A detection device, method and electronic device

Abstract

This application relates to the field of vehicles, and addresses the problem of improving the detection accuracy and reliability of charging connection confirmation signals in integrated designs of on-board chargers and DC / DC converters. This application provides a detection device, method, and electronic device. The detection device includes a first resistor, a sixth resistor, a fourth capacitor, and an amplifier, wherein: one end of the sixth resistor is connected to ground; the other end of the sixth resistor is connected to one end of the fourth capacitor, one end of the first resistor, and the negative input terminal of the amplifier; the other end of the first resistor is connected to the other end of the fourth capacitor and the output terminal of the amplifier. According to the embodiment of this application, the device separates the power ground and signal ground of the DC / DC converter through hardware, uses a differential amplifier circuit for detection, suppresses the influence of common ground noise on the detection of the charging connection confirmation signal, and improves the anti-interference capability and reliability of the charging connection confirmation signal connection status identification.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to a detection device, method and electronic device. Background Technology

[0002] Electric vehicles incorporate an on-board charger (OBC) and a direct current / direct current (DC / DC) converter. With the continuous development of electric vehicle integration technology, in some applications, the OBC and DC / DC converter are integrated into a single design.

[0003] The OBC (On-Board Charger) incorporates a weak signal detection circuit for detecting the charging connection confirmation (CC) signal. However, in devices that integrate the OBC with the DC / DC converter, the large current fluctuations of the DC / DC converter can interfere with the OBC's weak signal detection circuit, affecting the detection accuracy and reliability of the CC signal. This can lead to misjudgments of the charging connection status, impacting the overall vehicle charging safety and performance.

[0004] Therefore, a detection device is needed to detect the charging connection confirmation (CC) signal in the context of an integrated OBC and DC / DC converter design, in order to improve the detection accuracy and reliability of the charging connection confirmation (CC) signal. Summary of the Invention

[0005] To address the issue of improving the detection accuracy and reliability of the charging connection confirmation (CC) signal in the integrated design scenario of OBC and DC / DC converter, this application provides a detection device, method, and electronic device. This application also provides a computer program product and a computer-readable storage medium.

[0006] Specifically, the detection device includes a CC resistance detection circuit, which shares a common housing with the OBC module and the DCDC module for grounding. In the detection device of this embodiment, the CC resistance detection circuit is a differential detection circuit. Specifically, the input voltage at the negative terminal of the amplifier in the CC resistance detection circuit follows the amplifier output and ground.

[0007] According to the apparatus of this application embodiment, when the DC / DC converter outputs a large current, there is a potential difference V between the ground wire GND and the earth. D The CC resistor detection circuit can effectively suppress V D Interference with the detection of CC signals.

[0008] Specifically, the embodiments of this application adopt the following technical solutions: In a first aspect, this application provides a detection device applied to an on-board charger employing an integrated DC / DC converter design. The device is used to detect a charging connection confirmation signal. The device includes a first resistor, a second resistor, a third resistor, a fourth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, an amplifier, a first power supply, a second power supply, a detection point input, and a voltage detection point output, wherein: The detection point input is used to receive a charging connection confirmation signal; The voltage detection point output is used to output a voltage detection signal associated with the charging connection confirmation signal; The first power supply is connected to one end of the seventh resistor; The other end of the seventh resistor is connected to the detection point input and one end of the second resistor; The other end of the second resistor is connected to one end of the first capacitor and the positive input of the amplifier; The other end of the first capacitor is connected to signal ground; One end of the sixth resistor is connected to ground; The other end of the sixth resistor is connected to one end of the fourth capacitor, one end of the first resistor, and the negative input of the amplifier; The other end of the first resistor is connected to the other end of the fourth capacitor, the output terminal of the amplifier, and one end of the third resistor; The other end of the third resistor is connected to one end of the fourth resistor, one end of the second capacitor, and the output of the voltage detection point; The other end of the fourth resistor and the other end of the second capacitor are connected to signal ground; The second power supply is connected to one end of the third capacitor and the power supply terminal of the amplifier; The other end of the third capacitor and the amplifier's ground terminal are connected to signal ground.

[0009] According to the device of the first aspect, by separating the power ground (PE) (connected to earth) and signal ground (GND) of the interference source (DC / DC converter) through hardware, and using a differential amplifier circuit for detection, the influence of common ground noise on CC signal detection is suppressed, thereby improving the anti-interference capability and reliability of CC connection status identification.

[0010] In one implementation of the first aspect, the device further includes a fifth resistor, wherein one end of the fifth resistor is connected to signal ground and the other end of the fifth resistor is connected to the positive input of the amplifier.

[0011] In one implementation of the first aspect, the first power supply is a +5V power supply and the second power supply is a +12V power supply.

[0012] Secondly, this application provides a detection method applied to a vehicle, the vehicle including an on-board charger and a DC / DC converter with an integrated design, the method comprising: In the first state, a charging connection confirmation signal is detected, and a first detection result is obtained. In the first state, the DC / DC converter is not working or is in standby mode. Based on the first test result, determine the interface status of the vehicle interface and obtain the interface status confirmation result, wherein the interface status includes connection status and / or connection specifications. Before the end of this charge / discharge cycle, lock the interface status confirmation result.

[0013] The second method can avoid misjudgments caused by grounding noise, thus ensuring the continuity and reliability of the charging and discharging process.

[0014] According to the second method, the initial state determination and locking are completed within a "quiet window" that is isolated from the operating timing of the interference source (DC / DC converter), which fundamentally avoids the influence of common ground noise on CC signal detection and solves the problem of misjudgment, jitter or jump in CC connection status caused by current fluctuation.

[0015] In one implementation of the second aspect: Connection status includes not connected, partially connected, or fully connected; a fully connected status includes charging connection or discharging connection. Connection specifications include charging gun specifications or discharging gun specifications.

[0016] In one implementation of the second aspect, the end of charging and discharging includes: The charging or discharging session ends, a fault occurs, or the connector is detected to be unplugged.

[0017] In one implementation of the second aspect, the method further includes: After confirming the lock interface status, detect the charging connection confirmation signal and obtain the second detection result; Safety monitoring will be conducted based on the results of the second test.

