A charging control circuit and method compatible with national standards and european standards

Abstract

The application relates to the technical field of new energy vehicles, and discloses a charging control circuit and method compatible with the national standard and the European and American standard. 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. The application can be compatible with the national standard charging and the European and American standard charging, simplifies the charging logic conversion process, and improves the charging reliability.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a charging control circuit and method that is compatible with Chinese and European / American standards. Background Technology

[0002] In recent years, the global new energy vehicle market has developed rapidly and continued to grow. However, new energy vehicles in different countries and regions have different charging standards, charging interfaces, and charging control strategies. Furthermore, China's exports of new energy vehicles have also been growing rapidly in recent years, and the market share of new energy vehicles abroad is constantly expanding. Therefore, if new energy vehicles cannot be charged simultaneously at charging stations in China and Europe and the United States, it will greatly hinder the development of the new energy vehicle market. Thus, ensuring that new energy vehicles exported from China or overseas models in Europe and the United States can be charged using different charging protocols is an urgent problem to be solved.

[0003] Domestic new energy vehicles are charged based on the GB / T charging standard and communicate via CAN, while those in Europe and the United States are charged based on the CCS joint charging standard such as ISO 15118, DIN 70121, and IEC 61851-1, and communicate via PLC power line carrier signals. Currently, new energy vehicles struggle to be compatible with multiple charging standards, and the process of identifying charging standards and converting charging logic is quite complex. Summary of the Invention

[0004] This invention provides a charging control circuit and method that is compatible with both Chinese and European / American standards. It can be compatible with both Chinese and European / American charging standards, simplifies the charging logic conversion process, and improves charging reliability.

[0005] To solve the above-mentioned technical problems, the present invention provides a charging control circuit that is compatible with European and American standards, including: European and American standard charging interface, Chinese standard charging interface, first area controller, second area controller, central controller, connection detection circuit and guide circuit;

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

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

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

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

[0010] The European and American standard charging interface includes a connection signal output terminal and a guide 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 terminal of the European and American standard charging interface.

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

[0013] Furthermore, the first area 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 terminal of the control module is electrically connected to the first terminal of the signal transceiver;

[0017] The second terminal 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 terminal of the first transformer is electrically connected to the European and American standard charging interface;

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

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

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

[0023] Furthermore, 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 terminal of the European and American standard charging interface.

[0026] Furthermore, the guiding circuit includes: a first switch, a first resistor, a second switch, and a second resistor;

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

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

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

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

[0033] The negative terminal of the first diode is electrically connected to the common connection point of the first switch and the second switch.

[0034] Furthermore, 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 terminal of the European standard charging interface.

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

[0037] Furthermore, the European and American standard charging interface includes a US 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 terminal of the American standard charging interface;

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

[0040] Accordingly, the present invention also provides a charging control method that is compatible with Chinese and European / American standards, applied to the aforementioned charging control circuit that is compatible with Chinese and European / American standards, the method comprising:

[0041] Step 101: When the first European and American standard charging signal is detected at the European and American standard charging interface through the connection detection circuit, the first area controller is controlled to determine the 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 area controller to convert the first European and American standard charging signal into the first national standard DC charging signal;

[0043] Step 103: When the charging type is DC charging, the control guidance circuit performs a first state transition 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 that is compatible with European and American standards according to national standards also includes:

[0046] Step 201: When the first European and American standard charging signal is detected at the European and American standard charging interface through the connection detection circuit, the first area controller is controlled to determine the 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 area controller to convert the first European and American standard charging signal into the first national standard AC charging signal;

[0048] Step 203: When the charging type is AC charging, the control guide circuit performs a second state transition 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 a first European and American standard charging signal using the connection detection circuit, it uses a first area controller to determine the charging type corresponding to the first European and American standard charging signal, converts the first European and American standard charging signal into a corresponding first national standard charging signal according to the charging type, controls the guiding circuit to perform corresponding signal switching on the first national standard charging signal according to the charging type, and uses a central controller to perform corresponding charging control according to the first national standard charging signal. This makes it compatible with both national standard charging and European and American standard charging, improves the comprehensiveness of charging, simplifies the charging logic conversion process, and improves charging reliability. Attached Figure Description

