically connected to the steering signal output end of the European and American standard charging interface.

[0013] Further, the first zone controller includes: a conversion module, a control module and a signal transceiver;

[0014] The first end of the conversion module is electrically connected to the European and American standard charging interface;

[0015] The second end of the conversion module is electrically connected to the first end of the control module;

[0016] The second end of the control module is electrically connected to the first end of the signal transceiver;

[0017] The second end of the signal transceiver is electrically connected to the central controller.

[0018] Furthermore, the conversion module includes: a first transformer, a first high-pass filter circuit and a conversion chip;

[0019] The first end of the first transformer is electrically connected to the European and American standard charging interface;

[0020] The second end of the first transformer is electrically connected to the first end of the first high-pass filter circuit;

[0021] The second end of the first high-pass filter circuit is electrically connected to the first end of the conversion chip;

[0022] The second end of the conversion chip is electrically connected to the control module.

[0023] Further, the connection detection circuit includes: a detection power supply and a pull-up resistor;

[0024] The first end of the pull-up resistor is electrically connected to the detection power supply;

[0025] The second end of the pull-up resistor is electrically connected to the connection signal output end of the European and American standard charging interface.

[0026] Further, the steering circuit includes: a first switch, a first resistor, a second switch and a second resistor;

[0027] The first end of the first switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the first switch is electrically connected to the first end of the first resistor;

[0028] The second end of the first resistor is electrically connected to the ground signal output end of the European and American standard charging interface;

[0029] The first end of the second switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the second switch is electrically connected to the first end of the second resistor;

[0030] The second end of the second resistor is electrically connected to the ground signal output end of the European and American standard charging interface.

[0031] Furthermore, the steering circuit further includes: a first diode;

[0032] The anode of the first diode is electrically connected to the pilot signal output terminal;

[0033] A cathode of the first diode is electrically connected to a common connection point of the first switch and the second switch.

[0034] Further, the European and American standard charging interface includes a European standard charging interface and a first charging interface resistor;

[0035] The first end of the first charging interface resistor is electrically connected to the connection signal output end of the European standard charging interface;

[0036] The second end of the first charging interface resistor is electrically connected to the ground signal output end of the European standard charging interface.

[0037] Furthermore, the European and American standard charging interface includes an American standard charging interface and a second charging interface resistor;

[0038] The first end of the second charging interface resistor is electrically connected to the connection signal output end of the American standard charging interface;

[0039] The second end of the second charging interface resistor is electrically connected to the ground signal output end of the American standard charging interface.

[0040] Correspondingly, the present invention also provides a charging control method compatible with both national and European standards, which is applied to the charging control circuit compatible with both national and European standards. The method includes:

[0041] Step 101: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal;

[0042] Step 102: When the charging type is DC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard DC charging signal;

[0043] Step 103: When the charging type is DC charging, the control steering circuit performs a first state jump process on the first national standard DC charging signal to form a second national standard DC charging signal;

[0044] Step 104: Control the central controller to perform DC charging according to the second national standard DC charging signal.

[0045] Furthermore, the charging control method of the national standard compatible with the European and American standards also includes:

[0046] Step 201: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal;

[0047] Step 202: When the charging type is AC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard AC charging signal;

[0048] Step 203: When the charging type is AC charging, the control steering circuit performs a second state jump process on the first national standard AC charging signal to form a second national standard AC charging signal;

[0049] Step 204: Control the central controller to perform AC charging according to the second national standard AC charging signal.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] When the charging control circuit of the present invention receives the first European and American standard charging signal using the connection detection circuit, the first regional controller is used to determine the charging type corresponding to the first European and American standard charging signal, and the first European and American standard charging signal is converted into the corresponding first national standard charging signal according to the charging type. The guidance circuit is controlled according to the charging type to perform corresponding signal jumps on the first national standard charging signal, and the central controller is used to perform corresponding charging control according to the first national standard charging signal, thereby achieving compatibility with national standard charging and European and American standard charging, improving the comprehensiveness of charging, simplifying the charging logic conversion process, and improving charging reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of the structure of an embodiment of a charging control circuit provided by the present invention that is compatible with the national standard and the European and American standards;

[0053] Figure 2A schematic structural diagram of an embodiment of a first zone controller provided by the present invention;

[0054] Figure 3 A schematic diagram of the structure of an embodiment of a conversion module provided by the present invention;

[0055] Figure 4 A schematic structural diagram of an embodiment of a connection detection circuit provided by the present invention;

[0056] Figure 5 A schematic structural diagram of an embodiment of a European standard connection detection circuit provided by the present invention;