[0018] Thirdly, this application provides an electronic device, which includes a memory and a processor; The processor is used to execute instructions stored in memory so that the electronic device performs the method as described in the second aspect.

[0019] Fourthly, this application provides a computer program product containing instructions that, when executed by a computing device system, cause a cluster of computing devices to perform the method as described in the first aspect.

[0020] Fifthly, this application provides a computer-readable storage medium including computer program instructions, which, when executed by a computer system, cause the computer system to perform the method as described in the first aspect. Attached Figure Description

[0021] Figure 1 The diagram shown is a schematic diagram of a vehicle charging scenario device connection according to an embodiment of this application; Figure 2 The diagram shown is a schematic diagram of a CC resistance detection circuit according to an embodiment of this application; Figure 3 The diagram shown is a schematic diagram of a CC resistance detection circuit according to an embodiment of this application; Figure 4 The diagram shown is a flowchart of a detection method according to an embodiment of this application; Figure 5 The diagram shown is a schematic flowchart of a detection method according to an embodiment of this application; Figure 6 The diagram shown is a schematic diagram of a detection device according to an embodiment of this application; Figure 7 This is a schematic diagram of an electronic device structure according to an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0024] In an integrated design of the OBC and DC / DC converter, the on-board charger in the vehicle includes the OBC (or OBC module) and the converter (or DC / DC module). The on-board charger connects to an external charging power source (e.g., a charging station) or external electrical equipment via a vehicle interface (charging gun or discharging gun) for charging or discharging operations. The vehicle interface includes a charging connection confirmation (CC) signal interface, which is connected to the internal load (internal resistor RC') of the vehicle interface.

[0025] The on-board charger determines the interface status between the vehicle interface plug and the vehicle socket by measuring the resistance value between the detection point (CC signal interface) of the vehicle interface and the protective ground (EARTH connected to the vehicle interface) in real time.

[0026] Specifically, the on-board charger also includes a CC resistance detection circuit. In one embodiment, the CC resistance detection circuit is part of the OBC module; in another embodiment, the CC resistance detection circuit is a separate circuit independent of the OBC module.

[0027] The vehicle interface includes a resistor RC', which is the equivalent resistance of the current internal resistance of the vehicle interface.

[0028] The detection point of the CC resistance detection circuit is connected to the CC signal interface of the vehicle interface, and the CC signal interface of the vehicle interface is connected to the resistor RC'. The CC resistance detection circuit detects the CC signal of the CC signal interface to obtain the detected value (CC resistance value) of the resistor RC', so that the vehicle can determine the interface status of the vehicle interface based on the detected value of RC'. Alternatively, in another embodiment, the voltage detected value (CC voltage value) for the resistor RC' is obtained, so that the vehicle can determine the interface status of the vehicle interface based on the detected value of RC'.

[0029] Specifically, the interface status of the vehicle interface includes connection status and / or connection specifications. Connection status includes not connected, partially connected, or fully connected. Fully connected includes charging connection or discharging connection. Connection specifications include charging gun specifications or discharging gun specifications. For example, charging gun specifications include 10A, 16A, 32A, and 63A; discharging gun specifications include 10A, 16A, 32A, and 63A.

[0030] For example, Figure 1 The diagram shown is a schematic diagram of a vehicle charging scenario device connection according to an embodiment of this application.

[0031] like Figure 1 As shown, the vehicle interface 110 (charging gun) is connected to the charging pile 120 and the on-board charger 100 to charge the vehicle.

[0032] The on-board charger 100 in the vehicle includes an OBC module 101, a DC-DC module 102, and a CC resistance detection circuit 103.

[0033] The vehicle interface 110 includes a resistor 111 (RC`), which is an equivalent resistance used to represent the current internal resistance of the vehicle interface.

[0034] One end of resistor 111 is connected to interface 112 (CC signal interface) of vehicle interface 110. Interface 112 is connected to detection point 104 of CC resistance detection circuit 103.

[0035] The CC resistance detection circuit 103 detects the CC signal of the interface 112 to obtain the resistance value of the corresponding resistor 111. The vehicle can then determine the interface status of the vehicle interface based on the resistance value of the resistor 111. For example, it can determine that the vehicle interface is fully connected and is in a charging connection, and further confirm the specifications of the charging adapter.

[0036] The OBC and DC / DC converter require grounding. The OBC ground wire is mainly used for common ground signal reference. That is, the OBC ground wire is connected to signal ground (GND). The DC / DC converter ground wire needs to carry the negative maximum current loop. That is, the DC / DC converter is connected to signal ground (GND) and earth (EARTH) (or protective ground (PE), power ground).

[0037] For example, refer to Figure 1 As shown, the OBC module 101, DC-DC module 102, and CC resistance detection circuit 103 are all connected to GND. Furthermore, the DC-DC module 102 is also connected to EARTH.

[0038] In the integrated design of the OBC and DC / DC converter, the OBC module, DC-DC module, and CC resistance detection circuit of the on-board charger share a common ground (the OBC module, DC-DC module, and CC resistance detection circuit are all connected to the housing through the negative terminal of the DC-DC converter). With this shared grounding path, the large current fluctuations of the DC-DC module's ground wire, which must bear a high negative current loop, can severely interfere with the CC resistance detection circuit. This affects the accuracy and reliability of the CC signal detection, potentially leading to misjudgments of the vehicle interface status and impacting the safety and performance of vehicle charging and discharging.

[0039] For example, refer to Figure 1 As shown, the other end of resistor 111 is connected to ground and DC-DC module 102. The large current fluctuations of the DC-DC module will interfere with the CC signal through resistor 111, thereby affecting the detection of the CC signal by the CC resistance detection circuit 103.

[0040] Figure 2 The diagram shown is a schematic diagram of a CC resistance detection circuit according to an embodiment of this application.

[0041] like Figure 2 As shown, vehicle 200 includes on-board charger 201, and on-board charger 201 includes CC resistance detection circuit 202.