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

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

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

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

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

[0057] Figure 6 A schematic diagram of one embodiment of the American Standard Connection Detection Circuit provided by the present invention;

[0058] Figure 7 A schematic diagram of one embodiment of the guiding circuit provided by the present invention;

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

[0060] Figure 9 This is a flowchart illustrating an embodiment of the charging control method for Chinese and European / American standards provided by the present invention. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0063] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0064] Example 1

[0065] See Figure 1This is a schematic diagram of an embodiment of the charging control circuit that is compatible with European and American standards provided by the present invention. The circuit includes a European and American standard charging interface, a Chinese standard charging interface, a first area controller, a second area controller, a central controller, a connection detection circuit, and a guide circuit.

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

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

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

[0069] The second area 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 guiding circuit is electrically connected to the European and American standard charging interface so that the guiding circuit controls the charging current output by the European and American standard charging interface; wherein, the guiding circuit is electrically connected to the guiding signal output terminal of the European and American standard charging interface.

[0072] In the first embodiment of this invention, to enable new energy vehicles to be charged at charging stations in both China and Europe / America, two different regional controllers are set up to handle drive control related to European / American standard charging and Chinese standard charging, respectively, while the charging logic is uniformly decided by a central controller. Specifically, the first regional controller is electrically connected to the European / American standard charging interface to control charging according to European / American standards and to convert European / American standard charging signals into Chinese standard charging signals; the second regional controller is electrically connected to the Chinese standard charging interface to control charging according to Chinese standard. The central controller receives the Chinese standard charging signals processed by the regional controllers and performs corresponding Chinese standard AC / DC charging logic control.

[0073] In the first embodiment of this invention, the European and American standard charging interface is used to connect to a European and American standard charging pile. The connection detection circuit is a PP detection circuit, and the connection signal output terminal of the European and American standard charging interface is a PP signal output terminal. The PP detection circuit is connected to the PP signal output terminal 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 terminal, thereby confirming the charging connection. The guidance circuit is a CP detection circuit, and the guidance signal output terminal of the European and American standard charging interface is a CP signal output terminal. The CP detection circuit is connected to the CP signal output terminal of the European and American standard charging interface. The CP detection circuit can perform charging control, controlling the charging current output by the CP signal output terminal.

[0074] Furthermore, in the first embodiment of the present invention, the first area 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 terminal of the control module is electrically connected to the first terminal of the signal transceiver;

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

[0079] In the first embodiment of the present invention, see Figure 2 This is a structural schematic diagram of an embodiment of the first area controller provided by the present invention. Figure 2 The PLC module is the conversion module, the MCU module is the control module, and the CAN transceiver is the signal transceiver. The first area controller ZCU1, which controls charging according to European and American charging standards, includes a PLC module, an MCU module, and a CAN transceiver. It converts received European and American standard PLC signals into Chinese standard CAN communication signals and transmits the converted charging signals to the central controller VDC. The second area controller ZCU2, which controls charging according to the Chinese standard, only needs to transmit the relevant charging signals to the central controller VDC; it does not require protocol conversion. Therefore, the central controller VDC only needs to contain the Chinese standard charging logic. Thus, by setting up a module in the first area controller ZCU1 to convert charging protocols and process European and American standard charging signals, new energy vehicles can be charged using both European and Chinese standard protocols.

[0080] Furthermore, 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 terminal of the first transformer is electrically connected to the European and American standard charging interface;

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

[0083] The second terminal of the first high-pass filter circuit is electrically connected to the first terminal 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 This is a structural schematic diagram 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 the guide signal output terminal, and the PE signal output terminal is the ground signal output terminal.