[0057] Figure 6 A schematic diagram of the structure of an embodiment of the American standard connection detection circuit provided by the present invention;

[0058] Figure 7 A schematic structural diagram of an embodiment of a steering circuit provided by the present invention;

[0059] Figure 8 A schematic diagram of the structure of another embodiment of the charging control circuit provided by the present invention that is compatible with the national standard and the European and American standards;

[0060] Fig. 9 A flow chart of an embodiment of a charging control method provided by the present invention that is compatible with national standards and European and American standards. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0063] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0064] Example 1

[0065] See also Figure 1, is a structural schematic diagram of an embodiment of a charging control circuit of the national standard compatible with the European and American standards provided by the present invention, the circuit includes a European and American standard charging interface, a national standard charging interface, a first area controller, a second area controller, a central controller, a connection detection circuit and a guidance circuit;

[0066] The European and American standard charging interface is electrically connected to the first regional controller;

[0067] The national standard charging interface is electrically connected to the second area controller;

[0068] The first regional controller is electrically connected to the central controller;

[0069] The second regional controller is electrically connected to the central controller;

[0070] The European and American standard charging interface includes a connection signal output terminal and a guide signal output terminal; the connection detection circuit is electrically connected to the European and American standard charging interface, so that the connection detection circuit confirms the charging connection by detecting the voltage change of the European and American standard charging interface; wherein the connection detection circuit is electrically connected to the connection signal output terminal of the European and American standard charging interface;

[0071] The steering circuit is electrically connected to the European and American standard charging interface so that the steering circuit controls the charging current output by the European and American standard charging interface; wherein the steering circuit is electrically connected to the steering signal output end of the European and American standard charging interface.

[0072] In the first embodiment of the present invention, in order to achieve that new energy vehicles can be charged on charging piles in China and Europe and the United States, two different regional controllers are set to respectively perform drive control related to European and American standard charging and national standard charging, and the charging logic is uniformly decided by the central controller. Among them, the first regional controller is electrically connected to the European and American standard charging interface, used to control the charging of European and American standard charging standards, and convert the European and American standard charging signals into national standard charging signals; the second regional controller is electrically connected to the national standard charging interface, used to control the charging of national standard charging standards. The central controller is used to receive the national standard charging signal processed by the regional controller, and perform corresponding national standard AC and DC charging logic control.

[0073] In the first embodiment of the present invention, the European and American standard charging interface is used to connect to the European and American standard charging pile. The connection detection circuit is a PP detection circuit, and the connection signal output end of the European and American standard charging interface is the PP signal output end. The PP detection circuit is connected to the PP signal output end of the European and American standard charging interface. The PP detection circuit can determine whether a charging plug is inserted by detecting the voltage change at the PP signal output end, thereby confirming the charging connection. The guidance circuit is a CP detection circuit, and the guidance signal output end of the European and American standard charging interface is the CP signal output end. The CP detection circuit is connected to the CP signal output end of the European and American standard charging interface. The CP detection circuit can perform charging control and control the charging current output by the CP signal output end.

[0074] Further, in the first embodiment of the present invention, the first zone controller includes: a conversion module, a control module and a signal transceiver;

[0075] The first end of the conversion module is electrically connected to the European and American standard charging interface;

[0076] The second end of the conversion module is electrically connected to the first end of the control module;

[0077] The second end of the control module is electrically connected to the first end of the signal transceiver;

[0078] The second end of the signal transceiver is electrically connected to the central controller.

[0079] In the first embodiment of the present invention, see Figure 2 , is a schematic diagram of the structure of an embodiment of the first regional controller provided by the present invention. Figure 2 The PLC module is a conversion module, the MCU module is a control module, and the CAN transceiver is a signal transceiver. The first regional controller ZCU1 that controls the charging of European and American standard charging standards includes a PLC module, an MCU module, and a CAN transceiver for converting the received European and American standard PLC signals into national standard CAN communications, and passing the converted charging signals to the central controller VDC. The second regional controller ZCU2 that controls the charging of national standard charging standards only needs to pass the relevant charging signals to the central controller VDC, without the need to perform protocol conversion on the charging signals, so that only the national standard charging logic is required in the central controller VDC. Therefore, a module for converting the charging protocol is set in the first regional controller ZCU1, and protocol conversion processing is performed on the European and American standard charging signals, so that new energy vehicles can be charged with both the European standard protocol and the national standard.