[0042] The CC resistance detection circuit 202 includes a detection point input (detection point 11), a voltage detection point output (AD_CC1), resistors R11, R21, R31, R41, RU1, capacitors C11, C21, C31, amplifier U11, and power supplies +5V and +12V.

[0043] The +5V power supply is connected to one end of resistor RU1. The other end of resistor RU1 is connected to detection point 11 and one end of resistor R21. The other end of resistor R21 is connected to one end of capacitor C11 and the positive input terminal of amplifier U11. The other end of capacitor C11 is connected to signal ground GND. One end of resistor R11 is connected to the negative input terminal of amplifier U11. The other end of resistor R11 is connected to the output terminal of amplifier U11 and one end of resistor R31. The other end of resistor R31 is connected to one end of resistor R41, one end of capacitor C2, and the voltage detection point output (AD_CC1). The other end of resistor R41 and the other end of capacitor C21 are connected to signal ground GND. The +12V power supply is connected to one end of capacitor C31 and the power supply terminal of amplifier U11. The other end of capacitor C31, the ground terminal of amplifier U11, and signal ground GND are connected.

[0044] Detection point 11 is connected to CC21 of the vehicle interface.

[0045] The vehicle interface includes resistor RC`1, which is the equivalent resistance representing the current internal resistance of the vehicle interface. One end of resistor RC`1 is connected to the CC signal output interface CC21, and the other end of resistor RC`1 is connected to ground. The detection point access (detection point 11) is connected to CC21.

[0046] When the on-board charger 201 is started, the control chip (e.g., microcontroller (MCU)) of the on-board charger 201 initializes the entire charging system, and the internal power supply circuit supplies power to the +5V and +12V power supplies.

[0047] Resistors RU1 and RC`1 divide the +5V power supply to obtain voltage VCC11 (CC signal). Resistor R21 inputs VCC11 to the positive input of amplifier U11, and resistor R11 inputs the output of amplifier U11 (V... OUT1 The input is given to the negative terminal of amplifier U11, and amplifier U11 outputs the voltage VCC11 at a 1:1 ratio to the output of amplifier U11 (VCC11). OUT1 Resistors R31 and R41 affect the output (V) of amplifier U11. OUT1 Voltage V is obtained by voltage division. AD_CC1 (AD_CC signal), voltage V AD_CC1The (AD_CC signal) is output from the voltage detection point (AD_CC1) and transmitted to the MCU chip of the on-board charger to calculate the resistance value of resistor RC`1. Based on the resistance value of resistor RC`1, the connection status (such as not connected, half connected, fully connected, etc.) and connection specifications are determined (fully connected is divided into charging connection and discharging connection. The charging connection specifications are specifically 10A, 16A, 32A and 63A, and the discharging connection specifications are specifically 10A, 16A, 32A and 63A).

[0048] According to the CC resistance detection circuit 202 described above, when the DC / DC converter outputs a large current, there is a potential difference V between the ground line GND of the CC resistance detection circuit 202 (the GND shared by the CC resistance detection circuit 202 and the DC / DC converter) and EARTH (PE). D Amplifier U11 converts the voltage V across resistor RC`1. RC`1 and V D This data is transmitted together to the voltage detection point output (AD_CC1), causing the detected value to be too high. Therefore, V D Interference with the detection of the resistance value of resistor RC`1 may, in severe cases, cause charging interruption.

[0049] To address the aforementioned issues, one embodiment of this application proposes a detection device for detecting a charging connection confirmation (CC) signal. This detection device is used in an on-board charger employing an integrated DC / DC converter design.

[0050] Specifically, the detection device includes a CC resistance detection circuit. In one embodiment, the deployment of the CC resistance detection circuit of the detection device on the vehicle can refer to... Figure 1 That is, the CC resistance detection circuit of the detection device shares a common housing ground with the OBC module and the DCDC module.

[0051] In the detection device of this application embodiment, the CC resistance detection circuit is a differential detection circuit. Specifically, in one embodiment, the input voltage at the negative terminal of the amplifier in the CC resistance detection circuit follows the amplifier output (refer to...). Figure 2 The embodiment shown is modified so that the input voltage at the negative terminal of the amplifier follows the output voltage of the amplifier and the earth.

[0052] The differential amplifier-based CC resistance detection circuit of this application includes, but is not limited to, the circuit topology, the selection of various components, and the detection method.

[0053] According to the apparatus of this application embodiment, when the DC / DC converter outputs a large current, there is a potential difference V between the ground wire GND and the earth. D The CC resistor detection circuit can effectively suppress V. DInterference with the detection of CC signals.

[0054] Specifically, the CC resistance detection circuit of the detection device includes a first resistor, a second resistor, a third resistor, a fourth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, an amplifier, a first power supply, a second power supply, a detection point input, and a voltage detection point output, wherein: The detection point input is used to receive a charging connection confirmation signal; The voltage detection point output is used to output a voltage detection signal associated with the charging connection confirmation signal; The first power supply is connected to one end of the seventh resistor; The other end of the seventh resistor is connected to the detection point input and one end of the second resistor; The other end of the second resistor is connected to one end of the first capacitor and the positive input of the amplifier; The other end of the first capacitor is connected to signal ground; One end of the sixth resistor is connected to ground; The other end of the sixth resistor is connected to one end of the fourth capacitor, one end of the first resistor, and the negative input of the amplifier; The other end of the first resistor is connected to the other end of the fourth capacitor, the output terminal of the amplifier, and one end of the third resistor; The other end of the third resistor is connected to one end of the fourth resistor, one end of the second capacitor, and the output of the voltage detection point; The other end of the fourth resistor and the other end of the second capacitor are connected to signal ground; The second power supply is connected to one end of the third capacitor and the power supply terminal of the amplifier; The other end of the third capacitor and the amplifier's ground terminal are connected to signal ground.

[0055] Furthermore, in one embodiment, the CC resistance detection circuit of the detection device further includes a fifth resistor, wherein one end of the fifth resistor is connected to signal ground, and the other end of the fifth resistor is connected to the positive input of the amplifier.

[0056] Figure 3 The diagram shown is a schematic diagram of a CC resistance detection circuit according to an embodiment of this application.