[0086] The PLC module includes a first transformer, a first high-pass filter circuit, and a PLC chip. The first transformer is a 1:1:1 transformer, electrically connected to the CP and PE signal outputs of the European / American standard charging interface. It can acquire European / American standard charging signals from the interface and transmit them to the first high-pass filter circuit. The first high-pass filter circuit transmits the European / American standard charging signals to the PLC chip via RX and receives signals from the PLC chip via TX. The PLC chip and the MCU module communicate via SPI and I2C. The PLC chip converts PLC signals into CAN signals and transmits them to the MCU module. The MCU module processes the received CAN signals and transmits the processed CAN signals to the CAN transceiver via TX / RX. The CAN transceiver sends the CAN signals to the central controller VDC for corresponding national standard AC / DC charging control.

[0087] Optionally, the PLC module converts PLC signals into CAN signals. When charging at European and American standard charging piles using AC / DC, it converts the PLC signals into corresponding Chinese standard charging signals in real time and transmits them to the central controller (VDC). The central controller (VDC) then performs the corresponding Chinese standard AC / DC charging logic control. Specifically, in European and American standards, the PLC signal for communication is coupled to the CP signal. After entering the charging control circuit from the European / American standard charging interface, the CP signal undergoes electrical isolation via a transformer and then passes through a high-pass filter circuit before entering the PLC chip. The PLC chip processes the PLC signal coupled to the CP signal and transmits it to the MCU module via the SPI interface. The MCU module obtains the charging-related information from the PLC signal, identifies the corresponding Chinese standard AC / DC charging CAN signal, and sends this CAN signal to the central controller (VDC) using a CAN transceiver for Chinese standard AC / DC charging control.

[0088] Furthermore, 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 terminal of the European and American standard charging interface.

[0091] In the first embodiment of the present invention, see Figure 4 This is a schematic diagram of one embodiment of the 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 the presence of European and American standard charging signals. 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 area controller ZCU1.

[0092] Furthermore, 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 terminal of the European standard charging interface.

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

[0095] Furthermore, in the first embodiment of the present invention, the European and American standard charging interface includes a US 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 terminal of the American standard charging interface;

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

[0098] In the first embodiment of the present invention, see Figure 5 This is a schematic diagram of one embodiment of the European standard connection detection circuit provided by the present invention. See also... Figure 6 This is a schematic 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, and the PE signal output terminal is the ground signal output terminal. The PP detection circuit is the connection detection circuit. The charging resistor of the European standard charging interface is the first charging interface resistor, with its two ends connected to the PP signal output terminal and the PE signal output terminal of the European standard charging interface, respectively. The PE signal output terminal is grounded. The charging resistor of the American standard charging interface is the second charging interface resistor, with its two ends connected to the connection signal output terminal and the ground signal output terminal of the American standard charging interface, respectively. The ground signal output terminal is grounded. Since both the European and American standard charging interfaces are AC / DC integrated, the same PP detection circuit can be used to detect both AC and DC charging signals. However, the resistance and circuitry of the power supply circuits for the European and American standard charging interfaces differ significantly.

[0099] Optionally, the first resistor for the European standard charging interface is 4.7kΩ, and the second resistor for the American standard charging interface is 2.7kΩ. Due to the circuit differences between the European and American standard charging interfaces, the first area controller can determine whether a signal is a European or American standard charging signal by detecting the resistance value. Since the relevant American standard charging standard specifies a 5V pull-up voltage and a 330Ω resistor at the vehicle end, while the European standard does not specify requirements for the vehicle end detection voltage and pull-up resistor, to ensure compatibility with both European and American standard charging, the detection power supply and pull-up resistor of the PP detection circuit can be designed with 5V and 330Ω, referencing the American standard, thus ensuring hardware circuit uniformity and saving hardware resources.