[0080] Further, in the first embodiment of the present invention, the conversion module includes: a first transformer, a first high-pass filter circuit and a conversion chip;

[0081] The first end of the first transformer is electrically connected to the European and American standard charging interface;

[0082] The second end of the first transformer is electrically connected to the first end of the first high-pass filter circuit;

[0083] The second end of the first high-pass filter circuit is electrically connected to the first end of the conversion chip;

[0084] The second end of the conversion chip is electrically connected to the control module.

[0085] In the first embodiment of the present invention, see Figure 3 , is a schematic diagram of a structure of an embodiment of the conversion module provided by the present invention. Figure 3 The PLC module is a conversion module, the PLC chip is a conversion chip, the MCU module is a control module, the CAN transceiver is a signal transceiver, the CP signal output terminal is a guide signal output terminal, and the PE signal output terminal is a ground signal output terminal.

[0086] The PLC module includes a first transformer, a first high-pass filter circuit and a PLC chip. Among them, the first transformer is a 1:1:1 transformer, and the first transformer is electrically connected to the CP signal output terminal and the PE signal output terminal of the European and American standard charging interface. The European and American standard charging signal can be obtained at the European and American standard charging interface, and the European and American standard charging signal is transmitted to the first high-pass filter circuit. The first high-pass filter circuit transmits the European and American standard charging signal to the PLC chip through RX, and receives the signal from the PLC chip through TX. The PLC chip and the MCU module communicate using SPI and I2C. After the PLC chip converts the PLC signal into a CAN signal, the CAN signal is transmitted to the MCU module. The MCU module processes the received CAN signal and transmits the processed CAN signal to the CAN transceiver using TX / RX. The CAN transceiver sends the CAN signal to the central controller VDC to perform the corresponding national standard AC / DC charging control.

[0087] Optionally, the PLC module is used to convert the PLC signal into a CAN signal. When AC / DC charging is performed on a European and American standard charging pile, the PLC signal is converted into a corresponding national standard charging signal in real time, and the signal is transmitted to the central controller VDC, and the corresponding national standard AC / DC charging logic control is performed in the central controller VDC. Specifically, the PLC signal that communicates in the European and American standards is communicated by coupling to the CP signal. After the CP signal enters the charging control circuit from the European and American standard charging interface, it is electrically isolated by the transformer, and then enters the PLC chip through the high-pass filter circuit. The PLC chip processes the PLC signal coupled to the CP signal and transmits the signal to the MCU module through the SPI interface. After the MCU module obtains the relevant information about charging in the PLC signal, it finds the corresponding national standard AC / DC charging CAN signal, and sends the CAN signal to the central controller VDC using the CAN transceiver to perform national standard AC / DC charging control.

[0088] Further, in the first embodiment of the present invention, the connection detection circuit includes: a detection power supply and a pull-up resistor;

[0089] The first end of the pull-up resistor is electrically connected to the detection power supply;

[0090] The second end of the pull-up resistor is electrically connected to the connection signal output end of the European and American standard charging interface.

[0091] In the first embodiment of the present invention, see Figure 4 , is a schematic diagram of a structure of an embodiment of a connection detection circuit provided by the present invention. Figure 4 The PP detection circuit is a connection detection circuit, and the PP signal output terminal is a connection signal output terminal. The connection detection circuit includes a detection power supply and a pull-up resistor. The connection detection circuit is used to detect whether there is a European and American standard charging signal. One end of the pull-up resistor is connected to the detection power supply, and the other end is connected to the PP signal output terminal of the European and American standard charging interface and the first regional controller ZCU1.

[0092] Further, in the first embodiment of the present invention, the European and American standard charging interface includes a European standard charging interface and a first charging interface resistor;

[0093] The first end of the first charging interface resistor is electrically connected to the connection signal output end of the European standard charging interface;

[0094] The second end of the first charging interface resistor is electrically connected to the ground signal output end of the European standard charging interface.

[0095] Further, in the first embodiment of the present invention, the European and American standard charging interface includes an American standard charging interface and a second charging interface resistor;

[0096] The first end of the second charging interface resistor is electrically connected to the connection signal output end of the American standard charging interface;

[0097] The second end of the second charging interface resistor is electrically connected to the ground signal output end of the American standard charging interface.