[0057] like Figure 3 As shown, vehicle 300 includes on-board charger 301, and on-board charger 301 includes CC resistance detection circuit 302.

[0058] The CC resistance detection circuit 302 includes a detection point input (detection point 12), a voltage detection point output (AD_CC2), resistors R12 (first resistor), R22 (second resistor), R32 (third resistor), R42 (fourth resistor), R52 (fifth resistor), R62 (sixth resistor), RU2 (seventh resistor), capacitors C12 (first capacitor), C22 (second capacitor), C32 (third capacitor), C42 (fourth capacitor), amplifier U12, and power supplies +5V (first power supply) and +12V (second power supply).

[0059] In one embodiment, the hardware parameters of resistors R12 (first resistor), R22 (second resistor), R32 (third resistor), R42 (fourth resistor), RU2 (seventh resistor), capacitors C12 (first capacitor), C22 (second capacitor), C32 (third capacitor), and amplifier U12 can be referenced from those of resistors R11, R21, R31, R41, RU1, capacitors C11, C21, C31, and amplifier U11. The +5V power supply is connected to one end of resistor RU2. The other end of resistor RU2 is connected to detection point 12 and one end of resistor R22. The other end of resistor R22 is connected to one end of capacitor C12, one end of resistor R52, and the positive input terminal of amplifier U12. The other end of capacitor C12 and one end of resistor R52 are connected to signal ground GND. One end of resistor R62 is connected to earth. The other end of resistor R62 is connected to one end of capacitor C42, one end of resistor R12, and the negative input terminal of amplifier U12. The other end of capacitor C42 and the other end of resistor R12 are connected to the output terminal of amplifier U12 and one end of resistor R32. The other end of resistor R32 is connected to one end of resistor R42, one end of capacitor C22, and the voltage detection point output (AD_CC2). The other end of resistor R42 and the other end of capacitor C22 are connected to signal ground GND. The +12V power supply is connected to one end of capacitor C32 and the power supply terminal of amplifier U12, while the other end of capacitor C32, the ground terminal of amplifier U12, and signal ground GND are connected.

[0060] The vehicle interface includes resistor RC`2, which is the equivalent resistance representing the current internal resistance of the vehicle interface. One end of resistor RC`2 is connected to the CC signal output interface CC22, and the other end is connected to ground. The detection point access (detection point 12) is connected to CC22.

[0061] When the on-board charger 301 is started, the control chip (e.g., microcontroller (MCU)) of the on-board charger 301 initializes the entire charging system, and the internal power supply circuit supplies power to the +5V and +12V power supplies.

[0062] Resistors RU2 and RC`2 divide the +5V power supply to obtain voltage VCC12. Resistors R22 and R52 divide VCC12 and input it to the positive input terminal of amplifier U12. Resistors R12 and R62 divide the output voltage (VOUT) of amplifier U12 and input it to the negative input terminal of amplifier U12. Amplifier U12 amplifies the positive and negative input voltages and outputs the result to its output voltage (VOUT). Resistors R32 and R42 divide the output voltage (VOUT) of amplifier U12. OUT2 The voltage VCC22 (AD_CC signal) is obtained by voltage division. The voltage VCC22 (AD_CC signal) is output from the voltage detection point (AD_CC2) and transmitted to the MCU chip of the on-board charger for calculation to obtain the resistance value of resistor RC`2 (CC resistance value). Based on the resistance value of resistor RC`2, the connection status (such as not connected, half connected, fully connected, etc.) and connection specifications are determined (fully connected is divided into charging connection and discharging connection, and the charging connection has four specifications: 10A, 16A, 32A and 63A, and the discharging connection has four specifications: 10A, 16A, 32A and 63A).

[0063] Alternatively, in another embodiment, the voltage VCC22 (AD_CC signal) is output from the voltage detection point (AD_CC2) and transmitted to the MCU chip of the on-board charger to calculate the voltage value (CC voltage value) for resistor RC`2, and the connection status is determined based on the voltage value of resistor RC`2.

[0064] According to the CC resistance detection circuit 302 of this application embodiment, a differential amplifier circuit is used, and the amplifier U12 only transmits the voltage V across the resistor RC`2. RC`2 The amplified signal is then transmitted to the voltage detection point output (AD_CC2), suppressing V. D The resulting deviation.

[0065] based on Figure 2 The circuit structure shown has a voltage V output from the voltage detection point (AD_CC1). AD_CC1 It can be represented as: , (Formula 1) In Formula 1, R 31 R 41 R CC1 R U1 These are the resistance values ​​of resistors R31, R41, RC`1, and RU1, respectively. V S1 This is the voltage (+5V) input to resistor RU1. DThis represents the potential difference between GND and EARTH (PE).

[0066] Ideally, the potential difference V between GND and EARTH (PE) is... D It is 0. In Formula 1, V is included. D The part is V D The resulting deviation.

[0067] Let the error η be the ratio of the deviation value to the accurate value, then the error η1 in Formula 1 can be expressed as: . (Formula 2) based on Figure 3 The circuit structure shown has a voltage V output from the voltage detection point (AD_CC2). AD_CC2 It can be represented as: , (Formula 3) In Formula 1, R 12 R 22 R 32 R 42 R 52 R 62 R CC2 R U2 These are the resistance values ​​of resistors R12, R22, R32, R42, R52, R62, RC`2, and RU2, respectively. S2 This is the voltage (+5V) input to resistor RU2. D This represents the potential difference between GND and EARTH (PE).

[0068] In one embodiment, R is selected 12 = R 22 = R 52 = R 62 =470kΩ, substituting into Formula 3, the above formula is simplified as follows: , (Formula 4) The error η2 in Formula 4 can be expressed as: . (Formula 5) Choose different R CC1、 R CC2 and V D The results shown in Table 1 below can be obtained.

[0069] Table 1 As can be seen from the data in Table 1, if the recognition range of the CC resistance value is selected as 10%, then at V DThe accuracy requirement can be met at a voltage not exceeding 500mV. That is, the apparatus according to the embodiments of this application meets the accuracy requirements at a voltage of V. D If the voltage does not exceed 500mV, the error of the CC resistance value can be controlled within 10%.