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

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

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

[0105] In the first embodiment of this invention, since both DC and AC charging require a guide circuit when performing European and American standard charging, and AC charging requires a guide circuit when performing Chinese standard charging, the OBC controller is equipped with a guide circuit. However, for new energy vehicles without an OBC controller, only Chinese standard DC charging can be performed. Therefore, by setting a guide circuit in the charging control circuit, it can be compatible with both models with and without OBC controllers, thus achieving compatibility with both European and American standard AC / DC charging and Chinese standard AC / DC charging.

[0106] In the first embodiment of the present invention, the guiding circuit includes a first switch, a first resistor, a second switch, and a second resistor. The first and second resistors are used for circuit protection, and the first and second switches work together to control the activation of the guiding circuit. When a new energy vehicle is detected to have an OBC controller, the guiding circuit in the charging control circuit can be left unactivated during subsequent charging, and the first switch is kept open. When a new energy vehicle is detected to lack an OBC controller, the guiding circuit in the charging control circuit is required for subsequent charging, and the first switch is closed. When it is determined that the charging type is European / American standard charging or Chinese standard AC charging, and therefore the guiding circuit is required, the second switch is closed to activate the guiding circuit in the charging control circuit and complete the corresponding charging control. When it is determined that the charging type is Chinese standard DC charging, the guiding circuit is not required for subsequent charging, and the second switch remains open. Therefore, by setting a first switch in the guiding circuit, it is compatible with both models with and without OBC controllers; by setting a second switch in the guiding circuit, it is compatible with both European / American standard AC / DC charging and Chinese standard AC / DC charging.

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

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

[0109] The negative terminal of the first diode is electrically connected to the common connection point of the first switch and the second switch.

[0110] In the first embodiment of the present invention, see Figure 7This is a schematic diagram of one embodiment of the guiding circuit provided by the present invention. Figure 7 The CP detection circuit is a guiding circuit, and the CP signal output terminal is the guiding signal output terminal. The CP detection circuit is located between the European / American standard charging interface and the first area controller. The first and second resistors of the CP detection circuit are connected in parallel, with one end connected to the CP signal output terminal of the European / American standard charging interface and the other end connected to the PE signal output terminal. The first and second resistors are connected in series with the first and second switches, respectively. The CP detection circuit also includes a first diode. The anode of the first diode is connected to the CP signal output terminal of the European / American standard charging interface, and the cathode is connected to the common connection point of the first and second switches. The control circuit conducts in one direction to prevent signal backflow.

[0111] Currently, the EE architecture has evolved from a distributed model to a cross-domain integrated model, resulting in a strategy that is moved up to the central controller (VDC) and drive control is decentralized to each regional controller (ZCU). Vehicle control can be composed of one central controller (VDC) and multiple regional controllers (ZCUs). As an example of the first embodiment of this invention, see [link to example]. Figure 8This is a schematic diagram of another embodiment of the charging control circuit that is compatible with European and American standards, provided by the present invention. The charging control circuit includes a European / American standard charging interface, a Chinese standard AC charging interface, a Chinese standard DC charging interface, a zone controller ZCU1, a zone controller ZCU2, a central controller VDC, a battery management system (BMS), a battery pack, and an on-board controller (OBC). Zone controller ZCU1 performs CCS charging-related drive control, zone controller ZCU2 performs GB / T charging-related drive control, and the charging logic is uniformly decided by the central controller VDC. Zone controller ZCU1 includes a PP detection circuit compatible with European and American standards, and a newly added CP detection circuit, compatible with both models with and without an OBC controller. Zone controller ZCU1 includes a PLC module that converts PLC signals to CAN signals. In the charging control circuit, the PP detection circuit detects the PP signal on the European / American standard charging interface and sends the detection result to zone controller ZCU1, which can then determine that the charging type is European / American standard charging. The CP detection circuit detects the CP signal on the European / American standard charging interface and sends it to the area controller ZCU1. The area controller ZCU1 analyzes the PLC signal coupled to the CP signal to obtain charging information, which is then transmitted to the central controller VDC. The central controller VDC performs corresponding charging control based on this information. In the charging control circuit, the components communicate using CAN signals. The PLC signal obtained from the European / American standard charging interface, after protocol conversion by the PLC module of the area controller ZCU1, is also communicated in the charging control circuit as a CAN signal. In the charging control circuit, if a valid CC signal is detected, AC charging is initiated; if a valid CC2 signal is detected, DC charging is initiated. Specifically, the Chinese standard AC charging interface transmits the CC signal to the central controller VDC, and the Chinese standard DC charging interface transmits the CC2 signal to the central controller VDC. The European and American standard charging interface is AC / DC integrated. Therefore, after receiving the charging signal, the European and American standard charging interface transmits the charging signal to the area controller ZCU1 for processing. The area controller ZCU1 then sends the CC signal or CC2 signal to the central controller VDC so that the central controller VDC can perform the corresponding charging control.