[0098] In the first embodiment of the present invention, see Figure 5 , is a schematic diagram of the structure of an embodiment of the European standard connection detection circuit provided by the present invention. Figure 6 , is a structural diagram of an embodiment of the American standard connection detection circuit provided by the present invention. Figure 5 and Figure 6 The PP signal output terminal is the connection signal output terminal, the PE signal output terminal is the ground signal output terminal, and the PP detection circuit is the connection detection circuit. The charging resistor of the European standard charging interface is the first charging interface resistor, and the two ends of the first charging interface resistor are respectively connected to the PP signal output terminal and the PE signal output terminal of the European standard charging interface, wherein the PE signal output terminal is grounded. The charging resistor of the American standard charging interface is the second charging interface resistor, and the two ends of the second charging interface resistor are respectively connected to the connection signal output terminal and the ground signal output terminal of the American standard charging interface, wherein the ground signal output terminal is grounded. Since the European standard charging interface and the American standard charging interface are AC / DC integrated, the same PP detection circuit can be used to detect AC charging signals and DC charging signals. However, there are large differences in the resistance and circuit of the power supply circuit of the European standard charging interface and the American standard charging interface.

[0099] Optionally, the first resistor corresponding to the European standard charging interface is 4.7k, and the second resistor corresponding to the American standard charging interface is 2.7k. Due to the difference in circuits between the European standard charging interface and the American standard charging interface, the first regional controller can determine whether the signal is a European standard charging signal or an American standard charging signal through resistance detection when receiving the European and American standard charging signal. Since the relevant standards for American standard charging specify that there will be a 5V pull-up voltage and a 330Ω resistor on the vehicle side, and the European standard does not require the vehicle-side detection voltage and pull-up resistor, in order to be compatible with European standard charging and American standard charging, the detection power supply and pull-up resistor of the PP detection circuit can refer to the American standard and be designed to 5V and 330Ω, thereby ensuring the uniformity of the hardware circuit and saving hardware resources.

[0100] Further, in the first embodiment of the present invention, the steering circuit includes: a first switch, a first resistor, a second switch and a second resistor;

[0101] The first end of the first switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the first switch is electrically connected to the first end of the first resistor;

[0102] The second end of the first resistor is electrically connected to the ground signal output end of the European and American standard charging interface;

[0103] The first end of the second switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the second switch is electrically connected to the first end of the second resistor;

[0104] The second end of the second resistor is electrically connected to the ground signal output end of the European and American standard charging interface.

[0105] In the first embodiment of the present invention, when charging according to European and American standards, both DC charging and AC charging require a pilot circuit, and when charging according to the national standard, AC charging requires a pilot circuit. The OBC controller is provided with a pilot circuit, but for new energy vehicles without an OBC controller, only national standard DC charging can be performed. Therefore, a pilot circuit is provided in the charging control circuit, which can be compatible with models with OBC controllers and models without OBC controllers, thereby being compatible with European and American standard AC and DC charging and national standard AC and DC charging.

[0106] In the first embodiment of the present invention, the steering circuit includes a first switch, a first resistor, a second switch and a second resistor. The first resistor and the second resistor are used to protect the circuit, and the first switch and the second switch control the start of the steering circuit by a joint action. When it is detected that the new energy vehicle has an OBC controller, it can be selected not to start the steering circuit in the charging control circuit in the subsequent charging process, and the first switch is controlled to remain in an open state. When it is detected that the new energy vehicle has no OBC controller, the subsequent charging process needs to use the steering circuit in the charging control circuit, and the first switch is controlled to be closed. When it is judged that the charging type is European and American standard charging, and the national standard AC charging, so the steering circuit is needed, the second switch is controlled to be closed, the steering circuit in the charging control circuit is started, and the corresponding charging control is completed. When it is judged that the charging type is national standard DC charging, it is judged that the subsequent charging process does not need to use the steering circuit, so the second switch is kept in an open state. Therefore, by setting the first switch in the steering circuit, it can be compatible with models with OBC controllers and models without OBC controllers; by setting the second switch in the steering circuit, it is compatible with European and American standard AC and DC charging and national standard AC and DC charging.

[0107] Furthermore, in the first embodiment of the present invention, the steering circuit further includes: a first diode;

[0108] The anode of the first diode is electrically connected to the pilot signal output terminal;

[0109] A cathode of the first diode is electrically connected to a common connection point of the first switch and the second switch.

[0110] In the first embodiment of the present invention, see Figure 7, is a schematic diagram of a structure of an embodiment of the steering circuit provided by the present invention. Figure 7 The CP detection circuit in is a guidance circuit, and the CP signal output end is a guidance signal output end. The CP detection circuit is arranged between the European and American standard charging interface and the first regional controller. The first resistor and the second resistor of the CP detection circuit are connected in parallel, and one end of the first resistor and the second resistor are connected to the CP signal output end of the European and American standard charging interface, and the other end is connected to the PE signal output end of the European and American standard charging interface. The first resistor and the second resistor are connected in series with the first switch and the second switch respectively. The CP detection circuit also includes a first diode, the positive electrode of the first diode is connected to the CP signal output end of the European and American standard charging interface, and the negative electrode is connected to the common connection point of the first switch and the second switch. The control circuit is unidirectionally conductive to avoid signal backflow.