[0070] Therefore, the apparatus according to the embodiments of this application can effectively suppress the interference of ground noise on the CC resistor detection circuit when the DC / DC converter is working, and improve the accuracy and reliability of CC signal detection.

[0071] The apparatus according to the embodiments of this application separates the power ground (PE) (connected to earth) and signal ground (GND) of the interference source (DC / DC converter) through hardware, and uses a differential amplifier circuit for detection, thereby suppressing the influence of common ground noise on CC signal detection and improving the anti-interference capability and reliability of CC connection status identification.

[0072] Furthermore, in integrated designs of the OBC and DC / DC converter, when the DC / DC converter outputs a large current, a potential difference V will exist between GND and EARTH (PE). D This can interfere with the CC resistor detection circuit. Therefore, when the DC / DC converter is not operating or in standby mode, it does not output a large current, and thus there will be no potential difference V between GND and EARTH (PE). D This ensures that it will not interfere with the CC resistor detection circuit.

[0073] Furthermore, the interface state (connection status and / or connection specifications) of the vehicle interface is a physical state. Once the vehicle interface is connected, unless due to unforeseen circumstances (malfunction, accidental removal of the charging / discharging gun, etc.), the interface state of the vehicle interface will not change during charging and discharging. That is, whether the DC / DC converter is operating will not affect the interface state of the vehicle interface.

[0074] Based on the above analysis, one embodiment of this application proposes a detection method for detecting the interface status of a vehicle interface. The method provided in any embodiment of this application can be applied to vehicles employing an integrated design of an on-board charger and a DC / DC converter. Specifically, the method provided in any embodiment of this application can be applied to on-board chargers, vehicle-mounted systems, or other vehicle-mounted electronic devices.

[0075] The detection method provided in this application embodiment can be applied to, for example... Figure 1 The system shown. Specifically, in one embodiment, the detection method provided in this application can be applied to, for example, Figure 2 The system shown. In another embodiment, the detection method provided in this application can be applied to, for example, Figure 3 The system shown.

[0076] In the detection method of this application embodiment, when the DC / DC converter is not working or in standby mode, the CC signal is detected and the interface status of the vehicle interface is determined based on the detection result, thereby obtaining an accurate interface status confirmation result. Subsequently, during the current charging and discharging process, the obtained interface status confirmation result is locked. That is, during the current charging and discharging process, the initially detected interface status confirmation result is used as the standard, and the interface status is not re-determined based on subsequent CC signal detection results.

[0077] Specifically, Figure 4 The diagram shown is a flowchart of a detection method according to an embodiment of this application.

[0078] In one embodiment, the electronic device performs as follows Figure 4 The following process is shown to detect the interface status of the vehicle interface.

[0079] S400, in the first state, detects a charging connection confirmation signal and obtains a first detection result, wherein in the first state, the DC / DC converter is not working or is in standby state.

[0080] Specifically, in the first state, the DC / DC converter is in an inactive or standby state, with no large current flowing through its power circuit and the grounding network in a "quiet" state.

[0081] In one embodiment, the first state includes a window period after the vehicle's on-board charger system is initially powered on or awakened (e.g., awakened after the charging gun or discharging gun is inserted), during which the DC / DC converter has not yet started (i.e., there is no large current disturbance).

[0082] For example, the first state includes the system being powered on or the vehicle being triggered into charging preparation mode by events such as control guidance (CP) signals or vehicle wake-up signals.

[0083] Specifically, in one embodiment, in S400, the first detection result is the CC resistance value or the CC voltage value. The first detection result can be obtained based on... Figure 1 The CC resistance detection circuit 103 shown is implemented, or based on Figure 2 The CC resistance detection circuit 202 shown is implemented, or based on Figure 3 The CC resistance detection circuit 302 shown is implemented.

[0084] Specifically, in one embodiment, the calculation of the first detection result can refer to Formula 1 or Formula 3. Specifically, in S400, V in Formula 1 or Formula 3... D It is 0.

[0085] S401, based on the first detection result, determine the interface status of the vehicle interface and obtain the interface status confirmation result. The interface status of the vehicle interface includes the connection status and / or connection specifications.

[0086] Specifically, in one embodiment, the interface status of the vehicle interface is determined by querying a preset resistance-state mapping table based on the CC resistance value or CC voltage value obtained in S400.

[0087] For example, in one embodiment, based on the provisions of GB 18487.1 / 18487.4, the corresponding interface state is determined according to the CC resistance value. Specifically, according to GB 18487.1, charging connections: 10A, 16A, 32A, and 63A correspond to 1500Ω, 680Ω, 220Ω, and 100Ω, respectively; according to GB 18487.4, discharging connections: 10A, 16A, 32A, and 63A correspond to 2700Ω, 2000Ω, 1000Ω, and 470Ω, respectively.

[0088] S402, before the end of this charge / discharge cycle, lock the interface status confirmation result of the vehicle interface.

[0089] Specifically, in one embodiment, the end of charging and discharging includes: The charging or discharging session ends, a fault occurs, or the connector is detected to be unplugged.

[0090] In one embodiment, locking the interface status confirmation result of the vehicle interface means that, throughout the subsequent charging or discharging process, the interface status confirmation result of the vehicle interface will no longer be updated based on the CC resistance value or CC voltage value. That is, subsequently, due to V... D The presence of this causes fluctuations in the detected CC resistance or CC voltage values, but the interface status confirmation result of the vehicle interface is no longer updated based on the fluctuating CC resistance or CC voltage values.

[0091] Furthermore, considering the possibility of unexpected situations during charging and discharging, such as the charging gun or discharging gun being accidentally pulled out.

[0092] Therefore, in one embodiment, S403 and S404 are also executed after S402.

[0093] S403, after confirming the interface status of the locked vehicle interface, detects the charging connection confirmation signal and obtains the second detection result; S404, Safety monitoring is conducted based on the second test result.