[0112] In summary, the first embodiment of this invention provides a charging control circuit that is compatible with both Chinese and European / American standards. This circuit includes a European / American standard charging interface, a Chinese standard charging interface, a first area controller, a second area controller, a central controller, a connection detection circuit, and a guidance circuit. The European / American standard charging interface is electrically connected to the first area controller; the Chinese standard charging interface is electrically connected to the second area controller; the first area controller is electrically connected to the central controller; the second area controller is electrically connected to the central controller; the connection detection circuit is electrically connected to the connection signal output terminal of the European / American standard charging interface; and the guidance circuit is electrically connected to the guidance signal output terminal of the European / American standard charging interface. This invention is compatible with both Chinese and European / American standard charging, improving the comprehensiveness of charging. By using the first area controller to convert PLC signals into CAN signals, the charging logic conversion process is simplified, reducing component materials and costs while also facilitating the placement and arrangement of the vehicle's controllers, thus improving charging reliability.

[0113] Example 2

[0114] This invention provides a charging control method that is compatible with Chinese national standards and European and American standards. This method is applied to a charging control circuit that is compatible with Chinese national standards and European and American standards, and includes:

[0115] Step 101: When the first European and American standard charging signal is detected at the European and American standard charging interface through the connection detection circuit, the first area controller is controlled to determine the 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 area controller to convert the first European and American standard charging signal into the first national standard DC charging signal;

[0117] Step 103: When the charging type is DC charging, the control guidance circuit performs a first state transition 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 further includes:

[0120] Step 201: When the first European and American standard charging signal is detected at the European and American standard charging interface through the connection detection circuit, the first area controller is controlled to determine the 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 area controller to convert the first European and American standard charging signal into the first national standard AC charging signal;

[0122] Step 203: When the charging type is AC charging, the control guide circuit performs a second state transition 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 Figure 9 This is a flowchart illustrating an embodiment of the charging control method for Chinese standards compatible with European and American standards provided by the present invention. The following describes this embodiment using four scenarios: European and American standard DC charging, European and American standard AC charging, Chinese standard DC charging, and Chinese standard AC charging.