[0111] At present, the EE architecture has developed from distributed to cross-domain integration, forming a form in which the strategy is moved up to the central controller VDC, and the drive control is delegated to each regional controller ZCU. The whole vehicle control can be composed of a central controller VCD and multiple regional controllers ZCU. As an example of the first embodiment of the present invention, see Figure 8, is a structural schematic diagram of another embodiment of a charging control circuit of the national standard compatible with the European and American standards provided by the present invention, the charging control circuit includes a European and American standard charging interface, a national standard AC charging interface, a national standard DC charging interface, a regional controller ZCU1, a regional controller ZCU2, a central controller VDC, a battery management system BMS, a battery pack Battery and an on-board controller OBC. The regional controller ZCU1 performs drive control related to CCS charging, the regional controller ZCU2 performs drive control related to GB / T charging, and the charging logic is uniformly decided by the central controller VDC. The regional controller ZCU1 involves a PP detection circuit compatible with European and American standards, and a new CP detection circuit is added, which is compatible with models with OBC controllers and models without OBC controllers. A PLC module for converting PLC signals into CAN signals is provided in the regional controller ZCU1. In the charging control circuit, the PP signal on the European and American standard charging interface can be detected by the PP detection circuit, and the detection result is sent to the regional controller ZCU1. The regional controller ZCU1 can determine that the charging type at this time is European and American standard charging. The CP signal on the European and American standard charging interface is detected by the CP detection circuit, and the CP signal is sent to the regional controller ZCU1. The regional controller ZCU1 can analyze the PLC signal coupled to the CP signal to obtain the charging information, and transmit the charging information to the central controller VDC. The central controller VDC performs corresponding charging control according to the charging information. In the charging control circuit, the components communicate with each other using CAN signals, and the PLC signal obtained from the European and American standard charging interface is also communicated in the charging control circuit in the form of CAN signals after completing the protocol conversion through the PLC module of the regional controller ZCU1. In the charging control circuit, when the CC signal is detected to be valid, it is determined to perform AC charging. If the CC2 signal is detected to be valid, it is determined to perform DC charging. Among them, the national standard AC charging interface transmits the CC signal to the central controller VDC, and the national standard DC charging interface can transmit the CC2 signal to the central controller VDC. The European and American standard charging interface is an integrated AC and DC interface, so after receiving the charging signal, the European and American standard charging interface transmits the charging signal to the regional controller ZCU1 for processing. The regional controller ZCU1 then sends a CC signal or CC2 signal to the central controller VDC to enable the central controller VDC to perform corresponding charging control.

[0112] In summary, the first embodiment of the present invention provides a charging control circuit that is compatible with both national and European standards. The circuit includes a European and American standard charging interface, a national standard charging interface, a first regional controller, a second regional controller, a central controller, a connection detection circuit, and a guidance circuit; the European and American standard charging interface is electrically connected to the first regional controller; the national standard charging interface is electrically connected to the second regional controller; the first regional controller is electrically connected to the central controller; the second regional controller is electrically connected to the central controller; the connection detection circuit is electrically connected to the connection signal output end of the European and American standard charging interface respectively; the guidance circuit is electrically connected to the guidance signal output end of the European and American standard charging interface respectively. The present invention is compatible with national standard charging and European and American standard charging, and improves the comprehensiveness of charging; the first regional controller is used to convert the PLC signal into a CAN signal, which simplifies the charging logic conversion process, and while reducing the device materials and costs, it is also more convenient for the placement of the controller of the whole vehicle, and improves the charging reliability.

[0113] Example 2

[0114] The present invention provides a charging control method compatible with the national standard and the European and American standards. The method is applied to a charging control circuit compatible with the national standard and the European and American standards, comprising:

[0115] Step 101: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal;

[0116] Step 102: When the charging type is DC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard DC charging signal;

[0117] Step 103: When the charging type is DC charging, the control steering circuit performs a first state jump process on the first national standard DC charging signal to form a second national standard DC charging signal;

[0118] Step 104: Control the central controller to perform DC charging according to the second national standard DC charging signal.

[0119] In the second embodiment of the present invention, it also includes:

[0120] Step 201: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal;

[0121] Step 202: When the charging type is AC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard AC charging signal;

[0122] Step 203: When the charging type is AC charging, the control steering circuit performs a second state jump process on the first national standard AC charging signal to form a second national standard AC charging signal;

[0123] Step 204: Control the central controller to perform AC charging according to the second national standard AC charging signal.