[0094] Specifically, the second detection result can be obtained by referring to the first detection result. The second detection result is only used for safety monitoring and is not used to update the interface status confirmation result of the vehicle interface. That is, after S402, during the subsequent entire charging and discharging process, although the CC resistance value or CC voltage value (second detection result) will still be monitored in real time for safety monitoring (such as abnormal disconnection detection) (S403, S404), the interface status confirmation result of the locked vehicle interface will no longer be updated based on the monitored CC resistance value or CC voltage value (second detection result). The locked state of S402 will be maintained until the charging session ends normally, a fault occurs, or the controller detects that the connector has been disconnected.

[0095] The method according to the embodiments of this application can avoid misjudgment caused by grounding noise and ensure the continuity and reliability of the charging and discharging process.

[0096] According to the method of this application embodiment, the initial state determination and locking are completed within a "quiet window" that is isolated from the working timing of the interference source (DC / DC converter), which fundamentally avoids the influence of common ground noise on CC signal detection and solves the problem of misjudgment, jitter or jump of CC connection status caused by current fluctuation.

[0097] Figure 5 The diagram shown is a schematic flowchart of a detection method according to an embodiment of this application.

[0098] In one embodiment, the vehicle's on-board charger system performs... Figure 5 The following process is shown to achieve vehicle charging and discharging.

[0099] S500, the on-board charger system enters charging preparation mode.

[0100] Specifically, in one embodiment, in S500, the on-board charger system is powered on or triggered by events such as a control guidance (CP) signal or a vehicle wake-up signal, and enters the charging preparation mode. At this time, the DC / DC converter in the on-board charger system is in a non-operating or standby state, no large current flows through its power circuit, and the grounding network is in a "quiet" state.

[0101] S501, the on-board charger system repeatedly detects the CC signal and obtains multiple CC signal detection results (CC resistance values).

[0102] The execution of S501 can refer to S400.

[0103] S502 performs jitter removal and digital filtering on multiple CC signal detection results to obtain the first detection result.

[0104] Specifically, in S502, multiple CC signal detection results are processed by software de-jittering and digital filtering to eliminate jitter interference at the moment of contact and obtain a stable and reliable measurement value (first detection result).

[0105] S503, based on the first detection result, determine the interface status of the vehicle interface and obtain the interface status confirmation result.

[0106] The execution of S503 can refer to S401.

[0107] According to the method (S501~S503) of this application embodiment, an interference-free "detection window" is created. The on-board charger system is required by process to complete the sampling, filtering, and status determination of the CC signal before the DC / DC converter starts (introducing an interference source).

[0108] S504, confirmation result of the interface status of the locked vehicle interface.

[0109] The execution of S504 can be referenced from S402.

[0110] In S503, an initial connection status signal is generated to indicate the interface status of the vehicle interface. In S504, the initial connection status signal generated in S503 is written to a latch register or a status flag is set. From this point on, the CC connection status reported to the upper-level Battery Management System (BMS) or Vehicle Controller Unit (VCU) is determined by this locked initial connection status signal.

[0111] Specifically, S504 is an active and mandatory logical behavior. Once the interface status confirmation result is confirmed, the on-board charger system does not simply remember this value, but logically "freezes" or "shiels" the update path to the CC connection status by setting a status flag in software or using a latch.

[0112] S505, initiates charging or discharging.

[0113] Specifically, in S505, the on-board charger system issues a command to start the DC / DC converter and / or activate the power factor correction (PFC) circuit of the OBC. The on-board charger system begins to officially transfer energy, at which point a large current begins to appear on the ground network (causing V... D ).

[0114] Specifically, in one embodiment, the control circuit inside the integrated device formed by OBC and DCDC locks a connection status confirmation result of a CC connection state, and will not update it until S500~S503 is repeated. The integrated device formed by OBC and DCDC transmits the connection status confirmation result to BMS / VCU through bus communication.

[0115] After S505, the DC / DC converter and OBC enter normal operation mode. During the normal operation of the DC / DC converter and OBC, the interface status confirmation result (initial connection status signal) of the vehicle interface is locked.

[0116] S506 is executed during the period when the DC / DC converter and OBC enter normal operating mode.

[0117] S506, the on-board charger system monitors the CC signal and obtains the CC signal detection result (second detection result).

[0118] Specifically, in S506, the CC resistance detection circuit continues to operate, continuously or periodically sampling and measuring the CC signal. However, its purpose is no longer to update the interface status confirmation results of the vehicle interface, but to perform real-time safety monitoring.

[0119] According to the method of this application embodiment, the function of the CC resistance detection circuit is redefined and stripped away. During the "lock-in phase," the CC resistance detection circuit continues to operate, but its data usage is fundamentally changed.

[0120] S507, based on the CC signal detection result (second detection result) obtained in S506, determine whether there is an abnormality.

[0121] Specifically, in S507, the CC signal detection result sampled in real time by S506 is compared with the locked interface status confirmation result (or the pre-stored normal threshold for CC signal detection) to determine whether the CC signal detection result sampled in real time by S506 is within the normal threshold range.

[0122] Specifically, in one embodiment, S507 is used to detect major abnormal events such as unexpected disconnection of the connector (accidental removal of the gun). For example, if the CC resistance is detected to suddenly become infinite (or greater than 3100 ohms, the lower limit of the resistance value of a half-connection), it can be determined that the connector has been disconnected.

[0123] Furthermore, S507 also detects other anomalies (faults) in the on-board charger system, such as overcurrent and overvoltage. Specifically, overcurrent and overvoltage refer to the on-board charger system's current and voltage exceeding limits, which can be detected by the on-board charger system through current and voltage sensors. Moreover, the anomalies (faults) detected in S507 refer to any anomalies (faults) that can lead to charging failure, and are not necessarily anomalies (faults) related to the CC signal.

[0124] If S507 determines that no exception exists, then S508 is executed.

[0125] The S508, DC / DC converter, and OBC continue to operate, maintaining the lock on the interface status confirmation result of the vehicle interface and ignoring ground noise fluctuations.

[0126] When S507 determines that an abnormality exists (e.g., a fault such as a disconnection, overvoltage, or overcurrent is detected); or the charging / discharging process ends normally (determined by the BMS based on information such as SOC); or the on-board charger system receives a power-off command, then S509~S511 are executed.

[0127] S509, shut down the power circuit.