[0125] The charging control method for European and American standard DC charging is as follows: The charging gun wakes up the area controller ZCU1 via the European and American standard charging signal. The area controller ZCU1 wakes up the central controller VDC. The central controller VDC confirms the connection. When the ZCU1_CC2 signal is detected, it determines that this charging is European and American standard DC charging. The central controller VDC performs a power-on self-test. If an OBC controller is detected, the first switch of the CP detection circuit remains open, and the CP detection circuit is not activated. If no OBC controller is detected, the first switch of the CP detection circuit is closed, completing the transition of the CP signal from 12V to 9V. The area controller ZCU1 establishes communication with the European and American standard charging pile, performs protocol matching, establishes a session, and selects a payment method to complete the European and American standard initialization. The central controller VDC checks whether the charging conditions are met, including a valid CC2 / CC signal, the battery not being fully charged, and the absence of charging prohibition faults in the vehicle. When the charging conditions are determined to be met, the European and American standard charging pile and the central controller VDC perform a handshake to exchange charging parameters. The area controller ZCU1 drives the charging electronic lock, locks it, and returns the locked state to the central controller VDC within a specified time. When the central controller VDC receives a locked status from the electronic lock, it continues the charging process; otherwise, it exits the charging process. If an OBC controller is present, the switch of the CP detection circuit in the OBC controller is closed; if no OBC controller is present, the second switch of the CP detection circuit in the charging control circuit is closed. After the CP detection circuit is activated, insulation monitoring begins at the European and American standard charging pile end. After insulation monitoring, pre-charging begins, and the central controller VDC is used to determine the pre-charging completion condition. When the pre-charging is determined to be complete, energy transfer begins, 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 transfer. After stopping energy transfer, the switch of the CP detection circuit is opened, and the area controller ZCU1 drives the electronic lock to unlock. The area controller ZCU1 ends its communication with the European and American standard charging pile end, and the area controller ZCU1 stops outputting charging-related signals to the central controller VDC, ending the European and American standard DC charging process.

[0126] The charging control method for European and American standard AC charging is as follows: The charging gun wakes up the area controller ZCU1 via the European and American standard charging signal. The area controller ZCU1 wakes up the central controller VDC. The central controller VDC confirms the connection of the ZCU1_CC signal. The central controller VDC performs a power-on self-test. If an OBC controller is detected, the first switch of the CP detection circuit remains open, and the CP detection circuit is not activated. If no OBC controller is detected, the first switch of the CP detection circuit is closed. The area 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 area controller ZCU1 performs PP signal resistance detection and sends the PP signal to the central controller VDC, simulating the corresponding resistance value of the ZCU1_CC signal in the national standard AC charging. The central controller VDC checks whether the charging conditions are met, including a valid CC2 / CC signal, the battery not being fully charged, and the absence of charging prohibition faults in the vehicle. The area controller ZCU1 activates the charging electronic lock, locks the battery, and returns the electronic lock status to the central controller VDC within a specified time. When the central controller VDC receives a locked status from the electronic lock, the charging process continues; otherwise, it exits. If an OBC controller is present, the switch of the CP detection circuit within the OBC controller is closed; otherwise, the second switch of the CP detection circuit in the charging control circuit is closed. Closing the switch of the CP detection circuit activates the CP detection circuit, causing the CP signal to change from a 9V PWM signal to a 6V PWM signal. The power supply circuit at the European / American standard charging pile is connected, initiating energy transfer, and the central controller VDC continuously monitors charging stop conditions. When the central controller VDC detects a charging stop condition, energy transfer is stopped. After energy transfer stops, the switch of the CP detection circuit is disconnected, the area controller ZCU1 drives the electronic lock to unlock, and the electronic lock's position status is fed back. The European / American standard charging pile disconnects the power supply circuit within a specified time, stopping power supply. The CP signal status at the European / American standard charging pile changes from 9V PWM to 12V PWM, the PWM switch is disconnected, and the European / American standard AC charging process ends.

[0127] The charging control method for standard DC charging is as follows: The charging gun wakes up the central controller (VDC) via a standard DC charging signal. The central controller (VDC) confirms the connection. When the VDC_CC2 signal is detected, it determines that the current charging is standard DC charging. The central controller (VDC) establishes communication with the standard charging pile, exchanges initial data such as communication version and vehicle-side insulation detection allowable total voltage, etc. The central controller (VDC) checks whether the charging conditions are met, including a valid CC2 / CC signal, the battery not being fully charged, and the absence of any charging prohibition faults in the vehicle. When the charging conditions are met, the area controller (ZCU2) activates the charging electronic lock, locks the battery, and returns the locked electronic lock status to the central controller (VDC) within a specified time; otherwise, the charging process ends. Insulation monitoring begins at the standard charging pile. After insulation monitoring, the standard charging pile and the central controller (VDC) exchange charging parameters. After the exchange of charging parameters, pre-charging begins, and the central controller (VDC) determines the pre-charging completion condition. When pre-charging is determined to be complete, energy transfer begins, and the central controller (VDC) monitors the charging stop condition in real time. When the central controller VDC detects a charging stop condition, it stops energy transmission. After energy transmission stops, the area controller ZCU2 unlocks the electronic lock and reports the electronic lock's position status. The central controller VDC terminates its session with the national standard charging pile, and the area controller ZCU2 stops outputting charging-related signals to the central controller VDC, thus ending the national standard DC charging process.