[0124] See also Fig. 9 , is a flow chart of an embodiment of a charging control method for national standards compatible with European and American standards provided by the present invention. The following describes this embodiment using four situations: European and American standard DC charging, European and American standard AC charging, national standard DC charging, and national standard AC charging.

[0125] The charging control method of European and American standard DC charging is as follows: the plug-in wakes up the regional controller ZCU1 through the European and American standard charging signal, the regional controller ZCU1 wakes up the central controller VDC, the central controller VDC confirms the connection, and when the ZCU1_CC2 signal is detected, it is determined that this charging is European and American standard DC charging. The central controller VDC performs a power-on self-check. If an OBC controller is detected, the first switch of the CP detection circuit is kept disconnected and the CP detection circuit is not started; if no OBC controller is detected, the first switch of the CP detection circuit is controlled to be closed to complete the jump of the CP signal from 12V to 9V state. The regional controller ZCU1 establishes communication with the European and American standard charging pile, performs protocol matching, establishes a session, selects a payment method, etc. to complete the European and American standard initialization. The central controller VDC checks whether the charging conditions are met, wherein the charging conditions include that the CC2 / CC signal is valid, the battery is not fully charged, and the vehicle has no faults that prohibit charging. When it is determined that the charging conditions are met, the European and American standard charging pile is controlled to shake hands with the central controller VDC to exchange charging parameters. The regional controller ZCU1 drives the charging electronic lock, locks it, and returns the electronic lock lock status to the central controller VDC within the specified time. When the central controller VDC receives that the lock status of the electronic lock is locked, the subsequent charging process continues, otherwise the charging process is exited. If there is an OBC controller, the switch of the CP detection circuit in the OBC controller is closed; if there is no OBC controller, the CP detection circuit of the charging control circuit is controlled to close the second switch. After starting the CP detection circuit, the European and American standard charging pile end starts insulation monitoring. After the insulation monitoring, pre-charging is performed, and the central controller VDC is used to judge the pre-charging completion condition. When it is judged that the pre-charging is completed, energy transmission is started, and the central controller VDC is used to detect the charging stop condition in real time. When the central controller VDC detects the charging stop condition, energy transmission is stopped. After stopping energy transmission, the switch of the CP detection circuit is disconnected, and the regional controller ZCU1 drives the electronic lock to unlock. The regional controller ZCU1 ends the session with the European and American standard charging pile end, and the regional controller ZCU1 stops the output of charging-related signals communicating with the central controller VDC, ending the European and American standard DC charging process.

[0126] The charging control method of European and American standard AC charging is as follows: the plug-in wakes up the regional controller ZCU1 through the European and American standard charging signal, the regional controller ZCU1 wakes up the central controller VDC, and the central controller VDC confirms the connection of the ZCU1_CC signal. The central controller VDC performs a self-check on power-on. If an OBC controller is detected, the first switch of the CP detection circuit is kept disconnected and the CP detection circuit is not started; if no OBC controller is detected, the first switch of the CP detection circuit is controlled to be closed. The regional controller ZCU1 uses the CP detection circuit to detect the CP signal. If the duty cycle is detected to be 10%-96%, it is determined that this charging is European and American standard AC charging. The regional controller ZCU1 performs PP signal resistance detection, simulates the PP signal into the ZCU1_CC signal of the corresponding resistance in the national standard AC charging, and sends it to the central controller VDC. The central controller VDC checks whether the charging conditions are met, where the charging conditions include that the CC2 / CC signal is valid, the battery is not fully charged, and the vehicle has no fault that prohibits charging. The regional controller ZCU1 drives the charging electronic lock, locks it, and returns the electronic lock locked state to the central controller VDC within the specified time. When the central controller VDC receives the lock status of the electronic lock as locked, the subsequent charging process continues, otherwise the charging process is exited. If there is an OBC controller, the switch of the CP detection circuit in the OBC controller is closed; if there is no OBC controller, the CP detection circuit of the charging control circuit is controlled to close the second switch. The CP detection circuit is started by closing the switch of the CP detection circuit, so that the CP signal jumps from the 9V PWM signal to the 6V PWM signal. The European and American standard charging pile end turns on the power supply circuit, starts energy transmission, and uses the central controller VDC to detect the charging stop condition in real time. When the central controller VDC detects the charging stop condition, it stops energy transmission. After stopping energy transmission, the switch of the CP detection circuit is disconnected, and the regional controller ZCU1 drives the electronic lock to unlock and feedback the position status of the electronic lock. The European and American standard charging pile end disconnects the power supply circuit within the specified time and stops power supply. The CP signal state of the European and American standard charging pile end jumps from 9V PWM to 12V PWM, disconnects the PWM switch, and ends the European and American standard AC charging process.