[0128] Specifically, in S509, the control DC / DC converter and OBC stop working, cut off power transmission, and restore the grounding network to "quiet".

[0129] S510, unlock the interface status confirmation result of the vehicle interface.

[0130] Specifically, in S510, the initial connection status signal or the status flag bit corresponding to the initial connection status signal in the latch register is cleared, and the lock on the interface status confirmation result of the vehicle interface is released.

[0131] S511, On-board charger system reset.

[0132] Specifically, in S511, the control logic of the on-board charger system is reset and returns to the state before S500, preparing to detect the CC signal again and waiting for the start of the next charge and discharge cycle.

[0133] Referring to S500~S511, the method of this application embodiment is a complete, closed-loop control process. It is not an isolated algorithm, but a state machine that is deeply coupled with the start-stop control of OBC and DC-DC and the whole vehicle charging process.

[0134] The method according to the embodiments of this application greatly reduces the sensitivity of the on-board charger (OBC) to changes in the load of the DC / DC converter, allowing both to work stably in a more tightly integrated design (such as shared housing, shared heat dissipation, and shared grounding), providing technical assurance for higher integration and improving the robustness of the entire system.

[0135] The method according to the embodiments of this application avoids charging interruptions, restarts, or sudden power drops caused by misjudgment of CC signals, ensuring the smoothness and continuity of the charging process and improving the user experience. Simultaneously, it provides a stable and reliable connection status signal to the battery management system (BMS), ensuring the accurate execution of the vehicle's charging strategy.

[0136] According to the method in the embodiments of this application, the method has natural immunity to instantaneous large current surges generated when the DC / DC converter starts up or the load changes abruptly. The on-board charger system will not make a false response to such transient interference, and the anti-interference capability is stronger.

[0137] Furthermore, in order to implement the detection method proposed in the embodiments of this application, an embodiment of this application also proposes a detection device.

[0138] In the description of the embodiments of this application, for the sake of convenience, the device is described by dividing it into various modules according to its functions. The division of each module is only a logical functional division. When implementing the embodiments of this application, the functions of each module can be implemented in one or more software and / or hardware.

[0139] Specifically, the apparatus proposed in this application can be fully or partially integrated onto a single physical entity (e.g., a GPU or other type of processor), or it can be physically separated. These modules can be implemented entirely in software via processing element calls; entirely in hardware; or some modules can be implemented in software via processing element calls, while others are implemented in hardware. For example, the detection module can be a separate processing element or integrated into a chip in an electronic device. The implementation of other modules is similar. Furthermore, these modules can be fully or partially integrated together or implemented independently. During implementation, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions.

[0140] For example, these modules can be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs). Alternatively, these modules can be integrated together as a system-on-a-chip (SOC).

[0141] Figure 6 The diagram shown is a schematic diagram of a detection device according to an embodiment of this application.

[0142] like Figure 6 As shown, the detection device 600 includes a detection module 601, a judgment module 602, and a locking module 603.

[0143] The detection module 601 is used to detect the charging connection confirmation signal and obtain the first detection result in the first state, wherein the DC / DC converter is not working or is in standby state in the first state.

[0144] The specific functions of the detection module 601 can be found in S400, S501, S502, and... Figure 2 , Figure 3 The corresponding description.

[0145] The judgment module 602 is used to determine the interface status of the vehicle interface based on the first detection result obtained by the detection module 601 in the first state, and obtain the interface status confirmation result.

[0146] The specific functions of the judgment module 602 can be found in S401 and S503.

[0147] The locking module 603 is used to lock the interface status confirmation result of the vehicle interface before the end of this charge / discharge cycle.

[0148] The specific functions of the locking module 603 can be found in S402 and S504.

[0149] The apparatus in this application embodiment is applied to an electronic device, which may be a vehicle, a vehicle-mounted system, an on-board charger, or other on-board electronic devices.

[0150] The embodiments of this application do not limit the specific manner in which the device is implemented. Those skilled in the art can design the implementation manner of the device according to the actual situation.

[0151] For example, in one embodiment, the device is installed on the electronic device in hardware (e.g., a functional chip). In another embodiment, the device is installed in the operating system of the electronic device as software code. Yet another embodiment, the device is installed on the electronic device as a combination of hardware and software.

[0152] Furthermore, in one embodiment, the device is mounted on an electronic device.

[0153] In another embodiment, the device is mounted on multiple electronic devices, which together form a complete device structure. Different electronic devices may install the same functional modules, or different electronic devices may install different functional modules.

[0154] An embodiment of this application also proposes an electronic device. This electronic device is used to execute the method flow or part of the method flow described in the embodiments of this application. The electronic device may be a vehicle, on-board charger, on-board charger system, or other on-board electronic device as described in the embodiments of this specification.

[0155] Figure 7 This is a schematic diagram of an electronic device structure according to an embodiment of this application.

[0156] like Figure 7 As shown, the electronic device 2500 includes a memory 2502 for storing computer program instructions and a processor 2501 for executing the program instructions. When the computer program instructions are executed by the processor 2501, the electronic device 2500 is triggered to execute the method steps performed by the terminal device, base station device, or server device as described in the embodiments of this application.

[0157] Specifically, in one embodiment of this application, the aforementioned one or more computer programs are stored in the aforementioned memory 2502. The aforementioned one or more computer programs include instructions that, when executed by the aforementioned electronic device 2500, cause the aforementioned electronic device 2500 to perform the method steps described in the embodiments of this application.

[0158] It is understood that the structural description of the electronic device 2500 in this application does not constitute a specific limitation on the electronic device 2500. In other embodiments of this application, the electronic device 2500 may include other components besides the processor 2501 and the memory 2502.

[0159] In one embodiment, the processor 2501 may be an on-chip device (SOC) or other architecture, and the processor 2501 may include a central processing unit (CPU), and may further include other types of processors.

[0160] Processor 2501 may include one or more processing units. For example, the processing units of processor 2501 may include any combination of one or more of the following: Central Processing Unit (CPU), Digital Signal Processor (DSP), Microcontroller Unit (MCU), Digital Signal Processor (DSP), Application Processor (AP), Graphics Processing Unit (GPU), Neural-network Processing Units (NPU), Image Signal Processing (ISP), Modem Processor, Controller, Video Codec, and Baseband Processor. Processing units of processor 2501 may also include other processing units besides those described above.