[0128] The charging control method for European and American standard AC charging is as follows: The charging gun wakes up the central controller VDC via the national standard AC charging signal. The central controller VDC confirms the connection. If the VDC_CC signal is detected, the charging is national standard AC charging. The central controller VDC performs a power-on self-test. If an OBC controller is detected, the first switch of the CP detection circuit remains open, and the CP detection circuit is not activated; if no OBC controller is detected, the first switch of the CP detection circuit is closed. The central controller detects the resistance value of the CC signal to confirm the connection between the national standard charging pile and the vehicle and to confirm the charging cable's charging capacity. The CP signal is detected using the CP detection circuit. Due to the voltage division by the resistors in the CP detection circuit, the CP signal is detected to be 9V at this time. The national standard charging pile closes the PWM switch and outputs a 12V PWM signal. The CP detection circuit can detect the PWM signal frequency. The central controller VDC checks whether the charging conditions are met, including a valid CC2 / CC signal, the battery not being fully charged, and the absence of any charging prohibition faults in the vehicle. When charging conditions are met, the area controller ZCU2 activates the electronic lock, locking the device and returning it to the central controller VDC within a specified time; otherwise, the charging process ends. The CP detection circuit is activated by closing the switch, causing the CP signal to switch from 9V PWM to 6V PWM. The power supply circuit is then connected at the national standard charging pile end, initiating energy transfer and using the central controller VDC to monitor charging stop conditions in real time. When the central controller VDC detects a charging stop condition, energy transfer is stopped. After energy transfer stops, the CP detection circuit switch is disconnected, the area controller ZCU2 unlocks the electronic lock, and the electronic lock position status is fed back. The national standard charging pile end disconnects the power supply circuit within a specified time, stopping power supply. At the European and American standard charging pile end, the CP signal status switches from 9V PWM to 12V PWM, the PWM switch is disconnected, and the national standard AC charging process ends.

[0129] In summary, the second embodiment of the present invention provides a charging control method that is compatible with Chinese 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 the connection detection circuit, it uses a first area controller to determine the charging type corresponding to the first European and American standard charging signal, converts the first European and American standard charging signal into a corresponding first Chinese national standard charging signal according to the charging type, controls the guiding circuit to perform corresponding signal switching on the first Chinese national standard charging signal according to the charging type, and uses a central controller to perform corresponding charging control according to the first Chinese national standard charging signal. This achieves compatibility with both Chinese national standard charging and European and American standard charging, improves the comprehensiveness of charging, simplifies the charging logic conversion process, and improves charging reliability.

[0130] Specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention in detail. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A charging control circuit compatible with GB and compatible with US and Europe, characterized in that, The application relates to a charging interface, and relates to a charging interface comprising the following parts: a European and American standard charging interface, a Chinese 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 Chinese 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 European and American standard charging interface, so that the connection detection circuit can confirm the charging connection by detecting the voltage change of the European and American standard charging interface; wherein the connection detection circuit is electrically connected with the connection signal output end of the European and American standard charging interface. The guide circuit is electrically connected with the European and American standard charging interface, so that the guide circuit can control the charging current output by the European and American standard charging interface; wherein the guide circuit is electrically connected with the guide signal output end of the European and American standard charging interface. The first area controller comprises a conversion module, a control module and a signal transceiver. The first end of the conversion module is electrically connected with the European and American standard charging interface. The second end of the conversion module is electrically connected with the first end of the control module. The second end of the control module is electrically connected with the first end of the signal transceiver. The second end of the signal transceiver is electrically connected with the central controller. The conversion module comprises a first transformer, a first high-pass filter circuit and a conversion chip. The first end of the first transformer is electrically connected with the European and American standard charging interface. The second end of the first transformer is electrically connected with the first end of the first high-pass filter circuit. The second end of the first high-pass filter circuit is electrically connected with the first end of the conversion chip. The second end of the conversion chip is electrically connected with the control module. The connection detection circuit comprises a detection power supply and a pull-up resistor.