[0127] The charging control method of national standard DC charging is as follows: the plug wakes up the central controller VDC through the national standard DC charging signal, and the central controller VDC confirms the connection. When the VDC_CC2 signal is detected, it is determined that this charging is national standard DC charging. The central controller VDC establishes communication with the national standard charging pile, and exchanges initial data such as the communication version and the total voltage allowed by the vehicle-side insulation detection. The central controller VDC checks whether the charging conditions are met, where the charging conditions include the CC2 / CC signal is valid, the battery is not fully charged, and there is no charging prohibition fault in the vehicle. When it is judged that the charging conditions are met, the regional controller ZCU2 drives the charging electronic lock, locks it, and returns the electronic lock locked state to the central controller VDC within the specified time, otherwise the charging process is exited. The national standard charging pile starts insulation monitoring, and after the insulation monitoring, the national standard charging pile and the central controller VDC exchange charging parameters. After the exchange of charging parameters is completed, pre-charging is performed, and the central controller VDC is used to judge the pre-charging completion condition. When it is judged that the pre-charging is completed, energy transmission is started, and the central controller VDC is used to detect the charging stop condition in real time. When the central controller VDC detects the charging stop condition, it stops energy transmission. After stopping energy transmission, the regional controller ZCU2 drives the electronic lock to unlock and feedbacks the position status of the electronic lock. The central controller VDC ends the session with the national standard charging pile end, and the regional controller ZCU2 stops the output of charging-related signals communicating with the central controller VDC, ending the national standard DC charging process.

[0128] The charging control method of European and American standard AC charging is as follows: the plug gun wakes up the central controller VDC through the national standard AC charging signal, and the central controller VDC confirms the connection. If the VDC_CC signal is detected, the current charging is the national standard AC charging. The central controller VDC performs a power-on self-check. If an OBC controller is detected, the first switch of the CP detection circuit is kept disconnected and the CP detection circuit is not started; if no OBC controller is detected, the first switch of the CP detection circuit is controlled to be closed. The central controller detects the resistance value of the CC signal, confirms that the national standard charging pile end is connected to the vehicle end, and confirms the charging capacity of the charging cable. The CP detection circuit is used to detect the CP signal. Due to the resistance voltage division of the CP detection circuit, the CP signal is detected to be in the 9V state at this time. The national standard charging pile end closes the PWM switch and outputs a 12V PWM signal. The CP detection circuit can detect the frequency of the PWM signal. The central controller VDC checks whether the charging conditions are met, where the charging conditions include that the CC2 / CC signal is valid, the battery is not fully charged, and the vehicle has no charging prohibition fault. When it is determined that the charging conditions are met, the regional controller ZCU2 drives the charging electronic lock, locks it, and returns the locked state of the electronic lock to the central controller VDC within the specified time, otherwise the charging process is exited. The CP detection circuit is started by closing the switch of the CP detection circuit, so that the CP signal jumps from a 9V PWM signal to a 6V PWM signal. The national standard charging pile end turns on the power supply circuit, starts energy transmission, and uses the central controller VDC to detect the charging stop condition in real time. When the central controller VDC detects the charging stop condition, it stops energy transmission. After stopping energy transmission, the switch of the CP detection circuit is disconnected, and the regional controller ZCU2 drives the electronic lock to unlock and feedback the position status of the electronic lock. The national standard charging pile end disconnects the power supply circuit within the specified time and stops power supply. The CP signal state of the European and American standard charging pile end jumps from 9V PWM to 12V PWM, disconnects the PWM switch, and ends the national standard AC charging process.

[0129] In summary, the second embodiment of the present invention provides a charging control method that is compatible with national standards and European and American standards. When the charging control circuit of the present invention receives a first European and American standard charging signal using a connection detection circuit, it uses a first regional controller to determine the charging type corresponding to the first European and American standard charging signal, and converts the first European and American standard charging signal into a corresponding first national standard charging signal according to the charging type. The guidance circuit is controlled according to the charging type to perform corresponding signal jumps on the first national standard charging signal, and the central controller is used to perform corresponding charging control according to the first national standard charging signal, thereby achieving compatibility with national standard charging and European and American standard charging, improving the comprehensiveness of charging, simplifying the charging logic conversion process, and improving charging reliability.