[0161] In processor 2501, different processing units can be independent devices or integrated into one or more processors. The controller can generate operation control signals based on the instruction opcode and timing signals to control instruction fetching and execution.

[0162] The processor may also include necessary hardware accelerators or logic processing hardware circuitry, such as an ASIC, or one or more integrated circuits for controlling the execution of the program in this application. Furthermore, the processor may have the capability to operate one or more software programs, which may be stored in a storage medium.

[0163] The processor 2501 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 2501 is a cache memory. This memory can store instructions or data that the processor 2501 has just used or is recurring. If the processor 2501 needs to use the instruction or data again, it can directly retrieve it from the memory. This avoids repeated accesses, reduces the waiting time of the processor 2501, and thus improves the efficiency of the system.

[0164] In some embodiments, processor 2501 may include one or more interfaces.

[0165] The interfaces of the processor 2501 may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0166] The memory 2502 can be used to store computer executable program code, which includes instructions.

[0167] The memory 2502 may include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function, etc. The data storage area may store data created during the use of the electronic device 100, etc.

[0168] The memory 2502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc. The processor 2501 executes various functional applications and data processing of the electronic device 100 by running instructions stored in the memory 2502 and / or instructions stored in memory disposed in the processor.

[0169] The memory 2502 may be a read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types of dynamic storage devices that can store information and instructions. It may also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices. Alternatively, it may be any computer-readable medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer.

[0170] Processor 2501 and memory 2502 can be combined into a single processing device, but more commonly they are separate components.

[0171] An embodiment of this application also provides an electronic chip. This electronic chip is used to execute the method flow or part of the method flow described in the embodiments of this application.

[0172] Specifically, the electronic chip includes a processor for executing program instructions. When the computer program instructions are executed by the processor, the electronic chip is triggered to perform the steps described in the embodiments of this application. The processor of the electronic chip can refer to the processor of the above-described electronic device.

[0173] Optionally, the devices, apparatuses, and modules described in the embodiments of this application may be implemented by computer chips or physical entities, or by products with certain functions.

[0174] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media containing computer-usable program code.

[0175] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0176] Specifically, one embodiment of this application also provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to execute the method provided in the embodiment of this application.

[0177] An embodiment of this application also provides a computer program product, which includes a computer program that, when run on a computer, causes the computer to perform the method provided in the embodiment of this application.

[0178] The embodiments described in this application are described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0179] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0180] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0181] It should also be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0182] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0183] This application can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0184] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0185] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments of this application can be implemented using electronic hardware, computer software, or a combination of electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0186] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0187] The above description is merely a specific embodiment of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. The protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A detection device, characterized in that, The device is applied to an on-board charger with an integrated DC / DC converter design. The device is used to detect a charging connection confirmation signal. The device includes a first resistor, a second resistor, a third resistor, a fourth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, an amplifier, a first power supply, a second power supply, a detection point input, and a voltage detection point output, wherein: The detection point input is used to receive the charging connection confirmation signal; The voltage detection point output is used to output a voltage detection signal associated with the charging connection confirmation signal; The first power source is connected to one end of the seventh resistor; The other end of the seventh resistor is connected to the detection point inlet and one end of the second resistor; The other end of the second resistor is connected to one end of the first capacitor and the positive input terminal of the amplifier; The other end of the first capacitor is connected to signal ground; One end of the sixth resistor is connected to ground; The other end of the sixth resistor is connected to one end of the fourth capacitor, one end of the first resistor, and the negative input of the amplifier; The other end of the first resistor is connected to the other end of the fourth capacitor, the output terminal of the amplifier, and one end of the third resistor; The other end of the third resistor is connected to one end of the fourth resistor, one end of the second capacitor, and the output of the voltage detection point. The other end of the fourth resistor and the other end of the second capacitor are connected to signal ground; The second power supply is connected to one end of the third capacitor and the power supply terminal of the amplifier; The other end of the third capacitor and the ground terminal of the amplifier are connected to signal ground.

2. The apparatus according to claim 1, characterized in that, The device further includes a fifth resistor, wherein one end of the fifth resistor is connected to signal ground and the other end of the fifth resistor is connected to the positive input of the amplifier.

3. The apparatus according to claim 1 or 2, characterized in that, The first power supply is a +5V power supply, and the second power supply is a +12V power supply.

4. A detection method, characterized in that, The method is applied to a vehicle, the vehicle including an on-board charger and a DC / DC converter with an integrated design, the method comprising: In the first state, a charging connection confirmation signal is detected, and a first detection result is obtained. In the first state, the DC / DC converter is not working or is in standby mode. Based on the first detection result, determine the interface status of the vehicle interface and obtain the interface status confirmation result, wherein the interface status includes connection status and / or connection specification; Before the end of this charge / discharge cycle, the interface status confirmation result is locked.

5. The method according to claim 4, characterized in that: The connection status includes not connected, partially connected, or fully connected; the fully connected status includes charging connection or discharging connection. The connection specifications include charging gun specifications or discharging gun specifications.

6. The method according to claim 4 or 5, characterized in that, The end of the charging and discharging process includes: The charging or discharging session ends, a fault occurs, or the connector is detected to be unplugged.

7. The method according to any one of claims 4-6, characterized in that, The method further includes: After confirming the interface status, the charging connection confirmation signal is detected to obtain a second detection result; Safety monitoring will be conducted based on the second detection result.

8. An electronic device, characterized in that, The electronic device includes a memory and a processor; The processor is configured to execute instructions stored in the memory to cause the electronic device to perform the method as described in any one of claims 4-7.

9. A computer program product containing instructions, characterized in that, When the instruction is executed by the computing device system, it causes the computing device cluster to perform the method as described in any one of claims 4-7.

10. A computer-readable storage medium, characterized in that, It includes computer program instructions, which, when executed by a computer system, perform the method as described in any one of claims 4-7.

Images