2. The GB-compliant US / Canadian charging control circuit of claim 1, wherein, The first end of the pull-up resistor is electrically connected with the detection power supply. The second end of the pull-up resistor is electrically connected with the connection signal output end of the European and American standard charging interface. The guide circuit comprises a first switch, a first resistor, a second switch and a second resistor.

3. The GB-compliant US-standard charging control circuit according to claim 1, characterized by, The first end of the first switch is electrically connected with the guide signal output end of the European and American standard charging interface, and the second end of the first switch is electrically connected with the first end of the first resistor. The second end of the first resistor is electrically connected with the ground signal output end of the European and American standard charging interface. The first end of the second switch is electrically connected with the guide signal output end of the European and American standard charging interface, and the second end of the second switch is electrically connected with the first end of the second resistor. The second end of the second resistor is electrically connected with the ground signal output end of the European and American standard charging interface. The guide circuit further comprises a first diode.

4. The GB-compliant US-standard charging control circuit according to claim 3, characterized by The anode of the first diode is electrically connected with the guide signal output end. The cathode of the first diode is electrically connected with the common connection point of the first switch and the second switch. The European and American standard charging interface comprises a European standard charging interface and a first charging interface resistor.

5. The GB-compliant US-standard charging control circuit according to claim 1, characterized by, ​ A first end of the first charging interface resistor is electrically connected to a connection signal output end of the Euro-standard charging interface; A second end of the first charging interface resistor is electrically connected to a ground signal output end of the Euro-standard charging interface.

6. The GB-compliant US-standard charging control circuit according to claim 1, characterized by, The Euro-American standard charging interface includes an American standard charging interface and a second charging interface resistor; A first end of the second charging interface resistor is electrically connected to a connection signal output end of the American standard charging interface; A second end of the second charging interface resistor is electrically connected to a ground signal output end of the American standard charging interface.

7. A GB-compliant US-standard charging control method applied to the GB-compliant US-standard charging control circuit according to any one of claims 1-6, characterized in that, The method comprises: Step 101: When a first Euro-American standard charging signal is detected on the Euro-American standard charging interface by a connection detection circuit, controlling a first area controller to determine a charging type corresponding to the first Euro-American standard charging signal; Step 102: When the charging type is direct current charging, controlling the first area controller to convert the first Euro-American standard charging signal into a first national standard direct current charging signal; Step 103: When the charging type is direct current charging, controlling a guide circuit to perform first state jump processing on the first national standard direct current charging signal to form a second national standard direct current charging signal; Step 104: Controlling a central controller to perform direct current charging according to the second national standard direct current charging signal.

8. The GB-compliant US-standard charging control method of claim 7, wherein, Further comprising: Step 201: When a first Euro-American standard charging signal is detected on the Euro-American standard charging interface by a connection detection circuit, controlling a first area controller to determine a charging type corresponding to the first Euro-American standard charging signal; Step 202: When the charging type is alternating current charging, controlling the first area controller to convert the first Euro-American standard charging signal into a first national standard alternating current charging signal; Step 203: When the charging type is alternating current charging, controlling a guide circuit to perform second state jump processing on the first national standard alternating current charging signal to form a second national standard alternating current charging signal; Step 204: Controlling a central controller to perform alternating current charging according to the second national standard alternating current charging signal.

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