[0130] The specific embodiments further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging control circuit compatible with national standards and European and American standards, characterized in that: include: European and American standard charging interface, national standard charging interface, first area controller, second area controller, central controller, connection detection circuit and guidance circuit; The European and American standard charging interface is electrically connected to the first regional controller; The national standard charging interface is electrically connected to the second area controller; The first regional controller is electrically connected to the central controller; The second regional controller is electrically connected to the central controller; The European and American standard charging interface includes a connection signal output terminal and a guide signal output terminal; the connection detection circuit is electrically connected to the European and American standard charging interface, so that the connection detection circuit confirms the charging connection by detecting the voltage change of the European and American standard charging interface; wherein the connection detection circuit is electrically connected to the connection signal output terminal of the European and American standard charging interface; The steering circuit is electrically connected to the European and American standard charging interface so that the steering circuit controls the charging current output by the European and American standard charging interface; wherein the steering circuit is electrically connected to the steering signal output end of the European and American standard charging interface.

2. The charging control circuit according to claim 1, characterized in that: The first zone controller includes: a conversion module, a control module and a signal transceiver; The first end of the conversion module is electrically connected to the European and American standard charging interface; The second end of the conversion module is electrically connected to the first end of the control module; The second end of the control module is electrically connected to the first end of the signal transceiver; The second end of the signal transceiver is electrically connected to the central controller.

3. The charging control circuit according to claim 2, which is compatible with the national standard and the European and American standards, is characterized in that: The conversion module includes: a first transformer, a first high-pass filter circuit and a conversion chip; The first end of the first transformer is electrically connected to the European and American standard charging interface; The second end of the first transformer is electrically connected to the first end of the first high-pass filter circuit; The second end of the first high-pass filter circuit is electrically connected to the first end of the conversion chip; The second end of the conversion chip is electrically connected to the control module.

4. The charging control circuit according to claim 1, characterized in that: The connection detection circuit comprises: a detection power supply and a pull-up resistor; The first end of the pull-up resistor is electrically connected to the detection power supply; The second end of the pull-up resistor is electrically connected to the connection signal output end of the European and American standard charging interface.

5. The charging control circuit according to claim 1, characterized in that: The steering circuit comprises: a first switch, a first resistor, a second switch and a second resistor; The first end of the first switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the first switch is electrically connected to the first end of the first resistor; The second end of the first resistor is electrically connected to the ground signal output end of the European and American standard charging interface; The first end of the second switch is electrically connected to the guide signal output end of the European and American standard charging interface, and the second end of the second switch is electrically connected to the first end of the second resistor; The second end of the second resistor is electrically connected to the ground signal output end of the European and American standard charging interface.

6. The charging control circuit according to claim 5, characterized in that: The steering circuit further includes: a first diode; The anode of the first diode is electrically connected to the pilot signal output terminal; A cathode of the first diode is electrically connected to a common connection point of the first switch and the second switch.

7. The charging control circuit according to claim 1, characterized in that: The European and American standard charging interface includes a European standard charging interface and a first charging interface resistor; The first end of the first charging interface resistor is electrically connected to the connection signal output end of the European standard charging interface; The second end of the first charging interface resistor is electrically connected to the ground signal output end of the European standard charging interface.

8. The charging control circuit according to claim 1, characterized in that: The European and American standard charging interface includes an American standard charging interface and a second charging interface resistor; The first end of the second charging interface resistor is electrically connected to the connection signal output end of the American standard charging interface; The second end of the second charging interface resistor is electrically connected to the ground signal output end of the American standard charging interface.

9. A charging control method compatible with both national and European standards, applied to the charging control circuit compatible with both national and European standards as claimed in any one of claims 1 to 9, characterized in that: The method comprises: Step 101: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal; Step 102: When the charging type is DC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard DC charging signal; Step 103: When the charging type is DC charging, the control steering circuit performs a first state jump process on the first national standard DC charging signal to form a second national standard DC charging signal; Step 104: Control the central controller to perform DC charging according to the second national standard DC charging signal.

10. The charging control method according to claim 9, characterized in that: Also includes: Step 201: When a first European and American standard charging signal is detected at a European and American standard charging interface through a connection detection circuit, a first regional controller is controlled to determine a charging type corresponding to the first European and American standard charging signal; Step 202: When the charging type is AC charging, control the first regional controller to convert the first European and American standard charging signal into a first national standard AC charging signal; Step 203: When the charging type is AC charging, the control steering circuit performs a second state jump process on the first national standard AC charging signal to form a second national standard AC charging signal; Step 204: Control the central controller to perform AC charging according to the second national standard AC charging signal.

Images